1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2017 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
21 #include "elfxx-x86.h"
23 #include "elf-vxworks.h"
25 #include "opcode/i386.h"
27 /* 386 uses REL relocations instead of RELA. */
32 static reloc_howto_type elf_howto_table[]=
34 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
35 bfd_elf_generic_reloc, "R_386_NONE",
36 TRUE, 0x00000000, 0x00000000, FALSE),
37 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
38 bfd_elf_generic_reloc, "R_386_32",
39 TRUE, 0xffffffff, 0xffffffff, FALSE),
40 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
41 bfd_elf_generic_reloc, "R_386_PC32",
42 TRUE, 0xffffffff, 0xffffffff, TRUE),
43 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
44 bfd_elf_generic_reloc, "R_386_GOT32",
45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
47 bfd_elf_generic_reloc, "R_386_PLT32",
48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
50 bfd_elf_generic_reloc, "R_386_COPY",
51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
53 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
54 TRUE, 0xffffffff, 0xffffffff, FALSE),
55 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_386_RELATIVE",
60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_386_GOTOFF",
63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_386_GOTPC",
66 TRUE, 0xffffffff, 0xffffffff, TRUE),
68 /* We have a gap in the reloc numbers here.
69 R_386_standard counts the number up to this point, and
70 R_386_ext_offset is the value to subtract from a reloc type of
71 R_386_16 thru R_386_PC8 to form an index into this table. */
72 #define R_386_standard (R_386_GOTPC + 1)
73 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
75 /* These relocs are a GNU extension. */
76 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
78 TRUE, 0xffffffff, 0xffffffff, FALSE),
79 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_386_TLS_IE",
81 TRUE, 0xffffffff, 0xffffffff, FALSE),
82 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_386_TLS_LE",
87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_386_TLS_GD",
90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_386_TLS_LDM",
93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_386_16",
96 TRUE, 0xffff, 0xffff, FALSE),
97 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_386_PC16",
99 TRUE, 0xffff, 0xffff, TRUE),
100 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_386_8",
102 TRUE, 0xff, 0xff, FALSE),
103 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
104 bfd_elf_generic_reloc, "R_386_PC8",
105 TRUE, 0xff, 0xff, TRUE),
107 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
108 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
109 /* These are common with Solaris TLS implementation. */
110 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
112 TRUE, 0xffffffff, 0xffffffff, FALSE),
113 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
115 TRUE, 0xffffffff, 0xffffffff, FALSE),
116 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
127 TRUE, 0xffffffff, 0xffffffff, FALSE),
128 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
129 bfd_elf_generic_reloc, "R_386_SIZE32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
131 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
133 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
135 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
137 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_DESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
140 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_386_IRELATIVE",
142 TRUE, 0xffffffff, 0xffffffff, FALSE),
143 HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_GOT32X",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
148 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
149 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
151 /* GNU extension to record C++ vtable hierarchy. */
152 HOWTO (R_386_GNU_VTINHERIT, /* type */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
156 FALSE, /* pc_relative */
158 complain_overflow_dont, /* complain_on_overflow */
159 NULL, /* special_function */
160 "R_386_GNU_VTINHERIT", /* name */
161 FALSE, /* partial_inplace */
164 FALSE), /* pcrel_offset */
166 /* GNU extension to record C++ vtable member usage. */
167 HOWTO (R_386_GNU_VTENTRY, /* type */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
171 FALSE, /* pc_relative */
173 complain_overflow_dont, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
175 "R_386_GNU_VTENTRY", /* name */
176 FALSE, /* partial_inplace */
179 FALSE) /* pcrel_offset */
181 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
185 #ifdef DEBUG_GEN_RELOC
187 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
192 static reloc_howto_type *
193 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
194 bfd_reloc_code_real_type code)
199 TRACE ("BFD_RELOC_NONE");
200 return &elf_howto_table[R_386_NONE];
203 TRACE ("BFD_RELOC_32");
204 return &elf_howto_table[R_386_32];
207 TRACE ("BFD_RELOC_CTOR");
208 return &elf_howto_table[R_386_32];
210 case BFD_RELOC_32_PCREL:
211 TRACE ("BFD_RELOC_PC32");
212 return &elf_howto_table[R_386_PC32];
214 case BFD_RELOC_386_GOT32:
215 TRACE ("BFD_RELOC_386_GOT32");
216 return &elf_howto_table[R_386_GOT32];
218 case BFD_RELOC_386_PLT32:
219 TRACE ("BFD_RELOC_386_PLT32");
220 return &elf_howto_table[R_386_PLT32];
222 case BFD_RELOC_386_COPY:
223 TRACE ("BFD_RELOC_386_COPY");
224 return &elf_howto_table[R_386_COPY];
226 case BFD_RELOC_386_GLOB_DAT:
227 TRACE ("BFD_RELOC_386_GLOB_DAT");
228 return &elf_howto_table[R_386_GLOB_DAT];
230 case BFD_RELOC_386_JUMP_SLOT:
231 TRACE ("BFD_RELOC_386_JUMP_SLOT");
232 return &elf_howto_table[R_386_JUMP_SLOT];
234 case BFD_RELOC_386_RELATIVE:
235 TRACE ("BFD_RELOC_386_RELATIVE");
236 return &elf_howto_table[R_386_RELATIVE];
238 case BFD_RELOC_386_GOTOFF:
239 TRACE ("BFD_RELOC_386_GOTOFF");
240 return &elf_howto_table[R_386_GOTOFF];
242 case BFD_RELOC_386_GOTPC:
243 TRACE ("BFD_RELOC_386_GOTPC");
244 return &elf_howto_table[R_386_GOTPC];
246 /* These relocs are a GNU extension. */
247 case BFD_RELOC_386_TLS_TPOFF:
248 TRACE ("BFD_RELOC_386_TLS_TPOFF");
249 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
251 case BFD_RELOC_386_TLS_IE:
252 TRACE ("BFD_RELOC_386_TLS_IE");
253 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
255 case BFD_RELOC_386_TLS_GOTIE:
256 TRACE ("BFD_RELOC_386_TLS_GOTIE");
257 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
259 case BFD_RELOC_386_TLS_LE:
260 TRACE ("BFD_RELOC_386_TLS_LE");
261 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
263 case BFD_RELOC_386_TLS_GD:
264 TRACE ("BFD_RELOC_386_TLS_GD");
265 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
267 case BFD_RELOC_386_TLS_LDM:
268 TRACE ("BFD_RELOC_386_TLS_LDM");
269 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
272 TRACE ("BFD_RELOC_16");
273 return &elf_howto_table[R_386_16 - R_386_ext_offset];
275 case BFD_RELOC_16_PCREL:
276 TRACE ("BFD_RELOC_16_PCREL");
277 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
280 TRACE ("BFD_RELOC_8");
281 return &elf_howto_table[R_386_8 - R_386_ext_offset];
283 case BFD_RELOC_8_PCREL:
284 TRACE ("BFD_RELOC_8_PCREL");
285 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
287 /* Common with Sun TLS implementation. */
288 case BFD_RELOC_386_TLS_LDO_32:
289 TRACE ("BFD_RELOC_386_TLS_LDO_32");
290 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
292 case BFD_RELOC_386_TLS_IE_32:
293 TRACE ("BFD_RELOC_386_TLS_IE_32");
294 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
296 case BFD_RELOC_386_TLS_LE_32:
297 TRACE ("BFD_RELOC_386_TLS_LE_32");
298 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
300 case BFD_RELOC_386_TLS_DTPMOD32:
301 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
302 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
304 case BFD_RELOC_386_TLS_DTPOFF32:
305 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
306 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
308 case BFD_RELOC_386_TLS_TPOFF32:
309 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
310 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
312 case BFD_RELOC_SIZE32:
313 TRACE ("BFD_RELOC_SIZE32");
314 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
316 case BFD_RELOC_386_TLS_GOTDESC:
317 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
318 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
320 case BFD_RELOC_386_TLS_DESC_CALL:
321 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
322 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
324 case BFD_RELOC_386_TLS_DESC:
325 TRACE ("BFD_RELOC_386_TLS_DESC");
326 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
328 case BFD_RELOC_386_IRELATIVE:
329 TRACE ("BFD_RELOC_386_IRELATIVE");
330 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
332 case BFD_RELOC_386_GOT32X:
333 TRACE ("BFD_RELOC_386_GOT32X");
334 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
336 case BFD_RELOC_VTABLE_INHERIT:
337 TRACE ("BFD_RELOC_VTABLE_INHERIT");
338 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
340 case BFD_RELOC_VTABLE_ENTRY:
341 TRACE ("BFD_RELOC_VTABLE_ENTRY");
342 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
352 static reloc_howto_type *
353 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
358 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
359 if (elf_howto_table[i].name != NULL
360 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
361 return &elf_howto_table[i];
366 static reloc_howto_type *
367 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
371 if ((indx = r_type) >= R_386_standard
372 && ((indx = r_type - R_386_ext_offset) - R_386_standard
373 >= R_386_ext - R_386_standard)
374 && ((indx = r_type - R_386_tls_offset) - R_386_ext
375 >= R_386_ext2 - R_386_ext)
376 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
377 >= R_386_vt - R_386_ext2))
379 /* xgettext:c-format */
380 _bfd_error_handler (_("%B: invalid relocation type %d"),
384 /* PR 17512: file: 0f67f69d. */
385 if (elf_howto_table [indx].type != r_type)
387 return &elf_howto_table[indx];
391 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
393 Elf_Internal_Rela *dst)
395 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
396 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
399 /* Return whether a symbol name implies a local label. The UnixWare
400 2.1 cc generates temporary symbols that start with .X, so we
401 recognize them here. FIXME: do other SVR4 compilers also use .X?.
402 If so, we should move the .X recognition into
403 _bfd_elf_is_local_label_name. */
406 elf_i386_is_local_label_name (bfd *abfd, const char *name)
408 if (name[0] == '.' && name[1] == 'X')
411 return _bfd_elf_is_local_label_name (abfd, name);
414 /* Support for core dump NOTE sections. */
417 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
422 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
424 int pr_version = bfd_get_32 (abfd, note->descdata);
430 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
433 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
437 size = bfd_get_32 (abfd, note->descdata + 8);
441 switch (note->descsz)
446 case 144: /* Linux/i386 */
448 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
451 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
461 /* Make a ".reg/999" section. */
462 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
463 size, note->descpos + offset);
467 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
469 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
471 int pr_version = bfd_get_32 (abfd, note->descdata);
476 elf_tdata (abfd)->core->program
477 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
478 elf_tdata (abfd)->core->command
479 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
483 switch (note->descsz)
488 case 124: /* Linux/i386 elf_prpsinfo. */
489 elf_tdata (abfd)->core->pid
490 = bfd_get_32 (abfd, note->descdata + 12);
491 elf_tdata (abfd)->core->program
492 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
493 elf_tdata (abfd)->core->command
494 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
498 /* Note that for some reason, a spurious space is tacked
499 onto the end of the args in some (at least one anyway)
500 implementations, so strip it off if it exists. */
502 char *command = elf_tdata (abfd)->core->command;
503 int n = strlen (command);
505 if (0 < n && command[n - 1] == ' ')
506 command[n - 1] = '\0';
512 /* Functions for the i386 ELF linker.
514 In order to gain some understanding of code in this file without
515 knowing all the intricate details of the linker, note the
518 Functions named elf_i386_* are called by external routines, other
519 functions are only called locally. elf_i386_* functions appear
520 in this file more or less in the order in which they are called
521 from external routines. eg. elf_i386_check_relocs is called
522 early in the link process, elf_i386_finish_dynamic_sections is
523 one of the last functions. */
525 /* The size in bytes of an entry in the lazy procedure linkage table. */
527 #define LAZY_PLT_ENTRY_SIZE 16
529 /* The size in bytes of an entry in the non-lazy procedure linkage
532 #define NON_LAZY_PLT_ENTRY_SIZE 8
534 /* The first entry in an absolute lazy procedure linkage table looks
535 like this. See the SVR4 ABI i386 supplement to see how this works.
536 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
538 static const bfd_byte elf_i386_lazy_plt0_entry[12] =
540 0xff, 0x35, /* pushl contents of address */
541 0, 0, 0, 0, /* replaced with address of .got + 4. */
542 0xff, 0x25, /* jmp indirect */
543 0, 0, 0, 0 /* replaced with address of .got + 8. */
546 /* Subsequent entries in an absolute lazy procedure linkage table look
549 static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
551 0xff, 0x25, /* jmp indirect */
552 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
553 0x68, /* pushl immediate */
554 0, 0, 0, 0, /* replaced with offset into relocation table. */
555 0xe9, /* jmp relative */
556 0, 0, 0, 0 /* replaced with offset to start of .plt. */
559 /* The first entry in a PIC lazy procedure linkage table look like
560 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
561 lazy_plt->plt0_pad_byte. */
563 static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
565 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
566 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
569 /* Subsequent entries in a PIC lazy procedure linkage table look like
572 static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
574 0xff, 0xa3, /* jmp *offset(%ebx) */
575 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
576 0x68, /* pushl immediate */
577 0, 0, 0, 0, /* replaced with offset into relocation table. */
578 0xe9, /* jmp relative */
579 0, 0, 0, 0 /* replaced with offset to start of .plt. */
582 /* Entries in the non-lazy procedure linkage table look like this. */
584 static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
586 0xff, 0x25, /* jmp indirect */
587 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
588 0x66, 0x90 /* xchg %ax,%ax */
591 /* Entries in the PIC non-lazy procedure linkage table look like
594 static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
596 0xff, 0xa3, /* jmp *offset(%ebx) */
597 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
598 0x66, 0x90 /* xchg %ax,%ax */
601 /* The first entry in an absolute IBT-enabled lazy procedure linkage
602 table looks like this. */
604 static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
606 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
607 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
608 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
611 /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
612 table look like this. Subsequent entries for a PIC IBT-enabled lazy
613 procedure linkage table are the same. */
615 static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
617 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
618 0x68, 0, 0, 0, 0, /* pushl immediate */
619 0xe9, 0, 0, 0, 0, /* jmp relative */
620 0x66, 0x90 /* xchg %ax,%ax */
623 /* The first entry in a PIC IBT-enabled lazy procedure linkage table
626 static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
628 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
629 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
630 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
633 /* Entries for branches with IBT-enabled in the absolute non-lazey
634 procedure linkage table look like this. They have the same size
635 as the lazy PLT entry. */
637 static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
639 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
640 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
641 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
644 /* Entries for branches with IBT-enabled in the PIC non-lazey procedure
645 linkage table look like this. They have the same size as the lazy
648 static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
650 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
651 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
652 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
655 /* .eh_frame covering the lazy .plt section. */
657 static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
659 #define PLT_CIE_LENGTH 20
660 #define PLT_FDE_LENGTH 36
661 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
662 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
663 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
664 0, 0, 0, 0, /* CIE ID */
666 'z', 'R', 0, /* Augmentation string */
667 1, /* Code alignment factor */
668 0x7c, /* Data alignment factor */
669 8, /* Return address column */
670 1, /* Augmentation size */
671 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
672 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
673 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
674 DW_CFA_nop, DW_CFA_nop,
676 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
677 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
678 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
679 0, 0, 0, 0, /* .plt size goes here */
680 0, /* Augmentation size */
681 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
682 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
683 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
684 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
685 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
686 11, /* Block length */
687 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
688 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
689 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
690 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
691 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
694 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
696 static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
698 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
699 0, 0, 0, 0, /* CIE ID */
701 'z', 'R', 0, /* Augmentation string */
702 1, /* Code alignment factor */
703 0x7c, /* Data alignment factor */
704 8, /* Return address column */
705 1, /* Augmentation size */
706 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
707 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
708 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
709 DW_CFA_nop, DW_CFA_nop,
711 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
712 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
713 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
714 0, 0, 0, 0, /* .plt size goes here */
715 0, /* Augmentation size */
716 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
717 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
718 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
719 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
720 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
721 11, /* Block length */
722 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
723 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
724 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
725 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
726 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
729 /* .eh_frame covering the non-lazy .plt section. */
731 static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
733 #define PLT_GOT_FDE_LENGTH 16
734 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
735 0, 0, 0, 0, /* CIE ID */
737 'z', 'R', 0, /* Augmentation string */
738 1, /* Code alignment factor */
739 0x7c, /* Data alignment factor */
740 8, /* Return address column */
741 1, /* Augmentation size */
742 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
743 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
744 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
745 DW_CFA_nop, DW_CFA_nop,
747 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
748 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
749 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
750 0, 0, 0, 0, /* non-lazy .plt size goes here */
751 0, /* Augmentation size */
752 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
755 /* These are the standard parameters. */
756 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
758 elf_i386_lazy_plt0_entry, /* plt0_entry */
759 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
760 elf_i386_lazy_plt_entry, /* plt_entry */
761 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
762 2, /* plt0_got1_offset */
763 8, /* plt0_got2_offset */
764 0, /* plt0_got2_insn_end */
765 2, /* plt_got_offset */
766 7, /* plt_reloc_offset */
767 12, /* plt_plt_offset */
768 0, /* plt_got_insn_size */
769 0, /* plt_plt_insn_end */
770 6, /* plt_lazy_offset */
771 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
772 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
