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 /* Return TRUE if the TLS access code sequence support transition
865 elf_i386_check_tls_transition (asection *sec,
867 Elf_Internal_Shdr *symtab_hdr,
868 struct elf_link_hash_entry **sym_hashes,
870 const Elf_Internal_Rela *rel,
871 const Elf_Internal_Rela *relend)
873 unsigned int val, type, reg;
874 unsigned long r_symndx;
875 struct elf_link_hash_entry *h;
878 bfd_boolean indirect_call;
880 offset = rel->r_offset;
885 if (offset < 2 || (rel + 1) >= relend)
888 indirect_call = FALSE;
889 call = contents + offset + 4;
892 if (r_type == R_386_TLS_GD)
894 /* Check transition from GD access model. Only
895 leal foo@tlsgd(,%ebx,1), %eax
896 call ___tls_get_addr@PLT
898 leal foo@tlsgd(%ebx) %eax
899 call ___tls_get_addr@PLT
902 leal foo@tlsgd(%reg), %eax
903 call *___tls_get_addr@GOT(%reg)
904 which may be converted to
905 addr32 call ___tls_get_addr
906 can transit to different access model. */
907 if ((offset + 10) > sec->size
908 || (type != 0x8d && type != 0x04))
913 /* leal foo@tlsgd(,%ebx,1), %eax
914 call ___tls_get_addr@PLT */
918 if (*(call - 7) != 0x8d
926 leal foo@tlsgd(%ebx), %eax
927 call ___tls_get_addr@PLT
930 leal foo@tlsgd(%reg), %eax
931 call *___tls_get_addr@GOT(%reg)
932 which may be converted to
933 addr32 call ___tls_get_addr
935 %eax can't be used as the GOT base register since it
936 is used to pass parameter to ___tls_get_addr. */
938 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
941 indirect_call = call[0] == 0xff;
942 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
943 && !(call[0] == 0x67 && call[1] == 0xe8)
945 && (call[1] & 0xf8) == 0x90
946 && (call[1] & 0x7) == reg))
952 /* Check transition from LD access model. Only
953 leal foo@tlsldm(%ebx), %eax
954 call ___tls_get_addr@PLT
956 leal foo@tlsldm(%reg), %eax
957 call *___tls_get_addr@GOT(%reg)
958 which may be converted to
959 addr32 call ___tls_get_addr
960 can transit to different access model. */
961 if (type != 0x8d || (offset + 9) > sec->size)
964 /* %eax can't be used as the GOT base register since it is
965 used to pass parameter to ___tls_get_addr. */
967 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
970 indirect_call = call[0] == 0xff;
971 if (!(reg == 3 && call[0] == 0xe8)
972 && !(call[0] == 0x67 && call[1] == 0xe8)
974 && (call[1] & 0xf8) == 0x90
975 && (call[1] & 0x7) == reg))
979 r_symndx = ELF32_R_SYM (rel[1].r_info);
980 if (r_symndx < symtab_hdr->sh_info)
983 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
985 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
987 else if (indirect_call)
988 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
990 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
991 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
994 /* Check transition from IE access model:
995 movl foo@indntpoff(%rip), %eax
996 movl foo@indntpoff(%rip), %reg
997 addl foo@indntpoff(%rip), %reg
1000 if (offset < 1 || (offset + 4) > sec->size)
1003 /* Check "movl foo@tpoff(%rip), %eax" first. */
1004 val = bfd_get_8 (abfd, contents + offset - 1);
1011 /* Check movl|addl foo@tpoff(%rip), %reg. */
1012 type = bfd_get_8 (abfd, contents + offset - 2);
1013 return ((type == 0x8b || type == 0x03)
1014 && (val & 0xc7) == 0x05);
1016 case R_386_TLS_GOTIE:
1017 case R_386_TLS_IE_32:
1018 /* Check transition from {IE_32,GOTIE} access model:
1019 subl foo@{tpoff,gontoff}(%reg1), %reg2
1020 movl foo@{tpoff,gontoff}(%reg1), %reg2
1021 addl foo@{tpoff,gontoff}(%reg1), %reg2
1024 if (offset < 2 || (offset + 4) > sec->size)
1027 val = bfd_get_8 (abfd, contents + offset - 1);
1028 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1031 type = bfd_get_8 (abfd, contents + offset - 2);
1032 return type == 0x8b || type == 0x2b || type == 0x03;
1034 case R_386_TLS_GOTDESC:
1035 /* Check transition from GDesc access model:
1036 leal x@tlsdesc(%ebx), %eax
1038 Make sure it's a leal adding ebx to a 32-bit offset
1039 into any register, although it's probably almost always
1042 if (offset < 2 || (offset + 4) > sec->size)
1045 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1048 val = bfd_get_8 (abfd, contents + offset - 1);
1049 return (val & 0xc7) == 0x83;
1051 case R_386_TLS_DESC_CALL:
1052 /* Check transition from GDesc access model:
1053 call *x@tlsdesc(%eax)
1055 if (offset + 2 <= sec->size)
1057 /* Make sure that it's a call *x@tlsdesc(%eax). */
1058 call = contents + offset;
1059 return call[0] == 0xff && call[1] == 0x10;
1069 /* Return TRUE if the TLS access transition is OK or no transition
1070 will be performed. Update R_TYPE if there is a transition. */
1073 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1074 asection *sec, bfd_byte *contents,
1075 Elf_Internal_Shdr *symtab_hdr,
1076 struct elf_link_hash_entry **sym_hashes,
1077 unsigned int *r_type, int tls_type,
1078 const Elf_Internal_Rela *rel,
1079 const Elf_Internal_Rela *relend,
1080 struct elf_link_hash_entry *h,
1081 unsigned long r_symndx,
1082 bfd_boolean from_relocate_section)
1084 unsigned int from_type = *r_type;
1085 unsigned int to_type = from_type;
1086 bfd_boolean check = TRUE;
1088 /* Skip TLS transition for functions. */
1090 && (h->type == STT_FUNC
1091 || h->type == STT_GNU_IFUNC))
1097 case R_386_TLS_GOTDESC:
1098 case R_386_TLS_DESC_CALL:
1099 case R_386_TLS_IE_32:
1101 case R_386_TLS_GOTIE:
1102 if (bfd_link_executable (info))
1105 to_type = R_386_TLS_LE_32;
1106 else if (from_type != R_386_TLS_IE
1107 && from_type != R_386_TLS_GOTIE)
1108 to_type = R_386_TLS_IE_32;
1111 /* When we are called from elf_i386_relocate_section, there may
1112 be additional transitions based on TLS_TYPE. */
1113 if (from_relocate_section)
1115 unsigned int new_to_type = to_type;
1117 if (bfd_link_executable (info)
1120 && (tls_type & GOT_TLS_IE))
1121 new_to_type = R_386_TLS_LE_32;
1123 if (to_type == R_386_TLS_GD
1124 || to_type == R_386_TLS_GOTDESC
1125 || to_type == R_386_TLS_DESC_CALL)
1127 if (tls_type == GOT_TLS_IE_POS)
1128 new_to_type = R_386_TLS_GOTIE;
1129 else if (tls_type & GOT_TLS_IE)
1130 new_to_type = R_386_TLS_IE_32;
1133 /* We checked the transition before when we were called from
1134 elf_i386_check_relocs. We only want to check the new
1135 transition which hasn't been checked before. */
1136 check = new_to_type != to_type && from_type == to_type;
1137 to_type = new_to_type;
1143 if (bfd_link_executable (info))
1144 to_type = R_386_TLS_LE_32;
1151 /* Return TRUE if there is no transition. */
1152 if (from_type == to_type)
1155 /* Check if the transition can be performed. */
1157 && ! elf_i386_check_tls_transition (sec, contents,
1158 symtab_hdr, sym_hashes,
1159 from_type, rel, relend))
1161 reloc_howto_type *from, *to;
1164 from = elf_i386_rtype_to_howto (abfd, from_type);
1165 to = elf_i386_rtype_to_howto (abfd, to_type);
1168 name = h->root.root.string;
1171 struct elf_x86_link_hash_table *htab;
1173 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1178 Elf_Internal_Sym *isym;
1180 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1182 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1187 /* xgettext:c-format */
1188 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1189 "in section `%A' failed"),
1190 abfd, from->name, to->name, name,
1191 rel->r_offset, sec);
1192 bfd_set_error (bfd_error_bad_value);
1200 /* With the local symbol, foo, we convert
1201 mov foo@GOT[(%reg1)], %reg2
1203 lea foo[@GOTOFF(%reg1)], %reg2
1205 call/jmp *foo@GOT[(%reg)]
1207 nop call foo/jmp foo nop
1208 When PIC is false, convert
1209 test %reg1, foo@GOT[(%reg2)]
1213 binop foo@GOT[(%reg1)], %reg2
1216 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1221 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1223 Elf_Internal_Rela *irel,
1224 struct elf_link_hash_entry *h,
1225 bfd_boolean *converted,
1226 struct bfd_link_info *link_info)
1228 struct elf_x86_link_hash_table *htab;
1229 unsigned int opcode;
1231 bfd_boolean baseless;
1232 Elf_Internal_Sym *isym;
1233 unsigned int addend;
1237 bfd_boolean to_reloc_32;
1238 unsigned int r_type;
1239 unsigned int r_symndx;
1240 bfd_vma roff = irel->r_offset;
1245 /* Addend for R_386_GOT32X relocations must be 0. */
1246 addend = bfd_get_32 (abfd, contents + roff);
1250 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
1251 is_pic = bfd_link_pic (link_info);
1253 r_type = ELF32_R_TYPE (irel->r_info);
1254 r_symndx = ELF32_R_SYM (irel->r_info);
1256 modrm = bfd_get_8 (abfd, contents + roff - 1);
1257 baseless = (modrm & 0xc7) == 0x5;
1259 if (baseless && is_pic)
1261 /* For PIC, disallow R_386_GOT32X without a base register
1262 since we don't know what the GOT base is. */
1267 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1269 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1272 name = h->root.root.string;
1275 /* xgettext:c-format */
1276 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1277 " register can not be used when making a shared object"),
1282 opcode = bfd_get_8 (abfd, contents + roff - 2);
1284 /* Convert to R_386_32 if PIC is false or there is no base
1286 to_reloc_32 = !is_pic || baseless;
1288 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1292 if (opcode == 0x0ff)
1293 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1294 goto convert_branch;
1296 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1297 "test %reg1, foo@GOT(%reg2)" and
1298 "binop foo@GOT[(%reg1)], %reg2". */
1302 /* Undefined weak symbol is only bound locally in executable
1303 and its reference is resolved as 0. */
1304 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, I386_ELF_DATA, TRUE,
1305 elf_x86_hash_entry (h)))
1309 /* No direct branch to 0 for PIC. */
1313 goto convert_branch;
1317 /* We can convert load of address 0 to R_386_32. */
1325 /* We have "call/jmp *foo@GOT[(%reg)]". */
1326 if ((h->root.type == bfd_link_hash_defined
1327 || h->root.type == bfd_link_hash_defweak)
1328 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1330 /* The function is locally defined. */
1332 /* Convert R_386_GOT32X to R_386_PC32. */
1333 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1335 struct elf_x86_link_hash_entry *eh
1336 = (struct elf_x86_link_hash_entry *) h;
1338 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1341 /* To support TLS optimization, always use addr32 prefix
1342 for "call *___tls_get_addr@GOT(%reg)". */
1343 if (eh && eh->tls_get_addr)
1346 nop_offset = irel->r_offset - 2;
1350 nop = link_info->call_nop_byte;
1351 if (link_info->call_nop_as_suffix)
1353 nop_offset = roff + 3;
1354 irel->r_offset -= 1;
1357 nop_offset = roff - 2;
1362 /* Convert to "jmp foo nop". */
1365 nop_offset = roff + 3;
1366 irel->r_offset -= 1;
1369 bfd_put_8 (abfd, nop, contents + nop_offset);
1370 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1371 /* When converting to PC-relative relocation, we
1372 need to adjust addend by -4. */
1373 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1374 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1381 /* We have "mov foo@GOT[(%re1g)], %reg2",
1382 "test %reg1, foo@GOT(%reg2)" and
1383 "binop foo@GOT[(%reg1)], %reg2".
1385 Avoid optimizing _DYNAMIC since ld.so may use its
1386 link-time address. */
1387 if (h == htab->elf.hdynamic)
1390 /* def_regular is set by an assignment in a linker script in
1391 bfd_elf_record_link_assignment. start_stop is set on
1392 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1395 || h->root.type == bfd_link_hash_defined
1396 || h->root.type == bfd_link_hash_defweak)
1397 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
1404 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1405 "mov $foo, %reg2" with R_386_32. */
1407 modrm = 0xc0 | (modrm & 0x38) >> 3;
1408 bfd_put_8 (abfd, modrm, contents + roff - 1);
1413 /* Convert "mov foo@GOT(%reg1), %reg2" to
1414 "lea foo@GOTOFF(%reg1), %reg2". */
1415 r_type = R_386_GOTOFF;
1421 /* Only R_386_32 is supported. */
1427 /* Convert "test %reg1, foo@GOT(%reg2)" to
1428 "test $foo, %reg1". */
1429 modrm = 0xc0 | (modrm & 0x38) >> 3;
1434 /* Convert "binop foo@GOT(%reg1), %reg2" to
1435 "binop $foo, %reg2". */
1437 | (modrm & 0x38) >> 3
1441 bfd_put_8 (abfd, modrm, contents + roff - 1);
1445 bfd_put_8 (abfd, opcode, contents + roff - 2);
1446 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1455 /* Rename some of the generic section flags to better document how they
1457 #define need_convert_load sec_flg0
1458 #define check_relocs_failed sec_flg1
1460 /* Look through the relocs for a section during the first phase, and
1461 calculate needed space in the global offset table, procedure linkage
1462 table, and dynamic reloc sections. */
1465 elf_i386_check_relocs (bfd *abfd,
1466 struct bfd_link_info *info,
1468 const Elf_Internal_Rela *relocs)
1470 struct elf_x86_link_hash_table *htab;
1471 Elf_Internal_Shdr *symtab_hdr;
1472 struct elf_link_hash_entry **sym_hashes;
1473 const Elf_Internal_Rela *rel;
1474 const Elf_Internal_Rela *rel_end;
1478 if (bfd_link_relocatable (info))
1481 /* Don't do anything special with non-loaded, non-alloced sections.
