1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
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 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
290 r_type = R_X86_64_NONE;
295 i = r_type - (unsigned int) R_X86_64_vt_offset;
296 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
297 return &x86_64_elf_howto_table[i];
300 /* Given a BFD reloc type, return a HOWTO structure. */
301 static reloc_howto_type *
302 elf_x86_64_reloc_type_lookup (bfd *abfd,
303 bfd_reloc_code_real_type code)
307 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
310 if (x86_64_reloc_map[i].bfd_reloc_val == code)
311 return elf_x86_64_rtype_to_howto (abfd,
312 x86_64_reloc_map[i].elf_reloc_val);
317 static reloc_howto_type *
318 elf_x86_64_reloc_name_lookup (bfd *abfd,
323 if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
325 /* Get x32 R_X86_64_32. */
326 reloc_howto_type *reloc
327 = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
328 BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
332 for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
333 if (x86_64_elf_howto_table[i].name != NULL
334 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
335 return &x86_64_elf_howto_table[i];
340 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
343 elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
344 Elf_Internal_Rela *dst)
348 r_type = ELF32_R_TYPE (dst->r_info);
349 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
350 BFD_ASSERT (r_type == cache_ptr->howto->type);
353 /* Support for core dump NOTE sections. */
355 elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
360 switch (note->descsz)
365 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
367 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
370 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
378 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
380 elf_tdata (abfd)->core->signal
381 = bfd_get_16 (abfd, note->descdata + 12);
384 elf_tdata (abfd)->core->lwpid
385 = bfd_get_32 (abfd, note->descdata + 32);
394 /* Make a ".reg/999" section. */
395 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
396 size, note->descpos + offset);
400 elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
402 switch (note->descsz)
407 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
408 elf_tdata (abfd)->core->pid
409 = bfd_get_32 (abfd, note->descdata + 12);
410 elf_tdata (abfd)->core->program
411 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
412 elf_tdata (abfd)->core->command
413 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
416 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
417 elf_tdata (abfd)->core->pid
418 = bfd_get_32 (abfd, note->descdata + 24);
419 elf_tdata (abfd)->core->program
420 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
421 elf_tdata (abfd)->core->command
422 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
425 /* Note that for some reason, a spurious space is tacked
426 onto the end of the args in some (at least one anyway)
427 implementations, so strip it off if it exists. */
430 char *command = elf_tdata (abfd)->core->command;
431 int n = strlen (command);
433 if (0 < n && command[n - 1] == ' ')
434 command[n - 1] = '\0';
442 elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
445 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
447 const char *fname, *psargs;
458 va_start (ap, note_type);
459 fname = va_arg (ap, const char *);
460 psargs = va_arg (ap, const char *);
463 if (bed->s->elfclass == ELFCLASS32)
466 memset (&data, 0, sizeof (data));
467 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
468 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
469 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
470 &data, sizeof (data));
475 memset (&data, 0, sizeof (data));
476 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
477 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
478 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
479 &data, sizeof (data));
484 va_start (ap, note_type);
485 pid = va_arg (ap, long);
486 cursig = va_arg (ap, int);
487 gregs = va_arg (ap, const void *);
490 if (bed->s->elfclass == ELFCLASS32)
492 if (bed->elf_machine_code == EM_X86_64)
494 prstatusx32_t prstat;
495 memset (&prstat, 0, sizeof (prstat));
497 prstat.pr_cursig = cursig;
498 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
499 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
500 &prstat, sizeof (prstat));
505 memset (&prstat, 0, sizeof (prstat));
507 prstat.pr_cursig = cursig;
508 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
509 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
510 &prstat, sizeof (prstat));
516 memset (&prstat, 0, sizeof (prstat));
518 prstat.pr_cursig = cursig;
519 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
520 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
521 &prstat, sizeof (prstat));
528 /* Functions for the x86-64 ELF linker. */
530 /* The name of the dynamic interpreter. This is put in the .interp
533 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
534 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
536 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
537 copying dynamic variables from a shared lib into an app's dynbss
538 section, and instead use a dynamic relocation to point into the
540 #define ELIMINATE_COPY_RELOCS 1
542 /* The size in bytes of an entry in the global offset table. */
544 #define GOT_ENTRY_SIZE 8
546 /* The size in bytes of an entry in the procedure linkage table. */
548 #define PLT_ENTRY_SIZE 16
550 /* The first entry in a procedure linkage table looks like this. See the
551 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
553 static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
555 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
556 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
557 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
560 /* Subsequent entries in a procedure linkage table look like this. */
562 static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
564 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
565 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
566 0x68, /* pushq immediate */
567 0, 0, 0, 0, /* replaced with index into relocation table. */
568 0xe9, /* jmp relative */
569 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
572 /* The first entry in a procedure linkage table with BND relocations
575 static const bfd_byte elf_x86_64_bnd_plt0_entry[PLT_ENTRY_SIZE] =
577 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
578 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
579 0x0f, 0x1f, 0 /* nopl (%rax) */
582 /* Subsequent entries for legacy branches in a procedure linkage table
583 with BND relocations look like this. */
585 static const bfd_byte elf_x86_64_legacy_plt_entry[PLT_ENTRY_SIZE] =
587 0x68, 0, 0, 0, 0, /* pushq immediate */
588 0xe9, 0, 0, 0, 0, /* jmpq relative */
589 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */
592 /* Subsequent entries for branches with BND prefx in a procedure linkage
593 table with BND relocations look like this. */
595 static const bfd_byte elf_x86_64_bnd_plt_entry[PLT_ENTRY_SIZE] =
597 0x68, 0, 0, 0, 0, /* pushq immediate */
598 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
599 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
602 /* Entries for legacy branches in the second procedure linkage table
605 static const bfd_byte elf_x86_64_legacy_plt2_entry[8] =
607 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
608 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
612 /* Entries for branches with BND prefix in the second procedure linkage
613 table look like this. */
615 static const bfd_byte elf_x86_64_bnd_plt2_entry[8] =
617 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
618 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
622 /* .eh_frame covering the .plt section. */
624 static const bfd_byte elf_x86_64_eh_frame_plt[] =
626 #define PLT_CIE_LENGTH 20
627 #define PLT_FDE_LENGTH 36
628 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
629 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
630 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
631 0, 0, 0, 0, /* CIE ID */
633 'z', 'R', 0, /* Augmentation string */
634 1, /* Code alignment factor */
635 0x78, /* Data alignment factor */
636 16, /* Return address column */
637 1, /* Augmentation size */
638 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
639 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
640 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
641 DW_CFA_nop, DW_CFA_nop,
643 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
644 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
645 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
646 0, 0, 0, 0, /* .plt size goes here */
647 0, /* Augmentation size */
648 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
649 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
650 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
651 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
652 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
653 11, /* Block length */
654 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
655 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
656 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
657 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
658 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
661 /* Architecture-specific backend data for x86-64. */
663 struct elf_x86_64_backend_data
665 /* Templates for the initial PLT entry and for subsequent entries. */
666 const bfd_byte *plt0_entry;
667 const bfd_byte *plt_entry;
668 unsigned int plt_entry_size; /* Size of each PLT entry. */
670 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
671 unsigned int plt0_got1_offset;
672 unsigned int plt0_got2_offset;
674 /* Offset of the end of the PC-relative instruction containing
676 unsigned int plt0_got2_insn_end;
678 /* Offsets into plt_entry that are to be replaced with... */
679 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
680 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
681 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
683 /* Length of the PC-relative instruction containing plt_got_offset. */
684 unsigned int plt_got_insn_size;
686 /* Offset of the end of the PC-relative jump to plt0_entry. */
687 unsigned int plt_plt_insn_end;
689 /* Offset into plt_entry where the initial value of the GOT entry points. */
690 unsigned int plt_lazy_offset;
692 /* .eh_frame covering the .plt section. */
693 const bfd_byte *eh_frame_plt;
694 unsigned int eh_frame_plt_size;
697 #define get_elf_x86_64_arch_data(bed) \
698 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
700 #define get_elf_x86_64_backend_data(abfd) \
701 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
703 #define GET_PLT_ENTRY_SIZE(abfd) \
704 get_elf_x86_64_backend_data (abfd)->plt_entry_size
706 /* These are the standard parameters. */
707 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
709 elf_x86_64_plt0_entry, /* plt0_entry */
710 elf_x86_64_plt_entry, /* plt_entry */
711 sizeof (elf_x86_64_plt_entry), /* plt_entry_size */
712 2, /* plt0_got1_offset */
713 8, /* plt0_got2_offset */
714 12, /* plt0_got2_insn_end */
715 2, /* plt_got_offset */
716 7, /* plt_reloc_offset */
717 12, /* plt_plt_offset */
718 6, /* plt_got_insn_size */
719 PLT_ENTRY_SIZE, /* plt_plt_insn_end */
720 6, /* plt_lazy_offset */
721 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
722 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
725 static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed =
727 elf_x86_64_bnd_plt0_entry, /* plt0_entry */
728 elf_x86_64_bnd_plt_entry, /* plt_entry */
729 sizeof (elf_x86_64_bnd_plt_entry), /* plt_entry_size */
730 2, /* plt0_got1_offset */
731 1+8, /* plt0_got2_offset */
732 1+12, /* plt0_got2_insn_end */
733 1+2, /* plt_got_offset */
734 1, /* plt_reloc_offset */
735 7, /* plt_plt_offset */
736 1+6, /* plt_got_insn_size */
737 11, /* plt_plt_insn_end */
738 0, /* plt_lazy_offset */
739 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
740 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
743 #define elf_backend_arch_data &elf_x86_64_arch_bed
745 /* x86-64 ELF linker hash entry. */
747 struct elf_x86_64_link_hash_entry
749 struct elf_link_hash_entry elf;
751 /* Track dynamic relocs copied for this symbol. */
752 struct elf_dyn_relocs *dyn_relocs;
754 #define GOT_UNKNOWN 0
758 #define GOT_TLS_GDESC 4
759 #define GOT_TLS_GD_BOTH_P(type) \
760 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
761 #define GOT_TLS_GD_P(type) \
762 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
763 #define GOT_TLS_GDESC_P(type) \
764 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
765 #define GOT_TLS_GD_ANY_P(type) \
766 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
767 unsigned char tls_type;
769 /* TRUE if a weak symbol with a real definition needs a copy reloc.
770 When there is a weak symbol with a real definition, the processor
771 independent code will have arranged for us to see the real
772 definition first. We need to copy the needs_copy bit from the
773 real definition and check it when allowing copy reloc in PIE. */
774 unsigned int needs_copy : 1;
776 /* TRUE if symbol has at least one BND relocation. */
777 unsigned int has_bnd_reloc : 1;
779 /* Reference count of C/C++ function pointer relocations in read-write
780 section which can be resolved at run-time. */
781 bfd_signed_vma func_pointer_refcount;
783 /* Information about the GOT PLT entry. Filled when there are both
784 GOT and PLT relocations against the same function. */
785 union gotplt_union plt_got;
787 /* Information about the second PLT entry. Filled when has_bnd_reloc is
789 union gotplt_union plt_bnd;
791 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
792 starting at the end of the jump table. */
796 #define elf_x86_64_hash_entry(ent) \
797 ((struct elf_x86_64_link_hash_entry *)(ent))
799 struct elf_x86_64_obj_tdata
801 struct elf_obj_tdata root;
803 /* tls_type for each local got entry. */
804 char *local_got_tls_type;
806 /* GOTPLT entries for TLS descriptors. */
807 bfd_vma *local_tlsdesc_gotent;
810 #define elf_x86_64_tdata(abfd) \
811 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
813 #define elf_x86_64_local_got_tls_type(abfd) \
814 (elf_x86_64_tdata (abfd)->local_got_tls_type)
816 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
817 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
819 #define is_x86_64_elf(bfd) \
820 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
821 && elf_tdata (bfd) != NULL \
822 && elf_object_id (bfd) == X86_64_ELF_DATA)
825 elf_x86_64_mkobject (bfd *abfd)
827 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
831 /* x86-64 ELF linker hash table. */
833 struct elf_x86_64_link_hash_table
835 struct elf_link_hash_table elf;
837 /* Short-cuts to get to dynamic linker sections. */
840 asection *plt_eh_frame;
846 bfd_signed_vma refcount;
850 /* The amount of space used by the jump slots in the GOT. */
851 bfd_vma sgotplt_jump_table_size;
853 /* Small local sym cache. */
854 struct sym_cache sym_cache;
856 bfd_vma (*r_info) (bfd_vma, bfd_vma);
857 bfd_vma (*r_sym) (bfd_vma);
858 unsigned int pointer_r_type;
859 const char *dynamic_interpreter;
860 int dynamic_interpreter_size;
862 /* _TLS_MODULE_BASE_ symbol. */
863 struct bfd_link_hash_entry *tls_module_base;
865 /* Used by local STT_GNU_IFUNC symbols. */
866 htab_t loc_hash_table;
867 void * loc_hash_memory;
869 /* The offset into splt of the PLT entry for the TLS descriptor
870 resolver. Special values are 0, if not necessary (or not found
871 to be necessary yet), and -1 if needed but not determined
874 /* The offset into sgot of the GOT entry used by the PLT entry
878 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
879 bfd_vma next_jump_slot_index;
880 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
881 bfd_vma next_irelative_index;
884 /* Get the x86-64 ELF linker hash table from a link_info structure. */
886 #define elf_x86_64_hash_table(p) \
887 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
888 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
890 #define elf_x86_64_compute_jump_table_size(htab) \
891 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
893 /* Create an entry in an x86-64 ELF linker hash table. */
895 static struct bfd_hash_entry *
896 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
897 struct bfd_hash_table *table,
900 /* Allocate the structure if it has not already been allocated by a
904 entry = (struct bfd_hash_entry *)
905 bfd_hash_allocate (table,
906 sizeof (struct elf_x86_64_link_hash_entry));
911 /* Call the allocation method of the superclass. */
912 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
915 struct elf_x86_64_link_hash_entry *eh;
917 eh = (struct elf_x86_64_link_hash_entry *) entry;
918 eh->dyn_relocs = NULL;
919 eh->tls_type = GOT_UNKNOWN;
921 eh->has_bnd_reloc = 0;
922 eh->func_pointer_refcount = 0;
923 eh->plt_bnd.offset = (bfd_vma) -1;
924 eh->plt_got.offset = (bfd_vma) -1;
925 eh->tlsdesc_got = (bfd_vma) -1;
931 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
932 for local symbol so that we can handle local STT_GNU_IFUNC symbols
933 as global symbol. We reuse indx and dynstr_index for local symbol
934 hash since they aren't used by global symbols in this backend. */
937 elf_x86_64_local_htab_hash (const void *ptr)
939 struct elf_link_hash_entry *h
940 = (struct elf_link_hash_entry *) ptr;
941 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
944 /* Compare local hash entries. */
947 elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
949 struct elf_link_hash_entry *h1
950 = (struct elf_link_hash_entry *) ptr1;
951 struct elf_link_hash_entry *h2
952 = (struct elf_link_hash_entry *) ptr2;
954 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
957 /* Find and/or create a hash entry for local symbol. */
959 static struct elf_link_hash_entry *
960 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
961 bfd *abfd, const Elf_Internal_Rela *rel,
964 struct elf_x86_64_link_hash_entry e, *ret;
965 asection *sec = abfd->sections;
966 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
967 htab->r_sym (rel->r_info));
970 e.elf.indx = sec->id;
971 e.elf.dynstr_index = htab->r_sym (rel->r_info);
972 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
973 create ? INSERT : NO_INSERT);
980 ret = (struct elf_x86_64_link_hash_entry *) *slot;
984 ret = (struct elf_x86_64_link_hash_entry *)
985 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
986 sizeof (struct elf_x86_64_link_hash_entry));
989 memset (ret, 0, sizeof (*ret));
990 ret->elf.indx = sec->id;
991 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
992 ret->elf.dynindx = -1;
993 ret->func_pointer_refcount = 0;
994 ret->plt_got.offset = (bfd_vma) -1;
1000 /* Destroy an X86-64 ELF linker hash table. */
1003 elf_x86_64_link_hash_table_free (bfd *obfd)
1005 struct elf_x86_64_link_hash_table *htab
1006 = (struct elf_x86_64_link_hash_table *) obfd->link.hash;
1008 if (htab->loc_hash_table)
1009 htab_delete (htab->loc_hash_table);
1010 if (htab->loc_hash_memory)
1011 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1012 _bfd_elf_link_hash_table_free (obfd);
1015 /* Create an X86-64 ELF linker hash table. */
1017 static struct bfd_link_hash_table *
1018 elf_x86_64_link_hash_table_create (bfd *abfd)
1020 struct elf_x86_64_link_hash_table *ret;
1021 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
1023 ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt);
1027 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1028 elf_x86_64_link_hash_newfunc,
1029 sizeof (struct elf_x86_64_link_hash_entry),
1036 if (ABI_64_P (abfd))
1038 ret->r_info = elf64_r_info;
1039 ret->r_sym = elf64_r_sym;
1040 ret->pointer_r_type = R_X86_64_64;
1041 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
1042 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
1046 ret->r_info = elf32_r_info;
1047 ret->r_sym = elf32_r_sym;
1048 ret->pointer_r_type = R_X86_64_32;
1049 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1050 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
1053 ret->loc_hash_table = htab_try_create (1024,
1054 elf_x86_64_local_htab_hash,
1055 elf_x86_64_local_htab_eq,
1057 ret->loc_hash_memory = objalloc_create ();
1058 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1060 elf_x86_64_link_hash_table_free (abfd);
1063 ret->elf.root.hash_table_free = elf_x86_64_link_hash_table_free;
1065 return &ret->elf.root;
1068 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1069 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1073 elf_x86_64_create_dynamic_sections (bfd *dynobj,
1074 struct bfd_link_info *info)
1076 struct elf_x86_64_link_hash_table *htab;
1078 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1081 htab = elf_x86_64_hash_table (info);
1085 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1089 if (bfd_link_executable (info))
1091 /* Always allow copy relocs for building executables. */
1092 asection *s = bfd_get_linker_section (dynobj, ".rela.bss");
1095 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1096 s = bfd_make_section_anyway_with_flags (dynobj,
1098 (bed->dynamic_sec_flags
1101 || ! bfd_set_section_alignment (dynobj, s,
1102 bed->s->log_file_align))
1108 if (!info->no_ld_generated_unwind_info
1109 && htab->plt_eh_frame == NULL
1110 && htab->elf.splt != NULL)
1112 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1113 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1114 | SEC_LINKER_CREATED);
