1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2017 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
21 #include "elfxx-x86.h"
23 #include "elf-vxworks.h"
25 #include "opcode/i386.h"
27 /* 386 uses REL relocations instead of RELA. */
32 static reloc_howto_type elf_howto_table[]=
34 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
35 bfd_elf_generic_reloc, "R_386_NONE",
36 TRUE, 0x00000000, 0x00000000, FALSE),
37 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
38 bfd_elf_generic_reloc, "R_386_32",
39 TRUE, 0xffffffff, 0xffffffff, FALSE),
40 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
41 bfd_elf_generic_reloc, "R_386_PC32",
42 TRUE, 0xffffffff, 0xffffffff, TRUE),
43 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
44 bfd_elf_generic_reloc, "R_386_GOT32",
45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
47 bfd_elf_generic_reloc, "R_386_PLT32",
48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
50 bfd_elf_generic_reloc, "R_386_COPY",
51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
53 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
54 TRUE, 0xffffffff, 0xffffffff, FALSE),
55 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_386_RELATIVE",
60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_386_GOTOFF",
63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_386_GOTPC",
66 TRUE, 0xffffffff, 0xffffffff, TRUE),
68 /* We have a gap in the reloc numbers here.
69 R_386_standard counts the number up to this point, and
70 R_386_ext_offset is the value to subtract from a reloc type of
71 R_386_16 thru R_386_PC8 to form an index into this table. */
72 #define R_386_standard (R_386_GOTPC + 1)
73 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
75 /* These relocs are a GNU extension. */
76 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
78 TRUE, 0xffffffff, 0xffffffff, FALSE),
79 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_386_TLS_IE",
81 TRUE, 0xffffffff, 0xffffffff, FALSE),
82 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_386_TLS_LE",
87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_386_TLS_GD",
90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_386_TLS_LDM",
93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_386_16",
96 TRUE, 0xffff, 0xffff, FALSE),
97 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_386_PC16",
99 TRUE, 0xffff, 0xffff, TRUE),
100 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_386_8",
102 TRUE, 0xff, 0xff, FALSE),
103 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
104 bfd_elf_generic_reloc, "R_386_PC8",
105 TRUE, 0xff, 0xff, TRUE),
107 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
108 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
109 /* These are common with Solaris TLS implementation. */
110 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
112 TRUE, 0xffffffff, 0xffffffff, FALSE),
113 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
115 TRUE, 0xffffffff, 0xffffffff, FALSE),
116 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
127 TRUE, 0xffffffff, 0xffffffff, FALSE),
128 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
129 bfd_elf_generic_reloc, "R_386_SIZE32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
131 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
133 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
135 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
137 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_DESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
140 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_386_IRELATIVE",
142 TRUE, 0xffffffff, 0xffffffff, FALSE),
143 HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_GOT32X",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
148 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
149 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
151 /* GNU extension to record C++ vtable hierarchy. */
152 HOWTO (R_386_GNU_VTINHERIT, /* type */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
156 FALSE, /* pc_relative */
158 complain_overflow_dont, /* complain_on_overflow */
159 NULL, /* special_function */
160 "R_386_GNU_VTINHERIT", /* name */
161 FALSE, /* partial_inplace */
164 FALSE), /* pcrel_offset */
166 /* GNU extension to record C++ vtable member usage. */
167 HOWTO (R_386_GNU_VTENTRY, /* type */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
171 FALSE, /* pc_relative */
173 complain_overflow_dont, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
175 "R_386_GNU_VTENTRY", /* name */
176 FALSE, /* partial_inplace */
179 FALSE) /* pcrel_offset */
181 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
185 #ifdef DEBUG_GEN_RELOC
187 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
192 static reloc_howto_type *
193 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
194 bfd_reloc_code_real_type code)
199 TRACE ("BFD_RELOC_NONE");
200 return &elf_howto_table[R_386_NONE];
203 TRACE ("BFD_RELOC_32");
204 return &elf_howto_table[R_386_32];
207 TRACE ("BFD_RELOC_CTOR");
208 return &elf_howto_table[R_386_32];
210 case BFD_RELOC_32_PCREL:
211 TRACE ("BFD_RELOC_PC32");
212 return &elf_howto_table[R_386_PC32];
214 case BFD_RELOC_386_GOT32:
215 TRACE ("BFD_RELOC_386_GOT32");
216 return &elf_howto_table[R_386_GOT32];
218 case BFD_RELOC_386_PLT32:
219 TRACE ("BFD_RELOC_386_PLT32");
220 return &elf_howto_table[R_386_PLT32];
222 case BFD_RELOC_386_COPY:
223 TRACE ("BFD_RELOC_386_COPY");
224 return &elf_howto_table[R_386_COPY];
226 case BFD_RELOC_386_GLOB_DAT:
227 TRACE ("BFD_RELOC_386_GLOB_DAT");
228 return &elf_howto_table[R_386_GLOB_DAT];
230 case BFD_RELOC_386_JUMP_SLOT:
231 TRACE ("BFD_RELOC_386_JUMP_SLOT");
232 return &elf_howto_table[R_386_JUMP_SLOT];
234 case BFD_RELOC_386_RELATIVE:
235 TRACE ("BFD_RELOC_386_RELATIVE");
236 return &elf_howto_table[R_386_RELATIVE];
238 case BFD_RELOC_386_GOTOFF:
239 TRACE ("BFD_RELOC_386_GOTOFF");
240 return &elf_howto_table[R_386_GOTOFF];
242 case BFD_RELOC_386_GOTPC:
243 TRACE ("BFD_RELOC_386_GOTPC");
244 return &elf_howto_table[R_386_GOTPC];
246 /* These relocs are a GNU extension. */
247 case BFD_RELOC_386_TLS_TPOFF:
248 TRACE ("BFD_RELOC_386_TLS_TPOFF");
249 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
251 case BFD_RELOC_386_TLS_IE:
252 TRACE ("BFD_RELOC_386_TLS_IE");
253 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
255 case BFD_RELOC_386_TLS_GOTIE:
256 TRACE ("BFD_RELOC_386_TLS_GOTIE");
257 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
259 case BFD_RELOC_386_TLS_LE:
260 TRACE ("BFD_RELOC_386_TLS_LE");
261 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
263 case BFD_RELOC_386_TLS_GD:
264 TRACE ("BFD_RELOC_386_TLS_GD");
265 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
267 case BFD_RELOC_386_TLS_LDM:
268 TRACE ("BFD_RELOC_386_TLS_LDM");
269 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
272 TRACE ("BFD_RELOC_16");
273 return &elf_howto_table[R_386_16 - R_386_ext_offset];
275 case BFD_RELOC_16_PCREL:
276 TRACE ("BFD_RELOC_16_PCREL");
277 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
280 TRACE ("BFD_RELOC_8");
281 return &elf_howto_table[R_386_8 - R_386_ext_offset];
283 case BFD_RELOC_8_PCREL:
284 TRACE ("BFD_RELOC_8_PCREL");
285 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
287 /* Common with Sun TLS implementation. */
288 case BFD_RELOC_386_TLS_LDO_32:
289 TRACE ("BFD_RELOC_386_TLS_LDO_32");
290 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
292 case BFD_RELOC_386_TLS_IE_32:
293 TRACE ("BFD_RELOC_386_TLS_IE_32");
294 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
296 case BFD_RELOC_386_TLS_LE_32:
297 TRACE ("BFD_RELOC_386_TLS_LE_32");
298 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
300 case BFD_RELOC_386_TLS_DTPMOD32:
301 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
302 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
304 case BFD_RELOC_386_TLS_DTPOFF32:
305 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
306 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
308 case BFD_RELOC_386_TLS_TPOFF32:
309 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
310 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
312 case BFD_RELOC_SIZE32:
313 TRACE ("BFD_RELOC_SIZE32");
314 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
316 case BFD_RELOC_386_TLS_GOTDESC:
317 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
318 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
320 case BFD_RELOC_386_TLS_DESC_CALL:
321 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
322 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
324 case BFD_RELOC_386_TLS_DESC:
325 TRACE ("BFD_RELOC_386_TLS_DESC");
326 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
328 case BFD_RELOC_386_IRELATIVE:
329 TRACE ("BFD_RELOC_386_IRELATIVE");
330 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
332 case BFD_RELOC_386_GOT32X:
333 TRACE ("BFD_RELOC_386_GOT32X");
334 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
336 case BFD_RELOC_VTABLE_INHERIT:
337 TRACE ("BFD_RELOC_VTABLE_INHERIT");
338 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
340 case BFD_RELOC_VTABLE_ENTRY:
341 TRACE ("BFD_RELOC_VTABLE_ENTRY");
342 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
352 static reloc_howto_type *
353 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
358 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
359 if (elf_howto_table[i].name != NULL
360 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
361 return &elf_howto_table[i];
366 static reloc_howto_type *
367 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
371 if ((indx = r_type) >= R_386_standard
372 && ((indx = r_type - R_386_ext_offset) - R_386_standard
373 >= R_386_ext - R_386_standard)
374 && ((indx = r_type - R_386_tls_offset) - R_386_ext
375 >= R_386_ext2 - R_386_ext)
376 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
377 >= R_386_vt - R_386_ext2))
379 /* xgettext:c-format */
380 _bfd_error_handler (_("%B: invalid relocation type %d"),
384 /* PR 17512: file: 0f67f69d. */
385 if (elf_howto_table [indx].type != r_type)
387 return &elf_howto_table[indx];
391 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
393 Elf_Internal_Rela *dst)
395 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
396 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
399 /* Return whether a symbol name implies a local label. The UnixWare
400 2.1 cc generates temporary symbols that start with .X, so we
401 recognize them here. FIXME: do other SVR4 compilers also use .X?.
402 If so, we should move the .X recognition into
403 _bfd_elf_is_local_label_name. */
406 elf_i386_is_local_label_name (bfd *abfd, const char *name)
408 if (name[0] == '.' && name[1] == 'X')
411 return _bfd_elf_is_local_label_name (abfd, name);
414 /* Support for core dump NOTE sections. */
417 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
422 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
424 int pr_version = bfd_get_32 (abfd, note->descdata);
430 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
433 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
437 size = bfd_get_32 (abfd, note->descdata + 8);
441 switch (note->descsz)
446 case 144: /* Linux/i386 */
448 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
451 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
461 /* Make a ".reg/999" section. */
462 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
463 size, note->descpos + offset);
467 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
469 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
471 int pr_version = bfd_get_32 (abfd, note->descdata);
476 elf_tdata (abfd)->core->program
477 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
478 elf_tdata (abfd)->core->command
479 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
483 switch (note->descsz)
488 case 124: /* Linux/i386 elf_prpsinfo. */
489 elf_tdata (abfd)->core->pid
490 = bfd_get_32 (abfd, note->descdata + 12);
491 elf_tdata (abfd)->core->program
492 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
493 elf_tdata (abfd)->core->command
494 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
498 /* Note that for some reason, a spurious space is tacked
499 onto the end of the args in some (at least one anyway)
500 implementations, so strip it off if it exists. */
502 char *command = elf_tdata (abfd)->core->command;
503 int n = strlen (command);
505 if (0 < n && command[n - 1] == ' ')
506 command[n - 1] = '\0';
512 /* Functions for the i386 ELF linker.
514 In order to gain some understanding of code in this file without
515 knowing all the intricate details of the linker, note the
518 Functions named elf_i386_* are called by external routines, other
519 functions are only called locally. elf_i386_* functions appear
520 in this file more or less in the order in which they are called
521 from external routines. eg. elf_i386_check_relocs is called
522 early in the link process, elf_i386_finish_dynamic_sections is
523 one of the last functions. */
525 /* The size in bytes of an entry in the lazy procedure linkage table. */
527 #define LAZY_PLT_ENTRY_SIZE 16
529 /* The size in bytes of an entry in the non-lazy procedure linkage
532 #define NON_LAZY_PLT_ENTRY_SIZE 8
534 /* The first entry in an absolute lazy procedure linkage table looks
535 like this. See the SVR4 ABI i386 supplement to see how this works.
536 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
538 static const bfd_byte elf_i386_lazy_plt0_entry[12] =
540 0xff, 0x35, /* pushl contents of address */
541 0, 0, 0, 0, /* replaced with address of .got + 4. */
542 0xff, 0x25, /* jmp indirect */
543 0, 0, 0, 0 /* replaced with address of .got + 8. */
546 /* Subsequent entries in an absolute lazy procedure linkage table look
549 static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
551 0xff, 0x25, /* jmp indirect */
552 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
553 0x68, /* pushl immediate */
554 0, 0, 0, 0, /* replaced with offset into relocation table. */
555 0xe9, /* jmp relative */
556 0, 0, 0, 0 /* replaced with offset to start of .plt. */
559 /* The first entry in a PIC lazy procedure linkage table look like
560 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
561 lazy_plt->plt0_pad_byte. */
563 static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
565 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
566 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
569 /* Subsequent entries in a PIC lazy procedure linkage table look like
572 static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
574 0xff, 0xa3, /* jmp *offset(%ebx) */
575 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
576 0x68, /* pushl immediate */
577 0, 0, 0, 0, /* replaced with offset into relocation table. */
578 0xe9, /* jmp relative */
579 0, 0, 0, 0 /* replaced with offset to start of .plt. */
582 /* Entries in the non-lazy procedure linkage table look like this. */
584 static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
586 0xff, 0x25, /* jmp indirect */
587 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
588 0x66, 0x90 /* xchg %ax,%ax */
591 /* Entries in the PIC non-lazy procedure linkage table look like
594 static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
596 0xff, 0xa3, /* jmp *offset(%ebx) */
597 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
598 0x66, 0x90 /* xchg %ax,%ax */
601 /* The first entry in an absolute IBT-enabled lazy procedure linkage
602 table looks like this. */
604 static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
606 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
607 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
608 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
611 /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
612 table look like this. Subsequent entries for a PIC IBT-enabled lazy
613 procedure linkage table are the same. */
615 static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
617 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
618 0x68, 0, 0, 0, 0, /* pushl immediate */
619 0xe9, 0, 0, 0, 0, /* jmp relative */
620 0x66, 0x90 /* xchg %ax,%ax */
623 /* The first entry in a PIC IBT-enabled lazy procedure linkage table
626 static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
628 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
629 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
630 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
633 /* Entries for branches with IBT-enabled in the absolute non-lazey
634 procedure linkage table look like this. They have the same size
635 as the lazy PLT entry. */
637 static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
639 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
640 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
641 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
644 /* Entries for branches with IBT-enabled in the PIC non-lazey procedure
645 linkage table look like this. They have the same size as the lazy
648 static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
650 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
651 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
652 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
655 /* .eh_frame covering the lazy .plt section. */
657 static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
659 #define PLT_CIE_LENGTH 20
660 #define PLT_FDE_LENGTH 36
661 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
662 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
663 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
664 0, 0, 0, 0, /* CIE ID */
666 'z', 'R', 0, /* Augmentation string */
667 1, /* Code alignment factor */
668 0x7c, /* Data alignment factor */
669 8, /* Return address column */
670 1, /* Augmentation size */
671 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
672 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
673 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
674 DW_CFA_nop, DW_CFA_nop,
676 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
677 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
678 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
679 0, 0, 0, 0, /* .plt size goes here */
680 0, /* Augmentation size */
681 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
682 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
683 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
684 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
685 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
686 11, /* Block length */
687 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
688 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
689 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
690 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
691 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
694 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
696 static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
698 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
699 0, 0, 0, 0, /* CIE ID */
701 'z', 'R', 0, /* Augmentation string */
702 1, /* Code alignment factor */
703 0x7c, /* Data alignment factor */
704 8, /* Return address column */
705 1, /* Augmentation size */
706 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
707 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
708 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
709 DW_CFA_nop, DW_CFA_nop,
711 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
712 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
713 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
714 0, 0, 0, 0, /* .plt size goes here */
715 0, /* Augmentation size */
716 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
717 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
718 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
719 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
720 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
721 11, /* Block length */
722 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
723 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
724 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
725 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
726 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
729 /* .eh_frame covering the non-lazy .plt section. */
731 static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
733 #define PLT_GOT_FDE_LENGTH 16
734 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
735 0, 0, 0, 0, /* CIE ID */
737 'z', 'R', 0, /* Augmentation string */
738 1, /* Code alignment factor */
739 0x7c, /* Data alignment factor */
740 8, /* Return address column */
741 1, /* Augmentation size */
742 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
743 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
744 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
745 DW_CFA_nop, DW_CFA_nop,
747 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
748 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
749 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
750 0, 0, 0, 0, /* non-lazy .plt size goes here */
751 0, /* Augmentation size */
752 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
755 /* These are the standard parameters. */
756 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
758 elf_i386_lazy_plt0_entry, /* plt0_entry */
759 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
760 elf_i386_lazy_plt_entry, /* plt_entry */
761 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
762 2, /* plt0_got1_offset */
763 8, /* plt0_got2_offset */
764 0, /* plt0_got2_insn_end */
765 2, /* plt_got_offset */
766 7, /* plt_reloc_offset */
767 12, /* plt_plt_offset */
768 0, /* plt_got_insn_size */
769 0, /* plt_plt_insn_end */
770 6, /* plt_lazy_offset */
771 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
772 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
773 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
