1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2014 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. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
33 /* 386 uses REL relocations instead of RELA. */
38 static reloc_howto_type elf_howto_table[]=
40 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
41 bfd_elf_generic_reloc, "R_386_NONE",
42 TRUE, 0x00000000, 0x00000000, FALSE),
43 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
44 bfd_elf_generic_reloc, "R_386_32",
45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
47 bfd_elf_generic_reloc, "R_386_PC32",
48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
50 bfd_elf_generic_reloc, "R_386_GOT32",
51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
53 bfd_elf_generic_reloc, "R_386_PLT32",
54 TRUE, 0xffffffff, 0xffffffff, TRUE),
55 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_386_COPY",
57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_386_RELATIVE",
66 TRUE, 0xffffffff, 0xffffffff, FALSE),
67 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_386_GOTOFF",
69 TRUE, 0xffffffff, 0xffffffff, FALSE),
70 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_386_GOTPC",
72 TRUE, 0xffffffff, 0xffffffff, TRUE),
74 /* We have a gap in the reloc numbers here.
75 R_386_standard counts the number up to this point, and
76 R_386_ext_offset is the value to subtract from a reloc type of
77 R_386_16 thru R_386_PC8 to form an index into this table. */
78 #define R_386_standard (R_386_GOTPC + 1)
79 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
81 /* These relocs are a GNU extension. */
82 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_386_TLS_IE",
87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_386_TLS_LE",
93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_386_TLS_GD",
96 TRUE, 0xffffffff, 0xffffffff, FALSE),
97 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_386_TLS_LDM",
99 TRUE, 0xffffffff, 0xffffffff, FALSE),
100 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_386_16",
102 TRUE, 0xffff, 0xffff, FALSE),
103 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_386_PC16",
105 TRUE, 0xffff, 0xffff, TRUE),
106 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_386_8",
108 TRUE, 0xff, 0xff, FALSE),
109 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
110 bfd_elf_generic_reloc, "R_386_PC8",
111 TRUE, 0xff, 0xff, TRUE),
113 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
114 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
115 /* These are common with Solaris TLS implementation. */
116 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
127 TRUE, 0xffffffff, 0xffffffff, FALSE),
128 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
131 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
133 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
135 bfd_elf_generic_reloc, "R_386_SIZE32",
136 TRUE, 0xffffffff, 0xffffffff, FALSE),
137 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
140 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
143 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_TLS_DESC",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
146 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_386_IRELATIVE",
148 TRUE, 0xffffffff, 0xffffffff, FALSE),
151 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
152 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
154 /* GNU extension to record C++ vtable hierarchy. */
155 HOWTO (R_386_GNU_VTINHERIT, /* type */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
159 FALSE, /* pc_relative */
161 complain_overflow_dont, /* complain_on_overflow */
162 NULL, /* special_function */
163 "R_386_GNU_VTINHERIT", /* name */
164 FALSE, /* partial_inplace */
167 FALSE), /* pcrel_offset */
169 /* GNU extension to record C++ vtable member usage. */
170 HOWTO (R_386_GNU_VTENTRY, /* type */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
174 FALSE, /* pc_relative */
176 complain_overflow_dont, /* complain_on_overflow */
177 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
178 "R_386_GNU_VTENTRY", /* name */
179 FALSE, /* partial_inplace */
182 FALSE) /* pcrel_offset */
184 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
188 #ifdef DEBUG_GEN_RELOC
190 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
195 static reloc_howto_type *
196 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
197 bfd_reloc_code_real_type code)
202 TRACE ("BFD_RELOC_NONE");
203 return &elf_howto_table[R_386_NONE];
206 TRACE ("BFD_RELOC_32");
207 return &elf_howto_table[R_386_32];
210 TRACE ("BFD_RELOC_CTOR");
211 return &elf_howto_table[R_386_32];
213 case BFD_RELOC_32_PCREL:
214 TRACE ("BFD_RELOC_PC32");
215 return &elf_howto_table[R_386_PC32];
217 case BFD_RELOC_386_GOT32:
218 TRACE ("BFD_RELOC_386_GOT32");
219 return &elf_howto_table[R_386_GOT32];
221 case BFD_RELOC_386_PLT32:
222 TRACE ("BFD_RELOC_386_PLT32");
223 return &elf_howto_table[R_386_PLT32];
225 case BFD_RELOC_386_COPY:
226 TRACE ("BFD_RELOC_386_COPY");
227 return &elf_howto_table[R_386_COPY];
229 case BFD_RELOC_386_GLOB_DAT:
230 TRACE ("BFD_RELOC_386_GLOB_DAT");
231 return &elf_howto_table[R_386_GLOB_DAT];
233 case BFD_RELOC_386_JUMP_SLOT:
234 TRACE ("BFD_RELOC_386_JUMP_SLOT");
235 return &elf_howto_table[R_386_JUMP_SLOT];
237 case BFD_RELOC_386_RELATIVE:
238 TRACE ("BFD_RELOC_386_RELATIVE");
239 return &elf_howto_table[R_386_RELATIVE];
241 case BFD_RELOC_386_GOTOFF:
242 TRACE ("BFD_RELOC_386_GOTOFF");
243 return &elf_howto_table[R_386_GOTOFF];
245 case BFD_RELOC_386_GOTPC:
246 TRACE ("BFD_RELOC_386_GOTPC");
247 return &elf_howto_table[R_386_GOTPC];
249 /* These relocs are a GNU extension. */
250 case BFD_RELOC_386_TLS_TPOFF:
251 TRACE ("BFD_RELOC_386_TLS_TPOFF");
252 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
254 case BFD_RELOC_386_TLS_IE:
255 TRACE ("BFD_RELOC_386_TLS_IE");
256 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
258 case BFD_RELOC_386_TLS_GOTIE:
259 TRACE ("BFD_RELOC_386_TLS_GOTIE");
260 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
262 case BFD_RELOC_386_TLS_LE:
263 TRACE ("BFD_RELOC_386_TLS_LE");
264 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
266 case BFD_RELOC_386_TLS_GD:
267 TRACE ("BFD_RELOC_386_TLS_GD");
268 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
270 case BFD_RELOC_386_TLS_LDM:
271 TRACE ("BFD_RELOC_386_TLS_LDM");
272 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
275 TRACE ("BFD_RELOC_16");
276 return &elf_howto_table[R_386_16 - R_386_ext_offset];
278 case BFD_RELOC_16_PCREL:
279 TRACE ("BFD_RELOC_16_PCREL");
280 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
283 TRACE ("BFD_RELOC_8");
284 return &elf_howto_table[R_386_8 - R_386_ext_offset];
286 case BFD_RELOC_8_PCREL:
287 TRACE ("BFD_RELOC_8_PCREL");
288 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
290 /* Common with Sun TLS implementation. */
291 case BFD_RELOC_386_TLS_LDO_32:
292 TRACE ("BFD_RELOC_386_TLS_LDO_32");
293 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
295 case BFD_RELOC_386_TLS_IE_32:
296 TRACE ("BFD_RELOC_386_TLS_IE_32");
297 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
299 case BFD_RELOC_386_TLS_LE_32:
300 TRACE ("BFD_RELOC_386_TLS_LE_32");
301 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
303 case BFD_RELOC_386_TLS_DTPMOD32:
304 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
305 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
307 case BFD_RELOC_386_TLS_DTPOFF32:
308 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
309 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
311 case BFD_RELOC_386_TLS_TPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
313 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
315 case BFD_RELOC_SIZE32:
316 TRACE ("BFD_RELOC_SIZE32");
317 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
319 case BFD_RELOC_386_TLS_GOTDESC:
320 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
321 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
323 case BFD_RELOC_386_TLS_DESC_CALL:
324 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
325 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
327 case BFD_RELOC_386_TLS_DESC:
328 TRACE ("BFD_RELOC_386_TLS_DESC");
329 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
331 case BFD_RELOC_386_IRELATIVE:
332 TRACE ("BFD_RELOC_386_IRELATIVE");
333 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
335 case BFD_RELOC_VTABLE_INHERIT:
336 TRACE ("BFD_RELOC_VTABLE_INHERIT");
337 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
339 case BFD_RELOC_VTABLE_ENTRY:
340 TRACE ("BFD_RELOC_VTABLE_ENTRY");
341 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
351 static reloc_howto_type *
352 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
357 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
358 if (elf_howto_table[i].name != NULL
359 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
360 return &elf_howto_table[i];
365 static reloc_howto_type *
366 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
370 if ((indx = r_type) >= R_386_standard
371 && ((indx = r_type - R_386_ext_offset) - R_386_standard
372 >= R_386_ext - R_386_standard)
373 && ((indx = r_type - R_386_tls_offset) - R_386_ext
374 >= R_386_irelative - R_386_ext)
375 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
376 >= R_386_vt - R_386_irelative))
378 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
382 BFD_ASSERT (elf_howto_table [indx].type == r_type);
383 return &elf_howto_table[indx];
387 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
389 Elf_Internal_Rela *dst)
391 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
392 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
395 /* Return whether a symbol name implies a local label. The UnixWare
396 2.1 cc generates temporary symbols that start with .X, so we
397 recognize them here. FIXME: do other SVR4 compilers also use .X?.
398 If so, we should move the .X recognition into
399 _bfd_elf_is_local_label_name. */
402 elf_i386_is_local_label_name (bfd *abfd, const char *name)
404 if (name[0] == '.' && name[1] == 'X')
407 return _bfd_elf_is_local_label_name (abfd, name);
410 /* Support for core dump NOTE sections. */
413 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
418 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
420 int pr_version = bfd_get_32 (abfd, note->descdata);
426 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
429 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
433 size = bfd_get_32 (abfd, note->descdata + 8);
437 switch (note->descsz)
442 case 144: /* Linux/i386 */
444 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
447 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
457 /* Make a ".reg/999" section. */
458 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
459 size, note->descpos + offset);
463 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
465 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
467 int pr_version = bfd_get_32 (abfd, note->descdata);
472 elf_tdata (abfd)->core->program
473 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
474 elf_tdata (abfd)->core->command
475 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
479 switch (note->descsz)
484 case 124: /* Linux/i386 elf_prpsinfo. */
485 elf_tdata (abfd)->core->pid
486 = bfd_get_32 (abfd, note->descdata + 12);
487 elf_tdata (abfd)->core->program
488 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
489 elf_tdata (abfd)->core->command
490 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
494 /* Note that for some reason, a spurious space is tacked
495 onto the end of the args in some (at least one anyway)
496 implementations, so strip it off if it exists. */
498 char *command = elf_tdata (abfd)->core->command;
499 int n = strlen (command);
501 if (0 < n && command[n - 1] == ' ')
502 command[n - 1] = '\0';
508 /* Functions for the i386 ELF linker.
510 In order to gain some understanding of code in this file without
511 knowing all the intricate details of the linker, note the
514 Functions named elf_i386_* are called by external routines, other
515 functions are only called locally. elf_i386_* functions appear
516 in this file more or less in the order in which they are called
517 from external routines. eg. elf_i386_check_relocs is called
518 early in the link process, elf_i386_finish_dynamic_sections is
519 one of the last functions. */
522 /* The name of the dynamic interpreter. This is put in the .interp
525 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
527 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
528 copying dynamic variables from a shared lib into an app's dynbss
529 section, and instead use a dynamic relocation to point into the
531 #define ELIMINATE_COPY_RELOCS 1
533 /* The size in bytes of an entry in the procedure linkage table. */
535 #define PLT_ENTRY_SIZE 16
537 /* The first entry in an absolute procedure linkage table looks like
538 this. See the SVR4 ABI i386 supplement to see how this works.
539 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
541 static const bfd_byte elf_i386_plt0_entry[12] =
543 0xff, 0x35, /* pushl contents of address */
544 0, 0, 0, 0, /* replaced with address of .got + 4. */
545 0xff, 0x25, /* jmp indirect */
546 0, 0, 0, 0 /* replaced with address of .got + 8. */
549 /* Subsequent entries in an absolute procedure linkage table look like
552 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
554 0xff, 0x25, /* jmp indirect */
555 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
556 0x68, /* pushl immediate */
557 0, 0, 0, 0, /* replaced with offset into relocation table. */
558 0xe9, /* jmp relative */
559 0, 0, 0, 0 /* replaced with offset to start of .plt. */
562 /* The first entry in a PIC procedure linkage table look like this.
