1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2014 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 #include "bfd_stdint.h"
32 #include "libiberty.h"
34 #include "elf/x86-64.h"
41 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
42 #define MINUS_ONE (~ (bfd_vma) 0)
44 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
45 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
46 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
47 since they are the same. */
49 #define ABI_64_P(abfd) \
50 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
52 /* The relocation "howto" table. Order of fields:
53 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
54 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
55 static reloc_howto_type x86_64_elf_howto_table[] =
57 HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
60 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
63 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
64 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
66 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
67 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
69 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
70 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
72 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
75 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
78 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
81 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
84 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
85 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
87 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
88 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
90 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
91 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
93 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
95 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
97 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
99 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
100 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
101 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
104 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
107 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
110 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
111 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
113 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
114 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
116 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
117 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
119 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
120 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
122 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
123 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
125 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
128 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
130 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
131 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
132 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
133 FALSE, 0xffffffff, 0xffffffff, TRUE),
134 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
135 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
137 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
138 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
140 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
141 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
142 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
143 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
144 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
146 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
147 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
149 HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
150 bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff,
152 HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned,
153 bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE,
155 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
156 complain_overflow_bitfield, bfd_elf_generic_reloc,
157 "R_X86_64_GOTPC32_TLSDESC",
158 FALSE, 0xffffffff, 0xffffffff, TRUE),
159 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
160 complain_overflow_dont, bfd_elf_generic_reloc,
161 "R_X86_64_TLSDESC_CALL",
163 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
164 complain_overflow_bitfield, bfd_elf_generic_reloc,
166 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
167 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
170 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
173 HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
174 bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff,
176 HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
177 bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff,
180 /* We have a gap in the reloc numbers here.
181 R_X86_64_standard counts the number up to this point, and
182 R_X86_64_vt_offset is the value to subtract from a reloc type of
183 R_X86_64_GNU_VT* to form an index into this table. */
184 #define R_X86_64_standard (R_X86_64_PLT32_BND + 1)
185 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
187 /* GNU extension to record C++ vtable hierarchy. */
188 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
189 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
191 /* GNU extension to record C++ vtable member usage. */
192 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
193 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
196 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
197 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
198 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
202 #define IS_X86_64_PCREL_TYPE(TYPE) \
203 ( ((TYPE) == R_X86_64_PC8) \
204 || ((TYPE) == R_X86_64_PC16) \
205 || ((TYPE) == R_X86_64_PC32) \
206 || ((TYPE) == R_X86_64_PC32_BND) \
207 || ((TYPE) == R_X86_64_PC64))
209 /* Map BFD relocs to the x86_64 elf relocs. */
212 bfd_reloc_code_real_type bfd_reloc_val;
213 unsigned char elf_reloc_val;
216 static const struct elf_reloc_map x86_64_reloc_map[] =
218 { BFD_RELOC_NONE, R_X86_64_NONE, },
219 { BFD_RELOC_64, R_X86_64_64, },
220 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
221 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
222 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
223 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
224 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
225 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
226 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
227 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
228 { BFD_RELOC_32, R_X86_64_32, },
229 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
230 { BFD_RELOC_16, R_X86_64_16, },
231 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
232 { BFD_RELOC_8, R_X86_64_8, },
233 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
234 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
235 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
236 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
237 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
238 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
239 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
240 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
241 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
242 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
243 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
244 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
245 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
246 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
247 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
248 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
249 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
250 { BFD_RELOC_SIZE32, R_X86_64_SIZE32, },
251 { BFD_RELOC_SIZE64, R_X86_64_SIZE64, },
252 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
253 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
254 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
255 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
256 { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND,},
257 { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND,},
258 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
259 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
262 static reloc_howto_type *
263 elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
267 if (r_type == (unsigned int) R_X86_64_32)
272 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
274 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
275 || r_type >= (unsigned int) R_X86_64_max)
277 if (r_type >= (unsigned int) R_X86_64_standard)
279 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
281 r_type = R_X86_64_NONE;
286 i = r_type - (unsigned int) R_X86_64_vt_offset;
287 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
288 return &x86_64_elf_howto_table[i];
291 /* Given a BFD reloc type, return a HOWTO structure. */
292 static reloc_howto_type *
293 elf_x86_64_reloc_type_lookup (bfd *abfd,
294 bfd_reloc_code_real_type code)
298 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
301 if (x86_64_reloc_map[i].bfd_reloc_val == code)
302 return elf_x86_64_rtype_to_howto (abfd,
303 x86_64_reloc_map[i].elf_reloc_val);
308 static reloc_howto_type *
309 elf_x86_64_reloc_name_lookup (bfd *abfd,
314 if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
316 /* Get x32 R_X86_64_32. */
317 reloc_howto_type *reloc
318 = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
319 BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
323 for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
324 if (x86_64_elf_howto_table[i].name != NULL
325 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
326 return &x86_64_elf_howto_table[i];
331 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
334 elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
335 Elf_Internal_Rela *dst)
339 r_type = ELF32_R_TYPE (dst->r_info);
340 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
341 BFD_ASSERT (r_type == cache_ptr->howto->type);
344 /* Support for core dump NOTE sections. */
346 elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
351 switch (note->descsz)
356 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
358 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
361 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
369 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
371 elf_tdata (abfd)->core->signal
372 = bfd_get_16 (abfd, note->descdata + 12);
375 elf_tdata (abfd)->core->lwpid
376 = bfd_get_32 (abfd, note->descdata + 32);
385 /* Make a ".reg/999" section. */
386 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
387 size, note->descpos + offset);
391 elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
393 switch (note->descsz)
398 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
399 elf_tdata (abfd)->core->pid
400 = bfd_get_32 (abfd, note->descdata + 12);
401 elf_tdata (abfd)->core->program
402 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
403 elf_tdata (abfd)->core->command
404 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
407 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
408 elf_tdata (abfd)->core->pid
409 = bfd_get_32 (abfd, note->descdata + 24);
410 elf_tdata (abfd)->core->program
411 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
412 elf_tdata (abfd)->core->command
413 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
416 /* Note that for some reason, a spurious space is tacked
417 onto the end of the args in some (at least one anyway)
418 implementations, so strip it off if it exists. */
421 char *command = elf_tdata (abfd)->core->command;
422 int n = strlen (command);
424 if (0 < n && command[n - 1] == ' ')
425 command[n - 1] = '\0';
433 elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
436 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
438 const char *fname, *psargs;
449 va_start (ap, note_type);
450 fname = va_arg (ap, const char *);
451 psargs = va_arg (ap, const char *);
454 if (bed->s->elfclass == ELFCLASS32)
457 memset (&data, 0, sizeof (data));
458 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
459 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
460 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
461 &data, sizeof (data));
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 va_start (ap, note_type);
476 pid = va_arg (ap, long);
477 cursig = va_arg (ap, int);
478 gregs = va_arg (ap, const void *);
481 if (bed->s->elfclass == ELFCLASS32)
483 if (bed->elf_machine_code == EM_X86_64)
485 prstatusx32_t prstat;
486 memset (&prstat, 0, sizeof (prstat));
488 prstat.pr_cursig = cursig;
489 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
490 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
491 &prstat, sizeof (prstat));
496 memset (&prstat, 0, sizeof (prstat));
498 prstat.pr_cursig = cursig;
499 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
500 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
501 &prstat, sizeof (prstat));
507 memset (&prstat, 0, sizeof (prstat));
509 prstat.pr_cursig = cursig;
510 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
511 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
512 &prstat, sizeof (prstat));
519 /* Functions for the x86-64 ELF linker. */
521 /* The name of the dynamic interpreter. This is put in the .interp
524 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
525 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
527 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
528 copying dynamic variables from a shared lib into an app's dynbss
529 section, and instead use a dynamic relocation to point into the
531 #define ELIMINATE_COPY_RELOCS 1
533 /* The size in bytes of an entry in the global offset table. */
535 #define GOT_ENTRY_SIZE 8
537 /* The size in bytes of an entry in the procedure linkage table. */
539 #define PLT_ENTRY_SIZE 16
541 /* The first entry in a procedure linkage table looks like this. See the
542 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
544 static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
546 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
547 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
548 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
551 /* Subsequent entries in a procedure linkage table look like this. */
553 static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
555 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
556 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
557 0x68, /* pushq immediate */
558 0, 0, 0, 0, /* replaced with index into relocation table. */
559 0xe9, /* jmp relative */
560 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
563 /* The first entry in a procedure linkage table with BND relocations
566 static const bfd_byte elf_x86_64_bnd_plt0_entry[PLT_ENTRY_SIZE] =
568 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
569 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
570 0x0f, 0x1f, 0 /* nopl (%rax) */
573 /* Subsequent entries for legacy branches in a procedure linkage table
574 with BND relocations look like this. */
576 static const bfd_byte elf_x86_64_legacy_plt_entry[PLT_ENTRY_SIZE] =
578 0x68, 0, 0, 0, 0, /* pushq immediate */
579 0xe9, 0, 0, 0, 0, /* jmpq relative */
580 0x66, 0x0f, 0x1f, 0x44, 0, 0 /* nopw (%rax,%rax,1) */
583 /* Subsequent entries for branches with BND prefx in a procedure linkage
584 table with BND relocations look like this. */
586 static const bfd_byte elf_x86_64_bnd_plt_entry[PLT_ENTRY_SIZE] =
588 0x68, 0, 0, 0, 0, /* pushq immediate */
589 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
590 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
593 /* Entries for legacy branches in the second procedure linkage table
596 static const bfd_byte elf_x86_64_legacy_plt2_entry[8] =
598 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
599 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* Entries for branches with BND prefix in the second procedure linkage
604 table look like this. */
606 static const bfd_byte elf_x86_64_bnd_plt2_entry[8] =
608 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
609 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
613 /* .eh_frame covering the .plt section. */
615 static const bfd_byte elf_x86_64_eh_frame_plt[] =
617 #define PLT_CIE_LENGTH 20
618 #define PLT_FDE_LENGTH 36
619 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
620 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
621 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
622 0, 0, 0, 0, /* CIE ID */
624 'z', 'R', 0, /* Augmentation string */
625 1, /* Code alignment factor */
626 0x78, /* Data alignment factor */
627 16, /* Return address column */
628 1, /* Augmentation size */
629 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
630 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
631 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
632 DW_CFA_nop, DW_CFA_nop,
634 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
635 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
636 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
637 0, 0, 0, 0, /* .plt size goes here */
638 0, /* Augmentation size */
639 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
640 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
641 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
642 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
643 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
644 11, /* Block length */
645 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
646 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
647 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
648 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
649 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
652 /* Architecture-specific backend data for x86-64. */
654 struct elf_x86_64_backend_data
656 /* Templates for the initial PLT entry and for subsequent entries. */
657 const bfd_byte *plt0_entry;
658 const bfd_byte *plt_entry;
659 unsigned int plt_entry_size; /* Size of each PLT entry. */
661 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
662 unsigned int plt0_got1_offset;
663 unsigned int plt0_got2_offset;
665 /* Offset of the end of the PC-relative instruction containing
667 unsigned int plt0_got2_insn_end;
669 /* Offsets into plt_entry that are to be replaced with... */
670 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
671 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
672 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
674 /* Length of the PC-relative instruction containing plt_got_offset. */
675 unsigned int plt_got_insn_size;
677 /* Offset of the end of the PC-relative jump to plt0_entry. */
678 unsigned int plt_plt_insn_end;
680 /* Offset into plt_entry where the initial value of the GOT entry points. */
681 unsigned int plt_lazy_offset;
683 /* .eh_frame covering the .plt section. */
684 const bfd_byte *eh_frame_plt;
685 unsigned int eh_frame_plt_size;
688 #define get_elf_x86_64_arch_data(bed) \
689 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
691 #define get_elf_x86_64_backend_data(abfd) \
692 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
694 #define GET_PLT_ENTRY_SIZE(abfd) \
695 get_elf_x86_64_backend_data (abfd)->plt_entry_size
697 /* These are the standard parameters. */
698 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
700 elf_x86_64_plt0_entry, /* plt0_entry */
701 elf_x86_64_plt_entry, /* plt_entry */
702 sizeof (elf_x86_64_plt_entry), /* plt_entry_size */
703 2, /* plt0_got1_offset */
704 8, /* plt0_got2_offset */
705 12, /* plt0_got2_insn_end */
706 2, /* plt_got_offset */
707 7, /* plt_reloc_offset */
708 12, /* plt_plt_offset */
709 6, /* plt_got_insn_size */
710 PLT_ENTRY_SIZE, /* plt_plt_insn_end */
711 6, /* plt_lazy_offset */
712 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
713 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
716 static const struct elf_x86_64_backend_data elf_x86_64_bnd_arch_bed =
718 elf_x86_64_bnd_plt0_entry, /* plt0_entry */
719 elf_x86_64_bnd_plt_entry, /* plt_entry */
720 sizeof (elf_x86_64_bnd_plt_entry), /* plt_entry_size */
721 2, /* plt0_got1_offset */
722 1+8, /* plt0_got2_offset */
723 1+12, /* plt0_got2_insn_end */
724 1+2, /* plt_got_offset */
725 1, /* plt_reloc_offset */
726 7, /* plt_plt_offset */
727 1+6, /* plt_got_insn_size */
728 11, /* plt_plt_insn_end */
729 0, /* plt_lazy_offset */
730 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
731 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
734 #define elf_backend_arch_data &elf_x86_64_arch_bed
736 /* x86-64 ELF linker hash entry. */
738 struct elf_x86_64_link_hash_entry
740 struct elf_link_hash_entry elf;
742 /* Track dynamic relocs copied for this symbol. */
743 struct elf_dyn_relocs *dyn_relocs;
745 #define GOT_UNKNOWN 0
749 #define GOT_TLS_GDESC 4
750 #define GOT_TLS_GD_BOTH_P(type) \
751 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
752 #define GOT_TLS_GD_P(type) \
753 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
754 #define GOT_TLS_GDESC_P(type) \
755 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
756 #define GOT_TLS_GD_ANY_P(type) \
757 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
758 unsigned char tls_type;
760 /* TRUE if symbol has at least one BND relocation. */
761 bfd_boolean has_bnd_reloc;
763 /* Information about the second PLT entry. Filled when has_bnd_reloc is
765 union gotplt_union plt_bnd;
767 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
768 starting at the end of the jump table. */
772 #define elf_x86_64_hash_entry(ent) \
773 ((struct elf_x86_64_link_hash_entry *)(ent))
775 struct elf_x86_64_obj_tdata
777 struct elf_obj_tdata root;
779 /* tls_type for each local got entry. */
780 char *local_got_tls_type;
782 /* GOTPLT entries for TLS descriptors. */
783 bfd_vma *local_tlsdesc_gotent;
786 #define elf_x86_64_tdata(abfd) \
787 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
789 #define elf_x86_64_local_got_tls_type(abfd) \
790 (elf_x86_64_tdata (abfd)->local_got_tls_type)
792 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
793 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
795 #define is_x86_64_elf(bfd) \
796 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
797 && elf_tdata (bfd) != NULL \
798 && elf_object_id (bfd) == X86_64_ELF_DATA)
801 elf_x86_64_mkobject (bfd *abfd)
803 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
807 /* x86-64 ELF linker hash table. */
809 struct elf_x86_64_link_hash_table
811 struct elf_link_hash_table elf;
813 /* Short-cuts to get to dynamic linker sections. */
816 asection *plt_eh_frame;
821 bfd_signed_vma refcount;
825 /* The amount of space used by the jump slots in the GOT. */
826 bfd_vma sgotplt_jump_table_size;
828 /* Small local sym cache. */
829 struct sym_cache sym_cache;
831 bfd_vma (*r_info) (bfd_vma, bfd_vma);
832 bfd_vma (*r_sym) (bfd_vma);
833 unsigned int pointer_r_type;
834 const char *dynamic_interpreter;
835 int dynamic_interpreter_size;
837 /* _TLS_MODULE_BASE_ symbol. */
838 struct bfd_link_hash_entry *tls_module_base;
840 /* Used by local STT_GNU_IFUNC symbols. */
841 htab_t loc_hash_table;
842 void * loc_hash_memory;
844 /* The offset into splt of the PLT entry for the TLS descriptor
845 resolver. Special values are 0, if not necessary (or not found
846 to be necessary yet), and -1 if needed but not determined
849 /* The offset into sgot of the GOT entry used by the PLT entry
