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 #define PLT_CIE_LENGTH 20
651 #define PLT_FDE_LENGTH 36
652 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
653 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
654 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
655 0, 0, 0, 0, /* CIE ID */
657 'z', 'R', 0, /* Augmentation string */
658 1, /* Code alignment factor */
659 0x78, /* Data alignment factor */
660 16, /* Return address column */
661 1, /* Augmentation size */
662 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
663 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
664 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
665 DW_CFA_nop, DW_CFA_nop,
667 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
668 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
669 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
670 0, 0, 0, 0, /* .plt size goes here */
671 0, /* Augmentation size */
672 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
673 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
674 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
675 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
676 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
677 11, /* Block length */
678 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
679 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
680 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
681 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
682 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
685 /* .eh_frame covering the lazy BND .plt section. */
687 static const bfd_byte elf_x86_64_eh_frame_lazy_bnd_plt[] =
689 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
690 0, 0, 0, 0, /* CIE ID */
692 'z', 'R', 0, /* Augmentation string */
693 1, /* Code alignment factor */
694 0x78, /* Data alignment factor */
695 16, /* Return address column */
696 1, /* Augmentation size */
697 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
698 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
699 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
700 DW_CFA_nop, DW_CFA_nop,
702 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
703 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
704 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
705 0, 0, 0, 0, /* .plt size goes here */
706 0, /* Augmentation size */
707 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
708 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
709 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
710 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
711 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
712 11, /* Block length */
713 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
714 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
715 DW_OP_lit15, DW_OP_and, DW_OP_lit5, DW_OP_ge,
716 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
717 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
720 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
722 static const bfd_byte elf_x86_64_eh_frame_lazy_ibt_plt[] =
724 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
725 0, 0, 0, 0, /* CIE ID */
727 'z', 'R', 0, /* Augmentation string */
728 1, /* Code alignment factor */
729 0x78, /* Data alignment factor */
730 16, /* Return address column */
731 1, /* Augmentation size */
732 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
733 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
734 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
735 DW_CFA_nop, DW_CFA_nop,
737 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
738 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
739 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
740 0, 0, 0, 0, /* .plt size goes here */
741 0, /* Augmentation size */
742 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
743 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
744 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
745 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
746 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
747 11, /* Block length */
748 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
749 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
750 DW_OP_lit15, DW_OP_and, DW_OP_lit10, DW_OP_ge,
751 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
752 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
755 /* .eh_frame covering the x32 lazy .plt section with IBT-enabled. */
757 static const bfd_byte elf_x32_eh_frame_lazy_ibt_plt[] =
759 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
760 0, 0, 0, 0, /* CIE ID */
762 'z', 'R', 0, /* Augmentation string */
763 1, /* Code alignment factor */
764 0x78, /* Data alignment factor */
765 16, /* Return address column */
766 1, /* Augmentation size */
767 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
768 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
769 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
770 DW_CFA_nop, DW_CFA_nop,
772 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
773 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
774 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
775 0, 0, 0, 0, /* .plt size goes here */
776 0, /* Augmentation size */
777 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
778 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
779 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
780 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
781 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
782 11, /* Block length */
783 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
784 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
785 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
786 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
787 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
790 /* .eh_frame covering the non-lazy .plt section. */
792 static const bfd_byte elf_x86_64_eh_frame_non_lazy_plt[] =
794 #define PLT_GOT_FDE_LENGTH 20
795 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
796 0, 0, 0, 0, /* CIE ID */
798 'z', 'R', 0, /* Augmentation string */
799 1, /* Code alignment factor */
800 0x78, /* Data alignment factor */
801 16, /* Return address column */
802 1, /* Augmentation size */
803 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
804 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
805 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
806 DW_CFA_nop, DW_CFA_nop,
808 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
809 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
810 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
811 0, 0, 0, 0, /* non-lazy .plt size goes here */
812 0, /* Augmentation size */
813 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop,
814 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
817 /* Architecture-specific backend data for x86-64. */
819 struct elf_x86_64_backend_data
829 #define get_elf_x86_64_arch_data(bed) \
830 ((const struct elf_x86_64_backend_data *) (bed)->arch_data)
832 #define get_elf_x86_64_backend_data(abfd) \
833 get_elf_x86_64_arch_data (get_elf_backend_data (abfd))
835 /* These are the standard parameters. */
836 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_plt =
838 elf_x86_64_lazy_plt0_entry, /* plt0_entry */
839 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
840 elf_x86_64_lazy_plt_entry, /* plt_entry */
841 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
842 2, /* plt0_got1_offset */
843 8, /* plt0_got2_offset */
844 12, /* plt0_got2_insn_end */
845 2, /* plt_got_offset */
846 7, /* plt_reloc_offset */
847 12, /* plt_plt_offset */
848 6, /* plt_got_insn_size */
849 LAZY_PLT_ENTRY_SIZE, /* plt_plt_insn_end */
850 6, /* plt_lazy_offset */
851 elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */
852 elf_x86_64_lazy_plt_entry, /* pic_plt_entry */
853 elf_x86_64_eh_frame_lazy_plt, /* eh_frame_plt */
854 sizeof (elf_x86_64_eh_frame_lazy_plt) /* eh_frame_plt_size */
857 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_plt =
859 elf_x86_64_non_lazy_plt_entry, /* plt_entry */
860 elf_x86_64_non_lazy_plt_entry, /* pic_plt_entry */
861 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
862 2, /* plt_got_offset */
863 6, /* plt_got_insn_size */
864 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
865 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
868 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_bnd_plt =
870 elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */
871 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
872 elf_x86_64_lazy_bnd_plt_entry, /* plt_entry */
873 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
874 2, /* plt0_got1_offset */
875 1+8, /* plt0_got2_offset */
876 1+12, /* plt0_got2_insn_end */
877 1+2, /* plt_got_offset */
878 1, /* plt_reloc_offset */
879 7, /* plt_plt_offset */
880 1+6, /* plt_got_insn_size */
881 11, /* plt_plt_insn_end */
882 0, /* plt_lazy_offset */
883 elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */
884 elf_x86_64_lazy_bnd_plt_entry, /* pic_plt_entry */
885 elf_x86_64_eh_frame_lazy_bnd_plt, /* eh_frame_plt */
886 sizeof (elf_x86_64_eh_frame_lazy_bnd_plt) /* eh_frame_plt_size */
889 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_bnd_plt =
891 elf_x86_64_non_lazy_bnd_plt_entry, /* plt_entry */
892 elf_x86_64_non_lazy_bnd_plt_entry, /* pic_plt_entry */
893 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
894 1+2, /* plt_got_offset */
895 1+6, /* plt_got_insn_size */
896 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
897 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
900 static const struct elf_x86_lazy_plt_layout elf_x86_64_lazy_ibt_plt =
902 elf_x86_64_lazy_bnd_plt0_entry, /* plt0_entry */
903 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
904 elf_x86_64_lazy_ibt_plt_entry, /* plt_entry */
905 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
906 2, /* plt0_got1_offset */
907 1+8, /* plt0_got2_offset */
908 1+12, /* plt0_got2_insn_end */
909 4+1+2, /* plt_got_offset */
910 4+1, /* plt_reloc_offset */
911 4+1+6, /* plt_plt_offset */
912 4+1+6, /* plt_got_insn_size */
913 4+1+5+5, /* plt_plt_insn_end */
914 0, /* plt_lazy_offset */
915 elf_x86_64_lazy_bnd_plt0_entry, /* pic_plt0_entry */
916 elf_x86_64_lazy_ibt_plt_entry, /* pic_plt_entry */
917 elf_x86_64_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
918 sizeof (elf_x86_64_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
921 static const struct elf_x86_lazy_plt_layout elf_x32_lazy_ibt_plt =
923 elf_x86_64_lazy_plt0_entry, /* plt0_entry */
924 LAZY_PLT_ENTRY_SIZE, /* plt0_entry_size */
925 elf_x32_lazy_ibt_plt_entry, /* plt_entry */
926 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
927 2, /* plt0_got1_offset */
928 8, /* plt0_got2_offset */
929 12, /* plt0_got2_insn_end */
930 4+2, /* plt_got_offset */
931 4+1, /* plt_reloc_offset */
932 4+6, /* plt_plt_offset */
933 4+6, /* plt_got_insn_size */
934 4+5+5, /* plt_plt_insn_end */
935 0, /* plt_lazy_offset */
936 elf_x86_64_lazy_plt0_entry, /* pic_plt0_entry */
937 elf_x32_lazy_ibt_plt_entry, /* pic_plt_entry */
938 elf_x32_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
939 sizeof (elf_x32_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
942 static const struct elf_x86_non_lazy_plt_layout elf_x86_64_non_lazy_ibt_plt =
944 elf_x86_64_non_lazy_ibt_plt_entry, /* plt_entry */
945 elf_x86_64_non_lazy_ibt_plt_entry, /* pic_plt_entry */
946 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
947 4+1+2, /* plt_got_offset */
948 4+1+6, /* plt_got_insn_size */
949 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
950 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
953 static const struct elf_x86_non_lazy_plt_layout elf_x32_non_lazy_ibt_plt =
955 elf_x32_non_lazy_ibt_plt_entry, /* plt_entry */
956 elf_x32_non_lazy_ibt_plt_entry, /* pic_plt_entry */
957 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
958 4+2, /* plt_got_offset */
959 4+6, /* plt_got_insn_size */
960 elf_x86_64_eh_frame_non_lazy_plt, /* eh_frame_plt */
961 sizeof (elf_x86_64_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
964 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
969 #define elf_backend_arch_data &elf_x86_64_arch_bed
972 elf64_x86_64_elf_object_p (bfd *abfd)
974 /* Set the right machine number for an x86-64 elf64 file. */
975 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
980 elf32_x86_64_elf_object_p (bfd *abfd)
982 /* Set the right machine number for an x86-64 elf32 file. */
983 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
987 /* Return TRUE if the TLS access code sequence support transition
991 elf_x86_64_check_tls_transition (bfd *abfd,
992 struct bfd_link_info *info,
995 Elf_Internal_Shdr *symtab_hdr,
996 struct elf_link_hash_entry **sym_hashes,
998 const Elf_Internal_Rela *rel,
999 const Elf_Internal_Rela *relend)
1002 unsigned long r_symndx;
1003 bfd_boolean largepic = FALSE;
1004 struct elf_link_hash_entry *h;
1006 struct elf_x86_link_hash_table *htab;
1008 bfd_boolean indirect_call;
1010 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
1011 offset = rel->r_offset;
1014 case R_X86_64_TLSGD:
1015 case R_X86_64_TLSLD:
1016 if ((rel + 1) >= relend)
1019 if (r_type == R_X86_64_TLSGD)
1021 /* Check transition from GD access model. For 64bit, only
1022 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1023 .word 0x6666; rex64; call __tls_get_addr@PLT
1025 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1027 call *__tls_get_addr@GOTPCREL(%rip)
1028 which may be converted to
1029 addr32 call __tls_get_addr
1030 can transit to different access model. For 32bit, only
1031 leaq foo@tlsgd(%rip), %rdi
1032 .word 0x6666; rex64; call __tls_get_addr@PLT
1034 leaq foo@tlsgd(%rip), %rdi
1036 call *__tls_get_addr@GOTPCREL(%rip)
1037 which may be converted to
1038 addr32 call __tls_get_addr
1039 can transit to different access model. For largepic,
1041 leaq foo@tlsgd(%rip), %rdi
1042 movabsq $__tls_get_addr@pltoff, %rax
1046 leaq foo@tlsgd(%rip), %rdi
1047 movabsq $__tls_get_addr@pltoff, %rax
1051 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1053 if ((offset + 12) > sec->size)
1056 call = contents + offset + 4;
1058 || !((call[1] == 0x48
1066 && call[3] == 0xe8)))
1068 if (!ABI_64_P (abfd)
1069 || (offset + 19) > sec->size
1071 || memcmp (call - 7, leaq + 1, 3) != 0
1072 || memcmp (call, "\x48\xb8", 2) != 0
1076 || !((call[10] == 0x48 && call[12] == 0xd8)
1077 || (call[10] == 0x4c && call[12] == 0xf8)))
1081 else if (ABI_64_P (abfd))
1084 || memcmp (contents + offset - 4, leaq, 4) != 0)
1090 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
1093 indirect_call = call[2] == 0xff;
1097 /* Check transition from LD access model. Only
1098 leaq foo@tlsld(%rip), %rdi;
1099 call __tls_get_addr@PLT
1101 leaq foo@tlsld(%rip), %rdi;
1102 call *__tls_get_addr@GOTPCREL(%rip)
1103 which may be converted to
1104 addr32 call __tls_get_addr
1105 can transit to different access model. For largepic
1107 leaq foo@tlsld(%rip), %rdi
1108 movabsq $__tls_get_addr@pltoff, %rax
1112 leaq foo@tlsld(%rip), %rdi
1113 movabsq $__tls_get_addr@pltoff, %rax
1117 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
1119 if (offset < 3 || (offset + 9) > sec->size)
1122 if (memcmp (contents + offset - 3, lea, 3) != 0)
1125 call = contents + offset + 4;
1126 if (!(call[0] == 0xe8
1127 || (call[0] == 0xff && call[1] == 0x15)
1128 || (call[0] == 0x67 && call[1] == 0xe8)))
1130 if (!ABI_64_P (abfd)
1131 || (offset + 19) > sec->size
1132 || memcmp (call, "\x48\xb8", 2) != 0
1136 || !((call[10] == 0x48 && call[12] == 0xd8)
1137 || (call[10] == 0x4c && call[12] == 0xf8)))
1141 indirect_call = call[0] == 0xff;
1144 r_symndx = htab->r_sym (rel[1].r_info);
1145 if (r_symndx < symtab_hdr->sh_info)
1148 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1150 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
1153 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLTOFF64;
1154 else if (indirect_call)
1155 return ELF32_R_TYPE (rel[1].r_info) == R_X86_64_GOTPCRELX;
1157 return (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1158 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
1160 case R_X86_64_GOTTPOFF:
1161 /* Check transition from IE access model:
1162 mov foo@gottpoff(%rip), %reg
1163 add foo@gottpoff(%rip), %reg
1166 /* Check REX prefix first. */
1167 if (offset >= 3 && (offset + 4) <= sec->size)
1169 val = bfd_get_8 (abfd, contents + offset - 3);
1170 if (val != 0x48 && val != 0x4c)
1172 /* X32 may have 0x44 REX prefix or no REX prefix. */
1173 if (ABI_64_P (abfd))
1179 /* X32 may not have any REX prefix. */
1180 if (ABI_64_P (abfd))
1182 if (offset < 2 || (offset + 3) > sec->size)
1186 val = bfd_get_8 (abfd, contents + offset - 2);
1187 if (val != 0x8b && val != 0x03)
1190 val = bfd_get_8 (abfd, contents + offset - 1);
1191 return (val & 0xc7) == 5;
1193 case R_X86_64_GOTPC32_TLSDESC:
1194 /* Check transition from GDesc access model:
1195 leaq x@tlsdesc(%rip), %rax
1197 Make sure it's a leaq adding rip to a 32-bit offset
1198 into any register, although it's probably almost always
1201 if (offset < 3 || (offset + 4) > sec->size)
1204 val = bfd_get_8 (abfd, contents + offset - 3);
1205 if ((val & 0xfb) != 0x48)
1208 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1211 val = bfd_get_8 (abfd, contents + offset - 1);
1212 return (val & 0xc7) == 0x05;
1214 case R_X86_64_TLSDESC_CALL:
1215 /* Check transition from GDesc access model:
1216 call *x@tlsdesc(%rax)
1218 if (offset + 2 <= sec->size)
1220 /* Make sure that it's a call *x@tlsdesc(%rax). */
1221 call = contents + offset;
1222 return call[0] == 0xff && call[1] == 0x10;
1232 /* Return TRUE if the TLS access transition is OK or no transition
1233 will be performed. Update R_TYPE if there is a transition. */
1236 elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1237 asection *sec, bfd_byte *contents,
1238 Elf_Internal_Shdr *symtab_hdr,
1239 struct elf_link_hash_entry **sym_hashes,
1240 unsigned int *r_type, int tls_type,
1241 const Elf_Internal_Rela *rel,
1242 const Elf_Internal_Rela *relend,
1243 struct elf_link_hash_entry *h,
1244 unsigned long r_symndx,
1245 bfd_boolean from_relocate_section)
1247 unsigned int from_type = *r_type;
1248 unsigned int to_type = from_type;
1249 bfd_boolean check = TRUE;
1251 /* Skip TLS transition for functions. */
1253 && (h->type == STT_FUNC
1254 || h->type == STT_GNU_IFUNC))
1259 case R_X86_64_TLSGD:
1260 case R_X86_64_GOTPC32_TLSDESC:
1261 case R_X86_64_TLSDESC_CALL:
1262 case R_X86_64_GOTTPOFF:
1263 if (bfd_link_executable (info))
1266 to_type = R_X86_64_TPOFF32;
1268 to_type = R_X86_64_GOTTPOFF;
1271 /* When we are called from elf_x86_64_relocate_section, there may
1272 be additional transitions based on TLS_TYPE. */
1273 if (from_relocate_section)
1275 unsigned int new_to_type = to_type;
1277 if (bfd_link_executable (info)
1280 && tls_type == GOT_TLS_IE)
1281 new_to_type = R_X86_64_TPOFF32;
1283 if (to_type == R_X86_64_TLSGD
1284 || to_type == R_X86_64_GOTPC32_TLSDESC
1285 || to_type == R_X86_64_TLSDESC_CALL)
1287 if (tls_type == GOT_TLS_IE)
1288 new_to_type = R_X86_64_GOTTPOFF;
1291 /* We checked the transition before when we were called from
1292 elf_x86_64_check_relocs. We only want to check the new
1293 transition which hasn't been checked before. */
1294 check = new_to_type != to_type && from_type == to_type;
1295 to_type = new_to_type;
1300 case R_X86_64_TLSLD:
1301 if (bfd_link_executable (info))
1302 to_type = R_X86_64_TPOFF32;
1309 /* Return TRUE if there is no transition. */
1310 if (from_type == to_type)
1313 /* Check if the transition can be performed. */
1315 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1316 symtab_hdr, sym_hashes,
1317 from_type, rel, relend))
1319 reloc_howto_type *from, *to;
1322 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1323 to = elf_x86_64_rtype_to_howto (abfd, to_type);
1326 name = h->root.root.string;
1329 struct elf_x86_link_hash_table *htab;
1331 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
1336 Elf_Internal_Sym *isym;
1338 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1340 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1345 /* xgettext:c-format */
1346 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1347 "in section `%A' failed"),
1348 abfd, from->name, to->name, name, rel->r_offset, sec);
1349 bfd_set_error (bfd_error_bad_value);
1357 /* Rename some of the generic section flags to better document how they
1359 #define need_convert_load sec_flg0
1360 #define check_relocs_failed sec_flg1
1363 elf_x86_64_need_pic (struct bfd_link_info *info,
1364 bfd *input_bfd, asection *sec,
1365 struct elf_link_hash_entry *h,
1366 Elf_Internal_Shdr *symtab_hdr,
1367 Elf_Internal_Sym *isym,
1368 reloc_howto_type *howto)
1371 const char *und = "";
1372 const char *pic = "";
1378 name = h->root.root.string;
1379 switch (ELF_ST_VISIBILITY (h->other))
1382 v = _("hidden symbol ");
1385 v = _("internal symbol ");
1388 v = _("protected symbol ");
1391 if (((struct elf_x86_link_hash_entry *) h)->def_protected)
1392 v = _("protected symbol ");
1395 pic = _("; recompile with -fPIC");
1399 if (!h->def_regular && !h->def_dynamic)
1400 und = _("undefined ");
1404 name = bfd_elf_sym_name (input_bfd, symtab_hdr, isym, NULL);
1405 pic = _("; recompile with -fPIC");
1408 if (bfd_link_dll (info))
1409 object = _("a shared object");
1410 else if (bfd_link_pie (info))
1411 object = _("a PIE object");
1413 object = _("a PDE object");
1415 /* xgettext:c-format */
1416 _bfd_error_handler (_("%B: relocation %s against %s%s`%s' can "
1417 "not be used when making %s%s"),
1418 input_bfd, howto->name, und, v, name,
1420 bfd_set_error (bfd_error_bad_value);
1421 sec->check_relocs_failed = 1;
1425 /* With the local symbol, foo, we convert
1426 mov foo@GOTPCREL(%rip), %reg
1430 call/jmp *foo@GOTPCREL(%rip)
1432 nop call foo/jmp foo nop
1433 When PIC is false, convert
1434 test %reg, foo@GOTPCREL(%rip)
1438 binop foo@GOTPCREL(%rip), %reg
1441 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1445 elf_x86_64_convert_load_reloc (bfd *abfd, asection *sec,
1447 Elf_Internal_Rela *irel,
1448 struct elf_link_hash_entry *h,
1449 bfd_boolean *converted,
1450 struct bfd_link_info *link_info)
1452 struct elf_x86_link_hash_table *htab;
1454 bfd_boolean require_reloc_pc32;
1456 bfd_boolean to_reloc_pc32;
1459 bfd_signed_vma raddend;
1460 unsigned int opcode;
1462 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
1463 unsigned int r_symndx;
1465 bfd_vma roff = irel->r_offset;
1467 if (roff < (r_type == R_X86_64_REX_GOTPCRELX ? 3 : 2))
1470 raddend = irel->r_addend;
1471 /* Addend for 32-bit PC-relative relocation must be -4. */
1475 htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA);
1476 is_pic = bfd_link_pic (link_info);
1478 relocx = (r_type == R_X86_64_GOTPCRELX
1479 || r_type == R_X86_64_REX_GOTPCRELX);
1481 /* TRUE if we can convert only to R_X86_64_PC32. Enable it for
1484 = link_info->disable_target_specific_optimizations > 1;
1486 r_symndx = htab->r_sym (irel->r_info);
1488 opcode = bfd_get_8 (abfd, contents + roff - 2);
1490 /* Convert mov to lea since it has been done for a while. */
1493 /* Only convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX
1494 for call, jmp or one of adc, add, and, cmp, or, sbb, sub,
1495 test, xor instructions. */
1500 /* We convert only to R_X86_64_PC32:
1502 2. R_X86_64_GOTPCREL since we can't modify REX byte.
