1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2017 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
32 #include "opcode/i386.h"
34 /* 386 uses REL relocations instead of RELA. */
39 static reloc_howto_type elf_howto_table[]=
41 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
42 bfd_elf_generic_reloc, "R_386_NONE",
43 TRUE, 0x00000000, 0x00000000, FALSE),
44 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
45 bfd_elf_generic_reloc, "R_386_32",
46 TRUE, 0xffffffff, 0xffffffff, FALSE),
47 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
48 bfd_elf_generic_reloc, "R_386_PC32",
49 TRUE, 0xffffffff, 0xffffffff, TRUE),
50 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
51 bfd_elf_generic_reloc, "R_386_GOT32",
52 TRUE, 0xffffffff, 0xffffffff, FALSE),
53 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
54 bfd_elf_generic_reloc, "R_386_PLT32",
55 TRUE, 0xffffffff, 0xffffffff, TRUE),
56 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
57 bfd_elf_generic_reloc, "R_386_COPY",
58 TRUE, 0xffffffff, 0xffffffff, FALSE),
59 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
61 TRUE, 0xffffffff, 0xffffffff, FALSE),
62 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
64 TRUE, 0xffffffff, 0xffffffff, FALSE),
65 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_386_RELATIVE",
67 TRUE, 0xffffffff, 0xffffffff, FALSE),
68 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_386_GOTOFF",
70 TRUE, 0xffffffff, 0xffffffff, FALSE),
71 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_386_GOTPC",
73 TRUE, 0xffffffff, 0xffffffff, TRUE),
75 /* We have a gap in the reloc numbers here.
76 R_386_standard counts the number up to this point, and
77 R_386_ext_offset is the value to subtract from a reloc type of
78 R_386_16 thru R_386_PC8 to form an index into this table. */
79 #define R_386_standard (R_386_GOTPC + 1)
80 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
82 /* These relocs are a GNU extension. */
83 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
85 TRUE, 0xffffffff, 0xffffffff, FALSE),
86 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_386_TLS_IE",
88 TRUE, 0xffffffff, 0xffffffff, FALSE),
89 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
91 TRUE, 0xffffffff, 0xffffffff, FALSE),
92 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_386_TLS_LE",
94 TRUE, 0xffffffff, 0xffffffff, FALSE),
95 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_386_TLS_GD",
97 TRUE, 0xffffffff, 0xffffffff, FALSE),
98 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_386_TLS_LDM",
100 TRUE, 0xffffffff, 0xffffffff, FALSE),
101 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_386_16",
103 TRUE, 0xffff, 0xffff, FALSE),
104 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_386_PC16",
106 TRUE, 0xffff, 0xffff, TRUE),
107 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_386_8",
109 TRUE, 0xff, 0xff, FALSE),
110 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
111 bfd_elf_generic_reloc, "R_386_PC8",
112 TRUE, 0xff, 0xff, TRUE),
114 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
115 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
116 /* These are common with Solaris TLS implementation. */
117 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
119 TRUE, 0xffffffff, 0xffffffff, FALSE),
120 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
122 TRUE, 0xffffffff, 0xffffffff, FALSE),
123 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
125 TRUE, 0xffffffff, 0xffffffff, FALSE),
126 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
128 TRUE, 0xffffffff, 0xffffffff, FALSE),
129 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
131 TRUE, 0xffffffff, 0xffffffff, FALSE),
132 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
134 TRUE, 0xffffffff, 0xffffffff, FALSE),
135 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
136 bfd_elf_generic_reloc, "R_386_SIZE32",
137 TRUE, 0xffffffff, 0xffffffff, FALSE),
138 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
140 TRUE, 0xffffffff, 0xffffffff, FALSE),
141 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
142 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
144 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_386_TLS_DESC",
146 TRUE, 0xffffffff, 0xffffffff, FALSE),
147 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_386_IRELATIVE",
149 TRUE, 0xffffffff, 0xffffffff, FALSE),
150 HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_386_GOT32X",
152 TRUE, 0xffffffff, 0xffffffff, FALSE),
155 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
156 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
158 /* GNU extension to record C++ vtable hierarchy. */
159 HOWTO (R_386_GNU_VTINHERIT, /* type */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
163 FALSE, /* pc_relative */
165 complain_overflow_dont, /* complain_on_overflow */
166 NULL, /* special_function */
167 "R_386_GNU_VTINHERIT", /* name */
168 FALSE, /* partial_inplace */
171 FALSE), /* pcrel_offset */
173 /* GNU extension to record C++ vtable member usage. */
174 HOWTO (R_386_GNU_VTENTRY, /* type */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
178 FALSE, /* pc_relative */
180 complain_overflow_dont, /* complain_on_overflow */
181 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
182 "R_386_GNU_VTENTRY", /* name */
183 FALSE, /* partial_inplace */
186 FALSE) /* pcrel_offset */
188 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
192 #ifdef DEBUG_GEN_RELOC
194 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
199 static reloc_howto_type *
200 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
201 bfd_reloc_code_real_type code)
206 TRACE ("BFD_RELOC_NONE");
207 return &elf_howto_table[R_386_NONE];
210 TRACE ("BFD_RELOC_32");
211 return &elf_howto_table[R_386_32];
214 TRACE ("BFD_RELOC_CTOR");
215 return &elf_howto_table[R_386_32];
217 case BFD_RELOC_32_PCREL:
218 TRACE ("BFD_RELOC_PC32");
219 return &elf_howto_table[R_386_PC32];
221 case BFD_RELOC_386_GOT32:
222 TRACE ("BFD_RELOC_386_GOT32");
223 return &elf_howto_table[R_386_GOT32];
225 case BFD_RELOC_386_PLT32:
226 TRACE ("BFD_RELOC_386_PLT32");
227 return &elf_howto_table[R_386_PLT32];
229 case BFD_RELOC_386_COPY:
230 TRACE ("BFD_RELOC_386_COPY");
231 return &elf_howto_table[R_386_COPY];
233 case BFD_RELOC_386_GLOB_DAT:
234 TRACE ("BFD_RELOC_386_GLOB_DAT");
235 return &elf_howto_table[R_386_GLOB_DAT];
237 case BFD_RELOC_386_JUMP_SLOT:
238 TRACE ("BFD_RELOC_386_JUMP_SLOT");
239 return &elf_howto_table[R_386_JUMP_SLOT];
241 case BFD_RELOC_386_RELATIVE:
242 TRACE ("BFD_RELOC_386_RELATIVE");
243 return &elf_howto_table[R_386_RELATIVE];
245 case BFD_RELOC_386_GOTOFF:
246 TRACE ("BFD_RELOC_386_GOTOFF");
247 return &elf_howto_table[R_386_GOTOFF];
249 case BFD_RELOC_386_GOTPC:
250 TRACE ("BFD_RELOC_386_GOTPC");
251 return &elf_howto_table[R_386_GOTPC];
253 /* These relocs are a GNU extension. */
254 case BFD_RELOC_386_TLS_TPOFF:
255 TRACE ("BFD_RELOC_386_TLS_TPOFF");
256 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
258 case BFD_RELOC_386_TLS_IE:
259 TRACE ("BFD_RELOC_386_TLS_IE");
260 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
262 case BFD_RELOC_386_TLS_GOTIE:
263 TRACE ("BFD_RELOC_386_TLS_GOTIE");
264 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
266 case BFD_RELOC_386_TLS_LE:
267 TRACE ("BFD_RELOC_386_TLS_LE");
268 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
270 case BFD_RELOC_386_TLS_GD:
271 TRACE ("BFD_RELOC_386_TLS_GD");
272 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
274 case BFD_RELOC_386_TLS_LDM:
275 TRACE ("BFD_RELOC_386_TLS_LDM");
276 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
279 TRACE ("BFD_RELOC_16");
280 return &elf_howto_table[R_386_16 - R_386_ext_offset];
282 case BFD_RELOC_16_PCREL:
283 TRACE ("BFD_RELOC_16_PCREL");
284 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
287 TRACE ("BFD_RELOC_8");
288 return &elf_howto_table[R_386_8 - R_386_ext_offset];
290 case BFD_RELOC_8_PCREL:
291 TRACE ("BFD_RELOC_8_PCREL");
292 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
294 /* Common with Sun TLS implementation. */
295 case BFD_RELOC_386_TLS_LDO_32:
296 TRACE ("BFD_RELOC_386_TLS_LDO_32");
297 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
299 case BFD_RELOC_386_TLS_IE_32:
300 TRACE ("BFD_RELOC_386_TLS_IE_32");
301 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
303 case BFD_RELOC_386_TLS_LE_32:
304 TRACE ("BFD_RELOC_386_TLS_LE_32");
305 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
307 case BFD_RELOC_386_TLS_DTPMOD32:
308 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
309 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
311 case BFD_RELOC_386_TLS_DTPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
313 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
315 case BFD_RELOC_386_TLS_TPOFF32:
316 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
317 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
319 case BFD_RELOC_SIZE32:
320 TRACE ("BFD_RELOC_SIZE32");
321 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
323 case BFD_RELOC_386_TLS_GOTDESC:
324 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
325 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
327 case BFD_RELOC_386_TLS_DESC_CALL:
328 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
329 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
331 case BFD_RELOC_386_TLS_DESC:
332 TRACE ("BFD_RELOC_386_TLS_DESC");
333 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
335 case BFD_RELOC_386_IRELATIVE:
336 TRACE ("BFD_RELOC_386_IRELATIVE");
337 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
339 case BFD_RELOC_386_GOT32X:
340 TRACE ("BFD_RELOC_386_GOT32X");
341 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
343 case BFD_RELOC_VTABLE_INHERIT:
344 TRACE ("BFD_RELOC_VTABLE_INHERIT");
345 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
347 case BFD_RELOC_VTABLE_ENTRY:
348 TRACE ("BFD_RELOC_VTABLE_ENTRY");
349 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
359 static reloc_howto_type *
360 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
365 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
366 if (elf_howto_table[i].name != NULL
367 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
368 return &elf_howto_table[i];
373 static reloc_howto_type *
374 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
378 if ((indx = r_type) >= R_386_standard
379 && ((indx = r_type - R_386_ext_offset) - R_386_standard
380 >= R_386_ext - R_386_standard)
381 && ((indx = r_type - R_386_tls_offset) - R_386_ext
382 >= R_386_ext2 - R_386_ext)
383 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
384 >= R_386_vt - R_386_ext2))
386 /* xgettext:c-format */
387 _bfd_error_handler (_("%B: invalid relocation type %d"),
391 /* PR 17512: file: 0f67f69d. */
392 if (elf_howto_table [indx].type != r_type)
394 return &elf_howto_table[indx];
398 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
400 Elf_Internal_Rela *dst)
402 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
403 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
406 /* Return whether a symbol name implies a local label. The UnixWare
407 2.1 cc generates temporary symbols that start with .X, so we
408 recognize them here. FIXME: do other SVR4 compilers also use .X?.
409 If so, we should move the .X recognition into
410 _bfd_elf_is_local_label_name. */
413 elf_i386_is_local_label_name (bfd *abfd, const char *name)
415 if (name[0] == '.' && name[1] == 'X')
418 return _bfd_elf_is_local_label_name (abfd, name);
421 /* Support for core dump NOTE sections. */
424 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
429 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
431 int pr_version = bfd_get_32 (abfd, note->descdata);
437 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
440 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
444 size = bfd_get_32 (abfd, note->descdata + 8);
448 switch (note->descsz)
453 case 144: /* Linux/i386 */
455 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
458 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
468 /* Make a ".reg/999" section. */
469 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
470 size, note->descpos + offset);
474 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
476 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
478 int pr_version = bfd_get_32 (abfd, note->descdata);
483 elf_tdata (abfd)->core->program
484 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
485 elf_tdata (abfd)->core->command
486 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
490 switch (note->descsz)
495 case 124: /* Linux/i386 elf_prpsinfo. */
496 elf_tdata (abfd)->core->pid
497 = bfd_get_32 (abfd, note->descdata + 12);
498 elf_tdata (abfd)->core->program
499 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
500 elf_tdata (abfd)->core->command
501 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
505 /* Note that for some reason, a spurious space is tacked
506 onto the end of the args in some (at least one anyway)
507 implementations, so strip it off if it exists. */
509 char *command = elf_tdata (abfd)->core->command;
510 int n = strlen (command);
512 if (0 < n && command[n - 1] == ' ')
513 command[n - 1] = '\0';
519 /* Functions for the i386 ELF linker.
521 In order to gain some understanding of code in this file without
522 knowing all the intricate details of the linker, note the
525 Functions named elf_i386_* are called by external routines, other
526 functions are only called locally. elf_i386_* functions appear
527 in this file more or less in the order in which they are called
528 from external routines. eg. elf_i386_check_relocs is called
529 early in the link process, elf_i386_finish_dynamic_sections is
530 one of the last functions. */
533 /* The name of the dynamic interpreter. This is put in the .interp
536 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
538 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
539 copying dynamic variables from a shared lib into an app's dynbss
540 section, and instead use a dynamic relocation to point into the
542 #define ELIMINATE_COPY_RELOCS 1
544 /* The size in bytes of an entry in the lazy procedure linkage table. */
546 #define LAZY_PLT_ENTRY_SIZE 16
548 /* The size in bytes of an entry in the non-lazy procedure linkage
551 #define NON_LAZY_PLT_ENTRY_SIZE 8
553 /* The first entry in an absolute lazy procedure linkage table looks
554 like this. See the SVR4 ABI i386 supplement to see how this works.
555 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
557 static const bfd_byte elf_i386_lazy_plt0_entry[12] =
559 0xff, 0x35, /* pushl contents of address */
560 0, 0, 0, 0, /* replaced with address of .got + 4. */
561 0xff, 0x25, /* jmp indirect */
562 0, 0, 0, 0 /* replaced with address of .got + 8. */
565 /* Subsequent entries in an absolute lazy procedure linkage table look
568 static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
570 0xff, 0x25, /* jmp indirect */
571 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
572 0x68, /* pushl immediate */
573 0, 0, 0, 0, /* replaced with offset into relocation table. */
574 0xe9, /* jmp relative */
575 0, 0, 0, 0 /* replaced with offset to start of .plt. */
578 /* The first entry in a PIC lazy procedure linkage table look like
579 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
580 lazy_plt->plt0_pad_byte. */
582 static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
584 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
585 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
588 /* Subsequent entries in a PIC lazy procedure linkage table look like
591 static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
593 0xff, 0xa3, /* jmp *offset(%ebx) */
594 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
595 0x68, /* pushl immediate */
596 0, 0, 0, 0, /* replaced with offset into relocation table. */
597 0xe9, /* jmp relative */
598 0, 0, 0, 0 /* replaced with offset to start of .plt. */
601 /* Entries in the non-lazy procedure linkage table look like this. */
603 static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
605 0xff, 0x25, /* jmp indirect */
606 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
607 0x66, 0x90 /* xchg %ax,%ax */
610 /* Entries in the PIC non-lazy procedure linkage table look like
613 static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
615 0xff, 0xa3, /* jmp *offset(%ebx) */
616 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
617 0x66, 0x90 /* xchg %ax,%ax */
620 /* The first entry in an absolute IBT-enabled lazy procedure linkage
621 table looks like this. */
623 static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
625 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
626 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
627 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
630 /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
631 table look like this. Subsequent entries for a PIC IBT-enabled lazy
632 procedure linkage table are the same. */
634 static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
636 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
637 0x68, 0, 0, 0, 0, /* pushl immediate */
638 0xe9, 0, 0, 0, 0, /* jmp relative */
639 0x66, 0x90 /* xchg %ax,%ax */
642 /* The first entry in a PIC IBT-enabled lazy procedure linkage table
645 static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
647 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
648 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
649 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
652 /* Entries for branches with IBT-enabled in the absolute non-lazey
653 procedure linkage table look like this. They have the same size
654 as the lazy PLT entry. */
656 static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
658 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
659 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
660 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
663 /* Entries for branches with IBT-enabled in the PIC non-lazey procedure
664 linkage table look like this. They have the same size as the lazy
667 static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
669 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
670 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
671 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
674 /* .eh_frame covering the lazy .plt section. */
676 static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
678 #define PLT_CIE_LENGTH 20
679 #define PLT_FDE_LENGTH 36
680 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
681 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
682 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
683 0, 0, 0, 0, /* CIE ID */
685 'z', 'R', 0, /* Augmentation string */
686 1, /* Code alignment factor */
687 0x7c, /* Data alignment factor */
688 8, /* Return address column */
689 1, /* Augmentation size */
690 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
691 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
692 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
693 DW_CFA_nop, DW_CFA_nop,
695 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
696 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
697 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
698 0, 0, 0, 0, /* .plt size goes here */
699 0, /* Augmentation size */
700 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
701 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
702 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
703 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
704 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
705 11, /* Block length */
706 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
707 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
708 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
709 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
710 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
713 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
715 static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
717 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
718 0, 0, 0, 0, /* CIE ID */
720 'z', 'R', 0, /* Augmentation string */
721 1, /* Code alignment factor */
722 0x7c, /* Data alignment factor */
723 8, /* Return address column */
724 1, /* Augmentation size */
725 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
726 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
727 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
728 DW_CFA_nop, DW_CFA_nop,
730 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
731 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
732 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
733 0, 0, 0, 0, /* .plt size goes here */
734 0, /* Augmentation size */
735 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
736 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
737 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
738 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
739 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
740 11, /* Block length */
741 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
742 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
743 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
744 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
745 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
748 /* .eh_frame covering the non-lazy .plt section. */
750 static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
752 #define PLT_GOT_FDE_LENGTH 16
753 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
754 0, 0, 0, 0, /* CIE ID */
756 'z', 'R', 0, /* Augmentation string */
757 1, /* Code alignment factor */
758 0x7c, /* Data alignment factor */
759 8, /* Return address column */
760 1, /* Augmentation size */
761 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
762 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
763 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
764 DW_CFA_nop, DW_CFA_nop,
766 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
767 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
768 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
769 0, 0, 0, 0, /* non-lazy .plt size goes here */
770 0, /* Augmentation size */
771 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
774 struct elf_i386_lazy_plt_layout
776 /* The first entry in an absolute lazy procedure linkage table looks
778 const bfd_byte *plt0_entry;
779 unsigned int plt0_entry_size;
781 /* Offsets into plt0_entry that are to be replaced with GOT[1] and
783 unsigned int plt0_got1_offset;
784 unsigned int plt0_got2_offset;
786 /* Later entries in an absolute lazy procedure linkage table look
788 const bfd_byte *plt_entry;
789 unsigned int plt_entry_size;
791 /* Offsets into plt_entry that are to be replaced with... */
792 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
793 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
794 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
796 /* Offset into plt_entry where the initial value of the GOT entry
798 unsigned int plt_lazy_offset;
800 /* The first entry in a PIC lazy procedure linkage table looks like
802 const bfd_byte *pic_plt0_entry;
804 /* Subsequent entries in a PIC lazy procedure linkage table look
806 const bfd_byte *pic_plt_entry;
808 /* .eh_frame covering the lazy .plt section. */
809 const bfd_byte *eh_frame_plt;
810 unsigned int eh_frame_plt_size;
813 struct elf_i386_non_lazy_plt_layout
815 /* Entries in an absolute non-lazy procedure linkage table look like
817 const bfd_byte *plt_entry;
818 /* Entries in a PIC non-lazy procedure linkage table look like this. */
819 const bfd_byte *pic_plt_entry;
821 unsigned int plt_entry_size;
823 /* Offsets into plt_entry that are to be replaced with... */
824 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
826 /* .eh_frame covering the non-lazy .plt section. */
827 const bfd_byte *eh_frame_plt;
828 unsigned int eh_frame_plt_size;
831 struct elf_i386_plt_layout
833 /* The first entry in a lazy procedure linkage table looks like this. */
834 const bfd_byte *plt0_entry;
835 /* Entries in a procedure linkage table look like this. */
836 const bfd_byte *plt_entry;
837 unsigned int plt_entry_size;
840 unsigned int has_plt0;
842 /* Offsets into plt_entry that are to be replaced with... */
843 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
845 /* .eh_frame covering the .plt section. */
846 const bfd_byte *eh_frame_plt;
847 unsigned int eh_frame_plt_size;
850 /* These are the standard parameters. */
851 static const struct elf_i386_lazy_plt_layout elf_i386_lazy_plt =
853 elf_i386_lazy_plt0_entry, /* plt0_entry */
854 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
855 2, /* plt0_got1_offset */
856 8, /* plt0_got2_offset */
857 elf_i386_lazy_plt_entry, /* plt_entry */
858 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
859 2, /* plt_got_offset */
860 7, /* plt_reloc_offset */
861 12, /* plt_plt_offset */
862 6, /* plt_lazy_offset */
863 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
864 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
865 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
866 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
869 static const struct elf_i386_non_lazy_plt_layout elf_i386_non_lazy_plt =
871 elf_i386_non_lazy_plt_entry, /* plt_entry */
872 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
873 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
874 2, /* plt_got_offset */
875 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
876 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
879 static const struct elf_i386_lazy_plt_layout elf_i386_lazy_ibt_plt =
881 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
882 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
883 2, /* plt0_got1_offset */
884 8, /* plt0_got2_offset */
885 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
886 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
887 4+2, /* plt_got_offset */
888 4+1, /* plt_reloc_offset */
889 4+6, /* plt_plt_offset */
890 0, /* plt_lazy_offset */
891 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
892 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
893 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
894 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
897 static const struct elf_i386_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
899 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
900 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
901 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
902 4+2, /* plt_got_offset */
903 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
904 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
908 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
909 for the PLTResolve stub and then for each PLT entry. */
910 #define PLTRESOLVE_RELOCS_SHLIB 0
911 #define PLTRESOLVE_RELOCS 2
912 #define PLT_NON_JUMP_SLOT_RELOCS 2
914 /* Architecture-specific backend data for i386. */
916 struct elf_i386_backend_data
918 /* Value used to fill the unused bytes of the first PLT entry. */
919 bfd_byte plt0_pad_byte;
930 #define get_elf_i386_backend_data(abfd) \
931 ((const struct elf_i386_backend_data *) \
932 get_elf_backend_data (abfd)->arch_data)
934 /* These are the standard parameters. */
935 static const struct elf_i386_backend_data elf_i386_arch_bed =
937 0, /* plt0_pad_byte */
941 #define elf_backend_arch_data &elf_i386_arch_bed
943 /* Is a undefined weak symbol which is resolved to 0. Reference to an
944 undefined weak symbol is resolved to 0 when building executable if
946 1. Has non-GOT/non-PLT relocations in text section. Or
947 2. Has no GOT/PLT relocation.