853 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
854 bfd_vma next_jump_slot_index;
855 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
856 bfd_vma next_irelative_index;
859 /* Get the x86-64 ELF linker hash table from a link_info structure. */
861 #define elf_x86_64_hash_table(p) \
862 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
863 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
865 #define elf_x86_64_compute_jump_table_size(htab) \
866 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
868 /* Create an entry in an x86-64 ELF linker hash table. */
870 static struct bfd_hash_entry *
871 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
872 struct bfd_hash_table *table,
875 /* Allocate the structure if it has not already been allocated by a
879 entry = (struct bfd_hash_entry *)
880 bfd_hash_allocate (table,
881 sizeof (struct elf_x86_64_link_hash_entry));
886 /* Call the allocation method of the superclass. */
887 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
890 struct elf_x86_64_link_hash_entry *eh;
892 eh = (struct elf_x86_64_link_hash_entry *) entry;
893 eh->dyn_relocs = NULL;
894 eh->tls_type = GOT_UNKNOWN;
895 eh->has_bnd_reloc = FALSE;
896 eh->plt_bnd.offset = (bfd_vma) -1;
897 eh->tlsdesc_got = (bfd_vma) -1;
903 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
904 for local symbol so that we can handle local STT_GNU_IFUNC symbols
905 as global symbol. We reuse indx and dynstr_index for local symbol
906 hash since they aren't used by global symbols in this backend. */
909 elf_x86_64_local_htab_hash (const void *ptr)
911 struct elf_link_hash_entry *h
912 = (struct elf_link_hash_entry *) ptr;
913 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
916 /* Compare local hash entries. */
919 elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
921 struct elf_link_hash_entry *h1
922 = (struct elf_link_hash_entry *) ptr1;
923 struct elf_link_hash_entry *h2
924 = (struct elf_link_hash_entry *) ptr2;
926 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
929 /* Find and/or create a hash entry for local symbol. */
931 static struct elf_link_hash_entry *
932 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
933 bfd *abfd, const Elf_Internal_Rela *rel,
936 struct elf_x86_64_link_hash_entry e, *ret;
937 asection *sec = abfd->sections;
938 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
939 htab->r_sym (rel->r_info));
942 e.elf.indx = sec->id;
943 e.elf.dynstr_index = htab->r_sym (rel->r_info);
944 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
945 create ? INSERT : NO_INSERT);
952 ret = (struct elf_x86_64_link_hash_entry *) *slot;
956 ret = (struct elf_x86_64_link_hash_entry *)
957 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
958 sizeof (struct elf_x86_64_link_hash_entry));
961 memset (ret, 0, sizeof (*ret));
962 ret->elf.indx = sec->id;
963 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
964 ret->elf.dynindx = -1;
970 /* Create an X86-64 ELF linker hash table. */
972 static struct bfd_link_hash_table *
973 elf_x86_64_link_hash_table_create (bfd *abfd)
975 struct elf_x86_64_link_hash_table *ret;
976 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
978 ret = (struct elf_x86_64_link_hash_table *) bfd_zmalloc (amt);
982 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
983 elf_x86_64_link_hash_newfunc,
984 sizeof (struct elf_x86_64_link_hash_entry),
993 ret->r_info = elf64_r_info;
994 ret->r_sym = elf64_r_sym;
995 ret->pointer_r_type = R_X86_64_64;
996 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
997 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
1001 ret->r_info = elf32_r_info;
1002 ret->r_sym = elf32_r_sym;
1003 ret->pointer_r_type = R_X86_64_32;
1004 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
1005 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
1008 ret->loc_hash_table = htab_try_create (1024,
1009 elf_x86_64_local_htab_hash,
1010 elf_x86_64_local_htab_eq,
1012 ret->loc_hash_memory = objalloc_create ();
1013 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1019 return &ret->elf.root;
1022 /* Destroy an X86-64 ELF linker hash table. */
1025 elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash)
1027 struct elf_x86_64_link_hash_table *htab
1028 = (struct elf_x86_64_link_hash_table *) hash;
1030 if (htab->loc_hash_table)
1031 htab_delete (htab->loc_hash_table);
1032 if (htab->loc_hash_memory)
1033 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1034 _bfd_elf_link_hash_table_free (hash);
1037 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
1038 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
1042 elf_x86_64_create_dynamic_sections (bfd *dynobj,
1043 struct bfd_link_info *info)
1045 struct elf_x86_64_link_hash_table *htab;
1047 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1050 htab = elf_x86_64_hash_table (info);
1054 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1056 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
1059 || (!info->shared && !htab->srelbss))
1062 if (!info->no_ld_generated_unwind_info
1063 && htab->plt_eh_frame == NULL
1064 && htab->elf.splt != NULL)
1066 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1067 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1068 | SEC_LINKER_CREATED);
1070 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1071 if (htab->plt_eh_frame == NULL
1072 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
1078 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1081 elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1082 struct elf_link_hash_entry *dir,
1083 struct elf_link_hash_entry *ind)
1085 struct elf_x86_64_link_hash_entry *edir, *eind;
1087 edir = (struct elf_x86_64_link_hash_entry *) dir;
1088 eind = (struct elf_x86_64_link_hash_entry *) ind;
1090 if (!edir->has_bnd_reloc)
1091 edir->has_bnd_reloc = eind->has_bnd_reloc;
1093 if (eind->dyn_relocs != NULL)
1095 if (edir->dyn_relocs != NULL)
1097 struct elf_dyn_relocs **pp;
1098 struct elf_dyn_relocs *p;
1100 /* Add reloc counts against the indirect sym to the direct sym
1101 list. Merge any entries against the same section. */
1102 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1104 struct elf_dyn_relocs *q;
1106 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1107 if (q->sec == p->sec)
1109 q->pc_count += p->pc_count;
1110 q->count += p->count;
1117 *pp = edir->dyn_relocs;
1120 edir->dyn_relocs = eind->dyn_relocs;
1121 eind->dyn_relocs = NULL;
1124 if (ind->root.type == bfd_link_hash_indirect
1125 && dir->got.refcount <= 0)
1127 edir->tls_type = eind->tls_type;
1128 eind->tls_type = GOT_UNKNOWN;
1131 if (ELIMINATE_COPY_RELOCS
1132 && ind->root.type != bfd_link_hash_indirect
1133 && dir->dynamic_adjusted)
1135 /* If called to transfer flags for a weakdef during processing
1136 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1137 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1138 dir->ref_dynamic |= ind->ref_dynamic;
1139 dir->ref_regular |= ind->ref_regular;
1140 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1141 dir->needs_plt |= ind->needs_plt;
1142 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1145 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1149 elf64_x86_64_elf_object_p (bfd *abfd)
1151 /* Set the right machine number for an x86-64 elf64 file. */
1152 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
1157 elf32_x86_64_elf_object_p (bfd *abfd)
1159 /* Set the right machine number for an x86-64 elf32 file. */
1160 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1164 /* Return TRUE if the TLS access code sequence support transition
1168 elf_x86_64_check_tls_transition (bfd *abfd,
1169 struct bfd_link_info *info,
1172 Elf_Internal_Shdr *symtab_hdr,
1173 struct elf_link_hash_entry **sym_hashes,
1174 unsigned int r_type,
1175 const Elf_Internal_Rela *rel,
1176 const Elf_Internal_Rela *relend)
1179 unsigned long r_symndx;
1180 bfd_boolean largepic = FALSE;
1181 struct elf_link_hash_entry *h;
1183 struct elf_x86_64_link_hash_table *htab;
1185 /* Get the section contents. */
1186 if (contents == NULL)
1188 if (elf_section_data (sec)->this_hdr.contents != NULL)
1189 contents = elf_section_data (sec)->this_hdr.contents;
1192 /* FIXME: How to better handle error condition? */
1193 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1196 /* Cache the section contents for elf_link_input_bfd. */
1197 elf_section_data (sec)->this_hdr.contents = contents;
1201 htab = elf_x86_64_hash_table (info);
1202 offset = rel->r_offset;
1205 case R_X86_64_TLSGD:
1206 case R_X86_64_TLSLD:
1207 if ((rel + 1) >= relend)
1210 if (r_type == R_X86_64_TLSGD)
1212 /* Check transition from GD access model. For 64bit, only
1213 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1214 .word 0x6666; rex64; call __tls_get_addr
1215 can transit to different access model. For 32bit, only
1216 leaq foo@tlsgd(%rip), %rdi
1217 .word 0x6666; rex64; call __tls_get_addr
1218 can transit to different access model. For largepic
1220 leaq foo@tlsgd(%rip), %rdi
1221 movabsq $__tls_get_addr@pltoff, %rax
1225 static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
1226 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1228 if ((offset + 12) > sec->size)
1231 if (memcmp (contents + offset + 4, call, 4) != 0)
1233 if (!ABI_64_P (abfd)
1234 || (offset + 19) > sec->size
1236 || memcmp (contents + offset - 3, leaq + 1, 3) != 0
1237 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1238 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1243 else if (ABI_64_P (abfd))
1246 || memcmp (contents + offset - 4, leaq, 4) != 0)
1252 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
1258 /* Check transition from LD access model. Only
1259 leaq foo@tlsld(%rip), %rdi;
1261 can transit to different access model. For largepic
1263 leaq foo@tlsld(%rip), %rdi
1264 movabsq $__tls_get_addr@pltoff, %rax
1268 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
1270 if (offset < 3 || (offset + 9) > sec->size)
1273 if (memcmp (contents + offset - 3, lea, 3) != 0)
1276 if (0xe8 != *(contents + offset + 4))
1278 if (!ABI_64_P (abfd)
1279 || (offset + 19) > sec->size
1280 || memcmp (contents + offset + 4, "\x48\xb8", 2) != 0
1281 || memcmp (contents + offset + 14, "\x48\x01\xd8\xff\xd0", 5)
1288 r_symndx = htab->r_sym (rel[1].r_info);
1289 if (r_symndx < symtab_hdr->sh_info)
1292 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1293 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1294 may be versioned. */
1296 && h->root.root.string != NULL
1298 ? ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64
1299 : (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1300 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32))
1301 && (strncmp (h->root.root.string,
1302 "__tls_get_addr", 14) == 0));
1304 case R_X86_64_GOTTPOFF:
1305 /* Check transition from IE access model:
1306 mov foo@gottpoff(%rip), %reg
1307 add foo@gottpoff(%rip), %reg
1310 /* Check REX prefix first. */
1311 if (offset >= 3 && (offset + 4) <= sec->size)
1313 val = bfd_get_8 (abfd, contents + offset - 3);
1314 if (val != 0x48 && val != 0x4c)
1316 /* X32 may have 0x44 REX prefix or no REX prefix. */
1317 if (ABI_64_P (abfd))
1323 /* X32 may not have any REX prefix. */
1324 if (ABI_64_P (abfd))
1326 if (offset < 2 || (offset + 3) > sec->size)
1330 val = bfd_get_8 (abfd, contents + offset - 2);
1331 if (val != 0x8b && val != 0x03)
1334 val = bfd_get_8 (abfd, contents + offset - 1);
1335 return (val & 0xc7) == 5;
1337 case R_X86_64_GOTPC32_TLSDESC:
1338 /* Check transition from GDesc access model:
1339 leaq x@tlsdesc(%rip), %rax
1341 Make sure it's a leaq adding rip to a 32-bit offset
1342 into any register, although it's probably almost always
1345 if (offset < 3 || (offset + 4) > sec->size)
1348 val = bfd_get_8 (abfd, contents + offset - 3);
1349 if ((val & 0xfb) != 0x48)
1352 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1355 val = bfd_get_8 (abfd, contents + offset - 1);
1356 return (val & 0xc7) == 0x05;
1358 case R_X86_64_TLSDESC_CALL:
1359 /* Check transition from GDesc access model:
1360 call *x@tlsdesc(%rax)
1362 if (offset + 2 <= sec->size)
1364 /* Make sure that it's a call *x@tlsdesc(%rax). */
1365 static const unsigned char call[] = { 0xff, 0x10 };
1366 return memcmp (contents + offset, call, 2) == 0;
1376 /* Return TRUE if the TLS access transition is OK or no transition
1377 will be performed. Update R_TYPE if there is a transition. */
1380 elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1381 asection *sec, bfd_byte *contents,
1382 Elf_Internal_Shdr *symtab_hdr,
1383 struct elf_link_hash_entry **sym_hashes,
1384 unsigned int *r_type, int tls_type,
1385 const Elf_Internal_Rela *rel,
1386 const Elf_Internal_Rela *relend,
1387 struct elf_link_hash_entry *h,
1388 unsigned long r_symndx)
1390 unsigned int from_type = *r_type;
1391 unsigned int to_type = from_type;
1392 bfd_boolean check = TRUE;
1394 /* Skip TLS transition for functions. */
1396 && (h->type == STT_FUNC
1397 || h->type == STT_GNU_IFUNC))
1402 case R_X86_64_TLSGD:
1403 case R_X86_64_GOTPC32_TLSDESC:
1404 case R_X86_64_TLSDESC_CALL:
1405 case R_X86_64_GOTTPOFF:
1406 if (info->executable)
1409 to_type = R_X86_64_TPOFF32;
1411 to_type = R_X86_64_GOTTPOFF;
1414 /* When we are called from elf_x86_64_relocate_section,
1415 CONTENTS isn't NULL and there may be additional transitions
1416 based on TLS_TYPE. */
1417 if (contents != NULL)
1419 unsigned int new_to_type = to_type;
1421 if (info->executable
1424 && tls_type == GOT_TLS_IE)
1425 new_to_type = R_X86_64_TPOFF32;
1427 if (to_type == R_X86_64_TLSGD
1428 || to_type == R_X86_64_GOTPC32_TLSDESC
1429 || to_type == R_X86_64_TLSDESC_CALL)
1431 if (tls_type == GOT_TLS_IE)
1432 new_to_type = R_X86_64_GOTTPOFF;
1435 /* We checked the transition before when we were called from
1436 elf_x86_64_check_relocs. We only want to check the new
1437 transition which hasn't been checked before. */
1438 check = new_to_type != to_type && from_type == to_type;
1439 to_type = new_to_type;
1444 case R_X86_64_TLSLD:
1445 if (info->executable)
1446 to_type = R_X86_64_TPOFF32;
1453 /* Return TRUE if there is no transition. */
1454 if (from_type == to_type)
1457 /* Check if the transition can be performed. */
1459 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1460 symtab_hdr, sym_hashes,
1461 from_type, rel, relend))
1463 reloc_howto_type *from, *to;
1466 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1467 to = elf_x86_64_rtype_to_howto (abfd, to_type);
1470 name = h->root.root.string;
1473 struct elf_x86_64_link_hash_table *htab;
1475 htab = elf_x86_64_hash_table (info);
1480 Elf_Internal_Sym *isym;
1482 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1484 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1488 (*_bfd_error_handler)
1489 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1490 "in section `%A' failed"),
1491 abfd, sec, from->name, to->name, name,
1492 (unsigned long) rel->r_offset);
1493 bfd_set_error (bfd_error_bad_value);
1501 /* Look through the relocs for a section during the first phase, and
1502 calculate needed space in the global offset table, procedure
1503 linkage table, and dynamic reloc sections. */
1506 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1508 const Elf_Internal_Rela *relocs)
1510 struct elf_x86_64_link_hash_table *htab;
1511 Elf_Internal_Shdr *symtab_hdr;
1512 struct elf_link_hash_entry **sym_hashes;
1513 const Elf_Internal_Rela *rel;
1514 const Elf_Internal_Rela *rel_end;
1517 if (info->relocatable)
1520 BFD_ASSERT (is_x86_64_elf (abfd));
1522 htab = elf_x86_64_hash_table (info);
1526 symtab_hdr = &elf_symtab_hdr (abfd);
1527 sym_hashes = elf_sym_hashes (abfd);
1531 rel_end = relocs + sec->reloc_count;
1532 for (rel = relocs; rel < rel_end; rel++)
1534 unsigned int r_type;
1535 unsigned long r_symndx;
1536 struct elf_link_hash_entry *h;
1537 Elf_Internal_Sym *isym;
1539 bfd_boolean size_reloc;
1541 r_symndx = htab->r_sym (rel->r_info);
1542 r_type = ELF32_R_TYPE (rel->r_info);
1544 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1546 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1551 if (r_symndx < symtab_hdr->sh_info)
1553 /* A local symbol. */
1554 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1559 /* Check relocation against local STT_GNU_IFUNC symbol. */
1560 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1562 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1567 /* Fake a STT_GNU_IFUNC symbol. */
1568 h->type = STT_GNU_IFUNC;
1571 h->forced_local = 1;
1572 h->root.type = bfd_link_hash_defined;
1580 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1581 while (h->root.type == bfd_link_hash_indirect
1582 || h->root.type == bfd_link_hash_warning)
1583 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1586 /* Check invalid x32 relocations. */
1587 if (!ABI_64_P (abfd))
1593 case R_X86_64_DTPOFF64:
1594 case R_X86_64_TPOFF64:
1596 case R_X86_64_GOTOFF64:
1597 case R_X86_64_GOT64:
1598 case R_X86_64_GOTPCREL64:
1599 case R_X86_64_GOTPC64:
1600 case R_X86_64_GOTPLT64:
1601 case R_X86_64_PLTOFF64:
1604 name = h->root.root.string;
1606 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1608 (*_bfd_error_handler)
1609 (_("%B: relocation %s against symbol `%s' isn't "
1610 "supported in x32 mode"), abfd,
1611 x86_64_elf_howto_table[r_type].name, name);
1612 bfd_set_error (bfd_error_bad_value);
1620 /* Create the ifunc sections for static executables. If we
1621 never see an indirect function symbol nor we are building
1622 a static executable, those sections will be empty and
1623 won't appear in output. */
1629 case R_X86_64_PC32_BND:
1630 case R_X86_64_PLT32_BND:
1631 /* MPX PLT is supported only if elf_x86_64_arch_bed
1632 is used in 64-bit mode. */
1634 && (get_elf_x86_64_backend_data (abfd)
1635 == &elf_x86_64_arch_bed))
1637 elf_x86_64_hash_entry (h)->has_bnd_reloc = TRUE;
1639 /* Create the second PLT for Intel MPX support. */
1640 if (htab->plt_bnd == NULL)
1642 unsigned int plt_bnd_align;
1643 const struct elf_backend_data *bed;
1645 bed = get_elf_backend_data (info->output_bfd);
1646 switch (sizeof (elf_x86_64_bnd_plt2_entry))
1658 if (htab->elf.dynobj == NULL)
1659 htab->elf.dynobj = abfd;
1661 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1663 (bed->dynamic_sec_flags
1668 if (htab->plt_bnd == NULL
1669 || !bfd_set_section_alignment (htab->elf.dynobj,
1681 case R_X86_64_PLT32:
1682 case R_X86_64_GOTPCREL:
1683 case R_X86_64_GOTPCREL64:
1684 if (htab->elf.dynobj == NULL)
1685 htab->elf.dynobj = abfd;
1686 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1691 /* It is referenced by a non-shared object. */
1693 h->root.non_ir_ref = 1;
1696 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1697 symtab_hdr, sym_hashes,
1698 &r_type, GOT_UNKNOWN,
1699 rel, rel_end, h, r_symndx))
1704 case R_X86_64_TLSLD:
1705 htab->tls_ld_got.refcount += 1;
1708 case R_X86_64_TPOFF32:
1709 if (!info->executable && ABI_64_P (abfd))
1712 name = h->root.root.string;
1714 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1716 (*_bfd_error_handler)
1717 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1719 x86_64_elf_howto_table[r_type].name, name);
1720 bfd_set_error (bfd_error_bad_value);
1725 case R_X86_64_GOTTPOFF:
1726 if (!info->executable)
1727 info->flags |= DF_STATIC_TLS;
1730 case R_X86_64_GOT32:
1731 case R_X86_64_GOTPCREL:
1732 case R_X86_64_TLSGD:
1733 case R_X86_64_GOT64:
1734 case R_X86_64_GOTPCREL64:
1735 case R_X86_64_GOTPLT64:
1736 case R_X86_64_GOTPC32_TLSDESC:
1737 case R_X86_64_TLSDESC_CALL:
1738 /* This symbol requires a global offset table entry. */
1740 int tls_type, old_tls_type;
1744 default: tls_type = GOT_NORMAL; break;
1745 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1746 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
1747 case R_X86_64_GOTPC32_TLSDESC:
1748 case R_X86_64_TLSDESC_CALL:
1749 tls_type = GOT_TLS_GDESC; break;
1754 if (r_type == R_X86_64_GOTPLT64)
1756 /* This relocation indicates that we also need
1757 a PLT entry, as this is a function. We don't need
1758 a PLT entry for local symbols. */
1760 h->plt.refcount += 1;
1762 h->got.refcount += 1;
1763 old_tls_type = elf_x86_64_hash_entry (h)->tls_type;
1767 bfd_signed_vma *local_got_refcounts;
1769 /* This is a global offset table entry for a local symbol. */
1770 local_got_refcounts = elf_local_got_refcounts (abfd);
1771 if (local_got_refcounts == NULL)
1775 size = symtab_hdr->sh_info;
1776 size *= sizeof (bfd_signed_vma)
1777 + sizeof (bfd_vma) + sizeof (char);
1778 local_got_refcounts = ((bfd_signed_vma *)
1779 bfd_zalloc (abfd, size));
1780 if (local_got_refcounts == NULL)
1782 elf_local_got_refcounts (abfd) = local_got_refcounts;
1783 elf_x86_64_local_tlsdesc_gotent (abfd)
1784 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1785 elf_x86_64_local_got_tls_type (abfd)
1786 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1788 local_got_refcounts[r_symndx] += 1;
1790 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
1793 /* If a TLS symbol is accessed using IE at least once,
1794 there is no point to use dynamic model for it. */
1795 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1796 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1797 || tls_type != GOT_TLS_IE))
1799 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
1800 tls_type = old_tls_type;
1801 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1802 && GOT_TLS_GD_ANY_P (tls_type))
1803 tls_type |= old_tls_type;
1807 name = h->root.root.string;
1809 name = bfd_elf_sym_name (abfd, symtab_hdr,
1811 (*_bfd_error_handler)
1812 (_("%B: '%s' accessed both as normal and thread local symbol"),
1814 bfd_set_error (bfd_error_bad_value);
1819 if (old_tls_type != tls_type)
1822 elf_x86_64_hash_entry (h)->tls_type = tls_type;
1824 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
1829 case R_X86_64_GOTOFF64:
1830 case R_X86_64_GOTPC32:
1831 case R_X86_64_GOTPC64:
1833 if (htab->elf.sgot == NULL)
1835 if (htab->elf.dynobj == NULL)
1836 htab->elf.dynobj = abfd;
1837 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1843 case R_X86_64_PLT32:
1844 case R_X86_64_PLT32_BND:
1845 /* This symbol requires a procedure linkage table entry. We
1846 actually build the entry in adjust_dynamic_symbol,
1847 because this might be a case of linking PIC code which is
1848 never referenced by a dynamic object, in which case we
1849 don't need to generate a procedure linkage table entry
1852 /* If this is a local symbol, we resolve it directly without
1853 creating a procedure linkage table entry. */
1858 h->plt.refcount += 1;
1861 case R_X86_64_PLTOFF64:
1862 /* This tries to form the 'address' of a function relative
1863 to GOT. For global symbols we need a PLT entry. */
1867 h->plt.refcount += 1;
1871 case R_X86_64_SIZE32:
1872 case R_X86_64_SIZE64:
1877 if (!ABI_64_P (abfd))
1882 /* Let's help debug shared library creation. These relocs
1883 cannot be used in shared libs. Don't error out for
1884 sections we don't care about, such as debug sections or
1885 non-constant sections. */
1887 && (sec->flags & SEC_ALLOC) != 0
1888 && (sec->flags & SEC_READONLY) != 0)
1891 name = h->root.root.string;
1893 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1894 (*_bfd_error_handler)
1895 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1896 abfd, x86_64_elf_howto_table[r_type].name, name);
1897 bfd_set_error (bfd_error_bad_value);
1905 case R_X86_64_PC32_BND:
1909 if (h != NULL && info->executable)
1911 /* If this reloc is in a read-only section, we might
1912 need a copy reloc. We can't check reliably at this
1913 stage whether the section is read-only, as input
1914 sections have not yet been mapped to output sections.
