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_ext2 (R_386_IRELATIVE + 1 - R_386_tls_offset)
152 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
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_ext2 - R_386_ext)
375 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
376 >= R_386_vt - R_386_ext2))
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 /* Reference count of C/C++ function pointer relocations in read-write
763 section which can be resolved at run-time. */
764 bfd_signed_vma func_pointer_refcount;
766 /* Information about the GOT PLT entry. Filled when there are both
767 GOT and PLT relocations against the same function. */
768 union gotplt_union plt_got;
770 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
771 starting at the end of the jump table. */
775 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
777 struct elf_i386_obj_tdata
779 struct elf_obj_tdata root;
781 /* tls_type for each local got entry. */
782 char *local_got_tls_type;
784 /* GOTPLT entries for TLS descriptors. */
785 bfd_vma *local_tlsdesc_gotent;
788 #define elf_i386_tdata(abfd) \
789 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
791 #define elf_i386_local_got_tls_type(abfd) \
792 (elf_i386_tdata (abfd)->local_got_tls_type)
794 #define elf_i386_local_tlsdesc_gotent(abfd) \
795 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
797 #define is_i386_elf(bfd) \
798 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
799 && elf_tdata (bfd) != NULL \
800 && elf_object_id (bfd) == I386_ELF_DATA)
803 elf_i386_mkobject (bfd *abfd)
805 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
809 /* i386 ELF linker hash table. */
811 struct elf_i386_link_hash_table
813 struct elf_link_hash_table elf;
815 /* Short-cuts to get to dynamic linker sections. */
818 asection *plt_eh_frame;
823 bfd_signed_vma refcount;
827 /* The amount of space used by the reserved portion of the sgotplt
828 section, plus whatever space is used by the jump slots. */
829 bfd_vma sgotplt_jump_table_size;
831 /* Small local sym cache. */
832 struct sym_cache sym_cache;
834 /* _TLS_MODULE_BASE_ symbol. */
835 struct bfd_link_hash_entry *tls_module_base;
837 /* Used by local STT_GNU_IFUNC symbols. */
838 htab_t loc_hash_table;
839 void * loc_hash_memory;
841 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
844 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
845 bfd_vma next_tls_desc_index;
847 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
848 bfd_vma next_jump_slot_index;
850 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
851 bfd_vma next_irelative_index;
854 /* Get the i386 ELF linker hash table from a link_info structure. */
856 #define elf_i386_hash_table(p) \
857 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
858 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
860 #define elf_i386_compute_jump_table_size(htab) \
861 ((htab)->elf.srelplt->reloc_count * 4)
863 /* Create an entry in an i386 ELF linker hash table. */
865 static struct bfd_hash_entry *
866 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
867 struct bfd_hash_table *table,
870 /* Allocate the structure if it has not already been allocated by a
874 entry = (struct bfd_hash_entry *)
875 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
880 /* Call the allocation method of the superclass. */
881 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
884 struct elf_i386_link_hash_entry *eh;
886 eh = (struct elf_i386_link_hash_entry *) entry;
887 eh->dyn_relocs = NULL;
888 eh->tls_type = GOT_UNKNOWN;
890 eh->func_pointer_refcount = 0;
891 eh->plt_got.offset = (bfd_vma) -1;
892 eh->tlsdesc_got = (bfd_vma) -1;
898 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
899 for local symbol so that we can handle local STT_GNU_IFUNC symbols
900 as global symbol. We reuse indx and dynstr_index for local symbol
901 hash since they aren't used by global symbols in this backend. */
904 elf_i386_local_htab_hash (const void *ptr)
906 struct elf_link_hash_entry *h
907 = (struct elf_link_hash_entry *) ptr;
908 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
911 /* Compare local hash entries. */
914 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
916 struct elf_link_hash_entry *h1
917 = (struct elf_link_hash_entry *) ptr1;
918 struct elf_link_hash_entry *h2
919 = (struct elf_link_hash_entry *) ptr2;
921 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
924 /* Find and/or create a hash entry for local symbol. */
926 static struct elf_link_hash_entry *
927 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
928 bfd *abfd, const Elf_Internal_Rela *rel,
931 struct elf_i386_link_hash_entry e, *ret;
932 asection *sec = abfd->sections;
933 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
934 ELF32_R_SYM (rel->r_info));
937 e.elf.indx = sec->id;
938 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
939 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
940 create ? INSERT : NO_INSERT);
947 ret = (struct elf_i386_link_hash_entry *) *slot;
951 ret = (struct elf_i386_link_hash_entry *)
952 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
953 sizeof (struct elf_i386_link_hash_entry));
956 memset (ret, 0, sizeof (*ret));
957 ret->elf.indx = sec->id;
958 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
959 ret->elf.dynindx = -1;
960 ret->func_pointer_refcount = 0;
961 ret->plt_got.offset = (bfd_vma) -1;
967 /* Destroy an i386 ELF linker hash table. */
970 elf_i386_link_hash_table_free (bfd *obfd)
972 struct elf_i386_link_hash_table *htab
973 = (struct elf_i386_link_hash_table *) obfd->link.hash;
975 if (htab->loc_hash_table)
976 htab_delete (htab->loc_hash_table);
977 if (htab->loc_hash_memory)
978 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
979 _bfd_elf_link_hash_table_free (obfd);
982 /* Create an i386 ELF linker hash table. */
984 static struct bfd_link_hash_table *
985 elf_i386_link_hash_table_create (bfd *abfd)
987 struct elf_i386_link_hash_table *ret;
988 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
990 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
994 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
995 elf_i386_link_hash_newfunc,
996 sizeof (struct elf_i386_link_hash_entry),
1003 ret->loc_hash_table = htab_try_create (1024,
1004 elf_i386_local_htab_hash,
1005 elf_i386_local_htab_eq,
1007 ret->loc_hash_memory = objalloc_create ();
1008 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1010 elf_i386_link_hash_table_free (abfd);
1013 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1015 return &ret->elf.root;
1018 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1019 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1023 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1025 struct elf_i386_link_hash_table *htab;
1027 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1030 htab = elf_i386_hash_table (info);
1034 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1038 if (bfd_link_executable (info))
1040 /* Always allow copy relocs for building executables. */
1041 asection *s = bfd_get_linker_section (dynobj, ".rel.bss");
1044 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1045 s = bfd_make_section_anyway_with_flags (dynobj,
1047 (bed->dynamic_sec_flags
1050 || ! bfd_set_section_alignment (dynobj, s,
1051 bed->s->log_file_align))
1057 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1058 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1062 if (!info->no_ld_generated_unwind_info
1063 && htab->plt_eh_frame == NULL
1064 && htab->elf.splt != NULL)
1066 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1067 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1068 | SEC_LINKER_CREATED);
1070 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1071 if (htab->plt_eh_frame == NULL
1072 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1079 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1082 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1083 struct elf_link_hash_entry *dir,
1084 struct elf_link_hash_entry *ind)
1086 struct elf_i386_link_hash_entry *edir, *eind;
1088 edir = (struct elf_i386_link_hash_entry *) dir;
1089 eind = (struct elf_i386_link_hash_entry *) ind;
1091 if (eind->dyn_relocs != NULL)
1093 if (edir->dyn_relocs != NULL)
1095 struct elf_dyn_relocs **pp;
1096 struct elf_dyn_relocs *p;
1098 /* Add reloc counts against the indirect sym to the direct sym
1099 list. Merge any entries against the same section. */
1100 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1102 struct elf_dyn_relocs *q;
1104 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1105 if (q->sec == p->sec)
1107 q->pc_count += p->pc_count;
1108 q->count += p->count;
1115 *pp = edir->dyn_relocs;
1118 edir->dyn_relocs = eind->dyn_relocs;
1119 eind->dyn_relocs = NULL;
1122 if (ind->root.type == bfd_link_hash_indirect
1123 && dir->got.refcount <= 0)
1125 edir->tls_type = eind->tls_type;
1126 eind->tls_type = GOT_UNKNOWN;
1129 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1130 generate a R_386_COPY reloc. */
1131 edir->gotoff_ref |= eind->gotoff_ref;
1133 if (ELIMINATE_COPY_RELOCS
1134 && ind->root.type != bfd_link_hash_indirect
1135 && dir->dynamic_adjusted)
1137 /* If called to transfer flags for a weakdef during processing
1138 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1139 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1140 dir->ref_dynamic |= ind->ref_dynamic;
1141 dir->ref_regular |= ind->ref_regular;
1142 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1143 dir->needs_plt |= ind->needs_plt;
1144 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1148 if (eind->func_pointer_refcount > 0)
1150 edir->func_pointer_refcount += eind->func_pointer_refcount;
1151 eind->func_pointer_refcount = 0;
1154 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1158 /* Return TRUE if the TLS access code sequence support transition
1162 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1164 Elf_Internal_Shdr *symtab_hdr,
1165 struct elf_link_hash_entry **sym_hashes,
1166 unsigned int r_type,
1167 const Elf_Internal_Rela *rel,
1168 const Elf_Internal_Rela *relend)
1170 unsigned int val, type;
1171 unsigned long r_symndx;
1172 struct elf_link_hash_entry *h;
1175 /* Get the section contents. */
1176 if (contents == NULL)
1178 if (elf_section_data (sec)->this_hdr.contents != NULL)
1179 contents = elf_section_data (sec)->this_hdr.contents;
1182 /* FIXME: How to better handle error condition? */
1183 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1186 /* Cache the section contents for elf_link_input_bfd. */
1187 elf_section_data (sec)->this_hdr.contents = contents;
1191 offset = rel->r_offset;
1196 if (offset < 2 || (rel + 1) >= relend)
1199 type = bfd_get_8 (abfd, contents + offset - 2);
1200 if (r_type == R_386_TLS_GD)
1202 /* Check transition from GD access model. Only
1203 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1204 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1205 can transit to different access model. */
1206 if ((offset + 10) > sec->size ||
1207 (type != 0x8d && type != 0x04))
1210 val = bfd_get_8 (abfd, contents + offset - 1);
1213 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1217 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1220 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1225 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1226 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1229 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1235 /* Check transition from LD access model. Only
1236 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1237 can transit to different access model. */
1238 if (type != 0x8d || (offset + 9) > sec->size)
1241 val = bfd_get_8 (abfd, contents + offset - 1);
1242 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1246 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1249 r_symndx = ELF32_R_SYM (rel[1].r_info);
1250 if (r_symndx < symtab_hdr->sh_info)
1253 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1254 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1255 may be versioned. */
1257 && h->root.root.string != NULL
1258 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1259 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1260 && (strncmp (h->root.root.string, "___tls_get_addr",
1264 /* Check transition from IE access model:
1265 movl foo@indntpoff(%rip), %eax
1266 movl foo@indntpoff(%rip), %reg
1267 addl foo@indntpoff(%rip), %reg
1270 if (offset < 1 || (offset + 4) > sec->size)
1273 /* Check "movl foo@tpoff(%rip), %eax" first. */
1274 val = bfd_get_8 (abfd, contents + offset - 1);
1281 /* Check movl|addl foo@tpoff(%rip), %reg. */
1282 type = bfd_get_8 (abfd, contents + offset - 2);
1283 return ((type == 0x8b || type == 0x03)
1284 && (val & 0xc7) == 0x05);
1286 case R_386_TLS_GOTIE:
1287 case R_386_TLS_IE_32:
1288 /* Check transition from {IE_32,GOTIE} access model:
1289 subl foo@{tpoff,gontoff}(%reg1), %reg2
1290 movl foo@{tpoff,gontoff}(%reg1), %reg2
1291 addl foo@{tpoff,gontoff}(%reg1), %reg2
1294 if (offset < 2 || (offset + 4) > sec->size)
1297 val = bfd_get_8 (abfd, contents + offset - 1);
1298 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1301 type = bfd_get_8 (abfd, contents + offset - 2);
1302 return type == 0x8b || type == 0x2b || type == 0x03;
1304 case R_386_TLS_GOTDESC:
1305 /* Check transition from GDesc access model:
1306 leal x@tlsdesc(%ebx), %eax
1308 Make sure it's a leal adding ebx to a 32-bit offset
1309 into any register, although it's probably almost always
1312 if (offset < 2 || (offset + 4) > sec->size)
1315 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1318 val = bfd_get_8 (abfd, contents + offset - 1);
1319 return (val & 0xc7) == 0x83;
1321 case R_386_TLS_DESC_CALL:
1322 /* Check transition from GDesc access model:
1323 call *x@tlsdesc(%rax)
1325 if (offset + 2 <= sec->size)
1327 /* Make sure that it's a call *x@tlsdesc(%rax). */
1328 static const unsigned char call[] = { 0xff, 0x10 };
1329 return memcmp (contents + offset, call, 2) == 0;
1339 /* Return TRUE if the TLS access transition is OK or no transition
1340 will be performed. Update R_TYPE if there is a transition. */
1343 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1344 asection *sec, bfd_byte *contents,
1345 Elf_Internal_Shdr *symtab_hdr,
1346 struct elf_link_hash_entry **sym_hashes,
1347 unsigned int *r_type, int tls_type,
1348 const Elf_Internal_Rela *rel,
1349 const Elf_Internal_Rela *relend,
1350 struct elf_link_hash_entry *h,
1351 unsigned long r_symndx)
1353 unsigned int from_type = *r_type;
1354 unsigned int to_type = from_type;
1355 bfd_boolean check = TRUE;
1357 /* Skip TLS transition for functions. */
1359 && (h->type == STT_FUNC
1360 || h->type == STT_GNU_IFUNC))
1366 case R_386_TLS_GOTDESC:
1367 case R_386_TLS_DESC_CALL:
1368 case R_386_TLS_IE_32:
1370 case R_386_TLS_GOTIE:
1371 if (bfd_link_executable (info))
1374 to_type = R_386_TLS_LE_32;
1375 else if (from_type != R_386_TLS_IE
1376 && from_type != R_386_TLS_GOTIE)
1377 to_type = R_386_TLS_IE_32;
1380 /* When we are called from elf_i386_relocate_section, CONTENTS
1381 isn't NULL and there may be additional transitions based on
1383 if (contents != NULL)
1385 unsigned int new_to_type = to_type;
1387 if (bfd_link_executable (info)
1390 && (tls_type & GOT_TLS_IE))
1391 new_to_type = R_386_TLS_LE_32;
1393 if (to_type == R_386_TLS_GD
1394 || to_type == R_386_TLS_GOTDESC
1395 || to_type == R_386_TLS_DESC_CALL)
1397 if (tls_type == GOT_TLS_IE_POS)
1398 new_to_type = R_386_TLS_GOTIE;
1399 else if (tls_type & GOT_TLS_IE)
1400 new_to_type = R_386_TLS_IE_32;
1403 /* We checked the transition before when we were called from
1404 elf_i386_check_relocs. We only want to check the new
1405 transition which hasn't been checked before. */
1406 check = new_to_type != to_type && from_type == to_type;
1407 to_type = new_to_type;
1413 if (bfd_link_executable (info))
1414 to_type = R_386_TLS_LE_32;
1421 /* Return TRUE if there is no transition. */
1422 if (from_type == to_type)
1425 /* Check if the transition can be performed. */
1427 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1428 symtab_hdr, sym_hashes,
1429 from_type, rel, relend))
1431 reloc_howto_type *from, *to;
1434 from = elf_i386_rtype_to_howto (abfd, from_type);
1435 to = elf_i386_rtype_to_howto (abfd, to_type);
1438 name = h->root.root.string;
1441 struct elf_i386_link_hash_table *htab;
1443 htab = elf_i386_hash_table (info);
1448 Elf_Internal_Sym *isym;
1450 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1452 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1456 (*_bfd_error_handler)
1457 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1458 "in section `%A' failed"),
1459 abfd, sec, from->name, to->name, name,
1460 (unsigned long) rel->r_offset);
1461 bfd_set_error (bfd_error_bad_value);
1469 /* Rename some of the generic section flags to better document how they
1471 #define need_convert_mov_to_lea sec_flg0