774 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
777 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
779 elf_i386_non_lazy_plt_entry, /* plt_entry */
780 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
781 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
782 2, /* plt_got_offset */
783 0, /* plt_got_insn_size */
784 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
785 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
788 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
790 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
791 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
792 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
793 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
794 2, /* plt0_got1_offset */
795 8, /* plt0_got2_offset */
796 0, /* plt0_got2_insn_end */
797 4+2, /* plt_got_offset */
798 4+1, /* plt_reloc_offset */
799 4+6, /* plt_plt_offset */
800 0, /* plt_got_insn_size */
801 0, /* plt_plt_insn_end */
802 0, /* plt_lazy_offset */
803 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
804 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
805 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
806 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
809 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
811 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
812 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
813 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
814 4+2, /* plt_got_offset */
815 0, /* plt_got_insn_size */
816 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
817 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
821 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
822 for the PLTResolve stub and then for each PLT entry. */
823 #define PLTRESOLVE_RELOCS_SHLIB 0
824 #define PLTRESOLVE_RELOCS 2
825 #define PLT_NON_JUMP_SLOT_RELOCS 2
827 /* Architecture-specific backend data for i386. */
829 struct elf_i386_backend_data
831 /* Value used to fill the unused bytes of the first PLT entry. */
832 bfd_byte plt0_pad_byte;
843 #define get_elf_i386_backend_data(abfd) \
844 ((const struct elf_i386_backend_data *) \
845 get_elf_backend_data (abfd)->arch_data)
847 /* These are the standard parameters. */
848 static const struct elf_i386_backend_data elf_i386_arch_bed =
850 0, /* plt0_pad_byte */
854 #define elf_backend_arch_data &elf_i386_arch_bed
856 #define is_i386_elf(bfd) \
857 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
858 && elf_tdata (bfd) != NULL \
859 && elf_object_id (bfd) == I386_ELF_DATA)
861 #define elf_i386_compute_jump_table_size(htab) \
862 ((htab)->elf.srelplt->reloc_count * 4)
864 /* Return TRUE if the TLS access code sequence support transition
868 elf_i386_check_tls_transition (asection *sec,
870 Elf_Internal_Shdr *symtab_hdr,
871 struct elf_link_hash_entry **sym_hashes,
873 const Elf_Internal_Rela *rel,
874 const Elf_Internal_Rela *relend)
876 unsigned int val, type, reg;
877 unsigned long r_symndx;
878 struct elf_link_hash_entry *h;
881 bfd_boolean indirect_call;
883 offset = rel->r_offset;
888 if (offset < 2 || (rel + 1) >= relend)
891 indirect_call = FALSE;
892 call = contents + offset + 4;
895 if (r_type == R_386_TLS_GD)
897 /* Check transition from GD access model. Only
898 leal foo@tlsgd(,%ebx,1), %eax
899 call ___tls_get_addr@PLT
901 leal foo@tlsgd(%ebx) %eax
902 call ___tls_get_addr@PLT
905 leal foo@tlsgd(%reg), %eax
906 call *___tls_get_addr@GOT(%reg)
907 which may be converted to
908 addr32 call ___tls_get_addr
909 can transit to different access model. */
910 if ((offset + 10) > sec->size
911 || (type != 0x8d && type != 0x04))
916 /* leal foo@tlsgd(,%ebx,1), %eax
917 call ___tls_get_addr@PLT */
921 if (*(call - 7) != 0x8d
929 leal foo@tlsgd(%ebx), %eax
930 call ___tls_get_addr@PLT
933 leal foo@tlsgd(%reg), %eax
934 call *___tls_get_addr@GOT(%reg)
935 which may be converted to
936 addr32 call ___tls_get_addr
938 %eax can't be used as the GOT base register since it
939 is used to pass parameter to ___tls_get_addr. */
941 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
944 indirect_call = call[0] == 0xff;
945 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
946 && !(call[0] == 0x67 && call[1] == 0xe8)
948 && (call[1] & 0xf8) == 0x90
949 && (call[1] & 0x7) == reg))
955 /* Check transition from LD access model. Only
956 leal foo@tlsldm(%ebx), %eax
957 call ___tls_get_addr@PLT
959 leal foo@tlsldm(%reg), %eax
960 call *___tls_get_addr@GOT(%reg)
961 which may be converted to
962 addr32 call ___tls_get_addr
963 can transit to different access model. */
964 if (type != 0x8d || (offset + 9) > sec->size)
967 /* %eax can't be used as the GOT base register since it is
968 used to pass parameter to ___tls_get_addr. */
970 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
973 indirect_call = call[0] == 0xff;
974 if (!(reg == 3 && call[0] == 0xe8)
975 && !(call[0] == 0x67 && call[1] == 0xe8)
977 && (call[1] & 0xf8) == 0x90
978 && (call[1] & 0x7) == reg))
982 r_symndx = ELF32_R_SYM (rel[1].r_info);
983 if (r_symndx < symtab_hdr->sh_info)
986 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
988 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
990 else if (indirect_call)
991 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
993 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
994 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
997 /* Check transition from IE access model:
998 movl foo@indntpoff(%rip), %eax
999 movl foo@indntpoff(%rip), %reg
1000 addl foo@indntpoff(%rip), %reg
1003 if (offset < 1 || (offset + 4) > sec->size)
1006 /* Check "movl foo@tpoff(%rip), %eax" first. */
1007 val = bfd_get_8 (abfd, contents + offset - 1);
1014 /* Check movl|addl foo@tpoff(%rip), %reg. */
1015 type = bfd_get_8 (abfd, contents + offset - 2);
1016 return ((type == 0x8b || type == 0x03)
1017 && (val & 0xc7) == 0x05);
1019 case R_386_TLS_GOTIE:
1020 case R_386_TLS_IE_32:
1021 /* Check transition from {IE_32,GOTIE} access model:
1022 subl foo@{tpoff,gontoff}(%reg1), %reg2
1023 movl foo@{tpoff,gontoff}(%reg1), %reg2
1024 addl foo@{tpoff,gontoff}(%reg1), %reg2
1027 if (offset < 2 || (offset + 4) > sec->size)
1030 val = bfd_get_8 (abfd, contents + offset - 1);
1031 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1034 type = bfd_get_8 (abfd, contents + offset - 2);
1035 return type == 0x8b || type == 0x2b || type == 0x03;
1037 case R_386_TLS_GOTDESC:
1038 /* Check transition from GDesc access model:
1039 leal x@tlsdesc(%ebx), %eax
1041 Make sure it's a leal adding ebx to a 32-bit offset
1042 into any register, although it's probably almost always
1045 if (offset < 2 || (offset + 4) > sec->size)
1048 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1051 val = bfd_get_8 (abfd, contents + offset - 1);
1052 return (val & 0xc7) == 0x83;
1054 case R_386_TLS_DESC_CALL:
1055 /* Check transition from GDesc access model:
1056 call *x@tlsdesc(%eax)
1058 if (offset + 2 <= sec->size)
1060 /* Make sure that it's a call *x@tlsdesc(%eax). */
1061 call = contents + offset;
1062 return call[0] == 0xff && call[1] == 0x10;
1072 /* Return TRUE if the TLS access transition is OK or no transition
1073 will be performed. Update R_TYPE if there is a transition. */
1076 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1077 asection *sec, bfd_byte *contents,
1078 Elf_Internal_Shdr *symtab_hdr,
1079 struct elf_link_hash_entry **sym_hashes,
1080 unsigned int *r_type, int tls_type,
1081 const Elf_Internal_Rela *rel,
1082 const Elf_Internal_Rela *relend,
1083 struct elf_link_hash_entry *h,
1084 unsigned long r_symndx,
1085 bfd_boolean from_relocate_section)
1087 unsigned int from_type = *r_type;
1088 unsigned int to_type = from_type;
1089 bfd_boolean check = TRUE;
1091 /* Skip TLS transition for functions. */
1093 && (h->type == STT_FUNC
1094 || h->type == STT_GNU_IFUNC))
1100 case R_386_TLS_GOTDESC:
1101 case R_386_TLS_DESC_CALL:
1102 case R_386_TLS_IE_32:
1104 case R_386_TLS_GOTIE:
1105 if (bfd_link_executable (info))
1108 to_type = R_386_TLS_LE_32;
1109 else if (from_type != R_386_TLS_IE
1110 && from_type != R_386_TLS_GOTIE)
1111 to_type = R_386_TLS_IE_32;
1114 /* When we are called from elf_i386_relocate_section, there may
1115 be additional transitions based on TLS_TYPE. */
1116 if (from_relocate_section)
1118 unsigned int new_to_type = to_type;
1120 if (bfd_link_executable (info)
1123 && (tls_type & GOT_TLS_IE))
1124 new_to_type = R_386_TLS_LE_32;
1126 if (to_type == R_386_TLS_GD
1127 || to_type == R_386_TLS_GOTDESC
1128 || to_type == R_386_TLS_DESC_CALL)
1130 if (tls_type == GOT_TLS_IE_POS)
1131 new_to_type = R_386_TLS_GOTIE;
1132 else if (tls_type & GOT_TLS_IE)
1133 new_to_type = R_386_TLS_IE_32;
1136 /* We checked the transition before when we were called from
1137 elf_i386_check_relocs. We only want to check the new
1138 transition which hasn't been checked before. */
1139 check = new_to_type != to_type && from_type == to_type;
1140 to_type = new_to_type;
1146 if (bfd_link_executable (info))
1147 to_type = R_386_TLS_LE_32;
1154 /* Return TRUE if there is no transition. */
1155 if (from_type == to_type)
1158 /* Check if the transition can be performed. */
1160 && ! elf_i386_check_tls_transition (sec, contents,
1161 symtab_hdr, sym_hashes,
1162 from_type, rel, relend))
1164 reloc_howto_type *from, *to;
1167 from = elf_i386_rtype_to_howto (abfd, from_type);
1168 to = elf_i386_rtype_to_howto (abfd, to_type);
1171 name = h->root.root.string;
1174 struct elf_x86_link_hash_table *htab;
1176 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1181 Elf_Internal_Sym *isym;
1183 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1185 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1190 /* xgettext:c-format */
1191 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1192 "in section `%A' failed"),
1193 abfd, from->name, to->name, name,
1194 rel->r_offset, sec);
1195 bfd_set_error (bfd_error_bad_value);
1203 /* With the local symbol, foo, we convert
1204 mov foo@GOT[(%reg1)], %reg2
1206 lea foo[@GOTOFF(%reg1)], %reg2
1208 call/jmp *foo@GOT[(%reg)]
1210 nop call foo/jmp foo nop
1211 When PIC is false, convert
1212 test %reg1, foo@GOT[(%reg2)]
1216 binop foo@GOT[(%reg1)], %reg2
1219 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1224 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1226 Elf_Internal_Rela *irel,
1227 struct elf_link_hash_entry *h,
1228 bfd_boolean *converted,
1229 struct bfd_link_info *link_info)
1231 struct elf_x86_link_hash_table *htab;
1232 unsigned int opcode;
1234 bfd_boolean baseless;
1235 Elf_Internal_Sym *isym;
1236 unsigned int addend;
1240 bfd_boolean to_reloc_32;
1241 unsigned int r_type;
1242 unsigned int r_symndx;
1243 bfd_vma roff = irel->r_offset;
1248 /* Addend for R_386_GOT32X relocations must be 0. */
1249 addend = bfd_get_32 (abfd, contents + roff);
1253 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
1254 is_pic = bfd_link_pic (link_info);
1256 r_type = ELF32_R_TYPE (irel->r_info);
1257 r_symndx = ELF32_R_SYM (irel->r_info);
1259 modrm = bfd_get_8 (abfd, contents + roff - 1);
1260 baseless = (modrm & 0xc7) == 0x5;
1262 if (baseless && is_pic)
1264 /* For PIC, disallow R_386_GOT32X without a base register
1265 since we don't know what the GOT base is. */
1270 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1272 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1275 name = h->root.root.string;
1278 /* xgettext:c-format */
1279 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1280 " register can not be used when making a shared object"),
1285 opcode = bfd_get_8 (abfd, contents + roff - 2);
1287 /* Convert to R_386_32 if PIC is false or there is no base
1289 to_reloc_32 = !is_pic || baseless;
1291 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1295 if (opcode == 0x0ff)
1296 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1297 goto convert_branch;
1299 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1300 "test %reg1, foo@GOT(%reg2)" and
1301 "binop foo@GOT[(%reg1)], %reg2". */
1305 /* Undefined weak symbol is only bound locally in executable
1306 and its reference is resolved as 0. */
1307 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, I386_ELF_DATA, TRUE,
1308 elf_x86_hash_entry (h)))
1312 /* No direct branch to 0 for PIC. */
1316 goto convert_branch;
1320 /* We can convert load of address 0 to R_386_32. */
1328 /* We have "call/jmp *foo@GOT[(%reg)]". */
1329 if ((h->root.type == bfd_link_hash_defined
1330 || h->root.type == bfd_link_hash_defweak)
1331 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1333 /* The function is locally defined. */
1335 /* Convert R_386_GOT32X to R_386_PC32. */
1336 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1338 struct elf_x86_link_hash_entry *eh
1339 = (struct elf_x86_link_hash_entry *) h;
1341 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1344 /* To support TLS optimization, always use addr32 prefix
1345 for "call *___tls_get_addr@GOT(%reg)". */
1346 if (eh && eh->tls_get_addr)
1349 nop_offset = irel->r_offset - 2;
1353 nop = link_info->call_nop_byte;
1354 if (link_info->call_nop_as_suffix)
1356 nop_offset = roff + 3;
1357 irel->r_offset -= 1;
1360 nop_offset = roff - 2;
1365 /* Convert to "jmp foo nop". */
1368 nop_offset = roff + 3;
1369 irel->r_offset -= 1;
1372 bfd_put_8 (abfd, nop, contents + nop_offset);
1373 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1374 /* When converting to PC-relative relocation, we
1375 need to adjust addend by -4. */
1376 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1377 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1384 /* We have "mov foo@GOT[(%re1g)], %reg2",
1385 "test %reg1, foo@GOT(%reg2)" and
1386 "binop foo@GOT[(%reg1)], %reg2".
1388 Avoid optimizing _DYNAMIC since ld.so may use its
1389 link-time address. */
1390 if (h == htab->elf.hdynamic)
1393 /* def_regular is set by an assignment in a linker script in
1394 bfd_elf_record_link_assignment. start_stop is set on
1395 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1398 || h->root.type == bfd_link_hash_defined
1399 || h->root.type == bfd_link_hash_defweak)
1400 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
1407 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1408 "mov $foo, %reg2" with R_386_32. */
1410 modrm = 0xc0 | (modrm & 0x38) >> 3;
1411 bfd_put_8 (abfd, modrm, contents + roff - 1);
1416 /* Convert "mov foo@GOT(%reg1), %reg2" to
1417 "lea foo@GOTOFF(%reg1), %reg2". */
1418 r_type = R_386_GOTOFF;
1424 /* Only R_386_32 is supported. */
1430 /* Convert "test %reg1, foo@GOT(%reg2)" to
1431 "test $foo, %reg1". */
1432 modrm = 0xc0 | (modrm & 0x38) >> 3;
1437 /* Convert "binop foo@GOT(%reg1), %reg2" to
1438 "binop $foo, %reg2". */
1440 | (modrm & 0x38) >> 3
1444 bfd_put_8 (abfd, modrm, contents + roff - 1);
1448 bfd_put_8 (abfd, opcode, contents + roff - 2);
1449 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1458 /* Rename some of the generic section flags to better document how they
1460 #define need_convert_load sec_flg0
1461 #define check_relocs_failed sec_flg1
1463 /* Look through the relocs for a section during the first phase, and
1464 calculate needed space in the global offset table, procedure linkage
1465 table, and dynamic reloc sections. */
1468 elf_i386_check_relocs (bfd *abfd,
1469 struct bfd_link_info *info,
1471 const Elf_Internal_Rela *relocs)
1473 struct elf_x86_link_hash_table *htab;
1474 Elf_Internal_Shdr *symtab_hdr;
1475 struct elf_link_hash_entry **sym_hashes;
1476 const Elf_Internal_Rela *rel;
1477 const Elf_Internal_Rela *rel_end;
1481 if (bfd_link_relocatable (info))
1484 /* Don't do anything special with non-loaded, non-alloced sections.
1485 In particular, any relocs in such sections should not affect GOT
1486 and PLT reference counting (ie. we don't allow them to create GOT
1487 or PLT entries), there's no possibility or desire to optimize TLS
1488 relocs, and there's not much point in propagating relocs to shared
1489 libs that the dynamic linker won't relocate. */
1490 if ((sec->flags & SEC_ALLOC) == 0)
1493 BFD_ASSERT (is_i386_elf (abfd));
1495 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1498 sec->check_relocs_failed = 1;
1502 /* Get the section contents. */
1503 if (elf_section_data (sec)->this_hdr.contents != NULL)
1504 contents = elf_section_data (sec)->this_hdr.contents;
1505 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1507 sec->check_relocs_failed = 1;
1511 symtab_hdr = &elf_symtab_hdr (abfd);
1512 sym_hashes = elf_sym_hashes (abfd);
1516 rel_end = relocs + sec->reloc_count;
1517 for (rel = relocs; rel < rel_end; rel++)
1519 unsigned int r_type;
1520 unsigned int r_symndx;
1521 struct elf_link_hash_entry *h;
1522 struct elf_x86_link_hash_entry *eh;
1523 Elf_Internal_Sym *isym;
1525 bfd_boolean size_reloc;
1527 r_symndx = ELF32_R_SYM (rel->r_info);
1528 r_type = ELF32_R_TYPE (rel->r_info);
1530 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1532 /* xgettext:c-format */
1533 _bfd_error_handler (_("%B: bad symbol index: %d"),
1538 if (r_symndx < symtab_hdr->sh_info)
1540 /* A local symbol. */
1541 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1546 /* Check relocation against local STT_GNU_IFUNC symbol. */
1547 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1549 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
1553 /* Fake a STT_GNU_IFUNC symbol. */
1554 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1556 h->type = STT_GNU_IFUNC;
1559 h->forced_local = 1;
1560 h->root.type = bfd_link_hash_defined;
1568 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1569 while (h->root.type == bfd_link_hash_indirect
1570 || h->root.type == bfd_link_hash_warning)
1571 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1574 eh = (struct elf_x86_link_hash_entry *) h;
1577 if (r_type == R_386_GOTOFF)
1580 /* It is referenced by a non-shared object. */
1582 h->root.non_ir_ref_regular = 1;
1584 if (h->type == STT_GNU_IFUNC)
1585 elf_tdata (info->output_bfd)->has_gnu_symbols
1586 |= elf_gnu_symbol_ifunc;
1589 if (! elf_i386_tls_transition (info, abfd, sec, contents,
1590 symtab_hdr, sym_hashes,
1591 &r_type, GOT_UNKNOWN,
1592 rel, rel_end, h, r_symndx, FALSE))
1598 htab->tls_ld_or_ldm_got.refcount += 1;
1602 /* This symbol requires a procedure linkage table entry. We
1603 actually build the entry in adjust_dynamic_symbol,
1604 because this might be a case of linking PIC code which is
1605 never referenced by a dynamic object, in which case we
1606 don't need to generate a procedure linkage table entry
1609 /* If this is a local symbol, we resolve it directly without
1610 creating a procedure linkage table entry. */
1614 eh->has_got_reloc = 1;
1616 h->plt.refcount += 1;
1623 case R_386_TLS_IE_32:
1625 case R_386_TLS_GOTIE:
1626 if (!bfd_link_executable (info))
1627 info->flags |= DF_STATIC_TLS;
1633 case R_386_TLS_GOTDESC:
1634 case R_386_TLS_DESC_CALL:
1635 /* This symbol requires a global offset table entry. */
1637 int tls_type, old_tls_type;
1644 tls_type = GOT_NORMAL;
1646 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1647 case R_386_TLS_GOTDESC:
1648 case R_386_TLS_DESC_CALL:
1649 tls_type = GOT_TLS_GDESC; break;
1650 case R_386_TLS_IE_32:
1651 if (ELF32_R_TYPE (rel->r_info) == r_type)
1652 tls_type = GOT_TLS_IE_NEG;
1654 /* If this is a GD->IE transition, we may use either of
1655 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1656 tls_type = GOT_TLS_IE;
1659 case R_386_TLS_GOTIE:
1660 tls_type = GOT_TLS_IE_POS; break;
1665 h->got.refcount += 1;
1666 old_tls_type = elf_x86_hash_entry (h)->tls_type;
1670 bfd_signed_vma *local_got_refcounts;
1672 /* This is a global offset table entry for a local symbol. */
1673 local_got_refcounts = elf_local_got_refcounts (abfd);
1674 if (local_got_refcounts == NULL)
1678 size = symtab_hdr->sh_info;
1679 size *= (sizeof (bfd_signed_vma)
1680 + sizeof (bfd_vma) + sizeof(char));
1681 local_got_refcounts = (bfd_signed_vma *)
1682 bfd_zalloc (abfd, size);
1683 if (local_got_refcounts == NULL)
1685 elf_local_got_refcounts (abfd) = local_got_refcounts;
1686 elf_x86_local_tlsdesc_gotent (abfd)
1687 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1688 elf_x86_local_got_tls_type (abfd)
1689 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1691 local_got_refcounts[r_symndx] += 1;
1692 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
1695 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1696 tls_type |= old_tls_type;
1697 /* If a TLS symbol is accessed using IE at least once,
1698 there is no point to use dynamic model for it. */
1699 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1700 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1701 || (tls_type & GOT_TLS_IE) == 0))
1703 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1704 tls_type = old_tls_type;
1705 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1706 && GOT_TLS_GD_ANY_P (tls_type))
1707 tls_type |= old_tls_type;
1711 name = h->root.root.string;
1713 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1716 /* xgettext:c-format */
1717 (_("%B: `%s' accessed both as normal and "
1718 "thread local symbol"),
1720 bfd_set_error (bfd_error_bad_value);
1725 if (old_tls_type != tls_type)
1728 elf_x86_hash_entry (h)->tls_type = tls_type;
1730 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
1738 if (r_type != R_386_TLS_IE)
1741 eh->has_got_reloc = 1;
1746 case R_386_TLS_LE_32:
1749 eh->has_got_reloc = 1;
1750 if (bfd_link_executable (info))
1752 info->flags |= DF_STATIC_TLS;
1757 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1758 eh->has_non_got_reloc = 1;
1760 /* We are called after all symbols have been resolved. Only
1761 relocation against STT_GNU_IFUNC symbol must go through
1764 && (bfd_link_executable (info)
1765 || h->type == STT_GNU_IFUNC))
1767 /* If this reloc is in a read-only section, we might
1768 need a copy reloc. We can't check reliably at this
1769 stage whether the section is read-only, as input
1770 sections have not yet been mapped to output sections.