948 Local undefined weak symbol is always resolved to 0.
950 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
951 ((EH)->elf.root.type == bfd_link_hash_undefweak \
952 && ((EH)->elf.forced_local \
953 || (bfd_link_executable (INFO) \
954 && (elf_i386_hash_table (INFO)->interp == NULL \
956 || (EH)->has_non_got_reloc \
957 || !(INFO)->dynamic_undefined_weak))))
959 /* i386 ELF linker hash entry. */
961 struct elf_i386_link_hash_entry
963 struct elf_link_hash_entry elf;
965 /* Track dynamic relocs copied for this symbol. */
966 struct elf_dyn_relocs *dyn_relocs;
968 #define GOT_UNKNOWN 0
972 #define GOT_TLS_IE_POS 5
973 #define GOT_TLS_IE_NEG 6
974 #define GOT_TLS_IE_BOTH 7
975 #define GOT_TLS_GDESC 8
976 #define GOT_TLS_GD_BOTH_P(type) \
977 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
978 #define GOT_TLS_GD_P(type) \
979 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
980 #define GOT_TLS_GDESC_P(type) \
981 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
982 #define GOT_TLS_GD_ANY_P(type) \
983 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
984 unsigned char tls_type;
986 /* Symbol is referenced by R_386_GOTOFF relocation. */
987 unsigned int gotoff_ref : 1;
989 /* Symbol has GOT or PLT relocations. */
990 unsigned int has_got_reloc : 1;
992 /* Symbol has non-GOT/non-PLT relocations in text sections. */
993 unsigned int has_non_got_reloc : 1;
995 /* Don't call finish_dynamic_symbol on this symbol. */
996 unsigned int no_finish_dynamic_symbol : 1;
998 /* TRUE if symbol symbol is __tls_get_addr. */
999 unsigned int tls_get_addr : 1;
1001 /* Reference count of C/C++ function pointer relocations in read-write
1002 section which can be resolved at run-time. */
1003 bfd_signed_vma func_pointer_refcount;
1005 /* Information about the GOT PLT entry. Filled when there are both
1006 GOT and PLT relocations against the same function. */
1007 union gotplt_union plt_got;
1009 /* Information about the second PLT entry. */
1010 union gotplt_union plt_second;
1012 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
1013 starting at the end of the jump table. */
1014 bfd_vma tlsdesc_got;
1017 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
1019 struct elf_i386_obj_tdata
1021 struct elf_obj_tdata root;
1023 /* tls_type for each local got entry. */
1024 char *local_got_tls_type;
1026 /* GOTPLT entries for TLS descriptors. */
1027 bfd_vma *local_tlsdesc_gotent;
1030 #define elf_i386_tdata(abfd) \
1031 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
1033 #define elf_i386_local_got_tls_type(abfd) \
1034 (elf_i386_tdata (abfd)->local_got_tls_type)
1036 #define elf_i386_local_tlsdesc_gotent(abfd) \
1037 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
1039 #define is_i386_elf(bfd) \
1040 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1041 && elf_tdata (bfd) != NULL \
1042 && elf_object_id (bfd) == I386_ELF_DATA)
1045 elf_i386_mkobject (bfd *abfd)
1047 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
1051 /* i386 ELF linker hash table. */
1053 struct elf_i386_link_hash_table
1055 struct elf_link_hash_table elf;
1057 /* Short-cuts to get to dynamic linker sections. */
1059 asection *plt_eh_frame;
1060 asection *plt_second;
1061 asection *plt_second_eh_frame;
1063 asection *plt_got_eh_frame;
1065 /* Parameters describing PLT generation. */
1066 struct elf_i386_plt_layout plt;
1068 /* Parameters describing lazy PLT generation. */
1069 const struct elf_i386_lazy_plt_layout *lazy_plt;
1071 /* Parameters describing non-lazy PLT generation. */
1072 const struct elf_i386_non_lazy_plt_layout *non_lazy_plt;
1076 bfd_signed_vma refcount;
1080 /* The amount of space used by the reserved portion of the sgotplt
1081 section, plus whatever space is used by the jump slots. */
1082 bfd_vma sgotplt_jump_table_size;
1084 /* Small local sym cache. */
1085 struct sym_cache sym_cache;
1087 /* _TLS_MODULE_BASE_ symbol. */
1088 struct bfd_link_hash_entry *tls_module_base;
1090 /* Used by local STT_GNU_IFUNC symbols. */
1091 htab_t loc_hash_table;
1092 void * loc_hash_memory;
1094 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
1097 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
1098 bfd_vma next_tls_desc_index;
1100 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
1101 bfd_vma next_jump_slot_index;
1103 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
1104 bfd_vma next_irelative_index;
1106 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
1107 to read-only sections. */
1108 bfd_boolean readonly_dynrelocs_against_ifunc;
1111 /* Get the i386 ELF linker hash table from a link_info structure. */
1113 #define elf_i386_hash_table(p) \
1114 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
1115 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
1117 #define elf_i386_compute_jump_table_size(htab) \
1118 ((htab)->elf.srelplt->reloc_count * 4)
1120 /* Create an entry in an i386 ELF linker hash table. */
1122 static struct bfd_hash_entry *
1123 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
1124 struct bfd_hash_table *table,
1127 /* Allocate the structure if it has not already been allocated by a
1131 entry = (struct bfd_hash_entry *)
1132 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
1137 /* Call the allocation method of the superclass. */
1138 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1141 struct elf_i386_link_hash_entry *eh;
1143 eh = (struct elf_i386_link_hash_entry *) entry;
1144 eh->dyn_relocs = NULL;
1145 eh->tls_type = GOT_UNKNOWN;
1147 eh->has_got_reloc = 0;
1148 eh->has_non_got_reloc = 0;
1149 eh->no_finish_dynamic_symbol = 0;
1150 eh->tls_get_addr = 0;
1151 eh->func_pointer_refcount = 0;
1152 eh->plt_got.offset = (bfd_vma) -1;
1153 eh->tlsdesc_got = (bfd_vma) -1;
1159 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1160 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1161 as global symbol. We reuse indx and dynstr_index for local symbol
1162 hash since they aren't used by global symbols in this backend. */
1165 elf_i386_local_htab_hash (const void *ptr)
1167 struct elf_link_hash_entry *h
1168 = (struct elf_link_hash_entry *) ptr;
1169 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
1172 /* Compare local hash entries. */
1175 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
1177 struct elf_link_hash_entry *h1
1178 = (struct elf_link_hash_entry *) ptr1;
1179 struct elf_link_hash_entry *h2
1180 = (struct elf_link_hash_entry *) ptr2;
1182 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
1185 /* Find and/or create a hash entry for local symbol. */
1187 static struct elf_link_hash_entry *
1188 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
1189 bfd *abfd, const Elf_Internal_Rela *rel,
1192 struct elf_i386_link_hash_entry e, *ret;
1193 asection *sec = abfd->sections;
1194 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
1195 ELF32_R_SYM (rel->r_info));
1198 e.elf.indx = sec->id;
1199 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
1200 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
1201 create ? INSERT : NO_INSERT);
1208 ret = (struct elf_i386_link_hash_entry *) *slot;
1212 ret = (struct elf_i386_link_hash_entry *)
1213 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
1214 sizeof (struct elf_i386_link_hash_entry));
1217 memset (ret, 0, sizeof (*ret));
1218 ret->elf.indx = sec->id;
1219 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
1220 ret->elf.dynindx = -1;
1221 ret->func_pointer_refcount = 0;
1222 ret->plt_got.offset = (bfd_vma) -1;
1228 /* Destroy an i386 ELF linker hash table. */
1231 elf_i386_link_hash_table_free (bfd *obfd)
1233 struct elf_i386_link_hash_table *htab
1234 = (struct elf_i386_link_hash_table *) obfd->link.hash;
1236 if (htab->loc_hash_table)
1237 htab_delete (htab->loc_hash_table);
1238 if (htab->loc_hash_memory)
1239 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1240 _bfd_elf_link_hash_table_free (obfd);
1243 /* Create an i386 ELF linker hash table. */
1245 static struct bfd_link_hash_table *
1246 elf_i386_link_hash_table_create (bfd *abfd)
1248 struct elf_i386_link_hash_table *ret;
1249 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
1251 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
1255 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1256 elf_i386_link_hash_newfunc,
1257 sizeof (struct elf_i386_link_hash_entry),
1264 ret->loc_hash_table = htab_try_create (1024,
1265 elf_i386_local_htab_hash,
1266 elf_i386_local_htab_eq,
1268 ret->loc_hash_memory = objalloc_create ();
1269 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1271 elf_i386_link_hash_table_free (abfd);
1274 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1276 return &ret->elf.root;
1279 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1282 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1283 struct elf_link_hash_entry *dir,
1284 struct elf_link_hash_entry *ind)
1286 struct elf_i386_link_hash_entry *edir, *eind;
1288 edir = (struct elf_i386_link_hash_entry *) dir;
1289 eind = (struct elf_i386_link_hash_entry *) ind;
1291 if (eind->dyn_relocs != NULL)
1293 if (edir->dyn_relocs != NULL)
1295 struct elf_dyn_relocs **pp;
1296 struct elf_dyn_relocs *p;
1298 /* Add reloc counts against the indirect sym to the direct sym
1299 list. Merge any entries against the same section. */
1300 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1302 struct elf_dyn_relocs *q;
1304 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1305 if (q->sec == p->sec)
1307 q->pc_count += p->pc_count;
1308 q->count += p->count;
1315 *pp = edir->dyn_relocs;
1318 edir->dyn_relocs = eind->dyn_relocs;
1319 eind->dyn_relocs = NULL;
1322 if (ind->root.type == bfd_link_hash_indirect
1323 && dir->got.refcount <= 0)
1325 edir->tls_type = eind->tls_type;
1326 eind->tls_type = GOT_UNKNOWN;
1329 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1330 generate a R_386_COPY reloc. */
1331 edir->gotoff_ref |= eind->gotoff_ref;
1333 edir->has_got_reloc |= eind->has_got_reloc;
1334 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1336 if (ELIMINATE_COPY_RELOCS
1337 && ind->root.type != bfd_link_hash_indirect
1338 && dir->dynamic_adjusted)
1340 /* If called to transfer flags for a weakdef during processing
1341 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1342 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1343 if (dir->versioned != versioned_hidden)
1344 dir->ref_dynamic |= ind->ref_dynamic;
1345 dir->ref_regular |= ind->ref_regular;
1346 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1347 dir->needs_plt |= ind->needs_plt;
1348 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1352 if (eind->func_pointer_refcount > 0)
1354 edir->func_pointer_refcount += eind->func_pointer_refcount;
1355 eind->func_pointer_refcount = 0;
1358 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1362 /* Return TRUE if the TLS access code sequence support transition
1366 elf_i386_check_tls_transition (asection *sec,
1368 Elf_Internal_Shdr *symtab_hdr,
1369 struct elf_link_hash_entry **sym_hashes,
1370 unsigned int r_type,
1371 const Elf_Internal_Rela *rel,
1372 const Elf_Internal_Rela *relend)
1374 unsigned int val, type, reg;
1375 unsigned long r_symndx;
1376 struct elf_link_hash_entry *h;
1379 bfd_boolean indirect_call;
1381 offset = rel->r_offset;
1386 if (offset < 2 || (rel + 1) >= relend)
1389 indirect_call = FALSE;
1390 call = contents + offset + 4;
1393 if (r_type == R_386_TLS_GD)
1395 /* Check transition from GD access model. Only
1396 leal foo@tlsgd(,%ebx,1), %eax
1397 call ___tls_get_addr@PLT
1399 leal foo@tlsgd(%ebx) %eax
1400 call ___tls_get_addr@PLT
1403 leal foo@tlsgd(%reg), %eax
1404 call *___tls_get_addr@GOT(%reg)
1405 which may be converted to
1406 addr32 call ___tls_get_addr
1407 can transit to different access model. */
1408 if ((offset + 10) > sec->size
1409 || (type != 0x8d && type != 0x04))
1414 /* leal foo@tlsgd(,%ebx,1), %eax
1415 call ___tls_get_addr@PLT */
1419 if (*(call - 7) != 0x8d
1427 leal foo@tlsgd(%ebx), %eax
1428 call ___tls_get_addr@PLT
1431 leal foo@tlsgd(%reg), %eax
1432 call *___tls_get_addr@GOT(%reg)
1433 which may be converted to
1434 addr32 call ___tls_get_addr
1436 %eax can't be used as the GOT base register since it
1437 is used to pass parameter to ___tls_get_addr. */
1439 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
1442 indirect_call = call[0] == 0xff;
1443 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
1444 && !(call[0] == 0x67 && call[1] == 0xe8)
1446 && (call[1] & 0xf8) == 0x90
1447 && (call[1] & 0x7) == reg))
1453 /* Check transition from LD access model. Only
1454 leal foo@tlsldm(%ebx), %eax
1455 call ___tls_get_addr@PLT
1457 leal foo@tlsldm(%reg), %eax
1458 call *___tls_get_addr@GOT(%reg)
1459 which may be converted to
1460 addr32 call ___tls_get_addr
1461 can transit to different access model. */
1462 if (type != 0x8d || (offset + 9) > sec->size)
1465 /* %eax can't be used as the GOT base register since it is
1466 used to pass parameter to ___tls_get_addr. */
1468 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
1471 indirect_call = call[0] == 0xff;
1472 if (!(reg == 3 && call[0] == 0xe8)
1473 && !(call[0] == 0x67 && call[1] == 0xe8)
1475 && (call[1] & 0xf8) == 0x90
1476 && (call[1] & 0x7) == reg))
1480 r_symndx = ELF32_R_SYM (rel[1].r_info);
1481 if (r_symndx < symtab_hdr->sh_info)
1484 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1486 || !((struct elf_i386_link_hash_entry *) h)->tls_get_addr)
1488 else if (indirect_call)
1489 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
1491 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1492 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
1495 /* Check transition from IE access model:
1496 movl foo@indntpoff(%rip), %eax
1497 movl foo@indntpoff(%rip), %reg
1498 addl foo@indntpoff(%rip), %reg
1501 if (offset < 1 || (offset + 4) > sec->size)
1504 /* Check "movl foo@tpoff(%rip), %eax" first. */
1505 val = bfd_get_8 (abfd, contents + offset - 1);
1512 /* Check movl|addl foo@tpoff(%rip), %reg. */
1513 type = bfd_get_8 (abfd, contents + offset - 2);
1514 return ((type == 0x8b || type == 0x03)
1515 && (val & 0xc7) == 0x05);
1517 case R_386_TLS_GOTIE:
1518 case R_386_TLS_IE_32:
1519 /* Check transition from {IE_32,GOTIE} access model:
1520 subl foo@{tpoff,gontoff}(%reg1), %reg2
1521 movl foo@{tpoff,gontoff}(%reg1), %reg2
1522 addl foo@{tpoff,gontoff}(%reg1), %reg2
1525 if (offset < 2 || (offset + 4) > sec->size)
1528 val = bfd_get_8 (abfd, contents + offset - 1);
1529 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1532 type = bfd_get_8 (abfd, contents + offset - 2);
1533 return type == 0x8b || type == 0x2b || type == 0x03;
1535 case R_386_TLS_GOTDESC:
1536 /* Check transition from GDesc access model:
1537 leal x@tlsdesc(%ebx), %eax
1539 Make sure it's a leal adding ebx to a 32-bit offset
1540 into any register, although it's probably almost always
1543 if (offset < 2 || (offset + 4) > sec->size)
1546 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1549 val = bfd_get_8 (abfd, contents + offset - 1);
1550 return (val & 0xc7) == 0x83;
1552 case R_386_TLS_DESC_CALL:
1553 /* Check transition from GDesc access model:
1554 call *x@tlsdesc(%eax)
1556 if (offset + 2 <= sec->size)
1558 /* Make sure that it's a call *x@tlsdesc(%eax). */
1559 call = contents + offset;
1560 return call[0] == 0xff && call[1] == 0x10;
1570 /* Return TRUE if the TLS access transition is OK or no transition
1571 will be performed. Update R_TYPE if there is a transition. */
1574 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1575 asection *sec, bfd_byte *contents,
1576 Elf_Internal_Shdr *symtab_hdr,
1577 struct elf_link_hash_entry **sym_hashes,
1578 unsigned int *r_type, int tls_type,
1579 const Elf_Internal_Rela *rel,
1580 const Elf_Internal_Rela *relend,
1581 struct elf_link_hash_entry *h,
1582 unsigned long r_symndx,
1583 bfd_boolean from_relocate_section)
1585 unsigned int from_type = *r_type;
1586 unsigned int to_type = from_type;
1587 bfd_boolean check = TRUE;
1589 /* Skip TLS transition for functions. */
1591 && (h->type == STT_FUNC
1592 || h->type == STT_GNU_IFUNC))
1598 case R_386_TLS_GOTDESC:
1599 case R_386_TLS_DESC_CALL:
1600 case R_386_TLS_IE_32:
1602 case R_386_TLS_GOTIE:
1603 if (bfd_link_executable (info))
1606 to_type = R_386_TLS_LE_32;
1607 else if (from_type != R_386_TLS_IE
1608 && from_type != R_386_TLS_GOTIE)
1609 to_type = R_386_TLS_IE_32;
1612 /* When we are called from elf_i386_relocate_section, there may
1613 be additional transitions based on TLS_TYPE. */
1614 if (from_relocate_section)
1616 unsigned int new_to_type = to_type;
1618 if (bfd_link_executable (info)
1621 && (tls_type & GOT_TLS_IE))
1622 new_to_type = R_386_TLS_LE_32;
1624 if (to_type == R_386_TLS_GD
1625 || to_type == R_386_TLS_GOTDESC
1626 || to_type == R_386_TLS_DESC_CALL)
1628 if (tls_type == GOT_TLS_IE_POS)
1629 new_to_type = R_386_TLS_GOTIE;
1630 else if (tls_type & GOT_TLS_IE)
1631 new_to_type = R_386_TLS_IE_32;
1634 /* We checked the transition before when we were called from
1635 elf_i386_check_relocs. We only want to check the new
1636 transition which hasn't been checked before. */
1637 check = new_to_type != to_type && from_type == to_type;
1638 to_type = new_to_type;
1644 if (bfd_link_executable (info))
1645 to_type = R_386_TLS_LE_32;
1652 /* Return TRUE if there is no transition. */
1653 if (from_type == to_type)
1656 /* Check if the transition can be performed. */
1658 && ! elf_i386_check_tls_transition (sec, contents,
1659 symtab_hdr, sym_hashes,
1660 from_type, rel, relend))
1662 reloc_howto_type *from, *to;
1665 from = elf_i386_rtype_to_howto (abfd, from_type);
1666 to = elf_i386_rtype_to_howto (abfd, to_type);
1669 name = h->root.root.string;
1672 struct elf_i386_link_hash_table *htab;
1674 htab = elf_i386_hash_table (info);
1679 Elf_Internal_Sym *isym;
1681 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1683 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1688 /* xgettext:c-format */
1689 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1690 "in section `%A' failed"),
1691 abfd, from->name, to->name, name,
1692 rel->r_offset, sec);
1693 bfd_set_error (bfd_error_bad_value);
1701 /* With the local symbol, foo, we convert
1702 mov foo@GOT[(%reg1)], %reg2
1704 lea foo[@GOTOFF(%reg1)], %reg2
1706 call/jmp *foo@GOT[(%reg)]
1708 nop call foo/jmp foo nop
1709 When PIC is false, convert
1710 test %reg1, foo@GOT[(%reg2)]
1714 binop foo@GOT[(%reg1)], %reg2
1717 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1722 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1724 Elf_Internal_Rela *irel,
1725 struct elf_link_hash_entry *h,
1726 bfd_boolean *converted,
1727 struct bfd_link_info *link_info)
1729 struct elf_i386_link_hash_table *htab;
1730 unsigned int opcode;
1732 bfd_boolean baseless;
1733 Elf_Internal_Sym *isym;
1734 unsigned int addend;
1738 bfd_boolean to_reloc_32;
1739 unsigned int r_type;
1740 unsigned int r_symndx;
1741 bfd_vma roff = irel->r_offset;
1746 /* Addend for R_386_GOT32X relocations must be 0. */
1747 addend = bfd_get_32 (abfd, contents + roff);
1751 htab = elf_i386_hash_table (link_info);
1752 is_pic = bfd_link_pic (link_info);
1754 r_type = ELF32_R_TYPE (irel->r_info);
1755 r_symndx = ELF32_R_SYM (irel->r_info);
1757 modrm = bfd_get_8 (abfd, contents + roff - 1);
1758 baseless = (modrm & 0xc7) == 0x5;
1760 if (baseless && is_pic)
1762 /* For PIC, disallow R_386_GOT32X without a base register
1763 since we don't know what the GOT base is. */
1768 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1770 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1773 name = h->root.root.string;
1776 /* xgettext:c-format */
1777 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1778 " register can not be used when making a shared object"),
1783 opcode = bfd_get_8 (abfd, contents + roff - 2);
1785 /* Convert to R_386_32 if PIC is false or there is no base
1787 to_reloc_32 = !is_pic || baseless;
1789 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1793 if (opcode == 0x0ff)
1794 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1795 goto convert_branch;
1797 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1798 "test %reg1, foo@GOT(%reg2)" and
1799 "binop foo@GOT[(%reg1)], %reg2". */
1803 /* Undefined weak symbol is only bound locally in executable
1804 and its reference is resolved as 0. */
1805 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE,
1806 elf_i386_hash_entry (h)))
1810 /* No direct branch to 0 for PIC. */
1814 goto convert_branch;
1818 /* We can convert load of address 0 to R_386_32. */
1826 /* We have "call/jmp *foo@GOT[(%reg)]". */
1827 if ((h->root.type == bfd_link_hash_defined
1828 || h->root.type == bfd_link_hash_defweak)
1829 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1831 /* The function is locally defined. */
1833 /* Convert R_386_GOT32X to R_386_PC32. */
1834 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1836 struct elf_i386_link_hash_entry *eh
1837 = (struct elf_i386_link_hash_entry *) h;
1839 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1842 /* To support TLS optimization, always use addr32 prefix
1843 for "call *___tls_get_addr@GOT(%reg)". */
1844 if (eh && eh->tls_get_addr)
1847 nop_offset = irel->r_offset - 2;
1851 nop = link_info->call_nop_byte;
1852 if (link_info->call_nop_as_suffix)
1854 nop_offset = roff + 3;
1855 irel->r_offset -= 1;
1858 nop_offset = roff - 2;
1863 /* Convert to "jmp foo nop". */
1866 nop_offset = roff + 3;
1867 irel->r_offset -= 1;
1870 bfd_put_8 (abfd, nop, contents + nop_offset);
1871 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1872 /* When converting to PC-relative relocation, we
1873 need to adjust addend by -4. */
1874 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1875 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1882 /* We have "mov foo@GOT[(%re1g)], %reg2",
1883 "test %reg1, foo@GOT(%reg2)" and
1884 "binop foo@GOT[(%reg1)], %reg2".
1886 Avoid optimizing _DYNAMIC since ld.so may use its
1887 link-time address. */
1888 if (h == htab->elf.hdynamic)
1891 /* def_regular is set by an assignment in a linker script in
1892 bfd_elf_record_link_assignment. start_stop is set on
1893 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1896 || h->root.type == bfd_link_hash_defined
1897 || h->root.type == bfd_link_hash_defweak)
1898 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
1905 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1906 "mov $foo, %reg2" with R_386_32. */
1908 modrm = 0xc0 | (modrm & 0x38) >> 3;
1909 bfd_put_8 (abfd, modrm, contents + roff - 1);
1914 /* Convert "mov foo@GOT(%reg1), %reg2" to
1915 "lea foo@GOTOFF(%reg1), %reg2". */
1916 r_type = R_386_GOTOFF;
1922 /* Only R_386_32 is supported. */
1928 /* Convert "test %reg1, foo@GOT(%reg2)" to
1929 "test $foo, %reg1". */
1930 modrm = 0xc0 | (modrm & 0x38) >> 3;
1935 /* Convert "binop foo@GOT(%reg1), %reg2" to
1936 "binop $foo, %reg2". */
1938 | (modrm & 0x38) >> 3
1942 bfd_put_8 (abfd, modrm, contents + roff - 1);
1946 bfd_put_8 (abfd, opcode, contents + roff - 2);
1947 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1956 /* Rename some of the generic section flags to better document how they
1958 #define need_convert_load sec_flg0
1959 #define check_relocs_failed sec_flg1
1961 /* Look through the relocs for a section during the first phase, and
1962 calculate needed space in the global offset table, procedure linkage
1963 table, and dynamic reloc sections. */
1966 elf_i386_check_relocs (bfd *abfd,
1967 struct bfd_link_info *info,
1969 const Elf_Internal_Rela *relocs)
1971 struct elf_i386_link_hash_table *htab;
1972 Elf_Internal_Shdr *symtab_hdr;
1973 struct elf_link_hash_entry **sym_hashes;
1974 const Elf_Internal_Rela *rel;
1975 const Elf_Internal_Rela *rel_end;
1979 if (bfd_link_relocatable (info))
1982 /* Don't do anything special with non-loaded, non-alloced sections.