1473 /* Look through the relocs for a section during the first phase, and
1474 calculate needed space in the global offset table, procedure linkage
1475 table, and dynamic reloc sections. */
1478 elf_i386_check_relocs (bfd *abfd,
1479 struct bfd_link_info *info,
1481 const Elf_Internal_Rela *relocs)
1483 struct elf_i386_link_hash_table *htab;
1484 Elf_Internal_Shdr *symtab_hdr;
1485 struct elf_link_hash_entry **sym_hashes;
1486 const Elf_Internal_Rela *rel;
1487 const Elf_Internal_Rela *rel_end;
1489 bfd_boolean use_plt_got;
1491 if (bfd_link_relocatable (info))
1494 BFD_ASSERT (is_i386_elf (abfd));
1496 htab = elf_i386_hash_table (info);
1500 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1501 && (get_elf_i386_backend_data (abfd)
1502 == &elf_i386_arch_bed));
1504 symtab_hdr = &elf_symtab_hdr (abfd);
1505 sym_hashes = elf_sym_hashes (abfd);
1509 rel_end = relocs + sec->reloc_count;
1510 for (rel = relocs; rel < rel_end; rel++)
1512 unsigned int r_type;
1513 unsigned long r_symndx;
1514 struct elf_link_hash_entry *h;
1515 struct elf_i386_link_hash_entry *eh;
1516 Elf_Internal_Sym *isym;
1518 bfd_boolean size_reloc;
1520 r_symndx = ELF32_R_SYM (rel->r_info);
1521 r_type = ELF32_R_TYPE (rel->r_info);
1523 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1525 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1531 if (r_symndx < symtab_hdr->sh_info)
1533 /* A local symbol. */
1534 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1539 /* Check relocation against local STT_GNU_IFUNC symbol. */
1540 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1542 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1546 /* Fake a STT_GNU_IFUNC symbol. */
1547 h->type = STT_GNU_IFUNC;
1550 h->forced_local = 1;
1551 h->root.type = bfd_link_hash_defined;
1559 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1560 while (h->root.type == bfd_link_hash_indirect
1561 || h->root.type == bfd_link_hash_warning)
1562 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1565 eh = (struct elf_i386_link_hash_entry *) h;
1568 /* Create the ifunc sections for static executables. If we
1569 never see an indirect function symbol nor we are building
1570 a static executable, those sections will be empty and
1571 won't appear in output. */
1583 if (htab->elf.dynobj == NULL)
1584 htab->elf.dynobj = abfd;
1585 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1590 /* It is referenced by a non-shared object. */
1592 h->root.non_ir_ref = 1;
1594 if (h->type == STT_GNU_IFUNC)
1595 elf_tdata (info->output_bfd)->has_gnu_symbols
1596 |= elf_gnu_symbol_ifunc;
1599 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1600 symtab_hdr, sym_hashes,
1601 &r_type, GOT_UNKNOWN,
1602 rel, rel_end, h, r_symndx))
1608 htab->tls_ldm_got.refcount += 1;
1612 /* This symbol requires a procedure linkage table entry. We
1613 actually build the entry in adjust_dynamic_symbol,
1614 because this might be a case of linking PIC code which is
1615 never referenced by a dynamic object, in which case we
1616 don't need to generate a procedure linkage table entry
1619 /* If this is a local symbol, we resolve it directly without
1620 creating a procedure linkage table entry. */
1625 h->plt.refcount += 1;
1632 case R_386_TLS_IE_32:
1634 case R_386_TLS_GOTIE:
1635 if (!bfd_link_executable (info))
1636 info->flags |= DF_STATIC_TLS;
1641 case R_386_TLS_GOTDESC:
1642 case R_386_TLS_DESC_CALL:
1643 /* This symbol requires a global offset table entry. */
1645 int tls_type, old_tls_type;
1650 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1651 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1652 case R_386_TLS_GOTDESC:
1653 case R_386_TLS_DESC_CALL:
1654 tls_type = GOT_TLS_GDESC; break;
1655 case R_386_TLS_IE_32:
1656 if (ELF32_R_TYPE (rel->r_info) == r_type)
1657 tls_type = GOT_TLS_IE_NEG;
1659 /* If this is a GD->IE transition, we may use either of
1660 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1661 tls_type = GOT_TLS_IE;
1664 case R_386_TLS_GOTIE:
1665 tls_type = GOT_TLS_IE_POS; break;
1670 h->got.refcount += 1;
1671 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1675 bfd_signed_vma *local_got_refcounts;
1677 /* This is a global offset table entry for a local symbol. */
1678 local_got_refcounts = elf_local_got_refcounts (abfd);
1679 if (local_got_refcounts == NULL)
1683 size = symtab_hdr->sh_info;
1684 size *= (sizeof (bfd_signed_vma)
1685 + sizeof (bfd_vma) + sizeof(char));
1686 local_got_refcounts = (bfd_signed_vma *)
1687 bfd_zalloc (abfd, size);
1688 if (local_got_refcounts == NULL)
1690 elf_local_got_refcounts (abfd) = local_got_refcounts;
1691 elf_i386_local_tlsdesc_gotent (abfd)
1692 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1693 elf_i386_local_got_tls_type (abfd)
1694 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1696 local_got_refcounts[r_symndx] += 1;
1697 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1700 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1701 tls_type |= old_tls_type;
1702 /* If a TLS symbol is accessed using IE at least once,
1703 there is no point to use dynamic model for it. */
1704 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1705 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1706 || (tls_type & GOT_TLS_IE) == 0))
1708 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1709 tls_type = old_tls_type;
1710 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1711 && GOT_TLS_GD_ANY_P (tls_type))
1712 tls_type |= old_tls_type;
1716 name = h->root.root.string;
1718 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1720 (*_bfd_error_handler)
1721 (_("%B: `%s' accessed both as normal and "
1722 "thread local symbol"),
1724 bfd_set_error (bfd_error_bad_value);
1729 if (old_tls_type != tls_type)
1732 elf_i386_hash_entry (h)->tls_type = tls_type;
1734 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1742 if (htab->elf.sgot == NULL)
1744 if (htab->elf.dynobj == NULL)
1745 htab->elf.dynobj = abfd;
1746 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1749 if (r_type != R_386_TLS_IE)
1753 case R_386_TLS_LE_32:
1755 if (bfd_link_executable (info))
1757 info->flags |= DF_STATIC_TLS;
1762 if (h != NULL && bfd_link_executable (info))
1764 /* If this reloc is in a read-only section, we might
1765 need a copy reloc. We can't check reliably at this
1766 stage whether the section is read-only, as input
1767 sections have not yet been mapped to output sections.
1768 Tentatively set the flag for now, and correct in
1769 adjust_dynamic_symbol. */
1772 /* We may need a .plt entry if the function this reloc
1773 refers to is in a shared lib. */
1774 h->plt.refcount += 1;
1775 if (r_type != R_386_PC32)
1777 h->pointer_equality_needed = 1;
1778 /* R_386_32 can be resolved at run-time. */
1779 if (r_type == R_386_32
1780 && (sec->flags & SEC_READONLY) == 0)
1781 eh->func_pointer_refcount += 1;
1787 /* If we are creating a shared library, and this is a reloc
1788 against a global symbol, or a non PC relative reloc
1789 against a local symbol, then we need to copy the reloc
1790 into the shared library. However, if we are linking with
1791 -Bsymbolic, we do not need to copy a reloc against a
1792 global symbol which is defined in an object we are
1793 including in the link (i.e., DEF_REGULAR is set). At
1794 this point we have not seen all the input files, so it is
1795 possible that DEF_REGULAR is not set now but will be set
1796 later (it is never cleared). In case of a weak definition,
1797 DEF_REGULAR may be cleared later by a strong definition in
1798 a shared library. We account for that possibility below by
1799 storing information in the relocs_copied field of the hash
1800 table entry. A similar situation occurs when creating
1801 shared libraries and symbol visibility changes render the
1804 If on the other hand, we are creating an executable, we
1805 may need to keep relocations for symbols satisfied by a
1806 dynamic library if we manage to avoid copy relocs for the
1808 if ((bfd_link_pic (info)
1809 && (sec->flags & SEC_ALLOC) != 0
1810 && (r_type != R_386_PC32
1812 && (! SYMBOLIC_BIND (info, h)
1813 || h->root.type == bfd_link_hash_defweak
1814 || !h->def_regular))))
1815 || (ELIMINATE_COPY_RELOCS
1816 && !bfd_link_pic (info)
1817 && (sec->flags & SEC_ALLOC) != 0
1819 && (h->root.type == bfd_link_hash_defweak
1820 || !h->def_regular)))
1822 struct elf_dyn_relocs *p;
1823 struct elf_dyn_relocs **head;
1825 /* We must copy these reloc types into the output file.
1826 Create a reloc section in dynobj and make room for
1830 if (htab->elf.dynobj == NULL)
1831 htab->elf.dynobj = abfd;
1833 sreloc = _bfd_elf_make_dynamic_reloc_section
1834 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1840 /* If this is a global symbol, we count the number of
1841 relocations we need for this symbol. */
1844 head = &eh->dyn_relocs;
1848 /* Track dynamic relocs needed for local syms too.
1849 We really need local syms available to do this
1854 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1859 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1863 vpp = &elf_section_data (s)->local_dynrel;
1864 head = (struct elf_dyn_relocs **)vpp;
1868 if (p == NULL || p->sec != sec)
1870 bfd_size_type amt = sizeof *p;
1871 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1883 /* Count size relocation as PC-relative relocation. */
1884 if (r_type == R_386_PC32 || size_reloc)
1889 /* This relocation describes the C++ object vtable hierarchy.
1890 Reconstruct it for later use during GC. */
1891 case R_386_GNU_VTINHERIT:
1892 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1896 /* This relocation describes which C++ vtable entries are actually
1897 used. Record for later use during GC. */
1898 case R_386_GNU_VTENTRY:
1899 BFD_ASSERT (h != NULL);
1901 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1911 && h->plt.refcount > 0
1912 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
1913 || h->got.refcount > 0)
1914 && htab->plt_got == NULL)
1916 /* Create the GOT procedure linkage table. */
1917 unsigned int plt_got_align;
1918 const struct elf_backend_data *bed;
1920 bed = get_elf_backend_data (info->output_bfd);
1921 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
1922 && (sizeof (elf_i386_got_plt_entry)
1923 == sizeof (elf_i386_pic_got_plt_entry)));
1926 if (htab->elf.dynobj == NULL)
1927 htab->elf.dynobj = abfd;
1929 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1931 (bed->dynamic_sec_flags
1936 if (htab->plt_got == NULL
1937 || !bfd_set_section_alignment (htab->elf.dynobj,
1943 if (r_type == R_386_GOT32
1944 && (h == NULL || h->type != STT_GNU_IFUNC))
1945 sec->need_convert_mov_to_lea = 1;
1951 /* Return the section that should be marked against GC for a given
1955 elf_i386_gc_mark_hook (asection *sec,
1956 struct bfd_link_info *info,
1957 Elf_Internal_Rela *rel,
1958 struct elf_link_hash_entry *h,
1959 Elf_Internal_Sym *sym)
1962 switch (ELF32_R_TYPE (rel->r_info))
1964 case R_386_GNU_VTINHERIT:
1965 case R_386_GNU_VTENTRY:
1969 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1972 /* Update the got entry reference counts for the section being removed. */
1975 elf_i386_gc_sweep_hook (bfd *abfd,
1976 struct bfd_link_info *info,
1978 const Elf_Internal_Rela *relocs)
1980 struct elf_i386_link_hash_table *htab;
1981 Elf_Internal_Shdr *symtab_hdr;
1982 struct elf_link_hash_entry **sym_hashes;
1983 bfd_signed_vma *local_got_refcounts;
1984 const Elf_Internal_Rela *rel, *relend;
1986 if (bfd_link_relocatable (info))
1989 htab = elf_i386_hash_table (info);
1993 elf_section_data (sec)->local_dynrel = NULL;
1995 symtab_hdr = &elf_symtab_hdr (abfd);
1996 sym_hashes = elf_sym_hashes (abfd);
1997 local_got_refcounts = elf_local_got_refcounts (abfd);
1999 relend = relocs + sec->reloc_count;
2000 for (rel = relocs; rel < relend; rel++)
2002 unsigned long r_symndx;
2003 unsigned int r_type;
2004 struct elf_link_hash_entry *h = NULL;
2006 r_symndx = ELF32_R_SYM (rel->r_info);
2007 if (r_symndx >= symtab_hdr->sh_info)
2009 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2010 while (h->root.type == bfd_link_hash_indirect
2011 || h->root.type == bfd_link_hash_warning)
2012 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2016 /* A local symbol. */
2017 Elf_Internal_Sym *isym;
2019 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2022 /* Check relocation against local STT_GNU_IFUNC symbol. */
2024 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2026 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
2034 struct elf_i386_link_hash_entry *eh;
2035 struct elf_dyn_relocs **pp;
2036 struct elf_dyn_relocs *p;
2038 eh = (struct elf_i386_link_hash_entry *) h;
2039 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2042 /* Everything must go for SEC. */
2048 r_type = ELF32_R_TYPE (rel->r_info);
2049 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
2050 symtab_hdr, sym_hashes,
2051 &r_type, GOT_UNKNOWN,
2052 rel, relend, h, r_symndx))
2058 if (htab->tls_ldm_got.refcount > 0)
2059 htab->tls_ldm_got.refcount -= 1;
2063 case R_386_TLS_GOTDESC:
2064 case R_386_TLS_DESC_CALL:
2065 case R_386_TLS_IE_32:
2067 case R_386_TLS_GOTIE:
2071 if (h->got.refcount > 0)
2072 h->got.refcount -= 1;
2073 if (h->type == STT_GNU_IFUNC)
2075 if (h->plt.refcount > 0)
2076 h->plt.refcount -= 1;
2079 else if (local_got_refcounts != NULL)
2081 if (local_got_refcounts[r_symndx] > 0)
2082 local_got_refcounts[r_symndx] -= 1;
2089 if (bfd_link_pic (info)
2090 && (h == NULL || h->type != STT_GNU_IFUNC))
2097 if (h->plt.refcount > 0)
2098 h->plt.refcount -= 1;
2099 if (r_type == R_386_32
2100 && (sec->flags & SEC_READONLY) == 0)
2102 struct elf_i386_link_hash_entry *eh
2103 = (struct elf_i386_link_hash_entry *) h;
2104 if (eh->func_pointer_refcount > 0)
2105 eh->func_pointer_refcount -= 1;
2111 if (h != NULL && h->type == STT_GNU_IFUNC)
2113 if (h->got.refcount > 0)
2114 h->got.refcount -= 1;
2115 if (h->plt.refcount > 0)
2116 h->plt.refcount -= 1;
2128 /* Adjust a symbol defined by a dynamic object and referenced by a
2129 regular object. The current definition is in some section of the
2130 dynamic object, but we're not including those sections. We have to
2131 change the definition to something the rest of the link can
2135 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2136 struct elf_link_hash_entry *h)
2138 struct elf_i386_link_hash_table *htab;
2140 struct elf_i386_link_hash_entry *eh;
2141 struct elf_dyn_relocs *p;
2143 /* STT_GNU_IFUNC symbol must go through PLT. */
2144 if (h->type == STT_GNU_IFUNC)
2146 /* All local STT_GNU_IFUNC references must be treate as local
2147 calls via local PLT. */
2149 && SYMBOL_CALLS_LOCAL (info, h))
2151 bfd_size_type pc_count = 0, count = 0;
2152 struct elf_dyn_relocs **pp;
2154 eh = (struct elf_i386_link_hash_entry *) h;
2155 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2157 pc_count += p->pc_count;
2158 p->count -= p->pc_count;
2167 if (pc_count || count)
2171 if (h->plt.refcount <= 0)
2172 h->plt.refcount = 1;
2174 h->plt.refcount += 1;
2178 if (h->plt.refcount <= 0)
2180 h->plt.offset = (bfd_vma) -1;
2186 /* If this is a function, put it in the procedure linkage table. We
2187 will fill in the contents of the procedure linkage table later,
2188 when we know the address of the .got section. */
2189 if (h->type == STT_FUNC
2192 if (h->plt.refcount <= 0
2193 || SYMBOL_CALLS_LOCAL (info, h)
2194 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2195 && h->root.type == bfd_link_hash_undefweak))
2197 /* This case can occur if we saw a PLT32 reloc in an input
2198 file, but the symbol was never referred to by a dynamic
2199 object, or if all references were garbage collected. In
2200 such a case, we don't actually need to build a procedure
2201 linkage table, and we can just do a PC32 reloc instead. */
2202 h->plt.offset = (bfd_vma) -1;
2209 /* It's possible that we incorrectly decided a .plt reloc was
2210 needed for an R_386_PC32 reloc to a non-function sym in
2211 check_relocs. We can't decide accurately between function and
2212 non-function syms in check-relocs; Objects loaded later in
2213 the link may change h->type. So fix it now. */
2214 h->plt.offset = (bfd_vma) -1;
2216 /* If this is a weak symbol, and there is a real definition, the
2217 processor independent code will have arranged for us to see the
2218 real definition first, and we can just use the same value. */
2219 if (h->u.weakdef != NULL)
2221 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2222 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2223 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2224 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2225 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2226 h->non_got_ref = h->u.weakdef->non_got_ref;
2230 /* This is a reference to a symbol defined by a dynamic object which
2231 is not a function. */
2233 /* If we are creating a shared library, we must presume that the
2234 only references to the symbol are via the global offset table.
