1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2014 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 /* .eh_frame covering the .plt section. */
587 static const bfd_byte elf_i386_eh_frame_plt[] =
589 #define PLT_CIE_LENGTH 20
590 #define PLT_FDE_LENGTH 36
591 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
592 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
593 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
594 0, 0, 0, 0, /* CIE ID */
596 'z', 'R', 0, /* Augmentation string */
597 1, /* Code alignment factor */
598 0x7c, /* Data alignment factor */
599 8, /* Return address column */
600 1, /* Augmentation size */
601 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
602 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
603 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
604 DW_CFA_nop, DW_CFA_nop,
606 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
607 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
608 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
609 0, 0, 0, 0, /* .plt size goes here */
610 0, /* Augmentation size */
611 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
612 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
613 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
614 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
615 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
616 11, /* Block length */
617 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
618 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
619 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
620 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
621 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
624 struct elf_i386_plt_layout
626 /* The first entry in an absolute procedure linkage table looks like this. */
627 const bfd_byte *plt0_entry;
628 unsigned int plt0_entry_size;
630 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
631 unsigned int plt0_got1_offset;
632 unsigned int plt0_got2_offset;
634 /* Later entries in an absolute procedure linkage table look like this. */
635 const bfd_byte *plt_entry;
636 unsigned int plt_entry_size;
638 /* Offsets into plt_entry that are to be replaced with... */
639 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
640 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
641 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
643 /* Offset into plt_entry where the initial value of the GOT entry points. */
644 unsigned int plt_lazy_offset;
646 /* The first entry in a PIC procedure linkage table looks like this. */
647 const bfd_byte *pic_plt0_entry;
649 /* Subsequent entries in a PIC procedure linkage table look like this. */
650 const bfd_byte *pic_plt_entry;
652 /* .eh_frame covering the .plt section. */
653 const bfd_byte *eh_frame_plt;
654 unsigned int eh_frame_plt_size;
657 #define GET_PLT_ENTRY_SIZE(abfd) \
658 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
660 /* These are the standard parameters. */
661 static const struct elf_i386_plt_layout elf_i386_plt =
663 elf_i386_plt0_entry, /* plt0_entry */
664 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
665 2, /* plt0_got1_offset */
666 8, /* plt0_got2_offset */
667 elf_i386_plt_entry, /* plt_entry */
668 PLT_ENTRY_SIZE, /* plt_entry_size */
669 2, /* plt_got_offset */
670 7, /* plt_reloc_offset */
671 12, /* plt_plt_offset */
672 6, /* plt_lazy_offset */
673 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
674 elf_i386_pic_plt_entry, /* pic_plt_entry */
675 elf_i386_eh_frame_plt, /* eh_frame_plt */
676 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
680 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
681 for the PLTResolve stub and then for each PLT entry. */
682 #define PLTRESOLVE_RELOCS_SHLIB 0
683 #define PLTRESOLVE_RELOCS 2
684 #define PLT_NON_JUMP_SLOT_RELOCS 2
686 /* Architecture-specific backend data for i386. */
688 struct elf_i386_backend_data
690 /* Parameters describing PLT generation. */
691 const struct elf_i386_plt_layout *plt;
693 /* Value used to fill the unused bytes of the first PLT entry. */
694 bfd_byte plt0_pad_byte;
696 /* True if the target system is VxWorks. */
700 #define get_elf_i386_backend_data(abfd) \
701 ((const struct elf_i386_backend_data *) \
702 get_elf_backend_data (abfd)->arch_data)
704 /* These are the standard parameters. */
705 static const struct elf_i386_backend_data elf_i386_arch_bed =
707 &elf_i386_plt, /* plt */
708 0, /* plt0_pad_byte */
712 #define elf_backend_arch_data &elf_i386_arch_bed
714 /* i386 ELF linker hash entry. */
716 struct elf_i386_link_hash_entry
718 struct elf_link_hash_entry elf;
720 /* Track dynamic relocs copied for this symbol. */
721 struct elf_dyn_relocs *dyn_relocs;
723 #define GOT_UNKNOWN 0
727 #define GOT_TLS_IE_POS 5
728 #define GOT_TLS_IE_NEG 6
729 #define GOT_TLS_IE_BOTH 7
730 #define GOT_TLS_GDESC 8
731 #define GOT_TLS_GD_BOTH_P(type) \
732 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
733 #define GOT_TLS_GD_P(type) \
734 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
735 #define GOT_TLS_GDESC_P(type) \
736 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
737 #define GOT_TLS_GD_ANY_P(type) \
738 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
739 unsigned char tls_type;
741 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
742 starting at the end of the jump table. */
746 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
748 struct elf_i386_obj_tdata
750 struct elf_obj_tdata root;
752 /* tls_type for each local got entry. */
753 char *local_got_tls_type;
755 /* GOTPLT entries for TLS descriptors. */
756 bfd_vma *local_tlsdesc_gotent;
759 #define elf_i386_tdata(abfd) \
760 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
762 #define elf_i386_local_got_tls_type(abfd) \
763 (elf_i386_tdata (abfd)->local_got_tls_type)
765 #define elf_i386_local_tlsdesc_gotent(abfd) \
766 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
768 #define is_i386_elf(bfd) \
769 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
770 && elf_tdata (bfd) != NULL \
771 && elf_object_id (bfd) == I386_ELF_DATA)
774 elf_i386_mkobject (bfd *abfd)
776 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
780 /* i386 ELF linker hash table. */
782 struct elf_i386_link_hash_table
784 struct elf_link_hash_table elf;
786 /* Short-cuts to get to dynamic linker sections. */
789 asection *plt_eh_frame;
793 bfd_signed_vma refcount;
797 /* The amount of space used by the reserved portion of the sgotplt
798 section, plus whatever space is used by the jump slots. */
799 bfd_vma sgotplt_jump_table_size;
801 /* Small local sym cache. */
802 struct sym_cache sym_cache;
804 /* _TLS_MODULE_BASE_ symbol. */
805 struct bfd_link_hash_entry *tls_module_base;
807 /* Used by local STT_GNU_IFUNC symbols. */
808 htab_t loc_hash_table;
809 void * loc_hash_memory;
811 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
814 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
815 bfd_vma next_tls_desc_index;
817 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
818 bfd_vma next_jump_slot_index;
820 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
821 bfd_vma next_irelative_index;
824 /* Get the i386 ELF linker hash table from a link_info structure. */
826 #define elf_i386_hash_table(p) \
827 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
828 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
830 #define elf_i386_compute_jump_table_size(htab) \
831 ((htab)->elf.srelplt->reloc_count * 4)
833 /* Create an entry in an i386 ELF linker hash table. */
835 static struct bfd_hash_entry *
836 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
837 struct bfd_hash_table *table,
840 /* Allocate the structure if it has not already been allocated by a
844 entry = (struct bfd_hash_entry *)
845 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
850 /* Call the allocation method of the superclass. */
851 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
854 struct elf_i386_link_hash_entry *eh;
856 eh = (struct elf_i386_link_hash_entry *) entry;
857 eh->dyn_relocs = NULL;
858 eh->tls_type = GOT_UNKNOWN;
859 eh->tlsdesc_got = (bfd_vma) -1;
865 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
866 for local symbol so that we can handle local STT_GNU_IFUNC symbols
867 as global symbol. We reuse indx and dynstr_index for local symbol
868 hash since they aren't used by global symbols in this backend. */
871 elf_i386_local_htab_hash (const void *ptr)
873 struct elf_link_hash_entry *h
874 = (struct elf_link_hash_entry *) ptr;
875 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
878 /* Compare local hash entries. */
881 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
883 struct elf_link_hash_entry *h1
884 = (struct elf_link_hash_entry *) ptr1;
885 struct elf_link_hash_entry *h2
886 = (struct elf_link_hash_entry *) ptr2;
888 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
891 /* Find and/or create a hash entry for local symbol. */
893 static struct elf_link_hash_entry *
894 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
895 bfd *abfd, const Elf_Internal_Rela *rel,
898 struct elf_i386_link_hash_entry e, *ret;
899 asection *sec = abfd->sections;
900 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
901 ELF32_R_SYM (rel->r_info));
904 e.elf.indx = sec->id;
905 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
906 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
907 create ? INSERT : NO_INSERT);
914 ret = (struct elf_i386_link_hash_entry *) *slot;
918 ret = (struct elf_i386_link_hash_entry *)
919 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
920 sizeof (struct elf_i386_link_hash_entry));
923 memset (ret, 0, sizeof (*ret));
924 ret->elf.indx = sec->id;
925 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
926 ret->elf.dynindx = -1;
932 /* Destroy an i386 ELF linker hash table. */
935 elf_i386_link_hash_table_free (bfd *obfd)
937 struct elf_i386_link_hash_table *htab
938 = (struct elf_i386_link_hash_table *) obfd->link.hash;
940 if (htab->loc_hash_table)
941 htab_delete (htab->loc_hash_table);
942 if (htab->loc_hash_memory)
943 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
944 _bfd_elf_link_hash_table_free (obfd);
947 /* Create an i386 ELF linker hash table. */
949 static struct bfd_link_hash_table *
950 elf_i386_link_hash_table_create (bfd *abfd)
952 struct elf_i386_link_hash_table *ret;
953 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
955 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
959 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
960 elf_i386_link_hash_newfunc,
961 sizeof (struct elf_i386_link_hash_entry),
968 ret->loc_hash_table = htab_try_create (1024,
969 elf_i386_local_htab_hash,
970 elf_i386_local_htab_eq,
972 ret->loc_hash_memory = objalloc_create ();
973 if (!ret->loc_hash_table || !ret->loc_hash_memory)
975 elf_i386_link_hash_table_free (abfd);
978 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
980 return &ret->elf.root;
983 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
984 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
988 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
990 struct elf_i386_link_hash_table *htab;
992 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
995 htab = elf_i386_hash_table (info);
999 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1001 htab->srelbss = bfd_get_linker_section (dynobj, ".rel.bss");
1004 || (!info->shared && !htab->srelbss))
1007 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1008 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1012 if (!info->no_ld_generated_unwind_info
1013 && htab->plt_eh_frame == NULL
1014 && htab->elf.splt != NULL)
1016 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1017 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1018 | SEC_LINKER_CREATED);
1020 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1021 if (htab->plt_eh_frame == NULL
1022 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1029 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1032 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1033 struct elf_link_hash_entry *dir,
1034 struct elf_link_hash_entry *ind)
1036 struct elf_i386_link_hash_entry *edir, *eind;
1038 edir = (struct elf_i386_link_hash_entry *) dir;
1039 eind = (struct elf_i386_link_hash_entry *) ind;
1041 if (eind->dyn_relocs != NULL)
1043 if (edir->dyn_relocs != NULL)
1045 struct elf_dyn_relocs **pp;
1046 struct elf_dyn_relocs *p;
1048 /* Add reloc counts against the indirect sym to the direct sym
1049 list. Merge any entries against the same section. */
1050 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1052 struct elf_dyn_relocs *q;
1054 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1055 if (q->sec == p->sec)
1057 q->pc_count += p->pc_count;
1058 q->count += p->count;
1065 *pp = edir->dyn_relocs;
1068 edir->dyn_relocs = eind->dyn_relocs;
1069 eind->dyn_relocs = NULL;
1072 if (ind->root.type == bfd_link_hash_indirect
1073 && dir->got.refcount <= 0)
1075 edir->tls_type = eind->tls_type;
1076 eind->tls_type = GOT_UNKNOWN;
1079 if (ELIMINATE_COPY_RELOCS
1080 && ind->root.type != bfd_link_hash_indirect
1081 && dir->dynamic_adjusted)
1083 /* If called to transfer flags for a weakdef during processing
1084 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1085 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1086 dir->ref_dynamic |= ind->ref_dynamic;
1087 dir->ref_regular |= ind->ref_regular;
1088 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1089 dir->needs_plt |= ind->needs_plt;
1090 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1093 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1096 /* Return TRUE if the TLS access code sequence support transition
1100 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1102 Elf_Internal_Shdr *symtab_hdr,
1103 struct elf_link_hash_entry **sym_hashes,
1104 unsigned int r_type,
1105 const Elf_Internal_Rela *rel,
1106 const Elf_Internal_Rela *relend)
1108 unsigned int val, type;
1109 unsigned long r_symndx;
1110 struct elf_link_hash_entry *h;
1113 /* Get the section contents. */
1114 if (contents == NULL)
1116 if (elf_section_data (sec)->this_hdr.contents != NULL)
1117 contents = elf_section_data (sec)->this_hdr.contents;
1120 /* FIXME: How to better handle error condition? */
1121 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1124 /* Cache the section contents for elf_link_input_bfd. */
1125 elf_section_data (sec)->this_hdr.contents = contents;
1129 offset = rel->r_offset;
1134 if (offset < 2 || (rel + 1) >= relend)
1137 type = bfd_get_8 (abfd, contents + offset - 2);
1138 if (r_type == R_386_TLS_GD)
1140 /* Check transition from GD access model. Only