1482 In particular, any relocs in such sections should not affect GOT
1483 and PLT reference counting (ie. we don't allow them to create GOT
1484 or PLT entries), there's no possibility or desire to optimize TLS
1485 relocs, and there's not much point in propagating relocs to shared
1486 libs that the dynamic linker won't relocate. */
1487 if ((sec->flags & SEC_ALLOC) == 0)
1490 BFD_ASSERT (is_i386_elf (abfd));
1492 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1495 sec->check_relocs_failed = 1;
1499 /* Get the section contents. */
1500 if (elf_section_data (sec)->this_hdr.contents != NULL)
1501 contents = elf_section_data (sec)->this_hdr.contents;
1502 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1504 sec->check_relocs_failed = 1;
1508 symtab_hdr = &elf_symtab_hdr (abfd);
1509 sym_hashes = elf_sym_hashes (abfd);
1513 rel_end = relocs + sec->reloc_count;
1514 for (rel = relocs; rel < rel_end; rel++)
1516 unsigned int r_type;
1517 unsigned int r_symndx;
1518 struct elf_link_hash_entry *h;
1519 struct elf_x86_link_hash_entry *eh;
1520 Elf_Internal_Sym *isym;
1522 bfd_boolean size_reloc;
1524 r_symndx = ELF32_R_SYM (rel->r_info);
1525 r_type = ELF32_R_TYPE (rel->r_info);
1527 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1529 /* xgettext:c-format */
1530 _bfd_error_handler (_("%B: bad symbol index: %d"),
1535 if (r_symndx < symtab_hdr->sh_info)
1537 /* A local symbol. */
1538 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1543 /* Check relocation against local STT_GNU_IFUNC symbol. */
1544 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1546 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
1550 /* Fake a STT_GNU_IFUNC symbol. */
1551 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1553 h->type = STT_GNU_IFUNC;
1556 h->forced_local = 1;
1557 h->root.type = bfd_link_hash_defined;
1565 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1566 while (h->root.type == bfd_link_hash_indirect
1567 || h->root.type == bfd_link_hash_warning)
1568 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1571 eh = (struct elf_x86_link_hash_entry *) h;
1574 if (r_type == R_386_GOTOFF)
1577 /* It is referenced by a non-shared object. */
1579 h->root.non_ir_ref_regular = 1;
1581 if (h->type == STT_GNU_IFUNC)
1582 elf_tdata (info->output_bfd)->has_gnu_symbols
1583 |= elf_gnu_symbol_ifunc;
1586 if (! elf_i386_tls_transition (info, abfd, sec, contents,
1587 symtab_hdr, sym_hashes,
1588 &r_type, GOT_UNKNOWN,
1589 rel, rel_end, h, r_symndx, FALSE))
1595 htab->tls_ld_or_ldm_got.refcount += 1;
1599 /* This symbol requires a procedure linkage table entry. We
1600 actually build the entry in adjust_dynamic_symbol,
1601 because this might be a case of linking PIC code which is
1602 never referenced by a dynamic object, in which case we
1603 don't need to generate a procedure linkage table entry
1606 /* If this is a local symbol, we resolve it directly without
1607 creating a procedure linkage table entry. */
1611 eh->has_got_reloc = 1;
1613 h->plt.refcount += 1;
1620 case R_386_TLS_IE_32:
1622 case R_386_TLS_GOTIE:
1623 if (!bfd_link_executable (info))
1624 info->flags |= DF_STATIC_TLS;
1630 case R_386_TLS_GOTDESC:
1631 case R_386_TLS_DESC_CALL:
1632 /* This symbol requires a global offset table entry. */
1634 int tls_type, old_tls_type;
1641 tls_type = GOT_NORMAL;
1643 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1644 case R_386_TLS_GOTDESC:
1645 case R_386_TLS_DESC_CALL:
1646 tls_type = GOT_TLS_GDESC; break;
1647 case R_386_TLS_IE_32:
1648 if (ELF32_R_TYPE (rel->r_info) == r_type)
1649 tls_type = GOT_TLS_IE_NEG;
1651 /* If this is a GD->IE transition, we may use either of
1652 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1653 tls_type = GOT_TLS_IE;
1656 case R_386_TLS_GOTIE:
1657 tls_type = GOT_TLS_IE_POS; break;
1662 h->got.refcount += 1;
1663 old_tls_type = elf_x86_hash_entry (h)->tls_type;
1667 bfd_signed_vma *local_got_refcounts;
1669 /* This is a global offset table entry for a local symbol. */
1670 local_got_refcounts = elf_local_got_refcounts (abfd);
1671 if (local_got_refcounts == NULL)
1675 size = symtab_hdr->sh_info;
1676 size *= (sizeof (bfd_signed_vma)
1677 + sizeof (bfd_vma) + sizeof(char));
1678 local_got_refcounts = (bfd_signed_vma *)
1679 bfd_zalloc (abfd, size);
1680 if (local_got_refcounts == NULL)
1682 elf_local_got_refcounts (abfd) = local_got_refcounts;
1683 elf_x86_local_tlsdesc_gotent (abfd)
1684 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1685 elf_x86_local_got_tls_type (abfd)
1686 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1688 local_got_refcounts[r_symndx] += 1;
1689 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
1692 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1693 tls_type |= old_tls_type;
1694 /* If a TLS symbol is accessed using IE at least once,
1695 there is no point to use dynamic model for it. */
1696 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1697 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1698 || (tls_type & GOT_TLS_IE) == 0))
1700 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1701 tls_type = old_tls_type;
1702 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1703 && GOT_TLS_GD_ANY_P (tls_type))
1704 tls_type |= old_tls_type;
1708 name = h->root.root.string;
1710 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1713 /* xgettext:c-format */
1714 (_("%B: `%s' accessed both as normal and "
1715 "thread local symbol"),
1717 bfd_set_error (bfd_error_bad_value);
1722 if (old_tls_type != tls_type)
1725 elf_x86_hash_entry (h)->tls_type = tls_type;
1727 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
1735 if (r_type != R_386_TLS_IE)
1738 eh->has_got_reloc = 1;
1743 case R_386_TLS_LE_32:
1746 eh->has_got_reloc = 1;
1747 if (bfd_link_executable (info))
1749 info->flags |= DF_STATIC_TLS;
1754 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1755 eh->has_non_got_reloc = 1;
1757 /* We are called after all symbols have been resolved. Only
1758 relocation against STT_GNU_IFUNC symbol must go through
1761 && (bfd_link_executable (info)
1762 || h->type == STT_GNU_IFUNC))
1764 /* If this reloc is in a read-only section, we might
1765 need a copy reloc. We can't check reliably at this
1766 stage whether the section is read-only, as input
1767 sections have not yet been mapped to output sections.
1768 Tentatively set the flag for now, and correct in
1769 adjust_dynamic_symbol. */
1772 /* We may need a .plt entry if the symbol is a function
1773 defined in a shared lib or is a STT_GNU_IFUNC function
1774 referenced from the code or read-only section. */
1776 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1777 h->plt.refcount += 1;
1779 if (r_type == R_386_PC32)
1781 /* Since something like ".long foo - ." may be used
1782 as pointer, make sure that PLT is used if foo is
1783 a function defined in a shared library. */
1784 if ((sec->flags & SEC_CODE) == 0)
1785 h->pointer_equality_needed = 1;
1786 else if (h->type == STT_GNU_IFUNC
1787 && bfd_link_pic (info))
1790 /* xgettext:c-format */
1791 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
1792 abfd, h->root.root.string);
1793 bfd_set_error (bfd_error_bad_value);
1799 h->pointer_equality_needed = 1;
1800 /* R_386_32 can be resolved at run-time. */
1801 if (r_type == R_386_32
1802 && (sec->flags & SEC_READONLY) == 0)
1803 eh->func_pointer_refcount += 1;
1809 /* If we are creating a shared library, and this is a reloc
1810 against a global symbol, or a non PC relative reloc
1811 against a local symbol, then we need to copy the reloc
1812 into the shared library. However, if we are linking with
1813 -Bsymbolic, we do not need to copy a reloc against a
1814 global symbol which is defined in an object we are
1815 including in the link (i.e., DEF_REGULAR is set). At
1816 this point we have not seen all the input files, so it is
1817 possible that DEF_REGULAR is not set now but will be set
1818 later (it is never cleared). In case of a weak definition,
1819 DEF_REGULAR may be cleared later by a strong definition in
1820 a shared library. We account for that possibility below by
1821 storing information in the relocs_copied field of the hash
1822 table entry. A similar situation occurs when creating
1823 shared libraries and symbol visibility changes render the
1826 If on the other hand, we are creating an executable, we
1827 may need to keep relocations for symbols satisfied by a
1828 dynamic library if we manage to avoid copy relocs for the
1831 Generate dynamic pointer relocation against STT_GNU_IFUNC
1832 symbol in the non-code section. */
1833 if ((bfd_link_pic (info)
1834 && (r_type != R_386_PC32
1836 && (! (bfd_link_pie (info)
1837 || SYMBOLIC_BIND (info, h))
1838 || h->root.type == bfd_link_hash_defweak
1839 || !h->def_regular))))
1841 && h->type == STT_GNU_IFUNC
1842 && r_type == R_386_32
1843 && (sec->flags & SEC_CODE) == 0)
1844 || (ELIMINATE_COPY_RELOCS
1845 && !bfd_link_pic (info)
1847 && (h->root.type == bfd_link_hash_defweak
1848 || !h->def_regular)))
1850 struct elf_dyn_relocs *p;
1851 struct elf_dyn_relocs **head;
1853 /* We must copy these reloc types into the output file.
1854 Create a reloc section in dynobj and make room for
1858 sreloc = _bfd_elf_make_dynamic_reloc_section
1859 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1865 /* If this is a global symbol, we count the number of
1866 relocations we need for this symbol. */
1869 head = &eh->dyn_relocs;
1873 /* Track dynamic relocs needed for local syms too.
1874 We really need local syms available to do this
1879 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1884 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1888 vpp = &elf_section_data (s)->local_dynrel;
1889 head = (struct elf_dyn_relocs **)vpp;
1893 if (p == NULL || p->sec != sec)
1895 bfd_size_type amt = sizeof *p;
1896 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1908 /* Count size relocation as PC-relative relocation. */
1909 if (r_type == R_386_PC32 || size_reloc)
1914 /* This relocation describes the C++ object vtable hierarchy.
1915 Reconstruct it for later use during GC. */
1916 case R_386_GNU_VTINHERIT:
1917 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1921 /* This relocation describes which C++ vtable entries are actually
1922 used. Record for later use during GC. */
1923 case R_386_GNU_VTENTRY:
1924 BFD_ASSERT (h != NULL);
1926 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1934 if (r_type == R_386_GOT32X
1935 && (h == NULL || h->type != STT_GNU_IFUNC))
1936 sec->need_convert_load = 1;
1939 if (elf_section_data (sec)->this_hdr.contents != contents)
1941 if (!info->keep_memory)
1945 /* Cache the section contents for elf_link_input_bfd. */
1946 elf_section_data (sec)->this_hdr.contents = contents;
1953 if (elf_section_data (sec)->this_hdr.contents != contents)
1955 sec->check_relocs_failed = 1;
1959 /* Allocate space in .plt, .got and associated reloc sections for
1963 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1965 struct bfd_link_info *info;
1966 struct elf_x86_link_hash_table *htab;
1967 struct elf_x86_link_hash_entry *eh;
1968 struct elf_dyn_relocs *p;
1969 unsigned plt_entry_size;
1970 bfd_boolean resolved_to_zero;
1972 if (h->root.type == bfd_link_hash_indirect)
1975 eh = (struct elf_x86_link_hash_entry *) h;
1977 info = (struct bfd_link_info *) inf;
1978 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1982 plt_entry_size = htab->plt.plt_entry_size;
1984 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
1989 /* Clear the reference count of function pointer relocations if
1990 symbol isn't a normal function. */
1991 if (h->type != STT_FUNC)
1992 eh->func_pointer_refcount = 0;
1994 /* We can't use the GOT PLT if pointer equality is needed since
1995 finish_dynamic_symbol won't clear symbol value and the dynamic
1996 linker won't update the GOT slot. We will get into an infinite
1997 loop at run-time. */
1998 if (htab->plt_got != NULL
1999 && h->type != STT_GNU_IFUNC
2000 && !h->pointer_equality_needed
2001 && h->plt.refcount > 0
2002 && h->got.refcount > 0)
2004 /* Don't use the regular PLT if there are both GOT and GOTPLT
2006 h->plt.offset = (bfd_vma) -1;
2008 /* Use the GOT PLT. */
2009 eh->plt_got.refcount = 1;
2012 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2013 here if it is defined and referenced in a non-shared object. */
2014 if (h->type == STT_GNU_IFUNC
2017 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2018 &htab->readonly_dynrelocs_against_ifunc,
2024 asection *s = htab->plt_second;
2025 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2027 /* Use the second PLT section if it is created. */
2028 eh->plt_second.offset = s->size;
2030 /* Make room for this entry in the second PLT section. */
2031 s->size += htab->non_lazy_plt->plt_entry_size;
2039 /* Don't create the PLT entry if there are only function pointer
2040 relocations which can be resolved at run-time. */
2041 else if (htab->elf.dynamic_sections_created
2042 && (h->plt.refcount > eh->func_pointer_refcount
2043 || eh->plt_got.refcount > 0))
2045 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
2047 /* Clear the reference count of function pointer relocations
2049 eh->func_pointer_refcount = 0;
2051 /* Make sure this symbol is output as a dynamic symbol.
2052 Undefined weak syms won't yet be marked as dynamic. */
2053 if (h->dynindx == -1
2055 && !resolved_to_zero
2056 && h->root.type == bfd_link_hash_undefweak)
2058 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2062 if (bfd_link_pic (info)
2063 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2065 asection *s = htab->elf.splt;
2066 asection *second_s = htab->plt_second;
2067 asection *got_s = htab->plt_got;
2069 /* If this is the first .plt entry, make room for the special
2070 first entry. The .plt section is used by prelink to undo
2071 prelinking for dynamic relocations. */
2073 s->size = htab->plt.has_plt0 * plt_entry_size;
2076 eh->plt_got.offset = got_s->size;
2079 h->plt.offset = s->size;
2081 eh->plt_second.offset = second_s->size;
2084 /* If this symbol is not defined in a regular file, and we are
2085 not generating a shared library, then set the symbol to this
2086 location in the .plt. This is required to make function
2087 pointers compare as equal between the normal executable and
2088 the shared library. */
2089 if (! bfd_link_pic (info)
2094 /* We need to make a call to the entry of the GOT PLT
2095 instead of regular PLT entry. */
2096 h->root.u.def.section = got_s;
2097 h->root.u.def.value = eh->plt_got.offset;
2103 /* We need to make a call to the entry of the
2104 second PLT instead of regular PLT entry. */
2105 h->root.u.def.section = second_s;
2106 h->root.u.def.value = eh->plt_second.offset;
2110 h->root.u.def.section = s;
2111 h->root.u.def.value = h->plt.offset;
2116 /* Make room for this entry. */
2118 got_s->size += htab->non_lazy_plt->plt_entry_size;
2121 s->size += plt_entry_size;
2123 second_s->size += htab->non_lazy_plt->plt_entry_size;
2125 /* We also need to make an entry in the .got.plt section,
2126 which will be placed in the .got section by the linker
2128 htab->elf.sgotplt->size += 4;
2130 /* There should be no PLT relocation against resolved
2131 undefined weak symbol in executable. */
2132 if (!resolved_to_zero)
2134 /* We also need to make an entry in the .rel.plt
2136 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2137 htab->elf.srelplt->reloc_count++;
2141 if (htab->is_vxworks && !bfd_link_pic (info))
2143 /* VxWorks has a second set of relocations for each PLT entry
2144 in executables. They go in a separate relocation section,
2145 which is processed by the kernel loader. */
2147 /* There are two relocations for the initial PLT entry: an
2148 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2149 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2151 asection *srelplt2 = htab->srelplt2;
2152 if (h->plt.offset == plt_entry_size)
2153 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2155 /* There are two extra relocations for each subsequent PLT entry:
2156 an R_386_32 relocation for the GOT entry, and an R_386_32
2157 relocation for the PLT entry. */
2159 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2164 eh->plt_got.offset = (bfd_vma) -1;
2165 h->plt.offset = (bfd_vma) -1;
2171 eh->plt_got.offset = (bfd_vma) -1;
2172 h->plt.offset = (bfd_vma) -1;
2176 eh->tlsdesc_got = (bfd_vma) -1;
2178 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2179 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2180 if (h->got.refcount > 0
2181 && bfd_link_executable (info)
2183 && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE))
2184 h->got.offset = (bfd_vma) -1;
2185 else if (h->got.refcount > 0)
2189 int tls_type = elf_x86_hash_entry (h)->tls_type;
2191 /* Make sure this symbol is output as a dynamic symbol.