2235 For such cases we need not do anything here; the relocations will
2236 be handled correctly by relocate_section. */
2237 if (!bfd_link_executable (info))
2240 /* If there are no references to this symbol that do not use the
2241 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2243 eh = (struct elf_i386_link_hash_entry *) h;
2244 if (!h->non_got_ref && !eh->gotoff_ref)
2247 /* If -z nocopyreloc was given, we won't generate them either. */
2248 if (info->nocopyreloc)
2254 htab = elf_i386_hash_table (info);
2258 /* If there aren't any dynamic relocs in read-only sections nor
2259 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2260 avoid the copy reloc. This doesn't work on VxWorks, where we can
2261 not have dynamic relocations (other than copy and jump slot
2262 relocations) in an executable. */
2263 if (ELIMINATE_COPY_RELOCS
2265 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2267 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2269 s = p->sec->output_section;
2270 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2281 /* We must allocate the symbol in our .dynbss section, which will
2282 become part of the .bss section of the executable. There will be
2283 an entry for this symbol in the .dynsym section. The dynamic
2284 object will contain position independent code, so all references
2285 from the dynamic object to this symbol will go through the global
2286 offset table. The dynamic linker will use the .dynsym entry to
2287 determine the address it must put in the global offset table, so
2288 both the dynamic object and the regular object will refer to the
2289 same memory location for the variable. */
2291 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2292 copy the initial value out of the dynamic object and into the
2293 runtime process image. */
2294 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2296 htab->srelbss->size += sizeof (Elf32_External_Rel);
2302 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2305 /* Allocate space in .plt, .got and associated reloc sections for
2309 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2311 struct bfd_link_info *info;
2312 struct elf_i386_link_hash_table *htab;
2313 struct elf_i386_link_hash_entry *eh;
2314 struct elf_dyn_relocs *p;
2315 unsigned plt_entry_size;
2317 if (h->root.type == bfd_link_hash_indirect)
2320 eh = (struct elf_i386_link_hash_entry *) h;
2322 info = (struct bfd_link_info *) inf;
2323 htab = elf_i386_hash_table (info);
2327 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2329 /* Clear the reference count of function pointer relocations if
2330 symbol isn't a normal function. */
2331 if (h->type != STT_FUNC)
2332 eh->func_pointer_refcount = 0;
2334 /* We can't use the GOT PLT if pointer equality is needed since
2335 finish_dynamic_symbol won't clear symbol value and the dynamic
2336 linker won't update the GOT slot. We will get into an infinite
2337 loop at run-time. */
2338 if (htab->plt_got != NULL
2339 && h->type != STT_GNU_IFUNC
2340 && !h->pointer_equality_needed
2341 && h->plt.refcount > 0
2342 && h->got.refcount > 0)
2344 /* Don't use the regular PLT if there are both GOT and GOTPLT
2346 h->plt.offset = (bfd_vma) -1;
2348 /* Use the GOT PLT. */
2349 eh->plt_got.refcount = 1;
2352 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2353 here if it is defined and referenced in a non-shared object. */
2354 if (h->type == STT_GNU_IFUNC
2356 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2359 /* Don't create the PLT entry if there are only function pointer
2360 relocations which can be resolved at run-time. */
2361 else if (htab->elf.dynamic_sections_created
2362 && (h->plt.refcount > eh->func_pointer_refcount
2363 || eh->plt_got.refcount > 0))
2365 bfd_boolean use_plt_got;
2367 /* Clear the reference count of function pointer relocations
2369 eh->func_pointer_refcount = 0;
2371 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2373 /* Don't use the regular PLT for DF_BIND_NOW. */
2374 h->plt.offset = (bfd_vma) -1;
2376 /* Use the GOT PLT. */
2377 h->got.refcount = 1;
2378 eh->plt_got.refcount = 1;
2381 use_plt_got = eh->plt_got.refcount > 0;
2383 /* Make sure this symbol is output as a dynamic symbol.
2384 Undefined weak syms won't yet be marked as dynamic. */
2385 if (h->dynindx == -1
2386 && !h->forced_local)
2388 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2392 if (bfd_link_pic (info)
2393 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2395 asection *s = htab->elf.splt;
2396 asection *got_s = htab->plt_got;
2398 /* If this is the first .plt entry, make room for the special
2399 first entry. The .plt section is used by prelink to undo
2400 prelinking for dynamic relocations. */
2402 s->size = plt_entry_size;
2405 eh->plt_got.offset = got_s->size;
2407 h->plt.offset = s->size;
2409 /* If this symbol is not defined in a regular file, and we are
2410 not generating a shared library, then set the symbol to this
2411 location in the .plt. This is required to make function
2412 pointers compare as equal between the normal executable and
2413 the shared library. */
2414 if (! bfd_link_pic (info)
2419 /* We need to make a call to the entry of the GOT PLT
2420 instead of regular PLT entry. */
2421 h->root.u.def.section = got_s;
2422 h->root.u.def.value = eh->plt_got.offset;
2426 h->root.u.def.section = s;
2427 h->root.u.def.value = h->plt.offset;
2431 /* Make room for this entry. */
2433 got_s->size += sizeof (elf_i386_got_plt_entry);
2436 s->size += plt_entry_size;
2438 /* We also need to make an entry in the .got.plt section,
2439 which will be placed in the .got section by the linker
2441 htab->elf.sgotplt->size += 4;
2443 /* We also need to make an entry in the .rel.plt section. */
2444 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2445 htab->elf.srelplt->reloc_count++;
2448 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2449 && !bfd_link_pic (info))
2451 /* VxWorks has a second set of relocations for each PLT entry
2452 in executables. They go in a separate relocation section,
2453 which is processed by the kernel loader. */
2455 /* There are two relocations for the initial PLT entry: an
2456 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2457 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2459 if (h->plt.offset == plt_entry_size)
2460 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2462 /* There are two extra relocations for each subsequent PLT entry:
2463 an R_386_32 relocation for the GOT entry, and an R_386_32
2464 relocation for the PLT entry. */
2466 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2471 h->plt.offset = (bfd_vma) -1;
2477 h->plt.offset = (bfd_vma) -1;
2481 eh->tlsdesc_got = (bfd_vma) -1;
2483 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2484 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2485 if (h->got.refcount > 0
2486 && bfd_link_executable (info)
2488 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2489 h->got.offset = (bfd_vma) -1;
2490 else if (h->got.refcount > 0)
2494 int tls_type = elf_i386_hash_entry(h)->tls_type;
2496 /* Make sure this symbol is output as a dynamic symbol.
2497 Undefined weak syms won't yet be marked as dynamic. */
2498 if (h->dynindx == -1
2499 && !h->forced_local)
2501 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2506 if (GOT_TLS_GDESC_P (tls_type))
2508 eh->tlsdesc_got = htab->elf.sgotplt->size
2509 - elf_i386_compute_jump_table_size (htab);
2510 htab->elf.sgotplt->size += 8;
2511 h->got.offset = (bfd_vma) -2;
2513 if (! GOT_TLS_GDESC_P (tls_type)
2514 || GOT_TLS_GD_P (tls_type))
2516 h->got.offset = s->size;
2518 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2519 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2522 dyn = htab->elf.dynamic_sections_created;
2523 /* R_386_TLS_IE_32 needs one dynamic relocation,
2524 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2525 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2526 need two), R_386_TLS_GD needs one if local symbol and two if
2528 if (tls_type == GOT_TLS_IE_BOTH)
2529 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2530 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2531 || (tls_type & GOT_TLS_IE))
2532 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2533 else if (GOT_TLS_GD_P (tls_type))
2534 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2535 else if (! GOT_TLS_GDESC_P (tls_type)
2536 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2537 || h->root.type != bfd_link_hash_undefweak)
2538 && (bfd_link_pic (info)
2539 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2540 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2541 if (GOT_TLS_GDESC_P (tls_type))
2542 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2545 h->got.offset = (bfd_vma) -1;
2547 if (eh->dyn_relocs == NULL)
2550 /* In the shared -Bsymbolic case, discard space allocated for
2551 dynamic pc-relative relocs against symbols which turn out to be
2552 defined in regular objects. For the normal shared case, discard
2553 space for pc-relative relocs that have become local due to symbol
2554 visibility changes. */
2556 if (bfd_link_pic (info))
2558 /* The only reloc that uses pc_count is R_386_PC32, which will
2559 appear on a call or on something like ".long foo - .". We
2560 want calls to protected symbols to resolve directly to the
2561 function rather than going via the plt. If people want
2562 function pointer comparisons to work as expected then they
2563 should avoid writing assembly like ".long foo - .". */
2564 if (SYMBOL_CALLS_LOCAL (info, h))
2566 struct elf_dyn_relocs **pp;
2568 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2570 p->count -= p->pc_count;
2579 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2581 struct elf_dyn_relocs **pp;
2582 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2584 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2591 /* Also discard relocs on undefined weak syms with non-default
2593 if (eh->dyn_relocs != NULL
2594 && h->root.type == bfd_link_hash_undefweak)
2596 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2597 eh->dyn_relocs = NULL;
2599 /* Make sure undefined weak symbols are output as a dynamic
2601 else if (h->dynindx == -1
2602 && !h->forced_local)
2604 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2609 else if (ELIMINATE_COPY_RELOCS)
2611 /* For the non-shared case, discard space for relocs against
2612 symbols which turn out to need copy relocs or are not
2613 dynamic. Keep dynamic relocations for run-time function
2614 pointer initialization. */
2616 if ((!h->non_got_ref || eh->func_pointer_refcount > 0)
2619 || (htab->elf.dynamic_sections_created
2620 && (h->root.type == bfd_link_hash_undefweak
2621 || h->root.type == bfd_link_hash_undefined))))
2623 /* Make sure this symbol is output as a dynamic symbol.
