1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2015 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
33 /* 386 uses REL relocations instead of RELA. */
38 static reloc_howto_type elf_howto_table[]=
40 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
41 bfd_elf_generic_reloc, "R_386_NONE",
42 TRUE, 0x00000000, 0x00000000, FALSE),
43 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
44 bfd_elf_generic_reloc, "R_386_32",
45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
47 bfd_elf_generic_reloc, "R_386_PC32",
48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
50 bfd_elf_generic_reloc, "R_386_GOT32",
51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
53 bfd_elf_generic_reloc, "R_386_PLT32",
54 TRUE, 0xffffffff, 0xffffffff, TRUE),
55 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_386_COPY",
57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_386_RELATIVE",
66 TRUE, 0xffffffff, 0xffffffff, FALSE),
67 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_386_GOTOFF",
69 TRUE, 0xffffffff, 0xffffffff, FALSE),
70 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_386_GOTPC",
72 TRUE, 0xffffffff, 0xffffffff, TRUE),
74 /* We have a gap in the reloc numbers here.
75 R_386_standard counts the number up to this point, and
76 R_386_ext_offset is the value to subtract from a reloc type of
77 R_386_16 thru R_386_PC8 to form an index into this table. */
78 #define R_386_standard (R_386_GOTPC + 1)
79 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
81 /* These relocs are a GNU extension. */
82 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_386_TLS_IE",
87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_386_TLS_LE",
93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_386_TLS_GD",
96 TRUE, 0xffffffff, 0xffffffff, FALSE),
97 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_386_TLS_LDM",
99 TRUE, 0xffffffff, 0xffffffff, FALSE),
100 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_386_16",
102 TRUE, 0xffff, 0xffff, FALSE),
103 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_386_PC16",
105 TRUE, 0xffff, 0xffff, TRUE),
106 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_386_8",
108 TRUE, 0xff, 0xff, FALSE),
109 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
110 bfd_elf_generic_reloc, "R_386_PC8",
111 TRUE, 0xff, 0xff, TRUE),
113 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
114 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
115 /* These are common with Solaris TLS implementation. */
116 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
127 TRUE, 0xffffffff, 0xffffffff, FALSE),
128 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
131 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
133 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
135 bfd_elf_generic_reloc, "R_386_SIZE32",
136 TRUE, 0xffffffff, 0xffffffff, FALSE),
137 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
140 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
143 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_TLS_DESC",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
146 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_386_IRELATIVE",
148 TRUE, 0xffffffff, 0xffffffff, FALSE),
151 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
152 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
154 /* GNU extension to record C++ vtable hierarchy. */
155 HOWTO (R_386_GNU_VTINHERIT, /* type */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
159 FALSE, /* pc_relative */
161 complain_overflow_dont, /* complain_on_overflow */
162 NULL, /* special_function */
163 "R_386_GNU_VTINHERIT", /* name */
164 FALSE, /* partial_inplace */
167 FALSE), /* pcrel_offset */
169 /* GNU extension to record C++ vtable member usage. */
170 HOWTO (R_386_GNU_VTENTRY, /* type */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
174 FALSE, /* pc_relative */
176 complain_overflow_dont, /* complain_on_overflow */
177 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
178 "R_386_GNU_VTENTRY", /* name */
179 FALSE, /* partial_inplace */
182 FALSE) /* pcrel_offset */
184 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
188 #ifdef DEBUG_GEN_RELOC
190 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
195 static reloc_howto_type *
196 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
197 bfd_reloc_code_real_type code)
202 TRACE ("BFD_RELOC_NONE");
203 return &elf_howto_table[R_386_NONE];
206 TRACE ("BFD_RELOC_32");
207 return &elf_howto_table[R_386_32];
210 TRACE ("BFD_RELOC_CTOR");
211 return &elf_howto_table[R_386_32];
213 case BFD_RELOC_32_PCREL:
214 TRACE ("BFD_RELOC_PC32");
215 return &elf_howto_table[R_386_PC32];
217 case BFD_RELOC_386_GOT32:
218 TRACE ("BFD_RELOC_386_GOT32");
219 return &elf_howto_table[R_386_GOT32];
221 case BFD_RELOC_386_PLT32:
222 TRACE ("BFD_RELOC_386_PLT32");
223 return &elf_howto_table[R_386_PLT32];
225 case BFD_RELOC_386_COPY:
226 TRACE ("BFD_RELOC_386_COPY");
227 return &elf_howto_table[R_386_COPY];
229 case BFD_RELOC_386_GLOB_DAT:
230 TRACE ("BFD_RELOC_386_GLOB_DAT");
231 return &elf_howto_table[R_386_GLOB_DAT];
233 case BFD_RELOC_386_JUMP_SLOT:
234 TRACE ("BFD_RELOC_386_JUMP_SLOT");
235 return &elf_howto_table[R_386_JUMP_SLOT];
237 case BFD_RELOC_386_RELATIVE:
238 TRACE ("BFD_RELOC_386_RELATIVE");
239 return &elf_howto_table[R_386_RELATIVE];
241 case BFD_RELOC_386_GOTOFF:
242 TRACE ("BFD_RELOC_386_GOTOFF");
243 return &elf_howto_table[R_386_GOTOFF];
245 case BFD_RELOC_386_GOTPC:
246 TRACE ("BFD_RELOC_386_GOTPC");
247 return &elf_howto_table[R_386_GOTPC];
249 /* These relocs are a GNU extension. */
250 case BFD_RELOC_386_TLS_TPOFF:
251 TRACE ("BFD_RELOC_386_TLS_TPOFF");
252 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
254 case BFD_RELOC_386_TLS_IE:
255 TRACE ("BFD_RELOC_386_TLS_IE");
256 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
258 case BFD_RELOC_386_TLS_GOTIE:
259 TRACE ("BFD_RELOC_386_TLS_GOTIE");
260 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
262 case BFD_RELOC_386_TLS_LE:
263 TRACE ("BFD_RELOC_386_TLS_LE");
264 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
266 case BFD_RELOC_386_TLS_GD:
267 TRACE ("BFD_RELOC_386_TLS_GD");
268 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
270 case BFD_RELOC_386_TLS_LDM:
271 TRACE ("BFD_RELOC_386_TLS_LDM");
272 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
275 TRACE ("BFD_RELOC_16");
276 return &elf_howto_table[R_386_16 - R_386_ext_offset];
278 case BFD_RELOC_16_PCREL:
279 TRACE ("BFD_RELOC_16_PCREL");
280 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
283 TRACE ("BFD_RELOC_8");
284 return &elf_howto_table[R_386_8 - R_386_ext_offset];
286 case BFD_RELOC_8_PCREL:
287 TRACE ("BFD_RELOC_8_PCREL");
288 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
290 /* Common with Sun TLS implementation. */
291 case BFD_RELOC_386_TLS_LDO_32:
292 TRACE ("BFD_RELOC_386_TLS_LDO_32");
293 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
295 case BFD_RELOC_386_TLS_IE_32:
296 TRACE ("BFD_RELOC_386_TLS_IE_32");
297 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
299 case BFD_RELOC_386_TLS_LE_32:
300 TRACE ("BFD_RELOC_386_TLS_LE_32");
301 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
303 case BFD_RELOC_386_TLS_DTPMOD32:
304 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
305 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
307 case BFD_RELOC_386_TLS_DTPOFF32:
308 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
309 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
311 case BFD_RELOC_386_TLS_TPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
313 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
315 case BFD_RELOC_SIZE32:
316 TRACE ("BFD_RELOC_SIZE32");
317 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
319 case BFD_RELOC_386_TLS_GOTDESC:
320 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
321 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
323 case BFD_RELOC_386_TLS_DESC_CALL:
324 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
325 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
327 case BFD_RELOC_386_TLS_DESC:
328 TRACE ("BFD_RELOC_386_TLS_DESC");
329 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
331 case BFD_RELOC_386_IRELATIVE:
332 TRACE ("BFD_RELOC_386_IRELATIVE");
333 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
335 case BFD_RELOC_VTABLE_INHERIT:
336 TRACE ("BFD_RELOC_VTABLE_INHERIT");
337 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
339 case BFD_RELOC_VTABLE_ENTRY:
340 TRACE ("BFD_RELOC_VTABLE_ENTRY");
341 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
351 static reloc_howto_type *
352 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
357 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
358 if (elf_howto_table[i].name != NULL
359 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
360 return &elf_howto_table[i];
365 static reloc_howto_type *
366 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
370 if ((indx = r_type) >= R_386_standard
371 && ((indx = r_type - R_386_ext_offset) - R_386_standard
372 >= R_386_ext - R_386_standard)
373 && ((indx = r_type - R_386_tls_offset) - R_386_ext
374 >= R_386_irelative - R_386_ext)
375 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
376 >= R_386_vt - R_386_irelative))
378 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
382 /* PR 17512: file: 0f67f69d. */
383 if (elf_howto_table [indx].type != r_type)
385 return &elf_howto_table[indx];
389 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
391 Elf_Internal_Rela *dst)
393 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
394 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
397 /* Return whether a symbol name implies a local label. The UnixWare
398 2.1 cc generates temporary symbols that start with .X, so we
399 recognize them here. FIXME: do other SVR4 compilers also use .X?.
400 If so, we should move the .X recognition into
401 _bfd_elf_is_local_label_name. */
404 elf_i386_is_local_label_name (bfd *abfd, const char *name)
406 if (name[0] == '.' && name[1] == 'X')
409 return _bfd_elf_is_local_label_name (abfd, name);
412 /* Support for core dump NOTE sections. */
415 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
420 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
422 int pr_version = bfd_get_32 (abfd, note->descdata);
428 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
431 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
435 size = bfd_get_32 (abfd, note->descdata + 8);
439 switch (note->descsz)
444 case 144: /* Linux/i386 */
446 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
449 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
459 /* Make a ".reg/999" section. */
460 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
461 size, note->descpos + offset);
465 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
467 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
469 int pr_version = bfd_get_32 (abfd, note->descdata);
474 elf_tdata (abfd)->core->program
475 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
476 elf_tdata (abfd)->core->command
477 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
481 switch (note->descsz)
486 case 124: /* Linux/i386 elf_prpsinfo. */
487 elf_tdata (abfd)->core->pid
488 = bfd_get_32 (abfd, note->descdata + 12);
489 elf_tdata (abfd)->core->program
490 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
491 elf_tdata (abfd)->core->command
492 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
496 /* Note that for some reason, a spurious space is tacked
497 onto the end of the args in some (at least one anyway)
498 implementations, so strip it off if it exists. */
500 char *command = elf_tdata (abfd)->core->command;
501 int n = strlen (command);
503 if (0 < n && command[n - 1] == ' ')
504 command[n - 1] = '\0';
510 /* Functions for the i386 ELF linker.
512 In order to gain some understanding of code in this file without
513 knowing all the intricate details of the linker, note the
516 Functions named elf_i386_* are called by external routines, other
517 functions are only called locally. elf_i386_* functions appear
518 in this file more or less in the order in which they are called
519 from external routines. eg. elf_i386_check_relocs is called
520 early in the link process, elf_i386_finish_dynamic_sections is
521 one of the last functions. */
524 /* The name of the dynamic interpreter. This is put in the .interp
527 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
529 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
533 #define ELIMINATE_COPY_RELOCS 1
535 /* The size in bytes of an entry in the procedure linkage table. */
537 #define PLT_ENTRY_SIZE 16
539 /* The first entry in an absolute procedure linkage table looks like
540 this. See the SVR4 ABI i386 supplement to see how this works.
541 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
543 static const bfd_byte elf_i386_plt0_entry[12] =
545 0xff, 0x35, /* pushl contents of address */
546 0, 0, 0, 0, /* replaced with address of .got + 4. */
547 0xff, 0x25, /* jmp indirect */
548 0, 0, 0, 0 /* replaced with address of .got + 8. */
551 /* Subsequent entries in an absolute procedure linkage table look like
554 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
558 0x68, /* pushl immediate */
559 0, 0, 0, 0, /* replaced with offset into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt. */
564 /* The first entry in a PIC procedure linkage table look like this.
