1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2016 Free Software Foundation, Inc.
3 Contributed by Jan Hubicka <jh@suse.cz>.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 #include "bfd_stdint.h"
32 #include "libiberty.h"
34 #include "opcode/i386.h"
35 #include "elf/x86-64.h"
42 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
43 #define MINUS_ONE (~ (bfd_vma) 0)
45 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
46 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
47 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
48 since they are the same. */
50 #define ABI_64_P(abfd) \
51 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
53 /* The relocation "howto" table. Order of fields:
54 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
55 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
56 static reloc_howto_type x86_64_elf_howto_table[] =
58 HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
59 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
61 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
64 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
65 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
67 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
68 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
70 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
71 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
73 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
76 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
79 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
82 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
85 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
86 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
88 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
89 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
91 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
92 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
94 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
96 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
97 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
98 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
100 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
101 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
102 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
105 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
108 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
111 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
112 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
114 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
115 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
117 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
118 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
120 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
121 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
123 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
124 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
126 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
129 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
131 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
132 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
133 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
134 FALSE, 0xffffffff, 0xffffffff, TRUE),
135 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
136 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
138 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
139 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
141 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
142 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
143 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
144 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
145 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
147 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
148 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
150 HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
151 bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff,
153 HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned,
154 bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE,
156 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
157 complain_overflow_bitfield, bfd_elf_generic_reloc,
158 "R_X86_64_GOTPC32_TLSDESC",
159 FALSE, 0xffffffff, 0xffffffff, TRUE),
160 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
161 complain_overflow_dont, bfd_elf_generic_reloc,
162 "R_X86_64_TLSDESC_CALL",
164 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
165 complain_overflow_bitfield, bfd_elf_generic_reloc,
167 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
168 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
171 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
172 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
174 HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
175 bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff,
177 HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
178 bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff,
180 HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
181 bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff,
183 HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
184 bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff,
187 /* We have a gap in the reloc numbers here.
188 R_X86_64_standard counts the number up to this point, and
189 R_X86_64_vt_offset is the value to subtract from a reloc type of
190 R_X86_64_GNU_VT* to form an index into this table. */
191 #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1)
192 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
194 /* GNU extension to record C++ vtable hierarchy. */
195 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
196 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
198 /* GNU extension to record C++ vtable member usage. */
199 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
200 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
203 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
204 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
205 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
209 #define IS_X86_64_PCREL_TYPE(TYPE) \
210 ( ((TYPE) == R_X86_64_PC8) \
211 || ((TYPE) == R_X86_64_PC16) \
212 || ((TYPE) == R_X86_64_PC32) \
213 || ((TYPE) == R_X86_64_PC32_BND) \
214 || ((TYPE) == R_X86_64_PC64))
216 /* Map BFD relocs to the x86_64 elf relocs. */
219 bfd_reloc_code_real_type bfd_reloc_val;
220 unsigned char elf_reloc_val;
223 static const struct elf_reloc_map x86_64_reloc_map[] =
225 { BFD_RELOC_NONE, R_X86_64_NONE, },
226 { BFD_RELOC_64, R_X86_64_64, },
227 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
228 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
229 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
230 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
231 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
232 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
233 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
234 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
235 { BFD_RELOC_32, R_X86_64_32, },
236 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
237 { BFD_RELOC_16, R_X86_64_16, },
238 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
239 { BFD_RELOC_8, R_X86_64_8, },
240 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
241 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
242 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
243 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
244 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
245 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
246 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
247 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
248 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
249 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
250 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
251 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
252 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
253 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
254 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
255 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
256 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
257 { BFD_RELOC_SIZE32, R_X86_64_SIZE32, },
258 { BFD_RELOC_SIZE64, R_X86_64_SIZE64, },
259 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
260 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
261 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
262 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
263 { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, },
264 { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, },
265 { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, },
266 { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, },
267 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
268 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
271 static reloc_howto_type *
272 elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
276 if (r_type == (unsigned int) R_X86_64_32)
281 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
283 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
284 || r_type >= (unsigned int) R_X86_64_max)
286 if (r_type >= (unsigned int) R_X86_64_standard)
288 (*_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 eh->plt_got.offset = (bfd_vma) -1;
2727 h->plt.offset = (bfd_vma) -1;
2733 eh->plt_got.offset = (bfd_vma) -1;
2734 h->plt.offset = (bfd_vma) -1;
2738 eh->tlsdesc_got = (bfd_vma) -1;
2740 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2741 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2742 if (h->got.refcount > 0
2743 && bfd_link_executable (info)
2745 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
2747 h->got.offset = (bfd_vma) -1;
2749 else if (h->got.refcount > 0)
2753 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
2755 /* Make sure this symbol is output as a dynamic symbol.
2756 Undefined weak syms won't yet be marked as dynamic. */
2757 if (h->dynindx == -1
2758 && !h->forced_local)
2760 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2764 if (GOT_TLS_GDESC_P (tls_type))
2766 eh->tlsdesc_got = htab->elf.sgotplt->size
2767 - elf_x86_64_compute_jump_table_size (htab);
2768 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
2769 h->got.offset = (bfd_vma) -2;
2771 if (! GOT_TLS_GDESC_P (tls_type)
2772 || GOT_TLS_GD_P (tls_type))
2775 h->got.offset = s->size;
2776 s->size += GOT_ENTRY_SIZE;
2777 if (GOT_TLS_GD_P (tls_type))
2778 s->size += GOT_ENTRY_SIZE;
2780 dyn = htab->elf.dynamic_sections_created;
2781 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2783 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2784 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2785 || tls_type == GOT_TLS_IE)
2786 htab->elf.srelgot->size += bed->s->sizeof_rela;
2787 else if (GOT_TLS_GD_P (tls_type))
2788 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
2789 else if (! GOT_TLS_GDESC_P (tls_type)
2790 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2791 || h->root.type != bfd_link_hash_undefweak)
2792 && (bfd_link_pic (info)
2793 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2794 htab->elf.srelgot->size += bed->s->sizeof_rela;
2795 if (GOT_TLS_GDESC_P (tls_type))
2797 htab->elf.srelplt->size += bed->s->sizeof_rela;
2798 htab->tlsdesc_plt = (bfd_vma) -1;
2802 h->got.offset = (bfd_vma) -1;
2804 if (eh->dyn_relocs == NULL)
2807 /* In the shared -Bsymbolic case, discard space allocated for
2808 dynamic pc-relative relocs against symbols which turn out to be
2809 defined in regular objects. For the normal shared case, discard
2810 space for pc-relative relocs that have become local due to symbol
2811 visibility changes. */
2813 if (bfd_link_pic (info))
2815 /* Relocs that use pc_count are those that appear on a call
2816 insn, or certain REL relocs that can generated via assembly.
2817 We want calls to protected symbols to resolve directly to the
2818 function rather than going via the plt. If people want
2819 function pointer comparisons to work as expected then they
2820 should avoid writing weird assembly. */
2821 if (SYMBOL_CALLS_LOCAL (info, h))
2823 struct elf_dyn_relocs **pp;
2825 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2827 p->count -= p->pc_count;
2836 /* Also discard relocs on undefined weak syms with non-default
2838 if (eh->dyn_relocs != NULL)
2840 if (h->root.type == bfd_link_hash_undefweak)
2842 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2843 eh->dyn_relocs = NULL;
2845 /* Make sure undefined weak symbols are output as a dynamic
2847 else if (h->dynindx == -1
2848 && ! h->forced_local
2849 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2852 /* For PIE, discard space for pc-relative relocs against
2853 symbols which turn out to need copy relocs. */
2854 else if (bfd_link_executable (info)
2855 && (h->needs_copy || eh->needs_copy)
2859 struct elf_dyn_relocs **pp;
2861 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2863 if (p->pc_count != 0)
2871 else if (ELIMINATE_COPY_RELOCS)
2873 /* For the non-shared case, discard space for relocs against
2874 symbols which turn out to need copy relocs or are not
2875 dynamic. Keep dynamic relocations for run-time function
2876 pointer initialization. */
2878 if ((!h->non_got_ref || eh->func_pointer_refcount > 0)
2881 || (htab->elf.dynamic_sections_created
2882 && (h->root.type == bfd_link_hash_undefweak
2883 || h->root.type == bfd_link_hash_undefined))))
2885 /* Make sure this symbol is output as a dynamic symbol.
2886 Undefined weak syms won't yet be marked as dynamic. */
2887 if (h->dynindx == -1
2888 && ! h->forced_local
2889 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2892 /* If that succeeded, we know we'll be keeping all the
2894 if (h->dynindx != -1)
2898 eh->dyn_relocs = NULL;
2899 eh->func_pointer_refcount = 0;
2904 /* Finally, allocate space. */
2905 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2909 sreloc = elf_section_data (p->sec)->sreloc;
2911 BFD_ASSERT (sreloc != NULL);
2913 sreloc->size += p->count * bed->s->sizeof_rela;
2919 /* Allocate space in .plt, .got and associated reloc sections for
2920 local dynamic relocs. */
2923 elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
2925 struct elf_link_hash_entry *h
2926 = (struct elf_link_hash_entry *) *slot;
2928 if (h->type != STT_GNU_IFUNC
2932 || h->root.type != bfd_link_hash_defined)
2935 return elf_x86_64_allocate_dynrelocs (h, inf);
2938 /* Find any dynamic relocs that apply to read-only sections. */
2941 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2944 struct elf_x86_64_link_hash_entry *eh;
2945 struct elf_dyn_relocs *p;
2947 /* Skip local IFUNC symbols. */
2948 if (h->forced_local && h->type == STT_GNU_IFUNC)
2951 eh = (struct elf_x86_64_link_hash_entry *) h;
2952 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2954 asection *s = p->sec->output_section;
2956 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2958 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2960 info->flags |= DF_TEXTREL;
2962 if ((info->warn_shared_textrel && bfd_link_pic (info))
2963 || info->error_textrel)
2964 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2965 p->sec->owner, h->root.root.string,
2968 /* Not an error, just cut short the traversal. */
2975 /* With the local symbol, foo, we convert
2976 mov foo@GOTPCREL(%rip), %reg
2980 call/jmp *foo@GOTPCREL(%rip)
2982 nop call foo/jmp foo nop
2983 When PIC is false, convert
2984 test %reg, foo@GOTPCREL(%rip)
2988 binop foo@GOTPCREL(%rip), %reg
2991 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
2995 elf_x86_64_convert_load (bfd *abfd, asection *sec,
2996 struct bfd_link_info *link_info)
2998 Elf_Internal_Shdr *symtab_hdr;
2999 Elf_Internal_Rela *internal_relocs;
3000 Elf_Internal_Rela *irel, *irelend;
3002 struct elf_x86_64_link_hash_table *htab;
3003 bfd_boolean changed_contents;
3004 bfd_boolean changed_relocs;
3005 bfd_signed_vma *local_got_refcounts;
3006 bfd_vma maxpagesize;
3008 /* Don't even try to convert non-ELF outputs. */
3009 if (!is_elf_hash_table (link_info->hash))
3012 /* Nothing to do if there is no need or no output. */
3013 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
3014 || sec->need_convert_load == 0
3015 || bfd_is_abs_section (sec->output_section))
3018 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3020 /* Load the relocations for this section. */
3021 internal_relocs = (_bfd_elf_link_read_relocs
3022 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3023 link_info->keep_memory));
3024 if (internal_relocs == NULL)
3027 htab = elf_x86_64_hash_table (link_info);
3028 changed_contents = FALSE;
3029 changed_relocs = FALSE;
3030 local_got_refcounts = elf_local_got_refcounts (abfd);
3031 maxpagesize = get_elf_backend_data (abfd)->maxpagesize;
3033 /* Get the section contents. */
3034 if (elf_section_data (sec)->this_hdr.contents != NULL)
3035 contents = elf_section_data (sec)->this_hdr.contents;
3038 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3042 irelend = internal_relocs + sec->reloc_count;
3043 for (irel = internal_relocs; irel < irelend; irel++)
3045 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3046 unsigned int r_symndx = htab->r_sym (irel->r_info);
3048 struct elf_link_hash_entry *h;
3052 bfd_signed_vma raddend;
3053 unsigned int opcode;
3056 if (r_type != R_X86_64_GOTPCREL
3057 && r_type != R_X86_64_GOTPCRELX
3058 && r_type != R_X86_64_REX_GOTPCRELX)
3061 roff = irel->r_offset;
3062 if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))
3065 raddend = irel->r_addend;
3066 /* Addend for 32-bit PC-relative relocation must be -4. */
3070 opcode = bfd_get_8 (abfd, contents + roff - 2);
3072 /* It is OK to convert mov to lea. */
3075 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
3076 for mov call, jmp or one of adc, add, and, cmp, or, sbb,
3077 sub, test, xor instructions. */
3078 if (r_type != R_X86_64_GOTPCRELX
3079 && r_type != R_X86_64_REX_GOTPCRELX)
3082 /* It is OK to convert indirect branch to direct branch. */
3085 /* It is OK to convert adc, add, and, cmp, or, sbb, sub,
3086 test, xor only when PIC is false. */
3087 if (bfd_link_pic (link_info))
3092 /* Get the symbol referred to by the reloc. */
3093 if (r_symndx < symtab_hdr->sh_info)
3095 Elf_Internal_Sym *isym;
3097 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
3100 symtype = ELF_ST_TYPE (isym->st_info);
3102 /* STT_GNU_IFUNC must keep GOTPCREL relocations and skip
3103 relocation against undefined symbols. */
3104 if (symtype == STT_GNU_IFUNC || isym->st_shndx == SHN_UNDEF)
3107 if (isym->st_shndx == SHN_ABS)
3108 tsec = bfd_abs_section_ptr;
3109 else if (isym->st_shndx == SHN_COMMON)
3110 tsec = bfd_com_section_ptr;
3111 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
3112 tsec = &_bfd_elf_large_com_section;
3114 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3117 toff = isym->st_value;
3121 indx = r_symndx - symtab_hdr->sh_info;
3122 h = elf_sym_hashes (abfd)[indx];
3123 BFD_ASSERT (h != NULL);
3125 while (h->root.type == bfd_link_hash_indirect
3126 || h->root.type == bfd_link_hash_warning)
3127 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3129 /* STT_GNU_IFUNC must keep GOTPCREL relocations. We also
3130 avoid optimizing GOTPCREL relocations againt _DYNAMIC
3131 since ld.so may use its link-time address. */
3133 || h->root.type == bfd_link_hash_defined
3134 || h->root.type == bfd_link_hash_defweak)
3135 && h->type != STT_GNU_IFUNC
3136 && h != htab->elf.hdynamic
3137 && SYMBOL_REFERENCES_LOCAL (link_info, h))
3139 /* bfd_link_hash_new or bfd_link_hash_undefined is
3140 set by an assignment in a linker script in
3141 bfd_elf_record_link_assignment. FIXME: If we
3142 ever get a linker error due relocation overflow,
3143 we will skip this optimization. */
3145 && (h->root.type == bfd_link_hash_new
3146 || h->root.type == bfd_link_hash_undefined))
3148 tsec = h->root.u.def.section;
3149 toff = h->root.u.def.value;
3156 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
3158 /* At this stage in linking, no SEC_MERGE symbol has been
3159 adjusted, so all references to such symbols need to be
3160 passed through _bfd_merged_section_offset. (Later, in
3161 relocate_section, all SEC_MERGE symbols *except* for
3162 section symbols have been adjusted.)