2624 Undefined weak syms won't yet be marked as dynamic. */
2625 if (h->dynindx == -1
2626 && !h->forced_local)
2628 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2632 /* If that succeeded, we know we'll be keeping all the
2634 if (h->dynindx != -1)
2638 eh->dyn_relocs = NULL;
2639 eh->func_pointer_refcount = 0;
2644 /* Finally, allocate space. */
2645 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2649 sreloc = elf_section_data (p->sec)->sreloc;
2651 BFD_ASSERT (sreloc != NULL);
2652 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2658 /* Allocate space in .plt, .got and associated reloc sections for
2659 local dynamic relocs. */
2662 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2664 struct elf_link_hash_entry *h
2665 = (struct elf_link_hash_entry *) *slot;
2667 if (h->type != STT_GNU_IFUNC
2671 || h->root.type != bfd_link_hash_defined)
2674 return elf_i386_allocate_dynrelocs (h, inf);
2677 /* Find any dynamic relocs that apply to read-only sections. */
2680 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2682 struct elf_i386_link_hash_entry *eh;
2683 struct elf_dyn_relocs *p;
2685 /* Skip local IFUNC symbols. */
2686 if (h->forced_local && h->type == STT_GNU_IFUNC)
2689 eh = (struct elf_i386_link_hash_entry *) h;
2690 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2692 asection *s = p->sec->output_section;
2694 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2696 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2698 info->flags |= DF_TEXTREL;
2700 if ((info->warn_shared_textrel && bfd_link_pic (info))
2701 || info->error_textrel)
2702 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2703 p->sec->owner, h->root.root.string,
2706 /* Not an error, just cut short the traversal. */
2714 mov foo@GOT(%reg), %reg
2716 lea foo@GOTOFF(%reg), %reg
2717 with the local symbol, foo. */
2720 elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2721 struct bfd_link_info *link_info)
2723 Elf_Internal_Shdr *symtab_hdr;
2724 Elf_Internal_Rela *internal_relocs;
2725 Elf_Internal_Rela *irel, *irelend;
2727 struct elf_i386_link_hash_table *htab;
2728 bfd_boolean changed_contents;
2729 bfd_boolean changed_relocs;
2730 bfd_signed_vma *local_got_refcounts;
2732 /* Don't even try to convert non-ELF outputs. */
2733 if (!is_elf_hash_table (link_info->hash))
2736 /* Nothing to do if there is no need or no output. */
2737 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2738 || sec->need_convert_mov_to_lea == 0
2739 || bfd_is_abs_section (sec->output_section))
2742 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2744 /* Load the relocations for this section. */
2745 internal_relocs = (_bfd_elf_link_read_relocs
2746 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2747 link_info->keep_memory));
2748 if (internal_relocs == NULL)
2751 htab = elf_i386_hash_table (link_info);
2752 changed_contents = FALSE;
2753 changed_relocs = FALSE;
2754 local_got_refcounts = elf_local_got_refcounts (abfd);
2756 /* Get the section contents. */
2757 if (elf_section_data (sec)->this_hdr.contents != NULL)
2758 contents = elf_section_data (sec)->this_hdr.contents;
2761 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2765 irelend = internal_relocs + sec->reloc_count;
2766 for (irel = internal_relocs; irel < irelend; irel++)
2768 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2769 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2771 struct elf_link_hash_entry *h;
2773 if (r_type != R_386_GOT32)
2776 /* Get the symbol referred to by the reloc. */
2777 if (r_symndx < symtab_hdr->sh_info)
2779 Elf_Internal_Sym *isym;
2781 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2784 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2785 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2786 && irel->r_offset >= 2
2787 && bfd_get_8 (abfd, contents + irel->r_offset - 2) == 0x8b)
2789 bfd_put_8 (abfd, 0x8d, contents + irel->r_offset - 2);
2790 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2791 if (local_got_refcounts != NULL
2792 && local_got_refcounts[r_symndx] > 0)
2793 local_got_refcounts[r_symndx] -= 1;
2794 changed_contents = TRUE;
2795 changed_relocs = TRUE;
2800 indx = r_symndx - symtab_hdr->sh_info;
2801 h = elf_sym_hashes (abfd)[indx];
2802 BFD_ASSERT (h != NULL);
2804 while (h->root.type == bfd_link_hash_indirect
2805 || h->root.type == bfd_link_hash_warning)
2806 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2808 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2809 optimizing _DYNAMIC since ld.so may use its link-time address. */
2811 && h->type != STT_GNU_IFUNC
2812 && h != htab->elf.hdynamic
2813 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2814 && irel->r_offset >= 2
2815 && bfd_get_8 (abfd, contents + irel->r_offset - 2) == 0x8b)
2817 bfd_put_8 (abfd, 0x8d, contents + irel->r_offset - 2);
2818 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2819 if (h->got.refcount > 0)
2820 h->got.refcount -= 1;
2821 changed_contents = TRUE;
2822 changed_relocs = TRUE;
2826 if (contents != NULL
2827 && elf_section_data (sec)->this_hdr.contents != contents)
2829 if (!changed_contents && !link_info->keep_memory)
2833 /* Cache the section contents for elf_link_input_bfd. */
2834 elf_section_data (sec)->this_hdr.contents = contents;
2838 if (elf_section_data (sec)->relocs != internal_relocs)
2840 if (!changed_relocs)
2841 free (internal_relocs);
2843 elf_section_data (sec)->relocs = internal_relocs;
2849 if (contents != NULL
2850 && elf_section_data (sec)->this_hdr.contents != contents)
2852 if (internal_relocs != NULL
2853 && elf_section_data (sec)->relocs != internal_relocs)
2854 free (internal_relocs);
2858 /* Set the sizes of the dynamic sections. */
2861 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2863 struct elf_i386_link_hash_table *htab;
2869 htab = elf_i386_hash_table (info);
2872 dynobj = htab->elf.dynobj;
2876 if (htab->elf.dynamic_sections_created)
2878 /* Set the contents of the .interp section to the interpreter. */
2879 if (bfd_link_executable (info))
2881 s = bfd_get_linker_section (dynobj, ".interp");
2884 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2885 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2889 /* Set up .got offsets for local syms, and space for local dynamic
2891 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2893 bfd_signed_vma *local_got;
2894 bfd_signed_vma *end_local_got;
2895 char *local_tls_type;
2896 bfd_vma *local_tlsdesc_gotent;
2897 bfd_size_type locsymcount;
2898 Elf_Internal_Shdr *symtab_hdr;
2901 if (! is_i386_elf (ibfd))
2904 for (s = ibfd->sections; s != NULL; s = s->next)
2906 struct elf_dyn_relocs *p;
2908 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2911 for (p = ((struct elf_dyn_relocs *)
2912 elf_section_data (s)->local_dynrel);
2916 if (!bfd_is_abs_section (p->sec)
2917 && bfd_is_abs_section (p->sec->output_section))
2919 /* Input section has been discarded, either because
2920 it is a copy of a linkonce section or due to
2921 linker script /DISCARD/, so we'll be discarding
2924 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
2925 && strcmp (p->sec->output_section->name,
2928 /* Relocations in vxworks .tls_vars sections are
2929 handled specially by the loader. */
2931 else if (p->count != 0)
2933 srel = elf_section_data (p->sec)->sreloc;
2934 srel->size += p->count * sizeof (Elf32_External_Rel);
2935 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2936 && (info->flags & DF_TEXTREL) == 0)
2938 info->flags |= DF_TEXTREL;
2939 if ((info->warn_shared_textrel && bfd_link_pic (info))
2940 || info->error_textrel)
2941 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2942 p->sec->owner, p->sec);
2948 local_got = elf_local_got_refcounts (ibfd);
2952 symtab_hdr = &elf_symtab_hdr (ibfd);
2953 locsymcount = symtab_hdr->sh_info;
2954 end_local_got = local_got + locsymcount;
2955 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2956 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2958 srel = htab->elf.srelgot;
2959 for (; local_got < end_local_got;
2960 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2962 *local_tlsdesc_gotent = (bfd_vma) -1;
2965 if (GOT_TLS_GDESC_P (*local_tls_type))
2967 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2968 - elf_i386_compute_jump_table_size (htab);
2969 htab->elf.sgotplt->size += 8;
2970 *local_got = (bfd_vma) -2;
2972 if (! GOT_TLS_GDESC_P (*local_tls_type)
2973 || GOT_TLS_GD_P (*local_tls_type))
2975 *local_got = s->size;
2977 if (GOT_TLS_GD_P (*local_tls_type)
2978 || *local_tls_type == GOT_TLS_IE_BOTH)
2981 if (bfd_link_pic (info)
2982 || GOT_TLS_GD_ANY_P (*local_tls_type)
2983 || (*local_tls_type & GOT_TLS_IE))
2985 if (*local_tls_type == GOT_TLS_IE_BOTH)
2986 srel->size += 2 * sizeof (Elf32_External_Rel);
2987 else if (GOT_TLS_GD_P (*local_tls_type)
2988 || ! GOT_TLS_GDESC_P (*local_tls_type))
2989 srel->size += sizeof (Elf32_External_Rel);
2990 if (GOT_TLS_GDESC_P (*local_tls_type))
2991 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2995 *local_got = (bfd_vma) -1;
2999 if (htab->tls_ldm_got.refcount > 0)
3001 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3003 htab->tls_ldm_got.offset = htab->elf.sgot->size;
3004 htab->elf.sgot->size += 8;
3005 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
3008 htab->tls_ldm_got.offset = -1;
3010 /* Allocate global sym .plt and .got entries, and space for global
3011 sym dynamic relocs. */
3012 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
3014 /* Allocate .plt and .got entries, and space for local symbols. */
3015 htab_traverse (htab->loc_hash_table,
3016 elf_i386_allocate_local_dynrelocs,
3019 /* For every jump slot reserved in the sgotplt, reloc_count is
3020 incremented. However, when we reserve space for TLS descriptors,
3021 it's not incremented, so in order to compute the space reserved
3022 for them, it suffices to multiply the reloc count by the jump
3025 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3026 so that R_386_IRELATIVE entries come last. */
3027 if (htab->elf.srelplt)
3029 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
3030 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
3031 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3033 else if (htab->elf.irelplt)
3034 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3037 if (htab->elf.sgotplt)
3039 /* Don't allocate .got.plt section if there are no GOT nor PLT
3040 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3041 if ((htab->elf.hgot == NULL
3042 || !htab->elf.hgot->ref_regular_nonweak)
3043 && (htab->elf.sgotplt->size
3044 == get_elf_backend_data (output_bfd)->got_header_size)
3045 && (htab->elf.splt == NULL
3046 || htab->elf.splt->size == 0)
3047 && (htab->elf.sgot == NULL
3048 || htab->elf.sgot->size == 0)
3049 && (htab->elf.iplt == NULL
3050 || htab->elf.iplt->size == 0)
3051 && (htab->elf.igotplt == NULL
3052 || htab->elf.igotplt->size == 0))
3053 htab->elf.sgotplt->size = 0;
3057 if (htab->plt_eh_frame != NULL
3058 && htab->elf.splt != NULL
3059 && htab->elf.splt->size != 0
3060 && !bfd_is_abs_section (htab->elf.splt->output_section)
3061 && _bfd_elf_eh_frame_present (info))
3062 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
3064 /* We now have determined the sizes of the various dynamic sections.
3065 Allocate memory for them. */
3067 for (s = dynobj->sections; s != NULL; s = s->next)
3069 bfd_boolean strip_section = TRUE;
3071 if ((s->flags & SEC_LINKER_CREATED) == 0)
3074 if (s == htab->elf.splt
3075 || s == htab->elf.sgot)
3077 /* Strip this section if we don't need it; see the
3079 /* We'd like to strip these sections if they aren't needed, but if
3080 we've exported dynamic symbols from them we must leave them.
3081 It's too late to tell BFD to get rid of the symbols. */
3083 if (htab->elf.hplt != NULL)
3084 strip_section = FALSE;
3086 else if (s == htab->elf.sgotplt
3087 || s == htab->elf.iplt
3088 || s == htab->elf.igotplt
3089 || s == htab->plt_got
3090 || s == htab->plt_eh_frame
3091 || s == htab->sdynbss)
3093 /* Strip these too. */
3095 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
3098 && s != htab->elf.srelplt
3099 && s != htab->srelplt2)
3102 /* We use the reloc_count field as a counter if we need
3103 to copy relocs into the output file. */
3108 /* It's not one of our sections, so don't allocate space. */
3114 /* If we don't need this section, strip it from the
3115 output file. This is mostly to handle .rel.bss and
3116 .rel.plt. We must create both sections in
3117 create_dynamic_sections, because they must be created
3118 before the linker maps input sections to output
3119 sections. The linker does that before
3120 adjust_dynamic_symbol is called, and it is that
3121 function which decides whether anything needs to go
3122 into these sections. */
3124 s->flags |= SEC_EXCLUDE;
3128 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3131 /* Allocate memory for the section contents. We use bfd_zalloc
3132 here in case unused entries are not reclaimed before the
3133 section's contents are written out. This should not happen,
3134 but this way if it does, we get a R_386_NONE reloc instead
3136 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3137 if (s->contents == NULL)
3141 if (htab->plt_eh_frame != NULL
3142 && htab->plt_eh_frame->contents != NULL)
3144 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3145 sizeof (elf_i386_eh_frame_plt));
3146 bfd_put_32 (dynobj, htab->elf.splt->size,
3147 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3150 if (htab->elf.dynamic_sections_created)
3152 /* Add some entries to the .dynamic section. We fill in the
3153 values later, in elf_i386_finish_dynamic_sections, but we
3154 must add the entries now so that we get the correct size for
3155 the .dynamic section. The DT_DEBUG entry is filled in by the
3156 dynamic linker and used by the debugger. */
3157 #define add_dynamic_entry(TAG, VAL) \
3158 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3160 if (bfd_link_executable (info))
3162 if (!add_dynamic_entry (DT_DEBUG, 0))
3166 if (htab->elf.splt->size != 0)
3168 /* DT_PLTGOT is used by prelink even if there is no PLT
3170 if (!add_dynamic_entry (DT_PLTGOT, 0))
3173 if (htab->elf.srelplt->size != 0)
3175 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3176 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3177 || !add_dynamic_entry (DT_JMPREL, 0))
3184 if (!add_dynamic_entry (DT_REL, 0)
3185 || !add_dynamic_entry (DT_RELSZ, 0)
3186 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3189 /* If any dynamic relocs apply to a read-only section,
3190 then we need a DT_TEXTREL entry. */
3191 if ((info->flags & DF_TEXTREL) == 0)
3192 elf_link_hash_traverse (&htab->elf,
3193 elf_i386_readonly_dynrelocs, info);
3195 if ((info->flags & DF_TEXTREL) != 0)
3197 if ((elf_tdata (output_bfd)->has_gnu_symbols
3198 & elf_gnu_symbol_ifunc) == elf_gnu_symbol_ifunc)
3200 info->callbacks->einfo
3201 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3202 bfd_set_error (bfd_error_bad_value);
3206 if (!add_dynamic_entry (DT_TEXTREL, 0))
3210 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3211 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3214 #undef add_dynamic_entry
3220 elf_i386_always_size_sections (bfd *output_bfd,
3221 struct bfd_link_info *info)
3223 asection *tls_sec = elf_hash_table (info)->tls_sec;
3227 struct elf_link_hash_entry *tlsbase;
3229 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3230 "_TLS_MODULE_BASE_",
3231 FALSE, FALSE, FALSE);
3233 if (tlsbase && tlsbase->type == STT_TLS)
3235 struct elf_i386_link_hash_table *htab;
3236 struct bfd_link_hash_entry *bh = NULL;
3237 const struct elf_backend_data *bed
3238 = get_elf_backend_data (output_bfd);
3240 htab = elf_i386_hash_table (info);
3244 if (!(_bfd_generic_link_add_one_symbol
3245 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3246 tls_sec, 0, NULL, FALSE,
3247 bed->collect, &bh)))
3250 htab->tls_module_base = bh;
3252 tlsbase = (struct elf_link_hash_entry *)bh;
3253 tlsbase->def_regular = 1;
3254 tlsbase->other = STV_HIDDEN;
3255 tlsbase->root.linker_def = 1;
3256 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3263 /* Set the correct type for an x86 ELF section. We do this by the
3264 section name, which is a hack, but ought to work. */
3267 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3268 Elf_Internal_Shdr *hdr,
3273 name = bfd_get_section_name (abfd, sec);
3275 /* This is an ugly, but unfortunately necessary hack that is
3276 needed when producing EFI binaries on x86. It tells
3277 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3278 containing ELF relocation info. We need this hack in order to
3279 be able to generate ELF binaries that can be translated into
3280 EFI applications (which are essentially COFF objects). Those
3281 files contain a COFF ".reloc" section inside an ELFNN object,
3282 which would normally cause BFD to segfault because it would
3283 attempt to interpret this section as containing relocation
3284 entries for section "oc". With this hack enabled, ".reloc"
3285 will be treated as a normal data section, which will avoid the
3286 segfault. However, you won't be able to create an ELFNN binary
3287 with a section named "oc" that needs relocations, but that's
3288 the kind of ugly side-effects you get when detecting section
3289 types based on their names... In practice, this limitation is
3290 unlikely to bite. */
3291 if (strcmp (name, ".reloc") == 0)
3292 hdr->sh_type = SHT_PROGBITS;
3297 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3298 executables. Rather than setting it to the beginning of the TLS
3299 section, we have to set it to the end. This function may be called
3300 multiple times, it is idempotent. */
3303 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3305 struct elf_i386_link_hash_table *htab;
3306 struct bfd_link_hash_entry *base;
3308 if (!bfd_link_executable (info))
3311 htab = elf_i386_hash_table (info);
3315 base = htab->tls_module_base;
3319 base->u.def.value = htab->elf.tls_size;
3322 /* Return the base VMA address which should be subtracted from real addresses
3323 when resolving @dtpoff relocation.
