1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2018 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 #define X86_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32)
187 #define X86_SIZE_TYPE_P(TYPE) ((TYPE) == R_386_SIZE32)
189 #ifdef DEBUG_GEN_RELOC
191 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
196 static reloc_howto_type *
197 elf_i386_reloc_type_lookup (bfd *abfd,
198 bfd_reloc_code_real_type code)
203 TRACE ("BFD_RELOC_NONE");
204 return &elf_howto_table[R_386_NONE];
207 TRACE ("BFD_RELOC_32");
208 return &elf_howto_table[R_386_32];
211 TRACE ("BFD_RELOC_CTOR");
212 return &elf_howto_table[R_386_32];
214 case BFD_RELOC_32_PCREL:
215 TRACE ("BFD_RELOC_PC32");
216 return &elf_howto_table[R_386_PC32];
218 case BFD_RELOC_386_GOT32:
219 TRACE ("BFD_RELOC_386_GOT32");
220 return &elf_howto_table[R_386_GOT32];
222 case BFD_RELOC_386_PLT32:
223 TRACE ("BFD_RELOC_386_PLT32");
224 return &elf_howto_table[R_386_PLT32];
226 case BFD_RELOC_386_COPY:
227 TRACE ("BFD_RELOC_386_COPY");
228 return &elf_howto_table[R_386_COPY];
230 case BFD_RELOC_386_GLOB_DAT:
231 TRACE ("BFD_RELOC_386_GLOB_DAT");
232 return &elf_howto_table[R_386_GLOB_DAT];
234 case BFD_RELOC_386_JUMP_SLOT:
235 TRACE ("BFD_RELOC_386_JUMP_SLOT");
236 return &elf_howto_table[R_386_JUMP_SLOT];
238 case BFD_RELOC_386_RELATIVE:
239 TRACE ("BFD_RELOC_386_RELATIVE");
240 return &elf_howto_table[R_386_RELATIVE];
242 case BFD_RELOC_386_GOTOFF:
243 TRACE ("BFD_RELOC_386_GOTOFF");
244 return &elf_howto_table[R_386_GOTOFF];
246 case BFD_RELOC_386_GOTPC:
247 TRACE ("BFD_RELOC_386_GOTPC");
248 return &elf_howto_table[R_386_GOTPC];
250 /* These relocs are a GNU extension. */
251 case BFD_RELOC_386_TLS_TPOFF:
252 TRACE ("BFD_RELOC_386_TLS_TPOFF");
253 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
255 case BFD_RELOC_386_TLS_IE:
256 TRACE ("BFD_RELOC_386_TLS_IE");
257 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
259 case BFD_RELOC_386_TLS_GOTIE:
260 TRACE ("BFD_RELOC_386_TLS_GOTIE");
261 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
263 case BFD_RELOC_386_TLS_LE:
264 TRACE ("BFD_RELOC_386_TLS_LE");
265 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
267 case BFD_RELOC_386_TLS_GD:
268 TRACE ("BFD_RELOC_386_TLS_GD");
269 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
271 case BFD_RELOC_386_TLS_LDM:
272 TRACE ("BFD_RELOC_386_TLS_LDM");
273 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
276 TRACE ("BFD_RELOC_16");
277 return &elf_howto_table[R_386_16 - R_386_ext_offset];
279 case BFD_RELOC_16_PCREL:
280 TRACE ("BFD_RELOC_16_PCREL");
281 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
284 TRACE ("BFD_RELOC_8");
285 return &elf_howto_table[R_386_8 - R_386_ext_offset];
287 case BFD_RELOC_8_PCREL:
288 TRACE ("BFD_RELOC_8_PCREL");
289 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
291 /* Common with Sun TLS implementation. */
292 case BFD_RELOC_386_TLS_LDO_32:
293 TRACE ("BFD_RELOC_386_TLS_LDO_32");
294 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
296 case BFD_RELOC_386_TLS_IE_32:
297 TRACE ("BFD_RELOC_386_TLS_IE_32");
298 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
300 case BFD_RELOC_386_TLS_LE_32:
301 TRACE ("BFD_RELOC_386_TLS_LE_32");
302 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
304 case BFD_RELOC_386_TLS_DTPMOD32:
305 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
306 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
308 case BFD_RELOC_386_TLS_DTPOFF32:
309 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
310 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
312 case BFD_RELOC_386_TLS_TPOFF32:
313 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
314 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
316 case BFD_RELOC_SIZE32:
317 TRACE ("BFD_RELOC_SIZE32");
318 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
320 case BFD_RELOC_386_TLS_GOTDESC:
321 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
322 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
324 case BFD_RELOC_386_TLS_DESC_CALL:
325 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
326 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
328 case BFD_RELOC_386_TLS_DESC:
329 TRACE ("BFD_RELOC_386_TLS_DESC");
330 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
332 case BFD_RELOC_386_IRELATIVE:
333 TRACE ("BFD_RELOC_386_IRELATIVE");
334 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
336 case BFD_RELOC_386_GOT32X:
337 TRACE ("BFD_RELOC_386_GOT32X");
338 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
340 case BFD_RELOC_VTABLE_INHERIT:
341 TRACE ("BFD_RELOC_VTABLE_INHERIT");
342 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
344 case BFD_RELOC_VTABLE_ENTRY:
345 TRACE ("BFD_RELOC_VTABLE_ENTRY");
346 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
350 /* xgettext:c-format */
351 _bfd_error_handler (_("%pB: unsupported relocation type: %#x"),
353 bfd_set_error (bfd_error_bad_value);
358 static reloc_howto_type *
359 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
364 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
365 if (elf_howto_table[i].name != NULL
366 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
367 return &elf_howto_table[i];
372 static reloc_howto_type *
373 elf_i386_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED, unsigned r_type)
377 if ((indx = r_type) >= R_386_standard
378 && ((indx = r_type - R_386_ext_offset) - R_386_standard
379 >= R_386_ext - R_386_standard)
380 && ((indx = r_type - R_386_tls_offset) - R_386_ext
381 >= R_386_ext2 - R_386_ext)
382 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
383 >= R_386_vt - R_386_ext2))
385 /* PR 17512: file: 0f67f69d. */
386 if (elf_howto_table [indx].type != r_type)
388 return &elf_howto_table[indx];
392 elf_i386_info_to_howto_rel (bfd *abfd,
394 Elf_Internal_Rela *dst)
396 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
398 if ((cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type)) == NULL)
400 /* xgettext:c-format */
401 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
403 bfd_set_error (bfd_error_bad_value);
410 /* Return whether a symbol name implies a local label. The UnixWare
411 2.1 cc generates temporary symbols that start with .X, so we
412 recognize them here. FIXME: do other SVR4 compilers also use .X?.
413 If so, we should move the .X recognition into
414 _bfd_elf_is_local_label_name. */
417 elf_i386_is_local_label_name (bfd *abfd, const char *name)
419 if (name[0] == '.' && name[1] == 'X')
422 return _bfd_elf_is_local_label_name (abfd, name);
425 /* Support for core dump NOTE sections. */
428 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
433 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
435 int pr_version = bfd_get_32 (abfd, note->descdata);
441 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
444 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
448 size = bfd_get_32 (abfd, note->descdata + 8);
452 switch (note->descsz)
457 case 144: /* Linux/i386 */
459 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
462 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
472 /* Make a ".reg/999" section. */
473 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
474 size, note->descpos + offset);
478 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
480 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
482 int pr_version = bfd_get_32 (abfd, note->descdata);
487 elf_tdata (abfd)->core->program
488 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
489 elf_tdata (abfd)->core->command
490 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
494 switch (note->descsz)
499 case 124: /* Linux/i386 elf_prpsinfo. */
500 elf_tdata (abfd)->core->pid
501 = bfd_get_32 (abfd, note->descdata + 12);
502 elf_tdata (abfd)->core->program
503 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
504 elf_tdata (abfd)->core->command
505 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
509 /* Note that for some reason, a spurious space is tacked
510 onto the end of the args in some (at least one anyway)
511 implementations, so strip it off if it exists. */
513 char *command = elf_tdata (abfd)->core->command;
514 int n = strlen (command);
516 if (0 < n && command[n - 1] == ' ')
517 command[n - 1] = '\0';
523 /* Functions for the i386 ELF linker.
525 In order to gain some understanding of code in this file without
526 knowing all the intricate details of the linker, note the
529 Functions named elf_i386_* are called by external routines, other
530 functions are only called locally. elf_i386_* functions appear
531 in this file more or less in the order in which they are called
532 from external routines. eg. elf_i386_check_relocs is called
533 early in the link process, elf_i386_finish_dynamic_sections is
534 one of the last functions. */
536 /* The size in bytes of an entry in the lazy procedure linkage table. */
538 #define LAZY_PLT_ENTRY_SIZE 16
540 /* The size in bytes of an entry in the non-lazy procedure linkage
543 #define NON_LAZY_PLT_ENTRY_SIZE 8
545 /* The first entry in an absolute lazy procedure linkage table looks
546 like this. See the SVR4 ABI i386 supplement to see how this works.
547 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
549 static const bfd_byte elf_i386_lazy_plt0_entry[12] =
551 0xff, 0x35, /* pushl contents of address */
552 0, 0, 0, 0, /* replaced with address of .got + 4. */
553 0xff, 0x25, /* jmp indirect */
554 0, 0, 0, 0 /* replaced with address of .got + 8. */
557 /* Subsequent entries in an absolute lazy procedure linkage table look
560 static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
562 0xff, 0x25, /* jmp indirect */
563 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
564 0x68, /* pushl immediate */
565 0, 0, 0, 0, /* replaced with offset into relocation table. */
566 0xe9, /* jmp relative */
567 0, 0, 0, 0 /* replaced with offset to start of .plt. */
570 /* The first entry in a PIC lazy procedure linkage table look like
571 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
572 lazy_plt->plt0_pad_byte. */
574 static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] =
576 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
577 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
580 /* Subsequent entries in a PIC lazy procedure linkage table look like
583 static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] =
585 0xff, 0xa3, /* jmp *offset(%ebx) */
586 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
587 0x68, /* pushl immediate */
588 0, 0, 0, 0, /* replaced with offset into relocation table. */
589 0xe9, /* jmp relative */
590 0, 0, 0, 0 /* replaced with offset to start of .plt. */
593 /* Entries in the non-lazy procedure linkage table look like this. */
595 static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
597 0xff, 0x25, /* jmp indirect */
598 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
599 0x66, 0x90 /* xchg %ax,%ax */
602 /* Entries in the PIC non-lazy procedure linkage table look like
605 static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] =
607 0xff, 0xa3, /* jmp *offset(%ebx) */
608 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
612 /* The first entry in an absolute IBT-enabled lazy procedure linkage
613 table looks like this. */
615 static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
617 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
618 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
619 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
622 /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
623 table look like this. Subsequent entries for a PIC IBT-enabled lazy
624 procedure linkage table are the same. */
626 static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
628 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
629 0x68, 0, 0, 0, 0, /* pushl immediate */
630 0xe9, 0, 0, 0, 0, /* jmp relative */
631 0x66, 0x90 /* xchg %ax,%ax */
634 /* The first entry in a PIC IBT-enabled lazy procedure linkage table
637 static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] =
639 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
640 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
641 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
644 /* Entries for branches with IBT-enabled in the absolute non-lazey
645 procedure linkage table look like this. They have the same size
646 as the lazy PLT entry. */
648 static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
650 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
651 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
652 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
655 /* Entries for branches with IBT-enabled in the PIC non-lazey procedure
656 linkage table look like this. They have the same size as the lazy
659 static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] =
661 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
662 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
663 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
666 /* .eh_frame covering the lazy .plt section. */
668 static const bfd_byte elf_i386_eh_frame_lazy_plt[] =
670 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
671 0, 0, 0, 0, /* CIE ID */
673 'z', 'R', 0, /* Augmentation string */
674 1, /* Code alignment factor */
675 0x7c, /* Data alignment factor */
676 8, /* Return address column */
677 1, /* Augmentation size */
678 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
679 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
680 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
681 DW_CFA_nop, DW_CFA_nop,
683 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
684 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
685 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
686 0, 0, 0, 0, /* .plt size goes here */
687 0, /* Augmentation size */
688 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
689 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
690 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
691 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
692 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
693 11, /* Block length */
694 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
695 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
696 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
697 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
698 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
701 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
703 static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] =
705 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
706 0, 0, 0, 0, /* CIE ID */
708 'z', 'R', 0, /* Augmentation string */
709 1, /* Code alignment factor */
710 0x7c, /* Data alignment factor */
711 8, /* Return address column */
712 1, /* Augmentation size */
713 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
714 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
715 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
716 DW_CFA_nop, DW_CFA_nop,
718 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
719 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
720 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
721 0, 0, 0, 0, /* .plt size goes here */
722 0, /* Augmentation size */
723 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
724 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
725 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
726 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
727 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
728 11, /* Block length */
