1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2017 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
32 #include "opcode/i386.h"
34 /* 386 uses REL relocations instead of RELA. */
39 static reloc_howto_type elf_howto_table[]=
41 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
42 bfd_elf_generic_reloc, "R_386_NONE",
43 TRUE, 0x00000000, 0x00000000, FALSE),
44 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
45 bfd_elf_generic_reloc, "R_386_32",
46 TRUE, 0xffffffff, 0xffffffff, FALSE),
47 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
48 bfd_elf_generic_reloc, "R_386_PC32",
49 TRUE, 0xffffffff, 0xffffffff, TRUE),
50 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
51 bfd_elf_generic_reloc, "R_386_GOT32",
52 TRUE, 0xffffffff, 0xffffffff, FALSE),
53 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
54 bfd_elf_generic_reloc, "R_386_PLT32",
55 TRUE, 0xffffffff, 0xffffffff, TRUE),
56 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
57 bfd_elf_generic_reloc, "R_386_COPY",
58 TRUE, 0xffffffff, 0xffffffff, FALSE),
59 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
61 TRUE, 0xffffffff, 0xffffffff, FALSE),
62 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
64 TRUE, 0xffffffff, 0xffffffff, FALSE),
65 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_386_RELATIVE",
67 TRUE, 0xffffffff, 0xffffffff, FALSE),
68 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_386_GOTOFF",
70 TRUE, 0xffffffff, 0xffffffff, FALSE),
71 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_386_GOTPC",
73 TRUE, 0xffffffff, 0xffffffff, TRUE),
75 /* We have a gap in the reloc numbers here.
76 R_386_standard counts the number up to this point, and
77 R_386_ext_offset is the value to subtract from a reloc type of
78 R_386_16 thru R_386_PC8 to form an index into this table. */
79 #define R_386_standard (R_386_GOTPC + 1)
80 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
82 /* These relocs are a GNU extension. */
83 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
85 TRUE, 0xffffffff, 0xffffffff, FALSE),
86 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_386_TLS_IE",
88 TRUE, 0xffffffff, 0xffffffff, FALSE),
89 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
91 TRUE, 0xffffffff, 0xffffffff, FALSE),
92 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_386_TLS_LE",
94 TRUE, 0xffffffff, 0xffffffff, FALSE),
95 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_386_TLS_GD",
97 TRUE, 0xffffffff, 0xffffffff, FALSE),
98 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_386_TLS_LDM",
100 TRUE, 0xffffffff, 0xffffffff, FALSE),
101 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_386_16",
103 TRUE, 0xffff, 0xffff, FALSE),
104 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_386_PC16",
106 TRUE, 0xffff, 0xffff, TRUE),
107 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_386_8",
109 TRUE, 0xff, 0xff, FALSE),
110 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
111 bfd_elf_generic_reloc, "R_386_PC8",
112 TRUE, 0xff, 0xff, TRUE),
114 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
115 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
116 /* These are common with Solaris TLS implementation. */
117 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
119 TRUE, 0xffffffff, 0xffffffff, FALSE),
120 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
122 TRUE, 0xffffffff, 0xffffffff, FALSE),
123 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
125 TRUE, 0xffffffff, 0xffffffff, FALSE),
126 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
128 TRUE, 0xffffffff, 0xffffffff, FALSE),
129 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
131 TRUE, 0xffffffff, 0xffffffff, FALSE),
132 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
134 TRUE, 0xffffffff, 0xffffffff, FALSE),
135 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
136 bfd_elf_generic_reloc, "R_386_SIZE32",
137 TRUE, 0xffffffff, 0xffffffff, FALSE),
138 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
140 TRUE, 0xffffffff, 0xffffffff, FALSE),
141 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
142 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
144 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_386_TLS_DESC",
146 TRUE, 0xffffffff, 0xffffffff, FALSE),
147 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_386_IRELATIVE",
149 TRUE, 0xffffffff, 0xffffffff, FALSE),
150 HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_386_GOT32X",
152 TRUE, 0xffffffff, 0xffffffff, FALSE),
155 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
156 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
158 /* GNU extension to record C++ vtable hierarchy. */
159 HOWTO (R_386_GNU_VTINHERIT, /* type */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
163 FALSE, /* pc_relative */
165 complain_overflow_dont, /* complain_on_overflow */
166 NULL, /* special_function */
167 "R_386_GNU_VTINHERIT", /* name */
168 FALSE, /* partial_inplace */
171 FALSE), /* pcrel_offset */
173 /* GNU extension to record C++ vtable member usage. */
174 HOWTO (R_386_GNU_VTENTRY, /* type */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
178 FALSE, /* pc_relative */
180 complain_overflow_dont, /* complain_on_overflow */
181 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
182 "R_386_GNU_VTENTRY", /* name */
183 FALSE, /* partial_inplace */
186 FALSE) /* pcrel_offset */
188 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
192 #ifdef DEBUG_GEN_RELOC
194 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
199 static reloc_howto_type *
200 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
201 bfd_reloc_code_real_type code)
206 TRACE ("BFD_RELOC_NONE");
207 return &elf_howto_table[R_386_NONE];
210 TRACE ("BFD_RELOC_32");
211 return &elf_howto_table[R_386_32];
214 TRACE ("BFD_RELOC_CTOR");
215 return &elf_howto_table[R_386_32];
217 case BFD_RELOC_32_PCREL:
218 TRACE ("BFD_RELOC_PC32");
219 return &elf_howto_table[R_386_PC32];
221 case BFD_RELOC_386_GOT32:
222 TRACE ("BFD_RELOC_386_GOT32");
223 return &elf_howto_table[R_386_GOT32];
225 case BFD_RELOC_386_PLT32:
226 TRACE ("BFD_RELOC_386_PLT32");
227 return &elf_howto_table[R_386_PLT32];
229 case BFD_RELOC_386_COPY:
230 TRACE ("BFD_RELOC_386_COPY");
231 return &elf_howto_table[R_386_COPY];
233 case BFD_RELOC_386_GLOB_DAT:
234 TRACE ("BFD_RELOC_386_GLOB_DAT");
235 return &elf_howto_table[R_386_GLOB_DAT];
237 case BFD_RELOC_386_JUMP_SLOT:
238 TRACE ("BFD_RELOC_386_JUMP_SLOT");
239 return &elf_howto_table[R_386_JUMP_SLOT];
241 case BFD_RELOC_386_RELATIVE:
242 TRACE ("BFD_RELOC_386_RELATIVE");
243 return &elf_howto_table[R_386_RELATIVE];
245 case BFD_RELOC_386_GOTOFF:
246 TRACE ("BFD_RELOC_386_GOTOFF");
247 return &elf_howto_table[R_386_GOTOFF];
249 case BFD_RELOC_386_GOTPC:
250 TRACE ("BFD_RELOC_386_GOTPC");
251 return &elf_howto_table[R_386_GOTPC];
253 /* These relocs are a GNU extension. */
254 case BFD_RELOC_386_TLS_TPOFF:
255 TRACE ("BFD_RELOC_386_TLS_TPOFF");
256 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
258 case BFD_RELOC_386_TLS_IE:
259 TRACE ("BFD_RELOC_386_TLS_IE");
260 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
262 case BFD_RELOC_386_TLS_GOTIE:
263 TRACE ("BFD_RELOC_386_TLS_GOTIE");
264 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
266 case BFD_RELOC_386_TLS_LE:
267 TRACE ("BFD_RELOC_386_TLS_LE");
268 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
270 case BFD_RELOC_386_TLS_GD:
271 TRACE ("BFD_RELOC_386_TLS_GD");
272 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
274 case BFD_RELOC_386_TLS_LDM:
275 TRACE ("BFD_RELOC_386_TLS_LDM");
276 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
279 TRACE ("BFD_RELOC_16");
280 return &elf_howto_table[R_386_16 - R_386_ext_offset];
282 case BFD_RELOC_16_PCREL:
283 TRACE ("BFD_RELOC_16_PCREL");
284 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
287 TRACE ("BFD_RELOC_8");
288 return &elf_howto_table[R_386_8 - R_386_ext_offset];
290 case BFD_RELOC_8_PCREL:
291 TRACE ("BFD_RELOC_8_PCREL");
292 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
294 /* Common with Sun TLS implementation. */
295 case BFD_RELOC_386_TLS_LDO_32:
296 TRACE ("BFD_RELOC_386_TLS_LDO_32");
297 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
299 case BFD_RELOC_386_TLS_IE_32:
300 TRACE ("BFD_RELOC_386_TLS_IE_32");
301 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
303 case BFD_RELOC_386_TLS_LE_32:
304 TRACE ("BFD_RELOC_386_TLS_LE_32");
305 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
307 case BFD_RELOC_386_TLS_DTPMOD32:
308 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
309 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
311 case BFD_RELOC_386_TLS_DTPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
313 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
315 case BFD_RELOC_386_TLS_TPOFF32:
316 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
317 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
319 case BFD_RELOC_SIZE32:
320 TRACE ("BFD_RELOC_SIZE32");
321 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
323 case BFD_RELOC_386_TLS_GOTDESC:
324 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
325 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
327 case BFD_RELOC_386_TLS_DESC_CALL:
328 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
329 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
331 case BFD_RELOC_386_TLS_DESC:
332 TRACE ("BFD_RELOC_386_TLS_DESC");
333 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
335 case BFD_RELOC_386_IRELATIVE:
336 TRACE ("BFD_RELOC_386_IRELATIVE");
337 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
339 case BFD_RELOC_386_GOT32X:
340 TRACE ("BFD_RELOC_386_GOT32X");
341 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
343 case BFD_RELOC_VTABLE_INHERIT:
344 TRACE ("BFD_RELOC_VTABLE_INHERIT");
345 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
347 case BFD_RELOC_VTABLE_ENTRY:
348 TRACE ("BFD_RELOC_VTABLE_ENTRY");
349 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
359 static reloc_howto_type *
360 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
365 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
366 if (elf_howto_table[i].name != NULL
367 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
368 return &elf_howto_table[i];
373 static reloc_howto_type *
374 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
378 if ((indx = r_type) >= R_386_standard
379 && ((indx = r_type - R_386_ext_offset) - R_386_standard
380 >= R_386_ext - R_386_standard)
381 && ((indx = r_type - R_386_tls_offset) - R_386_ext
382 >= R_386_ext2 - R_386_ext)
383 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
384 >= R_386_vt - R_386_ext2))
386 /* xgettext:c-format */
387 _bfd_error_handler (_("%B: invalid relocation type %d"),
391 /* PR 17512: file: 0f67f69d. */
392 if (elf_howto_table [indx].type != r_type)
394 return &elf_howto_table[indx];
398 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
400 Elf_Internal_Rela *dst)
402 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
403 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
406 /* Return whether a symbol name implies a local label. The UnixWare
407 2.1 cc generates temporary symbols that start with .X, so we
408 recognize them here. FIXME: do other SVR4 compilers also use .X?.
409 If so, we should move the .X recognition into
410 _bfd_elf_is_local_label_name. */
413 elf_i386_is_local_label_name (bfd *abfd, const char *name)
415 if (name[0] == '.' && name[1] == 'X')
418 return _bfd_elf_is_local_label_name (abfd, name);
421 /* Support for core dump NOTE sections. */
424 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
429 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
431 int pr_version = bfd_get_32 (abfd, note->descdata);
437 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
440 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
444 size = bfd_get_32 (abfd, note->descdata + 8);
448 switch (note->descsz)
453 case 144: /* Linux/i386 */
455 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
458 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
468 /* Make a ".reg/999" section. */
469 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
470 size, note->descpos + offset);
474 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
476 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
478 int pr_version = bfd_get_32 (abfd, note->descdata);
483 elf_tdata (abfd)->core->program
484 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
485 elf_tdata (abfd)->core->command
486 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
490 switch (note->descsz)
495 case 124: /* Linux/i386 elf_prpsinfo. */
496 elf_tdata (abfd)->core->pid
497 = bfd_get_32 (abfd, note->descdata + 12);
498 elf_tdata (abfd)->core->program
499 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
500 elf_tdata (abfd)->core->command
501 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
505 /* Note that for some reason, a spurious space is tacked
506 onto the end of the args in some (at least one anyway)
507 implementations, so strip it off if it exists. */
509 char *command = elf_tdata (abfd)->core->command;
510 int n = strlen (command);
512 if (0 < n && command[n - 1] == ' ')
513 command[n - 1] = '\0';
519 /* Functions for the i386 ELF linker.
521 In order to gain some understanding of code in this file without
522 knowing all the intricate details of the linker, note the
525 Functions named elf_i386_* are called by external routines, other
526 functions are only called locally. elf_i386_* functions appear
527 in this file more or less in the order in which they are called
528 from external routines. eg. elf_i386_check_relocs is called
529 early in the link process, elf_i386_finish_dynamic_sections is
530 one of the last functions. */
533 /* The name of the dynamic interpreter. This is put in the .interp
536 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
538 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
539 copying dynamic variables from a shared lib into an app's dynbss
540 section, and instead use a dynamic relocation to point into the
542 #define ELIMINATE_COPY_RELOCS 1
544 /* The size in bytes of an entry in the lazy procedure linkage table. */
546 #define LAZY_PLT_ENTRY_SIZE 16
548 /* The size in bytes of an entry in the non-lazy procedure linkage
551 #define NON_LAZY_PLT_ENTRY_SIZE 8
553 /* The first entry in an absolute lazy procedure linkage table looks
554 like this. See the SVR4 ABI i386 supplement to see how this works.
555 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
557 static const bfd_byte elf_i386_lazy_plt0_entry[12] =
559 0xff, 0x35, /* pushl contents of address */
560 0, 0, 0, 0, /* replaced with address of .got + 4. */
561 0xff, 0x25, /* jmp indirect */
562 0, 0, 0, 0 /* replaced with address of .got + 8. */
565 /* Subsequent entries in an absolute lazy procedure linkage table look
568 static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
570 0xff, 0x25, /* jmp indirect */
571 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
572 0x68, /* pushl immediate */
573 0, 0, 0, 0, /* replaced with offset into relocation table. */
574 0xe9, /* jmp relative */
575 0, 0, 0, 0 /* replaced with offset to start of .plt. */
578 /* The first entry in a PIC lazy procedure linkage table look like
579 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
580 lazy_plt->plt0_pad_byte. */
582 static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
584 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
585 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
588 /* Subsequent entries in a PIC lazy procedure linkage table look like
591 static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
593 0xff, 0xa3, /* jmp *offset(%ebx) */
594 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
595 0x68, /* pushl immediate */
596 0, 0, 0, 0, /* replaced with offset into relocation table. */
597 0xe9, /* jmp relative */
598 0, 0, 0, 0 /* replaced with offset to start of .plt. */
601 /* Entries in the non-lazy procedure linkage table look like this. */
603 static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
605 0xff, 0x25, /* jmp indirect */
606 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
607 0x66, 0x90 /* xchg %ax,%ax */
610 /* Entries in the PIC non-lazy procedure linkage table look like
613 static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
615 0xff, 0xa3, /* jmp *offset(%ebx) */
616 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
617 0x66, 0x90 /* xchg %ax,%ax */
620 /* .eh_frame covering the lazy .plt section. */
622 static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
624 #define PLT_CIE_LENGTH 20
625 #define PLT_FDE_LENGTH 36
626 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
627 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
628 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
629 0, 0, 0, 0, /* CIE ID */
631 'z', 'R', 0, /* Augmentation string */
632 1, /* Code alignment factor */
633 0x7c, /* Data alignment factor */
634 8, /* Return address column */
635 1, /* Augmentation size */
636 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
637 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
638 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
639 DW_CFA_nop, DW_CFA_nop,
641 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
642 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
643 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
644 0, 0, 0, 0, /* .plt size goes here */
645 0, /* Augmentation size */
646 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
647 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
648 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
649 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
650 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
651 11, /* Block length */
652 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
653 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
654 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
655 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
656 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
659 /* .eh_frame covering the non-lazy .plt section. */
661 static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
663 #define PLT_GOT_FDE_LENGTH 16
664 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
665 0, 0, 0, 0, /* CIE ID */
667 'z', 'R', 0, /* Augmentation string */
668 1, /* Code alignment factor */
669 0x7c, /* Data alignment factor */
670 8, /* Return address column */
671 1, /* Augmentation size */
672 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
673 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
674 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
675 DW_CFA_nop, DW_CFA_nop,
677 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
678 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
679 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
680 0, 0, 0, 0, /* non-lazy .plt size goes here */
681 0, /* Augmentation size */
682 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
685 struct elf_i386_lazy_plt_layout
687 /* The first entry in an absolute lazy procedure linkage table looks
689 const bfd_byte *plt0_entry;
690 unsigned int plt0_entry_size;
692 /* Offsets into plt0_entry that are to be replaced with GOT[1] and
694 unsigned int plt0_got1_offset;
695 unsigned int plt0_got2_offset;
697 /* Later entries in an absolute lazy procedure linkage table look
699 const bfd_byte *plt_entry;
700 unsigned int plt_entry_size;
702 /* Offsets into plt_entry that are to be replaced with... */
703 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
704 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
705 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
707 /* Offset into plt_entry where the initial value of the GOT entry
709 unsigned int plt_lazy_offset;
711 /* The first entry in a PIC lazy procedure linkage table looks like
713 const bfd_byte *pic_plt0_entry;
715 /* Subsequent entries in a PIC lazy procedure linkage table look
717 const bfd_byte *pic_plt_entry;
719 /* .eh_frame covering the lazy .plt section. */
720 const bfd_byte *eh_frame_plt;
721 unsigned int eh_frame_plt_size;
724 struct elf_i386_non_lazy_plt_layout
726 /* Entries in an absolute non-lazy procedure linkage table look like
728 const bfd_byte *plt_entry;
729 /* Entries in a PIC non-lazy procedure linkage table look like this. */
730 const bfd_byte *pic_plt_entry;
732 unsigned int plt_entry_size;
734 /* Offsets into plt_entry that are to be replaced with... */
735 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
737 /* .eh_frame covering the non-lazy .plt section. */
738 const bfd_byte *eh_frame_plt;
739 unsigned int eh_frame_plt_size;
742 struct elf_i386_plt_layout
744 /* The first entry in a lazy procedure linkage table looks like this. */
745 const bfd_byte *plt0_entry;
746 /* Entries in a procedure linkage table look like this. */
747 const bfd_byte *plt_entry;
748 unsigned int plt_entry_size;
751 unsigned int has_plt0;
753 /* Offsets into plt_entry that are to be replaced with... */
754 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
756 /* .eh_frame covering the .plt section. */
757 const bfd_byte *eh_frame_plt;
758 unsigned int eh_frame_plt_size;
761 /* These are the standard parameters. */
762 static const struct elf_i386_lazy_plt_layout elf_i386_lazy_plt =
764 elf_i386_lazy_plt0_entry, /* plt0_entry */
765 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
766 2, /* plt0_got1_offset */
767 8, /* plt0_got2_offset */
768 elf_i386_lazy_plt_entry, /* plt_entry */
769 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
770 2, /* plt_got_offset */
771 7, /* plt_reloc_offset */
772 12, /* plt_plt_offset */
773 6, /* plt_lazy_offset */
774 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
775 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
776 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
777 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
780 static const struct elf_i386_non_lazy_plt_layout elf_i386_non_lazy_plt =
782 elf_i386_non_lazy_plt_entry, /* plt_entry */
783 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
784 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
785 2, /* plt_got_offset */
786 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
787 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
791 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
792 for the PLTResolve stub and then for each PLT entry. */
793 #define PLTRESOLVE_RELOCS_SHLIB 0
794 #define PLTRESOLVE_RELOCS 2
795 #define PLT_NON_JUMP_SLOT_RELOCS 2
797 /* Architecture-specific backend data for i386. */
799 struct elf_i386_backend_data
801 /* Value used to fill the unused bytes of the first PLT entry. */
802 bfd_byte plt0_pad_byte;
813 #define get_elf_i386_backend_data(abfd) \
814 ((const struct elf_i386_backend_data *) \
815 get_elf_backend_data (abfd)->arch_data)
817 /* These are the standard parameters. */
818 static const struct elf_i386_backend_data elf_i386_arch_bed =
820 0, /* plt0_pad_byte */
824 #define elf_backend_arch_data &elf_i386_arch_bed
826 /* Is a undefined weak symbol which is resolved to 0. Reference to an
827 undefined weak symbol is resolved to 0 when building executable if
829 1. Has non-GOT/non-PLT relocations in text section. Or
830 2. Has no GOT/PLT relocation.
832 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
833 ((EH)->elf.root.type == bfd_link_hash_undefweak \
834 && bfd_link_executable (INFO) \
835 && (elf_i386_hash_table (INFO)->interp == NULL \
837 || (EH)->has_non_got_reloc \
838 || !(INFO)->dynamic_undefined_weak))
840 /* i386 ELF linker hash entry. */
842 struct elf_i386_link_hash_entry
844 struct elf_link_hash_entry elf;
846 /* Track dynamic relocs copied for this symbol. */
847 struct elf_dyn_relocs *dyn_relocs;
849 #define GOT_UNKNOWN 0
853 #define GOT_TLS_IE_POS 5
854 #define GOT_TLS_IE_NEG 6
855 #define GOT_TLS_IE_BOTH 7
856 #define GOT_TLS_GDESC 8
857 #define GOT_TLS_GD_BOTH_P(type) \
858 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
859 #define GOT_TLS_GD_P(type) \
860 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
861 #define GOT_TLS_GDESC_P(type) \
862 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
863 #define GOT_TLS_GD_ANY_P(type) \
864 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
865 unsigned char tls_type;
867 /* Symbol is referenced by R_386_GOTOFF relocation. */
868 unsigned int gotoff_ref : 1;
870 /* Symbol has GOT or PLT relocations. */
871 unsigned int has_got_reloc : 1;
873 /* Symbol has non-GOT/non-PLT relocations in text sections. */
874 unsigned int has_non_got_reloc : 1;
876 /* Don't call finish_dynamic_symbol on this symbol. */
877 unsigned int no_finish_dynamic_symbol : 1;
879 /* 0: symbol isn't ___tls_get_addr.
