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 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 (bfd *input_bfd, asection *sec,
1884 struct elf_link_hash_entry *h,
1885 Elf_Internal_Shdr *symtab_hdr,
1886 Elf_Internal_Sym *isym,
1887 reloc_howto_type *howto)
1890 const char *und = "";
1891 const char *pic = "";
1896 name = h->root.root.string;
1897 switch (ELF_ST_VISIBILITY (h->other))
1900 v = _("hidden symbol ");
1903 v = _("internal symbol ");
1906 v = _("protected symbol ");
1910 pic = _("; recompile with -fPIC");
1914 if (!h->def_regular && !h->def_dynamic)
1915 und = _("undefined ");
1919 name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL);
1920 pic = _("; recompile with -fPIC");
1923 /* xgettext:c-format */
1924 _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can "
1925 "not be used when making a shared object%s"),
1926 input_bfd, howto->name, und, v, name, pic);
1927 bfd_set_error (bfd_error_bad_value);
1928 sec->check_relocs_failed = 1;
1932 /* With the local symbol, foo, we convert
1933 mov foo@GOTPCREL(%rip), %reg
1937 call/jmp *foo@GOTPCREL(%rip)
1939 nop call foo/jmp foo nop
1940 When PIC is false, convert
1941 test %reg, foo@GOTPCREL(%rip)
1945 binop foo@GOTPCREL(%rip), %reg
1948 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1952 elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec,
1954 Elf_Internal_Rela *irel,
1955 struct elf_link_hash_entry *h,
1956 bfd_boolean *converted,
1957 struct bfd_link_info *link_info)
1959 struct elf_x86_64_link_hash_table *htab;
1961 bfd_boolean require_reloc_pc32;
1963 bfd_boolean to_reloc_pc32;
1966 bfd_signed_vma raddend;
1967 unsigned int opcode;
1969 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
1970 unsigned int r_symndx;
1972 bfd_vma roff = irel->r_offset;
1974 if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))
1977 raddend = irel->r_addend;
1978 /* Addend for 32-bit PC-relative relocation must be -4. */
1982 htab = elf_x86_64_hash_table (link_info);
1983 is_pic = bfd_link_pic (link_info);
1985 relocx = (r_type == R_X86_64_GOTPCRELX
1986 || r_type == R_X86_64_REX_GOTPCRELX);
1988 /* TRUE if we can convert only to R_X86_64_PC32. Enable it for
1991 = link_info->disable_target_specific_optimizations > 1;
1993 r_symndx = htab->r_sym (irel->r_info);
1995 opcode = bfd_get_8 (abfd, contents + roff - 2);
1997 /* Convert mov to lea since it has been done for a while. */
2000 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
2001 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
2002 test, xor instructions. */
2007 /* We convert only to R_X86_64_PC32:
2009 2. R_X86_64_GOTPCREL since we can't modify REX byte.
2010 3. require_reloc_pc32 is true.
2013 to_reloc_pc32 = (opcode == 0xff
2015 || require_reloc_pc32
2018 /* Get the symbol referred to by the reloc. */
2021 Elf_Internal_Sym *isym
2022 = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx);
2024 /* Skip relocation against undefined symbols. */
2025 if (isym->st_shndx == SHN_UNDEF)
2028 symtype = ELF_ST_TYPE (isym->st_info);
2030 if (isym->st_shndx == SHN_ABS)
2031 tsec = bfd_abs_section_ptr;
2032 else if (isym->st_shndx == SHN_COMMON)
2033 tsec = bfd_com_section_ptr;
2034 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
2035 tsec = &_bfd_elf_large_com_section;
2037 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2039 toff = isym->st_value;
2043 /* Undefined weak symbol is only bound locally in executable
2044 and its reference is resolved as 0 without relocation
2045 overflow. We can only perform this optimization for
2046 GOTPCRELX relocations since we need to modify REX byte.
2047 It is OK convert mov with R_X86_64_GOTPCREL to
2049 if ((relocx || opcode == 0x8b)
2050 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info,
2052 elf_x86_64_hash_entry (h)))
2056 /* Skip for branch instructions since R_X86_64_PC32
2058 if (require_reloc_pc32)
2063 /* For non-branch instructions, we can convert to
2064 R_X86_64_32/R_X86_64_32S since we know if there
2066 to_reloc_pc32 = FALSE;
2069 /* Since we don't know the current PC when PIC is true,
2070 we can't convert to R_X86_64_PC32. */
2071 if (to_reloc_pc32 && is_pic)
2076 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
2077 ld.so may use its link-time address. */
2078 else if (h->start_stop
2080 || h->root.type == bfd_link_hash_defined
2081 || h->root.type == bfd_link_hash_defweak)
2082 && h != htab->elf.hdynamic
2083 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
2085 /* bfd_link_hash_new or bfd_link_hash_undefined is
2086 set by an assignment in a linker script in
2087 bfd_elf_record_link_assignment. start_stop is set
2088 on __start_SECNAME/__stop_SECNAME which mark section
2092 && (h->root.type == bfd_link_hash_new
2093 || h->root.type == bfd_link_hash_undefined
2094 || ((h->root.type == bfd_link_hash_defined
2095 || h->root.type == bfd_link_hash_defweak)
2096 && h->root.u.def.section == bfd_und_section_ptr))))
2098 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
2099 if (require_reloc_pc32)
2103 tsec = h->root.u.def.section;
2104 toff = h->root.u.def.value;
2111 /* Don't convert GOTPCREL relocation against large section. */
2112 if (elf_section_data (tsec) != NULL
2113 && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0)
2116 /* We can only estimate relocation overflow for R_X86_64_PC32. */
2120 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
2122 /* At this stage in linking, no SEC_MERGE symbol has been
2123 adjusted, so all references to such symbols need to be
2124 passed through _bfd_merged_section_offset. (Later, in
2125 relocate_section, all SEC_MERGE symbols *except* for
2126 section symbols have been adjusted.)
2128 gas may reduce relocations against symbols in SEC_MERGE
2129 sections to a relocation against the section symbol when
2130 the original addend was zero. When the reloc is against
2131 a section symbol we should include the addend in the
2132 offset passed to _bfd_merged_section_offset, since the
2133 location of interest is the original symbol. On the
2134 other hand, an access to "sym+addend" where "sym" is not
2135 a section symbol should not include the addend; Such an
2136 access is presumed to be an offset from "sym"; The
2137 location of interest is just "sym". */
2138 if (symtype == STT_SECTION)
2141 toff = _bfd_merged_section_offset (abfd, &tsec,
2142 elf_section_data (tsec)->sec_info,
2145 if (symtype != STT_SECTION)
2151 /* Don't convert if R_X86_64_PC32 relocation overflows. */
2152 if (tsec->output_section == sec->output_section)
2154 if ((toff - roff + 0x80000000) > 0xffffffff)
2159 bfd_signed_vma distance;
2161 /* At this point, we don't know the load addresses of TSEC
2162 section nor SEC section. We estimate the distrance between
2163 SEC and TSEC. We store the estimated distances in the
2164 compressed_size field of the output section, which is only
2165 used to decompress the compressed input section. */
2166 if (sec->output_section->compressed_size == 0)
2169 bfd_size_type size = 0;
2170 for (asect = link_info->output_bfd->sections;
2172 asect = asect->next)
2173 /* Skip debug sections since compressed_size is used to
2174 compress debug sections. */
2175 if ((asect->flags & SEC_DEBUGGING) == 0)
2178 for (i = asect->map_head.s;
2182 size = align_power (size, i->alignment_power);
2185 asect->compressed_size = size;
2189 /* Don't convert GOTPCREL relocations if TSEC isn't placed
2191 distance = (tsec->output_section->compressed_size
2192 - sec->output_section->compressed_size);
2196 /* Take PT_GNU_RELRO segment into account by adding
2198 if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize
2199 - roff + 0x80000000) > 0xffffffff)
2206 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
2211 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
2213 modrm = bfd_get_8 (abfd, contents + roff - 1);
2216 /* Convert to "jmp foo nop". */
2219 nop_offset = irel->r_offset + 3;
2220 disp = bfd_get_32 (abfd, contents + irel->r_offset);
2221 irel->r_offset -= 1;
2222 bfd_put_32 (abfd, disp, contents + irel->r_offset);
2226 struct elf_x86_64_link_hash_entry *eh
2227 = (struct elf_x86_64_link_hash_entry *) h;
2229 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
2232 /* To support TLS optimization, always use addr32 prefix for
2233 "call *__tls_get_addr@GOTPCREL(%rip)". */
2234 if (eh && eh->tls_get_addr)
2237 nop_offset = irel->r_offset - 2;
2241 nop = link_info->call_nop_byte;
2242 if (link_info->call_nop_as_suffix)
2244 nop_offset = irel->r_offset + 3;
2245 disp = bfd_get_32 (abfd, contents + irel->r_offset);
2246 irel->r_offset -= 1;
2247 bfd_put_32 (abfd, disp, contents + irel->r_offset);
2250 nop_offset = irel->r_offset - 2;
2253 bfd_put_8 (abfd, nop, contents + nop_offset);
2254 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
2255 r_type = R_X86_64_PC32;
2260 unsigned int rex_mask = REX_R;
2262 if (r_type == R_X86_64_REX_GOTPCRELX)
2263 rex = bfd_get_8 (abfd, contents + roff - 3);
2271 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
2272 "lea foo(%rip), %reg". */
2274 r_type = R_X86_64_PC32;
2278 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
2279 "mov $foo, %reg". */
2281 modrm = bfd_get_8 (abfd, contents + roff - 1);
2282 modrm = 0xc0 | (modrm & 0x38) >> 3;
2283 if ((rex & REX_W) != 0
2284 && ABI_64_P (link_info->output_bfd))
2286 /* Keep the REX_W bit in REX byte for LP64. */
2287 r_type = R_X86_64_32S;
2288 goto rewrite_modrm_rex;
2292 /* If the REX_W bit in REX byte isn't needed,
2293 use R_X86_64_32 and clear the W bit to avoid
2294 sign-extend imm32 to imm64. */
2295 r_type = R_X86_64_32;
2296 /* Clear the W bit in REX byte. */
2298 goto rewrite_modrm_rex;
2304 /* R_X86_64_PC32 isn't supported. */
2308 modrm = bfd_get_8 (abfd, contents + roff - 1);
2311 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
2312 "test $foo, %reg". */
2313 modrm = 0xc0 | (modrm & 0x38) >> 3;
2318 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
2319 "binop $foo, %reg". */
2320 modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c);
2324 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
2325 overflow when sign-extending imm32 to imm64. */
2326 r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32;
2329 bfd_put_8 (abfd, modrm, contents + roff - 1);
2333 /* Move the R bit to the B bit in REX byte. */
2334 rex = (rex & ~rex_mask) | (rex & REX_R) >> 2;
2335 bfd_put_8 (abfd, rex, contents + roff - 3);
2338 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
2342 bfd_put_8 (abfd, opcode, contents + roff - 2);
2345 irel->r_info = htab->r_info (r_symndx, r_type);
2352 /* Look through the relocs for a section during the first phase, and
2353 calculate needed space in the global offset table, procedure
2354 linkage table, and dynamic reloc sections. */
2357 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
2359 const Elf_Internal_Rela *relocs)
2361 struct elf_x86_64_link_hash_table *htab;
2362 Elf_Internal_Shdr *symtab_hdr;
2363 struct elf_link_hash_entry **sym_hashes;
2364 const Elf_Internal_Rela *rel;
2365 const Elf_Internal_Rela *rel_end;
2369 if (bfd_link_relocatable (info))
2372 /* Don't do anything special with non-loaded, non-alloced sections.
2373 In particular, any relocs in such sections should not affect GOT
2374 and PLT reference counting (ie. we don't allow them to create GOT
2375 or PLT entries), there's no possibility or desire to optimize TLS
2376 relocs, and there's not much point in propagating relocs to shared
2377 libs that the dynamic linker won't relocate. */
2378 if ((sec->flags & SEC_ALLOC) == 0)
2381 BFD_ASSERT (is_x86_64_elf (abfd));
2383 htab = elf_x86_64_hash_table (info);
2386 sec->check_relocs_failed = 1;
2390 /* Get the section contents. */
2391 if (elf_section_data (sec)->this_hdr.contents != NULL)
2392 contents = elf_section_data (sec)->this_hdr.contents;
2393 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2395 sec->check_relocs_failed = 1;
2399 symtab_hdr = &elf_symtab_hdr (abfd);
2400 sym_hashes = elf_sym_hashes (abfd);
2404 rel_end = relocs + sec->reloc_count;
2405 for (rel = relocs; rel < rel_end; rel++)
2407 unsigned int r_type;
2408 unsigned int r_symndx;
2409 struct elf_link_hash_entry *h;
2410 struct elf_x86_64_link_hash_entry *eh;
2411 Elf_Internal_Sym *isym;
2413 bfd_boolean size_reloc;
2415 r_symndx = htab->r_sym (rel->r_info);
2416 r_type = ELF32_R_TYPE (rel->r_info);
2418 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
2420 /* xgettext:c-format */
2421 _bfd_error_handler (_("%B: bad symbol index: %d"),
2426 if (r_symndx < symtab_hdr->sh_info)
2428 /* A local symbol. */
2429 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2434 /* Check relocation against local STT_GNU_IFUNC symbol. */
2435 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2437 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
2442 /* Fake a STT_GNU_IFUNC symbol. */
2443 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
2445 h->type = STT_GNU_IFUNC;
2448 h->forced_local = 1;
2449 h->root.type = bfd_link_hash_defined;
2457 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2458 while (h->root.type == bfd_link_hash_indirect
2459 || h->root.type == bfd_link_hash_warning)
2460 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2463 /* Check invalid x32 relocations. */
2464 if (!ABI_64_P (abfd))
2470 case R_X86_64_DTPOFF64:
2471 case R_X86_64_TPOFF64:
2473 case R_X86_64_GOTOFF64:
2474 case R_X86_64_GOT64:
2475 case R_X86_64_GOTPCREL64:
2476 case R_X86_64_GOTPC64:
2477 case R_X86_64_GOTPLT64:
2478 case R_X86_64_PLTOFF64:
2481 name = h->root.root.string;
2483 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
2486 /* xgettext:c-format */
2487 (_("%B: relocation %s against symbol `%s' isn't "
2488 "supported in x32 mode"), abfd,
2489 x86_64_elf_howto_table[r_type].name, name);
2490 bfd_set_error (bfd_error_bad_value);
2498 /* It is referenced by a non-shared object. */
2500 h->root.non_ir_ref_regular = 1;
2502 if (h->type == STT_GNU_IFUNC)
2503 elf_tdata (info->output_bfd)->has_gnu_symbols
2504 |= elf_gnu_symbol_ifunc;
2507 if (! elf_x86_64_tls_transition (info, abfd, sec, contents,
2508 symtab_hdr, sym_hashes,
2509 &r_type, GOT_UNKNOWN,
2510 rel, rel_end, h, r_symndx, FALSE))
2513 eh = (struct elf_x86_64_link_hash_entry *) h;
2516 case R_X86_64_TLSLD:
2517 htab->tls_ld_got.refcount += 1;
2520 case R_X86_64_TPOFF32:
2521 if (!bfd_link_executable (info) && ABI_64_P (abfd))
2522 return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym,
2523 &x86_64_elf_howto_table[r_type]);
2525 eh->has_got_reloc = 1;
2528 case R_X86_64_GOTTPOFF:
2529 if (!bfd_link_executable (info))
2530 info->flags |= DF_STATIC_TLS;
2533 case R_X86_64_GOT32:
2534 case R_X86_64_GOTPCREL:
2535 case R_X86_64_GOTPCRELX:
2536 case R_X86_64_REX_GOTPCRELX:
2537 case R_X86_64_TLSGD:
2538 case R_X86_64_GOT64:
2539 case R_X86_64_GOTPCREL64:
2540 case R_X86_64_GOTPLT64:
2541 case R_X86_64_GOTPC32_TLSDESC:
2542 case R_X86_64_TLSDESC_CALL:
2543 /* This symbol requires a global offset table entry. */
2545 int tls_type, old_tls_type;
2549 default: tls_type = GOT_NORMAL; break;
2550 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
2551 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
2552 case R_X86_64_GOTPC32_TLSDESC:
2553 case R_X86_64_TLSDESC_CALL:
2554 tls_type = GOT_TLS_GDESC; break;
2559 h->got.refcount += 1;
2560 old_tls_type = eh->tls_type;
2564 bfd_signed_vma *local_got_refcounts;
2566 /* This is a global offset table entry for a local symbol. */
2567 local_got_refcounts = elf_local_got_refcounts (abfd);
2568 if (local_got_refcounts == NULL)
2572 size = symtab_hdr->sh_info;
2573 size *= sizeof (bfd_signed_vma)
2574 + sizeof (bfd_vma) + sizeof (char);
2575 local_got_refcounts = ((bfd_signed_vma *)
2576 bfd_zalloc (abfd, size));
2577 if (local_got_refcounts == NULL)
2579 elf_local_got_refcounts (abfd) = local_got_refcounts;
2580 elf_x86_64_local_tlsdesc_gotent (abfd)
2581 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2582 elf_x86_64_local_got_tls_type (abfd)
2583 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2585 local_got_refcounts[r_symndx] += 1;
2587 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
2590 /* If a TLS symbol is accessed using IE at least once,
2591 there is no point to use dynamic model for it. */
2592 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2593 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2594 || tls_type != GOT_TLS_IE))
2596 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
2597 tls_type = old_tls_type;
2598 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2599 && GOT_TLS_GD_ANY_P (tls_type))
2600 tls_type |= old_tls_type;
2604 name = h->root.root.string;
2606 name = bfd_elf_sym_name (abfd, symtab_hdr,
2609 /* xgettext:c-format */
2610 (_("%B: '%s' accessed both as normal and"
2611 " thread local symbol"),
2613 bfd_set_error (bfd_error_bad_value);
2618 if (old_tls_type != tls_type)
2621 eh->tls_type = tls_type;
2623 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
2628 case R_X86_64_GOTOFF64:
2629 case R_X86_64_GOTPC32:
2630 case R_X86_64_GOTPC64:
2633 eh->has_got_reloc = 1;
2636 case R_X86_64_PLT32:
2637 case R_X86_64_PLT32_BND:
2638 /* This symbol requires a procedure linkage table entry. We
2639 actually build the entry in adjust_dynamic_symbol,
2640 because this might be a case of linking PIC code which is
2641 never referenced by a dynamic object, in which case we
2642 don't need to generate a procedure linkage table entry
2645 /* If this is a local symbol, we resolve it directly without
2646 creating a procedure linkage table entry. */
2650 eh->has_got_reloc = 1;
2652 h->plt.refcount += 1;
2655 case R_X86_64_PLTOFF64:
2656 /* This tries to form the 'address' of a function relative
2657 to GOT. For global symbols we need a PLT entry. */
2661 h->plt.refcount += 1;
2665 case R_X86_64_SIZE32:
2666 case R_X86_64_SIZE64:
2671 if (!ABI_64_P (abfd))
2677 /* Check relocation overflow as these relocs may lead to
2678 run-time relocation overflow. Don't error out for
2679 sections we don't care about, such as debug sections or
2680 when relocation overflow check is disabled. */
2681 if (!info->no_reloc_overflow_check
2682 && (bfd_link_pic (info)
2683 || (bfd_link_executable (info)
2687 && (sec->flags & SEC_READONLY) == 0)))
2688 return elf_x86_64_need_pic (abfd, sec, h, symtab_hdr, isym,
2689 &x86_64_elf_howto_table[r_type]);
2695 case R_X86_64_PC32_BND:
2699 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2700 eh->has_non_got_reloc = 1;
2701 /* We are called after all symbols have been resolved. Only
2702 relocation against STT_GNU_IFUNC symbol must go through
2705 && (bfd_link_executable (info)
2706 || h->type == STT_GNU_IFUNC))
2708 /* If this reloc is in a read-only section, we might
2709 need a copy reloc. We can't check reliably at this
2710 stage whether the section is read-only, as input
2711 sections have not yet been mapped to output sections.
