1 /* X86-64 specific support for ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
4 Free Software Foundation, Inc.
5 Contributed by Jan Hubicka <jh@suse.cz>.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
30 #include "bfd_stdint.h"
34 #include "libiberty.h"
36 #include "elf/x86-64.h"
43 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
44 #define MINUS_ONE (~ (bfd_vma) 0)
46 /* Since both 32-bit and 64-bit x86-64 encode relocation type in the
47 identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get
48 relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE
49 since they are the same. */
51 #define ABI_64_P(abfd) \
52 (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64)
54 /* The relocation "howto" table. Order of fields:
55 type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow,
56 special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */
57 static reloc_howto_type x86_64_elf_howto_table[] =
59 HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont,
60 bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000,
62 HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE,
65 HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
66 bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff,
68 HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
69 bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff,
71 HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
72 bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff,
74 HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff,
77 HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE,
80 HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE,
83 HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE,
86 HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed,
87 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff,
89 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
90 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
92 HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed,
93 bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff,
95 HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE),
97 HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE),
99 HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE),
101 HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
102 bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE),
103 HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE,
106 HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE,
109 HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE,
112 HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
113 bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff,
115 HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed,
116 bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff,
118 HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
119 bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff,
121 HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed,
122 bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff,
124 HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed,
125 bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff,
127 HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE,
130 HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_X86_64_GOTOFF64",
132 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
133 HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed,
134 bfd_elf_generic_reloc, "R_X86_64_GOTPC32",
135 FALSE, 0xffffffff, 0xffffffff, TRUE),
136 HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
137 bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE,
139 HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
140 bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE,
142 HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed,
143 bfd_elf_generic_reloc, "R_X86_64_GOTPC64",
144 FALSE, MINUS_ONE, MINUS_ONE, TRUE),
145 HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
146 bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE,
148 HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed,
149 bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE,
153 HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0,
154 complain_overflow_bitfield, bfd_elf_generic_reloc,
155 "R_X86_64_GOTPC32_TLSDESC",
156 FALSE, 0xffffffff, 0xffffffff, TRUE),
157 HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0,
158 complain_overflow_dont, bfd_elf_generic_reloc,
159 "R_X86_64_TLSDESC_CALL",
161 HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0,
162 complain_overflow_bitfield, bfd_elf_generic_reloc,
164 FALSE, MINUS_ONE, MINUS_ONE, FALSE),
165 HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE,
168 HOWTO(R_X86_64_RELATIVE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_X86_64_RELATIVE64", FALSE, MINUS_ONE,
172 /* We have a gap in the reloc numbers here.
173 R_X86_64_standard counts the number up to this point, and
174 R_X86_64_vt_offset is the value to subtract from a reloc type of
175 R_X86_64_GNU_VT* to form an index into this table. */
176 #define R_X86_64_standard (R_X86_64_IRELATIVE + 1)
177 #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard)
179 /* GNU extension to record C++ vtable hierarchy. */
180 HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont,
181 NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE),
183 /* GNU extension to record C++ vtable member usage. */
184 HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont,
185 _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0,
188 /* Use complain_overflow_bitfield on R_X86_64_32 for x32. */
189 HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
190 bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff,
194 #define IS_X86_64_PCREL_TYPE(TYPE) \
195 ( ((TYPE) == R_X86_64_PC8) \
196 || ((TYPE) == R_X86_64_PC16) \
197 || ((TYPE) == R_X86_64_PC32) \
198 || ((TYPE) == R_X86_64_PC64))
200 /* Map BFD relocs to the x86_64 elf relocs. */
203 bfd_reloc_code_real_type bfd_reloc_val;
204 unsigned char elf_reloc_val;
207 static const struct elf_reloc_map x86_64_reloc_map[] =
209 { BFD_RELOC_NONE, R_X86_64_NONE, },
210 { BFD_RELOC_64, R_X86_64_64, },
211 { BFD_RELOC_32_PCREL, R_X86_64_PC32, },
212 { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,},
213 { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,},
214 { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, },
215 { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, },
216 { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, },
217 { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, },
218 { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, },
219 { BFD_RELOC_32, R_X86_64_32, },
220 { BFD_RELOC_X86_64_32S, R_X86_64_32S, },
221 { BFD_RELOC_16, R_X86_64_16, },
222 { BFD_RELOC_16_PCREL, R_X86_64_PC16, },
223 { BFD_RELOC_8, R_X86_64_8, },
224 { BFD_RELOC_8_PCREL, R_X86_64_PC8, },
225 { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
226 { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
227 { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
228 { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
229 { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
230 { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
231 { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
232 { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
233 { BFD_RELOC_64_PCREL, R_X86_64_PC64, },
234 { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, },
235 { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, },
236 { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, },
237 { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, },
238 { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, },
239 { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, },
240 { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, },
241 { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, },
242 { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, },
243 { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, },
244 { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, },
245 { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
246 { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
249 static reloc_howto_type *
250 elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type)
254 if (r_type == (unsigned int) R_X86_64_32)
259 i = ARRAY_SIZE (x86_64_elf_howto_table) - 1;
261 else if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT
262 || r_type >= (unsigned int) R_X86_64_max)
264 if (r_type >= (unsigned int) R_X86_64_standard)
266 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
268 r_type = R_X86_64_NONE;
273 i = r_type - (unsigned int) R_X86_64_vt_offset;
274 BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type);
275 return &x86_64_elf_howto_table[i];
278 /* Given a BFD reloc type, return a HOWTO structure. */
279 static reloc_howto_type *
280 elf_x86_64_reloc_type_lookup (bfd *abfd,
281 bfd_reloc_code_real_type code)
285 for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map);
288 if (x86_64_reloc_map[i].bfd_reloc_val == code)
289 return elf_x86_64_rtype_to_howto (abfd,
290 x86_64_reloc_map[i].elf_reloc_val);
295 static reloc_howto_type *
296 elf_x86_64_reloc_name_lookup (bfd *abfd,
301 if (!ABI_64_P (abfd) && strcasecmp (r_name, "R_X86_64_32") == 0)
303 /* Get x32 R_X86_64_32. */
304 reloc_howto_type *reloc
305 = &x86_64_elf_howto_table[ARRAY_SIZE (x86_64_elf_howto_table) - 1];
306 BFD_ASSERT (reloc->type == (unsigned int) R_X86_64_32);
310 for (i = 0; i < ARRAY_SIZE (x86_64_elf_howto_table); i++)
311 if (x86_64_elf_howto_table[i].name != NULL
312 && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0)
313 return &x86_64_elf_howto_table[i];
318 /* Given an x86_64 ELF reloc type, fill in an arelent structure. */
321 elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
322 Elf_Internal_Rela *dst)
326 r_type = ELF32_R_TYPE (dst->r_info);
327 cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type);
328 BFD_ASSERT (r_type == cache_ptr->howto->type);
331 /* Support for core dump NOTE sections. */
333 elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
338 switch (note->descsz)
343 case 296: /* sizeof(istruct elf_prstatus) on Linux/x32 */
345 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
348 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
356 case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */
358 elf_tdata (abfd)->core_signal
359 = bfd_get_16 (abfd, note->descdata + 12);
362 elf_tdata (abfd)->core_lwpid
363 = bfd_get_32 (abfd, note->descdata + 32);
372 /* Make a ".reg/999" section. */
373 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
374 size, note->descpos + offset);
378 elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
380 switch (note->descsz)
385 case 124: /* sizeof(struct elf_prpsinfo) on Linux/x32 */
386 elf_tdata (abfd)->core_pid
387 = bfd_get_32 (abfd, note->descdata + 12);
388 elf_tdata (abfd)->core_program
389 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
390 elf_tdata (abfd)->core_command
391 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
394 case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */
395 elf_tdata (abfd)->core_pid
396 = bfd_get_32 (abfd, note->descdata + 24);
397 elf_tdata (abfd)->core_program
398 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
399 elf_tdata (abfd)->core_command
400 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
403 /* Note that for some reason, a spurious space is tacked
404 onto the end of the args in some (at least one anyway)
405 implementations, so strip it off if it exists. */
408 char *command = elf_tdata (abfd)->core_command;
409 int n = strlen (command);
411 if (0 < n && command[n - 1] == ' ')
412 command[n - 1] = '\0';
420 elf_x86_64_write_core_note (bfd *abfd, char *buf, int *bufsiz,
423 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
425 const char *fname, *psargs;
436 va_start (ap, note_type);
437 fname = va_arg (ap, const char *);
438 psargs = va_arg (ap, const char *);
441 if (bed->s->elfclass == ELFCLASS32)
444 memset (&data, 0, sizeof (data));
445 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
446 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
447 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
448 &data, sizeof (data));
453 memset (&data, 0, sizeof (data));
454 strncpy (data.pr_fname, fname, sizeof (data.pr_fname));
455 strncpy (data.pr_psargs, psargs, sizeof (data.pr_psargs));
456 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
457 &data, sizeof (data));
462 va_start (ap, note_type);
463 pid = va_arg (ap, long);
464 cursig = va_arg (ap, int);
465 gregs = va_arg (ap, const void *);
468 if (bed->s->elfclass == ELFCLASS32)
470 if (bed->elf_machine_code == EM_X86_64)
472 prstatusx32_t prstat;
473 memset (&prstat, 0, sizeof (prstat));
475 prstat.pr_cursig = cursig;
476 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
477 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
478 &prstat, sizeof (prstat));
483 memset (&prstat, 0, sizeof (prstat));
485 prstat.pr_cursig = cursig;
486 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
487 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
488 &prstat, sizeof (prstat));
494 memset (&prstat, 0, sizeof (prstat));
496 prstat.pr_cursig = cursig;
497 memcpy (&prstat.pr_reg, gregs, sizeof (prstat.pr_reg));
498 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
499 &prstat, sizeof (prstat));
506 /* Functions for the x86-64 ELF linker. */
508 /* The name of the dynamic interpreter. This is put in the .interp
511 #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
512 #define ELF32_DYNAMIC_INTERPRETER "/lib/ldx32.so.1"
514 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
515 copying dynamic variables from a shared lib into an app's dynbss
516 section, and instead use a dynamic relocation to point into the
518 #define ELIMINATE_COPY_RELOCS 1
520 /* The size in bytes of an entry in the global offset table. */
522 #define GOT_ENTRY_SIZE 8
524 /* The size in bytes of an entry in the procedure linkage table. */
526 #define PLT_ENTRY_SIZE 16
528 /* The first entry in a procedure linkage table looks like this. See the
529 SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */
531 static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] =
533 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
534 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */
535 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
538 /* Subsequent entries in a procedure linkage table look like this. */
540 static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] =
542 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */
543 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */
544 0x68, /* pushq immediate */
545 0, 0, 0, 0, /* replaced with index into relocation table. */
546 0xe9, /* jmp relative */
547 0, 0, 0, 0 /* replaced with offset to start of .plt0. */
550 /* .eh_frame covering the .plt section. */
552 static const bfd_byte elf_x86_64_eh_frame_plt[] =
554 #define PLT_CIE_LENGTH 20
555 #define PLT_FDE_LENGTH 36
556 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
557 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
558 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
559 0, 0, 0, 0, /* CIE ID */
561 'z', 'R', 0, /* Augmentation string */
562 1, /* Code alignment factor */
563 0x78, /* Data alignment factor */
564 16, /* Return address column */
565 1, /* Augmentation size */
566 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
567 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
568 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
569 DW_CFA_nop, DW_CFA_nop,
571 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
572 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
573 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
574 0, 0, 0, 0, /* .plt size goes here */
575 0, /* Augmentation size */
576 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
577 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
578 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
579 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
580 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
581 11, /* Block length */
582 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
583 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
584 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
585 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
586 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
589 /* Architecture-specific backend data for x86-64. */
591 struct elf_x86_64_backend_data
593 /* Templates for the initial PLT entry and for subsequent entries. */
594 const bfd_byte *plt0_entry;
595 const bfd_byte *plt_entry;
596 unsigned int plt_entry_size; /* Size of each PLT entry. */
598 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
599 unsigned int plt0_got1_offset;
600 unsigned int plt0_got2_offset;
602 /* Offset of the end of the PC-relative instruction containing
604 unsigned int plt0_got2_insn_end;
606 /* Offsets into plt_entry that are to be replaced with... */
607 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
608 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
609 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
611 /* Length of the PC-relative instruction containing plt_got_offset. */
612 unsigned int plt_got_insn_size;
614 /* Offset of the end of the PC-relative jump to plt0_entry. */
615 unsigned int plt_plt_insn_end;
617 /* Offset into plt_entry where the initial value of the GOT entry points. */
618 unsigned int plt_lazy_offset;
620 /* .eh_frame covering the .plt section. */
621 const bfd_byte *eh_frame_plt;
622 unsigned int eh_frame_plt_size;
625 #define get_elf_x86_64_backend_data(abfd) \
626 ((const struct elf_x86_64_backend_data *) \
627 get_elf_backend_data (abfd)->arch_data)
629 #define GET_PLT_ENTRY_SIZE(abfd) \
630 get_elf_x86_64_backend_data (abfd)->plt_entry_size
632 /* These are the standard parameters. */
633 static const struct elf_x86_64_backend_data elf_x86_64_arch_bed =
