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 /* x86-64 ELF linker hash entry. */
1066 struct elf_x86_64_link_hash_entry
1068 struct elf_link_hash_entry elf;
1070 /* Track dynamic relocs copied for this symbol. */
1071 struct elf_dyn_relocs *dyn_relocs;
1073 #define GOT_UNKNOWN 0
1074 #define GOT_NORMAL 1
1075 #define GOT_TLS_GD 2
1076 #define GOT_TLS_IE 3
1077 #define GOT_TLS_GDESC 4
1078 #define GOT_TLS_GD_BOTH_P(type) \
1079 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
1080 #define GOT_TLS_GD_P(type) \
1081 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
1082 #define GOT_TLS_GDESC_P(type) \
1083 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
1084 #define GOT_TLS_GD_ANY_P(type) \
1085 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
1086 unsigned char tls_type;
1088 /* TRUE if a weak symbol with a real definition needs a copy reloc.
1089 When there is a weak symbol with a real definition, the processor
1090 independent code will have arranged for us to see the real
1091 definition first. We need to copy the needs_copy bit from the
1092 real definition and check it when allowing copy reloc in PIE. */
1093 unsigned int needs_copy : 1;
1095 /* TRUE if symbol has GOT or PLT relocations. */
1096 unsigned int has_got_reloc : 1;
1098 /* TRUE if symbol has non-GOT/non-PLT relocations in text sections. */
1099 unsigned int has_non_got_reloc : 1;
1101 /* Don't call finish_dynamic_symbol on this symbol. */
1102 unsigned int no_finish_dynamic_symbol : 1;
1104 /* TRUE if symbol is __tls_get_addr. */
1105 unsigned int tls_get_addr : 1;
1107 /* Reference count of C/C++ function pointer relocations in read-write
1108 section which can be resolved at run-time. */
1109 bfd_signed_vma func_pointer_refcount;
1111 /* Information about the GOT PLT entry. Filled when there are both
1112 GOT and PLT relocations against the same function. */
1113 union gotplt_union plt_got;
1115 /* Information about the second PLT entry. */
1116 union gotplt_union plt_second;
1118 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
1119 starting at the end of the jump table. */
1120 bfd_vma tlsdesc_got;
1123 #define elf_x86_64_hash_entry(ent) \
1124 ((struct elf_x86_64_link_hash_entry *)(ent))
1126 struct elf_x86_64_obj_tdata
1128 struct elf_obj_tdata root;
1130 /* tls_type for each local got entry. */
1131 char *local_got_tls_type;
1133 /* GOTPLT entries for TLS descriptors. */
1134 bfd_vma *local_tlsdesc_gotent;
1137 #define elf_x86_64_tdata(abfd) \
1138 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
1140 #define elf_x86_64_local_got_tls_type(abfd) \
1141 (elf_x86_64_tdata (abfd)->local_got_tls_type)
1143 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
1144 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
1146 #define is_x86_64_elf(bfd) \
1147 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1148 && elf_tdata (bfd) != NULL \
1149 && elf_object_id (bfd) == X86_64_ELF_DATA)
1152 elf_x86_64_mkobject (bfd *abfd)
1154 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
1158 /* x86-64 ELF linker hash table. */
1160 struct elf_x86_64_link_hash_table
1162 struct elf_link_hash_table elf;
1164 /* Short-cuts to get to dynamic linker sections. */
1166 asection *plt_eh_frame;
1167 asection *plt_second;
1168 asection *plt_second_eh_frame;
1170 asection *plt_got_eh_frame;
1172 /* Parameters describing PLT generation, lazy or non-lazy. */
1173 struct elf_x86_64_plt_layout plt;
1175 /* Parameters describing lazy PLT generation. */
1176 const struct elf_x86_64_lazy_plt_layout *lazy_plt;
1178 /* Parameters describing non-lazy PLT generation. */
1179 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt;
1183 bfd_signed_vma refcount;
1187 /* The amount of space used by the jump slots in the GOT. */
1188 bfd_vma sgotplt_jump_table_size;
1190 /* Small local sym cache. */
1191 struct sym_cache sym_cache;
1193 bfd_vma (*r_info) (bfd_vma, bfd_vma);
1194 bfd_vma (*r_sym) (bfd_vma);
1195 unsigned int pointer_r_type;
1196 const char *dynamic_interpreter;
1197 int dynamic_interpreter_size;
1199 /* _TLS_MODULE_BASE_ symbol. */
1200 struct bfd_link_hash_entry *tls_module_base;
1202 /* Used by local STT_GNU_IFUNC symbols. */
1203 htab_t loc_hash_table;
1204 void * loc_hash_memory;
1206 /* The offset into splt of the PLT entry for the TLS descriptor
1207 resolver. Special values are 0, if not necessary (or not found
1208 to be necessary yet), and -1 if needed but not determined
1210 bfd_vma tlsdesc_plt;
1211 /* The offset into sgot of the GOT entry used by the PLT entry
1213 bfd_vma tlsdesc_got;
1215 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
1216 bfd_vma next_jump_slot_index;
1217 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
1218 bfd_vma next_irelative_index;
1220 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
1221 to read-only sections. */
1222 bfd_boolean readonly_dynrelocs_against_ifunc;
1225 /* Get the x86-64 ELF linker hash table from a link_info structure. */
1227 #define elf_x86_64_hash_table(p) \
1228 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
1229 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
1231 #define elf_x86_64_compute_jump_table_size(htab) \
1232 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
1234 /* Create an entry in an x86-64 ELF linker hash table. */
1236 static struct bfd_hash_entry *
1237 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
1238 struct bfd_hash_table *table,
1241 /* Allocate the structure if it has not already been allocated by a
1245 entry = (struct bfd_hash_entry *)
1246 bfd_hash_allocate (table,
1247 sizeof (struct elf_x86_64_link_hash_entry));
1252 /* Call the allocation method of the superclass. */
1253 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1256 struct elf_x86_64_link_hash_entry *eh;
1258 eh = (struct elf_x86_64_link_hash_entry *) entry;
1259 eh->dyn_relocs = NULL;
1260 eh->tls_type = GOT_UNKNOWN;
1262 eh->has_got_reloc = 0;
1263 eh->has_non_got_reloc = 0;
1264 eh->no_finish_dynamic_symbol = 0;
1265 eh->tls_get_addr = 0;
1266 eh->func_pointer_refcount = 0;
1267 eh->plt_second.offset = (bfd_vma) -1;
1268 eh->plt_got.offset = (bfd_vma) -1;
1269 eh->tlsdesc_got = (bfd_vma) -1;
1275 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1276 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1277 as global symbol. We reuse indx and dynstr_index for local symbol
1278 hash since they aren't used by global symbols in this backend. */
1281 elf_x86_64_local_htab_hash (const void *ptr)
1283 struct elf_link_hash_entry *h
1284 = (struct elf_link_hash_entry *) ptr;
1285 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
1288 /* Compare local hash entries. */
1291 elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
1293 struct elf_link_hash_entry *h1
1294 = (struct elf_link_hash_entry *) ptr1;
1295 struct elf_link_hash_entry *h2
1296 = (struct elf_link_hash_entry *) ptr2;
1298 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
1301 /* Find and/or create a hash entry for local symbol. */
1303 static struct elf_link_hash_entry *
1304 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
1305 bfd *abfd, const Elf_Internal_Rela *rel,
1308 struct elf_x86_64_link_hash_entry e, *ret;
1309 asection *sec = abfd->sections;
1310 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
1311 htab->r_sym (rel->r_info));
1314 e.elf.indx = sec->id;
1315 e.elf.dynstr_index = htab->r_sym (rel->r_info);
1316 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
1317 create ? INSERT : NO_INSERT);
1324 ret = (struct elf_x86_64_link_hash_entry *) *slot;
1328 ret = (struct elf_x86_64_link_hash_entry *)
1329 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
1330 sizeof (struct elf_x86_64_link_hash_entry));
1333 memset (ret, 0, sizeof (*ret));
1334 ret->elf.indx = sec->id;
1335 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
1336 ret->elf.dynindx = -1;
1337 ret->func_pointer_refcount = 0;
1338 ret->plt_got.offset = (bfd_vma) -1;
1344 /* Destroy an X86-64 ELF linker hash table. */
1347 elf_x86_64_link_hash_table_free (bfd *obfd)
1349 struct elf_x86_64_link_hash_table *htab
1350 = (struct elf_x86_64_link_hash_table *) obfd->link.hash;
1352 if (htab->loc_hash_table)
1353 htab_delete (htab->loc_hash_table);
1354 if (htab->loc_hash_memory)
1355 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1356 _bfd_elf_link_hash_table_free (obfd);
1359 /* Create an X86-64 ELF linker hash table. */
1361 static struct bfd_link_hash_table *
1362 elf_x86_64_link_hash_table_create (bfd *abfd)
1364 struct elf_x86_64_link_hash_table *ret;
1365 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
1367 ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt);
1371 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1372 elf_x86_64_link_hash_newfunc,
1373 sizeof (struct elf_x86_64_link_hash_entry),
1380 if (ABI_64_P (abfd))
1382 ret->r_info = elf64_r_info;
1383 ret->r_sym = elf64_r_sym;
1384 ret->pointer_r_type = R_X86_64_64;
1385 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
1386 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
1390 ret->r_info = elf32_r_info;
1391 ret->r_sym = elf32_r_sym;
1392 ret->pointer_r_type = R_X86_64_32;
1393 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1394 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
1397 ret->loc_hash_table = htab_try_create (1024,
1398 elf_x86_64_local_htab_hash,
1399 elf_x86_64_local_htab_eq,
1401 ret->loc_hash_memory = objalloc_create ();
1402 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1404 elf_x86_64_link_hash_table_free (abfd);
1407 ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free;
1409 return &ret->elf.root;
1412 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1415 elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1416 struct elf_link_hash_entry *dir,
1417 struct elf_link_hash_entry *ind)
1419 struct elf_x86_64_link_hash_entry *edir, *eind;
1421 edir = (struct elf_x86_64_link_hash_entry *) dir;
1422 eind = (struct elf_x86_64_link_hash_entry *) ind;
1424 edir->has_got_reloc |= eind->has_got_reloc;
1425 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1427 if (eind->dyn_relocs != NULL)
1429 if (edir->dyn_relocs != NULL)
1431 struct elf_dyn_relocs **pp;
1432 struct elf_dyn_relocs *p;
1434 /* Add reloc counts against the indirect sym to the direct sym
1435 list. Merge any entries against the same section. */
1436 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1438 struct elf_dyn_relocs *q;
1440 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1441 if (q->sec == p->sec)
1443 q->pc_count += p->pc_count;
1444 q->count += p->count;
1451 *pp = edir->dyn_relocs;
1454 edir->dyn_relocs = eind->dyn_relocs;
1455 eind->dyn_relocs = NULL;
1458 if (ind->root.type == bfd_link_hash_indirect
1459 && dir->got.refcount <= 0)
1461 edir->tls_type = eind->tls_type;
1462 eind->tls_type = GOT_UNKNOWN;
1465 if (ELIMINATE_COPY_RELOCS
1466 && ind->root.type != bfd_link_hash_indirect
1467 && dir->dynamic_adjusted)
1469 /* If called to transfer flags for a weakdef during processing
1470 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1471 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1472 if (dir->versioned != versioned_hidden)
1473 dir->ref_dynamic |= ind->ref_dynamic;
1474 dir->ref_regular |= ind->ref_regular;
1475 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1476 dir->needs_plt |= ind->needs_plt;
1477 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1481 if (eind->func_pointer_refcount > 0)
1483 edir->func_pointer_refcount += eind->func_pointer_refcount;
1484 eind->func_pointer_refcount = 0;
1487 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1492 elf64_x86_64_elf_object_p (bfd *abfd)
1494 /* Set the right machine number for an x86-64 elf64 file. */
1495 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
1500 elf32_x86_64_elf_object_p (bfd *abfd)
1502 /* Set the right machine number for an x86-64 elf32 file. */
1503 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1507 /* Return TRUE if the TLS access code sequence support transition
1511 elf_x86_64_check_tls_transition (bfd *abfd,
1512 struct bfd_link_info *info,
1515 Elf_Internal_Shdr *symtab_hdr,
1516 struct elf_link_hash_entry **sym_hashes,
1517 unsigned int r_type,
1518 const Elf_Internal_Rela *rel,
1519 const Elf_Internal_Rela *relend)
1522 unsigned long r_symndx;
1523 bfd_boolean largepic = FALSE;
1524 struct elf_link_hash_entry *h;
1526 struct elf_x86_64_link_hash_table *htab;
1528 bfd_boolean indirect_call;
1530 htab = elf_x86_64_hash_table (info);
1531 offset = rel->r_offset;
1534 case R_X86_64_TLSGD:
1535 case R_X86_64_TLSLD:
1536 if ((rel + 1) >= relend)
1539 if (r_type == R_X86_64_TLSGD)
1541 /* Check transition from GD access model. For 64bit, only
1542 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1543 .word 0x6666; rex64; call __tls_get_addr@PLT
1545 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1547 call *__tls_get_addr@GOTPCREL(%rip)
1548 which may be converted to
1549 addr32 call __tls_get_addr
1550 can transit to different access model. For 32bit, only
1551 leaq foo@tlsgd(%rip), %rdi
1552 .word 0x6666; rex64; call __tls_get_addr@PLT
1554 leaq foo@tlsgd(%rip), %rdi
1556 call *__tls_get_addr@GOTPCREL(%rip)
1557 which may be converted to
1558 addr32 call __tls_get_addr
1559 can transit to different access model. For largepic,
1561 leaq foo@tlsgd(%rip), %rdi
1562 movabsq $__tls_get_addr@pltoff, %rax
1566 leaq foo@tlsgd(%rip), %rdi
1567 movabsq $__tls_get_addr@pltoff, %rax
1571 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1573 if ((offset + 12) > sec->size)
1576 call = contents + offset + 4;
1578 || !((call[1] == 0x48
1586 && call[3] == 0xe8)))
1588 if (!ABI_64_P (abfd)
1589 || (offset + 19) > sec->size
1591 || memcmp (call - 7, leaq + 1, 3) != 0
1592 || memcmp (call, "\x48\xb8", 2) != 0
1596 || !((call[10] == 0x48 && call[12] == 0xd8)
1597 || (call[10] == 0x4c && call[12] == 0xf8)))
1601 else if (ABI_64_P (abfd))
1604 || memcmp (contents + offset - 4, leaq, 4) != 0)
1610 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
1613 indirect_call = call[2] == 0xff;
1617 /* Check transition from LD access model. Only
1618 leaq foo@tlsld(%rip), %rdi;
1619 call __tls_get_addr@PLT
1621 leaq foo@tlsld(%rip), %rdi;
1622 call *__tls_get_addr@GOTPCREL(%rip)
1623 which may be converted to
1624 addr32 call __tls_get_addr
1625 can transit to different access model. For largepic
1627 leaq foo@tlsld(%rip), %rdi
1628 movabsq $__tls_get_addr@pltoff, %rax
1632 leaq foo@tlsld(%rip), %rdi
1633 movabsq $__tls_get_addr@pltoff, %rax
1637 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
1639 if (offset < 3 || (offset + 9) > sec->size)
1642 if (memcmp (contents + offset - 3, lea, 3) != 0)
1645 call = contents + offset + 4;
1646 if (!(call[0] == 0xe8
1647 || (call[0] == 0xff && call[1] == 0x15)
1648 || (call[0] == 0x67 && call[1] == 0xe8)))
1650 if (!ABI_64_P (abfd)
1651 || (offset + 19) > sec->size
1652 || memcmp (call, "\x48\xb8", 2) != 0
1656 || !((call[10] == 0x48 && call[12] == 0xd8)
1657 || (call[10] == 0x4c && call[12] == 0xf8)))
1661 indirect_call = call[0] == 0xff;
1664 r_symndx = htab->r_sym (rel[1].r_info);
1665 if (r_symndx < symtab_hdr->sh_info)
1668 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1670 || !((struct elf_x86_64_link_hash_entry *) h)->tls_get_addr)
1673 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64;
1674 else if (indirect_call)
1675 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX;
1677 return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1678 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
1680 case R_X86_64_GOTTPOFF:
1681 /* Check transition from IE access model:
1682 mov foo@gottpoff(%rip), %reg
1683 add foo@gottpoff(%rip), %reg
1686 /* Check REX prefix first. */
1687 if (offset >= 3 && (offset + 4) <= sec->size)
1689 val = bfd_get_8 (abfd, contents + offset - 3);
1690 if (val != 0x48 && val != 0x4c)
1692 /* X32 may have 0x44 REX prefix or no REX prefix. */
1693 if (ABI_64_P (abfd))
1699 /* X32 may not have any REX prefix. */
1700 if (ABI_64_P (abfd))
1702 if (offset < 2 || (offset + 3) > sec->size)
1706 val = bfd_get_8 (abfd, contents + offset - 2);
1707 if (val != 0x8b && val != 0x03)
1710 val = bfd_get_8 (abfd, contents + offset - 1);
1711 return (val & 0xc7) == 5;
1713 case R_X86_64_GOTPC32_TLSDESC:
1714 /* Check transition from GDesc access model:
1715 leaq x@tlsdesc(%rip), %rax
1717 Make sure it's a leaq adding rip to a 32-bit offset
1718 into any register, although it's probably almost always
1721 if (offset < 3 || (offset + 4) > sec->size)
1724 val = bfd_get_8 (abfd, contents + offset - 3);
1725 if ((val & 0xfb) != 0x48)
1728 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1731 val = bfd_get_8 (abfd, contents + offset - 1);
1732 return (val & 0xc7) == 0x05;
1734 case R_X86_64_TLSDESC_CALL:
1735 /* Check transition from GDesc access model:
1736 call *x@tlsdesc(%rax)
1738 if (offset + 2 <= sec->size)
1740 /* Make sure that it's a call *x@tlsdesc(%rax). */
1741 call = contents + offset;
1742 return call[0] == 0xff && call[1] == 0x10;
1752 /* Return TRUE if the TLS access transition is OK or no transition
1753 will be performed. Update R_TYPE if there is a transition. */
1756 elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1757 asection *sec, bfd_byte *contents,
1758 Elf_Internal_Shdr *symtab_hdr,
1759 struct elf_link_hash_entry **sym_hashes,
1760 unsigned int *r_type, int tls_type,
1761 const Elf_Internal_Rela *rel,
1762 const Elf_Internal_Rela *relend,
1763 struct elf_link_hash_entry *h,
1764 unsigned long r_symndx,
1765 bfd_boolean from_relocate_section)
1767 unsigned int from_type = *r_type;
1768 unsigned int to_type = from_type;
1769 bfd_boolean check = TRUE;
1771 /* Skip TLS transition for functions. */
1773 && (h->type == STT_FUNC
1774 || h->type == STT_GNU_IFUNC))
1779 case R_X86_64_TLSGD:
1780 case R_X86_64_GOTPC32_TLSDESC:
1781 case R_X86_64_TLSDESC_CALL:
1782 case R_X86_64_GOTTPOFF:
1783 if (bfd_link_executable (info))
1786 to_type = R_X86_64_TPOFF32;
1788 to_type = R_X86_64_GOTTPOFF;
1791 /* When we are called from elf_x86_64_relocate_section, there may
1792 be additional transitions based on TLS_TYPE. */
1793 if (from_relocate_section)
1795 unsigned int new_to_type = to_type;
1797 if (bfd_link_executable (info)
1800 && tls_type == GOT_TLS_IE)
1801 new_to_type = R_X86_64_TPOFF32;
1803 if (to_type == R_X86_64_TLSGD
1804 || to_type == R_X86_64_GOTPC32_TLSDESC
1805 || to_type == R_X86_64_TLSDESC_CALL)
1807 if (tls_type == GOT_TLS_IE)
1808 new_to_type = R_X86_64_GOTTPOFF;
1811 /* We checked the transition before when we were called from
1812 elf_x86_64_check_relocs. We only want to check the new
1813 transition which hasn't been checked before. */
1814 check = new_to_type != to_type && from_type == to_type;
1815 to_type = new_to_type;
1820 case R_X86_64_TLSLD:
1821 if (bfd_link_executable (info))
1822 to_type = R_X86_64_TPOFF32;
1829 /* Return TRUE if there is no transition. */
1830 if (from_type == to_type)
1833 /* Check if the transition can be performed. */
1835 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1836 symtab_hdr, sym_hashes,
1837 from_type, rel, relend))
1839 reloc_howto_type *from, *to;
1842 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1843 to = elf_x86_64_rtype_to_howto (abfd, to_type);
1846 name = h->root.root.string;
1849 struct elf_x86_64_link_hash_table *htab;
1851 htab = elf_x86_64_hash_table (info);
1856 Elf_Internal_Sym *isym;
1858 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1860 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1865 /* xgettext:c-format */
1866 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1867 "in section `%A' failed"),
1868 abfd, from->name, to->name, name, rel->r_offset, sec);
1869 bfd_set_error (bfd_error_bad_value);
1877 /* Rename some of the generic section flags to better document how they
1879 #define need_convert_load sec_flg0
1880 #define check_relocs_failed sec_flg1
1883 elf_x86_64_need_pic (struct bfd_link_info *info,
1884 bfd *input_bfd, asection *sec,
1885 struct elf_link_hash_entry *h,
1886 Elf_Internal_Shdr *symtab_hdr,
1887 Elf_Internal_Sym *isym,
1888 reloc_howto_type *howto)
1891 const char *und = "";
1892 const char *pic = "";
1898 name = h->root.root.string;
1899 switch (ELF_ST_VISIBILITY (h->other))
1902 v = _("hidden symbol ");
1905 v = _("internal symbol ");
1908 v = _("protected symbol ");
1912 pic = _("; recompile with -fPIC");
1916 if (!h->def_regular && !h->def_dynamic)
1917 und = _("undefined ");
1921 name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL);
1922 pic = _("; recompile with -fPIC");
1925 if (bfd_link_dll (info))
1926 object = _("a shared object");
1927 else if (bfd_link_pie (info))
1928 object = _("a PIE object");
1930 object = _("a PDE object");
1932 /* xgettext:c-format */
1933 _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can "
1934 "not be used when making %s%s"),
1935 input_bfd, howto->name, und, v, name,
1937 bfd_set_error (bfd_error_bad_value);
1938 sec->check_relocs_failed = 1;
1942 /* With the local symbol, foo, we convert
1943 mov foo@GOTPCREL(%rip), %reg
1947 call/jmp *foo@GOTPCREL(%rip)
1949 nop call foo/jmp foo nop
1950 When PIC is false, convert
1951 test %reg, foo@GOTPCREL(%rip)
1955 binop foo@GOTPCREL(%rip), %reg
1958 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1962 elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec,
1964 Elf_Internal_Rela *irel,
1965 struct elf_link_hash_entry *h,
1966 bfd_boolean *converted,
1967 struct bfd_link_info *link_info)
1969 struct elf_x86_64_link_hash_table *htab;
1971 bfd_boolean require_reloc_pc32;
1973 bfd_boolean to_reloc_pc32;
1976 bfd_signed_vma raddend;
1977 unsigned int opcode;
1979 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
1980 unsigned int r_symndx;
1982 bfd_vma roff = irel->r_offset;
1984 if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))
1987 raddend = irel->r_addend;
1988 /* Addend for 32-bit PC-relative relocation must be -4. */
1992 htab = elf_x86_64_hash_table (link_info);
1993 is_pic = bfd_link_pic (link_info);
1995 relocx = (r_type == R_X86_64_GOTPCRELX
1996 || r_type == R_X86_64_REX_GOTPCRELX);
1998 /* TRUE if we can convert only to R_X86_64_PC32. Enable it for
2001 = link_info->disable_target_specific_optimizations > 1;
2003 r_symndx = htab->r_sym (irel->r_info);
2005 opcode = bfd_get_8 (abfd, contents + roff - 2);
2007 /* Convert mov to lea since it has been done for a while. */
2010 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
2011 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
2012 test, xor instructions. */
2017 /* We convert only to R_X86_64_PC32:
2019 2. R_X86_64_GOTPCREL since we can't modify REX byte.