563 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
565 static const bfd_byte elf_i386_pic_plt0_entry[12] =
567 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
568 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
571 /* Subsequent entries in a PIC procedure linkage table look like this. */
573 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
575 0xff, 0xa3, /* jmp *offset(%ebx) */
576 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
577 0x68, /* pushl immediate */
578 0, 0, 0, 0, /* replaced with offset into relocation table. */
579 0xe9, /* jmp relative */
580 0, 0, 0, 0 /* replaced with offset to start of .plt. */
583 /* .eh_frame covering the .plt section. */
585 static const bfd_byte elf_i386_eh_frame_plt[] =
587 #define PLT_CIE_LENGTH 20
588 #define PLT_FDE_LENGTH 36
589 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
590 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
591 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
592 0, 0, 0, 0, /* CIE ID */
594 'z', 'R', 0, /* Augmentation string */
595 1, /* Code alignment factor */
596 0x7c, /* Data alignment factor */
597 8, /* Return address column */
598 1, /* Augmentation size */
599 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
600 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
601 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
602 DW_CFA_nop, DW_CFA_nop,
604 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
605 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
606 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
607 0, 0, 0, 0, /* .plt size goes here */
608 0, /* Augmentation size */
609 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
610 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
611 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
612 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
613 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
614 11, /* Block length */
615 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
616 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
617 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
618 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
619 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
622 struct elf_i386_plt_layout
624 /* The first entry in an absolute procedure linkage table looks like this. */
625 const bfd_byte *plt0_entry;
626 unsigned int plt0_entry_size;
628 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
629 unsigned int plt0_got1_offset;
630 unsigned int plt0_got2_offset;
632 /* Later entries in an absolute procedure linkage table look like this. */
633 const bfd_byte *plt_entry;
634 unsigned int plt_entry_size;
636 /* Offsets into plt_entry that are to be replaced with... */
637 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
638 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
639 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
641 /* Offset into plt_entry where the initial value of the GOT entry points. */
642 unsigned int plt_lazy_offset;
644 /* The first entry in a PIC procedure linkage table looks like this. */
645 const bfd_byte *pic_plt0_entry;
647 /* Subsequent entries in a PIC procedure linkage table look like this. */
648 const bfd_byte *pic_plt_entry;
650 /* .eh_frame covering the .plt section. */
651 const bfd_byte *eh_frame_plt;
652 unsigned int eh_frame_plt_size;
655 #define GET_PLT_ENTRY_SIZE(abfd) \
656 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
658 /* These are the standard parameters. */
659 static const struct elf_i386_plt_layout elf_i386_plt =
661 elf_i386_plt0_entry, /* plt0_entry */
662 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
663 2, /* plt0_got1_offset */
664 8, /* plt0_got2_offset */
665 elf_i386_plt_entry, /* plt_entry */
666 PLT_ENTRY_SIZE, /* plt_entry_size */
667 2, /* plt_got_offset */
668 7, /* plt_reloc_offset */
669 12, /* plt_plt_offset */
670 6, /* plt_lazy_offset */
671 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
672 elf_i386_pic_plt_entry, /* pic_plt_entry */
673 elf_i386_eh_frame_plt, /* eh_frame_plt */
674 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
678 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
679 for the PLTResolve stub and then for each PLT entry. */
680 #define PLTRESOLVE_RELOCS_SHLIB 0
681 #define PLTRESOLVE_RELOCS 2
682 #define PLT_NON_JUMP_SLOT_RELOCS 2
684 /* Architecture-specific backend data for i386. */
686 struct elf_i386_backend_data
688 /* Parameters describing PLT generation. */
689 const struct elf_i386_plt_layout *plt;
691 /* Value used to fill the unused bytes of the first PLT entry. */
692 bfd_byte plt0_pad_byte;
694 /* True if the target system is VxWorks. */
698 #define get_elf_i386_backend_data(abfd) \
699 ((const struct elf_i386_backend_data *) \
700 get_elf_backend_data (abfd)->arch_data)
702 /* These are the standard parameters. */
703 static const struct elf_i386_backend_data elf_i386_arch_bed =
705 &elf_i386_plt, /* plt */
706 0, /* plt0_pad_byte */
710 #define elf_backend_arch_data &elf_i386_arch_bed
712 /* i386 ELF linker hash entry. */
714 struct elf_i386_link_hash_entry
716 struct elf_link_hash_entry elf;
718 /* Track dynamic relocs copied for this symbol. */
719 struct elf_dyn_relocs *dyn_relocs;
721 #define GOT_UNKNOWN 0
725 #define GOT_TLS_IE_POS 5
726 #define GOT_TLS_IE_NEG 6
727 #define GOT_TLS_IE_BOTH 7
728 #define GOT_TLS_GDESC 8
729 #define GOT_TLS_GD_BOTH_P(type) \
730 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
731 #define GOT_TLS_GD_P(type) \
732 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
733 #define GOT_TLS_GDESC_P(type) \
734 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
735 #define GOT_TLS_GD_ANY_P(type) \
736 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
737 unsigned char tls_type;
739 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
740 starting at the end of the jump table. */
744 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
746 struct elf_i386_obj_tdata
748 struct elf_obj_tdata root;
750 /* tls_type for each local got entry. */
751 char *local_got_tls_type;
753 /* GOTPLT entries for TLS descriptors. */
754 bfd_vma *local_tlsdesc_gotent;
757 #define elf_i386_tdata(abfd) \
758 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
760 #define elf_i386_local_got_tls_type(abfd) \
761 (elf_i386_tdata (abfd)->local_got_tls_type)
763 #define elf_i386_local_tlsdesc_gotent(abfd) \
764 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
766 #define is_i386_elf(bfd) \
767 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
768 && elf_tdata (bfd) != NULL \
769 && elf_object_id (bfd) == I386_ELF_DATA)
772 elf_i386_mkobject (bfd *abfd)
774 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
778 /* i386 ELF linker hash table. */
780 struct elf_i386_link_hash_table
782 struct elf_link_hash_table elf;
784 /* Short-cuts to get to dynamic linker sections. */
787 asection *plt_eh_frame;
791 bfd_signed_vma refcount;
795 /* The amount of space used by the reserved portion of the sgotplt
796 section, plus whatever space is used by the jump slots. */
797 bfd_vma sgotplt_jump_table_size;
799 /* Small local sym cache. */
800 struct sym_cache sym_cache;
802 /* _TLS_MODULE_BASE_ symbol. */
803 struct bfd_link_hash_entry *tls_module_base;
805 /* Used by local STT_GNU_IFUNC symbols. */
806 htab_t loc_hash_table;
807 void * loc_hash_memory;
809 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
812 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
813 bfd_vma next_tls_desc_index;
815 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
816 bfd_vma next_jump_slot_index;
818 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
819 bfd_vma next_irelative_index;
822 /* Get the i386 ELF linker hash table from a link_info structure. */
824 #define elf_i386_hash_table(p) \
825 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
826 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
828 #define elf_i386_compute_jump_table_size(htab) \
829 ((htab)->next_tls_desc_index * 4)
831 /* Create an entry in an i386 ELF linker hash table. */
833 static struct bfd_hash_entry *
834 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
835 struct bfd_hash_table *table,
838 /* Allocate the structure if it has not already been allocated by a
842 entry = (struct bfd_hash_entry *)
843 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
848 /* Call the allocation method of the superclass. */
849 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
852 struct elf_i386_link_hash_entry *eh;
854 eh = (struct elf_i386_link_hash_entry *) entry;
855 eh->dyn_relocs = NULL;
856 eh->tls_type = GOT_UNKNOWN;
857 eh->tlsdesc_got = (bfd_vma) -1;
863 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
864 for local symbol so that we can handle local STT_GNU_IFUNC symbols
865 as global symbol. We reuse indx and dynstr_index for local symbol
866 hash since they aren't used by global symbols in this backend. */
869 elf_i386_local_htab_hash (const void *ptr)
871 struct elf_link_hash_entry *h
872 = (struct elf_link_hash_entry *) ptr;
873 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
876 /* Compare local hash entries. */
879 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
881 struct elf_link_hash_entry *h1
882 = (struct elf_link_hash_entry *) ptr1;
883 struct elf_link_hash_entry *h2
884 = (struct elf_link_hash_entry *) ptr2;
886 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
889 /* Find and/or create a hash entry for local symbol. */
891 static struct elf_link_hash_entry *
892 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
893 bfd *abfd, const Elf_Internal_Rela *rel,
896 struct elf_i386_link_hash_entry e, *ret;
897 asection *sec = abfd->sections;
898 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
899 ELF32_R_SYM (rel->r_info));
902 e.elf.indx = sec->id;
903 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
904 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
905 create ? INSERT : NO_INSERT);
912 ret = (struct elf_i386_link_hash_entry *) *slot;
916 ret = (struct elf_i386_link_hash_entry *)
917 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
918 sizeof (struct elf_i386_link_hash_entry));
921 memset (ret, 0, sizeof (*ret));
922 ret->elf.indx = sec->id;
923 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
924 ret->elf.dynindx = -1;
930 /* Create an i386 ELF linker hash table. */
932 static struct bfd_link_hash_table *
933 elf_i386_link_hash_table_create (bfd *abfd)
935 struct elf_i386_link_hash_table *ret;
936 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
938 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
942 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
943 elf_i386_link_hash_newfunc,
944 sizeof (struct elf_i386_link_hash_entry),
951 ret->loc_hash_table = htab_try_create (1024,
952 elf_i386_local_htab_hash,
953 elf_i386_local_htab_eq,
955 ret->loc_hash_memory = objalloc_create ();
956 if (!ret->loc_hash_table || !ret->loc_hash_memory)
962 return &ret->elf.root;
965 /* Destroy an i386 ELF linker hash table. */
968 elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash)
970 struct elf_i386_link_hash_table *htab
971 = (struct elf_i386_link_hash_table *) hash;
973 if (htab->loc_hash_table)
974 htab_delete (htab->loc_hash_table);
975 if (htab->loc_hash_memory)
976 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
977 _bfd_elf_link_hash_table_free (hash);
980 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
981 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
985 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
987 struct elf_i386_link_hash_table *htab;
989 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
992 htab = elf_i386_hash_table (info);
996 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
998 htab->srelbss = bfd_get_linker_section (dynobj, ".rel.bss");
1001 || (!info->shared && !htab->srelbss))
1004 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1005 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1009 if (!info->no_ld_generated_unwind_info
1010 && htab->plt_eh_frame == NULL
1011 && htab->elf.splt != NULL)
1013 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1014 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1015 | SEC_LINKER_CREATED);
1017 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1018 if (htab->plt_eh_frame == NULL
1019 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1026 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1029 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1030 struct elf_link_hash_entry *dir,
1031 struct elf_link_hash_entry *ind)
1033 struct elf_i386_link_hash_entry *edir, *eind;
1035 edir = (struct elf_i386_link_hash_entry *) dir;
1036 eind = (struct elf_i386_link_hash_entry *) ind;
1038 if (eind->dyn_relocs != NULL)
1040 if (edir->dyn_relocs != NULL)
1042 struct elf_dyn_relocs **pp;
1043 struct elf_dyn_relocs *p;
1045 /* Add reloc counts against the indirect sym to the direct sym
1046 list. Merge any entries against the same section. */
1047 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1049 struct elf_dyn_relocs *q;
1051 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1052 if (q->sec == p->sec)
1054 q->pc_count += p->pc_count;
1055 q->count += p->count;
1062 *pp = edir->dyn_relocs;
1065 edir->dyn_relocs = eind->dyn_relocs;
1066 eind->dyn_relocs = NULL;
1069 if (ind->root.type == bfd_link_hash_indirect
1070 && dir->got.refcount <= 0)
1072 edir->tls_type = eind->tls_type;
1073 eind->tls_type = GOT_UNKNOWN;
1076 if (ELIMINATE_COPY_RELOCS
1077 && ind->root.type != bfd_link_hash_indirect
1078 && dir->dynamic_adjusted)
1080 /* If called to transfer flags for a weakdef during processing
1081 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1082 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1083 dir->ref_dynamic |= ind->ref_dynamic;
1084 dir->ref_regular |= ind->ref_regular;
1085 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1086 dir->needs_plt |= ind->needs_plt;
1087 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1090 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1093 /* Return TRUE if the TLS access code sequence support transition
1097 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1099 Elf_Internal_Shdr *symtab_hdr,
1100 struct elf_link_hash_entry **sym_hashes,
1101 unsigned int r_type,
1102 const Elf_Internal_Rela *rel,
1103 const Elf_Internal_Rela *relend)
1105 unsigned int val, type;
1106 unsigned long r_symndx;
1107 struct elf_link_hash_entry *h;
1110 /* Get the section contents. */
1111 if (contents == NULL)
1113 if (elf_section_data (sec)->this_hdr.contents != NULL)
1114 contents = elf_section_data (sec)->this_hdr.contents;
1117 /* FIXME: How to better handle error condition? */
1118 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1121 /* Cache the section contents for elf_link_input_bfd. */
1122 elf_section_data (sec)->this_hdr.contents = contents;
1126 offset = rel->r_offset;
1131 if (offset < 2 || (rel + 1) >= relend)
1134 type = bfd_get_8 (abfd, contents + offset - 2);
1135 if (r_type == R_386_TLS_GD)
1137 /* Check transition from GD access model. Only
1138 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1139 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1140 can transit to different access model. */
1141 if ((offset + 10) > sec->size ||
1142 (type != 0x8d && type != 0x04))
1145 val = bfd_get_8 (abfd, contents + offset - 1);
1148 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1152 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1155 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1160 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1161 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1164 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1170 /* Check transition from LD access model. Only
1171 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1172 can transit to different access model. */
1173 if (type != 0x8d || (offset + 9) > sec->size)
1176 val = bfd_get_8 (abfd, contents + offset - 1);
1177 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1181 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1184 r_symndx = ELF32_R_SYM (rel[1].r_info);
1185 if (r_symndx < symtab_hdr->sh_info)
1188 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1189 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1190 may be versioned. */
1192 && h->root.root.string != NULL
1193 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1194 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1195 && (strncmp (h->root.root.string, "___tls_get_addr",
1199 /* Check transition from IE access model:
1200 movl foo@indntpoff(%rip), %eax
1201 movl foo@indntpoff(%rip), %reg
1202 addl foo@indntpoff(%rip), %reg
1205 if (offset < 1 || (offset + 4) > sec->size)
1208 /* Check "movl foo@tpoff(%rip), %eax" first. */
1209 val = bfd_get_8 (abfd, contents + offset - 1);
1216 /* Check movl|addl foo@tpoff(%rip), %reg. */
1217 type = bfd_get_8 (abfd, contents + offset - 2);
1218 return ((type == 0x8b || type == 0x03)
1219 && (val & 0xc7) == 0x05);
1221 case R_386_TLS_GOTIE:
1222 case R_386_TLS_IE_32:
1223 /* Check transition from {IE_32,GOTIE} access model:
1224 subl foo@{tpoff,gontoff}(%reg1), %reg2
1225 movl foo@{tpoff,gontoff}(%reg1), %reg2
1226 addl foo@{tpoff,gontoff}(%reg1), %reg2
1229 if (offset < 2 || (offset + 4) > sec->size)
1232 val = bfd_get_8 (abfd, contents + offset - 1);
1233 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1236 type = bfd_get_8 (abfd, contents + offset - 2);
1237 return type == 0x8b || type == 0x2b || type == 0x03;
1239 case R_386_TLS_GOTDESC:
1240 /* Check transition from GDesc access model:
1241 leal x@tlsdesc(%ebx), %eax
1243 Make sure it's a leal adding ebx to a 32-bit offset
1244 into any register, although it's probably almost always
1247 if (offset < 2 || (offset + 4) > sec->size)
1250 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1253 val = bfd_get_8 (abfd, contents + offset - 1);
1254 return (val & 0xc7) == 0x83;
1256 case R_386_TLS_DESC_CALL:
1257 /* Check transition from GDesc access model:
1258 call *x@tlsdesc(%rax)
1260 if (offset + 2 <= sec->size)