1503 3. require_reloc_pc32 is true.
1506 to_reloc_pc32 = (opcode == 0xff
1508 || require_reloc_pc32
1511 /* Get the symbol referred to by the reloc. */
1514 Elf_Internal_Sym *isym
1515 = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, r_symndx);
1517 /* Skip relocation against undefined symbols. */
1518 if (isym->st_shndx == SHN_UNDEF)
1521 symtype = ELF_ST_TYPE (isym->st_info);
1523 if (isym->st_shndx == SHN_ABS)
1524 tsec = bfd_abs_section_ptr;
1525 else if (isym->st_shndx == SHN_COMMON)
1526 tsec = bfd_com_section_ptr;
1527 else if (isym->st_shndx == SHN_X86_64_LCOMMON)
1528 tsec = &_bfd_elf_large_com_section;
1530 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1532 toff = isym->st_value;
1536 /* Undefined weak symbol is only bound locally in executable
1537 and its reference is resolved as 0 without relocation
1538 overflow. We can only perform this optimization for
1539 GOTPCRELX relocations since we need to modify REX byte.
1540 It is OK convert mov with R_X86_64_GOTPCREL to
1542 if ((relocx || opcode == 0x8b)
1543 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info,
1546 elf_x86_hash_entry (h)))
1550 /* Skip for branch instructions since R_X86_64_PC32
1552 if (require_reloc_pc32)
1557 /* For non-branch instructions, we can convert to
1558 R_X86_64_32/R_X86_64_32S since we know if there
1560 to_reloc_pc32 = FALSE;
1563 /* Since we don't know the current PC when PIC is true,
1564 we can't convert to R_X86_64_PC32. */
1565 if (to_reloc_pc32 && is_pic)
1570 /* Avoid optimizing GOTPCREL relocations againt _DYNAMIC since
1571 ld.so may use its link-time address. */
1572 else if (h->start_stop
1574 || h->root.type == bfd_link_hash_defined
1575 || h->root.type == bfd_link_hash_defweak)
1576 && h != htab->elf.hdynamic
1577 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
1579 /* bfd_link_hash_new or bfd_link_hash_undefined is
1580 set by an assignment in a linker script in
1581 bfd_elf_record_link_assignment. start_stop is set
1582 on __start_SECNAME/__stop_SECNAME which mark section
1586 && (h->root.type == bfd_link_hash_new
1587 || h->root.type == bfd_link_hash_undefined
1588 || ((h->root.type == bfd_link_hash_defined
1589 || h->root.type == bfd_link_hash_defweak)
1590 && h->root.u.def.section == bfd_und_section_ptr))))
1592 /* Skip since R_X86_64_32/R_X86_64_32S may overflow. */
1593 if (require_reloc_pc32)
1597 tsec = h->root.u.def.section;
1598 toff = h->root.u.def.value;
1605 /* Don't convert GOTPCREL relocation against large section. */
1606 if (elf_section_data (tsec) != NULL
1607 && (elf_section_flags (tsec) & SHF_X86_64_LARGE) != 0)
1610 /* We can only estimate relocation overflow for R_X86_64_PC32. */
1614 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
1616 /* At this stage in linking, no SEC_MERGE symbol has been
1617 adjusted, so all references to such symbols need to be
1618 passed through _bfd_merged_section_offset. (Later, in
1619 relocate_section, all SEC_MERGE symbols *except* for
1620 section symbols have been adjusted.)
1622 gas may reduce relocations against symbols in SEC_MERGE
1623 sections to a relocation against the section symbol when
1624 the original addend was zero. When the reloc is against
1625 a section symbol we should include the addend in the
1626 offset passed to _bfd_merged_section_offset, since the
1627 location of interest is the original symbol. On the
1628 other hand, an access to "sym+addend" where "sym" is not
1629 a section symbol should not include the addend; Such an
1630 access is presumed to be an offset from "sym"; The
1631 location of interest is just "sym". */
1632 if (symtype == STT_SECTION)
1635 toff = _bfd_merged_section_offset (abfd, &tsec,
1636 elf_section_data (tsec)->sec_info,
1639 if (symtype != STT_SECTION)
1645 /* Don't convert if R_X86_64_PC32 relocation overflows. */
1646 if (tsec->output_section == sec->output_section)
1648 if ((toff - roff + 0x80000000) > 0xffffffff)
1653 bfd_signed_vma distance;
1655 /* At this point, we don't know the load addresses of TSEC
1656 section nor SEC section. We estimate the distrance between
1657 SEC and TSEC. We store the estimated distances in the
1658 compressed_size field of the output section, which is only
1659 used to decompress the compressed input section. */
1660 if (sec->output_section->compressed_size == 0)
1663 bfd_size_type size = 0;
1664 for (asect = link_info->output_bfd->sections;
1666 asect = asect->next)
1667 /* Skip debug sections since compressed_size is used to
1668 compress debug sections. */
1669 if ((asect->flags & SEC_DEBUGGING) == 0)
1672 for (i = asect->map_head.s;
1676 size = align_power (size, i->alignment_power);
1679 asect->compressed_size = size;
1683 /* Don't convert GOTPCREL relocations if TSEC isn't placed
1685 distance = (tsec->output_section->compressed_size
1686 - sec->output_section->compressed_size);
1690 /* Take PT_GNU_RELRO segment into account by adding
1692 if ((toff + distance + get_elf_backend_data (abfd)->maxpagesize
1693 - roff + 0x80000000) > 0xffffffff)
1700 /* We have "call/jmp *foo@GOTPCREL(%rip)". */
1705 /* Convert R_X86_64_GOTPCRELX and R_X86_64_REX_GOTPCRELX to
1707 modrm = bfd_get_8 (abfd, contents + roff - 1);
1710 /* Convert to "jmp foo nop". */
1713 nop_offset = irel->r_offset + 3;
1714 disp = bfd_get_32 (abfd, contents + irel->r_offset);
1715 irel->r_offset -= 1;
1716 bfd_put_32 (abfd, disp, contents + irel->r_offset);
1720 struct elf_x86_link_hash_entry *eh
1721 = (struct elf_x86_link_hash_entry *) h;
1723 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1726 /* To support TLS optimization, always use addr32 prefix for
1727 "call *__tls_get_addr@GOTPCREL(%rip)". */
1728 if (eh && eh->tls_get_addr)
1731 nop_offset = irel->r_offset - 2;
1735 nop = link_info->call_nop_byte;
1736 if (link_info->call_nop_as_suffix)
1738 nop_offset = irel->r_offset + 3;
1739 disp = bfd_get_32 (abfd, contents + irel->r_offset);
1740 irel->r_offset -= 1;
1741 bfd_put_32 (abfd, disp, contents + irel->r_offset);
1744 nop_offset = irel->r_offset - 2;
1747 bfd_put_8 (abfd, nop, contents + nop_offset);
1748 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1749 r_type = R_X86_64_PC32;
1754 unsigned int rex_mask = REX_R;
1756 if (r_type == R_X86_64_REX_GOTPCRELX)
1757 rex = bfd_get_8 (abfd, contents + roff - 3);
1765 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1766 "lea foo(%rip), %reg". */
1768 r_type = R_X86_64_PC32;
1772 /* Convert "mov foo@GOTPCREL(%rip), %reg" to
1773 "mov $foo, %reg". */
1775 modrm = bfd_get_8 (abfd, contents + roff - 1);
1776 modrm = 0xc0 | (modrm & 0x38) >> 3;
1777 if ((rex & REX_W) != 0
1778 && ABI_64_P (link_info->output_bfd))
1780 /* Keep the REX_W bit in REX byte for LP64. */
1781 r_type = R_X86_64_32S;
1782 goto rewrite_modrm_rex;
1786 /* If the REX_W bit in REX byte isn't needed,
1787 use R_X86_64_32 and clear the W bit to avoid
1788 sign-extend imm32 to imm64. */
1789 r_type = R_X86_64_32;
1790 /* Clear the W bit in REX byte. */
1792 goto rewrite_modrm_rex;
1798 /* R_X86_64_PC32 isn't supported. */
1802 modrm = bfd_get_8 (abfd, contents + roff - 1);
1805 /* Convert "test %reg, foo@GOTPCREL(%rip)" to
1806 "test $foo, %reg". */
1807 modrm = 0xc0 | (modrm & 0x38) >> 3;
1812 /* Convert "binop foo@GOTPCREL(%rip), %reg" to
1813 "binop $foo, %reg". */
1814 modrm = 0xc0 | (modrm & 0x38) >> 3 | (opcode & 0x3c);
1818 /* Use R_X86_64_32 with 32-bit operand to avoid relocation
1819 overflow when sign-extending imm32 to imm64. */
1820 r_type = (rex & REX_W) != 0 ? R_X86_64_32S : R_X86_64_32;
1823 bfd_put_8 (abfd, modrm, contents + roff - 1);
1827 /* Move the R bit to the B bit in REX byte. */
1828 rex = (rex & ~rex_mask) | (rex & REX_R) >> 2;
1829 bfd_put_8 (abfd, rex, contents + roff - 3);
1832 /* No addend for R_X86_64_32/R_X86_64_32S relocations. */
1836 bfd_put_8 (abfd, opcode, contents + roff - 2);
1839 irel->r_info = htab->r_info (r_symndx, r_type);
1846 /* Look through the relocs for a section during the first phase, and
1847 calculate needed space in the global offset table, procedure
1848 linkage table, and dynamic reloc sections. */
1851 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1853 const Elf_Internal_Rela *relocs)
1855 struct elf_x86_link_hash_table *htab;
1856 Elf_Internal_Shdr *symtab_hdr;
1857 struct elf_link_hash_entry **sym_hashes;
1858 const Elf_Internal_Rela *rel;
1859 const Elf_Internal_Rela *rel_end;
1863 if (bfd_link_relocatable (info))
1866 /* Don't do anything special with non-loaded, non-alloced sections.
1867 In particular, any relocs in such sections should not affect GOT
1868 and PLT reference counting (ie. we don't allow them to create GOT
1869 or PLT entries), there's no possibility or desire to optimize TLS
1870 relocs, and there's not much point in propagating relocs to shared
1871 libs that the dynamic linker won't relocate. */
1872 if ((sec->flags & SEC_ALLOC) == 0)
1875 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
1878 sec->check_relocs_failed = 1;
1882 BFD_ASSERT (is_x86_elf (abfd, htab));
1884 /* Get the section contents. */
1885 if (elf_section_data (sec)->this_hdr.contents != NULL)
1886 contents = elf_section_data (sec)->this_hdr.contents;
1887 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1889 sec->check_relocs_failed = 1;
1893 symtab_hdr = &elf_symtab_hdr (abfd);
1894 sym_hashes = elf_sym_hashes (abfd);
1898 rel_end = relocs + sec->reloc_count;
1899 for (rel = relocs; rel < rel_end; rel++)
1901 unsigned int r_type;
1902 unsigned int r_symndx;
1903 struct elf_link_hash_entry *h;
1904 struct elf_x86_link_hash_entry *eh;
1905 Elf_Internal_Sym *isym;
1907 bfd_boolean size_reloc;
1909 r_symndx = htab->r_sym (rel->r_info);
1910 r_type = ELF32_R_TYPE (rel->r_info);
1912 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1914 /* xgettext:c-format */
1915 _bfd_error_handler (_("%B: bad symbol index: %d"),
1920 if (r_symndx < symtab_hdr->sh_info)
1922 /* A local symbol. */
1923 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1928 /* Check relocation against local STT_GNU_IFUNC symbol. */
1929 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1931 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel,
1936 /* Fake a STT_GNU_IFUNC symbol. */
1937 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1939 h->type = STT_GNU_IFUNC;
1942 h->forced_local = 1;
1943 h->root.type = bfd_link_hash_defined;
1951 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1952 while (h->root.type == bfd_link_hash_indirect
1953 || h->root.type == bfd_link_hash_warning)
1954 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1957 /* Check invalid x32 relocations. */
1958 if (!ABI_64_P (abfd))
1964 case R_X86_64_DTPOFF64:
1965 case R_X86_64_TPOFF64:
1967 case R_X86_64_GOTOFF64:
1968 case R_X86_64_GOT64:
1969 case R_X86_64_GOTPCREL64:
1970 case R_X86_64_GOTPC64:
1971 case R_X86_64_GOTPLT64:
1972 case R_X86_64_PLTOFF64:
1975 name = h->root.root.string;
1977 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1980 /* xgettext:c-format */
1981 (_("%B: relocation %s against symbol `%s' isn't "
1982 "supported in x32 mode"), abfd,
1983 x86_64_elf_howto_table[r_type].name, name);
1984 bfd_set_error (bfd_error_bad_value);
1992 /* It is referenced by a non-shared object. */
1994 h->root.non_ir_ref_regular = 1;
1996 if (h->type == STT_GNU_IFUNC)
1997 elf_tdata (info->output_bfd)->has_gnu_symbols
1998 |= elf_gnu_symbol_ifunc;
2001 if (! elf_x86_64_tls_transition (info, abfd, sec, contents,
2002 symtab_hdr, sym_hashes,
2003 &r_type, GOT_UNKNOWN,
2004 rel, rel_end, h, r_symndx, FALSE))
2007 eh = (struct elf_x86_link_hash_entry *) h;
2010 case R_X86_64_TLSLD:
2011 htab->tls_ld_or_ldm_got.refcount += 1;
2014 case R_X86_64_TPOFF32:
2015 if (!bfd_link_executable (info) && ABI_64_P (abfd))
2016 return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym,
2017 &x86_64_elf_howto_table[r_type]);
2019 eh->has_got_reloc = 1;
2022 case R_X86_64_GOTTPOFF:
2023 if (!bfd_link_executable (info))
2024 info->flags |= DF_STATIC_TLS;
2027 case R_X86_64_GOT32:
2028 case R_X86_64_GOTPCREL:
2029 case R_X86_64_GOTPCRELX:
2030 case R_X86_64_REX_GOTPCRELX:
2031 case R_X86_64_TLSGD:
2032 case R_X86_64_GOT64:
2033 case R_X86_64_GOTPCREL64:
2034 case R_X86_64_GOTPLT64:
2035 case R_X86_64_GOTPC32_TLSDESC:
2036 case R_X86_64_TLSDESC_CALL:
2037 /* This symbol requires a global offset table entry. */
2039 int tls_type, old_tls_type;
2043 default: tls_type = GOT_NORMAL; break;
2044 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
2045 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
2046 case R_X86_64_GOTPC32_TLSDESC:
2047 case R_X86_64_TLSDESC_CALL:
2048 tls_type = GOT_TLS_GDESC; break;
2053 h->got.refcount += 1;
2054 old_tls_type = eh->tls_type;
2058 bfd_signed_vma *local_got_refcounts;
2060 /* This is a global offset table entry for a local symbol. */
2061 local_got_refcounts = elf_local_got_refcounts (abfd);
2062 if (local_got_refcounts == NULL)
2066 size = symtab_hdr->sh_info;
2067 size *= sizeof (bfd_signed_vma)
2068 + sizeof (bfd_vma) + sizeof (char);
2069 local_got_refcounts = ((bfd_signed_vma *)
2070 bfd_zalloc (abfd, size));
2071 if (local_got_refcounts == NULL)
2073 elf_local_got_refcounts (abfd) = local_got_refcounts;
2074 elf_x86_local_tlsdesc_gotent (abfd)
2075 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2076 elf_x86_local_got_tls_type (abfd)
2077 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2079 local_got_refcounts[r_symndx] += 1;
2081 = elf_x86_local_got_tls_type (abfd) [r_symndx];
2084 /* If a TLS symbol is accessed using IE at least once,
2085 there is no point to use dynamic model for it. */
2086 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2087 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2088 || tls_type != GOT_TLS_IE))
2090 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
2091 tls_type = old_tls_type;
2092 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2093 && GOT_TLS_GD_ANY_P (tls_type))
2094 tls_type |= old_tls_type;
2098 name = h->root.root.string;
2100 name = bfd_elf_sym_name (abfd, symtab_hdr,
2103 /* xgettext:c-format */
2104 (_("%B: '%s' accessed both as normal and"
2105 " thread local symbol"),
2107 bfd_set_error (bfd_error_bad_value);
2112 if (old_tls_type != tls_type)
2115 eh->tls_type = tls_type;
2117 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
2122 case R_X86_64_GOTOFF64:
2123 case R_X86_64_GOTPC32:
2124 case R_X86_64_GOTPC64:
2127 eh->has_got_reloc = 1;
2130 case R_X86_64_PLT32:
2131 case R_X86_64_PLT32_BND:
2132 /* This symbol requires a procedure linkage table entry. We
2133 actually build the entry in adjust_dynamic_symbol,
2134 because this might be a case of linking PIC code which is
2135 never referenced by a dynamic object, in which case we
2136 don't need to generate a procedure linkage table entry
2139 /* If this is a local symbol, we resolve it directly without
2140 creating a procedure linkage table entry. */
2144 eh->has_got_reloc = 1;
2146 h->plt.refcount += 1;
2149 case R_X86_64_PLTOFF64:
2150 /* This tries to form the 'address' of a function relative
2151 to GOT. For global symbols we need a PLT entry. */
2155 h->plt.refcount += 1;
2159 case R_X86_64_SIZE32:
2160 case R_X86_64_SIZE64:
2165 if (!ABI_64_P (abfd))
2171 /* Check relocation overflow as these relocs may lead to
2172 run-time relocation overflow. Don't error out for
2173 sections we don't care about, such as debug sections or
2174 when relocation overflow check is disabled. */
2175 if (!info->no_reloc_overflow_check
2176 && (bfd_link_pic (info)
2177 || (bfd_link_executable (info)
2181 && (sec->flags & SEC_READONLY) == 0)))
2182 return elf_x86_64_need_pic (info, abfd, sec, h, symtab_hdr, isym,
2183 &x86_64_elf_howto_table[r_type]);
2189 case R_X86_64_PC32_BND:
2193 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2194 eh->has_non_got_reloc = 1;
2195 /* We are called after all symbols have been resolved. Only
2196 relocation against STT_GNU_IFUNC symbol must go through
2199 && (bfd_link_executable (info)
2200 || h->type == STT_GNU_IFUNC))
2202 /* If this reloc is in a read-only section, we might
2203 need a copy reloc. We can't check reliably at this
2204 stage whether the section is read-only, as input
2205 sections have not yet been mapped to output sections.