635 elf_x86_64_plt0_entry, /* plt0_entry */
636 elf_x86_64_plt_entry, /* plt_entry */
637 sizeof (elf_x86_64_plt_entry), /* plt_entry_size */
638 2, /* plt0_got1_offset */
639 8, /* plt0_got2_offset */
640 12, /* plt0_got2_insn_end */
641 2, /* plt_got_offset */
642 7, /* plt_reloc_offset */
643 12, /* plt_plt_offset */
644 6, /* plt_got_insn_size */
645 PLT_ENTRY_SIZE, /* plt_plt_insn_end */
646 6, /* plt_lazy_offset */
647 elf_x86_64_eh_frame_plt, /* eh_frame_plt */
648 sizeof (elf_x86_64_eh_frame_plt), /* eh_frame_plt_size */
651 #define elf_backend_arch_data &elf_x86_64_arch_bed
653 /* x86-64 ELF linker hash entry. */
655 struct elf_x86_64_link_hash_entry
657 struct elf_link_hash_entry elf;
659 /* Track dynamic relocs copied for this symbol. */
660 struct elf_dyn_relocs *dyn_relocs;
662 #define GOT_UNKNOWN 0
666 #define GOT_TLS_GDESC 4
667 #define GOT_TLS_GD_BOTH_P(type) \
668 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
669 #define GOT_TLS_GD_P(type) \
670 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
671 #define GOT_TLS_GDESC_P(type) \
672 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
673 #define GOT_TLS_GD_ANY_P(type) \
674 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
675 unsigned char tls_type;
677 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
678 starting at the end of the jump table. */
682 #define elf_x86_64_hash_entry(ent) \
683 ((struct elf_x86_64_link_hash_entry *)(ent))
685 struct elf_x86_64_obj_tdata
687 struct elf_obj_tdata root;
689 /* tls_type for each local got entry. */
690 char *local_got_tls_type;
692 /* GOTPLT entries for TLS descriptors. */
693 bfd_vma *local_tlsdesc_gotent;
696 #define elf_x86_64_tdata(abfd) \
697 ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any)
699 #define elf_x86_64_local_got_tls_type(abfd) \
700 (elf_x86_64_tdata (abfd)->local_got_tls_type)
702 #define elf_x86_64_local_tlsdesc_gotent(abfd) \
703 (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent)
705 #define is_x86_64_elf(bfd) \
706 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
707 && elf_tdata (bfd) != NULL \
708 && elf_object_id (bfd) == X86_64_ELF_DATA)
711 elf_x86_64_mkobject (bfd *abfd)
713 return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata),
717 /* x86-64 ELF linker hash table. */
719 struct elf_x86_64_link_hash_table
721 struct elf_link_hash_table elf;
723 /* Short-cuts to get to dynamic linker sections. */
726 asection *plt_eh_frame;
730 bfd_signed_vma refcount;
734 /* The amount of space used by the jump slots in the GOT. */
735 bfd_vma sgotplt_jump_table_size;
737 /* Small local sym cache. */
738 struct sym_cache sym_cache;
740 bfd_vma (*r_info) (bfd_vma, bfd_vma);
741 bfd_vma (*r_sym) (bfd_vma);
742 unsigned int pointer_r_type;
743 const char *dynamic_interpreter;
744 int dynamic_interpreter_size;
746 /* _TLS_MODULE_BASE_ symbol. */
747 struct bfd_link_hash_entry *tls_module_base;
749 /* Used by local STT_GNU_IFUNC symbols. */
750 htab_t loc_hash_table;
751 void * loc_hash_memory;
753 /* The offset into splt of the PLT entry for the TLS descriptor
754 resolver. Special values are 0, if not necessary (or not found
755 to be necessary yet), and -1 if needed but not determined
758 /* The offset into sgot of the GOT entry used by the PLT entry
762 /* The index of the next R_X86_64_JUMP_SLOT entry in .rela.plt. */
763 bfd_vma next_jump_slot_index;
764 /* The index of the next R_X86_64_IRELATIVE entry in .rela.plt. */
765 bfd_vma next_irelative_index;
768 /* Get the x86-64 ELF linker hash table from a link_info structure. */
770 #define elf_x86_64_hash_table(p) \
771 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
772 == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL)
774 #define elf_x86_64_compute_jump_table_size(htab) \
775 ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE)
777 /* Create an entry in an x86-64 ELF linker hash table. */
779 static struct bfd_hash_entry *
780 elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry,
781 struct bfd_hash_table *table,
784 /* Allocate the structure if it has not already been allocated by a
788 entry = (struct bfd_hash_entry *)
789 bfd_hash_allocate (table,
790 sizeof (struct elf_x86_64_link_hash_entry));
795 /* Call the allocation method of the superclass. */
796 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
799 struct elf_x86_64_link_hash_entry *eh;
801 eh = (struct elf_x86_64_link_hash_entry *) entry;
802 eh->dyn_relocs = NULL;
803 eh->tls_type = GOT_UNKNOWN;
804 eh->tlsdesc_got = (bfd_vma) -1;
810 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
811 for local symbol so that we can handle local STT_GNU_IFUNC symbols
812 as global symbol. We reuse indx and dynstr_index for local symbol
813 hash since they aren't used by global symbols in this backend. */
816 elf_x86_64_local_htab_hash (const void *ptr)
818 struct elf_link_hash_entry *h
819 = (struct elf_link_hash_entry *) ptr;
820 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
823 /* Compare local hash entries. */
826 elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2)
828 struct elf_link_hash_entry *h1
829 = (struct elf_link_hash_entry *) ptr1;
830 struct elf_link_hash_entry *h2
831 = (struct elf_link_hash_entry *) ptr2;
833 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
836 /* Find and/or create a hash entry for local symbol. */
838 static struct elf_link_hash_entry *
839 elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab,
840 bfd *abfd, const Elf_Internal_Rela *rel,
843 struct elf_x86_64_link_hash_entry e, *ret;
844 asection *sec = abfd->sections;
845 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
846 htab->r_sym (rel->r_info));
849 e.elf.indx = sec->id;
850 e.elf.dynstr_index = htab->r_sym (rel->r_info);
851 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
852 create ? INSERT : NO_INSERT);
859 ret = (struct elf_x86_64_link_hash_entry *) *slot;
863 ret = (struct elf_x86_64_link_hash_entry *)
864 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
865 sizeof (struct elf_x86_64_link_hash_entry));
868 memset (ret, 0, sizeof (*ret));
869 ret->elf.indx = sec->id;
870 ret->elf.dynstr_index = htab->r_sym (rel->r_info);
871 ret->elf.dynindx = -1;
877 /* Create an X86-64 ELF linker hash table. */
879 static struct bfd_link_hash_table *
880 elf_x86_64_link_hash_table_create (bfd *abfd)
882 struct elf_x86_64_link_hash_table *ret;
883 bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table);
885 ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt);
889 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
890 elf_x86_64_link_hash_newfunc,
891 sizeof (struct elf_x86_64_link_hash_entry),
900 ret->plt_eh_frame = NULL;
901 ret->sym_cache.abfd = NULL;
902 ret->tlsdesc_plt = 0;
903 ret->tlsdesc_got = 0;
904 ret->tls_ld_got.refcount = 0;
905 ret->sgotplt_jump_table_size = 0;
906 ret->tls_module_base = NULL;
907 ret->next_jump_slot_index = 0;
908 ret->next_irelative_index = 0;
912 ret->r_info = elf64_r_info;
913 ret->r_sym = elf64_r_sym;
914 ret->pointer_r_type = R_X86_64_64;
915 ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER;
916 ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER;
920 ret->r_info = elf32_r_info;
921 ret->r_sym = elf32_r_sym;
922 ret->pointer_r_type = R_X86_64_32;
923 ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER;
924 ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER;
927 ret->loc_hash_table = htab_try_create (1024,
928 elf_x86_64_local_htab_hash,
929 elf_x86_64_local_htab_eq,
931 ret->loc_hash_memory = objalloc_create ();
932 if (!ret->loc_hash_table || !ret->loc_hash_memory)
938 return &ret->elf.root;
941 /* Destroy an X86-64 ELF linker hash table. */
944 elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash)
946 struct elf_x86_64_link_hash_table *htab
947 = (struct elf_x86_64_link_hash_table *) hash;
949 if (htab->loc_hash_table)
950 htab_delete (htab->loc_hash_table);
951 if (htab->loc_hash_memory)
952 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
953 _bfd_generic_link_hash_table_free (hash);
956 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
957 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
961 elf_x86_64_create_dynamic_sections (bfd *dynobj,
962 struct bfd_link_info *info)
964 struct elf_x86_64_link_hash_table *htab;
966 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
969 htab = elf_x86_64_hash_table (info);
973 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
975 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
978 || (!info->shared && !htab->srelbss))
981 if (!info->no_ld_generated_unwind_info
982 && htab->plt_eh_frame == NULL
983 && htab->elf.splt != NULL)
985 const struct elf_x86_64_backend_data *const abed
986 = get_elf_x86_64_backend_data (dynobj);
987 flagword flags = get_elf_backend_data (dynobj)->dynamic_sec_flags;
989 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame",
993 if (htab->plt_eh_frame == NULL
994 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 3))
997 htab->plt_eh_frame->size = abed->eh_frame_plt_size;
998 htab->plt_eh_frame->contents
999 = bfd_alloc (dynobj, htab->plt_eh_frame->size);
1000 memcpy (htab->plt_eh_frame->contents,
1001 abed->eh_frame_plt, abed->eh_frame_plt_size);
1006 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1009 elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info,
1010 struct elf_link_hash_entry *dir,
1011 struct elf_link_hash_entry *ind)
1013 struct elf_x86_64_link_hash_entry *edir, *eind;
1015 edir = (struct elf_x86_64_link_hash_entry *) dir;
1016 eind = (struct elf_x86_64_link_hash_entry *) ind;
1018 if (eind->dyn_relocs != NULL)
1020 if (edir->dyn_relocs != NULL)
1022 struct elf_dyn_relocs **pp;
1023 struct elf_dyn_relocs *p;
1025 /* Add reloc counts against the indirect sym to the direct sym
1026 list. Merge any entries against the same section. */
1027 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1029 struct elf_dyn_relocs *q;
1031 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1032 if (q->sec == p->sec)
1034 q->pc_count += p->pc_count;
1035 q->count += p->count;
1042 *pp = edir->dyn_relocs;
1045 edir->dyn_relocs = eind->dyn_relocs;
1046 eind->dyn_relocs = NULL;
1049 if (ind->root.type == bfd_link_hash_indirect
1050 && dir->got.refcount <= 0)
1052 edir->tls_type = eind->tls_type;
1053 eind->tls_type = GOT_UNKNOWN;
1056 if (ELIMINATE_COPY_RELOCS
1057 && ind->root.type != bfd_link_hash_indirect
1058 && dir->dynamic_adjusted)
1060 /* If called to transfer flags for a weakdef during processing
1061 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1062 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1063 dir->ref_dynamic |= ind->ref_dynamic;
1064 dir->ref_regular |= ind->ref_regular;
1065 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1066 dir->needs_plt |= ind->needs_plt;
1067 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1070 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1074 elf64_x86_64_elf_object_p (bfd *abfd)
1076 /* Set the right machine number for an x86-64 elf64 file. */
1077 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
1082 elf32_x86_64_elf_object_p (bfd *abfd)
1084 /* Set the right machine number for an x86-64 elf32 file. */
1085 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32);
1089 /* Return TRUE if the TLS access code sequence support transition
1093 elf_x86_64_check_tls_transition (bfd *abfd,
1094 struct bfd_link_info *info,
1097 Elf_Internal_Shdr *symtab_hdr,
1098 struct elf_link_hash_entry **sym_hashes,
1099 unsigned int r_type,
1100 const Elf_Internal_Rela *rel,
1101 const Elf_Internal_Rela *relend)
1104 unsigned long r_symndx;
1105 struct elf_link_hash_entry *h;
1107 struct elf_x86_64_link_hash_table *htab;
1109 /* Get the section contents. */
1110 if (contents == NULL)
1112 if (elf_section_data (sec)->this_hdr.contents != NULL)
1113 contents = elf_section_data (sec)->this_hdr.contents;
1116 /* FIXME: How to better handle error condition? */
1117 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1120 /* Cache the section contents for elf_link_input_bfd. */
1121 elf_section_data (sec)->this_hdr.contents = contents;
1125 htab = elf_x86_64_hash_table (info);
1126 offset = rel->r_offset;
1129 case R_X86_64_TLSGD:
1130 case R_X86_64_TLSLD:
1131 if ((rel + 1) >= relend)
1134 if (r_type == R_X86_64_TLSGD)
1136 /* Check transition from GD access model. For 64bit, only
1137 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
1138 .word 0x6666; rex64; call __tls_get_addr
1139 can transit to different access model. For 32bit, only
1140 leaq foo@tlsgd(%rip), %rdi
1141 .word 0x6666; rex64; call __tls_get_addr
1142 can transit to different access model. */
1144 static const unsigned char call[] = { 0x66, 0x66, 0x48, 0xe8 };
1145 static const unsigned char leaq[] = { 0x66, 0x48, 0x8d, 0x3d };
1147 if ((offset + 12) > sec->size
1148 || memcmp (contents + offset + 4, call, 4) != 0)
1151 if (ABI_64_P (abfd))
1154 || memcmp (contents + offset - 4, leaq, 4) != 0)
1160 || memcmp (contents + offset - 3, leaq + 1, 3) != 0)
1166 /* Check transition from LD access model. Only
1167 leaq foo@tlsld(%rip), %rdi;
1169 can transit to different access model. */
1171 static const unsigned char lea[] = { 0x48, 0x8d, 0x3d };
1173 if (offset < 3 || (offset + 9) > sec->size)
1176 if (memcmp (contents + offset - 3, lea, 3) != 0
1177 || 0xe8 != *(contents + offset + 4))
1181 r_symndx = htab->r_sym (rel[1].r_info);
1182 if (r_symndx < symtab_hdr->sh_info)
1185 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1186 /* Use strncmp to check __tls_get_addr since __tls_get_addr
1187 may be versioned. */
1189 && h->root.root.string != NULL
1190 && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32
1191 || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32)
1192 && (strncmp (h->root.root.string,
1193 "__tls_get_addr", 14) == 0));
1195 case R_X86_64_GOTTPOFF:
1196 /* Check transition from IE access model:
1197 mov foo@gottpoff(%rip), %reg
1198 add foo@gottpoff(%rip), %reg
1201 /* Check REX prefix first. */
1202 if (offset >= 3 && (offset + 4) <= sec->size)
1204 val = bfd_get_8 (abfd, contents + offset - 3);
1205 if (val != 0x48 && val != 0x4c)
1207 /* X32 may have 0x44 REX prefix or no REX prefix. */
1208 if (ABI_64_P (abfd))
1214 /* X32 may not have any REX prefix. */
1215 if (ABI_64_P (abfd))
1217 if (offset < 2 || (offset + 3) > sec->size)
1221 val = bfd_get_8 (abfd, contents + offset - 2);
1222 if (val != 0x8b && val != 0x03)
1225 val = bfd_get_8 (abfd, contents + offset - 1);
1226 return (val & 0xc7) == 5;
1228 case R_X86_64_GOTPC32_TLSDESC:
1229 /* Check transition from GDesc access model:
1230 leaq x@tlsdesc(%rip), %rax
1232 Make sure it's a leaq adding rip to a 32-bit offset
1233 into any register, although it's probably almost always
1236 if (offset < 3 || (offset + 4) > sec->size)
1239 val = bfd_get_8 (abfd, contents + offset - 3);
1240 if ((val & 0xfb) != 0x48)
1243 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1246 val = bfd_get_8 (abfd, contents + offset - 1);
1247 return (val & 0xc7) == 0x05;
1249 case R_X86_64_TLSDESC_CALL:
1250 /* Check transition from GDesc access model:
1251 call *x@tlsdesc(%rax)
1253 if (offset + 2 <= sec->size)
1255 /* Make sure that it's a call *x@tlsdesc(%rax). */
1256 static const unsigned char call[] = { 0xff, 0x10 };
1257 return memcmp (contents + offset, call, 2) == 0;
1267 /* Return TRUE if the TLS access transition is OK or no transition
1268 will be performed. Update R_TYPE if there is a transition. */
1271 elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd,
1272 asection *sec, bfd_byte *contents,
1273 Elf_Internal_Shdr *symtab_hdr,
1274 struct elf_link_hash_entry **sym_hashes,
1275 unsigned int *r_type, int tls_type,
1276 const Elf_Internal_Rela *rel,
1277 const Elf_Internal_Rela *relend,
1278 struct elf_link_hash_entry *h,
1279 unsigned long r_symndx)
1281 unsigned int from_type = *r_type;
1282 unsigned int to_type = from_type;
1283 bfd_boolean check = TRUE;
1285 /* Skip TLS transition for functions. */
1287 && (h->type == STT_FUNC
1288 || h->type == STT_GNU_IFUNC))
1293 case R_X86_64_TLSGD:
1294 case R_X86_64_GOTPC32_TLSDESC:
1295 case R_X86_64_TLSDESC_CALL:
1296 case R_X86_64_GOTTPOFF:
1297 if (info->executable)
1300 to_type = R_X86_64_TPOFF32;
1302 to_type = R_X86_64_GOTTPOFF;
1305 /* When we are called from elf_x86_64_relocate_section,
1306 CONTENTS isn't NULL and there may be additional transitions
1307 based on TLS_TYPE. */
1308 if (contents != NULL)
1310 unsigned int new_to_type = to_type;
1312 if (info->executable
1315 && tls_type == GOT_TLS_IE)
1316 new_to_type = R_X86_64_TPOFF32;
1318 if (to_type == R_X86_64_TLSGD
1319 || to_type == R_X86_64_GOTPC32_TLSDESC
1320 || to_type == R_X86_64_TLSDESC_CALL)
1322 if (tls_type == GOT_TLS_IE)
1323 new_to_type = R_X86_64_GOTTPOFF;
1326 /* We checked the transition before when we were called from
1327 elf_x86_64_check_relocs. We only want to check the new
1328 transition which hasn't been checked before. */
1329 check = new_to_type != to_type && from_type == to_type;
1330 to_type = new_to_type;
1335 case R_X86_64_TLSLD:
1336 if (info->executable)
1337 to_type = R_X86_64_TPOFF32;
1344 /* Return TRUE if there is no transition. */
1345 if (from_type == to_type)
1348 /* Check if the transition can be performed. */
1350 && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents,
1351 symtab_hdr, sym_hashes,
1352 from_type, rel, relend))
1354 reloc_howto_type *from, *to;
1357 from = elf_x86_64_rtype_to_howto (abfd, from_type);
1358 to = elf_x86_64_rtype_to_howto (abfd, to_type);
1361 name = h->root.root.string;
1364 struct elf_x86_64_link_hash_table *htab;
1366 htab = elf_x86_64_hash_table (info);
1371 Elf_Internal_Sym *isym;
1373 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1375 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1379 (*_bfd_error_handler)
1380 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1381 "in section `%A' failed"),
1382 abfd, sec, from->name, to->name, name,
1383 (unsigned long) rel->r_offset);
1384 bfd_set_error (bfd_error_bad_value);
