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 procedure linkage table. */
546 #define PLT_ENTRY_SIZE 16
548 /* The first entry in an absolute procedure linkage table looks like
549 this. See the SVR4 ABI i386 supplement to see how this works.
550 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
552 static const bfd_byte elf_i386_plt0_entry[12] =
554 0xff, 0x35, /* pushl contents of address */
555 0, 0, 0, 0, /* replaced with address of .got + 4. */
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0 /* replaced with address of .got + 8. */
560 /* Subsequent entries in an absolute procedure linkage table look like
563 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
565 0xff, 0x25, /* jmp indirect */
566 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
567 0x68, /* pushl immediate */
568 0, 0, 0, 0, /* replaced with offset into relocation table. */
569 0xe9, /* jmp relative */
570 0, 0, 0, 0 /* replaced with offset to start of .plt. */
573 /* The first entry in a PIC procedure linkage table look like this.
574 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
576 static const bfd_byte elf_i386_pic_plt0_entry[12] =
578 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
579 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
582 /* Subsequent entries in a PIC procedure linkage table look like this. */
584 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
586 0xff, 0xa3, /* jmp *offset(%ebx) */
587 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
588 0x68, /* pushl immediate */
589 0, 0, 0, 0, /* replaced with offset into relocation table. */
590 0xe9, /* jmp relative */
591 0, 0, 0, 0 /* replaced with offset to start of .plt. */
594 /* Entries in the GOT procedure linkage table look like this. */
596 static const bfd_byte elf_i386_got_plt_entry[8] =
598 0xff, 0x25, /* jmp indirect */
599 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* Entries in the PIC GOT procedure linkage table look like this. */
605 static const bfd_byte elf_i386_pic_got_plt_entry[8] =
607 0xff, 0xa3, /* jmp *offset(%ebx) */
608 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
612 /* .eh_frame covering the .plt section. */
614 static const bfd_byte elf_i386_eh_frame_plt[] =
616 #define PLT_CIE_LENGTH 20
617 #define PLT_FDE_LENGTH 36
618 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
619 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
620 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
621 0, 0, 0, 0, /* CIE ID */
623 'z', 'R', 0, /* Augmentation string */
624 1, /* Code alignment factor */
625 0x7c, /* Data alignment factor */
626 8, /* Return address column */
627 1, /* Augmentation size */
628 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
629 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
630 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
631 DW_CFA_nop, DW_CFA_nop,
633 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
634 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
635 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
636 0, 0, 0, 0, /* .plt size goes here */
637 0, /* Augmentation size */
638 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
639 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
640 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
641 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
642 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
643 11, /* Block length */
644 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
645 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
646 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
647 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
648 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
651 /* .eh_frame covering the .plt.got section. */
653 static const bfd_byte elf_i386_eh_frame_plt_got[] =
655 #define PLT_GOT_FDE_LENGTH 16
656 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
657 0, 0, 0, 0, /* CIE ID */
659 'z', 'R', 0, /* Augmentation string */
660 1, /* Code alignment factor */
661 0x7c, /* Data alignment factor */
662 8, /* Return address column */
663 1, /* Augmentation size */
664 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
665 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
666 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
667 DW_CFA_nop, DW_CFA_nop,
669 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
670 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
671 0, 0, 0, 0, /* the start of .plt.got goes here */
672 0, 0, 0, 0, /* .plt.got size goes here */
673 0, /* Augmentation size */
674 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
677 struct elf_i386_plt_layout
679 /* The first entry in an absolute procedure linkage table looks like this. */
680 const bfd_byte *plt0_entry;
681 unsigned int plt0_entry_size;
683 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
684 unsigned int plt0_got1_offset;
685 unsigned int plt0_got2_offset;
687 /* Later entries in an absolute procedure linkage table look like this. */
688 const bfd_byte *plt_entry;
689 unsigned int plt_entry_size;
691 /* Offsets into plt_entry that are to be replaced with... */
692 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
693 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
694 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
696 /* Offset into plt_entry where the initial value of the GOT entry points. */
697 unsigned int plt_lazy_offset;
699 /* The first entry in a PIC procedure linkage table looks like this. */
700 const bfd_byte *pic_plt0_entry;
702 /* Subsequent entries in a PIC procedure linkage table look like this. */
703 const bfd_byte *pic_plt_entry;
705 /* .eh_frame covering the .plt section. */
706 const bfd_byte *eh_frame_plt;
707 unsigned int eh_frame_plt_size;
709 /* .eh_frame covering the .plt.got section. */
710 const bfd_byte *eh_frame_plt_got;
711 unsigned int eh_frame_plt_got_size;
714 #define GET_PLT_ENTRY_SIZE(abfd) \
715 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
717 /* These are the standard parameters. */
718 static const struct elf_i386_plt_layout elf_i386_plt =
720 elf_i386_plt0_entry, /* plt0_entry */
721 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
722 2, /* plt0_got1_offset */
723 8, /* plt0_got2_offset */
724 elf_i386_plt_entry, /* plt_entry */
725 PLT_ENTRY_SIZE, /* plt_entry_size */
726 2, /* plt_got_offset */
727 7, /* plt_reloc_offset */
728 12, /* plt_plt_offset */
729 6, /* plt_lazy_offset */
730 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
731 elf_i386_pic_plt_entry, /* pic_plt_entry */
732 elf_i386_eh_frame_plt, /* eh_frame_plt */
733 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
734 elf_i386_eh_frame_plt_got, /* eh_frame_plt_got */
735 sizeof (elf_i386_eh_frame_plt_got), /* eh_frame_plt_got_size */
739 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
740 for the PLTResolve stub and then for each PLT entry. */
741 #define PLTRESOLVE_RELOCS_SHLIB 0
742 #define PLTRESOLVE_RELOCS 2
743 #define PLT_NON_JUMP_SLOT_RELOCS 2
745 /* Architecture-specific backend data for i386. */
747 struct elf_i386_backend_data
749 /* Parameters describing PLT generation. */
750 const struct elf_i386_plt_layout *plt;
752 /* Value used to fill the unused bytes of the first PLT entry. */
753 bfd_byte plt0_pad_byte;
755 /* True if the target system is VxWorks. */
759 #define get_elf_i386_backend_data(abfd) \
760 ((const struct elf_i386_backend_data *) \
761 get_elf_backend_data (abfd)->arch_data)
763 /* These are the standard parameters. */
764 static const struct elf_i386_backend_data elf_i386_arch_bed =
766 &elf_i386_plt, /* plt */
767 0, /* plt0_pad_byte */
771 #define elf_backend_arch_data &elf_i386_arch_bed
773 /* Is a undefined weak symbol which is resolved to 0. Reference to an
774 undefined weak symbol is resolved to 0 when building executable if
776 1. Has non-GOT/non-PLT relocations in text section. Or
777 2. Has no GOT/PLT relocation.
779 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
780 ((EH)->elf.root.type == bfd_link_hash_undefweak \
781 && bfd_link_executable (INFO) \
782 && (elf_i386_hash_table (INFO)->interp == NULL \
784 || (EH)->has_non_got_reloc \
785 || !(INFO)->dynamic_undefined_weak))
787 /* i386 ELF linker hash entry. */
789 struct elf_i386_link_hash_entry
791 struct elf_link_hash_entry elf;
793 /* Track dynamic relocs copied for this symbol. */
794 struct elf_dyn_relocs *dyn_relocs;
796 #define GOT_UNKNOWN 0
800 #define GOT_TLS_IE_POS 5
801 #define GOT_TLS_IE_NEG 6
802 #define GOT_TLS_IE_BOTH 7
803 #define GOT_TLS_GDESC 8
804 #define GOT_TLS_GD_BOTH_P(type) \
805 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
806 #define GOT_TLS_GD_P(type) \
807 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
808 #define GOT_TLS_GDESC_P(type) \
809 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
810 #define GOT_TLS_GD_ANY_P(type) \
811 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
812 unsigned char tls_type;
814 /* Symbol is referenced by R_386_GOTOFF relocation. */
815 unsigned int gotoff_ref : 1;
817 /* Symbol has GOT or PLT relocations. */
818 unsigned int has_got_reloc : 1;
820 /* Symbol has non-GOT/non-PLT relocations in text sections. */
821 unsigned int has_non_got_reloc : 1;
823 /* 0: symbol isn't ___tls_get_addr.
824 1: symbol is ___tls_get_addr.
825 2: symbol is unknown. */
826 unsigned int tls_get_addr : 2;
828 /* Reference count of C/C++ function pointer relocations in read-write
829 section which can be resolved at run-time. */
830 bfd_signed_vma func_pointer_refcount;
832 /* Information about the GOT PLT entry. Filled when there are both
833 GOT and PLT relocations against the same function. */
834 union gotplt_union plt_got;
836 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
837 starting at the end of the jump table. */
841 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
843 struct elf_i386_obj_tdata
845 struct elf_obj_tdata root;
847 /* tls_type for each local got entry. */
848 char *local_got_tls_type;
850 /* GOTPLT entries for TLS descriptors. */
851 bfd_vma *local_tlsdesc_gotent;
854 #define elf_i386_tdata(abfd) \
855 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
857 #define elf_i386_local_got_tls_type(abfd) \
858 (elf_i386_tdata (abfd)->local_got_tls_type)
860 #define elf_i386_local_tlsdesc_gotent(abfd) \
861 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
863 #define is_i386_elf(bfd) \
864 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
865 && elf_tdata (bfd) != NULL \
866 && elf_object_id (bfd) == I386_ELF_DATA)
869 elf_i386_mkobject (bfd *abfd)
871 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
875 /* i386 ELF linker hash table. */
877 struct elf_i386_link_hash_table
879 struct elf_link_hash_table elf;
881 /* Short-cuts to get to dynamic linker sections. */
883 asection *plt_eh_frame;
885 asection *plt_got_eh_frame;
889 bfd_signed_vma refcount;
893 /* The amount of space used by the reserved portion of the sgotplt
894 section, plus whatever space is used by the jump slots. */
895 bfd_vma sgotplt_jump_table_size;
897 /* Small local sym cache. */
898 struct sym_cache sym_cache;
900 /* _TLS_MODULE_BASE_ symbol. */
901 struct bfd_link_hash_entry *tls_module_base;
903 /* Used by local STT_GNU_IFUNC symbols. */
904 htab_t loc_hash_table;
905 void * loc_hash_memory;
907 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
910 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
911 bfd_vma next_tls_desc_index;
913 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
914 bfd_vma next_jump_slot_index;
916 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
917 bfd_vma next_irelative_index;
919 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
920 to read-only sections. */
921 bfd_boolean readonly_dynrelocs_against_ifunc;
924 /* Get the i386 ELF linker hash table from a link_info structure. */
926 #define elf_i386_hash_table(p) \
927 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
928 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
930 #define elf_i386_compute_jump_table_size(htab) \
931 ((htab)->elf.srelplt->reloc_count * 4)
933 /* Create an entry in an i386 ELF linker hash table. */
935 static struct bfd_hash_entry *
936 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
937 struct bfd_hash_table *table,
940 /* Allocate the structure if it has not already been allocated by a
944 entry = (struct bfd_hash_entry *)
945 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
950 /* Call the allocation method of the superclass. */
951 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
954 struct elf_i386_link_hash_entry *eh;
956 eh = (struct elf_i386_link_hash_entry *) entry;
957 eh->dyn_relocs = NULL;
958 eh->tls_type = GOT_UNKNOWN;
960 eh->has_got_reloc = 0;
961 eh->has_non_got_reloc = 0;
962 eh->tls_get_addr = 2;
963 eh->func_pointer_refcount = 0;
964 eh->plt_got.offset = (bfd_vma) -1;
965 eh->tlsdesc_got = (bfd_vma) -1;
971 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
972 for local symbol so that we can handle local STT_GNU_IFUNC symbols
973 as global symbol. We reuse indx and dynstr_index for local symbol
974 hash since they aren't used by global symbols in this backend. */
977 elf_i386_local_htab_hash (const void *ptr)
979 struct elf_link_hash_entry *h
980 = (struct elf_link_hash_entry *) ptr;
981 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
984 /* Compare local hash entries. */
987 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
989 struct elf_link_hash_entry *h1
990 = (struct elf_link_hash_entry *) ptr1;
991 struct elf_link_hash_entry *h2
992 = (struct elf_link_hash_entry *) ptr2;
994 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
997 /* Find and/or create a hash entry for local symbol. */
999 static struct elf_link_hash_entry *
1000 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
1001 bfd *abfd, const Elf_Internal_Rela *rel,
1004 struct elf_i386_link_hash_entry e, *ret;
1005 asection *sec = abfd->sections;
1006 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
1007 ELF32_R_SYM (rel->r_info));
1010 e.elf.indx = sec->id;
1011 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
1012 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
1013 create ? INSERT : NO_INSERT);
1020 ret = (struct elf_i386_link_hash_entry *) *slot;
1024 ret = (struct elf_i386_link_hash_entry *)
1025 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
1026 sizeof (struct elf_i386_link_hash_entry));
1029 memset (ret, 0, sizeof (*ret));
1030 ret->elf.indx = sec->id;
1031 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
1032 ret->elf.dynindx = -1;
1033 ret->func_pointer_refcount = 0;
1034 ret->plt_got.offset = (bfd_vma) -1;
1040 /* Destroy an i386 ELF linker hash table. */
1043 elf_i386_link_hash_table_free (bfd *obfd)
1045 struct elf_i386_link_hash_table *htab
1046 = (struct elf_i386_link_hash_table *) obfd->link.hash;
1048 if (htab->loc_hash_table)
1049 htab_delete (htab->loc_hash_table);
1050 if (htab->loc_hash_memory)
1051 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1052 _bfd_elf_link_hash_table_free (obfd);
1055 /* Create an i386 ELF linker hash table. */
1057 static struct bfd_link_hash_table *
1058 elf_i386_link_hash_table_create (bfd *abfd)
1060 struct elf_i386_link_hash_table *ret;
1061 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
1063 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
1067 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1068 elf_i386_link_hash_newfunc,
1069 sizeof (struct elf_i386_link_hash_entry),
1076 ret->loc_hash_table = htab_try_create (1024,
1077 elf_i386_local_htab_hash,
1078 elf_i386_local_htab_eq,
1080 ret->loc_hash_memory = objalloc_create ();
1081 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1083 elf_i386_link_hash_table_free (abfd);
1086 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1088 return &ret->elf.root;
1091 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1092 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1096 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1098 struct elf_i386_link_hash_table *htab;
1100 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1103 htab = elf_i386_hash_table (info);
1107 /* Set the contents of the .interp section to the interpreter. */
1108 if (bfd_link_executable (info) && !info->nointerp)
1110 asection *s = bfd_get_linker_section (dynobj, ".interp");
1113 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1114 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1118 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1119 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1123 if (!info->no_ld_generated_unwind_info
1124 && htab->plt_eh_frame == NULL
1125 && htab->elf.splt != NULL)
1127 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1128 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1129 | SEC_LINKER_CREATED);
1131 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1132 if (htab->plt_eh_frame == NULL
1133 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1140 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1143 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1144 struct elf_link_hash_entry *dir,
1145 struct elf_link_hash_entry *ind)
1147 struct elf_i386_link_hash_entry *edir, *eind;
1149 edir = (struct elf_i386_link_hash_entry *) dir;
1150 eind = (struct elf_i386_link_hash_entry *) ind;
1152 if (eind->dyn_relocs != NULL)
1154 if (edir->dyn_relocs != NULL)
1156 struct elf_dyn_relocs **pp;
1157 struct elf_dyn_relocs *p;
1159 /* Add reloc counts against the indirect sym to the direct sym
1160 list. Merge any entries against the same section. */
1161 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1163 struct elf_dyn_relocs *q;
1165 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1166 if (q->sec == p->sec)
1168 q->pc_count += p->pc_count;
1169 q->count += p->count;
1176 *pp = edir->dyn_relocs;
1179 edir->dyn_relocs = eind->dyn_relocs;
1180 eind->dyn_relocs = NULL;
1183 if (ind->root.type == bfd_link_hash_indirect
1184 && dir->got.refcount <= 0)
1186 edir->tls_type = eind->tls_type;
1187 eind->tls_type = GOT_UNKNOWN;
1190 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1191 generate a R_386_COPY reloc. */
1192 edir->gotoff_ref |= eind->gotoff_ref;
1194 edir->has_got_reloc |= eind->has_got_reloc;
1195 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1197 if (ELIMINATE_COPY_RELOCS
1198 && ind->root.type != bfd_link_hash_indirect
1199 && dir->dynamic_adjusted)
1201 /* If called to transfer flags for a weakdef during processing
1202 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1203 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1204 if (dir->versioned != versioned_hidden)
1205 dir->ref_dynamic |= ind->ref_dynamic;
1206 dir->ref_regular |= ind->ref_regular;
1207 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1208 dir->needs_plt |= ind->needs_plt;
1209 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1213 if (eind->func_pointer_refcount > 0)
1215 edir->func_pointer_refcount += eind->func_pointer_refcount;
1216 eind->func_pointer_refcount = 0;
1219 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1223 /* Return TRUE if the TLS access code sequence support transition
1227 elf_i386_check_tls_transition (asection *sec,
1229 Elf_Internal_Shdr *symtab_hdr,
1230 struct elf_link_hash_entry **sym_hashes,
1231 unsigned int r_type,
1232 const Elf_Internal_Rela *rel,
1233 const Elf_Internal_Rela *relend)
1235 unsigned int val, type, reg;
1236 unsigned long r_symndx;
1237 struct elf_link_hash_entry *h;
1240 bfd_boolean indirect_call, tls_get_addr;
1242 offset = rel->r_offset;