2020 3. require_reloc_pc32 is true.
2023 to_reloc_pc32 = (opcode == 0xff
2025 || require_reloc_pc32
2028 /* Get the symbol referred to by the reloc. */
2031 Elf_Internal_Sym *isym
2032 = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx);
2034 /* Skip relocation against undefined symbols. */
2035 if (isym->st_shndx == SHN_UNDEF)
2038 symtype = ELF_ST_TYPE (isym->st_info);
2040 if (isym->st_shndx == SHN_ABS)
2041 tsec = bfd_abs_section_ptr;
2042 else if (isym->st_shndx == SHN_COMMON)
2043 tsec = bfd_com_section_ptr;
2044 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
2045 tsec = &_bfd_elf_large_com_section;
2047 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2049 toff = isym->st_value;
2053 /* Undefined weak symbol is only bound locally in executable
2054 and its reference is resolved as 0 without relocation
2055 overflow. We can only perform this optimization for
2056 GOTPCRELX relocations since we need to modify REX byte.
2057 It is OK convert mov with R_X86_64_GOTPCREL to
2059 if ((relocx || opcode == 0x8b)
2060 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info,
2062 elf_x86_64_hash_entry (h)))
2066 /* Skip for branch instructions since R_X86_64_PC32
2068 if (require_reloc_pc32)
2073 /* For non-branch instructions, we can convert to
2074 R_X86_64_32/R_X86_64_32S since we know if there
2076 to_reloc_pc32 = FALSE;
2079 /* Since we don't know the current PC when PIC is true,
2080 we can't convert to R_X86_64_PC32. */
2081 if (to_reloc_pc32 && is_pic)
2086 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
2087 ld.so may use its link-time address. */
2088 else if (h->start_stop
2090 || h->root.type == bfd_link_hash_defined
2091 || h->root.type == bfd_link_hash_defweak)
2092 && h != htab->elf.hdynamic
2093 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
2095 /* bfd_link_hash_new or bfd_link_hash_undefined is
2096 set by an assignment in a linker script in
2097 bfd_elf_record_link_assignment. start_stop is set
2098 on __start_SECNAME/__stop_SECNAME which mark section
2102 && (h->root.type == bfd_link_hash_new
2103 || h->root.type == bfd_link_hash_undefined
2104 || ((h->root.type == bfd_link_hash_defined
2105 || h->root.type == bfd_link_hash_defweak)
2106 && h->root.u.def.section == bfd_und_section_ptr))))
2108 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
2109 if (require_reloc_pc32)
2113 tsec = h->root.u.def.section;
2114 toff = h->root.u.def.value;
2121 /* Don't convert GOTPCREL relocation against large section. */
2122 if (elf_section_data (tsec) != NULL
2123 && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0)
2126 /* We can only estimate relocation overflow for R_X86_64_PC32. */
2130 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
2132 /* At this stage in linking, no SEC_MERGE symbol has been
2133 adjusted, so all references to such symbols need to be
2134 passed through _bfd_merged_section_offset. (Later, in
2135 relocate_section, all SEC_MERGE symbols *except* for
2136 section symbols have been adjusted.)
2138 gas may reduce relocations against symbols in SEC_MERGE
2139 sections to a relocation against the section symbol when
2140 the original addend was zero. When the reloc is against
2141 a section symbol we should include the addend in the
2142 offset passed to _bfd_merged_section_offset, since the
2143 location of interest is the original symbol. On the
2144 other hand, an access to "sym+addend" where "sym" is not
2145 a section symbol should not include the addend; Such an
2146 access is presumed to be an offset from "sym"; The
2147 location of interest is just "sym". */
2148 if (symtype == STT_SECTION)
2151 toff = _bfd_merged_section_offset (abfd, &tsec,
2152 elf_section_data (tsec)->sec_info,
2155 if (symtype != STT_SECTION)
2161 /* Don't convert if R_X86_64_PC32 relocation overflows. */
2162 if (tsec->output_section == sec->output_section)
2164 if ((toff - roff + 0x80000000) > 0xffffffff)
2169 bfd_signed_vma distance;
2171 /* At this point, we don't know the load addresses of TSEC
2172 section nor SEC section. We estimate the distrance between
2173 SEC and TSEC. We store the estimated distances in the
2174 compressed_size field of the output section, which is only
2175 used to decompress the compressed input section. */
2176 if (sec->output_section->compressed_size == 0)
2179 bfd_size_type size = 0;
2180 for (asect = link_info->output_bfd->sections;
2182 asect = asect->next)
2183 /* Skip debug sections since compressed_size is used to
2184 compress debug sections. */
2185 if ((asect->flags & SEC_DEBUGGING) == 0)
2188 for (i = asect->map_head.s;
2192 size = align_power (size, i->alignment_power);
2195 asect->compressed_size = size;
2199 /* Don't convert GOTPCREL relocations if TSEC isn't placed
2201 distance = (tsec->output_section->compressed_size
2202 - sec->output_section->compressed_size);
2206 /* Take PT_GNU_RELRO segment into account by adding
2208 if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize
2209 - roff + 0x80000000) > 0xffffffff)
2216 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
2221 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
2223 modrm = bfd_get_8 (abfd, contents + roff - 1);
2226 /* Convert to "jmp foo nop". */
2229 nop_offset = irel->r_offset + 3;
2230 disp = bfd_get_32 (abfd, contents + irel->r_offset);
2231 irel->r_offset -= 1;
2232 bfd_put_32 (abfd, disp, contents + irel->r_offset);
2236 struct elf_x86_64_link_hash_entry *eh
2237 = (struct elf_x86_64_link_hash_entry *) h;
2239 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
2242 /* To support TLS optimization, always use addr32 prefix for
2243 "call *__tls_get_addr@GOTPCREL(%rip)". */
2244 if (eh && eh->tls_get_addr)
2247 nop_offset = irel->r_offset - 2;
2251 nop = link_info->call_nop_byte;
2252 if (link_info->call_nop_as_suffix)
2254 nop_offset = irel->r_offset + 3;
2255 disp = bfd_get_32 (abfd, contents + irel->r_offset);
2256 irel->r_offset -= 1;
2257 bfd_put_32 (abfd, disp, contents + irel->r_offset);
2260 nop_offset = irel->r_offset - 2;
2263 bfd_put_8 (abfd, nop, contents + nop_offset);
2264 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
2265 r_type = R_X86_64_PC32;
2270 unsigned int rex_mask = REX_R;
2272 if (r_type == R_X86_64_REX_GOTPCRELX)
2273 rex = bfd_get_8 (abfd, contents + roff - 3);
2281 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
2282 "lea foo(%rip), %reg". */
2284 r_type = R_X86_64_PC32;
2288 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
2289 "mov $foo, %reg". */
2291 modrm = bfd_get_8 (abfd, contents + roff - 1);
2292 modrm = 0xc0 | (modrm & 0x38) >> 3;
2293 if ((rex & REX_W) != 0
2294 && ABI_64_P (link_info->output_bfd))
2296 /* Keep the REX_W bit in REX byte for LP64. */
2297 r_type = R_X86_64_32S;
2298 goto rewrite_modrm_rex;
2302 /* If the REX_W bit in REX byte isn't needed,
2303 use R_X86_64_32 and clear the W bit to avoid
2304 sign-extend imm32 to imm64. */
2305 r_type = R_X86_64_32;
2306 /* Clear the W bit in REX byte. */
2308 goto rewrite_modrm_rex;
2314 /* R_X86_64_PC32 isn't supported. */
2318 modrm = bfd_get_8 (abfd, contents + roff - 1);
2321 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
2322 "test $foo, %reg". */
2323 modrm = 0xc0 | (modrm & 0x38) >> 3;
2328 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
2329 "binop $foo, %reg". */
2330 modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c);
2334 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
2335 overflow when sign-extending imm32 to imm64. */
2336 r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32;
2339 bfd_put_8 (abfd, modrm, contents + roff - 1);
2343 /* Move the R bit to the B bit in REX byte. */
2344 rex = (rex & ~rex_mask) | (rex & REX_R) >> 2;
2345 bfd_put_8 (abfd, rex, contents + roff - 3);
2348 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
2352 bfd_put_8 (abfd, opcode, contents + roff - 2);
2355 irel->r_info = htab->r_info (r_symndx, r_type);
2362 /* Look through the relocs for a section during the first phase, and
2363 calculate needed space in the global offset table, procedure
2364 linkage table, and dynamic reloc sections. */
2367 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
2369 const Elf_Internal_Rela *relocs)
2371 struct elf_x86_64_link_hash_table *htab;
2372 Elf_Internal_Shdr *symtab_hdr;
2373 struct elf_link_hash_entry **sym_hashes;
2374 const Elf_Internal_Rela *rel;
2375 const Elf_Internal_Rela *rel_end;
2379 if (bfd_link_relocatable (info))
2382 /* Don't do anything special with non-loaded, non-alloced sections.
2383 In particular, any relocs in such sections should not affect GOT
2384 and PLT reference counting (ie. we don't allow them to create GOT
2385 or PLT entries), there's no possibility or desire to optimize TLS
2386 relocs, and there's not much point in propagating relocs to shared
2387 libs that the dynamic linker won't relocate. */
2388 if ((sec->flags & SEC_ALLOC) == 0)
2391 BFD_ASSERT (is_x86_64_elf (abfd));
2393 htab = elf_x86_64_hash_table (info);
2396 sec->check_relocs_failed = 1;
2400 /* Get the section contents. */
2401 if (elf_section_data (sec)->this_hdr.contents != NULL)
2402 contents = elf_section_data (sec)->this_hdr.contents;
2403 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2405 sec->check_relocs_failed = 1;
2409 symtab_hdr = &elf_symtab_hdr (abfd);
2410 sym_hashes = elf_sym_hashes (abfd);
2414 rel_end = relocs + sec->reloc_count;
2415 for (rel = relocs; rel < rel_end; rel++)
2417 unsigned int r_type;
2418 unsigned int r_symndx;
2419 struct elf_link_hash_entry *h;
2420 struct elf_x86_64_link_hash_entry *eh;
2421 Elf_Internal_Sym *isym;
2423 bfd_boolean size_reloc;
2425 r_symndx = htab->r_sym (rel->r_info);
2426 r_type = ELF32_R_TYPE (rel->r_info);
2428 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
2430 /* xgettext:c-format */
2431 _bfd_error_handler (_("%B: bad symbol index: %d"),
2436 if (r_symndx < symtab_hdr->sh_info)
2438 /* A local symbol. */
2439 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2444 /* Check relocation against local STT_GNU_IFUNC symbol. */
2445 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2447 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
2452 /* Fake a STT_GNU_IFUNC symbol. */
2453 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
2455 h->type = STT_GNU_IFUNC;
2458 h->forced_local = 1;
2459 h->root.type = bfd_link_hash_defined;
2467 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2468 while (h->root.type == bfd_link_hash_indirect
2469 || h->root.type == bfd_link_hash_warning)
2470 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2473 /* Check invalid x32 relocations. */
2474 if (!ABI_64_P (abfd))
2480 case R_X86_64_DTPOFF64:
2481 case R_X86_64_TPOFF64:
2483 case R_X86_64_GOTOFF64:
2484 case R_X86_64_GOT64:
2485 case R_X86_64_GOTPCREL64:
2486 case R_X86_64_GOTPC64:
2487 case R_X86_64_GOTPLT64:
2488 case R_X86_64_PLTOFF64:
2491 name = h->root.root.string;
2493 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
2496 /* xgettext:c-format */
2497 (_("%B: relocation %s against symbol `%s' isn't "
2498 "supported in x32 mode"), abfd,
2499 x86_64_elf_howto_table[r_type].name, name);
2500 bfd_set_error (bfd_error_bad_value);
2508 /* It is referenced by a non-shared object. */
2510 h->root.non_ir_ref_regular = 1;
2512 if (h->type == STT_GNU_IFUNC)
2513 elf_tdata (info->output_bfd)->has_gnu_symbols
2514 |= elf_gnu_symbol_ifunc;
2517 if (! elf_x86_64_tls_transition (info, abfd, sec, contents,
2518 symtab_hdr, sym_hashes,
2519 &r_type, GOT_UNKNOWN,
2520 rel, rel_end, h, r_symndx, FALSE))
2523 eh = (struct elf_x86_64_link_hash_entry *) h;
2526 case R_X86_64_TLSLD:
2527 htab->tls_ld_got.refcount += 1;
2530 case R_X86_64_TPOFF32:
2531 if (!bfd_link_executable (info) && ABI_64_P (abfd))
2532 return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym,
2533 &x86_64_elf_howto_table[r_type]);
2535 eh->has_got_reloc = 1;
2538 case R_X86_64_GOTTPOFF:
2539 if (!bfd_link_executable (info))
2540 info->flags |= DF_STATIC_TLS;
2543 case R_X86_64_GOT32:
2544 case R_X86_64_GOTPCREL:
2545 case R_X86_64_GOTPCRELX:
2546 case R_X86_64_REX_GOTPCRELX:
2547 case R_X86_64_TLSGD:
2548 case R_X86_64_GOT64:
2549 case R_X86_64_GOTPCREL64:
2550 case R_X86_64_GOTPLT64:
2551 case R_X86_64_GOTPC32_TLSDESC:
2552 case R_X86_64_TLSDESC_CALL:
2553 /* This symbol requires a global offset table entry. */
2555 int tls_type, old_tls_type;
2559 default: tls_type = GOT_NORMAL; break;
2560 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
2561 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
2562 case R_X86_64_GOTPC32_TLSDESC:
2563 case R_X86_64_TLSDESC_CALL:
2564 tls_type = GOT_TLS_GDESC; break;
2569 h->got.refcount += 1;
2570 old_tls_type = eh->tls_type;
2574 bfd_signed_vma *local_got_refcounts;
2576 /* This is a global offset table entry for a local symbol. */
2577 local_got_refcounts = elf_local_got_refcounts (abfd);
2578 if (local_got_refcounts == NULL)
2582 size = symtab_hdr->sh_info;
2583 size *= sizeof (bfd_signed_vma)
2584 + sizeof (bfd_vma) + sizeof (char);
2585 local_got_refcounts = ((bfd_signed_vma *)
2586 bfd_zalloc (abfd, size));
2587 if (local_got_refcounts == NULL)
2589 elf_local_got_refcounts (abfd) = local_got_refcounts;
2590 elf_x86_64_local_tlsdesc_gotent (abfd)
2591 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2592 elf_x86_64_local_got_tls_type (abfd)
2593 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2595 local_got_refcounts[r_symndx] += 1;
2597 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
2600 /* If a TLS symbol is accessed using IE at least once,
2601 there is no point to use dynamic model for it. */
2602 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2603 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2604 || tls_type != GOT_TLS_IE))
2606 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
2607 tls_type = old_tls_type;
2608 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2609 && GOT_TLS_GD_ANY_P (tls_type))
2610 tls_type |= old_tls_type;
2614 name = h->root.root.string;
2616 name = bfd_elf_sym_name (abfd, symtab_hdr,
2619 /* xgettext:c-format */
2620 (_("%B: '%s' accessed both as normal and"
2621 " thread local symbol"),
2623 bfd_set_error (bfd_error_bad_value);
2628 if (old_tls_type != tls_type)
2631 eh->tls_type = tls_type;
2633 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
2638 case R_X86_64_GOTOFF64:
2639 case R_X86_64_GOTPC32:
2640 case R_X86_64_GOTPC64:
2643 eh->has_got_reloc = 1;
2646 case R_X86_64_PLT32:
2647 case R_X86_64_PLT32_BND:
2648 /* This symbol requires a procedure linkage table entry. We
2649 actually build the entry in adjust_dynamic_symbol,
2650 because this might be a case of linking PIC code which is
2651 never referenced by a dynamic object, in which case we
2652 don't need to generate a procedure linkage table entry
2655 /* If this is a local symbol, we resolve it directly without
2656 creating a procedure linkage table entry. */
2660 eh->has_got_reloc = 1;
2662 h->plt.refcount += 1;
2665 case R_X86_64_PLTOFF64:
2666 /* This tries to form the 'address' of a function relative
2667 to GOT. For global symbols we need a PLT entry. */
2671 h->plt.refcount += 1;
2675 case R_X86_64_SIZE32:
2676 case R_X86_64_SIZE64:
2681 if (!ABI_64_P (abfd))
2687 /* Check relocation overflow as these relocs may lead to
2688 run-time relocation overflow. Don't error out for
2689 sections we don't care about, such as debug sections or
2690 when relocation overflow check is disabled. */
2691 if (!info->no_reloc_overflow_check
2692 && (bfd_link_pic (info)
2693 || (bfd_link_executable (info)
2697 && (sec->flags & SEC_READONLY) == 0)))
2698 return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym,
2699 &x86_64_elf_howto_table[r_type]);
2705 case R_X86_64_PC32_BND:
2709 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2710 eh->has_non_got_reloc = 1;
2711 /* We are called after all symbols have been resolved. Only
2712 relocation against STT_GNU_IFUNC symbol must go through
2715 && (bfd_link_executable (info)
2716 || h->type == STT_GNU_IFUNC))
2718 /* If this reloc is in a read-only section, we might
2719 need a copy reloc. We can't check reliably at this
2720 stage whether the section is read-only, as input
2721 sections have not yet been mapped to output sections.
2722 Tentatively set the flag for now, and correct in
2723 adjust_dynamic_symbol. */
2726 /* We may need a .plt entry if the symbol is a function
2727 defined in a shared lib or is a STT_GNU_IFUNC function
2728 referenced from the code or read-only section. */
2730 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
2731 h->plt.refcount += 1;
2733 if (r_type == R_X86_64_PC32)
2735 /* Since something like ".long foo - ." may be used
2736 as pointer, make sure that PLT is used if foo is
2737 a function defined in a shared library. */
2738 if ((sec->flags & SEC_CODE) == 0)
2739 h->pointer_equality_needed = 1;
2741 else if (r_type != R_X86_64_PC32_BND
2742 && r_type != R_X86_64_PC64)
2744 h->pointer_equality_needed = 1;
2745 /* At run-time, R_X86_64_64 can be resolved for both
2746 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2747 can only be resolved for x32. */
2748 if ((sec->flags & SEC_READONLY) == 0
2749 && (r_type == R_X86_64_64
2750 || (!ABI_64_P (abfd)
2751 && (r_type == R_X86_64_32
2752 || r_type == R_X86_64_32S))))
2753 eh->func_pointer_refcount += 1;
2759 /* If we are creating a shared library, and this is a reloc
2760 against a global symbol, or a non PC relative reloc
2761 against a local symbol, then we need to copy the reloc
2762 into the shared library. However, if we are linking with
2763 -Bsymbolic, we do not need to copy a reloc against a
2764 global symbol which is defined in an object we are
2765 including in the link (i.e., DEF_REGULAR is set). At
2766 this point we have not seen all the input files, so it is
2767 possible that DEF_REGULAR is not set now but will be set
2768 later (it is never cleared). In case of a weak definition,
2769 DEF_REGULAR may be cleared later by a strong definition in
2770 a shared library. We account for that possibility below by
2771 storing information in the relocs_copied field of the hash
2772 table entry. A similar situation occurs when creating
2773 shared libraries and symbol visibility changes render the
2776 If on the other hand, we are creating an executable, we
2777 may need to keep relocations for symbols satisfied by a
2778 dynamic library if we manage to avoid copy relocs for the
2781 Generate dynamic pointer relocation against STT_GNU_IFUNC
2782 symbol in the non-code section. */
2783 if ((bfd_link_pic (info)
2784 && (! IS_X86_64_PCREL_TYPE (r_type)
2786 && (! (bfd_link_pie (info)
2787 || SYMBOLIC_BIND (info, h))
2788 || h->root.type == bfd_link_hash_defweak
2789 || !h->def_regular))))
2791 && h->type == STT_GNU_IFUNC
2792 && r_type == htab->pointer_r_type
2793 && (sec->flags & SEC_CODE) == 0)
2794 || (ELIMINATE_COPY_RELOCS
2795 && !bfd_link_pic (info)
2797 && (h->root.type == bfd_link_hash_defweak
2798 || !h->def_regular)))
2800 struct elf_dyn_relocs *p;
2801 struct elf_dyn_relocs **head;
2803 /* We must copy these reloc types into the output file.
2804 Create a reloc section in dynobj and make room for
2808 sreloc = _bfd_elf_make_dynamic_reloc_section
2809 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
2810 abfd, /*rela?*/ TRUE);
2816 /* If this is a global symbol, we count the number of
2817 relocations we need for this symbol. */
2819 head = &eh->dyn_relocs;
2822 /* Track dynamic relocs needed for local syms too.
2823 We really need local syms available to do this
2828 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2833 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2837 /* Beware of type punned pointers vs strict aliasing
2839 vpp = &(elf_section_data (s)->local_dynrel);
2840 head = (struct elf_dyn_relocs **)vpp;
2844 if (p == NULL || p->sec != sec)
2846 bfd_size_type amt = sizeof *p;
2848 p = ((struct elf_dyn_relocs *)
2849 bfd_alloc (htab->elf.dynobj, amt));
2860 /* Count size relocation as PC-relative relocation. */
2861 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
2866 /* This relocation describes the C++ object vtable hierarchy.