2206 Tentatively set the flag for now, and correct in
2207 adjust_dynamic_symbol. */
2210 /* We may need a .plt entry if the symbol is a function
2211 defined in a shared lib or is a STT_GNU_IFUNC function
2212 referenced from the code or read-only section. */
2214 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
2215 h->plt.refcount += 1;
2217 if (r_type == R_X86_64_PC32)
2219 /* Since something like ".long foo - ." may be used
2220 as pointer, make sure that PLT is used if foo is
2221 a function defined in a shared library. */
2222 if ((sec->flags & SEC_CODE) == 0)
2223 h->pointer_equality_needed = 1;
2225 else if (r_type != R_X86_64_PC32_BND
2226 && r_type != R_X86_64_PC64)
2228 h->pointer_equality_needed = 1;
2229 /* At run-time, R_X86_64_64 can be resolved for both
2230 x86-64 and x32. But R_X86_64_32 and R_X86_64_32S
2231 can only be resolved for x32. */
2232 if ((sec->flags & SEC_READONLY) == 0
2233 && (r_type == R_X86_64_64
2234 || (!ABI_64_P (abfd)
2235 && (r_type == R_X86_64_32
2236 || r_type == R_X86_64_32S))))
2237 eh->func_pointer_refcount += 1;
2243 /* If we are creating a shared library, and this is a reloc
2244 against a global symbol, or a non PC relative reloc
2245 against a local symbol, then we need to copy the reloc
2246 into the shared library. However, if we are linking with
2247 -Bsymbolic, we do not need to copy a reloc against a
2248 global symbol which is defined in an object we are
2249 including in the link (i.e., DEF_REGULAR is set). At
2250 this point we have not seen all the input files, so it is
2251 possible that DEF_REGULAR is not set now but will be set
2252 later (it is never cleared). In case of a weak definition,
2253 DEF_REGULAR may be cleared later by a strong definition in
2254 a shared library. We account for that possibility below by
2255 storing information in the relocs_copied field of the hash
2256 table entry. A similar situation occurs when creating
2257 shared libraries and symbol visibility changes render the
2260 If on the other hand, we are creating an executable, we
2261 may need to keep relocations for symbols satisfied by a
2262 dynamic library if we manage to avoid copy relocs for the
2265 Generate dynamic pointer relocation against STT_GNU_IFUNC
2266 symbol in the non-code section. */
2267 if ((bfd_link_pic (info)
2268 && (! IS_X86_64_PCREL_TYPE (r_type)
2270 && (! (bfd_link_pie (info)
2271 || SYMBOLIC_BIND (info, h))
2272 || h->root.type == bfd_link_hash_defweak
2273 || !h->def_regular))))
2275 && h->type == STT_GNU_IFUNC
2276 && r_type == htab->pointer_r_type
2277 && (sec->flags & SEC_CODE) == 0)
2278 || (ELIMINATE_COPY_RELOCS
2279 && !bfd_link_pic (info)
2281 && (h->root.type == bfd_link_hash_defweak
2282 || !h->def_regular)))
2284 struct elf_dyn_relocs *p;
2285 struct elf_dyn_relocs **head;
2287 /* We must copy these reloc types into the output file.
2288 Create a reloc section in dynobj and make room for
2292 sreloc = _bfd_elf_make_dynamic_reloc_section
2293 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
2294 abfd, /*rela?*/ TRUE);
2300 /* If this is a global symbol, we count the number of
2301 relocations we need for this symbol. */
2303 head = &eh->dyn_relocs;
2306 /* Track dynamic relocs needed for local syms too.
2307 We really need local syms available to do this
2312 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2317 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2321 /* Beware of type punned pointers vs strict aliasing
2323 vpp = &(elf_section_data (s)->local_dynrel);
2324 head = (struct elf_dyn_relocs **)vpp;
2328 if (p == NULL || p->sec != sec)
2330 bfd_size_type amt = sizeof *p;
2332 p = ((struct elf_dyn_relocs *)
2333 bfd_alloc (htab->elf.dynobj, amt));
2344 /* Count size relocation as PC-relative relocation. */
2345 if (IS_X86_64_PCREL_TYPE (r_type) || size_reloc)
2350 /* This relocation describes the C++ object vtable hierarchy.
2351 Reconstruct it for later use during GC. */
2352 case R_X86_64_GNU_VTINHERIT:
2353 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2357 /* This relocation describes which C++ vtable entries are actually
2358 used. Record for later use during GC. */
2359 case R_X86_64_GNU_VTENTRY:
2360 BFD_ASSERT (h != NULL);
2362 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2370 if ((r_type == R_X86_64_GOTPCREL
2371 || r_type == R_X86_64_GOTPCRELX
2372 || r_type == R_X86_64_REX_GOTPCRELX)
2373 && (h == NULL || h->type != STT_GNU_IFUNC))
2374 sec->need_convert_load = 1;
2377 if (elf_section_data (sec)->this_hdr.contents != contents)
2379 if (!info->keep_memory)
2383 /* Cache the section contents for elf_link_input_bfd. */
2384 elf_section_data (sec)->this_hdr.contents = contents;
2391 if (elf_section_data (sec)->this_hdr.contents != contents)
2393 sec->check_relocs_failed = 1;
2397 /* Allocate space in .plt, .got and associated reloc sections for
2401 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2403 struct bfd_link_info *info;
2404 struct elf_x86_link_hash_table *htab;
2405 struct elf_x86_link_hash_entry *eh;
2406 struct elf_dyn_relocs *p;
2407 const struct elf_backend_data *bed;
2408 unsigned int plt_entry_size;
2409 bfd_boolean resolved_to_zero;
2411 if (h->root.type == bfd_link_hash_indirect)
2414 eh = (struct elf_x86_link_hash_entry *) h;
2416 info = (struct bfd_link_info *) inf;
2417 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
2420 bed = get_elf_backend_data (info->output_bfd);
2422 plt_entry_size = htab->plt.plt_entry_size;
2424 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2429 /* We can't use the GOT PLT if pointer equality is needed since
2430 finish_dynamic_symbol won't clear symbol value and the dynamic
2431 linker won't update the GOT slot. We will get into an infinite
2432 loop at run-time. */
2433 if (htab->plt_got != NULL
2434 && h->type != STT_GNU_IFUNC
2435 && !h->pointer_equality_needed
2436 && h->plt.refcount > 0
2437 && h->got.refcount > 0)
2439 /* Don't use the regular PLT if there are both GOT and GOTPLT
2441 h->plt.offset = (bfd_vma) -1;
2443 /* Use the GOT PLT. */
2444 eh->plt_got.refcount = 1;
2447 /* Clear the reference count of function pointer relocations if
2448 symbol isn't a normal function. */
2449 if (h->type != STT_FUNC)
2450 eh->func_pointer_refcount = 0;
2452 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2453 here if it is defined and referenced in a non-shared object. */
2454 if (h->type == STT_GNU_IFUNC
2457 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2459 &htab->readonly_dynrelocs_against_ifunc,
2463 GOT_ENTRY_SIZE, TRUE))
2465 asection *s = htab->plt_second;
2466 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2468 /* Use the second PLT section if it is created. */
2469 eh->plt_second.offset = s->size;
2471 /* Make room for this entry in the second PLT section. */
2472 s->size += htab->non_lazy_plt->plt_entry_size;
2480 /* Don't create the PLT entry if there are only function pointer
2481 relocations which can be resolved at run-time. */
2482 else if (htab->elf.dynamic_sections_created
2483 && (h->plt.refcount > eh->func_pointer_refcount
2484 || eh->plt_got.refcount > 0))
2486 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
2488 /* Clear the reference count of function pointer relocations
2490 eh->func_pointer_refcount = 0;
2492 /* Make sure this symbol is output as a dynamic symbol.
2493 Undefined weak syms won't yet be marked as dynamic. */
2494 if (h->dynindx == -1
2496 && !resolved_to_zero
2497 && h->root.type == bfd_link_hash_undefweak)
2499 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2503 if (bfd_link_pic (info)
2504 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2506 asection *s = htab->elf.splt;
2507 asection *second_s = htab->plt_second;
2508 asection *got_s = htab->plt_got;
2510 /* If this is the first .plt entry, make room for the special
2511 first entry. The .plt section is used by prelink to undo
2512 prelinking for dynamic relocations. */
2514 s->size = htab->plt.has_plt0 * plt_entry_size;
2517 eh->plt_got.offset = got_s->size;
2520 h->plt.offset = s->size;
2522 eh->plt_second.offset = second_s->size;
2525 /* If this symbol is not defined in a regular file, and we are
2526 not generating a shared library, then set the symbol to this
2527 location in the .plt. This is required to make function
2528 pointers compare as equal between the normal executable and
2529 the shared library. */
2530 if (! bfd_link_pic (info)
2535 /* We need to make a call to the entry of the GOT PLT
2536 instead of regular PLT entry. */
2537 h->root.u.def.section = got_s;
2538 h->root.u.def.value = eh->plt_got.offset;
2544 /* We need to make a call to the entry of the
2545 second PLT instead of regular PLT entry. */
2546 h->root.u.def.section = second_s;
2547 h->root.u.def.value = eh->plt_second.offset;
2551 h->root.u.def.section = s;
2552 h->root.u.def.value = h->plt.offset;
2557 /* Make room for this entry. */
2559 got_s->size += htab->non_lazy_plt->plt_entry_size;
2562 s->size += plt_entry_size;
2564 second_s->size += htab->non_lazy_plt->plt_entry_size;
2566 /* We also need to make an entry in the .got.plt section,
2567 which will be placed in the .got section by the linker
2569 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
2571 /* There should be no PLT relocation against resolved
2572 undefined weak symbol in executable. */
2573 if (!resolved_to_zero)
2575 /* We also need to make an entry in the .rela.plt
2577 htab->elf.srelplt->size += bed->s->sizeof_rela;
2578 htab->elf.srelplt->reloc_count++;
2584 eh->plt_got.offset = (bfd_vma) -1;
2585 h->plt.offset = (bfd_vma) -1;
2591 eh->plt_got.offset = (bfd_vma) -1;
2592 h->plt.offset = (bfd_vma) -1;
2596 eh->tlsdesc_got = (bfd_vma) -1;
2598 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2599 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2600 if (h->got.refcount > 0
2601 && bfd_link_executable (info)
2603 && elf_x86_hash_entry (h)->tls_type == GOT_TLS_IE)
2605 h->got.offset = (bfd_vma) -1;
2607 else if (h->got.refcount > 0)
2611 int tls_type = elf_x86_hash_entry (h)->tls_type;
2613 /* Make sure this symbol is output as a dynamic symbol.
2614 Undefined weak syms won't yet be marked as dynamic. */
2615 if (h->dynindx == -1
2617 && !resolved_to_zero
2618 && h->root.type == bfd_link_hash_undefweak)
2620 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2624 if (GOT_TLS_GDESC_P (tls_type))
2626 eh->tlsdesc_got = htab->elf.sgotplt->size
2627 - elf_x86_compute_jump_table_size (htab);
2628 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
2629 h->got.offset = (bfd_vma) -2;
2631 if (! GOT_TLS_GDESC_P (tls_type)
2632 || GOT_TLS_GD_P (tls_type))
2635 h->got.offset = s->size;
2636 s->size += GOT_ENTRY_SIZE;
2637 if (GOT_TLS_GD_P (tls_type))
2638 s->size += GOT_ENTRY_SIZE;
2640 dyn = htab->elf.dynamic_sections_created;
2641 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2642 and two if global. R_X86_64_GOTTPOFF needs one dynamic
2643 relocation. No dynamic relocation against resolved undefined
2644 weak symbol in executable. */
2645 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2646 || tls_type == GOT_TLS_IE)
2647 htab->elf.srelgot->size += bed->s->sizeof_rela;
2648 else if (GOT_TLS_GD_P (tls_type))
2649 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
2650 else if (! GOT_TLS_GDESC_P (tls_type)
2651 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2652 && !resolved_to_zero)
2653 || h->root.type != bfd_link_hash_undefweak)
2654 && (bfd_link_pic (info)
2655 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2656 htab->elf.srelgot->size += bed->s->sizeof_rela;
2657 if (GOT_TLS_GDESC_P (tls_type))
2659 htab->elf.srelplt->size += bed->s->sizeof_rela;
2660 htab->tlsdesc_plt = (bfd_vma) -1;
2664 h->got.offset = (bfd_vma) -1;
2666 if (eh->dyn_relocs == NULL)
2669 /* In the shared -Bsymbolic case, discard space allocated for
2670 dynamic pc-relative relocs against symbols which turn out to be
2671 defined in regular objects. For the normal shared case, discard
2672 space for pc-relative relocs that have become local due to symbol
2673 visibility changes. */
2675 if (bfd_link_pic (info))
2677 /* Relocs that use pc_count are those that appear on a call
2678 insn, or certain REL relocs that can generated via assembly.
2679 We want calls to protected symbols to resolve directly to the
2680 function rather than going via the plt. If people want
2681 function pointer comparisons to work as expected then they
2682 should avoid writing weird assembly. */
2683 if (SYMBOL_CALLS_LOCAL (info, h))
2685 struct elf_dyn_relocs **pp;
2687 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2689 p->count -= p->pc_count;
2698 /* Also discard relocs on undefined weak syms with non-default
2699 visibility or in PIE. */
2700 if (eh->dyn_relocs != NULL)
2702 if (h->root.type == bfd_link_hash_undefweak)
2704 /* Undefined weak symbol is never bound locally in shared
2706 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2707 || resolved_to_zero)
2708 eh->dyn_relocs = NULL;
2709 else if (h->dynindx == -1
2710 && ! h->forced_local
2711 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2714 /* For PIE, discard space for pc-relative relocs against
2715 symbols which turn out to need copy relocs. */
2716 else if (bfd_link_executable (info)
2717 && (h->needs_copy || eh->needs_copy)
2721 struct elf_dyn_relocs **pp;
2723 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2725 if (p->pc_count != 0)
2733 else if (ELIMINATE_COPY_RELOCS)
2735 /* For the non-shared case, discard space for relocs against
2736 symbols which turn out to need copy relocs or are not
2737 dynamic. Keep dynamic relocations for run-time function
2738 pointer initialization. */
2740 if ((!h->non_got_ref
2741 || eh->func_pointer_refcount > 0
2742 || (h->root.type == bfd_link_hash_undefweak
2743 && !resolved_to_zero))
2746 || (htab->elf.dynamic_sections_created
2747 && (h->root.type == bfd_link_hash_undefweak
2748 || h->root.type == bfd_link_hash_undefined))))
2750 /* Make sure this symbol is output as a dynamic symbol.
2751 Undefined weak syms won't yet be marked as dynamic. */
2752 if (h->dynindx == -1
2753 && ! h->forced_local
2754 && ! resolved_to_zero
2755 && h->root.type == bfd_link_hash_undefweak
2756 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2759 /* If that succeeded, we know we'll be keeping all the
2761 if (h->dynindx != -1)
2765 eh->dyn_relocs = NULL;
2766 eh->func_pointer_refcount = 0;
2771 /* Finally, allocate space. */
2772 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2776 sreloc = elf_section_data (p->sec)->sreloc;
2778 BFD_ASSERT (sreloc != NULL);
2780 sreloc->size += p->count * bed->s->sizeof_rela;
2786 /* Allocate space in .plt, .got and associated reloc sections for
2787 local dynamic relocs. */
2790 elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
2792 struct elf_link_hash_entry *h
2793 = (struct elf_link_hash_entry *) *slot;
2795 if (h->type != STT_GNU_IFUNC
2799 || h->root.type != bfd_link_hash_defined)
2802 return elf_x86_64_allocate_dynrelocs (h, inf);
2805 /* Convert load via the GOT slot to load immediate. */
2808 elf_x86_64_convert_load (bfd *abfd, asection *sec,
2809 struct bfd_link_info *link_info)
2811 Elf_Internal_Shdr *symtab_hdr;
2812 Elf_Internal_Rela *internal_relocs;
2813 Elf_Internal_Rela *irel, *irelend;
2815 struct elf_x86_link_hash_table *htab;
2816 bfd_boolean changed;
2817 bfd_signed_vma *local_got_refcounts;
2819 /* Don't even try to convert non-ELF outputs. */
2820 if (!is_elf_hash_table (link_info->hash))
2823 /* Nothing to do if there is no need or no output. */
2824 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2825 || sec->need_convert_load == 0
2826 || bfd_is_abs_section (sec->output_section))
2829 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2831 /* Load the relocations for this section. */
2832 internal_relocs = (_bfd_elf_link_read_relocs
2833 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2834 link_info->keep_memory));
2835 if (internal_relocs == NULL)
2839 htab = elf_x86_hash_table (link_info, X86_64_ELF_DATA);
2840 local_got_refcounts = elf_local_got_refcounts (abfd);
2842 /* Get the section contents. */
2843 if (elf_section_data (sec)->this_hdr.contents != NULL)
2844 contents = elf_section_data (sec)->this_hdr.contents;
2847 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2851 irelend = internal_relocs + sec->reloc_count;
2852 for (irel = internal_relocs; irel < irelend; irel++)
2854 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2855 unsigned int r_symndx;
2856 struct elf_link_hash_entry *h;
2857 bfd_boolean converted;
2859 if (r_type != R_X86_64_GOTPCRELX
2860 && r_type != R_X86_64_REX_GOTPCRELX
2861 && r_type != R_X86_64_GOTPCREL)
2864 r_symndx = htab->r_sym (irel->r_info);
2865 if (r_symndx < symtab_hdr->sh_info)
2866 h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
2867 (const Elf_Internal_Rela *) irel,
2871 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
2872 while (h->root.type == bfd_link_hash_indirect
2873 || h->root.type == bfd_link_hash_warning)
2874 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2877 /* STT_GNU_IFUNC must keep GOTPCREL relocations. */
2878 if (h != NULL && h->type == STT_GNU_IFUNC)
2882 if (!elf_x86_64_convert_load_reloc (abfd, sec, contents, irel, h,
2883 &converted, link_info))
2888 changed = converted;
2891 if (h->got.refcount > 0)
2892 h->got.refcount -= 1;
2896 if (local_got_refcounts != NULL
2897 && local_got_refcounts[r_symndx] > 0)
2898 local_got_refcounts[r_symndx] -= 1;
2903 if (contents != NULL
2904 && elf_section_data (sec)->this_hdr.contents != contents)
2906 if (!changed && !link_info->keep_memory)
2910 /* Cache the section contents for elf_link_input_bfd. */
2911 elf_section_data (sec)->this_hdr.contents = contents;
2915 if (elf_section_data (sec)->relocs != internal_relocs)
2918 free (internal_relocs);
2920 elf_section_data (sec)->relocs = internal_relocs;
2926 if (contents != NULL
2927 && elf_section_data (sec)->this_hdr.contents != contents)
2929 if (internal_relocs != NULL
2930 && elf_section_data (sec)->relocs != internal_relocs)
2931 free (internal_relocs);
2935 /* Set the sizes of the dynamic sections. */
2938 elf_x86_64_size_dynamic_sections (bfd *output_bfd,
2939 struct bfd_link_info *info)
2941 struct elf_x86_link_hash_table *htab;
2946 const struct elf_backend_data *bed;
2948 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
2951 bed = get_elf_backend_data (output_bfd);
2953 dynobj = htab->elf.dynobj;
2957 /* Set up .got offsets for local syms, and space for local dynamic
2959 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2961 bfd_signed_vma *local_got;
2962 bfd_signed_vma *end_local_got;
2963 char *local_tls_type;
2964 bfd_vma *local_tlsdesc_gotent;
2965 bfd_size_type locsymcount;
2966 Elf_Internal_Shdr *symtab_hdr;
2969 if (! is_x86_elf (ibfd, htab))
2972 for (s = ibfd->sections; s != NULL; s = s->next)
2974 struct elf_dyn_relocs *p;
2976 if (!elf_x86_64_convert_load (ibfd, s, info))
2979 for (p = (struct elf_dyn_relocs *)
2980 (elf_section_data (s)->local_dynrel);
2984 if (!bfd_is_abs_section (p->sec)
2985 && bfd_is_abs_section (p->sec->output_section))
2987 /* Input section has been discarded, either because
2988 it is a copy of a linkonce section or due to
2989 linker script /DISCARD/, so we'll be discarding
2992 else if (p->count != 0)
2994 srel = elf_section_data (p->sec)->sreloc;
2995 srel->size += p->count * bed->s->sizeof_rela;
2996 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2997 && (info->flags & DF_TEXTREL) == 0)
2999 info->flags |= DF_TEXTREL;
3000 if ((info->warn_shared_textrel && bfd_link_pic (info))
3001 || info->error_textrel)
3002 /* xgettext:c-format */
3003 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3004 p->sec->owner, p->sec);
3010 local_got = elf_local_got_refcounts (ibfd);
3014 symtab_hdr = &elf_symtab_hdr (ibfd);
3015 locsymcount = symtab_hdr->sh_info;
3016 end_local_got = local_got + locsymcount;
3017 local_tls_type = elf_x86_local_got_tls_type (ibfd);
3018 local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd);
3020 srel = htab->elf.srelgot;
3021 for (; local_got < end_local_got;
3022 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3024 *local_tlsdesc_gotent = (bfd_vma) -1;
3027 if (GOT_TLS_GDESC_P (*local_tls_type))
3029 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3030 - elf_x86_compute_jump_table_size (htab);
3031 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
3032 *local_got = (bfd_vma) -2;
3034 if (! GOT_TLS_GDESC_P (*local_tls_type)
3035 || GOT_TLS_GD_P (*local_tls_type))
3037 *local_got = s->size;
3038 s->size += GOT_ENTRY_SIZE;
3039 if (GOT_TLS_GD_P (*local_tls_type))
3040 s->size += GOT_ENTRY_SIZE;
3042 if (bfd_link_pic (info)
3043 || GOT_TLS_GD_ANY_P (*local_tls_type)
3044 || *local_tls_type == GOT_TLS_IE)
3046 if (GOT_TLS_GDESC_P (*local_tls_type))
3048 htab->elf.srelplt->size
3049 += bed->s->sizeof_rela;
3050 htab->tlsdesc_plt = (bfd_vma) -1;
3052 if (! GOT_TLS_GDESC_P (*local_tls_type)
3053 || GOT_TLS_GD_P (*local_tls_type))
3054 srel->size += bed->s->sizeof_rela;
3058 *local_got = (bfd_vma) -1;
3062 if (htab->tls_ld_or_ldm_got.refcount > 0)
3064 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
3066 htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size;
3067 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
3068 htab->elf.srelgot->size += bed->s->sizeof_rela;
3071 htab->tls_ld_or_ldm_got.offset = -1;
3073 /* Allocate global sym .plt and .got entries, and space for global
3074 sym dynamic relocs. */
3075 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
3078 /* Allocate .plt and .got entries, and space for local symbols. */
3079 htab_traverse (htab->loc_hash_table,
3080 elf_x86_64_allocate_local_dynrelocs,
3083 /* For every jump slot reserved in the sgotplt, reloc_count is
3084 incremented. However, when we reserve space for TLS descriptors,
3085 it's not incremented, so in order to compute the space reserved
3086 for them, it suffices to multiply the reloc count by the jump
3089 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3090 so that R_X86_64_IRELATIVE entries come last. */
3091 if (htab->elf.srelplt)
3093 htab->sgotplt_jump_table_size
3094 = elf_x86_compute_jump_table_size (htab);
3095 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3097 else if (htab->elf.irelplt)
3098 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3100 if (htab->tlsdesc_plt)
3102 /* If we're not using lazy TLS relocations, don't generate the
3103 PLT and GOT entries they require. */
3104 if ((info->flags & DF_BIND_NOW))
3105 htab->tlsdesc_plt = 0;
3108 htab->tlsdesc_got = htab->elf.sgot->size;
3109 htab->elf.sgot->size += GOT_ENTRY_SIZE;
3110 /* Reserve room for the initial entry.