1247 if (offset < 2 || (rel + 1) >= relend)
1250 indirect_call = FALSE;
1251 call = contents + offset + 4;
1254 if (r_type == R_386_TLS_GD)
1256 /* Check transition from GD access model. Only
1257 leal foo@tlsgd(,%ebx,1), %eax
1258 call ___tls_get_addr@PLT
1260 leal foo@tlsgd(%ebx) %eax
1261 call ___tls_get_addr@PLT
1264 leal foo@tlsgd(%reg), %eax
1265 call *___tls_get_addr@GOT(%reg)
1266 which may be converted to
1267 addr32 call ___tls_get_addr
1268 can transit to different access model. */
1269 if ((offset + 10) > sec->size
1270 || (type != 0x8d && type != 0x04))
1275 /* leal foo@tlsgd(,%ebx,1), %eax
1276 call ___tls_get_addr@PLT */
1280 if (*(call - 7) != 0x8d
1288 leal foo@tlsgd(%ebx), %eax
1289 call ___tls_get_addr@PLT
1292 leal foo@tlsgd(%reg), %eax
1293 call *___tls_get_addr@GOT(%reg)
1294 which may be converted to
1295 addr32 call ___tls_get_addr
1297 %eax can't be used as the GOT base register since it
1298 is used to pass parameter to ___tls_get_addr. */
1300 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
1303 indirect_call = call[0] == 0xff;
1304 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
1305 && !(call[0] == 0x67 && call[1] == 0xe8)
1307 && (call[1] & 0xf8) == 0x90
1308 && (call[1] & 0x7) == reg))
1314 /* Check transition from LD access model. Only
1315 leal foo@tlsldm(%ebx), %eax
1316 call ___tls_get_addr@PLT
1318 leal foo@tlsldm(%reg), %eax
1319 call *___tls_get_addr@GOT(%reg)
1320 which may be converted to
1321 addr32 call ___tls_get_addr
1322 can transit to different access model. */
1323 if (type != 0x8d || (offset + 9) > sec->size)
1326 /* %eax can't be used as the GOT base register since it is
1327 used to pass parameter to ___tls_get_addr. */
1329 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
1332 indirect_call = call[0] == 0xff;
1333 if (!(reg == 3 && call[0] == 0xe8)
1334 && !(call[0] == 0x67 && call[1] == 0xe8)
1336 && (call[1] & 0xf8) == 0x90
1337 && (call[1] & 0x7) == reg))
1341 r_symndx = ELF32_R_SYM (rel[1].r_info);
1342 if (r_symndx < symtab_hdr->sh_info)
1345 tls_get_addr = FALSE;
1346 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1347 if (h != NULL && h->root.root.string != NULL)
1349 struct elf_i386_link_hash_entry *eh
1350 = (struct elf_i386_link_hash_entry *) h;
1351 tls_get_addr = eh->tls_get_addr == 1;
1352 if (eh->tls_get_addr > 1)
1354 /* Use strncmp to check ___tls_get_addr since
1355 ___tls_get_addr may be versioned. */
1356 if (strncmp (h->root.root.string, "___tls_get_addr", 15)
1359 eh->tls_get_addr = 1;
1360 tls_get_addr = TRUE;
1363 eh->tls_get_addr = 0;
1369 else if (indirect_call)
1370 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
1372 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1373 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
1376 /* Check transition from IE access model:
1377 movl foo@indntpoff(%rip), %eax
1378 movl foo@indntpoff(%rip), %reg
1379 addl foo@indntpoff(%rip), %reg
1382 if (offset < 1 || (offset + 4) > sec->size)
1385 /* Check "movl foo@tpoff(%rip), %eax" first. */
1386 val = bfd_get_8 (abfd, contents + offset - 1);
1393 /* Check movl|addl foo@tpoff(%rip), %reg. */
1394 type = bfd_get_8 (abfd, contents + offset - 2);
1395 return ((type == 0x8b || type == 0x03)
1396 && (val & 0xc7) == 0x05);
1398 case R_386_TLS_GOTIE:
1399 case R_386_TLS_IE_32:
1400 /* Check transition from {IE_32,GOTIE} access model:
1401 subl foo@{tpoff,gontoff}(%reg1), %reg2
1402 movl foo@{tpoff,gontoff}(%reg1), %reg2
1403 addl foo@{tpoff,gontoff}(%reg1), %reg2
1406 if (offset < 2 || (offset + 4) > sec->size)
1409 val = bfd_get_8 (abfd, contents + offset - 1);
1410 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1413 type = bfd_get_8 (abfd, contents + offset - 2);
1414 return type == 0x8b || type == 0x2b || type == 0x03;
1416 case R_386_TLS_GOTDESC:
1417 /* Check transition from GDesc access model:
1418 leal x@tlsdesc(%ebx), %eax
1420 Make sure it's a leal adding ebx to a 32-bit offset
1421 into any register, although it's probably almost always
1424 if (offset < 2 || (offset + 4) > sec->size)
1427 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1430 val = bfd_get_8 (abfd, contents + offset - 1);
1431 return (val & 0xc7) == 0x83;
1433 case R_386_TLS_DESC_CALL:
1434 /* Check transition from GDesc access model:
1435 call *x@tlsdesc(%eax)
1437 if (offset + 2 <= sec->size)
1439 /* Make sure that it's a call *x@tlsdesc(%eax). */
1440 call = contents + offset;
1441 return call[0] == 0xff && call[1] == 0x10;
1451 /* Return TRUE if the TLS access transition is OK or no transition
1452 will be performed. Update R_TYPE if there is a transition. */
1455 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1456 asection *sec, bfd_byte *contents,
1457 Elf_Internal_Shdr *symtab_hdr,
1458 struct elf_link_hash_entry **sym_hashes,
1459 unsigned int *r_type, int tls_type,
1460 const Elf_Internal_Rela *rel,
1461 const Elf_Internal_Rela *relend,
1462 struct elf_link_hash_entry *h,
1463 unsigned long r_symndx,
1464 bfd_boolean from_relocate_section)
1466 unsigned int from_type = *r_type;
1467 unsigned int to_type = from_type;
1468 bfd_boolean check = TRUE;
1470 /* Skip TLS transition for functions. */
1472 && (h->type == STT_FUNC
1473 || h->type == STT_GNU_IFUNC))
1479 case R_386_TLS_GOTDESC:
1480 case R_386_TLS_DESC_CALL:
1481 case R_386_TLS_IE_32:
1483 case R_386_TLS_GOTIE:
1484 if (bfd_link_executable (info))
1487 to_type = R_386_TLS_LE_32;
1488 else if (from_type != R_386_TLS_IE
1489 && from_type != R_386_TLS_GOTIE)
1490 to_type = R_386_TLS_IE_32;
1493 /* When we are called from elf_i386_relocate_section, there may
1494 be additional transitions based on TLS_TYPE. */
1495 if (from_relocate_section)
1497 unsigned int new_to_type = to_type;
1499 if (bfd_link_executable (info)
1502 && (tls_type & GOT_TLS_IE))
1503 new_to_type = R_386_TLS_LE_32;
1505 if (to_type == R_386_TLS_GD
1506 || to_type == R_386_TLS_GOTDESC
1507 || to_type == R_386_TLS_DESC_CALL)
1509 if (tls_type == GOT_TLS_IE_POS)
1510 new_to_type = R_386_TLS_GOTIE;
1511 else if (tls_type & GOT_TLS_IE)
1512 new_to_type = R_386_TLS_IE_32;
1515 /* We checked the transition before when we were called from
1516 elf_i386_check_relocs. We only want to check the new
1517 transition which hasn't been checked before. */
1518 check = new_to_type != to_type && from_type == to_type;
1519 to_type = new_to_type;
1525 if (bfd_link_executable (info))
1526 to_type = R_386_TLS_LE_32;
1533 /* Return TRUE if there is no transition. */
1534 if (from_type == to_type)
1537 /* Check if the transition can be performed. */
1539 && ! elf_i386_check_tls_transition (sec, contents,
1540 symtab_hdr, sym_hashes,
1541 from_type, rel, relend))
1543 reloc_howto_type *from, *to;
1546 from = elf_i386_rtype_to_howto (abfd, from_type);
1547 to = elf_i386_rtype_to_howto (abfd, to_type);
1550 name = h->root.root.string;
1553 struct elf_i386_link_hash_table *htab;
1555 htab = elf_i386_hash_table (info);
1560 Elf_Internal_Sym *isym;
1562 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1564 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1569 /* xgettext:c-format */
1570 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1571 "in section `%A' failed"),
1572 abfd, sec, from->name, to->name, name,
1573 (unsigned long) rel->r_offset);
1574 bfd_set_error (bfd_error_bad_value);
1582 /* With the local symbol, foo, we convert
1583 mov foo@GOT[(%reg1)], %reg2
1585 lea foo[@GOTOFF(%reg1)], %reg2
1587 call/jmp *foo@GOT[(%reg)]
1589 nop call foo/jmp foo nop
1590 When PIC is false, convert
1591 test %reg1, foo@GOT[(%reg2)]
1595 binop foo@GOT[(%reg1)], %reg2
1598 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1603 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1605 Elf_Internal_Rela *irel,
1606 struct elf_link_hash_entry *h,
1607 bfd_boolean *converted,
1608 struct bfd_link_info *link_info)
1610 struct elf_i386_link_hash_table *htab;
1611 unsigned int opcode;
1613 bfd_boolean baseless;
1614 Elf_Internal_Sym *isym;
1615 unsigned int addend;
1619 bfd_boolean to_reloc_32;
1620 unsigned int r_type;
1621 unsigned int r_symndx;
1622 bfd_vma roff = irel->r_offset;
1627 /* Addend for R_386_GOT32X relocations must be 0. */
1628 addend = bfd_get_32 (abfd, contents + roff);
1632 htab = elf_i386_hash_table (link_info);
1633 is_pic = bfd_link_pic (link_info);
1635 r_type = ELF32_R_TYPE (irel->r_info);
1636 r_symndx = ELF32_R_SYM (irel->r_info);
1638 modrm = bfd_get_8 (abfd, contents + roff - 1);
1639 baseless = (modrm & 0xc7) == 0x5;
1641 if (baseless && is_pic)
1643 /* For PIC, disallow R_386_GOT32X without a base register
1644 since we don't know what the GOT base is. */
1649 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1651 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1654 name = h->root.root.string;
1657 /* xgettext:c-format */
1658 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"),
1663 opcode = bfd_get_8 (abfd, contents + roff - 2);
1665 /* Convert to R_386_32 if PIC is false or there is no base
1667 to_reloc_32 = !is_pic || baseless;
1669 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1673 if (opcode == 0x0ff)
1674 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1675 goto convert_branch;
1677 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1678 "test %reg1, foo@GOT(%reg2)" and
1679 "binop foo@GOT[(%reg1)], %reg2". */
1683 /* Undefined weak symbol is only bound locally in executable
1684 and its reference is resolved as 0. */
1685 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE,
1686 elf_i386_hash_entry (h)))
1690 /* No direct branch to 0 for PIC. */
1694 goto convert_branch;
1698 /* We can convert load of address 0 to R_386_32. */
1706 /* We have "call/jmp *foo@GOT[(%reg)]". */
1707 if ((h->root.type == bfd_link_hash_defined
1708 || h->root.type == bfd_link_hash_defweak)
1709 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1711 /* The function is locally defined. */
1713 /* Convert R_386_GOT32X to R_386_PC32. */
1714 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1716 struct elf_i386_link_hash_entry *eh
1717 = (struct elf_i386_link_hash_entry *) h;
1719 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1722 /* To support TLS optimization, always use addr32 prefix
1723 for "call *___tls_get_addr@GOT(%reg)". */
1724 if (eh && eh->tls_get_addr == 1)
1727 nop_offset = irel->r_offset - 2;
1731 nop = link_info->call_nop_byte;
1732 if (link_info->call_nop_as_suffix)
1734 nop_offset = roff + 3;
1735 irel->r_offset -= 1;
1738 nop_offset = roff - 2;
1743 /* Convert to "jmp foo nop". */
1746 nop_offset = roff + 3;
1747 irel->r_offset -= 1;
1750 bfd_put_8 (abfd, nop, contents + nop_offset);
1751 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1752 /* When converting to PC-relative relocation, we
1753 need to adjust addend by -4. */
1754 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1755 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1762 /* We have "mov foo@GOT[(%re1g)], %reg2",
1763 "test %reg1, foo@GOT(%reg2)" and
1764 "binop foo@GOT[(%reg1)], %reg2".
1766 Avoid optimizing _DYNAMIC since ld.so may use its
1767 link-time address. */
1768 if (h == htab->elf.hdynamic)
1771 /* def_regular is set by an assignment in a linker script in
1772 bfd_elf_record_link_assignment. */
1774 || h->root.type == bfd_link_hash_defined
1775 || h->root.type == bfd_link_hash_defweak)
1776 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1783 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1784 "mov $foo, %reg2" with R_386_32. */
1786 modrm = 0xc0 | (modrm & 0x38) >> 3;
1787 bfd_put_8 (abfd, modrm, contents + roff - 1);
1792 /* Convert "mov foo@GOT(%reg1), %reg2" to
1793 "lea foo@GOTOFF(%reg1), %reg2". */
1794 r_type = R_386_GOTOFF;
1800 /* Only R_386_32 is supported. */
1806 /* Convert "test %reg1, foo@GOT(%reg2)" to
1807 "test $foo, %reg1". */
1808 modrm = 0xc0 | (modrm & 0x38) >> 3;
1813 /* Convert "binop foo@GOT(%reg1), %reg2" to
1814 "binop $foo, %reg2". */
1816 | (modrm & 0x38) >> 3
1820 bfd_put_8 (abfd, modrm, contents + roff - 1);
1824 bfd_put_8 (abfd, opcode, contents + roff - 2);
1825 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1834 /* Rename some of the generic section flags to better document how they
1836 #define need_convert_load sec_flg0
1837 #define check_relocs_failed sec_flg1
1839 /* Look through the relocs for a section during the first phase, and
1840 calculate needed space in the global offset table, procedure linkage
1841 table, and dynamic reloc sections. */
1844 elf_i386_check_relocs (bfd *abfd,
1845 struct bfd_link_info *info,
1847 const Elf_Internal_Rela *relocs)
1849 struct elf_i386_link_hash_table *htab;
1850 Elf_Internal_Shdr *symtab_hdr;
1851 struct elf_link_hash_entry **sym_hashes;
1852 const Elf_Internal_Rela *rel;
1853 const Elf_Internal_Rela *rel_end;
1856 bfd_boolean use_plt_got;
1858 if (bfd_link_relocatable (info))
1861 /* Don't do anything special with non-loaded, non-alloced sections.
1862 In particular, any relocs in such sections should not affect GOT
1863 and PLT reference counting (ie. we don't allow them to create GOT
1864 or PLT entries), there's no possibility or desire to optimize TLS
1865 relocs, and there's not much point in propagating relocs to shared
1866 libs that the dynamic linker won't relocate. */
1867 if ((sec->flags & SEC_ALLOC) == 0)
1870 BFD_ASSERT (is_i386_elf (abfd));
1872 htab = elf_i386_hash_table (info);
1875 sec->check_relocs_failed = 1;
1879 /* Get the section contents. */
1880 if (elf_section_data (sec)->this_hdr.contents != NULL)
1881 contents = elf_section_data (sec)->this_hdr.contents;
1882 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1884 sec->check_relocs_failed = 1;
1888 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1889 && (get_elf_i386_backend_data (abfd)
1890 == &elf_i386_arch_bed));
1892 symtab_hdr = &elf_symtab_hdr (abfd);
1893 sym_hashes = elf_sym_hashes (abfd);
1897 rel_end = relocs + sec->reloc_count;
1898 for (rel = relocs; rel < rel_end; rel++)
1900 unsigned int r_type;
1901 unsigned long r_symndx;
1902 struct elf_link_hash_entry *h;
1903 struct elf_i386_link_hash_entry *eh;
1904 Elf_Internal_Sym *isym;
1906 bfd_boolean size_reloc;
1908 r_symndx = ELF32_R_SYM (rel->r_info);
1909 r_type = ELF32_R_TYPE (rel->r_info);
1911 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1913 /* xgettext:c-format */
1914 _bfd_error_handler (_("%B: bad symbol index: %d"),
1919 if (r_symndx < symtab_hdr->sh_info)
1921 /* A local symbol. */
1922 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1927 /* Check relocation against local STT_GNU_IFUNC symbol. */
1928 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1930 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1934 /* Fake a STT_GNU_IFUNC symbol. */
1935 h->type = STT_GNU_IFUNC;
1938 h->forced_local = 1;
1939 h->root.type = bfd_link_hash_defined;
1947 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1948 while (h->root.type == bfd_link_hash_indirect
1949 || h->root.type == bfd_link_hash_warning)
1950 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1953 eh = (struct elf_i386_link_hash_entry *) h;
1969 if (htab->elf.dynobj == NULL)
1970 htab->elf.dynobj = abfd;
1971 /* Create the ifunc sections for static executables. */
1972 if (h->type == STT_GNU_IFUNC
1973 && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj,
1979 /* It is referenced by a non-shared object. */
1981 h->root.non_ir_ref = 1;
1983 if (h->type == STT_GNU_IFUNC)
1984 elf_tdata (info->output_bfd)->has_gnu_symbols
1985 |= elf_gnu_symbol_ifunc;
1988 if (! elf_i386_tls_transition (info, abfd, sec, contents,
1989 symtab_hdr, sym_hashes,
1990 &r_type, GOT_UNKNOWN,
1991 rel, rel_end, h, r_symndx, FALSE))
1997 htab->tls_ldm_got.refcount += 1;
2001 /* This symbol requires a procedure linkage table entry. We
2002 actually build the entry in adjust_dynamic_symbol,
2003 because this might be a case of linking PIC code which is
2004 never referenced by a dynamic object, in which case we
2005 don't need to generate a procedure linkage table entry
2008 /* If this is a local symbol, we resolve it directly without
2009 creating a procedure linkage table entry. */
2013 eh->has_got_reloc = 1;
2015 h->plt.refcount += 1;
2022 case R_386_TLS_IE_32:
2024 case R_386_TLS_GOTIE:
2025 if (!bfd_link_executable (info))
2026 info->flags |= DF_STATIC_TLS;
2032 case R_386_TLS_GOTDESC:
2033 case R_386_TLS_DESC_CALL:
2034 /* This symbol requires a global offset table entry. */
2036 int tls_type, old_tls_type;
2043 tls_type = GOT_NORMAL;
2045 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
2046 case R_386_TLS_GOTDESC:
2047 case R_386_TLS_DESC_CALL:
2048 tls_type = GOT_TLS_GDESC; break;
2049 case R_386_TLS_IE_32:
2050 if (ELF32_R_TYPE (rel->r_info) == r_type)
2051 tls_type = GOT_TLS_IE_NEG;
2053 /* If this is a GD->IE transition, we may use either of
2054 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
2055 tls_type = GOT_TLS_IE;
2058 case R_386_TLS_GOTIE:
2059 tls_type = GOT_TLS_IE_POS; break;
2064 h->got.refcount += 1;
2065 old_tls_type = elf_i386_hash_entry(h)->tls_type;
2069 bfd_signed_vma *local_got_refcounts;
2071 /* This is a global offset table entry for a local symbol. */
2072 local_got_refcounts = elf_local_got_refcounts (abfd);
2073 if (local_got_refcounts == NULL)
2077 size = symtab_hdr->sh_info;
2078 size *= (sizeof (bfd_signed_vma)
2079 + sizeof (bfd_vma) + sizeof(char));
2080 local_got_refcounts = (bfd_signed_vma *)
2081 bfd_zalloc (abfd, size);
2082 if (local_got_refcounts == NULL)
2084 elf_local_got_refcounts (abfd) = local_got_refcounts;
2085 elf_i386_local_tlsdesc_gotent (abfd)
2086 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2087 elf_i386_local_got_tls_type (abfd)
2088 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2090 local_got_refcounts[r_symndx] += 1;
2091 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
2094 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
2095 tls_type |= old_tls_type;
2096 /* If a TLS symbol is accessed using IE at least once,
2097 there is no point to use dynamic model for it. */
2098 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2099 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2100 || (tls_type & GOT_TLS_IE) == 0))
2102 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
2103 tls_type = old_tls_type;
2104 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2105 && GOT_TLS_GD_ANY_P (tls_type))
2106 tls_type |= old_tls_type;
2110 name = h->root.root.string;
2112 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
2115 /* xgettext:c-format */
2116 (_("%B: `%s' accessed both as normal and "
2117 "thread local symbol"),
2119 bfd_set_error (bfd_error_bad_value);
2124 if (old_tls_type != tls_type)
2127 elf_i386_hash_entry (h)->tls_type = tls_type;
2129 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
2137 if (htab->elf.sgot == NULL)
2139 if (htab->elf.dynobj == NULL)
2140 htab->elf.dynobj = abfd;
2141 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
2144 if (r_type != R_386_TLS_IE)
2147 eh->has_got_reloc = 1;
2152 case R_386_TLS_LE_32:
2155 eh->has_got_reloc = 1;
2156 if (bfd_link_executable (info))
2158 info->flags |= DF_STATIC_TLS;
2163 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2164 eh->has_non_got_reloc = 1;
2166 /* We are called after all symbols have been resolved. Only
2167 relocation against STT_GNU_IFUNC symbol must go through
2170 && (bfd_link_executable (info)
2171 || h->type == STT_GNU_IFUNC))
2173 /* If this reloc is in a read-only section, we might
2174 need a copy reloc. We can't check reliably at this
2175 stage whether the section is read-only, as input
2176 sections have not yet been mapped to output sections.