1141 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1142 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1143 can transit to different access model. */
1144 if ((offset + 10) > sec->size ||
1145 (type != 0x8d && type != 0x04))
1148 val = bfd_get_8 (abfd, contents + offset - 1);
1151 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1155 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1158 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1163 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1164 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1167 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1173 /* Check transition from LD access model. Only
1174 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1175 can transit to different access model. */
1176 if (type != 0x8d || (offset + 9) > sec->size)
1179 val = bfd_get_8 (abfd, contents + offset - 1);
1180 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1184 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1187 r_symndx = ELF32_R_SYM (rel[1].r_info);
1188 if (r_symndx < symtab_hdr->sh_info)
1191 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1192 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1193 may be versioned. */
1195 && h->root.root.string != NULL
1196 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1197 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1198 && (strncmp (h->root.root.string, "___tls_get_addr",
1202 /* Check transition from IE access model:
1203 movl foo@indntpoff(%rip), %eax
1204 movl foo@indntpoff(%rip), %reg
1205 addl foo@indntpoff(%rip), %reg
1208 if (offset < 1 || (offset + 4) > sec->size)
1211 /* Check "movl foo@tpoff(%rip), %eax" first. */
1212 val = bfd_get_8 (abfd, contents + offset - 1);
1219 /* Check movl|addl foo@tpoff(%rip), %reg. */
1220 type = bfd_get_8 (abfd, contents + offset - 2);
1221 return ((type == 0x8b || type == 0x03)
1222 && (val & 0xc7) == 0x05);
1224 case R_386_TLS_GOTIE:
1225 case R_386_TLS_IE_32:
1226 /* Check transition from {IE_32,GOTIE} access model:
1227 subl foo@{tpoff,gontoff}(%reg1), %reg2
1228 movl foo@{tpoff,gontoff}(%reg1), %reg2
1229 addl foo@{tpoff,gontoff}(%reg1), %reg2
1232 if (offset < 2 || (offset + 4) > sec->size)
1235 val = bfd_get_8 (abfd, contents + offset - 1);
1236 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1239 type = bfd_get_8 (abfd, contents + offset - 2);
1240 return type == 0x8b || type == 0x2b || type == 0x03;
1242 case R_386_TLS_GOTDESC:
1243 /* Check transition from GDesc access model:
1244 leal x@tlsdesc(%ebx), %eax
1246 Make sure it's a leal adding ebx to a 32-bit offset
1247 into any register, although it's probably almost always
1250 if (offset < 2 || (offset + 4) > sec->size)
1253 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1256 val = bfd_get_8 (abfd, contents + offset - 1);
1257 return (val & 0xc7) == 0x83;
1259 case R_386_TLS_DESC_CALL:
1260 /* Check transition from GDesc access model:
1261 call *x@tlsdesc(%rax)
1263 if (offset + 2 <= sec->size)
1265 /* Make sure that it's a call *x@tlsdesc(%rax). */
1266 static const unsigned char call[] = { 0xff, 0x10 };
1267 return memcmp (contents + offset, call, 2) == 0;
1277 /* Return TRUE if the TLS access transition is OK or no transition
1278 will be performed. Update R_TYPE if there is a transition. */
1281 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1282 asection *sec, bfd_byte *contents,
1283 Elf_Internal_Shdr *symtab_hdr,
1284 struct elf_link_hash_entry **sym_hashes,
1285 unsigned int *r_type, int tls_type,
1286 const Elf_Internal_Rela *rel,
1287 const Elf_Internal_Rela *relend,
1288 struct elf_link_hash_entry *h,
1289 unsigned long r_symndx)
1291 unsigned int from_type = *r_type;
1292 unsigned int to_type = from_type;
1293 bfd_boolean check = TRUE;
1295 /* Skip TLS transition for functions. */
1297 && (h->type == STT_FUNC
1298 || h->type == STT_GNU_IFUNC))
1304 case R_386_TLS_GOTDESC:
1305 case R_386_TLS_DESC_CALL:
1306 case R_386_TLS_IE_32:
1308 case R_386_TLS_GOTIE:
1309 if (info->executable)
1312 to_type = R_386_TLS_LE_32;
1313 else if (from_type != R_386_TLS_IE
1314 && from_type != R_386_TLS_GOTIE)
1315 to_type = R_386_TLS_IE_32;
1318 /* When we are called from elf_i386_relocate_section, CONTENTS
1319 isn't NULL and there may be additional transitions based on
1321 if (contents != NULL)
1323 unsigned int new_to_type = to_type;
1325 if (info->executable
1328 && (tls_type & GOT_TLS_IE))
1329 new_to_type = R_386_TLS_LE_32;
1331 if (to_type == R_386_TLS_GD
1332 || to_type == R_386_TLS_GOTDESC
1333 || to_type == R_386_TLS_DESC_CALL)
1335 if (tls_type == GOT_TLS_IE_POS)
1336 new_to_type = R_386_TLS_GOTIE;
1337 else if (tls_type & GOT_TLS_IE)
1338 new_to_type = R_386_TLS_IE_32;
1341 /* We checked the transition before when we were called from
1342 elf_i386_check_relocs. We only want to check the new
1343 transition which hasn't been checked before. */
1344 check = new_to_type != to_type && from_type == to_type;
1345 to_type = new_to_type;
1351 if (info->executable)
1352 to_type = R_386_TLS_LE_32;
1359 /* Return TRUE if there is no transition. */
1360 if (from_type == to_type)
1363 /* Check if the transition can be performed. */
1365 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1366 symtab_hdr, sym_hashes,
1367 from_type, rel, relend))
1369 reloc_howto_type *from, *to;
1372 from = elf_i386_rtype_to_howto (abfd, from_type);
1373 to = elf_i386_rtype_to_howto (abfd, to_type);
1376 name = h->root.root.string;
1379 struct elf_i386_link_hash_table *htab;
1381 htab = elf_i386_hash_table (info);
1386 Elf_Internal_Sym *isym;
1388 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1390 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1394 (*_bfd_error_handler)
1395 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1396 "in section `%A' failed"),
1397 abfd, sec, from->name, to->name, name,
1398 (unsigned long) rel->r_offset);
1399 bfd_set_error (bfd_error_bad_value);
1407 /* Look through the relocs for a section during the first phase, and
1408 calculate needed space in the global offset table, procedure linkage
1409 table, and dynamic reloc sections. */
1412 elf_i386_check_relocs (bfd *abfd,
1413 struct bfd_link_info *info,
1415 const Elf_Internal_Rela *relocs)
1417 struct elf_i386_link_hash_table *htab;
1418 Elf_Internal_Shdr *symtab_hdr;
1419 struct elf_link_hash_entry **sym_hashes;
1420 const Elf_Internal_Rela *rel;
1421 const Elf_Internal_Rela *rel_end;
1424 if (info->relocatable)
1427 BFD_ASSERT (is_i386_elf (abfd));
1429 htab = elf_i386_hash_table (info);
1433 symtab_hdr = &elf_symtab_hdr (abfd);
1434 sym_hashes = elf_sym_hashes (abfd);
1438 rel_end = relocs + sec->reloc_count;
1439 for (rel = relocs; rel < rel_end; rel++)
1441 unsigned int r_type;
1442 unsigned long r_symndx;
1443 struct elf_link_hash_entry *h;
1444 Elf_Internal_Sym *isym;
1446 bfd_boolean size_reloc;
1448 r_symndx = ELF32_R_SYM (rel->r_info);
1449 r_type = ELF32_R_TYPE (rel->r_info);
1451 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1453 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1459 if (r_symndx < symtab_hdr->sh_info)
1461 /* A local symbol. */
1462 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1467 /* Check relocation against local STT_GNU_IFUNC symbol. */
1468 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1470 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1474 /* Fake a STT_GNU_IFUNC symbol. */
1475 h->type = STT_GNU_IFUNC;
1478 h->forced_local = 1;
1479 h->root.type = bfd_link_hash_defined;
1487 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1488 while (h->root.type == bfd_link_hash_indirect
1489 || h->root.type == bfd_link_hash_warning)
1490 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1495 /* Create the ifunc sections for static executables. If we
1496 never see an indirect function symbol nor we are building
1497 a static executable, those sections will be empty and
1498 won't appear in output. */
1509 if (htab->elf.dynobj == NULL)
1510 htab->elf.dynobj = abfd;
1511 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1516 /* It is referenced by a non-shared object. */
1518 h->root.non_ir_ref = 1;
1521 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1522 symtab_hdr, sym_hashes,
1523 &r_type, GOT_UNKNOWN,
1524 rel, rel_end, h, r_symndx))
1530 htab->tls_ldm_got.refcount += 1;
1534 /* This symbol requires a procedure linkage table entry. We
1535 actually build the entry in adjust_dynamic_symbol,
1536 because this might be a case of linking PIC code which is
1537 never referenced by a dynamic object, in which case we
1538 don't need to generate a procedure linkage table entry
1541 /* If this is a local symbol, we resolve it directly without
1542 creating a procedure linkage table entry. */
1547 h->plt.refcount += 1;
1554 case R_386_TLS_IE_32:
1556 case R_386_TLS_GOTIE:
1557 if (!info->executable)
1558 info->flags |= DF_STATIC_TLS;
1563 case R_386_TLS_GOTDESC:
1564 case R_386_TLS_DESC_CALL:
1565 /* This symbol requires a global offset table entry. */
1567 int tls_type, old_tls_type;
1572 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1573 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1574 case R_386_TLS_GOTDESC:
1575 case R_386_TLS_DESC_CALL:
1576 tls_type = GOT_TLS_GDESC; break;
1577 case R_386_TLS_IE_32:
1578 if (ELF32_R_TYPE (rel->r_info) == r_type)
1579 tls_type = GOT_TLS_IE_NEG;
1581 /* If this is a GD->IE transition, we may use either of
1582 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1583 tls_type = GOT_TLS_IE;
1586 case R_386_TLS_GOTIE:
1587 tls_type = GOT_TLS_IE_POS; break;
1592 h->got.refcount += 1;
1593 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1597 bfd_signed_vma *local_got_refcounts;
1599 /* This is a global offset table entry for a local symbol. */
1600 local_got_refcounts = elf_local_got_refcounts (abfd);
1601 if (local_got_refcounts == NULL)
1605 size = symtab_hdr->sh_info;
1606 size *= (sizeof (bfd_signed_vma)
1607 + sizeof (bfd_vma) + sizeof(char));
1608 local_got_refcounts = (bfd_signed_vma *)
1609 bfd_zalloc (abfd, size);
1610 if (local_got_refcounts == NULL)
1612 elf_local_got_refcounts (abfd) = local_got_refcounts;
1613 elf_i386_local_tlsdesc_gotent (abfd)
1614 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1615 elf_i386_local_got_tls_type (abfd)
1616 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1618 local_got_refcounts[r_symndx] += 1;
1619 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1622 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1623 tls_type |= old_tls_type;
1624 /* If a TLS symbol is accessed using IE at least once,
1625 there is no point to use dynamic model for it. */
1626 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1627 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1628 || (tls_type & GOT_TLS_IE) == 0))
1630 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1631 tls_type = old_tls_type;
1632 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1633 && GOT_TLS_GD_ANY_P (tls_type))
1634 tls_type |= old_tls_type;
1638 name = h->root.root.string;
1640 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1642 (*_bfd_error_handler)
1643 (_("%B: `%s' accessed both as normal and "
1644 "thread local symbol"),
1646 bfd_set_error (bfd_error_bad_value);
1651 if (old_tls_type != tls_type)
1654 elf_i386_hash_entry (h)->tls_type = tls_type;
1656 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1664 if (htab->elf.sgot == NULL)
1666 if (htab->elf.dynobj == NULL)
1667 htab->elf.dynobj = abfd;
1668 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1671 if (r_type != R_386_TLS_IE)
1675 case R_386_TLS_LE_32:
1677 if (info->executable)
1679 info->flags |= DF_STATIC_TLS;
1684 if (h != NULL && info->executable)
1686 /* If this reloc is in a read-only section, we might
1687 need a copy reloc. We can't check reliably at this
1688 stage whether the section is read-only, as input
1689 sections have not yet been mapped to output sections.
1690 Tentatively set the flag for now, and correct in
1691 adjust_dynamic_symbol. */
1694 /* We may need a .plt entry if the function this reloc
1695 refers to is in a shared lib. */
1696 h->plt.refcount += 1;
1697 if (r_type != R_386_PC32)
1698 h->pointer_equality_needed = 1;
1703 /* If we are creating a shared library, and this is a reloc
1704 against a global symbol, or a non PC relative reloc
1705 against a local symbol, then we need to copy the reloc
1706 into the shared library. However, if we are linking with
1707 -Bsymbolic, we do not need to copy a reloc against a
1708 global symbol which is defined in an object we are
1709 including in the link (i.e., DEF_REGULAR is set). At
1710 this point we have not seen all the input files, so it is
1711 possible that DEF_REGULAR is not set now but will be set
1712 later (it is never cleared). In case of a weak definition,
1713 DEF_REGULAR may be cleared later by a strong definition in
1714 a shared library. We account for that possibility below by
1715 storing information in the relocs_copied field of the hash
1716 table entry. A similar situation occurs when creating
1717 shared libraries and symbol visibility changes render the
1720 If on the other hand, we are creating an executable, we
1721 may need to keep relocations for symbols satisfied by a
1722 dynamic library if we manage to avoid copy relocs for the
1725 && (sec->flags & SEC_ALLOC) != 0
1726 && (r_type != R_386_PC32
1728 && (! SYMBOLIC_BIND (info, h)
1729 || h->root.type == bfd_link_hash_defweak
1730 || !h->def_regular))))
1731 || (ELIMINATE_COPY_RELOCS
1733 && (sec->flags & SEC_ALLOC) != 0
1735 && (h->root.type == bfd_link_hash_defweak
1736 || !h->def_regular)))
1738 struct elf_dyn_relocs *p;
1739 struct elf_dyn_relocs **head;
1741 /* We must copy these reloc types into the output file.
1742 Create a reloc section in dynobj and make room for
1746 if (htab->elf.dynobj == NULL)
1747 htab->elf.dynobj = abfd;
1749 sreloc = _bfd_elf_make_dynamic_reloc_section
1750 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1756 /* If this is a global symbol, we count the number of
1757 relocations we need for this symbol. */
1760 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1764 /* Track dynamic relocs needed for local syms too.
1765 We really need local syms available to do this
1770 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1775 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1779 vpp = &elf_section_data (s)->local_dynrel;
1780 head = (struct elf_dyn_relocs **)vpp;
1784 if (p == NULL || p->sec != sec)
1786 bfd_size_type amt = sizeof *p;
1787 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1799 /* Count size relocation as PC-relative relocation. */
1800 if (r_type == R_386_PC32 || size_reloc)
1805 /* This relocation describes the C++ object vtable hierarchy.