1116 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1117 if (htab->plt_eh_frame == NULL
1118 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
1124 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1127 elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1128 struct elf_link_hash_entry *dir,
1129 struct elf_link_hash_entry *ind)
1131 struct elf_x86_64_link_hash_entry *edir, *eind;
1133 edir = (struct elf_x86_64_link_hash_entry *) dir;
1134 eind = (struct elf_x86_64_link_hash_entry *) ind;
1136 if (!edir->has_bnd_reloc)
1137 edir->has_bnd_reloc = eind->has_bnd_reloc;
1139 if (eind->dyn_relocs != NULL)
1141 if (edir->dyn_relocs != NULL)
1143 struct elf_dyn_relocs **pp;
1144 struct elf_dyn_relocs *p;
1146 /* Add reloc counts against the indirect sym to the direct sym
1147 list. Merge any entries against the same section. */
1148 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1150 struct elf_dyn_relocs *q;
1152 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1153 if (q->sec == p->sec)
1155 q->pc_count += p->pc_count;
1156 q->count += p->count;
1163 *pp = edir->dyn_relocs;
1166 edir->dyn_relocs = eind->dyn_relocs;
1167 eind->dyn_relocs = NULL;
1170 if (ind->root.type == bfd_link_hash_indirect
1171 && dir->got.refcount <= 0)
1173 edir->tls_type = eind->tls_type;
1174 eind->tls_type = GOT_UNKNOWN;
1177 if (ELIMINATE_COPY_RELOCS
1178 && ind->root.type != bfd_link_hash_indirect
1179 && dir->dynamic_adjusted)
1181 /* If called to transfer flags for a weakdef during processing
1182 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1183 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1184 dir->ref_dynamic |= ind->ref_dynamic;
1185 dir->ref_regular |= ind->ref_regular;
1186 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1187 dir->needs_plt |= ind->needs_plt;
1188 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1192 if (eind->func_pointer_refcount > 0)
1194 edir->func_pointer_refcount += eind->func_pointer_refcount;
1195 eind->func_pointer_refcount = 0;
1198 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1203 elf64_x86_64_elf_object_p (bfd *abfd)
1205 /* Set the right machine number for an x86-64 elf64 file. */
1206 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
1211 elf32_x86_64_elf_object_p (bfd *abfd)
1213 /* Set the right machine number for an x86-64 elf32 file. */
1214 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1218 /* Return TRUE if the TLS access code sequence support transition
1222 elf_x86_64_check_tls_transition (bfd *abfd,
1223 struct bfd_link_info *info,
1226 Elf_Internal_Shdr *symtab_hdr,
1227 struct elf_link_hash_entry **sym_hashes,
1228 unsigned int r_type,
1229 const Elf_Internal_Rela *rel,
1230 const Elf_Internal_Rela *relend)
1233 unsigned long r_symndx;
1234 bfd_boolean largepic = FALSE;
1235 struct elf_link_hash_entry *h;
1237 struct elf_x86_64_link_hash_table *htab;
1239 /* Get the section contents. */
1240 if (contents == NULL)
1242 if (elf_section_data (sec)->this_hdr.contents != NULL)
1243 contents = elf_section_data (sec)->this_hdr.contents;
1246 /* FIXME: How to better handle error condition? */
1247 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1250 /* Cache the section contents for elf_link_input_bfd. */
1251 elf_section_data (sec)->this_hdr.contents = contents;
1255 htab = elf_x86_64_hash_table (info);
1256 offset = rel->r_offset;
1259 case R_X86_64_TLSGD:
1260 case R_X86_64_TLSLD:
1261 if ((rel + 1) >= relend)
1264 if (r_type == R_X86_64_TLSGD)
1266 /* Check transition from GD access model. For 64bit, only
1267 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1268 .word 0x6666; rex64; call __tls_get_addr
1269 can transit to different access model. For 32bit, only
1270 leaq foo@tlsgd(%rip), %rdi
1271 .word 0x6666; rex64; call __tls_get_addr
1272 can transit to different access model. For largepic
1274 leaq foo@tlsgd(%rip), %rdi
1275 movabsq $__tls_get_addr@pltoff, %rax
1279 static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
1280 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1282 if ((offset + 12) > sec->size)
1285 if (memcmp (contents + offset + 4, call, 4) != 0)
1287 if (!ABI_64_P (abfd)
1288 || (offset + 19) > sec->size
1290 || memcmp (contents + offset - 3, leaq + 1, 3) != 0
1291 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1292 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1297 else if (ABI_64_P (abfd))
1300 || memcmp (contents + offset - 4, leaq, 4) != 0)
1306 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
1312 /* Check transition from LD access model. Only
1313 leaq foo@tlsld(%rip), %rdi;
1315 can transit to different access model. For largepic
1317 leaq foo@tlsld(%rip), %rdi
1318 movabsq $__tls_get_addr@pltoff, %rax
1322 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
1324 if (offset < 3 || (offset + 9) > sec->size)
1327 if (memcmp (contents + offset - 3, lea, 3) != 0)
1330 if (0xe8 != *(contents + offset + 4))
1332 if (!ABI_64_P (abfd)
1333 || (offset + 19) > sec->size
1334 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1335 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1342 r_symndx = htab->r_sym (rel[1].r_info);
1343 if (r_symndx < symtab_hdr->sh_info)
1346 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1347 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1348 may be versioned. */
1350 && h->root.root.string != NULL
1352 ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64
1353 : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1354 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32))
1355 && (strncmp (h->root.root.string,
1356 "__tls_get_addr", 14) == 0));
1358 case R_X86_64_GOTTPOFF:
1359 /* Check transition from IE access model:
1360 mov foo@gottpoff(%rip), %reg
1361 add foo@gottpoff(%rip), %reg
1364 /* Check REX prefix first. */
1365 if (offset >= 3 && (offset + 4) <= sec->size)
1367 val = bfd_get_8 (abfd, contents + offset - 3);
1368 if (val != 0x48 && val != 0x4c)
1370 /* X32 may have 0x44 REX prefix or no REX prefix. */
1371 if (ABI_64_P (abfd))
1377 /* X32 may not have any REX prefix. */
1378 if (ABI_64_P (abfd))
1380 if (offset < 2 || (offset + 3) > sec->size)
1384 val = bfd_get_8 (abfd, contents + offset - 2);
1385 if (val != 0x8b && val != 0x03)
1388 val = bfd_get_8 (abfd, contents + offset - 1);
1389 return (val & 0xc7) == 5;
1391 case R_X86_64_GOTPC32_TLSDESC:
1392 /* Check transition from GDesc access model:
1393 leaq x@tlsdesc(%rip), %rax
1395 Make sure it's a leaq adding rip to a 32-bit offset
1396 into any register, although it's probably almost always
1399 if (offset < 3 || (offset + 4) > sec->size)
1402 val = bfd_get_8 (abfd, contents + offset - 3);
1403 if ((val & 0xfb) != 0x48)
1406 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1409 val = bfd_get_8 (abfd, contents + offset - 1);
1410 return (val & 0xc7) == 0x05;
1412 case R_X86_64_TLSDESC_CALL:
1413 /* Check transition from GDesc access model:
1414 call *x@tlsdesc(%rax)
1416 if (offset + 2 <= sec->size)
1418 /* Make sure that it's a call *x@tlsdesc(%rax). */
1419 static const unsigned char call[] = { 0xff, 0x10 };
1420 return memcmp (contents + offset, call, 2) == 0;
1430 /* Return TRUE if the TLS access transition is OK or no transition
1431 will be performed. Update R_TYPE if there is a transition. */
1434 elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1435 asection *sec, bfd_byte *contents,
1436 Elf_Internal_Shdr *symtab_hdr,
1437 struct elf_link_hash_entry **sym_hashes,
1438 unsigned int *r_type, int tls_type,
1439 const Elf_Internal_Rela *rel,
1440 const Elf_Internal_Rela *relend,
1441 struct elf_link_hash_entry *h,
1442 unsigned long r_symndx)
1444 unsigned int from_type = *r_type;
1445 unsigned int to_type = from_type;
1446 bfd_boolean check = TRUE;
1448 /* Skip TLS transition for functions. */
1450 && (h->type == STT_FUNC
1451 || h->type == STT_GNU_IFUNC))
1456 case R_X86_64_TLSGD:
1457 case R_X86_64_GOTPC32_TLSDESC:
1458 case R_X86_64_TLSDESC_CALL:
1459 case R_X86_64_GOTTPOFF:
1460 if (bfd_link_executable (info))
1463 to_type = R_X86_64_TPOFF32;
1465 to_type = R_X86_64_GOTTPOFF;
1468 /* When we are called from elf_x86_64_relocate_section,
1469 CONTENTS isn't NULL and there may be additional transitions
1470 based on TLS_TYPE. */
1471 if (contents != NULL)
1473 unsigned int new_to_type = to_type;
1475 if (bfd_link_executable (info)
1478 && tls_type == GOT_TLS_IE)
1479 new_to_type = R_X86_64_TPOFF32;
1481 if (to_type == R_X86_64_TLSGD
1482 || to_type == R_X86_64_GOTPC32_TLSDESC
1483 || to_type == R_X86_64_TLSDESC_CALL)
1485 if (tls_type == GOT_TLS_IE)
1486 new_to_type = R_X86_64_GOTTPOFF;
1489 /* We checked the transition before when we were called from
1490 elf_x86_64_check_relocs. We only want to check the new
1491 transition which hasn't been checked before. */
1492 check = new_to_type != to_type && from_type == to_type;
1493 to_type = new_to_type;
1498 case R_X86_64_TLSLD:
1499 if (bfd_link_executable (info))
1500 to_type = R_X86_64_TPOFF32;
1507 /* Return TRUE if there is no transition. */
1508 if (from_type == to_type)
1511 /* Check if the transition can be performed. */
1513 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1514 symtab_hdr, sym_hashes,
1515 from_type, rel, relend))
1517 reloc_howto_type *from, *to;
1520 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1521 to = elf_x86_64_rtype_to_howto (abfd, to_type);
1524 name = h->root.root.string;
1527 struct elf_x86_64_link_hash_table *htab;
1529 htab = elf_x86_64_hash_table (info);
1534 Elf_Internal_Sym *isym;
1536 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1538 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1542 (*_bfd_error_handler)
1543 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1544 "in section `%A' failed"),
1545 abfd, sec, from->name, to->name, name,
1546 (unsigned long) rel->r_offset);
1547 bfd_set_error (bfd_error_bad_value);
1555 /* Rename some of the generic section flags to better document how they
1557 #define need_convert_load sec_flg0
1559 /* Look through the relocs for a section during the first phase, and
1560 calculate needed space in the global offset table, procedure
1561 linkage table, and dynamic reloc sections. */
1564 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1566 const Elf_Internal_Rela *relocs)
1568 struct elf_x86_64_link_hash_table *htab;
1569 Elf_Internal_Shdr *symtab_hdr;
1570 struct elf_link_hash_entry **sym_hashes;
1571 const Elf_Internal_Rela *rel;
1572 const Elf_Internal_Rela *rel_end;
1574 bfd_boolean use_plt_got;
1576 if (bfd_link_relocatable (info))
1579 BFD_ASSERT (is_x86_64_elf (abfd));
1581 htab = elf_x86_64_hash_table (info);
1585 use_plt_got = get_elf_x86_64_backend_data (abfd) == &elf_x86_64_arch_bed;
1587 symtab_hdr = &elf_symtab_hdr (abfd);
1588 sym_hashes = elf_sym_hashes (abfd);
1592 rel_end = relocs + sec->reloc_count;
1593 for (rel = relocs; rel < rel_end; rel++)
1595 unsigned int r_type;
1596 unsigned long r_symndx;
1597 struct elf_link_hash_entry *h;
1598 Elf_Internal_Sym *isym;
1600 bfd_boolean size_reloc;
1602 r_symndx = htab->r_sym (rel->r_info);
1603 r_type = ELF32_R_TYPE (rel->r_info);
1605 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1607 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1612 if (r_symndx < symtab_hdr->sh_info)
1614 /* A local symbol. */
1615 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1620 /* Check relocation against local STT_GNU_IFUNC symbol. */
1621 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1623 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1628 /* Fake a STT_GNU_IFUNC symbol. */
1629 h->type = STT_GNU_IFUNC;
1632 h->forced_local = 1;
1633 h->root.type = bfd_link_hash_defined;
1641 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1642 while (h->root.type == bfd_link_hash_indirect
1643 || h->root.type == bfd_link_hash_warning)
1644 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1647 /* Check invalid x32 relocations. */
1648 if (!ABI_64_P (abfd))
1654 case R_X86_64_DTPOFF64:
1655 case R_X86_64_TPOFF64:
1657 case R_X86_64_GOTOFF64:
1658 case R_X86_64_GOT64:
1659 case R_X86_64_GOTPCREL64:
1660 case R_X86_64_GOTPC64:
1661 case R_X86_64_GOTPLT64:
1662 case R_X86_64_PLTOFF64:
1665 name = h->root.root.string;
1667 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1669 (*_bfd_error_handler)
1670 (_("%B: relocation %s against symbol `%s' isn't "
1671 "supported in x32 mode"), abfd,
1672 x86_64_elf_howto_table[r_type].name, name);
1673 bfd_set_error (bfd_error_bad_value);
1681 /* Create the ifunc sections for static executables. If we
1682 never see an indirect function symbol nor we are building
1683 a static executable, those sections will be empty and
1684 won't appear in output. */
1690 case R_X86_64_PC32_BND:
1691 case R_X86_64_PLT32_BND:
1693 case R_X86_64_PLT32:
1696 /* MPX PLT is supported only if elf_x86_64_arch_bed
1697 is used in 64-bit mode. */
1700 && (get_elf_x86_64_backend_data (abfd)
1701 == &elf_x86_64_arch_bed))
1703 elf_x86_64_hash_entry (h)->has_bnd_reloc = 1;
1705 /* Create the second PLT for Intel MPX support. */
1706 if (htab->plt_bnd == NULL)
1708 unsigned int plt_bnd_align;
1709 const struct elf_backend_data *bed;
1711 bed = get_elf_backend_data (info->output_bfd);
1712 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry) == 8
1713 && (sizeof (elf_x86_64_bnd_plt2_entry)
1714 == sizeof (elf_x86_64_legacy_plt2_entry)));
1717 if (htab->elf.dynobj == NULL)
1718 htab->elf.dynobj = abfd;
1720 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1722 (bed->dynamic_sec_flags
1727 if (htab->plt_bnd == NULL
1728 || !bfd_set_section_alignment (htab->elf.dynobj,
1737 case R_X86_64_GOTPCREL:
1738 case R_X86_64_GOTPCRELX:
1739 case R_X86_64_REX_GOTPCRELX:
1740 case R_X86_64_GOTPCREL64:
1741 if (htab->elf.dynobj == NULL)
1742 htab->elf.dynobj = abfd;
1743 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1748 /* It is referenced by a non-shared object. */
1750 h->root.non_ir_ref = 1;
1752 if (h->type == STT_GNU_IFUNC)
1753 elf_tdata (info->output_bfd)->has_gnu_symbols
1754 |= elf_gnu_symbol_ifunc;
1757 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1758 symtab_hdr, sym_hashes,
1759 &r_type, GOT_UNKNOWN,
1760 rel, rel_end, h, r_symndx))
1765 case R_X86_64_TLSLD:
1766 htab->tls_ld_got.refcount += 1;
1769 case R_X86_64_TPOFF32:
1770 if (!bfd_link_executable (info) && ABI_64_P (abfd))
1773 name = h->root.root.string;
1775 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1777 (*_bfd_error_handler)
1778 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1780 x86_64_elf_howto_table[r_type].name, name);
1781 bfd_set_error (bfd_error_bad_value);
1786 case R_X86_64_GOTTPOFF:
1787 if (!bfd_link_executable (info))
1788 info->flags |= DF_STATIC_TLS;
1791 case R_X86_64_GOT32:
1792 case R_X86_64_GOTPCREL:
1793 case R_X86_64_GOTPCRELX:
1794 case R_X86_64_REX_GOTPCRELX:
1795 case R_X86_64_TLSGD:
1796 case R_X86_64_GOT64:
1797 case R_X86_64_GOTPCREL64:
1798 case R_X86_64_GOTPLT64:
1799 case R_X86_64_GOTPC32_TLSDESC:
1800 case R_X86_64_TLSDESC_CALL:
1801 /* This symbol requires a global offset table entry. */
1803 int tls_type, old_tls_type;
1807 default: tls_type = GOT_NORMAL; break;
1808 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1809 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
1810 case R_X86_64_GOTPC32_TLSDESC:
1811 case R_X86_64_TLSDESC_CALL:
1812 tls_type = GOT_TLS_GDESC; break;
1817 h->got.refcount += 1;
1818 old_tls_type = elf_x86_64_hash_entry (h)->tls_type;
1822 bfd_signed_vma *local_got_refcounts;
1824 /* This is a global offset table entry for a local symbol. */
1825 local_got_refcounts = elf_local_got_refcounts (abfd);
1826 if (local_got_refcounts == NULL)
1830 size = symtab_hdr->sh_info;
1831 size *= sizeof (bfd_signed_vma)
1832 + sizeof (bfd_vma) + sizeof (char);
1833 local_got_refcounts = ((bfd_signed_vma *)
1834 bfd_zalloc (abfd, size));
1835 if (local_got_refcounts == NULL)
1837 elf_local_got_refcounts (abfd) = local_got_refcounts;
1838 elf_x86_64_local_tlsdesc_gotent (abfd)
1839 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1840 elf_x86_64_local_got_tls_type (abfd)
1841 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1843 local_got_refcounts[r_symndx] += 1;
1845 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
1848 /* If a TLS symbol is accessed using IE at least once,
1849 there is no point to use dynamic model for it. */
1850 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1851 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1852 || tls_type != GOT_TLS_IE))
1854 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
1855 tls_type = old_tls_type;
1856 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1857 && GOT_TLS_GD_ANY_P (tls_type))
1858 tls_type |= old_tls_type;
1862 name = h->root.root.string;
1864 name = bfd_elf_sym_name (abfd, symtab_hdr,
1866 (*_bfd_error_handler)
1867 (_("%B: '%s' accessed both as normal and thread local symbol"),
1869 bfd_set_error (bfd_error_bad_value);
1874 if (old_tls_type != tls_type)
1877 elf_x86_64_hash_entry (h)->tls_type = tls_type;
1879 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
1884 case R_X86_64_GOTOFF64:
1885 case R_X86_64_GOTPC32:
1886 case R_X86_64_GOTPC64:
1888 if (htab->elf.sgot == NULL)
1890 if (htab->elf.dynobj == NULL)
1891 htab->elf.dynobj = abfd;
1892 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1898 case R_X86_64_PLT32:
1899 case R_X86_64_PLT32_BND:
1900 /* This symbol requires a procedure linkage table entry. We
1901 actually build the entry in adjust_dynamic_symbol,
1902 because this might be a case of linking PIC code which is
1903 never referenced by a dynamic object, in which case we
1904 don't need to generate a procedure linkage table entry
1907 /* If this is a local symbol, we resolve it directly without
1908 creating a procedure linkage table entry. */
1913 h->plt.refcount += 1;
1916 case R_X86_64_PLTOFF64:
1917 /* This tries to form the 'address' of a function relative
1918 to GOT. For global symbols we need a PLT entry. */
1922 h->plt.refcount += 1;
1926 case R_X86_64_SIZE32:
1927 case R_X86_64_SIZE64:
1932 if (!ABI_64_P (abfd))
1937 /* Let's help debug shared library creation. These relocs
1938 cannot be used in shared libs. Don't error out for
1939 sections we don't care about, such as debug sections or
1940 non-constant sections. */
1941 if (bfd_link_pic (info)
1942 && (sec->flags & SEC_ALLOC) != 0
1943 && (sec->flags & SEC_READONLY) != 0)
1946 name = h->root.root.string;
1948 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1949 (*_bfd_error_handler)
1950 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1951 abfd, x86_64_elf_howto_table[r_type].name, name);
1952 bfd_set_error (bfd_error_bad_value);
1960 case R_X86_64_PC32_BND:
1964 if (h != NULL && bfd_link_executable (info))
1966 /* If this reloc is in a read-only section, we might
1967 need a copy reloc. We can't check reliably at this
1968 stage whether the section is read-only, as input
1969 sections have not yet been mapped to output sections.
1970 Tentatively set the flag for now, and correct in
1971 adjust_dynamic_symbol. */
1974 /* We may need a .plt entry if the function this reloc
1975 refers to is in a shared lib. */
1976 h->plt.refcount += 1;
1977 if (r_type == R_X86_64_PC32)
1979 /* Since something like ".long foo - ." may be used
1980 as pointer, make sure that PLT is used if foo is
1981 a function defined in a shared library. */
1982 if ((sec->flags & SEC_CODE) == 0)
1983 h->pointer_equality_needed = 1;
1985 else if (r_type != R_X86_64_PC32_BND
1986 && r_type != R_X86_64_PC64)
1988 h->pointer_equality_needed = 1;
1989 /* At run-time, R_X86_64_64 can be resolved for both
1990 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
1991 can only be resolved for x32. */
1992 if ((sec->flags & SEC_READONLY) == 0
1993 && (r_type == R_X86_64_64
1994 || (!ABI_64_P (abfd)
1995 && (r_type == R_X86_64_32
1996 || r_type == R_X86_64_32S))))
1998 struct elf_x86_64_link_hash_entry *eh
1999 = (struct elf_x86_64_link_hash_entry *) h;
2000 eh->func_pointer_refcount += 1;
2007 /* If we are creating a shared library, and this is a reloc
2008 against a global symbol, or a non PC relative reloc
2009 against a local symbol, then we need to copy the reloc
2010 into the shared library. However, if we are linking with
2011 -Bsymbolic, we do not need to copy a reloc against a
2012 global symbol which is defined in an object we are
2013 including in the link (i.e., DEF_REGULAR is set). At
2014 this point we have not seen all the input files, so it is
2015 possible that DEF_REGULAR is not set now but will be set
2016 later (it is never cleared). In case of a weak definition,
2017 DEF_REGULAR may be cleared later by a strong definition in
2018 a shared library. We account for that possibility below by
2019 storing information in the relocs_copied field of the hash
2020 table entry. A similar situation occurs when creating
2021 shared libraries and symbol visibility changes render the
2024 If on the other hand, we are creating an executable, we
2025 may need to keep relocations for symbols satisfied by a
2026 dynamic library if we manage to avoid copy relocs for the
2028 if ((bfd_link_pic (info)
2029 && (sec->flags & SEC_ALLOC) != 0
2030 && (! IS_X86_64_PCREL_TYPE (r_type)
2032 && (! SYMBOLIC_BIND (info, h)
2033 || h->root.type == bfd_link_hash_defweak
2034 || !h->def_regular))))
2035 || (ELIMINATE_COPY_RELOCS
2036 && !bfd_link_pic (info)
2037 && (sec->flags & SEC_ALLOC) != 0
2039 && (h->root.type == bfd_link_hash_defweak
2040 || !h->def_regular)))
2042 struct elf_dyn_relocs *p;
2043 struct elf_dyn_relocs **head;
2045 /* We must copy these reloc types into the output file.