2712 Tentatively set the flag for now, and correct in
2713 adjust_dynamic_symbol. */
2716 /* We may need a .plt entry if the symbol is a function
2717 defined in a shared lib or is a STT_GNU_IFUNC function
2718 referenced from the code or read-only section. */
2720 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
2721 h->plt.refcount += 1;
2723 if (r_type == R_X86_64_PC32)
2725 /* Since something like ".long foo - ." may be used
2726 as pointer, make sure that PLT is used if foo is
2727 a function defined in a shared library. */
2728 if ((sec->flags & SEC_CODE) == 0)
2729 h->pointer_equality_needed = 1;
2731 else if (r_type != R_X86_64_PC32_BND
2732 && r_type != R_X86_64_PC64)
2734 h->pointer_equality_needed = 1;
2735 /* At run-time, R_X86_64_64 can be resolved for both
2736 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2737 can only be resolved for x32. */
2738 if ((sec->flags & SEC_READONLY) == 0
2739 && (r_type == R_X86_64_64
2740 || (!ABI_64_P (abfd)
2741 && (r_type == R_X86_64_32
2742 || r_type == R_X86_64_32S))))
2743 eh->func_pointer_refcount += 1;
2749 /* If we are creating a shared library, and this is a reloc
2750 against a global symbol, or a non PC relative reloc
2751 against a local symbol, then we need to copy the reloc
2752 into the shared library. However, if we are linking with
2753 -Bsymbolic, we do not need to copy a reloc against a
2754 global symbol which is defined in an object we are
2755 including in the link (i.e., DEF_REGULAR is set). At
2756 this point we have not seen all the input files, so it is
2757 possible that DEF_REGULAR is not set now but will be set
2758 later (it is never cleared). In case of a weak definition,
2759 DEF_REGULAR may be cleared later by a strong definition in
2760 a shared library. We account for that possibility below by
2761 storing information in the relocs_copied field of the hash
2762 table entry. A similar situation occurs when creating
2763 shared libraries and symbol visibility changes render the
2766 If on the other hand, we are creating an executable, we
2767 may need to keep relocations for symbols satisfied by a
2768 dynamic library if we manage to avoid copy relocs for the
2771 Generate dynamic pointer relocation against STT_GNU_IFUNC
2772 symbol in the non-code section. */
2773 if ((bfd_link_pic (info)
2774 && (! IS_X86_64_PCREL_TYPE (r_type)
2776 && (! (bfd_link_pie (info)
2777 || SYMBOLIC_BIND (info, h))
2778 || h->root.type == bfd_link_hash_defweak
2779 || !h->def_regular))))
2781 && h->type == STT_GNU_IFUNC
2782 && r_type == htab->pointer_r_type
2783 && (sec->flags & SEC_CODE) == 0)
2784 || (ELIMINATE_COPY_RELOCS
2785 && !bfd_link_pic (info)
2787 && (h->root.type == bfd_link_hash_defweak
2788 || !h->def_regular)))
2790 struct elf_dyn_relocs *p;
2791 struct elf_dyn_relocs **head;
2793 /* We must copy these reloc types into the output file.
2794 Create a reloc section in dynobj and make room for
2798 sreloc = _bfd_elf_make_dynamic_reloc_section
2799 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
2800 abfd, /*rela?*/ TRUE);
2806 /* If this is a global symbol, we count the number of
2807 relocations we need for this symbol. */
2809 head = &eh->dyn_relocs;
2812 /* Track dynamic relocs needed for local syms too.
2813 We really need local syms available to do this
2818 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2823 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2827 /* Beware of type punned pointers vs strict aliasing
2829 vpp = &(elf_section_data (s)->local_dynrel);
2830 head = (struct elf_dyn_relocs **)vpp;
2834 if (p == NULL || p->sec != sec)
2836 bfd_size_type amt = sizeof *p;
2838 p = ((struct elf_dyn_relocs *)
2839 bfd_alloc (htab->elf.dynobj, amt));
2850 /* Count size relocation as PC-relative relocation. */
2851 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
2856 /* This relocation describes the C++ object vtable hierarchy.
2857 Reconstruct it for later use during GC. */
2858 case R_X86_64_GNU_VTINHERIT:
2859 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2863 /* This relocation describes which C++ vtable entries are actually
2864 used. Record for later use during GC. */
2865 case R_X86_64_GNU_VTENTRY:
2866 BFD_ASSERT (h != NULL);
2868 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2876 if ((r_type == R_X86_64_GOTPCREL
2877 || r_type == R_X86_64_GOTPCRELX
2878 || r_type == R_X86_64_REX_GOTPCRELX)
2879 && (h == NULL || h->type != STT_GNU_IFUNC))
2880 sec->need_convert_load = 1;
2883 if (elf_section_data (sec)->this_hdr.contents != contents)
2885 if (!info->keep_memory)
2889 /* Cache the section contents for elf_link_input_bfd. */
2890 elf_section_data (sec)->this_hdr.contents = contents;
2897 if (elf_section_data (sec)->this_hdr.contents != contents)
2899 sec->check_relocs_failed = 1;
2903 /* Return the section that should be marked against GC for a given
2907 elf_x86_64_gc_mark_hook (asection *sec,
2908 struct bfd_link_info *info,
2909 Elf_Internal_Rela *rel,
2910 struct elf_link_hash_entry *h,
2911 Elf_Internal_Sym *sym)
2914 switch (ELF32_R_TYPE (rel->r_info))
2916 case R_X86_64_GNU_VTINHERIT:
2917 case R_X86_64_GNU_VTENTRY:
2921 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2924 /* Remove undefined weak symbol from the dynamic symbol table if it
2925 is resolved to 0. */
2928 elf_x86_64_fixup_symbol (struct bfd_link_info *info,
2929 struct elf_link_hash_entry *h)
2931 if (h->dynindx != -1
2932 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2933 elf_x86_64_hash_entry (h)->has_got_reloc,
2934 elf_x86_64_hash_entry (h)))
2937 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2943 /* Adjust a symbol defined by a dynamic object and referenced by a
2944 regular object. The current definition is in some section of the
2945 dynamic object, but we're not including those sections. We have to
2946 change the definition to something the rest of the link can
2950 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2951 struct elf_link_hash_entry *h)
2953 struct elf_x86_64_link_hash_table *htab;
2955 struct elf_x86_64_link_hash_entry *eh;
2956 struct elf_dyn_relocs *p;
2958 /* STT_GNU_IFUNC symbol must go through PLT. */
2959 if (h->type == STT_GNU_IFUNC)
2961 /* All local STT_GNU_IFUNC references must be treate as local
2962 calls via local PLT. */
2964 && SYMBOL_CALLS_LOCAL (info, h))
2966 bfd_size_type pc_count = 0, count = 0;
2967 struct elf_dyn_relocs **pp;
2969 eh = (struct elf_x86_64_link_hash_entry *) h;
2970 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2972 pc_count += p->pc_count;
2973 p->count -= p->pc_count;
2982 if (pc_count || count)
2987 /* Increment PLT reference count only for PC-relative
2990 if (h->plt.refcount <= 0)
2991 h->plt.refcount = 1;
2993 h->plt.refcount += 1;
2998 if (h->plt.refcount <= 0)
3000 h->plt.offset = (bfd_vma) -1;
3006 /* If this is a function, put it in the procedure linkage table. We
3007 will fill in the contents of the procedure linkage table later,
3008 when we know the address of the .got section. */
3009 if (h->type == STT_FUNC
3012 if (h->plt.refcount <= 0
3013 || SYMBOL_CALLS_LOCAL (info, h)
3014 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3015 && h->root.type == bfd_link_hash_undefweak))
3017 /* This case can occur if we saw a PLT32 reloc in an input
3018 file, but the symbol was never referred to by a dynamic
3019 object, or if all references were garbage collected. In
3020 such a case, we don't actually need to build a procedure
3021 linkage table, and we can just do a PC32 reloc instead. */
3022 h->plt.offset = (bfd_vma) -1;
3029 /* It's possible that we incorrectly decided a .plt reloc was
3030 needed for an R_X86_64_PC32 reloc to a non-function sym in
3031 check_relocs. We can't decide accurately between function and
3032 non-function syms in check-relocs; Objects loaded later in
3033 the link may change h->type. So fix it now. */
3034 h->plt.offset = (bfd_vma) -1;
3036 /* If this is a weak symbol, and there is a real definition, the
3037 processor independent code will have arranged for us to see the
3038 real definition first, and we can just use the same value. */
3039 if (h->u.weakdef != NULL)
3041 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3042 || h->u.weakdef->root.type == bfd_link_hash_defweak);
3043 h->root.u.def.section = h->u.weakdef->root.u.def.section;
3044 h->root.u.def.value = h->u.weakdef->root.u.def.value;
3045 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
3047 eh = (struct elf_x86_64_link_hash_entry *) h;
3048 h->non_got_ref = h->u.weakdef->non_got_ref;
3049 eh->needs_copy = h->u.weakdef->needs_copy;
3054 /* This is a reference to a symbol defined by a dynamic object which
3055 is not a function. */
3057 /* If we are creating a shared library, we must presume that the
3058 only references to the symbol are via the global offset table.
3059 For such cases we need not do anything here; the relocations will
3060 be handled correctly by relocate_section. */
3061 if (!bfd_link_executable (info))
3064 /* If there are no references to this symbol that do not use the
3065 GOT, we don't need to generate a copy reloc. */
3066 if (!h->non_got_ref)
3069 /* If -z nocopyreloc was given, we won't generate them either. */
3070 if (info->nocopyreloc)
3076 if (ELIMINATE_COPY_RELOCS)
3078 eh = (struct elf_x86_64_link_hash_entry *) h;
3079 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3081 s = p->sec->output_section;
3082 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3086 /* If we didn't find any dynamic relocs in read-only sections, then
3087 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
3095 /* We must allocate the symbol in our .dynbss section, which will
3096 become part of the .bss section of the executable. There will be
3097 an entry for this symbol in the .dynsym section. The dynamic
3098 object will contain position independent code, so all references
3099 from the dynamic object to this symbol will go through the global
3100 offset table. The dynamic linker will use the .dynsym entry to
3101 determine the address it must put in the global offset table, so
3102 both the dynamic object and the regular object will refer to the
3103 same memory location for the variable. */
3105 htab = elf_x86_64_hash_table (info);
3109 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
3110 to copy the initial value out of the dynamic object and into the
3111 runtime process image. */
3112 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
3114 s = htab->elf.sdynrelro;
3115 srel = htab->elf.sreldynrelro;
3119 s = htab->elf.sdynbss;
3120 srel = htab->elf.srelbss;
3122 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3124 const struct elf_backend_data *bed;
3125 bed = get_elf_backend_data (info->output_bfd);
3126 srel->size += bed->s->sizeof_rela;
3130 return _bfd_elf_adjust_dynamic_copy (info, h, s);
3133 /* Allocate space in .plt, .got and associated reloc sections for
3137 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
3139 struct bfd_link_info *info;
3140 struct elf_x86_64_link_hash_table *htab;
3141 struct elf_x86_64_link_hash_entry *eh;
3142 struct elf_dyn_relocs *p;
3143 const struct elf_backend_data *bed;
3144 unsigned int plt_entry_size;
3145 bfd_boolean resolved_to_zero;
3147 if (h->root.type == bfd_link_hash_indirect)
3150 eh = (struct elf_x86_64_link_hash_entry *) h;
3152 info = (struct bfd_link_info *) inf;
3153 htab = elf_x86_64_hash_table (info);
3156 bed = get_elf_backend_data (info->output_bfd);
3157 plt_entry_size = htab->plt.plt_entry_size;
3159 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
3163 /* We can't use the GOT PLT if pointer equality is needed since
3164 finish_dynamic_symbol won't clear symbol value and the dynamic
3165 linker won't update the GOT slot. We will get into an infinite
3166 loop at run-time. */
3167 if (htab->plt_got != NULL
3168 && h->type != STT_GNU_IFUNC
3169 && !h->pointer_equality_needed
3170 && h->plt.refcount > 0
3171 && h->got.refcount > 0)
3173 /* Don't use the regular PLT if there are both GOT and GOTPLT
3175 h->plt.offset = (bfd_vma) -1;
3177 /* Use the GOT PLT. */
3178 eh->plt_got.refcount = 1;
3181 /* Clear the reference count of function pointer relocations if
3182 symbol isn't a normal function. */
3183 if (h->type != STT_FUNC)
3184 eh->func_pointer_refcount = 0;
3186 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
3187 here if it is defined and referenced in a non-shared object. */
3188 if (h->type == STT_GNU_IFUNC
3191 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
3193 &htab->readonly_dynrelocs_against_ifunc,
3197 GOT_ENTRY_SIZE, TRUE))
3199 asection *s = htab->plt_second;
3200 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
3202 /* Use the second PLT section if it is created. */
3203 eh->plt_second.offset = s->size;
3205 /* Make room for this entry in the second PLT section. */
3206 s->size += htab->non_lazy_plt->plt_entry_size;
3214 /* Don't create the PLT entry if there are only function pointer
3215 relocations which can be resolved at run-time. */
3216 else if (htab->elf.dynamic_sections_created
3217 && (h->plt.refcount > eh->func_pointer_refcount
3218 || eh->plt_got.refcount > 0))
3220 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
3222 /* Clear the reference count of function pointer relocations
3224 eh->func_pointer_refcount = 0;
3226 /* Make sure this symbol is output as a dynamic symbol.
3227 Undefined weak syms won't yet be marked as dynamic. */
3228 if (h->dynindx == -1
3230 && !resolved_to_zero
3231 && h->root.type == bfd_link_hash_undefweak)
3233 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3237 if (bfd_link_pic (info)
3238 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
3240 asection *s = htab->elf.splt;
3241 asection *second_s = htab->plt_second;
3242 asection *got_s = htab->plt_got;
3244 /* If this is the first .plt entry, make room for the special
3245 first entry. The .plt section is used by prelink to undo
3246 prelinking for dynamic relocations. */
3248 s->size = htab->plt.has_plt0 * plt_entry_size;
3251 eh->plt_got.offset = got_s->size;
3254 h->plt.offset = s->size;
3256 eh->plt_second.offset = second_s->size;
3259 /* If this symbol is not defined in a regular file, and we are
3260 not generating a shared library, then set the symbol to this
3261 location in the .plt. This is required to make function
3262 pointers compare as equal between the normal executable and
3263 the shared library. */
3264 if (! bfd_link_pic (info)
3269 /* We need to make a call to the entry of the GOT PLT
3270 instead of regular PLT entry. */
3271 h->root.u.def.section = got_s;
3272 h->root.u.def.value = eh->plt_got.offset;
3278 /* We need to make a call to the entry of the
3279 second PLT instead of regular PLT entry. */
3280 h->root.u.def.section = second_s;
3281 h->root.u.def.value = eh->plt_second.offset;
3285 h->root.u.def.section = s;
3286 h->root.u.def.value = h->plt.offset;
3291 /* Make room for this entry. */
3293 got_s->size += htab->non_lazy_plt->plt_entry_size;
3296 s->size += plt_entry_size;
3298 second_s->size += htab->non_lazy_plt->plt_entry_size;
3300 /* We also need to make an entry in the .got.plt section,
3301 which will be placed in the .got section by the linker
3303 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
3305 /* There should be no PLT relocation against resolved
3306 undefined weak symbol in executable. */
3307 if (!resolved_to_zero)
3309 /* We also need to make an entry in the .rela.plt
3311 htab->elf.srelplt->size += bed->s->sizeof_rela;
3312 htab->elf.srelplt->reloc_count++;
3318 eh->plt_got.offset = (bfd_vma) -1;
3319 h->plt.offset = (bfd_vma) -1;
3325 eh->plt_got.offset = (bfd_vma) -1;
3326 h->plt.offset = (bfd_vma) -1;
3330 eh->tlsdesc_got = (bfd_vma) -1;
3332 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
3333 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
3334 if (h->got.refcount > 0
3335 && bfd_link_executable (info)
3337 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
3339 h->got.offset = (bfd_vma) -1;
3341 else if (h->got.refcount > 0)
3345 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
3347 /* Make sure this symbol is output as a dynamic symbol.
3348 Undefined weak syms won't yet be marked as dynamic. */
3349 if (h->dynindx == -1
3351 && !resolved_to_zero
3352 && h->root.type == bfd_link_hash_undefweak)
3354 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3358 if (GOT_TLS_GDESC_P (tls_type))
3360 eh->tlsdesc_got = htab->elf.sgotplt->size
3361 - elf_x86_64_compute_jump_table_size (htab);
3362 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3363 h->got.offset = (bfd_vma) -2;
3365 if (! GOT_TLS_GDESC_P (tls_type)
3366 || GOT_TLS_GD_P (tls_type))
3369 h->got.offset = s->size;
3370 s->size += GOT_ENTRY_SIZE;
3371 if (GOT_TLS_GD_P (tls_type))
3372 s->size += GOT_ENTRY_SIZE;
3374 dyn = htab->elf.dynamic_sections_created;
3375 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
3376 and two if global. R_X86_64_GOTTPOFF needs one dynamic
3377 relocation. No dynamic relocation against resolved undefined
3378 weak symbol in executable. */
3379 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
3380 || tls_type == GOT_TLS_IE)
3381 htab->elf.srelgot->size += bed->s->sizeof_rela;
3382 else if (GOT_TLS_GD_P (tls_type))
3383 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
3384 else if (! GOT_TLS_GDESC_P (tls_type)
3385 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3386 && !resolved_to_zero)
3387 || h->root.type != bfd_link_hash_undefweak)
3388 && (bfd_link_pic (info)
3389 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
3390 htab->elf.srelgot->size += bed->s->sizeof_rela;
3391 if (GOT_TLS_GDESC_P (tls_type))
3393 htab->elf.srelplt->size += bed->s->sizeof_rela;
3394 htab->tlsdesc_plt = (bfd_vma) -1;
3398 h->got.offset = (bfd_vma) -1;
3400 if (eh->dyn_relocs == NULL)
3403 /* In the shared -Bsymbolic case, discard space allocated for
3404 dynamic pc-relative relocs against symbols which turn out to be
3405 defined in regular objects. For the normal shared case, discard
3406 space for pc-relative relocs that have become local due to symbol
3407 visibility changes. */
3409 if (bfd_link_pic (info))
3411 /* Relocs that use pc_count are those that appear on a call
3412 insn, or certain REL relocs that can generated via assembly.
3413 We want calls to protected symbols to resolve directly to the
3414 function rather than going via the plt. If people want
3415 function pointer comparisons to work as expected then they
3416 should avoid writing weird assembly. */
3417 if (SYMBOL_CALLS_LOCAL (info, h))
3419 struct elf_dyn_relocs **pp;
3421 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3423 p->count -= p->pc_count;
3432 /* Also discard relocs on undefined weak syms with non-default
3433 visibility or in PIE. */
3434 if (eh->dyn_relocs != NULL)
3436 if (h->root.type == bfd_link_hash_undefweak)
3438 /* Undefined weak symbol is never bound locally in shared
3440 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3441 || resolved_to_zero)
3442 eh->dyn_relocs = NULL;
3443 else if (h->dynindx == -1
3444 && ! h->forced_local
3445 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3448 /* For PIE, discard space for pc-relative relocs against
3449 symbols which turn out to need copy relocs. */
3450 else if (bfd_link_executable (info)
3451 && (h->needs_copy || eh->needs_copy)
3455 struct elf_dyn_relocs **pp;
3457 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3459 if (p->pc_count != 0)
3467 else if (ELIMINATE_COPY_RELOCS)
3469 /* For the non-shared case, discard space for relocs against
3470 symbols which turn out to need copy relocs or are not
3471 dynamic. Keep dynamic relocations for run-time function
3472 pointer initialization. */
3474 if ((!h->non_got_ref
3475 || eh->func_pointer_refcount > 0
3476 || (h->root.type == bfd_link_hash_undefweak
3477 && !resolved_to_zero))
3480 || (htab->elf.dynamic_sections_created
3481 && (h->root.type == bfd_link_hash_undefweak
3482 || h->root.type == bfd_link_hash_undefined))))
3484 /* Make sure this symbol is output as a dynamic symbol.