1983 In particular, any relocs in such sections should not affect GOT
1984 and PLT reference counting (ie. we don't allow them to create GOT
1985 or PLT entries), there's no possibility or desire to optimize TLS
1986 relocs, and there's not much point in propagating relocs to shared
1987 libs that the dynamic linker won't relocate. */
1988 if ((sec->flags & SEC_ALLOC) == 0)
1991 BFD_ASSERT (is_i386_elf (abfd));
1993 htab = elf_i386_hash_table (info);
1996 sec->check_relocs_failed = 1;
2000 /* Get the section contents. */
2001 if (elf_section_data (sec)->this_hdr.contents != NULL)
2002 contents = elf_section_data (sec)->this_hdr.contents;
2003 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2005 sec->check_relocs_failed = 1;
2009 symtab_hdr = &elf_symtab_hdr (abfd);
2010 sym_hashes = elf_sym_hashes (abfd);
2014 rel_end = relocs + sec->reloc_count;
2015 for (rel = relocs; rel < rel_end; rel++)
2017 unsigned int r_type;
2018 unsigned int r_symndx;
2019 struct elf_link_hash_entry *h;
2020 struct elf_i386_link_hash_entry *eh;
2021 Elf_Internal_Sym *isym;
2023 bfd_boolean size_reloc;
2025 r_symndx = ELF32_R_SYM (rel->r_info);
2026 r_type = ELF32_R_TYPE (rel->r_info);
2028 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
2030 /* xgettext:c-format */
2031 _bfd_error_handler (_("%B: bad symbol index: %d"),
2036 if (r_symndx < symtab_hdr->sh_info)
2038 /* A local symbol. */
2039 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2044 /* Check relocation against local STT_GNU_IFUNC symbol. */
2045 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2047 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
2051 /* Fake a STT_GNU_IFUNC symbol. */
2052 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
2054 h->type = STT_GNU_IFUNC;
2057 h->forced_local = 1;
2058 h->root.type = bfd_link_hash_defined;
2066 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2067 while (h->root.type == bfd_link_hash_indirect
2068 || h->root.type == bfd_link_hash_warning)
2069 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2072 eh = (struct elf_i386_link_hash_entry *) h;
2075 if (r_type == R_386_GOTOFF)
2078 /* It is referenced by a non-shared object. */
2080 h->root.non_ir_ref_regular = 1;
2082 if (h->type == STT_GNU_IFUNC)
2083 elf_tdata (info->output_bfd)->has_gnu_symbols
2084 |= elf_gnu_symbol_ifunc;
2087 if (! elf_i386_tls_transition (info, abfd, sec, contents,
2088 symtab_hdr, sym_hashes,
2089 &r_type, GOT_UNKNOWN,
2090 rel, rel_end, h, r_symndx, FALSE))
2096 htab->tls_ldm_got.refcount += 1;
2100 /* This symbol requires a procedure linkage table entry. We
2101 actually build the entry in adjust_dynamic_symbol,
2102 because this might be a case of linking PIC code which is
2103 never referenced by a dynamic object, in which case we
2104 don't need to generate a procedure linkage table entry
2107 /* If this is a local symbol, we resolve it directly without
2108 creating a procedure linkage table entry. */
2112 eh->has_got_reloc = 1;
2114 h->plt.refcount += 1;
2121 case R_386_TLS_IE_32:
2123 case R_386_TLS_GOTIE:
2124 if (!bfd_link_executable (info))
2125 info->flags |= DF_STATIC_TLS;
2131 case R_386_TLS_GOTDESC:
2132 case R_386_TLS_DESC_CALL:
2133 /* This symbol requires a global offset table entry. */
2135 int tls_type, old_tls_type;
2142 tls_type = GOT_NORMAL;
2144 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
2145 case R_386_TLS_GOTDESC:
2146 case R_386_TLS_DESC_CALL:
2147 tls_type = GOT_TLS_GDESC; break;
2148 case R_386_TLS_IE_32:
2149 if (ELF32_R_TYPE (rel->r_info) == r_type)
2150 tls_type = GOT_TLS_IE_NEG;
2152 /* If this is a GD->IE transition, we may use either of
2153 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
2154 tls_type = GOT_TLS_IE;
2157 case R_386_TLS_GOTIE:
2158 tls_type = GOT_TLS_IE_POS; break;
2163 h->got.refcount += 1;
2164 old_tls_type = elf_i386_hash_entry(h)->tls_type;
2168 bfd_signed_vma *local_got_refcounts;
2170 /* This is a global offset table entry for a local symbol. */
2171 local_got_refcounts = elf_local_got_refcounts (abfd);
2172 if (local_got_refcounts == NULL)
2176 size = symtab_hdr->sh_info;
2177 size *= (sizeof (bfd_signed_vma)
2178 + sizeof (bfd_vma) + sizeof(char));
2179 local_got_refcounts = (bfd_signed_vma *)
2180 bfd_zalloc (abfd, size);
2181 if (local_got_refcounts == NULL)
2183 elf_local_got_refcounts (abfd) = local_got_refcounts;
2184 elf_i386_local_tlsdesc_gotent (abfd)
2185 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2186 elf_i386_local_got_tls_type (abfd)
2187 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2189 local_got_refcounts[r_symndx] += 1;
2190 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
2193 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
2194 tls_type |= old_tls_type;
2195 /* If a TLS symbol is accessed using IE at least once,
2196 there is no point to use dynamic model for it. */
2197 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2198 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2199 || (tls_type & GOT_TLS_IE) == 0))
2201 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
2202 tls_type = old_tls_type;
2203 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2204 && GOT_TLS_GD_ANY_P (tls_type))
2205 tls_type |= old_tls_type;
2209 name = h->root.root.string;
2211 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
2214 /* xgettext:c-format */
2215 (_("%B: `%s' accessed both as normal and "
2216 "thread local symbol"),
2218 bfd_set_error (bfd_error_bad_value);
2223 if (old_tls_type != tls_type)
2226 elf_i386_hash_entry (h)->tls_type = tls_type;
2228 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
2236 if (r_type != R_386_TLS_IE)
2239 eh->has_got_reloc = 1;
2244 case R_386_TLS_LE_32:
2247 eh->has_got_reloc = 1;
2248 if (bfd_link_executable (info))
2250 info->flags |= DF_STATIC_TLS;
2255 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2256 eh->has_non_got_reloc = 1;
2258 /* We are called after all symbols have been resolved. Only
2259 relocation against STT_GNU_IFUNC symbol must go through
2262 && (bfd_link_executable (info)
2263 || h->type == STT_GNU_IFUNC))
2265 /* If this reloc is in a read-only section, we might
2266 need a copy reloc. We can't check reliably at this
2267 stage whether the section is read-only, as input
2268 sections have not yet been mapped to output sections.
2269 Tentatively set the flag for now, and correct in
2270 adjust_dynamic_symbol. */
2273 /* We may need a .plt entry if the symbol is a function
2274 defined in a shared lib or is a STT_GNU_IFUNC function
2275 referenced from the code or read-only section. */
2276 if ((h->type == STT_FUNC || h->type == STT_GNU_IFUNC)
2278 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0))
2279 h->plt.refcount += 1;
2281 if (r_type == R_386_PC32)
2283 /* Since something like ".long foo - ." may be used
2284 as pointer, make sure that PLT is used if foo is
2285 a function defined in a shared library. */
2286 if ((sec->flags & SEC_CODE) == 0)
2287 h->pointer_equality_needed = 1;
2288 else if (h->type == STT_GNU_IFUNC
2289 && bfd_link_pic (info))
2292 /* xgettext:c-format */
2293 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
2294 abfd, h->root.root.string);
2295 bfd_set_error (bfd_error_bad_value);
2301 h->pointer_equality_needed = 1;
2302 /* R_386_32 can be resolved at run-time. */
2303 if (r_type == R_386_32
2304 && (sec->flags & SEC_READONLY) == 0)
2305 eh->func_pointer_refcount += 1;
2311 /* If we are creating a shared library, and this is a reloc
2312 against a global symbol, or a non PC relative reloc
2313 against a local symbol, then we need to copy the reloc
2314 into the shared library. However, if we are linking with
2315 -Bsymbolic, we do not need to copy a reloc against a
2316 global symbol which is defined in an object we are
2317 including in the link (i.e., DEF_REGULAR is set). At
2318 this point we have not seen all the input files, so it is
2319 possible that DEF_REGULAR is not set now but will be set
2320 later (it is never cleared). In case of a weak definition,
2321 DEF_REGULAR may be cleared later by a strong definition in
2322 a shared library. We account for that possibility below by
2323 storing information in the relocs_copied field of the hash
2324 table entry. A similar situation occurs when creating
2325 shared libraries and symbol visibility changes render the
2328 If on the other hand, we are creating an executable, we
2329 may need to keep relocations for symbols satisfied by a
2330 dynamic library if we manage to avoid copy relocs for the
2333 Generate dynamic pointer relocation against STT_GNU_IFUNC
2334 symbol in the non-code section. */
2335 if ((bfd_link_pic (info)
2336 && (r_type != R_386_PC32
2338 && (! (bfd_link_pie (info)
2339 || SYMBOLIC_BIND (info, h))
2340 || h->root.type == bfd_link_hash_defweak
2341 || !h->def_regular))))
2343 && h->type == STT_GNU_IFUNC
2344 && r_type == R_386_32
2345 && (sec->flags & SEC_CODE) == 0)
2346 || (ELIMINATE_COPY_RELOCS
2347 && !bfd_link_pic (info)
2349 && (h->root.type == bfd_link_hash_defweak
2350 || !h->def_regular)))
2352 struct elf_dyn_relocs *p;
2353 struct elf_dyn_relocs **head;
2355 /* We must copy these reloc types into the output file.
2356 Create a reloc section in dynobj and make room for
2360 sreloc = _bfd_elf_make_dynamic_reloc_section
2361 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
2367 /* If this is a global symbol, we count the number of
2368 relocations we need for this symbol. */
2371 head = &eh->dyn_relocs;
2375 /* Track dynamic relocs needed for local syms too.
2376 We really need local syms available to do this
2381 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2386 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2390 vpp = &elf_section_data (s)->local_dynrel;
2391 head = (struct elf_dyn_relocs **)vpp;
2395 if (p == NULL || p->sec != sec)
2397 bfd_size_type amt = sizeof *p;
2398 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
2410 /* Count size relocation as PC-relative relocation. */
2411 if (r_type == R_386_PC32 || size_reloc)
2416 /* This relocation describes the C++ object vtable hierarchy.
2417 Reconstruct it for later use during GC. */
2418 case R_386_GNU_VTINHERIT:
2419 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2423 /* This relocation describes which C++ vtable entries are actually
2424 used. Record for later use during GC. */
2425 case R_386_GNU_VTENTRY:
2426 BFD_ASSERT (h != NULL);
2428 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
2436 if (r_type == R_386_GOT32X
2437 && (h == NULL || h->type != STT_GNU_IFUNC))
2438 sec->need_convert_load = 1;
2441 if (elf_section_data (sec)->this_hdr.contents != contents)
2443 if (!info->keep_memory)
2447 /* Cache the section contents for elf_link_input_bfd. */
2448 elf_section_data (sec)->this_hdr.contents = contents;
2455 if (elf_section_data (sec)->this_hdr.contents != contents)
2457 sec->check_relocs_failed = 1;
2461 /* Return the section that should be marked against GC for a given
2465 elf_i386_gc_mark_hook (asection *sec,
2466 struct bfd_link_info *info,
2467 Elf_Internal_Rela *rel,
2468 struct elf_link_hash_entry *h,
2469 Elf_Internal_Sym *sym)
2472 switch (ELF32_R_TYPE (rel->r_info))
2474 case R_386_GNU_VTINHERIT:
2475 case R_386_GNU_VTENTRY:
2479 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2482 /* Remove undefined weak symbol from the dynamic symbol table if it
2483 is resolved to 0. */
2486 elf_i386_fixup_symbol (struct bfd_link_info *info,
2487 struct elf_link_hash_entry *h)
2489 if (h->dynindx != -1
2490 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2491 elf_i386_hash_entry (h)->has_got_reloc,
2492 elf_i386_hash_entry (h)))
2495 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2501 /* Adjust a symbol defined by a dynamic object and referenced by a
2502 regular object. The current definition is in some section of the
2503 dynamic object, but we're not including those sections. We have to
2504 change the definition to something the rest of the link can
2508 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2509 struct elf_link_hash_entry *h)
2511 struct elf_i386_link_hash_table *htab;
2513 struct elf_i386_link_hash_entry *eh;
2514 struct elf_dyn_relocs *p;
2516 /* STT_GNU_IFUNC symbol must go through PLT. */
2517 if (h->type == STT_GNU_IFUNC)
2519 /* All local STT_GNU_IFUNC references must be treate as local
2520 calls via local PLT. */
2522 && SYMBOL_CALLS_LOCAL (info, h))
2524 bfd_size_type pc_count = 0, count = 0;
2525 struct elf_dyn_relocs **pp;
2527 eh = (struct elf_i386_link_hash_entry *) h;
2528 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2530 pc_count += p->pc_count;
2531 p->count -= p->pc_count;
2540 if (pc_count || count)
2545 /* Increment PLT reference count only for PC-relative
2548 if (h->plt.refcount <= 0)
2549 h->plt.refcount = 1;
2551 h->plt.refcount += 1;
2556 if (h->plt.refcount <= 0)
2558 h->plt.offset = (bfd_vma) -1;
2564 /* If this is a function, put it in the procedure linkage table. We
2565 will fill in the contents of the procedure linkage table later,
2566 when we know the address of the .got section. */
2567 if (h->type == STT_FUNC
2570 if (h->plt.refcount <= 0
2571 || SYMBOL_CALLS_LOCAL (info, h)
2572 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2573 && h->root.type == bfd_link_hash_undefweak))
2575 /* This case can occur if we saw a PLT32 reloc in an input
2576 file, but the symbol was never referred to by a dynamic
2577 object, or if all references were garbage collected. In
2578 such a case, we don't actually need to build a procedure
2579 linkage table, and we can just do a PC32 reloc instead. */
2580 h->plt.offset = (bfd_vma) -1;
2587 /* It's possible that we incorrectly decided a .plt reloc was
2588 needed for an R_386_PC32 reloc to a non-function sym in
2589 check_relocs. We can't decide accurately between function and
2590 non-function syms in check-relocs; Objects loaded later in
2591 the link may change h->type. So fix it now. */
2592 h->plt.offset = (bfd_vma) -1;
2594 /* If this is a weak symbol, and there is a real definition, the
2595 processor independent code will have arranged for us to see the
2596 real definition first, and we can just use the same value. */
2597 if (h->u.weakdef != NULL)
2599 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2600 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2601 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2602 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2603 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2604 h->non_got_ref = h->u.weakdef->non_got_ref;
2608 /* This is a reference to a symbol defined by a dynamic object which
2609 is not a function. */
2611 /* If we are creating a shared library, we must presume that the
2612 only references to the symbol are via the global offset table.
2613 For such cases we need not do anything here; the relocations will
2614 be handled correctly by relocate_section. */
2615 if (!bfd_link_executable (info))
2618 /* If there are no references to this symbol that do not use the
2619 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2621 eh = (struct elf_i386_link_hash_entry *) h;
2622 if (!h->non_got_ref && !eh->gotoff_ref)
2625 /* If -z nocopyreloc was given, we won't generate them either. */
2626 if (info->nocopyreloc)
2632 htab = elf_i386_hash_table (info);
2636 /* If there aren't any dynamic relocs in read-only sections nor
2637 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2638 avoid the copy reloc. This doesn't work on VxWorks, where we can
2639 not have dynamic relocations (other than copy and jump slot
2640 relocations) in an executable. */
2641 if (ELIMINATE_COPY_RELOCS
2643 && get_elf_i386_backend_data (info->output_bfd)->os != is_vxworks)
2645 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2647 s = p->sec->output_section;
2648 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2659 /* We must allocate the symbol in our .dynbss section, which will
2660 become part of the .bss section of the executable. There will be
2661 an entry for this symbol in the .dynsym section. The dynamic
2662 object will contain position independent code, so all references
2663 from the dynamic object to this symbol will go through the global
2664 offset table. The dynamic linker will use the .dynsym entry to
2665 determine the address it must put in the global offset table, so
2666 both the dynamic object and the regular object will refer to the
2667 same memory location for the variable. */
2669 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2670 copy the initial value out of the dynamic object and into the
2671 runtime process image. */
2672 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2674 s = htab->elf.sdynrelro;
2675 srel = htab->elf.sreldynrelro;
2679 s = htab->elf.sdynbss;
2680 srel = htab->elf.srelbss;
2682 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2684 srel->size += sizeof (Elf32_External_Rel);
2688 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2691 /* Allocate space in .plt, .got and associated reloc sections for
2695 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2697 struct bfd_link_info *info;
2698 struct elf_i386_link_hash_table *htab;
2699 struct elf_i386_link_hash_entry *eh;
2700 struct elf_dyn_relocs *p;
2701 unsigned plt_entry_size;
2702 bfd_boolean resolved_to_zero;
2703 const struct elf_i386_backend_data *bed;
2705 if (h->root.type == bfd_link_hash_indirect)
2708 eh = (struct elf_i386_link_hash_entry *) h;
2710 info = (struct bfd_link_info *) inf;
2711 htab = elf_i386_hash_table (info);
2715 bed = get_elf_i386_backend_data (info->output_bfd);
2717 plt_entry_size = htab->plt.plt_entry_size;
2719 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2723 /* Clear the reference count of function pointer relocations if
2724 symbol isn't a normal function. */
2725 if (h->type != STT_FUNC)
2726 eh->func_pointer_refcount = 0;
2728 /* We can't use the GOT PLT if pointer equality is needed since
2729 finish_dynamic_symbol won't clear symbol value and the dynamic
2730 linker won't update the GOT slot. We will get into an infinite
2731 loop at run-time. */
2732 if (htab->plt_got != NULL
2733 && h->type != STT_GNU_IFUNC
2734 && !h->pointer_equality_needed
2735 && h->plt.refcount > 0
2736 && h->got.refcount > 0)
2738 /* Don't use the regular PLT if there are both GOT and GOTPLT
2740 h->plt.offset = (bfd_vma) -1;
2742 /* Use the GOT PLT. */
2743 eh->plt_got.refcount = 1;
2746 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2747 here if it is defined and referenced in a non-shared object. */
2748 if (h->type == STT_GNU_IFUNC
2751 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2752 &htab->readonly_dynrelocs_against_ifunc,
2754 (htab->plt.has_plt0 *
2758 asection *s = htab->plt_second;
2759 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2761 /* Use the second PLT section if it is created. */
2762 eh->plt_second.offset = s->size;
2764 /* Make room for this entry in the second PLT section. */
2765 s->size += htab->non_lazy_plt->plt_entry_size;
2773 /* Don't create the PLT entry if there are only function pointer
2774 relocations which can be resolved at run-time. */
2775 else if (htab->elf.dynamic_sections_created
2776 && (h->plt.refcount > eh->func_pointer_refcount
2777 || eh->plt_got.refcount > 0))
2779 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
2781 /* Clear the reference count of function pointer relocations
2783 eh->func_pointer_refcount = 0;
2785 /* Make sure this symbol is output as a dynamic symbol.
2786 Undefined weak syms won't yet be marked as dynamic. */
2787 if (h->dynindx == -1
2789 && !resolved_to_zero
2790 && h->root.type == bfd_link_hash_undefweak)
2792 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2796 if (bfd_link_pic (info)
2797 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2799 asection *s = htab->elf.splt;
2800 asection *second_s = htab->plt_second;
2801 asection *got_s = htab->plt_got;
2803 /* If this is the first .plt entry, make room for the special
2804 first entry. The .plt section is used by prelink to undo
2805 prelinking for dynamic relocations. */
2807 s->size = htab->plt.has_plt0 * plt_entry_size;
2810 eh->plt_got.offset = got_s->size;
2813 h->plt.offset = s->size;
2815 eh->plt_second.offset = second_s->size;
2818 /* If this symbol is not defined in a regular file, and we are
2819 not generating a shared library, then set the symbol to this
2820 location in the .plt. This is required to make function
2821 pointers compare as equal between the normal executable and
2822 the shared library. */
2823 if (! bfd_link_pic (info)
2828 /* We need to make a call to the entry of the GOT PLT
2829 instead of regular PLT entry. */
2830 h->root.u.def.section = got_s;
2831 h->root.u.def.value = eh->plt_got.offset;
2837 /* We need to make a call to the entry of the
2838 second PLT instead of regular PLT entry. */
2839 h->root.u.def.section = second_s;
2840 h->root.u.def.value = eh->plt_second.offset;
2844 h->root.u.def.section = s;
2845 h->root.u.def.value = h->plt.offset;
2850 /* Make room for this entry. */
2852 got_s->size += htab->non_lazy_plt->plt_entry_size;
2855 s->size += plt_entry_size;
2857 second_s->size += htab->non_lazy_plt->plt_entry_size;
2859 /* We also need to make an entry in the .got.plt section,
2860 which will be placed in the .got section by the linker
2862 htab->elf.sgotplt->size += 4;
2864 /* There should be no PLT relocation against resolved
2865 undefined weak symbol in executable. */
2866 if (!resolved_to_zero)
2868 /* We also need to make an entry in the .rel.plt
2870 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2871 htab->elf.srelplt->reloc_count++;
2875 if (bed->os == is_vxworks && !bfd_link_pic (info))
2877 /* VxWorks has a second set of relocations for each PLT entry
2878 in executables. They go in a separate relocation section,
2879 which is processed by the kernel loader. */
2881 /* There are two relocations for the initial PLT entry: an
2882 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2883 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2885 if (h->plt.offset == plt_entry_size)
2886 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2888 /* There are two extra relocations for each subsequent PLT entry:
2889 an R_386_32 relocation for the GOT entry, and an R_386_32
2890 relocation for the PLT entry. */
2892 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2897 eh->plt_got.offset = (bfd_vma) -1;
2898 h->plt.offset = (bfd_vma) -1;
2904 eh->plt_got.offset = (bfd_vma) -1;
2905 h->plt.offset = (bfd_vma) -1;
2909 eh->tlsdesc_got = (bfd_vma) -1;
2911 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2912 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2913 if (h->got.refcount > 0
2914 && bfd_link_executable (info)
2916 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2917 h->got.offset = (bfd_vma) -1;
2918 else if (h->got.refcount > 0)
2922 int tls_type = elf_i386_hash_entry(h)->tls_type;
2924 /* Make sure this symbol is output as a dynamic symbol.