1771 Tentatively set the flag for now, and correct in
1772 adjust_dynamic_symbol. */
1775 /* We may need a .plt entry if the symbol is a function
1776 defined in a shared lib or is a STT_GNU_IFUNC function
1777 referenced from the code or read-only section. */
1779 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1780 h->plt.refcount += 1;
1782 if (r_type == R_386_PC32)
1784 /* Since something like ".long foo - ." may be used
1785 as pointer, make sure that PLT is used if foo is
1786 a function defined in a shared library. */
1787 if ((sec->flags & SEC_CODE) == 0)
1788 h->pointer_equality_needed = 1;
1789 else if (h->type == STT_GNU_IFUNC
1790 && bfd_link_pic (info))
1793 /* xgettext:c-format */
1794 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
1795 abfd, h->root.root.string);
1796 bfd_set_error (bfd_error_bad_value);
1802 h->pointer_equality_needed = 1;
1803 /* R_386_32 can be resolved at run-time. */
1804 if (r_type == R_386_32
1805 && (sec->flags & SEC_READONLY) == 0)
1806 eh->func_pointer_refcount += 1;
1812 /* If we are creating a shared library, and this is a reloc
1813 against a global symbol, or a non PC relative reloc
1814 against a local symbol, then we need to copy the reloc
1815 into the shared library. However, if we are linking with
1816 -Bsymbolic, we do not need to copy a reloc against a
1817 global symbol which is defined in an object we are
1818 including in the link (i.e., DEF_REGULAR is set). At
1819 this point we have not seen all the input files, so it is
1820 possible that DEF_REGULAR is not set now but will be set
1821 later (it is never cleared). In case of a weak definition,
1822 DEF_REGULAR may be cleared later by a strong definition in
1823 a shared library. We account for that possibility below by
1824 storing information in the relocs_copied field of the hash
1825 table entry. A similar situation occurs when creating
1826 shared libraries and symbol visibility changes render the
1829 If on the other hand, we are creating an executable, we
1830 may need to keep relocations for symbols satisfied by a
1831 dynamic library if we manage to avoid copy relocs for the
1834 Generate dynamic pointer relocation against STT_GNU_IFUNC
1835 symbol in the non-code section. */
1836 if ((bfd_link_pic (info)
1837 && (r_type != R_386_PC32
1839 && (! (bfd_link_pie (info)
1840 || SYMBOLIC_BIND (info, h))
1841 || h->root.type == bfd_link_hash_defweak
1842 || !h->def_regular))))
1844 && h->type == STT_GNU_IFUNC
1845 && r_type == R_386_32
1846 && (sec->flags & SEC_CODE) == 0)
1847 || (ELIMINATE_COPY_RELOCS
1848 && !bfd_link_pic (info)
1850 && (h->root.type == bfd_link_hash_defweak
1851 || !h->def_regular)))
1853 struct elf_dyn_relocs *p;
1854 struct elf_dyn_relocs **head;
1856 /* We must copy these reloc types into the output file.
1857 Create a reloc section in dynobj and make room for
1861 sreloc = _bfd_elf_make_dynamic_reloc_section
1862 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1868 /* If this is a global symbol, we count the number of
1869 relocations we need for this symbol. */
1872 head = &eh->dyn_relocs;
1876 /* Track dynamic relocs needed for local syms too.
1877 We really need local syms available to do this
1882 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1887 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1891 vpp = &elf_section_data (s)->local_dynrel;
1892 head = (struct elf_dyn_relocs **)vpp;
1896 if (p == NULL || p->sec != sec)
1898 bfd_size_type amt = sizeof *p;
1899 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1911 /* Count size relocation as PC-relative relocation. */
1912 if (r_type == R_386_PC32 || size_reloc)
1917 /* This relocation describes the C++ object vtable hierarchy.
1918 Reconstruct it for later use during GC. */
1919 case R_386_GNU_VTINHERIT:
1920 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1924 /* This relocation describes which C++ vtable entries are actually
1925 used. Record for later use during GC. */
1926 case R_386_GNU_VTENTRY:
1927 BFD_ASSERT (h != NULL);
1929 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1937 if (r_type == R_386_GOT32X
1938 && (h == NULL || h->type != STT_GNU_IFUNC))
1939 sec->need_convert_load = 1;
1942 if (elf_section_data (sec)->this_hdr.contents != contents)
1944 if (!info->keep_memory)
1948 /* Cache the section contents for elf_link_input_bfd. */
1949 elf_section_data (sec)->this_hdr.contents = contents;
1956 if (elf_section_data (sec)->this_hdr.contents != contents)
1958 sec->check_relocs_failed = 1;
1962 /* Allocate space in .plt, .got and associated reloc sections for
1966 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1968 struct bfd_link_info *info;
1969 struct elf_x86_link_hash_table *htab;
1970 struct elf_x86_link_hash_entry *eh;
1971 struct elf_dyn_relocs *p;
1972 unsigned plt_entry_size;
1973 bfd_boolean resolved_to_zero;
1975 if (h->root.type == bfd_link_hash_indirect)
1978 eh = (struct elf_x86_link_hash_entry *) h;
1980 info = (struct bfd_link_info *) inf;
1981 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1985 plt_entry_size = htab->plt.plt_entry_size;
1987 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
1992 /* Clear the reference count of function pointer relocations if
1993 symbol isn't a normal function. */
1994 if (h->type != STT_FUNC)
1995 eh->func_pointer_refcount = 0;
1997 /* We can't use the GOT PLT if pointer equality is needed since
1998 finish_dynamic_symbol won't clear symbol value and the dynamic
1999 linker won't update the GOT slot. We will get into an infinite
2000 loop at run-time. */
2001 if (htab->plt_got != NULL
2002 && h->type != STT_GNU_IFUNC
2003 && !h->pointer_equality_needed
2004 && h->plt.refcount > 0
2005 && h->got.refcount > 0)
2007 /* Don't use the regular PLT if there are both GOT and GOTPLT
2009 h->plt.offset = (bfd_vma) -1;
2011 /* Use the GOT PLT. */
2012 eh->plt_got.refcount = 1;
2015 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2016 here if it is defined and referenced in a non-shared object. */
2017 if (h->type == STT_GNU_IFUNC
2020 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2021 &htab->readonly_dynrelocs_against_ifunc,
2027 asection *s = htab->plt_second;
2028 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2030 /* Use the second PLT section if it is created. */
2031 eh->plt_second.offset = s->size;
2033 /* Make room for this entry in the second PLT section. */
2034 s->size += htab->non_lazy_plt->plt_entry_size;
2042 /* Don't create the PLT entry if there are only function pointer
2043 relocations which can be resolved at run-time. */
2044 else if (htab->elf.dynamic_sections_created
2045 && (h->plt.refcount > eh->func_pointer_refcount
2046 || eh->plt_got.refcount > 0))
2048 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
2050 /* Clear the reference count of function pointer relocations
2052 eh->func_pointer_refcount = 0;
2054 /* Make sure this symbol is output as a dynamic symbol.
2055 Undefined weak syms won't yet be marked as dynamic. */
2056 if (h->dynindx == -1
2058 && !resolved_to_zero
2059 && h->root.type == bfd_link_hash_undefweak)
2061 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2065 if (bfd_link_pic (info)
2066 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2068 asection *s = htab->elf.splt;
2069 asection *second_s = htab->plt_second;
2070 asection *got_s = htab->plt_got;
2072 /* If this is the first .plt entry, make room for the special
2073 first entry. The .plt section is used by prelink to undo
2074 prelinking for dynamic relocations. */
2076 s->size = htab->plt.has_plt0 * plt_entry_size;
2079 eh->plt_got.offset = got_s->size;
2082 h->plt.offset = s->size;
2084 eh->plt_second.offset = second_s->size;
2087 /* If this symbol is not defined in a regular file, and we are
2088 not generating a shared library, then set the symbol to this
2089 location in the .plt. This is required to make function
2090 pointers compare as equal between the normal executable and
2091 the shared library. */
2092 if (! bfd_link_pic (info)
2097 /* We need to make a call to the entry of the GOT PLT
2098 instead of regular PLT entry. */
2099 h->root.u.def.section = got_s;
2100 h->root.u.def.value = eh->plt_got.offset;
2106 /* We need to make a call to the entry of the
2107 second PLT instead of regular PLT entry. */
2108 h->root.u.def.section = second_s;
2109 h->root.u.def.value = eh->plt_second.offset;
2113 h->root.u.def.section = s;
2114 h->root.u.def.value = h->plt.offset;
2119 /* Make room for this entry. */
2121 got_s->size += htab->non_lazy_plt->plt_entry_size;
2124 s->size += plt_entry_size;
2126 second_s->size += htab->non_lazy_plt->plt_entry_size;
2128 /* We also need to make an entry in the .got.plt section,
2129 which will be placed in the .got section by the linker
2131 htab->elf.sgotplt->size += 4;
2133 /* There should be no PLT relocation against resolved
2134 undefined weak symbol in executable. */
2135 if (!resolved_to_zero)
2137 /* We also need to make an entry in the .rel.plt
2139 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2140 htab->elf.srelplt->reloc_count++;
2144 if (htab->is_vxworks && !bfd_link_pic (info))
2146 /* VxWorks has a second set of relocations for each PLT entry
2147 in executables. They go in a separate relocation section,
2148 which is processed by the kernel loader. */
2150 /* There are two relocations for the initial PLT entry: an
2151 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2152 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2154 asection *srelplt2 = htab->srelplt2;
2155 if (h->plt.offset == plt_entry_size)
2156 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2158 /* There are two extra relocations for each subsequent PLT entry:
2159 an R_386_32 relocation for the GOT entry, and an R_386_32
2160 relocation for the PLT entry. */
2162 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2167 eh->plt_got.offset = (bfd_vma) -1;
2168 h->plt.offset = (bfd_vma) -1;
2174 eh->plt_got.offset = (bfd_vma) -1;
2175 h->plt.offset = (bfd_vma) -1;
2179 eh->tlsdesc_got = (bfd_vma) -1;
2181 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2182 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2183 if (h->got.refcount > 0
2184 && bfd_link_executable (info)
2186 && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE))
2187 h->got.offset = (bfd_vma) -1;
2188 else if (h->got.refcount > 0)
2192 int tls_type = elf_x86_hash_entry (h)->tls_type;
2194 /* Make sure this symbol is output as a dynamic symbol.
2195 Undefined weak syms won't yet be marked as dynamic. */
2196 if (h->dynindx == -1
2198 && !resolved_to_zero
2199 && h->root.type == bfd_link_hash_undefweak)
2201 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2206 if (GOT_TLS_GDESC_P (tls_type))
2208 eh->tlsdesc_got = htab->elf.sgotplt->size
2209 - elf_i386_compute_jump_table_size (htab);
2210 htab->elf.sgotplt->size += 8;
2211 h->got.offset = (bfd_vma) -2;
2213 if (! GOT_TLS_GDESC_P (tls_type)
2214 || GOT_TLS_GD_P (tls_type))
2216 h->got.offset = s->size;
2218 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2219 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2222 dyn = htab->elf.dynamic_sections_created;
2223 /* R_386_TLS_IE_32 needs one dynamic relocation,
2224 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2225 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2226 need two), R_386_TLS_GD needs one if local symbol and two if
2227 global. No dynamic relocation against resolved undefined weak
2228 symbol in executable. */
2229 if (tls_type == GOT_TLS_IE_BOTH)
2230 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2231 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2232 || (tls_type & GOT_TLS_IE))
2233 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2234 else if (GOT_TLS_GD_P (tls_type))
2235 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2236 else if (! GOT_TLS_GDESC_P (tls_type)
2237 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2238 && !resolved_to_zero)
2239 || h->root.type != bfd_link_hash_undefweak)
2240 && (bfd_link_pic (info)
2241 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2242 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2243 if (GOT_TLS_GDESC_P (tls_type))
2244 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2247 h->got.offset = (bfd_vma) -1;
2249 if (eh->dyn_relocs == NULL)
2252 /* In the shared -Bsymbolic case, discard space allocated for
2253 dynamic pc-relative relocs against symbols which turn out to be
2254 defined in regular objects. For the normal shared case, discard
2255 space for pc-relative relocs that have become local due to symbol
2256 visibility changes. */
2258 if (bfd_link_pic (info))
2260 /* The only reloc that uses pc_count is R_386_PC32, which will
2261 appear on a call or on something like ".long foo - .". We
2262 want calls to protected symbols to resolve directly to the
2263 function rather than going via the plt. If people want
2264 function pointer comparisons to work as expected then they
2265 should avoid writing assembly like ".long foo - .". */
2266 if (SYMBOL_CALLS_LOCAL (info, h))
2268 struct elf_dyn_relocs **pp;
2270 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2272 p->count -= p->pc_count;
2281 if (htab->is_vxworks)
2283 struct elf_dyn_relocs **pp;
2284 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2286 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2293 /* Also discard relocs on undefined weak syms with non-default
2294 visibility or in PIE. */
2295 if (eh->dyn_relocs != NULL
2296 && h->root.type == bfd_link_hash_undefweak)
2298 /* Undefined weak symbol is never bound locally in shared
2300 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2301 || resolved_to_zero)
2305 /* Keep dynamic non-GOT/non-PLT relocation so that we
2306 can branch to 0 without PLT. */
2307 struct elf_dyn_relocs **pp;
2309 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2310 if (p->pc_count == 0)
2314 /* Remove non-R_386_PC32 relocation. */
2315 p->count = p->pc_count;
2319 if (eh->dyn_relocs != NULL)
2321 /* Make sure undefined weak symbols are output
2322 as dynamic symbols in PIEs for dynamic non-GOT
2323 non-PLT reloations. */
2324 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2329 eh->dyn_relocs = NULL;
2331 else if (h->dynindx == -1
2332 && !h->forced_local)
2334 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2339 else if (ELIMINATE_COPY_RELOCS)
2341 /* For the non-shared case, discard space for relocs against
2342 symbols which turn out to need copy relocs or are not
2343 dynamic. Keep dynamic relocations for run-time function
2344 pointer initialization. */
2346 if ((!h->non_got_ref
2347 || eh->func_pointer_refcount > 0
2348 || (h->root.type == bfd_link_hash_undefweak
2349 && !resolved_to_zero))
2352 || (htab->elf.dynamic_sections_created
2353 && (h->root.type == bfd_link_hash_undefweak
2354 || h->root.type == bfd_link_hash_undefined))))
2356 /* Make sure this symbol is output as a dynamic symbol.
