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 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
660 0, 0, 0, 0, /* CIE ID */
662 'z', 'R', 0, /* Augmentation string */
663 1, /* Code alignment factor */
664 0x7c, /* Data alignment factor */
665 8, /* Return address column */
666 1, /* Augmentation size */
667 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
668 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
669 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
670 DW_CFA_nop, DW_CFA_nop,
672 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
673 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
674 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
675 0, 0, 0, 0, /* .plt size goes here */
676 0, /* Augmentation size */
677 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
678 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
679 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
680 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
681 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
682 11, /* Block length */
683 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
684 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
685 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
686 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
687 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
690 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
692 static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
694 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
695 0, 0, 0, 0, /* CIE ID */
697 'z', 'R', 0, /* Augmentation string */
698 1, /* Code alignment factor */
699 0x7c, /* Data alignment factor */
700 8, /* Return address column */
701 1, /* Augmentation size */
702 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
703 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
704 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
705 DW_CFA_nop, DW_CFA_nop,
707 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
708 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
709 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
710 0, 0, 0, 0, /* .plt size goes here */
711 0, /* Augmentation size */
712 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
713 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
714 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
715 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
716 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
717 11, /* Block length */
718 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
719 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
720 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
721 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
722 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
725 /* .eh_frame covering the non-lazy .plt section. */
727 static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
729 #define PLT_GOT_FDE_LENGTH 16
730 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
731 0, 0, 0, 0, /* CIE ID */
733 'z', 'R', 0, /* Augmentation string */
734 1, /* Code alignment factor */
735 0x7c, /* Data alignment factor */
736 8, /* Return address column */
737 1, /* Augmentation size */
738 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
739 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
740 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
741 DW_CFA_nop, DW_CFA_nop,
743 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
744 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
745 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
746 0, 0, 0, 0, /* non-lazy .plt size goes here */
747 0, /* Augmentation size */
748 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
751 /* These are the standard parameters. */
752 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
754 elf_i386_lazy_plt0_entry, /* plt0_entry */
755 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
756 elf_i386_lazy_plt_entry, /* plt_entry */
757 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
758 2, /* plt0_got1_offset */
759 8, /* plt0_got2_offset */
760 0, /* plt0_got2_insn_end */
761 2, /* plt_got_offset */
762 7, /* plt_reloc_offset */
763 12, /* plt_plt_offset */
764 0, /* plt_got_insn_size */
765 0, /* plt_plt_insn_end */
766 6, /* plt_lazy_offset */
767 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
768 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
769 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
770 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
773 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
775 elf_i386_non_lazy_plt_entry, /* plt_entry */
776 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
777 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
778 2, /* plt_got_offset */
779 0, /* plt_got_insn_size */
780 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
781 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
784 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
786 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
787 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
788 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
789 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
790 2, /* plt0_got1_offset */
791 8, /* plt0_got2_offset */
792 0, /* plt0_got2_insn_end */
793 4+2, /* plt_got_offset */
794 4+1, /* plt_reloc_offset */
795 4+6, /* plt_plt_offset */
796 0, /* plt_got_insn_size */
797 0, /* plt_plt_insn_end */
798 0, /* plt_lazy_offset */
799 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
800 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
801 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
802 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
805 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
807 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
808 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
809 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
810 4+2, /* plt_got_offset */
811 0, /* plt_got_insn_size */
812 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
813 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
817 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
818 for the PLTResolve stub and then for each PLT entry. */
819 #define PLTRESOLVE_RELOCS_SHLIB 0
820 #define PLTRESOLVE_RELOCS 2
821 #define PLT_NON_JUMP_SLOT_RELOCS 2
823 /* Architecture-specific backend data for i386. */
825 struct elf_i386_backend_data
827 /* Value used to fill the unused bytes of the first PLT entry. */
828 bfd_byte plt0_pad_byte;
839 #define get_elf_i386_backend_data(abfd) \
840 ((const struct elf_i386_backend_data *) \
841 get_elf_backend_data (abfd)->arch_data)
843 /* These are the standard parameters. */
844 static const struct elf_i386_backend_data elf_i386_arch_bed =
846 0, /* plt0_pad_byte */
850 #define elf_backend_arch_data &elf_i386_arch_bed
852 /* Return TRUE if the TLS access code sequence support transition
856 elf_i386_check_tls_transition (asection *sec,
858 Elf_Internal_Shdr *symtab_hdr,
859 struct elf_link_hash_entry **sym_hashes,
861 const Elf_Internal_Rela *rel,
862 const Elf_Internal_Rela *relend)
864 unsigned int val, type, reg;
865 unsigned long r_symndx;
866 struct elf_link_hash_entry *h;
869 bfd_boolean indirect_call;
871 offset = rel->r_offset;
876 if (offset < 2 || (rel + 1) >= relend)
879 indirect_call = FALSE;
880 call = contents + offset + 4;
883 if (r_type == R_386_TLS_GD)
885 /* Check transition from GD access model. Only
886 leal foo@tlsgd(,%ebx,1), %eax
887 call ___tls_get_addr@PLT
889 leal foo@tlsgd(%ebx) %eax
890 call ___tls_get_addr@PLT
893 leal foo@tlsgd(%reg), %eax
894 call *___tls_get_addr@GOT(%reg)
895 which may be converted to
896 addr32 call ___tls_get_addr
897 can transit to different access model. */
898 if ((offset + 10) > sec->size
899 || (type != 0x8d && type != 0x04))
904 /* leal foo@tlsgd(,%ebx,1), %eax
905 call ___tls_get_addr@PLT */
909 if (*(call - 7) != 0x8d
917 leal foo@tlsgd(%ebx), %eax
918 call ___tls_get_addr@PLT
921 leal foo@tlsgd(%reg), %eax
922 call *___tls_get_addr@GOT(%reg)
923 which may be converted to
924 addr32 call ___tls_get_addr
926 %eax can't be used as the GOT base register since it
927 is used to pass parameter to ___tls_get_addr. */
929 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
932 indirect_call = call[0] == 0xff;
933 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
934 && !(call[0] == 0x67 && call[1] == 0xe8)
936 && (call[1] & 0xf8) == 0x90
937 && (call[1] & 0x7) == reg))
943 /* Check transition from LD access model. Only
944 leal foo@tlsldm(%ebx), %eax
945 call ___tls_get_addr@PLT
947 leal foo@tlsldm(%reg), %eax
948 call *___tls_get_addr@GOT(%reg)
949 which may be converted to
950 addr32 call ___tls_get_addr
951 can transit to different access model. */
952 if (type != 0x8d || (offset + 9) > sec->size)
955 /* %eax can't be used as the GOT base register since it is
956 used to pass parameter to ___tls_get_addr. */
958 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
961 indirect_call = call[0] == 0xff;
962 if (!(reg == 3 && call[0] == 0xe8)
963 && !(call[0] == 0x67 && call[1] == 0xe8)
965 && (call[1] & 0xf8) == 0x90
966 && (call[1] & 0x7) == reg))
970 r_symndx = ELF32_R_SYM (rel[1].r_info);
971 if (r_symndx < symtab_hdr->sh_info)
974 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
976 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
978 else if (indirect_call)
979 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
981 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
982 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
985 /* Check transition from IE access model:
986 movl foo@indntpoff(%rip), %eax
987 movl foo@indntpoff(%rip), %reg
988 addl foo@indntpoff(%rip), %reg
991 if (offset < 1 || (offset + 4) > sec->size)
994 /* Check "movl foo@tpoff(%rip), %eax" first. */
995 val = bfd_get_8 (abfd, contents + offset - 1);
1002 /* Check movl|addl foo@tpoff(%rip), %reg. */
1003 type = bfd_get_8 (abfd, contents + offset - 2);
1004 return ((type == 0x8b || type == 0x03)
1005 && (val & 0xc7) == 0x05);
1007 case R_386_TLS_GOTIE:
1008 case R_386_TLS_IE_32:
1009 /* Check transition from {IE_32,GOTIE} access model:
1010 subl foo@{tpoff,gontoff}(%reg1), %reg2
1011 movl foo@{tpoff,gontoff}(%reg1), %reg2
1012 addl foo@{tpoff,gontoff}(%reg1), %reg2
1015 if (offset < 2 || (offset + 4) > sec->size)
1018 val = bfd_get_8 (abfd, contents + offset - 1);
1019 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1022 type = bfd_get_8 (abfd, contents + offset - 2);
1023 return type == 0x8b || type == 0x2b || type == 0x03;
1025 case R_386_TLS_GOTDESC:
1026 /* Check transition from GDesc access model:
1027 leal x@tlsdesc(%ebx), %eax
1029 Make sure it's a leal adding ebx to a 32-bit offset
1030 into any register, although it's probably almost always
1033 if (offset < 2 || (offset + 4) > sec->size)
1036 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1039 val = bfd_get_8 (abfd, contents + offset - 1);
1040 return (val & 0xc7) == 0x83;
1042 case R_386_TLS_DESC_CALL:
1043 /* Check transition from GDesc access model:
1044 call *x@tlsdesc(%eax)
1046 if (offset + 2 <= sec->size)
1048 /* Make sure that it's a call *x@tlsdesc(%eax). */
1049 call = contents + offset;
1050 return call[0] == 0xff && call[1] == 0x10;
1060 /* Return TRUE if the TLS access transition is OK or no transition
1061 will be performed. Update R_TYPE if there is a transition. */
1064 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1065 asection *sec, bfd_byte *contents,
1066 Elf_Internal_Shdr *symtab_hdr,
1067 struct elf_link_hash_entry **sym_hashes,
1068 unsigned int *r_type, int tls_type,
1069 const Elf_Internal_Rela *rel,
1070 const Elf_Internal_Rela *relend,
1071 struct elf_link_hash_entry *h,
1072 unsigned long r_symndx,
1073 bfd_boolean from_relocate_section)
1075 unsigned int from_type = *r_type;
1076 unsigned int to_type = from_type;
1077 bfd_boolean check = TRUE;
1079 /* Skip TLS transition for functions. */
1081 && (h->type == STT_FUNC
1082 || h->type == STT_GNU_IFUNC))
1088 case R_386_TLS_GOTDESC:
1089 case R_386_TLS_DESC_CALL:
1090 case R_386_TLS_IE_32:
1092 case R_386_TLS_GOTIE:
1093 if (bfd_link_executable (info))
1096 to_type = R_386_TLS_LE_32;
1097 else if (from_type != R_386_TLS_IE
1098 && from_type != R_386_TLS_GOTIE)
1099 to_type = R_386_TLS_IE_32;
1102 /* When we are called from elf_i386_relocate_section, there may
1103 be additional transitions based on TLS_TYPE. */
1104 if (from_relocate_section)
1106 unsigned int new_to_type = to_type;
1108 if (bfd_link_executable (info)
1111 && (tls_type & GOT_TLS_IE))
1112 new_to_type = R_386_TLS_LE_32;
1114 if (to_type == R_386_TLS_GD
1115 || to_type == R_386_TLS_GOTDESC
1116 || to_type == R_386_TLS_DESC_CALL)
1118 if (tls_type == GOT_TLS_IE_POS)
1119 new_to_type = R_386_TLS_GOTIE;
1120 else if (tls_type & GOT_TLS_IE)
1121 new_to_type = R_386_TLS_IE_32;
1124 /* We checked the transition before when we were called from
1125 elf_i386_check_relocs. We only want to check the new
1126 transition which hasn't been checked before. */
1127 check = new_to_type != to_type && from_type == to_type;
1128 to_type = new_to_type;
1134 if (bfd_link_executable (info))
1135 to_type = R_386_TLS_LE_32;
1142 /* Return TRUE if there is no transition. */
1143 if (from_type == to_type)
1146 /* Check if the transition can be performed. */
1148 && ! elf_i386_check_tls_transition (sec, contents,
1149 symtab_hdr, sym_hashes,
1150 from_type, rel, relend))
1152 reloc_howto_type *from, *to;
1155 from = elf_i386_rtype_to_howto (abfd, from_type);
1156 to = elf_i386_rtype_to_howto (abfd, to_type);
1159 name = h->root.root.string;
1162 struct elf_x86_link_hash_table *htab;
1164 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1169 Elf_Internal_Sym *isym;
1171 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1173 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1178 /* xgettext:c-format */
1179 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1180 "in section `%A' failed"),
1181 abfd, from->name, to->name, name,
1182 rel->r_offset, sec);
1183 bfd_set_error (bfd_error_bad_value);
1191 /* With the local symbol, foo, we convert
1192 mov foo@GOT[(%reg1)], %reg2
1194 lea foo[@GOTOFF(%reg1)], %reg2
1196 call/jmp *foo@GOT[(%reg)]
1198 nop call foo/jmp foo nop
1199 When PIC is false, convert
1200 test %reg1, foo@GOT[(%reg2)]
1204 binop foo@GOT[(%reg1)], %reg2
1207 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1212 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1214 Elf_Internal_Rela *irel,
1215 struct elf_link_hash_entry *h,
1216 bfd_boolean *converted,
1217 struct bfd_link_info *link_info)
1219 struct elf_x86_link_hash_table *htab;
1220 unsigned int opcode;
1222 bfd_boolean baseless;
1223 Elf_Internal_Sym *isym;
1224 unsigned int addend;
1228 bfd_boolean to_reloc_32;
1229 unsigned int r_type;
1230 unsigned int r_symndx;
1231 bfd_vma roff = irel->r_offset;
1236 /* Addend for R_386_GOT32X relocations must be 0. */
1237 addend = bfd_get_32 (abfd, contents + roff);
1241 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
1242 is_pic = bfd_link_pic (link_info);
1244 r_type = ELF32_R_TYPE (irel->r_info);
1245 r_symndx = ELF32_R_SYM (irel->r_info);
1247 modrm = bfd_get_8 (abfd, contents + roff - 1);
1248 baseless = (modrm & 0xc7) == 0x5;
1250 if (baseless && is_pic)
1252 /* For PIC, disallow R_386_GOT32X without a base register
1253 since we don't know what the GOT base is. */
1258 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1260 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1263 name = h->root.root.string;
1266 /* xgettext:c-format */
1267 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1268 " register can not be used when making a shared object"),
1273 opcode = bfd_get_8 (abfd, contents + roff - 2);
1275 /* Convert to R_386_32 if PIC is false or there is no base
1277 to_reloc_32 = !is_pic || baseless;
1279 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1283 if (opcode == 0x0ff)
1284 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1285 goto convert_branch;
1287 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1288 "test %reg1, foo@GOT(%reg2)" and
1289 "binop foo@GOT[(%reg1)], %reg2". */
1293 /* Undefined weak symbol is only bound locally in executable
1294 and its reference is resolved as 0. */
1295 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, I386_ELF_DATA, TRUE,
1296 elf_x86_hash_entry (h)))
1300 /* No direct branch to 0 for PIC. */
1304 goto convert_branch;
1308 /* We can convert load of address 0 to R_386_32. */
1316 /* We have "call/jmp *foo@GOT[(%reg)]". */
1317 if ((h->root.type == bfd_link_hash_defined
1318 || h->root.type == bfd_link_hash_defweak)
1319 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1321 /* The function is locally defined. */
1323 /* Convert R_386_GOT32X to R_386_PC32. */
1324 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1326 struct elf_x86_link_hash_entry *eh
1327 = (struct elf_x86_link_hash_entry *) h;
1329 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1332 /* To support TLS optimization, always use addr32 prefix
1333 for "call *___tls_get_addr@GOT(%reg)". */
1334 if (eh && eh->tls_get_addr)
1337 nop_offset = irel->r_offset - 2;
1341 nop = link_info->call_nop_byte;
1342 if (link_info->call_nop_as_suffix)
1344 nop_offset = roff + 3;
1345 irel->r_offset -= 1;
1348 nop_offset = roff - 2;
1353 /* Convert to "jmp foo nop". */
1356 nop_offset = roff + 3;
1357 irel->r_offset -= 1;
1360 bfd_put_8 (abfd, nop, contents + nop_offset);
1361 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1362 /* When converting to PC-relative relocation, we
1363 need to adjust addend by -4. */
1364 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1365 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1372 /* We have "mov foo@GOT[(%re1g)], %reg2",
1373 "test %reg1, foo@GOT(%reg2)" and
1374 "binop foo@GOT[(%reg1)], %reg2".