773 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
774 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
777 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
779 elf_i386_non_lazy_plt_entry, /* plt_entry */
780 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
781 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
782 2, /* plt_got_offset */
783 0, /* plt_got_insn_size */
784 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
785 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
788 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
790 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
791 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
792 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
793 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
794 2, /* plt0_got1_offset */
795 8, /* plt0_got2_offset */
796 0, /* plt0_got2_insn_end */
797 4+2, /* plt_got_offset */
798 4+1, /* plt_reloc_offset */
799 4+6, /* plt_plt_offset */
800 0, /* plt_got_insn_size */
801 0, /* plt_plt_insn_end */
802 0, /* plt_lazy_offset */
803 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
804 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
805 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
806 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
809 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
811 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
812 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
813 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
814 4+2, /* plt_got_offset */
815 0, /* plt_got_insn_size */
816 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
817 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
821 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
822 for the PLTResolve stub and then for each PLT entry. */
823 #define PLTRESOLVE_RELOCS_SHLIB 0
824 #define PLTRESOLVE_RELOCS 2
825 #define PLT_NON_JUMP_SLOT_RELOCS 2
827 /* Architecture-specific backend data for i386. */
829 struct elf_i386_backend_data
831 /* Value used to fill the unused bytes of the first PLT entry. */
832 bfd_byte plt0_pad_byte;
843 #define get_elf_i386_backend_data(abfd) \
844 ((const struct elf_i386_backend_data *) \
845 get_elf_backend_data (abfd)->arch_data)
847 /* These are the standard parameters. */
848 static const struct elf_i386_backend_data elf_i386_arch_bed =
850 0, /* plt0_pad_byte */
854 #define elf_backend_arch_data &elf_i386_arch_bed
856 #define is_i386_elf(bfd) \
857 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
858 && elf_tdata (bfd) != NULL \
859 && elf_object_id (bfd) == I386_ELF_DATA)
861 #define elf_i386_compute_jump_table_size(htab) \
862 ((htab)->elf.srelplt->reloc_count * 4)
864 /* Return TRUE if the TLS access code sequence support transition
868 elf_i386_check_tls_transition (asection *sec,
870 Elf_Internal_Shdr *symtab_hdr,
871 struct elf_link_hash_entry **sym_hashes,
873 const Elf_Internal_Rela *rel,
874 const Elf_Internal_Rela *relend)
876 unsigned int val, type, reg;
877 unsigned long r_symndx;
878 struct elf_link_hash_entry *h;
881 bfd_boolean indirect_call;
883 offset = rel->r_offset;
888 if (offset < 2 || (rel + 1) >= relend)
891 indirect_call = FALSE;
892 call = contents + offset + 4;
895 if (r_type == R_386_TLS_GD)
897 /* Check transition from GD access model. Only
898 leal foo@tlsgd(,%ebx,1), %eax
899 call ___tls_get_addr@PLT
901 leal foo@tlsgd(%ebx) %eax
902 call ___tls_get_addr@PLT
905 leal foo@tlsgd(%reg), %eax
906 call *___tls_get_addr@GOT(%reg)
907 which may be converted to
908 addr32 call ___tls_get_addr
909 can transit to different access model. */
910 if ((offset + 10) > sec->size
911 || (type != 0x8d && type != 0x04))
916 /* leal foo@tlsgd(,%ebx,1), %eax
917 call ___tls_get_addr@PLT */
921 if (*(call - 7) != 0x8d
929 leal foo@tlsgd(%ebx), %eax
930 call ___tls_get_addr@PLT
933 leal foo@tlsgd(%reg), %eax
934 call *___tls_get_addr@GOT(%reg)
935 which may be converted to
936 addr32 call ___tls_get_addr
938 %eax can't be used as the GOT base register since it
939 is used to pass parameter to ___tls_get_addr. */
941 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
944 indirect_call = call[0] == 0xff;
945 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
946 && !(call[0] == 0x67 && call[1] == 0xe8)
948 && (call[1] & 0xf8) == 0x90
949 && (call[1] & 0x7) == reg))
955 /* Check transition from LD access model. Only
956 leal foo@tlsldm(%ebx), %eax
957 call ___tls_get_addr@PLT
959 leal foo@tlsldm(%reg), %eax
960 call *___tls_get_addr@GOT(%reg)
961 which may be converted to
962 addr32 call ___tls_get_addr
963 can transit to different access model. */
964 if (type != 0x8d || (offset + 9) > sec->size)
967 /* %eax can't be used as the GOT base register since it is
968 used to pass parameter to ___tls_get_addr. */
970 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
973 indirect_call = call[0] == 0xff;
974 if (!(reg == 3 && call[0] == 0xe8)
975 && !(call[0] == 0x67 && call[1] == 0xe8)
977 && (call[1] & 0xf8) == 0x90
978 && (call[1] & 0x7) == reg))
982 r_symndx = ELF32_R_SYM (rel[1].r_info);
983 if (r_symndx < symtab_hdr->sh_info)
986 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
988 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
990 else if (indirect_call)
991 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
993 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
994 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
997 /* Check transition from IE access model:
998 movl foo@indntpoff(%rip), %eax
999 movl foo@indntpoff(%rip), %reg
1000 addl foo@indntpoff(%rip), %reg
1003 if (offset < 1 || (offset + 4) > sec->size)
1006 /* Check "movl foo@tpoff(%rip), %eax" first. */
1007 val = bfd_get_8 (abfd, contents + offset - 1);
1014 /* Check movl|addl foo@tpoff(%rip), %reg. */
1015 type = bfd_get_8 (abfd, contents + offset - 2);
1016 return ((type == 0x8b || type == 0x03)
1017 && (val & 0xc7) == 0x05);
1019 case R_386_TLS_GOTIE:
1020 case R_386_TLS_IE_32:
1021 /* Check transition from {IE_32,GOTIE} access model:
1022 subl foo@{tpoff,gontoff}(%reg1), %reg2
1023 movl foo@{tpoff,gontoff}(%reg1), %reg2
1024 addl foo@{tpoff,gontoff}(%reg1), %reg2
1027 if (offset < 2 || (offset + 4) > sec->size)
1030 val = bfd_get_8 (abfd, contents + offset - 1);
1031 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1034 type = bfd_get_8 (abfd, contents + offset - 2);
1035 return type == 0x8b || type == 0x2b || type == 0x03;
1037 case R_386_TLS_GOTDESC:
1038 /* Check transition from GDesc access model:
1039 leal x@tlsdesc(%ebx), %eax
1041 Make sure it's a leal adding ebx to a 32-bit offset
1042 into any register, although it's probably almost always
1045 if (offset < 2 || (offset + 4) > sec->size)
1048 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1051 val = bfd_get_8 (abfd, contents + offset - 1);
1052 return (val & 0xc7) == 0x83;
1054 case R_386_TLS_DESC_CALL:
1055 /* Check transition from GDesc access model:
1056 call *x@tlsdesc(%eax)
1058 if (offset + 2 <= sec->size)
1060 /* Make sure that it's a call *x@tlsdesc(%eax). */
1061 call = contents + offset;
1062 return call[0] == 0xff && call[1] == 0x10;
1072 /* Return TRUE if the TLS access transition is OK or no transition
1073 will be performed. Update R_TYPE if there is a transition. */
1076 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1077 asection *sec, bfd_byte *contents,
1078 Elf_Internal_Shdr *symtab_hdr,
1079 struct elf_link_hash_entry **sym_hashes,
1080 unsigned int *r_type, int tls_type,
1081 const Elf_Internal_Rela *rel,
1082 const Elf_Internal_Rela *relend,
1083 struct elf_link_hash_entry *h,
1084 unsigned long r_symndx,
1085 bfd_boolean from_relocate_section)
1087 unsigned int from_type = *r_type;
1088 unsigned int to_type = from_type;
1089 bfd_boolean check = TRUE;
1091 /* Skip TLS transition for functions. */
1093 && (h->type == STT_FUNC
1094 || h->type == STT_GNU_IFUNC))
1100 case R_386_TLS_GOTDESC:
1101 case R_386_TLS_DESC_CALL:
1102 case R_386_TLS_IE_32:
1104 case R_386_TLS_GOTIE:
1105 if (bfd_link_executable (info))
1108 to_type = R_386_TLS_LE_32;
1109 else if (from_type != R_386_TLS_IE
1110 && from_type != R_386_TLS_GOTIE)
1111 to_type = R_386_TLS_IE_32;
1114 /* When we are called from elf_i386_relocate_section, there may
1115 be additional transitions based on TLS_TYPE. */
1116 if (from_relocate_section)
1118 unsigned int new_to_type = to_type;
1120 if (bfd_link_executable (info)
1123 && (tls_type & GOT_TLS_IE))
1124 new_to_type = R_386_TLS_LE_32;
1126 if (to_type == R_386_TLS_GD
1127 || to_type == R_386_TLS_GOTDESC
1128 || to_type == R_386_TLS_DESC_CALL)
1130 if (tls_type == GOT_TLS_IE_POS)
1131 new_to_type = R_386_TLS_GOTIE;
1132 else if (tls_type & GOT_TLS_IE)
1133 new_to_type = R_386_TLS_IE_32;
1136 /* We checked the transition before when we were called from
1137 elf_i386_check_relocs. We only want to check the new
1138 transition which hasn't been checked before. */
1139 check = new_to_type != to_type && from_type == to_type;
1140 to_type = new_to_type;
1146 if (bfd_link_executable (info))
1147 to_type = R_386_TLS_LE_32;
1154 /* Return TRUE if there is no transition. */
1155 if (from_type == to_type)
1158 /* Check if the transition can be performed. */
1160 && ! elf_i386_check_tls_transition (sec, contents,
1161 symtab_hdr, sym_hashes,
1162 from_type, rel, relend))
1164 reloc_howto_type *from, *to;
1167 from = elf_i386_rtype_to_howto (abfd, from_type);
1168 to = elf_i386_rtype_to_howto (abfd, to_type);
1171 name = h->root.root.string;
1174 struct elf_x86_link_hash_table *htab;
1176 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1181 Elf_Internal_Sym *isym;
1183 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1185 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1190 /* xgettext:c-format */
1191 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1192 "in section `%A' failed"),
1193 abfd, from->name, to->name, name,
1194 rel->r_offset, sec);
1195 bfd_set_error (bfd_error_bad_value);
1203 /* With the local symbol, foo, we convert
1204 mov foo@GOT[(%reg1)], %reg2
1206 lea foo[@GOTOFF(%reg1)], %reg2
1208 call/jmp *foo@GOT[(%reg)]
1210 nop call foo/jmp foo nop
1211 When PIC is false, convert
1212 test %reg1, foo@GOT[(%reg2)]
1216 binop foo@GOT[(%reg1)], %reg2
1219 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1224 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1226 Elf_Internal_Rela *irel,
1227 struct elf_link_hash_entry *h,
1228 bfd_boolean *converted,
1229 struct bfd_link_info *link_info)
1231 struct elf_x86_link_hash_table *htab;
1232 unsigned int opcode;
1234 bfd_boolean baseless;
1235 Elf_Internal_Sym *isym;
1236 unsigned int addend;
1240 bfd_boolean to_reloc_32;
1241 unsigned int r_type;
1242 unsigned int r_symndx;
1243 bfd_vma roff = irel->r_offset;
1248 /* Addend for R_386_GOT32X relocations must be 0. */
1249 addend = bfd_get_32 (abfd, contents + roff);
1253 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
1254 is_pic = bfd_link_pic (link_info);
1256 r_type = ELF32_R_TYPE (irel->r_info);
1257 r_symndx = ELF32_R_SYM (irel->r_info);
1259 modrm = bfd_get_8 (abfd, contents + roff - 1);
1260 baseless = (modrm & 0xc7) == 0x5;
1262 if (baseless && is_pic)
1264 /* For PIC, disallow R_386_GOT32X without a base register
1265 since we don't know what the GOT base is. */
1270 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1272 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1275 name = h->root.root.string;
1278 /* xgettext:c-format */
1279 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1280 " register can not be used when making a shared object"),
1285 opcode = bfd_get_8 (abfd, contents + roff - 2);
1287 /* Convert to R_386_32 if PIC is false or there is no base
1289 to_reloc_32 = !is_pic || baseless;
1291 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1295 if (opcode == 0x0ff)
1296 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1297 goto convert_branch;
1299 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1300 "test %reg1, foo@GOT(%reg2)" and
1301 "binop foo@GOT[(%reg1)], %reg2". */
1305 /* Undefined weak symbol is only bound locally in executable
1306 and its reference is resolved as 0. */
1307 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, I386_ELF_DATA, TRUE,
1308 elf_x86_hash_entry (h)))
1312 /* No direct branch to 0 for PIC. */
1316 goto convert_branch;
1320 /* We can convert load of address 0 to R_386_32. */
1328 /* We have "call/jmp *foo@GOT[(%reg)]". */
1329 if ((h->root.type == bfd_link_hash_defined
1330 || h->root.type == bfd_link_hash_defweak)
1331 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1333 /* The function is locally defined. */
1335 /* Convert R_386_GOT32X to R_386_PC32. */
1336 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1338 struct elf_x86_link_hash_entry *eh
1339 = (struct elf_x86_link_hash_entry *) h;
1341 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1344 /* To support TLS optimization, always use addr32 prefix
1345 for "call *___tls_get_addr@GOT(%reg)". */
1346 if (eh && eh->tls_get_addr)
1349 nop_offset = irel->r_offset - 2;
1353 nop = link_info->call_nop_byte;
1354 if (link_info->call_nop_as_suffix)
1356 nop_offset = roff + 3;
1357 irel->r_offset -= 1;
1360 nop_offset = roff - 2;
1365 /* Convert to "jmp foo nop". */
1368 nop_offset = roff + 3;
1369 irel->r_offset -= 1;
1372 bfd_put_8 (abfd, nop, contents + nop_offset);
1373 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1374 /* When converting to PC-relative relocation, we
1375 need to adjust addend by -4. */
1376 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1377 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1384 /* We have "mov foo@GOT[(%re1g)], %reg2",
1385 "test %reg1, foo@GOT(%reg2)" and
1386 "binop foo@GOT[(%reg1)], %reg2".
1388 Avoid optimizing _DYNAMIC since ld.so may use its
1389 link-time address. */
1390 if (h == htab->elf.hdynamic)
1393 /* def_regular is set by an assignment in a linker script in
1394 bfd_elf_record_link_assignment. start_stop is set on
1395 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1398 || h->root.type == bfd_link_hash_defined
1399 || h->root.type == bfd_link_hash_defweak)
1400 && SYMBOL_REFERENCES_LOCAL (link_info, h)))
1407 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1408 "mov $foo, %reg2" with R_386_32. */
1410 modrm = 0xc0 | (modrm & 0x38) >> 3;
1411 bfd_put_8 (abfd, modrm, contents + roff - 1);
1416 /* Convert "mov foo@GOT(%reg1), %reg2" to
1417 "lea foo@GOTOFF(%reg1), %reg2". */
1418 r_type = R_386_GOTOFF;
1424 /* Only R_386_32 is supported. */
1430 /* Convert "test %reg1, foo@GOT(%reg2)" to
1431 "test $foo, %reg1". */
1432 modrm = 0xc0 | (modrm & 0x38) >> 3;
1437 /* Convert "binop foo@GOT(%reg1), %reg2" to
1438 "binop $foo, %reg2". */
1440 | (modrm & 0x38) >> 3
1444 bfd_put_8 (abfd, modrm, contents + roff - 1);
1448 bfd_put_8 (abfd, opcode, contents + roff - 2);
1449 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1458 /* Rename some of the generic section flags to better document how they
1460 #define need_convert_load sec_flg0
1461 #define check_relocs_failed sec_flg1
1463 /* Look through the relocs for a section during the first phase, and
1464 calculate needed space in the global offset table, procedure linkage
1465 table, and dynamic reloc sections. */
1468 elf_i386_check_relocs (bfd *abfd,
1469 struct bfd_link_info *info,
1471 const Elf_Internal_Rela *relocs)
1473 struct elf_x86_link_hash_table *htab;
1474 Elf_Internal_Shdr *symtab_hdr;
1475 struct elf_link_hash_entry **sym_hashes;
1476 const Elf_Internal_Rela *rel;
1477 const Elf_Internal_Rela *rel_end;
1481 if (bfd_link_relocatable (info))
1484 /* Don't do anything special with non-loaded, non-alloced sections.
1485 In particular, any relocs in such sections should not affect GOT
1486 and PLT reference counting (ie. we don't allow them to create GOT
1487 or PLT entries), there's no possibility or desire to optimize TLS
1488 relocs, and there's not much point in propagating relocs to shared
1489 libs that the dynamic linker won't relocate. */
1490 if ((sec->flags & SEC_ALLOC) == 0)
1493 BFD_ASSERT (is_i386_elf (abfd));
1495 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1498 sec->check_relocs_failed = 1;
1502 /* Get the section contents. */
1503 if (elf_section_data (sec)->this_hdr.contents != NULL)
1504 contents = elf_section_data (sec)->this_hdr.contents;
1505 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1507 sec->check_relocs_failed = 1;
1511 symtab_hdr = &elf_symtab_hdr (abfd);
1512 sym_hashes = elf_sym_hashes (abfd);
1516 rel_end = relocs + sec->reloc_count;
1517 for (rel = relocs; rel < rel_end; rel++)
1519 unsigned int r_type;
1520 unsigned int r_symndx;
1521 struct elf_link_hash_entry *h;
1522 struct elf_x86_link_hash_entry *eh;
1523 Elf_Internal_Sym *isym;
1525 bfd_boolean size_reloc;
1527 r_symndx = ELF32_R_SYM (rel->r_info);
1528 r_type = ELF32_R_TYPE (rel->r_info);
1530 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1532 /* xgettext:c-format */
1533 _bfd_error_handler (_("%B: bad symbol index: %d"),
1538 if (r_symndx < symtab_hdr->sh_info)
1540 /* A local symbol. */
1541 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1546 /* Check relocation against local STT_GNU_IFUNC symbol. */
1547 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1549 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
1553 /* Fake a STT_GNU_IFUNC symbol. */
1554 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1556 h->type = STT_GNU_IFUNC;
1559 h->forced_local = 1;
1560 h->root.type = bfd_link_hash_defined;
1568 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1569 while (h->root.type == bfd_link_hash_indirect
1570 || h->root.type == bfd_link_hash_warning)
1571 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1574 eh = (struct elf_x86_link_hash_entry *) h;
1577 if (r_type == R_386_GOTOFF)
1580 /* It is referenced by a non-shared object. */
1582 h->root.non_ir_ref_regular = 1;
1584 if (h->type == STT_GNU_IFUNC)
1585 elf_tdata (info->output_bfd)->has_gnu_symbols
1586 |= elf_gnu_symbol_ifunc;
1589 if (! elf_i386_tls_transition (info, abfd, sec, contents,
1590 symtab_hdr, sym_hashes,
1591 &r_type, GOT_UNKNOWN,
1592 rel, rel_end, h, r_symndx, FALSE))
1598 htab->tls_ld_or_ldm_got.refcount += 1;
1602 /* This symbol requires a procedure linkage table entry. We
1603 actually build the entry in adjust_dynamic_symbol,
1604 because this might be a case of linking PIC code which is
1605 never referenced by a dynamic object, in which case we
1606 don't need to generate a procedure linkage table entry
1609 /* If this is a local symbol, we resolve it directly without
1610 creating a procedure linkage table entry. */
1614 eh->has_got_reloc = 1;
1616 h->plt.refcount += 1;
1623 case R_386_TLS_IE_32:
1625 case R_386_TLS_GOTIE:
1626 if (!bfd_link_executable (info))
1627 info->flags |= DF_STATIC_TLS;
1633 case R_386_TLS_GOTDESC:
1634 case R_386_TLS_DESC_CALL:
1635 /* This symbol requires a global offset table entry. */
1637 int tls_type, old_tls_type;
1644 tls_type = GOT_NORMAL;
1646 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1647 case R_386_TLS_GOTDESC:
1648 case R_386_TLS_DESC_CALL:
1649 tls_type = GOT_TLS_GDESC; break;
1650 case R_386_TLS_IE_32:
1651 if (ELF32_R_TYPE (rel->r_info) == r_type)
1652 tls_type = GOT_TLS_IE_NEG;
1654 /* If this is a GD->IE transition, we may use either of
1655 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1656 tls_type = GOT_TLS_IE;
1659 case R_386_TLS_GOTIE:
1660 tls_type = GOT_TLS_IE_POS; break;
1665 h->got.refcount += 1;
1666 old_tls_type = elf_x86_hash_entry (h)->tls_type;
1670 bfd_signed_vma *local_got_refcounts;
1672 /* This is a global offset table entry for a local symbol. */
1673 local_got_refcounts = elf_local_got_refcounts (abfd);
1674 if (local_got_refcounts == NULL)
1678 size = symtab_hdr->sh_info;
1679 size *= (sizeof (bfd_signed_vma)
1680 + sizeof (bfd_vma) + sizeof(char));
1681 local_got_refcounts = (bfd_signed_vma *)
1682 bfd_zalloc (abfd, size);
1683 if (local_got_refcounts == NULL)
1685 elf_local_got_refcounts (abfd) = local_got_refcounts;
1686 elf_x86_local_tlsdesc_gotent (abfd)
1687 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1688 elf_x86_local_got_tls_type (abfd)
1689 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1691 local_got_refcounts[r_symndx] += 1;
1692 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
1695 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1696 tls_type |= old_tls_type;
1697 /* If a TLS symbol is accessed using IE at least once,
1698 there is no point to use dynamic model for it. */
1699 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1700 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1701 || (tls_type & GOT_TLS_IE) == 0))
1703 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1704 tls_type = old_tls_type;
1705 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1706 && GOT_TLS_GD_ANY_P (tls_type))
1707 tls_type |= old_tls_type;
1711 name = h->root.root.string;
1713 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1716 /* xgettext:c-format */
1717 (_("%B: `%s' accessed both as normal and "
1718 "thread local symbol"),
1720 bfd_set_error (bfd_error_bad_value);
1725 if (old_tls_type != tls_type)
1728 elf_x86_hash_entry (h)->tls_type = tls_type;
1730 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
1738 if (r_type != R_386_TLS_IE)
1741 eh->has_got_reloc = 1;
1746 case R_386_TLS_LE_32:
1749 eh->has_got_reloc = 1;
1750 if (bfd_link_executable (info))
1752 info->flags |= DF_STATIC_TLS;
1757 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1758 eh->has_non_got_reloc = 1;
1760 /* We are called after all symbols have been resolved. Only
1761 relocation against STT_GNU_IFUNC symbol must go through
1764 && (bfd_link_executable (info)
1765 || h->type == STT_GNU_IFUNC))
1767 /* If this reloc is in a read-only section, we might
1768 need a copy reloc. We can't check reliably at this
1769 stage whether the section is read-only, as input
1770 sections have not yet been mapped to output sections.
