1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2015 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
33 /* 386 uses REL relocations instead of RELA. */
38 static reloc_howto_type elf_howto_table[]=
40 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
41 bfd_elf_generic_reloc, "R_386_NONE",
42 TRUE, 0x00000000, 0x00000000, FALSE),
43 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
44 bfd_elf_generic_reloc, "R_386_32",
45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
47 bfd_elf_generic_reloc, "R_386_PC32",
48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
50 bfd_elf_generic_reloc, "R_386_GOT32",
51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
53 bfd_elf_generic_reloc, "R_386_PLT32",
54 TRUE, 0xffffffff, 0xffffffff, TRUE),
55 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_386_COPY",
57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_386_RELATIVE",
66 TRUE, 0xffffffff, 0xffffffff, FALSE),
67 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_386_GOTOFF",
69 TRUE, 0xffffffff, 0xffffffff, FALSE),
70 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_386_GOTPC",
72 TRUE, 0xffffffff, 0xffffffff, TRUE),
74 /* We have a gap in the reloc numbers here.
75 R_386_standard counts the number up to this point, and
76 R_386_ext_offset is the value to subtract from a reloc type of
77 R_386_16 thru R_386_PC8 to form an index into this table. */
78 #define R_386_standard (R_386_GOTPC + 1)
79 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
81 /* These relocs are a GNU extension. */
82 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_386_TLS_IE",
87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_386_TLS_LE",
93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_386_TLS_GD",
96 TRUE, 0xffffffff, 0xffffffff, FALSE),
97 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_386_TLS_LDM",
99 TRUE, 0xffffffff, 0xffffffff, FALSE),
100 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_386_16",
102 TRUE, 0xffff, 0xffff, FALSE),
103 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_386_PC16",
105 TRUE, 0xffff, 0xffff, TRUE),
106 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_386_8",
108 TRUE, 0xff, 0xff, FALSE),
109 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
110 bfd_elf_generic_reloc, "R_386_PC8",
111 TRUE, 0xff, 0xff, TRUE),
113 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
114 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
115 /* These are common with Solaris TLS implementation. */
116 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
127 TRUE, 0xffffffff, 0xffffffff, FALSE),
128 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
131 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
133 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
135 bfd_elf_generic_reloc, "R_386_SIZE32",
136 TRUE, 0xffffffff, 0xffffffff, FALSE),
137 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
140 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
143 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_TLS_DESC",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
146 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_386_IRELATIVE",
148 TRUE, 0xffffffff, 0xffffffff, FALSE),
151 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
152 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
154 /* GNU extension to record C++ vtable hierarchy. */
155 HOWTO (R_386_GNU_VTINHERIT, /* type */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
159 FALSE, /* pc_relative */
161 complain_overflow_dont, /* complain_on_overflow */
162 NULL, /* special_function */
163 "R_386_GNU_VTINHERIT", /* name */
164 FALSE, /* partial_inplace */
167 FALSE), /* pcrel_offset */
169 /* GNU extension to record C++ vtable member usage. */
170 HOWTO (R_386_GNU_VTENTRY, /* type */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
174 FALSE, /* pc_relative */
176 complain_overflow_dont, /* complain_on_overflow */
177 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
178 "R_386_GNU_VTENTRY", /* name */
179 FALSE, /* partial_inplace */
182 FALSE) /* pcrel_offset */
184 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
188 #ifdef DEBUG_GEN_RELOC
190 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
195 static reloc_howto_type *
196 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
197 bfd_reloc_code_real_type code)
202 TRACE ("BFD_RELOC_NONE");
203 return &elf_howto_table[R_386_NONE];
206 TRACE ("BFD_RELOC_32");
207 return &elf_howto_table[R_386_32];
210 TRACE ("BFD_RELOC_CTOR");
211 return &elf_howto_table[R_386_32];
213 case BFD_RELOC_32_PCREL:
214 TRACE ("BFD_RELOC_PC32");
215 return &elf_howto_table[R_386_PC32];
217 case BFD_RELOC_386_GOT32:
218 TRACE ("BFD_RELOC_386_GOT32");
219 return &elf_howto_table[R_386_GOT32];
221 case BFD_RELOC_386_PLT32:
222 TRACE ("BFD_RELOC_386_PLT32");
223 return &elf_howto_table[R_386_PLT32];
225 case BFD_RELOC_386_COPY:
226 TRACE ("BFD_RELOC_386_COPY");
227 return &elf_howto_table[R_386_COPY];
229 case BFD_RELOC_386_GLOB_DAT:
230 TRACE ("BFD_RELOC_386_GLOB_DAT");
231 return &elf_howto_table[R_386_GLOB_DAT];
233 case BFD_RELOC_386_JUMP_SLOT:
234 TRACE ("BFD_RELOC_386_JUMP_SLOT");
235 return &elf_howto_table[R_386_JUMP_SLOT];
237 case BFD_RELOC_386_RELATIVE:
238 TRACE ("BFD_RELOC_386_RELATIVE");
239 return &elf_howto_table[R_386_RELATIVE];
241 case BFD_RELOC_386_GOTOFF:
242 TRACE ("BFD_RELOC_386_GOTOFF");
243 return &elf_howto_table[R_386_GOTOFF];
245 case BFD_RELOC_386_GOTPC:
246 TRACE ("BFD_RELOC_386_GOTPC");
247 return &elf_howto_table[R_386_GOTPC];
249 /* These relocs are a GNU extension. */
250 case BFD_RELOC_386_TLS_TPOFF:
251 TRACE ("BFD_RELOC_386_TLS_TPOFF");
252 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
254 case BFD_RELOC_386_TLS_IE:
255 TRACE ("BFD_RELOC_386_TLS_IE");
256 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
258 case BFD_RELOC_386_TLS_GOTIE:
259 TRACE ("BFD_RELOC_386_TLS_GOTIE");
260 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
262 case BFD_RELOC_386_TLS_LE:
263 TRACE ("BFD_RELOC_386_TLS_LE");
264 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
266 case BFD_RELOC_386_TLS_GD:
267 TRACE ("BFD_RELOC_386_TLS_GD");
268 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
270 case BFD_RELOC_386_TLS_LDM:
271 TRACE ("BFD_RELOC_386_TLS_LDM");
272 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
275 TRACE ("BFD_RELOC_16");
276 return &elf_howto_table[R_386_16 - R_386_ext_offset];
278 case BFD_RELOC_16_PCREL:
279 TRACE ("BFD_RELOC_16_PCREL");
280 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
283 TRACE ("BFD_RELOC_8");
284 return &elf_howto_table[R_386_8 - R_386_ext_offset];
286 case BFD_RELOC_8_PCREL:
287 TRACE ("BFD_RELOC_8_PCREL");
288 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
290 /* Common with Sun TLS implementation. */
291 case BFD_RELOC_386_TLS_LDO_32:
292 TRACE ("BFD_RELOC_386_TLS_LDO_32");
293 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
295 case BFD_RELOC_386_TLS_IE_32:
296 TRACE ("BFD_RELOC_386_TLS_IE_32");
297 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
299 case BFD_RELOC_386_TLS_LE_32:
300 TRACE ("BFD_RELOC_386_TLS_LE_32");
301 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
303 case BFD_RELOC_386_TLS_DTPMOD32:
304 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
305 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
307 case BFD_RELOC_386_TLS_DTPOFF32:
308 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
309 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
311 case BFD_RELOC_386_TLS_TPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
313 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
315 case BFD_RELOC_SIZE32:
316 TRACE ("BFD_RELOC_SIZE32");
317 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
319 case BFD_RELOC_386_TLS_GOTDESC:
320 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
321 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
323 case BFD_RELOC_386_TLS_DESC_CALL:
324 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
325 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
327 case BFD_RELOC_386_TLS_DESC:
328 TRACE ("BFD_RELOC_386_TLS_DESC");
329 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
331 case BFD_RELOC_386_IRELATIVE:
332 TRACE ("BFD_RELOC_386_IRELATIVE");
333 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
335 case BFD_RELOC_VTABLE_INHERIT:
336 TRACE ("BFD_RELOC_VTABLE_INHERIT");
337 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
339 case BFD_RELOC_VTABLE_ENTRY:
340 TRACE ("BFD_RELOC_VTABLE_ENTRY");
341 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
351 static reloc_howto_type *
352 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
357 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
358 if (elf_howto_table[i].name != NULL
359 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
360 return &elf_howto_table[i];
365 static reloc_howto_type *
366 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
370 if ((indx = r_type) >= R_386_standard
371 && ((indx = r_type - R_386_ext_offset) - R_386_standard
372 >= R_386_ext - R_386_standard)
373 && ((indx = r_type - R_386_tls_offset) - R_386_ext
374 >= R_386_irelative - R_386_ext)
375 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
376 >= R_386_vt - R_386_irelative))
378 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
382 /* PR 17512: file: 0f67f69d. */
383 if (elf_howto_table [indx].type != r_type)
385 return &elf_howto_table[indx];
389 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
391 Elf_Internal_Rela *dst)
393 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
394 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
397 /* Return whether a symbol name implies a local label. The UnixWare
398 2.1 cc generates temporary symbols that start with .X, so we
399 recognize them here. FIXME: do other SVR4 compilers also use .X?.
400 If so, we should move the .X recognition into
401 _bfd_elf_is_local_label_name. */
404 elf_i386_is_local_label_name (bfd *abfd, const char *name)
406 if (name[0] == '.' && name[1] == 'X')
409 return _bfd_elf_is_local_label_name (abfd, name);
412 /* Support for core dump NOTE sections. */
415 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
420 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
422 int pr_version = bfd_get_32 (abfd, note->descdata);
428 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
431 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
435 size = bfd_get_32 (abfd, note->descdata + 8);
439 switch (note->descsz)
444 case 144: /* Linux/i386 */
446 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
449 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
459 /* Make a ".reg/999" section. */
460 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
461 size, note->descpos + offset);
465 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
467 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
469 int pr_version = bfd_get_32 (abfd, note->descdata);
474 elf_tdata (abfd)->core->program
475 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
476 elf_tdata (abfd)->core->command
477 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
481 switch (note->descsz)
486 case 124: /* Linux/i386 elf_prpsinfo. */
487 elf_tdata (abfd)->core->pid
488 = bfd_get_32 (abfd, note->descdata + 12);
489 elf_tdata (abfd)->core->program
490 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
491 elf_tdata (abfd)->core->command
492 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
496 /* Note that for some reason, a spurious space is tacked
497 onto the end of the args in some (at least one anyway)
498 implementations, so strip it off if it exists. */
500 char *command = elf_tdata (abfd)->core->command;
501 int n = strlen (command);
503 if (0 < n && command[n - 1] == ' ')
504 command[n - 1] = '\0';
510 /* Functions for the i386 ELF linker.
512 In order to gain some understanding of code in this file without
513 knowing all the intricate details of the linker, note the
516 Functions named elf_i386_* are called by external routines, other
517 functions are only called locally. elf_i386_* functions appear
518 in this file more or less in the order in which they are called
519 from external routines. eg. elf_i386_check_relocs is called
520 early in the link process, elf_i386_finish_dynamic_sections is
521 one of the last functions. */
524 /* The name of the dynamic interpreter. This is put in the .interp
527 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
529 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
533 #define ELIMINATE_COPY_RELOCS 1
535 /* The size in bytes of an entry in the procedure linkage table. */
537 #define PLT_ENTRY_SIZE 16
539 /* The first entry in an absolute procedure linkage table looks like
540 this. See the SVR4 ABI i386 supplement to see how this works.
541 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
543 static const bfd_byte elf_i386_plt0_entry[12] =
545 0xff, 0x35, /* pushl contents of address */
546 0, 0, 0, 0, /* replaced with address of .got + 4. */
547 0xff, 0x25, /* jmp indirect */
548 0, 0, 0, 0 /* replaced with address of .got + 8. */
551 /* Subsequent entries in an absolute procedure linkage table look like
554 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
558 0x68, /* pushl immediate */
559 0, 0, 0, 0, /* replaced with offset into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt. */
564 /* The first entry in a PIC procedure linkage table look like this.