2177 Tentatively set the flag for now, and correct in
2178 adjust_dynamic_symbol. */
2181 /* We may need a .plt entry if the symbol is a function
2182 defined in a shared lib or is a STT_GNU_IFUNC function
2183 referenced from the code or read-only section. */
2185 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
2186 h->plt.refcount += 1;
2188 if (r_type == R_386_PC32)
2190 /* Since something like ".long foo - ." may be used
2191 as pointer, make sure that PLT is used if foo is
2192 a function defined in a shared library. */
2193 if ((sec->flags & SEC_CODE) == 0)
2194 h->pointer_equality_needed = 1;
2195 else if (h->type == STT_GNU_IFUNC
2196 && bfd_link_pic (info))
2199 name = h->root.root.string;
2201 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
2204 /* xgettext:c-format */
2205 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
2207 bfd_set_error (bfd_error_bad_value);
2213 h->pointer_equality_needed = 1;
2214 /* R_386_32 can be resolved at run-time. */
2215 if (r_type == R_386_32
2216 && (sec->flags & SEC_READONLY) == 0)
2217 eh->func_pointer_refcount += 1;
2223 /* If we are creating a shared library, and this is a reloc
2224 against a global symbol, or a non PC relative reloc
2225 against a local symbol, then we need to copy the reloc
2226 into the shared library. However, if we are linking with
2227 -Bsymbolic, we do not need to copy a reloc against a
2228 global symbol which is defined in an object we are
2229 including in the link (i.e., DEF_REGULAR is set). At
2230 this point we have not seen all the input files, so it is
2231 possible that DEF_REGULAR is not set now but will be set
2232 later (it is never cleared). In case of a weak definition,
2233 DEF_REGULAR may be cleared later by a strong definition in
2234 a shared library. We account for that possibility below by
2235 storing information in the relocs_copied field of the hash
2236 table entry. A similar situation occurs when creating
2237 shared libraries and symbol visibility changes render the
2240 If on the other hand, we are creating an executable, we
2241 may need to keep relocations for symbols satisfied by a
2242 dynamic library if we manage to avoid copy relocs for the
2245 Generate dynamic pointer relocation against STT_GNU_IFUNC
2246 symbol in the non-code section. */
2247 if ((bfd_link_pic (info)
2248 && (r_type != R_386_PC32
2250 && (! (bfd_link_pie (info)
2251 || SYMBOLIC_BIND (info, h))
2252 || h->root.type == bfd_link_hash_defweak
2253 || !h->def_regular))))
2255 && h->type == STT_GNU_IFUNC
2256 && r_type == R_386_32
2257 && (sec->flags & SEC_CODE) == 0)
2258 || (ELIMINATE_COPY_RELOCS
2259 && !bfd_link_pic (info)
2261 && (h->root.type == bfd_link_hash_defweak
2262 || !h->def_regular)))
2264 struct elf_dyn_relocs *p;
2265 struct elf_dyn_relocs **head;
2267 /* We must copy these reloc types into the output file.
2268 Create a reloc section in dynobj and make room for
2272 if (htab->elf.dynobj == NULL)
2273 htab->elf.dynobj = abfd;
2275 sreloc = _bfd_elf_make_dynamic_reloc_section
2276 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
2282 /* If this is a global symbol, we count the number of
2283 relocations we need for this symbol. */
2286 head = &eh->dyn_relocs;
2290 /* Track dynamic relocs needed for local syms too.
2291 We really need local syms available to do this
2296 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2301 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2305 vpp = &elf_section_data (s)->local_dynrel;
2306 head = (struct elf_dyn_relocs **)vpp;
2310 if (p == NULL || p->sec != sec)
2312 bfd_size_type amt = sizeof *p;
2313 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
2325 /* Count size relocation as PC-relative relocation. */
2326 if (r_type == R_386_PC32 || size_reloc)
2331 /* This relocation describes the C++ object vtable hierarchy.
2332 Reconstruct it for later use during GC. */
2333 case R_386_GNU_VTINHERIT:
2334 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2338 /* This relocation describes which C++ vtable entries are actually
2339 used. Record for later use during GC. */
2340 case R_386_GNU_VTENTRY:
2341 BFD_ASSERT (h != NULL);
2343 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
2353 && h->plt.refcount > 0
2354 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2355 || h->got.refcount > 0)
2356 && htab->plt_got == NULL)
2358 /* Create the GOT procedure linkage table. */
2359 unsigned int plt_got_align;
2360 const struct elf_backend_data *bed;
2362 bed = get_elf_backend_data (info->output_bfd);
2363 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
2364 && (sizeof (elf_i386_got_plt_entry)
2365 == sizeof (elf_i386_pic_got_plt_entry)));
2368 if (htab->elf.dynobj == NULL)
2369 htab->elf.dynobj = abfd;
2371 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2373 (bed->dynamic_sec_flags
2378 if (htab->plt_got == NULL
2379 || !bfd_set_section_alignment (htab->elf.dynobj,
2384 if (!info->no_ld_generated_unwind_info
2385 && htab->plt_got_eh_frame == NULL
2386 && get_elf_i386_backend_data (abfd)->plt->eh_frame_plt_got != NULL)
2388 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
2389 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2390 | SEC_LINKER_CREATED);
2391 htab->plt_got_eh_frame
2392 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2395 if (htab->plt_got_eh_frame == NULL
2396 || !bfd_set_section_alignment (htab->elf.dynobj,
2397 htab->plt_got_eh_frame,
2403 if (r_type == R_386_GOT32X
2404 && (h == NULL || h->type != STT_GNU_IFUNC))
2405 sec->need_convert_load = 1;
2408 if (elf_section_data (sec)->this_hdr.contents != contents)
2410 if (!info->keep_memory)
2414 /* Cache the section contents for elf_link_input_bfd. */
2415 elf_section_data (sec)->this_hdr.contents = contents;
2422 if (elf_section_data (sec)->this_hdr.contents != contents)
2424 sec->check_relocs_failed = 1;
2428 /* Return the section that should be marked against GC for a given
2432 elf_i386_gc_mark_hook (asection *sec,
2433 struct bfd_link_info *info,
2434 Elf_Internal_Rela *rel,
2435 struct elf_link_hash_entry *h,
2436 Elf_Internal_Sym *sym)
2439 switch (ELF32_R_TYPE (rel->r_info))
2441 case R_386_GNU_VTINHERIT:
2442 case R_386_GNU_VTENTRY:
2446 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2449 /* Remove undefined weak symbol from the dynamic symbol table if it
2450 is resolved to 0. */
2453 elf_i386_fixup_symbol (struct bfd_link_info *info,
2454 struct elf_link_hash_entry *h)
2456 if (h->dynindx != -1
2457 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2458 elf_i386_hash_entry (h)->has_got_reloc,
2459 elf_i386_hash_entry (h)))
2462 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2468 /* Adjust a symbol defined by a dynamic object and referenced by a
2469 regular object. The current definition is in some section of the
2470 dynamic object, but we're not including those sections. We have to
2471 change the definition to something the rest of the link can
2475 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2476 struct elf_link_hash_entry *h)
2478 struct elf_i386_link_hash_table *htab;
2480 struct elf_i386_link_hash_entry *eh;
2481 struct elf_dyn_relocs *p;
2483 /* STT_GNU_IFUNC symbol must go through PLT. */
2484 if (h->type == STT_GNU_IFUNC)
2486 /* All local STT_GNU_IFUNC references must be treate as local
2487 calls via local PLT. */
2489 && SYMBOL_CALLS_LOCAL (info, h))
2491 bfd_size_type pc_count = 0, count = 0;
2492 struct elf_dyn_relocs **pp;
2494 eh = (struct elf_i386_link_hash_entry *) h;
2495 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2497 pc_count += p->pc_count;
2498 p->count -= p->pc_count;
2507 if (pc_count || count)
2512 /* Increment PLT reference count only for PC-relative
2515 if (h->plt.refcount <= 0)
2516 h->plt.refcount = 1;
2518 h->plt.refcount += 1;
2523 if (h->plt.refcount <= 0)
2525 h->plt.offset = (bfd_vma) -1;
2531 /* If this is a function, put it in the procedure linkage table. We
2532 will fill in the contents of the procedure linkage table later,
2533 when we know the address of the .got section. */
2534 if (h->type == STT_FUNC
2537 if (h->plt.refcount <= 0
2538 || SYMBOL_CALLS_LOCAL (info, h)
2539 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2540 && h->root.type == bfd_link_hash_undefweak))
2542 /* This case can occur if we saw a PLT32 reloc in an input
2543 file, but the symbol was never referred to by a dynamic
2544 object, or if all references were garbage collected. In
2545 such a case, we don't actually need to build a procedure
2546 linkage table, and we can just do a PC32 reloc instead. */
2547 h->plt.offset = (bfd_vma) -1;
2554 /* It's possible that we incorrectly decided a .plt reloc was
2555 needed for an R_386_PC32 reloc to a non-function sym in
2556 check_relocs. We can't decide accurately between function and
2557 non-function syms in check-relocs; Objects loaded later in
2558 the link may change h->type. So fix it now. */
2559 h->plt.offset = (bfd_vma) -1;
2561 /* If this is a weak symbol, and there is a real definition, the
2562 processor independent code will have arranged for us to see the
2563 real definition first, and we can just use the same value. */
2564 if (h->u.weakdef != NULL)
2566 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2567 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2568 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2569 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2570 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2571 h->non_got_ref = h->u.weakdef->non_got_ref;
2575 /* This is a reference to a symbol defined by a dynamic object which
2576 is not a function. */
2578 /* If we are creating a shared library, we must presume that the
2579 only references to the symbol are via the global offset table.
2580 For such cases we need not do anything here; the relocations will
2581 be handled correctly by relocate_section. */
2582 if (!bfd_link_executable (info))
2585 /* If there are no references to this symbol that do not use the
2586 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2588 eh = (struct elf_i386_link_hash_entry *) h;
2589 if (!h->non_got_ref && !eh->gotoff_ref)
2592 /* If -z nocopyreloc was given, we won't generate them either. */
2593 if (info->nocopyreloc)
2599 htab = elf_i386_hash_table (info);
2603 /* If there aren't any dynamic relocs in read-only sections nor
2604 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2605 avoid the copy reloc. This doesn't work on VxWorks, where we can
2606 not have dynamic relocations (other than copy and jump slot
2607 relocations) in an executable. */
2608 if (ELIMINATE_COPY_RELOCS
2610 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2612 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2614 s = p->sec->output_section;
2615 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2626 /* We must allocate the symbol in our .dynbss section, which will
2627 become part of the .bss section of the executable. There will be
2628 an entry for this symbol in the .dynsym section. The dynamic
2629 object will contain position independent code, so all references
2630 from the dynamic object to this symbol will go through the global
2631 offset table. The dynamic linker will use the .dynsym entry to
2632 determine the address it must put in the global offset table, so
2633 both the dynamic object and the regular object will refer to the
2634 same memory location for the variable. */
2636 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2637 copy the initial value out of the dynamic object and into the
2638 runtime process image. */
2639 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2641 s = htab->elf.sdynrelro;
2642 srel = htab->elf.sreldynrelro;
2646 s = htab->elf.sdynbss;
2647 srel = htab->elf.srelbss;
2649 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2651 srel->size += sizeof (Elf32_External_Rel);
2655 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2658 /* Allocate space in .plt, .got and associated reloc sections for
2662 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2664 struct bfd_link_info *info;
2665 struct elf_i386_link_hash_table *htab;
2666 struct elf_i386_link_hash_entry *eh;
2667 struct elf_dyn_relocs *p;
2668 unsigned plt_entry_size;
2669 bfd_boolean resolved_to_zero;
2671 if (h->root.type == bfd_link_hash_indirect)
2674 eh = (struct elf_i386_link_hash_entry *) h;
2676 info = (struct bfd_link_info *) inf;
2677 htab = elf_i386_hash_table (info);
2681 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2683 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2687 /* Clear the reference count of function pointer relocations if
2688 symbol isn't a normal function. */
2689 if (h->type != STT_FUNC)
2690 eh->func_pointer_refcount = 0;
2692 /* We can't use the GOT PLT if pointer equality is needed since
2693 finish_dynamic_symbol won't clear symbol value and the dynamic
2694 linker won't update the GOT slot. We will get into an infinite
2695 loop at run-time. */
2696 if (htab->plt_got != NULL
2697 && h->type != STT_GNU_IFUNC
2698 && !h->pointer_equality_needed
2699 && h->plt.refcount > 0
2700 && h->got.refcount > 0)
2702 /* Don't use the regular PLT if there are both GOT and GOTPLT
2704 h->plt.offset = (bfd_vma) -1;
2706 /* Use the GOT PLT. */
2707 eh->plt_got.refcount = 1;
2710 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2711 here if it is defined and referenced in a non-shared object. */
2712 if (h->type == STT_GNU_IFUNC
2714 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2715 &htab->readonly_dynrelocs_against_ifunc,
2717 plt_entry_size, 4, TRUE);
2718 /* Don't create the PLT entry if there are only function pointer
2719 relocations which can be resolved at run-time. */
2720 else if (htab->elf.dynamic_sections_created
2721 && (h->plt.refcount > eh->func_pointer_refcount
2722 || eh->plt_got.refcount > 0))
2724 bfd_boolean use_plt_got;
2726 /* Clear the reference count of function pointer relocations
2728 eh->func_pointer_refcount = 0;
2730 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2732 /* Don't use the regular PLT for DF_BIND_NOW. */
2733 h->plt.offset = (bfd_vma) -1;
2735 /* Use the GOT PLT. */
2736 h->got.refcount = 1;
2737 eh->plt_got.refcount = 1;
2740 use_plt_got = eh->plt_got.refcount > 0;
2742 /* Make sure this symbol is output as a dynamic symbol.
2743 Undefined weak syms won't yet be marked as dynamic. */
2744 if (h->dynindx == -1
2746 && !resolved_to_zero)
2748 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2752 if (bfd_link_pic (info)
2753 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2755 asection *s = htab->elf.splt;
2756 asection *got_s = htab->plt_got;
2758 /* If this is the first .plt entry, make room for the special
2759 first entry. The .plt section is used by prelink to undo
2760 prelinking for dynamic relocations. */
2762 s->size = plt_entry_size;
2765 eh->plt_got.offset = got_s->size;
2767 h->plt.offset = s->size;
2769 /* If this symbol is not defined in a regular file, and we are
2770 not generating a shared library, then set the symbol to this
2771 location in the .plt. This is required to make function
2772 pointers compare as equal between the normal executable and
2773 the shared library. */
2774 if (! bfd_link_pic (info)
2779 /* We need to make a call to the entry of the GOT PLT
2780 instead of regular PLT entry. */
2781 h->root.u.def.section = got_s;
2782 h->root.u.def.value = eh->plt_got.offset;
2786 h->root.u.def.section = s;
2787 h->root.u.def.value = h->plt.offset;
2791 /* Make room for this entry. */
2793 got_s->size += sizeof (elf_i386_got_plt_entry);
2796 s->size += plt_entry_size;
2798 /* We also need to make an entry in the .got.plt section,
2799 which will be placed in the .got section by the linker
2801 htab->elf.sgotplt->size += 4;
2803 /* There should be no PLT relocation against resolved
2804 undefined weak symbol in executable. */
2805 if (!resolved_to_zero)
2807 /* We also need to make an entry in the .rel.plt
2809 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2810 htab->elf.srelplt->reloc_count++;
2814 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2815 && !bfd_link_pic (info))
2817 /* VxWorks has a second set of relocations for each PLT entry
2818 in executables. They go in a separate relocation section,
2819 which is processed by the kernel loader. */
2821 /* There are two relocations for the initial PLT entry: an
2822 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2823 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2825 if (h->plt.offset == plt_entry_size)
2826 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2828 /* There are two extra relocations for each subsequent PLT entry:
2829 an R_386_32 relocation for the GOT entry, and an R_386_32
2830 relocation for the PLT entry. */
2832 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2837 eh->plt_got.offset = (bfd_vma) -1;
2838 h->plt.offset = (bfd_vma) -1;
2844 eh->plt_got.offset = (bfd_vma) -1;
2845 h->plt.offset = (bfd_vma) -1;
2849 eh->tlsdesc_got = (bfd_vma) -1;
2851 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2852 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2853 if (h->got.refcount > 0
2854 && bfd_link_executable (info)
2856 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2857 h->got.offset = (bfd_vma) -1;
2858 else if (h->got.refcount > 0)
2862 int tls_type = elf_i386_hash_entry(h)->tls_type;
2864 /* Make sure this symbol is output as a dynamic symbol.