3485 Undefined weak syms won't yet be marked as dynamic. */
3486 if (h->dynindx == -1
3487 && ! h->forced_local
3488 && ! resolved_to_zero
3489 && h->root.type == bfd_link_hash_undefweak
3490 && ! bfd_elf_link_record_dynamic_symbol (info, h))
3493 /* If that succeeded, we know we'll be keeping all the
3495 if (h->dynindx != -1)
3499 eh->dyn_relocs = NULL;
3500 eh->func_pointer_refcount = 0;
3505 /* Finally, allocate space. */
3506 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3510 sreloc = elf_section_data (p->sec)->sreloc;
3512 BFD_ASSERT (sreloc != NULL);
3514 sreloc->size += p->count * bed->s->sizeof_rela;
3520 /* Allocate space in .plt, .got and associated reloc sections for
3521 local dynamic relocs. */
3524 elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
3526 struct elf_link_hash_entry *h
3527 = (struct elf_link_hash_entry *) *slot;
3529 if (h->type != STT_GNU_IFUNC
3533 || h->root.type != bfd_link_hash_defined)
3536 return elf_x86_64_allocate_dynrelocs (h, inf);
3539 /* Find any dynamic relocs that apply to read-only sections. */
3542 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
3545 struct elf_x86_64_link_hash_entry *eh;
3546 struct elf_dyn_relocs *p;
3548 /* Skip local IFUNC symbols. */
3549 if (h->forced_local && h->type == STT_GNU_IFUNC)
3552 eh = (struct elf_x86_64_link_hash_entry *) h;
3553 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3555 asection *s = p->sec->output_section;
3557 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3559 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3561 info->flags |= DF_TEXTREL;
3563 if ((info->warn_shared_textrel && bfd_link_pic (info))
3564 || info->error_textrel)
3565 /* xgettext:c-format */
3566 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3567 p->sec->owner, h->root.root.string,
3570 /* Not an error, just cut short the traversal. */
3577 /* Convert load via the GOT slot to load immediate. */
3580 elf_x86_64_convert_load (bfd *abfd, asection *sec,
3581 struct bfd_link_info *link_info)
3583 Elf_Internal_Shdr *symtab_hdr;
3584 Elf_Internal_Rela *internal_relocs;
3585 Elf_Internal_Rela *irel, *irelend;
3587 struct elf_x86_64_link_hash_table *htab;
3588 bfd_boolean changed;
3589 bfd_signed_vma *local_got_refcounts;
3591 /* Don't even try to convert non-ELF outputs. */
3592 if (!is_elf_hash_table (link_info->hash))
3595 /* Nothing to do if there is no need or no output. */
3596 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
3597 || sec->need_convert_load == 0
3598 || bfd_is_abs_section (sec->output_section))
3601 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3603 /* Load the relocations for this section. */
3604 internal_relocs = (_bfd_elf_link_read_relocs
3605 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3606 link_info->keep_memory));
3607 if (internal_relocs == NULL)
3611 htab = elf_x86_64_hash_table (link_info);
3612 local_got_refcounts = elf_local_got_refcounts (abfd);
3614 /* Get the section contents. */
3615 if (elf_section_data (sec)->this_hdr.contents != NULL)
3616 contents = elf_section_data (sec)->this_hdr.contents;
3619 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3623 irelend = internal_relocs + sec->reloc_count;
3624 for (irel = internal_relocs; irel < irelend; irel++)
3626 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3627 unsigned int r_symndx;
3628 struct elf_link_hash_entry *h;
3629 bfd_boolean converted;
3631 if (r_type != R_X86_64_GOTPCRELX
3632 && r_type != R_X86_64_REX_GOTPCRELX
3633 && r_type != R_X86_64_GOTPCREL)
3636 r_symndx = htab->r_sym (irel->r_info);
3637 if (r_symndx < symtab_hdr->sh_info)
3638 h = elf_x86_64_get_local_sym_hash (htab, sec->owner,
3639 (const Elf_Internal_Rela *) irel,
3643 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
3644 while (h->root.type == bfd_link_hash_indirect
3645 || h->root.type == bfd_link_hash_warning)
3646 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3649 /* STT_GNU_IFUNC must keep GOTPCREL relocations. */
3650 if (h != NULL && h->type == STT_GNU_IFUNC)
3654 if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h,
3655 &converted, link_info))
3660 changed = converted;
3663 if (h->got.refcount > 0)
3664 h->got.refcount -= 1;
3668 if (local_got_refcounts != NULL
3669 && local_got_refcounts[r_symndx] > 0)
3670 local_got_refcounts[r_symndx] -= 1;
3675 if (contents != NULL
3676 && elf_section_data (sec)->this_hdr.contents != contents)
3678 if (!changed && !link_info->keep_memory)
3682 /* Cache the section contents for elf_link_input_bfd. */
3683 elf_section_data (sec)->this_hdr.contents = contents;
3687 if (elf_section_data (sec)->relocs != internal_relocs)
3690 free (internal_relocs);
3692 elf_section_data (sec)->relocs = internal_relocs;
3698 if (contents != NULL
3699 && elf_section_data (sec)->this_hdr.contents != contents)
3701 if (internal_relocs != NULL
3702 && elf_section_data (sec)->relocs != internal_relocs)
3703 free (internal_relocs);
3707 /* Set the sizes of the dynamic sections. */
3710 elf_x86_64_size_dynamic_sections (bfd *output_bfd,
3711 struct bfd_link_info *info)
3713 struct elf_x86_64_link_hash_table *htab;
3718 const struct elf_backend_data *bed;
3720 htab = elf_x86_64_hash_table (info);
3723 bed = get_elf_backend_data (output_bfd);
3725 dynobj = htab->elf.dynobj;
3729 /* Set up .got offsets for local syms, and space for local dynamic
3731 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3733 bfd_signed_vma *local_got;
3734 bfd_signed_vma *end_local_got;
3735 char *local_tls_type;
3736 bfd_vma *local_tlsdesc_gotent;
3737 bfd_size_type locsymcount;
3738 Elf_Internal_Shdr *symtab_hdr;
3741 if (! is_x86_64_elf (ibfd))
3744 for (s = ibfd->sections; s != NULL; s = s->next)
3746 struct elf_dyn_relocs *p;
3748 if (!elf_x86_64_convert_load (ibfd, s, info))
3751 for (p = (struct elf_dyn_relocs *)
3752 (elf_section_data (s)->local_dynrel);
3756 if (!bfd_is_abs_section (p->sec)
3757 && bfd_is_abs_section (p->sec->output_section))
3759 /* Input section has been discarded, either because
3760 it is a copy of a linkonce section or due to
3761 linker script /DISCARD/, so we'll be discarding
3764 else if (p->count != 0)
3766 srel = elf_section_data (p->sec)->sreloc;
3767 srel->size += p->count * bed->s->sizeof_rela;
3768 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3769 && (info->flags & DF_TEXTREL) == 0)
3771 info->flags |= DF_TEXTREL;
3772 if ((info->warn_shared_textrel && bfd_link_pic (info))
3773 || info->error_textrel)
3774 /* xgettext:c-format */
3775 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3776 p->sec->owner, p->sec);
3782 local_got = elf_local_got_refcounts (ibfd);
3786 symtab_hdr = &elf_symtab_hdr (ibfd);
3787 locsymcount = symtab_hdr->sh_info;
3788 end_local_got = local_got + locsymcount;
3789 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
3790 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
3792 srel = htab->elf.srelgot;
3793 for (; local_got < end_local_got;
3794 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3796 *local_tlsdesc_gotent = (bfd_vma) -1;
3799 if (GOT_TLS_GDESC_P (*local_tls_type))
3801 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3802 - elf_x86_64_compute_jump_table_size (htab);
3803 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3804 *local_got = (bfd_vma) -2;
3806 if (! GOT_TLS_GDESC_P (*local_tls_type)
3807 || GOT_TLS_GD_P (*local_tls_type))
3809 *local_got = s->size;
3810 s->size += GOT_ENTRY_SIZE;
3811 if (GOT_TLS_GD_P (*local_tls_type))
3812 s->size += GOT_ENTRY_SIZE;
3814 if (bfd_link_pic (info)
3815 || GOT_TLS_GD_ANY_P (*local_tls_type)
3816 || *local_tls_type == GOT_TLS_IE)
3818 if (GOT_TLS_GDESC_P (*local_tls_type))
3820 htab->elf.srelplt->size
3821 += bed->s->sizeof_rela;
3822 htab->tlsdesc_plt = (bfd_vma) -1;
3824 if (! GOT_TLS_GDESC_P (*local_tls_type)
3825 || GOT_TLS_GD_P (*local_tls_type))
3826 srel->size += bed->s->sizeof_rela;
3830 *local_got = (bfd_vma) -1;
3834 if (htab->tls_ld_got.refcount > 0)
3836 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3838 htab->tls_ld_got.offset = htab->elf.sgot->size;
3839 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
3840 htab->elf.srelgot->size += bed->s->sizeof_rela;
3843 htab->tls_ld_got.offset = -1;
3845 /* Allocate global sym .plt and .got entries, and space for global
3846 sym dynamic relocs. */
3847 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
3850 /* Allocate .plt and .got entries, and space for local symbols. */
3851 htab_traverse (htab->loc_hash_table,
3852 elf_x86_64_allocate_local_dynrelocs,
3855 /* For every jump slot reserved in the sgotplt, reloc_count is
3856 incremented. However, when we reserve space for TLS descriptors,
3857 it's not incremented, so in order to compute the space reserved
3858 for them, it suffices to multiply the reloc count by the jump
3861 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3862 so that R_X86_64_IRELATIVE entries come last. */
3863 if (htab->elf.srelplt)
3865 htab->sgotplt_jump_table_size
3866 = elf_x86_64_compute_jump_table_size (htab);
3867 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3869 else if (htab->elf.irelplt)
3870 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3872 if (htab->tlsdesc_plt)
3874 /* If we're not using lazy TLS relocations, don't generate the
3875 PLT and GOT entries they require. */
3876 if ((info->flags & DF_BIND_NOW))
3877 htab->tlsdesc_plt = 0;
3880 htab->tlsdesc_got = htab->elf.sgot->size;
3881 htab->elf.sgot->size += GOT_ENTRY_SIZE;
3882 /* Reserve room for the initial entry.
3883 FIXME: we could probably do away with it in this case. */
3884 if (htab->elf.splt->size == 0)
3885 htab->elf.splt->size = htab->plt.plt_entry_size;
3886 htab->tlsdesc_plt = htab->elf.splt->size;
3887 htab->elf.splt->size += htab->plt.plt_entry_size;
3891 if (htab->elf.sgotplt)
3893 /* Don't allocate .got.plt section if there are no GOT nor PLT
3894 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3895 if ((htab->elf.hgot == NULL
3896 || !htab->elf.hgot->ref_regular_nonweak)
3897 && (htab->elf.sgotplt->size
3898 == get_elf_backend_data (output_bfd)->got_header_size)
3899 && (htab->elf.splt == NULL
3900 || htab->elf.splt->size == 0)
3901 && (htab->elf.sgot == NULL
3902 || htab->elf.sgot->size == 0)
3903 && (htab->elf.iplt == NULL
3904 || htab->elf.iplt->size == 0)
3905 && (htab->elf.igotplt == NULL
3906 || htab->elf.igotplt->size == 0))
3907 htab->elf.sgotplt->size = 0;
3910 if (_bfd_elf_eh_frame_present (info))
3912 if (htab->plt_eh_frame != NULL
3913 && htab->elf.splt != NULL
3914 && htab->elf.splt->size != 0
3915 && !bfd_is_abs_section (htab->elf.splt->output_section))
3916 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
3918 if (htab->plt_got_eh_frame != NULL
3919 && htab->plt_got != NULL
3920 && htab->plt_got->size != 0
3921 && !bfd_is_abs_section (htab->plt_got->output_section))
3922 htab->plt_got_eh_frame->size
3923 = htab->non_lazy_plt->eh_frame_plt_size;
3925 /* Unwind info for the second PLT and .plt.got sections are
3927 if (htab->plt_second_eh_frame != NULL
3928 && htab->plt_second != NULL
3929 && htab->plt_second->size != 0
3930 && !bfd_is_abs_section (htab->plt_second->output_section))
3931 htab->plt_second_eh_frame->size
3932 = htab->non_lazy_plt->eh_frame_plt_size;
3935 /* We now have determined the sizes of the various dynamic sections.
3936 Allocate memory for them. */
3938 for (s = dynobj->sections; s != NULL; s = s->next)
3940 if ((s->flags & SEC_LINKER_CREATED) == 0)
3943 if (s == htab->elf.splt
3944 || s == htab->elf.sgot
3945 || s == htab->elf.sgotplt
3946 || s == htab->elf.iplt
3947 || s == htab->elf.igotplt
3948 || s == htab->plt_second
3949 || s == htab->plt_got
3950 || s == htab->plt_eh_frame
3951 || s == htab->plt_got_eh_frame
3952 || s == htab->plt_second_eh_frame
3953 || s == htab->elf.sdynbss
3954 || s == htab->elf.sdynrelro)
3956 /* Strip this section if we don't need it; see the
3959 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
3961 if (s->size != 0 && s != htab->elf.srelplt)
3964 /* We use the reloc_count field as a counter if we need
3965 to copy relocs into the output file. */
3966 if (s != htab->elf.srelplt)
3971 /* It's not one of our sections, so don't allocate space. */
3977 /* If we don't need this section, strip it from the
3978 output file. This is mostly to handle .rela.bss and
3979 .rela.plt. We must create both sections in
3980 create_dynamic_sections, because they must be created
3981 before the linker maps input sections to output
3982 sections. The linker does that before
3983 adjust_dynamic_symbol is called, and it is that
3984 function which decides whether anything needs to go
3985 into these sections. */
3987 s->flags |= SEC_EXCLUDE;
3991 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3994 /* Allocate memory for the section contents. We use bfd_zalloc
3995 here in case unused entries are not reclaimed before the
3996 section's contents are written out. This should not happen,
3997 but this way if it does, we get a R_X86_64_NONE reloc instead
3999 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
4000 if (s->contents == NULL)
4004 if (htab->plt_eh_frame != NULL
4005 && htab->plt_eh_frame->contents != NULL)
4007 memcpy (htab->plt_eh_frame->contents,
4008 htab->plt.eh_frame_plt, htab->plt_eh_frame->size);
4009 bfd_put_32 (dynobj, htab->elf.splt->size,
4010 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
4013 if (htab->plt_got_eh_frame != NULL
4014 && htab->plt_got_eh_frame->contents != NULL)
4016 memcpy (htab->plt_got_eh_frame->contents,
4017 htab->non_lazy_plt->eh_frame_plt,
4018 htab->plt_got_eh_frame->size);
4019 bfd_put_32 (dynobj, htab->plt_got->size,
4020 (htab->plt_got_eh_frame->contents
4021 + PLT_FDE_LEN_OFFSET));
4024 if (htab->plt_second_eh_frame != NULL
4025 && htab->plt_second_eh_frame->contents != NULL)
4027 memcpy (htab->plt_second_eh_frame->contents,
4028 htab->non_lazy_plt->eh_frame_plt,
4029 htab->plt_second_eh_frame->size);
4030 bfd_put_32 (dynobj, htab->plt_second->size,
4031 (htab->plt_second_eh_frame->contents
4032 + PLT_FDE_LEN_OFFSET));
4035 if (htab->elf.dynamic_sections_created)
4037 /* Add some entries to the .dynamic section. We fill in the
4038 values later, in elf_x86_64_finish_dynamic_sections, but we
4039 must add the entries now so that we get the correct size for
4040 the .dynamic section. The DT_DEBUG entry is filled in by the
4041 dynamic linker and used by the debugger. */
4042 #define add_dynamic_entry(TAG, VAL) \
4043 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4045 if (bfd_link_executable (info))
4047 if (!add_dynamic_entry (DT_DEBUG, 0))
4051 if (htab->elf.splt->size != 0)
4053 /* DT_PLTGOT is used by prelink even if there is no PLT
4055 if (!add_dynamic_entry (DT_PLTGOT, 0))
4059 if (htab->elf.srelplt->size != 0)
4061 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
4062 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4063 || !add_dynamic_entry (DT_JMPREL, 0))
4067 if (htab->tlsdesc_plt
4068 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
4069 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
4074 if (!add_dynamic_entry (DT_RELA, 0)
4075 || !add_dynamic_entry (DT_RELASZ, 0)
4076 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
4079 /* If any dynamic relocs apply to a read-only section,
4080 then we need a DT_TEXTREL entry. */
4081 if ((info->flags & DF_TEXTREL) == 0)
4082 elf_link_hash_traverse (&htab->elf,
4083 elf_x86_64_readonly_dynrelocs,
4086 if ((info->flags & DF_TEXTREL) != 0)
4088 if (htab->readonly_dynrelocs_against_ifunc)
4090 info->callbacks->einfo
4091 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
4092 bfd_set_error (bfd_error_bad_value);
4096 if (!add_dynamic_entry (DT_TEXTREL, 0))
4101 #undef add_dynamic_entry
4107 elf_x86_64_always_size_sections (bfd *output_bfd,
4108 struct bfd_link_info *info)
4110 asection *tls_sec = elf_hash_table (info)->tls_sec;
4114 struct elf_link_hash_entry *tlsbase;
4116 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
4117 "_TLS_MODULE_BASE_",
4118 FALSE, FALSE, FALSE);
4120 if (tlsbase && tlsbase->type == STT_TLS)
4122 struct elf_x86_64_link_hash_table *htab;
4123 struct bfd_link_hash_entry *bh = NULL;
4124 const struct elf_backend_data *bed
4125 = get_elf_backend_data (output_bfd);
4127 htab = elf_x86_64_hash_table (info);
4131 if (!(_bfd_generic_link_add_one_symbol
4132 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
4133 tls_sec, 0, NULL, FALSE,
4134 bed->collect, &bh)))
4137 htab->tls_module_base = bh;
4139 tlsbase = (struct elf_link_hash_entry *)bh;
4140 tlsbase->def_regular = 1;
4141 tlsbase->other = STV_HIDDEN;
4142 tlsbase->root.linker_def = 1;
4143 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
4150 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
4151 executables. Rather than setting it to the beginning of the TLS
4152 section, we have to set it to the end. This function may be called
4153 multiple times, it is idempotent. */
4156 elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
4158 struct elf_x86_64_link_hash_table *htab;
4159 struct bfd_link_hash_entry *base;
4161 if (!bfd_link_executable (info))
4164 htab = elf_x86_64_hash_table (info);
4168 base = htab->tls_module_base;
4172 base->u.def.value = htab->elf.tls_size;
4175 /* Return the base VMA address which should be subtracted from real addresses
4176 when resolving @dtpoff relocation.