2192 Undefined weak syms won't yet be marked as dynamic. */
2193 if (h->dynindx == -1
2195 && !resolved_to_zero
2196 && h->root.type == bfd_link_hash_undefweak)
2198 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2203 if (GOT_TLS_GDESC_P (tls_type))
2205 eh->tlsdesc_got = htab->elf.sgotplt->size
2206 - elf_x86_compute_jump_table_size (htab);
2207 htab->elf.sgotplt->size += 8;
2208 h->got.offset = (bfd_vma) -2;
2210 if (! GOT_TLS_GDESC_P (tls_type)
2211 || GOT_TLS_GD_P (tls_type))
2213 h->got.offset = s->size;
2215 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2216 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2219 dyn = htab->elf.dynamic_sections_created;
2220 /* R_386_TLS_IE_32 needs one dynamic relocation,
2221 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2222 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2223 need two), R_386_TLS_GD needs one if local symbol and two if
2224 global. No dynamic relocation against resolved undefined weak
2225 symbol in executable. */
2226 if (tls_type == GOT_TLS_IE_BOTH)
2227 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2228 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2229 || (tls_type & GOT_TLS_IE))
2230 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2231 else if (GOT_TLS_GD_P (tls_type))
2232 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2233 else if (! GOT_TLS_GDESC_P (tls_type)
2234 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2235 && !resolved_to_zero)
2236 || h->root.type != bfd_link_hash_undefweak)
2237 && (bfd_link_pic (info)
2238 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2239 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2240 if (GOT_TLS_GDESC_P (tls_type))
2241 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2244 h->got.offset = (bfd_vma) -1;
2246 if (eh->dyn_relocs == NULL)
2249 /* In the shared -Bsymbolic case, discard space allocated for
2250 dynamic pc-relative relocs against symbols which turn out to be
2251 defined in regular objects. For the normal shared case, discard
2252 space for pc-relative relocs that have become local due to symbol
2253 visibility changes. */
2255 if (bfd_link_pic (info))
2257 /* The only reloc that uses pc_count is R_386_PC32, which will
2258 appear on a call or on something like ".long foo - .". We
2259 want calls to protected symbols to resolve directly to the
2260 function rather than going via the plt. If people want
2261 function pointer comparisons to work as expected then they
2262 should avoid writing assembly like ".long foo - .". */
2263 if (SYMBOL_CALLS_LOCAL (info, h))
2265 struct elf_dyn_relocs **pp;
2267 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2269 p->count -= p->pc_count;
2278 if (htab->is_vxworks)
2280 struct elf_dyn_relocs **pp;
2281 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2283 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2290 /* Also discard relocs on undefined weak syms with non-default
2291 visibility or in PIE. */
2292 if (eh->dyn_relocs != NULL
2293 && h->root.type == bfd_link_hash_undefweak)
2295 /* Undefined weak symbol is never bound locally in shared
2297 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2298 || resolved_to_zero)
2302 /* Keep dynamic non-GOT/non-PLT relocation so that we
2303 can branch to 0 without PLT. */
2304 struct elf_dyn_relocs **pp;
2306 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2307 if (p->pc_count == 0)
2311 /* Remove non-R_386_PC32 relocation. */
2312 p->count = p->pc_count;
2316 if (eh->dyn_relocs != NULL)
2318 /* Make sure undefined weak symbols are output
2319 as dynamic symbols in PIEs for dynamic non-GOT
2320 non-PLT reloations. */
2321 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2326 eh->dyn_relocs = NULL;
2328 else if (h->dynindx == -1
2329 && !h->forced_local)
2331 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2336 else if (ELIMINATE_COPY_RELOCS)
2338 /* For the non-shared case, discard space for relocs against
2339 symbols which turn out to need copy relocs or are not
2340 dynamic. Keep dynamic relocations for run-time function
2341 pointer initialization. */
2343 if ((!h->non_got_ref
2344 || eh->func_pointer_refcount > 0
2345 || (h->root.type == bfd_link_hash_undefweak
2346 && !resolved_to_zero))
2349 || (htab->elf.dynamic_sections_created
2350 && (h->root.type == bfd_link_hash_undefweak
2351 || h->root.type == bfd_link_hash_undefined))))
2353 /* Make sure this symbol is output as a dynamic symbol.
2354 Undefined weak syms won't yet be marked as dynamic. */
2355 if (h->dynindx == -1
2357 && !resolved_to_zero
2358 && h->root.type == bfd_link_hash_undefweak)
2360 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2364 /* If that succeeded, we know we'll be keeping all the
2366 if (h->dynindx != -1)
2370 eh->dyn_relocs = NULL;
2371 eh->func_pointer_refcount = 0;
2376 /* Finally, allocate space. */
2377 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2381 sreloc = elf_section_data (p->sec)->sreloc;
2383 BFD_ASSERT (sreloc != NULL);
2384 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2390 /* Allocate space in .plt, .got and associated reloc sections for
2391 local dynamic relocs. */
2394 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2396 struct elf_link_hash_entry *h
2397 = (struct elf_link_hash_entry *) *slot;
2399 if (h->type != STT_GNU_IFUNC
2403 || h->root.type != bfd_link_hash_defined)
2406 return elf_i386_allocate_dynrelocs (h, inf);
2409 /* Convert load via the GOT slot to load immediate. */
2412 elf_i386_convert_load (bfd *abfd, asection *sec,
2413 struct bfd_link_info *link_info)
2415 struct elf_x86_link_hash_table *htab;
2416 Elf_Internal_Shdr *symtab_hdr;
2417 Elf_Internal_Rela *internal_relocs;
2418 Elf_Internal_Rela *irel, *irelend;
2420 bfd_boolean changed;
2421 bfd_signed_vma *local_got_refcounts;
2423 /* Don't even try to convert non-ELF outputs. */
2424 if (!is_elf_hash_table (link_info->hash))
2427 /* Nothing to do if there is no need or no output. */
2428 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2429 || sec->need_convert_load == 0
2430 || bfd_is_abs_section (sec->output_section))
2433 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2435 /* Load the relocations for this section. */
2436 internal_relocs = (_bfd_elf_link_read_relocs
2437 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2438 link_info->keep_memory));
2439 if (internal_relocs == NULL)
2443 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
2444 local_got_refcounts = elf_local_got_refcounts (abfd);
2446 /* Get the section contents. */
2447 if (elf_section_data (sec)->this_hdr.contents != NULL)
2448 contents = elf_section_data (sec)->this_hdr.contents;
2451 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2455 irelend = internal_relocs + sec->reloc_count;
2456 for (irel = internal_relocs; irel < irelend; irel++)
2458 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2459 unsigned int r_symndx;
2460 struct elf_link_hash_entry *h;
2461 bfd_boolean converted;
2463 /* Don't convert R_386_GOT32 since we can't tell if it is applied
2464 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
2465 if (r_type != R_386_GOT32X)
2468 r_symndx = ELF32_R_SYM (irel->r_info);
2469 if (r_symndx < symtab_hdr->sh_info)
2470 h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
2471 (const Elf_Internal_Rela *) irel,
2475 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
2476 while (h->root.type == bfd_link_hash_indirect
2477 || h->root.type == bfd_link_hash_warning)
2478 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2481 /* STT_GNU_IFUNC must keep GOT32 relocations. */
2482 if (h != NULL && h->type == STT_GNU_IFUNC)
2486 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
2487 irel, h, &converted, link_info))
2492 changed = converted;
2495 if (h->got.refcount > 0)
2496 h->got.refcount -= 1;
2500 if (local_got_refcounts != NULL
2501 && local_got_refcounts[r_symndx] > 0)
2502 local_got_refcounts[r_symndx] -= 1;
2507 if (contents != NULL
2508 && elf_section_data (sec)->this_hdr.contents != contents)
2510 if (!changed && !link_info->keep_memory)
2514 /* Cache the section contents for elf_link_input_bfd. */
2515 elf_section_data (sec)->this_hdr.contents = contents;
2519 if (elf_section_data (sec)->relocs != internal_relocs)
2522 free (internal_relocs);
2524 elf_section_data (sec)->relocs = internal_relocs;
2530 if (contents != NULL
2531 && elf_section_data (sec)->this_hdr.contents != contents)
2533 if (internal_relocs != NULL
2534 && elf_section_data (sec)->relocs != internal_relocs)
2535 free (internal_relocs);
2539 /* Set the sizes of the dynamic sections. */
2542 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2544 struct elf_x86_link_hash_table *htab;
2550 htab = elf_x86_hash_table (info, I386_ELF_DATA);
2553 dynobj = htab->elf.dynobj;
2557 /* Set up .got offsets for local syms, and space for local dynamic
2559 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2561 bfd_signed_vma *local_got;
2562 bfd_signed_vma *end_local_got;
2563 char *local_tls_type;
2564 bfd_vma *local_tlsdesc_gotent;
2565 bfd_size_type locsymcount;
2566 Elf_Internal_Shdr *symtab_hdr;
2569 if (! is_i386_elf (ibfd))
2572 for (s = ibfd->sections; s != NULL; s = s->next)
2574 struct elf_dyn_relocs *p;
2576 if (!elf_i386_convert_load (ibfd, s, info))
2579 for (p = ((struct elf_dyn_relocs *)
2580 elf_section_data (s)->local_dynrel);
2584 if (!bfd_is_abs_section (p->sec)
2585 && bfd_is_abs_section (p->sec->output_section))
2587 /* Input section has been discarded, either because
2588 it is a copy of a linkonce section or due to
2589 linker script /DISCARD/, so we'll be discarding
2592 else if (htab->is_vxworks
2593 && strcmp (p->sec->output_section->name,
2596 /* Relocations in vxworks .tls_vars sections are
2597 handled specially by the loader. */
2599 else if (p->count != 0)
2601 srel = elf_section_data (p->sec)->sreloc;
2602 srel->size += p->count * sizeof (Elf32_External_Rel);
2603 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2604 && (info->flags & DF_TEXTREL) == 0)
2606 info->flags |= DF_TEXTREL;
2607 if ((info->warn_shared_textrel && bfd_link_pic (info))
2608 || info->error_textrel)
2609 /* xgettext:c-format */
2610 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2611 p->sec->owner, p->sec);
2617 local_got = elf_local_got_refcounts (ibfd);
2621 symtab_hdr = &elf_symtab_hdr (ibfd);
2622 locsymcount = symtab_hdr->sh_info;
2623 end_local_got = local_got + locsymcount;
2624 local_tls_type = elf_x86_local_got_tls_type (ibfd);
2625 local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd);
2627 srel = htab->elf.srelgot;
2628 for (; local_got < end_local_got;
2629 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2631 *local_tlsdesc_gotent = (bfd_vma) -1;
2634 if (GOT_TLS_GDESC_P (*local_tls_type))
2636 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2637 - elf_x86_compute_jump_table_size (htab);
2638 htab->elf.sgotplt->size += 8;
2639 *local_got = (bfd_vma) -2;
2641 if (! GOT_TLS_GDESC_P (*local_tls_type)
2642 || GOT_TLS_GD_P (*local_tls_type))
2644 *local_got = s->size;
2646 if (GOT_TLS_GD_P (*local_tls_type)
2647 || *local_tls_type == GOT_TLS_IE_BOTH)
2650 if (bfd_link_pic (info)
2651 || GOT_TLS_GD_ANY_P (*local_tls_type)
2652 || (*local_tls_type & GOT_TLS_IE))
2654 if (*local_tls_type == GOT_TLS_IE_BOTH)
2655 srel->size += 2 * sizeof (Elf32_External_Rel);
2656 else if (GOT_TLS_GD_P (*local_tls_type)
2657 || ! GOT_TLS_GDESC_P (*local_tls_type))
2658 srel->size += sizeof (Elf32_External_Rel);
2659 if (GOT_TLS_GDESC_P (*local_tls_type))
2660 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2664 *local_got = (bfd_vma) -1;
2668 if (htab->tls_ld_or_ldm_got.refcount > 0)
2670 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2672 htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size;
2673 htab->elf.sgot->size += 8;
2674 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2677 htab->tls_ld_or_ldm_got.offset = -1;
2679 /* Allocate global sym .plt and .got entries, and space for global
2680 sym dynamic relocs. */
2681 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2683 /* Allocate .plt and .got entries, and space for local symbols. */
2684 htab_traverse (htab->loc_hash_table,
2685 elf_i386_allocate_local_dynrelocs,
2688 /* For every jump slot reserved in the sgotplt, reloc_count is
2689 incremented. However, when we reserve space for TLS descriptors,
2690 it's not incremented, so in order to compute the space reserved
2691 for them, it suffices to multiply the reloc count by the jump
2694 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2695 so that R_386_IRELATIVE entries come last. */
2696 if (htab->elf.srelplt)
2698 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2699 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2700 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2702 else if (htab->elf.irelplt)
2703 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2706 if (htab->elf.sgotplt)
2708 /* Don't allocate .got.plt section if there are no GOT nor PLT
2709 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2710 if ((htab->elf.hgot == NULL
2711 || !htab->elf.hgot->ref_regular_nonweak)
2712 && (htab->elf.sgotplt->size
2713 == get_elf_backend_data (output_bfd)->got_header_size)
2714 && (htab->elf.splt == NULL
2715 || htab->elf.splt->size == 0)
2716 && (htab->elf.sgot == NULL
2717 || htab->elf.sgot->size == 0)
2718 && (htab->elf.iplt == NULL
2719 || htab->elf.iplt->size == 0)
2720 && (htab->elf.igotplt == NULL
2721 || htab->elf.igotplt->size == 0))
2722 htab->elf.sgotplt->size = 0;
2725 if (_bfd_elf_eh_frame_present (info))
2727 if (htab->plt_eh_frame != NULL
2728 && htab->elf.splt != NULL
2729 && htab->elf.splt->size != 0
2730 && !bfd_is_abs_section (htab->elf.splt->output_section))
2731 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
2733 if (htab->plt_got_eh_frame != NULL
2734 && htab->plt_got != NULL
2735 && htab->plt_got->size != 0
2736 && !bfd_is_abs_section (htab->plt_got->output_section))
2737 htab->plt_got_eh_frame->size
2738 = htab->non_lazy_plt->eh_frame_plt_size;
2740 /* Unwind info for the second PLT and .plt.got sections are
2742 if (htab->plt_second_eh_frame != NULL
2743 && htab->plt_second != NULL
2744 && htab->plt_second->size != 0
2745 && !bfd_is_abs_section (htab->plt_second->output_section))
2746 htab->plt_second_eh_frame->size
2747 = htab->non_lazy_plt->eh_frame_plt_size;
2750 /* We now have determined the sizes of the various dynamic sections.
2751 Allocate memory for them. */
2753 for (s = dynobj->sections; s != NULL; s = s->next)
2755 bfd_boolean strip_section = TRUE;
2757 if ((s->flags & SEC_LINKER_CREATED) == 0)
2760 if (s == htab->elf.splt
2761 || s == htab->elf.sgot)
2763 /* Strip this section if we don't need it; see the
2765 /* We'd like to strip these sections if they aren't needed, but if
2766 we've exported dynamic symbols from them we must leave them.