1771 Tentatively set the flag for now, and correct in
1772 adjust_dynamic_symbol. */
1775 /* We may need a .plt entry if the symbol is a function
1776 defined in a shared lib or is a STT_GNU_IFUNC function
1777 referenced from the code or read-only section. */
1779 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1780 h->plt.refcount += 1;
1782 if (r_type == R_386_PC32)
1784 /* Since something like ".long foo - ." may be used
1785 as pointer, make sure that PLT is used if foo is
1786 a function defined in a shared library. */
1787 if ((sec->flags & SEC_CODE) == 0)
1788 h->pointer_equality_needed = 1;
1789 else if (h->type == STT_GNU_IFUNC
1790 && bfd_link_pic (info))
1793 /* xgettext:c-format */
1794 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
1795 abfd, h->root.root.string);
1796 bfd_set_error (bfd_error_bad_value);
1802 h->pointer_equality_needed = 1;
1803 /* R_386_32 can be resolved at run-time. */
1804 if (r_type == R_386_32
1805 && (sec->flags & SEC_READONLY) == 0)
1806 eh->func_pointer_refcount += 1;
1812 /* If we are creating a shared library, and this is a reloc
1813 against a global symbol, or a non PC relative reloc
1814 against a local symbol, then we need to copy the reloc
1815 into the shared library. However, if we are linking with
1816 -Bsymbolic, we do not need to copy a reloc against a
1817 global symbol which is defined in an object we are
1818 including in the link (i.e., DEF_REGULAR is set). At
1819 this point we have not seen all the input files, so it is
1820 possible that DEF_REGULAR is not set now but will be set
1821 later (it is never cleared). In case of a weak definition,
1822 DEF_REGULAR may be cleared later by a strong definition in
1823 a shared library. We account for that possibility below by
1824 storing information in the relocs_copied field of the hash
1825 table entry. A similar situation occurs when creating
1826 shared libraries and symbol visibility changes render the
1829 If on the other hand, we are creating an executable, we
1830 may need to keep relocations for symbols satisfied by a
1831 dynamic library if we manage to avoid copy relocs for the
1834 Generate dynamic pointer relocation against STT_GNU_IFUNC
1835 symbol in the non-code section. */
1836 if ((bfd_link_pic (info)
1837 && (r_type != R_386_PC32
1839 && (! (bfd_link_pie (info)
1840 || SYMBOLIC_BIND (info, h))
1841 || h->root.type == bfd_link_hash_defweak
1842 || !h->def_regular))))
1844 && h->type == STT_GNU_IFUNC
1845 && r_type == R_386_32
1846 && (sec->flags & SEC_CODE) == 0)
1847 || (ELIMINATE_COPY_RELOCS
1848 && !bfd_link_pic (info)
1850 && (h->root.type == bfd_link_hash_defweak
1851 || !h->def_regular)))
1853 struct elf_dyn_relocs *p;
1854 struct elf_dyn_relocs **head;
1856 /* We must copy these reloc types into the output file.
1857 Create a reloc section in dynobj and make room for
1861 sreloc = _bfd_elf_make_dynamic_reloc_section
1862 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1868 /* If this is a global symbol, we count the number of
1869 relocations we need for this symbol. */
1872 head = &eh->dyn_relocs;
1876 /* Track dynamic relocs needed for local syms too.
1877 We really need local syms available to do this
1882 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1887 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1891 vpp = &elf_section_data (s)->local_dynrel;
1892 head = (struct elf_dyn_relocs **)vpp;
1896 if (p == NULL || p->sec != sec)
1898 bfd_size_type amt = sizeof *p;
1899 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1911 /* Count size relocation as PC-relative relocation. */
1912 if (r_type == R_386_PC32 || size_reloc)
1917 /* This relocation describes the C++ object vtable hierarchy.
1918 Reconstruct it for later use during GC. */
1919 case R_386_GNU_VTINHERIT:
1920 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1924 /* This relocation describes which C++ vtable entries are actually
1925 used. Record for later use during GC. */
1926 case R_386_GNU_VTENTRY:
1927 BFD_ASSERT (h != NULL);
1929 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1937 if (r_type == R_386_GOT32X
1938 && (h == NULL || h->type != STT_GNU_IFUNC))
1939 sec->need_convert_load = 1;
1942 if (elf_section_data (sec)->this_hdr.contents != contents)
1944 if (!info->keep_memory)
1948 /* Cache the section contents for elf_link_input_bfd. */
1949 elf_section_data (sec)->this_hdr.contents = contents;
1956 if (elf_section_data (sec)->this_hdr.contents != contents)
1958 sec->check_relocs_failed = 1;
1962 /* Allocate space in .plt, .got and associated reloc sections for
1966 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1968 struct bfd_link_info *info;
1969 struct elf_x86_link_hash_table *htab;
1970 struct elf_x86_link_hash_entry *eh;
1971 struct elf_dyn_relocs *p;
1972 unsigned plt_entry_size;
1973 bfd_boolean resolved_to_zero;
1974 const struct elf_i386_backend_data *bed;
1976 if (h->root.type == bfd_link_hash_indirect)
1979 eh = (struct elf_x86_link_hash_entry *) h;
1981 info = (struct bfd_link_info *) inf;
1982 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1986 bed = get_elf_i386_backend_data (info->output_bfd);
1988 plt_entry_size = htab->plt.plt_entry_size;
1990 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
1995 /* Clear the reference count of function pointer relocations if
1996 symbol isn't a normal function. */
1997 if (h->type != STT_FUNC)
1998 eh->func_pointer_refcount = 0;
2000 /* We can't use the GOT PLT if pointer equality is needed since
2001 finish_dynamic_symbol won't clear symbol value and the dynamic
2002 linker won't update the GOT slot. We will get into an infinite
2003 loop at run-time. */
2004 if (htab->plt_got != NULL
2005 && h->type != STT_GNU_IFUNC
2006 && !h->pointer_equality_needed
2007 && h->plt.refcount > 0
2008 && h->got.refcount > 0)
2010 /* Don't use the regular PLT if there are both GOT and GOTPLT
2012 h->plt.offset = (bfd_vma) -1;
2014 /* Use the GOT PLT. */
2015 eh->plt_got.refcount = 1;
2018 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2019 here if it is defined and referenced in a non-shared object. */
2020 if (h->type == STT_GNU_IFUNC
2023 if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2024 &htab->readonly_dynrelocs_against_ifunc,
2030 asection *s = htab->plt_second;
2031 if (h->plt.offset != (bfd_vma) -1 && s != NULL)
2033 /* Use the second PLT section if it is created. */
2034 eh->plt_second.offset = s->size;
2036 /* Make room for this entry in the second PLT section. */
2037 s->size += htab->non_lazy_plt->plt_entry_size;
2045 /* Don't create the PLT entry if there are only function pointer
2046 relocations which can be resolved at run-time. */
2047 else if (htab->elf.dynamic_sections_created
2048 && (h->plt.refcount > eh->func_pointer_refcount
2049 || eh->plt_got.refcount > 0))
2051 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
2053 /* Clear the reference count of function pointer relocations
2055 eh->func_pointer_refcount = 0;
2057 /* Make sure this symbol is output as a dynamic symbol.
2058 Undefined weak syms won't yet be marked as dynamic. */
2059 if (h->dynindx == -1
2061 && !resolved_to_zero
2062 && h->root.type == bfd_link_hash_undefweak)
2064 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2068 if (bfd_link_pic (info)
2069 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2071 asection *s = htab->elf.splt;
2072 asection *second_s = htab->plt_second;
2073 asection *got_s = htab->plt_got;
2075 /* If this is the first .plt entry, make room for the special
2076 first entry. The .plt section is used by prelink to undo
2077 prelinking for dynamic relocations. */
2079 s->size = htab->plt.has_plt0 * plt_entry_size;
2082 eh->plt_got.offset = got_s->size;
2085 h->plt.offset = s->size;
2087 eh->plt_second.offset = second_s->size;
2090 /* If this symbol is not defined in a regular file, and we are
2091 not generating a shared library, then set the symbol to this
2092 location in the .plt. This is required to make function
2093 pointers compare as equal between the normal executable and
2094 the shared library. */
2095 if (! bfd_link_pic (info)
2100 /* We need to make a call to the entry of the GOT PLT
2101 instead of regular PLT entry. */
2102 h->root.u.def.section = got_s;
2103 h->root.u.def.value = eh->plt_got.offset;
2109 /* We need to make a call to the entry of the
2110 second PLT instead of regular PLT entry. */
2111 h->root.u.def.section = second_s;
2112 h->root.u.def.value = eh->plt_second.offset;
2116 h->root.u.def.section = s;
2117 h->root.u.def.value = h->plt.offset;
2122 /* Make room for this entry. */
2124 got_s->size += htab->non_lazy_plt->plt_entry_size;
2127 s->size += plt_entry_size;
2129 second_s->size += htab->non_lazy_plt->plt_entry_size;
2131 /* We also need to make an entry in the .got.plt section,
2132 which will be placed in the .got section by the linker
2134 htab->elf.sgotplt->size += 4;
2136 /* There should be no PLT relocation against resolved
2137 undefined weak symbol in executable. */
2138 if (!resolved_to_zero)
2140 /* We also need to make an entry in the .rel.plt
2142 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2143 htab->elf.srelplt->reloc_count++;
2147 if (bed->os == is_vxworks && !bfd_link_pic (info))
2149 /* VxWorks has a second set of relocations for each PLT entry
2150 in executables. They go in a separate relocation section,
2151 which is processed by the kernel loader. */
2153 /* There are two relocations for the initial PLT entry: an
2154 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2155 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2157 asection *srelplt2 = htab->srelplt2;
2158 if (h->plt.offset == plt_entry_size)
2159 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2161 /* There are two extra relocations for each subsequent PLT entry:
2162 an R_386_32 relocation for the GOT entry, and an R_386_32
2163 relocation for the PLT entry. */
2165 srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2170 eh->plt_got.offset = (bfd_vma) -1;
2171 h->plt.offset = (bfd_vma) -1;
2177 eh->plt_got.offset = (bfd_vma) -1;
2178 h->plt.offset = (bfd_vma) -1;
2182 eh->tlsdesc_got = (bfd_vma) -1;
2184 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2185 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2186 if (h->got.refcount > 0
2187 && bfd_link_executable (info)
2189 && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE))
2190 h->got.offset = (bfd_vma) -1;
2191 else if (h->got.refcount > 0)
2195 int tls_type = elf_x86_hash_entry (h)->tls_type;
2197 /* Make sure this symbol is output as a dynamic symbol.
2198 Undefined weak syms won't yet be marked as dynamic. */
2199 if (h->dynindx == -1
2201 && !resolved_to_zero
2202 && h->root.type == bfd_link_hash_undefweak)
2204 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2209 if (GOT_TLS_GDESC_P (tls_type))
2211 eh->tlsdesc_got = htab->elf.sgotplt->size
2212 - elf_i386_compute_jump_table_size (htab);
2213 htab->elf.sgotplt->size += 8;
2214 h->got.offset = (bfd_vma) -2;
2216 if (! GOT_TLS_GDESC_P (tls_type)
2217 || GOT_TLS_GD_P (tls_type))
2219 h->got.offset = s->size;
2221 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2222 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2225 dyn = htab->elf.dynamic_sections_created;
2226 /* R_386_TLS_IE_32 needs one dynamic relocation,
2227 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2228 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2229 need two), R_386_TLS_GD needs one if local symbol and two if
2230 global. No dynamic relocation against resolved undefined weak
2231 symbol in executable. */
2232 if (tls_type == GOT_TLS_IE_BOTH)
2233 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2234 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2235 || (tls_type & GOT_TLS_IE))
2236 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2237 else if (GOT_TLS_GD_P (tls_type))
2238 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2239 else if (! GOT_TLS_GDESC_P (tls_type)
2240 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2241 && !resolved_to_zero)
2242 || h->root.type != bfd_link_hash_undefweak)
2243 && (bfd_link_pic (info)
2244 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2245 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2246 if (GOT_TLS_GDESC_P (tls_type))
2247 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2250 h->got.offset = (bfd_vma) -1;
2252 if (eh->dyn_relocs == NULL)
2255 /* In the shared -Bsymbolic case, discard space allocated for
2256 dynamic pc-relative relocs against symbols which turn out to be
2257 defined in regular objects. For the normal shared case, discard
2258 space for pc-relative relocs that have become local due to symbol
2259 visibility changes. */
2261 if (bfd_link_pic (info))
2263 /* The only reloc that uses pc_count is R_386_PC32, which will
2264 appear on a call or on something like ".long foo - .". We
2265 want calls to protected symbols to resolve directly to the
2266 function rather than going via the plt. If people want
2267 function pointer comparisons to work as expected then they
2268 should avoid writing assembly like ".long foo - .". */
2269 if (SYMBOL_CALLS_LOCAL (info, h))
2271 struct elf_dyn_relocs **pp;
2273 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2275 p->count -= p->pc_count;
2284 if (bed->os == is_vxworks)
2286 struct elf_dyn_relocs **pp;
2287 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2289 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2296 /* Also discard relocs on undefined weak syms with non-default
2297 visibility or in PIE. */
2298 if (eh->dyn_relocs != NULL
2299 && h->root.type == bfd_link_hash_undefweak)
2301 /* Undefined weak symbol is never bound locally in shared
2303 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2304 || resolved_to_zero)
2308 /* Keep dynamic non-GOT/non-PLT relocation so that we
2309 can branch to 0 without PLT. */
2310 struct elf_dyn_relocs **pp;
2312 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2313 if (p->pc_count == 0)
2317 /* Remove non-R_386_PC32 relocation. */
2318 p->count = p->pc_count;
2322 if (eh->dyn_relocs != NULL)
2324 /* Make sure undefined weak symbols are output
2325 as dynamic symbols in PIEs for dynamic non-GOT
2326 non-PLT reloations. */
2327 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2332 eh->dyn_relocs = NULL;
2334 else if (h->dynindx == -1
2335 && !h->forced_local)
2337 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2342 else if (ELIMINATE_COPY_RELOCS)
2344 /* For the non-shared case, discard space for relocs against
2345 symbols which turn out to need copy relocs or are not
2346 dynamic. Keep dynamic relocations for run-time function
2347 pointer initialization. */
2349 if ((!h->non_got_ref
2350 || eh->func_pointer_refcount > 0
2351 || (h->root.type == bfd_link_hash_undefweak
2352 && !resolved_to_zero))
2355 || (htab->elf.dynamic_sections_created
2356 && (h->root.type == bfd_link_hash_undefweak
2357 || h->root.type == bfd_link_hash_undefined))))
2359 /* Make sure this symbol is output as a dynamic symbol.