3111 FIXME: we could probably do away with it in this case. */
3112 if (htab->elf.splt->size == 0)
3113 htab->elf.splt->size = htab->plt.plt_entry_size;
3114 htab->tlsdesc_plt = htab->elf.splt->size;
3115 htab->elf.splt->size += htab->plt.plt_entry_size;
3119 if (htab->elf.sgotplt)
3121 /* Don't allocate .got.plt section if there are no GOT nor PLT
3122 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
3123 if ((htab->elf.hgot == NULL
3124 || !htab->elf.hgot->ref_regular_nonweak)
3125 && (htab->elf.sgotplt->size
3126 == get_elf_backend_data (output_bfd)->got_header_size)
3127 && (htab->elf.splt == NULL
3128 || htab->elf.splt->size == 0)
3129 && (htab->elf.sgot == NULL
3130 || htab->elf.sgot->size == 0)
3131 && (htab->elf.iplt == NULL
3132 || htab->elf.iplt->size == 0)
3133 && (htab->elf.igotplt == NULL
3134 || htab->elf.igotplt->size == 0))
3135 htab->elf.sgotplt->size = 0;
3138 if (_bfd_elf_eh_frame_present (info))
3140 if (htab->plt_eh_frame != NULL
3141 && htab->elf.splt != NULL
3142 && htab->elf.splt->size != 0
3143 && !bfd_is_abs_section (htab->elf.splt->output_section))
3144 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
3146 if (htab->plt_got_eh_frame != NULL
3147 && htab->plt_got != NULL
3148 && htab->plt_got->size != 0
3149 && !bfd_is_abs_section (htab->plt_got->output_section))
3150 htab->plt_got_eh_frame->size
3151 = htab->non_lazy_plt->eh_frame_plt_size;
3153 /* Unwind info for the second PLT and .plt.got sections are
3155 if (htab->plt_second_eh_frame != NULL
3156 && htab->plt_second != NULL
3157 && htab->plt_second->size != 0
3158 && !bfd_is_abs_section (htab->plt_second->output_section))
3159 htab->plt_second_eh_frame->size
3160 = htab->non_lazy_plt->eh_frame_plt_size;
3163 /* We now have determined the sizes of the various dynamic sections.
3164 Allocate memory for them. */
3166 for (s = dynobj->sections; s != NULL; s = s->next)
3168 if ((s->flags & SEC_LINKER_CREATED) == 0)
3171 if (s == htab->elf.splt
3172 || s == htab->elf.sgot
3173 || s == htab->elf.sgotplt
3174 || s == htab->elf.iplt
3175 || s == htab->elf.igotplt
3176 || s == htab->plt_second
3177 || s == htab->plt_got
3178 || s == htab->plt_eh_frame
3179 || s == htab->plt_got_eh_frame
3180 || s == htab->plt_second_eh_frame
3181 || s == htab->elf.sdynbss
3182 || s == htab->elf.sdynrelro)
3184 /* Strip this section if we don't need it; see the
3187 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
3189 if (s->size != 0 && s != htab->elf.srelplt)
3192 /* We use the reloc_count field as a counter if we need
3193 to copy relocs into the output file. */
3194 if (s != htab->elf.srelplt)
3199 /* It's not one of our sections, so don't allocate space. */
3205 /* If we don't need this section, strip it from the
3206 output file. This is mostly to handle .rela.bss and
3207 .rela.plt. We must create both sections in
3208 create_dynamic_sections, because they must be created
3209 before the linker maps input sections to output
3210 sections. The linker does that before
3211 adjust_dynamic_symbol is called, and it is that
3212 function which decides whether anything needs to go
3213 into these sections. */
3215 s->flags |= SEC_EXCLUDE;
3219 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3222 /* Allocate memory for the section contents. We use bfd_zalloc
3223 here in case unused entries are not reclaimed before the
3224 section's contents are written out. This should not happen,
3225 but this way if it does, we get a R_X86_64_NONE reloc instead
3227 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3228 if (s->contents == NULL)
3232 if (htab->plt_eh_frame != NULL
3233 && htab->plt_eh_frame->contents != NULL)
3235 memcpy (htab->plt_eh_frame->contents,
3236 htab->plt.eh_frame_plt, htab->plt_eh_frame->size);
3237 bfd_put_32 (dynobj, htab->elf.splt->size,
3238 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3241 if (htab->plt_got_eh_frame != NULL
3242 && htab->plt_got_eh_frame->contents != NULL)
3244 memcpy (htab->plt_got_eh_frame->contents,
3245 htab->non_lazy_plt->eh_frame_plt,
3246 htab->plt_got_eh_frame->size);
3247 bfd_put_32 (dynobj, htab->plt_got->size,
3248 (htab->plt_got_eh_frame->contents
3249 + PLT_FDE_LEN_OFFSET));
3252 if (htab->plt_second_eh_frame != NULL
3253 && htab->plt_second_eh_frame->contents != NULL)
3255 memcpy (htab->plt_second_eh_frame->contents,
3256 htab->non_lazy_plt->eh_frame_plt,
3257 htab->plt_second_eh_frame->size);
3258 bfd_put_32 (dynobj, htab->plt_second->size,
3259 (htab->plt_second_eh_frame->contents
3260 + PLT_FDE_LEN_OFFSET));
3263 if (htab->elf.dynamic_sections_created)
3265 /* Add some entries to the .dynamic section. We fill in the
3266 values later, in elf_x86_64_finish_dynamic_sections, but we
3267 must add the entries now so that we get the correct size for
3268 the .dynamic section. The DT_DEBUG entry is filled in by the
3269 dynamic linker and used by the debugger. */
3270 #define add_dynamic_entry(TAG, VAL) \
3271 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3273 if (bfd_link_executable (info))
3275 if (!add_dynamic_entry (DT_DEBUG, 0))
3279 if (htab->elf.splt->size != 0)
3281 /* DT_PLTGOT is used by prelink even if there is no PLT
3283 if (!add_dynamic_entry (DT_PLTGOT, 0))
3287 if (htab->elf.srelplt->size != 0)
3289 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3290 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3291 || !add_dynamic_entry (DT_JMPREL, 0))
3295 if (htab->tlsdesc_plt
3296 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
3297 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
3302 if (!add_dynamic_entry (DT_RELA, 0)
3303 || !add_dynamic_entry (DT_RELASZ, 0)
3304 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
3307 /* If any dynamic relocs apply to a read-only section,
3308 then we need a DT_TEXTREL entry. */
3309 if ((info->flags & DF_TEXTREL) == 0)
3310 elf_link_hash_traverse (&htab->elf,
3311 _bfd_x86_elf_readonly_dynrelocs,
3314 if ((info->flags & DF_TEXTREL) != 0)
3316 if (htab->readonly_dynrelocs_against_ifunc)
3318 info->callbacks->einfo
3319 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3320 bfd_set_error (bfd_error_bad_value);
3324 if (!add_dynamic_entry (DT_TEXTREL, 0))
3329 #undef add_dynamic_entry
3334 /* Return the relocation value for @tpoff relocation
3335 if STT_TLS virtual address is ADDRESS. */
3338 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
3340 struct elf_link_hash_table *htab = elf_hash_table (info);
3341 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3342 bfd_vma static_tls_size;
3344 /* If tls_segment is NULL, we should have signalled an error already. */
3345 if (htab->tls_sec == NULL)
3348 /* Consider special static TLS alignment requirements. */
3349 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3350 return address - static_tls_size - htab->tls_sec->vma;
3353 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3357 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3359 /* Opcode Instruction
3362 0x0f 0x8x conditional jump */
3364 && (contents [offset - 1] == 0xe8
3365 || contents [offset - 1] == 0xe9))
3367 && contents [offset - 2] == 0x0f
3368 && (contents [offset - 1] & 0xf0) == 0x80));
3371 /* Relocate an x86_64 ELF section. */
3374 elf_x86_64_relocate_section (bfd *output_bfd,
3375 struct bfd_link_info *info,
3377 asection *input_section,
3379 Elf_Internal_Rela *relocs,
3380 Elf_Internal_Sym *local_syms,
3381 asection **local_sections)
3383 struct elf_x86_link_hash_table *htab;
3384 Elf_Internal_Shdr *symtab_hdr;
3385 struct elf_link_hash_entry **sym_hashes;
3386 bfd_vma *local_got_offsets;
3387 bfd_vma *local_tlsdesc_gotents;
3388 Elf_Internal_Rela *rel;
3389 Elf_Internal_Rela *wrel;
3390 Elf_Internal_Rela *relend;
3391 unsigned int plt_entry_size;
3393 /* Skip if check_relocs failed. */
3394 if (input_section->check_relocs_failed)
3397 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
3401 BFD_ASSERT (is_x86_elf (input_bfd, htab));
3403 plt_entry_size = htab->plt.plt_entry_size;
3404 symtab_hdr = &elf_symtab_hdr (input_bfd);
3405 sym_hashes = elf_sym_hashes (input_bfd);
3406 local_got_offsets = elf_local_got_offsets (input_bfd);
3407 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3409 _bfd_x86_elf_set_tls_module_base (info);
3411 rel = wrel = relocs;
3412 relend = relocs + input_section->reloc_count;
3413 for (; rel < relend; wrel++, rel++)
3415 unsigned int r_type;
3416 reloc_howto_type *howto;
3417 unsigned long r_symndx;
3418 struct elf_link_hash_entry *h;
3419 struct elf_x86_link_hash_entry *eh;
3420 Elf_Internal_Sym *sym;
3422 bfd_vma off, offplt, plt_offset;
3424 bfd_boolean unresolved_reloc;
3425 bfd_reloc_status_type r;
3427 asection *base_got, *resolved_plt;
3429 bfd_boolean resolved_to_zero;
3430 bfd_boolean relative_reloc;
3432 r_type = ELF32_R_TYPE (rel->r_info);
3433 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3434 || r_type == (int) R_X86_64_GNU_VTENTRY)
3441 if (r_type >= (int) R_X86_64_standard)
3442 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
3444 if (r_type != (int) R_X86_64_32
3445 || ABI_64_P (output_bfd))
3446 howto = x86_64_elf_howto_table + r_type;
3448 howto = (x86_64_elf_howto_table
3449 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
3450 r_symndx = htab->r_sym (rel->r_info);
3454 unresolved_reloc = FALSE;
3455 if (r_symndx < symtab_hdr->sh_info)
3457 sym = local_syms + r_symndx;
3458 sec = local_sections[r_symndx];
3460 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3462 st_size = sym->st_size;
3464 /* Relocate against local STT_GNU_IFUNC symbol. */
3465 if (!bfd_link_relocatable (info)
3466 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3468 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd,
3473 /* Set STT_GNU_IFUNC symbol value. */
3474 h->root.u.def.value = sym->st_value;
3475 h->root.u.def.section = sec;
3480 bfd_boolean warned ATTRIBUTE_UNUSED;
3481 bfd_boolean ignored ATTRIBUTE_UNUSED;
3483 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3484 r_symndx, symtab_hdr, sym_hashes,
3486 unresolved_reloc, warned, ignored);
3490 if (sec != NULL && discarded_section (sec))
3492 _bfd_clear_contents (howto, input_bfd, input_section,
3493 contents + rel->r_offset);
3494 wrel->r_offset = rel->r_offset;
3498 /* For ld -r, remove relocations in debug sections against
3499 sections defined in discarded sections. Not done for
3500 eh_frame editing code expects to be present. */
3501 if (bfd_link_relocatable (info)
3502 && (input_section->flags & SEC_DEBUGGING))
3508 if (bfd_link_relocatable (info))
3515 if (rel->r_addend == 0 && !ABI_64_P (output_bfd))
3517 if (r_type == R_X86_64_64)
3519 /* For x32, treat R_X86_64_64 like R_X86_64_32 and
3520 zero-extend it to 64bit if addend is zero. */
3521 r_type = R_X86_64_32;
3522 memset (contents + rel->r_offset + 4, 0, 4);
3524 else if (r_type == R_X86_64_SIZE64)
3526 /* For x32, treat R_X86_64_SIZE64 like R_X86_64_SIZE32 and
3527 zero-extend it to 64bit if addend is zero. */
3528 r_type = R_X86_64_SIZE32;
3529 memset (contents + rel->r_offset + 4, 0, 4);
3533 eh = (struct elf_x86_link_hash_entry *) h;
3535 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3536 it here if it is defined in a non-shared object. */
3538 && h->type == STT_GNU_IFUNC
3544 if ((input_section->flags & SEC_ALLOC) == 0)
3546 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3547 sections because such sections are not SEC_ALLOC and
3548 thus ld.so will not process them. */
3549 if ((input_section->flags & SEC_DEBUGGING) != 0)
3559 case R_X86_64_GOTPCREL:
3560 case R_X86_64_GOTPCRELX:
3561 case R_X86_64_REX_GOTPCRELX:
3562 case R_X86_64_GOTPCREL64:
3563 base_got = htab->elf.sgot;
3564 off = h->got.offset;
3566 if (base_got == NULL)
3569 if (off == (bfd_vma) -1)
3571 /* We can't use h->got.offset here to save state, or
3572 even just remember the offset, as finish_dynamic_symbol
3573 would use that as offset into .got. */
3575 if (h->plt.offset == (bfd_vma) -1)
3578 if (htab->elf.splt != NULL)
3580 plt_index = (h->plt.offset / plt_entry_size
3581 - htab->plt.has_plt0);
3582 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3583 base_got = htab->elf.sgotplt;
3587 plt_index = h->plt.offset / plt_entry_size;
3588 off = plt_index * GOT_ENTRY_SIZE;
3589 base_got = htab->elf.igotplt;
3592 if (h->dynindx == -1
3596 /* This references the local defitionion. We must
3597 initialize this entry in the global offset table.
3598 Since the offset must always be a multiple of 8,
3599 we use the least significant bit to record
3600 whether we have initialized it already.
3602 When doing a dynamic link, we create a .rela.got
3603 relocation entry to initialize the value. This
3604 is done in the finish_dynamic_symbol routine. */
3609 bfd_put_64 (output_bfd, relocation,
3610 base_got->contents + off);
3611 /* Note that this is harmless for the GOTPLT64
3612 case, as -1 | 1 still is -1. */
3618 relocation = (base_got->output_section->vma
3619 + base_got->output_offset + off);
3624 if (h->plt.offset == (bfd_vma) -1)
3626 /* Handle static pointers of STT_GNU_IFUNC symbols. */
3627 if (r_type == htab->pointer_r_type
3628 && (input_section->flags & SEC_CODE) == 0)
3629 goto do_ifunc_pointer;
3630 goto bad_ifunc_reloc;
3633 /* STT_GNU_IFUNC symbol must go through PLT. */
3634 if (htab->elf.splt != NULL)
3636 if (htab->plt_second != NULL)
3638 resolved_plt = htab->plt_second;
3639 plt_offset = eh->plt_second.offset;
3643 resolved_plt = htab->elf.splt;
3644 plt_offset = h->plt.offset;
3649 resolved_plt = htab->elf.iplt;
3650 plt_offset = h->plt.offset;
3653 relocation = (resolved_plt->output_section->vma
3654 + resolved_plt->output_offset + plt_offset);
3660 if (h->root.root.string)
3661 name = h->root.root.string;
3663 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3666 /* xgettext:c-format */
3667 (_("%B: relocation %s against STT_GNU_IFUNC "
3668 "symbol `%s' isn't supported"), input_bfd,
3670 bfd_set_error (bfd_error_bad_value);
3674 if (bfd_link_pic (info))
3679 if (ABI_64_P (output_bfd))
3684 if (rel->r_addend != 0)
3686 if (h->root.root.string)
3687 name = h->root.root.string;
3689 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3692 /* xgettext:c-format */
3693 (_("%B: relocation %s against STT_GNU_IFUNC "
3694 "symbol `%s' has non-zero addend: %Ld"),
3695 input_bfd, howto->name, name, rel->r_addend);
3696 bfd_set_error (bfd_error_bad_value);
3700 /* Generate dynamic relcoation only when there is a
3701 non-GOT reference in a shared object or there is no
3703 if ((bfd_link_pic (info) && h->non_got_ref)
3704 || h->plt.offset == (bfd_vma) -1)
3706 Elf_Internal_Rela outrel;
3709 /* Need a dynamic relocation to get the real function
3711 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
3715 if (outrel.r_offset == (bfd_vma) -1
3716 || outrel.r_offset == (bfd_vma) -2)
3719 outrel.r_offset += (input_section->output_section->vma
3720 + input_section->output_offset);
3722 if (h->dynindx == -1
3724 || bfd_link_executable (info))
3726 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
3727 h->root.root.string,
3728 h->root.u.def.section->owner);
3730 /* This symbol is resolved locally. */
3731 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
3732 outrel.r_addend = (h->root.u.def.value
3733 + h->root.u.def.section->output_section->vma
3734 + h->root.u.def.section->output_offset);
3738 outrel.r_info = htab->r_info (h->dynindx, r_type);
3739 outrel.r_addend = 0;
3742 /* Dynamic relocations are stored in
3743 1. .rela.ifunc section in PIC object.