2767 It's too late to tell BFD to get rid of the symbols. */
2769 if (htab->elf.hplt != NULL)
2770 strip_section = FALSE;
2772 else if (s == htab->elf.sgotplt
2773 || s == htab->elf.iplt
2774 || s == htab->elf.igotplt
2775 || s == htab->plt_second
2776 || s == htab->plt_got
2777 || s == htab->plt_eh_frame
2778 || s == htab->plt_got_eh_frame
2779 || s == htab->plt_second_eh_frame
2780 || s == htab->elf.sdynbss
2781 || s == htab->elf.sdynrelro)
2783 /* Strip these too. */
2785 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2788 && s != htab->elf.srelplt
2789 && s != htab->srelplt2)
2792 /* We use the reloc_count field as a counter if we need
2793 to copy relocs into the output file. */
2798 /* It's not one of our sections, so don't allocate space. */
2804 /* If we don't need this section, strip it from the
2805 output file. This is mostly to handle .rel.bss and
2806 .rel.plt. We must create both sections in
2807 create_dynamic_sections, because they must be created
2808 before the linker maps input sections to output
2809 sections. The linker does that before
2810 adjust_dynamic_symbol is called, and it is that
2811 function which decides whether anything needs to go
2812 into these sections. */
2814 s->flags |= SEC_EXCLUDE;
2818 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2821 /* Allocate memory for the section contents. We use bfd_zalloc
2822 here in case unused entries are not reclaimed before the
2823 section's contents are written out. This should not happen,
2824 but this way if it does, we get a R_386_NONE reloc instead
2826 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2827 if (s->contents == NULL)
2831 if (htab->plt_eh_frame != NULL
2832 && htab->plt_eh_frame->contents != NULL)
2834 memcpy (htab->plt_eh_frame->contents,
2835 htab->plt.eh_frame_plt,
2836 htab->plt_eh_frame->size);
2837 bfd_put_32 (dynobj, htab->elf.splt->size,
2838 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2841 if (htab->plt_got_eh_frame != NULL
2842 && htab->plt_got_eh_frame->contents != NULL)
2844 memcpy (htab->plt_got_eh_frame->contents,
2845 htab->non_lazy_plt->eh_frame_plt,
2846 htab->plt_got_eh_frame->size);
2847 bfd_put_32 (dynobj, htab->plt_got->size,
2848 (htab->plt_got_eh_frame->contents
2849 + PLT_FDE_LEN_OFFSET));
2852 if (htab->plt_second_eh_frame != NULL
2853 && htab->plt_second_eh_frame->contents != NULL)
2855 memcpy (htab->plt_second_eh_frame->contents,
2856 htab->non_lazy_plt->eh_frame_plt,
2857 htab->plt_second_eh_frame->size);
2858 bfd_put_32 (dynobj, htab->plt_second->size,
2859 (htab->plt_second_eh_frame->contents
2860 + PLT_FDE_LEN_OFFSET));
2863 if (htab->elf.dynamic_sections_created)
2865 /* Add some entries to the .dynamic section. We fill in the
2866 values later, in elf_i386_finish_dynamic_sections, but we
2867 must add the entries now so that we get the correct size for
2868 the .dynamic section. The DT_DEBUG entry is filled in by the
2869 dynamic linker and used by the debugger. */
2870 #define add_dynamic_entry(TAG, VAL) \
2871 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2873 if (bfd_link_executable (info))
2875 if (!add_dynamic_entry (DT_DEBUG, 0))
2879 if (htab->elf.splt->size != 0)
2881 /* DT_PLTGOT is used by prelink even if there is no PLT
2883 if (!add_dynamic_entry (DT_PLTGOT, 0))
2887 if (htab->elf.srelplt->size != 0)
2889 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2890 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2891 || !add_dynamic_entry (DT_JMPREL, 0))
2897 if (!add_dynamic_entry (DT_REL, 0)
2898 || !add_dynamic_entry (DT_RELSZ, 0)
2899 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2902 /* If any dynamic relocs apply to a read-only section,
2903 then we need a DT_TEXTREL entry. */
2904 if ((info->flags & DF_TEXTREL) == 0)
2905 elf_link_hash_traverse (&htab->elf,
2906 _bfd_x86_elf_readonly_dynrelocs,
2909 if ((info->flags & DF_TEXTREL) != 0)
2911 if (htab->readonly_dynrelocs_against_ifunc)
2913 info->callbacks->einfo
2914 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
2915 bfd_set_error (bfd_error_bad_value);
2919 if (!add_dynamic_entry (DT_TEXTREL, 0))
2923 if (htab->is_vxworks
2924 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2927 #undef add_dynamic_entry
2932 /* Set the correct type for an x86 ELF section. We do this by the
2933 section name, which is a hack, but ought to work. */
2936 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2937 Elf_Internal_Shdr *hdr,
2942 name = bfd_get_section_name (abfd, sec);
2944 /* This is an ugly, but unfortunately necessary hack that is
2945 needed when producing EFI binaries on x86. It tells
2946 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2947 containing ELF relocation info. We need this hack in order to
2948 be able to generate ELF binaries that can be translated into
2949 EFI applications (which are essentially COFF objects). Those
2950 files contain a COFF ".reloc" section inside an ELFNN object,
2951 which would normally cause BFD to segfault because it would
2952 attempt to interpret this section as containing relocation
2953 entries for section "oc". With this hack enabled, ".reloc"
2954 will be treated as a normal data section, which will avoid the
2955 segfault. However, you won't be able to create an ELFNN binary
2956 with a section named "oc" that needs relocations, but that's
2957 the kind of ugly side-effects you get when detecting section
2958 types based on their names... In practice, this limitation is
2959 unlikely to bite. */
2960 if (strcmp (name, ".reloc") == 0)
2961 hdr->sh_type = SHT_PROGBITS;
2966 /* Return the relocation value for @tpoff relocation
2967 if STT_TLS virtual address is ADDRESS. */
2970 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2972 struct elf_link_hash_table *htab = elf_hash_table (info);
2973 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2974 bfd_vma static_tls_size;
2976 /* If tls_sec is NULL, we should have signalled an error already. */
2977 if (htab->tls_sec == NULL)
2980 /* Consider special static TLS alignment requirements. */
2981 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2982 return static_tls_size + htab->tls_sec->vma - address;
2985 /* Relocate an i386 ELF section. */
2988 elf_i386_relocate_section (bfd *output_bfd,
2989 struct bfd_link_info *info,
2991 asection *input_section,
2993 Elf_Internal_Rela *relocs,
2994 Elf_Internal_Sym *local_syms,
2995 asection **local_sections)
2997 struct elf_x86_link_hash_table *htab;
2998 Elf_Internal_Shdr *symtab_hdr;
2999 struct elf_link_hash_entry **sym_hashes;
3000 bfd_vma *local_got_offsets;
3001 bfd_vma *local_tlsdesc_gotents;
3002 Elf_Internal_Rela *rel;
3003 Elf_Internal_Rela *wrel;
3004 Elf_Internal_Rela *relend;
3005 bfd_boolean is_vxworks_tls;
3006 unsigned plt_entry_size;
3008 BFD_ASSERT (is_i386_elf (input_bfd));
3010 /* Skip if check_relocs failed. */
3011 if (input_section->check_relocs_failed)
3014 htab = elf_x86_hash_table (info, I386_ELF_DATA);
3017 symtab_hdr = &elf_symtab_hdr (input_bfd);
3018 sym_hashes = elf_sym_hashes (input_bfd);
3019 local_got_offsets = elf_local_got_offsets (input_bfd);
3020 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3021 /* We have to handle relocations in vxworks .tls_vars sections
3022 specially, because the dynamic loader is 'weird'. */
3023 is_vxworks_tls = (htab->is_vxworks
3024 && bfd_link_pic (info)
3025 && !strcmp (input_section->output_section->name,
3028 _bfd_x86_elf_set_tls_module_base (info);
3030 plt_entry_size = htab->plt.plt_entry_size;
3032 rel = wrel = relocs;
3033 relend = relocs + input_section->reloc_count;
3034 for (; rel < relend; wrel++, rel++)
3036 unsigned int r_type;
3037 reloc_howto_type *howto;
3038 unsigned long r_symndx;
3039 struct elf_link_hash_entry *h;
3040 struct elf_x86_link_hash_entry *eh;
3041 Elf_Internal_Sym *sym;
3043 bfd_vma off, offplt, plt_offset;
3045 bfd_boolean unresolved_reloc;
3046 bfd_reloc_status_type r;
3050 asection *resolved_plt;
3051 bfd_boolean resolved_to_zero;
3052 bfd_boolean relative_reloc;
3054 r_type = ELF32_R_TYPE (rel->r_info);
3055 if (r_type == R_386_GNU_VTINHERIT
3056 || r_type == R_386_GNU_VTENTRY)
3063 if ((indx = r_type) >= R_386_standard
3064 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3065 >= R_386_ext - R_386_standard)
3066 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3067 >= R_386_ext2 - R_386_ext))
3068 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
3070 howto = elf_howto_table + indx;
3072 r_symndx = ELF32_R_SYM (rel->r_info);
3076 unresolved_reloc = FALSE;
3077 if (r_symndx < symtab_hdr->sh_info)
3079 sym = local_syms + r_symndx;
3080 sec = local_sections[r_symndx];
3081 relocation = (sec->output_section->vma
3082 + sec->output_offset
3084 st_size = sym->st_size;
3086 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3087 && ((sec->flags & SEC_MERGE) != 0
3088 || (bfd_link_relocatable (info)
3089 && sec->output_offset != 0)))
3092 bfd_byte *where = contents + rel->r_offset;
3094 switch (howto->size)
3097 addend = bfd_get_8 (input_bfd, where);
3098 if (howto->pc_relative)
3100 addend = (addend ^ 0x80) - 0x80;
3105 addend = bfd_get_16 (input_bfd, where);
3106 if (howto->pc_relative)
3108 addend = (addend ^ 0x8000) - 0x8000;
3113 addend = bfd_get_32 (input_bfd, where);
3114 if (howto->pc_relative)
3116 addend = (addend ^ 0x80000000) - 0x80000000;
3124 if (bfd_link_relocatable (info))
3125 addend += sec->output_offset;
3128 asection *msec = sec;
3129 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3131 addend -= relocation;
3132 addend += msec->output_section->vma + msec->output_offset;
3135 switch (howto->size)
3138 /* FIXME: overflow checks. */
3139 if (howto->pc_relative)
3141 bfd_put_8 (input_bfd, addend, where);
3144 if (howto->pc_relative)
3146 bfd_put_16 (input_bfd, addend, where);
3149 if (howto->pc_relative)
3151 bfd_put_32 (input_bfd, addend, where);
3155 else if (!bfd_link_relocatable (info)
3156 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3158 /* Relocate against local STT_GNU_IFUNC symbol. */
3159 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
3164 /* Set STT_GNU_IFUNC symbol value. */
3165 h->root.u.def.value = sym->st_value;
3166 h->root.u.def.section = sec;
3171 bfd_boolean warned ATTRIBUTE_UNUSED;
3172 bfd_boolean ignored ATTRIBUTE_UNUSED;
3174 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3175 r_symndx, symtab_hdr, sym_hashes,
3177 unresolved_reloc, warned, ignored);
3181 if (sec != NULL && discarded_section (sec))
3183 _bfd_clear_contents (howto, input_bfd, input_section,
3184 contents + rel->r_offset);
3185 wrel->r_offset = rel->r_offset;
3189 /* For ld -r, remove relocations in debug sections against
3190 sections defined in discarded sections. Not done for
3191 eh_frame editing code expects to be present. */
3192 if (bfd_link_relocatable (info)
3193 && (input_section->flags & SEC_DEBUGGING))
3199 if (bfd_link_relocatable (info))
3206 eh = (struct elf_x86_link_hash_entry *) h;
3208 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3209 it here if it is defined in a non-shared object. */
3211 && h->type == STT_GNU_IFUNC
3214 asection *gotplt, *base_got;
3218 if ((input_section->flags & SEC_ALLOC) == 0)
3220 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3221 sections because such sections are not SEC_ALLOC and
3222 thus ld.so will not process them. */
3223 if ((input_section->flags & SEC_DEBUGGING) != 0)
3228 /* STT_GNU_IFUNC symbol must go through PLT. */
3229 if (htab->elf.splt != NULL)
3231 if (htab->plt_second != NULL)
3233 resolved_plt = htab->plt_second;
3234 plt_offset = eh->plt_second.offset;
3238 resolved_plt = htab->elf.splt;
3239 plt_offset = h->plt.offset;
3241 gotplt = htab->elf.sgotplt;
3245 resolved_plt = htab->elf.iplt;
3246 plt_offset = h->plt.offset;
3247 gotplt = htab->elf.igotplt;
3257 base_got = htab->elf.sgot;
3258 off = h->got.offset;
3260 if (base_got == NULL)
3263 if (off == (bfd_vma) -1)
3265 /* We can't use h->got.offset here to save state, or
3266 even just remember the offset, as finish_dynamic_symbol
3267 would use that as offset into .got. */
3269 if (h->plt.offset == (bfd_vma) -1)
3272 if (htab->elf.splt != NULL)
3274 plt_index = (h->plt.offset / plt_entry_size
3275 - htab->plt.has_plt0);
3276 off = (plt_index + 3) * 4;
3277 base_got = htab->elf.sgotplt;
3281 plt_index = h->plt.offset / plt_entry_size;
3282 off = plt_index * 4;
3283 base_got = htab->elf.igotplt;
3286 if (h->dynindx == -1
3290 /* This references the local defitionion. We must
3291 initialize this entry in the global offset table.
3292 Since the offset must always be a multiple of 8,
3293 we use the least significant bit to record
3294 whether we have initialized it already.
3296 When doing a dynamic link, we create a .rela.got
3297 relocation entry to initialize the value. This
3298 is done in the finish_dynamic_symbol routine. */
3303 bfd_put_32 (output_bfd, relocation,
3304 base_got->contents + off);
3312 relocation = (base_got->output_section->vma
3313 + base_got->output_offset + off
3314 - gotplt->output_section->vma
3315 - gotplt->output_offset);
3317 if (rel->r_offset > 1
3318 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3319 && *(contents + rel->r_offset - 2) != 0x8d)
3321 if (bfd_link_pic (info))
3322 goto disallow_got32;
3324 /* Add the GOT base if there is no base register. */
3325 relocation += (gotplt->output_section->vma
3326 + gotplt->output_offset);
3328 else if (htab->elf.splt == NULL)
3330 /* Adjust for static executables. */
3331 relocation += gotplt->output_offset;
3337 if (h->plt.offset == (bfd_vma) -1)
3339 /* Handle static pointers of STT_GNU_IFUNC symbols. */
3340 if (r_type == R_386_32
3341 && (input_section->flags & SEC_CODE) == 0)
3342 goto do_ifunc_pointer;
3343 goto bad_ifunc_reloc;
3346 relocation = (resolved_plt->output_section->vma
3347 + resolved_plt->output_offset + plt_offset);
3353 if (h->root.root.string)
3354 name = h->root.root.string;
3356 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3359 /* xgettext:c-format */
3360 (_("%B: relocation %s against STT_GNU_IFUNC "
3361 "symbol `%s' isn't supported"), input_bfd,
3363 bfd_set_error (bfd_error_bad_value);
3367 /* Generate dynamic relcoation only when there is a
3368 non-GOT reference in a shared object. */
3369 if ((bfd_link_pic (info) && h->non_got_ref)
3370 || h->plt.offset == (bfd_vma) -1)
3372 Elf_Internal_Rela outrel;
3377 /* Need a dynamic relocation to get the real function
3379 offset = _bfd_elf_section_offset (output_bfd,
3383 if (offset == (bfd_vma) -1
3384 || offset == (bfd_vma) -2)
3387 outrel.r_offset = (input_section->output_section->vma
3388 + input_section->output_offset
3391 if (h->dynindx == -1
3393 || bfd_link_executable (info))
3395 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
3396 h->root.root.string,
3397 h->root.u.def.section->owner);
3399 /* This symbol is resolved locally. */
3400 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3401 bfd_put_32 (output_bfd,
3402 (h->root.u.def.value
3403 + h->root.u.def.section->output_section->vma
3404 + h->root.u.def.section->output_offset),
3408 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3410 /* Dynamic relocations are stored in
3411 1. .rel.ifunc section in PIC object.
3412 2. .rel.got section in dynamic executable.
3413 3. .rel.iplt section in static executable. */
3414 if (bfd_link_pic (info))
3415 sreloc = htab->elf.irelifunc;
3416 else if (htab->elf.splt != NULL)
3417 sreloc = htab->elf.srelgot;
3419 sreloc = htab->elf.irelplt;
3420 elf_append_rel (output_bfd, sreloc, &outrel);
3422 /* If this reloc is against an external symbol, we
3423 do not want to fiddle with the addend. Otherwise,
3424 we need to include the symbol value so that it
3425 becomes an addend for the dynamic reloc. For an
3426 internal symbol, we have updated addend. */
3435 relocation -= (gotplt->output_section->vma
3436 + gotplt->output_offset);
3441 resolved_to_zero = (eh != NULL
3442 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
3450 /* Avoid optimizing _DYNAMIC since ld.so may use its
3451 link-time address. */
3452 if (h == htab->elf.hdynamic)
3455 if (bfd_link_pic (info))
3457 /* It is OK to convert mov to lea and convert indirect
3458 branch to direct branch. It is OK to convert adc,
3459 add, and, cmp, or, sbb, sub, test, xor only when PIC
3461 unsigned int opcode, addend;
3462 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
3465 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3466 if (opcode != 0x8b && opcode != 0xff)
3470 /* Resolve "mov GOT[(%reg)], %reg",
3471 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
3472 and "binop foo@GOT[(%reg)], %reg". */
3474 || (h->plt.offset == (bfd_vma) -1
3475 && h->got.offset == (bfd_vma) -1)
3476 || htab->elf.sgotplt == NULL)
3479 offplt = (htab->elf.sgotplt->output_section->vma
3480 + htab->elf.sgotplt->output_offset);
3482 /* It is relative to .got.plt section. */
3483 if (h->got.offset != (bfd_vma) -1)
3484 /* Use GOT entry. Mask off the least significant bit in
3485 GOT offset which may be set by R_386_GOT32 processing
3487 relocation = (htab->elf.sgot->output_section->vma
3488 + htab->elf.sgot->output_offset
3489 + (h->got.offset & ~1) - offplt);
3491 /* Use GOTPLT entry. */
3492 relocation = (h->plt.offset / plt_entry_size
3493 - htab->plt.has_plt0 + 3) * 4;
3495 if (!bfd_link_pic (info))
3497 /* If not PIC, add the .got.plt section address for
3498 baseless addressing. */
3500 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3501 if ((modrm & 0xc7) == 0x5)
3502 relocation += offplt;
3505 unresolved_reloc = FALSE;
3510 /* Relocation is to the entry for this symbol in the global
3512 if (htab->elf.sgot == NULL)
3515 relative_reloc = FALSE;
3520 off = h->got.offset;
3521 dyn = htab->elf.dynamic_sections_created;
3522 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3523 bfd_link_pic (info),
3525 || (bfd_link_pic (info)
3526 && SYMBOL_REFERENCES_LOCAL (info, h))
3527 || (ELF_ST_VISIBILITY (h->other)
3528 && h->root.type == bfd_link_hash_undefweak))
3530 /* This is actually a static link, or it is a
3531 -Bsymbolic link and the symbol is defined
3532 locally, or the symbol was forced to be local
3533 because of a version file. We must initialize
3534 this entry in the global offset table. Since the
3535 offset must always be a multiple of 4, we use the
3536 least significant bit to record whether we have
3537 initialized it already.