1806 Reconstruct it for later use during GC. */
1807 case R_386_GNU_VTINHERIT:
1808 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1812 /* This relocation describes which C++ vtable entries are actually
1813 used. Record for later use during GC. */
1814 case R_386_GNU_VTENTRY:
1815 BFD_ASSERT (h != NULL);
1817 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1829 /* Return the section that should be marked against GC for a given
1833 elf_i386_gc_mark_hook (asection *sec,
1834 struct bfd_link_info *info,
1835 Elf_Internal_Rela *rel,
1836 struct elf_link_hash_entry *h,
1837 Elf_Internal_Sym *sym)
1840 switch (ELF32_R_TYPE (rel->r_info))
1842 case R_386_GNU_VTINHERIT:
1843 case R_386_GNU_VTENTRY:
1847 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1850 /* Update the got entry reference counts for the section being removed. */
1853 elf_i386_gc_sweep_hook (bfd *abfd,
1854 struct bfd_link_info *info,
1856 const Elf_Internal_Rela *relocs)
1858 struct elf_i386_link_hash_table *htab;
1859 Elf_Internal_Shdr *symtab_hdr;
1860 struct elf_link_hash_entry **sym_hashes;
1861 bfd_signed_vma *local_got_refcounts;
1862 const Elf_Internal_Rela *rel, *relend;
1864 if (info->relocatable)
1867 htab = elf_i386_hash_table (info);
1871 elf_section_data (sec)->local_dynrel = NULL;
1873 symtab_hdr = &elf_symtab_hdr (abfd);
1874 sym_hashes = elf_sym_hashes (abfd);
1875 local_got_refcounts = elf_local_got_refcounts (abfd);
1877 relend = relocs + sec->reloc_count;
1878 for (rel = relocs; rel < relend; rel++)
1880 unsigned long r_symndx;
1881 unsigned int r_type;
1882 struct elf_link_hash_entry *h = NULL;
1884 r_symndx = ELF32_R_SYM (rel->r_info);
1885 if (r_symndx >= symtab_hdr->sh_info)
1887 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1888 while (h->root.type == bfd_link_hash_indirect
1889 || h->root.type == bfd_link_hash_warning)
1890 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1894 /* A local symbol. */
1895 Elf_Internal_Sym *isym;
1897 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1900 /* Check relocation against local STT_GNU_IFUNC symbol. */
1902 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1904 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
1912 struct elf_i386_link_hash_entry *eh;
1913 struct elf_dyn_relocs **pp;
1914 struct elf_dyn_relocs *p;
1916 eh = (struct elf_i386_link_hash_entry *) h;
1917 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1920 /* Everything must go for SEC. */
1926 r_type = ELF32_R_TYPE (rel->r_info);
1927 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1928 symtab_hdr, sym_hashes,
1929 &r_type, GOT_UNKNOWN,
1930 rel, relend, h, r_symndx))
1936 if (htab->tls_ldm_got.refcount > 0)
1937 htab->tls_ldm_got.refcount -= 1;
1941 case R_386_TLS_GOTDESC:
1942 case R_386_TLS_DESC_CALL:
1943 case R_386_TLS_IE_32:
1945 case R_386_TLS_GOTIE:
1949 if (h->got.refcount > 0)
1950 h->got.refcount -= 1;
1951 if (h->type == STT_GNU_IFUNC)
1953 if (h->plt.refcount > 0)
1954 h->plt.refcount -= 1;
1957 else if (local_got_refcounts != NULL)
1959 if (local_got_refcounts[r_symndx] > 0)
1960 local_got_refcounts[r_symndx] -= 1;
1968 && (h == NULL || h->type != STT_GNU_IFUNC))
1975 if (h->plt.refcount > 0)
1976 h->plt.refcount -= 1;
1981 if (h != NULL && h->type == STT_GNU_IFUNC)
1983 if (h->got.refcount > 0)
1984 h->got.refcount -= 1;
1985 if (h->plt.refcount > 0)
1986 h->plt.refcount -= 1;
1998 /* Adjust a symbol defined by a dynamic object and referenced by a
1999 regular object. The current definition is in some section of the
2000 dynamic object, but we're not including those sections. We have to
2001 change the definition to something the rest of the link can
2005 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2006 struct elf_link_hash_entry *h)
2008 struct elf_i386_link_hash_table *htab;
2010 struct elf_i386_link_hash_entry *eh;
2011 struct elf_dyn_relocs *p;
2013 /* STT_GNU_IFUNC symbol must go through PLT. */
2014 if (h->type == STT_GNU_IFUNC)
2016 /* All local STT_GNU_IFUNC references must be treate as local
2017 calls via local PLT. */
2019 && SYMBOL_CALLS_LOCAL (info, h))
2021 bfd_size_type pc_count = 0, count = 0;
2022 struct elf_dyn_relocs **pp;
2024 eh = (struct elf_i386_link_hash_entry *) h;
2025 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2027 pc_count += p->pc_count;
2028 p->count -= p->pc_count;
2037 if (pc_count || count)
2041 if (h->plt.refcount <= 0)
2042 h->plt.refcount = 1;
2044 h->plt.refcount += 1;
2048 if (h->plt.refcount <= 0)
2050 h->plt.offset = (bfd_vma) -1;
2056 /* If this is a function, put it in the procedure linkage table. We
2057 will fill in the contents of the procedure linkage table later,
2058 when we know the address of the .got section. */
2059 if (h->type == STT_FUNC
2062 if (h->plt.refcount <= 0
2063 || SYMBOL_CALLS_LOCAL (info, h)
2064 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2065 && h->root.type == bfd_link_hash_undefweak))
2067 /* This case can occur if we saw a PLT32 reloc in an input
2068 file, but the symbol was never referred to by a dynamic
2069 object, or if all references were garbage collected. In
2070 such a case, we don't actually need to build a procedure
2071 linkage table, and we can just do a PC32 reloc instead. */
2072 h->plt.offset = (bfd_vma) -1;
2079 /* It's possible that we incorrectly decided a .plt reloc was
2080 needed for an R_386_PC32 reloc to a non-function sym in
2081 check_relocs. We can't decide accurately between function and
2082 non-function syms in check-relocs; Objects loaded later in
2083 the link may change h->type. So fix it now. */
2084 h->plt.offset = (bfd_vma) -1;
2086 /* If this is a weak symbol, and there is a real definition, the
2087 processor independent code will have arranged for us to see the
2088 real definition first, and we can just use the same value. */
2089 if (h->u.weakdef != NULL)
2091 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2092 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2093 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2094 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2095 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2096 h->non_got_ref = h->u.weakdef->non_got_ref;
2100 /* This is a reference to a symbol defined by a dynamic object which
2101 is not a function. */
2103 /* If we are creating a shared library, we must presume that the
2104 only references to the symbol are via the global offset table.
2105 For such cases we need not do anything here; the relocations will
2106 be handled correctly by relocate_section. */
2110 /* If there are no references to this symbol that do not use the
2111 GOT, we don't need to generate a copy reloc. */
2112 if (!h->non_got_ref)
2115 /* If -z nocopyreloc was given, we won't generate them either. */
2116 if (info->nocopyreloc)
2122 htab = elf_i386_hash_table (info);
2126 /* If there aren't any dynamic relocs in read-only sections, then
2127 we can keep the dynamic relocs and avoid the copy reloc. This
2128 doesn't work on VxWorks, where we can not have dynamic relocations
2129 (other than copy and jump slot relocations) in an executable. */
2130 if (ELIMINATE_COPY_RELOCS
2131 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2133 eh = (struct elf_i386_link_hash_entry *) h;
2134 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2136 s = p->sec->output_section;
2137 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2148 /* We must allocate the symbol in our .dynbss section, which will
2149 become part of the .bss section of the executable. There will be
2150 an entry for this symbol in the .dynsym section. The dynamic
2151 object will contain position independent code, so all references
2152 from the dynamic object to this symbol will go through the global
2153 offset table. The dynamic linker will use the .dynsym entry to
2154 determine the address it must put in the global offset table, so
2155 both the dynamic object and the regular object will refer to the
2156 same memory location for the variable. */
2158 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2159 copy the initial value out of the dynamic object and into the
2160 runtime process image. */
2161 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2163 htab->srelbss->size += sizeof (Elf32_External_Rel);
2169 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2172 /* Allocate space in .plt, .got and associated reloc sections for
2176 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2178 struct bfd_link_info *info;
2179 struct elf_i386_link_hash_table *htab;
2180 struct elf_i386_link_hash_entry *eh;
2181 struct elf_dyn_relocs *p;
2182 unsigned plt_entry_size;
2184 if (h->root.type == bfd_link_hash_indirect)
2187 eh = (struct elf_i386_link_hash_entry *) h;
2189 info = (struct bfd_link_info *) inf;
2190 htab = elf_i386_hash_table (info);
2194 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2196 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2197 here if it is defined and referenced in a non-shared object. */
2198 if (h->type == STT_GNU_IFUNC
2200 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2203 else if (htab->elf.dynamic_sections_created
2204 && h->plt.refcount > 0)
2206 /* Make sure this symbol is output as a dynamic symbol.
2207 Undefined weak syms won't yet be marked as dynamic. */
2208 if (h->dynindx == -1
2209 && !h->forced_local)
2211 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2216 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2218 asection *s = htab->elf.splt;
2220 /* If this is the first .plt entry, make room for the special
2223 s->size = plt_entry_size;
2225 h->plt.offset = s->size;
2227 /* If this symbol is not defined in a regular file, and we are
2228 not generating a shared library, then set the symbol to this
2229 location in the .plt. This is required to make function
2230 pointers compare as equal between the normal executable and
2231 the shared library. */
2235 h->root.u.def.section = s;
2236 h->root.u.def.value = h->plt.offset;
2239 /* Make room for this entry. */
2240 s->size += plt_entry_size;
2242 /* We also need to make an entry in the .got.plt section, which
2243 will be placed in the .got section by the linker script. */
2244 htab->elf.sgotplt->size += 4;
2246 /* We also need to make an entry in the .rel.plt section. */
2247 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2248 htab->elf.srelplt->reloc_count++;
2250 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2253 /* VxWorks has a second set of relocations for each PLT entry
2254 in executables. They go in a separate relocation section,
2255 which is processed by the kernel loader. */
2257 /* There are two relocations for the initial PLT entry: an
2258 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2259 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2261 if (h->plt.offset == plt_entry_size)
2262 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2264 /* There are two extra relocations for each subsequent PLT entry:
2265 an R_386_32 relocation for the GOT entry, and an R_386_32
2266 relocation for the PLT entry. */
2268 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2273 h->plt.offset = (bfd_vma) -1;
2279 h->plt.offset = (bfd_vma) -1;
2283 eh->tlsdesc_got = (bfd_vma) -1;
2285 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2286 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2287 if (h->got.refcount > 0
2290 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2291 h->got.offset = (bfd_vma) -1;
2292 else if (h->got.refcount > 0)
2296 int tls_type = elf_i386_hash_entry(h)->tls_type;
2298 /* Make sure this symbol is output as a dynamic symbol.
2299 Undefined weak syms won't yet be marked as dynamic. */
2300 if (h->dynindx == -1
2301 && !h->forced_local)
2303 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2308 if (GOT_TLS_GDESC_P (tls_type))
2310 eh->tlsdesc_got = htab->elf.sgotplt->size
2311 - elf_i386_compute_jump_table_size (htab);
2312 htab->elf.sgotplt->size += 8;
2313 h->got.offset = (bfd_vma) -2;
2315 if (! GOT_TLS_GDESC_P (tls_type)
2316 || GOT_TLS_GD_P (tls_type))
2318 h->got.offset = s->size;
2320 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2321 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2324 dyn = htab->elf.dynamic_sections_created;
2325 /* R_386_TLS_IE_32 needs one dynamic relocation,
2326 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2327 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2328 need two), R_386_TLS_GD needs one if local symbol and two if
2330 if (tls_type == GOT_TLS_IE_BOTH)
2331 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2332 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2333 || (tls_type & GOT_TLS_IE))
2334 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2335 else if (GOT_TLS_GD_P (tls_type))
2336 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2337 else if (! GOT_TLS_GDESC_P (tls_type)
2338 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2339 || h->root.type != bfd_link_hash_undefweak)
2341 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2342 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2343 if (GOT_TLS_GDESC_P (tls_type))
2344 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2347 h->got.offset = (bfd_vma) -1;
2349 if (eh->dyn_relocs == NULL)
2352 /* In the shared -Bsymbolic case, discard space allocated for
2353 dynamic pc-relative relocs against symbols which turn out to be
2354 defined in regular objects. For the normal shared case, discard
2355 space for pc-relative relocs that have become local due to symbol
2356 visibility changes. */
2360 /* The only reloc that uses pc_count is R_386_PC32, which will
2361 appear on a call or on something like ".long foo - .". We
2362 want calls to protected symbols to resolve directly to the
2363 function rather than going via the plt. If people want
2364 function pointer comparisons to work as expected then they
2365 should avoid writing assembly like ".long foo - .". */
2366 if (SYMBOL_CALLS_LOCAL (info, h))
2368 struct elf_dyn_relocs **pp;
2370 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2372 p->count -= p->pc_count;
2381 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2383 struct elf_dyn_relocs **pp;
2384 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2386 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2393 /* Also discard relocs on undefined weak syms with non-default
2395 if (eh->dyn_relocs != NULL
2396 && h->root.type == bfd_link_hash_undefweak)
2398 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2399 eh->dyn_relocs = NULL;
2401 /* Make sure undefined weak symbols are output as a dynamic
2403 else if (h->dynindx == -1
2404 && !h->forced_local)
2406 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2411 else if (ELIMINATE_COPY_RELOCS)
2413 /* For the non-shared case, discard space for relocs against
2414 symbols which turn out to need copy relocs or are not
2420 || (htab->elf.dynamic_sections_created
2421 && (h->root.type == bfd_link_hash_undefweak
2422 || h->root.type == bfd_link_hash_undefined))))
2424 /* Make sure this symbol is output as a dynamic symbol.