880 1: symbol is ___tls_get_addr.
881 2: symbol is unknown. */
882 unsigned int tls_get_addr : 2;
884 /* Reference count of C/C++ function pointer relocations in read-write
885 section which can be resolved at run-time. */
886 bfd_signed_vma func_pointer_refcount;
888 /* Information about the GOT PLT entry. Filled when there are both
889 GOT and PLT relocations against the same function. */
890 union gotplt_union plt_got;
892 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
893 starting at the end of the jump table. */
897 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
899 struct elf_i386_obj_tdata
901 struct elf_obj_tdata root;
903 /* tls_type for each local got entry. */
904 char *local_got_tls_type;
906 /* GOTPLT entries for TLS descriptors. */
907 bfd_vma *local_tlsdesc_gotent;
910 #define elf_i386_tdata(abfd) \
911 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
913 #define elf_i386_local_got_tls_type(abfd) \
914 (elf_i386_tdata (abfd)->local_got_tls_type)
916 #define elf_i386_local_tlsdesc_gotent(abfd) \
917 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
919 #define is_i386_elf(bfd) \
920 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
921 && elf_tdata (bfd) != NULL \
922 && elf_object_id (bfd) == I386_ELF_DATA)
925 elf_i386_mkobject (bfd *abfd)
927 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
931 /* i386 ELF linker hash table. */
933 struct elf_i386_link_hash_table
935 struct elf_link_hash_table elf;
937 /* Short-cuts to get to dynamic linker sections. */
939 asection *plt_eh_frame;
941 asection *plt_got_eh_frame;
943 /* Parameters describing PLT generation. */
944 struct elf_i386_plt_layout plt;
946 /* Parameters describing lazy PLT generation. */
947 const struct elf_i386_lazy_plt_layout *lazy_plt;
949 /* Parameters describing non-lazy PLT generation. */
950 const struct elf_i386_non_lazy_plt_layout *non_lazy_plt;
954 bfd_signed_vma refcount;
958 /* The amount of space used by the reserved portion of the sgotplt
959 section, plus whatever space is used by the jump slots. */
960 bfd_vma sgotplt_jump_table_size;
962 /* Small local sym cache. */
963 struct sym_cache sym_cache;
965 /* _TLS_MODULE_BASE_ symbol. */
966 struct bfd_link_hash_entry *tls_module_base;
968 /* Used by local STT_GNU_IFUNC symbols. */
969 htab_t loc_hash_table;
970 void * loc_hash_memory;
972 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
975 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
976 bfd_vma next_tls_desc_index;
978 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
979 bfd_vma next_jump_slot_index;
981 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
982 bfd_vma next_irelative_index;
984 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
985 to read-only sections. */
986 bfd_boolean readonly_dynrelocs_against_ifunc;
989 /* Get the i386 ELF linker hash table from a link_info structure. */
991 #define elf_i386_hash_table(p) \
992 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
993 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
995 #define elf_i386_compute_jump_table_size(htab) \
996 ((htab)->elf.srelplt->reloc_count * 4)
998 /* Create an entry in an i386 ELF linker hash table. */
1000 static struct bfd_hash_entry *
1001 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
1002 struct bfd_hash_table *table,
1005 /* Allocate the structure if it has not already been allocated by a
1009 entry = (struct bfd_hash_entry *)
1010 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
1015 /* Call the allocation method of the superclass. */
1016 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
1019 struct elf_i386_link_hash_entry *eh;
1021 eh = (struct elf_i386_link_hash_entry *) entry;
1022 eh->dyn_relocs = NULL;
1023 eh->tls_type = GOT_UNKNOWN;
1025 eh->has_got_reloc = 0;
1026 eh->has_non_got_reloc = 0;
1027 eh->no_finish_dynamic_symbol = 0;
1028 eh->tls_get_addr = 2;
1029 eh->func_pointer_refcount = 0;
1030 eh->plt_got.offset = (bfd_vma) -1;
1031 eh->tlsdesc_got = (bfd_vma) -1;
1037 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1038 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1039 as global symbol. We reuse indx and dynstr_index for local symbol
1040 hash since they aren't used by global symbols in this backend. */
1043 elf_i386_local_htab_hash (const void *ptr)
1045 struct elf_link_hash_entry *h
1046 = (struct elf_link_hash_entry *) ptr;
1047 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
1050 /* Compare local hash entries. */
1053 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
1055 struct elf_link_hash_entry *h1
1056 = (struct elf_link_hash_entry *) ptr1;
1057 struct elf_link_hash_entry *h2
1058 = (struct elf_link_hash_entry *) ptr2;
1060 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
1063 /* Find and/or create a hash entry for local symbol. */
1065 static struct elf_link_hash_entry *
1066 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
1067 bfd *abfd, const Elf_Internal_Rela *rel,
1070 struct elf_i386_link_hash_entry e, *ret;
1071 asection *sec = abfd->sections;
1072 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
1073 ELF32_R_SYM (rel->r_info));
1076 e.elf.indx = sec->id;
1077 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
1078 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
1079 create ? INSERT : NO_INSERT);
1086 ret = (struct elf_i386_link_hash_entry *) *slot;
1090 ret = (struct elf_i386_link_hash_entry *)
1091 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
1092 sizeof (struct elf_i386_link_hash_entry));
1095 memset (ret, 0, sizeof (*ret));
1096 ret->elf.indx = sec->id;
1097 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
1098 ret->elf.dynindx = -1;
1099 ret->func_pointer_refcount = 0;
1100 ret->plt_got.offset = (bfd_vma) -1;
1106 /* Destroy an i386 ELF linker hash table. */
1109 elf_i386_link_hash_table_free (bfd *obfd)
1111 struct elf_i386_link_hash_table *htab
1112 = (struct elf_i386_link_hash_table *) obfd->link.hash;
1114 if (htab->loc_hash_table)
1115 htab_delete (htab->loc_hash_table);
1116 if (htab->loc_hash_memory)
1117 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1118 _bfd_elf_link_hash_table_free (obfd);
1121 /* Create an i386 ELF linker hash table. */
1123 static struct bfd_link_hash_table *
1124 elf_i386_link_hash_table_create (bfd *abfd)
1126 struct elf_i386_link_hash_table *ret;
1127 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
1129 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
1133 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1134 elf_i386_link_hash_newfunc,
1135 sizeof (struct elf_i386_link_hash_entry),
1142 ret->loc_hash_table = htab_try_create (1024,
1143 elf_i386_local_htab_hash,
1144 elf_i386_local_htab_eq,
1146 ret->loc_hash_memory = objalloc_create ();
1147 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1149 elf_i386_link_hash_table_free (abfd);
1152 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1154 return &ret->elf.root;
1157 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1160 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1161 struct elf_link_hash_entry *dir,
1162 struct elf_link_hash_entry *ind)
1164 struct elf_i386_link_hash_entry *edir, *eind;
1166 edir = (struct elf_i386_link_hash_entry *) dir;
1167 eind = (struct elf_i386_link_hash_entry *) ind;
1169 if (eind->dyn_relocs != NULL)
1171 if (edir->dyn_relocs != NULL)
1173 struct elf_dyn_relocs **pp;
1174 struct elf_dyn_relocs *p;
1176 /* Add reloc counts against the indirect sym to the direct sym
1177 list. Merge any entries against the same section. */
1178 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1180 struct elf_dyn_relocs *q;
1182 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1183 if (q->sec == p->sec)
1185 q->pc_count += p->pc_count;
1186 q->count += p->count;
1193 *pp = edir->dyn_relocs;
1196 edir->dyn_relocs = eind->dyn_relocs;
1197 eind->dyn_relocs = NULL;
1200 if (ind->root.type == bfd_link_hash_indirect
1201 && dir->got.refcount <= 0)
1203 edir->tls_type = eind->tls_type;
1204 eind->tls_type = GOT_UNKNOWN;
1207 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1208 generate a R_386_COPY reloc. */
1209 edir->gotoff_ref |= eind->gotoff_ref;
1211 edir->has_got_reloc |= eind->has_got_reloc;
1212 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1214 if (ELIMINATE_COPY_RELOCS
1215 && ind->root.type != bfd_link_hash_indirect
1216 && dir->dynamic_adjusted)
1218 /* If called to transfer flags for a weakdef during processing
1219 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1220 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1221 if (dir->versioned != versioned_hidden)
1222 dir->ref_dynamic |= ind->ref_dynamic;
1223 dir->ref_regular |= ind->ref_regular;
1224 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1225 dir->needs_plt |= ind->needs_plt;
1226 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1230 if (eind->func_pointer_refcount > 0)
1232 edir->func_pointer_refcount += eind->func_pointer_refcount;
1233 eind->func_pointer_refcount = 0;
1236 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1240 /* Return TRUE if the TLS access code sequence support transition
1244 elf_i386_check_tls_transition (asection *sec,
1246 Elf_Internal_Shdr *symtab_hdr,
1247 struct elf_link_hash_entry **sym_hashes,
1248 unsigned int r_type,
1249 const Elf_Internal_Rela *rel,
1250 const Elf_Internal_Rela *relend)
1252 unsigned int val, type, reg;
1253 unsigned long r_symndx;
1254 struct elf_link_hash_entry *h;
1257 bfd_boolean indirect_call, tls_get_addr;
1259 offset = rel->r_offset;
1264 if (offset < 2 || (rel + 1) >= relend)
1267 indirect_call = FALSE;
1268 call = contents + offset + 4;
1271 if (r_type == R_386_TLS_GD)
1273 /* Check transition from GD access model. Only
1274 leal foo@tlsgd(,%ebx,1), %eax
1275 call ___tls_get_addr@PLT
1277 leal foo@tlsgd(%ebx) %eax
1278 call ___tls_get_addr@PLT
1281 leal foo@tlsgd(%reg), %eax
1282 call *___tls_get_addr@GOT(%reg)
1283 which may be converted to
1284 addr32 call ___tls_get_addr
1285 can transit to different access model. */
1286 if ((offset + 10) > sec->size
1287 || (type != 0x8d && type != 0x04))
1292 /* leal foo@tlsgd(,%ebx,1), %eax
1293 call ___tls_get_addr@PLT */
1297 if (*(call - 7) != 0x8d
1305 leal foo@tlsgd(%ebx), %eax
1306 call ___tls_get_addr@PLT
1309 leal foo@tlsgd(%reg), %eax
1310 call *___tls_get_addr@GOT(%reg)
1311 which may be converted to
1312 addr32 call ___tls_get_addr
1314 %eax can't be used as the GOT base register since it
1315 is used to pass parameter to ___tls_get_addr. */
1317 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
1320 indirect_call = call[0] == 0xff;
1321 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
1322 && !(call[0] == 0x67 && call[1] == 0xe8)
1324 && (call[1] & 0xf8) == 0x90
1325 && (call[1] & 0x7) == reg))
1331 /* Check transition from LD access model. Only
1332 leal foo@tlsldm(%ebx), %eax
1333 call ___tls_get_addr@PLT
1335 leal foo@tlsldm(%reg), %eax
1336 call *___tls_get_addr@GOT(%reg)
1337 which may be converted to
1338 addr32 call ___tls_get_addr
1339 can transit to different access model. */
1340 if (type != 0x8d || (offset + 9) > sec->size)
1343 /* %eax can't be used as the GOT base register since it is
1344 used to pass parameter to ___tls_get_addr. */
1346 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
1349 indirect_call = call[0] == 0xff;
1350 if (!(reg == 3 && call[0] == 0xe8)
1351 && !(call[0] == 0x67 && call[1] == 0xe8)
1353 && (call[1] & 0xf8) == 0x90
1354 && (call[1] & 0x7) == reg))
1358 r_symndx = ELF32_R_SYM (rel[1].r_info);
1359 if (r_symndx < symtab_hdr->sh_info)
1362 tls_get_addr = FALSE;
1363 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1364 if (h != NULL && h->root.root.string != NULL)
1366 struct elf_i386_link_hash_entry *eh
1367 = (struct elf_i386_link_hash_entry *) h;
1368 tls_get_addr = eh->tls_get_addr == 1;
1369 if (eh->tls_get_addr > 1)
1371 /* Use strncmp to check ___tls_get_addr since
1372 ___tls_get_addr may be versioned. */
1373 if (strncmp (h->root.root.string, "___tls_get_addr", 15)
1376 eh->tls_get_addr = 1;
1377 tls_get_addr = TRUE;
1380 eh->tls_get_addr = 0;
1386 else if (indirect_call)
1387 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
1389 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1390 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
1393 /* Check transition from IE access model:
1394 movl foo@indntpoff(%rip), %eax
1395 movl foo@indntpoff(%rip), %reg
1396 addl foo@indntpoff(%rip), %reg
1399 if (offset < 1 || (offset + 4) > sec->size)
1402 /* Check "movl foo@tpoff(%rip), %eax" first. */
1403 val = bfd_get_8 (abfd, contents + offset - 1);
1410 /* Check movl|addl foo@tpoff(%rip), %reg. */
1411 type = bfd_get_8 (abfd, contents + offset - 2);
1412 return ((type == 0x8b || type == 0x03)
1413 && (val & 0xc7) == 0x05);
1415 case R_386_TLS_GOTIE:
1416 case R_386_TLS_IE_32:
1417 /* Check transition from {IE_32,GOTIE} access model:
1418 subl foo@{tpoff,gontoff}(%reg1), %reg2
1419 movl foo@{tpoff,gontoff}(%reg1), %reg2
1420 addl foo@{tpoff,gontoff}(%reg1), %reg2
1423 if (offset < 2 || (offset + 4) > sec->size)
1426 val = bfd_get_8 (abfd, contents + offset - 1);
1427 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1430 type = bfd_get_8 (abfd, contents + offset - 2);
1431 return type == 0x8b || type == 0x2b || type == 0x03;
1433 case R_386_TLS_GOTDESC:
1434 /* Check transition from GDesc access model:
1435 leal x@tlsdesc(%ebx), %eax
1437 Make sure it's a leal adding ebx to a 32-bit offset
1438 into any register, although it's probably almost always
1441 if (offset < 2 || (offset + 4) > sec->size)
1444 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1447 val = bfd_get_8 (abfd, contents + offset - 1);
1448 return (val & 0xc7) == 0x83;
1450 case R_386_TLS_DESC_CALL:
1451 /* Check transition from GDesc access model:
1452 call *x@tlsdesc(%eax)
1454 if (offset + 2 <= sec->size)
1456 /* Make sure that it's a call *x@tlsdesc(%eax). */
1457 call = contents + offset;
1458 return call[0] == 0xff && call[1] == 0x10;
1468 /* Return TRUE if the TLS access transition is OK or no transition
1469 will be performed. Update R_TYPE if there is a transition. */
1472 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1473 asection *sec, bfd_byte *contents,
1474 Elf_Internal_Shdr *symtab_hdr,
1475 struct elf_link_hash_entry **sym_hashes,
1476 unsigned int *r_type, int tls_type,
1477 const Elf_Internal_Rela *rel,
1478 const Elf_Internal_Rela *relend,
1479 struct elf_link_hash_entry *h,
1480 unsigned long r_symndx,
1481 bfd_boolean from_relocate_section)
1483 unsigned int from_type = *r_type;
1484 unsigned int to_type = from_type;
1485 bfd_boolean check = TRUE;
1487 /* Skip TLS transition for functions. */
1489 && (h->type == STT_FUNC
1490 || h->type == STT_GNU_IFUNC))
1496 case R_386_TLS_GOTDESC:
1497 case R_386_TLS_DESC_CALL:
1498 case R_386_TLS_IE_32:
1500 case R_386_TLS_GOTIE:
1501 if (bfd_link_executable (info))
1504 to_type = R_386_TLS_LE_32;
1505 else if (from_type != R_386_TLS_IE
1506 && from_type != R_386_TLS_GOTIE)
1507 to_type = R_386_TLS_IE_32;
1510 /* When we are called from elf_i386_relocate_section, there may
1511 be additional transitions based on TLS_TYPE. */
1512 if (from_relocate_section)
1514 unsigned int new_to_type = to_type;
1516 if (bfd_link_executable (info)
1519 && (tls_type & GOT_TLS_IE))
1520 new_to_type = R_386_TLS_LE_32;
1522 if (to_type == R_386_TLS_GD
1523 || to_type == R_386_TLS_GOTDESC
1524 || to_type == R_386_TLS_DESC_CALL)
1526 if (tls_type == GOT_TLS_IE_POS)
1527 new_to_type = R_386_TLS_GOTIE;
1528 else if (tls_type & GOT_TLS_IE)
1529 new_to_type = R_386_TLS_IE_32;
1532 /* We checked the transition before when we were called from
1533 elf_i386_check_relocs. We only want to check the new
1534 transition which hasn't been checked before. */
1535 check = new_to_type != to_type && from_type == to_type;
1536 to_type = new_to_type;
1542 if (bfd_link_executable (info))
1543 to_type = R_386_TLS_LE_32;
1550 /* Return TRUE if there is no transition. */
1551 if (from_type == to_type)
1554 /* Check if the transition can be performed. */
1556 && ! elf_i386_check_tls_transition (sec, contents,
1557 symtab_hdr, sym_hashes,
1558 from_type, rel, relend))
1560 reloc_howto_type *from, *to;
1563 from = elf_i386_rtype_to_howto (abfd, from_type);
1564 to = elf_i386_rtype_to_howto (abfd, to_type);
1567 name = h->root.root.string;
1570 struct elf_i386_link_hash_table *htab;
1572 htab = elf_i386_hash_table (info);
1577 Elf_Internal_Sym *isym;
1579 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1581 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1586 /* xgettext:c-format */
1587 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1588 "in section `%A' failed"),
1589 abfd, from->name, to->name, name,
1590 (unsigned long) rel->r_offset, sec);
1591 bfd_set_error (bfd_error_bad_value);
1599 /* With the local symbol, foo, we convert
1600 mov foo@GOT[(%reg1)], %reg2
1602 lea foo[@GOTOFF(%reg1)], %reg2
1604 call/jmp *foo@GOT[(%reg)]
1606 nop call foo/jmp foo nop
1607 When PIC is false, convert
1608 test %reg1, foo@GOT[(%reg2)]
1612 binop foo@GOT[(%reg1)], %reg2
1615 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1620 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1622 Elf_Internal_Rela *irel,
1623 struct elf_link_hash_entry *h,
1624 bfd_boolean *converted,
1625 struct bfd_link_info *link_info)
1627 struct elf_i386_link_hash_table *htab;
1628 unsigned int opcode;
1630 bfd_boolean baseless;
1631 Elf_Internal_Sym *isym;
1632 unsigned int addend;
1636 bfd_boolean to_reloc_32;
1637 unsigned int r_type;
1638 unsigned int r_symndx;
1639 bfd_vma roff = irel->r_offset;
1644 /* Addend for R_386_GOT32X relocations must be 0. */
1645 addend = bfd_get_32 (abfd, contents + roff);
1649 htab = elf_i386_hash_table (link_info);
1650 is_pic = bfd_link_pic (link_info);
1652 r_type = ELF32_R_TYPE (irel->r_info);
1653 r_symndx = ELF32_R_SYM (irel->r_info);
1655 modrm = bfd_get_8 (abfd, contents + roff - 1);
1656 baseless = (modrm & 0xc7) == 0x5;
1658 if (baseless && is_pic)
1660 /* For PIC, disallow R_386_GOT32X without a base register
1661 since we don't know what the GOT base is. */
1666 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1668 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1671 name = h->root.root.string;
1674 /* xgettext:c-format */
1675 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1676 " register can not be used when making a shared object"),
1681 opcode = bfd_get_8 (abfd, contents + roff - 2);
1683 /* Convert to R_386_32 if PIC is false or there is no base
1685 to_reloc_32 = !is_pic || baseless;
1687 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1691 if (opcode == 0x0ff)
1692 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1693 goto convert_branch;
1695 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1696 "test %reg1, foo@GOT(%reg2)" and
1697 "binop foo@GOT[(%reg1)], %reg2". */
1701 /* Undefined weak symbol is only bound locally in executable
1702 and its reference is resolved as 0. */
1703 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE,
1704 elf_i386_hash_entry (h)))
1708 /* No direct branch to 0 for PIC. */
1712 goto convert_branch;
1716 /* We can convert load of address 0 to R_386_32. */
1724 /* We have "call/jmp *foo@GOT[(%reg)]". */
1725 if ((h->root.type == bfd_link_hash_defined
1726 || h->root.type == bfd_link_hash_defweak)
1727 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1729 /* The function is locally defined. */
1731 /* Convert R_386_GOT32X to R_386_PC32. */
1732 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1734 struct elf_i386_link_hash_entry *eh
1735 = (struct elf_i386_link_hash_entry *) h;
1737 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1740 /* To support TLS optimization, always use addr32 prefix
1741 for "call *___tls_get_addr@GOT(%reg)". */
1742 if (eh && eh->tls_get_addr == 1)
1745 nop_offset = irel->r_offset - 2;
1749 nop = link_info->call_nop_byte;
1750 if (link_info->call_nop_as_suffix)
1752 nop_offset = roff + 3;
1753 irel->r_offset -= 1;
1756 nop_offset = roff - 2;
1761 /* Convert to "jmp foo nop". */
1764 nop_offset = roff + 3;
1765 irel->r_offset -= 1;
1768 bfd_put_8 (abfd, nop, contents + nop_offset);
1769 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1770 /* When converting to PC-relative relocation, we
1771 need to adjust addend by -4. */
1772 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1773 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1780 /* We have "mov foo@GOT[(%re1g)], %reg2",
1781 "test %reg1, foo@GOT(%reg2)" and
1782 "binop foo@GOT[(%reg1)], %reg2".