4177 This is PT_TLS segment p_vaddr. */
4180 elf_x86_64_dtpoff_base (struct bfd_link_info *info)
4182 /* If tls_sec is NULL, we should have signalled an error already. */
4183 if (elf_hash_table (info)->tls_sec == NULL)
4185 return elf_hash_table (info)->tls_sec->vma;
4188 /* Return the relocation value for @tpoff relocation
4189 if STT_TLS virtual address is ADDRESS. */
4192 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
4194 struct elf_link_hash_table *htab = elf_hash_table (info);
4195 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
4196 bfd_vma static_tls_size;
4198 /* If tls_segment is NULL, we should have signalled an error already. */
4199 if (htab->tls_sec == NULL)
4202 /* Consider special static TLS alignment requirements. */
4203 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
4204 return address - static_tls_size - htab->tls_sec->vma;
4207 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
4211 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
4213 /* Opcode Instruction
4216 0x0f 0x8x conditional jump */
4218 && (contents [offset - 1] == 0xe8
4219 || contents [offset - 1] == 0xe9))
4221 && contents [offset - 2] == 0x0f
4222 && (contents [offset - 1] & 0xf0) == 0x80));
4225 /* Relocate an x86_64 ELF section. */
4228 elf_x86_64_relocate_section (bfd *output_bfd,
4229 struct bfd_link_info *info,
4231 asection *input_section,
4233 Elf_Internal_Rela *relocs,
4234 Elf_Internal_Sym *local_syms,
4235 asection **local_sections)
4237 struct elf_x86_64_link_hash_table *htab;
4238 Elf_Internal_Shdr *symtab_hdr;
4239 struct elf_link_hash_entry **sym_hashes;
4240 bfd_vma *local_got_offsets;
4241 bfd_vma *local_tlsdesc_gotents;
4242 Elf_Internal_Rela *rel;
4243 Elf_Internal_Rela *wrel;
4244 Elf_Internal_Rela *relend;
4245 unsigned int plt_entry_size;
4247 BFD_ASSERT (is_x86_64_elf (input_bfd));
4249 /* Skip if check_relocs failed. */
4250 if (input_section->check_relocs_failed)
4253 htab = elf_x86_64_hash_table (info);
4256 plt_entry_size = htab->plt.plt_entry_size;
4257 symtab_hdr = &elf_symtab_hdr (input_bfd);
4258 sym_hashes = elf_sym_hashes (input_bfd);
4259 local_got_offsets = elf_local_got_offsets (input_bfd);
4260 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
4262 elf_x86_64_set_tls_module_base (info);
4264 rel = wrel = relocs;
4265 relend = relocs + input_section->reloc_count;
4266 for (; rel < relend; wrel++, rel++)
4268 unsigned int r_type;
4269 reloc_howto_type *howto;
4270 unsigned long r_symndx;
4271 struct elf_link_hash_entry *h;
4272 struct elf_x86_64_link_hash_entry *eh;
4273 Elf_Internal_Sym *sym;
4275 bfd_vma off, offplt, plt_offset;
4277 bfd_boolean unresolved_reloc;
4278 bfd_reloc_status_type r;
4280 asection *base_got, *resolved_plt;
4282 bfd_boolean resolved_to_zero;
4283 bfd_boolean relative_reloc;
4285 r_type = ELF32_R_TYPE (rel->r_info);
4286 if (r_type == (int) R_X86_64_GNU_VTINHERIT
4287 || r_type == (int) R_X86_64_GNU_VTENTRY)
4294 if (r_type >= (int) R_X86_64_standard)
4295 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
4297 if (r_type != (int) R_X86_64_32
4298 || ABI_64_P (output_bfd))
4299 howto = x86_64_elf_howto_table + r_type;
4301 howto = (x86_64_elf_howto_table
4302 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
4303 r_symndx = htab->r_sym (rel->r_info);
4307 unresolved_reloc = FALSE;
4308 if (r_symndx < symtab_hdr->sh_info)
4310 sym = local_syms + r_symndx;
4311 sec = local_sections[r_symndx];
4313 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
4315 st_size = sym->st_size;
4317 /* Relocate against local STT_GNU_IFUNC symbol. */
4318 if (!bfd_link_relocatable (info)
4319 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4321 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
4326 /* Set STT_GNU_IFUNC symbol value. */
4327 h->root.u.def.value = sym->st_value;
4328 h->root.u.def.section = sec;
4333 bfd_boolean warned ATTRIBUTE_UNUSED;
4334 bfd_boolean ignored ATTRIBUTE_UNUSED;
4336 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4337 r_symndx, symtab_hdr, sym_hashes,
4339 unresolved_reloc, warned, ignored);
4343 if (sec != NULL && discarded_section (sec))
4345 _bfd_clear_contents (howto, input_bfd, input_section,
4346 contents + rel->r_offset);
4347 wrel->r_offset = rel->r_offset;
4351 /* For ld -r, remove relocations in debug sections against
4352 sections defined in discarded sections. Not done for
4353 eh_frame editing code expects to be present. */
4354 if (bfd_link_relocatable (info)
4355 && (input_section->flags & SEC_DEBUGGING))
4361 if (bfd_link_relocatable (info))
4368 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
4370 if (r_type == R_X86_64_64)
4372 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
4373 zero-extend it to 64bit if addend is zero. */
4374 r_type = R_X86_64_32;
4375 memset (contents + rel->r_offset + 4, 0, 4);
4377 else if (r_type == R_X86_64_SIZE64)
4379 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
4380 zero-extend it to 64bit if addend is zero. */
4381 r_type = R_X86_64_SIZE32;
4382 memset (contents + rel->r_offset + 4, 0, 4);
4386 eh = (struct elf_x86_64_link_hash_entry *) h;
4388 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4389 it here if it is defined in a non-shared object. */
4391 && h->type == STT_GNU_IFUNC
4397 if ((input_section->flags & SEC_ALLOC) == 0)
4399 /* Dynamic relocs are not propagated for SEC_DEBUGGING
4400 sections because such sections are not SEC_ALLOC and
4401 thus ld.so will not process them. */
4402 if ((input_section->flags & SEC_DEBUGGING) != 0)
4412 case R_X86_64_GOTPCREL:
4413 case R_X86_64_GOTPCRELX:
4414 case R_X86_64_REX_GOTPCRELX:
4415 case R_X86_64_GOTPCREL64:
4416 base_got = htab->elf.sgot;
4417 off = h->got.offset;
4419 if (base_got == NULL)
4422 if (off == (bfd_vma) -1)
4424 /* We can't use h->got.offset here to save state, or
4425 even just remember the offset, as finish_dynamic_symbol
4426 would use that as offset into .got. */
4428 if (h->plt.offset == (bfd_vma) -1)
4431 if (htab->elf.splt != NULL)
4433 plt_index = (h->plt.offset / plt_entry_size
4434 - htab->plt.has_plt0);
4435 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4436 base_got = htab->elf.sgotplt;
4440 plt_index = h->plt.offset / plt_entry_size;
4441 off = plt_index * GOT_ENTRY_SIZE;
4442 base_got = htab->elf.igotplt;
4445 if (h->dynindx == -1
4449 /* This references the local defitionion. We must
4450 initialize this entry in the global offset table.
4451 Since the offset must always be a multiple of 8,
4452 we use the least significant bit to record
4453 whether we have initialized it already.
4455 When doing a dynamic link, we create a .rela.got
4456 relocation entry to initialize the value. This
4457 is done in the finish_dynamic_symbol routine. */
4462 bfd_put_64 (output_bfd, relocation,
4463 base_got->contents + off);
4464 /* Note that this is harmless for the GOTPLT64
4465 case, as -1 | 1 still is -1. */
4471 relocation = (base_got->output_section->vma
4472 + base_got->output_offset + off);
4477 if (h->plt.offset == (bfd_vma) -1)
4479 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4480 if (r_type == htab->pointer_r_type
4481 && (input_section->flags & SEC_CODE) == 0)
4482 goto do_ifunc_pointer;
4483 goto bad_ifunc_reloc;
4486 /* STT_GNU_IFUNC symbol must go through PLT. */
4487 if (htab->elf.splt != NULL)
4489 if (htab->plt_second != NULL)
4491 resolved_plt = htab->plt_second;
4492 plt_offset = eh->plt_second.offset;
4496 resolved_plt = htab->elf.splt;
4497 plt_offset = h->plt.offset;
4502 resolved_plt = htab->elf.iplt;
4503 plt_offset = h->plt.offset;
4506 relocation = (resolved_plt->output_section->vma
4507 + resolved_plt->output_offset + plt_offset);
4513 if (h->root.root.string)
4514 name = h->root.root.string;
4516 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4519 /* xgettext:c-format */
4520 (_("%B: relocation %s against STT_GNU_IFUNC "
4521 "symbol `%s' isn't supported"), input_bfd,
4523 bfd_set_error (bfd_error_bad_value);
4527 if (bfd_link_pic (info))
4532 if (ABI_64_P (output_bfd))
4537 if (rel->r_addend != 0)
4539 if (h->root.root.string)
4540 name = h->root.root.string;
4542 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4545 /* xgettext:c-format */
4546 (_("%B: relocation %s against STT_GNU_IFUNC "
4547 "symbol `%s' has non-zero addend: %Ld"),
4548 input_bfd, howto->name, name, rel->r_addend);
4549 bfd_set_error (bfd_error_bad_value);
4553 /* Generate dynamic relcoation only when there is a
4554 non-GOT reference in a shared object or there is no
4556 if ((bfd_link_pic (info) && h->non_got_ref)
4557 || h->plt.offset == (bfd_vma) -1)
4559 Elf_Internal_Rela outrel;
4562 /* Need a dynamic relocation to get the real function
4564 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4568 if (outrel.r_offset == (bfd_vma) -1
4569 || outrel.r_offset == (bfd_vma) -2)
4572 outrel.r_offset += (input_section->output_section->vma
4573 + input_section->output_offset);
4575 if (h->dynindx == -1
4577 || bfd_link_executable (info))
4579 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4580 h->root.root.string,
4581 h->root.u.def.section->owner);
4583 /* This symbol is resolved locally. */
4584 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4585 outrel.r_addend = (h->root.u.def.value
4586 + h->root.u.def.section->output_section->vma
4587 + h->root.u.def.section->output_offset);
4591 outrel.r_info = htab->r_info (h->dynindx, r_type);
4592 outrel.r_addend = 0;
4595 /* Dynamic relocations are stored in
4596 1. .rela.ifunc section in PIC object.
4597 2. .rela.got section in dynamic executable.
4598 3. .rela.iplt section in static executable. */
4599 if (bfd_link_pic (info))
4600 sreloc = htab->elf.irelifunc;
4601 else if (htab->elf.splt != NULL)
4602 sreloc = htab->elf.srelgot;
4604 sreloc = htab->elf.irelplt;
4605 elf_append_rela (output_bfd, sreloc, &outrel);
4607 /* If this reloc is against an external symbol, we
4608 do not want to fiddle with the addend. Otherwise,
4609 we need to include the symbol value so that it
4610 becomes an addend for the dynamic reloc. For an
4611 internal symbol, we have updated addend. */
4616 case R_X86_64_PC32_BND:
4618 case R_X86_64_PLT32:
4619 case R_X86_64_PLT32_BND:
4624 resolved_to_zero = (eh != NULL
4625 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4629 /* When generating a shared object, the relocations handled here are
4630 copied into the output file to be resolved at run time. */
4633 case R_X86_64_GOT32:
4634 case R_X86_64_GOT64:
4635 /* Relocation is to the entry for this symbol in the global
4637 case R_X86_64_GOTPCREL:
4638 case R_X86_64_GOTPCRELX:
4639 case R_X86_64_REX_GOTPCRELX:
4640 case R_X86_64_GOTPCREL64:
4641 /* Use global offset table entry as symbol value. */
4642 case R_X86_64_GOTPLT64:
4643 /* This is obsolete and treated the same as GOT64. */
4644 base_got = htab->elf.sgot;
4646 if (htab->elf.sgot == NULL)
4649 relative_reloc = FALSE;
4654 off = h->got.offset;
4656 && h->plt.offset != (bfd_vma)-1
4657 && off == (bfd_vma)-1)
4659 /* We can't use h->got.offset here to save
4660 state, or even just remember the offset, as
4661 finish_dynamic_symbol would use that as offset into
4663 bfd_vma plt_index = (h->plt.offset / plt_entry_size
4664 - htab->plt.has_plt0);
4665 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4666 base_got = htab->elf.sgotplt;
4669 dyn = htab->elf.dynamic_sections_created;
4671 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
4672 || (bfd_link_pic (info)
4673 && SYMBOL_REFERENCES_LOCAL (info, h))
4674 || (ELF_ST_VISIBILITY (h->other)
4675 && h->root.type == bfd_link_hash_undefweak))
4677 /* This is actually a static link, or it is a -Bsymbolic
4678 link and the symbol is defined locally, or the symbol
4679 was forced to be local because of a version file. We
4680 must initialize this entry in the global offset table.
4681 Since the offset must always be a multiple of 8, we
4682 use the least significant bit to record whether we
4683 have initialized it already.
4685 When doing a dynamic link, we create a .rela.got
4686 relocation entry to initialize the value. This is
4687 done in the finish_dynamic_symbol routine. */
4692 bfd_put_64 (output_bfd, relocation,
4693 base_got->contents + off);
4694 /* Note that this is harmless for the GOTPLT64 case,
4695 as -1 | 1 still is -1. */
4698 if (h->dynindx == -1
4700 && h->root.type != bfd_link_hash_undefweak
4701 && bfd_link_pic (info))
4703 /* If this symbol isn't dynamic in PIC,
4704 generate R_X86_64_RELATIVE here. */
4705 eh->no_finish_dynamic_symbol = 1;
4706 relative_reloc = TRUE;
4711 unresolved_reloc = FALSE;
4715 if (local_got_offsets == NULL)
4718 off = local_got_offsets[r_symndx];
4720 /* The offset must always be a multiple of 8. We use
4721 the least significant bit to record whether we have
4722 already generated the necessary reloc. */
4727 bfd_put_64 (output_bfd, relocation,
4728 base_got->contents + off);
4729 local_got_offsets[r_symndx] |= 1;
4731 if (bfd_link_pic (info))
4732 relative_reloc = TRUE;
4739 Elf_Internal_Rela outrel;
4741 /* We need to generate a R_X86_64_RELATIVE reloc
4742 for the dynamic linker. */
4743 s = htab->elf.srelgot;
4747 outrel.r_offset = (base_got->output_section->vma
4748 + base_got->output_offset
4750 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4751 outrel.r_addend = relocation;
4752 elf_append_rela (output_bfd, s, &outrel);
4755 if (off >= (bfd_vma) -2)
4758 relocation = base_got->output_section->vma
4759 + base_got->output_offset + off;
4760 if (r_type != R_X86_64_GOTPCREL
4761 && r_type != R_X86_64_GOTPCRELX
4762 && r_type != R_X86_64_REX_GOTPCRELX
4763 && r_type != R_X86_64_GOTPCREL64)
4764 relocation -= htab->elf.sgotplt->output_section->vma
4765 - htab->elf.sgotplt->output_offset;
4769 case R_X86_64_GOTOFF64:
4770 /* Relocation is relative to the start of the global offset
4773 /* Check to make sure it isn't a protected function or data
4774 symbol for shared library since it may not be local when
4775 used as function address or with copy relocation. We also
4776 need to make sure that a symbol is referenced locally. */
4777 if (bfd_link_pic (info) && h)
4779 if (!h->def_regular)
4783 switch (ELF_ST_VISIBILITY (h->other))
4786 v = _("hidden symbol");
4789 v = _("internal symbol");
4792 v = _("protected symbol");
4800 /* xgettext:c-format */
4801 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s"
4802 " `%s' can not be used when making a shared object"),
4803 input_bfd, v, h->root.root.string);
4804 bfd_set_error (bfd_error_bad_value);
4807 else if (!bfd_link_executable (info)
4808 && !SYMBOL_REFERENCES_LOCAL (info, h)
4809 && (h->type == STT_FUNC
4810 || h->type == STT_OBJECT)
4811 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4814 /* xgettext:c-format */
4815 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s"
4816 " `%s' can not be used when making a shared object"),
4818 h->type == STT_FUNC ? "function" : "data",
4819 h->root.root.string);
4820 bfd_set_error (bfd_error_bad_value);
4825 /* Note that sgot is not involved in this
4826 calculation. We always want the start of .got.plt. If we
4827 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4828 permitted by the ABI, we might have to change this
4830 relocation -= htab->elf.sgotplt->output_section->vma
4831 + htab->elf.sgotplt->output_offset;
4834 case R_X86_64_GOTPC32:
4835 case R_X86_64_GOTPC64:
4836 /* Use global offset table as symbol value. */
4837 relocation = htab->elf.sgotplt->output_section->vma
4838 + htab->elf.sgotplt->output_offset;
4839 unresolved_reloc = FALSE;
4842 case R_X86_64_PLTOFF64:
4843 /* Relocation is PLT entry relative to GOT. For local
4844 symbols it's the symbol itself relative to GOT. */
4846 /* See PLT32 handling. */
4847 && (h->plt.offset != (bfd_vma) -1
4848 || eh->plt_got.offset != (bfd_vma) -1)
4849 && htab->elf.splt != NULL)
4851 if (eh->plt_got.offset != (bfd_vma) -1)
4853 /* Use the GOT PLT. */
4854 resolved_plt = htab->plt_got;
4855 plt_offset = eh->plt_got.offset;
4857 else if (htab->plt_second != NULL)
4859 resolved_plt = htab->plt_second;
4860 plt_offset = eh->plt_second.offset;
4864 resolved_plt = htab->elf.splt;
4865 plt_offset = h->plt.offset;
4868 relocation = (resolved_plt->output_section->vma
4869 + resolved_plt->output_offset
4871 unresolved_reloc = FALSE;
4874 relocation -= htab->elf.sgotplt->output_section->vma
4875 + htab->elf.sgotplt->output_offset;
4878 case R_X86_64_PLT32:
4879 case R_X86_64_PLT32_BND:
4880 /* Relocation is to the entry for this symbol in the
4881 procedure linkage table. */
4883 /* Resolve a PLT32 reloc against a local symbol directly,
4884 without using the procedure linkage table. */
4888 if ((h->plt.offset == (bfd_vma) -1
4889 && eh->plt_got.offset == (bfd_vma) -1)
4890 || htab->elf.splt == NULL)
4892 /* We didn't make a PLT entry for this symbol. This
4893 happens when statically linking PIC code, or when
4894 using -Bsymbolic. */
4898 if (h->plt.offset != (bfd_vma) -1)
4900 if (htab->plt_second != NULL)
4902 resolved_plt = htab->plt_second;
4903 plt_offset = eh->plt_second.offset;
4907 resolved_plt = htab->elf.splt;
4908 plt_offset = h->plt.offset;
4913 /* Use the GOT PLT. */
4914 resolved_plt = htab->plt_got;
4915 plt_offset = eh->plt_got.offset;
4918 relocation = (resolved_plt->output_section->vma
4919 + resolved_plt->output_offset
4921 unresolved_reloc = FALSE;
4924 case R_X86_64_SIZE32:
4925 case R_X86_64_SIZE64:
4926 /* Set to symbol size. */
4927 relocation = st_size;
4933 case R_X86_64_PC32_BND:
4934 /* Don't complain about -fPIC if the symbol is undefined when
4935 building executable unless it is unresolved weak symbol. */
4936 if ((input_section->flags & SEC_ALLOC) != 0
4937 && (input_section->flags & SEC_READONLY) != 0
4939 && ((bfd_link_executable (info)
4940 && h->root.type == bfd_link_hash_undefweak
4941 && !resolved_to_zero)
4942 || bfd_link_dll (info)))
4944 bfd_boolean fail = FALSE;
4946 = ((r_type == R_X86_64_PC32
4947 || r_type == R_X86_64_PC32_BND)
4948 && is_32bit_relative_branch (contents, rel->r_offset));
4950 if (SYMBOL_REFERENCES_LOCAL (info, h))
4952 /* Symbol is referenced locally. Make sure it is
4953 defined locally or for a branch. */
4954 fail = (!(h->def_regular || ELF_COMMON_DEF_P (h))
4957 else if (!(bfd_link_pie (info)
4958 && (h->needs_copy || eh->needs_copy)))
4960 /* Symbol doesn't need copy reloc and isn't referenced
4961 locally. We only allow branch to symbol with
4962 non-default visibility. */
4964 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
4968 return elf_x86_64_need_pic (input_bfd, input_section,
4969 h, NULL, NULL, howto);
4978 /* FIXME: The ABI says the linker should make sure the value is
4979 the same when it's zeroextended to 64 bit. */
4982 if ((input_section->flags & SEC_ALLOC) == 0)
4985 /* Don't copy a pc-relative relocation into the output file
4986 if the symbol needs copy reloc or the symbol is undefined
4987 when building executable. Copy dynamic function pointer
4988 relocations. Don't generate dynamic relocations against
4989 resolved undefined weak symbols in PIE. */
4990 if ((bfd_link_pic (info)
4991 && !(bfd_link_pie (info)
4995 || h->root.type == bfd_link_hash_undefined)
4996 && (IS_X86_64_PCREL_TYPE (r_type)
4997 || r_type == R_X86_64_SIZE32
4998 || r_type == R_X86_64_SIZE64))
5000 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5001 && !resolved_to_zero)
5002 || h->root.type != bfd_link_hash_undefweak))
5003 && ((! IS_X86_64_PCREL_TYPE (r_type)
5004 && r_type != R_X86_64_SIZE32
5005 && r_type != R_X86_64_SIZE64)
5006 || ! SYMBOL_CALLS_LOCAL (info, h)))
5007 || (ELIMINATE_COPY_RELOCS
5008 && !bfd_link_pic (info)
5012 || eh->func_pointer_refcount > 0
5013 || (h->root.type == bfd_link_hash_undefweak
5014 && !resolved_to_zero))
5015 && ((h->def_dynamic && !h->def_regular)
5016 /* Undefined weak symbol is bound locally when
5018 || h->root.type == bfd_link_hash_undefined)))
5020 Elf_Internal_Rela outrel;
5021 bfd_boolean skip, relocate;
5024 /* When generating a shared object, these relocations
5025 are copied into the output file to be resolved at run
5031 _bfd_elf_section_offset (output_bfd, info, input_section,
5033 if (outrel.r_offset == (bfd_vma) -1)
5035 else if (outrel.r_offset == (bfd_vma) -2)
5036 skip = TRUE, relocate = TRUE;
5038 outrel.r_offset += (input_section->output_section->vma
5039 + input_section->output_offset);
5042 memset (&outrel, 0, sizeof outrel);
5044 /* h->dynindx may be -1 if this symbol was marked to
5048 && (IS_X86_64_PCREL_TYPE (r_type)
5049 || !(bfd_link_executable (info)
5050 || SYMBOLIC_BIND (info, h))
5051 || ! h->def_regular))
5053 outrel.r_info = htab->r_info (h->dynindx, r_type);
5054 outrel.r_addend = rel->r_addend;
5058 /* This symbol is local, or marked to become local.