1376 Avoid optimizing _DYNAMIC since ld.so may use its
1377 link-time address. */
1378 if (h == htab->elf.hdynamic)
1381 /* def_regular is set by an assignment in a linker script in
1382 bfd_elf_record_link_assignment. start_stop is set on
1383 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1386 || h->root.type == bfd_link_hash_defined
1387 || h->root.type == bfd_link_hash_defweak)
1388 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
1395 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1396 "mov $foo, %reg2" with R_386_32. */
1398 modrm = 0xc0 | (modrm & 0x38) >> 3;
1399 bfd_put_8 (abfd, modrm, contents + roff - 1);
1404 /* Convert "mov foo@GOT(%reg1), %reg2" to
1405 "lea foo@GOTOFF(%reg1), %reg2". */
1406 r_type = R_386_GOTOFF;
1412 /* Only R_386_32 is supported. */
1418 /* Convert "test %reg1, foo@GOT(%reg2)" to
1419 "test $foo, %reg1". */
1420 modrm = 0xc0 | (modrm & 0x38) >> 3;
1425 /* Convert "binop foo@GOT(%reg1), %reg2" to
1426 "binop $foo, %reg2". */
1428 | (modrm & 0x38) >> 3
1432 bfd_put_8 (abfd, modrm, contents + roff - 1);
1436 bfd_put_8 (abfd, opcode, contents + roff - 2);
1437 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1446 /* Rename some of the generic section flags to better document how they
1448 #define need_convert_load sec_flg0
1449 #define check_relocs_failed sec_flg1
1451 /* Look through the relocs for a section during the first phase, and
1452 calculate needed space in the global offset table, procedure linkage
1453 table, and dynamic reloc sections. */
1456 elf_i386_check_relocs (bfd *abfd,
1457 struct bfd_link_info *info,
1459 const Elf_Internal_Rela *relocs)
1461 struct elf_x86_link_hash_table *htab;
1462 Elf_Internal_Shdr *symtab_hdr;
1463 struct elf_link_hash_entry **sym_hashes;
1464 const Elf_Internal_Rela *rel;
1465 const Elf_Internal_Rela *rel_end;
1469 if (bfd_link_relocatable (info))
1472 /* Don't do anything special with non-loaded, non-alloced sections.
1473 In particular, any relocs in such sections should not affect GOT
1474 and PLT reference counting (ie. we don't allow them to create GOT
1475 or PLT entries), there's no possibility or desire to optimize TLS
1476 relocs, and there's not much point in propagating relocs to shared
1477 libs that the dynamic linker won't relocate. */
1478 if ((sec->flags & SEC_ALLOC) == 0)
1481 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1484 sec->check_relocs_failed = 1;
1488 BFD_ASSERT (is_x86_elf (abfd, htab));
1490 /* Get the section contents. */
1491 if (elf_section_data (sec)->this_hdr.contents != NULL)
1492 contents = elf_section_data (sec)->this_hdr.contents;
1493 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1495 sec->check_relocs_failed = 1;
1499 symtab_hdr = &elf_symtab_hdr (abfd);
1500 sym_hashes = elf_sym_hashes (abfd);
1504 rel_end = relocs + sec->reloc_count;
1505 for (rel = relocs; rel < rel_end; rel++)
1507 unsigned int r_type;
1508 unsigned int r_symndx;
1509 struct elf_link_hash_entry *h;
1510 struct elf_x86_link_hash_entry *eh;
1511 Elf_Internal_Sym *isym;
1513 bfd_boolean size_reloc;
1515 r_symndx = ELF32_R_SYM (rel->r_info);
1516 r_type = ELF32_R_TYPE (rel->r_info);
1518 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1520 /* xgettext:c-format */
1521 _bfd_error_handler (_("%B: bad symbol index: %d"),
1526 if (r_symndx < symtab_hdr->sh_info)
1528 /* A local symbol. */
1529 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1534 /* Check relocation against local STT_GNU_IFUNC symbol. */
1535 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1537 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
1541 /* Fake a STT_GNU_IFUNC symbol. */
1542 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1544 h->type = STT_GNU_IFUNC;
1547 h->forced_local = 1;
1548 h->root.type = bfd_link_hash_defined;
1556 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1557 while (h->root.type == bfd_link_hash_indirect
1558 || h->root.type == bfd_link_hash_warning)
1559 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1562 eh = (struct elf_x86_link_hash_entry *) h;
1565 if (r_type == R_386_GOTOFF)
1568 /* It is referenced by a non-shared object. */
1570 h->root.non_ir_ref_regular = 1;
1572 if (h->type == STT_GNU_IFUNC)
1573 elf_tdata (info->output_bfd)->has_gnu_symbols
1574 |= elf_gnu_symbol_ifunc;
1577 if (! elf_i386_tls_transition (info, abfd, sec, contents,
1578 symtab_hdr, sym_hashes,
1579 &r_type, GOT_UNKNOWN,
1580 rel, rel_end, h, r_symndx, FALSE))
1586 htab->tls_ld_or_ldm_got.refcount += 1;
1590 /* This symbol requires a procedure linkage table entry. We
1591 actually build the entry in adjust_dynamic_symbol,
1592 because this might be a case of linking PIC code which is
1593 never referenced by a dynamic object, in which case we
1594 don't need to generate a procedure linkage table entry
1597 /* If this is a local symbol, we resolve it directly without
1598 creating a procedure linkage table entry. */
1602 eh->has_got_reloc = 1;
1604 h->plt.refcount += 1;
1611 case R_386_TLS_IE_32:
1613 case R_386_TLS_GOTIE:
1614 if (!bfd_link_executable (info))
1615 info->flags |= DF_STATIC_TLS;
1621 case R_386_TLS_GOTDESC:
1622 case R_386_TLS_DESC_CALL:
1623 /* This symbol requires a global offset table entry. */
1625 int tls_type, old_tls_type;
1632 tls_type = GOT_NORMAL;
1634 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1635 case R_386_TLS_GOTDESC:
1636 case R_386_TLS_DESC_CALL:
1637 tls_type = GOT_TLS_GDESC; break;
1638 case R_386_TLS_IE_32:
1639 if (ELF32_R_TYPE (rel->r_info) == r_type)
1640 tls_type = GOT_TLS_IE_NEG;
1642 /* If this is a GD->IE transition, we may use either of
1643 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1644 tls_type = GOT_TLS_IE;
1647 case R_386_TLS_GOTIE:
1648 tls_type = GOT_TLS_IE_POS; break;
1653 h->got.refcount += 1;
1654 old_tls_type = elf_x86_hash_entry (h)->tls_type;
1658 bfd_signed_vma *local_got_refcounts;
1660 /* This is a global offset table entry for a local symbol. */
1661 local_got_refcounts = elf_local_got_refcounts (abfd);
1662 if (local_got_refcounts == NULL)
1666 size = symtab_hdr->sh_info;
1667 size *= (sizeof (bfd_signed_vma)
1668 + sizeof (bfd_vma) + sizeof(char));
1669 local_got_refcounts = (bfd_signed_vma *)
1670 bfd_zalloc (abfd, size);
1671 if (local_got_refcounts == NULL)
1673 elf_local_got_refcounts (abfd) = local_got_refcounts;
1674 elf_x86_local_tlsdesc_gotent (abfd)
1675 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1676 elf_x86_local_got_tls_type (abfd)
1677 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1679 local_got_refcounts[r_symndx] += 1;
1680 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
1683 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1684 tls_type |= old_tls_type;
1685 /* If a TLS symbol is accessed using IE at least once,
1686 there is no point to use dynamic model for it. */
1687 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1688 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1689 || (tls_type & GOT_TLS_IE) == 0))
1691 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1692 tls_type = old_tls_type;
1693 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1694 && GOT_TLS_GD_ANY_P (tls_type))
1695 tls_type |= old_tls_type;
1699 name = h->root.root.string;
1701 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1704 /* xgettext:c-format */
1705 (_("%B: `%s' accessed both as normal and "
1706 "thread local symbol"),
1708 bfd_set_error (bfd_error_bad_value);
1713 if (old_tls_type != tls_type)
1716 elf_x86_hash_entry (h)->tls_type = tls_type;
1718 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
1726 if (r_type != R_386_TLS_IE)
1729 eh->has_got_reloc = 1;
1734 case R_386_TLS_LE_32:
1737 eh->has_got_reloc = 1;
1738 if (bfd_link_executable (info))
1740 info->flags |= DF_STATIC_TLS;
1745 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1746 eh->has_non_got_reloc = 1;
1748 /* We are called after all symbols have been resolved. Only
1749 relocation against STT_GNU_IFUNC symbol must go through
1752 && (bfd_link_executable (info)
1753 || h->type == STT_GNU_IFUNC))
1755 /* If this reloc is in a read-only section, we might
1756 need a copy reloc. We can't check reliably at this
1757 stage whether the section is read-only, as input
1758 sections have not yet been mapped to output sections.
1759 Tentatively set the flag for now, and correct in
1760 adjust_dynamic_symbol. */
1763 /* We may need a .plt entry if the symbol is a function
1764 defined in a shared lib or is a STT_GNU_IFUNC function
1765 referenced from the code or read-only section. */
1767 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1768 h->plt.refcount += 1;
1770 if (r_type == R_386_PC32)
1772 /* Since something like ".long foo - ." may be used
1773 as pointer, make sure that PLT is used if foo is
1774 a function defined in a shared library. */
1775 if ((sec->flags & SEC_CODE) == 0)
1776 h->pointer_equality_needed = 1;
1777 else if (h->type == STT_GNU_IFUNC
1778 && bfd_link_pic (info))
1781 /* xgettext:c-format */
1782 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
1783 abfd, h->root.root.string);
1784 bfd_set_error (bfd_error_bad_value);
1790 h->pointer_equality_needed = 1;
1791 /* R_386_32 can be resolved at run-time. */
1792 if (r_type == R_386_32
1793 && (sec->flags & SEC_READONLY) == 0)
1794 eh->func_pointer_refcount += 1;
1800 /* If we are creating a shared library, and this is a reloc
1801 against a global symbol, or a non PC relative reloc
1802 against a local symbol, then we need to copy the reloc
1803 into the shared library. However, if we are linking with
1804 -Bsymbolic, we do not need to copy a reloc against a
1805 global symbol which is defined in an object we are
1806 including in the link (i.e., DEF_REGULAR is set). At
1807 this point we have not seen all the input files, so it is
1808 possible that DEF_REGULAR is not set now but will be set
1809 later (it is never cleared). In case of a weak definition,
1810 DEF_REGULAR may be cleared later by a strong definition in
1811 a shared library. We account for that possibility below by
1812 storing information in the relocs_copied field of the hash
1813 table entry. A similar situation occurs when creating
1814 shared libraries and symbol visibility changes render the
1817 If on the other hand, we are creating an executable, we
1818 may need to keep relocations for symbols satisfied by a
1819 dynamic library if we manage to avoid copy relocs for the
1822 Generate dynamic pointer relocation against STT_GNU_IFUNC
1823 symbol in the non-code section. */
1824 if ((bfd_link_pic (info)
1825 && (r_type != R_386_PC32
1827 && (! (bfd_link_pie (info)
1828 || SYMBOLIC_BIND (info, h))
1829 || h->root.type == bfd_link_hash_defweak
1830 || !h->def_regular))))
1832 && h->type == STT_GNU_IFUNC
1833 && r_type == R_386_32
1834 && (sec->flags & SEC_CODE) == 0)
1835 || (ELIMINATE_COPY_RELOCS
1836 && !bfd_link_pic (info)
1838 && (h->root.type == bfd_link_hash_defweak
1839 || !h->def_regular)))
1841 struct elf_dyn_relocs *p;
1842 struct elf_dyn_relocs **head;
1844 /* We must copy these reloc types into the output file.
1845 Create a reloc section in dynobj and make room for
1849 sreloc = _bfd_elf_make_dynamic_reloc_section
1850 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1856 /* If this is a global symbol, we count the number of
1857 relocations we need for this symbol. */
1860 head = &eh->dyn_relocs;
1864 /* Track dynamic relocs needed for local syms too.
1865 We really need local syms available to do this
1870 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1875 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1879 vpp = &elf_section_data (s)->local_dynrel;
1880 head = (struct elf_dyn_relocs **)vpp;
1884 if (p == NULL || p->sec != sec)
1886 bfd_size_type amt = sizeof *p;
1887 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1899 /* Count size relocation as PC-relative relocation. */
1900 if (r_type == R_386_PC32 || size_reloc)
1905 /* This relocation describes the C++ object vtable hierarchy.