729 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
730 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
731 DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge,
732 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
733 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
736 /* .eh_frame covering the non-lazy .plt section. */
738 static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] =
740 #define PLT_GOT_FDE_LENGTH 16
741 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
742 0, 0, 0, 0, /* CIE ID */
744 'z', 'R', 0, /* Augmentation string */
745 1, /* Code alignment factor */
746 0x7c, /* Data alignment factor */
747 8, /* Return address column */
748 1, /* Augmentation size */
749 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
750 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
751 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
752 DW_CFA_nop, DW_CFA_nop,
754 PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */
755 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
756 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
757 0, 0, 0, 0, /* non-lazy .plt size goes here */
758 0, /* Augmentation size */
759 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
762 /* These are the standard parameters. */
763 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt =
765 elf_i386_lazy_plt0_entry, /* plt0_entry */
766 sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */
767 elf_i386_lazy_plt_entry, /* plt_entry */
768 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
769 NULL, /* plt_tlsdesc_entry */
770 0, /* plt_tlsdesc_entry_size*/
771 0, /* plt_tlsdesc_got1_offset */
772 0, /* plt_tlsdesc_got2_offset */
773 0, /* plt_tlsdesc_got1_insn_end */
774 0, /* plt_tlsdesc_got2_insn_end */
775 2, /* plt0_got1_offset */
776 8, /* plt0_got2_offset */
777 0, /* plt0_got2_insn_end */
778 2, /* plt_got_offset */
779 7, /* plt_reloc_offset */
780 12, /* plt_plt_offset */
781 0, /* plt_got_insn_size */
782 0, /* plt_plt_insn_end */
783 6, /* plt_lazy_offset */
784 elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */
785 elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */
786 elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */
787 sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */
790 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt =
792 elf_i386_non_lazy_plt_entry, /* plt_entry */
793 elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */
794 NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
795 2, /* plt_got_offset */
796 0, /* plt_got_insn_size */
797 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
798 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
801 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt =
803 elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */
804 sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */
805 elf_i386_lazy_ibt_plt_entry, /* plt_entry */
806 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
807 NULL, /* plt_tlsdesc_entry */
808 0, /* plt_tlsdesc_entry_size*/
809 0, /* plt_tlsdesc_got1_offset */
810 0, /* plt_tlsdesc_got2_offset */
811 0, /* plt_tlsdesc_got1_insn_end */
812 0, /* plt_tlsdesc_got2_insn_end */
813 2, /* plt0_got1_offset */
814 8, /* plt0_got2_offset */
815 0, /* plt0_got2_insn_end */
816 4+2, /* plt_got_offset */
817 4+1, /* plt_reloc_offset */
818 4+6, /* plt_plt_offset */
819 0, /* plt_got_insn_size */
820 0, /* plt_plt_insn_end */
821 0, /* plt_lazy_offset */
822 elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */
823 elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */
824 elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */
825 sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */
828 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt =
830 elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */
831 elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */
832 LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */
833 4+2, /* plt_got_offset */
834 0, /* plt_got_insn_size */
835 elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */
836 sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */
840 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
841 for the PLTResolve stub and then for each PLT entry. */
842 #define PLTRESOLVE_RELOCS_SHLIB 0
843 #define PLTRESOLVE_RELOCS 2
844 #define PLT_NON_JUMP_SLOT_RELOCS 2
846 /* These are the standard parameters. */
847 static const struct elf_x86_backend_data elf_i386_arch_bed =
852 #define elf_backend_arch_data &elf_i386_arch_bed
854 /* Return TRUE if the TLS access code sequence support transition
858 elf_i386_check_tls_transition (asection *sec,
860 Elf_Internal_Shdr *symtab_hdr,
861 struct elf_link_hash_entry **sym_hashes,
863 const Elf_Internal_Rela *rel,
864 const Elf_Internal_Rela *relend)
866 unsigned int val, type, reg;
867 unsigned long r_symndx;
868 struct elf_link_hash_entry *h;
871 bfd_boolean indirect_call;
873 offset = rel->r_offset;
878 if (offset < 2 || (rel + 1) >= relend)
881 indirect_call = FALSE;
882 call = contents + offset + 4;
885 if (r_type == R_386_TLS_GD)
887 /* Check transition from GD access model. Only
888 leal foo@tlsgd(,%ebx,1), %eax
889 call ___tls_get_addr@PLT
891 leal foo@tlsgd(%ebx) %eax
892 call ___tls_get_addr@PLT
895 leal foo@tlsgd(%reg), %eax
896 call *___tls_get_addr@GOT(%reg)
897 which may be converted to
898 addr32 call ___tls_get_addr
899 can transit to different access model. */
900 if ((offset + 10) > sec->size
901 || (type != 0x8d && type != 0x04))
906 /* leal foo@tlsgd(,%ebx,1), %eax
907 call ___tls_get_addr@PLT */
911 if (*(call - 7) != 0x8d
919 leal foo@tlsgd(%ebx), %eax
920 call ___tls_get_addr@PLT
923 leal foo@tlsgd(%reg), %eax
924 call *___tls_get_addr@GOT(%reg)
925 which may be converted to
926 addr32 call ___tls_get_addr
928 %eax can't be used as the GOT base register since it
929 is used to pass parameter to ___tls_get_addr. */
931 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
934 indirect_call = call[0] == 0xff;
935 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
936 && !(call[0] == 0x67 && call[1] == 0xe8)
938 && (call[1] & 0xf8) == 0x90
939 && (call[1] & 0x7) == reg))
945 /* Check transition from LD access model. Only
946 leal foo@tlsldm(%ebx), %eax
947 call ___tls_get_addr@PLT
949 leal foo@tlsldm(%reg), %eax
950 call *___tls_get_addr@GOT(%reg)
951 which may be converted to
952 addr32 call ___tls_get_addr
953 can transit to different access model. */
954 if (type != 0x8d || (offset + 9) > sec->size)
957 /* %eax can't be used as the GOT base register since it is
958 used to pass parameter to ___tls_get_addr. */
960 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
963 indirect_call = call[0] == 0xff;
964 if (!(reg == 3 && call[0] == 0xe8)
965 && !(call[0] == 0x67 && call[1] == 0xe8)
967 && (call[1] & 0xf8) == 0x90
968 && (call[1] & 0x7) == reg))
972 r_symndx = ELF32_R_SYM (rel[1].r_info);
973 if (r_symndx < symtab_hdr->sh_info)
976 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
978 || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr)
980 else if (indirect_call)
981 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
983 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
984 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
987 /* Check transition from IE access model:
988 movl foo@indntpoff(%rip), %eax
989 movl foo@indntpoff(%rip), %reg
990 addl foo@indntpoff(%rip), %reg
993 if (offset < 1 || (offset + 4) > sec->size)
996 /* Check "movl foo@tpoff(%rip), %eax" first. */
997 val = bfd_get_8 (abfd, contents + offset - 1);
1004 /* Check movl|addl foo@tpoff(%rip), %reg. */
1005 type = bfd_get_8 (abfd, contents + offset - 2);
1006 return ((type == 0x8b || type == 0x03)
1007 && (val & 0xc7) == 0x05);
1009 case R_386_TLS_GOTIE:
1010 case R_386_TLS_IE_32:
1011 /* Check transition from {IE_32,GOTIE} access model:
1012 subl foo@{tpoff,gontoff}(%reg1), %reg2
1013 movl foo@{tpoff,gontoff}(%reg1), %reg2
1014 addl foo@{tpoff,gontoff}(%reg1), %reg2
1017 if (offset < 2 || (offset + 4) > sec->size)
1020 val = bfd_get_8 (abfd, contents + offset - 1);
1021 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1024 type = bfd_get_8 (abfd, contents + offset - 2);
1025 return type == 0x8b || type == 0x2b || type == 0x03;
1027 case R_386_TLS_GOTDESC:
1028 /* Check transition from GDesc access model:
1029 leal x@tlsdesc(%ebx), %eax
1031 Make sure it's a leal adding ebx to a 32-bit offset
1032 into any register, although it's probably almost always
1035 if (offset < 2 || (offset + 4) > sec->size)
1038 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1041 val = bfd_get_8 (abfd, contents + offset - 1);
1042 return (val & 0xc7) == 0x83;
1044 case R_386_TLS_DESC_CALL:
1045 /* Check transition from GDesc access model:
1046 call *x@tlsdesc(%eax)
1048 if (offset + 2 <= sec->size)
1050 /* Make sure that it's a call *x@tlsdesc(%eax). */
1051 call = contents + offset;
1052 return call[0] == 0xff && call[1] == 0x10;
1062 /* Return TRUE if the TLS access transition is OK or no transition
1063 will be performed. Update R_TYPE if there is a transition. */
1066 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1067 asection *sec, bfd_byte *contents,
1068 Elf_Internal_Shdr *symtab_hdr,
1069 struct elf_link_hash_entry **sym_hashes,
1070 unsigned int *r_type, int tls_type,
1071 const Elf_Internal_Rela *rel,
1072 const Elf_Internal_Rela *relend,
1073 struct elf_link_hash_entry *h,
1074 unsigned long r_symndx,
1075 bfd_boolean from_relocate_section)
1077 unsigned int from_type = *r_type;
1078 unsigned int to_type = from_type;
1079 bfd_boolean check = TRUE;
1081 /* Skip TLS transition for functions. */
1083 && (h->type == STT_FUNC
1084 || h->type == STT_GNU_IFUNC))
1090 case R_386_TLS_GOTDESC:
1091 case R_386_TLS_DESC_CALL:
1092 case R_386_TLS_IE_32:
1094 case R_386_TLS_GOTIE:
1095 if (bfd_link_executable (info))
1098 to_type = R_386_TLS_LE_32;
1099 else if (from_type != R_386_TLS_IE
1100 && from_type != R_386_TLS_GOTIE)
1101 to_type = R_386_TLS_IE_32;
1104 /* When we are called from elf_i386_relocate_section, there may
1105 be additional transitions based on TLS_TYPE. */
1106 if (from_relocate_section)
1108 unsigned int new_to_type = to_type;
1110 if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type))
1111 new_to_type = R_386_TLS_LE_32;
1113 if (to_type == R_386_TLS_GD
1114 || to_type == R_386_TLS_GOTDESC
1115 || to_type == R_386_TLS_DESC_CALL)
1117 if (tls_type == GOT_TLS_IE_POS)
1118 new_to_type = R_386_TLS_GOTIE;
1119 else if (tls_type & GOT_TLS_IE)
1120 new_to_type = R_386_TLS_IE_32;
1123 /* We checked the transition before when we were called from
1124 elf_i386_check_relocs. We only want to check the new
1125 transition which hasn't been checked before. */
1126 check = new_to_type != to_type && from_type == to_type;
1127 to_type = new_to_type;
1133 if (bfd_link_executable (info))
1134 to_type = R_386_TLS_LE_32;
1141 /* Return TRUE if there is no transition. */
1142 if (from_type == to_type)
1145 /* Check if the transition can be performed. */
1147 && ! elf_i386_check_tls_transition (sec, contents,
1148 symtab_hdr, sym_hashes,
1149 from_type, rel, relend))
1151 reloc_howto_type *from, *to;
1154 from = elf_i386_rtype_to_howto (abfd, from_type);
1155 to = elf_i386_rtype_to_howto (abfd, to_type);
1158 name = h->root.root.string;
1161 struct elf_x86_link_hash_table *htab;
1163 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1168 Elf_Internal_Sym *isym;
1170 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1172 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1177 /* xgettext:c-format */
1178 (_("%pB: TLS transition from %s to %s against `%s'"
1179 " at %#" PRIx64 " in section `%pA' failed"),
1180 abfd, from->name, to->name, name,
1181 (uint64_t) rel->r_offset, sec);
1182 bfd_set_error (bfd_error_bad_value);
1190 /* With the local symbol, foo, we convert
1191 mov foo@GOT[(%reg1)], %reg2
1193 lea foo[@GOTOFF(%reg1)], %reg2
1195 call/jmp *foo@GOT[(%reg)]
1197 nop call foo/jmp foo nop
1198 When PIC is false, convert
1199 test %reg1, foo@GOT[(%reg2)]
1203 binop foo@GOT[(%reg1)], %reg2
1206 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1211 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1213 unsigned int *r_type_p,
1214 Elf_Internal_Rela *irel,
1215 struct elf_link_hash_entry *h,
1216 bfd_boolean *converted,
1217 struct bfd_link_info *link_info)
1219 struct elf_x86_link_hash_table *htab;
1220 unsigned int opcode;
1222 bfd_boolean baseless;
1223 Elf_Internal_Sym *isym;
1224 unsigned int addend;
1228 bfd_boolean to_reloc_32;
1229 unsigned int r_type;
1230 unsigned int r_symndx;
1231 bfd_vma roff = irel->r_offset;
1232 bfd_boolean local_ref;
1233 struct elf_x86_link_hash_entry *eh;
1238 /* Addend for R_386_GOT32X relocations must be 0. */
1239 addend = bfd_get_32 (abfd, contents + roff);
1243 htab = elf_x86_hash_table (link_info, I386_ELF_DATA);
1244 is_pic = bfd_link_pic (link_info);
1247 r_symndx = ELF32_R_SYM (irel->r_info);
1249 modrm = bfd_get_8 (abfd, contents + roff - 1);
1250 baseless = (modrm & 0xc7) == 0x5;
1252 if (baseless && is_pic)
1254 /* For PIC, disallow R_386_GOT32X without a base register
1255 since we don't know what the GOT base is. */
1260 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1262 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1265 name = h->root.root.string;
1268 /* xgettext:c-format */
1269 (_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base"
1270 " register can not be used when making a shared object"),
1275 opcode = bfd_get_8 (abfd, contents + roff - 2);
1277 /* Convert to R_386_32 if PIC is false or there is no base
1279 to_reloc_32 = !is_pic || baseless;
1281 eh = elf_x86_hash_entry (h);
1283 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1287 if (opcode == 0x0ff)
1288 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1289 goto convert_branch;
1291 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1292 "test %reg1, foo@GOT(%reg2)" and
1293 "binop foo@GOT[(%reg1)], %reg2". */
1297 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1298 local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h);
1300 /* Undefined weak symbol is only bound locally in executable
1301 and its reference is resolved as 0. */
1302 if (h->root.type == bfd_link_hash_undefweak
1308 /* No direct branch to 0 for PIC. */
1312 goto convert_branch;
1316 /* We can convert load of address 0 to R_386_32. */
1324 /* We have "call/jmp *foo@GOT[(%reg)]". */
1325 if ((h->root.type == bfd_link_hash_defined
1326 || h->root.type == bfd_link_hash_defweak)
1329 /* The function is locally defined. */
1331 /* Convert R_386_GOT32X to R_386_PC32. */
1332 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1334 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1337 /* To support TLS optimization, always use addr32 prefix
1338 for "call *___tls_get_addr@GOT(%reg)". */
1339 if (eh && eh->tls_get_addr)
1342 nop_offset = irel->r_offset - 2;
1346 nop = link_info->call_nop_byte;
1347 if (link_info->call_nop_as_suffix)
1349 nop_offset = roff + 3;
1350 irel->r_offset -= 1;
1353 nop_offset = roff - 2;
1358 /* Convert to "jmp foo nop". */
1361 nop_offset = roff + 3;
1362 irel->r_offset -= 1;
1365 bfd_put_8 (abfd, nop, contents + nop_offset);
1366 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1367 /* When converting to PC-relative relocation, we
1368 need to adjust addend by -4. */
1369 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1370 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1371 *r_type_p = R_386_PC32;
1377 /* We have "mov foo@GOT[(%re1g)], %reg2",
1378 "test %reg1, foo@GOT(%reg2)" and
1379 "binop foo@GOT[(%reg1)], %reg2".