5059 When relocation overflow check is disabled, we
5060 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
5061 if (r_type == htab->pointer_r_type
5062 || (r_type == R_X86_64_32
5063 && info->no_reloc_overflow_check))
5066 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
5067 outrel.r_addend = relocation + rel->r_addend;
5069 else if (r_type == R_X86_64_64
5070 && !ABI_64_P (output_bfd))
5073 outrel.r_info = htab->r_info (0,
5074 R_X86_64_RELATIVE64);
5075 outrel.r_addend = relocation + rel->r_addend;
5076 /* Check addend overflow. */
5077 if ((outrel.r_addend & 0x80000000)
5078 != (rel->r_addend & 0x80000000))
5081 int addend = rel->r_addend;
5082 if (h && h->root.root.string)
5083 name = h->root.root.string;
5085 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
5088 /* xgettext:c-format */
5089 (_("%B: addend %s%#x in relocation %s against "
5090 "symbol `%s' at %#Lx in section `%A' is "
5092 input_bfd, addend < 0 ? "-" : "", addend,
5093 howto->name, name, rel->r_offset, input_section);
5094 bfd_set_error (bfd_error_bad_value);
5102 if (bfd_is_abs_section (sec))
5104 else if (sec == NULL || sec->owner == NULL)
5106 bfd_set_error (bfd_error_bad_value);
5113 /* We are turning this relocation into one
5114 against a section symbol. It would be
5115 proper to subtract the symbol's value,
5116 osec->vma, from the emitted reloc addend,
5117 but ld.so expects buggy relocs. */
5118 osec = sec->output_section;
5119 sindx = elf_section_data (osec)->dynindx;
5122 asection *oi = htab->elf.text_index_section;
5123 sindx = elf_section_data (oi)->dynindx;
5125 BFD_ASSERT (sindx != 0);
5128 outrel.r_info = htab->r_info (sindx, r_type);
5129 outrel.r_addend = relocation + rel->r_addend;
5133 sreloc = elf_section_data (input_section)->sreloc;
5135 if (sreloc == NULL || sreloc->contents == NULL)
5137 r = bfd_reloc_notsupported;
5138 goto check_relocation_error;
5141 elf_append_rela (output_bfd, sreloc, &outrel);
5143 /* If this reloc is against an external symbol, we do
5144 not want to fiddle with the addend. Otherwise, we
5145 need to include the symbol value so that it becomes
5146 an addend for the dynamic reloc. */
5153 case R_X86_64_TLSGD:
5154 case R_X86_64_GOTPC32_TLSDESC:
5155 case R_X86_64_TLSDESC_CALL:
5156 case R_X86_64_GOTTPOFF:
5157 tls_type = GOT_UNKNOWN;
5158 if (h == NULL && local_got_offsets)
5159 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
5161 tls_type = elf_x86_64_hash_entry (h)->tls_type;
5163 if (! elf_x86_64_tls_transition (info, input_bfd,
5164 input_section, contents,
5165 symtab_hdr, sym_hashes,
5166 &r_type, tls_type, rel,
5167 relend, h, r_symndx, TRUE))
5170 if (r_type == R_X86_64_TPOFF32)
5172 bfd_vma roff = rel->r_offset;
5174 BFD_ASSERT (! unresolved_reloc);
5176 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
5178 /* GD->LE transition. For 64bit, change
5179 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5180 .word 0x6666; rex64; call __tls_get_addr@PLT
5182 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5184 call *__tls_get_addr@GOTPCREL(%rip)
5185 which may be converted to
5186 addr32 call __tls_get_addr
5189 leaq foo@tpoff(%rax), %rax
5191 leaq foo@tlsgd(%rip), %rdi
5192 .word 0x6666; rex64; call __tls_get_addr@PLT
5194 leaq foo@tlsgd(%rip), %rdi
5196 call *__tls_get_addr@GOTPCREL(%rip)
5197 which may be converted to
5198 addr32 call __tls_get_addr
5201 leaq foo@tpoff(%rax), %rax
5202 For largepic, change:
5203 leaq foo@tlsgd(%rip), %rdi
5204 movabsq $__tls_get_addr@pltoff, %rax
5209 leaq foo@tpoff(%rax), %rax
5210 nopw 0x0(%rax,%rax,1) */
5212 if (ABI_64_P (output_bfd))
5214 if (contents[roff + 5] == 0xb8)
5216 memcpy (contents + roff - 3,
5217 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
5218 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5222 memcpy (contents + roff - 4,
5223 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
5227 memcpy (contents + roff - 3,
5228 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
5230 bfd_put_32 (output_bfd,
5231 elf_x86_64_tpoff (info, relocation),
5232 contents + roff + 8 + largepic);
5233 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
5234 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
5239 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
5241 /* GDesc -> LE transition.
5242 It's originally something like:
5243 leaq x@tlsdesc(%rip), %rax
5246 movl $x@tpoff, %rax. */
5248 unsigned int val, type;
5250 type = bfd_get_8 (input_bfd, contents + roff - 3);
5251 val = bfd_get_8 (input_bfd, contents + roff - 1);
5252 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
5253 contents + roff - 3);
5254 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
5255 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
5256 contents + roff - 1);
5257 bfd_put_32 (output_bfd,
5258 elf_x86_64_tpoff (info, relocation),
5262 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
5264 /* GDesc -> LE transition.
5269 bfd_put_8 (output_bfd, 0x66, contents + roff);
5270 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5273 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
5275 /* IE->LE transition:
5276 For 64bit, originally it can be one of:
5277 movq foo@gottpoff(%rip), %reg
5278 addq foo@gottpoff(%rip), %reg
5281 leaq foo(%reg), %reg
5283 For 32bit, originally it can be one of:
5284 movq foo@gottpoff(%rip), %reg
5285 addl foo@gottpoff(%rip), %reg
5288 leal foo(%reg), %reg
5291 unsigned int val, type, reg;
5294 val = bfd_get_8 (input_bfd, contents + roff - 3);
5297 type = bfd_get_8 (input_bfd, contents + roff - 2);
5298 reg = bfd_get_8 (input_bfd, contents + roff - 1);
5304 bfd_put_8 (output_bfd, 0x49,
5305 contents + roff - 3);
5306 else if (!ABI_64_P (output_bfd) && val == 0x44)
5307 bfd_put_8 (output_bfd, 0x41,
5308 contents + roff - 3);
5309 bfd_put_8 (output_bfd, 0xc7,
5310 contents + roff - 2);
5311 bfd_put_8 (output_bfd, 0xc0 | reg,
5312 contents + roff - 1);
5316 /* addq/addl -> addq/addl - addressing with %rsp/%r12
5319 bfd_put_8 (output_bfd, 0x49,
5320 contents + roff - 3);
5321 else if (!ABI_64_P (output_bfd) && val == 0x44)
5322 bfd_put_8 (output_bfd, 0x41,
5323 contents + roff - 3);
5324 bfd_put_8 (output_bfd, 0x81,
5325 contents + roff - 2);
5326 bfd_put_8 (output_bfd, 0xc0 | reg,
5327 contents + roff - 1);
5331 /* addq/addl -> leaq/leal */
5333 bfd_put_8 (output_bfd, 0x4d,
5334 contents + roff - 3);
5335 else if (!ABI_64_P (output_bfd) && val == 0x44)
5336 bfd_put_8 (output_bfd, 0x45,
5337 contents + roff - 3);
5338 bfd_put_8 (output_bfd, 0x8d,
5339 contents + roff - 2);
5340 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
5341 contents + roff - 1);
5343 bfd_put_32 (output_bfd,
5344 elf_x86_64_tpoff (info, relocation),
5352 if (htab->elf.sgot == NULL)
5357 off = h->got.offset;
5358 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
5362 if (local_got_offsets == NULL)
5365 off = local_got_offsets[r_symndx];
5366 offplt = local_tlsdesc_gotents[r_symndx];
5373 Elf_Internal_Rela outrel;
5377 if (htab->elf.srelgot == NULL)
5380 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5382 if (GOT_TLS_GDESC_P (tls_type))
5384 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
5385 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
5386 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
5387 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
5388 + htab->elf.sgotplt->output_offset
5390 + htab->sgotplt_jump_table_size);
5391 sreloc = htab->elf.srelplt;
5393 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
5395 outrel.r_addend = 0;
5396 elf_append_rela (output_bfd, sreloc, &outrel);
5399 sreloc = htab->elf.srelgot;
5401 outrel.r_offset = (htab->elf.sgot->output_section->vma
5402 + htab->elf.sgot->output_offset + off);
5404 if (GOT_TLS_GD_P (tls_type))
5405 dr_type = R_X86_64_DTPMOD64;
5406 else if (GOT_TLS_GDESC_P (tls_type))
5409 dr_type = R_X86_64_TPOFF64;
5411 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
5412 outrel.r_addend = 0;
5413 if ((dr_type == R_X86_64_TPOFF64
5414 || dr_type == R_X86_64_TLSDESC) && indx == 0)
5415 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
5416 outrel.r_info = htab->r_info (indx, dr_type);
5418 elf_append_rela (output_bfd, sreloc, &outrel);
5420 if (GOT_TLS_GD_P (tls_type))
5424 BFD_ASSERT (! unresolved_reloc);
5425 bfd_put_64 (output_bfd,
5426 relocation - elf_x86_64_dtpoff_base (info),
5427 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5431 bfd_put_64 (output_bfd, 0,
5432 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5433 outrel.r_info = htab->r_info (indx,
5435 outrel.r_offset += GOT_ENTRY_SIZE;
5436 elf_append_rela (output_bfd, sreloc,
5445 local_got_offsets[r_symndx] |= 1;
5448 if (off >= (bfd_vma) -2
5449 && ! GOT_TLS_GDESC_P (tls_type))
5451 if (r_type == ELF32_R_TYPE (rel->r_info))
5453 if (r_type == R_X86_64_GOTPC32_TLSDESC
5454 || r_type == R_X86_64_TLSDESC_CALL)
5455 relocation = htab->elf.sgotplt->output_section->vma
5456 + htab->elf.sgotplt->output_offset
5457 + offplt + htab->sgotplt_jump_table_size;
5459 relocation = htab->elf.sgot->output_section->vma
5460 + htab->elf.sgot->output_offset + off;
5461 unresolved_reloc = FALSE;
5465 bfd_vma roff = rel->r_offset;
5467 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
5469 /* GD->IE transition. For 64bit, change
5470 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5471 .word 0x6666; rex64; call __tls_get_addr@PLT
5473 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5475 call *__tls_get_addr@GOTPCREL(%rip
5476 which may be converted to
5477 addr32 call __tls_get_addr
5480 addq foo@gottpoff(%rip), %rax
5482 leaq foo@tlsgd(%rip), %rdi
5483 .word 0x6666; rex64; call __tls_get_addr@PLT
5485 leaq foo@tlsgd(%rip), %rdi
5487 call *__tls_get_addr@GOTPCREL(%rip)
5488 which may be converted to
5489 addr32 call __tls_get_addr
5492 addq foo@gottpoff(%rip), %rax
5493 For largepic, change:
5494 leaq foo@tlsgd(%rip), %rdi
5495 movabsq $__tls_get_addr@pltoff, %rax
5500 addq foo@gottpoff(%rax), %rax
5501 nopw 0x0(%rax,%rax,1) */
5503 if (ABI_64_P (output_bfd))
5505 if (contents[roff + 5] == 0xb8)
5507 memcpy (contents + roff - 3,
5508 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
5509 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5513 memcpy (contents + roff - 4,
5514 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5518 memcpy (contents + roff - 3,
5519 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5522 relocation = (htab->elf.sgot->output_section->vma
5523 + htab->elf.sgot->output_offset + off
5526 - input_section->output_section->vma
5527 - input_section->output_offset
5529 bfd_put_32 (output_bfd, relocation,
5530 contents + roff + 8 + largepic);
5531 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
5536 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
5538 /* GDesc -> IE transition.
5539 It's originally something like:
5540 leaq x@tlsdesc(%rip), %rax
5543 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
5545 /* Now modify the instruction as appropriate. To
5546 turn a leaq into a movq in the form we use it, it
5547 suffices to change the second byte from 0x8d to
5549 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
5551 bfd_put_32 (output_bfd,
5552 htab->elf.sgot->output_section->vma
5553 + htab->elf.sgot->output_offset + off
5555 - input_section->output_section->vma
5556 - input_section->output_offset
5561 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
5563 /* GDesc -> IE transition.
5570 bfd_put_8 (output_bfd, 0x66, contents + roff);
5571 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5579 case R_X86_64_TLSLD:
5580 if (! elf_x86_64_tls_transition (info, input_bfd,
5581 input_section, contents,
5582 symtab_hdr, sym_hashes,
5583 &r_type, GOT_UNKNOWN, rel,
5584 relend, h, r_symndx, TRUE))
5587 if (r_type != R_X86_64_TLSLD)
5589 /* LD->LE transition:
5590 leaq foo@tlsld(%rip), %rdi
5591 call __tls_get_addr@PLT
5592 For 64bit, we change it into:
5593 .word 0x6666; .byte 0x66; movq %fs:0, %rax
5594 For 32bit, we change it into:
5595 nopl 0x0(%rax); movl %fs:0, %eax
5597 leaq foo@tlsld(%rip), %rdi;
5598 call *__tls_get_addr@GOTPCREL(%rip)
5599 which may be converted to
5600 addr32 call __tls_get_addr
5601 For 64bit, we change it into:
5602 .word 0x6666; .word 0x6666; movq %fs:0, %rax
5603 For 32bit, we change it into:
5604 nopw 0x0(%rax); movl %fs:0, %eax
5605 For largepic, change:
5606 leaq foo@tlsgd(%rip), %rdi
5607 movabsq $__tls_get_addr@pltoff, %rax
5611 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
5614 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
5615 if (ABI_64_P (output_bfd))
5617 if (contents[rel->r_offset + 5] == 0xb8)
5618 memcpy (contents + rel->r_offset - 3,
5619 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
5620 "\x64\x48\x8b\x04\x25\0\0\0", 22);
5621 else if (contents[rel->r_offset + 4] == 0xff
5622 || contents[rel->r_offset + 4] == 0x67)
5623 memcpy (contents + rel->r_offset - 3,
5624 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
5627 memcpy (contents + rel->r_offset - 3,
5628 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
5632 if (contents[rel->r_offset + 4] == 0xff)
5633 memcpy (contents + rel->r_offset - 3,
5634 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
5637 memcpy (contents + rel->r_offset - 3,
5638 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5640 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
5641 and R_X86_64_PLTOFF64. */
5647 if (htab->elf.sgot == NULL)
5650 off = htab->tls_ld_got.offset;
5655 Elf_Internal_Rela outrel;
5657 if (htab->elf.srelgot == NULL)
5660 outrel.r_offset = (htab->elf.sgot->output_section->vma
5661 + htab->elf.sgot->output_offset + off);
5663 bfd_put_64 (output_bfd, 0,
5664 htab->elf.sgot->contents + off);
5665 bfd_put_64 (output_bfd, 0,
5666 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5667 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
5668 outrel.r_addend = 0;
5669 elf_append_rela (output_bfd, htab->elf.srelgot,
5671 htab->tls_ld_got.offset |= 1;
5673 relocation = htab->elf.sgot->output_section->vma
5674 + htab->elf.sgot->output_offset + off;
5675 unresolved_reloc = FALSE;
5678 case R_X86_64_DTPOFF32:
5679 if (!bfd_link_executable (info)
5680 || (input_section->flags & SEC_CODE) == 0)
5681 relocation -= elf_x86_64_dtpoff_base (info);
5683 relocation = elf_x86_64_tpoff (info, relocation);
5686 case R_X86_64_TPOFF32:
5687 case R_X86_64_TPOFF64:
5688 BFD_ASSERT (bfd_link_executable (info));
5689 relocation = elf_x86_64_tpoff (info, relocation);
5692 case R_X86_64_DTPOFF64:
5693 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
5694 relocation -= elf_x86_64_dtpoff_base (info);
5701 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5702 because such sections are not SEC_ALLOC and thus ld.so will
5703 not process them. */
5704 if (unresolved_reloc
5705 && !((input_section->flags & SEC_DEBUGGING) != 0
5707 && _bfd_elf_section_offset (output_bfd, info, input_section,
5708 rel->r_offset) != (bfd_vma) -1)
5711 /* xgettext:c-format */
5712 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
5717 h->root.root.string);
5722 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5723 contents, rel->r_offset,
5724 relocation, rel->r_addend);
5726 check_relocation_error:
5727 if (r != bfd_reloc_ok)
5732 name = h->root.root.string;
5735 name = bfd_elf_string_from_elf_section (input_bfd,
5736 symtab_hdr->sh_link,
5741 name = bfd_section_name (input_bfd, sec);
5744 if (r == bfd_reloc_overflow)
5745 (*info->callbacks->reloc_overflow)
5746 (info, (h ? &h->root : NULL), name, howto->name,
5747 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5751 /* xgettext:c-format */
5752 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
5753 input_bfd, input_section,
5754 rel->r_offset, name, (int) r);
5765 Elf_Internal_Shdr *rel_hdr;
5766 size_t deleted = rel - wrel;
5768 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5769 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5770 if (rel_hdr->sh_size == 0)
5772 /* It is too late to remove an empty reloc section. Leave
5774 ??? What is wrong with an empty section??? */
5775 rel_hdr->sh_size = rel_hdr->sh_entsize;
5778 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5779 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5780 input_section->reloc_count -= deleted;
5786 /* Finish up dynamic symbol handling. We set the contents of various
5787 dynamic sections here. */
5790 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
5791 struct bfd_link_info *info,
5792 struct elf_link_hash_entry *h,
5793 Elf_Internal_Sym *sym)
5795 struct elf_x86_64_link_hash_table *htab;
5796 bfd_boolean use_plt_second;
5797 struct elf_x86_64_link_hash_entry *eh;
5798 bfd_boolean local_undefweak;
5800 htab = elf_x86_64_hash_table (info);
5804 /* Use the second PLT section only if there is .plt section. */
5805 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
5807 eh = (struct elf_x86_64_link_hash_entry *) h;
5808 if (eh->no_finish_dynamic_symbol)
5811 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5812 resolved undefined weak symbols in executable so that their
5813 references have value 0 at run-time. */
5814 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
5818 if (h->plt.offset != (bfd_vma) -1)
5821 bfd_vma got_offset, plt_offset;
5822 Elf_Internal_Rela rela;
5824 asection *plt, *gotplt, *relplt, *resolved_plt;
5825 const struct elf_backend_data *bed;
5826 bfd_vma plt_got_pcrel_offset;
5828 /* When building a static executable, use .iplt, .igot.plt and
5829 .rela.iplt sections for STT_GNU_IFUNC symbols. */
5830 if (htab->elf.splt != NULL)
5832 plt = htab->elf.splt;
5833 gotplt = htab->elf.sgotplt;
5834 relplt = htab->elf.srelplt;
5838 plt = htab->elf.iplt;
5839 gotplt = htab->elf.igotplt;
5840 relplt = htab->elf.irelplt;
5843 /* This symbol has an entry in the procedure linkage table. Set
5845 if ((h->dynindx == -1
5847 && !((h->forced_local || bfd_link_executable (info))
5849 && h->type == STT_GNU_IFUNC))
5855 /* Get the index in the procedure linkage table which
5856 corresponds to this symbol. This is the index of this symbol
5857 in all the symbols for which we are making plt entries. The
5858 first entry in the procedure linkage table is reserved.
5860 Get the offset into the .got table of the entry that
5861 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5862 bytes. The first three are reserved for the dynamic linker.
