1 /* X86-64 specific support for ELF
2 Copyright (C) 2000-2017 Free Software Foundation, Inc.
3 Contributed by Jan Hubicka <jh@suse.cz>.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
22 #include "elfxx-x86.h"
25 #include "libiberty.h"
27 #include "opcode/i386.h"
28 #include "elf/x86-64.h"
35 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
36 #define MINUS_ONE (~ (bfd_vma) 0)
38 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
39 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
40 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
41 since they are the same. */
43 /* The relocation "howto" table. Order of fields:
44 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
45 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
46 static reloc_howto_type x86_64_elf_howto_table[] =
48 HOWTO(R_X86_64_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
49 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
51 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
52 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
54 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
55 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
57 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
58 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
60 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
61 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
63 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
66 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
69 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
72 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
75 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
76 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
78 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
79 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
81 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
82 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
84 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
86 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
88 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
90 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
91 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
92 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
95 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
98 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
101 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
102 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
104 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
105 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
107 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
108 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
110 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
111 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
113 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
114 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
116 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
119 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
121 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
122 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
123 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
124 FALSE, 0xffffffff, 0xffffffff, TRUE),
125 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
126 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
128 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
129 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
131 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
132 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
133 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
134 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
135 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
137 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
138 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
140 HOWTO(R_X86_64_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
141 bfd_elf_generic_reloc, "R_X86_64_SIZE32", FALSE, 0xffffffff, 0xffffffff,
143 HOWTO(R_X86_64_SIZE64, 0, 4, 64, FALSE, 0, complain_overflow_unsigned,
144 bfd_elf_generic_reloc, "R_X86_64_SIZE64", FALSE, MINUS_ONE, MINUS_ONE,
146 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
147 complain_overflow_bitfield, bfd_elf_generic_reloc,
148 "R_X86_64_GOTPC32_TLSDESC",
149 FALSE, 0xffffffff, 0xffffffff, TRUE),
150 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
151 complain_overflow_dont, bfd_elf_generic_reloc,
152 "R_X86_64_TLSDESC_CALL",
154 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
155 complain_overflow_bitfield, bfd_elf_generic_reloc,
157 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
158 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
161 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
164 HOWTO(R_X86_64_PC32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
165 bfd_elf_generic_reloc, "R_X86_64_PC32_BND", FALSE, 0xffffffff, 0xffffffff,
167 HOWTO(R_X86_64_PLT32_BND, 0, 2, 32, TRUE, 0, complain_overflow_signed,
168 bfd_elf_generic_reloc, "R_X86_64_PLT32_BND", FALSE, 0xffffffff, 0xffffffff,
170 HOWTO(R_X86_64_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
171 bfd_elf_generic_reloc, "R_X86_64_GOTPCRELX", FALSE, 0xffffffff,
173 HOWTO(R_X86_64_REX_GOTPCRELX, 0, 2, 32, TRUE, 0, complain_overflow_signed,
174 bfd_elf_generic_reloc, "R_X86_64_REX_GOTPCRELX", FALSE, 0xffffffff,
177 /* We have a gap in the reloc numbers here.
178 R_X86_64_standard counts the number up to this point, and
179 R_X86_64_vt_offset is the value to subtract from a reloc type of
180 R_X86_64_GNU_VT* to form an index into this table. */
181 #define R_X86_64_standard (R_X86_64_REX_GOTPCRELX + 1)
182 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
184 /* GNU extension to record C++ vtable hierarchy. */
185 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
186 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
188 /* GNU extension to record C++ vtable member usage. */
189 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
190 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
193 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
194 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
195 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
199 #define IS_X86_64_PCREL_TYPE(TYPE) \
200 ( ((TYPE) == R_X86_64_PC8) \
201 || ((TYPE) == R_X86_64_PC16) \
202 || ((TYPE) == R_X86_64_PC32) \
203 || ((TYPE) == R_X86_64_PC32_BND) \
204 || ((TYPE) == R_X86_64_PC64))
206 /* Map BFD relocs to the x86_64 elf relocs. */
209 bfd_reloc_code_real_type bfd_reloc_val;
210 unsigned char elf_reloc_val;
213 static const struct elf_reloc_map x86_64_reloc_map[] =
215 { BFD_RELOC_NONE, R_X86_64_NONE, },
216 { BFD_RELOC_64, R_X86_64_64, },
217 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
218 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
219 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
220 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
221 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
222 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
223 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
224 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
225 { BFD_RELOC_32, R_X86_64_32, },
226 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
227 { BFD_RELOC_16, R_X86_64_16, },
228 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
229 { BFD_RELOC_8, R_X86_64_8, },
230 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
231 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
232 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
233 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
234 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
235 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
236 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
237 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
238 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
239 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
240 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
241 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
242 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
243 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
244 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
245 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
246 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
247 { BFD_RELOC_SIZE32, R_X86_64_SIZE32, },
248 { BFD_RELOC_SIZE64, R_X86_64_SIZE64, },
249 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
250 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
251 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
252 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
253 { BFD_RELOC_X86_64_PC32_BND, R_X86_64_PC32_BND, },
254 { BFD_RELOC_X86_64_PLT32_BND, R_X86_64_PLT32_BND, },
255 { BFD_RELOC_X86_64_GOTPCRELX, R_X86_64_GOTPCRELX, },
256 { BFD_RELOC_X86_64_REX_GOTPCRELX, R_X86_64_REX_GOTPCRELX, },
257 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
258 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
261 static reloc_howto_type *
262 elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
266 if (r_type == (unsigned int) R_X86_64_32)
271 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
273 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
274 || r_type >= (unsigned int) R_X86_64_max)
276 if (r_type >= (unsigned int) R_X86_64_standard)
278 /* xgettext:c-format */
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 size in bytes of an entry in the global offset table. */
523 #define GOT_ENTRY_SIZE 8
525 /* The size in bytes of an entry in the lazy procedure linkage table. */
527 #define LAZY_PLT_ENTRY_SIZE 16
529 /* The size in bytes of an entry in the non-lazy procedure linkage
532 #define NON_LAZY_PLT_ENTRY_SIZE 8
534 /* The first entry in a lazy procedure linkage table looks like this.
535 See the SVR4 ABI i386 supplement and the x86-64 ABI to see how this
538 static const bfd_byte elf_x86_64_lazy_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
540 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
541 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
542 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
545 /* Subsequent entries in a lazy procedure linkage table look like this. */
547 static const bfd_byte elf_x86_64_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
549 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
550 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
551 0x68, /* pushq immediate */
552 0, 0, 0, 0, /* replaced with index into relocation table. */
553 0xe9, /* jmp relative */
554 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
557 /* The first entry in a lazy procedure linkage table with BND prefix
560 static const bfd_byte elf_x86_64_lazy_bnd_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
562 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
563 0xf2, 0xff, 0x25, 16, 0, 0, 0, /* bnd jmpq *GOT+16(%rip) */
564 0x0f, 0x1f, 0 /* nopl (%rax) */
567 /* Subsequent entries for branches with BND prefx in a lazy procedure
568 linkage table look like this. */
570 static const bfd_byte elf_x86_64_lazy_bnd_plt_entry[LAZY_PLT_ENTRY_SIZE] =
572 0x68, 0, 0, 0, 0, /* pushq immediate */
573 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
574 0x0f, 0x1f, 0x44, 0, 0 /* nopl 0(%rax,%rax,1) */
577 /* The first entry in the IBT-enabled lazy procedure linkage table is the
578 the same as the lazy PLT with BND prefix so that bound registers are
579 preserved when control is passed to dynamic linker. Subsequent
580 entries for a IBT-enabled lazy procedure linkage table look like
583 static const bfd_byte elf_x86_64_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
585 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
586 0x68, 0, 0, 0, 0, /* pushq immediate */
587 0xf2, 0xe9, 0, 0, 0, 0, /* bnd jmpq relative */
591 /* The first entry in the x32 IBT-enabled lazy procedure linkage table
592 is the same as the normal lazy PLT. Subsequent entries for an
593 x32 IBT-enabled lazy procedure linkage table look like this. */
595 static const bfd_byte elf_x32_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
597 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
598 0x68, 0, 0, 0, 0, /* pushq immediate */
599 0xe9, 0, 0, 0, 0, /* jmpq relative */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* Entries in the non-lazey procedure linkage table look like this. */
605 static const bfd_byte elf_x86_64_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
607 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
608 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
612 /* Entries for branches with BND prefix in the non-lazey procedure
613 linkage table look like this. */
615 static const bfd_byte elf_x86_64_non_lazy_bnd_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
617 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
618 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
622 /* Entries for branches with IBT-enabled in the non-lazey procedure
623 linkage table look like this. They have the same size as the lazy
626 static const bfd_byte elf_x86_64_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
628 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
629 0xf2, 0xff, 0x25, /* bnd jmpq *name@GOTPC(%rip) */
630 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
631 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopl 0x0(%rax,%rax,1) */
634 /* Entries for branches with IBT-enabled in the x32 non-lazey procedure
635 linkage table look like this. They have the same size as the lazy
638 static const bfd_byte elf_x32_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
640 0xf3, 0x0f, 0x1e, 0xfa, /* endbr64 */
641 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
642 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
643 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
646 /* .eh_frame covering the lazy .plt section. */
648 static const bfd_byte elf_x86_64_eh_frame_lazy_plt[] =
650 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
651 0, 0, 0, 0, /* CIE ID */
653 'z', 'R', 0, /* Augmentation string */
654 1, /* Code alignment factor */
655 0x78, /* Data alignment factor */
656 16, /* Return address column */
657 1, /* Augmentation size */
658 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
659 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
660 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
661 DW_CFA_nop, DW_CFA_nop,
663 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
664 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
665 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
666 0, 0, 0, 0, /* .plt size goes here */
667 0, /* Augmentation size */
668 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
669 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
670 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
671 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
672 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
673 11, /* Block length */
674 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
675 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
676 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
677 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
678 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
681 /* .eh_frame covering the lazy BND .plt section. */
683 static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] =
685 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
686 0, 0, 0, 0, /* CIE ID */
688 'z', 'R', 0, /* Augmentation string */
689 1, /* Code alignment factor */
690 0x78, /* Data alignment factor */
691 16, /* Return address column */
692 1, /* Augmentation size */
693 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
694 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
695 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
696 DW_CFA_nop, DW_CFA_nop,
698 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
699 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
700 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
701 0, 0, 0, 0, /* .plt size goes here */
702 0, /* Augmentation size */
703 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
704 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
705 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
706 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
707 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
708 11, /* Block length */
709 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
710 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
711 DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge,
712 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
713 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
716 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
718 static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] =
720 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
721 0, 0, 0, 0, /* CIE ID */
723 'z', 'R', 0, /* Augmentation string */
724 1, /* Code alignment factor */
725 0x78, /* Data alignment factor */
726 16, /* Return address column */
727 1, /* Augmentation size */
728 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
729 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
730 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
731 DW_CFA_nop, DW_CFA_nop,
733 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
734 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
735 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
736 0, 0, 0, 0, /* .plt size goes here */
737 0, /* Augmentation size */
738 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
739 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
740 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
741 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
742 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
743 11, /* Block length */
744 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
745 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
746 DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge,
747 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
748 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
751 /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */
753 static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] =
755 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
756 0, 0, 0, 0, /* CIE ID */
758 'z', 'R', 0, /* Augmentation string */
759 1, /* Code alignment factor */
760 0x78, /* Data alignment factor */
761 16, /* Return address column */
762 1, /* Augmentation size */
763 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
764 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
765 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
766 DW_CFA_nop, DW_CFA_nop,
768 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
769 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
770 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
771 0, 0, 0, 0, /* .plt size goes here */
772 0, /* Augmentation size */
773 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
774 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
775 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
776 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
777 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
778 11, /* Block length */
779 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
780 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
781 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
782 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
783 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
786 /* .eh_frame covering the non-lazy .plt section. */
788 static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] =
790 #define PLT_GOT_FDE_LENGTH 20
791 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
792 0, 0, 0, 0, /* CIE ID */
794 'z', 'R', 0, /* Augmentation string */
795 1, /* Code alignment factor */
796 0x78, /* Data alignment factor */
797 16, /* Return address column */
798 1, /* Augmentation size */
799 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
800 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
801 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
802 DW_CFA_nop, DW_CFA_nop,
804 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
805 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
806 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
807 0, 0, 0, 0, /* non-lazy .plt size goes here */
808 0, /* Augmentation size */
809 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop,
810 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
813 /* Architecture-specific backend data for x86-64. */
815 struct elf_x86_64_backend_data
825 #define get_elf_x86_64_arch_data(bed) \
826 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
828 #define get_elf_x86_64_backend_data(abfd) \
829 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
831 /* These are the standard parameters. */
832 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt =
834 elf_x86_64_lazy_plt0_entry, /* plt0_entry */
835 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
836 elf_x86_64_lazy_plt_entry, /* plt_entry */
837 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
838 2, /* plt0_got1_offset */
839 8, /* plt0_got2_offset */
840 12, /* plt0_got2_insn_end */
841 2, /* plt_got_offset */
842 7, /* plt_reloc_offset */
843 12, /* plt_plt_offset */
844 6, /* plt_got_insn_size */
845 LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */
846 6, /* plt_lazy_offset */
847 elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */
848 elf_x86_64_lazy_plt_entry, /* pic_plt_entry */
849 elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */
850 sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */
853 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt =
855 elf_x86_64_non_lazy_plt_entry, /* plt_entry */
856 elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */
857 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
858 2, /* plt_got_offset */
859 6, /* plt_got_insn_size */
860 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
861 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
864 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt =
866 elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */
867 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
868 elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */
869 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
870 2, /* plt0_got1_offset */
871 1+8, /* plt0_got2_offset */
872 1+12, /* plt0_got2_insn_end */
873 1+2, /* plt_got_offset */
874 1, /* plt_reloc_offset */
875 7, /* plt_plt_offset */
876 1+6, /* plt_got_insn_size */
877 11, /* plt_plt_insn_end */