3539 When doing a dynamic link, we create a .rel.got
3540 relocation entry to initialize the value. This
3541 is done in the finish_dynamic_symbol routine. */
3546 bfd_put_32 (output_bfd, relocation,
3547 htab->elf.sgot->contents + off);
3550 if (h->dynindx == -1
3552 && h->root.type != bfd_link_hash_undefweak
3553 && bfd_link_pic (info))
3555 /* PR ld/21402: If this symbol isn't dynamic
3556 in PIC, generate R_386_RELATIVE here. */
3557 eh->no_finish_dynamic_symbol = 1;
3558 relative_reloc = TRUE;
3563 unresolved_reloc = FALSE;
3567 if (local_got_offsets == NULL)
3570 off = local_got_offsets[r_symndx];
3572 /* The offset must always be a multiple of 4. We use
3573 the least significant bit to record whether we have
3574 already generated the necessary reloc. */
3579 bfd_put_32 (output_bfd, relocation,
3580 htab->elf.sgot->contents + off);
3581 local_got_offsets[r_symndx] |= 1;
3583 if (bfd_link_pic (info))
3584 relative_reloc = TRUE;
3591 Elf_Internal_Rela outrel;
3593 s = htab->elf.srelgot;
3597 outrel.r_offset = (htab->elf.sgot->output_section->vma
3598 + htab->elf.sgot->output_offset
3600 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3601 elf_append_rel (output_bfd, s, &outrel);
3604 if (off >= (bfd_vma) -2)
3607 relocation = (htab->elf.sgot->output_section->vma
3608 + htab->elf.sgot->output_offset + off);
3609 if (rel->r_offset > 1
3610 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3611 && *(contents + rel->r_offset - 2) != 0x8d)
3613 if (bfd_link_pic (info))
3615 /* For PIC, disallow R_386_GOT32 without a base
3616 register, except for "lea foo@GOT, %reg", since
3617 we don't know what the GOT base is. */
3621 if (h == NULL || h->root.root.string == NULL)
3622 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3625 name = h->root.root.string;
3628 /* xgettext:c-format */
3629 (_("%B: direct GOT relocation %s against `%s'"
3630 " without base register can not be used"
3631 " when making a shared object"),
3632 input_bfd, howto->name, name);
3633 bfd_set_error (bfd_error_bad_value);
3639 /* Subtract the .got.plt section address only with a base
3641 relocation -= (htab->elf.sgotplt->output_section->vma
3642 + htab->elf.sgotplt->output_offset);
3648 /* Relocation is relative to the start of the global offset
3651 /* Check to make sure it isn't a protected function or data
3652 symbol for shared library since it may not be local when
3653 used as function address or with copy relocation. We also
3654 need to make sure that a symbol is referenced locally. */
3655 if (!bfd_link_executable (info) && h)
3657 if (!h->def_regular)
3661 switch (ELF_ST_VISIBILITY (h->other))
3664 v = _("hidden symbol");
3667 v = _("internal symbol");
3670 v = _("protected symbol");
3678 /* xgettext:c-format */
3679 (_("%B: relocation R_386_GOTOFF against undefined %s"
3680 " `%s' can not be used when making a shared object"),
3681 input_bfd, v, h->root.root.string);
3682 bfd_set_error (bfd_error_bad_value);
3685 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3686 && (h->type == STT_FUNC
3687 || h->type == STT_OBJECT)
3688 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3691 /* xgettext:c-format */
3692 (_("%B: relocation R_386_GOTOFF against protected %s"
3693 " `%s' can not be used when making a shared object"),
3695 h->type == STT_FUNC ? "function" : "data",
3696 h->root.root.string);
3697 bfd_set_error (bfd_error_bad_value);
3702 /* Note that sgot is not involved in this
3703 calculation. We always want the start of .got.plt. If we
3704 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3705 permitted by the ABI, we might have to change this
3707 relocation -= htab->elf.sgotplt->output_section->vma
3708 + htab->elf.sgotplt->output_offset;
3712 /* Use global offset table as symbol value. */
3713 relocation = htab->elf.sgotplt->output_section->vma
3714 + htab->elf.sgotplt->output_offset;
3715 unresolved_reloc = FALSE;
3719 /* Relocation is to the entry for this symbol in the
3720 procedure linkage table. */
3722 /* Resolve a PLT32 reloc against a local symbol directly,
3723 without using the procedure linkage table. */
3727 if ((h->plt.offset == (bfd_vma) -1
3728 && eh->plt_got.offset == (bfd_vma) -1)
3729 || htab->elf.splt == NULL)
3731 /* We didn't make a PLT entry for this symbol. This
3732 happens when statically linking PIC code, or when
3733 using -Bsymbolic. */
3737 if (h->plt.offset != (bfd_vma) -1)
3739 if (htab->plt_second != NULL)
3741 resolved_plt = htab->plt_second;
3742 plt_offset = eh->plt_second.offset;
3746 resolved_plt = htab->elf.splt;
3747 plt_offset = h->plt.offset;
3752 resolved_plt = htab->plt_got;
3753 plt_offset = eh->plt_got.offset;
3756 relocation = (resolved_plt->output_section->vma
3757 + resolved_plt->output_offset
3759 unresolved_reloc = FALSE;
3763 /* Set to symbol size. */
3764 relocation = st_size;
3769 if ((input_section->flags & SEC_ALLOC) == 0
3773 /* Copy dynamic function pointer relocations. Don't generate
3774 dynamic relocations against resolved undefined weak symbols
3775 in PIE, except for R_386_PC32. */
3776 if ((bfd_link_pic (info)
3778 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3779 && (!resolved_to_zero
3780 || r_type == R_386_PC32))
3781 || h->root.type != bfd_link_hash_undefweak))
3782 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3783 || !SYMBOL_CALLS_LOCAL (info, h)))
3784 || (ELIMINATE_COPY_RELOCS
3785 && !bfd_link_pic (info)
3789 || eh->func_pointer_refcount > 0
3790 || (h->root.type == bfd_link_hash_undefweak
3791 && !resolved_to_zero))
3792 && ((h->def_dynamic && !h->def_regular)
3793 /* Undefined weak symbol is bound locally when
3795 || h->root.type == bfd_link_hash_undefweak)))
3797 Elf_Internal_Rela outrel;
3798 bfd_boolean skip, relocate;
3801 /* When generating a shared object, these relocations
3802 are copied into the output file to be resolved at run
3809 _bfd_elf_section_offset (output_bfd, info, input_section,
3811 if (outrel.r_offset == (bfd_vma) -1)
3813 else if (outrel.r_offset == (bfd_vma) -2)
3814 skip = TRUE, relocate = TRUE;
3815 outrel.r_offset += (input_section->output_section->vma
3816 + input_section->output_offset);
3819 memset (&outrel, 0, sizeof outrel);
3822 && (r_type == R_386_PC32
3823 || !(bfd_link_executable (info)
3824 || SYMBOLIC_BIND (info, h))
3825 || !h->def_regular))
3826 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3829 /* This symbol is local, or marked to become local. */
3831 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3834 sreloc = elf_section_data (input_section)->sreloc;
3836 if (sreloc == NULL || sreloc->contents == NULL)
3838 r = bfd_reloc_notsupported;
3839 goto check_relocation_error;
3842 elf_append_rel (output_bfd, sreloc, &outrel);
3844 /* If this reloc is against an external symbol, we do
3845 not want to fiddle with the addend. Otherwise, we
3846 need to include the symbol value so that it becomes
3847 an addend for the dynamic reloc. */
3854 if (!bfd_link_executable (info))
3856 Elf_Internal_Rela outrel;
3859 outrel.r_offset = rel->r_offset
3860 + input_section->output_section->vma
3861 + input_section->output_offset;
3862 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3863 sreloc = elf_section_data (input_section)->sreloc;
3866 elf_append_rel (output_bfd, sreloc, &outrel);
3871 case R_386_TLS_GOTDESC:
3872 case R_386_TLS_DESC_CALL:
3873 case R_386_TLS_IE_32:
3874 case R_386_TLS_GOTIE:
3875 tls_type = GOT_UNKNOWN;
3876 if (h == NULL && local_got_offsets)
3877 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
3879 tls_type = elf_x86_hash_entry(h)->tls_type;
3880 if (tls_type == GOT_TLS_IE)
3881 tls_type = GOT_TLS_IE_NEG;
3883 if (! elf_i386_tls_transition (info, input_bfd,
3884 input_section, contents,
3885 symtab_hdr, sym_hashes,
3886 &r_type, tls_type, rel,
3887 relend, h, r_symndx, TRUE))
3890 if (r_type == R_386_TLS_LE_32)
3892 BFD_ASSERT (! unresolved_reloc);
3893 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3898 /* GD->LE transition. */
3899 type = *(contents + rel->r_offset - 2);
3903 leal foo@tlsgd(,%ebx,1), %eax
3904 call ___tls_get_addr@PLT
3907 subl $foo@tpoff, %eax
3908 (6 byte form of subl). */
3909 roff = rel->r_offset + 5;
3914 leal foo@tlsgd(%ebx), %eax
3915 call ___tls_get_addr@PLT
3918 leal foo@tlsgd(%reg), %eax
3919 call *___tls_get_addr@GOT(%reg)
3920 which may be converted to
3921 addr32 call ___tls_get_addr
3923 movl %gs:0, %eax; subl $foo@tpoff, %eax
3924 (6 byte form of subl). */
3925 roff = rel->r_offset + 6;
3927 memcpy (contents + roff - 8,
3928 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3929 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3931 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
3936 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3938 /* GDesc -> LE transition.
3939 It's originally something like:
3940 leal x@tlsdesc(%ebx), %eax
3944 Registers other than %eax may be set up here. */
3949 roff = rel->r_offset;
3950 val = bfd_get_8 (input_bfd, contents + roff - 1);
3952 /* Now modify the instruction as appropriate. */
3953 /* aoliva FIXME: remove the above and xor the byte
3955 bfd_put_8 (output_bfd, val ^ 0x86,
3956 contents + roff - 1);
3957 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3961 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3963 /* GDesc -> LE transition.
3971 roff = rel->r_offset;
3972 bfd_put_8 (output_bfd, 0x66, contents + roff);
3973 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3976 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3980 /* IE->LE transition:
3981 Originally it can be one of:
3989 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3992 /* movl foo, %eax. */
3993 bfd_put_8 (output_bfd, 0xb8,
3994 contents + rel->r_offset - 1);
4000 type = bfd_get_8 (input_bfd,
4001 contents + rel->r_offset - 2);
4006 bfd_put_8 (output_bfd, 0xc7,
4007 contents + rel->r_offset - 2);
4008 bfd_put_8 (output_bfd,
4009 0xc0 | ((val >> 3) & 7),
4010 contents + rel->r_offset - 1);
4014 bfd_put_8 (output_bfd, 0x81,
4015 contents + rel->r_offset - 2);
4016 bfd_put_8 (output_bfd,
4017 0xc0 | ((val >> 3) & 7),
4018 contents + rel->r_offset - 1);
4025 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4026 contents + rel->r_offset);
4031 unsigned int val, type;
4033 /* {IE_32,GOTIE}->LE transition:
4034 Originally it can be one of:
4035 subl foo(%reg1), %reg2
4036 movl foo(%reg1), %reg2
4037 addl foo(%reg1), %reg2
4040 movl $foo, %reg2 (6 byte form)
4041 addl $foo, %reg2. */
4042 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4043 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4047 bfd_put_8 (output_bfd, 0xc7,
4048 contents + rel->r_offset - 2);
4049 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4050 contents + rel->r_offset - 1);
4052 else if (type == 0x2b)
4055 bfd_put_8 (output_bfd, 0x81,
4056 contents + rel->r_offset - 2);
4057 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4058 contents + rel->r_offset - 1);
4060 else if (type == 0x03)
4063 bfd_put_8 (output_bfd, 0x81,
4064 contents + rel->r_offset - 2);
4065 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4066 contents + rel->r_offset - 1);
4070 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4071 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4072 contents + rel->r_offset);
4074 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4075 contents + rel->r_offset);
4080 if (htab->elf.sgot == NULL)
4085 off = h->got.offset;
4086 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
4090 if (local_got_offsets == NULL)
4093 off = local_got_offsets[r_symndx];
4094 offplt = local_tlsdesc_gotents[r_symndx];
4101 Elf_Internal_Rela outrel;
4105 if (htab->elf.srelgot == NULL)
4108 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4110 if (GOT_TLS_GDESC_P (tls_type))
4113 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4114 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4115 <= htab->elf.sgotplt->size);
4116 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4117 + htab->elf.sgotplt->output_offset
4119 + htab->sgotplt_jump_table_size);
4120 sreloc = htab->elf.srelplt;
4121 loc = sreloc->contents;
4122 loc += (htab->next_tls_desc_index++
4123 * sizeof (Elf32_External_Rel));
4124 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4125 <= sreloc->contents + sreloc->size);
4126 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4129 BFD_ASSERT (! unresolved_reloc);
4130 bfd_put_32 (output_bfd,
4131 relocation - _bfd_x86_elf_dtpoff_base (info),
4132 htab->elf.sgotplt->contents + offplt
4133 + htab->sgotplt_jump_table_size + 4);
4137 bfd_put_32 (output_bfd, 0,
4138 htab->elf.sgotplt->contents + offplt
4139 + htab->sgotplt_jump_table_size + 4);
4143 sreloc = htab->elf.srelgot;
4145 outrel.r_offset = (htab->elf.sgot->output_section->vma
4146 + htab->elf.sgot->output_offset + off);
4148 if (GOT_TLS_GD_P (tls_type))
4149 dr_type = R_386_TLS_DTPMOD32;
4150 else if (GOT_TLS_GDESC_P (tls_type))
4152 else if (tls_type == GOT_TLS_IE_POS)
4153 dr_type = R_386_TLS_TPOFF;
4155 dr_type = R_386_TLS_TPOFF32;
4157 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4158 bfd_put_32 (output_bfd,
4159 relocation - _bfd_x86_elf_dtpoff_base (info),
4160 htab->elf.sgot->contents + off);
4161 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4162 bfd_put_32 (output_bfd,
4163 _bfd_x86_elf_dtpoff_base (info) - relocation,
4164 htab->elf.sgot->contents + off);
4165 else if (dr_type != R_386_TLS_DESC)
4166 bfd_put_32 (output_bfd, 0,
4167 htab->elf.sgot->contents + off);
4168 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4170 elf_append_rel (output_bfd, sreloc, &outrel);
4172 if (GOT_TLS_GD_P (tls_type))
4176 BFD_ASSERT (! unresolved_reloc);
4177 bfd_put_32 (output_bfd,
4178 relocation - _bfd_x86_elf_dtpoff_base (info),
4179 htab->elf.sgot->contents + off + 4);
4183 bfd_put_32 (output_bfd, 0,
4184 htab->elf.sgot->contents + off + 4);
4185 outrel.r_info = ELF32_R_INFO (indx,
4186 R_386_TLS_DTPOFF32);
4187 outrel.r_offset += 4;
4188 elf_append_rel (output_bfd, sreloc, &outrel);
4191 else if (tls_type == GOT_TLS_IE_BOTH)
4193 bfd_put_32 (output_bfd,
4195 ? relocation - _bfd_x86_elf_dtpoff_base (info)
4197 htab->elf.sgot->contents + off + 4);
4198 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4199 outrel.r_offset += 4;
4200 elf_append_rel (output_bfd, sreloc, &outrel);
4207 local_got_offsets[r_symndx] |= 1;
4210 if (off >= (bfd_vma) -2
4211 && ! GOT_TLS_GDESC_P (tls_type))
4213 if (r_type == R_386_TLS_GOTDESC
4214 || r_type == R_386_TLS_DESC_CALL)
4216 relocation = htab->sgotplt_jump_table_size + offplt;
4217 unresolved_reloc = FALSE;
4219 else if (r_type == ELF32_R_TYPE (rel->r_info))
4221 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4222 + htab->elf.sgotplt->output_offset;
4223 relocation = htab->elf.sgot->output_section->vma
4224 + htab->elf.sgot->output_offset + off - g_o_t;
4225 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4226 && tls_type == GOT_TLS_IE_BOTH)
4228 if (r_type == R_386_TLS_IE)
4229 relocation += g_o_t;
4230 unresolved_reloc = FALSE;
4232 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4234 unsigned int val, type;
4237 /* GD->IE transition. */
4238 type = *(contents + rel->r_offset - 2);
4239 val = *(contents + rel->r_offset - 1);
4243 leal foo@tlsgd(,%ebx,1), %eax
4244 call ___tls_get_addr@PLT
4247 subl $foo@gottpoff(%ebx), %eax. */
4249 roff = rel->r_offset - 3;
4254 leal foo@tlsgd(%ebx), %eax
4255 call ___tls_get_addr@PLT
4258 leal foo@tlsgd(%reg), %eax
4259 call *___tls_get_addr@GOT(%reg)
4260 which may be converted to
4261 addr32 call ___tls_get_addr
4264 subl $foo@gottpoff(%reg), %eax. */
4265 roff = rel->r_offset - 2;
4267 memcpy (contents + roff,
4268 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4269 contents[roff + 7] = 0x80 | (val & 7);
4270 /* If foo is used only with foo@gotntpoff(%reg) and
4271 foo@indntpoff, but not with foo@gottpoff(%reg), change
4272 subl $foo@gottpoff(%reg), %eax
4274 addl $foo@gotntpoff(%reg), %eax. */
4275 if (tls_type == GOT_TLS_IE_POS)
4276 contents[roff + 6] = 0x03;
4277 bfd_put_32 (output_bfd,
4278 htab->elf.sgot->output_section->vma
4279 + htab->elf.sgot->output_offset + off
4280 - htab->elf.sgotplt->output_section->vma
4281 - htab->elf.sgotplt->output_offset,
4282 contents + roff + 8);
4283 /* Skip R_386_PLT32 and R_386_GOT32X. */
4288 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4290 /* GDesc -> IE transition.