2925 Undefined weak syms won't yet be marked as dynamic. */
2926 if (h->dynindx == -1
2928 && !resolved_to_zero
2929 && h->root.type == bfd_link_hash_undefweak)
2931 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2936 if (GOT_TLS_GDESC_P (tls_type))
2938 eh->tlsdesc_got = htab->elf.sgotplt->size
2939 - elf_i386_compute_jump_table_size (htab);
2940 htab->elf.sgotplt->size += 8;
2941 h->got.offset = (bfd_vma) -2;
2943 if (! GOT_TLS_GDESC_P (tls_type)
2944 || GOT_TLS_GD_P (tls_type))
2946 h->got.offset = s->size;
2948 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2949 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2952 dyn = htab->elf.dynamic_sections_created;
2953 /* R_386_TLS_IE_32 needs one dynamic relocation,
2954 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2955 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2956 need two), R_386_TLS_GD needs one if local symbol and two if
2957 global. No dynamic relocation against resolved undefined weak
2958 symbol in executable. */
2959 if (tls_type == GOT_TLS_IE_BOTH)
2960 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2961 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2962 || (tls_type & GOT_TLS_IE))
2963 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2964 else if (GOT_TLS_GD_P (tls_type))
2965 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2966 else if (! GOT_TLS_GDESC_P (tls_type)
2967 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2968 && !resolved_to_zero)
2969 || h->root.type != bfd_link_hash_undefweak)
2970 && (bfd_link_pic (info)
2971 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2972 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2973 if (GOT_TLS_GDESC_P (tls_type))
2974 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2977 h->got.offset = (bfd_vma) -1;
2979 if (eh->dyn_relocs == NULL)
2982 /* In the shared -Bsymbolic case, discard space allocated for
2983 dynamic pc-relative relocs against symbols which turn out to be
2984 defined in regular objects. For the normal shared case, discard
2985 space for pc-relative relocs that have become local due to symbol
2986 visibility changes. */
2988 if (bfd_link_pic (info))
2990 /* The only reloc that uses pc_count is R_386_PC32, which will
2991 appear on a call or on something like ".long foo - .". We
2992 want calls to protected symbols to resolve directly to the
2993 function rather than going via the plt. If people want
2994 function pointer comparisons to work as expected then they
2995 should avoid writing assembly like ".long foo - .". */
2996 if (SYMBOL_CALLS_LOCAL (info, h))
2998 struct elf_dyn_relocs **pp;
3000 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3002 p->count -= p->pc_count;
3011 if (bed->os == is_vxworks)
3013 struct elf_dyn_relocs **pp;
3014 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3016 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
3023 /* Also discard relocs on undefined weak syms with non-default
3024 visibility or in PIE. */
3025 if (eh->dyn_relocs != NULL
3026 && h->root.type == bfd_link_hash_undefweak)
3028 /* Undefined weak symbol is never bound locally in shared
3030 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
3031 || resolved_to_zero)
3035 /* Keep dynamic non-GOT/non-PLT relocation so that we
3036 can branch to 0 without PLT. */
3037 struct elf_dyn_relocs **pp;
3039 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
3040 if (p->pc_count == 0)
3044 /* Remove non-R_386_PC32 relocation. */
3045 p->count = p->pc_count;
3049 if (eh->dyn_relocs != NULL)
3051 /* Make sure undefined weak symbols are output
3052 as dynamic symbols in PIEs for dynamic non-GOT
3053 non-PLT reloations. */
3054 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3059 eh->dyn_relocs = NULL;
3061 else if (h->dynindx == -1
3062 && !h->forced_local)
3064 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3069 else if (ELIMINATE_COPY_RELOCS)
3071 /* For the non-shared case, discard space for relocs against
3072 symbols which turn out to need copy relocs or are not
3073 dynamic. Keep dynamic relocations for run-time function
3074 pointer initialization. */
3076 if ((!h->non_got_ref
3077 || eh->func_pointer_refcount > 0
3078 || (h->root.type == bfd_link_hash_undefweak
3079 && !resolved_to_zero))
3082 || (htab->elf.dynamic_sections_created
3083 && (h->root.type == bfd_link_hash_undefweak
3084 || h->root.type == bfd_link_hash_undefined))))
3086 /* Make sure this symbol is output as a dynamic symbol.
3087 Undefined weak syms won't yet be marked as dynamic. */
3088 if (h->dynindx == -1
3090 && !resolved_to_zero
3091 && h->root.type == bfd_link_hash_undefweak)
3093 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3097 /* If that succeeded, we know we'll be keeping all the
3099 if (h->dynindx != -1)
3103 eh->dyn_relocs = NULL;
3104 eh->func_pointer_refcount = 0;
3109 /* Finally, allocate space. */
3110 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3114 sreloc = elf_section_data (p->sec)->sreloc;
3116 BFD_ASSERT (sreloc != NULL);
3117 sreloc->size += p->count * sizeof (Elf32_External_Rel);
3123 /* Allocate space in .plt, .got and associated reloc sections for
3124 local dynamic relocs. */
3127 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
3129 struct elf_link_hash_entry *h
3130 = (struct elf_link_hash_entry *) *slot;
3132 if (h->type != STT_GNU_IFUNC
3136 || h->root.type != bfd_link_hash_defined)
3139 return elf_i386_allocate_dynrelocs (h, inf);
3142 /* Find any dynamic relocs that apply to read-only sections. */
3145 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3147 struct elf_i386_link_hash_entry *eh;
3148 struct elf_dyn_relocs *p;
3150 /* Skip local IFUNC symbols. */
3151 if (h->forced_local && h->type == STT_GNU_IFUNC)
3154 eh = (struct elf_i386_link_hash_entry *) h;
3155 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3157 asection *s = p->sec->output_section;
3159 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3161 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3163 info->flags |= DF_TEXTREL;
3165 if ((info->warn_shared_textrel && bfd_link_pic (info))
3166 || info->error_textrel)
3167 /* xgettext:c-format */
3168 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3169 p->sec->owner, h->root.root.string,
3172 /* Not an error, just cut short the traversal. */
3179 /* Convert load via the GOT slot to load immediate. */
3182 elf_i386_convert_load (bfd *abfd, asection *sec,
3183 struct bfd_link_info *link_info)
3185 struct elf_i386_link_hash_table *htab;
3186 Elf_Internal_Shdr *symtab_hdr;
3187 Elf_Internal_Rela *internal_relocs;
3188 Elf_Internal_Rela *irel, *irelend;
3190 bfd_boolean changed;
3191 bfd_signed_vma *local_got_refcounts;
3193 /* Don't even try to convert non-ELF outputs. */
3194 if (!is_elf_hash_table (link_info->hash))
3197 /* Nothing to do if there is no need or no output. */
3198 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
3199 || sec->need_convert_load == 0
3200 || bfd_is_abs_section (sec->output_section))
3203 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3205 /* Load the relocations for this section. */
3206 internal_relocs = (_bfd_elf_link_read_relocs
3207 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3208 link_info->keep_memory));
3209 if (internal_relocs == NULL)
3213 htab = elf_i386_hash_table (link_info);
3214 local_got_refcounts = elf_local_got_refcounts (abfd);
3216 /* Get the section contents. */
3217 if (elf_section_data (sec)->this_hdr.contents != NULL)
3218 contents = elf_section_data (sec)->this_hdr.contents;
3221 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3225 irelend = internal_relocs + sec->reloc_count;
3226 for (irel = internal_relocs; irel < irelend; irel++)
3228 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3229 unsigned int r_symndx;
3230 struct elf_link_hash_entry *h;
3231 bfd_boolean converted;
3233 /* Don't convert R_386_GOT32 since we can't tell if it is applied
3234 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
3235 if (r_type != R_386_GOT32X)
3238 r_symndx = ELF32_R_SYM (irel->r_info);
3239 if (r_symndx < symtab_hdr->sh_info)
3240 h = elf_i386_get_local_sym_hash (htab, sec->owner,
3241 (const Elf_Internal_Rela *) irel,
3245 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
3246 while (h->root.type == bfd_link_hash_indirect
3247 || h->root.type == bfd_link_hash_warning)
3248 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3251 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3252 if (h != NULL && h->type == STT_GNU_IFUNC)
3256 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
3257 irel, h, &converted, link_info))
3262 changed = converted;
3265 if (h->got.refcount > 0)
3266 h->got.refcount -= 1;
3270 if (local_got_refcounts != NULL
3271 && local_got_refcounts[r_symndx] > 0)
3272 local_got_refcounts[r_symndx] -= 1;
3277 if (contents != NULL
3278 && elf_section_data (sec)->this_hdr.contents != contents)
3280 if (!changed && !link_info->keep_memory)
3284 /* Cache the section contents for elf_link_input_bfd. */
3285 elf_section_data (sec)->this_hdr.contents = contents;
3289 if (elf_section_data (sec)->relocs != internal_relocs)
3292 free (internal_relocs);
3294 elf_section_data (sec)->relocs = internal_relocs;
3300 if (contents != NULL
3301 && elf_section_data (sec)->this_hdr.contents != contents)
3303 if (internal_relocs != NULL
3304 && elf_section_data (sec)->relocs != internal_relocs)
3305 free (internal_relocs);
3309 /* Set the sizes of the dynamic sections. */
3312 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
3314 struct elf_i386_link_hash_table *htab;
3320 htab = elf_i386_hash_table (info);
3323 dynobj = htab->elf.dynobj;
3327 /* Set up .got offsets for local syms, and space for local dynamic
3329 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3331 bfd_signed_vma *local_got;
3332 bfd_signed_vma *end_local_got;
3333 char *local_tls_type;
3334 bfd_vma *local_tlsdesc_gotent;
3335 bfd_size_type locsymcount;
3336 Elf_Internal_Shdr *symtab_hdr;
3339 if (! is_i386_elf (ibfd))
3342 for (s = ibfd->sections; s != NULL; s = s->next)
3344 struct elf_dyn_relocs *p;
3346 if (!elf_i386_convert_load (ibfd, s, info))
3349 for (p = ((struct elf_dyn_relocs *)
3350 elf_section_data (s)->local_dynrel);
3354 if (!bfd_is_abs_section (p->sec)
3355 && bfd_is_abs_section (p->sec->output_section))
3357 /* Input section has been discarded, either because
3358 it is a copy of a linkonce section or due to
3359 linker script /DISCARD/, so we'll be discarding
3362 else if ((get_elf_i386_backend_data (output_bfd)->os
3364 && strcmp (p->sec->output_section->name,
3367 /* Relocations in vxworks .tls_vars sections are
3368 handled specially by the loader. */
3370 else if (p->count != 0)
3372 srel = elf_section_data (p->sec)->sreloc;
3373 srel->size += p->count * sizeof (Elf32_External_Rel);
3374 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3375 && (info->flags & DF_TEXTREL) == 0)
3377 info->flags |= DF_TEXTREL;
3378 if ((info->warn_shared_textrel && bfd_link_pic (info))
3379 || info->error_textrel)
3380 /* xgettext:c-format */
3381 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3382 p->sec->owner, p->sec);
3388 local_got = elf_local_got_refcounts (ibfd);
3392 symtab_hdr = &elf_symtab_hdr (ibfd);
3393 locsymcount = symtab_hdr->sh_info;
3394 end_local_got = local_got + locsymcount;
3395 local_tls_type = elf_i386_local_got_tls_type (ibfd);
3396 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
3398 srel = htab->elf.srelgot;
3399 for (; local_got < end_local_got;
3400 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3402 *local_tlsdesc_gotent = (bfd_vma) -1;
3405 if (GOT_TLS_GDESC_P (*local_tls_type))
3407 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3408 - elf_i386_compute_jump_table_size (htab);
3409 htab->elf.sgotplt->size += 8;
3410 *local_got = (bfd_vma) -2;
3412 if (! GOT_TLS_GDESC_P (*local_tls_type)
3413 || GOT_TLS_GD_P (*local_tls_type))
3415 *local_got = s->size;
3417 if (GOT_TLS_GD_P (*local_tls_type)
3418 || *local_tls_type == GOT_TLS_IE_BOTH)
3421 if (bfd_link_pic (info)
3422 || GOT_TLS_GD_ANY_P (*local_tls_type)
3423 || (*local_tls_type & GOT_TLS_IE))
3425 if (*local_tls_type == GOT_TLS_IE_BOTH)
3426 srel->size += 2 * sizeof (Elf32_External_Rel);
3427 else if (GOT_TLS_GD_P (*local_tls_type)
3428 || ! GOT_TLS_GDESC_P (*local_tls_type))
3429 srel->size += sizeof (Elf32_External_Rel);
3430 if (GOT_TLS_GDESC_P (*local_tls_type))
3431 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
3435 *local_got = (bfd_vma) -1;
3439 if (htab->tls_ldm_got.refcount > 0)
3441 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3443 htab->tls_ldm_got.offset = htab->elf.sgot->size;
3444 htab->elf.sgot->size += 8;
3445 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
3448 htab->tls_ldm_got.offset = -1;
3450 /* Allocate global sym .plt and .got entries, and space for global
3451 sym dynamic relocs. */
3452 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
3454 /* Allocate .plt and .got entries, and space for local symbols. */
3455 htab_traverse (htab->loc_hash_table,
3456 elf_i386_allocate_local_dynrelocs,
3459 /* For every jump slot reserved in the sgotplt, reloc_count is
3460 incremented. However, when we reserve space for TLS descriptors,
3461 it's not incremented, so in order to compute the space reserved
3462 for them, it suffices to multiply the reloc count by the jump
3465 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3466 so that R_386_IRELATIVE entries come last. */
3467 if (htab->elf.srelplt)
3469 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
3470 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
3471 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3473 else if (htab->elf.irelplt)
3474 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3477 if (htab->elf.sgotplt)
3479 /* Don't allocate .got.plt section if there are no GOT nor PLT
3480 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3481 if ((htab->elf.hgot == NULL
3482 || !htab->elf.hgot->ref_regular_nonweak)
3483 && (htab->elf.sgotplt->size
3484 == get_elf_backend_data (output_bfd)->got_header_size)
3485 && (htab->elf.splt == NULL
3486 || htab->elf.splt->size == 0)
3487 && (htab->elf.sgot == NULL
3488 || htab->elf.sgot->size == 0)
3489 && (htab->elf.iplt == NULL
3490 || htab->elf.iplt->size == 0)
3491 && (htab->elf.igotplt == NULL
3492 || htab->elf.igotplt->size == 0))
3493 htab->elf.sgotplt->size = 0;
3496 if (_bfd_elf_eh_frame_present (info))
3498 if (htab->plt_eh_frame != NULL
3499 && htab->elf.splt != NULL
3500 && htab->elf.splt->size != 0
3501 && !bfd_is_abs_section (htab->elf.splt->output_section))
3502 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
3504 if (htab->plt_got_eh_frame != NULL
3505 && htab->plt_got != NULL
3506 && htab->plt_got->size != 0
3507 && !bfd_is_abs_section (htab->plt_got->output_section))
3508 htab->plt_got_eh_frame->size
3509 = htab->non_lazy_plt->eh_frame_plt_size;
3511 /* Unwind info for the second PLT and .plt.got sections are
3513 if (htab->plt_second_eh_frame != NULL
3514 && htab->plt_second != NULL
3515 && htab->plt_second->size != 0
3516 && !bfd_is_abs_section (htab->plt_second->output_section))
3517 htab->plt_second_eh_frame->size
3518 = htab->non_lazy_plt->eh_frame_plt_size;
3521 /* We now have determined the sizes of the various dynamic sections.
3522 Allocate memory for them. */
3524 for (s = dynobj->sections; s != NULL; s = s->next)
3526 bfd_boolean strip_section = TRUE;
3528 if ((s->flags & SEC_LINKER_CREATED) == 0)
3531 if (s == htab->elf.splt
3532 || s == htab->elf.sgot)
3534 /* Strip this section if we don't need it; see the
3536 /* We'd like to strip these sections if they aren't needed, but if
3537 we've exported dynamic symbols from them we must leave them.
3538 It's too late to tell BFD to get rid of the symbols. */
3540 if (htab->elf.hplt != NULL)
3541 strip_section = FALSE;
3543 else if (s == htab->elf.sgotplt
3544 || s == htab->elf.iplt
3545 || s == htab->elf.igotplt
3546 || s == htab->plt_second
3547 || s == htab->plt_got
3548 || s == htab->plt_eh_frame
3549 || s == htab->plt_got_eh_frame
3550 || s == htab->plt_second_eh_frame
3551 || s == htab->elf.sdynbss
3552 || s == htab->elf.sdynrelro)
3554 /* Strip these too. */
3556 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
3559 && s != htab->elf.srelplt
3560 && s != htab->srelplt2)
3563 /* We use the reloc_count field as a counter if we need
3564 to copy relocs into the output file. */
3569 /* It's not one of our sections, so don't allocate space. */
3575 /* If we don't need this section, strip it from the
3576 output file. This is mostly to handle .rel.bss and
3577 .rel.plt. We must create both sections in
3578 create_dynamic_sections, because they must be created
3579 before the linker maps input sections to output
3580 sections. The linker does that before
3581 adjust_dynamic_symbol is called, and it is that
3582 function which decides whether anything needs to go
3583 into these sections. */
3585 s->flags |= SEC_EXCLUDE;
3589 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3592 /* Allocate memory for the section contents. We use bfd_zalloc
3593 here in case unused entries are not reclaimed before the
3594 section's contents are written out. This should not happen,
3595 but this way if it does, we get a R_386_NONE reloc instead
3597 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3598 if (s->contents == NULL)
3602 if (htab->plt_eh_frame != NULL
3603 && htab->plt_eh_frame->contents != NULL)
3605 memcpy (htab->plt_eh_frame->contents,
3606 htab->plt.eh_frame_plt,
3607 htab->plt_eh_frame->size);
3608 bfd_put_32 (dynobj, htab->elf.splt->size,
3609 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3612 if (htab->plt_got_eh_frame != NULL
3613 && htab->plt_got_eh_frame->contents != NULL)
3615 memcpy (htab->plt_got_eh_frame->contents,
3616 htab->non_lazy_plt->eh_frame_plt,
3617 htab->plt_got_eh_frame->size);
3618 bfd_put_32 (dynobj, htab->plt_got->size,
3619 (htab->plt_got_eh_frame->contents
3620 + PLT_FDE_LEN_OFFSET));
3623 if (htab->plt_second_eh_frame != NULL
3624 && htab->plt_second_eh_frame->contents != NULL)
3626 memcpy (htab->plt_second_eh_frame->contents,
3627 htab->non_lazy_plt->eh_frame_plt,
3628 htab->plt_second_eh_frame->size);
3629 bfd_put_32 (dynobj, htab->plt_second->size,
3630 (htab->plt_second_eh_frame->contents
3631 + PLT_FDE_LEN_OFFSET));
3634 if (htab->elf.dynamic_sections_created)
3636 /* Add some entries to the .dynamic section. We fill in the
3637 values later, in elf_i386_finish_dynamic_sections, but we
3638 must add the entries now so that we get the correct size for
3639 the .dynamic section. The DT_DEBUG entry is filled in by the
3640 dynamic linker and used by the debugger. */
3641 #define add_dynamic_entry(TAG, VAL) \
3642 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3644 if (bfd_link_executable (info))
3646 if (!add_dynamic_entry (DT_DEBUG, 0))
3650 if (htab->elf.splt->size != 0)
3652 /* DT_PLTGOT is used by prelink even if there is no PLT
3654 if (!add_dynamic_entry (DT_PLTGOT, 0))
3658 if (htab->elf.srelplt->size != 0)
3660 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3661 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3662 || !add_dynamic_entry (DT_JMPREL, 0))
3668 if (!add_dynamic_entry (DT_REL, 0)
3669 || !add_dynamic_entry (DT_RELSZ, 0)
3670 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3673 /* If any dynamic relocs apply to a read-only section,
3674 then we need a DT_TEXTREL entry. */
3675 if ((info->flags & DF_TEXTREL) == 0)
3676 elf_link_hash_traverse (&htab->elf,
3677 elf_i386_readonly_dynrelocs, info);
3679 if ((info->flags & DF_TEXTREL) != 0)
3681 if (htab->readonly_dynrelocs_against_ifunc)
3683 info->callbacks->einfo
3684 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3685 bfd_set_error (bfd_error_bad_value);
3689 if (!add_dynamic_entry (DT_TEXTREL, 0))
3693 if (get_elf_i386_backend_data (output_bfd)->os == is_vxworks
3694 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3697 #undef add_dynamic_entry
3703 elf_i386_always_size_sections (bfd *output_bfd,
3704 struct bfd_link_info *info)
3706 asection *tls_sec = elf_hash_table (info)->tls_sec;
3710 struct elf_link_hash_entry *tlsbase;
3712 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3713 "_TLS_MODULE_BASE_",
3714 FALSE, FALSE, FALSE);
3716 if (tlsbase && tlsbase->type == STT_TLS)
3718 struct elf_i386_link_hash_table *htab;
3719 struct bfd_link_hash_entry *bh = NULL;
3720 const struct elf_backend_data *bed
3721 = get_elf_backend_data (output_bfd);
3723 htab = elf_i386_hash_table (info);
3727 if (!(_bfd_generic_link_add_one_symbol
3728 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3729 tls_sec, 0, NULL, FALSE,
3730 bed->collect, &bh)))
3733 htab->tls_module_base = bh;
3735 tlsbase = (struct elf_link_hash_entry *)bh;
3736 tlsbase->def_regular = 1;
3737 tlsbase->other = STV_HIDDEN;
3738 tlsbase->root.linker_def = 1;
3739 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3746 /* Set the correct type for an x86 ELF section. We do this by the
3747 section name, which is a hack, but ought to work. */
3750 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3751 Elf_Internal_Shdr *hdr,
3756 name = bfd_get_section_name (abfd, sec);
3758 /* This is an ugly, but unfortunately necessary hack that is
3759 needed when producing EFI binaries on x86. It tells
3760 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3761 containing ELF relocation info. We need this hack in order to
3762 be able to generate ELF binaries that can be translated into
3763 EFI applications (which are essentially COFF objects). Those
3764 files contain a COFF ".reloc" section inside an ELFNN object,
3765 which would normally cause BFD to segfault because it would
3766 attempt to interpret this section as containing relocation
3767 entries for section "oc". With this hack enabled, ".reloc"
3768 will be treated as a normal data section, which will avoid the
3769 segfault. However, you won't be able to create an ELFNN binary
3770 with a section named "oc" that needs relocations, but that's
3771 the kind of ugly side-effects you get when detecting section
3772 types based on their names... In practice, this limitation is
3773 unlikely to bite. */
3774 if (strcmp (name, ".reloc") == 0)
3775 hdr->sh_type = SHT_PROGBITS;
3780 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3781 executables. Rather than setting it to the beginning of the TLS
3782 section, we have to set it to the end. This function may be called
3783 multiple times, it is idempotent. */
3786 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3788 struct elf_i386_link_hash_table *htab;
3789 struct bfd_link_hash_entry *base;
3791 if (!bfd_link_executable (info))
3794 htab = elf_i386_hash_table (info);
3798 base = htab->tls_module_base;
3802 base->u.def.value = htab->elf.tls_size;
3805 /* Return the base VMA address which should be subtracted from real addresses
3806 when resolving @dtpoff relocation.