878 0, /* plt_lazy_offset */
879 elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */
880 elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */
881 elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */
882 sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */
885 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt =
887 elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */
888 elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */
889 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
890 1+2, /* plt_got_offset */
891 1+6, /* plt_got_insn_size */
892 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
893 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
896 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt =
898 elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */
899 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
900 elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */
901 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
902 2, /* plt0_got1_offset */
903 1+8, /* plt0_got2_offset */
904 1+12, /* plt0_got2_insn_end */
905 4+1+2, /* plt_got_offset */
906 4+1, /* plt_reloc_offset */
907 4+1+6, /* plt_plt_offset */
908 4+1+6, /* plt_got_insn_size */
909 4+1+5+5, /* plt_plt_insn_end */
910 0, /* plt_lazy_offset */
911 elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */
912 elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */
913 elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
914 sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
917 static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt =
919 elf_x86_64_lazy_plt0_entry, /* plt0_entry */
920 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
921 elf_x32_lazy_ibt_plt_entry, /* plt_entry */
922 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
923 2, /* plt0_got1_offset */
924 8, /* plt0_got2_offset */
925 12, /* plt0_got2_insn_end */
926 4+2, /* plt_got_offset */
927 4+1, /* plt_reloc_offset */
928 4+6, /* plt_plt_offset */
929 4+6, /* plt_got_insn_size */
930 4+5+5, /* plt_plt_insn_end */
931 0, /* plt_lazy_offset */
932 elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */
933 elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */
934 elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
935 sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
938 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt =
940 elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */
941 elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */
942 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
943 4+1+2, /* plt_got_offset */
944 4+1+6, /* plt_got_insn_size */
945 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
946 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
949 static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt =
951 elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */
952 elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */
953 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
954 4+2, /* plt_got_offset */
955 4+6, /* plt_got_insn_size */
956 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
957 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
960 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
965 #define elf_backend_arch_data &elf_x86_64_arch_bed
968 elf64_x86_64_elf_object_p (bfd *abfd)
970 /* Set the right machine number for an x86-64 elf64 file. */
971 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
976 elf32_x86_64_elf_object_p (bfd *abfd)
978 /* Set the right machine number for an x86-64 elf32 file. */
979 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
983 /* Return TRUE if the TLS access code sequence support transition
987 elf_x86_64_check_tls_transition (bfd *abfd,
988 struct bfd_link_info *info,
991 Elf_Internal_Shdr *symtab_hdr,
992 struct elf_link_hash_entry **sym_hashes,
994 const Elf_Internal_Rela *rel,
995 const Elf_Internal_Rela *relend)
998 unsigned long r_symndx;
999 bfd_boolean largepic = FALSE;
1000 struct elf_link_hash_entry *h;
1002 struct elf_x86_link_hash_table *htab;
1004 bfd_boolean indirect_call;
1006 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
1007 offset = rel->r_offset;
1010 case R_X86_64_TLSGD:
1011 case R_X86_64_TLSLD:
1012 if ((rel + 1) >= relend)
1015 if (r_type == R_X86_64_TLSGD)
1017 /* Check transition from GD access model. For 64bit, only
1018 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1019 .word 0x6666; rex64; call __tls_get_addr@PLT
1021 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1023 call *__tls_get_addr@GOTPCREL(%rip)
1024 which may be converted to
1025 addr32 call __tls_get_addr
1026 can transit to different access model. For 32bit, only
1027 leaq foo@tlsgd(%rip), %rdi
1028 .word 0x6666; rex64; call __tls_get_addr@PLT
1030 leaq foo@tlsgd(%rip), %rdi
1032 call *__tls_get_addr@GOTPCREL(%rip)
1033 which may be converted to
1034 addr32 call __tls_get_addr
1035 can transit to different access model. For largepic,
1037 leaq foo@tlsgd(%rip), %rdi
1038 movabsq $__tls_get_addr@pltoff, %rax
1042 leaq foo@tlsgd(%rip), %rdi
1043 movabsq $__tls_get_addr@pltoff, %rax
1047 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1049 if ((offset + 12) > sec->size)
1052 call = contents + offset + 4;
1054 || !((call[1] == 0x48
1062 && call[3] == 0xe8)))
1064 if (!ABI_64_P (abfd)
1065 || (offset + 19) > sec->size
1067 || memcmp (call - 7, leaq + 1, 3) != 0
1068 || memcmp (call, "\x48\xb8", 2) != 0
1072 || !((call[10] == 0x48 && call[12] == 0xd8)
1073 || (call[10] == 0x4c && call[12] == 0xf8)))
1077 else if (ABI_64_P (abfd))
1080 || memcmp (contents + offset - 4, leaq, 4) != 0)
1086 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
1089 indirect_call = call[2] == 0xff;
1093 /* Check transition from LD access model. Only
1094 leaq foo@tlsld(%rip), %rdi;
1095 call __tls_get_addr@PLT
1097 leaq foo@tlsld(%rip), %rdi;
1098 call *__tls_get_addr@GOTPCREL(%rip)
1099 which may be converted to
1100 addr32 call __tls_get_addr
1101 can transit to different access model. For largepic
1103 leaq foo@tlsld(%rip), %rdi
1104 movabsq $__tls_get_addr@pltoff, %rax
1108 leaq foo@tlsld(%rip), %rdi
1109 movabsq $__tls_get_addr@pltoff, %rax
1113 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
1115 if (offset < 3 || (offset + 9) > sec->size)
1118 if (memcmp (contents + offset - 3, lea, 3) != 0)
1121 call = contents + offset + 4;
1122 if (!(call[0] == 0xe8
1123 || (call[0] == 0xff && call[1] == 0x15)
1124 || (call[0] == 0x67 && call[1] == 0xe8)))
1126 if (!ABI_64_P (abfd)
1127 || (offset + 19) > sec->size
1128 || memcmp (call, "\x48\xb8", 2) != 0
1132 || !((call[10] == 0x48 && call[12] == 0xd8)
1133 || (call[10] == 0x4c && call[12] == 0xf8)))
1137 indirect_call = call[0] == 0xff;
1140 r_symndx = htab->r_sym (rel[1].r_info);
1141 if (r_symndx < symtab_hdr->sh_info)
1144 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1146 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
1149 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64;
1150 else if (indirect_call)
1151 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX;
1153 return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1154 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
1156 case R_X86_64_GOTTPOFF:
1157 /* Check transition from IE access model:
1158 mov foo@gottpoff(%rip), %reg
1159 add foo@gottpoff(%rip), %reg
1162 /* Check REX prefix first. */
1163 if (offset >= 3 && (offset + 4) <= sec->size)
1165 val = bfd_get_8 (abfd, contents + offset - 3);
1166 if (val != 0x48 && val != 0x4c)
1168 /* X32 may have 0x44 REX prefix or no REX prefix. */
1169 if (ABI_64_P (abfd))
1175 /* X32 may not have any REX prefix. */
1176 if (ABI_64_P (abfd))
1178 if (offset < 2 || (offset + 3) > sec->size)
1182 val = bfd_get_8 (abfd, contents + offset - 2);
1183 if (val != 0x8b && val != 0x03)
1186 val = bfd_get_8 (abfd, contents + offset - 1);
1187 return (val & 0xc7) == 5;
1189 case R_X86_64_GOTPC32_TLSDESC:
1190 /* Check transition from GDesc access model:
1191 leaq x@tlsdesc(%rip), %rax
1193 Make sure it's a leaq adding rip to a 32-bit offset
1194 into any register, although it's probably almost always
1197 if (offset < 3 || (offset + 4) > sec->size)
1200 val = bfd_get_8 (abfd, contents + offset - 3);
1201 if ((val & 0xfb) != 0x48)
1204 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1207 val = bfd_get_8 (abfd, contents + offset - 1);
1208 return (val & 0xc7) == 0x05;
1210 case R_X86_64_TLSDESC_CALL:
1211 /* Check transition from GDesc access model:
1212 call *x@tlsdesc(%rax)
1214 if (offset + 2 <= sec->size)
1216 /* Make sure that it's a call *x@tlsdesc(%rax). */
1217 call = contents + offset;
1218 return call[0] == 0xff && call[1] == 0x10;
1228 /* Return TRUE if the TLS access transition is OK or no transition
1229 will be performed. Update R_TYPE if there is a transition. */
1232 elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1233 asection *sec, bfd_byte *contents,
1234 Elf_Internal_Shdr *symtab_hdr,
1235 struct elf_link_hash_entry **sym_hashes,
1236 unsigned int *r_type, int tls_type,
1237 const Elf_Internal_Rela *rel,
1238 const Elf_Internal_Rela *relend,
1239 struct elf_link_hash_entry *h,
1240 unsigned long r_symndx,
1241 bfd_boolean from_relocate_section)
1243 unsigned int from_type = *r_type;
1244 unsigned int to_type = from_type;
1245 bfd_boolean check = TRUE;
1247 /* Skip TLS transition for functions. */
1249 && (h->type == STT_FUNC
1250 || h->type == STT_GNU_IFUNC))
1255 case R_X86_64_TLSGD:
1256 case R_X86_64_GOTPC32_TLSDESC:
1257 case R_X86_64_TLSDESC_CALL:
1258 case R_X86_64_GOTTPOFF:
1259 if (bfd_link_executable (info))
1262 to_type = R_X86_64_TPOFF32;
1264 to_type = R_X86_64_GOTTPOFF;
1267 /* When we are called from elf_x86_64_relocate_section, there may
1268 be additional transitions based on TLS_TYPE. */
1269 if (from_relocate_section)
1271 unsigned int new_to_type = to_type;
1273 if (bfd_link_executable (info)
1276 && tls_type == GOT_TLS_IE)
1277 new_to_type = R_X86_64_TPOFF32;
1279 if (to_type == R_X86_64_TLSGD
1280 || to_type == R_X86_64_GOTPC32_TLSDESC
1281 || to_type == R_X86_64_TLSDESC_CALL)
1283 if (tls_type == GOT_TLS_IE)
1284 new_to_type = R_X86_64_GOTTPOFF;
1287 /* We checked the transition before when we were called from
1288 elf_x86_64_check_relocs. We only want to check the new
1289 transition which hasn't been checked before. */
1290 check = new_to_type != to_type && from_type == to_type;
1291 to_type = new_to_type;
1296 case R_X86_64_TLSLD:
1297 if (bfd_link_executable (info))
1298 to_type = R_X86_64_TPOFF32;
1305 /* Return TRUE if there is no transition. */
1306 if (from_type == to_type)
1309 /* Check if the transition can be performed. */
1311 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1312 symtab_hdr, sym_hashes,
1313 from_type, rel, relend))
1315 reloc_howto_type *from, *to;
1318 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1319 to = elf_x86_64_rtype_to_howto (abfd, to_type);
1322 name = h->root.root.string;
1325 struct elf_x86_link_hash_table *htab;
1327 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
1332 Elf_Internal_Sym *isym;
1334 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1336 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1341 /* xgettext:c-format */
1342 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1343 "in section `%A' failed"),
1344 abfd, from->name, to->name, name, rel->r_offset, sec);
1345 bfd_set_error (bfd_error_bad_value);
1353 /* Rename some of the generic section flags to better document how they
1355 #define need_convert_load sec_flg0
1356 #define check_relocs_failed sec_flg1
1359 elf_x86_64_need_pic (struct bfd_link_info *info,
1360 bfd *input_bfd, asection *sec,
1361 struct elf_link_hash_entry *h,
1362 Elf_Internal_Shdr *symtab_hdr,
1363 Elf_Internal_Sym *isym,
1364 reloc_howto_type *howto)
1367 const char *und = "";
1368 const char *pic = "";
1374 name = h->root.root.string;
1375 switch (ELF_ST_VISIBILITY (h->other))
1378 v = _("hidden symbol ");
1381 v = _("internal symbol ");
1384 v = _("protected symbol ");
1387 if (((struct elf_x86_link_hash_entry *) h)->def_protected)
1388 v = _("protected symbol ");
1391 pic = _("; recompile with -fPIC");
1395 if (!h->def_regular && !h->def_dynamic)
1396 und = _("undefined ");
1400 name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL);
1401 pic = _("; recompile with -fPIC");
1404 if (bfd_link_dll (info))
1405 object = _("a shared object");
1406 else if (bfd_link_pie (info))
1407 object = _("a PIE object");
1409 object = _("a PDE object");
1411 /* xgettext:c-format */
1412 _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can "
1413 "not be used when making %s%s"),
1414 input_bfd, howto->name, und, v, name,
1416 bfd_set_error (bfd_error_bad_value);
1417 sec->check_relocs_failed = 1;
1421 /* With the local symbol, foo, we convert
1422 mov foo@GOTPCREL(%rip), %reg
1426 call/jmp *foo@GOTPCREL(%rip)
1428 nop call foo/jmp foo nop
1429 When PIC is false, convert
1430 test %reg, foo@GOTPCREL(%rip)
1434 binop foo@GOTPCREL(%rip), %reg
1437 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1441 elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec,
1443 Elf_Internal_Rela *irel,
1444 struct elf_link_hash_entry *h,
1445 bfd_boolean *converted,
1446 struct bfd_link_info *link_info)
1448 struct elf_x86_link_hash_table *htab;
1450 bfd_boolean require_reloc_pc32;
1452 bfd_boolean to_reloc_pc32;
1455 bfd_signed_vma raddend;
1456 unsigned int opcode;
1458 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
1459 unsigned int r_symndx;
1461 bfd_vma roff = irel->r_offset;
1463 if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))
1466 raddend = irel->r_addend;
1467 /* Addend for 32-bit PC-relative relocation must be -4. */
1471 htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA);
1472 is_pic = bfd_link_pic (link_info);
1474 relocx = (r_type == R_X86_64_GOTPCRELX
1475 || r_type == R_X86_64_REX_GOTPCRELX);
1477 /* TRUE if we can convert only to R_X86_64_PC32. Enable it for
1480 = link_info->disable_target_specific_optimizations > 1;
1482 r_symndx = htab->r_sym (irel->r_info);
1484 opcode = bfd_get_8 (abfd, contents + roff - 2);
1486 /* Convert mov to lea since it has been done for a while. */
1489 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
1490 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
1491 test, xor instructions. */
1496 /* We convert only to R_X86_64_PC32:
1498 2. R_X86_64_GOTPCREL since we can't modify REX byte.
1499 3. require_reloc_pc32 is true.
1502 to_reloc_pc32 = (opcode == 0xff
1504 || require_reloc_pc32
1507 /* Get the symbol referred to by the reloc. */
1510 Elf_Internal_Sym *isym
1511 = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx);
1513 /* Skip relocation against undefined symbols. */
1514 if (isym->st_shndx == SHN_UNDEF)
1517 symtype = ELF_ST_TYPE (isym->st_info);
1519 if (isym->st_shndx == SHN_ABS)
1520 tsec = bfd_abs_section_ptr;
1521 else if (isym->st_shndx == SHN_COMMON)
1522 tsec = bfd_com_section_ptr;
1523 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
1524 tsec = &_bfd_elf_large_com_section;
1526 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1528 toff = isym->st_value;
1532 /* Undefined weak symbol is only bound locally in executable
1533 and its reference is resolved as 0 without relocation
1534 overflow. We can only perform this optimization for
1535 GOTPCRELX relocations since we need to modify REX byte.
1536 It is OK convert mov with R_X86_64_GOTPCREL to
1538 if ((relocx || opcode == 0x8b)
1539 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info,
1542 elf_x86_hash_entry (h)))
1546 /* Skip for branch instructions since R_X86_64_PC32
1548 if (require_reloc_pc32)
1553 /* For non-branch instructions, we can convert to
1554 R_X86_64_32/R_X86_64_32S since we know if there
1556 to_reloc_pc32 = FALSE;
1559 /* Since we don't know the current PC when PIC is true,
1560 we can't convert to R_X86_64_PC32. */
1561 if (to_reloc_pc32 && is_pic)
1566 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
1567 ld.so may use its link-time address. */
1568 else if (h->start_stop
1570 || h->root.type == bfd_link_hash_defined
1571 || h->root.type == bfd_link_hash_defweak)
1572 && h != htab->elf.hdynamic
1573 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
1575 /* bfd_link_hash_new or bfd_link_hash_undefined is
1576 set by an assignment in a linker script in
1577 bfd_elf_record_link_assignment. start_stop is set
1578 on __start_SECNAME/__stop_SECNAME which mark section
1582 && (h->root.type == bfd_link_hash_new
1583 || h->root.type == bfd_link_hash_undefined
1584 || ((h->root.type == bfd_link_hash_defined
1585 || h->root.type == bfd_link_hash_defweak)
1586 && h->root.u.def.section == bfd_und_section_ptr))))
1588 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
1589 if (require_reloc_pc32)
1593 tsec = h->root.u.def.section;
1594 toff = h->root.u.def.value;
1601 /* Don't convert GOTPCREL relocation against large section. */
1602 if (elf_section_data (tsec) != NULL
1603 && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0)
1606 /* We can only estimate relocation overflow for R_X86_64_PC32. */
1610 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
1612 /* At this stage in linking, no SEC_MERGE symbol has been
1613 adjusted, so all references to such symbols need to be
1614 passed through _bfd_merged_section_offset. (Later, in
1615 relocate_section, all SEC_MERGE symbols *except* for
1616 section symbols have been adjusted.)
1618 gas may reduce relocations against symbols in SEC_MERGE
1619 sections to a relocation against the section symbol when
1620 the original addend was zero. When the reloc is against
1621 a section symbol we should include the addend in the
1622 offset passed to _bfd_merged_section_offset, since the
1623 location of interest is the original symbol. On the
1624 other hand, an access to "sym+addend" where "sym" is not
1625 a section symbol should not include the addend; Such an
1626 access is presumed to be an offset from "sym"; The
1627 location of interest is just "sym". */
1628 if (symtype == STT_SECTION)
1631 toff = _bfd_merged_section_offset (abfd, &tsec,
1632 elf_section_data (tsec)->sec_info,
1635 if (symtype != STT_SECTION)
1641 /* Don't convert if R_X86_64_PC32 relocation overflows. */
1642 if (tsec->output_section == sec->output_section)
1644 if ((toff - roff + 0x80000000) > 0xffffffff)
1649 bfd_signed_vma distance;
1651 /* At this point, we don't know the load addresses of TSEC
1652 section nor SEC section. We estimate the distrance between
1653 SEC and TSEC. We store the estimated distances in the
1654 compressed_size field of the output section, which is only
1655 used to decompress the compressed input section. */
1656 if (sec->output_section->compressed_size == 0)
1659 bfd_size_type size = 0;
1660 for (asect = link_info->output_bfd->sections;
1662 asect = asect->next)
1663 /* Skip debug sections since compressed_size is used to
1664 compress debug sections. */
1665 if ((asect->flags & SEC_DEBUGGING) == 0)
1668 for (i = asect->map_head.s;
1672 size = align_power (size, i->alignment_power);
1675 asect->compressed_size = size;
1679 /* Don't convert GOTPCREL relocations if TSEC isn't placed
1681 distance = (tsec->output_section->compressed_size
1682 - sec->output_section->compressed_size);
1686 /* Take PT_GNU_RELRO segment into account by adding
1688 if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize
1689 - roff + 0x80000000) > 0xffffffff)
1696 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
1701 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
1703 modrm = bfd_get_8 (abfd, contents + roff - 1);
1706 /* Convert to "jmp foo nop". */
1709 nop_offset = irel->r_offset + 3;
1710 disp = bfd_get_32 (abfd, contents + irel->r_offset);
1711 irel->r_offset -= 1;
1712 bfd_put_32 (abfd, disp, contents + irel->r_offset);
1716 struct elf_x86_link_hash_entry *eh
1717 = (struct elf_x86_link_hash_entry *) h;
1719 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1722 /* To support TLS optimization, always use addr32 prefix for
1723 "call *__tls_get_addr@GOTPCREL(%rip)". */
1724 if (eh && eh->tls_get_addr)
1727 nop_offset = irel->r_offset - 2;
1731 nop = link_info->call_nop_byte;
1732 if (link_info->call_nop_as_suffix)
1734 nop_offset = irel->r_offset + 3;
1735 disp = bfd_get_32 (abfd, contents + irel->r_offset);
1736 irel->r_offset -= 1;
1737 bfd_put_32 (abfd, disp, contents + irel->r_offset);
1740 nop_offset = irel->r_offset - 2;
1743 bfd_put_8 (abfd, nop, contents + nop_offset);
1744 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1745 r_type = R_X86_64_PC32;
1750 unsigned int rex_mask = REX_R;
1752 if (r_type == R_X86_64_REX_GOTPCRELX)
1753 rex = bfd_get_8 (abfd, contents + roff - 3);
1761 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1762 "lea foo(%rip), %reg". */
1764 r_type = R_X86_64_PC32;
1768 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1769 "mov $foo, %reg". */
1771 modrm = bfd_get_8 (abfd, contents + roff - 1);
1772 modrm = 0xc0 | (modrm & 0x38) >> 3;
1773 if ((rex & REX_W) != 0
1774 && ABI_64_P (link_info->output_bfd))
1776 /* Keep the REX_W bit in REX byte for LP64. */
1777 r_type = R_X86_64_32S;
1778 goto rewrite_modrm_rex;
1782 /* If the REX_W bit in REX byte isn't needed,
1783 use R_X86_64_32 and clear the W bit to avoid
1784 sign-extend imm32 to imm64. */
1785 r_type = R_X86_64_32;
1786 /* Clear the W bit in REX byte. */
1788 goto rewrite_modrm_rex;
1794 /* R_X86_64_PC32 isn't supported. */
1798 modrm = bfd_get_8 (abfd, contents + roff - 1);
1801 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
1802 "test $foo, %reg". */
1803 modrm = 0xc0 | (modrm & 0x38) >> 3;
1808 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
1809 "binop $foo, %reg". */
1810 modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c);
1814 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
1815 overflow when sign-extending imm32 to imm64. */
1816 r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32;
1819 bfd_put_8 (abfd, modrm, contents + roff - 1);
1823 /* Move the R bit to the B bit in REX byte. */
1824 rex = (rex & ~rex_mask) | (rex & REX_R) >> 2;
1825 bfd_put_8 (abfd, rex, contents + roff - 3);
1828 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
1832 bfd_put_8 (abfd, opcode, contents + roff - 2);
1835 irel->r_info = htab->r_info (r_symndx, r_type);
1842 /* Look through the relocs for a section during the first phase, and
1843 calculate needed space in the global offset table, procedure
1844 linkage table, and dynamic reloc sections. */
1847 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1849 const Elf_Internal_Rela *relocs)
1851 struct elf_x86_link_hash_table *htab;
1852 Elf_Internal_Shdr *symtab_hdr;
1853 struct elf_link_hash_entry **sym_hashes;
1854 const Elf_Internal_Rela *rel;
1855 const Elf_Internal_Rela *rel_end;
1859 if (bfd_link_relocatable (info))
1862 /* Don't do anything special with non-loaded, non-alloced sections.