2357 Undefined weak syms won't yet be marked as dynamic. */
2358 if (h->dynindx == -1
2360 && !resolved_to_zero
2361 && h->root.type == bfd_link_hash_undefweak)
2363 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2367 /* If that succeeded, we know we'll be keeping all the
2369 if (h->dynindx != -1)
2373 eh->dyn_relocs = NULL;
2374 eh->func_pointer_refcount = 0;
2379 /* Finally, allocate space. */
2380 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2384 sreloc = elf_section_data (p->sec)->sreloc;
2386 BFD_ASSERT (sreloc != NULL);
2387 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2393 /* Allocate space in .plt, .got and associated reloc sections for
2394 local dynamic relocs. */
2397 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2399 struct elf_link_hash_entry *h
2400 = (struct elf_link_hash_entry *) *slot;
2402 if (h->type != STT_GNU_IFUNC
2406 || h->root.type != bfd_link_hash_defined)
2409 return elf_i386_allocate_dynrelocs (h, inf);
2412 /* Convert load via the GOT slot to load immediate. */
2415 elf_i386_convert_load (bfd *abfd, asection *sec,
2416 struct bfd_link_info *link_info)
2418 struct elf_x86_link_hash_table *htab;
2419 Elf_Internal_Shdr *symtab_hdr;
2420 Elf_Internal_Rela *internal_relocs;
2421 Elf_Internal_Rela *irel, *irelend;
2423 bfd_boolean changed;
2424 bfd_signed_vma *local_got_refcounts;
2426 /* Don't even try to convert non-ELF outputs. */
2427 if (!is_elf_hash_table (link_info->hash))
2430 /* Nothing to do if there is no need or no output. */
2431 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2432 || sec->need_convert_load == 0
2433 || bfd_is_abs_section (sec->output_section))
2436 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2438 /* Load the relocations for this section. */
2439 internal_relocs = (_bfd_elf_link_read_relocs
2440 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2441 link_info->keep_memory));
2442 if (internal_relocs == NULL)
2446 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
2447 local_got_refcounts = elf_local_got_refcounts (abfd);
2449 /* Get the section contents. */
2450 if (elf_section_data (sec)->this_hdr.contents != NULL)
2451 contents = elf_section_data (sec)->this_hdr.contents;
2454 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2458 irelend = internal_relocs + sec->reloc_count;
2459 for (irel = internal_relocs; irel < irelend; irel++)
2461 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2462 unsigned int r_symndx;
2463 struct elf_link_hash_entry *h;
2464 bfd_boolean converted;
2466 /* Don't convert R_386_GOT32 since we can't tell if it is applied
2467 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
2468 if (r_type != R_386_GOT32X)
2471 r_symndx = ELF32_R_SYM (irel->r_info);
2472 if (r_symndx < symtab_hdr->sh_info)
2473 h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
2474 (const Elf_Internal_Rela *) irel,
2478 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
2479 while (h->root.type == bfd_link_hash_indirect
2480 || h->root.type == bfd_link_hash_warning)
2481 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2484 /* STT_GNU_IFUNC must keep GOT32 relocations. */
2485 if (h != NULL && h->type == STT_GNU_IFUNC)
2489 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
2490 irel, h, &converted, link_info))
2495 changed = converted;
2498 if (h->got.refcount > 0)
2499 h->got.refcount -= 1;
2503 if (local_got_refcounts != NULL
2504 && local_got_refcounts[r_symndx] > 0)
2505 local_got_refcounts[r_symndx] -= 1;
2510 if (contents != NULL
2511 && elf_section_data (sec)->this_hdr.contents != contents)
2513 if (!changed && !link_info->keep_memory)
2517 /* Cache the section contents for elf_link_input_bfd. */
2518 elf_section_data (sec)->this_hdr.contents = contents;
2522 if (elf_section_data (sec)->relocs != internal_relocs)
2525 free (internal_relocs);
2527 elf_section_data (sec)->relocs = internal_relocs;
2533 if (contents != NULL
2534 && elf_section_data (sec)->this_hdr.contents != contents)
2536 if (internal_relocs != NULL
2537 && elf_section_data (sec)->relocs != internal_relocs)
2538 free (internal_relocs);
2542 /* Set the sizes of the dynamic sections. */
2545 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2547 struct elf_x86_link_hash_table *htab;
2553 htab = elf_x86_hash_table (info, I386_ELF_DATA);
2556 dynobj = htab->elf.dynobj;
2560 /* Set up .got offsets for local syms, and space for local dynamic
2562 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2564 bfd_signed_vma *local_got;
2565 bfd_signed_vma *end_local_got;
2566 char *local_tls_type;
2567 bfd_vma *local_tlsdesc_gotent;
2568 bfd_size_type locsymcount;
2569 Elf_Internal_Shdr *symtab_hdr;
2572 if (! is_i386_elf (ibfd))
2575 for (s = ibfd->sections; s != NULL; s = s->next)
2577 struct elf_dyn_relocs *p;
2579 if (!elf_i386_convert_load (ibfd, s, info))
2582 for (p = ((struct elf_dyn_relocs *)
2583 elf_section_data (s)->local_dynrel);
2587 if (!bfd_is_abs_section (p->sec)
2588 && bfd_is_abs_section (p->sec->output_section))
2590 /* Input section has been discarded, either because
2591 it is a copy of a linkonce section or due to
2592 linker script /DISCARD/, so we'll be discarding
2595 else if (htab->is_vxworks
2596 && strcmp (p->sec->output_section->name,
2599 /* Relocations in vxworks .tls_vars sections are
2600 handled specially by the loader. */
2602 else if (p->count != 0)
2604 srel = elf_section_data (p->sec)->sreloc;
2605 srel->size += p->count * sizeof (Elf32_External_Rel);
2606 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2607 && (info->flags & DF_TEXTREL) == 0)
2609 info->flags |= DF_TEXTREL;
2610 if ((info->warn_shared_textrel && bfd_link_pic (info))
2611 || info->error_textrel)
2612 /* xgettext:c-format */
2613 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2614 p->sec->owner, p->sec);
2620 local_got = elf_local_got_refcounts (ibfd);
2624 symtab_hdr = &elf_symtab_hdr (ibfd);
2625 locsymcount = symtab_hdr->sh_info;
2626 end_local_got = local_got + locsymcount;
2627 local_tls_type = elf_x86_local_got_tls_type (ibfd);
2628 local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd);
2630 srel = htab->elf.srelgot;
2631 for (; local_got < end_local_got;
2632 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2634 *local_tlsdesc_gotent = (bfd_vma) -1;
2637 if (GOT_TLS_GDESC_P (*local_tls_type))
2639 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2640 - elf_i386_compute_jump_table_size (htab);
2641 htab->elf.sgotplt->size += 8;
2642 *local_got = (bfd_vma) -2;
2644 if (! GOT_TLS_GDESC_P (*local_tls_type)
2645 || GOT_TLS_GD_P (*local_tls_type))
2647 *local_got = s->size;
2649 if (GOT_TLS_GD_P (*local_tls_type)
2650 || *local_tls_type == GOT_TLS_IE_BOTH)
2653 if (bfd_link_pic (info)
2654 || GOT_TLS_GD_ANY_P (*local_tls_type)
2655 || (*local_tls_type & GOT_TLS_IE))
2657 if (*local_tls_type == GOT_TLS_IE_BOTH)
2658 srel->size += 2 * sizeof (Elf32_External_Rel);
2659 else if (GOT_TLS_GD_P (*local_tls_type)
2660 || ! GOT_TLS_GDESC_P (*local_tls_type))
2661 srel->size += sizeof (Elf32_External_Rel);
2662 if (GOT_TLS_GDESC_P (*local_tls_type))
2663 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2667 *local_got = (bfd_vma) -1;
2671 if (htab->tls_ld_or_ldm_got.refcount > 0)
2673 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2675 htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size;
2676 htab->elf.sgot->size += 8;
2677 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2680 htab->tls_ld_or_ldm_got.offset = -1;
2682 /* Allocate global sym .plt and .got entries, and space for global
2683 sym dynamic relocs. */
2684 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2686 /* Allocate .plt and .got entries, and space for local symbols. */
2687 htab_traverse (htab->loc_hash_table,
2688 elf_i386_allocate_local_dynrelocs,
2691 /* For every jump slot reserved in the sgotplt, reloc_count is
2692 incremented. However, when we reserve space for TLS descriptors,
2693 it's not incremented, so in order to compute the space reserved
2694 for them, it suffices to multiply the reloc count by the jump
2697 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2698 so that R_386_IRELATIVE entries come last. */
2699 if (htab->elf.srelplt)
2701 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2702 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2703 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2705 else if (htab->elf.irelplt)
2706 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2709 if (htab->elf.sgotplt)
2711 /* Don't allocate .got.plt section if there are no GOT nor PLT
2712 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2713 if ((htab->elf.hgot == NULL
2714 || !htab->elf.hgot->ref_regular_nonweak)
2715 && (htab->elf.sgotplt->size
2716 == get_elf_backend_data (output_bfd)->got_header_size)
2717 && (htab->elf.splt == NULL
2718 || htab->elf.splt->size == 0)
2719 && (htab->elf.sgot == NULL
2720 || htab->elf.sgot->size == 0)
2721 && (htab->elf.iplt == NULL
2722 || htab->elf.iplt->size == 0)
2723 && (htab->elf.igotplt == NULL
2724 || htab->elf.igotplt->size == 0))
2725 htab->elf.sgotplt->size = 0;
2728 if (_bfd_elf_eh_frame_present (info))
2730 if (htab->plt_eh_frame != NULL
2731 && htab->elf.splt != NULL
2732 && htab->elf.splt->size != 0
2733 && !bfd_is_abs_section (htab->elf.splt->output_section))
2734 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
2736 if (htab->plt_got_eh_frame != NULL
2737 && htab->plt_got != NULL
2738 && htab->plt_got->size != 0
2739 && !bfd_is_abs_section (htab->plt_got->output_section))
2740 htab->plt_got_eh_frame->size
2741 = htab->non_lazy_plt->eh_frame_plt_size;
2743 /* Unwind info for the second PLT and .plt.got sections are
2745 if (htab->plt_second_eh_frame != NULL
2746 && htab->plt_second != NULL
2747 && htab->plt_second->size != 0
2748 && !bfd_is_abs_section (htab->plt_second->output_section))
2749 htab->plt_second_eh_frame->size
2750 = htab->non_lazy_plt->eh_frame_plt_size;
2753 /* We now have determined the sizes of the various dynamic sections.
2754 Allocate memory for them. */
2756 for (s = dynobj->sections; s != NULL; s = s->next)
2758 bfd_boolean strip_section = TRUE;
2760 if ((s->flags & SEC_LINKER_CREATED) == 0)
2763 if (s == htab->elf.splt
2764 || s == htab->elf.sgot)
2766 /* Strip this section if we don't need it; see the
2768 /* We'd like to strip these sections if they aren't needed, but if
2769 we've exported dynamic symbols from them we must leave them.
2770 It's too late to tell BFD to get rid of the symbols. */
2772 if (htab->elf.hplt != NULL)
2773 strip_section = FALSE;
2775 else if (s == htab->elf.sgotplt
2776 || s == htab->elf.iplt
2777 || s == htab->elf.igotplt
2778 || s == htab->plt_second
2779 || s == htab->plt_got
2780 || s == htab->plt_eh_frame
2781 || s == htab->plt_got_eh_frame
2782 || s == htab->plt_second_eh_frame
2783 || s == htab->elf.sdynbss
2784 || s == htab->elf.sdynrelro)
2786 /* Strip these too. */
2788 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2791 && s != htab->elf.srelplt
2792 && s != htab->srelplt2)
2795 /* We use the reloc_count field as a counter if we need
2796 to copy relocs into the output file. */
2801 /* It's not one of our sections, so don't allocate space. */
2807 /* If we don't need this section, strip it from the
2808 output file. This is mostly to handle .rel.bss and
2809 .rel.plt. We must create both sections in
2810 create_dynamic_sections, because they must be created
2811 before the linker maps input sections to output
2812 sections. The linker does that before
2813 adjust_dynamic_symbol is called, and it is that
2814 function which decides whether anything needs to go
2815 into these sections. */
2817 s->flags |= SEC_EXCLUDE;
2821 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2824 /* Allocate memory for the section contents. We use bfd_zalloc
2825 here in case unused entries are not reclaimed before the
2826 section's contents are written out. This should not happen,
2827 but this way if it does, we get a R_386_NONE reloc instead
2829 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2830 if (s->contents == NULL)
2834 if (htab->plt_eh_frame != NULL
2835 && htab->plt_eh_frame->contents != NULL)
2837 memcpy (htab->plt_eh_frame->contents,
2838 htab->plt.eh_frame_plt,
2839 htab->plt_eh_frame->size);
2840 bfd_put_32 (dynobj, htab->elf.splt->size,
2841 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2844 if (htab->plt_got_eh_frame != NULL
2845 && htab->plt_got_eh_frame->contents != NULL)
2847 memcpy (htab->plt_got_eh_frame->contents,
2848 htab->non_lazy_plt->eh_frame_plt,
2849 htab->plt_got_eh_frame->size);
2850 bfd_put_32 (dynobj, htab->plt_got->size,
2851 (htab->plt_got_eh_frame->contents
2852 + PLT_FDE_LEN_OFFSET));
2855 if (htab->plt_second_eh_frame != NULL
2856 && htab->plt_second_eh_frame->contents != NULL)
2858 memcpy (htab->plt_second_eh_frame->contents,
2859 htab->non_lazy_plt->eh_frame_plt,
2860 htab->plt_second_eh_frame->size);
2861 bfd_put_32 (dynobj, htab->plt_second->size,
2862 (htab->plt_second_eh_frame->contents
2863 + PLT_FDE_LEN_OFFSET));
2866 if (htab->elf.dynamic_sections_created)
2868 /* Add some entries to the .dynamic section. We fill in the
2869 values later, in elf_i386_finish_dynamic_sections, but we
2870 must add the entries now so that we get the correct size for
2871 the .dynamic section. The DT_DEBUG entry is filled in by the
2872 dynamic linker and used by the debugger. */
2873 #define add_dynamic_entry(TAG, VAL) \
2874 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2876 if (bfd_link_executable (info))
2878 if (!add_dynamic_entry (DT_DEBUG, 0))
2882 if (htab->elf.splt->size != 0)
2884 /* DT_PLTGOT is used by prelink even if there is no PLT
2886 if (!add_dynamic_entry (DT_PLTGOT, 0))
2890 if (htab->elf.srelplt->size != 0)
2892 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2893 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2894 || !add_dynamic_entry (DT_JMPREL, 0))
2900 if (!add_dynamic_entry (DT_REL, 0)
2901 || !add_dynamic_entry (DT_RELSZ, 0)
2902 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2905 /* If any dynamic relocs apply to a read-only section,
2906 then we need a DT_TEXTREL entry. */
2907 if ((info->flags & DF_TEXTREL) == 0)
2908 elf_link_hash_traverse (&htab->elf,
2909 _bfd_x86_elf_readonly_dynrelocs,
2912 if ((info->flags & DF_TEXTREL) != 0)
2914 if (htab->readonly_dynrelocs_against_ifunc)
2916 info->callbacks->einfo
2917 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
2918 bfd_set_error (bfd_error_bad_value);
2922 if (!add_dynamic_entry (DT_TEXTREL, 0))
2926 if (htab->is_vxworks
2927 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2930 #undef add_dynamic_entry
2935 /* Set the correct type for an x86 ELF section. We do this by the
2936 section name, which is a hack, but ought to work. */
2939 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2940 Elf_Internal_Shdr *hdr,
2945 name = bfd_get_section_name (abfd, sec);
2947 /* This is an ugly, but unfortunately necessary hack that is
2948 needed when producing EFI binaries on x86. It tells
2949 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2950 containing ELF relocation info. We need this hack in order to
2951 be able to generate ELF binaries that can be translated into
2952 EFI applications (which are essentially COFF objects). Those
2953 files contain a COFF ".reloc" section inside an ELFNN object,
2954 which would normally cause BFD to segfault because it would
2955 attempt to interpret this section as containing relocation
2956 entries for section "oc". With this hack enabled, ".reloc"
2957 will be treated as a normal data section, which will avoid the
2958 segfault. However, you won't be able to create an ELFNN binary
2959 with a section named "oc" that needs relocations, but that's
2960 the kind of ugly side-effects you get when detecting section
2961 types based on their names... In practice, this limitation is
2962 unlikely to bite. */
2963 if (strcmp (name, ".reloc") == 0)
2964 hdr->sh_type = SHT_PROGBITS;
2969 /* Return the relocation value for @tpoff relocation
2970 if STT_TLS virtual address is ADDRESS. */
2973 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2975 struct elf_link_hash_table *htab = elf_hash_table (info);
2976 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2977 bfd_vma static_tls_size;
2979 /* If tls_sec is NULL, we should have signalled an error already. */
2980 if (htab->tls_sec == NULL)
2983 /* Consider special static TLS alignment requirements. */
2984 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2985 return static_tls_size + htab->tls_sec->vma - address;
2988 /* Relocate an i386 ELF section. */
2991 elf_i386_relocate_section (bfd *output_bfd,
2992 struct bfd_link_info *info,
2994 asection *input_section,
2996 Elf_Internal_Rela *relocs,
2997 Elf_Internal_Sym *local_syms,
2998 asection **local_sections)
3000 struct elf_x86_link_hash_table *htab;
3001 Elf_Internal_Shdr *symtab_hdr;
3002 struct elf_link_hash_entry **sym_hashes;
3003 bfd_vma *local_got_offsets;
3004 bfd_vma *local_tlsdesc_gotents;
3005 Elf_Internal_Rela *rel;
3006 Elf_Internal_Rela *wrel;
3007 Elf_Internal_Rela *relend;
3008 bfd_boolean is_vxworks_tls;
3009 unsigned plt_entry_size;
3011 BFD_ASSERT (is_i386_elf (input_bfd));
3013 /* Skip if check_relocs failed. */
3014 if (input_section->check_relocs_failed)
3017 htab = elf_x86_hash_table (info, I386_ELF_DATA);
3020 symtab_hdr = &elf_symtab_hdr (input_bfd);
3021 sym_hashes = elf_sym_hashes (input_bfd);
3022 local_got_offsets = elf_local_got_offsets (input_bfd);
3023 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3024 /* We have to handle relocations in vxworks .tls_vars sections
3025 specially, because the dynamic loader is 'weird'. */
3026 is_vxworks_tls = (htab->is_vxworks
3027 && bfd_link_pic (info)
3028 && !strcmp (input_section->output_section->name,
3031 _bfd_x86_elf_set_tls_module_base (info);
3033 plt_entry_size = htab->plt.plt_entry_size;
3035 rel = wrel = relocs;
3036 relend = relocs + input_section->reloc_count;
3037 for (; rel < relend; wrel++, rel++)
3039 unsigned int r_type;
3040 reloc_howto_type *howto;
3041 unsigned long r_symndx;
3042 struct elf_link_hash_entry *h;
3043 struct elf_x86_link_hash_entry *eh;
3044 Elf_Internal_Sym *sym;
3046 bfd_vma off, offplt, plt_offset;
3048 bfd_boolean unresolved_reloc;
3049 bfd_reloc_status_type r;
3053 asection *resolved_plt;
3054 bfd_boolean resolved_to_zero;
3055 bfd_boolean relative_reloc;
3057 r_type = ELF32_R_TYPE (rel->r_info);
3058 if (r_type == R_386_GNU_VTINHERIT
3059 || r_type == R_386_GNU_VTENTRY)
3066 if ((indx = r_type) >= R_386_standard
3067 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3068 >= R_386_ext - R_386_standard)
3069 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3070 >= R_386_ext2 - R_386_ext))
3071 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
3073 howto = elf_howto_table + indx;
3075 r_symndx = ELF32_R_SYM (rel->r_info);
3079 unresolved_reloc = FALSE;
3080 if (r_symndx < symtab_hdr->sh_info)
3082 sym = local_syms + r_symndx;
3083 sec = local_sections[r_symndx];
3084 relocation = (sec->output_section->vma
3085 + sec->output_offset
3087 st_size = sym->st_size;
3089 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3090 && ((sec->flags & SEC_MERGE) != 0
3091 || (bfd_link_relocatable (info)
3092 && sec->output_offset != 0)))
3095 bfd_byte *where = contents + rel->r_offset;
3097 switch (howto->size)
3100 addend = bfd_get_8 (input_bfd, where);
3101 if (howto->pc_relative)
3103 addend = (addend ^ 0x80) - 0x80;
3108 addend = bfd_get_16 (input_bfd, where);
3109 if (howto->pc_relative)
3111 addend = (addend ^ 0x8000) - 0x8000;
3116 addend = bfd_get_32 (input_bfd, where);
3117 if (howto->pc_relative)
3119 addend = (addend ^ 0x80000000) - 0x80000000;
3127 if (bfd_link_relocatable (info))
3128 addend += sec->output_offset;
3131 asection *msec = sec;
3132 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3134 addend -= relocation;
3135 addend += msec->output_section->vma + msec->output_offset;
3138 switch (howto->size)
3141 /* FIXME: overflow checks. */
3142 if (howto->pc_relative)
3144 bfd_put_8 (input_bfd, addend, where);
3147 if (howto->pc_relative)
3149 bfd_put_16 (input_bfd, addend, where);
3152 if (howto->pc_relative)
3154 bfd_put_32 (input_bfd, addend, where);
3158 else if (!bfd_link_relocatable (info)
3159 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3161 /* Relocate against local STT_GNU_IFUNC symbol. */
3162 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
3167 /* Set STT_GNU_IFUNC symbol value. */
3168 h->root.u.def.value = sym->st_value;
3169 h->root.u.def.section = sec;
3174 bfd_boolean warned ATTRIBUTE_UNUSED;
3175 bfd_boolean ignored ATTRIBUTE_UNUSED;
3177 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3178 r_symndx, symtab_hdr, sym_hashes,
3180 unresolved_reloc, warned, ignored);
3184 if (sec != NULL && discarded_section (sec))
3186 _bfd_clear_contents (howto, input_bfd, input_section,
3187 contents + rel->r_offset);
3188 wrel->r_offset = rel->r_offset;
3192 /* For ld -r, remove relocations in debug sections against
3193 sections defined in discarded sections. Not done for
3194 eh_frame editing code expects to be present. */
3195 if (bfd_link_relocatable (info)
3196 && (input_section->flags & SEC_DEBUGGING))
3202 if (bfd_link_relocatable (info))
3209 eh = (struct elf_x86_link_hash_entry *) h;
3211 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3212 it here if it is defined in a non-shared object. */
3214 && h->type == STT_GNU_IFUNC
3217 asection *gotplt, *base_got;
3221 if ((input_section->flags & SEC_ALLOC) == 0)
3223 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3224 sections because such sections are not SEC_ALLOC and
3225 thus ld.so will not process them. */
3226 if ((input_section->flags & SEC_DEBUGGING) != 0)
3231 /* STT_GNU_IFUNC symbol must go through PLT. */
3232 if (htab->elf.splt != NULL)
3234 if (htab->plt_second != NULL)
3236 resolved_plt = htab->plt_second;
3237 plt_offset = eh->plt_second.offset;
3241 resolved_plt = htab->elf.splt;
3242 plt_offset = h->plt.offset;
3244 gotplt = htab->elf.sgotplt;
3248 resolved_plt = htab->elf.iplt;
3249 plt_offset = h->plt.offset;
3250 gotplt = htab->elf.igotplt;
3260 base_got = htab->elf.sgot;
3261 off = h->got.offset;
3263 if (base_got == NULL)
3266 if (off == (bfd_vma) -1)
3268 /* We can't use h->got.offset here to save state, or
3269 even just remember the offset, as finish_dynamic_symbol
3270 would use that as offset into .got. */
3272 if (h->plt.offset == (bfd_vma) -1)
3275 if (htab->elf.splt != NULL)
3277 plt_index = (h->plt.offset / plt_entry_size
3278 - htab->plt.has_plt0);
3279 off = (plt_index + 3) * 4;
3280 base_got = htab->elf.sgotplt;
3284 plt_index = h->plt.offset / plt_entry_size;
3285 off = plt_index * 4;
3286 base_got = htab->elf.igotplt;
3289 if (h->dynindx == -1
3293 /* This references the local defitionion. We must
3294 initialize this entry in the global offset table.