2360 Undefined weak syms won't yet be marked as dynamic. */
2361 if (h->dynindx == -1
2363 && !resolved_to_zero
2364 && h->root.type == bfd_link_hash_undefweak)
2366 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2370 /* If that succeeded, we know we'll be keeping all the
2372 if (h->dynindx != -1)
2376 eh->dyn_relocs = NULL;
2377 eh->func_pointer_refcount = 0;
2382 /* Finally, allocate space. */
2383 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2387 sreloc = elf_section_data (p->sec)->sreloc;
2389 BFD_ASSERT (sreloc != NULL);
2390 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2396 /* Allocate space in .plt, .got and associated reloc sections for
2397 local dynamic relocs. */
2400 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2402 struct elf_link_hash_entry *h
2403 = (struct elf_link_hash_entry *) *slot;
2405 if (h->type != STT_GNU_IFUNC
2409 || h->root.type != bfd_link_hash_defined)
2412 return elf_i386_allocate_dynrelocs (h, inf);
2415 /* Convert load via the GOT slot to load immediate. */
2418 elf_i386_convert_load (bfd *abfd, asection *sec,
2419 struct bfd_link_info *link_info)
2421 struct elf_x86_link_hash_table *htab;
2422 Elf_Internal_Shdr *symtab_hdr;
2423 Elf_Internal_Rela *internal_relocs;
2424 Elf_Internal_Rela *irel, *irelend;
2426 bfd_boolean changed;
2427 bfd_signed_vma *local_got_refcounts;
2429 /* Don't even try to convert non-ELF outputs. */
2430 if (!is_elf_hash_table (link_info->hash))
2433 /* Nothing to do if there is no need or no output. */
2434 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2435 || sec->need_convert_load == 0
2436 || bfd_is_abs_section (sec->output_section))
2439 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2441 /* Load the relocations for this section. */
2442 internal_relocs = (_bfd_elf_link_read_relocs
2443 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2444 link_info->keep_memory));
2445 if (internal_relocs == NULL)
2449 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
2450 local_got_refcounts = elf_local_got_refcounts (abfd);
2452 /* Get the section contents. */
2453 if (elf_section_data (sec)->this_hdr.contents != NULL)
2454 contents = elf_section_data (sec)->this_hdr.contents;
2457 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2461 irelend = internal_relocs + sec->reloc_count;
2462 for (irel = internal_relocs; irel < irelend; irel++)
2464 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2465 unsigned int r_symndx;
2466 struct elf_link_hash_entry *h;
2467 bfd_boolean converted;
2469 /* Don't convert R_386_GOT32 since we can't tell if it is applied
2470 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
2471 if (r_type != R_386_GOT32X)
2474 r_symndx = ELF32_R_SYM (irel->r_info);
2475 if (r_symndx < symtab_hdr->sh_info)
2476 h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner,
2477 (const Elf_Internal_Rela *) irel,
2481 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
2482 while (h->root.type == bfd_link_hash_indirect
2483 || h->root.type == bfd_link_hash_warning)
2484 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2487 /* STT_GNU_IFUNC must keep GOT32 relocations. */
2488 if (h != NULL && h->type == STT_GNU_IFUNC)
2492 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
2493 irel, h, &converted, link_info))
2498 changed = converted;
2501 if (h->got.refcount > 0)
2502 h->got.refcount -= 1;
2506 if (local_got_refcounts != NULL
2507 && local_got_refcounts[r_symndx] > 0)
2508 local_got_refcounts[r_symndx] -= 1;
2513 if (contents != NULL
2514 && elf_section_data (sec)->this_hdr.contents != contents)
2516 if (!changed && !link_info->keep_memory)
2520 /* Cache the section contents for elf_link_input_bfd. */
2521 elf_section_data (sec)->this_hdr.contents = contents;
2525 if (elf_section_data (sec)->relocs != internal_relocs)
2528 free (internal_relocs);
2530 elf_section_data (sec)->relocs = internal_relocs;
2536 if (contents != NULL
2537 && elf_section_data (sec)->this_hdr.contents != contents)
2539 if (internal_relocs != NULL
2540 && elf_section_data (sec)->relocs != internal_relocs)
2541 free (internal_relocs);
2545 /* Set the sizes of the dynamic sections. */
2548 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2550 struct elf_x86_link_hash_table *htab;
2556 htab = elf_x86_hash_table (info, I386_ELF_DATA);
2559 dynobj = htab->elf.dynobj;
2563 /* Set up .got offsets for local syms, and space for local dynamic
2565 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2567 bfd_signed_vma *local_got;
2568 bfd_signed_vma *end_local_got;
2569 char *local_tls_type;
2570 bfd_vma *local_tlsdesc_gotent;
2571 bfd_size_type locsymcount;
2572 Elf_Internal_Shdr *symtab_hdr;
2575 if (! is_i386_elf (ibfd))
2578 for (s = ibfd->sections; s != NULL; s = s->next)
2580 struct elf_dyn_relocs *p;
2582 if (!elf_i386_convert_load (ibfd, s, info))
2585 for (p = ((struct elf_dyn_relocs *)
2586 elf_section_data (s)->local_dynrel);
2590 if (!bfd_is_abs_section (p->sec)
2591 && bfd_is_abs_section (p->sec->output_section))
2593 /* Input section has been discarded, either because
2594 it is a copy of a linkonce section or due to
2595 linker script /DISCARD/, so we'll be discarding
2598 else if ((get_elf_i386_backend_data (output_bfd)->os
2600 && strcmp (p->sec->output_section->name,
2603 /* Relocations in vxworks .tls_vars sections are
2604 handled specially by the loader. */
2606 else if (p->count != 0)
2608 srel = elf_section_data (p->sec)->sreloc;
2609 srel->size += p->count * sizeof (Elf32_External_Rel);
2610 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2611 && (info->flags & DF_TEXTREL) == 0)
2613 info->flags |= DF_TEXTREL;
2614 if ((info->warn_shared_textrel && bfd_link_pic (info))
2615 || info->error_textrel)
2616 /* xgettext:c-format */
2617 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2618 p->sec->owner, p->sec);
2624 local_got = elf_local_got_refcounts (ibfd);
2628 symtab_hdr = &elf_symtab_hdr (ibfd);
2629 locsymcount = symtab_hdr->sh_info;
2630 end_local_got = local_got + locsymcount;
2631 local_tls_type = elf_x86_local_got_tls_type (ibfd);
2632 local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd);
2634 srel = htab->elf.srelgot;
2635 for (; local_got < end_local_got;
2636 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2638 *local_tlsdesc_gotent = (bfd_vma) -1;
2641 if (GOT_TLS_GDESC_P (*local_tls_type))
2643 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2644 - elf_i386_compute_jump_table_size (htab);
2645 htab->elf.sgotplt->size += 8;
2646 *local_got = (bfd_vma) -2;
2648 if (! GOT_TLS_GDESC_P (*local_tls_type)
2649 || GOT_TLS_GD_P (*local_tls_type))
2651 *local_got = s->size;
2653 if (GOT_TLS_GD_P (*local_tls_type)
2654 || *local_tls_type == GOT_TLS_IE_BOTH)
2657 if (bfd_link_pic (info)
2658 || GOT_TLS_GD_ANY_P (*local_tls_type)
2659 || (*local_tls_type & GOT_TLS_IE))
2661 if (*local_tls_type == GOT_TLS_IE_BOTH)
2662 srel->size += 2 * sizeof (Elf32_External_Rel);
2663 else if (GOT_TLS_GD_P (*local_tls_type)
2664 || ! GOT_TLS_GDESC_P (*local_tls_type))
2665 srel->size += sizeof (Elf32_External_Rel);
2666 if (GOT_TLS_GDESC_P (*local_tls_type))
2667 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2671 *local_got = (bfd_vma) -1;
2675 if (htab->tls_ld_or_ldm_got.refcount > 0)
2677 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2679 htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size;
2680 htab->elf.sgot->size += 8;
2681 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2684 htab->tls_ld_or_ldm_got.offset = -1;
2686 /* Allocate global sym .plt and .got entries, and space for global
2687 sym dynamic relocs. */
2688 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2690 /* Allocate .plt and .got entries, and space for local symbols. */
2691 htab_traverse (htab->loc_hash_table,
2692 elf_i386_allocate_local_dynrelocs,
2695 /* For every jump slot reserved in the sgotplt, reloc_count is
2696 incremented. However, when we reserve space for TLS descriptors,
2697 it's not incremented, so in order to compute the space reserved
2698 for them, it suffices to multiply the reloc count by the jump
2701 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2702 so that R_386_IRELATIVE entries come last. */
2703 if (htab->elf.srelplt)
2705 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2706 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2707 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2709 else if (htab->elf.irelplt)
2710 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2713 if (htab->elf.sgotplt)
2715 /* Don't allocate .got.plt section if there are no GOT nor PLT
2716 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2717 if ((htab->elf.hgot == NULL
2718 || !htab->elf.hgot->ref_regular_nonweak)
2719 && (htab->elf.sgotplt->size
2720 == get_elf_backend_data (output_bfd)->got_header_size)
2721 && (htab->elf.splt == NULL
2722 || htab->elf.splt->size == 0)
2723 && (htab->elf.sgot == NULL
2724 || htab->elf.sgot->size == 0)
2725 && (htab->elf.iplt == NULL
2726 || htab->elf.iplt->size == 0)
2727 && (htab->elf.igotplt == NULL
2728 || htab->elf.igotplt->size == 0))
2729 htab->elf.sgotplt->size = 0;
2732 if (_bfd_elf_eh_frame_present (info))
2734 if (htab->plt_eh_frame != NULL
2735 && htab->elf.splt != NULL
2736 && htab->elf.splt->size != 0
2737 && !bfd_is_abs_section (htab->elf.splt->output_section))
2738 htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size;
2740 if (htab->plt_got_eh_frame != NULL
2741 && htab->plt_got != NULL
2742 && htab->plt_got->size != 0
2743 && !bfd_is_abs_section (htab->plt_got->output_section))
2744 htab->plt_got_eh_frame->size
2745 = htab->non_lazy_plt->eh_frame_plt_size;
2747 /* Unwind info for the second PLT and .plt.got sections are
2749 if (htab->plt_second_eh_frame != NULL
2750 && htab->plt_second != NULL
2751 && htab->plt_second->size != 0
2752 && !bfd_is_abs_section (htab->plt_second->output_section))
2753 htab->plt_second_eh_frame->size
2754 = htab->non_lazy_plt->eh_frame_plt_size;
2757 /* We now have determined the sizes of the various dynamic sections.
2758 Allocate memory for them. */
2760 for (s = dynobj->sections; s != NULL; s = s->next)
2762 bfd_boolean strip_section = TRUE;
2764 if ((s->flags & SEC_LINKER_CREATED) == 0)
2767 if (s == htab->elf.splt
2768 || s == htab->elf.sgot)
2770 /* Strip this section if we don't need it; see the
2772 /* We'd like to strip these sections if they aren't needed, but if
2773 we've exported dynamic symbols from them we must leave them.
2774 It's too late to tell BFD to get rid of the symbols. */
2776 if (htab->elf.hplt != NULL)
2777 strip_section = FALSE;
2779 else if (s == htab->elf.sgotplt
2780 || s == htab->elf.iplt
2781 || s == htab->elf.igotplt
2782 || s == htab->plt_second
2783 || s == htab->plt_got
2784 || s == htab->plt_eh_frame
2785 || s == htab->plt_got_eh_frame
2786 || s == htab->plt_second_eh_frame
2787 || s == htab->elf.sdynbss
2788 || s == htab->elf.sdynrelro)
2790 /* Strip these too. */
2792 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2795 && s != htab->elf.srelplt
2796 && s != htab->srelplt2)
2799 /* We use the reloc_count field as a counter if we need
2800 to copy relocs into the output file. */
2805 /* It's not one of our sections, so don't allocate space. */
2811 /* If we don't need this section, strip it from the
2812 output file. This is mostly to handle .rel.bss and
2813 .rel.plt. We must create both sections in
2814 create_dynamic_sections, because they must be created
2815 before the linker maps input sections to output
2816 sections. The linker does that before
2817 adjust_dynamic_symbol is called, and it is that
2818 function which decides whether anything needs to go
2819 into these sections. */
2821 s->flags |= SEC_EXCLUDE;
2825 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2828 /* Allocate memory for the section contents. We use bfd_zalloc
2829 here in case unused entries are not reclaimed before the
2830 section's contents are written out. This should not happen,
2831 but this way if it does, we get a R_386_NONE reloc instead
2833 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2834 if (s->contents == NULL)
2838 if (htab->plt_eh_frame != NULL
2839 && htab->plt_eh_frame->contents != NULL)
2841 memcpy (htab->plt_eh_frame->contents,
2842 htab->plt.eh_frame_plt,
2843 htab->plt_eh_frame->size);
2844 bfd_put_32 (dynobj, htab->elf.splt->size,
2845 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2848 if (htab->plt_got_eh_frame != NULL
2849 && htab->plt_got_eh_frame->contents != NULL)
2851 memcpy (htab->plt_got_eh_frame->contents,
2852 htab->non_lazy_plt->eh_frame_plt,
2853 htab->plt_got_eh_frame->size);
2854 bfd_put_32 (dynobj, htab->plt_got->size,
2855 (htab->plt_got_eh_frame->contents
2856 + PLT_FDE_LEN_OFFSET));
2859 if (htab->plt_second_eh_frame != NULL
2860 && htab->plt_second_eh_frame->contents != NULL)
2862 memcpy (htab->plt_second_eh_frame->contents,
2863 htab->non_lazy_plt->eh_frame_plt,
2864 htab->plt_second_eh_frame->size);
2865 bfd_put_32 (dynobj, htab->plt_second->size,
2866 (htab->plt_second_eh_frame->contents
2867 + PLT_FDE_LEN_OFFSET));
2870 if (htab->elf.dynamic_sections_created)
2872 /* Add some entries to the .dynamic section. We fill in the
2873 values later, in elf_i386_finish_dynamic_sections, but we
2874 must add the entries now so that we get the correct size for
2875 the .dynamic section. The DT_DEBUG entry is filled in by the
2876 dynamic linker and used by the debugger. */
2877 #define add_dynamic_entry(TAG, VAL) \
2878 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2880 if (bfd_link_executable (info))
2882 if (!add_dynamic_entry (DT_DEBUG, 0))
2886 if (htab->elf.splt->size != 0)
2888 /* DT_PLTGOT is used by prelink even if there is no PLT
2890 if (!add_dynamic_entry (DT_PLTGOT, 0))
2894 if (htab->elf.srelplt->size != 0)
2896 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2897 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2898 || !add_dynamic_entry (DT_JMPREL, 0))
2904 if (!add_dynamic_entry (DT_REL, 0)
2905 || !add_dynamic_entry (DT_RELSZ, 0)
2906 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2909 /* If any dynamic relocs apply to a read-only section,
2910 then we need a DT_TEXTREL entry. */
2911 if ((info->flags & DF_TEXTREL) == 0)
2912 elf_link_hash_traverse (&htab->elf,
2913 _bfd_x86_elf_readonly_dynrelocs,
2916 if ((info->flags & DF_TEXTREL) != 0)
2918 if (htab->readonly_dynrelocs_against_ifunc)
2920 info->callbacks->einfo
2921 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
2922 bfd_set_error (bfd_error_bad_value);
2926 if (!add_dynamic_entry (DT_TEXTREL, 0))
2930 if (get_elf_i386_backend_data (output_bfd)->os == is_vxworks
2931 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2934 #undef add_dynamic_entry
2939 /* Set the correct type for an x86 ELF section. We do this by the
2940 section name, which is a hack, but ought to work. */
2943 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2944 Elf_Internal_Shdr *hdr,
2949 name = bfd_get_section_name (abfd, sec);
2951 /* This is an ugly, but unfortunately necessary hack that is
2952 needed when producing EFI binaries on x86. It tells
2953 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2954 containing ELF relocation info. We need this hack in order to
2955 be able to generate ELF binaries that can be translated into
2956 EFI applications (which are essentially COFF objects). Those
2957 files contain a COFF ".reloc" section inside an ELFNN object,
2958 which would normally cause BFD to segfault because it would
2959 attempt to interpret this section as containing relocation
2960 entries for section "oc". With this hack enabled, ".reloc"
2961 will be treated as a normal data section, which will avoid the
2962 segfault. However, you won't be able to create an ELFNN binary
2963 with a section named "oc" that needs relocations, but that's
2964 the kind of ugly side-effects you get when detecting section
2965 types based on their names... In practice, this limitation is
2966 unlikely to bite. */
2967 if (strcmp (name, ".reloc") == 0)
2968 hdr->sh_type = SHT_PROGBITS;
2973 /* Return the relocation value for @tpoff relocation
2974 if STT_TLS virtual address is ADDRESS. */
2977 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2979 struct elf_link_hash_table *htab = elf_hash_table (info);
2980 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2981 bfd_vma static_tls_size;
2983 /* If tls_sec is NULL, we should have signalled an error already. */
2984 if (htab->tls_sec == NULL)
2987 /* Consider special static TLS alignment requirements. */
2988 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2989 return static_tls_size + htab->tls_sec->vma - address;
2992 /* Relocate an i386 ELF section. */
2995 elf_i386_relocate_section (bfd *output_bfd,
2996 struct bfd_link_info *info,
2998 asection *input_section,
3000 Elf_Internal_Rela *relocs,
3001 Elf_Internal_Sym *local_syms,
3002 asection **local_sections)
3004 struct elf_x86_link_hash_table *htab;
3005 Elf_Internal_Shdr *symtab_hdr;
3006 struct elf_link_hash_entry **sym_hashes;
3007 bfd_vma *local_got_offsets;
3008 bfd_vma *local_tlsdesc_gotents;
3009 Elf_Internal_Rela *rel;
3010 Elf_Internal_Rela *wrel;
3011 Elf_Internal_Rela *relend;
3012 bfd_boolean is_vxworks_tls;
3013 unsigned plt_entry_size;
3015 BFD_ASSERT (is_i386_elf (input_bfd));
3017 /* Skip if check_relocs failed. */
3018 if (input_section->check_relocs_failed)
3021 htab = elf_x86_hash_table (info, I386_ELF_DATA);
3024 symtab_hdr = &elf_symtab_hdr (input_bfd);
3025 sym_hashes = elf_sym_hashes (input_bfd);
3026 local_got_offsets = elf_local_got_offsets (input_bfd);
3027 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
3028 /* We have to handle relocations in vxworks .tls_vars sections
3029 specially, because the dynamic loader is 'weird'. */
3030 is_vxworks_tls = ((get_elf_i386_backend_data (output_bfd)->os
3032 && bfd_link_pic (info)
3033 && !strcmp (input_section->output_section->name,
3036 _bfd_x86_elf_set_tls_module_base (info);
3038 plt_entry_size = htab->plt.plt_entry_size;
3040 rel = wrel = relocs;
3041 relend = relocs + input_section->reloc_count;
3042 for (; rel < relend; wrel++, rel++)
3044 unsigned int r_type;
3045 reloc_howto_type *howto;
3046 unsigned long r_symndx;
3047 struct elf_link_hash_entry *h;
3048 struct elf_x86_link_hash_entry *eh;
3049 Elf_Internal_Sym *sym;
3051 bfd_vma off, offplt, plt_offset;
3053 bfd_boolean unresolved_reloc;
3054 bfd_reloc_status_type r;
3058 asection *resolved_plt;
3059 bfd_boolean resolved_to_zero;
3060 bfd_boolean relative_reloc;
3062 r_type = ELF32_R_TYPE (rel->r_info);
3063 if (r_type == R_386_GNU_VTINHERIT
3064 || r_type == R_386_GNU_VTENTRY)
3071 if ((indx = r_type) >= R_386_standard
3072 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3073 >= R_386_ext - R_386_standard)
3074 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3075 >= R_386_ext2 - R_386_ext))
3076 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
3078 howto = elf_howto_table + indx;
3080 r_symndx = ELF32_R_SYM (rel->r_info);
3084 unresolved_reloc = FALSE;
3085 if (r_symndx < symtab_hdr->sh_info)
3087 sym = local_syms + r_symndx;
3088 sec = local_sections[r_symndx];
3089 relocation = (sec->output_section->vma
3090 + sec->output_offset
3092 st_size = sym->st_size;
3094 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3095 && ((sec->flags & SEC_MERGE) != 0
3096 || (bfd_link_relocatable (info)
3097 && sec->output_offset != 0)))
3100 bfd_byte *where = contents + rel->r_offset;
3102 switch (howto->size)
3105 addend = bfd_get_8 (input_bfd, where);
3106 if (howto->pc_relative)
3108 addend = (addend ^ 0x80) - 0x80;
3113 addend = bfd_get_16 (input_bfd, where);
3114 if (howto->pc_relative)
3116 addend = (addend ^ 0x8000) - 0x8000;
3121 addend = bfd_get_32 (input_bfd, where);
3122 if (howto->pc_relative)
3124 addend = (addend ^ 0x80000000) - 0x80000000;
3132 if (bfd_link_relocatable (info))
3133 addend += sec->output_offset;
3136 asection *msec = sec;
3137 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3139 addend -= relocation;
3140 addend += msec->output_section->vma + msec->output_offset;
3143 switch (howto->size)
3146 /* FIXME: overflow checks. */
3147 if (howto->pc_relative)
3149 bfd_put_8 (input_bfd, addend, where);
3152 if (howto->pc_relative)
3154 bfd_put_16 (input_bfd, addend, where);
3157 if (howto->pc_relative)
3159 bfd_put_32 (input_bfd, addend, where);
3163 else if (!bfd_link_relocatable (info)
3164 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3166 /* Relocate against local STT_GNU_IFUNC symbol. */
3167 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
3172 /* Set STT_GNU_IFUNC symbol value. */
3173 h->root.u.def.value = sym->st_value;
3174 h->root.u.def.section = sec;
3179 bfd_boolean warned ATTRIBUTE_UNUSED;
3180 bfd_boolean ignored ATTRIBUTE_UNUSED;
3182 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3183 r_symndx, symtab_hdr, sym_hashes,
3185 unresolved_reloc, warned, ignored);
3189 if (sec != NULL && discarded_section (sec))
3191 _bfd_clear_contents (howto, input_bfd, input_section,
3192 contents + rel->r_offset);
3193 wrel->r_offset = rel->r_offset;
3197 /* For ld -r, remove relocations in debug sections against
3198 sections defined in discarded sections. Not done for
3199 eh_frame editing code expects to be present. */
3200 if (bfd_link_relocatable (info)
3201 && (input_section->flags & SEC_DEBUGGING))
3207 if (bfd_link_relocatable (info))
3214 eh = (struct elf_x86_link_hash_entry *) h;
3216 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3217 it here if it is defined in a non-shared object. */
3219 && h->type == STT_GNU_IFUNC
3222 asection *gotplt, *base_got;
3226 if ((input_section->flags & SEC_ALLOC) == 0)
3228 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3229 sections because such sections are not SEC_ALLOC and
3230 thus ld.so will not process them. */
3231 if ((input_section->flags & SEC_DEBUGGING) != 0)
3236 /* STT_GNU_IFUNC symbol must go through PLT. */
3237 if (htab->elf.splt != NULL)
3239 if (htab->plt_second != NULL)
3241 resolved_plt = htab->plt_second;
3242 plt_offset = eh->plt_second.offset;
3246 resolved_plt = htab->elf.splt;
3247 plt_offset = h->plt.offset;
3249 gotplt = htab->elf.sgotplt;
3253 resolved_plt = htab->elf.iplt;
3254 plt_offset = h->plt.offset;
3255 gotplt = htab->elf.igotplt;
3265 base_got = htab->elf.sgot;
3266 off = h->got.offset;
3268 if (base_got == NULL)
3271 if (off == (bfd_vma) -1)
3273 /* We can't use h->got.offset here to save state, or
3274 even just remember the offset, as finish_dynamic_symbol
3275 would use that as offset into .got. */
3277 if (h->plt.offset == (bfd_vma) -1)
3280 if (htab->elf.splt != NULL)
3282 plt_index = (h->plt.offset / plt_entry_size
3283 - htab->plt.has_plt0);
3284 off = (plt_index + 3) * 4;
3285 base_got = htab->elf.sgotplt;
3289 plt_index = h->plt.offset / plt_entry_size;
3290 off = plt_index * 4;
3291 base_got = htab->elf.igotplt;
3294 if (h->dynindx == -1
3298 /* This references the local defitionion. We must
3299 initialize this entry in the global offset table.