1381 Avoid optimizing _DYNAMIC since ld.so may use its
1382 link-time address. */
1383 if (h == htab->elf.hdynamic)
1386 /* def_regular is set by an assignment in a linker script in
1387 bfd_elf_record_link_assignment. start_stop is set on
1388 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1392 || h->root.type == bfd_link_hash_defined
1393 || h->root.type == bfd_link_hash_defweak)
1401 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1402 "mov $foo, %reg2" with R_386_32. */
1404 modrm = 0xc0 | (modrm & 0x38) >> 3;
1405 bfd_put_8 (abfd, modrm, contents + roff - 1);
1410 /* Convert "mov foo@GOT(%reg1), %reg2" to
1411 "lea foo@GOTOFF(%reg1), %reg2". */
1412 r_type = R_386_GOTOFF;
1418 /* Only R_386_32 is supported. */
1424 /* Convert "test %reg1, foo@GOT(%reg2)" to
1425 "test $foo, %reg1". */
1426 modrm = 0xc0 | (modrm & 0x38) >> 3;
1431 /* Convert "binop foo@GOT(%reg1), %reg2" to
1432 "binop $foo, %reg2". */
1434 | (modrm & 0x38) >> 3
1438 bfd_put_8 (abfd, modrm, contents + roff - 1);
1442 bfd_put_8 (abfd, opcode, contents + roff - 2);
1443 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1452 /* Rename some of the generic section flags to better document how they
1454 #define check_relocs_failed sec_flg0
1456 /* Look through the relocs for a section during the first phase, and
1457 calculate needed space in the global offset table, procedure linkage
1458 table, and dynamic reloc sections. */
1461 elf_i386_check_relocs (bfd *abfd,
1462 struct bfd_link_info *info,
1464 const Elf_Internal_Rela *relocs)
1466 struct elf_x86_link_hash_table *htab;
1467 Elf_Internal_Shdr *symtab_hdr;
1468 struct elf_link_hash_entry **sym_hashes;
1469 const Elf_Internal_Rela *rel;
1470 const Elf_Internal_Rela *rel_end;
1473 bfd_boolean converted;
1475 if (bfd_link_relocatable (info))
1478 /* Don't do anything special with non-loaded, non-alloced sections.
1479 In particular, any relocs in such sections should not affect GOT
1480 and PLT reference counting (ie. we don't allow them to create GOT
1481 or PLT entries), there's no possibility or desire to optimize TLS
1482 relocs, and there's not much point in propagating relocs to shared
1483 libs that the dynamic linker won't relocate. */
1484 if ((sec->flags & SEC_ALLOC) == 0)
1487 htab = elf_x86_hash_table (info, I386_ELF_DATA);
1490 sec->check_relocs_failed = 1;
1494 BFD_ASSERT (is_x86_elf (abfd, htab));
1496 /* Get the section contents. */
1497 if (elf_section_data (sec)->this_hdr.contents != NULL)
1498 contents = elf_section_data (sec)->this_hdr.contents;
1499 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1501 sec->check_relocs_failed = 1;
1505 symtab_hdr = &elf_symtab_hdr (abfd);
1506 sym_hashes = elf_sym_hashes (abfd);
1512 rel_end = relocs + sec->reloc_count;
1513 for (rel = relocs; rel < rel_end; rel++)
1515 unsigned int r_type;
1516 unsigned int r_symndx;
1517 struct elf_link_hash_entry *h;
1518 struct elf_x86_link_hash_entry *eh;
1519 Elf_Internal_Sym *isym;
1521 bfd_boolean size_reloc;
1523 r_symndx = ELF32_R_SYM (rel->r_info);
1524 r_type = ELF32_R_TYPE (rel->r_info);
1526 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1528 /* xgettext:c-format */
1529 _bfd_error_handler (_("%pB: bad symbol index: %d"),
1534 if (r_symndx < symtab_hdr->sh_info)
1536 /* A local symbol. */
1537 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1542 /* Check relocation against local STT_GNU_IFUNC symbol. */
1543 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1545 h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE);
1549 /* Fake a STT_GNU_IFUNC symbol. */
1550 h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr,
1552 h->type = STT_GNU_IFUNC;
1555 h->forced_local = 1;
1556 h->root.type = bfd_link_hash_defined;
1564 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1565 while (h->root.type == bfd_link_hash_indirect
1566 || h->root.type == bfd_link_hash_warning)
1567 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1570 eh = (struct elf_x86_link_hash_entry *) h;
1573 if (r_type == R_386_GOTOFF)
1576 /* It is referenced by a non-shared object. */
1579 if (h->type == STT_GNU_IFUNC)
1580 elf_tdata (info->output_bfd)->has_gnu_symbols
1581 |= elf_gnu_symbol_ifunc;
1584 if (r_type == R_386_GOT32X
1585 && (h == NULL || h->type != STT_GNU_IFUNC))
1587 Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel;
1588 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
1594 if (! elf_i386_tls_transition (info, abfd, sec, contents,
1595 symtab_hdr, sym_hashes,
1596 &r_type, GOT_UNKNOWN,
1597 rel, rel_end, h, r_symndx, FALSE))
1600 /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
1601 if (h == htab->elf.hgot)
1602 htab->got_referenced = TRUE;
1607 htab->tls_ld_or_ldm_got.refcount = 1;
1611 /* This symbol requires a procedure linkage table entry. We
1612 actually build the entry in adjust_dynamic_symbol,
1613 because this might be a case of linking PIC code which is
1614 never referenced by a dynamic object, in which case we
1615 don't need to generate a procedure linkage table entry
1618 /* If this is a local symbol, we resolve it directly without
1619 creating a procedure linkage table entry. */
1623 eh->zero_undefweak &= 0x2;
1625 h->plt.refcount = 1;
1632 case R_386_TLS_IE_32:
1634 case R_386_TLS_GOTIE:
1635 if (!bfd_link_executable (info))
1636 info->flags |= DF_STATIC_TLS;
1642 case R_386_TLS_GOTDESC:
1643 case R_386_TLS_DESC_CALL:
1644 /* This symbol requires a global offset table entry. */
1646 int tls_type, old_tls_type;
1653 tls_type = GOT_NORMAL;
1655 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1656 case R_386_TLS_GOTDESC:
1657 case R_386_TLS_DESC_CALL:
1658 tls_type = GOT_TLS_GDESC; break;
1659 case R_386_TLS_IE_32:
1660 if (ELF32_R_TYPE (rel->r_info) == r_type)
1661 tls_type = GOT_TLS_IE_NEG;
1663 /* If this is a GD->IE transition, we may use either of
1664 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1665 tls_type = GOT_TLS_IE;
1668 case R_386_TLS_GOTIE:
1669 tls_type = GOT_TLS_IE_POS; break;
1674 h->got.refcount = 1;
1675 old_tls_type = elf_x86_hash_entry (h)->tls_type;
1679 bfd_signed_vma *local_got_refcounts;
1681 /* This is a global offset table entry for a local symbol. */
1682 local_got_refcounts = elf_local_got_refcounts (abfd);
1683 if (local_got_refcounts == NULL)
1687 size = symtab_hdr->sh_info;
1688 size *= (sizeof (bfd_signed_vma)
1689 + sizeof (bfd_vma) + sizeof(char));
1690 local_got_refcounts = (bfd_signed_vma *)
1691 bfd_zalloc (abfd, size);
1692 if (local_got_refcounts == NULL)
1694 elf_local_got_refcounts (abfd) = local_got_refcounts;
1695 elf_x86_local_tlsdesc_gotent (abfd)
1696 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1697 elf_x86_local_got_tls_type (abfd)
1698 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1700 local_got_refcounts[r_symndx] = 1;
1701 old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx];
1704 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1705 tls_type |= old_tls_type;
1706 /* If a TLS symbol is accessed using IE at least once,
1707 there is no point to use dynamic model for it. */
1708 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1709 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1710 || (tls_type & GOT_TLS_IE) == 0))
1712 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1713 tls_type = old_tls_type;
1714 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1715 && GOT_TLS_GD_ANY_P (tls_type))
1716 tls_type |= old_tls_type;
1720 name = h->root.root.string;
1722 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1725 /* xgettext:c-format */
1726 (_("%pB: `%s' accessed both as normal and "
1727 "thread local symbol"),
1729 bfd_set_error (bfd_error_bad_value);
1734 if (old_tls_type != tls_type)
1737 elf_x86_hash_entry (h)->tls_type = tls_type;
1739 elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type;
1747 if (r_type != R_386_TLS_IE)
1751 eh->zero_undefweak &= 0x2;
1753 /* Need GOT to resolve undefined weak symbol to 0. */
1754 if (r_type == R_386_GOTOFF
1755 && h->root.type == bfd_link_hash_undefweak
1756 && bfd_link_executable (info))
1757 htab->got_referenced = TRUE;
1763 case R_386_TLS_LE_32:
1766 eh->zero_undefweak &= 0x2;
1767 if (bfd_link_executable (info))
1769 info->flags |= DF_STATIC_TLS;
1774 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1775 eh->zero_undefweak |= 0x2;
1777 /* We are called after all symbols have been resolved. Only
1778 relocation against STT_GNU_IFUNC symbol must go through
1781 && (bfd_link_executable (info)
1782 || h->type == STT_GNU_IFUNC))
1784 bfd_boolean func_pointer_ref = FALSE;
1786 if (r_type == R_386_PC32)
1788 /* Since something like ".long foo - ." may be used
1789 as pointer, make sure that PLT is used if foo is
1790 a function defined in a shared library. */
1791 if ((sec->flags & SEC_CODE) == 0)
1792 h->pointer_equality_needed = 1;
1793 else if (h->type == STT_GNU_IFUNC
1794 && bfd_link_pic (info))
1797 /* xgettext:c-format */
1798 (_("%pB: unsupported non-PIC call to IFUNC `%s'"),
1799 abfd, h->root.root.string);
1800 bfd_set_error (bfd_error_bad_value);
1806 h->pointer_equality_needed = 1;
1807 /* R_386_32 can be resolved at run-time. */
1808 if (r_type == R_386_32
1809 && (sec->flags & SEC_READONLY) == 0)
1810 func_pointer_ref = TRUE;
1813 if (!func_pointer_ref)
1815 /* If this reloc is in a read-only section, we might
1816 need a copy reloc. We can't check reliably at this
1817 stage whether the section is read-only, as input
1818 sections have not yet been mapped to output sections.
1819 Tentatively set the flag for now, and correct in
1820 adjust_dynamic_symbol. */
1823 /* We may need a .plt entry if the symbol is a function
1824 defined in a shared lib or is a function referenced
1825 from the code or read-only section. */
1827 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
1828 h->plt.refcount = 1;
1834 if (NEED_DYNAMIC_RELOCATION_P (info, FALSE, h, sec, r_type,
1837 struct elf_dyn_relocs *p;
1838 struct elf_dyn_relocs **head;
1840 /* We must copy these reloc types into the output file.
1841 Create a reloc section in dynobj and make room for
1845 sreloc = _bfd_elf_make_dynamic_reloc_section
1846 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1852 /* If this is a global symbol, we count the number of
1853 relocations we need for this symbol. */
1856 head = &eh->dyn_relocs;
1860 /* Track dynamic relocs needed for local syms too.
1861 We really need local syms available to do this
1866 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1871 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1875 vpp = &elf_section_data (s)->local_dynrel;
1876 head = (struct elf_dyn_relocs **)vpp;
1880 if (p == NULL || p->sec != sec)
1882 bfd_size_type amt = sizeof *p;
1883 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1895 /* Count size relocation as PC-relative relocation. */
1896 if (r_type == R_386_PC32 || size_reloc)
1901 /* This relocation describes the C++ object vtable hierarchy.