2865 Undefined weak syms won't yet be marked as dynamic. */
2866 if (h->dynindx == -1
2868 && !resolved_to_zero)
2870 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2875 if (GOT_TLS_GDESC_P (tls_type))
2877 eh->tlsdesc_got = htab->elf.sgotplt->size
2878 - elf_i386_compute_jump_table_size (htab);
2879 htab->elf.sgotplt->size += 8;
2880 h->got.offset = (bfd_vma) -2;
2882 if (! GOT_TLS_GDESC_P (tls_type)
2883 || GOT_TLS_GD_P (tls_type))
2885 h->got.offset = s->size;
2887 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2888 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2891 dyn = htab->elf.dynamic_sections_created;
2892 /* R_386_TLS_IE_32 needs one dynamic relocation,
2893 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2894 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2895 need two), R_386_TLS_GD needs one if local symbol and two if
2896 global. No dynamic relocation against resolved undefined weak
2897 symbol in executable. */
2898 if (tls_type == GOT_TLS_IE_BOTH)
2899 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2900 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2901 || (tls_type & GOT_TLS_IE))
2902 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2903 else if (GOT_TLS_GD_P (tls_type))
2904 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2905 else if (! GOT_TLS_GDESC_P (tls_type)
2906 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2907 && !resolved_to_zero)
2908 || h->root.type != bfd_link_hash_undefweak)
2909 && (bfd_link_pic (info)
2910 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2911 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2912 if (GOT_TLS_GDESC_P (tls_type))
2913 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2916 h->got.offset = (bfd_vma) -1;
2918 if (eh->dyn_relocs == NULL)
2921 /* In the shared -Bsymbolic case, discard space allocated for
2922 dynamic pc-relative relocs against symbols which turn out to be
2923 defined in regular objects. For the normal shared case, discard
2924 space for pc-relative relocs that have become local due to symbol
2925 visibility changes. */
2927 if (bfd_link_pic (info))
2929 /* The only reloc that uses pc_count is R_386_PC32, which will
2930 appear on a call or on something like ".long foo - .". We
2931 want calls to protected symbols to resolve directly to the
2932 function rather than going via the plt. If people want
2933 function pointer comparisons to work as expected then they
2934 should avoid writing assembly like ".long foo - .". */
2935 if (SYMBOL_CALLS_LOCAL (info, h))
2937 struct elf_dyn_relocs **pp;
2939 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2941 p->count -= p->pc_count;
2950 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2952 struct elf_dyn_relocs **pp;
2953 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2955 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2962 /* Also discard relocs on undefined weak syms with non-default
2963 visibility or in PIE. */
2964 if (eh->dyn_relocs != NULL
2965 && h->root.type == bfd_link_hash_undefweak)
2967 /* Undefined weak symbol is never bound locally in shared
2969 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2970 || resolved_to_zero)
2974 /* Keep dynamic non-GOT/non-PLT relocation so that we
2975 can branch to 0 without PLT. */
2976 struct elf_dyn_relocs **pp;
2978 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2979 if (p->pc_count == 0)
2983 /* Remove non-R_386_PC32 relocation. */
2984 p->count = p->pc_count;
2988 if (eh->dyn_relocs != NULL)
2990 /* Make sure undefined weak symbols are output
2991 as dynamic symbols in PIEs for dynamic non-GOT
2992 non-PLT reloations. */
2993 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2998 eh->dyn_relocs = NULL;
3000 else if (h->dynindx == -1
3001 && !h->forced_local)
3003 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3008 else if (ELIMINATE_COPY_RELOCS)
3010 /* For the non-shared case, discard space for relocs against
3011 symbols which turn out to need copy relocs or are not
3012 dynamic. Keep dynamic relocations for run-time function
3013 pointer initialization. */
3015 if ((!h->non_got_ref
3016 || eh->func_pointer_refcount > 0
3017 || (h->root.type == bfd_link_hash_undefweak
3018 && !resolved_to_zero))
3021 || (htab->elf.dynamic_sections_created
3022 && (h->root.type == bfd_link_hash_undefweak
3023 || h->root.type == bfd_link_hash_undefined))))
3025 /* Make sure this symbol is output as a dynamic symbol.
3026 Undefined weak syms won't yet be marked as dynamic. */
3027 if (h->dynindx == -1
3029 && !resolved_to_zero)
3031 if (! bfd_elf_link_record_dynamic_symbol (info, h))
3035 /* If that succeeded, we know we'll be keeping all the
3037 if (h->dynindx != -1)
3041 eh->dyn_relocs = NULL;
3042 eh->func_pointer_refcount = 0;
3047 /* Finally, allocate space. */
3048 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3052 sreloc = elf_section_data (p->sec)->sreloc;
3054 BFD_ASSERT (sreloc != NULL);
3055 sreloc->size += p->count * sizeof (Elf32_External_Rel);
3061 /* Allocate space in .plt, .got and associated reloc sections for
3062 local dynamic relocs. */
3065 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
3067 struct elf_link_hash_entry *h
3068 = (struct elf_link_hash_entry *) *slot;
3070 if (h->type != STT_GNU_IFUNC
3074 || h->root.type != bfd_link_hash_defined)
3077 return elf_i386_allocate_dynrelocs (h, inf);
3080 /* Find any dynamic relocs that apply to read-only sections. */
3083 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3085 struct elf_i386_link_hash_entry *eh;
3086 struct elf_dyn_relocs *p;
3088 /* Skip local IFUNC symbols. */
3089 if (h->forced_local && h->type == STT_GNU_IFUNC)
3092 eh = (struct elf_i386_link_hash_entry *) h;
3093 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3095 asection *s = p->sec->output_section;
3097 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3099 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3101 info->flags |= DF_TEXTREL;
3103 if ((info->warn_shared_textrel && bfd_link_pic (info))
3104 || info->error_textrel)
3105 /* xgettext:c-format */
3106 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3107 p->sec->owner, h->root.root.string,
3110 /* Not an error, just cut short the traversal. */
3117 /* Convert load via the GOT slot to load immediate. */
3120 elf_i386_convert_load (bfd *abfd, asection *sec,
3121 struct bfd_link_info *link_info)
3123 struct elf_i386_link_hash_table *htab;
3124 Elf_Internal_Shdr *symtab_hdr;
3125 Elf_Internal_Rela *internal_relocs;
3126 Elf_Internal_Rela *irel, *irelend;
3128 bfd_boolean changed;
3129 bfd_signed_vma *local_got_refcounts;
3131 /* Don't even try to convert non-ELF outputs. */
3132 if (!is_elf_hash_table (link_info->hash))
3135 /* Nothing to do if there is no need or no output. */
3136 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
3137 || sec->need_convert_load == 0
3138 || bfd_is_abs_section (sec->output_section))
3141 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3143 /* Load the relocations for this section. */
3144 internal_relocs = (_bfd_elf_link_read_relocs
3145 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3146 link_info->keep_memory));
3147 if (internal_relocs == NULL)
3151 htab = elf_i386_hash_table (link_info);
3152 local_got_refcounts = elf_local_got_refcounts (abfd);
3154 /* Get the section contents. */
3155 if (elf_section_data (sec)->this_hdr.contents != NULL)
3156 contents = elf_section_data (sec)->this_hdr.contents;
3159 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3163 irelend = internal_relocs + sec->reloc_count;
3164 for (irel = internal_relocs; irel < irelend; irel++)
3166 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3167 unsigned int r_symndx;
3168 struct elf_link_hash_entry *h;
3169 bfd_boolean converted;
3171 /* Don't convert R_386_GOT32 since we can't tell if it is applied
3172 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
3173 if (r_type != R_386_GOT32X)
3176 r_symndx = ELF32_R_SYM (irel->r_info);
3177 if (r_symndx < symtab_hdr->sh_info)
3178 h = elf_i386_get_local_sym_hash (htab, sec->owner,
3179 (const Elf_Internal_Rela *) irel,
3183 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
3184 while (h->root.type == bfd_link_hash_indirect
3185 || h->root.type == bfd_link_hash_warning)
3186 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3189 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3190 if (h != NULL && h->type == STT_GNU_IFUNC)
3194 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
3195 irel, h, &converted, link_info))
3200 changed = converted;
3203 if (h->got.refcount > 0)
3204 h->got.refcount -= 1;
3208 if (local_got_refcounts != NULL
3209 && local_got_refcounts[r_symndx] > 0)
3210 local_got_refcounts[r_symndx] -= 1;
3215 if (contents != NULL
3216 && elf_section_data (sec)->this_hdr.contents != contents)
3218 if (!changed && !link_info->keep_memory)
3222 /* Cache the section contents for elf_link_input_bfd. */
3223 elf_section_data (sec)->this_hdr.contents = contents;
3227 if (elf_section_data (sec)->relocs != internal_relocs)
3230 free (internal_relocs);
3232 elf_section_data (sec)->relocs = internal_relocs;
3238 if (contents != NULL
3239 && elf_section_data (sec)->this_hdr.contents != contents)
3241 if (internal_relocs != NULL
3242 && elf_section_data (sec)->relocs != internal_relocs)
3243 free (internal_relocs);
3247 /* Set the sizes of the dynamic sections. */
3250 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
3252 struct elf_i386_link_hash_table *htab;
3258 htab = elf_i386_hash_table (info);
3261 dynobj = htab->elf.dynobj;
3265 /* Set up .got offsets for local syms, and space for local dynamic
3267 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3269 bfd_signed_vma *local_got;
3270 bfd_signed_vma *end_local_got;
3271 char *local_tls_type;
3272 bfd_vma *local_tlsdesc_gotent;
3273 bfd_size_type locsymcount;
3274 Elf_Internal_Shdr *symtab_hdr;
3277 if (! is_i386_elf (ibfd))
3280 for (s = ibfd->sections; s != NULL; s = s->next)
3282 struct elf_dyn_relocs *p;
3284 if (!elf_i386_convert_load (ibfd, s, info))
3287 for (p = ((struct elf_dyn_relocs *)
3288 elf_section_data (s)->local_dynrel);
3292 if (!bfd_is_abs_section (p->sec)
3293 && bfd_is_abs_section (p->sec->output_section))
3295 /* Input section has been discarded, either because
3296 it is a copy of a linkonce section or due to
3297 linker script /DISCARD/, so we'll be discarding
3300 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3301 && strcmp (p->sec->output_section->name,
3304 /* Relocations in vxworks .tls_vars sections are
3305 handled specially by the loader. */
3307 else if (p->count != 0)
3309 srel = elf_section_data (p->sec)->sreloc;
3310 srel->size += p->count * sizeof (Elf32_External_Rel);
3311 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3312 && (info->flags & DF_TEXTREL) == 0)
3314 info->flags |= DF_TEXTREL;
3315 if ((info->warn_shared_textrel && bfd_link_pic (info))
3316 || info->error_textrel)
3317 /* xgettext:c-format */
3318 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3319 p->sec->owner, p->sec);
3325 local_got = elf_local_got_refcounts (ibfd);
3329 symtab_hdr = &elf_symtab_hdr (ibfd);
3330 locsymcount = symtab_hdr->sh_info;
3331 end_local_got = local_got + locsymcount;
3332 local_tls_type = elf_i386_local_got_tls_type (ibfd);
3333 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
3335 srel = htab->elf.srelgot;
3336 for (; local_got < end_local_got;
3337 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3339 *local_tlsdesc_gotent = (bfd_vma) -1;
3342 if (GOT_TLS_GDESC_P (*local_tls_type))
3344 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3345 - elf_i386_compute_jump_table_size (htab);
3346 htab->elf.sgotplt->size += 8;
3347 *local_got = (bfd_vma) -2;
3349 if (! GOT_TLS_GDESC_P (*local_tls_type)
3350 || GOT_TLS_GD_P (*local_tls_type))
3352 *local_got = s->size;
3354 if (GOT_TLS_GD_P (*local_tls_type)
3355 || *local_tls_type == GOT_TLS_IE_BOTH)
3358 if (bfd_link_pic (info)
3359 || GOT_TLS_GD_ANY_P (*local_tls_type)
3360 || (*local_tls_type & GOT_TLS_IE))
3362 if (*local_tls_type == GOT_TLS_IE_BOTH)
3363 srel->size += 2 * sizeof (Elf32_External_Rel);
3364 else if (GOT_TLS_GD_P (*local_tls_type)
3365 || ! GOT_TLS_GDESC_P (*local_tls_type))
3366 srel->size += sizeof (Elf32_External_Rel);
3367 if (GOT_TLS_GDESC_P (*local_tls_type))
3368 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
3372 *local_got = (bfd_vma) -1;
3376 if (htab->tls_ldm_got.refcount > 0)
3378 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3380 htab->tls_ldm_got.offset = htab->elf.sgot->size;
3381 htab->elf.sgot->size += 8;
3382 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
3385 htab->tls_ldm_got.offset = -1;
3387 /* Allocate global sym .plt and .got entries, and space for global
3388 sym dynamic relocs. */
3389 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
3391 /* Allocate .plt and .got entries, and space for local symbols. */
3392 htab_traverse (htab->loc_hash_table,
3393 elf_i386_allocate_local_dynrelocs,
3396 /* For every jump slot reserved in the sgotplt, reloc_count is
3397 incremented. However, when we reserve space for TLS descriptors,
3398 it's not incremented, so in order to compute the space reserved
3399 for them, it suffices to multiply the reloc count by the jump
3402 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3403 so that R_386_IRELATIVE entries come last. */
3404 if (htab->elf.srelplt)
3406 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
3407 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
3408 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3410 else if (htab->elf.irelplt)
3411 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3414 if (htab->elf.sgotplt)
3416 /* Don't allocate .got.plt section if there are no GOT nor PLT
3417 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3418 if ((htab->elf.hgot == NULL
3419 || !htab->elf.hgot->ref_regular_nonweak)
3420 && (htab->elf.sgotplt->size
3421 == get_elf_backend_data (output_bfd)->got_header_size)
3422 && (htab->elf.splt == NULL
3423 || htab->elf.splt->size == 0)
3424 && (htab->elf.sgot == NULL
3425 || htab->elf.sgot->size == 0)
3426 && (htab->elf.iplt == NULL
3427 || htab->elf.iplt->size == 0)
3428 && (htab->elf.igotplt == NULL
3429 || htab->elf.igotplt->size == 0))
3430 htab->elf.sgotplt->size = 0;
3433 if (_bfd_elf_eh_frame_present (info))
3435 if (htab->plt_eh_frame != NULL
3436 && htab->elf.splt != NULL
3437 && htab->elf.splt->size != 0
3438 && !bfd_is_abs_section (htab->elf.splt->output_section))
3439 htab->plt_eh_frame->size
3440 = get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt_size;
3442 if (htab->plt_got_eh_frame != NULL
3443 && htab->plt_got != NULL
3444 && htab->plt_got->size != 0
3445 && !bfd_is_abs_section (htab->plt_got->output_section))
3446 htab->plt_got_eh_frame->size
3447 = get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt_got_size;
3450 /* We now have determined the sizes of the various dynamic sections.
3451 Allocate memory for them. */
3453 for (s = dynobj->sections; s != NULL; s = s->next)
3455 bfd_boolean strip_section = TRUE;
3457 if ((s->flags & SEC_LINKER_CREATED) == 0)
3460 if (s == htab->elf.splt
3461 || s == htab->elf.sgot)
3463 /* Strip this section if we don't need it; see the
3465 /* We'd like to strip these sections if they aren't needed, but if
3466 we've exported dynamic symbols from them we must leave them.
3467 It's too late to tell BFD to get rid of the symbols. */
3469 if (htab->elf.hplt != NULL)
3470 strip_section = FALSE;
3472 else if (s == htab->elf.sgotplt
3473 || s == htab->elf.iplt
3474 || s == htab->elf.igotplt
3475 || s == htab->plt_got
3476 || s == htab->plt_eh_frame
3477 || s == htab->plt_got_eh_frame
3478 || s == htab->elf.sdynbss
3479 || s == htab->elf.sdynrelro)
3481 /* Strip these too. */
3483 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
3486 && s != htab->elf.srelplt
3487 && s != htab->srelplt2)
3490 /* We use the reloc_count field as a counter if we need
3491 to copy relocs into the output file. */
3496 /* It's not one of our sections, so don't allocate space. */
3502 /* If we don't need this section, strip it from the
3503 output file. This is mostly to handle .rel.bss and
3504 .rel.plt. We must create both sections in
3505 create_dynamic_sections, because they must be created
3506 before the linker maps input sections to output
3507 sections. The linker does that before
3508 adjust_dynamic_symbol is called, and it is that
3509 function which decides whether anything needs to go
3510 into these sections. */
3512 s->flags |= SEC_EXCLUDE;
3516 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3519 /* Allocate memory for the section contents. We use bfd_zalloc
3520 here in case unused entries are not reclaimed before the
3521 section's contents are written out. This should not happen,
3522 but this way if it does, we get a R_386_NONE reloc instead
3524 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3525 if (s->contents == NULL)
3529 if (htab->plt_eh_frame != NULL
3530 && htab->plt_eh_frame->contents != NULL)
3532 memcpy (htab->plt_eh_frame->contents,
3533 get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt,
3534 htab->plt_eh_frame->size);
3535 bfd_put_32 (dynobj, htab->elf.splt->size,
3536 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3539 if (htab->plt_got_eh_frame != NULL
3540 && htab->plt_got_eh_frame->contents != NULL)
3542 memcpy (htab->plt_got_eh_frame->contents,
3543 get_elf_i386_backend_data (output_bfd)->plt->eh_frame_plt_got,
3544 htab->plt_got_eh_frame->size);
3545 bfd_put_32 (dynobj, htab->plt_got->size,
3546 (htab->plt_got_eh_frame->contents
3547 + PLT_FDE_LEN_OFFSET));
3550 if (htab->elf.dynamic_sections_created)
3552 /* Add some entries to the .dynamic section. We fill in the
3553 values later, in elf_i386_finish_dynamic_sections, but we
3554 must add the entries now so that we get the correct size for
3555 the .dynamic section. The DT_DEBUG entry is filled in by the
3556 dynamic linker and used by the debugger. */
3557 #define add_dynamic_entry(TAG, VAL) \
3558 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3560 if (bfd_link_executable (info))
3562 if (!add_dynamic_entry (DT_DEBUG, 0))
3566 if (htab->elf.splt->size != 0)
3568 /* DT_PLTGOT is used by prelink even if there is no PLT
3570 if (!add_dynamic_entry (DT_PLTGOT, 0))
3573 if (htab->elf.srelplt->size != 0)
3575 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3576 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3577 || !add_dynamic_entry (DT_JMPREL, 0))
3584 if (!add_dynamic_entry (DT_REL, 0)
3585 || !add_dynamic_entry (DT_RELSZ, 0)
3586 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3589 /* If any dynamic relocs apply to a read-only section,
3590 then we need a DT_TEXTREL entry. */
3591 if ((info->flags & DF_TEXTREL) == 0)
3592 elf_link_hash_traverse (&htab->elf,
3593 elf_i386_readonly_dynrelocs, info);
3595 if ((info->flags & DF_TEXTREL) != 0)
3597 if (htab->readonly_dynrelocs_against_ifunc)
3599 info->callbacks->einfo
3600 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3601 bfd_set_error (bfd_error_bad_value);
3605 if (!add_dynamic_entry (DT_TEXTREL, 0))
3609 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3610 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3613 #undef add_dynamic_entry
3619 elf_i386_always_size_sections (bfd *output_bfd,
3620 struct bfd_link_info *info)
3622 asection *tls_sec = elf_hash_table (info)->tls_sec;
3626 struct elf_link_hash_entry *tlsbase;
3628 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3629 "_TLS_MODULE_BASE_",
3630 FALSE, FALSE, FALSE);
3632 if (tlsbase && tlsbase->type == STT_TLS)
3634 struct elf_i386_link_hash_table *htab;
3635 struct bfd_link_hash_entry *bh = NULL;
3636 const struct elf_backend_data *bed
3637 = get_elf_backend_data (output_bfd);
3639 htab = elf_i386_hash_table (info);
3643 if (!(_bfd_generic_link_add_one_symbol
3644 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3645 tls_sec, 0, NULL, FALSE,
3646 bed->collect, &bh)))
3649 htab->tls_module_base = bh;
3651 tlsbase = (struct elf_link_hash_entry *)bh;
3652 tlsbase->def_regular = 1;
3653 tlsbase->other = STV_HIDDEN;
3654 tlsbase->root.linker_def = 1;
3655 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3662 /* Set the correct type for an x86 ELF section. We do this by the
3663 section name, which is a hack, but ought to work. */
3666 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3667 Elf_Internal_Shdr *hdr,
3672 name = bfd_get_section_name (abfd, sec);
3674 /* This is an ugly, but unfortunately necessary hack that is
3675 needed when producing EFI binaries on x86. It tells
3676 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3677 containing ELF relocation info. We need this hack in order to
3678 be able to generate ELF binaries that can be translated into
3679 EFI applications (which are essentially COFF objects). Those
3680 files contain a COFF ".reloc" section inside an ELFNN object,
3681 which would normally cause BFD to segfault because it would
3682 attempt to interpret this section as containing relocation
3683 entries for section "oc". With this hack enabled, ".reloc"
3684 will be treated as a normal data section, which will avoid the
3685 segfault. However, you won't be able to create an ELFNN binary
3686 with a section named "oc" that needs relocations, but that's
3687 the kind of ugly side-effects you get when detecting section
3688 types based on their names... In practice, this limitation is
3689 unlikely to bite. */
3690 if (strcmp (name, ".reloc") == 0)
3691 hdr->sh_type = SHT_PROGBITS;
3696 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3697 executables. Rather than setting it to the beginning of the TLS
3698 section, we have to set it to the end. This function may be called
3699 multiple times, it is idempotent. */
3702 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3704 struct elf_i386_link_hash_table *htab;
3705 struct bfd_link_hash_entry *base;
3707 if (!bfd_link_executable (info))
3710 htab = elf_i386_hash_table (info);
3714 base = htab->tls_module_base;
3718 base->u.def.value = htab->elf.tls_size;
3721 /* Return the base VMA address which should be subtracted from real addresses
3722 when resolving @dtpoff relocation.