565 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
567 static const bfd_byte elf_i386_pic_plt0_entry[12] =
569 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
570 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
573 /* Subsequent entries in a PIC procedure linkage table look like this. */
575 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
577 0xff, 0xa3, /* jmp *offset(%ebx) */
578 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
579 0x68, /* pushl immediate */
580 0, 0, 0, 0, /* replaced with offset into relocation table. */
581 0xe9, /* jmp relative */
582 0, 0, 0, 0 /* replaced with offset to start of .plt. */
585 /* Entries in the GOT procedure linkage table look like this. */
587 static const bfd_byte elf_i386_got_plt_entry[8] =
589 0xff, 0x25, /* jmp indirect */
590 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
591 0x66, 0x90 /* xchg %ax,%ax */
594 /* Entries in the PIC GOT procedure linkage table look like this. */
596 static const bfd_byte elf_i386_pic_got_plt_entry[8] =
598 0xff, 0xa3, /* jmp *offset(%ebx) */
599 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* .eh_frame covering the .plt section. */
605 static const bfd_byte elf_i386_eh_frame_plt[] =
607 #define PLT_CIE_LENGTH 20
608 #define PLT_FDE_LENGTH 36
609 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
610 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
611 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
612 0, 0, 0, 0, /* CIE ID */
614 'z', 'R', 0, /* Augmentation string */
615 1, /* Code alignment factor */
616 0x7c, /* Data alignment factor */
617 8, /* Return address column */
618 1, /* Augmentation size */
619 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
620 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
621 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
622 DW_CFA_nop, DW_CFA_nop,
624 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
625 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
626 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
627 0, 0, 0, 0, /* .plt size goes here */
628 0, /* Augmentation size */
629 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
630 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
631 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
632 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
633 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
634 11, /* Block length */
635 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
636 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
637 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
638 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
639 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
642 struct elf_i386_plt_layout
644 /* The first entry in an absolute procedure linkage table looks like this. */
645 const bfd_byte *plt0_entry;
646 unsigned int plt0_entry_size;
648 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
649 unsigned int plt0_got1_offset;
650 unsigned int plt0_got2_offset;
652 /* Later entries in an absolute procedure linkage table look like this. */
653 const bfd_byte *plt_entry;
654 unsigned int plt_entry_size;
656 /* Offsets into plt_entry that are to be replaced with... */
657 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
658 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
659 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
661 /* Offset into plt_entry where the initial value of the GOT entry points. */
662 unsigned int plt_lazy_offset;
664 /* The first entry in a PIC procedure linkage table looks like this. */
665 const bfd_byte *pic_plt0_entry;
667 /* Subsequent entries in a PIC procedure linkage table look like this. */
668 const bfd_byte *pic_plt_entry;
670 /* .eh_frame covering the .plt section. */
671 const bfd_byte *eh_frame_plt;
672 unsigned int eh_frame_plt_size;
675 #define GET_PLT_ENTRY_SIZE(abfd) \
676 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
678 /* These are the standard parameters. */
679 static const struct elf_i386_plt_layout elf_i386_plt =
681 elf_i386_plt0_entry, /* plt0_entry */
682 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
683 2, /* plt0_got1_offset */
684 8, /* plt0_got2_offset */
685 elf_i386_plt_entry, /* plt_entry */
686 PLT_ENTRY_SIZE, /* plt_entry_size */
687 2, /* plt_got_offset */
688 7, /* plt_reloc_offset */
689 12, /* plt_plt_offset */
690 6, /* plt_lazy_offset */
691 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
692 elf_i386_pic_plt_entry, /* pic_plt_entry */
693 elf_i386_eh_frame_plt, /* eh_frame_plt */
694 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
698 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
699 for the PLTResolve stub and then for each PLT entry. */
700 #define PLTRESOLVE_RELOCS_SHLIB 0
701 #define PLTRESOLVE_RELOCS 2
702 #define PLT_NON_JUMP_SLOT_RELOCS 2
704 /* Architecture-specific backend data for i386. */
706 struct elf_i386_backend_data
708 /* Parameters describing PLT generation. */
709 const struct elf_i386_plt_layout *plt;
711 /* Value used to fill the unused bytes of the first PLT entry. */
712 bfd_byte plt0_pad_byte;
714 /* True if the target system is VxWorks. */
718 #define get_elf_i386_backend_data(abfd) \
719 ((const struct elf_i386_backend_data *) \
720 get_elf_backend_data (abfd)->arch_data)
722 /* These are the standard parameters. */
723 static const struct elf_i386_backend_data elf_i386_arch_bed =
725 &elf_i386_plt, /* plt */
726 0, /* plt0_pad_byte */
730 #define elf_backend_arch_data &elf_i386_arch_bed
732 /* i386 ELF linker hash entry. */
734 struct elf_i386_link_hash_entry
736 struct elf_link_hash_entry elf;
738 /* Track dynamic relocs copied for this symbol. */
739 struct elf_dyn_relocs *dyn_relocs;
741 #define GOT_UNKNOWN 0
745 #define GOT_TLS_IE_POS 5
746 #define GOT_TLS_IE_NEG 6
747 #define GOT_TLS_IE_BOTH 7
748 #define GOT_TLS_GDESC 8
749 #define GOT_TLS_GD_BOTH_P(type) \
750 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
751 #define GOT_TLS_GD_P(type) \
752 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
753 #define GOT_TLS_GDESC_P(type) \
754 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
755 #define GOT_TLS_GD_ANY_P(type) \
756 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
757 unsigned char tls_type;
759 /* Symbol is referenced by R_386_GOTOFF relocation. */
760 unsigned int gotoff_ref : 1;
762 /* Information about the GOT PLT entry. Filled when there are both
763 GOT and PLT relocations against the same function. */
764 union gotplt_union plt_got;
766 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
767 starting at the end of the jump table. */
771 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
773 struct elf_i386_obj_tdata
775 struct elf_obj_tdata root;
777 /* tls_type for each local got entry. */
778 char *local_got_tls_type;
780 /* GOTPLT entries for TLS descriptors. */
781 bfd_vma *local_tlsdesc_gotent;
784 #define elf_i386_tdata(abfd) \
785 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
787 #define elf_i386_local_got_tls_type(abfd) \
788 (elf_i386_tdata (abfd)->local_got_tls_type)
790 #define elf_i386_local_tlsdesc_gotent(abfd) \
791 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
793 #define is_i386_elf(bfd) \
794 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
795 && elf_tdata (bfd) != NULL \
796 && elf_object_id (bfd) == I386_ELF_DATA)
799 elf_i386_mkobject (bfd *abfd)
801 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
805 /* i386 ELF linker hash table. */
807 struct elf_i386_link_hash_table
809 struct elf_link_hash_table elf;
811 /* Short-cuts to get to dynamic linker sections. */
814 asection *plt_eh_frame;
819 bfd_signed_vma refcount;
823 /* The amount of space used by the reserved portion of the sgotplt
824 section, plus whatever space is used by the jump slots. */
825 bfd_vma sgotplt_jump_table_size;
827 /* Small local sym cache. */
828 struct sym_cache sym_cache;
830 /* _TLS_MODULE_BASE_ symbol. */
831 struct bfd_link_hash_entry *tls_module_base;
833 /* Used by local STT_GNU_IFUNC symbols. */
834 htab_t loc_hash_table;
835 void * loc_hash_memory;
837 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
840 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
841 bfd_vma next_tls_desc_index;
843 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
844 bfd_vma next_jump_slot_index;
846 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
847 bfd_vma next_irelative_index;
850 /* Get the i386 ELF linker hash table from a link_info structure. */
852 #define elf_i386_hash_table(p) \
853 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
854 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
856 #define elf_i386_compute_jump_table_size(htab) \
857 ((htab)->elf.srelplt->reloc_count * 4)
859 /* Create an entry in an i386 ELF linker hash table. */
861 static struct bfd_hash_entry *
862 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
863 struct bfd_hash_table *table,
866 /* Allocate the structure if it has not already been allocated by a
870 entry = (struct bfd_hash_entry *)
871 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
876 /* Call the allocation method of the superclass. */
877 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
880 struct elf_i386_link_hash_entry *eh;
882 eh = (struct elf_i386_link_hash_entry *) entry;
883 eh->dyn_relocs = NULL;
884 eh->tls_type = GOT_UNKNOWN;
886 eh->plt_got.offset = (bfd_vma) -1;
887 eh->tlsdesc_got = (bfd_vma) -1;
893 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
894 for local symbol so that we can handle local STT_GNU_IFUNC symbols
895 as global symbol. We reuse indx and dynstr_index for local symbol
896 hash since they aren't used by global symbols in this backend. */
899 elf_i386_local_htab_hash (const void *ptr)
901 struct elf_link_hash_entry *h
902 = (struct elf_link_hash_entry *) ptr;
903 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
906 /* Compare local hash entries. */
909 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
911 struct elf_link_hash_entry *h1
912 = (struct elf_link_hash_entry *) ptr1;
913 struct elf_link_hash_entry *h2
914 = (struct elf_link_hash_entry *) ptr2;
916 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
919 /* Find and/or create a hash entry for local symbol. */
921 static struct elf_link_hash_entry *
922 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
923 bfd *abfd, const Elf_Internal_Rela *rel,
926 struct elf_i386_link_hash_entry e, *ret;
927 asection *sec = abfd->sections;
928 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
929 ELF32_R_SYM (rel->r_info));
932 e.elf.indx = sec->id;
933 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
934 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
935 create ? INSERT : NO_INSERT);
942 ret = (struct elf_i386_link_hash_entry *) *slot;
946 ret = (struct elf_i386_link_hash_entry *)
947 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
948 sizeof (struct elf_i386_link_hash_entry));
951 memset (ret, 0, sizeof (*ret));
952 ret->elf.indx = sec->id;
953 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
954 ret->elf.dynindx = -1;
955 ret->plt_got.offset = (bfd_vma) -1;
961 /* Destroy an i386 ELF linker hash table. */
964 elf_i386_link_hash_table_free (bfd *obfd)
966 struct elf_i386_link_hash_table *htab
967 = (struct elf_i386_link_hash_table *) obfd->link.hash;
969 if (htab->loc_hash_table)
970 htab_delete (htab->loc_hash_table);
971 if (htab->loc_hash_memory)
972 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
973 _bfd_elf_link_hash_table_free (obfd);
976 /* Create an i386 ELF linker hash table. */
978 static struct bfd_link_hash_table *
979 elf_i386_link_hash_table_create (bfd *abfd)
981 struct elf_i386_link_hash_table *ret;
982 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
984 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
988 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
989 elf_i386_link_hash_newfunc,
990 sizeof (struct elf_i386_link_hash_entry),
997 ret->loc_hash_table = htab_try_create (1024,
998 elf_i386_local_htab_hash,
999 elf_i386_local_htab_eq,
1001 ret->loc_hash_memory = objalloc_create ();
1002 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1004 elf_i386_link_hash_table_free (abfd);
1007 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1009 return &ret->elf.root;
1012 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1013 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1017 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1019 struct elf_i386_link_hash_table *htab;
1021 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1024 htab = elf_i386_hash_table (info);
1028 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1032 if (info->executable)
1034 /* Always allow copy relocs for building executables. */
1035 asection *s = bfd_get_linker_section (dynobj, ".rel.bss");
1038 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1039 s = bfd_make_section_anyway_with_flags (dynobj,
1041 (bed->dynamic_sec_flags
1044 || ! bfd_set_section_alignment (dynobj, s,
1045 bed->s->log_file_align))
1051 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1052 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1056 if (!info->no_ld_generated_unwind_info
1057 && htab->plt_eh_frame == NULL
1058 && htab->elf.splt != NULL)
1060 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1061 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1062 | SEC_LINKER_CREATED);
1064 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1065 if (htab->plt_eh_frame == NULL
1066 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1073 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1076 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1077 struct elf_link_hash_entry *dir,
1078 struct elf_link_hash_entry *ind)
1080 struct elf_i386_link_hash_entry *edir, *eind;
1082 edir = (struct elf_i386_link_hash_entry *) dir;
1083 eind = (struct elf_i386_link_hash_entry *) ind;
1085 if (eind->dyn_relocs != NULL)
1087 if (edir->dyn_relocs != NULL)
1089 struct elf_dyn_relocs **pp;
1090 struct elf_dyn_relocs *p;
1092 /* Add reloc counts against the indirect sym to the direct sym
1093 list. Merge any entries against the same section. */
1094 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1096 struct elf_dyn_relocs *q;
1098 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1099 if (q->sec == p->sec)
1101 q->pc_count += p->pc_count;
1102 q->count += p->count;
1109 *pp = edir->dyn_relocs;
1112 edir->dyn_relocs = eind->dyn_relocs;
1113 eind->dyn_relocs = NULL;
1116 if (ind->root.type == bfd_link_hash_indirect
1117 && dir->got.refcount <= 0)
1119 edir->tls_type = eind->tls_type;
1120 eind->tls_type = GOT_UNKNOWN;
1123 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1124 generate a R_386_COPY reloc. */
1125 edir->gotoff_ref |= eind->gotoff_ref;
1127 if (ELIMINATE_COPY_RELOCS
1128 && ind->root.type != bfd_link_hash_indirect
1129 && dir->dynamic_adjusted)
1131 /* If called to transfer flags for a weakdef during processing
1132 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1133 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1134 dir->ref_dynamic |= ind->ref_dynamic;
1135 dir->ref_regular |= ind->ref_regular;
1136 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1137 dir->needs_plt |= ind->needs_plt;
1138 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1141 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1144 /* Return TRUE if the TLS access code sequence support transition
1148 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1150 Elf_Internal_Shdr *symtab_hdr,
1151 struct elf_link_hash_entry **sym_hashes,
1152 unsigned int r_type,
1153 const Elf_Internal_Rela *rel,
1154 const Elf_Internal_Rela *relend)
1156 unsigned int val, type;
1157 unsigned long r_symndx;
1158 struct elf_link_hash_entry *h;
1161 /* Get the section contents. */
1162 if (contents == NULL)
1164 if (elf_section_data (sec)->this_hdr.contents != NULL)
1165 contents = elf_section_data (sec)->this_hdr.contents;
1168 /* FIXME: How to better handle error condition? */
1169 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1172 /* Cache the section contents for elf_link_input_bfd. */
1173 elf_section_data (sec)->this_hdr.contents = contents;
1177 offset = rel->r_offset;
1182 if (offset < 2 || (rel + 1) >= relend)
1185 type = bfd_get_8 (abfd, contents + offset - 2);
1186 if (r_type == R_386_TLS_GD)
1188 /* Check transition from GD access model. Only
1189 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1190 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1191 can transit to different access model. */
1192 if ((offset + 10) > sec->size ||
1193 (type != 0x8d && type != 0x04))
1196 val = bfd_get_8 (abfd, contents + offset - 1);
1199 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1203 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1206 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1211 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1212 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1215 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1221 /* Check transition from LD access model. Only
1222 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1223 can transit to different access model. */
1224 if (type != 0x8d || (offset + 9) > sec->size)
1227 val = bfd_get_8 (abfd, contents + offset - 1);
1228 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1232 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1235 r_symndx = ELF32_R_SYM (rel[1].r_info);
1236 if (r_symndx < symtab_hdr->sh_info)
1239 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1240 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1241 may be versioned. */
1243 && h->root.root.string != NULL
1244 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1245 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1246 && (strncmp (h->root.root.string, "___tls_get_addr",
1250 /* Check transition from IE access model:
1251 movl foo@indntpoff(%rip), %eax
1252 movl foo@indntpoff(%rip), %reg
1253 addl foo@indntpoff(%rip), %reg
1256 if (offset < 1 || (offset + 4) > sec->size)
1259 /* Check "movl foo@tpoff(%rip), %eax" first. */
1260 val = bfd_get_8 (abfd, contents + offset - 1);
1267 /* Check movl|addl foo@tpoff(%rip), %reg. */
1268 type = bfd_get_8 (abfd, contents + offset - 2);
1269 return ((type == 0x8b || type == 0x03)
1270 && (val & 0xc7) == 0x05);
1272 case R_386_TLS_GOTIE:
1273 case R_386_TLS_IE_32:
1274 /* Check transition from {IE_32,GOTIE} access model:
1275 subl foo@{tpoff,gontoff}(%reg1), %reg2
1276 movl foo@{tpoff,gontoff}(%reg1), %reg2
1277 addl foo@{tpoff,gontoff}(%reg1), %reg2
1280 if (offset < 2 || (offset + 4) > sec->size)
1283 val = bfd_get_8 (abfd, contents + offset - 1);
1284 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1287 type = bfd_get_8 (abfd, contents + offset - 2);
1288 return type == 0x8b || type == 0x2b || type == 0x03;
1290 case R_386_TLS_GOTDESC:
1291 /* Check transition from GDesc access model:
1292 leal x@tlsdesc(%ebx), %eax
1294 Make sure it's a leal adding ebx to a 32-bit offset
1295 into any register, although it's probably almost always
1298 if (offset < 2 || (offset + 4) > sec->size)
1301 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1304 val = bfd_get_8 (abfd, contents + offset - 1);
1305 return (val & 0xc7) == 0x83;
1307 case R_386_TLS_DESC_CALL:
1308 /* Check transition from GDesc access model:
1309 call *x@tlsdesc(%rax)
1311 if (offset + 2 <= sec->size)