1906 Reconstruct it for later use during GC. */
1907 case R_386_GNU_VTINHERIT:
1908 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1912 /* This relocation describes which C++ vtable entries are actually
1913 used. Record for later use during GC. */
1914 case R_386_GNU_VTENTRY:
1915 BFD_ASSERT (h != NULL);
1917 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1925 if (r_type == R_386_GOT32X
1926 && (h == NULL || h->type != STT_GNU_IFUNC))
1927 sec->need_convert_load = 1;
1930 if (elf_section_data (sec)->this_hdr.contents != contents)
1932 if (!info->keep_memory)
1936 /* Cache the section contents for elf_link_input_bfd. */
1937 elf_section_data (sec)->this_hdr.contents = contents;
1944 if (elf_section_data (sec)->this_hdr.contents != contents)
1946 sec->check_relocs_failed = 1;
1950 /* Convert load via the GOT slot to load immediate. */
1953 elf_i386_convert_load (bfd *abfd, asection *sec,
1954 struct bfd_link_info *link_info)
1956 struct elf_x86_link_hash_table *htab;
1957 Elf_Internal_Shdr *symtab_hdr;
1958 Elf_Internal_Rela *internal_relocs;
1959 Elf_Internal_Rela *irel, *irelend;
1961 bfd_boolean changed;
1962 bfd_signed_vma *local_got_refcounts;
1964 /* Don't even try to convert non-ELF outputs. */
1965 if (!is_elf_hash_table (link_info->hash))
1968 /* Nothing to do if there is no need or no output. */
1969 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
1970 || sec->need_convert_load == 0
1971 || bfd_is_abs_section (sec->output_section))
1974 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1976 /* Load the relocations for this section. */
1977 internal_relocs = (_bfd_elf_link_read_relocs
1978 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
1979 link_info->keep_memory));
1980 if (internal_relocs == NULL)
1984 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
1985 local_got_refcounts = elf_local_got_refcounts (abfd);
1987 /* Get the section contents. */
1988 if (elf_section_data (sec)->this_hdr.contents != NULL)
1989 contents = elf_section_data (sec)->this_hdr.contents;
1992 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1996 irelend = internal_relocs + sec->reloc_count;
1997 for (irel = internal_relocs; irel < irelend; irel++)
1999 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2000 unsigned int r_symndx;
2001 struct elf_link_hash_entry *h;
2002 bfd_boolean converted;
2004 /* Don't convert R_386_GOT32 since we can't tell if it is applied
2005 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
2006 if (r_type != R_386_GOT32X)
2009 r_symndx = ELF32_R_SYM (irel->r_info);
2010 if (r_symndx < symtab_hdr->sh_info)
2011 h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
2012 (const Elf_Internal_Rela *) irel,
2016 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
2017 while (h->root.type == bfd_link_hash_indirect
2018 || h->root.type == bfd_link_hash_warning)
2019 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2022 /* STT_GNU_IFUNC must keep GOT32 relocations. */
2023 if (h != NULL && h->type == STT_GNU_IFUNC)
2027 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
2028 irel, h, &converted, link_info))
2033 changed = converted;
2036 if (h->got.refcount > 0)
2037 h->got.refcount -= 1;
2041 if (local_got_refcounts != NULL
2042 && local_got_refcounts[r_symndx] > 0)
2043 local_got_refcounts[r_symndx] -= 1;
2048 if (contents != NULL
2049 && elf_section_data (sec)->this_hdr.contents != contents)
2051 if (!changed && !link_info->keep_memory)
2055 /* Cache the section contents for elf_link_input_bfd. */
2056 elf_section_data (sec)->this_hdr.contents = contents;
2060 if (elf_section_data (sec)->relocs != internal_relocs)
2063 free (internal_relocs);
2065 elf_section_data (sec)->relocs = internal_relocs;
2071 if (contents != NULL
2072 && elf_section_data (sec)->this_hdr.contents != contents)
2074 if (internal_relocs != NULL
2075 && elf_section_data (sec)->relocs != internal_relocs)
2076 free (internal_relocs);
2080 /* Set the sizes of the dynamic sections. */
2083 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2085 struct elf_x86_link_hash_table *htab;
2091 htab = elf_x86_hash_table (info, I386_ELF_DATA);
2094 dynobj = htab->elf.dynobj;
2098 /* Set up .got offsets for local syms, and space for local dynamic
2100 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2102 bfd_signed_vma *local_got;
2103 bfd_signed_vma *end_local_got;
2104 char *local_tls_type;
2105 bfd_vma *local_tlsdesc_gotent;
2106 bfd_size_type locsymcount;
2107 Elf_Internal_Shdr *symtab_hdr;
2110 if (! is_x86_elf (ibfd, htab))
2113 for (s = ibfd->sections; s != NULL; s = s->next)
2115 struct elf_dyn_relocs *p;
2117 if (!elf_i386_convert_load (ibfd, s, info))
2120 for (p = ((struct elf_dyn_relocs *)
2121 elf_section_data (s)->local_dynrel);
2125 if (!bfd_is_abs_section (p->sec)
2126 && bfd_is_abs_section (p->sec->output_section))
2128 /* Input section has been discarded, either because
2129 it is a copy of a linkonce section or due to
2130 linker script /DISCARD/, so we'll be discarding
2133 else if (htab->is_vxworks
2134 && strcmp (p->sec->output_section->name,
2137 /* Relocations in vxworks .tls_vars sections are
2138 handled specially by the loader. */
2140 else if (p->count != 0)
2142 srel = elf_section_data (p->sec)->sreloc;
2143 srel->size += p->count * sizeof (Elf32_External_Rel);
2144 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2145 && (info->flags & DF_TEXTREL) == 0)
2147 info->flags |= DF_TEXTREL;
2148 if ((info->warn_shared_textrel && bfd_link_pic (info))
2149 || info->error_textrel)
2150 /* xgettext:c-format */
2151 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2152 p->sec->owner, p->sec);
2158 local_got = elf_local_got_refcounts (ibfd);
2162 symtab_hdr = &elf_symtab_hdr (ibfd);
2163 locsymcount = symtab_hdr->sh_info;
2164 end_local_got = local_got + locsymcount;
2165 local_tls_type = elf_x86_local_got_tls_type (ibfd);
2166 local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd);
2168 srel = htab->elf.srelgot;
2169 for (; local_got < end_local_got;
2170 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2172 *local_tlsdesc_gotent = (bfd_vma) -1;
2175 if (GOT_TLS_GDESC_P (*local_tls_type))
2177 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2178 - elf_x86_compute_jump_table_size (htab);
2179 htab->elf.sgotplt->size += 8;
2180 *local_got = (bfd_vma) -2;
2182 if (! GOT_TLS_GDESC_P (*local_tls_type)
2183 || GOT_TLS_GD_P (*local_tls_type))
2185 *local_got = s->size;
2187 if (GOT_TLS_GD_P (*local_tls_type)
2188 || *local_tls_type == GOT_TLS_IE_BOTH)
2191 if (bfd_link_pic (info)
2192 || GOT_TLS_GD_ANY_P (*local_tls_type)
2193 || (*local_tls_type & GOT_TLS_IE))
2195 if (*local_tls_type == GOT_TLS_IE_BOTH)
2196 srel->size += 2 * sizeof (Elf32_External_Rel);
2197 else if (GOT_TLS_GD_P (*local_tls_type)
2198 || ! GOT_TLS_GDESC_P (*local_tls_type))
2199 srel->size += sizeof (Elf32_External_Rel);
2200 if (GOT_TLS_GDESC_P (*local_tls_type))
2201 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2205 *local_got = (bfd_vma) -1;
2209 if (htab->tls_ld_or_ldm_got.refcount > 0)
2211 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2213 htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size;
2214 htab->elf.sgot->size += 8;
2215 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2218 htab->tls_ld_or_ldm_got.offset = -1;
2220 /* Allocate global sym .plt and .got entries, and space for global
2221 sym dynamic relocs. */
2222 elf_link_hash_traverse (&htab->elf, _bfd_x86_elf_allocate_dynrelocs,
2225 /* Allocate .plt and .got entries, and space for local symbols. */
2226 htab_traverse (htab->loc_hash_table,
2227 _bfd_x86_elf_allocate_local_dynrelocs,
2230 /* For every jump slot reserved in the sgotplt, reloc_count is
2231 incremented. However, when we reserve space for TLS descriptors,
2232 it's not incremented, so in order to compute the space reserved
2233 for them, it suffices to multiply the reloc count by the jump
2236 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2237 so that R_386_IRELATIVE entries come last. */
2238 if (htab->elf.srelplt)
2240 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2241 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2242 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2244 else if (htab->elf.irelplt)
2245 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2248 if (htab->elf.sgotplt)
2250 /* Don't allocate .got.plt section if there are no GOT nor PLT
2251 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2252 if ((htab->elf.hgot == NULL
2253 || !htab->elf.hgot->ref_regular_nonweak)
2254 && (htab->elf.sgotplt->size
2255 == get_elf_backend_data (output_bfd)->got_header_size)
2256 && (htab->elf.splt == NULL
2257 || htab->elf.splt->size == 0)
2258 && (htab->elf.sgot == NULL
2259 || htab->elf.sgot->size == 0)
2260 && (htab->elf.iplt == NULL
2261 || htab->elf.iplt->size == 0)
2262 && (htab->elf.igotplt == NULL
2263 || htab->elf.igotplt->size == 0))
2264 htab->elf.sgotplt->size = 0;
2267 if (_bfd_elf_eh_frame_present (info))
2269 if (htab->plt_eh_frame != NULL
2270 && htab->elf.splt != NULL
2271 && htab->elf.splt->size != 0
2272 && !bfd_is_abs_section (htab->elf.splt->output_section))
2273 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
2275 if (htab->plt_got_eh_frame != NULL
2276 && htab->plt_got != NULL
2277 && htab->plt_got->size != 0
2278 && !bfd_is_abs_section (htab->plt_got->output_section))
2279 htab->plt_got_eh_frame->size
2280 = htab->non_lazy_plt->eh_frame_plt_size;
2282 /* Unwind info for the second PLT and .plt.got sections are
2284 if (htab->plt_second_eh_frame != NULL
2285 && htab->plt_second != NULL
2286 && htab->plt_second->size != 0
2287 && !bfd_is_abs_section (htab->plt_second->output_section))
2288 htab->plt_second_eh_frame->size
2289 = htab->non_lazy_plt->eh_frame_plt_size;
2292 /* We now have determined the sizes of the various dynamic sections.
2293 Allocate memory for them. */
2295 for (s = dynobj->sections; s != NULL; s = s->next)
2297 bfd_boolean strip_section = TRUE;
2299 if ((s->flags & SEC_LINKER_CREATED) == 0)
2302 if (s == htab->elf.splt
2303 || s == htab->elf.sgot)
2305 /* Strip this section if we don't need it; see the
2307 /* We'd like to strip these sections if they aren't needed, but if
2308 we've exported dynamic symbols from them we must leave them.
2309 It's too late to tell BFD to get rid of the symbols. */
2311 if (htab->elf.hplt != NULL)
2312 strip_section = FALSE;
2314 else if (s == htab->elf.sgotplt
2315 || s == htab->elf.iplt
2316 || s == htab->elf.igotplt
2317 || s == htab->plt_second
2318 || s == htab->plt_got
2319 || s == htab->plt_eh_frame
2320 || s == htab->plt_got_eh_frame
2321 || s == htab->plt_second_eh_frame
2322 || s == htab->elf.sdynbss
2323 || s == htab->elf.sdynrelro)
2325 /* Strip these too. */
2327 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2330 && s != htab->elf.srelplt
2331 && s != htab->srelplt2)
2334 /* We use the reloc_count field as a counter if we need
2335 to copy relocs into the output file. */
2340 /* It's not one of our sections, so don't allocate space. */
2346 /* If we don't need this section, strip it from the
2347 output file. This is mostly to handle .rel.bss and
2348 .rel.plt. We must create both sections in
2349 create_dynamic_sections, because they must be created
2350 before the linker maps input sections to output
2351 sections. The linker does that before
2352 adjust_dynamic_symbol is called, and it is that
2353 function which decides whether anything needs to go
2354 into these sections. */
2356 s->flags |= SEC_EXCLUDE;
2360 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2363 /* Allocate memory for the section contents. We use bfd_zalloc
2364 here in case unused entries are not reclaimed before the
2365 section's contents are written out. This should not happen,
2366 but this way if it does, we get a R_386_NONE reloc instead
2368 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2369 if (s->contents == NULL)
2373 if (htab->plt_eh_frame != NULL
2374 && htab->plt_eh_frame->contents != NULL)
2376 memcpy (htab->plt_eh_frame->contents,
2377 htab->plt.eh_frame_plt,
2378 htab->plt_eh_frame->size);
2379 bfd_put_32 (dynobj, htab->elf.splt->size,
2380 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2383 if (htab->plt_got_eh_frame != NULL
2384 && htab->plt_got_eh_frame->contents != NULL)
2386 memcpy (htab->plt_got_eh_frame->contents,
2387 htab->non_lazy_plt->eh_frame_plt,
2388 htab->plt_got_eh_frame->size);
2389 bfd_put_32 (dynobj, htab->plt_got->size,
2390 (htab->plt_got_eh_frame->contents
2391 + PLT_FDE_LEN_OFFSET));
2394 if (htab->plt_second_eh_frame != NULL
2395 && htab->plt_second_eh_frame->contents != NULL)
2397 memcpy (htab->plt_second_eh_frame->contents,
2398 htab->non_lazy_plt->eh_frame_plt,
2399 htab->plt_second_eh_frame->size);
2400 bfd_put_32 (dynobj, htab->plt_second->size,
2401 (htab->plt_second_eh_frame->contents
2402 + PLT_FDE_LEN_OFFSET));
2405 if (htab->elf.dynamic_sections_created)
2407 /* Add some entries to the .dynamic section. We fill in the
2408 values later, in elf_i386_finish_dynamic_sections, but we
2409 must add the entries now so that we get the correct size for
2410 the .dynamic section. The DT_DEBUG entry is filled in by the
2411 dynamic linker and used by the debugger. */
2412 #define add_dynamic_entry(TAG, VAL) \
2413 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2415 if (bfd_link_executable (info))
2417 if (!add_dynamic_entry (DT_DEBUG, 0))
2421 if (htab->elf.splt->size != 0)
2423 /* DT_PLTGOT is used by prelink even if there is no PLT
2425 if (!add_dynamic_entry (DT_PLTGOT, 0))
2429 if (htab->elf.srelplt->size != 0)
2431 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2432 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2433 || !add_dynamic_entry (DT_JMPREL, 0))
2439 if (!add_dynamic_entry (DT_REL, 0)
2440 || !add_dynamic_entry (DT_RELSZ, 0)
2441 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2444 /* If any dynamic relocs apply to a read-only section,
2445 then we need a DT_TEXTREL entry. */
2446 if ((info->flags & DF_TEXTREL) == 0)
2447 elf_link_hash_traverse (&htab->elf,
2448 _bfd_x86_elf_readonly_dynrelocs,
2451 if ((info->flags & DF_TEXTREL) != 0)
2453 if (htab->readonly_dynrelocs_against_ifunc)
2455 info->callbacks->einfo
2456 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