2867 Reconstruct it for later use during GC. */
2868 case R_X86_64_GNU_VTINHERIT:
2869 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2873 /* This relocation describes which C++ vtable entries are actually
2874 used. Record for later use during GC. */
2875 case R_X86_64_GNU_VTENTRY:
2876 BFD_ASSERT (h != NULL);
2878 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2886 if ((r_type == R_X86_64_GOTPCREL
2887 || r_type == R_X86_64_GOTPCRELX
2888 || r_type == R_X86_64_REX_GOTPCRELX)
2889 && (h == NULL || h->type != STT_GNU_IFUNC))
2890 sec->need_convert_load = 1;
2893 if (elf_section_data (sec)->this_hdr.contents != contents)
2895 if (!info->keep_memory)
2899 /* Cache the section contents for elf_link_input_bfd. */
2900 elf_section_data (sec)->this_hdr.contents = contents;
2907 if (elf_section_data (sec)->this_hdr.contents != contents)
2909 sec->check_relocs_failed = 1;
2913 /* Return the section that should be marked against GC for a given
2917 elf_x86_64_gc_mark_hook (asection *sec,
2918 struct bfd_link_info *info,
2919 Elf_Internal_Rela *rel,
2920 struct elf_link_hash_entry *h,
2921 Elf_Internal_Sym *sym)
2924 switch (ELF32_R_TYPE (rel->r_info))
2926 case R_X86_64_GNU_VTINHERIT:
2927 case R_X86_64_GNU_VTENTRY:
2931 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2934 /* Remove undefined weak symbol from the dynamic symbol table if it
2935 is resolved to 0. */
2938 elf_x86_64_fixup_symbol (struct bfd_link_info *info,
2939 struct elf_link_hash_entry *h)
2941 if (h->dynindx != -1
2942 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2943 elf_x86_64_hash_entry (h)->has_got_reloc,
2944 elf_x86_64_hash_entry (h)))
2947 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2953 /* Adjust a symbol defined by a dynamic object and referenced by a
2954 regular object. The current definition is in some section of the
2955 dynamic object, but we're not including those sections. We have to
2956 change the definition to something the rest of the link can
2960 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2961 struct elf_link_hash_entry *h)
2963 struct elf_x86_64_link_hash_table *htab;
2965 struct elf_x86_64_link_hash_entry *eh;
2966 struct elf_dyn_relocs *p;
2968 /* STT_GNU_IFUNC symbol must go through PLT. */
2969 if (h->type == STT_GNU_IFUNC)
2971 /* All local STT_GNU_IFUNC references must be treate as local
2972 calls via local PLT. */
2974 && SYMBOL_CALLS_LOCAL (info, h))
2976 bfd_size_type pc_count = 0, count = 0;
2977 struct elf_dyn_relocs **pp;
2979 eh = (struct elf_x86_64_link_hash_entry *) h;
2980 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2982 pc_count += p->pc_count;
2983 p->count -= p->pc_count;
2992 if (pc_count || count)
2997 /* Increment PLT reference count only for PC-relative
3000 if (h->plt.refcount <= 0)
3001 h->plt.refcount = 1;
3003 h->plt.refcount += 1;
3008 if (h->plt.refcount <= 0)
3010 h->plt.offset = (bfd_vma) -1;
3016 /* If this is a function, put it in the procedure linkage table. We
3017 will fill in the contents of the procedure linkage table later,
3018 when we know the address of the .got section. */
3019 if (h->type == STT_FUNC
3022 if (h->plt.refcount <= 0
3023 || SYMBOL_CALLS_LOCAL (info, h)
3024 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3025 && h->root.type == bfd_link_hash_undefweak))
3027 /* This case can occur if we saw a PLT32 reloc in an input
3028 file, but the symbol was never referred to by a dynamic
3029 object, or if all references were garbage collected. In
3030 such a case, we don't actually need to build a procedure
3031 linkage table, and we can just do a PC32 reloc instead. */
3032 h->plt.offset = (bfd_vma) -1;
3039 /* It's possible that we incorrectly decided a .plt reloc was
3040 needed for an R_X86_64_PC32 reloc to a non-function sym in
3041 check_relocs. We can't decide accurately between function and
3042 non-function syms in check-relocs; Objects loaded later in
3043 the link may change h->type. So fix it now. */
3044 h->plt.offset = (bfd_vma) -1;
3046 /* If this is a weak symbol, and there is a real definition, the
3047 processor independent code will have arranged for us to see the
3048 real definition first, and we can just use the same value. */
3049 if (h->u.weakdef != NULL)
3051 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3052 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3053 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3054 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3055 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
3057 eh = (struct elf_x86_64_link_hash_entry *) h;
3058 h->non_got_ref = h->u.weakdef->non_got_ref;
3059 eh->needs_copy = h->u.weakdef->needs_copy;
3064 /* This is a reference to a symbol defined by a dynamic object which
3065 is not a function. */
3067 /* If we are creating a shared library, we must presume that the
3068 only references to the symbol are via the global offset table.
3069 For such cases we need not do anything here; the relocations will
3070 be handled correctly by relocate_section. */
3071 if (!bfd_link_executable (info))
3074 /* If there are no references to this symbol that do not use the
3075 GOT, we don't need to generate a copy reloc. */
3076 if (!h->non_got_ref)
3079 /* If -z nocopyreloc was given, we won't generate them either. */
3080 if (info->nocopyreloc)
3086 if (ELIMINATE_COPY_RELOCS)
3088 eh = (struct elf_x86_64_link_hash_entry *) h;
3089 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3091 s = p->sec->output_section;
3092 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3096 /* If we didn't find any dynamic relocs in read-only sections, then
3097 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3105 /* We must allocate the symbol in our .dynbss section, which will
3106 become part of the .bss section of the executable. There will be
3107 an entry for this symbol in the .dynsym section. The dynamic
3108 object will contain position independent code, so all references
3109 from the dynamic object to this symbol will go through the global
3110 offset table. The dynamic linker will use the .dynsym entry to
3111 determine the address it must put in the global offset table, so
3112 both the dynamic object and the regular object will refer to the
3113 same memory location for the variable. */
3115 htab = elf_x86_64_hash_table (info);
3119 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
3120 to copy the initial value out of the dynamic object and into the
3121 runtime process image. */
3122 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
3124 s = htab->elf.sdynrelro;
3125 srel = htab->elf.sreldynrelro;
3129 s = htab->elf.sdynbss;
3130 srel = htab->elf.srelbss;
3132 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3134 const struct elf_backend_data *bed;
3135 bed = get_elf_backend_data (info->output_bfd);
3136 srel->size += bed->s->sizeof_rela;
3140 return _bfd_elf_adjust_dynamic_copy (info, h, s);
3143 /* Allocate space in .plt, .got and associated reloc sections for
3147 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
3149 struct bfd_link_info *info;
3150 struct elf_x86_64_link_hash_table *htab;
3151 struct elf_x86_64_link_hash_entry *eh;
3152 struct elf_dyn_relocs *p;
3153 const struct elf_backend_data *bed;
3154 unsigned int plt_entry_size;
3155 bfd_boolean resolved_to_zero;
3157 if (h->root.type == bfd_link_hash_indirect)
3160 eh = (struct elf_x86_64_link_hash_entry *) h;
3162 info = (struct bfd_link_info *) inf;
3163 htab = elf_x86_64_hash_table (info);
3166 bed = get_elf_backend_data (info->output_bfd);
3167 plt_entry_size = htab->plt.plt_entry_size;
3169 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
3173 /* We can't use the GOT PLT if pointer equality is needed since
3174 finish_dynamic_symbol won't clear symbol value and the dynamic
3175 linker won't update the GOT slot. We will get into an infinite
3176 loop at run-time. */
3177 if (htab->plt_got != NULL
3178 && h->type != STT_GNU_IFUNC
3179 && !h->pointer_equality_needed
3180 && h->plt.refcount > 0
3181 && h->got.refcount > 0)
3183 /* Don't use the regular PLT if there are both GOT and GOTPLT
3185 h->plt.offset = (bfd_vma) -1;
3187 /* Use the GOT PLT. */
3188 eh->plt_got.refcount = 1;
3191 /* Clear the reference count of function pointer relocations if
3192 symbol isn't a normal function. */
3193 if (h->type != STT_FUNC)
3194 eh->func_pointer_refcount = 0;
3196 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
3197 here if it is defined and referenced in a non-shared object. */
3198 if (h->type == STT_GNU_IFUNC
3201 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
3203 &htab->readonly_dynrelocs_against_ifunc,
3207 GOT_ENTRY_SIZE, TRUE))
3209 asection *s = htab->plt_second;
3210 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
3212 /* Use the second PLT section if it is created. */
3213 eh->plt_second.offset = s->size;
3215 /* Make room for this entry in the second PLT section. */
3216 s->size += htab->non_lazy_plt->plt_entry_size;
3224 /* Don't create the PLT entry if there are only function pointer
3225 relocations which can be resolved at run-time. */
3226 else if (htab->elf.dynamic_sections_created
3227 && (h->plt.refcount > eh->func_pointer_refcount
3228 || eh->plt_got.refcount > 0))
3230 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
3232 /* Clear the reference count of function pointer relocations
3234 eh->func_pointer_refcount = 0;
3236 /* Make sure this symbol is output as a dynamic symbol.
3237 Undefined weak syms won't yet be marked as dynamic. */
3238 if (h->dynindx == -1
3240 && !resolved_to_zero
3241 && h->root.type == bfd_link_hash_undefweak)
3243 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3247 if (bfd_link_pic (info)
3248 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3250 asection *s = htab->elf.splt;
3251 asection *second_s = htab->plt_second;
3252 asection *got_s = htab->plt_got;
3254 /* If this is the first .plt entry, make room for the special
3255 first entry. The .plt section is used by prelink to undo
3256 prelinking for dynamic relocations. */
3258 s->size = htab->plt.has_plt0 * plt_entry_size;
3261 eh->plt_got.offset = got_s->size;
3264 h->plt.offset = s->size;
3266 eh->plt_second.offset = second_s->size;
3269 /* If this symbol is not defined in a regular file, and we are
3270 not generating a shared library, then set the symbol to this
3271 location in the .plt. This is required to make function
3272 pointers compare as equal between the normal executable and
3273 the shared library. */
3274 if (! bfd_link_pic (info)
3279 /* We need to make a call to the entry of the GOT PLT
3280 instead of regular PLT entry. */
3281 h->root.u.def.section = got_s;
3282 h->root.u.def.value = eh->plt_got.offset;
3288 /* We need to make a call to the entry of the
3289 second PLT instead of regular PLT entry. */
3290 h->root.u.def.section = second_s;
3291 h->root.u.def.value = eh->plt_second.offset;
3295 h->root.u.def.section = s;
3296 h->root.u.def.value = h->plt.offset;
3301 /* Make room for this entry. */
3303 got_s->size += htab->non_lazy_plt->plt_entry_size;
3306 s->size += plt_entry_size;
3308 second_s->size += htab->non_lazy_plt->plt_entry_size;
3310 /* We also need to make an entry in the .got.plt section,
3311 which will be placed in the .got section by the linker
3313 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
3315 /* There should be no PLT relocation against resolved
3316 undefined weak symbol in executable. */
3317 if (!resolved_to_zero)
3319 /* We also need to make an entry in the .rela.plt
3321 htab->elf.srelplt->size += bed->s->sizeof_rela;
3322 htab->elf.srelplt->reloc_count++;
3328 eh->plt_got.offset = (bfd_vma) -1;
3329 h->plt.offset = (bfd_vma) -1;
3335 eh->plt_got.offset = (bfd_vma) -1;
3336 h->plt.offset = (bfd_vma) -1;
3340 eh->tlsdesc_got = (bfd_vma) -1;
3342 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
3343 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
3344 if (h->got.refcount > 0
3345 && bfd_link_executable (info)
3347 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
3349 h->got.offset = (bfd_vma) -1;
3351 else if (h->got.refcount > 0)
3355 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
3357 /* Make sure this symbol is output as a dynamic symbol.
3358 Undefined weak syms won't yet be marked as dynamic. */
3359 if (h->dynindx == -1
3361 && !resolved_to_zero
3362 && h->root.type == bfd_link_hash_undefweak)
3364 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3368 if (GOT_TLS_GDESC_P (tls_type))
3370 eh->tlsdesc_got = htab->elf.sgotplt->size
3371 - elf_x86_64_compute_jump_table_size (htab);
3372 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3373 h->got.offset = (bfd_vma) -2;
3375 if (! GOT_TLS_GDESC_P (tls_type)
3376 || GOT_TLS_GD_P (tls_type))
3379 h->got.offset = s->size;
3380 s->size += GOT_ENTRY_SIZE;
3381 if (GOT_TLS_GD_P (tls_type))
3382 s->size += GOT_ENTRY_SIZE;
3384 dyn = htab->elf.dynamic_sections_created;
3385 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
3386 and two if global. R_X86_64_GOTTPOFF needs one dynamic
3387 relocation. No dynamic relocation against resolved undefined
3388 weak symbol in executable. */
3389 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
3390 || tls_type == GOT_TLS_IE)
3391 htab->elf.srelgot->size += bed->s->sizeof_rela;
3392 else if (GOT_TLS_GD_P (tls_type))
3393 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
3394 else if (! GOT_TLS_GDESC_P (tls_type)
3395 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3396 && !resolved_to_zero)
3397 || h->root.type != bfd_link_hash_undefweak)
3398 && (bfd_link_pic (info)
3399 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
3400 htab->elf.srelgot->size += bed->s->sizeof_rela;
3401 if (GOT_TLS_GDESC_P (tls_type))
3403 htab->elf.srelplt->size += bed->s->sizeof_rela;
3404 htab->tlsdesc_plt = (bfd_vma) -1;
3408 h->got.offset = (bfd_vma) -1;
3410 if (eh->dyn_relocs == NULL)
3413 /* In the shared -Bsymbolic case, discard space allocated for
3414 dynamic pc-relative relocs against symbols which turn out to be
3415 defined in regular objects. For the normal shared case, discard
3416 space for pc-relative relocs that have become local due to symbol
3417 visibility changes. */
3419 if (bfd_link_pic (info))
3421 /* Relocs that use pc_count are those that appear on a call
3422 insn, or certain REL relocs that can generated via assembly.
3423 We want calls to protected symbols to resolve directly to the
3424 function rather than going via the plt. If people want
3425 function pointer comparisons to work as expected then they
3426 should avoid writing weird assembly. */
3427 if (SYMBOL_CALLS_LOCAL (info, h))
3429 struct elf_dyn_relocs **pp;
3431 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3433 p->count -= p->pc_count;
3442 /* Also discard relocs on undefined weak syms with non-default
3443 visibility or in PIE. */
3444 if (eh->dyn_relocs != NULL)
3446 if (h->root.type == bfd_link_hash_undefweak)
3448 /* Undefined weak symbol is never bound locally in shared
3450 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3451 || resolved_to_zero)
3452 eh->dyn_relocs = NULL;
3453 else if (h->dynindx == -1
3454 && ! h->forced_local
3455 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3458 /* For PIE, discard space for pc-relative relocs against
3459 symbols which turn out to need copy relocs. */
3460 else if (bfd_link_executable (info)
3461 && (h->needs_copy || eh->needs_copy)
3465 struct elf_dyn_relocs **pp;
3467 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3469 if (p->pc_count != 0)
3477 else if (ELIMINATE_COPY_RELOCS)
3479 /* For the non-shared case, discard space for relocs against
3480 symbols which turn out to need copy relocs or are not
3481 dynamic. Keep dynamic relocations for run-time function
3482 pointer initialization. */
3484 if ((!h->non_got_ref
3485 || eh->func_pointer_refcount > 0
3486 || (h->root.type == bfd_link_hash_undefweak
3487 && !resolved_to_zero))
3490 || (htab->elf.dynamic_sections_created
3491 && (h->root.type == bfd_link_hash_undefweak
3492 || h->root.type == bfd_link_hash_undefined))))
3494 /* Make sure this symbol is output as a dynamic symbol.
3495 Undefined weak syms won't yet be marked as dynamic. */
3496 if (h->dynindx == -1
3497 && ! h->forced_local
3498 && ! resolved_to_zero
3499 && h->root.type == bfd_link_hash_undefweak
3500 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3503 /* If that succeeded, we know we'll be keeping all the
3505 if (h->dynindx != -1)
3509 eh->dyn_relocs = NULL;
3510 eh->func_pointer_refcount = 0;
3515 /* Finally, allocate space. */
3516 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3520 sreloc = elf_section_data (p->sec)->sreloc;
3522 BFD_ASSERT (sreloc != NULL);
3524 sreloc->size += p->count * bed->s->sizeof_rela;
3530 /* Allocate space in .plt, .got and associated reloc sections for
3531 local dynamic relocs. */
3534 elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
3536 struct elf_link_hash_entry *h
3537 = (struct elf_link_hash_entry *) *slot;
3539 if (h->type != STT_GNU_IFUNC
3543 || h->root.type != bfd_link_hash_defined)
3546 return elf_x86_64_allocate_dynrelocs (h, inf);
3549 /* Find any dynamic relocs that apply to read-only sections. */
3552 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
3555 struct elf_x86_64_link_hash_entry *eh;
3556 struct elf_dyn_relocs *p;
3558 /* Skip local IFUNC symbols. */
3559 if (h->forced_local && h->type == STT_GNU_IFUNC)
3562 eh = (struct elf_x86_64_link_hash_entry *) h;
3563 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3565 asection *s = p->sec->output_section;
3567 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3569 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3571 info->flags |= DF_TEXTREL;
3573 if ((info->warn_shared_textrel && bfd_link_pic (info))
3574 || info->error_textrel)
3575 /* xgettext:c-format */
3576 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3577 p->sec->owner, h->root.root.string,
3580 /* Not an error, just cut short the traversal. */
3587 /* Convert load via the GOT slot to load immediate. */
3590 elf_x86_64_convert_load (bfd *abfd, asection *sec,
3591 struct bfd_link_info *link_info)
3593 Elf_Internal_Shdr *symtab_hdr;
3594 Elf_Internal_Rela *internal_relocs;
3595 Elf_Internal_Rela *irel, *irelend;
3597 struct elf_x86_64_link_hash_table *htab;
3598 bfd_boolean changed;
3599 bfd_signed_vma *local_got_refcounts;
3601 /* Don't even try to convert non-ELF outputs. */
3602 if (!is_elf_hash_table (link_info->hash))
3605 /* Nothing to do if there is no need or no output. */
3606 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
3607 || sec->need_convert_load == 0
3608 || bfd_is_abs_section (sec->output_section))
3611 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3613 /* Load the relocations for this section. */
3614 internal_relocs = (_bfd_elf_link_read_relocs
3615 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3616 link_info->keep_memory));
3617 if (internal_relocs == NULL)
3621 htab = elf_x86_64_hash_table (link_info);
3622 local_got_refcounts = elf_local_got_refcounts (abfd);
3624 /* Get the section contents. */
3625 if (elf_section_data (sec)->this_hdr.contents != NULL)
3626 contents = elf_section_data (sec)->this_hdr.contents;
3629 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3633 irelend = internal_relocs + sec->reloc_count;
3634 for (irel = internal_relocs; irel < irelend; irel++)
3636 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3637 unsigned int r_symndx;
3638 struct elf_link_hash_entry *h;
3639 bfd_boolean converted;
3641 if (r_type != R_X86_64_GOTPCRELX
3642 && r_type != R_X86_64_REX_GOTPCRELX
3643 && r_type != R_X86_64_GOTPCREL)
3646 r_symndx = htab->r_sym (irel->r_info);
3647 if (r_symndx < symtab_hdr->sh_info)
3648 h = elf_x86_64_get_local_sym_hash (htab, sec->owner,
3649 (const Elf_Internal_Rela *) irel,
3653 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
3654 while (h->root.type == bfd_link_hash_indirect
3655 || h->root.type == bfd_link_hash_warning)
3656 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3659 /* STT_GNU_IFUNC must keep GOTPCREL relocations. */
3660 if (h != NULL && h->type == STT_GNU_IFUNC)
3664 if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h,
3665 &converted, link_info))
3670 changed = converted;
3673 if (h->got.refcount > 0)
3674 h->got.refcount -= 1;
3678 if (local_got_refcounts != NULL
3679 && local_got_refcounts[r_symndx] > 0)
3680 local_got_refcounts[r_symndx] -= 1;
3685 if (contents != NULL
3686 && elf_section_data (sec)->this_hdr.contents != contents)
3688 if (!changed && !link_info->keep_memory)
3692 /* Cache the section contents for elf_link_input_bfd. */
3693 elf_section_data (sec)->this_hdr.contents = contents;
3697 if (elf_section_data (sec)->relocs != internal_relocs)
3700 free (internal_relocs);
3702 elf_section_data (sec)->relocs = internal_relocs;
3708 if (contents != NULL
3709 && elf_section_data (sec)->this_hdr.contents != contents)
3711 if (internal_relocs != NULL
3712 && elf_section_data (sec)->relocs != internal_relocs)
3713 free (internal_relocs);
3717 /* Set the sizes of the dynamic sections. */
3720 elf_x86_64_size_dynamic_sections (bfd *output_bfd,
3721 struct bfd_link_info *info)
3723 struct elf_x86_64_link_hash_table *htab;
3728 const struct elf_backend_data *bed;
3730 htab = elf_x86_64_hash_table (info);
3733 bed = get_elf_backend_data (output_bfd);
3735 dynobj = htab->elf.dynobj;
3739 /* Set up .got offsets for local syms, and space for local dynamic
3741 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3743 bfd_signed_vma *local_got;
3744 bfd_signed_vma *end_local_got;
3745 char *local_tls_type;
3746 bfd_vma *local_tlsdesc_gotent;
3747 bfd_size_type locsymcount;
3748 Elf_Internal_Shdr *symtab_hdr;
3751 if (! is_x86_64_elf (ibfd))
3754 for (s = ibfd->sections; s != NULL; s = s->next)
3756 struct elf_dyn_relocs *p;
3758 if (!elf_x86_64_convert_load (ibfd, s, info))
3761 for (p = (struct elf_dyn_relocs *)
3762 (elf_section_data (s)->local_dynrel);
3766 if (!bfd_is_abs_section (p->sec)
3767 && bfd_is_abs_section (p->sec->output_section))
3769 /* Input section has been discarded, either because
3770 it is a copy of a linkonce section or due to
3771 linker script /DISCARD/, so we'll be discarding
3774 else if (p->count != 0)
3776 srel = elf_section_data (p->sec)->sreloc;
3777 srel->size += p->count * bed->s->sizeof_rela;
3778 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3779 && (info->flags & DF_TEXTREL) == 0)
3781 info->flags |= DF_TEXTREL;
3782 if ((info->warn_shared_textrel && bfd_link_pic (info))
3783 || info->error_textrel)
3784 /* xgettext:c-format */
3785 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3786 p->sec->owner, p->sec);
3792 local_got = elf_local_got_refcounts (ibfd);
3796 symtab_hdr = &elf_symtab_hdr (ibfd);
3797 locsymcount = symtab_hdr->sh_info;
3798 end_local_got = local_got + locsymcount;
3799 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
3800 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
3802 srel = htab->elf.srelgot;
3803 for (; local_got < end_local_got;
3804 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3806 *local_tlsdesc_gotent = (bfd_vma) -1;
3809 if (GOT_TLS_GDESC_P (*local_tls_type))
3811 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3812 - elf_x86_64_compute_jump_table_size (htab);
3813 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3814 *local_got = (bfd_vma) -2;
3816 if (! GOT_TLS_GDESC_P (*local_tls_type)
3817 || GOT_TLS_GD_P (*local_tls_type))
3819 *local_got = s->size;
3820 s->size += GOT_ENTRY_SIZE;
3821 if (GOT_TLS_GD_P (*local_tls_type))
3822 s->size += GOT_ENTRY_SIZE;
3824 if (bfd_link_pic (info)
3825 || GOT_TLS_GD_ANY_P (*local_tls_type)
3826 || *local_tls_type == GOT_TLS_IE)
3828 if (GOT_TLS_GDESC_P (*local_tls_type))
3830 htab->elf.srelplt->size
3831 += bed->s->sizeof_rela;
3832 htab->tlsdesc_plt = (bfd_vma) -1;
3834 if (! GOT_TLS_GDESC_P (*local_tls_type)
3835 || GOT_TLS_GD_P (*local_tls_type))
3836 srel->size += bed->s->sizeof_rela;
3840 *local_got = (bfd_vma) -1;
3844 if (htab->tls_ld_got.refcount > 0)
3846 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3848 htab->tls_ld_got.offset = htab->elf.sgot->size;
3849 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
3850 htab->elf.srelgot->size += bed->s->sizeof_rela;
3853 htab->tls_ld_got.offset = -1;
3855 /* Allocate global sym .plt and .got entries, and space for global
3856 sym dynamic relocs. */
3857 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
3860 /* Allocate .plt and .got entries, and space for local symbols. */
3861 htab_traverse (htab->loc_hash_table,
3862 elf_x86_64_allocate_local_dynrelocs,
3865 /* For every jump slot reserved in the sgotplt, reloc_count is
3866 incremented. However, when we reserve space for TLS descriptors,
3867 it's not incremented, so in order to compute the space reserved
3868 for them, it suffices to multiply the reloc count by the jump
3871 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3872 so that R_X86_64_IRELATIVE entries come last. */
3873 if (htab->elf.srelplt)
3875 htab->sgotplt_jump_table_size
3876 = elf_x86_64_compute_jump_table_size (htab);
3877 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3879 else if (htab->elf.irelplt)
3880 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3882 if (htab->tlsdesc_plt)
3884 /* If we're not using lazy TLS relocations, don't generate the
3885 PLT and GOT entries they require. */
3886 if ((info->flags & DF_BIND_NOW))
3887 htab->tlsdesc_plt = 0;
3890 htab->tlsdesc_got = htab->elf.sgot->size;
3891 htab->elf.sgot->size += GOT_ENTRY_SIZE;
3892 /* Reserve room for the initial entry.