3807 This is PT_TLS segment p_vaddr. */
3810 elf_i386_dtpoff_base (struct bfd_link_info *info)
3812 /* If tls_sec is NULL, we should have signalled an error already. */
3813 if (elf_hash_table (info)->tls_sec == NULL)
3815 return elf_hash_table (info)->tls_sec->vma;
3818 /* Return the relocation value for @tpoff relocation
3819 if STT_TLS virtual address is ADDRESS. */
3822 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3824 struct elf_link_hash_table *htab = elf_hash_table (info);
3825 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3826 bfd_vma static_tls_size;
3828 /* If tls_sec is NULL, we should have signalled an error already. */
3829 if (htab->tls_sec == NULL)
3832 /* Consider special static TLS alignment requirements. */
3833 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3834 return static_tls_size + htab->tls_sec->vma - address;
3837 /* Relocate an i386 ELF section. */
3840 elf_i386_relocate_section (bfd *output_bfd,
3841 struct bfd_link_info *info,
3843 asection *input_section,
3845 Elf_Internal_Rela *relocs,
3846 Elf_Internal_Sym *local_syms,
3847 asection **local_sections)
3849 struct elf_i386_link_hash_table *htab;
3850 Elf_Internal_Shdr *symtab_hdr;
3851 struct elf_link_hash_entry **sym_hashes;
3852 bfd_vma *local_got_offsets;
3853 bfd_vma *local_tlsdesc_gotents;
3854 Elf_Internal_Rela *rel;
3855 Elf_Internal_Rela *wrel;
3856 Elf_Internal_Rela *relend;
3857 bfd_boolean is_vxworks_tls;
3858 unsigned plt_entry_size;
3860 BFD_ASSERT (is_i386_elf (input_bfd));
3862 /* Skip if check_relocs failed. */
3863 if (input_section->check_relocs_failed)
3866 htab = elf_i386_hash_table (info);
3869 symtab_hdr = &elf_symtab_hdr (input_bfd);
3870 sym_hashes = elf_sym_hashes (input_bfd);
3871 local_got_offsets = elf_local_got_offsets (input_bfd);
3872 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3873 /* We have to handle relocations in vxworks .tls_vars sections
3874 specially, because the dynamic loader is 'weird'. */
3875 is_vxworks_tls = ((get_elf_i386_backend_data (output_bfd)->os
3877 && bfd_link_pic (info)
3878 && !strcmp (input_section->output_section->name,
3881 elf_i386_set_tls_module_base (info);
3883 plt_entry_size = htab->plt.plt_entry_size;
3885 rel = wrel = relocs;
3886 relend = relocs + input_section->reloc_count;
3887 for (; rel < relend; wrel++, rel++)
3889 unsigned int r_type;
3890 reloc_howto_type *howto;
3891 unsigned long r_symndx;
3892 struct elf_link_hash_entry *h;
3893 struct elf_i386_link_hash_entry *eh;
3894 Elf_Internal_Sym *sym;
3896 bfd_vma off, offplt, plt_offset;
3898 bfd_boolean unresolved_reloc;
3899 bfd_reloc_status_type r;
3903 asection *resolved_plt;
3904 bfd_boolean resolved_to_zero;
3905 bfd_boolean relative_reloc;
3907 r_type = ELF32_R_TYPE (rel->r_info);
3908 if (r_type == R_386_GNU_VTINHERIT
3909 || r_type == R_386_GNU_VTENTRY)
3916 if ((indx = r_type) >= R_386_standard
3917 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3918 >= R_386_ext - R_386_standard)
3919 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3920 >= R_386_ext2 - R_386_ext))
3921 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
3923 howto = elf_howto_table + indx;
3925 r_symndx = ELF32_R_SYM (rel->r_info);
3929 unresolved_reloc = FALSE;
3930 if (r_symndx < symtab_hdr->sh_info)
3932 sym = local_syms + r_symndx;
3933 sec = local_sections[r_symndx];
3934 relocation = (sec->output_section->vma
3935 + sec->output_offset
3937 st_size = sym->st_size;
3939 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3940 && ((sec->flags & SEC_MERGE) != 0
3941 || (bfd_link_relocatable (info)
3942 && sec->output_offset != 0)))
3945 bfd_byte *where = contents + rel->r_offset;
3947 switch (howto->size)
3950 addend = bfd_get_8 (input_bfd, where);
3951 if (howto->pc_relative)
3953 addend = (addend ^ 0x80) - 0x80;
3958 addend = bfd_get_16 (input_bfd, where);
3959 if (howto->pc_relative)
3961 addend = (addend ^ 0x8000) - 0x8000;
3966 addend = bfd_get_32 (input_bfd, where);
3967 if (howto->pc_relative)
3969 addend = (addend ^ 0x80000000) - 0x80000000;
3977 if (bfd_link_relocatable (info))
3978 addend += sec->output_offset;
3981 asection *msec = sec;
3982 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3984 addend -= relocation;
3985 addend += msec->output_section->vma + msec->output_offset;
3988 switch (howto->size)
3991 /* FIXME: overflow checks. */
3992 if (howto->pc_relative)
3994 bfd_put_8 (input_bfd, addend, where);
3997 if (howto->pc_relative)
3999 bfd_put_16 (input_bfd, addend, where);
4002 if (howto->pc_relative)
4004 bfd_put_32 (input_bfd, addend, where);
4008 else if (!bfd_link_relocatable (info)
4009 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4011 /* Relocate against local STT_GNU_IFUNC symbol. */
4012 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
4017 /* Set STT_GNU_IFUNC symbol value. */
4018 h->root.u.def.value = sym->st_value;
4019 h->root.u.def.section = sec;
4024 bfd_boolean warned ATTRIBUTE_UNUSED;
4025 bfd_boolean ignored ATTRIBUTE_UNUSED;
4027 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4028 r_symndx, symtab_hdr, sym_hashes,
4030 unresolved_reloc, warned, ignored);
4034 if (sec != NULL && discarded_section (sec))
4036 _bfd_clear_contents (howto, input_bfd, input_section,
4037 contents + rel->r_offset);
4038 wrel->r_offset = rel->r_offset;
4042 /* For ld -r, remove relocations in debug sections against
4043 sections defined in discarded sections. Not done for
4044 eh_frame editing code expects to be present. */
4045 if (bfd_link_relocatable (info)
4046 && (input_section->flags & SEC_DEBUGGING))
4052 if (bfd_link_relocatable (info))
4059 eh = (struct elf_i386_link_hash_entry *) h;
4061 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4062 it here if it is defined in a non-shared object. */
4064 && h->type == STT_GNU_IFUNC
4067 asection *gotplt, *base_got;
4071 if ((input_section->flags & SEC_ALLOC) == 0)
4073 /* Dynamic relocs are not propagated for SEC_DEBUGGING
4074 sections because such sections are not SEC_ALLOC and
4075 thus ld.so will not process them. */
4076 if ((input_section->flags & SEC_DEBUGGING) != 0)
4081 /* STT_GNU_IFUNC symbol must go through PLT. */
4082 if (htab->elf.splt != NULL)
4084 if (htab->plt_second != NULL)
4086 resolved_plt = htab->plt_second;
4087 plt_offset = eh->plt_second.offset;
4091 resolved_plt = htab->elf.splt;
4092 plt_offset = h->plt.offset;
4094 gotplt = htab->elf.sgotplt;
4098 resolved_plt = htab->elf.iplt;
4099 plt_offset = h->plt.offset;
4100 gotplt = htab->elf.igotplt;
4110 base_got = htab->elf.sgot;
4111 off = h->got.offset;
4113 if (base_got == NULL)
4116 if (off == (bfd_vma) -1)
4118 /* We can't use h->got.offset here to save state, or
4119 even just remember the offset, as finish_dynamic_symbol
4120 would use that as offset into .got. */
4122 if (h->plt.offset == (bfd_vma) -1)
4125 if (htab->elf.splt != NULL)
4127 plt_index = (h->plt.offset / plt_entry_size
4128 - htab->plt.has_plt0);
4129 off = (plt_index + 3) * 4;
4130 base_got = htab->elf.sgotplt;
4134 plt_index = h->plt.offset / plt_entry_size;
4135 off = plt_index * 4;
4136 base_got = htab->elf.igotplt;
4139 if (h->dynindx == -1
4143 /* This references the local defitionion. We must
4144 initialize this entry in the global offset table.
4145 Since the offset must always be a multiple of 8,
4146 we use the least significant bit to record
4147 whether we have initialized it already.
4149 When doing a dynamic link, we create a .rela.got
4150 relocation entry to initialize the value. This
4151 is done in the finish_dynamic_symbol routine. */
4156 bfd_put_32 (output_bfd, relocation,
4157 base_got->contents + off);
4165 relocation = (base_got->output_section->vma
4166 + base_got->output_offset + off
4167 - gotplt->output_section->vma
4168 - gotplt->output_offset);
4170 if (rel->r_offset > 1
4171 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
4172 && *(contents + rel->r_offset - 2) != 0x8d)
4174 if (bfd_link_pic (info))
4175 goto disallow_got32;
4177 /* Add the GOT base if there is no base register. */
4178 relocation += (gotplt->output_section->vma
4179 + gotplt->output_offset);
4181 else if (htab->elf.splt == NULL)
4183 /* Adjust for static executables. */
4184 relocation += gotplt->output_offset;
4190 if (h->plt.offset == (bfd_vma) -1)
4192 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4193 if (r_type == R_386_32
4194 && (input_section->flags & SEC_CODE) == 0)
4195 goto do_ifunc_pointer;
4196 goto bad_ifunc_reloc;
4199 relocation = (resolved_plt->output_section->vma
4200 + resolved_plt->output_offset + plt_offset);
4206 if (h->root.root.string)
4207 name = h->root.root.string;
4209 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4212 /* xgettext:c-format */
4213 (_("%B: relocation %s against STT_GNU_IFUNC "
4214 "symbol `%s' isn't supported"), input_bfd,
4216 bfd_set_error (bfd_error_bad_value);
4220 /* Generate dynamic relcoation only when there is a
4221 non-GOT reference in a shared object. */
4222 if ((bfd_link_pic (info) && h->non_got_ref)
4223 || h->plt.offset == (bfd_vma) -1)
4225 Elf_Internal_Rela outrel;
4230 /* Need a dynamic relocation to get the real function
4232 offset = _bfd_elf_section_offset (output_bfd,
4236 if (offset == (bfd_vma) -1
4237 || offset == (bfd_vma) -2)
4240 outrel.r_offset = (input_section->output_section->vma
4241 + input_section->output_offset
4244 if (h->dynindx == -1
4246 || bfd_link_executable (info))
4248 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4249 h->root.root.string,
4250 h->root.u.def.section->owner);
4252 /* This symbol is resolved locally. */
4253 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4254 bfd_put_32 (output_bfd,
4255 (h->root.u.def.value
4256 + h->root.u.def.section->output_section->vma
4257 + h->root.u.def.section->output_offset),
4261 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4263 /* Dynamic relocations are stored in
4264 1. .rel.ifunc section in PIC object.
4265 2. .rel.got section in dynamic executable.
4266 3. .rel.iplt section in static executable. */
4267 if (bfd_link_pic (info))
4268 sreloc = htab->elf.irelifunc;
4269 else if (htab->elf.splt != NULL)
4270 sreloc = htab->elf.srelgot;
4272 sreloc = htab->elf.irelplt;
4273 elf_append_rel (output_bfd, sreloc, &outrel);
4275 /* If this reloc is against an external symbol, we
4276 do not want to fiddle with the addend. Otherwise,
4277 we need to include the symbol value so that it
4278 becomes an addend for the dynamic reloc. For an
4279 internal symbol, we have updated addend. */
4288 relocation -= (gotplt->output_section->vma
4289 + gotplt->output_offset);
4294 resolved_to_zero = (eh != NULL
4295 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4302 /* Avoid optimizing _DYNAMIC since ld.so may use its
4303 link-time address. */
4304 if (h == htab->elf.hdynamic)
4307 if (bfd_link_pic (info))
4309 /* It is OK to convert mov to lea and convert indirect
4310 branch to direct branch. It is OK to convert adc,
4311 add, and, cmp, or, sbb, sub, test, xor only when PIC
4313 unsigned int opcode, addend;
4314 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
4317 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4318 if (opcode != 0x8b && opcode != 0xff)
4322 /* Resolve "mov GOT[(%reg)], %reg",
4323 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4324 and "binop foo@GOT[(%reg)], %reg". */
4326 || (h->plt.offset == (bfd_vma) -1
4327 && h->got.offset == (bfd_vma) -1)
4328 || htab->elf.sgotplt == NULL)
4331 offplt = (htab->elf.sgotplt->output_section->vma
4332 + htab->elf.sgotplt->output_offset);
4334 /* It is relative to .got.plt section. */
4335 if (h->got.offset != (bfd_vma) -1)
4336 /* Use GOT entry. Mask off the least significant bit in
4337 GOT offset which may be set by R_386_GOT32 processing
4339 relocation = (htab->elf.sgot->output_section->vma
4340 + htab->elf.sgot->output_offset
4341 + (h->got.offset & ~1) - offplt);
4343 /* Use GOTPLT entry. */
4344 relocation = (h->plt.offset / plt_entry_size
4345 - htab->plt.has_plt0 + 3) * 4;
4347 if (!bfd_link_pic (info))
4349 /* If not PIC, add the .got.plt section address for
4350 baseless addressing. */
4352 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4353 if ((modrm & 0xc7) == 0x5)
4354 relocation += offplt;
4357 unresolved_reloc = FALSE;
4362 /* Relocation is to the entry for this symbol in the global
4364 if (htab->elf.sgot == NULL)
4367 relative_reloc = FALSE;
4372 off = h->got.offset;
4373 dyn = htab->elf.dynamic_sections_created;
4374 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4375 bfd_link_pic (info),
4377 || (bfd_link_pic (info)
4378 && SYMBOL_REFERENCES_LOCAL (info, h))
4379 || (ELF_ST_VISIBILITY (h->other)
4380 && h->root.type == bfd_link_hash_undefweak))
4382 /* This is actually a static link, or it is a
4383 -Bsymbolic link and the symbol is defined
4384 locally, or the symbol was forced to be local
4385 because of a version file. We must initialize
4386 this entry in the global offset table. Since the
4387 offset must always be a multiple of 4, we use the
4388 least significant bit to record whether we have
4389 initialized it already.
4391 When doing a dynamic link, we create a .rel.got
4392 relocation entry to initialize the value. This
4393 is done in the finish_dynamic_symbol routine. */
4398 bfd_put_32 (output_bfd, relocation,
4399 htab->elf.sgot->contents + off);
4402 if (h->dynindx == -1
4404 && h->root.type != bfd_link_hash_undefweak
4405 && bfd_link_pic (info))
4407 /* PR ld/21402: If this symbol isn't dynamic
4408 in PIC, generate R_386_RELATIVE here. */
4409 eh->no_finish_dynamic_symbol = 1;
4410 relative_reloc = TRUE;
4415 unresolved_reloc = FALSE;
4419 if (local_got_offsets == NULL)
4422 off = local_got_offsets[r_symndx];
4424 /* The offset must always be a multiple of 4. We use
4425 the least significant bit to record whether we have
4426 already generated the necessary reloc. */
4431 bfd_put_32 (output_bfd, relocation,
4432 htab->elf.sgot->contents + off);
4433 local_got_offsets[r_symndx] |= 1;
4435 if (bfd_link_pic (info))
4436 relative_reloc = TRUE;
4443 Elf_Internal_Rela outrel;
4445 s = htab->elf.srelgot;
4449 outrel.r_offset = (htab->elf.sgot->output_section->vma
4450 + htab->elf.sgot->output_offset
4452 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4453 elf_append_rel (output_bfd, s, &outrel);
4456 if (off >= (bfd_vma) -2)
4459 relocation = (htab->elf.sgot->output_section->vma
4460 + htab->elf.sgot->output_offset + off);
4461 if (rel->r_offset > 1
4462 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
4463 && *(contents + rel->r_offset - 2) != 0x8d)
4465 if (bfd_link_pic (info))
4467 /* For PIC, disallow R_386_GOT32 without a base
4468 register, except for "lea foo@GOT, %reg", since
4469 we don't know what the GOT base is. */
4473 if (h == NULL || h->root.root.string == NULL)
4474 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4477 name = h->root.root.string;
4480 /* xgettext:c-format */
4481 (_("%B: direct GOT relocation %s against `%s'"
4482 " without base register can not be used"
4483 " when making a shared object"),
4484 input_bfd, howto->name, name);
4485 bfd_set_error (bfd_error_bad_value);
4491 /* Subtract the .got.plt section address only with a base
4493 relocation -= (htab->elf.sgotplt->output_section->vma
4494 + htab->elf.sgotplt->output_offset);
4500 /* Relocation is relative to the start of the global offset
4503 /* Check to make sure it isn't a protected function or data
4504 symbol for shared library since it may not be local when
4505 used as function address or with copy relocation. We also
4506 need to make sure that a symbol is referenced locally. */
4507 if (!bfd_link_executable (info) && h)
4509 if (!h->def_regular)
4513 switch (ELF_ST_VISIBILITY (h->other))
4516 v = _("hidden symbol");
4519 v = _("internal symbol");
4522 v = _("protected symbol");
4530 /* xgettext:c-format */
4531 (_("%B: relocation R_386_GOTOFF against undefined %s"
4532 " `%s' can not be used when making a shared object"),
4533 input_bfd, v, h->root.root.string);
4534 bfd_set_error (bfd_error_bad_value);
4537 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
4538 && (h->type == STT_FUNC
4539 || h->type == STT_OBJECT)
4540 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4543 /* xgettext:c-format */
4544 (_("%B: relocation R_386_GOTOFF against protected %s"
4545 " `%s' can not be used when making a shared object"),
4547 h->type == STT_FUNC ? "function" : "data",
4548 h->root.root.string);
4549 bfd_set_error (bfd_error_bad_value);
4554 /* Note that sgot is not involved in this
4555 calculation. We always want the start of .got.plt. If we
4556 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4557 permitted by the ABI, we might have to change this
4559 relocation -= htab->elf.sgotplt->output_section->vma
4560 + htab->elf.sgotplt->output_offset;
4564 /* Use global offset table as symbol value. */
4565 relocation = htab->elf.sgotplt->output_section->vma
4566 + htab->elf.sgotplt->output_offset;
4567 unresolved_reloc = FALSE;
4571 /* Relocation is to the entry for this symbol in the
4572 procedure linkage table. */
4574 /* Resolve a PLT32 reloc against a local symbol directly,
4575 without using the procedure linkage table. */
4579 if ((h->plt.offset == (bfd_vma) -1
4580 && eh->plt_got.offset == (bfd_vma) -1)
4581 || htab->elf.splt == NULL)
4583 /* We didn't make a PLT entry for this symbol. This
4584 happens when statically linking PIC code, or when
4585 using -Bsymbolic. */
4589 if (h->plt.offset != (bfd_vma) -1)
4591 if (htab->plt_second != NULL)
4593 resolved_plt = htab->plt_second;
4594 plt_offset = eh->plt_second.offset;
4598 resolved_plt = htab->elf.splt;
4599 plt_offset = h->plt.offset;
4604 resolved_plt = htab->plt_got;
4605 plt_offset = eh->plt_got.offset;
4608 relocation = (resolved_plt->output_section->vma
4609 + resolved_plt->output_offset
4611 unresolved_reloc = FALSE;
4615 /* Set to symbol size. */
4616 relocation = st_size;
4621 if ((input_section->flags & SEC_ALLOC) == 0
4625 /* Copy dynamic function pointer relocations. Don't generate
4626 dynamic relocations against resolved undefined weak symbols
4627 in PIE, except for R_386_PC32. */
4628 if ((bfd_link_pic (info)
4630 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4631 && (!resolved_to_zero
4632 || r_type == R_386_PC32))
4633 || h->root.type != bfd_link_hash_undefweak))
4634 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
4635 || !SYMBOL_CALLS_LOCAL (info, h)))
4636 || (ELIMINATE_COPY_RELOCS
4637 && !bfd_link_pic (info)
4641 || eh->func_pointer_refcount > 0
4642 || (h->root.type == bfd_link_hash_undefweak
4643 && !resolved_to_zero))
4644 && ((h->def_dynamic && !h->def_regular)
4645 /* Undefined weak symbol is bound locally when
4647 || h->root.type == bfd_link_hash_undefweak)))
4649 Elf_Internal_Rela outrel;
4650 bfd_boolean skip, relocate;
4653 /* When generating a shared object, these relocations
4654 are copied into the output file to be resolved at run
4661 _bfd_elf_section_offset (output_bfd, info, input_section,
4663 if (outrel.r_offset == (bfd_vma) -1)
4665 else if (outrel.r_offset == (bfd_vma) -2)
4666 skip = TRUE, relocate = TRUE;
4667 outrel.r_offset += (input_section->output_section->vma
4668 + input_section->output_offset);
4671 memset (&outrel, 0, sizeof outrel);
4674 && (r_type == R_386_PC32
4675 || !(bfd_link_executable (info)
4676 || SYMBOLIC_BIND (info, h))
4677 || !h->def_regular))
4678 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4681 /* This symbol is local, or marked to become local. */
4683 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4686 sreloc = elf_section_data (input_section)->sreloc;
4688 if (sreloc == NULL || sreloc->contents == NULL)
4690 r = bfd_reloc_notsupported;
4691 goto check_relocation_error;
4694 elf_append_rel (output_bfd, sreloc, &outrel);
4696 /* If this reloc is against an external symbol, we do
4697 not want to fiddle with the addend. Otherwise, we
4698 need to include the symbol value so that it becomes
4699 an addend for the dynamic reloc. */
4706 if (!bfd_link_executable (info))
4708 Elf_Internal_Rela outrel;
4711 outrel.r_offset = rel->r_offset
4712 + input_section->output_section->vma
4713 + input_section->output_offset;
4714 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4715 sreloc = elf_section_data (input_section)->sreloc;
4718 elf_append_rel (output_bfd, sreloc, &outrel);
4723 case R_386_TLS_GOTDESC:
4724 case R_386_TLS_DESC_CALL:
4725 case R_386_TLS_IE_32:
4726 case R_386_TLS_GOTIE:
4727 tls_type = GOT_UNKNOWN;
4728 if (h == NULL && local_got_offsets)
4729 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
4731 tls_type = elf_i386_hash_entry(h)->tls_type;
4732 if (tls_type == GOT_TLS_IE)
4733 tls_type = GOT_TLS_IE_NEG;
4735 if (! elf_i386_tls_transition (info, input_bfd,
4736 input_section, contents,
4737 symtab_hdr, sym_hashes,
4738 &r_type, tls_type, rel,
4739 relend, h, r_symndx, TRUE))
4742 if (r_type == R_386_TLS_LE_32)
4744 BFD_ASSERT (! unresolved_reloc);
4745 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4750 /* GD->LE transition. */
4751 type = *(contents + rel->r_offset - 2);
4755 leal foo@tlsgd(,%ebx,1), %eax
4756 call ___tls_get_addr@PLT
4759 subl $foo@tpoff, %eax
4760 (6 byte form of subl). */
4761 roff = rel->r_offset + 5;
4766 leal foo@tlsgd(%ebx), %eax
4767 call ___tls_get_addr@PLT
4770 leal foo@tlsgd(%reg), %eax
4771 call *___tls_get_addr@GOT(%reg)
4772 which may be converted to
4773 addr32 call ___tls_get_addr
4775 movl %gs:0, %eax; subl $foo@tpoff, %eax
4776 (6 byte form of subl). */
4777 roff = rel->r_offset + 6;
4779 memcpy (contents + roff - 8,
4780 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4781 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4783 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
4788 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4790 /* GDesc -> LE transition.
4791 It's originally something like:
4792 leal x@tlsdesc(%ebx), %eax
4796 Registers other than %eax may be set up here. */
4801 roff = rel->r_offset;
4802 val = bfd_get_8 (input_bfd, contents + roff - 1);
4804 /* Now modify the instruction as appropriate. */
4805 /* aoliva FIXME: remove the above and xor the byte
4807 bfd_put_8 (output_bfd, val ^ 0x86,
4808 contents + roff - 1);
4809 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4813 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4815 /* GDesc -> LE transition.