3295 Since the offset must always be a multiple of 8,
3296 we use the least significant bit to record
3297 whether we have initialized it already.
3299 When doing a dynamic link, we create a .rela.got
3300 relocation entry to initialize the value. This
3301 is done in the finish_dynamic_symbol routine. */
3306 bfd_put_32 (output_bfd, relocation,
3307 base_got->contents + off);
3315 relocation = (base_got->output_section->vma
3316 + base_got->output_offset + off
3317 - gotplt->output_section->vma
3318 - gotplt->output_offset);
3320 if (rel->r_offset > 1
3321 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3322 && *(contents + rel->r_offset - 2) != 0x8d)
3324 if (bfd_link_pic (info))
3325 goto disallow_got32;
3327 /* Add the GOT base if there is no base register. */
3328 relocation += (gotplt->output_section->vma
3329 + gotplt->output_offset);
3331 else if (htab->elf.splt == NULL)
3333 /* Adjust for static executables. */
3334 relocation += gotplt->output_offset;
3340 if (h->plt.offset == (bfd_vma) -1)
3342 /* Handle static pointers of STT_GNU_IFUNC symbols. */
3343 if (r_type == R_386_32
3344 && (input_section->flags & SEC_CODE) == 0)
3345 goto do_ifunc_pointer;
3346 goto bad_ifunc_reloc;
3349 relocation = (resolved_plt->output_section->vma
3350 + resolved_plt->output_offset + plt_offset);
3356 if (h->root.root.string)
3357 name = h->root.root.string;
3359 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3362 /* xgettext:c-format */
3363 (_("%B: relocation %s against STT_GNU_IFUNC "
3364 "symbol `%s' isn't supported"), input_bfd,
3366 bfd_set_error (bfd_error_bad_value);
3370 /* Generate dynamic relcoation only when there is a
3371 non-GOT reference in a shared object. */
3372 if ((bfd_link_pic (info) && h->non_got_ref)
3373 || h->plt.offset == (bfd_vma) -1)
3375 Elf_Internal_Rela outrel;
3380 /* Need a dynamic relocation to get the real function
3382 offset = _bfd_elf_section_offset (output_bfd,
3386 if (offset == (bfd_vma) -1
3387 || offset == (bfd_vma) -2)
3390 outrel.r_offset = (input_section->output_section->vma
3391 + input_section->output_offset
3394 if (h->dynindx == -1
3396 || bfd_link_executable (info))
3398 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
3399 h->root.root.string,
3400 h->root.u.def.section->owner);
3402 /* This symbol is resolved locally. */
3403 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3404 bfd_put_32 (output_bfd,
3405 (h->root.u.def.value
3406 + h->root.u.def.section->output_section->vma
3407 + h->root.u.def.section->output_offset),
3411 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3413 /* Dynamic relocations are stored in
3414 1. .rel.ifunc section in PIC object.
3415 2. .rel.got section in dynamic executable.
3416 3. .rel.iplt section in static executable. */
3417 if (bfd_link_pic (info))
3418 sreloc = htab->elf.irelifunc;
3419 else if (htab->elf.splt != NULL)
3420 sreloc = htab->elf.srelgot;
3422 sreloc = htab->elf.irelplt;
3423 elf_append_rel (output_bfd, sreloc, &outrel);
3425 /* If this reloc is against an external symbol, we
3426 do not want to fiddle with the addend. Otherwise,
3427 we need to include the symbol value so that it
3428 becomes an addend for the dynamic reloc. For an
3429 internal symbol, we have updated addend. */
3438 relocation -= (gotplt->output_section->vma
3439 + gotplt->output_offset);
3444 resolved_to_zero = (eh != NULL
3445 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
3453 /* Avoid optimizing _DYNAMIC since ld.so may use its
3454 link-time address. */
3455 if (h == htab->elf.hdynamic)
3458 if (bfd_link_pic (info))
3460 /* It is OK to convert mov to lea and convert indirect
3461 branch to direct branch. It is OK to convert adc,
3462 add, and, cmp, or, sbb, sub, test, xor only when PIC
3464 unsigned int opcode, addend;
3465 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
3468 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3469 if (opcode != 0x8b && opcode != 0xff)
3473 /* Resolve "mov GOT[(%reg)], %reg",
3474 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
3475 and "binop foo@GOT[(%reg)], %reg". */
3477 || (h->plt.offset == (bfd_vma) -1
3478 && h->got.offset == (bfd_vma) -1)
3479 || htab->elf.sgotplt == NULL)
3482 offplt = (htab->elf.sgotplt->output_section->vma
3483 + htab->elf.sgotplt->output_offset);
3485 /* It is relative to .got.plt section. */
3486 if (h->got.offset != (bfd_vma) -1)
3487 /* Use GOT entry. Mask off the least significant bit in
3488 GOT offset which may be set by R_386_GOT32 processing
3490 relocation = (htab->elf.sgot->output_section->vma
3491 + htab->elf.sgot->output_offset
3492 + (h->got.offset & ~1) - offplt);
3494 /* Use GOTPLT entry. */
3495 relocation = (h->plt.offset / plt_entry_size
3496 - htab->plt.has_plt0 + 3) * 4;
3498 if (!bfd_link_pic (info))
3500 /* If not PIC, add the .got.plt section address for
3501 baseless addressing. */
3503 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3504 if ((modrm & 0xc7) == 0x5)
3505 relocation += offplt;
3508 unresolved_reloc = FALSE;
3513 /* Relocation is to the entry for this symbol in the global
3515 if (htab->elf.sgot == NULL)
3518 relative_reloc = FALSE;
3523 off = h->got.offset;
3524 dyn = htab->elf.dynamic_sections_created;
3525 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3526 bfd_link_pic (info),
3528 || (bfd_link_pic (info)
3529 && SYMBOL_REFERENCES_LOCAL (info, h))
3530 || (ELF_ST_VISIBILITY (h->other)
3531 && h->root.type == bfd_link_hash_undefweak))
3533 /* This is actually a static link, or it is a
3534 -Bsymbolic link and the symbol is defined
3535 locally, or the symbol was forced to be local
3536 because of a version file. We must initialize
3537 this entry in the global offset table. Since the
3538 offset must always be a multiple of 4, we use the
3539 least significant bit to record whether we have
3540 initialized it already.
3542 When doing a dynamic link, we create a .rel.got
3543 relocation entry to initialize the value. This
3544 is done in the finish_dynamic_symbol routine. */
3549 bfd_put_32 (output_bfd, relocation,
3550 htab->elf.sgot->contents + off);
3553 if (h->dynindx == -1
3555 && h->root.type != bfd_link_hash_undefweak
3556 && bfd_link_pic (info))
3558 /* PR ld/21402: If this symbol isn't dynamic
3559 in PIC, generate R_386_RELATIVE here. */
3560 eh->no_finish_dynamic_symbol = 1;
3561 relative_reloc = TRUE;
3566 unresolved_reloc = FALSE;
3570 if (local_got_offsets == NULL)
3573 off = local_got_offsets[r_symndx];
3575 /* The offset must always be a multiple of 4. We use
3576 the least significant bit to record whether we have
3577 already generated the necessary reloc. */
3582 bfd_put_32 (output_bfd, relocation,
3583 htab->elf.sgot->contents + off);
3584 local_got_offsets[r_symndx] |= 1;
3586 if (bfd_link_pic (info))
3587 relative_reloc = TRUE;
3594 Elf_Internal_Rela outrel;
3596 s = htab->elf.srelgot;
3600 outrel.r_offset = (htab->elf.sgot->output_section->vma
3601 + htab->elf.sgot->output_offset
3603 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3604 elf_append_rel (output_bfd, s, &outrel);
3607 if (off >= (bfd_vma) -2)
3610 relocation = (htab->elf.sgot->output_section->vma
3611 + htab->elf.sgot->output_offset + off);
3612 if (rel->r_offset > 1
3613 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3614 && *(contents + rel->r_offset - 2) != 0x8d)
3616 if (bfd_link_pic (info))
3618 /* For PIC, disallow R_386_GOT32 without a base
3619 register, except for "lea foo@GOT, %reg", since
3620 we don't know what the GOT base is. */
3624 if (h == NULL || h->root.root.string == NULL)
3625 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3628 name = h->root.root.string;
3631 /* xgettext:c-format */
3632 (_("%B: direct GOT relocation %s against `%s'"
3633 " without base register can not be used"
3634 " when making a shared object"),
3635 input_bfd, howto->name, name);
3636 bfd_set_error (bfd_error_bad_value);
3642 /* Subtract the .got.plt section address only with a base
3644 relocation -= (htab->elf.sgotplt->output_section->vma
3645 + htab->elf.sgotplt->output_offset);
3651 /* Relocation is relative to the start of the global offset
3654 /* Check to make sure it isn't a protected function or data
3655 symbol for shared library since it may not be local when
3656 used as function address or with copy relocation. We also
3657 need to make sure that a symbol is referenced locally. */
3658 if (!bfd_link_executable (info) && h)
3660 if (!h->def_regular)
3664 switch (ELF_ST_VISIBILITY (h->other))
3667 v = _("hidden symbol");
3670 v = _("internal symbol");
3673 v = _("protected symbol");
3681 /* xgettext:c-format */
3682 (_("%B: relocation R_386_GOTOFF against undefined %s"
3683 " `%s' can not be used when making a shared object"),
3684 input_bfd, v, h->root.root.string);
3685 bfd_set_error (bfd_error_bad_value);
3688 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3689 && (h->type == STT_FUNC
3690 || h->type == STT_OBJECT)
3691 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3694 /* xgettext:c-format */
3695 (_("%B: relocation R_386_GOTOFF against protected %s"
3696 " `%s' can not be used when making a shared object"),
3698 h->type == STT_FUNC ? "function" : "data",
3699 h->root.root.string);
3700 bfd_set_error (bfd_error_bad_value);
3705 /* Note that sgot is not involved in this
3706 calculation. We always want the start of .got.plt. If we
3707 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3708 permitted by the ABI, we might have to change this
3710 relocation -= htab->elf.sgotplt->output_section->vma
3711 + htab->elf.sgotplt->output_offset;
3715 /* Use global offset table as symbol value. */
3716 relocation = htab->elf.sgotplt->output_section->vma
3717 + htab->elf.sgotplt->output_offset;
3718 unresolved_reloc = FALSE;
3722 /* Relocation is to the entry for this symbol in the
3723 procedure linkage table. */
3725 /* Resolve a PLT32 reloc against a local symbol directly,
3726 without using the procedure linkage table. */
3730 if ((h->plt.offset == (bfd_vma) -1
3731 && eh->plt_got.offset == (bfd_vma) -1)
3732 || htab->elf.splt == NULL)
3734 /* We didn't make a PLT entry for this symbol. This
3735 happens when statically linking PIC code, or when
3736 using -Bsymbolic. */
3740 if (h->plt.offset != (bfd_vma) -1)
3742 if (htab->plt_second != NULL)
3744 resolved_plt = htab->plt_second;
3745 plt_offset = eh->plt_second.offset;
3749 resolved_plt = htab->elf.splt;
3750 plt_offset = h->plt.offset;
3755 resolved_plt = htab->plt_got;
3756 plt_offset = eh->plt_got.offset;
3759 relocation = (resolved_plt->output_section->vma
3760 + resolved_plt->output_offset
3762 unresolved_reloc = FALSE;
3766 /* Set to symbol size. */
3767 relocation = st_size;
3772 if ((input_section->flags & SEC_ALLOC) == 0
3776 /* Copy dynamic function pointer relocations. Don't generate
3777 dynamic relocations against resolved undefined weak symbols
3778 in PIE, except for R_386_PC32. */
3779 if ((bfd_link_pic (info)
3781 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3782 && (!resolved_to_zero
3783 || r_type == R_386_PC32))
3784 || h->root.type != bfd_link_hash_undefweak))
3785 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3786 || !SYMBOL_CALLS_LOCAL (info, h)))
3787 || (ELIMINATE_COPY_RELOCS
3788 && !bfd_link_pic (info)
3792 || eh->func_pointer_refcount > 0
3793 || (h->root.type == bfd_link_hash_undefweak
3794 && !resolved_to_zero))
3795 && ((h->def_dynamic && !h->def_regular)
3796 /* Undefined weak symbol is bound locally when
3798 || h->root.type == bfd_link_hash_undefweak)))
3800 Elf_Internal_Rela outrel;
3801 bfd_boolean skip, relocate;
3804 /* When generating a shared object, these relocations
3805 are copied into the output file to be resolved at run
3812 _bfd_elf_section_offset (output_bfd, info, input_section,
3814 if (outrel.r_offset == (bfd_vma) -1)
3816 else if (outrel.r_offset == (bfd_vma) -2)
3817 skip = TRUE, relocate = TRUE;
3818 outrel.r_offset += (input_section->output_section->vma
3819 + input_section->output_offset);
3822 memset (&outrel, 0, sizeof outrel);
3825 && (r_type == R_386_PC32
3826 || !(bfd_link_executable (info)
3827 || SYMBOLIC_BIND (info, h))
3828 || !h->def_regular))
3829 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3832 /* This symbol is local, or marked to become local. */
3834 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3837 sreloc = elf_section_data (input_section)->sreloc;
3839 if (sreloc == NULL || sreloc->contents == NULL)
3841 r = bfd_reloc_notsupported;
3842 goto check_relocation_error;
3845 elf_append_rel (output_bfd, sreloc, &outrel);
3847 /* If this reloc is against an external symbol, we do
3848 not want to fiddle with the addend. Otherwise, we
3849 need to include the symbol value so that it becomes
3850 an addend for the dynamic reloc. */
3857 if (!bfd_link_executable (info))
3859 Elf_Internal_Rela outrel;
3862 outrel.r_offset = rel->r_offset
3863 + input_section->output_section->vma
3864 + input_section->output_offset;
3865 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3866 sreloc = elf_section_data (input_section)->sreloc;
3869 elf_append_rel (output_bfd, sreloc, &outrel);
3874 case R_386_TLS_GOTDESC:
3875 case R_386_TLS_DESC_CALL:
3876 case R_386_TLS_IE_32:
3877 case R_386_TLS_GOTIE:
3878 tls_type = GOT_UNKNOWN;
3879 if (h == NULL && local_got_offsets)
3880 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
3882 tls_type = elf_x86_hash_entry(h)->tls_type;
3883 if (tls_type == GOT_TLS_IE)
3884 tls_type = GOT_TLS_IE_NEG;
3886 if (! elf_i386_tls_transition (info, input_bfd,
3887 input_section, contents,
3888 symtab_hdr, sym_hashes,
3889 &r_type, tls_type, rel,
3890 relend, h, r_symndx, TRUE))
3893 if (r_type == R_386_TLS_LE_32)
3895 BFD_ASSERT (! unresolved_reloc);
3896 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3901 /* GD->LE transition. */
3902 type = *(contents + rel->r_offset - 2);
3906 leal foo@tlsgd(,%ebx,1), %eax
3907 call ___tls_get_addr@PLT
3910 subl $foo@tpoff, %eax
3911 (6 byte form of subl). */
3912 roff = rel->r_offset + 5;
3917 leal foo@tlsgd(%ebx), %eax
3918 call ___tls_get_addr@PLT
3921 leal foo@tlsgd(%reg), %eax
3922 call *___tls_get_addr@GOT(%reg)
3923 which may be converted to
3924 addr32 call ___tls_get_addr
3926 movl %gs:0, %eax; subl $foo@tpoff, %eax
3927 (6 byte form of subl). */
3928 roff = rel->r_offset + 6;
3930 memcpy (contents + roff - 8,
3931 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3932 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3934 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
3939 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3941 /* GDesc -> LE transition.