565 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
567 static const bfd_byte elf_i386_pic_plt0_entry[12] =
569 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
570 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
573 /* Subsequent entries in a PIC procedure linkage table look like this. */
575 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
577 0xff, 0xa3, /* jmp *offset(%ebx) */
578 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
579 0x68, /* pushl immediate */
580 0, 0, 0, 0, /* replaced with offset into relocation table. */
581 0xe9, /* jmp relative */
582 0, 0, 0, 0 /* replaced with offset to start of .plt. */
585 /* Entries in the GOT procedure linkage table look like this. */
587 static const bfd_byte elf_i386_got_plt_entry[8] =
589 0xff, 0x25, /* jmp indirect */
590 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
591 0x66, 0x90 /* xchg %ax,%ax */
594 /* Entries in the PIC GOT procedure linkage table look like this. */
596 static const bfd_byte elf_i386_pic_got_plt_entry[8] =
598 0xff, 0xa3, /* jmp *offset(%ebx) */
599 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* .eh_frame covering the .plt section. */
605 static const bfd_byte elf_i386_eh_frame_plt[] =
607 #define PLT_CIE_LENGTH 20
608 #define PLT_FDE_LENGTH 36
609 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
610 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
611 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
612 0, 0, 0, 0, /* CIE ID */
614 'z', 'R', 0, /* Augmentation string */
615 1, /* Code alignment factor */
616 0x7c, /* Data alignment factor */
617 8, /* Return address column */
618 1, /* Augmentation size */
619 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
620 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
621 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
622 DW_CFA_nop, DW_CFA_nop,
624 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
625 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
626 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
627 0, 0, 0, 0, /* .plt size goes here */
628 0, /* Augmentation size */
629 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
630 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
631 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
632 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
633 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
634 11, /* Block length */
635 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
636 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
637 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
638 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
639 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
642 struct elf_i386_plt_layout
644 /* The first entry in an absolute procedure linkage table looks like this. */
645 const bfd_byte *plt0_entry;
646 unsigned int plt0_entry_size;
648 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
649 unsigned int plt0_got1_offset;
650 unsigned int plt0_got2_offset;
652 /* Later entries in an absolute procedure linkage table look like this. */
653 const bfd_byte *plt_entry;
654 unsigned int plt_entry_size;
656 /* Offsets into plt_entry that are to be replaced with... */
657 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
658 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
659 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
661 /* Offset into plt_entry where the initial value of the GOT entry points. */
662 unsigned int plt_lazy_offset;
664 /* The first entry in a PIC procedure linkage table looks like this. */
665 const bfd_byte *pic_plt0_entry;
667 /* Subsequent entries in a PIC procedure linkage table look like this. */
668 const bfd_byte *pic_plt_entry;
670 /* .eh_frame covering the .plt section. */
671 const bfd_byte *eh_frame_plt;
672 unsigned int eh_frame_plt_size;
675 #define GET_PLT_ENTRY_SIZE(abfd) \
676 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
678 /* These are the standard parameters. */
679 static const struct elf_i386_plt_layout elf_i386_plt =
681 elf_i386_plt0_entry, /* plt0_entry */
682 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
683 2, /* plt0_got1_offset */
684 8, /* plt0_got2_offset */
685 elf_i386_plt_entry, /* plt_entry */
686 PLT_ENTRY_SIZE, /* plt_entry_size */
687 2, /* plt_got_offset */
688 7, /* plt_reloc_offset */
689 12, /* plt_plt_offset */
690 6, /* plt_lazy_offset */
691 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
692 elf_i386_pic_plt_entry, /* pic_plt_entry */
693 elf_i386_eh_frame_plt, /* eh_frame_plt */
694 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
698 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
699 for the PLTResolve stub and then for each PLT entry. */
700 #define PLTRESOLVE_RELOCS_SHLIB 0
701 #define PLTRESOLVE_RELOCS 2
702 #define PLT_NON_JUMP_SLOT_RELOCS 2
704 /* Architecture-specific backend data for i386. */
706 struct elf_i386_backend_data
708 /* Parameters describing PLT generation. */
709 const struct elf_i386_plt_layout *plt;
711 /* Value used to fill the unused bytes of the first PLT entry. */
712 bfd_byte plt0_pad_byte;
714 /* True if the target system is VxWorks. */
718 #define get_elf_i386_backend_data(abfd) \
719 ((const struct elf_i386_backend_data *) \
720 get_elf_backend_data (abfd)->arch_data)
722 /* These are the standard parameters. */
723 static const struct elf_i386_backend_data elf_i386_arch_bed =
725 &elf_i386_plt, /* plt */
726 0, /* plt0_pad_byte */
730 #define elf_backend_arch_data &elf_i386_arch_bed
732 /* i386 ELF linker hash entry. */
734 struct elf_i386_link_hash_entry
736 struct elf_link_hash_entry elf;
738 /* Track dynamic relocs copied for this symbol. */
739 struct elf_dyn_relocs *dyn_relocs;
741 #define GOT_UNKNOWN 0
745 #define GOT_TLS_IE_POS 5
746 #define GOT_TLS_IE_NEG 6
747 #define GOT_TLS_IE_BOTH 7
748 #define GOT_TLS_GDESC 8
749 #define GOT_TLS_GD_BOTH_P(type) \
750 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
751 #define GOT_TLS_GD_P(type) \
752 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
753 #define GOT_TLS_GDESC_P(type) \
754 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
755 #define GOT_TLS_GD_ANY_P(type) \
756 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
757 unsigned char tls_type;
759 /* Symbol is referenced by R_386_GOTOFF relocation. */
760 unsigned int gotoff_ref : 1;
762 /* Information about the GOT PLT entry. Filled when there are both
763 GOT and PLT relocations against the same function. */
764 union gotplt_union plt_got;
766 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
767 starting at the end of the jump table. */
771 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
773 struct elf_i386_obj_tdata
775 struct elf_obj_tdata root;
777 /* tls_type for each local got entry. */
778 char *local_got_tls_type;
780 /* GOTPLT entries for TLS descriptors. */
781 bfd_vma *local_tlsdesc_gotent;
784 #define elf_i386_tdata(abfd) \
785 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
787 #define elf_i386_local_got_tls_type(abfd) \
788 (elf_i386_tdata (abfd)->local_got_tls_type)
790 #define elf_i386_local_tlsdesc_gotent(abfd) \
791 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
793 #define is_i386_elf(bfd) \
794 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
795 && elf_tdata (bfd) != NULL \
796 && elf_object_id (bfd) == I386_ELF_DATA)
799 elf_i386_mkobject (bfd *abfd)
801 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
805 /* i386 ELF linker hash table. */
807 struct elf_i386_link_hash_table
809 struct elf_link_hash_table elf;
811 /* Short-cuts to get to dynamic linker sections. */
814 asection *plt_eh_frame;
819 bfd_signed_vma refcount;
823 /* The amount of space used by the reserved portion of the sgotplt
824 section, plus whatever space is used by the jump slots. */
825 bfd_vma sgotplt_jump_table_size;
827 /* Small local sym cache. */
828 struct sym_cache sym_cache;
830 /* _TLS_MODULE_BASE_ symbol. */
831 struct bfd_link_hash_entry *tls_module_base;
833 /* Used by local STT_GNU_IFUNC symbols. */
834 htab_t loc_hash_table;
835 void * loc_hash_memory;
837 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
840 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
841 bfd_vma next_tls_desc_index;
843 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
844 bfd_vma next_jump_slot_index;
846 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
847 bfd_vma next_irelative_index;
850 /* Get the i386 ELF linker hash table from a link_info structure. */
852 #define elf_i386_hash_table(p) \
853 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
854 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
856 #define elf_i386_compute_jump_table_size(htab) \
857 ((htab)->elf.srelplt->reloc_count * 4)
859 /* Create an entry in an i386 ELF linker hash table. */
861 static struct bfd_hash_entry *
862 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
863 struct bfd_hash_table *table,
866 /* Allocate the structure if it has not already been allocated by a
870 entry = (struct bfd_hash_entry *)
871 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
876 /* Call the allocation method of the superclass. */
877 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
880 struct elf_i386_link_hash_entry *eh;
882 eh = (struct elf_i386_link_hash_entry *) entry;
883 eh->dyn_relocs = NULL;
884 eh->tls_type = GOT_UNKNOWN;
886 eh->plt_got.offset = (bfd_vma) -1;
887 eh->tlsdesc_got = (bfd_vma) -1;
893 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
894 for local symbol so that we can handle local STT_GNU_IFUNC symbols
895 as global symbol. We reuse indx and dynstr_index for local symbol
896 hash since they aren't used by global symbols in this backend. */
899 elf_i386_local_htab_hash (const void *ptr)
901 struct elf_link_hash_entry *h
902 = (struct elf_link_hash_entry *) ptr;
903 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
906 /* Compare local hash entries. */
909 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
911 struct elf_link_hash_entry *h1
912 = (struct elf_link_hash_entry *) ptr1;
913 struct elf_link_hash_entry *h2
914 = (struct elf_link_hash_entry *) ptr2;
916 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
919 /* Find and/or create a hash entry for local symbol. */
921 static struct elf_link_hash_entry *
922 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
923 bfd *abfd, const Elf_Internal_Rela *rel,
926 struct elf_i386_link_hash_entry e, *ret;
927 asection *sec = abfd->sections;
928 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
929 ELF32_R_SYM (rel->r_info));
932 e.elf.indx = sec->id;
933 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
934 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
935 create ? INSERT : NO_INSERT);
942 ret = (struct elf_i386_link_hash_entry *) *slot;
946 ret = (struct elf_i386_link_hash_entry *)
947 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
948 sizeof (struct elf_i386_link_hash_entry));
951 memset (ret, 0, sizeof (*ret));
952 ret->elf.indx = sec->id;
953 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
954 ret->elf.dynindx = -1;
955 ret->plt_got.offset = (bfd_vma) -1;
961 /* Destroy an i386 ELF linker hash table. */
964 elf_i386_link_hash_table_free (bfd *obfd)
966 struct elf_i386_link_hash_table *htab
967 = (struct elf_i386_link_hash_table *) obfd->link.hash;
969 if (htab->loc_hash_table)
970 htab_delete (htab->loc_hash_table);
971 if (htab->loc_hash_memory)
972 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
973 _bfd_elf_link_hash_table_free (obfd);
976 /* Create an i386 ELF linker hash table. */
978 static struct bfd_link_hash_table *
979 elf_i386_link_hash_table_create (bfd *abfd)
981 struct elf_i386_link_hash_table *ret;
982 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
984 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
988 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
989 elf_i386_link_hash_newfunc,
990 sizeof (struct elf_i386_link_hash_entry),
997 ret->loc_hash_table = htab_try_create (1024,
998 elf_i386_local_htab_hash,
999 elf_i386_local_htab_eq,
1001 ret->loc_hash_memory = objalloc_create ();
1002 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1004 elf_i386_link_hash_table_free (abfd);
1007 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1009 return &ret->elf.root;
1012 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1013 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1017 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1019 struct elf_i386_link_hash_table *htab;
1021 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1024 htab = elf_i386_hash_table (info);
1028 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1032 if (info->executable)
1034 /* Always allow copy relocs for building executables. */
1035 asection *s = bfd_get_linker_section (dynobj, ".rel.bss");
1038 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1039 s = bfd_make_section_anyway_with_flags (dynobj,
1041 (bed->dynamic_sec_flags
1044 || ! bfd_set_section_alignment (dynobj, s,
1045 bed->s->log_file_align))
1051 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1052 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1056 if (!info->no_ld_generated_unwind_info
1057 && htab->plt_eh_frame == NULL
1058 && htab->elf.splt != NULL)
1060 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1061 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1062 | SEC_LINKER_CREATED);
1064 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1065 if (htab->plt_eh_frame == NULL
1066 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1073 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1076 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1077 struct elf_link_hash_entry *dir,
1078 struct elf_link_hash_entry *ind)
1080 struct elf_i386_link_hash_entry *edir, *eind;
1082 edir = (struct elf_i386_link_hash_entry *) dir;
1083 eind = (struct elf_i386_link_hash_entry *) ind;
1085 if (eind->dyn_relocs != NULL)
1087 if (edir->dyn_relocs != NULL)
1089 struct elf_dyn_relocs **pp;
1090 struct elf_dyn_relocs *p;
1092 /* Add reloc counts against the indirect sym to the direct sym
1093 list. Merge any entries against the same section. */
1094 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1096 struct elf_dyn_relocs *q;
1098 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1099 if (q->sec == p->sec)
1101 q->pc_count += p->pc_count;
1102 q->count += p->count;
1109 *pp = edir->dyn_relocs;
1112 edir->dyn_relocs = eind->dyn_relocs;
1113 eind->dyn_relocs = NULL;
1116 if (ind->root.type == bfd_link_hash_indirect
1117 && dir->got.refcount <= 0)
1119 edir->tls_type = eind->tls_type;
1120 eind->tls_type = GOT_UNKNOWN;
1123 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1124 generate a R_386_COPY reloc. */
1125 edir->gotoff_ref |= eind->gotoff_ref;
1127 if (ELIMINATE_COPY_RELOCS
1128 && ind->root.type != bfd_link_hash_indirect
1129 && dir->dynamic_adjusted)
1131 /* If called to transfer flags for a weakdef during processing
1132 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1133 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1134 dir->ref_dynamic |= ind->ref_dynamic;
1135 dir->ref_regular |= ind->ref_regular;
1136 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1137 dir->needs_plt |= ind->needs_plt;
1138 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1141 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1144 /* Return TRUE if the TLS access code sequence support transition
1148 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1150 Elf_Internal_Shdr *symtab_hdr,
1151 struct elf_link_hash_entry **sym_hashes,
1152 unsigned int r_type,
1153 const Elf_Internal_Rela *rel,
1154 const Elf_Internal_Rela *relend)
1156 unsigned int val, type;
1157 unsigned long r_symndx;
1158 struct elf_link_hash_entry *h;
1161 /* Get the section contents. */
1162 if (contents == NULL)
1164 if (elf_section_data (sec)->this_hdr.contents != NULL)
1165 contents = elf_section_data (sec)->this_hdr.contents;
1168 /* FIXME: How to better handle error condition? */
1169 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1172 /* Cache the section contents for elf_link_input_bfd. */
1173 elf_section_data (sec)->this_hdr.contents = contents;
1177 offset = rel->r_offset;
1182 if (offset < 2 || (rel + 1) >= relend)
1185 type = bfd_get_8 (abfd, contents + offset - 2);
1186 if (r_type == R_386_TLS_GD)
1188 /* Check transition from GD access model. Only
1189 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1190 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1191 can transit to different access model. */
1192 if ((offset + 10) > sec->size ||
1193 (type != 0x8d && type != 0x04))
1196 val = bfd_get_8 (abfd, contents + offset - 1);
1199 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1203 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1206 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1211 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1212 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1215 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1221 /* Check transition from LD access model. Only
1222 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1223 can transit to different access model. */
1224 if (type != 0x8d || (offset + 9) > sec->size)
1227 val = bfd_get_8 (abfd, contents + offset - 1);
1228 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1232 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1235 r_symndx = ELF32_R_SYM (rel[1].r_info);
1236 if (r_symndx < symtab_hdr->sh_info)
1239 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1240 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1241 may be versioned. */
1243 && h->root.root.string != NULL
1244 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1245 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1246 && (strncmp (h->root.root.string, "___tls_get_addr",
1250 /* Check transition from IE access model:
1251 movl foo@indntpoff(%rip), %eax
1252 movl foo@indntpoff(%rip), %reg
1253 addl foo@indntpoff(%rip), %reg
1256 if (offset < 1 || (offset + 4) > sec->size)
1259 /* Check "movl foo@tpoff(%rip), %eax" first. */
1260 val = bfd_get_8 (abfd, contents + offset - 1);
1267 /* Check movl|addl foo@tpoff(%rip), %reg. */
1268 type = bfd_get_8 (abfd, contents + offset - 2);
1269 return ((type == 0x8b || type == 0x03)
1270 && (val & 0xc7) == 0x05);
1272 case R_386_TLS_GOTIE:
1273 case R_386_TLS_IE_32:
1274 /* Check transition from {IE_32,GOTIE} access model:
1275 subl foo@{tpoff,gontoff}(%reg1), %reg2
1276 movl foo@{tpoff,gontoff}(%reg1), %reg2
1277 addl foo@{tpoff,gontoff}(%reg1), %reg2
1280 if (offset < 2 || (offset + 4) > sec->size)
1283 val = bfd_get_8 (abfd, contents + offset - 1);
1284 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1287 type = bfd_get_8 (abfd, contents + offset - 2);
1288 return type == 0x8b || type == 0x2b || type == 0x03;
1290 case R_386_TLS_GOTDESC:
1291 /* Check transition from GDesc access model:
1292 leal x@tlsdesc(%ebx), %eax
1294 Make sure it's a leal adding ebx to a 32-bit offset
1295 into any register, although it's probably almost always
1298 if (offset < 2 || (offset + 4) > sec->size)
1301 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1304 val = bfd_get_8 (abfd, contents + offset - 1);
1305 return (val & 0xc7) == 0x83;
1307 case R_386_TLS_DESC_CALL:
1308 /* Check transition from GDesc access model:
1309 call *x@tlsdesc(%rax)
1311 if (offset + 2 <= sec->size)
1313 /* Make sure that it's a call *x@tlsdesc(%rax). */
1314 static const unsigned char call[] = { 0xff, 0x10 };
1315 return memcmp (contents + offset, call, 2) == 0;
1325 /* Return TRUE if the TLS access transition is OK or no transition
1326 will be performed. Update R_TYPE if there is a transition. */
1329 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1330 asection *sec, bfd_byte *contents,
1331 Elf_Internal_Shdr *symtab_hdr,
1332 struct elf_link_hash_entry **sym_hashes,
1333 unsigned int *r_type, int tls_type,
1334 const Elf_Internal_Rela *rel,
1335 const Elf_Internal_Rela *relend,
1336 struct elf_link_hash_entry *h,
1337 unsigned long r_symndx)
1339 unsigned int from_type = *r_type;
1340 unsigned int to_type = from_type;
1341 bfd_boolean check = TRUE;
1343 /* Skip TLS transition for functions. */
1345 && (h->type == STT_FUNC
1346 || h->type == STT_GNU_IFUNC))
1352 case R_386_TLS_GOTDESC:
1353 case R_386_TLS_DESC_CALL:
1354 case R_386_TLS_IE_32:
1356 case R_386_TLS_GOTIE:
1357 if (info->executable)
1360 to_type = R_386_TLS_LE_32;
1361 else if (from_type != R_386_TLS_IE
1362 && from_type != R_386_TLS_GOTIE)
1363 to_type = R_386_TLS_IE_32;
1366 /* When we are called from elf_i386_relocate_section, CONTENTS
1367 isn't NULL and there may be additional transitions based on
1369 if (contents != NULL)
1371 unsigned int new_to_type = to_type;
1373 if (info->executable
1376 && (tls_type & GOT_TLS_IE))
1377 new_to_type = R_386_TLS_LE_32;
1379 if (to_type == R_386_TLS_GD
1380 || to_type == R_386_TLS_GOTDESC
1381 || to_type == R_386_TLS_DESC_CALL)
1383 if (tls_type == GOT_TLS_IE_POS)
1384 new_to_type = R_386_TLS_GOTIE;
1385 else if (tls_type & GOT_TLS_IE)
1386 new_to_type = R_386_TLS_IE_32;
1389 /* We checked the transition before when we were called from
1390 elf_i386_check_relocs. We only want to check the new
1391 transition which hasn't been checked before. */
1392 check = new_to_type != to_type && from_type == to_type;
1393 to_type = new_to_type;
1399 if (info->executable)
1400 to_type = R_386_TLS_LE_32;
1407 /* Return TRUE if there is no transition. */
1408 if (from_type == to_type)
1411 /* Check if the transition can be performed. */
1413 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1414 symtab_hdr, sym_hashes,
1415 from_type, rel, relend))
1417 reloc_howto_type *from, *to;
1420 from = elf_i386_rtype_to_howto (abfd, from_type);
1421 to = elf_i386_rtype_to_howto (abfd, to_type);
1424 name = h->root.root.string;
1427 struct elf_i386_link_hash_table *htab;
1429 htab = elf_i386_hash_table (info);
1434 Elf_Internal_Sym *isym;
1436 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1438 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1442 (*_bfd_error_handler)
1443 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1444 "in section `%A' failed"),
1445 abfd, sec, from->name, to->name, name,
1446 (unsigned long) rel->r_offset);
1447 bfd_set_error (bfd_error_bad_value);
1455 /* Rename some of the generic section flags to better document how they
1457 #define need_convert_mov_to_lea sec_flg0
1459 /* Look through the relocs for a section during the first phase, and
1460 calculate needed space in the global offset table, procedure linkage
1461 table, and dynamic reloc sections. */
1464 elf_i386_check_relocs (bfd *abfd,
1465 struct bfd_link_info *info,
1467 const Elf_Internal_Rela *relocs)
1469 struct elf_i386_link_hash_table *htab;
1470 Elf_Internal_Shdr *symtab_hdr;
1471 struct elf_link_hash_entry **sym_hashes;
1472 const Elf_Internal_Rela *rel;
1473 const Elf_Internal_Rela *rel_end;
1475 bfd_boolean use_plt_got;
1477 if (info->relocatable)
1480 BFD_ASSERT (is_i386_elf (abfd));
1482 htab = elf_i386_hash_table (info);
1486 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1487 && (get_elf_i386_backend_data (abfd)
1488 == &elf_i386_arch_bed));
1490 symtab_hdr = &elf_symtab_hdr (abfd);
1491 sym_hashes = elf_sym_hashes (abfd);
1495 rel_end = relocs + sec->reloc_count;
1496 for (rel = relocs; rel < rel_end; rel++)
1498 unsigned int r_type;
1499 unsigned long r_symndx;
1500 struct elf_link_hash_entry *h;
1501 struct elf_i386_link_hash_entry *eh;
1502 Elf_Internal_Sym *isym;
1504 bfd_boolean size_reloc;
1506 r_symndx = ELF32_R_SYM (rel->r_info);
1507 r_type = ELF32_R_TYPE (rel->r_info);
1509 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1511 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1517 if (r_symndx < symtab_hdr->sh_info)
1519 /* A local symbol. */
1520 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1525 /* Check relocation against local STT_GNU_IFUNC symbol. */
1526 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1528 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1532 /* Fake a STT_GNU_IFUNC symbol. */
1533 h->type = STT_GNU_IFUNC;
1536 h->forced_local = 1;
1537 h->root.type = bfd_link_hash_defined;
1545 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1546 while (h->root.type == bfd_link_hash_indirect
1547 || h->root.type == bfd_link_hash_warning)
1548 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1551 eh = (struct elf_i386_link_hash_entry *) h;
1554 /* Create the ifunc sections for static executables. If we
1555 never see an indirect function symbol nor we are building
1556 a static executable, those sections will be empty and
1557 won't appear in output. */
1569 if (htab->elf.dynobj == NULL)
1570 htab->elf.dynobj = abfd;
1571 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1576 /* It is referenced by a non-shared object. */
1578 h->root.non_ir_ref = 1;
1581 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1582 symtab_hdr, sym_hashes,
1583 &r_type, GOT_UNKNOWN,
1584 rel, rel_end, h, r_symndx))
1590 htab->tls_ldm_got.refcount += 1;
1594 /* This symbol requires a procedure linkage table entry. We
1595 actually build the entry in adjust_dynamic_symbol,
1596 because this might be a case of linking PIC code which is
1597 never referenced by a dynamic object, in which case we
1598 don't need to generate a procedure linkage table entry
1601 /* If this is a local symbol, we resolve it directly without
1602 creating a procedure linkage table entry. */
1607 h->plt.refcount += 1;
1614 case R_386_TLS_IE_32:
1616 case R_386_TLS_GOTIE:
1617 if (!info->executable)
1618 info->flags |= DF_STATIC_TLS;
1623 case R_386_TLS_GOTDESC:
1624 case R_386_TLS_DESC_CALL:
1625 /* This symbol requires a global offset table entry. */
1627 int tls_type, old_tls_type;
1632 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1633 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1634 case R_386_TLS_GOTDESC:
1635 case R_386_TLS_DESC_CALL:
1636 tls_type = GOT_TLS_GDESC; break;
1637 case R_386_TLS_IE_32:
1638 if (ELF32_R_TYPE (rel->r_info) == r_type)
1639 tls_type = GOT_TLS_IE_NEG;
1641 /* If this is a GD->IE transition, we may use either of
1642 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1643 tls_type = GOT_TLS_IE;
1646 case R_386_TLS_GOTIE:
1647 tls_type = GOT_TLS_IE_POS; break;
1652 h->got.refcount += 1;
1653 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1657 bfd_signed_vma *local_got_refcounts;
1659 /* This is a global offset table entry for a local symbol. */
1660 local_got_refcounts = elf_local_got_refcounts (abfd);
1661 if (local_got_refcounts == NULL)
1665 size = symtab_hdr->sh_info;
1666 size *= (sizeof (bfd_signed_vma)
1667 + sizeof (bfd_vma) + sizeof(char));
1668 local_got_refcounts = (bfd_signed_vma *)
1669 bfd_zalloc (abfd, size);
1670 if (local_got_refcounts == NULL)
1672 elf_local_got_refcounts (abfd) = local_got_refcounts;
1673 elf_i386_local_tlsdesc_gotent (abfd)
1674 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1675 elf_i386_local_got_tls_type (abfd)
1676 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1678 local_got_refcounts[r_symndx] += 1;
1679 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1682 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1683 tls_type |= old_tls_type;
1684 /* If a TLS symbol is accessed using IE at least once,
1685 there is no point to use dynamic model for it. */
1686 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1687 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1688 || (tls_type & GOT_TLS_IE) == 0))
1690 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1691 tls_type = old_tls_type;
1692 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1693 && GOT_TLS_GD_ANY_P (tls_type))
1694 tls_type |= old_tls_type;
1698 name = h->root.root.string;
1700 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1702 (*_bfd_error_handler)
1703 (_("%B: `%s' accessed both as normal and "
1704 "thread local symbol"),
1706 bfd_set_error (bfd_error_bad_value);
1711 if (old_tls_type != tls_type)
1714 elf_i386_hash_entry (h)->tls_type = tls_type;
1716 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1724 if (htab->elf.sgot == NULL)
1726 if (htab->elf.dynobj == NULL)
1727 htab->elf.dynobj = abfd;
1728 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1731 if (r_type != R_386_TLS_IE)
1735 case R_386_TLS_LE_32:
1737 if (info->executable)
1739 info->flags |= DF_STATIC_TLS;
1744 if (h != NULL && info->executable)
1746 /* If this reloc is in a read-only section, we might
1747 need a copy reloc. We can't check reliably at this
1748 stage whether the section is read-only, as input
1749 sections have not yet been mapped to output sections.
1750 Tentatively set the flag for now, and correct in
1751 adjust_dynamic_symbol. */
1754 /* We may need a .plt entry if the function this reloc
1755 refers to is in a shared lib. */
1756 h->plt.refcount += 1;
1757 if (r_type != R_386_PC32)
1758 h->pointer_equality_needed = 1;
1763 /* If we are creating a shared library, and this is a reloc
1764 against a global symbol, or a non PC relative reloc
1765 against a local symbol, then we need to copy the reloc
1766 into the shared library. However, if we are linking with
1767 -Bsymbolic, we do not need to copy a reloc against a
1768 global symbol which is defined in an object we are
1769 including in the link (i.e., DEF_REGULAR is set). At
1770 this point we have not seen all the input files, so it is
1771 possible that DEF_REGULAR is not set now but will be set
1772 later (it is never cleared). In case of a weak definition,
1773 DEF_REGULAR may be cleared later by a strong definition in
1774 a shared library. We account for that possibility below by
1775 storing information in the relocs_copied field of the hash
1776 table entry. A similar situation occurs when creating
1777 shared libraries and symbol visibility changes render the
1780 If on the other hand, we are creating an executable, we
1781 may need to keep relocations for symbols satisfied by a
1782 dynamic library if we manage to avoid copy relocs for the
1785 && (sec->flags & SEC_ALLOC) != 0
1786 && (r_type != R_386_PC32
1788 && (! SYMBOLIC_BIND (info, h)
1789 || h->root.type == bfd_link_hash_defweak
1790 || !h->def_regular))))
1791 || (ELIMINATE_COPY_RELOCS
1793 && (sec->flags & SEC_ALLOC) != 0
1795 && (h->root.type == bfd_link_hash_defweak
1796 || !h->def_regular)))
1798 struct elf_dyn_relocs *p;
1799 struct elf_dyn_relocs **head;
1801 /* We must copy these reloc types into the output file.
1802 Create a reloc section in dynobj and make room for
1806 if (htab->elf.dynobj == NULL)
1807 htab->elf.dynobj = abfd;
1809 sreloc = _bfd_elf_make_dynamic_reloc_section
1810 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1816 /* If this is a global symbol, we count the number of
1817 relocations we need for this symbol. */
1820 head = &eh->dyn_relocs;
1824 /* Track dynamic relocs needed for local syms too.
1825 We really need local syms available to do this
1830 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1835 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1839 vpp = &elf_section_data (s)->local_dynrel;
1840 head = (struct elf_dyn_relocs **)vpp;
1844 if (p == NULL || p->sec != sec)
1846 bfd_size_type amt = sizeof *p;
1847 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1859 /* Count size relocation as PC-relative relocation. */
1860 if (r_type == R_386_PC32 || size_reloc)
1865 /* This relocation describes the C++ object vtable hierarchy.
1866 Reconstruct it for later use during GC. */
1867 case R_386_GNU_VTINHERIT:
1868 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1872 /* This relocation describes which C++ vtable entries are actually
1873 used. Record for later use during GC. */
1874 case R_386_GNU_VTENTRY:
1875 BFD_ASSERT (h != NULL);
1877 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1887 && h->plt.refcount > 0
1888 && h->got.refcount > 0
1889 && htab->plt_got == NULL)
1891 /* Create the GOT procedure linkage table. */
1892 unsigned int plt_got_align;
1893 const struct elf_backend_data *bed;
1895 bed = get_elf_backend_data (info->output_bfd);
1896 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
1897 && (sizeof (elf_i386_got_plt_entry)
1898 == sizeof (elf_i386_pic_got_plt_entry)));
1901 if (htab->elf.dynobj == NULL)
1902 htab->elf.dynobj = abfd;
1904 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1906 (bed->dynamic_sec_flags
1911 if (htab->plt_got == NULL
1912 || !bfd_set_section_alignment (htab->elf.dynobj,
1918 if (r_type == R_386_GOT32
1919 && (h == NULL || h->type != STT_GNU_IFUNC))
1920 sec->need_convert_mov_to_lea = 1;
1926 /* Return the section that should be marked against GC for a given
1930 elf_i386_gc_mark_hook (asection *sec,
1931 struct bfd_link_info *info,
1932 Elf_Internal_Rela *rel,
1933 struct elf_link_hash_entry *h,
1934 Elf_Internal_Sym *sym)
1937 switch (ELF32_R_TYPE (rel->r_info))
1939 case R_386_GNU_VTINHERIT:
1940 case R_386_GNU_VTENTRY:
1944 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1947 /* Update the got entry reference counts for the section being removed. */
1950 elf_i386_gc_sweep_hook (bfd *abfd,
1951 struct bfd_link_info *info,
1953 const Elf_Internal_Rela *relocs)
1955 struct elf_i386_link_hash_table *htab;
1956 Elf_Internal_Shdr *symtab_hdr;
1957 struct elf_link_hash_entry **sym_hashes;
1958 bfd_signed_vma *local_got_refcounts;
1959 const Elf_Internal_Rela *rel, *relend;
1961 if (info->relocatable)
1964 htab = elf_i386_hash_table (info);
1968 elf_section_data (sec)->local_dynrel = NULL;
1970 symtab_hdr = &elf_symtab_hdr (abfd);
1971 sym_hashes = elf_sym_hashes (abfd);
1972 local_got_refcounts = elf_local_got_refcounts (abfd);
1974 relend = relocs + sec->reloc_count;
1975 for (rel = relocs; rel < relend; rel++)
1977 unsigned long r_symndx;
1978 unsigned int r_type;
1979 struct elf_link_hash_entry *h = NULL;
1981 r_symndx = ELF32_R_SYM (rel->r_info);
1982 if (r_symndx >= symtab_hdr->sh_info)
1984 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1985 while (h->root.type == bfd_link_hash_indirect
1986 || h->root.type == bfd_link_hash_warning)
1987 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1991 /* A local symbol. */
1992 Elf_Internal_Sym *isym;
1994 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1997 /* Check relocation against local STT_GNU_IFUNC symbol. */
1999 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2001 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
2009 struct elf_i386_link_hash_entry *eh;
2010 struct elf_dyn_relocs **pp;
2011 struct elf_dyn_relocs *p;
2013 eh = (struct elf_i386_link_hash_entry *) h;
2014 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2017 /* Everything must go for SEC. */
2023 r_type = ELF32_R_TYPE (rel->r_info);
2024 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
2025 symtab_hdr, sym_hashes,
2026 &r_type, GOT_UNKNOWN,
2027 rel, relend, h, r_symndx))
2033 if (htab->tls_ldm_got.refcount > 0)
2034 htab->tls_ldm_got.refcount -= 1;
2038 case R_386_TLS_GOTDESC:
2039 case R_386_TLS_DESC_CALL:
2040 case R_386_TLS_IE_32:
2042 case R_386_TLS_GOTIE:
2046 if (h->got.refcount > 0)
2047 h->got.refcount -= 1;
2048 if (h->type == STT_GNU_IFUNC)
2050 if (h->plt.refcount > 0)
2051 h->plt.refcount -= 1;
2054 else if (local_got_refcounts != NULL)
2056 if (local_got_refcounts[r_symndx] > 0)
2057 local_got_refcounts[r_symndx] -= 1;
2065 && (h == NULL || h->type != STT_GNU_IFUNC))
2072 if (h->plt.refcount > 0)
2073 h->plt.refcount -= 1;
2078 if (h != NULL && h->type == STT_GNU_IFUNC)
2080 if (h->got.refcount > 0)
2081 h->got.refcount -= 1;
2082 if (h->plt.refcount > 0)
2083 h->plt.refcount -= 1;
2095 /* Adjust a symbol defined by a dynamic object and referenced by a
2096 regular object. The current definition is in some section of the
2097 dynamic object, but we're not including those sections. We have to
2098 change the definition to something the rest of the link can
2102 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2103 struct elf_link_hash_entry *h)
2105 struct elf_i386_link_hash_table *htab;
2107 struct elf_i386_link_hash_entry *eh;
2108 struct elf_dyn_relocs *p;
2110 /* STT_GNU_IFUNC symbol must go through PLT. */
2111 if (h->type == STT_GNU_IFUNC)
2113 /* All local STT_GNU_IFUNC references must be treate as local
2114 calls via local PLT. */
2116 && SYMBOL_CALLS_LOCAL (info, h))
2118 bfd_size_type pc_count = 0, count = 0;
2119 struct elf_dyn_relocs **pp;
2121 eh = (struct elf_i386_link_hash_entry *) h;
2122 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2124 pc_count += p->pc_count;
2125 p->count -= p->pc_count;
2134 if (pc_count || count)
2138 if (h->plt.refcount <= 0)
2139 h->plt.refcount = 1;
2141 h->plt.refcount += 1;
2145 if (h->plt.refcount <= 0)
2147 h->plt.offset = (bfd_vma) -1;
2153 /* If this is a function, put it in the procedure linkage table. We
2154 will fill in the contents of the procedure linkage table later,
2155 when we know the address of the .got section. */
2156 if (h->type == STT_FUNC
2159 if (h->plt.refcount <= 0
2160 || SYMBOL_CALLS_LOCAL (info, h)
2161 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2162 && h->root.type == bfd_link_hash_undefweak))
2164 /* This case can occur if we saw a PLT32 reloc in an input
2165 file, but the symbol was never referred to by a dynamic
2166 object, or if all references were garbage collected. In
2167 such a case, we don't actually need to build a procedure
2168 linkage table, and we can just do a PC32 reloc instead. */
2169 h->plt.offset = (bfd_vma) -1;
2176 /* It's possible that we incorrectly decided a .plt reloc was
2177 needed for an R_386_PC32 reloc to a non-function sym in
2178 check_relocs. We can't decide accurately between function and
2179 non-function syms in check-relocs; Objects loaded later in
2180 the link may change h->type. So fix it now. */
2181 h->plt.offset = (bfd_vma) -1;
2183 /* If this is a weak symbol, and there is a real definition, the
2184 processor independent code will have arranged for us to see the
2185 real definition first, and we can just use the same value. */
2186 if (h->u.weakdef != NULL)
2188 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2189 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2190 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2191 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2192 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2193 h->non_got_ref = h->u.weakdef->non_got_ref;
2197 /* This is a reference to a symbol defined by a dynamic object which
2198 is not a function. */
2200 /* If we are creating a shared library, we must presume that the
2201 only references to the symbol are via the global offset table.