2046 Create a reloc section in dynobj and make room for
2050 if (htab->elf.dynobj == NULL)
2051 htab->elf.dynobj = abfd;
2053 sreloc = _bfd_elf_make_dynamic_reloc_section
2054 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
2055 abfd, /*rela?*/ TRUE);
2061 /* If this is a global symbol, we count the number of
2062 relocations we need for this symbol. */
2065 head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs;
2069 /* Track dynamic relocs needed for local syms too.
2070 We really need local syms available to do this
2075 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2080 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2084 /* Beware of type punned pointers vs strict aliasing
2086 vpp = &(elf_section_data (s)->local_dynrel);
2087 head = (struct elf_dyn_relocs **)vpp;
2091 if (p == NULL || p->sec != sec)
2093 bfd_size_type amt = sizeof *p;
2095 p = ((struct elf_dyn_relocs *)
2096 bfd_alloc (htab->elf.dynobj, amt));
2107 /* Count size relocation as PC-relative relocation. */
2108 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
2113 /* This relocation describes the C++ object vtable hierarchy.
2114 Reconstruct it for later use during GC. */
2115 case R_X86_64_GNU_VTINHERIT:
2116 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2120 /* This relocation describes which C++ vtable entries are actually
2121 used. Record for later use during GC. */
2122 case R_X86_64_GNU_VTENTRY:
2123 BFD_ASSERT (h != NULL);
2125 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2135 && h->plt.refcount > 0
2136 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2137 || h->got.refcount > 0)
2138 && htab->plt_got == NULL)
2140 /* Create the GOT procedure linkage table. */
2141 unsigned int plt_got_align;
2142 const struct elf_backend_data *bed;
2144 bed = get_elf_backend_data (info->output_bfd);
2145 BFD_ASSERT (sizeof (elf_x86_64_legacy_plt2_entry) == 8
2146 && (sizeof (elf_x86_64_bnd_plt2_entry)
2147 == sizeof (elf_x86_64_legacy_plt2_entry)));
2150 if (htab->elf.dynobj == NULL)
2151 htab->elf.dynobj = abfd;
2153 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2155 (bed->dynamic_sec_flags
2160 if (htab->plt_got == NULL
2161 || !bfd_set_section_alignment (htab->elf.dynobj,
2167 if ((r_type == R_X86_64_GOTPCREL
2168 || r_type == R_X86_64_GOTPCRELX
2169 || r_type == R_X86_64_REX_GOTPCRELX)
2170 && (h == NULL || h->type != STT_GNU_IFUNC))
2171 sec->need_convert_load = 1;
2177 /* Return the section that should be marked against GC for a given
2181 elf_x86_64_gc_mark_hook (asection *sec,
2182 struct bfd_link_info *info,
2183 Elf_Internal_Rela *rel,
2184 struct elf_link_hash_entry *h,
2185 Elf_Internal_Sym *sym)
2188 switch (ELF32_R_TYPE (rel->r_info))
2190 case R_X86_64_GNU_VTINHERIT:
2191 case R_X86_64_GNU_VTENTRY:
2195 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2198 /* Update the got entry reference counts for the section being removed. */
2201 elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
2203 const Elf_Internal_Rela *relocs)
2205 struct elf_x86_64_link_hash_table *htab;
2206 Elf_Internal_Shdr *symtab_hdr;
2207 struct elf_link_hash_entry **sym_hashes;
2208 bfd_signed_vma *local_got_refcounts;
2209 const Elf_Internal_Rela *rel, *relend;
2211 if (bfd_link_relocatable (info))
2214 htab = elf_x86_64_hash_table (info);
2218 elf_section_data (sec)->local_dynrel = NULL;
2220 symtab_hdr = &elf_symtab_hdr (abfd);
2221 sym_hashes = elf_sym_hashes (abfd);
2222 local_got_refcounts = elf_local_got_refcounts (abfd);
2224 htab = elf_x86_64_hash_table (info);
2225 relend = relocs + sec->reloc_count;
2226 for (rel = relocs; rel < relend; rel++)
2228 unsigned long r_symndx;
2229 unsigned int r_type;
2230 struct elf_link_hash_entry *h = NULL;
2231 bfd_boolean pointer_reloc;
2233 r_symndx = htab->r_sym (rel->r_info);
2234 if (r_symndx >= symtab_hdr->sh_info)
2236 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2237 while (h->root.type == bfd_link_hash_indirect
2238 || h->root.type == bfd_link_hash_warning)
2239 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2243 /* A local symbol. */
2244 Elf_Internal_Sym *isym;
2246 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2249 /* Check relocation against local STT_GNU_IFUNC symbol. */
2251 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2253 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE);
2261 struct elf_x86_64_link_hash_entry *eh;
2262 struct elf_dyn_relocs **pp;
2263 struct elf_dyn_relocs *p;
2265 eh = (struct elf_x86_64_link_hash_entry *) h;
2267 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2270 /* Everything must go for SEC. */
2276 r_type = ELF32_R_TYPE (rel->r_info);
2277 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
2278 symtab_hdr, sym_hashes,
2279 &r_type, GOT_UNKNOWN,
2280 rel, relend, h, r_symndx))
2283 pointer_reloc = FALSE;
2286 case R_X86_64_TLSLD:
2287 if (htab->tls_ld_got.refcount > 0)
2288 htab->tls_ld_got.refcount -= 1;
2291 case R_X86_64_TLSGD:
2292 case R_X86_64_GOTPC32_TLSDESC:
2293 case R_X86_64_TLSDESC_CALL:
2294 case R_X86_64_GOTTPOFF:
2295 case R_X86_64_GOT32:
2296 case R_X86_64_GOTPCREL:
2297 case R_X86_64_GOTPCRELX:
2298 case R_X86_64_REX_GOTPCRELX:
2299 case R_X86_64_GOT64:
2300 case R_X86_64_GOTPCREL64:
2301 case R_X86_64_GOTPLT64:
2304 if (h->got.refcount > 0)
2305 h->got.refcount -= 1;
2306 if (h->type == STT_GNU_IFUNC)
2308 if (h->plt.refcount > 0)
2309 h->plt.refcount -= 1;
2312 else if (local_got_refcounts != NULL)
2314 if (local_got_refcounts[r_symndx] > 0)
2315 local_got_refcounts[r_symndx] -= 1;
2321 pointer_reloc = !ABI_64_P (abfd);
2325 pointer_reloc = TRUE;
2331 case R_X86_64_PC32_BND:
2333 case R_X86_64_SIZE32:
2334 case R_X86_64_SIZE64:
2336 if (bfd_link_pic (info)
2337 && (h == NULL || h->type != STT_GNU_IFUNC))
2341 case R_X86_64_PLT32:
2342 case R_X86_64_PLT32_BND:
2343 case R_X86_64_PLTOFF64:
2346 if (h->plt.refcount > 0)
2347 h->plt.refcount -= 1;
2348 if (pointer_reloc && (sec->flags & SEC_READONLY) == 0)
2350 struct elf_x86_64_link_hash_entry *eh
2351 = (struct elf_x86_64_link_hash_entry *) h;
2352 if (eh->func_pointer_refcount > 0)
2353 eh->func_pointer_refcount -= 1;
2366 /* Adjust a symbol defined by a dynamic object and referenced by a
2367 regular object. The current definition is in some section of the
2368 dynamic object, but we're not including those sections. We have to
2369 change the definition to something the rest of the link can
2373 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2374 struct elf_link_hash_entry *h)
2376 struct elf_x86_64_link_hash_table *htab;
2378 struct elf_x86_64_link_hash_entry *eh;
2379 struct elf_dyn_relocs *p;
2381 /* STT_GNU_IFUNC symbol must go through PLT. */
2382 if (h->type == STT_GNU_IFUNC)
2384 /* All local STT_GNU_IFUNC references must be treate as local
2385 calls via local PLT. */
2387 && SYMBOL_CALLS_LOCAL (info, h))
2389 bfd_size_type pc_count = 0, count = 0;
2390 struct elf_dyn_relocs **pp;
2392 eh = (struct elf_x86_64_link_hash_entry *) h;
2393 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2395 pc_count += p->pc_count;
2396 p->count -= p->pc_count;
2405 if (pc_count || count)
2409 if (h->plt.refcount <= 0)
2410 h->plt.refcount = 1;
2412 h->plt.refcount += 1;
2416 if (h->plt.refcount <= 0)
2418 h->plt.offset = (bfd_vma) -1;
2424 /* If this is a function, put it in the procedure linkage table. We
2425 will fill in the contents of the procedure linkage table later,
2426 when we know the address of the .got section. */
2427 if (h->type == STT_FUNC
2430 if (h->plt.refcount <= 0
2431 || SYMBOL_CALLS_LOCAL (info, h)
2432 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2433 && h->root.type == bfd_link_hash_undefweak))
2435 /* This case can occur if we saw a PLT32 reloc in an input
2436 file, but the symbol was never referred to by a dynamic
2437 object, or if all references were garbage collected. In
2438 such a case, we don't actually need to build a procedure
2439 linkage table, and we can just do a PC32 reloc instead. */
2440 h->plt.offset = (bfd_vma) -1;
2447 /* It's possible that we incorrectly decided a .plt reloc was
2448 needed for an R_X86_64_PC32 reloc to a non-function sym in
2449 check_relocs. We can't decide accurately between function and
2450 non-function syms in check-relocs; Objects loaded later in
2451 the link may change h->type. So fix it now. */
2452 h->plt.offset = (bfd_vma) -1;
2454 /* If this is a weak symbol, and there is a real definition, the
2455 processor independent code will have arranged for us to see the
2456 real definition first, and we can just use the same value. */
2457 if (h->u.weakdef != NULL)
2459 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2460 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2461 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2462 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2463 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2465 eh = (struct elf_x86_64_link_hash_entry *) h;
2466 h->non_got_ref = h->u.weakdef->non_got_ref;
2467 eh->needs_copy = h->u.weakdef->needs_copy;
2472 /* This is a reference to a symbol defined by a dynamic object which
2473 is not a function. */
2475 /* If we are creating a shared library, we must presume that the
2476 only references to the symbol are via the global offset table.
2477 For such cases we need not do anything here; the relocations will
2478 be handled correctly by relocate_section. */
2479 if (!bfd_link_executable (info))
2482 /* If there are no references to this symbol that do not use the
2483 GOT, we don't need to generate a copy reloc. */
2484 if (!h->non_got_ref)
2487 /* If -z nocopyreloc was given, we won't generate them either. */
2488 if (info->nocopyreloc)
2494 if (ELIMINATE_COPY_RELOCS)
2496 eh = (struct elf_x86_64_link_hash_entry *) h;
2497 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2499 s = p->sec->output_section;
2500 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2504 /* If we didn't find any dynamic relocs in read-only sections, then
2505 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2513 /* We must allocate the symbol in our .dynbss section, which will
2514 become part of the .bss section of the executable. There will be
2515 an entry for this symbol in the .dynsym section. The dynamic
2516 object will contain position independent code, so all references
2517 from the dynamic object to this symbol will go through the global
2518 offset table. The dynamic linker will use the .dynsym entry to
2519 determine the address it must put in the global offset table, so
2520 both the dynamic object and the regular object will refer to the
2521 same memory location for the variable. */
2523 htab = elf_x86_64_hash_table (info);
2527 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2528 to copy the initial value out of the dynamic object and into the
2529 runtime process image. */
2530 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2532 const struct elf_backend_data *bed;
2533 bed = get_elf_backend_data (info->output_bfd);
2534 htab->srelbss->size += bed->s->sizeof_rela;
2540 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2543 /* Allocate space in .plt, .got and associated reloc sections for
2547 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2549 struct bfd_link_info *info;
2550 struct elf_x86_64_link_hash_table *htab;
2551 struct elf_x86_64_link_hash_entry *eh;
2552 struct elf_dyn_relocs *p;
2553 const struct elf_backend_data *bed;
2554 unsigned int plt_entry_size;
2556 if (h->root.type == bfd_link_hash_indirect)
2559 eh = (struct elf_x86_64_link_hash_entry *) h;
2561 info = (struct bfd_link_info *) inf;
2562 htab = elf_x86_64_hash_table (info);
2565 bed = get_elf_backend_data (info->output_bfd);
2566 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2568 /* We can't use the GOT PLT if pointer equality is needed since
2569 finish_dynamic_symbol won't clear symbol value and the dynamic
2570 linker won't update the GOT slot. We will get into an infinite
2571 loop at run-time. */
2572 if (htab->plt_got != NULL
2573 && h->type != STT_GNU_IFUNC
2574 && !h->pointer_equality_needed
2575 && h->plt.refcount > 0
2576 && h->got.refcount > 0)
2578 /* Don't use the regular PLT if there are both GOT and GOTPLT
2580 h->plt.offset = (bfd_vma) -1;
2582 /* Use the GOT PLT. */
2583 eh->plt_got.refcount = 1;
2586 /* Clear the reference count of function pointer relocations if
2587 symbol isn't a normal function. */
2588 if (h->type != STT_FUNC)
2589 eh->func_pointer_refcount = 0;
2591 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2592 here if it is defined and referenced in a non-shared object. */
2593 if (h->type == STT_GNU_IFUNC
2596 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2602 asection *s = htab->plt_bnd;
2603 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2605 /* Use the .plt.bnd section if it is created. */
2606 eh->plt_bnd.offset = s->size;
2608 /* Make room for this entry in the .plt.bnd section. */
2609 s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2617 /* Don't create the PLT entry if there are only function pointer
2618 relocations which can be resolved at run-time. */
2619 else if (htab->elf.dynamic_sections_created
2620 && (h->plt.refcount > eh->func_pointer_refcount
2621 || eh->plt_got.refcount > 0))
2623 bfd_boolean use_plt_got;
2625 /* Clear the reference count of function pointer relocations
2627 eh->func_pointer_refcount = 0;
2629 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2631 /* Don't use the regular PLT for DF_BIND_NOW. */
2632 h->plt.offset = (bfd_vma) -1;
2634 /* Use the GOT PLT. */
2635 h->got.refcount = 1;
2636 eh->plt_got.refcount = 1;
2639 use_plt_got = eh->plt_got.refcount > 0;
2641 /* Make sure this symbol is output as a dynamic symbol.
2642 Undefined weak syms won't yet be marked as dynamic. */
2643 if (h->dynindx == -1
2644 && !h->forced_local)
2646 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2650 if (bfd_link_pic (info)
2651 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2653 asection *s = htab->elf.splt;
2654 asection *bnd_s = htab->plt_bnd;
2655 asection *got_s = htab->plt_got;
2657 /* If this is the first .plt entry, make room for the special
2658 first entry. The .plt section is used by prelink to undo
2659 prelinking for dynamic relocations. */
2661 s->size = plt_entry_size;
2664 eh->plt_got.offset = got_s->size;
2667 h->plt.offset = s->size;
2669 eh->plt_bnd.offset = bnd_s->size;
2672 /* If this symbol is not defined in a regular file, and we are
2673 not generating a shared library, then set the symbol to this
2674 location in the .plt. This is required to make function
2675 pointers compare as equal between the normal executable and
2676 the shared library. */
2677 if (! bfd_link_pic (info)
2682 /* We need to make a call to the entry of the GOT PLT
2683 instead of regular PLT entry. */
2684 h->root.u.def.section = got_s;
2685 h->root.u.def.value = eh->plt_got.offset;
2691 /* We need to make a call to the entry of the second
2692 PLT instead of regular PLT entry. */
2693 h->root.u.def.section = bnd_s;
2694 h->root.u.def.value = eh->plt_bnd.offset;
2698 h->root.u.def.section = s;
2699 h->root.u.def.value = h->plt.offset;
2704 /* Make room for this entry. */
2706 got_s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2709 s->size += plt_entry_size;
2711 bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2713 /* We also need to make an entry in the .got.plt section,
2714 which will be placed in the .got section by the linker
2716 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
2718 /* We also need to make an entry in the .rela.plt
2720 htab->elf.srelplt->size += bed->s->sizeof_rela;
2721 htab->elf.srelplt->reloc_count++;
2726 h->plt.offset = (bfd_vma) -1;
2732 h->plt.offset = (bfd_vma) -1;
2736 eh->tlsdesc_got = (bfd_vma) -1;
2738 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2739 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2740 if (h->got.refcount > 0
2741 && bfd_link_executable (info)
2743 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
2745 h->got.offset = (bfd_vma) -1;
2747 else if (h->got.refcount > 0)
2751 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
2753 /* Make sure this symbol is output as a dynamic symbol.
2754 Undefined weak syms won't yet be marked as dynamic. */
2755 if (h->dynindx == -1
2756 && !h->forced_local)
2758 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2762 if (GOT_TLS_GDESC_P (tls_type))
2764 eh->tlsdesc_got = htab->elf.sgotplt->size
2765 - elf_x86_64_compute_jump_table_size (htab);
2766 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
2767 h->got.offset = (bfd_vma) -2;
2769 if (! GOT_TLS_GDESC_P (tls_type)
2770 || GOT_TLS_GD_P (tls_type))
2773 h->got.offset = s->size;
2774 s->size += GOT_ENTRY_SIZE;
2775 if (GOT_TLS_GD_P (tls_type))
2776 s->size += GOT_ENTRY_SIZE;
2778 dyn = htab->elf.dynamic_sections_created;
2779 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2781 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2782 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2783 || tls_type == GOT_TLS_IE)
2784 htab->elf.srelgot->size += bed->s->sizeof_rela;
2785 else if (GOT_TLS_GD_P (tls_type))
2786 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
2787 else if (! GOT_TLS_GDESC_P (tls_type)
2788 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2789 || h->root.type != bfd_link_hash_undefweak)
2790 && (bfd_link_pic (info)
2791 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2792 htab->elf.srelgot->size += bed->s->sizeof_rela;
2793 if (GOT_TLS_GDESC_P (tls_type))
2795 htab->elf.srelplt->size += bed->s->sizeof_rela;
2796 htab->tlsdesc_plt = (bfd_vma) -1;
2800 h->got.offset = (bfd_vma) -1;
2802 if (eh->dyn_relocs == NULL)
2805 /* In the shared -Bsymbolic case, discard space allocated for
2806 dynamic pc-relative relocs against symbols which turn out to be
2807 defined in regular objects. For the normal shared case, discard
2808 space for pc-relative relocs that have become local due to symbol
2809 visibility changes. */
2811 if (bfd_link_pic (info))
2813 /* Relocs that use pc_count are those that appear on a call
2814 insn, or certain REL relocs that can generated via assembly.