1863 In particular, any relocs in such sections should not affect GOT
1864 and PLT reference counting (ie. we don't allow them to create GOT
1865 or PLT entries), there's no possibility or desire to optimize TLS
1866 relocs, and there's not much point in propagating relocs to shared
1867 libs that the dynamic linker won't relocate. */
1868 if ((sec->flags & SEC_ALLOC) == 0)
1871 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
1874 sec->check_relocs_failed = 1;
1878 BFD_ASSERT (is_x86_elf (abfd, htab));
1880 /* Get the section contents. */
1881 if (elf_section_data (sec)->this_hdr.contents != NULL)
1882 contents = elf_section_data (sec)->this_hdr.contents;
1883 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1885 sec->check_relocs_failed = 1;
1889 symtab_hdr = &elf_symtab_hdr (abfd);
1890 sym_hashes = elf_sym_hashes (abfd);
1894 rel_end = relocs + sec->reloc_count;
1895 for (rel = relocs; rel < rel_end; rel++)
1897 unsigned int r_type;
1898 unsigned int r_symndx;
1899 struct elf_link_hash_entry *h;
1900 struct elf_x86_link_hash_entry *eh;
1901 Elf_Internal_Sym *isym;
1903 bfd_boolean size_reloc;
1905 r_symndx = htab->r_sym (rel->r_info);
1906 r_type = ELF32_R_TYPE (rel->r_info);
1908 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1910 /* xgettext:c-format */
1911 _bfd_error_handler (_("%B: bad symbol index: %d"),
1916 if (r_symndx < symtab_hdr->sh_info)
1918 /* A local symbol. */
1919 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1924 /* Check relocation against local STT_GNU_IFUNC symbol. */
1925 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1927 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel,
1932 /* Fake a STT_GNU_IFUNC symbol. */
1933 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1935 h->type = STT_GNU_IFUNC;
1938 h->forced_local = 1;
1939 h->root.type = bfd_link_hash_defined;
1947 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1948 while (h->root.type == bfd_link_hash_indirect
1949 || h->root.type == bfd_link_hash_warning)
1950 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1953 /* Check invalid x32 relocations. */
1954 if (!ABI_64_P (abfd))
1960 case R_X86_64_DTPOFF64:
1961 case R_X86_64_TPOFF64:
1963 case R_X86_64_GOTOFF64:
1964 case R_X86_64_GOT64:
1965 case R_X86_64_GOTPCREL64:
1966 case R_X86_64_GOTPC64:
1967 case R_X86_64_GOTPLT64:
1968 case R_X86_64_PLTOFF64:
1971 name = h->root.root.string;
1973 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1976 /* xgettext:c-format */
1977 (_("%B: relocation %s against symbol `%s' isn't "
1978 "supported in x32 mode"), abfd,
1979 x86_64_elf_howto_table[r_type].name, name);
1980 bfd_set_error (bfd_error_bad_value);
1988 /* It is referenced by a non-shared object. */
1990 h->root.non_ir_ref_regular = 1;
1992 if (h->type == STT_GNU_IFUNC)
1993 elf_tdata (info->output_bfd)->has_gnu_symbols
1994 |= elf_gnu_symbol_ifunc;
1997 if (! elf_x86_64_tls_transition (info, abfd, sec, contents,
1998 symtab_hdr, sym_hashes,
1999 &r_type, GOT_UNKNOWN,
2000 rel, rel_end, h, r_symndx, FALSE))
2003 eh = (struct elf_x86_link_hash_entry *) h;
2006 case R_X86_64_TLSLD:
2007 htab->tls_ld_or_ldm_got.refcount += 1;
2010 case R_X86_64_TPOFF32:
2011 if (!bfd_link_executable (info) && ABI_64_P (abfd))
2012 return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym,
2013 &x86_64_elf_howto_table[r_type]);
2015 eh->has_got_reloc = 1;
2018 case R_X86_64_GOTTPOFF:
2019 if (!bfd_link_executable (info))
2020 info->flags |= DF_STATIC_TLS;
2023 case R_X86_64_GOT32:
2024 case R_X86_64_GOTPCREL:
2025 case R_X86_64_GOTPCRELX:
2026 case R_X86_64_REX_GOTPCRELX:
2027 case R_X86_64_TLSGD:
2028 case R_X86_64_GOT64:
2029 case R_X86_64_GOTPCREL64:
2030 case R_X86_64_GOTPLT64:
2031 case R_X86_64_GOTPC32_TLSDESC:
2032 case R_X86_64_TLSDESC_CALL:
2033 /* This symbol requires a global offset table entry. */
2035 int tls_type, old_tls_type;
2039 default: tls_type = GOT_NORMAL; break;
2040 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
2041 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
2042 case R_X86_64_GOTPC32_TLSDESC:
2043 case R_X86_64_TLSDESC_CALL:
2044 tls_type = GOT_TLS_GDESC; break;
2049 h->got.refcount += 1;
2050 old_tls_type = eh->tls_type;
2054 bfd_signed_vma *local_got_refcounts;
2056 /* This is a global offset table entry for a local symbol. */
2057 local_got_refcounts = elf_local_got_refcounts (abfd);
2058 if (local_got_refcounts == NULL)
2062 size = symtab_hdr->sh_info;
2063 size *= sizeof (bfd_signed_vma)
2064 + sizeof (bfd_vma) + sizeof (char);
2065 local_got_refcounts = ((bfd_signed_vma *)
2066 bfd_zalloc (abfd, size));
2067 if (local_got_refcounts == NULL)
2069 elf_local_got_refcounts (abfd) = local_got_refcounts;
2070 elf_x86_local_tlsdesc_gotent (abfd)
2071 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2072 elf_x86_local_got_tls_type (abfd)
2073 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2075 local_got_refcounts[r_symndx] += 1;
2077 = elf_x86_local_got_tls_type (abfd) [r_symndx];
2080 /* If a TLS symbol is accessed using IE at least once,
2081 there is no point to use dynamic model for it. */
2082 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2083 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2084 || tls_type != GOT_TLS_IE))
2086 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
2087 tls_type = old_tls_type;
2088 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2089 && GOT_TLS_GD_ANY_P (tls_type))
2090 tls_type |= old_tls_type;
2094 name = h->root.root.string;
2096 name = bfd_elf_sym_name (abfd, symtab_hdr,
2099 /* xgettext:c-format */
2100 (_("%B: '%s' accessed both as normal and"
2101 " thread local symbol"),
2103 bfd_set_error (bfd_error_bad_value);
2108 if (old_tls_type != tls_type)
2111 eh->tls_type = tls_type;
2113 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
2118 case R_X86_64_GOTOFF64:
2119 case R_X86_64_GOTPC32:
2120 case R_X86_64_GOTPC64:
2123 eh->has_got_reloc = 1;
2126 case R_X86_64_PLT32:
2127 case R_X86_64_PLT32_BND:
2128 /* This symbol requires a procedure linkage table entry. We
2129 actually build the entry in adjust_dynamic_symbol,
2130 because this might be a case of linking PIC code which is
2131 never referenced by a dynamic object, in which case we
2132 don't need to generate a procedure linkage table entry
2135 /* If this is a local symbol, we resolve it directly without
2136 creating a procedure linkage table entry. */
2140 eh->has_got_reloc = 1;
2142 h->plt.refcount += 1;
2145 case R_X86_64_PLTOFF64:
2146 /* This tries to form the 'address' of a function relative
2147 to GOT. For global symbols we need a PLT entry. */
2151 h->plt.refcount += 1;
2155 case R_X86_64_SIZE32:
2156 case R_X86_64_SIZE64:
2161 if (!ABI_64_P (abfd))
2167 /* Check relocation overflow as these relocs may lead to
2168 run-time relocation overflow. Don't error out for
2169 sections we don't care about, such as debug sections or
2170 when relocation overflow check is disabled. */
2171 if (!info->no_reloc_overflow_check
2172 && (bfd_link_pic (info)
2173 || (bfd_link_executable (info)
2177 && (sec->flags & SEC_READONLY) == 0)))
2178 return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym,
2179 &x86_64_elf_howto_table[r_type]);
2185 case R_X86_64_PC32_BND:
2189 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2190 eh->has_non_got_reloc = 1;
2191 /* We are called after all symbols have been resolved. Only
2192 relocation against STT_GNU_IFUNC symbol must go through
2195 && (bfd_link_executable (info)
2196 || h->type == STT_GNU_IFUNC))
2198 /* If this reloc is in a read-only section, we might
2199 need a copy reloc. We can't check reliably at this
2200 stage whether the section is read-only, as input
2201 sections have not yet been mapped to output sections.
2202 Tentatively set the flag for now, and correct in
2203 adjust_dynamic_symbol. */
2206 /* We may need a .plt entry if the symbol is a function
2207 defined in a shared lib or is a STT_GNU_IFUNC function
2208 referenced from the code or read-only section. */
2210 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
2211 h->plt.refcount += 1;
2213 if (r_type == R_X86_64_PC32)
2215 /* Since something like ".long foo - ." may be used
2216 as pointer, make sure that PLT is used if foo is
2217 a function defined in a shared library. */
2218 if ((sec->flags & SEC_CODE) == 0)
2219 h->pointer_equality_needed = 1;
2221 else if (r_type != R_X86_64_PC32_BND
2222 && r_type != R_X86_64_PC64)
2224 h->pointer_equality_needed = 1;
2225 /* At run-time, R_X86_64_64 can be resolved for both
2226 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2227 can only be resolved for x32. */
2228 if ((sec->flags & SEC_READONLY) == 0
2229 && (r_type == R_X86_64_64
2230 || (!ABI_64_P (abfd)
2231 && (r_type == R_X86_64_32
2232 || r_type == R_X86_64_32S))))
2233 eh->func_pointer_refcount += 1;
2239 /* If we are creating a shared library, and this is a reloc
2240 against a global symbol, or a non PC relative reloc
2241 against a local symbol, then we need to copy the reloc
2242 into the shared library. However, if we are linking with
2243 -Bsymbolic, we do not need to copy a reloc against a
2244 global symbol which is defined in an object we are
2245 including in the link (i.e., DEF_REGULAR is set). At
2246 this point we have not seen all the input files, so it is
2247 possible that DEF_REGULAR is not set now but will be set
2248 later (it is never cleared). In case of a weak definition,
2249 DEF_REGULAR may be cleared later by a strong definition in
2250 a shared library. We account for that possibility below by
2251 storing information in the relocs_copied field of the hash
2252 table entry. A similar situation occurs when creating
2253 shared libraries and symbol visibility changes render the
2256 If on the other hand, we are creating an executable, we
2257 may need to keep relocations for symbols satisfied by a
2258 dynamic library if we manage to avoid copy relocs for the
2261 Generate dynamic pointer relocation against STT_GNU_IFUNC
2262 symbol in the non-code section. */
2263 if ((bfd_link_pic (info)
2264 && (! IS_X86_64_PCREL_TYPE (r_type)
2266 && (! (bfd_link_pie (info)
2267 || SYMBOLIC_BIND (info, h))
2268 || h->root.type == bfd_link_hash_defweak
2269 || !h->def_regular))))
2271 && h->type == STT_GNU_IFUNC
2272 && r_type == htab->pointer_r_type
2273 && (sec->flags & SEC_CODE) == 0)
2274 || (ELIMINATE_COPY_RELOCS
2275 && !bfd_link_pic (info)
2277 && (h->root.type == bfd_link_hash_defweak
2278 || !h->def_regular)))
2280 struct elf_dyn_relocs *p;
2281 struct elf_dyn_relocs **head;
2283 /* We must copy these reloc types into the output file.
2284 Create a reloc section in dynobj and make room for
2288 sreloc = _bfd_elf_make_dynamic_reloc_section
2289 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
2290 abfd, /*rela?*/ TRUE);
2296 /* If this is a global symbol, we count the number of
2297 relocations we need for this symbol. */
2299 head = &eh->dyn_relocs;
2302 /* Track dynamic relocs needed for local syms too.
2303 We really need local syms available to do this
2308 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2313 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2317 /* Beware of type punned pointers vs strict aliasing
2319 vpp = &(elf_section_data (s)->local_dynrel);
2320 head = (struct elf_dyn_relocs **)vpp;
2324 if (p == NULL || p->sec != sec)
2326 bfd_size_type amt = sizeof *p;
2328 p = ((struct elf_dyn_relocs *)
2329 bfd_alloc (htab->elf.dynobj, amt));
2340 /* Count size relocation as PC-relative relocation. */
2341 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
2346 /* This relocation describes the C++ object vtable hierarchy.