1784 Avoid optimizing _DYNAMIC since ld.so may use its
1785 link-time address. */
1786 if (h == htab->elf.hdynamic)
1789 /* def_regular is set by an assignment in a linker script in
1790 bfd_elf_record_link_assignment. */
1792 || h->root.type == bfd_link_hash_defined
1793 || h->root.type == bfd_link_hash_defweak)
1794 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1801 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1802 "mov $foo, %reg2" with R_386_32. */
1804 modrm = 0xc0 | (modrm & 0x38) >> 3;
1805 bfd_put_8 (abfd, modrm, contents + roff - 1);
1810 /* Convert "mov foo@GOT(%reg1), %reg2" to
1811 "lea foo@GOTOFF(%reg1), %reg2". */
1812 r_type = R_386_GOTOFF;
1818 /* Only R_386_32 is supported. */
1824 /* Convert "test %reg1, foo@GOT(%reg2)" to
1825 "test $foo, %reg1". */
1826 modrm = 0xc0 | (modrm & 0x38) >> 3;
1831 /* Convert "binop foo@GOT(%reg1), %reg2" to
1832 "binop $foo, %reg2". */
1834 | (modrm & 0x38) >> 3
1838 bfd_put_8 (abfd, modrm, contents + roff - 1);
1842 bfd_put_8 (abfd, opcode, contents + roff - 2);
1843 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1852 /* Rename some of the generic section flags to better document how they
1854 #define need_convert_load sec_flg0
1855 #define check_relocs_failed sec_flg1
1857 /* Look through the relocs for a section during the first phase, and
1858 calculate needed space in the global offset table, procedure linkage
1859 table, and dynamic reloc sections. */
1862 elf_i386_check_relocs (bfd *abfd,
1863 struct bfd_link_info *info,
1865 const Elf_Internal_Rela *relocs)
1867 struct elf_i386_link_hash_table *htab;
1868 Elf_Internal_Shdr *symtab_hdr;
1869 struct elf_link_hash_entry **sym_hashes;
1870 const Elf_Internal_Rela *rel;
1871 const Elf_Internal_Rela *rel_end;
1875 if (bfd_link_relocatable (info))
1878 /* Don't do anything special with non-loaded, non-alloced sections.
1879 In particular, any relocs in such sections should not affect GOT
1880 and PLT reference counting (ie. we don't allow them to create GOT
1881 or PLT entries), there's no possibility or desire to optimize TLS
1882 relocs, and there's not much point in propagating relocs to shared
1883 libs that the dynamic linker won't relocate. */
1884 if ((sec->flags & SEC_ALLOC) == 0)
1887 BFD_ASSERT (is_i386_elf (abfd));
1889 htab = elf_i386_hash_table (info);
1892 sec->check_relocs_failed = 1;
1896 /* Get the section contents. */
1897 if (elf_section_data (sec)->this_hdr.contents != NULL)
1898 contents = elf_section_data (sec)->this_hdr.contents;
1899 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1901 sec->check_relocs_failed = 1;
1905 symtab_hdr = &elf_symtab_hdr (abfd);
1906 sym_hashes = elf_sym_hashes (abfd);
1910 rel_end = relocs + sec->reloc_count;
1911 for (rel = relocs; rel < rel_end; rel++)
1913 unsigned int r_type;
1914 unsigned long r_symndx;
1915 struct elf_link_hash_entry *h;
1916 struct elf_i386_link_hash_entry *eh;
1917 Elf_Internal_Sym *isym;
1919 bfd_boolean size_reloc;
1921 r_symndx = ELF32_R_SYM (rel->r_info);
1922 r_type = ELF32_R_TYPE (rel->r_info);
1924 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1926 /* xgettext:c-format */
1927 _bfd_error_handler (_("%B: bad symbol index: %d"),
1932 if (r_symndx < symtab_hdr->sh_info)
1934 /* A local symbol. */
1935 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1940 /* Check relocation against local STT_GNU_IFUNC symbol. */
1941 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1943 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1947 /* Fake a STT_GNU_IFUNC symbol. */
1948 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1950 h->type = STT_GNU_IFUNC;
1953 h->forced_local = 1;
1954 h->root.type = bfd_link_hash_defined;
1962 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1963 while (h->root.type == bfd_link_hash_indirect
1964 || h->root.type == bfd_link_hash_warning)
1965 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1968 eh = (struct elf_i386_link_hash_entry *) h;
1971 if (r_type == R_386_GOTOFF)
1974 /* It is referenced by a non-shared object. */
1976 h->root.non_ir_ref_regular = 1;
1978 if (h->type == STT_GNU_IFUNC)
1979 elf_tdata (info->output_bfd)->has_gnu_symbols
1980 |= elf_gnu_symbol_ifunc;
1983 if (! elf_i386_tls_transition (info, abfd, sec, contents,
1984 symtab_hdr, sym_hashes,
1985 &r_type, GOT_UNKNOWN,
1986 rel, rel_end, h, r_symndx, FALSE))
1992 htab->tls_ldm_got.refcount += 1;
1996 /* This symbol requires a procedure linkage table entry. We
1997 actually build the entry in adjust_dynamic_symbol,
1998 because this might be a case of linking PIC code which is
1999 never referenced by a dynamic object, in which case we
2000 don't need to generate a procedure linkage table entry
2003 /* If this is a local symbol, we resolve it directly without
2004 creating a procedure linkage table entry. */
2008 eh->has_got_reloc = 1;
2010 h->plt.refcount += 1;
2017 case R_386_TLS_IE_32:
2019 case R_386_TLS_GOTIE:
2020 if (!bfd_link_executable (info))
2021 info->flags |= DF_STATIC_TLS;
2027 case R_386_TLS_GOTDESC:
2028 case R_386_TLS_DESC_CALL:
2029 /* This symbol requires a global offset table entry. */
2031 int tls_type, old_tls_type;
2038 tls_type = GOT_NORMAL;
2040 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
2041 case R_386_TLS_GOTDESC:
2042 case R_386_TLS_DESC_CALL:
2043 tls_type = GOT_TLS_GDESC; break;
2044 case R_386_TLS_IE_32:
2045 if (ELF32_R_TYPE (rel->r_info) == r_type)
2046 tls_type = GOT_TLS_IE_NEG;
2048 /* If this is a GD->IE transition, we may use either of
2049 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
2050 tls_type = GOT_TLS_IE;
2053 case R_386_TLS_GOTIE:
2054 tls_type = GOT_TLS_IE_POS; break;
2059 h->got.refcount += 1;
2060 old_tls_type = elf_i386_hash_entry(h)->tls_type;
2064 bfd_signed_vma *local_got_refcounts;
2066 /* This is a global offset table entry for a local symbol. */
2067 local_got_refcounts = elf_local_got_refcounts (abfd);
2068 if (local_got_refcounts == NULL)
2072 size = symtab_hdr->sh_info;
2073 size *= (sizeof (bfd_signed_vma)
2074 + sizeof (bfd_vma) + sizeof(char));
2075 local_got_refcounts = (bfd_signed_vma *)
2076 bfd_zalloc (abfd, size);
2077 if (local_got_refcounts == NULL)
2079 elf_local_got_refcounts (abfd) = local_got_refcounts;
2080 elf_i386_local_tlsdesc_gotent (abfd)
2081 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2082 elf_i386_local_got_tls_type (abfd)
2083 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2085 local_got_refcounts[r_symndx] += 1;
2086 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
2089 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
2090 tls_type |= old_tls_type;
2091 /* If a TLS symbol is accessed using IE at least once,
2092 there is no point to use dynamic model for it. */
2093 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2094 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2095 || (tls_type & GOT_TLS_IE) == 0))
2097 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
2098 tls_type = old_tls_type;
2099 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2100 && GOT_TLS_GD_ANY_P (tls_type))
2101 tls_type |= old_tls_type;
2105 name = h->root.root.string;
2107 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
2110 /* xgettext:c-format */
2111 (_("%B: `%s' accessed both as normal and "
2112 "thread local symbol"),
2114 bfd_set_error (bfd_error_bad_value);
2119 if (old_tls_type != tls_type)
2122 elf_i386_hash_entry (h)->tls_type = tls_type;
2124 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
2132 if (r_type != R_386_TLS_IE)
2135 eh->has_got_reloc = 1;
2140 case R_386_TLS_LE_32:
2143 eh->has_got_reloc = 1;
2144 if (bfd_link_executable (info))
2146 info->flags |= DF_STATIC_TLS;
2151 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2152 eh->has_non_got_reloc = 1;
2154 /* We are called after all symbols have been resolved. Only
2155 relocation against STT_GNU_IFUNC symbol must go through
2158 && (bfd_link_executable (info)
2159 || h->type == STT_GNU_IFUNC))
2161 /* If this reloc is in a read-only section, we might
2162 need a copy reloc. We can't check reliably at this
2163 stage whether the section is read-only, as input
2164 sections have not yet been mapped to output sections.
2165 Tentatively set the flag for now, and correct in
2166 adjust_dynamic_symbol. */
2169 /* We may need a .plt entry if the symbol is a function
2170 defined in a shared lib or is a STT_GNU_IFUNC function
2171 referenced from the code or read-only section. */
2173 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
2174 h->plt.refcount += 1;
2176 if (r_type == R_386_PC32)
2178 /* Since something like ".long foo - ." may be used
2179 as pointer, make sure that PLT is used if foo is
2180 a function defined in a shared library. */
2181 if ((sec->flags & SEC_CODE) == 0)
2182 h->pointer_equality_needed = 1;
2183 else if (h->type == STT_GNU_IFUNC
2184 && bfd_link_pic (info))
2187 /* xgettext:c-format */
2188 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
2189 abfd, h->root.root.string);
2190 bfd_set_error (bfd_error_bad_value);
2196 h->pointer_equality_needed = 1;
2197 /* R_386_32 can be resolved at run-time. */
2198 if (r_type == R_386_32
2199 && (sec->flags & SEC_READONLY) == 0)
2200 eh->func_pointer_refcount += 1;
2206 /* If we are creating a shared library, and this is a reloc
2207 against a global symbol, or a non PC relative reloc
2208 against a local symbol, then we need to copy the reloc
2209 into the shared library. However, if we are linking with
2210 -Bsymbolic, we do not need to copy a reloc against a
2211 global symbol which is defined in an object we are
2212 including in the link (i.e., DEF_REGULAR is set). At
2213 this point we have not seen all the input files, so it is
2214 possible that DEF_REGULAR is not set now but will be set
2215 later (it is never cleared). In case of a weak definition,
2216 DEF_REGULAR may be cleared later by a strong definition in
2217 a shared library. We account for that possibility below by
2218 storing information in the relocs_copied field of the hash
2219 table entry. A similar situation occurs when creating
2220 shared libraries and symbol visibility changes render the
2223 If on the other hand, we are creating an executable, we
2224 may need to keep relocations for symbols satisfied by a
2225 dynamic library if we manage to avoid copy relocs for the
2228 Generate dynamic pointer relocation against STT_GNU_IFUNC
2229 symbol in the non-code section. */
2230 if ((bfd_link_pic (info)
2231 && (r_type != R_386_PC32
2233 && (! (bfd_link_pie (info)
2234 || SYMBOLIC_BIND (info, h))
2235 || h->root.type == bfd_link_hash_defweak
2236 || !h->def_regular))))
2238 && h->type == STT_GNU_IFUNC
2239 && r_type == R_386_32
2240 && (sec->flags & SEC_CODE) == 0)
2241 || (ELIMINATE_COPY_RELOCS
2242 && !bfd_link_pic (info)
2244 && (h->root.type == bfd_link_hash_defweak
2245 || !h->def_regular)))
2247 struct elf_dyn_relocs *p;
2248 struct elf_dyn_relocs **head;
2250 /* We must copy these reloc types into the output file.
2251 Create a reloc section in dynobj and make room for
2255 sreloc = _bfd_elf_make_dynamic_reloc_section
2256 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
2262 /* If this is a global symbol, we count the number of
2263 relocations we need for this symbol. */
2266 head = &eh->dyn_relocs;
2270 /* Track dynamic relocs needed for local syms too.
2271 We really need local syms available to do this
2276 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2281 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2285 vpp = &elf_section_data (s)->local_dynrel;
2286 head = (struct elf_dyn_relocs **)vpp;
2290 if (p == NULL || p->sec != sec)
2292 bfd_size_type amt = sizeof *p;
2293 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
2305 /* Count size relocation as PC-relative relocation. */
2306 if (r_type == R_386_PC32 || size_reloc)
2311 /* This relocation describes the C++ object vtable hierarchy.
2312 Reconstruct it for later use during GC. */
2313 case R_386_GNU_VTINHERIT:
2314 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2318 /* This relocation describes which C++ vtable entries are actually
2319 used. Record for later use during GC. */
2320 case R_386_GNU_VTENTRY:
2321 BFD_ASSERT (h != NULL);
2323 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
2331 if (r_type == R_386_GOT32X
2332 && (h == NULL || h->type != STT_GNU_IFUNC))
2333 sec->need_convert_load = 1;
2336 if (elf_section_data (sec)->this_hdr.contents != contents)
2338 if (!info->keep_memory)
2342 /* Cache the section contents for elf_link_input_bfd. */
2343 elf_section_data (sec)->this_hdr.contents = contents;
2350 if (elf_section_data (sec)->this_hdr.contents != contents)
2352 sec->check_relocs_failed = 1;
2356 /* Return the section that should be marked against GC for a given
2360 elf_i386_gc_mark_hook (asection *sec,
2361 struct bfd_link_info *info,
2362 Elf_Internal_Rela *rel,
2363 struct elf_link_hash_entry *h,
2364 Elf_Internal_Sym *sym)
2367 switch (ELF32_R_TYPE (rel->r_info))
2369 case R_386_GNU_VTINHERIT:
2370 case R_386_GNU_VTENTRY:
2374 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2377 /* Remove undefined weak symbol from the dynamic symbol table if it
2378 is resolved to 0. */
2381 elf_i386_fixup_symbol (struct bfd_link_info *info,
2382 struct elf_link_hash_entry *h)
2384 if (h->dynindx != -1
2385 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2386 elf_i386_hash_entry (h)->has_got_reloc,
2387 elf_i386_hash_entry (h)))
2390 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2396 /* Adjust a symbol defined by a dynamic object and referenced by a
2397 regular object. The current definition is in some section of the
2398 dynamic object, but we're not including those sections. We have to
2399 change the definition to something the rest of the link can
2403 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2404 struct elf_link_hash_entry *h)
2406 struct elf_i386_link_hash_table *htab;
2408 struct elf_i386_link_hash_entry *eh;
2409 struct elf_dyn_relocs *p;
2411 /* STT_GNU_IFUNC symbol must go through PLT. */
2412 if (h->type == STT_GNU_IFUNC)
2414 /* All local STT_GNU_IFUNC references must be treate as local
2415 calls via local PLT. */
2417 && SYMBOL_CALLS_LOCAL (info, h))
2419 bfd_size_type pc_count = 0, count = 0;
2420 struct elf_dyn_relocs **pp;
2422 eh = (struct elf_i386_link_hash_entry *) h;
2423 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2425 pc_count += p->pc_count;
2426 p->count -= p->pc_count;
2435 if (pc_count || count)
2440 /* Increment PLT reference count only for PC-relative
2443 if (h->plt.refcount <= 0)
2444 h->plt.refcount = 1;
2446 h->plt.refcount += 1;
2451 if (h->plt.refcount <= 0)
2453 h->plt.offset = (bfd_vma) -1;
2459 /* If this is a function, put it in the procedure linkage table. We
2460 will fill in the contents of the procedure linkage table later,
2461 when we know the address of the .got section. */
2462 if (h->type == STT_FUNC
2465 if (h->plt.refcount <= 0
2466 || SYMBOL_CALLS_LOCAL (info, h)
2467 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2468 && h->root.type == bfd_link_hash_undefweak))
2470 /* This case can occur if we saw a PLT32 reloc in an input
2471 file, but the symbol was never referred to by a dynamic
2472 object, or if all references were garbage collected. In
2473 such a case, we don't actually need to build a procedure
2474 linkage table, and we can just do a PC32 reloc instead. */
2475 h->plt.offset = (bfd_vma) -1;
2482 /* It's possible that we incorrectly decided a .plt reloc was
2483 needed for an R_386_PC32 reloc to a non-function sym in
2484 check_relocs. We can't decide accurately between function and
2485 non-function syms in check-relocs; Objects loaded later in
2486 the link may change h->type. So fix it now. */
2487 h->plt.offset = (bfd_vma) -1;
2489 /* If this is a weak symbol, and there is a real definition, the
2490 processor independent code will have arranged for us to see the
2491 real definition first, and we can just use the same value. */
2492 if (h->u.weakdef != NULL)
2494 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2495 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2496 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2497 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2498 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2499 h->non_got_ref = h->u.weakdef->non_got_ref;
2503 /* This is a reference to a symbol defined by a dynamic object which
2504 is not a function. */
2506 /* If we are creating a shared library, we must presume that the
2507 only references to the symbol are via the global offset table.
2508 For such cases we need not do anything here; the relocations will
2509 be handled correctly by relocate_section. */
2510 if (!bfd_link_executable (info))
2513 /* If there are no references to this symbol that do not use the
2514 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2516 eh = (struct elf_i386_link_hash_entry *) h;
2517 if (!h->non_got_ref && !eh->gotoff_ref)
2520 /* If -z nocopyreloc was given, we won't generate them either. */
2521 if (info->nocopyreloc)
2527 htab = elf_i386_hash_table (info);
2531 /* If there aren't any dynamic relocs in read-only sections nor
2532 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2533 avoid the copy reloc. This doesn't work on VxWorks, where we can
2534 not have dynamic relocations (other than copy and jump slot
2535 relocations) in an executable. */
2536 if (ELIMINATE_COPY_RELOCS
2538 && get_elf_i386_backend_data (info->output_bfd)->os != is_vxworks)
2540 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2542 s = p->sec->output_section;
2543 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2554 /* We must allocate the symbol in our .dynbss section, which will
2555 become part of the .bss section of the executable. There will be
2556 an entry for this symbol in the .dynsym section. The dynamic
2557 object will contain position independent code, so all references
2558 from the dynamic object to this symbol will go through the global
2559 offset table. The dynamic linker will use the .dynsym entry to
2560 determine the address it must put in the global offset table, so
2561 both the dynamic object and the regular object will refer to the
2562 same memory location for the variable. */
2564 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2565 copy the initial value out of the dynamic object and into the
2566 runtime process image. */
2567 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2569 s = htab->elf.sdynrelro;
2570 srel = htab->elf.sreldynrelro;
2574 s = htab->elf.sdynbss;
2575 srel = htab->elf.srelbss;
2577 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2579 srel->size += sizeof (Elf32_External_Rel);
2583 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2586 /* Allocate space in .plt, .got and associated reloc sections for
2590 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2592 struct bfd_link_info *info;
2593 struct elf_i386_link_hash_table *htab;
2594 struct elf_i386_link_hash_entry *eh;
2595 struct elf_dyn_relocs *p;
2596 unsigned plt_entry_size;
2597 bfd_boolean resolved_to_zero;
2598 const struct elf_i386_backend_data *bed;
2600 if (h->root.type == bfd_link_hash_indirect)
2603 eh = (struct elf_i386_link_hash_entry *) h;
2605 info = (struct bfd_link_info *) inf;
2606 htab = elf_i386_hash_table (info);
2610 bed = get_elf_i386_backend_data (info->output_bfd);
2612 plt_entry_size = htab->plt.plt_entry_size;
2614 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2618 /* Clear the reference count of function pointer relocations if
2619 symbol isn't a normal function. */
2620 if (h->type != STT_FUNC)
2621 eh->func_pointer_refcount = 0;
2623 /* We can't use the GOT PLT if pointer equality is needed since
2624 finish_dynamic_symbol won't clear symbol value and the dynamic
2625 linker won't update the GOT slot. We will get into an infinite
2626 loop at run-time. */
2627 if (htab->plt_got != NULL
2628 && h->type != STT_GNU_IFUNC
2629 && !h->pointer_equality_needed
2630 && h->plt.refcount > 0
2631 && h->got.refcount > 0)
2633 /* Don't use the regular PLT if there are both GOT and GOTPLT
2635 h->plt.offset = (bfd_vma) -1;
2637 /* Use the GOT PLT. */
2638 eh->plt_got.refcount = 1;
2641 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2642 here if it is defined and referenced in a non-shared object. */
2643 if (h->type == STT_GNU_IFUNC
2645 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2646 &htab->readonly_dynrelocs_against_ifunc,
2648 (htab->plt.has_plt0 *
2651 /* Don't create the PLT entry if there are only function pointer
2652 relocations which can be resolved at run-time. */
2653 else if (htab->elf.dynamic_sections_created
2654 && (h->plt.refcount > eh->func_pointer_refcount
2655 || eh->plt_got.refcount > 0))
2657 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
2659 /* Clear the reference count of function pointer relocations
2661 eh->func_pointer_refcount = 0;
2663 /* Make sure this symbol is output as a dynamic symbol.