2815 We want calls to protected symbols to resolve directly to the
2816 function rather than going via the plt. If people want
2817 function pointer comparisons to work as expected then they
2818 should avoid writing weird assembly. */
2819 if (SYMBOL_CALLS_LOCAL (info, h))
2821 struct elf_dyn_relocs **pp;
2823 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2825 p->count -= p->pc_count;
2834 /* Also discard relocs on undefined weak syms with non-default
2836 if (eh->dyn_relocs != NULL)
2838 if (h->root.type == bfd_link_hash_undefweak)
2840 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2841 eh->dyn_relocs = NULL;
2843 /* Make sure undefined weak symbols are output as a dynamic
2845 else if (h->dynindx == -1
2846 && ! h->forced_local
2847 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2850 /* For PIE, discard space for pc-relative relocs against
2851 symbols which turn out to need copy relocs. */
2852 else if (bfd_link_executable (info)
2853 && (h->needs_copy || eh->needs_copy)
2857 struct elf_dyn_relocs **pp;
2859 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2861 if (p->pc_count != 0)
2869 else if (ELIMINATE_COPY_RELOCS)
2871 /* For the non-shared case, discard space for relocs against
2872 symbols which turn out to need copy relocs or are not
2873 dynamic. Keep dynamic relocations for run-time function
2874 pointer initialization. */
2876 if ((!h->non_got_ref || eh->func_pointer_refcount > 0)
2879 || (htab->elf.dynamic_sections_created
2880 && (h->root.type == bfd_link_hash_undefweak
2881 || h->root.type == bfd_link_hash_undefined))))
2883 /* Make sure this symbol is output as a dynamic symbol.
2884 Undefined weak syms won't yet be marked as dynamic. */
2885 if (h->dynindx == -1
2886 && ! h->forced_local
2887 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2890 /* If that succeeded, we know we'll be keeping all the
2892 if (h->dynindx != -1)
2896 eh->dyn_relocs = NULL;
2897 eh->func_pointer_refcount = 0;
2902 /* Finally, allocate space. */
2903 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2907 sreloc = elf_section_data (p->sec)->sreloc;
2909 BFD_ASSERT (sreloc != NULL);
2911 sreloc->size += p->count * bed->s->sizeof_rela;
2917 /* Allocate space in .plt, .got and associated reloc sections for
2918 local dynamic relocs. */
2921 elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
2923 struct elf_link_hash_entry *h
2924 = (struct elf_link_hash_entry *) *slot;
2926 if (h->type != STT_GNU_IFUNC
2930 || h->root.type != bfd_link_hash_defined)
2933 return elf_x86_64_allocate_dynrelocs (h, inf);
2936 /* Find any dynamic relocs that apply to read-only sections. */
2939 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2942 struct elf_x86_64_link_hash_entry *eh;
2943 struct elf_dyn_relocs *p;
2945 /* Skip local IFUNC symbols. */
2946 if (h->forced_local && h->type == STT_GNU_IFUNC)
2949 eh = (struct elf_x86_64_link_hash_entry *) h;
2950 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2952 asection *s = p->sec->output_section;
2954 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2956 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2958 info->flags |= DF_TEXTREL;
2960 if ((info->warn_shared_textrel && bfd_link_pic (info))
2961 || info->error_textrel)
2962 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2963 p->sec->owner, h->root.root.string,
2966 /* Not an error, just cut short the traversal. */
2973 /* With the local symbol, foo, we convert
2974 mov foo@GOTPCREL(%rip), %reg
2978 call/jmp *foo@GOTPCREL(%rip)
2980 nop call foo/jmp foo nop
2981 When PIC is false, convert
2982 test %reg, foo@GOTPCREL(%rip)
2986 binop foo@GOTPCREL(%rip), %reg
2989 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
2993 elf_x86_64_convert_load (bfd *abfd, asection *sec,
2994 struct bfd_link_info *link_info)
2996 Elf_Internal_Shdr *symtab_hdr;
2997 Elf_Internal_Rela *internal_relocs;
2998 Elf_Internal_Rela *irel, *irelend;
3000 struct elf_x86_64_link_hash_table *htab;
3001 bfd_boolean changed_contents;
3002 bfd_boolean changed_relocs;
3003 bfd_signed_vma *local_got_refcounts;
3004 bfd_vma maxpagesize;
3006 /* Don't even try to convert non-ELF outputs. */
3007 if (!is_elf_hash_table (link_info->hash))
3010 /* Nothing to do if there is no need or no output. */
3011 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
3012 || sec->need_convert_load == 0
3013 || bfd_is_abs_section (sec->output_section))
3016 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3018 /* Load the relocations for this section. */
3019 internal_relocs = (_bfd_elf_link_read_relocs
3020 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3021 link_info->keep_memory));
3022 if (internal_relocs == NULL)
3025 htab = elf_x86_64_hash_table (link_info);
3026 changed_contents = FALSE;
3027 changed_relocs = FALSE;
3028 local_got_refcounts = elf_local_got_refcounts (abfd);
3029 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3031 /* Get the section contents. */
3032 if (elf_section_data (sec)->this_hdr.contents != NULL)
3033 contents = elf_section_data (sec)->this_hdr.contents;
3036 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3040 irelend = internal_relocs + sec->reloc_count;
3041 for (irel = internal_relocs; irel < irelend; irel++)
3043 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3044 unsigned int r_symndx = htab->r_sym (irel->r_info);
3046 struct elf_link_hash_entry *h;
3050 bfd_signed_vma raddend;
3051 unsigned int opcode;
3054 if (r_type != R_X86_64_GOTPCREL
3055 && r_type != R_X86_64_GOTPCRELX
3056 && r_type != R_X86_64_REX_GOTPCRELX)
3059 roff = irel->r_offset;
3060 if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))
3063 raddend = irel->r_addend;
3064 /* Addend for 32-bit PC-relative relocation must be -4. */
3068 opcode = bfd_get_8 (abfd, contents + roff - 2);
3070 /* It is OK to convert mov to lea. */
3073 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
3074 for mov call, jmp or one of adc, add, and, cmp, or, sbb,
3075 sub, test, xor instructions. */
3076 if (r_type != R_X86_64_GOTPCRELX
3077 && r_type != R_X86_64_REX_GOTPCRELX)
3080 /* It is OK to convert indirect branch to direct branch. */
3083 /* It is OK to convert adc, add, and, cmp, or, sbb, sub,
3084 test, xor only when PIC is false. */
3085 if (bfd_link_pic (link_info))
3090 /* Get the symbol referred to by the reloc. */
3091 if (r_symndx < symtab_hdr->sh_info)
3093 Elf_Internal_Sym *isym;
3095 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3098 symtype = ELF_ST_TYPE (isym->st_info);
3100 /* STT_GNU_IFUNC must keep GOTPCREL relocations and skip
3101 relocation against undefined symbols. */
3102 if (symtype == STT_GNU_IFUNC || isym->st_shndx == SHN_UNDEF)
3105 if (isym->st_shndx == SHN_ABS)
3106 tsec = bfd_abs_section_ptr;
3107 else if (isym->st_shndx == SHN_COMMON)
3108 tsec = bfd_com_section_ptr;
3109 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
3110 tsec = &_bfd_elf_large_com_section;
3112 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3115 toff = isym->st_value;
3119 indx = r_symndx - symtab_hdr->sh_info;
3120 h = elf_sym_hashes (abfd)[indx];
3121 BFD_ASSERT (h != NULL);
3123 while (h->root.type == bfd_link_hash_indirect
3124 || h->root.type == bfd_link_hash_warning)
3125 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3127 /* STT_GNU_IFUNC must keep GOTPCREL relocations. We also
3128 avoid optimizing GOTPCREL relocations againt _DYNAMIC
3129 since ld.so may use its link-time address. */
3131 || h->root.type == bfd_link_hash_defined
3132 || h->root.type == bfd_link_hash_defweak)
3133 && h->type != STT_GNU_IFUNC
3134 && h != htab->elf.hdynamic
3135 && SYMBOL_REFERENCES_LOCAL (link_info, h))
3137 /* bfd_link_hash_new or bfd_link_hash_undefined is
3138 set by an assignment in a linker script in
3139 bfd_elf_record_link_assignment. FIXME: If we
3140 ever get a linker error due relocation overflow,
3141 we will skip this optimization. */
3143 && (h->root.type == bfd_link_hash_new
3144 || h->root.type == bfd_link_hash_undefined))
3146 tsec = h->root.u.def.section;
3147 toff = h->root.u.def.value;
3154 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
3156 /* At this stage in linking, no SEC_MERGE symbol has been
3157 adjusted, so all references to such symbols need to be
3158 passed through _bfd_merged_section_offset. (Later, in
3159 relocate_section, all SEC_MERGE symbols *except* for
3160 section symbols have been adjusted.)
3162 gas may reduce relocations against symbols in SEC_MERGE
3163 sections to a relocation against the section symbol when
3164 the original addend was zero. When the reloc is against
3165 a section symbol we should include the addend in the
3166 offset passed to _bfd_merged_section_offset, since the
3167 location of interest is the original symbol. On the
3168 other hand, an access to "sym+addend" where "sym" is not
3169 a section symbol should not include the addend; Such an
3170 access is presumed to be an offset from "sym"; The
3171 location of interest is just "sym". */
3172 if (symtype == STT_SECTION)
3175 toff = _bfd_merged_section_offset (abfd, &tsec,
3176 elf_section_data (tsec)->sec_info,
3179 if (symtype != STT_SECTION)
3185 /* Don't convert if R_X86_64_PC32 relocation overflows. */
3186 if (tsec->output_section == sec->output_section)
3188 if ((toff - roff + 0x80000000) > 0xffffffff)
3196 /* At this point, we don't know the load addresses of TSEC
3197 section nor SEC section. We estimate the distrance between
3200 for (asect = sec->output_section;
3201 asect != NULL && asect != tsec->output_section;
3202 asect = asect->next)
3205 for (i = asect->output_section->map_head.s;
3209 size = align_power (size, i->alignment_power);
3214 /* Don't convert GOTPCREL relocations if TSEC isn't placed
3219 /* Take PT_GNU_RELRO segment into account by adding
3221 if ((toff + size + maxpagesize - roff + 0x80000000)
3229 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
3234 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
3236 modrm = bfd_get_8 (abfd, contents + roff - 1);
3239 /* Convert to "jmp foo nop". */
3242 nop_offset = irel->r_offset + 3;
3243 disp = bfd_get_32 (abfd, contents + irel->r_offset);
3244 irel->r_offset -= 1;
3245 bfd_put_32 (abfd, disp, contents + irel->r_offset);
3249 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
3252 nop = link_info->call_nop_byte;
3253 if (link_info->call_nop_as_suffix)
3255 nop_offset = irel->r_offset + 3;
3256 disp = bfd_get_32 (abfd, contents + irel->r_offset);
3257 irel->r_offset -= 1;
3258 bfd_put_32 (abfd, disp, contents + irel->r_offset);
3261 nop_offset = irel->r_offset - 2;
3263 bfd_put_8 (abfd, nop, contents + nop_offset);
3264 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
3265 r_type = R_X86_64_PC32;
3271 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
3272 "lea foo(%rip), %reg". */
3274 r_type = R_X86_64_PC32;
3278 modrm = bfd_get_8 (abfd, contents + roff - 1);
3281 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
3282 "test $foo, %reg". */
3283 modrm = 0xc0 | (modrm & 0x38) >> 3;
3288 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
3289 "binop $foo, %reg". */
3290 modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c);
3293 bfd_put_8 (abfd, modrm, contents + roff - 1);
3295 if (r_type == R_X86_64_REX_GOTPCRELX)
3297 /* Move the R bit to the B bit in REX byte. */
3298 unsigned int rex = bfd_get_8 (abfd, contents + roff - 3);
3299 rex = (rex & ~REX_R) | (rex & REX_R) >> 2;
3300 bfd_put_8 (abfd, rex, contents + roff - 3);
3302 /* No addend for R_X86_64_32S relocation. */
3304 r_type = R_X86_64_32S;
3307 bfd_put_8 (abfd, opcode, contents + roff - 2);
3310 irel->r_info = htab->r_info (r_symndx, r_type);
3311 changed_contents = TRUE;
3312 changed_relocs = TRUE;
3316 if (h->got.refcount > 0)
3317 h->got.refcount -= 1;
3321 if (local_got_refcounts != NULL
3322 && local_got_refcounts[r_symndx] > 0)
3323 local_got_refcounts[r_symndx] -= 1;
3327 if (contents != NULL
3328 && elf_section_data (sec)->this_hdr.contents != contents)
3330 if (!changed_contents && !link_info->keep_memory)
3334 /* Cache the section contents for elf_link_input_bfd. */
3335 elf_section_data (sec)->this_hdr.contents = contents;
3339 if (elf_section_data (sec)->relocs != internal_relocs)
3341 if (!changed_relocs)
3342 free (internal_relocs);
3344 elf_section_data (sec)->relocs = internal_relocs;
3350 if (contents != NULL
3351 && elf_section_data (sec)->this_hdr.contents != contents)
3353 if (internal_relocs != NULL
3354 && elf_section_data (sec)->relocs != internal_relocs)
3355 free (internal_relocs);
3359 /* Set the sizes of the dynamic sections. */
3362 elf_x86_64_size_dynamic_sections (bfd *output_bfd,
3363 struct bfd_link_info *info)
3365 struct elf_x86_64_link_hash_table *htab;
3370 const struct elf_backend_data *bed;
3372 htab = elf_x86_64_hash_table (info);
3375 bed = get_elf_backend_data (output_bfd);
3377 dynobj = htab->elf.dynobj;
3381 if (htab->elf.dynamic_sections_created)
3383 /* Set the contents of the .interp section to the interpreter. */
3384 if (bfd_link_executable (info) && !info->nointerp)
3386 s = bfd_get_linker_section (dynobj, ".interp");
3389 s->size = htab->dynamic_interpreter_size;
3390 s->contents = (unsigned char *) htab->dynamic_interpreter;
3394 /* Set up .got offsets for local syms, and space for local dynamic
3396 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3398 bfd_signed_vma *local_got;
3399 bfd_signed_vma *end_local_got;
3400 char *local_tls_type;
3401 bfd_vma *local_tlsdesc_gotent;
3402 bfd_size_type locsymcount;
3403 Elf_Internal_Shdr *symtab_hdr;
3406 if (! is_x86_64_elf (ibfd))
3409 for (s = ibfd->sections; s != NULL; s = s->next)
3411 struct elf_dyn_relocs *p;
3413 if (!elf_x86_64_convert_load (ibfd, s, info))
3416 for (p = (struct elf_dyn_relocs *)
3417 (elf_section_data (s)->local_dynrel);
3421 if (!bfd_is_abs_section (p->sec)
3422 && bfd_is_abs_section (p->sec->output_section))
3424 /* Input section has been discarded, either because
3425 it is a copy of a linkonce section or due to
3426 linker script /DISCARD/, so we'll be discarding
3429 else if (p->count != 0)
3431 srel = elf_section_data (p->sec)->sreloc;
3432 srel->size += p->count * bed->s->sizeof_rela;
3433 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3434 && (info->flags & DF_TEXTREL) == 0)
3436 info->flags |= DF_TEXTREL;
3437 if ((info->warn_shared_textrel && bfd_link_pic (info))
3438 || info->error_textrel)
3439 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3440 p->sec->owner, p->sec);
3446 local_got = elf_local_got_refcounts (ibfd);
3450 symtab_hdr = &elf_symtab_hdr (ibfd);
3451 locsymcount = symtab_hdr->sh_info;
3452 end_local_got = local_got + locsymcount;
3453 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
3454 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
3456 srel = htab->elf.srelgot;
3457 for (; local_got < end_local_got;
3458 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3460 *local_tlsdesc_gotent = (bfd_vma) -1;
3463 if (GOT_TLS_GDESC_P (*local_tls_type))
3465 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3466 - elf_x86_64_compute_jump_table_size (htab);
3467 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3468 *local_got = (bfd_vma) -2;
3470 if (! GOT_TLS_GDESC_P (*local_tls_type)
3471 || GOT_TLS_GD_P (*local_tls_type))
3473 *local_got = s->size;
3474 s->size += GOT_ENTRY_SIZE;
3475 if (GOT_TLS_GD_P (*local_tls_type))
3476 s->size += GOT_ENTRY_SIZE;
3478 if (bfd_link_pic (info)
3479 || GOT_TLS_GD_ANY_P (*local_tls_type)
3480 || *local_tls_type == GOT_TLS_IE)
3482 if (GOT_TLS_GDESC_P (*local_tls_type))
3484 htab->elf.srelplt->size
3485 += bed->s->sizeof_rela;
3486 htab->tlsdesc_plt = (bfd_vma) -1;
3488 if (! GOT_TLS_GDESC_P (*local_tls_type)
3489 || GOT_TLS_GD_P (*local_tls_type))
3490 srel->size += bed->s->sizeof_rela;
3494 *local_got = (bfd_vma) -1;
3498 if (htab->tls_ld_got.refcount > 0)
3500 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3502 htab->tls_ld_got.offset = htab->elf.sgot->size;
3503 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
3504 htab->elf.srelgot->size += bed->s->sizeof_rela;
3507 htab->tls_ld_got.offset = -1;
3509 /* Allocate global sym .plt and .got entries, and space for global
3510 sym dynamic relocs. */
3511 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
3514 /* Allocate .plt and .got entries, and space for local symbols. */
3515 htab_traverse (htab->loc_hash_table,
3516 elf_x86_64_allocate_local_dynrelocs,
3519 /* For every jump slot reserved in the sgotplt, reloc_count is
3520 incremented. However, when we reserve space for TLS descriptors,
3521 it's not incremented, so in order to compute the space reserved
3522 for them, it suffices to multiply the reloc count by the jump
3525 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3526 so that R_X86_64_IRELATIVE entries come last. */
3527 if (htab->elf.srelplt)
3529 htab->sgotplt_jump_table_size
3530 = elf_x86_64_compute_jump_table_size (htab);
3531 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3533 else if (htab->elf.irelplt)
3534 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3536 if (htab->tlsdesc_plt)
3538 /* If we're not using lazy TLS relocations, don't generate the
3539 PLT and GOT entries they require. */
3540 if ((info->flags & DF_BIND_NOW))
3541 htab->tlsdesc_plt = 0;
3544 htab->tlsdesc_got = htab->elf.sgot->size;
3545 htab->elf.sgot->size += GOT_ENTRY_SIZE;
3546 /* Reserve room for the initial entry.
3547 FIXME: we could probably do away with it in this case. */
3548 if (htab->elf.splt->size == 0)
3549 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
3550 htab->tlsdesc_plt = htab->elf.splt->size;
3551 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
3555 if (htab->elf.sgotplt)
3557 /* Don't allocate .got.plt section if there are no GOT nor PLT
3558 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3559 if ((htab->elf.hgot == NULL
3560 || !htab->elf.hgot->ref_regular_nonweak)
3561 && (htab->elf.sgotplt->size
3562 == get_elf_backend_data (output_bfd)->got_header_size)
3563 && (htab->elf.splt == NULL
3564 || htab->elf.splt->size == 0)
3565 && (htab->elf.sgot == NULL
3566 || htab->elf.sgot->size == 0)
3567 && (htab->elf.iplt == NULL
3568 || htab->elf.iplt->size == 0)
3569 && (htab->elf.igotplt == NULL
3570 || htab->elf.igotplt->size == 0))
3571 htab->elf.sgotplt->size = 0;
3574 if (htab->plt_eh_frame != NULL
3575 && htab->elf.splt != NULL
3576 && htab->elf.splt->size != 0
3577 && !bfd_is_abs_section (htab->elf.splt->output_section)
3578 && _bfd_elf_eh_frame_present (info))
3580 const struct elf_x86_64_backend_data *arch_data
3581 = get_elf_x86_64_arch_data (bed);
3582 htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
3585 /* We now have determined the sizes of the various dynamic sections.