2202 For such cases we need not do anything here; the relocations will
2203 be handled correctly by relocate_section. */
2204 if (!info->executable)
2207 /* If there are no references to this symbol that do not use the
2208 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2210 eh = (struct elf_i386_link_hash_entry *) h;
2211 if (!h->non_got_ref && !eh->gotoff_ref)
2214 /* If -z nocopyreloc was given, we won't generate them either. */
2215 if (info->nocopyreloc)
2221 htab = elf_i386_hash_table (info);
2225 /* If there aren't any dynamic relocs in read-only sections nor
2226 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2227 avoid the copy reloc. This doesn't work on VxWorks, where we can
2228 not have dynamic relocations (other than copy and jump slot
2229 relocations) in an executable. */
2230 if (ELIMINATE_COPY_RELOCS
2232 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2234 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2236 s = p->sec->output_section;
2237 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2248 /* We must allocate the symbol in our .dynbss section, which will
2249 become part of the .bss section of the executable. There will be
2250 an entry for this symbol in the .dynsym section. The dynamic
2251 object will contain position independent code, so all references
2252 from the dynamic object to this symbol will go through the global
2253 offset table. The dynamic linker will use the .dynsym entry to
2254 determine the address it must put in the global offset table, so
2255 both the dynamic object and the regular object will refer to the
2256 same memory location for the variable. */
2258 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2259 copy the initial value out of the dynamic object and into the
2260 runtime process image. */
2261 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2263 htab->srelbss->size += sizeof (Elf32_External_Rel);
2269 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2272 /* Allocate space in .plt, .got and associated reloc sections for
2276 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2278 struct bfd_link_info *info;
2279 struct elf_i386_link_hash_table *htab;
2280 struct elf_i386_link_hash_entry *eh;
2281 struct elf_dyn_relocs *p;
2282 unsigned plt_entry_size;
2284 if (h->root.type == bfd_link_hash_indirect)
2287 eh = (struct elf_i386_link_hash_entry *) h;
2289 info = (struct bfd_link_info *) inf;
2290 htab = elf_i386_hash_table (info);
2294 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2296 /* We can't use the GOT PLT if pointer equality is needed since
2297 finish_dynamic_symbol won't clear symbol value and the dynamic
2298 linker won't update the GOT slot. We will get into an infinite
2299 loop at run-time. */
2300 if (htab->plt_got != NULL
2301 && h->type != STT_GNU_IFUNC
2302 && !h->pointer_equality_needed
2303 && h->plt.refcount > 0
2304 && h->got.refcount > 0)
2306 /* Don't use the regular PLT if there are both GOT and GOTPLT
2308 h->plt.offset = (bfd_vma) -1;
2310 /* Use the GOT PLT. */
2311 eh->plt_got.refcount = 1;
2314 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2315 here if it is defined and referenced in a non-shared object. */
2316 if (h->type == STT_GNU_IFUNC
2318 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2321 else if (htab->elf.dynamic_sections_created
2322 && (h->plt.refcount > 0 || eh->plt_got.refcount > 0))
2324 bfd_boolean use_plt_got = eh->plt_got.refcount > 0;
2326 /* Make sure this symbol is output as a dynamic symbol.
2327 Undefined weak syms won't yet be marked as dynamic. */
2328 if (h->dynindx == -1
2329 && !h->forced_local)
2331 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2336 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2338 asection *s = htab->elf.splt;
2339 asection *got_s = htab->plt_got;
2341 /* If this is the first .plt entry, make room for the special
2344 s->size = plt_entry_size;
2347 eh->plt_got.offset = got_s->size;
2349 h->plt.offset = s->size;
2351 /* If this symbol is not defined in a regular file, and we are
2352 not generating a shared library, then set the symbol to this
2353 location in the .plt. This is required to make function
2354 pointers compare as equal between the normal executable and
2355 the shared library. */
2361 /* We need to make a call to the entry of the GOT PLT
2362 instead of regular PLT entry. */
2363 h->root.u.def.section = got_s;
2364 h->root.u.def.value = eh->plt_got.offset;
2368 h->root.u.def.section = s;
2369 h->root.u.def.value = h->plt.offset;
2373 /* Make room for this entry. */
2375 got_s->size += sizeof (elf_i386_got_plt_entry);
2378 s->size += plt_entry_size;
2380 /* We also need to make an entry in the .got.plt section,
2381 which will be placed in the .got section by the linker
2383 htab->elf.sgotplt->size += 4;
2385 /* We also need to make an entry in the .rel.plt section. */
2386 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2387 htab->elf.srelplt->reloc_count++;
2390 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2393 /* VxWorks has a second set of relocations for each PLT entry
2394 in executables. They go in a separate relocation section,
2395 which is processed by the kernel loader. */
2397 /* There are two relocations for the initial PLT entry: an
2398 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2399 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2401 if (h->plt.offset == plt_entry_size)
2402 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2404 /* There are two extra relocations for each subsequent PLT entry:
2405 an R_386_32 relocation for the GOT entry, and an R_386_32
2406 relocation for the PLT entry. */
2408 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2413 h->plt.offset = (bfd_vma) -1;
2419 h->plt.offset = (bfd_vma) -1;
2423 eh->tlsdesc_got = (bfd_vma) -1;
2425 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2426 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2427 if (h->got.refcount > 0
2430 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2431 h->got.offset = (bfd_vma) -1;
2432 else if (h->got.refcount > 0)
2436 int tls_type = elf_i386_hash_entry(h)->tls_type;
2438 /* Make sure this symbol is output as a dynamic symbol.
2439 Undefined weak syms won't yet be marked as dynamic. */
2440 if (h->dynindx == -1
2441 && !h->forced_local)
2443 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2448 if (GOT_TLS_GDESC_P (tls_type))
2450 eh->tlsdesc_got = htab->elf.sgotplt->size
2451 - elf_i386_compute_jump_table_size (htab);
2452 htab->elf.sgotplt->size += 8;
2453 h->got.offset = (bfd_vma) -2;
2455 if (! GOT_TLS_GDESC_P (tls_type)
2456 || GOT_TLS_GD_P (tls_type))
2458 h->got.offset = s->size;
2460 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2461 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2464 dyn = htab->elf.dynamic_sections_created;
2465 /* R_386_TLS_IE_32 needs one dynamic relocation,
2466 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2467 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2468 need two), R_386_TLS_GD needs one if local symbol and two if
2470 if (tls_type == GOT_TLS_IE_BOTH)
2471 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2472 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2473 || (tls_type & GOT_TLS_IE))
2474 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2475 else if (GOT_TLS_GD_P (tls_type))
2476 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2477 else if (! GOT_TLS_GDESC_P (tls_type)
2478 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2479 || h->root.type != bfd_link_hash_undefweak)
2481 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2482 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2483 if (GOT_TLS_GDESC_P (tls_type))
2484 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2487 h->got.offset = (bfd_vma) -1;
2489 if (eh->dyn_relocs == NULL)
2492 /* In the shared -Bsymbolic case, discard space allocated for
2493 dynamic pc-relative relocs against symbols which turn out to be
2494 defined in regular objects. For the normal shared case, discard
2495 space for pc-relative relocs that have become local due to symbol
2496 visibility changes. */
2500 /* The only reloc that uses pc_count is R_386_PC32, which will
2501 appear on a call or on something like ".long foo - .". We
2502 want calls to protected symbols to resolve directly to the
2503 function rather than going via the plt. If people want
2504 function pointer comparisons to work as expected then they
2505 should avoid writing assembly like ".long foo - .". */
2506 if (SYMBOL_CALLS_LOCAL (info, h))
2508 struct elf_dyn_relocs **pp;
2510 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2512 p->count -= p->pc_count;
2521 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2523 struct elf_dyn_relocs **pp;
2524 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2526 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2533 /* Also discard relocs on undefined weak syms with non-default
2535 if (eh->dyn_relocs != NULL
2536 && h->root.type == bfd_link_hash_undefweak)
2538 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2539 eh->dyn_relocs = NULL;
2541 /* Make sure undefined weak symbols are output as a dynamic
2543 else if (h->dynindx == -1
2544 && !h->forced_local)
2546 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2551 else if (ELIMINATE_COPY_RELOCS)
2553 /* For the non-shared case, discard space for relocs against
2554 symbols which turn out to need copy relocs or are not
2560 || (htab->elf.dynamic_sections_created
2561 && (h->root.type == bfd_link_hash_undefweak
2562 || h->root.type == bfd_link_hash_undefined))))
2564 /* Make sure this symbol is output as a dynamic symbol.
2565 Undefined weak syms won't yet be marked as dynamic. */
2566 if (h->dynindx == -1
2567 && !h->forced_local)
2569 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2573 /* If that succeeded, we know we'll be keeping all the
2575 if (h->dynindx != -1)
2579 eh->dyn_relocs = NULL;
2584 /* Finally, allocate space. */
2585 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2589 sreloc = elf_section_data (p->sec)->sreloc;
2591 BFD_ASSERT (sreloc != NULL);
2592 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2598 /* Allocate space in .plt, .got and associated reloc sections for
2599 local dynamic relocs. */
2602 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2604 struct elf_link_hash_entry *h
2605 = (struct elf_link_hash_entry *) *slot;
2607 if (h->type != STT_GNU_IFUNC
2611 || h->root.type != bfd_link_hash_defined)
2614 return elf_i386_allocate_dynrelocs (h, inf);
2617 /* Find any dynamic relocs that apply to read-only sections. */
2620 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2622 struct elf_i386_link_hash_entry *eh;
2623 struct elf_dyn_relocs *p;
2625 /* Skip local IFUNC symbols. */
2626 if (h->forced_local && h->type == STT_GNU_IFUNC)
2629 eh = (struct elf_i386_link_hash_entry *) h;
2630 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2632 asection *s = p->sec->output_section;
2634 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2636 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2638 info->flags |= DF_TEXTREL;
2640 if ((info->warn_shared_textrel && info->shared)
2641 || info->error_textrel)
2642 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2643 p->sec->owner, h->root.root.string,
2646 /* Not an error, just cut short the traversal. */
2654 mov foo@GOT(%reg), %reg
2656 lea foo@GOTOFF(%reg), %reg
2657 with the local symbol, foo. */
2660 elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2661 struct bfd_link_info *link_info)
2663 Elf_Internal_Shdr *symtab_hdr;
2664 Elf_Internal_Rela *internal_relocs;
2665 Elf_Internal_Rela *irel, *irelend;
2667 struct elf_i386_link_hash_table *htab;
2668 bfd_boolean changed_contents;
2669 bfd_boolean changed_relocs;
2670 bfd_signed_vma *local_got_refcounts;
2672 /* Don't even try to convert non-ELF outputs. */
2673 if (!is_elf_hash_table (link_info->hash))
2676 /* Nothing to do if there is no need or no output. */
2677 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2678 || sec->need_convert_mov_to_lea == 0
2679 || bfd_is_abs_section (sec->output_section))
2682 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2684 /* Load the relocations for this section. */
2685 internal_relocs = (_bfd_elf_link_read_relocs
2686 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2687 link_info->keep_memory));
2688 if (internal_relocs == NULL)
2691 htab = elf_i386_hash_table (link_info);
2692 changed_contents = FALSE;
2693 changed_relocs = FALSE;
2694 local_got_refcounts = elf_local_got_refcounts (abfd);
2696 /* Get the section contents. */
2697 if (elf_section_data (sec)->this_hdr.contents != NULL)
2698 contents = elf_section_data (sec)->this_hdr.contents;
2701 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2705 irelend = internal_relocs + sec->reloc_count;
2706 for (irel = internal_relocs; irel < irelend; irel++)
2708 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2709 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2711 struct elf_link_hash_entry *h;
2713 if (r_type != R_386_GOT32)
2716 /* Get the symbol referred to by the reloc. */
2717 if (r_symndx < symtab_hdr->sh_info)
2719 Elf_Internal_Sym *isym;
2721 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2724 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2725 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2726 && irel->r_offset >= 2
2727 && bfd_get_8 (abfd, contents + irel->r_offset - 2) == 0x8b)
2729 bfd_put_8 (abfd, 0x8d, contents + irel->r_offset - 2);
2730 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2731 if (local_got_refcounts != NULL
2732 && local_got_refcounts[r_symndx] > 0)
2733 local_got_refcounts[r_symndx] -= 1;
2734 changed_contents = TRUE;
2735 changed_relocs = TRUE;
2740 indx = r_symndx - symtab_hdr->sh_info;
2741 h = elf_sym_hashes (abfd)[indx];
2742 BFD_ASSERT (h != NULL);
2744 while (h->root.type == bfd_link_hash_indirect
2745 || h->root.type == bfd_link_hash_warning)
2746 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2748 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2749 optimizing _DYNAMIC since ld.so may use its link-time address. */
2751 && h->type != STT_GNU_IFUNC
2752 && h != htab->elf.hdynamic
2753 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2754 && irel->r_offset >= 2
2755 && bfd_get_8 (abfd, contents + irel->r_offset - 2) == 0x8b)
2757 bfd_put_8 (abfd, 0x8d, contents + irel->r_offset - 2);
2758 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2759 if (h->got.refcount > 0)
2760 h->got.refcount -= 1;
2761 changed_contents = TRUE;
2762 changed_relocs = TRUE;
2766 if (contents != NULL
2767 && elf_section_data (sec)->this_hdr.contents != contents)
2769 if (!changed_contents && !link_info->keep_memory)
2773 /* Cache the section contents for elf_link_input_bfd. */
2774 elf_section_data (sec)->this_hdr.contents = contents;
2778 if (elf_section_data (sec)->relocs != internal_relocs)
2780 if (!changed_relocs)
2781 free (internal_relocs);
2783 elf_section_data (sec)->relocs = internal_relocs;
2789 if (contents != NULL
2790 && elf_section_data (sec)->this_hdr.contents != contents)
2792 if (internal_relocs != NULL
2793 && elf_section_data (sec)->relocs != internal_relocs)
2794 free (internal_relocs);
2798 /* Set the sizes of the dynamic sections. */
2801 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2803 struct elf_i386_link_hash_table *htab;
2809 htab = elf_i386_hash_table (info);
2812 dynobj = htab->elf.dynobj;
2816 if (htab->elf.dynamic_sections_created)
2818 /* Set the contents of the .interp section to the interpreter. */
2819 if (info->executable)
2821 s = bfd_get_linker_section (dynobj, ".interp");
2824 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2825 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2829 /* Set up .got offsets for local syms, and space for local dynamic
2831 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2833 bfd_signed_vma *local_got;
2834 bfd_signed_vma *end_local_got;
2835 char *local_tls_type;
2836 bfd_vma *local_tlsdesc_gotent;
2837 bfd_size_type locsymcount;
2838 Elf_Internal_Shdr *symtab_hdr;
2841 if (! is_i386_elf (ibfd))
2844 for (s = ibfd->sections; s != NULL; s = s->next)
2846 struct elf_dyn_relocs *p;
2848 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2851 for (p = ((struct elf_dyn_relocs *)
2852 elf_section_data (s)->local_dynrel);
2856 if (!bfd_is_abs_section (p->sec)
2857 && bfd_is_abs_section (p->sec->output_section))
2859 /* Input section has been discarded, either because
2860 it is a copy of a linkonce section or due to
2861 linker script /DISCARD/, so we'll be discarding
2864 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
2865 && strcmp (p->sec->output_section->name,
2868 /* Relocations in vxworks .tls_vars sections are
2869 handled specially by the loader. */
2871 else if (p->count != 0)
2873 srel = elf_section_data (p->sec)->sreloc;
2874 srel->size += p->count * sizeof (Elf32_External_Rel);
2875 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2876 && (info->flags & DF_TEXTREL) == 0)
2878 info->flags |= DF_TEXTREL;
2879 if ((info->warn_shared_textrel && info->shared)
2880 || info->error_textrel)
2881 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2882 p->sec->owner, p->sec);
2888 local_got = elf_local_got_refcounts (ibfd);
2892 symtab_hdr = &elf_symtab_hdr (ibfd);
2893 locsymcount = symtab_hdr->sh_info;
2894 end_local_got = local_got + locsymcount;
2895 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2896 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2898 srel = htab->elf.srelgot;
2899 for (; local_got < end_local_got;
2900 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2902 *local_tlsdesc_gotent = (bfd_vma) -1;
2905 if (GOT_TLS_GDESC_P (*local_tls_type))
2907 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2908 - elf_i386_compute_jump_table_size (htab);
2909 htab->elf.sgotplt->size += 8;
2910 *local_got = (bfd_vma) -2;
2912 if (! GOT_TLS_GDESC_P (*local_tls_type)
2913 || GOT_TLS_GD_P (*local_tls_type))
2915 *local_got = s->size;
2917 if (GOT_TLS_GD_P (*local_tls_type)
2918 || *local_tls_type == GOT_TLS_IE_BOTH)
2922 || GOT_TLS_GD_ANY_P (*local_tls_type)
2923 || (*local_tls_type & GOT_TLS_IE))
2925 if (*local_tls_type == GOT_TLS_IE_BOTH)
2926 srel->size += 2 * sizeof (Elf32_External_Rel);
2927 else if (GOT_TLS_GD_P (*local_tls_type)
2928 || ! GOT_TLS_GDESC_P (*local_tls_type))
2929 srel->size += sizeof (Elf32_External_Rel);
2930 if (GOT_TLS_GDESC_P (*local_tls_type))
2931 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2935 *local_got = (bfd_vma) -1;
2939 if (htab->tls_ldm_got.refcount > 0)
2941 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2943 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2944 htab->elf.sgot->size += 8;
2945 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2948 htab->tls_ldm_got.offset = -1;
2950 /* Allocate global sym .plt and .got entries, and space for global
2951 sym dynamic relocs. */
2952 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2954 /* Allocate .plt and .got entries, and space for local symbols. */
2955 htab_traverse (htab->loc_hash_table,
2956 elf_i386_allocate_local_dynrelocs,
2959 /* For every jump slot reserved in the sgotplt, reloc_count is
2960 incremented. However, when we reserve space for TLS descriptors,
2961 it's not incremented, so in order to compute the space reserved
2962 for them, it suffices to multiply the reloc count by the jump
2965 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2966 so that R_386_IRELATIVE entries come last. */
2967 if (htab->elf.srelplt)
2969 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2970 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2971 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2973 else if (htab->elf.irelplt)
2974 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2977 if (htab->elf.sgotplt)
2979 /* Don't allocate .got.plt section if there are no GOT nor PLT
2980 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2981 if ((htab->elf.hgot == NULL
2982 || !htab->elf.hgot->ref_regular_nonweak)
2983 && (htab->elf.sgotplt->size
2984 == get_elf_backend_data (output_bfd)->got_header_size)
2985 && (htab->elf.splt == NULL
2986 || htab->elf.splt->size == 0)
2987 && (htab->elf.sgot == NULL
2988 || htab->elf.sgot->size == 0)
2989 && (htab->elf.iplt == NULL
2990 || htab->elf.iplt->size == 0)
2991 && (htab->elf.igotplt == NULL
2992 || htab->elf.igotplt->size == 0))
2993 htab->elf.sgotplt->size = 0;
2997 if (htab->plt_eh_frame != NULL
2998 && htab->elf.splt != NULL
2999 && htab->elf.splt->size != 0
3000 && !bfd_is_abs_section (htab->elf.splt->output_section)
3001 && _bfd_elf_eh_frame_present (info))
3002 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
3004 /* We now have determined the sizes of the various dynamic sections.