1902 Reconstruct it for later use during GC. */
1903 case R_386_GNU_VTINHERIT:
1904 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1908 /* This relocation describes which C++ vtable entries are actually
1909 used. Record for later use during GC. */
1910 case R_386_GNU_VTENTRY:
1911 BFD_ASSERT (h != NULL);
1913 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1922 if (elf_section_data (sec)->this_hdr.contents != contents)
1924 if (!converted && !info->keep_memory)
1928 /* Cache the section contents for elf_link_input_bfd if any
1929 load is converted or --no-keep-memory isn't used. */
1930 elf_section_data (sec)->this_hdr.contents = contents;
1934 /* Cache relocations if any load is converted. */
1935 if (elf_section_data (sec)->relocs != relocs && converted)
1936 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
1941 if (elf_section_data (sec)->this_hdr.contents != contents)
1943 sec->check_relocs_failed = 1;
1947 /* Set the correct type for an x86 ELF section. We do this by the
1948 section name, which is a hack, but ought to work. */
1951 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1952 Elf_Internal_Shdr *hdr,
1957 name = bfd_get_section_name (abfd, sec);
1959 /* This is an ugly, but unfortunately necessary hack that is
1960 needed when producing EFI binaries on x86. It tells
1961 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1962 containing ELF relocation info. We need this hack in order to
1963 be able to generate ELF binaries that can be translated into
1964 EFI applications (which are essentially COFF objects). Those
1965 files contain a COFF ".reloc" section inside an ELFNN object,
1966 which would normally cause BFD to segfault because it would
1967 attempt to interpret this section as containing relocation
1968 entries for section "oc". With this hack enabled, ".reloc"
1969 will be treated as a normal data section, which will avoid the
1970 segfault. However, you won't be able to create an ELFNN binary
1971 with a section named "oc" that needs relocations, but that's
1972 the kind of ugly side-effects you get when detecting section
1973 types based on their names... In practice, this limitation is
1974 unlikely to bite. */
1975 if (strcmp (name, ".reloc") == 0)
1976 hdr->sh_type = SHT_PROGBITS;
1981 /* Return the relocation value for @tpoff relocation
1982 if STT_TLS virtual address is ADDRESS. */
1985 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
1987 struct elf_link_hash_table *htab = elf_hash_table (info);
1988 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
1989 bfd_vma static_tls_size;
1991 /* If tls_sec is NULL, we should have signalled an error already. */
1992 if (htab->tls_sec == NULL)
1995 /* Consider special static TLS alignment requirements. */
1996 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
1997 return static_tls_size + htab->tls_sec->vma - address;
2000 /* Relocate an i386 ELF section. */
2003 elf_i386_relocate_section (bfd *output_bfd,
2004 struct bfd_link_info *info,
2006 asection *input_section,
2008 Elf_Internal_Rela *relocs,
2009 Elf_Internal_Sym *local_syms,
2010 asection **local_sections)
2012 struct elf_x86_link_hash_table *htab;
2013 Elf_Internal_Shdr *symtab_hdr;
2014 struct elf_link_hash_entry **sym_hashes;
2015 bfd_vma *local_got_offsets;
2016 bfd_vma *local_tlsdesc_gotents;
2017 Elf_Internal_Rela *rel;
2018 Elf_Internal_Rela *wrel;
2019 Elf_Internal_Rela *relend;
2020 bfd_boolean is_vxworks_tls;
2021 unsigned plt_entry_size;
2023 /* Skip if check_relocs failed. */
2024 if (input_section->check_relocs_failed)
2027 htab = elf_x86_hash_table (info, I386_ELF_DATA);
2031 BFD_ASSERT (is_x86_elf (input_bfd, htab));
2033 symtab_hdr = &elf_symtab_hdr (input_bfd);
2034 sym_hashes = elf_sym_hashes (input_bfd);
2035 local_got_offsets = elf_local_got_offsets (input_bfd);
2036 local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd);
2037 /* We have to handle relocations in vxworks .tls_vars sections
2038 specially, because the dynamic loader is 'weird'. */
2039 is_vxworks_tls = (htab->target_os == is_vxworks
2040 && bfd_link_pic (info)
2041 && !strcmp (input_section->output_section->name,
2044 _bfd_x86_elf_set_tls_module_base (info);
2046 plt_entry_size = htab->plt.plt_entry_size;
2048 rel = wrel = relocs;
2049 relend = relocs + input_section->reloc_count;
2050 for (; rel < relend; wrel++, rel++)
2052 unsigned int r_type, r_type_tls;
2053 reloc_howto_type *howto;
2054 unsigned long r_symndx;
2055 struct elf_link_hash_entry *h;
2056 struct elf_x86_link_hash_entry *eh;
2057 Elf_Internal_Sym *sym;
2059 bfd_vma off, offplt, plt_offset;
2061 bfd_boolean unresolved_reloc;
2062 bfd_reloc_status_type r;
2066 asection *resolved_plt;
2067 bfd_boolean resolved_to_zero;
2068 bfd_boolean relative_reloc;
2070 r_type = ELF32_R_TYPE (rel->r_info);
2071 if (r_type == R_386_GNU_VTINHERIT
2072 || r_type == R_386_GNU_VTENTRY)
2079 if ((indx = r_type) >= R_386_standard
2080 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2081 >= R_386_ext - R_386_standard)
2082 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2083 >= R_386_ext2 - R_386_ext))
2084 return _bfd_unrecognized_reloc (input_bfd, input_section, r_type);
2086 howto = elf_howto_table + indx;
2088 r_symndx = ELF32_R_SYM (rel->r_info);
2092 unresolved_reloc = FALSE;
2093 if (r_symndx < symtab_hdr->sh_info)
2095 sym = local_syms + r_symndx;
2096 sec = local_sections[r_symndx];
2097 relocation = (sec->output_section->vma
2098 + sec->output_offset
2100 st_size = sym->st_size;
2102 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2103 && ((sec->flags & SEC_MERGE) != 0
2104 || (bfd_link_relocatable (info)
2105 && sec->output_offset != 0)))
2108 bfd_byte *where = contents + rel->r_offset;
2110 switch (howto->size)
2113 addend = bfd_get_8 (input_bfd, where);
2114 if (howto->pc_relative)
2116 addend = (addend ^ 0x80) - 0x80;
2121 addend = bfd_get_16 (input_bfd, where);
2122 if (howto->pc_relative)
2124 addend = (addend ^ 0x8000) - 0x8000;
2129 addend = bfd_get_32 (input_bfd, where);
2130 if (howto->pc_relative)
2132 addend = (addend ^ 0x80000000) - 0x80000000;
2140 if (bfd_link_relocatable (info))
2141 addend += sec->output_offset;
2144 asection *msec = sec;
2145 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2147 addend -= relocation;
2148 addend += msec->output_section->vma + msec->output_offset;
2151 switch (howto->size)
2154 /* FIXME: overflow checks. */
2155 if (howto->pc_relative)
2157 bfd_put_8 (input_bfd, addend, where);
2160 if (howto->pc_relative)
2162 bfd_put_16 (input_bfd, addend, where);
2165 if (howto->pc_relative)
2167 bfd_put_32 (input_bfd, addend, where);
2171 else if (!bfd_link_relocatable (info)
2172 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2174 /* Relocate against local STT_GNU_IFUNC symbol. */
2175 h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel,
2180 /* Set STT_GNU_IFUNC symbol value. */
2181 h->root.u.def.value = sym->st_value;
2182 h->root.u.def.section = sec;
2187 bfd_boolean warned ATTRIBUTE_UNUSED;
2188 bfd_boolean ignored ATTRIBUTE_UNUSED;
2190 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2191 r_symndx, symtab_hdr, sym_hashes,
2193 unresolved_reloc, warned, ignored);
2197 if (sec != NULL && discarded_section (sec))
2199 _bfd_clear_contents (howto, input_bfd, input_section,
2200 contents + rel->r_offset);
2201 wrel->r_offset = rel->r_offset;
2205 /* For ld -r, remove relocations in debug sections against
2206 sections defined in discarded sections. Not done for
2207 eh_frame editing code expects to be present. */
2208 if (bfd_link_relocatable (info)
2209 && (input_section->flags & SEC_DEBUGGING))
2215 if (bfd_link_relocatable (info))
2222 eh = (struct elf_x86_link_hash_entry *) h;
2224 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2225 it here if it is defined in a non-shared object. */
2227 && h->type == STT_GNU_IFUNC
2230 asection *gotplt, *base_got;
2234 if ((input_section->flags & SEC_ALLOC) == 0)
2236 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2237 STT_GNU_IFUNC symbol as STT_FUNC. */
2238 if (elf_section_type (input_section) == SHT_NOTE)
2240 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2241 sections because such sections are not SEC_ALLOC and
2242 thus ld.so will not process them. */
2243 if ((input_section->flags & SEC_DEBUGGING) != 0)
2248 /* STT_GNU_IFUNC symbol must go through PLT. */
2249 if (htab->elf.splt != NULL)
2251 if (htab->plt_second != NULL)
2253 resolved_plt = htab->plt_second;
2254 plt_offset = eh->plt_second.offset;
2258 resolved_plt = htab->elf.splt;
2259 plt_offset = h->plt.offset;
2261 gotplt = htab->elf.sgotplt;
2265 resolved_plt = htab->elf.iplt;
2266 plt_offset = h->plt.offset;
2267 gotplt = htab->elf.igotplt;
2277 base_got = htab->elf.sgot;
2278 off = h->got.offset;
2280 if (base_got == NULL)
2283 if (off == (bfd_vma) -1)
2285 /* We can't use h->got.offset here to save state, or
2286 even just remember the offset, as finish_dynamic_symbol
2287 would use that as offset into .got. */
2289 if (h->plt.offset == (bfd_vma) -1)
2292 if (htab->elf.splt != NULL)
2294 plt_index = (h->plt.offset / plt_entry_size
2295 - htab->plt.has_plt0);
2296 off = (plt_index + 3) * 4;
2297 base_got = htab->elf.sgotplt;
2301 plt_index = h->plt.offset / plt_entry_size;
2302 off = plt_index * 4;
2303 base_got = htab->elf.igotplt;
2306 if (h->dynindx == -1
2310 /* This references the local defitionion. We must
2311 initialize this entry in the global offset table.
2312 Since the offset must always be a multiple of 8,
2313 we use the least significant bit to record
2314 whether we have initialized it already.
2316 When doing a dynamic link, we create a .rela.got
2317 relocation entry to initialize the value. This
2318 is done in the finish_dynamic_symbol routine. */
2323 bfd_put_32 (output_bfd, relocation,
2324 base_got->contents + off);
2332 relocation = (base_got->output_section->vma
2333 + base_got->output_offset + off
2334 - gotplt->output_section->vma
2335 - gotplt->output_offset);
2337 if (rel->r_offset > 1
2338 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2339 && *(contents + rel->r_offset - 2) != 0x8d)
2341 if (bfd_link_pic (info))
2342 goto disallow_got32;
2344 /* Add the GOT base if there is no base register. */
2345 relocation += (gotplt->output_section->vma
2346 + gotplt->output_offset);
2348 else if (htab->elf.splt == NULL)
2350 /* Adjust for static executables. */
2351 relocation += gotplt->output_offset;
2357 if (h->plt.offset == (bfd_vma) -1)
2359 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2360 if (r_type == R_386_32
2361 && (input_section->flags & SEC_CODE) == 0)
2362 goto do_ifunc_pointer;
2363 goto bad_ifunc_reloc;
2366 relocation = (resolved_plt->output_section->vma
2367 + resolved_plt->output_offset + plt_offset);
2373 if (h->root.root.string)
2374 name = h->root.root.string;
2376 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2379 /* xgettext:c-format */
2380 (_("%pB: relocation %s against STT_GNU_IFUNC "
2381 "symbol `%s' isn't supported"), input_bfd,
2383 bfd_set_error (bfd_error_bad_value);
2387 /* Generate dynamic relcoation only when there is a
2388 non-GOT reference in a shared object. */
2389 if ((bfd_link_pic (info) && h->non_got_ref)
2390 || h->plt.offset == (bfd_vma) -1)
2392 Elf_Internal_Rela outrel;
2397 /* Need a dynamic relocation to get the real function
2399 offset = _bfd_elf_section_offset (output_bfd,
2403 if (offset == (bfd_vma) -1
2404 || offset == (bfd_vma) -2)
2407 outrel.r_offset = (input_section->output_section->vma
2408 + input_section->output_offset
2411 if (POINTER_LOCAL_IFUNC_P (info, h))
2413 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
2414 h->root.root.string,
2415 h->root.u.def.section->owner);
2417 /* This symbol is resolved locally. */
2418 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
2419 bfd_put_32 (output_bfd,
2420 (h->root.u.def.value
2421 + h->root.u.def.section->output_section->vma
2422 + h->root.u.def.section->output_offset),
2426 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2428 /* Dynamic relocations are stored in
2429 1. .rel.ifunc section in PIC object.
2430 2. .rel.got section in dynamic executable.
2431 3. .rel.iplt section in static executable. */
2432 if (bfd_link_pic (info))
2433 sreloc = htab->elf.irelifunc;
2434 else if (htab->elf.splt != NULL)
2435 sreloc = htab->elf.srelgot;
2437 sreloc = htab->elf.irelplt;
2438 elf_append_rel (output_bfd, sreloc, &outrel);
2440 /* If this reloc is against an external symbol, we
2441 do not want to fiddle with the addend. Otherwise,
2442 we need to include the symbol value so that it
2443 becomes an addend for the dynamic reloc. For an
2444 internal symbol, we have updated addend. */
2453 relocation -= (gotplt->output_section->vma
2454 + gotplt->output_offset);
2460 resolved_to_zero = (eh != NULL
2461 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
2467 /* Relocation is to the entry for this symbol in the global
2469 if (htab->elf.sgot == NULL)
2472 relative_reloc = FALSE;
2475 off = h->got.offset;
2476 if (RESOLVED_LOCALLY_P (info, h, htab))
2478 /* We must initialize this entry in the global offset
2479 table. Since the offset must always be a multiple
2480 of 4, we use the least significant bit to record
2481 whether we have initialized it already.