3586 Allocate memory for them. */
3588 for (s = dynobj->sections; s != NULL; s = s->next)
3590 if ((s->flags & SEC_LINKER_CREATED) == 0)
3593 if (s == htab->elf.splt
3594 || s == htab->elf.sgot
3595 || s == htab->elf.sgotplt
3596 || s == htab->elf.iplt
3597 || s == htab->elf.igotplt
3598 || s == htab->plt_bnd
3599 || s == htab->plt_got
3600 || s == htab->plt_eh_frame
3601 || s == htab->sdynbss)
3603 /* Strip this section if we don't need it; see the
3606 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
3608 if (s->size != 0 && s != htab->elf.srelplt)
3611 /* We use the reloc_count field as a counter if we need
3612 to copy relocs into the output file. */
3613 if (s != htab->elf.srelplt)
3618 /* It's not one of our sections, so don't allocate space. */
3624 /* If we don't need this section, strip it from the
3625 output file. This is mostly to handle .rela.bss and
3626 .rela.plt. We must create both sections in
3627 create_dynamic_sections, because they must be created
3628 before the linker maps input sections to output
3629 sections. The linker does that before
3630 adjust_dynamic_symbol is called, and it is that
3631 function which decides whether anything needs to go
3632 into these sections. */
3634 s->flags |= SEC_EXCLUDE;
3638 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3641 /* Allocate memory for the section contents. We use bfd_zalloc
3642 here in case unused entries are not reclaimed before the
3643 section's contents are written out. This should not happen,
3644 but this way if it does, we get a R_X86_64_NONE reloc instead
3646 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3647 if (s->contents == NULL)
3651 if (htab->plt_eh_frame != NULL
3652 && htab->plt_eh_frame->contents != NULL)
3654 const struct elf_x86_64_backend_data *arch_data
3655 = get_elf_x86_64_arch_data (bed);
3657 memcpy (htab->plt_eh_frame->contents,
3658 arch_data->eh_frame_plt, htab->plt_eh_frame->size);
3659 bfd_put_32 (dynobj, htab->elf.splt->size,
3660 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3663 if (htab->elf.dynamic_sections_created)
3665 /* Add some entries to the .dynamic section. We fill in the
3666 values later, in elf_x86_64_finish_dynamic_sections, but we
3667 must add the entries now so that we get the correct size for
3668 the .dynamic section. The DT_DEBUG entry is filled in by the
3669 dynamic linker and used by the debugger. */
3670 #define add_dynamic_entry(TAG, VAL) \
3671 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3673 if (bfd_link_executable (info))
3675 if (!add_dynamic_entry (DT_DEBUG, 0))
3679 if (htab->elf.splt->size != 0)
3681 /* DT_PLTGOT is used by prelink even if there is no PLT
3683 if (!add_dynamic_entry (DT_PLTGOT, 0))
3686 if (htab->elf.srelplt->size != 0)
3688 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3689 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3690 || !add_dynamic_entry (DT_JMPREL, 0))
3694 if (htab->tlsdesc_plt
3695 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3696 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3702 if (!add_dynamic_entry (DT_RELA, 0)
3703 || !add_dynamic_entry (DT_RELASZ, 0)
3704 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
3707 /* If any dynamic relocs apply to a read-only section,
3708 then we need a DT_TEXTREL entry. */
3709 if ((info->flags & DF_TEXTREL) == 0)
3710 elf_link_hash_traverse (&htab->elf,
3711 elf_x86_64_readonly_dynrelocs,
3714 if ((info->flags & DF_TEXTREL) != 0)
3716 if ((elf_tdata (output_bfd)->has_gnu_symbols
3717 & elf_gnu_symbol_ifunc) == elf_gnu_symbol_ifunc)
3719 info->callbacks->einfo
3720 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3721 bfd_set_error (bfd_error_bad_value);
3725 if (!add_dynamic_entry (DT_TEXTREL, 0))
3730 #undef add_dynamic_entry
3736 elf_x86_64_always_size_sections (bfd *output_bfd,
3737 struct bfd_link_info *info)
3739 asection *tls_sec = elf_hash_table (info)->tls_sec;
3743 struct elf_link_hash_entry *tlsbase;
3745 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3746 "_TLS_MODULE_BASE_",
3747 FALSE, FALSE, FALSE);
3749 if (tlsbase && tlsbase->type == STT_TLS)
3751 struct elf_x86_64_link_hash_table *htab;
3752 struct bfd_link_hash_entry *bh = NULL;
3753 const struct elf_backend_data *bed
3754 = get_elf_backend_data (output_bfd);
3756 htab = elf_x86_64_hash_table (info);
3760 if (!(_bfd_generic_link_add_one_symbol
3761 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3762 tls_sec, 0, NULL, FALSE,
3763 bed->collect, &bh)))
3766 htab->tls_module_base = bh;
3768 tlsbase = (struct elf_link_hash_entry *)bh;
3769 tlsbase->def_regular = 1;
3770 tlsbase->other = STV_HIDDEN;
3771 tlsbase->root.linker_def = 1;
3772 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3779 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3780 executables. Rather than setting it to the beginning of the TLS
3781 section, we have to set it to the end. This function may be called
3782 multiple times, it is idempotent. */
3785 elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
3787 struct elf_x86_64_link_hash_table *htab;
3788 struct bfd_link_hash_entry *base;
3790 if (!bfd_link_executable (info))
3793 htab = elf_x86_64_hash_table (info);
3797 base = htab->tls_module_base;
3801 base->u.def.value = htab->elf.tls_size;
3804 /* Return the base VMA address which should be subtracted from real addresses
3805 when resolving @dtpoff relocation.
3806 This is PT_TLS segment p_vaddr. */
3809 elf_x86_64_dtpoff_base (struct bfd_link_info *info)
3811 /* If tls_sec is NULL, we should have signalled an error already. */
3812 if (elf_hash_table (info)->tls_sec == NULL)
3814 return elf_hash_table (info)->tls_sec->vma;
3817 /* Return the relocation value for @tpoff relocation
3818 if STT_TLS virtual address is ADDRESS. */
3821 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
3823 struct elf_link_hash_table *htab = elf_hash_table (info);
3824 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3825 bfd_vma static_tls_size;
3827 /* If tls_segment is NULL, we should have signalled an error already. */
3828 if (htab->tls_sec == NULL)
3831 /* Consider special static TLS alignment requirements. */
3832 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3833 return address - static_tls_size - htab->tls_sec->vma;
3836 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3840 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3842 /* Opcode Instruction
3845 0x0f 0x8x conditional jump */
3847 && (contents [offset - 1] == 0xe8
3848 || contents [offset - 1] == 0xe9))
3850 && contents [offset - 2] == 0x0f
3851 && (contents [offset - 1] & 0xf0) == 0x80));
3854 /* Relocate an x86_64 ELF section. */
3857 elf_x86_64_relocate_section (bfd *output_bfd,
3858 struct bfd_link_info *info,
3860 asection *input_section,
3862 Elf_Internal_Rela *relocs,
3863 Elf_Internal_Sym *local_syms,
3864 asection **local_sections)
3866 struct elf_x86_64_link_hash_table *htab;
3867 Elf_Internal_Shdr *symtab_hdr;
3868 struct elf_link_hash_entry **sym_hashes;
3869 bfd_vma *local_got_offsets;
3870 bfd_vma *local_tlsdesc_gotents;
3871 Elf_Internal_Rela *rel;
3872 Elf_Internal_Rela *wrel;
3873 Elf_Internal_Rela *relend;
3874 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
3876 BFD_ASSERT (is_x86_64_elf (input_bfd));
3878 htab = elf_x86_64_hash_table (info);
3881 symtab_hdr = &elf_symtab_hdr (input_bfd);
3882 sym_hashes = elf_sym_hashes (input_bfd);
3883 local_got_offsets = elf_local_got_offsets (input_bfd);
3884 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
3886 elf_x86_64_set_tls_module_base (info);
3888 rel = wrel = relocs;
3889 relend = relocs + input_section->reloc_count;
3890 for (; rel < relend; wrel++, rel++)
3892 unsigned int r_type;
3893 reloc_howto_type *howto;
3894 unsigned long r_symndx;
3895 struct elf_link_hash_entry *h;
3896 struct elf_x86_64_link_hash_entry *eh;
3897 Elf_Internal_Sym *sym;
3899 bfd_vma off, offplt, plt_offset;
3901 bfd_boolean unresolved_reloc;
3902 bfd_reloc_status_type r;
3904 asection *base_got, *resolved_plt;
3907 r_type = ELF32_R_TYPE (rel->r_info);
3908 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3909 || r_type == (int) R_X86_64_GNU_VTENTRY)
3916 if (r_type >= (int) R_X86_64_standard)
3918 (*_bfd_error_handler)
3919 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3920 input_bfd, input_section, r_type);
3921 bfd_set_error (bfd_error_bad_value);
3925 if (r_type != (int) R_X86_64_32
3926 || ABI_64_P (output_bfd))
3927 howto = x86_64_elf_howto_table + r_type;
3929 howto = (x86_64_elf_howto_table
3930 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
3931 r_symndx = htab->r_sym (rel->r_info);
3935 unresolved_reloc = FALSE;
3936 if (r_symndx < symtab_hdr->sh_info)
3938 sym = local_syms + r_symndx;
3939 sec = local_sections[r_symndx];
3941 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3943 st_size = sym->st_size;
3945 /* Relocate against local STT_GNU_IFUNC symbol. */
3946 if (!bfd_link_relocatable (info)
3947 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3949 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
3954 /* Set STT_GNU_IFUNC symbol value. */
3955 h->root.u.def.value = sym->st_value;
3956 h->root.u.def.section = sec;
3961 bfd_boolean warned ATTRIBUTE_UNUSED;
3962 bfd_boolean ignored ATTRIBUTE_UNUSED;
3964 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3965 r_symndx, symtab_hdr, sym_hashes,
3967 unresolved_reloc, warned, ignored);
3971 if (sec != NULL && discarded_section (sec))
3973 _bfd_clear_contents (howto, input_bfd, input_section,
3974 contents + rel->r_offset);
3975 wrel->r_offset = rel->r_offset;
3979 /* For ld -r, remove relocations in debug sections against
3980 sections defined in discarded sections. Not done for
3981 eh_frame editing code expects to be present. */
3982 if (bfd_link_relocatable (info)
3983 && (input_section->flags & SEC_DEBUGGING))
3989 if (bfd_link_relocatable (info))
3996 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
3998 if (r_type == R_X86_64_64)
4000 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
4001 zero-extend it to 64bit if addend is zero. */
4002 r_type = R_X86_64_32;
4003 memset (contents + rel->r_offset + 4, 0, 4);
4005 else if (r_type == R_X86_64_SIZE64)
4007 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
4008 zero-extend it to 64bit if addend is zero. */
4009 r_type = R_X86_64_SIZE32;
4010 memset (contents + rel->r_offset + 4, 0, 4);
4014 eh = (struct elf_x86_64_link_hash_entry *) h;
4016 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4017 it here if it is defined in a non-shared object. */
4019 && h->type == STT_GNU_IFUNC
4025 if ((input_section->flags & SEC_ALLOC) == 0)
4027 /* Dynamic relocs are not propagated for SEC_DEBUGGING
4028 sections because such sections are not SEC_ALLOC and
4029 thus ld.so will not process them. */
4030 if ((input_section->flags & SEC_DEBUGGING) != 0)
4034 else if (h->plt.offset == (bfd_vma) -1)
4037 /* STT_GNU_IFUNC symbol must go through PLT. */
4038 if (htab->elf.splt != NULL)
4040 if (htab->plt_bnd != NULL)
4042 resolved_plt = htab->plt_bnd;
4043 plt_offset = eh->plt_bnd.offset;
4047 resolved_plt = htab->elf.splt;
4048 plt_offset = h->plt.offset;
4053 resolved_plt = htab->elf.iplt;
4054 plt_offset = h->plt.offset;
4057 relocation = (resolved_plt->output_section->vma
4058 + resolved_plt->output_offset + plt_offset);
4063 if (h->root.root.string)
4064 name = h->root.root.string;
4066 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4068 (*_bfd_error_handler)
4069 (_("%B: relocation %s against STT_GNU_IFUNC "
4070 "symbol `%s' isn't handled by %s"), input_bfd,
4071 x86_64_elf_howto_table[r_type].name,
4072 name, __FUNCTION__);
4073 bfd_set_error (bfd_error_bad_value);
4077 if (bfd_link_pic (info))
4082 if (ABI_64_P (output_bfd))
4086 if (rel->r_addend != 0)
4088 if (h->root.root.string)
4089 name = h->root.root.string;
4091 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4093 (*_bfd_error_handler)
4094 (_("%B: relocation %s against STT_GNU_IFUNC "
4095 "symbol `%s' has non-zero addend: %d"),
4096 input_bfd, x86_64_elf_howto_table[r_type].name,
4097 name, rel->r_addend);
4098 bfd_set_error (bfd_error_bad_value);
4102 /* Generate dynamic relcoation only when there is a
4103 non-GOT reference in a shared object. */
4104 if (bfd_link_pic (info) && h->non_got_ref)
4106 Elf_Internal_Rela outrel;
4109 /* Need a dynamic relocation to get the real function
4111 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4115 if (outrel.r_offset == (bfd_vma) -1
4116 || outrel.r_offset == (bfd_vma) -2)
4119 outrel.r_offset += (input_section->output_section->vma
4120 + input_section->output_offset);
4122 if (h->dynindx == -1
4124 || bfd_link_executable (info))
4126 /* This symbol is resolved locally. */
4127 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4128 outrel.r_addend = (h->root.u.def.value
4129 + h->root.u.def.section->output_section->vma
4130 + h->root.u.def.section->output_offset);
4134 outrel.r_info = htab->r_info (h->dynindx, r_type);
4135 outrel.r_addend = 0;
4138 sreloc = htab->elf.irelifunc;
4139 elf_append_rela (output_bfd, sreloc, &outrel);
4141 /* If this reloc is against an external symbol, we
4142 do not want to fiddle with the addend. Otherwise,
4143 we need to include the symbol value so that it
4144 becomes an addend for the dynamic reloc. For an
4145 internal symbol, we have updated addend. */
4150 case R_X86_64_PC32_BND:
4152 case R_X86_64_PLT32:
4153 case R_X86_64_PLT32_BND:
4156 case R_X86_64_GOTPCREL:
4157 case R_X86_64_GOTPCRELX:
4158 case R_X86_64_REX_GOTPCRELX:
4159 case R_X86_64_GOTPCREL64:
4160 base_got = htab->elf.sgot;
4161 off = h->got.offset;
4163 if (base_got == NULL)
4166 if (off == (bfd_vma) -1)
4168 /* We can't use h->got.offset here to save state, or
4169 even just remember the offset, as finish_dynamic_symbol
4170 would use that as offset into .got. */
4172 if (htab->elf.splt != NULL)
4174 plt_index = h->plt.offset / plt_entry_size - 1;
4175 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4176 base_got = htab->elf.sgotplt;
4180 plt_index = h->plt.offset / plt_entry_size;
4181 off = plt_index * GOT_ENTRY_SIZE;
4182 base_got = htab->elf.igotplt;
4185 if (h->dynindx == -1
4189 /* This references the local defitionion. We must
4190 initialize this entry in the global offset table.
4191 Since the offset must always be a multiple of 8,
4192 we use the least significant bit to record
4193 whether we have initialized it already.
4195 When doing a dynamic link, we create a .rela.got
4196 relocation entry to initialize the value. This
4197 is done in the finish_dynamic_symbol routine. */
4202 bfd_put_64 (output_bfd, relocation,
4203 base_got->contents + off);
4204 /* Note that this is harmless for the GOTPLT64
4205 case, as -1 | 1 still is -1. */
4211 relocation = (base_got->output_section->vma
4212 + base_got->output_offset + off);
4218 /* When generating a shared object, the relocations handled here are
4219 copied into the output file to be resolved at run time. */
4222 case R_X86_64_GOT32:
4223 case R_X86_64_GOT64:
4224 /* Relocation is to the entry for this symbol in the global
4226 case R_X86_64_GOTPCREL:
4227 case R_X86_64_GOTPCRELX:
4228 case R_X86_64_REX_GOTPCRELX:
4229 case R_X86_64_GOTPCREL64:
4230 /* Use global offset table entry as symbol value. */
4231 case R_X86_64_GOTPLT64:
4232 /* This is obsolete and treated the the same as GOT64. */
4233 base_got = htab->elf.sgot;
4235 if (htab->elf.sgot == NULL)
4242 off = h->got.offset;
4244 && h->plt.offset != (bfd_vma)-1
4245 && off == (bfd_vma)-1)
4247 /* We can't use h->got.offset here to save
4248 state, or even just remember the offset, as
4249 finish_dynamic_symbol would use that as offset into
4251 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
4252 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4253 base_got = htab->elf.sgotplt;
4256 dyn = htab->elf.dynamic_sections_created;
4258 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
4259 || (bfd_link_pic (info)
4260 && SYMBOL_REFERENCES_LOCAL (info, h))
4261 || (ELF_ST_VISIBILITY (h->other)
4262 && h->root.type == bfd_link_hash_undefweak))
4264 /* This is actually a static link, or it is a -Bsymbolic
4265 link and the symbol is defined locally, or the symbol
4266 was forced to be local because of a version file. We
4267 must initialize this entry in the global offset table.
4268 Since the offset must always be a multiple of 8, we
4269 use the least significant bit to record whether we
4270 have initialized it already.