3005 Allocate memory for them. */
3007 for (s = dynobj->sections; s != NULL; s = s->next)
3009 bfd_boolean strip_section = TRUE;
3011 if ((s->flags & SEC_LINKER_CREATED) == 0)
3014 if (s == htab->elf.splt
3015 || s == htab->elf.sgot)
3017 /* Strip this section if we don't need it; see the
3019 /* We'd like to strip these sections if they aren't needed, but if
3020 we've exported dynamic symbols from them we must leave them.
3021 It's too late to tell BFD to get rid of the symbols. */
3023 if (htab->elf.hplt != NULL)
3024 strip_section = FALSE;
3026 else if (s == htab->elf.sgotplt
3027 || s == htab->elf.iplt
3028 || s == htab->elf.igotplt
3029 || s == htab->plt_got
3030 || s == htab->plt_eh_frame
3031 || s == htab->sdynbss)
3033 /* Strip these too. */
3035 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
3038 && s != htab->elf.srelplt
3039 && s != htab->srelplt2)
3042 /* We use the reloc_count field as a counter if we need
3043 to copy relocs into the output file. */
3048 /* It's not one of our sections, so don't allocate space. */
3054 /* If we don't need this section, strip it from the
3055 output file. This is mostly to handle .rel.bss and
3056 .rel.plt. We must create both sections in
3057 create_dynamic_sections, because they must be created
3058 before the linker maps input sections to output
3059 sections. The linker does that before
3060 adjust_dynamic_symbol is called, and it is that
3061 function which decides whether anything needs to go
3062 into these sections. */
3064 s->flags |= SEC_EXCLUDE;
3068 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3071 /* Allocate memory for the section contents. We use bfd_zalloc
3072 here in case unused entries are not reclaimed before the
3073 section's contents are written out. This should not happen,
3074 but this way if it does, we get a R_386_NONE reloc instead
3076 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3077 if (s->contents == NULL)
3081 if (htab->plt_eh_frame != NULL
3082 && htab->plt_eh_frame->contents != NULL)
3084 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3085 sizeof (elf_i386_eh_frame_plt));
3086 bfd_put_32 (dynobj, htab->elf.splt->size,
3087 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3090 if (htab->elf.dynamic_sections_created)
3092 /* Add some entries to the .dynamic section. We fill in the
3093 values later, in elf_i386_finish_dynamic_sections, but we
3094 must add the entries now so that we get the correct size for
3095 the .dynamic section. The DT_DEBUG entry is filled in by the
3096 dynamic linker and used by the debugger. */
3097 #define add_dynamic_entry(TAG, VAL) \
3098 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3100 if (info->executable)
3102 if (!add_dynamic_entry (DT_DEBUG, 0))
3106 if (htab->elf.splt->size != 0)
3108 if (!add_dynamic_entry (DT_PLTGOT, 0)
3109 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3110 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3111 || !add_dynamic_entry (DT_JMPREL, 0))
3117 if (!add_dynamic_entry (DT_REL, 0)
3118 || !add_dynamic_entry (DT_RELSZ, 0)
3119 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3122 /* If any dynamic relocs apply to a read-only section,
3123 then we need a DT_TEXTREL entry. */
3124 if ((info->flags & DF_TEXTREL) == 0)
3125 elf_link_hash_traverse (&htab->elf,
3126 elf_i386_readonly_dynrelocs, info);
3128 if ((info->flags & DF_TEXTREL) != 0)
3130 if (!add_dynamic_entry (DT_TEXTREL, 0))
3134 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3135 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3138 #undef add_dynamic_entry
3144 elf_i386_always_size_sections (bfd *output_bfd,
3145 struct bfd_link_info *info)
3147 asection *tls_sec = elf_hash_table (info)->tls_sec;
3151 struct elf_link_hash_entry *tlsbase;
3153 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3154 "_TLS_MODULE_BASE_",
3155 FALSE, FALSE, FALSE);
3157 if (tlsbase && tlsbase->type == STT_TLS)
3159 struct elf_i386_link_hash_table *htab;
3160 struct bfd_link_hash_entry *bh = NULL;
3161 const struct elf_backend_data *bed
3162 = get_elf_backend_data (output_bfd);
3164 htab = elf_i386_hash_table (info);
3168 if (!(_bfd_generic_link_add_one_symbol
3169 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3170 tls_sec, 0, NULL, FALSE,
3171 bed->collect, &bh)))
3174 htab->tls_module_base = bh;
3176 tlsbase = (struct elf_link_hash_entry *)bh;
3177 tlsbase->def_regular = 1;
3178 tlsbase->other = STV_HIDDEN;
3179 tlsbase->root.linker_def = 1;
3180 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3187 /* Set the correct type for an x86 ELF section. We do this by the
3188 section name, which is a hack, but ought to work. */
3191 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3192 Elf_Internal_Shdr *hdr,
3197 name = bfd_get_section_name (abfd, sec);
3199 /* This is an ugly, but unfortunately necessary hack that is
3200 needed when producing EFI binaries on x86. It tells
3201 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3202 containing ELF relocation info. We need this hack in order to
3203 be able to generate ELF binaries that can be translated into
3204 EFI applications (which are essentially COFF objects). Those
3205 files contain a COFF ".reloc" section inside an ELFNN object,
3206 which would normally cause BFD to segfault because it would
3207 attempt to interpret this section as containing relocation
3208 entries for section "oc". With this hack enabled, ".reloc"
3209 will be treated as a normal data section, which will avoid the
3210 segfault. However, you won't be able to create an ELFNN binary
3211 with a section named "oc" that needs relocations, but that's
3212 the kind of ugly side-effects you get when detecting section
3213 types based on their names... In practice, this limitation is
3214 unlikely to bite. */
3215 if (strcmp (name, ".reloc") == 0)
3216 hdr->sh_type = SHT_PROGBITS;
3221 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3222 executables. Rather than setting it to the beginning of the TLS
3223 section, we have to set it to the end. This function may be called
3224 multiple times, it is idempotent. */
3227 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3229 struct elf_i386_link_hash_table *htab;
3230 struct bfd_link_hash_entry *base;
3232 if (!info->executable)
3235 htab = elf_i386_hash_table (info);
3239 base = htab->tls_module_base;
3243 base->u.def.value = htab->elf.tls_size;
3246 /* Return the base VMA address which should be subtracted from real addresses
3247 when resolving @dtpoff relocation.
3248 This is PT_TLS segment p_vaddr. */
3251 elf_i386_dtpoff_base (struct bfd_link_info *info)
3253 /* If tls_sec is NULL, we should have signalled an error already. */
3254 if (elf_hash_table (info)->tls_sec == NULL)
3256 return elf_hash_table (info)->tls_sec->vma;
3259 /* Return the relocation value for @tpoff relocation
3260 if STT_TLS virtual address is ADDRESS. */
3263 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3265 struct elf_link_hash_table *htab = elf_hash_table (info);
3266 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3267 bfd_vma static_tls_size;
3269 /* If tls_sec is NULL, we should have signalled an error already. */
3270 if (htab->tls_sec == NULL)
3273 /* Consider special static TLS alignment requirements. */
3274 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3275 return static_tls_size + htab->tls_sec->vma - address;
3278 /* Relocate an i386 ELF section. */
3281 elf_i386_relocate_section (bfd *output_bfd,
3282 struct bfd_link_info *info,
3284 asection *input_section,
3286 Elf_Internal_Rela *relocs,
3287 Elf_Internal_Sym *local_syms,
3288 asection **local_sections)
3290 struct elf_i386_link_hash_table *htab;
3291 Elf_Internal_Shdr *symtab_hdr;
3292 struct elf_link_hash_entry **sym_hashes;
3293 bfd_vma *local_got_offsets;
3294 bfd_vma *local_tlsdesc_gotents;
3295 Elf_Internal_Rela *rel;
3296 Elf_Internal_Rela *relend;
3297 bfd_boolean is_vxworks_tls;
3298 unsigned plt_entry_size;
3300 BFD_ASSERT (is_i386_elf (input_bfd));
3302 htab = elf_i386_hash_table (info);
3305 symtab_hdr = &elf_symtab_hdr (input_bfd);
3306 sym_hashes = elf_sym_hashes (input_bfd);
3307 local_got_offsets = elf_local_got_offsets (input_bfd);
3308 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3309 /* We have to handle relocations in vxworks .tls_vars sections
3310 specially, because the dynamic loader is 'weird'. */
3311 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3313 && !strcmp (input_section->output_section->name,
3316 elf_i386_set_tls_module_base (info);
3318 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3321 relend = relocs + input_section->reloc_count;
3322 for (; rel < relend; rel++)
3324 unsigned int r_type;
3325 reloc_howto_type *howto;
3326 unsigned long r_symndx;
3327 struct elf_link_hash_entry *h;
3328 struct elf_i386_link_hash_entry *eh;
3329 Elf_Internal_Sym *sym;
3331 bfd_vma off, offplt, plt_offset;
3333 bfd_boolean unresolved_reloc;
3334 bfd_reloc_status_type r;
3338 asection *resolved_plt;
3340 r_type = ELF32_R_TYPE (rel->r_info);
3341 if (r_type == R_386_GNU_VTINHERIT
3342 || r_type == R_386_GNU_VTENTRY)
3345 if ((indx = r_type) >= R_386_standard
3346 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3347 >= R_386_ext - R_386_standard)
3348 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3349 >= R_386_irelative - R_386_ext))
3351 (*_bfd_error_handler)
3352 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3353 input_bfd, input_section, r_type);
3354 bfd_set_error (bfd_error_bad_value);
3357 howto = elf_howto_table + indx;
3359 r_symndx = ELF32_R_SYM (rel->r_info);
3363 unresolved_reloc = FALSE;
3364 if (r_symndx < symtab_hdr->sh_info)
3366 sym = local_syms + r_symndx;
3367 sec = local_sections[r_symndx];
3368 relocation = (sec->output_section->vma
3369 + sec->output_offset
3371 st_size = sym->st_size;
3373 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3374 && ((sec->flags & SEC_MERGE) != 0
3375 || (info->relocatable
3376 && sec->output_offset != 0)))
3379 bfd_byte *where = contents + rel->r_offset;
3381 switch (howto->size)
3384 addend = bfd_get_8 (input_bfd, where);
3385 if (howto->pc_relative)
3387 addend = (addend ^ 0x80) - 0x80;
3392 addend = bfd_get_16 (input_bfd, where);
3393 if (howto->pc_relative)
3395 addend = (addend ^ 0x8000) - 0x8000;
3400 addend = bfd_get_32 (input_bfd, where);
3401 if (howto->pc_relative)
3403 addend = (addend ^ 0x80000000) - 0x80000000;
3411 if (info->relocatable)
3412 addend += sec->output_offset;
3415 asection *msec = sec;
3416 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3418 addend -= relocation;
3419 addend += msec->output_section->vma + msec->output_offset;
3422 switch (howto->size)
3425 /* FIXME: overflow checks. */
3426 if (howto->pc_relative)
3428 bfd_put_8 (input_bfd, addend, where);
3431 if (howto->pc_relative)
3433 bfd_put_16 (input_bfd, addend, where);
3436 if (howto->pc_relative)
3438 bfd_put_32 (input_bfd, addend, where);
3442 else if (!info->relocatable
3443 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3445 /* Relocate against local STT_GNU_IFUNC symbol. */
3446 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3451 /* Set STT_GNU_IFUNC symbol value. */
3452 h->root.u.def.value = sym->st_value;
3453 h->root.u.def.section = sec;
3458 bfd_boolean warned ATTRIBUTE_UNUSED;
3459 bfd_boolean ignored ATTRIBUTE_UNUSED;
3461 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3462 r_symndx, symtab_hdr, sym_hashes,
3464 unresolved_reloc, warned, ignored);
3468 if (sec != NULL && discarded_section (sec))
3469 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3470 rel, 1, relend, howto, 0, contents);
3472 if (info->relocatable)
3475 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3476 it here if it is defined in a non-shared object. */
3478 && h->type == STT_GNU_IFUNC
3481 asection *plt, *gotplt, *base_got;
3485 if ((input_section->flags & SEC_ALLOC) == 0
3486 || h->plt.offset == (bfd_vma) -1)
3489 /* STT_GNU_IFUNC symbol must go through PLT. */
3490 if (htab->elf.splt != NULL)
3492 plt = htab->elf.splt;
3493 gotplt = htab->elf.sgotplt;
3497 plt = htab->elf.iplt;
3498 gotplt = htab->elf.igotplt;
3501 relocation = (plt->output_section->vma
3502 + plt->output_offset + h->plt.offset);
3507 if (h->root.root.string)
3508 name = h->root.root.string;
3510 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3512 (*_bfd_error_handler)
3513 (_("%B: relocation %s against STT_GNU_IFUNC "
3514 "symbol `%s' isn't handled by %s"), input_bfd,
3515 elf_howto_table[r_type].name,
3516 name, __FUNCTION__);
3517 bfd_set_error (bfd_error_bad_value);
3521 /* Generate dynamic relcoation only when there is a
3522 non-GOT reference in a shared object. */
3523 if (info->shared && h->non_got_ref)
3525 Elf_Internal_Rela outrel;
3529 /* Need a dynamic relocation to get the real function
3531 offset = _bfd_elf_section_offset (output_bfd,
3535 if (offset == (bfd_vma) -1
3536 || offset == (bfd_vma) -2)
3539 outrel.r_offset = (input_section->output_section->vma
3540 + input_section->output_offset
3543 if (h->dynindx == -1
3545 || info->executable)
3547 /* This symbol is resolved locally. */
3548 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3549 bfd_put_32 (output_bfd,
3550 (h->root.u.def.value
3551 + h->root.u.def.section->output_section->vma
3552 + h->root.u.def.section->output_offset),
3556 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3558 sreloc = htab->elf.irelifunc;
3559 elf_append_rel (output_bfd, sreloc, &outrel);
3561 /* If this reloc is against an external symbol, we
3562 do not want to fiddle with the addend. Otherwise,
3563 we need to include the symbol value so that it
3564 becomes an addend for the dynamic reloc. For an
3565 internal symbol, we have updated addend. */
3574 base_got = htab->elf.sgot;
3575 off = h->got.offset;
3577 if (base_got == NULL)
3580 if (off == (bfd_vma) -1)
3582 /* We can't use h->got.offset here to save state, or
3583 even just remember the offset, as finish_dynamic_symbol
3584 would use that as offset into .got. */
3586 if (htab->elf.splt != NULL)
3588 plt_index = h->plt.offset / plt_entry_size - 1;
3589 off = (plt_index + 3) * 4;
3590 base_got = htab->elf.sgotplt;
3594 plt_index = h->plt.offset / plt_entry_size;
3595 off = plt_index * 4;
3596 base_got = htab->elf.igotplt;
3599 if (h->dynindx == -1
3603 /* This references the local defitionion. We must
3604 initialize this entry in the global offset table.