3723 This is PT_TLS segment p_vaddr. */
3726 elf_i386_dtpoff_base (struct bfd_link_info *info)
3728 /* If tls_sec is NULL, we should have signalled an error already. */
3729 if (elf_hash_table (info)->tls_sec == NULL)
3731 return elf_hash_table (info)->tls_sec->vma;
3734 /* Return the relocation value for @tpoff relocation
3735 if STT_TLS virtual address is ADDRESS. */
3738 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3740 struct elf_link_hash_table *htab = elf_hash_table (info);
3741 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3742 bfd_vma static_tls_size;
3744 /* If tls_sec is NULL, we should have signalled an error already. */
3745 if (htab->tls_sec == NULL)
3748 /* Consider special static TLS alignment requirements. */
3749 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3750 return static_tls_size + htab->tls_sec->vma - address;
3753 /* Relocate an i386 ELF section. */
3756 elf_i386_relocate_section (bfd *output_bfd,
3757 struct bfd_link_info *info,
3759 asection *input_section,
3761 Elf_Internal_Rela *relocs,
3762 Elf_Internal_Sym *local_syms,
3763 asection **local_sections)
3765 struct elf_i386_link_hash_table *htab;
3766 Elf_Internal_Shdr *symtab_hdr;
3767 struct elf_link_hash_entry **sym_hashes;
3768 bfd_vma *local_got_offsets;
3769 bfd_vma *local_tlsdesc_gotents;
3770 Elf_Internal_Rela *rel;
3771 Elf_Internal_Rela *wrel;
3772 Elf_Internal_Rela *relend;
3773 bfd_boolean is_vxworks_tls;
3774 unsigned plt_entry_size;
3776 BFD_ASSERT (is_i386_elf (input_bfd));
3778 /* Skip if check_relocs failed. */
3779 if (input_section->check_relocs_failed)
3782 htab = elf_i386_hash_table (info);
3785 symtab_hdr = &elf_symtab_hdr (input_bfd);
3786 sym_hashes = elf_sym_hashes (input_bfd);
3787 local_got_offsets = elf_local_got_offsets (input_bfd);
3788 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3789 /* We have to handle relocations in vxworks .tls_vars sections
3790 specially, because the dynamic loader is 'weird'. */
3791 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3792 && bfd_link_pic (info)
3793 && !strcmp (input_section->output_section->name,
3796 elf_i386_set_tls_module_base (info);
3798 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3800 rel = wrel = relocs;
3801 relend = relocs + input_section->reloc_count;
3802 for (; rel < relend; wrel++, rel++)
3804 unsigned int r_type;
3805 reloc_howto_type *howto;
3806 unsigned long r_symndx;
3807 struct elf_link_hash_entry *h;
3808 struct elf_i386_link_hash_entry *eh;
3809 Elf_Internal_Sym *sym;
3811 bfd_vma off, offplt, plt_offset;
3813 bfd_boolean unresolved_reloc;
3814 bfd_reloc_status_type r;
3818 asection *resolved_plt;
3819 bfd_boolean resolved_to_zero;
3821 r_type = ELF32_R_TYPE (rel->r_info);
3822 if (r_type == R_386_GNU_VTINHERIT
3823 || r_type == R_386_GNU_VTENTRY)
3830 if ((indx = r_type) >= R_386_standard
3831 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3832 >= R_386_ext - R_386_standard)
3833 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3834 >= R_386_ext2 - R_386_ext))
3837 /* xgettext:c-format */
3838 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3839 input_bfd, input_section, r_type);
3840 bfd_set_error (bfd_error_bad_value);
3843 howto = elf_howto_table + indx;
3845 r_symndx = ELF32_R_SYM (rel->r_info);
3849 unresolved_reloc = FALSE;
3850 if (r_symndx < symtab_hdr->sh_info)
3852 sym = local_syms + r_symndx;
3853 sec = local_sections[r_symndx];
3854 relocation = (sec->output_section->vma
3855 + sec->output_offset
3857 st_size = sym->st_size;
3859 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3860 && ((sec->flags & SEC_MERGE) != 0
3861 || (bfd_link_relocatable (info)
3862 && sec->output_offset != 0)))
3865 bfd_byte *where = contents + rel->r_offset;
3867 switch (howto->size)
3870 addend = bfd_get_8 (input_bfd, where);
3871 if (howto->pc_relative)
3873 addend = (addend ^ 0x80) - 0x80;
3878 addend = bfd_get_16 (input_bfd, where);
3879 if (howto->pc_relative)
3881 addend = (addend ^ 0x8000) - 0x8000;
3886 addend = bfd_get_32 (input_bfd, where);
3887 if (howto->pc_relative)
3889 addend = (addend ^ 0x80000000) - 0x80000000;
3897 if (bfd_link_relocatable (info))
3898 addend += sec->output_offset;
3901 asection *msec = sec;
3902 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3904 addend -= relocation;
3905 addend += msec->output_section->vma + msec->output_offset;
3908 switch (howto->size)
3911 /* FIXME: overflow checks. */
3912 if (howto->pc_relative)
3914 bfd_put_8 (input_bfd, addend, where);
3917 if (howto->pc_relative)
3919 bfd_put_16 (input_bfd, addend, where);
3922 if (howto->pc_relative)
3924 bfd_put_32 (input_bfd, addend, where);
3928 else if (!bfd_link_relocatable (info)
3929 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3931 /* Relocate against local STT_GNU_IFUNC symbol. */
3932 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3937 /* Set STT_GNU_IFUNC symbol value. */
3938 h->root.u.def.value = sym->st_value;
3939 h->root.u.def.section = sec;
3944 bfd_boolean warned ATTRIBUTE_UNUSED;
3945 bfd_boolean ignored ATTRIBUTE_UNUSED;
3947 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3948 r_symndx, symtab_hdr, sym_hashes,
3950 unresolved_reloc, warned, ignored);
3954 if (sec != NULL && discarded_section (sec))
3956 _bfd_clear_contents (howto, input_bfd, input_section,
3957 contents + rel->r_offset);
3958 wrel->r_offset = rel->r_offset;
3962 /* For ld -r, remove relocations in debug sections against
3963 sections defined in discarded sections. Not done for
3964 eh_frame editing code expects to be present. */
3965 if (bfd_link_relocatable (info)
3966 && (input_section->flags & SEC_DEBUGGING))
3972 if (bfd_link_relocatable (info))
3979 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3980 it here if it is defined in a non-shared object. */
3982 && h->type == STT_GNU_IFUNC
3985 asection *plt, *gotplt, *base_got;
3989 if ((input_section->flags & SEC_ALLOC) == 0)
3991 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3992 sections because such sections are not SEC_ALLOC and
3993 thus ld.so will not process them. */
3994 if ((input_section->flags & SEC_DEBUGGING) != 0)
3999 /* STT_GNU_IFUNC symbol must go through PLT. */
4000 if (htab->elf.splt != NULL)
4002 plt = htab->elf.splt;
4003 gotplt = htab->elf.sgotplt;
4007 plt = htab->elf.iplt;
4008 gotplt = htab->elf.igotplt;
4018 base_got = htab->elf.sgot;
4019 off = h->got.offset;
4021 if (base_got == NULL)
4024 if (off == (bfd_vma) -1)
4026 /* We can't use h->got.offset here to save state, or
4027 even just remember the offset, as finish_dynamic_symbol
4028 would use that as offset into .got. */
4030 if (h->plt.offset == (bfd_vma) -1)
4033 if (htab->elf.splt != NULL)
4035 plt_index = h->plt.offset / plt_entry_size - 1;
4036 off = (plt_index + 3) * 4;
4037 base_got = htab->elf.sgotplt;
4041 plt_index = h->plt.offset / plt_entry_size;
4042 off = plt_index * 4;
4043 base_got = htab->elf.igotplt;
4046 if (h->dynindx == -1
4050 /* This references the local defitionion. We must
4051 initialize this entry in the global offset table.
4052 Since the offset must always be a multiple of 8,
4053 we use the least significant bit to record
4054 whether we have initialized it already.
4056 When doing a dynamic link, we create a .rela.got
4057 relocation entry to initialize the value. This
4058 is done in the finish_dynamic_symbol routine. */
4063 bfd_put_32 (output_bfd, relocation,
4064 base_got->contents + off);
4072 relocation = (base_got->output_section->vma
4073 + base_got->output_offset + off
4074 - gotplt->output_section->vma
4075 - gotplt->output_offset);
4077 if (rel->r_offset > 1
4078 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
4079 && *(contents + rel->r_offset - 2) != 0x8d)
4081 if (bfd_link_pic (info))
4082 goto disallow_got32;
4084 /* Add the GOT base if there is no base register. */
4085 relocation += (gotplt->output_section->vma
4086 + gotplt->output_offset);
4088 else if (htab->elf.splt == NULL)
4090 /* Adjust for static executables. */
4091 relocation += gotplt->output_offset;
4097 if (h->plt.offset == (bfd_vma) -1)
4099 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4100 if (r_type == R_386_32
4101 && (input_section->flags & SEC_CODE) == 0)
4102 goto do_ifunc_pointer;
4103 goto bad_ifunc_reloc;
4106 relocation = (plt->output_section->vma
4107 + plt->output_offset + h->plt.offset);
4113 if (h->root.root.string)
4114 name = h->root.root.string;
4116 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4119 /* xgettext:c-format */
4120 (_("%B: relocation %s against STT_GNU_IFUNC "
4121 "symbol `%s' isn't supported"), input_bfd,
4123 bfd_set_error (bfd_error_bad_value);
4127 /* Generate dynamic relcoation only when there is a
4128 non-GOT reference in a shared object. */
4129 if ((bfd_link_pic (info) && h->non_got_ref)
4130 || h->plt.offset == (bfd_vma) -1)
4132 Elf_Internal_Rela outrel;
4137 /* Need a dynamic relocation to get the real function
4139 offset = _bfd_elf_section_offset (output_bfd,
4143 if (offset == (bfd_vma) -1
4144 || offset == (bfd_vma) -2)
4147 outrel.r_offset = (input_section->output_section->vma
4148 + input_section->output_offset
4151 if (h->dynindx == -1
4153 || bfd_link_executable (info))
4155 /* This symbol is resolved locally. */
4156 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4157 bfd_put_32 (output_bfd,
4158 (h->root.u.def.value
4159 + h->root.u.def.section->output_section->vma
4160 + h->root.u.def.section->output_offset),
4164 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4166 /* Dynamic relocations are stored in
4167 1. .rel.ifunc section in PIC object.
4168 2. .rel.got section in dynamic executable.
4169 3. .rel.iplt section in static executable. */
4170 if (bfd_link_pic (info))
4171 sreloc = htab->elf.irelifunc;
4172 else if (htab->elf.splt != NULL)
4173 sreloc = htab->elf.srelgot;
4175 sreloc = htab->elf.irelplt;
4176 elf_append_rel (output_bfd, sreloc, &outrel);
4178 /* If this reloc is against an external symbol, we
4179 do not want to fiddle with the addend. Otherwise,
4180 we need to include the symbol value so that it
4181 becomes an addend for the dynamic reloc. For an
4182 internal symbol, we have updated addend. */
4191 relocation -= (gotplt->output_section->vma
4192 + gotplt->output_offset);
4197 eh = (struct elf_i386_link_hash_entry *) h;
4198 resolved_to_zero = (eh != NULL
4199 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4206 /* Avoid optimizing _DYNAMIC since ld.so may use its
4207 link-time address. */
4208 if (h == htab->elf.hdynamic)
4211 if (bfd_link_pic (info))
4213 /* It is OK to convert mov to lea and convert indirect
4214 branch to direct branch. It is OK to convert adc,
4215 add, and, cmp, or, sbb, sub, test, xor only when PIC
4217 unsigned int opcode, addend;
4218 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
4221 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4222 if (opcode != 0x8b && opcode != 0xff)
4226 /* Resolve "mov GOT[(%reg)], %reg",
4227 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4228 and "binop foo@GOT[(%reg)], %reg". */
4230 || (h->plt.offset == (bfd_vma) -1
4231 && h->got.offset == (bfd_vma) -1)
4232 || htab->elf.sgotplt == NULL)
4235 offplt = (htab->elf.sgotplt->output_section->vma
4236 + htab->elf.sgotplt->output_offset);
4238 /* It is relative to .got.plt section. */
4239 if (h->got.offset != (bfd_vma) -1)
4240 /* Use GOT entry. Mask off the least significant bit in
4241 GOT offset which may be set by R_386_GOT32 processing
4243 relocation = (htab->elf.sgot->output_section->vma
4244 + htab->elf.sgot->output_offset
4245 + (h->got.offset & ~1) - offplt);
4247 /* Use GOTPLT entry. */
4248 relocation = (h->plt.offset / plt_entry_size - 1 + 3) * 4;
4250 if (!bfd_link_pic (info))
4252 /* If not PIC, add the .got.plt section address for
4253 baseless addressing. */
4255 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4256 if ((modrm & 0xc7) == 0x5)
4257 relocation += offplt;
4260 unresolved_reloc = FALSE;
4265 /* Relocation is to the entry for this symbol in the global
4267 if (htab->elf.sgot == NULL)
4274 off = h->got.offset;
4275 dyn = htab->elf.dynamic_sections_created;
4276 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4277 bfd_link_pic (info),
4279 || (bfd_link_pic (info)
4280 && SYMBOL_REFERENCES_LOCAL (info, h))
4281 || (ELF_ST_VISIBILITY (h->other)
4282 && h->root.type == bfd_link_hash_undefweak))
4284 /* This is actually a static link, or it is a
4285 -Bsymbolic link and the symbol is defined
4286 locally, or the symbol was forced to be local
4287 because of a version file. We must initialize
4288 this entry in the global offset table. Since the
4289 offset must always be a multiple of 4, we use the
4290 least significant bit to record whether we have
4291 initialized it already.