3744 2. .rela.got section in dynamic executable.
3745 3. .rela.iplt section in static executable. */
3746 if (bfd_link_pic (info))
3747 sreloc = htab->elf.irelifunc;
3748 else if (htab->elf.splt != NULL)
3749 sreloc = htab->elf.srelgot;
3751 sreloc = htab->elf.irelplt;
3752 elf_append_rela (output_bfd, sreloc, &outrel);
3754 /* If this reloc is against an external symbol, we
3755 do not want to fiddle with the addend. Otherwise,
3756 we need to include the symbol value so that it
3757 becomes an addend for the dynamic reloc. For an
3758 internal symbol, we have updated addend. */
3763 case R_X86_64_PC32_BND:
3765 case R_X86_64_PLT32:
3766 case R_X86_64_PLT32_BND:
3771 resolved_to_zero = (eh != NULL
3772 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
3777 /* When generating a shared object, the relocations handled here are
3778 copied into the output file to be resolved at run time. */
3781 case R_X86_64_GOT32:
3782 case R_X86_64_GOT64:
3783 /* Relocation is to the entry for this symbol in the global
3785 case R_X86_64_GOTPCREL:
3786 case R_X86_64_GOTPCRELX:
3787 case R_X86_64_REX_GOTPCRELX:
3788 case R_X86_64_GOTPCREL64:
3789 /* Use global offset table entry as symbol value. */
3790 case R_X86_64_GOTPLT64:
3791 /* This is obsolete and treated the same as GOT64. */
3792 base_got = htab->elf.sgot;
3794 if (htab->elf.sgot == NULL)
3797 relative_reloc = FALSE;
3802 off = h->got.offset;
3804 && h->plt.offset != (bfd_vma)-1
3805 && off == (bfd_vma)-1)
3807 /* We can't use h->got.offset here to save
3808 state, or even just remember the offset, as
3809 finish_dynamic_symbol would use that as offset into
3811 bfd_vma plt_index = (h->plt.offset / plt_entry_size
3812 - htab->plt.has_plt0);
3813 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3814 base_got = htab->elf.sgotplt;
3817 dyn = htab->elf.dynamic_sections_created;
3819 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
3820 || (bfd_link_pic (info)
3821 && SYMBOL_REFERENCES_LOCAL (info, h))
3822 || (ELF_ST_VISIBILITY (h->other)
3823 && h->root.type == bfd_link_hash_undefweak))
3825 /* This is actually a static link, or it is a -Bsymbolic
3826 link and the symbol is defined locally, or the symbol
3827 was forced to be local because of a version file. We
3828 must initialize this entry in the global offset table.
3829 Since the offset must always be a multiple of 8, we
3830 use the least significant bit to record whether we
3831 have initialized it already.
3833 When doing a dynamic link, we create a .rela.got
3834 relocation entry to initialize the value. This is
3835 done in the finish_dynamic_symbol routine. */
3840 bfd_put_64 (output_bfd, relocation,
3841 base_got->contents + off);
3842 /* Note that this is harmless for the GOTPLT64 case,
3843 as -1 | 1 still is -1. */
3846 if (h->dynindx == -1
3848 && h->root.type != bfd_link_hash_undefweak
3849 && bfd_link_pic (info))
3851 /* If this symbol isn't dynamic in PIC,
3852 generate R_X86_64_RELATIVE here. */
3853 eh->no_finish_dynamic_symbol = 1;
3854 relative_reloc = TRUE;
3859 unresolved_reloc = FALSE;
3863 if (local_got_offsets == NULL)
3866 off = local_got_offsets[r_symndx];
3868 /* The offset must always be a multiple of 8. We use
3869 the least significant bit to record whether we have
3870 already generated the necessary reloc. */
3875 bfd_put_64 (output_bfd, relocation,
3876 base_got->contents + off);
3877 local_got_offsets[r_symndx] |= 1;
3879 if (bfd_link_pic (info))
3880 relative_reloc = TRUE;
3887 Elf_Internal_Rela outrel;
3889 /* We need to generate a R_X86_64_RELATIVE reloc
3890 for the dynamic linker. */
3891 s = htab->elf.srelgot;
3895 outrel.r_offset = (base_got->output_section->vma
3896 + base_got->output_offset
3898 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3899 outrel.r_addend = relocation;
3900 elf_append_rela (output_bfd, s, &outrel);
3903 if (off >= (bfd_vma) -2)
3906 relocation = base_got->output_section->vma
3907 + base_got->output_offset + off;
3908 if (r_type != R_X86_64_GOTPCREL
3909 && r_type != R_X86_64_GOTPCRELX
3910 && r_type != R_X86_64_REX_GOTPCRELX
3911 && r_type != R_X86_64_GOTPCREL64)
3912 relocation -= htab->elf.sgotplt->output_section->vma
3913 - htab->elf.sgotplt->output_offset;
3917 case R_X86_64_GOTOFF64:
3918 /* Relocation is relative to the start of the global offset
3921 /* Check to make sure it isn't a protected function or data
3922 symbol for shared library since it may not be local when
3923 used as function address or with copy relocation. We also
3924 need to make sure that a symbol is referenced locally. */
3925 if (bfd_link_pic (info) && h)
3927 if (!h->def_regular)
3931 switch (ELF_ST_VISIBILITY (h->other))
3934 v = _("hidden symbol");
3937 v = _("internal symbol");
3940 v = _("protected symbol");
3948 /* xgettext:c-format */
3949 (_("%B: relocation R_X86_64_GOTOFF64 against undefined %s"
3950 " `%s' can not be used when making a shared object"),
3951 input_bfd, v, h->root.root.string);
3952 bfd_set_error (bfd_error_bad_value);
3955 else if (!bfd_link_executable (info)
3956 && !SYMBOL_REFERENCES_LOCAL (info, h)
3957 && (h->type == STT_FUNC
3958 || h->type == STT_OBJECT)
3959 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3962 /* xgettext:c-format */
3963 (_("%B: relocation R_X86_64_GOTOFF64 against protected %s"
3964 " `%s' can not be used when making a shared object"),
3966 h->type == STT_FUNC ? "function" : "data",
3967 h->root.root.string);
3968 bfd_set_error (bfd_error_bad_value);
3973 /* Note that sgot is not involved in this
3974 calculation. We always want the start of .got.plt. If we
3975 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3976 permitted by the ABI, we might have to change this
3978 relocation -= htab->elf.sgotplt->output_section->vma
3979 + htab->elf.sgotplt->output_offset;
3982 case R_X86_64_GOTPC32:
3983 case R_X86_64_GOTPC64:
3984 /* Use global offset table as symbol value. */
3985 relocation = htab->elf.sgotplt->output_section->vma
3986 + htab->elf.sgotplt->output_offset;
3987 unresolved_reloc = FALSE;
3990 case R_X86_64_PLTOFF64:
3991 /* Relocation is PLT entry relative to GOT. For local
3992 symbols it's the symbol itself relative to GOT. */
3994 /* See PLT32 handling. */
3995 && (h->plt.offset != (bfd_vma) -1
3996 || eh->plt_got.offset != (bfd_vma) -1)
3997 && htab->elf.splt != NULL)
3999 if (eh->plt_got.offset != (bfd_vma) -1)
4001 /* Use the GOT PLT. */
4002 resolved_plt = htab->plt_got;
4003 plt_offset = eh->plt_got.offset;
4005 else if (htab->plt_second != NULL)
4007 resolved_plt = htab->plt_second;
4008 plt_offset = eh->plt_second.offset;
4012 resolved_plt = htab->elf.splt;
4013 plt_offset = h->plt.offset;
4016 relocation = (resolved_plt->output_section->vma
4017 + resolved_plt->output_offset
4019 unresolved_reloc = FALSE;
4022 relocation -= htab->elf.sgotplt->output_section->vma
4023 + htab->elf.sgotplt->output_offset;
4026 case R_X86_64_PLT32:
4027 case R_X86_64_PLT32_BND:
4028 /* Relocation is to the entry for this symbol in the
4029 procedure linkage table. */
4031 /* Resolve a PLT32 reloc against a local symbol directly,
4032 without using the procedure linkage table. */
4036 if ((h->plt.offset == (bfd_vma) -1
4037 && eh->plt_got.offset == (bfd_vma) -1)
4038 || htab->elf.splt == NULL)
4040 /* We didn't make a PLT entry for this symbol. This
4041 happens when statically linking PIC code, or when
4042 using -Bsymbolic. */
4046 if (h->plt.offset != (bfd_vma) -1)
4048 if (htab->plt_second != NULL)
4050 resolved_plt = htab->plt_second;
4051 plt_offset = eh->plt_second.offset;
4055 resolved_plt = htab->elf.splt;
4056 plt_offset = h->plt.offset;
4061 /* Use the GOT PLT. */
4062 resolved_plt = htab->plt_got;
4063 plt_offset = eh->plt_got.offset;
4066 relocation = (resolved_plt->output_section->vma
4067 + resolved_plt->output_offset
4069 unresolved_reloc = FALSE;
4072 case R_X86_64_SIZE32:
4073 case R_X86_64_SIZE64:
4074 /* Set to symbol size. */
4075 relocation = st_size;
4081 case R_X86_64_PC32_BND:
4082 /* Don't complain about -fPIC if the symbol is undefined when
4083 building executable unless it is unresolved weak symbol or
4084 -z nocopyreloc is used. */
4085 if ((input_section->flags & SEC_ALLOC) != 0
4086 && (input_section->flags & SEC_READONLY) != 0
4088 && ((bfd_link_executable (info)
4089 && ((h->root.type == bfd_link_hash_undefweak
4090 && !resolved_to_zero)
4091 || ((info->nocopyreloc
4092 || (eh->def_protected
4093 && elf_has_no_copy_on_protected (h->root.u.def.section->owner)))
4095 && !(h->root.u.def.section->flags & SEC_CODE))))
4096 || bfd_link_dll (info)))
4098 bfd_boolean fail = FALSE;
4100 = ((r_type == R_X86_64_PC32
4101 || r_type == R_X86_64_PC32_BND)
4102 && is_32bit_relative_branch (contents, rel->r_offset));
4104 if (SYMBOL_REFERENCES_LOCAL (info, h))
4106 /* Symbol is referenced locally. Make sure it is
4107 defined locally or for a branch. */
4108 fail = (!(h->def_regular || ELF_COMMON_DEF_P (h))
4111 else if (!(bfd_link_pie (info)
4112 && (h->needs_copy || eh->needs_copy)))
4114 /* Symbol doesn't need copy reloc and isn't referenced
4115 locally. We only allow branch to symbol with
4116 non-default visibility. */
4118 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
4122 return elf_x86_64_need_pic (info, input_bfd, input_section,
4123 h, NULL, NULL, howto);
4132 /* FIXME: The ABI says the linker should make sure the value is
4133 the same when it's zeroextended to 64 bit. */
4136 if ((input_section->flags & SEC_ALLOC) == 0)
4139 /* Don't copy a pc-relative relocation into the output file
4140 if the symbol needs copy reloc or the symbol is undefined
4141 when building executable. Copy dynamic function pointer
4142 relocations. Don't generate dynamic relocations against
4143 resolved undefined weak symbols in PIE. */
4144 if ((bfd_link_pic (info)
4145 && !(bfd_link_pie (info)
4149 || h->root.type == bfd_link_hash_undefined)
4150 && (IS_X86_64_PCREL_TYPE (r_type)
4151 || r_type == R_X86_64_SIZE32
4152 || r_type == R_X86_64_SIZE64))
4154 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4155 && !resolved_to_zero)
4156 || h->root.type != bfd_link_hash_undefweak))
4157 && ((! IS_X86_64_PCREL_TYPE (r_type)
4158 && r_type != R_X86_64_SIZE32
4159 && r_type != R_X86_64_SIZE64)
4160 || ! SYMBOL_CALLS_LOCAL (info, h)))
4161 || (ELIMINATE_COPY_RELOCS
4162 && !bfd_link_pic (info)
4166 || eh->func_pointer_refcount > 0
4167 || (h->root.type == bfd_link_hash_undefweak
4168 && !resolved_to_zero))
4169 && ((h->def_dynamic && !h->def_regular)
4170 /* Undefined weak symbol is bound locally when
4172 || h->root.type == bfd_link_hash_undefined)))
4174 Elf_Internal_Rela outrel;
4175 bfd_boolean skip, relocate;
4178 /* When generating a shared object, these relocations
4179 are copied into the output file to be resolved at run
4185 _bfd_elf_section_offset (output_bfd, info, input_section,
4187 if (outrel.r_offset == (bfd_vma) -1)
4189 else if (outrel.r_offset == (bfd_vma) -2)
4190 skip = TRUE, relocate = TRUE;
4192 outrel.r_offset += (input_section->output_section->vma
4193 + input_section->output_offset);
4196 memset (&outrel, 0, sizeof outrel);
4198 /* h->dynindx may be -1 if this symbol was marked to
4202 && (IS_X86_64_PCREL_TYPE (r_type)
4203 || !(bfd_link_executable (info)
4204 || SYMBOLIC_BIND (info, h))
4205 || ! h->def_regular))
4207 outrel.r_info = htab->r_info (h->dynindx, r_type);
4208 outrel.r_addend = rel->r_addend;
4212 /* This symbol is local, or marked to become local.
4213 When relocation overflow check is disabled, we
4214 convert R_X86_64_32 to dynamic R_X86_64_RELATIVE. */
4215 if (r_type == htab->pointer_r_type
4216 || (r_type == R_X86_64_32
4217 && info->no_reloc_overflow_check))
4220 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4221 outrel.r_addend = relocation + rel->r_addend;
4223 else if (r_type == R_X86_64_64
4224 && !ABI_64_P (output_bfd))
4227 outrel.r_info = htab->r_info (0,
4228 R_X86_64_RELATIVE64);
4229 outrel.r_addend = relocation + rel->r_addend;
4230 /* Check addend overflow. */
4231 if ((outrel.r_addend & 0x80000000)
4232 != (rel->r_addend & 0x80000000))
4235 int addend = rel->r_addend;
4236 if (h && h->root.root.string)
4237 name = h->root.root.string;
4239 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4242 /* xgettext:c-format */
4243 (_("%B: addend %s%#x in relocation %s against "
4244 "symbol `%s' at %#Lx in section `%A' is "
4246 input_bfd, addend < 0 ? "-" : "", addend,
4247 howto->name, name, rel->r_offset, input_section);
4248 bfd_set_error (bfd_error_bad_value);
4256 if (bfd_is_abs_section (sec))
4258 else if (sec == NULL || sec->owner == NULL)
4260 bfd_set_error (bfd_error_bad_value);
4267 /* We are turning this relocation into one
4268 against a section symbol. It would be
4269 proper to subtract the symbol's value,
4270 osec->vma, from the emitted reloc addend,
4271 but ld.so expects buggy relocs. */
4272 osec = sec->output_section;
4273 sindx = elf_section_data (osec)->dynindx;
4276 asection *oi = htab->elf.text_index_section;
4277 sindx = elf_section_data (oi)->dynindx;
4279 BFD_ASSERT (sindx != 0);
4282 outrel.r_info = htab->r_info (sindx, r_type);
4283 outrel.r_addend = relocation + rel->r_addend;
4287 sreloc = elf_section_data (input_section)->sreloc;
4289 if (sreloc == NULL || sreloc->contents == NULL)
4291 r = bfd_reloc_notsupported;
4292 goto check_relocation_error;
4295 elf_append_rela (output_bfd, sreloc, &outrel);
4297 /* If this reloc is against an external symbol, we do
4298 not want to fiddle with the addend. Otherwise, we
4299 need to include the symbol value so that it becomes
4300 an addend for the dynamic reloc. */
4307 case R_X86_64_TLSGD:
4308 case R_X86_64_GOTPC32_TLSDESC:
4309 case R_X86_64_TLSDESC_CALL:
4310 case R_X86_64_GOTTPOFF:
4311 tls_type = GOT_UNKNOWN;
4312 if (h == NULL && local_got_offsets)
4313 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
4315 tls_type = elf_x86_hash_entry (h)->tls_type;
4317 if (! elf_x86_64_tls_transition (info, input_bfd,
4318 input_section, contents,
4319 symtab_hdr, sym_hashes,
4320 &r_type, tls_type, rel,
4321 relend, h, r_symndx, TRUE))
4324 if (r_type == R_X86_64_TPOFF32)
4326 bfd_vma roff = rel->r_offset;
4328 BFD_ASSERT (! unresolved_reloc);
4330 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
4332 /* GD->LE transition. For 64bit, change
4333 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4334 .word 0x6666; rex64; call __tls_get_addr@PLT
4336 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4338 call *__tls_get_addr@GOTPCREL(%rip)
4339 which may be converted to
4340 addr32 call __tls_get_addr
4343 leaq foo@tpoff(%rax), %rax
4345 leaq foo@tlsgd(%rip), %rdi
4346 .word 0x6666; rex64; call __tls_get_addr@PLT
4348 leaq foo@tlsgd(%rip), %rdi
4350 call *__tls_get_addr@GOTPCREL(%rip)
4351 which may be converted to
4352 addr32 call __tls_get_addr
4355 leaq foo@tpoff(%rax), %rax
4356 For largepic, change:
4357 leaq foo@tlsgd(%rip), %rdi
4358 movabsq $__tls_get_addr@pltoff, %rax
4363 leaq foo@tpoff(%rax), %rax
4364 nopw 0x0(%rax,%rax,1) */
4366 if (ABI_64_P (output_bfd))
4368 if (contents[roff + 5] == 0xb8)
4370 memcpy (contents + roff - 3,
4371 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80"
4372 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4376 memcpy (contents + roff - 4,
4377 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4381 memcpy (contents + roff - 3,
4382 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
4384 bfd_put_32 (output_bfd,
4385 elf_x86_64_tpoff (info, relocation),
4386 contents + roff + 8 + largepic);
4387 /* Skip R_X86_64_PC32, R_X86_64_PLT32,
4388 R_X86_64_GOTPCRELX and R_X86_64_PLTOFF64. */
4393 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
4395 /* GDesc -> LE transition.
4396 It's originally something like:
4397 leaq x@tlsdesc(%rip), %rax
4400 movl $x@tpoff, %rax. */
4402 unsigned int val, type;
4404 type = bfd_get_8 (input_bfd, contents + roff - 3);
4405 val = bfd_get_8 (input_bfd, contents + roff - 1);
4406 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
4407 contents + roff - 3);
4408 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
4409 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4410 contents + roff - 1);
4411 bfd_put_32 (output_bfd,
4412 elf_x86_64_tpoff (info, relocation),
4416 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
4418 /* GDesc -> LE transition.