2664 Undefined weak syms won't yet be marked as dynamic. */
2665 if (h->dynindx == -1
2667 && !resolved_to_zero
2668 && h->root.type == bfd_link_hash_undefweak)
2670 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2674 if (bfd_link_pic (info)
2675 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2677 asection *s = htab->elf.splt;
2678 asection *got_s = htab->plt_got;
2680 /* If this is the first .plt entry, make room for the special
2681 first entry. The .plt section is used by prelink to undo
2682 prelinking for dynamic relocations. */
2684 s->size = htab->plt.has_plt0 * plt_entry_size;
2687 eh->plt_got.offset = got_s->size;
2689 h->plt.offset = s->size;
2691 /* If this symbol is not defined in a regular file, and we are
2692 not generating a shared library, then set the symbol to this
2693 location in the .plt. This is required to make function
2694 pointers compare as equal between the normal executable and
2695 the shared library. */
2696 if (! bfd_link_pic (info)
2701 /* We need to make a call to the entry of the GOT PLT
2702 instead of regular PLT entry. */
2703 h->root.u.def.section = got_s;
2704 h->root.u.def.value = eh->plt_got.offset;
2708 h->root.u.def.section = s;
2709 h->root.u.def.value = h->plt.offset;
2713 /* Make room for this entry. */
2715 got_s->size += htab->non_lazy_plt->plt_entry_size;
2718 s->size += plt_entry_size;
2720 /* We also need to make an entry in the .got.plt section,
2721 which will be placed in the .got section by the linker
2723 htab->elf.sgotplt->size += 4;
2725 /* There should be no PLT relocation against resolved
2726 undefined weak symbol in executable. */
2727 if (!resolved_to_zero)
2729 /* We also need to make an entry in the .rel.plt
2731 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2732 htab->elf.srelplt->reloc_count++;
2736 if (bed->os == is_vxworks && !bfd_link_pic (info))
2738 /* VxWorks has a second set of relocations for each PLT entry
2739 in executables. They go in a separate relocation section,
2740 which is processed by the kernel loader. */
2742 /* There are two relocations for the initial PLT entry: an
2743 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2744 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2746 if (h->plt.offset == plt_entry_size)
2747 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2749 /* There are two extra relocations for each subsequent PLT entry:
2750 an R_386_32 relocation for the GOT entry, and an R_386_32
2751 relocation for the PLT entry. */
2753 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2758 eh->plt_got.offset = (bfd_vma) -1;
2759 h->plt.offset = (bfd_vma) -1;
2765 eh->plt_got.offset = (bfd_vma) -1;
2766 h->plt.offset = (bfd_vma) -1;
2770 eh->tlsdesc_got = (bfd_vma) -1;
2772 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2773 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2774 if (h->got.refcount > 0
2775 && bfd_link_executable (info)
2777 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2778 h->got.offset = (bfd_vma) -1;
2779 else if (h->got.refcount > 0)
2783 int tls_type = elf_i386_hash_entry(h)->tls_type;
2785 /* Make sure this symbol is output as a dynamic symbol.
2786 Undefined weak syms won't yet be marked as dynamic. */
2787 if (h->dynindx == -1
2789 && !resolved_to_zero
2790 && h->root.type == bfd_link_hash_undefweak)
2792 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2797 if (GOT_TLS_GDESC_P (tls_type))
2799 eh->tlsdesc_got = htab->elf.sgotplt->size
2800 - elf_i386_compute_jump_table_size (htab);
2801 htab->elf.sgotplt->size += 8;
2802 h->got.offset = (bfd_vma) -2;
2804 if (! GOT_TLS_GDESC_P (tls_type)
2805 || GOT_TLS_GD_P (tls_type))
2807 h->got.offset = s->size;
2809 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2810 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2813 dyn = htab->elf.dynamic_sections_created;
2814 /* R_386_TLS_IE_32 needs one dynamic relocation,
2815 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2816 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2817 need two), R_386_TLS_GD needs one if local symbol and two if
2818 global. No dynamic relocation against resolved undefined weak
2819 symbol in executable. */
2820 if (tls_type == GOT_TLS_IE_BOTH)
2821 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2822 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2823 || (tls_type & GOT_TLS_IE))
2824 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2825 else if (GOT_TLS_GD_P (tls_type))
2826 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2827 else if (! GOT_TLS_GDESC_P (tls_type)
2828 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2829 && !resolved_to_zero)
2830 || h->root.type != bfd_link_hash_undefweak)
2831 && (bfd_link_pic (info)
2832 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2833 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2834 if (GOT_TLS_GDESC_P (tls_type))
2835 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2838 h->got.offset = (bfd_vma) -1;
2840 if (eh->dyn_relocs == NULL)
2843 /* In the shared -Bsymbolic case, discard space allocated for
2844 dynamic pc-relative relocs against symbols which turn out to be
2845 defined in regular objects. For the normal shared case, discard
2846 space for pc-relative relocs that have become local due to symbol
2847 visibility changes. */
2849 if (bfd_link_pic (info))
2851 /* The only reloc that uses pc_count is R_386_PC32, which will
2852 appear on a call or on something like ".long foo - .". We
2853 want calls to protected symbols to resolve directly to the
2854 function rather than going via the plt. If people want
2855 function pointer comparisons to work as expected then they
2856 should avoid writing assembly like ".long foo - .". */
2857 if (SYMBOL_CALLS_LOCAL (info, h))
2859 struct elf_dyn_relocs **pp;
2861 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2863 p->count -= p->pc_count;
2872 if (bed->os == is_vxworks)
2874 struct elf_dyn_relocs **pp;
2875 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2877 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2884 /* Also discard relocs on undefined weak syms with non-default
2885 visibility or in PIE. */
2886 if (eh->dyn_relocs != NULL
2887 && h->root.type == bfd_link_hash_undefweak)
2889 /* Undefined weak symbol is never bound locally in shared
2891 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2892 || resolved_to_zero)
2896 /* Keep dynamic non-GOT/non-PLT relocation so that we
2897 can branch to 0 without PLT. */
2898 struct elf_dyn_relocs **pp;
2900 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2901 if (p->pc_count == 0)
2905 /* Remove non-R_386_PC32 relocation. */
2906 p->count = p->pc_count;
2910 if (eh->dyn_relocs != NULL)
2912 /* Make sure undefined weak symbols are output
2913 as dynamic symbols in PIEs for dynamic non-GOT
2914 non-PLT reloations. */
2915 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2920 eh->dyn_relocs = NULL;
2922 else if (h->dynindx == -1
2923 && !h->forced_local)
2925 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2930 else if (ELIMINATE_COPY_RELOCS)
2932 /* For the non-shared case, discard space for relocs against
2933 symbols which turn out to need copy relocs or are not
2934 dynamic. Keep dynamic relocations for run-time function
2935 pointer initialization. */
2937 if ((!h->non_got_ref
2938 || eh->func_pointer_refcount > 0
2939 || (h->root.type == bfd_link_hash_undefweak
2940 && !resolved_to_zero))
2943 || (htab->elf.dynamic_sections_created
2944 && (h->root.type == bfd_link_hash_undefweak
2945 || h->root.type == bfd_link_hash_undefined))))
2947 /* Make sure this symbol is output as a dynamic symbol.
2948 Undefined weak syms won't yet be marked as dynamic. */
2949 if (h->dynindx == -1
2951 && !resolved_to_zero
2952 && h->root.type == bfd_link_hash_undefweak)
2954 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2958 /* If that succeeded, we know we'll be keeping all the
2960 if (h->dynindx != -1)
2964 eh->dyn_relocs = NULL;
2965 eh->func_pointer_refcount = 0;
2970 /* Finally, allocate space. */
2971 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2975 sreloc = elf_section_data (p->sec)->sreloc;
2977 BFD_ASSERT (sreloc != NULL);
2978 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2984 /* Allocate space in .plt, .got and associated reloc sections for
2985 local dynamic relocs. */
2988 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2990 struct elf_link_hash_entry *h
2991 = (struct elf_link_hash_entry *) *slot;
2993 if (h->type != STT_GNU_IFUNC
2997 || h->root.type != bfd_link_hash_defined)
3000 return elf_i386_allocate_dynrelocs (h, inf);
3003 /* Find any dynamic relocs that apply to read-only sections. */
3006 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3008 struct elf_i386_link_hash_entry *eh;
3009 struct elf_dyn_relocs *p;
3011 /* Skip local IFUNC symbols. */
3012 if (h->forced_local && h->type == STT_GNU_IFUNC)
3015 eh = (struct elf_i386_link_hash_entry *) h;
3016 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3018 asection *s = p->sec->output_section;
3020 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3022 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3024 info->flags |= DF_TEXTREL;
3026 if ((info->warn_shared_textrel && bfd_link_pic (info))
3027 || info->error_textrel)
3028 /* xgettext:c-format */
3029 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3030 p->sec->owner, h->root.root.string,
3033 /* Not an error, just cut short the traversal. */
3040 /* Convert load via the GOT slot to load immediate. */
3043 elf_i386_convert_load (bfd *abfd, asection *sec,
3044 struct bfd_link_info *link_info)
3046 struct elf_i386_link_hash_table *htab;
3047 Elf_Internal_Shdr *symtab_hdr;
3048 Elf_Internal_Rela *internal_relocs;
3049 Elf_Internal_Rela *irel, *irelend;
3051 bfd_boolean changed;
3052 bfd_signed_vma *local_got_refcounts;
3054 /* Don't even try to convert non-ELF outputs. */
3055 if (!is_elf_hash_table (link_info->hash))
3058 /* Nothing to do if there is no need or no output. */
3059 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
3060 || sec->need_convert_load == 0
3061 || bfd_is_abs_section (sec->output_section))
3064 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3066 /* Load the relocations for this section. */
3067 internal_relocs = (_bfd_elf_link_read_relocs
3068 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3069 link_info->keep_memory));
3070 if (internal_relocs == NULL)
3074 htab = elf_i386_hash_table (link_info);
3075 local_got_refcounts = elf_local_got_refcounts (abfd);
3077 /* Get the section contents. */
3078 if (elf_section_data (sec)->this_hdr.contents != NULL)
3079 contents = elf_section_data (sec)->this_hdr.contents;
3082 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3086 irelend = internal_relocs + sec->reloc_count;
3087 for (irel = internal_relocs; irel < irelend; irel++)
3089 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3090 unsigned int r_symndx;
3091 struct elf_link_hash_entry *h;
3092 bfd_boolean converted;
3094 /* Don't convert R_386_GOT32 since we can't tell if it is applied
3095 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
3096 if (r_type != R_386_GOT32X)
3099 r_symndx = ELF32_R_SYM (irel->r_info);
3100 if (r_symndx < symtab_hdr->sh_info)
3101 h = elf_i386_get_local_sym_hash (htab, sec->owner,
3102 (const Elf_Internal_Rela *) irel,
3106 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
3107 while (h->root.type == bfd_link_hash_indirect
3108 || h->root.type == bfd_link_hash_warning)
3109 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3112 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3113 if (h != NULL && h->type == STT_GNU_IFUNC)
3117 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
3118 irel, h, &converted, link_info))
3123 changed = converted;
3126 if (h->got.refcount > 0)
3127 h->got.refcount -= 1;
3131 if (local_got_refcounts != NULL
3132 && local_got_refcounts[r_symndx] > 0)
3133 local_got_refcounts[r_symndx] -= 1;
3138 if (contents != NULL
3139 && elf_section_data (sec)->this_hdr.contents != contents)
3141 if (!changed && !link_info->keep_memory)
3145 /* Cache the section contents for elf_link_input_bfd. */
3146 elf_section_data (sec)->this_hdr.contents = contents;
3150 if (elf_section_data (sec)->relocs != internal_relocs)
3153 free (internal_relocs);
3155 elf_section_data (sec)->relocs = internal_relocs;
3161 if (contents != NULL
3162 && elf_section_data (sec)->this_hdr.contents != contents)
3164 if (internal_relocs != NULL
3165 && elf_section_data (sec)->relocs != internal_relocs)
3166 free (internal_relocs);
3170 /* Set the sizes of the dynamic sections. */
3173 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
3175 struct elf_i386_link_hash_table *htab;
3181 htab = elf_i386_hash_table (info);
3184 dynobj = htab->elf.dynobj;
3188 /* Set up .got offsets for local syms, and space for local dynamic
3190 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3192 bfd_signed_vma *local_got;
3193 bfd_signed_vma *end_local_got;
3194 char *local_tls_type;
3195 bfd_vma *local_tlsdesc_gotent;
3196 bfd_size_type locsymcount;
3197 Elf_Internal_Shdr *symtab_hdr;
3200 if (! is_i386_elf (ibfd))
3203 for (s = ibfd->sections; s != NULL; s = s->next)
3205 struct elf_dyn_relocs *p;
3207 if (!elf_i386_convert_load (ibfd, s, info))
3210 for (p = ((struct elf_dyn_relocs *)
3211 elf_section_data (s)->local_dynrel);
3215 if (!bfd_is_abs_section (p->sec)
3216 && bfd_is_abs_section (p->sec->output_section))
3218 /* Input section has been discarded, either because
3219 it is a copy of a linkonce section or due to
3220 linker script /DISCARD/, so we'll be discarding
3223 else if ((get_elf_i386_backend_data (output_bfd)->os
3225 && strcmp (p->sec->output_section->name,
3228 /* Relocations in vxworks .tls_vars sections are
3229 handled specially by the loader. */
3231 else if (p->count != 0)
3233 srel = elf_section_data (p->sec)->sreloc;
3234 srel->size += p->count * sizeof (Elf32_External_Rel);
3235 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3236 && (info->flags & DF_TEXTREL) == 0)
3238 info->flags |= DF_TEXTREL;
3239 if ((info->warn_shared_textrel && bfd_link_pic (info))
3240 || info->error_textrel)
3241 /* xgettext:c-format */
3242 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3243 p->sec->owner, p->sec);
3249 local_got = elf_local_got_refcounts (ibfd);
3253 symtab_hdr = &elf_symtab_hdr (ibfd);
3254 locsymcount = symtab_hdr->sh_info;
3255 end_local_got = local_got + locsymcount;
3256 local_tls_type = elf_i386_local_got_tls_type (ibfd);
3257 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
3259 srel = htab->elf.srelgot;
3260 for (; local_got < end_local_got;
3261 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3263 *local_tlsdesc_gotent = (bfd_vma) -1;
3266 if (GOT_TLS_GDESC_P (*local_tls_type))
3268 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3269 - elf_i386_compute_jump_table_size (htab);
3270 htab->elf.sgotplt->size += 8;
3271 *local_got = (bfd_vma) -2;
3273 if (! GOT_TLS_GDESC_P (*local_tls_type)
3274 || GOT_TLS_GD_P (*local_tls_type))
3276 *local_got = s->size;
3278 if (GOT_TLS_GD_P (*local_tls_type)
3279 || *local_tls_type == GOT_TLS_IE_BOTH)
3282 if (bfd_link_pic (info)
3283 || GOT_TLS_GD_ANY_P (*local_tls_type)
3284 || (*local_tls_type & GOT_TLS_IE))
3286 if (*local_tls_type == GOT_TLS_IE_BOTH)
3287 srel->size += 2 * sizeof (Elf32_External_Rel);
3288 else if (GOT_TLS_GD_P (*local_tls_type)
3289 || ! GOT_TLS_GDESC_P (*local_tls_type))
3290 srel->size += sizeof (Elf32_External_Rel);
3291 if (GOT_TLS_GDESC_P (*local_tls_type))
3292 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
3296 *local_got = (bfd_vma) -1;
3300 if (htab->tls_ldm_got.refcount > 0)
3302 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3304 htab->tls_ldm_got.offset = htab->elf.sgot->size;
3305 htab->elf.sgot->size += 8;
3306 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
3309 htab->tls_ldm_got.offset = -1;
3311 /* Allocate global sym .plt and .got entries, and space for global
3312 sym dynamic relocs. */
3313 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
3315 /* Allocate .plt and .got entries, and space for local symbols. */
3316 htab_traverse (htab->loc_hash_table,
3317 elf_i386_allocate_local_dynrelocs,
3320 /* For every jump slot reserved in the sgotplt, reloc_count is
3321 incremented. However, when we reserve space for TLS descriptors,
3322 it's not incremented, so in order to compute the space reserved
3323 for them, it suffices to multiply the reloc count by the jump
3326 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3327 so that R_386_IRELATIVE entries come last. */
3328 if (htab->elf.srelplt)
3330 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
3331 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
3332 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3334 else if (htab->elf.irelplt)
3335 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3338 if (htab->elf.sgotplt)
3340 /* Don't allocate .got.plt section if there are no GOT nor PLT
3341 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3342 if ((htab->elf.hgot == NULL
3343 || !htab->elf.hgot->ref_regular_nonweak)
3344 && (htab->elf.sgotplt->size
3345 == get_elf_backend_data (output_bfd)->got_header_size)
3346 && (htab->elf.splt == NULL
3347 || htab->elf.splt->size == 0)
3348 && (htab->elf.sgot == NULL
3349 || htab->elf.sgot->size == 0)
3350 && (htab->elf.iplt == NULL
3351 || htab->elf.iplt->size == 0)
3352 && (htab->elf.igotplt == NULL
3353 || htab->elf.igotplt->size == 0))
3354 htab->elf.sgotplt->size = 0;
3357 if (_bfd_elf_eh_frame_present (info))
3359 if (htab->plt_eh_frame != NULL
3360 && htab->elf.splt != NULL
3361 && htab->elf.splt->size != 0
3362 && !bfd_is_abs_section (htab->elf.splt->output_section))
3363 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
3365 if (htab->plt_got_eh_frame != NULL
3366 && htab->plt_got != NULL
3367 && htab->plt_got->size != 0
3368 && !bfd_is_abs_section (htab->plt_got->output_section))
3369 htab->plt_got_eh_frame->size
3370 = htab->non_lazy_plt->eh_frame_plt_size;
3373 /* We now have determined the sizes of the various dynamic sections.
3374 Allocate memory for them. */
3376 for (s = dynobj->sections; s != NULL; s = s->next)
3378 bfd_boolean strip_section = TRUE;
3380 if ((s->flags & SEC_LINKER_CREATED) == 0)
3383 if (s == htab->elf.splt
3384 || s == htab->elf.sgot)
3386 /* Strip this section if we don't need it; see the
3388 /* We'd like to strip these sections if they aren't needed, but if
3389 we've exported dynamic symbols from them we must leave them.
3390 It's too late to tell BFD to get rid of the symbols. */
3392 if (htab->elf.hplt != NULL)
3393 strip_section = FALSE;
3395 else if (s == htab->elf.sgotplt
3396 || s == htab->elf.iplt
3397 || s == htab->elf.igotplt
3398 || s == htab->plt_got
3399 || s == htab->plt_eh_frame
3400 || s == htab->plt_got_eh_frame
3401 || s == htab->elf.sdynbss
3402 || s == htab->elf.sdynrelro)
3404 /* Strip these too. */
3406 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
3409 && s != htab->elf.srelplt
3410 && s != htab->srelplt2)
3413 /* We use the reloc_count field as a counter if we need
3414 to copy relocs into the output file. */
3419 /* It's not one of our sections, so don't allocate space. */
3425 /* If we don't need this section, strip it from the
3426 output file. This is mostly to handle .rel.bss and
3427 .rel.plt. We must create both sections in
3428 create_dynamic_sections, because they must be created
3429 before the linker maps input sections to output
3430 sections. The linker does that before
3431 adjust_dynamic_symbol is called, and it is that
3432 function which decides whether anything needs to go
3433 into these sections. */
3435 s->flags |= SEC_EXCLUDE;
3439 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3442 /* Allocate memory for the section contents. We use bfd_zalloc
3443 here in case unused entries are not reclaimed before the
3444 section's contents are written out. This should not happen,
3445 but this way if it does, we get a R_386_NONE reloc instead
3447 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3448 if (s->contents == NULL)
3452 if (htab->plt_eh_frame != NULL
3453 && htab->plt_eh_frame->contents != NULL)
3455 memcpy (htab->plt_eh_frame->contents,
3456 htab->plt.eh_frame_plt,
3457 htab->plt_eh_frame->size);
3458 bfd_put_32 (dynobj, htab->elf.splt->size,
3459 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3462 if (htab->plt_got_eh_frame != NULL
3463 && htab->plt_got_eh_frame->contents != NULL)
3465 memcpy (htab->plt_got_eh_frame->contents,
3466 htab->non_lazy_plt->eh_frame_plt,
3467 htab->plt_got_eh_frame->size);
3468 bfd_put_32 (dynobj, htab->plt_got->size,
3469 (htab->plt_got_eh_frame->contents
3470 + PLT_FDE_LEN_OFFSET));
3473 if (htab->elf.dynamic_sections_created)
3475 /* Add some entries to the .dynamic section. We fill in the
3476 values later, in elf_i386_finish_dynamic_sections, but we
3477 must add the entries now so that we get the correct size for
3478 the .dynamic section. The DT_DEBUG entry is filled in by the
3479 dynamic linker and used by the debugger. */
3480 #define add_dynamic_entry(TAG, VAL) \
3481 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3483 if (bfd_link_executable (info))
3485 if (!add_dynamic_entry (DT_DEBUG, 0))
3489 if (htab->elf.splt->size != 0)
3491 /* DT_PLTGOT is used by prelink even if there is no PLT
3493 if (!add_dynamic_entry (DT_PLTGOT, 0))
3497 if (htab->elf.srelplt->size != 0)
3499 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3500 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3501 || !add_dynamic_entry (DT_JMPREL, 0))
3507 if (!add_dynamic_entry (DT_REL, 0)
3508 || !add_dynamic_entry (DT_RELSZ, 0)
3509 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3512 /* If any dynamic relocs apply to a read-only section,
3513 then we need a DT_TEXTREL entry. */
3514 if ((info->flags & DF_TEXTREL) == 0)
3515 elf_link_hash_traverse (&htab->elf,
3516 elf_i386_readonly_dynrelocs, info);
3518 if ((info->flags & DF_TEXTREL) != 0)
3520 if (htab->readonly_dynrelocs_against_ifunc)
3522 info->callbacks->einfo
3523 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3524 bfd_set_error (bfd_error_bad_value);
3528 if (!add_dynamic_entry (DT_TEXTREL, 0))
3532 if (get_elf_i386_backend_data (output_bfd)->os == is_vxworks
3533 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3536 #undef add_dynamic_entry
3542 elf_i386_always_size_sections (bfd *output_bfd,
3543 struct bfd_link_info *info)
3545 asection *tls_sec = elf_hash_table (info)->tls_sec;
3549 struct elf_link_hash_entry *tlsbase;
3551 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3552 "_TLS_MODULE_BASE_",
3553 FALSE, FALSE, FALSE);
3555 if (tlsbase && tlsbase->type == STT_TLS)
3557 struct elf_i386_link_hash_table *htab;
3558 struct bfd_link_hash_entry *bh = NULL;
3559 const struct elf_backend_data *bed
3560 = get_elf_backend_data (output_bfd);
3562 htab = elf_i386_hash_table (info);
3566 if (!(_bfd_generic_link_add_one_symbol
3567 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3568 tls_sec, 0, NULL, FALSE,
3569 bed->collect, &bh)))
3572 htab->tls_module_base = bh;
3574 tlsbase = (struct elf_link_hash_entry *)bh;
3575 tlsbase->def_regular = 1;
3576 tlsbase->other = STV_HIDDEN;
3577 tlsbase->root.linker_def = 1;
3578 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3585 /* Set the correct type for an x86 ELF section. We do this by the
3586 section name, which is a hack, but ought to work. */
3589 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3590 Elf_Internal_Shdr *hdr,
3595 name = bfd_get_section_name (abfd, sec);
3597 /* This is an ugly, but unfortunately necessary hack that is
3598 needed when producing EFI binaries on x86. It tells
3599 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3600 containing ELF relocation info. We need this hack in order to
3601 be able to generate ELF binaries that can be translated into
3602 EFI applications (which are essentially COFF objects). Those
3603 files contain a COFF ".reloc" section inside an ELFNN object,
3604 which would normally cause BFD to segfault because it would
3605 attempt to interpret this section as containing relocation
3606 entries for section "oc". With this hack enabled, ".reloc"
3607 will be treated as a normal data section, which will avoid the
3608 segfault. However, you won't be able to create an ELFNN binary
3609 with a section named "oc" that needs relocations, but that's
3610 the kind of ugly side-effects you get when detecting section
3611 types based on their names... In practice, this limitation is
3612 unlikely to bite. */
3613 if (strcmp (name, ".reloc") == 0)
3614 hdr->sh_type = SHT_PROGBITS;
3619 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3620 executables. Rather than setting it to the beginning of the TLS
3621 section, we have to set it to the end. This function may be called
3622 multiple times, it is idempotent. */
3625 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3627 struct elf_i386_link_hash_table *htab;
3628 struct bfd_link_hash_entry *base;
3630 if (!bfd_link_executable (info))
3633 htab = elf_i386_hash_table (info);
3637 base = htab->tls_module_base;
3641 base->u.def.value = htab->elf.tls_size;
3644 /* Return the base VMA address which should be subtracted from real addresses
3645 when resolving @dtpoff relocation.