4293 When doing a dynamic link, we create a .rel.got
4294 relocation entry to initialize the value. This
4295 is done in the finish_dynamic_symbol routine. */
4300 bfd_put_32 (output_bfd, relocation,
4301 htab->elf.sgot->contents + off);
4306 unresolved_reloc = FALSE;
4310 if (local_got_offsets == NULL)
4313 off = local_got_offsets[r_symndx];
4315 /* The offset must always be a multiple of 4. We use
4316 the least significant bit to record whether we have
4317 already generated the necessary reloc. */
4322 bfd_put_32 (output_bfd, relocation,
4323 htab->elf.sgot->contents + off);
4325 if (bfd_link_pic (info))
4328 Elf_Internal_Rela outrel;
4330 s = htab->elf.srelgot;
4334 outrel.r_offset = (htab->elf.sgot->output_section->vma
4335 + htab->elf.sgot->output_offset
4337 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4338 elf_append_rel (output_bfd, s, &outrel);
4341 local_got_offsets[r_symndx] |= 1;
4345 if (off >= (bfd_vma) -2)
4348 relocation = (htab->elf.sgot->output_section->vma
4349 + htab->elf.sgot->output_offset + off);
4350 if (rel->r_offset > 1
4351 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
4352 && *(contents + rel->r_offset - 2) != 0x8d)
4354 if (bfd_link_pic (info))
4356 /* For PIC, disallow R_386_GOT32 without a base
4357 register, except for "lea foo@GOT, %reg", since
4358 we don't know what the GOT base is. */
4362 if (h == NULL || h->root.root.string == NULL)
4363 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4366 name = h->root.root.string;
4369 /* xgettext:c-format */
4370 (_("%B: direct GOT relocation %s against `%s' without base register can not be used when making a shared object"),
4371 input_bfd, howto->name, name);
4372 bfd_set_error (bfd_error_bad_value);
4378 /* Subtract the .got.plt section address only with a base
4380 relocation -= (htab->elf.sgotplt->output_section->vma
4381 + htab->elf.sgotplt->output_offset);
4387 /* Relocation is relative to the start of the global offset
4390 /* Check to make sure it isn't a protected function or data
4391 symbol for shared library since it may not be local when
4392 used as function address or with copy relocation. We also
4393 need to make sure that a symbol is referenced locally. */
4394 if (!bfd_link_executable (info) && h)
4396 if (!h->def_regular)
4400 switch (ELF_ST_VISIBILITY (h->other))
4403 v = _("hidden symbol");
4406 v = _("internal symbol");
4409 v = _("protected symbol");
4417 /* xgettext:c-format */
4418 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
4419 input_bfd, v, h->root.root.string);
4420 bfd_set_error (bfd_error_bad_value);
4423 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
4424 && (h->type == STT_FUNC
4425 || h->type == STT_OBJECT)
4426 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4429 /* xgettext:c-format */
4430 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
4432 h->type == STT_FUNC ? "function" : "data",
4433 h->root.root.string);
4434 bfd_set_error (bfd_error_bad_value);
4439 /* Note that sgot is not involved in this
4440 calculation. We always want the start of .got.plt. If we
4441 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4442 permitted by the ABI, we might have to change this
4444 relocation -= htab->elf.sgotplt->output_section->vma
4445 + htab->elf.sgotplt->output_offset;
4449 /* Use global offset table as symbol value. */
4450 relocation = htab->elf.sgotplt->output_section->vma
4451 + htab->elf.sgotplt->output_offset;
4452 unresolved_reloc = FALSE;
4456 /* Relocation is to the entry for this symbol in the
4457 procedure linkage table. */
4459 /* Resolve a PLT32 reloc against a local symbol directly,
4460 without using the procedure linkage table. */
4464 if ((h->plt.offset == (bfd_vma) -1
4465 && eh->plt_got.offset == (bfd_vma) -1)
4466 || htab->elf.splt == NULL)
4468 /* We didn't make a PLT entry for this symbol. This
4469 happens when statically linking PIC code, or when
4470 using -Bsymbolic. */
4474 if (h->plt.offset != (bfd_vma) -1)
4476 resolved_plt = htab->elf.splt;
4477 plt_offset = h->plt.offset;
4481 resolved_plt = htab->plt_got;
4482 plt_offset = eh->plt_got.offset;
4485 relocation = (resolved_plt->output_section->vma
4486 + resolved_plt->output_offset
4488 unresolved_reloc = FALSE;
4492 /* Set to symbol size. */
4493 relocation = st_size;
4498 if ((input_section->flags & SEC_ALLOC) == 0
4502 /* Copy dynamic function pointer relocations. Don't generate
4503 dynamic relocations against resolved undefined weak symbols
4504 in PIE, except for R_386_PC32. */
4505 if ((bfd_link_pic (info)
4507 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4508 && (!resolved_to_zero
4509 || r_type == R_386_PC32))
4510 || h->root.type != bfd_link_hash_undefweak))
4511 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
4512 || !SYMBOL_CALLS_LOCAL (info, h)))
4513 || (ELIMINATE_COPY_RELOCS
4514 && !bfd_link_pic (info)
4518 || eh->func_pointer_refcount > 0
4519 || (h->root.type == bfd_link_hash_undefweak
4520 && !resolved_to_zero))
4521 && ((h->def_dynamic && !h->def_regular)
4522 /* Undefined weak symbol is bound locally when
4524 || h->root.type == bfd_link_hash_undefweak)))
4526 Elf_Internal_Rela outrel;
4527 bfd_boolean skip, relocate;
4530 /* When generating a shared object, these relocations
4531 are copied into the output file to be resolved at run
4538 _bfd_elf_section_offset (output_bfd, info, input_section,
4540 if (outrel.r_offset == (bfd_vma) -1)
4542 else if (outrel.r_offset == (bfd_vma) -2)
4543 skip = TRUE, relocate = TRUE;
4544 outrel.r_offset += (input_section->output_section->vma
4545 + input_section->output_offset);
4548 memset (&outrel, 0, sizeof outrel);
4551 && (r_type == R_386_PC32
4552 || !(bfd_link_executable (info)
4553 || SYMBOLIC_BIND (info, h))
4554 || !h->def_regular))
4555 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4558 /* This symbol is local, or marked to become local. */
4560 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4563 sreloc = elf_section_data (input_section)->sreloc;
4565 if (sreloc == NULL || sreloc->contents == NULL)
4567 r = bfd_reloc_notsupported;
4568 goto check_relocation_error;
4571 elf_append_rel (output_bfd, sreloc, &outrel);
4573 /* If this reloc is against an external symbol, we do
4574 not want to fiddle with the addend. Otherwise, we
4575 need to include the symbol value so that it becomes
4576 an addend for the dynamic reloc. */
4583 if (!bfd_link_executable (info))
4585 Elf_Internal_Rela outrel;
4588 outrel.r_offset = rel->r_offset
4589 + input_section->output_section->vma
4590 + input_section->output_offset;
4591 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4592 sreloc = elf_section_data (input_section)->sreloc;
4595 elf_append_rel (output_bfd, sreloc, &outrel);
4600 case R_386_TLS_GOTDESC:
4601 case R_386_TLS_DESC_CALL:
4602 case R_386_TLS_IE_32:
4603 case R_386_TLS_GOTIE:
4604 tls_type = GOT_UNKNOWN;
4605 if (h == NULL && local_got_offsets)
4606 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
4608 tls_type = elf_i386_hash_entry(h)->tls_type;
4609 if (tls_type == GOT_TLS_IE)
4610 tls_type = GOT_TLS_IE_NEG;
4612 if (! elf_i386_tls_transition (info, input_bfd,
4613 input_section, contents,
4614 symtab_hdr, sym_hashes,
4615 &r_type, tls_type, rel,
4616 relend, h, r_symndx, TRUE))
4619 if (r_type == R_386_TLS_LE_32)
4621 BFD_ASSERT (! unresolved_reloc);
4622 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4627 /* GD->LE transition. */
4628 type = *(contents + rel->r_offset - 2);
4632 leal foo@tlsgd(,%ebx,1), %eax
4633 call ___tls_get_addr@PLT
4636 subl $foo@tpoff, %eax
4637 (6 byte form of subl). */
4638 roff = rel->r_offset + 5;
4643 leal foo@tlsgd(%ebx), %eax
4644 call ___tls_get_addr@PLT
4647 leal foo@tlsgd(%reg), %eax
4648 call *___tls_get_addr@GOT(%reg)
4649 which may be converted to
4650 addr32 call ___tls_get_addr
4652 movl %gs:0, %eax; subl $foo@tpoff, %eax
4653 (6 byte form of subl). */
4654 roff = rel->r_offset + 6;
4656 memcpy (contents + roff - 8,
4657 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4658 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4660 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
4665 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4667 /* GDesc -> LE transition.
4668 It's originally something like:
4669 leal x@tlsdesc(%ebx), %eax
4673 Registers other than %eax may be set up here. */
4678 roff = rel->r_offset;
4679 val = bfd_get_8 (input_bfd, contents + roff - 1);
4681 /* Now modify the instruction as appropriate. */
4682 /* aoliva FIXME: remove the above and xor the byte
4684 bfd_put_8 (output_bfd, val ^ 0x86,
4685 contents + roff - 1);
4686 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4690 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4692 /* GDesc -> LE transition.
4700 roff = rel->r_offset;
4701 bfd_put_8 (output_bfd, 0x66, contents + roff);
4702 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4705 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4709 /* IE->LE transition:
4710 Originally it can be one of:
4718 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4721 /* movl foo, %eax. */
4722 bfd_put_8 (output_bfd, 0xb8,
4723 contents + rel->r_offset - 1);
4729 type = bfd_get_8 (input_bfd,
4730 contents + rel->r_offset - 2);
4735 bfd_put_8 (output_bfd, 0xc7,
4736 contents + rel->r_offset - 2);
4737 bfd_put_8 (output_bfd,
4738 0xc0 | ((val >> 3) & 7),
4739 contents + rel->r_offset - 1);
4743 bfd_put_8 (output_bfd, 0x81,
4744 contents + rel->r_offset - 2);
4745 bfd_put_8 (output_bfd,
4746 0xc0 | ((val >> 3) & 7),
4747 contents + rel->r_offset - 1);
4754 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4755 contents + rel->r_offset);
4760 unsigned int val, type;
4762 /* {IE_32,GOTIE}->LE transition:
4763 Originally it can be one of:
4764 subl foo(%reg1), %reg2
4765 movl foo(%reg1), %reg2
4766 addl foo(%reg1), %reg2
4769 movl $foo, %reg2 (6 byte form)
4770 addl $foo, %reg2. */
4771 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4772 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4776 bfd_put_8 (output_bfd, 0xc7,
4777 contents + rel->r_offset - 2);
4778 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4779 contents + rel->r_offset - 1);
4781 else if (type == 0x2b)
4784 bfd_put_8 (output_bfd, 0x81,
4785 contents + rel->r_offset - 2);
4786 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4787 contents + rel->r_offset - 1);
4789 else if (type == 0x03)
4792 bfd_put_8 (output_bfd, 0x81,
4793 contents + rel->r_offset - 2);
4794 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4795 contents + rel->r_offset - 1);
4799 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4800 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4801 contents + rel->r_offset);
4803 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4804 contents + rel->r_offset);
4809 if (htab->elf.sgot == NULL)
4814 off = h->got.offset;
4815 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4819 if (local_got_offsets == NULL)
4822 off = local_got_offsets[r_symndx];
4823 offplt = local_tlsdesc_gotents[r_symndx];
4830 Elf_Internal_Rela outrel;
4834 if (htab->elf.srelgot == NULL)
4837 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4839 if (GOT_TLS_GDESC_P (tls_type))
4842 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4843 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4844 <= htab->elf.sgotplt->size);
4845 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4846 + htab->elf.sgotplt->output_offset
4848 + htab->sgotplt_jump_table_size);
4849 sreloc = htab->elf.srelplt;
4850 loc = sreloc->contents;
4851 loc += (htab->next_tls_desc_index++
4852 * sizeof (Elf32_External_Rel));
4853 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4854 <= sreloc->contents + sreloc->size);
4855 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4858 BFD_ASSERT (! unresolved_reloc);
4859 bfd_put_32 (output_bfd,
4860 relocation - elf_i386_dtpoff_base (info),
4861 htab->elf.sgotplt->contents + offplt
4862 + htab->sgotplt_jump_table_size + 4);
4866 bfd_put_32 (output_bfd, 0,
4867 htab->elf.sgotplt->contents + offplt
4868 + htab->sgotplt_jump_table_size + 4);
4872 sreloc = htab->elf.srelgot;
4874 outrel.r_offset = (htab->elf.sgot->output_section->vma
4875 + htab->elf.sgot->output_offset + off);
4877 if (GOT_TLS_GD_P (tls_type))
4878 dr_type = R_386_TLS_DTPMOD32;
4879 else if (GOT_TLS_GDESC_P (tls_type))
4881 else if (tls_type == GOT_TLS_IE_POS)
4882 dr_type = R_386_TLS_TPOFF;
4884 dr_type = R_386_TLS_TPOFF32;
4886 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4887 bfd_put_32 (output_bfd,
4888 relocation - elf_i386_dtpoff_base (info),
4889 htab->elf.sgot->contents + off);
4890 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4891 bfd_put_32 (output_bfd,
4892 elf_i386_dtpoff_base (info) - relocation,
4893 htab->elf.sgot->contents + off);
4894 else if (dr_type != R_386_TLS_DESC)
4895 bfd_put_32 (output_bfd, 0,
4896 htab->elf.sgot->contents + off);
4897 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4899 elf_append_rel (output_bfd, sreloc, &outrel);
4901 if (GOT_TLS_GD_P (tls_type))
4905 BFD_ASSERT (! unresolved_reloc);
4906 bfd_put_32 (output_bfd,
4907 relocation - elf_i386_dtpoff_base (info),
4908 htab->elf.sgot->contents + off + 4);
4912 bfd_put_32 (output_bfd, 0,
4913 htab->elf.sgot->contents + off + 4);
4914 outrel.r_info = ELF32_R_INFO (indx,
4915 R_386_TLS_DTPOFF32);
4916 outrel.r_offset += 4;
4917 elf_append_rel (output_bfd, sreloc, &outrel);
4920 else if (tls_type == GOT_TLS_IE_BOTH)
4922 bfd_put_32 (output_bfd,
4924 ? relocation - elf_i386_dtpoff_base (info)
4926 htab->elf.sgot->contents + off + 4);
4927 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4928 outrel.r_offset += 4;
4929 elf_append_rel (output_bfd, sreloc, &outrel);
4936 local_got_offsets[r_symndx] |= 1;
4939 if (off >= (bfd_vma) -2
4940 && ! GOT_TLS_GDESC_P (tls_type))
4942 if (r_type == R_386_TLS_GOTDESC
4943 || r_type == R_386_TLS_DESC_CALL)
4945 relocation = htab->sgotplt_jump_table_size + offplt;
4946 unresolved_reloc = FALSE;
4948 else if (r_type == ELF32_R_TYPE (rel->r_info))
4950 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4951 + htab->elf.sgotplt->output_offset;
4952 relocation = htab->elf.sgot->output_section->vma
4953 + htab->elf.sgot->output_offset + off - g_o_t;
4954 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4955 && tls_type == GOT_TLS_IE_BOTH)
4957 if (r_type == R_386_TLS_IE)
4958 relocation += g_o_t;
4959 unresolved_reloc = FALSE;
4961 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4963 unsigned int val, type;
4966 /* GD->IE transition. */
4967 type = *(contents + rel->r_offset - 2);
4968 val = *(contents + rel->r_offset - 1);
4972 leal foo@tlsgd(,%ebx,1), %eax
4973 call ___tls_get_addr@PLT
4976 subl $foo@gottpoff(%ebx), %eax. */
4978 roff = rel->r_offset - 3;
4983 leal foo@tlsgd(%ebx), %eax
4984 call ___tls_get_addr@PLT
4987 leal foo@tlsgd(%reg), %eax
4988 call *___tls_get_addr@GOT(%reg)
4989 which may be converted to
4990 addr32 call ___tls_get_addr
4993 subl $foo@gottpoff(%reg), %eax. */
4994 roff = rel->r_offset - 2;
4996 memcpy (contents + roff,
4997 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4998 contents[roff + 7] = 0x80 | (val & 7);
4999 /* If foo is used only with foo@gotntpoff(%reg) and
5000 foo@indntpoff, but not with foo@gottpoff(%reg), change
5001 subl $foo@gottpoff(%reg), %eax
5003 addl $foo@gotntpoff(%reg), %eax. */
5004 if (tls_type == GOT_TLS_IE_POS)
5005 contents[roff + 6] = 0x03;
5006 bfd_put_32 (output_bfd,
5007 htab->elf.sgot->output_section->vma
5008 + htab->elf.sgot->output_offset + off
5009 - htab->elf.sgotplt->output_section->vma
5010 - htab->elf.sgotplt->output_offset,
5011 contents + roff + 8);
5012 /* Skip R_386_PLT32 and R_386_GOT32X. */
5017 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
5019 /* GDesc -> IE transition.
5020 It's originally something like:
5021 leal x@tlsdesc(%ebx), %eax
5024 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
5026 movl x@gottpoff(%ebx), %eax # before negl %eax
5028 Registers other than %eax may be set up here. */
5032 /* First, make sure it's a leal adding ebx to a 32-bit
5033 offset into any register, although it's probably
5034 almost always going to be eax. */
5035 roff = rel->r_offset;
5037 /* Now modify the instruction as appropriate. */
5038 /* To turn a leal into a movl in the form we use it, it
5039 suffices to change the first byte from 0x8d to 0x8b.
5040 aoliva FIXME: should we decide to keep the leal, all
5041 we have to do is remove the statement below, and
5042 adjust the relaxation of R_386_TLS_DESC_CALL. */
5043 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
5045 if (tls_type == GOT_TLS_IE_BOTH)
5048 bfd_put_32 (output_bfd,
5049 htab->elf.sgot->output_section->vma
5050 + htab->elf.sgot->output_offset + off
5051 - htab->elf.sgotplt->output_section->vma
5052 - htab->elf.sgotplt->output_offset,
5056 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
5058 /* GDesc -> IE transition.
5066 depending on how we transformed the TLS_GOTDESC above.