3164 gas may reduce relocations against symbols in SEC_MERGE
3165 sections to a relocation against the section symbol when
3166 the original addend was zero. When the reloc is against
3167 a section symbol we should include the addend in the
3168 offset passed to _bfd_merged_section_offset, since the
3169 location of interest is the original symbol. On the
3170 other hand, an access to "sym+addend" where "sym" is not
3171 a section symbol should not include the addend; Such an
3172 access is presumed to be an offset from "sym"; The
3173 location of interest is just "sym". */
3174 if (symtype == STT_SECTION)
3177 toff = _bfd_merged_section_offset (abfd, &tsec,
3178 elf_section_data (tsec)->sec_info,
3181 if (symtype != STT_SECTION)
3187 /* Don't convert if R_X86_64_PC32 relocation overflows. */
3188 if (tsec->output_section == sec->output_section)
3190 if ((toff - roff + 0x80000000) > 0xffffffff)
3195 bfd_signed_vma distance;
3197 /* At this point, we don't know the load addresses of TSEC
3198 section nor SEC section. We estimate the distrance between
3199 SEC and TSEC. We store the estimated distances in the
3200 compressed_size field of the output section, which is only
3201 used to decompress the compressed input section. */
3202 if (sec->output_section->compressed_size == 0)
3205 bfd_size_type size = 0;
3206 for (asect = link_info->output_bfd->sections;
3208 asect = asect->next)
3211 for (i = asect->map_head.s;
3215 size = align_power (size, i->alignment_power);
3218 asect->compressed_size = size;
3222 /* Don't convert GOTPCREL relocations if TSEC isn't placed
3224 distance = (tsec->output_section->compressed_size
3225 - sec->output_section->compressed_size);
3229 /* Take PT_GNU_RELRO segment into account by adding
3231 if ((toff + distance + maxpagesize - roff + 0x80000000)
3239 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
3244 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
3246 modrm = bfd_get_8 (abfd, contents + roff - 1);
3249 /* Convert to "jmp foo nop". */
3252 nop_offset = irel->r_offset + 3;
3253 disp = bfd_get_32 (abfd, contents + irel->r_offset);
3254 irel->r_offset -= 1;
3255 bfd_put_32 (abfd, disp, contents + irel->r_offset);
3259 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
3262 nop = link_info->call_nop_byte;
3263 if (link_info->call_nop_as_suffix)
3265 nop_offset = irel->r_offset + 3;
3266 disp = bfd_get_32 (abfd, contents + irel->r_offset);
3267 irel->r_offset -= 1;
3268 bfd_put_32 (abfd, disp, contents + irel->r_offset);
3271 nop_offset = irel->r_offset - 2;
3273 bfd_put_8 (abfd, nop, contents + nop_offset);
3274 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
3275 r_type = R_X86_64_PC32;
3281 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
3282 "lea foo(%rip), %reg". */
3284 r_type = R_X86_64_PC32;
3288 modrm = bfd_get_8 (abfd, contents + roff - 1);
3291 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
3292 "test $foo, %reg". */
3293 modrm = 0xc0 | (modrm & 0x38) >> 3;
3298 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
3299 "binop $foo, %reg". */
3300 modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c);
3303 bfd_put_8 (abfd, modrm, contents + roff - 1);
3305 if (r_type == R_X86_64_REX_GOTPCRELX)
3307 /* Move the R bit to the B bit in REX byte. */
3308 unsigned int rex = bfd_get_8 (abfd, contents + roff - 3);
3309 rex = (rex & ~REX_R) | (rex & REX_R) >> 2;
3310 bfd_put_8 (abfd, rex, contents + roff - 3);
3312 /* No addend for R_X86_64_32S relocation. */
3314 r_type = R_X86_64_32S;
3317 bfd_put_8 (abfd, opcode, contents + roff - 2);
3320 irel->r_info = htab->r_info (r_symndx, r_type);
3321 changed_contents = TRUE;
3322 changed_relocs = TRUE;
3326 if (h->got.refcount > 0)
3327 h->got.refcount -= 1;
3331 if (local_got_refcounts != NULL
3332 && local_got_refcounts[r_symndx] > 0)
3333 local_got_refcounts[r_symndx] -= 1;
3337 if (contents != NULL
3338 && elf_section_data (sec)->this_hdr.contents != contents)
3340 if (!changed_contents && !link_info->keep_memory)
3344 /* Cache the section contents for elf_link_input_bfd. */
3345 elf_section_data (sec)->this_hdr.contents = contents;
3349 if (elf_section_data (sec)->relocs != internal_relocs)
3351 if (!changed_relocs)
3352 free (internal_relocs);
3354 elf_section_data (sec)->relocs = internal_relocs;
3360 if (contents != NULL
3361 && elf_section_data (sec)->this_hdr.contents != contents)
3363 if (internal_relocs != NULL
3364 && elf_section_data (sec)->relocs != internal_relocs)
3365 free (internal_relocs);
3369 /* Set the sizes of the dynamic sections. */
3372 elf_x86_64_size_dynamic_sections (bfd *output_bfd,
3373 struct bfd_link_info *info)
3375 struct elf_x86_64_link_hash_table *htab;
3380 const struct elf_backend_data *bed;
3382 htab = elf_x86_64_hash_table (info);
3385 bed = get_elf_backend_data (output_bfd);
3387 dynobj = htab->elf.dynobj;
3391 if (htab->elf.dynamic_sections_created)
3393 /* Set the contents of the .interp section to the interpreter. */
3394 if (bfd_link_executable (info) && !info->nointerp)
3396 s = bfd_get_linker_section (dynobj, ".interp");
3399 s->size = htab->dynamic_interpreter_size;
3400 s->contents = (unsigned char *) htab->dynamic_interpreter;
3404 /* Set up .got offsets for local syms, and space for local dynamic
3406 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3408 bfd_signed_vma *local_got;
3409 bfd_signed_vma *end_local_got;
3410 char *local_tls_type;
3411 bfd_vma *local_tlsdesc_gotent;
3412 bfd_size_type locsymcount;
3413 Elf_Internal_Shdr *symtab_hdr;
3416 if (! is_x86_64_elf (ibfd))
3419 for (s = ibfd->sections; s != NULL; s = s->next)
3421 struct elf_dyn_relocs *p;
3423 if (!elf_x86_64_convert_load (ibfd, s, info))
3426 for (p = (struct elf_dyn_relocs *)
3427 (elf_section_data (s)->local_dynrel);
3431 if (!bfd_is_abs_section (p->sec)
3432 && bfd_is_abs_section (p->sec->output_section))
3434 /* Input section has been discarded, either because
3435 it is a copy of a linkonce section or due to
3436 linker script /DISCARD/, so we'll be discarding
3439 else if (p->count != 0)
3441 srel = elf_section_data (p->sec)->sreloc;
3442 srel->size += p->count * bed->s->sizeof_rela;
3443 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3444 && (info->flags & DF_TEXTREL) == 0)
3446 info->flags |= DF_TEXTREL;
3447 if ((info->warn_shared_textrel && bfd_link_pic (info))
3448 || info->error_textrel)
3449 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3450 p->sec->owner, p->sec);
3456 local_got = elf_local_got_refcounts (ibfd);
3460 symtab_hdr = &elf_symtab_hdr (ibfd);
3461 locsymcount = symtab_hdr->sh_info;
3462 end_local_got = local_got + locsymcount;
3463 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
3464 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
3466 srel = htab->elf.srelgot;
3467 for (; local_got < end_local_got;
3468 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3470 *local_tlsdesc_gotent = (bfd_vma) -1;
3473 if (GOT_TLS_GDESC_P (*local_tls_type))
3475 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3476 - elf_x86_64_compute_jump_table_size (htab);
3477 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3478 *local_got = (bfd_vma) -2;
3480 if (! GOT_TLS_GDESC_P (*local_tls_type)
3481 || GOT_TLS_GD_P (*local_tls_type))
3483 *local_got = s->size;
3484 s->size += GOT_ENTRY_SIZE;
3485 if (GOT_TLS_GD_P (*local_tls_type))
3486 s->size += GOT_ENTRY_SIZE;
3488 if (bfd_link_pic (info)
3489 || GOT_TLS_GD_ANY_P (*local_tls_type)
3490 || *local_tls_type == GOT_TLS_IE)
3492 if (GOT_TLS_GDESC_P (*local_tls_type))
3494 htab->elf.srelplt->size
3495 += bed->s->sizeof_rela;
3496 htab->tlsdesc_plt = (bfd_vma) -1;
3498 if (! GOT_TLS_GDESC_P (*local_tls_type)
3499 || GOT_TLS_GD_P (*local_tls_type))
3500 srel->size += bed->s->sizeof_rela;
3504 *local_got = (bfd_vma) -1;
3508 if (htab->tls_ld_got.refcount > 0)
3510 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3512 htab->tls_ld_got.offset = htab->elf.sgot->size;
3513 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
3514 htab->elf.srelgot->size += bed->s->sizeof_rela;
3517 htab->tls_ld_got.offset = -1;
3519 /* Allocate global sym .plt and .got entries, and space for global
3520 sym dynamic relocs. */
3521 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
3524 /* Allocate .plt and .got entries, and space for local symbols. */
3525 htab_traverse (htab->loc_hash_table,
3526 elf_x86_64_allocate_local_dynrelocs,
3529 /* For every jump slot reserved in the sgotplt, reloc_count is
3530 incremented. However, when we reserve space for TLS descriptors,
3531 it's not incremented, so in order to compute the space reserved
3532 for them, it suffices to multiply the reloc count by the jump
3535 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3536 so that R_X86_64_IRELATIVE entries come last. */
3537 if (htab->elf.srelplt)
3539 htab->sgotplt_jump_table_size
3540 = elf_x86_64_compute_jump_table_size (htab);
3541 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3543 else if (htab->elf.irelplt)
3544 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3546 if (htab->tlsdesc_plt)
3548 /* If we're not using lazy TLS relocations, don't generate the
3549 PLT and GOT entries they require. */
3550 if ((info->flags & DF_BIND_NOW))
3551 htab->tlsdesc_plt = 0;
3554 htab->tlsdesc_got = htab->elf.sgot->size;
3555 htab->elf.sgot->size += GOT_ENTRY_SIZE;
3556 /* Reserve room for the initial entry.
3557 FIXME: we could probably do away with it in this case. */
3558 if (htab->elf.splt->size == 0)
3559 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
3560 htab->tlsdesc_plt = htab->elf.splt->size;
3561 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
3565 if (htab->elf.sgotplt)
3567 /* Don't allocate .got.plt section if there are no GOT nor PLT
3568 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3569 if ((htab->elf.hgot == NULL
3570 || !htab->elf.hgot->ref_regular_nonweak)
3571 && (htab->elf.sgotplt->size
3572 == get_elf_backend_data (output_bfd)->got_header_size)
3573 && (htab->elf.splt == NULL
3574 || htab->elf.splt->size == 0)
3575 && (htab->elf.sgot == NULL
3576 || htab->elf.sgot->size == 0)
3577 && (htab->elf.iplt == NULL
3578 || htab->elf.iplt->size == 0)
3579 && (htab->elf.igotplt == NULL
3580 || htab->elf.igotplt->size == 0))
3581 htab->elf.sgotplt->size = 0;
3584 if (htab->plt_eh_frame != NULL
3585 && htab->elf.splt != NULL
3586 && htab->elf.splt->size != 0
3587 && !bfd_is_abs_section (htab->elf.splt->output_section)
3588 && _bfd_elf_eh_frame_present (info))
3590 const struct elf_x86_64_backend_data *arch_data
3591 = get_elf_x86_64_arch_data (bed);
3592 htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
3595 /* We now have determined the sizes of the various dynamic sections.