3893 FIXME: we could probably do away with it in this case. */
3894 if (htab->elf.splt->size == 0)
3895 htab->elf.splt->size = htab->plt.plt_entry_size;
3896 htab->tlsdesc_plt = htab->elf.splt->size;
3897 htab->elf.splt->size += htab->plt.plt_entry_size;
3901 if (htab->elf.sgotplt)
3903 /* Don't allocate .got.plt section if there are no GOT nor PLT
3904 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3905 if ((htab->elf.hgot == NULL
3906 || !htab->elf.hgot->ref_regular_nonweak)
3907 && (htab->elf.sgotplt->size
3908 == get_elf_backend_data (output_bfd)->got_header_size)
3909 && (htab->elf.splt == NULL
3910 || htab->elf.splt->size == 0)
3911 && (htab->elf.sgot == NULL
3912 || htab->elf.sgot->size == 0)
3913 && (htab->elf.iplt == NULL
3914 || htab->elf.iplt->size == 0)
3915 && (htab->elf.igotplt == NULL
3916 || htab->elf.igotplt->size == 0))
3917 htab->elf.sgotplt->size = 0;
3920 if (_bfd_elf_eh_frame_present (info))
3922 if (htab->plt_eh_frame != NULL
3923 && htab->elf.splt != NULL
3924 && htab->elf.splt->size != 0
3925 && !bfd_is_abs_section (htab->elf.splt->output_section))
3926 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
3928 if (htab->plt_got_eh_frame != NULL
3929 && htab->plt_got != NULL
3930 && htab->plt_got->size != 0
3931 && !bfd_is_abs_section (htab->plt_got->output_section))
3932 htab->plt_got_eh_frame->size
3933 = htab->non_lazy_plt->eh_frame_plt_size;
3935 /* Unwind info for the second PLT and .plt.got sections are
3937 if (htab->plt_second_eh_frame != NULL
3938 && htab->plt_second != NULL
3939 && htab->plt_second->size != 0
3940 && !bfd_is_abs_section (htab->plt_second->output_section))
3941 htab->plt_second_eh_frame->size
3942 = htab->non_lazy_plt->eh_frame_plt_size;
3945 /* We now have determined the sizes of the various dynamic sections.
3946 Allocate memory for them. */
3948 for (s = dynobj->sections; s != NULL; s = s->next)
3950 if ((s->flags & SEC_LINKER_CREATED) == 0)
3953 if (s == htab->elf.splt
3954 || s == htab->elf.sgot
3955 || s == htab->elf.sgotplt
3956 || s == htab->elf.iplt
3957 || s == htab->elf.igotplt
3958 || s == htab->plt_second
3959 || s == htab->plt_got
3960 || s == htab->plt_eh_frame
3961 || s == htab->plt_got_eh_frame
3962 || s == htab->plt_second_eh_frame
3963 || s == htab->elf.sdynbss
3964 || s == htab->elf.sdynrelro)
3966 /* Strip this section if we don't need it; see the
3969 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
3971 if (s->size != 0 && s != htab->elf.srelplt)
3974 /* We use the reloc_count field as a counter if we need
3975 to copy relocs into the output file. */
3976 if (s != htab->elf.srelplt)
3981 /* It's not one of our sections, so don't allocate space. */
3987 /* If we don't need this section, strip it from the
3988 output file. This is mostly to handle .rela.bss and
3989 .rela.plt. We must create both sections in
3990 create_dynamic_sections, because they must be created
3991 before the linker maps input sections to output
3992 sections. The linker does that before
3993 adjust_dynamic_symbol is called, and it is that
3994 function which decides whether anything needs to go
3995 into these sections. */
3997 s->flags |= SEC_EXCLUDE;
4001 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4004 /* Allocate memory for the section contents. We use bfd_zalloc
4005 here in case unused entries are not reclaimed before the
4006 section's contents are written out. This should not happen,
4007 but this way if it does, we get a R_X86_64_NONE reloc instead
4009 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4010 if (s->contents == NULL)
4014 if (htab->plt_eh_frame != NULL
4015 && htab->plt_eh_frame->contents != NULL)
4017 memcpy (htab->plt_eh_frame->contents,
4018 htab->plt.eh_frame_plt, htab->plt_eh_frame->size);
4019 bfd_put_32 (dynobj, htab->elf.splt->size,
4020 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
4023 if (htab->plt_got_eh_frame != NULL
4024 && htab->plt_got_eh_frame->contents != NULL)
4026 memcpy (htab->plt_got_eh_frame->contents,
4027 htab->non_lazy_plt->eh_frame_plt,
4028 htab->plt_got_eh_frame->size);
4029 bfd_put_32 (dynobj, htab->plt_got->size,
4030 (htab->plt_got_eh_frame->contents
4031 + PLT_FDE_LEN_OFFSET));
4034 if (htab->plt_second_eh_frame != NULL
4035 && htab->plt_second_eh_frame->contents != NULL)
4037 memcpy (htab->plt_second_eh_frame->contents,
4038 htab->non_lazy_plt->eh_frame_plt,
4039 htab->plt_second_eh_frame->size);
4040 bfd_put_32 (dynobj, htab->plt_second->size,
4041 (htab->plt_second_eh_frame->contents
4042 + PLT_FDE_LEN_OFFSET));
4045 if (htab->elf.dynamic_sections_created)
4047 /* Add some entries to the .dynamic section. We fill in the
4048 values later, in elf_x86_64_finish_dynamic_sections, but we
4049 must add the entries now so that we get the correct size for
4050 the .dynamic section. The DT_DEBUG entry is filled in by the
4051 dynamic linker and used by the debugger. */
4052 #define add_dynamic_entry(TAG, VAL) \
4053 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4055 if (bfd_link_executable (info))
4057 if (!add_dynamic_entry (DT_DEBUG, 0))
4061 if (htab->elf.splt->size != 0)
4063 /* DT_PLTGOT is used by prelink even if there is no PLT
4065 if (!add_dynamic_entry (DT_PLTGOT, 0))
4069 if (htab->elf.srelplt->size != 0)
4071 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
4072 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4073 || !add_dynamic_entry (DT_JMPREL, 0))
4077 if (htab->tlsdesc_plt
4078 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
4079 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
4084 if (!add_dynamic_entry (DT_RELA, 0)
4085 || !add_dynamic_entry (DT_RELASZ, 0)
4086 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
4089 /* If any dynamic relocs apply to a read-only section,
4090 then we need a DT_TEXTREL entry. */
4091 if ((info->flags & DF_TEXTREL) == 0)
4092 elf_link_hash_traverse (&htab->elf,
4093 elf_x86_64_readonly_dynrelocs,
4096 if ((info->flags & DF_TEXTREL) != 0)
4098 if (htab->readonly_dynrelocs_against_ifunc)
4100 info->callbacks->einfo
4101 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
4102 bfd_set_error (bfd_error_bad_value);
4106 if (!add_dynamic_entry (DT_TEXTREL, 0))
4111 #undef add_dynamic_entry
4117 elf_x86_64_always_size_sections (bfd *output_bfd,
4118 struct bfd_link_info *info)
4120 asection *tls_sec = elf_hash_table (info)->tls_sec;
4124 struct elf_link_hash_entry *tlsbase;
4126 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
4127 "_TLS_MODULE_BASE_",
4128 FALSE, FALSE, FALSE);
4130 if (tlsbase && tlsbase->type == STT_TLS)
4132 struct elf_x86_64_link_hash_table *htab;
4133 struct bfd_link_hash_entry *bh = NULL;
4134 const struct elf_backend_data *bed
4135 = get_elf_backend_data (output_bfd);
4137 htab = elf_x86_64_hash_table (info);
4141 if (!(_bfd_generic_link_add_one_symbol
4142 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
4143 tls_sec, 0, NULL, FALSE,
4144 bed->collect, &bh)))
4147 htab->tls_module_base = bh;
4149 tlsbase = (struct elf_link_hash_entry *)bh;
4150 tlsbase->def_regular = 1;
4151 tlsbase->other = STV_HIDDEN;
4152 tlsbase->root.linker_def = 1;
4153 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
4160 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
4161 executables. Rather than setting it to the beginning of the TLS
4162 section, we have to set it to the end. This function may be called
4163 multiple times, it is idempotent. */
4166 elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
4168 struct elf_x86_64_link_hash_table *htab;
4169 struct bfd_link_hash_entry *base;
4171 if (!bfd_link_executable (info))
4174 htab = elf_x86_64_hash_table (info);
4178 base = htab->tls_module_base;
4182 base->u.def.value = htab->elf.tls_size;
4185 /* Return the base VMA address which should be subtracted from real addresses
4186 when resolving @dtpoff relocation.
4187 This is PT_TLS segment p_vaddr. */
4190 elf_x86_64_dtpoff_base (struct bfd_link_info *info)
4192 /* If tls_sec is NULL, we should have signalled an error already. */
4193 if (elf_hash_table (info)->tls_sec == NULL)
4195 return elf_hash_table (info)->tls_sec->vma;
4198 /* Return the relocation value for @tpoff relocation
4199 if STT_TLS virtual address is ADDRESS. */
4202 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
4204 struct elf_link_hash_table *htab = elf_hash_table (info);
4205 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
4206 bfd_vma static_tls_size;
4208 /* If tls_segment is NULL, we should have signalled an error already. */
4209 if (htab->tls_sec == NULL)
4212 /* Consider special static TLS alignment requirements. */
4213 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
4214 return address - static_tls_size - htab->tls_sec->vma;
4217 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
4221 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
4223 /* Opcode Instruction
4226 0x0f 0x8x conditional jump */
4228 && (contents [offset - 1] == 0xe8
4229 || contents [offset - 1] == 0xe9))
4231 && contents [offset - 2] == 0x0f
4232 && (contents [offset - 1] & 0xf0) == 0x80));
4235 /* Relocate an x86_64 ELF section. */
4238 elf_x86_64_relocate_section (bfd *output_bfd,
4239 struct bfd_link_info *info,
4241 asection *input_section,
4243 Elf_Internal_Rela *relocs,
4244 Elf_Internal_Sym *local_syms,
4245 asection **local_sections)
4247 struct elf_x86_64_link_hash_table *htab;
4248 Elf_Internal_Shdr *symtab_hdr;
4249 struct elf_link_hash_entry **sym_hashes;
4250 bfd_vma *local_got_offsets;
4251 bfd_vma *local_tlsdesc_gotents;
4252 Elf_Internal_Rela *rel;
4253 Elf_Internal_Rela *wrel;
4254 Elf_Internal_Rela *relend;
4255 unsigned int plt_entry_size;
4257 BFD_ASSERT (is_x86_64_elf (input_bfd));
4259 /* Skip if check_relocs failed. */
4260 if (input_section->check_relocs_failed)
4263 htab = elf_x86_64_hash_table (info);
4266 plt_entry_size = htab->plt.plt_entry_size;
4267 symtab_hdr = &elf_symtab_hdr (input_bfd);
4268 sym_hashes = elf_sym_hashes (input_bfd);
4269 local_got_offsets = elf_local_got_offsets (input_bfd);
4270 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
4272 elf_x86_64_set_tls_module_base (info);
4274 rel = wrel = relocs;
4275 relend = relocs + input_section->reloc_count;
4276 for (; rel < relend; wrel++, rel++)
4278 unsigned int r_type;
4279 reloc_howto_type *howto;
4280 unsigned long r_symndx;
4281 struct elf_link_hash_entry *h;
4282 struct elf_x86_64_link_hash_entry *eh;
4283 Elf_Internal_Sym *sym;
4285 bfd_vma off, offplt, plt_offset;
4287 bfd_boolean unresolved_reloc;
4288 bfd_reloc_status_type r;
4290 asection *base_got, *resolved_plt;
4292 bfd_boolean resolved_to_zero;
4293 bfd_boolean relative_reloc;
4295 r_type = ELF32_R_TYPE (rel->r_info);
4296 if (r_type == (int) R_X86_64_GNU_VTINHERIT
4297 || r_type == (int) R_X86_64_GNU_VTENTRY)
4304 if (r_type >= (int) R_X86_64_standard)
4305 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
4307 if (r_type != (int) R_X86_64_32
4308 || ABI_64_P (output_bfd))
4309 howto = x86_64_elf_howto_table + r_type;
4311 howto = (x86_64_elf_howto_table
4312 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
4313 r_symndx = htab->r_sym (rel->r_info);
4317 unresolved_reloc = FALSE;
4318 if (r_symndx < symtab_hdr->sh_info)
4320 sym = local_syms + r_symndx;
4321 sec = local_sections[r_symndx];
4323 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
4325 st_size = sym->st_size;
4327 /* Relocate against local STT_GNU_IFUNC symbol. */
4328 if (!bfd_link_relocatable (info)
4329 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4331 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
4336 /* Set STT_GNU_IFUNC symbol value. */
4337 h->root.u.def.value = sym->st_value;
4338 h->root.u.def.section = sec;
4343 bfd_boolean warned ATTRIBUTE_UNUSED;
4344 bfd_boolean ignored ATTRIBUTE_UNUSED;
4346 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4347 r_symndx, symtab_hdr, sym_hashes,
4349 unresolved_reloc, warned, ignored);
4353 if (sec != NULL && discarded_section (sec))
4355 _bfd_clear_contents (howto, input_bfd, input_section,
4356 contents + rel->r_offset);
4357 wrel->r_offset = rel->r_offset;
4361 /* For ld -r, remove relocations in debug sections against
4362 sections defined in discarded sections. Not done for
4363 eh_frame editing code expects to be present. */
4364 if (bfd_link_relocatable (info)
4365 && (input_section->flags & SEC_DEBUGGING))
4371 if (bfd_link_relocatable (info))
4378 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
4380 if (r_type == R_X86_64_64)
4382 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
4383 zero-extend it to 64bit if addend is zero. */
4384 r_type = R_X86_64_32;
4385 memset (contents + rel->r_offset + 4, 0, 4);
4387 else if (r_type == R_X86_64_SIZE64)
4389 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
4390 zero-extend it to 64bit if addend is zero. */
4391 r_type = R_X86_64_SIZE32;
4392 memset (contents + rel->r_offset + 4, 0, 4);
4396 eh = (struct elf_x86_64_link_hash_entry *) h;
4398 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4399 it here if it is defined in a non-shared object. */
4401 && h->type == STT_GNU_IFUNC
4407 if ((input_section->flags & SEC_ALLOC) == 0)
4409 /* Dynamic relocs are not propagated for SEC_DEBUGGING
4410 sections because such sections are not SEC_ALLOC and
4411 thus ld.so will not process them. */
4412 if ((input_section->flags & SEC_DEBUGGING) != 0)
4422 case R_X86_64_GOTPCREL:
4423 case R_X86_64_GOTPCRELX:
4424 case R_X86_64_REX_GOTPCRELX:
4425 case R_X86_64_GOTPCREL64:
4426 base_got = htab->elf.sgot;
4427 off = h->got.offset;
4429 if (base_got == NULL)
4432 if (off == (bfd_vma) -1)
4434 /* We can't use h->got.offset here to save state, or
4435 even just remember the offset, as finish_dynamic_symbol
4436 would use that as offset into .got. */
4438 if (h->plt.offset == (bfd_vma) -1)
4441 if (htab->elf.splt != NULL)
4443 plt_index = (h->plt.offset / plt_entry_size
4444 - htab->plt.has_plt0);
4445 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4446 base_got = htab->elf.sgotplt;
4450 plt_index = h->plt.offset / plt_entry_size;
4451 off = plt_index * GOT_ENTRY_SIZE;
4452 base_got = htab->elf.igotplt;
4455 if (h->dynindx == -1
4459 /* This references the local defitionion. We must
4460 initialize this entry in the global offset table.
4461 Since the offset must always be a multiple of 8,
4462 we use the least significant bit to record
4463 whether we have initialized it already.
4465 When doing a dynamic link, we create a .rela.got
4466 relocation entry to initialize the value. This
4467 is done in the finish_dynamic_symbol routine. */
4472 bfd_put_64 (output_bfd, relocation,
4473 base_got->contents + off);
4474 /* Note that this is harmless for the GOTPLT64
4475 case, as -1 | 1 still is -1. */
4481 relocation = (base_got->output_section->vma
4482 + base_got->output_offset + off);
4487 if (h->plt.offset == (bfd_vma) -1)
4489 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4490 if (r_type == htab->pointer_r_type
4491 && (input_section->flags & SEC_CODE) == 0)
4492 goto do_ifunc_pointer;
4493 goto bad_ifunc_reloc;
4496 /* STT_GNU_IFUNC symbol must go through PLT. */
4497 if (htab->elf.splt != NULL)
4499 if (htab->plt_second != NULL)
4501 resolved_plt = htab->plt_second;
4502 plt_offset = eh->plt_second.offset;
4506 resolved_plt = htab->elf.splt;
4507 plt_offset = h->plt.offset;
4512 resolved_plt = htab->elf.iplt;
4513 plt_offset = h->plt.offset;
4516 relocation = (resolved_plt->output_section->vma
4517 + resolved_plt->output_offset + plt_offset);
4523 if (h->root.root.string)
4524 name = h->root.root.string;
4526 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4529 /* xgettext:c-format */
4530 (_("%B: relocation %s against STT_GNU_IFUNC "
4531 "symbol `%s' isn't supported"), input_bfd,
4533 bfd_set_error (bfd_error_bad_value);
4537 if (bfd_link_pic (info))
4542 if (ABI_64_P (output_bfd))
4547 if (rel->r_addend != 0)
4549 if (h->root.root.string)
4550 name = h->root.root.string;
4552 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4555 /* xgettext:c-format */
4556 (_("%B: relocation %s against STT_GNU_IFUNC "
4557 "symbol `%s' has non-zero addend: %Ld"),
4558 input_bfd, howto->name, name, rel->r_addend);
4559 bfd_set_error (bfd_error_bad_value);
4563 /* Generate dynamic relcoation only when there is a
4564 non-GOT reference in a shared object or there is no
4566 if ((bfd_link_pic (info) && h->non_got_ref)
4567 || h->plt.offset == (bfd_vma) -1)
4569 Elf_Internal_Rela outrel;
4572 /* Need a dynamic relocation to get the real function
4574 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4578 if (outrel.r_offset == (bfd_vma) -1
4579 || outrel.r_offset == (bfd_vma) -2)
4582 outrel.r_offset += (input_section->output_section->vma
4583 + input_section->output_offset);
4585 if (h->dynindx == -1
4587 || bfd_link_executable (info))
4589 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4590 h->root.root.string,
4591 h->root.u.def.section->owner);
4593 /* This symbol is resolved locally. */
4594 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4595 outrel.r_addend = (h->root.u.def.value
4596 + h->root.u.def.section->output_section->vma
4597 + h->root.u.def.section->output_offset);
4601 outrel.r_info = htab->r_info (h->dynindx, r_type);
4602 outrel.r_addend = 0;
4605 /* Dynamic relocations are stored in
4606 1. .rela.ifunc section in PIC object.
4607 2. .rela.got section in dynamic executable.
4608 3. .rela.iplt section in static executable. */
4609 if (bfd_link_pic (info))
4610 sreloc = htab->elf.irelifunc;
4611 else if (htab->elf.splt != NULL)
4612 sreloc = htab->elf.srelgot;
4614 sreloc = htab->elf.irelplt;
4615 elf_append_rela (output_bfd, sreloc, &outrel);
4617 /* If this reloc is against an external symbol, we
4618 do not want to fiddle with the addend. Otherwise,
4619 we need to include the symbol value so that it
4620 becomes an addend for the dynamic reloc. For an
4621 internal symbol, we have updated addend. */
4626 case R_X86_64_PC32_BND:
4628 case R_X86_64_PLT32:
4629 case R_X86_64_PLT32_BND:
4634 resolved_to_zero = (eh != NULL
4635 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4639 /* When generating a shared object, the relocations handled here are
4640 copied into the output file to be resolved at run time. */
4643 case R_X86_64_GOT32:
4644 case R_X86_64_GOT64:
4645 /* Relocation is to the entry for this symbol in the global
4647 case R_X86_64_GOTPCREL:
4648 case R_X86_64_GOTPCRELX:
4649 case R_X86_64_REX_GOTPCRELX:
4650 case R_X86_64_GOTPCREL64:
4651 /* Use global offset table entry as symbol value. */
4652 case R_X86_64_GOTPLT64:
4653 /* This is obsolete and treated the same as GOT64. */
4654 base_got = htab->elf.sgot;
4656 if (htab->elf.sgot == NULL)
4659 relative_reloc = FALSE;
4664 off = h->got.offset;
4666 && h->plt.offset != (bfd_vma)-1
4667 && off == (bfd_vma)-1)
4669 /* We can't use h->got.offset here to save
4670 state, or even just remember the offset, as
4671 finish_dynamic_symbol would use that as offset into
4673 bfd_vma plt_index = (h->plt.offset / plt_entry_size
4674 - htab->plt.has_plt0);
4675 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4676 base_got = htab->elf.sgotplt;
4679 dyn = htab->elf.dynamic_sections_created;
4681 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
4682 || (bfd_link_pic (info)
4683 && SYMBOL_REFERENCES_LOCAL (info, h))
4684 || (ELF_ST_VISIBILITY (h->other)
4685 && h->root.type == bfd_link_hash_undefweak))
4687 /* This is actually a static link, or it is a -Bsymbolic
4688 link and the symbol is defined locally, or the symbol
4689 was forced to be local because of a version file. We
4690 must initialize this entry in the global offset table.