1915 Tentatively set the flag for now, and correct in
1916 adjust_dynamic_symbol. */
1919 /* We may need a .plt entry if the function this reloc
1920 refers to is in a shared lib. */
1921 h->plt.refcount += 1;
1922 if (r_type != R_X86_64_PC32
1923 && r_type != R_X86_64_PC32_BND
1924 && r_type != R_X86_64_PC64)
1925 h->pointer_equality_needed = 1;
1930 /* If we are creating a shared library, and this is a reloc
1931 against a global symbol, or a non PC relative reloc
1932 against a local symbol, then we need to copy the reloc
1933 into the shared library. However, if we are linking with
1934 -Bsymbolic, we do not need to copy a reloc against a
1935 global symbol which is defined in an object we are
1936 including in the link (i.e., DEF_REGULAR is set). At
1937 this point we have not seen all the input files, so it is
1938 possible that DEF_REGULAR is not set now but will be set
1939 later (it is never cleared). In case of a weak definition,
1940 DEF_REGULAR may be cleared later by a strong definition in
1941 a shared library. We account for that possibility below by
1942 storing information in the relocs_copied field of the hash
1943 table entry. A similar situation occurs when creating
1944 shared libraries and symbol visibility changes render the
1947 If on the other hand, we are creating an executable, we
1948 may need to keep relocations for symbols satisfied by a
1949 dynamic library if we manage to avoid copy relocs for the
1952 && (sec->flags & SEC_ALLOC) != 0
1953 && (! IS_X86_64_PCREL_TYPE (r_type)
1955 && (! SYMBOLIC_BIND (info, h)
1956 || h->root.type == bfd_link_hash_defweak
1957 || !h->def_regular))))
1958 || (ELIMINATE_COPY_RELOCS
1960 && (sec->flags & SEC_ALLOC) != 0
1962 && (h->root.type == bfd_link_hash_defweak
1963 || !h->def_regular)))
1965 struct elf_dyn_relocs *p;
1966 struct elf_dyn_relocs **head;
1968 /* We must copy these reloc types into the output file.
1969 Create a reloc section in dynobj and make room for
1973 if (htab->elf.dynobj == NULL)
1974 htab->elf.dynobj = abfd;
1976 sreloc = _bfd_elf_make_dynamic_reloc_section
1977 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
1978 abfd, /*rela?*/ TRUE);
1984 /* If this is a global symbol, we count the number of
1985 relocations we need for this symbol. */
1988 head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs;
1992 /* Track dynamic relocs needed for local syms too.
1993 We really need local syms available to do this
1998 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2003 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2007 /* Beware of type punned pointers vs strict aliasing
2009 vpp = &(elf_section_data (s)->local_dynrel);
2010 head = (struct elf_dyn_relocs **)vpp;
2014 if (p == NULL || p->sec != sec)
2016 bfd_size_type amt = sizeof *p;
2018 p = ((struct elf_dyn_relocs *)
2019 bfd_alloc (htab->elf.dynobj, amt));
2030 /* Count size relocation as PC-relative relocation. */
2031 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
2036 /* This relocation describes the C++ object vtable hierarchy.
2037 Reconstruct it for later use during GC. */
2038 case R_X86_64_GNU_VTINHERIT:
2039 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2043 /* This relocation describes which C++ vtable entries are actually
2044 used. Record for later use during GC. */
2045 case R_X86_64_GNU_VTENTRY:
2046 BFD_ASSERT (h != NULL);
2048 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2060 /* Return the section that should be marked against GC for a given
2064 elf_x86_64_gc_mark_hook (asection *sec,
2065 struct bfd_link_info *info,
2066 Elf_Internal_Rela *rel,
2067 struct elf_link_hash_entry *h,
2068 Elf_Internal_Sym *sym)
2071 switch (ELF32_R_TYPE (rel->r_info))
2073 case R_X86_64_GNU_VTINHERIT:
2074 case R_X86_64_GNU_VTENTRY:
2078 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2081 /* Update the got entry reference counts for the section being removed. */
2084 elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
2086 const Elf_Internal_Rela *relocs)
2088 struct elf_x86_64_link_hash_table *htab;
2089 Elf_Internal_Shdr *symtab_hdr;
2090 struct elf_link_hash_entry **sym_hashes;
2091 bfd_signed_vma *local_got_refcounts;
2092 const Elf_Internal_Rela *rel, *relend;
2094 if (info->relocatable)
2097 htab = elf_x86_64_hash_table (info);
2101 elf_section_data (sec)->local_dynrel = NULL;
2103 symtab_hdr = &elf_symtab_hdr (abfd);
2104 sym_hashes = elf_sym_hashes (abfd);
2105 local_got_refcounts = elf_local_got_refcounts (abfd);
2107 htab = elf_x86_64_hash_table (info);
2108 relend = relocs + sec->reloc_count;
2109 for (rel = relocs; rel < relend; rel++)
2111 unsigned long r_symndx;
2112 unsigned int r_type;
2113 struct elf_link_hash_entry *h = NULL;
2115 r_symndx = htab->r_sym (rel->r_info);
2116 if (r_symndx >= symtab_hdr->sh_info)
2118 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2119 while (h->root.type == bfd_link_hash_indirect
2120 || h->root.type == bfd_link_hash_warning)
2121 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2125 /* A local symbol. */
2126 Elf_Internal_Sym *isym;
2128 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2131 /* Check relocation against local STT_GNU_IFUNC symbol. */
2133 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2135 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE);
2143 struct elf_x86_64_link_hash_entry *eh;
2144 struct elf_dyn_relocs **pp;
2145 struct elf_dyn_relocs *p;
2147 eh = (struct elf_x86_64_link_hash_entry *) h;
2149 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2152 /* Everything must go for SEC. */
2158 r_type = ELF32_R_TYPE (rel->r_info);
2159 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
2160 symtab_hdr, sym_hashes,
2161 &r_type, GOT_UNKNOWN,
2162 rel, relend, h, r_symndx))
2167 case R_X86_64_TLSLD:
2168 if (htab->tls_ld_got.refcount > 0)
2169 htab->tls_ld_got.refcount -= 1;
2172 case R_X86_64_TLSGD:
2173 case R_X86_64_GOTPC32_TLSDESC:
2174 case R_X86_64_TLSDESC_CALL:
2175 case R_X86_64_GOTTPOFF:
2176 case R_X86_64_GOT32:
2177 case R_X86_64_GOTPCREL:
2178 case R_X86_64_GOT64:
2179 case R_X86_64_GOTPCREL64:
2180 case R_X86_64_GOTPLT64:
2183 if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0)
2184 h->plt.refcount -= 1;
2185 if (h->got.refcount > 0)
2186 h->got.refcount -= 1;
2187 if (h->type == STT_GNU_IFUNC)
2189 if (h->plt.refcount > 0)
2190 h->plt.refcount -= 1;
2193 else if (local_got_refcounts != NULL)
2195 if (local_got_refcounts[r_symndx] > 0)
2196 local_got_refcounts[r_symndx] -= 1;
2208 case R_X86_64_PC32_BND:
2210 case R_X86_64_SIZE32:
2211 case R_X86_64_SIZE64:
2213 && (h == NULL || h->type != STT_GNU_IFUNC))
2217 case R_X86_64_PLT32:
2218 case R_X86_64_PLT32_BND:
2219 case R_X86_64_PLTOFF64:
2222 if (h->plt.refcount > 0)
2223 h->plt.refcount -= 1;
2235 /* Adjust a symbol defined by a dynamic object and referenced by a
2236 regular object. The current definition is in some section of the
2237 dynamic object, but we're not including those sections. We have to
2238 change the definition to something the rest of the link can
2242 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2243 struct elf_link_hash_entry *h)
2245 struct elf_x86_64_link_hash_table *htab;
2247 struct elf_x86_64_link_hash_entry *eh;
2248 struct elf_dyn_relocs *p;
2250 /* STT_GNU_IFUNC symbol must go through PLT. */
2251 if (h->type == STT_GNU_IFUNC)
2253 /* All local STT_GNU_IFUNC references must be treate as local
2254 calls via local PLT. */
2256 && SYMBOL_CALLS_LOCAL (info, h))
2258 bfd_size_type pc_count = 0, count = 0;
2259 struct elf_dyn_relocs **pp;
2261 eh = (struct elf_x86_64_link_hash_entry *) h;
2262 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2264 pc_count += p->pc_count;
2265 p->count -= p->pc_count;
2274 if (pc_count || count)
2278 if (h->plt.refcount <= 0)
2279 h->plt.refcount = 1;
2281 h->plt.refcount += 1;
2285 if (h->plt.refcount <= 0)
2287 h->plt.offset = (bfd_vma) -1;
2293 /* If this is a function, put it in the procedure linkage table. We
2294 will fill in the contents of the procedure linkage table later,
2295 when we know the address of the .got section. */
2296 if (h->type == STT_FUNC
2299 if (h->plt.refcount <= 0
2300 || SYMBOL_CALLS_LOCAL (info, h)
2301 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2302 && h->root.type == bfd_link_hash_undefweak))
2304 /* This case can occur if we saw a PLT32 reloc in an input
2305 file, but the symbol was never referred to by a dynamic
2306 object, or if all references were garbage collected. In
2307 such a case, we don't actually need to build a procedure
2308 linkage table, and we can just do a PC32 reloc instead. */
2309 h->plt.offset = (bfd_vma) -1;
2316 /* It's possible that we incorrectly decided a .plt reloc was
2317 needed for an R_X86_64_PC32 reloc to a non-function sym in
2318 check_relocs. We can't decide accurately between function and
2319 non-function syms in check-relocs; Objects loaded later in
2320 the link may change h->type. So fix it now. */
2321 h->plt.offset = (bfd_vma) -1;
2323 /* If this is a weak symbol, and there is a real definition, the
2324 processor independent code will have arranged for us to see the
2325 real definition first, and we can just use the same value. */
2326 if (h->u.weakdef != NULL)
2328 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2329 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2330 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2331 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2332 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2333 h->non_got_ref = h->u.weakdef->non_got_ref;
2337 /* This is a reference to a symbol defined by a dynamic object which
2338 is not a function. */
2340 /* If we are creating a shared library, we must presume that the
2341 only references to the symbol are via the global offset table.
2342 For such cases we need not do anything here; the relocations will
2343 be handled correctly by relocate_section. */
2347 /* If there are no references to this symbol that do not use the
2348 GOT, we don't need to generate a copy reloc. */
2349 if (!h->non_got_ref)
2352 /* If -z nocopyreloc was given, we won't generate them either. */
2353 if (info->nocopyreloc)
2359 if (ELIMINATE_COPY_RELOCS)
2361 eh = (struct elf_x86_64_link_hash_entry *) h;
2362 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2364 s = p->sec->output_section;
2365 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2369 /* If we didn't find any dynamic relocs in read-only sections, then
2370 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2378 /* We must allocate the symbol in our .dynbss section, which will
2379 become part of the .bss section of the executable. There will be
2380 an entry for this symbol in the .dynsym section. The dynamic
2381 object will contain position independent code, so all references
2382 from the dynamic object to this symbol will go through the global
2383 offset table. The dynamic linker will use the .dynsym entry to
2384 determine the address it must put in the global offset table, so
2385 both the dynamic object and the regular object will refer to the
2386 same memory location for the variable. */
2388 htab = elf_x86_64_hash_table (info);
2392 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2393 to copy the initial value out of the dynamic object and into the
2394 runtime process image. */
2395 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2397 const struct elf_backend_data *bed;
2398 bed = get_elf_backend_data (info->output_bfd);
2399 htab->srelbss->size += bed->s->sizeof_rela;
2405 return _bfd_elf_adjust_dynamic_copy (h, s);
2408 /* Allocate space in .plt, .got and associated reloc sections for
2412 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2414 struct bfd_link_info *info;
2415 struct elf_x86_64_link_hash_table *htab;
2416 struct elf_x86_64_link_hash_entry *eh;
2417 struct elf_dyn_relocs *p;
2418 const struct elf_backend_data *bed;
2419 unsigned int plt_entry_size;
2421 if (h->root.type == bfd_link_hash_indirect)
2424 eh = (struct elf_x86_64_link_hash_entry *) h;
2426 info = (struct bfd_link_info *) inf;
2427 htab = elf_x86_64_hash_table (info);
2430 bed = get_elf_backend_data (info->output_bfd);
2431 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2433 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2434 here if it is defined and referenced in a non-shared object. */
2435 if (h->type == STT_GNU_IFUNC
2438 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2444 asection *s = htab->plt_bnd;
2445 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2447 /* Use the .plt.bnd section if it is created. */
2448 eh->plt_bnd.offset = s->size;
2450 /* Make room for this entry in the .plt.bnd section. */
2451 s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2459 else if (htab->elf.dynamic_sections_created
2460 && h->plt.refcount > 0)
2462 /* Make sure this symbol is output as a dynamic symbol.
2463 Undefined weak syms won't yet be marked as dynamic. */
2464 if (h->dynindx == -1
2465 && !h->forced_local)
2467 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2472 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2474 asection *s = htab->elf.splt;
2475 asection *bnd_s = htab->plt_bnd;
2477 /* If this is the first .plt entry, make room for the special
2480 s->size = plt_entry_size;
2482 h->plt.offset = s->size;
2484 eh->plt_bnd.offset = bnd_s->size;
2486 /* If this symbol is not defined in a regular file, and we are
2487 not generating a shared library, then set the symbol to this
2488 location in the .plt. This is required to make function
2489 pointers compare as equal between the normal executable and
2490 the shared library. */
2496 /* We need to make a call to the entry of the second
2497 PLT instead of regular PLT entry. */
2498 h->root.u.def.section = bnd_s;
2499 h->root.u.def.value = eh->plt_bnd.offset;
2503 h->root.u.def.section = s;
2504 h->root.u.def.value = h->plt.offset;
2508 /* Make room for this entry. */
2509 s->size += plt_entry_size;
2512 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt2_entry)
2513 == sizeof (elf_x86_64_legacy_plt2_entry));
2514 bnd_s->size += sizeof (elf_x86_64_legacy_plt2_entry);
2517 /* We also need to make an entry in the .got.plt section, which
2518 will be placed in the .got section by the linker script. */
2519 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
2521 /* We also need to make an entry in the .rela.plt section. */
2522 htab->elf.srelplt->size += bed->s->sizeof_rela;
2523 htab->elf.srelplt->reloc_count++;
2527 h->plt.offset = (bfd_vma) -1;
2533 h->plt.offset = (bfd_vma) -1;
2537 eh->tlsdesc_got = (bfd_vma) -1;
2539 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2540 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2541 if (h->got.refcount > 0
2544 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
2546 h->got.offset = (bfd_vma) -1;
2548 else if (h->got.refcount > 0)
2552 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
2554 /* Make sure this symbol is output as a dynamic symbol.