3646 This is PT_TLS segment p_vaddr. */
3649 elf_i386_dtpoff_base (struct bfd_link_info *info)
3651 /* If tls_sec is NULL, we should have signalled an error already. */
3652 if (elf_hash_table (info)->tls_sec == NULL)
3654 return elf_hash_table (info)->tls_sec->vma;
3657 /* Return the relocation value for @tpoff relocation
3658 if STT_TLS virtual address is ADDRESS. */
3661 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3663 struct elf_link_hash_table *htab = elf_hash_table (info);
3664 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3665 bfd_vma static_tls_size;
3667 /* If tls_sec is NULL, we should have signalled an error already. */
3668 if (htab->tls_sec == NULL)
3671 /* Consider special static TLS alignment requirements. */
3672 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3673 return static_tls_size + htab->tls_sec->vma - address;
3676 /* Relocate an i386 ELF section. */
3679 elf_i386_relocate_section (bfd *output_bfd,
3680 struct bfd_link_info *info,
3682 asection *input_section,
3684 Elf_Internal_Rela *relocs,
3685 Elf_Internal_Sym *local_syms,
3686 asection **local_sections)
3688 struct elf_i386_link_hash_table *htab;
3689 Elf_Internal_Shdr *symtab_hdr;
3690 struct elf_link_hash_entry **sym_hashes;
3691 bfd_vma *local_got_offsets;
3692 bfd_vma *local_tlsdesc_gotents;
3693 Elf_Internal_Rela *rel;
3694 Elf_Internal_Rela *wrel;
3695 Elf_Internal_Rela *relend;
3696 bfd_boolean is_vxworks_tls;
3697 unsigned plt_entry_size;
3699 BFD_ASSERT (is_i386_elf (input_bfd));
3701 /* Skip if check_relocs failed. */
3702 if (input_section->check_relocs_failed)
3705 htab = elf_i386_hash_table (info);
3708 symtab_hdr = &elf_symtab_hdr (input_bfd);
3709 sym_hashes = elf_sym_hashes (input_bfd);
3710 local_got_offsets = elf_local_got_offsets (input_bfd);
3711 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3712 /* We have to handle relocations in vxworks .tls_vars sections
3713 specially, because the dynamic loader is 'weird'. */
3714 is_vxworks_tls = ((get_elf_i386_backend_data (output_bfd)->os
3716 && bfd_link_pic (info)
3717 && !strcmp (input_section->output_section->name,
3720 elf_i386_set_tls_module_base (info);
3722 plt_entry_size = htab->plt.plt_entry_size;
3724 rel = wrel = relocs;
3725 relend = relocs + input_section->reloc_count;
3726 for (; rel < relend; wrel++, rel++)
3728 unsigned int r_type;
3729 reloc_howto_type *howto;
3730 unsigned long r_symndx;
3731 struct elf_link_hash_entry *h;
3732 struct elf_i386_link_hash_entry *eh;
3733 Elf_Internal_Sym *sym;
3735 bfd_vma off, offplt, plt_offset;
3737 bfd_boolean unresolved_reloc;
3738 bfd_reloc_status_type r;
3742 asection *resolved_plt;
3743 bfd_boolean resolved_to_zero;
3744 bfd_boolean relative_reloc;
3746 r_type = ELF32_R_TYPE (rel->r_info);
3747 if (r_type == R_386_GNU_VTINHERIT
3748 || r_type == R_386_GNU_VTENTRY)
3755 if ((indx = r_type) >= R_386_standard
3756 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3757 >= R_386_ext - R_386_standard)
3758 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3759 >= R_386_ext2 - R_386_ext))
3762 /* xgettext:c-format */
3763 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3764 input_bfd, r_type, input_section);
3765 bfd_set_error (bfd_error_bad_value);
3768 howto = elf_howto_table + indx;
3770 r_symndx = ELF32_R_SYM (rel->r_info);
3774 unresolved_reloc = FALSE;
3775 if (r_symndx < symtab_hdr->sh_info)
3777 sym = local_syms + r_symndx;
3778 sec = local_sections[r_symndx];
3779 relocation = (sec->output_section->vma
3780 + sec->output_offset
3782 st_size = sym->st_size;
3784 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3785 && ((sec->flags & SEC_MERGE) != 0
3786 || (bfd_link_relocatable (info)
3787 && sec->output_offset != 0)))
3790 bfd_byte *where = contents + rel->r_offset;
3792 switch (howto->size)
3795 addend = bfd_get_8 (input_bfd, where);
3796 if (howto->pc_relative)
3798 addend = (addend ^ 0x80) - 0x80;
3803 addend = bfd_get_16 (input_bfd, where);
3804 if (howto->pc_relative)
3806 addend = (addend ^ 0x8000) - 0x8000;
3811 addend = bfd_get_32 (input_bfd, where);
3812 if (howto->pc_relative)
3814 addend = (addend ^ 0x80000000) - 0x80000000;
3822 if (bfd_link_relocatable (info))
3823 addend += sec->output_offset;
3826 asection *msec = sec;
3827 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3829 addend -= relocation;
3830 addend += msec->output_section->vma + msec->output_offset;
3833 switch (howto->size)
3836 /* FIXME: overflow checks. */
3837 if (howto->pc_relative)
3839 bfd_put_8 (input_bfd, addend, where);
3842 if (howto->pc_relative)
3844 bfd_put_16 (input_bfd, addend, where);
3847 if (howto->pc_relative)
3849 bfd_put_32 (input_bfd, addend, where);
3853 else if (!bfd_link_relocatable (info)
3854 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3856 /* Relocate against local STT_GNU_IFUNC symbol. */
3857 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3862 /* Set STT_GNU_IFUNC symbol value. */
3863 h->root.u.def.value = sym->st_value;
3864 h->root.u.def.section = sec;
3869 bfd_boolean warned ATTRIBUTE_UNUSED;
3870 bfd_boolean ignored ATTRIBUTE_UNUSED;
3872 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3873 r_symndx, symtab_hdr, sym_hashes,
3875 unresolved_reloc, warned, ignored);
3879 if (sec != NULL && discarded_section (sec))
3881 _bfd_clear_contents (howto, input_bfd, input_section,
3882 contents + rel->r_offset);
3883 wrel->r_offset = rel->r_offset;
3887 /* For ld -r, remove relocations in debug sections against
3888 sections defined in discarded sections. Not done for
3889 eh_frame editing code expects to be present. */
3890 if (bfd_link_relocatable (info)
3891 && (input_section->flags & SEC_DEBUGGING))
3897 if (bfd_link_relocatable (info))
3904 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3905 it here if it is defined in a non-shared object. */
3907 && h->type == STT_GNU_IFUNC
3910 asection *plt, *gotplt, *base_got;
3914 if ((input_section->flags & SEC_ALLOC) == 0)
3916 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3917 sections because such sections are not SEC_ALLOC and
3918 thus ld.so will not process them. */
3919 if ((input_section->flags & SEC_DEBUGGING) != 0)
3924 /* STT_GNU_IFUNC symbol must go through PLT. */
3925 if (htab->elf.splt != NULL)
3927 plt = htab->elf.splt;
3928 gotplt = htab->elf.sgotplt;
3932 plt = htab->elf.iplt;
3933 gotplt = htab->elf.igotplt;
3943 base_got = htab->elf.sgot;
3944 off = h->got.offset;
3946 if (base_got == NULL)
3949 if (off == (bfd_vma) -1)
3951 /* We can't use h->got.offset here to save state, or
3952 even just remember the offset, as finish_dynamic_symbol
3953 would use that as offset into .got. */
3955 if (h->plt.offset == (bfd_vma) -1)
3958 if (htab->elf.splt != NULL)
3960 plt_index = (h->plt.offset / plt_entry_size
3961 - htab->plt.has_plt0);
3962 off = (plt_index + 3) * 4;
3963 base_got = htab->elf.sgotplt;
3967 plt_index = h->plt.offset / plt_entry_size;
3968 off = plt_index * 4;
3969 base_got = htab->elf.igotplt;
3972 if (h->dynindx == -1
3976 /* This references the local defitionion. We must
3977 initialize this entry in the global offset table.
3978 Since the offset must always be a multiple of 8,
3979 we use the least significant bit to record
3980 whether we have initialized it already.
3982 When doing a dynamic link, we create a .rela.got
3983 relocation entry to initialize the value. This
3984 is done in the finish_dynamic_symbol routine. */
3989 bfd_put_32 (output_bfd, relocation,
3990 base_got->contents + off);
3998 relocation = (base_got->output_section->vma
3999 + base_got->output_offset + off
4000 - gotplt->output_section->vma
4001 - gotplt->output_offset);
4003 if (rel->r_offset > 1
4004 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
4005 && *(contents + rel->r_offset - 2) != 0x8d)
4007 if (bfd_link_pic (info))
4008 goto disallow_got32;
4010 /* Add the GOT base if there is no base register. */
4011 relocation += (gotplt->output_section->vma
4012 + gotplt->output_offset);
4014 else if (htab->elf.splt == NULL)
4016 /* Adjust for static executables. */
4017 relocation += gotplt->output_offset;
4023 if (h->plt.offset == (bfd_vma) -1)
4025 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4026 if (r_type == R_386_32
4027 && (input_section->flags & SEC_CODE) == 0)
4028 goto do_ifunc_pointer;
4029 goto bad_ifunc_reloc;
4032 relocation = (plt->output_section->vma
4033 + plt->output_offset + h->plt.offset);
4039 if (h->root.root.string)
4040 name = h->root.root.string;
4042 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4045 /* xgettext:c-format */
4046 (_("%B: relocation %s against STT_GNU_IFUNC "
4047 "symbol `%s' isn't supported"), input_bfd,
4049 bfd_set_error (bfd_error_bad_value);
4053 /* Generate dynamic relcoation only when there is a
4054 non-GOT reference in a shared object. */
4055 if ((bfd_link_pic (info) && h->non_got_ref)
4056 || h->plt.offset == (bfd_vma) -1)
4058 Elf_Internal_Rela outrel;
4063 /* Need a dynamic relocation to get the real function
4065 offset = _bfd_elf_section_offset (output_bfd,
4069 if (offset == (bfd_vma) -1
4070 || offset == (bfd_vma) -2)
4073 outrel.r_offset = (input_section->output_section->vma
4074 + input_section->output_offset
4077 if (h->dynindx == -1
4079 || bfd_link_executable (info))
4081 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4082 h->root.root.string,
4083 h->root.u.def.section->owner);
4085 /* This symbol is resolved locally. */
4086 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4087 bfd_put_32 (output_bfd,
4088 (h->root.u.def.value
4089 + h->root.u.def.section->output_section->vma
4090 + h->root.u.def.section->output_offset),
4094 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4096 /* Dynamic relocations are stored in
4097 1. .rel.ifunc section in PIC object.
4098 2. .rel.got section in dynamic executable.
4099 3. .rel.iplt section in static executable. */
4100 if (bfd_link_pic (info))
4101 sreloc = htab->elf.irelifunc;
4102 else if (htab->elf.splt != NULL)
4103 sreloc = htab->elf.srelgot;
4105 sreloc = htab->elf.irelplt;
4106 elf_append_rel (output_bfd, sreloc, &outrel);
4108 /* If this reloc is against an external symbol, we
4109 do not want to fiddle with the addend. Otherwise,
4110 we need to include the symbol value so that it
4111 becomes an addend for the dynamic reloc. For an
4112 internal symbol, we have updated addend. */
4121 relocation -= (gotplt->output_section->vma
4122 + gotplt->output_offset);
4127 eh = (struct elf_i386_link_hash_entry *) h;
4128 resolved_to_zero = (eh != NULL
4129 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4136 /* Avoid optimizing _DYNAMIC since ld.so may use its
4137 link-time address. */
4138 if (h == htab->elf.hdynamic)
4141 if (bfd_link_pic (info))
4143 /* It is OK to convert mov to lea and convert indirect
4144 branch to direct branch. It is OK to convert adc,
4145 add, and, cmp, or, sbb, sub, test, xor only when PIC
4147 unsigned int opcode, addend;
4148 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
4151 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4152 if (opcode != 0x8b && opcode != 0xff)
4156 /* Resolve "mov GOT[(%reg)], %reg",
4157 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4158 and "binop foo@GOT[(%reg)], %reg". */
4160 || (h->plt.offset == (bfd_vma) -1
4161 && h->got.offset == (bfd_vma) -1)
4162 || htab->elf.sgotplt == NULL)
4165 offplt = (htab->elf.sgotplt->output_section->vma
4166 + htab->elf.sgotplt->output_offset);
4168 /* It is relative to .got.plt section. */
4169 if (h->got.offset != (bfd_vma) -1)
4170 /* Use GOT entry. Mask off the least significant bit in
4171 GOT offset which may be set by R_386_GOT32 processing
4173 relocation = (htab->elf.sgot->output_section->vma
4174 + htab->elf.sgot->output_offset
4175 + (h->got.offset & ~1) - offplt);
4177 /* Use GOTPLT entry. */
4178 relocation = (h->plt.offset / plt_entry_size
4179 - htab->plt.has_plt0 + 3) * 4;
4181 if (!bfd_link_pic (info))
4183 /* If not PIC, add the .got.plt section address for
4184 baseless addressing. */
4186 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4187 if ((modrm & 0xc7) == 0x5)
4188 relocation += offplt;
4191 unresolved_reloc = FALSE;
4196 /* Relocation is to the entry for this symbol in the global
4198 if (htab->elf.sgot == NULL)
4201 relative_reloc = FALSE;
4206 off = h->got.offset;
4207 dyn = htab->elf.dynamic_sections_created;
4208 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4209 bfd_link_pic (info),
4211 || (bfd_link_pic (info)
4212 && SYMBOL_REFERENCES_LOCAL (info, h))
4213 || (ELF_ST_VISIBILITY (h->other)
4214 && h->root.type == bfd_link_hash_undefweak))
4216 /* This is actually a static link, or it is a
4217 -Bsymbolic link and the symbol is defined
4218 locally, or the symbol was forced to be local
4219 because of a version file. We must initialize
4220 this entry in the global offset table. Since the
4221 offset must always be a multiple of 4, we use the
4222 least significant bit to record whether we have
4223 initialized it already.
4225 When doing a dynamic link, we create a .rel.got
4226 relocation entry to initialize the value. This
4227 is done in the finish_dynamic_symbol routine. */
4232 bfd_put_32 (output_bfd, relocation,
4233 htab->elf.sgot->contents + off);
4236 if (h->dynindx == -1
4238 && h->root.type != bfd_link_hash_undefweak
4239 && bfd_link_pic (info))
4241 /* PR ld/21402: If this symbol isn't dynamic
4242 in PIC, generate R_386_RELATIVE here. */
4243 eh->no_finish_dynamic_symbol = 1;
4244 relative_reloc = TRUE;
4249 unresolved_reloc = FALSE;
4253 if (local_got_offsets == NULL)
4256 off = local_got_offsets[r_symndx];
4258 /* The offset must always be a multiple of 4. We use
4259 the least significant bit to record whether we have
4260 already generated the necessary reloc. */
4265 bfd_put_32 (output_bfd, relocation,
4266 htab->elf.sgot->contents + off);
4267 local_got_offsets[r_symndx] |= 1;
4269 if (bfd_link_pic (info))
4270 relative_reloc = TRUE;
4277 Elf_Internal_Rela outrel;
4279 s = htab->elf.srelgot;
4283 outrel.r_offset = (htab->elf.sgot->output_section->vma
4284 + htab->elf.sgot->output_offset
4286 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4287 elf_append_rel (output_bfd, s, &outrel);
4290 if (off >= (bfd_vma) -2)
4293 relocation = (htab->elf.sgot->output_section->vma
4294 + htab->elf.sgot->output_offset + off);
4295 if (rel->r_offset > 1
4296 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
4297 && *(contents + rel->r_offset - 2) != 0x8d)
4299 if (bfd_link_pic (info))
4301 /* For PIC, disallow R_386_GOT32 without a base
4302 register, except for "lea foo@GOT, %reg", since
4303 we don't know what the GOT base is. */
4307 if (h == NULL || h->root.root.string == NULL)
4308 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4311 name = h->root.root.string;
4314 /* xgettext:c-format */
4315 (_("%B: direct GOT relocation %s against `%s'"
4316 " without base register can not be used"
4317 " when making a shared object"),
4318 input_bfd, howto->name, name);
4319 bfd_set_error (bfd_error_bad_value);
4325 /* Subtract the .got.plt section address only with a base
4327 relocation -= (htab->elf.sgotplt->output_section->vma
4328 + htab->elf.sgotplt->output_offset);
4334 /* Relocation is relative to the start of the global offset
4337 /* Check to make sure it isn't a protected function or data
4338 symbol for shared library since it may not be local when
4339 used as function address or with copy relocation. We also
4340 need to make sure that a symbol is referenced locally. */
4341 if (!bfd_link_executable (info) && h)
4343 if (!h->def_regular)
4347 switch (ELF_ST_VISIBILITY (h->other))
4350 v = _("hidden symbol");
4353 v = _("internal symbol");
4356 v = _("protected symbol");
4364 /* xgettext:c-format */
4365 (_("%B: relocation R_386_GOTOFF against undefined %s"
4366 " `%s' can not be used when making a shared object"),
4367 input_bfd, v, h->root.root.string);
4368 bfd_set_error (bfd_error_bad_value);
4371 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
4372 && (h->type == STT_FUNC
4373 || h->type == STT_OBJECT)
4374 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4377 /* xgettext:c-format */
4378 (_("%B: relocation R_386_GOTOFF against protected %s"
4379 " `%s' can not be used when making a shared object"),
4381 h->type == STT_FUNC ? "function" : "data",
4382 h->root.root.string);
4383 bfd_set_error (bfd_error_bad_value);
4388 /* Note that sgot is not involved in this
4389 calculation. We always want the start of .got.plt. If we
4390 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4391 permitted by the ABI, we might have to change this
4393 relocation -= htab->elf.sgotplt->output_section->vma
4394 + htab->elf.sgotplt->output_offset;
4398 /* Use global offset table as symbol value. */
4399 relocation = htab->elf.sgotplt->output_section->vma
4400 + htab->elf.sgotplt->output_offset;
4401 unresolved_reloc = FALSE;
4405 /* Relocation is to the entry for this symbol in the
4406 procedure linkage table. */
4408 /* Resolve a PLT32 reloc against a local symbol directly,
4409 without using the procedure linkage table. */
4413 if ((h->plt.offset == (bfd_vma) -1
4414 && eh->plt_got.offset == (bfd_vma) -1)
4415 || htab->elf.splt == NULL)
4417 /* We didn't make a PLT entry for this symbol. This
4418 happens when statically linking PIC code, or when
4419 using -Bsymbolic. */
4423 if (h->plt.offset != (bfd_vma) -1)
4425 resolved_plt = htab->elf.splt;
4426 plt_offset = h->plt.offset;
4430 resolved_plt = htab->plt_got;
4431 plt_offset = eh->plt_got.offset;
4434 relocation = (resolved_plt->output_section->vma
4435 + resolved_plt->output_offset
4437 unresolved_reloc = FALSE;
4441 /* Set to symbol size. */
4442 relocation = st_size;
4447 if ((input_section->flags & SEC_ALLOC) == 0
4451 /* Copy dynamic function pointer relocations. Don't generate
4452 dynamic relocations against resolved undefined weak symbols
4453 in PIE, except for R_386_PC32. */
4454 if ((bfd_link_pic (info)
4456 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4457 && (!resolved_to_zero
4458 || r_type == R_386_PC32))
4459 || h->root.type != bfd_link_hash_undefweak))
4460 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
4461 || !SYMBOL_CALLS_LOCAL (info, h)))
4462 || (ELIMINATE_COPY_RELOCS
4463 && !bfd_link_pic (info)
4467 || eh->func_pointer_refcount > 0
4468 || (h->root.type == bfd_link_hash_undefweak
4469 && !resolved_to_zero))
4470 && ((h->def_dynamic && !h->def_regular)
4471 /* Undefined weak symbol is bound locally when
4473 || h->root.type == bfd_link_hash_undefweak)))
4475 Elf_Internal_Rela outrel;
4476 bfd_boolean skip, relocate;
4479 /* When generating a shared object, these relocations
4480 are copied into the output file to be resolved at run
4487 _bfd_elf_section_offset (output_bfd, info, input_section,
4489 if (outrel.r_offset == (bfd_vma) -1)
4491 else if (outrel.r_offset == (bfd_vma) -2)
4492 skip = TRUE, relocate = TRUE;
4493 outrel.r_offset += (input_section->output_section->vma
4494 + input_section->output_offset);
4497 memset (&outrel, 0, sizeof outrel);
4500 && (r_type == R_386_PC32
4501 || !(bfd_link_executable (info)
4502 || SYMBOLIC_BIND (info, h))
4503 || !h->def_regular))
4504 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4507 /* This symbol is local, or marked to become local. */
4509 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4512 sreloc = elf_section_data (input_section)->sreloc;
4514 if (sreloc == NULL || sreloc->contents == NULL)
4516 r = bfd_reloc_notsupported;
4517 goto check_relocation_error;
4520 elf_append_rel (output_bfd, sreloc, &outrel);
4522 /* If this reloc is against an external symbol, we do
4523 not want to fiddle with the addend. Otherwise, we
4524 need to include the symbol value so that it becomes
4525 an addend for the dynamic reloc. */
4532 if (!bfd_link_executable (info))
4534 Elf_Internal_Rela outrel;
4537 outrel.r_offset = rel->r_offset
4538 + input_section->output_section->vma
4539 + input_section->output_offset;
4540 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4541 sreloc = elf_section_data (input_section)->sreloc;
4544 elf_append_rel (output_bfd, sreloc, &outrel);
4549 case R_386_TLS_GOTDESC:
4550 case R_386_TLS_DESC_CALL:
4551 case R_386_TLS_IE_32:
4552 case R_386_TLS_GOTIE:
4553 tls_type = GOT_UNKNOWN;
4554 if (h == NULL && local_got_offsets)
4555 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
4557 tls_type = elf_i386_hash_entry(h)->tls_type;
4558 if (tls_type == GOT_TLS_IE)
4559 tls_type = GOT_TLS_IE_NEG;
4561 if (! elf_i386_tls_transition (info, input_bfd,
4562 input_section, contents,
4563 symtab_hdr, sym_hashes,
4564 &r_type, tls_type, rel,
4565 relend, h, r_symndx, TRUE))
4568 if (r_type == R_386_TLS_LE_32)
4570 BFD_ASSERT (! unresolved_reloc);
4571 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4576 /* GD->LE transition. */
4577 type = *(contents + rel->r_offset - 2);
4581 leal foo@tlsgd(,%ebx,1), %eax
4582 call ___tls_get_addr@PLT
4585 subl $foo@tpoff, %eax
4586 (6 byte form of subl). */
4587 roff = rel->r_offset + 5;
4592 leal foo@tlsgd(%ebx), %eax
4593 call ___tls_get_addr@PLT
4596 leal foo@tlsgd(%reg), %eax
4597 call *___tls_get_addr@GOT(%reg)
4598 which may be converted to
4599 addr32 call ___tls_get_addr
4601 movl %gs:0, %eax; subl $foo@tpoff, %eax
4602 (6 byte form of subl). */
4603 roff = rel->r_offset + 6;
4605 memcpy (contents + roff - 8,
4606 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4607 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4609 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
4614 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4616 /* GDesc -> LE transition.