4691 Since the offset must always be a multiple of 8, we
4692 use the least significant bit to record whether we
4693 have initialized it already.
4695 When doing a dynamic link, we create a .rela.got
4696 relocation entry to initialize the value. This is
4697 done in the finish_dynamic_symbol routine. */
4702 bfd_put_64 (output_bfd, relocation,
4703 base_got->contents + off);
4704 /* Note that this is harmless for the GOTPLT64 case,
4705 as -1 | 1 still is -1. */
4708 if (h->dynindx == -1
4710 && h->root.type != bfd_link_hash_undefweak
4711 && bfd_link_pic (info))
4713 /* If this symbol isn't dynamic in PIC,
4714 generate R_X86_64_RELATIVE here. */
4715 eh->no_finish_dynamic_symbol = 1;
4716 relative_reloc = TRUE;
4721 unresolved_reloc = FALSE;
4725 if (local_got_offsets == NULL)
4728 off = local_got_offsets[r_symndx];
4730 /* The offset must always be a multiple of 8. We use
4731 the least significant bit to record whether we have
4732 already generated the necessary reloc. */
4737 bfd_put_64 (output_bfd, relocation,
4738 base_got->contents + off);
4739 local_got_offsets[r_symndx] |= 1;
4741 if (bfd_link_pic (info))
4742 relative_reloc = TRUE;
4749 Elf_Internal_Rela outrel;
4751 /* We need to generate a R_X86_64_RELATIVE reloc
4752 for the dynamic linker. */
4753 s = htab->elf.srelgot;
4757 outrel.r_offset = (base_got->output_section->vma
4758 + base_got->output_offset
4760 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4761 outrel.r_addend = relocation;
4762 elf_append_rela (output_bfd, s, &outrel);
4765 if (off >= (bfd_vma) -2)
4768 relocation = base_got->output_section->vma
4769 + base_got->output_offset + off;
4770 if (r_type != R_X86_64_GOTPCREL
4771 && r_type != R_X86_64_GOTPCRELX
4772 && r_type != R_X86_64_REX_GOTPCRELX
4773 && r_type != R_X86_64_GOTPCREL64)
4774 relocation -= htab->elf.sgotplt->output_section->vma
4775 - htab->elf.sgotplt->output_offset;
4779 case R_X86_64_GOTOFF64:
4780 /* Relocation is relative to the start of the global offset
4783 /* Check to make sure it isn't a protected function or data
4784 symbol for shared library since it may not be local when
4785 used as function address or with copy relocation. We also
4786 need to make sure that a symbol is referenced locally. */
4787 if (bfd_link_pic (info) && h)
4789 if (!h->def_regular)
4793 switch (ELF_ST_VISIBILITY (h->other))
4796 v = _("hidden symbol");
4799 v = _("internal symbol");
4802 v = _("protected symbol");
4810 /* xgettext:c-format */
4811 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s"
4812 " `%s' can not be used when making a shared object"),
4813 input_bfd, v, h->root.root.string);
4814 bfd_set_error (bfd_error_bad_value);
4817 else if (!bfd_link_executable (info)
4818 && !SYMBOL_REFERENCES_LOCAL (info, h)
4819 && (h->type == STT_FUNC
4820 || h->type == STT_OBJECT)
4821 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4824 /* xgettext:c-format */
4825 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s"
4826 " `%s' can not be used when making a shared object"),
4828 h->type == STT_FUNC ? "function" : "data",
4829 h->root.root.string);
4830 bfd_set_error (bfd_error_bad_value);
4835 /* Note that sgot is not involved in this
4836 calculation. We always want the start of .got.plt. If we
4837 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4838 permitted by the ABI, we might have to change this
4840 relocation -= htab->elf.sgotplt->output_section->vma
4841 + htab->elf.sgotplt->output_offset;
4844 case R_X86_64_GOTPC32:
4845 case R_X86_64_GOTPC64:
4846 /* Use global offset table as symbol value. */
4847 relocation = htab->elf.sgotplt->output_section->vma
4848 + htab->elf.sgotplt->output_offset;
4849 unresolved_reloc = FALSE;
4852 case R_X86_64_PLTOFF64:
4853 /* Relocation is PLT entry relative to GOT. For local
4854 symbols it's the symbol itself relative to GOT. */
4856 /* See PLT32 handling. */
4857 && (h->plt.offset != (bfd_vma) -1
4858 || eh->plt_got.offset != (bfd_vma) -1)
4859 && htab->elf.splt != NULL)
4861 if (eh->plt_got.offset != (bfd_vma) -1)
4863 /* Use the GOT PLT. */
4864 resolved_plt = htab->plt_got;
4865 plt_offset = eh->plt_got.offset;
4867 else if (htab->plt_second != NULL)
4869 resolved_plt = htab->plt_second;
4870 plt_offset = eh->plt_second.offset;
4874 resolved_plt = htab->elf.splt;
4875 plt_offset = h->plt.offset;
4878 relocation = (resolved_plt->output_section->vma
4879 + resolved_plt->output_offset
4881 unresolved_reloc = FALSE;
4884 relocation -= htab->elf.sgotplt->output_section->vma
4885 + htab->elf.sgotplt->output_offset;
4888 case R_X86_64_PLT32:
4889 case R_X86_64_PLT32_BND:
4890 /* Relocation is to the entry for this symbol in the
4891 procedure linkage table. */
4893 /* Resolve a PLT32 reloc against a local symbol directly,
4894 without using the procedure linkage table. */
4898 if ((h->plt.offset == (bfd_vma) -1
4899 && eh->plt_got.offset == (bfd_vma) -1)
4900 || htab->elf.splt == NULL)
4902 /* We didn't make a PLT entry for this symbol. This
4903 happens when statically linking PIC code, or when
4904 using -Bsymbolic. */
4908 if (h->plt.offset != (bfd_vma) -1)
4910 if (htab->plt_second != NULL)
4912 resolved_plt = htab->plt_second;
4913 plt_offset = eh->plt_second.offset;
4917 resolved_plt = htab->elf.splt;
4918 plt_offset = h->plt.offset;
4923 /* Use the GOT PLT. */
4924 resolved_plt = htab->plt_got;
4925 plt_offset = eh->plt_got.offset;
4928 relocation = (resolved_plt->output_section->vma
4929 + resolved_plt->output_offset
4931 unresolved_reloc = FALSE;
4934 case R_X86_64_SIZE32:
4935 case R_X86_64_SIZE64:
4936 /* Set to symbol size. */
4937 relocation = st_size;
4943 case R_X86_64_PC32_BND:
4944 /* Don't complain about -fPIC if the symbol is undefined when
4945 building executable unless it is unresolved weak symbol or
4946 -z nocopyreloc is used. */
4947 if ((input_section->flags & SEC_ALLOC) != 0
4948 && (input_section->flags & SEC_READONLY) != 0
4950 && ((bfd_link_executable (info)
4951 && ((h->root.type == bfd_link_hash_undefweak
4952 && !resolved_to_zero)
4953 || (info->nocopyreloc
4955 && !(h->root.u.def.section->flags & SEC_CODE))))
4956 || bfd_link_dll (info)))
4958 bfd_boolean fail = FALSE;
4960 = ((r_type == R_X86_64_PC32
4961 || r_type == R_X86_64_PC32_BND)
4962 && is_32bit_relative_branch (contents, rel->r_offset));
4964 if (SYMBOL_REFERENCES_LOCAL (info, h))
4966 /* Symbol is referenced locally. Make sure it is
4967 defined locally or for a branch. */
4968 fail = (!(h->def_regular || ELF_COMMON_DEF_P (h))
4971 else if (!(bfd_link_pie (info)
4972 && (h->needs_copy || eh->needs_copy)))
4974 /* Symbol doesn't need copy reloc and isn't referenced
4975 locally. We only allow branch to symbol with
4976 non-default visibility. */
4978 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
4982 return elf_x86_64_need_pic (info, input_bfd, input_section,
4983 h, NULL, NULL, howto);
4992 /* FIXME: The ABI says the linker should make sure the value is
4993 the same when it's zeroextended to 64 bit. */
4996 if ((input_section->flags & SEC_ALLOC) == 0)
4999 /* Don't copy a pc-relative relocation into the output file
5000 if the symbol needs copy reloc or the symbol is undefined
5001 when building executable. Copy dynamic function pointer
5002 relocations. Don't generate dynamic relocations against
5003 resolved undefined weak symbols in PIE. */
5004 if ((bfd_link_pic (info)
5005 && !(bfd_link_pie (info)
5009 || h->root.type == bfd_link_hash_undefined)
5010 && (IS_X86_64_PCREL_TYPE (r_type)
5011 || r_type == R_X86_64_SIZE32
5012 || r_type == R_X86_64_SIZE64))
5014 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5015 && !resolved_to_zero)
5016 || h->root.type != bfd_link_hash_undefweak))
5017 && ((! IS_X86_64_PCREL_TYPE (r_type)
5018 && r_type != R_X86_64_SIZE32
5019 && r_type != R_X86_64_SIZE64)
5020 || ! SYMBOL_CALLS_LOCAL (info, h)))
5021 || (ELIMINATE_COPY_RELOCS
5022 && !bfd_link_pic (info)
5026 || eh->func_pointer_refcount > 0
5027 || (h->root.type == bfd_link_hash_undefweak
5028 && !resolved_to_zero))
5029 && ((h->def_dynamic && !h->def_regular)
5030 /* Undefined weak symbol is bound locally when
5032 || h->root.type == bfd_link_hash_undefined)))
5034 Elf_Internal_Rela outrel;
5035 bfd_boolean skip, relocate;
5038 /* When generating a shared object, these relocations
5039 are copied into the output file to be resolved at run
5045 _bfd_elf_section_offset (output_bfd, info, input_section,
5047 if (outrel.r_offset == (bfd_vma) -1)
5049 else if (outrel.r_offset == (bfd_vma) -2)
5050 skip = TRUE, relocate = TRUE;
5052 outrel.r_offset += (input_section->output_section->vma
5053 + input_section->output_offset);
5056 memset (&outrel, 0, sizeof outrel);
5058 /* h->dynindx may be -1 if this symbol was marked to
5062 && (IS_X86_64_PCREL_TYPE (r_type)
5063 || !(bfd_link_executable (info)
5064 || SYMBOLIC_BIND (info, h))
5065 || ! h->def_regular))
5067 outrel.r_info = htab->r_info (h->dynindx, r_type);
5068 outrel.r_addend = rel->r_addend;
5072 /* This symbol is local, or marked to become local.
5073 When relocation overflow check is disabled, we
5074 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
5075 if (r_type == htab->pointer_r_type
5076 || (r_type == R_X86_64_32
5077 && info->no_reloc_overflow_check))
5080 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
5081 outrel.r_addend = relocation + rel->r_addend;
5083 else if (r_type == R_X86_64_64
5084 && !ABI_64_P (output_bfd))
5087 outrel.r_info = htab->r_info (0,
5088 R_X86_64_RELATIVE64);
5089 outrel.r_addend = relocation + rel->r_addend;
5090 /* Check addend overflow. */
5091 if ((outrel.r_addend & 0x80000000)
5092 != (rel->r_addend & 0x80000000))
5095 int addend = rel->r_addend;
5096 if (h && h->root.root.string)
5097 name = h->root.root.string;
5099 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
5102 /* xgettext:c-format */
5103 (_("%B: addend %s%#x in relocation %s against "
5104 "symbol `%s' at %#Lx in section `%A' is "
5106 input_bfd, addend < 0 ? "-" : "", addend,
5107 howto->name, name, rel->r_offset, input_section);
5108 bfd_set_error (bfd_error_bad_value);
5116 if (bfd_is_abs_section (sec))
5118 else if (sec == NULL || sec->owner == NULL)
5120 bfd_set_error (bfd_error_bad_value);
5127 /* We are turning this relocation into one
5128 against a section symbol. It would be
5129 proper to subtract the symbol's value,
5130 osec->vma, from the emitted reloc addend,
5131 but ld.so expects buggy relocs. */
5132 osec = sec->output_section;
5133 sindx = elf_section_data (osec)->dynindx;
5136 asection *oi = htab->elf.text_index_section;
5137 sindx = elf_section_data (oi)->dynindx;
5139 BFD_ASSERT (sindx != 0);
5142 outrel.r_info = htab->r_info (sindx, r_type);
5143 outrel.r_addend = relocation + rel->r_addend;
5147 sreloc = elf_section_data (input_section)->sreloc;
5149 if (sreloc == NULL || sreloc->contents == NULL)
5151 r = bfd_reloc_notsupported;
5152 goto check_relocation_error;
5155 elf_append_rela (output_bfd, sreloc, &outrel);
5157 /* If this reloc is against an external symbol, we do
5158 not want to fiddle with the addend. Otherwise, we
5159 need to include the symbol value so that it becomes
5160 an addend for the dynamic reloc. */
5167 case R_X86_64_TLSGD:
5168 case R_X86_64_GOTPC32_TLSDESC:
5169 case R_X86_64_TLSDESC_CALL:
5170 case R_X86_64_GOTTPOFF:
5171 tls_type = GOT_UNKNOWN;
5172 if (h == NULL && local_got_offsets)
5173 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
5175 tls_type = elf_x86_64_hash_entry (h)->tls_type;
5177 if (! elf_x86_64_tls_transition (info, input_bfd,
5178 input_section, contents,
5179 symtab_hdr, sym_hashes,
5180 &r_type, tls_type, rel,
5181 relend, h, r_symndx, TRUE))
5184 if (r_type == R_X86_64_TPOFF32)
5186 bfd_vma roff = rel->r_offset;
5188 BFD_ASSERT (! unresolved_reloc);
5190 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
5192 /* GD->LE transition. For 64bit, change
5193 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5194 .word 0x6666; rex64; call __tls_get_addr@PLT
5196 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5198 call *__tls_get_addr@GOTPCREL(%rip)
5199 which may be converted to
5200 addr32 call __tls_get_addr
5203 leaq foo@tpoff(%rax), %rax
5205 leaq foo@tlsgd(%rip), %rdi
5206 .word 0x6666; rex64; call __tls_get_addr@PLT
5208 leaq foo@tlsgd(%rip), %rdi
5210 call *__tls_get_addr@GOTPCREL(%rip)
5211 which may be converted to
5212 addr32 call __tls_get_addr
5215 leaq foo@tpoff(%rax), %rax
5216 For largepic, change:
5217 leaq foo@tlsgd(%rip), %rdi
5218 movabsq $__tls_get_addr@pltoff, %rax
5223 leaq foo@tpoff(%rax), %rax
5224 nopw 0x0(%rax,%rax,1) */
5226 if (ABI_64_P (output_bfd))
5228 if (contents[roff + 5] == 0xb8)
5230 memcpy (contents + roff - 3,
5231 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
5232 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5236 memcpy (contents + roff - 4,
5237 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
5241 memcpy (contents + roff - 3,
5242 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
5244 bfd_put_32 (output_bfd,
5245 elf_x86_64_tpoff (info, relocation),
5246 contents + roff + 8 + largepic);
5247 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
5248 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
5253 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
5255 /* GDesc -> LE transition.
5256 It's originally something like:
5257 leaq x@tlsdesc(%rip), %rax
5260 movl $x@tpoff, %rax. */
5262 unsigned int val, type;
5264 type = bfd_get_8 (input_bfd, contents + roff - 3);
5265 val = bfd_get_8 (input_bfd, contents + roff - 1);
5266 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
5267 contents + roff - 3);
5268 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
5269 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
5270 contents + roff - 1);
5271 bfd_put_32 (output_bfd,
5272 elf_x86_64_tpoff (info, relocation),
5276 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
5278 /* GDesc -> LE transition.
5283 bfd_put_8 (output_bfd, 0x66, contents + roff);
5284 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5287 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
5289 /* IE->LE transition:
5290 For 64bit, originally it can be one of:
5291 movq foo@gottpoff(%rip), %reg
5292 addq foo@gottpoff(%rip), %reg
5295 leaq foo(%reg), %reg
5297 For 32bit, originally it can be one of:
5298 movq foo@gottpoff(%rip), %reg
5299 addl foo@gottpoff(%rip), %reg
5302 leal foo(%reg), %reg
5305 unsigned int val, type, reg;
5308 val = bfd_get_8 (input_bfd, contents + roff - 3);
5311 type = bfd_get_8 (input_bfd, contents + roff - 2);
5312 reg = bfd_get_8 (input_bfd, contents + roff - 1);
5318 bfd_put_8 (output_bfd, 0x49,
5319 contents + roff - 3);
5320 else if (!ABI_64_P (output_bfd) && val == 0x44)
5321 bfd_put_8 (output_bfd, 0x41,
5322 contents + roff - 3);
5323 bfd_put_8 (output_bfd, 0xc7,
5324 contents + roff - 2);
5325 bfd_put_8 (output_bfd, 0xc0 | reg,
5326 contents + roff - 1);
5330 /* addq/addl -> addq/addl - addressing with %rsp/%r12
5333 bfd_put_8 (output_bfd, 0x49,
5334 contents + roff - 3);
5335 else if (!ABI_64_P (output_bfd) && val == 0x44)
5336 bfd_put_8 (output_bfd, 0x41,
5337 contents + roff - 3);
5338 bfd_put_8 (output_bfd, 0x81,
5339 contents + roff - 2);
5340 bfd_put_8 (output_bfd, 0xc0 | reg,
5341 contents + roff - 1);
5345 /* addq/addl -> leaq/leal */
5347 bfd_put_8 (output_bfd, 0x4d,
5348 contents + roff - 3);
5349 else if (!ABI_64_P (output_bfd) && val == 0x44)
5350 bfd_put_8 (output_bfd, 0x45,
5351 contents + roff - 3);
5352 bfd_put_8 (output_bfd, 0x8d,
5353 contents + roff - 2);
5354 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
5355 contents + roff - 1);
5357 bfd_put_32 (output_bfd,
5358 elf_x86_64_tpoff (info, relocation),
5366 if (htab->elf.sgot == NULL)
5371 off = h->got.offset;
5372 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
5376 if (local_got_offsets == NULL)
5379 off = local_got_offsets[r_symndx];
5380 offplt = local_tlsdesc_gotents[r_symndx];
5387 Elf_Internal_Rela outrel;
5391 if (htab->elf.srelgot == NULL)
5394 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5396 if (GOT_TLS_GDESC_P (tls_type))
5398 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
5399 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
5400 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
5401 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
5402 + htab->elf.sgotplt->output_offset
5404 + htab->sgotplt_jump_table_size);
5405 sreloc = htab->elf.srelplt;
5407 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
5409 outrel.r_addend = 0;
5410 elf_append_rela (output_bfd, sreloc, &outrel);
5413 sreloc = htab->elf.srelgot;
5415 outrel.r_offset = (htab->elf.sgot->output_section->vma
5416 + htab->elf.sgot->output_offset + off);
5418 if (GOT_TLS_GD_P (tls_type))
5419 dr_type = R_X86_64_DTPMOD64;
5420 else if (GOT_TLS_GDESC_P (tls_type))
5423 dr_type = R_X86_64_TPOFF64;
5425 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
5426 outrel.r_addend = 0;
5427 if ((dr_type == R_X86_64_TPOFF64
5428 || dr_type == R_X86_64_TLSDESC) && indx == 0)
5429 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
5430 outrel.r_info = htab->r_info (indx, dr_type);
5432 elf_append_rela (output_bfd, sreloc, &outrel);
5434 if (GOT_TLS_GD_P (tls_type))
5438 BFD_ASSERT (! unresolved_reloc);
5439 bfd_put_64 (output_bfd,
5440 relocation - elf_x86_64_dtpoff_base (info),
5441 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5445 bfd_put_64 (output_bfd, 0,
5446 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5447 outrel.r_info = htab->r_info (indx,
5449 outrel.r_offset += GOT_ENTRY_SIZE;
5450 elf_append_rela (output_bfd, sreloc,
5459 local_got_offsets[r_symndx] |= 1;
5462 if (off >= (bfd_vma) -2
5463 && ! GOT_TLS_GDESC_P (tls_type))
5465 if (r_type == ELF32_R_TYPE (rel->r_info))
5467 if (r_type == R_X86_64_GOTPC32_TLSDESC
5468 || r_type == R_X86_64_TLSDESC_CALL)
5469 relocation = htab->elf.sgotplt->output_section->vma
5470 + htab->elf.sgotplt->output_offset
5471 + offplt + htab->sgotplt_jump_table_size;
5473 relocation = htab->elf.sgot->output_section->vma
5474 + htab->elf.sgot->output_offset + off;
5475 unresolved_reloc = FALSE;
5479 bfd_vma roff = rel->r_offset;
5481 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
5483 /* GD->IE transition. For 64bit, change
5484 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5485 .word 0x6666; rex64; call __tls_get_addr@PLT
5487 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5489 call *__tls_get_addr@GOTPCREL(%rip
5490 which may be converted to
5491 addr32 call __tls_get_addr
5494 addq foo@gottpoff(%rip), %rax
5496 leaq foo@tlsgd(%rip), %rdi
5497 .word 0x6666; rex64; call __tls_get_addr@PLT
5499 leaq foo@tlsgd(%rip), %rdi
5501 call *__tls_get_addr@GOTPCREL(%rip)
5502 which may be converted to
5503 addr32 call __tls_get_addr
5506 addq foo@gottpoff(%rip), %rax
5507 For largepic, change:
5508 leaq foo@tlsgd(%rip), %rdi
5509 movabsq $__tls_get_addr@pltoff, %rax
5514 addq foo@gottpoff(%rax), %rax
5515 nopw 0x0(%rax,%rax,1) */
5517 if (ABI_64_P (output_bfd))
5519 if (contents[roff + 5] == 0xb8)
5521 memcpy (contents + roff - 3,
5522 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
5523 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5527 memcpy (contents + roff - 4,
5528 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5532 memcpy (contents + roff - 3,
5533 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5536 relocation = (htab->elf.sgot->output_section->vma
5537 + htab->elf.sgot->output_offset + off
5540 - input_section->output_section->vma
5541 - input_section->output_offset
5543 bfd_put_32 (output_bfd, relocation,
5544 contents + roff + 8 + largepic);
5545 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
5550 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
5552 /* GDesc -> IE transition.
5553 It's originally something like:
5554 leaq x@tlsdesc(%rip), %rax
5557 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
5559 /* Now modify the instruction as appropriate. To
5560 turn a leaq into a movq in the form we use it, it
5561 suffices to change the second byte from 0x8d to
5563 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
5565 bfd_put_32 (output_bfd,
5566 htab->elf.sgot->output_section->vma
5567 + htab->elf.sgot->output_offset + off
5569 - input_section->output_section->vma
5570 - input_section->output_offset
5575 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
5577 /* GDesc -> IE transition.