4291 It's originally something like:
4292 leal x@tlsdesc(%ebx), %eax
4295 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4297 movl x@gottpoff(%ebx), %eax # before negl %eax
4299 Registers other than %eax may be set up here. */
4303 /* First, make sure it's a leal adding ebx to a 32-bit
4304 offset into any register, although it's probably
4305 almost always going to be eax. */
4306 roff = rel->r_offset;
4308 /* Now modify the instruction as appropriate. */
4309 /* To turn a leal into a movl in the form we use it, it
4310 suffices to change the first byte from 0x8d to 0x8b.
4311 aoliva FIXME: should we decide to keep the leal, all
4312 we have to do is remove the statement below, and
4313 adjust the relaxation of R_386_TLS_DESC_CALL. */
4314 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4316 if (tls_type == GOT_TLS_IE_BOTH)
4319 bfd_put_32 (output_bfd,
4320 htab->elf.sgot->output_section->vma
4321 + htab->elf.sgot->output_offset + off
4322 - htab->elf.sgotplt->output_section->vma
4323 - htab->elf.sgotplt->output_offset,
4327 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4329 /* GDesc -> IE transition.
4337 depending on how we transformed the TLS_GOTDESC above.
4342 roff = rel->r_offset;
4344 /* Now modify the instruction as appropriate. */
4345 if (tls_type != GOT_TLS_IE_NEG)
4348 bfd_put_8 (output_bfd, 0x66, contents + roff);
4349 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4354 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4355 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4365 if (! elf_i386_tls_transition (info, input_bfd,
4366 input_section, contents,
4367 symtab_hdr, sym_hashes,
4368 &r_type, GOT_UNKNOWN, rel,
4369 relend, h, r_symndx, TRUE))
4372 if (r_type != R_386_TLS_LDM)
4374 /* LD->LE transition. Change
4375 leal foo@tlsldm(%ebx) %eax
4376 call ___tls_get_addr@PLT
4380 leal 0(%esi,1), %esi
4382 leal foo@tlsldm(%reg) %eax
4383 call *___tls_get_addr@GOT(%reg)
4384 which may be converted to
4385 addr32 call ___tls_get_addr
4388 leal 0(%esi), %esi */
4389 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4390 if (*(contents + rel->r_offset + 4) == 0xff
4391 || *(contents + rel->r_offset + 4) == 0x67)
4392 memcpy (contents + rel->r_offset - 2,
4393 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
4395 memcpy (contents + rel->r_offset - 2,
4396 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4397 /* Skip R_386_PC32/R_386_PLT32. */
4403 if (htab->elf.sgot == NULL)
4406 off = htab->tls_ld_or_ldm_got.offset;
4411 Elf_Internal_Rela outrel;
4413 if (htab->elf.srelgot == NULL)
4416 outrel.r_offset = (htab->elf.sgot->output_section->vma
4417 + htab->elf.sgot->output_offset + off);
4419 bfd_put_32 (output_bfd, 0,
4420 htab->elf.sgot->contents + off);
4421 bfd_put_32 (output_bfd, 0,
4422 htab->elf.sgot->contents + off + 4);
4423 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4424 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4425 htab->tls_ld_or_ldm_got.offset |= 1;
4427 relocation = htab->elf.sgot->output_section->vma
4428 + htab->elf.sgot->output_offset + off
4429 - htab->elf.sgotplt->output_section->vma
4430 - htab->elf.sgotplt->output_offset;
4431 unresolved_reloc = FALSE;
4434 case R_386_TLS_LDO_32:
4435 if (!bfd_link_executable (info)
4436 || (input_section->flags & SEC_CODE) == 0)
4437 relocation -= _bfd_x86_elf_dtpoff_base (info);
4439 /* When converting LDO to LE, we must negate. */
4440 relocation = -elf_i386_tpoff (info, relocation);
4443 case R_386_TLS_LE_32:
4445 if (!bfd_link_executable (info))
4447 Elf_Internal_Rela outrel;
4450 outrel.r_offset = rel->r_offset
4451 + input_section->output_section->vma
4452 + input_section->output_offset;
4453 if (h != NULL && h->dynindx != -1)
4457 if (r_type == R_386_TLS_LE_32)
4458 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4460 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4461 sreloc = elf_section_data (input_section)->sreloc;
4464 elf_append_rel (output_bfd, sreloc, &outrel);
4467 else if (r_type == R_386_TLS_LE_32)
4468 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
4470 relocation -= _bfd_x86_elf_dtpoff_base (info);
4472 else if (r_type == R_386_TLS_LE_32)
4473 relocation = elf_i386_tpoff (info, relocation);
4475 relocation = -elf_i386_tpoff (info, relocation);
4482 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4483 because such sections are not SEC_ALLOC and thus ld.so will
4484 not process them. */
4485 if (unresolved_reloc
4486 && !((input_section->flags & SEC_DEBUGGING) != 0
4488 && _bfd_elf_section_offset (output_bfd, info, input_section,
4489 rel->r_offset) != (bfd_vma) -1)
4492 /* xgettext:c-format */
4493 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
4498 h->root.root.string);
4503 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4504 contents, rel->r_offset,
4507 check_relocation_error:
4508 if (r != bfd_reloc_ok)
4513 name = h->root.root.string;
4516 name = bfd_elf_string_from_elf_section (input_bfd,
4517 symtab_hdr->sh_link,
4522 name = bfd_section_name (input_bfd, sec);
4525 if (r == bfd_reloc_overflow)
4526 (*info->callbacks->reloc_overflow)
4527 (info, (h ? &h->root : NULL), name, howto->name,
4528 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
4532 /* xgettext:c-format */
4533 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
4534 input_bfd, input_section,
4535 rel->r_offset, name, (int) r);
4546 Elf_Internal_Shdr *rel_hdr;
4547 size_t deleted = rel - wrel;
4549 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4550 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4551 if (rel_hdr->sh_size == 0)
4553 /* It is too late to remove an empty reloc section. Leave
4555 ??? What is wrong with an empty section??? */
4556 rel_hdr->sh_size = rel_hdr->sh_entsize;
4559 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4560 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4561 input_section->reloc_count -= deleted;
4567 /* Finish up dynamic symbol handling. We set the contents of various
4568 dynamic sections here. */
4571 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4572 struct bfd_link_info *info,
4573 struct elf_link_hash_entry *h,
4574 Elf_Internal_Sym *sym)
4576 struct elf_x86_link_hash_table *htab;
4577 unsigned plt_entry_size;
4578 struct elf_x86_link_hash_entry *eh;
4579 bfd_boolean local_undefweak;
4580 bfd_boolean use_plt_second;
4582 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4586 plt_entry_size = htab->plt.plt_entry_size;
4588 /* Use the second PLT section only if there is .plt section. */
4589 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
4591 eh = (struct elf_x86_link_hash_entry *) h;
4592 if (eh->no_finish_dynamic_symbol)
4595 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4596 resolved undefined weak symbols in executable so that their
4597 references have value 0 at run-time. */
4598 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, I386_ELF_DATA,
4602 if (h->plt.offset != (bfd_vma) -1)
4604 bfd_vma plt_index, plt_offset;
4606 Elf_Internal_Rela rel;
4608 asection *plt, *resolved_plt, *gotplt, *relplt;
4610 /* When building a static executable, use .iplt, .igot.plt and
4611 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4612 if (htab->elf.splt != NULL)
4614 plt = htab->elf.splt;
4615 gotplt = htab->elf.sgotplt;
4616 relplt = htab->elf.srelplt;
4620 plt = htab->elf.iplt;
4621 gotplt = htab->elf.igotplt;
4622 relplt = htab->elf.irelplt;
4625 /* This symbol has an entry in the procedure linkage table. Set
4628 if ((h->dynindx == -1
4630 && !((h->forced_local || bfd_link_executable (info))
4632 && h->type == STT_GNU_IFUNC))
4638 /* Get the index in the procedure linkage table which
4639 corresponds to this symbol. This is the index of this symbol
4640 in all the symbols for which we are making plt entries. The
4641 first entry in the procedure linkage table is reserved.
4643 Get the offset into the .got table of the entry that
4644 corresponds to this function. Each .got entry is 4 bytes.
4645 The first three are reserved.
4647 For static executables, we don't reserve anything. */
4649 if (plt == htab->elf.splt)
4651 got_offset = (h->plt.offset / plt_entry_size
4652 - htab->plt.has_plt0);
4653 got_offset = (got_offset + 3) * 4;
4657 got_offset = h->plt.offset / plt_entry_size;
4658 got_offset = got_offset * 4;
4661 /* Fill in the entry in the procedure linkage table and update
4663 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
4668 const bfd_byte *plt_entry;
4669 if (bfd_link_pic (info))
4670 plt_entry = htab->non_lazy_plt->pic_plt_entry;
4672 plt_entry = htab->non_lazy_plt->plt_entry;
4673 memcpy (htab->plt_second->contents + eh->plt_second.offset,
4674 plt_entry, htab->non_lazy_plt->plt_entry_size);
4676 resolved_plt = htab->plt_second;
4677 plt_offset = eh->plt_second.offset;
4682 plt_offset = h->plt.offset;
4685 if (! bfd_link_pic (info))
4687 bfd_put_32 (output_bfd,
4688 (gotplt->output_section->vma
4689 + gotplt->output_offset
4691 resolved_plt->contents + plt_offset
4692 + htab->plt.plt_got_offset);
4694 if (htab->is_vxworks)
4696 int s, k, reloc_index;
4698 /* Create the R_386_32 relocation referencing the GOT
4699 for this PLT entry. */
4701 /* S: Current slot number (zero-based). */
4702 s = ((h->plt.offset - htab->plt.plt_entry_size)
4703 / htab->plt.plt_entry_size);
4704 /* K: Number of relocations for PLTResolve. */
4705 if (bfd_link_pic (info))
4706 k = PLTRESOLVE_RELOCS_SHLIB;
4708 k = PLTRESOLVE_RELOCS;
4709 /* Skip the PLTresolve relocations, and the relocations for
4710 the other PLT slots. */
4711 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4712 loc = (htab->srelplt2->contents + reloc_index
4713 * sizeof (Elf32_External_Rel));
4715 rel.r_offset = (plt->output_section->vma
4716 + plt->output_offset
4717 + h->plt.offset + 2),
4718 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4719 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4721 /* Create the R_386_32 relocation referencing the beginning of
4722 the PLT for this GOT entry. */
4723 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4724 + htab->elf.sgotplt->output_offset
4726 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4727 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4728 loc + sizeof (Elf32_External_Rel));
4733 bfd_put_32 (output_bfd, got_offset,
4734 resolved_plt->contents + plt_offset
4735 + htab->plt.plt_got_offset);
4738 /* Fill in the entry in the global offset table. Leave the entry
4739 as zero for undefined weak symbol in PIE. No PLT relocation
4740 against undefined weak symbol in PIE. */
4741 if (!local_undefweak)
4743 if (htab->plt.has_plt0)
4744 bfd_put_32 (output_bfd,
4745 (plt->output_section->vma
4746 + plt->output_offset
4748 + htab->lazy_plt->plt_lazy_offset),
4749 gotplt->contents + got_offset);
4751 /* Fill in the entry in the .rel.plt section. */
4752 rel.r_offset = (gotplt->output_section->vma
4753 + gotplt->output_offset
4755 if (h->dynindx == -1
4756 || ((bfd_link_executable (info)
4757 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4759 && h->type == STT_GNU_IFUNC))
4761 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4762 h->root.root.string,
4763 h->root.u.def.section->owner);
4765 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4766 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4767 in the .got.plt section. */
4768 bfd_put_32 (output_bfd,
4769 (h->root.u.def.value
4770 + h->root.u.def.section->output_section->vma
4771 + h->root.u.def.section->output_offset),
4772 gotplt->contents + got_offset);
4773 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4774 /* R_386_IRELATIVE comes last. */
4775 plt_index = htab->next_irelative_index--;
4779 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4780 plt_index = htab->next_jump_slot_index++;
4783 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4784 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4786 /* Don't fill the second and third slots in PLT entry for
4787 static executables nor without PLT0. */
4788 if (plt == htab->elf.splt && htab->plt.has_plt0)
4790 bfd_put_32 (output_bfd,
4791 plt_index * sizeof (Elf32_External_Rel),
4792 plt->contents + h->plt.offset
4793 + htab->lazy_plt->plt_reloc_offset);
4794 bfd_put_32 (output_bfd,
4796 + htab->lazy_plt->plt_plt_offset + 4),
4797 (plt->contents + h->plt.offset
4798 + htab->lazy_plt->plt_plt_offset));
4802 else if (eh->plt_got.offset != (bfd_vma) -1)
4804 bfd_vma got_offset, plt_offset;
4805 asection *plt, *got, *gotplt;
4806 const bfd_byte *got_plt_entry;
4808 /* Set the entry in the GOT procedure linkage table. */
4809 plt = htab->plt_got;
4810 got = htab->elf.sgot;
4811 gotplt = htab->elf.sgotplt;
4812 got_offset = h->got.offset;
4814 if (got_offset == (bfd_vma) -1
4820 /* Fill in the entry in the GOT procedure linkage table. */
4821 if (! bfd_link_pic (info))
4823 got_plt_entry = htab->non_lazy_plt->plt_entry;
4824 got_offset += got->output_section->vma + got->output_offset;
4828 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
4829 got_offset += (got->output_section->vma
4830 + got->output_offset
4831 - gotplt->output_section->vma
4832 - gotplt->output_offset);
4835 plt_offset = eh->plt_got.offset;
4836 memcpy (plt->contents + plt_offset, got_plt_entry,
4837 htab->non_lazy_plt->plt_entry_size);
4838 bfd_put_32 (output_bfd, got_offset,
4839 (plt->contents + plt_offset
4840 + htab->non_lazy_plt->plt_got_offset));
4843 if (!local_undefweak
4845 && (h->plt.offset != (bfd_vma) -1
4846 || eh->plt_got.offset != (bfd_vma) -1))
4848 /* Mark the symbol as undefined, rather than as defined in
4849 the .plt section. Leave the value if there were any
4850 relocations where pointer equality matters (this is a clue
4851 for the dynamic linker, to make function pointer
4852 comparisons work between an application and shared
4853 library), otherwise set it to zero. If a function is only
4854 called from a binary, there is no need to slow down
4855 shared libraries because of that. */
4856 sym->st_shndx = SHN_UNDEF;
4857 if (!h->pointer_equality_needed)
4861 /* Don't generate dynamic GOT relocation against undefined weak
4862 symbol in executable. */
4863 if (h->got.offset != (bfd_vma) -1
4864 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
4865 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
4866 && !local_undefweak)
4868 Elf_Internal_Rela rel;
4869 asection *relgot = htab->elf.srelgot;
4871 /* This symbol has an entry in the global offset table. Set it
4874 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4877 rel.r_offset = (htab->elf.sgot->output_section->vma
4878 + htab->elf.sgot->output_offset
4879 + (h->got.offset & ~(bfd_vma) 1));
4881 /* If this is a static link, or it is a -Bsymbolic link and the
4882 symbol is defined locally or was forced to be local because
4883 of a version file, we just want to emit a RELATIVE reloc.