2555 Undefined weak syms won't yet be marked as dynamic. */
2556 if (h->dynindx == -1
2557 && !h->forced_local)
2559 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2563 if (GOT_TLS_GDESC_P (tls_type))
2565 eh->tlsdesc_got = htab->elf.sgotplt->size
2566 - elf_x86_64_compute_jump_table_size (htab);
2567 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
2568 h->got.offset = (bfd_vma) -2;
2570 if (! GOT_TLS_GDESC_P (tls_type)
2571 || GOT_TLS_GD_P (tls_type))
2574 h->got.offset = s->size;
2575 s->size += GOT_ENTRY_SIZE;
2576 if (GOT_TLS_GD_P (tls_type))
2577 s->size += GOT_ENTRY_SIZE;
2579 dyn = htab->elf.dynamic_sections_created;
2580 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2582 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2583 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2584 || tls_type == GOT_TLS_IE)
2585 htab->elf.srelgot->size += bed->s->sizeof_rela;
2586 else if (GOT_TLS_GD_P (tls_type))
2587 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
2588 else if (! GOT_TLS_GDESC_P (tls_type)
2589 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2590 || h->root.type != bfd_link_hash_undefweak)
2592 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2593 htab->elf.srelgot->size += bed->s->sizeof_rela;
2594 if (GOT_TLS_GDESC_P (tls_type))
2596 htab->elf.srelplt->size += bed->s->sizeof_rela;
2597 htab->tlsdesc_plt = (bfd_vma) -1;
2601 h->got.offset = (bfd_vma) -1;
2603 if (eh->dyn_relocs == NULL)
2606 /* In the shared -Bsymbolic case, discard space allocated for
2607 dynamic pc-relative relocs against symbols which turn out to be
2608 defined in regular objects. For the normal shared case, discard
2609 space for pc-relative relocs that have become local due to symbol
2610 visibility changes. */
2614 /* Relocs that use pc_count are those that appear on a call
2615 insn, or certain REL relocs that can generated via assembly.
2616 We want calls to protected symbols to resolve directly to the
2617 function rather than going via the plt. If people want
2618 function pointer comparisons to work as expected then they
2619 should avoid writing weird assembly. */
2620 if (SYMBOL_CALLS_LOCAL (info, h))
2622 struct elf_dyn_relocs **pp;
2624 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2626 p->count -= p->pc_count;
2635 /* Also discard relocs on undefined weak syms with non-default
2637 if (eh->dyn_relocs != NULL
2638 && h->root.type == bfd_link_hash_undefweak)
2640 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2641 eh->dyn_relocs = NULL;
2643 /* Make sure undefined weak symbols are output as a dynamic
2645 else if (h->dynindx == -1
2646 && ! h->forced_local
2647 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2652 else if (ELIMINATE_COPY_RELOCS)
2654 /* For the non-shared case, discard space for relocs against
2655 symbols which turn out to need copy relocs or are not
2661 || (htab->elf.dynamic_sections_created
2662 && (h->root.type == bfd_link_hash_undefweak
2663 || h->root.type == bfd_link_hash_undefined))))
2665 /* Make sure this symbol is output as a dynamic symbol.
2666 Undefined weak syms won't yet be marked as dynamic. */
2667 if (h->dynindx == -1
2668 && ! h->forced_local
2669 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2672 /* If that succeeded, we know we'll be keeping all the
2674 if (h->dynindx != -1)
2678 eh->dyn_relocs = NULL;
2683 /* Finally, allocate space. */
2684 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2688 sreloc = elf_section_data (p->sec)->sreloc;
2690 BFD_ASSERT (sreloc != NULL);
2692 sreloc->size += p->count * bed->s->sizeof_rela;
2698 /* Allocate space in .plt, .got and associated reloc sections for
2699 local dynamic relocs. */
2702 elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
2704 struct elf_link_hash_entry *h
2705 = (struct elf_link_hash_entry *) *slot;
2707 if (h->type != STT_GNU_IFUNC
2711 || h->root.type != bfd_link_hash_defined)
2714 return elf_x86_64_allocate_dynrelocs (h, inf);
2717 /* Find any dynamic relocs that apply to read-only sections. */
2720 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2723 struct elf_x86_64_link_hash_entry *eh;
2724 struct elf_dyn_relocs *p;
2726 /* Skip local IFUNC symbols. */
2727 if (h->forced_local && h->type == STT_GNU_IFUNC)
2730 eh = (struct elf_x86_64_link_hash_entry *) h;
2731 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2733 asection *s = p->sec->output_section;
2735 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2737 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2739 info->flags |= DF_TEXTREL;
2741 if (info->warn_shared_textrel && info->shared)
2742 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2743 p->sec->owner, h->root.root.string,
2746 /* Not an error, just cut short the traversal. */
2754 mov foo@GOTPCREL(%rip), %reg
2757 with the local symbol, foo. */
2760 elf_x86_64_convert_mov_to_lea (bfd *abfd, asection *sec,
2761 struct bfd_link_info *link_info)
2763 Elf_Internal_Shdr *symtab_hdr;
2764 Elf_Internal_Rela *internal_relocs;
2765 Elf_Internal_Rela *irel, *irelend;
2767 struct elf_x86_64_link_hash_table *htab;
2768 bfd_boolean changed_contents;
2769 bfd_boolean changed_relocs;
2770 bfd_signed_vma *local_got_refcounts;
2772 /* Don't even try to convert non-ELF outputs. */
2773 if (!is_elf_hash_table (link_info->hash))
2776 /* Nothing to do if there are no codes, no relocations or no output. */
2777 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2778 || sec->reloc_count == 0
2779 || discarded_section (sec))
2782 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2784 /* Load the relocations for this section. */
2785 internal_relocs = (_bfd_elf_link_read_relocs
2786 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2787 link_info->keep_memory));
2788 if (internal_relocs == NULL)
2791 htab = elf_x86_64_hash_table (link_info);
2792 changed_contents = FALSE;
2793 changed_relocs = FALSE;
2794 local_got_refcounts = elf_local_got_refcounts (abfd);
2796 /* Get the section contents. */
2797 if (elf_section_data (sec)->this_hdr.contents != NULL)
2798 contents = elf_section_data (sec)->this_hdr.contents;
2801 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2805 irelend = internal_relocs + sec->reloc_count;
2806 for (irel = internal_relocs; irel < irelend; irel++)
2808 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2809 unsigned int r_symndx = htab->r_sym (irel->r_info);
2811 struct elf_link_hash_entry *h;
2813 if (r_type != R_X86_64_GOTPCREL)
2816 /* Get the symbol referred to by the reloc. */
2817 if (r_symndx < symtab_hdr->sh_info)
2819 Elf_Internal_Sym *isym;
2821 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2824 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. */
2825 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2826 && bfd_get_8 (input_bfd,
2827 contents + irel->r_offset - 2) == 0x8b)
2829 bfd_put_8 (output_bfd, 0x8d,
2830 contents + irel->r_offset - 2);
2831 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2832 if (local_got_refcounts != NULL
2833 && local_got_refcounts[r_symndx] > 0)
2834 local_got_refcounts[r_symndx] -= 1;
2835 changed_contents = TRUE;
2836 changed_relocs = TRUE;
2841 indx = r_symndx - symtab_hdr->sh_info;
2842 h = elf_sym_hashes (abfd)[indx];
2843 BFD_ASSERT (h != NULL);
2845 while (h->root.type == bfd_link_hash_indirect
2846 || h->root.type == bfd_link_hash_warning)
2847 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2849 /* STT_GNU_IFUNC must keep R_X86_64_GOTPCREL relocation. We also
2850 avoid optimizing _DYNAMIC since ld.so may use its link-time
2853 && h->type != STT_GNU_IFUNC
2854 && h != htab->elf.hdynamic
2855 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2856 && bfd_get_8 (input_bfd,
2857 contents + irel->r_offset - 2) == 0x8b)
2859 bfd_put_8 (output_bfd, 0x8d,
2860 contents + irel->r_offset - 2);
2861 irel->r_info = htab->r_info (r_symndx, R_X86_64_PC32);
2862 if (h->got.refcount > 0)
2863 h->got.refcount -= 1;
2864 changed_contents = TRUE;
2865 changed_relocs = TRUE;
2869 if (contents != NULL
2870 && elf_section_data (sec)->this_hdr.contents != contents)
2872 if (!changed_contents && !link_info->keep_memory)
2876 /* Cache the section contents for elf_link_input_bfd. */
2877 elf_section_data (sec)->this_hdr.contents = contents;
2881 if (elf_section_data (sec)->relocs != internal_relocs)
2883 if (!changed_relocs)
2884 free (internal_relocs);
2886 elf_section_data (sec)->relocs = internal_relocs;
2892 if (contents != NULL
2893 && elf_section_data (sec)->this_hdr.contents != contents)
2895 if (internal_relocs != NULL
2896 && elf_section_data (sec)->relocs != internal_relocs)
2897 free (internal_relocs);
2901 /* Set the sizes of the dynamic sections. */
2904 elf_x86_64_size_dynamic_sections (bfd *output_bfd,
2905 struct bfd_link_info *info)
2907 struct elf_x86_64_link_hash_table *htab;
2912 const struct elf_backend_data *bed;
2914 htab = elf_x86_64_hash_table (info);
2917 bed = get_elf_backend_data (output_bfd);
2919 dynobj = htab->elf.dynobj;
2923 if (htab->elf.dynamic_sections_created)
2925 /* Set the contents of the .interp section to the interpreter. */
2926 if (info->executable)
2928 s = bfd_get_linker_section (dynobj, ".interp");
2931 s->size = htab->dynamic_interpreter_size;
2932 s->contents = (unsigned char *) htab->dynamic_interpreter;
2936 /* Set up .got offsets for local syms, and space for local dynamic
2938 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2940 bfd_signed_vma *local_got;
2941 bfd_signed_vma *end_local_got;
2942 char *local_tls_type;
2943 bfd_vma *local_tlsdesc_gotent;
2944 bfd_size_type locsymcount;
2945 Elf_Internal_Shdr *symtab_hdr;
2948 if (! is_x86_64_elf (ibfd))
2951 for (s = ibfd->sections; s != NULL; s = s->next)
2953 struct elf_dyn_relocs *p;
2955 if (!elf_x86_64_convert_mov_to_lea (ibfd, s, info))
2958 for (p = (struct elf_dyn_relocs *)
2959 (elf_section_data (s)->local_dynrel);
2963 if (!bfd_is_abs_section (p->sec)
2964 && bfd_is_abs_section (p->sec->output_section))
2966 /* Input section has been discarded, either because
2967 it is a copy of a linkonce section or due to
2968 linker script /DISCARD/, so we'll be discarding
2971 else if (p->count != 0)
2973 srel = elf_section_data (p->sec)->sreloc;
2974 srel->size += p->count * bed->s->sizeof_rela;
2975 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2976 && (info->flags & DF_TEXTREL) == 0)
2978 info->flags |= DF_TEXTREL;
2979 if (info->warn_shared_textrel && info->shared)
2980 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2981 p->sec->owner, p->sec);
2987 local_got = elf_local_got_refcounts (ibfd);
2991 symtab_hdr = &elf_symtab_hdr (ibfd);
2992 locsymcount = symtab_hdr->sh_info;
2993 end_local_got = local_got + locsymcount;
2994 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
2995 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
2997 srel = htab->elf.srelgot;
2998 for (; local_got < end_local_got;
2999 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3001 *local_tlsdesc_gotent = (bfd_vma) -1;
3004 if (GOT_TLS_GDESC_P (*local_tls_type))
3006 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3007 - elf_x86_64_compute_jump_table_size (htab);
3008 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3009 *local_got = (bfd_vma) -2;
3011 if (! GOT_TLS_GDESC_P (*local_tls_type)
3012 || GOT_TLS_GD_P (*local_tls_type))
3014 *local_got = s->size;
3015 s->size += GOT_ENTRY_SIZE;
3016 if (GOT_TLS_GD_P (*local_tls_type))
3017 s->size += GOT_ENTRY_SIZE;
3020 || GOT_TLS_GD_ANY_P (*local_tls_type)
3021 || *local_tls_type == GOT_TLS_IE)
3023 if (GOT_TLS_GDESC_P (*local_tls_type))
3025 htab->elf.srelplt->size
3026 += bed->s->sizeof_rela;
3027 htab->tlsdesc_plt = (bfd_vma) -1;
3029 if (! GOT_TLS_GDESC_P (*local_tls_type)
3030 || GOT_TLS_GD_P (*local_tls_type))
3031 srel->size += bed->s->sizeof_rela;
3035 *local_got = (bfd_vma) -1;
3039 if (htab->tls_ld_got.refcount > 0)
3041 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3043 htab->tls_ld_got.offset = htab->elf.sgot->size;
3044 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
3045 htab->elf.srelgot->size += bed->s->sizeof_rela;
3048 htab->tls_ld_got.offset = -1;
3050 /* Allocate global sym .plt and .got entries, and space for global
3051 sym dynamic relocs. */
3052 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
3055 /* Allocate .plt and .got entries, and space for local symbols. */
3056 htab_traverse (htab->loc_hash_table,
3057 elf_x86_64_allocate_local_dynrelocs,
3060 /* For every jump slot reserved in the sgotplt, reloc_count is
3061 incremented. However, when we reserve space for TLS descriptors,
3062 it's not incremented, so in order to compute the space reserved
3063 for them, it suffices to multiply the reloc count by the jump
3066 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3067 so that R_X86_64_IRELATIVE entries come last. */
3068 if (htab->elf.srelplt)
3070 htab->sgotplt_jump_table_size
3071 = elf_x86_64_compute_jump_table_size (htab);
3072 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3074 else if (htab->elf.irelplt)
3075 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3077 if (htab->tlsdesc_plt)
3079 /* If we're not using lazy TLS relocations, don't generate the
3080 PLT and GOT entries they require. */
3081 if ((info->flags & DF_BIND_NOW))
3082 htab->tlsdesc_plt = 0;
3085 htab->tlsdesc_got = htab->elf.sgot->size;
3086 htab->elf.sgot->size += GOT_ENTRY_SIZE;
3087 /* Reserve room for the initial entry.
3088 FIXME: we could probably do away with it in this case. */
3089 if (htab->elf.splt->size == 0)
3090 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
3091 htab->tlsdesc_plt = htab->elf.splt->size;
3092 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
3096 if (htab->elf.sgotplt)
3098 /* Don't allocate .got.plt section if there are no GOT nor PLT
3099 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3100 if ((htab->elf.hgot == NULL
3101 || !htab->elf.hgot->ref_regular_nonweak)
3102 && (htab->elf.sgotplt->size
3103 == get_elf_backend_data (output_bfd)->got_header_size)
3104 && (htab->elf.splt == NULL
3105 || htab->elf.splt->size == 0)
3106 && (htab->elf.sgot == NULL
3107 || htab->elf.sgot->size == 0)
3108 && (htab->elf.iplt == NULL
3109 || htab->elf.iplt->size == 0)
3110 && (htab->elf.igotplt == NULL
3111 || htab->elf.igotplt->size == 0))
3112 htab->elf.sgotplt->size = 0;
3115 if (htab->plt_eh_frame != NULL
3116 && htab->elf.splt != NULL
3117 && htab->elf.splt->size != 0
3118 && !bfd_is_abs_section (htab->elf.splt->output_section)
3119 && _bfd_elf_eh_frame_present (info))
3121 const struct elf_x86_64_backend_data *arch_data
3122 = get_elf_x86_64_arch_data (bed);
3123 htab->plt_eh_frame->size = arch_data->eh_frame_plt_size;
3126 /* We now have determined the sizes of the various dynamic sections.