4823 roff = rel->r_offset;
4824 bfd_put_8 (output_bfd, 0x66, contents + roff);
4825 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4828 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4832 /* IE->LE transition:
4833 Originally it can be one of:
4841 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4844 /* movl foo, %eax. */
4845 bfd_put_8 (output_bfd, 0xb8,
4846 contents + rel->r_offset - 1);
4852 type = bfd_get_8 (input_bfd,
4853 contents + rel->r_offset - 2);
4858 bfd_put_8 (output_bfd, 0xc7,
4859 contents + rel->r_offset - 2);
4860 bfd_put_8 (output_bfd,
4861 0xc0 | ((val >> 3) & 7),
4862 contents + rel->r_offset - 1);
4866 bfd_put_8 (output_bfd, 0x81,
4867 contents + rel->r_offset - 2);
4868 bfd_put_8 (output_bfd,
4869 0xc0 | ((val >> 3) & 7),
4870 contents + rel->r_offset - 1);
4877 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4878 contents + rel->r_offset);
4883 unsigned int val, type;
4885 /* {IE_32,GOTIE}->LE transition:
4886 Originally it can be one of:
4887 subl foo(%reg1), %reg2
4888 movl foo(%reg1), %reg2
4889 addl foo(%reg1), %reg2
4892 movl $foo, %reg2 (6 byte form)
4893 addl $foo, %reg2. */
4894 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4895 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4899 bfd_put_8 (output_bfd, 0xc7,
4900 contents + rel->r_offset - 2);
4901 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4902 contents + rel->r_offset - 1);
4904 else if (type == 0x2b)
4907 bfd_put_8 (output_bfd, 0x81,
4908 contents + rel->r_offset - 2);
4909 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4910 contents + rel->r_offset - 1);
4912 else if (type == 0x03)
4915 bfd_put_8 (output_bfd, 0x81,
4916 contents + rel->r_offset - 2);
4917 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4918 contents + rel->r_offset - 1);
4922 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4923 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4924 contents + rel->r_offset);
4926 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4927 contents + rel->r_offset);
4932 if (htab->elf.sgot == NULL)
4937 off = h->got.offset;
4938 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4942 if (local_got_offsets == NULL)
4945 off = local_got_offsets[r_symndx];
4946 offplt = local_tlsdesc_gotents[r_symndx];
4953 Elf_Internal_Rela outrel;
4957 if (htab->elf.srelgot == NULL)
4960 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4962 if (GOT_TLS_GDESC_P (tls_type))
4965 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4966 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4967 <= htab->elf.sgotplt->size);
4968 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4969 + htab->elf.sgotplt->output_offset
4971 + htab->sgotplt_jump_table_size);
4972 sreloc = htab->elf.srelplt;
4973 loc = sreloc->contents;
4974 loc += (htab->next_tls_desc_index++
4975 * sizeof (Elf32_External_Rel));
4976 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4977 <= sreloc->contents + sreloc->size);
4978 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4981 BFD_ASSERT (! unresolved_reloc);
4982 bfd_put_32 (output_bfd,
4983 relocation - elf_i386_dtpoff_base (info),
4984 htab->elf.sgotplt->contents + offplt
4985 + htab->sgotplt_jump_table_size + 4);
4989 bfd_put_32 (output_bfd, 0,
4990 htab->elf.sgotplt->contents + offplt
4991 + htab->sgotplt_jump_table_size + 4);
4995 sreloc = htab->elf.srelgot;
4997 outrel.r_offset = (htab->elf.sgot->output_section->vma
4998 + htab->elf.sgot->output_offset + off);
5000 if (GOT_TLS_GD_P (tls_type))
5001 dr_type = R_386_TLS_DTPMOD32;
5002 else if (GOT_TLS_GDESC_P (tls_type))
5004 else if (tls_type == GOT_TLS_IE_POS)
5005 dr_type = R_386_TLS_TPOFF;
5007 dr_type = R_386_TLS_TPOFF32;
5009 if (dr_type == R_386_TLS_TPOFF && indx == 0)
5010 bfd_put_32 (output_bfd,
5011 relocation - elf_i386_dtpoff_base (info),
5012 htab->elf.sgot->contents + off);
5013 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
5014 bfd_put_32 (output_bfd,
5015 elf_i386_dtpoff_base (info) - relocation,
5016 htab->elf.sgot->contents + off);
5017 else if (dr_type != R_386_TLS_DESC)
5018 bfd_put_32 (output_bfd, 0,
5019 htab->elf.sgot->contents + off);
5020 outrel.r_info = ELF32_R_INFO (indx, dr_type);
5022 elf_append_rel (output_bfd, sreloc, &outrel);
5024 if (GOT_TLS_GD_P (tls_type))
5028 BFD_ASSERT (! unresolved_reloc);
5029 bfd_put_32 (output_bfd,
5030 relocation - elf_i386_dtpoff_base (info),
5031 htab->elf.sgot->contents + off + 4);
5035 bfd_put_32 (output_bfd, 0,
5036 htab->elf.sgot->contents + off + 4);
5037 outrel.r_info = ELF32_R_INFO (indx,
5038 R_386_TLS_DTPOFF32);
5039 outrel.r_offset += 4;
5040 elf_append_rel (output_bfd, sreloc, &outrel);
5043 else if (tls_type == GOT_TLS_IE_BOTH)
5045 bfd_put_32 (output_bfd,
5047 ? relocation - elf_i386_dtpoff_base (info)
5049 htab->elf.sgot->contents + off + 4);
5050 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
5051 outrel.r_offset += 4;
5052 elf_append_rel (output_bfd, sreloc, &outrel);
5059 local_got_offsets[r_symndx] |= 1;
5062 if (off >= (bfd_vma) -2
5063 && ! GOT_TLS_GDESC_P (tls_type))
5065 if (r_type == R_386_TLS_GOTDESC
5066 || r_type == R_386_TLS_DESC_CALL)
5068 relocation = htab->sgotplt_jump_table_size + offplt;
5069 unresolved_reloc = FALSE;
5071 else if (r_type == ELF32_R_TYPE (rel->r_info))
5073 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
5074 + htab->elf.sgotplt->output_offset;
5075 relocation = htab->elf.sgot->output_section->vma
5076 + htab->elf.sgot->output_offset + off - g_o_t;
5077 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
5078 && tls_type == GOT_TLS_IE_BOTH)
5080 if (r_type == R_386_TLS_IE)
5081 relocation += g_o_t;
5082 unresolved_reloc = FALSE;
5084 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
5086 unsigned int val, type;
5089 /* GD->IE transition. */
5090 type = *(contents + rel->r_offset - 2);
5091 val = *(contents + rel->r_offset - 1);
5095 leal foo@tlsgd(,%ebx,1), %eax
5096 call ___tls_get_addr@PLT
5099 subl $foo@gottpoff(%ebx), %eax. */
5101 roff = rel->r_offset - 3;
5106 leal foo@tlsgd(%ebx), %eax
5107 call ___tls_get_addr@PLT
5110 leal foo@tlsgd(%reg), %eax
5111 call *___tls_get_addr@GOT(%reg)
5112 which may be converted to
5113 addr32 call ___tls_get_addr
5116 subl $foo@gottpoff(%reg), %eax. */
5117 roff = rel->r_offset - 2;
5119 memcpy (contents + roff,
5120 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
5121 contents[roff + 7] = 0x80 | (val & 7);
5122 /* If foo is used only with foo@gotntpoff(%reg) and
5123 foo@indntpoff, but not with foo@gottpoff(%reg), change
5124 subl $foo@gottpoff(%reg), %eax
5126 addl $foo@gotntpoff(%reg), %eax. */
5127 if (tls_type == GOT_TLS_IE_POS)
5128 contents[roff + 6] = 0x03;
5129 bfd_put_32 (output_bfd,
5130 htab->elf.sgot->output_section->vma
5131 + htab->elf.sgot->output_offset + off
5132 - htab->elf.sgotplt->output_section->vma
5133 - htab->elf.sgotplt->output_offset,
5134 contents + roff + 8);
5135 /* Skip R_386_PLT32 and R_386_GOT32X. */
5140 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
5142 /* GDesc -> IE transition.
5143 It's originally something like:
5144 leal x@tlsdesc(%ebx), %eax
5147 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
5149 movl x@gottpoff(%ebx), %eax # before negl %eax
5151 Registers other than %eax may be set up here. */
5155 /* First, make sure it's a leal adding ebx to a 32-bit
5156 offset into any register, although it's probably
5157 almost always going to be eax. */
5158 roff = rel->r_offset;
5160 /* Now modify the instruction as appropriate. */
5161 /* To turn a leal into a movl in the form we use it, it
5162 suffices to change the first byte from 0x8d to 0x8b.
5163 aoliva FIXME: should we decide to keep the leal, all
5164 we have to do is remove the statement below, and
5165 adjust the relaxation of R_386_TLS_DESC_CALL. */
5166 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
5168 if (tls_type == GOT_TLS_IE_BOTH)
5171 bfd_put_32 (output_bfd,
5172 htab->elf.sgot->output_section->vma
5173 + htab->elf.sgot->output_offset + off
5174 - htab->elf.sgotplt->output_section->vma
5175 - htab->elf.sgotplt->output_offset,
5179 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
5181 /* GDesc -> IE transition.
5189 depending on how we transformed the TLS_GOTDESC above.
5194 roff = rel->r_offset;
5196 /* Now modify the instruction as appropriate. */
5197 if (tls_type != GOT_TLS_IE_NEG)
5200 bfd_put_8 (output_bfd, 0x66, contents + roff);
5201 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5206 bfd_put_8 (output_bfd, 0xf7, contents + roff);
5207 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
5217 if (! elf_i386_tls_transition (info, input_bfd,
5218 input_section, contents,
5219 symtab_hdr, sym_hashes,
5220 &r_type, GOT_UNKNOWN, rel,
5221 relend, h, r_symndx, TRUE))
5224 if (r_type != R_386_TLS_LDM)
5226 /* LD->LE transition. Change
5227 leal foo@tlsldm(%ebx) %eax
5228 call ___tls_get_addr@PLT
5232 leal 0(%esi,1), %esi
5234 leal foo@tlsldm(%reg) %eax
5235 call *___tls_get_addr@GOT(%reg)
5236 which may be converted to
5237 addr32 call ___tls_get_addr
5240 leal 0(%esi), %esi */
5241 BFD_ASSERT (r_type == R_386_TLS_LE_32);
5242 if (*(contents + rel->r_offset + 4) == 0xff
5243 || *(contents + rel->r_offset + 4) == 0x67)
5244 memcpy (contents + rel->r_offset - 2,
5245 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
5247 memcpy (contents + rel->r_offset - 2,
5248 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
5249 /* Skip R_386_PC32/R_386_PLT32. */
5255 if (htab->elf.sgot == NULL)
5258 off = htab->tls_ldm_got.offset;
5263 Elf_Internal_Rela outrel;
5265 if (htab->elf.srelgot == NULL)
5268 outrel.r_offset = (htab->elf.sgot->output_section->vma
5269 + htab->elf.sgot->output_offset + off);
5271 bfd_put_32 (output_bfd, 0,
5272 htab->elf.sgot->contents + off);
5273 bfd_put_32 (output_bfd, 0,
5274 htab->elf.sgot->contents + off + 4);
5275 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
5276 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
5277 htab->tls_ldm_got.offset |= 1;
5279 relocation = htab->elf.sgot->output_section->vma
5280 + htab->elf.sgot->output_offset + off
5281 - htab->elf.sgotplt->output_section->vma
5282 - htab->elf.sgotplt->output_offset;
5283 unresolved_reloc = FALSE;
5286 case R_386_TLS_LDO_32:
5287 if (!bfd_link_executable (info)
5288 || (input_section->flags & SEC_CODE) == 0)
5289 relocation -= elf_i386_dtpoff_base (info);
5291 /* When converting LDO to LE, we must negate. */
5292 relocation = -elf_i386_tpoff (info, relocation);
5295 case R_386_TLS_LE_32:
5297 if (!bfd_link_executable (info))
5299 Elf_Internal_Rela outrel;
5302 outrel.r_offset = rel->r_offset
5303 + input_section->output_section->vma
5304 + input_section->output_offset;
5305 if (h != NULL && h->dynindx != -1)
5309 if (r_type == R_386_TLS_LE_32)
5310 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
5312 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
5313 sreloc = elf_section_data (input_section)->sreloc;
5316 elf_append_rel (output_bfd, sreloc, &outrel);
5319 else if (r_type == R_386_TLS_LE_32)
5320 relocation = elf_i386_dtpoff_base (info) - relocation;
5322 relocation -= elf_i386_dtpoff_base (info);
5324 else if (r_type == R_386_TLS_LE_32)
5325 relocation = elf_i386_tpoff (info, relocation);
5327 relocation = -elf_i386_tpoff (info, relocation);
5334 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5335 because such sections are not SEC_ALLOC and thus ld.so will
5336 not process them. */
5337 if (unresolved_reloc
5338 && !((input_section->flags & SEC_DEBUGGING) != 0
5340 && _bfd_elf_section_offset (output_bfd, info, input_section,
5341 rel->r_offset) != (bfd_vma) -1)
5344 /* xgettext:c-format */
5345 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
5350 h->root.root.string);
5355 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5356 contents, rel->r_offset,
5359 check_relocation_error:
5360 if (r != bfd_reloc_ok)
5365 name = h->root.root.string;
5368 name = bfd_elf_string_from_elf_section (input_bfd,
5369 symtab_hdr->sh_link,
5374 name = bfd_section_name (input_bfd, sec);
5377 if (r == bfd_reloc_overflow)
5378 (*info->callbacks->reloc_overflow)
5379 (info, (h ? &h->root : NULL), name, howto->name,
5380 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5384 /* xgettext:c-format */
5385 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
5386 input_bfd, input_section,
5387 rel->r_offset, name, (int) r);
5398 Elf_Internal_Shdr *rel_hdr;
5399 size_t deleted = rel - wrel;
5401 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5402 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5403 if (rel_hdr->sh_size == 0)
5405 /* It is too late to remove an empty reloc section. Leave
5407 ??? What is wrong with an empty section??? */
5408 rel_hdr->sh_size = rel_hdr->sh_entsize;
5411 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5412 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5413 input_section->reloc_count -= deleted;
5419 /* Finish up dynamic symbol handling. We set the contents of various
5420 dynamic sections here. */
5423 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
5424 struct bfd_link_info *info,
5425 struct elf_link_hash_entry *h,
5426 Elf_Internal_Sym *sym)
5428 struct elf_i386_link_hash_table *htab;
5429 unsigned plt_entry_size;
5430 const struct elf_i386_backend_data *abed;
5431 struct elf_i386_link_hash_entry *eh;
5432 bfd_boolean local_undefweak;
5433 bfd_boolean use_plt_second;
5435 htab = elf_i386_hash_table (info);
5439 abed = get_elf_i386_backend_data (output_bfd);
5440 plt_entry_size = htab->plt.plt_entry_size;
5442 /* Use the second PLT section only if there is .plt section. */
5443 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
5445 eh = (struct elf_i386_link_hash_entry *) h;
5446 if (eh->no_finish_dynamic_symbol)
5449 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5450 resolved undefined weak symbols in executable so that their
5451 references have value 0 at run-time. */
5452 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
5456 if (h->plt.offset != (bfd_vma) -1)
5458 bfd_vma plt_index, plt_offset;
5460 Elf_Internal_Rela rel;
5462 asection *plt, *resolved_plt, *gotplt, *relplt;
5464 /* When building a static executable, use .iplt, .igot.plt and
5465 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5466 if (htab->elf.splt != NULL)
5468 plt = htab->elf.splt;
5469 gotplt = htab->elf.sgotplt;
5470 relplt = htab->elf.srelplt;
5474 plt = htab->elf.iplt;
5475 gotplt = htab->elf.igotplt;
5476 relplt = htab->elf.irelplt;
5479 /* This symbol has an entry in the procedure linkage table. Set
5482 if ((h->dynindx == -1
5484 && !((h->forced_local || bfd_link_executable (info))
5486 && h->type == STT_GNU_IFUNC))
5492 /* Get the index in the procedure linkage table which
5493 corresponds to this symbol. This is the index of this symbol
5494 in all the symbols for which we are making plt entries. The
5495 first entry in the procedure linkage table is reserved.
5497 Get the offset into the .got table of the entry that
5498 corresponds to this function. Each .got entry is 4 bytes.
5499 The first three are reserved.
5501 For static executables, we don't reserve anything. */
5503 if (plt == htab->elf.splt)
5505 got_offset = (h->plt.offset / plt_entry_size
5506 - htab->plt.has_plt0);
5507 got_offset = (got_offset + 3) * 4;
5511 got_offset = h->plt.offset / plt_entry_size;
5512 got_offset = got_offset * 4;
5515 /* Fill in the entry in the procedure linkage table and update
5517 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
5522 const bfd_byte *plt_entry;
5523 if (bfd_link_pic (info))
5524 plt_entry = htab->non_lazy_plt->pic_plt_entry;
5526 plt_entry = htab->non_lazy_plt->plt_entry;
5527 memcpy (htab->plt_second->contents + eh->plt_second.offset,
5528 plt_entry, htab->non_lazy_plt->plt_entry_size);
5530 resolved_plt = htab->plt_second;
5531 plt_offset = eh->plt_second.offset;
5536 plt_offset = h->plt.offset;
5539 if (! bfd_link_pic (info))
5541 bfd_put_32 (output_bfd,
5542 (gotplt->output_section->vma
5543 + gotplt->output_offset
5545 resolved_plt->contents + plt_offset
5546 + htab->plt.plt_got_offset);
5548 if (abed->os == is_vxworks)
5550 int s, k, reloc_index;
5552 /* Create the R_386_32 relocation referencing the GOT
5553 for this PLT entry. */
5555 /* S: Current slot number (zero-based). */
5556 s = ((h->plt.offset - htab->plt.plt_entry_size)
5557 / htab->plt.plt_entry_size);
5558 /* K: Number of relocations for PLTResolve. */
5559 if (bfd_link_pic (info))
5560 k = PLTRESOLVE_RELOCS_SHLIB;
5562 k = PLTRESOLVE_RELOCS;
5563 /* Skip the PLTresolve relocations, and the relocations for
5564 the other PLT slots. */
5565 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
5566 loc = (htab->srelplt2->contents + reloc_index
5567 * sizeof (Elf32_External_Rel));
5569 rel.r_offset = (plt->output_section->vma
5570 + plt->output_offset
5571 + h->plt.offset + 2),
5572 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5573 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5575 /* Create the R_386_32 relocation referencing the beginning of
5576 the PLT for this GOT entry. */
5577 rel.r_offset = (htab->elf.sgotplt->output_section->vma
5578 + htab->elf.sgotplt->output_offset
5580 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5581 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5582 loc + sizeof (Elf32_External_Rel));
5587 bfd_put_32 (output_bfd, got_offset,
5588 resolved_plt->contents + plt_offset
5589 + htab->plt.plt_got_offset);
5592 /* Fill in the entry in the global offset table. Leave the entry
5593 as zero for undefined weak symbol in PIE. No PLT relocation
5594 against undefined weak symbol in PIE. */
5595 if (!local_undefweak)
5597 if (htab->plt.has_plt0)
5598 bfd_put_32 (output_bfd,
5599 (plt->output_section->vma
5600 + plt->output_offset
5602 + htab->lazy_plt->plt_lazy_offset),
5603 gotplt->contents + got_offset);
5605 /* Fill in the entry in the .rel.plt section. */
5606 rel.r_offset = (gotplt->output_section->vma
5607 + gotplt->output_offset
5609 if (h->dynindx == -1
5610 || ((bfd_link_executable (info)
5611 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5613 && h->type == STT_GNU_IFUNC))
5615 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5616 h->root.root.string,
5617 h->root.u.def.section->owner);
5619 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5620 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5621 in the .got.plt section. */
5622 bfd_put_32 (output_bfd,
5623 (h->root.u.def.value
5624 + h->root.u.def.section->output_section->vma
5625 + h->root.u.def.section->output_offset),
5626 gotplt->contents + got_offset);
5627 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5628 /* R_386_IRELATIVE comes last. */
5629 plt_index = htab->next_irelative_index--;
5633 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
5634 plt_index = htab->next_jump_slot_index++;
5637 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
5638 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5640 /* Don't fill the second and third slots in PLT entry for
5641 static executables nor without PLT0. */
5642 if (plt == htab->elf.splt && htab->plt.has_plt0)
5644 bfd_put_32 (output_bfd,
5645 plt_index * sizeof (Elf32_External_Rel),
5646 plt->contents + h->plt.offset
5647 + htab->lazy_plt->plt_reloc_offset);
5648 bfd_put_32 (output_bfd,
5650 + htab->lazy_plt->plt_plt_offset + 4),
5651 (plt->contents + h->plt.offset
5652 + htab->lazy_plt->plt_plt_offset));
5656 else if (eh->plt_got.offset != (bfd_vma) -1)
5658 bfd_vma got_offset, plt_offset;
5659 asection *plt, *got, *gotplt;
5660 const bfd_byte *got_plt_entry;
5662 /* Set the entry in the GOT procedure linkage table. */
5663 plt = htab->plt_got;
5664 got = htab->elf.sgot;
5665 gotplt = htab->elf.sgotplt;
5666 got_offset = h->got.offset;
5668 if (got_offset == (bfd_vma) -1
5674 /* Fill in the entry in the GOT procedure linkage table. */
5675 if (! bfd_link_pic (info))
5677 got_plt_entry = htab->non_lazy_plt->plt_entry;
5678 got_offset += got->output_section->vma + got->output_offset;
5682 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
5683 got_offset += (got->output_section->vma
5684 + got->output_offset
5685 - gotplt->output_section->vma
5686 - gotplt->output_offset);
5689 plt_offset = eh->plt_got.offset;
5690 memcpy (plt->contents + plt_offset, got_plt_entry,
5691 htab->non_lazy_plt->plt_entry_size);
5692 bfd_put_32 (output_bfd, got_offset,
5693 (plt->contents + plt_offset
5694 + htab->non_lazy_plt->plt_got_offset));
5697 if (!local_undefweak
5699 && (h->plt.offset != (bfd_vma) -1
5700 || eh->plt_got.offset != (bfd_vma) -1))
5702 /* Mark the symbol as undefined, rather than as defined in
5703 the .plt section. Leave the value if there were any
5704 relocations where pointer equality matters (this is a clue
5705 for the dynamic linker, to make function pointer
5706 comparisons work between an application and shared
5707 library), otherwise set it to zero. If a function is only
5708 called from a binary, there is no need to slow down
5709 shared libraries because of that. */
5710 sym->st_shndx = SHN_UNDEF;
5711 if (!h->pointer_equality_needed)
5715 /* Don't generate dynamic GOT relocation against undefined weak
5716 symbol in executable. */
5717 if (h->got.offset != (bfd_vma) -1
5718 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
5719 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
5720 && !local_undefweak)
5722 Elf_Internal_Rela rel;
5723 asection *relgot = htab->elf.srelgot;
5725 /* This symbol has an entry in the global offset table. Set it
5728 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
5731 rel.r_offset = (htab->elf.sgot->output_section->vma
5732 + htab->elf.sgot->output_offset
5733 + (h->got.offset & ~(bfd_vma) 1));
5735 /* If this is a static link, or it is a -Bsymbolic link and the
5736 symbol is defined locally or was forced to be local because
5737 of a version file, we just want to emit a RELATIVE reloc.