2483 When doing a dynamic link, we create a .rel.got
2484 relocation entry to initialize the value. This
2485 is done in the finish_dynamic_symbol routine. */
2490 bfd_put_32 (output_bfd, relocation,
2491 htab->elf.sgot->contents + off);
2494 if (GENERATE_RELATIVE_RELOC_P (info, h))
2496 /* PR ld/21402: If this symbol isn't dynamic
2497 in PIC, generate R_386_RELATIVE here. */
2498 eh->no_finish_dynamic_symbol = 1;
2499 relative_reloc = TRUE;
2504 unresolved_reloc = FALSE;
2508 if (local_got_offsets == NULL)
2511 off = local_got_offsets[r_symndx];
2513 /* The offset must always be a multiple of 4. We use
2514 the least significant bit to record whether we have
2515 already generated the necessary reloc. */
2520 bfd_put_32 (output_bfd, relocation,
2521 htab->elf.sgot->contents + off);
2522 local_got_offsets[r_symndx] |= 1;
2524 if (bfd_link_pic (info))
2525 relative_reloc = TRUE;
2532 Elf_Internal_Rela outrel;
2534 s = htab->elf.srelgot;
2538 outrel.r_offset = (htab->elf.sgot->output_section->vma
2539 + htab->elf.sgot->output_offset
2541 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2542 elf_append_rel (output_bfd, s, &outrel);
2545 if (off >= (bfd_vma) -2)
2548 relocation = (htab->elf.sgot->output_section->vma
2549 + htab->elf.sgot->output_offset + off);
2550 if (rel->r_offset > 1
2551 && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5
2552 && *(contents + rel->r_offset - 2) != 0x8d)
2554 if (bfd_link_pic (info))
2556 /* For PIC, disallow R_386_GOT32 without a base
2557 register, except for "lea foo@GOT, %reg", since
2558 we don't know what the GOT base is. */
2562 if (h == NULL || h->root.root.string == NULL)
2563 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2566 name = h->root.root.string;
2569 /* xgettext:c-format */
2570 (_("%pB: direct GOT relocation %s against `%s'"
2571 " without base register can not be used"
2572 " when making a shared object"),
2573 input_bfd, howto->name, name);
2574 bfd_set_error (bfd_error_bad_value);
2580 /* Subtract the .got.plt section address only with a base
2582 relocation -= (htab->elf.sgotplt->output_section->vma
2583 + htab->elf.sgotplt->output_offset);
2589 /* Relocation is relative to the start of the global offset
2592 /* Check to make sure it isn't a protected function or data
2593 symbol for shared library since it may not be local when
2594 used as function address or with copy relocation. We also
2595 need to make sure that a symbol is referenced locally. */
2596 if (!bfd_link_executable (info) && h)
2598 if (!h->def_regular)
2602 switch (ELF_ST_VISIBILITY (h->other))
2605 v = _("hidden symbol");
2608 v = _("internal symbol");
2611 v = _("protected symbol");
2619 /* xgettext:c-format */
2620 (_("%pB: relocation R_386_GOTOFF against undefined %s"
2621 " `%s' can not be used when making a shared object"),
2622 input_bfd, v, h->root.root.string);
2623 bfd_set_error (bfd_error_bad_value);
2626 else if (!SYMBOL_REFERENCES_LOCAL_P (info, h)
2627 && (h->type == STT_FUNC
2628 || h->type == STT_OBJECT)
2629 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2632 /* xgettext:c-format */
2633 (_("%pB: relocation R_386_GOTOFF against protected %s"
2634 " `%s' can not be used when making a shared object"),
2636 h->type == STT_FUNC ? "function" : "data",
2637 h->root.root.string);
2638 bfd_set_error (bfd_error_bad_value);
2643 /* Note that sgot is not involved in this
2644 calculation. We always want the start of .got.plt. If we
2645 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2646 permitted by the ABI, we might have to change this
2648 relocation -= htab->elf.sgotplt->output_section->vma
2649 + htab->elf.sgotplt->output_offset;
2653 /* Use global offset table as symbol value. */
2654 relocation = htab->elf.sgotplt->output_section->vma
2655 + htab->elf.sgotplt->output_offset;
2656 unresolved_reloc = FALSE;
2660 /* Relocation is to the entry for this symbol in the
2661 procedure linkage table. */
2663 /* Resolve a PLT32 reloc against a local symbol directly,
2664 without using the procedure linkage table. */
2668 if ((h->plt.offset == (bfd_vma) -1
2669 && eh->plt_got.offset == (bfd_vma) -1)
2670 || htab->elf.splt == NULL)
2672 /* We didn't make a PLT entry for this symbol. This
2673 happens when statically linking PIC code, or when
2674 using -Bsymbolic. */
2678 if (h->plt.offset != (bfd_vma) -1)
2680 if (htab->plt_second != NULL)
2682 resolved_plt = htab->plt_second;
2683 plt_offset = eh->plt_second.offset;
2687 resolved_plt = htab->elf.splt;
2688 plt_offset = h->plt.offset;
2693 resolved_plt = htab->plt_got;
2694 plt_offset = eh->plt_got.offset;
2697 relocation = (resolved_plt->output_section->vma
2698 + resolved_plt->output_offset
2700 unresolved_reloc = FALSE;
2704 /* Set to symbol size. */
2705 relocation = st_size;
2710 if ((input_section->flags & SEC_ALLOC) == 0
2714 if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type,
2715 FALSE, resolved_to_zero,
2716 (r_type == R_386_PC32)))
2718 Elf_Internal_Rela outrel;
2719 bfd_boolean skip, relocate;
2722 /* When generating a shared object, these relocations
2723 are copied into the output file to be resolved at run
2730 _bfd_elf_section_offset (output_bfd, info, input_section,
2732 if (outrel.r_offset == (bfd_vma) -1)
2734 else if (outrel.r_offset == (bfd_vma) -2)
2735 skip = TRUE, relocate = TRUE;
2736 outrel.r_offset += (input_section->output_section->vma
2737 + input_section->output_offset);
2740 memset (&outrel, 0, sizeof outrel);
2741 else if (COPY_INPUT_RELOC_P (info, h, r_type))
2742 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2745 /* This symbol is local, or marked to become local. */
2747 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2750 sreloc = elf_section_data (input_section)->sreloc;
2752 if (sreloc == NULL || sreloc->contents == NULL)
2754 r = bfd_reloc_notsupported;
2755 goto check_relocation_error;
2758 elf_append_rel (output_bfd, sreloc, &outrel);
2760 /* If this reloc is against an external symbol, we do
2761 not want to fiddle with the addend. Otherwise, we
2762 need to include the symbol value so that it becomes
2763 an addend for the dynamic reloc. */
2770 if (!bfd_link_executable (info))
2772 Elf_Internal_Rela outrel;
2775 outrel.r_offset = rel->r_offset
2776 + input_section->output_section->vma
2777 + input_section->output_offset;
2778 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2779 sreloc = elf_section_data (input_section)->sreloc;
2782 elf_append_rel (output_bfd, sreloc, &outrel);
2787 case R_386_TLS_GOTDESC:
2788 case R_386_TLS_DESC_CALL:
2789 case R_386_TLS_IE_32:
2790 case R_386_TLS_GOTIE:
2791 tls_type = GOT_UNKNOWN;
2792 if (h == NULL && local_got_offsets)
2793 tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx];
2795 tls_type = elf_x86_hash_entry(h)->tls_type;
2796 if (tls_type == GOT_TLS_IE)
2797 tls_type = GOT_TLS_IE_NEG;
2799 r_type_tls = r_type;
2800 if (! elf_i386_tls_transition (info, input_bfd,
2801 input_section, contents,
2802 symtab_hdr, sym_hashes,
2803 &r_type_tls, tls_type, rel,
2804 relend, h, r_symndx, TRUE))
2807 if (r_type_tls == R_386_TLS_LE_32)
2809 BFD_ASSERT (! unresolved_reloc);
2810 if (r_type == R_386_TLS_GD)
2815 /* GD->LE transition. */
2816 type = *(contents + rel->r_offset - 2);
2820 leal foo@tlsgd(,%ebx,1), %eax
2821 call ___tls_get_addr@PLT
2824 subl $foo@tpoff, %eax
2825 (6 byte form of subl). */
2826 roff = rel->r_offset + 5;
2831 leal foo@tlsgd(%ebx), %eax
2832 call ___tls_get_addr@PLT
2835 leal foo@tlsgd(%reg), %eax
2836 call *___tls_get_addr@GOT(%reg)
2837 which may be converted to
2838 addr32 call ___tls_get_addr
2840 movl %gs:0, %eax; subl $foo@tpoff, %eax
2841 (6 byte form of subl). */
2842 roff = rel->r_offset + 6;
2844 memcpy (contents + roff - 8,
2845 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2846 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
2848 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
2853 else if (r_type == R_386_TLS_GOTDESC)
2855 /* GDesc -> LE transition.
2856 It's originally something like:
2857 leal x@tlsdesc(%ebx), %eax
2861 Registers other than %eax may be set up here. */
2866 roff = rel->r_offset;
2867 val = bfd_get_8 (input_bfd, contents + roff - 1);
2869 /* Now modify the instruction as appropriate. */
2870 /* aoliva FIXME: remove the above and xor the byte
2872 bfd_put_8 (output_bfd, val ^ 0x86,
2873 contents + roff - 1);
2874 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
2878 else if (r_type == R_386_TLS_DESC_CALL)
2880 /* GDesc -> LE transition.
2888 roff = rel->r_offset;
2889 bfd_put_8 (output_bfd, 0x66, contents + roff);
2890 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2893 else if (r_type == R_386_TLS_IE)
2897 /* IE->LE transition:
2898 Originally it can be one of:
2906 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2909 /* movl foo, %eax. */
2910 bfd_put_8 (output_bfd, 0xb8,
2911 contents + rel->r_offset - 1);
2917 type = bfd_get_8 (input_bfd,
2918 contents + rel->r_offset - 2);
2923 bfd_put_8 (output_bfd, 0xc7,
2924 contents + rel->r_offset - 2);
2925 bfd_put_8 (output_bfd,
2926 0xc0 | ((val >> 3) & 7),
2927 contents + rel->r_offset - 1);
2931 bfd_put_8 (output_bfd, 0x81,
2932 contents + rel->r_offset - 2);
2933 bfd_put_8 (output_bfd,
2934 0xc0 | ((val >> 3) & 7),
2935 contents + rel->r_offset - 1);
2942 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
2943 contents + rel->r_offset);
2948 unsigned int val, type;
2950 /* {IE_32,GOTIE}->LE transition:
2951 Originally it can be one of:
2952 subl foo(%reg1), %reg2
2953 movl foo(%reg1), %reg2
2954 addl foo(%reg1), %reg2
2957 movl $foo, %reg2 (6 byte form)
2958 addl $foo, %reg2. */
2959 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2960 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2964 bfd_put_8 (output_bfd, 0xc7,
2965 contents + rel->r_offset - 2);
2966 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2967 contents + rel->r_offset - 1);
2969 else if (type == 0x2b)
2972 bfd_put_8 (output_bfd, 0x81,
2973 contents + rel->r_offset - 2);
2974 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2975 contents + rel->r_offset - 1);
2977 else if (type == 0x03)
2980 bfd_put_8 (output_bfd, 0x81,
2981 contents + rel->r_offset - 2);
2982 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2983 contents + rel->r_offset - 1);
2987 if (r_type == R_386_TLS_GOTIE)
2988 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
2989 contents + rel->r_offset);
2991 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
2992 contents + rel->r_offset);
2997 if (htab->elf.sgot == NULL)
3002 off = h->got.offset;
3003 offplt = elf_x86_hash_entry (h)->tlsdesc_got;
3007 if (local_got_offsets == NULL)
3010 off = local_got_offsets[r_symndx];
3011 offplt = local_tlsdesc_gotents[r_symndx];
3018 Elf_Internal_Rela outrel;
3022 if (htab->elf.srelgot == NULL)
3025 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3027 if (GOT_TLS_GDESC_P (tls_type))
3030 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3031 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3032 <= htab->elf.sgotplt->size);
3033 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3034 + htab->elf.sgotplt->output_offset
3036 + htab->sgotplt_jump_table_size);
3037 sreloc = htab->elf.srelplt;
3038 loc = sreloc->contents;
3039 loc += (htab->next_tls_desc_index++
3040 * sizeof (Elf32_External_Rel));
3041 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3042 <= sreloc->contents + sreloc->size);
3043 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3046 BFD_ASSERT (! unresolved_reloc);
3047 bfd_put_32 (output_bfd,
3048 relocation - _bfd_x86_elf_dtpoff_base (info),
3049 htab->elf.sgotplt->contents + offplt
3050 + htab->sgotplt_jump_table_size + 4);
3054 bfd_put_32 (output_bfd, 0,
3055 htab->elf.sgotplt->contents + offplt
3056 + htab->sgotplt_jump_table_size + 4);
3060 sreloc = htab->elf.srelgot;
3062 outrel.r_offset = (htab->elf.sgot->output_section->vma
3063 + htab->elf.sgot->output_offset + off);
3065 if (GOT_TLS_GD_P (tls_type))
3066 dr_type = R_386_TLS_DTPMOD32;
3067 else if (GOT_TLS_GDESC_P (tls_type))
3069 else if (tls_type == GOT_TLS_IE_POS)
3070 dr_type = R_386_TLS_TPOFF;
3072 dr_type = R_386_TLS_TPOFF32;
3074 if (dr_type == R_386_TLS_TPOFF && indx == 0)
3075 bfd_put_32 (output_bfd,
3076 relocation - _bfd_x86_elf_dtpoff_base (info),
3077 htab->elf.sgot->contents + off);
3078 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3079 bfd_put_32 (output_bfd,
3080 _bfd_x86_elf_dtpoff_base (info) - relocation,
3081 htab->elf.sgot->contents + off);
3082 else if (dr_type != R_386_TLS_DESC)
3083 bfd_put_32 (output_bfd, 0,
3084 htab->elf.sgot->contents + off);
3085 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3087 elf_append_rel (output_bfd, sreloc, &outrel);
3089 if (GOT_TLS_GD_P (tls_type))
3093 BFD_ASSERT (! unresolved_reloc);
3094 bfd_put_32 (output_bfd,
3095 relocation - _bfd_x86_elf_dtpoff_base (info),
3096 htab->elf.sgot->contents + off + 4);
3100 bfd_put_32 (output_bfd, 0,
3101 htab->elf.sgot->contents + off + 4);
3102 outrel.r_info = ELF32_R_INFO (indx,
3103 R_386_TLS_DTPOFF32);
3104 outrel.r_offset += 4;
3105 elf_append_rel (output_bfd, sreloc, &outrel);
3108 else if (tls_type == GOT_TLS_IE_BOTH)
3110 bfd_put_32 (output_bfd,
3112 ? relocation - _bfd_x86_elf_dtpoff_base (info)
3114 htab->elf.sgot->contents + off + 4);
3115 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3116 outrel.r_offset += 4;
3117 elf_append_rel (output_bfd, sreloc, &outrel);
3124 local_got_offsets[r_symndx] |= 1;
3127 if (off >= (bfd_vma) -2
3128 && ! GOT_TLS_GDESC_P (tls_type))
3130 if (r_type_tls == R_386_TLS_GOTDESC
3131 || r_type_tls == R_386_TLS_DESC_CALL)
3133 relocation = htab->sgotplt_jump_table_size + offplt;
3134 unresolved_reloc = FALSE;
3136 else if (r_type_tls == r_type)
3138 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3139 + htab->elf.sgotplt->output_offset;
3140 relocation = htab->elf.sgot->output_section->vma
3141 + htab->elf.sgot->output_offset + off - g_o_t;
3142 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3143 && tls_type == GOT_TLS_IE_BOTH)
3145 if (r_type == R_386_TLS_IE)
3146 relocation += g_o_t;
3147 unresolved_reloc = FALSE;
3149 else if (r_type == R_386_TLS_GD)
3151 unsigned int val, type;
3154 /* GD->IE transition. */
3155 type = *(contents + rel->r_offset - 2);
3156 val = *(contents + rel->r_offset - 1);
3160 leal foo@tlsgd(,%ebx,1), %eax
3161 call ___tls_get_addr@PLT
3164 subl $foo@gottpoff(%ebx), %eax. */
3166 roff = rel->r_offset - 3;
3171 leal foo@tlsgd(%ebx), %eax
3172 call ___tls_get_addr@PLT
3175 leal foo@tlsgd(%reg), %eax
3176 call *___tls_get_addr@GOT(%reg)
3177 which may be converted to
3178 addr32 call ___tls_get_addr
3181 subl $foo@gottpoff(%reg), %eax. */
3182 roff = rel->r_offset - 2;
3184 memcpy (contents + roff,
3185 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3186 contents[roff + 7] = 0x80 | (val & 7);
3187 /* If foo is used only with foo@gotntpoff(%reg) and
3188 foo@indntpoff, but not with foo@gottpoff(%reg), change
3189 subl $foo@gottpoff(%reg), %eax
3191 addl $foo@gotntpoff(%reg), %eax. */
3192 if (tls_type == GOT_TLS_IE_POS)
3193 contents[roff + 6] = 0x03;
3194 bfd_put_32 (output_bfd,
3195 htab->elf.sgot->output_section->vma
3196 + htab->elf.sgot->output_offset + off
3197 - htab->elf.sgotplt->output_section->vma
3198 - htab->elf.sgotplt->output_offset,
3199 contents + roff + 8);
3200 /* Skip R_386_PLT32 and R_386_GOT32X. */
3205 else if (r_type == R_386_TLS_GOTDESC)
3207 /* GDesc -> IE transition.
3208 It's originally something like:
3209 leal x@tlsdesc(%ebx), %eax
3212 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3214 movl x@gottpoff(%ebx), %eax # before negl %eax
3216 Registers other than %eax may be set up here. */
3220 /* First, make sure it's a leal adding ebx to a 32-bit
3221 offset into any register, although it's probably
3222 almost always going to be eax. */
3223 roff = rel->r_offset;
3225 /* Now modify the instruction as appropriate. */
3226 /* To turn a leal into a movl in the form we use it, it
3227 suffices to change the first byte from 0x8d to 0x8b.