4272 When doing a dynamic link, we create a .rela.got
4273 relocation entry to initialize the value. This is
4274 done in the finish_dynamic_symbol routine. */
4279 bfd_put_64 (output_bfd, relocation,
4280 base_got->contents + off);
4281 /* Note that this is harmless for the GOTPLT64 case,
4282 as -1 | 1 still is -1. */
4287 unresolved_reloc = FALSE;
4291 if (local_got_offsets == NULL)
4294 off = local_got_offsets[r_symndx];
4296 /* The offset must always be a multiple of 8. We use
4297 the least significant bit to record whether we have
4298 already generated the necessary reloc. */
4303 bfd_put_64 (output_bfd, relocation,
4304 base_got->contents + off);
4306 if (bfd_link_pic (info))
4309 Elf_Internal_Rela outrel;
4311 /* We need to generate a R_X86_64_RELATIVE reloc
4312 for the dynamic linker. */
4313 s = htab->elf.srelgot;
4317 outrel.r_offset = (base_got->output_section->vma
4318 + base_got->output_offset
4320 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4321 outrel.r_addend = relocation;
4322 elf_append_rela (output_bfd, s, &outrel);
4325 local_got_offsets[r_symndx] |= 1;
4329 if (off >= (bfd_vma) -2)
4332 relocation = base_got->output_section->vma
4333 + base_got->output_offset + off;
4334 if (r_type != R_X86_64_GOTPCREL
4335 && r_type != R_X86_64_GOTPCRELX
4336 && r_type != R_X86_64_REX_GOTPCRELX
4337 && r_type != R_X86_64_GOTPCREL64)
4338 relocation -= htab->elf.sgotplt->output_section->vma
4339 - htab->elf.sgotplt->output_offset;
4343 case R_X86_64_GOTOFF64:
4344 /* Relocation is relative to the start of the global offset
4347 /* Check to make sure it isn't a protected function or data
4348 symbol for shared library since it may not be local when
4349 used as function address or with copy relocation. We also
4350 need to make sure that a symbol is referenced locally. */
4351 if (bfd_link_pic (info) && h)
4353 if (!h->def_regular)
4357 switch (ELF_ST_VISIBILITY (h->other))
4360 v = _("hidden symbol");
4363 v = _("internal symbol");
4366 v = _("protected symbol");
4373 (*_bfd_error_handler)
4374 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"),
4375 input_bfd, v, h->root.root.string);
4376 bfd_set_error (bfd_error_bad_value);
4379 else if (!bfd_link_executable (info)
4380 && !SYMBOL_REFERENCES_LOCAL (info, h)
4381 && (h->type == STT_FUNC
4382 || h->type == STT_OBJECT)
4383 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4385 (*_bfd_error_handler)
4386 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"),
4388 h->type == STT_FUNC ? "function" : "data",
4389 h->root.root.string);
4390 bfd_set_error (bfd_error_bad_value);
4395 /* Note that sgot is not involved in this
4396 calculation. We always want the start of .got.plt. If we
4397 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4398 permitted by the ABI, we might have to change this
4400 relocation -= htab->elf.sgotplt->output_section->vma
4401 + htab->elf.sgotplt->output_offset;
4404 case R_X86_64_GOTPC32:
4405 case R_X86_64_GOTPC64:
4406 /* Use global offset table as symbol value. */
4407 relocation = htab->elf.sgotplt->output_section->vma
4408 + htab->elf.sgotplt->output_offset;
4409 unresolved_reloc = FALSE;
4412 case R_X86_64_PLTOFF64:
4413 /* Relocation is PLT entry relative to GOT. For local
4414 symbols it's the symbol itself relative to GOT. */
4416 /* See PLT32 handling. */
4417 && h->plt.offset != (bfd_vma) -1
4418 && htab->elf.splt != NULL)
4420 if (htab->plt_bnd != NULL)
4422 resolved_plt = htab->plt_bnd;
4423 plt_offset = eh->plt_bnd.offset;
4427 resolved_plt = htab->elf.splt;
4428 plt_offset = h->plt.offset;
4431 relocation = (resolved_plt->output_section->vma
4432 + resolved_plt->output_offset
4434 unresolved_reloc = FALSE;
4437 relocation -= htab->elf.sgotplt->output_section->vma
4438 + htab->elf.sgotplt->output_offset;
4441 case R_X86_64_PLT32:
4442 case R_X86_64_PLT32_BND:
4443 /* Relocation is to the entry for this symbol in the
4444 procedure linkage table. */
4446 /* Resolve a PLT32 reloc against a local symbol directly,
4447 without using the procedure linkage table. */
4451 if ((h->plt.offset == (bfd_vma) -1
4452 && eh->plt_got.offset == (bfd_vma) -1)
4453 || htab->elf.splt == NULL)
4455 /* We didn't make a PLT entry for this symbol. This
4456 happens when statically linking PIC code, or when
4457 using -Bsymbolic. */
4461 if (h->plt.offset != (bfd_vma) -1)
4463 if (htab->plt_bnd != NULL)
4465 resolved_plt = htab->plt_bnd;
4466 plt_offset = eh->plt_bnd.offset;
4470 resolved_plt = htab->elf.splt;
4471 plt_offset = h->plt.offset;
4476 /* Use the GOT PLT. */
4477 resolved_plt = htab->plt_got;
4478 plt_offset = eh->plt_got.offset;
4481 relocation = (resolved_plt->output_section->vma
4482 + resolved_plt->output_offset
4484 unresolved_reloc = FALSE;
4487 case R_X86_64_SIZE32:
4488 case R_X86_64_SIZE64:
4489 /* Set to symbol size. */
4490 relocation = st_size;
4496 case R_X86_64_PC32_BND:
4497 /* Don't complain about -fPIC if the symbol is undefined when
4498 building executable. */
4499 if (bfd_link_pic (info)
4500 && (input_section->flags & SEC_ALLOC) != 0
4501 && (input_section->flags & SEC_READONLY) != 0
4503 && !(bfd_link_executable (info)
4504 && h->root.type == bfd_link_hash_undefined))
4506 bfd_boolean fail = FALSE;
4508 = ((r_type == R_X86_64_PC32
4509 || r_type == R_X86_64_PC32_BND)
4510 && is_32bit_relative_branch (contents, rel->r_offset));
4512 if (SYMBOL_REFERENCES_LOCAL (info, h))
4514 /* Symbol is referenced locally. Make sure it is
4515 defined locally or for a branch. */
4516 fail = !h->def_regular && !branch;
4518 else if (!(bfd_link_executable (info)
4519 && (h->needs_copy || eh->needs_copy)))
4521 /* Symbol doesn't need copy reloc and isn't referenced
4522 locally. We only allow branch to symbol with
4523 non-default visibility. */
4525 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
4532 const char *pic = "";
4534 switch (ELF_ST_VISIBILITY (h->other))
4537 v = _("hidden symbol");
4540 v = _("internal symbol");
4543 v = _("protected symbol");
4547 pic = _("; recompile with -fPIC");
4552 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
4554 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
4556 (*_bfd_error_handler) (fmt, input_bfd,
4557 x86_64_elf_howto_table[r_type].name,
4558 v, h->root.root.string, pic);
4559 bfd_set_error (bfd_error_bad_value);
4570 /* FIXME: The ABI says the linker should make sure the value is
4571 the same when it's zeroextended to 64 bit. */
4574 if ((input_section->flags & SEC_ALLOC) == 0)
4577 /* Don't copy a pc-relative relocation into the output file
4578 if the symbol needs copy reloc or the symbol is undefined
4579 when building executable. Copy dynamic function pointer
4581 if ((bfd_link_pic (info)
4582 && !(bfd_link_executable (info)
4586 || h->root.type == bfd_link_hash_undefined)
4587 && IS_X86_64_PCREL_TYPE (r_type))
4589 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4590 || h->root.type != bfd_link_hash_undefweak)
4591 && ((! IS_X86_64_PCREL_TYPE (r_type)
4592 && r_type != R_X86_64_SIZE32
4593 && r_type != R_X86_64_SIZE64)
4594 || ! SYMBOL_CALLS_LOCAL (info, h)))
4595 || (ELIMINATE_COPY_RELOCS
4596 && !bfd_link_pic (info)
4599 && (!h->non_got_ref || eh->func_pointer_refcount > 0)
4602 || h->root.type == bfd_link_hash_undefweak
4603 || h->root.type == bfd_link_hash_undefined)))
4605 Elf_Internal_Rela outrel;
4606 bfd_boolean skip, relocate;
4609 /* When generating a shared object, these relocations
4610 are copied into the output file to be resolved at run
4616 _bfd_elf_section_offset (output_bfd, info, input_section,
4618 if (outrel.r_offset == (bfd_vma) -1)
4620 else if (outrel.r_offset == (bfd_vma) -2)
4621 skip = TRUE, relocate = TRUE;
4623 outrel.r_offset += (input_section->output_section->vma
4624 + input_section->output_offset);
4627 memset (&outrel, 0, sizeof outrel);
4629 /* h->dynindx may be -1 if this symbol was marked to
4633 && (IS_X86_64_PCREL_TYPE (r_type)
4634 || ! bfd_link_pic (info)
4635 || ! SYMBOLIC_BIND (info, h)
4636 || ! h->def_regular))
4638 outrel.r_info = htab->r_info (h->dynindx, r_type);
4639 outrel.r_addend = rel->r_addend;
4643 /* This symbol is local, or marked to become local. */
4644 if (r_type == htab->pointer_r_type)
4647 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4648 outrel.r_addend = relocation + rel->r_addend;
4650 else if (r_type == R_X86_64_64
4651 && !ABI_64_P (output_bfd))
4654 outrel.r_info = htab->r_info (0,
4655 R_X86_64_RELATIVE64);
4656 outrel.r_addend = relocation + rel->r_addend;
4657 /* Check addend overflow. */
4658 if ((outrel.r_addend & 0x80000000)
4659 != (rel->r_addend & 0x80000000))
4662 int addend = rel->r_addend;
4663 if (h && h->root.root.string)
4664 name = h->root.root.string;
4666 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4669 (*_bfd_error_handler)
4670 (_("%B: addend -0x%x in relocation %s against "
4671 "symbol `%s' at 0x%lx in section `%A' is "
4673 input_bfd, input_section, addend,
4674 x86_64_elf_howto_table[r_type].name,
4675 name, (unsigned long) rel->r_offset);
4677 (*_bfd_error_handler)
4678 (_("%B: addend 0x%x in relocation %s against "
4679 "symbol `%s' at 0x%lx in section `%A' is "
4681 input_bfd, input_section, addend,
4682 x86_64_elf_howto_table[r_type].name,
4683 name, (unsigned long) rel->r_offset);
4684 bfd_set_error (bfd_error_bad_value);
4692 if (bfd_is_abs_section (sec))
4694 else if (sec == NULL || sec->owner == NULL)
4696 bfd_set_error (bfd_error_bad_value);
4703 /* We are turning this relocation into one
4704 against a section symbol. It would be
4705 proper to subtract the symbol's value,
4706 osec->vma, from the emitted reloc addend,
4707 but ld.so expects buggy relocs. */
4708 osec = sec->output_section;
4709 sindx = elf_section_data (osec)->dynindx;
4712 asection *oi = htab->elf.text_index_section;
4713 sindx = elf_section_data (oi)->dynindx;
4715 BFD_ASSERT (sindx != 0);
4718 outrel.r_info = htab->r_info (sindx, r_type);
4719 outrel.r_addend = relocation + rel->r_addend;
4723 sreloc = elf_section_data (input_section)->sreloc;
4725 if (sreloc == NULL || sreloc->contents == NULL)
4727 r = bfd_reloc_notsupported;
4728 goto check_relocation_error;
4731 elf_append_rela (output_bfd, sreloc, &outrel);
4733 /* If this reloc is against an external symbol, we do
4734 not want to fiddle with the addend. Otherwise, we
4735 need to include the symbol value so that it becomes
4736 an addend for the dynamic reloc. */
4743 case R_X86_64_TLSGD:
4744 case R_X86_64_GOTPC32_TLSDESC:
4745 case R_X86_64_TLSDESC_CALL:
4746 case R_X86_64_GOTTPOFF:
4747 tls_type = GOT_UNKNOWN;
4748 if (h == NULL && local_got_offsets)
4749 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
4751 tls_type = elf_x86_64_hash_entry (h)->tls_type;
4753 if (! elf_x86_64_tls_transition (info, input_bfd,
4754 input_section, contents,
4755 symtab_hdr, sym_hashes,
4756 &r_type, tls_type, rel,
4757 relend, h, r_symndx))
4760 if (r_type == R_X86_64_TPOFF32)
4762 bfd_vma roff = rel->r_offset;
4764 BFD_ASSERT (! unresolved_reloc);
4766 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
4768 /* GD->LE transition. For 64bit, change
4769 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4770 .word 0x6666; rex64; call __tls_get_addr
4773 leaq foo@tpoff(%rax), %rax
4775 leaq foo@tlsgd(%rip), %rdi
4776 .word 0x6666; rex64; call __tls_get_addr
4779 leaq foo@tpoff(%rax), %rax
4780 For largepic, change:
4781 leaq foo@tlsgd(%rip), %rdi
4782 movabsq $__tls_get_addr@pltoff, %rax
4787 leaq foo@tpoff(%rax), %rax
4788 nopw 0x0(%rax,%rax,1) */
4790 if (ABI_64_P (output_bfd)
4791 && contents[roff + 5] == (bfd_byte) '\xb8')
4793 memcpy (contents + roff - 3,
4794 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4795 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4798 else if (ABI_64_P (output_bfd))
4799 memcpy (contents + roff - 4,
4800 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4803 memcpy (contents + roff - 3,
4804 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4806 bfd_put_32 (output_bfd,
4807 elf_x86_64_tpoff (info, relocation),
4808 contents + roff + 8 + largepic);
4809 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4814 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
4816 /* GDesc -> LE transition.
4817 It's originally something like:
4818 leaq x@tlsdesc(%rip), %rax
4821 movl $x@tpoff, %rax. */
4823 unsigned int val, type;
4825 type = bfd_get_8 (input_bfd, contents + roff - 3);
4826 val = bfd_get_8 (input_bfd, contents + roff - 1);
4827 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
4828 contents + roff - 3);
4829 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
4830 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4831 contents + roff - 1);
4832 bfd_put_32 (output_bfd,
4833 elf_x86_64_tpoff (info, relocation),
4837 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
4839 /* GDesc -> LE transition.
4844 bfd_put_8 (output_bfd, 0x66, contents + roff);
4845 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4848 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
4850 /* IE->LE transition:
4851 For 64bit, originally it can be one of:
4852 movq foo@gottpoff(%rip), %reg
4853 addq foo@gottpoff(%rip), %reg
4856 leaq foo(%reg), %reg
4858 For 32bit, originally it can be one of:
4859 movq foo@gottpoff(%rip), %reg
4860 addl foo@gottpoff(%rip), %reg
4863 leal foo(%reg), %reg
4866 unsigned int val, type, reg;
4869 val = bfd_get_8 (input_bfd, contents + roff - 3);
4872 type = bfd_get_8 (input_bfd, contents + roff - 2);
4873 reg = bfd_get_8 (input_bfd, contents + roff - 1);
4879 bfd_put_8 (output_bfd, 0x49,
4880 contents + roff - 3);
4881 else if (!ABI_64_P (output_bfd) && val == 0x44)
4882 bfd_put_8 (output_bfd, 0x41,
4883 contents + roff - 3);
4884 bfd_put_8 (output_bfd, 0xc7,
4885 contents + roff - 2);
4886 bfd_put_8 (output_bfd, 0xc0 | reg,
4887 contents + roff - 1);
4891 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4894 bfd_put_8 (output_bfd, 0x49,
4895 contents + roff - 3);
4896 else if (!ABI_64_P (output_bfd) && val == 0x44)
4897 bfd_put_8 (output_bfd, 0x41,
4898 contents + roff - 3);
4899 bfd_put_8 (output_bfd, 0x81,
4900 contents + roff - 2);
4901 bfd_put_8 (output_bfd, 0xc0 | reg,
4902 contents + roff - 1);
4906 /* addq/addl -> leaq/leal */
4908 bfd_put_8 (output_bfd, 0x4d,
4909 contents + roff - 3);
4910 else if (!ABI_64_P (output_bfd) && val == 0x44)
4911 bfd_put_8 (output_bfd, 0x45,
4912 contents + roff - 3);
4913 bfd_put_8 (output_bfd, 0x8d,
4914 contents + roff - 2);
4915 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
4916 contents + roff - 1);
4918 bfd_put_32 (output_bfd,
4919 elf_x86_64_tpoff (info, relocation),
4927 if (htab->elf.sgot == NULL)
4932 off = h->got.offset;
4933 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
4937 if (local_got_offsets == NULL)
4940 off = local_got_offsets[r_symndx];
4941 offplt = local_tlsdesc_gotents[r_symndx];
4948 Elf_Internal_Rela outrel;
4952 if (htab->elf.srelgot == NULL)
4955 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4957 if (GOT_TLS_GDESC_P (tls_type))
4959 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
4960 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
4961 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
4962 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4963 + htab->elf.sgotplt->output_offset
4965 + htab->sgotplt_jump_table_size);
4966 sreloc = htab->elf.srelplt;
4968 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4970 outrel.r_addend = 0;
4971 elf_append_rela (output_bfd, sreloc, &outrel);
4974 sreloc = htab->elf.srelgot;
4976 outrel.r_offset = (htab->elf.sgot->output_section->vma
4977 + htab->elf.sgot->output_offset + off);
4979 if (GOT_TLS_GD_P (tls_type))
4980 dr_type = R_X86_64_DTPMOD64;
4981 else if (GOT_TLS_GDESC_P (tls_type))
4984 dr_type = R_X86_64_TPOFF64;
4986 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
4987 outrel.r_addend = 0;
4988 if ((dr_type == R_X86_64_TPOFF64
4989 || dr_type == R_X86_64_TLSDESC) && indx == 0)
4990 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4991 outrel.r_info = htab->r_info (indx, dr_type);
4993 elf_append_rela (output_bfd, sreloc, &outrel);
4995 if (GOT_TLS_GD_P (tls_type))
4999 BFD_ASSERT (! unresolved_reloc);
5000 bfd_put_64 (output_bfd,
5001 relocation - elf_x86_64_dtpoff_base (info),
5002 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5006 bfd_put_64 (output_bfd, 0,
5007 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5008 outrel.r_info = htab->r_info (indx,
5010 outrel.r_offset += GOT_ENTRY_SIZE;
5011 elf_append_rela (output_bfd, sreloc,
5020 local_got_offsets[r_symndx] |= 1;
5023 if (off >= (bfd_vma) -2
5024 && ! GOT_TLS_GDESC_P (tls_type))
5026 if (r_type == ELF32_R_TYPE (rel->r_info))
5028 if (r_type == R_X86_64_GOTPC32_TLSDESC
5029 || r_type == R_X86_64_TLSDESC_CALL)
5030 relocation = htab->elf.sgotplt->output_section->vma
5031 + htab->elf.sgotplt->output_offset
5032 + offplt + htab->sgotplt_jump_table_size;
5034 relocation = htab->elf.sgot->output_section->vma
5035 + htab->elf.sgot->output_offset + off;
5036 unresolved_reloc = FALSE;
5040 bfd_vma roff = rel->r_offset;
5042 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
5044 /* GD->IE transition. For 64bit, change
5045 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5046 .word 0x6666; rex64; call __tls_get_addr@plt
5049 addq foo@gottpoff(%rip), %rax
5051 leaq foo@tlsgd(%rip), %rdi
5052 .word 0x6666; rex64; call __tls_get_addr@plt
5055 addq foo@gottpoff(%rip), %rax
5056 For largepic, change:
5057 leaq foo@tlsgd(%rip), %rdi
5058 movabsq $__tls_get_addr@pltoff, %rax
5063 addq foo@gottpoff(%rax), %rax
5064 nopw 0x0(%rax,%rax,1) */
5066 if (ABI_64_P (output_bfd)
5067 && contents[roff + 5] == (bfd_byte) '\xb8')
5069 memcpy (contents + roff - 3,
5070 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
5071 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5074 else if (ABI_64_P (output_bfd))
5075 memcpy (contents + roff - 4,
5076 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5079 memcpy (contents + roff - 3,
5080 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5083 relocation = (htab->elf.sgot->output_section->vma
5084 + htab->elf.sgot->output_offset + off
5087 - input_section->output_section->vma
5088 - input_section->output_offset
5090 bfd_put_32 (output_bfd, relocation,
5091 contents + roff + 8 + largepic);
5092 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
5097 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
5099 /* GDesc -> IE transition.
5100 It's originally something like:
5101 leaq x@tlsdesc(%rip), %rax
5104 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
5106 /* Now modify the instruction as appropriate. To
5107 turn a leaq into a movq in the form we use it, it
5108 suffices to change the second byte from 0x8d to
5110 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
5112 bfd_put_32 (output_bfd,
5113 htab->elf.sgot->output_section->vma
5114 + htab->elf.sgot->output_offset + off
5116 - input_section->output_section->vma
5117 - input_section->output_offset
5122 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
5124 /* GDesc -> IE transition.
5131 bfd_put_8 (output_bfd, 0x66, contents + roff);
5132 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5140 case R_X86_64_TLSLD:
5141 if (! elf_x86_64_tls_transition (info, input_bfd,
5142 input_section, contents,
5143 symtab_hdr, sym_hashes,
5144 &r_type, GOT_UNKNOWN,
5145 rel, relend, h, r_symndx))
5148 if (r_type != R_X86_64_TLSLD)
5150 /* LD->LE transition:
5151 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
5152 For 64bit, we change it into:
5153 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
5154 For 32bit, we change it into:
5155 nopl 0x0(%rax); movl %fs:0, %eax.