4617 It's originally something like:
4618 leal x@tlsdesc(%ebx), %eax
4622 Registers other than %eax may be set up here. */
4627 roff = rel->r_offset;
4628 val = bfd_get_8 (input_bfd, contents + roff - 1);
4630 /* Now modify the instruction as appropriate. */
4631 /* aoliva FIXME: remove the above and xor the byte
4633 bfd_put_8 (output_bfd, val ^ 0x86,
4634 contents + roff - 1);
4635 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4639 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4641 /* GDesc -> LE transition.
4649 roff = rel->r_offset;
4650 bfd_put_8 (output_bfd, 0x66, contents + roff);
4651 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4654 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4658 /* IE->LE transition:
4659 Originally it can be one of:
4667 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4670 /* movl foo, %eax. */
4671 bfd_put_8 (output_bfd, 0xb8,
4672 contents + rel->r_offset - 1);
4678 type = bfd_get_8 (input_bfd,
4679 contents + rel->r_offset - 2);
4684 bfd_put_8 (output_bfd, 0xc7,
4685 contents + rel->r_offset - 2);
4686 bfd_put_8 (output_bfd,
4687 0xc0 | ((val >> 3) & 7),
4688 contents + rel->r_offset - 1);
4692 bfd_put_8 (output_bfd, 0x81,
4693 contents + rel->r_offset - 2);
4694 bfd_put_8 (output_bfd,
4695 0xc0 | ((val >> 3) & 7),
4696 contents + rel->r_offset - 1);
4703 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4704 contents + rel->r_offset);
4709 unsigned int val, type;
4711 /* {IE_32,GOTIE}->LE transition:
4712 Originally it can be one of:
4713 subl foo(%reg1), %reg2
4714 movl foo(%reg1), %reg2
4715 addl foo(%reg1), %reg2
4718 movl $foo, %reg2 (6 byte form)
4719 addl $foo, %reg2. */
4720 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4721 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4725 bfd_put_8 (output_bfd, 0xc7,
4726 contents + rel->r_offset - 2);
4727 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4728 contents + rel->r_offset - 1);
4730 else if (type == 0x2b)
4733 bfd_put_8 (output_bfd, 0x81,
4734 contents + rel->r_offset - 2);
4735 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4736 contents + rel->r_offset - 1);
4738 else if (type == 0x03)
4741 bfd_put_8 (output_bfd, 0x81,
4742 contents + rel->r_offset - 2);
4743 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4744 contents + rel->r_offset - 1);
4748 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4749 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4750 contents + rel->r_offset);
4752 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4753 contents + rel->r_offset);
4758 if (htab->elf.sgot == NULL)
4763 off = h->got.offset;
4764 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4768 if (local_got_offsets == NULL)
4771 off = local_got_offsets[r_symndx];
4772 offplt = local_tlsdesc_gotents[r_symndx];
4779 Elf_Internal_Rela outrel;
4783 if (htab->elf.srelgot == NULL)
4786 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4788 if (GOT_TLS_GDESC_P (tls_type))
4791 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4792 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4793 <= htab->elf.sgotplt->size);
4794 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4795 + htab->elf.sgotplt->output_offset
4797 + htab->sgotplt_jump_table_size);
4798 sreloc = htab->elf.srelplt;
4799 loc = sreloc->contents;
4800 loc += (htab->next_tls_desc_index++
4801 * sizeof (Elf32_External_Rel));
4802 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4803 <= sreloc->contents + sreloc->size);
4804 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4807 BFD_ASSERT (! unresolved_reloc);
4808 bfd_put_32 (output_bfd,
4809 relocation - elf_i386_dtpoff_base (info),
4810 htab->elf.sgotplt->contents + offplt
4811 + htab->sgotplt_jump_table_size + 4);
4815 bfd_put_32 (output_bfd, 0,
4816 htab->elf.sgotplt->contents + offplt
4817 + htab->sgotplt_jump_table_size + 4);
4821 sreloc = htab->elf.srelgot;
4823 outrel.r_offset = (htab->elf.sgot->output_section->vma
4824 + htab->elf.sgot->output_offset + off);
4826 if (GOT_TLS_GD_P (tls_type))
4827 dr_type = R_386_TLS_DTPMOD32;
4828 else if (GOT_TLS_GDESC_P (tls_type))
4830 else if (tls_type == GOT_TLS_IE_POS)
4831 dr_type = R_386_TLS_TPOFF;
4833 dr_type = R_386_TLS_TPOFF32;
4835 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4836 bfd_put_32 (output_bfd,
4837 relocation - elf_i386_dtpoff_base (info),
4838 htab->elf.sgot->contents + off);
4839 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4840 bfd_put_32 (output_bfd,
4841 elf_i386_dtpoff_base (info) - relocation,
4842 htab->elf.sgot->contents + off);
4843 else if (dr_type != R_386_TLS_DESC)
4844 bfd_put_32 (output_bfd, 0,
4845 htab->elf.sgot->contents + off);
4846 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4848 elf_append_rel (output_bfd, sreloc, &outrel);
4850 if (GOT_TLS_GD_P (tls_type))
4854 BFD_ASSERT (! unresolved_reloc);
4855 bfd_put_32 (output_bfd,
4856 relocation - elf_i386_dtpoff_base (info),
4857 htab->elf.sgot->contents + off + 4);
4861 bfd_put_32 (output_bfd, 0,
4862 htab->elf.sgot->contents + off + 4);
4863 outrel.r_info = ELF32_R_INFO (indx,
4864 R_386_TLS_DTPOFF32);
4865 outrel.r_offset += 4;
4866 elf_append_rel (output_bfd, sreloc, &outrel);
4869 else if (tls_type == GOT_TLS_IE_BOTH)
4871 bfd_put_32 (output_bfd,
4873 ? relocation - elf_i386_dtpoff_base (info)
4875 htab->elf.sgot->contents + off + 4);
4876 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4877 outrel.r_offset += 4;
4878 elf_append_rel (output_bfd, sreloc, &outrel);
4885 local_got_offsets[r_symndx] |= 1;
4888 if (off >= (bfd_vma) -2
4889 && ! GOT_TLS_GDESC_P (tls_type))
4891 if (r_type == R_386_TLS_GOTDESC
4892 || r_type == R_386_TLS_DESC_CALL)
4894 relocation = htab->sgotplt_jump_table_size + offplt;
4895 unresolved_reloc = FALSE;
4897 else if (r_type == ELF32_R_TYPE (rel->r_info))
4899 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4900 + htab->elf.sgotplt->output_offset;
4901 relocation = htab->elf.sgot->output_section->vma
4902 + htab->elf.sgot->output_offset + off - g_o_t;
4903 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4904 && tls_type == GOT_TLS_IE_BOTH)
4906 if (r_type == R_386_TLS_IE)
4907 relocation += g_o_t;
4908 unresolved_reloc = FALSE;
4910 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4912 unsigned int val, type;
4915 /* GD->IE transition. */
4916 type = *(contents + rel->r_offset - 2);
4917 val = *(contents + rel->r_offset - 1);
4921 leal foo@tlsgd(,%ebx,1), %eax
4922 call ___tls_get_addr@PLT
4925 subl $foo@gottpoff(%ebx), %eax. */
4927 roff = rel->r_offset - 3;
4932 leal foo@tlsgd(%ebx), %eax
4933 call ___tls_get_addr@PLT
4936 leal foo@tlsgd(%reg), %eax
4937 call *___tls_get_addr@GOT(%reg)
4938 which may be converted to
4939 addr32 call ___tls_get_addr
4942 subl $foo@gottpoff(%reg), %eax. */
4943 roff = rel->r_offset - 2;
4945 memcpy (contents + roff,
4946 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4947 contents[roff + 7] = 0x80 | (val & 7);
4948 /* If foo is used only with foo@gotntpoff(%reg) and
4949 foo@indntpoff, but not with foo@gottpoff(%reg), change
4950 subl $foo@gottpoff(%reg), %eax
4952 addl $foo@gotntpoff(%reg), %eax. */
4953 if (tls_type == GOT_TLS_IE_POS)
4954 contents[roff + 6] = 0x03;
4955 bfd_put_32 (output_bfd,
4956 htab->elf.sgot->output_section->vma
4957 + htab->elf.sgot->output_offset + off
4958 - htab->elf.sgotplt->output_section->vma
4959 - htab->elf.sgotplt->output_offset,
4960 contents + roff + 8);
4961 /* Skip R_386_PLT32 and R_386_GOT32X. */
4966 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4968 /* GDesc -> IE transition.
4969 It's originally something like:
4970 leal x@tlsdesc(%ebx), %eax
4973 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4975 movl x@gottpoff(%ebx), %eax # before negl %eax
4977 Registers other than %eax may be set up here. */
4981 /* First, make sure it's a leal adding ebx to a 32-bit
4982 offset into any register, although it's probably
4983 almost always going to be eax. */
4984 roff = rel->r_offset;
4986 /* Now modify the instruction as appropriate. */
4987 /* To turn a leal into a movl in the form we use it, it
4988 suffices to change the first byte from 0x8d to 0x8b.
4989 aoliva FIXME: should we decide to keep the leal, all
4990 we have to do is remove the statement below, and
4991 adjust the relaxation of R_386_TLS_DESC_CALL. */
4992 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4994 if (tls_type == GOT_TLS_IE_BOTH)
4997 bfd_put_32 (output_bfd,
4998 htab->elf.sgot->output_section->vma
4999 + htab->elf.sgot->output_offset + off
5000 - htab->elf.sgotplt->output_section->vma
5001 - htab->elf.sgotplt->output_offset,
5005 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
5007 /* GDesc -> IE transition.
5015 depending on how we transformed the TLS_GOTDESC above.
5020 roff = rel->r_offset;
5022 /* Now modify the instruction as appropriate. */
5023 if (tls_type != GOT_TLS_IE_NEG)
5026 bfd_put_8 (output_bfd, 0x66, contents + roff);
5027 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
5032 bfd_put_8 (output_bfd, 0xf7, contents + roff);
5033 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
5043 if (! elf_i386_tls_transition (info, input_bfd,
5044 input_section, contents,
5045 symtab_hdr, sym_hashes,
5046 &r_type, GOT_UNKNOWN, rel,
5047 relend, h, r_symndx, TRUE))
5050 if (r_type != R_386_TLS_LDM)
5052 /* LD->LE transition. Change
5053 leal foo@tlsldm(%ebx) %eax
5054 call ___tls_get_addr@PLT
5058 leal 0(%esi,1), %esi
5060 leal foo@tlsldm(%reg) %eax
5061 call *___tls_get_addr@GOT(%reg)
5062 which may be converted to
5063 addr32 call ___tls_get_addr
5066 leal 0(%esi), %esi */
5067 BFD_ASSERT (r_type == R_386_TLS_LE_32);
5068 if (*(contents + rel->r_offset + 4) == 0xff
5069 || *(contents + rel->r_offset + 4) == 0x67)
5070 memcpy (contents + rel->r_offset - 2,
5071 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
5073 memcpy (contents + rel->r_offset - 2,
5074 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
5075 /* Skip R_386_PC32/R_386_PLT32. */
5081 if (htab->elf.sgot == NULL)
5084 off = htab->tls_ldm_got.offset;
5089 Elf_Internal_Rela outrel;
5091 if (htab->elf.srelgot == NULL)
5094 outrel.r_offset = (htab->elf.sgot->output_section->vma
5095 + htab->elf.sgot->output_offset + off);
5097 bfd_put_32 (output_bfd, 0,
5098 htab->elf.sgot->contents + off);
5099 bfd_put_32 (output_bfd, 0,
5100 htab->elf.sgot->contents + off + 4);
5101 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
5102 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
5103 htab->tls_ldm_got.offset |= 1;
5105 relocation = htab->elf.sgot->output_section->vma
5106 + htab->elf.sgot->output_offset + off
5107 - htab->elf.sgotplt->output_section->vma
5108 - htab->elf.sgotplt->output_offset;
5109 unresolved_reloc = FALSE;
5112 case R_386_TLS_LDO_32:
5113 if (!bfd_link_executable (info)
5114 || (input_section->flags & SEC_CODE) == 0)
5115 relocation -= elf_i386_dtpoff_base (info);
5117 /* When converting LDO to LE, we must negate. */
5118 relocation = -elf_i386_tpoff (info, relocation);
5121 case R_386_TLS_LE_32:
5123 if (!bfd_link_executable (info))
5125 Elf_Internal_Rela outrel;
5128 outrel.r_offset = rel->r_offset
5129 + input_section->output_section->vma
5130 + input_section->output_offset;
5131 if (h != NULL && h->dynindx != -1)
5135 if (r_type == R_386_TLS_LE_32)
5136 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
5138 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
5139 sreloc = elf_section_data (input_section)->sreloc;
5142 elf_append_rel (output_bfd, sreloc, &outrel);
5145 else if (r_type == R_386_TLS_LE_32)
5146 relocation = elf_i386_dtpoff_base (info) - relocation;
5148 relocation -= elf_i386_dtpoff_base (info);
5150 else if (r_type == R_386_TLS_LE_32)
5151 relocation = elf_i386_tpoff (info, relocation);
5153 relocation = -elf_i386_tpoff (info, relocation);
5160 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5161 because such sections are not SEC_ALLOC and thus ld.so will
5162 not process them. */
5163 if (unresolved_reloc
5164 && !((input_section->flags & SEC_DEBUGGING) != 0
5166 && _bfd_elf_section_offset (output_bfd, info, input_section,
5167 rel->r_offset) != (bfd_vma) -1)
5170 /* xgettext:c-format */
5171 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5174 (long) rel->r_offset,
5176 h->root.root.string);
5181 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5182 contents, rel->r_offset,
5185 check_relocation_error:
5186 if (r != bfd_reloc_ok)
5191 name = h->root.root.string;
5194 name = bfd_elf_string_from_elf_section (input_bfd,
5195 symtab_hdr->sh_link,
5200 name = bfd_section_name (input_bfd, sec);
5203 if (r == bfd_reloc_overflow)
5204 (*info->callbacks->reloc_overflow)
5205 (info, (h ? &h->root : NULL), name, howto->name,
5206 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5210 /* xgettext:c-format */
5211 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5212 input_bfd, input_section,
5213 (long) rel->r_offset, name, (int) r);
5224 Elf_Internal_Shdr *rel_hdr;
5225 size_t deleted = rel - wrel;
5227 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5228 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5229 if (rel_hdr->sh_size == 0)
5231 /* It is too late to remove an empty reloc section. Leave
5233 ??? What is wrong with an empty section??? */
5234 rel_hdr->sh_size = rel_hdr->sh_entsize;
5237 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5238 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5239 input_section->reloc_count -= deleted;
5245 /* Finish up dynamic symbol handling. We set the contents of various
5246 dynamic sections here. */
5249 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
5250 struct bfd_link_info *info,
5251 struct elf_link_hash_entry *h,
5252 Elf_Internal_Sym *sym)
5254 struct elf_i386_link_hash_table *htab;
5255 unsigned plt_entry_size;
5256 const struct elf_i386_backend_data *abed;
5257 struct elf_i386_link_hash_entry *eh;
5258 bfd_boolean local_undefweak;
5260 htab = elf_i386_hash_table (info);
5264 abed = get_elf_i386_backend_data (output_bfd);
5265 plt_entry_size = htab->plt.plt_entry_size;
5267 eh = (struct elf_i386_link_hash_entry *) h;
5268 if (eh->no_finish_dynamic_symbol)
5271 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5272 resolved undefined weak symbols in executable so that their
5273 references have value 0 at run-time. */
5274 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
5278 if (h->plt.offset != (bfd_vma) -1)
5282 Elf_Internal_Rela rel;
5284 asection *plt, *gotplt, *relplt;
5286 /* When building a static executable, use .iplt, .igot.plt and
5287 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5288 if (htab->elf.splt != NULL)
5290 plt = htab->elf.splt;
5291 gotplt = htab->elf.sgotplt;
5292 relplt = htab->elf.srelplt;
5296 plt = htab->elf.iplt;
5297 gotplt = htab->elf.igotplt;
5298 relplt = htab->elf.irelplt;
5301 /* This symbol has an entry in the procedure linkage table. Set
5304 if ((h->dynindx == -1
5306 && !((h->forced_local || bfd_link_executable (info))
5308 && h->type == STT_GNU_IFUNC))
5314 /* Get the index in the procedure linkage table which
5315 corresponds to this symbol. This is the index of this symbol
5316 in all the symbols for which we are making plt entries. The
5317 first entry in the procedure linkage table is reserved.
5319 Get the offset into the .got table of the entry that
5320 corresponds to this function. Each .got entry is 4 bytes.