1262 /* Make sure that it's a call *x@tlsdesc(%rax). */
1263 static const unsigned char call[] = { 0xff, 0x10 };
1264 return memcmp (contents + offset, call, 2) == 0;
1274 /* Return TRUE if the TLS access transition is OK or no transition
1275 will be performed. Update R_TYPE if there is a transition. */
1278 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1279 asection *sec, bfd_byte *contents,
1280 Elf_Internal_Shdr *symtab_hdr,
1281 struct elf_link_hash_entry **sym_hashes,
1282 unsigned int *r_type, int tls_type,
1283 const Elf_Internal_Rela *rel,
1284 const Elf_Internal_Rela *relend,
1285 struct elf_link_hash_entry *h,
1286 unsigned long r_symndx)
1288 unsigned int from_type = *r_type;
1289 unsigned int to_type = from_type;
1290 bfd_boolean check = TRUE;
1292 /* Skip TLS transition for functions. */
1294 && (h->type == STT_FUNC
1295 || h->type == STT_GNU_IFUNC))
1301 case R_386_TLS_GOTDESC:
1302 case R_386_TLS_DESC_CALL:
1303 case R_386_TLS_IE_32:
1305 case R_386_TLS_GOTIE:
1306 if (info->executable)
1309 to_type = R_386_TLS_LE_32;
1310 else if (from_type != R_386_TLS_IE
1311 && from_type != R_386_TLS_GOTIE)
1312 to_type = R_386_TLS_IE_32;
1315 /* When we are called from elf_i386_relocate_section, CONTENTS
1316 isn't NULL and there may be additional transitions based on
1318 if (contents != NULL)
1320 unsigned int new_to_type = to_type;
1322 if (info->executable
1325 && (tls_type & GOT_TLS_IE))
1326 new_to_type = R_386_TLS_LE_32;
1328 if (to_type == R_386_TLS_GD
1329 || to_type == R_386_TLS_GOTDESC
1330 || to_type == R_386_TLS_DESC_CALL)
1332 if (tls_type == GOT_TLS_IE_POS)
1333 new_to_type = R_386_TLS_GOTIE;
1334 else if (tls_type & GOT_TLS_IE)
1335 new_to_type = R_386_TLS_IE_32;
1338 /* We checked the transition before when we were called from
1339 elf_i386_check_relocs. We only want to check the new
1340 transition which hasn't been checked before. */
1341 check = new_to_type != to_type && from_type == to_type;
1342 to_type = new_to_type;
1348 if (info->executable)
1349 to_type = R_386_TLS_LE_32;
1356 /* Return TRUE if there is no transition. */
1357 if (from_type == to_type)
1360 /* Check if the transition can be performed. */
1362 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1363 symtab_hdr, sym_hashes,
1364 from_type, rel, relend))
1366 reloc_howto_type *from, *to;
1369 from = elf_i386_rtype_to_howto (abfd, from_type);
1370 to = elf_i386_rtype_to_howto (abfd, to_type);
1373 name = h->root.root.string;
1376 struct elf_i386_link_hash_table *htab;
1378 htab = elf_i386_hash_table (info);
1383 Elf_Internal_Sym *isym;
1385 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1387 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1391 (*_bfd_error_handler)
1392 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1393 "in section `%A' failed"),
1394 abfd, sec, from->name, to->name, name,
1395 (unsigned long) rel->r_offset);
1396 bfd_set_error (bfd_error_bad_value);
1404 /* Look through the relocs for a section during the first phase, and
1405 calculate needed space in the global offset table, procedure linkage
1406 table, and dynamic reloc sections. */
1409 elf_i386_check_relocs (bfd *abfd,
1410 struct bfd_link_info *info,
1412 const Elf_Internal_Rela *relocs)
1414 struct elf_i386_link_hash_table *htab;
1415 Elf_Internal_Shdr *symtab_hdr;
1416 struct elf_link_hash_entry **sym_hashes;
1417 const Elf_Internal_Rela *rel;
1418 const Elf_Internal_Rela *rel_end;
1421 if (info->relocatable)
1424 BFD_ASSERT (is_i386_elf (abfd));
1426 htab = elf_i386_hash_table (info);
1430 symtab_hdr = &elf_symtab_hdr (abfd);
1431 sym_hashes = elf_sym_hashes (abfd);
1435 rel_end = relocs + sec->reloc_count;
1436 for (rel = relocs; rel < rel_end; rel++)
1438 unsigned int r_type;
1439 unsigned long r_symndx;
1440 struct elf_link_hash_entry *h;
1441 Elf_Internal_Sym *isym;
1443 bfd_boolean size_reloc;
1445 r_symndx = ELF32_R_SYM (rel->r_info);
1446 r_type = ELF32_R_TYPE (rel->r_info);
1448 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1450 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1456 if (r_symndx < symtab_hdr->sh_info)
1458 /* A local symbol. */
1459 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1464 /* Check relocation against local STT_GNU_IFUNC symbol. */
1465 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1467 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1471 /* Fake a STT_GNU_IFUNC symbol. */
1472 h->type = STT_GNU_IFUNC;
1475 h->forced_local = 1;
1476 h->root.type = bfd_link_hash_defined;
1484 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1485 while (h->root.type == bfd_link_hash_indirect
1486 || h->root.type == bfd_link_hash_warning)
1487 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1492 /* Create the ifunc sections for static executables. If we
1493 never see an indirect function symbol nor we are building
1494 a static executable, those sections will be empty and
1495 won't appear in output. */
1506 if (htab->elf.dynobj == NULL)
1507 htab->elf.dynobj = abfd;
1508 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1513 /* It is referenced by a non-shared object. */
1515 h->root.non_ir_ref = 1;
1518 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1519 symtab_hdr, sym_hashes,
1520 &r_type, GOT_UNKNOWN,
1521 rel, rel_end, h, r_symndx))
1527 htab->tls_ldm_got.refcount += 1;
1531 /* This symbol requires a procedure linkage table entry. We
1532 actually build the entry in adjust_dynamic_symbol,
1533 because this might be a case of linking PIC code which is
1534 never referenced by a dynamic object, in which case we
1535 don't need to generate a procedure linkage table entry
1538 /* If this is a local symbol, we resolve it directly without
1539 creating a procedure linkage table entry. */
1544 h->plt.refcount += 1;
1551 case R_386_TLS_IE_32:
1553 case R_386_TLS_GOTIE:
1554 if (!info->executable)
1555 info->flags |= DF_STATIC_TLS;
1560 case R_386_TLS_GOTDESC:
1561 case R_386_TLS_DESC_CALL:
1562 /* This symbol requires a global offset table entry. */
1564 int tls_type, old_tls_type;
1569 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1570 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1571 case R_386_TLS_GOTDESC:
1572 case R_386_TLS_DESC_CALL:
1573 tls_type = GOT_TLS_GDESC; break;
1574 case R_386_TLS_IE_32:
1575 if (ELF32_R_TYPE (rel->r_info) == r_type)
1576 tls_type = GOT_TLS_IE_NEG;
1578 /* If this is a GD->IE transition, we may use either of
1579 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1580 tls_type = GOT_TLS_IE;
1583 case R_386_TLS_GOTIE:
1584 tls_type = GOT_TLS_IE_POS; break;
1589 h->got.refcount += 1;
1590 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1594 bfd_signed_vma *local_got_refcounts;
1596 /* This is a global offset table entry for a local symbol. */
1597 local_got_refcounts = elf_local_got_refcounts (abfd);
1598 if (local_got_refcounts == NULL)
1602 size = symtab_hdr->sh_info;
1603 size *= (sizeof (bfd_signed_vma)
1604 + sizeof (bfd_vma) + sizeof(char));
1605 local_got_refcounts = (bfd_signed_vma *)
1606 bfd_zalloc (abfd, size);
1607 if (local_got_refcounts == NULL)
1609 elf_local_got_refcounts (abfd) = local_got_refcounts;
1610 elf_i386_local_tlsdesc_gotent (abfd)
1611 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1612 elf_i386_local_got_tls_type (abfd)
1613 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1615 local_got_refcounts[r_symndx] += 1;
1616 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1619 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1620 tls_type |= old_tls_type;
1621 /* If a TLS symbol is accessed using IE at least once,
1622 there is no point to use dynamic model for it. */
1623 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1624 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1625 || (tls_type & GOT_TLS_IE) == 0))
1627 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1628 tls_type = old_tls_type;
1629 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1630 && GOT_TLS_GD_ANY_P (tls_type))
1631 tls_type |= old_tls_type;
1635 name = h->root.root.string;
1637 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1639 (*_bfd_error_handler)
1640 (_("%B: `%s' accessed both as normal and "
1641 "thread local symbol"),
1643 bfd_set_error (bfd_error_bad_value);
1648 if (old_tls_type != tls_type)
1651 elf_i386_hash_entry (h)->tls_type = tls_type;
1653 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1661 if (htab->elf.sgot == NULL)
1663 if (htab->elf.dynobj == NULL)
1664 htab->elf.dynobj = abfd;
1665 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1668 if (r_type != R_386_TLS_IE)
1672 case R_386_TLS_LE_32:
1674 if (info->executable)
1676 info->flags |= DF_STATIC_TLS;
1681 if (h != NULL && info->executable)
1683 /* If this reloc is in a read-only section, we might
1684 need a copy reloc. We can't check reliably at this
1685 stage whether the section is read-only, as input
1686 sections have not yet been mapped to output sections.
1687 Tentatively set the flag for now, and correct in
1688 adjust_dynamic_symbol. */
1691 /* We may need a .plt entry if the function this reloc
1692 refers to is in a shared lib. */
1693 h->plt.refcount += 1;
1694 if (r_type != R_386_PC32)
1695 h->pointer_equality_needed = 1;
1700 /* If we are creating a shared library, and this is a reloc
1701 against a global symbol, or a non PC relative reloc
1702 against a local symbol, then we need to copy the reloc
1703 into the shared library. However, if we are linking with
1704 -Bsymbolic, we do not need to copy a reloc against a
1705 global symbol which is defined in an object we are
1706 including in the link (i.e., DEF_REGULAR is set). At
1707 this point we have not seen all the input files, so it is
1708 possible that DEF_REGULAR is not set now but will be set
1709 later (it is never cleared). In case of a weak definition,
1710 DEF_REGULAR may be cleared later by a strong definition in
1711 a shared library. We account for that possibility below by
1712 storing information in the relocs_copied field of the hash
1713 table entry. A similar situation occurs when creating
1714 shared libraries and symbol visibility changes render the
1717 If on the other hand, we are creating an executable, we
1718 may need to keep relocations for symbols satisfied by a
1719 dynamic library if we manage to avoid copy relocs for the
1722 && (sec->flags & SEC_ALLOC) != 0
1723 && (r_type != R_386_PC32
1725 && (! SYMBOLIC_BIND (info, h)
1726 || h->root.type == bfd_link_hash_defweak
1727 || !h->def_regular))))
1728 || (ELIMINATE_COPY_RELOCS
1730 && (sec->flags & SEC_ALLOC) != 0
1732 && (h->root.type == bfd_link_hash_defweak
1733 || !h->def_regular)))
1735 struct elf_dyn_relocs *p;
1736 struct elf_dyn_relocs **head;
1738 /* We must copy these reloc types into the output file.
1739 Create a reloc section in dynobj and make room for
1743 if (htab->elf.dynobj == NULL)
1744 htab->elf.dynobj = abfd;
1746 sreloc = _bfd_elf_make_dynamic_reloc_section
1747 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1753 /* If this is a global symbol, we count the number of
1754 relocations we need for this symbol. */
1757 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1761 /* Track dynamic relocs needed for local syms too.
1762 We really need local syms available to do this
1767 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1772 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1776 vpp = &elf_section_data (s)->local_dynrel;
1777 head = (struct elf_dyn_relocs **)vpp;
1781 if (p == NULL || p->sec != sec)
1783 bfd_size_type amt = sizeof *p;
1784 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1796 /* Count size relocation as PC-relative relocation. */
1797 if (r_type == R_386_PC32 || size_reloc)
1802 /* This relocation describes the C++ object vtable hierarchy.
1803 Reconstruct it for later use during GC. */
1804 case R_386_GNU_VTINHERIT:
1805 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1809 /* This relocation describes which C++ vtable entries are actually
1810 used. Record for later use during GC. */
1811 case R_386_GNU_VTENTRY:
1812 BFD_ASSERT (h != NULL);
1814 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1826 /* Return the section that should be marked against GC for a given
1830 elf_i386_gc_mark_hook (asection *sec,
1831 struct bfd_link_info *info,
1832 Elf_Internal_Rela *rel,
1833 struct elf_link_hash_entry *h,
1834 Elf_Internal_Sym *sym)
1837 switch (ELF32_R_TYPE (rel->r_info))
1839 case R_386_GNU_VTINHERIT:
1840 case R_386_GNU_VTENTRY:
1844 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1847 /* Update the got entry reference counts for the section being removed. */
1850 elf_i386_gc_sweep_hook (bfd *abfd,
1851 struct bfd_link_info *info,
1853 const Elf_Internal_Rela *relocs)
1855 struct elf_i386_link_hash_table *htab;
1856 Elf_Internal_Shdr *symtab_hdr;
1857 struct elf_link_hash_entry **sym_hashes;
1858 bfd_signed_vma *local_got_refcounts;
1859 const Elf_Internal_Rela *rel, *relend;
1861 if (info->relocatable)
1864 htab = elf_i386_hash_table (info);
1868 elf_section_data (sec)->local_dynrel = NULL;
1870 symtab_hdr = &elf_symtab_hdr (abfd);
1871 sym_hashes = elf_sym_hashes (abfd);
1872 local_got_refcounts = elf_local_got_refcounts (abfd);
1874 relend = relocs + sec->reloc_count;
1875 for (rel = relocs; rel < relend; rel++)
1877 unsigned long r_symndx;
1878 unsigned int r_type;
1879 struct elf_link_hash_entry *h = NULL;
1881 r_symndx = ELF32_R_SYM (rel->r_info);
1882 if (r_symndx >= symtab_hdr->sh_info)
1884 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1885 while (h->root.type == bfd_link_hash_indirect
1886 || h->root.type == bfd_link_hash_warning)
1887 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1891 /* A local symbol. */
1892 Elf_Internal_Sym *isym;
1894 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1897 /* Check relocation against local STT_GNU_IFUNC symbol. */
1899 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1901 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
1909 struct elf_i386_link_hash_entry *eh;
1910 struct elf_dyn_relocs **pp;
1911 struct elf_dyn_relocs *p;
1913 eh = (struct elf_i386_link_hash_entry *) h;
1914 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1917 /* Everything must go for SEC. */
1923 r_type = ELF32_R_TYPE (rel->r_info);
1924 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1925 symtab_hdr, sym_hashes,
1926 &r_type, GOT_UNKNOWN,
1927 rel, relend, h, r_symndx))
1933 if (htab->tls_ldm_got.refcount > 0)
1934 htab->tls_ldm_got.refcount -= 1;
1938 case R_386_TLS_GOTDESC:
1939 case R_386_TLS_DESC_CALL:
1940 case R_386_TLS_IE_32:
1942 case R_386_TLS_GOTIE:
1946 if (h->got.refcount > 0)
1947 h->got.refcount -= 1;
1948 if (h->type == STT_GNU_IFUNC)
1950 if (h->plt.refcount > 0)
1951 h->plt.refcount -= 1;
1954 else if (local_got_refcounts != NULL)
1956 if (local_got_refcounts[r_symndx] > 0)
1957 local_got_refcounts[r_symndx] -= 1;
1965 && (h == NULL || h->type != STT_GNU_IFUNC))
1972 if (h->plt.refcount > 0)
1973 h->plt.refcount -= 1;
1978 if (h != NULL && h->type == STT_GNU_IFUNC)
1980 if (h->got.refcount > 0)
1981 h->got.refcount -= 1;
1982 if (h->plt.refcount > 0)
1983 h->plt.refcount -= 1;
1995 /* Adjust a symbol defined by a dynamic object and referenced by a
1996 regular object. The current definition is in some section of the
1997 dynamic object, but we're not including those sections. We have to
1998 change the definition to something the rest of the link can
2002 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2003 struct elf_link_hash_entry *h)
2005 struct elf_i386_link_hash_table *htab;
2007 struct elf_i386_link_hash_entry *eh;
2008 struct elf_dyn_relocs *p;
2010 /* STT_GNU_IFUNC symbol must go through PLT. */
2011 if (h->type == STT_GNU_IFUNC)
2013 /* All local STT_GNU_IFUNC references must be treate as local
2014 calls via local PLT. */
2016 && SYMBOL_CALLS_LOCAL (info, h))
2018 bfd_size_type pc_count = 0, count = 0;
2019 struct elf_dyn_relocs **pp;
2021 eh = (struct elf_i386_link_hash_entry *) h;
2022 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2024 pc_count += p->pc_count;
2025 p->count -= p->pc_count;
2034 if (pc_count || count)
2038 if (h->plt.refcount <= 0)
2039 h->plt.refcount = 1;
2041 h->plt.refcount += 1;
2045 if (h->plt.refcount <= 0)
2047 h->plt.offset = (bfd_vma) -1;
2053 /* If this is a function, put it in the procedure linkage table. We
2054 will fill in the contents of the procedure linkage table later,
2055 when we know the address of the .got section. */
2056 if (h->type == STT_FUNC
2059 if (h->plt.refcount <= 0
2060 || SYMBOL_CALLS_LOCAL (info, h)
2061 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2062 && h->root.type == bfd_link_hash_undefweak))
2064 /* This case can occur if we saw a PLT32 reloc in an input
2065 file, but the symbol was never referred to by a dynamic
2066 object, or if all references were garbage collected. In
2067 such a case, we don't actually need to build a procedure
2068 linkage table, and we can just do a PC32 reloc instead. */
2069 h->plt.offset = (bfd_vma) -1;
2076 /* It's possible that we incorrectly decided a .plt reloc was
2077 needed for an R_386_PC32 reloc to a non-function sym in
2078 check_relocs. We can't decide accurately between function and
2079 non-function syms in check-relocs; Objects loaded later in
2080 the link may change h->type. So fix it now. */
2081 h->plt.offset = (bfd_vma) -1;
2083 /* If this is a weak symbol, and there is a real definition, the
2084 processor independent code will have arranged for us to see the
2085 real definition first, and we can just use the same value. */
2086 if (h->u.weakdef != NULL)
2088 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2089 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2090 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2091 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2092 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2093 h->non_got_ref = h->u.weakdef->non_got_ref;
2097 /* This is a reference to a symbol defined by a dynamic object which
2098 is not a function. */
2100 /* If we are creating a shared library, we must presume that the
2101 only references to the symbol are via the global offset table.