1313 /* Make sure that it's a call *x@tlsdesc(%rax). */
1314 static const unsigned char call[] = { 0xff, 0x10 };
1315 return memcmp (contents + offset, call, 2) == 0;
1325 /* Return TRUE if the TLS access transition is OK or no transition
1326 will be performed. Update R_TYPE if there is a transition. */
1329 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1330 asection *sec, bfd_byte *contents,
1331 Elf_Internal_Shdr *symtab_hdr,
1332 struct elf_link_hash_entry **sym_hashes,
1333 unsigned int *r_type, int tls_type,
1334 const Elf_Internal_Rela *rel,
1335 const Elf_Internal_Rela *relend,
1336 struct elf_link_hash_entry *h,
1337 unsigned long r_symndx)
1339 unsigned int from_type = *r_type;
1340 unsigned int to_type = from_type;
1341 bfd_boolean check = TRUE;
1343 /* Skip TLS transition for functions. */
1345 && (h->type == STT_FUNC
1346 || h->type == STT_GNU_IFUNC))
1352 case R_386_TLS_GOTDESC:
1353 case R_386_TLS_DESC_CALL:
1354 case R_386_TLS_IE_32:
1356 case R_386_TLS_GOTIE:
1357 if (info->executable)
1360 to_type = R_386_TLS_LE_32;
1361 else if (from_type != R_386_TLS_IE
1362 && from_type != R_386_TLS_GOTIE)
1363 to_type = R_386_TLS_IE_32;
1366 /* When we are called from elf_i386_relocate_section, CONTENTS
1367 isn't NULL and there may be additional transitions based on
1369 if (contents != NULL)
1371 unsigned int new_to_type = to_type;
1373 if (info->executable
1376 && (tls_type & GOT_TLS_IE))
1377 new_to_type = R_386_TLS_LE_32;
1379 if (to_type == R_386_TLS_GD
1380 || to_type == R_386_TLS_GOTDESC
1381 || to_type == R_386_TLS_DESC_CALL)
1383 if (tls_type == GOT_TLS_IE_POS)
1384 new_to_type = R_386_TLS_GOTIE;
1385 else if (tls_type & GOT_TLS_IE)
1386 new_to_type = R_386_TLS_IE_32;
1389 /* We checked the transition before when we were called from
1390 elf_i386_check_relocs. We only want to check the new
1391 transition which hasn't been checked before. */
1392 check = new_to_type != to_type && from_type == to_type;
1393 to_type = new_to_type;
1399 if (info->executable)
1400 to_type = R_386_TLS_LE_32;
1407 /* Return TRUE if there is no transition. */
1408 if (from_type == to_type)
1411 /* Check if the transition can be performed. */
1413 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1414 symtab_hdr, sym_hashes,
1415 from_type, rel, relend))
1417 reloc_howto_type *from, *to;
1420 from = elf_i386_rtype_to_howto (abfd, from_type);
1421 to = elf_i386_rtype_to_howto (abfd, to_type);
1424 name = h->root.root.string;
1427 struct elf_i386_link_hash_table *htab;
1429 htab = elf_i386_hash_table (info);
1434 Elf_Internal_Sym *isym;
1436 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1438 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1442 (*_bfd_error_handler)
1443 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1444 "in section `%A' failed"),
1445 abfd, sec, from->name, to->name, name,
1446 (unsigned long) rel->r_offset);
1447 bfd_set_error (bfd_error_bad_value);
1455 /* Rename some of the generic section flags to better document how they
1457 #define need_convert_mov_to_lea sec_flg0
1459 /* Look through the relocs for a section during the first phase, and
1460 calculate needed space in the global offset table, procedure linkage
1461 table, and dynamic reloc sections. */
1464 elf_i386_check_relocs (bfd *abfd,
1465 struct bfd_link_info *info,
1467 const Elf_Internal_Rela *relocs)
1469 struct elf_i386_link_hash_table *htab;
1470 Elf_Internal_Shdr *symtab_hdr;
1471 struct elf_link_hash_entry **sym_hashes;
1472 const Elf_Internal_Rela *rel;
1473 const Elf_Internal_Rela *rel_end;
1475 bfd_boolean use_plt_got;
1477 if (info->relocatable)
1480 BFD_ASSERT (is_i386_elf (abfd));
1482 htab = elf_i386_hash_table (info);
1486 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1487 && (get_elf_i386_backend_data (abfd)
1488 == &elf_i386_arch_bed));
1490 symtab_hdr = &elf_symtab_hdr (abfd);
1491 sym_hashes = elf_sym_hashes (abfd);
1495 rel_end = relocs + sec->reloc_count;
1496 for (rel = relocs; rel < rel_end; rel++)
1498 unsigned int r_type;
1499 unsigned long r_symndx;
1500 struct elf_link_hash_entry *h;
1501 struct elf_i386_link_hash_entry *eh;
1502 Elf_Internal_Sym *isym;
1504 bfd_boolean size_reloc;
1506 r_symndx = ELF32_R_SYM (rel->r_info);
1507 r_type = ELF32_R_TYPE (rel->r_info);
1509 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1511 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1517 if (r_symndx < symtab_hdr->sh_info)
1519 /* A local symbol. */
1520 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1525 /* Check relocation against local STT_GNU_IFUNC symbol. */
1526 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1528 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1532 /* Fake a STT_GNU_IFUNC symbol. */
1533 h->type = STT_GNU_IFUNC;
1536 h->forced_local = 1;
1537 h->root.type = bfd_link_hash_defined;
1545 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1546 while (h->root.type == bfd_link_hash_indirect
1547 || h->root.type == bfd_link_hash_warning)
1548 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1551 eh = (struct elf_i386_link_hash_entry *) h;
1554 /* Create the ifunc sections for static executables. If we
1555 never see an indirect function symbol nor we are building
1556 a static executable, those sections will be empty and
1557 won't appear in output. */
1569 if (htab->elf.dynobj == NULL)
1570 htab->elf.dynobj = abfd;
1571 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1576 /* It is referenced by a non-shared object. */
1578 h->root.non_ir_ref = 1;
1580 if (h->type == STT_GNU_IFUNC)
1581 elf_tdata (info->output_bfd)->has_gnu_symbols
1582 |= elf_gnu_symbol_ifunc;
1585 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1586 symtab_hdr, sym_hashes,
1587 &r_type, GOT_UNKNOWN,
1588 rel, rel_end, h, r_symndx))
1594 htab->tls_ldm_got.refcount += 1;
1598 /* This symbol requires a procedure linkage table entry. We
1599 actually build the entry in adjust_dynamic_symbol,
1600 because this might be a case of linking PIC code which is
1601 never referenced by a dynamic object, in which case we
1602 don't need to generate a procedure linkage table entry
1605 /* If this is a local symbol, we resolve it directly without
1606 creating a procedure linkage table entry. */
1611 h->plt.refcount += 1;
1618 case R_386_TLS_IE_32:
1620 case R_386_TLS_GOTIE:
1621 if (!info->executable)
1622 info->flags |= DF_STATIC_TLS;
1627 case R_386_TLS_GOTDESC:
1628 case R_386_TLS_DESC_CALL:
1629 /* This symbol requires a global offset table entry. */
1631 int tls_type, old_tls_type;
1636 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1637 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1638 case R_386_TLS_GOTDESC:
1639 case R_386_TLS_DESC_CALL:
1640 tls_type = GOT_TLS_GDESC; break;
1641 case R_386_TLS_IE_32:
1642 if (ELF32_R_TYPE (rel->r_info) == r_type)
1643 tls_type = GOT_TLS_IE_NEG;
1645 /* If this is a GD->IE transition, we may use either of
1646 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1647 tls_type = GOT_TLS_IE;
1650 case R_386_TLS_GOTIE:
1651 tls_type = GOT_TLS_IE_POS; break;
1656 h->got.refcount += 1;
1657 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1661 bfd_signed_vma *local_got_refcounts;
1663 /* This is a global offset table entry for a local symbol. */
1664 local_got_refcounts = elf_local_got_refcounts (abfd);
1665 if (local_got_refcounts == NULL)
1669 size = symtab_hdr->sh_info;
1670 size *= (sizeof (bfd_signed_vma)
1671 + sizeof (bfd_vma) + sizeof(char));
1672 local_got_refcounts = (bfd_signed_vma *)
1673 bfd_zalloc (abfd, size);
1674 if (local_got_refcounts == NULL)
1676 elf_local_got_refcounts (abfd) = local_got_refcounts;
1677 elf_i386_local_tlsdesc_gotent (abfd)
1678 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1679 elf_i386_local_got_tls_type (abfd)
1680 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1682 local_got_refcounts[r_symndx] += 1;
1683 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1686 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1687 tls_type |= old_tls_type;
1688 /* If a TLS symbol is accessed using IE at least once,
1689 there is no point to use dynamic model for it. */
1690 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1691 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1692 || (tls_type & GOT_TLS_IE) == 0))
1694 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1695 tls_type = old_tls_type;
1696 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1697 && GOT_TLS_GD_ANY_P (tls_type))
1698 tls_type |= old_tls_type;
1702 name = h->root.root.string;
1704 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1706 (*_bfd_error_handler)
1707 (_("%B: `%s' accessed both as normal and "
1708 "thread local symbol"),
1710 bfd_set_error (bfd_error_bad_value);
1715 if (old_tls_type != tls_type)
1718 elf_i386_hash_entry (h)->tls_type = tls_type;
1720 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1728 if (htab->elf.sgot == NULL)
1730 if (htab->elf.dynobj == NULL)
1731 htab->elf.dynobj = abfd;
1732 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1735 if (r_type != R_386_TLS_IE)
1739 case R_386_TLS_LE_32:
1741 if (info->executable)
1743 info->flags |= DF_STATIC_TLS;
1748 if (h != NULL && info->executable)
1750 /* If this reloc is in a read-only section, we might
1751 need a copy reloc. We can't check reliably at this
1752 stage whether the section is read-only, as input
1753 sections have not yet been mapped to output sections.
1754 Tentatively set the flag for now, and correct in
1755 adjust_dynamic_symbol. */
1758 /* We may need a .plt entry if the function this reloc
1759 refers to is in a shared lib. */
1760 h->plt.refcount += 1;
1761 if (r_type != R_386_PC32)
1762 h->pointer_equality_needed = 1;
1767 /* If we are creating a shared library, and this is a reloc
1768 against a global symbol, or a non PC relative reloc
1769 against a local symbol, then we need to copy the reloc
1770 into the shared library. However, if we are linking with
1771 -Bsymbolic, we do not need to copy a reloc against a
1772 global symbol which is defined in an object we are
1773 including in the link (i.e., DEF_REGULAR is set). At
1774 this point we have not seen all the input files, so it is
1775 possible that DEF_REGULAR is not set now but will be set
1776 later (it is never cleared). In case of a weak definition,
1777 DEF_REGULAR may be cleared later by a strong definition in
1778 a shared library. We account for that possibility below by
1779 storing information in the relocs_copied field of the hash
1780 table entry. A similar situation occurs when creating
1781 shared libraries and symbol visibility changes render the
1784 If on the other hand, we are creating an executable, we
1785 may need to keep relocations for symbols satisfied by a
1786 dynamic library if we manage to avoid copy relocs for the
1789 && (sec->flags & SEC_ALLOC) != 0
1790 && (r_type != R_386_PC32
1792 && (! SYMBOLIC_BIND (info, h)
1793 || h->root.type == bfd_link_hash_defweak
1794 || !h->def_regular))))
1795 || (ELIMINATE_COPY_RELOCS
1797 && (sec->flags & SEC_ALLOC) != 0
1799 && (h->root.type == bfd_link_hash_defweak
1800 || !h->def_regular)))
1802 struct elf_dyn_relocs *p;
1803 struct elf_dyn_relocs **head;
1805 /* We must copy these reloc types into the output file.
1806 Create a reloc section in dynobj and make room for
1810 if (htab->elf.dynobj == NULL)
1811 htab->elf.dynobj = abfd;
1813 sreloc = _bfd_elf_make_dynamic_reloc_section
1814 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1820 /* If this is a global symbol, we count the number of
1821 relocations we need for this symbol. */
1824 head = &eh->dyn_relocs;
1828 /* Track dynamic relocs needed for local syms too.
1829 We really need local syms available to do this
1834 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1839 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1843 vpp = &elf_section_data (s)->local_dynrel;
1844 head = (struct elf_dyn_relocs **)vpp;
1848 if (p == NULL || p->sec != sec)
1850 bfd_size_type amt = sizeof *p;
1851 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1863 /* Count size relocation as PC-relative relocation. */
1864 if (r_type == R_386_PC32 || size_reloc)
1869 /* This relocation describes the C++ object vtable hierarchy.
1870 Reconstruct it for later use during GC. */
1871 case R_386_GNU_VTINHERIT:
1872 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1876 /* This relocation describes which C++ vtable entries are actually
1877 used. Record for later use during GC. */
1878 case R_386_GNU_VTENTRY:
1879 BFD_ASSERT (h != NULL);
1881 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1891 && h->plt.refcount > 0
1892 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
1893 || h->got.refcount > 0)
1894 && htab->plt_got == NULL)
1896 /* Create the GOT procedure linkage table. */
1897 unsigned int plt_got_align;
1898 const struct elf_backend_data *bed;
1900 bed = get_elf_backend_data (info->output_bfd);
1901 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
1902 && (sizeof (elf_i386_got_plt_entry)
1903 == sizeof (elf_i386_pic_got_plt_entry)));
1906 if (htab->elf.dynobj == NULL)
1907 htab->elf.dynobj = abfd;
1909 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1911 (bed->dynamic_sec_flags
1916 if (htab->plt_got == NULL
1917 || !bfd_set_section_alignment (htab->elf.dynobj,
1923 if (r_type == R_386_GOT32
1924 && (h == NULL || h->type != STT_GNU_IFUNC))
1925 sec->need_convert_mov_to_lea = 1;
1931 /* Return the section that should be marked against GC for a given
1935 elf_i386_gc_mark_hook (asection *sec,
1936 struct bfd_link_info *info,
1937 Elf_Internal_Rela *rel,
1938 struct elf_link_hash_entry *h,
1939 Elf_Internal_Sym *sym)
1942 switch (ELF32_R_TYPE (rel->r_info))
1944 case R_386_GNU_VTINHERIT:
1945 case R_386_GNU_VTENTRY:
1949 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1952 /* Update the got entry reference counts for the section being removed. */
1955 elf_i386_gc_sweep_hook (bfd *abfd,
1956 struct bfd_link_info *info,
1958 const Elf_Internal_Rela *relocs)
1960 struct elf_i386_link_hash_table *htab;
1961 Elf_Internal_Shdr *symtab_hdr;
1962 struct elf_link_hash_entry **sym_hashes;
1963 bfd_signed_vma *local_got_refcounts;
1964 const Elf_Internal_Rela *rel, *relend;
1966 if (info->relocatable)
1969 htab = elf_i386_hash_table (info);
1973 elf_section_data (sec)->local_dynrel = NULL;
1975 symtab_hdr = &elf_symtab_hdr (abfd);
1976 sym_hashes = elf_sym_hashes (abfd);
1977 local_got_refcounts = elf_local_got_refcounts (abfd);
1979 relend = relocs + sec->reloc_count;
1980 for (rel = relocs; rel < relend; rel++)
1982 unsigned long r_symndx;
1983 unsigned int r_type;
1984 struct elf_link_hash_entry *h = NULL;
1986 r_symndx = ELF32_R_SYM (rel->r_info);
1987 if (r_symndx >= symtab_hdr->sh_info)
1989 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1990 while (h->root.type == bfd_link_hash_indirect
1991 || h->root.type == bfd_link_hash_warning)
1992 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1996 /* A local symbol. */
1997 Elf_Internal_Sym *isym;
1999 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2002 /* Check relocation against local STT_GNU_IFUNC symbol. */
2004 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2006 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
2014 struct elf_i386_link_hash_entry *eh;
2015 struct elf_dyn_relocs **pp;
2016 struct elf_dyn_relocs *p;
2018 eh = (struct elf_i386_link_hash_entry *) h;
2019 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2022 /* Everything must go for SEC. */
2028 r_type = ELF32_R_TYPE (rel->r_info);
2029 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
2030 symtab_hdr, sym_hashes,
2031 &r_type, GOT_UNKNOWN,
2032 rel, relend, h, r_symndx))
2038 if (htab->tls_ldm_got.refcount > 0)
2039 htab->tls_ldm_got.refcount -= 1;
2043 case R_386_TLS_GOTDESC:
2044 case R_386_TLS_DESC_CALL:
2045 case R_386_TLS_IE_32:
2047 case R_386_TLS_GOTIE:
2051 if (h->got.refcount > 0)
2052 h->got.refcount -= 1;
2053 if (h->type == STT_GNU_IFUNC)
2055 if (h->plt.refcount > 0)
2056 h->plt.refcount -= 1;
2059 else if (local_got_refcounts != NULL)
2061 if (local_got_refcounts[r_symndx] > 0)
2062 local_got_refcounts[r_symndx] -= 1;
2070 && (h == NULL || h->type != STT_GNU_IFUNC))
2077 if (h->plt.refcount > 0)
2078 h->plt.refcount -= 1;
2083 if (h != NULL && h->type == STT_GNU_IFUNC)
2085 if (h->got.refcount > 0)
2086 h->got.refcount -= 1;
2087 if (h->plt.refcount > 0)
2088 h->plt.refcount -= 1;
2100 /* Adjust a symbol defined by a dynamic object and referenced by a
2101 regular object. The current definition is in some section of the
2102 dynamic object, but we're not including those sections. We have to
2103 change the definition to something the rest of the link can
2107 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2108 struct elf_link_hash_entry *h)
2110 struct elf_i386_link_hash_table *htab;
2112 struct elf_i386_link_hash_entry *eh;
2113 struct elf_dyn_relocs *p;
2115 /* STT_GNU_IFUNC symbol must go through PLT. */
2116 if (h->type == STT_GNU_IFUNC)
2118 /* All local STT_GNU_IFUNC references must be treate as local
2119 calls via local PLT. */
2121 && SYMBOL_CALLS_LOCAL (info, h))
2123 bfd_size_type pc_count = 0, count = 0;
2124 struct elf_dyn_relocs **pp;
2126 eh = (struct elf_i386_link_hash_entry *) h;
2127 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2129 pc_count += p->pc_count;
2130 p->count -= p->pc_count;
2139 if (pc_count || count)
2143 if (h->plt.refcount <= 0)
2144 h->plt.refcount = 1;
2146 h->plt.refcount += 1;
2150 if (h->plt.refcount <= 0)
2152 h->plt.offset = (bfd_vma) -1;
2158 /* If this is a function, put it in the procedure linkage table. We
2159 will fill in the contents of the procedure linkage table later,
2160 when we know the address of the .got section. */
2161 if (h->type == STT_FUNC
2164 if (h->plt.refcount <= 0
2165 || SYMBOL_CALLS_LOCAL (info, h)
2166 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2167 && h->root.type == bfd_link_hash_undefweak))
2169 /* This case can occur if we saw a PLT32 reloc in an input
2170 file, but the symbol was never referred to by a dynamic
2171 object, or if all references were garbage collected. In
2172 such a case, we don't actually need to build a procedure
2173 linkage table, and we can just do a PC32 reloc instead. */
2174 h->plt.offset = (bfd_vma) -1;
2181 /* It's possible that we incorrectly decided a .plt reloc was
2182 needed for an R_386_PC32 reloc to a non-function sym in
2183 check_relocs. We can't decide accurately between function and
2184 non-function syms in check-relocs; Objects loaded later in
2185 the link may change h->type. So fix it now. */
2186 h->plt.offset = (bfd_vma) -1;
2188 /* If this is a weak symbol, and there is a real definition, the
2189 processor independent code will have arranged for us to see the
2190 real definition first, and we can just use the same value. */
2191 if (h->u.weakdef != NULL)
2193 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2194 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2195 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2196 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2197 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2198 h->non_got_ref = h->u.weakdef->non_got_ref;
2202 /* This is a reference to a symbol defined by a dynamic object which
2203 is not a function. */
2205 /* If we are creating a shared library, we must presume that the
2206 only references to the symbol are via the global offset table.