5321 The first three are reserved.
5323 For static executables, we don't reserve anything. */
5325 if (plt == htab->elf.splt)
5327 got_offset = (h->plt.offset / plt_entry_size
5328 - htab->plt.has_plt0);
5329 got_offset = (got_offset + 3) * 4;
5333 got_offset = h->plt.offset / plt_entry_size;
5334 got_offset = got_offset * 4;
5337 /* Fill in the entry in the procedure linkage table and update
5339 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
5341 if (! bfd_link_pic (info))
5343 bfd_put_32 (output_bfd,
5344 (gotplt->output_section->vma
5345 + gotplt->output_offset
5347 plt->contents + h->plt.offset
5348 + htab->plt.plt_got_offset);
5350 if (abed->os == is_vxworks)
5352 int s, k, reloc_index;
5354 /* Create the R_386_32 relocation referencing the GOT
5355 for this PLT entry. */
5357 /* S: Current slot number (zero-based). */
5358 s = ((h->plt.offset - htab->plt.plt_entry_size)
5359 / htab->plt.plt_entry_size);
5360 /* K: Number of relocations for PLTResolve. */
5361 if (bfd_link_pic (info))
5362 k = PLTRESOLVE_RELOCS_SHLIB;
5364 k = PLTRESOLVE_RELOCS;
5365 /* Skip the PLTresolve relocations, and the relocations for
5366 the other PLT slots. */
5367 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
5368 loc = (htab->srelplt2->contents + reloc_index
5369 * sizeof (Elf32_External_Rel));
5371 rel.r_offset = (htab->elf.splt->output_section->vma
5372 + htab->elf.splt->output_offset
5373 + h->plt.offset + 2),
5374 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5375 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5377 /* Create the R_386_32 relocation referencing the beginning of
5378 the PLT for this GOT entry. */
5379 rel.r_offset = (htab->elf.sgotplt->output_section->vma
5380 + htab->elf.sgotplt->output_offset
5382 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5383 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5384 loc + sizeof (Elf32_External_Rel));
5389 bfd_put_32 (output_bfd, got_offset,
5390 plt->contents + h->plt.offset
5391 + htab->plt.plt_got_offset);
5394 /* Fill in the entry in the global offset table. Leave the entry
5395 as zero for undefined weak symbol in PIE. No PLT relocation
5396 against undefined weak symbol in PIE. */
5397 if (!local_undefweak)
5399 if (htab->plt.has_plt0)
5400 bfd_put_32 (output_bfd,
5401 (plt->output_section->vma
5402 + plt->output_offset
5404 + htab->lazy_plt->plt_lazy_offset),
5405 gotplt->contents + got_offset);
5407 /* Fill in the entry in the .rel.plt section. */
5408 rel.r_offset = (gotplt->output_section->vma
5409 + gotplt->output_offset
5411 if (h->dynindx == -1
5412 || ((bfd_link_executable (info)
5413 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5415 && h->type == STT_GNU_IFUNC))
5417 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5418 h->root.root.string,
5419 h->root.u.def.section->owner);
5421 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5422 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5423 in the .got.plt section. */
5424 bfd_put_32 (output_bfd,
5425 (h->root.u.def.value
5426 + h->root.u.def.section->output_section->vma
5427 + h->root.u.def.section->output_offset),
5428 gotplt->contents + got_offset);
5429 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5430 /* R_386_IRELATIVE comes last. */
5431 plt_index = htab->next_irelative_index--;
5435 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
5436 plt_index = htab->next_jump_slot_index++;
5439 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
5440 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5442 /* Don't fill the second and third slots in PLT entry for
5443 static executables nor without PLT0. */
5444 if (plt == htab->elf.splt && htab->plt.has_plt0)
5446 bfd_put_32 (output_bfd,
5447 plt_index * sizeof (Elf32_External_Rel),
5448 plt->contents + h->plt.offset
5449 + htab->lazy_plt->plt_reloc_offset);
5450 bfd_put_32 (output_bfd,
5452 + htab->lazy_plt->plt_plt_offset + 4),
5453 (plt->contents + h->plt.offset
5454 + htab->lazy_plt->plt_plt_offset));
5458 else if (eh->plt_got.offset != (bfd_vma) -1)
5460 bfd_vma got_offset, plt_offset;
5461 asection *plt, *got, *gotplt;
5462 const bfd_byte *got_plt_entry;
5464 /* Set the entry in the GOT procedure linkage table. */
5465 plt = htab->plt_got;
5466 got = htab->elf.sgot;
5467 gotplt = htab->elf.sgotplt;
5468 got_offset = h->got.offset;
5470 if (got_offset == (bfd_vma) -1
5476 /* Fill in the entry in the GOT procedure linkage table. */
5477 if (! bfd_link_pic (info))
5479 got_plt_entry = htab->non_lazy_plt->plt_entry;
5480 got_offset += got->output_section->vma + got->output_offset;
5484 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
5485 got_offset += (got->output_section->vma
5486 + got->output_offset
5487 - gotplt->output_section->vma
5488 - gotplt->output_offset);
5491 plt_offset = eh->plt_got.offset;
5492 memcpy (plt->contents + plt_offset, got_plt_entry,
5493 htab->non_lazy_plt->plt_entry_size);
5494 bfd_put_32 (output_bfd, got_offset,
5495 (plt->contents + plt_offset
5496 + htab->non_lazy_plt->plt_got_offset));
5499 if (!local_undefweak
5501 && (h->plt.offset != (bfd_vma) -1
5502 || eh->plt_got.offset != (bfd_vma) -1))
5504 /* Mark the symbol as undefined, rather than as defined in
5505 the .plt section. Leave the value if there were any
5506 relocations where pointer equality matters (this is a clue
5507 for the dynamic linker, to make function pointer
5508 comparisons work between an application and shared
5509 library), otherwise set it to zero. If a function is only
5510 called from a binary, there is no need to slow down
5511 shared libraries because of that. */
5512 sym->st_shndx = SHN_UNDEF;
5513 if (!h->pointer_equality_needed)
5517 /* Don't generate dynamic GOT relocation against undefined weak
5518 symbol in executable. */
5519 if (h->got.offset != (bfd_vma) -1
5520 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
5521 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
5522 && !local_undefweak)
5524 Elf_Internal_Rela rel;
5525 asection *relgot = htab->elf.srelgot;
5527 /* This symbol has an entry in the global offset table. Set it
5530 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
5533 rel.r_offset = (htab->elf.sgot->output_section->vma
5534 + htab->elf.sgot->output_offset
5535 + (h->got.offset & ~(bfd_vma) 1));
5537 /* If this is a static link, or it is a -Bsymbolic link and the
5538 symbol is defined locally or was forced to be local because
5539 of a version file, we just want to emit a RELATIVE reloc.
5540 The entry in the global offset table will already have been
5541 initialized in the relocate_section function. */
5543 && h->type == STT_GNU_IFUNC)
5545 if (h->plt.offset == (bfd_vma) -1)
5547 /* STT_GNU_IFUNC is referenced without PLT. */
5548 if (htab->elf.splt == NULL)
5550 /* use .rel[a].iplt section to store .got relocations
5551 in static executable. */
5552 relgot = htab->elf.irelplt;
5554 if (SYMBOL_REFERENCES_LOCAL (info, h))
5556 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
5557 h->root.root.string,
5558 h->root.u.def.section->owner);
5560 bfd_put_32 (output_bfd,
5561 (h->root.u.def.value
5562 + h->root.u.def.section->output_section->vma
5563 + h->root.u.def.section->output_offset),
5564 htab->elf.sgot->contents + h->got.offset);
5565 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5570 else if (bfd_link_pic (info))
5572 /* Generate R_386_GLOB_DAT. */
5579 if (!h->pointer_equality_needed)
5582 /* For non-shared object, we can't use .got.plt, which
5583 contains the real function addres if we need pointer
5584 equality. We load the GOT entry with the PLT entry. */
5585 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
5586 bfd_put_32 (output_bfd,
5587 (plt->output_section->vma
5588 + plt->output_offset + h->plt.offset),
5589 htab->elf.sgot->contents + h->got.offset);
5593 else if (bfd_link_pic (info)
5594 && SYMBOL_REFERENCES_LOCAL (info, h))
5596 BFD_ASSERT((h->got.offset & 1) != 0);
5597 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
5601 BFD_ASSERT((h->got.offset & 1) == 0);
5603 bfd_put_32 (output_bfd, (bfd_vma) 0,
5604 htab->elf.sgot->contents + h->got.offset);
5605 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
5608 elf_append_rel (output_bfd, relgot, &rel);
5613 Elf_Internal_Rela rel;
5616 /* This symbol needs a copy reloc. Set it up. */
5618 if (h->dynindx == -1
5619 || (h->root.type != bfd_link_hash_defined
5620 && h->root.type != bfd_link_hash_defweak)
5621 || htab->elf.srelbss == NULL
5622 || htab->elf.sreldynrelro == NULL)
5625 rel.r_offset = (h->root.u.def.value
5626 + h->root.u.def.section->output_section->vma
5627 + h->root.u.def.section->output_offset);
5628 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
5629 if (h->root.u.def.section == htab->elf.sdynrelro)
5630 s = htab->elf.sreldynrelro;
5632 s = htab->elf.srelbss;
5633 elf_append_rel (output_bfd, s, &rel);
5639 /* Finish up local dynamic symbol handling. We set the contents of
5640 various dynamic sections here. */
5643 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5645 struct elf_link_hash_entry *h
5646 = (struct elf_link_hash_entry *) *slot;
5647 struct bfd_link_info *info
5648 = (struct bfd_link_info *) inf;
5650 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5654 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5655 here since undefined weak symbol may not be dynamic and may not be
5656 called for elf_i386_finish_dynamic_symbol. */
5659 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5662 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5663 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5665 if (h->root.type != bfd_link_hash_undefweak
5666 || h->dynindx != -1)
5669 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5673 /* Used to decide how to sort relocs in an optimal manner for the
5674 dynamic linker, before writing them out. */
5676 static enum elf_reloc_type_class
5677 elf_i386_reloc_type_class (const struct bfd_link_info *info,
5678 const asection *rel_sec ATTRIBUTE_UNUSED,
5679 const Elf_Internal_Rela *rela)
5681 bfd *abfd = info->output_bfd;
5682 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5683 struct elf_link_hash_table *htab = elf_hash_table (info);
5685 if (htab->dynsym != NULL
5686 && htab->dynsym->contents != NULL)
5688 /* Check relocation against STT_GNU_IFUNC symbol if there are
5690 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5691 if (r_symndx != STN_UNDEF)
5693 Elf_Internal_Sym sym;
5694 if (!bed->s->swap_symbol_in (abfd,
5695 (htab->dynsym->contents
5696 + r_symndx * sizeof (Elf32_External_Sym)),
5700 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5701 return reloc_class_ifunc;
5705 switch (ELF32_R_TYPE (rela->r_info))
5707 case R_386_IRELATIVE:
5708 return reloc_class_ifunc;
5709 case R_386_RELATIVE:
5710 return reloc_class_relative;
5711 case R_386_JUMP_SLOT:
5712 return reloc_class_plt;
5714 return reloc_class_copy;
5716 return reloc_class_normal;
5720 /* Finish up the dynamic sections. */
5723 elf_i386_finish_dynamic_sections (bfd *output_bfd,
5724 struct bfd_link_info *info)
5726 struct elf_i386_link_hash_table *htab;
5729 const struct elf_i386_backend_data *abed;
5731 htab = elf_i386_hash_table (info);
5735 dynobj = htab->elf.dynobj;
5736 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5737 abed = get_elf_i386_backend_data (output_bfd);
5739 if (htab->elf.dynamic_sections_created)
5741 Elf32_External_Dyn *dyncon, *dynconend;
5743 if (sdyn == NULL || htab->elf.sgot == NULL)
5746 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5747 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5748 for (; dyncon < dynconend; dyncon++)
5750 Elf_Internal_Dyn dyn;
5753 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5758 if (abed->os == is_vxworks
5759 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5764 s = htab->elf.sgotplt;
5765 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5769 s = htab->elf.srelplt;
5770 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5774 s = htab->elf.srelplt;
5775 dyn.d_un.d_val = s->size;
5779 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5782 if (htab->elf.splt && htab->elf.splt->size > 0)
5784 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5785 really seem like the right value. */
5786 elf_section_data (htab->elf.splt->output_section)
5787 ->this_hdr.sh_entsize = 4;
5789 if (htab->plt.has_plt0)
5791 /* Fill in the special first entry in the procedure linkage
5793 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
5794 htab->lazy_plt->plt0_entry_size);
5795 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
5796 abed->plt0_pad_byte,
5797 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
5798 if (!bfd_link_pic (info))
5800 bfd_put_32 (output_bfd,
5801 (htab->elf.sgotplt->output_section->vma
5802 + htab->elf.sgotplt->output_offset
5804 htab->elf.splt->contents
5805 + htab->lazy_plt->plt0_got1_offset);
5806 bfd_put_32 (output_bfd,
5807 (htab->elf.sgotplt->output_section->vma
5808 + htab->elf.sgotplt->output_offset
5810 htab->elf.splt->contents
5811 + htab->lazy_plt->plt0_got2_offset);
5813 if (abed->os == is_vxworks)
5815 Elf_Internal_Rela rel;
5816 int num_plts = (htab->elf.splt->size
5817 / htab->plt.plt_entry_size) - 1;
5820 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5821 + 4. On IA32 we use REL relocations so the
5822 addend goes in the PLT directly. */
5823 rel.r_offset = (htab->elf.splt->output_section->vma
5824 + htab->elf.splt->output_offset
5825 + htab->lazy_plt->plt0_got1_offset);
5826 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5828 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5829 htab->srelplt2->contents);
5830 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5832 rel.r_offset = (htab->elf.splt->output_section->vma
5833 + htab->elf.splt->output_offset
5834 + htab->lazy_plt->plt0_got2_offset);
5835 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5837 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5838 htab->srelplt2->contents +
5839 sizeof (Elf32_External_Rel));
5840 /* Correct the .rel.plt.unloaded relocations. */
5841 p = htab->srelplt2->contents;
5842 if (bfd_link_pic (info))
5843 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5845 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5847 for (; num_plts; num_plts--)
5849 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5850 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5852 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5853 p += sizeof (Elf32_External_Rel);
5855 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5856 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
5858 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5859 p += sizeof (Elf32_External_Rel);
5866 if (htab->plt_got != NULL && htab->plt_got->size > 0)
5867 elf_section_data (htab->plt_got->output_section)
5868 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
5871 /* Fill in the first three entries in the global offset table. */
5872 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
5874 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5877 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5881 bfd_put_32 (output_bfd,
5883 : sdyn->output_section->vma + sdyn->output_offset),
5884 htab->elf.sgotplt->contents);
5885 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5886 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5888 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5891 /* Adjust .eh_frame for .plt section. */
5892 if (htab->plt_eh_frame != NULL
5893 && htab->plt_eh_frame->contents != NULL)
5895 if (htab->elf.splt != NULL
5896 && htab->elf.splt->size != 0
5897 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5898 && htab->elf.splt->output_section != NULL
5899 && htab->plt_eh_frame->output_section != NULL)
5901 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5902 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5903 + htab->plt_eh_frame->output_offset
5904 + PLT_FDE_START_OFFSET;
5905 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5906 htab->plt_eh_frame->contents
5907 + PLT_FDE_START_OFFSET);
5909 if (htab->plt_eh_frame->sec_info_type
5910 == SEC_INFO_TYPE_EH_FRAME)
5912 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5914 htab->plt_eh_frame->contents))
5919 /* Adjust .eh_frame for .plt.got section. */
5920 if (htab->plt_got_eh_frame != NULL
5921 && htab->plt_got_eh_frame->contents != NULL)
5923 if (htab->plt_got != NULL
5924 && htab->plt_got->size != 0
5925 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
5926 && htab->plt_got->output_section != NULL
5927 && htab->plt_got_eh_frame->output_section != NULL)
5929 bfd_vma plt_start = htab->plt_got->output_section->vma;
5930 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
5931 + htab->plt_got_eh_frame->output_offset
5932 + PLT_FDE_START_OFFSET;
5933 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5934 htab->plt_got_eh_frame->contents
5935 + PLT_FDE_START_OFFSET);
5937 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5939 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5940 htab->plt_got_eh_frame,
5941 htab->plt_got_eh_frame->contents))
5946 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5947 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5949 /* Fill PLT entries for undefined weak symbols in PIE. */
5950 if (bfd_link_pie (info))
5951 bfd_hash_traverse (&info->hash->table,
5952 elf_i386_pie_finish_undefweak_symbol,
5958 /* Fill PLT/GOT entries and allocate dynamic relocations for local
5959 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5960 It has to be done before elf_link_sort_relocs is called so that
5961 dynamic relocations are properly sorted. */
5964 elf_i386_output_arch_local_syms
5965 (bfd *output_bfd ATTRIBUTE_UNUSED,
5966 struct bfd_link_info *info,
5967 void *flaginfo ATTRIBUTE_UNUSED,
5968 int (*func) (void *, const char *,
5971 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
5973 struct elf_i386_link_hash_table *htab = elf_i386_hash_table (info);
5977 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5978 htab_traverse (htab->loc_hash_table,
5979 elf_i386_finish_local_dynamic_symbol,
5985 /* Sort relocs into address order. */
5988 compare_relocs (const void *ap, const void *bp)
5990 const arelent *a = * (const arelent **) ap;
5991 const arelent *b = * (const arelent **) bp;
5993 if (a->address > b->address)
5995 else if (a->address < b->address)
6001 enum elf_i386_plt_type
6014 enum elf_i386_plt_type type;
6015 unsigned int plt_got_offset;
6016 unsigned int plt_entry_size;
6020 /* Forward declaration. */
6021 static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt;
6023 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
6024 dynamic relocations. */
6027 elf_i386_get_synthetic_symtab (bfd *abfd,
6028 long symcount ATTRIBUTE_UNUSED,
6029 asymbol **syms ATTRIBUTE_UNUSED,
6034 long size, count, i, n;
6036 unsigned int plt_got_offset, plt_entry_size;
6038 bfd_byte *plt_contents;
6039 long dynrelcount, relsize;
6040 arelent **dynrelbuf;
6041 const struct elf_i386_lazy_plt_layout *lazy_plt;
6042 const struct elf_i386_non_lazy_plt_layout *non_lazy_plt;
6046 enum elf_i386_plt_type plt_type;
6047 struct elf_i386_plt plts[] =
6049 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0 },
6050 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0 },
6051 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0 }
6056 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
6059 if (dynsymcount <= 0)
6062 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
6066 dynrelbuf = (arelent **) bfd_malloc (relsize);
6067 if (dynrelbuf == NULL)
6070 dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf,
6073 /* Sort the relocs by address. */
6074 qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs);
6076 non_lazy_plt = NULL;
6077 /* Silence GCC 6. */
6079 switch (get_elf_i386_backend_data (abfd)->os)
6082 non_lazy_plt = &elf_i386_non_lazy_plt;
6085 lazy_plt = &elf_i386_lazy_plt;
6088 lazy_plt = &elf_i386_nacl_plt;
6095 for (j = 0; plts[j].name != NULL; j++)
6097 plt = bfd_get_section_by_name (abfd, plts[j].name);
6101 /* Get the PLT section contents. */
6102 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
6103 if (plt_contents == NULL)
6105 if (!bfd_get_section_contents (abfd, (asection *) plt,
6106 plt_contents, 0, plt->size))
6108 free (plt_contents);
6112 /* Check what kind of PLT it is. */
6113 plt_type = plt_unknown;
6114 if (plts[j].type == plt_unknown)
6116 /* Match lazy PLT first. */
6117 if (memcmp (plt_contents, lazy_plt->plt0_entry,
6118 lazy_plt->plt0_got1_offset) == 0)
6119 plt_type = plt_lazy;
6120 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
6121 lazy_plt->plt0_got1_offset) == 0)
6122 plt_type = plt_lazy | plt_pic;
6125 if (non_lazy_plt != NULL
6126 && (plt_type == plt_unknown || plt_type == plt_non_lazy))
6128 /* Match non-lazy PLT. */
6129 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
6130 non_lazy_plt->plt_got_offset) == 0)
6131 plt_type = plt_non_lazy;
6132 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
6133 non_lazy_plt->plt_got_offset) == 0)
6137 if (plt_type == plt_unknown)
6141 plts[j].type = plt_type;
6143 if ((plt_type & plt_lazy))
6145 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
6146 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
6147 /* Skip PLT0 in lazy PLT. */
6152 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
6153 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
6157 n = plt->size / plts[j].plt_entry_size;
6161 plts[j].contents = plt_contents;
6163 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
6164 if ((plt_type & plt_pic))
6165 got_addr = (bfd_vma) -1;
6168 size = count * sizeof (asymbol);
6169 s = *ret = (asymbol *) bfd_zmalloc (size);
6173 for (j = 0; plts[j].name != NULL; j++)
6174 if (plts[j].contents != NULL)
6175 free (plts[j].contents);
6182 /* Check .got.plt and then .got to get the _GLOBAL_OFFSET_TABLE_
6184 asection *sec = bfd_get_section_by_name (abfd, ".got.plt");
6186 got_addr = sec->vma;
6189 sec = bfd_get_section_by_name (abfd, ".got");
6191 got_addr = sec->vma;
6194 if (got_addr == (bfd_vma) -1)
6198 /* Check for each PLT section. */
6201 for (j = 0; plts[j].name != NULL; j++)
6202 if ((plt_contents = plts[j].contents) != NULL)
6207 plt_got_offset = plts[j].plt_got_offset;
6208 plt_entry_size = plts[j].plt_entry_size;
6212 if ((plts[j].type & plt_lazy))
6214 /* Skip PLT0 in lazy PLT. */
6216 offset = plt_entry_size;
6224 /* Check each PLT entry against dynamic relocations. */
6225 for (; k < plts[j].count; k++)
6232 /* Get the GOT offset, a signed 32-bit integer. */
6233 off = H_GET_32 (abfd, (plt_contents + offset
6235 got_vma = got_addr + off;
6237 /* Binary search. */
6241 while ((min + 1) < max)
6245 mid = (min + max) / 2;
6247 if (got_vma > r->address)
6249 else if (got_vma < r->address)
6258 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6259 if (got_vma == p->address
6261 && (p->howto->type == R_386_JUMP_SLOT
6262 || p->howto->type == R_386_GLOB_DAT
6263 || p->howto->type == R_386_IRELATIVE))
6265 *s = **p->sym_ptr_ptr;
6266 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
6267 set. Since we are defining a symbol, ensure one
6269 if ((s->flags & BSF_LOCAL) == 0)
6270 s->flags |= BSF_GLOBAL;
6271 s->flags |= BSF_SYNTHETIC;
6272 /* This is no longer a section symbol. */
6273 s->flags &= ~BSF_SECTION_SYM;
6275 s->the_bfd = plt->owner;
6277 /* Store relocation for later use. */
6279 /* Add @plt to function name later. */
6280 size += strlen (s->name) + sizeof ("@plt");
6282 size += sizeof ("+0x") - 1 + 8;
6286 offset += plt_entry_size;
6290 /* PLT entries with R_386_TLS_DESC relocations are skipped. */
6296 /* Allocate space for @plt suffixes. */
6297 names = (char *) bfd_malloc (size);
6302 for (i = 0; i < count; i++)
