1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
29 #include "elf-vxworks.h"
30 #include "bfd_stdint.h"
35 /* 386 uses REL relocations instead of RELA. */
40 static reloc_howto_type elf_howto_table[]=
42 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
43 bfd_elf_generic_reloc, "R_386_NONE",
44 TRUE, 0x00000000, 0x00000000, FALSE),
45 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
46 bfd_elf_generic_reloc, "R_386_32",
47 TRUE, 0xffffffff, 0xffffffff, FALSE),
48 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
49 bfd_elf_generic_reloc, "R_386_PC32",
50 TRUE, 0xffffffff, 0xffffffff, TRUE),
51 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
52 bfd_elf_generic_reloc, "R_386_GOT32",
53 TRUE, 0xffffffff, 0xffffffff, FALSE),
54 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
55 bfd_elf_generic_reloc, "R_386_PLT32",
56 TRUE, 0xffffffff, 0xffffffff, TRUE),
57 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
58 bfd_elf_generic_reloc, "R_386_COPY",
59 TRUE, 0xffffffff, 0xffffffff, FALSE),
60 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
62 TRUE, 0xffffffff, 0xffffffff, FALSE),
63 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
65 TRUE, 0xffffffff, 0xffffffff, FALSE),
66 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_386_RELATIVE",
68 TRUE, 0xffffffff, 0xffffffff, FALSE),
69 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_386_GOTOFF",
71 TRUE, 0xffffffff, 0xffffffff, FALSE),
72 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_386_GOTPC",
74 TRUE, 0xffffffff, 0xffffffff, TRUE),
76 /* We have a gap in the reloc numbers here.
77 R_386_standard counts the number up to this point, and
78 R_386_ext_offset is the value to subtract from a reloc type of
79 R_386_16 thru R_386_PC8 to form an index into this table. */
80 #define R_386_standard (R_386_GOTPC + 1)
81 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
83 /* These relocs are a GNU extension. */
84 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
86 TRUE, 0xffffffff, 0xffffffff, FALSE),
87 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_386_TLS_IE",
89 TRUE, 0xffffffff, 0xffffffff, FALSE),
90 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
92 TRUE, 0xffffffff, 0xffffffff, FALSE),
93 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_386_TLS_LE",
95 TRUE, 0xffffffff, 0xffffffff, FALSE),
96 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
97 bfd_elf_generic_reloc, "R_386_TLS_GD",
98 TRUE, 0xffffffff, 0xffffffff, FALSE),
99 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_386_TLS_LDM",
101 TRUE, 0xffffffff, 0xffffffff, FALSE),
102 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_386_16",
104 TRUE, 0xffff, 0xffff, FALSE),
105 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_386_PC16",
107 TRUE, 0xffff, 0xffff, TRUE),
108 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_386_8",
110 TRUE, 0xff, 0xff, FALSE),
111 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
112 bfd_elf_generic_reloc, "R_386_PC8",
113 TRUE, 0xff, 0xff, TRUE),
115 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
116 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
117 /* These are common with Solaris TLS implementation. */
118 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
120 TRUE, 0xffffffff, 0xffffffff, FALSE),
121 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
123 TRUE, 0xffffffff, 0xffffffff, FALSE),
124 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
126 TRUE, 0xffffffff, 0xffffffff, FALSE),
127 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
129 TRUE, 0xffffffff, 0xffffffff, FALSE),
130 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
132 TRUE, 0xffffffff, 0xffffffff, FALSE),
133 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
135 TRUE, 0xffffffff, 0xffffffff, FALSE),
137 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
139 TRUE, 0xffffffff, 0xffffffff, FALSE),
140 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
143 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_TLS_DESC",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
146 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_386_IRELATIVE",
148 TRUE, 0xffffffff, 0xffffffff, FALSE),
151 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
152 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
154 /* GNU extension to record C++ vtable hierarchy. */
155 HOWTO (R_386_GNU_VTINHERIT, /* type */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
159 FALSE, /* pc_relative */
161 complain_overflow_dont, /* complain_on_overflow */
162 NULL, /* special_function */
163 "R_386_GNU_VTINHERIT", /* name */
164 FALSE, /* partial_inplace */
167 FALSE), /* pcrel_offset */
169 /* GNU extension to record C++ vtable member usage. */
170 HOWTO (R_386_GNU_VTENTRY, /* type */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
174 FALSE, /* pc_relative */
176 complain_overflow_dont, /* complain_on_overflow */
177 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
178 "R_386_GNU_VTENTRY", /* name */
179 FALSE, /* partial_inplace */
182 FALSE) /* pcrel_offset */
184 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
188 #ifdef DEBUG_GEN_RELOC
190 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
195 static reloc_howto_type *
196 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
197 bfd_reloc_code_real_type code)
202 TRACE ("BFD_RELOC_NONE");
203 return &elf_howto_table[R_386_NONE];
206 TRACE ("BFD_RELOC_32");
207 return &elf_howto_table[R_386_32];
210 TRACE ("BFD_RELOC_CTOR");
211 return &elf_howto_table[R_386_32];
213 case BFD_RELOC_32_PCREL:
214 TRACE ("BFD_RELOC_PC32");
215 return &elf_howto_table[R_386_PC32];
217 case BFD_RELOC_386_GOT32:
218 TRACE ("BFD_RELOC_386_GOT32");
219 return &elf_howto_table[R_386_GOT32];
221 case BFD_RELOC_386_PLT32:
222 TRACE ("BFD_RELOC_386_PLT32");
223 return &elf_howto_table[R_386_PLT32];
225 case BFD_RELOC_386_COPY:
226 TRACE ("BFD_RELOC_386_COPY");
227 return &elf_howto_table[R_386_COPY];
229 case BFD_RELOC_386_GLOB_DAT:
230 TRACE ("BFD_RELOC_386_GLOB_DAT");
231 return &elf_howto_table[R_386_GLOB_DAT];
233 case BFD_RELOC_386_JUMP_SLOT:
234 TRACE ("BFD_RELOC_386_JUMP_SLOT");
235 return &elf_howto_table[R_386_JUMP_SLOT];
237 case BFD_RELOC_386_RELATIVE:
238 TRACE ("BFD_RELOC_386_RELATIVE");
239 return &elf_howto_table[R_386_RELATIVE];
241 case BFD_RELOC_386_GOTOFF:
242 TRACE ("BFD_RELOC_386_GOTOFF");
243 return &elf_howto_table[R_386_GOTOFF];
245 case BFD_RELOC_386_GOTPC:
246 TRACE ("BFD_RELOC_386_GOTPC");
247 return &elf_howto_table[R_386_GOTPC];
249 /* These relocs are a GNU extension. */
250 case BFD_RELOC_386_TLS_TPOFF:
251 TRACE ("BFD_RELOC_386_TLS_TPOFF");
252 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
254 case BFD_RELOC_386_TLS_IE:
255 TRACE ("BFD_RELOC_386_TLS_IE");
256 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
258 case BFD_RELOC_386_TLS_GOTIE:
259 TRACE ("BFD_RELOC_386_TLS_GOTIE");
260 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
262 case BFD_RELOC_386_TLS_LE:
263 TRACE ("BFD_RELOC_386_TLS_LE");
264 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
266 case BFD_RELOC_386_TLS_GD:
267 TRACE ("BFD_RELOC_386_TLS_GD");
268 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
270 case BFD_RELOC_386_TLS_LDM:
271 TRACE ("BFD_RELOC_386_TLS_LDM");
272 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
275 TRACE ("BFD_RELOC_16");
276 return &elf_howto_table[R_386_16 - R_386_ext_offset];
278 case BFD_RELOC_16_PCREL:
279 TRACE ("BFD_RELOC_16_PCREL");
280 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
283 TRACE ("BFD_RELOC_8");
284 return &elf_howto_table[R_386_8 - R_386_ext_offset];
286 case BFD_RELOC_8_PCREL:
287 TRACE ("BFD_RELOC_8_PCREL");
288 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
290 /* Common with Sun TLS implementation. */
291 case BFD_RELOC_386_TLS_LDO_32:
292 TRACE ("BFD_RELOC_386_TLS_LDO_32");
293 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
295 case BFD_RELOC_386_TLS_IE_32:
296 TRACE ("BFD_RELOC_386_TLS_IE_32");
297 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
299 case BFD_RELOC_386_TLS_LE_32:
300 TRACE ("BFD_RELOC_386_TLS_LE_32");
301 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
303 case BFD_RELOC_386_TLS_DTPMOD32:
304 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
305 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
307 case BFD_RELOC_386_TLS_DTPOFF32:
308 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
309 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
311 case BFD_RELOC_386_TLS_TPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
313 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
315 case BFD_RELOC_386_TLS_GOTDESC:
316 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
317 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
319 case BFD_RELOC_386_TLS_DESC_CALL:
320 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
321 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
323 case BFD_RELOC_386_TLS_DESC:
324 TRACE ("BFD_RELOC_386_TLS_DESC");
325 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
327 case BFD_RELOC_386_IRELATIVE:
328 TRACE ("BFD_RELOC_386_IRELATIVE");
329 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
331 case BFD_RELOC_VTABLE_INHERIT:
332 TRACE ("BFD_RELOC_VTABLE_INHERIT");
333 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
335 case BFD_RELOC_VTABLE_ENTRY:
336 TRACE ("BFD_RELOC_VTABLE_ENTRY");
337 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
347 static reloc_howto_type *
348 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
353 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
354 if (elf_howto_table[i].name != NULL
355 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
356 return &elf_howto_table[i];
361 static reloc_howto_type *
362 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
366 if ((indx = r_type) >= R_386_standard
367 && ((indx = r_type - R_386_ext_offset) - R_386_standard
368 >= R_386_ext - R_386_standard)
369 && ((indx = r_type - R_386_tls_offset) - R_386_ext
370 >= R_386_irelative - R_386_ext)
371 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
372 >= R_386_vt - R_386_irelative))
374 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
378 BFD_ASSERT (elf_howto_table [indx].type == r_type);
379 return &elf_howto_table[indx];
383 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
385 Elf_Internal_Rela *dst)
387 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
388 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
391 /* Return whether a symbol name implies a local label. The UnixWare
392 2.1 cc generates temporary symbols that start with .X, so we
393 recognize them here. FIXME: do other SVR4 compilers also use .X?.
394 If so, we should move the .X recognition into
395 _bfd_elf_is_local_label_name. */
398 elf_i386_is_local_label_name (bfd *abfd, const char *name)
400 if (name[0] == '.' && name[1] == 'X')
403 return _bfd_elf_is_local_label_name (abfd, name);
406 /* Support for core dump NOTE sections. */
409 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
414 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
416 int pr_version = bfd_get_32 (abfd, note->descdata);
422 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
425 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
429 size = bfd_get_32 (abfd, note->descdata + 8);
433 switch (note->descsz)
438 case 144: /* Linux/i386 */
440 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
443 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
453 /* Make a ".reg/999" section. */
454 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
455 size, note->descpos + offset);
459 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
461 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
463 int pr_version = bfd_get_32 (abfd, note->descdata);
468 elf_tdata (abfd)->core_program
469 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
470 elf_tdata (abfd)->core_command
471 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
475 switch (note->descsz)
480 case 124: /* Linux/i386 elf_prpsinfo. */
481 elf_tdata (abfd)->core_pid
482 = bfd_get_32 (abfd, note->descdata + 12);
483 elf_tdata (abfd)->core_program
484 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
485 elf_tdata (abfd)->core_command
486 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
490 /* Note that for some reason, a spurious space is tacked
491 onto the end of the args in some (at least one anyway)
492 implementations, so strip it off if it exists. */
494 char *command = elf_tdata (abfd)->core_command;
495 int n = strlen (command);
497 if (0 < n && command[n - 1] == ' ')
498 command[n - 1] = '\0';
504 /* Functions for the i386 ELF linker.
506 In order to gain some understanding of code in this file without
507 knowing all the intricate details of the linker, note the
510 Functions named elf_i386_* are called by external routines, other
511 functions are only called locally. elf_i386_* functions appear
512 in this file more or less in the order in which they are called
513 from external routines. eg. elf_i386_check_relocs is called
514 early in the link process, elf_i386_finish_dynamic_sections is
515 one of the last functions. */
518 /* The name of the dynamic interpreter. This is put in the .interp
521 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
523 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
524 copying dynamic variables from a shared lib into an app's dynbss
525 section, and instead use a dynamic relocation to point into the
527 #define ELIMINATE_COPY_RELOCS 1
529 /* The size in bytes of an entry in the procedure linkage table. */
531 #define PLT_ENTRY_SIZE 16
533 /* The first entry in an absolute procedure linkage table looks like
534 this. See the SVR4 ABI i386 supplement to see how this works.