5738 The entry in the global offset table will already have been
5739 initialized in the relocate_section function. */
5741 && h->type == STT_GNU_IFUNC)
5743 if (h->plt.offset == (bfd_vma) -1)
5745 /* STT_GNU_IFUNC is referenced without PLT. */
5746 if (htab->elf.splt == NULL)
5748 /* use .rel[a].iplt section to store .got relocations
5749 in static executable. */
5750 relgot = htab->elf.irelplt;
5752 if (SYMBOL_REFERENCES_LOCAL (info, h))
5754 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5755 h->root.root.string,
5756 h->root.u.def.section->owner);
5758 bfd_put_32 (output_bfd,
5759 (h->root.u.def.value
5760 + h->root.u.def.section->output_section->vma
5761 + h->root.u.def.section->output_offset),
5762 htab->elf.sgot->contents + h->got.offset);
5763 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5768 else if (bfd_link_pic (info))
5770 /* Generate R_386_GLOB_DAT. */
5778 if (!h->pointer_equality_needed)
5781 /* For non-shared object, we can't use .got.plt, which
5782 contains the real function addres if we need pointer
5783 equality. We load the GOT entry with the PLT entry. */
5784 if (htab->plt_second != NULL)
5786 plt = htab->plt_second;
5787 plt_offset = eh->plt_second.offset;
5791 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
5792 plt_offset = h->plt.offset;
5794 bfd_put_32 (output_bfd,
5795 (plt->output_section->vma
5796 + plt->output_offset + plt_offset),
5797 htab->elf.sgot->contents + h->got.offset);
5801 else if (bfd_link_pic (info)
5802 && SYMBOL_REFERENCES_LOCAL (info, h))
5804 BFD_ASSERT((h->got.offset & 1) != 0);
5805 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
5809 BFD_ASSERT((h->got.offset & 1) == 0);
5811 bfd_put_32 (output_bfd, (bfd_vma) 0,
5812 htab->elf.sgot->contents + h->got.offset);
5813 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
5816 elf_append_rel (output_bfd, relgot, &rel);
5821 Elf_Internal_Rela rel;
5824 /* This symbol needs a copy reloc. Set it up. */
5826 if (h->dynindx == -1
5827 || (h->root.type != bfd_link_hash_defined
5828 && h->root.type != bfd_link_hash_defweak)
5829 || htab->elf.srelbss == NULL
5830 || htab->elf.sreldynrelro == NULL)
5833 rel.r_offset = (h->root.u.def.value
5834 + h->root.u.def.section->output_section->vma
5835 + h->root.u.def.section->output_offset);
5836 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
5837 if (h->root.u.def.section == htab->elf.sdynrelro)
5838 s = htab->elf.sreldynrelro;
5840 s = htab->elf.srelbss;
5841 elf_append_rel (output_bfd, s, &rel);
5847 /* Finish up local dynamic symbol handling. We set the contents of
5848 various dynamic sections here. */
5851 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5853 struct elf_link_hash_entry *h
5854 = (struct elf_link_hash_entry *) *slot;
5855 struct bfd_link_info *info
5856 = (struct bfd_link_info *) inf;
5858 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5862 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5863 here since undefined weak symbol may not be dynamic and may not be
5864 called for elf_i386_finish_dynamic_symbol. */
5867 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5870 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5871 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5873 if (h->root.type != bfd_link_hash_undefweak
5874 || h->dynindx != -1)
5877 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5881 /* Used to decide how to sort relocs in an optimal manner for the
5882 dynamic linker, before writing them out. */
5884 static enum elf_reloc_type_class
5885 elf_i386_reloc_type_class (const struct bfd_link_info *info,
5886 const asection *rel_sec ATTRIBUTE_UNUSED,
5887 const Elf_Internal_Rela *rela)
5889 bfd *abfd = info->output_bfd;
5890 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5891 struct elf_link_hash_table *htab = elf_hash_table (info);
5893 if (htab->dynsym != NULL
5894 && htab->dynsym->contents != NULL)
5896 /* Check relocation against STT_GNU_IFUNC symbol if there are
5898 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5899 if (r_symndx != STN_UNDEF)
5901 Elf_Internal_Sym sym;
5902 if (!bed->s->swap_symbol_in (abfd,
5903 (htab->dynsym->contents
5904 + r_symndx * sizeof (Elf32_External_Sym)),
5908 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5909 return reloc_class_ifunc;
5913 switch (ELF32_R_TYPE (rela->r_info))
5915 case R_386_IRELATIVE:
5916 return reloc_class_ifunc;
5917 case R_386_RELATIVE:
5918 return reloc_class_relative;
5919 case R_386_JUMP_SLOT:
5920 return reloc_class_plt;
5922 return reloc_class_copy;
5924 return reloc_class_normal;
5928 /* Finish up the dynamic sections. */
5931 elf_i386_finish_dynamic_sections (bfd *output_bfd,
5932 struct bfd_link_info *info)
5934 struct elf_i386_link_hash_table *htab;
5937 const struct elf_i386_backend_data *abed;
5939 htab = elf_i386_hash_table (info);
5943 dynobj = htab->elf.dynobj;
5944 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5945 abed = get_elf_i386_backend_data (output_bfd);
5947 if (htab->elf.dynamic_sections_created)
5949 Elf32_External_Dyn *dyncon, *dynconend;
5951 if (sdyn == NULL || htab->elf.sgot == NULL)
5954 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5955 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5956 for (; dyncon < dynconend; dyncon++)
5958 Elf_Internal_Dyn dyn;
5961 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5966 if (abed->os == is_vxworks
5967 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5972 s = htab->elf.sgotplt;
5973 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5977 s = htab->elf.srelplt;
5978 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5982 s = htab->elf.srelplt;
5983 dyn.d_un.d_val = s->size;
5987 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5990 if (htab->elf.splt && htab->elf.splt->size > 0)
5992 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5993 really seem like the right value. */
5994 elf_section_data (htab->elf.splt->output_section)
5995 ->this_hdr.sh_entsize = 4;
5997 if (htab->plt.has_plt0)
5999 /* Fill in the special first entry in the procedure linkage
6001 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
6002 htab->lazy_plt->plt0_entry_size);
6003 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
6004 abed->plt0_pad_byte,
6005 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
6006 if (!bfd_link_pic (info))
6008 bfd_put_32 (output_bfd,
6009 (htab->elf.sgotplt->output_section->vma
6010 + htab->elf.sgotplt->output_offset
6012 htab->elf.splt->contents
6013 + htab->lazy_plt->plt0_got1_offset);
6014 bfd_put_32 (output_bfd,
6015 (htab->elf.sgotplt->output_section->vma
6016 + htab->elf.sgotplt->output_offset
6018 htab->elf.splt->contents
6019 + htab->lazy_plt->plt0_got2_offset);
6021 if (abed->os == is_vxworks)
6023 Elf_Internal_Rela rel;
6024 int num_plts = (htab->elf.splt->size
6025 / htab->plt.plt_entry_size) - 1;
6028 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
6029 + 4. On IA32 we use REL relocations so the
6030 addend goes in the PLT directly. */
6031 rel.r_offset = (htab->elf.splt->output_section->vma
6032 + htab->elf.splt->output_offset
6033 + htab->lazy_plt->plt0_got1_offset);
6034 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6036 bfd_elf32_swap_reloc_out (output_bfd, &rel,
6037 htab->srelplt2->contents);
6038 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
6040 rel.r_offset = (htab->elf.splt->output_section->vma
6041 + htab->elf.splt->output_offset
6042 + htab->lazy_plt->plt0_got2_offset);
6043 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6045 bfd_elf32_swap_reloc_out (output_bfd, &rel,
6046 htab->srelplt2->contents +
6047 sizeof (Elf32_External_Rel));
6048 /* Correct the .rel.plt.unloaded relocations. */
6049 p = htab->srelplt2->contents;
6050 if (bfd_link_pic (info))
6051 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
6053 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
6055 for (; num_plts; num_plts--)
6057 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
6058 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
6060 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
6061 p += sizeof (Elf32_External_Rel);
6063 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
6064 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
6066 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
6067 p += sizeof (Elf32_External_Rel);
6074 if (htab->plt_got != NULL && htab->plt_got->size > 0)
6075 elf_section_data (htab->plt_got->output_section)
6076 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
6078 if (htab->plt_second != NULL && htab->plt_second->size > 0)
6079 elf_section_data (htab->plt_second->output_section)
6080 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
6083 /* Fill in the first three entries in the global offset table. */
6084 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
6086 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
6089 (_("discarded output section: `%A'"), htab->elf.sgotplt);
6093 bfd_put_32 (output_bfd,
6095 : sdyn->output_section->vma + sdyn->output_offset),
6096 htab->elf.sgotplt->contents);
6097 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
6098 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
6100 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
6103 /* Adjust .eh_frame for .plt section. */
6104 if (htab->plt_eh_frame != NULL
6105 && htab->plt_eh_frame->contents != NULL)
6107 if (htab->elf.splt != NULL
6108 && htab->elf.splt->size != 0
6109 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
6110 && htab->elf.splt->output_section != NULL
6111 && htab->plt_eh_frame->output_section != NULL)
6113 bfd_vma plt_start = htab->elf.splt->output_section->vma;
6114 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
6115 + htab->plt_eh_frame->output_offset
6116 + PLT_FDE_START_OFFSET;
6117 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6118 htab->plt_eh_frame->contents
6119 + PLT_FDE_START_OFFSET);
6121 if (htab->plt_eh_frame->sec_info_type
6122 == SEC_INFO_TYPE_EH_FRAME)
6124 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6126 htab->plt_eh_frame->contents))
6131 /* Adjust .eh_frame for .plt.got section. */
6132 if (htab->plt_got_eh_frame != NULL
6133 && htab->plt_got_eh_frame->contents != NULL)
6135 if (htab->plt_got != NULL
6136 && htab->plt_got->size != 0
6137 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
6138 && htab->plt_got->output_section != NULL
6139 && htab->plt_got_eh_frame->output_section != NULL)
6141 bfd_vma plt_start = htab->plt_got->output_section->vma;
6142 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
6143 + htab->plt_got_eh_frame->output_offset
6144 + PLT_FDE_START_OFFSET;
6145 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6146 htab->plt_got_eh_frame->contents
6147 + PLT_FDE_START_OFFSET);
6149 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
6151 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6152 htab->plt_got_eh_frame,
6153 htab->plt_got_eh_frame->contents))
6158 /* Adjust .eh_frame for the second PLT section. */
6159 if (htab->plt_second_eh_frame != NULL
6160 && htab->plt_second_eh_frame->contents != NULL)
6162 if (htab->plt_second != NULL
6163 && htab->plt_second->size != 0
6164 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
6165 && htab->plt_second->output_section != NULL
6166 && htab->plt_second_eh_frame->output_section != NULL)
6168 bfd_vma plt_start = htab->plt_second->output_section->vma;
6169 bfd_vma eh_frame_start
6170 = (htab->plt_second_eh_frame->output_section->vma
6171 + htab->plt_second_eh_frame->output_offset
6172 + PLT_FDE_START_OFFSET);
6173 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
6174 htab->plt_second_eh_frame->contents
6175 + PLT_FDE_START_OFFSET);
6177 if (htab->plt_second_eh_frame->sec_info_type
6178 == SEC_INFO_TYPE_EH_FRAME)
6180 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
6181 htab->plt_second_eh_frame,
6182 htab->plt_second_eh_frame->contents))
6187 if (htab->elf.sgot && htab->elf.sgot->size > 0)
6188 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
6190 /* Fill PLT entries for undefined weak symbols in PIE. */
6191 if (bfd_link_pie (info))
6192 bfd_hash_traverse (&info->hash->table,
6193 elf_i386_pie_finish_undefweak_symbol,
6199 /* Fill PLT/GOT entries and allocate dynamic relocations for local
6200 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
6201 It has to be done before elf_link_sort_relocs is called so that
6202 dynamic relocations are properly sorted. */
6205 elf_i386_output_arch_local_syms
6206 (bfd *output_bfd ATTRIBUTE_UNUSED,
6207 struct bfd_link_info *info,
6208 void *flaginfo ATTRIBUTE_UNUSED,
6209 int (*func) (void *, const char *,
6212 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
6214 struct elf_i386_link_hash_table *htab = elf_i386_hash_table (info);
6218 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6219 htab_traverse (htab->loc_hash_table,
6220 elf_i386_finish_local_dynamic_symbol,
6226 /* Sort relocs into address order. */
6229 compare_relocs (const void *ap, const void *bp)
6231 const arelent *a = * (const arelent **) ap;
6232 const arelent *b = * (const arelent **) bp;
6234 if (a->address > b->address)
6236 else if (a->address < b->address)
6242 enum elf_i386_plt_type
6247 plt_second = 1 << 2,
6256 enum elf_i386_plt_type type;
6257 unsigned int plt_got_offset;
6258 unsigned int plt_entry_size;
6262 /* Forward declaration. */
6263 static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt;
6265 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
6266 dynamic relocations. */
6269 elf_i386_get_synthetic_symtab (bfd *abfd,
6270 long symcount ATTRIBUTE_UNUSED,
6271 asymbol **syms ATTRIBUTE_UNUSED,
6276 long size, count, i, n, len;
6278 unsigned int plt_got_offset, plt_entry_size;
6280 bfd_byte *plt_contents;
6281 long dynrelcount, relsize;
6282 arelent **dynrelbuf, *p;
6283 const struct elf_i386_lazy_plt_layout *lazy_plt;
6284 const struct elf_i386_non_lazy_plt_layout *non_lazy_plt;
6285 const struct elf_i386_lazy_plt_layout *lazy_ibt_plt;
6286 const struct elf_i386_non_lazy_plt_layout *non_lazy_ibt_plt;
6290 enum elf_i386_plt_type plt_type;
6291 struct elf_i386_plt plts[] =
6293 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0 },
6294 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0 },
6295 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0 },
6296 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0 }
6301 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
6304 if (dynsymcount <= 0)
6307 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
6311 dynrelbuf = (arelent **) bfd_malloc (relsize);
6312 if (dynrelbuf == NULL)
6315 dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf,
6318 /* Sort the relocs by address. */
6319 qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs);
6321 non_lazy_plt = NULL;
6322 /* Silence GCC 6. */
6324 non_lazy_ibt_plt = NULL;
6325 lazy_ibt_plt = NULL;
6326 switch (get_elf_i386_backend_data (abfd)->os)
6329 non_lazy_plt = &elf_i386_non_lazy_plt;
6330 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
6331 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
6334 lazy_plt = &elf_i386_lazy_plt;
6337 lazy_plt = &elf_i386_nacl_plt;
6344 for (j = 0; plts[j].name != NULL; j++)
6346 plt = bfd_get_section_by_name (abfd, plts[j].name);
6350 /* Get the PLT section contents. */
6351 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
6352 if (plt_contents == NULL)
6354 if (!bfd_get_section_contents (abfd, (asection *) plt,
6355 plt_contents, 0, plt->size))
6357 free (plt_contents);
6361 /* Check what kind of PLT it is. */
6362 plt_type = plt_unknown;
6363 if (plts[j].type == plt_unknown)
6365 /* Match lazy PLT first. */
6366 if (memcmp (plt_contents, lazy_plt->plt0_entry,
6367 lazy_plt->plt0_got1_offset) == 0)
6369 /* The fist entry in the lazy IBT PLT is the same as the
6371 if (lazy_ibt_plt != NULL
6372 && (memcmp (plt_contents + lazy_ibt_plt->plt_entry_size,
6373 lazy_ibt_plt->plt_entry,
6374 lazy_ibt_plt->plt_got_offset) == 0))
6375 plt_type = plt_lazy | plt_second;
6377 plt_type = plt_lazy;
6379 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
6380 lazy_plt->plt0_got1_offset) == 0)
6382 /* The fist entry in the PIC lazy IBT PLT is the same as
6383 the normal PIC lazy PLT. */
6384 if (lazy_ibt_plt != NULL
6385 && (memcmp (plt_contents + lazy_ibt_plt->plt_entry_size,
6386 lazy_ibt_plt->pic_plt_entry,
6387 lazy_ibt_plt->plt_got_offset) == 0))
6388 plt_type = plt_lazy | plt_pic | plt_second;
6390 plt_type = plt_lazy | plt_pic;
6394 if (non_lazy_plt != NULL
6395 && (plt_type == plt_unknown || plt_type == plt_non_lazy))
6397 /* Match non-lazy PLT. */
6398 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
6399 non_lazy_plt->plt_got_offset) == 0)
6400 plt_type = plt_non_lazy;
6401 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
6402 non_lazy_plt->plt_got_offset) == 0)
6406 if ((non_lazy_ibt_plt != NULL)
6407 && (plt_type == plt_unknown || plt_type == plt_second))
6409 if (memcmp (plt_contents,
6410 non_lazy_ibt_plt->plt_entry,
6411 non_lazy_ibt_plt->plt_got_offset) == 0)
6413 /* Match IBT PLT. */
6414 plt_type = plt_second;
6415 non_lazy_plt = non_lazy_ibt_plt;
6417 else if (memcmp (plt_contents,
6418 non_lazy_ibt_plt->pic_plt_entry,
6419 non_lazy_ibt_plt->plt_got_offset) == 0)
6421 /* Match PIC IBT PLT. */
6422 plt_type = plt_second | plt_pic;
6423 non_lazy_plt = non_lazy_ibt_plt;
6427 if (plt_type == plt_unknown)
6431 plts[j].type = plt_type;
6433 if ((plt_type & plt_lazy))
6435 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
6436 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
6437 /* Skip PLT0 in lazy PLT. */
6442 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
6443 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
6447 /* Skip lazy PLT when the second PLT is used. */
6448 if ((plt_type & (plt_lazy | plt_second))
6449 == (plt_lazy | plt_second))
6453 n = plt->size / plts[j].plt_entry_size;
6458 plts[j].contents = plt_contents;
6460 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
6461 if ((plt_type & plt_pic))
6462 got_addr = (bfd_vma) -1;
6465 size = count * sizeof (asymbol);
6467 /* Allocate space for @plt suffixes. */
6469 for (i = 0; i < dynrelcount; i++)
6472 size += strlen ((*p->sym_ptr_ptr)->name) + sizeof ("@plt");
6474 size += sizeof ("+0x") - 1 + 8;
6477 s = *ret = (asymbol *) bfd_zmalloc (size);
6481 for (j = 0; plts[j].name != NULL; j++)
6482 if (plts[j].contents != NULL)
6483 free (plts[j].contents);
6490 /* Check .got.plt and then .got to get the _GLOBAL_OFFSET_TABLE_
6492 asection *sec = bfd_get_section_by_name (abfd, ".got.plt");
6494 got_addr = sec->vma;
6497 sec = bfd_get_section_by_name (abfd, ".got");
6499 got_addr = sec->vma;
6502 if (got_addr == (bfd_vma) -1)
6506 /* Check for each PLT section. */
6507 names = (char *) (s + count);
6510 for (j = 0; plts[j].name != NULL; j++)
6511 if ((plt_contents = plts[j].contents) != NULL)
6516 plt_got_offset = plts[j].plt_got_offset;
6517 plt_entry_size = plts[j].plt_entry_size;
6521 if ((plts[j].type & plt_lazy))
6523 /* Skip PLT0 in lazy PLT. */
6525 offset = plt_entry_size;
6533 /* Check each PLT entry against dynamic relocations. */
6534 for (; k < plts[j].count; k++)
6540 /* Get the GOT offset, a signed 32-bit integer. */
6541 off = H_GET_32 (abfd, (plt_contents + offset
6543 got_vma = got_addr + off;
6545 /* Binary search. */
6549 while ((min + 1) < max)
6553 mid = (min + max) / 2;
6555 if (got_vma > r->address)
6557 else if (got_vma < r->address)
6566 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6567 if (got_vma == p->address
6569 && (p->howto->type == R_386_JUMP_SLOT
6570 || p->howto->type == R_386_GLOB_DAT
6571 || p->howto->type == R_386_IRELATIVE))
6573 *s = **p->sym_ptr_ptr;
6574 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
6575 set. Since we are defining a symbol, ensure one
6577 if ((s->flags & BSF_LOCAL) == 0)
6578 s->flags |= BSF_GLOBAL;
6579 s->flags |= BSF_SYNTHETIC;
6580 /* This is no longer a section symbol. */
6581 s->flags &= ~BSF_SECTION_SYM;
6583 s->the_bfd = plt->owner;
6587 len = strlen ((*p->sym_ptr_ptr)->name);
6588 memcpy (names, (*p->sym_ptr_ptr)->name, len);
6594 memcpy (names, "+0x", sizeof ("+0x") - 1);
6595 names += sizeof ("+0x") - 1;
6596 bfd_sprintf_vma (abfd, buf, p->addend);
6597 for (a = buf; *a == '0'; ++a)
6600 memcpy (names, a, size);
6603 memcpy (names, "@plt", sizeof ("@plt"));
6604 names += sizeof ("@plt");
6608 offset += plt_entry_size;
6612 /* PLT entries with R_386_TLS_DESC relocations are skipped. */
6618 for (j = 0; plts[j].name != NULL; j++)
6619 if (plts[j].contents != NULL)
6620 free (plts[j].contents);
6627 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6630 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
6632 if (h->plt.offset != (bfd_vma) -1
6634 && !h->pointer_equality_needed)
6637 return _bfd_elf_hash_symbol (h);
6640 /* Parse i386 GNU properties. */
6642 static enum elf_property_kind
6643 elf_i386_parse_gnu_properties (bfd *abfd, unsigned int type,
6644 bfd_byte *ptr, unsigned int datasz)
6650 case GNU_PROPERTY_X86_ISA_1_USED:
6651 case GNU_PROPERTY_X86_ISA_1_NEEDED:
6652 case GNU_PROPERTY_X86_FEATURE_1_AND:
6656 ((type == GNU_PROPERTY_X86_ISA_1_USED
6657 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
6658 : (type == GNU_PROPERTY_X86_ISA_1_NEEDED
6659 ? _("error: %B: <corrupt x86 ISA needed size: 0x%x>")
6660 : _("error: %B: <corrupt x86 feature size: 0x%x>"))),
6662 return property_corrupt;
6664 prop = _bfd_elf_get_property (abfd, type, datasz);
6665 /* Combine properties of the same type. */
6666 prop->u.number |= bfd_h_get_32 (abfd, ptr);
6667 prop->pr_kind = property_number;
6671 return property_ignored;
6674 return property_number;
6677 /* Merge i386 GNU property BPROP with APROP. If APROP isn't NULL,
6678 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
6679 should be merged with ABFD. */
6682 elf_i386_merge_gnu_properties (struct bfd_link_info *info,
6683 bfd *abfd ATTRIBUTE_UNUSED,
6684 elf_property *aprop,
6685 elf_property *bprop)
6687 unsigned int number, features;
6688 bfd_boolean updated = FALSE;
6689 unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type;
6693 case GNU_PROPERTY_X86_ISA_1_USED:
6694 case GNU_PROPERTY_X86_ISA_1_NEEDED:
6695 if (aprop != NULL && bprop != NULL)
6697 number = aprop->u.number;
6698 aprop->u.number = number | bprop->u.number;
6699 updated = number != (unsigned int) aprop->u.number;
6703 /* Return TRUE if APROP is NULL to indicate that BPROP should
6704 be added to ABFD. */
6705 updated = aprop == NULL;
6709 case GNU_PROPERTY_X86_FEATURE_1_AND:
6710 /* Only one of APROP and BPROP can be NULL:
6711 1. APROP & BPROP when both APROP and BPROP aren't NULL.
6712 2. If APROP is NULL, remove x86 feature.
6713 3. Otherwise, do nothing.