3228 aoliva FIXME: should we decide to keep the leal, all
3229 we have to do is remove the statement below, and
3230 adjust the relaxation of R_386_TLS_DESC_CALL. */
3231 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3233 if (tls_type == GOT_TLS_IE_BOTH)
3236 bfd_put_32 (output_bfd,
3237 htab->elf.sgot->output_section->vma
3238 + htab->elf.sgot->output_offset + off
3239 - htab->elf.sgotplt->output_section->vma
3240 - htab->elf.sgotplt->output_offset,
3244 else if (r_type == R_386_TLS_DESC_CALL)
3246 /* GDesc -> IE transition.
3254 depending on how we transformed the TLS_GOTDESC above.
3259 roff = rel->r_offset;
3261 /* Now modify the instruction as appropriate. */
3262 if (tls_type != GOT_TLS_IE_NEG)
3265 bfd_put_8 (output_bfd, 0x66, contents + roff);
3266 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3271 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3272 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3282 if (! elf_i386_tls_transition (info, input_bfd,
3283 input_section, contents,
3284 symtab_hdr, sym_hashes,
3285 &r_type, GOT_UNKNOWN, rel,
3286 relend, h, r_symndx, TRUE))
3289 if (r_type != R_386_TLS_LDM)
3291 /* LD->LE transition. Change
3292 leal foo@tlsldm(%ebx) %eax
3293 call ___tls_get_addr@PLT
3297 leal 0(%esi,1), %esi
3299 leal foo@tlsldm(%reg) %eax
3300 call *___tls_get_addr@GOT(%reg)
3301 which may be converted to
3302 addr32 call ___tls_get_addr
3305 leal 0(%esi), %esi */
3306 BFD_ASSERT (r_type == R_386_TLS_LE_32);
3307 if (*(contents + rel->r_offset + 4) == 0xff
3308 || *(contents + rel->r_offset + 4) == 0x67)
3309 memcpy (contents + rel->r_offset - 2,
3310 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3312 memcpy (contents + rel->r_offset - 2,
3313 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3314 /* Skip R_386_PC32/R_386_PLT32. */
3320 if (htab->elf.sgot == NULL)
3323 off = htab->tls_ld_or_ldm_got.offset;
3328 Elf_Internal_Rela outrel;
3330 if (htab->elf.srelgot == NULL)
3333 outrel.r_offset = (htab->elf.sgot->output_section->vma
3334 + htab->elf.sgot->output_offset + off);
3336 bfd_put_32 (output_bfd, 0,
3337 htab->elf.sgot->contents + off);
3338 bfd_put_32 (output_bfd, 0,
3339 htab->elf.sgot->contents + off + 4);
3340 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3341 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
3342 htab->tls_ld_or_ldm_got.offset |= 1;
3344 relocation = htab->elf.sgot->output_section->vma
3345 + htab->elf.sgot->output_offset + off
3346 - htab->elf.sgotplt->output_section->vma
3347 - htab->elf.sgotplt->output_offset;
3348 unresolved_reloc = FALSE;
3351 case R_386_TLS_LDO_32:
3352 if (!bfd_link_executable (info)
3353 || (input_section->flags & SEC_CODE) == 0)
3354 relocation -= _bfd_x86_elf_dtpoff_base (info);
3356 /* When converting LDO to LE, we must negate. */
3357 relocation = -elf_i386_tpoff (info, relocation);
3360 case R_386_TLS_LE_32:
3362 if (!bfd_link_executable (info))
3364 Elf_Internal_Rela outrel;
3367 outrel.r_offset = rel->r_offset
3368 + input_section->output_section->vma
3369 + input_section->output_offset;
3370 if (h != NULL && h->dynindx != -1)
3374 if (r_type == R_386_TLS_LE_32)
3375 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3377 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3378 sreloc = elf_section_data (input_section)->sreloc;
3381 elf_append_rel (output_bfd, sreloc, &outrel);
3384 else if (r_type == R_386_TLS_LE_32)
3385 relocation = _bfd_x86_elf_dtpoff_base (info) - relocation;
3387 relocation -= _bfd_x86_elf_dtpoff_base (info);
3389 else if (r_type == R_386_TLS_LE_32)
3390 relocation = elf_i386_tpoff (info, relocation);
3392 relocation = -elf_i386_tpoff (info, relocation);
3399 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3400 because such sections are not SEC_ALLOC and thus ld.so will
3401 not process them. */
3402 if (unresolved_reloc
3403 && !((input_section->flags & SEC_DEBUGGING) != 0
3405 && _bfd_elf_section_offset (output_bfd, info, input_section,
3406 rel->r_offset) != (bfd_vma) -1)
3409 /* xgettext:c-format */
3410 (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"),
3413 (uint64_t) rel->r_offset,
3415 h->root.root.string);
3420 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3421 contents, rel->r_offset,
3424 check_relocation_error:
3425 if (r != bfd_reloc_ok)
3430 name = h->root.root.string;
3433 name = bfd_elf_string_from_elf_section (input_bfd,
3434 symtab_hdr->sh_link,
3439 name = bfd_section_name (input_bfd, sec);
3442 if (r == bfd_reloc_overflow)
3443 (*info->callbacks->reloc_overflow)
3444 (info, (h ? &h->root : NULL), name, howto->name,
3445 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3449 /* xgettext:c-format */
3450 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3451 input_bfd, input_section,
3452 (uint64_t) rel->r_offset, name, (int) r);
3463 Elf_Internal_Shdr *rel_hdr;
3464 size_t deleted = rel - wrel;
3466 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
3467 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3468 if (rel_hdr->sh_size == 0)
3470 /* It is too late to remove an empty reloc section. Leave
3472 ??? What is wrong with an empty section??? */
3473 rel_hdr->sh_size = rel_hdr->sh_entsize;
3476 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
3477 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
3478 input_section->reloc_count -= deleted;
3484 /* Finish up dynamic symbol handling. We set the contents of various
3485 dynamic sections here. */
3488 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3489 struct bfd_link_info *info,
3490 struct elf_link_hash_entry *h,
3491 Elf_Internal_Sym *sym)
3493 struct elf_x86_link_hash_table *htab;
3494 unsigned plt_entry_size;
3495 struct elf_x86_link_hash_entry *eh;
3496 bfd_boolean local_undefweak;
3497 bfd_boolean use_plt_second;
3499 htab = elf_x86_hash_table (info, I386_ELF_DATA);
3503 plt_entry_size = htab->plt.plt_entry_size;
3505 /* Use the second PLT section only if there is .plt section. */
3506 use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL;
3508 eh = (struct elf_x86_link_hash_entry *) h;
3509 if (eh->no_finish_dynamic_symbol)
3512 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3513 resolved undefined weak symbols in executable so that their
3514 references have value 0 at run-time. */
3515 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
3517 if (h->plt.offset != (bfd_vma) -1)
3519 bfd_vma plt_index, plt_offset;
3521 Elf_Internal_Rela rel;
3523 asection *plt, *resolved_plt, *gotplt, *relplt;
3525 /* When building a static executable, use .iplt, .igot.plt and
3526 .rel.iplt sections for STT_GNU_IFUNC symbols. */
3527 if (htab->elf.splt != NULL)
3529 plt = htab->elf.splt;
3530 gotplt = htab->elf.sgotplt;
3531 relplt = htab->elf.srelplt;
3535 plt = htab->elf.iplt;
3536 gotplt = htab->elf.igotplt;
3537 relplt = htab->elf.irelplt;
3540 VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak)
3542 /* Get the index in the procedure linkage table which
3543 corresponds to this symbol. This is the index of this symbol
3544 in all the symbols for which we are making plt entries. The
3545 first entry in the procedure linkage table is reserved.
3547 Get the offset into the .got table of the entry that
3548 corresponds to this function. Each .got entry is 4 bytes.
3549 The first three are reserved.
3551 For static executables, we don't reserve anything. */
3553 if (plt == htab->elf.splt)
3555 got_offset = (h->plt.offset / plt_entry_size
3556 - htab->plt.has_plt0);
3557 got_offset = (got_offset + 3) * 4;
3561 got_offset = h->plt.offset / plt_entry_size;
3562 got_offset = got_offset * 4;
3565 /* Fill in the entry in the procedure linkage table and update
3567 memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry,
3572 const bfd_byte *plt_entry;
3573 if (bfd_link_pic (info))
3574 plt_entry = htab->non_lazy_plt->pic_plt_entry;
3576 plt_entry = htab->non_lazy_plt->plt_entry;
3577 memcpy (htab->plt_second->contents + eh->plt_second.offset,
3578 plt_entry, htab->non_lazy_plt->plt_entry_size);
3580 resolved_plt = htab->plt_second;
3581 plt_offset = eh->plt_second.offset;
3586 plt_offset = h->plt.offset;
3589 if (! bfd_link_pic (info))
3591 bfd_put_32 (output_bfd,
3592 (gotplt->output_section->vma
3593 + gotplt->output_offset
3595 resolved_plt->contents + plt_offset
3596 + htab->plt.plt_got_offset);
3598 if (htab->target_os == is_vxworks)
3600 int s, k, reloc_index;
3602 /* Create the R_386_32 relocation referencing the GOT
3603 for this PLT entry. */
3605 /* S: Current slot number (zero-based). */
3606 s = ((h->plt.offset - htab->plt.plt_entry_size)
3607 / htab->plt.plt_entry_size);
3608 /* K: Number of relocations for PLTResolve. */
3609 if (bfd_link_pic (info))
3610 k = PLTRESOLVE_RELOCS_SHLIB;
3612 k = PLTRESOLVE_RELOCS;
3613 /* Skip the PLTresolve relocations, and the relocations for
3614 the other PLT slots. */
3615 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3616 loc = (htab->srelplt2->contents + reloc_index
3617 * sizeof (Elf32_External_Rel));
3619 rel.r_offset = (plt->output_section->vma
3620 + plt->output_offset
3621 + h->plt.offset + 2),
3622 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3623 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3625 /* Create the R_386_32 relocation referencing the beginning of
3626 the PLT for this GOT entry. */
3627 rel.r_offset = (htab->elf.sgotplt->output_section->vma
3628 + htab->elf.sgotplt->output_offset
3630 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
3631 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3632 loc + sizeof (Elf32_External_Rel));
3637 bfd_put_32 (output_bfd, got_offset,
3638 resolved_plt->contents + plt_offset
3639 + htab->plt.plt_got_offset);
3642 /* Fill in the entry in the global offset table. Leave the entry
3643 as zero for undefined weak symbol in PIE. No PLT relocation
3644 against undefined weak symbol in PIE. */
3645 if (!local_undefweak)
3647 if (htab->plt.has_plt0)
3648 bfd_put_32 (output_bfd,
3649 (plt->output_section->vma
3650 + plt->output_offset
3652 + htab->lazy_plt->plt_lazy_offset),
3653 gotplt->contents + got_offset);
3655 /* Fill in the entry in the .rel.plt section. */
3656 rel.r_offset = (gotplt->output_section->vma
3657 + gotplt->output_offset
3659 if (PLT_LOCAL_IFUNC_P (info, h))
3661 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
3662 h->root.root.string,
3663 h->root.u.def.section->owner);
3665 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3666 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
3667 in the .got.plt section. */
3668 bfd_put_32 (output_bfd,
3669 (h->root.u.def.value
3670 + h->root.u.def.section->output_section->vma
3671 + h->root.u.def.section->output_offset),
3672 gotplt->contents + got_offset);
3673 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3674 /* R_386_IRELATIVE comes last. */
3675 plt_index = htab->next_irelative_index--;
3679 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3680 plt_index = htab->next_jump_slot_index++;
3683 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
3684 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3686 /* Don't fill the second and third slots in PLT entry for
3687 static executables nor without PLT0. */
3688 if (plt == htab->elf.splt && htab->plt.has_plt0)
3690 bfd_put_32 (output_bfd,
3691 plt_index * sizeof (Elf32_External_Rel),
3692 plt->contents + h->plt.offset
3693 + htab->lazy_plt->plt_reloc_offset);
3694 bfd_put_32 (output_bfd,
3696 + htab->lazy_plt->plt_plt_offset + 4),
3697 (plt->contents + h->plt.offset
3698 + htab->lazy_plt->plt_plt_offset));
3702 else if (eh->plt_got.offset != (bfd_vma) -1)
3704 bfd_vma got_offset, plt_offset;
3705 asection *plt, *got, *gotplt;
3706 const bfd_byte *got_plt_entry;
3708 /* Set the entry in the GOT procedure linkage table. */
3709 plt = htab->plt_got;
3710 got = htab->elf.sgot;
3711 gotplt = htab->elf.sgotplt;
3712 got_offset = h->got.offset;
3714 if (got_offset == (bfd_vma) -1
3720 /* Fill in the entry in the GOT procedure linkage table. */
3721 if (! bfd_link_pic (info))
3723 got_plt_entry = htab->non_lazy_plt->plt_entry;
3724 got_offset += got->output_section->vma + got->output_offset;
3728 got_plt_entry = htab->non_lazy_plt->pic_plt_entry;
3729 got_offset += (got->output_section->vma
3730 + got->output_offset
3731 - gotplt->output_section->vma
3732 - gotplt->output_offset);
3735 plt_offset = eh->plt_got.offset;
3736 memcpy (plt->contents + plt_offset, got_plt_entry,
3737 htab->non_lazy_plt->plt_entry_size);
3738 bfd_put_32 (output_bfd, got_offset,
3739 (plt->contents + plt_offset
3740 + htab->non_lazy_plt->plt_got_offset));
3743 if (!local_undefweak
3745 && (h->plt.offset != (bfd_vma) -1
3746 || eh->plt_got.offset != (bfd_vma) -1))
3748 /* Mark the symbol as undefined, rather than as defined in
3749 the .plt section. Leave the value if there were any
3750 relocations where pointer equality matters (this is a clue
3751 for the dynamic linker, to make function pointer
3752 comparisons work between an application and shared
3753 library), otherwise set it to zero. If a function is only
3754 called from a binary, there is no need to slow down
3755 shared libraries because of that. */
3756 sym->st_shndx = SHN_UNDEF;
3757 if (!h->pointer_equality_needed)
3761 _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym);
3763 /* Don't generate dynamic GOT relocation against undefined weak
3764 symbol in executable. */
3765 if (h->got.offset != (bfd_vma) -1
3766 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type)
3767 && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
3768 && !local_undefweak)
3770 Elf_Internal_Rela rel;
3771 asection *relgot = htab->elf.srelgot;
3773 /* This symbol has an entry in the global offset table. Set it
3776 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3779 rel.r_offset = (htab->elf.sgot->output_section->vma
3780 + htab->elf.sgot->output_offset
3781 + (h->got.offset & ~(bfd_vma) 1));
3783 /* If this is a static link, or it is a -Bsymbolic link and the
3784 symbol is defined locally or was forced to be local because
3785 of a version file, we just want to emit a RELATIVE reloc.