3127 Allocate memory for them. */
3129 for (s = dynobj->sections; s != NULL; s = s->next)
3131 if ((s->flags & SEC_LINKER_CREATED) == 0)
3134 if (s == htab->elf.splt
3135 || s == htab->elf.sgot
3136 || s == htab->elf.sgotplt
3137 || s == htab->elf.iplt
3138 || s == htab->elf.igotplt
3139 || s == htab->plt_bnd
3140 || s == htab->plt_eh_frame
3141 || s == htab->sdynbss)
3143 /* Strip this section if we don't need it; see the
3146 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
3148 if (s->size != 0 && s != htab->elf.srelplt)
3151 /* We use the reloc_count field as a counter if we need
3152 to copy relocs into the output file. */
3153 if (s != htab->elf.srelplt)
3158 /* It's not one of our sections, so don't allocate space. */
3164 /* If we don't need this section, strip it from the
3165 output file. This is mostly to handle .rela.bss and
3166 .rela.plt. We must create both sections in
3167 create_dynamic_sections, because they must be created
3168 before the linker maps input sections to output
3169 sections. The linker does that before
3170 adjust_dynamic_symbol is called, and it is that
3171 function which decides whether anything needs to go
3172 into these sections. */
3174 s->flags |= SEC_EXCLUDE;
3178 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3181 /* Allocate memory for the section contents. We use bfd_zalloc
3182 here in case unused entries are not reclaimed before the
3183 section's contents are written out. This should not happen,
3184 but this way if it does, we get a R_X86_64_NONE reloc instead
3186 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3187 if (s->contents == NULL)
3191 if (htab->plt_eh_frame != NULL
3192 && htab->plt_eh_frame->contents != NULL)
3194 const struct elf_x86_64_backend_data *arch_data
3195 = get_elf_x86_64_arch_data (bed);
3197 memcpy (htab->plt_eh_frame->contents,
3198 arch_data->eh_frame_plt, htab->plt_eh_frame->size);
3199 bfd_put_32 (dynobj, htab->elf.splt->size,
3200 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3203 if (htab->elf.dynamic_sections_created)
3205 /* Add some entries to the .dynamic section. We fill in the
3206 values later, in elf_x86_64_finish_dynamic_sections, but we
3207 must add the entries now so that we get the correct size for
3208 the .dynamic section. The DT_DEBUG entry is filled in by the
3209 dynamic linker and used by the debugger. */
3210 #define add_dynamic_entry(TAG, VAL) \
3211 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3213 if (info->executable)
3215 if (!add_dynamic_entry (DT_DEBUG, 0))
3219 if (htab->elf.splt->size != 0)
3221 if (!add_dynamic_entry (DT_PLTGOT, 0)
3222 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3223 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3224 || !add_dynamic_entry (DT_JMPREL, 0))
3227 if (htab->tlsdesc_plt
3228 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3229 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3235 if (!add_dynamic_entry (DT_RELA, 0)
3236 || !add_dynamic_entry (DT_RELASZ, 0)
3237 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
3240 /* If any dynamic relocs apply to a read-only section,
3241 then we need a DT_TEXTREL entry. */
3242 if ((info->flags & DF_TEXTREL) == 0)
3243 elf_link_hash_traverse (&htab->elf,
3244 elf_x86_64_readonly_dynrelocs,
3247 if ((info->flags & DF_TEXTREL) != 0)
3249 if (!add_dynamic_entry (DT_TEXTREL, 0))
3254 #undef add_dynamic_entry
3260 elf_x86_64_always_size_sections (bfd *output_bfd,
3261 struct bfd_link_info *info)
3263 asection *tls_sec = elf_hash_table (info)->tls_sec;
3267 struct elf_link_hash_entry *tlsbase;
3269 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3270 "_TLS_MODULE_BASE_",
3271 FALSE, FALSE, FALSE);
3273 if (tlsbase && tlsbase->type == STT_TLS)
3275 struct elf_x86_64_link_hash_table *htab;
3276 struct bfd_link_hash_entry *bh = NULL;
3277 const struct elf_backend_data *bed
3278 = get_elf_backend_data (output_bfd);
3280 htab = elf_x86_64_hash_table (info);
3284 if (!(_bfd_generic_link_add_one_symbol
3285 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3286 tls_sec, 0, NULL, FALSE,
3287 bed->collect, &bh)))
3290 htab->tls_module_base = bh;
3292 tlsbase = (struct elf_link_hash_entry *)bh;
3293 tlsbase->def_regular = 1;
3294 tlsbase->other = STV_HIDDEN;
3295 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3302 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3303 executables. Rather than setting it to the beginning of the TLS
3304 section, we have to set it to the end. This function may be called
3305 multiple times, it is idempotent. */
3308 elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
3310 struct elf_x86_64_link_hash_table *htab;
3311 struct bfd_link_hash_entry *base;
3313 if (!info->executable)
3316 htab = elf_x86_64_hash_table (info);
3320 base = htab->tls_module_base;
3324 base->u.def.value = htab->elf.tls_size;
3327 /* Return the base VMA address which should be subtracted from real addresses
3328 when resolving @dtpoff relocation.
3329 This is PT_TLS segment p_vaddr. */
3332 elf_x86_64_dtpoff_base (struct bfd_link_info *info)
3334 /* If tls_sec is NULL, we should have signalled an error already. */
3335 if (elf_hash_table (info)->tls_sec == NULL)
3337 return elf_hash_table (info)->tls_sec->vma;
3340 /* Return the relocation value for @tpoff relocation
3341 if STT_TLS virtual address is ADDRESS. */
3344 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
3346 struct elf_link_hash_table *htab = elf_hash_table (info);
3347 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3348 bfd_vma static_tls_size;
3350 /* If tls_segment is NULL, we should have signalled an error already. */
3351 if (htab->tls_sec == NULL)
3354 /* Consider special static TLS alignment requirements. */
3355 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3356 return address - static_tls_size - htab->tls_sec->vma;
3359 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3363 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3365 /* Opcode Instruction
3368 0x0f 0x8x conditional jump */
3370 && (contents [offset - 1] == 0xe8
3371 || contents [offset - 1] == 0xe9))
3373 && contents [offset - 2] == 0x0f
3374 && (contents [offset - 1] & 0xf0) == 0x80));
3377 /* Relocate an x86_64 ELF section. */
3380 elf_x86_64_relocate_section (bfd *output_bfd,
3381 struct bfd_link_info *info,
3383 asection *input_section,
3385 Elf_Internal_Rela *relocs,
3386 Elf_Internal_Sym *local_syms,
3387 asection **local_sections)
3389 struct elf_x86_64_link_hash_table *htab;
3390 Elf_Internal_Shdr *symtab_hdr;
3391 struct elf_link_hash_entry **sym_hashes;
3392 bfd_vma *local_got_offsets;
3393 bfd_vma *local_tlsdesc_gotents;
3394 Elf_Internal_Rela *rel;
3395 Elf_Internal_Rela *relend;
3396 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
3398 BFD_ASSERT (is_x86_64_elf (input_bfd));
3400 htab = elf_x86_64_hash_table (info);
3403 symtab_hdr = &elf_symtab_hdr (input_bfd);
3404 sym_hashes = elf_sym_hashes (input_bfd);
3405 local_got_offsets = elf_local_got_offsets (input_bfd);
3406 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
3408 elf_x86_64_set_tls_module_base (info);
3411 relend = relocs + input_section->reloc_count;
3412 for (; rel < relend; rel++)
3414 unsigned int r_type;
3415 reloc_howto_type *howto;
3416 unsigned long r_symndx;
3417 struct elf_link_hash_entry *h;
3418 struct elf_x86_64_link_hash_entry *eh;
3419 Elf_Internal_Sym *sym;
3421 bfd_vma off, offplt, plt_offset;
3423 bfd_boolean unresolved_reloc;
3424 bfd_reloc_status_type r;
3426 asection *base_got, *resolved_plt;
3429 r_type = ELF32_R_TYPE (rel->r_info);
3430 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3431 || r_type == (int) R_X86_64_GNU_VTENTRY)
3434 if (r_type >= (int) R_X86_64_standard)
3436 (*_bfd_error_handler)
3437 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3438 input_bfd, input_section, r_type);
3439 bfd_set_error (bfd_error_bad_value);
3443 if (r_type != (int) R_X86_64_32
3444 || ABI_64_P (output_bfd))
3445 howto = x86_64_elf_howto_table + r_type;
3447 howto = (x86_64_elf_howto_table
3448 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
3449 r_symndx = htab->r_sym (rel->r_info);
3453 unresolved_reloc = FALSE;
3454 if (r_symndx < symtab_hdr->sh_info)
3456 sym = local_syms + r_symndx;
3457 sec = local_sections[r_symndx];
3459 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3461 st_size = sym->st_size;
3463 /* Relocate against local STT_GNU_IFUNC symbol. */
3464 if (!info->relocatable
3465 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3467 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
3472 /* Set STT_GNU_IFUNC symbol value. */
3473 h->root.u.def.value = sym->st_value;
3474 h->root.u.def.section = sec;
3479 bfd_boolean warned ATTRIBUTE_UNUSED;
3480 bfd_boolean ignored ATTRIBUTE_UNUSED;
3482 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3483 r_symndx, symtab_hdr, sym_hashes,
3485 unresolved_reloc, warned, ignored);
3489 if (sec != NULL && discarded_section (sec))
3490 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3491 rel, 1, relend, howto, 0, contents);
3493 if (info->relocatable)
3496 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
3498 if (r_type == R_X86_64_64)
3500 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3501 zero-extend it to 64bit if addend is zero. */
3502 r_type = R_X86_64_32;
3503 memset (contents + rel->r_offset + 4, 0, 4);
3505 else if (r_type == R_X86_64_SIZE64)
3507 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3508 zero-extend it to 64bit if addend is zero. */
3509 r_type = R_X86_64_SIZE32;
3510 memset (contents + rel->r_offset + 4, 0, 4);
3514 eh = (struct elf_x86_64_link_hash_entry *) h;
3516 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3517 it here if it is defined in a non-shared object. */
3519 && h->type == STT_GNU_IFUNC
3525 if ((input_section->flags & SEC_ALLOC) == 0
3526 || h->plt.offset == (bfd_vma) -1)
3529 /* STT_GNU_IFUNC symbol must go through PLT. */
3530 if (htab->elf.splt != NULL)
3532 if (htab->plt_bnd != NULL)
3534 resolved_plt = htab->plt_bnd;
3535 plt_offset = eh->plt_bnd.offset;
3539 resolved_plt = htab->elf.splt;
3540 plt_offset = h->plt.offset;
3545 resolved_plt = htab->elf.iplt;
3546 plt_offset = h->plt.offset;
3549 relocation = (resolved_plt->output_section->vma
3550 + resolved_plt->output_offset + plt_offset);
3555 if (h->root.root.string)
3556 name = h->root.root.string;
3558 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3560 (*_bfd_error_handler)
3561 (_("%B: relocation %s against STT_GNU_IFUNC "
3562 "symbol `%s' isn't handled by %s"), input_bfd,
3563 x86_64_elf_howto_table[r_type].name,
3564 name, __FUNCTION__);
3565 bfd_set_error (bfd_error_bad_value);
3574 if (ABI_64_P (output_bfd))
3578 if (rel->r_addend != 0)
3580 if (h->root.root.string)
3581 name = h->root.root.string;
3583 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3585 (*_bfd_error_handler)
3586 (_("%B: relocation %s against STT_GNU_IFUNC "
3587 "symbol `%s' has non-zero addend: %d"),
3588 input_bfd, x86_64_elf_howto_table[r_type].name,
3589 name, rel->r_addend);
3590 bfd_set_error (bfd_error_bad_value);
3594 /* Generate dynamic relcoation only when there is a
3595 non-GOT reference in a shared object. */
3596 if (info->shared && h->non_got_ref)
3598 Elf_Internal_Rela outrel;
3601 /* Need a dynamic relocation to get the real function
3603 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
3607 if (outrel.r_offset == (bfd_vma) -1
3608 || outrel.r_offset == (bfd_vma) -2)
3611 outrel.r_offset += (input_section->output_section->vma
3612 + input_section->output_offset);
3614 if (h->dynindx == -1
3616 || info->executable)
3618 /* This symbol is resolved locally. */
3619 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
3620 outrel.r_addend = (h->root.u.def.value
3621 + h->root.u.def.section->output_section->vma
3622 + h->root.u.def.section->output_offset);
3626 outrel.r_info = htab->r_info (h->dynindx, r_type);
3627 outrel.r_addend = 0;
3630 sreloc = htab->elf.irelifunc;
3631 elf_append_rela (output_bfd, sreloc, &outrel);
3633 /* If this reloc is against an external symbol, we
3634 do not want to fiddle with the addend. Otherwise,
3635 we need to include the symbol value so that it
3636 becomes an addend for the dynamic reloc. For an
3637 internal symbol, we have updated addend. */
3642 case R_X86_64_PC32_BND:
3644 case R_X86_64_PLT32:
3645 case R_X86_64_PLT32_BND:
3648 case R_X86_64_GOTPCREL:
3649 case R_X86_64_GOTPCREL64:
3650 base_got = htab->elf.sgot;
3651 off = h->got.offset;
3653 if (base_got == NULL)
3656 if (off == (bfd_vma) -1)
3658 /* We can't use h->got.offset here to save state, or
3659 even just remember the offset, as finish_dynamic_symbol
3660 would use that as offset into .got. */
3662 if (htab->elf.splt != NULL)
3664 plt_index = h->plt.offset / plt_entry_size - 1;
3665 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3666 base_got = htab->elf.sgotplt;
3670 plt_index = h->plt.offset / plt_entry_size;
3671 off = plt_index * GOT_ENTRY_SIZE;
3672 base_got = htab->elf.igotplt;
3675 if (h->dynindx == -1
3679 /* This references the local defitionion. We must
3680 initialize this entry in the global offset table.
3681 Since the offset must always be a multiple of 8,
3682 we use the least significant bit to record
3683 whether we have initialized it already.
3685 When doing a dynamic link, we create a .rela.got
3686 relocation entry to initialize the value. This
3687 is done in the finish_dynamic_symbol routine. */
3692 bfd_put_64 (output_bfd, relocation,
3693 base_got->contents + off);
3694 /* Note that this is harmless for the GOTPLT64
3695 case, as -1 | 1 still is -1. */
3701 relocation = (base_got->output_section->vma
3702 + base_got->output_offset + off);
3708 /* When generating a shared object, the relocations handled here are
3709 copied into the output file to be resolved at run time. */
3712 case R_X86_64_GOT32:
3713 case R_X86_64_GOT64:
3714 /* Relocation is to the entry for this symbol in the global
3716 case R_X86_64_GOTPCREL:
3717 case R_X86_64_GOTPCREL64:
3718 /* Use global offset table entry as symbol value. */
3719 case R_X86_64_GOTPLT64:
3720 /* This is the same as GOT64 for relocation purposes, but
3721 indicates the existence of a PLT entry. The difficulty is,
3722 that we must calculate the GOT slot offset from the PLT
3723 offset, if this symbol got a PLT entry (it was global).
3724 Additionally if it's computed from the PLT entry, then that
3725 GOT offset is relative to .got.plt, not to .got. */
3726 base_got = htab->elf.sgot;
3728 if (htab->elf.sgot == NULL)
3735 off = h->got.offset;
3737 && h->plt.offset != (bfd_vma)-1
3738 && off == (bfd_vma)-1)
3740 /* We can't use h->got.offset here to save
3741 state, or even just remember the offset, as
3742 finish_dynamic_symbol would use that as offset into
3744 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
3745 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3746 base_got = htab->elf.sgotplt;
3749 dyn = htab->elf.dynamic_sections_created;
3751 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3753 && SYMBOL_REFERENCES_LOCAL (info, h))
3754 || (ELF_ST_VISIBILITY (h->other)
3755 && h->root.type == bfd_link_hash_undefweak))
3757 /* This is actually a static link, or it is a -Bsymbolic
3758 link and the symbol is defined locally, or the symbol
3759 was forced to be local because of a version file. We
3760 must initialize this entry in the global offset table.
3761 Since the offset must always be a multiple of 8, we
3762 use the least significant bit to record whether we
3763 have initialized it already.