3596 Allocate memory for them. */
3598 for (s = dynobj->sections; s != NULL; s = s->next)
3600 if ((s->flags & SEC_LINKER_CREATED) == 0)
3603 if (s == htab->elf.splt
3604 || s == htab->elf.sgot
3605 || s == htab->elf.sgotplt
3606 || s == htab->elf.iplt
3607 || s == htab->elf.igotplt
3608 || s == htab->plt_bnd
3609 || s == htab->plt_got
3610 || s == htab->plt_eh_frame
3611 || s == htab->sdynbss)
3613 /* Strip this section if we don't need it; see the
3616 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
3618 if (s->size != 0 && s != htab->elf.srelplt)
3621 /* We use the reloc_count field as a counter if we need
3622 to copy relocs into the output file. */
3623 if (s != htab->elf.srelplt)
3628 /* It's not one of our sections, so don't allocate space. */
3634 /* If we don't need this section, strip it from the
3635 output file. This is mostly to handle .rela.bss and
3636 .rela.plt. We must create both sections in
3637 create_dynamic_sections, because they must be created
3638 before the linker maps input sections to output
3639 sections. The linker does that before
3640 adjust_dynamic_symbol is called, and it is that
3641 function which decides whether anything needs to go
3642 into these sections. */
3644 s->flags |= SEC_EXCLUDE;
3648 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3651 /* Allocate memory for the section contents. We use bfd_zalloc
3652 here in case unused entries are not reclaimed before the
3653 section's contents are written out. This should not happen,
3654 but this way if it does, we get a R_X86_64_NONE reloc instead
3656 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3657 if (s->contents == NULL)
3661 if (htab->plt_eh_frame != NULL
3662 && htab->plt_eh_frame->contents != NULL)
3664 const struct elf_x86_64_backend_data *arch_data
3665 = get_elf_x86_64_arch_data (bed);
3667 memcpy (htab->plt_eh_frame->contents,
3668 arch_data->eh_frame_plt, htab->plt_eh_frame->size);
3669 bfd_put_32 (dynobj, htab->elf.splt->size,
3670 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3673 if (htab->elf.dynamic_sections_created)
3675 /* Add some entries to the .dynamic section. We fill in the
3676 values later, in elf_x86_64_finish_dynamic_sections, but we
3677 must add the entries now so that we get the correct size for
3678 the .dynamic section. The DT_DEBUG entry is filled in by the
3679 dynamic linker and used by the debugger. */
3680 #define add_dynamic_entry(TAG, VAL) \
3681 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3683 if (bfd_link_executable (info))
3685 if (!add_dynamic_entry (DT_DEBUG, 0))
3689 if (htab->elf.splt->size != 0)
3691 /* DT_PLTGOT is used by prelink even if there is no PLT
3693 if (!add_dynamic_entry (DT_PLTGOT, 0))
3696 if (htab->elf.srelplt->size != 0)
3698 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3699 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3700 || !add_dynamic_entry (DT_JMPREL, 0))
3704 if (htab->tlsdesc_plt
3705 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3706 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3712 if (!add_dynamic_entry (DT_RELA, 0)
3713 || !add_dynamic_entry (DT_RELASZ, 0)
3714 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
3717 /* If any dynamic relocs apply to a read-only section,
3718 then we need a DT_TEXTREL entry. */
3719 if ((info->flags & DF_TEXTREL) == 0)
3720 elf_link_hash_traverse (&htab->elf,
3721 elf_x86_64_readonly_dynrelocs,
3724 if ((info->flags & DF_TEXTREL) != 0)
3726 if ((elf_tdata (output_bfd)->has_gnu_symbols
3727 & elf_gnu_symbol_ifunc) == elf_gnu_symbol_ifunc)
3729 info->callbacks->einfo
3730 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3731 bfd_set_error (bfd_error_bad_value);
3735 if (!add_dynamic_entry (DT_TEXTREL, 0))
3740 #undef add_dynamic_entry
3746 elf_x86_64_always_size_sections (bfd *output_bfd,
3747 struct bfd_link_info *info)
3749 asection *tls_sec = elf_hash_table (info)->tls_sec;
3753 struct elf_link_hash_entry *tlsbase;
3755 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3756 "_TLS_MODULE_BASE_",
3757 FALSE, FALSE, FALSE);
3759 if (tlsbase && tlsbase->type == STT_TLS)
3761 struct elf_x86_64_link_hash_table *htab;
3762 struct bfd_link_hash_entry *bh = NULL;
3763 const struct elf_backend_data *bed
3764 = get_elf_backend_data (output_bfd);
3766 htab = elf_x86_64_hash_table (info);
3770 if (!(_bfd_generic_link_add_one_symbol
3771 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3772 tls_sec, 0, NULL, FALSE,
3773 bed->collect, &bh)))
3776 htab->tls_module_base = bh;
3778 tlsbase = (struct elf_link_hash_entry *)bh;
3779 tlsbase->def_regular = 1;
3780 tlsbase->other = STV_HIDDEN;
3781 tlsbase->root.linker_def = 1;
3782 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3789 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3790 executables. Rather than setting it to the beginning of the TLS
3791 section, we have to set it to the end. This function may be called
3792 multiple times, it is idempotent. */
3795 elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
3797 struct elf_x86_64_link_hash_table *htab;
3798 struct bfd_link_hash_entry *base;
3800 if (!bfd_link_executable (info))
3803 htab = elf_x86_64_hash_table (info);
3807 base = htab->tls_module_base;
3811 base->u.def.value = htab->elf.tls_size;
3814 /* Return the base VMA address which should be subtracted from real addresses
3815 when resolving @dtpoff relocation.
3816 This is PT_TLS segment p_vaddr. */
3819 elf_x86_64_dtpoff_base (struct bfd_link_info *info)
3821 /* If tls_sec is NULL, we should have signalled an error already. */
3822 if (elf_hash_table (info)->tls_sec == NULL)
3824 return elf_hash_table (info)->tls_sec->vma;
3827 /* Return the relocation value for @tpoff relocation
3828 if STT_TLS virtual address is ADDRESS. */
3831 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
3833 struct elf_link_hash_table *htab = elf_hash_table (info);
3834 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3835 bfd_vma static_tls_size;
3837 /* If tls_segment is NULL, we should have signalled an error already. */
3838 if (htab->tls_sec == NULL)
3841 /* Consider special static TLS alignment requirements. */
3842 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3843 return address - static_tls_size - htab->tls_sec->vma;
3846 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3850 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3852 /* Opcode Instruction
3855 0x0f 0x8x conditional jump */
3857 && (contents [offset - 1] == 0xe8
3858 || contents [offset - 1] == 0xe9))
3860 && contents [offset - 2] == 0x0f
3861 && (contents [offset - 1] & 0xf0) == 0x80));
3865 elf_x86_64_need_pic (bfd *input_bfd, struct elf_link_hash_entry *h,
3866 reloc_howto_type *howto)
3870 const char *pic = "";
3872 switch (ELF_ST_VISIBILITY (h->other))
3875 v = _("hidden symbol");
3878 v = _("internal symbol");
3881 v = _("protected symbol");
3885 pic = _("; recompile with -fPIC");
3890 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3892 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3894 (*_bfd_error_handler) (fmt, input_bfd, howto->name,
3895 v, h->root.root.string, pic);
3896 bfd_set_error (bfd_error_bad_value);
3900 /* Relocate an x86_64 ELF section. */
3903 elf_x86_64_relocate_section (bfd *output_bfd,
3904 struct bfd_link_info *info,
3906 asection *input_section,
3908 Elf_Internal_Rela *relocs,
3909 Elf_Internal_Sym *local_syms,
3910 asection **local_sections)
3912 struct elf_x86_64_link_hash_table *htab;
3913 Elf_Internal_Shdr *symtab_hdr;
3914 struct elf_link_hash_entry **sym_hashes;
3915 bfd_vma *local_got_offsets;
3916 bfd_vma *local_tlsdesc_gotents;
3917 Elf_Internal_Rela *rel;
3918 Elf_Internal_Rela *wrel;
3919 Elf_Internal_Rela *relend;
3920 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
3922 BFD_ASSERT (is_x86_64_elf (input_bfd));
3924 htab = elf_x86_64_hash_table (info);
3927 symtab_hdr = &elf_symtab_hdr (input_bfd);
3928 sym_hashes = elf_sym_hashes (input_bfd);
3929 local_got_offsets = elf_local_got_offsets (input_bfd);
3930 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
3932 elf_x86_64_set_tls_module_base (info);
3934 rel = wrel = relocs;
3935 relend = relocs + input_section->reloc_count;
3936 for (; rel < relend; wrel++, rel++)
3938 unsigned int r_type;
3939 reloc_howto_type *howto;
3940 unsigned long r_symndx;
3941 struct elf_link_hash_entry *h;
3942 struct elf_x86_64_link_hash_entry *eh;
3943 Elf_Internal_Sym *sym;
3945 bfd_vma off, offplt, plt_offset;
3947 bfd_boolean unresolved_reloc;
3948 bfd_reloc_status_type r;
3950 asection *base_got, *resolved_plt;
3953 r_type = ELF32_R_TYPE (rel->r_info);
3954 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3955 || r_type == (int) R_X86_64_GNU_VTENTRY)
3962 if (r_type >= (int) R_X86_64_standard)
3964 (*_bfd_error_handler)
3965 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3966 input_bfd, input_section, r_type);
3967 bfd_set_error (bfd_error_bad_value);
3971 if (r_type != (int) R_X86_64_32
3972 || ABI_64_P (output_bfd))
3973 howto = x86_64_elf_howto_table + r_type;
3975 howto = (x86_64_elf_howto_table
3976 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
3977 r_symndx = htab->r_sym (rel->r_info);
3981 unresolved_reloc = FALSE;
3982 if (r_symndx < symtab_hdr->sh_info)
3984 sym = local_syms + r_symndx;
3985 sec = local_sections[r_symndx];
3987 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3989 st_size = sym->st_size;
3991 /* Relocate against local STT_GNU_IFUNC symbol. */
3992 if (!bfd_link_relocatable (info)
3993 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3995 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
4000 /* Set STT_GNU_IFUNC symbol value. */
4001 h->root.u.def.value = sym->st_value;
4002 h->root.u.def.section = sec;
4007 bfd_boolean warned ATTRIBUTE_UNUSED;
4008 bfd_boolean ignored ATTRIBUTE_UNUSED;
4010 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4011 r_symndx, symtab_hdr, sym_hashes,
4013 unresolved_reloc, warned, ignored);
4017 if (sec != NULL && discarded_section (sec))
4019 _bfd_clear_contents (howto, input_bfd, input_section,
4020 contents + rel->r_offset);
4021 wrel->r_offset = rel->r_offset;
4025 /* For ld -r, remove relocations in debug sections against
4026 sections defined in discarded sections. Not done for
4027 eh_frame editing code expects to be present. */
4028 if (bfd_link_relocatable (info)
4029 && (input_section->flags & SEC_DEBUGGING))
4035 if (bfd_link_relocatable (info))
4042 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
4044 if (r_type == R_X86_64_64)
4046 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
4047 zero-extend it to 64bit if addend is zero. */
4048 r_type = R_X86_64_32;
4049 memset (contents + rel->r_offset + 4, 0, 4);
4051 else if (r_type == R_X86_64_SIZE64)
4053 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
4054 zero-extend it to 64bit if addend is zero. */
4055 r_type = R_X86_64_SIZE32;
4056 memset (contents + rel->r_offset + 4, 0, 4);
4060 eh = (struct elf_x86_64_link_hash_entry *) h;
4062 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4063 it here if it is defined in a non-shared object. */
4065 && h->type == STT_GNU_IFUNC
4071 if ((input_section->flags & SEC_ALLOC) == 0)
4073 /* Dynamic relocs are not propagated for SEC_DEBUGGING
4074 sections because such sections are not SEC_ALLOC and
4075 thus ld.so will not process them. */
4076 if ((input_section->flags & SEC_DEBUGGING) != 0)
4080 else if (h->plt.offset == (bfd_vma) -1)
4083 /* STT_GNU_IFUNC symbol must go through PLT. */
4084 if (htab->elf.splt != NULL)
4086 if (htab->plt_bnd != NULL)
4088 resolved_plt = htab->plt_bnd;
4089 plt_offset = eh->plt_bnd.offset;
4093 resolved_plt = htab->elf.splt;
4094 plt_offset = h->plt.offset;
4099 resolved_plt = htab->elf.iplt;
4100 plt_offset = h->plt.offset;
4103 relocation = (resolved_plt->output_section->vma
4104 + resolved_plt->output_offset + plt_offset);
4109 if (h->root.root.string)
4110 name = h->root.root.string;
4112 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4114 (*_bfd_error_handler)
4115 (_("%B: relocation %s against STT_GNU_IFUNC "
4116 "symbol `%s' isn't handled by %s"), input_bfd,
4117 howto->name, name, __FUNCTION__);
4118 bfd_set_error (bfd_error_bad_value);
4122 if (bfd_link_pic (info))
4127 if (ABI_64_P (output_bfd))
4131 if (rel->r_addend != 0)
4133 if (h->root.root.string)
4134 name = h->root.root.string;
4136 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4138 (*_bfd_error_handler)
4139 (_("%B: relocation %s against STT_GNU_IFUNC "
4140 "symbol `%s' has non-zero addend: %d"),
4141 input_bfd, howto->name, name, rel->r_addend);
4142 bfd_set_error (bfd_error_bad_value);
4146 /* Generate dynamic relcoation only when there is a
4147 non-GOT reference in a shared object. */
4148 if (bfd_link_pic (info) && h->non_got_ref)
4150 Elf_Internal_Rela outrel;
4153 /* Need a dynamic relocation to get the real function
4155 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4159 if (outrel.r_offset == (bfd_vma) -1
4160 || outrel.r_offset == (bfd_vma) -2)
4163 outrel.r_offset += (input_section->output_section->vma
4164 + input_section->output_offset);
4166 if (h->dynindx == -1
4168 || bfd_link_executable (info))
4170 /* This symbol is resolved locally. */
4171 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4172 outrel.r_addend = (h->root.u.def.value
4173 + h->root.u.def.section->output_section->vma
4174 + h->root.u.def.section->output_offset);
4178 outrel.r_info = htab->r_info (h->dynindx, r_type);
4179 outrel.r_addend = 0;
4182 sreloc = htab->elf.irelifunc;
4183 elf_append_rela (output_bfd, sreloc, &outrel);
4185 /* If this reloc is against an external symbol, we
4186 do not want to fiddle with the addend. Otherwise,
4187 we need to include the symbol value so that it
4188 becomes an addend for the dynamic reloc. For an
4189 internal symbol, we have updated addend. */
4194 case R_X86_64_PC32_BND:
4196 case R_X86_64_PLT32:
4197 case R_X86_64_PLT32_BND:
4200 case R_X86_64_GOTPCREL:
4201 case R_X86_64_GOTPCRELX:
4202 case R_X86_64_REX_GOTPCRELX:
4203 case R_X86_64_GOTPCREL64:
4204 base_got = htab->elf.sgot;
4205 off = h->got.offset;
4207 if (base_got == NULL)
4210 if (off == (bfd_vma) -1)
4212 /* We can't use h->got.offset here to save state, or
4213 even just remember the offset, as finish_dynamic_symbol
4214 would use that as offset into .got. */
4216 if (htab->elf.splt != NULL)
4218 plt_index = h->plt.offset / plt_entry_size - 1;
4219 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4220 base_got = htab->elf.sgotplt;
4224 plt_index = h->plt.offset / plt_entry_size;
4225 off = plt_index * GOT_ENTRY_SIZE;
4226 base_got = htab->elf.igotplt;
4229 if (h->dynindx == -1
4233 /* This references the local defitionion. We must
4234 initialize this entry in the global offset table.