6304 /* Add @plt to function name. */
6305 arelent *p = (arelent *) s->udata.p;
6308 size = strlen (s->name);
6309 memcpy (names, s->name, size);
6316 memcpy (names, "+0x", sizeof ("+0x") - 1);
6317 names += sizeof ("+0x") - 1;
6318 bfd_sprintf_vma (abfd, buf, p->addend);
6319 for (a = buf; *a == '0'; ++a)
6322 memcpy (names, a, size);
6325 memcpy (names, "@plt", sizeof ("@plt"));
6326 names += sizeof ("@plt");
6330 for (j = 0; plts[j].name != NULL; j++)
6331 if (plts[j].contents != NULL)
6332 free (plts[j].contents);
6339 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6342 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
6344 if (h->plt.offset != (bfd_vma) -1
6346 && !h->pointer_equality_needed)
6349 return _bfd_elf_hash_symbol (h);
6352 /* Parse i386 GNU properties. */
6354 static enum elf_property_kind
6355 elf_i386_parse_gnu_properties (bfd *abfd, unsigned int type,
6356 bfd_byte *ptr, unsigned int datasz)
6362 case GNU_PROPERTY_X86_ISA_1_USED:
6363 case GNU_PROPERTY_X86_ISA_1_NEEDED:
6367 ((type == GNU_PROPERTY_X86_ISA_1_USED
6368 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
6369 : _("error: %B: <corrupt x86 ISA needed size: 0x%x>")),
6371 return property_corrupt;
6373 prop = _bfd_elf_get_property (abfd, type, datasz);
6374 /* Combine properties of the same type. */
6375 prop->u.number |= bfd_h_get_32 (abfd, ptr);
6376 prop->pr_kind = property_number;
6380 return property_ignored;
6383 return property_number;
6386 /* Merge i386 GNU property BPROP with APROP. If APROP isn't NULL,
6387 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
6388 should be merged with ABFD. */
6391 elf_i386_merge_gnu_properties (bfd *abfd ATTRIBUTE_UNUSED,
6392 elf_property *aprop,
6393 elf_property *bprop)
6395 unsigned int number;
6396 bfd_boolean updated = FALSE;
6397 unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type;
6401 case GNU_PROPERTY_X86_ISA_1_USED:
6402 case GNU_PROPERTY_X86_ISA_1_NEEDED:
6403 if (aprop != NULL && bprop != NULL)
6405 number = aprop->u.number;
6406 aprop->u.number = number | bprop->u.number;
6407 updated = number != (unsigned int) aprop->u.number;
6411 /* Return TRUE if APROP is NULL to indicate that BPROP should
6412 be added to ABFD. */
6413 updated = aprop == NULL;
6418 /* Never should happen. */
6425 /* Set up i386 GNU properties. Return the first relocatable ELF input
6426 with GNU properties if found. Otherwise, return NULL. */
6429 elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
6431 bfd_boolean normal_target;
6432 asection *sec, *pltsec;
6434 unsigned int plt_alignment;
6435 struct elf_i386_link_hash_table *htab;
6436 bfd *pbfd = _bfd_elf_link_setup_gnu_properties (info);
6438 if (bfd_link_relocatable (info))
6441 htab = elf_i386_hash_table (info);
6445 dynobj = htab->elf.dynobj;
6447 /* Set htab->elf.dynobj here so that there is no need to check and
6448 set it in check_relocs. */
6453 /* Find a normal input file to hold linker created
6455 for (abfd = info->input_bfds;
6457 abfd = abfd->link.next)
6459 & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0)
6461 htab->elf.dynobj = abfd;
6467 /* Even when lazy binding is disabled by "-z now", the PLT0 entry may
6468 still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
6469 canonical function address. */
6470 htab->plt.has_plt0 = 1;
6471 normal_target = FALSE;
6473 switch (get_elf_i386_backend_data (info->output_bfd)->os)
6476 htab->lazy_plt = &elf_i386_lazy_plt;
6477 htab->non_lazy_plt = &elf_i386_non_lazy_plt;
6478 normal_target = TRUE;
6481 htab->lazy_plt = &elf_i386_lazy_plt;
6482 htab->non_lazy_plt = NULL;
6483 if (!elf_vxworks_create_dynamic_sections (dynobj, info,
6485 info->callbacks->einfo (_("%F: failed to create VxWorks dynamic sections\n"));
6488 htab->lazy_plt = &elf_i386_nacl_plt;
6489 htab->non_lazy_plt = NULL;
6493 pltsec = htab->elf.splt;
6495 /* If the non-lazy PLT is available, use it for all PLT entries if
6496 there are no PLT0 or no .plt section. */
6497 if (htab->non_lazy_plt != NULL
6498 && (!htab->plt.has_plt0 || pltsec == NULL))
6500 if (bfd_link_pic (info))
6502 = htab->non_lazy_plt->pic_plt_entry;
6505 = htab->non_lazy_plt->plt_entry;
6506 htab->plt.plt_entry_size
6507 = htab->non_lazy_plt->plt_entry_size;
6508 htab->plt.plt_got_offset
6509 = htab->non_lazy_plt->plt_got_offset;
6510 htab->plt.eh_frame_plt_size
6511 = htab->non_lazy_plt->eh_frame_plt_size;
6512 htab->plt.eh_frame_plt
6513 = htab->non_lazy_plt->eh_frame_plt;
6517 if (bfd_link_pic (info))
6519 htab->plt.plt0_entry
6520 = htab->lazy_plt->pic_plt0_entry;
6522 = htab->lazy_plt->pic_plt_entry;
6526 htab->plt.plt0_entry
6527 = htab->lazy_plt->plt0_entry;
6529 = htab->lazy_plt->plt_entry;
6531 htab->plt.plt_entry_size
6532 = htab->lazy_plt->plt_entry_size;
6533 htab->plt.plt_got_offset
6534 = htab->lazy_plt->plt_got_offset;
6535 htab->plt.eh_frame_plt_size
6536 = htab->lazy_plt->eh_frame_plt_size;
6537 htab->plt.eh_frame_plt
6538 = htab->lazy_plt->eh_frame_plt;
6541 /* Return if there are no normal input files. */
6545 /* Since create_dynamic_sections isn't always called, but GOT
6546 relocations need GOT relocations, create them here so that we
6547 don't need to do it in check_relocs. */
6548 if (htab->elf.sgot == NULL
6549 && !_bfd_elf_create_got_section (dynobj, info))
6550 info->callbacks->einfo (_("%F: failed to create GOT sections\n"));
6552 /* Create the ifunc sections here so that check_relocs can be
6554 if (!_bfd_elf_create_ifunc_sections (dynobj, info))
6555 info->callbacks->einfo (_("%F: failed to create ifunc sections\n"));
6557 plt_alignment = bfd_log2 (htab->plt.plt_entry_size);
6561 /* Whe creating executable, set the contents of the .interp
6562 section to the interpreter. */
6563 if (bfd_link_executable (info) && !info->nointerp)
6565 asection *s = bfd_get_linker_section (dynobj, ".interp");
6568 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6569 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6573 /* Don't change PLT section alignment for NaCl since it uses
6574 64-byte PLT entry and sets PLT section alignment to 32
6578 const struct elf_backend_data *bed
6579 = get_elf_backend_data (dynobj);
6580 flagword pltflags = (bed->dynamic_sec_flags
6585 unsigned int non_lazy_plt_alignment
6586 = bfd_log2 (htab->non_lazy_plt->plt_entry_size);
6589 if (!bfd_set_section_alignment (sec->owner, sec,
6591 goto error_alignment;
6593 /* Create the GOT procedure linkage table. */
6594 sec = bfd_make_section_anyway_with_flags (dynobj,
6598 info->callbacks->einfo (_("%F: failed to create GOT PLT section\n"));
6600 if (!bfd_set_section_alignment (dynobj, sec,
6601 non_lazy_plt_alignment))
6602 goto error_alignment;
6604 htab->plt_got = sec;
6607 if (!info->no_ld_generated_unwind_info)
6609 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
6610 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
6611 | SEC_LINKER_CREATED);
6613 sec = bfd_make_section_anyway_with_flags (dynobj,
6617 info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n"));
6619 if (!bfd_set_section_alignment (dynobj, sec, 2))
6620 goto error_alignment;
6622 htab->plt_eh_frame = sec;
6624 if (htab->plt_got != NULL)
6626 sec = bfd_make_section_anyway_with_flags (dynobj,
6630 info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n"));
6632 if (!bfd_set_section_alignment (dynobj, sec, 2))
6633 goto error_alignment;
6635 htab->plt_got_eh_frame = sec;
6642 /* The .iplt section is used for IFUNC symbols in static
6644 sec = htab->elf.iplt;
6646 && !bfd_set_section_alignment (sec->owner, sec,
6650 info->callbacks->einfo (_("%F%A: failed to align section\n"),
6658 #define TARGET_LITTLE_SYM i386_elf32_vec
6659 #define TARGET_LITTLE_NAME "elf32-i386"
6660 #define ELF_ARCH bfd_arch_i386
6661 #define ELF_TARGET_ID I386_ELF_DATA
6662 #define ELF_MACHINE_CODE EM_386
6663 #define ELF_MAXPAGESIZE 0x1000
6665 #define elf_backend_can_gc_sections 1
6666 #define elf_backend_can_refcount 1
6667 #define elf_backend_want_got_plt 1
6668 #define elf_backend_plt_readonly 1
6669 #define elf_backend_want_plt_sym 0
6670 #define elf_backend_got_header_size 12
6671 #define elf_backend_plt_alignment 4
6672 #define elf_backend_dtrel_excludes_plt 1
6673 #define elf_backend_extern_protected_data 1
6674 #define elf_backend_caches_rawsize 1
6675 #define elf_backend_want_dynrelro 1
6677 /* Support RELA for objdump of prelink objects. */
6678 #define elf_info_to_howto elf_i386_info_to_howto_rel
6679 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
6681 #define bfd_elf32_mkobject elf_i386_mkobject
6683 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
6684 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
6685 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
6686 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
6687 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
6689 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
6690 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
6691 #define elf_backend_check_relocs elf_i386_check_relocs
6692 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6693 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
6694 #define elf_backend_fake_sections elf_i386_fake_sections
6695 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
6696 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
6697 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
6698 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
6699 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
6700 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
6701 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
6702 #define elf_backend_relocate_section elf_i386_relocate_section
6703 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
6704 #define elf_backend_always_size_sections elf_i386_always_size_sections
6705 #define elf_backend_omit_section_dynsym \
6706 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
6707 #define elf_backend_hash_symbol elf_i386_hash_symbol
6708 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
6709 #define elf_backend_parse_gnu_properties elf_i386_parse_gnu_properties
6710 #define elf_backend_merge_gnu_properties elf_i386_merge_gnu_properties
6711 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
6713 #include "elf32-target.h"
6715 /* FreeBSD support. */
6717 #undef TARGET_LITTLE_SYM
6718 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
6719 #undef TARGET_LITTLE_NAME
6720 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
6722 #define ELF_OSABI ELFOSABI_FREEBSD
6724 /* The kernel recognizes executables as valid only if they carry a
6725 "FreeBSD" label in the ELF header. So we put this label on all
6726 executables and (for simplicity) also all other object files. */
6729 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
6731 _bfd_elf_post_process_headers (abfd, info);
6733 #ifdef OLD_FREEBSD_ABI_LABEL
6735 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
6736 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
6737 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
6742 #undef elf_backend_post_process_headers
6743 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
6745 #define elf32_bed elf32_i386_fbsd_bed
6747 #undef elf_backend_add_symbol_hook
6749 #include "elf32-target.h"
6753 #undef TARGET_LITTLE_SYM
6754 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
6755 #undef TARGET_LITTLE_NAME
6756 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
6758 #undef elf_backend_post_process_headers
6760 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6761 objects won't be recognized. */
6765 #define elf32_bed elf32_i386_sol2_bed
6767 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6769 #undef elf_backend_static_tls_alignment
6770 #define elf_backend_static_tls_alignment 8
6772 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6774 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6776 #undef elf_backend_want_plt_sym
6777 #define elf_backend_want_plt_sym 1
6779 #undef elf_backend_strtab_flags
6780 #define elf_backend_strtab_flags SHF_STRINGS
6782 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
6783 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
6784 FALSE otherwise. ISECTION is the best guess matching section from the
6785 input bfd IBFD, but it might be NULL. */
6788 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
6789 bfd *obfd ATTRIBUTE_UNUSED,
6790 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
6791 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
6793 /* PR 19938: FIXME: Need to add code for setting the sh_info
6794 and sh_link fields of Solaris specific section types. */
6797 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
6798 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
6800 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
6802 The following values should be set:
6805 -----------------------------------------------------------------------------
6806 SHT_SUNW_ancillary The section header index of 0
6807 [0x6fffffee] the associated string table.
6809 SHT_SUNW_capinfo The section header index of For a dynamic object, the
6810 [0x6ffffff0] the associated symbol table. section header index of
6812 SHT_SUNW_capchain table,
6815 SHT_SUNW_symsort The section header index of 0
6816 [0x6ffffff1] the associated symbol table.
6818 SHT_SUNW_tlssort The section header index of 0
6819 [0x6ffffff2] the associated symbol table.
6821 SHT_SUNW_LDYNSYM The section header index of One greater than the
6822 [0x6ffffff3] the associated string table. symbol table index of the
6823 This index is the same string last local symbol,
6824 table used by the SHT_DYNSYM STB_LOCAL. Since
6825 section. SHT_SUNW_LDYNSYM only
6826 contains local symbols,
6827 sh_info is equivalent to
6828 the number of symbols in
6831 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
6832 [0x6ffffff5] the section header index of to named strings, the
6833 the associated section header index of
6834 SHT_SUNW_capinfo table, the associated string
6835 otherwise 0. table, otherwise 0.
6837 SHT_SUNW_move The section header index of 0
6838 [0x6ffffffa] the associated symbol table.
6843 SHT_SUNW_syminfo The section header index of The section header index
6844 [0x6ffffffc] the associated symbol table. of the associated
6847 SHT_SUNW_verdef The section header index of The number of version
6848 [0x6ffffffd] the associated string table. definitions within the
6851 SHT_SUNW_verneed The section header index of The number of version
6852 [0x6ffffffe] the associated string table. dependencies within the
6855 SHT_SUNW_versym The section header index of 0
6856 [0x6fffffff] the associated symbol table. */
6859 #undef elf_backend_copy_special_section_fields
6860 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
6862 #include "elf32-target.h"
6864 /* Intel MCU support. */
6867 elf32_iamcu_elf_object_p (bfd *abfd)
6869 /* Set the right machine number for an IAMCU elf32 file. */
6870 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
6874 #undef TARGET_LITTLE_SYM
6875 #define TARGET_LITTLE_SYM iamcu_elf32_vec
6876 #undef TARGET_LITTLE_NAME
6877 #define TARGET_LITTLE_NAME "elf32-iamcu"
6879 #define ELF_ARCH bfd_arch_iamcu
6881 #undef ELF_MACHINE_CODE
6882 #define ELF_MACHINE_CODE EM_IAMCU
6887 #define elf32_bed elf32_iamcu_bed
6889 #undef elf_backend_object_p
6890 #define elf_backend_object_p elf32_iamcu_elf_object_p
6892 #undef elf_backend_static_tls_alignment
6894 #undef elf_backend_want_plt_sym
6895 #define elf_backend_want_plt_sym 0
6897 #undef elf_backend_strtab_flags
6898 #undef elf_backend_copy_special_section_fields
6900 #include "elf32-target.h"
6902 /* Restore defaults. */
6904 #define ELF_ARCH bfd_arch_i386
6905 #undef ELF_MACHINE_CODE
6906 #define ELF_MACHINE_CODE EM_386
6908 /* Native Client support. */
6910 #undef TARGET_LITTLE_SYM
6911 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
6912 #undef TARGET_LITTLE_NAME
6913 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
6915 #define elf32_bed elf32_i386_nacl_bed
6917 #undef ELF_MAXPAGESIZE
6918 #define ELF_MAXPAGESIZE 0x10000
6920 /* Restore defaults. */
6922 #undef elf_backend_want_plt_sym
6923 #define elf_backend_want_plt_sym 0
6924 #undef elf_backend_post_process_headers
6925 #undef elf_backend_static_tls_alignment
6927 /* NaCl uses substantially different PLT entries for the same effects. */
6929 #undef elf_backend_plt_alignment
6930 #define elf_backend_plt_alignment 5
6931 #define NACL_PLT_ENTRY_SIZE 64
6932 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6934 static const bfd_byte elf_i386_nacl_plt0_entry[] =
6936 0xff, 0x35, /* pushl contents of address */
6937 0, 0, 0, 0, /* replaced with address of .got + 4. */
6938 0x8b, 0x0d, /* movl contents of address, %ecx */
6939 0, 0, 0, 0, /* replaced with address of .got + 8. */
6940 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6941 0xff, 0xe1 /* jmp *%ecx */
6944 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6946 0x8b, 0x0d, /* movl contents of address, %ecx */
6947 0, 0, 0, 0, /* replaced with GOT slot address. */
6948 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6949 0xff, 0xe1, /* jmp *%ecx */
6951 /* Pad to the next 32-byte boundary with nop instructions. */
6953 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6954 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6956 /* Lazy GOT entries point here (32-byte aligned). */
6957 0x68, /* pushl immediate */
6958 0, 0, 0, 0, /* replaced with reloc offset. */
6959 0xe9, /* jmp relative */
6960 0, 0, 0, 0, /* replaced with offset to .plt. */
6962 /* Pad to the next 32-byte boundary with nop instructions. */
6963 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6964 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6968 static const bfd_byte
6969 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
6971 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6972 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6973 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6974 0xff, 0xe1, /* jmp *%ecx */
6976 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6977 so pad to that size with nop instructions. */
6978 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
6981 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
6983 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6984 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6985 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6986 0xff, 0xe1, /* jmp *%ecx */
6988 /* Pad to the next 32-byte boundary with nop instructions. */
6990 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6991 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6993 /* Lazy GOT entries point here (32-byte aligned). */
6994 0x68, /* pushl immediate */
6995 0, 0, 0, 0, /* replaced with offset into relocation table. */
6996 0xe9, /* jmp relative */
6997 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6999 /* Pad to the next 32-byte boundary with nop instructions. */
7000 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7001 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7005 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
7007 #if (PLT_CIE_LENGTH != 20 \
7008 || PLT_FDE_LENGTH != 36 \
7009 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
7010 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
7011 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
7013 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
7014 0, 0, 0, 0, /* CIE ID */
7015 1, /* CIE version */
7016 'z', 'R', 0, /* Augmentation string */
7017 1, /* Code alignment factor */
7018 0x7c, /* Data alignment factor: -4 */
7019 8, /* Return address column */
7020 1, /* Augmentation size */
7021 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
7022 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
7023 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
7024 DW_CFA_nop, DW_CFA_nop,
7026 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
7027 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
7028 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
7029 0, 0, 0, 0, /* .plt size goes here */
7030 0, /* Augmentation size */
7031 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
7032 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
7033 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
7034 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
7035 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
7036 13, /* Block length */
7037 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
7038 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
7039 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
7040 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
7041 DW_CFA_nop, DW_CFA_nop
7044 static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt =
7046 elf_i386_nacl_plt0_entry, /* plt0_entry */
7047 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
7048 2, /* plt0_got1_offset */
7049 8, /* plt0_got2_offset */
7050 elf_i386_nacl_plt_entry, /* plt_entry */
7051 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
7052 2, /* plt_got_offset */
7053 33, /* plt_reloc_offset */
7054 38, /* plt_plt_offset */
7055 32, /* plt_lazy_offset */
7056 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
7057 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
7058 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
7059 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
7062 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
7064 0x90, /* plt0_pad_byte: nop insn */
7069 elf32_i386_nacl_elf_object_p (bfd *abfd)
7071 /* Set the right machine number for a NaCl i386 ELF32 file. */
7072 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
7076 #undef elf_backend_arch_data
7077 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
7079 #undef elf_backend_object_p
7080 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
7081 #undef elf_backend_modify_segment_map
7082 #define elf_backend_modify_segment_map nacl_modify_segment_map
7083 #undef elf_backend_modify_program_headers
7084 #define elf_backend_modify_program_headers nacl_modify_program_headers
7085 #undef elf_backend_final_write_processing
7086 #define elf_backend_final_write_processing nacl_final_write_processing
7088 #include "elf32-target.h"
7090 /* Restore defaults. */
7091 #undef elf_backend_object_p
7092 #undef elf_backend_modify_segment_map
7093 #undef elf_backend_modify_program_headers
7094 #undef elf_backend_final_write_processing
7096 /* VxWorks support. */
7098 #undef TARGET_LITTLE_SYM
7099 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
7100 #undef TARGET_LITTLE_NAME
7101 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
7103 #undef ELF_MAXPAGESIZE
7104 #define ELF_MAXPAGESIZE 0x1000
7105 #undef elf_backend_plt_alignment
7106 #define elf_backend_plt_alignment 4
7108 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
7110 0x90, /* plt0_pad_byte */
7114 #undef elf_backend_arch_data
7115 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
7117 #undef elf_backend_relocs_compatible
7118 #undef elf_backend_add_symbol_hook
7119 #define elf_backend_add_symbol_hook \
7120 elf_vxworks_add_symbol_hook
7121 #undef elf_backend_link_output_symbol_hook
7122 #define elf_backend_link_output_symbol_hook \
7123 elf_vxworks_link_output_symbol_hook
7124 #undef elf_backend_emit_relocs
7125 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
7126 #undef elf_backend_final_write_processing
7127 #define elf_backend_final_write_processing \
7128 elf_vxworks_final_write_processing
7129 #undef elf_backend_static_tls_alignment
7131 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7133 #undef elf_backend_want_plt_sym
7134 #define elf_backend_want_plt_sym 1
7137 #define elf32_bed elf32_i386_vxworks_bed
7139 #include "elf32-target.h"