2347 Reconstruct it for later use during GC. */
2348 case R_X86_64_GNU_VTINHERIT:
2349 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2353 /* This relocation describes which C++ vtable entries are actually
2354 used. Record for later use during GC. */
2355 case R_X86_64_GNU_VTENTRY:
2356 BFD_ASSERT (h != NULL);
2358 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2366 if ((r_type == R_X86_64_GOTPCREL
2367 || r_type == R_X86_64_GOTPCRELX
2368 || r_type == R_X86_64_REX_GOTPCRELX)
2369 && (h == NULL || h->type != STT_GNU_IFUNC))
2370 sec->need_convert_load = 1;
2373 if (elf_section_data (sec)->this_hdr.contents != contents)
2375 if (!info->keep_memory)
2379 /* Cache the section contents for elf_link_input_bfd. */
2380 elf_section_data (sec)->this_hdr.contents = contents;
2387 if (elf_section_data (sec)->this_hdr.contents != contents)
2389 sec->check_relocs_failed = 1;
2393 /* Convert load via the GOT slot to load immediate. */
2396 _bfd_x86_64_elf_convert_load (bfd *abfd, asection *sec,
2397 struct bfd_link_info *link_info)
2399 Elf_Internal_Shdr *symtab_hdr;
2400 Elf_Internal_Rela *internal_relocs;
2401 Elf_Internal_Rela *irel, *irelend;
2403 struct elf_x86_link_hash_table *htab;
2404 bfd_boolean changed;
2405 bfd_signed_vma *local_got_refcounts;
2407 /* Don't even try to convert non-ELF outputs. */
2408 if (!is_elf_hash_table (link_info->hash))
2411 /* Nothing to do if there is no need or no output. */
2412 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2413 || sec->need_convert_load == 0
2414 || bfd_is_abs_section (sec->output_section))
2417 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2419 /* Load the relocations for this section. */
2420 internal_relocs = (_bfd_elf_link_read_relocs
2421 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2422 link_info->keep_memory));
2423 if (internal_relocs == NULL)
2427 htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA);
2428 local_got_refcounts = elf_local_got_refcounts (abfd);
2430 /* Get the section contents. */
2431 if (elf_section_data (sec)->this_hdr.contents != NULL)
2432 contents = elf_section_data (sec)->this_hdr.contents;
2435 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2439 irelend = internal_relocs + sec->reloc_count;
2440 for (irel = internal_relocs; irel < irelend; irel++)
2442 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2443 unsigned int r_symndx;
2444 struct elf_link_hash_entry *h;
2445 bfd_boolean converted;
2447 if (r_type != R_X86_64_GOTPCRELX
2448 && r_type != R_X86_64_REX_GOTPCRELX
2449 && r_type != R_X86_64_GOTPCREL)
2452 r_symndx = htab->r_sym (irel->r_info);
2453 if (r_symndx < symtab_hdr->sh_info)
2454 h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
2455 (const Elf_Internal_Rela *) irel,
2459 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
2460 while (h->root.type == bfd_link_hash_indirect
2461 || h->root.type == bfd_link_hash_warning)
2462 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2465 /* STT_GNU_IFUNC must keep GOTPCREL relocations. */
2466 if (h != NULL && h->type == STT_GNU_IFUNC)
2470 if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h,
2471 &converted, link_info))
2476 changed = converted;
2479 if (h->got.refcount > 0)
2480 h->got.refcount -= 1;
2484 if (local_got_refcounts != NULL
2485 && local_got_refcounts[r_symndx] > 0)
2486 local_got_refcounts[r_symndx] -= 1;
2491 if (contents != NULL
2492 && elf_section_data (sec)->this_hdr.contents != contents)
2494 if (!changed && !link_info->keep_memory)
2498 /* Cache the section contents for elf_link_input_bfd. */
2499 elf_section_data (sec)->this_hdr.contents = contents;
2503 if (elf_section_data (sec)->relocs != internal_relocs)
2506 free (internal_relocs);
2508 elf_section_data (sec)->relocs = internal_relocs;
2514 if (contents != NULL
2515 && elf_section_data (sec)->this_hdr.contents != contents)
2517 if (internal_relocs != NULL
2518 && elf_section_data (sec)->relocs != internal_relocs)
2519 free (internal_relocs);
2523 /* Return the relocation value for @tpoff relocation
2524 if STT_TLS virtual address is ADDRESS. */
2527 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
2529 struct elf_link_hash_table *htab = elf_hash_table (info);
2530 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2531 bfd_vma static_tls_size;
2533 /* If tls_segment is NULL, we should have signalled an error already. */
2534 if (htab->tls_sec == NULL)
2537 /* Consider special static TLS alignment requirements. */
2538 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2539 return address - static_tls_size - htab->tls_sec->vma;
2542 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
2546 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
2548 /* Opcode Instruction
2551 0x0f 0x8x conditional jump */
2553 && (contents [offset - 1] == 0xe8
2554 || contents [offset - 1] == 0xe9))
2556 && contents [offset - 2] == 0x0f
2557 && (contents [offset - 1] & 0xf0) == 0x80));
2560 /* Relocate an x86_64 ELF section. */
2563 elf_x86_64_relocate_section (bfd *output_bfd,
2564 struct bfd_link_info *info,
2566 asection *input_section,
2568 Elf_Internal_Rela *relocs,
2569 Elf_Internal_Sym *local_syms,
2570 asection **local_sections)
2572 struct elf_x86_link_hash_table *htab;
2573 Elf_Internal_Shdr *symtab_hdr;
2574 struct elf_link_hash_entry **sym_hashes;
2575 bfd_vma *local_got_offsets;
2576 bfd_vma *local_tlsdesc_gotents;
2577 Elf_Internal_Rela *rel;
2578 Elf_Internal_Rela *wrel;
2579 Elf_Internal_Rela *relend;
2580 unsigned int plt_entry_size;
2582 /* Skip if check_relocs failed. */
2583 if (input_section->check_relocs_failed)
2586 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
2590 BFD_ASSERT (is_x86_elf (input_bfd, htab));
2592 plt_entry_size = htab->plt.plt_entry_size;
2593 symtab_hdr = &elf_symtab_hdr (input_bfd);
2594 sym_hashes = elf_sym_hashes (input_bfd);
2595 local_got_offsets = elf_local_got_offsets (input_bfd);
2596 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
2598 _bfd_x86_elf_set_tls_module_base (info);
2600 rel = wrel = relocs;
2601 relend = relocs + input_section->reloc_count;
2602 for (; rel < relend; wrel++, rel++)
2604 unsigned int r_type;
2605 reloc_howto_type *howto;
2606 unsigned long r_symndx;
2607 struct elf_link_hash_entry *h;
2608 struct elf_x86_link_hash_entry *eh;
2609 Elf_Internal_Sym *sym;
2611 bfd_vma off, offplt, plt_offset;
2613 bfd_boolean unresolved_reloc;
2614 bfd_reloc_status_type r;
2616 asection *base_got, *resolved_plt;
2618 bfd_boolean resolved_to_zero;
2619 bfd_boolean relative_reloc;
2621 r_type = ELF32_R_TYPE (rel->r_info);
2622 if (r_type == (int) R_X86_64_GNU_VTINHERIT
2623 || r_type == (int) R_X86_64_GNU_VTENTRY)
2630 if (r_type >= (int) R_X86_64_standard)
2631 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2633 if (r_type != (int) R_X86_64_32
2634 || ABI_64_P (output_bfd))
2635 howto = x86_64_elf_howto_table + r_type;
2637 howto = (x86_64_elf_howto_table
2638 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
2639 r_symndx = htab->r_sym (rel->r_info);
2643 unresolved_reloc = FALSE;
2644 if (r_symndx < symtab_hdr->sh_info)
2646 sym = local_syms + r_symndx;
2647 sec = local_sections[r_symndx];
2649 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
2651 st_size = sym->st_size;
2653 /* Relocate against local STT_GNU_IFUNC symbol. */
2654 if (!bfd_link_relocatable (info)
2655 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2657 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd,
2662 /* Set STT_GNU_IFUNC symbol value. */
2663 h->root.u.def.value = sym->st_value;
2664 h->root.u.def.section = sec;
2669 bfd_boolean warned ATTRIBUTE_UNUSED;
2670 bfd_boolean ignored ATTRIBUTE_UNUSED;
2672 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2673 r_symndx, symtab_hdr, sym_hashes,
2675 unresolved_reloc, warned, ignored);
2679 if (sec != NULL && discarded_section (sec))
2681 _bfd_clear_contents (howto, input_bfd, input_section,
2682 contents + rel->r_offset);
2683 wrel->r_offset = rel->r_offset;
2687 /* For ld -r, remove relocations in debug sections against
2688 sections defined in discarded sections. Not done for
2689 eh_frame editing code expects to be present. */
2690 if (bfd_link_relocatable (info)
2691 && (input_section->flags & SEC_DEBUGGING))
2697 if (bfd_link_relocatable (info))
2704 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
2706 if (r_type == R_X86_64_64)
2708 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
2709 zero-extend it to 64bit if addend is zero. */
2710 r_type = R_X86_64_32;
2711 memset (contents + rel->r_offset + 4, 0, 4);
2713 else if (r_type == R_X86_64_SIZE64)
2715 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
2716 zero-extend it to 64bit if addend is zero. */
2717 r_type = R_X86_64_SIZE32;
2718 memset (contents + rel->r_offset + 4, 0, 4);
2722 eh = (struct elf_x86_link_hash_entry *) h;
2724 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2725 it here if it is defined in a non-shared object. */
2727 && h->type == STT_GNU_IFUNC
2733 if ((input_section->flags & SEC_ALLOC) == 0)
2735 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2736 sections because such sections are not SEC_ALLOC and
2737 thus ld.so will not process them. */
2738 if ((input_section->flags & SEC_DEBUGGING) != 0)
2748 case R_X86_64_GOTPCREL:
2749 case R_X86_64_GOTPCRELX:
2750 case R_X86_64_REX_GOTPCRELX:
2751 case R_X86_64_GOTPCREL64:
2752 base_got = htab->elf.sgot;
2753 off = h->got.offset;
2755 if (base_got == NULL)
2758 if (off == (bfd_vma) -1)
2760 /* We can't use h->got.offset here to save state, or
2761 even just remember the offset, as finish_dynamic_symbol
2762 would use that as offset into .got. */
2764 if (h->plt.offset == (bfd_vma) -1)
2767 if (htab->elf.splt != NULL)
2769 plt_index = (h->plt.offset / plt_entry_size
2770 - htab->plt.has_plt0);
2771 off = (plt_index + 3) * GOT_ENTRY_SIZE;
2772 base_got = htab->elf.sgotplt;
2776 plt_index = h->plt.offset / plt_entry_size;
2777 off = plt_index * GOT_ENTRY_SIZE;
2778 base_got = htab->elf.igotplt;
2781 if (h->dynindx == -1
2785 /* This references the local defitionion. We must
2786 initialize this entry in the global offset table.
2787 Since the offset must always be a multiple of 8,
2788 we use the least significant bit to record
2789 whether we have initialized it already.
2791 When doing a dynamic link, we create a .rela.got
2792 relocation entry to initialize the value. This
2793 is done in the finish_dynamic_symbol routine. */
2798 bfd_put_64 (output_bfd, relocation,
2799 base_got->contents + off);
2800 /* Note that this is harmless for the GOTPLT64
2801 case, as -1 | 1 still is -1. */
2807 relocation = (base_got->output_section->vma
2808 + base_got->output_offset + off);
2813 if (h->plt.offset == (bfd_vma) -1)
2815 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2816 if (r_type == htab->pointer_r_type
2817 && (input_section->flags & SEC_CODE) == 0)
2818 goto do_ifunc_pointer;
2819 goto bad_ifunc_reloc;
2822 /* STT_GNU_IFUNC symbol must go through PLT. */
2823 if (htab->elf.splt != NULL)
2825 if (htab->plt_second != NULL)
2827 resolved_plt = htab->plt_second;
2828 plt_offset = eh->plt_second.offset;
2832 resolved_plt = htab->elf.splt;
2833 plt_offset = h->plt.offset;
2838 resolved_plt = htab->elf.iplt;
2839 plt_offset = h->plt.offset;
2842 relocation = (resolved_plt->output_section->vma
2843 + resolved_plt->output_offset + plt_offset);
2849 if (h->root.root.string)
2850 name = h->root.root.string;
2852 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2855 /* xgettext:c-format */
2856 (_("%B: relocation %s against STT_GNU_IFUNC "
2857 "symbol `%s' isn't supported"), input_bfd,
2859 bfd_set_error (bfd_error_bad_value);
2863 if (bfd_link_pic (info))
2868 if (ABI_64_P (output_bfd))
2873 if (rel->r_addend != 0)
2875 if (h->root.root.string)
2876 name = h->root.root.string;
2878 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
2881 /* xgettext:c-format */
2882 (_("%B: relocation %s against STT_GNU_IFUNC "
2883 "symbol `%s' has non-zero addend: %Ld"),
2884 input_bfd, howto->name, name, rel->r_addend);
2885 bfd_set_error (bfd_error_bad_value);
2889 /* Generate dynamic relcoation only when there is a
2890 non-GOT reference in a shared object or there is no
2892 if ((bfd_link_pic (info) && h->non_got_ref)
2893 || h->plt.offset == (bfd_vma) -1)
2895 Elf_Internal_Rela outrel;
2898 /* Need a dynamic relocation to get the real function
2900 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2904 if (outrel.r_offset == (bfd_vma) -1
2905 || outrel.r_offset == (bfd_vma) -2)
2908 outrel.r_offset += (input_section->output_section->vma
2909 + input_section->output_offset);
2911 if (h->dynindx == -1
2913 || bfd_link_executable (info))
2915 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
2916 h->root.root.string,
2917 h->root.u.def.section->owner);
2919 /* This symbol is resolved locally. */
2920 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
2921 outrel.r_addend = (h->root.u.def.value
2922 + h->root.u.def.section->output_section->vma
2923 + h->root.u.def.section->output_offset);
2927 outrel.r_info = htab->r_info (h->dynindx, r_type);
2928 outrel.r_addend = 0;
2931 /* Dynamic relocations are stored in
2932 1. .rela.ifunc section in PIC object.
2933 2. .rela.got section in dynamic executable.
2934 3. .rela.iplt section in static executable. */
2935 if (bfd_link_pic (info))
2936 sreloc = htab->elf.irelifunc;
2937 else if (htab->elf.splt != NULL)
2938 sreloc = htab->elf.srelgot;
2940 sreloc = htab->elf.irelplt;
2941 elf_append_rela (output_bfd, sreloc, &outrel);
2943 /* If this reloc is against an external symbol, we
2944 do not want to fiddle with the addend. Otherwise,
2945 we need to include the symbol value so that it
2946 becomes an addend for the dynamic reloc. For an
2947 internal symbol, we have updated addend. */
2952 case R_X86_64_PC32_BND:
2954 case R_X86_64_PLT32:
2955 case R_X86_64_PLT32_BND:
2960 resolved_to_zero = (eh != NULL
2961 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2966 /* When generating a shared object, the relocations handled here are
2967 copied into the output file to be resolved at run time. */
2970 case R_X86_64_GOT32:
2971 case R_X86_64_GOT64:
2972 /* Relocation is to the entry for this symbol in the global
2974 case R_X86_64_GOTPCREL:
2975 case R_X86_64_GOTPCRELX:
2976 case R_X86_64_REX_GOTPCRELX:
2977 case R_X86_64_GOTPCREL64:
2978 /* Use global offset table entry as symbol value. */
2979 case R_X86_64_GOTPLT64:
2980 /* This is obsolete and treated the same as GOT64. */
2981 base_got = htab->elf.sgot;
2983 if (htab->elf.sgot == NULL)
2986 relative_reloc = FALSE;
2991 off = h->got.offset;
2993 && h->plt.offset != (bfd_vma)-1
2994 && off == (bfd_vma)-1)
2996 /* We can't use h->got.offset here to save
2997 state, or even just remember the offset, as
2998 finish_dynamic_symbol would use that as offset into
3000 bfd_vma plt_index = (h->plt.offset / plt_entry_size
3001 - htab->plt.has_plt0);
3002 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3003 base_got = htab->elf.sgotplt;
3006 dyn = htab->elf.dynamic_sections_created;
3008 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
3009 || (bfd_link_pic (info)
3010 && SYMBOL_REFERENCES_LOCAL (info, h))
3011 || (ELF_ST_VISIBILITY (h->other)
3012 && h->root.type == bfd_link_hash_undefweak))
3014 /* This is actually a static link, or it is a -Bsymbolic
3015 link and the symbol is defined locally, or the symbol
3016 was forced to be local because of a version file. We
3017 must initialize this entry in the global offset table.
3018 Since the offset must always be a multiple of 8, we
3019 use the least significant bit to record whether we
3020 have initialized it already.