4235 Since the offset must always be a multiple of 8,
4236 we use the least significant bit to record
4237 whether we have initialized it already.
4239 When doing a dynamic link, we create a .rela.got
4240 relocation entry to initialize the value. This
4241 is done in the finish_dynamic_symbol routine. */
4246 bfd_put_64 (output_bfd, relocation,
4247 base_got->contents + off);
4248 /* Note that this is harmless for the GOTPLT64
4249 case, as -1 | 1 still is -1. */
4255 relocation = (base_got->output_section->vma
4256 + base_got->output_offset + off);
4262 /* When generating a shared object, the relocations handled here are
4263 copied into the output file to be resolved at run time. */
4266 case R_X86_64_GOT32:
4267 case R_X86_64_GOT64:
4268 /* Relocation is to the entry for this symbol in the global
4270 case R_X86_64_GOTPCREL:
4271 case R_X86_64_GOTPCRELX:
4272 case R_X86_64_REX_GOTPCRELX:
4273 case R_X86_64_GOTPCREL64:
4274 /* Use global offset table entry as symbol value. */
4275 case R_X86_64_GOTPLT64:
4276 /* This is obsolete and treated the the same as GOT64. */
4277 base_got = htab->elf.sgot;
4279 if (htab->elf.sgot == NULL)
4286 off = h->got.offset;
4288 && h->plt.offset != (bfd_vma)-1
4289 && off == (bfd_vma)-1)
4291 /* We can't use h->got.offset here to save
4292 state, or even just remember the offset, as
4293 finish_dynamic_symbol would use that as offset into
4295 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
4296 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4297 base_got = htab->elf.sgotplt;
4300 dyn = htab->elf.dynamic_sections_created;
4302 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
4303 || (bfd_link_pic (info)
4304 && SYMBOL_REFERENCES_LOCAL (info, h))
4305 || (ELF_ST_VISIBILITY (h->other)
4306 && h->root.type == bfd_link_hash_undefweak))
4308 /* This is actually a static link, or it is a -Bsymbolic
4309 link and the symbol is defined locally, or the symbol
4310 was forced to be local because of a version file. We
4311 must initialize this entry in the global offset table.
4312 Since the offset must always be a multiple of 8, we
4313 use the least significant bit to record whether we
4314 have initialized it already.
4316 When doing a dynamic link, we create a .rela.got
4317 relocation entry to initialize the value. This is
4318 done in the finish_dynamic_symbol routine. */
4323 bfd_put_64 (output_bfd, relocation,
4324 base_got->contents + off);
4325 /* Note that this is harmless for the GOTPLT64 case,
4326 as -1 | 1 still is -1. */
4331 unresolved_reloc = FALSE;
4335 if (local_got_offsets == NULL)
4338 off = local_got_offsets[r_symndx];
4340 /* The offset must always be a multiple of 8. We use
4341 the least significant bit to record whether we have
4342 already generated the necessary reloc. */
4347 bfd_put_64 (output_bfd, relocation,
4348 base_got->contents + off);
4350 if (bfd_link_pic (info))
4353 Elf_Internal_Rela outrel;
4355 /* We need to generate a R_X86_64_RELATIVE reloc
4356 for the dynamic linker. */
4357 s = htab->elf.srelgot;
4361 outrel.r_offset = (base_got->output_section->vma
4362 + base_got->output_offset
4364 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4365 outrel.r_addend = relocation;
4366 elf_append_rela (output_bfd, s, &outrel);
4369 local_got_offsets[r_symndx] |= 1;
4373 if (off >= (bfd_vma) -2)
4376 relocation = base_got->output_section->vma
4377 + base_got->output_offset + off;
4378 if (r_type != R_X86_64_GOTPCREL
4379 && r_type != R_X86_64_GOTPCRELX
4380 && r_type != R_X86_64_REX_GOTPCRELX
4381 && r_type != R_X86_64_GOTPCREL64)
4382 relocation -= htab->elf.sgotplt->output_section->vma
4383 - htab->elf.sgotplt->output_offset;
4387 case R_X86_64_GOTOFF64:
4388 /* Relocation is relative to the start of the global offset
4391 /* Check to make sure it isn't a protected function or data
4392 symbol for shared library since it may not be local when
4393 used as function address or with copy relocation. We also
4394 need to make sure that a symbol is referenced locally. */
4395 if (bfd_link_pic (info) && h)
4397 if (!h->def_regular)
4401 switch (ELF_ST_VISIBILITY (h->other))
4404 v = _("hidden symbol");
4407 v = _("internal symbol");
4410 v = _("protected symbol");
4417 (*_bfd_error_handler)
4418 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s `%s' can not be used when making a shared object"),
4419 input_bfd, v, h->root.root.string);
4420 bfd_set_error (bfd_error_bad_value);
4423 else if (!bfd_link_executable (info)
4424 && !SYMBOL_REFERENCES_LOCAL (info, h)
4425 && (h->type == STT_FUNC
4426 || h->type == STT_OBJECT)
4427 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4429 (*_bfd_error_handler)
4430 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s `%s' can not be used when making a shared object"),
4432 h->type == STT_FUNC ? "function" : "data",
4433 h->root.root.string);
4434 bfd_set_error (bfd_error_bad_value);
4439 /* Note that sgot is not involved in this
4440 calculation. We always want the start of .got.plt. If we
4441 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4442 permitted by the ABI, we might have to change this
4444 relocation -= htab->elf.sgotplt->output_section->vma
4445 + htab->elf.sgotplt->output_offset;
4448 case R_X86_64_GOTPC32:
4449 case R_X86_64_GOTPC64:
4450 /* Use global offset table as symbol value. */
4451 relocation = htab->elf.sgotplt->output_section->vma
4452 + htab->elf.sgotplt->output_offset;
4453 unresolved_reloc = FALSE;
4456 case R_X86_64_PLTOFF64:
4457 /* Relocation is PLT entry relative to GOT. For local
4458 symbols it's the symbol itself relative to GOT. */
4460 /* See PLT32 handling. */
4461 && h->plt.offset != (bfd_vma) -1
4462 && htab->elf.splt != NULL)
4464 if (htab->plt_bnd != NULL)
4466 resolved_plt = htab->plt_bnd;
4467 plt_offset = eh->plt_bnd.offset;
4471 resolved_plt = htab->elf.splt;
4472 plt_offset = h->plt.offset;
4475 relocation = (resolved_plt->output_section->vma
4476 + resolved_plt->output_offset
4478 unresolved_reloc = FALSE;
4481 relocation -= htab->elf.sgotplt->output_section->vma
4482 + htab->elf.sgotplt->output_offset;
4485 case R_X86_64_PLT32:
4486 case R_X86_64_PLT32_BND:
4487 /* Relocation is to the entry for this symbol in the
4488 procedure linkage table. */
4490 /* Resolve a PLT32 reloc against a local symbol directly,
4491 without using the procedure linkage table. */
4495 if ((h->plt.offset == (bfd_vma) -1
4496 && eh->plt_got.offset == (bfd_vma) -1)
4497 || htab->elf.splt == NULL)
4499 /* We didn't make a PLT entry for this symbol. This
4500 happens when statically linking PIC code, or when
4501 using -Bsymbolic. */
4505 if (h->plt.offset != (bfd_vma) -1)
4507 if (htab->plt_bnd != NULL)
4509 resolved_plt = htab->plt_bnd;
4510 plt_offset = eh->plt_bnd.offset;
4514 resolved_plt = htab->elf.splt;
4515 plt_offset = h->plt.offset;
4520 /* Use the GOT PLT. */
4521 resolved_plt = htab->plt_got;
4522 plt_offset = eh->plt_got.offset;
4525 relocation = (resolved_plt->output_section->vma
4526 + resolved_plt->output_offset
4528 unresolved_reloc = FALSE;
4531 case R_X86_64_SIZE32:
4532 case R_X86_64_SIZE64:
4533 /* Set to symbol size. */
4534 relocation = st_size;
4540 case R_X86_64_PC32_BND:
4541 /* Don't complain about -fPIC if the symbol is undefined when
4542 building executable. */
4543 if (bfd_link_pic (info)
4544 && (input_section->flags & SEC_ALLOC) != 0
4545 && (input_section->flags & SEC_READONLY) != 0
4547 && !(bfd_link_executable (info)
4548 && h->root.type == bfd_link_hash_undefined))
4550 bfd_boolean fail = FALSE;
4552 = ((r_type == R_X86_64_PC32
4553 || r_type == R_X86_64_PC32_BND)
4554 && is_32bit_relative_branch (contents, rel->r_offset));
4556 if (SYMBOL_REFERENCES_LOCAL (info, h))
4558 /* Symbol is referenced locally. Make sure it is
4559 defined locally or for a branch. */
4560 fail = !h->def_regular && !branch;
4562 else if (!(bfd_link_executable (info)
4563 && (h->needs_copy || eh->needs_copy)))
4565 /* Symbol doesn't need copy reloc and isn't referenced
4566 locally. We only allow branch to symbol with
4567 non-default visibility. */
4569 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
4573 return elf_x86_64_need_pic (input_bfd, h, howto);
4582 /* FIXME: The ABI says the linker should make sure the value is
4583 the same when it's zeroextended to 64 bit. */
4586 if ((input_section->flags & SEC_ALLOC) == 0)
4589 /* Don't copy a pc-relative relocation into the output file
4590 if the symbol needs copy reloc or the symbol is undefined
4591 when building executable. Copy dynamic function pointer
4593 if ((bfd_link_pic (info)
4594 && !(bfd_link_executable (info)
4598 || h->root.type == bfd_link_hash_undefined)
4599 && IS_X86_64_PCREL_TYPE (r_type))
4601 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4602 || h->root.type != bfd_link_hash_undefweak)
4603 && ((! IS_X86_64_PCREL_TYPE (r_type)
4604 && r_type != R_X86_64_SIZE32
4605 && r_type != R_X86_64_SIZE64)
4606 || ! SYMBOL_CALLS_LOCAL (info, h)))
4607 || (ELIMINATE_COPY_RELOCS
4608 && !bfd_link_pic (info)
4611 && (!h->non_got_ref || eh->func_pointer_refcount > 0)
4614 || h->root.type == bfd_link_hash_undefweak
4615 || h->root.type == bfd_link_hash_undefined)))
4617 Elf_Internal_Rela outrel;
4618 bfd_boolean skip, relocate;
4621 /* When generating a shared object, these relocations
4622 are copied into the output file to be resolved at run
4628 _bfd_elf_section_offset (output_bfd, info, input_section,
4630 if (outrel.r_offset == (bfd_vma) -1)
4632 else if (outrel.r_offset == (bfd_vma) -2)
4633 skip = TRUE, relocate = TRUE;
4635 outrel.r_offset += (input_section->output_section->vma
4636 + input_section->output_offset);
4639 memset (&outrel, 0, sizeof outrel);
4641 /* h->dynindx may be -1 if this symbol was marked to
4645 && (IS_X86_64_PCREL_TYPE (r_type)
4646 || ! bfd_link_pic (info)
4647 || ! SYMBOLIC_BIND (info, h)
4648 || ! h->def_regular))
4650 outrel.r_info = htab->r_info (h->dynindx, r_type);
4651 outrel.r_addend = rel->r_addend;
4655 /* This symbol is local, or marked to become local. */
4656 if (r_type == htab->pointer_r_type)
4659 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4660 outrel.r_addend = relocation + rel->r_addend;
4662 else if (r_type == R_X86_64_64
4663 && !ABI_64_P (output_bfd))
4666 outrel.r_info = htab->r_info (0,
4667 R_X86_64_RELATIVE64);
4668 outrel.r_addend = relocation + rel->r_addend;
4669 /* Check addend overflow. */
4670 if ((outrel.r_addend & 0x80000000)
4671 != (rel->r_addend & 0x80000000))
4674 int addend = rel->r_addend;
4675 if (h && h->root.root.string)
4676 name = h->root.root.string;
4678 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4681 (*_bfd_error_handler)
4682 (_("%B: addend -0x%x in relocation %s against "
4683 "symbol `%s' at 0x%lx in section `%A' is "
4685 input_bfd, input_section, addend,
4687 (unsigned long) rel->r_offset);
4689 (*_bfd_error_handler)
4690 (_("%B: addend 0x%x in relocation %s against "
4691 "symbol `%s' at 0x%lx in section `%A' is "
4693 input_bfd, input_section, addend,
4695 (unsigned long) rel->r_offset);
4696 bfd_set_error (bfd_error_bad_value);
4704 if (bfd_is_abs_section (sec))
4706 else if (sec == NULL || sec->owner == NULL)
4708 bfd_set_error (bfd_error_bad_value);
4715 /* We are turning this relocation into one
4716 against a section symbol. It would be
4717 proper to subtract the symbol's value,
4718 osec->vma, from the emitted reloc addend,
4719 but ld.so expects buggy relocs. */
4720 osec = sec->output_section;
4721 sindx = elf_section_data (osec)->dynindx;
4724 asection *oi = htab->elf.text_index_section;
4725 sindx = elf_section_data (oi)->dynindx;
4727 BFD_ASSERT (sindx != 0);
4730 outrel.r_info = htab->r_info (sindx, r_type);
4731 outrel.r_addend = relocation + rel->r_addend;
4735 sreloc = elf_section_data (input_section)->sreloc;
4737 if (sreloc == NULL || sreloc->contents == NULL)
4739 r = bfd_reloc_notsupported;
4740 goto check_relocation_error;
4743 elf_append_rela (output_bfd, sreloc, &outrel);
4745 /* If this reloc is against an external symbol, we do
4746 not want to fiddle with the addend. Otherwise, we
4747 need to include the symbol value so that it becomes
4748 an addend for the dynamic reloc. */
4755 case R_X86_64_TLSGD:
4756 case R_X86_64_GOTPC32_TLSDESC:
4757 case R_X86_64_TLSDESC_CALL:
4758 case R_X86_64_GOTTPOFF:
4759 tls_type = GOT_UNKNOWN;
4760 if (h == NULL && local_got_offsets)
4761 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
4763 tls_type = elf_x86_64_hash_entry (h)->tls_type;
4765 if (! elf_x86_64_tls_transition (info, input_bfd,
4766 input_section, contents,
4767 symtab_hdr, sym_hashes,
4768 &r_type, tls_type, rel,
4769 relend, h, r_symndx))
4772 if (r_type == R_X86_64_TPOFF32)
4774 bfd_vma roff = rel->r_offset;
4776 BFD_ASSERT (! unresolved_reloc);
4778 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
4780 /* GD->LE transition. For 64bit, change
4781 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4782 .word 0x6666; rex64; call __tls_get_addr
4785 leaq foo@tpoff(%rax), %rax
4787 leaq foo@tlsgd(%rip), %rdi
4788 .word 0x6666; rex64; call __tls_get_addr
4791 leaq foo@tpoff(%rax), %rax
4792 For largepic, change:
4793 leaq foo@tlsgd(%rip), %rdi
4794 movabsq $__tls_get_addr@pltoff, %rax
4799 leaq foo@tpoff(%rax), %rax
4800 nopw 0x0(%rax,%rax,1) */
4802 if (ABI_64_P (output_bfd)
4803 && contents[roff + 5] == (bfd_byte) '\xb8')
4805 memcpy (contents + roff - 3,
4806 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4807 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4810 else if (ABI_64_P (output_bfd))
4811 memcpy (contents + roff - 4,
4812 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4815 memcpy (contents + roff - 3,
4816 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4818 bfd_put_32 (output_bfd,
4819 elf_x86_64_tpoff (info, relocation),
4820 contents + roff + 8 + largepic);
4821 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4826 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
4828 /* GDesc -> LE transition.