535 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
537 static const bfd_byte elf_i386_plt0_entry[12] =
539 0xff, 0x35, /* pushl contents of address */
540 0, 0, 0, 0, /* replaced with address of .got + 4. */
541 0xff, 0x25, /* jmp indirect */
542 0, 0, 0, 0 /* replaced with address of .got + 8. */
545 /* Subsequent entries in an absolute procedure linkage table look like
548 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
550 0xff, 0x25, /* jmp indirect */
551 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
552 0x68, /* pushl immediate */
553 0, 0, 0, 0, /* replaced with offset into relocation table. */
554 0xe9, /* jmp relative */
555 0, 0, 0, 0 /* replaced with offset to start of .plt. */
558 /* The first entry in a PIC procedure linkage table look like this.
559 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
561 static const bfd_byte elf_i386_pic_plt0_entry[12] =
563 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
564 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
567 /* Subsequent entries in a PIC procedure linkage table look like this. */
569 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
571 0xff, 0xa3, /* jmp *offset(%ebx) */
572 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
573 0x68, /* pushl immediate */
574 0, 0, 0, 0, /* replaced with offset into relocation table. */
575 0xe9, /* jmp relative */
576 0, 0, 0, 0 /* replaced with offset to start of .plt. */
579 /* .eh_frame covering the .plt section. */
581 static const bfd_byte elf_i386_eh_frame_plt[] =
583 #define PLT_CIE_LENGTH 20
584 #define PLT_FDE_LENGTH 36
585 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
586 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
587 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
588 0, 0, 0, 0, /* CIE ID */
590 'z', 'R', 0, /* Augmentation string */
591 1, /* Code alignment factor */
592 0x7c, /* Data alignment factor */
593 8, /* Return address column */
594 1, /* Augmentation size */
595 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
596 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
597 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
598 DW_CFA_nop, DW_CFA_nop,
600 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
601 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
602 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
603 0, 0, 0, 0, /* .plt size goes here */
604 0, /* Augmentation size */
605 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
606 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
607 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
608 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
609 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
610 11, /* Block length */
611 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
612 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
613 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
614 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
615 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
618 struct elf_i386_plt_layout
620 /* The first entry in an absolute procedure linkage table looks like this. */
621 const bfd_byte *plt0_entry;
622 unsigned int plt0_entry_size;
624 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
625 unsigned int plt0_got1_offset;
626 unsigned int plt0_got2_offset;
628 /* Later entries in an absolute procedure linkage table look like this. */
629 const bfd_byte *plt_entry;
630 unsigned int plt_entry_size;
632 /* Offsets into plt_entry that are to be replaced with... */
633 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
634 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
635 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
637 /* Offset into plt_entry where the initial value of the GOT entry points. */
638 unsigned int plt_lazy_offset;
640 /* The first entry in a PIC procedure linkage table looks like this. */
641 const bfd_byte *pic_plt0_entry;
643 /* Subsequent entries in a PIC procedure linkage table look like this. */
644 const bfd_byte *pic_plt_entry;
646 /* .eh_frame covering the .plt section. */
647 const bfd_byte *eh_frame_plt;
648 unsigned int eh_frame_plt_size;
651 #define GET_PLT_ENTRY_SIZE(abfd) \
652 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
654 /* These are the standard parameters. */
655 static const struct elf_i386_plt_layout elf_i386_plt =
657 elf_i386_plt0_entry, /* plt0_entry */
658 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
659 2, /* plt0_got1_offset */
660 8, /* plt0_got2_offset */
661 elf_i386_plt_entry, /* plt_entry */
662 PLT_ENTRY_SIZE, /* plt_entry_size */
663 2, /* plt_got_offset */
664 7, /* plt_reloc_offset */
665 12, /* plt_plt_offset */
666 6, /* plt_lazy_offset */
667 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
668 elf_i386_pic_plt_entry, /* pic_plt_entry */
669 elf_i386_eh_frame_plt, /* eh_frame_plt */
670 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
674 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
675 for the PLTResolve stub and then for each PLT entry. */
676 #define PLTRESOLVE_RELOCS_SHLIB 0
677 #define PLTRESOLVE_RELOCS 2
678 #define PLT_NON_JUMP_SLOT_RELOCS 2
680 /* Architecture-specific backend data for i386. */
682 struct elf_i386_backend_data
684 /* Parameters describing PLT generation. */
685 const struct elf_i386_plt_layout *plt;
687 /* Value used to fill the unused bytes of the first PLT entry. */
688 bfd_byte plt0_pad_byte;
690 /* True if the target system is VxWorks. */
694 #define get_elf_i386_backend_data(abfd) \
695 ((const struct elf_i386_backend_data *) \
696 get_elf_backend_data (abfd)->arch_data)
698 /* These are the standard parameters. */
699 static const struct elf_i386_backend_data elf_i386_arch_bed =
701 &elf_i386_plt, /* plt */
702 0, /* plt0_pad_byte */
706 #define elf_backend_arch_data &elf_i386_arch_bed
708 /* i386 ELF linker hash entry. */
710 struct elf_i386_link_hash_entry
712 struct elf_link_hash_entry elf;
714 /* Track dynamic relocs copied for this symbol. */
715 struct elf_dyn_relocs *dyn_relocs;
717 #define GOT_UNKNOWN 0
721 #define GOT_TLS_IE_POS 5
722 #define GOT_TLS_IE_NEG 6
723 #define GOT_TLS_IE_BOTH 7
724 #define GOT_TLS_GDESC 8
725 #define GOT_TLS_GD_BOTH_P(type) \
726 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
727 #define GOT_TLS_GD_P(type) \
728 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
729 #define GOT_TLS_GDESC_P(type) \
730 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
731 #define GOT_TLS_GD_ANY_P(type) \
732 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
733 unsigned char tls_type;
735 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
736 starting at the end of the jump table. */
740 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
742 struct elf_i386_obj_tdata
744 struct elf_obj_tdata root;
746 /* tls_type for each local got entry. */
747 char *local_got_tls_type;
749 /* GOTPLT entries for TLS descriptors. */
750 bfd_vma *local_tlsdesc_gotent;
753 #define elf_i386_tdata(abfd) \
754 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
756 #define elf_i386_local_got_tls_type(abfd) \
757 (elf_i386_tdata (abfd)->local_got_tls_type)
759 #define elf_i386_local_tlsdesc_gotent(abfd) \
760 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
762 #define is_i386_elf(bfd) \
763 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
764 && elf_tdata (bfd) != NULL \
765 && elf_object_id (bfd) == I386_ELF_DATA)
768 elf_i386_mkobject (bfd *abfd)
770 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
774 /* i386 ELF linker hash table. */
776 struct elf_i386_link_hash_table
778 struct elf_link_hash_table elf;
780 /* Short-cuts to get to dynamic linker sections. */
783 asection *plt_eh_frame;
787 bfd_signed_vma refcount;
791 /* The amount of space used by the reserved portion of the sgotplt
792 section, plus whatever space is used by the jump slots. */
793 bfd_vma sgotplt_jump_table_size;
795 /* Small local sym cache. */
796 struct sym_cache sym_cache;
798 /* _TLS_MODULE_BASE_ symbol. */
799 struct bfd_link_hash_entry *tls_module_base;
801 /* Used by local STT_GNU_IFUNC symbols. */
802 htab_t loc_hash_table;
803 void * loc_hash_memory;
805 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
808 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
809 bfd_vma next_tls_desc_index;
811 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
812 bfd_vma next_jump_slot_index;
814 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
815 bfd_vma next_irelative_index;
818 /* Get the i386 ELF linker hash table from a link_info structure. */
820 #define elf_i386_hash_table(p) \
821 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
822 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
824 #define elf_i386_compute_jump_table_size(htab) \
825 ((htab)->next_tls_desc_index * 4)
827 /* Create an entry in an i386 ELF linker hash table. */
829 static struct bfd_hash_entry *
830 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
831 struct bfd_hash_table *table,
834 /* Allocate the structure if it has not already been allocated by a
838 entry = (struct bfd_hash_entry *)
839 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
844 /* Call the allocation method of the superclass. */
845 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
848 struct elf_i386_link_hash_entry *eh;
850 eh = (struct elf_i386_link_hash_entry *) entry;
851 eh->dyn_relocs = NULL;
852 eh->tls_type = GOT_UNKNOWN;
853 eh->tlsdesc_got = (bfd_vma) -1;
859 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
860 for local symbol so that we can handle local STT_GNU_IFUNC symbols
861 as global symbol. We reuse indx and dynstr_index for local symbol
862 hash since they aren't used by global symbols in this backend. */
865 elf_i386_local_htab_hash (const void *ptr)
867 struct elf_link_hash_entry *h
868 = (struct elf_link_hash_entry *) ptr;
869 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
872 /* Compare local hash entries. */
875 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
877 struct elf_link_hash_entry *h1
878 = (struct elf_link_hash_entry *) ptr1;
879 struct elf_link_hash_entry *h2
880 = (struct elf_link_hash_entry *) ptr2;
882 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
885 /* Find and/or create a hash entry for local symbol. */
887 static struct elf_link_hash_entry *
888 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
889 bfd *abfd, const Elf_Internal_Rela *rel,
892 struct elf_i386_link_hash_entry e, *ret;
893 asection *sec = abfd->sections;
894 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
895 ELF32_R_SYM (rel->r_info));
898 e.elf.indx = sec->id;
899 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
900 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
901 create ? INSERT : NO_INSERT);
908 ret = (struct elf_i386_link_hash_entry *) *slot;
912 ret = (struct elf_i386_link_hash_entry *)
913 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
914 sizeof (struct elf_i386_link_hash_entry));
917 memset (ret, 0, sizeof (*ret));
918 ret->elf.indx = sec->id;
919 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
920 ret->elf.dynindx = -1;
926 /* Create an i386 ELF linker hash table. */
928 static struct bfd_link_hash_table *
929 elf_i386_link_hash_table_create (bfd *abfd)
931 struct elf_i386_link_hash_table *ret;
932 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
934 ret = (struct elf_i386_link_hash_table *) bfd_malloc (amt);
938 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
939 elf_i386_link_hash_newfunc,
940 sizeof (struct elf_i386_link_hash_entry),
949 ret->plt_eh_frame = NULL;
950 ret->tls_ldm_got.refcount = 0;
951 ret->next_tls_desc_index = 0;
952 ret->sgotplt_jump_table_size = 0;
953 ret->sym_cache.abfd = NULL;
954 ret->srelplt2 = NULL;
955 ret->tls_module_base = NULL;
956 ret->next_jump_slot_index = 0;
957 ret->next_irelative_index = 0;
959 ret->loc_hash_table = htab_try_create (1024,
960 elf_i386_local_htab_hash,
961 elf_i386_local_htab_eq,
963 ret->loc_hash_memory = objalloc_create ();
964 if (!ret->loc_hash_table || !ret->loc_hash_memory)
970 return &ret->elf.root;
973 /* Destroy an i386 ELF linker hash table. */
976 elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash)
978 struct elf_i386_link_hash_table *htab
979 = (struct elf_i386_link_hash_table *) hash;
981 if (htab->loc_hash_table)
982 htab_delete (htab->loc_hash_table);
983 if (htab->loc_hash_memory)
984 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
985 _bfd_generic_link_hash_table_free (hash);
988 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
989 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
993 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
995 struct elf_i386_link_hash_table *htab;
997 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1000 htab = elf_i386_hash_table (info);
1004 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1006 htab->srelbss = bfd_get_linker_section (dynobj, ".rel.bss");
1009 || (!info->shared && !htab->srelbss))
1012 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1013 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1017 if (!info->no_ld_generated_unwind_info
1018 && htab->plt_eh_frame == NULL
1019 && htab->elf.splt != NULL)
1021 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1022 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1023 | SEC_LINKER_CREATED);
1025 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1026 if (htab->plt_eh_frame == NULL
1027 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1034 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1037 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1038 struct elf_link_hash_entry *dir,
1039 struct elf_link_hash_entry *ind)
1041 struct elf_i386_link_hash_entry *edir, *eind;
1043 edir = (struct elf_i386_link_hash_entry *) dir;
1044 eind = (struct elf_i386_link_hash_entry *) ind;
1046 if (eind->dyn_relocs != NULL)
1048 if (edir->dyn_relocs != NULL)
1050 struct elf_dyn_relocs **pp;
1051 struct elf_dyn_relocs *p;
1053 /* Add reloc counts against the indirect sym to the direct sym
1054 list. Merge any entries against the same section. */
1055 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1057 struct elf_dyn_relocs *q;
1059 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1060 if (q->sec == p->sec)
1062 q->pc_count += p->pc_count;
1063 q->count += p->count;
1070 *pp = edir->dyn_relocs;
1073 edir->dyn_relocs = eind->dyn_relocs;
1074 eind->dyn_relocs = NULL;
1077 if (ind->root.type == bfd_link_hash_indirect
1078 && dir->got.refcount <= 0)
1080 edir->tls_type = eind->tls_type;
1081 eind->tls_type = GOT_UNKNOWN;