1392 /* Look through the relocs for a section during the first phase, and
1393 calculate needed space in the global offset table, procedure
1394 linkage table, and dynamic reloc sections. */
1397 elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info,
1399 const Elf_Internal_Rela *relocs)
1401 struct elf_x86_64_link_hash_table *htab;
1402 Elf_Internal_Shdr *symtab_hdr;
1403 struct elf_link_hash_entry **sym_hashes;
1404 const Elf_Internal_Rela *rel;
1405 const Elf_Internal_Rela *rel_end;
1408 if (info->relocatable)
1411 BFD_ASSERT (is_x86_64_elf (abfd));
1413 htab = elf_x86_64_hash_table (info);
1417 symtab_hdr = &elf_symtab_hdr (abfd);
1418 sym_hashes = elf_sym_hashes (abfd);
1422 rel_end = relocs + sec->reloc_count;
1423 for (rel = relocs; rel < rel_end; rel++)
1425 unsigned int r_type;
1426 unsigned long r_symndx;
1427 struct elf_link_hash_entry *h;
1428 Elf_Internal_Sym *isym;
1431 r_symndx = htab->r_sym (rel->r_info);
1432 r_type = ELF32_R_TYPE (rel->r_info);
1434 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1436 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1441 if (r_symndx < symtab_hdr->sh_info)
1443 /* A local symbol. */
1444 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1449 /* Check relocation against local STT_GNU_IFUNC symbol. */
1450 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1452 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel,
1457 /* Fake a STT_GNU_IFUNC symbol. */
1458 h->type = STT_GNU_IFUNC;
1461 h->forced_local = 1;
1462 h->root.type = bfd_link_hash_defined;
1470 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1471 while (h->root.type == bfd_link_hash_indirect
1472 || h->root.type == bfd_link_hash_warning)
1473 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1476 /* Check invalid x32 relocations. */
1477 if (!ABI_64_P (abfd))
1483 case R_X86_64_DTPOFF64:
1484 case R_X86_64_TPOFF64:
1486 case R_X86_64_GOTOFF64:
1487 case R_X86_64_GOT64:
1488 case R_X86_64_GOTPCREL64:
1489 case R_X86_64_GOTPC64:
1490 case R_X86_64_GOTPLT64:
1491 case R_X86_64_PLTOFF64:
1494 name = h->root.root.string;
1496 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1498 (*_bfd_error_handler)
1499 (_("%B: relocation %s against symbol `%s' isn't "
1500 "supported in x32 mode"), abfd,
1501 x86_64_elf_howto_table[r_type].name, name);
1502 bfd_set_error (bfd_error_bad_value);
1510 /* Create the ifunc sections for static executables. If we
1511 never see an indirect function symbol nor we are building
1512 a static executable, those sections will be empty and
1513 won't appear in output. */
1524 case R_X86_64_PLT32:
1525 case R_X86_64_GOTPCREL:
1526 case R_X86_64_GOTPCREL64:
1527 if (htab->elf.dynobj == NULL)
1528 htab->elf.dynobj = abfd;
1529 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1534 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1535 it here if it is defined in a non-shared object. */
1536 if (h->type == STT_GNU_IFUNC
1539 /* It is referenced by a non-shared object. */
1543 /* STT_GNU_IFUNC symbol must go through PLT. */
1544 h->plt.refcount += 1;
1546 /* STT_GNU_IFUNC needs dynamic sections. */
1547 if (htab->elf.dynobj == NULL)
1548 htab->elf.dynobj = abfd;
1553 if (h->root.root.string)
1554 name = h->root.root.string;
1556 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1558 (*_bfd_error_handler)
1559 (_("%B: relocation %s against STT_GNU_IFUNC "
1560 "symbol `%s' isn't handled by %s"), abfd,
1561 x86_64_elf_howto_table[r_type].name,
1562 name, __FUNCTION__);
1563 bfd_set_error (bfd_error_bad_value);
1567 if (ABI_64_P (abfd))
1571 h->pointer_equality_needed = 1;
1574 /* We must copy these reloc types into the output
1575 file. Create a reloc section in dynobj and
1576 make room for this reloc. */
1577 sreloc = _bfd_elf_create_ifunc_dyn_reloc
1578 (abfd, info, sec, sreloc,
1579 &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs);
1590 if (r_type != R_X86_64_PC32
1591 && r_type != R_X86_64_PC64)
1592 h->pointer_equality_needed = 1;
1595 case R_X86_64_PLT32:
1598 case R_X86_64_GOTPCREL:
1599 case R_X86_64_GOTPCREL64:
1600 h->got.refcount += 1;
1601 if (htab->elf.sgot == NULL
1602 && !_bfd_elf_create_got_section (htab->elf.dynobj,
1612 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
1613 symtab_hdr, sym_hashes,
1614 &r_type, GOT_UNKNOWN,
1615 rel, rel_end, h, r_symndx))
1620 case R_X86_64_TLSLD:
1621 htab->tls_ld_got.refcount += 1;
1624 case R_X86_64_TPOFF32:
1625 if (!info->executable && ABI_64_P (abfd))
1628 name = h->root.root.string;
1630 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1632 (*_bfd_error_handler)
1633 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1635 x86_64_elf_howto_table[r_type].name, name);
1636 bfd_set_error (bfd_error_bad_value);
1641 case R_X86_64_GOTTPOFF:
1642 if (!info->executable)
1643 info->flags |= DF_STATIC_TLS;
1646 case R_X86_64_GOT32:
1647 case R_X86_64_GOTPCREL:
1648 case R_X86_64_TLSGD:
1649 case R_X86_64_GOT64:
1650 case R_X86_64_GOTPCREL64:
1651 case R_X86_64_GOTPLT64:
1652 case R_X86_64_GOTPC32_TLSDESC:
1653 case R_X86_64_TLSDESC_CALL:
1654 /* This symbol requires a global offset table entry. */
1656 int tls_type, old_tls_type;
1660 default: tls_type = GOT_NORMAL; break;
1661 case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
1662 case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
1663 case R_X86_64_GOTPC32_TLSDESC:
1664 case R_X86_64_TLSDESC_CALL:
1665 tls_type = GOT_TLS_GDESC; break;
1670 if (r_type == R_X86_64_GOTPLT64)
1672 /* This relocation indicates that we also need
1673 a PLT entry, as this is a function. We don't need
1674 a PLT entry for local symbols. */
1676 h->plt.refcount += 1;
1678 h->got.refcount += 1;
1679 old_tls_type = elf_x86_64_hash_entry (h)->tls_type;
1683 bfd_signed_vma *local_got_refcounts;
1685 /* This is a global offset table entry for a local symbol. */
1686 local_got_refcounts = elf_local_got_refcounts (abfd);
1687 if (local_got_refcounts == NULL)
1691 size = symtab_hdr->sh_info;
1692 size *= sizeof (bfd_signed_vma)
1693 + sizeof (bfd_vma) + sizeof (char);
1694 local_got_refcounts = ((bfd_signed_vma *)
1695 bfd_zalloc (abfd, size));
1696 if (local_got_refcounts == NULL)
1698 elf_local_got_refcounts (abfd) = local_got_refcounts;
1699 elf_x86_64_local_tlsdesc_gotent (abfd)
1700 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1701 elf_x86_64_local_got_tls_type (abfd)
1702 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1704 local_got_refcounts[r_symndx] += 1;
1706 = elf_x86_64_local_got_tls_type (abfd) [r_symndx];
1709 /* If a TLS symbol is accessed using IE at least once,
1710 there is no point to use dynamic model for it. */
1711 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1712 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1713 || tls_type != GOT_TLS_IE))
1715 if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type))
1716 tls_type = old_tls_type;
1717 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1718 && GOT_TLS_GD_ANY_P (tls_type))
1719 tls_type |= old_tls_type;
1723 name = h->root.root.string;
1725 name = bfd_elf_sym_name (abfd, symtab_hdr,
1727 (*_bfd_error_handler)
1728 (_("%B: '%s' accessed both as normal and thread local symbol"),
1734 if (old_tls_type != tls_type)
1737 elf_x86_64_hash_entry (h)->tls_type = tls_type;
1739 elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
1744 case R_X86_64_GOTOFF64:
1745 case R_X86_64_GOTPC32:
1746 case R_X86_64_GOTPC64:
1748 if (htab->elf.sgot == NULL)
1750 if (htab->elf.dynobj == NULL)
1751 htab->elf.dynobj = abfd;
1752 if (!_bfd_elf_create_got_section (htab->elf.dynobj,
1758 case R_X86_64_PLT32:
1759 /* This symbol requires a procedure linkage table entry. We
1760 actually build the entry in adjust_dynamic_symbol,
1761 because this might be a case of linking PIC code which is
1762 never referenced by a dynamic object, in which case we
1763 don't need to generate a procedure linkage table entry
1766 /* If this is a local symbol, we resolve it directly without
1767 creating a procedure linkage table entry. */
1772 h->plt.refcount += 1;
1775 case R_X86_64_PLTOFF64:
1776 /* This tries to form the 'address' of a function relative
1777 to GOT. For global symbols we need a PLT entry. */
1781 h->plt.refcount += 1;
1786 if (!ABI_64_P (abfd))
1791 /* Let's help debug shared library creation. These relocs
1792 cannot be used in shared libs. Don't error out for
1793 sections we don't care about, such as debug sections or
1794 non-constant sections. */
1796 && (sec->flags & SEC_ALLOC) != 0
1797 && (sec->flags & SEC_READONLY) != 0)
1800 name = h->root.root.string;
1802 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1803 (*_bfd_error_handler)
1804 (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"),
1805 abfd, x86_64_elf_howto_table[r_type].name, name);
1806 bfd_set_error (bfd_error_bad_value);
1817 if (h != NULL && info->executable)
1819 /* If this reloc is in a read-only section, we might
1820 need a copy reloc. We can't check reliably at this
1821 stage whether the section is read-only, as input
1822 sections have not yet been mapped to output sections.
1823 Tentatively set the flag for now, and correct in
1824 adjust_dynamic_symbol. */
1827 /* We may need a .plt entry if the function this reloc
1828 refers to is in a shared lib. */
1829 h->plt.refcount += 1;
1830 if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64)
1831 h->pointer_equality_needed = 1;
1834 /* If we are creating a shared library, and this is a reloc
1835 against a global symbol, or a non PC relative reloc
1836 against a local symbol, then we need to copy the reloc
1837 into the shared library. However, if we are linking with
1838 -Bsymbolic, we do not need to copy a reloc against a
1839 global symbol which is defined in an object we are
1840 including in the link (i.e., DEF_REGULAR is set). At
1841 this point we have not seen all the input files, so it is
1842 possible that DEF_REGULAR is not set now but will be set
1843 later (it is never cleared). In case of a weak definition,
1844 DEF_REGULAR may be cleared later by a strong definition in
1845 a shared library. We account for that possibility below by
1846 storing information in the relocs_copied field of the hash
1847 table entry. A similar situation occurs when creating
1848 shared libraries and symbol visibility changes render the
1851 If on the other hand, we are creating an executable, we
1852 may need to keep relocations for symbols satisfied by a
1853 dynamic library if we manage to avoid copy relocs for the
1856 && (sec->flags & SEC_ALLOC) != 0
1857 && (! IS_X86_64_PCREL_TYPE (r_type)
1859 && (! SYMBOLIC_BIND (info, h)
1860 || h->root.type == bfd_link_hash_defweak
1861 || !h->def_regular))))
1862 || (ELIMINATE_COPY_RELOCS
1864 && (sec->flags & SEC_ALLOC) != 0
1866 && (h->root.type == bfd_link_hash_defweak
1867 || !h->def_regular)))
1869 struct elf_dyn_relocs *p;
1870 struct elf_dyn_relocs **head;
1872 /* We must copy these reloc types into the output file.
1873 Create a reloc section in dynobj and make room for
1877 if (htab->elf.dynobj == NULL)
1878 htab->elf.dynobj = abfd;
1880 sreloc = _bfd_elf_make_dynamic_reloc_section
1881 (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2,
1882 abfd, /*rela?*/ TRUE);
1888 /* If this is a global symbol, we count the number of
1889 relocations we need for this symbol. */
1892 head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs;
1896 /* Track dynamic relocs needed for local syms too.
1897 We really need local syms available to do this
1902 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1907 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1911 /* Beware of type punned pointers vs strict aliasing
1913 vpp = &(elf_section_data (s)->local_dynrel);
1914 head = (struct elf_dyn_relocs **)vpp;
1918 if (p == NULL || p->sec != sec)
1920 bfd_size_type amt = sizeof *p;
1922 p = ((struct elf_dyn_relocs *)
1923 bfd_alloc (htab->elf.dynobj, amt));
1934 if (IS_X86_64_PCREL_TYPE (r_type))
1939 /* This relocation describes the C++ object vtable hierarchy.
1940 Reconstruct it for later use during GC. */
1941 case R_X86_64_GNU_VTINHERIT:
1942 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1946 /* This relocation describes which C++ vtable entries are actually
1947 used. Record for later use during GC. */
1948 case R_X86_64_GNU_VTENTRY:
1949 BFD_ASSERT (h != NULL);
1951 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1963 /* Return the section that should be marked against GC for a given
1967 elf_x86_64_gc_mark_hook (asection *sec,
1968 struct bfd_link_info *info,
1969 Elf_Internal_Rela *rel,
1970 struct elf_link_hash_entry *h,
1971 Elf_Internal_Sym *sym)
1974 switch (ELF32_R_TYPE (rel->r_info))
1976 case R_X86_64_GNU_VTINHERIT:
1977 case R_X86_64_GNU_VTENTRY:
1981 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1984 /* Update the got entry reference counts for the section being removed. */
1987 elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info,
1989 const Elf_Internal_Rela *relocs)
1991 struct elf_x86_64_link_hash_table *htab;
1992 Elf_Internal_Shdr *symtab_hdr;
1993 struct elf_link_hash_entry **sym_hashes;
1994 bfd_signed_vma *local_got_refcounts;
1995 const Elf_Internal_Rela *rel, *relend;
1997 if (info->relocatable)
2000 htab = elf_x86_64_hash_table (info);
2004 elf_section_data (sec)->local_dynrel = NULL;
2006 symtab_hdr = &elf_symtab_hdr (abfd);
2007 sym_hashes = elf_sym_hashes (abfd);
2008 local_got_refcounts = elf_local_got_refcounts (abfd);
2010 htab = elf_x86_64_hash_table (info);
2011 relend = relocs + sec->reloc_count;
2012 for (rel = relocs; rel < relend; rel++)
2014 unsigned long r_symndx;
2015 unsigned int r_type;
2016 struct elf_link_hash_entry *h = NULL;
2018 r_symndx = htab->r_sym (rel->r_info);
2019 if (r_symndx >= symtab_hdr->sh_info)
2021 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2022 while (h->root.type == bfd_link_hash_indirect
2023 || h->root.type == bfd_link_hash_warning)
2024 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2028 /* A local symbol. */
2029 Elf_Internal_Sym *isym;
2031 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2034 /* Check relocation against local STT_GNU_IFUNC symbol. */
2036 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2038 h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE);
2046 struct elf_x86_64_link_hash_entry *eh;
2047 struct elf_dyn_relocs **pp;
2048 struct elf_dyn_relocs *p;
2050 eh = (struct elf_x86_64_link_hash_entry *) h;
2052 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2055 /* Everything must go for SEC. */
2061 r_type = ELF32_R_TYPE (rel->r_info);
2062 if (! elf_x86_64_tls_transition (info, abfd, sec, NULL,
2063 symtab_hdr, sym_hashes,
2064 &r_type, GOT_UNKNOWN,
2065 rel, relend, h, r_symndx))
2070 case R_X86_64_TLSLD:
2071 if (htab->tls_ld_got.refcount > 0)
2072 htab->tls_ld_got.refcount -= 1;
2075 case R_X86_64_TLSGD:
2076 case R_X86_64_GOTPC32_TLSDESC:
2077 case R_X86_64_TLSDESC_CALL:
2078 case R_X86_64_GOTTPOFF:
2079 case R_X86_64_GOT32:
2080 case R_X86_64_GOTPCREL:
2081 case R_X86_64_GOT64:
2082 case R_X86_64_GOTPCREL64:
2083 case R_X86_64_GOTPLT64:
2086 if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0)
2087 h->plt.refcount -= 1;
2088 if (h->got.refcount > 0)
2089 h->got.refcount -= 1;
2090 if (h->type == STT_GNU_IFUNC)
2092 if (h->plt.refcount > 0)
2093 h->plt.refcount -= 1;
2096 else if (local_got_refcounts != NULL)
2098 if (local_got_refcounts[r_symndx] > 0)
2099 local_got_refcounts[r_symndx] -= 1;
2113 && (h == NULL || h->type != STT_GNU_IFUNC))
2117 case R_X86_64_PLT32:
2118 case R_X86_64_PLTOFF64:
2121 if (h->plt.refcount > 0)
2122 h->plt.refcount -= 1;
2134 /* Adjust a symbol defined by a dynamic object and referenced by a
2135 regular object. The current definition is in some section of the
2136 dynamic object, but we're not including those sections. We have to
2137 change the definition to something the rest of the link can
2141 elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info,
2142 struct elf_link_hash_entry *h)
2144 struct elf_x86_64_link_hash_table *htab;
2147 /* STT_GNU_IFUNC symbol must go through PLT. */
2148 if (h->type == STT_GNU_IFUNC)
2150 if (h->plt.refcount <= 0)
2152 h->plt.offset = (bfd_vma) -1;
2158 /* If this is a function, put it in the procedure linkage table. We
2159 will fill in the contents of the procedure linkage table later,
2160 when we know the address of the .got section. */
2161 if (h->type == STT_FUNC
2164 if (h->plt.refcount <= 0
2165 || SYMBOL_CALLS_LOCAL (info, h)
2166 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2167 && h->root.type == bfd_link_hash_undefweak))
2169 /* This case can occur if we saw a PLT32 reloc in an input
2170 file, but the symbol was never referred to by a dynamic
2171 object, or if all references were garbage collected. In
2172 such a case, we don't actually need to build a procedure
2173 linkage table, and we can just do a PC32 reloc instead. */
2174 h->plt.offset = (bfd_vma) -1;
2181 /* It's possible that we incorrectly decided a .plt reloc was
2182 needed for an R_X86_64_PC32 reloc to a non-function sym in
2183 check_relocs. We can't decide accurately between function and
2184 non-function syms in check-relocs; Objects loaded later in
2185 the link may change h->type. So fix it now. */
2186 h->plt.offset = (bfd_vma) -1;
2188 /* If this is a weak symbol, and there is a real definition, the
2189 processor independent code will have arranged for us to see the
2190 real definition first, and we can just use the same value. */
2191 if (h->u.weakdef != NULL)
2193 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2194 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2195 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2196 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2197 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2198 h->non_got_ref = h->u.weakdef->non_got_ref;
2202 /* This is a reference to a symbol defined by a dynamic object which
2203 is not a function. */
2205 /* If we are creating a shared library, we must presume that the
2206 only references to the symbol are via the global offset table.