2457 bfd_set_error (bfd_error_bad_value);
2461 if (!add_dynamic_entry (DT_TEXTREL, 0))
2465 if (htab->is_vxworks
2466 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2469 #undef add_dynamic_entry
2474 /* Set the correct type for an x86 ELF section. We do this by the
2475 section name, which is a hack, but ought to work. */
2478 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2479 Elf_Internal_Shdr *hdr,
2484 name = bfd_get_section_name (abfd, sec);
2486 /* This is an ugly, but unfortunately necessary hack that is
2487 needed when producing EFI binaries on x86. It tells
2488 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2489 containing ELF relocation info. We need this hack in order to
2490 be able to generate ELF binaries that can be translated into
2491 EFI applications (which are essentially COFF objects). Those
2492 files contain a COFF ".reloc" section inside an ELFNN object,
2493 which would normally cause BFD to segfault because it would
2494 attempt to interpret this section as containing relocation
2495 entries for section "oc". With this hack enabled, ".reloc"
2496 will be treated as a normal data section, which will avoid the
2497 segfault. However, you won't be able to create an ELFNN binary
2498 with a section named "oc" that needs relocations, but that's
2499 the kind of ugly side-effects you get when detecting section
2500 types based on their names... In practice, this limitation is
2501 unlikely to bite. */
2502 if (strcmp (name, ".reloc") == 0)
2503 hdr->sh_type = SHT_PROGBITS;
2508 /* Return the relocation value for @tpoff relocation
2509 if STT_TLS virtual address is ADDRESS. */
2512 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2514 struct elf_link_hash_table *htab = elf_hash_table (info);
2515 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2516 bfd_vma static_tls_size;
2518 /* If tls_sec is NULL, we should have signalled an error already. */
2519 if (htab->tls_sec == NULL)
2522 /* Consider special static TLS alignment requirements. */
2523 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2524 return static_tls_size + htab->tls_sec->vma - address;
2527 /* Relocate an i386 ELF section. */
2530 elf_i386_relocate_section (bfd *output_bfd,
2531 struct bfd_link_info *info,
2533 asection *input_section,
2535 Elf_Internal_Rela *relocs,
2536 Elf_Internal_Sym *local_syms,
2537 asection **local_sections)
2539 struct elf_x86_link_hash_table *htab;
2540 Elf_Internal_Shdr *symtab_hdr;
2541 struct elf_link_hash_entry **sym_hashes;
2542 bfd_vma *local_got_offsets;
2543 bfd_vma *local_tlsdesc_gotents;
2544 Elf_Internal_Rela *rel;
2545 Elf_Internal_Rela *wrel;
2546 Elf_Internal_Rela *relend;
2547 bfd_boolean is_vxworks_tls;
2548 unsigned plt_entry_size;
2550 /* Skip if check_relocs failed. */
2551 if (input_section->check_relocs_failed)
2554 htab = elf_x86_hash_table (info, I386_ELF_DATA);
2558 BFD_ASSERT (is_x86_elf (input_bfd, htab));
2560 symtab_hdr = &elf_symtab_hdr (input_bfd);
2561 sym_hashes = elf_sym_hashes (input_bfd);
2562 local_got_offsets = elf_local_got_offsets (input_bfd);
2563 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
2564 /* We have to handle relocations in vxworks .tls_vars sections
2565 specially, because the dynamic loader is 'weird'. */
2566 is_vxworks_tls = (htab->is_vxworks
2567 && bfd_link_pic (info)
2568 && !strcmp (input_section->output_section->name,
2571 _bfd_x86_elf_set_tls_module_base (info);
2573 plt_entry_size = htab->plt.plt_entry_size;
2575 rel = wrel = relocs;
2576 relend = relocs + input_section->reloc_count;
2577 for (; rel < relend; wrel++, rel++)
2579 unsigned int r_type;
2580 reloc_howto_type *howto;
2581 unsigned long r_symndx;
2582 struct elf_link_hash_entry *h;
2583 struct elf_x86_link_hash_entry *eh;
2584 Elf_Internal_Sym *sym;
2586 bfd_vma off, offplt, plt_offset;
2588 bfd_boolean unresolved_reloc;
2589 bfd_reloc_status_type r;
2593 asection *resolved_plt;
2594 bfd_boolean resolved_to_zero;
2595 bfd_boolean relative_reloc;
2597 r_type = ELF32_R_TYPE (rel->r_info);
2598 if (r_type == R_386_GNU_VTINHERIT
2599 || r_type == R_386_GNU_VTENTRY)
2606 if ((indx = r_type) >= R_386_standard
2607 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2608 >= R_386_ext - R_386_standard)
2609 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2610 >= R_386_ext2 - R_386_ext))
2611 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2613 howto = elf_howto_table + indx;
2615 r_symndx = ELF32_R_SYM (rel->r_info);
2619 unresolved_reloc = FALSE;
2620 if (r_symndx < symtab_hdr->sh_info)
2622 sym = local_syms + r_symndx;
2623 sec = local_sections[r_symndx];
2624 relocation = (sec->output_section->vma
2625 + sec->output_offset
2627 st_size = sym->st_size;
2629 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2630 && ((sec->flags & SEC_MERGE) != 0
2631 || (bfd_link_relocatable (info)
2632 && sec->output_offset != 0)))
2635 bfd_byte *where = contents + rel->r_offset;
2637 switch (howto->size)
2640 addend = bfd_get_8 (input_bfd, where);
2641 if (howto->pc_relative)
2643 addend = (addend ^ 0x80) - 0x80;
2648 addend = bfd_get_16 (input_bfd, where);
2649 if (howto->pc_relative)
2651 addend = (addend ^ 0x8000) - 0x8000;
2656 addend = bfd_get_32 (input_bfd, where);
2657 if (howto->pc_relative)
2659 addend = (addend ^ 0x80000000) - 0x80000000;
2667 if (bfd_link_relocatable (info))
2668 addend += sec->output_offset;
2671 asection *msec = sec;
2672 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2674 addend -= relocation;
2675 addend += msec->output_section->vma + msec->output_offset;
2678 switch (howto->size)
2681 /* FIXME: overflow checks. */
2682 if (howto->pc_relative)
2684 bfd_put_8 (input_bfd, addend, where);
2687 if (howto->pc_relative)
2689 bfd_put_16 (input_bfd, addend, where);
2692 if (howto->pc_relative)
2694 bfd_put_32 (input_bfd, addend, where);
2698 else if (!bfd_link_relocatable (info)
2699 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2701 /* Relocate against local STT_GNU_IFUNC symbol. */
2702 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
2707 /* Set STT_GNU_IFUNC symbol value. */
2708 h->root.u.def.value = sym->st_value;
2709 h->root.u.def.section = sec;
2714 bfd_boolean warned ATTRIBUTE_UNUSED;
2715 bfd_boolean ignored ATTRIBUTE_UNUSED;
2717 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2718 r_symndx, symtab_hdr, sym_hashes,
2720 unresolved_reloc, warned, ignored);
2724 if (sec != NULL && discarded_section (sec))
2726 _bfd_clear_contents (howto, input_bfd, input_section,
2727 contents + rel->r_offset);
2728 wrel->r_offset = rel->r_offset;
2732 /* For ld -r, remove relocations in debug sections against
2733 sections defined in discarded sections. Not done for
2734 eh_frame editing code expects to be present. */
2735 if (bfd_link_relocatable (info)
2736 && (input_section->flags & SEC_DEBUGGING))
2742 if (bfd_link_relocatable (info))
2749 eh = (struct elf_x86_link_hash_entry *) h;
2751 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2752 it here if it is defined in a non-shared object. */
2754 && h->type == STT_GNU_IFUNC
2757 asection *gotplt, *base_got;
2761 if ((input_section->flags & SEC_ALLOC) == 0)
2763 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2764 sections because such sections are not SEC_ALLOC and
2765 thus ld.so will not process them. */
2766 if ((input_section->flags & SEC_DEBUGGING) != 0)
2771 /* STT_GNU_IFUNC symbol must go through PLT. */
2772 if (htab->elf.splt != NULL)
2774 if (htab->plt_second != NULL)
2776 resolved_plt = htab->plt_second;
2777 plt_offset = eh->plt_second.offset;
2781 resolved_plt = htab->elf.splt;
2782 plt_offset = h->plt.offset;
2784 gotplt = htab->elf.sgotplt;
2788 resolved_plt = htab->elf.iplt;
2789 plt_offset = h->plt.offset;
2790 gotplt = htab->elf.igotplt;
2800 base_got = htab->elf.sgot;
2801 off = h->got.offset;
2803 if (base_got == NULL)
2806 if (off == (bfd_vma) -1)
2808 /* We can't use h->got.offset here to save state, or
2809 even just remember the offset, as finish_dynamic_symbol
2810 would use that as offset into .got. */
2812 if (h->plt.offset == (bfd_vma) -1)
2815 if (htab->elf.splt != NULL)
2817 plt_index = (h->plt.offset / plt_entry_size
2818 - htab->plt.has_plt0);
2819 off = (plt_index + 3) * 4;
2820 base_got = htab->elf.sgotplt;
2824 plt_index = h->plt.offset / plt_entry_size;
2825 off = plt_index * 4;
2826 base_got = htab->elf.igotplt;
2829 if (h->dynindx == -1
2833 /* This references the local defitionion. We must
2834 initialize this entry in the global offset table.
2835 Since the offset must always be a multiple of 8,
2836 we use the least significant bit to record
2837 whether we have initialized it already.
2839 When doing a dynamic link, we create a .rela.got
2840 relocation entry to initialize the value. This
2841 is done in the finish_dynamic_symbol routine. */
2846 bfd_put_32 (output_bfd, relocation,
2847 base_got->contents + off);
2855 relocation = (base_got->output_section->vma
2856 + base_got->output_offset + off
2857 - gotplt->output_section->vma
2858 - gotplt->output_offset);
2860 if (rel->r_offset > 1
2861 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2862 && *(contents + rel->r_offset - 2) != 0x8d)
2864 if (bfd_link_pic (info))
2865 goto disallow_got32;
2867 /* Add the GOT base if there is no base register. */
2868 relocation += (gotplt->output_section->vma
2869 + gotplt->output_offset);
2871 else if (htab->elf.splt == NULL)
2873 /* Adjust for static executables. */
2874 relocation += gotplt->output_offset;
2880 if (h->plt.offset == (bfd_vma) -1)
2882 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2883 if (r_type == R_386_32
2884 && (input_section->flags & SEC_CODE) == 0)
2885 goto do_ifunc_pointer;
2886 goto bad_ifunc_reloc;
2889 relocation = (resolved_plt->output_section->vma
2890 + resolved_plt->output_offset + plt_offset);
2896 if (h->root.root.string)
2897 name = h->root.root.string;
2899 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2902 /* xgettext:c-format */
2903 (_("%B: relocation %s against STT_GNU_IFUNC "
2904 "symbol `%s' isn't supported"), input_bfd,
2906 bfd_set_error (bfd_error_bad_value);
2910 /* Generate dynamic relcoation only when there is a
2911 non-GOT reference in a shared object. */
2912 if ((bfd_link_pic (info) && h->non_got_ref)
2913 || h->plt.offset == (bfd_vma) -1)
2915 Elf_Internal_Rela outrel;
2920 /* Need a dynamic relocation to get the real function
2922 offset = _bfd_elf_section_offset (output_bfd,
2926 if (offset == (bfd_vma) -1
2927 || offset == (bfd_vma) -2)
2930 outrel.r_offset = (input_section->output_section->vma
2931 + input_section->output_offset
2934 if (h->dynindx == -1
2936 || bfd_link_executable (info))
2938 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
2939 h->root.root.string,
2940 h->root.u.def.section->owner);
2942 /* This symbol is resolved locally. */
2943 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2944 bfd_put_32 (output_bfd,
2945 (h->root.u.def.value
2946 + h->root.u.def.section->output_section->vma
2947 + h->root.u.def.section->output_offset),
2951 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2953 /* Dynamic relocations are stored in
2954 1. .rel.ifunc section in PIC object.
2955 2. .rel.got section in dynamic executable.
2956 3. .rel.iplt section in static executable. */
2957 if (bfd_link_pic (info))
2958 sreloc = htab->elf.irelifunc;
2959 else if (htab->elf.splt != NULL)
2960 sreloc = htab->elf.srelgot;
2962 sreloc = htab->elf.irelplt;
2963 elf_append_rel (output_bfd, sreloc, &outrel);
2965 /* If this reloc is against an external symbol, we
2966 do not want to fiddle with the addend. Otherwise,
2967 we need to include the symbol value so that it
2968 becomes an addend for the dynamic reloc. For an
2969 internal symbol, we have updated addend. */
2978 relocation -= (gotplt->output_section->vma
2979 + gotplt->output_offset);
2984 resolved_to_zero = (eh != NULL
2985 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2993 /* Avoid optimizing _DYNAMIC since ld.so may use its
2994 link-time address. */
2995 if (h == htab->elf.hdynamic)
2998 if (bfd_link_pic (info))
3000 /* It is OK to convert mov to lea and convert indirect
3001 branch to direct branch. It is OK to convert adc,
3002 add, and, cmp, or, sbb, sub, test, xor only when PIC
3004 unsigned int opcode, addend;
3005 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
3008 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3009 if (opcode != 0x8b && opcode != 0xff)
3013 /* Resolve "mov GOT[(%reg)], %reg",
3014 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
3015 and "binop foo@GOT[(%reg)], %reg". */
3017 || (h->plt.offset == (bfd_vma) -1
3018 && h->got.offset == (bfd_vma) -1)
3019 || htab->elf.sgotplt == NULL)
3022 offplt = (htab->elf.sgotplt->output_section->vma
3023 + htab->elf.sgotplt->output_offset);
3025 /* It is relative to .got.plt section. */
3026 if (h->got.offset != (bfd_vma) -1)
3027 /* Use GOT entry. Mask off the least significant bit in
3028 GOT offset which may be set by R_386_GOT32 processing
3030 relocation = (htab->elf.sgot->output_section->vma
3031 + htab->elf.sgot->output_offset
3032 + (h->got.offset & ~1) - offplt);
3034 /* Use GOTPLT entry. */
3035 relocation = (h->plt.offset / plt_entry_size
3036 - htab->plt.has_plt0 + 3) * 4;
3038 if (!bfd_link_pic (info))
3040 /* If not PIC, add the .got.plt section address for
3041 baseless addressing. */
3043 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3044 if ((modrm & 0xc7) == 0x5)
3045 relocation += offplt;
3048 unresolved_reloc = FALSE;
3053 /* Relocation is to the entry for this symbol in the global
3055 if (htab->elf.sgot == NULL)
3058 relative_reloc = FALSE;
3063 off = h->got.offset;
3064 dyn = htab->elf.dynamic_sections_created;
3065 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3066 bfd_link_pic (info),
3068 || (bfd_link_pic (info)
3069 && SYMBOL_REFERENCES_LOCAL (info, h))
3070 || (ELF_ST_VISIBILITY (h->other)
3071 && h->root.type == bfd_link_hash_undefweak))
3073 /* This is actually a static link, or it is a
3074 -Bsymbolic link and the symbol is defined
3075 locally, or the symbol was forced to be local
3076 because of a version file. We must initialize
3077 this entry in the global offset table. Since the
3078 offset must always be a multiple of 4, we use the
3079 least significant bit to record whether we have
3080 initialized it already.