2425 Undefined weak syms won't yet be marked as dynamic. */
2426 if (h->dynindx == -1
2427 && !h->forced_local)
2429 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2433 /* If that succeeded, we know we'll be keeping all the
2435 if (h->dynindx != -1)
2439 eh->dyn_relocs = NULL;
2444 /* Finally, allocate space. */
2445 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2449 sreloc = elf_section_data (p->sec)->sreloc;
2451 BFD_ASSERT (sreloc != NULL);
2452 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2458 /* Allocate space in .plt, .got and associated reloc sections for
2459 local dynamic relocs. */
2462 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2464 struct elf_link_hash_entry *h
2465 = (struct elf_link_hash_entry *) *slot;
2467 if (h->type != STT_GNU_IFUNC
2471 || h->root.type != bfd_link_hash_defined)
2474 return elf_i386_allocate_dynrelocs (h, inf);
2477 /* Find any dynamic relocs that apply to read-only sections. */
2480 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2482 struct elf_i386_link_hash_entry *eh;
2483 struct elf_dyn_relocs *p;
2485 /* Skip local IFUNC symbols. */
2486 if (h->forced_local && h->type == STT_GNU_IFUNC)
2489 eh = (struct elf_i386_link_hash_entry *) h;
2490 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2492 asection *s = p->sec->output_section;
2494 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2496 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2498 info->flags |= DF_TEXTREL;
2500 if (info->warn_shared_textrel && info->shared)
2501 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2502 p->sec->owner, h->root.root.string,
2505 /* Not an error, just cut short the traversal. */
2513 mov foo@GOT(%reg), %reg
2515 lea foo@GOTOFF(%reg), %reg
2516 with the local symbol, foo. */
2519 elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2520 struct bfd_link_info *link_info)
2522 Elf_Internal_Shdr *symtab_hdr;
2523 Elf_Internal_Rela *internal_relocs;
2524 Elf_Internal_Rela *irel, *irelend;
2526 struct elf_i386_link_hash_table *htab;
2527 bfd_boolean changed_contents;
2528 bfd_boolean changed_relocs;
2529 bfd_signed_vma *local_got_refcounts;
2531 /* Don't even try to convert non-ELF outputs. */
2532 if (!is_elf_hash_table (link_info->hash))
2535 /* Nothing to do if there are no codes, no relocations or no output. */
2536 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2537 || sec->reloc_count == 0
2538 || bfd_is_abs_section (sec->output_section))
2541 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2543 /* Load the relocations for this section. */
2544 internal_relocs = (_bfd_elf_link_read_relocs
2545 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2546 link_info->keep_memory));
2547 if (internal_relocs == NULL)
2550 htab = elf_i386_hash_table (link_info);
2551 changed_contents = FALSE;
2552 changed_relocs = FALSE;
2553 local_got_refcounts = elf_local_got_refcounts (abfd);
2555 /* Get the section contents. */
2556 if (elf_section_data (sec)->this_hdr.contents != NULL)
2557 contents = elf_section_data (sec)->this_hdr.contents;
2560 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2564 irelend = internal_relocs + sec->reloc_count;
2565 for (irel = internal_relocs; irel < irelend; irel++)
2567 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2568 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2570 struct elf_link_hash_entry *h;
2572 if (r_type != R_386_GOT32)
2575 /* Get the symbol referred to by the reloc. */
2576 if (r_symndx < symtab_hdr->sh_info)
2578 Elf_Internal_Sym *isym;
2580 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2583 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2584 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2585 && bfd_get_8 (input_bfd,
2586 contents + irel->r_offset - 2) == 0x8b)
2588 bfd_put_8 (output_bfd, 0x8d,
2589 contents + irel->r_offset - 2);
2590 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2591 if (local_got_refcounts != NULL
2592 && local_got_refcounts[r_symndx] > 0)
2593 local_got_refcounts[r_symndx] -= 1;
2594 changed_contents = TRUE;
2595 changed_relocs = TRUE;
2600 indx = r_symndx - symtab_hdr->sh_info;
2601 h = elf_sym_hashes (abfd)[indx];
2602 BFD_ASSERT (h != NULL);
2604 while (h->root.type == bfd_link_hash_indirect
2605 || h->root.type == bfd_link_hash_warning)
2606 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2608 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2609 optimizing _DYNAMIC since ld.so may use its link-time address. */
2611 && h->type != STT_GNU_IFUNC
2612 && h != htab->elf.hdynamic
2613 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2614 && bfd_get_8 (input_bfd,
2615 contents + irel->r_offset - 2) == 0x8b)
2617 bfd_put_8 (output_bfd, 0x8d,
2618 contents + irel->r_offset - 2);
2619 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2620 if (h->got.refcount > 0)
2621 h->got.refcount -= 1;
2622 changed_contents = TRUE;
2623 changed_relocs = TRUE;
2627 if (contents != NULL
2628 && elf_section_data (sec)->this_hdr.contents != contents)
2630 if (!changed_contents && !link_info->keep_memory)
2634 /* Cache the section contents for elf_link_input_bfd. */
2635 elf_section_data (sec)->this_hdr.contents = contents;
2639 if (elf_section_data (sec)->relocs != internal_relocs)
2641 if (!changed_relocs)
2642 free (internal_relocs);
2644 elf_section_data (sec)->relocs = internal_relocs;
2650 if (contents != NULL
2651 && elf_section_data (sec)->this_hdr.contents != contents)
2653 if (internal_relocs != NULL
2654 && elf_section_data (sec)->relocs != internal_relocs)
2655 free (internal_relocs);
2659 /* Set the sizes of the dynamic sections. */
2662 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2664 struct elf_i386_link_hash_table *htab;
2670 htab = elf_i386_hash_table (info);
2673 dynobj = htab->elf.dynobj;
2677 if (htab->elf.dynamic_sections_created)
2679 /* Set the contents of the .interp section to the interpreter. */
2680 if (info->executable)
2682 s = bfd_get_linker_section (dynobj, ".interp");
2685 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2686 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2690 /* Set up .got offsets for local syms, and space for local dynamic
2692 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2694 bfd_signed_vma *local_got;
2695 bfd_signed_vma *end_local_got;
2696 char *local_tls_type;
2697 bfd_vma *local_tlsdesc_gotent;
2698 bfd_size_type locsymcount;
2699 Elf_Internal_Shdr *symtab_hdr;
2702 if (! is_i386_elf (ibfd))
2705 for (s = ibfd->sections; s != NULL; s = s->next)
2707 struct elf_dyn_relocs *p;
2709 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2712 for (p = ((struct elf_dyn_relocs *)
2713 elf_section_data (s)->local_dynrel);
2717 if (!bfd_is_abs_section (p->sec)
2718 && bfd_is_abs_section (p->sec->output_section))
2720 /* Input section has been discarded, either because
2721 it is a copy of a linkonce section or due to
2722 linker script /DISCARD/, so we'll be discarding
2725 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
2726 && strcmp (p->sec->output_section->name,
2729 /* Relocations in vxworks .tls_vars sections are
2730 handled specially by the loader. */
2732 else if (p->count != 0)
2734 srel = elf_section_data (p->sec)->sreloc;
2735 srel->size += p->count * sizeof (Elf32_External_Rel);
2736 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2737 && (info->flags & DF_TEXTREL) == 0)
2739 info->flags |= DF_TEXTREL;
2740 if (info->warn_shared_textrel && info->shared)
2741 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2742 p->sec->owner, p->sec);
2748 local_got = elf_local_got_refcounts (ibfd);
2752 symtab_hdr = &elf_symtab_hdr (ibfd);
2753 locsymcount = symtab_hdr->sh_info;
2754 end_local_got = local_got + locsymcount;
2755 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2756 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2758 srel = htab->elf.srelgot;
2759 for (; local_got < end_local_got;
2760 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2762 *local_tlsdesc_gotent = (bfd_vma) -1;
2765 if (GOT_TLS_GDESC_P (*local_tls_type))
2767 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2768 - elf_i386_compute_jump_table_size (htab);
2769 htab->elf.sgotplt->size += 8;
2770 *local_got = (bfd_vma) -2;
2772 if (! GOT_TLS_GDESC_P (*local_tls_type)
2773 || GOT_TLS_GD_P (*local_tls_type))
2775 *local_got = s->size;
2777 if (GOT_TLS_GD_P (*local_tls_type)
2778 || *local_tls_type == GOT_TLS_IE_BOTH)
2782 || GOT_TLS_GD_ANY_P (*local_tls_type)
2783 || (*local_tls_type & GOT_TLS_IE))
2785 if (*local_tls_type == GOT_TLS_IE_BOTH)
2786 srel->size += 2 * sizeof (Elf32_External_Rel);
2787 else if (GOT_TLS_GD_P (*local_tls_type)
2788 || ! GOT_TLS_GDESC_P (*local_tls_type))
2789 srel->size += sizeof (Elf32_External_Rel);
2790 if (GOT_TLS_GDESC_P (*local_tls_type))
2791 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2795 *local_got = (bfd_vma) -1;
2799 if (htab->tls_ldm_got.refcount > 0)
2801 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2803 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2804 htab->elf.sgot->size += 8;
2805 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2808 htab->tls_ldm_got.offset = -1;
2810 /* Allocate global sym .plt and .got entries, and space for global
2811 sym dynamic relocs. */
2812 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2814 /* Allocate .plt and .got entries, and space for local symbols. */
2815 htab_traverse (htab->loc_hash_table,
2816 elf_i386_allocate_local_dynrelocs,
2819 /* For every jump slot reserved in the sgotplt, reloc_count is
2820 incremented. However, when we reserve space for TLS descriptors,
2821 it's not incremented, so in order to compute the space reserved
2822 for them, it suffices to multiply the reloc count by the jump
2825 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2826 so that R_386_IRELATIVE entries come last. */
2827 if (htab->elf.srelplt)
2829 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2830 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2831 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2833 else if (htab->elf.irelplt)
2834 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2837 if (htab->elf.sgotplt)
2839 /* Don't allocate .got.plt section if there are no GOT nor PLT
2840 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2841 if ((htab->elf.hgot == NULL
2842 || !htab->elf.hgot->ref_regular_nonweak)
2843 && (htab->elf.sgotplt->size
2844 == get_elf_backend_data (output_bfd)->got_header_size)
2845 && (htab->elf.splt == NULL
2846 || htab->elf.splt->size == 0)
2847 && (htab->elf.sgot == NULL
2848 || htab->elf.sgot->size == 0)
2849 && (htab->elf.iplt == NULL
2850 || htab->elf.iplt->size == 0)
2851 && (htab->elf.igotplt == NULL
2852 || htab->elf.igotplt->size == 0))
2853 htab->elf.sgotplt->size = 0;
2857 if (htab->plt_eh_frame != NULL
2858 && htab->elf.splt != NULL
2859 && htab->elf.splt->size != 0
2860 && !bfd_is_abs_section (htab->elf.splt->output_section)
2861 && _bfd_elf_eh_frame_present (info))
2862 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
2864 /* We now have determined the sizes of the various dynamic sections.
2865 Allocate memory for them. */
2867 for (s = dynobj->sections; s != NULL; s = s->next)
2869 bfd_boolean strip_section = TRUE;
2871 if ((s->flags & SEC_LINKER_CREATED) == 0)
2874 if (s == htab->elf.splt
2875 || s == htab->elf.sgot)
2877 /* Strip this section if we don't need it; see the
2879 /* We'd like to strip these sections if they aren't needed, but if
2880 we've exported dynamic symbols from them we must leave them.
2881 It's too late to tell BFD to get rid of the symbols. */
2883 if (htab->elf.hplt != NULL)
2884 strip_section = FALSE;
2886 else if (s == htab->elf.sgotplt
2887 || s == htab->elf.iplt
2888 || s == htab->elf.igotplt
2889 || s == htab->plt_eh_frame
2890 || s == htab->sdynbss)
2892 /* Strip these too. */
2894 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2897 && s != htab->elf.srelplt
2898 && s != htab->srelplt2)
2901 /* We use the reloc_count field as a counter if we need
2902 to copy relocs into the output file. */
2907 /* It's not one of our sections, so don't allocate space. */
2913 /* If we don't need this section, strip it from the
2914 output file. This is mostly to handle .rel.bss and
2915 .rel.plt. We must create both sections in
2916 create_dynamic_sections, because they must be created
2917 before the linker maps input sections to output
2918 sections. The linker does that before
2919 adjust_dynamic_symbol is called, and it is that
2920 function which decides whether anything needs to go
2921 into these sections. */
2923 s->flags |= SEC_EXCLUDE;
2927 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2930 /* Allocate memory for the section contents. We use bfd_zalloc
2931 here in case unused entries are not reclaimed before the
2932 section's contents are written out. This should not happen,
2933 but this way if it does, we get a R_386_NONE reloc instead
2935 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2936 if (s->contents == NULL)
2940 if (htab->plt_eh_frame != NULL
2941 && htab->plt_eh_frame->contents != NULL)
2943 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
2944 sizeof (elf_i386_eh_frame_plt));
2945 bfd_put_32 (dynobj, htab->elf.splt->size,
2946 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2949 if (htab->elf.dynamic_sections_created)
2951 /* Add some entries to the .dynamic section. We fill in the
2952 values later, in elf_i386_finish_dynamic_sections, but we
2953 must add the entries now so that we get the correct size for
2954 the .dynamic section. The DT_DEBUG entry is filled in by the
2955 dynamic linker and used by the debugger. */
2956 #define add_dynamic_entry(TAG, VAL) \
2957 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2959 if (info->executable)
2961 if (!add_dynamic_entry (DT_DEBUG, 0))
2965 if (htab->elf.splt->size != 0)
2967 if (!add_dynamic_entry (DT_PLTGOT, 0)
2968 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2969 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2970 || !add_dynamic_entry (DT_JMPREL, 0))
2976 if (!add_dynamic_entry (DT_REL, 0)
2977 || !add_dynamic_entry (DT_RELSZ, 0)
2978 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2981 /* If any dynamic relocs apply to a read-only section,
2982 then we need a DT_TEXTREL entry. */
2983 if ((info->flags & DF_TEXTREL) == 0)
2984 elf_link_hash_traverse (&htab->elf,
2985 elf_i386_readonly_dynrelocs, info);
2987 if ((info->flags & DF_TEXTREL) != 0)
2989 if (!add_dynamic_entry (DT_TEXTREL, 0))
2993 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
2994 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2997 #undef add_dynamic_entry
3003 elf_i386_always_size_sections (bfd *output_bfd,
3004 struct bfd_link_info *info)
3006 asection *tls_sec = elf_hash_table (info)->tls_sec;
3010 struct elf_link_hash_entry *tlsbase;
3012 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3013 "_TLS_MODULE_BASE_",
3014 FALSE, FALSE, FALSE);
3016 if (tlsbase && tlsbase->type == STT_TLS)
3018 struct elf_i386_link_hash_table *htab;
3019 struct bfd_link_hash_entry *bh = NULL;
3020 const struct elf_backend_data *bed
3021 = get_elf_backend_data (output_bfd);
3023 htab = elf_i386_hash_table (info);
3027 if (!(_bfd_generic_link_add_one_symbol
3028 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3029 tls_sec, 0, NULL, FALSE,
3030 bed->collect, &bh)))
3033 htab->tls_module_base = bh;
3035 tlsbase = (struct elf_link_hash_entry *)bh;
3036 tlsbase->def_regular = 1;
3037 tlsbase->other = STV_HIDDEN;
3038 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3045 /* Set the correct type for an x86 ELF section. We do this by the
3046 section name, which is a hack, but ought to work. */
3049 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3050 Elf_Internal_Shdr *hdr,
3055 name = bfd_get_section_name (abfd, sec);
3057 /* This is an ugly, but unfortunately necessary hack that is
3058 needed when producing EFI binaries on x86. It tells
3059 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3060 containing ELF relocation info. We need this hack in order to
3061 be able to generate ELF binaries that can be translated into
3062 EFI applications (which are essentially COFF objects). Those
3063 files contain a COFF ".reloc" section inside an ELFNN object,
3064 which would normally cause BFD to segfault because it would
3065 attempt to interpret this section as containing relocation
3066 entries for section "oc". With this hack enabled, ".reloc"
3067 will be treated as a normal data section, which will avoid the
3068 segfault. However, you won't be able to create an ELFNN binary
3069 with a section named "oc" that needs relocations, but that's
3070 the kind of ugly side-effects you get when detecting section
3071 types based on their names... In practice, this limitation is
3072 unlikely to bite. */
3073 if (strcmp (name, ".reloc") == 0)
3074 hdr->sh_type = SHT_PROGBITS;
3079 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3080 executables. Rather than setting it to the beginning of the TLS
3081 section, we have to set it to the end. This function may be called
3082 multiple times, it is idempotent. */
3085 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3087 struct elf_i386_link_hash_table *htab;
3088 struct bfd_link_hash_entry *base;
3090 if (!info->executable)
3093 htab = elf_i386_hash_table (info);
3097 base = htab->tls_module_base;
3101 base->u.def.value = htab->elf.tls_size;
3104 /* Return the base VMA address which should be subtracted from real addresses
3105 when resolving @dtpoff relocation.