3022 When doing a dynamic link, we create a .rela.got
3023 relocation entry to initialize the value. This is
3024 done in the finish_dynamic_symbol routine. */
3029 bfd_put_64 (output_bfd, relocation,
3030 base_got->contents + off);
3031 /* Note that this is harmless for the GOTPLT64 case,
3032 as -1 | 1 still is -1. */
3035 if (h->dynindx == -1
3037 && h->root.type != bfd_link_hash_undefweak
3038 && bfd_link_pic (info))
3040 /* If this symbol isn't dynamic in PIC,
3041 generate R_X86_64_RELATIVE here. */
3042 eh->no_finish_dynamic_symbol = 1;
3043 relative_reloc = TRUE;
3048 unresolved_reloc = FALSE;
3052 if (local_got_offsets == NULL)
3055 off = local_got_offsets[r_symndx];
3057 /* The offset must always be a multiple of 8. We use
3058 the least significant bit to record whether we have
3059 already generated the necessary reloc. */
3064 bfd_put_64 (output_bfd, relocation,
3065 base_got->contents + off);
3066 local_got_offsets[r_symndx] |= 1;
3068 if (bfd_link_pic (info))
3069 relative_reloc = TRUE;
3076 Elf_Internal_Rela outrel;
3078 /* We need to generate a R_X86_64_RELATIVE reloc
3079 for the dynamic linker. */
3080 s = htab->elf.srelgot;
3084 outrel.r_offset = (base_got->output_section->vma
3085 + base_got->output_offset
3087 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3088 outrel.r_addend = relocation;
3089 elf_append_rela (output_bfd, s, &outrel);
3092 if (off >= (bfd_vma) -2)
3095 relocation = base_got->output_section->vma
3096 + base_got->output_offset + off;
3097 if (r_type != R_X86_64_GOTPCREL
3098 && r_type != R_X86_64_GOTPCRELX
3099 && r_type != R_X86_64_REX_GOTPCRELX
3100 && r_type != R_X86_64_GOTPCREL64)
3101 relocation -= htab->elf.sgotplt->output_section->vma
3102 - htab->elf.sgotplt->output_offset;
3106 case R_X86_64_GOTOFF64:
3107 /* Relocation is relative to the start of the global offset
3110 /* Check to make sure it isn't a protected function or data
3111 symbol for shared library since it may not be local when
3112 used as function address or with copy relocation. We also
3113 need to make sure that a symbol is referenced locally. */
3114 if (bfd_link_pic (info) && h)
3116 if (!h->def_regular)
3120 switch (ELF_ST_VISIBILITY (h->other))
3123 v = _("hidden symbol");
3126 v = _("internal symbol");
3129 v = _("protected symbol");
3137 /* xgettext:c-format */
3138 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s"
3139 " `%s' can not be used when making a shared object"),
3140 input_bfd, v, h->root.root.string);
3141 bfd_set_error (bfd_error_bad_value);
3144 else if (!bfd_link_executable (info)
3145 && !SYMBOL_REFERENCES_LOCAL (info, h)
3146 && (h->type == STT_FUNC
3147 || h->type == STT_OBJECT)
3148 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3151 /* xgettext:c-format */
3152 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s"
3153 " `%s' can not be used when making a shared object"),
3155 h->type == STT_FUNC ? "function" : "data",
3156 h->root.root.string);
3157 bfd_set_error (bfd_error_bad_value);
3162 /* Note that sgot is not involved in this
3163 calculation. We always want the start of .got.plt. If we
3164 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3165 permitted by the ABI, we might have to change this
3167 relocation -= htab->elf.sgotplt->output_section->vma
3168 + htab->elf.sgotplt->output_offset;
3171 case R_X86_64_GOTPC32:
3172 case R_X86_64_GOTPC64:
3173 /* Use global offset table as symbol value. */
3174 relocation = htab->elf.sgotplt->output_section->vma
3175 + htab->elf.sgotplt->output_offset;
3176 unresolved_reloc = FALSE;
3179 case R_X86_64_PLTOFF64:
3180 /* Relocation is PLT entry relative to GOT. For local
3181 symbols it's the symbol itself relative to GOT. */
3183 /* See PLT32 handling. */
3184 && (h->plt.offset != (bfd_vma) -1
3185 || eh->plt_got.offset != (bfd_vma) -1)
3186 && htab->elf.splt != NULL)
3188 if (eh->plt_got.offset != (bfd_vma) -1)
3190 /* Use the GOT PLT. */
3191 resolved_plt = htab->plt_got;
3192 plt_offset = eh->plt_got.offset;
3194 else if (htab->plt_second != NULL)
3196 resolved_plt = htab->plt_second;
3197 plt_offset = eh->plt_second.offset;
3201 resolved_plt = htab->elf.splt;
3202 plt_offset = h->plt.offset;
3205 relocation = (resolved_plt->output_section->vma
3206 + resolved_plt->output_offset
3208 unresolved_reloc = FALSE;
3211 relocation -= htab->elf.sgotplt->output_section->vma
3212 + htab->elf.sgotplt->output_offset;
3215 case R_X86_64_PLT32:
3216 case R_X86_64_PLT32_BND:
3217 /* Relocation is to the entry for this symbol in the
3218 procedure linkage table. */
3220 /* Resolve a PLT32 reloc against a local symbol directly,
3221 without using the procedure linkage table. */
3225 if ((h->plt.offset == (bfd_vma) -1
3226 && eh->plt_got.offset == (bfd_vma) -1)
3227 || htab->elf.splt == NULL)
3229 /* We didn't make a PLT entry for this symbol. This
3230 happens when statically linking PIC code, or when
3231 using -Bsymbolic. */
3235 if (h->plt.offset != (bfd_vma) -1)
3237 if (htab->plt_second != NULL)
3239 resolved_plt = htab->plt_second;
3240 plt_offset = eh->plt_second.offset;
3244 resolved_plt = htab->elf.splt;
3245 plt_offset = h->plt.offset;
3250 /* Use the GOT PLT. */
3251 resolved_plt = htab->plt_got;
3252 plt_offset = eh->plt_got.offset;
3255 relocation = (resolved_plt->output_section->vma
3256 + resolved_plt->output_offset
3258 unresolved_reloc = FALSE;
3261 case R_X86_64_SIZE32:
3262 case R_X86_64_SIZE64:
3263 /* Set to symbol size. */
3264 relocation = st_size;
3270 case R_X86_64_PC32_BND:
3271 /* Don't complain about -fPIC if the symbol is undefined when
3272 building executable unless it is unresolved weak symbol or
3273 -z nocopyreloc is used. */
3274 if ((input_section->flags & SEC_ALLOC) != 0
3275 && (input_section->flags & SEC_READONLY) != 0
3277 && ((bfd_link_executable (info)
3278 && ((h->root.type == bfd_link_hash_undefweak
3279 && !resolved_to_zero)
3280 || ((info->nocopyreloc
3281 || (eh->def_protected
3282 && elf_has_no_copy_on_protected (h->root.u.def.section->owner)))
3284 && !(h->root.u.def.section->flags & SEC_CODE))))
3285 || bfd_link_dll (info)))
3287 bfd_boolean fail = FALSE;
3289 = ((r_type == R_X86_64_PC32
3290 || r_type == R_X86_64_PC32_BND)
3291 && is_32bit_relative_branch (contents, rel->r_offset));
3293 if (SYMBOL_REFERENCES_LOCAL (info, h))
3295 /* Symbol is referenced locally. Make sure it is
3296 defined locally or for a branch. */
3297 fail = (!(h->def_regular || ELF_COMMON_DEF_P (h))
3300 else if (!(bfd_link_pie (info)
3301 && (h->needs_copy || eh->needs_copy)))
3303 /* Symbol doesn't need copy reloc and isn't referenced
3304 locally. We only allow branch to symbol with
3305 non-default visibility. */
3307 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
3311 return elf_x86_64_need_pic (info, input_bfd, input_section,
3312 h, NULL, NULL, howto);
3321 /* FIXME: The ABI says the linker should make sure the value is
3322 the same when it's zeroextended to 64 bit. */
3325 if ((input_section->flags & SEC_ALLOC) == 0)
3328 /* Don't copy a pc-relative relocation into the output file
3329 if the symbol needs copy reloc or the symbol is undefined
3330 when building executable. Copy dynamic function pointer
3331 relocations. Don't generate dynamic relocations against
3332 resolved undefined weak symbols in PIE. */
3333 if ((bfd_link_pic (info)
3334 && !(bfd_link_pie (info)
3338 || h->root.type == bfd_link_hash_undefined)
3339 && (IS_X86_64_PCREL_TYPE (r_type)
3340 || r_type == R_X86_64_SIZE32
3341 || r_type == R_X86_64_SIZE64))
3343 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3344 && !resolved_to_zero)
3345 || h->root.type != bfd_link_hash_undefweak))
3346 && ((! IS_X86_64_PCREL_TYPE (r_type)
3347 && r_type != R_X86_64_SIZE32
3348 && r_type != R_X86_64_SIZE64)
3349 || ! SYMBOL_CALLS_LOCAL (info, h)))
3350 || (ELIMINATE_COPY_RELOCS
3351 && !bfd_link_pic (info)
3355 || eh->func_pointer_refcount > 0
3356 || (h->root.type == bfd_link_hash_undefweak
3357 && !resolved_to_zero))
3358 && ((h->def_dynamic && !h->def_regular)
3359 /* Undefined weak symbol is bound locally when
3361 || h->root.type == bfd_link_hash_undefined)))
3363 Elf_Internal_Rela outrel;
3364 bfd_boolean skip, relocate;
3367 /* When generating a shared object, these relocations
3368 are copied into the output file to be resolved at run
3374 _bfd_elf_section_offset (output_bfd, info, input_section,
3376 if (outrel.r_offset == (bfd_vma) -1)
3378 else if (outrel.r_offset == (bfd_vma) -2)
3379 skip = TRUE, relocate = TRUE;
3381 outrel.r_offset += (input_section->output_section->vma
3382 + input_section->output_offset);
3385 memset (&outrel, 0, sizeof outrel);
3387 /* h->dynindx may be -1 if this symbol was marked to
3391 && (IS_X86_64_PCREL_TYPE (r_type)
3392 || !(bfd_link_executable (info)
3393 || SYMBOLIC_BIND (info, h))
3394 || ! h->def_regular))
3396 outrel.r_info = htab->r_info (h->dynindx, r_type);
3397 outrel.r_addend = rel->r_addend;
3401 /* This symbol is local, or marked to become local.
3402 When relocation overflow check is disabled, we
3403 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
3404 if (r_type == htab->pointer_r_type
3405 || (r_type == R_X86_64_32
3406 && info->no_reloc_overflow_check))
3409 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3410 outrel.r_addend = relocation + rel->r_addend;
3412 else if (r_type == R_X86_64_64
3413 && !ABI_64_P (output_bfd))
3416 outrel.r_info = htab->r_info (0,
3417 R_X86_64_RELATIVE64);
3418 outrel.r_addend = relocation + rel->r_addend;
3419 /* Check addend overflow. */
3420 if ((outrel.r_addend & 0x80000000)
3421 != (rel->r_addend & 0x80000000))
3424 int addend = rel->r_addend;
3425 if (h && h->root.root.string)
3426 name = h->root.root.string;
3428 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3431 /* xgettext:c-format */
3432 (_("%B: addend %s%#x in relocation %s against "
3433 "symbol `%s' at %#Lx in section `%A' is "
3435 input_bfd, addend < 0 ? "-" : "", addend,
3436 howto->name, name, rel->r_offset, input_section);
3437 bfd_set_error (bfd_error_bad_value);
3445 if (bfd_is_abs_section (sec))
3447 else if (sec == NULL || sec->owner == NULL)
3449 bfd_set_error (bfd_error_bad_value);
3456 /* We are turning this relocation into one
3457 against a section symbol. It would be
3458 proper to subtract the symbol's value,
3459 osec->vma, from the emitted reloc addend,
3460 but ld.so expects buggy relocs. */
3461 osec = sec->output_section;
3462 sindx = elf_section_data (osec)->dynindx;
3465 asection *oi = htab->elf.text_index_section;
3466 sindx = elf_section_data (oi)->dynindx;
3468 BFD_ASSERT (sindx != 0);
3471 outrel.r_info = htab->r_info (sindx, r_type);
3472 outrel.r_addend = relocation + rel->r_addend;
3476 sreloc = elf_section_data (input_section)->sreloc;
3478 if (sreloc == NULL || sreloc->contents == NULL)
3480 r = bfd_reloc_notsupported;
3481 goto check_relocation_error;
3484 elf_append_rela (output_bfd, sreloc, &outrel);
3486 /* If this reloc is against an external symbol, we do
3487 not want to fiddle with the addend. Otherwise, we
3488 need to include the symbol value so that it becomes
3489 an addend for the dynamic reloc. */
3496 case R_X86_64_TLSGD:
3497 case R_X86_64_GOTPC32_TLSDESC:
3498 case R_X86_64_TLSDESC_CALL:
3499 case R_X86_64_GOTTPOFF:
3500 tls_type = GOT_UNKNOWN;
3501 if (h == NULL && local_got_offsets)
3502 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
3504 tls_type = elf_x86_hash_entry (h)->tls_type;
3506 if (! elf_x86_64_tls_transition (info, input_bfd,
3507 input_section, contents,
3508 symtab_hdr, sym_hashes,
3509 &r_type, tls_type, rel,
3510 relend, h, r_symndx, TRUE))
3513 if (r_type == R_X86_64_TPOFF32)
3515 bfd_vma roff = rel->r_offset;
3517 BFD_ASSERT (! unresolved_reloc);
3519 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
3521 /* GD->LE transition. For 64bit, change
3522 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3523 .word 0x6666; rex64; call __tls_get_addr@PLT
3525 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3527 call *__tls_get_addr@GOTPCREL(%rip)
3528 which may be converted to
3529 addr32 call __tls_get_addr
3532 leaq foo@tpoff(%rax), %rax
3534 leaq foo@tlsgd(%rip), %rdi
3535 .word 0x6666; rex64; call __tls_get_addr@PLT
3537 leaq foo@tlsgd(%rip), %rdi
3539 call *__tls_get_addr@GOTPCREL(%rip)
3540 which may be converted to
3541 addr32 call __tls_get_addr
3544 leaq foo@tpoff(%rax), %rax
3545 For largepic, change:
3546 leaq foo@tlsgd(%rip), %rdi
3547 movabsq $__tls_get_addr@pltoff, %rax
3552 leaq foo@tpoff(%rax), %rax
3553 nopw 0x0(%rax,%rax,1) */
3555 if (ABI_64_P (output_bfd))
3557 if (contents[roff + 5] == 0xb8)
3559 memcpy (contents + roff - 3,
3560 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
3561 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3565 memcpy (contents + roff - 4,
3566 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3570 memcpy (contents + roff - 3,
3571 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3573 bfd_put_32 (output_bfd,
3574 elf_x86_64_tpoff (info, relocation),
3575 contents + roff + 8 + largepic);
3576 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
3577 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
3582 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
3584 /* GDesc -> LE transition.
3585 It's originally something like:
3586 leaq x@tlsdesc(%rip), %rax
3589 movl $x@tpoff, %rax. */
3591 unsigned int val, type;
3593 type = bfd_get_8 (input_bfd, contents + roff - 3);
3594 val = bfd_get_8 (input_bfd, contents + roff - 1);
3595 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
3596 contents + roff - 3);
3597 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
3598 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3599 contents + roff - 1);
3600 bfd_put_32 (output_bfd,
3601 elf_x86_64_tpoff (info, relocation),
3605 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
3607 /* GDesc -> LE transition.
3612 bfd_put_8 (output_bfd, 0x66, contents + roff);
3613 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3616 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
3618 /* IE->LE transition:
3619 For 64bit, originally it can be one of:
3620 movq foo@gottpoff(%rip), %reg
3621 addq foo@gottpoff(%rip), %reg
3624 leaq foo(%reg), %reg
3626 For 32bit, originally it can be one of:
3627 movq foo@gottpoff(%rip), %reg
3628 addl foo@gottpoff(%rip), %reg
3631 leal foo(%reg), %reg
3634 unsigned int val, type, reg;
3637 val = bfd_get_8 (input_bfd, contents + roff - 3);
3640 type = bfd_get_8 (input_bfd, contents + roff - 2);
3641 reg = bfd_get_8 (input_bfd, contents + roff - 1);
3647 bfd_put_8 (output_bfd, 0x49,
3648 contents + roff - 3);
3649 else if (!ABI_64_P (output_bfd) && val == 0x44)
3650 bfd_put_8 (output_bfd, 0x41,
3651 contents + roff - 3);
3652 bfd_put_8 (output_bfd, 0xc7,
3653 contents + roff - 2);
3654 bfd_put_8 (output_bfd, 0xc0 | reg,
3655 contents + roff - 1);
3659 /* addq/addl -> addq/addl - addressing with %rsp/%r12
3662 bfd_put_8 (output_bfd, 0x49,
3663 contents + roff - 3);
3664 else if (!ABI_64_P (output_bfd) && val == 0x44)
3665 bfd_put_8 (output_bfd, 0x41,
3666 contents + roff - 3);
3667 bfd_put_8 (output_bfd, 0x81,
3668 contents + roff - 2);
3669 bfd_put_8 (output_bfd, 0xc0 | reg,
3670 contents + roff - 1);
3674 /* addq/addl -> leaq/leal */
3676 bfd_put_8 (output_bfd, 0x4d,
3677 contents + roff - 3);
3678 else if (!ABI_64_P (output_bfd) && val == 0x44)
3679 bfd_put_8 (output_bfd, 0x45,
3680 contents + roff - 3);
3681 bfd_put_8 (output_bfd, 0x8d,
3682 contents + roff - 2);
3683 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
3684 contents + roff - 1);
3686 bfd_put_32 (output_bfd,
3687 elf_x86_64_tpoff (info, relocation),
3695 if (htab->elf.sgot == NULL)
3700 off = h->got.offset;
3701 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
3705 if (local_got_offsets == NULL)
3708 off = local_got_offsets[r_symndx];
3709 offplt = local_tlsdesc_gotents[r_symndx];
3716 Elf_Internal_Rela outrel;
3720 if (htab->elf.srelgot == NULL)
3723 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3725 if (GOT_TLS_GDESC_P (tls_type))
3727 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
3728 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
3729 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
3730 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3731 + htab->elf.sgotplt->output_offset
3733 + htab->sgotplt_jump_table_size);
3734 sreloc = htab->elf.srelplt;
3736 outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info);
3738 outrel.r_addend = 0;
3739 elf_append_rela (output_bfd, sreloc, &outrel);
3742 sreloc = htab->elf.srelgot;
3744 outrel.r_offset = (htab->elf.sgot->output_section->vma
3745 + htab->elf.sgot->output_offset + off);
3747 if (GOT_TLS_GD_P (tls_type))
3748 dr_type = R_X86_64_DTPMOD64;
3749 else if (GOT_TLS_GDESC_P (tls_type))
3752 dr_type = R_X86_64_TPOFF64;
3754 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
3755 outrel.r_addend = 0;
3756 if ((dr_type == R_X86_64_TPOFF64
3757 || dr_type == R_X86_64_TLSDESC) && indx == 0)
3758 outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info);
3759 outrel.r_info = htab->r_info (indx, dr_type);
3761 elf_append_rela (output_bfd, sreloc, &outrel);
3763 if (GOT_TLS_GD_P (tls_type))
3767 BFD_ASSERT (! unresolved_reloc);
3768 bfd_put_64 (output_bfd,
3769 relocation - _bfd_x86_elf_dtpoff_base (info),
3770 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3774 bfd_put_64 (output_bfd, 0,
3775 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3776 outrel.r_info = htab->r_info (indx,
3778 outrel.r_offset += GOT_ENTRY_SIZE;
3779 elf_append_rela (output_bfd, sreloc,
3788 local_got_offsets[r_symndx] |= 1;
3791 if (off >= (bfd_vma) -2
3792 && ! GOT_TLS_GDESC_P (tls_type))
3794 if (r_type == ELF32_R_TYPE (rel->r_info))
3796 if (r_type == R_X86_64_GOTPC32_TLSDESC
3797 || r_type == R_X86_64_TLSDESC_CALL)
3798 relocation = htab->elf.sgotplt->output_section->vma
3799 + htab->elf.sgotplt->output_offset
3800 + offplt + htab->sgotplt_jump_table_size;
3802 relocation = htab->elf.sgot->output_section->vma
3803 + htab->elf.sgot->output_offset + off;
3804 unresolved_reloc = FALSE;
3808 bfd_vma roff = rel->r_offset;
3810 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
3812 /* GD->IE transition. For 64bit, change
3813 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3814 .word 0x6666; rex64; call __tls_get_addr@PLT
3816 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3818 call *__tls_get_addr@GOTPCREL(%rip
3819 which may be converted to
3820 addr32 call __tls_get_addr
3823 addq foo@gottpoff(%rip), %rax
3825 leaq foo@tlsgd(%rip), %rdi
3826 .word 0x6666; rex64; call __tls_get_addr@PLT
3828 leaq foo@tlsgd(%rip), %rdi
3830 call *__tls_get_addr@GOTPCREL(%rip)
3831 which may be converted to
3832 addr32 call __tls_get_addr
3835 addq foo@gottpoff(%rip), %rax
3836 For largepic, change:
3837 leaq foo@tlsgd(%rip), %rdi
3838 movabsq $__tls_get_addr@pltoff, %rax
3843 addq foo@gottpoff(%rax), %rax
3844 nopw 0x0(%rax,%rax,1) */
3846 if (ABI_64_P (output_bfd))
3848 if (contents[roff + 5] == 0xb8)
3850 memcpy (contents + roff - 3,
3851 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
3852 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
3856 memcpy (contents + roff - 4,
3857 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3861 memcpy (contents + roff - 3,
3862 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
3865 relocation = (htab->elf.sgot->output_section->vma
3866 + htab->elf.sgot->output_offset + off
3869 - input_section->output_section->vma
3870 - input_section->output_offset
3872 bfd_put_32 (output_bfd, relocation,
3873 contents + roff + 8 + largepic);
3874 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
3879 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
3881 /* GDesc -> IE transition.