4423 bfd_put_8 (output_bfd, 0x66, contents + roff);
4424 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4427 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
4429 /* IE->LE transition:
4430 For 64bit, originally it can be one of:
4431 movq foo@gottpoff(%rip), %reg
4432 addq foo@gottpoff(%rip), %reg
4435 leaq foo(%reg), %reg
4437 For 32bit, originally it can be one of:
4438 movq foo@gottpoff(%rip), %reg
4439 addl foo@gottpoff(%rip), %reg
4442 leal foo(%reg), %reg
4445 unsigned int val, type, reg;
4448 val = bfd_get_8 (input_bfd, contents + roff - 3);
4451 type = bfd_get_8 (input_bfd, contents + roff - 2);
4452 reg = bfd_get_8 (input_bfd, contents + roff - 1);
4458 bfd_put_8 (output_bfd, 0x49,
4459 contents + roff - 3);
4460 else if (!ABI_64_P (output_bfd) && val == 0x44)
4461 bfd_put_8 (output_bfd, 0x41,
4462 contents + roff - 3);
4463 bfd_put_8 (output_bfd, 0xc7,
4464 contents + roff - 2);
4465 bfd_put_8 (output_bfd, 0xc0 | reg,
4466 contents + roff - 1);
4470 /* addq/addl -> addq/addl - addressing with %rsp/%r12
4473 bfd_put_8 (output_bfd, 0x49,
4474 contents + roff - 3);
4475 else if (!ABI_64_P (output_bfd) && val == 0x44)
4476 bfd_put_8 (output_bfd, 0x41,
4477 contents + roff - 3);
4478 bfd_put_8 (output_bfd, 0x81,
4479 contents + roff - 2);
4480 bfd_put_8 (output_bfd, 0xc0 | reg,
4481 contents + roff - 1);
4485 /* addq/addl -> leaq/leal */
4487 bfd_put_8 (output_bfd, 0x4d,
4488 contents + roff - 3);
4489 else if (!ABI_64_P (output_bfd) && val == 0x44)
4490 bfd_put_8 (output_bfd, 0x45,
4491 contents + roff - 3);
4492 bfd_put_8 (output_bfd, 0x8d,
4493 contents + roff - 2);
4494 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
4495 contents + roff - 1);
4497 bfd_put_32 (output_bfd,
4498 elf_x86_64_tpoff (info, relocation),
4506 if (htab->elf.sgot == NULL)
4511 off = h->got.offset;
4512 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
4516 if (local_got_offsets == NULL)
4519 off = local_got_offsets[r_symndx];
4520 offplt = local_tlsdesc_gotents[r_symndx];
4527 Elf_Internal_Rela outrel;
4531 if (htab->elf.srelgot == NULL)
4534 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4536 if (GOT_TLS_GDESC_P (tls_type))
4538 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
4539 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
4540 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
4541 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4542 + htab->elf.sgotplt->output_offset
4544 + htab->sgotplt_jump_table_size);
4545 sreloc = htab->elf.srelplt;
4547 outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info);
4549 outrel.r_addend = 0;
4550 elf_append_rela (output_bfd, sreloc, &outrel);
4553 sreloc = htab->elf.srelgot;
4555 outrel.r_offset = (htab->elf.sgot->output_section->vma
4556 + htab->elf.sgot->output_offset + off);
4558 if (GOT_TLS_GD_P (tls_type))
4559 dr_type = R_X86_64_DTPMOD64;
4560 else if (GOT_TLS_GDESC_P (tls_type))
4563 dr_type = R_X86_64_TPOFF64;
4565 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
4566 outrel.r_addend = 0;
4567 if ((dr_type == R_X86_64_TPOFF64
4568 || dr_type == R_X86_64_TLSDESC) && indx == 0)
4569 outrel.r_addend = relocation - _bfd_x86_elf_dtpoff_base (info);
4570 outrel.r_info = htab->r_info (indx, dr_type);
4572 elf_append_rela (output_bfd, sreloc, &outrel);
4574 if (GOT_TLS_GD_P (tls_type))
4578 BFD_ASSERT (! unresolved_reloc);
4579 bfd_put_64 (output_bfd,
4580 relocation - _bfd_x86_elf_dtpoff_base (info),
4581 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4585 bfd_put_64 (output_bfd, 0,
4586 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4587 outrel.r_info = htab->r_info (indx,
4589 outrel.r_offset += GOT_ENTRY_SIZE;
4590 elf_append_rela (output_bfd, sreloc,
4599 local_got_offsets[r_symndx] |= 1;
4602 if (off >= (bfd_vma) -2
4603 && ! GOT_TLS_GDESC_P (tls_type))
4605 if (r_type == ELF32_R_TYPE (rel->r_info))
4607 if (r_type == R_X86_64_GOTPC32_TLSDESC
4608 || r_type == R_X86_64_TLSDESC_CALL)
4609 relocation = htab->elf.sgotplt->output_section->vma
4610 + htab->elf.sgotplt->output_offset
4611 + offplt + htab->sgotplt_jump_table_size;
4613 relocation = htab->elf.sgot->output_section->vma
4614 + htab->elf.sgot->output_offset + off;
4615 unresolved_reloc = FALSE;
4619 bfd_vma roff = rel->r_offset;
4621 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
4623 /* GD->IE transition. For 64bit, change
4624 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4625 .word 0x6666; rex64; call __tls_get_addr@PLT
4627 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4629 call *__tls_get_addr@GOTPCREL(%rip
4630 which may be converted to
4631 addr32 call __tls_get_addr
4634 addq foo@gottpoff(%rip), %rax
4636 leaq foo@tlsgd(%rip), %rdi
4637 .word 0x6666; rex64; call __tls_get_addr@PLT
4639 leaq foo@tlsgd(%rip), %rdi
4641 call *__tls_get_addr@GOTPCREL(%rip)
4642 which may be converted to
4643 addr32 call __tls_get_addr
4646 addq foo@gottpoff(%rip), %rax
4647 For largepic, change:
4648 leaq foo@tlsgd(%rip), %rdi
4649 movabsq $__tls_get_addr@pltoff, %rax
4654 addq foo@gottpoff(%rax), %rax
4655 nopw 0x0(%rax,%rax,1) */
4657 if (ABI_64_P (output_bfd))
4659 if (contents[roff + 5] == 0xb8)
4661 memcpy (contents + roff - 3,
4662 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05"
4663 "\0\0\0\0\x66\x0f\x1f\x44\0", 22);
4667 memcpy (contents + roff - 4,
4668 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4672 memcpy (contents + roff - 3,
4673 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4676 relocation = (htab->elf.sgot->output_section->vma
4677 + htab->elf.sgot->output_offset + off
4680 - input_section->output_section->vma
4681 - input_section->output_offset
4683 bfd_put_32 (output_bfd, relocation,
4684 contents + roff + 8 + largepic);
4685 /* Skip R_X86_64_PLT32/R_X86_64_PLTOFF64. */
4690 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
4692 /* GDesc -> IE transition.
4693 It's originally something like:
4694 leaq x@tlsdesc(%rip), %rax
4697 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4699 /* Now modify the instruction as appropriate. To
4700 turn a leaq into a movq in the form we use it, it
4701 suffices to change the second byte from 0x8d to
4703 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4705 bfd_put_32 (output_bfd,
4706 htab->elf.sgot->output_section->vma
4707 + htab->elf.sgot->output_offset + off
4709 - input_section->output_section->vma
4710 - input_section->output_offset
4715 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
4717 /* GDesc -> IE transition.
4724 bfd_put_8 (output_bfd, 0x66, contents + roff);
4725 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4733 case R_X86_64_TLSLD:
4734 if (! elf_x86_64_tls_transition (info, input_bfd,
4735 input_section, contents,
4736 symtab_hdr, sym_hashes,
4737 &r_type, GOT_UNKNOWN, rel,
4738 relend, h, r_symndx, TRUE))
4741 if (r_type != R_X86_64_TLSLD)
4743 /* LD->LE transition:
4744 leaq foo@tlsld(%rip), %rdi
4745 call __tls_get_addr@PLT
4746 For 64bit, we change it into:
4747 .word 0x6666; .byte 0x66; movq %fs:0, %rax
4748 For 32bit, we change it into:
4749 nopl 0x0(%rax); movl %fs:0, %eax
4751 leaq foo@tlsld(%rip), %rdi;
4752 call *__tls_get_addr@GOTPCREL(%rip)
4753 which may be converted to
4754 addr32 call __tls_get_addr
4755 For 64bit, we change it into:
4756 .word 0x6666; .word 0x6666; movq %fs:0, %rax
4757 For 32bit, we change it into:
4758 nopw 0x0(%rax); movl %fs:0, %eax
4759 For largepic, change:
4760 leaq foo@tlsgd(%rip), %rdi
4761 movabsq $__tls_get_addr@pltoff, %rax
4765 data16 data16 data16 nopw %cs:0x0(%rax,%rax,1)
4768 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
4769 if (ABI_64_P (output_bfd))
4771 if (contents[rel->r_offset + 5] == 0xb8)
4772 memcpy (contents + rel->r_offset - 3,
4773 "\x66\x66\x66\x66\x2e\x0f\x1f\x84\0\0\0\0\0"
4774 "\x64\x48\x8b\x04\x25\0\0\0", 22);
4775 else if (contents[rel->r_offset + 4] == 0xff
4776 || contents[rel->r_offset + 4] == 0x67)
4777 memcpy (contents + rel->r_offset - 3,
4778 "\x66\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0",
4781 memcpy (contents + rel->r_offset - 3,
4782 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4786 if (contents[rel->r_offset + 4] == 0xff)
4787 memcpy (contents + rel->r_offset - 3,
4788 "\x66\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0",
4791 memcpy (contents + rel->r_offset - 3,
4792 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4794 /* Skip R_X86_64_PC32, R_X86_64_PLT32, R_X86_64_GOTPCRELX
4795 and R_X86_64_PLTOFF64. */
4801 if (htab->elf.sgot == NULL)
4804 off = htab->tls_ld_or_ldm_got.offset;
4809 Elf_Internal_Rela outrel;
4811 if (htab->elf.srelgot == NULL)
4814 outrel.r_offset = (htab->elf.sgot->output_section->vma
4815 + htab->elf.sgot->output_offset + off);
4817 bfd_put_64 (output_bfd, 0,
4818 htab->elf.sgot->contents + off);
4819 bfd_put_64 (output_bfd, 0,
4820 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4821 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
4822 outrel.r_addend = 0;
4823 elf_append_rela (output_bfd, htab->elf.srelgot,
4825 htab->tls_ld_or_ldm_got.offset |= 1;
4827 relocation = htab->elf.sgot->output_section->vma
4828 + htab->elf.sgot->output_offset + off;
4829 unresolved_reloc = FALSE;
4832 case R_X86_64_DTPOFF32:
4833 if (!bfd_link_executable (info)
4834 || (input_section->flags & SEC_CODE) == 0)
4835 relocation -= _bfd_x86_elf_dtpoff_base (info);
4837 relocation = elf_x86_64_tpoff (info, relocation);
4840 case R_X86_64_TPOFF32:
4841 case R_X86_64_TPOFF64:
4842 BFD_ASSERT (bfd_link_executable (info));
4843 relocation = elf_x86_64_tpoff (info, relocation);
4846 case R_X86_64_DTPOFF64:
4847 BFD_ASSERT ((input_section->flags & SEC_CODE) == 0);
4848 relocation -= _bfd_x86_elf_dtpoff_base (info);
4855 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4856 because such sections are not SEC_ALLOC and thus ld.so will
4857 not process them. */
4858 if (unresolved_reloc
4859 && !((input_section->flags & SEC_DEBUGGING) != 0
4861 && _bfd_elf_section_offset (output_bfd, info, input_section,
4862 rel->r_offset) != (bfd_vma) -1)
4867 sec = h->root.u.def.section;
4868 if ((info->nocopyreloc
4869 || (eh->def_protected
4870 && elf_has_no_copy_on_protected (h->root.u.def.section->owner)))
4871 && !(h->root.u.def.section->flags & SEC_CODE))
4872 return elf_x86_64_need_pic (info, input_bfd, input_section,
4873 h, NULL, NULL, howto);
4878 /* xgettext:c-format */
4879 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
4884 h->root.root.string);
4890 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4891 contents, rel->r_offset,
4892 relocation, rel->r_addend);
4894 check_relocation_error:
4895 if (r != bfd_reloc_ok)
4900 name = h->root.root.string;
4903 name = bfd_elf_string_from_elf_section (input_bfd,
4904 symtab_hdr->sh_link,
4909 name = bfd_section_name (input_bfd, sec);
4912 if (r == bfd_reloc_overflow)
4913 (*info->callbacks->reloc_overflow)
4914 (info, (h ? &h->root : NULL), name, howto->name,
4915 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
4919 /* xgettext:c-format */
4920 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
4921 input_bfd, input_section,
4922 rel->r_offset, name, (int) r);
4933 Elf_Internal_Shdr *rel_hdr;
4934 size_t deleted = rel - wrel;
4936 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4937 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4938 if (rel_hdr->sh_size == 0)
4940 /* It is too late to remove an empty reloc section. Leave
4942 ??? What is wrong with an empty section??? */
4943 rel_hdr->sh_size = rel_hdr->sh_entsize;
4946 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4947 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4948 input_section->reloc_count -= deleted;
4954 /* Finish up dynamic symbol handling. We set the contents of various
4955 dynamic sections here. */
4958 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
4959 struct bfd_link_info *info,
4960 struct elf_link_hash_entry *h,
4961 Elf_Internal_Sym *sym)
4963 struct elf_x86_link_hash_table *htab;
4964 bfd_boolean use_plt_second;
4965 struct elf_x86_link_hash_entry *eh;
4966 bfd_boolean local_undefweak;
4968 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
4972 /* Use the second PLT section only if there is .plt section. */
4973 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
4975 eh = (struct elf_x86_link_hash_entry *) h;
4976 if (eh->no_finish_dynamic_symbol)
4979 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4980 resolved undefined weak symbols in executable so that their
4981 references have value 0 at run-time. */
4982 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4987 if (h->plt.offset != (bfd_vma) -1)
4990 bfd_vma got_offset, plt_offset;
4991 Elf_Internal_Rela rela;
4993 asection *plt, *gotplt, *relplt, *resolved_plt;
4994 const struct elf_backend_data *bed;
4995 bfd_vma plt_got_pcrel_offset;
4997 /* When building a static executable, use .iplt, .igot.plt and
4998 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4999 if (htab->elf.splt != NULL)
5001 plt = htab->elf.splt;
5002 gotplt = htab->elf.sgotplt;
5003 relplt = htab->elf.srelplt;
5007 plt = htab->elf.iplt;
5008 gotplt = htab->elf.igotplt;
5009 relplt = htab->elf.irelplt;
5012 /* This symbol has an entry in the procedure linkage table. Set
5014 if ((h->dynindx == -1
5016 && !((h->forced_local || bfd_link_executable (info))
5018 && h->type == STT_GNU_IFUNC))
5024 /* Get the index in the procedure linkage table which
5025 corresponds to this symbol. This is the index of this symbol
5026 in all the symbols for which we are making plt entries. The
5027 first entry in the procedure linkage table is reserved.
5029 Get the offset into the .got table of the entry that
5030 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
5031 bytes. The first three are reserved for the dynamic linker.
5033 For static executables, we don't reserve anything. */
5035 if (plt == htab->elf.splt)
5037 got_offset = (h->plt.offset / htab->plt.plt_entry_size
5038 - htab->plt.has_plt0);
5039 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
5043 got_offset = h->plt.offset / htab->plt.plt_entry_size;
5044 got_offset = got_offset * GOT_ENTRY_SIZE;
5047 /* Fill in the entry in the procedure linkage table. */
5048 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
5049 htab->plt.plt_entry_size);
5052 memcpy (htab->plt_second->contents + eh->plt_second.offset,
5053 htab->non_lazy_plt->plt_entry,
5054 htab->non_lazy_plt->plt_entry_size);
5056 resolved_plt = htab->plt_second;
5057 plt_offset = eh->plt_second.offset;
5062 plt_offset = h->plt.offset;
5065 /* Insert the relocation positions of the plt section. */
5067 /* Put offset the PC-relative instruction referring to the GOT entry,
5068 subtracting the size of that instruction. */
5069 plt_got_pcrel_offset = (gotplt->output_section->vma
5070 + gotplt->output_offset
5072 - resolved_plt->output_section->vma
5073 - resolved_plt->output_offset
5075 - htab->plt.plt_got_insn_size);
5077 /* Check PC-relative offset overflow in PLT entry. */
5078 if ((plt_got_pcrel_offset + 0x80000000) > 0xffffffff)
5079 /* xgettext:c-format */
5080 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in PLT entry for `%s'\n"),
5081 output_bfd, h->root.root.string);
5083 bfd_put_32 (output_bfd, plt_got_pcrel_offset,
5084 (resolved_plt->contents + plt_offset
5085 + htab->plt.plt_got_offset));
5087 /* Fill in the entry in the global offset table, initially this
5088 points to the second part of the PLT entry. Leave the entry
5089 as zero for undefined weak symbol in PIE. No PLT relocation
5090 against undefined weak symbol in PIE. */
5091 if (!local_undefweak)
5093 if (htab->plt.has_plt0)
5094 bfd_put_64 (output_bfd, (plt->output_section->vma
5095 + plt->output_offset
5097 + htab->lazy_plt->plt_lazy_offset),
5098 gotplt->contents + got_offset);
5100 /* Fill in the entry in the .rela.plt section. */
5101 rela.r_offset = (gotplt->output_section->vma
5102 + gotplt->output_offset
5104 if (h->dynindx == -1
5105 || ((bfd_link_executable (info)
5106 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5108 && h->type == STT_GNU_IFUNC))
5110 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5111 h->root.root.string,
5112 h->root.u.def.section->owner);
5114 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5115 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
5116 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
5117 rela.r_addend = (h->root.u.def.value
5118 + h->root.u.def.section->output_section->vma
5119 + h->root.u.def.section->output_offset);
5120 /* R_X86_64_IRELATIVE comes last. */
5121 plt_index = htab->next_irelative_index--;
5125 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
5127 plt_index = htab->next_jump_slot_index++;
5130 /* Don't fill the second and third slots in PLT entry for
5131 static executables nor without PLT0. */
5132 if (plt == htab->elf.splt && htab->plt.has_plt0)
5135 = h->plt.offset + htab->lazy_plt->plt_plt_insn_end;
5137 /* Put relocation index. */
5138 bfd_put_32 (output_bfd, plt_index,
5139 (plt->contents + h->plt.offset
5140 + htab->lazy_plt->plt_reloc_offset));
5142 /* Put offset for jmp .PLT0 and check for overflow. We don't
5143 check relocation index for overflow since branch displacement
5144 will overflow first. */
5145 if (plt0_offset > 0x80000000)
5146 /* xgettext:c-format */
5147 info->callbacks->einfo (_("%F%B: branch displacement overflow in PLT entry for `%s'\n"),
5148 output_bfd, h->root.root.string);
5149 bfd_put_32 (output_bfd, - plt0_offset,
5150 (plt->contents + h->plt.offset
5151 + htab->lazy_plt->plt_plt_offset));
5154 bed = get_elf_backend_data (output_bfd);
5155 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
5156 bed->s->swap_reloca_out (output_bfd, &rela, loc);
5159 else if (eh->plt_got.offset != (bfd_vma) -1)
5161 bfd_vma got_offset, plt_offset;
5162 asection *plt, *got;
5163 bfd_boolean got_after_plt;
5164 int32_t got_pcrel_offset;
5166 /* Set the entry in the GOT procedure linkage table. */
5167 plt = htab->plt_got;
5168 got = htab->elf.sgot;
5169 got_offset = h->got.offset;
5171 if (got_offset == (bfd_vma) -1
5172 || (h->type == STT_GNU_IFUNC && h->def_regular)
5177 /* Use the non-lazy PLT entry template for the GOT PLT since they
5178 are the identical. */
5179 /* Fill in the entry in the GOT procedure linkage table. */
5180 plt_offset = eh->plt_got.offset;
5181 memcpy (plt->contents + plt_offset,
5182 htab->non_lazy_plt->plt_entry,
5183 htab->non_lazy_plt->plt_entry_size);
5185 /* Put offset the PC-relative instruction referring to the GOT
5186 entry, subtracting the size of that instruction. */
5187 got_pcrel_offset = (got->output_section->vma
5188 + got->output_offset
5190 - plt->output_section->vma
5191 - plt->output_offset
5193 - htab->non_lazy_plt->plt_got_insn_size);
5195 /* Check PC-relative offset overflow in GOT PLT entry. */
5196 got_after_plt = got->output_section->vma > plt->output_section->vma;
5197 if ((got_after_plt && got_pcrel_offset < 0)
5198 || (!got_after_plt && got_pcrel_offset > 0))
5199 /* xgettext:c-format */
5200 info->callbacks->einfo (_("%F%B: PC-relative offset overflow in GOT PLT entry for `%s'\n"),
5201 output_bfd, h->root.root.string);
5203 bfd_put_32 (output_bfd, got_pcrel_offset,
5204 (plt->contents + plt_offset
5205 + htab->non_lazy_plt->plt_got_offset));
5208 if (!local_undefweak
5210 && (h->plt.offset != (bfd_vma) -1
5211 || eh->plt_got.offset != (bfd_vma) -1))
5213 /* Mark the symbol as undefined, rather than as defined in
5214 the .plt section. Leave the value if there were any
5215 relocations where pointer equality matters (this is a clue
5216 for the dynamic linker, to make function pointer
5217 comparisons work between an application and shared
5218 library), otherwise set it to zero. If a function is only
5219 called from a binary, there is no need to slow down
5220 shared libraries because of that. */
5221 sym->st_shndx = SHN_UNDEF;
5222 if (!h->pointer_equality_needed)
5226 /* Don't generate dynamic GOT relocation against undefined weak
5227 symbol in executable. */
5228 if (h->got.offset != (bfd_vma) -1
5229 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry (h)->tls_type)
5230 && elf_x86_hash_entry (h)->tls_type != GOT_TLS_IE
5231 && !local_undefweak)
5233 Elf_Internal_Rela rela;
5234 asection *relgot = htab->elf.srelgot;
5236 /* This symbol has an entry in the global offset table. Set it
5238 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
5241 rela.r_offset = (htab->elf.sgot->output_section->vma
5242 + htab->elf.sgot->output_offset
5243 + (h->got.offset &~ (bfd_vma) 1));
5245 /* If this is a static link, or it is a -Bsymbolic link and the
5246 symbol is defined locally or was forced to be local because
5247 of a version file, we just want to emit a RELATIVE reloc.