4829 It's originally something like:
4830 leaq x@tlsdesc(%rip), %rax
4833 movl $x@tpoff, %rax. */
4835 unsigned int val, type;
4837 type = bfd_get_8 (input_bfd, contents + roff - 3);
4838 val = bfd_get_8 (input_bfd, contents + roff - 1);
4839 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
4840 contents + roff - 3);
4841 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
4842 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4843 contents + roff - 1);
4844 bfd_put_32 (output_bfd,
4845 elf_x86_64_tpoff (info, relocation),
4849 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
4851 /* GDesc -> LE transition.
4856 bfd_put_8 (output_bfd, 0x66, contents + roff);
4857 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4860 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
4862 /* IE->LE transition:
4863 For 64bit, originally it can be one of:
4864 movq foo@gottpoff(%rip), %reg
4865 addq foo@gottpoff(%rip), %reg
4868 leaq foo(%reg), %reg
4870 For 32bit, originally it can be one of:
4871 movq foo@gottpoff(%rip), %reg
4872 addl foo@gottpoff(%rip), %reg
4875 leal foo(%reg), %reg
4878 unsigned int val, type, reg;
4881 val = bfd_get_8 (input_bfd, contents + roff - 3);
4884 type = bfd_get_8 (input_bfd, contents + roff - 2);
4885 reg = bfd_get_8 (input_bfd, contents + roff - 1);
4891 bfd_put_8 (output_bfd, 0x49,
4892 contents + roff - 3);
4893 else if (!ABI_64_P (output_bfd) && val == 0x44)
4894 bfd_put_8 (output_bfd, 0x41,
4895 contents + roff - 3);
4896 bfd_put_8 (output_bfd, 0xc7,
4897 contents + roff - 2);
4898 bfd_put_8 (output_bfd, 0xc0 | reg,
4899 contents + roff - 1);
4903 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4906 bfd_put_8 (output_bfd, 0x49,
4907 contents + roff - 3);
4908 else if (!ABI_64_P (output_bfd) && val == 0x44)
4909 bfd_put_8 (output_bfd, 0x41,
4910 contents + roff - 3);
4911 bfd_put_8 (output_bfd, 0x81,
4912 contents + roff - 2);
4913 bfd_put_8 (output_bfd, 0xc0 | reg,
4914 contents + roff - 1);
4918 /* addq/addl -> leaq/leal */
4920 bfd_put_8 (output_bfd, 0x4d,
4921 contents + roff - 3);
4922 else if (!ABI_64_P (output_bfd) && val == 0x44)
4923 bfd_put_8 (output_bfd, 0x45,
4924 contents + roff - 3);
4925 bfd_put_8 (output_bfd, 0x8d,
4926 contents + roff - 2);
4927 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
4928 contents + roff - 1);
4930 bfd_put_32 (output_bfd,
4931 elf_x86_64_tpoff (info, relocation),
4939 if (htab->elf.sgot == NULL)
4944 off = h->got.offset;
4945 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
4949 if (local_got_offsets == NULL)
4952 off = local_got_offsets[r_symndx];
4953 offplt = local_tlsdesc_gotents[r_symndx];
4960 Elf_Internal_Rela outrel;
4964 if (htab->elf.srelgot == NULL)
4967 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4969 if (GOT_TLS_GDESC_P (tls_type))
4971 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
4972 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
4973 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
4974 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4975 + htab->elf.sgotplt->output_offset
4977 + htab->sgotplt_jump_table_size);
4978 sreloc = htab->elf.srelplt;
4980 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4982 outrel.r_addend = 0;
4983 elf_append_rela (output_bfd, sreloc, &outrel);
4986 sreloc = htab->elf.srelgot;
4988 outrel.r_offset = (htab->elf.sgot->output_section->vma
4989 + htab->elf.sgot->output_offset + off);
4991 if (GOT_TLS_GD_P (tls_type))
4992 dr_type = R_X86_64_DTPMOD64;
4993 else if (GOT_TLS_GDESC_P (tls_type))
4996 dr_type = R_X86_64_TPOFF64;
4998 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
4999 outrel.r_addend = 0;
5000 if ((dr_type == R_X86_64_TPOFF64
5001 || dr_type == R_X86_64_TLSDESC) && indx == 0)
5002 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
5003 outrel.r_info = htab->r_info (indx, dr_type);
5005 elf_append_rela (output_bfd, sreloc, &outrel);
5007 if (GOT_TLS_GD_P (tls_type))
5011 BFD_ASSERT (! unresolved_reloc);
5012 bfd_put_64 (output_bfd,
5013 relocation - elf_x86_64_dtpoff_base (info),
5014 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5018 bfd_put_64 (output_bfd, 0,
5019 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5020 outrel.r_info = htab->r_info (indx,
5022 outrel.r_offset += GOT_ENTRY_SIZE;
5023 elf_append_rela (output_bfd, sreloc,
5032 local_got_offsets[r_symndx] |= 1;
5035 if (off >= (bfd_vma) -2
5036 && ! GOT_TLS_GDESC_P (tls_type))
5038 if (r_type == ELF32_R_TYPE (rel->r_info))
5040 if (r_type == R_X86_64_GOTPC32_TLSDESC
5041 || r_type == R_X86_64_TLSDESC_CALL)
5042 relocation = htab->elf.sgotplt->output_section->vma
5043 + htab->elf.sgotplt->output_offset
5044 + offplt + htab->sgotplt_jump_table_size;
5046 relocation = htab->elf.sgot->output_section->vma
5047 + htab->elf.sgot->output_offset + off;
5048 unresolved_reloc = FALSE;
5052 bfd_vma roff = rel->r_offset;
5054 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
5056 /* GD->IE transition. For 64bit, change
5057 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
5058 .word 0x6666; rex64; call __tls_get_addr@plt
5061 addq foo@gottpoff(%rip), %rax
5063 leaq foo@tlsgd(%rip), %rdi
5064 .word 0x6666; rex64; call __tls_get_addr@plt
5067 addq foo@gottpoff(%rip), %rax
5068 For largepic, change:
5069 leaq foo@tlsgd(%rip), %rdi
5070 movabsq $__tls_get_addr@pltoff, %rax
5075 addq foo@gottpoff(%rax), %rax
5076 nopw 0x0(%rax,%rax,1) */
5078 if (ABI_64_P (output_bfd)
5079 && contents[roff + 5] == (bfd_byte) '\xb8')
5081 memcpy (contents + roff - 3,
5082 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
5083 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
5086 else if (ABI_64_P (output_bfd))
5087 memcpy (contents + roff - 4,
5088 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5091 memcpy (contents + roff - 3,
5092 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
5095 relocation = (htab->elf.sgot->output_section->vma
5096 + htab->elf.sgot->output_offset + off
5099 - input_section->output_section->vma
5100 - input_section->output_offset
5102 bfd_put_32 (output_bfd, relocation,
5103 contents + roff + 8 + largepic);
5104 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
5109 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
5111 /* GDesc -> IE transition.
5112 It's originally something like:
5113 leaq x@tlsdesc(%rip), %rax
5116 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
5118 /* Now modify the instruction as appropriate. To
5119 turn a leaq into a movq in the form we use it, it
5120 suffices to change the second byte from 0x8d to
5122 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
5124 bfd_put_32 (output_bfd,
5125 htab->elf.sgot->output_section->vma
5126 + htab->elf.sgot->output_offset + off
5128 - input_section->output_section->vma
5129 - input_section->output_offset
5134 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
5136 /* GDesc -> IE transition.
5143 bfd_put_8 (output_bfd, 0x66, contents + roff);
5144 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5152 case R_X86_64_TLSLD:
5153 if (! elf_x86_64_tls_transition (info, input_bfd,
5154 input_section, contents,
5155 symtab_hdr, sym_hashes,
5156 &r_type, GOT_UNKNOWN,
5157 rel, relend, h, r_symndx))
5160 if (r_type != R_X86_64_TLSLD)
5162 /* LD->LE transition:
5163 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
5164 For 64bit, we change it into:
5165 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
5166 For 32bit, we change it into:
5167 nopl 0x0(%rax); movl %fs:0, %eax.