3942 It's originally something like:
3943 leal x@tlsdesc(%ebx), %eax
3947 Registers other than %eax may be set up here. */
3952 roff = rel->r_offset;
3953 val = bfd_get_8 (input_bfd, contents + roff - 1);
3955 /* Now modify the instruction as appropriate. */
3956 /* aoliva FIXME: remove the above and xor the byte
3958 bfd_put_8 (output_bfd, val ^ 0x86,
3959 contents + roff - 1);
3960 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3964 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3966 /* GDesc -> LE transition.
3974 roff = rel->r_offset;
3975 bfd_put_8 (output_bfd, 0x66, contents + roff);
3976 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3979 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3983 /* IE->LE transition:
3984 Originally it can be one of:
3992 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3995 /* movl foo, %eax. */
3996 bfd_put_8 (output_bfd, 0xb8,
3997 contents + rel->r_offset - 1);
4003 type = bfd_get_8 (input_bfd,
4004 contents + rel->r_offset - 2);
4009 bfd_put_8 (output_bfd, 0xc7,
4010 contents + rel->r_offset - 2);
4011 bfd_put_8 (output_bfd,
4012 0xc0 | ((val >> 3) & 7),
4013 contents + rel->r_offset - 1);
4017 bfd_put_8 (output_bfd, 0x81,
4018 contents + rel->r_offset - 2);
4019 bfd_put_8 (output_bfd,
4020 0xc0 | ((val >> 3) & 7),
4021 contents + rel->r_offset - 1);
4028 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4029 contents + rel->r_offset);
4034 unsigned int val, type;
4036 /* {IE_32,GOTIE}->LE transition:
4037 Originally it can be one of:
4038 subl foo(%reg1), %reg2
4039 movl foo(%reg1), %reg2
4040 addl foo(%reg1), %reg2
4043 movl $foo, %reg2 (6 byte form)
4044 addl $foo, %reg2. */
4045 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4046 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4050 bfd_put_8 (output_bfd, 0xc7,
4051 contents + rel->r_offset - 2);
4052 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4053 contents + rel->r_offset - 1);
4055 else if (type == 0x2b)
4058 bfd_put_8 (output_bfd, 0x81,
4059 contents + rel->r_offset - 2);
4060 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4061 contents + rel->r_offset - 1);
4063 else if (type == 0x03)
4066 bfd_put_8 (output_bfd, 0x81,
4067 contents + rel->r_offset - 2);
4068 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4069 contents + rel->r_offset - 1);
4073 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4074 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4075 contents + rel->r_offset);
4077 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4078 contents + rel->r_offset);
4083 if (htab->elf.sgot == NULL)
4088 off = h->got.offset;
4089 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
4093 if (local_got_offsets == NULL)
4096 off = local_got_offsets[r_symndx];
4097 offplt = local_tlsdesc_gotents[r_symndx];
4104 Elf_Internal_Rela outrel;
4108 if (htab->elf.srelgot == NULL)
4111 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4113 if (GOT_TLS_GDESC_P (tls_type))
4116 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4117 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4118 <= htab->elf.sgotplt->size);
4119 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4120 + htab->elf.sgotplt->output_offset
4122 + htab->sgotplt_jump_table_size);
4123 sreloc = htab->elf.srelplt;
4124 loc = sreloc->contents;
4125 loc += (htab->next_tls_desc_index++
4126 * sizeof (Elf32_External_Rel));
4127 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4128 <= sreloc->contents + sreloc->size);
4129 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4132 BFD_ASSERT (! unresolved_reloc);
4133 bfd_put_32 (output_bfd,
4134 relocation - _bfd_x86_elf_dtpoff_base (info),
4135 htab->elf.sgotplt->contents + offplt
4136 + htab->sgotplt_jump_table_size + 4);
4140 bfd_put_32 (output_bfd, 0,
4141 htab->elf.sgotplt->contents + offplt
4142 + htab->sgotplt_jump_table_size + 4);
4146 sreloc = htab->elf.srelgot;
4148 outrel.r_offset = (htab->elf.sgot->output_section->vma
4149 + htab->elf.sgot->output_offset + off);
4151 if (GOT_TLS_GD_P (tls_type))
4152 dr_type = R_386_TLS_DTPMOD32;
4153 else if (GOT_TLS_GDESC_P (tls_type))
4155 else if (tls_type == GOT_TLS_IE_POS)
4156 dr_type = R_386_TLS_TPOFF;
4158 dr_type = R_386_TLS_TPOFF32;
4160 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4161 bfd_put_32 (output_bfd,
4162 relocation - _bfd_x86_elf_dtpoff_base (info),
4163 htab->elf.sgot->contents + off);
4164 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4165 bfd_put_32 (output_bfd,
4166 _bfd_x86_elf_dtpoff_base (info) - relocation,
4167 htab->elf.sgot->contents + off);
4168 else if (dr_type != R_386_TLS_DESC)
4169 bfd_put_32 (output_bfd, 0,
4170 htab->elf.sgot->contents + off);
4171 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4173 elf_append_rel (output_bfd, sreloc, &outrel);
4175 if (GOT_TLS_GD_P (tls_type))
4179 BFD_ASSERT (! unresolved_reloc);
4180 bfd_put_32 (output_bfd,
4181 relocation - _bfd_x86_elf_dtpoff_base (info),
4182 htab->elf.sgot->contents + off + 4);
4186 bfd_put_32 (output_bfd, 0,
4187 htab->elf.sgot->contents + off + 4);
4188 outrel.r_info = ELF32_R_INFO (indx,
4189 R_386_TLS_DTPOFF32);
4190 outrel.r_offset += 4;
4191 elf_append_rel (output_bfd, sreloc, &outrel);
4194 else if (tls_type == GOT_TLS_IE_BOTH)
4196 bfd_put_32 (output_bfd,
4198 ? relocation - _bfd_x86_elf_dtpoff_base (info)
4200 htab->elf.sgot->contents + off + 4);
4201 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4202 outrel.r_offset += 4;
4203 elf_append_rel (output_bfd, sreloc, &outrel);
4210 local_got_offsets[r_symndx] |= 1;
4213 if (off >= (bfd_vma) -2
4214 && ! GOT_TLS_GDESC_P (tls_type))
4216 if (r_type == R_386_TLS_GOTDESC
4217 || r_type == R_386_TLS_DESC_CALL)
4219 relocation = htab->sgotplt_jump_table_size + offplt;
4220 unresolved_reloc = FALSE;
4222 else if (r_type == ELF32_R_TYPE (rel->r_info))
4224 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4225 + htab->elf.sgotplt->output_offset;
4226 relocation = htab->elf.sgot->output_section->vma
4227 + htab->elf.sgot->output_offset + off - g_o_t;
4228 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4229 && tls_type == GOT_TLS_IE_BOTH)
4231 if (r_type == R_386_TLS_IE)
4232 relocation += g_o_t;
4233 unresolved_reloc = FALSE;
4235 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4237 unsigned int val, type;
4240 /* GD->IE transition. */
4241 type = *(contents + rel->r_offset - 2);
4242 val = *(contents + rel->r_offset - 1);
4246 leal foo@tlsgd(,%ebx,1), %eax
4247 call ___tls_get_addr@PLT
4250 subl $foo@gottpoff(%ebx), %eax. */
4252 roff = rel->r_offset - 3;
4257 leal foo@tlsgd(%ebx), %eax
4258 call ___tls_get_addr@PLT
4261 leal foo@tlsgd(%reg), %eax
4262 call *___tls_get_addr@GOT(%reg)
4263 which may be converted to
4264 addr32 call ___tls_get_addr
4267 subl $foo@gottpoff(%reg), %eax. */
4268 roff = rel->r_offset - 2;
4270 memcpy (contents + roff,
4271 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4272 contents[roff + 7] = 0x80 | (val & 7);
4273 /* If foo is used only with foo@gotntpoff(%reg) and
4274 foo@indntpoff, but not with foo@gottpoff(%reg), change
4275 subl $foo@gottpoff(%reg), %eax
4277 addl $foo@gotntpoff(%reg), %eax. */
4278 if (tls_type == GOT_TLS_IE_POS)
4279 contents[roff + 6] = 0x03;
4280 bfd_put_32 (output_bfd,
4281 htab->elf.sgot->output_section->vma
4282 + htab->elf.sgot->output_offset + off
4283 - htab->elf.sgotplt->output_section->vma
4284 - htab->elf.sgotplt->output_offset,
4285 contents + roff + 8);
4286 /* Skip R_386_PLT32 and R_386_GOT32X. */
4291 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4293 /* GDesc -> IE transition.
4294 It's originally something like:
4295 leal x@tlsdesc(%ebx), %eax
4298 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4300 movl x@gottpoff(%ebx), %eax # before negl %eax
4302 Registers other than %eax may be set up here. */
4306 /* First, make sure it's a leal adding ebx to a 32-bit
4307 offset into any register, although it's probably
4308 almost always going to be eax. */
4309 roff = rel->r_offset;
4311 /* Now modify the instruction as appropriate. */
4312 /* To turn a leal into a movl in the form we use it, it
4313 suffices to change the first byte from 0x8d to 0x8b.
4314 aoliva FIXME: should we decide to keep the leal, all
4315 we have to do is remove the statement below, and
4316 adjust the relaxation of R_386_TLS_DESC_CALL. */
4317 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4319 if (tls_type == GOT_TLS_IE_BOTH)
4322 bfd_put_32 (output_bfd,
4323 htab->elf.sgot->output_section->vma
4324 + htab->elf.sgot->output_offset + off
4325 - htab->elf.sgotplt->output_section->vma
4326 - htab->elf.sgotplt->output_offset,
4330 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4332 /* GDesc -> IE transition.
4340 depending on how we transformed the TLS_GOTDESC above.
4345 roff = rel->r_offset;
4347 /* Now modify the instruction as appropriate. */
4348 if (tls_type != GOT_TLS_IE_NEG)
4351 bfd_put_8 (output_bfd, 0x66, contents + roff);
4352 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4357 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4358 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4368 if (! elf_i386_tls_transition (info, input_bfd,
4369 input_section, contents,
4370 symtab_hdr, sym_hashes,
4371 &r_type, GOT_UNKNOWN, rel,
4372 relend, h, r_symndx, TRUE))
4375 if (r_type != R_386_TLS_LDM)
4377 /* LD->LE transition. Change
4378 leal foo@tlsldm(%ebx) %eax
4379 call ___tls_get_addr@PLT
4383 leal 0(%esi,1), %esi
4385 leal foo@tlsldm(%reg) %eax
4386 call *___tls_get_addr@GOT(%reg)
4387 which may be converted to
4388 addr32 call ___tls_get_addr
4391 leal 0(%esi), %esi */
4392 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4393 if (*(contents + rel->r_offset + 4) == 0xff
4394 || *(contents + rel->r_offset + 4) == 0x67)
4395 memcpy (contents + rel->r_offset - 2,
4396 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
4398 memcpy (contents + rel->r_offset - 2,
4399 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4400 /* Skip R_386_PC32/R_386_PLT32. */
4406 if (htab->elf.sgot == NULL)
4409 off = htab->tls_ld_or_ldm_got.offset;
4414 Elf_Internal_Rela outrel;
4416 if (htab->elf.srelgot == NULL)
4419 outrel.r_offset = (htab->elf.sgot->output_section->vma
4420 + htab->elf.sgot->output_offset + off);
4422 bfd_put_32 (output_bfd, 0,
4423 htab->elf.sgot->contents + off);
4424 bfd_put_32 (output_bfd, 0,
4425 htab->elf.sgot->contents + off + 4);
4426 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4427 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4428 htab->tls_ld_or_ldm_got.offset |= 1;
4430 relocation = htab->elf.sgot->output_section->vma
4431 + htab->elf.sgot->output_offset + off
4432 - htab->elf.sgotplt->output_section->vma
4433 - htab->elf.sgotplt->output_offset;
4434 unresolved_reloc = FALSE;
4437 case R_386_TLS_LDO_32:
4438 if (!bfd_link_executable (info)
4439 || (input_section->flags & SEC_CODE) == 0)
4440 relocation -= _bfd_x86_elf_dtpoff_base (info);
4442 /* When converting LDO to LE, we must negate. */
4443 relocation = -elf_i386_tpoff (info, relocation);
4446 case R_386_TLS_LE_32:
4448 if (!bfd_link_executable (info))
4450 Elf_Internal_Rela outrel;
4453 outrel.r_offset = rel->r_offset
4454 + input_section->output_section->vma
4455 + input_section->output_offset;
4456 if (h != NULL && h->dynindx != -1)
4460 if (r_type == R_386_TLS_LE_32)
4461 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4463 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4464 sreloc = elf_section_data (input_section)->sreloc;
4467 elf_append_rel (output_bfd, sreloc, &outrel);
4470 else if (r_type == R_386_TLS_LE_32)
4471 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
4473 relocation -= _bfd_x86_elf_dtpoff_base (info);
4475 else if (r_type == R_386_TLS_LE_32)
4476 relocation = elf_i386_tpoff (info, relocation);
4478 relocation = -elf_i386_tpoff (info, relocation);
4485 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4486 because such sections are not SEC_ALLOC and thus ld.so will
4487 not process them. */
4488 if (unresolved_reloc
4489 && !((input_section->flags & SEC_DEBUGGING) != 0
4491 && _bfd_elf_section_offset (output_bfd, info, input_section,
4492 rel->r_offset) != (bfd_vma) -1)
4495 /* xgettext:c-format */
4496 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
4501 h->root.root.string);
4506 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4507 contents, rel->r_offset,
4510 check_relocation_error:
4511 if (r != bfd_reloc_ok)
4516 name = h->root.root.string;
4519 name = bfd_elf_string_from_elf_section (input_bfd,
4520 symtab_hdr->sh_link,
4525 name = bfd_section_name (input_bfd, sec);
4528 if (r == bfd_reloc_overflow)
4529 (*info->callbacks->reloc_overflow)
4530 (info, (h ? &h->root : NULL), name, howto->name,
4531 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
4535 /* xgettext:c-format */
4536 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
4537 input_bfd, input_section,
4538 rel->r_offset, name, (int) r);
4549 Elf_Internal_Shdr *rel_hdr;
4550 size_t deleted = rel - wrel;
4552 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4553 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4554 if (rel_hdr->sh_size == 0)
4556 /* It is too late to remove an empty reloc section. Leave
4558 ??? What is wrong with an empty section??? */
4559 rel_hdr->sh_size = rel_hdr->sh_entsize;
4562 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4563 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4564 input_section->reloc_count -= deleted;
4570 /* Finish up dynamic symbol handling. We set the contents of various
4571 dynamic sections here. */
4574 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4575 struct bfd_link_info *info,
4576 struct elf_link_hash_entry *h,
4577 Elf_Internal_Sym *sym)
4579 struct elf_x86_link_hash_table *htab;
4580 unsigned plt_entry_size;
4581 struct elf_x86_link_hash_entry *eh;
4582 bfd_boolean local_undefweak;
4583 bfd_boolean use_plt_second;
4585 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4589 plt_entry_size = htab->plt.plt_entry_size;
4591 /* Use the second PLT section only if there is .plt section. */
4592 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
4594 eh = (struct elf_x86_link_hash_entry *) h;
4595 if (eh->no_finish_dynamic_symbol)
4598 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4599 resolved undefined weak symbols in executable so that their
4600 references have value 0 at run-time. */
4601 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, I386_ELF_DATA,
4605 if (h->plt.offset != (bfd_vma) -1)
4607 bfd_vma plt_index, plt_offset;
4609 Elf_Internal_Rela rel;
4611 asection *plt, *resolved_plt, *gotplt, *relplt;
4613 /* When building a static executable, use .iplt, .igot.plt and
4614 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4615 if (htab->elf.splt != NULL)
4617 plt = htab->elf.splt;
4618 gotplt = htab->elf.sgotplt;
4619 relplt = htab->elf.srelplt;
4623 plt = htab->elf.iplt;
4624 gotplt = htab->elf.igotplt;
4625 relplt = htab->elf.irelplt;
4628 /* This symbol has an entry in the procedure linkage table. Set
4631 if ((h->dynindx == -1
4633 && !((h->forced_local || bfd_link_executable (info))
4635 && h->type == STT_GNU_IFUNC))
4641 /* Get the index in the procedure linkage table which
4642 corresponds to this symbol. This is the index of this symbol
4643 in all the symbols for which we are making plt entries. The
4644 first entry in the procedure linkage table is reserved.
4646 Get the offset into the .got table of the entry that
4647 corresponds to this function. Each .got entry is 4 bytes.