2102 For such cases we need not do anything here; the relocations will
2103 be handled correctly by relocate_section. */
2107 /* If there are no references to this symbol that do not use the
2108 GOT, we don't need to generate a copy reloc. */
2109 if (!h->non_got_ref)
2112 /* If -z nocopyreloc was given, we won't generate them either. */
2113 if (info->nocopyreloc)
2119 htab = elf_i386_hash_table (info);
2123 /* If there aren't any dynamic relocs in read-only sections, then
2124 we can keep the dynamic relocs and avoid the copy reloc. This
2125 doesn't work on VxWorks, where we can not have dynamic relocations
2126 (other than copy and jump slot relocations) in an executable. */
2127 if (ELIMINATE_COPY_RELOCS
2128 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2130 eh = (struct elf_i386_link_hash_entry *) h;
2131 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2133 s = p->sec->output_section;
2134 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2145 /* We must allocate the symbol in our .dynbss section, which will
2146 become part of the .bss section of the executable. There will be
2147 an entry for this symbol in the .dynsym section. The dynamic
2148 object will contain position independent code, so all references
2149 from the dynamic object to this symbol will go through the global
2150 offset table. The dynamic linker will use the .dynsym entry to
2151 determine the address it must put in the global offset table, so
2152 both the dynamic object and the regular object will refer to the
2153 same memory location for the variable. */
2155 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2156 copy the initial value out of the dynamic object and into the
2157 runtime process image. */
2158 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2160 htab->srelbss->size += sizeof (Elf32_External_Rel);
2166 return _bfd_elf_adjust_dynamic_copy (h, s);
2169 /* Allocate space in .plt, .got and associated reloc sections for
2173 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2175 struct bfd_link_info *info;
2176 struct elf_i386_link_hash_table *htab;
2177 struct elf_i386_link_hash_entry *eh;
2178 struct elf_dyn_relocs *p;
2179 unsigned plt_entry_size;
2181 if (h->root.type == bfd_link_hash_indirect)
2184 eh = (struct elf_i386_link_hash_entry *) h;
2186 info = (struct bfd_link_info *) inf;
2187 htab = elf_i386_hash_table (info);
2191 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2193 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2194 here if it is defined and referenced in a non-shared object. */
2195 if (h->type == STT_GNU_IFUNC
2197 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2200 else if (htab->elf.dynamic_sections_created
2201 && h->plt.refcount > 0)
2203 /* Make sure this symbol is output as a dynamic symbol.
2204 Undefined weak syms won't yet be marked as dynamic. */
2205 if (h->dynindx == -1
2206 && !h->forced_local)
2208 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2213 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2215 asection *s = htab->elf.splt;
2217 /* If this is the first .plt entry, make room for the special
2220 s->size = plt_entry_size;
2222 h->plt.offset = s->size;
2224 /* If this symbol is not defined in a regular file, and we are
2225 not generating a shared library, then set the symbol to this
2226 location in the .plt. This is required to make function
2227 pointers compare as equal between the normal executable and
2228 the shared library. */
2232 h->root.u.def.section = s;
2233 h->root.u.def.value = h->plt.offset;
2236 /* Make room for this entry. */
2237 s->size += plt_entry_size;
2239 /* We also need to make an entry in the .got.plt section, which
2240 will be placed in the .got section by the linker script. */
2241 htab->elf.sgotplt->size += 4;
2243 /* We also need to make an entry in the .rel.plt section. */
2244 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2245 htab->elf.srelplt->reloc_count++;
2247 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2250 /* VxWorks has a second set of relocations for each PLT entry
2251 in executables. They go in a separate relocation section,
2252 which is processed by the kernel loader. */
2254 /* There are two relocations for the initial PLT entry: an
2255 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2256 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2258 if (h->plt.offset == plt_entry_size)
2259 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2261 /* There are two extra relocations for each subsequent PLT entry:
2262 an R_386_32 relocation for the GOT entry, and an R_386_32
2263 relocation for the PLT entry. */
2265 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2270 h->plt.offset = (bfd_vma) -1;
2276 h->plt.offset = (bfd_vma) -1;
2280 eh->tlsdesc_got = (bfd_vma) -1;
2282 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2283 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2284 if (h->got.refcount > 0
2287 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2288 h->got.offset = (bfd_vma) -1;
2289 else if (h->got.refcount > 0)
2293 int tls_type = elf_i386_hash_entry(h)->tls_type;
2295 /* Make sure this symbol is output as a dynamic symbol.
2296 Undefined weak syms won't yet be marked as dynamic. */
2297 if (h->dynindx == -1
2298 && !h->forced_local)
2300 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2305 if (GOT_TLS_GDESC_P (tls_type))
2307 eh->tlsdesc_got = htab->elf.sgotplt->size
2308 - elf_i386_compute_jump_table_size (htab);
2309 htab->elf.sgotplt->size += 8;
2310 h->got.offset = (bfd_vma) -2;
2312 if (! GOT_TLS_GDESC_P (tls_type)
2313 || GOT_TLS_GD_P (tls_type))
2315 h->got.offset = s->size;
2317 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2318 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2321 dyn = htab->elf.dynamic_sections_created;
2322 /* R_386_TLS_IE_32 needs one dynamic relocation,
2323 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2324 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2325 need two), R_386_TLS_GD needs one if local symbol and two if
2327 if (tls_type == GOT_TLS_IE_BOTH)
2328 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2329 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2330 || (tls_type & GOT_TLS_IE))
2331 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2332 else if (GOT_TLS_GD_P (tls_type))
2333 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2334 else if (! GOT_TLS_GDESC_P (tls_type)
2335 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2336 || h->root.type != bfd_link_hash_undefweak)
2338 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2339 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2340 if (GOT_TLS_GDESC_P (tls_type))
2341 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2344 h->got.offset = (bfd_vma) -1;
2346 if (eh->dyn_relocs == NULL)
2349 /* In the shared -Bsymbolic case, discard space allocated for
2350 dynamic pc-relative relocs against symbols which turn out to be
2351 defined in regular objects. For the normal shared case, discard
2352 space for pc-relative relocs that have become local due to symbol
2353 visibility changes. */
2357 /* The only reloc that uses pc_count is R_386_PC32, which will
2358 appear on a call or on something like ".long foo - .". We
2359 want calls to protected symbols to resolve directly to the
2360 function rather than going via the plt. If people want
2361 function pointer comparisons to work as expected then they
2362 should avoid writing assembly like ".long foo - .". */
2363 if (SYMBOL_CALLS_LOCAL (info, h))
2365 struct elf_dyn_relocs **pp;
2367 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2369 p->count -= p->pc_count;
2378 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2380 struct elf_dyn_relocs **pp;
2381 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2383 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2390 /* Also discard relocs on undefined weak syms with non-default
2392 if (eh->dyn_relocs != NULL
2393 && h->root.type == bfd_link_hash_undefweak)
2395 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2396 eh->dyn_relocs = NULL;
2398 /* Make sure undefined weak symbols are output as a dynamic
2400 else if (h->dynindx == -1
2401 && !h->forced_local)
2403 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2408 else if (ELIMINATE_COPY_RELOCS)
2410 /* For the non-shared case, discard space for relocs against
2411 symbols which turn out to need copy relocs or are not
2417 || (htab->elf.dynamic_sections_created
2418 && (h->root.type == bfd_link_hash_undefweak
2419 || h->root.type == bfd_link_hash_undefined))))
2421 /* Make sure this symbol is output as a dynamic symbol.
2422 Undefined weak syms won't yet be marked as dynamic. */
2423 if (h->dynindx == -1
2424 && !h->forced_local)
2426 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2430 /* If that succeeded, we know we'll be keeping all the
2432 if (h->dynindx != -1)
2436 eh->dyn_relocs = NULL;
2441 /* Finally, allocate space. */
2442 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2446 sreloc = elf_section_data (p->sec)->sreloc;
2448 BFD_ASSERT (sreloc != NULL);
2449 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2455 /* Allocate space in .plt, .got and associated reloc sections for
2456 local dynamic relocs. */
2459 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2461 struct elf_link_hash_entry *h
2462 = (struct elf_link_hash_entry *) *slot;
2464 if (h->type != STT_GNU_IFUNC
2468 || h->root.type != bfd_link_hash_defined)
2471 return elf_i386_allocate_dynrelocs (h, inf);
2474 /* Find any dynamic relocs that apply to read-only sections. */
2477 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2479 struct elf_i386_link_hash_entry *eh;
2480 struct elf_dyn_relocs *p;
2482 /* Skip local IFUNC symbols. */
2483 if (h->forced_local && h->type == STT_GNU_IFUNC)
2486 eh = (struct elf_i386_link_hash_entry *) h;
2487 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2489 asection *s = p->sec->output_section;
2491 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2493 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2495 info->flags |= DF_TEXTREL;
2497 if (info->warn_shared_textrel && info->shared)
2498 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2499 p->sec->owner, h->root.root.string,
2502 /* Not an error, just cut short the traversal. */
2510 mov foo@GOT(%reg), %reg
2512 lea foo@GOTOFF(%reg), %reg
2513 with the local symbol, foo. */
2516 elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2517 struct bfd_link_info *link_info)
2519 Elf_Internal_Shdr *symtab_hdr;
2520 Elf_Internal_Rela *internal_relocs;
2521 Elf_Internal_Rela *irel, *irelend;
2523 struct elf_i386_link_hash_table *htab;
2524 bfd_boolean changed_contents;
2525 bfd_boolean changed_relocs;
2526 bfd_signed_vma *local_got_refcounts;
2528 /* Don't even try to convert non-ELF outputs. */
2529 if (!is_elf_hash_table (link_info->hash))
2532 /* Nothing to do if there are no codes, no relocations or no output. */
2533 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2534 || sec->reloc_count == 0
2535 || discarded_section (sec))
2538 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2540 /* Load the relocations for this section. */
2541 internal_relocs = (_bfd_elf_link_read_relocs
2542 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2543 link_info->keep_memory));
2544 if (internal_relocs == NULL)
2547 htab = elf_i386_hash_table (link_info);
2548 changed_contents = FALSE;
2549 changed_relocs = FALSE;
2550 local_got_refcounts = elf_local_got_refcounts (abfd);
2552 /* Get the section contents. */
2553 if (elf_section_data (sec)->this_hdr.contents != NULL)
2554 contents = elf_section_data (sec)->this_hdr.contents;
2557 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2561 irelend = internal_relocs + sec->reloc_count;
2562 for (irel = internal_relocs; irel < irelend; irel++)
2564 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2565 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2567 struct elf_link_hash_entry *h;
2569 if (r_type != R_386_GOT32)
2572 /* Get the symbol referred to by the reloc. */
2573 if (r_symndx < symtab_hdr->sh_info)
2575 Elf_Internal_Sym *isym;
2577 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2580 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2581 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2582 && bfd_get_8 (input_bfd,
2583 contents + irel->r_offset - 2) == 0x8b)
2585 bfd_put_8 (output_bfd, 0x8d,
2586 contents + irel->r_offset - 2);
2587 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2588 if (local_got_refcounts != NULL
2589 && local_got_refcounts[r_symndx] > 0)
2590 local_got_refcounts[r_symndx] -= 1;
2591 changed_contents = TRUE;
2592 changed_relocs = TRUE;
2597 indx = r_symndx - symtab_hdr->sh_info;
2598 h = elf_sym_hashes (abfd)[indx];
2599 BFD_ASSERT (h != NULL);
2601 while (h->root.type == bfd_link_hash_indirect
2602 || h->root.type == bfd_link_hash_warning)
2603 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2605 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2606 optimizing _DYNAMIC since ld.so may use its link-time address. */
2608 && h->type != STT_GNU_IFUNC
2609 && h != htab->elf.hdynamic
2610 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2611 && bfd_get_8 (input_bfd,
2612 contents + irel->r_offset - 2) == 0x8b)
2614 bfd_put_8 (output_bfd, 0x8d,
2615 contents + irel->r_offset - 2);
2616 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2617 if (h->got.refcount > 0)
2618 h->got.refcount -= 1;
2619 changed_contents = TRUE;
2620 changed_relocs = TRUE;
2624 if (contents != NULL
2625 && elf_section_data (sec)->this_hdr.contents != contents)
2627 if (!changed_contents && !link_info->keep_memory)
2631 /* Cache the section contents for elf_link_input_bfd. */
2632 elf_section_data (sec)->this_hdr.contents = contents;
2636 if (elf_section_data (sec)->relocs != internal_relocs)
2638 if (!changed_relocs)
2639 free (internal_relocs);
2641 elf_section_data (sec)->relocs = internal_relocs;
2647 if (contents != NULL
2648 && elf_section_data (sec)->this_hdr.contents != contents)
2650 if (internal_relocs != NULL
2651 && elf_section_data (sec)->relocs != internal_relocs)
2652 free (internal_relocs);
2656 /* Set the sizes of the dynamic sections. */
2659 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2661 struct elf_i386_link_hash_table *htab;
2667 htab = elf_i386_hash_table (info);
2670 dynobj = htab->elf.dynobj;
2674 if (htab->elf.dynamic_sections_created)
2676 /* Set the contents of the .interp section to the interpreter. */
2677 if (info->executable)
2679 s = bfd_get_linker_section (dynobj, ".interp");
2682 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2683 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2687 /* Set up .got offsets for local syms, and space for local dynamic
2689 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2691 bfd_signed_vma *local_got;
2692 bfd_signed_vma *end_local_got;
2693 char *local_tls_type;
2694 bfd_vma *local_tlsdesc_gotent;
2695 bfd_size_type locsymcount;
2696 Elf_Internal_Shdr *symtab_hdr;
2699 if (! is_i386_elf (ibfd))
2702 for (s = ibfd->sections; s != NULL; s = s->next)
2704 struct elf_dyn_relocs *p;
2706 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2709 for (p = ((struct elf_dyn_relocs *)
2710 elf_section_data (s)->local_dynrel);
2714 if (!bfd_is_abs_section (p->sec)
2715 && bfd_is_abs_section (p->sec->output_section))
2717 /* Input section has been discarded, either because
2718 it is a copy of a linkonce section or due to
2719 linker script /DISCARD/, so we'll be discarding
2722 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
2723 && strcmp (p->sec->output_section->name,
2726 /* Relocations in vxworks .tls_vars sections are
2727 handled specially by the loader. */
2729 else if (p->count != 0)
2731 srel = elf_section_data (p->sec)->sreloc;
2732 srel->size += p->count * sizeof (Elf32_External_Rel);
2733 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2734 && (info->flags & DF_TEXTREL) == 0)
2736 info->flags |= DF_TEXTREL;
2737 if (info->warn_shared_textrel && info->shared)
2738 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2739 p->sec->owner, p->sec);
2745 local_got = elf_local_got_refcounts (ibfd);
2749 symtab_hdr = &elf_symtab_hdr (ibfd);
2750 locsymcount = symtab_hdr->sh_info;
2751 end_local_got = local_got + locsymcount;
2752 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2753 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2755 srel = htab->elf.srelgot;
2756 for (; local_got < end_local_got;
2757 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2759 *local_tlsdesc_gotent = (bfd_vma) -1;
2762 if (GOT_TLS_GDESC_P (*local_tls_type))
2764 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2765 - elf_i386_compute_jump_table_size (htab);
2766 htab->elf.sgotplt->size += 8;
2767 *local_got = (bfd_vma) -2;
2769 if (! GOT_TLS_GDESC_P (*local_tls_type)
2770 || GOT_TLS_GD_P (*local_tls_type))
2772 *local_got = s->size;
2774 if (GOT_TLS_GD_P (*local_tls_type)
2775 || *local_tls_type == GOT_TLS_IE_BOTH)
2779 || GOT_TLS_GD_ANY_P (*local_tls_type)
2780 || (*local_tls_type & GOT_TLS_IE))
2782 if (*local_tls_type == GOT_TLS_IE_BOTH)
2783 srel->size += 2 * sizeof (Elf32_External_Rel);
2784 else if (GOT_TLS_GD_P (*local_tls_type)
2785 || ! GOT_TLS_GDESC_P (*local_tls_type))
2786 srel->size += sizeof (Elf32_External_Rel);
2787 if (GOT_TLS_GDESC_P (*local_tls_type))
2788 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2792 *local_got = (bfd_vma) -1;
2796 if (htab->tls_ldm_got.refcount > 0)
2798 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2800 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2801 htab->elf.sgot->size += 8;
2802 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2805 htab->tls_ldm_got.offset = -1;
2807 /* Allocate global sym .plt and .got entries, and space for global
2808 sym dynamic relocs. */
2809 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2811 /* Allocate .plt and .got entries, and space for local symbols. */
2812 htab_traverse (htab->loc_hash_table,
2813 elf_i386_allocate_local_dynrelocs,
2816 /* For every jump slot reserved in the sgotplt, reloc_count is
2817 incremented. However, when we reserve space for TLS descriptors,
2818 it's not incremented, so in order to compute the space reserved
2819 for them, it suffices to multiply the reloc count by the jump
2822 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2823 so that R_386_IRELATIVE entries come last. */
2824 if (htab->elf.srelplt)
2826 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2827 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2828 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2830 else if (htab->elf.irelplt)
2831 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2834 if (htab->elf.sgotplt)
2836 /* Don't allocate .got.plt section if there are no GOT nor PLT
2837 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2838 if ((htab->elf.hgot == NULL
2839 || !htab->elf.hgot->ref_regular_nonweak)
2840 && (htab->elf.sgotplt->size
2841 == get_elf_backend_data (output_bfd)->got_header_size)
2842 && (htab->elf.splt == NULL
2843 || htab->elf.splt->size == 0)
2844 && (htab->elf.sgot == NULL
2845 || htab->elf.sgot->size == 0)
2846 && (htab->elf.iplt == NULL
2847 || htab->elf.iplt->size == 0)
2848 && (htab->elf.igotplt == NULL
2849 || htab->elf.igotplt->size == 0))
2850 htab->elf.sgotplt->size = 0;
2854 if (htab->plt_eh_frame != NULL
2855 && htab->elf.splt != NULL
2856 && htab->elf.splt->size != 0
2857 && !bfd_is_abs_section (htab->elf.splt->output_section)
2858 && _bfd_elf_eh_frame_present (info))
2859 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
2861 /* We now have determined the sizes of the various dynamic sections.