3324 This is PT_TLS segment p_vaddr. */
3327 elf_i386_dtpoff_base (struct bfd_link_info *info)
3329 /* If tls_sec is NULL, we should have signalled an error already. */
3330 if (elf_hash_table (info)->tls_sec == NULL)
3332 return elf_hash_table (info)->tls_sec->vma;
3335 /* Return the relocation value for @tpoff relocation
3336 if STT_TLS virtual address is ADDRESS. */
3339 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3341 struct elf_link_hash_table *htab = elf_hash_table (info);
3342 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3343 bfd_vma static_tls_size;
3345 /* If tls_sec is NULL, we should have signalled an error already. */
3346 if (htab->tls_sec == NULL)
3349 /* Consider special static TLS alignment requirements. */
3350 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3351 return static_tls_size + htab->tls_sec->vma - address;
3354 /* Relocate an i386 ELF section. */
3357 elf_i386_relocate_section (bfd *output_bfd,
3358 struct bfd_link_info *info,
3360 asection *input_section,
3362 Elf_Internal_Rela *relocs,
3363 Elf_Internal_Sym *local_syms,
3364 asection **local_sections)
3366 struct elf_i386_link_hash_table *htab;
3367 Elf_Internal_Shdr *symtab_hdr;
3368 struct elf_link_hash_entry **sym_hashes;
3369 bfd_vma *local_got_offsets;
3370 bfd_vma *local_tlsdesc_gotents;
3371 Elf_Internal_Rela *rel;
3372 Elf_Internal_Rela *relend;
3373 bfd_boolean is_vxworks_tls;
3374 unsigned plt_entry_size;
3376 BFD_ASSERT (is_i386_elf (input_bfd));
3378 htab = elf_i386_hash_table (info);
3381 symtab_hdr = &elf_symtab_hdr (input_bfd);
3382 sym_hashes = elf_sym_hashes (input_bfd);
3383 local_got_offsets = elf_local_got_offsets (input_bfd);
3384 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3385 /* We have to handle relocations in vxworks .tls_vars sections
3386 specially, because the dynamic loader is 'weird'. */
3387 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3388 && bfd_link_pic (info)
3389 && !strcmp (input_section->output_section->name,
3392 elf_i386_set_tls_module_base (info);
3394 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3397 relend = relocs + input_section->reloc_count;
3398 for (; rel < relend; rel++)
3400 unsigned int r_type;
3401 reloc_howto_type *howto;
3402 unsigned long r_symndx;
3403 struct elf_link_hash_entry *h;
3404 struct elf_i386_link_hash_entry *eh;
3405 Elf_Internal_Sym *sym;
3407 bfd_vma off, offplt, plt_offset;
3409 bfd_boolean unresolved_reloc;
3410 bfd_reloc_status_type r;
3414 asection *resolved_plt;
3416 r_type = ELF32_R_TYPE (rel->r_info);
3417 if (r_type == R_386_GNU_VTINHERIT
3418 || r_type == R_386_GNU_VTENTRY)
3421 if ((indx = r_type) >= R_386_standard
3422 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3423 >= R_386_ext - R_386_standard)
3424 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3425 >= R_386_ext2 - R_386_ext))
3427 (*_bfd_error_handler)
3428 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3429 input_bfd, input_section, r_type);
3430 bfd_set_error (bfd_error_bad_value);
3433 howto = elf_howto_table + indx;
3435 r_symndx = ELF32_R_SYM (rel->r_info);
3439 unresolved_reloc = FALSE;
3440 if (r_symndx < symtab_hdr->sh_info)
3442 sym = local_syms + r_symndx;
3443 sec = local_sections[r_symndx];
3444 relocation = (sec->output_section->vma
3445 + sec->output_offset
3447 st_size = sym->st_size;
3449 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3450 && ((sec->flags & SEC_MERGE) != 0
3451 || (bfd_link_relocatable (info)
3452 && sec->output_offset != 0)))
3455 bfd_byte *where = contents + rel->r_offset;
3457 switch (howto->size)
3460 addend = bfd_get_8 (input_bfd, where);
3461 if (howto->pc_relative)
3463 addend = (addend ^ 0x80) - 0x80;
3468 addend = bfd_get_16 (input_bfd, where);
3469 if (howto->pc_relative)
3471 addend = (addend ^ 0x8000) - 0x8000;
3476 addend = bfd_get_32 (input_bfd, where);
3477 if (howto->pc_relative)
3479 addend = (addend ^ 0x80000000) - 0x80000000;
3487 if (bfd_link_relocatable (info))
3488 addend += sec->output_offset;
3491 asection *msec = sec;
3492 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3494 addend -= relocation;
3495 addend += msec->output_section->vma + msec->output_offset;
3498 switch (howto->size)
3501 /* FIXME: overflow checks. */
3502 if (howto->pc_relative)
3504 bfd_put_8 (input_bfd, addend, where);
3507 if (howto->pc_relative)
3509 bfd_put_16 (input_bfd, addend, where);
3512 if (howto->pc_relative)
3514 bfd_put_32 (input_bfd, addend, where);
3518 else if (!bfd_link_relocatable (info)
3519 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3521 /* Relocate against local STT_GNU_IFUNC symbol. */
3522 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3527 /* Set STT_GNU_IFUNC symbol value. */
3528 h->root.u.def.value = sym->st_value;
3529 h->root.u.def.section = sec;
3534 bfd_boolean warned ATTRIBUTE_UNUSED;
3535 bfd_boolean ignored ATTRIBUTE_UNUSED;
3537 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3538 r_symndx, symtab_hdr, sym_hashes,
3540 unresolved_reloc, warned, ignored);
3544 if (sec != NULL && discarded_section (sec))
3545 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3546 rel, 1, relend, howto, 0, contents);
3548 if (bfd_link_relocatable (info))
3551 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3552 it here if it is defined in a non-shared object. */
3554 && h->type == STT_GNU_IFUNC
3557 asection *plt, *gotplt, *base_got;
3561 if ((input_section->flags & SEC_ALLOC) == 0)
3563 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3564 sections because such sections are not SEC_ALLOC and
3565 thus ld.so will not process them. */
3566 if ((input_section->flags & SEC_DEBUGGING) != 0)
3570 else if (h->plt.offset == (bfd_vma) -1)
3573 /* STT_GNU_IFUNC symbol must go through PLT. */
3574 if (htab->elf.splt != NULL)
3576 plt = htab->elf.splt;
3577 gotplt = htab->elf.sgotplt;
3581 plt = htab->elf.iplt;
3582 gotplt = htab->elf.igotplt;
3585 relocation = (plt->output_section->vma
3586 + plt->output_offset + h->plt.offset);
3591 if (h->root.root.string)
3592 name = h->root.root.string;
3594 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3596 (*_bfd_error_handler)
3597 (_("%B: relocation %s against STT_GNU_IFUNC "
3598 "symbol `%s' isn't handled by %s"), input_bfd,
3599 elf_howto_table[r_type].name,
3600 name, __FUNCTION__);
3601 bfd_set_error (bfd_error_bad_value);
3605 /* Generate dynamic relcoation only when there is a
3606 non-GOT reference in a shared object. */
3607 if (bfd_link_pic (info) && h->non_got_ref)
3609 Elf_Internal_Rela outrel;
3613 /* Need a dynamic relocation to get the real function
3615 offset = _bfd_elf_section_offset (output_bfd,
3619 if (offset == (bfd_vma) -1
3620 || offset == (bfd_vma) -2)
3623 outrel.r_offset = (input_section->output_section->vma
3624 + input_section->output_offset
3627 if (h->dynindx == -1
3629 || bfd_link_executable (info))
3631 /* This symbol is resolved locally. */
3632 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3633 bfd_put_32 (output_bfd,
3634 (h->root.u.def.value
3635 + h->root.u.def.section->output_section->vma
3636 + h->root.u.def.section->output_offset),
3640 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3642 sreloc = htab->elf.irelifunc;
3643 elf_append_rel (output_bfd, sreloc, &outrel);
3645 /* If this reloc is against an external symbol, we
3646 do not want to fiddle with the addend. Otherwise,
3647 we need to include the symbol value so that it
3648 becomes an addend for the dynamic reloc. For an
3649 internal symbol, we have updated addend. */
3658 base_got = htab->elf.sgot;
3659 off = h->got.offset;
3661 if (base_got == NULL)
3664 if (off == (bfd_vma) -1)
3666 /* We can't use h->got.offset here to save state, or
3667 even just remember the offset, as finish_dynamic_symbol
3668 would use that as offset into .got. */
3670 if (htab->elf.splt != NULL)
3672 plt_index = h->plt.offset / plt_entry_size - 1;
3673 off = (plt_index + 3) * 4;
3674 base_got = htab->elf.sgotplt;
3678 plt_index = h->plt.offset / plt_entry_size;
3679 off = plt_index * 4;
3680 base_got = htab->elf.igotplt;
3683 if (h->dynindx == -1
3687 /* This references the local defitionion. We must
3688 initialize this entry in the global offset table.
3689 Since the offset must always be a multiple of 8,
3690 we use the least significant bit to record
3691 whether we have initialized it already.
3693 When doing a dynamic link, we create a .rela.got
3694 relocation entry to initialize the value. This
3695 is done in the finish_dynamic_symbol routine. */
3700 bfd_put_32 (output_bfd, relocation,
3701 base_got->contents + off);
3708 /* Adjust for static executables. */
3709 if (htab->elf.splt == NULL)
3710 relocation += gotplt->output_offset;
3714 relocation = (base_got->output_section->vma
3715 + base_got->output_offset + off
3716 - gotplt->output_section->vma
3717 - gotplt->output_offset);
3718 /* Adjust for static executables. */
3719 if (htab->elf.splt == NULL)
3720 relocation += gotplt->output_offset;
3726 relocation -= (gotplt->output_section->vma
3727 + gotplt->output_offset);
3732 eh = (struct elf_i386_link_hash_entry *) h;
3736 /* Relocation is to the entry for this symbol in the global
3738 if (htab->elf.sgot == NULL)
3745 off = h->got.offset;
3746 dyn = htab->elf.dynamic_sections_created;
3747 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
3748 bfd_link_pic (info),
3750 || (bfd_link_pic (info)
3751 && SYMBOL_REFERENCES_LOCAL (info, h))
3752 || (ELF_ST_VISIBILITY (h->other)
3753 && h->root.type == bfd_link_hash_undefweak))
3755 /* This is actually a static link, or it is a
3756 -Bsymbolic link and the symbol is defined
3757 locally, or the symbol was forced to be local
3758 because of a version file. We must initialize
3759 this entry in the global offset table. Since the
3760 offset must always be a multiple of 4, we use the
3761 least significant bit to record whether we have
3762 initialized it already.
3764 When doing a dynamic link, we create a .rel.got
3765 relocation entry to initialize the value. This
3766 is done in the finish_dynamic_symbol routine. */
3771 bfd_put_32 (output_bfd, relocation,
3772 htab->elf.sgot->contents + off);
3777 unresolved_reloc = FALSE;
3781 if (local_got_offsets == NULL)
3784 off = local_got_offsets[r_symndx];
3786 /* The offset must always be a multiple of 4. We use
3787 the least significant bit to record whether we have
3788 already generated the necessary reloc. */
3793 bfd_put_32 (output_bfd, relocation,
3794 htab->elf.sgot->contents + off);
3796 if (bfd_link_pic (info))
3799 Elf_Internal_Rela outrel;
3801 s = htab->elf.srelgot;
3805 outrel.r_offset = (htab->elf.sgot->output_section->vma
3806 + htab->elf.sgot->output_offset
3808 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3809 elf_append_rel (output_bfd, s, &outrel);
3812 local_got_offsets[r_symndx] |= 1;
3816 if (off >= (bfd_vma) -2)
3819 relocation = htab->elf.sgot->output_section->vma
3820 + htab->elf.sgot->output_offset + off
3821 - htab->elf.sgotplt->output_section->vma
3822 - htab->elf.sgotplt->output_offset;
3826 /* Relocation is relative to the start of the global offset
3829 /* Check to make sure it isn't a protected function or data
3830 symbol for shared library since it may not be local when
3831 used as function address or with copy relocation. We also
3832 need to make sure that a symbol is referenced locally. */
3833 if (!bfd_link_executable (info) && h)
3835 if (!h->def_regular)
3839 switch (ELF_ST_VISIBILITY (h->other))
3842 v = _("hidden symbol");
3845 v = _("internal symbol");
3848 v = _("protected symbol");
3855 (*_bfd_error_handler)
3856 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3857 input_bfd, v, h->root.root.string);
3858 bfd_set_error (bfd_error_bad_value);
3861 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
3862 && (h->type == STT_FUNC
3863 || h->type == STT_OBJECT)
3864 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3866 (*_bfd_error_handler)
3867 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
3869 h->type == STT_FUNC ? "function" : "data",
3870 h->root.root.string);
3871 bfd_set_error (bfd_error_bad_value);
3876 /* Note that sgot is not involved in this
3877 calculation. We always want the start of .got.plt. If we
3878 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3879 permitted by the ABI, we might have to change this
3881 relocation -= htab->elf.sgotplt->output_section->vma
3882 + htab->elf.sgotplt->output_offset;
3886 /* Use global offset table as symbol value. */
3887 relocation = htab->elf.sgotplt->output_section->vma
3888 + htab->elf.sgotplt->output_offset;
3889 unresolved_reloc = FALSE;
3893 /* Relocation is to the entry for this symbol in the
3894 procedure linkage table. */
3896 /* Resolve a PLT32 reloc against a local symbol directly,
3897 without using the procedure linkage table. */
3901 if ((h->plt.offset == (bfd_vma) -1
3902 && eh->plt_got.offset == (bfd_vma) -1)
3903 || htab->elf.splt == NULL)
3905 /* We didn't make a PLT entry for this symbol. This
3906 happens when statically linking PIC code, or when
3907 using -Bsymbolic. */
3911 if (h->plt.offset != (bfd_vma) -1)
3913 resolved_plt = htab->elf.splt;
3914 plt_offset = h->plt.offset;
3918 resolved_plt = htab->plt_got;
3919 plt_offset = eh->plt_got.offset;
3922 relocation = (resolved_plt->output_section->vma
3923 + resolved_plt->output_offset
3925 unresolved_reloc = FALSE;
3929 /* Set to symbol size. */
3930 relocation = st_size;
3935 if ((input_section->flags & SEC_ALLOC) == 0
3939 /* Copy dynamic function pointer relocations. */
3940 if ((bfd_link_pic (info)
3942 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3943 || h->root.type != bfd_link_hash_undefweak)
3944 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
3945 || !SYMBOL_CALLS_LOCAL (info, h)))
3946 || (ELIMINATE_COPY_RELOCS
3947 && !bfd_link_pic (info)
3950 && (!h->non_got_ref || eh->func_pointer_refcount > 0)
3953 || h->root.type == bfd_link_hash_undefweak
3954 || h->root.type == bfd_link_hash_undefined)))
3956 Elf_Internal_Rela outrel;
3957 bfd_boolean skip, relocate;
3960 /* When generating a shared object, these relocations
3961 are copied into the output file to be resolved at run
3968 _bfd_elf_section_offset (output_bfd, info, input_section,
3970 if (outrel.r_offset == (bfd_vma) -1)
3972 else if (outrel.r_offset == (bfd_vma) -2)
3973 skip = TRUE, relocate = TRUE;
3974 outrel.r_offset += (input_section->output_section->vma
3975 + input_section->output_offset);
3978 memset (&outrel, 0, sizeof outrel);
3981 && (r_type == R_386_PC32
3982 || !bfd_link_pic (info)
3983 || !SYMBOLIC_BIND (info, h)
3984 || !h->def_regular))
3985 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3988 /* This symbol is local, or marked to become local. */
3990 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3993 sreloc = elf_section_data (input_section)->sreloc;
3995 if (sreloc == NULL || sreloc->contents == NULL)
3997 r = bfd_reloc_notsupported;
3998 goto check_relocation_error;
4001 elf_append_rel (output_bfd, sreloc, &outrel);
4003 /* If this reloc is against an external symbol, we do
4004 not want to fiddle with the addend. Otherwise, we
4005 need to include the symbol value so that it becomes
4006 an addend for the dynamic reloc. */
4013 if (!bfd_link_executable (info))
4015 Elf_Internal_Rela outrel;
4018 outrel.r_offset = rel->r_offset
4019 + input_section->output_section->vma
4020 + input_section->output_offset;
4021 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4022 sreloc = elf_section_data (input_section)->sreloc;
4025 elf_append_rel (output_bfd, sreloc, &outrel);
4030 case R_386_TLS_GOTDESC:
4031 case R_386_TLS_DESC_CALL:
4032 case R_386_TLS_IE_32:
4033 case R_386_TLS_GOTIE:
4034 tls_type = GOT_UNKNOWN;
4035 if (h == NULL && local_got_offsets)
4036 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
4038 tls_type = elf_i386_hash_entry(h)->tls_type;
4039 if (tls_type == GOT_TLS_IE)
4040 tls_type = GOT_TLS_IE_NEG;
4042 if (! elf_i386_tls_transition (info, input_bfd,
4043 input_section, contents,
4044 symtab_hdr, sym_hashes,
4045 &r_type, tls_type, rel,
4046 relend, h, r_symndx))
4049 if (r_type == R_386_TLS_LE_32)
4051 BFD_ASSERT (! unresolved_reloc);
4052 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4057 /* GD->LE transition. */
4058 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4061 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4063 movl %gs:0, %eax; subl $foo@tpoff, %eax
4064 (6 byte form of subl). */
4065 memcpy (contents + rel->r_offset - 3,
4066 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4067 roff = rel->r_offset + 5;
4071 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4073 movl %gs:0, %eax; subl $foo@tpoff, %eax
4074 (6 byte form of subl). */
4075 memcpy (contents + rel->r_offset - 2,
4076 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4077 roff = rel->r_offset + 6;
4079 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4081 /* Skip R_386_PC32/R_386_PLT32. */
4085 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4087 /* GDesc -> LE transition.