2207 For such cases we need not do anything here; the relocations will
2208 be handled correctly by relocate_section. */
2212 /* If there are no references to this symbol that do not use the
2213 GOT, we don't need to generate a copy reloc. */
2214 if (!h->non_got_ref)
2217 /* If -z nocopyreloc was given, we won't generate them either. */
2218 if (info->nocopyreloc)
2224 if (ELIMINATE_COPY_RELOCS)
2226 struct elf_x86_64_link_hash_entry * eh;
2227 struct elf_dyn_relocs *p;
2229 eh = (struct elf_x86_64_link_hash_entry *) h;
2230 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2232 s = p->sec->output_section;
2233 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2237 /* If we didn't find any dynamic relocs in read-only sections, then
2238 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
2246 /* We must allocate the symbol in our .dynbss section, which will
2247 become part of the .bss section of the executable. There will be
2248 an entry for this symbol in the .dynsym section. The dynamic
2249 object will contain position independent code, so all references
2250 from the dynamic object to this symbol will go through the global
2251 offset table. The dynamic linker will use the .dynsym entry to
2252 determine the address it must put in the global offset table, so
2253 both the dynamic object and the regular object will refer to the
2254 same memory location for the variable. */
2256 htab = elf_x86_64_hash_table (info);
2260 /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker
2261 to copy the initial value out of the dynamic object and into the
2262 runtime process image. */
2263 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2265 const struct elf_backend_data *bed;
2266 bed = get_elf_backend_data (info->output_bfd);
2267 htab->srelbss->size += bed->s->sizeof_rela;
2273 return _bfd_elf_adjust_dynamic_copy (h, s);
2276 /* Allocate space in .plt, .got and associated reloc sections for
2280 elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
2282 struct bfd_link_info *info;
2283 struct elf_x86_64_link_hash_table *htab;
2284 struct elf_x86_64_link_hash_entry *eh;
2285 struct elf_dyn_relocs *p;
2286 const struct elf_backend_data *bed;
2287 unsigned int plt_entry_size;
2289 if (h->root.type == bfd_link_hash_indirect)
2292 eh = (struct elf_x86_64_link_hash_entry *) h;
2294 info = (struct bfd_link_info *) inf;
2295 htab = elf_x86_64_hash_table (info);
2298 bed = get_elf_backend_data (info->output_bfd);
2299 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2301 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2302 here if it is defined and referenced in a non-shared object. */
2303 if (h->type == STT_GNU_IFUNC
2305 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2309 else if (htab->elf.dynamic_sections_created
2310 && h->plt.refcount > 0)
2312 /* Make sure this symbol is output as a dynamic symbol.
2313 Undefined weak syms won't yet be marked as dynamic. */
2314 if (h->dynindx == -1
2315 && !h->forced_local)
2317 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2322 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2324 asection *s = htab->elf.splt;
2326 /* If this is the first .plt entry, make room for the special
2329 s->size += plt_entry_size;
2331 h->plt.offset = s->size;
2333 /* If this symbol is not defined in a regular file, and we are
2334 not generating a shared library, then set the symbol to this
2335 location in the .plt. This is required to make function
2336 pointers compare as equal between the normal executable and
2337 the shared library. */
2341 h->root.u.def.section = s;
2342 h->root.u.def.value = h->plt.offset;
2345 /* Make room for this entry. */
2346 s->size += plt_entry_size;
2348 /* We also need to make an entry in the .got.plt section, which
2349 will be placed in the .got section by the linker script. */
2350 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
2352 /* We also need to make an entry in the .rela.plt section. */
2353 htab->elf.srelplt->size += bed->s->sizeof_rela;
2354 htab->elf.srelplt->reloc_count++;
2358 h->plt.offset = (bfd_vma) -1;
2364 h->plt.offset = (bfd_vma) -1;
2368 eh->tlsdesc_got = (bfd_vma) -1;
2370 /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
2371 make it a R_X86_64_TPOFF32 requiring no GOT entry. */
2372 if (h->got.refcount > 0
2375 && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
2377 h->got.offset = (bfd_vma) -1;
2379 else if (h->got.refcount > 0)
2383 int tls_type = elf_x86_64_hash_entry (h)->tls_type;
2385 /* Make sure this symbol is output as a dynamic symbol.
2386 Undefined weak syms won't yet be marked as dynamic. */
2387 if (h->dynindx == -1
2388 && !h->forced_local)
2390 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2394 if (GOT_TLS_GDESC_P (tls_type))
2396 eh->tlsdesc_got = htab->elf.sgotplt->size
2397 - elf_x86_64_compute_jump_table_size (htab);
2398 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
2399 h->got.offset = (bfd_vma) -2;
2401 if (! GOT_TLS_GDESC_P (tls_type)
2402 || GOT_TLS_GD_P (tls_type))
2405 h->got.offset = s->size;
2406 s->size += GOT_ENTRY_SIZE;
2407 if (GOT_TLS_GD_P (tls_type))
2408 s->size += GOT_ENTRY_SIZE;
2410 dyn = htab->elf.dynamic_sections_created;
2411 /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
2413 R_X86_64_GOTTPOFF needs one dynamic relocation. */
2414 if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2415 || tls_type == GOT_TLS_IE)
2416 htab->elf.srelgot->size += bed->s->sizeof_rela;
2417 else if (GOT_TLS_GD_P (tls_type))
2418 htab->elf.srelgot->size += 2 * bed->s->sizeof_rela;
2419 else if (! GOT_TLS_GDESC_P (tls_type)
2420 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2421 || h->root.type != bfd_link_hash_undefweak)
2423 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2424 htab->elf.srelgot->size += bed->s->sizeof_rela;
2425 if (GOT_TLS_GDESC_P (tls_type))
2427 htab->elf.srelplt->size += bed->s->sizeof_rela;
2428 htab->tlsdesc_plt = (bfd_vma) -1;
2432 h->got.offset = (bfd_vma) -1;
2434 if (eh->dyn_relocs == NULL)
2437 /* In the shared -Bsymbolic case, discard space allocated for
2438 dynamic pc-relative relocs against symbols which turn out to be
2439 defined in regular objects. For the normal shared case, discard
2440 space for pc-relative relocs that have become local due to symbol
2441 visibility changes. */
2445 /* Relocs that use pc_count are those that appear on a call
2446 insn, or certain REL relocs that can generated via assembly.
2447 We want calls to protected symbols to resolve directly to the
2448 function rather than going via the plt. If people want
2449 function pointer comparisons to work as expected then they
2450 should avoid writing weird assembly. */
2451 if (SYMBOL_CALLS_LOCAL (info, h))
2453 struct elf_dyn_relocs **pp;
2455 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2457 p->count -= p->pc_count;
2466 /* Also discard relocs on undefined weak syms with non-default
2468 if (eh->dyn_relocs != NULL
2469 && h->root.type == bfd_link_hash_undefweak)
2471 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2472 eh->dyn_relocs = NULL;
2474 /* Make sure undefined weak symbols are output as a dynamic
2476 else if (h->dynindx == -1
2477 && ! h->forced_local
2478 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2483 else if (ELIMINATE_COPY_RELOCS)
2485 /* For the non-shared case, discard space for relocs against
2486 symbols which turn out to need copy relocs or are not
2492 || (htab->elf.dynamic_sections_created
2493 && (h->root.type == bfd_link_hash_undefweak
2494 || h->root.type == bfd_link_hash_undefined))))
2496 /* Make sure this symbol is output as a dynamic symbol.
2497 Undefined weak syms won't yet be marked as dynamic. */
2498 if (h->dynindx == -1
2499 && ! h->forced_local
2500 && ! bfd_elf_link_record_dynamic_symbol (info, h))
2503 /* If that succeeded, we know we'll be keeping all the
2505 if (h->dynindx != -1)
2509 eh->dyn_relocs = NULL;
2514 /* Finally, allocate space. */
2515 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2519 sreloc = elf_section_data (p->sec)->sreloc;
2521 BFD_ASSERT (sreloc != NULL);
2523 sreloc->size += p->count * bed->s->sizeof_rela;
2529 /* Allocate space in .plt, .got and associated reloc sections for
2530 local dynamic relocs. */
2533 elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf)
2535 struct elf_link_hash_entry *h
2536 = (struct elf_link_hash_entry *) *slot;
2538 if (h->type != STT_GNU_IFUNC
2542 || h->root.type != bfd_link_hash_defined)
2545 return elf_x86_64_allocate_dynrelocs (h, inf);
2548 /* Find any dynamic relocs that apply to read-only sections. */
2551 elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h,
2554 struct elf_x86_64_link_hash_entry *eh;
2555 struct elf_dyn_relocs *p;
2557 /* Skip local IFUNC symbols. */
2558 if (h->forced_local && h->type == STT_GNU_IFUNC)
2561 eh = (struct elf_x86_64_link_hash_entry *) h;
2562 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2564 asection *s = p->sec->output_section;
2566 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2568 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2570 info->flags |= DF_TEXTREL;
2572 if (info->warn_shared_textrel && info->shared)
2573 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2574 p->sec->owner, h->root.root.string,
2577 /* Not an error, just cut short the traversal. */
2584 /* Set the sizes of the dynamic sections. */
2587 elf_x86_64_size_dynamic_sections (bfd *output_bfd,
2588 struct bfd_link_info *info)
2590 struct elf_x86_64_link_hash_table *htab;
2595 const struct elf_backend_data *bed;
2597 htab = elf_x86_64_hash_table (info);
2600 bed = get_elf_backend_data (output_bfd);
2602 dynobj = htab->elf.dynobj;
2606 if (htab->elf.dynamic_sections_created)
2608 /* Set the contents of the .interp section to the interpreter. */
2609 if (info->executable)
2611 s = bfd_get_section_by_name (dynobj, ".interp");
2614 s->size = htab->dynamic_interpreter_size;
2615 s->contents = (unsigned char *) htab->dynamic_interpreter;
2619 /* Set up .got offsets for local syms, and space for local dynamic
2621 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2623 bfd_signed_vma *local_got;
2624 bfd_signed_vma *end_local_got;
2625 char *local_tls_type;
2626 bfd_vma *local_tlsdesc_gotent;
2627 bfd_size_type locsymcount;
2628 Elf_Internal_Shdr *symtab_hdr;
2631 if (! is_x86_64_elf (ibfd))
2634 for (s = ibfd->sections; s != NULL; s = s->next)
2636 struct elf_dyn_relocs *p;
2638 for (p = (struct elf_dyn_relocs *)
2639 (elf_section_data (s)->local_dynrel);
2643 if (!bfd_is_abs_section (p->sec)
2644 && bfd_is_abs_section (p->sec->output_section))
2646 /* Input section has been discarded, either because
2647 it is a copy of a linkonce section or due to
2648 linker script /DISCARD/, so we'll be discarding
2651 else if (p->count != 0)
2653 srel = elf_section_data (p->sec)->sreloc;
2654 srel->size += p->count * bed->s->sizeof_rela;
2655 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2656 && (info->flags & DF_TEXTREL) == 0)
2658 info->flags |= DF_TEXTREL;
2659 if (info->warn_shared_textrel && info->shared)
2660 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2661 p->sec->owner, p->sec);
2667 local_got = elf_local_got_refcounts (ibfd);
2671 symtab_hdr = &elf_symtab_hdr (ibfd);
2672 locsymcount = symtab_hdr->sh_info;
2673 end_local_got = local_got + locsymcount;
2674 local_tls_type = elf_x86_64_local_got_tls_type (ibfd);
2675 local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd);
2677 srel = htab->elf.srelgot;
2678 for (; local_got < end_local_got;
2679 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2681 *local_tlsdesc_gotent = (bfd_vma) -1;
2684 if (GOT_TLS_GDESC_P (*local_tls_type))
2686 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2687 - elf_x86_64_compute_jump_table_size (htab);
2688 htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE;
2689 *local_got = (bfd_vma) -2;
2691 if (! GOT_TLS_GDESC_P (*local_tls_type)
2692 || GOT_TLS_GD_P (*local_tls_type))
2694 *local_got = s->size;
2695 s->size += GOT_ENTRY_SIZE;
2696 if (GOT_TLS_GD_P (*local_tls_type))
2697 s->size += GOT_ENTRY_SIZE;
2700 || GOT_TLS_GD_ANY_P (*local_tls_type)
2701 || *local_tls_type == GOT_TLS_IE)
2703 if (GOT_TLS_GDESC_P (*local_tls_type))
2705 htab->elf.srelplt->size
2706 += bed->s->sizeof_rela;
2707 htab->tlsdesc_plt = (bfd_vma) -1;
2709 if (! GOT_TLS_GDESC_P (*local_tls_type)
2710 || GOT_TLS_GD_P (*local_tls_type))
2711 srel->size += bed->s->sizeof_rela;
2715 *local_got = (bfd_vma) -1;
2719 if (htab->tls_ld_got.refcount > 0)
2721 /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
2723 htab->tls_ld_got.offset = htab->elf.sgot->size;
2724 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2725 htab->elf.srelgot->size += bed->s->sizeof_rela;
2728 htab->tls_ld_got.offset = -1;
2730 /* Allocate global sym .plt and .got entries, and space for global
2731 sym dynamic relocs. */
2732 elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs,
2735 /* Allocate .plt and .got entries, and space for local symbols. */
2736 htab_traverse (htab->loc_hash_table,
2737 elf_x86_64_allocate_local_dynrelocs,
2740 /* For every jump slot reserved in the sgotplt, reloc_count is
2741 incremented. However, when we reserve space for TLS descriptors,
2742 it's not incremented, so in order to compute the space reserved
2743 for them, it suffices to multiply the reloc count by the jump
2746 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2747 so that R_X86_64_IRELATIVE entries come last. */
2748 if (htab->elf.srelplt)
2750 htab->sgotplt_jump_table_size
2751 = elf_x86_64_compute_jump_table_size (htab);
2752 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2754 else if (htab->elf.irelplt)
2755 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2757 if (htab->tlsdesc_plt)
2759 /* If we're not using lazy TLS relocations, don't generate the
2760 PLT and GOT entries they require. */
2761 if ((info->flags & DF_BIND_NOW))
2762 htab->tlsdesc_plt = 0;
2765 htab->tlsdesc_got = htab->elf.sgot->size;
2766 htab->elf.sgot->size += GOT_ENTRY_SIZE;
2767 /* Reserve room for the initial entry.
2768 FIXME: we could probably do away with it in this case. */
2769 if (htab->elf.splt->size == 0)
2770 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
2771 htab->tlsdesc_plt = htab->elf.splt->size;
2772 htab->elf.splt->size += GET_PLT_ENTRY_SIZE (output_bfd);
2776 if (htab->elf.sgotplt)
2778 struct elf_link_hash_entry *got;
2779 got = elf_link_hash_lookup (elf_hash_table (info),
2780 "_GLOBAL_OFFSET_TABLE_",
2781 FALSE, FALSE, FALSE);
2783 /* Don't allocate .got.plt section if there are no GOT nor PLT
2784 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2786 || !got->ref_regular_nonweak)
2787 && (htab->elf.sgotplt->size
2788 == get_elf_backend_data (output_bfd)->got_header_size)
2789 && (htab->elf.splt == NULL
2790 || htab->elf.splt->size == 0)
2791 && (htab->elf.sgot == NULL
2792 || htab->elf.sgot->size == 0)
2793 && (htab->elf.iplt == NULL
2794 || htab->elf.iplt->size == 0)
2795 && (htab->elf.igotplt == NULL
2796 || htab->elf.igotplt->size == 0))
2797 htab->elf.sgotplt->size = 0;
2800 /* We now have determined the sizes of the various dynamic sections.
2801 Allocate memory for them. */
2803 for (s = dynobj->sections; s != NULL; s = s->next)
2805 if ((s->flags & SEC_LINKER_CREATED) == 0)
2808 if (s == htab->elf.splt
2809 || s == htab->elf.sgot
2810 || s == htab->elf.sgotplt
2811 || s == htab->elf.iplt
2812 || s == htab->elf.igotplt
2813 || s == htab->sdynbss)
2815 /* Strip this section if we don't need it; see the
2818 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2820 if (s->size != 0 && s != htab->elf.srelplt)
2823 /* We use the reloc_count field as a counter if we need
2824 to copy relocs into the output file. */
2825 if (s != htab->elf.srelplt)
2830 /* It's not one of our sections, so don't allocate space. */
2836 /* If we don't need this section, strip it from the
2837 output file. This is mostly to handle .rela.bss and
2838 .rela.plt. We must create both sections in
2839 create_dynamic_sections, because they must be created
2840 before the linker maps input sections to output
2841 sections. The linker does that before
2842 adjust_dynamic_symbol is called, and it is that
2843 function which decides whether anything needs to go
2844 into these sections. */
2846 s->flags |= SEC_EXCLUDE;
2850 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2853 /* Allocate memory for the section contents. We use bfd_zalloc
2854 here in case unused entries are not reclaimed before the
2855 section's contents are written out. This should not happen,
2856 but this way if it does, we get a R_X86_64_NONE reloc instead
2858 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2859 if (s->contents == NULL)
2863 if (htab->plt_eh_frame != NULL
2864 && htab->elf.splt != NULL
2865 && htab->elf.splt->size != 0
2866 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0)
2867 bfd_put_32 (dynobj, htab->elf.splt->size,
2868 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2870 if (htab->elf.dynamic_sections_created)
2872 /* Add some entries to the .dynamic section. We fill in the
2873 values later, in elf_x86_64_finish_dynamic_sections, but we
2874 must add the entries now so that we get the correct size for
2875 the .dynamic section. The DT_DEBUG entry is filled in by the
2876 dynamic linker and used by the debugger. */
2877 #define add_dynamic_entry(TAG, VAL) \
2878 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2880 if (info->executable)
2882 if (!add_dynamic_entry (DT_DEBUG, 0))
2886 if (htab->elf.splt->size != 0)
2888 if (!add_dynamic_entry (DT_PLTGOT, 0)
2889 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2890 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2891 || !add_dynamic_entry (DT_JMPREL, 0))
2894 if (htab->tlsdesc_plt
2895 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
2896 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
2902 if (!add_dynamic_entry (DT_RELA, 0)
2903 || !add_dynamic_entry (DT_RELASZ, 0)
2904 || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela))
2907 /* If any dynamic relocs apply to a read-only section,
2908 then we need a DT_TEXTREL entry. */
2909 if ((info->flags & DF_TEXTREL) == 0)
2910 elf_link_hash_traverse (&htab->elf,
2911 elf_x86_64_readonly_dynrelocs,
2914 if ((info->flags & DF_TEXTREL) != 0)
2916 if (!add_dynamic_entry (DT_TEXTREL, 0))
2921 #undef add_dynamic_entry
2927 elf_x86_64_always_size_sections (bfd *output_bfd,
2928 struct bfd_link_info *info)
2930 asection *tls_sec = elf_hash_table (info)->tls_sec;
2934 struct elf_link_hash_entry *tlsbase;
2936 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2937 "_TLS_MODULE_BASE_",
2938 FALSE, FALSE, FALSE);
2940 if (tlsbase && tlsbase->type == STT_TLS)
2942 struct elf_x86_64_link_hash_table *htab;
2943 struct bfd_link_hash_entry *bh = NULL;
2944 const struct elf_backend_data *bed
2945 = get_elf_backend_data (output_bfd);
2947 htab = elf_x86_64_hash_table (info);
2951 if (!(_bfd_generic_link_add_one_symbol
2952 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2953 tls_sec, 0, NULL, FALSE,
2954 bed->collect, &bh)))
2957 htab->tls_module_base = bh;
2959 tlsbase = (struct elf_link_hash_entry *)bh;
2960 tlsbase->def_regular = 1;
2961 tlsbase->other = STV_HIDDEN;
2962 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2969 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2970 executables. Rather than setting it to the beginning of the TLS
2971 section, we have to set it to the end. This function may be called
2972 multiple times, it is idempotent. */
2975 elf_x86_64_set_tls_module_base (struct bfd_link_info *info)
2977 struct elf_x86_64_link_hash_table *htab;
2978 struct bfd_link_hash_entry *base;
2980 if (!info->executable)
2983 htab = elf_x86_64_hash_table (info);
2987 base = htab->tls_module_base;
2991 base->u.def.value = htab->elf.tls_size;
2994 /* Return the base VMA address which should be subtracted from real addresses
2995 when resolving @dtpoff relocation.