3605 Since the offset must always be a multiple of 8,
3606 we use the least significant bit to record
3607 whether we have initialized it already.
3609 When doing a dynamic link, we create a .rela.got
3610 relocation entry to initialize the value. This
3611 is done in the finish_dynamic_symbol routine. */
3616 bfd_put_32 (output_bfd, relocation,
3617 base_got->contents + off);
3624 /* Adjust for static executables. */
3625 if (htab->elf.splt == NULL)
3626 relocation += gotplt->output_offset;
3630 relocation = (base_got->output_section->vma
3631 + base_got->output_offset + off
3632 - gotplt->output_section->vma
3633 - gotplt->output_offset);
3634 /* Adjust for static executables. */
3635 if (htab->elf.splt == NULL)
3636 relocation += gotplt->output_offset;
3642 relocation -= (gotplt->output_section->vma
3643 + gotplt->output_offset);
3651 /* Relocation is to the entry for this symbol in the global
3653 if (htab->elf.sgot == NULL)
3660 off = h->got.offset;
3661 dyn = htab->elf.dynamic_sections_created;
3662 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3664 && SYMBOL_REFERENCES_LOCAL (info, h))
3665 || (ELF_ST_VISIBILITY (h->other)
3666 && h->root.type == bfd_link_hash_undefweak))
3668 /* This is actually a static link, or it is a
3669 -Bsymbolic link and the symbol is defined
3670 locally, or the symbol was forced to be local
3671 because of a version file. We must initialize
3672 this entry in the global offset table. Since the
3673 offset must always be a multiple of 4, we use the
3674 least significant bit to record whether we have
3675 initialized it already.
3677 When doing a dynamic link, we create a .rel.got
3678 relocation entry to initialize the value. This
3679 is done in the finish_dynamic_symbol routine. */
3684 bfd_put_32 (output_bfd, relocation,
3685 htab->elf.sgot->contents + off);
3690 unresolved_reloc = FALSE;
3694 if (local_got_offsets == NULL)
3697 off = local_got_offsets[r_symndx];
3699 /* The offset must always be a multiple of 4. We use
3700 the least significant bit to record whether we have
3701 already generated the necessary reloc. */
3706 bfd_put_32 (output_bfd, relocation,
3707 htab->elf.sgot->contents + off);
3712 Elf_Internal_Rela outrel;
3714 s = htab->elf.srelgot;
3718 outrel.r_offset = (htab->elf.sgot->output_section->vma
3719 + htab->elf.sgot->output_offset
3721 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3722 elf_append_rel (output_bfd, s, &outrel);
3725 local_got_offsets[r_symndx] |= 1;
3729 if (off >= (bfd_vma) -2)
3732 relocation = htab->elf.sgot->output_section->vma
3733 + htab->elf.sgot->output_offset + off
3734 - htab->elf.sgotplt->output_section->vma
3735 - htab->elf.sgotplt->output_offset;
3739 /* Relocation is relative to the start of the global offset
3742 /* Check to make sure it isn't a protected function or data
3743 symbol for shared library since it may not be local when
3744 used as function address or with copy relocation. We also
3745 need to make sure that a symbol is referenced locally. */
3746 if (!info->executable && h)
3748 if (!h->def_regular)
3752 switch (ELF_ST_VISIBILITY (h->other))
3755 v = _("hidden symbol");
3758 v = _("internal symbol");
3761 v = _("protected symbol");
3768 (*_bfd_error_handler)
3769 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3770 input_bfd, v, h->root.root.string);
3771 bfd_set_error (bfd_error_bad_value);
3774 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3775 && (h->type == STT_FUNC
3776 || h->type == STT_OBJECT)
3777 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3779 (*_bfd_error_handler)
3780 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
3782 h->type == STT_FUNC ? "function" : "data",
3783 h->root.root.string);
3784 bfd_set_error (bfd_error_bad_value);
3789 /* Note that sgot is not involved in this
3790 calculation. We always want the start of .got.plt. If we
3791 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3792 permitted by the ABI, we might have to change this
3794 relocation -= htab->elf.sgotplt->output_section->vma
3795 + htab->elf.sgotplt->output_offset;
3799 /* Use global offset table as symbol value. */
3800 relocation = htab->elf.sgotplt->output_section->vma
3801 + htab->elf.sgotplt->output_offset;
3802 unresolved_reloc = FALSE;
3806 /* Relocation is to the entry for this symbol in the
3807 procedure linkage table. */
3809 /* Resolve a PLT32 reloc against a local symbol directly,
3810 without using the procedure linkage table. */
3814 eh = (struct elf_i386_link_hash_entry *) h;
3815 if ((h->plt.offset == (bfd_vma) -1
3816 && eh->plt_got.offset == (bfd_vma) -1)
3817 || htab->elf.splt == NULL)
3819 /* We didn't make a PLT entry for this symbol. This
3820 happens when statically linking PIC code, or when
3821 using -Bsymbolic. */
3825 if (h->plt.offset != (bfd_vma) -1)
3827 resolved_plt = htab->elf.splt;
3828 plt_offset = h->plt.offset;
3832 resolved_plt = htab->plt_got;
3833 plt_offset = eh->plt_got.offset;
3836 relocation = (resolved_plt->output_section->vma
3837 + resolved_plt->output_offset
3839 unresolved_reloc = FALSE;
3843 /* Set to symbol size. */
3844 relocation = st_size;
3849 if ((input_section->flags & SEC_ALLOC) == 0
3855 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3856 || h->root.type != bfd_link_hash_undefweak)
3857 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3858 || !SYMBOL_CALLS_LOCAL (info, h)))
3859 || (ELIMINATE_COPY_RELOCS
3866 || h->root.type == bfd_link_hash_undefweak
3867 || h->root.type == bfd_link_hash_undefined)))
3869 Elf_Internal_Rela outrel;
3870 bfd_boolean skip, relocate;
3873 /* When generating a shared object, these relocations
3874 are copied into the output file to be resolved at run
3881 _bfd_elf_section_offset (output_bfd, info, input_section,
3883 if (outrel.r_offset == (bfd_vma) -1)
3885 else if (outrel.r_offset == (bfd_vma) -2)
3886 skip = TRUE, relocate = TRUE;
3887 outrel.r_offset += (input_section->output_section->vma
3888 + input_section->output_offset);
3891 memset (&outrel, 0, sizeof outrel);
3894 && (r_type == R_386_PC32
3896 || !SYMBOLIC_BIND (info, h)
3897 || !h->def_regular))
3898 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3901 /* This symbol is local, or marked to become local. */
3903 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3906 sreloc = elf_section_data (input_section)->sreloc;
3908 if (sreloc == NULL || sreloc->contents == NULL)
3910 r = bfd_reloc_notsupported;
3911 goto check_relocation_error;
3914 elf_append_rel (output_bfd, sreloc, &outrel);
3916 /* If this reloc is against an external symbol, we do
3917 not want to fiddle with the addend. Otherwise, we
3918 need to include the symbol value so that it becomes
3919 an addend for the dynamic reloc. */
3926 if (!info->executable)
3928 Elf_Internal_Rela outrel;
3931 outrel.r_offset = rel->r_offset
3932 + input_section->output_section->vma
3933 + input_section->output_offset;
3934 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3935 sreloc = elf_section_data (input_section)->sreloc;
3938 elf_append_rel (output_bfd, sreloc, &outrel);
3943 case R_386_TLS_GOTDESC:
3944 case R_386_TLS_DESC_CALL:
3945 case R_386_TLS_IE_32:
3946 case R_386_TLS_GOTIE:
3947 tls_type = GOT_UNKNOWN;
3948 if (h == NULL && local_got_offsets)
3949 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3951 tls_type = elf_i386_hash_entry(h)->tls_type;
3952 if (tls_type == GOT_TLS_IE)
3953 tls_type = GOT_TLS_IE_NEG;
3955 if (! elf_i386_tls_transition (info, input_bfd,
3956 input_section, contents,
3957 symtab_hdr, sym_hashes,
3958 &r_type, tls_type, rel,
3959 relend, h, r_symndx))
3962 if (r_type == R_386_TLS_LE_32)
3964 BFD_ASSERT (! unresolved_reloc);
3965 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3970 /* GD->LE transition. */
3971 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3974 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3976 movl %gs:0, %eax; subl $foo@tpoff, %eax
3977 (6 byte form of subl). */
3978 memcpy (contents + rel->r_offset - 3,
3979 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3980 roff = rel->r_offset + 5;
3984 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3986 movl %gs:0, %eax; subl $foo@tpoff, %eax
3987 (6 byte form of subl). */
3988 memcpy (contents + rel->r_offset - 2,
3989 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3990 roff = rel->r_offset + 6;
3992 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3994 /* Skip R_386_PC32/R_386_PLT32. */
3998 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4000 /* GDesc -> LE transition.
4001 It's originally something like:
4002 leal x@tlsdesc(%ebx), %eax
4006 Registers other than %eax may be set up here. */
4011 roff = rel->r_offset;
4012 val = bfd_get_8 (input_bfd, contents + roff - 1);
4014 /* Now modify the instruction as appropriate. */
4015 /* aoliva FIXME: remove the above and xor the byte
4017 bfd_put_8 (output_bfd, val ^ 0x86,
4018 contents + roff - 1);
4019 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4023 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4025 /* GDesc -> LE transition.
4033 roff = rel->r_offset;
4034 bfd_put_8 (output_bfd, 0x66, contents + roff);
4035 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4038 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4042 /* IE->LE transition:
4043 Originally it can be one of:
4051 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4054 /* movl foo, %eax. */
4055 bfd_put_8 (output_bfd, 0xb8,
4056 contents + rel->r_offset - 1);
4062 type = bfd_get_8 (input_bfd,
4063 contents + rel->r_offset - 2);
4068 bfd_put_8 (output_bfd, 0xc7,
4069 contents + rel->r_offset - 2);
4070 bfd_put_8 (output_bfd,
4071 0xc0 | ((val >> 3) & 7),
4072 contents + rel->r_offset - 1);
4076 bfd_put_8 (output_bfd, 0x81,
4077 contents + rel->r_offset - 2);
4078 bfd_put_8 (output_bfd,
4079 0xc0 | ((val >> 3) & 7),
4080 contents + rel->r_offset - 1);
4087 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4088 contents + rel->r_offset);
4093 unsigned int val, type;
4095 /* {IE_32,GOTIE}->LE transition:
4096 Originally it can be one of:
4097 subl foo(%reg1), %reg2
4098 movl foo(%reg1), %reg2
4099 addl foo(%reg1), %reg2
4102 movl $foo, %reg2 (6 byte form)
4103 addl $foo, %reg2. */
4104 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4105 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4109 bfd_put_8 (output_bfd, 0xc7,
4110 contents + rel->r_offset - 2);
4111 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4112 contents + rel->r_offset - 1);
4114 else if (type == 0x2b)
4117 bfd_put_8 (output_bfd, 0x81,
4118 contents + rel->r_offset - 2);
4119 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4120 contents + rel->r_offset - 1);
4122 else if (type == 0x03)
4125 bfd_put_8 (output_bfd, 0x81,
4126 contents + rel->r_offset - 2);
4127 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4128 contents + rel->r_offset - 1);
4132 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4133 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4134 contents + rel->r_offset);
4136 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4137 contents + rel->r_offset);
4142 if (htab->elf.sgot == NULL)
4147 off = h->got.offset;
4148 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4152 if (local_got_offsets == NULL)
4155 off = local_got_offsets[r_symndx];
4156 offplt = local_tlsdesc_gotents[r_symndx];
4163 Elf_Internal_Rela outrel;
4167 if (htab->elf.srelgot == NULL)
4170 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4172 if (GOT_TLS_GDESC_P (tls_type))
4175 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4176 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4177 <= htab->elf.sgotplt->size);
4178 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4179 + htab->elf.sgotplt->output_offset
4181 + htab->sgotplt_jump_table_size);
4182 sreloc = htab->elf.srelplt;
4183 loc = sreloc->contents;
4184 loc += (htab->next_tls_desc_index++
4185 * sizeof (Elf32_External_Rel));
4186 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4187 <= sreloc->contents + sreloc->size);
4188 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4191 BFD_ASSERT (! unresolved_reloc);
4192 bfd_put_32 (output_bfd,
4193 relocation - elf_i386_dtpoff_base (info),
4194 htab->elf.sgotplt->contents + offplt
4195 + htab->sgotplt_jump_table_size + 4);
4199 bfd_put_32 (output_bfd, 0,
4200 htab->elf.sgotplt->contents + offplt
4201 + htab->sgotplt_jump_table_size + 4);
4205 sreloc = htab->elf.srelgot;
4207 outrel.r_offset = (htab->elf.sgot->output_section->vma
4208 + htab->elf.sgot->output_offset + off);
4210 if (GOT_TLS_GD_P (tls_type))
4211 dr_type = R_386_TLS_DTPMOD32;
4212 else if (GOT_TLS_GDESC_P (tls_type))
4214 else if (tls_type == GOT_TLS_IE_POS)
4215 dr_type = R_386_TLS_TPOFF;
4217 dr_type = R_386_TLS_TPOFF32;
4219 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4220 bfd_put_32 (output_bfd,
4221 relocation - elf_i386_dtpoff_base (info),
4222 htab->elf.sgot->contents + off);
4223 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4224 bfd_put_32 (output_bfd,
4225 elf_i386_dtpoff_base (info) - relocation,
4226 htab->elf.sgot->contents + off);
4227 else if (dr_type != R_386_TLS_DESC)
4228 bfd_put_32 (output_bfd, 0,
4229 htab->elf.sgot->contents + off);
4230 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4232 elf_append_rel (output_bfd, sreloc, &outrel);
4234 if (GOT_TLS_GD_P (tls_type))
4238 BFD_ASSERT (! unresolved_reloc);
4239 bfd_put_32 (output_bfd,
4240 relocation - elf_i386_dtpoff_base (info),
4241 htab->elf.sgot->contents + off + 4);
4245 bfd_put_32 (output_bfd, 0,
4246 htab->elf.sgot->contents + off + 4);
4247 outrel.r_info = ELF32_R_INFO (indx,
4248 R_386_TLS_DTPOFF32);
4249 outrel.r_offset += 4;
4250 elf_append_rel (output_bfd, sreloc, &outrel);
4253 else if (tls_type == GOT_TLS_IE_BOTH)
4255 bfd_put_32 (output_bfd,
4257 ? relocation - elf_i386_dtpoff_base (info)
4259 htab->elf.sgot->contents + off + 4);
4260 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4261 outrel.r_offset += 4;
4262 elf_append_rel (output_bfd, sreloc, &outrel);
4269 local_got_offsets[r_symndx] |= 1;
4272 if (off >= (bfd_vma) -2
4273 && ! GOT_TLS_GDESC_P (tls_type))
4275 if (r_type == R_386_TLS_GOTDESC
4276 || r_type == R_386_TLS_DESC_CALL)
4278 relocation = htab->sgotplt_jump_table_size + offplt;
4279 unresolved_reloc = FALSE;
4281 else if (r_type == ELF32_R_TYPE (rel->r_info))
4283 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4284 + htab->elf.sgotplt->output_offset;
4285 relocation = htab->elf.sgot->output_section->vma
4286 + htab->elf.sgot->output_offset + off - g_o_t;
4287 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4288 && tls_type == GOT_TLS_IE_BOTH)
4290 if (r_type == R_386_TLS_IE)
4291 relocation += g_o_t;
4292 unresolved_reloc = FALSE;
4294 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4296 unsigned int val, type;
4299 /* GD->IE transition. */
4300 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4301 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4304 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4306 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4308 roff = rel->r_offset - 3;
4312 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4314 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4315 roff = rel->r_offset - 2;
4317 memcpy (contents + roff,
4318 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4319 contents[roff + 7] = 0x80 | (val & 7);
4320 /* If foo is used only with foo@gotntpoff(%reg) and
4321 foo@indntpoff, but not with foo@gottpoff(%reg), change
4322 subl $foo@gottpoff(%reg), %eax
4324 addl $foo@gotntpoff(%reg), %eax. */
4325 if (tls_type == GOT_TLS_IE_POS)
4326 contents[roff + 6] = 0x03;
4327 bfd_put_32 (output_bfd,
4328 htab->elf.sgot->output_section->vma
4329 + htab->elf.sgot->output_offset + off
4330 - htab->elf.sgotplt->output_section->vma
4331 - htab->elf.sgotplt->output_offset,
4332 contents + roff + 8);
4333 /* Skip R_386_PLT32. */
4337 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4339 /* GDesc -> IE transition.