4884 The entry in the global offset table will already have been
4885 initialized in the relocate_section function. */
4887 && h->type == STT_GNU_IFUNC)
4889 if (h->plt.offset == (bfd_vma) -1)
4891 /* STT_GNU_IFUNC is referenced without PLT. */
4892 if (htab->elf.splt == NULL)
4894 /* use .rel[a].iplt section to store .got relocations
4895 in static executable. */
4896 relgot = htab->elf.irelplt;
4898 if (SYMBOL_REFERENCES_LOCAL (info, h))
4900 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4901 h->root.root.string,
4902 h->root.u.def.section->owner);
4904 bfd_put_32 (output_bfd,
4905 (h->root.u.def.value
4906 + h->root.u.def.section->output_section->vma
4907 + h->root.u.def.section->output_offset),
4908 htab->elf.sgot->contents + h->got.offset);
4909 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4914 else if (bfd_link_pic (info))
4916 /* Generate R_386_GLOB_DAT. */
4924 if (!h->pointer_equality_needed)
4927 /* For non-shared object, we can't use .got.plt, which
4928 contains the real function addres if we need pointer
4929 equality. We load the GOT entry with the PLT entry. */
4930 if (htab->plt_second != NULL)
4932 plt = htab->plt_second;
4933 plt_offset = eh->plt_second.offset;
4937 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4938 plt_offset = h->plt.offset;
4940 bfd_put_32 (output_bfd,
4941 (plt->output_section->vma
4942 + plt->output_offset + plt_offset),
4943 htab->elf.sgot->contents + h->got.offset);
4947 else if (bfd_link_pic (info)
4948 && SYMBOL_REFERENCES_LOCAL (info, h))
4950 BFD_ASSERT((h->got.offset & 1) != 0);
4951 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4955 BFD_ASSERT((h->got.offset & 1) == 0);
4957 bfd_put_32 (output_bfd, (bfd_vma) 0,
4958 htab->elf.sgot->contents + h->got.offset);
4959 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4962 elf_append_rel (output_bfd, relgot, &rel);
4967 Elf_Internal_Rela rel;
4970 /* This symbol needs a copy reloc. Set it up. */
4972 if (h->dynindx == -1
4973 || (h->root.type != bfd_link_hash_defined
4974 && h->root.type != bfd_link_hash_defweak)
4975 || htab->elf.srelbss == NULL
4976 || htab->elf.sreldynrelro == NULL)
4979 rel.r_offset = (h->root.u.def.value
4980 + h->root.u.def.section->output_section->vma
4981 + h->root.u.def.section->output_offset);
4982 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4983 if (h->root.u.def.section == htab->elf.sdynrelro)
4984 s = htab->elf.sreldynrelro;
4986 s = htab->elf.srelbss;
4987 elf_append_rel (output_bfd, s, &rel);
4993 /* Finish up local dynamic symbol handling. We set the contents of
4994 various dynamic sections here. */
4997 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4999 struct elf_link_hash_entry *h
5000 = (struct elf_link_hash_entry *) *slot;
5001 struct bfd_link_info *info
5002 = (struct bfd_link_info *) inf;
5004 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5008 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5009 here since undefined weak symbol may not be dynamic and may not be
5010 called for elf_i386_finish_dynamic_symbol. */
5013 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5016 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5017 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5019 if (h->root.type != bfd_link_hash_undefweak
5020 || h->dynindx != -1)
5023 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5027 /* Used to decide how to sort relocs in an optimal manner for the
5028 dynamic linker, before writing them out. */
5030 static enum elf_reloc_type_class
5031 elf_i386_reloc_type_class (const struct bfd_link_info *info,
5032 const asection *rel_sec ATTRIBUTE_UNUSED,
5033 const Elf_Internal_Rela *rela)
5035 bfd *abfd = info->output_bfd;
5036 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5037 struct elf_link_hash_table *htab = elf_hash_table (info);
5039 if (htab->dynsym != NULL
5040 && htab->dynsym->contents != NULL)
5042 /* Check relocation against STT_GNU_IFUNC symbol if there are
5044 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5045 if (r_symndx != STN_UNDEF)
5047 Elf_Internal_Sym sym;
5048 if (!bed->s->swap_symbol_in (abfd,
5049 (htab->dynsym->contents
5050 + r_symndx * sizeof (Elf32_External_Sym)),
5054 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5055 return reloc_class_ifunc;
5059 switch (ELF32_R_TYPE (rela->r_info))
5061 case R_386_IRELATIVE:
5062 return reloc_class_ifunc;
5063 case R_386_RELATIVE:
5064 return reloc_class_relative;
5065 case R_386_JUMP_SLOT:
5066 return reloc_class_plt;
5068 return reloc_class_copy;
5070 return reloc_class_normal;
5074 /* Finish up the dynamic sections. */
5077 elf_i386_finish_dynamic_sections (bfd *output_bfd,
5078 struct bfd_link_info *info)
5080 struct elf_x86_link_hash_table *htab;
5083 const struct elf_i386_backend_data *abed;
5085 htab = elf_x86_hash_table (info, I386_ELF_DATA);
5089 dynobj = htab->elf.dynobj;
5090 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5091 abed = get_elf_i386_backend_data (output_bfd);
5093 if (htab->elf.dynamic_sections_created)
5095 Elf32_External_Dyn *dyncon, *dynconend;
5097 if (sdyn == NULL || htab->elf.sgot == NULL)
5100 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5101 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5102 for (; dyncon < dynconend; dyncon++)
5104 Elf_Internal_Dyn dyn;
5107 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5112 if (htab->is_vxworks
5113 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5118 s = htab->elf.sgotplt;
5119 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5123 s = htab->elf.srelplt;
5124 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5128 s = htab->elf.srelplt;
5129 dyn.d_un.d_val = s->size;
5133 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5136 if (htab->elf.splt && htab->elf.splt->size > 0)
5138 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5139 really seem like the right value. */
5140 elf_section_data (htab->elf.splt->output_section)
5141 ->this_hdr.sh_entsize = 4;
5143 if (htab->plt.has_plt0)
5145 /* Fill in the special first entry in the procedure linkage
5147 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
5148 htab->lazy_plt->plt0_entry_size);
5149 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
5150 abed->plt0_pad_byte,
5151 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
5152 if (!bfd_link_pic (info))
5154 bfd_put_32 (output_bfd,
5155 (htab->elf.sgotplt->output_section->vma
5156 + htab->elf.sgotplt->output_offset
5158 htab->elf.splt->contents
5159 + htab->lazy_plt->plt0_got1_offset);
5160 bfd_put_32 (output_bfd,
5161 (htab->elf.sgotplt->output_section->vma
5162 + htab->elf.sgotplt->output_offset
5164 htab->elf.splt->contents
5165 + htab->lazy_plt->plt0_got2_offset);
5167 if (htab->is_vxworks)
5169 Elf_Internal_Rela rel;
5170 int num_plts = (htab->elf.splt->size
5171 / htab->plt.plt_entry_size) - 1;
5173 asection *srelplt2 = htab->srelplt2;
5175 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5176 + 4. On IA32 we use REL relocations so the
5177 addend goes in the PLT directly. */
5178 rel.r_offset = (htab->elf.splt->output_section->vma
5179 + htab->elf.splt->output_offset
5180 + htab->lazy_plt->plt0_got1_offset);
5181 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5183 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5184 srelplt2->contents);
5185 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5187 rel.r_offset = (htab->elf.splt->output_section->vma
5188 + htab->elf.splt->output_offset
5189 + htab->lazy_plt->plt0_got2_offset);
5190 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5192 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5193 srelplt2->contents +
5194 sizeof (Elf32_External_Rel));
5195 /* Correct the .rel.plt.unloaded relocations. */
5196 p = srelplt2->contents;
5197 if (bfd_link_pic (info))
5198 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5200 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5202 for (; num_plts; num_plts--)
5204 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5205 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5207 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5208 p += sizeof (Elf32_External_Rel);
5210 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5211 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
5213 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5214 p += sizeof (Elf32_External_Rel);
5221 if (htab->plt_got != NULL && htab->plt_got->size > 0)
5222 elf_section_data (htab->plt_got->output_section)
5223 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
5225 if (htab->plt_second != NULL && htab->plt_second->size > 0)
5226 elf_section_data (htab->plt_second->output_section)
5227 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
5230 /* Fill in the first three entries in the global offset table. */
5231 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
5233 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5236 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5240 bfd_put_32 (output_bfd,
5242 : sdyn->output_section->vma + sdyn->output_offset),
5243 htab->elf.sgotplt->contents);
5244 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5245 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5247 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5250 /* Adjust .eh_frame for .plt section. */
5251 if (htab->plt_eh_frame != NULL
5252 && htab->plt_eh_frame->contents != NULL)
5254 if (htab->elf.splt != NULL
5255 && htab->elf.splt->size != 0
5256 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5257 && htab->elf.splt->output_section != NULL
5258 && htab->plt_eh_frame->output_section != NULL)
5260 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5261 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5262 + htab->plt_eh_frame->output_offset
5263 + PLT_FDE_START_OFFSET;
5264 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5265 htab->plt_eh_frame->contents
5266 + PLT_FDE_START_OFFSET);
5268 if (htab->plt_eh_frame->sec_info_type
5269 == SEC_INFO_TYPE_EH_FRAME)
5271 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5273 htab->plt_eh_frame->contents))
5278 /* Adjust .eh_frame for .plt.got section. */
5279 if (htab->plt_got_eh_frame != NULL
5280 && htab->plt_got_eh_frame->contents != NULL)
5282 if (htab->plt_got != NULL
5283 && htab->plt_got->size != 0
5284 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
5285 && htab->plt_got->output_section != NULL
5286 && htab->plt_got_eh_frame->output_section != NULL)
5288 bfd_vma plt_start = htab->plt_got->output_section->vma;
5289 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
5290 + htab->plt_got_eh_frame->output_offset
5291 + PLT_FDE_START_OFFSET;
5292 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5293 htab->plt_got_eh_frame->contents
5294 + PLT_FDE_START_OFFSET);
5296 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5298 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5299 htab->plt_got_eh_frame,
5300 htab->plt_got_eh_frame->contents))
5305 /* Adjust .eh_frame for the second PLT section. */
5306 if (htab->plt_second_eh_frame != NULL
5307 && htab->plt_second_eh_frame->contents != NULL)
5309 if (htab->plt_second != NULL
5310 && htab->plt_second->size != 0
5311 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
5312 && htab->plt_second->output_section != NULL
5313 && htab->plt_second_eh_frame->output_section != NULL)
5315 bfd_vma plt_start = htab->plt_second->output_section->vma;
5316 bfd_vma eh_frame_start
5317 = (htab->plt_second_eh_frame->output_section->vma
5318 + htab->plt_second_eh_frame->output_offset
5319 + PLT_FDE_START_OFFSET);
5320 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5321 htab->plt_second_eh_frame->contents
5322 + PLT_FDE_START_OFFSET);
5324 if (htab->plt_second_eh_frame->sec_info_type
5325 == SEC_INFO_TYPE_EH_FRAME)
5327 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5328 htab->plt_second_eh_frame,
5329 htab->plt_second_eh_frame->contents))
5334 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5335 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5337 /* Fill PLT entries for undefined weak symbols in PIE. */
5338 if (bfd_link_pie (info))
5339 bfd_hash_traverse (&info->hash->table,
5340 elf_i386_pie_finish_undefweak_symbol,
5346 /* Fill PLT/GOT entries and allocate dynamic relocations for local
5347 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5348 It has to be done before elf_link_sort_relocs is called so that
5349 dynamic relocations are properly sorted. */
5352 elf_i386_output_arch_local_syms
5353 (bfd *output_bfd ATTRIBUTE_UNUSED,
5354 struct bfd_link_info *info,
5355 void *flaginfo ATTRIBUTE_UNUSED,
5356 int (*func) (void *, const char *,
5359 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
5361 struct elf_x86_link_hash_table *htab
5362 = elf_x86_hash_table (info, I386_ELF_DATA);
5366 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5367 htab_traverse (htab->loc_hash_table,
5368 elf_i386_finish_local_dynamic_symbol,
5374 /* Forward declaration. */
5375 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
5377 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
5378 dynamic relocations. */
5381 elf_i386_get_synthetic_symtab (bfd *abfd,
5382 long symcount ATTRIBUTE_UNUSED,
5383 asymbol **syms ATTRIBUTE_UNUSED,
5390 bfd_byte *plt_contents;
5392 const struct elf_x86_lazy_plt_layout *lazy_plt;
5393 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
5394 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
5395 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
5398 enum elf_x86_plt_type plt_type;
5399 struct elf_x86_plt plts[] =
5401 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
5402 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
5403 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
5404 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
5409 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
5412 if (dynsymcount <= 0)
5415 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
5419 non_lazy_plt = NULL;
5420 /* Silence GCC 6. */
5422 non_lazy_ibt_plt = NULL;
5423 lazy_ibt_plt = NULL;
5424 switch (get_elf_i386_backend_data (abfd)->os)
5427 non_lazy_plt = &elf_i386_non_lazy_plt;
5428 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5429 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
5432 lazy_plt = &elf_i386_lazy_plt;
5435 lazy_plt = &elf_i386_nacl_plt;
5442 for (j = 0; plts[j].name != NULL; j++)
5444 plt = bfd_get_section_by_name (abfd, plts[j].name);
5445 if (plt == NULL || plt->size == 0)
5448 /* Get the PLT section contents. */
5449 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5450 if (plt_contents == NULL)
5452 if (!bfd_get_section_contents (abfd, (asection *) plt,
5453 plt_contents, 0, plt->size))
5455 free (plt_contents);
5459 /* Check what kind of PLT it is. */
5460 plt_type = plt_unknown;
5461 if (plts[j].type == plt_unknown
5462 && (plt->size >= (lazy_plt->plt0_entry_size
5463 + lazy_plt->plt_entry_size)))
5465 /* Match lazy PLT first. */
5466 if (memcmp (plt_contents, lazy_plt->plt0_entry,
5467 lazy_plt->plt0_got1_offset) == 0)
5469 /* The fist entry in the lazy IBT PLT is the same as the
5471 if (lazy_ibt_plt != NULL
5472 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
5473 lazy_ibt_plt->plt_entry,
5474 lazy_ibt_plt->plt_got_offset) == 0))
5475 plt_type = plt_lazy | plt_second;
5477 plt_type = plt_lazy;
5479 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
5480 lazy_plt->plt0_got1_offset) == 0)
5482 /* The fist entry in the PIC lazy IBT PLT is the same as
5483 the normal PIC lazy PLT. */
5484 if (lazy_ibt_plt != NULL
5485 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
5486 lazy_ibt_plt->pic_plt_entry,
5487 lazy_ibt_plt->plt_got_offset) == 0))
5488 plt_type = plt_lazy | plt_pic | plt_second;
5490 plt_type = plt_lazy | plt_pic;
5494 if (non_lazy_plt != NULL
5495 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
5496 && plt->size >= non_lazy_plt->plt_entry_size)
5498 /* Match non-lazy PLT. */
5499 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
5500 non_lazy_plt->plt_got_offset) == 0)
5501 plt_type = plt_non_lazy;
5502 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
5503 non_lazy_plt->plt_got_offset) == 0)
5507 if ((non_lazy_ibt_plt != NULL)
5508 && (plt_type == plt_unknown || plt_type == plt_second)
5509 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
5511 if (memcmp (plt_contents,
5512 non_lazy_ibt_plt->plt_entry,
5513 non_lazy_ibt_plt->plt_got_offset) == 0)
5515 /* Match IBT PLT. */
5516 plt_type = plt_second;
5517 non_lazy_plt = non_lazy_ibt_plt;
5519 else if (memcmp (plt_contents,
5520 non_lazy_ibt_plt->pic_plt_entry,
5521 non_lazy_ibt_plt->plt_got_offset) == 0)
5523 /* Match PIC IBT PLT. */
5524 plt_type = plt_second | plt_pic;
5525 non_lazy_plt = non_lazy_ibt_plt;
5529 if (plt_type == plt_unknown)
5531 free (plt_contents);
5536 plts[j].type = plt_type;
5538 if ((plt_type & plt_lazy))
5540 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
5541 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
5542 /* Skip PLT0 in lazy PLT. */
5547 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