5864 For static executables, we don't reserve anything. */
5866 if (plt == htab->elf.splt)
5868 got_offset = (h->plt.offset / htab->plt.plt_entry_size
5869 - htab->plt.has_plt0);
5870 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
5874 got_offset = h->plt.offset / htab->plt.plt_entry_size;
5875 got_offset = got_offset * GOT_ENTRY_SIZE;
5878 /* Fill in the entry in the procedure linkage table. */
5879 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
5880 htab->plt.plt_entry_size);
5883 memcpy (htab->plt_second->contents + eh->plt_second.offset,
5884 htab->non_lazy_plt->plt_entry,
5885 htab->non_lazy_plt->plt_entry_size);
5887 resolved_plt = htab->plt_second;
5888 plt_offset = eh->plt_second.offset;
5893 plt_offset = h->plt.offset;
5896 /* Insert the relocation positions of the plt section. */
5898 /* Put offset the PC-relative instruction referring to the GOT entry,
5899 subtracting the size of that instruction. */
5900 plt_got_pcrel_offset = (gotplt->output_section->vma
5901 + gotplt->output_offset
5903 - resolved_plt->output_section->vma
5904 - resolved_plt->output_offset
5906 - htab->plt.plt_got_insn_size);
5908 /* Check PC-relative offset overflow in PLT entry. */
5909 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
5910 /* xgettext:c-format */
5911 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5912 output_bfd, h->root.root.string);
5914 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
5915 (resolved_plt->contents + plt_offset
5916 + htab->plt.plt_got_offset));
5918 /* Fill in the entry in the global offset table, initially this
5919 points to the second part of the PLT entry. Leave the entry
5920 as zero for undefined weak symbol in PIE. No PLT relocation
5921 against undefined weak symbol in PIE. */
5922 if (!local_undefweak)
5924 if (htab->plt.has_plt0)
5925 bfd_put_64 (output_bfd, (plt->output_section->vma
5926 + plt->output_offset
5928 + htab->lazy_plt->plt_lazy_offset),
5929 gotplt->contents + got_offset);
5931 /* Fill in the entry in the .rela.plt section. */
5932 rela.r_offset = (gotplt->output_section->vma
5933 + gotplt->output_offset
5935 if (h->dynindx == -1
5936 || ((bfd_link_executable (info)
5937 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5939 && h->type == STT_GNU_IFUNC))
5941 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5942 h->root.root.string,
5943 h->root.u.def.section->owner);
5945 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5946 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5947 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
5948 rela.r_addend = (h->root.u.def.value
5949 + h->root.u.def.section->output_section->vma
5950 + h->root.u.def.section->output_offset);
5951 /* R_X86_64_IRELATIVE comes last. */
5952 plt_index = htab->next_irelative_index--;
5956 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
5958 plt_index = htab->next_jump_slot_index++;
5961 /* Don't fill the second and third slots in PLT entry for
5962 static executables nor without PLT0. */
5963 if (plt == htab->elf.splt && htab->plt.has_plt0)
5966 = h->plt.offset + htab->lazy_plt->plt_plt_insn_end;
5968 /* Put relocation index. */
5969 bfd_put_32 (output_bfd, plt_index,
5970 (plt->contents + h->plt.offset
5971 + htab->lazy_plt->plt_reloc_offset));
5973 /* Put offset for jmp .PLT0 and check for overflow. We don't
5974 check relocation index for overflow since branch displacement
5975 will overflow first. */
5976 if (plt0_offset > 0x80000000)
5977 /* xgettext:c-format */
5978 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5979 output_bfd, h->root.root.string);
5980 bfd_put_32 (output_bfd, - plt0_offset,
5981 (plt->contents + h->plt.offset
5982 + htab->lazy_plt->plt_plt_offset));
5985 bed = get_elf_backend_data (output_bfd);
5986 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
5987 bed->s->swap_reloca_out (output_bfd, &rela, loc);
5990 else if (eh->plt_got.offset != (bfd_vma) -1)
5992 bfd_vma got_offset, plt_offset;
5993 asection *plt, *got;
5994 bfd_boolean got_after_plt;
5995 int32_t got_pcrel_offset;
5997 /* Set the entry in the GOT procedure linkage table. */
5998 plt = htab->plt_got;
5999 got = htab->elf.sgot;
6000 got_offset = h->got.offset;
6002 if (got_offset == (bfd_vma) -1
6003 || (h->type == STT_GNU_IFUNC && h->def_regular)
6008 /* Use the non-lazy PLT entry template for the GOT PLT since they
6009 are the identical. */
6010 /* Fill in the entry in the GOT procedure linkage table. */
6011 plt_offset = eh->plt_got.offset;
6012 memcpy (plt->contents + plt_offset,
6013 htab->non_lazy_plt->plt_entry,
6014 htab->non_lazy_plt->plt_entry_size);
6016 /* Put offset the PC-relative instruction referring to the GOT
6017 entry, subtracting the size of that instruction. */
6018 got_pcrel_offset = (got->output_section->vma
6019 + got->output_offset
6021 - plt->output_section->vma
6022 - plt->output_offset
6024 - htab->non_lazy_plt->plt_got_insn_size);
6026 /* Check PC-relative offset overflow in GOT PLT entry. */
6027 got_after_plt = got->output_section->vma > plt->output_section->vma;
6028 if ((got_after_plt && got_pcrel_offset < 0)
6029 || (!got_after_plt && got_pcrel_offset > 0))
6030 /* xgettext:c-format */
6031 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
6032 output_bfd, h->root.root.string);
6034 bfd_put_32 (output_bfd, got_pcrel_offset,
6035 (plt->contents + plt_offset
6036 + htab->non_lazy_plt->plt_got_offset));
6039 if (!local_undefweak
6041 && (h->plt.offset != (bfd_vma) -1
6042 || eh->plt_got.offset != (bfd_vma) -1))
6044 /* Mark the symbol as undefined, rather than as defined in
6045 the .plt section. Leave the value if there were any
6046 relocations where pointer equality matters (this is a clue
6047 for the dynamic linker, to make function pointer
6048 comparisons work between an application and shared
6049 library), otherwise set it to zero. If a function is only
6050 called from a binary, there is no need to slow down
6051 shared libraries because of that. */
6052 sym->st_shndx = SHN_UNDEF;
6053 if (!h->pointer_equality_needed)
6057 /* Don't generate dynamic GOT relocation against undefined weak
6058 symbol in executable. */
6059 if (h->got.offset != (bfd_vma) -1
6060 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
6061 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE
6062 && !local_undefweak)
6064 Elf_Internal_Rela rela;
6065 asection *relgot = htab->elf.srelgot;
6067 /* This symbol has an entry in the global offset table. Set it
6069 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
6072 rela.r_offset = (htab->elf.sgot->output_section->vma
6073 + htab->elf.sgot->output_offset
6074 + (h->got.offset &~ (bfd_vma) 1));
6076 /* If this is a static link, or it is a -Bsymbolic link and the
6077 symbol is defined locally or was forced to be local because
6078 of a version file, we just want to emit a RELATIVE reloc.
6079 The entry in the global offset table will already have been
6080 initialized in the relocate_section function. */
6082 && h->type == STT_GNU_IFUNC)
6084 if (h->plt.offset == (bfd_vma) -1)
6086 /* STT_GNU_IFUNC is referenced without PLT. */
6087 if (htab->elf.splt == NULL)
6089 /* use .rel[a].iplt section to store .got relocations
6090 in static executable. */
6091 relgot = htab->elf.irelplt;
6093 if (SYMBOL_REFERENCES_LOCAL (info, h))
6095 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
6097 h->root.root.string,
6098 h->root.u.def.section->owner);
6100 rela.r_info = htab->r_info (0,
6101 R_X86_64_IRELATIVE);
6102 rela.r_addend = (h->root.u.def.value
6103 + h->root.u.def.section->output_section->vma
6104 + h->root.u.def.section->output_offset);
6109 else if (bfd_link_pic (info))
6111 /* Generate R_X86_64_GLOB_DAT. */
6119 if (!h->pointer_equality_needed)
6122 /* For non-shared object, we can't use .got.plt, which
6123 contains the real function addres if we need pointer
6124 equality. We load the GOT entry with the PLT entry. */
6125 if (htab->plt_second != NULL)
6127 plt = htab->plt_second;
6128 plt_offset = eh->plt_second.offset;
6132 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
6133 plt_offset = h->plt.offset;
6135 bfd_put_64 (output_bfd, (plt->output_section->vma
6136 + plt->output_offset
6138 htab->elf.sgot->contents + h->got.offset);
6142 else if (bfd_link_pic (info)
6143 && SYMBOL_REFERENCES_LOCAL (info, h))
6145 if (!h->def_regular)
6147 BFD_ASSERT((h->got.offset & 1) != 0);
6148 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
6149 rela.r_addend = (h->root.u.def.value
6150 + h->root.u.def.section->output_section->vma
6151 + h->root.u.def.section->output_offset);
6155 BFD_ASSERT((h->got.offset & 1) == 0);
6157 bfd_put_64 (output_bfd, (bfd_vma) 0,
6158 htab->elf.sgot->contents + h->got.offset);
6159 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
6163 elf_append_rela (output_bfd, relgot, &rela);
6168 Elf_Internal_Rela rela;
6171 /* This symbol needs a copy reloc. Set it up. */
6173 if (h->dynindx == -1
6174 || (h->root.type != bfd_link_hash_defined
6175 && h->root.type != bfd_link_hash_defweak)
6176 || htab->elf.srelbss == NULL
6177 || htab->elf.sreldynrelro == NULL)
6180 rela.r_offset = (h->root.u.def.value
6181 + h->root.u.def.section->output_section->vma
6182 + h->root.u.def.section->output_offset);
6183 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
6185 if (h->root.u.def.section == htab->elf.sdynrelro)
6186 s = htab->elf.sreldynrelro;
6188 s = htab->elf.srelbss;
6189 elf_append_rela (output_bfd, s, &rela);
6195 /* Finish up local dynamic symbol handling. We set the contents of
6196 various dynamic sections here. */
6199 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
6201 struct elf_link_hash_entry *h
6202 = (struct elf_link_hash_entry *) *slot;
6203 struct bfd_link_info *info
6204 = (struct bfd_link_info *) inf;
6206 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
6210 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
6211 here since undefined weak symbol may not be dynamic and may not be
6212 called for elf_x86_64_finish_dynamic_symbol. */
6215 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
6218 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
6219 struct bfd_link_info *info = (struct bfd_link_info *) inf;
6221 if (h->root.type != bfd_link_hash_undefweak
6222 || h->dynindx != -1)
6225 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
6229 /* Used to decide how to sort relocs in an optimal manner for the
6230 dynamic linker, before writing them out. */
6232 static enum elf_reloc_type_class
6233 elf_x86_64_reloc_type_class (const struct bfd_link_info *info,
6234 const asection *rel_sec ATTRIBUTE_UNUSED,
6235 const Elf_Internal_Rela *rela)
6237 bfd *abfd = info->output_bfd;
6238 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6239 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
6241 if (htab->elf.dynsym != NULL
6242 && htab->elf.dynsym->contents != NULL)
6244 /* Check relocation against STT_GNU_IFUNC symbol if there are
6246 unsigned long r_symndx = htab->r_sym (rela->r_info);
6247 if (r_symndx != STN_UNDEF)
6249 Elf_Internal_Sym sym;
6250 if (!bed->s->swap_symbol_in (abfd,
6251 (htab->elf.dynsym->contents
6252 + r_symndx * bed->s->sizeof_sym),
6256 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
6257 return reloc_class_ifunc;
6261 switch ((int) ELF32_R_TYPE (rela->r_info))
6263 case R_X86_64_IRELATIVE:
6264 return reloc_class_ifunc;
6265 case R_X86_64_RELATIVE:
6266 case R_X86_64_RELATIVE64:
6267 return reloc_class_relative;
6268 case R_X86_64_JUMP_SLOT:
6269 return reloc_class_plt;
6271 return reloc_class_copy;
6273 return reloc_class_normal;
6277 /* Finish up the dynamic sections. */
6280 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
6281 struct bfd_link_info *info)
6283 struct elf_x86_64_link_hash_table *htab;
6287 htab = elf_x86_64_hash_table (info);
6291 dynobj = htab->elf.dynobj;
6292 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
6294 if (htab->elf.dynamic_sections_created)
6296 bfd_byte *dyncon, *dynconend;
6297 const struct elf_backend_data *bed;
6298 bfd_size_type sizeof_dyn;
6300 if (sdyn == NULL || htab->elf.sgot == NULL)
6303 bed = get_elf_backend_data (dynobj);
6304 sizeof_dyn = bed->s->sizeof_dyn;
6305 dyncon = sdyn->contents;
6306 dynconend = sdyn->contents + sdyn->size;
6307 for (; dyncon < dynconend; dyncon += sizeof_dyn)
6309 Elf_Internal_Dyn dyn;
6312 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
6320 s = htab->elf.sgotplt;
6321 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6325 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
6329 s = htab->elf.srelplt->output_section;
6330 dyn.d_un.d_val = s->size;
6333 case DT_TLSDESC_PLT:
6335 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
6336 + htab->tlsdesc_plt;
6339 case DT_TLSDESC_GOT:
6341 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
6342 + htab->tlsdesc_got;
6346 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
6349 if (htab->elf.splt && htab->elf.splt->size > 0)
6351 elf_section_data (htab->elf.splt->output_section)
6352 ->this_hdr.sh_entsize = htab->plt.plt_entry_size;
6354 if (htab->plt.has_plt0)
6356 /* Fill in the special first entry in the procedure linkage
6358 memcpy (htab->elf.splt->contents,
6359 htab->lazy_plt->plt0_entry,
6360 htab->lazy_plt->plt_entry_size);
6361 /* Add offset for pushq GOT+8(%rip), since the instruction
6362 uses 6 bytes subtract this value. */
6363 bfd_put_32 (output_bfd,
6364 (htab->elf.sgotplt->output_section->vma
6365 + htab->elf.sgotplt->output_offset
6367 - htab->elf.splt->output_section->vma
6368 - htab->elf.splt->output_offset
6370 (htab->elf.splt->contents
6371 + htab->lazy_plt->plt0_got1_offset));
6372 /* Add offset for the PC-relative instruction accessing
6373 GOT+16, subtracting the offset to the end of that
6375 bfd_put_32 (output_bfd,
6376 (htab->elf.sgotplt->output_section->vma
6377 + htab->elf.sgotplt->output_offset
6379 - htab->elf.splt->output_section->vma
6380 - htab->elf.splt->output_offset
6381 - htab->lazy_plt->plt0_got2_insn_end),
6382 (htab->elf.splt->contents
6383 + htab->lazy_plt->plt0_got2_offset));
6385 if (htab->tlsdesc_plt)
6387 bfd_put_64 (output_bfd, (bfd_vma) 0,
6388 htab->elf.sgot->contents + htab->tlsdesc_got);
6390 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
6391 htab->lazy_plt->plt0_entry,
6392 htab->lazy_plt->plt_entry_size);
6394 /* Add offset for pushq GOT+8(%rip), since the
6395 instruction uses 6 bytes subtract this value. */
6396 bfd_put_32 (output_bfd,
6397 (htab->elf.sgotplt->output_section->vma
6398 + htab->elf.sgotplt->output_offset
6400 - htab->elf.splt->output_section->vma
6401 - htab->elf.splt->output_offset
6404 (htab->elf.splt->contents
6406 + htab->lazy_plt->plt0_got1_offset));
6407 /* Add offset for the PC-relative instruction accessing
6408 GOT+TDG, where TDG stands for htab->tlsdesc_got,
6409 subtracting the offset to the end of that
6411 bfd_put_32 (output_bfd,
6412 (htab->elf.sgot->output_section->vma
6413 + htab->elf.sgot->output_offset
6415 - htab->elf.splt->output_section->vma
6416 - htab->elf.splt->output_offset
6418 - htab->lazy_plt->plt0_got2_insn_end),
6419 (htab->elf.splt->contents
6421 + htab->lazy_plt->plt0_got2_offset));
6427 if (htab->plt_got != NULL && htab->plt_got->size > 0)
6428 elf_section_data (htab->plt_got->output_section)
6429 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
6431 if (htab->plt_second != NULL && htab->plt_second->size > 0)
6432 elf_section_data (htab->plt_second->output_section)
6433 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
6435 /* GOT is always created in setup_gnu_properties. But it may not be
6437 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
6439 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
6442 (_("discarded output section: `%A'"), htab->elf.sgotplt);
6446 /* Set the first entry in the global offset table to the address of
6447 the dynamic section. */
6449 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
6451 bfd_put_64 (output_bfd,
6452 sdyn->output_section->vma + sdyn->output_offset,
6453 htab->elf.sgotplt->contents);
6454 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
6455 bfd_put_64 (output_bfd, (bfd_vma) 0,
6456 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
6457 bfd_put_64 (output_bfd, (bfd_vma) 0,
6458 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
6460 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize
6464 /* Adjust .eh_frame for .plt section. */
6465 if (htab->plt_eh_frame != NULL
6466 && htab->plt_eh_frame->contents != NULL)
6468 if (htab->elf.splt != NULL
6469 && htab->elf.splt->size != 0
6470 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
6471 && htab->elf.splt->output_section != NULL
6472 && htab->plt_eh_frame->output_section != NULL)
6474 bfd_vma plt_start = htab->elf.splt->output_section->vma;
6475 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
6476 + htab->plt_eh_frame->output_offset
6477 + PLT_FDE_START_OFFSET;
6478 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6479 htab->plt_eh_frame->contents
6480 + PLT_FDE_START_OFFSET);
6482 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
6484 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6486 htab->plt_eh_frame->contents))
6491 /* Adjust .eh_frame for .plt.got section. */
6492 if (htab->plt_got_eh_frame != NULL
6493 && htab->plt_got_eh_frame->contents != NULL)
6495 if (htab->plt_got != NULL
6496 && htab->plt_got->size != 0
6497 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
6498 && htab->plt_got->output_section != NULL
6499 && htab->plt_got_eh_frame->output_section != NULL)
6501 bfd_vma plt_start = htab->plt_got->output_section->vma;
6502 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
6503 + htab->plt_got_eh_frame->output_offset
6504 + PLT_FDE_START_OFFSET;
6505 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6506 htab->plt_got_eh_frame->contents
6507 + PLT_FDE_START_OFFSET);
6509 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
6511 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6512 htab->plt_got_eh_frame,
6513 htab->plt_got_eh_frame->contents))
6518 /* Adjust .eh_frame for the second PLT section. */
6519 if (htab->plt_second_eh_frame != NULL
6520 && htab->plt_second_eh_frame->contents != NULL)
6522 if (htab->plt_second != NULL
6523 && htab->plt_second->size != 0
6524 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
6525 && htab->plt_second->output_section != NULL
6526 && htab->plt_second_eh_frame->output_section != NULL)
6528 bfd_vma plt_start = htab->plt_second->output_section->vma;
6529 bfd_vma eh_frame_start
6530 = (htab->plt_second_eh_frame->output_section->vma
6531 + htab->plt_second_eh_frame->output_offset
6532 + PLT_FDE_START_OFFSET);
6533 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6534 htab->plt_second_eh_frame->contents
6535 + PLT_FDE_START_OFFSET);
6537 if (htab->plt_second_eh_frame->sec_info_type
6538 == SEC_INFO_TYPE_EH_FRAME)
6540 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6541 htab->plt_second_eh_frame,
6542 htab->plt_second_eh_frame->contents))
6547 if (htab->elf.sgot && htab->elf.sgot->size > 0)
6548 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
6551 /* Fill PLT entries for undefined weak symbols in PIE. */
6552 if (bfd_link_pie (info))
6553 bfd_hash_traverse (&info->hash->table,
6554 elf_x86_64_pie_finish_undefweak_symbol,
6560 /* Fill PLT/GOT entries and allocate dynamic relocations for local
6561 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
6562 It has to be done before elf_link_sort_relocs is called so that
6563 dynamic relocations are properly sorted. */
6566 elf_x86_64_output_arch_local_syms
6567 (bfd *output_bfd ATTRIBUTE_UNUSED,
6568 struct bfd_link_info *info,
6569 void *flaginfo ATTRIBUTE_UNUSED,
6570 int (*func) (void *, const char *,
6573 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
6575 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
6579 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6580 htab_traverse (htab->loc_hash_table,
6581 elf_x86_64_finish_local_dynamic_symbol,
6587 /* Sort relocs into address order. */
6590 compare_relocs (const void *ap, const void *bp)
6592 const arelent *a = * (const arelent **) ap;
6593 const arelent *b = * (const arelent **) bp;
6595 if (a->address > b->address)
6597 else if (a->address < b->address)
6603 enum elf_x86_64_plt_type
6607 plt_second = 1 << 1,
6611 struct elf_x86_64_plt
6616 enum elf_x86_64_plt_type type;
6617 unsigned int plt_got_offset;