3300 Since the offset must always be a multiple of 8,
3301 we use the least significant bit to record
3302 whether we have initialized it already.
3304 When doing a dynamic link, we create a .rela.got
3305 relocation entry to initialize the value. This
3306 is done in the finish_dynamic_symbol routine. */
3311 bfd_put_32 (output_bfd, relocation,
3312 base_got->contents + off);
3320 relocation = (base_got->output_section->vma
3321 + base_got->output_offset + off
3322 - gotplt->output_section->vma
3323 - gotplt->output_offset);
3325 if (rel->r_offset > 1
3326 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3327 && *(contents + rel->r_offset - 2) != 0x8d)
3329 if (bfd_link_pic (info))
3330 goto disallow_got32;
3332 /* Add the GOT base if there is no base register. */
3333 relocation += (gotplt->output_section->vma
3334 + gotplt->output_offset);
3336 else if (htab->elf.splt == NULL)
3338 /* Adjust for static executables. */
3339 relocation += gotplt->output_offset;
3345 if (h->plt.offset == (bfd_vma) -1)
3347 /* Handle static pointers of STT_GNU_IFUNC symbols. */
3348 if (r_type == R_386_32
3349 && (input_section->flags & SEC_CODE) == 0)
3350 goto do_ifunc_pointer;
3351 goto bad_ifunc_reloc;
3354 relocation = (resolved_plt->output_section->vma
3355 + resolved_plt->output_offset + plt_offset);
3361 if (h->root.root.string)
3362 name = h->root.root.string;
3364 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3367 /* xgettext:c-format */
3368 (_("%B: relocation %s against STT_GNU_IFUNC "
3369 "symbol `%s' isn't supported"), input_bfd,
3371 bfd_set_error (bfd_error_bad_value);
3375 /* Generate dynamic relcoation only when there is a
3376 non-GOT reference in a shared object. */
3377 if ((bfd_link_pic (info) && h->non_got_ref)
3378 || h->plt.offset == (bfd_vma) -1)
3380 Elf_Internal_Rela outrel;
3385 /* Need a dynamic relocation to get the real function
3387 offset = _bfd_elf_section_offset (output_bfd,
3391 if (offset == (bfd_vma) -1
3392 || offset == (bfd_vma) -2)
3395 outrel.r_offset = (input_section->output_section->vma
3396 + input_section->output_offset
3399 if (h->dynindx == -1
3401 || bfd_link_executable (info))
3403 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
3404 h->root.root.string,
3405 h->root.u.def.section->owner);
3407 /* This symbol is resolved locally. */
3408 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3409 bfd_put_32 (output_bfd,
3410 (h->root.u.def.value
3411 + h->root.u.def.section->output_section->vma
3412 + h->root.u.def.section->output_offset),
3416 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3418 /* Dynamic relocations are stored in
3419 1. .rel.ifunc section in PIC object.
3420 2. .rel.got section in dynamic executable.
3421 3. .rel.iplt section in static executable. */
3422 if (bfd_link_pic (info))
3423 sreloc = htab->elf.irelifunc;
3424 else if (htab->elf.splt != NULL)
3425 sreloc = htab->elf.srelgot;
3427 sreloc = htab->elf.irelplt;
3428 elf_append_rel (output_bfd, sreloc, &outrel);
3430 /* If this reloc is against an external symbol, we
3431 do not want to fiddle with the addend. Otherwise,
3432 we need to include the symbol value so that it
3433 becomes an addend for the dynamic reloc. For an
3434 internal symbol, we have updated addend. */
3443 relocation -= (gotplt->output_section->vma
3444 + gotplt->output_offset);
3449 resolved_to_zero = (eh != NULL
3450 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
3458 /* Avoid optimizing _DYNAMIC since ld.so may use its
3459 link-time address. */
3460 if (h == htab->elf.hdynamic)
3463 if (bfd_link_pic (info))
3465 /* It is OK to convert mov to lea and convert indirect
3466 branch to direct branch. It is OK to convert adc,
3467 add, and, cmp, or, sbb, sub, test, xor only when PIC
3469 unsigned int opcode, addend;
3470 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
3473 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3474 if (opcode != 0x8b && opcode != 0xff)
3478 /* Resolve "mov GOT[(%reg)], %reg",
3479 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
3480 and "binop foo@GOT[(%reg)], %reg". */
3482 || (h->plt.offset == (bfd_vma) -1
3483 && h->got.offset == (bfd_vma) -1)
3484 || htab->elf.sgotplt == NULL)
3487 offplt = (htab->elf.sgotplt->output_section->vma
3488 + htab->elf.sgotplt->output_offset);
3490 /* It is relative to .got.plt section. */
3491 if (h->got.offset != (bfd_vma) -1)
3492 /* Use GOT entry. Mask off the least significant bit in
3493 GOT offset which may be set by R_386_GOT32 processing
3495 relocation = (htab->elf.sgot->output_section->vma
3496 + htab->elf.sgot->output_offset
3497 + (h->got.offset & ~1) - offplt);
3499 /* Use GOTPLT entry. */
3500 relocation = (h->plt.offset / plt_entry_size
3501 - htab->plt.has_plt0 + 3) * 4;
3503 if (!bfd_link_pic (info))
3505 /* If not PIC, add the .got.plt section address for
3506 baseless addressing. */
3508 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3509 if ((modrm & 0xc7) == 0x5)
3510 relocation += offplt;
3513 unresolved_reloc = FALSE;
3518 /* Relocation is to the entry for this symbol in the global
3520 if (htab->elf.sgot == NULL)
3523 relative_reloc = FALSE;
3528 off = h->got.offset;
3529 dyn = htab->elf.dynamic_sections_created;
3530 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3531 bfd_link_pic (info),
3533 || (bfd_link_pic (info)
3534 && SYMBOL_REFERENCES_LOCAL (info, h))
3535 || (ELF_ST_VISIBILITY (h->other)
3536 && h->root.type == bfd_link_hash_undefweak))
3538 /* This is actually a static link, or it is a
3539 -Bsymbolic link and the symbol is defined
3540 locally, or the symbol was forced to be local
3541 because of a version file. We must initialize
3542 this entry in the global offset table. Since the
3543 offset must always be a multiple of 4, we use the
3544 least significant bit to record whether we have
3545 initialized it already.
3547 When doing a dynamic link, we create a .rel.got
3548 relocation entry to initialize the value. This
3549 is done in the finish_dynamic_symbol routine. */
3554 bfd_put_32 (output_bfd, relocation,
3555 htab->elf.sgot->contents + off);
3558 if (h->dynindx == -1
3560 && h->root.type != bfd_link_hash_undefweak
3561 && bfd_link_pic (info))
3563 /* PR ld/21402: If this symbol isn't dynamic
3564 in PIC, generate R_386_RELATIVE here. */
3565 eh->no_finish_dynamic_symbol = 1;
3566 relative_reloc = TRUE;
3571 unresolved_reloc = FALSE;
3575 if (local_got_offsets == NULL)
3578 off = local_got_offsets[r_symndx];
3580 /* The offset must always be a multiple of 4. We use
3581 the least significant bit to record whether we have
3582 already generated the necessary reloc. */
3587 bfd_put_32 (output_bfd, relocation,
3588 htab->elf.sgot->contents + off);
3589 local_got_offsets[r_symndx] |= 1;
3591 if (bfd_link_pic (info))
3592 relative_reloc = TRUE;
3599 Elf_Internal_Rela outrel;
3601 s = htab->elf.srelgot;
3605 outrel.r_offset = (htab->elf.sgot->output_section->vma
3606 + htab->elf.sgot->output_offset
3608 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3609 elf_append_rel (output_bfd, s, &outrel);
3612 if (off >= (bfd_vma) -2)
3615 relocation = (htab->elf.sgot->output_section->vma
3616 + htab->elf.sgot->output_offset + off);
3617 if (rel->r_offset > 1
3618 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
3619 && *(contents + rel->r_offset - 2) != 0x8d)
3621 if (bfd_link_pic (info))
3623 /* For PIC, disallow R_386_GOT32 without a base
3624 register, except for "lea foo@GOT, %reg", since
3625 we don't know what the GOT base is. */
3629 if (h == NULL || h->root.root.string == NULL)
3630 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3633 name = h->root.root.string;
3636 /* xgettext:c-format */
3637 (_("%B: direct GOT relocation %s against `%s'"
3638 " without base register can not be used"
3639 " when making a shared object"),
3640 input_bfd, howto->name, name);
3641 bfd_set_error (bfd_error_bad_value);
3647 /* Subtract the .got.plt section address only with a base
3649 relocation -= (htab->elf.sgotplt->output_section->vma
3650 + htab->elf.sgotplt->output_offset);
3656 /* Relocation is relative to the start of the global offset
3659 /* Check to make sure it isn't a protected function or data
3660 symbol for shared library since it may not be local when
3661 used as function address or with copy relocation. We also
3662 need to make sure that a symbol is referenced locally. */
3663 if (!bfd_link_executable (info) && h)
3665 if (!h->def_regular)
3669 switch (ELF_ST_VISIBILITY (h->other))
3672 v = _("hidden symbol");
3675 v = _("internal symbol");
3678 v = _("protected symbol");
3686 /* xgettext:c-format */
3687 (_("%B: relocation R_386_GOTOFF against undefined %s"
3688 " `%s' can not be used when making a shared object"),
3689 input_bfd, v, h->root.root.string);
3690 bfd_set_error (bfd_error_bad_value);
3693 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3694 && (h->type == STT_FUNC
3695 || h->type == STT_OBJECT)
3696 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3699 /* xgettext:c-format */
3700 (_("%B: relocation R_386_GOTOFF against protected %s"
3701 " `%s' can not be used when making a shared object"),
3703 h->type == STT_FUNC ? "function" : "data",
3704 h->root.root.string);
3705 bfd_set_error (bfd_error_bad_value);
3710 /* Note that sgot is not involved in this
3711 calculation. We always want the start of .got.plt. If we
3712 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3713 permitted by the ABI, we might have to change this
3715 relocation -= htab->elf.sgotplt->output_section->vma
3716 + htab->elf.sgotplt->output_offset;
3720 /* Use global offset table as symbol value. */
3721 relocation = htab->elf.sgotplt->output_section->vma
3722 + htab->elf.sgotplt->output_offset;
3723 unresolved_reloc = FALSE;
3727 /* Relocation is to the entry for this symbol in the
3728 procedure linkage table. */
3730 /* Resolve a PLT32 reloc against a local symbol directly,
3731 without using the procedure linkage table. */
3735 if ((h->plt.offset == (bfd_vma) -1
3736 && eh->plt_got.offset == (bfd_vma) -1)
3737 || htab->elf.splt == NULL)
3739 /* We didn't make a PLT entry for this symbol. This
3740 happens when statically linking PIC code, or when
3741 using -Bsymbolic. */
3745 if (h->plt.offset != (bfd_vma) -1)
3747 if (htab->plt_second != NULL)
3749 resolved_plt = htab->plt_second;
3750 plt_offset = eh->plt_second.offset;
3754 resolved_plt = htab->elf.splt;
3755 plt_offset = h->plt.offset;
3760 resolved_plt = htab->plt_got;
3761 plt_offset = eh->plt_got.offset;
3764 relocation = (resolved_plt->output_section->vma
3765 + resolved_plt->output_offset
3767 unresolved_reloc = FALSE;
3771 /* Set to symbol size. */
3772 relocation = st_size;
3777 if ((input_section->flags & SEC_ALLOC) == 0
3781 /* Copy dynamic function pointer relocations. Don't generate
3782 dynamic relocations against resolved undefined weak symbols
3783 in PIE, except for R_386_PC32. */
3784 if ((bfd_link_pic (info)
3786 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3787 && (!resolved_to_zero
3788 || r_type == R_386_PC32))
3789 || h->root.type != bfd_link_hash_undefweak))
3790 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3791 || !SYMBOL_CALLS_LOCAL (info, h)))
3792 || (ELIMINATE_COPY_RELOCS
3793 && !bfd_link_pic (info)
3797 || eh->func_pointer_refcount > 0
3798 || (h->root.type == bfd_link_hash_undefweak
3799 && !resolved_to_zero))
3800 && ((h->def_dynamic && !h->def_regular)
3801 /* Undefined weak symbol is bound locally when
3803 || h->root.type == bfd_link_hash_undefweak)))
3805 Elf_Internal_Rela outrel;
3806 bfd_boolean skip, relocate;
3809 /* When generating a shared object, these relocations
3810 are copied into the output file to be resolved at run
3817 _bfd_elf_section_offset (output_bfd, info, input_section,
3819 if (outrel.r_offset == (bfd_vma) -1)
3821 else if (outrel.r_offset == (bfd_vma) -2)
3822 skip = TRUE, relocate = TRUE;
3823 outrel.r_offset += (input_section->output_section->vma
3824 + input_section->output_offset);
3827 memset (&outrel, 0, sizeof outrel);
3830 && (r_type == R_386_PC32
3831 || !(bfd_link_executable (info)
3832 || SYMBOLIC_BIND (info, h))
3833 || !h->def_regular))
3834 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3837 /* This symbol is local, or marked to become local. */
3839 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3842 sreloc = elf_section_data (input_section)->sreloc;
3844 if (sreloc == NULL || sreloc->contents == NULL)
3846 r = bfd_reloc_notsupported;
3847 goto check_relocation_error;
3850 elf_append_rel (output_bfd, sreloc, &outrel);
3852 /* If this reloc is against an external symbol, we do
3853 not want to fiddle with the addend. Otherwise, we
3854 need to include the symbol value so that it becomes
3855 an addend for the dynamic reloc. */
3862 if (!bfd_link_executable (info))
3864 Elf_Internal_Rela outrel;
3867 outrel.r_offset = rel->r_offset
3868 + input_section->output_section->vma
3869 + input_section->output_offset;
3870 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3871 sreloc = elf_section_data (input_section)->sreloc;
3874 elf_append_rel (output_bfd, sreloc, &outrel);
3879 case R_386_TLS_GOTDESC:
3880 case R_386_TLS_DESC_CALL:
3881 case R_386_TLS_IE_32:
3882 case R_386_TLS_GOTIE:
3883 tls_type = GOT_UNKNOWN;
3884 if (h == NULL && local_got_offsets)
3885 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
3887 tls_type = elf_x86_hash_entry(h)->tls_type;
3888 if (tls_type == GOT_TLS_IE)
3889 tls_type = GOT_TLS_IE_NEG;
3891 if (! elf_i386_tls_transition (info, input_bfd,
3892 input_section, contents,
3893 symtab_hdr, sym_hashes,
3894 &r_type, tls_type, rel,
3895 relend, h, r_symndx, TRUE))
3898 if (r_type == R_386_TLS_LE_32)
3900 BFD_ASSERT (! unresolved_reloc);
3901 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3906 /* GD->LE transition. */
3907 type = *(contents + rel->r_offset - 2);
3911 leal foo@tlsgd(,%ebx,1), %eax
3912 call ___tls_get_addr@PLT
3915 subl $foo@tpoff, %eax
3916 (6 byte form of subl). */
3917 roff = rel->r_offset + 5;
3922 leal foo@tlsgd(%ebx), %eax
3923 call ___tls_get_addr@PLT
3926 leal foo@tlsgd(%reg), %eax
3927 call *___tls_get_addr@GOT(%reg)
3928 which may be converted to
3929 addr32 call ___tls_get_addr
3931 movl %gs:0, %eax; subl $foo@tpoff, %eax
3932 (6 byte form of subl). */
3933 roff = rel->r_offset + 6;
3935 memcpy (contents + roff - 8,
3936 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3937 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3939 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
3944 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3946 /* GDesc -> LE transition.