2862 Allocate memory for them. */
2864 for (s = dynobj->sections; s != NULL; s = s->next)
2866 bfd_boolean strip_section = TRUE;
2868 if ((s->flags & SEC_LINKER_CREATED) == 0)
2871 if (s == htab->elf.splt
2872 || s == htab->elf.sgot)
2874 /* Strip this section if we don't need it; see the
2876 /* We'd like to strip these sections if they aren't needed, but if
2877 we've exported dynamic symbols from them we must leave them.
2878 It's too late to tell BFD to get rid of the symbols. */
2880 if (htab->elf.hplt != NULL)
2881 strip_section = FALSE;
2883 else if (s == htab->elf.sgotplt
2884 || s == htab->elf.iplt
2885 || s == htab->elf.igotplt
2886 || s == htab->plt_eh_frame
2887 || s == htab->sdynbss)
2889 /* Strip these too. */
2891 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2894 && s != htab->elf.srelplt
2895 && s != htab->srelplt2)
2898 /* We use the reloc_count field as a counter if we need
2899 to copy relocs into the output file. */
2904 /* It's not one of our sections, so don't allocate space. */
2910 /* If we don't need this section, strip it from the
2911 output file. This is mostly to handle .rel.bss and
2912 .rel.plt. We must create both sections in
2913 create_dynamic_sections, because they must be created
2914 before the linker maps input sections to output
2915 sections. The linker does that before
2916 adjust_dynamic_symbol is called, and it is that
2917 function which decides whether anything needs to go
2918 into these sections. */
2920 s->flags |= SEC_EXCLUDE;
2924 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2927 /* Allocate memory for the section contents. We use bfd_zalloc
2928 here in case unused entries are not reclaimed before the
2929 section's contents are written out. This should not happen,
2930 but this way if it does, we get a R_386_NONE reloc instead
2932 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2933 if (s->contents == NULL)
2937 if (htab->plt_eh_frame != NULL
2938 && htab->plt_eh_frame->contents != NULL)
2940 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
2941 sizeof (elf_i386_eh_frame_plt));
2942 bfd_put_32 (dynobj, htab->elf.splt->size,
2943 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2946 if (htab->elf.dynamic_sections_created)
2948 /* Add some entries to the .dynamic section. We fill in the
2949 values later, in elf_i386_finish_dynamic_sections, but we
2950 must add the entries now so that we get the correct size for
2951 the .dynamic section. The DT_DEBUG entry is filled in by the
2952 dynamic linker and used by the debugger. */
2953 #define add_dynamic_entry(TAG, VAL) \
2954 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2956 if (info->executable)
2958 if (!add_dynamic_entry (DT_DEBUG, 0))
2962 if (htab->elf.splt->size != 0)
2964 if (!add_dynamic_entry (DT_PLTGOT, 0)
2965 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2966 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2967 || !add_dynamic_entry (DT_JMPREL, 0))
2973 if (!add_dynamic_entry (DT_REL, 0)
2974 || !add_dynamic_entry (DT_RELSZ, 0)
2975 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2978 /* If any dynamic relocs apply to a read-only section,
2979 then we need a DT_TEXTREL entry. */
2980 if ((info->flags & DF_TEXTREL) == 0)
2981 elf_link_hash_traverse (&htab->elf,
2982 elf_i386_readonly_dynrelocs, info);
2984 if ((info->flags & DF_TEXTREL) != 0)
2986 if (!add_dynamic_entry (DT_TEXTREL, 0))
2990 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
2991 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2994 #undef add_dynamic_entry
3000 elf_i386_always_size_sections (bfd *output_bfd,
3001 struct bfd_link_info *info)
3003 asection *tls_sec = elf_hash_table (info)->tls_sec;
3007 struct elf_link_hash_entry *tlsbase;
3009 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3010 "_TLS_MODULE_BASE_",
3011 FALSE, FALSE, FALSE);
3013 if (tlsbase && tlsbase->type == STT_TLS)
3015 struct elf_i386_link_hash_table *htab;
3016 struct bfd_link_hash_entry *bh = NULL;
3017 const struct elf_backend_data *bed
3018 = get_elf_backend_data (output_bfd);
3020 htab = elf_i386_hash_table (info);
3024 if (!(_bfd_generic_link_add_one_symbol
3025 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3026 tls_sec, 0, NULL, FALSE,
3027 bed->collect, &bh)))
3030 htab->tls_module_base = bh;
3032 tlsbase = (struct elf_link_hash_entry *)bh;
3033 tlsbase->def_regular = 1;
3034 tlsbase->other = STV_HIDDEN;
3035 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3042 /* Set the correct type for an x86 ELF section. We do this by the
3043 section name, which is a hack, but ought to work. */
3046 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3047 Elf_Internal_Shdr *hdr,
3052 name = bfd_get_section_name (abfd, sec);
3054 /* This is an ugly, but unfortunately necessary hack that is
3055 needed when producing EFI binaries on x86. It tells
3056 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3057 containing ELF relocation info. We need this hack in order to
3058 be able to generate ELF binaries that can be translated into
3059 EFI applications (which are essentially COFF objects). Those
3060 files contain a COFF ".reloc" section inside an ELFNN object,
3061 which would normally cause BFD to segfault because it would
3062 attempt to interpret this section as containing relocation
3063 entries for section "oc". With this hack enabled, ".reloc"
3064 will be treated as a normal data section, which will avoid the
3065 segfault. However, you won't be able to create an ELFNN binary
3066 with a section named "oc" that needs relocations, but that's
3067 the kind of ugly side-effects you get when detecting section
3068 types based on their names... In practice, this limitation is
3069 unlikely to bite. */
3070 if (strcmp (name, ".reloc") == 0)
3071 hdr->sh_type = SHT_PROGBITS;
3076 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3077 executables. Rather than setting it to the beginning of the TLS
3078 section, we have to set it to the end. This function may be called
3079 multiple times, it is idempotent. */
3082 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3084 struct elf_i386_link_hash_table *htab;
3085 struct bfd_link_hash_entry *base;
3087 if (!info->executable)
3090 htab = elf_i386_hash_table (info);
3094 base = htab->tls_module_base;
3098 base->u.def.value = htab->elf.tls_size;
3101 /* Return the base VMA address which should be subtracted from real addresses
3102 when resolving @dtpoff relocation.
3103 This is PT_TLS segment p_vaddr. */
3106 elf_i386_dtpoff_base (struct bfd_link_info *info)
3108 /* If tls_sec is NULL, we should have signalled an error already. */
3109 if (elf_hash_table (info)->tls_sec == NULL)
3111 return elf_hash_table (info)->tls_sec->vma;
3114 /* Return the relocation value for @tpoff relocation
3115 if STT_TLS virtual address is ADDRESS. */
3118 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3120 struct elf_link_hash_table *htab = elf_hash_table (info);
3121 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3122 bfd_vma static_tls_size;
3124 /* If tls_sec is NULL, we should have signalled an error already. */
3125 if (htab->tls_sec == NULL)
3128 /* Consider special static TLS alignment requirements. */
3129 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3130 return static_tls_size + htab->tls_sec->vma - address;
3133 /* Relocate an i386 ELF section. */
3136 elf_i386_relocate_section (bfd *output_bfd,
3137 struct bfd_link_info *info,
3139 asection *input_section,
3141 Elf_Internal_Rela *relocs,
3142 Elf_Internal_Sym *local_syms,
3143 asection **local_sections)
3145 struct elf_i386_link_hash_table *htab;
3146 Elf_Internal_Shdr *symtab_hdr;
3147 struct elf_link_hash_entry **sym_hashes;
3148 bfd_vma *local_got_offsets;
3149 bfd_vma *local_tlsdesc_gotents;
3150 Elf_Internal_Rela *rel;
3151 Elf_Internal_Rela *relend;
3152 bfd_boolean is_vxworks_tls;
3153 unsigned plt_entry_size;
3155 BFD_ASSERT (is_i386_elf (input_bfd));
3157 htab = elf_i386_hash_table (info);
3160 symtab_hdr = &elf_symtab_hdr (input_bfd);
3161 sym_hashes = elf_sym_hashes (input_bfd);
3162 local_got_offsets = elf_local_got_offsets (input_bfd);
3163 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3164 /* We have to handle relocations in vxworks .tls_vars sections
3165 specially, because the dynamic loader is 'weird'. */
3166 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3168 && !strcmp (input_section->output_section->name,
3171 elf_i386_set_tls_module_base (info);
3173 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3176 relend = relocs + input_section->reloc_count;
3177 for (; rel < relend; rel++)
3179 unsigned int r_type;
3180 reloc_howto_type *howto;
3181 unsigned long r_symndx;
3182 struct elf_link_hash_entry *h;
3183 Elf_Internal_Sym *sym;
3185 bfd_vma off, offplt;
3187 bfd_boolean unresolved_reloc;
3188 bfd_reloc_status_type r;
3193 r_type = ELF32_R_TYPE (rel->r_info);
3194 if (r_type == R_386_GNU_VTINHERIT
3195 || r_type == R_386_GNU_VTENTRY)
3198 if ((indx = r_type) >= R_386_standard
3199 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3200 >= R_386_ext - R_386_standard)
3201 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3202 >= R_386_irelative - R_386_ext))
3204 (*_bfd_error_handler)
3205 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3206 input_bfd, input_section, r_type);
3207 bfd_set_error (bfd_error_bad_value);
3210 howto = elf_howto_table + indx;
3212 r_symndx = ELF32_R_SYM (rel->r_info);
3216 unresolved_reloc = FALSE;
3217 if (r_symndx < symtab_hdr->sh_info)
3219 sym = local_syms + r_symndx;
3220 sec = local_sections[r_symndx];
3221 relocation = (sec->output_section->vma
3222 + sec->output_offset
3224 st_size = sym->st_size;
3226 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3227 && ((sec->flags & SEC_MERGE) != 0
3228 || (info->relocatable
3229 && sec->output_offset != 0)))
3232 bfd_byte *where = contents + rel->r_offset;
3234 switch (howto->size)
3237 addend = bfd_get_8 (input_bfd, where);
3238 if (howto->pc_relative)
3240 addend = (addend ^ 0x80) - 0x80;
3245 addend = bfd_get_16 (input_bfd, where);
3246 if (howto->pc_relative)
3248 addend = (addend ^ 0x8000) - 0x8000;
3253 addend = bfd_get_32 (input_bfd, where);
3254 if (howto->pc_relative)
3256 addend = (addend ^ 0x80000000) - 0x80000000;
3264 if (info->relocatable)
3265 addend += sec->output_offset;
3268 asection *msec = sec;
3269 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3271 addend -= relocation;
3272 addend += msec->output_section->vma + msec->output_offset;
3275 switch (howto->size)
3278 /* FIXME: overflow checks. */
3279 if (howto->pc_relative)
3281 bfd_put_8 (input_bfd, addend, where);
3284 if (howto->pc_relative)
3286 bfd_put_16 (input_bfd, addend, where);
3289 if (howto->pc_relative)
3291 bfd_put_32 (input_bfd, addend, where);
3295 else if (!info->relocatable
3296 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3298 /* Relocate against local STT_GNU_IFUNC symbol. */
3299 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3304 /* Set STT_GNU_IFUNC symbol value. */
3305 h->root.u.def.value = sym->st_value;
3306 h->root.u.def.section = sec;
3311 bfd_boolean warned ATTRIBUTE_UNUSED;
3312 bfd_boolean ignored ATTRIBUTE_UNUSED;
3314 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3315 r_symndx, symtab_hdr, sym_hashes,
3317 unresolved_reloc, warned, ignored);
3321 if (sec != NULL && discarded_section (sec))
3322 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3323 rel, 1, relend, howto, 0, contents);
3325 if (info->relocatable)
3328 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3329 it here if it is defined in a non-shared object. */
3331 && h->type == STT_GNU_IFUNC
3334 asection *plt, *gotplt, *base_got;
3338 if ((input_section->flags & SEC_ALLOC) == 0
3339 || h->plt.offset == (bfd_vma) -1)
3342 /* STT_GNU_IFUNC symbol must go through PLT. */
3343 if (htab->elf.splt != NULL)
3345 plt = htab->elf.splt;
3346 gotplt = htab->elf.sgotplt;
3350 plt = htab->elf.iplt;
3351 gotplt = htab->elf.igotplt;
3354 relocation = (plt->output_section->vma
3355 + plt->output_offset + h->plt.offset);
3360 if (h->root.root.string)
3361 name = h->root.root.string;
3363 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3365 (*_bfd_error_handler)
3366 (_("%B: relocation %s against STT_GNU_IFUNC "
3367 "symbol `%s' isn't handled by %s"), input_bfd,
3368 elf_howto_table[r_type].name,
3369 name, __FUNCTION__);
3370 bfd_set_error (bfd_error_bad_value);
3374 /* Generate dynamic relcoation only when there is a
3375 non-GOT reference in a shared object. */
3376 if (info->shared && h->non_got_ref)
3378 Elf_Internal_Rela outrel;
3382 /* Need a dynamic relocation to get the real function
3384 offset = _bfd_elf_section_offset (output_bfd,
3388 if (offset == (bfd_vma) -1
3389 || offset == (bfd_vma) -2)
3392 outrel.r_offset = (input_section->output_section->vma
3393 + input_section->output_offset
3396 if (h->dynindx == -1
3398 || info->executable)
3400 /* This symbol is resolved locally. */
3401 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3402 bfd_put_32 (output_bfd,
3403 (h->root.u.def.value
3404 + h->root.u.def.section->output_section->vma
3405 + h->root.u.def.section->output_offset),
3409 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3411 sreloc = htab->elf.irelifunc;
3412 elf_append_rel (output_bfd, sreloc, &outrel);
3414 /* If this reloc is against an external symbol, we
3415 do not want to fiddle with the addend. Otherwise,
3416 we need to include the symbol value so that it
3417 becomes an addend for the dynamic reloc. For an
3418 internal symbol, we have updated addend. */
3427 base_got = htab->elf.sgot;
3428 off = h->got.offset;
3430 if (base_got == NULL)
3433 if (off == (bfd_vma) -1)
3435 /* We can't use h->got.offset here to save state, or
3436 even just remember the offset, as finish_dynamic_symbol
3437 would use that as offset into .got. */
3439 if (htab->elf.splt != NULL)
3441 plt_index = h->plt.offset / plt_entry_size - 1;
3442 off = (plt_index + 3) * 4;
3443 base_got = htab->elf.sgotplt;
3447 plt_index = h->plt.offset / plt_entry_size;
3448 off = plt_index * 4;
3449 base_got = htab->elf.igotplt;
3452 if (h->dynindx == -1
3456 /* This references the local defitionion. We must
3457 initialize this entry in the global offset table.