2996 This is PT_TLS segment p_vaddr. */
2999 elf_x86_64_dtpoff_base (struct bfd_link_info *info)
3001 /* If tls_sec is NULL, we should have signalled an error already. */
3002 if (elf_hash_table (info)->tls_sec == NULL)
3004 return elf_hash_table (info)->tls_sec->vma;
3007 /* Return the relocation value for @tpoff relocation
3008 if STT_TLS virtual address is ADDRESS. */
3011 elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address)
3013 struct elf_link_hash_table *htab = elf_hash_table (info);
3014 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3015 bfd_vma static_tls_size;
3017 /* If tls_segment is NULL, we should have signalled an error already. */
3018 if (htab->tls_sec == NULL)
3021 /* Consider special static TLS alignment requirements. */
3022 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3023 return address - static_tls_size - htab->tls_sec->vma;
3026 /* Is the instruction before OFFSET in CONTENTS a 32bit relative
3030 is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset)
3032 /* Opcode Instruction
3035 0x0f 0x8x conditional jump */
3037 && (contents [offset - 1] == 0xe8
3038 || contents [offset - 1] == 0xe9))
3040 && contents [offset - 2] == 0x0f
3041 && (contents [offset - 1] & 0xf0) == 0x80));
3044 /* Relocate an x86_64 ELF section. */
3047 elf_x86_64_relocate_section (bfd *output_bfd,
3048 struct bfd_link_info *info,
3050 asection *input_section,
3052 Elf_Internal_Rela *relocs,
3053 Elf_Internal_Sym *local_syms,
3054 asection **local_sections)
3056 struct elf_x86_64_link_hash_table *htab;
3057 Elf_Internal_Shdr *symtab_hdr;
3058 struct elf_link_hash_entry **sym_hashes;
3059 bfd_vma *local_got_offsets;
3060 bfd_vma *local_tlsdesc_gotents;
3061 Elf_Internal_Rela *rel;
3062 Elf_Internal_Rela *relend;
3063 const unsigned int plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
3065 BFD_ASSERT (is_x86_64_elf (input_bfd));
3067 htab = elf_x86_64_hash_table (info);
3070 symtab_hdr = &elf_symtab_hdr (input_bfd);
3071 sym_hashes = elf_sym_hashes (input_bfd);
3072 local_got_offsets = elf_local_got_offsets (input_bfd);
3073 local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd);
3075 elf_x86_64_set_tls_module_base (info);
3078 relend = relocs + input_section->reloc_count;
3079 for (; rel < relend; rel++)
3081 unsigned int r_type;
3082 reloc_howto_type *howto;
3083 unsigned long r_symndx;
3084 struct elf_link_hash_entry *h;
3085 Elf_Internal_Sym *sym;
3087 bfd_vma off, offplt;
3089 bfd_boolean unresolved_reloc;
3090 bfd_reloc_status_type r;
3094 r_type = ELF32_R_TYPE (rel->r_info);
3095 if (r_type == (int) R_X86_64_GNU_VTINHERIT
3096 || r_type == (int) R_X86_64_GNU_VTENTRY)
3099 if (r_type >= R_X86_64_max)
3101 bfd_set_error (bfd_error_bad_value);
3105 if (r_type != (int) R_X86_64_32
3106 || ABI_64_P (output_bfd))
3107 howto = x86_64_elf_howto_table + r_type;
3109 howto = (x86_64_elf_howto_table
3110 + ARRAY_SIZE (x86_64_elf_howto_table) - 1);
3111 r_symndx = htab->r_sym (rel->r_info);
3115 unresolved_reloc = FALSE;
3116 if (r_symndx < symtab_hdr->sh_info)
3118 sym = local_syms + r_symndx;
3119 sec = local_sections[r_symndx];
3121 relocation = _bfd_elf_rela_local_sym (output_bfd, sym,
3124 /* Relocate against local STT_GNU_IFUNC symbol. */
3125 if (!info->relocatable
3126 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3128 h = elf_x86_64_get_local_sym_hash (htab, input_bfd,
3133 /* Set STT_GNU_IFUNC symbol value. */
3134 h->root.u.def.value = sym->st_value;
3135 h->root.u.def.section = sec;
3140 bfd_boolean warned ATTRIBUTE_UNUSED;
3142 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3143 r_symndx, symtab_hdr, sym_hashes,
3145 unresolved_reloc, warned);
3148 if (sec != NULL && discarded_section (sec))
3149 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3150 rel, 1, relend, howto, 0, contents);
3152 if (info->relocatable)
3155 if (rel->r_addend == 0
3156 && r_type == R_X86_64_64
3157 && !ABI_64_P (output_bfd))
3159 /* For x32, treat R_X86_64_64 like R_X86_64_32 and zero-extend
3160 it to 64bit if addend is zero. */
3161 r_type = R_X86_64_32;
3162 memset (contents + rel->r_offset + 4, 0, 4);
3165 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3166 it here if it is defined in a non-shared object. */
3168 && h->type == STT_GNU_IFUNC
3175 if ((input_section->flags & SEC_ALLOC) == 0
3176 || h->plt.offset == (bfd_vma) -1)
3179 /* STT_GNU_IFUNC symbol must go through PLT. */
3180 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3181 relocation = (plt->output_section->vma
3182 + plt->output_offset + h->plt.offset);
3187 if (h->root.root.string)
3188 name = h->root.root.string;
3190 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3192 (*_bfd_error_handler)
3193 (_("%B: relocation %s against STT_GNU_IFUNC "
3194 "symbol `%s' isn't handled by %s"), input_bfd,
3195 x86_64_elf_howto_table[r_type].name,
3196 name, __FUNCTION__);
3197 bfd_set_error (bfd_error_bad_value);
3206 if (ABI_64_P (output_bfd))
3210 if (rel->r_addend != 0)
3212 if (h->root.root.string)
3213 name = h->root.root.string;
3215 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3217 (*_bfd_error_handler)
3218 (_("%B: relocation %s against STT_GNU_IFUNC "
3219 "symbol `%s' has non-zero addend: %d"),
3220 input_bfd, x86_64_elf_howto_table[r_type].name,
3221 name, rel->r_addend);
3222 bfd_set_error (bfd_error_bad_value);
3226 /* Generate dynamic relcoation only when there is a
3227 non-GOT reference in a shared object. */
3228 if (info->shared && h->non_got_ref)
3230 Elf_Internal_Rela outrel;
3233 /* Need a dynamic relocation to get the real function
3235 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
3239 if (outrel.r_offset == (bfd_vma) -1
3240 || outrel.r_offset == (bfd_vma) -2)
3243 outrel.r_offset += (input_section->output_section->vma
3244 + input_section->output_offset);
3246 if (h->dynindx == -1
3248 || info->executable)
3250 /* This symbol is resolved locally. */
3251 outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
3252 outrel.r_addend = (h->root.u.def.value
3253 + h->root.u.def.section->output_section->vma
3254 + h->root.u.def.section->output_offset);
3258 outrel.r_info = htab->r_info (h->dynindx, r_type);
3259 outrel.r_addend = 0;
3262 sreloc = htab->elf.irelifunc;
3263 elf_append_rela (output_bfd, sreloc, &outrel);
3265 /* If this reloc is against an external symbol, we
3266 do not want to fiddle with the addend. Otherwise,
3267 we need to include the symbol value so that it
3268 becomes an addend for the dynamic reloc. For an
3269 internal symbol, we have updated addend. */
3275 case R_X86_64_PLT32:
3278 case R_X86_64_GOTPCREL:
3279 case R_X86_64_GOTPCREL64:
3280 base_got = htab->elf.sgot;
3281 off = h->got.offset;
3283 if (base_got == NULL)
3286 if (off == (bfd_vma) -1)
3288 /* We can't use h->got.offset here to save state, or
3289 even just remember the offset, as finish_dynamic_symbol
3290 would use that as offset into .got. */
3292 if (htab->elf.splt != NULL)
3294 plt_index = h->plt.offset / plt_entry_size - 1;
3295 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3296 base_got = htab->elf.sgotplt;
3300 plt_index = h->plt.offset / plt_entry_size;
3301 off = plt_index * GOT_ENTRY_SIZE;
3302 base_got = htab->elf.igotplt;
3305 if (h->dynindx == -1
3309 /* This references the local defitionion. We must
3310 initialize this entry in the global offset table.
3311 Since the offset must always be a multiple of 8,
3312 we use the least significant bit to record
3313 whether we have initialized it already.
3315 When doing a dynamic link, we create a .rela.got
3316 relocation entry to initialize the value. This
3317 is done in the finish_dynamic_symbol routine. */
3322 bfd_put_64 (output_bfd, relocation,
3323 base_got->contents + off);
3324 /* Note that this is harmless for the GOTPLT64
3325 case, as -1 | 1 still is -1. */
3331 relocation = (base_got->output_section->vma
3332 + base_got->output_offset + off);
3338 /* When generating a shared object, the relocations handled here are
3339 copied into the output file to be resolved at run time. */
3342 case R_X86_64_GOT32:
3343 case R_X86_64_GOT64:
3344 /* Relocation is to the entry for this symbol in the global
3346 case R_X86_64_GOTPCREL:
3347 case R_X86_64_GOTPCREL64:
3348 /* Use global offset table entry as symbol value. */
3349 case R_X86_64_GOTPLT64:
3350 /* This is the same as GOT64 for relocation purposes, but
3351 indicates the existence of a PLT entry. The difficulty is,
3352 that we must calculate the GOT slot offset from the PLT
3353 offset, if this symbol got a PLT entry (it was global).
3354 Additionally if it's computed from the PLT entry, then that
3355 GOT offset is relative to .got.plt, not to .got. */
3356 base_got = htab->elf.sgot;
3358 if (htab->elf.sgot == NULL)
3365 off = h->got.offset;
3367 && h->plt.offset != (bfd_vma)-1
3368 && off == (bfd_vma)-1)
3370 /* We can't use h->got.offset here to save
3371 state, or even just remember the offset, as
3372 finish_dynamic_symbol would use that as offset into
3374 bfd_vma plt_index = h->plt.offset / plt_entry_size - 1;
3375 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3376 base_got = htab->elf.sgotplt;
3379 dyn = htab->elf.dynamic_sections_created;
3381 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3383 && SYMBOL_REFERENCES_LOCAL (info, h))
3384 || (ELF_ST_VISIBILITY (h->other)
3385 && h->root.type == bfd_link_hash_undefweak))
3387 /* This is actually a static link, or it is a -Bsymbolic
3388 link and the symbol is defined locally, or the symbol
3389 was forced to be local because of a version file. We
3390 must initialize this entry in the global offset table.
3391 Since the offset must always be a multiple of 8, we
3392 use the least significant bit to record whether we
3393 have initialized it already.