3082 When doing a dynamic link, we create a .rel.got
3083 relocation entry to initialize the value. This
3084 is done in the finish_dynamic_symbol routine. */
3089 bfd_put_32 (output_bfd, relocation,
3090 htab->elf.sgot->contents + off);
3093 if (h->dynindx == -1
3095 && h->root.type != bfd_link_hash_undefweak
3096 && bfd_link_pic (info))
3098 /* PR ld/21402: If this symbol isn't dynamic
3099 in PIC, generate R_386_RELATIVE here. */
3100 eh->no_finish_dynamic_symbol = 1;
3101 relative_reloc = TRUE;
3106 unresolved_reloc = FALSE;
3110 if (local_got_offsets == NULL)
3113 off = local_got_offsets[r_symndx];
3115 /* The offset must always be a multiple of 4. We use
3116 the least significant bit to record whether we have
3117 already generated the necessary reloc. */
3122 bfd_put_32 (output_bfd, relocation,
3123 htab->elf.sgot->contents + off);
3124 local_got_offsets[r_symndx] |= 1;
3126 if (bfd_link_pic (info))
3127 relative_reloc = TRUE;
3134 Elf_Internal_Rela outrel;
3136 s = htab->elf.srelgot;
3140 outrel.r_offset = (htab->elf.sgot->output_section->vma
3141 + htab->elf.sgot->output_offset
3143 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3144 elf_append_rel (output_bfd, s, &outrel);
3147 if (off >= (bfd_vma) -2)
3150 relocation = (htab->elf.sgot->output_section->vma
3151 + htab->elf.sgot->output_offset + off);
3152 if (rel->r_offset > 1
3153 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3154 && *(contents + rel->r_offset - 2) != 0x8d)
3156 if (bfd_link_pic (info))
3158 /* For PIC, disallow R_386_GOT32 without a base
3159 register, except for "lea foo@GOT, %reg", since
3160 we don't know what the GOT base is. */
3164 if (h == NULL || h->root.root.string == NULL)
3165 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3168 name = h->root.root.string;
3171 /* xgettext:c-format */
3172 (_("%B: direct GOT relocation %s against `%s'"
3173 " without base register can not be used"
3174 " when making a shared object"),
3175 input_bfd, howto->name, name);
3176 bfd_set_error (bfd_error_bad_value);
3182 /* Subtract the .got.plt section address only with a base
3184 relocation -= (htab->elf.sgotplt->output_section->vma
3185 + htab->elf.sgotplt->output_offset);
3191 /* Relocation is relative to the start of the global offset
3194 /* Check to make sure it isn't a protected function or data
3195 symbol for shared library since it may not be local when
3196 used as function address or with copy relocation. We also
3197 need to make sure that a symbol is referenced locally. */
3198 if (!bfd_link_executable (info) && h)
3200 if (!h->def_regular)
3204 switch (ELF_ST_VISIBILITY (h->other))
3207 v = _("hidden symbol");
3210 v = _("internal symbol");
3213 v = _("protected symbol");
3221 /* xgettext:c-format */
3222 (_("%B: relocation R_386_GOTOFF against undefined %s"
3223 " `%s' can not be used when making a shared object"),
3224 input_bfd, v, h->root.root.string);
3225 bfd_set_error (bfd_error_bad_value);
3228 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3229 && (h->type == STT_FUNC
3230 || h->type == STT_OBJECT)
3231 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3234 /* xgettext:c-format */
3235 (_("%B: relocation R_386_GOTOFF against protected %s"
3236 " `%s' can not be used when making a shared object"),
3238 h->type == STT_FUNC ? "function" : "data",
3239 h->root.root.string);
3240 bfd_set_error (bfd_error_bad_value);
3245 /* Note that sgot is not involved in this
3246 calculation. We always want the start of .got.plt. If we
3247 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3248 permitted by the ABI, we might have to change this
3250 relocation -= htab->elf.sgotplt->output_section->vma
3251 + htab->elf.sgotplt->output_offset;
3255 /* Use global offset table as symbol value. */
3256 relocation = htab->elf.sgotplt->output_section->vma
3257 + htab->elf.sgotplt->output_offset;
3258 unresolved_reloc = FALSE;
3262 /* Relocation is to the entry for this symbol in the
3263 procedure linkage table. */
3265 /* Resolve a PLT32 reloc against a local symbol directly,
3266 without using the procedure linkage table. */
3270 if ((h->plt.offset == (bfd_vma) -1
3271 && eh->plt_got.offset == (bfd_vma) -1)
3272 || htab->elf.splt == NULL)
3274 /* We didn't make a PLT entry for this symbol. This
3275 happens when statically linking PIC code, or when
3276 using -Bsymbolic. */
3280 if (h->plt.offset != (bfd_vma) -1)
3282 if (htab->plt_second != NULL)
3284 resolved_plt = htab->plt_second;
3285 plt_offset = eh->plt_second.offset;
3289 resolved_plt = htab->elf.splt;
3290 plt_offset = h->plt.offset;
3295 resolved_plt = htab->plt_got;
3296 plt_offset = eh->plt_got.offset;
3299 relocation = (resolved_plt->output_section->vma
3300 + resolved_plt->output_offset
3302 unresolved_reloc = FALSE;
3306 /* Set to symbol size. */
3307 relocation = st_size;
3312 if ((input_section->flags & SEC_ALLOC) == 0
3316 /* Copy dynamic function pointer relocations. Don't generate
3317 dynamic relocations against resolved undefined weak symbols
3318 in PIE, except for R_386_PC32. */
3319 if ((bfd_link_pic (info)
3321 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3322 && (!resolved_to_zero
3323 || r_type == R_386_PC32))
3324 || h->root.type != bfd_link_hash_undefweak))
3325 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3326 || !SYMBOL_CALLS_LOCAL (info, h)))
3327 || (ELIMINATE_COPY_RELOCS
3328 && !bfd_link_pic (info)
3332 || eh->func_pointer_refcount > 0
3333 || (h->root.type == bfd_link_hash_undefweak
3334 && !resolved_to_zero))
3335 && ((h->def_dynamic && !h->def_regular)
3336 /* Undefined weak symbol is bound locally when
3338 || h->root.type == bfd_link_hash_undefweak)))
3340 Elf_Internal_Rela outrel;
3341 bfd_boolean skip, relocate;
3344 /* When generating a shared object, these relocations
3345 are copied into the output file to be resolved at run
3352 _bfd_elf_section_offset (output_bfd, info, input_section,
3354 if (outrel.r_offset == (bfd_vma) -1)
3356 else if (outrel.r_offset == (bfd_vma) -2)
3357 skip = TRUE, relocate = TRUE;
3358 outrel.r_offset += (input_section->output_section->vma
3359 + input_section->output_offset);
3362 memset (&outrel, 0, sizeof outrel);
3365 && (r_type == R_386_PC32
3366 || !(bfd_link_executable (info)
3367 || SYMBOLIC_BIND (info, h))
3368 || !h->def_regular))
3369 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3372 /* This symbol is local, or marked to become local. */
3374 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3377 sreloc = elf_section_data (input_section)->sreloc;
3379 if (sreloc == NULL || sreloc->contents == NULL)
3381 r = bfd_reloc_notsupported;
3382 goto check_relocation_error;
3385 elf_append_rel (output_bfd, sreloc, &outrel);
3387 /* If this reloc is against an external symbol, we do
3388 not want to fiddle with the addend. Otherwise, we
3389 need to include the symbol value so that it becomes
3390 an addend for the dynamic reloc. */
3397 if (!bfd_link_executable (info))
3399 Elf_Internal_Rela outrel;
3402 outrel.r_offset = rel->r_offset
3403 + input_section->output_section->vma
3404 + input_section->output_offset;
3405 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3406 sreloc = elf_section_data (input_section)->sreloc;
3409 elf_append_rel (output_bfd, sreloc, &outrel);
3414 case R_386_TLS_GOTDESC:
3415 case R_386_TLS_DESC_CALL:
3416 case R_386_TLS_IE_32:
3417 case R_386_TLS_GOTIE:
3418 tls_type = GOT_UNKNOWN;
3419 if (h == NULL && local_got_offsets)
3420 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
3422 tls_type = elf_x86_hash_entry(h)->tls_type;
3423 if (tls_type == GOT_TLS_IE)
3424 tls_type = GOT_TLS_IE_NEG;
3426 if (! elf_i386_tls_transition (info, input_bfd,
3427 input_section, contents,
3428 symtab_hdr, sym_hashes,
3429 &r_type, tls_type, rel,
3430 relend, h, r_symndx, TRUE))
3433 if (r_type == R_386_TLS_LE_32)
3435 BFD_ASSERT (! unresolved_reloc);
3436 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3441 /* GD->LE transition. */
3442 type = *(contents + rel->r_offset - 2);
3446 leal foo@tlsgd(,%ebx,1), %eax
3447 call ___tls_get_addr@PLT
3450 subl $foo@tpoff, %eax
3451 (6 byte form of subl). */
3452 roff = rel->r_offset + 5;
3457 leal foo@tlsgd(%ebx), %eax
3458 call ___tls_get_addr@PLT
3461 leal foo@tlsgd(%reg), %eax
3462 call *___tls_get_addr@GOT(%reg)
3463 which may be converted to
3464 addr32 call ___tls_get_addr
3466 movl %gs:0, %eax; subl $foo@tpoff, %eax
3467 (6 byte form of subl). */
3468 roff = rel->r_offset + 6;
3470 memcpy (contents + roff - 8,
3471 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3472 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3474 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
3479 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3481 /* GDesc -> LE transition.
3482 It's originally something like:
3483 leal x@tlsdesc(%ebx), %eax
3487 Registers other than %eax may be set up here. */
3492 roff = rel->r_offset;
3493 val = bfd_get_8 (input_bfd, contents + roff - 1);
3495 /* Now modify the instruction as appropriate. */
3496 /* aoliva FIXME: remove the above and xor the byte
3498 bfd_put_8 (output_bfd, val ^ 0x86,
3499 contents + roff - 1);
3500 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3504 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3506 /* GDesc -> LE transition.
3514 roff = rel->r_offset;
3515 bfd_put_8 (output_bfd, 0x66, contents + roff);
3516 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3519 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3523 /* IE->LE transition:
3524 Originally it can be one of:
3532 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3535 /* movl foo, %eax. */
3536 bfd_put_8 (output_bfd, 0xb8,
3537 contents + rel->r_offset - 1);
3543 type = bfd_get_8 (input_bfd,
3544 contents + rel->r_offset - 2);
3549 bfd_put_8 (output_bfd, 0xc7,
3550 contents + rel->r_offset - 2);
3551 bfd_put_8 (output_bfd,
3552 0xc0 | ((val >> 3) & 7),
3553 contents + rel->r_offset - 1);
3557 bfd_put_8 (output_bfd, 0x81,
3558 contents + rel->r_offset - 2);
3559 bfd_put_8 (output_bfd,
3560 0xc0 | ((val >> 3) & 7),
3561 contents + rel->r_offset - 1);
3568 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3569 contents + rel->r_offset);
3574 unsigned int val, type;
3576 /* {IE_32,GOTIE}->LE transition:
3577 Originally it can be one of:
3578 subl foo(%reg1), %reg2
3579 movl foo(%reg1), %reg2
3580 addl foo(%reg1), %reg2
3583 movl $foo, %reg2 (6 byte form)
3584 addl $foo, %reg2. */
3585 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3586 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3590 bfd_put_8 (output_bfd, 0xc7,
3591 contents + rel->r_offset - 2);
3592 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3593 contents + rel->r_offset - 1);
3595 else if (type == 0x2b)
3598 bfd_put_8 (output_bfd, 0x81,
3599 contents + rel->r_offset - 2);
3600 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3601 contents + rel->r_offset - 1);
3603 else if (type == 0x03)
3606 bfd_put_8 (output_bfd, 0x81,
3607 contents + rel->r_offset - 2);
3608 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3609 contents + rel->r_offset - 1);
3613 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3614 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3615 contents + rel->r_offset);
3617 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3618 contents + rel->r_offset);
3623 if (htab->elf.sgot == NULL)
3628 off = h->got.offset;
3629 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
3633 if (local_got_offsets == NULL)
3636 off = local_got_offsets[r_symndx];
3637 offplt = local_tlsdesc_gotents[r_symndx];
3644 Elf_Internal_Rela outrel;
3648 if (htab->elf.srelgot == NULL)
3651 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3653 if (GOT_TLS_GDESC_P (tls_type))
3656 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3657 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3658 <= htab->elf.sgotplt->size);
3659 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3660 + htab->elf.sgotplt->output_offset
3662 + htab->sgotplt_jump_table_size);
3663 sreloc = htab->elf.srelplt;
3664 loc = sreloc->contents;
3665 loc += (htab->next_tls_desc_index++
3666 * sizeof (Elf32_External_Rel));
3667 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3668 <= sreloc->contents + sreloc->size);
3669 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3672 BFD_ASSERT (! unresolved_reloc);
3673 bfd_put_32 (output_bfd,
3674 relocation - _bfd_x86_elf_dtpoff_base (info),
3675 htab->elf.sgotplt->contents + offplt
3676 + htab->sgotplt_jump_table_size + 4);
3680 bfd_put_32 (output_bfd, 0,
3681 htab->elf.sgotplt->contents + offplt
3682 + htab->sgotplt_jump_table_size + 4);
3686 sreloc = htab->elf.srelgot;
3688 outrel.r_offset = (htab->elf.sgot->output_section->vma
3689 + htab->elf.sgot->output_offset + off);
3691 if (GOT_TLS_GD_P (tls_type))
3692 dr_type = R_386_TLS_DTPMOD32;
3693 else if (GOT_TLS_GDESC_P (tls_type))
3695 else if (tls_type == GOT_TLS_IE_POS)
3696 dr_type = R_386_TLS_TPOFF;
3698 dr_type = R_386_TLS_TPOFF32;
3700 if (dr_type == R_386_TLS_TPOFF && indx == 0)
3701 bfd_put_32 (output_bfd,
3702 relocation - _bfd_x86_elf_dtpoff_base (info),
3703 htab->elf.sgot->contents + off);
3704 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3705 bfd_put_32 (output_bfd,
3706 _bfd_x86_elf_dtpoff_base (info) - relocation,
3707 htab->elf.sgot->contents + off);
3708 else if (dr_type != R_386_TLS_DESC)
3709 bfd_put_32 (output_bfd, 0,
3710 htab->elf.sgot->contents + off);
3711 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3713 elf_append_rel (output_bfd, sreloc, &outrel);
3715 if (GOT_TLS_GD_P (tls_type))
3719 BFD_ASSERT (! unresolved_reloc);
3720 bfd_put_32 (output_bfd,
3721 relocation - _bfd_x86_elf_dtpoff_base (info),
3722 htab->elf.sgot->contents + off + 4);
3726 bfd_put_32 (output_bfd, 0,
3727 htab->elf.sgot->contents + off + 4);
3728 outrel.r_info = ELF32_R_INFO (indx,
3729 R_386_TLS_DTPOFF32);
3730 outrel.r_offset += 4;
3731 elf_append_rel (output_bfd, sreloc, &outrel);
3734 else if (tls_type == GOT_TLS_IE_BOTH)
3736 bfd_put_32 (output_bfd,
3738 ? relocation - _bfd_x86_elf_dtpoff_base (info)
3740 htab->elf.sgot->contents + off + 4);
3741 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3742 outrel.r_offset += 4;
3743 elf_append_rel (output_bfd, sreloc, &outrel);
3750 local_got_offsets[r_symndx] |= 1;
3753 if (off >= (bfd_vma) -2
3754 && ! GOT_TLS_GDESC_P (tls_type))
3756 if (r_type == R_386_TLS_GOTDESC
3757 || r_type == R_386_TLS_DESC_CALL)
3759 relocation = htab->sgotplt_jump_table_size + offplt;
3760 unresolved_reloc = FALSE;
3762 else if (r_type == ELF32_R_TYPE (rel->r_info))
3764 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3765 + htab->elf.sgotplt->output_offset;
3766 relocation = htab->elf.sgot->output_section->vma
3767 + htab->elf.sgot->output_offset + off - g_o_t;
3768 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3769 && tls_type == GOT_TLS_IE_BOTH)
3771 if (r_type == R_386_TLS_IE)
3772 relocation += g_o_t;
3773 unresolved_reloc = FALSE;
3775 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3777 unsigned int val, type;
3780 /* GD->IE transition. */
3781 type = *(contents + rel->r_offset - 2);
3782 val = *(contents + rel->r_offset - 1);
3786 leal foo@tlsgd(,%ebx,1), %eax
3787 call ___tls_get_addr@PLT
3790 subl $foo@gottpoff(%ebx), %eax. */
3792 roff = rel->r_offset - 3;
3797 leal foo@tlsgd(%ebx), %eax
3798 call ___tls_get_addr@PLT
3801 leal foo@tlsgd(%reg), %eax
3802 call *___tls_get_addr@GOT(%reg)
3803 which may be converted to
3804 addr32 call ___tls_get_addr
3807 subl $foo@gottpoff(%reg), %eax. */
3808 roff = rel->r_offset - 2;
3810 memcpy (contents + roff,
3811 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3812 contents[roff + 7] = 0x80 | (val & 7);
3813 /* If foo is used only with foo@gotntpoff(%reg) and
3814 foo@indntpoff, but not with foo@gottpoff(%reg), change
3815 subl $foo@gottpoff(%reg), %eax
3817 addl $foo@gotntpoff(%reg), %eax. */
3818 if (tls_type == GOT_TLS_IE_POS)
3819 contents[roff + 6] = 0x03;
3820 bfd_put_32 (output_bfd,
3821 htab->elf.sgot->output_section->vma
3822 + htab->elf.sgot->output_offset + off
3823 - htab->elf.sgotplt->output_section->vma
3824 - htab->elf.sgotplt->output_offset,
3825 contents + roff + 8);
3826 /* Skip R_386_PLT32 and R_386_GOT32X. */
3831 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3833 /* GDesc -> IE transition.