3786 The entry in the global offset table will already have been
3787 initialized in the relocate_section function. */
3789 && h->type == STT_GNU_IFUNC)
3791 if (h->plt.offset == (bfd_vma) -1)
3793 /* STT_GNU_IFUNC is referenced without PLT. */
3794 if (htab->elf.splt == NULL)
3796 /* use .rel[a].iplt section to store .got relocations
3797 in static executable. */
3798 relgot = htab->elf.irelplt;
3800 if (SYMBOL_REFERENCES_LOCAL_P (info, h))
3802 info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"),
3803 h->root.root.string,
3804 h->root.u.def.section->owner);
3806 bfd_put_32 (output_bfd,
3807 (h->root.u.def.value
3808 + h->root.u.def.section->output_section->vma
3809 + h->root.u.def.section->output_offset),
3810 htab->elf.sgot->contents + h->got.offset);
3811 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3816 else if (bfd_link_pic (info))
3818 /* Generate R_386_GLOB_DAT. */
3826 if (!h->pointer_equality_needed)
3829 /* For non-shared object, we can't use .got.plt, which
3830 contains the real function addres if we need pointer
3831 equality. We load the GOT entry with the PLT entry. */
3832 if (htab->plt_second != NULL)
3834 plt = htab->plt_second;
3835 plt_offset = eh->plt_second.offset;
3839 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
3840 plt_offset = h->plt.offset;
3842 bfd_put_32 (output_bfd,
3843 (plt->output_section->vma
3844 + plt->output_offset + plt_offset),
3845 htab->elf.sgot->contents + h->got.offset);
3849 else if (bfd_link_pic (info)
3850 && SYMBOL_REFERENCES_LOCAL_P (info, h))
3852 BFD_ASSERT((h->got.offset & 1) != 0);
3853 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3857 BFD_ASSERT((h->got.offset & 1) == 0);
3859 bfd_put_32 (output_bfd, (bfd_vma) 0,
3860 htab->elf.sgot->contents + h->got.offset);
3861 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3864 elf_append_rel (output_bfd, relgot, &rel);
3869 Elf_Internal_Rela rel;
3872 /* This symbol needs a copy reloc. Set it up. */
3873 VERIFY_COPY_RELOC (h, htab)
3875 rel.r_offset = (h->root.u.def.value
3876 + h->root.u.def.section->output_section->vma
3877 + h->root.u.def.section->output_offset);
3878 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3879 if (h->root.u.def.section == htab->elf.sdynrelro)
3880 s = htab->elf.sreldynrelro;
3882 s = htab->elf.srelbss;
3883 elf_append_rel (output_bfd, s, &rel);
3889 /* Finish up local dynamic symbol handling. We set the contents of
3890 various dynamic sections here. */
3893 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
3895 struct elf_link_hash_entry *h
3896 = (struct elf_link_hash_entry *) *slot;
3897 struct bfd_link_info *info
3898 = (struct bfd_link_info *) inf;
3900 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
3904 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
3905 here since undefined weak symbol may not be dynamic and may not be
3906 called for elf_i386_finish_dynamic_symbol. */
3909 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
3912 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
3913 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3915 if (h->root.type != bfd_link_hash_undefweak
3916 || h->dynindx != -1)
3919 return elf_i386_finish_dynamic_symbol (info->output_bfd,
3923 /* Used to decide how to sort relocs in an optimal manner for the
3924 dynamic linker, before writing them out. */
3926 static enum elf_reloc_type_class
3927 elf_i386_reloc_type_class (const struct bfd_link_info *info,
3928 const asection *rel_sec ATTRIBUTE_UNUSED,
3929 const Elf_Internal_Rela *rela)
3931 bfd *abfd = info->output_bfd;
3932 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3933 struct elf_link_hash_table *htab = elf_hash_table (info);
3935 if (htab->dynsym != NULL
3936 && htab->dynsym->contents != NULL)
3938 /* Check relocation against STT_GNU_IFUNC symbol if there are
3940 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
3941 if (r_symndx != STN_UNDEF)
3943 Elf_Internal_Sym sym;
3944 if (!bed->s->swap_symbol_in (abfd,
3945 (htab->dynsym->contents
3946 + r_symndx * sizeof (Elf32_External_Sym)),
3950 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3951 return reloc_class_ifunc;
3955 switch (ELF32_R_TYPE (rela->r_info))
3957 case R_386_IRELATIVE:
3958 return reloc_class_ifunc;
3959 case R_386_RELATIVE:
3960 return reloc_class_relative;
3961 case R_386_JUMP_SLOT:
3962 return reloc_class_plt;
3964 return reloc_class_copy;
3966 return reloc_class_normal;
3970 /* Finish up the dynamic sections. */
3973 elf_i386_finish_dynamic_sections (bfd *output_bfd,
3974 struct bfd_link_info *info)
3976 struct elf_x86_link_hash_table *htab;
3978 htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info);
3982 if (!htab->elf.dynamic_sections_created)
3985 if (htab->elf.splt && htab->elf.splt->size > 0)
3987 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3988 really seem like the right value. */
3989 elf_section_data (htab->elf.splt->output_section)
3990 ->this_hdr.sh_entsize = 4;
3992 if (htab->plt.has_plt0)
3994 /* Fill in the special first entry in the procedure linkage
3996 memcpy (htab->elf.splt->contents, htab->plt.plt0_entry,
3997 htab->lazy_plt->plt0_entry_size);
3998 memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size,
3999 htab->plt0_pad_byte,
4000 htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size);
4001 if (!bfd_link_pic (info))
4003 bfd_put_32 (output_bfd,
4004 (htab->elf.sgotplt->output_section->vma
4005 + htab->elf.sgotplt->output_offset
4007 htab->elf.splt->contents
4008 + htab->lazy_plt->plt0_got1_offset);
4009 bfd_put_32 (output_bfd,
4010 (htab->elf.sgotplt->output_section->vma
4011 + htab->elf.sgotplt->output_offset
4013 htab->elf.splt->contents
4014 + htab->lazy_plt->plt0_got2_offset);
4016 if (htab->target_os == is_vxworks)
4018 Elf_Internal_Rela rel;
4019 int num_plts = (htab->elf.splt->size
4020 / htab->plt.plt_entry_size) - 1;
4022 asection *srelplt2 = htab->srelplt2;
4024 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4025 + 4. On IA32 we use REL relocations so the
4026 addend goes in the PLT directly. */
4027 rel.r_offset = (htab->elf.splt->output_section->vma
4028 + htab->elf.splt->output_offset
4029 + htab->lazy_plt->plt0_got1_offset);
4030 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4032 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4033 srelplt2->contents);
4034 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4036 rel.r_offset = (htab->elf.splt->output_section->vma
4037 + htab->elf.splt->output_offset
4038 + htab->lazy_plt->plt0_got2_offset);
4039 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4041 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4042 srelplt2->contents +
4043 sizeof (Elf32_External_Rel));
4044 /* Correct the .rel.plt.unloaded relocations. */
4045 p = srelplt2->contents;
4046 if (bfd_link_pic (info))
4047 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4049 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4051 for (; num_plts; num_plts--)
4053 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4054 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
4056 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4057 p += sizeof (Elf32_External_Rel);
4059 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4060 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
4062 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4063 p += sizeof (Elf32_External_Rel);
4070 /* Fill PLT entries for undefined weak symbols in PIE. */
4071 if (bfd_link_pie (info))
4072 bfd_hash_traverse (&info->hash->table,
4073 elf_i386_pie_finish_undefweak_symbol,
4079 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4080 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4081 It has to be done before elf_link_sort_relocs is called so that
4082 dynamic relocations are properly sorted. */
4085 elf_i386_output_arch_local_syms
4086 (bfd *output_bfd ATTRIBUTE_UNUSED,
4087 struct bfd_link_info *info,
4088 void *flaginfo ATTRIBUTE_UNUSED,
4089 int (*func) (void *, const char *,
4092 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
4094 struct elf_x86_link_hash_table *htab
4095 = elf_x86_hash_table (info, I386_ELF_DATA);
4099 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4100 htab_traverse (htab->loc_hash_table,
4101 elf_i386_finish_local_dynamic_symbol,
4107 /* Forward declaration. */
4108 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt;
4110 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4111 dynamic relocations. */
4114 elf_i386_get_synthetic_symtab (bfd *abfd,
4115 long symcount ATTRIBUTE_UNUSED,
4116 asymbol **syms ATTRIBUTE_UNUSED,
4123 bfd_byte *plt_contents;
4125 const struct elf_x86_lazy_plt_layout *lazy_plt;
4126 const struct elf_x86_non_lazy_plt_layout *non_lazy_plt;
4127 const struct elf_x86_lazy_plt_layout *lazy_ibt_plt;
4128 const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt;
4131 enum elf_x86_plt_type plt_type;
4132 struct elf_x86_plt plts[] =
4134 { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 },
4135 { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 },
4136 { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 },
4137 { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }
4142 if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0)
4145 if (dynsymcount <= 0)
4148 relsize = bfd_get_dynamic_reloc_upper_bound (abfd);
4152 non_lazy_plt = NULL;
4153 /* Silence GCC 6. */
4155 non_lazy_ibt_plt = NULL;
4156 lazy_ibt_plt = NULL;
4157 switch (get_elf_x86_backend_data (abfd)->target_os)
4161 non_lazy_plt = &elf_i386_non_lazy_plt;
4162 lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4163 non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4166 lazy_plt = &elf_i386_lazy_plt;
4169 lazy_plt = &elf_i386_nacl_plt;
4176 for (j = 0; plts[j].name != NULL; j++)
4178 plt = bfd_get_section_by_name (abfd, plts[j].name);
4179 if (plt == NULL || plt->size == 0)
4182 /* Get the PLT section contents. */
4183 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4184 if (plt_contents == NULL)
4186 if (!bfd_get_section_contents (abfd, (asection *) plt,
4187 plt_contents, 0, plt->size))
4189 free (plt_contents);
4193 /* Check what kind of PLT it is. */
4194 plt_type = plt_unknown;
4195 if (plts[j].type == plt_unknown
4196 && (plt->size >= (lazy_plt->plt0_entry_size
4197 + lazy_plt->plt_entry_size)))
4199 /* Match lazy PLT first. */
4200 if (memcmp (plt_contents, lazy_plt->plt0_entry,
4201 lazy_plt->plt0_got1_offset) == 0)
4203 /* The fist entry in the lazy IBT PLT is the same as the
4205 if (lazy_ibt_plt != NULL
4206 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
4207 lazy_ibt_plt->plt_entry,
4208 lazy_ibt_plt->plt_got_offset) == 0))
4209 plt_type = plt_lazy | plt_second;
4211 plt_type = plt_lazy;
4213 else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry,
4214 lazy_plt->plt0_got1_offset) == 0)
4216 /* The fist entry in the PIC lazy IBT PLT is the same as
4217 the normal PIC lazy PLT. */
4218 if (lazy_ibt_plt != NULL
4219 && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size,
4220 lazy_ibt_plt->pic_plt_entry,
4221 lazy_ibt_plt->plt_got_offset) == 0))
4222 plt_type = plt_lazy | plt_pic | plt_second;
4224 plt_type = plt_lazy | plt_pic;
4228 if (non_lazy_plt != NULL
4229 && (plt_type == plt_unknown || plt_type == plt_non_lazy)
4230 && plt->size >= non_lazy_plt->plt_entry_size)
4232 /* Match non-lazy PLT. */
4233 if (memcmp (plt_contents, non_lazy_plt->plt_entry,
4234 non_lazy_plt->plt_got_offset) == 0)
4235 plt_type = plt_non_lazy;
4236 else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry,
4237 non_lazy_plt->plt_got_offset) == 0)
4241 if ((non_lazy_ibt_plt != NULL)
4242 && (plt_type == plt_unknown || plt_type == plt_second)
4243 && plt->size >= non_lazy_ibt_plt->plt_entry_size)
4245 if (memcmp (plt_contents,
4246 non_lazy_ibt_plt->plt_entry,
4247 non_lazy_ibt_plt->plt_got_offset) == 0)
4249 /* Match IBT PLT. */
4250 plt_type = plt_second;
4251 non_lazy_plt = non_lazy_ibt_plt;
4253 else if (memcmp (plt_contents,
4254 non_lazy_ibt_plt->pic_plt_entry,
4255 non_lazy_ibt_plt->plt_got_offset) == 0)
4257 /* Match PIC IBT PLT. */
4258 plt_type = plt_second | plt_pic;
4259 non_lazy_plt = non_lazy_ibt_plt;
4263 if (plt_type == plt_unknown)
4265 free (plt_contents);
4270 plts[j].type = plt_type;
4272 if ((plt_type & plt_lazy))
4274 plts[j].plt_got_offset = lazy_plt->plt_got_offset;
4275 plts[j].plt_entry_size = lazy_plt->plt_entry_size;
4276 /* Skip PLT0 in lazy PLT. */
4281 plts[j].plt_got_offset = non_lazy_plt->plt_got_offset;
4282 plts[j].plt_entry_size = non_lazy_plt->plt_entry_size;
4286 /* Skip lazy PLT when the second PLT is used. */
4287 if ((plt_type & (plt_lazy | plt_second))
4288 == (plt_lazy | plt_second))
4292 n = plt->size / plts[j].plt_entry_size;
4297 plts[j].contents = plt_contents;
4299 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
4300 if ((plt_type & plt_pic))
4301 got_addr = (bfd_vma) -1;
4304 return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize,
4305 got_addr, plts, dynsyms,
4309 /* Set up i386 GNU properties. Return the first relocatable ELF input
4310 with GNU properties if found. Otherwise, return NULL. */
4313 elf_i386_link_setup_gnu_properties (struct bfd_link_info *info)
4315 struct elf_x86_init_table init_table;
4317 switch (get_elf_x86_backend_data (info->output_bfd)->target_os)
4321 init_table.plt0_pad_byte = 0x0;
4322 init_table.lazy_plt = &elf_i386_lazy_plt;
4323 init_table.non_lazy_plt = &elf_i386_non_lazy_plt;
4324 init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt;
4325 init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt;
4328 init_table.plt0_pad_byte = 0x90;
4329 init_table.lazy_plt = &elf_i386_lazy_plt;
4330 init_table.non_lazy_plt = NULL;
4331 init_table.lazy_ibt_plt = NULL;
4332 init_table.non_lazy_ibt_plt = NULL;
4335 init_table.plt0_pad_byte = 0x90;
4336 init_table.lazy_plt = &elf_i386_nacl_plt;
4337 init_table.non_lazy_plt = NULL;
4338 init_table.lazy_ibt_plt = NULL;
4339 init_table.non_lazy_ibt_plt = NULL;
4343 init_table.r_info = elf32_r_info;
4344 init_table.r_sym = elf32_r_sym;
4346 return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table);
4349 #define TARGET_LITTLE_SYM i386_elf32_vec
4350 #define TARGET_LITTLE_NAME "elf32-i386"
4351 #define ELF_ARCH bfd_arch_i386
4352 #define ELF_TARGET_ID I386_ELF_DATA
4353 #define ELF_MACHINE_CODE EM_386
4354 #define ELF_MAXPAGESIZE 0x1000
4356 #define elf_backend_can_gc_sections 1
4357 #define elf_backend_can_refcount 1
4358 #define elf_backend_want_got_plt 1
4359 #define elf_backend_plt_readonly 1
4360 #define elf_backend_want_plt_sym 0
4361 #define elf_backend_got_header_size 12
4362 #define elf_backend_plt_alignment 4
4363 #define elf_backend_dtrel_excludes_plt 1
4364 #define elf_backend_extern_protected_data 1
4365 #define elf_backend_caches_rawsize 1
4366 #define elf_backend_want_dynrelro 1
4368 /* Support RELA for objdump of prelink objects. */
4369 #define elf_info_to_howto elf_i386_info_to_howto_rel
4370 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4372 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4373 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4374 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4375 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