4648 The first three are reserved.
4650 For static executables, we don't reserve anything. */
4652 if (plt == htab->elf.splt)
4654 got_offset = (h->plt.offset / plt_entry_size
4655 - htab->plt.has_plt0);
4656 got_offset = (got_offset + 3) * 4;
4660 got_offset = h->plt.offset / plt_entry_size;
4661 got_offset = got_offset * 4;
4664 /* Fill in the entry in the procedure linkage table and update
4666 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
4671 const bfd_byte *plt_entry;
4672 if (bfd_link_pic (info))
4673 plt_entry = htab->non_lazy_plt->pic_plt_entry;
4675 plt_entry = htab->non_lazy_plt->plt_entry;
4676 memcpy (htab->plt_second->contents + eh->plt_second.offset,
4677 plt_entry, htab->non_lazy_plt->plt_entry_size);
4679 resolved_plt = htab->plt_second;
4680 plt_offset = eh->plt_second.offset;
4685 plt_offset = h->plt.offset;
4688 if (! bfd_link_pic (info))
4690 bfd_put_32 (output_bfd,
4691 (gotplt->output_section->vma
4692 + gotplt->output_offset
4694 resolved_plt->contents + plt_offset
4695 + htab->plt.plt_got_offset);
4697 if (htab->is_vxworks)
4699 int s, k, reloc_index;
4701 /* Create the R_386_32 relocation referencing the GOT
4702 for this PLT entry. */
4704 /* S: Current slot number (zero-based). */
4705 s = ((h->plt.offset - htab->plt.plt_entry_size)
4706 / htab->plt.plt_entry_size);
4707 /* K: Number of relocations for PLTResolve. */
4708 if (bfd_link_pic (info))
4709 k = PLTRESOLVE_RELOCS_SHLIB;
4711 k = PLTRESOLVE_RELOCS;
4712 /* Skip the PLTresolve relocations, and the relocations for
4713 the other PLT slots. */
4714 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4715 loc = (htab->srelplt2->contents + reloc_index
4716 * sizeof (Elf32_External_Rel));
4718 rel.r_offset = (plt->output_section->vma
4719 + plt->output_offset
4720 + h->plt.offset + 2),
4721 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4722 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4724 /* Create the R_386_32 relocation referencing the beginning of
4725 the PLT for this GOT entry. */
4726 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4727 + htab->elf.sgotplt->output_offset
4729 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4730 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4731 loc + sizeof (Elf32_External_Rel));
4736 bfd_put_32 (output_bfd, got_offset,
4737 resolved_plt->contents + plt_offset
4738 + htab->plt.plt_got_offset);
4741 /* Fill in the entry in the global offset table. Leave the entry
4742 as zero for undefined weak symbol in PIE. No PLT relocation
4743 against undefined weak symbol in PIE. */
4744 if (!local_undefweak)
4746 if (htab->plt.has_plt0)
4747 bfd_put_32 (output_bfd,
4748 (plt->output_section->vma
4749 + plt->output_offset
4751 + htab->lazy_plt->plt_lazy_offset),
4752 gotplt->contents + got_offset);
4754 /* Fill in the entry in the .rel.plt section. */
4755 rel.r_offset = (gotplt->output_section->vma
4756 + gotplt->output_offset
4758 if (h->dynindx == -1
4759 || ((bfd_link_executable (info)
4760 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4762 && h->type == STT_GNU_IFUNC))
4764 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4765 h->root.root.string,
4766 h->root.u.def.section->owner);
4768 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4769 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4770 in the .got.plt section. */
4771 bfd_put_32 (output_bfd,
4772 (h->root.u.def.value
4773 + h->root.u.def.section->output_section->vma
4774 + h->root.u.def.section->output_offset),
4775 gotplt->contents + got_offset);
4776 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4777 /* R_386_IRELATIVE comes last. */
4778 plt_index = htab->next_irelative_index--;
4782 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4783 plt_index = htab->next_jump_slot_index++;
4786 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4787 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4789 /* Don't fill the second and third slots in PLT entry for
4790 static executables nor without PLT0. */
4791 if (plt == htab->elf.splt && htab->plt.has_plt0)
4793 bfd_put_32 (output_bfd,
4794 plt_index * sizeof (Elf32_External_Rel),
4795 plt->contents + h->plt.offset
4796 + htab->lazy_plt->plt_reloc_offset);
4797 bfd_put_32 (output_bfd,
4799 + htab->lazy_plt->plt_plt_offset + 4),
4800 (plt->contents + h->plt.offset
4801 + htab->lazy_plt->plt_plt_offset));
4805 else if (eh->plt_got.offset != (bfd_vma) -1)
4807 bfd_vma got_offset, plt_offset;
4808 asection *plt, *got, *gotplt;
4809 const bfd_byte *got_plt_entry;
4811 /* Set the entry in the GOT procedure linkage table. */
4812 plt = htab->plt_got;
4813 got = htab->elf.sgot;
4814 gotplt = htab->elf.sgotplt;
4815 got_offset = h->got.offset;
4817 if (got_offset == (bfd_vma) -1
4823 /* Fill in the entry in the GOT procedure linkage table. */
4824 if (! bfd_link_pic (info))
4826 got_plt_entry = htab->non_lazy_plt->plt_entry;
4827 got_offset += got->output_section->vma + got->output_offset;
4831 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
4832 got_offset += (got->output_section->vma
4833 + got->output_offset
4834 - gotplt->output_section->vma
4835 - gotplt->output_offset);
4838 plt_offset = eh->plt_got.offset;
4839 memcpy (plt->contents + plt_offset, got_plt_entry,
4840 htab->non_lazy_plt->plt_entry_size);
4841 bfd_put_32 (output_bfd, got_offset,
4842 (plt->contents + plt_offset
4843 + htab->non_lazy_plt->plt_got_offset));
4846 if (!local_undefweak
4848 && (h->plt.offset != (bfd_vma) -1
4849 || eh->plt_got.offset != (bfd_vma) -1))
4851 /* Mark the symbol as undefined, rather than as defined in
4852 the .plt section. Leave the value if there were any
4853 relocations where pointer equality matters (this is a clue
4854 for the dynamic linker, to make function pointer
4855 comparisons work between an application and shared
4856 library), otherwise set it to zero. If a function is only
4857 called from a binary, there is no need to slow down
4858 shared libraries because of that. */
4859 sym->st_shndx = SHN_UNDEF;
4860 if (!h->pointer_equality_needed)
4864 /* Don't generate dynamic GOT relocation against undefined weak
4865 symbol in executable. */
4866 if (h->got.offset != (bfd_vma) -1
4867 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
4868 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
4869 && !local_undefweak)
4871 Elf_Internal_Rela rel;
4872 asection *relgot = htab->elf.srelgot;
4874 /* This symbol has an entry in the global offset table. Set it
4877 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4880 rel.r_offset = (htab->elf.sgot->output_section->vma
4881 + htab->elf.sgot->output_offset
4882 + (h->got.offset & ~(bfd_vma) 1));
4884 /* If this is a static link, or it is a -Bsymbolic link and the
4885 symbol is defined locally or was forced to be local because
4886 of a version file, we just want to emit a RELATIVE reloc.
4887 The entry in the global offset table will already have been
4888 initialized in the relocate_section function. */
4890 && h->type == STT_GNU_IFUNC)
4892 if (h->plt.offset == (bfd_vma) -1)
4894 /* STT_GNU_IFUNC is referenced without PLT. */
4895 if (htab->elf.splt == NULL)
4897 /* use .rel[a].iplt section to store .got relocations
4898 in static executable. */
4899 relgot = htab->elf.irelplt;
4901 if (SYMBOL_REFERENCES_LOCAL (info, h))
4903 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4904 h->root.root.string,
4905 h->root.u.def.section->owner);
4907 bfd_put_32 (output_bfd,
4908 (h->root.u.def.value
4909 + h->root.u.def.section->output_section->vma
4910 + h->root.u.def.section->output_offset),
4911 htab->elf.sgot->contents + h->got.offset);
4912 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4917 else if (bfd_link_pic (info))
4919 /* Generate R_386_GLOB_DAT. */
4927 if (!h->pointer_equality_needed)
4930 /* For non-shared object, we can't use .got.plt, which
4931 contains the real function addres if we need pointer
4932 equality. We load the GOT entry with the PLT entry. */
4933 if (htab->plt_second != NULL)
4935 plt = htab->plt_second;
4936 plt_offset = eh->plt_second.offset;
4940 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4941 plt_offset = h->plt.offset;
4943 bfd_put_32 (output_bfd,
4944 (plt->output_section->vma
4945 + plt->output_offset + plt_offset),
4946 htab->elf.sgot->contents + h->got.offset);
4950 else if (bfd_link_pic (info)
4951 && SYMBOL_REFERENCES_LOCAL (info, h))
4953 BFD_ASSERT((h->got.offset & 1) != 0);
4954 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4958 BFD_ASSERT((h->got.offset & 1) == 0);
4960 bfd_put_32 (output_bfd, (bfd_vma) 0,
4961 htab->elf.sgot->contents + h->got.offset);
4962 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4965 elf_append_rel (output_bfd, relgot, &rel);
4970 Elf_Internal_Rela rel;
4973 /* This symbol needs a copy reloc. Set it up. */
4975 if (h->dynindx == -1
4976 || (h->root.type != bfd_link_hash_defined
4977 && h->root.type != bfd_link_hash_defweak)
4978 || htab->elf.srelbss == NULL
4979 || htab->elf.sreldynrelro == NULL)
4982 rel.r_offset = (h->root.u.def.value
4983 + h->root.u.def.section->output_section->vma
4984 + h->root.u.def.section->output_offset);
4985 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4986 if (h->root.u.def.section == htab->elf.sdynrelro)
4987 s = htab->elf.sreldynrelro;
4989 s = htab->elf.srelbss;
4990 elf_append_rel (output_bfd, s, &rel);
4996 /* Finish up local dynamic symbol handling. We set the contents of
4997 various dynamic sections here. */
5000 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5002 struct elf_link_hash_entry *h
5003 = (struct elf_link_hash_entry *) *slot;
5004 struct bfd_link_info *info
5005 = (struct bfd_link_info *) inf;
5007 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5011 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5012 here since undefined weak symbol may not be dynamic and may not be
5013 called for elf_i386_finish_dynamic_symbol. */
5016 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5019 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5020 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5022 if (h->root.type != bfd_link_hash_undefweak
5023 || h->dynindx != -1)
5026 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5030 /* Used to decide how to sort relocs in an optimal manner for the
5031 dynamic linker, before writing them out. */
5033 static enum elf_reloc_type_class
5034 elf_i386_reloc_type_class (const struct bfd_link_info *info,
5035 const asection *rel_sec ATTRIBUTE_UNUSED,
5036 const Elf_Internal_Rela *rela)
5038 bfd *abfd = info->output_bfd;
5039 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5040 struct elf_link_hash_table *htab = elf_hash_table (info);
5042 if (htab->dynsym != NULL
5043 && htab->dynsym->contents != NULL)
5045 /* Check relocation against STT_GNU_IFUNC symbol if there are
5047 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5048 if (r_symndx != STN_UNDEF)
5050 Elf_Internal_Sym sym;
5051 if (!bed->s->swap_symbol_in (abfd,
5052 (htab->dynsym->contents
5053 + r_symndx * sizeof (Elf32_External_Sym)),
5057 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5058 return reloc_class_ifunc;
5062 switch (ELF32_R_TYPE (rela->r_info))
5064 case R_386_IRELATIVE:
5065 return reloc_class_ifunc;
5066 case R_386_RELATIVE:
5067 return reloc_class_relative;
5068 case R_386_JUMP_SLOT:
5069 return reloc_class_plt;
5071 return reloc_class_copy;
5073 return reloc_class_normal;
5077 /* Finish up the dynamic sections. */
5080 elf_i386_finish_dynamic_sections (bfd *output_bfd,
5081 struct bfd_link_info *info)
5083 struct elf_x86_link_hash_table *htab;
5086 const struct elf_i386_backend_data *abed;
5088 htab = elf_x86_hash_table (info, I386_ELF_DATA);
5092 dynobj = htab->elf.dynobj;
5093 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5094 abed = get_elf_i386_backend_data (output_bfd);
5096 if (htab->elf.dynamic_sections_created)
5098 Elf32_External_Dyn *dyncon, *dynconend;
5100 if (sdyn == NULL || htab->elf.sgot == NULL)
5103 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5104 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5105 for (; dyncon < dynconend; dyncon++)
5107 Elf_Internal_Dyn dyn;
5110 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5115 if (htab->is_vxworks
5116 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5121 s = htab->elf.sgotplt;
5122 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5126 s = htab->elf.srelplt;
5127 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5131 s = htab->elf.srelplt;
5132 dyn.d_un.d_val = s->size;
5136 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5139 if (htab->elf.splt && htab->elf.splt->size > 0)
5141 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5142 really seem like the right value. */
5143 elf_section_data (htab->elf.splt->output_section)
5144 ->this_hdr.sh_entsize = 4;
5146 if (htab->plt.has_plt0)
5148 /* Fill in the special first entry in the procedure linkage
5150 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
5151 htab->lazy_plt->plt0_entry_size);
5152 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
5153 abed->plt0_pad_byte,
5154 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
5155 if (!bfd_link_pic (info))
5157 bfd_put_32 (output_bfd,
5158 (htab->elf.sgotplt->output_section->vma
5159 + htab->elf.sgotplt->output_offset
5161 htab->elf.splt->contents
5162 + htab->lazy_plt->plt0_got1_offset);
5163 bfd_put_32 (output_bfd,
5164 (htab->elf.sgotplt->output_section->vma
5165 + htab->elf.sgotplt->output_offset
5167 htab->elf.splt->contents
5168 + htab->lazy_plt->plt0_got2_offset);
5170 if (htab->is_vxworks)
5172 Elf_Internal_Rela rel;
5173 int num_plts = (htab->elf.splt->size
5174 / htab->plt.plt_entry_size) - 1;
5176 asection *srelplt2 = htab->srelplt2;
5178 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5179 + 4. On IA32 we use REL relocations so the
5180 addend goes in the PLT directly. */
5181 rel.r_offset = (htab->elf.splt->output_section->vma
5182 + htab->elf.splt->output_offset
5183 + htab->lazy_plt->plt0_got1_offset);
5184 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5186 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5187 srelplt2->contents);
5188 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5190 rel.r_offset = (htab->elf.splt->output_section->vma
5191 + htab->elf.splt->output_offset
5192 + htab->lazy_plt->plt0_got2_offset);
5193 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5195 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5196 srelplt2->contents +
5197 sizeof (Elf32_External_Rel));
5198 /* Correct the .rel.plt.unloaded relocations. */
5199 p = srelplt2->contents;
5200 if (bfd_link_pic (info))
5201 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5203 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5205 for (; num_plts; num_plts--)
5207 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5208 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5210 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5211 p += sizeof (Elf32_External_Rel);
5213 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5214 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
5216 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5217 p += sizeof (Elf32_External_Rel);
5224 if (htab->plt_got != NULL && htab->plt_got->size > 0)
5225 elf_section_data (htab->plt_got->output_section)
5226 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
5228 if (htab->plt_second != NULL && htab->plt_second->size > 0)
5229 elf_section_data (htab->plt_second->output_section)
5230 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
5233 /* Fill in the first three entries in the global offset table. */
5234 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
5236 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5239 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5243 bfd_put_32 (output_bfd,
5245 : sdyn->output_section->vma + sdyn->output_offset),
5246 htab->elf.sgotplt->contents);
5247 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5248 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5250 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5253 /* Adjust .eh_frame for .plt section. */
5254 if (htab->plt_eh_frame != NULL
5255 && htab->plt_eh_frame->contents != NULL)
5257 if (htab->elf.splt != NULL
5258 && htab->elf.splt->size != 0
5259 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5260 && htab->elf.splt->output_section != NULL
5261 && htab->plt_eh_frame->output_section != NULL)
5263 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5264 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5265 + htab->plt_eh_frame->output_offset
5266 + PLT_FDE_START_OFFSET;
5267 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5268 htab->plt_eh_frame->contents
5269 + PLT_FDE_START_OFFSET);
5271 if (htab->plt_eh_frame->sec_info_type
5272 == SEC_INFO_TYPE_EH_FRAME)
5274 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5276 htab->plt_eh_frame->contents))
5281 /* Adjust .eh_frame for .plt.got section. */
5282 if (htab->plt_got_eh_frame != NULL
5283 && htab->plt_got_eh_frame->contents != NULL)
5285 if (htab->plt_got != NULL
5286 && htab->plt_got->size != 0
5287 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
5288 && htab->plt_got->output_section != NULL
5289 && htab->plt_got_eh_frame->output_section != NULL)
5291 bfd_vma plt_start = htab->plt_got->output_section->vma;
5292 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
5293 + htab->plt_got_eh_frame->output_offset
5294 + PLT_FDE_START_OFFSET;
5295 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5296 htab->plt_got_eh_frame->contents
5297 + PLT_FDE_START_OFFSET);
5299 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5301 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5302 htab->plt_got_eh_frame,
5303 htab->plt_got_eh_frame->contents))
5308 /* Adjust .eh_frame for the second PLT section. */
5309 if (htab->plt_second_eh_frame != NULL
5310 && htab->plt_second_eh_frame->contents != NULL)
5312 if (htab->plt_second != NULL
5313 && htab->plt_second->size != 0
5314 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
5315 && htab->plt_second->output_section != NULL
5316 && htab->plt_second_eh_frame->output_section != NULL)
5318 bfd_vma plt_start = htab->plt_second->output_section->vma;
5319 bfd_vma eh_frame_start
5320 = (htab->plt_second_eh_frame->output_section->vma
5321 + htab->plt_second_eh_frame->output_offset
5322 + PLT_FDE_START_OFFSET);
5323 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5324 htab->plt_second_eh_frame->contents
5325 + PLT_FDE_START_OFFSET);
5327 if (htab->plt_second_eh_frame->sec_info_type
5328 == SEC_INFO_TYPE_EH_FRAME)
5330 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5331 htab->plt_second_eh_frame,
5332 htab->plt_second_eh_frame->contents))
5337 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5338 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5340 /* Fill PLT entries for undefined weak symbols in PIE. */
5341 if (bfd_link_pie (info))
5342 bfd_hash_traverse (&info->hash->table,
5343 elf_i386_pie_finish_undefweak_symbol,
5349 /* Fill PLT/GOT entries and allocate dynamic relocations for local
5350 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5351 It has to be done before elf_link_sort_relocs is called so that
5352 dynamic relocations are properly sorted. */
5355 elf_i386_output_arch_local_syms
5356 (bfd *output_bfd ATTRIBUTE_UNUSED,
5357 struct bfd_link_info *info,
5358 void *flaginfo ATTRIBUTE_UNUSED,
5359 int (*func) (void *, const char *,
5362 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
5364 struct elf_x86_link_hash_table *htab
5365 = elf_x86_hash_table (info, I386_ELF_DATA);
5369 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5370 htab_traverse (htab->loc_hash_table,
5371 elf_i386_finish_local_dynamic_symbol,
5377 /* Forward declaration. */
5378 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
5380 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
5381 dynamic relocations. */
5384 elf_i386_get_synthetic_symtab (bfd *abfd,
5385 long symcount ATTRIBUTE_UNUSED,
5386 asymbol **syms ATTRIBUTE_UNUSED,
5393 bfd_byte *plt_contents;
5395 const struct elf_x86_lazy_plt_layout *lazy_plt;
5396 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
5397 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
5398 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
5401 enum elf_x86_plt_type plt_type;
5402 struct elf_x86_plt plts[] =
5404 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
5405 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