1084 if (ELIMINATE_COPY_RELOCS
1085 && ind->root.type != bfd_link_hash_indirect
1086 && dir->dynamic_adjusted)
1088 /* If called to transfer flags for a weakdef during processing
1089 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1090 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1091 dir->ref_dynamic |= ind->ref_dynamic;
1092 dir->ref_regular |= ind->ref_regular;
1093 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1094 dir->needs_plt |= ind->needs_plt;
1095 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1098 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1101 /* Return TRUE if the TLS access code sequence support transition
1105 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1107 Elf_Internal_Shdr *symtab_hdr,
1108 struct elf_link_hash_entry **sym_hashes,
1109 unsigned int r_type,
1110 const Elf_Internal_Rela *rel,
1111 const Elf_Internal_Rela *relend)
1113 unsigned int val, type;
1114 unsigned long r_symndx;
1115 struct elf_link_hash_entry *h;
1118 /* Get the section contents. */
1119 if (contents == NULL)
1121 if (elf_section_data (sec)->this_hdr.contents != NULL)
1122 contents = elf_section_data (sec)->this_hdr.contents;
1125 /* FIXME: How to better handle error condition? */
1126 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1129 /* Cache the section contents for elf_link_input_bfd. */
1130 elf_section_data (sec)->this_hdr.contents = contents;
1134 offset = rel->r_offset;
1139 if (offset < 2 || (rel + 1) >= relend)
1142 type = bfd_get_8 (abfd, contents + offset - 2);
1143 if (r_type == R_386_TLS_GD)
1145 /* Check transition from GD access model. Only
1146 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1147 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1148 can transit to different access model. */
1149 if ((offset + 10) > sec->size ||
1150 (type != 0x8d && type != 0x04))
1153 val = bfd_get_8 (abfd, contents + offset - 1);
1156 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1160 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1163 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1168 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1169 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1172 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1178 /* Check transition from LD access model. Only
1179 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1180 can transit to different access model. */
1181 if (type != 0x8d || (offset + 9) > sec->size)
1184 val = bfd_get_8 (abfd, contents + offset - 1);
1185 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1189 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1192 r_symndx = ELF32_R_SYM (rel[1].r_info);
1193 if (r_symndx < symtab_hdr->sh_info)
1196 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1197 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1198 may be versioned. */
1200 && h->root.root.string != NULL
1201 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1202 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1203 && (strncmp (h->root.root.string, "___tls_get_addr",
1207 /* Check transition from IE access model:
1208 movl foo@indntpoff(%rip), %eax
1209 movl foo@indntpoff(%rip), %reg
1210 addl foo@indntpoff(%rip), %reg
1213 if (offset < 1 || (offset + 4) > sec->size)
1216 /* Check "movl foo@tpoff(%rip), %eax" first. */
1217 val = bfd_get_8 (abfd, contents + offset - 1);
1224 /* Check movl|addl foo@tpoff(%rip), %reg. */
1225 type = bfd_get_8 (abfd, contents + offset - 2);
1226 return ((type == 0x8b || type == 0x03)
1227 && (val & 0xc7) == 0x05);
1229 case R_386_TLS_GOTIE:
1230 case R_386_TLS_IE_32:
1231 /* Check transition from {IE_32,GOTIE} access model:
1232 subl foo@{tpoff,gontoff}(%reg1), %reg2
1233 movl foo@{tpoff,gontoff}(%reg1), %reg2
1234 addl foo@{tpoff,gontoff}(%reg1), %reg2
1237 if (offset < 2 || (offset + 4) > sec->size)
1240 val = bfd_get_8 (abfd, contents + offset - 1);
1241 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1244 type = bfd_get_8 (abfd, contents + offset - 2);
1245 return type == 0x8b || type == 0x2b || type == 0x03;
1247 case R_386_TLS_GOTDESC:
1248 /* Check transition from GDesc access model:
1249 leal x@tlsdesc(%ebx), %eax
1251 Make sure it's a leal adding ebx to a 32-bit offset
1252 into any register, although it's probably almost always
1255 if (offset < 2 || (offset + 4) > sec->size)
1258 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1261 val = bfd_get_8 (abfd, contents + offset - 1);
1262 return (val & 0xc7) == 0x83;
1264 case R_386_TLS_DESC_CALL:
1265 /* Check transition from GDesc access model:
1266 call *x@tlsdesc(%rax)
1268 if (offset + 2 <= sec->size)
1270 /* Make sure that it's a call *x@tlsdesc(%rax). */
1271 static const unsigned char call[] = { 0xff, 0x10 };
1272 return memcmp (contents + offset, call, 2) == 0;
1282 /* Return TRUE if the TLS access transition is OK or no transition
1283 will be performed. Update R_TYPE if there is a transition. */
1286 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1287 asection *sec, bfd_byte *contents,
1288 Elf_Internal_Shdr *symtab_hdr,
1289 struct elf_link_hash_entry **sym_hashes,
1290 unsigned int *r_type, int tls_type,
1291 const Elf_Internal_Rela *rel,
1292 const Elf_Internal_Rela *relend,
1293 struct elf_link_hash_entry *h,
1294 unsigned long r_symndx)
1296 unsigned int from_type = *r_type;
1297 unsigned int to_type = from_type;
1298 bfd_boolean check = TRUE;
1300 /* Skip TLS transition for functions. */
1302 && (h->type == STT_FUNC
1303 || h->type == STT_GNU_IFUNC))
1309 case R_386_TLS_GOTDESC:
1310 case R_386_TLS_DESC_CALL:
1311 case R_386_TLS_IE_32:
1313 case R_386_TLS_GOTIE:
1314 if (info->executable)
1317 to_type = R_386_TLS_LE_32;
1318 else if (from_type != R_386_TLS_IE
1319 && from_type != R_386_TLS_GOTIE)
1320 to_type = R_386_TLS_IE_32;
1323 /* When we are called from elf_i386_relocate_section, CONTENTS
1324 isn't NULL and there may be additional transitions based on
1326 if (contents != NULL)
1328 unsigned int new_to_type = to_type;
1330 if (info->executable
1333 && (tls_type & GOT_TLS_IE))
1334 new_to_type = R_386_TLS_LE_32;
1336 if (to_type == R_386_TLS_GD
1337 || to_type == R_386_TLS_GOTDESC
1338 || to_type == R_386_TLS_DESC_CALL)
1340 if (tls_type == GOT_TLS_IE_POS)
1341 new_to_type = R_386_TLS_GOTIE;
1342 else if (tls_type & GOT_TLS_IE)
1343 new_to_type = R_386_TLS_IE_32;
1346 /* We checked the transition before when we were called from
1347 elf_i386_check_relocs. We only want to check the new
1348 transition which hasn't been checked before. */
1349 check = new_to_type != to_type && from_type == to_type;
1350 to_type = new_to_type;
1356 if (info->executable)
1357 to_type = R_386_TLS_LE_32;
1364 /* Return TRUE if there is no transition. */
1365 if (from_type == to_type)
1368 /* Check if the transition can be performed. */
1370 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1371 symtab_hdr, sym_hashes,
1372 from_type, rel, relend))
1374 reloc_howto_type *from, *to;
1377 from = elf_i386_rtype_to_howto (abfd, from_type);
1378 to = elf_i386_rtype_to_howto (abfd, to_type);
1381 name = h->root.root.string;
1384 struct elf_i386_link_hash_table *htab;
1386 htab = elf_i386_hash_table (info);
1391 Elf_Internal_Sym *isym;
1393 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1395 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1399 (*_bfd_error_handler)
1400 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1401 "in section `%A' failed"),
1402 abfd, sec, from->name, to->name, name,
1403 (unsigned long) rel->r_offset);
1404 bfd_set_error (bfd_error_bad_value);
1412 /* Look through the relocs for a section during the first phase, and
1413 calculate needed space in the global offset table, procedure linkage
1414 table, and dynamic reloc sections. */
1417 elf_i386_check_relocs (bfd *abfd,
1418 struct bfd_link_info *info,
1420 const Elf_Internal_Rela *relocs)
1422 struct elf_i386_link_hash_table *htab;
1423 Elf_Internal_Shdr *symtab_hdr;
1424 struct elf_link_hash_entry **sym_hashes;
1425 const Elf_Internal_Rela *rel;
1426 const Elf_Internal_Rela *rel_end;
1429 if (info->relocatable)
1432 BFD_ASSERT (is_i386_elf (abfd));
1434 htab = elf_i386_hash_table (info);
1438 symtab_hdr = &elf_symtab_hdr (abfd);
1439 sym_hashes = elf_sym_hashes (abfd);
1443 rel_end = relocs + sec->reloc_count;
1444 for (rel = relocs; rel < rel_end; rel++)
1446 unsigned int r_type;
1447 unsigned long r_symndx;
1448 struct elf_link_hash_entry *h;
1449 Elf_Internal_Sym *isym;
1452 r_symndx = ELF32_R_SYM (rel->r_info);
1453 r_type = ELF32_R_TYPE (rel->r_info);
1455 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1457 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1463 if (r_symndx < symtab_hdr->sh_info)
1465 /* A local symbol. */
1466 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1471 /* Check relocation against local STT_GNU_IFUNC symbol. */
1472 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1474 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1478 /* Fake a STT_GNU_IFUNC symbol. */
1479 h->type = STT_GNU_IFUNC;
1482 h->forced_local = 1;
1483 h->root.type = bfd_link_hash_defined;
1491 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1492 while (h->root.type == bfd_link_hash_indirect
1493 || h->root.type == bfd_link_hash_warning)
1494 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1499 /* Create the ifunc sections for static executables. If we
1500 never see an indirect function symbol nor we are building
1501 a static executable, those sections will be empty and
1502 won't appear in output. */
1513 if (htab->elf.dynobj == NULL)
1514 htab->elf.dynobj = abfd;
1515 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1520 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1521 it here if it is defined in a non-shared object. */
1522 if (h->type == STT_GNU_IFUNC
1525 /* It is referenced by a non-shared object. */
1529 /* STT_GNU_IFUNC symbol must go through PLT. */
1530 h->plt.refcount += 1;
1532 /* STT_GNU_IFUNC needs dynamic sections. */
1533 if (htab->elf.dynobj == NULL)
1534 htab->elf.dynobj = abfd;
1539 if (h->root.root.string)
1540 name = h->root.root.string;
1542 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1544 (*_bfd_error_handler)
1545 (_("%B: relocation %s against STT_GNU_IFUNC "
1546 "symbol `%s' isn't handled by %s"), abfd,
1547 elf_howto_table[r_type].name,
1548 name, __FUNCTION__);
1549 bfd_set_error (bfd_error_bad_value);
1554 h->pointer_equality_needed = 1;
1557 /* We must copy these reloc types into the
1558 output file. Create a reloc section in
1559 dynobj and make room for this reloc. */
1560 sreloc = _bfd_elf_create_ifunc_dyn_reloc
1561 (abfd, info, sec, sreloc,
1562 &((struct elf_i386_link_hash_entry *) h)->dyn_relocs);
1577 h->got.refcount += 1;
1578 if (htab->elf.sgot == NULL
1579 && !_bfd_elf_create_got_section (htab->elf.dynobj,
1589 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1590 symtab_hdr, sym_hashes,
1591 &r_type, GOT_UNKNOWN,
1592 rel, rel_end, h, r_symndx))
1598 htab->tls_ldm_got.refcount += 1;
1602 /* This symbol requires a procedure linkage table entry. We
1603 actually build the entry in adjust_dynamic_symbol,
1604 because this might be a case of linking PIC code which is
1605 never referenced by a dynamic object, in which case we
1606 don't need to generate a procedure linkage table entry
1609 /* If this is a local symbol, we resolve it directly without
1610 creating a procedure linkage table entry. */
1615 h->plt.refcount += 1;
1618 case R_386_TLS_IE_32:
1620 case R_386_TLS_GOTIE:
1621 if (!info->executable)
1622 info->flags |= DF_STATIC_TLS;
1627 case R_386_TLS_GOTDESC:
1628 case R_386_TLS_DESC_CALL:
1629 /* This symbol requires a global offset table entry. */
1631 int tls_type, old_tls_type;
1636 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1637 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1638 case R_386_TLS_GOTDESC:
1639 case R_386_TLS_DESC_CALL:
1640 tls_type = GOT_TLS_GDESC; break;
1641 case R_386_TLS_IE_32:
1642 if (ELF32_R_TYPE (rel->r_info) == r_type)
1643 tls_type = GOT_TLS_IE_NEG;
1645 /* If this is a GD->IE transition, we may use either of
1646 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1647 tls_type = GOT_TLS_IE;
1650 case R_386_TLS_GOTIE:
1651 tls_type = GOT_TLS_IE_POS; break;
1656 h->got.refcount += 1;
1657 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1661 bfd_signed_vma *local_got_refcounts;
1663 /* This is a global offset table entry for a local symbol. */
1664 local_got_refcounts = elf_local_got_refcounts (abfd);
1665 if (local_got_refcounts == NULL)
1669 size = symtab_hdr->sh_info;
1670 size *= (sizeof (bfd_signed_vma)
1671 + sizeof (bfd_vma) + sizeof(char));
1672 local_got_refcounts = (bfd_signed_vma *)
1673 bfd_zalloc (abfd, size);
1674 if (local_got_refcounts == NULL)
1676 elf_local_got_refcounts (abfd) = local_got_refcounts;
1677 elf_i386_local_tlsdesc_gotent (abfd)
1678 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1679 elf_i386_local_got_tls_type (abfd)
1680 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1682 local_got_refcounts[r_symndx] += 1;
1683 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1686 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1687 tls_type |= old_tls_type;
1688 /* If a TLS symbol is accessed using IE at least once,
1689 there is no point to use dynamic model for it. */
1690 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1691 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1692 || (tls_type & GOT_TLS_IE) == 0))
1694 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1695 tls_type = old_tls_type;
1696 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1697 && GOT_TLS_GD_ANY_P (tls_type))
1698 tls_type |= old_tls_type;
1702 name = h->root.root.string;
1704 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1706 (*_bfd_error_handler)
1707 (_("%B: `%s' accessed both as normal and "
1708 "thread local symbol"),
1714 if (old_tls_type != tls_type)
1717 elf_i386_hash_entry (h)->tls_type = tls_type;
1719 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1727 if (htab->elf.sgot == NULL)
1729 if (htab->elf.dynobj == NULL)
1730 htab->elf.dynobj = abfd;
1731 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1734 if (r_type != R_386_TLS_IE)
1738 case R_386_TLS_LE_32:
1740 if (info->executable)
1742 info->flags |= DF_STATIC_TLS;
1747 if (h != NULL && info->executable)
1749 /* If this reloc is in a read-only section, we might
1750 need a copy reloc. We can't check reliably at this
1751 stage whether the section is read-only, as input
1752 sections have not yet been mapped to output sections.