5584 bfd_put_8 (output_bfd, 0x66, contents + roff);
5585 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5593 case R_X86_64_TLSLD:
5594 if (! elf_x86_64_tls_transition (info, input_bfd,
5595 input_section, contents,
5596 symtab_hdr, sym_hashes,
5597 &r_type, GOT_UNKNOWN, rel,
5598 relend, h, r_symndx, TRUE))
5601 if (r_type != R_X86_64_TLSLD)
5603 /* LD->LE transition:
5604 leaq foo@tlsld(%rip), %rdi
5605 call __tls_get_addr@PLT
5606 For 64bit, we change it into:
5607 .word 0x6666; .byte 0x66; movq %fs:0, %rax
5608 For 32bit, we change it into:
5609 nopl 0x0(%rax); movl %fs:0, %eax
5611 leaq foo@tlsld(%rip), %rdi;
5612 call *__tls_get_addr@GOTPCREL(%rip)
5613 which may be converted to
5614 addr32 call __tls_get_addr
5615 For 64bit, we change it into:
5616 .word 0x6666; .word 0x6666; movq %fs:0, %rax
5617 For 32bit, we change it into:
5618 nopw 0x0(%rax); movl %fs:0, %eax
5619 For largepic, change:
5620 leaq foo@tlsgd(%rip), %rdi
5621 movabsq $__tls_get_addr@pltoff, %rax
5625 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
5628 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
5629 if (ABI_64_P (output_bfd))
5631 if (contents[rel->r_offset + 5] == 0xb8)
5632 memcpy (contents + rel->r_offset - 3,
5633 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
5634 "\x64\x48\x8b\x04\x25\0\0\0", 22);
5635 else if (contents[rel->r_offset + 4] == 0xff
5636 || contents[rel->r_offset + 4] == 0x67)
5637 memcpy (contents + rel->r_offset - 3,
5638 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
5641 memcpy (contents + rel->r_offset - 3,
5642 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
5646 if (contents[rel->r_offset + 4] == 0xff)
5647 memcpy (contents + rel->r_offset - 3,
5648 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
5651 memcpy (contents + rel->r_offset - 3,
5652 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5654 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
5655 and R_X86_64_PLTOFF64. */
5661 if (htab->elf.sgot == NULL)
5664 off = htab->tls_ld_got.offset;
5669 Elf_Internal_Rela outrel;
5671 if (htab->elf.srelgot == NULL)
5674 outrel.r_offset = (htab->elf.sgot->output_section->vma
5675 + htab->elf.sgot->output_offset + off);
5677 bfd_put_64 (output_bfd, 0,
5678 htab->elf.sgot->contents + off);
5679 bfd_put_64 (output_bfd, 0,
5680 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5681 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
5682 outrel.r_addend = 0;
5683 elf_append_rela (output_bfd, htab->elf.srelgot,
5685 htab->tls_ld_got.offset |= 1;
5687 relocation = htab->elf.sgot->output_section->vma
5688 + htab->elf.sgot->output_offset + off;
5689 unresolved_reloc = FALSE;
5692 case R_X86_64_DTPOFF32:
5693 if (!bfd_link_executable (info)
5694 || (input_section->flags & SEC_CODE) == 0)
5695 relocation -= elf_x86_64_dtpoff_base (info);
5697 relocation = elf_x86_64_tpoff (info, relocation);
5700 case R_X86_64_TPOFF32:
5701 case R_X86_64_TPOFF64:
5702 BFD_ASSERT (bfd_link_executable (info));
5703 relocation = elf_x86_64_tpoff (info, relocation);
5706 case R_X86_64_DTPOFF64:
5707 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
5708 relocation -= elf_x86_64_dtpoff_base (info);
5715 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5716 because such sections are not SEC_ALLOC and thus ld.so will
5717 not process them. */
5718 if (unresolved_reloc
5719 && !((input_section->flags & SEC_DEBUGGING) != 0
5721 && _bfd_elf_section_offset (output_bfd, info, input_section,
5722 rel->r_offset) != (bfd_vma) -1)
5727 if (info->nocopyreloc
5728 && !(h->root.u.def.section->flags & SEC_CODE))
5729 return elf_x86_64_need_pic (info, input_bfd, input_section,
5730 h, NULL, NULL, howto);
5735 /* xgettext:c-format */
5736 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
5741 h->root.root.string);
5747 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5748 contents, rel->r_offset,
5749 relocation, rel->r_addend);
5751 check_relocation_error:
5752 if (r != bfd_reloc_ok)
5757 name = h->root.root.string;
5760 name = bfd_elf_string_from_elf_section (input_bfd,
5761 symtab_hdr->sh_link,
5766 name = bfd_section_name (input_bfd, sec);
5769 if (r == bfd_reloc_overflow)
5770 (*info->callbacks->reloc_overflow)
5771 (info, (h ? &h->root : NULL), name, howto->name,
5772 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5776 /* xgettext:c-format */
5777 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
5778 input_bfd, input_section,
5779 rel->r_offset, name, (int) r);
5790 Elf_Internal_Shdr *rel_hdr;
5791 size_t deleted = rel - wrel;
5793 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5794 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5795 if (rel_hdr->sh_size == 0)
5797 /* It is too late to remove an empty reloc section. Leave
5799 ??? What is wrong with an empty section??? */
5800 rel_hdr->sh_size = rel_hdr->sh_entsize;
5803 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5804 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5805 input_section->reloc_count -= deleted;
5811 /* Finish up dynamic symbol handling. We set the contents of various
5812 dynamic sections here. */
5815 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
5816 struct bfd_link_info *info,
5817 struct elf_link_hash_entry *h,
5818 Elf_Internal_Sym *sym)
5820 struct elf_x86_64_link_hash_table *htab;
5821 bfd_boolean use_plt_second;
5822 struct elf_x86_64_link_hash_entry *eh;
5823 bfd_boolean local_undefweak;
5825 htab = elf_x86_64_hash_table (info);
5829 /* Use the second PLT section only if there is .plt section. */
5830 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
5832 eh = (struct elf_x86_64_link_hash_entry *) h;
5833 if (eh->no_finish_dynamic_symbol)
5836 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5837 resolved undefined weak symbols in executable so that their
5838 references have value 0 at run-time. */
5839 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
5843 if (h->plt.offset != (bfd_vma) -1)
5846 bfd_vma got_offset, plt_offset;
5847 Elf_Internal_Rela rela;
5849 asection *plt, *gotplt, *relplt, *resolved_plt;
5850 const struct elf_backend_data *bed;
5851 bfd_vma plt_got_pcrel_offset;
5853 /* When building a static executable, use .iplt, .igot.plt and
5854 .rela.iplt sections for STT_GNU_IFUNC symbols. */
5855 if (htab->elf.splt != NULL)
5857 plt = htab->elf.splt;
5858 gotplt = htab->elf.sgotplt;
5859 relplt = htab->elf.srelplt;
5863 plt = htab->elf.iplt;
5864 gotplt = htab->elf.igotplt;
5865 relplt = htab->elf.irelplt;
5868 /* This symbol has an entry in the procedure linkage table. Set
5870 if ((h->dynindx == -1
5872 && !((h->forced_local || bfd_link_executable (info))
5874 && h->type == STT_GNU_IFUNC))
5880 /* Get the index in the procedure linkage table which
5881 corresponds to this symbol. This is the index of this symbol
5882 in all the symbols for which we are making plt entries. The
5883 first entry in the procedure linkage table is reserved.
5885 Get the offset into the .got table of the entry that
5886 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5887 bytes. The first three are reserved for the dynamic linker.
5889 For static executables, we don't reserve anything. */
5891 if (plt == htab->elf.splt)
5893 got_offset = (h->plt.offset / htab->plt.plt_entry_size
5894 - htab->plt.has_plt0);
5895 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
5899 got_offset = h->plt.offset / htab->plt.plt_entry_size;
5900 got_offset = got_offset * GOT_ENTRY_SIZE;
5903 /* Fill in the entry in the procedure linkage table. */
5904 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
5905 htab->plt.plt_entry_size);
5908 memcpy (htab->plt_second->contents + eh->plt_second.offset,
5909 htab->non_lazy_plt->plt_entry,
5910 htab->non_lazy_plt->plt_entry_size);
5912 resolved_plt = htab->plt_second;
5913 plt_offset = eh->plt_second.offset;
5918 plt_offset = h->plt.offset;
5921 /* Insert the relocation positions of the plt section. */
5923 /* Put offset the PC-relative instruction referring to the GOT entry,
5924 subtracting the size of that instruction. */
5925 plt_got_pcrel_offset = (gotplt->output_section->vma
5926 + gotplt->output_offset
5928 - resolved_plt->output_section->vma
5929 - resolved_plt->output_offset
5931 - htab->plt.plt_got_insn_size);
5933 /* Check PC-relative offset overflow in PLT entry. */
5934 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
5935 /* xgettext:c-format */
5936 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5937 output_bfd, h->root.root.string);
5939 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
5940 (resolved_plt->contents + plt_offset
5941 + htab->plt.plt_got_offset));
5943 /* Fill in the entry in the global offset table, initially this
5944 points to the second part of the PLT entry. Leave the entry
5945 as zero for undefined weak symbol in PIE. No PLT relocation
5946 against undefined weak symbol in PIE. */
5947 if (!local_undefweak)
5949 if (htab->plt.has_plt0)
5950 bfd_put_64 (output_bfd, (plt->output_section->vma
5951 + plt->output_offset
5953 + htab->lazy_plt->plt_lazy_offset),
5954 gotplt->contents + got_offset);
5956 /* Fill in the entry in the .rela.plt section. */
5957 rela.r_offset = (gotplt->output_section->vma
5958 + gotplt->output_offset
5960 if (h->dynindx == -1
5961 || ((bfd_link_executable (info)
5962 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5964 && h->type == STT_GNU_IFUNC))
5966 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5967 h->root.root.string,
5968 h->root.u.def.section->owner);
5970 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5971 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5972 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
5973 rela.r_addend = (h->root.u.def.value
5974 + h->root.u.def.section->output_section->vma
5975 + h->root.u.def.section->output_offset);
5976 /* R_X86_64_IRELATIVE comes last. */
5977 plt_index = htab->next_irelative_index--;
5981 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
5983 plt_index = htab->next_jump_slot_index++;
5986 /* Don't fill the second and third slots in PLT entry for
5987 static executables nor without PLT0. */
5988 if (plt == htab->elf.splt && htab->plt.has_plt0)
5991 = h->plt.offset + htab->lazy_plt->plt_plt_insn_end;
5993 /* Put relocation index. */
5994 bfd_put_32 (output_bfd, plt_index,
5995 (plt->contents + h->plt.offset
5996 + htab->lazy_plt->plt_reloc_offset));
5998 /* Put offset for jmp .PLT0 and check for overflow. We don't
5999 check relocation index for overflow since branch displacement
6000 will overflow first. */
6001 if (plt0_offset > 0x80000000)
6002 /* xgettext:c-format */
6003 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
6004 output_bfd, h->root.root.string);
6005 bfd_put_32 (output_bfd, - plt0_offset,
6006 (plt->contents + h->plt.offset
6007 + htab->lazy_plt->plt_plt_offset));
6010 bed = get_elf_backend_data (output_bfd);
6011 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
6012 bed->s->swap_reloca_out (output_bfd, &rela, loc);
6015 else if (eh->plt_got.offset != (bfd_vma) -1)
6017 bfd_vma got_offset, plt_offset;
6018 asection *plt, *got;
6019 bfd_boolean got_after_plt;
6020 int32_t got_pcrel_offset;
6022 /* Set the entry in the GOT procedure linkage table. */
6023 plt = htab->plt_got;
6024 got = htab->elf.sgot;
6025 got_offset = h->got.offset;
6027 if (got_offset == (bfd_vma) -1
6028 || (h->type == STT_GNU_IFUNC && h->def_regular)
6033 /* Use the non-lazy PLT entry template for the GOT PLT since they
6034 are the identical. */
6035 /* Fill in the entry in the GOT procedure linkage table. */
6036 plt_offset = eh->plt_got.offset;
6037 memcpy (plt->contents + plt_offset,
6038 htab->non_lazy_plt->plt_entry,
6039 htab->non_lazy_plt->plt_entry_size);
6041 /* Put offset the PC-relative instruction referring to the GOT
6042 entry, subtracting the size of that instruction. */
6043 got_pcrel_offset = (got->output_section->vma
6044 + got->output_offset
6046 - plt->output_section->vma
6047 - plt->output_offset
6049 - htab->non_lazy_plt->plt_got_insn_size);
6051 /* Check PC-relative offset overflow in GOT PLT entry. */
6052 got_after_plt = got->output_section->vma > plt->output_section->vma;
6053 if ((got_after_plt && got_pcrel_offset < 0)
6054 || (!got_after_plt && got_pcrel_offset > 0))
6055 /* xgettext:c-format */
6056 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
6057 output_bfd, h->root.root.string);
6059 bfd_put_32 (output_bfd, got_pcrel_offset,
6060 (plt->contents + plt_offset
6061 + htab->non_lazy_plt->plt_got_offset));
6064 if (!local_undefweak
6066 && (h->plt.offset != (bfd_vma) -1
6067 || eh->plt_got.offset != (bfd_vma) -1))
6069 /* Mark the symbol as undefined, rather than as defined in
6070 the .plt section. Leave the value if there were any
6071 relocations where pointer equality matters (this is a clue
6072 for the dynamic linker, to make function pointer
6073 comparisons work between an application and shared
6074 library), otherwise set it to zero. If a function is only
6075 called from a binary, there is no need to slow down
6076 shared libraries because of that. */
6077 sym->st_shndx = SHN_UNDEF;
6078 if (!h->pointer_equality_needed)
6082 /* Don't generate dynamic GOT relocation against undefined weak
6083 symbol in executable. */
6084 if (h->got.offset != (bfd_vma) -1
6085 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
6086 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE
6087 && !local_undefweak)
6089 Elf_Internal_Rela rela;
6090 asection *relgot = htab->elf.srelgot;
6092 /* This symbol has an entry in the global offset table. Set it
6094 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
6097 rela.r_offset = (htab->elf.sgot->output_section->vma
6098 + htab->elf.sgot->output_offset
6099 + (h->got.offset &~ (bfd_vma) 1));
6101 /* If this is a static link, or it is a -Bsymbolic link and the
6102 symbol is defined locally or was forced to be local because
6103 of a version file, we just want to emit a RELATIVE reloc.
6104 The entry in the global offset table will already have been
6105 initialized in the relocate_section function. */
6107 && h->type == STT_GNU_IFUNC)
6109 if (h->plt.offset == (bfd_vma) -1)
6111 /* STT_GNU_IFUNC is referenced without PLT. */
6112 if (htab->elf.splt == NULL)
6114 /* use .rel[a].iplt section to store .got relocations
6115 in static executable. */
6116 relgot = htab->elf.irelplt;
6118 if (SYMBOL_REFERENCES_LOCAL (info, h))
6120 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
6122 h->root.root.string,
6123 h->root.u.def.section->owner);
6125 rela.r_info = htab->r_info (0,
6126 R_X86_64_IRELATIVE);
6127 rela.r_addend = (h->root.u.def.value
6128 + h->root.u.def.section->output_section->vma
6129 + h->root.u.def.section->output_offset);
6134 else if (bfd_link_pic (info))
6136 /* Generate R_X86_64_GLOB_DAT. */
6144 if (!h->pointer_equality_needed)
6147 /* For non-shared object, we can't use .got.plt, which
6148 contains the real function addres if we need pointer
6149 equality. We load the GOT entry with the PLT entry. */
6150 if (htab->plt_second != NULL)
6152 plt = htab->plt_second;
6153 plt_offset = eh->plt_second.offset;
6157 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
6158 plt_offset = h->plt.offset;
6160 bfd_put_64 (output_bfd, (plt->output_section->vma
6161 + plt->output_offset
6163 htab->elf.sgot->contents + h->got.offset);
6167 else if (bfd_link_pic (info)
6168 && SYMBOL_REFERENCES_LOCAL (info, h))
6170 if (!h->def_regular)
6172 BFD_ASSERT((h->got.offset & 1) != 0);
6173 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
6174 rela.r_addend = (h->root.u.def.value
6175 + h->root.u.def.section->output_section->vma
6176 + h->root.u.def.section->output_offset);
6180 BFD_ASSERT((h->got.offset & 1) == 0);
6182 bfd_put_64 (output_bfd, (bfd_vma) 0,
6183 htab->elf.sgot->contents + h->got.offset);
6184 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
6188 elf_append_rela (output_bfd, relgot, &rela);
6193 Elf_Internal_Rela rela;
6196 /* This symbol needs a copy reloc. Set it up. */
6198 if (h->dynindx == -1
6199 || (h->root.type != bfd_link_hash_defined
6200 && h->root.type != bfd_link_hash_defweak)
6201 || htab->elf.srelbss == NULL
6202 || htab->elf.sreldynrelro == NULL)
6205 rela.r_offset = (h->root.u.def.value
6206 + h->root.u.def.section->output_section->vma
6207 + h->root.u.def.section->output_offset);
6208 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
6210 if (h->root.u.def.section == htab->elf.sdynrelro)
6211 s = htab->elf.sreldynrelro;
6213 s = htab->elf.srelbss;
6214 elf_append_rela (output_bfd, s, &rela);
6220 /* Finish up local dynamic symbol handling. We set the contents of
6221 various dynamic sections here. */
6224 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
6226 struct elf_link_hash_entry *h
6227 = (struct elf_link_hash_entry *) *slot;
6228 struct bfd_link_info *info
6229 = (struct bfd_link_info *) inf;
6231 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
6235 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
6236 here since undefined weak symbol may not be dynamic and may not be
6237 called for elf_x86_64_finish_dynamic_symbol. */
6240 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
6243 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
6244 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6246 if (h->root.type != bfd_link_hash_undefweak
6247 || h->dynindx != -1)
6250 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
6254 /* Used to decide how to sort relocs in an optimal manner for the
6255 dynamic linker, before writing them out. */
6257 static enum elf_reloc_type_class
6258 elf_x86_64_reloc_type_class (const struct bfd_link_info *info,
6259 const asection *rel_sec ATTRIBUTE_UNUSED,
6260 const Elf_Internal_Rela *rela)
6262 bfd *abfd = info->output_bfd;
6263 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6264 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
6266 if (htab->elf.dynsym != NULL
6267 && htab->elf.dynsym->contents != NULL)
6269 /* Check relocation against STT_GNU_IFUNC symbol if there are
6271 unsigned long r_symndx = htab->r_sym (rela->r_info);
6272 if (r_symndx != STN_UNDEF)
6274 Elf_Internal_Sym sym;
6275 if (!bed->s->swap_symbol_in (abfd,
6276 (htab->elf.dynsym->contents
6277 + r_symndx * bed->s->sizeof_sym),
6281 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
6282 return reloc_class_ifunc;
6286 switch ((int) ELF32_R_TYPE (rela->r_info))
6288 case R_X86_64_IRELATIVE:
6289 return reloc_class_ifunc;
6290 case R_X86_64_RELATIVE:
6291 case R_X86_64_RELATIVE64:
6292 return reloc_class_relative;
6293 case R_X86_64_JUMP_SLOT:
6294 return reloc_class_plt;
6296 return reloc_class_copy;
6298 return reloc_class_normal;
6302 /* Finish up the dynamic sections. */
6305 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
6306 struct bfd_link_info *info)
6308 struct elf_x86_64_link_hash_table *htab;
6312 htab = elf_x86_64_hash_table (info);
6316 dynobj = htab->elf.dynobj;
6317 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
6319 if (htab->elf.dynamic_sections_created)
6321 bfd_byte *dyncon, *dynconend;
6322 const struct elf_backend_data *bed;
6323 bfd_size_type sizeof_dyn;
6325 if (sdyn == NULL || htab->elf.sgot == NULL)
6328 bed = get_elf_backend_data (dynobj);
6329 sizeof_dyn = bed->s->sizeof_dyn;
6330 dyncon = sdyn->contents;
6331 dynconend = sdyn->contents + sdyn->size;
6332 for (; dyncon < dynconend; dyncon += sizeof_dyn)
6334 Elf_Internal_Dyn dyn;
6337 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
6345 s = htab->elf.sgotplt;
6346 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6350 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
6354 s = htab->elf.srelplt->output_section;
6355 dyn.d_un.d_val = s->size;
6358 case DT_TLSDESC_PLT:
6360 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
6361 + htab->tlsdesc_plt;
6364 case DT_TLSDESC_GOT:
6366 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
6367 + htab->tlsdesc_got;
6371 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
6374 if (htab->elf.splt && htab->elf.splt->size > 0)
6376 elf_section_data (htab->elf.splt->output_section)
6377 ->this_hdr.sh_entsize = htab->plt.plt_entry_size;
6379 if (htab->plt.has_plt0)
6381 /* Fill in the special first entry in the procedure linkage
6383 memcpy (htab->elf.splt->contents,
6384 htab->lazy_plt->plt0_entry,
6385 htab->lazy_plt->plt_entry_size);
6386 /* Add offset for pushq GOT+8(%rip), since the instruction