5168 For largepic, change:
5169 leaq foo@tlsgd(%rip), %rdi
5170 movabsq $__tls_get_addr@pltoff, %rax
5174 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
5177 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
5178 if (ABI_64_P (output_bfd)
5179 && contents[rel->r_offset + 5] == (bfd_byte) '\xb8')
5180 memcpy (contents + rel->r_offset - 3,
5181 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
5182 "\x64\x48\x8b\x04\x25\0\0\0", 22);
5183 else if (ABI_64_P (output_bfd))
5184 memcpy (contents + rel->r_offset - 3,
5185 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
5187 memcpy (contents + rel->r_offset - 3,
5188 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
5189 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
5195 if (htab->elf.sgot == NULL)
5198 off = htab->tls_ld_got.offset;
5203 Elf_Internal_Rela outrel;
5205 if (htab->elf.srelgot == NULL)
5208 outrel.r_offset = (htab->elf.sgot->output_section->vma
5209 + htab->elf.sgot->output_offset + off);
5211 bfd_put_64 (output_bfd, 0,
5212 htab->elf.sgot->contents + off);
5213 bfd_put_64 (output_bfd, 0,
5214 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
5215 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
5216 outrel.r_addend = 0;
5217 elf_append_rela (output_bfd, htab->elf.srelgot,
5219 htab->tls_ld_got.offset |= 1;
5221 relocation = htab->elf.sgot->output_section->vma
5222 + htab->elf.sgot->output_offset + off;
5223 unresolved_reloc = FALSE;
5226 case R_X86_64_DTPOFF32:
5227 if (!bfd_link_executable (info)
5228 || (input_section->flags & SEC_CODE) == 0)
5229 relocation -= elf_x86_64_dtpoff_base (info);
5231 relocation = elf_x86_64_tpoff (info, relocation);
5234 case R_X86_64_TPOFF32:
5235 case R_X86_64_TPOFF64:
5236 BFD_ASSERT (bfd_link_executable (info));
5237 relocation = elf_x86_64_tpoff (info, relocation);
5240 case R_X86_64_DTPOFF64:
5241 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
5242 relocation -= elf_x86_64_dtpoff_base (info);
5249 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5250 because such sections are not SEC_ALLOC and thus ld.so will
5251 not process them. */
5252 if (unresolved_reloc
5253 && !((input_section->flags & SEC_DEBUGGING) != 0
5255 && _bfd_elf_section_offset (output_bfd, info, input_section,
5256 rel->r_offset) != (bfd_vma) -1)
5258 (*_bfd_error_handler)
5259 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5262 (long) rel->r_offset,
5264 h->root.root.string);
5269 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5270 contents, rel->r_offset,
5271 relocation, rel->r_addend);
5273 check_relocation_error:
5274 if (r != bfd_reloc_ok)
5279 name = h->root.root.string;
5282 name = bfd_elf_string_from_elf_section (input_bfd,
5283 symtab_hdr->sh_link,
5288 name = bfd_section_name (input_bfd, sec);
5291 if (r == bfd_reloc_overflow)
5293 if (! ((*info->callbacks->reloc_overflow)
5294 (info, (h ? &h->root : NULL), name, howto->name,
5295 (bfd_vma) 0, input_bfd, input_section,
5301 (*_bfd_error_handler)
5302 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5303 input_bfd, input_section,
5304 (long) rel->r_offset, name, (int) r);
5315 Elf_Internal_Shdr *rel_hdr;
5316 size_t deleted = rel - wrel;
5318 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5319 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5320 if (rel_hdr->sh_size == 0)
5322 /* It is too late to remove an empty reloc section. Leave
5324 ??? What is wrong with an empty section??? */
5325 rel_hdr->sh_size = rel_hdr->sh_entsize;
5328 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5329 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5330 input_section->reloc_count -= deleted;
5336 /* Finish up dynamic symbol handling. We set the contents of various
5337 dynamic sections here. */
5340 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
5341 struct bfd_link_info *info,
5342 struct elf_link_hash_entry *h,
5343 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
5345 struct elf_x86_64_link_hash_table *htab;
5346 const struct elf_x86_64_backend_data *abed;
5347 bfd_boolean use_plt_bnd;
5348 struct elf_x86_64_link_hash_entry *eh;
5350 htab = elf_x86_64_hash_table (info);
5354 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5355 section only if there is .plt section. */
5356 use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL;
5358 ? &elf_x86_64_bnd_arch_bed
5359 : get_elf_x86_64_backend_data (output_bfd));
5361 eh = (struct elf_x86_64_link_hash_entry *) h;
5363 if (h->plt.offset != (bfd_vma) -1)
5366 bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset;
5367 bfd_vma plt_plt_insn_end, plt_got_insn_size;
5368 Elf_Internal_Rela rela;
5370 asection *plt, *gotplt, *relplt, *resolved_plt;
5371 const struct elf_backend_data *bed;
5372 bfd_vma plt_got_pcrel_offset;
5374 /* When building a static executable, use .iplt, .igot.plt and
5375 .rela.iplt sections for STT_GNU_IFUNC symbols. */
5376 if (htab->elf.splt != NULL)
5378 plt = htab->elf.splt;
5379 gotplt = htab->elf.sgotplt;
5380 relplt = htab->elf.srelplt;
5384 plt = htab->elf.iplt;
5385 gotplt = htab->elf.igotplt;
5386 relplt = htab->elf.irelplt;
5389 /* This symbol has an entry in the procedure linkage table. Set
5391 if ((h->dynindx == -1
5392 && !((h->forced_local || bfd_link_executable (info))
5394 && h->type == STT_GNU_IFUNC))
5400 /* Get the index in the procedure linkage table which
5401 corresponds to this symbol. This is the index of this symbol
5402 in all the symbols for which we are making plt entries. The
5403 first entry in the procedure linkage table is reserved.
5405 Get the offset into the .got table of the entry that
5406 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5407 bytes. The first three are reserved for the dynamic linker.
5409 For static executables, we don't reserve anything. */
5411 if (plt == htab->elf.splt)
5413 got_offset = h->plt.offset / abed->plt_entry_size - 1;
5414 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
5418 got_offset = h->plt.offset / abed->plt_entry_size;
5419 got_offset = got_offset * GOT_ENTRY_SIZE;
5422 plt_plt_insn_end = abed->plt_plt_insn_end;
5423 plt_plt_offset = abed->plt_plt_offset;
5424 plt_got_insn_size = abed->plt_got_insn_size;
5425 plt_got_offset = abed->plt_got_offset;
5428 /* Use the second PLT with BND relocations. */
5429 const bfd_byte *plt_entry, *plt2_entry;
5431 if (eh->has_bnd_reloc)
5433 plt_entry = elf_x86_64_bnd_plt_entry;
5434 plt2_entry = elf_x86_64_bnd_plt2_entry;
5438 plt_entry = elf_x86_64_legacy_plt_entry;
5439 plt2_entry = elf_x86_64_legacy_plt2_entry;
5441 /* Subtract 1 since there is no BND prefix. */
5442 plt_plt_insn_end -= 1;
5443 plt_plt_offset -= 1;
5444 plt_got_insn_size -= 1;
5445 plt_got_offset -= 1;
5448 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry)
5449 == sizeof (elf_x86_64_legacy_plt_entry));
5451 /* Fill in the entry in the procedure linkage table. */
5452 memcpy (plt->contents + h->plt.offset,
5453 plt_entry, sizeof (elf_x86_64_legacy_plt_entry));
5454 /* Fill in the entry in the second PLT. */
5455 memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset,
5456 plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry));
5458 resolved_plt = htab->plt_bnd;
5459 plt_offset = eh->plt_bnd.offset;
5463 /* Fill in the entry in the procedure linkage table. */
5464 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
5465 abed->plt_entry_size);
5468 plt_offset = h->plt.offset;
5471 /* Insert the relocation positions of the plt section. */
5473 /* Put offset the PC-relative instruction referring to the GOT entry,
5474 subtracting the size of that instruction. */
5475 plt_got_pcrel_offset = (gotplt->output_section->vma
5476 + gotplt->output_offset
5478 - resolved_plt->output_section->vma
5479 - resolved_plt->output_offset
5481 - plt_got_insn_size);
5483 /* Check PC-relative offset overflow in PLT entry. */
5484 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
5485 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5486 output_bfd, h->root.root.string);
5488 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
5489 resolved_plt->contents + plt_offset + plt_got_offset);
5491 /* Fill in the entry in the global offset table, initially this
5492 points to the second part of the PLT entry. */
5493 bfd_put_64 (output_bfd, (plt->output_section->vma
5494 + plt->output_offset
5495 + h->plt.offset + abed->plt_lazy_offset),
5496 gotplt->contents + got_offset);
5498 /* Fill in the entry in the .rela.plt section. */
5499 rela.r_offset = (gotplt->output_section->vma
5500 + gotplt->output_offset
5502 if (h->dynindx == -1
5503 || ((bfd_link_executable (info)
5504 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5506 && h->type == STT_GNU_IFUNC))
5508 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5509 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5510 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
5511 rela.r_addend = (h->root.u.def.value
5512 + h->root.u.def.section->output_section->vma
5513 + h->root.u.def.section->output_offset);
5514 /* R_X86_64_IRELATIVE comes last. */
5515 plt_index = htab->next_irelative_index--;
5519 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
5521 plt_index = htab->next_jump_slot_index++;
5524 /* Don't fill PLT entry for static executables. */
5525 if (plt == htab->elf.splt)
5527 bfd_vma plt0_offset = h->plt.offset + plt_plt_insn_end;
5529 /* Put relocation index. */
5530 bfd_put_32 (output_bfd, plt_index,
5531 plt->contents + h->plt.offset + abed->plt_reloc_offset);
5533 /* Put offset for jmp .PLT0 and check for overflow. We don't
5534 check relocation index for overflow since branch displacement
5535 will overflow first. */
5536 if (plt0_offset > 0x80000000)
5537 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5538 output_bfd, h->root.root.string);
5539 bfd_put_32 (output_bfd, - plt0_offset,
5540 plt->contents + h->plt.offset + plt_plt_offset);
5543 bed = get_elf_backend_data (output_bfd);
5544 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
5545 bed->s->swap_reloca_out (output_bfd, &rela, loc);
5547 else if (eh->plt_got.offset != (bfd_vma) -1)
5549 bfd_vma got_offset, plt_offset, plt_got_offset, plt_got_insn_size;
5550 asection *plt, *got;
5551 bfd_boolean got_after_plt;
5552 int32_t got_pcrel_offset;
5553 const bfd_byte *got_plt_entry;
5555 /* Set the entry in the GOT procedure linkage table. */
5556 plt = htab->plt_got;
5557 got = htab->elf.sgot;
5558 got_offset = h->got.offset;
5560 if (got_offset == (bfd_vma) -1
5561 || h->type == STT_GNU_IFUNC
5566 /* Use the second PLT entry template for the GOT PLT since they
5567 are the identical. */
5568 plt_got_insn_size = elf_x86_64_bnd_arch_bed.plt_got_insn_size;
5569 plt_got_offset = elf_x86_64_bnd_arch_bed.plt_got_offset;
5570 if (eh->has_bnd_reloc)
5571 got_plt_entry = elf_x86_64_bnd_plt2_entry;
5574 got_plt_entry = elf_x86_64_legacy_plt2_entry;
5576 /* Subtract 1 since there is no BND prefix. */
5577 plt_got_insn_size -= 1;
5578 plt_got_offset -= 1;
5581 /* Fill in the entry in the GOT procedure linkage table. */
5582 plt_offset = eh->plt_got.offset;
5583 memcpy (plt->contents + plt_offset,
5584 got_plt_entry, sizeof (elf_x86_64_legacy_plt2_entry));
5586 /* Put offset the PC-relative instruction referring to the GOT
5587 entry, subtracting the size of that instruction. */
5588 got_pcrel_offset = (got->output_section->vma
5589 + got->output_offset
5591 - plt->output_section->vma
5592 - plt->output_offset
5594 - plt_got_insn_size);
5596 /* Check PC-relative offset overflow in GOT PLT entry. */
5597 got_after_plt = got->output_section->vma > plt->output_section->vma;
5598 if ((got_after_plt && got_pcrel_offset < 0)
5599 || (!got_after_plt && got_pcrel_offset > 0))
5600 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5601 output_bfd, h->root.root.string);
5603 bfd_put_32 (output_bfd, got_pcrel_offset,
5604 plt->contents + plt_offset + plt_got_offset);
5608 && (h->plt.offset != (bfd_vma) -1
5609 || eh->plt_got.offset != (bfd_vma) -1))
5611 /* Mark the symbol as undefined, rather than as defined in
5612 the .plt section. Leave the value if there were any
5613 relocations where pointer equality matters (this is a clue
5614 for the dynamic linker, to make function pointer
5615 comparisons work between an application and shared
5616 library), otherwise set it to zero. If a function is only
5617 called from a binary, there is no need to slow down
5618 shared libraries because of that. */
5619 sym->st_shndx = SHN_UNDEF;
5620 if (!h->pointer_equality_needed)
5624 if (h->got.offset != (bfd_vma) -1
5625 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
5626 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
5628 Elf_Internal_Rela rela;
5630 /* This symbol has an entry in the global offset table. Set it
5632 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
5635 rela.r_offset = (htab->elf.sgot->output_section->vma
5636 + htab->elf.sgot->output_offset
5637 + (h->got.offset &~ (bfd_vma) 1));
5639 /* If this is a static link, or it is a -Bsymbolic link and the
5640 symbol is defined locally or was forced to be local because
5641 of a version file, we just want to emit a RELATIVE reloc.