6618 unsigned int plt_got_insn_size;
6619 unsigned int plt_entry_size;
6623 /* Forward declaration. */
6624 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt;
6626 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
6627 dynamic relocations. */
6630 elf_x86_64_get_synthetic_symtab (bfd *abfd,
6631 long symcount ATTRIBUTE_UNUSED,
6632 asymbol **syms ATTRIBUTE_UNUSED,
6637 long size, count, i, n, len;
6639 unsigned int plt_got_offset, plt_entry_size, plt_got_insn_size;
6641 bfd_byte *plt_contents;
6642 long dynrelcount, relsize;
6643 arelent **dynrelbuf, *p;
6644 const struct elf_x86_64_lazy_plt_layout *lazy_plt;
6645 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_plt;
6646 const struct elf_x86_64_lazy_plt_layout *lazy_bnd_plt;
6647 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_bnd_plt;
6648 const struct elf_x86_64_lazy_plt_layout *lazy_ibt_plt;
6649 const struct elf_x86_64_non_lazy_plt_layout *non_lazy_ibt_plt;
6652 enum elf_x86_64_plt_type plt_type;
6653 struct elf_x86_64_plt plts[] =
6655 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
6656 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
6657 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
6658 { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 },
6659 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
6664 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
6667 if (dynsymcount <= 0)
6670 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
6674 dynrelbuf = (arelent **) bfd_malloc (relsize);
6675 if (dynrelbuf == NULL)
6678 dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf,
6681 /* Sort the relocs by address. */
6682 qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs);
6684 if (get_elf_x86_64_backend_data (abfd)->os == is_normal)
6686 lazy_plt = &elf_x86_64_lazy_plt;
6687 non_lazy_plt = &elf_x86_64_non_lazy_plt;
6688 lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt;
6689 non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt;
6690 if (ABI_64_P (abfd))
6692 lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt;
6693 non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt;
6697 lazy_ibt_plt = &elf_x32_lazy_ibt_plt;
6698 non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt;
6703 lazy_plt = &elf_x86_64_nacl_plt;
6704 non_lazy_plt = NULL;
6705 lazy_bnd_plt = NULL;
6706 non_lazy_bnd_plt = NULL;
6707 lazy_ibt_plt = NULL;
6708 non_lazy_ibt_plt = NULL;
6712 for (j = 0; plts[j].name != NULL; j++)
6714 plt = bfd_get_section_by_name (abfd, plts[j].name);
6718 /* Get the PLT section contents. */
6719 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
6720 if (plt_contents == NULL)
6722 if (!bfd_get_section_contents (abfd, (asection *) plt,
6723 plt_contents, 0, plt->size))
6725 free (plt_contents);
6729 /* Check what kind of PLT it is. */
6730 plt_type = plt_unknown;
6731 if (plts[j].type == plt_unknown)
6733 /* Match lazy PLT first. Need to check the first two
6735 if ((memcmp (plt_contents, lazy_plt->plt0_entry,
6736 lazy_plt->plt0_got1_offset) == 0)
6737 && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6,
6739 plt_type = plt_lazy;
6740 else if (lazy_bnd_plt != NULL
6741 && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry,
6742 lazy_bnd_plt->plt0_got1_offset) == 0)
6743 && (memcmp (plt_contents + 6,
6744 lazy_bnd_plt->plt0_entry + 6, 3) == 0))
6746 plt_type = plt_lazy | plt_second;
6747 /* The fist entry in the lazy IBT PLT is the same as the
6749 if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size,
6750 lazy_ibt_plt->plt_entry,
6751 lazy_ibt_plt->plt_got_offset) == 0))
6752 lazy_plt = lazy_ibt_plt;
6754 lazy_plt = lazy_bnd_plt;
6758 if (non_lazy_plt != NULL
6759 && (plt_type == plt_unknown || plt_type == plt_non_lazy))
6761 /* Match non-lazy PLT. */
6762 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
6763 non_lazy_plt->plt_got_offset) == 0)
6764 plt_type = plt_non_lazy;
6767 if (plt_type == plt_unknown || plt_type == plt_second)
6769 if (non_lazy_bnd_plt != NULL
6770 && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry,
6771 non_lazy_bnd_plt->plt_got_offset) == 0))
6773 /* Match BND PLT. */
6774 plt_type = plt_second;
6775 non_lazy_plt = non_lazy_bnd_plt;
6777 else if (non_lazy_ibt_plt != NULL
6778 && (memcmp (plt_contents,
6779 non_lazy_ibt_plt->plt_entry,
6780 non_lazy_ibt_plt->plt_got_offset) == 0))
6782 /* Match IBT PLT. */
6783 plt_type = plt_second;
6784 non_lazy_plt = non_lazy_ibt_plt;
6788 if (plt_type == plt_unknown)
6792 plts[j].type = plt_type;
6794 if ((plt_type & plt_lazy))
6796 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
6797 plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size;
6798 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
6799 /* Skip PLT0 in lazy PLT. */
6804 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
6805 plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size;
6806 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
6810 /* Skip lazy PLT when the second PLT is used. */
6811 if (plt_type == (plt_lazy | plt_second))
6815 n = plt->size / plts[j].plt_entry_size;
6820 plts[j].contents = plt_contents;
6823 size = count * sizeof (asymbol);
6825 /* Allocate space for @plt suffixes. */
6827 for (i = 0; i < dynrelcount; i++)
6830 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
6832 size += sizeof ("+0x") - 1 + 8 + 8 * ABI_64_P (abfd);
6835 s = *ret = (asymbol *) bfd_zmalloc (size);
6839 for (j = 0; plts[j].name != NULL; j++)
6840 if (plts[j].contents != NULL)
6841 free (plts[j].contents);
6846 /* Check for each PLT section. */
6847 names = (char *) (s + count);
6850 for (j = 0; plts[j].name != NULL; j++)
6851 if ((plt_contents = plts[j].contents) != NULL)
6856 plt_got_offset = plts[j].plt_got_offset;
6857 plt_got_insn_size = plts[j].plt_got_insn_size;
6858 plt_entry_size = plts[j].plt_entry_size;
6862 if ((plts[j].type & plt_lazy))
6864 /* Skip PLT0 in lazy PLT. */
6866 offset = plt_entry_size;
6874 /* Check each PLT entry against dynamic relocations. */
6875 for (; k < plts[j].count; k++)
6881 /* Get the PC-relative offset, a signed 32-bit integer. */
6882 off = H_GET_32 (abfd, (plt_contents + offset
6884 got_vma = plt->vma + offset + off + plt_got_insn_size;
6886 /* Binary search. */
6890 while ((min + 1) < max)
6894 mid = (min + max) / 2;
6896 if (got_vma > r->address)
6898 else if (got_vma < r->address)
6907 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6908 if (got_vma == p->address
6910 && (p->howto->type == R_X86_64_JUMP_SLOT
6911 || p->howto->type == R_X86_64_GLOB_DAT
6912 || p->howto->type == R_X86_64_IRELATIVE))
6914 *s = **p->sym_ptr_ptr;
6915 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
6916 set. Since we are defining a symbol, ensure one
6918 if ((s->flags & BSF_LOCAL) == 0)
6919 s->flags |= BSF_GLOBAL;
6920 s->flags |= BSF_SYNTHETIC;
6921 /* This is no longer a section symbol. */
6922 s->flags &= ~BSF_SECTION_SYM;
6924 s->the_bfd = plt->owner;
6928 len = strlen ((*p->sym_ptr_ptr)->name);
6929 memcpy (names, (*p->sym_ptr_ptr)->name, len);
6935 memcpy (names, "+0x", sizeof ("+0x") - 1);
6936 names += sizeof ("+0x") - 1;
6937 bfd_sprintf_vma (abfd, buf, p->addend);
6938 for (a = buf; *a == '0'; ++a)
6941 memcpy (names, a, size);
6944 memcpy (names, "@plt", sizeof ("@plt"));
6945 names += sizeof ("@plt");
6949 offset += plt_entry_size;
6953 /* PLT entries with R_X86_64_TLSDESC relocations are skipped. */
6959 for (j = 0; plts[j].name != NULL; j++)
6960 if (plts[j].contents != NULL)
6961 free (plts[j].contents);
6968 /* Handle an x86-64 specific section when reading an object file. This
6969 is called when elfcode.h finds a section with an unknown type. */
6972 elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
6973 const char *name, int shindex)
6975 if (hdr->sh_type != SHT_X86_64_UNWIND)
6978 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6984 /* Hook called by the linker routine which adds symbols from an object
6985 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
6989 elf_x86_64_add_symbol_hook (bfd *abfd,
6990 struct bfd_link_info *info ATTRIBUTE_UNUSED,
6991 Elf_Internal_Sym *sym,
6992 const char **namep ATTRIBUTE_UNUSED,
6993 flagword *flagsp ATTRIBUTE_UNUSED,
6999 switch (sym->st_shndx)
7001 case SHN_X86_64_LCOMMON:
7002 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
7005 lcomm = bfd_make_section_with_flags (abfd,
7009 | SEC_LINKER_CREATED));
7012 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
7015 *valp = sym->st_size;
7023 /* Given a BFD section, try to locate the corresponding ELF section
7027 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
7028 asection *sec, int *index_return)
7030 if (sec == &_bfd_elf_large_com_section)
7032 *index_return = SHN_X86_64_LCOMMON;
7038 /* Process a symbol. */
7041 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
7044 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
7046 switch (elfsym->internal_elf_sym.st_shndx)
7048 case SHN_X86_64_LCOMMON:
7049 asym->section = &_bfd_elf_large_com_section;
7050 asym->value = elfsym->internal_elf_sym.st_size;
7051 /* Common symbol doesn't set BSF_GLOBAL. */
7052 asym->flags &= ~BSF_GLOBAL;
7058 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
7060 return (sym->st_shndx == SHN_COMMON
7061 || sym->st_shndx == SHN_X86_64_LCOMMON);
7065 elf_x86_64_common_section_index (asection *sec)
7067 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
7070 return SHN_X86_64_LCOMMON;
7074 elf_x86_64_common_section (asection *sec)
7076 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
7077 return bfd_com_section_ptr;
7079 return &_bfd_elf_large_com_section;
7083 elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
7084 const Elf_Internal_Sym *sym,
7089 const asection *oldsec)
7091 /* A normal common symbol and a large common symbol result in a
7092 normal common symbol. We turn the large common symbol into a
7095 && h->root.type == bfd_link_hash_common
7097 && bfd_is_com_section (*psec)
7100 if (sym->st_shndx == SHN_COMMON
7101 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
7103 h->root.u.c.p->section
7104 = bfd_make_section_old_way (oldbfd, "COMMON");
7105 h->root.u.c.p->section->flags = SEC_ALLOC;
7107 else if (sym->st_shndx == SHN_X86_64_LCOMMON
7108 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
7109 *psec = bfd_com_section_ptr;
7116 elf_x86_64_additional_program_headers (bfd *abfd,
7117 struct bfd_link_info *info ATTRIBUTE_UNUSED)
7122 /* Check to see if we need a large readonly segment. */
7123 s = bfd_get_section_by_name (abfd, ".lrodata");
7124 if (s && (s->flags & SEC_LOAD))
7127 /* Check to see if we need a large data segment. Since .lbss sections
7128 is placed right after the .bss section, there should be no need for
7129 a large data segment just because of .lbss. */
7130 s = bfd_get_section_by_name (abfd, ".ldata");
7131 if (s && (s->flags & SEC_LOAD))
7137 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
7140 elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
7142 if (h->plt.offset != (bfd_vma) -1
7144 && !h->pointer_equality_needed)
7147 return _bfd_elf_hash_symbol (h);
7150 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
7153 elf_x86_64_relocs_compatible (const bfd_target *input,
7154 const bfd_target *output)
7156 return ((xvec_get_elf_backend_data (input)->s->elfclass
7157 == xvec_get_elf_backend_data (output)->s->elfclass)
7158 && _bfd_elf_relocs_compatible (input, output));
7161 /* Parse x86-64 GNU properties. */
7163 static enum elf_property_kind
7164 elf_x86_64_parse_gnu_properties (bfd *abfd, unsigned int type,
7165 bfd_byte *ptr, unsigned int datasz)
7171 case GNU_PROPERTY_X86_ISA_1_USED:
7172 case GNU_PROPERTY_X86_ISA_1_NEEDED:
7173 case GNU_PROPERTY_X86_FEATURE_1_AND:
7177 ((type == GNU_PROPERTY_X86_ISA_1_USED
7178 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
7179 : (type == GNU_PROPERTY_X86_ISA_1_NEEDED
7180 ? _("error: %B: <corrupt x86 ISA needed size: 0x%x>")
7181 : _("error: %B: <corrupt x86 feature size: 0x%x>"))),
7183 return property_corrupt;
7185 prop = _bfd_elf_get_property (abfd, type, datasz);
7186 /* Combine properties of the same type. */
7187 prop->u.number |= bfd_h_get_32 (abfd, ptr);
7188 prop->pr_kind = property_number;
7192 return property_ignored;
7195 return property_number;
7198 /* Merge x86-64 GNU property BPROP with APROP. If APROP isn't NULL,
7199 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
7200 should be merged with ABFD. */
7203 elf_x86_64_merge_gnu_properties (struct bfd_link_info *info,
7204 bfd *abfd ATTRIBUTE_UNUSED,
7205 elf_property *aprop,
7206 elf_property *bprop)
7208 unsigned int number, features;
7209 bfd_boolean updated = FALSE;
7210 unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type;
7214 case GNU_PROPERTY_X86_ISA_1_USED:
7215 case GNU_PROPERTY_X86_ISA_1_NEEDED:
7216 if (aprop != NULL && bprop != NULL)
7218 number = aprop->u.number;
7219 aprop->u.number = number | bprop->u.number;
7220 updated = number != (unsigned int) aprop->u.number;
7224 /* Return TRUE if APROP is NULL to indicate that BPROP should
7225 be added to ABFD. */
7226 updated = aprop == NULL;
7230 case GNU_PROPERTY_X86_FEATURE_1_AND:
7231 /* Only one of APROP and BPROP can be NULL:
7232 1. APROP & BPROP when both APROP and BPROP aren't NULL.
7233 2. If APROP is NULL, remove x86 feature.
7234 3. Otherwise, do nothing.
7236 if (aprop != NULL && bprop != NULL)
7240 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7242 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
7243 number = aprop->u.number;
7244 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
7245 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7246 aprop->u.number = (number & bprop->u.number) | features;
7247 updated = number != (unsigned int) aprop->u.number;
7248 /* Remove the property if all feature bits are cleared. */
7249 if (aprop->u.number == 0)
7250 aprop->pr_kind = property_remove;
7256 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7258 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
7261 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
7262 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7265 number = aprop->u.number;
7266 aprop->u.number = number | features;
7267 updated = number != (unsigned int) aprop->u.number;
7271 bprop->u.number |= features;
7275 else if (aprop != NULL)
7277 aprop->pr_kind = property_remove;
7284 /* Never should happen. */
7291 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
7292 with GNU properties if found. Otherwise, return NULL. */
7295 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info)
7297 bfd_boolean normal_target;
7298 bfd_boolean lazy_plt;
7299 asection *sec, *pltsec;
7301 bfd_boolean use_ibt_plt;
7302 unsigned int plt_alignment, features;
7303 struct elf_x86_64_link_hash_table *htab;
7310 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
7312 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
7314 /* Find a normal input file with GNU property note. */
7315 for (pbfd = info->input_bfds;
7317 pbfd = pbfd->link.next)
7318 if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour
7319 && bfd_count_sections (pbfd) != 0)
7323 if (elf_properties (pbfd) != NULL)
7331 /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and
7332 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
7333 prop = _bfd_elf_get_property (ebfd,
7334 GNU_PROPERTY_X86_FEATURE_1_AND,
7336 prop->u.number |= features;
7337 prop->pr_kind = property_number;
7339 /* Create the GNU property note section if needed. */
7342 sec = bfd_make_section_with_flags (ebfd,
7343 NOTE_GNU_PROPERTY_SECTION_NAME,
7351 info->callbacks->einfo (_("%F: failed to create GNU property section\n"));
7353 if (!bfd_set_section_alignment (ebfd, sec,
7354 ABI_64_P (ebfd) ? 3 : 2))
7357 info->callbacks->einfo (_("%F%A: failed to align section\n"),
7361 elf_section_type (sec) = SHT_NOTE;
7365 /* Check GNU_PROPERTY_NO_COPY_ON_PROTECTED. */
7366 for (; pbfd != NULL; pbfd = pbfd->link.next)
7367 if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour
7369 & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
7371 elf_property_list *p;
7373 /* The property list is sorted in order of type. */
7374 for (p = elf_properties (pbfd); p != NULL; p = p->next)
7376 if (GNU_PROPERTY_NO_COPY_ON_PROTECTED
7377 == p->property.pr_type)
7379 /* Clear extern_protected_data if
7380 GNU_PROPERTY_NO_COPY_ON_PROTECTED is
7381 set on any input relocatable file. */
7382 info->extern_protected_data = FALSE;
7385 else if (GNU_PROPERTY_NO_COPY_ON_PROTECTED
7386 < p->property.pr_type)
7392 pbfd = _bfd_elf_link_setup_gnu_properties (info);
7394 if (bfd_link_relocatable (info))
7397 htab = elf_x86_64_hash_table (info);
7401 use_ibt_plt = info->ibtplt || info->ibt;
7402 if (!use_ibt_plt && pbfd != NULL)
7404 /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */
7405 elf_property_list *p;
7407 /* The property list is sorted in order of type. */
7408 for (p = elf_properties (pbfd); p; p = p->next)
7410 if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type)
7412 use_ibt_plt = !!(p->property.u.number
7413 & GNU_PROPERTY_X86_FEATURE_1_IBT);
7416 else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type)
7421 dynobj = htab->elf.dynobj;
7423 /* Set htab->elf.dynobj here so that there is no need to check and
7424 set it in check_relocs. */
7429 htab->elf.dynobj = pbfd;
7436 /* Find a normal input file to hold linker created
7438 for (abfd = info->input_bfds;
7440 abfd = abfd->link.next)
7441 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
7443 & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
7445 htab->elf.dynobj = abfd;
7452 /* Even when lazy binding is disabled by "-z now", the PLT0 entry may
7453 still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
7454 canonical function address. */
7455 htab->plt.has_plt0 = 1;
7457 if (get_elf_x86_64_backend_data (info->output_bfd)->os
7462 if (ABI_64_P (dynobj))
7464 htab->lazy_plt = &elf_x86_64_lazy_ibt_plt;
7465 htab->non_lazy_plt = &elf_x86_64_non_lazy_ibt_plt;
7469 htab->lazy_plt = &elf_x32_lazy_ibt_plt;
7470 htab->non_lazy_plt = &elf_x32_non_lazy_ibt_plt;
7473 else if (info->bndplt)
7475 htab->lazy_plt = &elf_x86_64_lazy_bnd_plt;
7476 htab->non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt;
7480 htab->lazy_plt = &elf_x86_64_lazy_plt;
7481 htab->non_lazy_plt = &elf_x86_64_non_lazy_plt;
7483 normal_target = TRUE;
7487 htab->lazy_plt = &elf_x86_64_nacl_plt;
7488 htab->non_lazy_plt = NULL;
7489 normal_target = FALSE;
7492 pltsec = htab->elf.splt;
7494 /* If the non-lazy PLT is available, use it for all PLT entries if
7495 there are no PLT0 or no .plt section. */
7496 if (htab->non_lazy_plt != NULL
7497 && (!htab->plt.has_plt0 || pltsec == NULL))
7501 = htab->non_lazy_plt->plt_entry;
7502 htab->plt.plt_entry_size
7503 = htab->non_lazy_plt->plt_entry_size;
7504 htab->plt.plt_got_offset
7505 = htab->non_lazy_plt->plt_got_offset;
7506 htab->plt.plt_got_insn_size
7507 = htab->non_lazy_plt->plt_got_insn_size;
7508 htab->plt.eh_frame_plt_size
7509 = htab->non_lazy_plt->eh_frame_plt_size;
7510 htab->plt.eh_frame_plt
7511 = htab->non_lazy_plt->eh_frame_plt;
7517 = htab->lazy_plt->plt_entry;
7518 htab->plt.plt_entry_size
7519 = htab->lazy_plt->plt_entry_size;
7520 htab->plt.plt_got_offset
7521 = htab->lazy_plt->plt_got_offset;
7522 htab->plt.plt_got_insn_size
7523 = htab->lazy_plt->plt_got_insn_size;
7524 htab->plt.eh_frame_plt_size
7525 = htab->lazy_plt->eh_frame_plt_size;
7526 htab->plt.eh_frame_plt
7527 = htab->lazy_plt->eh_frame_plt;
7530 /* Return if there are no normal input files. */
7534 /* Since create_dynamic_sections isn't always called, but GOT
7535 relocations need GOT relocations, create them here so that we
7536 don't need to do it in check_relocs. */
7537 if (htab->elf.sgot == NULL
7538 && !_bfd_elf_create_got_section (dynobj, info))
7539 info->callbacks->einfo (_("%F: failed to create GOT sections\n"));
7541 /* Align .got and .got.plt sections to their entry size. Do it here
7542 instead of in create_dynamic_sections so that they are always
7543 properly aligned even if create_dynamic_sections isn't called. */
7544 sec = htab->elf.sgot;
7545 if (!bfd_set_section_alignment (dynobj, sec, 3))
7546 goto error_alignment;
7548 sec = htab->elf.sgotplt;
7549 if (!bfd_set_section_alignment (dynobj, sec, 3))
7550 goto error_alignment;
7552 /* Create the ifunc sections here so that check_relocs can be
7554 if (!_bfd_elf_create_ifunc_sections (dynobj, info))