4088 It's originally something like:
4089 leal x@tlsdesc(%ebx), %eax
4093 Registers other than %eax may be set up here. */
4098 roff = rel->r_offset;
4099 val = bfd_get_8 (input_bfd, contents + roff - 1);
4101 /* Now modify the instruction as appropriate. */
4102 /* aoliva FIXME: remove the above and xor the byte
4104 bfd_put_8 (output_bfd, val ^ 0x86,
4105 contents + roff - 1);
4106 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4110 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4112 /* GDesc -> LE transition.
4120 roff = rel->r_offset;
4121 bfd_put_8 (output_bfd, 0x66, contents + roff);
4122 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4125 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4129 /* IE->LE transition:
4130 Originally it can be one of:
4138 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4141 /* movl foo, %eax. */
4142 bfd_put_8 (output_bfd, 0xb8,
4143 contents + rel->r_offset - 1);
4149 type = bfd_get_8 (input_bfd,
4150 contents + rel->r_offset - 2);
4155 bfd_put_8 (output_bfd, 0xc7,
4156 contents + rel->r_offset - 2);
4157 bfd_put_8 (output_bfd,
4158 0xc0 | ((val >> 3) & 7),
4159 contents + rel->r_offset - 1);
4163 bfd_put_8 (output_bfd, 0x81,
4164 contents + rel->r_offset - 2);
4165 bfd_put_8 (output_bfd,
4166 0xc0 | ((val >> 3) & 7),
4167 contents + rel->r_offset - 1);
4174 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4175 contents + rel->r_offset);
4180 unsigned int val, type;
4182 /* {IE_32,GOTIE}->LE transition:
4183 Originally it can be one of:
4184 subl foo(%reg1), %reg2
4185 movl foo(%reg1), %reg2
4186 addl foo(%reg1), %reg2
4189 movl $foo, %reg2 (6 byte form)
4190 addl $foo, %reg2. */
4191 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4192 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4196 bfd_put_8 (output_bfd, 0xc7,
4197 contents + rel->r_offset - 2);
4198 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4199 contents + rel->r_offset - 1);
4201 else if (type == 0x2b)
4204 bfd_put_8 (output_bfd, 0x81,
4205 contents + rel->r_offset - 2);
4206 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4207 contents + rel->r_offset - 1);
4209 else if (type == 0x03)
4212 bfd_put_8 (output_bfd, 0x81,
4213 contents + rel->r_offset - 2);
4214 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4215 contents + rel->r_offset - 1);
4219 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4220 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4221 contents + rel->r_offset);
4223 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4224 contents + rel->r_offset);
4229 if (htab->elf.sgot == NULL)
4234 off = h->got.offset;
4235 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4239 if (local_got_offsets == NULL)
4242 off = local_got_offsets[r_symndx];
4243 offplt = local_tlsdesc_gotents[r_symndx];
4250 Elf_Internal_Rela outrel;
4254 if (htab->elf.srelgot == NULL)
4257 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4259 if (GOT_TLS_GDESC_P (tls_type))
4262 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4263 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4264 <= htab->elf.sgotplt->size);
4265 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4266 + htab->elf.sgotplt->output_offset
4268 + htab->sgotplt_jump_table_size);
4269 sreloc = htab->elf.srelplt;
4270 loc = sreloc->contents;
4271 loc += (htab->next_tls_desc_index++
4272 * sizeof (Elf32_External_Rel));
4273 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4274 <= sreloc->contents + sreloc->size);
4275 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4278 BFD_ASSERT (! unresolved_reloc);
4279 bfd_put_32 (output_bfd,
4280 relocation - elf_i386_dtpoff_base (info),
4281 htab->elf.sgotplt->contents + offplt
4282 + htab->sgotplt_jump_table_size + 4);
4286 bfd_put_32 (output_bfd, 0,
4287 htab->elf.sgotplt->contents + offplt
4288 + htab->sgotplt_jump_table_size + 4);
4292 sreloc = htab->elf.srelgot;
4294 outrel.r_offset = (htab->elf.sgot->output_section->vma
4295 + htab->elf.sgot->output_offset + off);
4297 if (GOT_TLS_GD_P (tls_type))
4298 dr_type = R_386_TLS_DTPMOD32;
4299 else if (GOT_TLS_GDESC_P (tls_type))
4301 else if (tls_type == GOT_TLS_IE_POS)
4302 dr_type = R_386_TLS_TPOFF;
4304 dr_type = R_386_TLS_TPOFF32;
4306 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4307 bfd_put_32 (output_bfd,
4308 relocation - elf_i386_dtpoff_base (info),
4309 htab->elf.sgot->contents + off);
4310 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4311 bfd_put_32 (output_bfd,
4312 elf_i386_dtpoff_base (info) - relocation,
4313 htab->elf.sgot->contents + off);
4314 else if (dr_type != R_386_TLS_DESC)
4315 bfd_put_32 (output_bfd, 0,
4316 htab->elf.sgot->contents + off);
4317 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4319 elf_append_rel (output_bfd, sreloc, &outrel);
4321 if (GOT_TLS_GD_P (tls_type))
4325 BFD_ASSERT (! unresolved_reloc);
4326 bfd_put_32 (output_bfd,
4327 relocation - elf_i386_dtpoff_base (info),
4328 htab->elf.sgot->contents + off + 4);
4332 bfd_put_32 (output_bfd, 0,
4333 htab->elf.sgot->contents + off + 4);
4334 outrel.r_info = ELF32_R_INFO (indx,
4335 R_386_TLS_DTPOFF32);
4336 outrel.r_offset += 4;
4337 elf_append_rel (output_bfd, sreloc, &outrel);
4340 else if (tls_type == GOT_TLS_IE_BOTH)
4342 bfd_put_32 (output_bfd,
4344 ? relocation - elf_i386_dtpoff_base (info)
4346 htab->elf.sgot->contents + off + 4);
4347 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4348 outrel.r_offset += 4;
4349 elf_append_rel (output_bfd, sreloc, &outrel);
4356 local_got_offsets[r_symndx] |= 1;
4359 if (off >= (bfd_vma) -2
4360 && ! GOT_TLS_GDESC_P (tls_type))
4362 if (r_type == R_386_TLS_GOTDESC
4363 || r_type == R_386_TLS_DESC_CALL)
4365 relocation = htab->sgotplt_jump_table_size + offplt;
4366 unresolved_reloc = FALSE;
4368 else if (r_type == ELF32_R_TYPE (rel->r_info))
4370 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4371 + htab->elf.sgotplt->output_offset;
4372 relocation = htab->elf.sgot->output_section->vma
4373 + htab->elf.sgot->output_offset + off - g_o_t;
4374 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4375 && tls_type == GOT_TLS_IE_BOTH)
4377 if (r_type == R_386_TLS_IE)
4378 relocation += g_o_t;
4379 unresolved_reloc = FALSE;
4381 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4383 unsigned int val, type;
4386 /* GD->IE transition. */
4387 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4388 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4391 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4393 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4395 roff = rel->r_offset - 3;
4399 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4401 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4402 roff = rel->r_offset - 2;
4404 memcpy (contents + roff,
4405 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4406 contents[roff + 7] = 0x80 | (val & 7);
4407 /* If foo is used only with foo@gotntpoff(%reg) and
4408 foo@indntpoff, but not with foo@gottpoff(%reg), change
4409 subl $foo@gottpoff(%reg), %eax
4411 addl $foo@gotntpoff(%reg), %eax. */
4412 if (tls_type == GOT_TLS_IE_POS)
4413 contents[roff + 6] = 0x03;
4414 bfd_put_32 (output_bfd,
4415 htab->elf.sgot->output_section->vma
4416 + htab->elf.sgot->output_offset + off
4417 - htab->elf.sgotplt->output_section->vma
4418 - htab->elf.sgotplt->output_offset,
4419 contents + roff + 8);
4420 /* Skip R_386_PLT32. */
4424 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4426 /* GDesc -> IE transition.
4427 It's originally something like:
4428 leal x@tlsdesc(%ebx), %eax
4431 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4433 movl x@gottpoff(%ebx), %eax # before negl %eax
4435 Registers other than %eax may be set up here. */
4439 /* First, make sure it's a leal adding ebx to a 32-bit
4440 offset into any register, although it's probably
4441 almost always going to be eax. */
4442 roff = rel->r_offset;
4444 /* Now modify the instruction as appropriate. */
4445 /* To turn a leal into a movl in the form we use it, it
4446 suffices to change the first byte from 0x8d to 0x8b.
4447 aoliva FIXME: should we decide to keep the leal, all
4448 we have to do is remove the statement below, and
4449 adjust the relaxation of R_386_TLS_DESC_CALL. */
4450 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4452 if (tls_type == GOT_TLS_IE_BOTH)
4455 bfd_put_32 (output_bfd,
4456 htab->elf.sgot->output_section->vma
4457 + htab->elf.sgot->output_offset + off
4458 - htab->elf.sgotplt->output_section->vma
4459 - htab->elf.sgotplt->output_offset,
4463 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4465 /* GDesc -> IE transition.
4473 depending on how we transformed the TLS_GOTDESC above.
4478 roff = rel->r_offset;
4480 /* Now modify the instruction as appropriate. */
4481 if (tls_type != GOT_TLS_IE_NEG)
4484 bfd_put_8 (output_bfd, 0x66, contents + roff);
4485 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4490 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4491 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4501 if (! elf_i386_tls_transition (info, input_bfd,
4502 input_section, contents,
4503 symtab_hdr, sym_hashes,
4504 &r_type, GOT_UNKNOWN, rel,
4505 relend, h, r_symndx))
4508 if (r_type != R_386_TLS_LDM)
4510 /* LD->LE transition:
4511 leal foo(%reg), %eax; call ___tls_get_addr.