1753 Tentatively set the flag for now, and correct in
1754 adjust_dynamic_symbol. */
1757 /* We may need a .plt entry if the function this reloc
1758 refers to is in a shared lib. */
1759 h->plt.refcount += 1;
1760 if (r_type != R_386_PC32)
1761 h->pointer_equality_needed = 1;
1764 /* If we are creating a shared library, and this is a reloc
1765 against a global symbol, or a non PC relative reloc
1766 against a local symbol, then we need to copy the reloc
1767 into the shared library. However, if we are linking with
1768 -Bsymbolic, we do not need to copy a reloc against a
1769 global symbol which is defined in an object we are
1770 including in the link (i.e., DEF_REGULAR is set). At
1771 this point we have not seen all the input files, so it is
1772 possible that DEF_REGULAR is not set now but will be set
1773 later (it is never cleared). In case of a weak definition,
1774 DEF_REGULAR may be cleared later by a strong definition in
1775 a shared library. We account for that possibility below by
1776 storing information in the relocs_copied field of the hash
1777 table entry. A similar situation occurs when creating
1778 shared libraries and symbol visibility changes render the
1781 If on the other hand, we are creating an executable, we
1782 may need to keep relocations for symbols satisfied by a
1783 dynamic library if we manage to avoid copy relocs for the
1786 && (sec->flags & SEC_ALLOC) != 0
1787 && (r_type != R_386_PC32
1789 && (! SYMBOLIC_BIND (info, h)
1790 || h->root.type == bfd_link_hash_defweak
1791 || !h->def_regular))))
1792 || (ELIMINATE_COPY_RELOCS
1794 && (sec->flags & SEC_ALLOC) != 0
1796 && (h->root.type == bfd_link_hash_defweak
1797 || !h->def_regular)))
1799 struct elf_dyn_relocs *p;
1800 struct elf_dyn_relocs **head;
1802 /* We must copy these reloc types into the output file.
1803 Create a reloc section in dynobj and make room for
1807 if (htab->elf.dynobj == NULL)
1808 htab->elf.dynobj = abfd;
1810 sreloc = _bfd_elf_make_dynamic_reloc_section
1811 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1817 /* If this is a global symbol, we count the number of
1818 relocations we need for this symbol. */
1821 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1825 /* Track dynamic relocs needed for local syms too.
1826 We really need local syms available to do this
1831 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1836 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1840 vpp = &elf_section_data (s)->local_dynrel;
1841 head = (struct elf_dyn_relocs **)vpp;
1845 if (p == NULL || p->sec != sec)
1847 bfd_size_type amt = sizeof *p;
1848 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1860 if (r_type == R_386_PC32)
1865 /* This relocation describes the C++ object vtable hierarchy.
1866 Reconstruct it for later use during GC. */
1867 case R_386_GNU_VTINHERIT:
1868 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1872 /* This relocation describes which C++ vtable entries are actually
1873 used. Record for later use during GC. */
1874 case R_386_GNU_VTENTRY:
1875 BFD_ASSERT (h != NULL);
1877 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1889 /* Return the section that should be marked against GC for a given
1893 elf_i386_gc_mark_hook (asection *sec,
1894 struct bfd_link_info *info,
1895 Elf_Internal_Rela *rel,
1896 struct elf_link_hash_entry *h,
1897 Elf_Internal_Sym *sym)
1900 switch (ELF32_R_TYPE (rel->r_info))
1902 case R_386_GNU_VTINHERIT:
1903 case R_386_GNU_VTENTRY:
1907 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1910 /* Update the got entry reference counts for the section being removed. */
1913 elf_i386_gc_sweep_hook (bfd *abfd,
1914 struct bfd_link_info *info,
1916 const Elf_Internal_Rela *relocs)
1918 struct elf_i386_link_hash_table *htab;
1919 Elf_Internal_Shdr *symtab_hdr;
1920 struct elf_link_hash_entry **sym_hashes;
1921 bfd_signed_vma *local_got_refcounts;
1922 const Elf_Internal_Rela *rel, *relend;
1924 if (info->relocatable)
1927 htab = elf_i386_hash_table (info);
1931 elf_section_data (sec)->local_dynrel = NULL;
1933 symtab_hdr = &elf_symtab_hdr (abfd);
1934 sym_hashes = elf_sym_hashes (abfd);
1935 local_got_refcounts = elf_local_got_refcounts (abfd);
1937 relend = relocs + sec->reloc_count;
1938 for (rel = relocs; rel < relend; rel++)
1940 unsigned long r_symndx;
1941 unsigned int r_type;
1942 struct elf_link_hash_entry *h = NULL;
1944 r_symndx = ELF32_R_SYM (rel->r_info);
1945 if (r_symndx >= symtab_hdr->sh_info)
1947 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1948 while (h->root.type == bfd_link_hash_indirect
1949 || h->root.type == bfd_link_hash_warning)
1950 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1954 /* A local symbol. */
1955 Elf_Internal_Sym *isym;
1957 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1960 /* Check relocation against local STT_GNU_IFUNC symbol. */
1962 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1964 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
1972 struct elf_i386_link_hash_entry *eh;
1973 struct elf_dyn_relocs **pp;
1974 struct elf_dyn_relocs *p;
1976 eh = (struct elf_i386_link_hash_entry *) h;
1977 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1980 /* Everything must go for SEC. */
1986 r_type = ELF32_R_TYPE (rel->r_info);
1987 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1988 symtab_hdr, sym_hashes,
1989 &r_type, GOT_UNKNOWN,
1990 rel, relend, h, r_symndx))
1996 if (htab->tls_ldm_got.refcount > 0)
1997 htab->tls_ldm_got.refcount -= 1;
2001 case R_386_TLS_GOTDESC:
2002 case R_386_TLS_DESC_CALL:
2003 case R_386_TLS_IE_32:
2005 case R_386_TLS_GOTIE:
2009 if (h->got.refcount > 0)
2010 h->got.refcount -= 1;
2011 if (h->type == STT_GNU_IFUNC)
2013 if (h->plt.refcount > 0)
2014 h->plt.refcount -= 1;
2017 else if (local_got_refcounts != NULL)
2019 if (local_got_refcounts[r_symndx] > 0)
2020 local_got_refcounts[r_symndx] -= 1;
2027 && (h == NULL || h->type != STT_GNU_IFUNC))
2034 if (h->plt.refcount > 0)
2035 h->plt.refcount -= 1;
2040 if (h != NULL && h->type == STT_GNU_IFUNC)
2042 if (h->got.refcount > 0)
2043 h->got.refcount -= 1;
2044 if (h->plt.refcount > 0)
2045 h->plt.refcount -= 1;
2057 /* Adjust a symbol defined by a dynamic object and referenced by a
2058 regular object. The current definition is in some section of the
2059 dynamic object, but we're not including those sections. We have to
2060 change the definition to something the rest of the link can
2064 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2065 struct elf_link_hash_entry *h)
2067 struct elf_i386_link_hash_table *htab;
2070 /* STT_GNU_IFUNC symbol must go through PLT. */
2071 if (h->type == STT_GNU_IFUNC)
2073 if (h->plt.refcount <= 0)
2075 h->plt.offset = (bfd_vma) -1;
2081 /* If this is a function, put it in the procedure linkage table. We
2082 will fill in the contents of the procedure linkage table later,
2083 when we know the address of the .got section. */
2084 if (h->type == STT_FUNC
2087 if (h->plt.refcount <= 0
2088 || SYMBOL_CALLS_LOCAL (info, h)
2089 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2090 && h->root.type == bfd_link_hash_undefweak))
2092 /* This case can occur if we saw a PLT32 reloc in an input
2093 file, but the symbol was never referred to by a dynamic
2094 object, or if all references were garbage collected. In
2095 such a case, we don't actually need to build a procedure
2096 linkage table, and we can just do a PC32 reloc instead. */
2097 h->plt.offset = (bfd_vma) -1;
2104 /* It's possible that we incorrectly decided a .plt reloc was
2105 needed for an R_386_PC32 reloc to a non-function sym in
2106 check_relocs. We can't decide accurately between function and
2107 non-function syms in check-relocs; Objects loaded later in
2108 the link may change h->type. So fix it now. */
2109 h->plt.offset = (bfd_vma) -1;
2111 /* If this is a weak symbol, and there is a real definition, the
2112 processor independent code will have arranged for us to see the
2113 real definition first, and we can just use the same value. */
2114 if (h->u.weakdef != NULL)
2116 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2117 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2118 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2119 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2120 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2121 h->non_got_ref = h->u.weakdef->non_got_ref;
2125 /* This is a reference to a symbol defined by a dynamic object which
2126 is not a function. */
2128 /* If we are creating a shared library, we must presume that the
2129 only references to the symbol are via the global offset table.