4340 It's originally something like:
4341 leal x@tlsdesc(%ebx), %eax
4344 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4346 movl x@gottpoff(%ebx), %eax # before negl %eax
4348 Registers other than %eax may be set up here. */
4352 /* First, make sure it's a leal adding ebx to a 32-bit
4353 offset into any register, although it's probably
4354 almost always going to be eax. */
4355 roff = rel->r_offset;
4357 /* Now modify the instruction as appropriate. */
4358 /* To turn a leal into a movl in the form we use it, it
4359 suffices to change the first byte from 0x8d to 0x8b.
4360 aoliva FIXME: should we decide to keep the leal, all
4361 we have to do is remove the statement below, and
4362 adjust the relaxation of R_386_TLS_DESC_CALL. */
4363 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4365 if (tls_type == GOT_TLS_IE_BOTH)
4368 bfd_put_32 (output_bfd,
4369 htab->elf.sgot->output_section->vma
4370 + htab->elf.sgot->output_offset + off
4371 - htab->elf.sgotplt->output_section->vma
4372 - htab->elf.sgotplt->output_offset,
4376 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4378 /* GDesc -> IE transition.
4386 depending on how we transformed the TLS_GOTDESC above.
4391 roff = rel->r_offset;
4393 /* Now modify the instruction as appropriate. */
4394 if (tls_type != GOT_TLS_IE_NEG)
4397 bfd_put_8 (output_bfd, 0x66, contents + roff);
4398 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4403 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4404 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4414 if (! elf_i386_tls_transition (info, input_bfd,
4415 input_section, contents,
4416 symtab_hdr, sym_hashes,
4417 &r_type, GOT_UNKNOWN, rel,
4418 relend, h, r_symndx))
4421 if (r_type != R_386_TLS_LDM)
4423 /* LD->LE transition:
4424 leal foo(%reg), %eax; call ___tls_get_addr.
4426 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4427 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4428 memcpy (contents + rel->r_offset - 2,
4429 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4430 /* Skip R_386_PC32/R_386_PLT32. */
4435 if (htab->elf.sgot == NULL)
4438 off = htab->tls_ldm_got.offset;
4443 Elf_Internal_Rela outrel;
4445 if (htab->elf.srelgot == NULL)
4448 outrel.r_offset = (htab->elf.sgot->output_section->vma
4449 + htab->elf.sgot->output_offset + off);
4451 bfd_put_32 (output_bfd, 0,
4452 htab->elf.sgot->contents + off);
4453 bfd_put_32 (output_bfd, 0,
4454 htab->elf.sgot->contents + off + 4);
4455 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4456 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4457 htab->tls_ldm_got.offset |= 1;
4459 relocation = htab->elf.sgot->output_section->vma
4460 + htab->elf.sgot->output_offset + off
4461 - htab->elf.sgotplt->output_section->vma
4462 - htab->elf.sgotplt->output_offset;
4463 unresolved_reloc = FALSE;
4466 case R_386_TLS_LDO_32:
4467 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
4468 relocation -= elf_i386_dtpoff_base (info);
4470 /* When converting LDO to LE, we must negate. */
4471 relocation = -elf_i386_tpoff (info, relocation);
4474 case R_386_TLS_LE_32:
4476 if (!info->executable)
4478 Elf_Internal_Rela outrel;
4481 outrel.r_offset = rel->r_offset
4482 + input_section->output_section->vma
4483 + input_section->output_offset;
4484 if (h != NULL && h->dynindx != -1)
4488 if (r_type == R_386_TLS_LE_32)
4489 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4491 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4492 sreloc = elf_section_data (input_section)->sreloc;
4495 elf_append_rel (output_bfd, sreloc, &outrel);
4498 else if (r_type == R_386_TLS_LE_32)
4499 relocation = elf_i386_dtpoff_base (info) - relocation;
4501 relocation -= elf_i386_dtpoff_base (info);
4503 else if (r_type == R_386_TLS_LE_32)
4504 relocation = elf_i386_tpoff (info, relocation);
4506 relocation = -elf_i386_tpoff (info, relocation);
4513 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4514 because such sections are not SEC_ALLOC and thus ld.so will
4515 not process them. */
4516 if (unresolved_reloc
4517 && !((input_section->flags & SEC_DEBUGGING) != 0
4519 && _bfd_elf_section_offset (output_bfd, info, input_section,
4520 rel->r_offset) != (bfd_vma) -1)
4522 (*_bfd_error_handler)
4523 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4526 (long) rel->r_offset,
4528 h->root.root.string);
4533 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4534 contents, rel->r_offset,
4537 check_relocation_error:
4538 if (r != bfd_reloc_ok)
4543 name = h->root.root.string;
4546 name = bfd_elf_string_from_elf_section (input_bfd,
4547 symtab_hdr->sh_link,
4552 name = bfd_section_name (input_bfd, sec);
4555 if (r == bfd_reloc_overflow)
4557 if (! ((*info->callbacks->reloc_overflow)
4558 (info, (h ? &h->root : NULL), name, howto->name,
4559 (bfd_vma) 0, input_bfd, input_section,
4565 (*_bfd_error_handler)
4566 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4567 input_bfd, input_section,
4568 (long) rel->r_offset, name, (int) r);
4577 /* Finish up dynamic symbol handling. We set the contents of various
4578 dynamic sections here. */
4581 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4582 struct bfd_link_info *info,
4583 struct elf_link_hash_entry *h,
4584 Elf_Internal_Sym *sym)
4586 struct elf_i386_link_hash_table *htab;
4587 unsigned plt_entry_size;
4588 const struct elf_i386_backend_data *abed;
4589 struct elf_i386_link_hash_entry *eh;
4591 htab = elf_i386_hash_table (info);
4595 abed = get_elf_i386_backend_data (output_bfd);
4596 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
4598 eh = (struct elf_i386_link_hash_entry *) h;
4600 if (h->plt.offset != (bfd_vma) -1)
4604 Elf_Internal_Rela rel;
4606 asection *plt, *gotplt, *relplt;
4608 /* When building a static executable, use .iplt, .igot.plt and
4609 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4610 if (htab->elf.splt != NULL)
4612 plt = htab->elf.splt;
4613 gotplt = htab->elf.sgotplt;
4614 relplt = htab->elf.srelplt;
4618 plt = htab->elf.iplt;
4619 gotplt = htab->elf.igotplt;
4620 relplt = htab->elf.irelplt;
4623 /* This symbol has an entry in the procedure linkage table. Set
4626 if ((h->dynindx == -1
4627 && !((h->forced_local || info->executable)
4629 && h->type == STT_GNU_IFUNC))
4635 /* Get the index in the procedure linkage table which
4636 corresponds to this symbol. This is the index of this symbol
4637 in all the symbols for which we are making plt entries. The
4638 first entry in the procedure linkage table is reserved.
4640 Get the offset into the .got table of the entry that
4641 corresponds to this function. Each .got entry is 4 bytes.
4642 The first three are reserved.
4644 For static executables, we don't reserve anything. */
4646 if (plt == htab->elf.splt)
4648 got_offset = h->plt.offset / plt_entry_size - 1;
4649 got_offset = (got_offset + 3) * 4;
4653 got_offset = h->plt.offset / plt_entry_size;
4654 got_offset = got_offset * 4;
4657 /* Fill in the entry in the procedure linkage table. */
4660 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
4661 abed->plt->plt_entry_size);
4662 bfd_put_32 (output_bfd,
4663 (gotplt->output_section->vma
4664 + gotplt->output_offset
4666 plt->contents + h->plt.offset
4667 + abed->plt->plt_got_offset);
4669 if (abed->is_vxworks)
4671 int s, k, reloc_index;
4673 /* Create the R_386_32 relocation referencing the GOT
4674 for this PLT entry. */
4676 /* S: Current slot number (zero-based). */
4677 s = ((h->plt.offset - abed->plt->plt_entry_size)
4678 / abed->plt->plt_entry_size);
4679 /* K: Number of relocations for PLTResolve. */
4681 k = PLTRESOLVE_RELOCS_SHLIB;
4683 k = PLTRESOLVE_RELOCS;
4684 /* Skip the PLTresolve relocations, and the relocations for
4685 the other PLT slots. */
4686 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4687 loc = (htab->srelplt2->contents + reloc_index
4688 * sizeof (Elf32_External_Rel));
4690 rel.r_offset = (htab->elf.splt->output_section->vma
4691 + htab->elf.splt->output_offset
4692 + h->plt.offset + 2),
4693 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4694 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4696 /* Create the R_386_32 relocation referencing the beginning of
4697 the PLT for this GOT entry. */
4698 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4699 + htab->elf.sgotplt->output_offset
4701 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4702 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4703 loc + sizeof (Elf32_External_Rel));
4708 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
4709 abed->plt->plt_entry_size);
4710 bfd_put_32 (output_bfd, got_offset,
4711 plt->contents + h->plt.offset
4712 + abed->plt->plt_got_offset);
4715 /* Fill in the entry in the global offset table. */
4716 bfd_put_32 (output_bfd,
4717 (plt->output_section->vma
4718 + plt->output_offset
4720 + abed->plt->plt_lazy_offset),
4721 gotplt->contents + got_offset);
4723 /* Fill in the entry in the .rel.plt section. */
4724 rel.r_offset = (gotplt->output_section->vma
4725 + gotplt->output_offset
4727 if (h->dynindx == -1
4728 || ((info->executable
4729 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4731 && h->type == STT_GNU_IFUNC))
4733 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4734 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4735 in the .got.plt section. */
4736 bfd_put_32 (output_bfd,
4737 (h->root.u.def.value
4738 + h->root.u.def.section->output_section->vma
4739 + h->root.u.def.section->output_offset),
4740 gotplt->contents + got_offset);
4741 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4742 /* R_386_IRELATIVE comes last. */
4743 plt_index = htab->next_irelative_index--;
4747 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4748 plt_index = htab->next_jump_slot_index++;
4750 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4751 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4753 /* Don't fill PLT entry for static executables. */
4754 if (plt == htab->elf.splt)
4756 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4757 plt->contents + h->plt.offset
4758 + abed->plt->plt_reloc_offset);
4759 bfd_put_32 (output_bfd, - (h->plt.offset
4760 + abed->plt->plt_plt_offset + 4),
4761 plt->contents + h->plt.offset
4762 + abed->plt->plt_plt_offset);
4765 else if (eh->plt_got.offset != (bfd_vma) -1)
4767 bfd_vma got_offset, plt_offset;
4768 asection *plt, *got, *gotplt;
4769 const bfd_byte *got_plt_entry;
4771 /* Offset of displacement of the indirect jump. */
4772 bfd_vma plt_got_offset = 2;
4774 /* Set the entry in the GOT procedure linkage table. */
4775 plt = htab->plt_got;
4776 got = htab->elf.sgot;
4777 gotplt = htab->elf.sgotplt;
4778 got_offset = h->got.offset;
4780 if (got_offset == (bfd_vma) -1
4786 /* Fill in the entry in the GOT procedure linkage table. */
4789 got_plt_entry = elf_i386_got_plt_entry;
4790 got_offset += got->output_section->vma + got->output_offset;
4794 got_plt_entry = elf_i386_pic_got_plt_entry;
4795 got_offset += (got->output_section->vma
4796 + got->output_offset
4797 - gotplt->output_section->vma
4798 - gotplt->output_offset);
4801 plt_offset = eh->plt_got.offset;
4802 memcpy (plt->contents + plt_offset, got_plt_entry,
4803 sizeof (elf_i386_got_plt_entry));
4804 bfd_put_32 (output_bfd, got_offset,
4805 plt->contents + plt_offset + plt_got_offset);
4809 && (h->plt.offset != (bfd_vma) -1
4810 || eh->plt_got.offset != (bfd_vma) -1))
4812 /* Mark the symbol as undefined, rather than as defined in
4813 the .plt section. Leave the value if there were any
4814 relocations where pointer equality matters (this is a clue
4815 for the dynamic linker, to make function pointer
4816 comparisons work between an application and shared
4817 library), otherwise set it to zero. If a function is only
4818 called from a binary, there is no need to slow down
4819 shared libraries because of that. */
4820 sym->st_shndx = SHN_UNDEF;
4821 if (!h->pointer_equality_needed)
4825 if (h->got.offset != (bfd_vma) -1
4826 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4827 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4829 Elf_Internal_Rela rel;
4831 /* This symbol has an entry in the global offset table. Set it
4834 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4837 rel.r_offset = (htab->elf.sgot->output_section->vma
4838 + htab->elf.sgot->output_offset
4839 + (h->got.offset & ~(bfd_vma) 1));
4841 /* If this is a static link, or it is a -Bsymbolic link and the
4842 symbol is defined locally or was forced to be local because
4843 of a version file, we just want to emit a RELATIVE reloc.
4844 The entry in the global offset table will already have been
4845 initialized in the relocate_section function. */
4847 && h->type == STT_GNU_IFUNC)
4851 /* Generate R_386_GLOB_DAT. */
4858 if (!h->pointer_equality_needed)
4861 /* For non-shared object, we can't use .got.plt, which
4862 contains the real function addres if we need pointer
4863 equality. We load the GOT entry with the PLT entry. */
4864 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4865 bfd_put_32 (output_bfd,
4866 (plt->output_section->vma
4867 + plt->output_offset + h->plt.offset),
4868 htab->elf.sgot->contents + h->got.offset);
4872 else if (info->shared
4873 && SYMBOL_REFERENCES_LOCAL (info, h))
4875 BFD_ASSERT((h->got.offset & 1) != 0);
4876 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4880 BFD_ASSERT((h->got.offset & 1) == 0);
4882 bfd_put_32 (output_bfd, (bfd_vma) 0,
4883 htab->elf.sgot->contents + h->got.offset);
4884 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4887 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
4892 Elf_Internal_Rela rel;
4894 /* This symbol needs a copy reloc. Set it up. */
4896 if (h->dynindx == -1
4897 || (h->root.type != bfd_link_hash_defined
4898 && h->root.type != bfd_link_hash_defweak)
4899 || htab->srelbss == NULL)
4902 rel.r_offset = (h->root.u.def.value
4903 + h->root.u.def.section->output_section->vma
4904 + h->root.u.def.section->output_offset);
4905 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4906 elf_append_rel (output_bfd, htab->srelbss, &rel);
4912 /* Finish up local dynamic symbol handling. We set the contents of
4913 various dynamic sections here. */
4916 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4918 struct elf_link_hash_entry *h
4919 = (struct elf_link_hash_entry *) *slot;
4920 struct bfd_link_info *info
4921 = (struct bfd_link_info *) inf;
4923 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4927 /* Used to decide how to sort relocs in an optimal manner for the
4928 dynamic linker, before writing them out. */
4930 static enum elf_reloc_type_class
4931 elf_i386_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4932 const asection *rel_sec ATTRIBUTE_UNUSED,
4933 const Elf_Internal_Rela *rela)
4935 switch (ELF32_R_TYPE (rela->r_info))
4937 case R_386_RELATIVE:
4938 return reloc_class_relative;
4939 case R_386_JUMP_SLOT:
4940 return reloc_class_plt;
4942 return reloc_class_copy;
4944 return reloc_class_normal;
4948 /* Finish up the dynamic sections. */
4951 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4952 struct bfd_link_info *info)
4954 struct elf_i386_link_hash_table *htab;
4957 const struct elf_i386_backend_data *abed;
4959 htab = elf_i386_hash_table (info);
4963 dynobj = htab->elf.dynobj;
4964 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4965 abed = get_elf_i386_backend_data (output_bfd);
4967 if (htab->elf.dynamic_sections_created)
4969 Elf32_External_Dyn *dyncon, *dynconend;
4971 if (sdyn == NULL || htab->elf.sgot == NULL)
4974 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4975 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4976 for (; dyncon < dynconend; dyncon++)
4978 Elf_Internal_Dyn dyn;
4981 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4986 if (abed->is_vxworks
4987 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4992 s = htab->elf.sgotplt;
4993 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4997 s = htab->elf.srelplt;
4998 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5002 s = htab->elf.srelplt;
5003 dyn.d_un.d_val = s->size;
5007 /* My reading of the SVR4 ABI indicates that the
5008 procedure linkage table relocs (DT_JMPREL) should be
5009 included in the overall relocs (DT_REL). This is
5010 what Solaris does. However, UnixWare can not handle
5011 that case. Therefore, we override the DT_RELSZ entry
5012 here to make it not include the JMPREL relocs. */
5013 s = htab->elf.srelplt;
5016 dyn.d_un.d_val -= s->size;
5020 /* We may not be using the standard ELF linker script.