3765 When doing a dynamic link, we create a .rela.got
3766 relocation entry to initialize the value. This is
3767 done in the finish_dynamic_symbol routine. */
3772 bfd_put_64 (output_bfd, relocation,
3773 base_got->contents + off);
3774 /* Note that this is harmless for the GOTPLT64 case,
3775 as -1 | 1 still is -1. */
3780 unresolved_reloc = FALSE;
3784 if (local_got_offsets == NULL)
3787 off = local_got_offsets[r_symndx];
3789 /* The offset must always be a multiple of 8. We use
3790 the least significant bit to record whether we have
3791 already generated the necessary reloc. */
3796 bfd_put_64 (output_bfd, relocation,
3797 base_got->contents + off);
3802 Elf_Internal_Rela outrel;
3804 /* We need to generate a R_X86_64_RELATIVE reloc
3805 for the dynamic linker. */
3806 s = htab->elf.srelgot;
3810 outrel.r_offset = (base_got->output_section->vma
3811 + base_got->output_offset
3813 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3814 outrel.r_addend = relocation;
3815 elf_append_rela (output_bfd, s, &outrel);
3818 local_got_offsets[r_symndx] |= 1;
3822 if (off >= (bfd_vma) -2)
3825 relocation = base_got->output_section->vma
3826 + base_got->output_offset + off;
3827 if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64)
3828 relocation -= htab->elf.sgotplt->output_section->vma
3829 - htab->elf.sgotplt->output_offset;
3833 case R_X86_64_GOTOFF64:
3834 /* Relocation is relative to the start of the global offset
3837 /* Check to make sure it isn't a protected function symbol
3838 for shared library since it may not be local when used
3839 as function address. */
3840 if (!info->executable
3842 && !SYMBOLIC_BIND (info, h)
3844 && h->type == STT_FUNC
3845 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3847 (*_bfd_error_handler)
3848 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3849 input_bfd, h->root.root.string);
3850 bfd_set_error (bfd_error_bad_value);
3854 /* Note that sgot is not involved in this
3855 calculation. We always want the start of .got.plt. If we
3856 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3857 permitted by the ABI, we might have to change this
3859 relocation -= htab->elf.sgotplt->output_section->vma
3860 + htab->elf.sgotplt->output_offset;
3863 case R_X86_64_GOTPC32:
3864 case R_X86_64_GOTPC64:
3865 /* Use global offset table as symbol value. */
3866 relocation = htab->elf.sgotplt->output_section->vma
3867 + htab->elf.sgotplt->output_offset;
3868 unresolved_reloc = FALSE;
3871 case R_X86_64_PLTOFF64:
3872 /* Relocation is PLT entry relative to GOT. For local
3873 symbols it's the symbol itself relative to GOT. */
3875 /* See PLT32 handling. */
3876 && h->plt.offset != (bfd_vma) -1
3877 && htab->elf.splt != NULL)
3879 if (htab->plt_bnd != NULL)
3881 resolved_plt = htab->plt_bnd;
3882 plt_offset = eh->plt_bnd.offset;
3886 resolved_plt = htab->elf.splt;
3887 plt_offset = h->plt.offset;
3890 relocation = (resolved_plt->output_section->vma
3891 + resolved_plt->output_offset
3893 unresolved_reloc = FALSE;
3896 relocation -= htab->elf.sgotplt->output_section->vma
3897 + htab->elf.sgotplt->output_offset;
3900 case R_X86_64_PLT32:
3901 case R_X86_64_PLT32_BND:
3902 /* Relocation is to the entry for this symbol in the
3903 procedure linkage table. */
3905 /* Resolve a PLT32 reloc against a local symbol directly,
3906 without using the procedure linkage table. */
3910 if (h->plt.offset == (bfd_vma) -1
3911 || htab->elf.splt == NULL)
3913 /* We didn't make a PLT entry for this symbol. This
3914 happens when statically linking PIC code, or when
3915 using -Bsymbolic. */
3919 if (htab->plt_bnd != NULL)
3921 resolved_plt = htab->plt_bnd;
3922 plt_offset = eh->plt_bnd.offset;
3926 resolved_plt = htab->elf.splt;
3927 plt_offset = h->plt.offset;
3930 relocation = (resolved_plt->output_section->vma
3931 + resolved_plt->output_offset
3933 unresolved_reloc = FALSE;
3936 case R_X86_64_SIZE32:
3937 case R_X86_64_SIZE64:
3938 /* Set to symbol size. */
3939 relocation = st_size;
3945 case R_X86_64_PC32_BND:
3947 && (input_section->flags & SEC_ALLOC) != 0
3948 && (input_section->flags & SEC_READONLY) != 0
3951 bfd_boolean fail = FALSE;
3953 = ((r_type == R_X86_64_PC32
3954 || r_type == R_X86_64_PC32_BND)
3955 && is_32bit_relative_branch (contents, rel->r_offset));
3957 if (SYMBOL_REFERENCES_LOCAL (info, h))
3959 /* Symbol is referenced locally. Make sure it is
3960 defined locally or for a branch. */
3961 fail = !h->def_regular && !branch;
3965 /* Symbol isn't referenced locally. We only allow
3966 branch to symbol with non-default visibility. */
3968 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
3975 const char *pic = "";
3977 switch (ELF_ST_VISIBILITY (h->other))
3980 v = _("hidden symbol");
3983 v = _("internal symbol");
3986 v = _("protected symbol");
3990 pic = _("; recompile with -fPIC");
3995 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3997 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3999 (*_bfd_error_handler) (fmt, input_bfd,
4000 x86_64_elf_howto_table[r_type].name,
4001 v, h->root.root.string, pic);
4002 bfd_set_error (bfd_error_bad_value);
4013 /* FIXME: The ABI says the linker should make sure the value is
4014 the same when it's zeroextended to 64 bit. */
4017 if ((input_section->flags & SEC_ALLOC) == 0)
4022 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4023 || h->root.type != bfd_link_hash_undefweak)
4024 && ((! IS_X86_64_PCREL_TYPE (r_type)
4025 && r_type != R_X86_64_SIZE32
4026 && r_type != R_X86_64_SIZE64)
4027 || ! SYMBOL_CALLS_LOCAL (info, h)))
4028 || (ELIMINATE_COPY_RELOCS
4035 || h->root.type == bfd_link_hash_undefweak
4036 || h->root.type == bfd_link_hash_undefined)))
4038 Elf_Internal_Rela outrel;
4039 bfd_boolean skip, relocate;
4042 /* When generating a shared object, these relocations
4043 are copied into the output file to be resolved at run
4049 _bfd_elf_section_offset (output_bfd, info, input_section,
4051 if (outrel.r_offset == (bfd_vma) -1)
4053 else if (outrel.r_offset == (bfd_vma) -2)
4054 skip = TRUE, relocate = TRUE;
4056 outrel.r_offset += (input_section->output_section->vma
4057 + input_section->output_offset);
4060 memset (&outrel, 0, sizeof outrel);
4062 /* h->dynindx may be -1 if this symbol was marked to
4066 && (IS_X86_64_PCREL_TYPE (r_type)
4068 || ! SYMBOLIC_BIND (info, h)
4069 || ! h->def_regular))
4071 outrel.r_info = htab->r_info (h->dynindx, r_type);
4072 outrel.r_addend = rel->r_addend;
4076 /* This symbol is local, or marked to become local. */
4077 if (r_type == htab->pointer_r_type)
4080 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4081 outrel.r_addend = relocation + rel->r_addend;
4083 else if (r_type == R_X86_64_64
4084 && !ABI_64_P (output_bfd))
4087 outrel.r_info = htab->r_info (0,
4088 R_X86_64_RELATIVE64);
4089 outrel.r_addend = relocation + rel->r_addend;
4090 /* Check addend overflow. */
4091 if ((outrel.r_addend & 0x80000000)
4092 != (rel->r_addend & 0x80000000))
4095 int addend = rel->r_addend;
4096 if (h && h->root.root.string)
4097 name = h->root.root.string;
4099 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4102 (*_bfd_error_handler)
4103 (_("%B: addend -0x%x in relocation %s against "
4104 "symbol `%s' at 0x%lx in section `%A' is "
4106 input_bfd, input_section, addend,
4107 x86_64_elf_howto_table[r_type].name,
4108 name, (unsigned long) rel->r_offset);
4110 (*_bfd_error_handler)
4111 (_("%B: addend 0x%x in relocation %s against "
4112 "symbol `%s' at 0x%lx in section `%A' is "
4114 input_bfd, input_section, addend,
4115 x86_64_elf_howto_table[r_type].name,
4116 name, (unsigned long) rel->r_offset);
4117 bfd_set_error (bfd_error_bad_value);
4125 if (bfd_is_abs_section (sec))
4127 else if (sec == NULL || sec->owner == NULL)
4129 bfd_set_error (bfd_error_bad_value);
4136 /* We are turning this relocation into one
4137 against a section symbol. It would be
4138 proper to subtract the symbol's value,
4139 osec->vma, from the emitted reloc addend,
4140 but ld.so expects buggy relocs. */
4141 osec = sec->output_section;
4142 sindx = elf_section_data (osec)->dynindx;
4145 asection *oi = htab->elf.text_index_section;
4146 sindx = elf_section_data (oi)->dynindx;
4148 BFD_ASSERT (sindx != 0);
4151 outrel.r_info = htab->r_info (sindx, r_type);
4152 outrel.r_addend = relocation + rel->r_addend;
4156 sreloc = elf_section_data (input_section)->sreloc;
4158 if (sreloc == NULL || sreloc->contents == NULL)
4160 r = bfd_reloc_notsupported;
4161 goto check_relocation_error;
4164 elf_append_rela (output_bfd, sreloc, &outrel);
4166 /* If this reloc is against an external symbol, we do
4167 not want to fiddle with the addend. Otherwise, we
4168 need to include the symbol value so that it becomes
4169 an addend for the dynamic reloc. */
4176 case R_X86_64_TLSGD:
4177 case R_X86_64_GOTPC32_TLSDESC:
4178 case R_X86_64_TLSDESC_CALL:
4179 case R_X86_64_GOTTPOFF:
4180 tls_type = GOT_UNKNOWN;
4181 if (h == NULL && local_got_offsets)
4182 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
4184 tls_type = elf_x86_64_hash_entry (h)->tls_type;
4186 if (! elf_x86_64_tls_transition (info, input_bfd,
4187 input_section, contents,
4188 symtab_hdr, sym_hashes,
4189 &r_type, tls_type, rel,
4190 relend, h, r_symndx))
4193 if (r_type == R_X86_64_TPOFF32)
4195 bfd_vma roff = rel->r_offset;
4197 BFD_ASSERT (! unresolved_reloc);
4199 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
4201 /* GD->LE transition. For 64bit, change
4202 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4203 .word 0x6666; rex64; call __tls_get_addr
4206 leaq foo@tpoff(%rax), %rax
4208 leaq foo@tlsgd(%rip), %rdi
4209 .word 0x6666; rex64; call __tls_get_addr
4212 leaq foo@tpoff(%rax), %rax
4213 For largepic, change:
4214 leaq foo@tlsgd(%rip), %rdi
4215 movabsq $__tls_get_addr@pltoff, %rax
4220 leaq foo@tpoff(%rax), %rax
4221 nopw 0x0(%rax,%rax,1) */
4223 if (ABI_64_P (output_bfd)
4224 && contents[roff + 5] == (bfd_byte) '\xb8')
4226 memcpy (contents + roff - 3,
4227 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4228 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4231 else if (ABI_64_P (output_bfd))
4232 memcpy (contents + roff - 4,
4233 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4236 memcpy (contents + roff - 3,
4237 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4239 bfd_put_32 (output_bfd,
4240 elf_x86_64_tpoff (info, relocation),
4241 contents + roff + 8 + largepic);
4242 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4246 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
4248 /* GDesc -> LE transition.
4249 It's originally something like:
4250 leaq x@tlsdesc(%rip), %rax
4253 movl $x@tpoff, %rax. */
4255 unsigned int val, type;
4257 type = bfd_get_8 (input_bfd, contents + roff - 3);
4258 val = bfd_get_8 (input_bfd, contents + roff - 1);
4259 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
4260 contents + roff - 3);
4261 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
4262 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4263 contents + roff - 1);
4264 bfd_put_32 (output_bfd,
4265 elf_x86_64_tpoff (info, relocation),
4269 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
4271 /* GDesc -> LE transition.
4276 bfd_put_8 (output_bfd, 0x66, contents + roff);
4277 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4280 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
4282 /* IE->LE transition:
4283 Originally it can be one of:
4284 movq foo@gottpoff(%rip), %reg
4285 addq foo@gottpoff(%rip), %reg
4288 leaq foo(%reg), %reg
4291 unsigned int val, type, reg;
4293 val = bfd_get_8 (input_bfd, contents + roff - 3);
4294 type = bfd_get_8 (input_bfd, contents + roff - 2);
4295 reg = bfd_get_8 (input_bfd, contents + roff - 1);
4301 bfd_put_8 (output_bfd, 0x49,
4302 contents + roff - 3);
4303 else if (!ABI_64_P (output_bfd) && val == 0x44)
4304 bfd_put_8 (output_bfd, 0x41,
4305 contents + roff - 3);
4306 bfd_put_8 (output_bfd, 0xc7,
4307 contents + roff - 2);
4308 bfd_put_8 (output_bfd, 0xc0 | reg,
4309 contents + roff - 1);
4313 /* addq -> addq - addressing with %rsp/%r12 is
4316 bfd_put_8 (output_bfd, 0x49,
4317 contents + roff - 3);
4318 else if (!ABI_64_P (output_bfd) && val == 0x44)
4319 bfd_put_8 (output_bfd, 0x41,
4320 contents + roff - 3);
4321 bfd_put_8 (output_bfd, 0x81,
4322 contents + roff - 2);
4323 bfd_put_8 (output_bfd, 0xc0 | reg,
4324 contents + roff - 1);
4330 bfd_put_8 (output_bfd, 0x4d,
4331 contents + roff - 3);
4332 else if (!ABI_64_P (output_bfd) && val == 0x44)
4333 bfd_put_8 (output_bfd, 0x45,
4334 contents + roff - 3);
4335 bfd_put_8 (output_bfd, 0x8d,
4336 contents + roff - 2);
4337 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
4338 contents + roff - 1);
4340 bfd_put_32 (output_bfd,
4341 elf_x86_64_tpoff (info, relocation),
4349 if (htab->elf.sgot == NULL)
4354 off = h->got.offset;
4355 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
4359 if (local_got_offsets == NULL)
4362 off = local_got_offsets[r_symndx];
4363 offplt = local_tlsdesc_gotents[r_symndx];
4370 Elf_Internal_Rela outrel;
4374 if (htab->elf.srelgot == NULL)
4377 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4379 if (GOT_TLS_GDESC_P (tls_type))
4381 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
4382 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
4383 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
4384 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4385 + htab->elf.sgotplt->output_offset
4387 + htab->sgotplt_jump_table_size);
4388 sreloc = htab->elf.srelplt;
4390 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4392 outrel.r_addend = 0;
4393 elf_append_rela (output_bfd, sreloc, &outrel);
4396 sreloc = htab->elf.srelgot;
4398 outrel.r_offset = (htab->elf.sgot->output_section->vma
4399 + htab->elf.sgot->output_offset + off);
4401 if (GOT_TLS_GD_P (tls_type))
4402 dr_type = R_X86_64_DTPMOD64;
4403 else if (GOT_TLS_GDESC_P (tls_type))
4406 dr_type = R_X86_64_TPOFF64;
4408 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
4409 outrel.r_addend = 0;
4410 if ((dr_type == R_X86_64_TPOFF64
4411 || dr_type == R_X86_64_TLSDESC) && indx == 0)
4412 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
4413 outrel.r_info = htab->r_info (indx, dr_type);
4415 elf_append_rela (output_bfd, sreloc, &outrel);
4417 if (GOT_TLS_GD_P (tls_type))
4421 BFD_ASSERT (! unresolved_reloc);
4422 bfd_put_64 (output_bfd,
4423 relocation - elf_x86_64_dtpoff_base (info),
4424 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4428 bfd_put_64 (output_bfd, 0,
4429 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4430 outrel.r_info = htab->r_info (indx,
4432 outrel.r_offset += GOT_ENTRY_SIZE;
4433 elf_append_rela (output_bfd, sreloc,
4442 local_got_offsets[r_symndx] |= 1;
4445 if (off >= (bfd_vma) -2
4446 && ! GOT_TLS_GDESC_P (tls_type))
4448 if (r_type == ELF32_R_TYPE (rel->r_info))
4450 if (r_type == R_X86_64_GOTPC32_TLSDESC
4451 || r_type == R_X86_64_TLSDESC_CALL)
4452 relocation = htab->elf.sgotplt->output_section->vma
4453 + htab->elf.sgotplt->output_offset
4454 + offplt + htab->sgotplt_jump_table_size;
4456 relocation = htab->elf.sgot->output_section->vma
4457 + htab->elf.sgot->output_offset + off;
4458 unresolved_reloc = FALSE;
4462 bfd_vma roff = rel->r_offset;
4464 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
4466 /* GD->IE transition. For 64bit, change
4467 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4468 .word 0x6666; rex64; call __tls_get_addr@plt
4471 addq foo@gottpoff(%rip), %rax
4473 leaq foo@tlsgd(%rip), %rdi
4474 .word 0x6666; rex64; call __tls_get_addr@plt
4477 addq foo@gottpoff(%rip), %rax
4478 For largepic, change:
4479 leaq foo@tlsgd(%rip), %rdi
4480 movabsq $__tls_get_addr@pltoff, %rax
4485 addq foo@gottpoff(%rax), %rax
4486 nopw 0x0(%rax,%rax,1) */
4488 if (ABI_64_P (output_bfd)
4489 && contents[roff + 5] == (bfd_byte) '\xb8')
4491 memcpy (contents + roff - 3,
4492 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4493 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4496 else if (ABI_64_P (output_bfd))
4497 memcpy (contents + roff - 4,
4498 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4501 memcpy (contents + roff - 3,
4502 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4505 relocation = (htab->elf.sgot->output_section->vma
4506 + htab->elf.sgot->output_offset + off
4509 - input_section->output_section->vma
4510 - input_section->output_offset
4512 bfd_put_32 (output_bfd, relocation,
4513 contents + roff + 8 + largepic);
4514 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4518 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
4520 /* GDesc -> IE transition.
4521 It's originally something like:
4522 leaq x@tlsdesc(%rip), %rax
4525 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4527 /* Now modify the instruction as appropriate. To
4528 turn a leaq into a movq in the form we use it, it
4529 suffices to change the second byte from 0x8d to
4531 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4533 bfd_put_32 (output_bfd,
4534 htab->elf.sgot->output_section->vma
4535 + htab->elf.sgot->output_offset + off
4537 - input_section->output_section->vma
4538 - input_section->output_offset
4543 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
4545 /* GDesc -> IE transition.
4552 bfd_put_8 (output_bfd, 0x66, contents + roff);
4553 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4561 case R_X86_64_TLSLD:
4562 if (! elf_x86_64_tls_transition (info, input_bfd,
4563 input_section, contents,
4564 symtab_hdr, sym_hashes,
4565 &r_type, GOT_UNKNOWN,
4566 rel, relend, h, r_symndx))
4569 if (r_type != R_X86_64_TLSLD)
4571 /* LD->LE transition:
4572 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4573 For 64bit, we change it into:
4574 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4575 For 32bit, we change it into:
4576 nopl 0x0(%rax); movl %fs:0, %eax.
4577 For largepic, change:
4578 leaq foo@tlsgd(%rip), %rdi
4579 movabsq $__tls_get_addr@pltoff, %rax
4583 data32 data32 data32 nopw %cs:0x0(%rax,%rax,1)
4586 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
4587 if (ABI_64_P (output_bfd)
4588 && contents[rel->r_offset + 5] == (bfd_byte) '\xb8')
4589 memcpy (contents + rel->r_offset - 3,
4590 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4591 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4592 else if (ABI_64_P (output_bfd))
4593 memcpy (contents + rel->r_offset - 3,
4594 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4596 memcpy (contents + rel->r_offset - 3,
4597 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4598 /* Skip R_X86_64_PC32/R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4603 if (htab->elf.sgot == NULL)
4606 off = htab->tls_ld_got.offset;
4611 Elf_Internal_Rela outrel;
4613 if (htab->elf.srelgot == NULL)
4616 outrel.r_offset = (htab->elf.sgot->output_section->vma
4617 + htab->elf.sgot->output_offset + off);
4619 bfd_put_64 (output_bfd, 0,
4620 htab->elf.sgot->contents + off);
4621 bfd_put_64 (output_bfd, 0,
4622 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4623 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
4624 outrel.r_addend = 0;
4625 elf_append_rela (output_bfd, htab->elf.srelgot,
4627 htab->tls_ld_got.offset |= 1;
4629 relocation = htab->elf.sgot->output_section->vma
4630 + htab->elf.sgot->output_offset + off;
4631 unresolved_reloc = FALSE;
4634 case R_X86_64_DTPOFF32:
4635 if (!info->executable|| (input_section->flags & SEC_CODE) == 0)
4636 relocation -= elf_x86_64_dtpoff_base (info);
4638 relocation = elf_x86_64_tpoff (info, relocation);
4641 case R_X86_64_TPOFF32:
4642 case R_X86_64_TPOFF64:
4643 BFD_ASSERT (info->executable);
4644 relocation = elf_x86_64_tpoff (info, relocation);
4647 case R_X86_64_DTPOFF64:
4648 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
4649 relocation -= elf_x86_64_dtpoff_base (info);
4656 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4657 because such sections are not SEC_ALLOC and thus ld.so will
4658 not process them. */
4659 if (unresolved_reloc
4660 && !((input_section->flags & SEC_DEBUGGING) != 0
4662 && _bfd_elf_section_offset (output_bfd, info, input_section,
4663 rel->r_offset) != (bfd_vma) -1)
4665 (*_bfd_error_handler)
4666 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4669 (long) rel->r_offset,
4671 h->root.root.string);
4676 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4677 contents, rel->r_offset,
4678 relocation, rel->r_addend);
4680 check_relocation_error:
4681 if (r != bfd_reloc_ok)
4686 name = h->root.root.string;
4689 name = bfd_elf_string_from_elf_section (input_bfd,
4690 symtab_hdr->sh_link,
4695 name = bfd_section_name (input_bfd, sec);
4698 if (r == bfd_reloc_overflow)
4700 if (! ((*info->callbacks->reloc_overflow)
4701 (info, (h ? &h->root : NULL), name, howto->name,
4702 (bfd_vma) 0, input_bfd, input_section,
4708 (*_bfd_error_handler)
4709 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4710 input_bfd, input_section,
4711 (long) rel->r_offset, name, (int) r);
4720 /* Finish up dynamic symbol handling. We set the contents of various
4721 dynamic sections here. */
4724 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
4725 struct bfd_link_info *info,
4726 struct elf_link_hash_entry *h,
4727 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4729 struct elf_x86_64_link_hash_table *htab;
4730 const struct elf_x86_64_backend_data *abed;
4731 bfd_boolean use_plt_bnd;
4733 htab = elf_x86_64_hash_table (info);
4737 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
4738 section only if there is .plt section. */
4739 use_plt_bnd = htab->elf.splt != NULL && htab->plt_bnd != NULL;
4741 ? &elf_x86_64_bnd_arch_bed
4742 : get_elf_x86_64_backend_data (output_bfd));
4744 if (h->plt.offset != (bfd_vma) -1)
4747 bfd_vma got_offset, plt_offset, plt_plt_offset, plt_got_offset;
4748 bfd_vma plt_plt_insn_end, plt_got_insn_size;
4749 Elf_Internal_Rela rela;
4751 asection *plt, *gotplt, *relplt, *resolved_plt;
4752 const struct elf_backend_data *bed;
4754 /* When building a static executable, use .iplt, .igot.plt and
4755 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4756 if (htab->elf.splt != NULL)
4758 plt = htab->elf.splt;
4759 gotplt = htab->elf.sgotplt;
4760 relplt = htab->elf.srelplt;
4764 plt = htab->elf.iplt;
4765 gotplt = htab->elf.igotplt;
4766 relplt = htab->elf.irelplt;
4769 /* This symbol has an entry in the procedure linkage table. Set
4771 if ((h->dynindx == -1
4772 && !((h->forced_local || info->executable)
4774 && h->type == STT_GNU_IFUNC))
4780 /* Get the index in the procedure linkage table which
4781 corresponds to this symbol. This is the index of this symbol
4782 in all the symbols for which we are making plt entries. The
4783 first entry in the procedure linkage table is reserved.