3834 It's originally something like:
3835 leal x@tlsdesc(%ebx), %eax
3838 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3840 movl x@gottpoff(%ebx), %eax # before negl %eax
3842 Registers other than %eax may be set up here. */
3846 /* First, make sure it's a leal adding ebx to a 32-bit
3847 offset into any register, although it's probably
3848 almost always going to be eax. */
3849 roff = rel->r_offset;
3851 /* Now modify the instruction as appropriate. */
3852 /* To turn a leal into a movl in the form we use it, it
3853 suffices to change the first byte from 0x8d to 0x8b.
3854 aoliva FIXME: should we decide to keep the leal, all
3855 we have to do is remove the statement below, and
3856 adjust the relaxation of R_386_TLS_DESC_CALL. */
3857 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3859 if (tls_type == GOT_TLS_IE_BOTH)
3862 bfd_put_32 (output_bfd,
3863 htab->elf.sgot->output_section->vma
3864 + htab->elf.sgot->output_offset + off
3865 - htab->elf.sgotplt->output_section->vma
3866 - htab->elf.sgotplt->output_offset,
3870 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3872 /* GDesc -> IE transition.
3880 depending on how we transformed the TLS_GOTDESC above.
3885 roff = rel->r_offset;
3887 /* Now modify the instruction as appropriate. */
3888 if (tls_type != GOT_TLS_IE_NEG)
3891 bfd_put_8 (output_bfd, 0x66, contents + roff);
3892 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3897 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3898 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3908 if (! elf_i386_tls_transition (info, input_bfd,
3909 input_section, contents,
3910 symtab_hdr, sym_hashes,
3911 &r_type, GOT_UNKNOWN, rel,
3912 relend, h, r_symndx, TRUE))
3915 if (r_type != R_386_TLS_LDM)
3917 /* LD->LE transition. Change
3918 leal foo@tlsldm(%ebx) %eax
3919 call ___tls_get_addr@PLT
3923 leal 0(%esi,1), %esi
3925 leal foo@tlsldm(%reg) %eax
3926 call *___tls_get_addr@GOT(%reg)
3927 which may be converted to
3928 addr32 call ___tls_get_addr
3931 leal 0(%esi), %esi */
3932 BFD_ASSERT (r_type == R_386_TLS_LE_32);
3933 if (*(contents + rel->r_offset + 4) == 0xff
3934 || *(contents + rel->r_offset + 4) == 0x67)
3935 memcpy (contents + rel->r_offset - 2,
3936 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3938 memcpy (contents + rel->r_offset - 2,
3939 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3940 /* Skip R_386_PC32/R_386_PLT32. */
3946 if (htab->elf.sgot == NULL)
3949 off = htab->tls_ld_or_ldm_got.offset;
3954 Elf_Internal_Rela outrel;
3956 if (htab->elf.srelgot == NULL)
3959 outrel.r_offset = (htab->elf.sgot->output_section->vma
3960 + htab->elf.sgot->output_offset + off);
3962 bfd_put_32 (output_bfd, 0,
3963 htab->elf.sgot->contents + off);
3964 bfd_put_32 (output_bfd, 0,
3965 htab->elf.sgot->contents + off + 4);
3966 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3967 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
3968 htab->tls_ld_or_ldm_got.offset |= 1;
3970 relocation = htab->elf.sgot->output_section->vma
3971 + htab->elf.sgot->output_offset + off
3972 - htab->elf.sgotplt->output_section->vma
3973 - htab->elf.sgotplt->output_offset;
3974 unresolved_reloc = FALSE;
3977 case R_386_TLS_LDO_32:
3978 if (!bfd_link_executable (info)
3979 || (input_section->flags & SEC_CODE) == 0)
3980 relocation -= _bfd_x86_elf_dtpoff_base (info);
3982 /* When converting LDO to LE, we must negate. */
3983 relocation = -elf_i386_tpoff (info, relocation);
3986 case R_386_TLS_LE_32:
3988 if (!bfd_link_executable (info))
3990 Elf_Internal_Rela outrel;
3993 outrel.r_offset = rel->r_offset
3994 + input_section->output_section->vma
3995 + input_section->output_offset;
3996 if (h != NULL && h->dynindx != -1)
4000 if (r_type == R_386_TLS_LE_32)
4001 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4003 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4004 sreloc = elf_section_data (input_section)->sreloc;
4007 elf_append_rel (output_bfd, sreloc, &outrel);
4010 else if (r_type == R_386_TLS_LE_32)
4011 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
4013 relocation -= _bfd_x86_elf_dtpoff_base (info);
4015 else if (r_type == R_386_TLS_LE_32)
4016 relocation = elf_i386_tpoff (info, relocation);
4018 relocation = -elf_i386_tpoff (info, relocation);
4025 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4026 because such sections are not SEC_ALLOC and thus ld.so will
4027 not process them. */
4028 if (unresolved_reloc
4029 && !((input_section->flags & SEC_DEBUGGING) != 0
4031 && _bfd_elf_section_offset (output_bfd, info, input_section,
4032 rel->r_offset) != (bfd_vma) -1)
4035 /* xgettext:c-format */
4036 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
4041 h->root.root.string);
4046 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4047 contents, rel->r_offset,
4050 check_relocation_error:
4051 if (r != bfd_reloc_ok)
4056 name = h->root.root.string;
4059 name = bfd_elf_string_from_elf_section (input_bfd,
4060 symtab_hdr->sh_link,
4065 name = bfd_section_name (input_bfd, sec);
4068 if (r == bfd_reloc_overflow)
4069 (*info->callbacks->reloc_overflow)
4070 (info, (h ? &h->root : NULL), name, howto->name,
4071 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
4075 /* xgettext:c-format */
4076 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
4077 input_bfd, input_section,
4078 rel->r_offset, name, (int) r);
4089 Elf_Internal_Shdr *rel_hdr;
4090 size_t deleted = rel - wrel;
4092 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4093 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4094 if (rel_hdr->sh_size == 0)
4096 /* It is too late to remove an empty reloc section. Leave
4098 ??? What is wrong with an empty section??? */
4099 rel_hdr->sh_size = rel_hdr->sh_entsize;
4102 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4103 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4104 input_section->reloc_count -= deleted;
4110 /* Finish up dynamic symbol handling. We set the contents of various
4111 dynamic sections here. */
4114 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4115 struct bfd_link_info *info,
4116 struct elf_link_hash_entry *h,
4117 Elf_Internal_Sym *sym)
4119 struct elf_x86_link_hash_table *htab;
4120 unsigned plt_entry_size;
4121 struct elf_x86_link_hash_entry *eh;
4122 bfd_boolean local_undefweak;
4123 bfd_boolean use_plt_second;
4125 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4129 plt_entry_size = htab->plt.plt_entry_size;
4131 /* Use the second PLT section only if there is .plt section. */
4132 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
4134 eh = (struct elf_x86_link_hash_entry *) h;
4135 if (eh->no_finish_dynamic_symbol)
4138 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4139 resolved undefined weak symbols in executable so that their
4140 references have value 0 at run-time. */
4141 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, I386_ELF_DATA,
4145 if (h->plt.offset != (bfd_vma) -1)
4147 bfd_vma plt_index, plt_offset;
4149 Elf_Internal_Rela rel;
4151 asection *plt, *resolved_plt, *gotplt, *relplt;
4153 /* When building a static executable, use .iplt, .igot.plt and
4154 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4155 if (htab->elf.splt != NULL)
4157 plt = htab->elf.splt;
4158 gotplt = htab->elf.sgotplt;
4159 relplt = htab->elf.srelplt;
4163 plt = htab->elf.iplt;
4164 gotplt = htab->elf.igotplt;
4165 relplt = htab->elf.irelplt;
4168 /* This symbol has an entry in the procedure linkage table. Set
4171 if ((h->dynindx == -1
4173 && !((h->forced_local || bfd_link_executable (info))
4175 && h->type == STT_GNU_IFUNC))
4181 /* Get the index in the procedure linkage table which
4182 corresponds to this symbol. This is the index of this symbol
4183 in all the symbols for which we are making plt entries. The
4184 first entry in the procedure linkage table is reserved.
4186 Get the offset into the .got table of the entry that
4187 corresponds to this function. Each .got entry is 4 bytes.
4188 The first three are reserved.
4190 For static executables, we don't reserve anything. */
4192 if (plt == htab->elf.splt)
4194 got_offset = (h->plt.offset / plt_entry_size
4195 - htab->plt.has_plt0);
4196 got_offset = (got_offset + 3) * 4;
4200 got_offset = h->plt.offset / plt_entry_size;
4201 got_offset = got_offset * 4;
4204 /* Fill in the entry in the procedure linkage table and update
4206 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
4211 const bfd_byte *plt_entry;
4212 if (bfd_link_pic (info))
4213 plt_entry = htab->non_lazy_plt->pic_plt_entry;
4215 plt_entry = htab->non_lazy_plt->plt_entry;
4216 memcpy (htab->plt_second->contents + eh->plt_second.offset,
4217 plt_entry, htab->non_lazy_plt->plt_entry_size);
4219 resolved_plt = htab->plt_second;
4220 plt_offset = eh->plt_second.offset;
4225 plt_offset = h->plt.offset;
4228 if (! bfd_link_pic (info))
4230 bfd_put_32 (output_bfd,
4231 (gotplt->output_section->vma
4232 + gotplt->output_offset
4234 resolved_plt->contents + plt_offset
4235 + htab->plt.plt_got_offset);
4237 if (htab->is_vxworks)
4239 int s, k, reloc_index;
4241 /* Create the R_386_32 relocation referencing the GOT
4242 for this PLT entry. */
4244 /* S: Current slot number (zero-based). */
4245 s = ((h->plt.offset - htab->plt.plt_entry_size)
4246 / htab->plt.plt_entry_size);
4247 /* K: Number of relocations for PLTResolve. */
4248 if (bfd_link_pic (info))
4249 k = PLTRESOLVE_RELOCS_SHLIB;
4251 k = PLTRESOLVE_RELOCS;
4252 /* Skip the PLTresolve relocations, and the relocations for
4253 the other PLT slots. */
4254 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4255 loc = (htab->srelplt2->contents + reloc_index
4256 * sizeof (Elf32_External_Rel));
4258 rel.r_offset = (plt->output_section->vma
4259 + plt->output_offset
4260 + h->plt.offset + 2),
4261 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4262 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4264 /* Create the R_386_32 relocation referencing the beginning of
4265 the PLT for this GOT entry. */
4266 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4267 + htab->elf.sgotplt->output_offset
4269 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4270 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4271 loc + sizeof (Elf32_External_Rel));
4276 bfd_put_32 (output_bfd, got_offset,
4277 resolved_plt->contents + plt_offset
4278 + htab->plt.plt_got_offset);
4281 /* Fill in the entry in the global offset table. Leave the entry
4282 as zero for undefined weak symbol in PIE. No PLT relocation
4283 against undefined weak symbol in PIE. */
4284 if (!local_undefweak)
4286 if (htab->plt.has_plt0)
4287 bfd_put_32 (output_bfd,
4288 (plt->output_section->vma
4289 + plt->output_offset
4291 + htab->lazy_plt->plt_lazy_offset),
4292 gotplt->contents + got_offset);
4294 /* Fill in the entry in the .rel.plt section. */
4295 rel.r_offset = (gotplt->output_section->vma
4296 + gotplt->output_offset
4298 if (h->dynindx == -1
4299 || ((bfd_link_executable (info)
4300 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4302 && h->type == STT_GNU_IFUNC))
4304 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4305 h->root.root.string,
4306 h->root.u.def.section->owner);
4308 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4309 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4310 in the .got.plt section. */
4311 bfd_put_32 (output_bfd,
4312 (h->root.u.def.value
4313 + h->root.u.def.section->output_section->vma
4314 + h->root.u.def.section->output_offset),
4315 gotplt->contents + got_offset);
4316 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4317 /* R_386_IRELATIVE comes last. */
4318 plt_index = htab->next_irelative_index--;
4322 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4323 plt_index = htab->next_jump_slot_index++;
4326 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4327 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4329 /* Don't fill the second and third slots in PLT entry for
4330 static executables nor without PLT0. */
4331 if (plt == htab->elf.splt && htab->plt.has_plt0)
4333 bfd_put_32 (output_bfd,
4334 plt_index * sizeof (Elf32_External_Rel),
4335 plt->contents + h->plt.offset
4336 + htab->lazy_plt->plt_reloc_offset);
4337 bfd_put_32 (output_bfd,
4339 + htab->lazy_plt->plt_plt_offset + 4),
4340 (plt->contents + h->plt.offset
4341 + htab->lazy_plt->plt_plt_offset));
4345 else if (eh->plt_got.offset != (bfd_vma) -1)
4347 bfd_vma got_offset, plt_offset;
4348 asection *plt, *got, *gotplt;
4349 const bfd_byte *got_plt_entry;
4351 /* Set the entry in the GOT procedure linkage table. */
4352 plt = htab->plt_got;
4353 got = htab->elf.sgot;
4354 gotplt = htab->elf.sgotplt;
4355 got_offset = h->got.offset;
4357 if (got_offset == (bfd_vma) -1
4363 /* Fill in the entry in the GOT procedure linkage table. */
4364 if (! bfd_link_pic (info))
4366 got_plt_entry = htab->non_lazy_plt->plt_entry;
4367 got_offset += got->output_section->vma + got->output_offset;
4371 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
4372 got_offset += (got->output_section->vma
4373 + got->output_offset
4374 - gotplt->output_section->vma
4375 - gotplt->output_offset);
4378 plt_offset = eh->plt_got.offset;
4379 memcpy (plt->contents + plt_offset, got_plt_entry,
4380 htab->non_lazy_plt->plt_entry_size);
4381 bfd_put_32 (output_bfd, got_offset,
4382 (plt->contents + plt_offset
4383 + htab->non_lazy_plt->plt_got_offset));
4386 if (!local_undefweak
4388 && (h->plt.offset != (bfd_vma) -1
4389 || eh->plt_got.offset != (bfd_vma) -1))
4391 /* Mark the symbol as undefined, rather than as defined in
4392 the .plt section. Leave the value if there were any
4393 relocations where pointer equality matters (this is a clue
4394 for the dynamic linker, to make function pointer
4395 comparisons work between an application and shared
4396 library), otherwise set it to zero. If a function is only
4397 called from a binary, there is no need to slow down
4398 shared libraries because of that. */
4399 sym->st_shndx = SHN_UNDEF;
4400 if (!h->pointer_equality_needed)
4404 /* Don't generate dynamic GOT relocation against undefined weak
4405 symbol in executable. */
4406 if (h->got.offset != (bfd_vma) -1
4407 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
4408 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
4409 && !local_undefweak)
4411 Elf_Internal_Rela rel;
4412 asection *relgot = htab->elf.srelgot;
4414 /* This symbol has an entry in the global offset table. Set it
4417 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4420 rel.r_offset = (htab->elf.sgot->output_section->vma
4421 + htab->elf.sgot->output_offset
4422 + (h->got.offset & ~(bfd_vma) 1));
4424 /* If this is a static link, or it is a -Bsymbolic link and the
4425 symbol is defined locally or was forced to be local because
4426 of a version file, we just want to emit a RELATIVE reloc.