3458 Since the offset must always be a multiple of 8,
3459 we use the least significant bit to record
3460 whether we have initialized it already.
3462 When doing a dynamic link, we create a .rela.got
3463 relocation entry to initialize the value. This
3464 is done in the finish_dynamic_symbol routine. */
3469 bfd_put_32 (output_bfd, relocation,
3470 base_got->contents + off);
3477 /* Adjust for static executables. */
3478 if (htab->elf.splt == NULL)
3479 relocation += gotplt->output_offset;
3483 relocation = (base_got->output_section->vma
3484 + base_got->output_offset + off
3485 - gotplt->output_section->vma
3486 - gotplt->output_offset);
3487 /* Adjust for static executables. */
3488 if (htab->elf.splt == NULL)
3489 relocation += gotplt->output_offset;
3495 relocation -= (gotplt->output_section->vma
3496 + gotplt->output_offset);
3504 /* Relocation is to the entry for this symbol in the global
3506 if (htab->elf.sgot == NULL)
3513 off = h->got.offset;
3514 dyn = htab->elf.dynamic_sections_created;
3515 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3517 && SYMBOL_REFERENCES_LOCAL (info, h))
3518 || (ELF_ST_VISIBILITY (h->other)
3519 && h->root.type == bfd_link_hash_undefweak))
3521 /* This is actually a static link, or it is a
3522 -Bsymbolic link and the symbol is defined
3523 locally, or the symbol was forced to be local
3524 because of a version file. We must initialize
3525 this entry in the global offset table. Since the
3526 offset must always be a multiple of 4, we use the
3527 least significant bit to record whether we have
3528 initialized it already.
3530 When doing a dynamic link, we create a .rel.got
3531 relocation entry to initialize the value. This
3532 is done in the finish_dynamic_symbol routine. */
3537 bfd_put_32 (output_bfd, relocation,
3538 htab->elf.sgot->contents + off);
3543 unresolved_reloc = FALSE;
3547 if (local_got_offsets == NULL)
3550 off = local_got_offsets[r_symndx];
3552 /* The offset must always be a multiple of 4. We use
3553 the least significant bit to record whether we have
3554 already generated the necessary reloc. */
3559 bfd_put_32 (output_bfd, relocation,
3560 htab->elf.sgot->contents + off);
3565 Elf_Internal_Rela outrel;
3567 s = htab->elf.srelgot;
3571 outrel.r_offset = (htab->elf.sgot->output_section->vma
3572 + htab->elf.sgot->output_offset
3574 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3575 elf_append_rel (output_bfd, s, &outrel);
3578 local_got_offsets[r_symndx] |= 1;
3582 if (off >= (bfd_vma) -2)
3585 relocation = htab->elf.sgot->output_section->vma
3586 + htab->elf.sgot->output_offset + off
3587 - htab->elf.sgotplt->output_section->vma
3588 - htab->elf.sgotplt->output_offset;
3592 /* Relocation is relative to the start of the global offset
3595 /* Check to make sure it isn't a protected function symbol
3596 for shared library since it may not be local when used
3597 as function address. We also need to make sure that a
3598 symbol is defined locally. */
3599 if (info->shared && h)
3601 if (!h->def_regular)
3605 switch (ELF_ST_VISIBILITY (h->other))
3608 v = _("hidden symbol");
3611 v = _("internal symbol");
3614 v = _("protected symbol");
3621 (*_bfd_error_handler)
3622 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3623 input_bfd, v, h->root.root.string);
3624 bfd_set_error (bfd_error_bad_value);
3627 else if (!info->executable
3628 && !SYMBOLIC_BIND (info, h)
3629 && h->type == STT_FUNC
3630 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3632 (*_bfd_error_handler)
3633 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3634 input_bfd, h->root.root.string);
3635 bfd_set_error (bfd_error_bad_value);
3640 /* Note that sgot is not involved in this
3641 calculation. We always want the start of .got.plt. If we
3642 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3643 permitted by the ABI, we might have to change this
3645 relocation -= htab->elf.sgotplt->output_section->vma
3646 + htab->elf.sgotplt->output_offset;
3650 /* Use global offset table as symbol value. */
3651 relocation = htab->elf.sgotplt->output_section->vma
3652 + htab->elf.sgotplt->output_offset;
3653 unresolved_reloc = FALSE;
3657 /* Relocation is to the entry for this symbol in the
3658 procedure linkage table. */
3660 /* Resolve a PLT32 reloc against a local symbol directly,
3661 without using the procedure linkage table. */
3665 if (h->plt.offset == (bfd_vma) -1
3666 || htab->elf.splt == NULL)
3668 /* We didn't make a PLT entry for this symbol. This
3669 happens when statically linking PIC code, or when
3670 using -Bsymbolic. */
3674 relocation = (htab->elf.splt->output_section->vma
3675 + htab->elf.splt->output_offset
3677 unresolved_reloc = FALSE;
3681 /* Set to symbol size. */
3682 relocation = st_size;
3687 if ((input_section->flags & SEC_ALLOC) == 0
3693 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3694 || h->root.type != bfd_link_hash_undefweak)
3695 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3696 || !SYMBOL_CALLS_LOCAL (info, h)))
3697 || (ELIMINATE_COPY_RELOCS
3704 || h->root.type == bfd_link_hash_undefweak
3705 || h->root.type == bfd_link_hash_undefined)))
3707 Elf_Internal_Rela outrel;
3708 bfd_boolean skip, relocate;
3711 /* When generating a shared object, these relocations
3712 are copied into the output file to be resolved at run
3719 _bfd_elf_section_offset (output_bfd, info, input_section,
3721 if (outrel.r_offset == (bfd_vma) -1)
3723 else if (outrel.r_offset == (bfd_vma) -2)
3724 skip = TRUE, relocate = TRUE;
3725 outrel.r_offset += (input_section->output_section->vma
3726 + input_section->output_offset);
3729 memset (&outrel, 0, sizeof outrel);
3732 && (r_type == R_386_PC32
3734 || !SYMBOLIC_BIND (info, h)
3735 || !h->def_regular))
3736 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3739 /* This symbol is local, or marked to become local. */
3741 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3744 sreloc = elf_section_data (input_section)->sreloc;
3746 if (sreloc == NULL || sreloc->contents == NULL)
3748 r = bfd_reloc_notsupported;
3749 goto check_relocation_error;
3752 elf_append_rel (output_bfd, sreloc, &outrel);
3754 /* If this reloc is against an external symbol, we do
3755 not want to fiddle with the addend. Otherwise, we
3756 need to include the symbol value so that it becomes
3757 an addend for the dynamic reloc. */
3764 if (!info->executable)
3766 Elf_Internal_Rela outrel;
3769 outrel.r_offset = rel->r_offset
3770 + input_section->output_section->vma
3771 + input_section->output_offset;
3772 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3773 sreloc = elf_section_data (input_section)->sreloc;
3776 elf_append_rel (output_bfd, sreloc, &outrel);
3781 case R_386_TLS_GOTDESC:
3782 case R_386_TLS_DESC_CALL:
3783 case R_386_TLS_IE_32:
3784 case R_386_TLS_GOTIE:
3785 tls_type = GOT_UNKNOWN;
3786 if (h == NULL && local_got_offsets)
3787 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3789 tls_type = elf_i386_hash_entry(h)->tls_type;
3790 if (tls_type == GOT_TLS_IE)
3791 tls_type = GOT_TLS_IE_NEG;
3793 if (! elf_i386_tls_transition (info, input_bfd,
3794 input_section, contents,
3795 symtab_hdr, sym_hashes,
3796 &r_type, tls_type, rel,
3797 relend, h, r_symndx))
3800 if (r_type == R_386_TLS_LE_32)
3802 BFD_ASSERT (! unresolved_reloc);
3803 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3808 /* GD->LE transition. */
3809 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3812 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3814 movl %gs:0, %eax; subl $foo@tpoff, %eax
3815 (6 byte form of subl). */
3816 memcpy (contents + rel->r_offset - 3,
3817 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3818 roff = rel->r_offset + 5;
3822 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3824 movl %gs:0, %eax; subl $foo@tpoff, %eax
3825 (6 byte form of subl). */
3826 memcpy (contents + rel->r_offset - 2,
3827 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3828 roff = rel->r_offset + 6;
3830 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3832 /* Skip R_386_PC32/R_386_PLT32. */
3836 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3838 /* GDesc -> LE transition.
3839 It's originally something like:
3840 leal x@tlsdesc(%ebx), %eax
3844 Registers other than %eax may be set up here. */
3849 roff = rel->r_offset;
3850 val = bfd_get_8 (input_bfd, contents + roff - 1);
3852 /* Now modify the instruction as appropriate. */
3853 /* aoliva FIXME: remove the above and xor the byte
3855 bfd_put_8 (output_bfd, val ^ 0x86,
3856 contents + roff - 1);
3857 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3861 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3863 /* GDesc -> LE transition.
3871 roff = rel->r_offset;
3872 bfd_put_8 (output_bfd, 0x66, contents + roff);
3873 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3876 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3880 /* IE->LE transition:
3881 Originally it can be one of:
3889 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3892 /* movl foo, %eax. */
3893 bfd_put_8 (output_bfd, 0xb8,
3894 contents + rel->r_offset - 1);
3900 type = bfd_get_8 (input_bfd,
3901 contents + rel->r_offset - 2);
3906 bfd_put_8 (output_bfd, 0xc7,
3907 contents + rel->r_offset - 2);
3908 bfd_put_8 (output_bfd,
3909 0xc0 | ((val >> 3) & 7),
3910 contents + rel->r_offset - 1);
3914 bfd_put_8 (output_bfd, 0x81,
3915 contents + rel->r_offset - 2);
3916 bfd_put_8 (output_bfd,
3917 0xc0 | ((val >> 3) & 7),
3918 contents + rel->r_offset - 1);
3925 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3926 contents + rel->r_offset);
3931 unsigned int val, type;
3933 /* {IE_32,GOTIE}->LE transition:
3934 Originally it can be one of:
3935 subl foo(%reg1), %reg2
3936 movl foo(%reg1), %reg2
3937 addl foo(%reg1), %reg2
3940 movl $foo, %reg2 (6 byte form)
3941 addl $foo, %reg2. */
3942 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3943 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3947 bfd_put_8 (output_bfd, 0xc7,
3948 contents + rel->r_offset - 2);
3949 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3950 contents + rel->r_offset - 1);
3952 else if (type == 0x2b)
3955 bfd_put_8 (output_bfd, 0x81,
3956 contents + rel->r_offset - 2);
3957 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3958 contents + rel->r_offset - 1);
3960 else if (type == 0x03)
3963 bfd_put_8 (output_bfd, 0x81,
3964 contents + rel->r_offset - 2);
3965 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3966 contents + rel->r_offset - 1);
3970 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3971 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3972 contents + rel->r_offset);
3974 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3975 contents + rel->r_offset);
3980 if (htab->elf.sgot == NULL)
3985 off = h->got.offset;
3986 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
3990 if (local_got_offsets == NULL)
3993 off = local_got_offsets[r_symndx];
3994 offplt = local_tlsdesc_gotents[r_symndx];
4001 Elf_Internal_Rela outrel;
4005 if (htab->elf.srelgot == NULL)
4008 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4010 if (GOT_TLS_GDESC_P (tls_type))
4013 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4014 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4015 <= htab->elf.sgotplt->size);
4016 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4017 + htab->elf.sgotplt->output_offset
4019 + htab->sgotplt_jump_table_size);
4020 sreloc = htab->elf.srelplt;
4021 loc = sreloc->contents;
4022 loc += (htab->next_tls_desc_index++
4023 * sizeof (Elf32_External_Rel));
4024 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4025 <= sreloc->contents + sreloc->size);
4026 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4029 BFD_ASSERT (! unresolved_reloc);
4030 bfd_put_32 (output_bfd,
4031 relocation - elf_i386_dtpoff_base (info),
4032 htab->elf.sgotplt->contents + offplt
4033 + htab->sgotplt_jump_table_size + 4);
4037 bfd_put_32 (output_bfd, 0,
4038 htab->elf.sgotplt->contents + offplt
4039 + htab->sgotplt_jump_table_size + 4);
4043 sreloc = htab->elf.srelgot;
4045 outrel.r_offset = (htab->elf.sgot->output_section->vma
4046 + htab->elf.sgot->output_offset + off);
4048 if (GOT_TLS_GD_P (tls_type))
4049 dr_type = R_386_TLS_DTPMOD32;
4050 else if (GOT_TLS_GDESC_P (tls_type))
4052 else if (tls_type == GOT_TLS_IE_POS)
4053 dr_type = R_386_TLS_TPOFF;
4055 dr_type = R_386_TLS_TPOFF32;
4057 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4058 bfd_put_32 (output_bfd,
4059 relocation - elf_i386_dtpoff_base (info),
4060 htab->elf.sgot->contents + off);
4061 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4062 bfd_put_32 (output_bfd,
4063 elf_i386_dtpoff_base (info) - relocation,
4064 htab->elf.sgot->contents + off);
4065 else if (dr_type != R_386_TLS_DESC)
4066 bfd_put_32 (output_bfd, 0,
4067 htab->elf.sgot->contents + off);
4068 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4070 elf_append_rel (output_bfd, sreloc, &outrel);
4072 if (GOT_TLS_GD_P (tls_type))
4076 BFD_ASSERT (! unresolved_reloc);
4077 bfd_put_32 (output_bfd,
4078 relocation - elf_i386_dtpoff_base (info),
4079 htab->elf.sgot->contents + off + 4);
4083 bfd_put_32 (output_bfd, 0,
4084 htab->elf.sgot->contents + off + 4);
4085 outrel.r_info = ELF32_R_INFO (indx,
4086 R_386_TLS_DTPOFF32);
4087 outrel.r_offset += 4;
4088 elf_append_rel (output_bfd, sreloc, &outrel);
4091 else if (tls_type == GOT_TLS_IE_BOTH)
4093 bfd_put_32 (output_bfd,
4095 ? relocation - elf_i386_dtpoff_base (info)
4097 htab->elf.sgot->contents + off + 4);
4098 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4099 outrel.r_offset += 4;
4100 elf_append_rel (output_bfd, sreloc, &outrel);
4107 local_got_offsets[r_symndx] |= 1;
4110 if (off >= (bfd_vma) -2
4111 && ! GOT_TLS_GDESC_P (tls_type))
4113 if (r_type == R_386_TLS_GOTDESC
4114 || r_type == R_386_TLS_DESC_CALL)
4116 relocation = htab->sgotplt_jump_table_size + offplt;
4117 unresolved_reloc = FALSE;
4119 else if (r_type == ELF32_R_TYPE (rel->r_info))
4121 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4122 + htab->elf.sgotplt->output_offset;
4123 relocation = htab->elf.sgot->output_section->vma
4124 + htab->elf.sgot->output_offset + off - g_o_t;
4125 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4126 && tls_type == GOT_TLS_IE_BOTH)
4128 if (r_type == R_386_TLS_IE)
4129 relocation += g_o_t;
4130 unresolved_reloc = FALSE;
4132 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4134 unsigned int val, type;
4137 /* GD->IE transition. */
4138 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4139 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4142 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4144 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4146 roff = rel->r_offset - 3;
4150 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4152 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4153 roff = rel->r_offset - 2;
4155 memcpy (contents + roff,
4156 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4157 contents[roff + 7] = 0x80 | (val & 7);
4158 /* If foo is used only with foo@gotntpoff(%reg) and
4159 foo@indntpoff, but not with foo@gottpoff(%reg), change
4160 subl $foo@gottpoff(%reg), %eax
4162 addl $foo@gotntpoff(%reg), %eax. */
4163 if (tls_type == GOT_TLS_IE_POS)
4164 contents[roff + 6] = 0x03;
4165 bfd_put_32 (output_bfd,
4166 htab->elf.sgot->output_section->vma
4167 + htab->elf.sgot->output_offset + off
4168 - htab->elf.sgotplt->output_section->vma
4169 - htab->elf.sgotplt->output_offset,
4170 contents + roff + 8);
4171 /* Skip R_386_PLT32. */
4175 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4177 /* GDesc -> IE transition.