3882 It's originally something like:
3883 leaq x@tlsdesc(%rip), %rax
3886 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
3888 /* Now modify the instruction as appropriate. To
3889 turn a leaq into a movq in the form we use it, it
3890 suffices to change the second byte from 0x8d to
3892 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3894 bfd_put_32 (output_bfd,
3895 htab->elf.sgot->output_section->vma
3896 + htab->elf.sgot->output_offset + off
3898 - input_section->output_section->vma
3899 - input_section->output_offset
3904 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
3906 /* GDesc -> IE transition.
3913 bfd_put_8 (output_bfd, 0x66, contents + roff);
3914 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3922 case R_X86_64_TLSLD:
3923 if (! elf_x86_64_tls_transition (info, input_bfd,
3924 input_section, contents,
3925 symtab_hdr, sym_hashes,
3926 &r_type, GOT_UNKNOWN, rel,
3927 relend, h, r_symndx, TRUE))
3930 if (r_type != R_X86_64_TLSLD)
3932 /* LD->LE transition:
3933 leaq foo@tlsld(%rip), %rdi
3934 call __tls_get_addr@PLT
3935 For 64bit, we change it into:
3936 .word 0x6666; .byte 0x66; movq %fs:0, %rax
3937 For 32bit, we change it into:
3938 nopl 0x0(%rax); movl %fs:0, %eax
3940 leaq foo@tlsld(%rip), %rdi;
3941 call *__tls_get_addr@GOTPCREL(%rip)
3942 which may be converted to
3943 addr32 call __tls_get_addr
3944 For 64bit, we change it into:
3945 .word 0x6666; .word 0x6666; movq %fs:0, %rax
3946 For 32bit, we change it into:
3947 nopw 0x0(%rax); movl %fs:0, %eax
3948 For largepic, change:
3949 leaq foo@tlsgd(%rip), %rdi
3950 movabsq $__tls_get_addr@pltoff, %rax
3954 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
3957 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
3958 if (ABI_64_P (output_bfd))
3960 if (contents[rel->r_offset + 5] == 0xb8)
3961 memcpy (contents + rel->r_offset - 3,
3962 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
3963 "\x64\x48\x8b\x04\x25\0\0\0", 22);
3964 else if (contents[rel->r_offset + 4] == 0xff
3965 || contents[rel->r_offset + 4] == 0x67)
3966 memcpy (contents + rel->r_offset - 3,
3967 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
3970 memcpy (contents + rel->r_offset - 3,
3971 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
3975 if (contents[rel->r_offset + 4] == 0xff)
3976 memcpy (contents + rel->r_offset - 3,
3977 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
3980 memcpy (contents + rel->r_offset - 3,
3981 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
3983 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
3984 and R_X86_64_PLTOFF64. */
3990 if (htab->elf.sgot == NULL)
3993 off = htab->tls_ld_or_ldm_got.offset;
3998 Elf_Internal_Rela outrel;
4000 if (htab->elf.srelgot == NULL)
4003 outrel.r_offset = (htab->elf.sgot->output_section->vma
4004 + htab->elf.sgot->output_offset + off);
4006 bfd_put_64 (output_bfd, 0,
4007 htab->elf.sgot->contents + off);
4008 bfd_put_64 (output_bfd, 0,
4009 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4010 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
4011 outrel.r_addend = 0;
4012 elf_append_rela (output_bfd, htab->elf.srelgot,
4014 htab->tls_ld_or_ldm_got.offset |= 1;
4016 relocation = htab->elf.sgot->output_section->vma
4017 + htab->elf.sgot->output_offset + off;
4018 unresolved_reloc = FALSE;
4021 case R_X86_64_DTPOFF32:
4022 if (!bfd_link_executable (info)
4023 || (input_section->flags & SEC_CODE) == 0)
4024 relocation -= _bfd_x86_elf_dtpoff_base (info);
4026 relocation = elf_x86_64_tpoff (info, relocation);
4029 case R_X86_64_TPOFF32:
4030 case R_X86_64_TPOFF64:
4031 BFD_ASSERT (bfd_link_executable (info));
4032 relocation = elf_x86_64_tpoff (info, relocation);
4035 case R_X86_64_DTPOFF64:
4036 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
4037 relocation -= _bfd_x86_elf_dtpoff_base (info);
4044 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4045 because such sections are not SEC_ALLOC and thus ld.so will
4046 not process them. */
4047 if (unresolved_reloc
4048 && !((input_section->flags & SEC_DEBUGGING) != 0
4050 && _bfd_elf_section_offset (output_bfd, info, input_section,
4051 rel->r_offset) != (bfd_vma) -1)
4056 sec = h->root.u.def.section;
4057 if ((info->nocopyreloc
4058 || (eh->def_protected
4059 && elf_has_no_copy_on_protected (h->root.u.def.section->owner)))
4060 && !(h->root.u.def.section->flags & SEC_CODE))
4061 return elf_x86_64_need_pic (info, input_bfd, input_section,
4062 h, NULL, NULL, howto);
4067 /* xgettext:c-format */
4068 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
4073 h->root.root.string);
4079 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4080 contents, rel->r_offset,
4081 relocation, rel->r_addend);
4083 check_relocation_error:
4084 if (r != bfd_reloc_ok)
4089 name = h->root.root.string;
4092 name = bfd_elf_string_from_elf_section (input_bfd,
4093 symtab_hdr->sh_link,
4098 name = bfd_section_name (input_bfd, sec);
4101 if (r == bfd_reloc_overflow)
4102 (*info->callbacks->reloc_overflow)
4103 (info, (h ? &h->root : NULL), name, howto->name,
4104 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
4108 /* xgettext:c-format */
4109 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
4110 input_bfd, input_section,
4111 rel->r_offset, name, (int) r);
4122 Elf_Internal_Shdr *rel_hdr;
4123 size_t deleted = rel - wrel;
4125 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4126 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4127 if (rel_hdr->sh_size == 0)
4129 /* It is too late to remove an empty reloc section. Leave
4131 ??? What is wrong with an empty section??? */
4132 rel_hdr->sh_size = rel_hdr->sh_entsize;
4135 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4136 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4137 input_section->reloc_count -= deleted;
4143 /* Finish up dynamic symbol handling. We set the contents of various
4144 dynamic sections here. */
4147 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
4148 struct bfd_link_info *info,
4149 struct elf_link_hash_entry *h,
4150 Elf_Internal_Sym *sym)
4152 struct elf_x86_link_hash_table *htab;
4153 bfd_boolean use_plt_second;
4154 struct elf_x86_link_hash_entry *eh;
4155 bfd_boolean local_undefweak;
4157 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
4161 /* Use the second PLT section only if there is .plt section. */
4162 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
4164 eh = (struct elf_x86_link_hash_entry *) h;
4165 if (eh->no_finish_dynamic_symbol)
4168 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4169 resolved undefined weak symbols in executable so that their
4170 references have value 0 at run-time. */
4171 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4176 if (h->plt.offset != (bfd_vma) -1)
4179 bfd_vma got_offset, plt_offset;
4180 Elf_Internal_Rela rela;
4182 asection *plt, *gotplt, *relplt, *resolved_plt;
4183 const struct elf_backend_data *bed;
4184 bfd_vma plt_got_pcrel_offset;
4186 /* When building a static executable, use .iplt, .igot.plt and
4187 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4188 if (htab->elf.splt != NULL)
4190 plt = htab->elf.splt;
4191 gotplt = htab->elf.sgotplt;
4192 relplt = htab->elf.srelplt;
4196 plt = htab->elf.iplt;
4197 gotplt = htab->elf.igotplt;
4198 relplt = htab->elf.irelplt;
4201 /* This symbol has an entry in the procedure linkage table. Set
4203 if ((h->dynindx == -1
4205 && !((h->forced_local || bfd_link_executable (info))
4207 && h->type == STT_GNU_IFUNC))
4213 /* Get the index in the procedure linkage table which
4214 corresponds to this symbol. This is the index of this symbol
4215 in all the symbols for which we are making plt entries. The
4216 first entry in the procedure linkage table is reserved.
4218 Get the offset into the .got table of the entry that
4219 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4220 bytes. The first three are reserved for the dynamic linker.
4222 For static executables, we don't reserve anything. */
4224 if (plt == htab->elf.splt)
4226 got_offset = (h->plt.offset / htab->plt.plt_entry_size
4227 - htab->plt.has_plt0);
4228 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
4232 got_offset = h->plt.offset / htab->plt.plt_entry_size;
4233 got_offset = got_offset * GOT_ENTRY_SIZE;
4236 /* Fill in the entry in the procedure linkage table. */
4237 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
4238 htab->plt.plt_entry_size);
4241 memcpy (htab->plt_second->contents + eh->plt_second.offset,
4242 htab->non_lazy_plt->plt_entry,
4243 htab->non_lazy_plt->plt_entry_size);
4245 resolved_plt = htab->plt_second;
4246 plt_offset = eh->plt_second.offset;
4251 plt_offset = h->plt.offset;
4254 /* Insert the relocation positions of the plt section. */
4256 /* Put offset the PC-relative instruction referring to the GOT entry,
4257 subtracting the size of that instruction. */
4258 plt_got_pcrel_offset = (gotplt->output_section->vma
4259 + gotplt->output_offset
4261 - resolved_plt->output_section->vma
4262 - resolved_plt->output_offset
4264 - htab->plt.plt_got_insn_size);
4266 /* Check PC-relative offset overflow in PLT entry. */
4267 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
4268 /* xgettext:c-format */
4269 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
4270 output_bfd, h->root.root.string);
4272 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
4273 (resolved_plt->contents + plt_offset
4274 + htab->plt.plt_got_offset));
4276 /* Fill in the entry in the global offset table, initially this
4277 points to the second part of the PLT entry. Leave the entry
4278 as zero for undefined weak symbol in PIE. No PLT relocation
4279 against undefined weak symbol in PIE. */
4280 if (!local_undefweak)
4282 if (htab->plt.has_plt0)
4283 bfd_put_64 (output_bfd, (plt->output_section->vma
4284 + plt->output_offset
4286 + htab->lazy_plt->plt_lazy_offset),
4287 gotplt->contents + got_offset);
4289 /* Fill in the entry in the .rela.plt section. */
4290 rela.r_offset = (gotplt->output_section->vma
4291 + gotplt->output_offset
4293 if (h->dynindx == -1
4294 || ((bfd_link_executable (info)
4295 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4297 && h->type == STT_GNU_IFUNC))
4299 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4300 h->root.root.string,
4301 h->root.u.def.section->owner);
4303 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4304 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4305 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4306 rela.r_addend = (h->root.u.def.value
4307 + h->root.u.def.section->output_section->vma
4308 + h->root.u.def.section->output_offset);
4309 /* R_X86_64_IRELATIVE comes last. */
4310 plt_index = htab->next_irelative_index--;
4314 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
4316 plt_index = htab->next_jump_slot_index++;
4319 /* Don't fill the second and third slots in PLT entry for
4320 static executables nor without PLT0. */
4321 if (plt == htab->elf.splt && htab->plt.has_plt0)
4324 = h->plt.offset + htab->lazy_plt->plt_plt_insn_end;
4326 /* Put relocation index. */
4327 bfd_put_32 (output_bfd, plt_index,
4328 (plt->contents + h->plt.offset
4329 + htab->lazy_plt->plt_reloc_offset));
4331 /* Put offset for jmp .PLT0 and check for overflow. We don't
4332 check relocation index for overflow since branch displacement
4333 will overflow first. */
4334 if (plt0_offset > 0x80000000)
4335 /* xgettext:c-format */
4336 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
4337 output_bfd, h->root.root.string);
4338 bfd_put_32 (output_bfd, - plt0_offset,
4339 (plt->contents + h->plt.offset
4340 + htab->lazy_plt->plt_plt_offset));
4343 bed = get_elf_backend_data (output_bfd);
4344 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
4345 bed->s->swap_reloca_out (output_bfd, &rela, loc);
4348 else if (eh->plt_got.offset != (bfd_vma) -1)
4350 bfd_vma got_offset, plt_offset;
4351 asection *plt, *got;
4352 bfd_boolean got_after_plt;
4353 int32_t got_pcrel_offset;
4355 /* Set the entry in the GOT procedure linkage table. */
4356 plt = htab->plt_got;
4357 got = htab->elf.sgot;
4358 got_offset = h->got.offset;
4360 if (got_offset == (bfd_vma) -1
4361 || (h->type == STT_GNU_IFUNC && h->def_regular)
4366 /* Use the non-lazy PLT entry template for the GOT PLT since they
4367 are the identical. */
4368 /* Fill in the entry in the GOT procedure linkage table. */
4369 plt_offset = eh->plt_got.offset;
4370 memcpy (plt->contents + plt_offset,
4371 htab->non_lazy_plt->plt_entry,
4372 htab->non_lazy_plt->plt_entry_size);
4374 /* Put offset the PC-relative instruction referring to the GOT
4375 entry, subtracting the size of that instruction. */
4376 got_pcrel_offset = (got->output_section->vma
4377 + got->output_offset
4379 - plt->output_section->vma
4380 - plt->output_offset
4382 - htab->non_lazy_plt->plt_got_insn_size);
4384 /* Check PC-relative offset overflow in GOT PLT entry. */
4385 got_after_plt = got->output_section->vma > plt->output_section->vma;
4386 if ((got_after_plt && got_pcrel_offset < 0)
4387 || (!got_after_plt && got_pcrel_offset > 0))
4388 /* xgettext:c-format */
4389 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
4390 output_bfd, h->root.root.string);
4392 bfd_put_32 (output_bfd, got_pcrel_offset,
4393 (plt->contents + plt_offset
4394 + htab->non_lazy_plt->plt_got_offset));
4397 if (!local_undefweak
4399 && (h->plt.offset != (bfd_vma) -1
4400 || eh->plt_got.offset != (bfd_vma) -1))
4402 /* Mark the symbol as undefined, rather than as defined in
4403 the .plt section. Leave the value if there were any
4404 relocations where pointer equality matters (this is a clue
4405 for the dynamic linker, to make function pointer
4406 comparisons work between an application and shared
4407 library), otherwise set it to zero. If a function is only
4408 called from a binary, there is no need to slow down
4409 shared libraries because of that. */
4410 sym->st_shndx = SHN_UNDEF;
4411 if (!h->pointer_equality_needed)
4415 /* Don't generate dynamic GOT relocation against undefined weak
4416 symbol in executable. */
4417 if (h->got.offset != (bfd_vma) -1
4418 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type)
4419 && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE
4420 && !local_undefweak)
4422 Elf_Internal_Rela rela;
4423 asection *relgot = htab->elf.srelgot;
4425 /* This symbol has an entry in the global offset table. Set it
4427 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4430 rela.r_offset = (htab->elf.sgot->output_section->vma
4431 + htab->elf.sgot->output_offset
4432 + (h->got.offset &~ (bfd_vma) 1));
4434 /* If this is a static link, or it is a -Bsymbolic link and the
4435 symbol is defined locally or was forced to be local because
4436 of a version file, we just want to emit a RELATIVE reloc.