2207 For such cases we need not do anything here; the relocations will
2208 be handled correctly by relocate_section. */
2209 if (!info->executable)
2212 /* If there are no references to this symbol that do not use the
2213 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2215 eh = (struct elf_i386_link_hash_entry *) h;
2216 if (!h->non_got_ref && !eh->gotoff_ref)
2219 /* If -z nocopyreloc was given, we won't generate them either. */
2220 if (info->nocopyreloc)
2226 htab = elf_i386_hash_table (info);
2230 /* If there aren't any dynamic relocs in read-only sections nor
2231 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2232 avoid the copy reloc. This doesn't work on VxWorks, where we can
2233 not have dynamic relocations (other than copy and jump slot
2234 relocations) in an executable. */
2235 if (ELIMINATE_COPY_RELOCS
2237 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2239 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2241 s = p->sec->output_section;
2242 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2253 /* We must allocate the symbol in our .dynbss section, which will
2254 become part of the .bss section of the executable. There will be
2255 an entry for this symbol in the .dynsym section. The dynamic
2256 object will contain position independent code, so all references
2257 from the dynamic object to this symbol will go through the global
2258 offset table. The dynamic linker will use the .dynsym entry to
2259 determine the address it must put in the global offset table, so
2260 both the dynamic object and the regular object will refer to the
2261 same memory location for the variable. */
2263 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2264 copy the initial value out of the dynamic object and into the
2265 runtime process image. */
2266 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2268 htab->srelbss->size += sizeof (Elf32_External_Rel);
2274 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2277 /* Allocate space in .plt, .got and associated reloc sections for
2281 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2283 struct bfd_link_info *info;
2284 struct elf_i386_link_hash_table *htab;
2285 struct elf_i386_link_hash_entry *eh;
2286 struct elf_dyn_relocs *p;
2287 unsigned plt_entry_size;
2289 if (h->root.type == bfd_link_hash_indirect)
2292 eh = (struct elf_i386_link_hash_entry *) h;
2294 info = (struct bfd_link_info *) inf;
2295 htab = elf_i386_hash_table (info);
2299 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2301 /* We can't use the GOT PLT if pointer equality is needed since
2302 finish_dynamic_symbol won't clear symbol value and the dynamic
2303 linker won't update the GOT slot. We will get into an infinite
2304 loop at run-time. */
2305 if (htab->plt_got != NULL
2306 && h->type != STT_GNU_IFUNC
2307 && !h->pointer_equality_needed
2308 && h->plt.refcount > 0
2309 && h->got.refcount > 0)
2311 /* Don't use the regular PLT if there are both GOT and GOTPLT
2313 h->plt.offset = (bfd_vma) -1;
2315 /* Use the GOT PLT. */
2316 eh->plt_got.refcount = 1;
2319 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2320 here if it is defined and referenced in a non-shared object. */
2321 if (h->type == STT_GNU_IFUNC
2323 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2326 else if (htab->elf.dynamic_sections_created
2327 && (h->plt.refcount > 0 || eh->plt_got.refcount > 0))
2329 bfd_boolean use_plt_got;
2331 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2333 /* Don't use the regular PLT for DF_BIND_NOW. */
2334 h->plt.offset = (bfd_vma) -1;
2336 /* Use the GOT PLT. */
2337 h->got.refcount = 1;
2338 eh->plt_got.refcount = 1;
2341 use_plt_got = eh->plt_got.refcount > 0;
2343 /* Make sure this symbol is output as a dynamic symbol.
2344 Undefined weak syms won't yet be marked as dynamic. */
2345 if (h->dynindx == -1
2346 && !h->forced_local)
2348 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2353 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2355 asection *s = htab->elf.splt;
2356 asection *got_s = htab->plt_got;
2358 /* If this is the first .plt entry, make room for the special
2359 first entry. The .plt section is used by prelink to undo
2360 prelinking for dynamic relocations. */
2362 s->size = plt_entry_size;
2365 eh->plt_got.offset = got_s->size;
2367 h->plt.offset = s->size;
2369 /* If this symbol is not defined in a regular file, and we are
2370 not generating a shared library, then set the symbol to this
2371 location in the .plt. This is required to make function
2372 pointers compare as equal between the normal executable and
2373 the shared library. */
2379 /* We need to make a call to the entry of the GOT PLT
2380 instead of regular PLT entry. */
2381 h->root.u.def.section = got_s;
2382 h->root.u.def.value = eh->plt_got.offset;
2386 h->root.u.def.section = s;
2387 h->root.u.def.value = h->plt.offset;
2391 /* Make room for this entry. */
2393 got_s->size += sizeof (elf_i386_got_plt_entry);
2396 s->size += plt_entry_size;
2398 /* We also need to make an entry in the .got.plt section,
2399 which will be placed in the .got section by the linker
2401 htab->elf.sgotplt->size += 4;
2403 /* We also need to make an entry in the .rel.plt section. */
2404 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2405 htab->elf.srelplt->reloc_count++;
2408 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2411 /* VxWorks has a second set of relocations for each PLT entry
2412 in executables. They go in a separate relocation section,
2413 which is processed by the kernel loader. */
2415 /* There are two relocations for the initial PLT entry: an
2416 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2417 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2419 if (h->plt.offset == plt_entry_size)
2420 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2422 /* There are two extra relocations for each subsequent PLT entry:
2423 an R_386_32 relocation for the GOT entry, and an R_386_32
2424 relocation for the PLT entry. */
2426 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2431 h->plt.offset = (bfd_vma) -1;
2437 h->plt.offset = (bfd_vma) -1;
2441 eh->tlsdesc_got = (bfd_vma) -1;
2443 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2444 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2445 if (h->got.refcount > 0
2448 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2449 h->got.offset = (bfd_vma) -1;
2450 else if (h->got.refcount > 0)
2454 int tls_type = elf_i386_hash_entry(h)->tls_type;
2456 /* Make sure this symbol is output as a dynamic symbol.
2457 Undefined weak syms won't yet be marked as dynamic. */
2458 if (h->dynindx == -1
2459 && !h->forced_local)
2461 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2466 if (GOT_TLS_GDESC_P (tls_type))
2468 eh->tlsdesc_got = htab->elf.sgotplt->size
2469 - elf_i386_compute_jump_table_size (htab);
2470 htab->elf.sgotplt->size += 8;
2471 h->got.offset = (bfd_vma) -2;
2473 if (! GOT_TLS_GDESC_P (tls_type)
2474 || GOT_TLS_GD_P (tls_type))
2476 h->got.offset = s->size;
2478 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2479 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2482 dyn = htab->elf.dynamic_sections_created;
2483 /* R_386_TLS_IE_32 needs one dynamic relocation,
2484 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2485 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2486 need two), R_386_TLS_GD needs one if local symbol and two if
2488 if (tls_type == GOT_TLS_IE_BOTH)
2489 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2490 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2491 || (tls_type & GOT_TLS_IE))
2492 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2493 else if (GOT_TLS_GD_P (tls_type))
2494 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2495 else if (! GOT_TLS_GDESC_P (tls_type)
2496 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2497 || h->root.type != bfd_link_hash_undefweak)
2499 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2500 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2501 if (GOT_TLS_GDESC_P (tls_type))
2502 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2505 h->got.offset = (bfd_vma) -1;
2507 if (eh->dyn_relocs == NULL)
2510 /* In the shared -Bsymbolic case, discard space allocated for
2511 dynamic pc-relative relocs against symbols which turn out to be
2512 defined in regular objects. For the normal shared case, discard
2513 space for pc-relative relocs that have become local due to symbol
2514 visibility changes. */
2518 /* The only reloc that uses pc_count is R_386_PC32, which will
2519 appear on a call or on something like ".long foo - .". We
2520 want calls to protected symbols to resolve directly to the
2521 function rather than going via the plt. If people want
2522 function pointer comparisons to work as expected then they
2523 should avoid writing assembly like ".long foo - .". */
2524 if (SYMBOL_CALLS_LOCAL (info, h))
2526 struct elf_dyn_relocs **pp;
2528 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2530 p->count -= p->pc_count;
2539 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2541 struct elf_dyn_relocs **pp;
2542 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2544 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2551 /* Also discard relocs on undefined weak syms with non-default
2553 if (eh->dyn_relocs != NULL
2554 && h->root.type == bfd_link_hash_undefweak)
2556 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2557 eh->dyn_relocs = NULL;
2559 /* Make sure undefined weak symbols are output as a dynamic
2561 else if (h->dynindx == -1
2562 && !h->forced_local)
2564 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2569 else if (ELIMINATE_COPY_RELOCS)
2571 /* For the non-shared case, discard space for relocs against
2572 symbols which turn out to need copy relocs or are not
2578 || (htab->elf.dynamic_sections_created
2579 && (h->root.type == bfd_link_hash_undefweak
2580 || h->root.type == bfd_link_hash_undefined))))
2582 /* Make sure this symbol is output as a dynamic symbol.
2583 Undefined weak syms won't yet be marked as dynamic. */
2584 if (h->dynindx == -1
2585 && !h->forced_local)
2587 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2591 /* If that succeeded, we know we'll be keeping all the
2593 if (h->dynindx != -1)
2597 eh->dyn_relocs = NULL;
2602 /* Finally, allocate space. */
2603 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2607 sreloc = elf_section_data (p->sec)->sreloc;
2609 BFD_ASSERT (sreloc != NULL);
2610 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2616 /* Allocate space in .plt, .got and associated reloc sections for
2617 local dynamic relocs. */
2620 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2622 struct elf_link_hash_entry *h
2623 = (struct elf_link_hash_entry *) *slot;
2625 if (h->type != STT_GNU_IFUNC
2629 || h->root.type != bfd_link_hash_defined)
2632 return elf_i386_allocate_dynrelocs (h, inf);
2635 /* Find any dynamic relocs that apply to read-only sections. */
2638 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2640 struct elf_i386_link_hash_entry *eh;
2641 struct elf_dyn_relocs *p;
2643 /* Skip local IFUNC symbols. */
2644 if (h->forced_local && h->type == STT_GNU_IFUNC)
2647 eh = (struct elf_i386_link_hash_entry *) h;
2648 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2650 asection *s = p->sec->output_section;
2652 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2654 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2656 info->flags |= DF_TEXTREL;
2658 if ((info->warn_shared_textrel && info->shared)
2659 || info->error_textrel)
2660 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2661 p->sec->owner, h->root.root.string,
2664 /* Not an error, just cut short the traversal. */
2672 mov foo@GOT(%reg), %reg
2674 lea foo@GOTOFF(%reg), %reg
2675 with the local symbol, foo. */
2678 elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2679 struct bfd_link_info *link_info)
2681 Elf_Internal_Shdr *symtab_hdr;
2682 Elf_Internal_Rela *internal_relocs;
2683 Elf_Internal_Rela *irel, *irelend;
2685 struct elf_i386_link_hash_table *htab;
2686 bfd_boolean changed_contents;
2687 bfd_boolean changed_relocs;
2688 bfd_signed_vma *local_got_refcounts;
2690 /* Don't even try to convert non-ELF outputs. */
2691 if (!is_elf_hash_table (link_info->hash))
2694 /* Nothing to do if there is no need or no output. */
2695 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2696 || sec->need_convert_mov_to_lea == 0
2697 || bfd_is_abs_section (sec->output_section))
2700 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2702 /* Load the relocations for this section. */
2703 internal_relocs = (_bfd_elf_link_read_relocs
2704 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2705 link_info->keep_memory));
2706 if (internal_relocs == NULL)
2709 htab = elf_i386_hash_table (link_info);
2710 changed_contents = FALSE;
2711 changed_relocs = FALSE;
2712 local_got_refcounts = elf_local_got_refcounts (abfd);
2714 /* Get the section contents. */
2715 if (elf_section_data (sec)->this_hdr.contents != NULL)
2716 contents = elf_section_data (sec)->this_hdr.contents;
2719 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2723 irelend = internal_relocs + sec->reloc_count;
2724 for (irel = internal_relocs; irel < irelend; irel++)
2726 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2727 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2729 struct elf_link_hash_entry *h;
2731 if (r_type != R_386_GOT32)
2734 /* Get the symbol referred to by the reloc. */
2735 if (r_symndx < symtab_hdr->sh_info)
2737 Elf_Internal_Sym *isym;
2739 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2742 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2743 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2744 && irel->r_offset >= 2
2745 && bfd_get_8 (abfd, contents + irel->r_offset - 2) == 0x8b)
2747 bfd_put_8 (abfd, 0x8d, contents + irel->r_offset - 2);
2748 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2749 if (local_got_refcounts != NULL
2750 && local_got_refcounts[r_symndx] > 0)
2751 local_got_refcounts[r_symndx] -= 1;
2752 changed_contents = TRUE;
2753 changed_relocs = TRUE;
2758 indx = r_symndx - symtab_hdr->sh_info;
2759 h = elf_sym_hashes (abfd)[indx];
2760 BFD_ASSERT (h != NULL);
2762 while (h->root.type == bfd_link_hash_indirect
2763 || h->root.type == bfd_link_hash_warning)
2764 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2766 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2767 optimizing _DYNAMIC since ld.so may use its link-time address. */
2769 && h->type != STT_GNU_IFUNC
2770 && h != htab->elf.hdynamic
2771 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2772 && irel->r_offset >= 2
2773 && bfd_get_8 (abfd, contents + irel->r_offset - 2) == 0x8b)
2775 bfd_put_8 (abfd, 0x8d, contents + irel->r_offset - 2);
2776 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2777 if (h->got.refcount > 0)
2778 h->got.refcount -= 1;
2779 changed_contents = TRUE;
2780 changed_relocs = TRUE;
2784 if (contents != NULL
2785 && elf_section_data (sec)->this_hdr.contents != contents)
2787 if (!changed_contents && !link_info->keep_memory)
2791 /* Cache the section contents for elf_link_input_bfd. */
2792 elf_section_data (sec)->this_hdr.contents = contents;
2796 if (elf_section_data (sec)->relocs != internal_relocs)
2798 if (!changed_relocs)
2799 free (internal_relocs);
2801 elf_section_data (sec)->relocs = internal_relocs;
2807 if (contents != NULL
2808 && elf_section_data (sec)->this_hdr.contents != contents)
2810 if (internal_relocs != NULL
2811 && elf_section_data (sec)->relocs != internal_relocs)
2812 free (internal_relocs);
2816 /* Set the sizes of the dynamic sections. */
2819 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2821 struct elf_i386_link_hash_table *htab;
2827 htab = elf_i386_hash_table (info);
2830 dynobj = htab->elf.dynobj;
2834 if (htab->elf.dynamic_sections_created)
2836 /* Set the contents of the .interp section to the interpreter. */
2837 if (info->executable)
2839 s = bfd_get_linker_section (dynobj, ".interp");
2842 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2843 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2847 /* Set up .got offsets for local syms, and space for local dynamic
2849 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2851 bfd_signed_vma *local_got;
2852 bfd_signed_vma *end_local_got;
2853 char *local_tls_type;
2854 bfd_vma *local_tlsdesc_gotent;
2855 bfd_size_type locsymcount;
2856 Elf_Internal_Shdr *symtab_hdr;
2859 if (! is_i386_elf (ibfd))
2862 for (s = ibfd->sections; s != NULL; s = s->next)
2864 struct elf_dyn_relocs *p;
2866 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2869 for (p = ((struct elf_dyn_relocs *)
2870 elf_section_data (s)->local_dynrel);
2874 if (!bfd_is_abs_section (p->sec)
2875 && bfd_is_abs_section (p->sec->output_section))
2877 /* Input section has been discarded, either because
2878 it is a copy of a linkonce section or due to
2879 linker script /DISCARD/, so we'll be discarding
2882 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
2883 && strcmp (p->sec->output_section->name,
2886 /* Relocations in vxworks .tls_vars sections are
2887 handled specially by the loader. */
2889 else if (p->count != 0)
2891 srel = elf_section_data (p->sec)->sreloc;
2892 srel->size += p->count * sizeof (Elf32_External_Rel);
2893 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2894 && (info->flags & DF_TEXTREL) == 0)
2896 info->flags |= DF_TEXTREL;
2897 if ((info->warn_shared_textrel && info->shared)
2898 || info->error_textrel)
2899 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2900 p->sec->owner, p->sec);
2906 local_got = elf_local_got_refcounts (ibfd);
2910 symtab_hdr = &elf_symtab_hdr (ibfd);
2911 locsymcount = symtab_hdr->sh_info;
2912 end_local_got = local_got + locsymcount;
2913 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2914 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2916 srel = htab->elf.srelgot;
2917 for (; local_got < end_local_got;
2918 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2920 *local_tlsdesc_gotent = (bfd_vma) -1;
2923 if (GOT_TLS_GDESC_P (*local_tls_type))
2925 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2926 - elf_i386_compute_jump_table_size (htab);
2927 htab->elf.sgotplt->size += 8;
2928 *local_got = (bfd_vma) -2;
2930 if (! GOT_TLS_GDESC_P (*local_tls_type)
2931 || GOT_TLS_GD_P (*local_tls_type))
2933 *local_got = s->size;
2935 if (GOT_TLS_GD_P (*local_tls_type)
2936 || *local_tls_type == GOT_TLS_IE_BOTH)
2940 || GOT_TLS_GD_ANY_P (*local_tls_type)
2941 || (*local_tls_type & GOT_TLS_IE))
2943 if (*local_tls_type == GOT_TLS_IE_BOTH)
2944 srel->size += 2 * sizeof (Elf32_External_Rel);
2945 else if (GOT_TLS_GD_P (*local_tls_type)
2946 || ! GOT_TLS_GDESC_P (*local_tls_type))
2947 srel->size += sizeof (Elf32_External_Rel);
2948 if (GOT_TLS_GDESC_P (*local_tls_type))
2949 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2953 *local_got = (bfd_vma) -1;
2957 if (htab->tls_ldm_got.refcount > 0)
2959 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2961 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2962 htab->elf.sgot->size += 8;
2963 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2966 htab->tls_ldm_got.offset = -1;
2968 /* Allocate global sym .plt and .got entries, and space for global
2969 sym dynamic relocs. */
2970 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2972 /* Allocate .plt and .got entries, and space for local symbols. */
2973 htab_traverse (htab->loc_hash_table,
2974 elf_i386_allocate_local_dynrelocs,
2977 /* For every jump slot reserved in the sgotplt, reloc_count is
2978 incremented. However, when we reserve space for TLS descriptors,
2979 it's not incremented, so in order to compute the space reserved
2980 for them, it suffices to multiply the reloc count by the jump
2983 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2984 so that R_386_IRELATIVE entries come last. */
2985 if (htab->elf.srelplt)
2987 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2988 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2989 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2991 else if (htab->elf.irelplt)
2992 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2995 if (htab->elf.sgotplt)
2997 /* Don't allocate .got.plt section if there are no GOT nor PLT
2998 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2999 if ((htab->elf.hgot == NULL
3000 || !htab->elf.hgot->ref_regular_nonweak)
3001 && (htab->elf.sgotplt->size
3002 == get_elf_backend_data (output_bfd)->got_header_size)
3003 && (htab->elf.splt == NULL
3004 || htab->elf.splt->size == 0)
3005 && (htab->elf.sgot == NULL
3006 || htab->elf.sgot->size == 0)
3007 && (htab->elf.iplt == NULL
3008 || htab->elf.iplt->size == 0)
3009 && (htab->elf.igotplt == NULL
3010 || htab->elf.igotplt->size == 0))
3011 htab->elf.sgotplt->size = 0;
3015 if (htab->plt_eh_frame != NULL
3016 && htab->elf.splt != NULL
3017 && htab->elf.splt->size != 0
3018 && !bfd_is_abs_section (htab->elf.splt->output_section)
3019 && _bfd_elf_eh_frame_present (info))
3020 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
3022 /* We now have determined the sizes of the various dynamic sections.