3947 It's originally something like:
3948 leal x@tlsdesc(%ebx), %eax
3952 Registers other than %eax may be set up here. */
3957 roff = rel->r_offset;
3958 val = bfd_get_8 (input_bfd, contents + roff - 1);
3960 /* Now modify the instruction as appropriate. */
3961 /* aoliva FIXME: remove the above and xor the byte
3963 bfd_put_8 (output_bfd, val ^ 0x86,
3964 contents + roff - 1);
3965 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3969 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3971 /* GDesc -> LE transition.
3979 roff = rel->r_offset;
3980 bfd_put_8 (output_bfd, 0x66, contents + roff);
3981 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3984 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3988 /* IE->LE transition:
3989 Originally it can be one of:
3997 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4000 /* movl foo, %eax. */
4001 bfd_put_8 (output_bfd, 0xb8,
4002 contents + rel->r_offset - 1);
4008 type = bfd_get_8 (input_bfd,
4009 contents + rel->r_offset - 2);
4014 bfd_put_8 (output_bfd, 0xc7,
4015 contents + rel->r_offset - 2);
4016 bfd_put_8 (output_bfd,
4017 0xc0 | ((val >> 3) & 7),
4018 contents + rel->r_offset - 1);
4022 bfd_put_8 (output_bfd, 0x81,
4023 contents + rel->r_offset - 2);
4024 bfd_put_8 (output_bfd,
4025 0xc0 | ((val >> 3) & 7),
4026 contents + rel->r_offset - 1);
4033 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4034 contents + rel->r_offset);
4039 unsigned int val, type;
4041 /* {IE_32,GOTIE}->LE transition:
4042 Originally it can be one of:
4043 subl foo(%reg1), %reg2
4044 movl foo(%reg1), %reg2
4045 addl foo(%reg1), %reg2
4048 movl $foo, %reg2 (6 byte form)
4049 addl $foo, %reg2. */
4050 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4051 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4055 bfd_put_8 (output_bfd, 0xc7,
4056 contents + rel->r_offset - 2);
4057 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4058 contents + rel->r_offset - 1);
4060 else if (type == 0x2b)
4063 bfd_put_8 (output_bfd, 0x81,
4064 contents + rel->r_offset - 2);
4065 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4066 contents + rel->r_offset - 1);
4068 else if (type == 0x03)
4071 bfd_put_8 (output_bfd, 0x81,
4072 contents + rel->r_offset - 2);
4073 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4074 contents + rel->r_offset - 1);
4078 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4079 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4080 contents + rel->r_offset);
4082 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4083 contents + rel->r_offset);
4088 if (htab->elf.sgot == NULL)
4093 off = h->got.offset;
4094 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
4098 if (local_got_offsets == NULL)
4101 off = local_got_offsets[r_symndx];
4102 offplt = local_tlsdesc_gotents[r_symndx];
4109 Elf_Internal_Rela outrel;
4113 if (htab->elf.srelgot == NULL)
4116 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4118 if (GOT_TLS_GDESC_P (tls_type))
4121 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4122 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4123 <= htab->elf.sgotplt->size);
4124 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4125 + htab->elf.sgotplt->output_offset
4127 + htab->sgotplt_jump_table_size);
4128 sreloc = htab->elf.srelplt;
4129 loc = sreloc->contents;
4130 loc += (htab->next_tls_desc_index++
4131 * sizeof (Elf32_External_Rel));
4132 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4133 <= sreloc->contents + sreloc->size);
4134 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4137 BFD_ASSERT (! unresolved_reloc);
4138 bfd_put_32 (output_bfd,
4139 relocation - _bfd_x86_elf_dtpoff_base (info),
4140 htab->elf.sgotplt->contents + offplt
4141 + htab->sgotplt_jump_table_size + 4);
4145 bfd_put_32 (output_bfd, 0,
4146 htab->elf.sgotplt->contents + offplt
4147 + htab->sgotplt_jump_table_size + 4);
4151 sreloc = htab->elf.srelgot;
4153 outrel.r_offset = (htab->elf.sgot->output_section->vma
4154 + htab->elf.sgot->output_offset + off);
4156 if (GOT_TLS_GD_P (tls_type))
4157 dr_type = R_386_TLS_DTPMOD32;
4158 else if (GOT_TLS_GDESC_P (tls_type))
4160 else if (tls_type == GOT_TLS_IE_POS)
4161 dr_type = R_386_TLS_TPOFF;
4163 dr_type = R_386_TLS_TPOFF32;
4165 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4166 bfd_put_32 (output_bfd,
4167 relocation - _bfd_x86_elf_dtpoff_base (info),
4168 htab->elf.sgot->contents + off);
4169 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4170 bfd_put_32 (output_bfd,
4171 _bfd_x86_elf_dtpoff_base (info) - relocation,
4172 htab->elf.sgot->contents + off);
4173 else if (dr_type != R_386_TLS_DESC)
4174 bfd_put_32 (output_bfd, 0,
4175 htab->elf.sgot->contents + off);
4176 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4178 elf_append_rel (output_bfd, sreloc, &outrel);
4180 if (GOT_TLS_GD_P (tls_type))
4184 BFD_ASSERT (! unresolved_reloc);
4185 bfd_put_32 (output_bfd,
4186 relocation - _bfd_x86_elf_dtpoff_base (info),
4187 htab->elf.sgot->contents + off + 4);
4191 bfd_put_32 (output_bfd, 0,
4192 htab->elf.sgot->contents + off + 4);
4193 outrel.r_info = ELF32_R_INFO (indx,
4194 R_386_TLS_DTPOFF32);
4195 outrel.r_offset += 4;
4196 elf_append_rel (output_bfd, sreloc, &outrel);
4199 else if (tls_type == GOT_TLS_IE_BOTH)
4201 bfd_put_32 (output_bfd,
4203 ? relocation - _bfd_x86_elf_dtpoff_base (info)
4205 htab->elf.sgot->contents + off + 4);
4206 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4207 outrel.r_offset += 4;
4208 elf_append_rel (output_bfd, sreloc, &outrel);
4215 local_got_offsets[r_symndx] |= 1;
4218 if (off >= (bfd_vma) -2
4219 && ! GOT_TLS_GDESC_P (tls_type))
4221 if (r_type == R_386_TLS_GOTDESC
4222 || r_type == R_386_TLS_DESC_CALL)
4224 relocation = htab->sgotplt_jump_table_size + offplt;
4225 unresolved_reloc = FALSE;
4227 else if (r_type == ELF32_R_TYPE (rel->r_info))
4229 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4230 + htab->elf.sgotplt->output_offset;
4231 relocation = htab->elf.sgot->output_section->vma
4232 + htab->elf.sgot->output_offset + off - g_o_t;
4233 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4234 && tls_type == GOT_TLS_IE_BOTH)
4236 if (r_type == R_386_TLS_IE)
4237 relocation += g_o_t;
4238 unresolved_reloc = FALSE;
4240 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4242 unsigned int val, type;
4245 /* GD->IE transition. */
4246 type = *(contents + rel->r_offset - 2);
4247 val = *(contents + rel->r_offset - 1);
4251 leal foo@tlsgd(,%ebx,1), %eax
4252 call ___tls_get_addr@PLT
4255 subl $foo@gottpoff(%ebx), %eax. */
4257 roff = rel->r_offset - 3;
4262 leal foo@tlsgd(%ebx), %eax
4263 call ___tls_get_addr@PLT
4266 leal foo@tlsgd(%reg), %eax
4267 call *___tls_get_addr@GOT(%reg)
4268 which may be converted to
4269 addr32 call ___tls_get_addr
4272 subl $foo@gottpoff(%reg), %eax. */
4273 roff = rel->r_offset - 2;
4275 memcpy (contents + roff,
4276 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4277 contents[roff + 7] = 0x80 | (val & 7);
4278 /* If foo is used only with foo@gotntpoff(%reg) and
4279 foo@indntpoff, but not with foo@gottpoff(%reg), change
4280 subl $foo@gottpoff(%reg), %eax
4282 addl $foo@gotntpoff(%reg), %eax. */
4283 if (tls_type == GOT_TLS_IE_POS)
4284 contents[roff + 6] = 0x03;
4285 bfd_put_32 (output_bfd,
4286 htab->elf.sgot->output_section->vma
4287 + htab->elf.sgot->output_offset + off
4288 - htab->elf.sgotplt->output_section->vma
4289 - htab->elf.sgotplt->output_offset,
4290 contents + roff + 8);
4291 /* Skip R_386_PLT32 and R_386_GOT32X. */
4296 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4298 /* GDesc -> IE transition.
4299 It's originally something like:
4300 leal x@tlsdesc(%ebx), %eax
4303 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4305 movl x@gottpoff(%ebx), %eax # before negl %eax
4307 Registers other than %eax may be set up here. */
4311 /* First, make sure it's a leal adding ebx to a 32-bit
4312 offset into any register, although it's probably
4313 almost always going to be eax. */
4314 roff = rel->r_offset;
4316 /* Now modify the instruction as appropriate. */
4317 /* To turn a leal into a movl in the form we use it, it
4318 suffices to change the first byte from 0x8d to 0x8b.
4319 aoliva FIXME: should we decide to keep the leal, all
4320 we have to do is remove the statement below, and
4321 adjust the relaxation of R_386_TLS_DESC_CALL. */
4322 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4324 if (tls_type == GOT_TLS_IE_BOTH)
4327 bfd_put_32 (output_bfd,
4328 htab->elf.sgot->output_section->vma
4329 + htab->elf.sgot->output_offset + off
4330 - htab->elf.sgotplt->output_section->vma
4331 - htab->elf.sgotplt->output_offset,
4335 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4337 /* GDesc -> IE transition.
4345 depending on how we transformed the TLS_GOTDESC above.
4350 roff = rel->r_offset;
4352 /* Now modify the instruction as appropriate. */
4353 if (tls_type != GOT_TLS_IE_NEG)
4356 bfd_put_8 (output_bfd, 0x66, contents + roff);
4357 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4362 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4363 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4373 if (! elf_i386_tls_transition (info, input_bfd,
4374 input_section, contents,
4375 symtab_hdr, sym_hashes,
4376 &r_type, GOT_UNKNOWN, rel,
4377 relend, h, r_symndx, TRUE))
4380 if (r_type != R_386_TLS_LDM)
4382 /* LD->LE transition. Change
4383 leal foo@tlsldm(%ebx) %eax
4384 call ___tls_get_addr@PLT
4388 leal 0(%esi,1), %esi
4390 leal foo@tlsldm(%reg) %eax
4391 call *___tls_get_addr@GOT(%reg)
4392 which may be converted to
4393 addr32 call ___tls_get_addr
4396 leal 0(%esi), %esi */
4397 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4398 if (*(contents + rel->r_offset + 4) == 0xff
4399 || *(contents + rel->r_offset + 4) == 0x67)
4400 memcpy (contents + rel->r_offset - 2,
4401 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
4403 memcpy (contents + rel->r_offset - 2,
4404 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4405 /* Skip R_386_PC32/R_386_PLT32. */
4411 if (htab->elf.sgot == NULL)
4414 off = htab->tls_ld_or_ldm_got.offset;
4419 Elf_Internal_Rela outrel;
4421 if (htab->elf.srelgot == NULL)
4424 outrel.r_offset = (htab->elf.sgot->output_section->vma
4425 + htab->elf.sgot->output_offset + off);
4427 bfd_put_32 (output_bfd, 0,
4428 htab->elf.sgot->contents + off);
4429 bfd_put_32 (output_bfd, 0,
4430 htab->elf.sgot->contents + off + 4);
4431 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4432 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4433 htab->tls_ld_or_ldm_got.offset |= 1;
4435 relocation = htab->elf.sgot->output_section->vma
4436 + htab->elf.sgot->output_offset + off
4437 - htab->elf.sgotplt->output_section->vma
4438 - htab->elf.sgotplt->output_offset;
4439 unresolved_reloc = FALSE;
4442 case R_386_TLS_LDO_32:
4443 if (!bfd_link_executable (info)
4444 || (input_section->flags & SEC_CODE) == 0)
4445 relocation -= _bfd_x86_elf_dtpoff_base (info);
4447 /* When converting LDO to LE, we must negate. */
4448 relocation = -elf_i386_tpoff (info, relocation);
4451 case R_386_TLS_LE_32:
4453 if (!bfd_link_executable (info))
4455 Elf_Internal_Rela outrel;
4458 outrel.r_offset = rel->r_offset
4459 + input_section->output_section->vma
4460 + input_section->output_offset;
4461 if (h != NULL && h->dynindx != -1)
4465 if (r_type == R_386_TLS_LE_32)
4466 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4468 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4469 sreloc = elf_section_data (input_section)->sreloc;
4472 elf_append_rel (output_bfd, sreloc, &outrel);
4475 else if (r_type == R_386_TLS_LE_32)
4476 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
4478 relocation -= _bfd_x86_elf_dtpoff_base (info);
4480 else if (r_type == R_386_TLS_LE_32)
4481 relocation = elf_i386_tpoff (info, relocation);
4483 relocation = -elf_i386_tpoff (info, relocation);
4490 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4491 because such sections are not SEC_ALLOC and thus ld.so will
4492 not process them. */
4493 if (unresolved_reloc
4494 && !((input_section->flags & SEC_DEBUGGING) != 0
4496 && _bfd_elf_section_offset (output_bfd, info, input_section,
4497 rel->r_offset) != (bfd_vma) -1)
4500 /* xgettext:c-format */
4501 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
4506 h->root.root.string);
4511 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4512 contents, rel->r_offset,
4515 check_relocation_error:
4516 if (r != bfd_reloc_ok)
4521 name = h->root.root.string;
4524 name = bfd_elf_string_from_elf_section (input_bfd,
4525 symtab_hdr->sh_link,
4530 name = bfd_section_name (input_bfd, sec);
4533 if (r == bfd_reloc_overflow)
4534 (*info->callbacks->reloc_overflow)
4535 (info, (h ? &h->root : NULL), name, howto->name,
4536 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
4540 /* xgettext:c-format */
4541 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
4542 input_bfd, input_section,
4543 rel->r_offset, name, (int) r);
4554 Elf_Internal_Shdr *rel_hdr;
4555 size_t deleted = rel - wrel;
4557 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
4558 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4559 if (rel_hdr->sh_size == 0)
4561 /* It is too late to remove an empty reloc section. Leave
4563 ??? What is wrong with an empty section??? */
4564 rel_hdr->sh_size = rel_hdr->sh_entsize;
4567 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
4568 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
4569 input_section->reloc_count -= deleted;
4575 /* Finish up dynamic symbol handling. We set the contents of various
4576 dynamic sections here. */
4579 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4580 struct bfd_link_info *info,
4581 struct elf_link_hash_entry *h,
4582 Elf_Internal_Sym *sym)
4584 struct elf_x86_link_hash_table *htab;
4585 unsigned plt_entry_size;
4586 const struct elf_i386_backend_data *abed;
4587 struct elf_x86_link_hash_entry *eh;
4588 bfd_boolean local_undefweak;
4589 bfd_boolean use_plt_second;
4591 htab = elf_x86_hash_table (info, I386_ELF_DATA);
4595 abed = get_elf_i386_backend_data (output_bfd);
4596 plt_entry_size = htab->plt.plt_entry_size;
4598 /* Use the second PLT section only if there is .plt section. */
4599 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
4601 eh = (struct elf_x86_link_hash_entry *) h;
4602 if (eh->no_finish_dynamic_symbol)
4605 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
4606 resolved undefined weak symbols in executable so that their
4607 references have value 0 at run-time. */
4608 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, I386_ELF_DATA,
4612 if (h->plt.offset != (bfd_vma) -1)
4614 bfd_vma plt_index, plt_offset;
4616 Elf_Internal_Rela rel;
4618 asection *plt, *resolved_plt, *gotplt, *relplt;
4620 /* When building a static executable, use .iplt, .igot.plt and
4621 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4622 if (htab->elf.splt != NULL)
4624 plt = htab->elf.splt;
4625 gotplt = htab->elf.sgotplt;
4626 relplt = htab->elf.srelplt;
4630 plt = htab->elf.iplt;
4631 gotplt = htab->elf.igotplt;
4632 relplt = htab->elf.irelplt;
4635 /* This symbol has an entry in the procedure linkage table. Set
4638 if ((h->dynindx == -1
4640 && !((h->forced_local || bfd_link_executable (info))
4642 && h->type == STT_GNU_IFUNC))
4648 /* Get the index in the procedure linkage table which
4649 corresponds to this symbol. This is the index of this symbol
4650 in all the symbols for which we are making plt entries. The
4651 first entry in the procedure linkage table is reserved.
4653 Get the offset into the .got table of the entry that
4654 corresponds to this function. Each .got entry is 4 bytes.