4785 Get the offset into the .got table of the entry that
4786 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4787 bytes. The first three are reserved for the dynamic linker.
4789 For static executables, we don't reserve anything. */
4791 if (plt == htab->elf.splt)
4793 got_offset = h->plt.offset / abed->plt_entry_size - 1;
4794 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
4798 got_offset = h->plt.offset / abed->plt_entry_size;
4799 got_offset = got_offset * GOT_ENTRY_SIZE;
4802 plt_plt_insn_end = abed->plt_plt_insn_end;
4803 plt_plt_offset = abed->plt_plt_offset;
4804 plt_got_insn_size = abed->plt_got_insn_size;
4805 plt_got_offset = abed->plt_got_offset;
4808 /* Use the second PLT with BND relocations. */
4809 const bfd_byte *plt_entry, *plt2_entry;
4810 struct elf_x86_64_link_hash_entry *eh
4811 = (struct elf_x86_64_link_hash_entry *) h;
4813 if (eh->has_bnd_reloc)
4815 plt_entry = elf_x86_64_bnd_plt_entry;
4816 plt2_entry = elf_x86_64_bnd_plt2_entry;
4820 plt_entry = elf_x86_64_legacy_plt_entry;
4821 plt2_entry = elf_x86_64_legacy_plt2_entry;
4823 /* Subtract 1 since there is no BND prefix. */
4824 plt_plt_insn_end -= 1;
4825 plt_plt_offset -= 1;
4826 plt_got_insn_size -= 1;
4827 plt_got_offset -= 1;
4830 BFD_ASSERT (sizeof (elf_x86_64_bnd_plt_entry)
4831 == sizeof (elf_x86_64_legacy_plt_entry));
4833 /* Fill in the entry in the procedure linkage table. */
4834 memcpy (plt->contents + h->plt.offset,
4835 plt_entry, sizeof (elf_x86_64_legacy_plt_entry));
4836 /* Fill in the entry in the second PLT. */
4837 memcpy (htab->plt_bnd->contents + eh->plt_bnd.offset,
4838 plt2_entry, sizeof (elf_x86_64_legacy_plt2_entry));
4840 resolved_plt = htab->plt_bnd;
4841 plt_offset = eh->plt_bnd.offset;
4845 /* Fill in the entry in the procedure linkage table. */
4846 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
4847 abed->plt_entry_size);
4850 plt_offset = h->plt.offset;
4853 /* Insert the relocation positions of the plt section. */
4855 /* Put offset the PC-relative instruction referring to the GOT entry,
4856 subtracting the size of that instruction. */
4857 bfd_put_32 (output_bfd,
4858 (gotplt->output_section->vma
4859 + gotplt->output_offset
4861 - resolved_plt->output_section->vma
4862 - resolved_plt->output_offset
4864 - plt_got_insn_size),
4865 resolved_plt->contents + plt_offset + plt_got_offset);
4867 /* Fill in the entry in the global offset table, initially this
4868 points to the second part of the PLT entry. */
4869 bfd_put_64 (output_bfd, (plt->output_section->vma
4870 + plt->output_offset
4871 + h->plt.offset + abed->plt_lazy_offset),
4872 gotplt->contents + got_offset);
4874 /* Fill in the entry in the .rela.plt section. */
4875 rela.r_offset = (gotplt->output_section->vma
4876 + gotplt->output_offset
4878 if (h->dynindx == -1
4879 || ((info->executable
4880 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4882 && h->type == STT_GNU_IFUNC))
4884 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4885 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4886 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4887 rela.r_addend = (h->root.u.def.value
4888 + h->root.u.def.section->output_section->vma
4889 + h->root.u.def.section->output_offset);
4890 /* R_X86_64_IRELATIVE comes last. */
4891 plt_index = htab->next_irelative_index--;
4895 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
4897 plt_index = htab->next_jump_slot_index++;
4900 /* Don't fill PLT entry for static executables. */
4901 if (plt == htab->elf.splt)
4903 /* Put relocation index. */
4904 bfd_put_32 (output_bfd, plt_index,
4905 plt->contents + h->plt.offset + abed->plt_reloc_offset);
4906 /* Put offset for jmp .PLT0. */
4907 bfd_put_32 (output_bfd, - (h->plt.offset + plt_plt_insn_end),
4908 plt->contents + h->plt.offset + plt_plt_offset);
4911 bed = get_elf_backend_data (output_bfd);
4912 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
4913 bed->s->swap_reloca_out (output_bfd, &rela, loc);
4915 if (!h->def_regular)
4917 /* Mark the symbol as undefined, rather than as defined in
4918 the .plt section. Leave the value if there were any
4919 relocations where pointer equality matters (this is a clue
4920 for the dynamic linker, to make function pointer
4921 comparisons work between an application and shared
4922 library), otherwise set it to zero. If a function is only
4923 called from a binary, there is no need to slow down
4924 shared libraries because of that. */
4925 sym->st_shndx = SHN_UNDEF;
4926 if (!h->pointer_equality_needed)
4931 if (h->got.offset != (bfd_vma) -1
4932 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
4933 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
4935 Elf_Internal_Rela rela;
4937 /* This symbol has an entry in the global offset table. Set it
4939 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4942 rela.r_offset = (htab->elf.sgot->output_section->vma
4943 + htab->elf.sgot->output_offset
4944 + (h->got.offset &~ (bfd_vma) 1));
4946 /* If this is a static link, or it is a -Bsymbolic link and the
4947 symbol is defined locally or was forced to be local because
4948 of a version file, we just want to emit a RELATIVE reloc.
4949 The entry in the global offset table will already have been
4950 initialized in the relocate_section function. */
4952 && h->type == STT_GNU_IFUNC)
4956 /* Generate R_X86_64_GLOB_DAT. */
4963 if (!h->pointer_equality_needed)
4966 /* For non-shared object, we can't use .got.plt, which
4967 contains the real function addres if we need pointer
4968 equality. We load the GOT entry with the PLT entry. */
4969 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4970 bfd_put_64 (output_bfd, (plt->output_section->vma
4971 + plt->output_offset
4973 htab->elf.sgot->contents + h->got.offset);
4977 else if (info->shared
4978 && SYMBOL_REFERENCES_LOCAL (info, h))
4980 if (!h->def_regular)
4982 BFD_ASSERT((h->got.offset & 1) != 0);
4983 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4984 rela.r_addend = (h->root.u.def.value
4985 + h->root.u.def.section->output_section->vma
4986 + h->root.u.def.section->output_offset);
4990 BFD_ASSERT((h->got.offset & 1) == 0);
4992 bfd_put_64 (output_bfd, (bfd_vma) 0,
4993 htab->elf.sgot->contents + h->got.offset);
4994 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
4998 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
5003 Elf_Internal_Rela rela;
5005 /* This symbol needs a copy reloc. Set it up. */
5007 if (h->dynindx == -1
5008 || (h->root.type != bfd_link_hash_defined
5009 && h->root.type != bfd_link_hash_defweak)
5010 || htab->srelbss == NULL)
5013 rela.r_offset = (h->root.u.def.value
5014 + h->root.u.def.section->output_section->vma
5015 + h->root.u.def.section->output_offset);
5016 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
5018 elf_append_rela (output_bfd, htab->srelbss, &rela);
5024 /* Finish up local dynamic symbol handling. We set the contents of
5025 various dynamic sections here. */
5028 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
5030 struct elf_link_hash_entry *h
5031 = (struct elf_link_hash_entry *) *slot;
5032 struct bfd_link_info *info
5033 = (struct bfd_link_info *) inf;
5035 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
5039 /* Used to decide how to sort relocs in an optimal manner for the
5040 dynamic linker, before writing them out. */
5042 static enum elf_reloc_type_class
5043 elf_x86_64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
5044 const asection *rel_sec ATTRIBUTE_UNUSED,
5045 const Elf_Internal_Rela *rela)
5047 switch ((int) ELF32_R_TYPE (rela->r_info))
5049 case R_X86_64_RELATIVE:
5050 case R_X86_64_RELATIVE64:
5051 return reloc_class_relative;
5052 case R_X86_64_JUMP_SLOT:
5053 return reloc_class_plt;
5055 return reloc_class_copy;
5057 return reloc_class_normal;
5061 /* Finish up the dynamic sections. */
5064 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
5065 struct bfd_link_info *info)
5067 struct elf_x86_64_link_hash_table *htab;
5070 const struct elf_x86_64_backend_data *abed;
5072 htab = elf_x86_64_hash_table (info);
5076 /* Use MPX backend data in case of BND relocation. Use .plt_bnd
5077 section only if there is .plt section. */
5078 abed = (htab->elf.splt != NULL && htab->plt_bnd != NULL
5079 ? &elf_x86_64_bnd_arch_bed
5080 : get_elf_x86_64_backend_data (output_bfd));
5082 dynobj = htab->elf.dynobj;
5083 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5085 if (htab->elf.dynamic_sections_created)
5087 bfd_byte *dyncon, *dynconend;
5088 const struct elf_backend_data *bed;
5089 bfd_size_type sizeof_dyn;
5091 if (sdyn == NULL || htab->elf.sgot == NULL)
5094 bed = get_elf_backend_data (dynobj);
5095 sizeof_dyn = bed->s->sizeof_dyn;
5096 dyncon = sdyn->contents;
5097 dynconend = sdyn->contents + sdyn->size;
5098 for (; dyncon < dynconend; dyncon += sizeof_dyn)
5100 Elf_Internal_Dyn dyn;
5103 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
5111 s = htab->elf.sgotplt;
5112 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5116 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
5120 s = htab->elf.srelplt->output_section;
5121 dyn.d_un.d_val = s->size;
5125 /* The procedure linkage table relocs (DT_JMPREL) should
5126 not be included in the overall relocs (DT_RELA).
5127 Therefore, we override the DT_RELASZ entry here to
5128 make it not include the JMPREL relocs. Since the
5129 linker script arranges for .rela.plt to follow all
5130 other relocation sections, we don't have to worry
5131 about changing the DT_RELA entry. */
5132 if (htab->elf.srelplt != NULL)
5134 s = htab->elf.srelplt->output_section;
5135 dyn.d_un.d_val -= s->size;
5139 case DT_TLSDESC_PLT:
5141 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5142 + htab->tlsdesc_plt;
5145 case DT_TLSDESC_GOT:
5147 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5148 + htab->tlsdesc_got;
5152 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
5155 /* Fill in the special first entry in the procedure linkage table. */
5156 if (htab->elf.splt && htab->elf.splt->size > 0)
5158 /* Fill in the first entry in the procedure linkage table. */
5159 memcpy (htab->elf.splt->contents,
5160 abed->plt0_entry, abed->plt_entry_size);
5161 /* Add offset for pushq GOT+8(%rip), since the instruction
5162 uses 6 bytes subtract this value. */
5163 bfd_put_32 (output_bfd,
5164 (htab->elf.sgotplt->output_section->vma
5165 + htab->elf.sgotplt->output_offset
5167 - htab->elf.splt->output_section->vma
5168 - htab->elf.splt->output_offset
5170 htab->elf.splt->contents + abed->plt0_got1_offset);
5171 /* Add offset for the PC-relative instruction accessing GOT+16,
5172 subtracting the offset to the end of that instruction. */
5173 bfd_put_32 (output_bfd,
5174 (htab->elf.sgotplt->output_section->vma
5175 + htab->elf.sgotplt->output_offset
5177 - htab->elf.splt->output_section->vma
5178 - htab->elf.splt->output_offset
5179 - abed->plt0_got2_insn_end),
5180 htab->elf.splt->contents + abed->plt0_got2_offset);
5182 elf_section_data (htab->elf.splt->output_section)
5183 ->this_hdr.sh_entsize = abed->plt_entry_size;
5185 if (htab->tlsdesc_plt)
5187 bfd_put_64 (output_bfd, (bfd_vma) 0,
5188 htab->elf.sgot->contents + htab->tlsdesc_got);
5190 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
5191 abed->plt0_entry, abed->plt_entry_size);
5193 /* Add offset for pushq GOT+8(%rip), since the
5194 instruction uses 6 bytes subtract this value. */
5195 bfd_put_32 (output_bfd,
5196 (htab->elf.sgotplt->output_section->vma
5197 + htab->elf.sgotplt->output_offset
5199 - htab->elf.splt->output_section->vma
5200 - htab->elf.splt->output_offset
5203 htab->elf.splt->contents
5204 + htab->tlsdesc_plt + abed->plt0_got1_offset);
5205 /* Add offset for the PC-relative instruction accessing GOT+TDG,
5206 where TGD stands for htab->tlsdesc_got, subtracting the offset
5207 to the end of that instruction. */
5208 bfd_put_32 (output_bfd,
5209 (htab->elf.sgot->output_section->vma
5210 + htab->elf.sgot->output_offset
5212 - htab->elf.splt->output_section->vma
5213 - htab->elf.splt->output_offset
5215 - abed->plt0_got2_insn_end),
5216 htab->elf.splt->contents
5217 + htab->tlsdesc_plt + abed->plt0_got2_offset);
5222 if (htab->plt_bnd != NULL)
5223 elf_section_data (htab->plt_bnd->output_section)
5224 ->this_hdr.sh_entsize = sizeof (elf_x86_64_bnd_plt2_entry);
5226 if (htab->elf.sgotplt)
5228 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5230 (*_bfd_error_handler)
5231 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5235 /* Fill in the first three entries in the global offset table. */
5236 if (htab->elf.sgotplt->size > 0)
5238 /* Set the first entry in the global offset table to the address of
5239 the dynamic section. */
5241 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
5243 bfd_put_64 (output_bfd,
5244 sdyn->output_section->vma + sdyn->output_offset,
5245 htab->elf.sgotplt->contents);
5246 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5247 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
5248 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
5251 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
5255 /* Adjust .eh_frame for .plt section. */
5256 if (htab->plt_eh_frame != NULL
5257 && htab->plt_eh_frame->contents != NULL)
5259 if (htab->elf.splt != NULL
5260 && htab->elf.splt->size != 0
5261 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5262 && htab->elf.splt->output_section != NULL
5263 && htab->plt_eh_frame->output_section != NULL)
5265 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5266 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5267 + htab->plt_eh_frame->output_offset
5268 + PLT_FDE_START_OFFSET;
5269 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5270 htab->plt_eh_frame->contents
5271 + PLT_FDE_START_OFFSET);
5273 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5275 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5277 htab->plt_eh_frame->contents))
5282 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5283 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
5286 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5287 htab_traverse (htab->loc_hash_table,
5288 elf_x86_64_finish_local_dynamic_symbol,
5294 /* Return address for Ith PLT stub in section PLT, for relocation REL
5295 or (bfd_vma) -1 if it should not be included. */
5298 elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt,
5299 const arelent *rel ATTRIBUTE_UNUSED)
5301 return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner);
5304 /* Similar to _bfd_elf_get_synthetic_symtab, with .plt.bnd section
5308 elf_x86_64_get_synthetic_symtab (bfd *abfd,
5315 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5318 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5322 Elf_Internal_Shdr *hdr;
5327 plt = bfd_get_section_by_name (abfd, ".plt.bnd");
5328 /* Use the generic ELF version if there is no .plt.bnd section. */
5330 return _bfd_elf_get_synthetic_symtab (abfd, symcount, syms,
5331 dynsymcount, dynsyms, ret);
5335 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
5338 if (dynsymcount <= 0)
5341 relplt = bfd_get_section_by_name (abfd, ".rela.plt");
5345 hdr = &elf_section_data (relplt)->this_hdr;
5346 if (hdr->sh_link != elf_dynsymtab (abfd)
5347 || (hdr->sh_type != SHT_REL && hdr->sh_type != SHT_RELA))
5350 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5351 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5354 count = relplt->size / hdr->sh_entsize;
5355 size = count * sizeof (asymbol);
5356 p = relplt->relocation;
5357 for (i = 0; i < count; i++, p += bed->s->int_rels_per_ext_rel)
5359 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
5361 size += sizeof ("+0x") - 1 + 8 + 8;
5364 s = *ret = (asymbol *) bfd_malloc (size);
5368 names = (char *) (s + count);
5369 p = relplt->relocation;
5372 for (i = 0; i < count; i++, p++)
5376 *s = **p->sym_ptr_ptr;
5377 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL set. Since
5378 we are defining a symbol, ensure one of them is set. */
5379 if ((s->flags & BSF_LOCAL) == 0)
5380 s->flags |= BSF_GLOBAL;
5381 s->flags |= BSF_SYNTHETIC;
5386 len = strlen ((*p->sym_ptr_ptr)->name);
5387 memcpy (names, (*p->sym_ptr_ptr)->name, len);
5393 memcpy (names, "+0x", sizeof ("+0x") - 1);
5394 names += sizeof ("+0x") - 1;
5395 bfd_sprintf_vma (abfd, buf, p->addend);
5396 for (a = buf; *a == '0'; ++a)
5399 memcpy (names, a, len);
5402 memcpy (names, "@plt", sizeof ("@plt"));
5403 names += sizeof ("@plt");
5405 addr += sizeof (elf_x86_64_legacy_plt2_entry);
5411 /* Handle an x86-64 specific section when reading an object file. This
5412 is called when elfcode.h finds a section with an unknown type. */
5415 elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
5416 const char *name, int shindex)
5418 if (hdr->sh_type != SHT_X86_64_UNWIND)
5421 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
5427 /* Hook called by the linker routine which adds symbols from an object
5428 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5432 elf_x86_64_add_symbol_hook (bfd *abfd,
5433 struct bfd_link_info *info,
5434 Elf_Internal_Sym *sym,
5435 const char **namep ATTRIBUTE_UNUSED,
5436 flagword *flagsp ATTRIBUTE_UNUSED,
5442 switch (sym->st_shndx)
5444 case SHN_X86_64_LCOMMON:
5445 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
5448 lcomm = bfd_make_section_with_flags (abfd,
5452 | SEC_LINKER_CREATED));
5455 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
5458 *valp = sym->st_size;
5462 if ((abfd->flags & DYNAMIC) == 0
5463 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
5464 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
5465 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
5471 /* Given a BFD section, try to locate the corresponding ELF section
5475 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