3106 This is PT_TLS segment p_vaddr. */
3109 elf_i386_dtpoff_base (struct bfd_link_info *info)
3111 /* If tls_sec is NULL, we should have signalled an error already. */
3112 if (elf_hash_table (info)->tls_sec == NULL)
3114 return elf_hash_table (info)->tls_sec->vma;
3117 /* Return the relocation value for @tpoff relocation
3118 if STT_TLS virtual address is ADDRESS. */
3121 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3123 struct elf_link_hash_table *htab = elf_hash_table (info);
3124 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3125 bfd_vma static_tls_size;
3127 /* If tls_sec is NULL, we should have signalled an error already. */
3128 if (htab->tls_sec == NULL)
3131 /* Consider special static TLS alignment requirements. */
3132 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3133 return static_tls_size + htab->tls_sec->vma - address;
3136 /* Relocate an i386 ELF section. */
3139 elf_i386_relocate_section (bfd *output_bfd,
3140 struct bfd_link_info *info,
3142 asection *input_section,
3144 Elf_Internal_Rela *relocs,
3145 Elf_Internal_Sym *local_syms,
3146 asection **local_sections)
3148 struct elf_i386_link_hash_table *htab;
3149 Elf_Internal_Shdr *symtab_hdr;
3150 struct elf_link_hash_entry **sym_hashes;
3151 bfd_vma *local_got_offsets;
3152 bfd_vma *local_tlsdesc_gotents;
3153 Elf_Internal_Rela *rel;
3154 Elf_Internal_Rela *relend;
3155 bfd_boolean is_vxworks_tls;
3156 unsigned plt_entry_size;
3158 BFD_ASSERT (is_i386_elf (input_bfd));
3160 htab = elf_i386_hash_table (info);
3163 symtab_hdr = &elf_symtab_hdr (input_bfd);
3164 sym_hashes = elf_sym_hashes (input_bfd);
3165 local_got_offsets = elf_local_got_offsets (input_bfd);
3166 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3167 /* We have to handle relocations in vxworks .tls_vars sections
3168 specially, because the dynamic loader is 'weird'. */
3169 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3171 && !strcmp (input_section->output_section->name,
3174 elf_i386_set_tls_module_base (info);
3176 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3179 relend = relocs + input_section->reloc_count;
3180 for (; rel < relend; rel++)
3182 unsigned int r_type;
3183 reloc_howto_type *howto;
3184 unsigned long r_symndx;
3185 struct elf_link_hash_entry *h;
3186 Elf_Internal_Sym *sym;
3188 bfd_vma off, offplt;
3190 bfd_boolean unresolved_reloc;
3191 bfd_reloc_status_type r;
3196 r_type = ELF32_R_TYPE (rel->r_info);
3197 if (r_type == R_386_GNU_VTINHERIT
3198 || r_type == R_386_GNU_VTENTRY)
3201 if ((indx = r_type) >= R_386_standard
3202 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3203 >= R_386_ext - R_386_standard)
3204 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3205 >= R_386_irelative - R_386_ext))
3207 (*_bfd_error_handler)
3208 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3209 input_bfd, input_section, r_type);
3210 bfd_set_error (bfd_error_bad_value);
3213 howto = elf_howto_table + indx;
3215 r_symndx = ELF32_R_SYM (rel->r_info);
3219 unresolved_reloc = FALSE;
3220 if (r_symndx < symtab_hdr->sh_info)
3222 sym = local_syms + r_symndx;
3223 sec = local_sections[r_symndx];
3224 relocation = (sec->output_section->vma
3225 + sec->output_offset
3227 st_size = sym->st_size;
3229 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3230 && ((sec->flags & SEC_MERGE) != 0
3231 || (info->relocatable
3232 && sec->output_offset != 0)))
3235 bfd_byte *where = contents + rel->r_offset;
3237 switch (howto->size)
3240 addend = bfd_get_8 (input_bfd, where);
3241 if (howto->pc_relative)
3243 addend = (addend ^ 0x80) - 0x80;
3248 addend = bfd_get_16 (input_bfd, where);
3249 if (howto->pc_relative)
3251 addend = (addend ^ 0x8000) - 0x8000;
3256 addend = bfd_get_32 (input_bfd, where);
3257 if (howto->pc_relative)
3259 addend = (addend ^ 0x80000000) - 0x80000000;
3267 if (info->relocatable)
3268 addend += sec->output_offset;
3271 asection *msec = sec;
3272 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3274 addend -= relocation;
3275 addend += msec->output_section->vma + msec->output_offset;
3278 switch (howto->size)
3281 /* FIXME: overflow checks. */
3282 if (howto->pc_relative)
3284 bfd_put_8 (input_bfd, addend, where);
3287 if (howto->pc_relative)
3289 bfd_put_16 (input_bfd, addend, where);
3292 if (howto->pc_relative)
3294 bfd_put_32 (input_bfd, addend, where);
3298 else if (!info->relocatable
3299 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3301 /* Relocate against local STT_GNU_IFUNC symbol. */
3302 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3307 /* Set STT_GNU_IFUNC symbol value. */
3308 h->root.u.def.value = sym->st_value;
3309 h->root.u.def.section = sec;
3314 bfd_boolean warned ATTRIBUTE_UNUSED;
3315 bfd_boolean ignored ATTRIBUTE_UNUSED;
3317 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3318 r_symndx, symtab_hdr, sym_hashes,
3320 unresolved_reloc, warned, ignored);
3324 if (sec != NULL && discarded_section (sec))
3325 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3326 rel, 1, relend, howto, 0, contents);
3328 if (info->relocatable)
3331 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3332 it here if it is defined in a non-shared object. */
3334 && h->type == STT_GNU_IFUNC
3337 asection *plt, *gotplt, *base_got;
3341 if ((input_section->flags & SEC_ALLOC) == 0
3342 || h->plt.offset == (bfd_vma) -1)
3345 /* STT_GNU_IFUNC symbol must go through PLT. */
3346 if (htab->elf.splt != NULL)
3348 plt = htab->elf.splt;
3349 gotplt = htab->elf.sgotplt;
3353 plt = htab->elf.iplt;
3354 gotplt = htab->elf.igotplt;
3357 relocation = (plt->output_section->vma
3358 + plt->output_offset + h->plt.offset);
3363 if (h->root.root.string)
3364 name = h->root.root.string;
3366 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3368 (*_bfd_error_handler)
3369 (_("%B: relocation %s against STT_GNU_IFUNC "
3370 "symbol `%s' isn't handled by %s"), input_bfd,
3371 elf_howto_table[r_type].name,
3372 name, __FUNCTION__);
3373 bfd_set_error (bfd_error_bad_value);
3377 /* Generate dynamic relcoation only when there is a
3378 non-GOT reference in a shared object. */
3379 if (info->shared && h->non_got_ref)
3381 Elf_Internal_Rela outrel;
3385 /* Need a dynamic relocation to get the real function
3387 offset = _bfd_elf_section_offset (output_bfd,
3391 if (offset == (bfd_vma) -1
3392 || offset == (bfd_vma) -2)
3395 outrel.r_offset = (input_section->output_section->vma
3396 + input_section->output_offset
3399 if (h->dynindx == -1
3401 || info->executable)
3403 /* This symbol is resolved locally. */
3404 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3405 bfd_put_32 (output_bfd,
3406 (h->root.u.def.value
3407 + h->root.u.def.section->output_section->vma
3408 + h->root.u.def.section->output_offset),
3412 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3414 sreloc = htab->elf.irelifunc;
3415 elf_append_rel (output_bfd, sreloc, &outrel);
3417 /* If this reloc is against an external symbol, we
3418 do not want to fiddle with the addend. Otherwise,
3419 we need to include the symbol value so that it
3420 becomes an addend for the dynamic reloc. For an
3421 internal symbol, we have updated addend. */
3430 base_got = htab->elf.sgot;
3431 off = h->got.offset;
3433 if (base_got == NULL)
3436 if (off == (bfd_vma) -1)
3438 /* We can't use h->got.offset here to save state, or
3439 even just remember the offset, as finish_dynamic_symbol
3440 would use that as offset into .got. */
3442 if (htab->elf.splt != NULL)
3444 plt_index = h->plt.offset / plt_entry_size - 1;
3445 off = (plt_index + 3) * 4;
3446 base_got = htab->elf.sgotplt;
3450 plt_index = h->plt.offset / plt_entry_size;
3451 off = plt_index * 4;
3452 base_got = htab->elf.igotplt;
3455 if (h->dynindx == -1
3459 /* This references the local defitionion. We must
3460 initialize this entry in the global offset table.
3461 Since the offset must always be a multiple of 8,
3462 we use the least significant bit to record
3463 whether we have initialized it already.
3465 When doing a dynamic link, we create a .rela.got
3466 relocation entry to initialize the value. This
3467 is done in the finish_dynamic_symbol routine. */
3472 bfd_put_32 (output_bfd, relocation,
3473 base_got->contents + off);
3480 /* Adjust for static executables. */
3481 if (htab->elf.splt == NULL)
3482 relocation += gotplt->output_offset;
3486 relocation = (base_got->output_section->vma
3487 + base_got->output_offset + off
3488 - gotplt->output_section->vma
3489 - gotplt->output_offset);
3490 /* Adjust for static executables. */
3491 if (htab->elf.splt == NULL)
3492 relocation += gotplt->output_offset;
3498 relocation -= (gotplt->output_section->vma
3499 + gotplt->output_offset);
3507 /* Relocation is to the entry for this symbol in the global
3509 if (htab->elf.sgot == NULL)
3516 off = h->got.offset;
3517 dyn = htab->elf.dynamic_sections_created;
3518 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3520 && SYMBOL_REFERENCES_LOCAL (info, h))
3521 || (ELF_ST_VISIBILITY (h->other)
3522 && h->root.type == bfd_link_hash_undefweak))
3524 /* This is actually a static link, or it is a
3525 -Bsymbolic link and the symbol is defined
3526 locally, or the symbol was forced to be local
3527 because of a version file. We must initialize
3528 this entry in the global offset table. Since the
3529 offset must always be a multiple of 4, we use the
3530 least significant bit to record whether we have
3531 initialized it already.