4655 The first three are reserved.
4657 For static executables, we don't reserve anything. */
4659 if (plt == htab->elf.splt)
4661 got_offset = (h->plt.offset / plt_entry_size
4662 - htab->plt.has_plt0);
4663 got_offset = (got_offset + 3) * 4;
4667 got_offset = h->plt.offset / plt_entry_size;
4668 got_offset = got_offset * 4;
4671 /* Fill in the entry in the procedure linkage table and update
4673 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
4678 const bfd_byte *plt_entry;
4679 if (bfd_link_pic (info))
4680 plt_entry = htab->non_lazy_plt->pic_plt_entry;
4682 plt_entry = htab->non_lazy_plt->plt_entry;
4683 memcpy (htab->plt_second->contents + eh->plt_second.offset,
4684 plt_entry, htab->non_lazy_plt->plt_entry_size);
4686 resolved_plt = htab->plt_second;
4687 plt_offset = eh->plt_second.offset;
4692 plt_offset = h->plt.offset;
4695 if (! bfd_link_pic (info))
4697 bfd_put_32 (output_bfd,
4698 (gotplt->output_section->vma
4699 + gotplt->output_offset
4701 resolved_plt->contents + plt_offset
4702 + htab->plt.plt_got_offset);
4704 if (abed->os == is_vxworks)
4706 int s, k, reloc_index;
4708 /* Create the R_386_32 relocation referencing the GOT
4709 for this PLT entry. */
4711 /* S: Current slot number (zero-based). */
4712 s = ((h->plt.offset - htab->plt.plt_entry_size)
4713 / htab->plt.plt_entry_size);
4714 /* K: Number of relocations for PLTResolve. */
4715 if (bfd_link_pic (info))
4716 k = PLTRESOLVE_RELOCS_SHLIB;
4718 k = PLTRESOLVE_RELOCS;
4719 /* Skip the PLTresolve relocations, and the relocations for
4720 the other PLT slots. */
4721 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4722 loc = (htab->srelplt2->contents + reloc_index
4723 * sizeof (Elf32_External_Rel));
4725 rel.r_offset = (plt->output_section->vma
4726 + plt->output_offset
4727 + h->plt.offset + 2),
4728 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4729 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4731 /* Create the R_386_32 relocation referencing the beginning of
4732 the PLT for this GOT entry. */
4733 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4734 + htab->elf.sgotplt->output_offset
4736 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4737 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4738 loc + sizeof (Elf32_External_Rel));
4743 bfd_put_32 (output_bfd, got_offset,
4744 resolved_plt->contents + plt_offset
4745 + htab->plt.plt_got_offset);
4748 /* Fill in the entry in the global offset table. Leave the entry
4749 as zero for undefined weak symbol in PIE. No PLT relocation
4750 against undefined weak symbol in PIE. */
4751 if (!local_undefweak)
4753 if (htab->plt.has_plt0)
4754 bfd_put_32 (output_bfd,
4755 (plt->output_section->vma
4756 + plt->output_offset
4758 + htab->lazy_plt->plt_lazy_offset),
4759 gotplt->contents + got_offset);
4761 /* Fill in the entry in the .rel.plt section. */
4762 rel.r_offset = (gotplt->output_section->vma
4763 + gotplt->output_offset
4765 if (h->dynindx == -1
4766 || ((bfd_link_executable (info)
4767 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4769 && h->type == STT_GNU_IFUNC))
4771 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4772 h->root.root.string,
4773 h->root.u.def.section->owner);
4775 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4776 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4777 in the .got.plt section. */
4778 bfd_put_32 (output_bfd,
4779 (h->root.u.def.value
4780 + h->root.u.def.section->output_section->vma
4781 + h->root.u.def.section->output_offset),
4782 gotplt->contents + got_offset);
4783 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4784 /* R_386_IRELATIVE comes last. */
4785 plt_index = htab->next_irelative_index--;
4789 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4790 plt_index = htab->next_jump_slot_index++;
4793 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4794 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4796 /* Don't fill the second and third slots in PLT entry for
4797 static executables nor without PLT0. */
4798 if (plt == htab->elf.splt && htab->plt.has_plt0)
4800 bfd_put_32 (output_bfd,
4801 plt_index * sizeof (Elf32_External_Rel),
4802 plt->contents + h->plt.offset
4803 + htab->lazy_plt->plt_reloc_offset);
4804 bfd_put_32 (output_bfd,
4806 + htab->lazy_plt->plt_plt_offset + 4),
4807 (plt->contents + h->plt.offset
4808 + htab->lazy_plt->plt_plt_offset));
4812 else if (eh->plt_got.offset != (bfd_vma) -1)
4814 bfd_vma got_offset, plt_offset;
4815 asection *plt, *got, *gotplt;
4816 const bfd_byte *got_plt_entry;
4818 /* Set the entry in the GOT procedure linkage table. */
4819 plt = htab->plt_got;
4820 got = htab->elf.sgot;
4821 gotplt = htab->elf.sgotplt;
4822 got_offset = h->got.offset;
4824 if (got_offset == (bfd_vma) -1
4830 /* Fill in the entry in the GOT procedure linkage table. */
4831 if (! bfd_link_pic (info))
4833 got_plt_entry = htab->non_lazy_plt->plt_entry;
4834 got_offset += got->output_section->vma + got->output_offset;
4838 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
4839 got_offset += (got->output_section->vma
4840 + got->output_offset
4841 - gotplt->output_section->vma
4842 - gotplt->output_offset);
4845 plt_offset = eh->plt_got.offset;
4846 memcpy (plt->contents + plt_offset, got_plt_entry,
4847 htab->non_lazy_plt->plt_entry_size);
4848 bfd_put_32 (output_bfd, got_offset,
4849 (plt->contents + plt_offset
4850 + htab->non_lazy_plt->plt_got_offset));
4853 if (!local_undefweak
4855 && (h->plt.offset != (bfd_vma) -1
4856 || eh->plt_got.offset != (bfd_vma) -1))
4858 /* Mark the symbol as undefined, rather than as defined in
4859 the .plt section. Leave the value if there were any
4860 relocations where pointer equality matters (this is a clue
4861 for the dynamic linker, to make function pointer
4862 comparisons work between an application and shared
4863 library), otherwise set it to zero. If a function is only
4864 called from a binary, there is no need to slow down
4865 shared libraries because of that. */
4866 sym->st_shndx = SHN_UNDEF;
4867 if (!h->pointer_equality_needed)
4871 /* Don't generate dynamic GOT relocation against undefined weak
4872 symbol in executable. */
4873 if (h->got.offset != (bfd_vma) -1
4874 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
4875 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
4876 && !local_undefweak)
4878 Elf_Internal_Rela rel;
4879 asection *relgot = htab->elf.srelgot;
4881 /* This symbol has an entry in the global offset table. Set it
4884 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4887 rel.r_offset = (htab->elf.sgot->output_section->vma
4888 + htab->elf.sgot->output_offset
4889 + (h->got.offset & ~(bfd_vma) 1));
4891 /* If this is a static link, or it is a -Bsymbolic link and the
4892 symbol is defined locally or was forced to be local because
4893 of a version file, we just want to emit a RELATIVE reloc.
4894 The entry in the global offset table will already have been
4895 initialized in the relocate_section function. */
4897 && h->type == STT_GNU_IFUNC)
4899 if (h->plt.offset == (bfd_vma) -1)
4901 /* STT_GNU_IFUNC is referenced without PLT. */
4902 if (htab->elf.splt == NULL)
4904 /* use .rel[a].iplt section to store .got relocations
4905 in static executable. */
4906 relgot = htab->elf.irelplt;
4908 if (SYMBOL_REFERENCES_LOCAL (info, h))
4910 info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"),
4911 h->root.root.string,
4912 h->root.u.def.section->owner);
4914 bfd_put_32 (output_bfd,
4915 (h->root.u.def.value
4916 + h->root.u.def.section->output_section->vma
4917 + h->root.u.def.section->output_offset),
4918 htab->elf.sgot->contents + h->got.offset);
4919 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4924 else if (bfd_link_pic (info))
4926 /* Generate R_386_GLOB_DAT. */
4934 if (!h->pointer_equality_needed)
4937 /* For non-shared object, we can't use .got.plt, which
4938 contains the real function addres if we need pointer
4939 equality. We load the GOT entry with the PLT entry. */
4940 if (htab->plt_second != NULL)
4942 plt = htab->plt_second;
4943 plt_offset = eh->plt_second.offset;
4947 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4948 plt_offset = h->plt.offset;
4950 bfd_put_32 (output_bfd,
4951 (plt->output_section->vma
4952 + plt->output_offset + plt_offset),
4953 htab->elf.sgot->contents + h->got.offset);
4957 else if (bfd_link_pic (info)
4958 && SYMBOL_REFERENCES_LOCAL (info, h))
4960 BFD_ASSERT((h->got.offset & 1) != 0);
4961 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4965 BFD_ASSERT((h->got.offset & 1) == 0);
4967 bfd_put_32 (output_bfd, (bfd_vma) 0,
4968 htab->elf.sgot->contents + h->got.offset);
4969 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4972 elf_append_rel (output_bfd, relgot, &rel);
4977 Elf_Internal_Rela rel;
4980 /* This symbol needs a copy reloc. Set it up. */
4982 if (h->dynindx == -1
4983 || (h->root.type != bfd_link_hash_defined
4984 && h->root.type != bfd_link_hash_defweak)
4985 || htab->elf.srelbss == NULL
4986 || htab->elf.sreldynrelro == NULL)
4989 rel.r_offset = (h->root.u.def.value
4990 + h->root.u.def.section->output_section->vma
4991 + h->root.u.def.section->output_offset);
4992 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4993 if (h->root.u.def.section == htab->elf.sdynrelro)
4994 s = htab->elf.sreldynrelro;
4996 s = htab->elf.srelbss;
4997 elf_append_rel (output_bfd, s, &rel);
5003 /* Finish up local dynamic symbol handling. We set the contents of
5004 various dynamic sections here. */
5007 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5009 struct elf_link_hash_entry *h
5010 = (struct elf_link_hash_entry *) *slot;
5011 struct bfd_link_info *info
5012 = (struct bfd_link_info *) inf;
5014 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5018 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5019 here since undefined weak symbol may not be dynamic and may not be
5020 called for elf_i386_finish_dynamic_symbol. */
5023 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5026 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5027 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5029 if (h->root.type != bfd_link_hash_undefweak
5030 || h->dynindx != -1)
5033 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5037 /* Used to decide how to sort relocs in an optimal manner for the
5038 dynamic linker, before writing them out. */
5040 static enum elf_reloc_type_class
5041 elf_i386_reloc_type_class (const struct bfd_link_info *info,
5042 const asection *rel_sec ATTRIBUTE_UNUSED,
5043 const Elf_Internal_Rela *rela)
5045 bfd *abfd = info->output_bfd;
5046 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5047 struct elf_link_hash_table *htab = elf_hash_table (info);
5049 if (htab->dynsym != NULL
5050 && htab->dynsym->contents != NULL)
5052 /* Check relocation against STT_GNU_IFUNC symbol if there are
5054 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5055 if (r_symndx != STN_UNDEF)
5057 Elf_Internal_Sym sym;
5058 if (!bed->s->swap_symbol_in (abfd,
5059 (htab->dynsym->contents
5060 + r_symndx * sizeof (Elf32_External_Sym)),
5064 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5065 return reloc_class_ifunc;
5069 switch (ELF32_R_TYPE (rela->r_info))
5071 case R_386_IRELATIVE:
5072 return reloc_class_ifunc;
5073 case R_386_RELATIVE:
5074 return reloc_class_relative;
5075 case R_386_JUMP_SLOT:
5076 return reloc_class_plt;
5078 return reloc_class_copy;
5080 return reloc_class_normal;
5084 /* Finish up the dynamic sections. */
5087 elf_i386_finish_dynamic_sections (bfd *output_bfd,
5088 struct bfd_link_info *info)
5090 struct elf_x86_link_hash_table *htab;
5093 const struct elf_i386_backend_data *abed;
5095 htab = elf_x86_hash_table (info, I386_ELF_DATA);
5099 dynobj = htab->elf.dynobj;
5100 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5101 abed = get_elf_i386_backend_data (output_bfd);
5103 if (htab->elf.dynamic_sections_created)
5105 Elf32_External_Dyn *dyncon, *dynconend;
5107 if (sdyn == NULL || htab->elf.sgot == NULL)
5110 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5111 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5112 for (; dyncon < dynconend; dyncon++)
5114 Elf_Internal_Dyn dyn;
5117 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5122 if (abed->os == is_vxworks
5123 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5128 s = htab->elf.sgotplt;
5129 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5133 s = htab->elf.srelplt;
5134 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5138 s = htab->elf.srelplt;
5139 dyn.d_un.d_val = s->size;
5143 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5146 if (htab->elf.splt && htab->elf.splt->size > 0)
5148 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5149 really seem like the right value. */
5150 elf_section_data (htab->elf.splt->output_section)
5151 ->this_hdr.sh_entsize = 4;
5153 if (htab->plt.has_plt0)
5155 /* Fill in the special first entry in the procedure linkage
5157 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
5158 htab->lazy_plt->plt0_entry_size);
5159 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
5160 abed->plt0_pad_byte,
5161 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
5162 if (!bfd_link_pic (info))
5164 bfd_put_32 (output_bfd,
5165 (htab->elf.sgotplt->output_section->vma
5166 + htab->elf.sgotplt->output_offset
5168 htab->elf.splt->contents
5169 + htab->lazy_plt->plt0_got1_offset);
5170 bfd_put_32 (output_bfd,
5171 (htab->elf.sgotplt->output_section->vma
5172 + htab->elf.sgotplt->output_offset
5174 htab->elf.splt->contents
5175 + htab->lazy_plt->plt0_got2_offset);
5177 if (abed->os == is_vxworks)
5179 Elf_Internal_Rela rel;
5180 int num_plts = (htab->elf.splt->size
5181 / htab->plt.plt_entry_size) - 1;
5183 asection *srelplt2 = htab->srelplt2;
5185 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5186 + 4. On IA32 we use REL relocations so the
5187 addend goes in the PLT directly. */
5188 rel.r_offset = (htab->elf.splt->output_section->vma
5189 + htab->elf.splt->output_offset
5190 + htab->lazy_plt->plt0_got1_offset);
5191 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5193 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5194 srelplt2->contents);
5195 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5197 rel.r_offset = (htab->elf.splt->output_section->vma
5198 + htab->elf.splt->output_offset
5199 + htab->lazy_plt->plt0_got2_offset);
5200 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5202 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5203 srelplt2->contents +
5204 sizeof (Elf32_External_Rel));
5205 /* Correct the .rel.plt.unloaded relocations. */
5206 p = srelplt2->contents;
5207 if (bfd_link_pic (info))
5208 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5210 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5212 for (; num_plts; num_plts--)
5214 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5215 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
5217 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5218 p += sizeof (Elf32_External_Rel);
5220 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5221 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
5223 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5224 p += sizeof (Elf32_External_Rel);
5231 if (htab->plt_got != NULL && htab->plt_got->size > 0)
5232 elf_section_data (htab->plt_got->output_section)
5233 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
5235 if (htab->plt_second != NULL && htab->plt_second->size > 0)
5236 elf_section_data (htab->plt_second->output_section)
5237 ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size;
5240 /* Fill in the first three entries in the global offset table. */
5241 if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0)
5243 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5246 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5250 bfd_put_32 (output_bfd,
5252 : sdyn->output_section->vma + sdyn->output_offset),
5253 htab->elf.sgotplt->contents);
5254 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5255 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5257 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5260 /* Adjust .eh_frame for .plt section. */
5261 if (htab->plt_eh_frame != NULL
5262 && htab->plt_eh_frame->contents != NULL)
5264 if (htab->elf.splt != NULL
5265 && htab->elf.splt->size != 0
5266 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5267 && htab->elf.splt->output_section != NULL
5268 && htab->plt_eh_frame->output_section != NULL)
5270 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5271 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5272 + htab->plt_eh_frame->output_offset
5273 + PLT_FDE_START_OFFSET;
5274 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5275 htab->plt_eh_frame->contents
5276 + PLT_FDE_START_OFFSET);
5278 if (htab->plt_eh_frame->sec_info_type
5279 == SEC_INFO_TYPE_EH_FRAME)
5281 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5283 htab->plt_eh_frame->contents))
5288 /* Adjust .eh_frame for .plt.got section. */
5289 if (htab->plt_got_eh_frame != NULL
5290 && htab->plt_got_eh_frame->contents != NULL)
5292 if (htab->plt_got != NULL
5293 && htab->plt_got->size != 0
5294 && (htab->plt_got->flags & SEC_EXCLUDE) == 0
5295 && htab->plt_got->output_section != NULL
5296 && htab->plt_got_eh_frame->output_section != NULL)
5298 bfd_vma plt_start = htab->plt_got->output_section->vma;
5299 bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma
5300 + htab->plt_got_eh_frame->output_offset
5301 + PLT_FDE_START_OFFSET;
5302 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5303 htab->plt_got_eh_frame->contents
5304 + PLT_FDE_START_OFFSET);
5306 if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME)
5308 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5309 htab->plt_got_eh_frame,
5310 htab->plt_got_eh_frame->contents))
5315 /* Adjust .eh_frame for the second PLT section. */
5316 if (htab->plt_second_eh_frame != NULL
5317 && htab->plt_second_eh_frame->contents != NULL)
5319 if (htab->plt_second != NULL
5320 && htab->plt_second->size != 0
5321 && (htab->plt_second->flags & SEC_EXCLUDE) == 0
5322 && htab->plt_second->output_section != NULL
5323 && htab->plt_second_eh_frame->output_section != NULL)
5325 bfd_vma plt_start = htab->plt_second->output_section->vma;
5326 bfd_vma eh_frame_start
5327 = (htab->plt_second_eh_frame->output_section->vma
5328 + htab->plt_second_eh_frame->output_offset
5329 + PLT_FDE_START_OFFSET);
5330 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5331 htab->plt_second_eh_frame->contents
5332 + PLT_FDE_START_OFFSET);
5334 if (htab->plt_second_eh_frame->sec_info_type
5335 == SEC_INFO_TYPE_EH_FRAME)
5337 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5338 htab->plt_second_eh_frame,
5339 htab->plt_second_eh_frame->contents))
5344 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5345 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5347 /* Fill PLT entries for undefined weak symbols in PIE. */
5348 if (bfd_link_pie (info))
5349 bfd_hash_traverse (&info->hash->table,
5350 elf_i386_pie_finish_undefweak_symbol,
5356 /* Fill PLT/GOT entries and allocate dynamic relocations for local
5357 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5358 It has to be done before elf_link_sort_relocs is called so that
5359 dynamic relocations are properly sorted. */
5362 elf_i386_output_arch_local_syms
5363 (bfd *output_bfd ATTRIBUTE_UNUSED,
5364 struct bfd_link_info *info,
5365 void *flaginfo ATTRIBUTE_UNUSED,
5366 int (*func) (void *, const char *,
5369 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
5371 struct elf_x86_link_hash_table *htab
5372 = elf_x86_hash_table (info, I386_ELF_DATA);
5376 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5377 htab_traverse (htab->loc_hash_table,
5378 elf_i386_finish_local_dynamic_symbol,
5384 /* Forward declaration. */
5385 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
5387 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
5388 dynamic relocations. */
5391 elf_i386_get_synthetic_symtab (bfd *abfd,
5392 long symcount ATTRIBUTE_UNUSED,
5393 asymbol **syms ATTRIBUTE_UNUSED,
5400 bfd_byte *plt_contents;
5402 const struct elf_x86_lazy_plt_layout *lazy_plt;
5403 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
5404 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
5405 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
5408 enum elf_x86_plt_type plt_type;
5409 struct elf_x86_plt plts[] =
5411 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