6715 if (aprop != NULL && bprop != NULL)
6719 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
6721 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
6722 number = aprop->u.number;
6723 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
6724 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
6725 aprop->u.number = (number & bprop->u.number) | features;
6726 updated = number != (unsigned int) aprop->u.number;
6727 /* Remove the property if all feature bits are cleared. */
6728 if (aprop->u.number == 0)
6729 aprop->pr_kind = property_remove;
6735 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
6737 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
6740 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
6741 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
6744 number = aprop->u.number;
6745 aprop->u.number = number | features;
6746 updated = number != (unsigned int) aprop->u.number;
6750 bprop->u.number |= features;
6754 else if (aprop != NULL)
6756 aprop->pr_kind = property_remove;
6763 /* Never should happen. */
6770 /* Set up i386 GNU properties. Return the first relocatable ELF input
6771 with GNU properties if found. Otherwise, return NULL. */
6774 elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
6776 bfd_boolean normal_target;
6777 bfd_boolean lazy_plt;
6778 asection *sec, *pltsec;
6780 bfd_boolean use_ibt_plt;
6781 unsigned int plt_alignment, features;
6782 struct elf_i386_link_hash_table *htab;
6789 features = GNU_PROPERTY_X86_FEATURE_1_IBT;
6791 features |= GNU_PROPERTY_X86_FEATURE_1_SHSTK;
6793 /* Find a normal input file with GNU property note. */
6794 for (pbfd = info->input_bfds;
6796 pbfd = pbfd->link.next)
6797 if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour
6798 && bfd_count_sections (pbfd) != 0)
6802 if (elf_properties (pbfd) != NULL)
6810 /* If features is set, add GNU_PROPERTY_X86_FEATURE_1_IBT and
6811 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
6812 prop = _bfd_elf_get_property (ebfd,
6813 GNU_PROPERTY_X86_FEATURE_1_AND,
6815 prop->u.number |= features;
6816 prop->pr_kind = property_number;
6818 /* Create the GNU property note section if needed. */
6821 sec = bfd_make_section_with_flags (ebfd,
6822 NOTE_GNU_PROPERTY_SECTION_NAME,
6830 info->callbacks->einfo (_("%F: failed to create GNU property section\n"));
6832 if (!bfd_set_section_alignment (ebfd, sec, 2))
6835 info->callbacks->einfo (_("%F%A: failed to align section\n"),
6839 elf_section_type (sec) = SHT_NOTE;
6843 /* Check GNU_PROPERTY_NO_COPY_ON_PROTECTED. */
6844 for (; pbfd != NULL; pbfd = pbfd->link.next)
6845 if (bfd_get_flavour (pbfd) == bfd_target_elf_flavour
6847 & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
6849 elf_property_list *p;
6851 /* The property list is sorted in order of type. */
6852 for (p = elf_properties (pbfd); p != NULL; p = p->next)
6854 if (GNU_PROPERTY_NO_COPY_ON_PROTECTED
6855 == p->property.pr_type)
6857 /* Clear extern_protected_data if
6858 GNU_PROPERTY_NO_COPY_ON_PROTECTED is
6859 set on any input relocatable file. */
6860 info->extern_protected_data = FALSE;
6863 else if (GNU_PROPERTY_NO_COPY_ON_PROTECTED
6864 < p->property.pr_type)
6870 pbfd = _bfd_elf_link_setup_gnu_properties (info);
6872 if (bfd_link_relocatable (info))
6875 htab = elf_i386_hash_table (info);
6879 use_ibt_plt = info->ibtplt || info->ibt;
6880 if (!use_ibt_plt && pbfd != NULL)
6882 /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */
6883 elf_property_list *p;
6885 /* The property list is sorted in order of type. */
6886 for (p = elf_properties (pbfd); p; p = p->next)
6888 if (GNU_PROPERTY_X86_FEATURE_1_AND == p->property.pr_type)
6890 use_ibt_plt = !!(p->property.u.number
6891 & GNU_PROPERTY_X86_FEATURE_1_IBT);
6894 else if (GNU_PROPERTY_X86_FEATURE_1_AND < p->property.pr_type)
6899 dynobj = htab->elf.dynobj;
6901 /* Set htab->elf.dynobj here so that there is no need to check and
6902 set it in check_relocs. */
6907 htab->elf.dynobj = pbfd;
6914 /* Find a normal input file to hold linker created
6916 for (abfd = info->input_bfds;
6918 abfd = abfd->link.next)
6919 if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
6921 & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
6923 htab->elf.dynobj = abfd;
6930 /* Even when lazy binding is disabled by "-z now", the PLT0 entry may
6931 still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
6932 canonical function address. */
6933 htab->plt.has_plt0 = 1;
6934 normal_target = FALSE;
6936 switch (get_elf_i386_backend_data (info->output_bfd)->os)
6941 htab->lazy_plt = &elf_i386_lazy_ibt_plt;
6942 htab->non_lazy_plt = &elf_i386_non_lazy_ibt_plt;
6946 htab->lazy_plt = &elf_i386_lazy_plt;
6947 htab->non_lazy_plt = &elf_i386_non_lazy_plt;
6949 normal_target = TRUE;
6952 htab->lazy_plt = &elf_i386_lazy_plt;
6953 htab->non_lazy_plt = NULL;
6954 if (!elf_vxworks_create_dynamic_sections (dynobj, info,
6956 info->callbacks->einfo (_("%F: failed to create VxWorks dynamic sections\n"));
6959 htab->lazy_plt = &elf_i386_nacl_plt;
6960 htab->non_lazy_plt = NULL;
6964 pltsec = htab->elf.splt;
6966 /* If the non-lazy PLT is available, use it for all PLT entries if
6967 there are no PLT0 or no .plt section. */
6968 if (htab->non_lazy_plt != NULL
6969 && (!htab->plt.has_plt0 || pltsec == NULL))
6972 if (bfd_link_pic (info))
6974 = htab->non_lazy_plt->pic_plt_entry;
6977 = htab->non_lazy_plt->plt_entry;
6978 htab->plt.plt_entry_size
6979 = htab->non_lazy_plt->plt_entry_size;
6980 htab->plt.plt_got_offset
6981 = htab->non_lazy_plt->plt_got_offset;
6982 htab->plt.eh_frame_plt_size
6983 = htab->non_lazy_plt->eh_frame_plt_size;
6984 htab->plt.eh_frame_plt
6985 = htab->non_lazy_plt->eh_frame_plt;
6990 if (bfd_link_pic (info))
6992 htab->plt.plt0_entry
6993 = htab->lazy_plt->pic_plt0_entry;
6995 = htab->lazy_plt->pic_plt_entry;
6999 htab->plt.plt0_entry
7000 = htab->lazy_plt->plt0_entry;
7002 = htab->lazy_plt->plt_entry;
7004 htab->plt.plt_entry_size
7005 = htab->lazy_plt->plt_entry_size;
7006 htab->plt.plt_got_offset
7007 = htab->lazy_plt->plt_got_offset;
7008 htab->plt.eh_frame_plt_size
7009 = htab->lazy_plt->eh_frame_plt_size;
7010 htab->plt.eh_frame_plt
7011 = htab->lazy_plt->eh_frame_plt;
7014 /* Return if there are no normal input files. */
7018 /* Since create_dynamic_sections isn't always called, but GOT
7019 relocations need GOT sections, create them here so that we
7020 don't need to do it in check_relocs. */
7021 if (htab->elf.sgot == NULL
7022 && !_bfd_elf_create_got_section (dynobj, info))
7023 info->callbacks->einfo (_("%F: failed to create GOT sections\n"));
7025 /* Create the ifunc sections here so that check_relocs can be
7027 if (!_bfd_elf_create_ifunc_sections (dynobj, info))
7028 info->callbacks->einfo (_("%F: failed to create ifunc sections\n"));
7030 plt_alignment = bfd_log2 (htab->plt.plt_entry_size);
7034 /* Whe creating executable, set the contents of the .interp
7035 section to the interpreter. */
7036 if (bfd_link_executable (info) && !info->nointerp)
7038 asection *s = bfd_get_linker_section (dynobj, ".interp");
7041 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7042 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7046 /* Don't change PLT section alignment for NaCl since it uses
7047 64-byte PLT entry and sets PLT section alignment to 32
7051 const struct elf_backend_data *bed
7052 = get_elf_backend_data (dynobj);
7053 flagword pltflags = (bed->dynamic_sec_flags
7058 unsigned int non_lazy_plt_alignment
7059 = bfd_log2 (htab->non_lazy_plt->plt_entry_size);
7062 if (!bfd_set_section_alignment (sec->owner, sec,
7064 goto error_alignment;
7066 /* Create the GOT procedure linkage table. */
7067 sec = bfd_make_section_anyway_with_flags (dynobj,
7071 info->callbacks->einfo (_("%F: failed to create GOT PLT section\n"));
7073 if (!bfd_set_section_alignment (dynobj, sec,
7074 non_lazy_plt_alignment))
7075 goto error_alignment;
7077 htab->plt_got = sec;
7085 /* Create the second PLT for Intel IBT support. IBT
7086 PLT is supported only for non-NaCl target and is
7087 is needed only for lazy binding. */
7088 sec = bfd_make_section_anyway_with_flags (dynobj,
7092 info->callbacks->einfo (_("%F: failed to create IBT-enabled PLT section\n"));
7094 if (!bfd_set_section_alignment (dynobj, sec,
7096 goto error_alignment;
7099 htab->plt_second = sec;
7103 if (!info->no_ld_generated_unwind_info)
7105 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
7106 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
7107 | SEC_LINKER_CREATED);
7109 sec = bfd_make_section_anyway_with_flags (dynobj,
7113 info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n"));
7115 if (!bfd_set_section_alignment (dynobj, sec, 2))
7116 goto error_alignment;
7118 htab->plt_eh_frame = sec;
7120 if (htab->plt_got != NULL)
7122 sec = bfd_make_section_anyway_with_flags (dynobj,
7126 info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n"));
7128 if (!bfd_set_section_alignment (dynobj, sec, 2))
7129 goto error_alignment;
7131 htab->plt_got_eh_frame = sec;
7138 /* The .iplt section is used for IFUNC symbols in static
7140 sec = htab->elf.iplt;
7142 && !bfd_set_section_alignment (sec->owner, sec,
7144 goto error_alignment;
7151 elf_i386_link_check_relocs (bfd *abfd, struct bfd_link_info *info)
7153 if (!bfd_link_relocatable (info))
7155 /* Check for ___tls_get_addr reference. */
7156 struct elf_link_hash_entry *h;
7157 h = elf_link_hash_lookup (elf_hash_table (info), "___tls_get_addr",
7158 FALSE, FALSE, FALSE);
7160 ((struct elf_i386_link_hash_entry *) h)->tls_get_addr = 1;
7163 /* Invoke the regular ELF backend linker to do all the work. */
7164 return _bfd_elf_link_check_relocs (abfd, info);
7167 #define TARGET_LITTLE_SYM i386_elf32_vec
7168 #define TARGET_LITTLE_NAME "elf32-i386"
7169 #define ELF_ARCH bfd_arch_i386
7170 #define ELF_TARGET_ID I386_ELF_DATA
7171 #define ELF_MACHINE_CODE EM_386
7172 #define ELF_MAXPAGESIZE 0x1000
7174 #define elf_backend_can_gc_sections 1
7175 #define elf_backend_can_refcount 1
7176 #define elf_backend_want_got_plt 1
7177 #define elf_backend_plt_readonly 1
7178 #define elf_backend_want_plt_sym 0
7179 #define elf_backend_got_header_size 12
7180 #define elf_backend_plt_alignment 4
7181 #define elf_backend_dtrel_excludes_plt 1
7182 #define elf_backend_extern_protected_data 1
7183 #define elf_backend_caches_rawsize 1
7184 #define elf_backend_want_dynrelro 1
7186 /* Support RELA for objdump of prelink objects. */
7187 #define elf_info_to_howto elf_i386_info_to_howto_rel
7188 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
7190 #define bfd_elf32_mkobject elf_i386_mkobject
7192 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
7193 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
7194 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
7195 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
7196 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
7197 #define bfd_elf32_bfd_link_check_relocs elf_i386_link_check_relocs
7199 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
7200 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
7201 #define elf_backend_check_relocs elf_i386_check_relocs
7202 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
7203 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
7204 #define elf_backend_fake_sections elf_i386_fake_sections
7205 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
7206 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
7207 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
7208 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
7209 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
7210 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
7211 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
7212 #define elf_backend_relocate_section elf_i386_relocate_section
7213 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
7214 #define elf_backend_always_size_sections elf_i386_always_size_sections
7215 #define elf_backend_omit_section_dynsym \
7216 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
7217 #define elf_backend_hash_symbol elf_i386_hash_symbol
7218 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
7219 #define elf_backend_parse_gnu_properties elf_i386_parse_gnu_properties
7220 #define elf_backend_merge_gnu_properties elf_i386_merge_gnu_properties
7221 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
7223 #include "elf32-target.h"
7225 /* FreeBSD support. */
7227 #undef TARGET_LITTLE_SYM
7228 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
7229 #undef TARGET_LITTLE_NAME
7230 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
7232 #define ELF_OSABI ELFOSABI_FREEBSD
7234 /* The kernel recognizes executables as valid only if they carry a
7235 "FreeBSD" label in the ELF header. So we put this label on all
7236 executables and (for simplicity) also all other object files. */
7239 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
7241 _bfd_elf_post_process_headers (abfd, info);
7243 #ifdef OLD_FREEBSD_ABI_LABEL
7245 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
7246 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
7247 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
7252 #undef elf_backend_post_process_headers
7253 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
7255 #define elf32_bed elf32_i386_fbsd_bed
7257 #undef elf_backend_add_symbol_hook
7259 #include "elf32-target.h"
7263 #undef TARGET_LITTLE_SYM
7264 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
7265 #undef TARGET_LITTLE_NAME
7266 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
7268 #undef elf_backend_post_process_headers
7270 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
7271 objects won't be recognized. */
7275 #define elf32_bed elf32_i386_sol2_bed
7277 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
7279 #undef elf_backend_static_tls_alignment
7280 #define elf_backend_static_tls_alignment 8
7282 /* The Solaris 2 ABI requires a plt symbol on all platforms.
7284 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
7286 #undef elf_backend_want_plt_sym
7287 #define elf_backend_want_plt_sym 1
7289 #undef elf_backend_strtab_flags
7290 #define elf_backend_strtab_flags SHF_STRINGS
7292 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
7293 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
7294 FALSE otherwise. ISECTION is the best guess matching section from the
7295 input bfd IBFD, but it might be NULL. */
7298 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
7299 bfd *obfd ATTRIBUTE_UNUSED,
7300 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
7301 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
7303 /* PR 19938: FIXME: Need to add code for setting the sh_info
7304 and sh_link fields of Solaris specific section types. */
7307 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
7308 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
7310 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
7312 The following values should be set:
7315 -----------------------------------------------------------------------------
7316 SHT_SUNW_ancillary The section header index of 0
7317 [0x6fffffee] the associated string table.
7319 SHT_SUNW_capinfo The section header index of For a dynamic object, the
7320 [0x6ffffff0] the associated symbol table. section header index of
7322 SHT_SUNW_capchain table,
7325 SHT_SUNW_symsort The section header index of 0
7326 [0x6ffffff1] the associated symbol table.
7328 SHT_SUNW_tlssort The section header index of 0
7329 [0x6ffffff2] the associated symbol table.
7331 SHT_SUNW_LDYNSYM The section header index of One greater than the
7332 [0x6ffffff3] the associated string table. symbol table index of the
7333 This index is the same string last local symbol,
7334 table used by the SHT_DYNSYM STB_LOCAL. Since
7335 section. SHT_SUNW_LDYNSYM only
7336 contains local symbols,
7337 sh_info is equivalent to
7338 the number of symbols in
7341 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
7342 [0x6ffffff5] the section header index of to named strings, the
7343 the associated section header index of
7344 SHT_SUNW_capinfo table, the associated string
7345 otherwise 0. table, otherwise 0.
7347 SHT_SUNW_move The section header index of 0
7348 [0x6ffffffa] the associated symbol table.
7353 SHT_SUNW_syminfo The section header index of The section header index
7354 [0x6ffffffc] the associated symbol table. of the associated
7357 SHT_SUNW_verdef The section header index of The number of version
7358 [0x6ffffffd] the associated string table. definitions within the
7361 SHT_SUNW_verneed The section header index of The number of version
7362 [0x6ffffffe] the associated string table. dependencies within the
7365 SHT_SUNW_versym The section header index of 0
7366 [0x6fffffff] the associated symbol table. */
7369 #undef elf_backend_copy_special_section_fields
7370 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
7372 #include "elf32-target.h"
7374 /* Intel MCU support. */
7377 elf32_iamcu_elf_object_p (bfd *abfd)
7379 /* Set the right machine number for an IAMCU elf32 file. */
7380 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
7384 #undef TARGET_LITTLE_SYM
7385 #define TARGET_LITTLE_SYM iamcu_elf32_vec
7386 #undef TARGET_LITTLE_NAME
7387 #define TARGET_LITTLE_NAME "elf32-iamcu"
7389 #define ELF_ARCH bfd_arch_iamcu
7391 #undef ELF_MACHINE_CODE
7392 #define ELF_MACHINE_CODE EM_IAMCU
7397 #define elf32_bed elf32_iamcu_bed
7399 #undef elf_backend_object_p
7400 #define elf_backend_object_p elf32_iamcu_elf_object_p
7402 #undef elf_backend_static_tls_alignment
7404 #undef elf_backend_want_plt_sym
7405 #define elf_backend_want_plt_sym 0
7407 #undef elf_backend_strtab_flags
7408 #undef elf_backend_copy_special_section_fields
7410 #include "elf32-target.h"
7412 /* Restore defaults. */
7414 #define ELF_ARCH bfd_arch_i386
7415 #undef ELF_MACHINE_CODE
7416 #define ELF_MACHINE_CODE EM_386
7418 /* Native Client support. */
7420 #undef TARGET_LITTLE_SYM
7421 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
7422 #undef TARGET_LITTLE_NAME
7423 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
7425 #define elf32_bed elf32_i386_nacl_bed
7427 #undef ELF_MAXPAGESIZE
7428 #define ELF_MAXPAGESIZE 0x10000
7430 /* Restore defaults. */
7432 #undef elf_backend_want_plt_sym
7433 #define elf_backend_want_plt_sym 0
7434 #undef elf_backend_post_process_headers
7435 #undef elf_backend_static_tls_alignment
7437 /* NaCl uses substantially different PLT entries for the same effects. */
7439 #undef elf_backend_plt_alignment
7440 #define elf_backend_plt_alignment 5
7441 #define NACL_PLT_ENTRY_SIZE 64
7442 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
7444 static const bfd_byte elf_i386_nacl_plt0_entry[] =
7446 0xff, 0x35, /* pushl contents of address */
7447 0, 0, 0, 0, /* replaced with address of .got + 4. */
7448 0x8b, 0x0d, /* movl contents of address, %ecx */
7449 0, 0, 0, 0, /* replaced with address of .got + 8. */
7450 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
7451 0xff, 0xe1 /* jmp *%ecx */
7454 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
7456 0x8b, 0x0d, /* movl contents of address, %ecx */
7457 0, 0, 0, 0, /* replaced with GOT slot address. */
7458 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
7459 0xff, 0xe1, /* jmp *%ecx */
7461 /* Pad to the next 32-byte boundary with nop instructions. */
7463 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7464 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7466 /* Lazy GOT entries point here (32-byte aligned). */
7467 0x68, /* pushl immediate */
7468 0, 0, 0, 0, /* replaced with reloc offset. */
7469 0xe9, /* jmp relative */
7470 0, 0, 0, 0, /* replaced with offset to .plt. */
7472 /* Pad to the next 32-byte boundary with nop instructions. */
7473 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7474 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7478 static const bfd_byte
7479 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
7481 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
7482 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
7483 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
7484 0xff, 0xe1, /* jmp *%ecx */
7486 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
7487 so pad to that size with nop instructions. */
7488 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
7491 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
7493 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
7494 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
7495 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
7496 0xff, 0xe1, /* jmp *%ecx */
7498 /* Pad to the next 32-byte boundary with nop instructions. */
7500 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7501 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7503 /* Lazy GOT entries point here (32-byte aligned). */
7504 0x68, /* pushl immediate */
7505 0, 0, 0, 0, /* replaced with offset into relocation table. */
7506 0xe9, /* jmp relative */
7507 0, 0, 0, 0, /* replaced with offset to start of .plt. */
7509 /* Pad to the next 32-byte boundary with nop instructions. */
7510 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7511 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7515 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
7517 #if (PLT_CIE_LENGTH != 20 \
7518 || PLT_FDE_LENGTH != 36 \
7519 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
7520 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
7521 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
7523 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
7524 0, 0, 0, 0, /* CIE ID */
7525 1, /* CIE version */
7526 'z', 'R', 0, /* Augmentation string */
7527 1, /* Code alignment factor */
7528 0x7c, /* Data alignment factor: -4 */
7529 8, /* Return address column */
7530 1, /* Augmentation size */
7531 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
7532 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
7533 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
7534 DW_CFA_nop, DW_CFA_nop,
7536 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
7537 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
7538 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
7539 0, 0, 0, 0, /* .plt size goes here */
7540 0, /* Augmentation size */
7541 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
7542 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
7543 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
7544 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
7545 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
7546 13, /* Block length */
7547 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
7548 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
7549 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
7550 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
7551 DW_CFA_nop, DW_CFA_nop
7554 static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt =
7556 elf_i386_nacl_plt0_entry, /* plt0_entry */
7557 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
7558 2, /* plt0_got1_offset */
7559 8, /* plt0_got2_offset */
7560 elf_i386_nacl_plt_entry, /* plt_entry */
7561 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
7562 2, /* plt_got_offset */
7563 33, /* plt_reloc_offset */
7564 38, /* plt_plt_offset */
7565 32, /* plt_lazy_offset */
7566 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
7567 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
7568 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
7569 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
7572 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
7574 0x90, /* plt0_pad_byte: nop insn */
7579 elf32_i386_nacl_elf_object_p (bfd *abfd)
7581 /* Set the right machine number for a NaCl i386 ELF32 file. */
7582 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
7586 #undef elf_backend_arch_data
7587 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
7589 #undef elf_backend_object_p
7590 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
7591 #undef elf_backend_modify_segment_map
7592 #define elf_backend_modify_segment_map nacl_modify_segment_map
7593 #undef elf_backend_modify_program_headers
7594 #define elf_backend_modify_program_headers nacl_modify_program_headers
7595 #undef elf_backend_final_write_processing
7596 #define elf_backend_final_write_processing nacl_final_write_processing
7598 #include "elf32-target.h"
7600 /* Restore defaults. */
7601 #undef elf_backend_object_p
7602 #undef elf_backend_modify_segment_map
7603 #undef elf_backend_modify_program_headers
7604 #undef elf_backend_final_write_processing
7606 /* VxWorks support. */
7608 #undef TARGET_LITTLE_SYM
7609 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
7610 #undef TARGET_LITTLE_NAME
7611 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
7613 #undef ELF_MAXPAGESIZE
7614 #define ELF_MAXPAGESIZE 0x1000
7615 #undef elf_backend_plt_alignment
7616 #define elf_backend_plt_alignment 4
7618 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
7620 0x90, /* plt0_pad_byte */
7624 #undef elf_backend_arch_data
7625 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
7627 #undef elf_backend_relocs_compatible
7628 #undef elf_backend_add_symbol_hook
7629 #define elf_backend_add_symbol_hook \
7630 elf_vxworks_add_symbol_hook
7631 #undef elf_backend_link_output_symbol_hook
7632 #define elf_backend_link_output_symbol_hook \
7633 elf_vxworks_link_output_symbol_hook
7634 #undef elf_backend_emit_relocs
7635 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
7636 #undef elf_backend_final_write_processing
7637 #define elf_backend_final_write_processing \
7638 elf_vxworks_final_write_processing
7639 #undef elf_backend_static_tls_alignment
7641 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7643 #undef elf_backend_want_plt_sym
7644 #define elf_backend_want_plt_sym 1
7647 #define elf32_bed elf32_i386_vxworks_bed
7649 #include "elf32-target.h"