5476 asection *sec, int *index_return)
5478 if (sec == &_bfd_elf_large_com_section)
5480 *index_return = SHN_X86_64_LCOMMON;
5486 /* Process a symbol. */
5489 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5492 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5494 switch (elfsym->internal_elf_sym.st_shndx)
5496 case SHN_X86_64_LCOMMON:
5497 asym->section = &_bfd_elf_large_com_section;
5498 asym->value = elfsym->internal_elf_sym.st_size;
5499 /* Common symbol doesn't set BSF_GLOBAL. */
5500 asym->flags &= ~BSF_GLOBAL;
5506 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
5508 return (sym->st_shndx == SHN_COMMON
5509 || sym->st_shndx == SHN_X86_64_LCOMMON);
5513 elf_x86_64_common_section_index (asection *sec)
5515 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5518 return SHN_X86_64_LCOMMON;
5522 elf_x86_64_common_section (asection *sec)
5524 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5525 return bfd_com_section_ptr;
5527 return &_bfd_elf_large_com_section;
5531 elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
5532 const Elf_Internal_Sym *sym,
5537 const asection *oldsec)
5539 /* A normal common symbol and a large common symbol result in a
5540 normal common symbol. We turn the large common symbol into a
5543 && h->root.type == bfd_link_hash_common
5545 && bfd_is_com_section (*psec)
5548 if (sym->st_shndx == SHN_COMMON
5549 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
5551 h->root.u.c.p->section
5552 = bfd_make_section_old_way (oldbfd, "COMMON");
5553 h->root.u.c.p->section->flags = SEC_ALLOC;
5555 else if (sym->st_shndx == SHN_X86_64_LCOMMON
5556 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
5557 *psec = bfd_com_section_ptr;
5564 elf_x86_64_additional_program_headers (bfd *abfd,
5565 struct bfd_link_info *info ATTRIBUTE_UNUSED)
5570 /* Check to see if we need a large readonly segment. */
5571 s = bfd_get_section_by_name (abfd, ".lrodata");
5572 if (s && (s->flags & SEC_LOAD))
5575 /* Check to see if we need a large data segment. Since .lbss sections
5576 is placed right after the .bss section, there should be no need for
5577 a large data segment just because of .lbss. */
5578 s = bfd_get_section_by_name (abfd, ".ldata");
5579 if (s && (s->flags & SEC_LOAD))
5585 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5588 elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
5590 if (h->plt.offset != (bfd_vma) -1
5592 && !h->pointer_equality_needed)
5595 return _bfd_elf_hash_symbol (h);
5598 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5601 elf_x86_64_relocs_compatible (const bfd_target *input,
5602 const bfd_target *output)
5604 return ((xvec_get_elf_backend_data (input)->s->elfclass
5605 == xvec_get_elf_backend_data (output)->s->elfclass)
5606 && _bfd_elf_relocs_compatible (input, output));
5609 static const struct bfd_elf_special_section
5610 elf_x86_64_special_sections[]=
5612 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5613 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5614 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
5615 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5616 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5617 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5618 { NULL, 0, 0, 0, 0 }
5621 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5622 #define TARGET_LITTLE_NAME "elf64-x86-64"
5623 #define ELF_ARCH bfd_arch_i386
5624 #define ELF_TARGET_ID X86_64_ELF_DATA
5625 #define ELF_MACHINE_CODE EM_X86_64
5626 #define ELF_MAXPAGESIZE 0x200000
5627 #define ELF_MINPAGESIZE 0x1000
5628 #define ELF_COMMONPAGESIZE 0x1000
5630 #define elf_backend_can_gc_sections 1
5631 #define elf_backend_can_refcount 1
5632 #define elf_backend_want_got_plt 1
5633 #define elf_backend_plt_readonly 1
5634 #define elf_backend_want_plt_sym 0
5635 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5636 #define elf_backend_rela_normal 1
5637 #define elf_backend_plt_alignment 4
5639 #define elf_info_to_howto elf_x86_64_info_to_howto
5641 #define bfd_elf64_bfd_link_hash_table_create \
5642 elf_x86_64_link_hash_table_create
5643 #define bfd_elf64_bfd_link_hash_table_free \
5644 elf_x86_64_link_hash_table_free
5645 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5646 #define bfd_elf64_bfd_reloc_name_lookup \
5647 elf_x86_64_reloc_name_lookup
5649 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
5650 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5651 #define elf_backend_check_relocs elf_x86_64_check_relocs
5652 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5653 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5654 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5655 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5656 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5657 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5658 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5659 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5661 #define elf_backend_write_core_note elf_x86_64_write_core_note
5663 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5664 #define elf_backend_relocate_section elf_x86_64_relocate_section
5665 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5666 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
5667 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5668 #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
5669 #define elf_backend_object_p elf64_x86_64_elf_object_p
5670 #define bfd_elf64_mkobject elf_x86_64_mkobject
5671 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5673 #define elf_backend_section_from_shdr \
5674 elf_x86_64_section_from_shdr
5676 #define elf_backend_section_from_bfd_section \
5677 elf_x86_64_elf_section_from_bfd_section
5678 #define elf_backend_add_symbol_hook \
5679 elf_x86_64_add_symbol_hook
5680 #define elf_backend_symbol_processing \
5681 elf_x86_64_symbol_processing
5682 #define elf_backend_common_section_index \
5683 elf_x86_64_common_section_index
5684 #define elf_backend_common_section \
5685 elf_x86_64_common_section
5686 #define elf_backend_common_definition \
5687 elf_x86_64_common_definition
5688 #define elf_backend_merge_symbol \
5689 elf_x86_64_merge_symbol
5690 #define elf_backend_special_sections \
5691 elf_x86_64_special_sections
5692 #define elf_backend_additional_program_headers \
5693 elf_x86_64_additional_program_headers
5694 #define elf_backend_hash_symbol \
5695 elf_x86_64_hash_symbol
5697 #include "elf64-target.h"
5699 /* FreeBSD support. */
5701 #undef TARGET_LITTLE_SYM
5702 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5703 #undef TARGET_LITTLE_NAME
5704 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5707 #define ELF_OSABI ELFOSABI_FREEBSD
5710 #define elf64_bed elf64_x86_64_fbsd_bed
5712 #include "elf64-target.h"
5714 /* Solaris 2 support. */
5716 #undef TARGET_LITTLE_SYM
5717 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5718 #undef TARGET_LITTLE_NAME
5719 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5721 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5722 objects won't be recognized. */
5726 #define elf64_bed elf64_x86_64_sol2_bed
5728 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5730 #undef elf_backend_static_tls_alignment
5731 #define elf_backend_static_tls_alignment 16
5733 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5735 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5737 #undef elf_backend_want_plt_sym
5738 #define elf_backend_want_plt_sym 1
5740 #include "elf64-target.h"
5742 #undef bfd_elf64_get_synthetic_symtab
5744 /* Native Client support. */
5747 elf64_x86_64_nacl_elf_object_p (bfd *abfd)
5749 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
5750 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
5754 #undef TARGET_LITTLE_SYM
5755 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
5756 #undef TARGET_LITTLE_NAME
5757 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5759 #define elf64_bed elf64_x86_64_nacl_bed
5761 #undef ELF_MAXPAGESIZE
5762 #undef ELF_MINPAGESIZE
5763 #undef ELF_COMMONPAGESIZE
5764 #define ELF_MAXPAGESIZE 0x10000
5765 #define ELF_MINPAGESIZE 0x10000
5766 #define ELF_COMMONPAGESIZE 0x10000
5768 /* Restore defaults. */
5770 #undef elf_backend_static_tls_alignment
5771 #undef elf_backend_want_plt_sym
5772 #define elf_backend_want_plt_sym 0
5774 /* NaCl uses substantially different PLT entries for the same effects. */
5776 #undef elf_backend_plt_alignment
5777 #define elf_backend_plt_alignment 5
5778 #define NACL_PLT_ENTRY_SIZE 64
5779 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5781 static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
5783 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5784 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5785 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5786 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5787 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5789 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5790 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
5792 /* 32 bytes of nop to pad out to the standard size. */
5793 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5794 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5795 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5796 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5797 0x66, /* excess data32 prefix */
5801 static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5803 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5804 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5805 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5806 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5808 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5809 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5810 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5812 /* Lazy GOT entries point here (32-byte aligned). */
5813 0x68, /* pushq immediate */
5814 0, 0, 0, 0, /* replaced with index into relocation table. */
5815 0xe9, /* jmp relative */
5816 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5818 /* 22 bytes of nop to pad out to the standard size. */
5819 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5820 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5821 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5824 /* .eh_frame covering the .plt section. */
5826 static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
5828 #if (PLT_CIE_LENGTH != 20 \
5829 || PLT_FDE_LENGTH != 36 \
5830 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5831 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5832 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5834 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5835 0, 0, 0, 0, /* CIE ID */
5836 1, /* CIE version */
5837 'z', 'R', 0, /* Augmentation string */
5838 1, /* Code alignment factor */
5839 0x78, /* Data alignment factor */
5840 16, /* Return address column */
5841 1, /* Augmentation size */
5842 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5843 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5844 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5845 DW_CFA_nop, DW_CFA_nop,
5847 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5848 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
5849 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5850 0, 0, 0, 0, /* .plt size goes here */
5851 0, /* Augmentation size */
5852 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
5853 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5854 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
5855 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5856 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5857 13, /* Block length */
5858 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
5859 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
5860 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5861 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
5862 DW_CFA_nop, DW_CFA_nop
5865 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
5867 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
5868 elf_x86_64_nacl_plt_entry, /* plt_entry */
5869 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5870 2, /* plt0_got1_offset */
5871 9, /* plt0_got2_offset */
5872 13, /* plt0_got2_insn_end */
5873 3, /* plt_got_offset */
5874 33, /* plt_reloc_offset */
5875 38, /* plt_plt_offset */
5876 7, /* plt_got_insn_size */
5877 42, /* plt_plt_insn_end */
5878 32, /* plt_lazy_offset */
5879 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
5880 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
5883 #undef elf_backend_arch_data
5884 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5886 #undef elf_backend_object_p
5887 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5888 #undef elf_backend_modify_segment_map
5889 #define elf_backend_modify_segment_map nacl_modify_segment_map
5890 #undef elf_backend_modify_program_headers
5891 #define elf_backend_modify_program_headers nacl_modify_program_headers
5892 #undef elf_backend_final_write_processing
5893 #define elf_backend_final_write_processing nacl_final_write_processing
5895 #include "elf64-target.h"
5897 /* Native Client x32 support. */
5900 elf32_x86_64_nacl_elf_object_p (bfd *abfd)
5902 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
5903 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
5907 #undef TARGET_LITTLE_SYM
5908 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
5909 #undef TARGET_LITTLE_NAME
5910 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5912 #define elf32_bed elf32_x86_64_nacl_bed
5914 #define bfd_elf32_bfd_link_hash_table_create \
5915 elf_x86_64_link_hash_table_create
5916 #define bfd_elf32_bfd_link_hash_table_free \
5917 elf_x86_64_link_hash_table_free
5918 #define bfd_elf32_bfd_reloc_type_lookup \
5919 elf_x86_64_reloc_type_lookup
5920 #define bfd_elf32_bfd_reloc_name_lookup \
5921 elf_x86_64_reloc_name_lookup
5922 #define bfd_elf32_mkobject \
5925 #undef elf_backend_object_p
5926 #define elf_backend_object_p \
5927 elf32_x86_64_nacl_elf_object_p
5929 #undef elf_backend_bfd_from_remote_memory
5930 #define elf_backend_bfd_from_remote_memory \
5931 _bfd_elf32_bfd_from_remote_memory
5933 #undef elf_backend_size_info
5934 #define elf_backend_size_info \
5935 _bfd_elf32_size_info
5937 #include "elf32-target.h"
5939 /* Restore defaults. */
5940 #undef elf_backend_object_p
5941 #define elf_backend_object_p elf64_x86_64_elf_object_p
5942 #undef elf_backend_bfd_from_remote_memory
5943 #undef elf_backend_size_info
5944 #undef elf_backend_modify_segment_map
5945 #undef elf_backend_modify_program_headers
5946 #undef elf_backend_final_write_processing
5948 /* Intel L1OM support. */
5951 elf64_l1om_elf_object_p (bfd *abfd)
5953 /* Set the right machine number for an L1OM elf64 file. */
5954 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
5958 #undef TARGET_LITTLE_SYM
5959 #define TARGET_LITTLE_SYM l1om_elf64_vec
5960 #undef TARGET_LITTLE_NAME
5961 #define TARGET_LITTLE_NAME "elf64-l1om"
5963 #define ELF_ARCH bfd_arch_l1om
5965 #undef ELF_MACHINE_CODE
5966 #define ELF_MACHINE_CODE EM_L1OM
5971 #define elf64_bed elf64_l1om_bed
5973 #undef elf_backend_object_p
5974 #define elf_backend_object_p elf64_l1om_elf_object_p
5976 /* Restore defaults. */
5977 #undef ELF_MAXPAGESIZE
5978 #undef ELF_MINPAGESIZE
5979 #undef ELF_COMMONPAGESIZE
5980 #define ELF_MAXPAGESIZE 0x200000
5981 #define ELF_MINPAGESIZE 0x1000
5982 #define ELF_COMMONPAGESIZE 0x1000
5983 #undef elf_backend_plt_alignment
5984 #define elf_backend_plt_alignment 4
5985 #undef elf_backend_arch_data
5986 #define elf_backend_arch_data &elf_x86_64_arch_bed
5988 #include "elf64-target.h"
5990 /* FreeBSD L1OM support. */
5992 #undef TARGET_LITTLE_SYM
5993 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
5994 #undef TARGET_LITTLE_NAME
5995 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5998 #define ELF_OSABI ELFOSABI_FREEBSD
6001 #define elf64_bed elf64_l1om_fbsd_bed
6003 #include "elf64-target.h"
6005 /* Intel K1OM support. */
6008 elf64_k1om_elf_object_p (bfd *abfd)
6010 /* Set the right machine number for an K1OM elf64 file. */
6011 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
6015 #undef TARGET_LITTLE_SYM
6016 #define TARGET_LITTLE_SYM k1om_elf64_vec
6017 #undef TARGET_LITTLE_NAME
6018 #define TARGET_LITTLE_NAME "elf64-k1om"
6020 #define ELF_ARCH bfd_arch_k1om
6022 #undef ELF_MACHINE_CODE
6023 #define ELF_MACHINE_CODE EM_K1OM
6028 #define elf64_bed elf64_k1om_bed
6030 #undef elf_backend_object_p
6031 #define elf_backend_object_p elf64_k1om_elf_object_p
6033 #undef elf_backend_static_tls_alignment
6035 #undef elf_backend_want_plt_sym
6036 #define elf_backend_want_plt_sym 0
6038 #include "elf64-target.h"
6040 /* FreeBSD K1OM support. */
6042 #undef TARGET_LITTLE_SYM
6043 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6044 #undef TARGET_LITTLE_NAME
6045 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6048 #define ELF_OSABI ELFOSABI_FREEBSD
6051 #define elf64_bed elf64_k1om_fbsd_bed
6053 #include "elf64-target.h"
6055 /* 32bit x86-64 support. */
6057 #undef TARGET_LITTLE_SYM
6058 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6059 #undef TARGET_LITTLE_NAME
6060 #define TARGET_LITTLE_NAME "elf32-x86-64"
6064 #define ELF_ARCH bfd_arch_i386
6066 #undef ELF_MACHINE_CODE
6067 #define ELF_MACHINE_CODE EM_X86_64
6071 #undef elf_backend_object_p
6072 #define elf_backend_object_p \
6073 elf32_x86_64_elf_object_p
6075 #undef elf_backend_bfd_from_remote_memory
6076 #define elf_backend_bfd_from_remote_memory \
6077 _bfd_elf32_bfd_from_remote_memory
6079 #undef elf_backend_size_info
6080 #define elf_backend_size_info \
6081 _bfd_elf32_size_info
6083 #include "elf32-target.h"