7555 info->callbacks->einfo (_("%F: failed to create ifunc sections\n"));
7557 plt_alignment = bfd_log2 (htab->plt.plt_entry_size);
7561 /* Whe creating executable, set the contents of the .interp
7562 section to the interpreter. */
7563 if (bfd_link_executable (info) && !info->nointerp)
7565 asection *s = bfd_get_linker_section (dynobj, ".interp");
7568 s->size = htab->dynamic_interpreter_size;
7569 s->contents = (unsigned char *) htab->dynamic_interpreter;
7573 /* Don't change PLT section alignment for NaCl since it uses
7574 64-byte PLT entry and sets PLT section alignment to 32
7575 bytes. Don't create additional PLT sections for NaCl. */
7578 const struct elf_backend_data *bed
7579 = get_elf_backend_data (dynobj);
7580 flagword pltflags = (bed->dynamic_sec_flags
7585 unsigned int non_lazy_plt_alignment
7586 = bfd_log2 (htab->non_lazy_plt->plt_entry_size);
7589 if (!bfd_set_section_alignment (sec->owner, sec,
7591 goto error_alignment;
7593 /* Create the GOT procedure linkage table. */
7594 sec = bfd_make_section_anyway_with_flags (dynobj,
7598 info->callbacks->einfo (_("%F: failed to create GOT PLT section\n"));
7600 if (!bfd_set_section_alignment (dynobj, sec,
7601 non_lazy_plt_alignment))
7602 goto error_alignment;
7604 htab->plt_got = sec;
7612 /* Create the second PLT for Intel IBT support. IBT
7613 PLT is supported only for non-NaCl target and is
7614 is needed only for lazy binding. */
7615 sec = bfd_make_section_anyway_with_flags (dynobj,
7619 info->callbacks->einfo (_("%F: failed to create IBT-enabled PLT section\n"));
7621 if (!bfd_set_section_alignment (dynobj, sec,
7623 goto error_alignment;
7625 else if (info->bndplt && ABI_64_P (dynobj))
7627 /* Create the second PLT for Intel MPX support. MPX
7628 PLT is supported only for non-NaCl target in 64-bit
7629 mode and is needed only for lazy binding. */
7630 sec = bfd_make_section_anyway_with_flags (dynobj,
7634 info->callbacks->einfo (_("%F: failed to create BND PLT section\n"));
7636 if (!bfd_set_section_alignment (dynobj, sec,
7637 non_lazy_plt_alignment))
7638 goto error_alignment;
7641 htab->plt_second = sec;
7645 if (!info->no_ld_generated_unwind_info)
7647 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
7648 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
7649 | SEC_LINKER_CREATED);
7651 sec = bfd_make_section_anyway_with_flags (dynobj,
7655 info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n"));
7657 if (!bfd_set_section_alignment (dynobj, sec,
7658 ABI_64_P (dynobj) ? 3 : 2))
7659 goto error_alignment;
7661 htab->plt_eh_frame = sec;
7663 if (htab->plt_got != NULL)
7665 sec = bfd_make_section_anyway_with_flags (dynobj,
7669 info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n"));
7671 if (!bfd_set_section_alignment (dynobj, sec,
7672 ABI_64_P (dynobj) ? 3 : 2))
7673 goto error_alignment;
7675 htab->plt_got_eh_frame = sec;
7678 if (htab->plt_second != NULL)
7680 sec = bfd_make_section_anyway_with_flags (dynobj,
7684 info->callbacks->einfo (_("%F: failed to create BND PLT .eh_frame section\n"));
7686 if (!bfd_set_section_alignment (dynobj, sec, 3))
7687 goto error_alignment;
7689 htab->plt_second_eh_frame = sec;
7696 /* The .iplt section is used for IFUNC symbols in static
7698 sec = htab->elf.iplt;
7700 && !bfd_set_section_alignment (sec->owner, sec,
7702 goto error_alignment;
7709 elf_x86_64_link_check_relocs (bfd *abfd, struct bfd_link_info *info)
7711 if (!bfd_link_relocatable (info))
7713 /* Check for __tls_get_addr reference. */
7714 struct elf_link_hash_entry *h;
7715 h = elf_link_hash_lookup (elf_hash_table (info), "__tls_get_addr",
7716 FALSE, FALSE, FALSE);
7718 ((struct elf_x86_64_link_hash_entry *) h)->tls_get_addr = 1;
7721 /* Invoke the regular ELF backend linker to do all the work. */
7722 return _bfd_elf_link_check_relocs (abfd, info);
7725 static const struct bfd_elf_special_section
7726 elf_x86_64_special_sections[]=
7728 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7729 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
7730 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
7731 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7732 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
7733 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
7734 { NULL, 0, 0, 0, 0 }
7737 #define TARGET_LITTLE_SYM x86_64_elf64_vec
7738 #define TARGET_LITTLE_NAME "elf64-x86-64"
7739 #define ELF_ARCH bfd_arch_i386
7740 #define ELF_TARGET_ID X86_64_ELF_DATA
7741 #define ELF_MACHINE_CODE EM_X86_64
7742 #define ELF_MAXPAGESIZE 0x200000
7743 #define ELF_MINPAGESIZE 0x1000
7744 #define ELF_COMMONPAGESIZE 0x1000
7746 #define elf_backend_can_gc_sections 1
7747 #define elf_backend_can_refcount 1
7748 #define elf_backend_want_got_plt 1
7749 #define elf_backend_plt_readonly 1
7750 #define elf_backend_want_plt_sym 0
7751 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
7752 #define elf_backend_rela_normal 1
7753 #define elf_backend_plt_alignment 4
7754 #define elf_backend_extern_protected_data 1
7755 #define elf_backend_caches_rawsize 1
7756 #define elf_backend_dtrel_excludes_plt 1
7757 #define elf_backend_want_dynrelro 1
7759 #define elf_info_to_howto elf_x86_64_info_to_howto
7761 #define bfd_elf64_bfd_link_hash_table_create \
7762 elf_x86_64_link_hash_table_create
7763 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
7764 #define bfd_elf64_bfd_reloc_name_lookup \
7765 elf_x86_64_reloc_name_lookup
7767 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
7768 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
7769 #define elf_backend_check_relocs elf_x86_64_check_relocs
7770 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
7771 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
7772 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
7773 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
7774 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
7775 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
7776 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
7777 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
7779 #define elf_backend_write_core_note elf_x86_64_write_core_note
7781 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
7782 #define elf_backend_relocate_section elf_x86_64_relocate_section
7783 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
7784 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
7785 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
7786 #define elf_backend_object_p elf64_x86_64_elf_object_p
7787 #define bfd_elf64_mkobject elf_x86_64_mkobject
7788 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
7789 #define bfd_elf64_bfd_link_check_relocs elf_x86_64_link_check_relocs
7791 #define elf_backend_section_from_shdr \
7792 elf_x86_64_section_from_shdr
7794 #define elf_backend_section_from_bfd_section \
7795 elf_x86_64_elf_section_from_bfd_section
7796 #define elf_backend_add_symbol_hook \
7797 elf_x86_64_add_symbol_hook
7798 #define elf_backend_symbol_processing \
7799 elf_x86_64_symbol_processing
7800 #define elf_backend_common_section_index \
7801 elf_x86_64_common_section_index
7802 #define elf_backend_common_section \
7803 elf_x86_64_common_section
7804 #define elf_backend_common_definition \
7805 elf_x86_64_common_definition
7806 #define elf_backend_merge_symbol \
7807 elf_x86_64_merge_symbol
7808 #define elf_backend_special_sections \
7809 elf_x86_64_special_sections
7810 #define elf_backend_additional_program_headers \
7811 elf_x86_64_additional_program_headers
7812 #define elf_backend_hash_symbol \
7813 elf_x86_64_hash_symbol
7814 #define elf_backend_omit_section_dynsym \
7815 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
7816 #define elf_backend_fixup_symbol \
7817 elf_x86_64_fixup_symbol
7818 #define elf_backend_parse_gnu_properties \
7819 elf_x86_64_parse_gnu_properties
7820 #define elf_backend_merge_gnu_properties \
7821 elf_x86_64_merge_gnu_properties
7822 #define elf_backend_setup_gnu_properties \
7823 elf_x86_64_link_setup_gnu_properties
7825 #include "elf64-target.h"
7827 /* CloudABI support. */
7829 #undef TARGET_LITTLE_SYM
7830 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
7831 #undef TARGET_LITTLE_NAME
7832 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
7835 #define ELF_OSABI ELFOSABI_CLOUDABI
7838 #define elf64_bed elf64_x86_64_cloudabi_bed
7840 #include "elf64-target.h"
7842 /* FreeBSD support. */
7844 #undef TARGET_LITTLE_SYM
7845 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
7846 #undef TARGET_LITTLE_NAME
7847 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
7850 #define ELF_OSABI ELFOSABI_FREEBSD
7853 #define elf64_bed elf64_x86_64_fbsd_bed
7855 #include "elf64-target.h"
7857 /* Solaris 2 support. */
7859 #undef TARGET_LITTLE_SYM
7860 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
7861 #undef TARGET_LITTLE_NAME
7862 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
7864 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
7865 objects won't be recognized. */
7869 #define elf64_bed elf64_x86_64_sol2_bed
7871 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
7873 #undef elf_backend_static_tls_alignment
7874 #define elf_backend_static_tls_alignment 16
7876 /* The Solaris 2 ABI requires a plt symbol on all platforms.
7878 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
7880 #undef elf_backend_want_plt_sym
7881 #define elf_backend_want_plt_sym 1
7883 #undef elf_backend_strtab_flags
7884 #define elf_backend_strtab_flags SHF_STRINGS
7887 elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
7888 bfd *obfd ATTRIBUTE_UNUSED,
7889 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
7890 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
7892 /* PR 19938: FIXME: Need to add code for setting the sh_info
7893 and sh_link fields of Solaris specific section types. */
7897 #undef elf_backend_copy_special_section_fields
7898 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
7900 #include "elf64-target.h"
7902 /* Native Client support. */
7905 elf64_x86_64_nacl_elf_object_p (bfd *abfd)
7907 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
7908 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
7912 #undef TARGET_LITTLE_SYM
7913 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
7914 #undef TARGET_LITTLE_NAME
7915 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
7917 #define elf64_bed elf64_x86_64_nacl_bed
7919 #undef ELF_MAXPAGESIZE
7920 #undef ELF_MINPAGESIZE
7921 #undef ELF_COMMONPAGESIZE
7922 #define ELF_MAXPAGESIZE 0x10000
7923 #define ELF_MINPAGESIZE 0x10000
7924 #define ELF_COMMONPAGESIZE 0x10000
7926 /* Restore defaults. */
7928 #undef elf_backend_static_tls_alignment
7929 #undef elf_backend_want_plt_sym
7930 #define elf_backend_want_plt_sym 0
7931 #undef elf_backend_strtab_flags
7932 #undef elf_backend_copy_special_section_fields
7934 /* NaCl uses substantially different PLT entries for the same effects. */
7936 #undef elf_backend_plt_alignment
7937 #define elf_backend_plt_alignment 5
7938 #define NACL_PLT_ENTRY_SIZE 64
7939 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
7941 static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
7943 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
7944 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
7945 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
7946 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
7947 0x41, 0xff, 0xe3, /* jmpq *%r11 */
7949 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
7950 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
7952 /* 32 bytes of nop to pad out to the standard size. */
7953 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7954 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7955 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7956 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7957 0x66, /* excess data16 prefix */
7961 static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
7963 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
7964 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
7965 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
7966 0x41, 0xff, 0xe3, /* jmpq *%r11 */
7968 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
7969 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7970 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7972 /* Lazy GOT entries point here (32-byte aligned). */
7973 0x68, /* pushq immediate */
7974 0, 0, 0, 0, /* replaced with index into relocation table. */
7975 0xe9, /* jmp relative */
7976 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
7978 /* 22 bytes of nop to pad out to the standard size. */
7979 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
7980 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
7981 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
7984 /* .eh_frame covering the .plt section. */
7986 static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
7988 #if (PLT_CIE_LENGTH != 20 \
7989 || PLT_FDE_LENGTH != 36 \
7990 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
7991 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
7992 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
7994 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
7995 0, 0, 0, 0, /* CIE ID */
7996 1, /* CIE version */
7997 'z', 'R', 0, /* Augmentation string */
7998 1, /* Code alignment factor */
7999 0x78, /* Data alignment factor */
8000 16, /* Return address column */
8001 1, /* Augmentation size */
8002 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
8003 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
8004 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
8005 DW_CFA_nop, DW_CFA_nop,
8007 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
8008 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
8009 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
8010 0, 0, 0, 0, /* .plt size goes here */
8011 0, /* Augmentation size */
8012 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
8013 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
8014 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
8015 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
8016 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
8017 13, /* Block length */
8018 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
8019 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
8020 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
8021 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
8022 DW_CFA_nop, DW_CFA_nop
8025 static const struct elf_x86_64_lazy_plt_layout elf_x86_64_nacl_plt =
8027 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
8028 elf_x86_64_nacl_plt_entry, /* plt_entry */
8029 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
8030 2, /* plt0_got1_offset */
8031 9, /* plt0_got2_offset */
8032 13, /* plt0_got2_insn_end */
8033 3, /* plt_got_offset */
8034 33, /* plt_reloc_offset */
8035 38, /* plt_plt_offset */
8036 7, /* plt_got_insn_size */
8037 42, /* plt_plt_insn_end */
8038 32, /* plt_lazy_offset */
8039 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
8040 sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */
8043 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
8048 #undef elf_backend_arch_data
8049 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
8051 #undef elf_backend_object_p
8052 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
8053 #undef elf_backend_modify_segment_map
8054 #define elf_backend_modify_segment_map nacl_modify_segment_map
8055 #undef elf_backend_modify_program_headers
8056 #define elf_backend_modify_program_headers nacl_modify_program_headers
8057 #undef elf_backend_final_write_processing
8058 #define elf_backend_final_write_processing nacl_final_write_processing
8060 #include "elf64-target.h"
8062 /* Native Client x32 support. */
8065 elf32_x86_64_nacl_elf_object_p (bfd *abfd)
8067 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
8068 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
8072 #undef TARGET_LITTLE_SYM
8073 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
8074 #undef TARGET_LITTLE_NAME
8075 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
8077 #define elf32_bed elf32_x86_64_nacl_bed
8079 #define bfd_elf32_bfd_link_hash_table_create \
8080 elf_x86_64_link_hash_table_create
8081 #define bfd_elf32_bfd_reloc_type_lookup \
8082 elf_x86_64_reloc_type_lookup
8083 #define bfd_elf32_bfd_reloc_name_lookup \
8084 elf_x86_64_reloc_name_lookup
8085 #define bfd_elf32_mkobject \
8087 #define bfd_elf32_get_synthetic_symtab \
8088 elf_x86_64_get_synthetic_symtab
8089 #define bfd_elf32_bfd_link_check_relocs \
8090 elf_x86_64_link_check_relocs
8092 #undef elf_backend_object_p
8093 #define elf_backend_object_p \
8094 elf32_x86_64_nacl_elf_object_p
8096 #undef elf_backend_bfd_from_remote_memory
8097 #define elf_backend_bfd_from_remote_memory \
8098 _bfd_elf32_bfd_from_remote_memory
8100 #undef elf_backend_size_info
8101 #define elf_backend_size_info \
8102 _bfd_elf32_size_info
8104 #include "elf32-target.h"
8106 /* Restore defaults. */
8107 #undef elf_backend_object_p
8108 #define elf_backend_object_p elf64_x86_64_elf_object_p
8109 #undef elf_backend_bfd_from_remote_memory
8110 #undef elf_backend_size_info
8111 #undef elf_backend_modify_segment_map
8112 #undef elf_backend_modify_program_headers
8113 #undef elf_backend_final_write_processing
8115 /* Intel L1OM support. */
8118 elf64_l1om_elf_object_p (bfd *abfd)
8120 /* Set the right machine number for an L1OM elf64 file. */
8121 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
8125 #undef TARGET_LITTLE_SYM
8126 #define TARGET_LITTLE_SYM l1om_elf64_vec
8127 #undef TARGET_LITTLE_NAME
8128 #define TARGET_LITTLE_NAME "elf64-l1om"
8130 #define ELF_ARCH bfd_arch_l1om
8132 #undef ELF_MACHINE_CODE
8133 #define ELF_MACHINE_CODE EM_L1OM
8138 #define elf64_bed elf64_l1om_bed
8140 #undef elf_backend_object_p
8141 #define elf_backend_object_p elf64_l1om_elf_object_p
8143 /* Restore defaults. */
8144 #undef ELF_MAXPAGESIZE
8145 #undef ELF_MINPAGESIZE
8146 #undef ELF_COMMONPAGESIZE
8147 #define ELF_MAXPAGESIZE 0x200000
8148 #define ELF_MINPAGESIZE 0x1000
8149 #define ELF_COMMONPAGESIZE 0x1000
8150 #undef elf_backend_plt_alignment
8151 #define elf_backend_plt_alignment 4
8152 #undef elf_backend_arch_data
8153 #define elf_backend_arch_data &elf_x86_64_arch_bed
8155 #include "elf64-target.h"
8157 /* FreeBSD L1OM support. */
8159 #undef TARGET_LITTLE_SYM
8160 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
8161 #undef TARGET_LITTLE_NAME
8162 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
8165 #define ELF_OSABI ELFOSABI_FREEBSD
8168 #define elf64_bed elf64_l1om_fbsd_bed
8170 #include "elf64-target.h"
8172 /* Intel K1OM support. */
8175 elf64_k1om_elf_object_p (bfd *abfd)
8177 /* Set the right machine number for an K1OM elf64 file. */
8178 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
8182 #undef TARGET_LITTLE_SYM
8183 #define TARGET_LITTLE_SYM k1om_elf64_vec
8184 #undef TARGET_LITTLE_NAME
8185 #define TARGET_LITTLE_NAME "elf64-k1om"
8187 #define ELF_ARCH bfd_arch_k1om
8189 #undef ELF_MACHINE_CODE
8190 #define ELF_MACHINE_CODE EM_K1OM
8195 #define elf64_bed elf64_k1om_bed
8197 #undef elf_backend_object_p
8198 #define elf_backend_object_p elf64_k1om_elf_object_p
8200 #undef elf_backend_static_tls_alignment
8202 #undef elf_backend_want_plt_sym
8203 #define elf_backend_want_plt_sym 0
8205 #include "elf64-target.h"
8207 /* FreeBSD K1OM support. */
8209 #undef TARGET_LITTLE_SYM
8210 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
8211 #undef TARGET_LITTLE_NAME
8212 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
8215 #define ELF_OSABI ELFOSABI_FREEBSD
8218 #define elf64_bed elf64_k1om_fbsd_bed
8220 #include "elf64-target.h"
8222 /* 32bit x86-64 support. */
8224 #undef TARGET_LITTLE_SYM
8225 #define TARGET_LITTLE_SYM x86_64_elf32_vec
8226 #undef TARGET_LITTLE_NAME
8227 #define TARGET_LITTLE_NAME "elf32-x86-64"
8231 #define ELF_ARCH bfd_arch_i386
8233 #undef ELF_MACHINE_CODE
8234 #define ELF_MACHINE_CODE EM_X86_64
8238 #undef elf_backend_object_p
8239 #define elf_backend_object_p \
8240 elf32_x86_64_elf_object_p
8242 #undef elf_backend_bfd_from_remote_memory
8243 #define elf_backend_bfd_from_remote_memory \
8244 _bfd_elf32_bfd_from_remote_memory
8246 #undef elf_backend_size_info
8247 #define elf_backend_size_info \
8248 _bfd_elf32_size_info
8250 #include "elf32-target.h"