5248 The entry in the global offset table will already have been
5249 initialized in the relocate_section function. */
5251 && h->type == STT_GNU_IFUNC)
5253 if (h->plt.offset == (bfd_vma) -1)
5255 /* STT_GNU_IFUNC is referenced without PLT. */
5256 if (htab->elf.splt == NULL)
5258 /* use .rel[a].iplt section to store .got relocations
5259 in static executable. */
5260 relgot = htab->elf.irelplt;
5262 if (SYMBOL_REFERENCES_LOCAL (info, h))
5264 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5266 h->root.root.string,
5267 h->root.u.def.section->owner);
5269 rela.r_info = htab->r_info (0,
5270 R_X86_64_IRELATIVE);
5271 rela.r_addend = (h->root.u.def.value
5272 + h->root.u.def.section->output_section->vma
5273 + h->root.u.def.section->output_offset);
5278 else if (bfd_link_pic (info))
5280 /* Generate R_X86_64_GLOB_DAT. */
5288 if (!h->pointer_equality_needed)
5291 /* For non-shared object, we can't use .got.plt, which
5292 contains the real function addres if we need pointer
5293 equality. We load the GOT entry with the PLT entry. */
5294 if (htab->plt_second != NULL)
5296 plt = htab->plt_second;
5297 plt_offset = eh->plt_second.offset;
5301 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
5302 plt_offset = h->plt.offset;
5304 bfd_put_64 (output_bfd, (plt->output_section->vma
5305 + plt->output_offset
5307 htab->elf.sgot->contents + h->got.offset);
5311 else if (bfd_link_pic (info)
5312 && SYMBOL_REFERENCES_LOCAL (info, h))
5314 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
5316 BFD_ASSERT((h->got.offset & 1) != 0);
5317 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
5318 rela.r_addend = (h->root.u.def.value
5319 + h->root.u.def.section->output_section->vma
5320 + h->root.u.def.section->output_offset);
5324 BFD_ASSERT((h->got.offset & 1) == 0);
5326 bfd_put_64 (output_bfd, (bfd_vma) 0,
5327 htab->elf.sgot->contents + h->got.offset);
5328 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
5332 elf_append_rela (output_bfd, relgot, &rela);
5337 Elf_Internal_Rela rela;
5340 /* This symbol needs a copy reloc. Set it up. */
5342 if (h->dynindx == -1
5343 || (h->root.type != bfd_link_hash_defined
5344 && h->root.type != bfd_link_hash_defweak)
5345 || htab->elf.srelbss == NULL
5346 || htab->elf.sreldynrelro == NULL)
5349 rela.r_offset = (h->root.u.def.value
5350 + h->root.u.def.section->output_section->vma
5351 + h->root.u.def.section->output_offset);
5352 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
5354 if (h->root.u.def.section == htab->elf.sdynrelro)
5355 s = htab->elf.sreldynrelro;
5357 s = htab->elf.srelbss;
5358 elf_append_rela (output_bfd, s, &rela);
5364 /* Finish up local dynamic symbol handling. We set the contents of
5365 various dynamic sections here. */
5368 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
5370 struct elf_link_hash_entry *h
5371 = (struct elf_link_hash_entry *) *slot;
5372 struct bfd_link_info *info
5373 = (struct bfd_link_info *) inf;
5375 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
5379 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5380 here since undefined weak symbol may not be dynamic and may not be
5381 called for elf_x86_64_finish_dynamic_symbol. */
5384 elf_x86_64_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5387 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5388 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5390 if (h->root.type != bfd_link_hash_undefweak
5391 || h->dynindx != -1)
5394 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
5398 /* Used to decide how to sort relocs in an optimal manner for the
5399 dynamic linker, before writing them out. */
5401 static enum elf_reloc_type_class
5402 elf_x86_64_reloc_type_class (const struct bfd_link_info *info,
5403 const asection *rel_sec ATTRIBUTE_UNUSED,
5404 const Elf_Internal_Rela *rela)
5406 bfd *abfd = info->output_bfd;
5407 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5408 struct elf_x86_link_hash_table *htab
5409 = elf_x86_hash_table (info, X86_64_ELF_DATA);
5411 if (htab->elf.dynsym != NULL
5412 && htab->elf.dynsym->contents != NULL)
5414 /* Check relocation against STT_GNU_IFUNC symbol if there are
5416 unsigned long r_symndx = htab->r_sym (rela->r_info);
5417 if (r_symndx != STN_UNDEF)
5419 Elf_Internal_Sym sym;
5420 if (!bed->s->swap_symbol_in (abfd,
5421 (htab->elf.dynsym->contents
5422 + r_symndx * bed->s->sizeof_sym),
5426 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5427 return reloc_class_ifunc;
5431 switch ((int) ELF32_R_TYPE (rela->r_info))
5433 case R_X86_64_IRELATIVE:
5434 return reloc_class_ifunc;
5435 case R_X86_64_RELATIVE:
5436 case R_X86_64_RELATIVE64:
5437 return reloc_class_relative;
5438 case R_X86_64_JUMP_SLOT:
5439 return reloc_class_plt;
5441 return reloc_class_copy;
5443 return reloc_class_normal;
5447 /* Finish up the dynamic sections. */
5450 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
5451 struct bfd_link_info *info)
5453 struct elf_x86_link_hash_table *htab;
5457 htab = elf_x86_hash_table (info, X86_64_ELF_DATA);
5461 dynobj = htab->elf.dynobj;
5462 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5464 if (htab->elf.dynamic_sections_created)
5466 bfd_byte *dyncon, *dynconend;
5467 const struct elf_backend_data *bed;
5468 bfd_size_type sizeof_dyn;
5470 if (sdyn == NULL || htab->elf.sgot == NULL)
5473 bed = get_elf_backend_data (dynobj);
5474 sizeof_dyn = bed->s->sizeof_dyn;
5475 dyncon = sdyn->contents;
5476 dynconend = sdyn->contents + sdyn->size;
5477 for (; dyncon < dynconend; dyncon += sizeof_dyn)
5479 Elf_Internal_Dyn dyn;
5482 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
5490 s = htab->elf.sgotplt;
5491 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5495 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
5499 s = htab->elf.srelplt->output_section;
5500 dyn.d_un.d_val = s->size;
5503 case DT_TLSDESC_PLT:
5505 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5506 + htab->tlsdesc_plt;
5509 case DT_TLSDESC_GOT:
5511 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
5512 + htab->tlsdesc_got;
5516 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
5519 if (htab->elf.splt && htab->elf.splt->size > 0)
5521 elf_section_data (htab->elf.splt->output_section)
5522 ->this_hdr.sh_entsize = htab->plt.plt_entry_size;
5524 if (htab->plt.has_plt0)
5526 /* Fill in the special first entry in the procedure linkage
5528 memcpy (htab->elf.splt->contents,
5529 htab->lazy_plt->plt0_entry,
5530 htab->lazy_plt->plt0_entry_size);
5531 /* Add offset for pushq GOT+8(%rip), since the instruction
5532 uses 6 bytes subtract this value. */
5533 bfd_put_32 (output_bfd,
5534 (htab->elf.sgotplt->output_section->vma
5535 + htab->elf.sgotplt->output_offset
5537 - htab->elf.splt->output_section->vma
5538 - htab->elf.splt->output_offset
5540 (htab->elf.splt->contents
5541 + htab->lazy_plt->plt0_got1_offset));
5542 /* Add offset for the PC-relative instruction accessing
5543 GOT+16, subtracting the offset to the end of that
5545 bfd_put_32 (output_bfd,
5546 (htab->elf.sgotplt->output_section->vma
5547 + htab->elf.sgotplt->output_offset
5549 - htab->elf.splt->output_section->vma
5550 - htab->elf.splt->output_offset
5551 - htab->lazy_plt->plt0_got2_insn_end),
5552 (htab->elf.splt->contents
5553 + htab->lazy_plt->plt0_got2_offset));
5555 if (htab->tlsdesc_plt)
5557 bfd_put_64 (output_bfd, (bfd_vma) 0,
5558 htab->elf.sgot->contents + htab->tlsdesc_got);
5560 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
5561 htab->lazy_plt->plt0_entry,
5562 htab->lazy_plt->plt0_entry_size);
5564 /* Add offset for pushq GOT+8(%rip), since the
5565 instruction uses 6 bytes subtract this value. */
5566 bfd_put_32 (output_bfd,
5567 (htab->elf.sgotplt->output_section->vma
5568 + htab->elf.sgotplt->output_offset
5570 - htab->elf.splt->output_section->vma
5571 - htab->elf.splt->output_offset
5574 (htab->elf.splt->contents
5576 + htab->lazy_plt->plt0_got1_offset));
5577 /* Add offset for the PC-relative instruction accessing
5578 GOT+TDG, where TDG stands for htab->tlsdesc_got,
5579 subtracting the offset to the end of that
5581 bfd_put_32 (output_bfd,
5582 (htab->elf.sgot->output_section->vma
5583 + htab->elf.sgot->output_offset
5585 - htab->elf.splt->output_section->vma
5586 - htab->elf.splt->output_offset
5588 - htab->lazy_plt->plt0_got2_insn_end),
5589 (htab->elf.splt->contents
5591 + htab->lazy_plt->plt0_got2_offset));
5596 if (htab->plt_got != NULL && htab->plt_got->size > 0)
5597 elf_section_data (htab->plt_got->output_section)
5598 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
5600 if (htab->plt_second != NULL && htab->plt_second->size > 0)
5601 elf_section_data (htab->plt_second->output_section)
5602 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
5605 /* GOT is always created in setup_gnu_properties. But it may not be
5607 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
5609 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5612 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5616 /* Set the first entry in the global offset table to the address of
5617 the dynamic section. */
5619 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
5621 bfd_put_64 (output_bfd,
5622 sdyn->output_section->vma + sdyn->output_offset,
5623 htab->elf.sgotplt->contents);
5624 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
5625 bfd_put_64 (output_bfd, (bfd_vma) 0,
5626 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
5627 bfd_put_64 (output_bfd, (bfd_vma) 0,
5628 htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
5630 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize
5634 /* Adjust .eh_frame for .plt section. */
5635 if (htab->plt_eh_frame != NULL
5636 && htab->plt_eh_frame->contents != NULL)
5638 if (htab->elf.splt != NULL
5639 && htab->elf.splt->size != 0
5640 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5641 && htab->elf.splt->output_section != NULL
5642 && htab->plt_eh_frame->output_section != NULL)
5644 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5645 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5646 + htab->plt_eh_frame->output_offset
5647 + PLT_FDE_START_OFFSET;
5648 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5649 htab->plt_eh_frame->contents
5650 + PLT_FDE_START_OFFSET);
5652 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5654 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5656 htab->plt_eh_frame->contents))
5661 /* Adjust .eh_frame for .plt.got section. */
5662 if (htab->plt_got_eh_frame != NULL
5663 && htab->plt_got_eh_frame->contents != NULL)
5665 if (htab->plt_got != NULL
5666 && htab->plt_got->size != 0
5667 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
5668 && htab->plt_got->output_section != NULL
5669 && htab->plt_got_eh_frame->output_section != NULL)
5671 bfd_vma plt_start = htab->plt_got->output_section->vma;
5672 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
5673 + htab->plt_got_eh_frame->output_offset
5674 + PLT_FDE_START_OFFSET;
5675 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5676 htab->plt_got_eh_frame->contents
5677 + PLT_FDE_START_OFFSET);
5679 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5681 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5682 htab->plt_got_eh_frame,
5683 htab->plt_got_eh_frame->contents))
5688 /* Adjust .eh_frame for the second PLT section. */
5689 if (htab->plt_second_eh_frame != NULL
5690 && htab->plt_second_eh_frame->contents != NULL)
5692 if (htab->plt_second != NULL
5693 && htab->plt_second->size != 0
5694 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
5695 && htab->plt_second->output_section != NULL
5696 && htab->plt_second_eh_frame->output_section != NULL)
5698 bfd_vma plt_start = htab->plt_second->output_section->vma;
5699 bfd_vma eh_frame_start
5700 = (htab->plt_second_eh_frame->output_section->vma
5701 + htab->plt_second_eh_frame->output_offset
5702 + PLT_FDE_START_OFFSET);
5703 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5704 htab->plt_second_eh_frame->contents
5705 + PLT_FDE_START_OFFSET);
5707 if (htab->plt_second_eh_frame->sec_info_type
5708 == SEC_INFO_TYPE_EH_FRAME)
5710 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5711 htab->plt_second_eh_frame,
5712 htab->plt_second_eh_frame->contents))
5717 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5718 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
5721 /* Fill PLT entries for undefined weak symbols in PIE. */
5722 if (bfd_link_pie (info))
5723 bfd_hash_traverse (&info->hash->table,
5724 elf_x86_64_pie_finish_undefweak_symbol,
5730 /* Fill PLT/GOT entries and allocate dynamic relocations for local
5731 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5732 It has to be done before elf_link_sort_relocs is called so that
5733 dynamic relocations are properly sorted. */
5736 elf_x86_64_output_arch_local_syms
5737 (bfd *output_bfd ATTRIBUTE_UNUSED,
5738 struct bfd_link_info *info,
5739 void *flaginfo ATTRIBUTE_UNUSED,
5740 int (*func) (void *, const char *,
5743 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
5745 struct elf_x86_link_hash_table *htab
5746 = elf_x86_hash_table (info, X86_64_ELF_DATA);
5750 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5751 htab_traverse (htab->loc_hash_table,
5752 elf_x86_64_finish_local_dynamic_symbol,
5758 /* Forward declaration. */
5759 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt;
5761 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
5762 dynamic relocations. */
5765 elf_x86_64_get_synthetic_symtab (bfd *abfd,
5766 long symcount ATTRIBUTE_UNUSED,
5767 asymbol **syms ATTRIBUTE_UNUSED,
5774 bfd_byte *plt_contents;
5776 const struct elf_x86_lazy_plt_layout *lazy_plt;
5777 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
5778 const struct elf_x86_lazy_plt_layout *lazy_bnd_plt;
5779 const struct elf_x86_non_lazy_plt_layout *non_lazy_bnd_plt;
5780 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
5781 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
5783 enum elf_x86_plt_type plt_type;
5784 struct elf_x86_plt plts[] =
5786 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
5787 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
5788 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
5789 { ".plt.bnd", NULL, NULL, plt_second, 0, 0, 0, 0 },
5790 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
5795 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
5798 if (dynsymcount <= 0)
5801 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
5805 if (get_elf_x86_64_backend_data (abfd)->os == is_normal)
5807 lazy_plt = &elf_x86_64_lazy_plt;
5808 non_lazy_plt = &elf_x86_64_non_lazy_plt;
5809 lazy_bnd_plt = &elf_x86_64_lazy_bnd_plt;
5810 non_lazy_bnd_plt = &elf_x86_64_non_lazy_bnd_plt;
5811 if (ABI_64_P (abfd))
5813 lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt;
5814 non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt;
5818 lazy_ibt_plt = &elf_x32_lazy_ibt_plt;
5819 non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt;
5824 lazy_plt = &elf_x86_64_nacl_plt;
5825 non_lazy_plt = NULL;
5826 lazy_bnd_plt = NULL;
5827 non_lazy_bnd_plt = NULL;
5828 lazy_ibt_plt = NULL;
5829 non_lazy_ibt_plt = NULL;
5833 for (j = 0; plts[j].name != NULL; j++)
5835 plt = bfd_get_section_by_name (abfd, plts[j].name);
5836 if (plt == NULL || plt->size == 0)
5839 /* Get the PLT section contents. */
5840 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5841 if (plt_contents == NULL)
5843 if (!bfd_get_section_contents (abfd, (asection *) plt,
5844 plt_contents, 0, plt->size))
5846 free (plt_contents);
5850 /* Check what kind of PLT it is. */
5851 plt_type = plt_unknown;
5852 if (plts[j].type == plt_unknown
5853 && (plt->size >= (lazy_plt->plt_entry_size
5854 + lazy_plt->plt_entry_size)))
5856 /* Match lazy PLT first. Need to check the first two
5858 if ((memcmp (plt_contents, lazy_plt->plt0_entry,
5859 lazy_plt->plt0_got1_offset) == 0)
5860 && (memcmp (plt_contents + 6, lazy_plt->plt0_entry + 6,
5862 plt_type = plt_lazy;
5863 else if (lazy_bnd_plt != NULL
5864 && (memcmp (plt_contents, lazy_bnd_plt->plt0_entry,
5865 lazy_bnd_plt->plt0_got1_offset) == 0)
5866 && (memcmp (plt_contents + 6,
5867 lazy_bnd_plt->plt0_entry + 6, 3) == 0))
5869 plt_type = plt_lazy | plt_second;
5870 /* The fist entry in the lazy IBT PLT is the same as the
5872 if ((memcmp (plt_contents + lazy_ibt_plt->plt_entry_size,
5873 lazy_ibt_plt->plt_entry,
5874 lazy_ibt_plt->plt_got_offset) == 0))
5875 lazy_plt = lazy_ibt_plt;
5877 lazy_plt = lazy_bnd_plt;
5881 if (non_lazy_plt != NULL
5882 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
5883 && plt->size >= non_lazy_plt->plt_entry_size)
5885 /* Match non-lazy PLT. */
5886 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
5887 non_lazy_plt->plt_got_offset) == 0)
5888 plt_type = plt_non_lazy;
5891 if (plt_type == plt_unknown || plt_type == plt_second)
5893 if (non_lazy_bnd_plt != NULL
5894 && plt->size >= non_lazy_bnd_plt->plt_entry_size
5895 && (memcmp (plt_contents, non_lazy_bnd_plt->plt_entry,
5896 non_lazy_bnd_plt->plt_got_offset) == 0))
5898 /* Match BND PLT. */
5899 plt_type = plt_second;
5900 non_lazy_plt = non_lazy_bnd_plt;
5902 else if (non_lazy_ibt_plt != NULL
5903 && plt->size >= non_lazy_ibt_plt->plt_entry_size
5904 && (memcmp (plt_contents,
5905 non_lazy_ibt_plt->plt_entry,
5906 non_lazy_ibt_plt->plt_got_offset) == 0))
5908 /* Match IBT PLT. */
5909 plt_type = plt_second;
5910 non_lazy_plt = non_lazy_ibt_plt;
5914 if (plt_type == plt_unknown)
5916 free (plt_contents);
5921 plts[j].type = plt_type;
5923 if ((plt_type & plt_lazy))
5925 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
5926 plts[j].plt_got_insn_size = lazy_plt->plt_got_insn_size;
5927 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
5928 /* Skip PLT0 in lazy PLT. */
5933 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
5934 plts[j].plt_got_insn_size = non_lazy_plt->plt_got_insn_size;
5935 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
5939 /* Skip lazy PLT when the second PLT is used. */
5940 if (plt_type == (plt_lazy | plt_second))
5944 n = plt->size / plts[j].plt_entry_size;
5949 plts[j].contents = plt_contents;
5952 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
5953 (bfd_vma) 0, plts, dynsyms,
5957 /* Handle an x86-64 specific section when reading an object file. This
5958 is called when elfcode.h finds a section with an unknown type. */
5961 elf_x86_64_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr,
5962 const char *name, int shindex)
5964 if (hdr->sh_type != SHT_X86_64_UNWIND)
5967 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
5973 /* Hook called by the linker routine which adds symbols from an object
5974 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
5978 elf_x86_64_add_symbol_hook (bfd *abfd,
5979 struct bfd_link_info *info ATTRIBUTE_UNUSED,
5980 Elf_Internal_Sym *sym,
5981 const char **namep ATTRIBUTE_UNUSED,
5982 flagword *flagsp ATTRIBUTE_UNUSED,
5988 switch (sym->st_shndx)
5990 case SHN_X86_64_LCOMMON:
5991 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
5994 lcomm = bfd_make_section_with_flags (abfd,
5998 | SEC_LINKER_CREATED));
6001 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
6004 *valp = sym->st_size;
6012 /* Given a BFD section, try to locate the corresponding ELF section
6016 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
6017 asection *sec, int *index_return)
6019 if (sec == &_bfd_elf_large_com_section)
6021 *index_return = SHN_X86_64_LCOMMON;