2130 For such cases we need not do anything here; the relocations will
2131 be handled correctly by relocate_section. */
2135 /* If there are no references to this symbol that do not use the
2136 GOT, we don't need to generate a copy reloc. */
2137 if (!h->non_got_ref)
2140 /* If -z nocopyreloc was given, we won't generate them either. */
2141 if (info->nocopyreloc)
2147 htab = elf_i386_hash_table (info);
2151 /* If there aren't any dynamic relocs in read-only sections, then
2152 we can keep the dynamic relocs and avoid the copy reloc. This
2153 doesn't work on VxWorks, where we can not have dynamic relocations
2154 (other than copy and jump slot relocations) in an executable. */
2155 if (ELIMINATE_COPY_RELOCS
2156 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2158 struct elf_i386_link_hash_entry * eh;
2159 struct elf_dyn_relocs *p;
2161 eh = (struct elf_i386_link_hash_entry *) h;
2162 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2164 s = p->sec->output_section;
2165 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2176 /* We must allocate the symbol in our .dynbss section, which will
2177 become part of the .bss section of the executable. There will be
2178 an entry for this symbol in the .dynsym section. The dynamic
2179 object will contain position independent code, so all references
2180 from the dynamic object to this symbol will go through the global
2181 offset table. The dynamic linker will use the .dynsym entry to
2182 determine the address it must put in the global offset table, so
2183 both the dynamic object and the regular object will refer to the
2184 same memory location for the variable. */
2186 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2187 copy the initial value out of the dynamic object and into the
2188 runtime process image. */
2189 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2191 htab->srelbss->size += sizeof (Elf32_External_Rel);
2197 return _bfd_elf_adjust_dynamic_copy (h, s);
2200 /* Allocate space in .plt, .got and associated reloc sections for
2204 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2206 struct bfd_link_info *info;
2207 struct elf_i386_link_hash_table *htab;
2208 struct elf_i386_link_hash_entry *eh;
2209 struct elf_dyn_relocs *p;
2210 unsigned plt_entry_size;
2212 if (h->root.type == bfd_link_hash_indirect)
2215 eh = (struct elf_i386_link_hash_entry *) h;
2217 info = (struct bfd_link_info *) inf;
2218 htab = elf_i386_hash_table (info);
2222 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2224 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2225 here if it is defined and referenced in a non-shared object. */
2226 if (h->type == STT_GNU_IFUNC
2228 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2230 else if (htab->elf.dynamic_sections_created
2231 && h->plt.refcount > 0)
2233 /* Make sure this symbol is output as a dynamic symbol.
2234 Undefined weak syms won't yet be marked as dynamic. */
2235 if (h->dynindx == -1
2236 && !h->forced_local)
2238 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2243 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2245 asection *s = htab->elf.splt;
2247 /* If this is the first .plt entry, make room for the special
2250 s->size += plt_entry_size;
2252 h->plt.offset = s->size;
2254 /* If this symbol is not defined in a regular file, and we are
2255 not generating a shared library, then set the symbol to this
2256 location in the .plt. This is required to make function
2257 pointers compare as equal between the normal executable and
2258 the shared library. */
2262 h->root.u.def.section = s;
2263 h->root.u.def.value = h->plt.offset;
2266 /* Make room for this entry. */
2267 s->size += plt_entry_size;
2269 /* We also need to make an entry in the .got.plt section, which
2270 will be placed in the .got section by the linker script. */
2271 htab->elf.sgotplt->size += 4;
2273 /* We also need to make an entry in the .rel.plt section. */
2274 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2275 htab->elf.srelplt->reloc_count++;
2277 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2280 /* VxWorks has a second set of relocations for each PLT entry
2281 in executables. They go in a separate relocation section,
2282 which is processed by the kernel loader. */
2284 /* There are two relocations for the initial PLT entry: an
2285 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2286 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2288 if (h->plt.offset == plt_entry_size)
2289 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2291 /* There are two extra relocations for each subsequent PLT entry:
2292 an R_386_32 relocation for the GOT entry, and an R_386_32
2293 relocation for the PLT entry. */
2295 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2300 h->plt.offset = (bfd_vma) -1;
2306 h->plt.offset = (bfd_vma) -1;
2310 eh->tlsdesc_got = (bfd_vma) -1;
2312 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2313 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2314 if (h->got.refcount > 0
2317 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2318 h->got.offset = (bfd_vma) -1;
2319 else if (h->got.refcount > 0)
2323 int tls_type = elf_i386_hash_entry(h)->tls_type;
2325 /* Make sure this symbol is output as a dynamic symbol.
2326 Undefined weak syms won't yet be marked as dynamic. */
2327 if (h->dynindx == -1
2328 && !h->forced_local)
2330 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2335 if (GOT_TLS_GDESC_P (tls_type))
2337 eh->tlsdesc_got = htab->elf.sgotplt->size
2338 - elf_i386_compute_jump_table_size (htab);
2339 htab->elf.sgotplt->size += 8;
2340 h->got.offset = (bfd_vma) -2;
2342 if (! GOT_TLS_GDESC_P (tls_type)
2343 || GOT_TLS_GD_P (tls_type))
2345 h->got.offset = s->size;
2347 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2348 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2351 dyn = htab->elf.dynamic_sections_created;
2352 /* R_386_TLS_IE_32 needs one dynamic relocation,
2353 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2354 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2355 need two), R_386_TLS_GD needs one if local symbol and two if
2357 if (tls_type == GOT_TLS_IE_BOTH)
2358 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2359 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2360 || (tls_type & GOT_TLS_IE))
2361 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2362 else if (GOT_TLS_GD_P (tls_type))
2363 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2364 else if (! GOT_TLS_GDESC_P (tls_type)
2365 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2366 || h->root.type != bfd_link_hash_undefweak)
2368 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2369 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2370 if (GOT_TLS_GDESC_P (tls_type))
2371 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2374 h->got.offset = (bfd_vma) -1;
2376 if (eh->dyn_relocs == NULL)
2379 /* In the shared -Bsymbolic case, discard space allocated for
2380 dynamic pc-relative relocs against symbols which turn out to be
2381 defined in regular objects. For the normal shared case, discard
2382 space for pc-relative relocs that have become local due to symbol
2383 visibility changes. */
2387 /* The only reloc that uses pc_count is R_386_PC32, which will
2388 appear on a call or on something like ".long foo - .". We
2389 want calls to protected symbols to resolve directly to the
2390 function rather than going via the plt. If people want
2391 function pointer comparisons to work as expected then they
2392 should avoid writing assembly like ".long foo - .". */
2393 if (SYMBOL_CALLS_LOCAL (info, h))
2395 struct elf_dyn_relocs **pp;
2397 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2399 p->count -= p->pc_count;
2408 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2410 struct elf_dyn_relocs **pp;
2411 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2413 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2420 /* Also discard relocs on undefined weak syms with non-default
2422 if (eh->dyn_relocs != NULL
2423 && h->root.type == bfd_link_hash_undefweak)
2425 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2426 eh->dyn_relocs = NULL;
2428 /* Make sure undefined weak symbols are output as a dynamic
2430 else if (h->dynindx == -1
2431 && !h->forced_local)
2433 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2438 else if (ELIMINATE_COPY_RELOCS)
2440 /* For the non-shared case, discard space for relocs against
2441 symbols which turn out to need copy relocs or are not
2447 || (htab->elf.dynamic_sections_created
2448 && (h->root.type == bfd_link_hash_undefweak
2449 || h->root.type == bfd_link_hash_undefined))))
2451 /* Make sure this symbol is output as a dynamic symbol.
2452 Undefined weak syms won't yet be marked as dynamic. */
2453 if (h->dynindx == -1
2454 && !h->forced_local)
2456 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2460 /* If that succeeded, we know we'll be keeping all the
2462 if (h->dynindx != -1)
2466 eh->dyn_relocs = NULL;
2471 /* Finally, allocate space. */
2472 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2476 sreloc = elf_section_data (p->sec)->sreloc;
2478 BFD_ASSERT (sreloc != NULL);
2479 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2485 /* Allocate space in .plt, .got and associated reloc sections for
2486 local dynamic relocs. */
2489 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2491 struct elf_link_hash_entry *h
2492 = (struct elf_link_hash_entry *) *slot;
2494 if (h->type != STT_GNU_IFUNC
2498 || h->root.type != bfd_link_hash_defined)
2501 return elf_i386_allocate_dynrelocs (h, inf);
2504 /* Find any dynamic relocs that apply to read-only sections. */
2507 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2509 struct elf_i386_link_hash_entry *eh;
2510 struct elf_dyn_relocs *p;
2512 /* Skip local IFUNC symbols. */
2513 if (h->forced_local && h->type == STT_GNU_IFUNC)
2516 eh = (struct elf_i386_link_hash_entry *) h;
2517 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2519 asection *s = p->sec->output_section;
2521 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2523 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2525 info->flags |= DF_TEXTREL;
2527 if (info->warn_shared_textrel && info->shared)
2528 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2529 p->sec->owner, h->root.root.string,
2532 /* Not an error, just cut short the traversal. */
2540 mov foo@GOT(%reg), %reg
2542 lea foo@GOTOFF(%reg), %reg
2543 with the local symbol, foo. */
2546 elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2547 struct bfd_link_info *link_info)
2549 Elf_Internal_Shdr *symtab_hdr;
2550 Elf_Internal_Rela *internal_relocs;
2551 Elf_Internal_Rela *irel, *irelend;
2553 struct elf_i386_link_hash_table *htab;
2554 bfd_boolean changed_contents;
2555 bfd_boolean changed_relocs;
2556 bfd_signed_vma *local_got_refcounts;
2558 /* Don't even try to convert non-ELF outputs. */
2559 if (!is_elf_hash_table (link_info->hash))
2562 /* Nothing to do if there are no codes or no relocations. */
2563 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2564 || sec->reloc_count == 0)
2567 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2569 /* Load the relocations for this section. */
2570 internal_relocs = (_bfd_elf_link_read_relocs
2571 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2572 link_info->keep_memory));
2573 if (internal_relocs == NULL)
2576 htab = elf_i386_hash_table (link_info);
2577 changed_contents = FALSE;
2578 changed_relocs = FALSE;
2579 local_got_refcounts = elf_local_got_refcounts (abfd);
2581 /* Get the section contents. */
2582 if (elf_section_data (sec)->this_hdr.contents != NULL)
2583 contents = elf_section_data (sec)->this_hdr.contents;
2586 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2590 irelend = internal_relocs + sec->reloc_count;
2591 for (irel = internal_relocs; irel < irelend; irel++)
2593 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2594 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2596 struct elf_link_hash_entry *h;
2598 if (r_type != R_386_GOT32)
2601 /* Get the symbol referred to by the reloc. */
2602 if (r_symndx < symtab_hdr->sh_info)
2604 Elf_Internal_Sym *isym;
2606 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2609 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2610 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2611 && bfd_get_8 (input_bfd,
2612 contents + irel->r_offset - 2) == 0x8b)
2614 bfd_put_8 (output_bfd, 0x8d,
2615 contents + irel->r_offset - 2);
2616 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2617 if (local_got_refcounts != NULL
2618 && local_got_refcounts[r_symndx] > 0)
2619 local_got_refcounts[r_symndx] -= 1;
2620 changed_contents = TRUE;
2621 changed_relocs = TRUE;
2626 indx = r_symndx - symtab_hdr->sh_info;
2627 h = elf_sym_hashes (abfd)[indx];
2628 BFD_ASSERT (h != NULL);
2630 while (h->root.type == bfd_link_hash_indirect
2631 || h->root.type == bfd_link_hash_warning)
2632 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2634 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2635 optimizing _DYNAMIC since ld.so may use its link-time address. */