4427 The entry in the global offset table will already have been
4428 initialized in the relocate_section function. */
4430 && h->type == STT_GNU_IFUNC)
4432 if (h->plt.offset == (bfd_vma) -1)
4434 /* STT_GNU_IFUNC is referenced without PLT. */
4435 if (htab->elf.splt == NULL)
4437 /* use .rel[a].iplt section to store .got relocations
4438 in static executable. */
4439 relgot = htab->elf.irelplt;
4441 if (SYMBOL_REFERENCES_LOCAL (info, h))
4443 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4444 h->root.root.string,
4445 h->root.u.def.section->owner);
4447 bfd_put_32 (output_bfd,
4448 (h->root.u.def.value
4449 + h->root.u.def.section->output_section->vma
4450 + h->root.u.def.section->output_offset),
4451 htab->elf.sgot->contents + h->got.offset);
4452 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4457 else if (bfd_link_pic (info))
4459 /* Generate R_386_GLOB_DAT. */
4467 if (!h->pointer_equality_needed)
4470 /* For non-shared object, we can't use .got.plt, which
4471 contains the real function addres if we need pointer
4472 equality. We load the GOT entry with the PLT entry. */
4473 if (htab->plt_second != NULL)
4475 plt = htab->plt_second;
4476 plt_offset = eh->plt_second.offset;
4480 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4481 plt_offset = h->plt.offset;
4483 bfd_put_32 (output_bfd,
4484 (plt->output_section->vma
4485 + plt->output_offset + plt_offset),
4486 htab->elf.sgot->contents + h->got.offset);
4490 else if (bfd_link_pic (info)
4491 && SYMBOL_REFERENCES_LOCAL (info, h))
4493 BFD_ASSERT((h->got.offset & 1) != 0);
4494 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4498 BFD_ASSERT((h->got.offset & 1) == 0);
4500 bfd_put_32 (output_bfd, (bfd_vma) 0,
4501 htab->elf.sgot->contents + h->got.offset);
4502 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4505 elf_append_rel (output_bfd, relgot, &rel);
4510 Elf_Internal_Rela rel;
4513 /* This symbol needs a copy reloc. Set it up. */
4515 if (h->dynindx == -1
4516 || (h->root.type != bfd_link_hash_defined
4517 && h->root.type != bfd_link_hash_defweak)
4518 || htab->elf.srelbss == NULL
4519 || htab->elf.sreldynrelro == NULL)
4522 rel.r_offset = (h->root.u.def.value
4523 + h->root.u.def.section->output_section->vma
4524 + h->root.u.def.section->output_offset);
4525 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4526 if (h->root.u.def.section == htab->elf.sdynrelro)
4527 s = htab->elf.sreldynrelro;
4529 s = htab->elf.srelbss;
4530 elf_append_rel (output_bfd, s, &rel);
4536 /* Finish up local dynamic symbol handling. We set the contents of
4537 various dynamic sections here. */
4540 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4542 struct elf_link_hash_entry *h
4543 = (struct elf_link_hash_entry *) *slot;
4544 struct bfd_link_info *info
4545 = (struct bfd_link_info *) inf;
4547 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4551 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
4552 here since undefined weak symbol may not be dynamic and may not be
4553 called for elf_i386_finish_dynamic_symbol. */
4556 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
4559 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
4560 struct bfd_link_info *info = (struct bfd_link_info *) inf;
4562 if (h->root.type != bfd_link_hash_undefweak
4563 || h->dynindx != -1)
4566 return elf_i386_finish_dynamic_symbol (info->output_bfd,
4570 /* Used to decide how to sort relocs in an optimal manner for the
4571 dynamic linker, before writing them out. */
4573 static enum elf_reloc_type_class
4574 elf_i386_reloc_type_class (const struct bfd_link_info *info,
4575 const asection *rel_sec ATTRIBUTE_UNUSED,
4576 const Elf_Internal_Rela *rela)
4578 bfd *abfd = info->output_bfd;
4579 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4580 struct elf_link_hash_table *htab = elf_hash_table (info);
4582 if (htab->dynsym != NULL
4583 && htab->dynsym->contents != NULL)
4585 /* Check relocation against STT_GNU_IFUNC symbol if there are
4587 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
4588 if (r_symndx != STN_UNDEF)
4590 Elf_Internal_Sym sym;
4591 if (!bed->s->swap_symbol_in (abfd,
4592 (htab->dynsym->contents
4593 + r_symndx * sizeof (Elf32_External_Sym)),
4597 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
4598 return reloc_class_ifunc;
4602 switch (ELF32_R_TYPE (rela->r_info))
4604 case R_386_IRELATIVE:
4605 return reloc_class_ifunc;
4606 case R_386_RELATIVE:
4607 return reloc_class_relative;
4608 case R_386_JUMP_SLOT:
4609 return reloc_class_plt;
4611 return reloc_class_copy;
4613 return reloc_class_normal;
4617 /* Finish up the dynamic sections. */
4620 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4621 struct bfd_link_info *info)
4623 struct elf_x86_link_hash_table *htab;
4626 const struct elf_i386_backend_data *abed;
4628 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4632 dynobj = htab->elf.dynobj;
4633 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4634 abed = get_elf_i386_backend_data (output_bfd);
4636 if (htab->elf.dynamic_sections_created)
4638 Elf32_External_Dyn *dyncon, *dynconend;
4640 if (sdyn == NULL || htab->elf.sgot == NULL)
4643 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4644 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4645 for (; dyncon < dynconend; dyncon++)
4647 Elf_Internal_Dyn dyn;
4650 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4655 if (htab->is_vxworks
4656 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4661 s = htab->elf.sgotplt;
4662 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4666 s = htab->elf.srelplt;
4667 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4671 s = htab->elf.srelplt;
4672 dyn.d_un.d_val = s->size;
4676 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4679 if (htab->elf.splt && htab->elf.splt->size > 0)
4681 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4682 really seem like the right value. */
4683 elf_section_data (htab->elf.splt->output_section)
4684 ->this_hdr.sh_entsize = 4;
4686 if (htab->plt.has_plt0)
4688 /* Fill in the special first entry in the procedure linkage
4690 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
4691 htab->lazy_plt->plt0_entry_size);
4692 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
4693 abed->plt0_pad_byte,
4694 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
4695 if (!bfd_link_pic (info))
4697 bfd_put_32 (output_bfd,
4698 (htab->elf.sgotplt->output_section->vma
4699 + htab->elf.sgotplt->output_offset
4701 htab->elf.splt->contents
4702 + htab->lazy_plt->plt0_got1_offset);
4703 bfd_put_32 (output_bfd,
4704 (htab->elf.sgotplt->output_section->vma
4705 + htab->elf.sgotplt->output_offset
4707 htab->elf.splt->contents
4708 + htab->lazy_plt->plt0_got2_offset);
4710 if (htab->is_vxworks)
4712 Elf_Internal_Rela rel;
4713 int num_plts = (htab->elf.splt->size
4714 / htab->plt.plt_entry_size) - 1;
4716 asection *srelplt2 = htab->srelplt2;
4718 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4719 + 4. On IA32 we use REL relocations so the
4720 addend goes in the PLT directly. */
4721 rel.r_offset = (htab->elf.splt->output_section->vma
4722 + htab->elf.splt->output_offset
4723 + htab->lazy_plt->plt0_got1_offset);
4724 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4726 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4727 srelplt2->contents);
4728 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4730 rel.r_offset = (htab->elf.splt->output_section->vma
4731 + htab->elf.splt->output_offset
4732 + htab->lazy_plt->plt0_got2_offset);
4733 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4735 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4736 srelplt2->contents +
4737 sizeof (Elf32_External_Rel));
4738 /* Correct the .rel.plt.unloaded relocations. */
4739 p = srelplt2->contents;
4740 if (bfd_link_pic (info))
4741 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4743 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4745 for (; num_plts; num_plts--)
4747 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4748 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4750 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4751 p += sizeof (Elf32_External_Rel);
4753 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4754 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
4756 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4757 p += sizeof (Elf32_External_Rel);
4764 if (htab->plt_got != NULL && htab->plt_got->size > 0)
4765 elf_section_data (htab->plt_got->output_section)
4766 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
4768 if (htab->plt_second != NULL && htab->plt_second->size > 0)
4769 elf_section_data (htab->plt_second->output_section)
4770 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
4773 /* Fill in the first three entries in the global offset table. */
4774 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
4776 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4779 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4783 bfd_put_32 (output_bfd,
4785 : sdyn->output_section->vma + sdyn->output_offset),
4786 htab->elf.sgotplt->contents);
4787 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4788 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
4790 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
4793 /* Adjust .eh_frame for .plt section. */
4794 if (htab->plt_eh_frame != NULL
4795 && htab->plt_eh_frame->contents != NULL)
4797 if (htab->elf.splt != NULL
4798 && htab->elf.splt->size != 0
4799 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4800 && htab->elf.splt->output_section != NULL
4801 && htab->plt_eh_frame->output_section != NULL)
4803 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4804 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4805 + htab->plt_eh_frame->output_offset
4806 + PLT_FDE_START_OFFSET;
4807 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4808 htab->plt_eh_frame->contents
4809 + PLT_FDE_START_OFFSET);
4811 if (htab->plt_eh_frame->sec_info_type
4812 == SEC_INFO_TYPE_EH_FRAME)
4814 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4816 htab->plt_eh_frame->contents))
4821 /* Adjust .eh_frame for .plt.got section. */
4822 if (htab->plt_got_eh_frame != NULL
4823 && htab->plt_got_eh_frame->contents != NULL)
4825 if (htab->plt_got != NULL
4826 && htab->plt_got->size != 0
4827 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
4828 && htab->plt_got->output_section != NULL
4829 && htab->plt_got_eh_frame->output_section != NULL)
4831 bfd_vma plt_start = htab->plt_got->output_section->vma;
4832 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
4833 + htab->plt_got_eh_frame->output_offset
4834 + PLT_FDE_START_OFFSET;
4835 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4836 htab->plt_got_eh_frame->contents
4837 + PLT_FDE_START_OFFSET);
4839 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
4841 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4842 htab->plt_got_eh_frame,
4843 htab->plt_got_eh_frame->contents))
4848 /* Adjust .eh_frame for the second PLT section. */
4849 if (htab->plt_second_eh_frame != NULL
4850 && htab->plt_second_eh_frame->contents != NULL)
4852 if (htab->plt_second != NULL
4853 && htab->plt_second->size != 0
4854 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
4855 && htab->plt_second->output_section != NULL
4856 && htab->plt_second_eh_frame->output_section != NULL)
4858 bfd_vma plt_start = htab->plt_second->output_section->vma;
4859 bfd_vma eh_frame_start
4860 = (htab->plt_second_eh_frame->output_section->vma
4861 + htab->plt_second_eh_frame->output_offset
4862 + PLT_FDE_START_OFFSET);
4863 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4864 htab->plt_second_eh_frame->contents
4865 + PLT_FDE_START_OFFSET);
4867 if (htab->plt_second_eh_frame->sec_info_type
4868 == SEC_INFO_TYPE_EH_FRAME)
4870 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4871 htab->plt_second_eh_frame,
4872 htab->plt_second_eh_frame->contents))
4877 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4878 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
4880 /* Fill PLT entries for undefined weak symbols in PIE. */
4881 if (bfd_link_pie (info))
4882 bfd_hash_traverse (&info->hash->table,
4883 elf_i386_pie_finish_undefweak_symbol,
4889 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4890 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4891 It has to be done before elf_link_sort_relocs is called so that
4892 dynamic relocations are properly sorted. */
4895 elf_i386_output_arch_local_syms
4896 (bfd *output_bfd ATTRIBUTE_UNUSED,
4897 struct bfd_link_info *info,
4898 void *flaginfo ATTRIBUTE_UNUSED,
4899 int (*func) (void *, const char *,
4902 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4904 struct elf_x86_link_hash_table *htab
4905 = elf_x86_hash_table (info, I386_ELF_DATA);
4909 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4910 htab_traverse (htab->loc_hash_table,
4911 elf_i386_finish_local_dynamic_symbol,
4917 /* Forward declaration. */
4918 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
4920 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4921 dynamic relocations. */
4924 elf_i386_get_synthetic_symtab (bfd *abfd,
4925 long symcount ATTRIBUTE_UNUSED,
4926 asymbol **syms ATTRIBUTE_UNUSED,
4933 bfd_byte *plt_contents;
4935 const struct elf_x86_lazy_plt_layout *lazy_plt;
4936 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4937 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4938 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
4941 enum elf_x86_plt_type plt_type;
4942 struct elf_x86_plt plts[] =
4944 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4945 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4946 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4947 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
4952 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4955 if (dynsymcount <= 0)
4958 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4962 non_lazy_plt = NULL;
4963 /* Silence GCC 6. */
4965 non_lazy_ibt_plt = NULL;
4966 lazy_ibt_plt = NULL;
4967 switch (get_elf_i386_backend_data (abfd)->os)
4970 non_lazy_plt = &elf_i386_non_lazy_plt;
4971 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4972 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4975 lazy_plt = &elf_i386_lazy_plt;
4978 lazy_plt = &elf_i386_nacl_plt;
4985 for (j = 0; plts[j].name != NULL; j++)
4987 plt = bfd_get_section_by_name (abfd, plts[j].name);
4988 if (plt == NULL || plt->size == 0)
4991 /* Get the PLT section contents. */
4992 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4993 if (plt_contents == NULL)
4995 if (!bfd_get_section_contents (abfd, (asection *) plt,
4996 plt_contents, 0, plt->size))
4998 free (plt_contents);
5002 /* Check what kind of PLT it is. */
5003 plt_type = plt_unknown;
5004 if (plts[j].type == plt_unknown
5005 && (plt->size >= (lazy_plt->plt0_entry_size
5006 + lazy_plt->plt_entry_size)))
5008 /* Match lazy PLT first. */
5009 if (memcmp (plt_contents, lazy_plt->plt0_entry,
5010 lazy_plt->plt0_got1_offset) == 0)
5012 /* The fist entry in the lazy IBT PLT is the same as the
5014 if (lazy_ibt_plt != NULL
5015 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
5016 lazy_ibt_plt->plt_entry,
5017 lazy_ibt_plt->plt_got_offset) == 0))
5018 plt_type = plt_lazy | plt_second;
5020 plt_type = plt_lazy;
5022 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
5023 lazy_plt->plt0_got1_offset) == 0)
5025 /* The fist entry in the PIC lazy IBT PLT is the same as
5026 the normal PIC lazy PLT. */
5027 if (lazy_ibt_plt != NULL
5028 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
5029 lazy_ibt_plt->pic_plt_entry,
5030 lazy_ibt_plt->plt_got_offset) == 0))
5031 plt_type = plt_lazy | plt_pic | plt_second;
5033 plt_type = plt_lazy | plt_pic;
5037 if (non_lazy_plt != NULL
5038 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
5039 && plt->size >= non_lazy_plt->plt_entry_size)
5041 /* Match non-lazy PLT. */
5042 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
5043 non_lazy_plt->plt_got_offset) == 0)
5044 plt_type = plt_non_lazy;
5045 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
5046 non_lazy_plt->plt_got_offset) == 0)
5050 if ((non_lazy_ibt_plt != NULL)
5051 && (plt_type == plt_unknown || plt_type == plt_second)
5052 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
5054 if (memcmp (plt_contents,
5055 non_lazy_ibt_plt->plt_entry,
5056 non_lazy_ibt_plt->plt_got_offset) == 0)
5058 /* Match IBT PLT. */
5059 plt_type = plt_second;
5060 non_lazy_plt = non_lazy_ibt_plt;
5062 else if (memcmp (plt_contents,
5063 non_lazy_ibt_plt->pic_plt_entry,
5064 non_lazy_ibt_plt->plt_got_offset) == 0)
5066 /* Match PIC IBT PLT. */
5067 plt_type = plt_second | plt_pic;
5068 non_lazy_plt = non_lazy_ibt_plt;
5072 if (plt_type == plt_unknown)
5074 free (plt_contents);
5079 plts[j].type = plt_type;
5081 if ((plt_type & plt_lazy))
5083 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
5084 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
5085 /* Skip PLT0 in lazy PLT. */
5090 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