6027 /* Process a symbol. */
6030 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
6033 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
6035 switch (elfsym->internal_elf_sym.st_shndx)
6037 case SHN_X86_64_LCOMMON:
6038 asym->section = &_bfd_elf_large_com_section;
6039 asym->value = elfsym->internal_elf_sym.st_size;
6040 /* Common symbol doesn't set BSF_GLOBAL. */
6041 asym->flags &= ~BSF_GLOBAL;
6047 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
6049 return (sym->st_shndx == SHN_COMMON
6050 || sym->st_shndx == SHN_X86_64_LCOMMON);
6054 elf_x86_64_common_section_index (asection *sec)
6056 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
6059 return SHN_X86_64_LCOMMON;
6063 elf_x86_64_common_section (asection *sec)
6065 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
6066 return bfd_com_section_ptr;
6068 return &_bfd_elf_large_com_section;
6072 elf_x86_64_merge_symbol (struct elf_link_hash_entry *h,
6073 const Elf_Internal_Sym *sym,
6078 const asection *oldsec)
6080 /* A normal common symbol and a large common symbol result in a
6081 normal common symbol. We turn the large common symbol into a
6084 && h->root.type == bfd_link_hash_common
6086 && bfd_is_com_section (*psec)
6089 if (sym->st_shndx == SHN_COMMON
6090 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) != 0)
6092 h->root.u.c.p->section
6093 = bfd_make_section_old_way (oldbfd, "COMMON");
6094 h->root.u.c.p->section->flags = SEC_ALLOC;
6096 else if (sym->st_shndx == SHN_X86_64_LCOMMON
6097 && (elf_section_flags (oldsec) & SHF_X86_64_LARGE) == 0)
6098 *psec = bfd_com_section_ptr;
6105 elf_x86_64_additional_program_headers (bfd *abfd,
6106 struct bfd_link_info *info ATTRIBUTE_UNUSED)
6111 /* Check to see if we need a large readonly segment. */
6112 s = bfd_get_section_by_name (abfd, ".lrodata");
6113 if (s && (s->flags & SEC_LOAD))
6116 /* Check to see if we need a large data segment. Since .lbss sections
6117 is placed right after the .bss section, there should be no need for
6118 a large data segment just because of .lbss. */
6119 s = bfd_get_section_by_name (abfd, ".ldata");
6120 if (s && (s->flags & SEC_LOAD))
6126 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
6129 elf_x86_64_relocs_compatible (const bfd_target *input,
6130 const bfd_target *output)
6132 return ((xvec_get_elf_backend_data (input)->s->elfclass
6133 == xvec_get_elf_backend_data (output)->s->elfclass)
6134 && _bfd_elf_relocs_compatible (input, output));
6137 /* Set up x86-64 GNU properties. Return the first relocatable ELF input
6138 with GNU properties if found. Otherwise, return NULL. */
6141 elf_x86_64_link_setup_gnu_properties (struct bfd_link_info *info)
6143 struct elf_x86_plt_layout_table plt_layout;
6145 plt_layout.is_vxworks = FALSE;
6146 if (get_elf_x86_64_backend_data (info->output_bfd)->os == is_normal)
6150 plt_layout.lazy_plt = &elf_x86_64_lazy_bnd_plt;
6151 plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_bnd_plt;
6155 plt_layout.lazy_plt = &elf_x86_64_lazy_plt;
6156 plt_layout.non_lazy_plt = &elf_x86_64_non_lazy_plt;
6159 if (ABI_64_P (info->output_bfd))
6161 plt_layout.lazy_ibt_plt = &elf_x86_64_lazy_ibt_plt;
6162 plt_layout.non_lazy_ibt_plt = &elf_x86_64_non_lazy_ibt_plt;
6166 plt_layout.lazy_ibt_plt = &elf_x32_lazy_ibt_plt;
6167 plt_layout.non_lazy_ibt_plt = &elf_x32_non_lazy_ibt_plt;
6169 plt_layout.normal_target = TRUE;
6173 plt_layout.lazy_plt = &elf_x86_64_nacl_plt;
6174 plt_layout.non_lazy_plt = NULL;
6175 plt_layout.lazy_ibt_plt = NULL;
6176 plt_layout.non_lazy_ibt_plt = NULL;
6177 plt_layout.normal_target = FALSE;
6180 return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout);
6183 static const struct bfd_elf_special_section
6184 elf_x86_64_special_sections[]=
6186 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6187 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6188 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
6189 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6190 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
6191 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
6192 { NULL, 0, 0, 0, 0 }
6195 #define TARGET_LITTLE_SYM x86_64_elf64_vec
6196 #define TARGET_LITTLE_NAME "elf64-x86-64"
6197 #define ELF_ARCH bfd_arch_i386
6198 #define ELF_TARGET_ID X86_64_ELF_DATA
6199 #define ELF_MACHINE_CODE EM_X86_64
6200 #define ELF_MAXPAGESIZE 0x200000
6201 #define ELF_MINPAGESIZE 0x1000
6202 #define ELF_COMMONPAGESIZE 0x1000
6204 #define elf_backend_can_gc_sections 1
6205 #define elf_backend_can_refcount 1
6206 #define elf_backend_want_got_plt 1
6207 #define elf_backend_plt_readonly 1
6208 #define elf_backend_want_plt_sym 0
6209 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
6210 #define elf_backend_rela_normal 1
6211 #define elf_backend_plt_alignment 4
6212 #define elf_backend_extern_protected_data 1
6213 #define elf_backend_caches_rawsize 1
6214 #define elf_backend_dtrel_excludes_plt 1
6215 #define elf_backend_want_dynrelro 1
6217 #define elf_info_to_howto elf_x86_64_info_to_howto
6219 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
6220 #define bfd_elf64_bfd_reloc_name_lookup \
6221 elf_x86_64_reloc_name_lookup
6223 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
6224 #define elf_backend_check_relocs elf_x86_64_check_relocs
6225 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
6226 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
6227 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
6228 #define elf_backend_output_arch_local_syms elf_x86_64_output_arch_local_syms
6229 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
6230 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
6232 #define elf_backend_write_core_note elf_x86_64_write_core_note
6234 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
6235 #define elf_backend_relocate_section elf_x86_64_relocate_section
6236 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
6237 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
6238 #define elf_backend_object_p elf64_x86_64_elf_object_p
6239 #define bfd_elf64_get_synthetic_symtab elf_x86_64_get_synthetic_symtab
6241 #define elf_backend_section_from_shdr \
6242 elf_x86_64_section_from_shdr
6244 #define elf_backend_section_from_bfd_section \
6245 elf_x86_64_elf_section_from_bfd_section
6246 #define elf_backend_add_symbol_hook \
6247 elf_x86_64_add_symbol_hook
6248 #define elf_backend_symbol_processing \
6249 elf_x86_64_symbol_processing
6250 #define elf_backend_common_section_index \
6251 elf_x86_64_common_section_index
6252 #define elf_backend_common_section \
6253 elf_x86_64_common_section
6254 #define elf_backend_common_definition \
6255 elf_x86_64_common_definition
6256 #define elf_backend_merge_symbol \
6257 elf_x86_64_merge_symbol
6258 #define elf_backend_special_sections \
6259 elf_x86_64_special_sections
6260 #define elf_backend_additional_program_headers \
6261 elf_x86_64_additional_program_headers
6262 #define elf_backend_setup_gnu_properties \
6263 elf_x86_64_link_setup_gnu_properties
6265 #include "elf64-target.h"
6267 /* CloudABI support. */
6269 #undef TARGET_LITTLE_SYM
6270 #define TARGET_LITTLE_SYM x86_64_elf64_cloudabi_vec
6271 #undef TARGET_LITTLE_NAME
6272 #define TARGET_LITTLE_NAME "elf64-x86-64-cloudabi"
6275 #define ELF_OSABI ELFOSABI_CLOUDABI
6278 #define elf64_bed elf64_x86_64_cloudabi_bed
6280 #include "elf64-target.h"
6282 /* FreeBSD support. */
6284 #undef TARGET_LITTLE_SYM
6285 #define TARGET_LITTLE_SYM x86_64_elf64_fbsd_vec
6286 #undef TARGET_LITTLE_NAME
6287 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
6290 #define ELF_OSABI ELFOSABI_FREEBSD
6293 #define elf64_bed elf64_x86_64_fbsd_bed
6295 #include "elf64-target.h"
6297 /* Solaris 2 support. */
6299 #undef TARGET_LITTLE_SYM
6300 #define TARGET_LITTLE_SYM x86_64_elf64_sol2_vec
6301 #undef TARGET_LITTLE_NAME
6302 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
6304 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6305 objects won't be recognized. */
6309 #define elf64_bed elf64_x86_64_sol2_bed
6311 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
6313 #undef elf_backend_static_tls_alignment
6314 #define elf_backend_static_tls_alignment 16
6316 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6318 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6320 #undef elf_backend_want_plt_sym
6321 #define elf_backend_want_plt_sym 1
6323 #undef elf_backend_strtab_flags
6324 #define elf_backend_strtab_flags SHF_STRINGS
6327 elf64_x86_64_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
6328 bfd *obfd ATTRIBUTE_UNUSED,
6329 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
6330 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
6332 /* PR 19938: FIXME: Need to add code for setting the sh_info
6333 and sh_link fields of Solaris specific section types. */
6337 #undef elf_backend_copy_special_section_fields
6338 #define elf_backend_copy_special_section_fields elf64_x86_64_copy_solaris_special_section_fields
6340 #include "elf64-target.h"
6342 /* Native Client support. */
6345 elf64_x86_64_nacl_elf_object_p (bfd *abfd)
6347 /* Set the right machine number for a NaCl x86-64 ELF64 file. */
6348 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64_nacl);
6352 #undef TARGET_LITTLE_SYM
6353 #define TARGET_LITTLE_SYM x86_64_elf64_nacl_vec
6354 #undef TARGET_LITTLE_NAME
6355 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
6357 #define elf64_bed elf64_x86_64_nacl_bed
6359 #undef ELF_MAXPAGESIZE
6360 #undef ELF_MINPAGESIZE
6361 #undef ELF_COMMONPAGESIZE
6362 #define ELF_MAXPAGESIZE 0x10000
6363 #define ELF_MINPAGESIZE 0x10000
6364 #define ELF_COMMONPAGESIZE 0x10000
6366 /* Restore defaults. */
6368 #undef elf_backend_static_tls_alignment
6369 #undef elf_backend_want_plt_sym
6370 #define elf_backend_want_plt_sym 0
6371 #undef elf_backend_strtab_flags
6372 #undef elf_backend_copy_special_section_fields
6374 /* NaCl uses substantially different PLT entries for the same effects. */
6376 #undef elf_backend_plt_alignment
6377 #define elf_backend_plt_alignment 5
6378 #define NACL_PLT_ENTRY_SIZE 64
6379 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6381 static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
6383 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
6384 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
6385 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6386 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6387 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6389 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
6390 0x66, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw 0x0(%rax,%rax,1) */
6392 /* 32 bytes of nop to pad out to the standard size. */
6393 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
6394 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6395 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
6396 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6397 0x66, /* excess data16 prefix */
6401 static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6403 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
6404 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
6405 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
6406 0x41, 0xff, 0xe3, /* jmpq *%r11 */
6408 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
6409 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
6410 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6412 /* Lazy GOT entries point here (32-byte aligned). */
6413 0x68, /* pushq immediate */
6414 0, 0, 0, 0, /* replaced with index into relocation table. */
6415 0xe9, /* jmp relative */
6416 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
6418 /* 22 bytes of nop to pad out to the standard size. */
6419 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data16 prefixes */
6420 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
6421 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
6424 /* .eh_frame covering the .plt section. */
6426 static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
6428 #if (PLT_CIE_LENGTH != 20 \
6429 || PLT_FDE_LENGTH != 36 \
6430 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6431 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6432 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
6434 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6435 0, 0, 0, 0, /* CIE ID */
6436 1, /* CIE version */
6437 'z', 'R', 0, /* Augmentation string */
6438 1, /* Code alignment factor */
6439 0x78, /* Data alignment factor */
6440 16, /* Return address column */
6441 1, /* Augmentation size */
6442 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6443 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
6444 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
6445 DW_CFA_nop, DW_CFA_nop,
6447 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6448 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
6449 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
6450 0, 0, 0, 0, /* .plt size goes here */
6451 0, /* Augmentation size */
6452 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
6453 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6454 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
6455 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6456 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6457 13, /* Block length */
6458 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
6459 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
6460 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6461 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
6462 DW_CFA_nop, DW_CFA_nop
6465 static const struct elf_x86_lazy_plt_layout elf_x86_64_nacl_plt =
6467 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
6468 NACL_PLT_ENTRY_SIZE, /* plt0_entry_size */
6469 elf_x86_64_nacl_plt_entry, /* plt_entry */
6470 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6471 2, /* plt0_got1_offset */
6472 9, /* plt0_got2_offset */
6473 13, /* plt0_got2_insn_end */
6474 3, /* plt_got_offset */
6475 33, /* plt_reloc_offset */
6476 38, /* plt_plt_offset */
6477 7, /* plt_got_insn_size */
6478 42, /* plt_plt_insn_end */
6479 32, /* plt_lazy_offset */
6480 elf_x86_64_nacl_plt0_entry, /* pic_plt0_entry */
6481 elf_x86_64_nacl_plt_entry, /* pic_plt_entry */
6482 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
6483 sizeof (elf_x86_64_nacl_eh_frame_plt) /* eh_frame_plt_size */
6486 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
6491 #undef elf_backend_arch_data
6492 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
6494 #undef elf_backend_object_p
6495 #define elf_backend_object_p elf64_x86_64_nacl_elf_object_p
6496 #undef elf_backend_modify_segment_map
6497 #define elf_backend_modify_segment_map nacl_modify_segment_map
6498 #undef elf_backend_modify_program_headers
6499 #define elf_backend_modify_program_headers nacl_modify_program_headers
6500 #undef elf_backend_final_write_processing
6501 #define elf_backend_final_write_processing nacl_final_write_processing
6503 #include "elf64-target.h"
6505 /* Native Client x32 support. */
6508 elf32_x86_64_nacl_elf_object_p (bfd *abfd)
6510 /* Set the right machine number for a NaCl x86-64 ELF32 file. */
6511 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32_nacl);
6515 #undef TARGET_LITTLE_SYM
6516 #define TARGET_LITTLE_SYM x86_64_elf32_nacl_vec
6517 #undef TARGET_LITTLE_NAME
6518 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
6520 #define elf32_bed elf32_x86_64_nacl_bed
6522 #define bfd_elf32_bfd_reloc_type_lookup \
6523 elf_x86_64_reloc_type_lookup
6524 #define bfd_elf32_bfd_reloc_name_lookup \
6525 elf_x86_64_reloc_name_lookup
6526 #define bfd_elf32_get_synthetic_symtab \
6527 elf_x86_64_get_synthetic_symtab
6529 #undef elf_backend_object_p
6530 #define elf_backend_object_p \
6531 elf32_x86_64_nacl_elf_object_p
6533 #undef elf_backend_bfd_from_remote_memory
6534 #define elf_backend_bfd_from_remote_memory \
6535 _bfd_elf32_bfd_from_remote_memory
6537 #undef elf_backend_size_info
6538 #define elf_backend_size_info \
6539 _bfd_elf32_size_info
6541 #include "elf32-target.h"
6543 /* Restore defaults. */
6544 #undef elf_backend_object_p
6545 #define elf_backend_object_p elf64_x86_64_elf_object_p
6546 #undef elf_backend_bfd_from_remote_memory
6547 #undef elf_backend_size_info
6548 #undef elf_backend_modify_segment_map
6549 #undef elf_backend_modify_program_headers
6550 #undef elf_backend_final_write_processing
6552 /* Intel L1OM support. */
6555 elf64_l1om_elf_object_p (bfd *abfd)
6557 /* Set the right machine number for an L1OM elf64 file. */
6558 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
6562 #undef TARGET_LITTLE_SYM
6563 #define TARGET_LITTLE_SYM l1om_elf64_vec
6564 #undef TARGET_LITTLE_NAME
6565 #define TARGET_LITTLE_NAME "elf64-l1om"
6567 #define ELF_ARCH bfd_arch_l1om
6569 #undef ELF_MACHINE_CODE
6570 #define ELF_MACHINE_CODE EM_L1OM
6575 #define elf64_bed elf64_l1om_bed
6577 #undef elf_backend_object_p
6578 #define elf_backend_object_p elf64_l1om_elf_object_p
6580 /* Restore defaults. */
6581 #undef ELF_MAXPAGESIZE
6582 #undef ELF_MINPAGESIZE
6583 #undef ELF_COMMONPAGESIZE
6584 #define ELF_MAXPAGESIZE 0x200000
6585 #define ELF_MINPAGESIZE 0x1000
6586 #define ELF_COMMONPAGESIZE 0x1000
6587 #undef elf_backend_plt_alignment
6588 #define elf_backend_plt_alignment 4
6589 #undef elf_backend_arch_data
6590 #define elf_backend_arch_data &elf_x86_64_arch_bed
6592 #include "elf64-target.h"
6594 /* FreeBSD L1OM support. */
6596 #undef TARGET_LITTLE_SYM
6597 #define TARGET_LITTLE_SYM l1om_elf64_fbsd_vec
6598 #undef TARGET_LITTLE_NAME
6599 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
6602 #define ELF_OSABI ELFOSABI_FREEBSD
6605 #define elf64_bed elf64_l1om_fbsd_bed
6607 #include "elf64-target.h"
6609 /* Intel K1OM support. */
6612 elf64_k1om_elf_object_p (bfd *abfd)
6614 /* Set the right machine number for an K1OM elf64 file. */
6615 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
6619 #undef TARGET_LITTLE_SYM
6620 #define TARGET_LITTLE_SYM k1om_elf64_vec
6621 #undef TARGET_LITTLE_NAME
6622 #define TARGET_LITTLE_NAME "elf64-k1om"
6624 #define ELF_ARCH bfd_arch_k1om
6626 #undef ELF_MACHINE_CODE
6627 #define ELF_MACHINE_CODE EM_K1OM
6632 #define elf64_bed elf64_k1om_bed
6634 #undef elf_backend_object_p
6635 #define elf_backend_object_p elf64_k1om_elf_object_p
6637 #undef elf_backend_static_tls_alignment
6639 #undef elf_backend_want_plt_sym
6640 #define elf_backend_want_plt_sym 0
6642 #include "elf64-target.h"
6644 /* FreeBSD K1OM support. */
6646 #undef TARGET_LITTLE_SYM
6647 #define TARGET_LITTLE_SYM k1om_elf64_fbsd_vec
6648 #undef TARGET_LITTLE_NAME
6649 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
6652 #define ELF_OSABI ELFOSABI_FREEBSD
6655 #define elf64_bed elf64_k1om_fbsd_bed
6657 #include "elf64-target.h"
6659 /* 32bit x86-64 support. */
6661 #undef TARGET_LITTLE_SYM
6662 #define TARGET_LITTLE_SYM x86_64_elf32_vec
6663 #undef TARGET_LITTLE_NAME
6664 #define TARGET_LITTLE_NAME "elf32-x86-64"
6668 #define ELF_ARCH bfd_arch_i386
6670 #undef ELF_MACHINE_CODE
6671 #define ELF_MACHINE_CODE EM_X86_64
6675 #undef elf_backend_object_p
6676 #define elf_backend_object_p \
6677 elf32_x86_64_elf_object_p
6679 #undef elf_backend_bfd_from_remote_memory
6680 #define elf_backend_bfd_from_remote_memory \
6681 _bfd_elf32_bfd_from_remote_memory
6683 #undef elf_backend_size_info
6684 #define elf_backend_size_info \
6685 _bfd_elf32_size_info
6687 #include "elf32-target.h"