5071 roff = rel->r_offset;
5073 /* Now modify the instruction as appropriate. */
5074 if (tls_type != GOT_TLS_IE_NEG)
5077 bfd_put_8 (output_bfd, 0x66, contents + roff);
5078 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5083 bfd_put_8 (output_bfd, 0xf7, contents + roff);
5084 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
5094 if (! elf_i386_tls_transition (info, input_bfd,
5095 input_section, contents,
5096 symtab_hdr, sym_hashes,
5097 &r_type, GOT_UNKNOWN, rel,
5098 relend, h, r_symndx, TRUE))
5101 if (r_type != R_386_TLS_LDM)
5103 /* LD->LE transition. Change
5104 leal foo@tlsldm(%ebx) %eax
5105 call ___tls_get_addr@PLT
5109 leal 0(%esi,1), %esi
5111 leal foo@tlsldm(%reg) %eax
5112 call *___tls_get_addr@GOT(%reg)
5113 which may be converted to
5114 addr32 call ___tls_get_addr
5117 leal 0(%esi), %esi */
5118 BFD_ASSERT (r_type == R_386_TLS_LE_32);
5119 if (*(contents + rel->r_offset + 4) == 0xff
5120 || *(contents + rel->r_offset + 4) == 0x67)
5121 memcpy (contents + rel->r_offset - 2,
5122 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
5124 memcpy (contents + rel->r_offset - 2,
5125 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
5126 /* Skip R_386_PC32/R_386_PLT32. */
5132 if (htab->elf.sgot == NULL)
5135 off = htab->tls_ldm_got.offset;
5140 Elf_Internal_Rela outrel;
5142 if (htab->elf.srelgot == NULL)
5145 outrel.r_offset = (htab->elf.sgot->output_section->vma
5146 + htab->elf.sgot->output_offset + off);
5148 bfd_put_32 (output_bfd, 0,
5149 htab->elf.sgot->contents + off);
5150 bfd_put_32 (output_bfd, 0,
5151 htab->elf.sgot->contents + off + 4);
5152 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
5153 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
5154 htab->tls_ldm_got.offset |= 1;
5156 relocation = htab->elf.sgot->output_section->vma
5157 + htab->elf.sgot->output_offset + off
5158 - htab->elf.sgotplt->output_section->vma
5159 - htab->elf.sgotplt->output_offset;
5160 unresolved_reloc = FALSE;
5163 case R_386_TLS_LDO_32:
5164 if (!bfd_link_executable (info)
5165 || (input_section->flags & SEC_CODE) == 0)
5166 relocation -= elf_i386_dtpoff_base (info);
5168 /* When converting LDO to LE, we must negate. */
5169 relocation = -elf_i386_tpoff (info, relocation);
5172 case R_386_TLS_LE_32:
5174 if (!bfd_link_executable (info))
5176 Elf_Internal_Rela outrel;
5179 outrel.r_offset = rel->r_offset
5180 + input_section->output_section->vma
5181 + input_section->output_offset;
5182 if (h != NULL && h->dynindx != -1)
5186 if (r_type == R_386_TLS_LE_32)
5187 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
5189 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
5190 sreloc = elf_section_data (input_section)->sreloc;
5193 elf_append_rel (output_bfd, sreloc, &outrel);
5196 else if (r_type == R_386_TLS_LE_32)
5197 relocation = elf_i386_dtpoff_base (info) - relocation;
5199 relocation -= elf_i386_dtpoff_base (info);
5201 else if (r_type == R_386_TLS_LE_32)
5202 relocation = elf_i386_tpoff (info, relocation);
5204 relocation = -elf_i386_tpoff (info, relocation);
5211 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5212 because such sections are not SEC_ALLOC and thus ld.so will
5213 not process them. */
5214 if (unresolved_reloc
5215 && !((input_section->flags & SEC_DEBUGGING) != 0
5217 && _bfd_elf_section_offset (output_bfd, info, input_section,
5218 rel->r_offset) != (bfd_vma) -1)
5221 /* xgettext:c-format */
5222 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5225 (long) rel->r_offset,
5227 h->root.root.string);
5232 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5233 contents, rel->r_offset,
5236 check_relocation_error:
5237 if (r != bfd_reloc_ok)
5242 name = h->root.root.string;
5245 name = bfd_elf_string_from_elf_section (input_bfd,
5246 symtab_hdr->sh_link,
5251 name = bfd_section_name (input_bfd, sec);
5254 if (r == bfd_reloc_overflow)
5255 (*info->callbacks->reloc_overflow)
5256 (info, (h ? &h->root : NULL), name, howto->name,
5257 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5261 /* xgettext:c-format */
5262 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5263 input_bfd, input_section,
5264 (long) rel->r_offset, name, (int) r);
5275 Elf_Internal_Shdr *rel_hdr;
5276 size_t deleted = rel - wrel;
5278 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5279 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5280 if (rel_hdr->sh_size == 0)
5282 /* It is too late to remove an empty reloc section. Leave
5284 ??? What is wrong with an empty section??? */
5285 rel_hdr->sh_size = rel_hdr->sh_entsize;
5288 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5289 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5290 input_section->reloc_count -= deleted;
5296 /* Finish up dynamic symbol handling. We set the contents of various
5297 dynamic sections here. */
5300 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
5301 struct bfd_link_info *info,
5302 struct elf_link_hash_entry *h,
5303 Elf_Internal_Sym *sym)
5305 struct elf_i386_link_hash_table *htab;
5306 unsigned plt_entry_size;
5307 const struct elf_i386_backend_data *abed;
5308 struct elf_i386_link_hash_entry *eh;
5309 bfd_boolean local_undefweak;
5311 htab = elf_i386_hash_table (info);
5315 abed = get_elf_i386_backend_data (output_bfd);
5316 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
5318 eh = (struct elf_i386_link_hash_entry *) h;
5320 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5321 resolved undefined weak symbols in executable so that their
5322 references have value 0 at run-time. */
5323 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
5327 if (h->plt.offset != (bfd_vma) -1)
5331 Elf_Internal_Rela rel;
5333 asection *plt, *gotplt, *relplt;
5335 /* When building a static executable, use .iplt, .igot.plt and
5336 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5337 if (htab->elf.splt != NULL)
5339 plt = htab->elf.splt;
5340 gotplt = htab->elf.sgotplt;
5341 relplt = htab->elf.srelplt;
5345 plt = htab->elf.iplt;
5346 gotplt = htab->elf.igotplt;
5347 relplt = htab->elf.irelplt;
5350 /* This symbol has an entry in the procedure linkage table. Set
5353 if ((h->dynindx == -1
5355 && !((h->forced_local || bfd_link_executable (info))
5357 && h->type == STT_GNU_IFUNC))
5363 /* Get the index in the procedure linkage table which
5364 corresponds to this symbol. This is the index of this symbol
5365 in all the symbols for which we are making plt entries. The
5366 first entry in the procedure linkage table is reserved.
5368 Get the offset into the .got table of the entry that
5369 corresponds to this function. Each .got entry is 4 bytes.
5370 The first three are reserved.
5372 For static executables, we don't reserve anything. */
5374 if (plt == htab->elf.splt)
5376 got_offset = h->plt.offset / plt_entry_size - 1;
5377 got_offset = (got_offset + 3) * 4;
5381 got_offset = h->plt.offset / plt_entry_size;
5382 got_offset = got_offset * 4;
5385 /* Fill in the entry in the procedure linkage table. */
5386 if (! bfd_link_pic (info))
5388 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
5389 abed->plt->plt_entry_size);
5390 bfd_put_32 (output_bfd,
5391 (gotplt->output_section->vma
5392 + gotplt->output_offset
5394 plt->contents + h->plt.offset
5395 + abed->plt->plt_got_offset);
5397 if (abed->is_vxworks)
5399 int s, k, reloc_index;
5401 /* Create the R_386_32 relocation referencing the GOT
5402 for this PLT entry. */
5404 /* S: Current slot number (zero-based). */
5405 s = ((h->plt.offset - abed->plt->plt_entry_size)
5406 / abed->plt->plt_entry_size);
5407 /* K: Number of relocations for PLTResolve. */
5408 if (bfd_link_pic (info))
5409 k = PLTRESOLVE_RELOCS_SHLIB;
5411 k = PLTRESOLVE_RELOCS;
5412 /* Skip the PLTresolve relocations, and the relocations for
5413 the other PLT slots. */
5414 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
5415 loc = (htab->srelplt2->contents + reloc_index
5416 * sizeof (Elf32_External_Rel));
5418 rel.r_offset = (htab->elf.splt->output_section->vma
5419 + htab->elf.splt->output_offset
5420 + h->plt.offset + 2),
5421 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5422 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5424 /* Create the R_386_32 relocation referencing the beginning of
5425 the PLT for this GOT entry. */
5426 rel.r_offset = (htab->elf.sgotplt->output_section->vma
5427 + htab->elf.sgotplt->output_offset
5429 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5430 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5431 loc + sizeof (Elf32_External_Rel));
5436 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
5437 abed->plt->plt_entry_size);
5438 bfd_put_32 (output_bfd, got_offset,
5439 plt->contents + h->plt.offset
5440 + abed->plt->plt_got_offset);
5443 /* Fill in the entry in the global offset table. Leave the entry
5444 as zero for undefined weak symbol in PIE. No PLT relocation
5445 against undefined weak symbol in PIE. */
5446 if (!local_undefweak)
5448 bfd_put_32 (output_bfd,
5449 (plt->output_section->vma
5450 + plt->output_offset
5452 + abed->plt->plt_lazy_offset),
5453 gotplt->contents + got_offset);
5455 /* Fill in the entry in the .rel.plt section. */
5456 rel.r_offset = (gotplt->output_section->vma
5457 + gotplt->output_offset
5459 if (h->dynindx == -1
5460 || ((bfd_link_executable (info)
5461 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5463 && h->type == STT_GNU_IFUNC))
5465 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5466 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5467 in the .got.plt section. */
5468 bfd_put_32 (output_bfd,
5469 (h->root.u.def.value
5470 + h->root.u.def.section->output_section->vma
5471 + h->root.u.def.section->output_offset),
5472 gotplt->contents + got_offset);
5473 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5474 /* R_386_IRELATIVE comes last. */
5475 plt_index = htab->next_irelative_index--;
5479 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
5480 plt_index = htab->next_jump_slot_index++;
5483 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
5484 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5486 /* Don't fill PLT entry for static executables. */
5487 if (plt == htab->elf.splt)
5489 bfd_put_32 (output_bfd,
5490 plt_index * sizeof (Elf32_External_Rel),
5491 plt->contents + h->plt.offset
5492 + abed->plt->plt_reloc_offset);
5493 bfd_put_32 (output_bfd, - (h->plt.offset
5494 + abed->plt->plt_plt_offset + 4),
5495 plt->contents + h->plt.offset
5496 + abed->plt->plt_plt_offset);
5500 else if (eh->plt_got.offset != (bfd_vma) -1)
5502 bfd_vma got_offset, plt_offset;
5503 asection *plt, *got, *gotplt;
5504 const bfd_byte *got_plt_entry;
5506 /* Offset of displacement of the indirect jump. */
5507 bfd_vma plt_got_offset = 2;
5509 /* Set the entry in the GOT procedure linkage table. */
5510 plt = htab->plt_got;
5511 got = htab->elf.sgot;
5512 gotplt = htab->elf.sgotplt;
5513 got_offset = h->got.offset;
5515 if (got_offset == (bfd_vma) -1
5521 /* Fill in the entry in the GOT procedure linkage table. */
5522 if (! bfd_link_pic (info))
5524 got_plt_entry = elf_i386_got_plt_entry;
5525 got_offset += got->output_section->vma + got->output_offset;
5529 got_plt_entry = elf_i386_pic_got_plt_entry;
5530 got_offset += (got->output_section->vma
5531 + got->output_offset
5532 - gotplt->output_section->vma
5533 - gotplt->output_offset);
5536 plt_offset = eh->plt_got.offset;
5537 memcpy (plt->contents + plt_offset, got_plt_entry,
5538 sizeof (elf_i386_got_plt_entry));
5539 bfd_put_32 (output_bfd, got_offset,
5540 plt->contents + plt_offset + plt_got_offset);
5543 if (!local_undefweak
5545 && (h->plt.offset != (bfd_vma) -1
5546 || eh->plt_got.offset != (bfd_vma) -1))
5548 /* Mark the symbol as undefined, rather than as defined in
5549 the .plt section. Leave the value if there were any
5550 relocations where pointer equality matters (this is a clue
5551 for the dynamic linker, to make function pointer
5552 comparisons work between an application and shared
5553 library), otherwise set it to zero. If a function is only
5554 called from a binary, there is no need to slow down
5555 shared libraries because of that. */
5556 sym->st_shndx = SHN_UNDEF;
5557 if (!h->pointer_equality_needed)
5561 /* Don't generate dynamic GOT relocation against undefined weak
5562 symbol in executable. */
5563 if (h->got.offset != (bfd_vma) -1
5564 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
5565 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
5566 && !local_undefweak)
5568 Elf_Internal_Rela rel;
5569 asection *relgot = htab->elf.srelgot;
5571 /* This symbol has an entry in the global offset table. Set it
5574 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
5577 rel.r_offset = (htab->elf.sgot->output_section->vma
5578 + htab->elf.sgot->output_offset
5579 + (h->got.offset & ~(bfd_vma) 1));
5581 /* If this is a static link, or it is a -Bsymbolic link and the
5582 symbol is defined locally or was forced to be local because
5583 of a version file, we just want to emit a RELATIVE reloc.
5584 The entry in the global offset table will already have been
5585 initialized in the relocate_section function. */
5587 && h->type == STT_GNU_IFUNC)
5589 if (h->plt.offset == (bfd_vma) -1)
5591 /* STT_GNU_IFUNC is referenced without PLT. */
5592 if (htab->elf.splt == NULL)
5594 /* use .rel[a].iplt section to store .got relocations
5595 in static executable. */
5596 relgot = htab->elf.irelplt;
5598 if (SYMBOL_REFERENCES_LOCAL (info, h))
5600 bfd_put_32 (output_bfd,
5601 (h->root.u.def.value
5602 + h->root.u.def.section->output_section->vma
5603 + h->root.u.def.section->output_offset),
5604 htab->elf.sgot->contents + h->got.offset);
5605 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5610 else if (bfd_link_pic (info))
5612 /* Generate R_386_GLOB_DAT. */
5619 if (!h->pointer_equality_needed)
5622 /* For non-shared object, we can't use .got.plt, which
5623 contains the real function addres if we need pointer
5624 equality. We load the GOT entry with the PLT entry. */
5625 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
5626 bfd_put_32 (output_bfd,
5627 (plt->output_section->vma
5628 + plt->output_offset + h->plt.offset),
5629 htab->elf.sgot->contents + h->got.offset);
5633 else if (bfd_link_pic (info)
5634 && SYMBOL_REFERENCES_LOCAL (info, h))
5636 BFD_ASSERT((h->got.offset & 1) != 0);
5637 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
5641 BFD_ASSERT((h->got.offset & 1) == 0);
5643 bfd_put_32 (output_bfd, (bfd_vma) 0,
5644 htab->elf.sgot->contents + h->got.offset);
5645 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
5648 elf_append_rel (output_bfd, relgot, &rel);
5653 Elf_Internal_Rela rel;
5656 /* This symbol needs a copy reloc. Set it up. */
5658 if (h->dynindx == -1
5659 || (h->root.type != bfd_link_hash_defined
5660 && h->root.type != bfd_link_hash_defweak)
5661 || htab->elf.srelbss == NULL
5662 || htab->elf.sreldynrelro == NULL)
5665 rel.r_offset = (h->root.u.def.value
5666 + h->root.u.def.section->output_section->vma
5667 + h->root.u.def.section->output_offset);
5668 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
5669 if (h->root.u.def.section == htab->elf.sdynrelro)
5670 s = htab->elf.sreldynrelro;
5672 s = htab->elf.srelbss;
5673 elf_append_rel (output_bfd, s, &rel);
5679 /* Finish up local dynamic symbol handling. We set the contents of
5680 various dynamic sections here. */
5683 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5685 struct elf_link_hash_entry *h
5686 = (struct elf_link_hash_entry *) *slot;
5687 struct bfd_link_info *info
5688 = (struct bfd_link_info *) inf;
5690 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5694 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5695 here since undefined weak symbol may not be dynamic and may not be
5696 called for elf_i386_finish_dynamic_symbol. */
5699 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5702 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5703 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5705 if (h->root.type != bfd_link_hash_undefweak
5706 || h->dynindx != -1)
5709 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5713 /* Used to decide how to sort relocs in an optimal manner for the
5714 dynamic linker, before writing them out. */
5716 static enum elf_reloc_type_class
5717 elf_i386_reloc_type_class (const struct bfd_link_info *info,
5718 const asection *rel_sec ATTRIBUTE_UNUSED,
5719 const Elf_Internal_Rela *rela)
5721 bfd *abfd = info->output_bfd;
5722 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5723 struct elf_link_hash_table *htab = elf_hash_table (info);
5725 if (htab->dynsym != NULL
5726 && htab->dynsym->contents != NULL)
5728 /* Check relocation against STT_GNU_IFUNC symbol if there are
5730 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5731 if (r_symndx != STN_UNDEF)
5733 Elf_Internal_Sym sym;
5734 if (!bed->s->swap_symbol_in (abfd,
5735 (htab->dynsym->contents
5736 + r_symndx * sizeof (Elf32_External_Sym)),
5740 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5741 return reloc_class_ifunc;
5745 switch (ELF32_R_TYPE (rela->r_info))
5747 case R_386_IRELATIVE:
5748 return reloc_class_ifunc;
5749 case R_386_RELATIVE:
5750 return reloc_class_relative;
5751 case R_386_JUMP_SLOT:
5752 return reloc_class_plt;
5754 return reloc_class_copy;
5756 return reloc_class_normal;
5760 /* Finish up the dynamic sections. */
5763 elf_i386_finish_dynamic_sections (bfd *output_bfd,
5764 struct bfd_link_info *info)
5766 struct elf_i386_link_hash_table *htab;
5769 const struct elf_i386_backend_data *abed;
5771 htab = elf_i386_hash_table (info);
5775 dynobj = htab->elf.dynobj;
5776 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5777 abed = get_elf_i386_backend_data (output_bfd);
5779 if (htab->elf.dynamic_sections_created)
5781 Elf32_External_Dyn *dyncon, *dynconend;
5783 if (sdyn == NULL || htab->elf.sgot == NULL)
5786 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5787 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5788 for (; dyncon < dynconend; dyncon++)
5790 Elf_Internal_Dyn dyn;
5793 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5798 if (abed->is_vxworks
5799 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5804 s = htab->elf.sgotplt;
5805 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5809 s = htab->elf.srelplt;
5810 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5814 s = htab->elf.srelplt;
5815 dyn.d_un.d_val = s->size;
5819 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5822 /* Fill in the first entry in the procedure linkage table. */
5823 if (htab->elf.splt && htab->elf.splt->size > 0)
5825 if (bfd_link_pic (info))
5827 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5828 abed->plt->plt0_entry_size);
5829 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5830 abed->plt0_pad_byte,
5831 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5835 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5836 abed->plt->plt0_entry_size);
5837 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5838 abed->plt0_pad_byte,
5839 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5840 bfd_put_32 (output_bfd,
5841 (htab->elf.sgotplt->output_section->vma
5842 + htab->elf.sgotplt->output_offset
5844 htab->elf.splt->contents
5845 + abed->plt->plt0_got1_offset);
5846 bfd_put_32 (output_bfd,
5847 (htab->elf.sgotplt->output_section->vma
5848 + htab->elf.sgotplt->output_offset
5850 htab->elf.splt->contents
5851 + abed->plt->plt0_got2_offset);
5853 if (abed->is_vxworks)
5855 Elf_Internal_Rela rel;
5857 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5858 On IA32 we use REL relocations so the addend goes in
5859 the PLT directly. */
5860 rel.r_offset = (htab->elf.splt->output_section->vma
5861 + htab->elf.splt->output_offset
5862 + abed->plt->plt0_got1_offset);
5863 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5864 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5865 htab->srelplt2->contents);
5866 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5867 rel.r_offset = (htab->elf.splt->output_section->vma
5868 + htab->elf.splt->output_offset
5869 + abed->plt->plt0_got2_offset);
5870 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5871 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5872 htab->srelplt2->contents +
5873 sizeof (Elf32_External_Rel));
5877 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5878 really seem like the right value. */
5879 elf_section_data (htab->elf.splt->output_section)
5880 ->this_hdr.sh_entsize = 4;
5882 /* Correct the .rel.plt.unloaded relocations. */
5883 if (abed->is_vxworks && !bfd_link_pic (info))
5885 int num_plts = (htab->elf.splt->size
5886 / abed->plt->plt_entry_size) - 1;
5889 p = htab->srelplt2->contents;
5890 if (bfd_link_pic (info))
5891 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5893 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5895 for (; num_plts; num_plts--)
5897 Elf_Internal_Rela rel;
5898 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5899 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5900 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5901 p += sizeof (Elf32_External_Rel);
5903 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5904 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5905 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5906 p += sizeof (Elf32_External_Rel);
5912 if (htab->elf.sgotplt)