3023 Allocate memory for them. */
3025 for (s = dynobj->sections; s != NULL; s = s->next)
3027 bfd_boolean strip_section = TRUE;
3029 if ((s->flags & SEC_LINKER_CREATED) == 0)
3032 if (s == htab->elf.splt
3033 || s == htab->elf.sgot)
3035 /* Strip this section if we don't need it; see the
3037 /* We'd like to strip these sections if they aren't needed, but if
3038 we've exported dynamic symbols from them we must leave them.
3039 It's too late to tell BFD to get rid of the symbols. */
3041 if (htab->elf.hplt != NULL)
3042 strip_section = FALSE;
3044 else if (s == htab->elf.sgotplt
3045 || s == htab->elf.iplt
3046 || s == htab->elf.igotplt
3047 || s == htab->plt_got
3048 || s == htab->plt_eh_frame
3049 || s == htab->sdynbss)
3051 /* Strip these too. */
3053 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
3056 && s != htab->elf.srelplt
3057 && s != htab->srelplt2)
3060 /* We use the reloc_count field as a counter if we need
3061 to copy relocs into the output file. */
3066 /* It's not one of our sections, so don't allocate space. */
3072 /* If we don't need this section, strip it from the
3073 output file. This is mostly to handle .rel.bss and
3074 .rel.plt. We must create both sections in
3075 create_dynamic_sections, because they must be created
3076 before the linker maps input sections to output
3077 sections. The linker does that before
3078 adjust_dynamic_symbol is called, and it is that
3079 function which decides whether anything needs to go
3080 into these sections. */
3082 s->flags |= SEC_EXCLUDE;
3086 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3089 /* Allocate memory for the section contents. We use bfd_zalloc
3090 here in case unused entries are not reclaimed before the
3091 section's contents are written out. This should not happen,
3092 but this way if it does, we get a R_386_NONE reloc instead
3094 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3095 if (s->contents == NULL)
3099 if (htab->plt_eh_frame != NULL
3100 && htab->plt_eh_frame->contents != NULL)
3102 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3103 sizeof (elf_i386_eh_frame_plt));
3104 bfd_put_32 (dynobj, htab->elf.splt->size,
3105 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3108 if (htab->elf.dynamic_sections_created)
3110 /* Add some entries to the .dynamic section. We fill in the
3111 values later, in elf_i386_finish_dynamic_sections, but we
3112 must add the entries now so that we get the correct size for
3113 the .dynamic section. The DT_DEBUG entry is filled in by the
3114 dynamic linker and used by the debugger. */
3115 #define add_dynamic_entry(TAG, VAL) \
3116 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3118 if (info->executable)
3120 if (!add_dynamic_entry (DT_DEBUG, 0))
3124 if (htab->elf.splt->size != 0)
3126 /* DT_PLTGOT is used by prelink even if there is no PLT
3128 if (!add_dynamic_entry (DT_PLTGOT, 0))
3131 if (htab->elf.srelplt->size != 0)
3133 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3134 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3135 || !add_dynamic_entry (DT_JMPREL, 0))
3142 if (!add_dynamic_entry (DT_REL, 0)
3143 || !add_dynamic_entry (DT_RELSZ, 0)
3144 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3147 /* If any dynamic relocs apply to a read-only section,
3148 then we need a DT_TEXTREL entry. */
3149 if ((info->flags & DF_TEXTREL) == 0)
3150 elf_link_hash_traverse (&htab->elf,
3151 elf_i386_readonly_dynrelocs, info);
3153 if ((info->flags & DF_TEXTREL) != 0)
3155 if ((elf_tdata (output_bfd)->has_gnu_symbols
3156 & elf_gnu_symbol_ifunc) == elf_gnu_symbol_ifunc)
3158 info->callbacks->einfo
3159 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3160 bfd_set_error (bfd_error_bad_value);
3164 if (!add_dynamic_entry (DT_TEXTREL, 0))
3168 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3169 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3172 #undef add_dynamic_entry
3178 elf_i386_always_size_sections (bfd *output_bfd,
3179 struct bfd_link_info *info)
3181 asection *tls_sec = elf_hash_table (info)->tls_sec;
3185 struct elf_link_hash_entry *tlsbase;
3187 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3188 "_TLS_MODULE_BASE_",
3189 FALSE, FALSE, FALSE);
3191 if (tlsbase && tlsbase->type == STT_TLS)
3193 struct elf_i386_link_hash_table *htab;
3194 struct bfd_link_hash_entry *bh = NULL;
3195 const struct elf_backend_data *bed
3196 = get_elf_backend_data (output_bfd);
3198 htab = elf_i386_hash_table (info);
3202 if (!(_bfd_generic_link_add_one_symbol
3203 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3204 tls_sec, 0, NULL, FALSE,
3205 bed->collect, &bh)))
3208 htab->tls_module_base = bh;
3210 tlsbase = (struct elf_link_hash_entry *)bh;
3211 tlsbase->def_regular = 1;
3212 tlsbase->other = STV_HIDDEN;
3213 tlsbase->root.linker_def = 1;
3214 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3221 /* Set the correct type for an x86 ELF section. We do this by the
3222 section name, which is a hack, but ought to work. */
3225 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3226 Elf_Internal_Shdr *hdr,
3231 name = bfd_get_section_name (abfd, sec);
3233 /* This is an ugly, but unfortunately necessary hack that is
3234 needed when producing EFI binaries on x86. It tells
3235 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3236 containing ELF relocation info. We need this hack in order to
3237 be able to generate ELF binaries that can be translated into
3238 EFI applications (which are essentially COFF objects). Those
3239 files contain a COFF ".reloc" section inside an ELFNN object,
3240 which would normally cause BFD to segfault because it would
3241 attempt to interpret this section as containing relocation
3242 entries for section "oc". With this hack enabled, ".reloc"
3243 will be treated as a normal data section, which will avoid the
3244 segfault. However, you won't be able to create an ELFNN binary
3245 with a section named "oc" that needs relocations, but that's
3246 the kind of ugly side-effects you get when detecting section
3247 types based on their names... In practice, this limitation is
3248 unlikely to bite. */
3249 if (strcmp (name, ".reloc") == 0)
3250 hdr->sh_type = SHT_PROGBITS;
3255 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3256 executables. Rather than setting it to the beginning of the TLS
3257 section, we have to set it to the end. This function may be called
3258 multiple times, it is idempotent. */
3261 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3263 struct elf_i386_link_hash_table *htab;
3264 struct bfd_link_hash_entry *base;
3266 if (!info->executable)
3269 htab = elf_i386_hash_table (info);
3273 base = htab->tls_module_base;
3277 base->u.def.value = htab->elf.tls_size;
3280 /* Return the base VMA address which should be subtracted from real addresses
3281 when resolving @dtpoff relocation.
3282 This is PT_TLS segment p_vaddr. */
3285 elf_i386_dtpoff_base (struct bfd_link_info *info)
3287 /* If tls_sec is NULL, we should have signalled an error already. */
3288 if (elf_hash_table (info)->tls_sec == NULL)
3290 return elf_hash_table (info)->tls_sec->vma;
3293 /* Return the relocation value for @tpoff relocation
3294 if STT_TLS virtual address is ADDRESS. */
3297 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3299 struct elf_link_hash_table *htab = elf_hash_table (info);
3300 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3301 bfd_vma static_tls_size;
3303 /* If tls_sec is NULL, we should have signalled an error already. */
3304 if (htab->tls_sec == NULL)
3307 /* Consider special static TLS alignment requirements. */
3308 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3309 return static_tls_size + htab->tls_sec->vma - address;
3312 /* Relocate an i386 ELF section. */
3315 elf_i386_relocate_section (bfd *output_bfd,
3316 struct bfd_link_info *info,
3318 asection *input_section,
3320 Elf_Internal_Rela *relocs,
3321 Elf_Internal_Sym *local_syms,
3322 asection **local_sections)
3324 struct elf_i386_link_hash_table *htab;
3325 Elf_Internal_Shdr *symtab_hdr;
3326 struct elf_link_hash_entry **sym_hashes;
3327 bfd_vma *local_got_offsets;
3328 bfd_vma *local_tlsdesc_gotents;
3329 Elf_Internal_Rela *rel;
3330 Elf_Internal_Rela *relend;
3331 bfd_boolean is_vxworks_tls;
3332 unsigned plt_entry_size;
3334 BFD_ASSERT (is_i386_elf (input_bfd));
3336 htab = elf_i386_hash_table (info);
3339 symtab_hdr = &elf_symtab_hdr (input_bfd);
3340 sym_hashes = elf_sym_hashes (input_bfd);
3341 local_got_offsets = elf_local_got_offsets (input_bfd);
3342 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3343 /* We have to handle relocations in vxworks .tls_vars sections
3344 specially, because the dynamic loader is 'weird'. */
3345 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3347 && !strcmp (input_section->output_section->name,
3350 elf_i386_set_tls_module_base (info);
3352 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3355 relend = relocs + input_section->reloc_count;
3356 for (; rel < relend; rel++)
3358 unsigned int r_type;
3359 reloc_howto_type *howto;
3360 unsigned long r_symndx;
3361 struct elf_link_hash_entry *h;
3362 struct elf_i386_link_hash_entry *eh;
3363 Elf_Internal_Sym *sym;
3365 bfd_vma off, offplt, plt_offset;
3367 bfd_boolean unresolved_reloc;
3368 bfd_reloc_status_type r;
3372 asection *resolved_plt;
3374 r_type = ELF32_R_TYPE (rel->r_info);
3375 if (r_type == R_386_GNU_VTINHERIT
3376 || r_type == R_386_GNU_VTENTRY)
3379 if ((indx = r_type) >= R_386_standard
3380 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3381 >= R_386_ext - R_386_standard)
3382 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3383 >= R_386_irelative - R_386_ext))
3385 (*_bfd_error_handler)
3386 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3387 input_bfd, input_section, r_type);
3388 bfd_set_error (bfd_error_bad_value);
3391 howto = elf_howto_table + indx;
3393 r_symndx = ELF32_R_SYM (rel->r_info);
3397 unresolved_reloc = FALSE;
3398 if (r_symndx < symtab_hdr->sh_info)
3400 sym = local_syms + r_symndx;
3401 sec = local_sections[r_symndx];
3402 relocation = (sec->output_section->vma
3403 + sec->output_offset
3405 st_size = sym->st_size;
3407 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3408 && ((sec->flags & SEC_MERGE) != 0
3409 || (info->relocatable
3410 && sec->output_offset != 0)))
3413 bfd_byte *where = contents + rel->r_offset;
3415 switch (howto->size)
3418 addend = bfd_get_8 (input_bfd, where);
3419 if (howto->pc_relative)
3421 addend = (addend ^ 0x80) - 0x80;
3426 addend = bfd_get_16 (input_bfd, where);
3427 if (howto->pc_relative)
3429 addend = (addend ^ 0x8000) - 0x8000;
3434 addend = bfd_get_32 (input_bfd, where);
3435 if (howto->pc_relative)
3437 addend = (addend ^ 0x80000000) - 0x80000000;
3445 if (info->relocatable)
3446 addend += sec->output_offset;
3449 asection *msec = sec;
3450 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3452 addend -= relocation;
3453 addend += msec->output_section->vma + msec->output_offset;
3456 switch (howto->size)
3459 /* FIXME: overflow checks. */
3460 if (howto->pc_relative)
3462 bfd_put_8 (input_bfd, addend, where);
3465 if (howto->pc_relative)
3467 bfd_put_16 (input_bfd, addend, where);
3470 if (howto->pc_relative)
3472 bfd_put_32 (input_bfd, addend, where);
3476 else if (!info->relocatable
3477 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3479 /* Relocate against local STT_GNU_IFUNC symbol. */
3480 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3485 /* Set STT_GNU_IFUNC symbol value. */
3486 h->root.u.def.value = sym->st_value;
3487 h->root.u.def.section = sec;
3492 bfd_boolean warned ATTRIBUTE_UNUSED;
3493 bfd_boolean ignored ATTRIBUTE_UNUSED;
3495 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3496 r_symndx, symtab_hdr, sym_hashes,
3498 unresolved_reloc, warned, ignored);
3502 if (sec != NULL && discarded_section (sec))
3503 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3504 rel, 1, relend, howto, 0, contents);
3506 if (info->relocatable)
3509 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3510 it here if it is defined in a non-shared object. */
3512 && h->type == STT_GNU_IFUNC
3515 asection *plt, *gotplt, *base_got;
3519 if ((input_section->flags & SEC_ALLOC) == 0)
3521 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3522 sections because such sections are not SEC_ALLOC and
3523 thus ld.so will not process them. */
3524 if ((input_section->flags & SEC_DEBUGGING) != 0)
3528 else if (h->plt.offset == (bfd_vma) -1)
3531 /* STT_GNU_IFUNC symbol must go through PLT. */
3532 if (htab->elf.splt != NULL)
3534 plt = htab->elf.splt;
3535 gotplt = htab->elf.sgotplt;
3539 plt = htab->elf.iplt;
3540 gotplt = htab->elf.igotplt;
3543 relocation = (plt->output_section->vma
3544 + plt->output_offset + h->plt.offset);
3549 if (h->root.root.string)
3550 name = h->root.root.string;
3552 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3554 (*_bfd_error_handler)
3555 (_("%B: relocation %s against STT_GNU_IFUNC "
3556 "symbol `%s' isn't handled by %s"), input_bfd,
3557 elf_howto_table[r_type].name,
3558 name, __FUNCTION__);
3559 bfd_set_error (bfd_error_bad_value);
3563 /* Generate dynamic relcoation only when there is a
3564 non-GOT reference in a shared object. */
3565 if (info->shared && h->non_got_ref)
3567 Elf_Internal_Rela outrel;
3571 /* Need a dynamic relocation to get the real function
3573 offset = _bfd_elf_section_offset (output_bfd,
3577 if (offset == (bfd_vma) -1
3578 || offset == (bfd_vma) -2)
3581 outrel.r_offset = (input_section->output_section->vma
3582 + input_section->output_offset
3585 if (h->dynindx == -1
3587 || info->executable)
3589 /* This symbol is resolved locally. */
3590 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3591 bfd_put_32 (output_bfd,
3592 (h->root.u.def.value
3593 + h->root.u.def.section->output_section->vma
3594 + h->root.u.def.section->output_offset),
3598 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3600 sreloc = htab->elf.irelifunc;
3601 elf_append_rel (output_bfd, sreloc, &outrel);
3603 /* If this reloc is against an external symbol, we
3604 do not want to fiddle with the addend. Otherwise,
3605 we need to include the symbol value so that it
3606 becomes an addend for the dynamic reloc. For an
3607 internal symbol, we have updated addend. */
3616 base_got = htab->elf.sgot;
3617 off = h->got.offset;
3619 if (base_got == NULL)
3622 if (off == (bfd_vma) -1)
3624 /* We can't use h->got.offset here to save state, or
3625 even just remember the offset, as finish_dynamic_symbol
3626 would use that as offset into .got. */
3628 if (htab->elf.splt != NULL)
3630 plt_index = h->plt.offset / plt_entry_size - 1;
3631 off = (plt_index + 3) * 4;
3632 base_got = htab->elf.sgotplt;
3636 plt_index = h->plt.offset / plt_entry_size;
3637 off = plt_index * 4;
3638 base_got = htab->elf.igotplt;
3641 if (h->dynindx == -1
3645 /* This references the local defitionion. We must
3646 initialize this entry in the global offset table.