5156 For largepic, change:
5157 leaq foo@tlsgd(%rip), %rdi
5158 movabsq $__tls_get_addr@pltoff, %rax
5162 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
5165 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
5166 if (ABI_64_P (output_bfd)
5167 && contents[rel->r_offset + 5] == (bfd_byte) '\xb8')
5168 memcpy (contents + rel->r_offset - 3,
5169 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
5170 "\x64\x48\x8b\x04\x25\0\0\0", 22);
5171 else if (ABI_64_P (output_bfd))
5172 memcpy (contents + rel->r_offset - 3,
5173 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
5175 memcpy (contents + rel->r_offset - 3,
5176 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5177 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
5183 if (htab->elf.sgot == NULL)
5186 off = htab->tls_ld_got.offset;
5191 Elf_Internal_Rela outrel;
5193 if (htab->elf.srelgot == NULL)
5196 outrel.r_offset = (htab->elf.sgot->output_section->vma
5197 + htab->elf.sgot->output_offset + off);
5199 bfd_put_64 (output_bfd, 0,
5200 htab->elf.sgot->contents + off);
5201 bfd_put_64 (output_bfd, 0,
5202 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5203 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
5204 outrel.r_addend = 0;
5205 elf_append_rela (output_bfd, htab->elf.srelgot,
5207 htab->tls_ld_got.offset |= 1;
5209 relocation = htab->elf.sgot->output_section->vma
5210 + htab->elf.sgot->output_offset + off;
5211 unresolved_reloc = FALSE;
5214 case R_X86_64_DTPOFF32:
5215 if (!bfd_link_executable (info)
5216 || (input_section->flags & SEC_CODE) == 0)
5217 relocation -= elf_x86_64_dtpoff_base (info);
5219 relocation = elf_x86_64_tpoff (info, relocation);
5222 case R_X86_64_TPOFF32:
5223 case R_X86_64_TPOFF64:
5224 BFD_ASSERT (bfd_link_executable (info));
5225 relocation = elf_x86_64_tpoff (info, relocation);
5228 case R_X86_64_DTPOFF64:
5229 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
5230 relocation -= elf_x86_64_dtpoff_base (info);
5237 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5238 because such sections are not SEC_ALLOC and thus ld.so will
5239 not process them. */
5240 if (unresolved_reloc
5241 && !((input_section->flags & SEC_DEBUGGING) != 0
5243 && _bfd_elf_section_offset (output_bfd, info, input_section,
5244 rel->r_offset) != (bfd_vma) -1)
5246 (*_bfd_error_handler)
5247 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5250 (long) rel->r_offset,
5252 h->root.root.string);
5257 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5258 contents, rel->r_offset,
5259 relocation, rel->r_addend);
5261 check_relocation_error:
5262 if (r != bfd_reloc_ok)
5267 name = h->root.root.string;
5270 name = bfd_elf_string_from_elf_section (input_bfd,
5271 symtab_hdr->sh_link,
5276 name = bfd_section_name (input_bfd, sec);
5279 if (r == bfd_reloc_overflow)
5281 if (! ((*info->callbacks->reloc_overflow)
5282 (info, (h ? &h->root : NULL), name, howto->name,
5283 (bfd_vma) 0, input_bfd, input_section,
5289 (*_bfd_error_handler)
5290 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5291 input_bfd, input_section,
5292 (long) rel->r_offset, name, (int) r);
5303 Elf_Internal_Shdr *rel_hdr;
5304 size_t deleted = rel - wrel;
5306 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5307 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5308 if (rel_hdr->sh_size == 0)
5310 /* It is too late to remove an empty reloc section. Leave
5312 ??? What is wrong with an empty section??? */
5313 rel_hdr->sh_size = rel_hdr->sh_entsize;
5316 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5317 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5318 input_section->reloc_count -= deleted;
5324 /* Finish up dynamic symbol handling. We set the contents of various
5325 dynamic sections here. */
5328 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
5329 struct bfd_link_info *info,
5330 struct elf_link_hash_entry *h,
5331 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
5333 struct elf_x86_64_link_hash_table *htab;
5334 const struct elf_x86_64_backend_data *abed;
5335 bfd_boolean use_plt_bnd;
5336 struct elf_x86_64_link_hash_entry *eh;
5338 htab = elf_x86_64_hash_table (info);
5342 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5343 section only if there is .plt section. */
5344 use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL;
5346 ? &elf_x86_64_bnd_arch_bed
5347 : get_elf_x86_64_backend_data (output_bfd));
5349 eh = (struct elf_x86_64_link_hash_entry *) h;
5351 if (h->plt.offset != (bfd_vma) -1)
5354 bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset;
5355 bfd_vma plt_plt_insn_end, plt_got_insn_size;
5356 Elf_Internal_Rela rela;
5358 asection *plt, *gotplt, *relplt, *resolved_plt;
5359 const struct elf_backend_data *bed;
5360 bfd_vma plt_got_pcrel_offset;
5362 /* When building a static executable, use .iplt, .igot.plt and
5363 .rela.iplt sections for STT_GNU_IFUNC symbols. */
5364 if (htab->elf.splt != NULL)
5366 plt = htab->elf.splt;
5367 gotplt = htab->elf.sgotplt;
5368 relplt = htab->elf.srelplt;
5372 plt = htab->elf.iplt;
5373 gotplt = htab->elf.igotplt;
5374 relplt = htab->elf.irelplt;
5377 /* This symbol has an entry in the procedure linkage table. Set
5379 if ((h->dynindx == -1
5380 && !((h->forced_local || bfd_link_executable (info))
5382 && h->type == STT_GNU_IFUNC))
5388 /* Get the index in the procedure linkage table which
5389 corresponds to this symbol. This is the index of this symbol
5390 in all the symbols for which we are making plt entries. The
5391 first entry in the procedure linkage table is reserved.
5393 Get the offset into the .got table of the entry that
5394 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5395 bytes. The first three are reserved for the dynamic linker.
5397 For static executables, we don't reserve anything. */
5399 if (plt == htab->elf.splt)
5401 got_offset = h->plt.offset / abed->plt_entry_size - 1;
5402 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
5406 got_offset = h->plt.offset / abed->plt_entry_size;
5407 got_offset = got_offset * GOT_ENTRY_SIZE;
5410 plt_plt_insn_end = abed->plt_plt_insn_end;
5411 plt_plt_offset = abed->plt_plt_offset;
5412 plt_got_insn_size = abed->plt_got_insn_size;
5413 plt_got_offset = abed->plt_got_offset;
5416 /* Use the second PLT with BND relocations. */
5417 const bfd_byte *plt_entry, *plt2_entry;
5419 if (eh->has_bnd_reloc)
5421 plt_entry = elf_x86_64_bnd_plt_entry;
5422 plt2_entry = elf_x86_64_bnd_plt2_entry;
5426 plt_entry = elf_x86_64_legacy_plt_entry;
5427 plt2_entry = elf_x86_64_legacy_plt2_entry;
5429 /* Subtract 1 since there is no BND prefix. */
5430 plt_plt_insn_end -= 1;
5431 plt_plt_offset -= 1;
5432 plt_got_insn_size -= 1;
5433 plt_got_offset -= 1;
5436 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry)
5437 == sizeof (elf_x86_64_legacy_plt_entry));
5439 /* Fill in the entry in the procedure linkage table. */
5440 memcpy (plt->contents + h->plt.offset,
5441 plt_entry, sizeof (elf_x86_64_legacy_plt_entry));
5442 /* Fill in the entry in the second PLT. */
5443 memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset,
5444 plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry));
5446 resolved_plt = htab->plt_bnd;
5447 plt_offset = eh->plt_bnd.offset;
5451 /* Fill in the entry in the procedure linkage table. */
5452 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
5453 abed->plt_entry_size);
5456 plt_offset = h->plt.offset;
5459 /* Insert the relocation positions of the plt section. */
5461 /* Put offset the PC-relative instruction referring to the GOT entry,
5462 subtracting the size of that instruction. */
5463 plt_got_pcrel_offset = (gotplt->output_section->vma
5464 + gotplt->output_offset
5466 - resolved_plt->output_section->vma
5467 - resolved_plt->output_offset
5469 - plt_got_insn_size);
5471 /* Check PC-relative offset overflow in PLT entry. */
5472 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
5473 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5474 output_bfd, h->root.root.string);
5476 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
5477 resolved_plt->contents + plt_offset + plt_got_offset);
5479 /* Fill in the entry in the global offset table, initially this
5480 points to the second part of the PLT entry. */
5481 bfd_put_64 (output_bfd, (plt->output_section->vma
5482 + plt->output_offset
5483 + h->plt.offset + abed->plt_lazy_offset),
5484 gotplt->contents + got_offset);
5486 /* Fill in the entry in the .rela.plt section. */
5487 rela.r_offset = (gotplt->output_section->vma
5488 + gotplt->output_offset
5490 if (h->dynindx == -1
5491 || ((bfd_link_executable (info)
5492 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5494 && h->type == STT_GNU_IFUNC))
5496 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5497 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5498 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
5499 rela.r_addend = (h->root.u.def.value
5500 + h->root.u.def.section->output_section->vma
5501 + h->root.u.def.section->output_offset);
5502 /* R_X86_64_IRELATIVE comes last. */
5503 plt_index = htab->next_irelative_index--;
5507 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
5509 plt_index = htab->next_jump_slot_index++;
5512 /* Don't fill PLT entry for static executables. */
5513 if (plt == htab->elf.splt)
5515 bfd_vma plt0_offset = h->plt.offset + plt_plt_insn_end;
5517 /* Put relocation index. */
5518 bfd_put_32 (output_bfd, plt_index,
5519 plt->contents + h->plt.offset + abed->plt_reloc_offset);
5521 /* Put offset for jmp .PLT0 and check for overflow. We don't
5522 check relocation index for overflow since branch displacement
5523 will overflow first. */
5524 if (plt0_offset > 0x80000000)
5525 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5526 output_bfd, h->root.root.string);
5527 bfd_put_32 (output_bfd, - plt0_offset,
5528 plt->contents + h->plt.offset + plt_plt_offset);
5531 bed = get_elf_backend_data (output_bfd);
5532 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
5533 bed->s->swap_reloca_out (output_bfd, &rela, loc);
5535 else if (eh->plt_got.offset != (bfd_vma) -1)
5537 bfd_vma got_offset, plt_offset, plt_got_offset, plt_got_insn_size;
5538 asection *plt, *got;
5539 bfd_boolean got_after_plt;
5540 int32_t got_pcrel_offset;
5541 const bfd_byte *got_plt_entry;
5543 /* Set the entry in the GOT procedure linkage table. */
5544 plt = htab->plt_got;
5545 got = htab->elf.sgot;
5546 got_offset = h->got.offset;
5548 if (got_offset == (bfd_vma) -1
5549 || h->type == STT_GNU_IFUNC
5554 /* Use the second PLT entry template for the GOT PLT since they
5555 are the identical. */
5556 plt_got_insn_size = elf_x86_64_bnd_arch_bed.plt_got_insn_size;
5557 plt_got_offset = elf_x86_64_bnd_arch_bed.plt_got_offset;
5558 if (eh->has_bnd_reloc)
5559 got_plt_entry = elf_x86_64_bnd_plt2_entry;
5562 got_plt_entry = elf_x86_64_legacy_plt2_entry;
5564 /* Subtract 1 since there is no BND prefix. */
5565 plt_got_insn_size -= 1;
5566 plt_got_offset -= 1;
5569 /* Fill in the entry in the GOT procedure linkage table. */
5570 plt_offset = eh->plt_got.offset;
5571 memcpy (plt->contents + plt_offset,
5572 got_plt_entry, sizeof (elf_x86_64_legacy_plt2_entry));
5574 /* Put offset the PC-relative instruction referring to the GOT
5575 entry, subtracting the size of that instruction. */
5576 got_pcrel_offset = (got->output_section->vma
5577 + got->output_offset
5579 - plt->output_section->vma
5580 - plt->output_offset
5582 - plt_got_insn_size);
5584 /* Check PC-relative offset overflow in GOT PLT entry. */
5585 got_after_plt = got->output_section->vma > plt->output_section->vma;
5586 if ((got_after_plt && got_pcrel_offset < 0)
5587 || (!got_after_plt && got_pcrel_offset > 0))
5588 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5589 output_bfd, h->root.root.string);
5591 bfd_put_32 (output_bfd, got_pcrel_offset,
5592 plt->contents + plt_offset + plt_got_offset);
5596 && (h->plt.offset != (bfd_vma) -1
5597 || eh->plt_got.offset != (bfd_vma) -1))
5599 /* Mark the symbol as undefined, rather than as defined in
5600 the .plt section. Leave the value if there were any
5601 relocations where pointer equality matters (this is a clue
5602 for the dynamic linker, to make function pointer
5603 comparisons work between an application and shared
5604 library), otherwise set it to zero. If a function is only
5605 called from a binary, there is no need to slow down
5606 shared libraries because of that. */
5607 sym->st_shndx = SHN_UNDEF;
5608 if (!h->pointer_equality_needed)
5612 if (h->got.offset != (bfd_vma) -1
5613 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
5614 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
5616 Elf_Internal_Rela rela;
5618 /* This symbol has an entry in the global offset table. Set it
5620 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
5623 rela.r_offset = (htab->elf.sgot->output_section->vma
5624 + htab->elf.sgot->output_offset
5625 + (h->got.offset &~ (bfd_vma) 1));
5627 /* If this is a static link, or it is a -Bsymbolic link and the
5628 symbol is defined locally or was forced to be local because
5629 of a version file, we just want to emit a RELATIVE reloc.
5630 The entry in the global offset table will already have been
5631 initialized in the relocate_section function. */
5633 && h->type == STT_GNU_IFUNC)
5635 if (bfd_link_pic (info))
5637 /* Generate R_X86_64_GLOB_DAT. */
5644 if (!h->pointer_equality_needed)
5647 /* For non-shared object, we can't use .got.plt, which
5648 contains the real function addres if we need pointer
5649 equality. We load the GOT entry with the PLT entry. */
5650 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
5651 bfd_put_64 (output_bfd, (plt->output_section->vma
5652 + plt->output_offset
5654 htab->elf.sgot->contents + h->got.offset);
5658 else if (bfd_link_pic (info)
5659 && SYMBOL_REFERENCES_LOCAL (info, h))
5661 if (!h->def_regular)
5663 BFD_ASSERT((h->got.offset & 1) != 0);
5664 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
5665 rela.r_addend = (h->root.u.def.value
5666 + h->root.u.def.section->output_section->vma
5667 + h->root.u.def.section->output_offset);
5671 BFD_ASSERT((h->got.offset & 1) == 0);
5673 bfd_put_64 (output_bfd, (bfd_vma) 0,
5674 htab->elf.sgot->contents + h->got.offset);
5675 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
5679 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
5684 Elf_Internal_Rela rela;
5686 /* This symbol needs a copy reloc. Set it up. */
5688 if (h->dynindx == -1
5689 || (h->root.type != bfd_link_hash_defined
5690 && h->root.type != bfd_link_hash_defweak)
5691 || htab->srelbss == NULL)
5694 rela.r_offset = (h->root.u.def.value
5695 + h->root.u.def.section->output_section->vma
5696 + h->root.u.def.section->output_offset);
5697 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
5699 elf_append_rela (output_bfd, htab->srelbss, &rela);
5705 /* Finish up local dynamic symbol handling. We set the contents of
5706 various dynamic sections here. */
5709 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
5711 struct elf_link_hash_entry *h
5712 = (struct elf_link_hash_entry *) *slot;
5713 struct bfd_link_info *info
5714 = (struct bfd_link_info *) inf;
5716 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
5720 /* Used to decide how to sort relocs in an optimal manner for the
5721 dynamic linker, before writing them out. */
5723 static enum elf_reloc_type_class
5724 elf_x86_64_reloc_type_class (const struct bfd_link_info *info,
5725 const asection *rel_sec ATTRIBUTE_UNUSED,
5726 const Elf_Internal_Rela *rela)
5728 bfd *abfd = info->output_bfd;
5729 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5730 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
5732 if (htab->elf.dynsym != NULL
5733 && htab->elf.dynsym->contents != NULL)
5735 /* Check relocation against STT_GNU_IFUNC symbol if there are
5737 unsigned long r_symndx = htab->r_sym (rela->r_info);
5738 Elf_Internal_Sym sym;
5739 if (!bed->s->swap_symbol_in (abfd,
5740 (htab->elf.dynsym->contents
5741 + r_symndx * bed->s->sizeof_sym),
5745 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5746 return reloc_class_ifunc;
5749 switch ((int) ELF32_R_TYPE (rela->r_info))
5751 case R_X86_64_RELATIVE:
5752 case R_X86_64_RELATIVE64:
5753 return reloc_class_relative;
5754 case R_X86_64_JUMP_SLOT:
5755 return reloc_class_plt;
5757 return reloc_class_copy;
5759 return reloc_class_normal;
5763 /* Finish up the dynamic sections. */
5766 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
5767 struct bfd_link_info *info)
5769 struct elf_x86_64_link_hash_table *htab;
5772 const struct elf_x86_64_backend_data *abed;
5774 htab = elf_x86_64_hash_table (info);
5778 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5779 section only if there is .plt section. */
5780 abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL
5781 ? &elf_x86_64_bnd_arch_bed
5782 : get_elf_x86_64_backend_data (output_bfd));
5784 dynobj = htab->elf.dynobj;
5785 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5787 if (htab->elf.dynamic_sections_created)
5789 bfd_byte *dyncon, *dynconend;
5790 const struct elf_backend_data *bed;
5791 bfd_size_type sizeof_dyn;
5793 if (sdyn == NULL || htab->elf.sgot == NULL)
5796 bed = get_elf_backend_data (dynobj);
5797 sizeof_dyn = bed->s->sizeof_dyn;
5798 dyncon = sdyn->contents;
5799 dynconend = sdyn->contents + sdyn->size;
5800 for (; dyncon < dynconend; dyncon += sizeof_dyn)
5802 Elf_Internal_Dyn dyn;
5805 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
5813 s = htab->elf.sgotplt;
5814 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5818 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
5822 s = htab->elf.srelplt->output_section;
5823 dyn.d_un.d_val = s->size;
5827 /* The procedure linkage table relocs (DT_JMPREL) should
5828 not be included in the overall relocs (DT_RELA).