5406 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
5407 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
5412 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
5415 if (dynsymcount <= 0)
5418 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
5422 non_lazy_plt = NULL;
5423 /* Silence GCC 6. */
5425 non_lazy_ibt_plt = NULL;
5426 lazy_ibt_plt = NULL;
5427 switch (get_elf_i386_backend_data (abfd)->os)
5430 non_lazy_plt = &elf_i386_non_lazy_plt;
5431 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5432 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
5435 lazy_plt = &elf_i386_lazy_plt;
5438 lazy_plt = &elf_i386_nacl_plt;
5445 for (j = 0; plts[j].name != NULL; j++)
5447 plt = bfd_get_section_by_name (abfd, plts[j].name);
5448 if (plt == NULL || plt->size == 0)
5451 /* Get the PLT section contents. */
5452 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5453 if (plt_contents == NULL)
5455 if (!bfd_get_section_contents (abfd, (asection *) plt,
5456 plt_contents, 0, plt->size))
5458 free (plt_contents);
5462 /* Check what kind of PLT it is. */
5463 plt_type = plt_unknown;
5464 if (plts[j].type == plt_unknown
5465 && (plt->size >= (lazy_plt->plt0_entry_size
5466 + lazy_plt->plt_entry_size)))
5468 /* Match lazy PLT first. */
5469 if (memcmp (plt_contents, lazy_plt->plt0_entry,
5470 lazy_plt->plt0_got1_offset) == 0)
5472 /* The fist entry in the lazy IBT PLT is the same as the
5474 if (lazy_ibt_plt != NULL
5475 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
5476 lazy_ibt_plt->plt_entry,
5477 lazy_ibt_plt->plt_got_offset) == 0))
5478 plt_type = plt_lazy | plt_second;
5480 plt_type = plt_lazy;
5482 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
5483 lazy_plt->plt0_got1_offset) == 0)
5485 /* The fist entry in the PIC lazy IBT PLT is the same as
5486 the normal PIC lazy PLT. */
5487 if (lazy_ibt_plt != NULL
5488 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
5489 lazy_ibt_plt->pic_plt_entry,
5490 lazy_ibt_plt->plt_got_offset) == 0))
5491 plt_type = plt_lazy | plt_pic | plt_second;
5493 plt_type = plt_lazy | plt_pic;
5497 if (non_lazy_plt != NULL
5498 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
5499 && plt->size >= non_lazy_plt->plt_entry_size)
5501 /* Match non-lazy PLT. */
5502 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
5503 non_lazy_plt->plt_got_offset) == 0)
5504 plt_type = plt_non_lazy;
5505 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
5506 non_lazy_plt->plt_got_offset) == 0)
5510 if ((non_lazy_ibt_plt != NULL)
5511 && (plt_type == plt_unknown || plt_type == plt_second)
5512 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
5514 if (memcmp (plt_contents,
5515 non_lazy_ibt_plt->plt_entry,
5516 non_lazy_ibt_plt->plt_got_offset) == 0)
5518 /* Match IBT PLT. */
5519 plt_type = plt_second;
5520 non_lazy_plt = non_lazy_ibt_plt;
5522 else if (memcmp (plt_contents,
5523 non_lazy_ibt_plt->pic_plt_entry,
5524 non_lazy_ibt_plt->plt_got_offset) == 0)
5526 /* Match PIC IBT PLT. */
5527 plt_type = plt_second | plt_pic;
5528 non_lazy_plt = non_lazy_ibt_plt;
5532 if (plt_type == plt_unknown)
5534 free (plt_contents);
5539 plts[j].type = plt_type;
5541 if ((plt_type & plt_lazy))
5543 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
5544 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
5545 /* Skip PLT0 in lazy PLT. */
5550 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
5551 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
5555 /* Skip lazy PLT when the second PLT is used. */
5556 if ((plt_type & (plt_lazy | plt_second))
5557 == (plt_lazy | plt_second))
5561 n = plt->size / plts[j].plt_entry_size;
5566 plts[j].contents = plt_contents;
5568 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
5569 if ((plt_type & plt_pic))
5570 got_addr = (bfd_vma) -1;
5573 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
5574 got_addr, plts, dynsyms,
5578 /* Set up i386 GNU properties. Return the first relocatable ELF input
5579 with GNU properties if found. Otherwise, return NULL. */
5582 elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
5584 struct elf_x86_plt_layout_table plt_layout;
5586 plt_layout.normal_target = FALSE;
5587 plt_layout.is_vxworks = FALSE;
5588 switch (get_elf_i386_backend_data (info->output_bfd)->os)
5591 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5592 plt_layout.non_lazy_plt = &elf_i386_non_lazy_plt;
5593 plt_layout.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5594 plt_layout.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
5595 plt_layout.normal_target = TRUE;
5598 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5599 plt_layout.non_lazy_plt = NULL;
5600 plt_layout.lazy_ibt_plt = NULL;
5601 plt_layout.non_lazy_ibt_plt = NULL;
5602 plt_layout.is_vxworks = TRUE;
5605 plt_layout.lazy_plt = &elf_i386_nacl_plt;
5606 plt_layout.non_lazy_plt = NULL;
5607 plt_layout.lazy_ibt_plt = NULL;
5608 plt_layout.non_lazy_ibt_plt = NULL;
5612 return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout);
5615 #define TARGET_LITTLE_SYM i386_elf32_vec
5616 #define TARGET_LITTLE_NAME "elf32-i386"
5617 #define ELF_ARCH bfd_arch_i386
5618 #define ELF_TARGET_ID I386_ELF_DATA
5619 #define ELF_MACHINE_CODE EM_386
5620 #define ELF_MAXPAGESIZE 0x1000
5622 #define elf_backend_can_gc_sections 1
5623 #define elf_backend_can_refcount 1
5624 #define elf_backend_want_got_plt 1
5625 #define elf_backend_plt_readonly 1
5626 #define elf_backend_want_plt_sym 0
5627 #define elf_backend_got_header_size 12
5628 #define elf_backend_plt_alignment 4
5629 #define elf_backend_dtrel_excludes_plt 1
5630 #define elf_backend_extern_protected_data 1
5631 #define elf_backend_caches_rawsize 1
5632 #define elf_backend_want_dynrelro 1
5634 /* Support RELA for objdump of prelink objects. */
5635 #define elf_info_to_howto elf_i386_info_to_howto_rel
5636 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5638 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5639 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5640 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5641 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5643 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5644 #define elf_backend_check_relocs elf_i386_check_relocs
5645 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5646 #define elf_backend_fake_sections elf_i386_fake_sections
5647 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5648 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5649 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
5650 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5651 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5652 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5653 #define elf_backend_relocate_section elf_i386_relocate_section
5654 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5655 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
5657 #include "elf32-target.h"
5659 /* FreeBSD support. */
5661 #undef TARGET_LITTLE_SYM
5662 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5663 #undef TARGET_LITTLE_NAME
5664 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5666 #define ELF_OSABI ELFOSABI_FREEBSD
5668 /* The kernel recognizes executables as valid only if they carry a
5669 "FreeBSD" label in the ELF header. So we put this label on all
5670 executables and (for simplicity) also all other object files. */
5673 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5675 _bfd_elf_post_process_headers (abfd, info);
5677 #ifdef OLD_FREEBSD_ABI_LABEL
5679 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5680 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5681 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5686 #undef elf_backend_post_process_headers
5687 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5689 #define elf32_bed elf32_i386_fbsd_bed
5691 #undef elf_backend_add_symbol_hook
5693 #include "elf32-target.h"
5697 #undef TARGET_LITTLE_SYM
5698 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5699 #undef TARGET_LITTLE_NAME
5700 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5702 #undef elf_backend_post_process_headers
5704 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5705 objects won't be recognized. */
5709 #define elf32_bed elf32_i386_sol2_bed
5711 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5713 #undef elf_backend_static_tls_alignment
5714 #define elf_backend_static_tls_alignment 8
5716 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5718 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5720 #undef elf_backend_want_plt_sym
5721 #define elf_backend_want_plt_sym 1
5723 #undef elf_backend_strtab_flags
5724 #define elf_backend_strtab_flags SHF_STRINGS
5726 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
5727 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5728 FALSE otherwise. ISECTION is the best guess matching section from the
5729 input bfd IBFD, but it might be NULL. */
5732 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
5733 bfd *obfd ATTRIBUTE_UNUSED,
5734 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
5735 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
5737 /* PR 19938: FIXME: Need to add code for setting the sh_info
5738 and sh_link fields of Solaris specific section types. */
5741 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
5742 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
5744 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
5746 The following values should be set:
5749 -----------------------------------------------------------------------------
5750 SHT_SUNW_ancillary The section header index of 0
5751 [0x6fffffee] the associated string table.
5753 SHT_SUNW_capinfo The section header index of For a dynamic object, the
5754 [0x6ffffff0] the associated symbol table. section header index of
5756 SHT_SUNW_capchain table,
5759 SHT_SUNW_symsort The section header index of 0
5760 [0x6ffffff1] the associated symbol table.
5762 SHT_SUNW_tlssort The section header index of 0
5763 [0x6ffffff2] the associated symbol table.
5765 SHT_SUNW_LDYNSYM The section header index of One greater than the
5766 [0x6ffffff3] the associated string table. symbol table index of the
5767 This index is the same string last local symbol,
5768 table used by the SHT_DYNSYM STB_LOCAL. Since
5769 section. SHT_SUNW_LDYNSYM only
5770 contains local symbols,
5771 sh_info is equivalent to
5772 the number of symbols in
5775 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
5776 [0x6ffffff5] the section header index of to named strings, the
5777 the associated section header index of
5778 SHT_SUNW_capinfo table, the associated string
5779 otherwise 0. table, otherwise 0.
5781 SHT_SUNW_move The section header index of 0
5782 [0x6ffffffa] the associated symbol table.
5787 SHT_SUNW_syminfo The section header index of The section header index
5788 [0x6ffffffc] the associated symbol table. of the associated
5791 SHT_SUNW_verdef The section header index of The number of version
5792 [0x6ffffffd] the associated string table. definitions within the
5795 SHT_SUNW_verneed The section header index of The number of version
5796 [0x6ffffffe] the associated string table. dependencies within the
5799 SHT_SUNW_versym The section header index of 0
5800 [0x6fffffff] the associated symbol table. */
5803 #undef elf_backend_copy_special_section_fields
5804 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
5806 #include "elf32-target.h"
5808 /* Intel MCU support. */
5811 elf32_iamcu_elf_object_p (bfd *abfd)
5813 /* Set the right machine number for an IAMCU elf32 file. */
5814 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5818 #undef TARGET_LITTLE_SYM
5819 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5820 #undef TARGET_LITTLE_NAME
5821 #define TARGET_LITTLE_NAME "elf32-iamcu"
5823 #define ELF_ARCH bfd_arch_iamcu
5825 #undef ELF_MACHINE_CODE
5826 #define ELF_MACHINE_CODE EM_IAMCU
5831 #define elf32_bed elf32_iamcu_bed
5833 #undef elf_backend_object_p
5834 #define elf_backend_object_p elf32_iamcu_elf_object_p
5836 #undef elf_backend_static_tls_alignment
5838 #undef elf_backend_want_plt_sym
5839 #define elf_backend_want_plt_sym 0
5841 #undef elf_backend_strtab_flags
5842 #undef elf_backend_copy_special_section_fields
5844 #include "elf32-target.h"
5846 /* Restore defaults. */
5848 #define ELF_ARCH bfd_arch_i386
5849 #undef ELF_MACHINE_CODE
5850 #define ELF_MACHINE_CODE EM_386
5852 /* Native Client support. */
5854 #undef TARGET_LITTLE_SYM
5855 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5856 #undef TARGET_LITTLE_NAME
5857 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5859 #define elf32_bed elf32_i386_nacl_bed
5861 #undef ELF_MAXPAGESIZE
5862 #define ELF_MAXPAGESIZE 0x10000
5864 /* Restore defaults. */
5866 #undef elf_backend_want_plt_sym
5867 #define elf_backend_want_plt_sym 0
5868 #undef elf_backend_post_process_headers
5869 #undef elf_backend_static_tls_alignment
5871 /* NaCl uses substantially different PLT entries for the same effects. */
5873 #undef elf_backend_plt_alignment
5874 #define elf_backend_plt_alignment 5
5875 #define NACL_PLT_ENTRY_SIZE 64
5876 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5878 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5880 0xff, 0x35, /* pushl contents of address */
5881 0, 0, 0, 0, /* replaced with address of .got + 4. */
5882 0x8b, 0x0d, /* movl contents of address, %ecx */
5883 0, 0, 0, 0, /* replaced with address of .got + 8. */
5884 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5885 0xff, 0xe1 /* jmp *%ecx */
5888 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5890 0x8b, 0x0d, /* movl contents of address, %ecx */
5891 0, 0, 0, 0, /* replaced with GOT slot address. */
5892 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5893 0xff, 0xe1, /* jmp *%ecx */
5895 /* Pad to the next 32-byte boundary with nop instructions. */
5897 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5898 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5900 /* Lazy GOT entries point here (32-byte aligned). */
5901 0x68, /* pushl immediate */
5902 0, 0, 0, 0, /* replaced with reloc offset. */
5903 0xe9, /* jmp relative */
5904 0, 0, 0, 0, /* replaced with offset to .plt. */
5906 /* Pad to the next 32-byte boundary with nop instructions. */
5907 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5908 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5912 static const bfd_byte
5913 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5915 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5916 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5917 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5918 0xff, 0xe1, /* jmp *%ecx */
5920 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5921 so pad to that size with nop instructions. */
5922 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5925 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5927 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5928 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5929 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5930 0xff, 0xe1, /* jmp *%ecx */
5932 /* Pad to the next 32-byte boundary with nop instructions. */
5934 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5935 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5937 /* Lazy GOT entries point here (32-byte aligned). */
5938 0x68, /* pushl immediate */
5939 0, 0, 0, 0, /* replaced with offset into relocation table. */
5940 0xe9, /* jmp relative */
5941 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5943 /* Pad to the next 32-byte boundary with nop instructions. */
5944 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5945 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5949 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5951 #if (PLT_CIE_LENGTH != 20 \
5952 || PLT_FDE_LENGTH != 36 \
5953 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5954 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5955 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5957 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5958 0, 0, 0, 0, /* CIE ID */
5959 1, /* CIE version */
5960 'z', 'R', 0, /* Augmentation string */
5961 1, /* Code alignment factor */
5962 0x7c, /* Data alignment factor: -4 */
5963 8, /* Return address column */
5964 1, /* Augmentation size */
5965 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5966 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5967 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5968 DW_CFA_nop, DW_CFA_nop,
5970 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5971 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5972 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5973 0, 0, 0, 0, /* .plt size goes here */
5974 0, /* Augmentation size */
5975 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5976 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5977 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5978 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5979 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5980 13, /* Block length */
5981 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5982 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5983 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5984 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5985 DW_CFA_nop, DW_CFA_nop
5988 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
5990 elf_i386_nacl_plt0_entry, /* plt0_entry */
5991 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5992 elf_i386_nacl_plt_entry, /* plt_entry */
5993 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5994 2, /* plt0_got1_offset */
5995 8, /* plt0_got2_offset */
5996 0, /* plt0_got2_insn_end */
5997 2, /* plt_got_offset */
5998 33, /* plt_reloc_offset */
5999 38, /* plt_plt_offset */
6000 0, /* plt_got_insn_size */
6001 0, /* plt_plt_insn_end */
6002 32, /* plt_lazy_offset */
6003 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6004 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6005 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
6006 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
6009 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6011 0x90, /* plt0_pad_byte: nop insn */
6016 elf32_i386_nacl_elf_object_p (bfd *abfd)
6018 /* Set the right machine number for a NaCl i386 ELF32 file. */
6019 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6023 #undef elf_backend_arch_data
6024 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6026 #undef elf_backend_object_p
6027 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6028 #undef elf_backend_modify_segment_map
6029 #define elf_backend_modify_segment_map nacl_modify_segment_map
6030 #undef elf_backend_modify_program_headers
6031 #define elf_backend_modify_program_headers nacl_modify_program_headers
6032 #undef elf_backend_final_write_processing
6033 #define elf_backend_final_write_processing nacl_final_write_processing
6035 #include "elf32-target.h"
6037 /* Restore defaults. */
6038 #undef elf_backend_object_p
6039 #undef elf_backend_modify_segment_map
6040 #undef elf_backend_modify_program_headers
6041 #undef elf_backend_final_write_processing
6043 /* VxWorks support. */
6045 #undef TARGET_LITTLE_SYM
6046 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6047 #undef TARGET_LITTLE_NAME
6048 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6050 #undef ELF_MAXPAGESIZE
6051 #define ELF_MAXPAGESIZE 0x1000
6052 #undef elf_backend_plt_alignment
6053 #define elf_backend_plt_alignment 4
6055 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6057 0x90, /* plt0_pad_byte */
6061 #undef elf_backend_arch_data
6062 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6064 #undef elf_backend_relocs_compatible
6065 #undef elf_backend_add_symbol_hook
6066 #define elf_backend_add_symbol_hook \
6067 elf_vxworks_add_symbol_hook
6068 #undef elf_backend_link_output_symbol_hook
6069 #define elf_backend_link_output_symbol_hook \
6070 elf_vxworks_link_output_symbol_hook
6071 #undef elf_backend_emit_relocs
6072 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6073 #undef elf_backend_final_write_processing
6074 #define elf_backend_final_write_processing \
6075 elf_vxworks_final_write_processing
6076 #undef elf_backend_static_tls_alignment
6078 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6080 #undef elf_backend_want_plt_sym
6081 #define elf_backend_want_plt_sym 1
6084 #define elf32_bed elf32_i386_vxworks_bed
6086 #include "elf32-target.h"