5914 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5917 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5921 /* Fill in the first three entries in the global offset table. */
5922 if (htab->elf.sgotplt->size > 0)
5924 bfd_put_32 (output_bfd,
5926 : sdyn->output_section->vma + sdyn->output_offset),
5927 htab->elf.sgotplt->contents);
5928 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5929 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5932 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5935 /* Adjust .eh_frame for .plt section. */
5936 if (htab->plt_eh_frame != NULL
5937 && htab->plt_eh_frame->contents != NULL)
5939 if (htab->elf.splt != NULL
5940 && htab->elf.splt->size != 0
5941 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5942 && htab->elf.splt->output_section != NULL
5943 && htab->plt_eh_frame->output_section != NULL)
5945 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5946 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5947 + htab->plt_eh_frame->output_offset
5948 + PLT_FDE_START_OFFSET;
5949 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5950 htab->plt_eh_frame->contents
5951 + PLT_FDE_START_OFFSET);
5953 if (htab->plt_eh_frame->sec_info_type
5954 == SEC_INFO_TYPE_EH_FRAME)
5956 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5958 htab->plt_eh_frame->contents))
5963 /* Adjust .eh_frame for .plt.got section. */
5964 if (htab->plt_got_eh_frame != NULL
5965 && htab->plt_got_eh_frame->contents != NULL)
5967 if (htab->plt_got != NULL
5968 && htab->plt_got->size != 0
5969 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
5970 && htab->plt_got->output_section != NULL
5971 && htab->plt_got_eh_frame->output_section != NULL)
5973 bfd_vma plt_start = htab->plt_got->output_section->vma;
5974 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
5975 + htab->plt_got_eh_frame->output_offset
5976 + PLT_FDE_START_OFFSET;
5977 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5978 htab->plt_got_eh_frame->contents
5979 + PLT_FDE_START_OFFSET);
5981 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5983 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5984 htab->plt_got_eh_frame,
5985 htab->plt_got_eh_frame->contents))
5990 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5991 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5993 /* Fill PLT entries for undefined weak symbols in PIE. */
5994 if (bfd_link_pie (info))
5995 bfd_hash_traverse (&info->hash->table,
5996 elf_i386_pie_finish_undefweak_symbol,
6002 /* Fill PLT/GOT entries and allocate dynamic relocations for local
6003 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
6004 It has to be done before elf_link_sort_relocs is called so that
6005 dynamic relocations are properly sorted. */
6008 elf_i386_output_arch_local_syms
6009 (bfd *output_bfd ATTRIBUTE_UNUSED,
6010 struct bfd_link_info *info,
6011 void *flaginfo ATTRIBUTE_UNUSED,
6012 int (*func) (void *, const char *,
6015 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
6017 struct elf_i386_link_hash_table *htab = elf_i386_hash_table (info);
6021 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6022 htab_traverse (htab->loc_hash_table,
6023 elf_i386_finish_local_dynamic_symbol,
6029 /* Return an array of PLT entry symbol values. */
6032 elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
6035 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
6038 bfd_vma *plt_sym_val;
6040 bfd_byte *plt_contents;
6041 const struct elf_i386_backend_data *bed
6042 = get_elf_i386_backend_data (abfd);
6043 Elf_Internal_Shdr *hdr;
6045 /* Get the .plt section contents. */
6046 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
6047 if (plt_contents == NULL)
6049 if (!bfd_get_section_contents (abfd, (asection *) plt,
6050 plt_contents, 0, plt->size))
6053 free (plt_contents);
6057 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
6058 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
6061 hdr = &elf_section_data (relplt)->this_hdr;
6062 count = relplt->size / hdr->sh_entsize;
6064 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
6065 if (plt_sym_val == NULL)
6068 for (i = 0; i < count; i++)
6069 plt_sym_val[i] = -1;
6071 plt_offset = bed->plt->plt_entry_size;
6072 p = relplt->relocation;
6073 for (i = 0; i < count; i++, p++)
6077 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6078 if (p->howto == NULL)
6081 if (p->howto->type != R_386_JUMP_SLOT
6082 && p->howto->type != R_386_IRELATIVE)
6085 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
6086 + bed->plt->plt_reloc_offset));
6087 reloc_index /= sizeof (Elf32_External_Rel);
6088 if (reloc_index < count)
6089 plt_sym_val[reloc_index] = plt->vma + plt_offset;
6091 plt_offset += bed->plt->plt_entry_size;
6093 /* PR binutils/18437: Skip extra relocations in the .rel.plt
6095 if (plt_offset >= plt->size)
6099 free (plt_contents);
6104 /* Similar to _bfd_elf_get_synthetic_symtab. */
6107 elf_i386_get_synthetic_symtab (bfd *abfd,
6114 asection *plt = bfd_get_section_by_name (abfd, ".plt");
6115 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
6116 dynsymcount, dynsyms, ret,
6118 elf_i386_get_plt_sym_val);
6121 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6124 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
6126 if (h->plt.offset != (bfd_vma) -1
6128 && !h->pointer_equality_needed)
6131 return _bfd_elf_hash_symbol (h);
6134 #define TARGET_LITTLE_SYM i386_elf32_vec
6135 #define TARGET_LITTLE_NAME "elf32-i386"
6136 #define ELF_ARCH bfd_arch_i386
6137 #define ELF_TARGET_ID I386_ELF_DATA
6138 #define ELF_MACHINE_CODE EM_386
6139 #define ELF_MAXPAGESIZE 0x1000
6141 #define elf_backend_can_gc_sections 1
6142 #define elf_backend_can_refcount 1
6143 #define elf_backend_want_got_plt 1
6144 #define elf_backend_plt_readonly 1
6145 #define elf_backend_want_plt_sym 0
6146 #define elf_backend_got_header_size 12
6147 #define elf_backend_plt_alignment 4
6148 #define elf_backend_dtrel_excludes_plt 1
6149 #define elf_backend_extern_protected_data 1
6150 #define elf_backend_caches_rawsize 1
6151 #define elf_backend_want_dynrelro 1
6153 /* Support RELA for objdump of prelink objects. */
6154 #define elf_info_to_howto elf_i386_info_to_howto_rel
6155 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
6157 #define bfd_elf32_mkobject elf_i386_mkobject
6159 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
6160 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
6161 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
6162 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
6163 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
6165 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
6166 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
6167 #define elf_backend_check_relocs elf_i386_check_relocs
6168 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6169 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
6170 #define elf_backend_fake_sections elf_i386_fake_sections
6171 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
6172 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
6173 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
6174 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
6175 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
6176 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
6177 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
6178 #define elf_backend_relocate_section elf_i386_relocate_section
6179 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
6180 #define elf_backend_always_size_sections elf_i386_always_size_sections
6181 #define elf_backend_omit_section_dynsym \
6182 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
6183 #define elf_backend_hash_symbol elf_i386_hash_symbol
6184 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
6186 #include "elf32-target.h"
6188 /* FreeBSD support. */
6190 #undef TARGET_LITTLE_SYM
6191 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
6192 #undef TARGET_LITTLE_NAME
6193 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
6195 #define ELF_OSABI ELFOSABI_FREEBSD
6197 /* The kernel recognizes executables as valid only if they carry a
6198 "FreeBSD" label in the ELF header. So we put this label on all
6199 executables and (for simplicity) also all other object files. */
6202 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
6204 _bfd_elf_post_process_headers (abfd, info);
6206 #ifdef OLD_FREEBSD_ABI_LABEL
6208 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
6209 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
6210 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
6215 #undef elf_backend_post_process_headers
6216 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
6218 #define elf32_bed elf32_i386_fbsd_bed
6220 #undef elf_backend_add_symbol_hook
6222 #include "elf32-target.h"
6226 #undef TARGET_LITTLE_SYM
6227 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
6228 #undef TARGET_LITTLE_NAME
6229 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
6231 #undef elf_backend_post_process_headers
6233 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6234 objects won't be recognized. */
6238 #define elf32_bed elf32_i386_sol2_bed
6240 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6242 #undef elf_backend_static_tls_alignment
6243 #define elf_backend_static_tls_alignment 8
6245 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6247 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6249 #undef elf_backend_want_plt_sym
6250 #define elf_backend_want_plt_sym 1
6252 #undef elf_backend_strtab_flags
6253 #define elf_backend_strtab_flags SHF_STRINGS
6255 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
6256 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
6257 FALSE otherwise. ISECTION is the best guess matching section from the
6258 input bfd IBFD, but it might be NULL. */
6261 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
6262 bfd *obfd ATTRIBUTE_UNUSED,
6263 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
6264 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
6266 /* PR 19938: FIXME: Need to add code for setting the sh_info
6267 and sh_link fields of Solaris specific section types. */
6270 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
6271 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
6273 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
6275 The following values should be set:
6278 -----------------------------------------------------------------------------
6279 SHT_SUNW_ancillary The section header index of 0
6280 [0x6fffffee] the associated string table.
6282 SHT_SUNW_capinfo The section header index of For a dynamic object, the
6283 [0x6ffffff0] the associated symbol table. section header index of
6285 SHT_SUNW_capchain table,
6288 SHT_SUNW_symsort The section header index of 0
6289 [0x6ffffff1] the associated symbol table.
6291 SHT_SUNW_tlssort The section header index of 0
6292 [0x6ffffff2] the associated symbol table.
6294 SHT_SUNW_LDYNSYM The section header index of One greater than the
6295 [0x6ffffff3] the associated string table. symbol table index of the
6296 This index is the same string last local symbol,
6297 table used by the SHT_DYNSYM STB_LOCAL. Since
6298 section. SHT_SUNW_LDYNSYM only
6299 contains local symbols,
6300 sh_info is equivalent to
6301 the number of symbols in
6304 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
6305 [0x6ffffff5] the section header index of to named strings, the
6306 the associated section header index of
6307 SHT_SUNW_capinfo table, the associated string
6308 otherwise 0. table, otherwise 0.
6310 SHT_SUNW_move The section header index of 0
6311 [0x6ffffffa] the associated symbol table.
6316 SHT_SUNW_syminfo The section header index of The section header index
6317 [0x6ffffffc] the associated symbol table. of the associated
6320 SHT_SUNW_verdef The section header index of The number of version
6321 [0x6ffffffd] the associated string table. definitions within the
6324 SHT_SUNW_verneed The section header index of The number of version
6325 [0x6ffffffe] the associated string table. dependencies within the
6328 SHT_SUNW_versym The section header index of 0
6329 [0x6fffffff] the associated symbol table. */
6332 #undef elf_backend_copy_special_section_fields
6333 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
6335 #include "elf32-target.h"
6337 /* Intel MCU support. */
6340 elf32_iamcu_elf_object_p (bfd *abfd)
6342 /* Set the right machine number for an IAMCU elf32 file. */
6343 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
6347 #undef TARGET_LITTLE_SYM
6348 #define TARGET_LITTLE_SYM iamcu_elf32_vec
6349 #undef TARGET_LITTLE_NAME
6350 #define TARGET_LITTLE_NAME "elf32-iamcu"
6352 #define ELF_ARCH bfd_arch_iamcu
6354 #undef ELF_MACHINE_CODE
6355 #define ELF_MACHINE_CODE EM_IAMCU
6360 #define elf32_bed elf32_iamcu_bed
6362 #undef elf_backend_object_p
6363 #define elf_backend_object_p elf32_iamcu_elf_object_p
6365 #undef elf_backend_static_tls_alignment
6367 #undef elf_backend_want_plt_sym
6368 #define elf_backend_want_plt_sym 0
6370 #undef elf_backend_strtab_flags
6371 #undef elf_backend_copy_special_section_fields
6373 #include "elf32-target.h"
6375 /* Restore defaults. */
6377 #define ELF_ARCH bfd_arch_i386
6378 #undef ELF_MACHINE_CODE
6379 #define ELF_MACHINE_CODE EM_386
6381 /* Native Client support. */
6383 #undef TARGET_LITTLE_SYM
6384 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
6385 #undef TARGET_LITTLE_NAME
6386 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
6388 #define elf32_bed elf32_i386_nacl_bed
6390 #undef ELF_MAXPAGESIZE
6391 #define ELF_MAXPAGESIZE 0x10000
6393 /* Restore defaults. */
6395 #undef elf_backend_want_plt_sym
6396 #define elf_backend_want_plt_sym 0
6397 #undef elf_backend_post_process_headers
6398 #undef elf_backend_static_tls_alignment
6400 /* NaCl uses substantially different PLT entries for the same effects. */
6402 #undef elf_backend_plt_alignment
6403 #define elf_backend_plt_alignment 5
6404 #define NACL_PLT_ENTRY_SIZE 64
6405 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6407 static const bfd_byte elf_i386_nacl_plt0_entry[] =
6409 0xff, 0x35, /* pushl contents of address */
6410 0, 0, 0, 0, /* replaced with address of .got + 4. */
6411 0x8b, 0x0d, /* movl contents of address, %ecx */
6412 0, 0, 0, 0, /* replaced with address of .got + 8. */
6413 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6414 0xff, 0xe1 /* jmp *%ecx */
6417 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6419 0x8b, 0x0d, /* movl contents of address, %ecx */
6420 0, 0, 0, 0, /* replaced with GOT slot address. */
6421 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6422 0xff, 0xe1, /* jmp *%ecx */
6424 /* Pad to the next 32-byte boundary with nop instructions. */
6426 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6427 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6429 /* Lazy GOT entries point here (32-byte aligned). */
6430 0x68, /* pushl immediate */
6431 0, 0, 0, 0, /* replaced with reloc offset. */
6432 0xe9, /* jmp relative */
6433 0, 0, 0, 0, /* replaced with offset to .plt. */
6435 /* Pad to the next 32-byte boundary with nop instructions. */
6436 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6437 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6441 static const bfd_byte
6442 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
6444 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6445 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6446 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6447 0xff, 0xe1, /* jmp *%ecx */
6449 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6450 so pad to that size with nop instructions. */
6451 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
6454 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
6456 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6457 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6458 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6459 0xff, 0xe1, /* jmp *%ecx */
6461 /* Pad to the next 32-byte boundary with nop instructions. */
6463 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6464 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6466 /* Lazy GOT entries point here (32-byte aligned). */
6467 0x68, /* pushl immediate */
6468 0, 0, 0, 0, /* replaced with offset into relocation table. */
6469 0xe9, /* jmp relative */
6470 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6472 /* Pad to the next 32-byte boundary with nop instructions. */
6473 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6474 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6478 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
6480 #if (PLT_CIE_LENGTH != 20 \
6481 || PLT_FDE_LENGTH != 36 \
6482 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6483 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6484 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
6486 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6487 0, 0, 0, 0, /* CIE ID */
6488 1, /* CIE version */
6489 'z', 'R', 0, /* Augmentation string */
6490 1, /* Code alignment factor */
6491 0x7c, /* Data alignment factor: -4 */
6492 8, /* Return address column */
6493 1, /* Augmentation size */
6494 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6495 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
6496 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
6497 DW_CFA_nop, DW_CFA_nop,
6499 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6500 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
6501 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
6502 0, 0, 0, 0, /* .plt size goes here */
6503 0, /* Augmentation size */
6504 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
6505 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6506 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
6507 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6508 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6509 13, /* Block length */
6510 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
6511 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
6512 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6513 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
6514 DW_CFA_nop, DW_CFA_nop
6517 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
6519 elf_i386_nacl_plt0_entry, /* plt0_entry */
6520 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
6521 2, /* plt0_got1_offset */
6522 8, /* plt0_got2_offset */
6523 elf_i386_nacl_plt_entry, /* plt_entry */
6524 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6525 2, /* plt_got_offset */
6526 33, /* plt_reloc_offset */
6527 38, /* plt_plt_offset */
6528 32, /* plt_lazy_offset */
6529 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6530 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6531 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
6532 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
6533 NULL, /* eh_frame_plt_got */
6534 0, /* eh_frame_plt_got_size */
6537 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6539 &elf_i386_nacl_plt, /* plt */
6540 0x90, /* plt0_pad_byte: nop insn */
6545 elf32_i386_nacl_elf_object_p (bfd *abfd)
6547 /* Set the right machine number for a NaCl i386 ELF32 file. */
6548 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6552 #undef elf_backend_arch_data
6553 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6555 #undef elf_backend_object_p
6556 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6557 #undef elf_backend_modify_segment_map
6558 #define elf_backend_modify_segment_map nacl_modify_segment_map
6559 #undef elf_backend_modify_program_headers
6560 #define elf_backend_modify_program_headers nacl_modify_program_headers
6561 #undef elf_backend_final_write_processing
6562 #define elf_backend_final_write_processing nacl_final_write_processing
6564 #include "elf32-target.h"
6566 /* Restore defaults. */
6567 #undef elf_backend_object_p
6568 #undef elf_backend_modify_segment_map
6569 #undef elf_backend_modify_program_headers
6570 #undef elf_backend_final_write_processing
6572 /* VxWorks support. */
6574 #undef TARGET_LITTLE_SYM
6575 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6576 #undef TARGET_LITTLE_NAME
6577 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6579 #undef elf_backend_plt_alignment
6580 #define elf_backend_plt_alignment 4
6582 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6584 &elf_i386_plt, /* plt */
6585 0x90, /* plt0_pad_byte */
6589 #undef elf_backend_arch_data
6590 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6592 #undef elf_backend_relocs_compatible
6593 #undef elf_backend_add_symbol_hook
6594 #define elf_backend_add_symbol_hook \
6595 elf_vxworks_add_symbol_hook
6596 #undef elf_backend_link_output_symbol_hook
6597 #define elf_backend_link_output_symbol_hook \
6598 elf_vxworks_link_output_symbol_hook
6599 #undef elf_backend_emit_relocs
6600 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6601 #undef elf_backend_final_write_processing
6602 #define elf_backend_final_write_processing \
6603 elf_vxworks_final_write_processing
6604 #undef elf_backend_static_tls_alignment
6606 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6608 #undef elf_backend_want_plt_sym
6609 #define elf_backend_want_plt_sym 1
6612 #define elf32_bed elf32_i386_vxworks_bed
6614 #include "elf32-target.h"