3533 When doing a dynamic link, we create a .rel.got
3534 relocation entry to initialize the value. This
3535 is done in the finish_dynamic_symbol routine. */
3540 bfd_put_32 (output_bfd, relocation,
3541 htab->elf.sgot->contents + off);
3546 unresolved_reloc = FALSE;
3550 if (local_got_offsets == NULL)
3553 off = local_got_offsets[r_symndx];
3555 /* The offset must always be a multiple of 4. We use
3556 the least significant bit to record whether we have
3557 already generated the necessary reloc. */
3562 bfd_put_32 (output_bfd, relocation,
3563 htab->elf.sgot->contents + off);
3568 Elf_Internal_Rela outrel;
3570 s = htab->elf.srelgot;
3574 outrel.r_offset = (htab->elf.sgot->output_section->vma
3575 + htab->elf.sgot->output_offset
3577 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3578 elf_append_rel (output_bfd, s, &outrel);
3581 local_got_offsets[r_symndx] |= 1;
3585 if (off >= (bfd_vma) -2)
3588 relocation = htab->elf.sgot->output_section->vma
3589 + htab->elf.sgot->output_offset + off
3590 - htab->elf.sgotplt->output_section->vma
3591 - htab->elf.sgotplt->output_offset;
3595 /* Relocation is relative to the start of the global offset
3598 /* Check to make sure it isn't a protected function symbol
3599 for shared library since it may not be local when used
3600 as function address. We also need to make sure that a
3601 symbol is defined locally. */
3602 if (info->shared && h)
3604 if (!h->def_regular)
3608 switch (ELF_ST_VISIBILITY (h->other))
3611 v = _("hidden symbol");
3614 v = _("internal symbol");
3617 v = _("protected symbol");
3624 (*_bfd_error_handler)
3625 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3626 input_bfd, v, h->root.root.string);
3627 bfd_set_error (bfd_error_bad_value);
3630 else if (!info->executable
3631 && !SYMBOLIC_BIND (info, h)
3632 && h->type == STT_FUNC
3633 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3635 (*_bfd_error_handler)
3636 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3637 input_bfd, h->root.root.string);
3638 bfd_set_error (bfd_error_bad_value);
3643 /* Note that sgot is not involved in this
3644 calculation. We always want the start of .got.plt. If we
3645 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3646 permitted by the ABI, we might have to change this
3648 relocation -= htab->elf.sgotplt->output_section->vma
3649 + htab->elf.sgotplt->output_offset;
3653 /* Use global offset table as symbol value. */
3654 relocation = htab->elf.sgotplt->output_section->vma
3655 + htab->elf.sgotplt->output_offset;
3656 unresolved_reloc = FALSE;
3660 /* Relocation is to the entry for this symbol in the
3661 procedure linkage table. */
3663 /* Resolve a PLT32 reloc against a local symbol directly,
3664 without using the procedure linkage table. */
3668 if (h->plt.offset == (bfd_vma) -1
3669 || htab->elf.splt == NULL)
3671 /* We didn't make a PLT entry for this symbol. This
3672 happens when statically linking PIC code, or when
3673 using -Bsymbolic. */
3677 relocation = (htab->elf.splt->output_section->vma
3678 + htab->elf.splt->output_offset
3680 unresolved_reloc = FALSE;
3684 /* Set to symbol size. */
3685 relocation = st_size;
3690 if ((input_section->flags & SEC_ALLOC) == 0
3696 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3697 || h->root.type != bfd_link_hash_undefweak)
3698 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3699 || !SYMBOL_CALLS_LOCAL (info, h)))
3700 || (ELIMINATE_COPY_RELOCS
3707 || h->root.type == bfd_link_hash_undefweak
3708 || h->root.type == bfd_link_hash_undefined)))
3710 Elf_Internal_Rela outrel;
3711 bfd_boolean skip, relocate;
3714 /* When generating a shared object, these relocations
3715 are copied into the output file to be resolved at run
3722 _bfd_elf_section_offset (output_bfd, info, input_section,
3724 if (outrel.r_offset == (bfd_vma) -1)
3726 else if (outrel.r_offset == (bfd_vma) -2)
3727 skip = TRUE, relocate = TRUE;
3728 outrel.r_offset += (input_section->output_section->vma
3729 + input_section->output_offset);
3732 memset (&outrel, 0, sizeof outrel);
3735 && (r_type == R_386_PC32
3737 || !SYMBOLIC_BIND (info, h)
3738 || !h->def_regular))
3739 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3742 /* This symbol is local, or marked to become local. */
3744 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3747 sreloc = elf_section_data (input_section)->sreloc;
3749 if (sreloc == NULL || sreloc->contents == NULL)
3751 r = bfd_reloc_notsupported;
3752 goto check_relocation_error;
3755 elf_append_rel (output_bfd, sreloc, &outrel);
3757 /* If this reloc is against an external symbol, we do
3758 not want to fiddle with the addend. Otherwise, we
3759 need to include the symbol value so that it becomes
3760 an addend for the dynamic reloc. */
3767 if (!info->executable)
3769 Elf_Internal_Rela outrel;
3772 outrel.r_offset = rel->r_offset
3773 + input_section->output_section->vma
3774 + input_section->output_offset;
3775 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3776 sreloc = elf_section_data (input_section)->sreloc;
3779 elf_append_rel (output_bfd, sreloc, &outrel);
3784 case R_386_TLS_GOTDESC:
3785 case R_386_TLS_DESC_CALL:
3786 case R_386_TLS_IE_32:
3787 case R_386_TLS_GOTIE:
3788 tls_type = GOT_UNKNOWN;
3789 if (h == NULL && local_got_offsets)
3790 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3792 tls_type = elf_i386_hash_entry(h)->tls_type;
3793 if (tls_type == GOT_TLS_IE)
3794 tls_type = GOT_TLS_IE_NEG;
3796 if (! elf_i386_tls_transition (info, input_bfd,
3797 input_section, contents,
3798 symtab_hdr, sym_hashes,
3799 &r_type, tls_type, rel,
3800 relend, h, r_symndx))
3803 if (r_type == R_386_TLS_LE_32)
3805 BFD_ASSERT (! unresolved_reloc);
3806 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3811 /* GD->LE transition. */
3812 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3815 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3817 movl %gs:0, %eax; subl $foo@tpoff, %eax
3818 (6 byte form of subl). */
3819 memcpy (contents + rel->r_offset - 3,
3820 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3821 roff = rel->r_offset + 5;
3825 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3827 movl %gs:0, %eax; subl $foo@tpoff, %eax
3828 (6 byte form of subl). */
3829 memcpy (contents + rel->r_offset - 2,
3830 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3831 roff = rel->r_offset + 6;
3833 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3835 /* Skip R_386_PC32/R_386_PLT32. */
3839 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3841 /* GDesc -> LE transition.
3842 It's originally something like:
3843 leal x@tlsdesc(%ebx), %eax
3847 Registers other than %eax may be set up here. */
3852 roff = rel->r_offset;
3853 val = bfd_get_8 (input_bfd, contents + roff - 1);
3855 /* Now modify the instruction as appropriate. */
3856 /* aoliva FIXME: remove the above and xor the byte
3858 bfd_put_8 (output_bfd, val ^ 0x86,
3859 contents + roff - 1);
3860 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3864 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3866 /* GDesc -> LE transition.
3874 roff = rel->r_offset;
3875 bfd_put_8 (output_bfd, 0x66, contents + roff);
3876 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3879 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3883 /* IE->LE transition:
3884 Originally it can be one of:
3892 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3895 /* movl foo, %eax. */
3896 bfd_put_8 (output_bfd, 0xb8,
3897 contents + rel->r_offset - 1);
3903 type = bfd_get_8 (input_bfd,
3904 contents + rel->r_offset - 2);
3909 bfd_put_8 (output_bfd, 0xc7,
3910 contents + rel->r_offset - 2);
3911 bfd_put_8 (output_bfd,
3912 0xc0 | ((val >> 3) & 7),
3913 contents + rel->r_offset - 1);
3917 bfd_put_8 (output_bfd, 0x81,
3918 contents + rel->r_offset - 2);
3919 bfd_put_8 (output_bfd,
3920 0xc0 | ((val >> 3) & 7),
3921 contents + rel->r_offset - 1);
3928 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3929 contents + rel->r_offset);
3934 unsigned int val, type;
3936 /* {IE_32,GOTIE}->LE transition:
3937 Originally it can be one of:
3938 subl foo(%reg1), %reg2
3939 movl foo(%reg1), %reg2
3940 addl foo(%reg1), %reg2
3943 movl $foo, %reg2 (6 byte form)
3944 addl $foo, %reg2. */
3945 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3946 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3950 bfd_put_8 (output_bfd, 0xc7,
3951 contents + rel->r_offset - 2);
3952 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3953 contents + rel->r_offset - 1);
3955 else if (type == 0x2b)
3958 bfd_put_8 (output_bfd, 0x81,
3959 contents + rel->r_offset - 2);
3960 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3961 contents + rel->r_offset - 1);
3963 else if (type == 0x03)
3966 bfd_put_8 (output_bfd, 0x81,
3967 contents + rel->r_offset - 2);
3968 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3969 contents + rel->r_offset - 1);
3973 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3974 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3975 contents + rel->r_offset);
3977 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3978 contents + rel->r_offset);
3983 if (htab->elf.sgot == NULL)
3988 off = h->got.offset;
3989 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
3993 if (local_got_offsets == NULL)
3996 off = local_got_offsets[r_symndx];
3997 offplt = local_tlsdesc_gotents[r_symndx];
4004 Elf_Internal_Rela outrel;
4008 if (htab->elf.srelgot == NULL)
4011 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4013 if (GOT_TLS_GDESC_P (tls_type))
4016 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4017 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4018 <= htab->elf.sgotplt->size);
4019 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4020 + htab->elf.sgotplt->output_offset
4022 + htab->sgotplt_jump_table_size);
4023 sreloc = htab->elf.srelplt;
4024 loc = sreloc->contents;
4025 loc += (htab->next_tls_desc_index++
4026 * sizeof (Elf32_External_Rel));
4027 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4028 <= sreloc->contents + sreloc->size);
4029 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4032 BFD_ASSERT (! unresolved_reloc);
4033 bfd_put_32 (output_bfd,
4034 relocation - elf_i386_dtpoff_base (info),
4035 htab->elf.sgotplt->contents + offplt
4036 + htab->sgotplt_jump_table_size + 4);
4040 bfd_put_32 (output_bfd, 0,
4041 htab->elf.sgotplt->contents + offplt
4042 + htab->sgotplt_jump_table_size + 4);
4046 sreloc = htab->elf.srelgot;
4048 outrel.r_offset = (htab->elf.sgot->output_section->vma
4049 + htab->elf.sgot->output_offset + off);
4051 if (GOT_TLS_GD_P (tls_type))
4052 dr_type = R_386_TLS_DTPMOD32;
4053 else if (GOT_TLS_GDESC_P (tls_type))
4055 else if (tls_type == GOT_TLS_IE_POS)
4056 dr_type = R_386_TLS_TPOFF;
4058 dr_type = R_386_TLS_TPOFF32;
4060 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4061 bfd_put_32 (output_bfd,
4062 relocation - elf_i386_dtpoff_base (info),
4063 htab->elf.sgot->contents + off);
4064 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4065 bfd_put_32 (output_bfd,
4066 elf_i386_dtpoff_base (info) - relocation,
4067 htab->elf.sgot->contents + off);
4068 else if (dr_type != R_386_TLS_DESC)
4069 bfd_put_32 (output_bfd, 0,
4070 htab->elf.sgot->contents + off);
4071 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4073 elf_append_rel (output_bfd, sreloc, &outrel);
4075 if (GOT_TLS_GD_P (tls_type))
4079 BFD_ASSERT (! unresolved_reloc);
4080 bfd_put_32 (output_bfd,
4081 relocation - elf_i386_dtpoff_base (info),
4082 htab->elf.sgot->contents + off + 4);
4086 bfd_put_32 (output_bfd, 0,
4087 htab->elf.sgot->contents + off + 4);
4088 outrel.r_info = ELF32_R_INFO (indx,
4089 R_386_TLS_DTPOFF32);
4090 outrel.r_offset += 4;
4091 elf_append_rel (output_bfd, sreloc, &outrel);
4094 else if (tls_type == GOT_TLS_IE_BOTH)
4096 bfd_put_32 (output_bfd,
4098 ? relocation - elf_i386_dtpoff_base (info)
4100 htab->elf.sgot->contents + off + 4);
4101 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4102 outrel.r_offset += 4;
4103 elf_append_rel (output_bfd, sreloc, &outrel);
4110 local_got_offsets[r_symndx] |= 1;
4113 if (off >= (bfd_vma) -2
4114 && ! GOT_TLS_GDESC_P (tls_type))
4116 if (r_type == R_386_TLS_GOTDESC
4117 || r_type == R_386_TLS_DESC_CALL)
4119 relocation = htab->sgotplt_jump_table_size + offplt;
4120 unresolved_reloc = FALSE;
4122 else if (r_type == ELF32_R_TYPE (rel->r_info))
4124 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4125 + htab->elf.sgotplt->output_offset;
4126 relocation = htab->elf.sgot->output_section->vma
4127 + htab->elf.sgot->output_offset + off - g_o_t;
4128 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4129 && tls_type == GOT_TLS_IE_BOTH)
4131 if (r_type == R_386_TLS_IE)
4132 relocation += g_o_t;
4133 unresolved_reloc = FALSE;
4135 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4137 unsigned int val, type;
4140 /* GD->IE transition. */
4141 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4142 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4145 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4147 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4149 roff = rel->r_offset - 3;
4153 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4155 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4156 roff = rel->r_offset - 2;
4158 memcpy (contents + roff,
4159 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4160 contents[roff + 7] = 0x80 | (val & 7);
4161 /* If foo is used only with foo@gotntpoff(%reg) and
4162 foo@indntpoff, but not with foo@gottpoff(%reg), change
4163 subl $foo@gottpoff(%reg), %eax
4165 addl $foo@gotntpoff(%reg), %eax. */
4166 if (tls_type == GOT_TLS_IE_POS)
4167 contents[roff + 6] = 0x03;
4168 bfd_put_32 (output_bfd,
4169 htab->elf.sgot->output_section->vma
4170 + htab->elf.sgot->output_offset + off
4171 - htab->elf.sgotplt->output_section->vma
4172 - htab->elf.sgotplt->output_offset,
4173 contents + roff + 8);
4174 /* Skip R_386_PLT32. */
4178 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4180 /* GDesc -> IE transition.
4181 It's originally something like:
4182 leal x@tlsdesc(%ebx), %eax
4185 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4187 movl x@gottpoff(%ebx), %eax # before negl %eax
4189 Registers other than %eax may be set up here. */
4193 /* First, make sure it's a leal adding ebx to a 32-bit
4194 offset into any register, although it's probably
4195 almost always going to be eax. */
4196 roff = rel->r_offset;
4198 /* Now modify the instruction as appropriate. */
4199 /* To turn a leal into a movl in the form we use it, it
4200 suffices to change the first byte from 0x8d to 0x8b.
4201 aoliva FIXME: should we decide to keep the leal, all
4202 we have to do is remove the statement below, and
4203 adjust the relaxation of R_386_TLS_DESC_CALL. */
4204 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4206 if (tls_type == GOT_TLS_IE_BOTH)
4209 bfd_put_32 (output_bfd,
4210 htab->elf.sgot->output_section->vma
4211 + htab->elf.sgot->output_offset + off
4212 - htab->elf.sgotplt->output_section->vma
4213 - htab->elf.sgotplt->output_offset,
4217 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4219 /* GDesc -> IE transition.
4227 depending on how we transformed the TLS_GOTDESC above.
4232 roff = rel->r_offset;
4234 /* Now modify the instruction as appropriate. */
4235 if (tls_type != GOT_TLS_IE_NEG)
4238 bfd_put_8 (output_bfd, 0x66, contents + roff);
4239 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4244 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4245 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4255 if (! elf_i386_tls_transition (info, input_bfd,
4256 input_section, contents,
4257 symtab_hdr, sym_hashes,
4258 &r_type, GOT_UNKNOWN, rel,
4259 relend, h, r_symndx))
4262 if (r_type != R_386_TLS_LDM)
4264 /* LD->LE transition:
4265 leal foo(%reg), %eax; call ___tls_get_addr.