4437 The entry in the global offset table will already have been
4438 initialized in the relocate_section function. */
4440 && h->type == STT_GNU_IFUNC)
4442 if (h->plt.offset == (bfd_vma) -1)
4444 /* STT_GNU_IFUNC is referenced without PLT. */
4445 if (htab->elf.splt == NULL)
4447 /* use .rel[a].iplt section to store .got relocations
4448 in static executable. */
4449 relgot = htab->elf.irelplt;
4451 if (SYMBOL_REFERENCES_LOCAL (info, h))
4453 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4455 h->root.root.string,
4456 h->root.u.def.section->owner);
4458 rela.r_info = htab->r_info (0,
4459 R_X86_64_IRELATIVE);
4460 rela.r_addend = (h->root.u.def.value
4461 + h->root.u.def.section->output_section->vma
4462 + h->root.u.def.section->output_offset);
4467 else if (bfd_link_pic (info))
4469 /* Generate R_X86_64_GLOB_DAT. */
4477 if (!h->pointer_equality_needed)
4480 /* For non-shared object, we can't use .got.plt, which
4481 contains the real function addres if we need pointer
4482 equality. We load the GOT entry with the PLT entry. */
4483 if (htab->plt_second != NULL)
4485 plt = htab->plt_second;
4486 plt_offset = eh->plt_second.offset;
4490 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4491 plt_offset = h->plt.offset;
4493 bfd_put_64 (output_bfd, (plt->output_section->vma
4494 + plt->output_offset
4496 htab->elf.sgot->contents + h->got.offset);
4500 else if (bfd_link_pic (info)
4501 && SYMBOL_REFERENCES_LOCAL (info, h))
4503 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
4505 BFD_ASSERT((h->got.offset & 1) != 0);
4506 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4507 rela.r_addend = (h->root.u.def.value
4508 + h->root.u.def.section->output_section->vma
4509 + h->root.u.def.section->output_offset);
4513 BFD_ASSERT((h->got.offset & 1) == 0);
4515 bfd_put_64 (output_bfd, (bfd_vma) 0,
4516 htab->elf.sgot->contents + h->got.offset);
4517 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
4521 elf_append_rela (output_bfd, relgot, &rela);
4526 Elf_Internal_Rela rela;
4529 /* This symbol needs a copy reloc. Set it up. */
4531 if (h->dynindx == -1
4532 || (h->root.type != bfd_link_hash_defined
4533 && h->root.type != bfd_link_hash_defweak)
4534 || htab->elf.srelbss == NULL
4535 || htab->elf.sreldynrelro == NULL)
4538 rela.r_offset = (h->root.u.def.value
4539 + h->root.u.def.section->output_section->vma
4540 + h->root.u.def.section->output_offset);
4541 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
4543 if (h->root.u.def.section == htab->elf.sdynrelro)
4544 s = htab->elf.sreldynrelro;
4546 s = htab->elf.srelbss;
4547 elf_append_rela (output_bfd, s, &rela);
4553 /* Finish up local dynamic symbol handling. We set the contents of
4554 various dynamic sections here. */
4557 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
4559 struct elf_link_hash_entry *h
4560 = (struct elf_link_hash_entry *) *slot;
4561 struct bfd_link_info *info
4562 = (struct bfd_link_info *) inf;
4564 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
4568 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4569 here since undefined weak symbol may not be dynamic and may not be
4570 called for elf_x86_64_finish_dynamic_symbol. */
4573 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
4576 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
4577 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4579 if (h->root.type != bfd_link_hash_undefweak
4580 || h->dynindx != -1)
4583 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
4587 /* Used to decide how to sort relocs in an optimal manner for the
4588 dynamic linker, before writing them out. */
4590 static enum elf_reloc_type_class
4591 elf_x86_64_reloc_type_class (const struct bfd_link_info *info,
4592 const asection *rel_sec ATTRIBUTE_UNUSED,
4593 const Elf_Internal_Rela *rela)
4595 bfd *abfd = info->output_bfd;
4596 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4597 struct elf_x86_link_hash_table *htab
4598 = elf_x86_hash_table (info, X86_64_ELF_DATA);
4600 if (htab->elf.dynsym != NULL
4601 && htab->elf.dynsym->contents != NULL)
4603 /* Check relocation against STT_GNU_IFUNC symbol if there are
4605 unsigned long r_symndx = htab->r_sym (rela->r_info);
4606 if (r_symndx != STN_UNDEF)
4608 Elf_Internal_Sym sym;
4609 if (!bed->s->swap_symbol_in (abfd,
4610 (htab->elf.dynsym->contents
4611 + r_symndx * bed->s->sizeof_sym),
4615 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
4616 return reloc_class_ifunc;
4620 switch ((int) ELF32_R_TYPE (rela->r_info))
4622 case R_X86_64_IRELATIVE:
4623 return reloc_class_ifunc;
4624 case R_X86_64_RELATIVE:
4625 case R_X86_64_RELATIVE64:
4626 return reloc_class_relative;
4627 case R_X86_64_JUMP_SLOT:
4628 return reloc_class_plt;
4630 return reloc_class_copy;
4632 return reloc_class_normal;
4636 /* Finish up the dynamic sections. */
4639 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
4640 struct bfd_link_info *info)
4642 struct elf_x86_link_hash_table *htab;
4646 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
4650 dynobj = htab->elf.dynobj;
4651 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4653 if (htab->elf.dynamic_sections_created)
4655 bfd_byte *dyncon, *dynconend;
4656 const struct elf_backend_data *bed;
4657 bfd_size_type sizeof_dyn;
4659 if (sdyn == NULL || htab->elf.sgot == NULL)
4662 bed = get_elf_backend_data (dynobj);
4663 sizeof_dyn = bed->s->sizeof_dyn;
4664 dyncon = sdyn->contents;
4665 dynconend = sdyn->contents + sdyn->size;
4666 for (; dyncon < dynconend; dyncon += sizeof_dyn)
4668 Elf_Internal_Dyn dyn;
4671 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
4679 s = htab->elf.sgotplt;
4680 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4684 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
4688 s = htab->elf.srelplt->output_section;
4689 dyn.d_un.d_val = s->size;
4692 case DT_TLSDESC_PLT:
4694 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4695 + htab->tlsdesc_plt;
4698 case DT_TLSDESC_GOT:
4700 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4701 + htab->tlsdesc_got;
4705 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
4708 if (htab->elf.splt && htab->elf.splt->size > 0)
4710 elf_section_data (htab->elf.splt->output_section)
4711 ->this_hdr.sh_entsize = htab->plt.plt_entry_size;
4713 if (htab->plt.has_plt0)
4715 /* Fill in the special first entry in the procedure linkage
4717 memcpy (htab->elf.splt->contents,
4718 htab->lazy_plt->plt0_entry,
4719 htab->lazy_plt->plt0_entry_size);
4720 /* Add offset for pushq GOT+8(%rip), since the instruction
4721 uses 6 bytes subtract this value. */
4722 bfd_put_32 (output_bfd,
4723 (htab->elf.sgotplt->output_section->vma
4724 + htab->elf.sgotplt->output_offset
4726 - htab->elf.splt->output_section->vma
4727 - htab->elf.splt->output_offset
4729 (htab->elf.splt->contents
4730 + htab->lazy_plt->plt0_got1_offset));
4731 /* Add offset for the PC-relative instruction accessing
4732 GOT+16, subtracting the offset to the end of that
4734 bfd_put_32 (output_bfd,
4735 (htab->elf.sgotplt->output_section->vma
4736 + htab->elf.sgotplt->output_offset
4738 - htab->elf.splt->output_section->vma
4739 - htab->elf.splt->output_offset
4740 - htab->lazy_plt->plt0_got2_insn_end),
4741 (htab->elf.splt->contents
4742 + htab->lazy_plt->plt0_got2_offset));
4744 if (htab->tlsdesc_plt)
4746 bfd_put_64 (output_bfd, (bfd_vma) 0,
4747 htab->elf.sgot->contents + htab->tlsdesc_got);
4749 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
4750 htab->lazy_plt->plt0_entry,
4751 htab->lazy_plt->plt0_entry_size);
4753 /* Add offset for pushq GOT+8(%rip), since the
4754 instruction uses 6 bytes subtract this value. */
4755 bfd_put_32 (output_bfd,
4756 (htab->elf.sgotplt->output_section->vma
4757 + htab->elf.sgotplt->output_offset
4759 - htab->elf.splt->output_section->vma
4760 - htab->elf.splt->output_offset
4763 (htab->elf.splt->contents
4765 + htab->lazy_plt->plt0_got1_offset));
4766 /* Add offset for the PC-relative instruction accessing
4767 GOT+TDG, where TDG stands for htab->tlsdesc_got,
4768 subtracting the offset to the end of that
4770 bfd_put_32 (output_bfd,
4771 (htab->elf.sgot->output_section->vma
4772 + htab->elf.sgot->output_offset
4774 - htab->elf.splt->output_section->vma
4775 - htab->elf.splt->output_offset
4777 - htab->lazy_plt->plt0_got2_insn_end),
4778 (htab->elf.splt->contents
4780 + htab->lazy_plt->plt0_got2_offset));
4785 if (htab->plt_got != NULL && htab->plt_got->size > 0)
4786 elf_section_data (htab->plt_got->output_section)
4787 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
4789 if (htab->plt_second != NULL && htab->plt_second->size > 0)
4790 elf_section_data (htab->plt_second->output_section)
4791 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
4794 /* GOT is always created in setup_gnu_properties. But it may not be
4796 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
4798 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4801 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4805 /* Set the first entry in the global offset table to the address of
4806 the dynamic section. */
4808 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
4810 bfd_put_64 (output_bfd,
4811 sdyn->output_section->vma + sdyn->output_offset,
4812 htab->elf.sgotplt->contents);
4813 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4814 bfd_put_64 (output_bfd, (bfd_vma) 0,
4815 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
4816 bfd_put_64 (output_bfd, (bfd_vma) 0,
4817 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
4819 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize
4823 /* Adjust .eh_frame for .plt section. */
4824 if (htab->plt_eh_frame != NULL
4825 && htab->plt_eh_frame->contents != NULL)
4827 if (htab->elf.splt != NULL
4828 && htab->elf.splt->size != 0
4829 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4830 && htab->elf.splt->output_section != NULL
4831 && htab->plt_eh_frame->output_section != NULL)
4833 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4834 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4835 + htab->plt_eh_frame->output_offset
4836 + PLT_FDE_START_OFFSET;
4837 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4838 htab->plt_eh_frame->contents
4839 + PLT_FDE_START_OFFSET);
4841 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4843 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4845 htab->plt_eh_frame->contents))
4850 /* Adjust .eh_frame for .plt.got section. */
4851 if (htab->plt_got_eh_frame != NULL
4852 && htab->plt_got_eh_frame->contents != NULL)
4854 if (htab->plt_got != NULL
4855 && htab->plt_got->size != 0
4856 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
4857 && htab->plt_got->output_section != NULL
4858 && htab->plt_got_eh_frame->output_section != NULL)
4860 bfd_vma plt_start = htab->plt_got->output_section->vma;
4861 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
4862 + htab->plt_got_eh_frame->output_offset
4863 + PLT_FDE_START_OFFSET;
4864 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4865 htab->plt_got_eh_frame->contents
4866 + PLT_FDE_START_OFFSET);
4868 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4870 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4871 htab->plt_got_eh_frame,
4872 htab->plt_got_eh_frame->contents))
4877 /* Adjust .eh_frame for the second PLT section. */
4878 if (htab->plt_second_eh_frame != NULL
4879 && htab->plt_second_eh_frame->contents != NULL)
4881 if (htab->plt_second != NULL
4882 && htab->plt_second->size != 0
4883 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
4884 && htab->plt_second->output_section != NULL
4885 && htab->plt_second_eh_frame->output_section != NULL)
4887 bfd_vma plt_start = htab->plt_second->output_section->vma;
4888 bfd_vma eh_frame_start
4889 = (htab->plt_second_eh_frame->output_section->vma
4890 + htab->plt_second_eh_frame->output_offset
4891 + PLT_FDE_START_OFFSET);
4892 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4893 htab->plt_second_eh_frame->contents
4894 + PLT_FDE_START_OFFSET);
4896 if (htab->plt_second_eh_frame->sec_info_type
4897 == SEC_INFO_TYPE_EH_FRAME)
4899 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4900 htab->plt_second_eh_frame,
4901 htab->plt_second_eh_frame->contents))
4906 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4907 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
4910 /* Fill PLT entries for undefined weak symbols in PIE. */
4911 if (bfd_link_pie (info))
4912 bfd_hash_traverse (&info->hash->table,
4913 elf_x86_64_pie_finish_undefweak_symbol,
4919 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4920 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4921 It has to be done before elf_link_sort_relocs is called so that
4922 dynamic relocations are properly sorted. */
4925 elf_x86_64_output_arch_local_syms
4926 (bfd *output_bfd ATTRIBUTE_UNUSED,
4927 struct bfd_link_info *info,
4928 void *flaginfo ATTRIBUTE_UNUSED,
4929 int (*func) (void *, const char *,
4932 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4934 struct elf_x86_link_hash_table *htab
4935 = elf_x86_hash_table (info, X86_64_ELF_DATA);
4939 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4940 htab_traverse (htab->loc_hash_table,
4941 elf_x86_64_finish_local_dynamic_symbol,
4947 /* Forward declaration. */
4948 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt;
4950 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4951 dynamic relocations. */
4954 elf_x86_64_get_synthetic_symtab (bfd *abfd,
4955 long symcount ATTRIBUTE_UNUSED,
4956 asymbol **syms ATTRIBUTE_UNUSED,
4963 bfd_byte *plt_contents;
4965 const struct elf_x86_lazy_plt_layout *lazy_plt;
4966 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4967 const struct elf_x86_lazy_plt_layout *lazy_bnd_plt;
4968 const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt;
4969 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4970 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
4972 enum elf_x86_plt_type plt_type;
4973 struct elf_x86_plt plts[] =
4975 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4976 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4977 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4978 { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 },
4979 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
4984 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4987 if (dynsymcount <= 0)
4990 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4994 if (get_elf_x86_64_backend_data (abfd)->os == is_normal)
4996 lazy_plt = &elf_x86_64_lazy_plt;
4997 non_lazy_plt = &elf_x86_64_non_lazy_plt;
4998 lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt;
4999 non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt;
5000 if (ABI_64_P (abfd))
5002 lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt;
5003 non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt;
5007 lazy_ibt_plt = &elf_x32_lazy_ibt_plt;
5008 non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt;
5013 lazy_plt = &elf_x86_64_nacl_plt;
5014 non_lazy_plt = NULL;
5015 lazy_bnd_plt = NULL;
5016 non_lazy_bnd_plt = NULL;
5017 lazy_ibt_plt = NULL;
5018 non_lazy_ibt_plt = NULL;
5022 for (j = 0; plts[j].name != NULL; j++)
5024 plt = bfd_get_section_by_name (abfd, plts[j].name);
5025 if (plt == NULL || plt->size == 0)
5028 /* Get the PLT section contents. */
5029 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5030 if (plt_contents == NULL)
5032 if (!bfd_get_section_contents (abfd, (asection *) plt,
5033 plt_contents, 0, plt->size))
5035 free (plt_contents);
5039 /* Check what kind of PLT it is. */
5040 plt_type = plt_unknown;
5041 if (plts[j].type == plt_unknown
5042 && (plt->size >= (lazy_plt->plt_entry_size
5043 + lazy_plt->plt_entry_size)))
5045 /* Match lazy PLT first. Need to check the first two
5047 if ((memcmp (plt_contents, lazy_plt->plt0_entry,
5048 lazy_plt->plt0_got1_offset) == 0)
5049 && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6,
5051 plt_type = plt_lazy;
5052 else if (lazy_bnd_plt != NULL
5053 && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry,
5054 lazy_bnd_plt->plt0_got1_offset) == 0)
5055 && (memcmp (plt_contents + 6,
5056 lazy_bnd_plt->plt0_entry + 6, 3) == 0))
5058 plt_type = plt_lazy | plt_second;
5059 /* The fist entry in the lazy IBT PLT is the same as the
5061 if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size,
5062 lazy_ibt_plt->plt_entry,
5063 lazy_ibt_plt->plt_got_offset) == 0))
5064 lazy_plt = lazy_ibt_plt;
5066 lazy_plt = lazy_bnd_plt;
5070 if (non_lazy_plt != NULL
5071 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
5072 && plt->size >= non_lazy_plt->plt_entry_size)
5074 /* Match non-lazy PLT. */
5075 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
5076 non_lazy_plt->plt_got_offset) == 0)
5077 plt_type = plt_non_lazy;
5080 if (plt_type == plt_unknown || plt_type == plt_second)
5082 if (non_lazy_bnd_plt != NULL
5083 && plt->size >= non_lazy_bnd_plt->plt_entry_size
5084 && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry,
5085 non_lazy_bnd_plt->plt_got_offset) == 0))
5087 /* Match BND PLT. */
5088 plt_type = plt_second;
5089 non_lazy_plt = non_lazy_bnd_plt;
5091 else if (non_lazy_ibt_plt != NULL
5092 && plt->size >= non_lazy_ibt_plt->plt_entry_size
5093 && (memcmp (plt_contents,
5094 non_lazy_ibt_plt->plt_entry,
5095 non_lazy_ibt_plt->plt_got_offset) == 0))
5097 /* Match IBT PLT. */
5098 plt_type = plt_second;
5099 non_lazy_plt = non_lazy_ibt_plt;
5103 if (plt_type == plt_unknown)
5105 free (plt_contents);
5110 plts[j].type = plt_type;
5112 if ((plt_type & plt_lazy))
5114 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
5115 plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size;
5116 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
5117 /* Skip PLT0 in lazy PLT. */
5122 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
5123 plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size;
5124 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
5128 /* Skip lazy PLT when the second PLT is used. */
5129 if (plt_type == (plt_lazy | plt_second))
5133 n = plt->size / plts[j].plt_entry_size;
5138 plts[j].contents = plt_contents;
5141 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
5142 (bfd_vma) 0, plts, dynsyms,
5146 /* Handle an x86-64 specific section when reading an object file. This
5147 is called when elfcode.h finds a section with an unknown type. */
5150 elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
5151 const char *name, int shindex)
5153 if (hdr->sh_type != SHT_X86_64_UNWIND)
5156 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
5162 /* Hook called by the linker routine which adds symbols from an object
5163 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5167 elf_x86_64_add_symbol_hook (bfd *abfd,
5168 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5169 Elf_Internal_Sym *sym,
5170 const char **namep ATTRIBUTE_UNUSED,
5171 flagword *flagsp ATTRIBUTE_UNUSED,
5177 switch (sym->st_shndx)
5179 case SHN_X86_64_LCOMMON:
5180 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
5183 lcomm = bfd_make_section_with_flags (abfd,
5187 | SEC_LINKER_CREATED));
5190 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
5193 *valp = sym->st_size;
5201 /* Given a BFD section, try to locate the corresponding ELF section
5205 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
5206 asection *sec, int *index_return)