5412 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
5413 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
5414 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
5419 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
5422 if (dynsymcount <= 0)
5425 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
5429 non_lazy_plt = NULL;
5430 /* Silence GCC 6. */
5432 non_lazy_ibt_plt = NULL;
5433 lazy_ibt_plt = NULL;
5434 switch (get_elf_i386_backend_data (abfd)->os)
5437 non_lazy_plt = &elf_i386_non_lazy_plt;
5438 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5439 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
5442 lazy_plt = &elf_i386_lazy_plt;
5445 lazy_plt = &elf_i386_nacl_plt;
5452 for (j = 0; plts[j].name != NULL; j++)
5454 plt = bfd_get_section_by_name (abfd, plts[j].name);
5455 if (plt == NULL || plt->size == 0)
5458 /* Get the PLT section contents. */
5459 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5460 if (plt_contents == NULL)
5462 if (!bfd_get_section_contents (abfd, (asection *) plt,
5463 plt_contents, 0, plt->size))
5465 free (plt_contents);
5469 /* Check what kind of PLT it is. */
5470 plt_type = plt_unknown;
5471 if (plts[j].type == plt_unknown
5472 && (plt->size >= (lazy_plt->plt0_entry_size
5473 + lazy_plt->plt_entry_size)))
5475 /* Match lazy PLT first. */
5476 if (memcmp (plt_contents, lazy_plt->plt0_entry,
5477 lazy_plt->plt0_got1_offset) == 0)
5479 /* The fist entry in the lazy IBT PLT is the same as the
5481 if (lazy_ibt_plt != NULL
5482 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
5483 lazy_ibt_plt->plt_entry,
5484 lazy_ibt_plt->plt_got_offset) == 0))
5485 plt_type = plt_lazy | plt_second;
5487 plt_type = plt_lazy;
5489 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
5490 lazy_plt->plt0_got1_offset) == 0)
5492 /* The fist entry in the PIC lazy IBT PLT is the same as
5493 the normal PIC lazy PLT. */
5494 if (lazy_ibt_plt != NULL
5495 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
5496 lazy_ibt_plt->pic_plt_entry,
5497 lazy_ibt_plt->plt_got_offset) == 0))
5498 plt_type = plt_lazy | plt_pic | plt_second;
5500 plt_type = plt_lazy | plt_pic;
5504 if (non_lazy_plt != NULL
5505 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
5506 && plt->size >= non_lazy_plt->plt_entry_size)
5508 /* Match non-lazy PLT. */
5509 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
5510 non_lazy_plt->plt_got_offset) == 0)
5511 plt_type = plt_non_lazy;
5512 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
5513 non_lazy_plt->plt_got_offset) == 0)
5517 if ((non_lazy_ibt_plt != NULL)
5518 && (plt_type == plt_unknown || plt_type == plt_second)
5519 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
5521 if (memcmp (plt_contents,
5522 non_lazy_ibt_plt->plt_entry,
5523 non_lazy_ibt_plt->plt_got_offset) == 0)
5525 /* Match IBT PLT. */
5526 plt_type = plt_second;
5527 non_lazy_plt = non_lazy_ibt_plt;
5529 else if (memcmp (plt_contents,
5530 non_lazy_ibt_plt->pic_plt_entry,
5531 non_lazy_ibt_plt->plt_got_offset) == 0)
5533 /* Match PIC IBT PLT. */
5534 plt_type = plt_second | plt_pic;
5535 non_lazy_plt = non_lazy_ibt_plt;
5539 if (plt_type == plt_unknown)
5541 free (plt_contents);
5546 plts[j].type = plt_type;
5548 if ((plt_type & plt_lazy))
5550 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
5551 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
5552 /* Skip PLT0 in lazy PLT. */
5557 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
5558 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
5562 /* Skip lazy PLT when the second PLT is used. */
5563 if ((plt_type & (plt_lazy | plt_second))
5564 == (plt_lazy | plt_second))
5568 n = plt->size / plts[j].plt_entry_size;
5573 plts[j].contents = plt_contents;
5575 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
5576 if ((plt_type & plt_pic))
5577 got_addr = (bfd_vma) -1;
5580 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
5581 got_addr, plts, dynsyms,
5585 /* Set up i386 GNU properties. Return the first relocatable ELF input
5586 with GNU properties if found. Otherwise, return NULL. */
5589 elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
5591 struct elf_x86_plt_layout_table plt_layout;
5593 plt_layout.normal_target = FALSE;
5594 plt_layout.is_vxworks = FALSE;
5595 switch (get_elf_i386_backend_data (info->output_bfd)->os)
5598 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5599 plt_layout.non_lazy_plt = &elf_i386_non_lazy_plt;
5600 plt_layout.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
5601 plt_layout.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
5602 plt_layout.normal_target = TRUE;
5605 plt_layout.lazy_plt = &elf_i386_lazy_plt;
5606 plt_layout.non_lazy_plt = NULL;
5607 plt_layout.lazy_ibt_plt = NULL;
5608 plt_layout.non_lazy_ibt_plt = NULL;
5609 plt_layout.is_vxworks = TRUE;
5612 plt_layout.lazy_plt = &elf_i386_nacl_plt;
5613 plt_layout.non_lazy_plt = NULL;
5614 plt_layout.lazy_ibt_plt = NULL;
5615 plt_layout.non_lazy_ibt_plt = NULL;
5619 return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout);
5622 #define TARGET_LITTLE_SYM i386_elf32_vec
5623 #define TARGET_LITTLE_NAME "elf32-i386"
5624 #define ELF_ARCH bfd_arch_i386
5625 #define ELF_TARGET_ID I386_ELF_DATA
5626 #define ELF_MACHINE_CODE EM_386
5627 #define ELF_MAXPAGESIZE 0x1000
5629 #define elf_backend_can_gc_sections 1
5630 #define elf_backend_can_refcount 1
5631 #define elf_backend_want_got_plt 1
5632 #define elf_backend_plt_readonly 1
5633 #define elf_backend_want_plt_sym 0
5634 #define elf_backend_got_header_size 12
5635 #define elf_backend_plt_alignment 4
5636 #define elf_backend_dtrel_excludes_plt 1
5637 #define elf_backend_extern_protected_data 1
5638 #define elf_backend_caches_rawsize 1
5639 #define elf_backend_want_dynrelro 1
5641 /* Support RELA for objdump of prelink objects. */
5642 #define elf_info_to_howto elf_i386_info_to_howto_rel
5643 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5645 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5646 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5647 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5648 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5650 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5651 #define elf_backend_check_relocs elf_i386_check_relocs
5652 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
5653 #define elf_backend_fake_sections elf_i386_fake_sections
5654 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5655 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5656 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
5657 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5658 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5659 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5660 #define elf_backend_relocate_section elf_i386_relocate_section
5661 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5662 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
5664 #include "elf32-target.h"
5666 /* FreeBSD support. */
5668 #undef TARGET_LITTLE_SYM
5669 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5670 #undef TARGET_LITTLE_NAME
5671 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5673 #define ELF_OSABI ELFOSABI_FREEBSD
5675 /* The kernel recognizes executables as valid only if they carry a
5676 "FreeBSD" label in the ELF header. So we put this label on all
5677 executables and (for simplicity) also all other object files. */
5680 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5682 _bfd_elf_post_process_headers (abfd, info);
5684 #ifdef OLD_FREEBSD_ABI_LABEL
5686 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5687 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5688 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5693 #undef elf_backend_post_process_headers
5694 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5696 #define elf32_bed elf32_i386_fbsd_bed
5698 #undef elf_backend_add_symbol_hook
5700 #include "elf32-target.h"
5704 #undef TARGET_LITTLE_SYM
5705 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5706 #undef TARGET_LITTLE_NAME
5707 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5709 #undef elf_backend_post_process_headers
5711 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5712 objects won't be recognized. */
5716 #define elf32_bed elf32_i386_sol2_bed
5718 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5720 #undef elf_backend_static_tls_alignment
5721 #define elf_backend_static_tls_alignment 8
5723 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5725 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5727 #undef elf_backend_want_plt_sym
5728 #define elf_backend_want_plt_sym 1
5730 #undef elf_backend_strtab_flags
5731 #define elf_backend_strtab_flags SHF_STRINGS
5733 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
5734 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
5735 FALSE otherwise. ISECTION is the best guess matching section from the
5736 input bfd IBFD, but it might be NULL. */
5739 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
5740 bfd *obfd ATTRIBUTE_UNUSED,
5741 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
5742 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
5744 /* PR 19938: FIXME: Need to add code for setting the sh_info
5745 and sh_link fields of Solaris specific section types. */
5748 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
5749 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
5751 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
5753 The following values should be set:
5756 -----------------------------------------------------------------------------
5757 SHT_SUNW_ancillary The section header index of 0
5758 [0x6fffffee] the associated string table.
5760 SHT_SUNW_capinfo The section header index of For a dynamic object, the
5761 [0x6ffffff0] the associated symbol table. section header index of
5763 SHT_SUNW_capchain table,
5766 SHT_SUNW_symsort The section header index of 0
5767 [0x6ffffff1] the associated symbol table.
5769 SHT_SUNW_tlssort The section header index of 0
5770 [0x6ffffff2] the associated symbol table.
5772 SHT_SUNW_LDYNSYM The section header index of One greater than the
5773 [0x6ffffff3] the associated string table. symbol table index of the
5774 This index is the same string last local symbol,
5775 table used by the SHT_DYNSYM STB_LOCAL. Since
5776 section. SHT_SUNW_LDYNSYM only
5777 contains local symbols,
5778 sh_info is equivalent to
5779 the number of symbols in
5782 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
5783 [0x6ffffff5] the section header index of to named strings, the
5784 the associated section header index of
5785 SHT_SUNW_capinfo table, the associated string
5786 otherwise 0. table, otherwise 0.
5788 SHT_SUNW_move The section header index of 0
5789 [0x6ffffffa] the associated symbol table.
5794 SHT_SUNW_syminfo The section header index of The section header index
5795 [0x6ffffffc] the associated symbol table. of the associated
5798 SHT_SUNW_verdef The section header index of The number of version
5799 [0x6ffffffd] the associated string table. definitions within the
5802 SHT_SUNW_verneed The section header index of The number of version
5803 [0x6ffffffe] the associated string table. dependencies within the
5806 SHT_SUNW_versym The section header index of 0
5807 [0x6fffffff] the associated symbol table. */
5810 #undef elf_backend_copy_special_section_fields
5811 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
5813 #include "elf32-target.h"
5815 /* Intel MCU support. */
5818 elf32_iamcu_elf_object_p (bfd *abfd)
5820 /* Set the right machine number for an IAMCU elf32 file. */
5821 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5825 #undef TARGET_LITTLE_SYM
5826 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5827 #undef TARGET_LITTLE_NAME
5828 #define TARGET_LITTLE_NAME "elf32-iamcu"
5830 #define ELF_ARCH bfd_arch_iamcu
5832 #undef ELF_MACHINE_CODE
5833 #define ELF_MACHINE_CODE EM_IAMCU
5838 #define elf32_bed elf32_iamcu_bed
5840 #undef elf_backend_object_p
5841 #define elf_backend_object_p elf32_iamcu_elf_object_p
5843 #undef elf_backend_static_tls_alignment
5845 #undef elf_backend_want_plt_sym
5846 #define elf_backend_want_plt_sym 0
5848 #undef elf_backend_strtab_flags
5849 #undef elf_backend_copy_special_section_fields
5851 #include "elf32-target.h"
5853 /* Restore defaults. */
5855 #define ELF_ARCH bfd_arch_i386
5856 #undef ELF_MACHINE_CODE
5857 #define ELF_MACHINE_CODE EM_386
5859 /* Native Client support. */
5861 #undef TARGET_LITTLE_SYM
5862 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5863 #undef TARGET_LITTLE_NAME
5864 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5866 #define elf32_bed elf32_i386_nacl_bed
5868 #undef ELF_MAXPAGESIZE
5869 #define ELF_MAXPAGESIZE 0x10000
5871 /* Restore defaults. */
5873 #undef elf_backend_want_plt_sym
5874 #define elf_backend_want_plt_sym 0
5875 #undef elf_backend_post_process_headers
5876 #undef elf_backend_static_tls_alignment
5878 /* NaCl uses substantially different PLT entries for the same effects. */
5880 #undef elf_backend_plt_alignment
5881 #define elf_backend_plt_alignment 5
5882 #define NACL_PLT_ENTRY_SIZE 64
5883 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5885 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5887 0xff, 0x35, /* pushl contents of address */
5888 0, 0, 0, 0, /* replaced with address of .got + 4. */
5889 0x8b, 0x0d, /* movl contents of address, %ecx */
5890 0, 0, 0, 0, /* replaced with address of .got + 8. */
5891 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5892 0xff, 0xe1 /* jmp *%ecx */
5895 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5897 0x8b, 0x0d, /* movl contents of address, %ecx */
5898 0, 0, 0, 0, /* replaced with GOT slot address. */
5899 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5900 0xff, 0xe1, /* jmp *%ecx */
5902 /* Pad to the next 32-byte boundary with nop instructions. */
5904 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5905 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5907 /* Lazy GOT entries point here (32-byte aligned). */
5908 0x68, /* pushl immediate */
5909 0, 0, 0, 0, /* replaced with reloc offset. */
5910 0xe9, /* jmp relative */
5911 0, 0, 0, 0, /* replaced with offset to .plt. */
5913 /* Pad to the next 32-byte boundary with nop instructions. */
5914 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5915 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5919 static const bfd_byte
5920 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5922 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5923 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5924 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5925 0xff, 0xe1, /* jmp *%ecx */
5927 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5928 so pad to that size with nop instructions. */
5929 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5932 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5934 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5935 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5936 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5937 0xff, 0xe1, /* jmp *%ecx */
5939 /* Pad to the next 32-byte boundary with nop instructions. */
5941 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5942 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5944 /* Lazy GOT entries point here (32-byte aligned). */
5945 0x68, /* pushl immediate */
5946 0, 0, 0, 0, /* replaced with offset into relocation table. */
5947 0xe9, /* jmp relative */
5948 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5950 /* Pad to the next 32-byte boundary with nop instructions. */
5951 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5952 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5956 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5958 #if (PLT_CIE_LENGTH != 20 \
5959 || PLT_FDE_LENGTH != 36 \
5960 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5961 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5962 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5964 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5965 0, 0, 0, 0, /* CIE ID */
5966 1, /* CIE version */
5967 'z', 'R', 0, /* Augmentation string */
5968 1, /* Code alignment factor */
5969 0x7c, /* Data alignment factor: -4 */
5970 8, /* Return address column */
5971 1, /* Augmentation size */
5972 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5973 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5974 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5975 DW_CFA_nop, DW_CFA_nop,
5977 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5978 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5979 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5980 0, 0, 0, 0, /* .plt size goes here */
5981 0, /* Augmentation size */
5982 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5983 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5984 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5985 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5986 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5987 13, /* Block length */
5988 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5989 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5990 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5991 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5992 DW_CFA_nop, DW_CFA_nop
5995 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
5997 elf_i386_nacl_plt0_entry, /* plt0_entry */
5998 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5999 elf_i386_nacl_plt_entry, /* plt_entry */
6000 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6001 2, /* plt0_got1_offset */
6002 8, /* plt0_got2_offset */
6003 0, /* plt0_got2_insn_end */
6004 2, /* plt_got_offset */
6005 33, /* plt_reloc_offset */
6006 38, /* plt_plt_offset */
6007 0, /* plt_got_insn_size */
6008 0, /* plt_plt_insn_end */
6009 32, /* plt_lazy_offset */
6010 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6011 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6012 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
6013 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
6016 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6018 0x90, /* plt0_pad_byte: nop insn */
6023 elf32_i386_nacl_elf_object_p (bfd *abfd)
6025 /* Set the right machine number for a NaCl i386 ELF32 file. */
6026 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6030 #undef elf_backend_arch_data
6031 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6033 #undef elf_backend_object_p
6034 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6035 #undef elf_backend_modify_segment_map
6036 #define elf_backend_modify_segment_map nacl_modify_segment_map
6037 #undef elf_backend_modify_program_headers
6038 #define elf_backend_modify_program_headers nacl_modify_program_headers
6039 #undef elf_backend_final_write_processing
6040 #define elf_backend_final_write_processing nacl_final_write_processing
6042 #include "elf32-target.h"
6044 /* Restore defaults. */
6045 #undef elf_backend_object_p
6046 #undef elf_backend_modify_segment_map
6047 #undef elf_backend_modify_program_headers
6048 #undef elf_backend_final_write_processing
6050 /* VxWorks support. */
6052 #undef TARGET_LITTLE_SYM
6053 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6054 #undef TARGET_LITTLE_NAME
6055 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6057 #undef ELF_MAXPAGESIZE
6058 #define ELF_MAXPAGESIZE 0x1000
6059 #undef elf_backend_plt_alignment
6060 #define elf_backend_plt_alignment 4
6062 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6064 0x90, /* plt0_pad_byte */
6068 #undef elf_backend_arch_data
6069 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6071 #undef elf_backend_relocs_compatible
6072 #undef elf_backend_add_symbol_hook
6073 #define elf_backend_add_symbol_hook \
6074 elf_vxworks_add_symbol_hook
6075 #undef elf_backend_link_output_symbol_hook
6076 #define elf_backend_link_output_symbol_hook \
6077 elf_vxworks_link_output_symbol_hook
6078 #undef elf_backend_emit_relocs
6079 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6080 #undef elf_backend_final_write_processing
6081 #define elf_backend_final_write_processing \
6082 elf_vxworks_final_write_processing
6083 #undef elf_backend_static_tls_alignment
6085 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6087 #undef elf_backend_want_plt_sym
6088 #define elf_backend_want_plt_sym 1
6091 #define elf32_bed elf32_i386_vxworks_bed
6093 #include "elf32-target.h"