4267 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4268 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4269 memcpy (contents + rel->r_offset - 2,
4270 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4271 /* Skip R_386_PC32/R_386_PLT32. */
4276 if (htab->elf.sgot == NULL)
4279 off = htab->tls_ldm_got.offset;
4284 Elf_Internal_Rela outrel;
4286 if (htab->elf.srelgot == NULL)
4289 outrel.r_offset = (htab->elf.sgot->output_section->vma
4290 + htab->elf.sgot->output_offset + off);
4292 bfd_put_32 (output_bfd, 0,
4293 htab->elf.sgot->contents + off);
4294 bfd_put_32 (output_bfd, 0,
4295 htab->elf.sgot->contents + off + 4);
4296 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4297 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4298 htab->tls_ldm_got.offset |= 1;
4300 relocation = htab->elf.sgot->output_section->vma
4301 + htab->elf.sgot->output_offset + off
4302 - htab->elf.sgotplt->output_section->vma
4303 - htab->elf.sgotplt->output_offset;
4304 unresolved_reloc = FALSE;
4307 case R_386_TLS_LDO_32:
4308 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
4309 relocation -= elf_i386_dtpoff_base (info);
4311 /* When converting LDO to LE, we must negate. */
4312 relocation = -elf_i386_tpoff (info, relocation);
4315 case R_386_TLS_LE_32:
4317 if (!info->executable)
4319 Elf_Internal_Rela outrel;
4322 outrel.r_offset = rel->r_offset
4323 + input_section->output_section->vma
4324 + input_section->output_offset;
4325 if (h != NULL && h->dynindx != -1)
4329 if (r_type == R_386_TLS_LE_32)
4330 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4332 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4333 sreloc = elf_section_data (input_section)->sreloc;
4336 elf_append_rel (output_bfd, sreloc, &outrel);
4339 else if (r_type == R_386_TLS_LE_32)
4340 relocation = elf_i386_dtpoff_base (info) - relocation;
4342 relocation -= elf_i386_dtpoff_base (info);
4344 else if (r_type == R_386_TLS_LE_32)
4345 relocation = elf_i386_tpoff (info, relocation);
4347 relocation = -elf_i386_tpoff (info, relocation);
4354 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4355 because such sections are not SEC_ALLOC and thus ld.so will
4356 not process them. */
4357 if (unresolved_reloc
4358 && !((input_section->flags & SEC_DEBUGGING) != 0
4360 && _bfd_elf_section_offset (output_bfd, info, input_section,
4361 rel->r_offset) != (bfd_vma) -1)
4363 (*_bfd_error_handler)
4364 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4367 (long) rel->r_offset,
4369 h->root.root.string);
4374 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4375 contents, rel->r_offset,
4378 check_relocation_error:
4379 if (r != bfd_reloc_ok)
4384 name = h->root.root.string;
4387 name = bfd_elf_string_from_elf_section (input_bfd,
4388 symtab_hdr->sh_link,
4393 name = bfd_section_name (input_bfd, sec);
4396 if (r == bfd_reloc_overflow)
4398 if (! ((*info->callbacks->reloc_overflow)
4399 (info, (h ? &h->root : NULL), name, howto->name,
4400 (bfd_vma) 0, input_bfd, input_section,
4406 (*_bfd_error_handler)
4407 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4408 input_bfd, input_section,
4409 (long) rel->r_offset, name, (int) r);
4418 /* Finish up dynamic symbol handling. We set the contents of various
4419 dynamic sections here. */
4422 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4423 struct bfd_link_info *info,
4424 struct elf_link_hash_entry *h,
4425 Elf_Internal_Sym *sym)
4427 struct elf_i386_link_hash_table *htab;
4428 unsigned plt_entry_size;
4429 const struct elf_i386_backend_data *abed;
4431 htab = elf_i386_hash_table (info);
4435 abed = get_elf_i386_backend_data (output_bfd);
4436 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
4438 if (h->plt.offset != (bfd_vma) -1)
4442 Elf_Internal_Rela rel;
4444 asection *plt, *gotplt, *relplt;
4446 /* When building a static executable, use .iplt, .igot.plt and
4447 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4448 if (htab->elf.splt != NULL)
4450 plt = htab->elf.splt;
4451 gotplt = htab->elf.sgotplt;
4452 relplt = htab->elf.srelplt;
4456 plt = htab->elf.iplt;
4457 gotplt = htab->elf.igotplt;
4458 relplt = htab->elf.irelplt;
4461 /* This symbol has an entry in the procedure linkage table. Set
4464 if ((h->dynindx == -1
4465 && !((h->forced_local || info->executable)
4467 && h->type == STT_GNU_IFUNC))
4473 /* Get the index in the procedure linkage table which
4474 corresponds to this symbol. This is the index of this symbol
4475 in all the symbols for which we are making plt entries. The
4476 first entry in the procedure linkage table is reserved.
4478 Get the offset into the .got table of the entry that
4479 corresponds to this function. Each .got entry is 4 bytes.
4480 The first three are reserved.
4482 For static executables, we don't reserve anything. */
4484 if (plt == htab->elf.splt)
4486 got_offset = h->plt.offset / plt_entry_size - 1;
4487 got_offset = (got_offset + 3) * 4;
4491 got_offset = h->plt.offset / plt_entry_size;
4492 got_offset = got_offset * 4;
4495 /* Fill in the entry in the procedure linkage table. */
4498 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
4499 abed->plt->plt_entry_size);
4500 bfd_put_32 (output_bfd,
4501 (gotplt->output_section->vma
4502 + gotplt->output_offset
4504 plt->contents + h->plt.offset
4505 + abed->plt->plt_got_offset);
4507 if (abed->is_vxworks)
4509 int s, k, reloc_index;
4511 /* Create the R_386_32 relocation referencing the GOT
4512 for this PLT entry. */
4514 /* S: Current slot number (zero-based). */
4515 s = ((h->plt.offset - abed->plt->plt_entry_size)
4516 / abed->plt->plt_entry_size);
4517 /* K: Number of relocations for PLTResolve. */
4519 k = PLTRESOLVE_RELOCS_SHLIB;
4521 k = PLTRESOLVE_RELOCS;
4522 /* Skip the PLTresolve relocations, and the relocations for
4523 the other PLT slots. */
4524 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4525 loc = (htab->srelplt2->contents + reloc_index
4526 * sizeof (Elf32_External_Rel));
4528 rel.r_offset = (htab->elf.splt->output_section->vma
4529 + htab->elf.splt->output_offset
4530 + h->plt.offset + 2),
4531 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4532 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4534 /* Create the R_386_32 relocation referencing the beginning of
4535 the PLT for this GOT entry. */
4536 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4537 + htab->elf.sgotplt->output_offset
4539 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4540 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4541 loc + sizeof (Elf32_External_Rel));
4546 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
4547 abed->plt->plt_entry_size);
4548 bfd_put_32 (output_bfd, got_offset,
4549 plt->contents + h->plt.offset
4550 + abed->plt->plt_got_offset);
4553 /* Fill in the entry in the global offset table. */
4554 bfd_put_32 (output_bfd,
4555 (plt->output_section->vma
4556 + plt->output_offset
4558 + abed->plt->plt_lazy_offset),
4559 gotplt->contents + got_offset);
4561 /* Fill in the entry in the .rel.plt section. */
4562 rel.r_offset = (gotplt->output_section->vma
4563 + gotplt->output_offset
4565 if (h->dynindx == -1
4566 || ((info->executable
4567 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4569 && h->type == STT_GNU_IFUNC))
4571 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4572 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4573 in the .got.plt section. */
4574 bfd_put_32 (output_bfd,
4575 (h->root.u.def.value
4576 + h->root.u.def.section->output_section->vma
4577 + h->root.u.def.section->output_offset),
4578 gotplt->contents + got_offset);
4579 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4580 /* R_386_IRELATIVE comes last. */
4581 plt_index = htab->next_irelative_index--;
4585 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4586 plt_index = htab->next_jump_slot_index++;
4588 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4589 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4591 /* Don't fill PLT entry for static executables. */
4592 if (plt == htab->elf.splt)
4594 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4595 plt->contents + h->plt.offset
4596 + abed->plt->plt_reloc_offset);
4597 bfd_put_32 (output_bfd, - (h->plt.offset
4598 + abed->plt->plt_plt_offset + 4),
4599 plt->contents + h->plt.offset
4600 + abed->plt->plt_plt_offset);
4603 if (!h->def_regular)
4605 /* Mark the symbol as undefined, rather than as defined in
4606 the .plt section. Leave the value if there were any
4607 relocations where pointer equality matters (this is a clue
4608 for the dynamic linker, to make function pointer
4609 comparisons work between an application and shared
4610 library), otherwise set it to zero. If a function is only
4611 called from a binary, there is no need to slow down
4612 shared libraries because of that. */
4613 sym->st_shndx = SHN_UNDEF;
4614 if (!h->pointer_equality_needed)
4619 if (h->got.offset != (bfd_vma) -1
4620 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4621 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4623 Elf_Internal_Rela rel;
4625 /* This symbol has an entry in the global offset table. Set it
4628 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4631 rel.r_offset = (htab->elf.sgot->output_section->vma
4632 + htab->elf.sgot->output_offset
4633 + (h->got.offset & ~(bfd_vma) 1));
4635 /* If this is a static link, or it is a -Bsymbolic link and the
4636 symbol is defined locally or was forced to be local because
4637 of a version file, we just want to emit a RELATIVE reloc.
4638 The entry in the global offset table will already have been
4639 initialized in the relocate_section function. */
4641 && h->type == STT_GNU_IFUNC)
4645 /* Generate R_386_GLOB_DAT. */
4652 if (!h->pointer_equality_needed)
4655 /* For non-shared object, we can't use .got.plt, which
4656 contains the real function addres if we need pointer
4657 equality. We load the GOT entry with the PLT entry. */
4658 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4659 bfd_put_32 (output_bfd,
4660 (plt->output_section->vma
4661 + plt->output_offset + h->plt.offset),
4662 htab->elf.sgot->contents + h->got.offset);
4666 else if (info->shared
4667 && SYMBOL_REFERENCES_LOCAL (info, h))
4669 BFD_ASSERT((h->got.offset & 1) != 0);
4670 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4674 BFD_ASSERT((h->got.offset & 1) == 0);
4676 bfd_put_32 (output_bfd, (bfd_vma) 0,
4677 htab->elf.sgot->contents + h->got.offset);
4678 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4681 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
4686 Elf_Internal_Rela rel;
4688 /* This symbol needs a copy reloc. Set it up. */
4690 if (h->dynindx == -1
4691 || (h->root.type != bfd_link_hash_defined
4692 && h->root.type != bfd_link_hash_defweak)
4693 || htab->srelbss == NULL)
4696 rel.r_offset = (h->root.u.def.value
4697 + h->root.u.def.section->output_section->vma
4698 + h->root.u.def.section->output_offset);
4699 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4700 elf_append_rel (output_bfd, htab->srelbss, &rel);
4706 /* Finish up local dynamic symbol handling. We set the contents of
4707 various dynamic sections here. */
4710 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4712 struct elf_link_hash_entry *h
4713 = (struct elf_link_hash_entry *) *slot;
4714 struct bfd_link_info *info
4715 = (struct bfd_link_info *) inf;
4717 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4721 /* Used to decide how to sort relocs in an optimal manner for the
4722 dynamic linker, before writing them out. */
4724 static enum elf_reloc_type_class
4725 elf_i386_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4726 const asection *rel_sec ATTRIBUTE_UNUSED,
4727 const Elf_Internal_Rela *rela)
4729 switch (ELF32_R_TYPE (rela->r_info))
4731 case R_386_RELATIVE:
4732 return reloc_class_relative;
4733 case R_386_JUMP_SLOT:
4734 return reloc_class_plt;
4736 return reloc_class_copy;
4738 return reloc_class_normal;
4742 /* Finish up the dynamic sections. */
4745 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4746 struct bfd_link_info *info)
4748 struct elf_i386_link_hash_table *htab;
4751 const struct elf_i386_backend_data *abed;
4753 htab = elf_i386_hash_table (info);
4757 dynobj = htab->elf.dynobj;
4758 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4759 abed = get_elf_i386_backend_data (output_bfd);
4761 if (htab->elf.dynamic_sections_created)
4763 Elf32_External_Dyn *dyncon, *dynconend;
4765 if (sdyn == NULL || htab->elf.sgot == NULL)
4768 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4769 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4770 for (; dyncon < dynconend; dyncon++)
4772 Elf_Internal_Dyn dyn;
4775 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4780 if (abed->is_vxworks
4781 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4786 s = htab->elf.sgotplt;
4787 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4791 s = htab->elf.srelplt;
4792 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4796 s = htab->elf.srelplt;
4797 dyn.d_un.d_val = s->size;
4801 /* My reading of the SVR4 ABI indicates that the
4802 procedure linkage table relocs (DT_JMPREL) should be
4803 included in the overall relocs (DT_REL). This is
4804 what Solaris does. However, UnixWare can not handle
4805 that case. Therefore, we override the DT_RELSZ entry
4806 here to make it not include the JMPREL relocs. */
4807 s = htab->elf.srelplt;
4810 dyn.d_un.d_val -= s->size;
4814 /* We may not be using the standard ELF linker script.