5021 If .rel.plt is the first .rel section, we adjust
5022 DT_REL to not include it. */
5023 s = htab->elf.srelplt;
5026 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
5028 dyn.d_un.d_ptr += s->size;
5032 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5035 /* Fill in the first entry in the procedure linkage table. */
5036 if (htab->elf.splt && htab->elf.splt->size > 0)
5040 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5041 abed->plt->plt0_entry_size);
5042 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5043 abed->plt0_pad_byte,
5044 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5048 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5049 abed->plt->plt0_entry_size);
5050 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5051 abed->plt0_pad_byte,
5052 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5053 bfd_put_32 (output_bfd,
5054 (htab->elf.sgotplt->output_section->vma
5055 + htab->elf.sgotplt->output_offset
5057 htab->elf.splt->contents
5058 + abed->plt->plt0_got1_offset);
5059 bfd_put_32 (output_bfd,
5060 (htab->elf.sgotplt->output_section->vma
5061 + htab->elf.sgotplt->output_offset
5063 htab->elf.splt->contents
5064 + abed->plt->plt0_got2_offset);
5066 if (abed->is_vxworks)
5068 Elf_Internal_Rela rel;
5070 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5071 On IA32 we use REL relocations so the addend goes in
5072 the PLT directly. */
5073 rel.r_offset = (htab->elf.splt->output_section->vma
5074 + htab->elf.splt->output_offset
5075 + abed->plt->plt0_got1_offset);
5076 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5077 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5078 htab->srelplt2->contents);
5079 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5080 rel.r_offset = (htab->elf.splt->output_section->vma
5081 + htab->elf.splt->output_offset
5082 + abed->plt->plt0_got2_offset);
5083 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5084 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5085 htab->srelplt2->contents +
5086 sizeof (Elf32_External_Rel));
5090 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5091 really seem like the right value. */
5092 elf_section_data (htab->elf.splt->output_section)
5093 ->this_hdr.sh_entsize = 4;
5095 /* Correct the .rel.plt.unloaded relocations. */
5096 if (abed->is_vxworks && !info->shared)
5098 int num_plts = (htab->elf.splt->size
5099 / abed->plt->plt_entry_size) - 1;
5102 p = htab->srelplt2->contents;
5104 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5106 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5108 for (; num_plts; num_plts--)
5110 Elf_Internal_Rela rel;
5111 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5112 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5113 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5114 p += sizeof (Elf32_External_Rel);
5116 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5117 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5118 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5119 p += sizeof (Elf32_External_Rel);
5125 if (htab->elf.sgotplt)
5127 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5129 (*_bfd_error_handler)
5130 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5134 /* Fill in the first three entries in the global offset table. */
5135 if (htab->elf.sgotplt->size > 0)
5137 bfd_put_32 (output_bfd,
5139 : sdyn->output_section->vma + sdyn->output_offset),
5140 htab->elf.sgotplt->contents);
5141 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5142 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5145 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5148 /* Adjust .eh_frame for .plt section. */
5149 if (htab->plt_eh_frame != NULL
5150 && htab->plt_eh_frame->contents != NULL)
5152 if (htab->elf.splt != NULL
5153 && htab->elf.splt->size != 0
5154 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5155 && htab->elf.splt->output_section != NULL
5156 && htab->plt_eh_frame->output_section != NULL)
5158 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5159 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5160 + htab->plt_eh_frame->output_offset
5161 + PLT_FDE_START_OFFSET;
5162 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5163 htab->plt_eh_frame->contents
5164 + PLT_FDE_START_OFFSET);
5166 if (htab->plt_eh_frame->sec_info_type
5167 == SEC_INFO_TYPE_EH_FRAME)
5169 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5171 htab->plt_eh_frame->contents))
5176 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5177 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5179 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5180 htab_traverse (htab->loc_hash_table,
5181 elf_i386_finish_local_dynamic_symbol,
5187 /* Return an array of PLT entry symbol values. */
5190 elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5193 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5196 bfd_vma *plt_sym_val;
5198 bfd_byte *plt_contents;
5199 const struct elf_i386_backend_data *bed
5200 = get_elf_i386_backend_data (abfd);
5201 Elf_Internal_Shdr *hdr;
5203 /* Get the .plt section contents. */
5204 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5205 if (plt_contents == NULL)
5207 if (!bfd_get_section_contents (abfd, (asection *) plt,
5208 plt_contents, 0, plt->size))
5211 free (plt_contents);
5215 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5216 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5219 hdr = &elf_section_data (relplt)->this_hdr;
5220 count = relplt->size / hdr->sh_entsize;
5222 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5223 if (plt_sym_val == NULL)
5226 for (i = 0; i < count; i++)
5227 plt_sym_val[i] = -1;
5229 plt_offset = bed->plt->plt_entry_size;
5230 p = relplt->relocation;
5231 for (i = 0; i < count; i++, p++)
5235 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5236 if (p->howto == NULL)
5239 if (p->howto->type != R_386_JUMP_SLOT
5240 && p->howto->type != R_386_IRELATIVE)
5243 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5244 + bed->plt->plt_reloc_offset));
5245 reloc_index /= sizeof (Elf32_External_Rel);
5246 if (reloc_index >= count)
5248 plt_sym_val[reloc_index] = plt->vma + plt_offset;
5249 plt_offset += bed->plt->plt_entry_size;
5252 free (plt_contents);
5257 /* Similar to _bfd_elf_get_synthetic_symtab. */
5260 elf_i386_get_synthetic_symtab (bfd *abfd,
5267 asection *plt = bfd_get_section_by_name (abfd, ".plt");
5268 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5269 dynsymcount, dynsyms, ret,
5271 elf_i386_get_plt_sym_val);
5274 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5277 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5279 if (h->plt.offset != (bfd_vma) -1
5281 && !h->pointer_equality_needed)
5284 return _bfd_elf_hash_symbol (h);
5287 /* Hook called by the linker routine which adds symbols from an object
5291 elf_i386_add_symbol_hook (bfd * abfd,
5292 struct bfd_link_info * info,
5293 Elf_Internal_Sym * sym,
5294 const char ** namep ATTRIBUTE_UNUSED,
5295 flagword * flagsp ATTRIBUTE_UNUSED,
5296 asection ** secp ATTRIBUTE_UNUSED,
5297 bfd_vma * valp ATTRIBUTE_UNUSED)
5299 if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
5300 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)
5301 && (abfd->flags & DYNAMIC) == 0
5302 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
5303 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
5308 #define TARGET_LITTLE_SYM i386_elf32_vec
5309 #define TARGET_LITTLE_NAME "elf32-i386"
5310 #define ELF_ARCH bfd_arch_i386
5311 #define ELF_TARGET_ID I386_ELF_DATA
5312 #define ELF_MACHINE_CODE EM_386
5313 #define ELF_MAXPAGESIZE 0x1000
5315 #define elf_backend_can_gc_sections 1
5316 #define elf_backend_can_refcount 1
5317 #define elf_backend_want_got_plt 1
5318 #define elf_backend_plt_readonly 1
5319 #define elf_backend_want_plt_sym 0
5320 #define elf_backend_got_header_size 12
5321 #define elf_backend_plt_alignment 4
5322 #define elf_backend_extern_protected_data 1
5324 /* Support RELA for objdump of prelink objects. */
5325 #define elf_info_to_howto elf_i386_info_to_howto_rel
5326 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5328 #define bfd_elf32_mkobject elf_i386_mkobject
5330 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5331 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5332 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5333 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5334 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5336 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5337 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5338 #define elf_backend_check_relocs elf_i386_check_relocs
5339 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5340 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5341 #define elf_backend_fake_sections elf_i386_fake_sections
5342 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5343 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5344 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5345 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5346 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5347 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5348 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5349 #define elf_backend_relocate_section elf_i386_relocate_section
5350 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5351 #define elf_backend_always_size_sections elf_i386_always_size_sections
5352 #define elf_backend_omit_section_dynsym \
5353 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5354 #define elf_backend_hash_symbol elf_i386_hash_symbol
5355 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5357 #include "elf32-target.h"
5359 /* FreeBSD support. */
5361 #undef TARGET_LITTLE_SYM
5362 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5363 #undef TARGET_LITTLE_NAME
5364 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5366 #define ELF_OSABI ELFOSABI_FREEBSD
5368 /* The kernel recognizes executables as valid only if they carry a
5369 "FreeBSD" label in the ELF header. So we put this label on all
5370 executables and (for simplicity) also all other object files. */
5373 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5375 _bfd_elf_post_process_headers (abfd, info);
5377 #ifdef OLD_FREEBSD_ABI_LABEL
5379 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5380 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5381 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5386 #undef elf_backend_post_process_headers
5387 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5389 #define elf32_bed elf32_i386_fbsd_bed
5391 #undef elf_backend_add_symbol_hook
5393 #include "elf32-target.h"
5397 #undef TARGET_LITTLE_SYM
5398 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5399 #undef TARGET_LITTLE_NAME
5400 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5402 #undef elf_backend_post_process_headers
5404 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5405 objects won't be recognized. */
5409 #define elf32_bed elf32_i386_sol2_bed
5411 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5413 #undef elf_backend_static_tls_alignment
5414 #define elf_backend_static_tls_alignment 8
5416 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5418 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5420 #undef elf_backend_want_plt_sym
5421 #define elf_backend_want_plt_sym 1
5423 #include "elf32-target.h"
5425 /* Native Client support. */
5427 #undef TARGET_LITTLE_SYM
5428 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5429 #undef TARGET_LITTLE_NAME
5430 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5432 #define elf32_bed elf32_i386_nacl_bed
5434 #undef ELF_MAXPAGESIZE
5435 #define ELF_MAXPAGESIZE 0x10000
5437 /* Restore defaults. */
5439 #undef elf_backend_want_plt_sym
5440 #define elf_backend_want_plt_sym 0
5441 #undef elf_backend_post_process_headers
5442 #undef elf_backend_static_tls_alignment
5444 /* NaCl uses substantially different PLT entries for the same effects. */
5446 #undef elf_backend_plt_alignment
5447 #define elf_backend_plt_alignment 5
5448 #define NACL_PLT_ENTRY_SIZE 64
5449 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5451 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5453 0xff, 0x35, /* pushl contents of address */
5454 0, 0, 0, 0, /* replaced with address of .got + 4. */
5455 0x8b, 0x0d, /* movl contents of address, %ecx */
5456 0, 0, 0, 0, /* replaced with address of .got + 8. */
5457 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5458 0xff, 0xe1 /* jmp *%ecx */
5461 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5463 0x8b, 0x0d, /* movl contents of address, %ecx */
5464 0, 0, 0, 0, /* replaced with GOT slot address. */
5465 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5466 0xff, 0xe1, /* jmp *%ecx */
5468 /* Pad to the next 32-byte boundary with nop instructions. */
5470 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5471 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5473 /* Lazy GOT entries point here (32-byte aligned). */
5474 0x68, /* pushl immediate */
5475 0, 0, 0, 0, /* replaced with reloc offset. */
5476 0xe9, /* jmp relative */
5477 0, 0, 0, 0, /* replaced with offset to .plt. */
5479 /* Pad to the next 32-byte boundary with nop instructions. */
5480 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5481 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5485 static const bfd_byte
5486 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5488 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5489 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5490 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5491 0xff, 0xe1, /* jmp *%ecx */
5493 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5494 so pad to that size with nop instructions. */
5495 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5498 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5500 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5501 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5502 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5503 0xff, 0xe1, /* jmp *%ecx */
5505 /* Pad to the next 32-byte boundary with nop instructions. */
5507 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5508 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5510 /* Lazy GOT entries point here (32-byte aligned). */
5511 0x68, /* pushl immediate */
5512 0, 0, 0, 0, /* replaced with offset into relocation table. */
5513 0xe9, /* jmp relative */
5514 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5516 /* Pad to the next 32-byte boundary with nop instructions. */
5517 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5518 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5522 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5524 #if (PLT_CIE_LENGTH != 20 \
5525 || PLT_FDE_LENGTH != 36 \
5526 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5527 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5528 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5530 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5531 0, 0, 0, 0, /* CIE ID */
5532 1, /* CIE version */
5533 'z', 'R', 0, /* Augmentation string */
5534 1, /* Code alignment factor */
5535 0x7c, /* Data alignment factor: -4 */
5536 8, /* Return address column */
5537 1, /* Augmentation size */
5538 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5539 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5540 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5541 DW_CFA_nop, DW_CFA_nop,
5543 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5544 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5545 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5546 0, 0, 0, 0, /* .plt size goes here */
5547 0, /* Augmentation size */
5548 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5549 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5550 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5551 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5552 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5553 13, /* Block length */
5554 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5555 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5556 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5557 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5558 DW_CFA_nop, DW_CFA_nop
5561 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
5563 elf_i386_nacl_plt0_entry, /* plt0_entry */
5564 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5565 2, /* plt0_got1_offset */
5566 8, /* plt0_got2_offset */
5567 elf_i386_nacl_plt_entry, /* plt_entry */
5568 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5569 2, /* plt_got_offset */
5570 33, /* plt_reloc_offset */
5571 38, /* plt_plt_offset */
5572 32, /* plt_lazy_offset */
5573 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5574 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5575 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5576 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
5579 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5581 &elf_i386_nacl_plt, /* plt */
5582 0x90, /* plt0_pad_byte: nop insn */
5587 elf32_i386_nacl_elf_object_p (bfd *abfd)
5589 /* Set the right machine number for a NaCl i386 ELF32 file. */
5590 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
5594 #undef elf_backend_arch_data
5595 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5597 #undef elf_backend_object_p
5598 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5599 #undef elf_backend_modify_segment_map
5600 #define elf_backend_modify_segment_map nacl_modify_segment_map
5601 #undef elf_backend_modify_program_headers
5602 #define elf_backend_modify_program_headers nacl_modify_program_headers
5603 #undef elf_backend_final_write_processing
5604 #define elf_backend_final_write_processing nacl_final_write_processing
5606 #include "elf32-target.h"
5608 /* Restore defaults. */
5609 #undef elf_backend_object_p
5610 #undef elf_backend_modify_segment_map
5611 #undef elf_backend_modify_program_headers
5612 #undef elf_backend_final_write_processing
5614 /* VxWorks support. */
5616 #undef TARGET_LITTLE_SYM
5617 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5618 #undef TARGET_LITTLE_NAME
5619 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5621 #undef elf_backend_plt_alignment
5622 #define elf_backend_plt_alignment 4
5624 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5626 &elf_i386_plt, /* plt */
5627 0x90, /* plt0_pad_byte */
5631 #undef elf_backend_arch_data
5632 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5634 #undef elf_backend_relocs_compatible
5635 #undef elf_backend_add_symbol_hook
5636 #define elf_backend_add_symbol_hook \
5637 elf_vxworks_add_symbol_hook
5638 #undef elf_backend_link_output_symbol_hook
5639 #define elf_backend_link_output_symbol_hook \
5640 elf_vxworks_link_output_symbol_hook
5641 #undef elf_backend_emit_relocs
5642 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5643 #undef elf_backend_final_write_processing
5644 #define elf_backend_final_write_processing \
5645 elf_vxworks_final_write_processing
5646 #undef elf_backend_static_tls_alignment
5648 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5650 #undef elf_backend_want_plt_sym
5651 #define elf_backend_want_plt_sym 1
5654 #define elf32_bed elf32_i386_vxworks_bed
5656 #include "elf32-target.h"