4377 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4378 #define elf_backend_check_relocs elf_i386_check_relocs
4379 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4380 #define elf_backend_fake_sections elf_i386_fake_sections
4381 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4382 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4383 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
4384 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4385 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4386 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4387 #define elf_backend_relocate_section elf_i386_relocate_section
4388 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
4389 #define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol
4391 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4393 #define elf32_bed elf32_i386_bed
4395 #include "elf32-target.h"
4397 /* FreeBSD support. */
4399 #undef TARGET_LITTLE_SYM
4400 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
4401 #undef TARGET_LITTLE_NAME
4402 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4404 #define ELF_OSABI ELFOSABI_FREEBSD
4406 /* The kernel recognizes executables as valid only if they carry a
4407 "FreeBSD" label in the ELF header. So we put this label on all
4408 executables and (for simplicity) also all other object files. */
4411 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
4413 _bfd_elf_post_process_headers (abfd, info);
4415 #ifdef OLD_FREEBSD_ABI_LABEL
4417 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4418 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4419 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4424 #undef elf_backend_post_process_headers
4425 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4427 #define elf32_bed elf32_i386_fbsd_bed
4429 #undef elf_backend_add_symbol_hook
4431 #include "elf32-target.h"
4435 #undef TARGET_LITTLE_SYM
4436 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
4437 #undef TARGET_LITTLE_NAME
4438 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
4440 static const struct elf_x86_backend_data elf_i386_solaris_arch_bed =
4445 #undef elf_backend_arch_data
4446 #define elf_backend_arch_data &elf_i386_solaris_arch_bed
4448 #undef elf_backend_post_process_headers
4450 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4451 objects won't be recognized. */
4455 #define elf32_bed elf32_i386_sol2_bed
4457 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4459 #undef elf_backend_static_tls_alignment
4460 #define elf_backend_static_tls_alignment 8
4462 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4464 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4466 #undef elf_backend_want_plt_sym
4467 #define elf_backend_want_plt_sym 1
4469 #undef elf_backend_strtab_flags
4470 #define elf_backend_strtab_flags SHF_STRINGS
4472 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
4473 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
4474 FALSE otherwise. ISECTION is the best guess matching section from the
4475 input bfd IBFD, but it might be NULL. */
4478 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
4479 bfd *obfd ATTRIBUTE_UNUSED,
4480 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
4481 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
4483 /* PR 19938: FIXME: Need to add code for setting the sh_info
4484 and sh_link fields of Solaris specific section types. */
4487 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
4488 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
4490 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4492 The following values should be set:
4495 -----------------------------------------------------------------------------
4496 SHT_SUNW_ancillary The section header index of 0
4497 [0x6fffffee] the associated string table.
4499 SHT_SUNW_capinfo The section header index of For a dynamic object, the
4500 [0x6ffffff0] the associated symbol table. section header index of
4502 SHT_SUNW_capchain table,
4505 SHT_SUNW_symsort The section header index of 0
4506 [0x6ffffff1] the associated symbol table.
4508 SHT_SUNW_tlssort The section header index of 0
4509 [0x6ffffff2] the associated symbol table.
4511 SHT_SUNW_LDYNSYM The section header index of One greater than the
4512 [0x6ffffff3] the associated string table. symbol table index of the
4513 This index is the same string last local symbol,
4514 table used by the SHT_DYNSYM STB_LOCAL. Since
4515 section. SHT_SUNW_LDYNSYM only
4516 contains local symbols,
4517 sh_info is equivalent to
4518 the number of symbols in
4521 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
4522 [0x6ffffff5] the section header index of to named strings, the
4523 the associated section header index of
4524 SHT_SUNW_capinfo table, the associated string
4525 otherwise 0. table, otherwise 0.
4527 SHT_SUNW_move The section header index of 0
4528 [0x6ffffffa] the associated symbol table.
4533 SHT_SUNW_syminfo The section header index of The section header index
4534 [0x6ffffffc] the associated symbol table. of the associated
4537 SHT_SUNW_verdef The section header index of The number of version
4538 [0x6ffffffd] the associated string table. definitions within the
4541 SHT_SUNW_verneed The section header index of The number of version
4542 [0x6ffffffe] the associated string table. dependencies within the
4545 SHT_SUNW_versym The section header index of 0
4546 [0x6fffffff] the associated symbol table. */
4549 #undef elf_backend_copy_special_section_fields
4550 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
4552 #include "elf32-target.h"
4554 /* Intel MCU support. */
4557 elf32_iamcu_elf_object_p (bfd *abfd)
4559 /* Set the right machine number for an IAMCU elf32 file. */
4560 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
4564 #undef TARGET_LITTLE_SYM
4565 #define TARGET_LITTLE_SYM iamcu_elf32_vec
4566 #undef TARGET_LITTLE_NAME
4567 #define TARGET_LITTLE_NAME "elf32-iamcu"
4569 #define ELF_ARCH bfd_arch_iamcu
4571 #undef ELF_MACHINE_CODE
4572 #define ELF_MACHINE_CODE EM_IAMCU
4574 #undef elf_backend_arch_data
4575 #define elf_backend_arch_data &elf_i386_arch_bed
4580 #define elf32_bed elf32_iamcu_bed
4582 #undef elf_backend_object_p
4583 #define elf_backend_object_p elf32_iamcu_elf_object_p
4585 #undef elf_backend_static_tls_alignment
4587 #undef elf_backend_want_plt_sym
4588 #define elf_backend_want_plt_sym 0
4590 #undef elf_backend_strtab_flags
4591 #undef elf_backend_copy_special_section_fields
4593 #include "elf32-target.h"
4595 /* Restore defaults. */
4597 #define ELF_ARCH bfd_arch_i386
4598 #undef ELF_MACHINE_CODE
4599 #define ELF_MACHINE_CODE EM_386
4601 /* Native Client support. */
4603 #undef TARGET_LITTLE_SYM
4604 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
4605 #undef TARGET_LITTLE_NAME
4606 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
4608 #define elf32_bed elf32_i386_nacl_bed
4610 #undef ELF_MAXPAGESIZE
4611 #define ELF_MAXPAGESIZE 0x10000
4613 /* Restore defaults. */
4615 #undef elf_backend_want_plt_sym
4616 #define elf_backend_want_plt_sym 0
4617 #undef elf_backend_post_process_headers
4618 #undef elf_backend_static_tls_alignment
4620 /* NaCl uses substantially different PLT entries for the same effects. */
4622 #undef elf_backend_plt_alignment
4623 #define elf_backend_plt_alignment 5
4624 #define NACL_PLT_ENTRY_SIZE 64
4625 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
4627 static const bfd_byte elf_i386_nacl_plt0_entry[] =
4629 0xff, 0x35, /* pushl contents of address */
4630 0, 0, 0, 0, /* replaced with address of .got + 4. */
4631 0x8b, 0x0d, /* movl contents of address, %ecx */
4632 0, 0, 0, 0, /* replaced with address of .got + 8. */
4633 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4634 0xff, 0xe1 /* jmp *%ecx */
4637 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
4639 0x8b, 0x0d, /* movl contents of address, %ecx */
4640 0, 0, 0, 0, /* replaced with GOT slot address. */
4641 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
4642 0xff, 0xe1, /* jmp *%ecx */
4644 /* Pad to the next 32-byte boundary with nop instructions. */
4646 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4647 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4649 /* Lazy GOT entries point here (32-byte aligned). */
4650 0x68, /* pushl immediate */
4651 0, 0, 0, 0, /* replaced with reloc offset. */
4652 0xe9, /* jmp relative */
4653 0, 0, 0, 0, /* replaced with offset to .plt. */
4655 /* Pad to the next 32-byte boundary with nop instructions. */
4656 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4657 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4661 static const bfd_byte
4662 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
4664 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
4665 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
4666 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
4667 0xff, 0xe1, /* jmp *%ecx */
4669 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
4670 so pad to that size with nop instructions. */
4671 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
4674 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
4676 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
4677 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
4678 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
4679 0xff, 0xe1, /* jmp *%ecx */
4681 /* Pad to the next 32-byte boundary with nop instructions. */
4683 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4684 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4686 /* Lazy GOT entries point here (32-byte aligned). */
4687 0x68, /* pushl immediate */
4688 0, 0, 0, 0, /* replaced with offset into relocation table. */
4689 0xe9, /* jmp relative */
4690 0, 0, 0, 0, /* replaced with offset to start of .plt. */
4692 /* Pad to the next 32-byte boundary with nop instructions. */
4693 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4694 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4698 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
4700 #if (PLT_CIE_LENGTH != 20 \
4701 || PLT_FDE_LENGTH != 36 \
4702 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
4703 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
4704 # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!"
4706 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
4707 0, 0, 0, 0, /* CIE ID */
4708 1, /* CIE version */
4709 'z', 'R', 0, /* Augmentation string */
4710 1, /* Code alignment factor */
4711 0x7c, /* Data alignment factor: -4 */
4712 8, /* Return address column */
4713 1, /* Augmentation size */
4714 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
4715 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
4716 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
4717 DW_CFA_nop, DW_CFA_nop,
4719 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
4720 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
4721 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
4722 0, 0, 0, 0, /* .plt size goes here */
4723 0, /* Augmentation size */
4724 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
4725 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
4726 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
4727 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
4728 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
4729 13, /* Block length */
4730 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
4731 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
4732 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
4733 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
4734 DW_CFA_nop, DW_CFA_nop
4737 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt =
4739 elf_i386_nacl_plt0_entry, /* plt0_entry */
4740 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
4741 elf_i386_nacl_plt_entry, /* plt_entry */
4742 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
4743 NULL, /* plt_tlsdesc_entry */
4744 0, /* plt_tlsdesc_entry_size*/
4745 0, /* plt_tlsdesc_got1_offset */
4746 0, /* plt_tlsdesc_got2_offset */
4747 0, /* plt_tlsdesc_got1_insn_end */
4748 0, /* plt_tlsdesc_got2_insn_end */
4749 2, /* plt0_got1_offset */
4750 8, /* plt0_got2_offset */
4751 0, /* plt0_got2_insn_end */
4752 2, /* plt_got_offset */
4753 33, /* plt_reloc_offset */
4754 38, /* plt_plt_offset */
4755 0, /* plt_got_insn_size */
4756 0, /* plt_plt_insn_end */
4757 32, /* plt_lazy_offset */
4758 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
4759 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
4760 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
4761 sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */
4764 static const struct elf_x86_backend_data elf_i386_nacl_arch_bed =
4770 elf32_i386_nacl_elf_object_p (bfd *abfd)
4772 /* Set the right machine number for a NaCl i386 ELF32 file. */
4773 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
4777 #undef elf_backend_arch_data
4778 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
4780 #undef elf_backend_object_p
4781 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
4782 #undef elf_backend_modify_segment_map
4783 #define elf_backend_modify_segment_map nacl_modify_segment_map
4784 #undef elf_backend_modify_program_headers
4785 #define elf_backend_modify_program_headers nacl_modify_program_headers
4786 #undef elf_backend_final_write_processing
4787 #define elf_backend_final_write_processing nacl_final_write_processing
4789 #include "elf32-target.h"
4791 /* Restore defaults. */
4792 #undef elf_backend_object_p
4793 #undef elf_backend_modify_segment_map
4794 #undef elf_backend_modify_program_headers
4795 #undef elf_backend_final_write_processing
4797 /* VxWorks support. */
4799 #undef TARGET_LITTLE_SYM
4800 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
4801 #undef TARGET_LITTLE_NAME
4802 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4804 #undef ELF_MAXPAGESIZE
4805 #define ELF_MAXPAGESIZE 0x1000
4806 #undef elf_backend_plt_alignment
4807 #define elf_backend_plt_alignment 4
4809 static const struct elf_x86_backend_data elf_i386_vxworks_arch_bed =
4814 #undef elf_backend_arch_data
4815 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
4817 #undef elf_backend_relocs_compatible
4818 #undef elf_backend_add_symbol_hook
4819 #define elf_backend_add_symbol_hook \
4820 elf_vxworks_add_symbol_hook
4821 #undef elf_backend_link_output_symbol_hook
4822 #define elf_backend_link_output_symbol_hook \
4823 elf_vxworks_link_output_symbol_hook
4824 #undef elf_backend_emit_relocs
4825 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4826 #undef elf_backend_final_write_processing
4827 #define elf_backend_final_write_processing \
4828 elf_vxworks_final_write_processing
4829 #undef elf_backend_static_tls_alignment
4831 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4833 #undef elf_backend_want_plt_sym
4834 #define elf_backend_want_plt_sym 1
4837 #define elf32_bed elf32_i386_vxworks_bed
4839 #include "elf32-target.h"