4815 If .rel.plt is the first .rel section, we adjust
4816 DT_REL to not include it. */
4817 s = htab->elf.srelplt;
4820 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4822 dyn.d_un.d_ptr += s->size;
4826 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4829 /* Fill in the first entry in the procedure linkage table. */
4830 if (htab->elf.splt && htab->elf.splt->size > 0)
4834 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
4835 abed->plt->plt0_entry_size);
4836 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
4837 abed->plt0_pad_byte,
4838 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
4842 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
4843 abed->plt->plt0_entry_size);
4844 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
4845 abed->plt0_pad_byte,
4846 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
4847 bfd_put_32 (output_bfd,
4848 (htab->elf.sgotplt->output_section->vma
4849 + htab->elf.sgotplt->output_offset
4851 htab->elf.splt->contents
4852 + abed->plt->plt0_got1_offset);
4853 bfd_put_32 (output_bfd,
4854 (htab->elf.sgotplt->output_section->vma
4855 + htab->elf.sgotplt->output_offset
4857 htab->elf.splt->contents
4858 + abed->plt->plt0_got2_offset);
4860 if (abed->is_vxworks)
4862 Elf_Internal_Rela rel;
4864 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4865 On IA32 we use REL relocations so the addend goes in
4866 the PLT directly. */
4867 rel.r_offset = (htab->elf.splt->output_section->vma
4868 + htab->elf.splt->output_offset
4869 + abed->plt->plt0_got1_offset);
4870 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4871 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4872 htab->srelplt2->contents);
4873 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4874 rel.r_offset = (htab->elf.splt->output_section->vma
4875 + htab->elf.splt->output_offset
4876 + abed->plt->plt0_got2_offset);
4877 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4878 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4879 htab->srelplt2->contents +
4880 sizeof (Elf32_External_Rel));
4884 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4885 really seem like the right value. */
4886 elf_section_data (htab->elf.splt->output_section)
4887 ->this_hdr.sh_entsize = 4;
4889 /* Correct the .rel.plt.unloaded relocations. */
4890 if (abed->is_vxworks && !info->shared)
4892 int num_plts = (htab->elf.splt->size
4893 / abed->plt->plt_entry_size) - 1;
4896 p = htab->srelplt2->contents;
4898 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4900 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4902 for (; num_plts; num_plts--)
4904 Elf_Internal_Rela rel;
4905 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4906 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4907 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4908 p += sizeof (Elf32_External_Rel);
4910 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4911 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4912 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4913 p += sizeof (Elf32_External_Rel);
4919 if (htab->elf.sgotplt)
4921 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4923 (*_bfd_error_handler)
4924 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4928 /* Fill in the first three entries in the global offset table. */
4929 if (htab->elf.sgotplt->size > 0)
4931 bfd_put_32 (output_bfd,
4933 : sdyn->output_section->vma + sdyn->output_offset),
4934 htab->elf.sgotplt->contents);
4935 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4936 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
4939 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
4942 /* Adjust .eh_frame for .plt section. */
4943 if (htab->plt_eh_frame != NULL
4944 && htab->plt_eh_frame->contents != NULL)
4946 if (htab->elf.splt != NULL
4947 && htab->elf.splt->size != 0
4948 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4949 && htab->elf.splt->output_section != NULL
4950 && htab->plt_eh_frame->output_section != NULL)
4952 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4953 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4954 + htab->plt_eh_frame->output_offset
4955 + PLT_FDE_START_OFFSET;
4956 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4957 htab->plt_eh_frame->contents
4958 + PLT_FDE_START_OFFSET);
4960 if (htab->plt_eh_frame->sec_info_type
4961 == SEC_INFO_TYPE_EH_FRAME)
4963 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4965 htab->plt_eh_frame->contents))
4970 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4971 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
4973 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4974 htab_traverse (htab->loc_hash_table,
4975 elf_i386_finish_local_dynamic_symbol,
4981 /* Return an array of PLT entry symbol values. */
4984 elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
4987 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
4990 bfd_vma *plt_sym_val;
4992 bfd_byte *plt_contents;
4993 const struct elf_i386_backend_data *bed
4994 = get_elf_i386_backend_data (abfd);
4995 Elf_Internal_Shdr *hdr;
4997 /* Get the .plt section contents. */
4998 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
4999 if (plt_contents == NULL)
5001 if (!bfd_get_section_contents (abfd, (asection *) plt,
5002 plt_contents, 0, plt->size))
5005 free (plt_contents);
5009 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5010 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5013 hdr = &elf_section_data (relplt)->this_hdr;
5014 count = relplt->size / hdr->sh_entsize;
5016 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5017 if (plt_sym_val == NULL)
5020 for (i = 0; i < count; i++)
5021 plt_sym_val[i] = -1;
5023 plt_offset = bed->plt->plt_entry_size;
5024 p = relplt->relocation;
5025 for (i = 0; i < count; i++, p++)
5029 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5030 if (p->howto == NULL)
5033 if (p->howto->type != R_386_JUMP_SLOT
5034 && p->howto->type != R_386_IRELATIVE)
5037 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5038 + bed->plt->plt_reloc_offset));
5039 reloc_index /= sizeof (Elf32_External_Rel);
5040 if (reloc_index >= count)
5042 plt_sym_val[reloc_index] = plt->vma + plt_offset;
5043 plt_offset += bed->plt->plt_entry_size;
5046 free (plt_contents);
5051 /* Similar to _bfd_elf_get_synthetic_symtab. */
5054 elf_i386_get_synthetic_symtab (bfd *abfd,
5061 asection *plt = bfd_get_section_by_name (abfd, ".plt");
5062 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5063 dynsymcount, dynsyms, ret,
5065 elf_i386_get_plt_sym_val);
5068 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5071 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5073 if (h->plt.offset != (bfd_vma) -1
5075 && !h->pointer_equality_needed)
5078 return _bfd_elf_hash_symbol (h);
5081 /* Hook called by the linker routine which adds symbols from an object
5085 elf_i386_add_symbol_hook (bfd * abfd,
5086 struct bfd_link_info * info,
5087 Elf_Internal_Sym * sym,
5088 const char ** namep ATTRIBUTE_UNUSED,
5089 flagword * flagsp ATTRIBUTE_UNUSED,
5090 asection ** secp ATTRIBUTE_UNUSED,
5091 bfd_vma * valp ATTRIBUTE_UNUSED)
5093 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
5094 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
5095 && (abfd->flags & DYNAMIC) == 0
5096 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
5097 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
5102 #define TARGET_LITTLE_SYM i386_elf32_vec
5103 #define TARGET_LITTLE_NAME "elf32-i386"
5104 #define ELF_ARCH bfd_arch_i386
5105 #define ELF_TARGET_ID I386_ELF_DATA
5106 #define ELF_MACHINE_CODE EM_386
5107 #define ELF_MAXPAGESIZE 0x1000
5109 #define elf_backend_can_gc_sections 1
5110 #define elf_backend_can_refcount 1
5111 #define elf_backend_want_got_plt 1
5112 #define elf_backend_plt_readonly 1
5113 #define elf_backend_want_plt_sym 0
5114 #define elf_backend_got_header_size 12
5115 #define elf_backend_plt_alignment 4
5117 /* Support RELA for objdump of prelink objects. */
5118 #define elf_info_to_howto elf_i386_info_to_howto_rel
5119 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5121 #define bfd_elf32_mkobject elf_i386_mkobject
5123 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5124 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5125 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5126 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5127 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5129 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5130 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5131 #define elf_backend_check_relocs elf_i386_check_relocs
5132 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5133 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5134 #define elf_backend_fake_sections elf_i386_fake_sections
5135 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5136 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5137 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5138 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5139 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5140 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5141 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5142 #define elf_backend_relocate_section elf_i386_relocate_section
5143 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5144 #define elf_backend_always_size_sections elf_i386_always_size_sections
5145 #define elf_backend_omit_section_dynsym \
5146 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5147 #define elf_backend_hash_symbol elf_i386_hash_symbol
5148 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5150 #include "elf32-target.h"
5152 /* FreeBSD support. */
5154 #undef TARGET_LITTLE_SYM
5155 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5156 #undef TARGET_LITTLE_NAME
5157 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5159 #define ELF_OSABI ELFOSABI_FREEBSD
5161 /* The kernel recognizes executables as valid only if they carry a
5162 "FreeBSD" label in the ELF header. So we put this label on all
5163 executables and (for simplicity) also all other object files. */
5166 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5168 _bfd_elf_post_process_headers (abfd, info);
5170 #ifdef OLD_FREEBSD_ABI_LABEL
5172 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5173 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5174 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5179 #undef elf_backend_post_process_headers
5180 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5182 #define elf32_bed elf32_i386_fbsd_bed
5184 #undef elf_backend_add_symbol_hook
5186 #include "elf32-target.h"
5190 #undef TARGET_LITTLE_SYM
5191 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5192 #undef TARGET_LITTLE_NAME
5193 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5195 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5196 objects won't be recognized. */
5200 #define elf32_bed elf32_i386_sol2_bed
5202 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5204 #undef elf_backend_static_tls_alignment
5205 #define elf_backend_static_tls_alignment 8
5207 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5209 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5211 #undef elf_backend_want_plt_sym
5212 #define elf_backend_want_plt_sym 1
5214 #include "elf32-target.h"
5216 /* Native Client support. */
5218 #undef TARGET_LITTLE_SYM
5219 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5220 #undef TARGET_LITTLE_NAME
5221 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5223 #define elf32_bed elf32_i386_nacl_bed
5225 #undef ELF_MAXPAGESIZE
5226 #define ELF_MAXPAGESIZE 0x10000
5228 /* Restore defaults. */
5230 #undef elf_backend_want_plt_sym
5231 #define elf_backend_want_plt_sym 0
5232 #undef elf_backend_post_process_headers
5233 #undef elf_backend_static_tls_alignment
5235 /* NaCl uses substantially different PLT entries for the same effects. */
5237 #undef elf_backend_plt_alignment
5238 #define elf_backend_plt_alignment 5
5239 #define NACL_PLT_ENTRY_SIZE 64
5240 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5242 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5244 0xff, 0x35, /* pushl contents of address */
5245 0, 0, 0, 0, /* replaced with address of .got + 4. */
5246 0x8b, 0x0d, /* movl contents of address, %ecx */
5247 0, 0, 0, 0, /* replaced with address of .got + 8. */
5248 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5249 0xff, 0xe1 /* jmp *%ecx */
5252 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5254 0x8b, 0x0d, /* movl contents of address, %ecx */
5255 0, 0, 0, 0, /* replaced with GOT slot address. */
5256 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5257 0xff, 0xe1, /* jmp *%ecx */
5259 /* Pad to the next 32-byte boundary with nop instructions. */
5261 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5262 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5264 /* Lazy GOT entries point here (32-byte aligned). */
5265 0x68, /* pushl immediate */
5266 0, 0, 0, 0, /* replaced with reloc offset. */
5267 0xe9, /* jmp relative */
5268 0, 0, 0, 0, /* replaced with offset to .plt. */
5270 /* Pad to the next 32-byte boundary with nop instructions. */
5271 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5272 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5276 static const bfd_byte
5277 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5279 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5280 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5281 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5282 0xff, 0xe1, /* jmp *%ecx */
5284 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5285 so pad to that size with nop instructions. */
5286 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5289 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5291 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5292 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5293 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5294 0xff, 0xe1, /* jmp *%ecx */
5296 /* Pad to the next 32-byte boundary with nop instructions. */
5298 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5299 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5301 /* Lazy GOT entries point here (32-byte aligned). */
5302 0x68, /* pushl immediate */
5303 0, 0, 0, 0, /* replaced with offset into relocation table. */
5304 0xe9, /* jmp relative */
5305 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5307 /* Pad to the next 32-byte boundary with nop instructions. */
5308 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5309 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5313 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5315 #if (PLT_CIE_LENGTH != 20 \
5316 || PLT_FDE_LENGTH != 36 \
5317 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5318 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5319 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5321 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5322 0, 0, 0, 0, /* CIE ID */
5323 1, /* CIE version */
5324 'z', 'R', 0, /* Augmentation string */
5325 1, /* Code alignment factor */
5326 0x7c, /* Data alignment factor: -4 */
5327 8, /* Return address column */
5328 1, /* Augmentation size */
5329 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5330 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5331 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5332 DW_CFA_nop, DW_CFA_nop,
5334 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5335 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5336 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5337 0, 0, 0, 0, /* .plt size goes here */
5338 0, /* Augmentation size */
5339 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5340 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5341 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5342 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5343 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5344 13, /* Block length */
5345 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5346 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5347 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5348 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5349 DW_CFA_nop, DW_CFA_nop
5352 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
5354 elf_i386_nacl_plt0_entry, /* plt0_entry */
5355 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5356 2, /* plt0_got1_offset */
5357 8, /* plt0_got2_offset */
5358 elf_i386_nacl_plt_entry, /* plt_entry */
5359 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5360 2, /* plt_got_offset */
5361 33, /* plt_reloc_offset */
5362 38, /* plt_plt_offset */
5363 32, /* plt_lazy_offset */
5364 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5365 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5366 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5367 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
5370 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5372 &elf_i386_nacl_plt, /* plt */
5373 0x90, /* plt0_pad_byte: nop insn */
5378 elf32_i386_nacl_elf_object_p (bfd *abfd)
5380 /* Set the right machine number for a NaCl i386 ELF32 file. */
5381 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
5385 #undef elf_backend_arch_data
5386 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5388 #undef elf_backend_object_p
5389 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5390 #undef elf_backend_modify_segment_map
5391 #define elf_backend_modify_segment_map nacl_modify_segment_map
5392 #undef elf_backend_modify_program_headers
5393 #define elf_backend_modify_program_headers nacl_modify_program_headers
5394 #undef elf_backend_final_write_processing
5395 #define elf_backend_final_write_processing nacl_final_write_processing
5397 #include "elf32-target.h"
5399 /* Restore defaults. */
5400 #undef elf_backend_object_p
5401 #undef elf_backend_modify_segment_map
5402 #undef elf_backend_modify_program_headers
5403 #undef elf_backend_final_write_processing
5405 /* VxWorks support. */
5407 #undef TARGET_LITTLE_SYM
5408 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5409 #undef TARGET_LITTLE_NAME
5410 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5412 #undef elf_backend_plt_alignment
5413 #define elf_backend_plt_alignment 4
5415 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5417 &elf_i386_plt, /* plt */
5418 0x90, /* plt0_pad_byte */
5422 #undef elf_backend_arch_data
5423 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5425 #undef elf_backend_relocs_compatible
5426 #undef elf_backend_add_symbol_hook
5427 #define elf_backend_add_symbol_hook \
5428 elf_vxworks_add_symbol_hook
5429 #undef elf_backend_link_output_symbol_hook
5430 #define elf_backend_link_output_symbol_hook \
5431 elf_vxworks_link_output_symbol_hook
5432 #undef elf_backend_emit_relocs
5433 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5434 #undef elf_backend_final_write_processing
5435 #define elf_backend_final_write_processing \
5436 elf_vxworks_final_write_processing
5437 #undef elf_backend_static_tls_alignment
5439 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5441 #undef elf_backend_want_plt_sym
5442 #define elf_backend_want_plt_sym 1
5445 #define elf32_bed elf32_i386_vxworks_bed
5447 #include "elf32-target.h"