5642 The entry in the global offset table will already have been
5643 initialized in the relocate_section function. */
5645 && h->type == STT_GNU_IFUNC)
5647 if (bfd_link_pic (info))
5649 /* Generate R_X86_64_GLOB_DAT. */
5656 if (!h->pointer_equality_needed)
5659 /* For non-shared object, we can't use .got.plt, which
5660 contains the real function addres if we need pointer
5661 equality. We load the GOT entry with the PLT entry. */
5662 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
5663 bfd_put_64 (output_bfd, (plt->output_section->vma
5664 + plt->output_offset
5666 htab->elf.sgot->contents + h->got.offset);
5670 else if (bfd_link_pic (info)
5671 && SYMBOL_REFERENCES_LOCAL (info, h))
5673 if (!h->def_regular)
5675 BFD_ASSERT((h->got.offset & 1) != 0);
5676 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
5677 rela.r_addend = (h->root.u.def.value
5678 + h->root.u.def.section->output_section->vma
5679 + h->root.u.def.section->output_offset);
5683 BFD_ASSERT((h->got.offset & 1) == 0);
5685 bfd_put_64 (output_bfd, (bfd_vma) 0,
5686 htab->elf.sgot->contents + h->got.offset);
5687 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
5691 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
5696 Elf_Internal_Rela rela;
5698 /* This symbol needs a copy reloc. Set it up. */
5700 if (h->dynindx == -1
5701 || (h->root.type != bfd_link_hash_defined
5702 && h->root.type != bfd_link_hash_defweak)
5703 || htab->srelbss == NULL)
5706 rela.r_offset = (h->root.u.def.value
5707 + h->root.u.def.section->output_section->vma
5708 + h->root.u.def.section->output_offset);
5709 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
5711 elf_append_rela (output_bfd, htab->srelbss, &rela);
5717 /* Finish up local dynamic symbol handling. We set the contents of
5718 various dynamic sections here. */
5721 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
5723 struct elf_link_hash_entry *h
5724 = (struct elf_link_hash_entry *) *slot;
5725 struct bfd_link_info *info
5726 = (struct bfd_link_info *) inf;
5728 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
5732 /* Used to decide how to sort relocs in an optimal manner for the
5733 dynamic linker, before writing them out. */
5735 static enum elf_reloc_type_class
5736 elf_x86_64_reloc_type_class (const struct bfd_link_info *info,
5737 const asection *rel_sec ATTRIBUTE_UNUSED,
5738 const Elf_Internal_Rela *rela)
5740 bfd *abfd = info->output_bfd;
5741 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5742 struct elf_x86_64_link_hash_table *htab = elf_x86_64_hash_table (info);
5744 if (htab->elf.dynsym != NULL
5745 && htab->elf.dynsym->contents != NULL)
5747 /* Check relocation against STT_GNU_IFUNC symbol if there are
5749 unsigned long r_symndx = htab->r_sym (rela->r_info);
5750 Elf_Internal_Sym sym;
5751 if (!bed->s->swap_symbol_in (abfd,
5752 (htab->elf.dynsym->contents
5753 + r_symndx * bed->s->sizeof_sym),
5757 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5758 return reloc_class_ifunc;
5761 switch ((int) ELF32_R_TYPE (rela->r_info))
5763 case R_X86_64_RELATIVE:
5764 case R_X86_64_RELATIVE64:
5765 return reloc_class_relative;
5766 case R_X86_64_JUMP_SLOT:
5767 return reloc_class_plt;
5769 return reloc_class_copy;
5771 return reloc_class_normal;
5775 /* Finish up the dynamic sections. */
5778 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
5779 struct bfd_link_info *info)
5781 struct elf_x86_64_link_hash_table *htab;
5784 const struct elf_x86_64_backend_data *abed;
5786 htab = elf_x86_64_hash_table (info);
5790 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5791 section only if there is .plt section. */
5792 abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL
5793 ? &elf_x86_64_bnd_arch_bed
5794 : get_elf_x86_64_backend_data (output_bfd));
5796 dynobj = htab->elf.dynobj;
5797 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5799 if (htab->elf.dynamic_sections_created)
5801 bfd_byte *dyncon, *dynconend;
5802 const struct elf_backend_data *bed;
5803 bfd_size_type sizeof_dyn;
5805 if (sdyn == NULL || htab->elf.sgot == NULL)
5808 bed = get_elf_backend_data (dynobj);
5809 sizeof_dyn = bed->s->sizeof_dyn;
5810 dyncon = sdyn->contents;
5811 dynconend = sdyn->contents + sdyn->size;
5812 for (; dyncon < dynconend; dyncon += sizeof_dyn)
5814 Elf_Internal_Dyn dyn;
5817 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
5825 s = htab->elf.sgotplt;
5826 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5830 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
5834 s = htab->elf.srelplt->output_section;
5835 dyn.d_un.d_val = s->size;
5839 /* The procedure linkage table relocs (DT_JMPREL) should
5840 not be included in the overall relocs (DT_RELA).
5841 Therefore, we override the DT_RELASZ entry here to
5842 make it not include the JMPREL relocs. Since the
5843 linker script arranges for .rela.plt to follow all
5844 other relocation sections, we don't have to worry
5845 about changing the DT_RELA entry. */
5846 if (htab->elf.srelplt != NULL)
5848 s = htab->elf.srelplt->output_section;
5849 dyn.d_un.d_val -= s->size;
5853 case DT_TLSDESC_PLT:
5855 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5856 + htab->tlsdesc_plt;
5859 case DT_TLSDESC_GOT:
5861 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5862 + htab->tlsdesc_got;
5866 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
5869 /* Fill in the special first entry in the procedure linkage table. */
5870 if (htab->elf.splt && htab->elf.splt->size > 0)
5872 /* Fill in the first entry in the procedure linkage table. */
5873 memcpy (htab->elf.splt->contents,
5874 abed->plt0_entry, abed->plt_entry_size);
5875 /* Add offset for pushq GOT+8(%rip), since the instruction
5876 uses 6 bytes subtract this value. */
5877 bfd_put_32 (output_bfd,
5878 (htab->elf.sgotplt->output_section->vma
5879 + htab->elf.sgotplt->output_offset
5881 - htab->elf.splt->output_section->vma
5882 - htab->elf.splt->output_offset
5884 htab->elf.splt->contents + abed->plt0_got1_offset);
5885 /* Add offset for the PC-relative instruction accessing GOT+16,
5886 subtracting the offset to the end of that instruction. */
5887 bfd_put_32 (output_bfd,
5888 (htab->elf.sgotplt->output_section->vma
5889 + htab->elf.sgotplt->output_offset
5891 - htab->elf.splt->output_section->vma
5892 - htab->elf.splt->output_offset
5893 - abed->plt0_got2_insn_end),
5894 htab->elf.splt->contents + abed->plt0_got2_offset);
5896 elf_section_data (htab->elf.splt->output_section)
5897 ->this_hdr.sh_entsize = abed->plt_entry_size;
5899 if (htab->tlsdesc_plt)
5901 bfd_put_64 (output_bfd, (bfd_vma) 0,
5902 htab->elf.sgot->contents + htab->tlsdesc_got);
5904 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
5905 abed->plt0_entry, abed->plt_entry_size);
5907 /* Add offset for pushq GOT+8(%rip), since the
5908 instruction uses 6 bytes subtract this value. */
5909 bfd_put_32 (output_bfd,
5910 (htab->elf.sgotplt->output_section->vma
5911 + htab->elf.sgotplt->output_offset
5913 - htab->elf.splt->output_section->vma
5914 - htab->elf.splt->output_offset
5917 htab->elf.splt->contents
5918 + htab->tlsdesc_plt + abed->plt0_got1_offset);
5919 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5920 where TGD stands for htab->tlsdesc_got, subtracting the offset
5921 to the end of that instruction. */
5922 bfd_put_32 (output_bfd,
5923 (htab->elf.sgot->output_section->vma
5924 + htab->elf.sgot->output_offset
5926 - htab->elf.splt->output_section->vma
5927 - htab->elf.splt->output_offset
5929 - abed->plt0_got2_insn_end),
5930 htab->elf.splt->contents
5931 + htab->tlsdesc_plt + abed->plt0_got2_offset);
5936 if (htab->plt_bnd != NULL)
5937 elf_section_data (htab->plt_bnd->output_section)
5938 ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry);
5940 if (htab->elf.sgotplt)
5942 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5944 (*_bfd_error_handler)
5945 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5949 /* Fill in the first three entries in the global offset table. */
5950 if (htab->elf.sgotplt->size > 0)
5952 /* Set the first entry in the global offset table to the address of
5953 the dynamic section. */
5955 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
5957 bfd_put_64 (output_bfd,
5958 sdyn->output_section->vma + sdyn->output_offset,
5959 htab->elf.sgotplt->contents);
5960 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5961 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
5962 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
5965 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
5969 /* Adjust .eh_frame for .plt section. */
5970 if (htab->plt_eh_frame != NULL
5971 && htab->plt_eh_frame->contents != NULL)
5973 if (htab->elf.splt != NULL
5974 && htab->elf.splt->size != 0
5975 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5976 && htab->elf.splt->output_section != NULL
5977 && htab->plt_eh_frame->output_section != NULL)
5979 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5980 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5981 + htab->plt_eh_frame->output_offset
5982 + PLT_FDE_START_OFFSET;
5983 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5984 htab->plt_eh_frame->contents
5985 + PLT_FDE_START_OFFSET);
5987 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5989 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5991 htab->plt_eh_frame->contents))
5996 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5997 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
6000 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6001 htab_traverse (htab->loc_hash_table,
6002 elf_x86_64_finish_local_dynamic_symbol,
6008 /* Return an array of PLT entry symbol values. */
6011 elf_x86_64_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
6014 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6017 bfd_vma *plt_sym_val;
6019 bfd_byte *plt_contents;
6020 const struct elf_x86_64_backend_data *bed;
6021 Elf_Internal_Shdr *hdr;
6024 /* Get the .plt section contents. PLT passed down may point to the
6025 .plt.bnd section. Make sure that PLT always points to the .plt
6027 plt_bnd = bfd_get_section_by_name (abfd, ".plt.bnd");
6032 plt = bfd_get_section_by_name (abfd, ".plt");
6035 bed = &elf_x86_64_bnd_arch_bed;
6038 bed = get_elf_x86_64_backend_data (abfd);
6040 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
6041 if (plt_contents == NULL)
6043 if (!bfd_get_section_contents (abfd, (asection *) plt,
6044 plt_contents, 0, plt->size))
6047 free (plt_contents);
6051 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6052 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
6055 hdr = &elf_section_data (relplt)->this_hdr;
6056 count = relplt->size / hdr->sh_entsize;
6058 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
6059 if (plt_sym_val == NULL)
6062 for (i = 0; i < count; i++)
6063 plt_sym_val[i] = -1;
6065 plt_offset = bed->plt_entry_size;
6066 p = relplt->relocation;
6067 for (i = 0; i < count; i++, p++)
6071 /* Skip unknown relocation. */
6072 if (p->howto == NULL)
6075 if (p->howto->type != R_X86_64_JUMP_SLOT
6076 && p->howto->type != R_X86_64_IRELATIVE)
6079 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
6080 + bed->plt_reloc_offset));
6081 if (reloc_index < count)
6085 /* This is the index in .plt section. */
6086 long plt_index = plt_offset / bed->plt_entry_size;
6087 /* Store VMA + the offset in .plt.bnd section. */
6088 plt_sym_val[reloc_index] =
6090 + (plt_index - 1) * sizeof (elf_x86_64_legacy_plt2_entry));
6093 plt_sym_val[reloc_index] = plt->vma + plt_offset;
6095 plt_offset += bed->plt_entry_size;
6097 /* PR binutils/18437: Skip extra relocations in the .rela.plt
6099 if (plt_offset >= plt->size)
6103 free (plt_contents);
6108 /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
6112 elf_x86_64_get_synthetic_symtab (bfd *abfd,
6119 /* Pass the .plt.bnd section to _bfd_elf_ifunc_get_synthetic_symtab
6120 as PLT if it exists. */
6121 asection *plt = bfd_get_section_by_name (abfd, ".plt.bnd");
6123 plt = bfd_get_section_by_name (abfd, ".plt");
6124 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
6125 dynsymcount, dynsyms, ret,
6127 elf_x86_64_get_plt_sym_val);
6130 /* Handle an x86-64 specific section when reading an object file. This
6131 is called when elfcode.h finds a section with an unknown type. */
6134 elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
6135 const char *name, int shindex)
6137 if (hdr->sh_type != SHT_X86_64_UNWIND)
6140 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6146 /* Hook called by the linker routine which adds symbols from an object
6147 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
6151 elf_x86_64_add_symbol_hook (bfd *abfd,
6152 struct bfd_link_info *info,
6153 Elf_Internal_Sym *sym,
6154 const char **namep ATTRIBUTE_UNUSED,
6155 flagword *flagsp ATTRIBUTE_UNUSED,
6161 switch (sym->st_shndx)
6163 case SHN_X86_64_LCOMMON:
6164 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
6167 lcomm = bfd_make_section_with_flags (abfd,
6171 | SEC_LINKER_CREATED));
6174 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
6177 *valp = sym->st_size;
6181 if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE
6182 && (abfd->flags & DYNAMIC) == 0
6183 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
6184 elf_tdata (info->output_bfd)->has_gnu_symbols
6185 |= elf_gnu_symbol_unique;
6191 /* Given a BFD section, try to locate the corresponding ELF section
6195 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
6196 asection *sec, int *index_return)
6198 if (sec == &_bfd_elf_large_com_section)
6200 *index_return = SHN_X86_64_LCOMMON;
6206 /* Process a symbol. */
6209 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
6212 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
6214 switch (elfsym->internal_elf_sym.st_shndx)
6216 case SHN_X86_64_LCOMMON:
6217 asym->section = &_bfd_elf_large_com_section;
6218 asym->value = elfsym->internal_elf_sym.st_size;
6219 /* Common symbol doesn't set BSF_GLOBAL. */
6220 asym->flags &= ~BSF_GLOBAL;
6226 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
6228 return (sym->st_shndx == SHN_COMMON
6229 || sym->st_shndx == SHN_X86_64_LCOMMON);
6233 elf_x86_64_common_section_index (asection *sec)
6235 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
6238 return SHN_X86_64_LCOMMON;
6242 elf_x86_64_common_section (asection *sec)
6244 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
6245 return bfd_com_section_ptr;
6247 return &_bfd_elf_large_com_section;
6251 elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
6252 const Elf_Internal_Sym *sym,
6257 const asection *oldsec)
6259 /* A normal common symbol and a large common symbol result in a
6260 normal common symbol. We turn the large common symbol into a
6263 && h->root.type == bfd_link_hash_common
6265 && bfd_is_com_section (*psec)
6268 if (sym->st_shndx == SHN_COMMON
6269 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
6271 h->root.u.c.p->section
6272 = bfd_make_section_old_way (oldbfd, "COMMON");
6273 h->root.u.c.p->section->flags = SEC_ALLOC;
6275 else if (sym->st_shndx == SHN_X86_64_LCOMMON
6276 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
6277 *psec = bfd_com_section_ptr;
6284 elf_x86_64_additional_program_headers (bfd *abfd,
6285 struct bfd_link_info *info ATTRIBUTE_UNUSED)
6290 /* Check to see if we need a large readonly segment. */
6291 s = bfd_get_section_by_name (abfd, ".lrodata");
6292 if (s && (s->flags & SEC_LOAD))
6295 /* Check to see if we need a large data segment. Since .lbss sections
6296 is placed right after the .bss section, there should be no need for
6297 a large data segment just because of .lbss. */
6298 s = bfd_get_section_by_name (abfd, ".ldata");
6299 if (s && (s->flags & SEC_LOAD))