5208 if (sec == &_bfd_elf_large_com_section)
5210 *index_return = SHN_X86_64_LCOMMON;
5216 /* Process a symbol. */
5219 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5222 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5224 switch (elfsym->internal_elf_sym.st_shndx)
5226 case SHN_X86_64_LCOMMON:
5227 asym->section = &_bfd_elf_large_com_section;
5228 asym->value = elfsym->internal_elf_sym.st_size;
5229 /* Common symbol doesn't set BSF_GLOBAL. */
5230 asym->flags &= ~BSF_GLOBAL;
5236 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
5238 return (sym->st_shndx == SHN_COMMON
5239 || sym->st_shndx == SHN_X86_64_LCOMMON);
5243 elf_x86_64_common_section_index (asection *sec)
5245 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5248 return SHN_X86_64_LCOMMON;
5252 elf_x86_64_common_section (asection *sec)
5254 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
5255 return bfd_com_section_ptr;
5257 return &_bfd_elf_large_com_section;
5261 elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
5262 const Elf_Internal_Sym *sym,
5267 const asection *oldsec)
5269 /* A normal common symbol and a large common symbol result in a
5270 normal common symbol. We turn the large common symbol into a
5273 && h->root.type == bfd_link_hash_common
5275 && bfd_is_com_section (*psec)
5278 if (sym->st_shndx == SHN_COMMON
5279 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
5281 h->root.u.c.p->section
5282 = bfd_make_section_old_way (oldbfd, "COMMON");
5283 h->root.u.c.p->section->flags = SEC_ALLOC;
5285 else if (sym->st_shndx == SHN_X86_64_LCOMMON
5286 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
5287 *psec = bfd_com_section_ptr;
5294 elf_x86_64_additional_program_headers (bfd *abfd,
5295 struct bfd_link_info *info ATTRIBUTE_UNUSED)
5300 /* Check to see if we need a large readonly segment. */
5301 s = bfd_get_section_by_name (abfd, ".lrodata");
5302 if (s && (s->flags & SEC_LOAD))
5305 /* Check to see if we need a large data segment. Since .lbss sections
5306 is placed right after the .bss section, there should be no need for
5307 a large data segment just because of .lbss. */
5308 s = bfd_get_section_by_name (abfd, ".ldata");
5309 if (s && (s->flags & SEC_LOAD))
5315 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
5318 elf_x86_64_relocs_compatible (const bfd_target *input,
5319 const bfd_target *output)
5321 return ((xvec_get_elf_backend_data (input)->s->elfclass
5322 == xvec_get_elf_backend_data (output)->s->elfclass)
5323 && _bfd_elf_relocs_compatible (input, output));
5326 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
5327 with GNU properties if found. Otherwise, return NULL. */
5330 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info)
5332 struct elf_x86_plt_layout_table plt_layout;
5334 plt_layout.is_vxworks = FALSE;
5335 if (get_elf_x86_64_backend_data (info->output_bfd)->os == is_normal)
5339 plt_layout.lazy_plt = &elf_x86_64_lazy_bnd_plt;
5340 plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt;
5344 plt_layout.lazy_plt = &elf_x86_64_lazy_plt;
5345 plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_plt;
5348 if (ABI_64_P (info->output_bfd))
5350 plt_layout.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt;
5351 plt_layout.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt;
5355 plt_layout.lazy_ibt_plt = &elf_x32_lazy_ibt_plt;
5356 plt_layout.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt;
5358 plt_layout.normal_target = TRUE;
5362 plt_layout.lazy_plt = &elf_x86_64_nacl_plt;
5363 plt_layout.non_lazy_plt = NULL;
5364 plt_layout.lazy_ibt_plt = NULL;
5365 plt_layout.non_lazy_ibt_plt = NULL;
5366 plt_layout.normal_target = FALSE;
5369 return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout);
5372 static const struct bfd_elf_special_section
5373 elf_x86_64_special_sections[]=
5375 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5376 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5377 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
5378 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5379 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
5380 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5381 { NULL, 0, 0, 0, 0 }
5384 #define TARGET_LITTLE_SYM x86_64_elf64_vec
5385 #define TARGET_LITTLE_NAME "elf64-x86-64"
5386 #define ELF_ARCH bfd_arch_i386
5387 #define ELF_TARGET_ID X86_64_ELF_DATA
5388 #define ELF_MACHINE_CODE EM_X86_64
5389 #define ELF_MAXPAGESIZE 0x200000
5390 #define ELF_MINPAGESIZE 0x1000
5391 #define ELF_COMMONPAGESIZE 0x1000
5393 #define elf_backend_can_gc_sections 1
5394 #define elf_backend_can_refcount 1
5395 #define elf_backend_want_got_plt 1
5396 #define elf_backend_plt_readonly 1
5397 #define elf_backend_want_plt_sym 0
5398 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5399 #define elf_backend_rela_normal 1
5400 #define elf_backend_plt_alignment 4
5401 #define elf_backend_extern_protected_data 1
5402 #define elf_backend_caches_rawsize 1
5403 #define elf_backend_dtrel_excludes_plt 1
5404 #define elf_backend_want_dynrelro 1
5406 #define elf_info_to_howto elf_x86_64_info_to_howto
5408 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5409 #define bfd_elf64_bfd_reloc_name_lookup \
5410 elf_x86_64_reloc_name_lookup
5412 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5413 #define elf_backend_check_relocs elf_x86_64_check_relocs
5414 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5415 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5416 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5417 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
5418 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5419 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5421 #define elf_backend_write_core_note elf_x86_64_write_core_note
5423 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5424 #define elf_backend_relocate_section elf_x86_64_relocate_section
5425 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5426 #define elf_backend_object_p elf64_x86_64_elf_object_p
5427 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
5429 #define elf_backend_section_from_shdr \
5430 elf_x86_64_section_from_shdr
5432 #define elf_backend_section_from_bfd_section \
5433 elf_x86_64_elf_section_from_bfd_section
5434 #define elf_backend_add_symbol_hook \
5435 elf_x86_64_add_symbol_hook
5436 #define elf_backend_symbol_processing \
5437 elf_x86_64_symbol_processing
5438 #define elf_backend_common_section_index \
5439 elf_x86_64_common_section_index
5440 #define elf_backend_common_section \
5441 elf_x86_64_common_section
5442 #define elf_backend_common_definition \
5443 elf_x86_64_common_definition
5444 #define elf_backend_merge_symbol \
5445 elf_x86_64_merge_symbol
5446 #define elf_backend_special_sections \
5447 elf_x86_64_special_sections
5448 #define elf_backend_additional_program_headers \
5449 elf_x86_64_additional_program_headers
5450 #define elf_backend_setup_gnu_properties \
5451 elf_x86_64_link_setup_gnu_properties
5453 #include "elf64-target.h"
5455 /* CloudABI support. */
5457 #undef TARGET_LITTLE_SYM
5458 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
5459 #undef TARGET_LITTLE_NAME
5460 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
5463 #define ELF_OSABI ELFOSABI_CLOUDABI
5466 #define elf64_bed elf64_x86_64_cloudabi_bed
5468 #include "elf64-target.h"
5470 /* FreeBSD support. */
5472 #undef TARGET_LITTLE_SYM
5473 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
5474 #undef TARGET_LITTLE_NAME
5475 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5478 #define ELF_OSABI ELFOSABI_FREEBSD
5481 #define elf64_bed elf64_x86_64_fbsd_bed
5483 #include "elf64-target.h"
5485 /* Solaris 2 support. */
5487 #undef TARGET_LITTLE_SYM
5488 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
5489 #undef TARGET_LITTLE_NAME
5490 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5492 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5493 objects won't be recognized. */
5497 #define elf64_bed elf64_x86_64_sol2_bed
5499 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5501 #undef elf_backend_static_tls_alignment
5502 #define elf_backend_static_tls_alignment 16
5504 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5506 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5508 #undef elf_backend_want_plt_sym
5509 #define elf_backend_want_plt_sym 1
5511 #undef elf_backend_strtab_flags
5512 #define elf_backend_strtab_flags SHF_STRINGS
5515 elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
5516 bfd *obfd ATTRIBUTE_UNUSED,
5517 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
5518 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
5520 /* PR 19938: FIXME: Need to add code for setting the sh_info
5521 and sh_link fields of Solaris specific section types. */
5525 #undef elf_backend_copy_special_section_fields
5526 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
5528 #include "elf64-target.h"
5530 /* Native Client support. */
5533 elf64_x86_64_nacl_elf_object_p (bfd *abfd)
5535 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
5536 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
5540 #undef TARGET_LITTLE_SYM
5541 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
5542 #undef TARGET_LITTLE_NAME
5543 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5545 #define elf64_bed elf64_x86_64_nacl_bed
5547 #undef ELF_MAXPAGESIZE
5548 #undef ELF_MINPAGESIZE
5549 #undef ELF_COMMONPAGESIZE
5550 #define ELF_MAXPAGESIZE 0x10000
5551 #define ELF_MINPAGESIZE 0x10000
5552 #define ELF_COMMONPAGESIZE 0x10000
5554 /* Restore defaults. */
5556 #undef elf_backend_static_tls_alignment
5557 #undef elf_backend_want_plt_sym
5558 #define elf_backend_want_plt_sym 0
5559 #undef elf_backend_strtab_flags
5560 #undef elf_backend_copy_special_section_fields
5562 /* NaCl uses substantially different PLT entries for the same effects. */
5564 #undef elf_backend_plt_alignment
5565 #define elf_backend_plt_alignment 5
5566 #define NACL_PLT_ENTRY_SIZE 64
5567 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5569 static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
5571 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5572 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5573 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5574 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5575 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5577 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5578 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
5580 /* 32 bytes of nop to pad out to the standard size. */
5581 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5582 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5583 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5584 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5585 0x66, /* excess data16 prefix */
5589 static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5591 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5592 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5593 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5594 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5596 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5597 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5598 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5600 /* Lazy GOT entries point here (32-byte aligned). */
5601 0x68, /* pushq immediate */
5602 0, 0, 0, 0, /* replaced with index into relocation table. */
5603 0xe9, /* jmp relative */
5604 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5606 /* 22 bytes of nop to pad out to the standard size. */
5607 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
5608 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5609 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5612 /* .eh_frame covering the .plt section. */
5614 static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
5616 #if (PLT_CIE_LENGTH != 20 \
5617 || PLT_FDE_LENGTH != 36 \
5618 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5619 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5620 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5622 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5623 0, 0, 0, 0, /* CIE ID */
5624 1, /* CIE version */
5625 'z', 'R', 0, /* Augmentation string */
5626 1, /* Code alignment factor */
5627 0x78, /* Data alignment factor */
5628 16, /* Return address column */
5629 1, /* Augmentation size */
5630 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5631 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5632 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5633 DW_CFA_nop, DW_CFA_nop,
5635 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5636 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
5637 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5638 0, 0, 0, 0, /* .plt size goes here */
5639 0, /* Augmentation size */
5640 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
5641 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5642 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
5643 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5644 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5645 13, /* Block length */
5646 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
5647 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
5648 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5649 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
5650 DW_CFA_nop, DW_CFA_nop
5653 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt =
5655 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
5656 NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */
5657 elf_x86_64_nacl_plt_entry, /* plt_entry */
5658 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5659 2, /* plt0_got1_offset */
5660 9, /* plt0_got2_offset */
5661 13, /* plt0_got2_insn_end */
5662 3, /* plt_got_offset */
5663 33, /* plt_reloc_offset */
5664 38, /* plt_plt_offset */
5665 7, /* plt_got_insn_size */
5666 42, /* plt_plt_insn_end */
5667 32, /* plt_lazy_offset */
5668 elf_x86_64_nacl_plt0_entry, /* pic_plt0_entry */
5669 elf_x86_64_nacl_plt_entry, /* pic_plt_entry */
5670 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
5671 sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */
5674 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
5679 #undef elf_backend_arch_data
5680 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5682 #undef elf_backend_object_p
5683 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
5684 #undef elf_backend_modify_segment_map
5685 #define elf_backend_modify_segment_map nacl_modify_segment_map
5686 #undef elf_backend_modify_program_headers
5687 #define elf_backend_modify_program_headers nacl_modify_program_headers
5688 #undef elf_backend_final_write_processing
5689 #define elf_backend_final_write_processing nacl_final_write_processing
5691 #include "elf64-target.h"
5693 /* Native Client x32 support. */
5696 elf32_x86_64_nacl_elf_object_p (bfd *abfd)
5698 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
5699 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
5703 #undef TARGET_LITTLE_SYM
5704 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
5705 #undef TARGET_LITTLE_NAME
5706 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5708 #define elf32_bed elf32_x86_64_nacl_bed
5710 #define bfd_elf32_bfd_reloc_type_lookup \
5711 elf_x86_64_reloc_type_lookup
5712 #define bfd_elf32_bfd_reloc_name_lookup \
5713 elf_x86_64_reloc_name_lookup
5714 #define bfd_elf32_get_synthetic_symtab \
5715 elf_x86_64_get_synthetic_symtab
5717 #undef elf_backend_object_p
5718 #define elf_backend_object_p \
5719 elf32_x86_64_nacl_elf_object_p
5721 #undef elf_backend_bfd_from_remote_memory
5722 #define elf_backend_bfd_from_remote_memory \
5723 _bfd_elf32_bfd_from_remote_memory
5725 #undef elf_backend_size_info
5726 #define elf_backend_size_info \
5727 _bfd_elf32_size_info
5729 #include "elf32-target.h"
5731 /* Restore defaults. */
5732 #undef elf_backend_object_p
5733 #define elf_backend_object_p elf64_x86_64_elf_object_p
5734 #undef elf_backend_bfd_from_remote_memory
5735 #undef elf_backend_size_info
5736 #undef elf_backend_modify_segment_map
5737 #undef elf_backend_modify_program_headers
5738 #undef elf_backend_final_write_processing
5740 /* Intel L1OM support. */
5743 elf64_l1om_elf_object_p (bfd *abfd)
5745 /* Set the right machine number for an L1OM elf64 file. */
5746 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
5750 #undef TARGET_LITTLE_SYM
5751 #define TARGET_LITTLE_SYM l1om_elf64_vec
5752 #undef TARGET_LITTLE_NAME
5753 #define TARGET_LITTLE_NAME "elf64-l1om"
5755 #define ELF_ARCH bfd_arch_l1om
5757 #undef ELF_MACHINE_CODE
5758 #define ELF_MACHINE_CODE EM_L1OM
5763 #define elf64_bed elf64_l1om_bed
5765 #undef elf_backend_object_p
5766 #define elf_backend_object_p elf64_l1om_elf_object_p
5768 /* Restore defaults. */
5769 #undef ELF_MAXPAGESIZE
5770 #undef ELF_MINPAGESIZE
5771 #undef ELF_COMMONPAGESIZE
5772 #define ELF_MAXPAGESIZE 0x200000
5773 #define ELF_MINPAGESIZE 0x1000
5774 #define ELF_COMMONPAGESIZE 0x1000
5775 #undef elf_backend_plt_alignment
5776 #define elf_backend_plt_alignment 4
5777 #undef elf_backend_arch_data
5778 #define elf_backend_arch_data &elf_x86_64_arch_bed
5780 #include "elf64-target.h"
5782 /* FreeBSD L1OM support. */
5784 #undef TARGET_LITTLE_SYM
5785 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
5786 #undef TARGET_LITTLE_NAME
5787 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5790 #define ELF_OSABI ELFOSABI_FREEBSD
5793 #define elf64_bed elf64_l1om_fbsd_bed
5795 #include "elf64-target.h"
5797 /* Intel K1OM support. */
5800 elf64_k1om_elf_object_p (bfd *abfd)
5802 /* Set the right machine number for an K1OM elf64 file. */
5803 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
5807 #undef TARGET_LITTLE_SYM
5808 #define TARGET_LITTLE_SYM k1om_elf64_vec
5809 #undef TARGET_LITTLE_NAME
5810 #define TARGET_LITTLE_NAME "elf64-k1om"
5812 #define ELF_ARCH bfd_arch_k1om
5814 #undef ELF_MACHINE_CODE
5815 #define ELF_MACHINE_CODE EM_K1OM
5820 #define elf64_bed elf64_k1om_bed
5822 #undef elf_backend_object_p
5823 #define elf_backend_object_p elf64_k1om_elf_object_p
5825 #undef elf_backend_static_tls_alignment
5827 #undef elf_backend_want_plt_sym
5828 #define elf_backend_want_plt_sym 0
5830 #include "elf64-target.h"
5832 /* FreeBSD K1OM support. */
5834 #undef TARGET_LITTLE_SYM
5835 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
5836 #undef TARGET_LITTLE_NAME
5837 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5840 #define ELF_OSABI ELFOSABI_FREEBSD
5843 #define elf64_bed elf64_k1om_fbsd_bed
5845 #include "elf64-target.h"
5847 /* 32bit x86-64 support. */
5849 #undef TARGET_LITTLE_SYM
5850 #define TARGET_LITTLE_SYM x86_64_elf32_vec
5851 #undef TARGET_LITTLE_NAME
5852 #define TARGET_LITTLE_NAME "elf32-x86-64"
5856 #define ELF_ARCH bfd_arch_i386
5858 #undef ELF_MACHINE_CODE
5859 #define ELF_MACHINE_CODE EM_X86_64
5863 #undef elf_backend_object_p
5864 #define elf_backend_object_p \
5865 elf32_x86_64_elf_object_p
5867 #undef elf_backend_bfd_from_remote_memory
5868 #define elf_backend_bfd_from_remote_memory \
5869 _bfd_elf32_bfd_from_remote_memory
5871 #undef elf_backend_size_info
5872 #define elf_backend_size_info \
5873 _bfd_elf32_size_info
5875 #include "elf32-target.h"