5548 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
5552 /* Skip lazy PLT when the second PLT is used. */
5553 if ((plt_type & (plt_lazy | plt_second))
5554 == (plt_lazy | plt_second))
5558 n = plt->size / plts[j].plt_entry_size;
5563 plts[j].contents = plt_contents;
5565 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
5566 if ((plt_type & plt_pic))
5567 got_addr = (bfd_vma) -1;
5570 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
5571 got_addr, plts, dynsyms,
5575 /* Set up i386 GNU properties. Return the first relocatable ELF input
5576 with GNU properties if found. Otherwise, return NULL. */
5579 elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
5581 struct elf_x86_plt_layout_table plt_layout;
5583 plt_layout.normal_target = FALSE;
5584 plt_layout.is_vxworks = FALSE;
5585 switch (get_elf_i386_backend_data (info->output_bfd)->os)
5588 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5589 plt_layout.non_lazy_plt = &elf_i386_non_lazy_plt;
5590 plt_layout.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5591 plt_layout.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
5592 plt_layout.normal_target = TRUE;
5595 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5596 plt_layout.non_lazy_plt = NULL;
5597 plt_layout.lazy_ibt_plt = NULL;
5598 plt_layout.non_lazy_ibt_plt = NULL;
5599 plt_layout.is_vxworks = TRUE;
5602 plt_layout.lazy_plt = &elf_i386_nacl_plt;
5603 plt_layout.non_lazy_plt = NULL;
5604 plt_layout.lazy_ibt_plt = NULL;
5605 plt_layout.non_lazy_ibt_plt = NULL;
5609 return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout);
5612 #define TARGET_LITTLE_SYM i386_elf32_vec
5613 #define TARGET_LITTLE_NAME "elf32-i386"
5614 #define ELF_ARCH bfd_arch_i386
5615 #define ELF_TARGET_ID I386_ELF_DATA
5616 #define ELF_MACHINE_CODE EM_386
5617 #define ELF_MAXPAGESIZE 0x1000
5619 #define elf_backend_can_gc_sections 1
5620 #define elf_backend_can_refcount 1
5621 #define elf_backend_want_got_plt 1
5622 #define elf_backend_plt_readonly 1
5623 #define elf_backend_want_plt_sym 0
5624 #define elf_backend_got_header_size 12
5625 #define elf_backend_plt_alignment 4
5626 #define elf_backend_dtrel_excludes_plt 1
5627 #define elf_backend_extern_protected_data 1
5628 #define elf_backend_caches_rawsize 1
5629 #define elf_backend_want_dynrelro 1
5631 /* Support RELA for objdump of prelink objects. */
5632 #define elf_info_to_howto elf_i386_info_to_howto_rel
5633 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5635 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5636 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5637 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5638 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5640 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5641 #define elf_backend_check_relocs elf_i386_check_relocs
5642 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5643 #define elf_backend_fake_sections elf_i386_fake_sections
5644 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5645 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5646 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
5647 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5648 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5649 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5650 #define elf_backend_relocate_section elf_i386_relocate_section
5651 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5652 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
5654 #include "elf32-target.h"
5656 /* FreeBSD support. */
5658 #undef TARGET_LITTLE_SYM
5659 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5660 #undef TARGET_LITTLE_NAME
5661 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5663 #define ELF_OSABI ELFOSABI_FREEBSD
5665 /* The kernel recognizes executables as valid only if they carry a
5666 "FreeBSD" label in the ELF header. So we put this label on all
5667 executables and (for simplicity) also all other object files. */
5670 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5672 _bfd_elf_post_process_headers (abfd, info);
5674 #ifdef OLD_FREEBSD_ABI_LABEL
5676 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5677 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5678 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5683 #undef elf_backend_post_process_headers
5684 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5686 #define elf32_bed elf32_i386_fbsd_bed
5688 #undef elf_backend_add_symbol_hook
5690 #include "elf32-target.h"
5694 #undef TARGET_LITTLE_SYM
5695 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5696 #undef TARGET_LITTLE_NAME
5697 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5699 #undef elf_backend_post_process_headers
5701 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5702 objects won't be recognized. */
5706 #define elf32_bed elf32_i386_sol2_bed
5708 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5710 #undef elf_backend_static_tls_alignment
5711 #define elf_backend_static_tls_alignment 8
5713 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5715 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5717 #undef elf_backend_want_plt_sym
5718 #define elf_backend_want_plt_sym 1
5720 #undef elf_backend_strtab_flags
5721 #define elf_backend_strtab_flags SHF_STRINGS
5723 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
5724 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5725 FALSE otherwise. ISECTION is the best guess matching section from the
5726 input bfd IBFD, but it might be NULL. */
5729 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
5730 bfd *obfd ATTRIBUTE_UNUSED,
5731 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
5732 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
5734 /* PR 19938: FIXME: Need to add code for setting the sh_info
5735 and sh_link fields of Solaris specific section types. */
5738 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
5739 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
5741 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
5743 The following values should be set:
5746 -----------------------------------------------------------------------------
5747 SHT_SUNW_ancillary The section header index of 0
5748 [0x6fffffee] the associated string table.
5750 SHT_SUNW_capinfo The section header index of For a dynamic object, the
5751 [0x6ffffff0] the associated symbol table. section header index of
5753 SHT_SUNW_capchain table,
5756 SHT_SUNW_symsort The section header index of 0
5757 [0x6ffffff1] the associated symbol table.
5759 SHT_SUNW_tlssort The section header index of 0
5760 [0x6ffffff2] the associated symbol table.
5762 SHT_SUNW_LDYNSYM The section header index of One greater than the
5763 [0x6ffffff3] the associated string table. symbol table index of the
5764 This index is the same string last local symbol,
5765 table used by the SHT_DYNSYM STB_LOCAL. Since
5766 section. SHT_SUNW_LDYNSYM only
5767 contains local symbols,
5768 sh_info is equivalent to
5769 the number of symbols in
5772 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
5773 [0x6ffffff5] the section header index of to named strings, the
5774 the associated section header index of
5775 SHT_SUNW_capinfo table, the associated string
5776 otherwise 0. table, otherwise 0.
5778 SHT_SUNW_move The section header index of 0
5779 [0x6ffffffa] the associated symbol table.
5784 SHT_SUNW_syminfo The section header index of The section header index
5785 [0x6ffffffc] the associated symbol table. of the associated
5788 SHT_SUNW_verdef The section header index of The number of version
5789 [0x6ffffffd] the associated string table. definitions within the
5792 SHT_SUNW_verneed The section header index of The number of version
5793 [0x6ffffffe] the associated string table. dependencies within the
5796 SHT_SUNW_versym The section header index of 0
5797 [0x6fffffff] the associated symbol table. */
5800 #undef elf_backend_copy_special_section_fields
5801 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
5803 #include "elf32-target.h"
5805 /* Intel MCU support. */
5808 elf32_iamcu_elf_object_p (bfd *abfd)
5810 /* Set the right machine number for an IAMCU elf32 file. */
5811 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5815 #undef TARGET_LITTLE_SYM
5816 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5817 #undef TARGET_LITTLE_NAME
5818 #define TARGET_LITTLE_NAME "elf32-iamcu"
5820 #define ELF_ARCH bfd_arch_iamcu
5822 #undef ELF_MACHINE_CODE
5823 #define ELF_MACHINE_CODE EM_IAMCU
5828 #define elf32_bed elf32_iamcu_bed
5830 #undef elf_backend_object_p
5831 #define elf_backend_object_p elf32_iamcu_elf_object_p
5833 #undef elf_backend_static_tls_alignment
5835 #undef elf_backend_want_plt_sym
5836 #define elf_backend_want_plt_sym 0
5838 #undef elf_backend_strtab_flags
5839 #undef elf_backend_copy_special_section_fields
5841 #include "elf32-target.h"
5843 /* Restore defaults. */
5845 #define ELF_ARCH bfd_arch_i386
5846 #undef ELF_MACHINE_CODE
5847 #define ELF_MACHINE_CODE EM_386
5849 /* Native Client support. */
5851 #undef TARGET_LITTLE_SYM
5852 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5853 #undef TARGET_LITTLE_NAME
5854 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5856 #define elf32_bed elf32_i386_nacl_bed
5858 #undef ELF_MAXPAGESIZE
5859 #define ELF_MAXPAGESIZE 0x10000
5861 /* Restore defaults. */
5863 #undef elf_backend_want_plt_sym
5864 #define elf_backend_want_plt_sym 0
5865 #undef elf_backend_post_process_headers
5866 #undef elf_backend_static_tls_alignment
5868 /* NaCl uses substantially different PLT entries for the same effects. */
5870 #undef elf_backend_plt_alignment
5871 #define elf_backend_plt_alignment 5
5872 #define NACL_PLT_ENTRY_SIZE 64
5873 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5875 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5877 0xff, 0x35, /* pushl contents of address */
5878 0, 0, 0, 0, /* replaced with address of .got + 4. */
5879 0x8b, 0x0d, /* movl contents of address, %ecx */
5880 0, 0, 0, 0, /* replaced with address of .got + 8. */
5881 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5882 0xff, 0xe1 /* jmp *%ecx */
5885 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5887 0x8b, 0x0d, /* movl contents of address, %ecx */
5888 0, 0, 0, 0, /* replaced with GOT slot address. */
5889 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5890 0xff, 0xe1, /* jmp *%ecx */
5892 /* Pad to the next 32-byte boundary with nop instructions. */
5894 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5895 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5897 /* Lazy GOT entries point here (32-byte aligned). */
5898 0x68, /* pushl immediate */
5899 0, 0, 0, 0, /* replaced with reloc offset. */
5900 0xe9, /* jmp relative */
5901 0, 0, 0, 0, /* replaced with offset to .plt. */
5903 /* Pad to the next 32-byte boundary with nop instructions. */
5904 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5905 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5909 static const bfd_byte
5910 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5912 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5913 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5914 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5915 0xff, 0xe1, /* jmp *%ecx */
5917 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5918 so pad to that size with nop instructions. */
5919 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5922 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5924 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5925 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5926 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5927 0xff, 0xe1, /* jmp *%ecx */
5929 /* Pad to the next 32-byte boundary with nop instructions. */
5931 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5932 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5934 /* Lazy GOT entries point here (32-byte aligned). */
5935 0x68, /* pushl immediate */
5936 0, 0, 0, 0, /* replaced with offset into relocation table. */
5937 0xe9, /* jmp relative */
5938 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5940 /* Pad to the next 32-byte boundary with nop instructions. */
5941 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5942 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5946 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5948 #if (PLT_CIE_LENGTH != 20 \
5949 || PLT_FDE_LENGTH != 36 \
5950 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5951 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5952 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5954 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5955 0, 0, 0, 0, /* CIE ID */
5956 1, /* CIE version */
5957 'z', 'R', 0, /* Augmentation string */
5958 1, /* Code alignment factor */
5959 0x7c, /* Data alignment factor: -4 */
5960 8, /* Return address column */
5961 1, /* Augmentation size */
5962 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5963 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5964 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5965 DW_CFA_nop, DW_CFA_nop,
5967 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5968 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5969 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5970 0, 0, 0, 0, /* .plt size goes here */
5971 0, /* Augmentation size */
5972 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5973 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5974 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5975 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5976 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5977 13, /* Block length */
5978 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5979 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5980 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5981 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5982 DW_CFA_nop, DW_CFA_nop
5985 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
5987 elf_i386_nacl_plt0_entry, /* plt0_entry */
5988 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5989 elf_i386_nacl_plt_entry, /* plt_entry */
5990 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5991 2, /* plt0_got1_offset */
5992 8, /* plt0_got2_offset */
5993 0, /* plt0_got2_insn_end */
5994 2, /* plt_got_offset */
5995 33, /* plt_reloc_offset */
5996 38, /* plt_plt_offset */
5997 0, /* plt_got_insn_size */
5998 0, /* plt_plt_insn_end */
5999 32, /* plt_lazy_offset */
6000 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6001 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6002 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
6003 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
6006 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6008 0x90, /* plt0_pad_byte: nop insn */
6013 elf32_i386_nacl_elf_object_p (bfd *abfd)
6015 /* Set the right machine number for a NaCl i386 ELF32 file. */
6016 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6020 #undef elf_backend_arch_data
6021 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6023 #undef elf_backend_object_p
6024 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6025 #undef elf_backend_modify_segment_map
6026 #define elf_backend_modify_segment_map nacl_modify_segment_map
6027 #undef elf_backend_modify_program_headers
6028 #define elf_backend_modify_program_headers nacl_modify_program_headers
6029 #undef elf_backend_final_write_processing
6030 #define elf_backend_final_write_processing nacl_final_write_processing
6032 #include "elf32-target.h"
6034 /* Restore defaults. */
6035 #undef elf_backend_object_p
6036 #undef elf_backend_modify_segment_map
6037 #undef elf_backend_modify_program_headers
6038 #undef elf_backend_final_write_processing
6040 /* VxWorks support. */
6042 #undef TARGET_LITTLE_SYM
6043 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6044 #undef TARGET_LITTLE_NAME
6045 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6047 #undef ELF_MAXPAGESIZE
6048 #define ELF_MAXPAGESIZE 0x1000
6049 #undef elf_backend_plt_alignment
6050 #define elf_backend_plt_alignment 4
6052 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6054 0x90, /* plt0_pad_byte */
6058 #undef elf_backend_arch_data
6059 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6061 #undef elf_backend_relocs_compatible
6062 #undef elf_backend_add_symbol_hook
6063 #define elf_backend_add_symbol_hook \
6064 elf_vxworks_add_symbol_hook
6065 #undef elf_backend_link_output_symbol_hook
6066 #define elf_backend_link_output_symbol_hook \
6067 elf_vxworks_link_output_symbol_hook
6068 #undef elf_backend_emit_relocs
6069 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6070 #undef elf_backend_final_write_processing
6071 #define elf_backend_final_write_processing \
6072 elf_vxworks_final_write_processing
6073 #undef elf_backend_static_tls_alignment
6075 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6077 #undef elf_backend_want_plt_sym
6078 #define elf_backend_want_plt_sym 1
6081 #define elf32_bed elf32_i386_vxworks_bed
6083 #include "elf32-target.h"