3395 When doing a dynamic link, we create a .rela.got
3396 relocation entry to initialize the value. This is
3397 done in the finish_dynamic_symbol routine. */
3402 bfd_put_64 (output_bfd, relocation,
3403 base_got->contents + off);
3404 /* Note that this is harmless for the GOTPLT64 case,
3405 as -1 | 1 still is -1. */
3410 unresolved_reloc = FALSE;
3414 if (local_got_offsets == NULL)
3417 off = local_got_offsets[r_symndx];
3419 /* The offset must always be a multiple of 8. We use
3420 the least significant bit to record whether we have
3421 already generated the necessary reloc. */
3426 bfd_put_64 (output_bfd, relocation,
3427 base_got->contents + off);
3432 Elf_Internal_Rela outrel;
3434 /* We need to generate a R_X86_64_RELATIVE reloc
3435 for the dynamic linker. */
3436 s = htab->elf.srelgot;
3440 outrel.r_offset = (base_got->output_section->vma
3441 + base_got->output_offset
3443 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3444 outrel.r_addend = relocation;
3445 elf_append_rela (output_bfd, s, &outrel);
3448 local_got_offsets[r_symndx] |= 1;
3452 if (off >= (bfd_vma) -2)
3455 relocation = base_got->output_section->vma
3456 + base_got->output_offset + off;
3457 if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64)
3458 relocation -= htab->elf.sgotplt->output_section->vma
3459 - htab->elf.sgotplt->output_offset;
3463 case R_X86_64_GOTOFF64:
3464 /* Relocation is relative to the start of the global offset
3467 /* Check to make sure it isn't a protected function symbol
3468 for shared library since it may not be local when used
3469 as function address. */
3470 if (!info->executable
3472 && !SYMBOLIC_BIND (info, h)
3474 && h->type == STT_FUNC
3475 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3477 (*_bfd_error_handler)
3478 (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"),
3479 input_bfd, h->root.root.string);
3480 bfd_set_error (bfd_error_bad_value);
3484 /* Note that sgot is not involved in this
3485 calculation. We always want the start of .got.plt. If we
3486 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3487 permitted by the ABI, we might have to change this
3489 relocation -= htab->elf.sgotplt->output_section->vma
3490 + htab->elf.sgotplt->output_offset;
3493 case R_X86_64_GOTPC32:
3494 case R_X86_64_GOTPC64:
3495 /* Use global offset table as symbol value. */
3496 relocation = htab->elf.sgotplt->output_section->vma
3497 + htab->elf.sgotplt->output_offset;
3498 unresolved_reloc = FALSE;
3501 case R_X86_64_PLTOFF64:
3502 /* Relocation is PLT entry relative to GOT. For local
3503 symbols it's the symbol itself relative to GOT. */
3505 /* See PLT32 handling. */
3506 && h->plt.offset != (bfd_vma) -1
3507 && htab->elf.splt != NULL)
3509 relocation = (htab->elf.splt->output_section->vma
3510 + htab->elf.splt->output_offset
3512 unresolved_reloc = FALSE;
3515 relocation -= htab->elf.sgotplt->output_section->vma
3516 + htab->elf.sgotplt->output_offset;
3519 case R_X86_64_PLT32:
3520 /* Relocation is to the entry for this symbol in the
3521 procedure linkage table. */
3523 /* Resolve a PLT32 reloc against a local symbol directly,
3524 without using the procedure linkage table. */
3528 if (h->plt.offset == (bfd_vma) -1
3529 || htab->elf.splt == NULL)
3531 /* We didn't make a PLT entry for this symbol. This
3532 happens when statically linking PIC code, or when
3533 using -Bsymbolic. */
3537 relocation = (htab->elf.splt->output_section->vma
3538 + htab->elf.splt->output_offset
3540 unresolved_reloc = FALSE;
3547 && (input_section->flags & SEC_ALLOC) != 0
3548 && (input_section->flags & SEC_READONLY) != 0
3551 bfd_boolean fail = FALSE;
3553 = (r_type == R_X86_64_PC32
3554 && is_32bit_relative_branch (contents, rel->r_offset));
3556 if (SYMBOL_REFERENCES_LOCAL (info, h))
3558 /* Symbol is referenced locally. Make sure it is
3559 defined locally or for a branch. */
3560 fail = !h->def_regular && !branch;
3564 /* Symbol isn't referenced locally. We only allow
3565 branch to symbol with non-default visibility. */
3567 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT);
3574 const char *pic = "";
3576 switch (ELF_ST_VISIBILITY (h->other))
3579 v = _("hidden symbol");
3582 v = _("internal symbol");
3585 v = _("protected symbol");
3589 pic = _("; recompile with -fPIC");
3594 fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s");
3596 fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s");
3598 (*_bfd_error_handler) (fmt, input_bfd,
3599 x86_64_elf_howto_table[r_type].name,
3600 v, h->root.root.string, pic);
3601 bfd_set_error (bfd_error_bad_value);
3612 /* FIXME: The ABI says the linker should make sure the value is
3613 the same when it's zeroextended to 64 bit. */
3615 if ((input_section->flags & SEC_ALLOC) == 0)
3620 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3621 || h->root.type != bfd_link_hash_undefweak)
3622 && (! IS_X86_64_PCREL_TYPE (r_type)
3623 || ! SYMBOL_CALLS_LOCAL (info, h)))
3624 || (ELIMINATE_COPY_RELOCS
3631 || h->root.type == bfd_link_hash_undefweak
3632 || h->root.type == bfd_link_hash_undefined)))
3634 Elf_Internal_Rela outrel;
3635 bfd_boolean skip, relocate;
3638 /* When generating a shared object, these relocations
3639 are copied into the output file to be resolved at run
3645 _bfd_elf_section_offset (output_bfd, info, input_section,
3647 if (outrel.r_offset == (bfd_vma) -1)
3649 else if (outrel.r_offset == (bfd_vma) -2)
3650 skip = TRUE, relocate = TRUE;
3652 outrel.r_offset += (input_section->output_section->vma
3653 + input_section->output_offset);
3656 memset (&outrel, 0, sizeof outrel);
3658 /* h->dynindx may be -1 if this symbol was marked to
3662 && (IS_X86_64_PCREL_TYPE (r_type)
3664 || ! SYMBOLIC_BIND (info, h)
3665 || ! h->def_regular))
3667 outrel.r_info = htab->r_info (h->dynindx, r_type);
3668 outrel.r_addend = rel->r_addend;
3672 /* This symbol is local, or marked to become local. */
3673 if (r_type == htab->pointer_r_type)
3676 outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE);
3677 outrel.r_addend = relocation + rel->r_addend;
3679 else if (r_type == R_X86_64_64
3680 && !ABI_64_P (output_bfd))
3683 outrel.r_info = htab->r_info (0,
3684 R_X86_64_RELATIVE64);
3685 outrel.r_addend = relocation + rel->r_addend;
3686 /* Check addend overflow. */
3687 if ((outrel.r_addend & 0x80000000)
3688 != (rel->r_addend & 0x80000000))
3691 int addend = rel->r_addend;
3692 if (h && h->root.root.string)
3693 name = h->root.root.string;
3695 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3698 (*_bfd_error_handler)
3699 (_("%B: addend -0x%x in relocation %s against "
3700 "symbol `%s' at 0x%lx in section `%A' is "
3702 input_bfd, input_section, addend,
3703 x86_64_elf_howto_table[r_type].name,
3704 name, (unsigned long) rel->r_offset);
3706 (*_bfd_error_handler)
3707 (_("%B: addend 0x%x in relocation %s against "
3708 "symbol `%s' at 0x%lx in section `%A' is "
3710 input_bfd, input_section, addend,
3711 x86_64_elf_howto_table[r_type].name,
3712 name, (unsigned long) rel->r_offset);
3713 bfd_set_error (bfd_error_bad_value);
3721 if (bfd_is_abs_section (sec))
3723 else if (sec == NULL || sec->owner == NULL)
3725 bfd_set_error (bfd_error_bad_value);
3732 /* We are turning this relocation into one
3733 against a section symbol. It would be
3734 proper to subtract the symbol's value,
3735 osec->vma, from the emitted reloc addend,
3736 but ld.so expects buggy relocs. */
3737 osec = sec->output_section;
3738 sindx = elf_section_data (osec)->dynindx;
3741 asection *oi = htab->elf.text_index_section;
3742 sindx = elf_section_data (oi)->dynindx;
3744 BFD_ASSERT (sindx != 0);
3747 outrel.r_info = htab->r_info (sindx, r_type);
3748 outrel.r_addend = relocation + rel->r_addend;
3752 sreloc = elf_section_data (input_section)->sreloc;
3754 if (sreloc == NULL || sreloc->contents == NULL)
3756 r = bfd_reloc_notsupported;
3757 goto check_relocation_error;
3760 elf_append_rela (output_bfd, sreloc, &outrel);
3762 /* If this reloc is against an external symbol, we do
3763 not want to fiddle with the addend. Otherwise, we
3764 need to include the symbol value so that it becomes
3765 an addend for the dynamic reloc. */
3772 case R_X86_64_TLSGD:
3773 case R_X86_64_GOTPC32_TLSDESC:
3774 case R_X86_64_TLSDESC_CALL:
3775 case R_X86_64_GOTTPOFF:
3776 tls_type = GOT_UNKNOWN;
3777 if (h == NULL && local_got_offsets)
3778 tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx];
3780 tls_type = elf_x86_64_hash_entry (h)->tls_type;
3782 if (! elf_x86_64_tls_transition (info, input_bfd,
3783 input_section, contents,
3784 symtab_hdr, sym_hashes,
3785 &r_type, tls_type, rel,
3786 relend, h, r_symndx))
3789 if (r_type == R_X86_64_TPOFF32)
3791 bfd_vma roff = rel->r_offset;
3793 BFD_ASSERT (! unresolved_reloc);
3795 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
3797 /* GD->LE transition. For 64bit, change
3798 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
3799 .word 0x6666; rex64; call __tls_get_addr
3802 leaq foo@tpoff(%rax), %rax
3804 leaq foo@tlsgd(%rip), %rdi
3805 .word 0x6666; rex64; call __tls_get_addr
3808 leaq foo@tpoff(%rax), %rax */
3809 if (ABI_64_P (output_bfd))
3810 memcpy (contents + roff - 4,
3811 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3814 memcpy (contents + roff - 3,
3815 "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
3817 bfd_put_32 (output_bfd,
3818 elf_x86_64_tpoff (info, relocation),
3819 contents + roff + 8);
3820 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
3824 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
3826 /* GDesc -> LE transition.
3827 It's originally something like:
3828 leaq x@tlsdesc(%rip), %rax
3831 movl $x@tpoff, %rax. */
3833 unsigned int val, type;
3835 type = bfd_get_8 (input_bfd, contents + roff - 3);
3836 val = bfd_get_8 (input_bfd, contents + roff - 1);
3837 bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1),
3838 contents + roff - 3);
3839 bfd_put_8 (output_bfd, 0xc7, contents + roff - 2);
3840 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3841 contents + roff - 1);
3842 bfd_put_32 (output_bfd,
3843 elf_x86_64_tpoff (info, relocation),
3847 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
3849 /* GDesc -> LE transition.
3854 bfd_put_8 (output_bfd, 0x66, contents + roff);
3855 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3858 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF)
3860 /* IE->LE transition:
3861 Originally it can be one of:
3862 movq foo@gottpoff(%rip), %reg
3863 addq foo@gottpoff(%rip), %reg
3866 leaq foo(%reg), %reg
3869 unsigned int val, type, reg;
3871 val = bfd_get_8 (input_bfd, contents + roff - 3);
3872 type = bfd_get_8 (input_bfd, contents + roff - 2);
3873 reg = bfd_get_8 (input_bfd, contents + roff - 1);
3879 bfd_put_8 (output_bfd, 0x49,
3880 contents + roff - 3);
3881 else if (!ABI_64_P (output_bfd) && val == 0x44)
3882 bfd_put_8 (output_bfd, 0x41,
3883 contents + roff - 3);
3884 bfd_put_8 (output_bfd, 0xc7,
3885 contents + roff - 2);
3886 bfd_put_8 (output_bfd, 0xc0 | reg,
3887 contents + roff - 1);
3891 /* addq -> addq - addressing with %rsp/%r12 is
3894 bfd_put_8 (output_bfd, 0x49,
3895 contents + roff - 3);
3896 else if (!ABI_64_P (output_bfd) && val == 0x44)
3897 bfd_put_8 (output_bfd, 0x41,
3898 contents + roff - 3);
3899 bfd_put_8 (output_bfd, 0x81,
3900 contents + roff - 2);
3901 bfd_put_8 (output_bfd, 0xc0 | reg,
3902 contents + roff - 1);
3908 bfd_put_8 (output_bfd, 0x4d,
3909 contents + roff - 3);
3910 else if (!ABI_64_P (output_bfd) && val == 0x44)
3911 bfd_put_8 (output_bfd, 0x45,
3912 contents + roff - 3);
3913 bfd_put_8 (output_bfd, 0x8d,
3914 contents + roff - 2);
3915 bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
3916 contents + roff - 1);
3918 bfd_put_32 (output_bfd,
3919 elf_x86_64_tpoff (info, relocation),
3927 if (htab->elf.sgot == NULL)
3932 off = h->got.offset;
3933 offplt = elf_x86_64_hash_entry (h)->tlsdesc_got;
3937 if (local_got_offsets == NULL)
3940 off = local_got_offsets[r_symndx];
3941 offplt = local_tlsdesc_gotents[r_symndx];
3948 Elf_Internal_Rela outrel;
3952 if (htab->elf.srelgot == NULL)
3955 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3957 if (GOT_TLS_GDESC_P (tls_type))
3959 outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC);
3960 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt
3961 + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size);
3962 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3963 + htab->elf.sgotplt->output_offset
3965 + htab->sgotplt_jump_table_size);
3966 sreloc = htab->elf.srelplt;
3968 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
3970 outrel.r_addend = 0;
3971 elf_append_rela (output_bfd, sreloc, &outrel);
3974 sreloc = htab->elf.srelgot;
3976 outrel.r_offset = (htab->elf.sgot->output_section->vma
3977 + htab->elf.sgot->output_offset + off);
3979 if (GOT_TLS_GD_P (tls_type))
3980 dr_type = R_X86_64_DTPMOD64;
3981 else if (GOT_TLS_GDESC_P (tls_type))
3984 dr_type = R_X86_64_TPOFF64;
3986 bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off);
3987 outrel.r_addend = 0;
3988 if ((dr_type == R_X86_64_TPOFF64
3989 || dr_type == R_X86_64_TLSDESC) && indx == 0)
3990 outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info);
3991 outrel.r_info = htab->r_info (indx, dr_type);
3993 elf_append_rela (output_bfd, sreloc, &outrel);
3995 if (GOT_TLS_GD_P (tls_type))
3999 BFD_ASSERT (! unresolved_reloc);
4000 bfd_put_64 (output_bfd,
4001 relocation - elf_x86_64_dtpoff_base (info),
4002 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4006 bfd_put_64 (output_bfd, 0,
4007 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4008 outrel.r_info = htab->r_info (indx,
4010 outrel.r_offset += GOT_ENTRY_SIZE;
4011 elf_append_rela (output_bfd, sreloc,
4020 local_got_offsets[r_symndx] |= 1;
4023 if (off >= (bfd_vma) -2
4024 && ! GOT_TLS_GDESC_P (tls_type))
4026 if (r_type == ELF32_R_TYPE (rel->r_info))
4028 if (r_type == R_X86_64_GOTPC32_TLSDESC
4029 || r_type == R_X86_64_TLSDESC_CALL)
4030 relocation = htab->elf.sgotplt->output_section->vma
4031 + htab->elf.sgotplt->output_offset
4032 + offplt + htab->sgotplt_jump_table_size;
4034 relocation = htab->elf.sgot->output_section->vma
4035 + htab->elf.sgot->output_offset + off;
4036 unresolved_reloc = FALSE;
4040 bfd_vma roff = rel->r_offset;
4042 if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
4044 /* GD->IE transition. For 64bit, change
4045 .byte 0x66; leaq foo@tlsgd(%rip), %rdi
4046 .word 0x6666; rex64; call __tls_get_addr@plt
4049 addq foo@gottpoff(%rip), %rax
4051 leaq foo@tlsgd(%rip), %rdi
4052 .word 0x6666; rex64; call __tls_get_addr@plt
4055 addq foo@gottpoff(%rip), %rax */
4056 if (ABI_64_P (output_bfd))
4057 memcpy (contents + roff - 4,
4058 "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4061 memcpy (contents + roff - 3,
4062 "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
4065 relocation = (htab->elf.sgot->output_section->vma
4066 + htab->elf.sgot->output_offset + off
4068 - input_section->output_section->vma
4069 - input_section->output_offset
4071 bfd_put_32 (output_bfd, relocation,
4072 contents + roff + 8);
4073 /* Skip R_X86_64_PLT32. */
4077 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC)
4079 /* GDesc -> IE transition.
4080 It's originally something like:
4081 leaq x@tlsdesc(%rip), %rax
4084 movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */
4086 /* Now modify the instruction as appropriate. To
4087 turn a leaq into a movq in the form we use it, it
4088 suffices to change the second byte from 0x8d to
4090 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4092 bfd_put_32 (output_bfd,
4093 htab->elf.sgot->output_section->vma
4094 + htab->elf.sgot->output_offset + off
4096 - input_section->output_section->vma
4097 - input_section->output_offset
4102 else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL)
4104 /* GDesc -> IE transition.
4111 bfd_put_8 (output_bfd, 0x66, contents + roff);
4112 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4120 case R_X86_64_TLSLD:
4121 if (! elf_x86_64_tls_transition (info, input_bfd,
4122 input_section, contents,
4123 symtab_hdr, sym_hashes,
4124 &r_type, GOT_UNKNOWN,
4125 rel, relend, h, r_symndx))
4128 if (r_type != R_X86_64_TLSLD)
4130 /* LD->LE transition:
4131 leaq foo@tlsld(%rip), %rdi; call __tls_get_addr.
4132 For 64bit, we change it into:
4133 .word 0x6666; .byte 0x66; movq %fs:0, %rax.
4134 For 32bit, we change it into:
4135 nopl 0x0(%rax); movl %fs:0, %eax. */
4137 BFD_ASSERT (r_type == R_X86_64_TPOFF32);
4138 if (ABI_64_P (output_bfd))
4139 memcpy (contents + rel->r_offset - 3,
4140 "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
4142 memcpy (contents + rel->r_offset - 3,
4143 "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12);
4144 /* Skip R_X86_64_PC32/R_X86_64_PLT32. */
4149 if (htab->elf.sgot == NULL)
4152 off = htab->tls_ld_got.offset;
4157 Elf_Internal_Rela outrel;
4159 if (htab->elf.srelgot == NULL)
4162 outrel.r_offset = (htab->elf.sgot->output_section->vma
4163 + htab->elf.sgot->output_offset + off);
4165 bfd_put_64 (output_bfd, 0,
4166 htab->elf.sgot->contents + off);
4167 bfd_put_64 (output_bfd, 0,
4168 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
4169 outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64);
4170 outrel.r_addend = 0;
4171 elf_append_rela (output_bfd, htab->elf.srelgot,
4173 htab->tls_ld_got.offset |= 1;
4175 relocation = htab->elf.sgot->output_section->vma
4176 + htab->elf.sgot->output_offset + off;
4177 unresolved_reloc = FALSE;
4180 case R_X86_64_DTPOFF32:
4181 if (!info->executable|| (input_section->flags & SEC_CODE) == 0)
4182 relocation -= elf_x86_64_dtpoff_base (info);
4184 relocation = elf_x86_64_tpoff (info, relocation);
4187 case R_X86_64_TPOFF32:
4188 case R_X86_64_TPOFF64:
4189 BFD_ASSERT (info->executable);
4190 relocation = elf_x86_64_tpoff (info, relocation);
4197 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4198 because such sections are not SEC_ALLOC and thus ld.so will
4199 not process them. */
4200 if (unresolved_reloc
4201 && !((input_section->flags & SEC_DEBUGGING) != 0
4203 && _bfd_elf_section_offset (output_bfd, info, input_section,
4204 rel->r_offset) != (bfd_vma) -1)
4205 (*_bfd_error_handler)
4206 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4209 (long) rel->r_offset,
4211 h->root.root.string);
4214 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4215 contents, rel->r_offset,
4216 relocation, rel->r_addend);
4218 check_relocation_error:
4219 if (r != bfd_reloc_ok)
4224 name = h->root.root.string;
4227 name = bfd_elf_string_from_elf_section (input_bfd,
4228 symtab_hdr->sh_link,
4233 name = bfd_section_name (input_bfd, sec);
4236 if (r == bfd_reloc_overflow)
4238 if (! ((*info->callbacks->reloc_overflow)
4239 (info, (h ? &h->root : NULL), name, howto->name,
4240 (bfd_vma) 0, input_bfd, input_section,
4246 (*_bfd_error_handler)
4247 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4248 input_bfd, input_section,
4249 (long) rel->r_offset, name, (int) r);
4258 /* Finish up dynamic symbol handling. We set the contents of various
4259 dynamic sections here. */
4262 elf_x86_64_finish_dynamic_symbol (bfd *output_bfd,
4263 struct bfd_link_info *info,
4264 struct elf_link_hash_entry *h,
4265 Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4267 struct elf_x86_64_link_hash_table *htab;
4268 const struct elf_x86_64_backend_data *const abed
4269 = get_elf_x86_64_backend_data (output_bfd);
4271 htab = elf_x86_64_hash_table (info);
4275 if (h->plt.offset != (bfd_vma) -1)
4279 Elf_Internal_Rela rela;
4281 asection *plt, *gotplt, *relplt;
4282 const struct elf_backend_data *bed;
4284 /* When building a static executable, use .iplt, .igot.plt and
4285 .rela.iplt sections for STT_GNU_IFUNC symbols. */
4286 if (htab->elf.splt != NULL)
4288 plt = htab->elf.splt;
4289 gotplt = htab->elf.sgotplt;
4290 relplt = htab->elf.srelplt;
4294 plt = htab->elf.iplt;
4295 gotplt = htab->elf.igotplt;
4296 relplt = htab->elf.irelplt;
4299 /* This symbol has an entry in the procedure linkage table. Set
4301 if ((h->dynindx == -1
4302 && !((h->forced_local || info->executable)
4304 && h->type == STT_GNU_IFUNC))
4310 /* Get the index in the procedure linkage table which
4311 corresponds to this symbol. This is the index of this symbol
4312 in all the symbols for which we are making plt entries. The
4313 first entry in the procedure linkage table is reserved.