4513 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4514 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4515 memcpy (contents + rel->r_offset - 2,
4516 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4517 /* Skip R_386_PC32/R_386_PLT32. */
4522 if (htab->elf.sgot == NULL)
4525 off = htab->tls_ldm_got.offset;
4530 Elf_Internal_Rela outrel;
4532 if (htab->elf.srelgot == NULL)
4535 outrel.r_offset = (htab->elf.sgot->output_section->vma
4536 + htab->elf.sgot->output_offset + off);
4538 bfd_put_32 (output_bfd, 0,
4539 htab->elf.sgot->contents + off);
4540 bfd_put_32 (output_bfd, 0,
4541 htab->elf.sgot->contents + off + 4);
4542 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4543 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4544 htab->tls_ldm_got.offset |= 1;
4546 relocation = htab->elf.sgot->output_section->vma
4547 + htab->elf.sgot->output_offset + off
4548 - htab->elf.sgotplt->output_section->vma
4549 - htab->elf.sgotplt->output_offset;
4550 unresolved_reloc = FALSE;
4553 case R_386_TLS_LDO_32:
4554 if (!bfd_link_executable (info)
4555 || (input_section->flags & SEC_CODE) == 0)
4556 relocation -= elf_i386_dtpoff_base (info);
4558 /* When converting LDO to LE, we must negate. */
4559 relocation = -elf_i386_tpoff (info, relocation);
4562 case R_386_TLS_LE_32:
4564 if (!bfd_link_executable (info))
4566 Elf_Internal_Rela outrel;
4569 outrel.r_offset = rel->r_offset
4570 + input_section->output_section->vma
4571 + input_section->output_offset;
4572 if (h != NULL && h->dynindx != -1)
4576 if (r_type == R_386_TLS_LE_32)
4577 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4579 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4580 sreloc = elf_section_data (input_section)->sreloc;
4583 elf_append_rel (output_bfd, sreloc, &outrel);
4586 else if (r_type == R_386_TLS_LE_32)
4587 relocation = elf_i386_dtpoff_base (info) - relocation;
4589 relocation -= elf_i386_dtpoff_base (info);
4591 else if (r_type == R_386_TLS_LE_32)
4592 relocation = elf_i386_tpoff (info, relocation);
4594 relocation = -elf_i386_tpoff (info, relocation);
4601 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4602 because such sections are not SEC_ALLOC and thus ld.so will
4603 not process them. */
4604 if (unresolved_reloc
4605 && !((input_section->flags & SEC_DEBUGGING) != 0
4607 && _bfd_elf_section_offset (output_bfd, info, input_section,
4608 rel->r_offset) != (bfd_vma) -1)
4610 (*_bfd_error_handler)
4611 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4614 (long) rel->r_offset,
4616 h->root.root.string);
4621 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4622 contents, rel->r_offset,
4625 check_relocation_error:
4626 if (r != bfd_reloc_ok)
4631 name = h->root.root.string;
4634 name = bfd_elf_string_from_elf_section (input_bfd,
4635 symtab_hdr->sh_link,
4640 name = bfd_section_name (input_bfd, sec);
4643 if (r == bfd_reloc_overflow)
4645 if (! ((*info->callbacks->reloc_overflow)
4646 (info, (h ? &h->root : NULL), name, howto->name,
4647 (bfd_vma) 0, input_bfd, input_section,
4653 (*_bfd_error_handler)
4654 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4655 input_bfd, input_section,
4656 (long) rel->r_offset, name, (int) r);
4665 /* Finish up dynamic symbol handling. We set the contents of various
4666 dynamic sections here. */
4669 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4670 struct bfd_link_info *info,
4671 struct elf_link_hash_entry *h,
4672 Elf_Internal_Sym *sym)
4674 struct elf_i386_link_hash_table *htab;
4675 unsigned plt_entry_size;
4676 const struct elf_i386_backend_data *abed;
4677 struct elf_i386_link_hash_entry *eh;
4679 htab = elf_i386_hash_table (info);
4683 abed = get_elf_i386_backend_data (output_bfd);
4684 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
4686 eh = (struct elf_i386_link_hash_entry *) h;
4688 if (h->plt.offset != (bfd_vma) -1)
4692 Elf_Internal_Rela rel;
4694 asection *plt, *gotplt, *relplt;
4696 /* When building a static executable, use .iplt, .igot.plt and
4697 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4698 if (htab->elf.splt != NULL)
4700 plt = htab->elf.splt;
4701 gotplt = htab->elf.sgotplt;
4702 relplt = htab->elf.srelplt;
4706 plt = htab->elf.iplt;
4707 gotplt = htab->elf.igotplt;
4708 relplt = htab->elf.irelplt;
4711 /* This symbol has an entry in the procedure linkage table. Set
4714 if ((h->dynindx == -1
4715 && !((h->forced_local || bfd_link_executable (info))
4717 && h->type == STT_GNU_IFUNC))
4723 /* Get the index in the procedure linkage table which
4724 corresponds to this symbol. This is the index of this symbol
4725 in all the symbols for which we are making plt entries. The
4726 first entry in the procedure linkage table is reserved.
4728 Get the offset into the .got table of the entry that
4729 corresponds to this function. Each .got entry is 4 bytes.
4730 The first three are reserved.
4732 For static executables, we don't reserve anything. */
4734 if (plt == htab->elf.splt)
4736 got_offset = h->plt.offset / plt_entry_size - 1;
4737 got_offset = (got_offset + 3) * 4;
4741 got_offset = h->plt.offset / plt_entry_size;
4742 got_offset = got_offset * 4;
4745 /* Fill in the entry in the procedure linkage table. */
4746 if (! bfd_link_pic (info))
4748 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
4749 abed->plt->plt_entry_size);
4750 bfd_put_32 (output_bfd,
4751 (gotplt->output_section->vma
4752 + gotplt->output_offset
4754 plt->contents + h->plt.offset
4755 + abed->plt->plt_got_offset);
4757 if (abed->is_vxworks)
4759 int s, k, reloc_index;
4761 /* Create the R_386_32 relocation referencing the GOT
4762 for this PLT entry. */
4764 /* S: Current slot number (zero-based). */
4765 s = ((h->plt.offset - abed->plt->plt_entry_size)
4766 / abed->plt->plt_entry_size);
4767 /* K: Number of relocations for PLTResolve. */
4768 if (bfd_link_pic (info))
4769 k = PLTRESOLVE_RELOCS_SHLIB;
4771 k = PLTRESOLVE_RELOCS;
4772 /* Skip the PLTresolve relocations, and the relocations for
4773 the other PLT slots. */
4774 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4775 loc = (htab->srelplt2->contents + reloc_index
4776 * sizeof (Elf32_External_Rel));
4778 rel.r_offset = (htab->elf.splt->output_section->vma
4779 + htab->elf.splt->output_offset
4780 + h->plt.offset + 2),
4781 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4782 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4784 /* Create the R_386_32 relocation referencing the beginning of
4785 the PLT for this GOT entry. */
4786 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4787 + htab->elf.sgotplt->output_offset
4789 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4790 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4791 loc + sizeof (Elf32_External_Rel));
4796 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
4797 abed->plt->plt_entry_size);
4798 bfd_put_32 (output_bfd, got_offset,
4799 plt->contents + h->plt.offset
4800 + abed->plt->plt_got_offset);
4803 /* Fill in the entry in the global offset table. */
4804 bfd_put_32 (output_bfd,
4805 (plt->output_section->vma
4806 + plt->output_offset
4808 + abed->plt->plt_lazy_offset),
4809 gotplt->contents + got_offset);
4811 /* Fill in the entry in the .rel.plt section. */
4812 rel.r_offset = (gotplt->output_section->vma
4813 + gotplt->output_offset
4815 if (h->dynindx == -1
4816 || ((bfd_link_executable (info)
4817 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4819 && h->type == STT_GNU_IFUNC))
4821 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4822 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4823 in the .got.plt section. */
4824 bfd_put_32 (output_bfd,
4825 (h->root.u.def.value
4826 + h->root.u.def.section->output_section->vma
4827 + h->root.u.def.section->output_offset),
4828 gotplt->contents + got_offset);
4829 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4830 /* R_386_IRELATIVE comes last. */
4831 plt_index = htab->next_irelative_index--;
4835 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4836 plt_index = htab->next_jump_slot_index++;
4838 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4839 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4841 /* Don't fill PLT entry for static executables. */
4842 if (plt == htab->elf.splt)
4844 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4845 plt->contents + h->plt.offset
4846 + abed->plt->plt_reloc_offset);
4847 bfd_put_32 (output_bfd, - (h->plt.offset
4848 + abed->plt->plt_plt_offset + 4),
4849 plt->contents + h->plt.offset
4850 + abed->plt->plt_plt_offset);
4853 else if (eh->plt_got.offset != (bfd_vma) -1)
4855 bfd_vma got_offset, plt_offset;
4856 asection *plt, *got, *gotplt;
4857 const bfd_byte *got_plt_entry;
4859 /* Offset of displacement of the indirect jump. */
4860 bfd_vma plt_got_offset = 2;
4862 /* Set the entry in the GOT procedure linkage table. */
4863 plt = htab->plt_got;
4864 got = htab->elf.sgot;
4865 gotplt = htab->elf.sgotplt;
4866 got_offset = h->got.offset;
4868 if (got_offset == (bfd_vma) -1
4874 /* Fill in the entry in the GOT procedure linkage table. */
4875 if (! bfd_link_pic (info))
4877 got_plt_entry = elf_i386_got_plt_entry;
4878 got_offset += got->output_section->vma + got->output_offset;
4882 got_plt_entry = elf_i386_pic_got_plt_entry;
4883 got_offset += (got->output_section->vma
4884 + got->output_offset
4885 - gotplt->output_section->vma
4886 - gotplt->output_offset);
4889 plt_offset = eh->plt_got.offset;
4890 memcpy (plt->contents + plt_offset, got_plt_entry,
4891 sizeof (elf_i386_got_plt_entry));
4892 bfd_put_32 (output_bfd, got_offset,
4893 plt->contents + plt_offset + plt_got_offset);
4897 && (h->plt.offset != (bfd_vma) -1
4898 || eh->plt_got.offset != (bfd_vma) -1))
4900 /* Mark the symbol as undefined, rather than as defined in
4901 the .plt section. Leave the value if there were any
4902 relocations where pointer equality matters (this is a clue
4903 for the dynamic linker, to make function pointer
4904 comparisons work between an application and shared
4905 library), otherwise set it to zero. If a function is only
4906 called from a binary, there is no need to slow down
4907 shared libraries because of that. */
4908 sym->st_shndx = SHN_UNDEF;
4909 if (!h->pointer_equality_needed)
4913 if (h->got.offset != (bfd_vma) -1
4914 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4915 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4917 Elf_Internal_Rela rel;
4919 /* This symbol has an entry in the global offset table. Set it
4922 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4925 rel.r_offset = (htab->elf.sgot->output_section->vma
4926 + htab->elf.sgot->output_offset
4927 + (h->got.offset & ~(bfd_vma) 1));
4929 /* If this is a static link, or it is a -Bsymbolic link and the
4930 symbol is defined locally or was forced to be local because
4931 of a version file, we just want to emit a RELATIVE reloc.
4932 The entry in the global offset table will already have been
4933 initialized in the relocate_section function. */
4935 && h->type == STT_GNU_IFUNC)
4937 if (bfd_link_pic (info))
4939 /* Generate R_386_GLOB_DAT. */
4946 if (!h->pointer_equality_needed)
4949 /* For non-shared object, we can't use .got.plt, which
4950 contains the real function addres if we need pointer
4951 equality. We load the GOT entry with the PLT entry. */
4952 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4953 bfd_put_32 (output_bfd,
4954 (plt->output_section->vma
4955 + plt->output_offset + h->plt.offset),
4956 htab->elf.sgot->contents + h->got.offset);
4960 else if (bfd_link_pic (info)
4961 && SYMBOL_REFERENCES_LOCAL (info, h))
4963 BFD_ASSERT((h->got.offset & 1) != 0);
4964 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4968 BFD_ASSERT((h->got.offset & 1) == 0);
4970 bfd_put_32 (output_bfd, (bfd_vma) 0,
4971 htab->elf.sgot->contents + h->got.offset);
4972 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4975 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
4980 Elf_Internal_Rela rel;
4982 /* This symbol needs a copy reloc. Set it up. */
4984 if (h->dynindx == -1
4985 || (h->root.type != bfd_link_hash_defined
4986 && h->root.type != bfd_link_hash_defweak)
4987 || htab->srelbss == NULL)
4990 rel.r_offset = (h->root.u.def.value
4991 + h->root.u.def.section->output_section->vma
4992 + h->root.u.def.section->output_offset);
4993 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4994 elf_append_rel (output_bfd, htab->srelbss, &rel);
5000 /* Finish up local dynamic symbol handling. We set the contents of
5001 various dynamic sections here. */
5004 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5006 struct elf_link_hash_entry *h
5007 = (struct elf_link_hash_entry *) *slot;
5008 struct bfd_link_info *info
5009 = (struct bfd_link_info *) inf;
5011 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5015 /* Used to decide how to sort relocs in an optimal manner for the
5016 dynamic linker, before writing them out. */
5018 static enum elf_reloc_type_class
5019 elf_i386_reloc_type_class (const struct bfd_link_info *info,
5020 const asection *rel_sec ATTRIBUTE_UNUSED,
5021 const Elf_Internal_Rela *rela)
5023 bfd *abfd = info->output_bfd;
5024 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5025 struct elf_link_hash_table *htab = elf_hash_table (info);
5026 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5027 Elf_Internal_Sym sym;
5029 if (htab->dynsym == NULL
5030 || !bed->s->swap_symbol_in (abfd,
5031 (htab->dynsym->contents
5032 + r_symndx * sizeof (Elf32_External_Sym)),
5036 /* Check relocation against STT_GNU_IFUNC symbol. */
5037 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5038 return reloc_class_ifunc;
5040 switch (ELF32_R_TYPE (rela->r_info))
5042 case R_386_RELATIVE:
5043 return reloc_class_relative;
5044 case R_386_JUMP_SLOT:
5045 return reloc_class_plt;
5047 return reloc_class_copy;
5049 return reloc_class_normal;
5053 /* Finish up the dynamic sections. */
5056 elf_i386_finish_dynamic_sections (bfd *output_bfd,
5057 struct bfd_link_info *info)
5059 struct elf_i386_link_hash_table *htab;
5062 const struct elf_i386_backend_data *abed;
5064 htab = elf_i386_hash_table (info);
5068 dynobj = htab->elf.dynobj;
5069 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5070 abed = get_elf_i386_backend_data (output_bfd);
5072 if (htab->elf.dynamic_sections_created)
5074 Elf32_External_Dyn *dyncon, *dynconend;
5076 if (sdyn == NULL || htab->elf.sgot == NULL)
5079 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5080 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5081 for (; dyncon < dynconend; dyncon++)
5083 Elf_Internal_Dyn dyn;
5086 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5091 if (abed->is_vxworks
5092 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5097 s = htab->elf.sgotplt;
5098 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5102 s = htab->elf.srelplt;
5103 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5107 s = htab->elf.srelplt;
5108 dyn.d_un.d_val = s->size;
5112 /* My reading of the SVR4 ABI indicates that the
5113 procedure linkage table relocs (DT_JMPREL) should be
5114 included in the overall relocs (DT_REL). This is
5115 what Solaris does. However, UnixWare can not handle
5116 that case. Therefore, we override the DT_RELSZ entry
5117 here to make it not include the JMPREL relocs. */
5118 s = htab->elf.srelplt;
5121 dyn.d_un.d_val -= s->size;
5125 /* We may not be using the standard ELF linker script.