6305 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6308 elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
6310 if (h->plt.offset != (bfd_vma) -1
6312 && !h->pointer_equality_needed)
6315 return _bfd_elf_hash_symbol (h);
6318 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
6321 elf_x86_64_relocs_compatible (const bfd_target *input,
6322 const bfd_target *output)
6324 return ((xvec_get_elf_backend_data (input)->s->elfclass
6325 == xvec_get_elf_backend_data (output)->s->elfclass)
6326 && _bfd_elf_relocs_compatible (input, output));
6329 static const struct bfd_elf_special_section
6330 elf_x86_64_special_sections[]=
6332 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6333 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6334 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
6335 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6336 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6337 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6338 { NULL, 0, 0, 0, 0 }
6341 #define TARGET_LITTLE_SYM x86_64_elf64_vec
6342 #define TARGET_LITTLE_NAME "elf64-x86-64"
6343 #define ELF_ARCH bfd_arch_i386
6344 #define ELF_TARGET_ID X86_64_ELF_DATA
6345 #define ELF_MACHINE_CODE EM_X86_64
6346 #define ELF_MAXPAGESIZE 0x200000
6347 #define ELF_MINPAGESIZE 0x1000
6348 #define ELF_COMMONPAGESIZE 0x1000
6350 #define elf_backend_can_gc_sections 1
6351 #define elf_backend_can_refcount 1
6352 #define elf_backend_want_got_plt 1
6353 #define elf_backend_plt_readonly 1
6354 #define elf_backend_want_plt_sym 0
6355 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
6356 #define elf_backend_rela_normal 1
6357 #define elf_backend_plt_alignment 4
6358 #define elf_backend_extern_protected_data 1
6360 #define elf_info_to_howto elf_x86_64_info_to_howto
6362 #define bfd_elf64_bfd_link_hash_table_create \
6363 elf_x86_64_link_hash_table_create
6364 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
6365 #define bfd_elf64_bfd_reloc_name_lookup \
6366 elf_x86_64_reloc_name_lookup
6368 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
6369 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
6370 #define elf_backend_check_relocs elf_x86_64_check_relocs
6371 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
6372 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
6373 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
6374 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
6375 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
6376 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
6377 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
6378 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
6380 #define elf_backend_write_core_note elf_x86_64_write_core_note
6382 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
6383 #define elf_backend_relocate_section elf_x86_64_relocate_section
6384 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
6385 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
6386 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
6387 #define elf_backend_object_p elf64_x86_64_elf_object_p
6388 #define bfd_elf64_mkobject elf_x86_64_mkobject
6389 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
6391 #define elf_backend_section_from_shdr \
6392 elf_x86_64_section_from_shdr
6394 #define elf_backend_section_from_bfd_section \
6395 elf_x86_64_elf_section_from_bfd_section
6396 #define elf_backend_add_symbol_hook \
6397 elf_x86_64_add_symbol_hook
6398 #define elf_backend_symbol_processing \
6399 elf_x86_64_symbol_processing
6400 #define elf_backend_common_section_index \
6401 elf_x86_64_common_section_index
6402 #define elf_backend_common_section \
6403 elf_x86_64_common_section
6404 #define elf_backend_common_definition \
6405 elf_x86_64_common_definition
6406 #define elf_backend_merge_symbol \
6407 elf_x86_64_merge_symbol
6408 #define elf_backend_special_sections \
6409 elf_x86_64_special_sections
6410 #define elf_backend_additional_program_headers \
6411 elf_x86_64_additional_program_headers
6412 #define elf_backend_hash_symbol \
6413 elf_x86_64_hash_symbol
6414 #define elf_backend_omit_section_dynsym \
6415 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
6417 #include "elf64-target.h"
6419 /* CloudABI support. */
6421 #undef TARGET_LITTLE_SYM
6422 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
6423 #undef TARGET_LITTLE_NAME
6424 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
6427 #define ELF_OSABI ELFOSABI_CLOUDABI
6430 #define elf64_bed elf64_x86_64_cloudabi_bed
6432 #include "elf64-target.h"
6434 /* FreeBSD support. */
6436 #undef TARGET_LITTLE_SYM
6437 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
6438 #undef TARGET_LITTLE_NAME
6439 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
6442 #define ELF_OSABI ELFOSABI_FREEBSD
6445 #define elf64_bed elf64_x86_64_fbsd_bed
6447 #include "elf64-target.h"
6449 /* Solaris 2 support. */
6451 #undef TARGET_LITTLE_SYM
6452 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
6453 #undef TARGET_LITTLE_NAME
6454 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
6456 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6457 objects won't be recognized. */
6461 #define elf64_bed elf64_x86_64_sol2_bed
6463 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6465 #undef elf_backend_static_tls_alignment
6466 #define elf_backend_static_tls_alignment 16
6468 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6470 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6472 #undef elf_backend_want_plt_sym
6473 #define elf_backend_want_plt_sym 1
6475 #include "elf64-target.h"
6477 /* Native Client support. */
6480 elf64_x86_64_nacl_elf_object_p (bfd *abfd)
6482 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6483 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
6487 #undef TARGET_LITTLE_SYM
6488 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
6489 #undef TARGET_LITTLE_NAME
6490 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6492 #define elf64_bed elf64_x86_64_nacl_bed
6494 #undef ELF_MAXPAGESIZE
6495 #undef ELF_MINPAGESIZE
6496 #undef ELF_COMMONPAGESIZE
6497 #define ELF_MAXPAGESIZE 0x10000
6498 #define ELF_MINPAGESIZE 0x10000
6499 #define ELF_COMMONPAGESIZE 0x10000
6501 /* Restore defaults. */
6503 #undef elf_backend_static_tls_alignment
6504 #undef elf_backend_want_plt_sym
6505 #define elf_backend_want_plt_sym 0
6507 /* NaCl uses substantially different PLT entries for the same effects. */
6509 #undef elf_backend_plt_alignment
6510 #define elf_backend_plt_alignment 5
6511 #define NACL_PLT_ENTRY_SIZE 64
6512 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6514 static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
6516 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6517 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6518 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6519 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6520 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6522 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
6523 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
6525 /* 32 bytes of nop to pad out to the standard size. */
6526 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6527 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6528 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6529 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6530 0x66, /* excess data32 prefix */
6534 static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6536 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6537 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6538 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6539 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6541 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6542 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6543 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6545 /* Lazy GOT entries point here (32-byte aligned). */
6546 0x68, /* pushq immediate */
6547 0, 0, 0, 0, /* replaced with index into relocation table. */
6548 0xe9, /* jmp relative */
6549 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6551 /* 22 bytes of nop to pad out to the standard size. */
6552 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
6553 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6554 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6557 /* .eh_frame covering the .plt section. */
6559 static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
6561 #if (PLT_CIE_LENGTH != 20 \
6562 || PLT_FDE_LENGTH != 36 \
6563 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6564 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6565 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6567 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6568 0, 0, 0, 0, /* CIE ID */
6569 1, /* CIE version */
6570 'z', 'R', 0, /* Augmentation string */
6571 1, /* Code alignment factor */
6572 0x78, /* Data alignment factor */
6573 16, /* Return address column */
6574 1, /* Augmentation size */
6575 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6576 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6577 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6578 DW_CFA_nop, DW_CFA_nop,
6580 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6581 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
6582 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6583 0, 0, 0, 0, /* .plt size goes here */
6584 0, /* Augmentation size */
6585 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
6586 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6587 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
6588 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6589 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6590 13, /* Block length */
6591 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
6592 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
6593 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6594 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
6595 DW_CFA_nop, DW_CFA_nop
6598 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
6600 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
6601 elf_x86_64_nacl_plt_entry, /* plt_entry */
6602 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6603 2, /* plt0_got1_offset */
6604 9, /* plt0_got2_offset */
6605 13, /* plt0_got2_insn_end */
6606 3, /* plt_got_offset */
6607 33, /* plt_reloc_offset */
6608 38, /* plt_plt_offset */
6609 7, /* plt_got_insn_size */
6610 42, /* plt_plt_insn_end */
6611 32, /* plt_lazy_offset */
6612 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
6613 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
6616 #undef elf_backend_arch_data
6617 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6619 #undef elf_backend_object_p
6620 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
6621 #undef elf_backend_modify_segment_map
6622 #define elf_backend_modify_segment_map nacl_modify_segment_map
6623 #undef elf_backend_modify_program_headers
6624 #define elf_backend_modify_program_headers nacl_modify_program_headers
6625 #undef elf_backend_final_write_processing
6626 #define elf_backend_final_write_processing nacl_final_write_processing
6628 #include "elf64-target.h"
6630 /* Native Client x32 support. */
6633 elf32_x86_64_nacl_elf_object_p (bfd *abfd)
6635 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6636 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
6640 #undef TARGET_LITTLE_SYM
6641 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
6642 #undef TARGET_LITTLE_NAME
6643 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6645 #define elf32_bed elf32_x86_64_nacl_bed
6647 #define bfd_elf32_bfd_link_hash_table_create \
6648 elf_x86_64_link_hash_table_create
6649 #define bfd_elf32_bfd_reloc_type_lookup \
6650 elf_x86_64_reloc_type_lookup
6651 #define bfd_elf32_bfd_reloc_name_lookup \
6652 elf_x86_64_reloc_name_lookup
6653 #define bfd_elf32_mkobject \
6655 #define bfd_elf32_get_synthetic_symtab \
6656 elf_x86_64_get_synthetic_symtab
6658 #undef elf_backend_object_p
6659 #define elf_backend_object_p \
6660 elf32_x86_64_nacl_elf_object_p
6662 #undef elf_backend_bfd_from_remote_memory
6663 #define elf_backend_bfd_from_remote_memory \
6664 _bfd_elf32_bfd_from_remote_memory
6666 #undef elf_backend_size_info
6667 #define elf_backend_size_info \
6668 _bfd_elf32_size_info
6670 #include "elf32-target.h"
6672 /* Restore defaults. */
6673 #undef elf_backend_object_p
6674 #define elf_backend_object_p elf64_x86_64_elf_object_p
6675 #undef elf_backend_bfd_from_remote_memory
6676 #undef elf_backend_size_info
6677 #undef elf_backend_modify_segment_map
6678 #undef elf_backend_modify_program_headers
6679 #undef elf_backend_final_write_processing
6681 /* Intel L1OM support. */
6684 elf64_l1om_elf_object_p (bfd *abfd)
6686 /* Set the right machine number for an L1OM elf64 file. */
6687 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
6691 #undef TARGET_LITTLE_SYM
6692 #define TARGET_LITTLE_SYM l1om_elf64_vec
6693 #undef TARGET_LITTLE_NAME
6694 #define TARGET_LITTLE_NAME "elf64-l1om"
6696 #define ELF_ARCH bfd_arch_l1om
6698 #undef ELF_MACHINE_CODE
6699 #define ELF_MACHINE_CODE EM_L1OM
6704 #define elf64_bed elf64_l1om_bed
6706 #undef elf_backend_object_p
6707 #define elf_backend_object_p elf64_l1om_elf_object_p
6709 /* Restore defaults. */
6710 #undef ELF_MAXPAGESIZE
6711 #undef ELF_MINPAGESIZE
6712 #undef ELF_COMMONPAGESIZE
6713 #define ELF_MAXPAGESIZE 0x200000
6714 #define ELF_MINPAGESIZE 0x1000
6715 #define ELF_COMMONPAGESIZE 0x1000
6716 #undef elf_backend_plt_alignment
6717 #define elf_backend_plt_alignment 4
6718 #undef elf_backend_arch_data
6719 #define elf_backend_arch_data &elf_x86_64_arch_bed
6721 #include "elf64-target.h"
6723 /* FreeBSD L1OM support. */
6725 #undef TARGET_LITTLE_SYM
6726 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
6727 #undef TARGET_LITTLE_NAME
6728 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6731 #define ELF_OSABI ELFOSABI_FREEBSD
6734 #define elf64_bed elf64_l1om_fbsd_bed
6736 #include "elf64-target.h"
6738 /* Intel K1OM support. */
6741 elf64_k1om_elf_object_p (bfd *abfd)
6743 /* Set the right machine number for an K1OM elf64 file. */
6744 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
6748 #undef TARGET_LITTLE_SYM
6749 #define TARGET_LITTLE_SYM k1om_elf64_vec
6750 #undef TARGET_LITTLE_NAME
6751 #define TARGET_LITTLE_NAME "elf64-k1om"
6753 #define ELF_ARCH bfd_arch_k1om
6755 #undef ELF_MACHINE_CODE
6756 #define ELF_MACHINE_CODE EM_K1OM
6761 #define elf64_bed elf64_k1om_bed
6763 #undef elf_backend_object_p
6764 #define elf_backend_object_p elf64_k1om_elf_object_p
6766 #undef elf_backend_static_tls_alignment
6768 #undef elf_backend_want_plt_sym
6769 #define elf_backend_want_plt_sym 0
6771 #include "elf64-target.h"
6773 /* FreeBSD K1OM support. */
6775 #undef TARGET_LITTLE_SYM
6776 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6777 #undef TARGET_LITTLE_NAME
6778 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6781 #define ELF_OSABI ELFOSABI_FREEBSD
6784 #define elf64_bed elf64_k1om_fbsd_bed
6786 #include "elf64-target.h"
6788 /* 32bit x86-64 support. */
6790 #undef TARGET_LITTLE_SYM
6791 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6792 #undef TARGET_LITTLE_NAME
6793 #define TARGET_LITTLE_NAME "elf32-x86-64"
6797 #define ELF_ARCH bfd_arch_i386
6799 #undef ELF_MACHINE_CODE
6800 #define ELF_MACHINE_CODE EM_X86_64
6804 #undef elf_backend_object_p
6805 #define elf_backend_object_p \
6806 elf32_x86_64_elf_object_p
6808 #undef elf_backend_bfd_from_remote_memory
6809 #define elf_backend_bfd_from_remote_memory \
6810 _bfd_elf32_bfd_from_remote_memory
6812 #undef elf_backend_size_info
6813 #define elf_backend_size_info \
6814 _bfd_elf32_size_info
6816 #include "elf32-target.h"