4178 It's originally something like:
4179 leal x@tlsdesc(%ebx), %eax
4182 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4184 movl x@gottpoff(%ebx), %eax # before negl %eax
4186 Registers other than %eax may be set up here. */
4190 /* First, make sure it's a leal adding ebx to a 32-bit
4191 offset into any register, although it's probably
4192 almost always going to be eax. */
4193 roff = rel->r_offset;
4195 /* Now modify the instruction as appropriate. */
4196 /* To turn a leal into a movl in the form we use it, it
4197 suffices to change the first byte from 0x8d to 0x8b.
4198 aoliva FIXME: should we decide to keep the leal, all
4199 we have to do is remove the statement below, and
4200 adjust the relaxation of R_386_TLS_DESC_CALL. */
4201 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4203 if (tls_type == GOT_TLS_IE_BOTH)
4206 bfd_put_32 (output_bfd,
4207 htab->elf.sgot->output_section->vma
4208 + htab->elf.sgot->output_offset + off
4209 - htab->elf.sgotplt->output_section->vma
4210 - htab->elf.sgotplt->output_offset,
4214 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4216 /* GDesc -> IE transition.
4224 depending on how we transformed the TLS_GOTDESC above.
4229 roff = rel->r_offset;
4231 /* Now modify the instruction as appropriate. */
4232 if (tls_type != GOT_TLS_IE_NEG)
4235 bfd_put_8 (output_bfd, 0x66, contents + roff);
4236 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4241 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4242 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4252 if (! elf_i386_tls_transition (info, input_bfd,
4253 input_section, contents,
4254 symtab_hdr, sym_hashes,
4255 &r_type, GOT_UNKNOWN, rel,
4256 relend, h, r_symndx))
4259 if (r_type != R_386_TLS_LDM)
4261 /* LD->LE transition:
4262 leal foo(%reg), %eax; call ___tls_get_addr.
4264 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4265 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4266 memcpy (contents + rel->r_offset - 2,
4267 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4268 /* Skip R_386_PC32/R_386_PLT32. */
4273 if (htab->elf.sgot == NULL)
4276 off = htab->tls_ldm_got.offset;
4281 Elf_Internal_Rela outrel;
4283 if (htab->elf.srelgot == NULL)
4286 outrel.r_offset = (htab->elf.sgot->output_section->vma
4287 + htab->elf.sgot->output_offset + off);
4289 bfd_put_32 (output_bfd, 0,
4290 htab->elf.sgot->contents + off);
4291 bfd_put_32 (output_bfd, 0,
4292 htab->elf.sgot->contents + off + 4);
4293 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4294 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4295 htab->tls_ldm_got.offset |= 1;
4297 relocation = htab->elf.sgot->output_section->vma
4298 + htab->elf.sgot->output_offset + off
4299 - htab->elf.sgotplt->output_section->vma
4300 - htab->elf.sgotplt->output_offset;
4301 unresolved_reloc = FALSE;
4304 case R_386_TLS_LDO_32:
4305 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
4306 relocation -= elf_i386_dtpoff_base (info);
4308 /* When converting LDO to LE, we must negate. */
4309 relocation = -elf_i386_tpoff (info, relocation);
4312 case R_386_TLS_LE_32:
4314 if (!info->executable)
4316 Elf_Internal_Rela outrel;
4319 outrel.r_offset = rel->r_offset
4320 + input_section->output_section->vma
4321 + input_section->output_offset;
4322 if (h != NULL && h->dynindx != -1)
4326 if (r_type == R_386_TLS_LE_32)
4327 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4329 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4330 sreloc = elf_section_data (input_section)->sreloc;
4333 elf_append_rel (output_bfd, sreloc, &outrel);
4336 else if (r_type == R_386_TLS_LE_32)
4337 relocation = elf_i386_dtpoff_base (info) - relocation;
4339 relocation -= elf_i386_dtpoff_base (info);
4341 else if (r_type == R_386_TLS_LE_32)
4342 relocation = elf_i386_tpoff (info, relocation);
4344 relocation = -elf_i386_tpoff (info, relocation);
4351 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4352 because such sections are not SEC_ALLOC and thus ld.so will
4353 not process them. */
4354 if (unresolved_reloc
4355 && !((input_section->flags & SEC_DEBUGGING) != 0
4357 && _bfd_elf_section_offset (output_bfd, info, input_section,
4358 rel->r_offset) != (bfd_vma) -1)
4360 (*_bfd_error_handler)
4361 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4364 (long) rel->r_offset,
4366 h->root.root.string);
4371 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4372 contents, rel->r_offset,
4375 check_relocation_error:
4376 if (r != bfd_reloc_ok)
4381 name = h->root.root.string;
4384 name = bfd_elf_string_from_elf_section (input_bfd,
4385 symtab_hdr->sh_link,
4390 name = bfd_section_name (input_bfd, sec);
4393 if (r == bfd_reloc_overflow)
4395 if (! ((*info->callbacks->reloc_overflow)
4396 (info, (h ? &h->root : NULL), name, howto->name,
4397 (bfd_vma) 0, input_bfd, input_section,
4403 (*_bfd_error_handler)
4404 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4405 input_bfd, input_section,
4406 (long) rel->r_offset, name, (int) r);
4415 /* Finish up dynamic symbol handling. We set the contents of various
4416 dynamic sections here. */
4419 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4420 struct bfd_link_info *info,
4421 struct elf_link_hash_entry *h,
4422 Elf_Internal_Sym *sym)
4424 struct elf_i386_link_hash_table *htab;
4425 unsigned plt_entry_size;
4426 const struct elf_i386_backend_data *abed;
4428 htab = elf_i386_hash_table (info);
4432 abed = get_elf_i386_backend_data (output_bfd);
4433 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
4435 if (h->plt.offset != (bfd_vma) -1)
4439 Elf_Internal_Rela rel;
4441 asection *plt, *gotplt, *relplt;
4443 /* When building a static executable, use .iplt, .igot.plt and
4444 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4445 if (htab->elf.splt != NULL)
4447 plt = htab->elf.splt;
4448 gotplt = htab->elf.sgotplt;
4449 relplt = htab->elf.srelplt;
4453 plt = htab->elf.iplt;
4454 gotplt = htab->elf.igotplt;
4455 relplt = htab->elf.irelplt;
4458 /* This symbol has an entry in the procedure linkage table. Set
4461 if ((h->dynindx == -1
4462 && !((h->forced_local || info->executable)
4464 && h->type == STT_GNU_IFUNC))
4470 /* Get the index in the procedure linkage table which
4471 corresponds to this symbol. This is the index of this symbol
4472 in all the symbols for which we are making plt entries. The
4473 first entry in the procedure linkage table is reserved.
4475 Get the offset into the .got table of the entry that
4476 corresponds to this function. Each .got entry is 4 bytes.
4477 The first three are reserved.
4479 For static executables, we don't reserve anything. */
4481 if (plt == htab->elf.splt)
4483 got_offset = h->plt.offset / plt_entry_size - 1;
4484 got_offset = (got_offset + 3) * 4;
4488 got_offset = h->plt.offset / plt_entry_size;
4489 got_offset = got_offset * 4;
4492 /* Fill in the entry in the procedure linkage table. */
4495 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
4496 abed->plt->plt_entry_size);
4497 bfd_put_32 (output_bfd,
4498 (gotplt->output_section->vma
4499 + gotplt->output_offset
4501 plt->contents + h->plt.offset
4502 + abed->plt->plt_got_offset);
4504 if (abed->is_vxworks)
4506 int s, k, reloc_index;
4508 /* Create the R_386_32 relocation referencing the GOT
4509 for this PLT entry. */
4511 /* S: Current slot number (zero-based). */
4512 s = ((h->plt.offset - abed->plt->plt_entry_size)
4513 / abed->plt->plt_entry_size);
4514 /* K: Number of relocations for PLTResolve. */
4516 k = PLTRESOLVE_RELOCS_SHLIB;
4518 k = PLTRESOLVE_RELOCS;
4519 /* Skip the PLTresolve relocations, and the relocations for
4520 the other PLT slots. */
4521 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4522 loc = (htab->srelplt2->contents + reloc_index
4523 * sizeof (Elf32_External_Rel));
4525 rel.r_offset = (htab->elf.splt->output_section->vma
4526 + htab->elf.splt->output_offset
4527 + h->plt.offset + 2),
4528 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4529 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4531 /* Create the R_386_32 relocation referencing the beginning of
4532 the PLT for this GOT entry. */
4533 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4534 + htab->elf.sgotplt->output_offset
4536 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4537 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4538 loc + sizeof (Elf32_External_Rel));
4543 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
4544 abed->plt->plt_entry_size);
4545 bfd_put_32 (output_bfd, got_offset,
4546 plt->contents + h->plt.offset
4547 + abed->plt->plt_got_offset);
4550 /* Fill in the entry in the global offset table. */
4551 bfd_put_32 (output_bfd,
4552 (plt->output_section->vma
4553 + plt->output_offset
4555 + abed->plt->plt_lazy_offset),
4556 gotplt->contents + got_offset);
4558 /* Fill in the entry in the .rel.plt section. */
4559 rel.r_offset = (gotplt->output_section->vma
4560 + gotplt->output_offset
4562 if (h->dynindx == -1
4563 || ((info->executable
4564 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4566 && h->type == STT_GNU_IFUNC))
4568 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4569 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4570 in the .got.plt section. */
4571 bfd_put_32 (output_bfd,
4572 (h->root.u.def.value
4573 + h->root.u.def.section->output_section->vma
4574 + h->root.u.def.section->output_offset),
4575 gotplt->contents + got_offset);
4576 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4577 /* R_386_IRELATIVE comes last. */
4578 plt_index = htab->next_irelative_index--;
4582 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4583 plt_index = htab->next_jump_slot_index++;
4585 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4586 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4588 /* Don't fill PLT entry for static executables. */
4589 if (plt == htab->elf.splt)
4591 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4592 plt->contents + h->plt.offset
4593 + abed->plt->plt_reloc_offset);
4594 bfd_put_32 (output_bfd, - (h->plt.offset
4595 + abed->plt->plt_plt_offset + 4),
4596 plt->contents + h->plt.offset
4597 + abed->plt->plt_plt_offset);
4600 if (!h->def_regular)
4602 /* Mark the symbol as undefined, rather than as defined in
4603 the .plt section. Leave the value if there were any
4604 relocations where pointer equality matters (this is a clue
4605 for the dynamic linker, to make function pointer
4606 comparisons work between an application and shared
4607 library), otherwise set it to zero. If a function is only
4608 called from a binary, there is no need to slow down
4609 shared libraries because of that. */
4610 sym->st_shndx = SHN_UNDEF;
4611 if (!h->pointer_equality_needed)
4616 if (h->got.offset != (bfd_vma) -1
4617 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4618 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4620 Elf_Internal_Rela rel;
4622 /* This symbol has an entry in the global offset table. Set it
4625 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4628 rel.r_offset = (htab->elf.sgot->output_section->vma
4629 + htab->elf.sgot->output_offset
4630 + (h->got.offset & ~(bfd_vma) 1));
4632 /* If this is a static link, or it is a -Bsymbolic link and the
4633 symbol is defined locally or was forced to be local because
4634 of a version file, we just want to emit a RELATIVE reloc.
4635 The entry in the global offset table will already have been
4636 initialized in the relocate_section function. */
4638 && h->type == STT_GNU_IFUNC)
4642 /* Generate R_386_GLOB_DAT. */
4649 if (!h->pointer_equality_needed)
4652 /* For non-shared object, we can't use .got.plt, which
4653 contains the real function addres if we need pointer
4654 equality. We load the GOT entry with the PLT entry. */
4655 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4656 bfd_put_32 (output_bfd,
4657 (plt->output_section->vma
4658 + plt->output_offset + h->plt.offset),
4659 htab->elf.sgot->contents + h->got.offset);
4663 else if (info->shared
4664 && SYMBOL_REFERENCES_LOCAL (info, h))
4666 BFD_ASSERT((h->got.offset & 1) != 0);
4667 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4671 BFD_ASSERT((h->got.offset & 1) == 0);
4673 bfd_put_32 (output_bfd, (bfd_vma) 0,
4674 htab->elf.sgot->contents + h->got.offset);
4675 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4678 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
4683 Elf_Internal_Rela rel;
4685 /* This symbol needs a copy reloc. Set it up. */
4687 if (h->dynindx == -1
4688 || (h->root.type != bfd_link_hash_defined
4689 && h->root.type != bfd_link_hash_defweak)
4690 || htab->srelbss == NULL)
4693 rel.r_offset = (h->root.u.def.value
4694 + h->root.u.def.section->output_section->vma
4695 + h->root.u.def.section->output_offset);
4696 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4697 elf_append_rel (output_bfd, htab->srelbss, &rel);
4703 /* Finish up local dynamic symbol handling. We set the contents of
4704 various dynamic sections here. */
4707 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4709 struct elf_link_hash_entry *h
4710 = (struct elf_link_hash_entry *) *slot;
4711 struct bfd_link_info *info
4712 = (struct bfd_link_info *) inf;
4714 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4718 /* Used to decide how to sort relocs in an optimal manner for the
4719 dynamic linker, before writing them out. */
4721 static enum elf_reloc_type_class
4722 elf_i386_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4723 const asection *rel_sec ATTRIBUTE_UNUSED,
4724 const Elf_Internal_Rela *rela)
4726 switch (ELF32_R_TYPE (rela->r_info))
4728 case R_386_RELATIVE:
4729 return reloc_class_relative;
4730 case R_386_JUMP_SLOT:
4731 return reloc_class_plt;
4733 return reloc_class_copy;
4735 return reloc_class_normal;
4739 /* Finish up the dynamic sections. */
4742 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4743 struct bfd_link_info *info)
4745 struct elf_i386_link_hash_table *htab;
4748 const struct elf_i386_backend_data *abed;
4750 htab = elf_i386_hash_table (info);
4754 dynobj = htab->elf.dynobj;
4755 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4756 abed = get_elf_i386_backend_data (output_bfd);
4758 if (htab->elf.dynamic_sections_created)
4760 Elf32_External_Dyn *dyncon, *dynconend;
4762 if (sdyn == NULL || htab->elf.sgot == NULL)
4765 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4766 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4767 for (; dyncon < dynconend; dyncon++)
4769 Elf_Internal_Dyn dyn;
4772 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4777 if (abed->is_vxworks
4778 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4783 s = htab->elf.sgotplt;
4784 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4788 s = htab->elf.srelplt;
4789 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4793 s = htab->elf.srelplt;
4794 dyn.d_un.d_val = s->size;
4798 /* My reading of the SVR4 ABI indicates that the
4799 procedure linkage table relocs (DT_JMPREL) should be
4800 included in the overall relocs (DT_REL). This is
4801 what Solaris does. However, UnixWare can not handle
4802 that case. Therefore, we override the DT_RELSZ entry
4803 here to make it not include the JMPREL relocs. */
4804 s = htab->elf.srelplt;
4807 dyn.d_un.d_val -= s->size;
4811 /* We may not be using the standard ELF linker script.