2637 && h->type != STT_GNU_IFUNC
2638 && h != htab->elf.hdynamic
2639 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2640 && bfd_get_8 (input_bfd,
2641 contents + irel->r_offset - 2) == 0x8b)
2643 bfd_put_8 (output_bfd, 0x8d,
2644 contents + irel->r_offset - 2);
2645 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2646 if (h->got.refcount > 0)
2647 h->got.refcount -= 1;
2648 changed_contents = TRUE;
2649 changed_relocs = TRUE;
2653 if (contents != NULL
2654 && elf_section_data (sec)->this_hdr.contents != contents)
2656 if (!changed_contents && !link_info->keep_memory)
2660 /* Cache the section contents for elf_link_input_bfd. */
2661 elf_section_data (sec)->this_hdr.contents = contents;
2665 if (elf_section_data (sec)->relocs != internal_relocs)
2667 if (!changed_relocs)
2668 free (internal_relocs);
2670 elf_section_data (sec)->relocs = internal_relocs;
2676 if (contents != NULL
2677 && elf_section_data (sec)->this_hdr.contents != contents)
2679 if (internal_relocs != NULL
2680 && elf_section_data (sec)->relocs != internal_relocs)
2681 free (internal_relocs);
2685 /* Set the sizes of the dynamic sections. */
2688 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
2690 struct elf_i386_link_hash_table *htab;
2696 htab = elf_i386_hash_table (info);
2699 dynobj = htab->elf.dynobj;
2703 if (htab->elf.dynamic_sections_created)
2705 /* Set the contents of the .interp section to the interpreter. */
2706 if (info->executable)
2708 s = bfd_get_linker_section (dynobj, ".interp");
2711 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2712 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2716 /* Set up .got offsets for local syms, and space for local dynamic
2718 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2720 bfd_signed_vma *local_got;
2721 bfd_signed_vma *end_local_got;
2722 char *local_tls_type;
2723 bfd_vma *local_tlsdesc_gotent;
2724 bfd_size_type locsymcount;
2725 Elf_Internal_Shdr *symtab_hdr;
2728 if (! is_i386_elf (ibfd))
2731 for (s = ibfd->sections; s != NULL; s = s->next)
2733 struct elf_dyn_relocs *p;
2735 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2738 for (p = ((struct elf_dyn_relocs *)
2739 elf_section_data (s)->local_dynrel);
2743 if (!bfd_is_abs_section (p->sec)
2744 && bfd_is_abs_section (p->sec->output_section))
2746 /* Input section has been discarded, either because
2747 it is a copy of a linkonce section or due to
2748 linker script /DISCARD/, so we'll be discarding
2751 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
2752 && strcmp (p->sec->output_section->name,
2755 /* Relocations in vxworks .tls_vars sections are
2756 handled specially by the loader. */
2758 else if (p->count != 0)
2760 srel = elf_section_data (p->sec)->sreloc;
2761 srel->size += p->count * sizeof (Elf32_External_Rel);
2762 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2763 && (info->flags & DF_TEXTREL) == 0)
2765 info->flags |= DF_TEXTREL;
2766 if (info->warn_shared_textrel && info->shared)
2767 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2768 p->sec->owner, p->sec);
2774 local_got = elf_local_got_refcounts (ibfd);
2778 symtab_hdr = &elf_symtab_hdr (ibfd);
2779 locsymcount = symtab_hdr->sh_info;
2780 end_local_got = local_got + locsymcount;
2781 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2782 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2784 srel = htab->elf.srelgot;
2785 for (; local_got < end_local_got;
2786 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2788 *local_tlsdesc_gotent = (bfd_vma) -1;
2791 if (GOT_TLS_GDESC_P (*local_tls_type))
2793 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2794 - elf_i386_compute_jump_table_size (htab);
2795 htab->elf.sgotplt->size += 8;
2796 *local_got = (bfd_vma) -2;
2798 if (! GOT_TLS_GDESC_P (*local_tls_type)
2799 || GOT_TLS_GD_P (*local_tls_type))
2801 *local_got = s->size;
2803 if (GOT_TLS_GD_P (*local_tls_type)
2804 || *local_tls_type == GOT_TLS_IE_BOTH)
2808 || GOT_TLS_GD_ANY_P (*local_tls_type)
2809 || (*local_tls_type & GOT_TLS_IE))
2811 if (*local_tls_type == GOT_TLS_IE_BOTH)
2812 srel->size += 2 * sizeof (Elf32_External_Rel);
2813 else if (GOT_TLS_GD_P (*local_tls_type)
2814 || ! GOT_TLS_GDESC_P (*local_tls_type))
2815 srel->size += sizeof (Elf32_External_Rel);
2816 if (GOT_TLS_GDESC_P (*local_tls_type))
2817 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2821 *local_got = (bfd_vma) -1;
2825 if (htab->tls_ldm_got.refcount > 0)
2827 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2829 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2830 htab->elf.sgot->size += 8;
2831 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2834 htab->tls_ldm_got.offset = -1;
2836 /* Allocate global sym .plt and .got entries, and space for global
2837 sym dynamic relocs. */
2838 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2840 /* Allocate .plt and .got entries, and space for local symbols. */
2841 htab_traverse (htab->loc_hash_table,
2842 elf_i386_allocate_local_dynrelocs,
2845 /* For every jump slot reserved in the sgotplt, reloc_count is
2846 incremented. However, when we reserve space for TLS descriptors,
2847 it's not incremented, so in order to compute the space reserved
2848 for them, it suffices to multiply the reloc count by the jump
2851 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2852 so that R_386_IRELATIVE entries come last. */
2853 if (htab->elf.srelplt)
2855 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2856 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2857 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2859 else if (htab->elf.irelplt)
2860 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2863 if (htab->elf.sgotplt)
2865 struct elf_link_hash_entry *got;
2866 got = elf_link_hash_lookup (elf_hash_table (info),
2867 "_GLOBAL_OFFSET_TABLE_",
2868 FALSE, FALSE, FALSE);
2870 /* Don't allocate .got.plt section if there are no GOT nor PLT
2871 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2873 || !got->ref_regular_nonweak)
2874 && (htab->elf.sgotplt->size
2875 == get_elf_backend_data (output_bfd)->got_header_size)
2876 && (htab->elf.splt == NULL
2877 || htab->elf.splt->size == 0)
2878 && (htab->elf.sgot == NULL
2879 || htab->elf.sgot->size == 0)
2880 && (htab->elf.iplt == NULL
2881 || htab->elf.iplt->size == 0)
2882 && (htab->elf.igotplt == NULL
2883 || htab->elf.igotplt->size == 0))
2884 htab->elf.sgotplt->size = 0;
2888 if (htab->plt_eh_frame != NULL
2889 && htab->elf.splt != NULL
2890 && htab->elf.splt->size != 0
2891 && !bfd_is_abs_section (htab->elf.splt->output_section)
2892 && _bfd_elf_eh_frame_present (info))
2893 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
2895 /* We now have determined the sizes of the various dynamic sections.
2896 Allocate memory for them. */
2898 for (s = dynobj->sections; s != NULL; s = s->next)
2900 bfd_boolean strip_section = TRUE;
2902 if ((s->flags & SEC_LINKER_CREATED) == 0)
2905 if (s == htab->elf.splt
2906 || s == htab->elf.sgot)
2908 /* Strip this section if we don't need it; see the
2910 /* We'd like to strip these sections if they aren't needed, but if
2911 we've exported dynamic symbols from them we must leave them.
2912 It's too late to tell BFD to get rid of the symbols. */
2914 if (htab->elf.hplt != NULL)
2915 strip_section = FALSE;
2917 else if (s == htab->elf.sgotplt
2918 || s == htab->elf.iplt
2919 || s == htab->elf.igotplt
2920 || s == htab->plt_eh_frame
2921 || s == htab->sdynbss)
2923 /* Strip these too. */
2925 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2928 && s != htab->elf.srelplt
2929 && s != htab->srelplt2)
2932 /* We use the reloc_count field as a counter if we need
2933 to copy relocs into the output file. */
2938 /* It's not one of our sections, so don't allocate space. */
2944 /* If we don't need this section, strip it from the
2945 output file. This is mostly to handle .rel.bss and
2946 .rel.plt. We must create both sections in
2947 create_dynamic_sections, because they must be created
2948 before the linker maps input sections to output
2949 sections. The linker does that before
2950 adjust_dynamic_symbol is called, and it is that
2951 function which decides whether anything needs to go
2952 into these sections. */
2954 s->flags |= SEC_EXCLUDE;
2958 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2961 /* Allocate memory for the section contents. We use bfd_zalloc
2962 here in case unused entries are not reclaimed before the
2963 section's contents are written out. This should not happen,
2964 but this way if it does, we get a R_386_NONE reloc instead
2966 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2967 if (s->contents == NULL)
2971 if (htab->plt_eh_frame != NULL
2972 && htab->plt_eh_frame->contents != NULL)
2974 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
2975 sizeof (elf_i386_eh_frame_plt));
2976 bfd_put_32 (dynobj, htab->elf.splt->size,
2977 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2980 if (htab->elf.dynamic_sections_created)
2982 /* Add some entries to the .dynamic section. We fill in the
2983 values later, in elf_i386_finish_dynamic_sections, but we
2984 must add the entries now so that we get the correct size for
2985 the .dynamic section. The DT_DEBUG entry is filled in by the
2986 dynamic linker and used by the debugger. */
2987 #define add_dynamic_entry(TAG, VAL) \
2988 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2990 if (info->executable)
2992 if (!add_dynamic_entry (DT_DEBUG, 0))
2996 if (htab->elf.splt->size != 0)
2998 if (!add_dynamic_entry (DT_PLTGOT, 0)
2999 || !add_dynamic_entry (DT_PLTRELSZ, 0)
3000 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3001 || !add_dynamic_entry (DT_JMPREL, 0))
3007 if (!add_dynamic_entry (DT_REL, 0)
3008 || !add_dynamic_entry (DT_RELSZ, 0)
3009 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3012 /* If any dynamic relocs apply to a read-only section,
3013 then we need a DT_TEXTREL entry. */
3014 if ((info->flags & DF_TEXTREL) == 0)
3015 elf_link_hash_traverse (&htab->elf,
3016 elf_i386_readonly_dynrelocs, info);
3018 if ((info->flags & DF_TEXTREL) != 0)
3020 if (!add_dynamic_entry (DT_TEXTREL, 0))
3024 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3025 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3028 #undef add_dynamic_entry
3034 elf_i386_always_size_sections (bfd *output_bfd,
3035 struct bfd_link_info *info)
3037 asection *tls_sec = elf_hash_table (info)->tls_sec;
3041 struct elf_link_hash_entry *tlsbase;
3043 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3044 "_TLS_MODULE_BASE_",
3045 FALSE, FALSE, FALSE);
3047 if (tlsbase && tlsbase->type == STT_TLS)
3049 struct elf_i386_link_hash_table *htab;
3050 struct bfd_link_hash_entry *bh = NULL;
3051 const struct elf_backend_data *bed
3052 = get_elf_backend_data (output_bfd);
3054 htab = elf_i386_hash_table (info);
3058 if (!(_bfd_generic_link_add_one_symbol
3059 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3060 tls_sec, 0, NULL, FALSE,
3061 bed->collect, &bh)))
3064 htab->tls_module_base = bh;
3066 tlsbase = (struct elf_link_hash_entry *)bh;
3067 tlsbase->def_regular = 1;
3068 tlsbase->other = STV_HIDDEN;
3069 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3076 /* Set the correct type for an x86 ELF section. We do this by the
3077 section name, which is a hack, but ought to work. */
3080 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3081 Elf_Internal_Shdr *hdr,
3086 name = bfd_get_section_name (abfd, sec);
3088 /* This is an ugly, but unfortunately necessary hack that is
3089 needed when producing EFI binaries on x86. It tells
3090 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3091 containing ELF relocation info. We need this hack in order to
3092 be able to generate ELF binaries that can be translated into
3093 EFI applications (which are essentially COFF objects). Those
3094 files contain a COFF ".reloc" section inside an ELFNN object,
3095 which would normally cause BFD to segfault because it would
3096 attempt to interpret this section as containing relocation
3097 entries for section "oc". With this hack enabled, ".reloc"
3098 will be treated as a normal data section, which will avoid the
3099 segfault. However, you won't be able to create an ELFNN binary
3100 with a section named "oc" that needs relocations, but that's
3101 the kind of ugly side-effects you get when detecting section
3102 types based on their names... In practice, this limitation is
3103 unlikely to bite. */
3104 if (strcmp (name, ".reloc") == 0)
3105 hdr->sh_type = SHT_PROGBITS;
3110 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3111 executables. Rather than setting it to the beginning of the TLS
3112 section, we have to set it to the end. This function may be called
3113 multiple times, it is idempotent. */
3116 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3118 struct elf_i386_link_hash_table *htab;
3119 struct bfd_link_hash_entry *base;
3121 if (!info->executable)
3124 htab = elf_i386_hash_table (info);
3128 base = htab->tls_module_base;
3132 base->u.def.value = htab->elf.tls_size;
3135 /* Return the base VMA address which should be subtracted from real addresses
3136 when resolving @dtpoff relocation.