4315 Get the offset into the .got table of the entry that
4316 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
4317 bytes. The first three are reserved for the dynamic linker.
4319 For static executables, we don't reserve anything. */
4321 if (plt == htab->elf.splt)
4323 got_offset = h->plt.offset / abed->plt_entry_size - 1;
4324 got_offset = (got_offset + 3) * GOT_ENTRY_SIZE;
4328 got_offset = h->plt.offset / abed->plt_entry_size;
4329 got_offset = got_offset * GOT_ENTRY_SIZE;
4332 /* Fill in the entry in the procedure linkage table. */
4333 memcpy (plt->contents + h->plt.offset, abed->plt_entry,
4334 abed->plt_entry_size);
4336 /* Insert the relocation positions of the plt section. */
4338 /* Put offset the PC-relative instruction referring to the GOT entry,
4339 subtracting the size of that instruction. */
4340 bfd_put_32 (output_bfd,
4341 (gotplt->output_section->vma
4342 + gotplt->output_offset
4344 - plt->output_section->vma
4345 - plt->output_offset
4347 - abed->plt_got_insn_size),
4348 plt->contents + h->plt.offset + abed->plt_got_offset);
4350 /* Fill in the entry in the global offset table, initially this
4351 points to the second part of the PLT entry. */
4352 bfd_put_64 (output_bfd, (plt->output_section->vma
4353 + plt->output_offset
4354 + h->plt.offset + abed->plt_lazy_offset),
4355 gotplt->contents + got_offset);
4357 /* Fill in the entry in the .rela.plt section. */
4358 rela.r_offset = (gotplt->output_section->vma
4359 + gotplt->output_offset
4361 if (h->dynindx == -1
4362 || ((info->executable
4363 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4365 && h->type == STT_GNU_IFUNC))
4367 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4368 R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */
4369 rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE);
4370 rela.r_addend = (h->root.u.def.value
4371 + h->root.u.def.section->output_section->vma
4372 + h->root.u.def.section->output_offset);
4373 /* R_X86_64_IRELATIVE comes last. */
4374 plt_index = htab->next_irelative_index--;
4378 rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT);
4380 plt_index = htab->next_jump_slot_index++;
4383 /* Don't fill PLT entry for static executables. */
4384 if (plt == htab->elf.splt)
4386 /* Put relocation index. */
4387 bfd_put_32 (output_bfd, plt_index,
4388 plt->contents + h->plt.offset + abed->plt_reloc_offset);
4389 /* Put offset for jmp .PLT0. */
4390 bfd_put_32 (output_bfd, - (h->plt.offset + abed->plt_plt_insn_end),
4391 plt->contents + h->plt.offset + abed->plt_plt_offset);
4394 bed = get_elf_backend_data (output_bfd);
4395 loc = relplt->contents + plt_index * bed->s->sizeof_rela;
4396 bed->s->swap_reloca_out (output_bfd, &rela, loc);
4398 if (!h->def_regular)
4400 /* Mark the symbol as undefined, rather than as defined in
4401 the .plt section. Leave the value if there were any
4402 relocations where pointer equality matters (this is a clue
4403 for the dynamic linker, to make function pointer
4404 comparisons work between an application and shared
4405 library), otherwise set it to zero. If a function is only
4406 called from a binary, there is no need to slow down
4407 shared libraries because of that. */
4408 sym->st_shndx = SHN_UNDEF;
4409 if (!h->pointer_equality_needed)
4414 if (h->got.offset != (bfd_vma) -1
4415 && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type)
4416 && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
4418 Elf_Internal_Rela rela;
4420 /* This symbol has an entry in the global offset table. Set it
4422 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4425 rela.r_offset = (htab->elf.sgot->output_section->vma
4426 + htab->elf.sgot->output_offset
4427 + (h->got.offset &~ (bfd_vma) 1));
4429 /* If this is a static link, or it is a -Bsymbolic link and the
4430 symbol is defined locally or was forced to be local because
4431 of a version file, we just want to emit a RELATIVE reloc.
4432 The entry in the global offset table will already have been
4433 initialized in the relocate_section function. */
4435 && h->type == STT_GNU_IFUNC)
4439 /* Generate R_X86_64_GLOB_DAT. */
4446 if (!h->pointer_equality_needed)
4449 /* For non-shared object, we can't use .got.plt, which
4450 contains the real function addres if we need pointer
4451 equality. We load the GOT entry with the PLT entry. */
4452 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4453 bfd_put_64 (output_bfd, (plt->output_section->vma
4454 + plt->output_offset
4456 htab->elf.sgot->contents + h->got.offset);
4460 else if (info->shared
4461 && SYMBOL_REFERENCES_LOCAL (info, h))
4463 if (!h->def_regular)
4465 BFD_ASSERT((h->got.offset & 1) != 0);
4466 rela.r_info = htab->r_info (0, R_X86_64_RELATIVE);
4467 rela.r_addend = (h->root.u.def.value
4468 + h->root.u.def.section->output_section->vma
4469 + h->root.u.def.section->output_offset);
4473 BFD_ASSERT((h->got.offset & 1) == 0);
4475 bfd_put_64 (output_bfd, (bfd_vma) 0,
4476 htab->elf.sgot->contents + h->got.offset);
4477 rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT);
4481 elf_append_rela (output_bfd, htab->elf.srelgot, &rela);
4486 Elf_Internal_Rela rela;
4488 /* This symbol needs a copy reloc. Set it up. */
4490 if (h->dynindx == -1
4491 || (h->root.type != bfd_link_hash_defined
4492 && h->root.type != bfd_link_hash_defweak)
4493 || htab->srelbss == NULL)
4496 rela.r_offset = (h->root.u.def.value
4497 + h->root.u.def.section->output_section->vma
4498 + h->root.u.def.section->output_offset);
4499 rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY);
4501 elf_append_rela (output_bfd, htab->srelbss, &rela);
4507 /* Finish up local dynamic symbol handling. We set the contents of
4508 various dynamic sections here. */
4511 elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf)
4513 struct elf_link_hash_entry *h
4514 = (struct elf_link_hash_entry *) *slot;
4515 struct bfd_link_info *info
4516 = (struct bfd_link_info *) inf;
4518 return elf_x86_64_finish_dynamic_symbol (info->output_bfd,
4522 /* Used to decide how to sort relocs in an optimal manner for the
4523 dynamic linker, before writing them out. */
4525 static enum elf_reloc_type_class
4526 elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela)
4528 switch ((int) ELF32_R_TYPE (rela->r_info))
4530 case R_X86_64_RELATIVE:
4531 case R_X86_64_RELATIVE64:
4532 return reloc_class_relative;
4533 case R_X86_64_JUMP_SLOT:
4534 return reloc_class_plt;
4536 return reloc_class_copy;
4538 return reloc_class_normal;
4542 /* Finish up the dynamic sections. */
4545 elf_x86_64_finish_dynamic_sections (bfd *output_bfd,
4546 struct bfd_link_info *info)
4548 struct elf_x86_64_link_hash_table *htab;
4551 const struct elf_x86_64_backend_data *const abed
4552 = get_elf_x86_64_backend_data (output_bfd);
4554 htab = elf_x86_64_hash_table (info);
4558 dynobj = htab->elf.dynobj;
4559 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4561 if (htab->elf.dynamic_sections_created)
4563 bfd_byte *dyncon, *dynconend;
4564 const struct elf_backend_data *bed;
4565 bfd_size_type sizeof_dyn;
4567 if (sdyn == NULL || htab->elf.sgot == NULL)
4570 bed = get_elf_backend_data (dynobj);
4571 sizeof_dyn = bed->s->sizeof_dyn;
4572 dyncon = sdyn->contents;
4573 dynconend = sdyn->contents + sdyn->size;
4574 for (; dyncon < dynconend; dyncon += sizeof_dyn)
4576 Elf_Internal_Dyn dyn;
4579 (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn);
4587 s = htab->elf.sgotplt;
4588 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4592 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
4596 s = htab->elf.srelplt->output_section;
4597 dyn.d_un.d_val = s->size;
4601 /* The procedure linkage table relocs (DT_JMPREL) should
4602 not be included in the overall relocs (DT_RELA).
4603 Therefore, we override the DT_RELASZ entry here to
4604 make it not include the JMPREL relocs. Since the
4605 linker script arranges for .rela.plt to follow all
4606 other relocation sections, we don't have to worry
4607 about changing the DT_RELA entry. */
4608 if (htab->elf.srelplt != NULL)
4610 s = htab->elf.srelplt->output_section;
4611 dyn.d_un.d_val -= s->size;
4615 case DT_TLSDESC_PLT:
4617 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4618 + htab->tlsdesc_plt;
4621 case DT_TLSDESC_GOT:
4623 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
4624 + htab->tlsdesc_got;
4628 (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon);
4631 /* Fill in the special first entry in the procedure linkage table. */
4632 if (htab->elf.splt && htab->elf.splt->size > 0)
4634 /* Fill in the first entry in the procedure linkage table. */
4635 memcpy (htab->elf.splt->contents,
4636 abed->plt0_entry, abed->plt_entry_size);
4637 /* Add offset for pushq GOT+8(%rip), since the instruction
4638 uses 6 bytes subtract this value. */
4639 bfd_put_32 (output_bfd,
4640 (htab->elf.sgotplt->output_section->vma
4641 + htab->elf.sgotplt->output_offset
4643 - htab->elf.splt->output_section->vma
4644 - htab->elf.splt->output_offset
4646 htab->elf.splt->contents + abed->plt0_got1_offset);
4647 /* Add offset for the PC-relative instruction accessing GOT+16,
4648 subtracting the offset to the end of that instruction. */
4649 bfd_put_32 (output_bfd,
4650 (htab->elf.sgotplt->output_section->vma
4651 + htab->elf.sgotplt->output_offset
4653 - htab->elf.splt->output_section->vma
4654 - htab->elf.splt->output_offset
4655 - abed->plt0_got2_insn_end),
4656 htab->elf.splt->contents + abed->plt0_got2_offset);
4658 elf_section_data (htab->elf.splt->output_section)
4659 ->this_hdr.sh_entsize = abed->plt_entry_size;
4661 if (htab->tlsdesc_plt)
4663 bfd_put_64 (output_bfd, (bfd_vma) 0,
4664 htab->elf.sgot->contents + htab->tlsdesc_got);
4666 memcpy (htab->elf.splt->contents + htab->tlsdesc_plt,
4667 abed->plt0_entry, abed->plt_entry_size);
4669 /* Add offset for pushq GOT+8(%rip), since the
4670 instruction uses 6 bytes subtract this value. */
4671 bfd_put_32 (output_bfd,
4672 (htab->elf.sgotplt->output_section->vma
4673 + htab->elf.sgotplt->output_offset
4675 - htab->elf.splt->output_section->vma
4676 - htab->elf.splt->output_offset
4679 htab->elf.splt->contents
4680 + htab->tlsdesc_plt + abed->plt0_got1_offset);
4681 /* Add offset for the PC-relative instruction accessing GOT+TDG,
4682 where TGD stands for htab->tlsdesc_got, subtracting the offset
4683 to the end of that instruction. */
4684 bfd_put_32 (output_bfd,
4685 (htab->elf.sgot->output_section->vma
4686 + htab->elf.sgot->output_offset
4688 - htab->elf.splt->output_section->vma
4689 - htab->elf.splt->output_offset
4691 - abed->plt0_got2_insn_end),
4692 htab->elf.splt->contents
4693 + htab->tlsdesc_plt + abed->plt0_got2_offset);
4698 if (htab->elf.sgotplt)
4700 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4702 (*_bfd_error_handler)
4703 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4707 /* Fill in the first three entries in the global offset table. */
4708 if (htab->elf.sgotplt->size > 0)
4710 /* Set the first entry in the global offset table to the address of
4711 the dynamic section. */
4713 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents);
4715 bfd_put_64 (output_bfd,
4716 sdyn->output_section->vma + sdyn->output_offset,
4717 htab->elf.sgotplt->contents);
4718 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
4719 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE);
4720 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2);
4723 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize =
4727 /* Adjust .eh_frame for .plt section. */
4728 if (htab->plt_eh_frame != NULL)
4730 if (htab->elf.splt != NULL
4731 && htab->elf.splt->size != 0
4732 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4733 && htab->elf.splt->output_section != NULL
4734 && htab->plt_eh_frame->output_section != NULL)
4736 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4737 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4738 + htab->plt_eh_frame->output_offset
4739 + PLT_FDE_START_OFFSET;
4740 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4741 htab->plt_eh_frame->contents
4742 + PLT_FDE_START_OFFSET);
4744 if (htab->plt_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4746 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4748 htab->plt_eh_frame->contents))
4753 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4754 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize
4757 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4758 htab_traverse (htab->loc_hash_table,
4759 elf_x86_64_finish_local_dynamic_symbol,
4765 /* Return address for Ith PLT stub in section PLT, for relocation REL
4766 or (bfd_vma) -1 if it should not be included. */
4769 elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt,
4770 const arelent *rel ATTRIBUTE_UNUSED)
4772 return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner);
4775 /* Handle an x86-64 specific section when reading an object file. This
4776 is called when elfcode.h finds a section with an unknown type. */
4779 elf_x86_64_section_from_shdr (bfd *abfd,
4780 Elf_Internal_Shdr *hdr,
4784 if (hdr->sh_type != SHT_X86_64_UNWIND)
4787 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
4793 /* Hook called by the linker routine which adds symbols from an object
4794 file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead
4798 elf_x86_64_add_symbol_hook (bfd *abfd,
4799 struct bfd_link_info *info,
4800 Elf_Internal_Sym *sym,
4801 const char **namep ATTRIBUTE_UNUSED,
4802 flagword *flagsp ATTRIBUTE_UNUSED,
4808 switch (sym->st_shndx)
4810 case SHN_X86_64_LCOMMON:
4811 lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON");
4814 lcomm = bfd_make_section_with_flags (abfd,
4818 | SEC_LINKER_CREATED));
4821 elf_section_flags (lcomm) |= SHF_X86_64_LARGE;
4824 *valp = sym->st_size;
4828 if ((abfd->flags & DYNAMIC) == 0
4829 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
4830 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
4831 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4837 /* Given a BFD section, try to locate the corresponding ELF section
4841 elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
4842 asection *sec, int *index_return)
4844 if (sec == &_bfd_elf_large_com_section)
4846 *index_return = SHN_X86_64_LCOMMON;
4852 /* Process a symbol. */
4855 elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
4858 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
4860 switch (elfsym->internal_elf_sym.st_shndx)
4862 case SHN_X86_64_LCOMMON:
4863 asym->section = &_bfd_elf_large_com_section;
4864 asym->value = elfsym->internal_elf_sym.st_size;
4865 /* Common symbol doesn't set BSF_GLOBAL. */
4866 asym->flags &= ~BSF_GLOBAL;
4872 elf_x86_64_common_definition (Elf_Internal_Sym *sym)
4874 return (sym->st_shndx == SHN_COMMON
4875 || sym->st_shndx == SHN_X86_64_LCOMMON);
4879 elf_x86_64_common_section_index (asection *sec)
4881 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
4884 return SHN_X86_64_LCOMMON;
4888 elf_x86_64_common_section (asection *sec)
4890 if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0)
4891 return bfd_com_section_ptr;
4893 return &_bfd_elf_large_com_section;
4897 elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
4898 struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED,
4899 struct elf_link_hash_entry *h,
4900 Elf_Internal_Sym *sym,
4902 bfd_vma *pvalue ATTRIBUTE_UNUSED,
4903 unsigned int *pold_alignment ATTRIBUTE_UNUSED,
4904 bfd_boolean *skip ATTRIBUTE_UNUSED,
4905 bfd_boolean *override ATTRIBUTE_UNUSED,
4906 bfd_boolean *type_change_ok ATTRIBUTE_UNUSED,
4907 bfd_boolean *size_change_ok ATTRIBUTE_UNUSED,
4908 bfd_boolean *newdyn ATTRIBUTE_UNUSED,
4909 bfd_boolean *newdef,
4910 bfd_boolean *newdyncommon ATTRIBUTE_UNUSED,
4911 bfd_boolean *newweak ATTRIBUTE_UNUSED,
4912 bfd *abfd ATTRIBUTE_UNUSED,
4914 bfd_boolean *olddyn ATTRIBUTE_UNUSED,
4915 bfd_boolean *olddef,
4916 bfd_boolean *olddyncommon ATTRIBUTE_UNUSED,
4917 bfd_boolean *oldweak ATTRIBUTE_UNUSED,
4921 /* A normal common symbol and a large common symbol result in a
4922 normal common symbol. We turn the large common symbol into a
4925 && h->root.type == bfd_link_hash_common
4927 && bfd_is_com_section (*sec)