5829 Therefore, we override the DT_RELASZ entry here to
5830 make it not include the JMPREL relocs. Since the
5831 linker script arranges for .rela.plt to follow all
5832 other relocation sections, we don't have to worry
5833 about changing the DT_RELA entry. */
5834 if (htab->elf.srelplt != NULL)
5836 s = htab->elf.srelplt->output_section;
5837 dyn.d_un.d_val -= s->size;
5841 case DT_TLSDESC_PLT:
5843 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5844 + htab->tlsdesc_plt;
5847 case DT_TLSDESC_GOT:
5849 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5850 + htab->tlsdesc_got;
5854 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
5857 /* Fill in the special first entry in the procedure linkage table. */
5858 if (htab->elf.splt && htab->elf.splt->size > 0)
5860 /* Fill in the first entry in the procedure linkage table. */
5861 memcpy (htab->elf.splt->contents,
5862 abed->plt0_entry, abed->plt_entry_size);
5863 /* Add offset for pushq GOT+8(%rip), since the instruction
5864 uses 6 bytes subtract this value. */
5865 bfd_put_32 (output_bfd,
5866 (htab->elf.sgotplt->output_section->vma
5867 + htab->elf.sgotplt->output_offset
5869 - htab->elf.splt->output_section->vma
5870 - htab->elf.splt->output_offset
5872 htab->elf.splt->contents + abed->plt0_got1_offset);
5873 /* Add offset for the PC-relative instruction accessing GOT+16,
5874 subtracting the offset to the end of that instruction. */
5875 bfd_put_32 (output_bfd,
5876 (htab->elf.sgotplt->output_section->vma
5877 + htab->elf.sgotplt->output_offset
5879 - htab->elf.splt->output_section->vma
5880 - htab->elf.splt->output_offset
5881 - abed->plt0_got2_insn_end),
5882 htab->elf.splt->contents + abed->plt0_got2_offset);
5884 elf_section_data (htab->elf.splt->output_section)
5885 ->this_hdr.sh_entsize = abed->plt_entry_size;
5887 if (htab->tlsdesc_plt)
5889 bfd_put_64 (output_bfd, (bfd_vma) 0,
5890 htab->elf.sgot->contents + htab->tlsdesc_got);
5892 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
5893 abed->plt0_entry, abed->plt_entry_size);
5895 /* Add offset for pushq GOT+8(%rip), since the
5896 instruction uses 6 bytes subtract this value. */
5897 bfd_put_32 (output_bfd,
5898 (htab->elf.sgotplt->output_section->vma
5899 + htab->elf.sgotplt->output_offset
5901 - htab->elf.splt->output_section->vma
5902 - htab->elf.splt->output_offset
5905 htab->elf.splt->contents
5906 + htab->tlsdesc_plt + abed->plt0_got1_offset);
5907 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5908 where TGD stands for htab->tlsdesc_got, subtracting the offset
5909 to the end of that instruction. */
5910 bfd_put_32 (output_bfd,
5911 (htab->elf.sgot->output_section->vma
5912 + htab->elf.sgot->output_offset
5914 - htab->elf.splt->output_section->vma
5915 - htab->elf.splt->output_offset
5917 - abed->plt0_got2_insn_end),
5918 htab->elf.splt->contents
5919 + htab->tlsdesc_plt + abed->plt0_got2_offset);
5924 if (htab->plt_bnd != NULL)
5925 elf_section_data (htab->plt_bnd->output_section)
5926 ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry);
5928 if (htab->elf.sgotplt)
5930 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5932 (*_bfd_error_handler)
5933 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5937 /* Fill in the first three entries in the global offset table. */
5938 if (htab->elf.sgotplt->size > 0)
5940 /* Set the first entry in the global offset table to the address of
5941 the dynamic section. */
5943 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
5945 bfd_put_64 (output_bfd,
5946 sdyn->output_section->vma + sdyn->output_offset,
5947 htab->elf.sgotplt->contents);
5948 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5949 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
5950 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
5953 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
5957 /* Adjust .eh_frame for .plt section. */
5958 if (htab->plt_eh_frame != NULL
5959 && htab->plt_eh_frame->contents != NULL)
5961 if (htab->elf.splt != NULL
5962 && htab->elf.splt->size != 0
5963 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5964 && htab->elf.splt->output_section != NULL
5965 && htab->plt_eh_frame->output_section != NULL)
5967 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5968 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5969 + htab->plt_eh_frame->output_offset
5970 + PLT_FDE_START_OFFSET;
5971 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5972 htab->plt_eh_frame->contents
5973 + PLT_FDE_START_OFFSET);
5975 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5977 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5979 htab->plt_eh_frame->contents))
5984 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5985 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
5988 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5989 htab_traverse (htab->loc_hash_table,
5990 elf_x86_64_finish_local_dynamic_symbol,
5996 /* Return an array of PLT entry symbol values. */
5999 elf_x86_64_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
6002 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6005 bfd_vma *plt_sym_val;
6007 bfd_byte *plt_contents;
6008 const struct elf_x86_64_backend_data *bed;
6009 Elf_Internal_Shdr *hdr;
6012 /* Get the .plt section contents. PLT passed down may point to the
6013 .plt.bnd section. Make sure that PLT always points to the .plt
6015 plt_bnd = bfd_get_section_by_name (abfd, ".plt.bnd");
6020 plt = bfd_get_section_by_name (abfd, ".plt");
6023 bed = &elf_x86_64_bnd_arch_bed;
6026 bed = get_elf_x86_64_backend_data (abfd);
6028 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
6029 if (plt_contents == NULL)
6031 if (!bfd_get_section_contents (abfd, (asection *) plt,
6032 plt_contents, 0, plt->size))
6035 free (plt_contents);
6039 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6040 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
6043 hdr = &elf_section_data (relplt)->this_hdr;
6044 count = relplt->size / hdr->sh_entsize;
6046 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
6047 if (plt_sym_val == NULL)
6050 for (i = 0; i < count; i++)
6051 plt_sym_val[i] = -1;
6053 plt_offset = bed->plt_entry_size;
6054 p = relplt->relocation;
6055 for (i = 0; i < count; i++, p++)
6059 /* Skip unknown relocation. */
6060 if (p->howto == NULL)
6063 if (p->howto->type != R_X86_64_JUMP_SLOT
6064 && p->howto->type != R_X86_64_IRELATIVE)
6067 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
6068 + bed->plt_reloc_offset));
6069 if (reloc_index >= count)
6073 /* This is the index in .plt section. */
6074 long plt_index = plt_offset / bed->plt_entry_size;
6075 /* Store VMA + the offset in .plt.bnd section. */
6076 plt_sym_val[reloc_index] =
6078 + (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry));
6081 plt_sym_val[reloc_index] = plt->vma + plt_offset;
6082 plt_offset += bed->plt_entry_size;
6084 /* PR binutils/18437: Skip extra relocations in the .rela.plt
6086 if (plt_offset >= plt->size)
6090 free (plt_contents);
6095 /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
6099 elf_x86_64_get_synthetic_symtab (bfd *abfd,
6106 /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab
6107 as PLT if it exists. */
6108 asection *plt = bfd_get_section_by_name (abfd, ".plt.bnd");
6110 plt = bfd_get_section_by_name (abfd, ".plt");
6111 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
6112 dynsymcount, dynsyms, ret,
6114 elf_x86_64_get_plt_sym_val);
6117 /* Handle an x86-64 specific section when reading an object file. This
6118 is called when elfcode.h finds a section with an unknown type. */
6121 elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
6122 const char *name, int shindex)
6124 if (hdr->sh_type != SHT_X86_64_UNWIND)
6127 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6133 /* Hook called by the linker routine which adds symbols from an object
6134 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
6138 elf_x86_64_add_symbol_hook (bfd *abfd,
6139 struct bfd_link_info *info,
6140 Elf_Internal_Sym *sym,
6141 const char **namep ATTRIBUTE_UNUSED,
6142 flagword *flagsp ATTRIBUTE_UNUSED,
6148 switch (sym->st_shndx)
6150 case SHN_X86_64_LCOMMON:
6151 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
6154 lcomm = bfd_make_section_with_flags (abfd,
6158 | SEC_LINKER_CREATED));
6161 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
6164 *valp = sym->st_size;
6168 if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE
6169 && (abfd->flags & DYNAMIC) == 0
6170 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
6171 elf_tdata (info->output_bfd)->has_gnu_symbols
6172 |= elf_gnu_symbol_unique;
6178 /* Given a BFD section, try to locate the corresponding ELF section
6182 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
6183 asection *sec, int *index_return)
6185 if (sec == &_bfd_elf_large_com_section)
6187 *index_return = SHN_X86_64_LCOMMON;
6193 /* Process a symbol. */
6196 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
6199 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
6201 switch (elfsym->internal_elf_sym.st_shndx)
6203 case SHN_X86_64_LCOMMON:
6204 asym->section = &_bfd_elf_large_com_section;
6205 asym->value = elfsym->internal_elf_sym.st_size;
6206 /* Common symbol doesn't set BSF_GLOBAL. */
6207 asym->flags &= ~BSF_GLOBAL;
6213 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
6215 return (sym->st_shndx == SHN_COMMON
6216 || sym->st_shndx == SHN_X86_64_LCOMMON);
6220 elf_x86_64_common_section_index (asection *sec)
6222 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
6225 return SHN_X86_64_LCOMMON;
6229 elf_x86_64_common_section (asection *sec)
6231 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
6232 return bfd_com_section_ptr;
6234 return &_bfd_elf_large_com_section;
6238 elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
6239 const Elf_Internal_Sym *sym,
6244 const asection *oldsec)
6246 /* A normal common symbol and a large common symbol result in a
6247 normal common symbol. We turn the large common symbol into a
6250 && h->root.type == bfd_link_hash_common
6252 && bfd_is_com_section (*psec)
6255 if (sym->st_shndx == SHN_COMMON
6256 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
6258 h->root.u.c.p->section
6259 = bfd_make_section_old_way (oldbfd, "COMMON");
6260 h->root.u.c.p->section->flags = SEC_ALLOC;
6262 else if (sym->st_shndx == SHN_X86_64_LCOMMON
6263 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
6264 *psec = bfd_com_section_ptr;
6271 elf_x86_64_additional_program_headers (bfd *abfd,
6272 struct bfd_link_info *info ATTRIBUTE_UNUSED)
6277 /* Check to see if we need a large readonly segment. */
6278 s = bfd_get_section_by_name (abfd, ".lrodata");
6279 if (s && (s->flags & SEC_LOAD))
6282 /* Check to see if we need a large data segment. Since .lbss sections
6283 is placed right after the .bss section, there should be no need for
6284 a large data segment just because of .lbss. */
6285 s = bfd_get_section_by_name (abfd, ".ldata");
6286 if (s && (s->flags & SEC_LOAD))
6292 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6295 elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
6297 if (h->plt.offset != (bfd_vma) -1
6299 && !h->pointer_equality_needed)
6302 return _bfd_elf_hash_symbol (h);
6305 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
6308 elf_x86_64_relocs_compatible (const bfd_target *input,
6309 const bfd_target *output)
6311 return ((xvec_get_elf_backend_data (input)->s->elfclass
6312 == xvec_get_elf_backend_data (output)->s->elfclass)
6313 && _bfd_elf_relocs_compatible (input, output));
6316 static const struct bfd_elf_special_section
6317 elf_x86_64_special_sections[]=
6319 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6320 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6321 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
6322 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6323 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6324 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6325 { NULL, 0, 0, 0, 0 }
6328 #define TARGET_LITTLE_SYM x86_64_elf64_vec
6329 #define TARGET_LITTLE_NAME "elf64-x86-64"
6330 #define ELF_ARCH bfd_arch_i386
6331 #define ELF_TARGET_ID X86_64_ELF_DATA
6332 #define ELF_MACHINE_CODE EM_X86_64
6333 #define ELF_MAXPAGESIZE 0x200000
6334 #define ELF_MINPAGESIZE 0x1000
6335 #define ELF_COMMONPAGESIZE 0x1000
6337 #define elf_backend_can_gc_sections 1
6338 #define elf_backend_can_refcount 1
6339 #define elf_backend_want_got_plt 1
6340 #define elf_backend_plt_readonly 1
6341 #define elf_backend_want_plt_sym 0
6342 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
6343 #define elf_backend_rela_normal 1
6344 #define elf_backend_plt_alignment 4
6345 #define elf_backend_extern_protected_data 1
6347 #define elf_info_to_howto elf_x86_64_info_to_howto
6349 #define bfd_elf64_bfd_link_hash_table_create \
6350 elf_x86_64_link_hash_table_create
6351 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
6352 #define bfd_elf64_bfd_reloc_name_lookup \
6353 elf_x86_64_reloc_name_lookup
6355 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
6356 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
6357 #define elf_backend_check_relocs elf_x86_64_check_relocs
6358 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
6359 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
6360 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
6361 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
6362 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
6363 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
6364 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
6365 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
6367 #define elf_backend_write_core_note elf_x86_64_write_core_note
6369 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
6370 #define elf_backend_relocate_section elf_x86_64_relocate_section
6371 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
6372 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
6373 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
6374 #define elf_backend_object_p elf64_x86_64_elf_object_p
6375 #define bfd_elf64_mkobject elf_x86_64_mkobject
6376 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
6378 #define elf_backend_section_from_shdr \
6379 elf_x86_64_section_from_shdr
6381 #define elf_backend_section_from_bfd_section \
6382 elf_x86_64_elf_section_from_bfd_section
6383 #define elf_backend_add_symbol_hook \
6384 elf_x86_64_add_symbol_hook
6385 #define elf_backend_symbol_processing \
6386 elf_x86_64_symbol_processing
6387 #define elf_backend_common_section_index \
6388 elf_x86_64_common_section_index
6389 #define elf_backend_common_section \
6390 elf_x86_64_common_section
6391 #define elf_backend_common_definition \
6392 elf_x86_64_common_definition
6393 #define elf_backend_merge_symbol \
6394 elf_x86_64_merge_symbol
6395 #define elf_backend_special_sections \
6396 elf_x86_64_special_sections
6397 #define elf_backend_additional_program_headers \
6398 elf_x86_64_additional_program_headers
6399 #define elf_backend_hash_symbol \
6400 elf_x86_64_hash_symbol
6402 #include "elf64-target.h"
6404 /* CloudABI support. */
6406 #undef TARGET_LITTLE_SYM
6407 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
6408 #undef TARGET_LITTLE_NAME
6409 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
6412 #define ELF_OSABI ELFOSABI_CLOUDABI
6415 #define elf64_bed elf64_x86_64_cloudabi_bed
6417 #include "elf64-target.h"
6419 /* FreeBSD support. */
6421 #undef TARGET_LITTLE_SYM
6422 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
6423 #undef TARGET_LITTLE_NAME
6424 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
6427 #define ELF_OSABI ELFOSABI_FREEBSD
6430 #define elf64_bed elf64_x86_64_fbsd_bed
6432 #include "elf64-target.h"
6434 /* Solaris 2 support. */
6436 #undef TARGET_LITTLE_SYM
6437 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
6438 #undef TARGET_LITTLE_NAME
6439 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
6441 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6442 objects won't be recognized. */
6446 #define elf64_bed elf64_x86_64_sol2_bed
6448 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6450 #undef elf_backend_static_tls_alignment
6451 #define elf_backend_static_tls_alignment 16
6453 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6455 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6457 #undef elf_backend_want_plt_sym
6458 #define elf_backend_want_plt_sym 1
6460 #include "elf64-target.h"
6462 /* Native Client support. */
6465 elf64_x86_64_nacl_elf_object_p (bfd *abfd)
6467 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6468 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
6472 #undef TARGET_LITTLE_SYM
6473 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
6474 #undef TARGET_LITTLE_NAME
6475 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6477 #define elf64_bed elf64_x86_64_nacl_bed
6479 #undef ELF_MAXPAGESIZE
6480 #undef ELF_MINPAGESIZE
6481 #undef ELF_COMMONPAGESIZE
6482 #define ELF_MAXPAGESIZE 0x10000
6483 #define ELF_MINPAGESIZE 0x10000
6484 #define ELF_COMMONPAGESIZE 0x10000
6486 /* Restore defaults. */
6488 #undef elf_backend_static_tls_alignment
6489 #undef elf_backend_want_plt_sym
6490 #define elf_backend_want_plt_sym 0
6492 /* NaCl uses substantially different PLT entries for the same effects. */
6494 #undef elf_backend_plt_alignment
6495 #define elf_backend_plt_alignment 5
6496 #define NACL_PLT_ENTRY_SIZE 64
6497 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6499 static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
6501 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6502 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6503 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6504 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6505 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6507 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
6508 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
6510 /* 32 bytes of nop to pad out to the standard size. */
6511 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6512 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6513 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6514 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6515 0x66, /* excess data32 prefix */
6519 static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6521 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6522 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6523 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6524 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6526 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6527 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6528 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6530 /* Lazy GOT entries point here (32-byte aligned). */
6531 0x68, /* pushq immediate */
6532 0, 0, 0, 0, /* replaced with index into relocation table. */
6533 0xe9, /* jmp relative */
6534 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6536 /* 22 bytes of nop to pad out to the standard size. */
6537 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6538 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6539 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6542 /* .eh_frame covering the .plt section. */
6544 static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
6546 #if (PLT_CIE_LENGTH != 20 \
6547 || PLT_FDE_LENGTH != 36 \
6548 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6549 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6550 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6552 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6553 0, 0, 0, 0, /* CIE ID */
6554 1, /* CIE version */
6555 'z', 'R', 0, /* Augmentation string */
6556 1, /* Code alignment factor */
6557 0x78, /* Data alignment factor */
6558 16, /* Return address column */
6559 1, /* Augmentation size */
6560 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6561 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6562 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6563 DW_CFA_nop, DW_CFA_nop,
6565 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6566 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
6567 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6568 0, 0, 0, 0, /* .plt size goes here */
6569 0, /* Augmentation size */
6570 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
6571 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6572 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
6573 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6574 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6575 13, /* Block length */
6576 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
6577 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
6578 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6579 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
6580 DW_CFA_nop, DW_CFA_nop
6583 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
6585 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
6586 elf_x86_64_nacl_plt_entry, /* plt_entry */
6587 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6588 2, /* plt0_got1_offset */
6589 9, /* plt0_got2_offset */
6590 13, /* plt0_got2_insn_end */
6591 3, /* plt_got_offset */
6592 33, /* plt_reloc_offset */
6593 38, /* plt_plt_offset */
6594 7, /* plt_got_insn_size */
6595 42, /* plt_plt_insn_end */
6596 32, /* plt_lazy_offset */
6597 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
6598 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
6601 #undef elf_backend_arch_data
6602 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6604 #undef elf_backend_object_p
6605 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
6606 #undef elf_backend_modify_segment_map
6607 #define elf_backend_modify_segment_map nacl_modify_segment_map
6608 #undef elf_backend_modify_program_headers
6609 #define elf_backend_modify_program_headers nacl_modify_program_headers
6610 #undef elf_backend_final_write_processing
6611 #define elf_backend_final_write_processing nacl_final_write_processing
6613 #include "elf64-target.h"
6615 /* Native Client x32 support. */
6618 elf32_x86_64_nacl_elf_object_p (bfd *abfd)
6620 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6621 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
6625 #undef TARGET_LITTLE_SYM
6626 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
6627 #undef TARGET_LITTLE_NAME
6628 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6630 #define elf32_bed elf32_x86_64_nacl_bed
6632 #define bfd_elf32_bfd_link_hash_table_create \
6633 elf_x86_64_link_hash_table_create
6634 #define bfd_elf32_bfd_reloc_type_lookup \
6635 elf_x86_64_reloc_type_lookup
6636 #define bfd_elf32_bfd_reloc_name_lookup \
6637 elf_x86_64_reloc_name_lookup
6638 #define bfd_elf32_mkobject \
6640 #define bfd_elf32_get_synthetic_symtab \
6641 elf_x86_64_get_synthetic_symtab
6643 #undef elf_backend_object_p
6644 #define elf_backend_object_p \
6645 elf32_x86_64_nacl_elf_object_p
6647 #undef elf_backend_bfd_from_remote_memory
6648 #define elf_backend_bfd_from_remote_memory \
6649 _bfd_elf32_bfd_from_remote_memory
6651 #undef elf_backend_size_info
6652 #define elf_backend_size_info \
6653 _bfd_elf32_size_info
6655 #include "elf32-target.h"
6657 /* Restore defaults. */
6658 #undef elf_backend_object_p
6659 #define elf_backend_object_p elf64_x86_64_elf_object_p
6660 #undef elf_backend_bfd_from_remote_memory
6661 #undef elf_backend_size_info
6662 #undef elf_backend_modify_segment_map
6663 #undef elf_backend_modify_program_headers
6664 #undef elf_backend_final_write_processing
6666 /* Intel L1OM support. */
6669 elf64_l1om_elf_object_p (bfd *abfd)
6671 /* Set the right machine number for an L1OM elf64 file. */
6672 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
6676 #undef TARGET_LITTLE_SYM
6677 #define TARGET_LITTLE_SYM l1om_elf64_vec
6678 #undef TARGET_LITTLE_NAME
6679 #define TARGET_LITTLE_NAME "elf64-l1om"
6681 #define ELF_ARCH bfd_arch_l1om
6683 #undef ELF_MACHINE_CODE
6684 #define ELF_MACHINE_CODE EM_L1OM
6689 #define elf64_bed elf64_l1om_bed
6691 #undef elf_backend_object_p
6692 #define elf_backend_object_p elf64_l1om_elf_object_p
6694 /* Restore defaults. */
6695 #undef ELF_MAXPAGESIZE
6696 #undef ELF_MINPAGESIZE
6697 #undef ELF_COMMONPAGESIZE
6698 #define ELF_MAXPAGESIZE 0x200000
6699 #define ELF_MINPAGESIZE 0x1000
6700 #define ELF_COMMONPAGESIZE 0x1000
6701 #undef elf_backend_plt_alignment
6702 #define elf_backend_plt_alignment 4
6703 #undef elf_backend_arch_data
6704 #define elf_backend_arch_data &elf_x86_64_arch_bed
6706 #include "elf64-target.h"
6708 /* FreeBSD L1OM support. */
6710 #undef TARGET_LITTLE_SYM
6711 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
6712 #undef TARGET_LITTLE_NAME
6713 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6716 #define ELF_OSABI ELFOSABI_FREEBSD
6719 #define elf64_bed elf64_l1om_fbsd_bed
6721 #include "elf64-target.h"
6723 /* Intel K1OM support. */
6726 elf64_k1om_elf_object_p (bfd *abfd)
6728 /* Set the right machine number for an K1OM elf64 file. */
6729 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
6733 #undef TARGET_LITTLE_SYM
6734 #define TARGET_LITTLE_SYM k1om_elf64_vec
6735 #undef TARGET_LITTLE_NAME
6736 #define TARGET_LITTLE_NAME "elf64-k1om"
6738 #define ELF_ARCH bfd_arch_k1om
6740 #undef ELF_MACHINE_CODE
6741 #define ELF_MACHINE_CODE EM_K1OM
6746 #define elf64_bed elf64_k1om_bed
6748 #undef elf_backend_object_p
6749 #define elf_backend_object_p elf64_k1om_elf_object_p
6751 #undef elf_backend_static_tls_alignment
6753 #undef elf_backend_want_plt_sym
6754 #define elf_backend_want_plt_sym 0
6756 #include "elf64-target.h"
6758 /* FreeBSD K1OM support. */
6760 #undef TARGET_LITTLE_SYM
6761 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6762 #undef TARGET_LITTLE_NAME
6763 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6766 #define ELF_OSABI ELFOSABI_FREEBSD
6769 #define elf64_bed elf64_k1om_fbsd_bed
6771 #include "elf64-target.h"
6773 /* 32bit x86-64 support. */
6775 #undef TARGET_LITTLE_SYM
6776 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6777 #undef TARGET_LITTLE_NAME
6778 #define TARGET_LITTLE_NAME "elf32-x86-64"
6782 #define ELF_ARCH bfd_arch_i386
6784 #undef ELF_MACHINE_CODE
6785 #define ELF_MACHINE_CODE EM_X86_64
6789 #undef elf_backend_object_p
6790 #define elf_backend_object_p \
6791 elf32_x86_64_elf_object_p
6793 #undef elf_backend_bfd_from_remote_memory
6794 #define elf_backend_bfd_from_remote_memory \
6795 _bfd_elf32_bfd_from_remote_memory
6797 #undef elf_backend_size_info
6798 #define elf_backend_size_info \
6799 _bfd_elf32_size_info
6801 #include "elf32-target.h"