3137 This is PT_TLS segment p_vaddr. */
3140 elf_i386_dtpoff_base (struct bfd_link_info *info)
3142 /* If tls_sec is NULL, we should have signalled an error already. */
3143 if (elf_hash_table (info)->tls_sec == NULL)
3145 return elf_hash_table (info)->tls_sec->vma;
3148 /* Return the relocation value for @tpoff relocation
3149 if STT_TLS virtual address is ADDRESS. */
3152 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3154 struct elf_link_hash_table *htab = elf_hash_table (info);
3155 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3156 bfd_vma static_tls_size;
3158 /* If tls_sec is NULL, we should have signalled an error already. */
3159 if (htab->tls_sec == NULL)
3162 /* Consider special static TLS alignment requirements. */
3163 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3164 return static_tls_size + htab->tls_sec->vma - address;
3167 /* Relocate an i386 ELF section. */
3170 elf_i386_relocate_section (bfd *output_bfd,
3171 struct bfd_link_info *info,
3173 asection *input_section,
3175 Elf_Internal_Rela *relocs,
3176 Elf_Internal_Sym *local_syms,
3177 asection **local_sections)
3179 struct elf_i386_link_hash_table *htab;
3180 Elf_Internal_Shdr *symtab_hdr;
3181 struct elf_link_hash_entry **sym_hashes;
3182 bfd_vma *local_got_offsets;
3183 bfd_vma *local_tlsdesc_gotents;
3184 Elf_Internal_Rela *rel;
3185 Elf_Internal_Rela *relend;
3186 bfd_boolean is_vxworks_tls;
3187 unsigned plt_entry_size;
3189 BFD_ASSERT (is_i386_elf (input_bfd));
3191 htab = elf_i386_hash_table (info);
3194 symtab_hdr = &elf_symtab_hdr (input_bfd);
3195 sym_hashes = elf_sym_hashes (input_bfd);
3196 local_got_offsets = elf_local_got_offsets (input_bfd);
3197 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3198 /* We have to handle relocations in vxworks .tls_vars sections
3199 specially, because the dynamic loader is 'weird'. */
3200 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3202 && !strcmp (input_section->output_section->name,
3205 elf_i386_set_tls_module_base (info);
3207 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3210 relend = relocs + input_section->reloc_count;
3211 for (; rel < relend; rel++)
3213 unsigned int r_type;
3214 reloc_howto_type *howto;
3215 unsigned long r_symndx;
3216 struct elf_link_hash_entry *h;
3217 Elf_Internal_Sym *sym;
3219 bfd_vma off, offplt;
3221 bfd_boolean unresolved_reloc;
3222 bfd_reloc_status_type r;
3226 r_type = ELF32_R_TYPE (rel->r_info);
3227 if (r_type == R_386_GNU_VTINHERIT
3228 || r_type == R_386_GNU_VTENTRY)
3231 if ((indx = r_type) >= R_386_standard
3232 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3233 >= R_386_ext - R_386_standard)
3234 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3235 >= R_386_irelative - R_386_ext))
3237 (*_bfd_error_handler)
3238 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3239 input_bfd, input_section, r_type);
3240 bfd_set_error (bfd_error_bad_value);
3243 howto = elf_howto_table + indx;
3245 r_symndx = ELF32_R_SYM (rel->r_info);
3249 unresolved_reloc = FALSE;
3250 if (r_symndx < symtab_hdr->sh_info)
3252 sym = local_syms + r_symndx;
3253 sec = local_sections[r_symndx];
3254 relocation = (sec->output_section->vma
3255 + sec->output_offset
3258 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3259 && ((sec->flags & SEC_MERGE) != 0
3260 || (info->relocatable
3261 && sec->output_offset != 0)))
3264 bfd_byte *where = contents + rel->r_offset;
3266 switch (howto->size)
3269 addend = bfd_get_8 (input_bfd, where);
3270 if (howto->pc_relative)
3272 addend = (addend ^ 0x80) - 0x80;
3277 addend = bfd_get_16 (input_bfd, where);
3278 if (howto->pc_relative)
3280 addend = (addend ^ 0x8000) - 0x8000;
3285 addend = bfd_get_32 (input_bfd, where);
3286 if (howto->pc_relative)
3288 addend = (addend ^ 0x80000000) - 0x80000000;
3296 if (info->relocatable)
3297 addend += sec->output_offset;
3300 asection *msec = sec;
3301 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3303 addend -= relocation;
3304 addend += msec->output_section->vma + msec->output_offset;
3307 switch (howto->size)
3310 /* FIXME: overflow checks. */
3311 if (howto->pc_relative)
3313 bfd_put_8 (input_bfd, addend, where);
3316 if (howto->pc_relative)
3318 bfd_put_16 (input_bfd, addend, where);
3321 if (howto->pc_relative)
3323 bfd_put_32 (input_bfd, addend, where);
3327 else if (!info->relocatable
3328 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3330 /* Relocate against local STT_GNU_IFUNC symbol. */
3331 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3336 /* Set STT_GNU_IFUNC symbol value. */
3337 h->root.u.def.value = sym->st_value;
3338 h->root.u.def.section = sec;
3343 bfd_boolean warned ATTRIBUTE_UNUSED;
3345 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3346 r_symndx, symtab_hdr, sym_hashes,
3348 unresolved_reloc, warned);
3351 if (sec != NULL && discarded_section (sec))
3352 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3353 rel, 1, relend, howto, 0, contents);
3355 if (info->relocatable)
3358 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3359 it here if it is defined in a non-shared object. */
3361 && h->type == STT_GNU_IFUNC
3364 asection *plt, *gotplt, *base_got;
3368 if ((input_section->flags & SEC_ALLOC) == 0
3369 || h->plt.offset == (bfd_vma) -1)
3372 /* STT_GNU_IFUNC symbol must go through PLT. */
3373 if (htab->elf.splt != NULL)
3375 plt = htab->elf.splt;
3376 gotplt = htab->elf.sgotplt;
3380 plt = htab->elf.iplt;
3381 gotplt = htab->elf.igotplt;
3384 relocation = (plt->output_section->vma
3385 + plt->output_offset + h->plt.offset);
3390 if (h->root.root.string)
3391 name = h->root.root.string;
3393 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3395 (*_bfd_error_handler)
3396 (_("%B: relocation %s against STT_GNU_IFUNC "
3397 "symbol `%s' isn't handled by %s"), input_bfd,
3398 elf_howto_table[r_type].name,
3399 name, __FUNCTION__);
3400 bfd_set_error (bfd_error_bad_value);
3404 /* Generate dynamic relcoation only when there is a
3405 non-GOT reference in a shared object. */
3406 if (info->shared && h->non_got_ref)
3408 Elf_Internal_Rela outrel;
3413 /* Need a dynamic relocation to get the real function
3415 offset = _bfd_elf_section_offset (output_bfd,
3419 if (offset == (bfd_vma) -1
3420 || offset == (bfd_vma) -2)
3423 outrel.r_offset = (input_section->output_section->vma
3424 + input_section->output_offset
3427 if (h->dynindx == -1
3429 || info->executable)
3431 /* This symbol is resolved locally. */
3432 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3433 bfd_put_32 (output_bfd,
3434 (h->root.u.def.value
3435 + h->root.u.def.section->output_section->vma
3436 + h->root.u.def.section->output_offset),
3440 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3442 sreloc = htab->elf.irelifunc;
3443 loc = sreloc->contents;
3444 loc += (sreloc->reloc_count++
3445 * sizeof (Elf32_External_Rel));
3446 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3448 /* If this reloc is against an external symbol, we
3449 do not want to fiddle with the addend. Otherwise,
3450 we need to include the symbol value so that it
3451 becomes an addend for the dynamic reloc. For an
3452 internal symbol, we have updated addend. */
3461 base_got = htab->elf.sgot;
3462 off = h->got.offset;
3464 if (base_got == NULL)
3467 if (off == (bfd_vma) -1)
3469 /* We can't use h->got.offset here to save state, or
3470 even just remember the offset, as finish_dynamic_symbol
3471 would use that as offset into .got. */
3473 if (htab->elf.splt != NULL)
3475 plt_index = h->plt.offset / plt_entry_size - 1;
3476 off = (plt_index + 3) * 4;
3477 base_got = htab->elf.sgotplt;
3481 plt_index = h->plt.offset / plt_entry_size;
3482 off = plt_index * 4;
3483 base_got = htab->elf.igotplt;
3486 if (h->dynindx == -1
3490 /* This references the local defitionion. We must
3491 initialize this entry in the global offset table.
3492 Since the offset must always be a multiple of 8,
3493 we use the least significant bit to record
3494 whether we have initialized it already.
3496 When doing a dynamic link, we create a .rela.got
3497 relocation entry to initialize the value. This
3498 is done in the finish_dynamic_symbol routine. */
3503 bfd_put_32 (output_bfd, relocation,
3504 base_got->contents + off);
3511 /* Adjust for static executables. */
3512 if (htab->elf.splt == NULL)
3513 relocation += gotplt->output_offset;
3517 relocation = (base_got->output_section->vma
3518 + base_got->output_offset + off
3519 - gotplt->output_section->vma
3520 - gotplt->output_offset);
3521 /* Adjust for static executables. */
3522 if (htab->elf.splt == NULL)
3523 relocation += gotplt->output_offset;
3529 relocation -= (gotplt->output_section->vma
3530 + gotplt->output_offset);
3538 /* Relocation is to the entry for this symbol in the global
3540 if (htab->elf.sgot == NULL)
3547 off = h->got.offset;
3548 dyn = htab->elf.dynamic_sections_created;
3549 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3551 && SYMBOL_REFERENCES_LOCAL (info, h))
3552 || (ELF_ST_VISIBILITY (h->other)
3553 && h->root.type == bfd_link_hash_undefweak))
3555 /* This is actually a static link, or it is a
3556 -Bsymbolic link and the symbol is defined
3557 locally, or the symbol was forced to be local
3558 because of a version file. We must initialize
3559 this entry in the global offset table. Since the
3560 offset must always be a multiple of 4, we use the
3561 least significant bit to record whether we have
3562 initialized it already.