4930 if (sym->st_shndx == SHN_COMMON
4931 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0)
4933 h->root.u.c.p->section
4934 = bfd_make_section_old_way (oldbfd, "COMMON");
4935 h->root.u.c.p->section->flags = SEC_ALLOC;
4937 else if (sym->st_shndx == SHN_X86_64_LCOMMON
4938 && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0)
4939 *psec = *sec = bfd_com_section_ptr;
4946 elf_x86_64_additional_program_headers (bfd *abfd,
4947 struct bfd_link_info *info ATTRIBUTE_UNUSED)
4952 /* Check to see if we need a large readonly segment. */
4953 s = bfd_get_section_by_name (abfd, ".lrodata");
4954 if (s && (s->flags & SEC_LOAD))
4957 /* Check to see if we need a large data segment. Since .lbss sections
4958 is placed right after the .bss section, there should be no need for
4959 a large data segment just because of .lbss. */
4960 s = bfd_get_section_by_name (abfd, ".ldata");
4961 if (s && (s->flags & SEC_LOAD))
4967 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4970 elf_x86_64_hash_symbol (struct elf_link_hash_entry *h)
4972 if (h->plt.offset != (bfd_vma) -1
4974 && !h->pointer_equality_needed)
4977 return _bfd_elf_hash_symbol (h);
4980 /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */
4983 elf_x86_64_relocs_compatible (const bfd_target *input,
4984 const bfd_target *output)
4986 return ((xvec_get_elf_backend_data (input)->s->elfclass
4987 == xvec_get_elf_backend_data (output)->s->elfclass)
4988 && _bfd_elf_relocs_compatible (input, output));
4991 static const struct bfd_elf_special_section
4992 elf_x86_64_special_sections[]=
4994 { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
4995 { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
4996 { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE},
4997 { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
4998 { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE},
4999 { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE},
5000 { NULL, 0, 0, 0, 0 }
5003 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec
5004 #define TARGET_LITTLE_NAME "elf64-x86-64"
5005 #define ELF_ARCH bfd_arch_i386
5006 #define ELF_TARGET_ID X86_64_ELF_DATA
5007 #define ELF_MACHINE_CODE EM_X86_64
5008 #define ELF_MAXPAGESIZE 0x200000
5009 #define ELF_MINPAGESIZE 0x1000
5010 #define ELF_COMMONPAGESIZE 0x1000
5012 #define elf_backend_can_gc_sections 1
5013 #define elf_backend_can_refcount 1
5014 #define elf_backend_want_got_plt 1
5015 #define elf_backend_plt_readonly 1
5016 #define elf_backend_want_plt_sym 0
5017 #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3)
5018 #define elf_backend_rela_normal 1
5019 #define elf_backend_plt_alignment 4
5021 #define elf_info_to_howto elf_x86_64_info_to_howto
5023 #define bfd_elf64_bfd_link_hash_table_create \
5024 elf_x86_64_link_hash_table_create
5025 #define bfd_elf64_bfd_link_hash_table_free \
5026 elf_x86_64_link_hash_table_free
5027 #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup
5028 #define bfd_elf64_bfd_reloc_name_lookup \
5029 elf_x86_64_reloc_name_lookup
5031 #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol
5032 #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible
5033 #define elf_backend_check_relocs elf_x86_64_check_relocs
5034 #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol
5035 #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections
5036 #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections
5037 #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol
5038 #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook
5039 #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook
5040 #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus
5041 #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo
5043 #define elf_backend_write_core_note elf_x86_64_write_core_note
5045 #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class
5046 #define elf_backend_relocate_section elf_x86_64_relocate_section
5047 #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections
5048 #define elf_backend_always_size_sections elf_x86_64_always_size_sections
5049 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
5050 #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val
5051 #define elf_backend_object_p elf64_x86_64_elf_object_p
5052 #define bfd_elf64_mkobject elf_x86_64_mkobject
5054 #define elf_backend_section_from_shdr \
5055 elf_x86_64_section_from_shdr
5057 #define elf_backend_section_from_bfd_section \
5058 elf_x86_64_elf_section_from_bfd_section
5059 #define elf_backend_add_symbol_hook \
5060 elf_x86_64_add_symbol_hook
5061 #define elf_backend_symbol_processing \
5062 elf_x86_64_symbol_processing
5063 #define elf_backend_common_section_index \
5064 elf_x86_64_common_section_index
5065 #define elf_backend_common_section \
5066 elf_x86_64_common_section
5067 #define elf_backend_common_definition \
5068 elf_x86_64_common_definition
5069 #define elf_backend_merge_symbol \
5070 elf_x86_64_merge_symbol
5071 #define elf_backend_special_sections \
5072 elf_x86_64_special_sections
5073 #define elf_backend_additional_program_headers \
5074 elf_x86_64_additional_program_headers
5075 #define elf_backend_hash_symbol \
5076 elf_x86_64_hash_symbol
5078 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5080 #include "elf64-target.h"
5082 /* FreeBSD support. */
5084 #undef TARGET_LITTLE_SYM
5085 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec
5086 #undef TARGET_LITTLE_NAME
5087 #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd"
5090 #define ELF_OSABI ELFOSABI_FREEBSD
5093 #define elf64_bed elf64_x86_64_fbsd_bed
5095 #include "elf64-target.h"
5097 /* Solaris 2 support. */
5099 #undef TARGET_LITTLE_SYM
5100 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec
5101 #undef TARGET_LITTLE_NAME
5102 #define TARGET_LITTLE_NAME "elf64-x86-64-sol2"
5104 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5105 objects won't be recognized. */
5109 #define elf64_bed elf64_x86_64_sol2_bed
5111 /* The 64-bit static TLS arena size is rounded to the nearest 16-byte
5113 #undef elf_backend_static_tls_alignment
5114 #define elf_backend_static_tls_alignment 16
5116 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5118 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5120 #undef elf_backend_want_plt_sym
5121 #define elf_backend_want_plt_sym 1
5123 #include "elf64-target.h"
5125 /* Native Client support. */
5127 #undef TARGET_LITTLE_SYM
5128 #define TARGET_LITTLE_SYM bfd_elf64_x86_64_nacl_vec
5129 #undef TARGET_LITTLE_NAME
5130 #define TARGET_LITTLE_NAME "elf64-x86-64-nacl"
5132 #define elf64_bed elf64_x86_64_nacl_bed
5134 #undef ELF_MAXPAGESIZE
5135 #undef ELF_MINPAGESIZE
5136 #undef ELF_COMMONPAGESIZE
5137 #define ELF_MAXPAGESIZE 0x10000
5138 #define ELF_MINPAGESIZE 0x10000
5139 #define ELF_COMMONPAGESIZE 0x10000
5141 /* Restore defaults. */
5143 #undef elf_backend_static_tls_alignment
5144 #undef elf_backend_want_plt_sym
5145 #define elf_backend_want_plt_sym 0
5147 /* NaCl uses substantially different PLT entries for the same effects. */
5149 #undef elf_backend_plt_alignment
5150 #define elf_backend_plt_alignment 5
5151 #define NACL_PLT_ENTRY_SIZE 64
5152 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5154 static const bfd_byte elf_x86_64_nacl_plt0_entry[NACL_PLT_ENTRY_SIZE] =
5156 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */
5157 0x4c, 0x8b, 0x1d, 16, 0, 0, 0, /* mov GOT+16(%rip), %r11 */
5158 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5159 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5160 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5162 /* 9-byte nop sequence to pad out to the next 32-byte boundary. */
5163 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopl %cs:0x0(%rax,%rax,1) */
5165 /* 32 bytes of nop to pad out to the standard size. */
5166 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5167 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5168 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5169 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5170 0x66, /* excess data32 prefix */
5174 static const bfd_byte elf_x86_64_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5176 0x4c, 0x8b, 0x1d, 0, 0, 0, 0, /* mov name@GOTPCREL(%rip),%r11 */
5177 0x41, 0x83, 0xe3, NACLMASK, /* and $-32, %r11d */
5178 0x4d, 0x01, 0xfb, /* add %r15, %r11 */
5179 0x41, 0xff, 0xe3, /* jmpq *%r11 */
5181 /* 15-byte nop sequence to pad out to the next 32-byte boundary. */
5182 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5183 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5185 /* Lazy GOT entries point here (32-byte aligned). */
5186 0x68, /* pushq immediate */
5187 0, 0, 0, 0, /* replaced with index into relocation table. */
5188 0xe9, /* jmp relative */
5189 0, 0, 0, 0, /* replaced with offset to start of .plt0. */
5191 /* 22 bytes of nop to pad out to the standard size. */
5192 0x66, 0x66, 0x66, 0x66, 0x66, 0x66, /* excess data32 prefixes */
5193 0x2e, 0x0f, 0x1f, 0x84, 0, 0, 0, 0, 0, /* nopw %cs:0x0(%rax,%rax,1) */
5194 0x0f, 0x1f, 0x80, 0, 0, 0, 0, /* nopl 0x0(%rax) */
5197 /* .eh_frame covering the .plt section. */
5199 static const bfd_byte elf_x86_64_nacl_eh_frame_plt[] =
5201 #if (PLT_CIE_LENGTH != 20 \
5202 || PLT_FDE_LENGTH != 36 \
5203 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5204 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5205 # error "Need elf_x86_64_backend_data parameters for eh_frame_plt offsets!"
5207 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5208 0, 0, 0, 0, /* CIE ID */
5209 1, /* CIE version */
5210 'z', 'R', 0, /* Augmentation string */
5211 1, /* Code alignment factor */
5212 0x78, /* Data alignment factor */
5213 16, /* Return address column */
5214 1, /* Augmentation size */
5215 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5216 DW_CFA_def_cfa, 7, 8, /* DW_CFA_def_cfa: r7 (rsp) ofs 8 */
5217 DW_CFA_offset + 16, 1, /* DW_CFA_offset: r16 (rip) at cfa-8 */
5218 DW_CFA_nop, DW_CFA_nop,
5220 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5221 PLT_CIE_LENGTH + 8, 0, 0, 0,/* CIE pointer */
5222 0, 0, 0, 0, /* R_X86_64_PC32 .plt goes here */
5223 0, 0, 0, 0, /* .plt size goes here */
5224 0, /* Augmentation size */
5225 DW_CFA_def_cfa_offset, 16, /* DW_CFA_def_cfa_offset: 16 */
5226 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5227 DW_CFA_def_cfa_offset, 24, /* DW_CFA_def_cfa_offset: 24 */
5228 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5229 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5230 13, /* Block length */
5231 DW_OP_breg7, 8, /* DW_OP_breg7 (rsp): 8 */
5232 DW_OP_breg16, 0, /* DW_OP_breg16 (rip): 0 */
5233 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5234 DW_OP_lit3, DW_OP_shl, DW_OP_plus,
5235 DW_CFA_nop, DW_CFA_nop
5238 static const struct elf_x86_64_backend_data elf_x86_64_nacl_arch_bed =
5240 elf_x86_64_nacl_plt0_entry, /* plt0_entry */
5241 elf_x86_64_nacl_plt_entry, /* plt_entry */
5242 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5243 2, /* plt0_got1_offset */
5244 9, /* plt0_got2_offset */
5245 13, /* plt0_got2_insn_end */
5246 3, /* plt_got_offset */
5247 33, /* plt_reloc_offset */
5248 38, /* plt_plt_offset */
5249 7, /* plt_got_insn_size */
5250 42, /* plt_plt_insn_end */
5251 32, /* plt_lazy_offset */
5252 elf_x86_64_nacl_eh_frame_plt, /* eh_frame_plt */
5253 sizeof (elf_x86_64_nacl_eh_frame_plt), /* eh_frame_plt_size */
5256 #undef elf_backend_arch_data
5257 #define elf_backend_arch_data &elf_x86_64_nacl_arch_bed
5259 #undef elf_backend_modify_segment_map
5260 #define elf_backend_modify_segment_map nacl_modify_segment_map
5261 #undef elf_backend_modify_program_headers
5262 #define elf_backend_modify_program_headers nacl_modify_program_headers
5264 #include "elf64-target.h"
5266 /* Native Client x32 support. */
5268 #undef TARGET_LITTLE_SYM
5269 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_nacl_vec
5270 #undef TARGET_LITTLE_NAME
5271 #define TARGET_LITTLE_NAME "elf32-x86-64-nacl"
5273 #define elf32_bed elf32_x86_64_nacl_bed
5275 #define bfd_elf32_bfd_link_hash_table_create \
5276 elf_x86_64_link_hash_table_create
5277 #define bfd_elf32_bfd_link_hash_table_free \
5278 elf_x86_64_link_hash_table_free
5279 #define bfd_elf32_bfd_reloc_type_lookup \
5280 elf_x86_64_reloc_type_lookup
5281 #define bfd_elf32_bfd_reloc_name_lookup \
5282 elf_x86_64_reloc_name_lookup
5283 #define bfd_elf32_mkobject \
5286 #undef elf_backend_object_p
5287 #define elf_backend_object_p \
5288 elf32_x86_64_elf_object_p
5290 #undef elf_backend_bfd_from_remote_memory
5291 #define elf_backend_bfd_from_remote_memory \
5292 _bfd_elf32_bfd_from_remote_memory
5294 #undef elf_backend_size_info
5295 #define elf_backend_size_info \
5296 _bfd_elf32_size_info
5298 #include "elf32-target.h"
5300 /* Restore defaults. */
5301 #undef elf_backend_object_p
5302 #define elf_backend_object_p elf64_x86_64_elf_object_p
5303 #undef elf_backend_bfd_from_remote_memory
5304 #undef elf_backend_size_info
5305 #undef elf_backend_modify_segment_map
5306 #undef elf_backend_modify_program_headers
5308 /* Intel L1OM support. */
5311 elf64_l1om_elf_object_p (bfd *abfd)
5313 /* Set the right machine number for an L1OM elf64 file. */
5314 bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om);
5318 #undef TARGET_LITTLE_SYM
5319 #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec
5320 #undef TARGET_LITTLE_NAME
5321 #define TARGET_LITTLE_NAME "elf64-l1om"
5323 #define ELF_ARCH bfd_arch_l1om
5325 #undef ELF_MACHINE_CODE
5326 #define ELF_MACHINE_CODE EM_L1OM
5331 #define elf64_bed elf64_l1om_bed
5333 #undef elf_backend_object_p
5334 #define elf_backend_object_p elf64_l1om_elf_object_p
5336 /* Restore defaults. */
5337 #undef ELF_MAXPAGESIZE
5338 #undef ELF_MINPAGESIZE
5339 #undef ELF_COMMONPAGESIZE
5340 #define ELF_MAXPAGESIZE 0x200000
5341 #define ELF_MINPAGESIZE 0x1000
5342 #define ELF_COMMONPAGESIZE 0x1000
5343 #undef elf_backend_plt_alignment
5344 #define elf_backend_plt_alignment 4
5345 #undef elf_backend_arch_data
5346 #define elf_backend_arch_data &elf_x86_64_arch_bed
5348 #include "elf64-target.h"
5350 /* FreeBSD L1OM support. */
5352 #undef TARGET_LITTLE_SYM
5353 #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec
5354 #undef TARGET_LITTLE_NAME
5355 #define TARGET_LITTLE_NAME "elf64-l1om-freebsd"
5358 #define ELF_OSABI ELFOSABI_FREEBSD
5361 #define elf64_bed elf64_l1om_fbsd_bed
5363 #include "elf64-target.h"
5365 /* Intel K1OM support. */
5368 elf64_k1om_elf_object_p (bfd *abfd)
5370 /* Set the right machine number for an K1OM elf64 file. */
5371 bfd_default_set_arch_mach (abfd, bfd_arch_k1om, bfd_mach_k1om);
5375 #undef TARGET_LITTLE_SYM
5376 #define TARGET_LITTLE_SYM bfd_elf64_k1om_vec
5377 #undef TARGET_LITTLE_NAME
5378 #define TARGET_LITTLE_NAME "elf64-k1om"
5380 #define ELF_ARCH bfd_arch_k1om
5382 #undef ELF_MACHINE_CODE
5383 #define ELF_MACHINE_CODE EM_K1OM
5388 #define elf64_bed elf64_k1om_bed
5390 #undef elf_backend_object_p
5391 #define elf_backend_object_p elf64_k1om_elf_object_p
5393 #undef elf_backend_static_tls_alignment
5395 #undef elf_backend_want_plt_sym
5396 #define elf_backend_want_plt_sym 0
5398 #include "elf64-target.h"
5400 /* FreeBSD K1OM support. */
5402 #undef TARGET_LITTLE_SYM
5403 #define TARGET_LITTLE_SYM bfd_elf64_k1om_freebsd_vec
5404 #undef TARGET_LITTLE_NAME
5405 #define TARGET_LITTLE_NAME "elf64-k1om-freebsd"
5408 #define ELF_OSABI ELFOSABI_FREEBSD
5411 #define elf64_bed elf64_k1om_fbsd_bed
5413 #include "elf64-target.h"
5415 /* 32bit x86-64 support. */
5417 #undef TARGET_LITTLE_SYM
5418 #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec
5419 #undef TARGET_LITTLE_NAME
5420 #define TARGET_LITTLE_NAME "elf32-x86-64"
5424 #define ELF_ARCH bfd_arch_i386
5426 #undef ELF_MACHINE_CODE
5427 #define ELF_MACHINE_CODE EM_X86_64
5431 #undef elf_backend_object_p
5432 #define elf_backend_object_p \
5433 elf32_x86_64_elf_object_p
5435 #undef elf_backend_bfd_from_remote_memory
5436 #define elf_backend_bfd_from_remote_memory \
5437 _bfd_elf32_bfd_from_remote_memory
5439 #undef elf_backend_size_info
5440 #define elf_backend_size_info \
5441 _bfd_elf32_size_info
5443 #include "elf32-target.h"