6387 uses 6 bytes subtract this value. */
6388 bfd_put_32 (output_bfd,
6389 (htab->elf.sgotplt->output_section->vma
6390 + htab->elf.sgotplt->output_offset
6392 - htab->elf.splt->output_section->vma
6393 - htab->elf.splt->output_offset
6395 (htab->elf.splt->contents
6396 + htab->lazy_plt->plt0_got1_offset));
6397 /* Add offset for the PC-relative instruction accessing
6398 GOT+16, subtracting the offset to the end of that
6400 bfd_put_32 (output_bfd,
6401 (htab->elf.sgotplt->output_section->vma
6402 + htab->elf.sgotplt->output_offset
6404 - htab->elf.splt->output_section->vma
6405 - htab->elf.splt->output_offset
6406 - htab->lazy_plt->plt0_got2_insn_end),
6407 (htab->elf.splt->contents
6408 + htab->lazy_plt->plt0_got2_offset));
6410 if (htab->tlsdesc_plt)
6412 bfd_put_64 (output_bfd, (bfd_vma) 0,
6413 htab->elf.sgot->contents + htab->tlsdesc_got);
6415 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
6416 htab->lazy_plt->plt0_entry,
6417 htab->lazy_plt->plt_entry_size);
6419 /* Add offset for pushq GOT+8(%rip), since the
6420 instruction uses 6 bytes subtract this value. */
6421 bfd_put_32 (output_bfd,
6422 (htab->elf.sgotplt->output_section->vma
6423 + htab->elf.sgotplt->output_offset
6425 - htab->elf.splt->output_section->vma
6426 - htab->elf.splt->output_offset
6429 (htab->elf.splt->contents
6431 + htab->lazy_plt->plt0_got1_offset));
6432 /* Add offset for the PC-relative instruction accessing
6433 GOT+TDG, where TDG stands for htab->tlsdesc_got,
6434 subtracting the offset to the end of that
6436 bfd_put_32 (output_bfd,
6437 (htab->elf.sgot->output_section->vma
6438 + htab->elf.sgot->output_offset
6440 - htab->elf.splt->output_section->vma
6441 - htab->elf.splt->output_offset
6443 - htab->lazy_plt->plt0_got2_insn_end),
6444 (htab->elf.splt->contents
6446 + htab->lazy_plt->plt0_got2_offset));
6452 if (htab->plt_got != NULL && htab->plt_got->size > 0)
6453 elf_section_data (htab->plt_got->output_section)
6454 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
6456 if (htab->plt_second != NULL && htab->plt_second->size > 0)
6457 elf_section_data (htab->plt_second->output_section)
6458 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
6460 /* GOT is always created in setup_gnu_properties. But it may not be
6462 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
6464 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
6467 (_("discarded output section: `%A'"), htab->elf.sgotplt);
6471 /* Set the first entry in the global offset table to the address of
6472 the dynamic section. */
6474 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
6476 bfd_put_64 (output_bfd,
6477 sdyn->output_section->vma + sdyn->output_offset,
6478 htab->elf.sgotplt->contents);
6479 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6480 bfd_put_64 (output_bfd, (bfd_vma) 0,
6481 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
6482 bfd_put_64 (output_bfd, (bfd_vma) 0,
6483 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
6485 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize
6489 /* Adjust .eh_frame for .plt section. */
6490 if (htab->plt_eh_frame != NULL
6491 && htab->plt_eh_frame->contents != NULL)
6493 if (htab->elf.splt != NULL
6494 && htab->elf.splt->size != 0
6495 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
6496 && htab->elf.splt->output_section != NULL
6497 && htab->plt_eh_frame->output_section != NULL)
6499 bfd_vma plt_start = htab->elf.splt->output_section->vma;
6500 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
6501 + htab->plt_eh_frame->output_offset
6502 + PLT_FDE_START_OFFSET;
6503 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6504 htab->plt_eh_frame->contents
6505 + PLT_FDE_START_OFFSET);
6507 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
6509 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6511 htab->plt_eh_frame->contents))
6516 /* Adjust .eh_frame for .plt.got section. */
6517 if (htab->plt_got_eh_frame != NULL
6518 && htab->plt_got_eh_frame->contents != NULL)
6520 if (htab->plt_got != NULL
6521 && htab->plt_got->size != 0
6522 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
6523 && htab->plt_got->output_section != NULL
6524 && htab->plt_got_eh_frame->output_section != NULL)
6526 bfd_vma plt_start = htab->plt_got->output_section->vma;
6527 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
6528 + htab->plt_got_eh_frame->output_offset
6529 + PLT_FDE_START_OFFSET;
6530 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6531 htab->plt_got_eh_frame->contents
6532 + PLT_FDE_START_OFFSET);
6534 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
6536 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6537 htab->plt_got_eh_frame,
6538 htab->plt_got_eh_frame->contents))
6543 /* Adjust .eh_frame for the second PLT section. */
6544 if (htab->plt_second_eh_frame != NULL
6545 && htab->plt_second_eh_frame->contents != NULL)
6547 if (htab->plt_second != NULL
6548 && htab->plt_second->size != 0
6549 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
6550 && htab->plt_second->output_section != NULL
6551 && htab->plt_second_eh_frame->output_section != NULL)
6553 bfd_vma plt_start = htab->plt_second->output_section->vma;
6554 bfd_vma eh_frame_start
6555 = (htab->plt_second_eh_frame->output_section->vma
6556 + htab->plt_second_eh_frame->output_offset
6557 + PLT_FDE_START_OFFSET);
6558 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6559 htab->plt_second_eh_frame->contents
6560 + PLT_FDE_START_OFFSET);
6562 if (htab->plt_second_eh_frame->sec_info_type
6563 == SEC_INFO_TYPE_EH_FRAME)
6565 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6566 htab->plt_second_eh_frame,
6567 htab->plt_second_eh_frame->contents))
6572 if (htab->elf.sgot && htab->elf.sgot->size > 0)
6573 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
6576 /* Fill PLT entries for undefined weak symbols in PIE. */
6577 if (bfd_link_pie (info))
6578 bfd_hash_traverse (&info->hash->table,
6579 elf_x86_64_pie_finish_undefweak_symbol,
6585 /* Fill PLT/GOT entries and allocate dynamic relocations for local
6586 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
6587 It has to be done before elf_link_sort_relocs is called so that
6588 dynamic relocations are properly sorted. */
6591 elf_x86_64_output_arch_local_syms
6592 (bfd *output_bfd ATTRIBUTE_UNUSED,
6593 struct bfd_link_info *info,
6594 void *flaginfo ATTRIBUTE_UNUSED,
6595 int (*func) (void *, const char *,
6598 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
6600 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
6604 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6605 htab_traverse (htab->loc_hash_table,
6606 elf_x86_64_finish_local_dynamic_symbol,
6612 /* Sort relocs into address order. */
6615 compare_relocs (const void *ap, const void *bp)
6617 const arelent *a = * (const arelent **) ap;
6618 const arelent *b = * (const arelent **) bp;
6620 if (a->address > b->address)
6622 else if (a->address < b->address)
6628 enum elf_x86_64_plt_type
6632 plt_second = 1 << 1,
6636 struct elf_x86_64_plt
6641 enum elf_x86_64_plt_type type;
6642 unsigned int plt_got_offset;
6643 unsigned int plt_got_insn_size;
6644 unsigned int plt_entry_size;
6648 /* Forward declaration. */
6649 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt;
6651 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
6652 dynamic relocations. */
6655 elf_x86_64_get_synthetic_symtab (bfd *abfd,
6656 long symcount ATTRIBUTE_UNUSED,
6657 asymbol **syms ATTRIBUTE_UNUSED,
6662 long size, count, i, n, len;
6664 unsigned int plt_got_offset, plt_entry_size, plt_got_insn_size;
6666 bfd_byte *plt_contents;
6667 long dynrelcount, relsize;
6668 arelent **dynrelbuf, *p;
6669 const struct elf_x86_64_lazy_plt_layout *lazy_plt;
6670 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt;
6671 const struct elf_x86_64_lazy_plt_layout *lazy_bnd_plt;
6672 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_bnd_plt;
6673 const struct elf_x86_64_lazy_plt_layout *lazy_ibt_plt;
6674 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_ibt_plt;
6677 enum elf_x86_64_plt_type plt_type;
6678 struct elf_x86_64_plt plts[] =
6680 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
6681 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
6682 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
6683 { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 },
6684 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
6689 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
6692 if (dynsymcount <= 0)
6695 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
6699 dynrelbuf = (arelent **) bfd_malloc (relsize);
6700 if (dynrelbuf == NULL)
6703 dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf,
6706 /* Sort the relocs by address. */
6707 qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs);
6709 if (get_elf_x86_64_backend_data (abfd)->os == is_normal)
6711 lazy_plt = &elf_x86_64_lazy_plt;
6712 non_lazy_plt = &elf_x86_64_non_lazy_plt;
6713 lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt;
6714 non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt;
6715 if (ABI_64_P (abfd))
6717 lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt;
6718 non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt;
6722 lazy_ibt_plt = &elf_x32_lazy_ibt_plt;
6723 non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt;
6728 lazy_plt = &elf_x86_64_nacl_plt;
6729 non_lazy_plt = NULL;
6730 lazy_bnd_plt = NULL;
6731 non_lazy_bnd_plt = NULL;
6732 lazy_ibt_plt = NULL;
6733 non_lazy_ibt_plt = NULL;
6737 for (j = 0; plts[j].name != NULL; j++)
6739 plt = bfd_get_section_by_name (abfd, plts[j].name);
6743 /* Get the PLT section contents. */
6744 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
6745 if (plt_contents == NULL)
6747 if (!bfd_get_section_contents (abfd, (asection *) plt,
6748 plt_contents, 0, plt->size))
6750 free (plt_contents);
6754 /* Check what kind of PLT it is. */
6755 plt_type = plt_unknown;
6756 if (plts[j].type == plt_unknown)
6758 /* Match lazy PLT first. Need to check the first two
6760 if ((memcmp (plt_contents, lazy_plt->plt0_entry,
6761 lazy_plt->plt0_got1_offset) == 0)
6762 && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6,
6764 plt_type = plt_lazy;
6765 else if (lazy_bnd_plt != NULL
6766 && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry,
6767 lazy_bnd_plt->plt0_got1_offset) == 0)
6768 && (memcmp (plt_contents + 6,
6769 lazy_bnd_plt->plt0_entry + 6, 3) == 0))
6771 plt_type = plt_lazy | plt_second;
6772 /* The fist entry in the lazy IBT PLT is the same as the
6774 if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size,
6775 lazy_ibt_plt->plt_entry,
6776 lazy_ibt_plt->plt_got_offset) == 0))
6777 lazy_plt = lazy_ibt_plt;
6779 lazy_plt = lazy_bnd_plt;
6783 if (non_lazy_plt != NULL
6784 && (plt_type == plt_unknown || plt_type == plt_non_lazy))
6786 /* Match non-lazy PLT. */
6787 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
6788 non_lazy_plt->plt_got_offset) == 0)
6789 plt_type = plt_non_lazy;
6792 if (plt_type == plt_unknown || plt_type == plt_second)
6794 if (non_lazy_bnd_plt != NULL
6795 && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry,
6796 non_lazy_bnd_plt->plt_got_offset) == 0))
6798 /* Match BND PLT. */
6799 plt_type = plt_second;
6800 non_lazy_plt = non_lazy_bnd_plt;
6802 else if (non_lazy_ibt_plt != NULL
6803 && (memcmp (plt_contents,
6804 non_lazy_ibt_plt->plt_entry,
6805 non_lazy_ibt_plt->plt_got_offset) == 0))
6807 /* Match IBT PLT. */
6808 plt_type = plt_second;
6809 non_lazy_plt = non_lazy_ibt_plt;
6813 if (plt_type == plt_unknown)
6817 plts[j].type = plt_type;
6819 if ((plt_type & plt_lazy))
6821 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
6822 plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size;
6823 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
6824 /* Skip PLT0 in lazy PLT. */
6829 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
6830 plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size;
6831 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
6835 /* Skip lazy PLT when the second PLT is used. */
6836 if (plt_type == (plt_lazy | plt_second))
6840 n = plt->size / plts[j].plt_entry_size;
6845 plts[j].contents = plt_contents;
6848 size = count * sizeof (asymbol);
6850 /* Allocate space for @plt suffixes. */
6852 for (i = 0; i < dynrelcount; i++)
6855 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
6857 size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd);
6860 s = *ret = (asymbol *) bfd_zmalloc (size);
6864 for (j = 0; plts[j].name != NULL; j++)
6865 if (plts[j].contents != NULL)
6866 free (plts[j].contents);
6871 /* Check for each PLT section. */
6872 names = (char *) (s + count);
6875 for (j = 0; plts[j].name != NULL; j++)
6876 if ((plt_contents = plts[j].contents) != NULL)
6881 plt_got_offset = plts[j].plt_got_offset;
6882 plt_got_insn_size = plts[j].plt_got_insn_size;
6883 plt_entry_size = plts[j].plt_entry_size;
6887 if ((plts[j].type & plt_lazy))
6889 /* Skip PLT0 in lazy PLT. */
6891 offset = plt_entry_size;
6899 /* Check each PLT entry against dynamic relocations. */
6900 for (; k < plts[j].count; k++)
6906 /* Get the PC-relative offset, a signed 32-bit integer. */
6907 off = H_GET_32 (abfd, (plt_contents + offset
6909 got_vma = plt->vma + offset + off + plt_got_insn_size;
6911 /* Binary search. */
6915 while ((min + 1) < max)
6919 mid = (min + max) / 2;
6921 if (got_vma > r->address)
6923 else if (got_vma < r->address)
6932 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6933 if (got_vma == p->address
6935 && (p->howto->type == R_X86_64_JUMP_SLOT
6936 || p->howto->type == R_X86_64_GLOB_DAT
6937 || p->howto->type == R_X86_64_IRELATIVE))
6939 *s = **p->sym_ptr_ptr;
6940 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
6941 set. Since we are defining a symbol, ensure one
6943 if ((s->flags & BSF_LOCAL) == 0)
6944 s->flags |= BSF_GLOBAL;
6945 s->flags |= BSF_SYNTHETIC;
6946 /* This is no longer a section symbol. */
6947 s->flags &= ~BSF_SECTION_SYM;
6949 s->the_bfd = plt->owner;
6953 len = strlen ((*p->sym_ptr_ptr)->name);
6954 memcpy (names, (*p->sym_ptr_ptr)->name, len);
6960 memcpy (names, "+0x", sizeof ("+0x") - 1);
6961 names += sizeof ("+0x") - 1;
6962 bfd_sprintf_vma (abfd, buf, p->addend);
6963 for (a = buf; *a == '0'; ++a)
6966 memcpy (names, a, size);
6969 memcpy (names, "@plt", sizeof ("@plt"));
6970 names += sizeof ("@plt");
6974 offset += plt_entry_size;
6978 /* PLT entries with R_X86_64_TLSDESC relocations are skipped. */
6984 for (j = 0; plts[j].name != NULL; j++)
6985 if (plts[j].contents != NULL)
6986 free (plts[j].contents);
6993 /* Handle an x86-64 specific section when reading an object file. This
6994 is called when elfcode.h finds a section with an unknown type. */
6997 elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
6998 const char *name, int shindex)
7000 if (hdr->sh_type != SHT_X86_64_UNWIND)
7003 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
7009 /* Hook called by the linker routine which adds symbols from an object
7010 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
7014 elf_x86_64_add_symbol_hook (bfd *abfd,
7015 struct bfd_link_info *info ATTRIBUTE_UNUSED,
7016 Elf_Internal_Sym *sym,
7017 const char **namep ATTRIBUTE_UNUSED,
7018 flagword *flagsp ATTRIBUTE_UNUSED,
7024 switch (sym->st_shndx)
7026 case SHN_X86_64_LCOMMON:
7027 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
7030 lcomm = bfd_make_section_with_flags (abfd,
7034 | SEC_LINKER_CREATED));
7037 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
7040 *valp = sym->st_size;
7048 /* Given a BFD section, try to locate the corresponding ELF section
7052 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
7053 asection *sec, int *index_return)
7055 if (sec == &_bfd_elf_large_com_section)
7057 *index_return = SHN_X86_64_LCOMMON;
7063 /* Process a symbol. */
7066 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
7069 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
7071 switch (elfsym->internal_elf_sym.st_shndx)
7073 case SHN_X86_64_LCOMMON:
7074 asym->section = &_bfd_elf_large_com_section;
7075 asym->value = elfsym->internal_elf_sym.st_size;
7076 /* Common symbol doesn't set BSF_GLOBAL. */
7077 asym->flags &= ~BSF_GLOBAL;
7083 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
7085 return (sym->st_shndx == SHN_COMMON
7086 || sym->st_shndx == SHN_X86_64_LCOMMON);
7090 elf_x86_64_common_section_index (asection *sec)
7092 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
7095 return SHN_X86_64_LCOMMON;
7099 elf_x86_64_common_section (asection *sec)
7101 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
7102 return bfd_com_section_ptr;
7104 return &_bfd_elf_large_com_section;
7108 elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
7109 const Elf_Internal_Sym *sym,
7114 const asection *oldsec)
7116 /* A normal common symbol and a large common symbol result in a
7117 normal common symbol. We turn the large common symbol into a
7120 && h->root.type == bfd_link_hash_common
7122 && bfd_is_com_section (*psec)
7125 if (sym->st_shndx == SHN_COMMON
7126 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
7128 h->root.u.c.p->section
7129 = bfd_make_section_old_way (oldbfd, "COMMON");
7130 h->root.u.c.p->section->flags = SEC_ALLOC;
7132 else if (sym->st_shndx == SHN_X86_64_LCOMMON
7133 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
7134 *psec = bfd_com_section_ptr;
7141 elf_x86_64_additional_program_headers (bfd *abfd,
7142 struct bfd_link_info *info ATTRIBUTE_UNUSED)
7147 /* Check to see if we need a large readonly segment. */
7148 s = bfd_get_section_by_name (abfd, ".lrodata");
7149 if (s && (s->flags & SEC_LOAD))
7152 /* Check to see if we need a large data segment. Since .lbss sections
7153 is placed right after the .bss section, there should be no need for
7154 a large data segment just because of .lbss. */
7155 s = bfd_get_section_by_name (abfd, ".ldata");
7156 if (s && (s->flags & SEC_LOAD))
7162 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
7165 elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
7167 if (h->plt.offset != (bfd_vma) -1
7169 && !h->pointer_equality_needed)
7172 return _bfd_elf_hash_symbol (h);
7175 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
7178 elf_x86_64_relocs_compatible (const bfd_target *input,
7179 const bfd_target *output)
7181 return ((xvec_get_elf_backend_data (input)->s->elfclass
7182 == xvec_get_elf_backend_data (output)->s->elfclass)
7183 && _bfd_elf_relocs_compatible (input, output));
7186 /* Parse x86-64 GNU properties. */
7188 static enum elf_property_kind
7189 elf_x86_64_parse_gnu_properties (bfd *abfd, unsigned int type,
7190 bfd_byte *ptr, unsigned int datasz)
7196 case GNU_PROPERTY_X86_ISA_1_USED:
7197 case GNU_PROPERTY_X86_ISA_1_NEEDED:
7198 case GNU_PROPERTY_X86_FEATURE_1_AND:
7202 ((type == GNU_PROPERTY_X86_ISA_1_USED
7203 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
7204 : (type == GNU_PROPERTY_X86_ISA_1_NEEDED
7205 ? _("error: %B: <corrupt x86 ISA needed size: 0x%x>")
7206 : _("error: %B: <corrupt x86 feature size: 0x%x>"))),
7208 return property_corrupt;
7210 prop = _bfd_elf_get_property (abfd, type, datasz);
7211 /* Combine properties of the same type. */
7212 prop->u.number |= bfd_h_get_32 (abfd, ptr);
7213 prop->pr_kind = property_number;
7217 return property_ignored;
7220 return property_number;
7223 /* Merge x86-64 GNU property BPROP with APROP. If APROP isn't NULL,
7224 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
7225 should be merged with ABFD. */
7228 elf_x86_64_merge_gnu_properties (struct bfd_link_info *info,
7229 bfd *abfd ATTRIBUTE_UNUSED,
7230 elf_property *aprop,
7231 elf_property *bprop)
7233 unsigned int number, features;
7234 bfd_boolean updated = FALSE;
7235 unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type;
7239 case GNU_PROPERTY_X86_ISA_1_USED:
7240 case GNU_PROPERTY_X86_ISA_1_NEEDED:
7241 if (aprop != NULL && bprop != NULL)
7243 number = aprop->u.number;
7244 aprop->u.number = number | bprop->u.number;
7245 updated = number != (unsigned int) aprop->u.number;
7249 /* Return TRUE if APROP is NULL to indicate that BPROP should
7250 be added to ABFD. */
7251 updated = aprop == NULL;
7255 case GNU_PROPERTY_X86_FEATURE_1_AND:
7256 /* Only one of APROP and BPROP can be NULL:
7257 1. APROP & BPROP when both APROP and BPROP aren't NULL.
7258 2. If APROP is NULL, remove x86 feature.
7259 3. Otherwise, do nothing.