4812 If .rel.plt is the first .rel section, we adjust
4813 DT_REL to not include it. */
4814 s = htab->elf.srelplt;
4817 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4819 dyn.d_un.d_ptr += s->size;
4823 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4826 /* Fill in the first entry in the procedure linkage table. */
4827 if (htab->elf.splt && htab->elf.splt->size > 0)
4831 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
4832 abed->plt->plt0_entry_size);
4833 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
4834 abed->plt0_pad_byte,
4835 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
4839 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
4840 abed->plt->plt0_entry_size);
4841 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
4842 abed->plt0_pad_byte,
4843 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
4844 bfd_put_32 (output_bfd,
4845 (htab->elf.sgotplt->output_section->vma
4846 + htab->elf.sgotplt->output_offset
4848 htab->elf.splt->contents
4849 + abed->plt->plt0_got1_offset);
4850 bfd_put_32 (output_bfd,
4851 (htab->elf.sgotplt->output_section->vma
4852 + htab->elf.sgotplt->output_offset
4854 htab->elf.splt->contents
4855 + abed->plt->plt0_got2_offset);
4857 if (abed->is_vxworks)
4859 Elf_Internal_Rela rel;
4861 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4862 On IA32 we use REL relocations so the addend goes in
4863 the PLT directly. */
4864 rel.r_offset = (htab->elf.splt->output_section->vma
4865 + htab->elf.splt->output_offset
4866 + abed->plt->plt0_got1_offset);
4867 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4868 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4869 htab->srelplt2->contents);
4870 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4871 rel.r_offset = (htab->elf.splt->output_section->vma
4872 + htab->elf.splt->output_offset
4873 + abed->plt->plt0_got2_offset);
4874 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4875 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4876 htab->srelplt2->contents +
4877 sizeof (Elf32_External_Rel));
4881 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4882 really seem like the right value. */
4883 elf_section_data (htab->elf.splt->output_section)
4884 ->this_hdr.sh_entsize = 4;
4886 /* Correct the .rel.plt.unloaded relocations. */
4887 if (abed->is_vxworks && !info->shared)
4889 int num_plts = (htab->elf.splt->size
4890 / abed->plt->plt_entry_size) - 1;
4893 p = htab->srelplt2->contents;
4895 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4897 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4899 for (; num_plts; num_plts--)
4901 Elf_Internal_Rela rel;
4902 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4903 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4904 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4905 p += sizeof (Elf32_External_Rel);
4907 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4908 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4909 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4910 p += sizeof (Elf32_External_Rel);
4916 if (htab->elf.sgotplt)
4918 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4920 (*_bfd_error_handler)
4921 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4925 /* Fill in the first three entries in the global offset table. */
4926 if (htab->elf.sgotplt->size > 0)
4928 bfd_put_32 (output_bfd,
4930 : sdyn->output_section->vma + sdyn->output_offset),
4931 htab->elf.sgotplt->contents);
4932 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4933 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
4936 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
4939 /* Adjust .eh_frame for .plt section. */
4940 if (htab->plt_eh_frame != NULL
4941 && htab->plt_eh_frame->contents != NULL)
4943 if (htab->elf.splt != NULL
4944 && htab->elf.splt->size != 0
4945 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4946 && htab->elf.splt->output_section != NULL
4947 && htab->plt_eh_frame->output_section != NULL)
4949 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4950 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4951 + htab->plt_eh_frame->output_offset
4952 + PLT_FDE_START_OFFSET;
4953 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4954 htab->plt_eh_frame->contents
4955 + PLT_FDE_START_OFFSET);
4957 if (htab->plt_eh_frame->sec_info_type
4958 == SEC_INFO_TYPE_EH_FRAME)
4960 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4962 htab->plt_eh_frame->contents))
4967 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4968 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
4970 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4971 htab_traverse (htab->loc_hash_table,
4972 elf_i386_finish_local_dynamic_symbol,
4978 /* Return address for Ith PLT stub in section PLT, for relocation REL
4979 or (bfd_vma) -1 if it should not be included. */
4982 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
4983 const arelent *rel ATTRIBUTE_UNUSED)
4985 return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner);
4988 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4991 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
4993 if (h->plt.offset != (bfd_vma) -1
4995 && !h->pointer_equality_needed)
4998 return _bfd_elf_hash_symbol (h);
5001 /* Hook called by the linker routine which adds symbols from an object
5005 elf_i386_add_symbol_hook (bfd * abfd,
5006 struct bfd_link_info * info ATTRIBUTE_UNUSED,
5007 Elf_Internal_Sym * sym,
5008 const char ** namep ATTRIBUTE_UNUSED,
5009 flagword * flagsp ATTRIBUTE_UNUSED,
5010 asection ** secp ATTRIBUTE_UNUSED,
5011 bfd_vma * valp ATTRIBUTE_UNUSED)
5013 if ((abfd->flags & DYNAMIC) == 0
5014 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
5015 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
5016 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
5021 #define TARGET_LITTLE_SYM i386_elf32_vec
5022 #define TARGET_LITTLE_NAME "elf32-i386"
5023 #define ELF_ARCH bfd_arch_i386
5024 #define ELF_TARGET_ID I386_ELF_DATA
5025 #define ELF_MACHINE_CODE EM_386
5026 #define ELF_MAXPAGESIZE 0x1000
5028 #define elf_backend_can_gc_sections 1
5029 #define elf_backend_can_refcount 1
5030 #define elf_backend_want_got_plt 1
5031 #define elf_backend_plt_readonly 1
5032 #define elf_backend_want_plt_sym 0
5033 #define elf_backend_got_header_size 12
5034 #define elf_backend_plt_alignment 4
5036 /* Support RELA for objdump of prelink objects. */
5037 #define elf_info_to_howto elf_i386_info_to_howto_rel
5038 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5040 #define bfd_elf32_mkobject elf_i386_mkobject
5042 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5043 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5044 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
5045 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5046 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5048 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5049 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5050 #define elf_backend_check_relocs elf_i386_check_relocs
5051 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5052 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5053 #define elf_backend_fake_sections elf_i386_fake_sections
5054 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5055 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5056 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5057 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5058 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5059 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5060 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5061 #define elf_backend_relocate_section elf_i386_relocate_section
5062 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5063 #define elf_backend_always_size_sections elf_i386_always_size_sections
5064 #define elf_backend_omit_section_dynsym \
5065 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5066 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
5067 #define elf_backend_hash_symbol elf_i386_hash_symbol
5068 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5070 #include "elf32-target.h"
5072 /* FreeBSD support. */
5074 #undef TARGET_LITTLE_SYM
5075 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5076 #undef TARGET_LITTLE_NAME
5077 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5079 #define ELF_OSABI ELFOSABI_FREEBSD
5081 /* The kernel recognizes executables as valid only if they carry a
5082 "FreeBSD" label in the ELF header. So we put this label on all
5083 executables and (for simplicity) also all other object files. */
5086 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5088 _bfd_elf_post_process_headers (abfd, info);
5090 #ifdef OLD_FREEBSD_ABI_LABEL
5091 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5092 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5096 #undef elf_backend_post_process_headers
5097 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5099 #define elf32_bed elf32_i386_fbsd_bed
5101 #undef elf_backend_add_symbol_hook
5103 #include "elf32-target.h"
5107 #undef TARGET_LITTLE_SYM
5108 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5109 #undef TARGET_LITTLE_NAME
5110 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5112 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5113 objects won't be recognized. */
5117 #define elf32_bed elf32_i386_sol2_bed
5119 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5121 #undef elf_backend_static_tls_alignment
5122 #define elf_backend_static_tls_alignment 8
5124 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5126 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5128 #undef elf_backend_want_plt_sym
5129 #define elf_backend_want_plt_sym 1
5131 #include "elf32-target.h"
5133 /* Native Client support. */
5135 #undef TARGET_LITTLE_SYM
5136 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5137 #undef TARGET_LITTLE_NAME
5138 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5140 #define elf32_bed elf32_i386_nacl_bed
5142 #undef ELF_MAXPAGESIZE
5143 #define ELF_MAXPAGESIZE 0x10000
5145 /* Restore defaults. */
5147 #undef elf_backend_want_plt_sym
5148 #define elf_backend_want_plt_sym 0
5149 #undef elf_backend_post_process_headers
5150 #undef elf_backend_static_tls_alignment
5152 /* NaCl uses substantially different PLT entries for the same effects. */
5154 #undef elf_backend_plt_alignment
5155 #define elf_backend_plt_alignment 5
5156 #define NACL_PLT_ENTRY_SIZE 64
5157 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5159 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5161 0xff, 0x35, /* pushl contents of address */
5162 0, 0, 0, 0, /* replaced with address of .got + 4. */
5163 0x8b, 0x0d, /* movl contents of address, %ecx */
5164 0, 0, 0, 0, /* replaced with address of .got + 8. */
5165 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5166 0xff, 0xe1 /* jmp *%ecx */
5169 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5171 0x8b, 0x0d, /* movl contents of address, %ecx */
5172 0, 0, 0, 0, /* replaced with GOT slot address. */
5173 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5174 0xff, 0xe1, /* jmp *%ecx */
5176 /* Pad to the next 32-byte boundary with nop instructions. */
5178 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5179 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5181 /* Lazy GOT entries point here (32-byte aligned). */
5182 0x68, /* pushl immediate */
5183 0, 0, 0, 0, /* replaced with reloc offset. */
5184 0xe9, /* jmp relative */
5185 0, 0, 0, 0, /* replaced with offset to .plt. */
5187 /* Pad to the next 32-byte boundary with nop instructions. */
5188 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5189 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5193 static const bfd_byte
5194 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5196 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5197 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5198 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5199 0xff, 0xe1, /* jmp *%ecx */
5201 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5202 so pad to that size with nop instructions. */
5203 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5206 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5208 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5209 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5210 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5211 0xff, 0xe1, /* jmp *%ecx */
5213 /* Pad to the next 32-byte boundary with nop instructions. */
5215 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5216 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5218 /* Lazy GOT entries point here (32-byte aligned). */
5219 0x68, /* pushl immediate */
5220 0, 0, 0, 0, /* replaced with offset into relocation table. */
5221 0xe9, /* jmp relative */
5222 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5224 /* Pad to the next 32-byte boundary with nop instructions. */
5225 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5226 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5230 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5232 #if (PLT_CIE_LENGTH != 20 \
5233 || PLT_FDE_LENGTH != 36 \
5234 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5235 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5236 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5238 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5239 0, 0, 0, 0, /* CIE ID */
5240 1, /* CIE version */
5241 'z', 'R', 0, /* Augmentation string */
5242 1, /* Code alignment factor */
5243 0x7c, /* Data alignment factor: -4 */
5244 8, /* Return address column */
5245 1, /* Augmentation size */
5246 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5247 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5248 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5249 DW_CFA_nop, DW_CFA_nop,
5251 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5252 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5253 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5254 0, 0, 0, 0, /* .plt size goes here */
5255 0, /* Augmentation size */
5256 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5257 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5258 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5259 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5260 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5261 13, /* Block length */
5262 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5263 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5264 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5265 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5266 DW_CFA_nop, DW_CFA_nop
5269 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
5271 elf_i386_nacl_plt0_entry, /* plt0_entry */
5272 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5273 2, /* plt0_got1_offset */
5274 8, /* plt0_got2_offset */
5275 elf_i386_nacl_plt_entry, /* plt_entry */
5276 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5277 2, /* plt_got_offset */
5278 33, /* plt_reloc_offset */
5279 38, /* plt_plt_offset */
5280 32, /* plt_lazy_offset */
5281 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5282 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5283 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5284 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
5287 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5289 &elf_i386_nacl_plt, /* plt */
5290 0x90, /* plt0_pad_byte: nop insn */
5295 elf32_i386_nacl_elf_object_p (bfd *abfd)
5297 /* Set the right machine number for a NaCl i386 ELF32 file. */
5298 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
5302 #undef elf_backend_arch_data
5303 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5305 #undef elf_backend_object_p
5306 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5307 #undef elf_backend_modify_segment_map
5308 #define elf_backend_modify_segment_map nacl_modify_segment_map
5309 #undef elf_backend_modify_program_headers
5310 #define elf_backend_modify_program_headers nacl_modify_program_headers
5311 #undef elf_backend_final_write_processing
5312 #define elf_backend_final_write_processing nacl_final_write_processing
5314 #include "elf32-target.h"
5316 /* Restore defaults. */
5317 #undef elf_backend_object_p
5318 #undef elf_backend_modify_segment_map
5319 #undef elf_backend_modify_program_headers
5320 #undef elf_backend_final_write_processing
5322 /* VxWorks support. */
5324 #undef TARGET_LITTLE_SYM
5325 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5326 #undef TARGET_LITTLE_NAME
5327 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5329 #undef elf_backend_plt_alignment
5330 #define elf_backend_plt_alignment 4
5332 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5334 &elf_i386_plt, /* plt */
5335 0x90, /* plt0_pad_byte */
5339 #undef elf_backend_arch_data
5340 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5342 #undef elf_backend_relocs_compatible
5343 #undef elf_backend_add_symbol_hook
5344 #define elf_backend_add_symbol_hook \
5345 elf_vxworks_add_symbol_hook
5346 #undef elf_backend_link_output_symbol_hook
5347 #define elf_backend_link_output_symbol_hook \
5348 elf_vxworks_link_output_symbol_hook
5349 #undef elf_backend_emit_relocs
5350 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5351 #undef elf_backend_final_write_processing
5352 #define elf_backend_final_write_processing \
5353 elf_vxworks_final_write_processing
5354 #undef elf_backend_static_tls_alignment
5356 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5358 #undef elf_backend_want_plt_sym
5359 #define elf_backend_want_plt_sym 1
5362 #define elf32_bed elf32_i386_vxworks_bed
5364 #include "elf32-target.h"