5091 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
5095 /* Skip lazy PLT when the second PLT is used. */
5096 if ((plt_type & (plt_lazy | plt_second))
5097 == (plt_lazy | plt_second))
5101 n = plt->size / plts[j].plt_entry_size;
5106 plts[j].contents = plt_contents;
5108 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
5109 if ((plt_type & plt_pic))
5110 got_addr = (bfd_vma) -1;
5113 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
5114 got_addr, plts, dynsyms,
5118 /* Set up i386 GNU properties. Return the first relocatable ELF input
5119 with GNU properties if found. Otherwise, return NULL. */
5122 elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
5124 struct elf_x86_plt_layout_table plt_layout;
5126 plt_layout.normal_target = FALSE;
5127 plt_layout.is_vxworks = FALSE;
5128 switch (get_elf_i386_backend_data (info->output_bfd)->os)
5131 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5132 plt_layout.non_lazy_plt = &elf_i386_non_lazy_plt;
5133 plt_layout.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5134 plt_layout.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
5135 plt_layout.normal_target = TRUE;
5138 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5139 plt_layout.non_lazy_plt = NULL;
5140 plt_layout.lazy_ibt_plt = NULL;
5141 plt_layout.non_lazy_ibt_plt = NULL;
5142 plt_layout.is_vxworks = TRUE;
5145 plt_layout.lazy_plt = &elf_i386_nacl_plt;
5146 plt_layout.non_lazy_plt = NULL;
5147 plt_layout.lazy_ibt_plt = NULL;
5148 plt_layout.non_lazy_ibt_plt = NULL;
5152 return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout);
5155 #define TARGET_LITTLE_SYM i386_elf32_vec
5156 #define TARGET_LITTLE_NAME "elf32-i386"
5157 #define ELF_ARCH bfd_arch_i386
5158 #define ELF_TARGET_ID I386_ELF_DATA
5159 #define ELF_MACHINE_CODE EM_386
5160 #define ELF_MAXPAGESIZE 0x1000
5162 #define elf_backend_can_gc_sections 1
5163 #define elf_backend_can_refcount 1
5164 #define elf_backend_want_got_plt 1
5165 #define elf_backend_plt_readonly 1
5166 #define elf_backend_want_plt_sym 0
5167 #define elf_backend_got_header_size 12
5168 #define elf_backend_plt_alignment 4
5169 #define elf_backend_dtrel_excludes_plt 1
5170 #define elf_backend_extern_protected_data 1
5171 #define elf_backend_caches_rawsize 1
5172 #define elf_backend_want_dynrelro 1
5174 /* Support RELA for objdump of prelink objects. */
5175 #define elf_info_to_howto elf_i386_info_to_howto_rel
5176 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5178 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5179 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5180 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5181 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5183 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5184 #define elf_backend_check_relocs elf_i386_check_relocs
5185 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5186 #define elf_backend_fake_sections elf_i386_fake_sections
5187 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5188 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5189 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
5190 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5191 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5192 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5193 #define elf_backend_relocate_section elf_i386_relocate_section
5194 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5195 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
5197 #include "elf32-target.h"
5199 /* FreeBSD support. */
5201 #undef TARGET_LITTLE_SYM
5202 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5203 #undef TARGET_LITTLE_NAME
5204 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5206 #define ELF_OSABI ELFOSABI_FREEBSD
5208 /* The kernel recognizes executables as valid only if they carry a
5209 "FreeBSD" label in the ELF header. So we put this label on all
5210 executables and (for simplicity) also all other object files. */
5213 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5215 _bfd_elf_post_process_headers (abfd, info);
5217 #ifdef OLD_FREEBSD_ABI_LABEL
5219 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5220 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5221 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5226 #undef elf_backend_post_process_headers
5227 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5229 #define elf32_bed elf32_i386_fbsd_bed
5231 #undef elf_backend_add_symbol_hook
5233 #include "elf32-target.h"
5237 #undef TARGET_LITTLE_SYM
5238 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5239 #undef TARGET_LITTLE_NAME
5240 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5242 #undef elf_backend_post_process_headers
5244 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5245 objects won't be recognized. */
5249 #define elf32_bed elf32_i386_sol2_bed
5251 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5253 #undef elf_backend_static_tls_alignment
5254 #define elf_backend_static_tls_alignment 8
5256 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5258 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5260 #undef elf_backend_want_plt_sym
5261 #define elf_backend_want_plt_sym 1
5263 #undef elf_backend_strtab_flags
5264 #define elf_backend_strtab_flags SHF_STRINGS
5266 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
5267 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5268 FALSE otherwise. ISECTION is the best guess matching section from the
5269 input bfd IBFD, but it might be NULL. */
5272 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
5273 bfd *obfd ATTRIBUTE_UNUSED,
5274 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
5275 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
5277 /* PR 19938: FIXME: Need to add code for setting the sh_info
5278 and sh_link fields of Solaris specific section types. */
5281 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
5282 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
5284 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
5286 The following values should be set:
5289 -----------------------------------------------------------------------------
5290 SHT_SUNW_ancillary The section header index of 0
5291 [0x6fffffee] the associated string table.
5293 SHT_SUNW_capinfo The section header index of For a dynamic object, the
5294 [0x6ffffff0] the associated symbol table. section header index of
5296 SHT_SUNW_capchain table,
5299 SHT_SUNW_symsort The section header index of 0
5300 [0x6ffffff1] the associated symbol table.
5302 SHT_SUNW_tlssort The section header index of 0
5303 [0x6ffffff2] the associated symbol table.
5305 SHT_SUNW_LDYNSYM The section header index of One greater than the
5306 [0x6ffffff3] the associated string table. symbol table index of the
5307 This index is the same string last local symbol,
5308 table used by the SHT_DYNSYM STB_LOCAL. Since
5309 section. SHT_SUNW_LDYNSYM only
5310 contains local symbols,
5311 sh_info is equivalent to
5312 the number of symbols in
5315 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
5316 [0x6ffffff5] the section header index of to named strings, the
5317 the associated section header index of
5318 SHT_SUNW_capinfo table, the associated string
5319 otherwise 0. table, otherwise 0.
5321 SHT_SUNW_move The section header index of 0
5322 [0x6ffffffa] the associated symbol table.
5327 SHT_SUNW_syminfo The section header index of The section header index
5328 [0x6ffffffc] the associated symbol table. of the associated
5331 SHT_SUNW_verdef The section header index of The number of version
5332 [0x6ffffffd] the associated string table. definitions within the
5335 SHT_SUNW_verneed The section header index of The number of version
5336 [0x6ffffffe] the associated string table. dependencies within the
5339 SHT_SUNW_versym The section header index of 0
5340 [0x6fffffff] the associated symbol table. */
5343 #undef elf_backend_copy_special_section_fields
5344 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
5346 #include "elf32-target.h"
5348 /* Intel MCU support. */
5351 elf32_iamcu_elf_object_p (bfd *abfd)
5353 /* Set the right machine number for an IAMCU elf32 file. */
5354 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5358 #undef TARGET_LITTLE_SYM
5359 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5360 #undef TARGET_LITTLE_NAME
5361 #define TARGET_LITTLE_NAME "elf32-iamcu"
5363 #define ELF_ARCH bfd_arch_iamcu
5365 #undef ELF_MACHINE_CODE
5366 #define ELF_MACHINE_CODE EM_IAMCU
5371 #define elf32_bed elf32_iamcu_bed
5373 #undef elf_backend_object_p
5374 #define elf_backend_object_p elf32_iamcu_elf_object_p
5376 #undef elf_backend_static_tls_alignment
5378 #undef elf_backend_want_plt_sym
5379 #define elf_backend_want_plt_sym 0
5381 #undef elf_backend_strtab_flags
5382 #undef elf_backend_copy_special_section_fields
5384 #include "elf32-target.h"
5386 /* Restore defaults. */
5388 #define ELF_ARCH bfd_arch_i386
5389 #undef ELF_MACHINE_CODE
5390 #define ELF_MACHINE_CODE EM_386
5392 /* Native Client support. */
5394 #undef TARGET_LITTLE_SYM
5395 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5396 #undef TARGET_LITTLE_NAME
5397 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5399 #define elf32_bed elf32_i386_nacl_bed
5401 #undef ELF_MAXPAGESIZE
5402 #define ELF_MAXPAGESIZE 0x10000
5404 /* Restore defaults. */
5406 #undef elf_backend_want_plt_sym
5407 #define elf_backend_want_plt_sym 0
5408 #undef elf_backend_post_process_headers
5409 #undef elf_backend_static_tls_alignment
5411 /* NaCl uses substantially different PLT entries for the same effects. */
5413 #undef elf_backend_plt_alignment
5414 #define elf_backend_plt_alignment 5
5415 #define NACL_PLT_ENTRY_SIZE 64
5416 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5418 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5420 0xff, 0x35, /* pushl contents of address */
5421 0, 0, 0, 0, /* replaced with address of .got + 4. */
5422 0x8b, 0x0d, /* movl contents of address, %ecx */
5423 0, 0, 0, 0, /* replaced with address of .got + 8. */
5424 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5425 0xff, 0xe1 /* jmp *%ecx */
5428 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5430 0x8b, 0x0d, /* movl contents of address, %ecx */
5431 0, 0, 0, 0, /* replaced with GOT slot address. */
5432 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5433 0xff, 0xe1, /* jmp *%ecx */
5435 /* Pad to the next 32-byte boundary with nop instructions. */
5437 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5438 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5440 /* Lazy GOT entries point here (32-byte aligned). */
5441 0x68, /* pushl immediate */
5442 0, 0, 0, 0, /* replaced with reloc offset. */
5443 0xe9, /* jmp relative */
5444 0, 0, 0, 0, /* replaced with offset to .plt. */
5446 /* Pad to the next 32-byte boundary with nop instructions. */
5447 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5448 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5452 static const bfd_byte
5453 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5455 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5456 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5457 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5458 0xff, 0xe1, /* jmp *%ecx */
5460 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5461 so pad to that size with nop instructions. */
5462 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5465 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5467 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5468 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5469 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5470 0xff, 0xe1, /* jmp *%ecx */
5472 /* Pad to the next 32-byte boundary with nop instructions. */
5474 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5475 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5477 /* Lazy GOT entries point here (32-byte aligned). */
5478 0x68, /* pushl immediate */
5479 0, 0, 0, 0, /* replaced with offset into relocation table. */
5480 0xe9, /* jmp relative */
5481 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5483 /* Pad to the next 32-byte boundary with nop instructions. */
5484 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5485 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5489 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5491 #if (PLT_CIE_LENGTH != 20 \
5492 || PLT_FDE_LENGTH != 36 \
5493 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5494 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5495 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5497 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5498 0, 0, 0, 0, /* CIE ID */
5499 1, /* CIE version */
5500 'z', 'R', 0, /* Augmentation string */
5501 1, /* Code alignment factor */
5502 0x7c, /* Data alignment factor: -4 */
5503 8, /* Return address column */
5504 1, /* Augmentation size */
5505 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5506 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5507 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5508 DW_CFA_nop, DW_CFA_nop,
5510 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5511 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5512 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5513 0, 0, 0, 0, /* .plt size goes here */
5514 0, /* Augmentation size */
5515 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5516 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5517 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5518 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5519 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5520 13, /* Block length */
5521 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5522 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5523 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5524 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5525 DW_CFA_nop, DW_CFA_nop
5528 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
5530 elf_i386_nacl_plt0_entry, /* plt0_entry */
5531 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5532 elf_i386_nacl_plt_entry, /* plt_entry */
5533 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5534 2, /* plt0_got1_offset */
5535 8, /* plt0_got2_offset */
5536 0, /* plt0_got2_insn_end */
5537 2, /* plt_got_offset */
5538 33, /* plt_reloc_offset */
5539 38, /* plt_plt_offset */
5540 0, /* plt_got_insn_size */
5541 0, /* plt_plt_insn_end */
5542 32, /* plt_lazy_offset */
5543 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5544 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5545 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5546 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
5549 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5551 0x90, /* plt0_pad_byte: nop insn */
5556 elf32_i386_nacl_elf_object_p (bfd *abfd)
5558 /* Set the right machine number for a NaCl i386 ELF32 file. */
5559 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
5563 #undef elf_backend_arch_data
5564 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5566 #undef elf_backend_object_p
5567 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5568 #undef elf_backend_modify_segment_map
5569 #define elf_backend_modify_segment_map nacl_modify_segment_map
5570 #undef elf_backend_modify_program_headers
5571 #define elf_backend_modify_program_headers nacl_modify_program_headers
5572 #undef elf_backend_final_write_processing
5573 #define elf_backend_final_write_processing nacl_final_write_processing
5575 #include "elf32-target.h"
5577 /* Restore defaults. */
5578 #undef elf_backend_object_p
5579 #undef elf_backend_modify_segment_map
5580 #undef elf_backend_modify_program_headers
5581 #undef elf_backend_final_write_processing
5583 /* VxWorks support. */
5585 #undef TARGET_LITTLE_SYM
5586 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5587 #undef TARGET_LITTLE_NAME
5588 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5590 #undef ELF_MAXPAGESIZE
5591 #define ELF_MAXPAGESIZE 0x1000
5592 #undef elf_backend_plt_alignment
5593 #define elf_backend_plt_alignment 4
5595 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5597 0x90, /* plt0_pad_byte */
5601 #undef elf_backend_arch_data
5602 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5604 #undef elf_backend_relocs_compatible
5605 #undef elf_backend_add_symbol_hook
5606 #define elf_backend_add_symbol_hook \
5607 elf_vxworks_add_symbol_hook
5608 #undef elf_backend_link_output_symbol_hook
5609 #define elf_backend_link_output_symbol_hook \
5610 elf_vxworks_link_output_symbol_hook
5611 #undef elf_backend_emit_relocs
5612 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5613 #undef elf_backend_final_write_processing
5614 #define elf_backend_final_write_processing \
5615 elf_vxworks_final_write_processing
5616 #undef elf_backend_static_tls_alignment
5618 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5620 #undef elf_backend_want_plt_sym
5621 #define elf_backend_want_plt_sym 1
5624 #define elf32_bed elf32_i386_vxworks_bed
5626 #include "elf32-target.h"