3647 Since the offset must always be a multiple of 8,
3648 we use the least significant bit to record
3649 whether we have initialized it already.
3651 When doing a dynamic link, we create a .rela.got
3652 relocation entry to initialize the value. This
3653 is done in the finish_dynamic_symbol routine. */
3658 bfd_put_32 (output_bfd, relocation,
3659 base_got->contents + off);
3666 /* Adjust for static executables. */
3667 if (htab->elf.splt == NULL)
3668 relocation += gotplt->output_offset;
3672 relocation = (base_got->output_section->vma
3673 + base_got->output_offset + off
3674 - gotplt->output_section->vma
3675 - gotplt->output_offset);
3676 /* Adjust for static executables. */
3677 if (htab->elf.splt == NULL)
3678 relocation += gotplt->output_offset;
3684 relocation -= (gotplt->output_section->vma
3685 + gotplt->output_offset);
3693 /* Relocation is to the entry for this symbol in the global
3695 if (htab->elf.sgot == NULL)
3702 off = h->got.offset;
3703 dyn = htab->elf.dynamic_sections_created;
3704 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3706 && SYMBOL_REFERENCES_LOCAL (info, h))
3707 || (ELF_ST_VISIBILITY (h->other)
3708 && h->root.type == bfd_link_hash_undefweak))
3710 /* This is actually a static link, or it is a
3711 -Bsymbolic link and the symbol is defined
3712 locally, or the symbol was forced to be local
3713 because of a version file. We must initialize
3714 this entry in the global offset table. Since the
3715 offset must always be a multiple of 4, we use the
3716 least significant bit to record whether we have
3717 initialized it already.
3719 When doing a dynamic link, we create a .rel.got
3720 relocation entry to initialize the value. This
3721 is done in the finish_dynamic_symbol routine. */
3726 bfd_put_32 (output_bfd, relocation,
3727 htab->elf.sgot->contents + off);
3732 unresolved_reloc = FALSE;
3736 if (local_got_offsets == NULL)
3739 off = local_got_offsets[r_symndx];
3741 /* The offset must always be a multiple of 4. We use
3742 the least significant bit to record whether we have
3743 already generated the necessary reloc. */
3748 bfd_put_32 (output_bfd, relocation,
3749 htab->elf.sgot->contents + off);
3754 Elf_Internal_Rela outrel;
3756 s = htab->elf.srelgot;
3760 outrel.r_offset = (htab->elf.sgot->output_section->vma
3761 + htab->elf.sgot->output_offset
3763 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3764 elf_append_rel (output_bfd, s, &outrel);
3767 local_got_offsets[r_symndx] |= 1;
3771 if (off >= (bfd_vma) -2)
3774 relocation = htab->elf.sgot->output_section->vma
3775 + htab->elf.sgot->output_offset + off
3776 - htab->elf.sgotplt->output_section->vma
3777 - htab->elf.sgotplt->output_offset;
3781 /* Relocation is relative to the start of the global offset
3784 /* Check to make sure it isn't a protected function or data
3785 symbol for shared library since it may not be local when
3786 used as function address or with copy relocation. We also
3787 need to make sure that a symbol is referenced locally. */
3788 if (!info->executable && h)
3790 if (!h->def_regular)
3794 switch (ELF_ST_VISIBILITY (h->other))
3797 v = _("hidden symbol");
3800 v = _("internal symbol");
3803 v = _("protected symbol");
3810 (*_bfd_error_handler)
3811 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3812 input_bfd, v, h->root.root.string);
3813 bfd_set_error (bfd_error_bad_value);
3816 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3817 && (h->type == STT_FUNC
3818 || h->type == STT_OBJECT)
3819 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3821 (*_bfd_error_handler)
3822 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
3824 h->type == STT_FUNC ? "function" : "data",
3825 h->root.root.string);
3826 bfd_set_error (bfd_error_bad_value);
3831 /* Note that sgot is not involved in this
3832 calculation. We always want the start of .got.plt. If we
3833 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3834 permitted by the ABI, we might have to change this
3836 relocation -= htab->elf.sgotplt->output_section->vma
3837 + htab->elf.sgotplt->output_offset;
3841 /* Use global offset table as symbol value. */
3842 relocation = htab->elf.sgotplt->output_section->vma
3843 + htab->elf.sgotplt->output_offset;
3844 unresolved_reloc = FALSE;
3848 /* Relocation is to the entry for this symbol in the
3849 procedure linkage table. */
3851 /* Resolve a PLT32 reloc against a local symbol directly,
3852 without using the procedure linkage table. */
3856 eh = (struct elf_i386_link_hash_entry *) h;
3857 if ((h->plt.offset == (bfd_vma) -1
3858 && eh->plt_got.offset == (bfd_vma) -1)
3859 || htab->elf.splt == NULL)
3861 /* We didn't make a PLT entry for this symbol. This
3862 happens when statically linking PIC code, or when
3863 using -Bsymbolic. */
3867 if (h->plt.offset != (bfd_vma) -1)
3869 resolved_plt = htab->elf.splt;
3870 plt_offset = h->plt.offset;
3874 resolved_plt = htab->plt_got;
3875 plt_offset = eh->plt_got.offset;
3878 relocation = (resolved_plt->output_section->vma
3879 + resolved_plt->output_offset
3881 unresolved_reloc = FALSE;
3885 /* Set to symbol size. */
3886 relocation = st_size;
3891 if ((input_section->flags & SEC_ALLOC) == 0
3897 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3898 || h->root.type != bfd_link_hash_undefweak)
3899 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3900 || !SYMBOL_CALLS_LOCAL (info, h)))
3901 || (ELIMINATE_COPY_RELOCS
3908 || h->root.type == bfd_link_hash_undefweak
3909 || h->root.type == bfd_link_hash_undefined)))
3911 Elf_Internal_Rela outrel;
3912 bfd_boolean skip, relocate;
3915 /* When generating a shared object, these relocations
3916 are copied into the output file to be resolved at run
3923 _bfd_elf_section_offset (output_bfd, info, input_section,
3925 if (outrel.r_offset == (bfd_vma) -1)
3927 else if (outrel.r_offset == (bfd_vma) -2)
3928 skip = TRUE, relocate = TRUE;
3929 outrel.r_offset += (input_section->output_section->vma
3930 + input_section->output_offset);
3933 memset (&outrel, 0, sizeof outrel);
3936 && (r_type == R_386_PC32
3938 || !SYMBOLIC_BIND (info, h)
3939 || !h->def_regular))
3940 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3943 /* This symbol is local, or marked to become local. */
3945 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3948 sreloc = elf_section_data (input_section)->sreloc;
3950 if (sreloc == NULL || sreloc->contents == NULL)
3952 r = bfd_reloc_notsupported;
3953 goto check_relocation_error;
3956 elf_append_rel (output_bfd, sreloc, &outrel);
3958 /* If this reloc is against an external symbol, we do
3959 not want to fiddle with the addend. Otherwise, we
3960 need to include the symbol value so that it becomes
3961 an addend for the dynamic reloc. */
3968 if (!info->executable)
3970 Elf_Internal_Rela outrel;
3973 outrel.r_offset = rel->r_offset
3974 + input_section->output_section->vma
3975 + input_section->output_offset;
3976 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3977 sreloc = elf_section_data (input_section)->sreloc;
3980 elf_append_rel (output_bfd, sreloc, &outrel);
3985 case R_386_TLS_GOTDESC:
3986 case R_386_TLS_DESC_CALL:
3987 case R_386_TLS_IE_32:
3988 case R_386_TLS_GOTIE:
3989 tls_type = GOT_UNKNOWN;
3990 if (h == NULL && local_got_offsets)
3991 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3993 tls_type = elf_i386_hash_entry(h)->tls_type;
3994 if (tls_type == GOT_TLS_IE)
3995 tls_type = GOT_TLS_IE_NEG;
3997 if (! elf_i386_tls_transition (info, input_bfd,
3998 input_section, contents,
3999 symtab_hdr, sym_hashes,
4000 &r_type, tls_type, rel,
4001 relend, h, r_symndx))
4004 if (r_type == R_386_TLS_LE_32)
4006 BFD_ASSERT (! unresolved_reloc);
4007 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4012 /* GD->LE transition. */
4013 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4016 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4018 movl %gs:0, %eax; subl $foo@tpoff, %eax
4019 (6 byte form of subl). */
4020 memcpy (contents + rel->r_offset - 3,
4021 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4022 roff = rel->r_offset + 5;
4026 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4028 movl %gs:0, %eax; subl $foo@tpoff, %eax
4029 (6 byte form of subl). */
4030 memcpy (contents + rel->r_offset - 2,
4031 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4032 roff = rel->r_offset + 6;
4034 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4036 /* Skip R_386_PC32/R_386_PLT32. */
4040 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4042 /* GDesc -> LE transition.
4043 It's originally something like:
4044 leal x@tlsdesc(%ebx), %eax
4048 Registers other than %eax may be set up here. */
4053 roff = rel->r_offset;
4054 val = bfd_get_8 (input_bfd, contents + roff - 1);
4056 /* Now modify the instruction as appropriate. */
4057 /* aoliva FIXME: remove the above and xor the byte
4059 bfd_put_8 (output_bfd, val ^ 0x86,
4060 contents + roff - 1);
4061 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4065 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4067 /* GDesc -> LE transition.
4075 roff = rel->r_offset;
4076 bfd_put_8 (output_bfd, 0x66, contents + roff);
4077 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4080 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4084 /* IE->LE transition:
4085 Originally it can be one of:
4093 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4096 /* movl foo, %eax. */
4097 bfd_put_8 (output_bfd, 0xb8,
4098 contents + rel->r_offset - 1);
4104 type = bfd_get_8 (input_bfd,
4105 contents + rel->r_offset - 2);
4110 bfd_put_8 (output_bfd, 0xc7,
4111 contents + rel->r_offset - 2);
4112 bfd_put_8 (output_bfd,
4113 0xc0 | ((val >> 3) & 7),
4114 contents + rel->r_offset - 1);
4118 bfd_put_8 (output_bfd, 0x81,
4119 contents + rel->r_offset - 2);
4120 bfd_put_8 (output_bfd,
4121 0xc0 | ((val >> 3) & 7),
4122 contents + rel->r_offset - 1);
4129 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4130 contents + rel->r_offset);
4135 unsigned int val, type;
4137 /* {IE_32,GOTIE}->LE transition:
4138 Originally it can be one of:
4139 subl foo(%reg1), %reg2
4140 movl foo(%reg1), %reg2
4141 addl foo(%reg1), %reg2
4144 movl $foo, %reg2 (6 byte form)
4145 addl $foo, %reg2. */
4146 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4147 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4151 bfd_put_8 (output_bfd, 0xc7,
4152 contents + rel->r_offset - 2);
4153 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4154 contents + rel->r_offset - 1);
4156 else if (type == 0x2b)
4159 bfd_put_8 (output_bfd, 0x81,
4160 contents + rel->r_offset - 2);
4161 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4162 contents + rel->r_offset - 1);
4164 else if (type == 0x03)
4167 bfd_put_8 (output_bfd, 0x81,
4168 contents + rel->r_offset - 2);
4169 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4170 contents + rel->r_offset - 1);
4174 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4175 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4176 contents + rel->r_offset);
4178 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4179 contents + rel->r_offset);
4184 if (htab->elf.sgot == NULL)
4189 off = h->got.offset;
4190 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4194 if (local_got_offsets == NULL)
4197 off = local_got_offsets[r_symndx];
4198 offplt = local_tlsdesc_gotents[r_symndx];
4205 Elf_Internal_Rela outrel;
4209 if (htab->elf.srelgot == NULL)
4212 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4214 if (GOT_TLS_GDESC_P (tls_type))
4217 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4218 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4219 <= htab->elf.sgotplt->size);
4220 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4221 + htab->elf.sgotplt->output_offset
4223 + htab->sgotplt_jump_table_size);
4224 sreloc = htab->elf.srelplt;
4225 loc = sreloc->contents;
4226 loc += (htab->next_tls_desc_index++
4227 * sizeof (Elf32_External_Rel));
4228 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4229 <= sreloc->contents + sreloc->size);
4230 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4233 BFD_ASSERT (! unresolved_reloc);
4234 bfd_put_32 (output_bfd,
4235 relocation - elf_i386_dtpoff_base (info),
4236 htab->elf.sgotplt->contents + offplt
4237 + htab->sgotplt_jump_table_size + 4);
4241 bfd_put_32 (output_bfd, 0,
4242 htab->elf.sgotplt->contents + offplt
4243 + htab->sgotplt_jump_table_size + 4);
4247 sreloc = htab->elf.srelgot;
4249 outrel.r_offset = (htab->elf.sgot->output_section->vma
4250 + htab->elf.sgot->output_offset + off);
4252 if (GOT_TLS_GD_P (tls_type))
4253 dr_type = R_386_TLS_DTPMOD32;
4254 else if (GOT_TLS_GDESC_P (tls_type))
4256 else if (tls_type == GOT_TLS_IE_POS)
4257 dr_type = R_386_TLS_TPOFF;
4259 dr_type = R_386_TLS_TPOFF32;
4261 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4262 bfd_put_32 (output_bfd,
4263 relocation - elf_i386_dtpoff_base (info),
4264 htab->elf.sgot->contents + off);
4265 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4266 bfd_put_32 (output_bfd,
4267 elf_i386_dtpoff_base (info) - relocation,
4268 htab->elf.sgot->contents + off);
4269 else if (dr_type != R_386_TLS_DESC)
4270 bfd_put_32 (output_bfd, 0,
4271 htab->elf.sgot->contents + off);
4272 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4274 elf_append_rel (output_bfd, sreloc, &outrel);
4276 if (GOT_TLS_GD_P (tls_type))
4280 BFD_ASSERT (! unresolved_reloc);
4281 bfd_put_32 (output_bfd,
4282 relocation - elf_i386_dtpoff_base (info),
4283 htab->elf.sgot->contents + off + 4);
4287 bfd_put_32 (output_bfd, 0,
4288 htab->elf.sgot->contents + off + 4);
4289 outrel.r_info = ELF32_R_INFO (indx,
4290 R_386_TLS_DTPOFF32);
4291 outrel.r_offset += 4;
4292 elf_append_rel (output_bfd, sreloc, &outrel);
4295 else if (tls_type == GOT_TLS_IE_BOTH)
4297 bfd_put_32 (output_bfd,
4299 ? relocation - elf_i386_dtpoff_base (info)
4301 htab->elf.sgot->contents + off + 4);
4302 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4303 outrel.r_offset += 4;
4304 elf_append_rel (output_bfd, sreloc, &outrel);
4311 local_got_offsets[r_symndx] |= 1;
4314 if (off >= (bfd_vma) -2
4315 && ! GOT_TLS_GDESC_P (tls_type))
4317 if (r_type == R_386_TLS_GOTDESC
4318 || r_type == R_386_TLS_DESC_CALL)
4320 relocation = htab->sgotplt_jump_table_size + offplt;
4321 unresolved_reloc = FALSE;
4323 else if (r_type == ELF32_R_TYPE (rel->r_info))
4325 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4326 + htab->elf.sgotplt->output_offset;
4327 relocation = htab->elf.sgot->output_section->vma
4328 + htab->elf.sgot->output_offset + off - g_o_t;
4329 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4330 && tls_type == GOT_TLS_IE_BOTH)
4332 if (r_type == R_386_TLS_IE)
4333 relocation += g_o_t;
4334 unresolved_reloc = FALSE;
4336 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4338 unsigned int val, type;
4341 /* GD->IE transition. */
4342 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4343 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4346 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4348 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4350 roff = rel->r_offset - 3;
4354 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4356 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4357 roff = rel->r_offset - 2;
4359 memcpy (contents + roff,
4360 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4361 contents[roff + 7] = 0x80 | (val & 7);
4362 /* If foo is used only with foo@gotntpoff(%reg) and
4363 foo@indntpoff, but not with foo@gottpoff(%reg), change
4364 subl $foo@gottpoff(%reg), %eax
4366 addl $foo@gotntpoff(%reg), %eax. */
4367 if (tls_type == GOT_TLS_IE_POS)
4368 contents[roff + 6] = 0x03;
4369 bfd_put_32 (output_bfd,
4370 htab->elf.sgot->output_section->vma
4371 + htab->elf.sgot->output_offset + off
4372 - htab->elf.sgotplt->output_section->vma
4373 - htab->elf.sgotplt->output_offset,
4374 contents + roff + 8);
4375 /* Skip R_386_PLT32. */
4379 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4381 /* GDesc -> IE transition.