7261 if (aprop != NULL && bprop != NULL)
7265 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7267 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
7268 number = aprop->u.number;
7269 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
7270 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7271 aprop->u.number = (number & bprop->u.number) | features;
7272 updated = number != (unsigned int) aprop->u.number;
7273 /* Remove the property if all feature bits are cleared. */
7274 if (aprop->u.number == 0)
7275 aprop->pr_kind = property_remove;
7281 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7283 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
7286 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
7287 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7290 number = aprop->u.number;
7291 aprop->u.number = number | features;
7292 updated = number != (unsigned int) aprop->u.number;
7296 bprop->u.number |= features;
7300 else if (aprop != NULL)
7302 aprop->pr_kind = property_remove;
7309 /* Never should happen. */
7316 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
7317 with GNU properties if found. Otherwise, return NULL. */
7320 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info)
7322 bfd_boolean normal_target;
7323 bfd_boolean lazy_plt;
7324 asection *sec, *pltsec;
7326 bfd_boolean use_ibt_plt;
7327 unsigned int plt_alignment, features;
7328 struct elf_x86_64_link_hash_table *htab;
7335 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7337 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
7339 /* Find a normal input file with GNU property note. */
7340 for (pbfd = info->input_bfds;
7342 pbfd = pbfd->link.next)
7343 if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour
7344 && bfd_count_sections (pbfd) != 0)
7348 if (elf_properties (pbfd) != NULL)
7356 /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and
7357 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7358 prop = _bfd_elf_get_property (ebfd,
7359 GNU_PROPERTY_X86_FEATURE_1_AND,
7361 prop->u.number |= features;
7362 prop->pr_kind = property_number;
7364 /* Create the GNU property note section if needed. */
7367 sec = bfd_make_section_with_flags (ebfd,
7368 NOTE_GNU_PROPERTY_SECTION_NAME,
7376 info->callbacks->einfo (_("%F: failed to create GNU property section\n"));
7378 if (!bfd_set_section_alignment (ebfd, sec,
7379 ABI_64_P (ebfd) ? 3 : 2))
7382 info->callbacks->einfo (_("%F%A: failed to align section\n"),
7386 elf_section_type (sec) = SHT_NOTE;
7390 /* Check GNU_PROPERTY_NO_COPY_ON_PROTECTED. */
7391 for (; pbfd != NULL; pbfd = pbfd->link.next)
7392 if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour
7394 & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
7396 elf_property_list *p;
7398 /* The property list is sorted in order of type. */
7399 for (p = elf_properties (pbfd); p != NULL; p = p->next)
7401 if (GNU_PROPERTY_NO_COPY_ON_PROTECTED
7402 == p->property.pr_type)
7404 /* Clear extern_protected_data if
7405 GNU_PROPERTY_NO_COPY_ON_PROTECTED is
7406 set on any input relocatable file. */
7407 info->extern_protected_data = FALSE;
7410 else if (GNU_PROPERTY_NO_COPY_ON_PROTECTED
7411 < p->property.pr_type)
7417 pbfd = _bfd_elf_link_setup_gnu_properties (info);
7419 if (bfd_link_relocatable (info))
7422 htab = elf_x86_64_hash_table (info);
7426 use_ibt_plt = info->ibtplt || info->ibt;
7427 if (!use_ibt_plt && pbfd != NULL)
7429 /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */
7430 elf_property_list *p;
7432 /* The property list is sorted in order of type. */
7433 for (p = elf_properties (pbfd); p; p = p->next)
7435 if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type)
7437 use_ibt_plt = !!(p->property.u.number
7438 & GNU_PROPERTY_X86_FEATURE_1_IBT);
7441 else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type)
7446 dynobj = htab->elf.dynobj;
7448 /* Set htab->elf.dynobj here so that there is no need to check and
7449 set it in check_relocs. */
7454 htab->elf.dynobj = pbfd;
7461 /* Find a normal input file to hold linker created
7463 for (abfd = info->input_bfds;
7465 abfd = abfd->link.next)
7466 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
7468 & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
7470 htab->elf.dynobj = abfd;
7477 /* Even when lazy binding is disabled by "-z now", the PLT0 entry may
7478 still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
7479 canonical function address. */
7480 htab->plt.has_plt0 = 1;
7482 if (get_elf_x86_64_backend_data (info->output_bfd)->os
7487 if (ABI_64_P (dynobj))
7489 htab->lazy_plt = &elf_x86_64_lazy_ibt_plt;
7490 htab->non_lazy_plt = &elf_x86_64_non_lazy_ibt_plt;
7494 htab->lazy_plt = &elf_x32_lazy_ibt_plt;
7495 htab->non_lazy_plt = &elf_x32_non_lazy_ibt_plt;
7498 else if (info->bndplt)
7500 htab->lazy_plt = &elf_x86_64_lazy_bnd_plt;
7501 htab->non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt;
7505 htab->lazy_plt = &elf_x86_64_lazy_plt;
7506 htab->non_lazy_plt = &elf_x86_64_non_lazy_plt;
7508 normal_target = TRUE;
7512 htab->lazy_plt = &elf_x86_64_nacl_plt;
7513 htab->non_lazy_plt = NULL;
7514 normal_target = FALSE;
7517 pltsec = htab->elf.splt;
7519 /* If the non-lazy PLT is available, use it for all PLT entries if
7520 there are no PLT0 or no .plt section. */
7521 if (htab->non_lazy_plt != NULL
7522 && (!htab->plt.has_plt0 || pltsec == NULL))
7526 = htab->non_lazy_plt->plt_entry;
7527 htab->plt.plt_entry_size
7528 = htab->non_lazy_plt->plt_entry_size;
7529 htab->plt.plt_got_offset
7530 = htab->non_lazy_plt->plt_got_offset;
7531 htab->plt.plt_got_insn_size
7532 = htab->non_lazy_plt->plt_got_insn_size;
7533 htab->plt.eh_frame_plt_size
7534 = htab->non_lazy_plt->eh_frame_plt_size;
7535 htab->plt.eh_frame_plt
7536 = htab->non_lazy_plt->eh_frame_plt;
7542 = htab->lazy_plt->plt_entry;
7543 htab->plt.plt_entry_size
7544 = htab->lazy_plt->plt_entry_size;
7545 htab->plt.plt_got_offset
7546 = htab->lazy_plt->plt_got_offset;
7547 htab->plt.plt_got_insn_size
7548 = htab->lazy_plt->plt_got_insn_size;
7549 htab->plt.eh_frame_plt_size
7550 = htab->lazy_plt->eh_frame_plt_size;
7551 htab->plt.eh_frame_plt
7552 = htab->lazy_plt->eh_frame_plt;
7555 /* Return if there are no normal input files. */
7559 /* Since create_dynamic_sections isn't always called, but GOT
7560 relocations need GOT relocations, create them here so that we
7561 don't need to do it in check_relocs. */
7562 if (htab->elf.sgot == NULL
7563 && !_bfd_elf_create_got_section (dynobj, info))
7564 info->callbacks->einfo (_("%F: failed to create GOT sections\n"));
7566 /* Align .got and .got.plt sections to their entry size. Do it here
7567 instead of in create_dynamic_sections so that they are always
7568 properly aligned even if create_dynamic_sections isn't called. */
7569 sec = htab->elf.sgot;
7570 if (!bfd_set_section_alignment (dynobj, sec, 3))
7571 goto error_alignment;
7573 sec = htab->elf.sgotplt;
7574 if (!bfd_set_section_alignment (dynobj, sec, 3))
7575 goto error_alignment;
7577 /* Create the ifunc sections here so that check_relocs can be
7579 if (!_bfd_elf_create_ifunc_sections (dynobj, info))
7580 info->callbacks->einfo (_("%F: failed to create ifunc sections\n"));
7582 plt_alignment = bfd_log2 (htab->plt.plt_entry_size);
7586 /* Whe creating executable, set the contents of the .interp
7587 section to the interpreter. */
7588 if (bfd_link_executable (info) && !info->nointerp)
7590 asection *s = bfd_get_linker_section (dynobj, ".interp");
7593 s->size = htab->dynamic_interpreter_size;
7594 s->contents = (unsigned char *) htab->dynamic_interpreter;
7598 /* Don't change PLT section alignment for NaCl since it uses
7599 64-byte PLT entry and sets PLT section alignment to 32
7600 bytes. Don't create additional PLT sections for NaCl. */
7603 const struct elf_backend_data *bed
7604 = get_elf_backend_data (dynobj);
7605 flagword pltflags = (bed->dynamic_sec_flags
7610 unsigned int non_lazy_plt_alignment
7611 = bfd_log2 (htab->non_lazy_plt->plt_entry_size);
7614 if (!bfd_set_section_alignment (sec->owner, sec,
7616 goto error_alignment;
7618 /* Create the GOT procedure linkage table. */
7619 sec = bfd_make_section_anyway_with_flags (dynobj,
7623 info->callbacks->einfo (_("%F: failed to create GOT PLT section\n"));
7625 if (!bfd_set_section_alignment (dynobj, sec,
7626 non_lazy_plt_alignment))
7627 goto error_alignment;
7629 htab->plt_got = sec;
7637 /* Create the second PLT for Intel IBT support. IBT
7638 PLT is supported only for non-NaCl target and is
7639 is needed only for lazy binding. */
7640 sec = bfd_make_section_anyway_with_flags (dynobj,
7644 info->callbacks->einfo (_("%F: failed to create IBT-enabled PLT section\n"));
7646 if (!bfd_set_section_alignment (dynobj, sec,
7648 goto error_alignment;
7650 else if (info->bndplt && ABI_64_P (dynobj))
7652 /* Create the second PLT for Intel MPX support. MPX
7653 PLT is supported only for non-NaCl target in 64-bit
7654 mode and is needed only for lazy binding. */
7655 sec = bfd_make_section_anyway_with_flags (dynobj,
7659 info->callbacks->einfo (_("%F: failed to create BND PLT section\n"));
7661 if (!bfd_set_section_alignment (dynobj, sec,
7662 non_lazy_plt_alignment))
7663 goto error_alignment;
7666 htab->plt_second = sec;
7670 if (!info->no_ld_generated_unwind_info)
7672 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
7673 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
7674 | SEC_LINKER_CREATED);
7676 sec = bfd_make_section_anyway_with_flags (dynobj,
7680 info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n"));
7682 if (!bfd_set_section_alignment (dynobj, sec,
7683 ABI_64_P (dynobj) ? 3 : 2))
7684 goto error_alignment;
7686 htab->plt_eh_frame = sec;
7688 if (htab->plt_got != NULL)
7690 sec = bfd_make_section_anyway_with_flags (dynobj,
7694 info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n"));
7696 if (!bfd_set_section_alignment (dynobj, sec,
7697 ABI_64_P (dynobj) ? 3 : 2))
7698 goto error_alignment;
7700 htab->plt_got_eh_frame = sec;
7703 if (htab->plt_second != NULL)
7705 sec = bfd_make_section_anyway_with_flags (dynobj,
7709 info->callbacks->einfo (_("%F: failed to create BND PLT .eh_frame section\n"));
7711 if (!bfd_set_section_alignment (dynobj, sec, 3))
7712 goto error_alignment;
7714 htab->plt_second_eh_frame = sec;
7721 /* The .iplt section is used for IFUNC symbols in static
7723 sec = htab->elf.iplt;
7725 && !bfd_set_section_alignment (sec->owner, sec,
7727 goto error_alignment;
7734 elf_x86_64_link_check_relocs (bfd *abfd, struct bfd_link_info *info)
7736 if (!bfd_link_relocatable (info))
7738 /* Check for __tls_get_addr reference. */
7739 struct elf_link_hash_entry *h;
7740 h = elf_link_hash_lookup (elf_hash_table (info), "__tls_get_addr",
7741 FALSE, FALSE, FALSE);
7743 ((struct elf_x86_64_link_hash_entry *) h)->tls_get_addr = 1;
7746 /* Invoke the regular ELF backend linker to do all the work. */
7747 return _bfd_elf_link_check_relocs (abfd, info);
7750 static const struct bfd_elf_special_section
7751 elf_x86_64_special_sections[]=
7753 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7754 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
7755 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
7756 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7757 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7758 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
7759 { NULL, 0, 0, 0, 0 }
7762 #define TARGET_LITTLE_SYM x86_64_elf64_vec
7763 #define TARGET_LITTLE_NAME "elf64-x86-64"
7764 #define ELF_ARCH bfd_arch_i386
7765 #define ELF_TARGET_ID X86_64_ELF_DATA
7766 #define ELF_MACHINE_CODE EM_X86_64
7767 #define ELF_MAXPAGESIZE 0x200000
7768 #define ELF_MINPAGESIZE 0x1000
7769 #define ELF_COMMONPAGESIZE 0x1000
7771 #define elf_backend_can_gc_sections 1
7772 #define elf_backend_can_refcount 1
7773 #define elf_backend_want_got_plt 1
7774 #define elf_backend_plt_readonly 1
7775 #define elf_backend_want_plt_sym 0
7776 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
7777 #define elf_backend_rela_normal 1
7778 #define elf_backend_plt_alignment 4
7779 #define elf_backend_extern_protected_data 1
7780 #define elf_backend_caches_rawsize 1
7781 #define elf_backend_dtrel_excludes_plt 1
7782 #define elf_backend_want_dynrelro 1
7784 #define elf_info_to_howto elf_x86_64_info_to_howto
7786 #define bfd_elf64_bfd_link_hash_table_create \
7787 elf_x86_64_link_hash_table_create
7788 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
7789 #define bfd_elf64_bfd_reloc_name_lookup \
7790 elf_x86_64_reloc_name_lookup
7792 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
7793 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
7794 #define elf_backend_check_relocs elf_x86_64_check_relocs
7795 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
7796 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
7797 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
7798 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
7799 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
7800 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
7801 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
7802 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
7804 #define elf_backend_write_core_note elf_x86_64_write_core_note
7806 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
7807 #define elf_backend_relocate_section elf_x86_64_relocate_section
7808 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
7809 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
7810 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7811 #define elf_backend_object_p elf64_x86_64_elf_object_p
7812 #define bfd_elf64_mkobject elf_x86_64_mkobject
7813 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
7814 #define bfd_elf64_bfd_link_check_relocs elf_x86_64_link_check_relocs
7816 #define elf_backend_section_from_shdr \
7817 elf_x86_64_section_from_shdr
7819 #define elf_backend_section_from_bfd_section \
7820 elf_x86_64_elf_section_from_bfd_section
7821 #define elf_backend_add_symbol_hook \
7822 elf_x86_64_add_symbol_hook
7823 #define elf_backend_symbol_processing \
7824 elf_x86_64_symbol_processing
7825 #define elf_backend_common_section_index \
7826 elf_x86_64_common_section_index
7827 #define elf_backend_common_section \
7828 elf_x86_64_common_section
7829 #define elf_backend_common_definition \
7830 elf_x86_64_common_definition
7831 #define elf_backend_merge_symbol \
7832 elf_x86_64_merge_symbol
7833 #define elf_backend_special_sections \
7834 elf_x86_64_special_sections
7835 #define elf_backend_additional_program_headers \
7836 elf_x86_64_additional_program_headers
7837 #define elf_backend_hash_symbol \
7838 elf_x86_64_hash_symbol
7839 #define elf_backend_omit_section_dynsym \
7840 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
7841 #define elf_backend_fixup_symbol \
7842 elf_x86_64_fixup_symbol
7843 #define elf_backend_parse_gnu_properties \
7844 elf_x86_64_parse_gnu_properties
7845 #define elf_backend_merge_gnu_properties \
7846 elf_x86_64_merge_gnu_properties
7847 #define elf_backend_setup_gnu_properties \
7848 elf_x86_64_link_setup_gnu_properties
7850 #include "elf64-target.h"
7852 /* CloudABI support. */
7854 #undef TARGET_LITTLE_SYM
7855 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
7856 #undef TARGET_LITTLE_NAME
7857 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
7860 #define ELF_OSABI ELFOSABI_CLOUDABI
7863 #define elf64_bed elf64_x86_64_cloudabi_bed
7865 #include "elf64-target.h"
7867 /* FreeBSD support. */
7869 #undef TARGET_LITTLE_SYM
7870 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
7871 #undef TARGET_LITTLE_NAME
7872 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
7875 #define ELF_OSABI ELFOSABI_FREEBSD
7878 #define elf64_bed elf64_x86_64_fbsd_bed
7880 #include "elf64-target.h"
7882 /* Solaris 2 support. */
7884 #undef TARGET_LITTLE_SYM
7885 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
7886 #undef TARGET_LITTLE_NAME
7887 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
7889 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
7890 objects won't be recognized. */
7894 #define elf64_bed elf64_x86_64_sol2_bed
7896 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
7898 #undef elf_backend_static_tls_alignment
7899 #define elf_backend_static_tls_alignment 16
7901 /* The Solaris 2 ABI requires a plt symbol on all platforms.
7903 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
7905 #undef elf_backend_want_plt_sym
7906 #define elf_backend_want_plt_sym 1
7908 #undef elf_backend_strtab_flags
7909 #define elf_backend_strtab_flags SHF_STRINGS
7912 elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
7913 bfd *obfd ATTRIBUTE_UNUSED,
7914 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
7915 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
7917 /* PR 19938: FIXME: Need to add code for setting the sh_info
7918 and sh_link fields of Solaris specific section types. */
7922 #undef elf_backend_copy_special_section_fields
7923 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
7925 #include "elf64-target.h"
7927 /* Native Client support. */
7930 elf64_x86_64_nacl_elf_object_p (bfd *abfd)
7932 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
7933 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
7937 #undef TARGET_LITTLE_SYM
7938 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
7939 #undef TARGET_LITTLE_NAME
7940 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
7942 #define elf64_bed elf64_x86_64_nacl_bed
7944 #undef ELF_MAXPAGESIZE
7945 #undef ELF_MINPAGESIZE
7946 #undef ELF_COMMONPAGESIZE
7947 #define ELF_MAXPAGESIZE 0x10000
7948 #define ELF_MINPAGESIZE 0x10000
7949 #define ELF_COMMONPAGESIZE 0x10000
7951 /* Restore defaults. */
7953 #undef elf_backend_static_tls_alignment
7954 #undef elf_backend_want_plt_sym
7955 #define elf_backend_want_plt_sym 0
7956 #undef elf_backend_strtab_flags
7957 #undef elf_backend_copy_special_section_fields
7959 /* NaCl uses substantially different PLT entries for the same effects. */
7961 #undef elf_backend_plt_alignment
7962 #define elf_backend_plt_alignment 5
7963 #define NACL_PLT_ENTRY_SIZE 64
7964 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
7966 static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
7968 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
7969 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
7970 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
7971 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
7972 0x41, 0xff, 0xe3, /* jmpq *%r11 */
7974 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
7975 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
7977 /* 32 bytes of nop to pad out to the standard size. */
7978 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7979 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7980 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7981 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7982 0x66, /* excess data16 prefix */
7986 static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
7988 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
7989 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
7990 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
7991 0x41, 0xff, 0xe3, /* jmpq *%r11 */
7993 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
7994 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7995 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7997 /* Lazy GOT entries point here (32-byte aligned). */
7998 0x68, /* pushq immediate */
7999 0, 0, 0, 0, /* replaced with index into relocation table. */
8000 0xe9, /* jmp relative */
8001 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
8003 /* 22 bytes of nop to pad out to the standard size. */
8004 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
8005 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
8006 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
8009 /* .eh_frame covering the .plt section. */
8011 static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
8013 #if (PLT_CIE_LENGTH != 20 \
8014 || PLT_FDE_LENGTH != 36 \
8015 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
8016 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
8017 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
8019 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
8020 0, 0, 0, 0, /* CIE ID */
8021 1, /* CIE version */
8022 'z', 'R', 0, /* Augmentation string */
8023 1, /* Code alignment factor */
8024 0x78, /* Data alignment factor */
8025 16, /* Return address column */
8026 1, /* Augmentation size */
8027 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
8028 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
8029 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
8030 DW_CFA_nop, DW_CFA_nop,
8032 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
8033 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
8034 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
8035 0, 0, 0, 0, /* .plt size goes here */
8036 0, /* Augmentation size */
8037 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
8038 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
8039 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
8040 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
8041 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
8042 13, /* Block length */
8043 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
8044 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
8045 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
8046 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
8047 DW_CFA_nop, DW_CFA_nop
8050 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt =
8052 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
8053 elf_x86_64_nacl_plt_entry, /* plt_entry */
8054 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
8055 2, /* plt0_got1_offset */
8056 9, /* plt0_got2_offset */
8057 13, /* plt0_got2_insn_end */
8058 3, /* plt_got_offset */
8059 33, /* plt_reloc_offset */
8060 38, /* plt_plt_offset */
8061 7, /* plt_got_insn_size */
8062 42, /* plt_plt_insn_end */
8063 32, /* plt_lazy_offset */
8064 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
8065 sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */
8068 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
8073 #undef elf_backend_arch_data
8074 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
8076 #undef elf_backend_object_p
8077 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
8078 #undef elf_backend_modify_segment_map
8079 #define elf_backend_modify_segment_map nacl_modify_segment_map
8080 #undef elf_backend_modify_program_headers
8081 #define elf_backend_modify_program_headers nacl_modify_program_headers
8082 #undef elf_backend_final_write_processing
8083 #define elf_backend_final_write_processing nacl_final_write_processing
8085 #include "elf64-target.h"
8087 /* Native Client x32 support. */
8090 elf32_x86_64_nacl_elf_object_p (bfd *abfd)
8092 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
8093 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
8097 #undef TARGET_LITTLE_SYM
8098 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
8099 #undef TARGET_LITTLE_NAME
8100 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
8102 #define elf32_bed elf32_x86_64_nacl_bed
8104 #define bfd_elf32_bfd_link_hash_table_create \
8105 elf_x86_64_link_hash_table_create
8106 #define bfd_elf32_bfd_reloc_type_lookup \
8107 elf_x86_64_reloc_type_lookup
8108 #define bfd_elf32_bfd_reloc_name_lookup \
8109 elf_x86_64_reloc_name_lookup
8110 #define bfd_elf32_mkobject \
8112 #define bfd_elf32_get_synthetic_symtab \
8113 elf_x86_64_get_synthetic_symtab
8114 #define bfd_elf32_bfd_link_check_relocs \
8115 elf_x86_64_link_check_relocs
8117 #undef elf_backend_object_p
8118 #define elf_backend_object_p \
8119 elf32_x86_64_nacl_elf_object_p
8121 #undef elf_backend_bfd_from_remote_memory
8122 #define elf_backend_bfd_from_remote_memory \
8123 _bfd_elf32_bfd_from_remote_memory
8125 #undef elf_backend_size_info
8126 #define elf_backend_size_info \
8127 _bfd_elf32_size_info
8129 #include "elf32-target.h"
8131 /* Restore defaults. */
8132 #undef elf_backend_object_p
8133 #define elf_backend_object_p elf64_x86_64_elf_object_p
8134 #undef elf_backend_bfd_from_remote_memory
8135 #undef elf_backend_size_info
8136 #undef elf_backend_modify_segment_map
8137 #undef elf_backend_modify_program_headers
8138 #undef elf_backend_final_write_processing
8140 /* Intel L1OM support. */
8143 elf64_l1om_elf_object_p (bfd *abfd)
8145 /* Set the right machine number for an L1OM elf64 file. */
8146 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
8150 #undef TARGET_LITTLE_SYM
8151 #define TARGET_LITTLE_SYM l1om_elf64_vec
8152 #undef TARGET_LITTLE_NAME
8153 #define TARGET_LITTLE_NAME "elf64-l1om"
8155 #define ELF_ARCH bfd_arch_l1om
8157 #undef ELF_MACHINE_CODE
8158 #define ELF_MACHINE_CODE EM_L1OM
8163 #define elf64_bed elf64_l1om_bed
8165 #undef elf_backend_object_p
8166 #define elf_backend_object_p elf64_l1om_elf_object_p
8168 /* Restore defaults. */
8169 #undef ELF_MAXPAGESIZE
8170 #undef ELF_MINPAGESIZE
8171 #undef ELF_COMMONPAGESIZE
8172 #define ELF_MAXPAGESIZE 0x200000
8173 #define ELF_MINPAGESIZE 0x1000
8174 #define ELF_COMMONPAGESIZE 0x1000
8175 #undef elf_backend_plt_alignment
8176 #define elf_backend_plt_alignment 4
8177 #undef elf_backend_arch_data
8178 #define elf_backend_arch_data &elf_x86_64_arch_bed
8180 #include "elf64-target.h"
8182 /* FreeBSD L1OM support. */
8184 #undef TARGET_LITTLE_SYM
8185 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
8186 #undef TARGET_LITTLE_NAME
8187 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
8190 #define ELF_OSABI ELFOSABI_FREEBSD
8193 #define elf64_bed elf64_l1om_fbsd_bed
8195 #include "elf64-target.h"
8197 /* Intel K1OM support. */
8200 elf64_k1om_elf_object_p (bfd *abfd)
8202 /* Set the right machine number for an K1OM elf64 file. */
8203 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
8207 #undef TARGET_LITTLE_SYM
8208 #define TARGET_LITTLE_SYM k1om_elf64_vec
8209 #undef TARGET_LITTLE_NAME
8210 #define TARGET_LITTLE_NAME "elf64-k1om"
8212 #define ELF_ARCH bfd_arch_k1om
8214 #undef ELF_MACHINE_CODE
8215 #define ELF_MACHINE_CODE EM_K1OM
8220 #define elf64_bed elf64_k1om_bed
8222 #undef elf_backend_object_p
8223 #define elf_backend_object_p elf64_k1om_elf_object_p
8225 #undef elf_backend_static_tls_alignment
8227 #undef elf_backend_want_plt_sym
8228 #define elf_backend_want_plt_sym 0
8230 #include "elf64-target.h"
8232 /* FreeBSD K1OM support. */
8234 #undef TARGET_LITTLE_SYM
8235 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
8236 #undef TARGET_LITTLE_NAME
8237 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
8240 #define ELF_OSABI ELFOSABI_FREEBSD
8243 #define elf64_bed elf64_k1om_fbsd_bed
8245 #include "elf64-target.h"
8247 /* 32bit x86-64 support. */
8249 #undef TARGET_LITTLE_SYM
8250 #define TARGET_LITTLE_SYM x86_64_elf32_vec
8251 #undef TARGET_LITTLE_NAME
8252 #define TARGET_LITTLE_NAME "elf32-x86-64"
8256 #define ELF_ARCH bfd_arch_i386
8258 #undef ELF_MACHINE_CODE
8259 #define ELF_MACHINE_CODE EM_X86_64
8263 #undef elf_backend_object_p
8264 #define elf_backend_object_p \
8265 elf32_x86_64_elf_object_p
8267 #undef elf_backend_bfd_from_remote_memory
8268 #define elf_backend_bfd_from_remote_memory \
8269 _bfd_elf32_bfd_from_remote_memory
8271 #undef elf_backend_size_info
8272 #define elf_backend_size_info \
8273 _bfd_elf32_size_info
8275 #include "elf32-target.h"