5126 If .rel.plt is the first .rel section, we adjust
5127 DT_REL to not include it. */
5128 s = htab->elf.srelplt;
5131 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
5133 dyn.d_un.d_ptr += s->size;
5137 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5140 /* Fill in the first entry in the procedure linkage table. */
5141 if (htab->elf.splt && htab->elf.splt->size > 0)
5143 if (bfd_link_pic (info))
5145 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5146 abed->plt->plt0_entry_size);
5147 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5148 abed->plt0_pad_byte,
5149 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5153 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5154 abed->plt->plt0_entry_size);
5155 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5156 abed->plt0_pad_byte,
5157 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5158 bfd_put_32 (output_bfd,
5159 (htab->elf.sgotplt->output_section->vma
5160 + htab->elf.sgotplt->output_offset
5162 htab->elf.splt->contents
5163 + abed->plt->plt0_got1_offset);
5164 bfd_put_32 (output_bfd,
5165 (htab->elf.sgotplt->output_section->vma
5166 + htab->elf.sgotplt->output_offset
5168 htab->elf.splt->contents
5169 + abed->plt->plt0_got2_offset);
5171 if (abed->is_vxworks)
5173 Elf_Internal_Rela rel;
5175 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5176 On IA32 we use REL relocations so the addend goes in
5177 the PLT directly. */
5178 rel.r_offset = (htab->elf.splt->output_section->vma
5179 + htab->elf.splt->output_offset
5180 + abed->plt->plt0_got1_offset);
5181 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5182 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5183 htab->srelplt2->contents);
5184 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5185 rel.r_offset = (htab->elf.splt->output_section->vma
5186 + htab->elf.splt->output_offset
5187 + abed->plt->plt0_got2_offset);
5188 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5189 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5190 htab->srelplt2->contents +
5191 sizeof (Elf32_External_Rel));
5195 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5196 really seem like the right value. */
5197 elf_section_data (htab->elf.splt->output_section)
5198 ->this_hdr.sh_entsize = 4;
5200 /* Correct the .rel.plt.unloaded relocations. */
5201 if (abed->is_vxworks && !bfd_link_pic (info))
5203 int num_plts = (htab->elf.splt->size
5204 / abed->plt->plt_entry_size) - 1;
5207 p = htab->srelplt2->contents;
5208 if (bfd_link_pic (info))
5209 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5211 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5213 for (; num_plts; num_plts--)
5215 Elf_Internal_Rela rel;
5216 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5217 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5218 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5219 p += sizeof (Elf32_External_Rel);
5221 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5222 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5223 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5224 p += sizeof (Elf32_External_Rel);
5230 if (htab->elf.sgotplt)
5232 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5234 (*_bfd_error_handler)
5235 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5239 /* Fill in the first three entries in the global offset table. */
5240 if (htab->elf.sgotplt->size > 0)
5242 bfd_put_32 (output_bfd,
5244 : sdyn->output_section->vma + sdyn->output_offset),
5245 htab->elf.sgotplt->contents);
5246 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5247 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5250 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5253 /* Adjust .eh_frame for .plt section. */
5254 if (htab->plt_eh_frame != NULL
5255 && htab->plt_eh_frame->contents != NULL)
5257 if (htab->elf.splt != NULL
5258 && htab->elf.splt->size != 0
5259 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5260 && htab->elf.splt->output_section != NULL
5261 && htab->plt_eh_frame->output_section != NULL)
5263 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5264 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5265 + htab->plt_eh_frame->output_offset
5266 + PLT_FDE_START_OFFSET;
5267 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5268 htab->plt_eh_frame->contents
5269 + PLT_FDE_START_OFFSET);
5271 if (htab->plt_eh_frame->sec_info_type
5272 == SEC_INFO_TYPE_EH_FRAME)
5274 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5276 htab->plt_eh_frame->contents))
5281 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5282 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5284 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5285 htab_traverse (htab->loc_hash_table,
5286 elf_i386_finish_local_dynamic_symbol,
5292 /* Return an array of PLT entry symbol values. */
5295 elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5298 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5301 bfd_vma *plt_sym_val;
5303 bfd_byte *plt_contents;
5304 const struct elf_i386_backend_data *bed
5305 = get_elf_i386_backend_data (abfd);
5306 Elf_Internal_Shdr *hdr;
5308 /* Get the .plt section contents. */
5309 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5310 if (plt_contents == NULL)
5312 if (!bfd_get_section_contents (abfd, (asection *) plt,
5313 plt_contents, 0, plt->size))
5316 free (plt_contents);
5320 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5321 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5324 hdr = &elf_section_data (relplt)->this_hdr;
5325 count = relplt->size / hdr->sh_entsize;
5327 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5328 if (plt_sym_val == NULL)
5331 for (i = 0; i < count; i++)
5332 plt_sym_val[i] = -1;
5334 plt_offset = bed->plt->plt_entry_size;
5335 p = relplt->relocation;
5336 for (i = 0; i < count; i++, p++)
5340 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5341 if (p->howto == NULL)
5344 if (p->howto->type != R_386_JUMP_SLOT
5345 && p->howto->type != R_386_IRELATIVE)
5348 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5349 + bed->plt->plt_reloc_offset));
5350 reloc_index /= sizeof (Elf32_External_Rel);
5351 if (reloc_index >= count)
5353 plt_sym_val[reloc_index] = plt->vma + plt_offset;
5354 plt_offset += bed->plt->plt_entry_size;
5356 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5358 if (plt_offset >= plt->size)
5362 free (plt_contents);
5367 /* Similar to _bfd_elf_get_synthetic_symtab. */
5370 elf_i386_get_synthetic_symtab (bfd *abfd,
5377 asection *plt = bfd_get_section_by_name (abfd, ".plt");
5378 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5379 dynsymcount, dynsyms, ret,
5381 elf_i386_get_plt_sym_val);
5384 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5387 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5389 if (h->plt.offset != (bfd_vma) -1
5391 && !h->pointer_equality_needed)
5394 return _bfd_elf_hash_symbol (h);
5397 /* Hook called by the linker routine which adds symbols from an object
5401 elf_i386_add_symbol_hook (bfd * abfd,
5402 struct bfd_link_info * info,
5403 Elf_Internal_Sym * sym,
5404 const char ** namep ATTRIBUTE_UNUSED,
5405 flagword * flagsp ATTRIBUTE_UNUSED,
5406 asection ** secp ATTRIBUTE_UNUSED,
5407 bfd_vma * valp ATTRIBUTE_UNUSED)
5409 if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE
5410 && (abfd->flags & DYNAMIC) == 0
5411 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
5412 elf_tdata (info->output_bfd)->has_gnu_symbols
5413 |= elf_gnu_symbol_unique;
5418 #define TARGET_LITTLE_SYM i386_elf32_vec
5419 #define TARGET_LITTLE_NAME "elf32-i386"
5420 #define ELF_ARCH bfd_arch_i386
5421 #define ELF_TARGET_ID I386_ELF_DATA
5422 #define ELF_MACHINE_CODE EM_386
5423 #define ELF_MAXPAGESIZE 0x1000
5425 #define elf_backend_can_gc_sections 1
5426 #define elf_backend_can_refcount 1
5427 #define elf_backend_want_got_plt 1
5428 #define elf_backend_plt_readonly 1
5429 #define elf_backend_want_plt_sym 0
5430 #define elf_backend_got_header_size 12
5431 #define elf_backend_plt_alignment 4
5432 #define elf_backend_extern_protected_data 1
5434 /* Support RELA for objdump of prelink objects. */
5435 #define elf_info_to_howto elf_i386_info_to_howto_rel
5436 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5438 #define bfd_elf32_mkobject elf_i386_mkobject
5440 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5441 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5442 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5443 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5444 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5446 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5447 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5448 #define elf_backend_check_relocs elf_i386_check_relocs
5449 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5450 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5451 #define elf_backend_fake_sections elf_i386_fake_sections
5452 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5453 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5454 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5455 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5456 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5457 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5458 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5459 #define elf_backend_relocate_section elf_i386_relocate_section
5460 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5461 #define elf_backend_always_size_sections elf_i386_always_size_sections
5462 #define elf_backend_omit_section_dynsym \
5463 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5464 #define elf_backend_hash_symbol elf_i386_hash_symbol
5465 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5467 #include "elf32-target.h"
5469 /* FreeBSD support. */
5471 #undef TARGET_LITTLE_SYM
5472 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5473 #undef TARGET_LITTLE_NAME
5474 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5476 #define ELF_OSABI ELFOSABI_FREEBSD
5478 /* The kernel recognizes executables as valid only if they carry a
5479 "FreeBSD" label in the ELF header. So we put this label on all
5480 executables and (for simplicity) also all other object files. */
5483 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5485 _bfd_elf_post_process_headers (abfd, info);
5487 #ifdef OLD_FREEBSD_ABI_LABEL
5489 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5490 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5491 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5496 #undef elf_backend_post_process_headers
5497 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5499 #define elf32_bed elf32_i386_fbsd_bed
5501 #undef elf_backend_add_symbol_hook
5503 #include "elf32-target.h"
5507 #undef TARGET_LITTLE_SYM
5508 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5509 #undef TARGET_LITTLE_NAME
5510 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5512 #undef elf_backend_post_process_headers
5514 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5515 objects won't be recognized. */
5519 #define elf32_bed elf32_i386_sol2_bed
5521 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5523 #undef elf_backend_static_tls_alignment
5524 #define elf_backend_static_tls_alignment 8
5526 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5528 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5530 #undef elf_backend_want_plt_sym
5531 #define elf_backend_want_plt_sym 1
5533 #include "elf32-target.h"
5535 /* Intel MCU support. */
5538 elf32_iamcu_elf_object_p (bfd *abfd)
5540 /* Set the right machine number for an IAMCU elf32 file. */
5541 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
5545 #undef TARGET_LITTLE_SYM
5546 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5547 #undef TARGET_LITTLE_NAME
5548 #define TARGET_LITTLE_NAME "elf32-iamcu"
5550 #define ELF_ARCH bfd_arch_iamcu
5552 #undef ELF_MACHINE_CODE
5553 #define ELF_MACHINE_CODE EM_IAMCU
5558 #define elf32_bed elf32_iamcu_bed
5560 #undef elf_backend_object_p
5561 #define elf_backend_object_p elf32_iamcu_elf_object_p
5563 #undef elf_backend_static_tls_alignment
5565 #undef elf_backend_want_plt_sym
5566 #define elf_backend_want_plt_sym 0
5568 #include "elf32-target.h"
5570 /* Restore defaults. */
5572 #define ELF_ARCH bfd_arch_i386
5573 #undef ELF_MACHINE_CODE
5574 #define ELF_MACHINE_CODE EM_386
5576 /* Native Client support. */
5578 #undef TARGET_LITTLE_SYM
5579 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5580 #undef TARGET_LITTLE_NAME
5581 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5583 #define elf32_bed elf32_i386_nacl_bed
5585 #undef ELF_MAXPAGESIZE
5586 #define ELF_MAXPAGESIZE 0x10000
5588 /* Restore defaults. */
5590 #undef elf_backend_want_plt_sym
5591 #define elf_backend_want_plt_sym 0
5592 #undef elf_backend_post_process_headers
5593 #undef elf_backend_static_tls_alignment
5595 /* NaCl uses substantially different PLT entries for the same effects. */
5597 #undef elf_backend_plt_alignment
5598 #define elf_backend_plt_alignment 5
5599 #define NACL_PLT_ENTRY_SIZE 64
5600 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5602 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5604 0xff, 0x35, /* pushl contents of address */
5605 0, 0, 0, 0, /* replaced with address of .got + 4. */
5606 0x8b, 0x0d, /* movl contents of address, %ecx */
5607 0, 0, 0, 0, /* replaced with address of .got + 8. */
5608 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5609 0xff, 0xe1 /* jmp *%ecx */
5612 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5614 0x8b, 0x0d, /* movl contents of address, %ecx */
5615 0, 0, 0, 0, /* replaced with GOT slot address. */
5616 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5617 0xff, 0xe1, /* jmp *%ecx */
5619 /* Pad to the next 32-byte boundary with nop instructions. */
5621 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5622 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5624 /* Lazy GOT entries point here (32-byte aligned). */
5625 0x68, /* pushl immediate */
5626 0, 0, 0, 0, /* replaced with reloc offset. */
5627 0xe9, /* jmp relative */
5628 0, 0, 0, 0, /* replaced with offset to .plt. */
5630 /* Pad to the next 32-byte boundary with nop instructions. */
5631 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5632 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5636 static const bfd_byte
5637 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5639 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5640 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5641 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5642 0xff, 0xe1, /* jmp *%ecx */
5644 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5645 so pad to that size with nop instructions. */
5646 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5649 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5651 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5652 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5653 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5654 0xff, 0xe1, /* jmp *%ecx */
5656 /* Pad to the next 32-byte boundary with nop instructions. */
5658 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5659 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5661 /* Lazy GOT entries point here (32-byte aligned). */
5662 0x68, /* pushl immediate */
5663 0, 0, 0, 0, /* replaced with offset into relocation table. */
5664 0xe9, /* jmp relative */
5665 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5667 /* Pad to the next 32-byte boundary with nop instructions. */
5668 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5669 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5673 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5675 #if (PLT_CIE_LENGTH != 20 \
5676 || PLT_FDE_LENGTH != 36 \
5677 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5678 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5679 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5681 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5682 0, 0, 0, 0, /* CIE ID */
5683 1, /* CIE version */
5684 'z', 'R', 0, /* Augmentation string */
5685 1, /* Code alignment factor */
5686 0x7c, /* Data alignment factor: -4 */
5687 8, /* Return address column */
5688 1, /* Augmentation size */
5689 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5690 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5691 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5692 DW_CFA_nop, DW_CFA_nop,
5694 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5695 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5696 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5697 0, 0, 0, 0, /* .plt size goes here */
5698 0, /* Augmentation size */
5699 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5700 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5701 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5702 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5703 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5704 13, /* Block length */
5705 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5706 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5707 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5708 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5709 DW_CFA_nop, DW_CFA_nop
5712 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
5714 elf_i386_nacl_plt0_entry, /* plt0_entry */
5715 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5716 2, /* plt0_got1_offset */
5717 8, /* plt0_got2_offset */
5718 elf_i386_nacl_plt_entry, /* plt_entry */
5719 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5720 2, /* plt_got_offset */
5721 33, /* plt_reloc_offset */
5722 38, /* plt_plt_offset */
5723 32, /* plt_lazy_offset */
5724 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5725 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5726 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5727 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
5730 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5732 &elf_i386_nacl_plt, /* plt */
5733 0x90, /* plt0_pad_byte: nop insn */
5738 elf32_i386_nacl_elf_object_p (bfd *abfd)
5740 /* Set the right machine number for a NaCl i386 ELF32 file. */
5741 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
5745 #undef elf_backend_arch_data
5746 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5748 #undef elf_backend_object_p
5749 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5750 #undef elf_backend_modify_segment_map
5751 #define elf_backend_modify_segment_map nacl_modify_segment_map
5752 #undef elf_backend_modify_program_headers
5753 #define elf_backend_modify_program_headers nacl_modify_program_headers
5754 #undef elf_backend_final_write_processing
5755 #define elf_backend_final_write_processing nacl_final_write_processing
5757 #include "elf32-target.h"
5759 /* Restore defaults. */
5760 #undef elf_backend_object_p
5761 #undef elf_backend_modify_segment_map
5762 #undef elf_backend_modify_program_headers
5763 #undef elf_backend_final_write_processing
5765 /* VxWorks support. */
5767 #undef TARGET_LITTLE_SYM
5768 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5769 #undef TARGET_LITTLE_NAME
5770 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5772 #undef elf_backend_plt_alignment
5773 #define elf_backend_plt_alignment 4
5775 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5777 &elf_i386_plt, /* plt */
5778 0x90, /* plt0_pad_byte */
5782 #undef elf_backend_arch_data
5783 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5785 #undef elf_backend_relocs_compatible
5786 #undef elf_backend_add_symbol_hook
5787 #define elf_backend_add_symbol_hook \
5788 elf_vxworks_add_symbol_hook
5789 #undef elf_backend_link_output_symbol_hook
5790 #define elf_backend_link_output_symbol_hook \
5791 elf_vxworks_link_output_symbol_hook
5792 #undef elf_backend_emit_relocs
5793 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5794 #undef elf_backend_final_write_processing
5795 #define elf_backend_final_write_processing \
5796 elf_vxworks_final_write_processing
5797 #undef elf_backend_static_tls_alignment
5799 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5801 #undef elf_backend_want_plt_sym
5802 #define elf_backend_want_plt_sym 1
5805 #define elf32_bed elf32_i386_vxworks_bed
5807 #include "elf32-target.h"