4382 It's originally something like:
4383 leal x@tlsdesc(%ebx), %eax
4386 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4388 movl x@gottpoff(%ebx), %eax # before negl %eax
4390 Registers other than %eax may be set up here. */
4394 /* First, make sure it's a leal adding ebx to a 32-bit
4395 offset into any register, although it's probably
4396 almost always going to be eax. */
4397 roff = rel->r_offset;
4399 /* Now modify the instruction as appropriate. */
4400 /* To turn a leal into a movl in the form we use it, it
4401 suffices to change the first byte from 0x8d to 0x8b.
4402 aoliva FIXME: should we decide to keep the leal, all
4403 we have to do is remove the statement below, and
4404 adjust the relaxation of R_386_TLS_DESC_CALL. */
4405 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4407 if (tls_type == GOT_TLS_IE_BOTH)
4410 bfd_put_32 (output_bfd,
4411 htab->elf.sgot->output_section->vma
4412 + htab->elf.sgot->output_offset + off
4413 - htab->elf.sgotplt->output_section->vma
4414 - htab->elf.sgotplt->output_offset,
4418 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4420 /* GDesc -> IE transition.
4428 depending on how we transformed the TLS_GOTDESC above.
4433 roff = rel->r_offset;
4435 /* Now modify the instruction as appropriate. */
4436 if (tls_type != GOT_TLS_IE_NEG)
4439 bfd_put_8 (output_bfd, 0x66, contents + roff);
4440 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4445 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4446 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4456 if (! elf_i386_tls_transition (info, input_bfd,
4457 input_section, contents,
4458 symtab_hdr, sym_hashes,
4459 &r_type, GOT_UNKNOWN, rel,
4460 relend, h, r_symndx))
4463 if (r_type != R_386_TLS_LDM)
4465 /* LD->LE transition:
4466 leal foo(%reg), %eax; call ___tls_get_addr.
4468 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4469 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4470 memcpy (contents + rel->r_offset - 2,
4471 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4472 /* Skip R_386_PC32/R_386_PLT32. */
4477 if (htab->elf.sgot == NULL)
4480 off = htab->tls_ldm_got.offset;
4485 Elf_Internal_Rela outrel;
4487 if (htab->elf.srelgot == NULL)
4490 outrel.r_offset = (htab->elf.sgot->output_section->vma
4491 + htab->elf.sgot->output_offset + off);
4493 bfd_put_32 (output_bfd, 0,
4494 htab->elf.sgot->contents + off);
4495 bfd_put_32 (output_bfd, 0,
4496 htab->elf.sgot->contents + off + 4);
4497 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4498 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4499 htab->tls_ldm_got.offset |= 1;
4501 relocation = htab->elf.sgot->output_section->vma
4502 + htab->elf.sgot->output_offset + off
4503 - htab->elf.sgotplt->output_section->vma
4504 - htab->elf.sgotplt->output_offset;
4505 unresolved_reloc = FALSE;
4508 case R_386_TLS_LDO_32:
4509 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
4510 relocation -= elf_i386_dtpoff_base (info);
4512 /* When converting LDO to LE, we must negate. */
4513 relocation = -elf_i386_tpoff (info, relocation);
4516 case R_386_TLS_LE_32:
4518 if (!info->executable)
4520 Elf_Internal_Rela outrel;
4523 outrel.r_offset = rel->r_offset
4524 + input_section->output_section->vma
4525 + input_section->output_offset;
4526 if (h != NULL && h->dynindx != -1)
4530 if (r_type == R_386_TLS_LE_32)
4531 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4533 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4534 sreloc = elf_section_data (input_section)->sreloc;
4537 elf_append_rel (output_bfd, sreloc, &outrel);
4540 else if (r_type == R_386_TLS_LE_32)
4541 relocation = elf_i386_dtpoff_base (info) - relocation;
4543 relocation -= elf_i386_dtpoff_base (info);
4545 else if (r_type == R_386_TLS_LE_32)
4546 relocation = elf_i386_tpoff (info, relocation);
4548 relocation = -elf_i386_tpoff (info, relocation);
4555 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4556 because such sections are not SEC_ALLOC and thus ld.so will
4557 not process them. */
4558 if (unresolved_reloc
4559 && !((input_section->flags & SEC_DEBUGGING) != 0
4561 && _bfd_elf_section_offset (output_bfd, info, input_section,
4562 rel->r_offset) != (bfd_vma) -1)
4564 (*_bfd_error_handler)
4565 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4568 (long) rel->r_offset,
4570 h->root.root.string);
4575 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4576 contents, rel->r_offset,
4579 check_relocation_error:
4580 if (r != bfd_reloc_ok)
4585 name = h->root.root.string;
4588 name = bfd_elf_string_from_elf_section (input_bfd,
4589 symtab_hdr->sh_link,
4594 name = bfd_section_name (input_bfd, sec);
4597 if (r == bfd_reloc_overflow)
4599 if (! ((*info->callbacks->reloc_overflow)
4600 (info, (h ? &h->root : NULL), name, howto->name,
4601 (bfd_vma) 0, input_bfd, input_section,
4607 (*_bfd_error_handler)
4608 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4609 input_bfd, input_section,
4610 (long) rel->r_offset, name, (int) r);
4619 /* Finish up dynamic symbol handling. We set the contents of various
4620 dynamic sections here. */
4623 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4624 struct bfd_link_info *info,
4625 struct elf_link_hash_entry *h,
4626 Elf_Internal_Sym *sym)
4628 struct elf_i386_link_hash_table *htab;
4629 unsigned plt_entry_size;
4630 const struct elf_i386_backend_data *abed;
4631 struct elf_i386_link_hash_entry *eh;
4633 htab = elf_i386_hash_table (info);
4637 abed = get_elf_i386_backend_data (output_bfd);
4638 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
4640 eh = (struct elf_i386_link_hash_entry *) h;
4642 if (h->plt.offset != (bfd_vma) -1)
4646 Elf_Internal_Rela rel;
4648 asection *plt, *gotplt, *relplt;
4650 /* When building a static executable, use .iplt, .igot.plt and
4651 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4652 if (htab->elf.splt != NULL)
4654 plt = htab->elf.splt;
4655 gotplt = htab->elf.sgotplt;
4656 relplt = htab->elf.srelplt;
4660 plt = htab->elf.iplt;
4661 gotplt = htab->elf.igotplt;
4662 relplt = htab->elf.irelplt;
4665 /* This symbol has an entry in the procedure linkage table. Set
4668 if ((h->dynindx == -1
4669 && !((h->forced_local || info->executable)
4671 && h->type == STT_GNU_IFUNC))
4677 /* Get the index in the procedure linkage table which
4678 corresponds to this symbol. This is the index of this symbol
4679 in all the symbols for which we are making plt entries. The
4680 first entry in the procedure linkage table is reserved.
4682 Get the offset into the .got table of the entry that
4683 corresponds to this function. Each .got entry is 4 bytes.
4684 The first three are reserved.
4686 For static executables, we don't reserve anything. */
4688 if (plt == htab->elf.splt)
4690 got_offset = h->plt.offset / plt_entry_size - 1;
4691 got_offset = (got_offset + 3) * 4;
4695 got_offset = h->plt.offset / plt_entry_size;
4696 got_offset = got_offset * 4;
4699 /* Fill in the entry in the procedure linkage table. */
4702 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
4703 abed->plt->plt_entry_size);
4704 bfd_put_32 (output_bfd,
4705 (gotplt->output_section->vma
4706 + gotplt->output_offset
4708 plt->contents + h->plt.offset
4709 + abed->plt->plt_got_offset);
4711 if (abed->is_vxworks)
4713 int s, k, reloc_index;
4715 /* Create the R_386_32 relocation referencing the GOT
4716 for this PLT entry. */
4718 /* S: Current slot number (zero-based). */
4719 s = ((h->plt.offset - abed->plt->plt_entry_size)
4720 / abed->plt->plt_entry_size);
4721 /* K: Number of relocations for PLTResolve. */
4723 k = PLTRESOLVE_RELOCS_SHLIB;
4725 k = PLTRESOLVE_RELOCS;
4726 /* Skip the PLTresolve relocations, and the relocations for
4727 the other PLT slots. */
4728 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4729 loc = (htab->srelplt2->contents + reloc_index
4730 * sizeof (Elf32_External_Rel));
4732 rel.r_offset = (htab->elf.splt->output_section->vma
4733 + htab->elf.splt->output_offset
4734 + h->plt.offset + 2),
4735 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4736 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4738 /* Create the R_386_32 relocation referencing the beginning of
4739 the PLT for this GOT entry. */
4740 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4741 + htab->elf.sgotplt->output_offset
4743 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4744 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4745 loc + sizeof (Elf32_External_Rel));
4750 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
4751 abed->plt->plt_entry_size);
4752 bfd_put_32 (output_bfd, got_offset,
4753 plt->contents + h->plt.offset
4754 + abed->plt->plt_got_offset);
4757 /* Fill in the entry in the global offset table. */
4758 bfd_put_32 (output_bfd,
4759 (plt->output_section->vma
4760 + plt->output_offset
4762 + abed->plt->plt_lazy_offset),
4763 gotplt->contents + got_offset);
4765 /* Fill in the entry in the .rel.plt section. */
4766 rel.r_offset = (gotplt->output_section->vma
4767 + gotplt->output_offset
4769 if (h->dynindx == -1
4770 || ((info->executable
4771 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4773 && h->type == STT_GNU_IFUNC))
4775 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4776 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4777 in the .got.plt section. */
4778 bfd_put_32 (output_bfd,
4779 (h->root.u.def.value
4780 + h->root.u.def.section->output_section->vma
4781 + h->root.u.def.section->output_offset),
4782 gotplt->contents + got_offset);
4783 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4784 /* R_386_IRELATIVE comes last. */
4785 plt_index = htab->next_irelative_index--;
4789 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4790 plt_index = htab->next_jump_slot_index++;
4792 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4793 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4795 /* Don't fill PLT entry for static executables. */
4796 if (plt == htab->elf.splt)
4798 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4799 plt->contents + h->plt.offset
4800 + abed->plt->plt_reloc_offset);
4801 bfd_put_32 (output_bfd, - (h->plt.offset
4802 + abed->plt->plt_plt_offset + 4),
4803 plt->contents + h->plt.offset
4804 + abed->plt->plt_plt_offset);
4807 else if (eh->plt_got.offset != (bfd_vma) -1)
4809 bfd_vma got_offset, plt_offset;
4810 asection *plt, *got, *gotplt;
4811 const bfd_byte *got_plt_entry;
4813 /* Offset of displacement of the indirect jump. */
4814 bfd_vma plt_got_offset = 2;
4816 /* Set the entry in the GOT procedure linkage table. */
4817 plt = htab->plt_got;
4818 got = htab->elf.sgot;
4819 gotplt = htab->elf.sgotplt;
4820 got_offset = h->got.offset;
4822 if (got_offset == (bfd_vma) -1
4828 /* Fill in the entry in the GOT procedure linkage table. */
4831 got_plt_entry = elf_i386_got_plt_entry;
4832 got_offset += got->output_section->vma + got->output_offset;
4836 got_plt_entry = elf_i386_pic_got_plt_entry;
4837 got_offset += (got->output_section->vma
4838 + got->output_offset
4839 - gotplt->output_section->vma
4840 - gotplt->output_offset);
4843 plt_offset = eh->plt_got.offset;
4844 memcpy (plt->contents + plt_offset, got_plt_entry,
4845 sizeof (elf_i386_got_plt_entry));
4846 bfd_put_32 (output_bfd, got_offset,
4847 plt->contents + plt_offset + plt_got_offset);
4851 && (h->plt.offset != (bfd_vma) -1
4852 || eh->plt_got.offset != (bfd_vma) -1))
4854 /* Mark the symbol as undefined, rather than as defined in
4855 the .plt section. Leave the value if there were any
4856 relocations where pointer equality matters (this is a clue
4857 for the dynamic linker, to make function pointer
4858 comparisons work between an application and shared
4859 library), otherwise set it to zero. If a function is only
4860 called from a binary, there is no need to slow down
4861 shared libraries because of that. */
4862 sym->st_shndx = SHN_UNDEF;
4863 if (!h->pointer_equality_needed)
4867 if (h->got.offset != (bfd_vma) -1
4868 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4869 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4871 Elf_Internal_Rela rel;
4873 /* This symbol has an entry in the global offset table. Set it
4876 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4879 rel.r_offset = (htab->elf.sgot->output_section->vma
4880 + htab->elf.sgot->output_offset
4881 + (h->got.offset & ~(bfd_vma) 1));
4883 /* If this is a static link, or it is a -Bsymbolic link and the
4884 symbol is defined locally or was forced to be local because
4885 of a version file, we just want to emit a RELATIVE reloc.
4886 The entry in the global offset table will already have been
4887 initialized in the relocate_section function. */
4889 && h->type == STT_GNU_IFUNC)
4893 /* Generate R_386_GLOB_DAT. */
4900 if (!h->pointer_equality_needed)
4903 /* For non-shared object, we can't use .got.plt, which
4904 contains the real function addres if we need pointer
4905 equality. We load the GOT entry with the PLT entry. */
4906 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4907 bfd_put_32 (output_bfd,
4908 (plt->output_section->vma
4909 + plt->output_offset + h->plt.offset),
4910 htab->elf.sgot->contents + h->got.offset);
4914 else if (info->shared
4915 && SYMBOL_REFERENCES_LOCAL (info, h))
4917 BFD_ASSERT((h->got.offset & 1) != 0);
4918 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4922 BFD_ASSERT((h->got.offset & 1) == 0);
4924 bfd_put_32 (output_bfd, (bfd_vma) 0,
4925 htab->elf.sgot->contents + h->got.offset);
4926 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4929 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
4934 Elf_Internal_Rela rel;
4936 /* This symbol needs a copy reloc. Set it up. */
4938 if (h->dynindx == -1
4939 || (h->root.type != bfd_link_hash_defined
4940 && h->root.type != bfd_link_hash_defweak)
4941 || htab->srelbss == NULL)
4944 rel.r_offset = (h->root.u.def.value
4945 + h->root.u.def.section->output_section->vma
4946 + h->root.u.def.section->output_offset);
4947 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4948 elf_append_rel (output_bfd, htab->srelbss, &rel);
4954 /* Finish up local dynamic symbol handling. We set the contents of
4955 various dynamic sections here. */
4958 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4960 struct elf_link_hash_entry *h
4961 = (struct elf_link_hash_entry *) *slot;
4962 struct bfd_link_info *info
4963 = (struct bfd_link_info *) inf;
4965 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4969 /* Used to decide how to sort relocs in an optimal manner for the
4970 dynamic linker, before writing them out. */
4972 static enum elf_reloc_type_class
4973 elf_i386_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4974 const asection *rel_sec ATTRIBUTE_UNUSED,
4975 const Elf_Internal_Rela *rela)
4977 switch (ELF32_R_TYPE (rela->r_info))
4979 case R_386_RELATIVE:
4980 return reloc_class_relative;
4981 case R_386_JUMP_SLOT:
4982 return reloc_class_plt;
4984 return reloc_class_copy;
4986 return reloc_class_normal;
4990 /* Finish up the dynamic sections. */
4993 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4994 struct bfd_link_info *info)
4996 struct elf_i386_link_hash_table *htab;
4999 const struct elf_i386_backend_data *abed;
5001 htab = elf_i386_hash_table (info);
5005 dynobj = htab->elf.dynobj;
5006 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5007 abed = get_elf_i386_backend_data (output_bfd);
5009 if (htab->elf.dynamic_sections_created)
5011 Elf32_External_Dyn *dyncon, *dynconend;
5013 if (sdyn == NULL || htab->elf.sgot == NULL)
5016 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5017 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5018 for (; dyncon < dynconend; dyncon++)
5020 Elf_Internal_Dyn dyn;
5023 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5028 if (abed->is_vxworks
5029 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5034 s = htab->elf.sgotplt;
5035 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5039 s = htab->elf.srelplt;
5040 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5044 s = htab->elf.srelplt;
5045 dyn.d_un.d_val = s->size;
5049 /* My reading of the SVR4 ABI indicates that the
5050 procedure linkage table relocs (DT_JMPREL) should be
5051 included in the overall relocs (DT_REL). This is
5052 what Solaris does. However, UnixWare can not handle
5053 that case. Therefore, we override the DT_RELSZ entry
5054 here to make it not include the JMPREL relocs. */
5055 s = htab->elf.srelplt;
5058 dyn.d_un.d_val -= s->size;
5062 /* We may not be using the standard ELF linker script.
5063 If .rel.plt is the first .rel section, we adjust
5064 DT_REL to not include it. */
5065 s = htab->elf.srelplt;
5068 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
5070 dyn.d_un.d_ptr += s->size;
5074 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5077 /* Fill in the first entry in the procedure linkage table. */
5078 if (htab->elf.splt && htab->elf.splt->size > 0)
5082 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5083 abed->plt->plt0_entry_size);
5084 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5085 abed->plt0_pad_byte,
5086 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5090 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5091 abed->plt->plt0_entry_size);
5092 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5093 abed->plt0_pad_byte,
5094 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5095 bfd_put_32 (output_bfd,
5096 (htab->elf.sgotplt->output_section->vma
5097 + htab->elf.sgotplt->output_offset
5099 htab->elf.splt->contents
5100 + abed->plt->plt0_got1_offset);
5101 bfd_put_32 (output_bfd,
5102 (htab->elf.sgotplt->output_section->vma
5103 + htab->elf.sgotplt->output_offset
5105 htab->elf.splt->contents
5106 + abed->plt->plt0_got2_offset);
5108 if (abed->is_vxworks)
5110 Elf_Internal_Rela rel;
5112 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5113 On IA32 we use REL relocations so the addend goes in
5114 the PLT directly. */
5115 rel.r_offset = (htab->elf.splt->output_section->vma
5116 + htab->elf.splt->output_offset
5117 + abed->plt->plt0_got1_offset);
5118 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5119 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5120 htab->srelplt2->contents);
5121 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5122 rel.r_offset = (htab->elf.splt->output_section->vma
5123 + htab->elf.splt->output_offset
5124 + abed->plt->plt0_got2_offset);
5125 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5126 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5127 htab->srelplt2->contents +
5128 sizeof (Elf32_External_Rel));
5132 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5133 really seem like the right value. */
5134 elf_section_data (htab->elf.splt->output_section)
5135 ->this_hdr.sh_entsize = 4;
5137 /* Correct the .rel.plt.unloaded relocations. */
5138 if (abed->is_vxworks && !info->shared)
5140 int num_plts = (htab->elf.splt->size
5141 / abed->plt->plt_entry_size) - 1;
5144 p = htab->srelplt2->contents;
5146 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5148 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5150 for (; num_plts; num_plts--)
5152 Elf_Internal_Rela rel;
5153 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5154 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5155 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5156 p += sizeof (Elf32_External_Rel);
5158 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5159 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5160 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5161 p += sizeof (Elf32_External_Rel);
5167 if (htab->elf.sgotplt)
5169 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5171 (*_bfd_error_handler)
5172 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5176 /* Fill in the first three entries in the global offset table. */
5177 if (htab->elf.sgotplt->size > 0)
5179 bfd_put_32 (output_bfd,
5181 : sdyn->output_section->vma + sdyn->output_offset),
5182 htab->elf.sgotplt->contents);
5183 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5184 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5187 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5190 /* Adjust .eh_frame for .plt section. */
5191 if (htab->plt_eh_frame != NULL
5192 && htab->plt_eh_frame->contents != NULL)
5194 if (htab->elf.splt != NULL
5195 && htab->elf.splt->size != 0
5196 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5197 && htab->elf.splt->output_section != NULL
5198 && htab->plt_eh_frame->output_section != NULL)
5200 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5201 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5202 + htab->plt_eh_frame->output_offset
5203 + PLT_FDE_START_OFFSET;
5204 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5205 htab->plt_eh_frame->contents
5206 + PLT_FDE_START_OFFSET);
5208 if (htab->plt_eh_frame->sec_info_type
5209 == SEC_INFO_TYPE_EH_FRAME)
5211 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5213 htab->plt_eh_frame->contents))
5218 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5219 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5221 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5222 htab_traverse (htab->loc_hash_table,
5223 elf_i386_finish_local_dynamic_symbol,
5229 /* Return an array of PLT entry symbol values. */
5232 elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5235 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5238 bfd_vma *plt_sym_val;
5240 bfd_byte *plt_contents;
5241 const struct elf_i386_backend_data *bed
5242 = get_elf_i386_backend_data (abfd);
5243 Elf_Internal_Shdr *hdr;
5245 /* Get the .plt section contents. */
5246 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5247 if (plt_contents == NULL)
5249 if (!bfd_get_section_contents (abfd, (asection *) plt,
5250 plt_contents, 0, plt->size))
5253 free (plt_contents);
5257 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5258 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5261 hdr = &elf_section_data (relplt)->this_hdr;
5262 count = relplt->size / hdr->sh_entsize;
5264 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5265 if (plt_sym_val == NULL)
5268 for (i = 0; i < count; i++)
5269 plt_sym_val[i] = -1;
5271 plt_offset = bed->plt->plt_entry_size;
5272 p = relplt->relocation;
5273 for (i = 0; i < count; i++, p++)
5277 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5278 if (p->howto == NULL)
5281 if (p->howto->type != R_386_JUMP_SLOT
5282 && p->howto->type != R_386_IRELATIVE)
5285 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5286 + bed->plt->plt_reloc_offset));
5287 reloc_index /= sizeof (Elf32_External_Rel);
5288 if (reloc_index >= count)
5290 plt_sym_val[reloc_index] = plt->vma + plt_offset;
5291 plt_offset += bed->plt->plt_entry_size;
5293 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5295 if (plt_offset >= plt->size)
5299 free (plt_contents);
5304 /* Similar to _bfd_elf_get_synthetic_symtab. */
5307 elf_i386_get_synthetic_symtab (bfd *abfd,
5314 asection *plt = bfd_get_section_by_name (abfd, ".plt");
5315 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5316 dynsymcount, dynsyms, ret,
5318 elf_i386_get_plt_sym_val);
5321 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5324 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5326 if (h->plt.offset != (bfd_vma) -1
5328 && !h->pointer_equality_needed)
5331 return _bfd_elf_hash_symbol (h);
5334 /* Hook called by the linker routine which adds symbols from an object
5338 elf_i386_add_symbol_hook (bfd * abfd,
5339 struct bfd_link_info * info,
5340 Elf_Internal_Sym * sym,
5341 const char ** namep ATTRIBUTE_UNUSED,
5342 flagword * flagsp ATTRIBUTE_UNUSED,
5343 asection ** secp ATTRIBUTE_UNUSED,
5344 bfd_vma * valp ATTRIBUTE_UNUSED)
5346 if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE
5347 && (abfd->flags & DYNAMIC) == 0
5348 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
5349 elf_tdata (info->output_bfd)->has_gnu_symbols
5350 |= elf_gnu_symbol_unique;
5355 #define TARGET_LITTLE_SYM i386_elf32_vec
5356 #define TARGET_LITTLE_NAME "elf32-i386"
5357 #define ELF_ARCH bfd_arch_i386
5358 #define ELF_TARGET_ID I386_ELF_DATA
5359 #define ELF_MACHINE_CODE EM_386
5360 #define ELF_MAXPAGESIZE 0x1000
5362 #define elf_backend_can_gc_sections 1
5363 #define elf_backend_can_refcount 1
5364 #define elf_backend_want_got_plt 1
5365 #define elf_backend_plt_readonly 1
5366 #define elf_backend_want_plt_sym 0
5367 #define elf_backend_got_header_size 12
5368 #define elf_backend_plt_alignment 4
5369 #define elf_backend_extern_protected_data 1
5371 /* Support RELA for objdump of prelink objects. */
5372 #define elf_info_to_howto elf_i386_info_to_howto_rel
5373 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5375 #define bfd_elf32_mkobject elf_i386_mkobject
5377 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5378 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5379 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5380 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5381 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5383 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5384 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5385 #define elf_backend_check_relocs elf_i386_check_relocs
5386 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5387 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5388 #define elf_backend_fake_sections elf_i386_fake_sections
5389 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5390 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5391 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5392 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5393 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5394 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5395 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5396 #define elf_backend_relocate_section elf_i386_relocate_section
5397 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5398 #define elf_backend_always_size_sections elf_i386_always_size_sections
5399 #define elf_backend_omit_section_dynsym \
5400 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5401 #define elf_backend_hash_symbol elf_i386_hash_symbol
5402 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5404 #include "elf32-target.h"
5406 /* FreeBSD support. */
5408 #undef TARGET_LITTLE_SYM
5409 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5410 #undef TARGET_LITTLE_NAME
5411 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5413 #define ELF_OSABI ELFOSABI_FREEBSD
5415 /* The kernel recognizes executables as valid only if they carry a
5416 "FreeBSD" label in the ELF header. So we put this label on all
5417 executables and (for simplicity) also all other object files. */
5420 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5422 _bfd_elf_post_process_headers (abfd, info);
5424 #ifdef OLD_FREEBSD_ABI_LABEL
5426 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5427 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5428 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5433 #undef elf_backend_post_process_headers
5434 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5436 #define elf32_bed elf32_i386_fbsd_bed
5438 #undef elf_backend_add_symbol_hook
5440 #include "elf32-target.h"
5444 #undef TARGET_LITTLE_SYM
5445 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5446 #undef TARGET_LITTLE_NAME
5447 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5449 #undef elf_backend_post_process_headers
5451 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5452 objects won't be recognized. */
5456 #define elf32_bed elf32_i386_sol2_bed
5458 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5460 #undef elf_backend_static_tls_alignment
5461 #define elf_backend_static_tls_alignment 8
5463 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5465 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5467 #undef elf_backend_want_plt_sym
5468 #define elf_backend_want_plt_sym 1
5470 #include "elf32-target.h"
5472 /* Intel MCU support. */
5475 elf32_iamcu_elf_object_p (bfd *abfd)
5477 /* Set the right machine number for an IAMCU elf32 file. */
5478 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5482 #undef TARGET_LITTLE_SYM
5483 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5484 #undef TARGET_LITTLE_NAME
5485 #define TARGET_LITTLE_NAME "elf32-iamcu"
5487 #define ELF_ARCH bfd_arch_iamcu
5489 #undef ELF_MACHINE_CODE
5490 #define ELF_MACHINE_CODE EM_IAMCU
5495 #define elf32_bed elf32_iamcu_bed
5497 #undef elf_backend_object_p
5498 #define elf_backend_object_p elf32_iamcu_elf_object_p
5500 #undef elf_backend_static_tls_alignment
5502 #undef elf_backend_want_plt_sym
5503 #define elf_backend_want_plt_sym 0
5505 #include "elf32-target.h"
5507 /* Restore defaults. */
5509 #define ELF_ARCH bfd_arch_i386
5510 #undef ELF_MACHINE_CODE
5511 #define ELF_MACHINE_CODE EM_386
5513 /* Native Client support. */
5515 #undef TARGET_LITTLE_SYM
5516 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5517 #undef TARGET_LITTLE_NAME
5518 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5520 #define elf32_bed elf32_i386_nacl_bed
5522 #undef ELF_MAXPAGESIZE
5523 #define ELF_MAXPAGESIZE 0x10000
5525 /* Restore defaults. */
5527 #undef elf_backend_want_plt_sym
5528 #define elf_backend_want_plt_sym 0
5529 #undef elf_backend_post_process_headers
5530 #undef elf_backend_static_tls_alignment
5532 /* NaCl uses substantially different PLT entries for the same effects. */
5534 #undef elf_backend_plt_alignment
5535 #define elf_backend_plt_alignment 5
5536 #define NACL_PLT_ENTRY_SIZE 64
5537 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5539 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5541 0xff, 0x35, /* pushl contents of address */
5542 0, 0, 0, 0, /* replaced with address of .got + 4. */
5543 0x8b, 0x0d, /* movl contents of address, %ecx */
5544 0, 0, 0, 0, /* replaced with address of .got + 8. */
5545 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5546 0xff, 0xe1 /* jmp *%ecx */
5549 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5551 0x8b, 0x0d, /* movl contents of address, %ecx */
5552 0, 0, 0, 0, /* replaced with GOT slot address. */
5553 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5554 0xff, 0xe1, /* jmp *%ecx */
5556 /* Pad to the next 32-byte boundary with nop instructions. */
5558 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5559 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5561 /* Lazy GOT entries point here (32-byte aligned). */
5562 0x68, /* pushl immediate */
5563 0, 0, 0, 0, /* replaced with reloc offset. */
5564 0xe9, /* jmp relative */
5565 0, 0, 0, 0, /* replaced with offset to .plt. */
5567 /* Pad to the next 32-byte boundary with nop instructions. */
5568 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5569 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5573 static const bfd_byte
5574 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5576 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5577 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5578 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5579 0xff, 0xe1, /* jmp *%ecx */
5581 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5582 so pad to that size with nop instructions. */
5583 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5586 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5588 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5589 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5590 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5591 0xff, 0xe1, /* jmp *%ecx */
5593 /* Pad to the next 32-byte boundary with nop instructions. */
5595 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5596 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5598 /* Lazy GOT entries point here (32-byte aligned). */
5599 0x68, /* pushl immediate */
5600 0, 0, 0, 0, /* replaced with offset into relocation table. */
5601 0xe9, /* jmp relative */
5602 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5604 /* Pad to the next 32-byte boundary with nop instructions. */
5605 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5606 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5610 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5612 #if (PLT_CIE_LENGTH != 20 \
5613 || PLT_FDE_LENGTH != 36 \
5614 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5615 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5616 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5618 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5619 0, 0, 0, 0, /* CIE ID */
5620 1, /* CIE version */
5621 'z', 'R', 0, /* Augmentation string */
5622 1, /* Code alignment factor */
5623 0x7c, /* Data alignment factor: -4 */
5624 8, /* Return address column */
5625 1, /* Augmentation size */
5626 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5627 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5628 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5629 DW_CFA_nop, DW_CFA_nop,
5631 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5632 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5633 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5634 0, 0, 0, 0, /* .plt size goes here */
5635 0, /* Augmentation size */
5636 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5637 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5638 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5639 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5640 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5641 13, /* Block length */
5642 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5643 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5644 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5645 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5646 DW_CFA_nop, DW_CFA_nop
5649 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
5651 elf_i386_nacl_plt0_entry, /* plt0_entry */
5652 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5653 2, /* plt0_got1_offset */
5654 8, /* plt0_got2_offset */
5655 elf_i386_nacl_plt_entry, /* plt_entry */
5656 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5657 2, /* plt_got_offset */
5658 33, /* plt_reloc_offset */
5659 38, /* plt_plt_offset */
5660 32, /* plt_lazy_offset */
5661 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5662 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5663 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5664 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
5667 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5669 &elf_i386_nacl_plt, /* plt */
5670 0x90, /* plt0_pad_byte: nop insn */
5675 elf32_i386_nacl_elf_object_p (bfd *abfd)
5677 /* Set the right machine number for a NaCl i386 ELF32 file. */
5678 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
5682 #undef elf_backend_arch_data
5683 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5685 #undef elf_backend_object_p
5686 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5687 #undef elf_backend_modify_segment_map
5688 #define elf_backend_modify_segment_map nacl_modify_segment_map
5689 #undef elf_backend_modify_program_headers
5690 #define elf_backend_modify_program_headers nacl_modify_program_headers
5691 #undef elf_backend_final_write_processing
5692 #define elf_backend_final_write_processing nacl_final_write_processing
5694 #include "elf32-target.h"
5696 /* Restore defaults. */
5697 #undef elf_backend_object_p
5698 #undef elf_backend_modify_segment_map
5699 #undef elf_backend_modify_program_headers
5700 #undef elf_backend_final_write_processing
5702 /* VxWorks support. */
5704 #undef TARGET_LITTLE_SYM
5705 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5706 #undef TARGET_LITTLE_NAME
5707 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5709 #undef elf_backend_plt_alignment
5710 #define elf_backend_plt_alignment 4
5712 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5714 &elf_i386_plt, /* plt */
5715 0x90, /* plt0_pad_byte */
5719 #undef elf_backend_arch_data
5720 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5722 #undef elf_backend_relocs_compatible
5723 #undef elf_backend_add_symbol_hook
5724 #define elf_backend_add_symbol_hook \
5725 elf_vxworks_add_symbol_hook
5726 #undef elf_backend_link_output_symbol_hook
5727 #define elf_backend_link_output_symbol_hook \
5728 elf_vxworks_link_output_symbol_hook
5729 #undef elf_backend_emit_relocs
5730 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5731 #undef elf_backend_final_write_processing
5732 #define elf_backend_final_write_processing \
5733 elf_vxworks_final_write_processing
5734 #undef elf_backend_static_tls_alignment
5736 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5738 #undef elf_backend_want_plt_sym
5739 #define elf_backend_want_plt_sym 1
5742 #define elf32_bed elf32_i386_vxworks_bed
5744 #include "elf32-target.h"