3564 When doing a dynamic link, we create a .rel.got
3565 relocation entry to initialize the value. This
3566 is done in the finish_dynamic_symbol routine. */
3571 bfd_put_32 (output_bfd, relocation,
3572 htab->elf.sgot->contents + off);
3577 unresolved_reloc = FALSE;
3581 if (local_got_offsets == NULL)
3584 off = local_got_offsets[r_symndx];
3586 /* The offset must always be a multiple of 4. We use
3587 the least significant bit to record whether we have
3588 already generated the necessary reloc. */
3593 bfd_put_32 (output_bfd, relocation,
3594 htab->elf.sgot->contents + off);
3599 Elf_Internal_Rela outrel;
3602 s = htab->elf.srelgot;
3606 outrel.r_offset = (htab->elf.sgot->output_section->vma
3607 + htab->elf.sgot->output_offset
3609 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3611 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
3612 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3615 local_got_offsets[r_symndx] |= 1;
3619 if (off >= (bfd_vma) -2)
3622 relocation = htab->elf.sgot->output_section->vma
3623 + htab->elf.sgot->output_offset + off
3624 - htab->elf.sgotplt->output_section->vma
3625 - htab->elf.sgotplt->output_offset;
3629 /* Relocation is relative to the start of the global offset
3632 /* Check to make sure it isn't a protected function symbol
3633 for shared library since it may not be local when used
3634 as function address. We also need to make sure that a
3635 symbol is defined locally. */
3636 if (info->shared && h)
3638 if (!h->def_regular)
3642 switch (ELF_ST_VISIBILITY (h->other))
3645 v = _("hidden symbol");
3648 v = _("internal symbol");
3651 v = _("protected symbol");
3658 (*_bfd_error_handler)
3659 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3660 input_bfd, v, h->root.root.string);
3661 bfd_set_error (bfd_error_bad_value);
3664 else if (!info->executable
3665 && !SYMBOLIC_BIND (info, h)
3666 && h->type == STT_FUNC
3667 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3669 (*_bfd_error_handler)
3670 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3671 input_bfd, h->root.root.string);
3672 bfd_set_error (bfd_error_bad_value);
3677 /* Note that sgot is not involved in this
3678 calculation. We always want the start of .got.plt. If we
3679 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3680 permitted by the ABI, we might have to change this
3682 relocation -= htab->elf.sgotplt->output_section->vma
3683 + htab->elf.sgotplt->output_offset;
3687 /* Use global offset table as symbol value. */
3688 relocation = htab->elf.sgotplt->output_section->vma
3689 + htab->elf.sgotplt->output_offset;
3690 unresolved_reloc = FALSE;
3694 /* Relocation is to the entry for this symbol in the
3695 procedure linkage table. */
3697 /* Resolve a PLT32 reloc against a local symbol directly,
3698 without using the procedure linkage table. */
3702 if (h->plt.offset == (bfd_vma) -1
3703 || htab->elf.splt == NULL)
3705 /* We didn't make a PLT entry for this symbol. This
3706 happens when statically linking PIC code, or when
3707 using -Bsymbolic. */
3711 relocation = (htab->elf.splt->output_section->vma
3712 + htab->elf.splt->output_offset
3714 unresolved_reloc = FALSE;
3719 if ((input_section->flags & SEC_ALLOC) == 0
3725 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3726 || h->root.type != bfd_link_hash_undefweak)
3727 && (r_type != R_386_PC32
3728 || !SYMBOL_CALLS_LOCAL (info, h)))
3729 || (ELIMINATE_COPY_RELOCS
3736 || h->root.type == bfd_link_hash_undefweak
3737 || h->root.type == bfd_link_hash_undefined)))
3739 Elf_Internal_Rela outrel;
3741 bfd_boolean skip, relocate;
3744 /* When generating a shared object, these relocations
3745 are copied into the output file to be resolved at run
3752 _bfd_elf_section_offset (output_bfd, info, input_section,
3754 if (outrel.r_offset == (bfd_vma) -1)
3756 else if (outrel.r_offset == (bfd_vma) -2)
3757 skip = TRUE, relocate = TRUE;
3758 outrel.r_offset += (input_section->output_section->vma
3759 + input_section->output_offset);
3762 memset (&outrel, 0, sizeof outrel);
3765 && (r_type == R_386_PC32
3767 || !SYMBOLIC_BIND (info, h)
3768 || !h->def_regular))
3769 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3772 /* This symbol is local, or marked to become local. */
3774 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3777 sreloc = elf_section_data (input_section)->sreloc;
3779 if (sreloc == NULL || sreloc->contents == NULL)
3781 r = bfd_reloc_notsupported;
3782 goto check_relocation_error;
3785 loc = sreloc->contents;
3786 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3788 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3790 /* If this reloc is against an external symbol, we do
3791 not want to fiddle with the addend. Otherwise, we
3792 need to include the symbol value so that it becomes
3793 an addend for the dynamic reloc. */
3800 if (!info->executable)
3802 Elf_Internal_Rela outrel;
3806 outrel.r_offset = rel->r_offset
3807 + input_section->output_section->vma
3808 + input_section->output_offset;
3809 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3810 sreloc = elf_section_data (input_section)->sreloc;
3813 loc = sreloc->contents;
3814 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3815 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3820 case R_386_TLS_GOTDESC:
3821 case R_386_TLS_DESC_CALL:
3822 case R_386_TLS_IE_32:
3823 case R_386_TLS_GOTIE:
3824 tls_type = GOT_UNKNOWN;
3825 if (h == NULL && local_got_offsets)
3826 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3828 tls_type = elf_i386_hash_entry(h)->tls_type;
3829 if (tls_type == GOT_TLS_IE)
3830 tls_type = GOT_TLS_IE_NEG;
3832 if (! elf_i386_tls_transition (info, input_bfd,
3833 input_section, contents,
3834 symtab_hdr, sym_hashes,
3835 &r_type, tls_type, rel,
3836 relend, h, r_symndx))
3839 if (r_type == R_386_TLS_LE_32)
3841 BFD_ASSERT (! unresolved_reloc);
3842 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3847 /* GD->LE transition. */
3848 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3851 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3853 movl %gs:0, %eax; subl $foo@tpoff, %eax
3854 (6 byte form of subl). */
3855 memcpy (contents + rel->r_offset - 3,
3856 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3857 roff = rel->r_offset + 5;
3861 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3863 movl %gs:0, %eax; subl $foo@tpoff, %eax
3864 (6 byte form of subl). */
3865 memcpy (contents + rel->r_offset - 2,
3866 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3867 roff = rel->r_offset + 6;
3869 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3871 /* Skip R_386_PC32/R_386_PLT32. */
3875 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3877 /* GDesc -> LE transition.
3878 It's originally something like:
3879 leal x@tlsdesc(%ebx), %eax
3883 Registers other than %eax may be set up here. */
3888 roff = rel->r_offset;
3889 val = bfd_get_8 (input_bfd, contents + roff - 1);
3891 /* Now modify the instruction as appropriate. */
3892 /* aoliva FIXME: remove the above and xor the byte
3894 bfd_put_8 (output_bfd, val ^ 0x86,
3895 contents + roff - 1);
3896 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3900 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3902 /* GDesc -> LE transition.
3910 roff = rel->r_offset;
3911 bfd_put_8 (output_bfd, 0x66, contents + roff);
3912 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3915 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3919 /* IE->LE transition:
3920 Originally it can be one of:
3928 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3931 /* movl foo, %eax. */
3932 bfd_put_8 (output_bfd, 0xb8,
3933 contents + rel->r_offset - 1);
3939 type = bfd_get_8 (input_bfd,
3940 contents + rel->r_offset - 2);
3945 bfd_put_8 (output_bfd, 0xc7,
3946 contents + rel->r_offset - 2);
3947 bfd_put_8 (output_bfd,
3948 0xc0 | ((val >> 3) & 7),
3949 contents + rel->r_offset - 1);
3953 bfd_put_8 (output_bfd, 0x81,
3954 contents + rel->r_offset - 2);
3955 bfd_put_8 (output_bfd,
3956 0xc0 | ((val >> 3) & 7),
3957 contents + rel->r_offset - 1);
3964 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3965 contents + rel->r_offset);
3970 unsigned int val, type;
3972 /* {IE_32,GOTIE}->LE transition:
3973 Originally it can be one of:
3974 subl foo(%reg1), %reg2
3975 movl foo(%reg1), %reg2
3976 addl foo(%reg1), %reg2
3979 movl $foo, %reg2 (6 byte form)
3980 addl $foo, %reg2. */
3981 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3982 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3986 bfd_put_8 (output_bfd, 0xc7,
3987 contents + rel->r_offset - 2);
3988 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3989 contents + rel->r_offset - 1);
3991 else if (type == 0x2b)
3994 bfd_put_8 (output_bfd, 0x81,
3995 contents + rel->r_offset - 2);
3996 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3997 contents + rel->r_offset - 1);
3999 else if (type == 0x03)
4002 bfd_put_8 (output_bfd, 0x81,
4003 contents + rel->r_offset - 2);
4004 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4005 contents + rel->r_offset - 1);
4009 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4010 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4011 contents + rel->r_offset);
4013 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4014 contents + rel->r_offset);
4019 if (htab->elf.sgot == NULL)
4024 off = h->got.offset;
4025 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4029 if (local_got_offsets == NULL)
4032 off = local_got_offsets[r_symndx];
4033 offplt = local_tlsdesc_gotents[r_symndx];
4040 Elf_Internal_Rela outrel;
4045 if (htab->elf.srelgot == NULL)
4048 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4050 if (GOT_TLS_GDESC_P (tls_type))
4052 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4053 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4054 <= htab->elf.sgotplt->size);
4055 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4056 + htab->elf.sgotplt->output_offset
4058 + htab->sgotplt_jump_table_size);
4059 sreloc = htab->elf.srelplt;
4060 loc = sreloc->contents;
4061 loc += (htab->next_tls_desc_index++
4062 * sizeof (Elf32_External_Rel));
4063 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4064 <= sreloc->contents + sreloc->size);
4065 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4068 BFD_ASSERT (! unresolved_reloc);
4069 bfd_put_32 (output_bfd,
4070 relocation - elf_i386_dtpoff_base (info),
4071 htab->elf.sgotplt->contents + offplt
4072 + htab->sgotplt_jump_table_size + 4);
4076 bfd_put_32 (output_bfd, 0,
4077 htab->elf.sgotplt->contents + offplt
4078 + htab->sgotplt_jump_table_size + 4);
4082 sreloc = htab->elf.srelgot;
4084 outrel.r_offset = (htab->elf.sgot->output_section->vma
4085 + htab->elf.sgot->output_offset + off);
4087 if (GOT_TLS_GD_P (tls_type))
4088 dr_type = R_386_TLS_DTPMOD32;
4089 else if (GOT_TLS_GDESC_P (tls_type))
4091 else if (tls_type == GOT_TLS_IE_POS)
4092 dr_type = R_386_TLS_TPOFF;
4094 dr_type = R_386_TLS_TPOFF32;
4096 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4097 bfd_put_32 (output_bfd,
4098 relocation - elf_i386_dtpoff_base (info),
4099 htab->elf.sgot->contents + off);
4100 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4101 bfd_put_32 (output_bfd,
4102 elf_i386_dtpoff_base (info) - relocation,
4103 htab->elf.sgot->contents + off);
4104 else if (dr_type != R_386_TLS_DESC)
4105 bfd_put_32 (output_bfd, 0,
4106 htab->elf.sgot->contents + off);
4107 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4109 loc = sreloc->contents;
4110 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
4111 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4112 <= sreloc->contents + sreloc->size);
4113 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4115 if (GOT_TLS_GD_P (tls_type))
4119 BFD_ASSERT (! unresolved_reloc);
4120 bfd_put_32 (output_bfd,
4121 relocation - elf_i386_dtpoff_base (info),
4122 htab->elf.sgot->contents + off + 4);
4126 bfd_put_32 (output_bfd, 0,
4127 htab->elf.sgot->contents + off + 4);
4128 outrel.r_info = ELF32_R_INFO (indx,
4129 R_386_TLS_DTPOFF32);
4130 outrel.r_offset += 4;
4131 sreloc->reloc_count++;
4132 loc += sizeof (Elf32_External_Rel);
4133 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4134 <= sreloc->contents + sreloc->size);
4135 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4138 else if (tls_type == GOT_TLS_IE_BOTH)
4140 bfd_put_32 (output_bfd,
4142 ? relocation - elf_i386_dtpoff_base (info)
4144 htab->elf.sgot->contents + off + 4);
4145 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4146 outrel.r_offset += 4;
4147 sreloc->reloc_count++;
4148 loc += sizeof (Elf32_External_Rel);
4149 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4156 local_got_offsets[r_symndx] |= 1;
4159 if (off >= (bfd_vma) -2
4160 && ! GOT_TLS_GDESC_P (tls_type))
4162 if (r_type == R_386_TLS_GOTDESC
4163 || r_type == R_386_TLS_DESC_CALL)
4165 relocation = htab->sgotplt_jump_table_size + offplt;
4166 unresolved_reloc = FALSE;
4168 else if (r_type == ELF32_R_TYPE (rel->r_info))
4170 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4171 + htab->elf.sgotplt->output_offset;
4172 relocation = htab->elf.sgot->output_section->vma
4173 + htab->elf.sgot->output_offset + off - g_o_t;
4174 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4175 && tls_type == GOT_TLS_IE_BOTH)
4177 if (r_type == R_386_TLS_IE)
4178 relocation += g_o_t;
4179 unresolved_reloc = FALSE;
4181 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4183 unsigned int val, type;
4186 /* GD->IE transition. */
4187 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4188 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4191 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4193 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4195 roff = rel->r_offset - 3;
4199 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4201 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4202 roff = rel->r_offset - 2;
4204 memcpy (contents + roff,
4205 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4206 contents[roff + 7] = 0x80 | (val & 7);
4207 /* If foo is used only with foo@gotntpoff(%reg) and
4208 foo@indntpoff, but not with foo@gottpoff(%reg), change
4209 subl $foo@gottpoff(%reg), %eax
4211 addl $foo@gotntpoff(%reg), %eax. */
4212 if (tls_type == GOT_TLS_IE_POS)
4213 contents[roff + 6] = 0x03;
4214 bfd_put_32 (output_bfd,
4215 htab->elf.sgot->output_section->vma
4216 + htab->elf.sgot->output_offset + off
4217 - htab->elf.sgotplt->output_section->vma
4218 - htab->elf.sgotplt->output_offset,
4219 contents + roff + 8);
4220 /* Skip R_386_PLT32. */
4224 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4226 /* GDesc -> IE transition.
4227 It's originally something like:
4228 leal x@tlsdesc(%ebx), %eax
4231 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4233 movl x@gottpoff(%ebx), %eax # before negl %eax
4235 Registers other than %eax may be set up here. */
4239 /* First, make sure it's a leal adding ebx to a 32-bit
4240 offset into any register, although it's probably
4241 almost always going to be eax. */
4242 roff = rel->r_offset;
4244 /* Now modify the instruction as appropriate. */
4245 /* To turn a leal into a movl in the form we use it, it
4246 suffices to change the first byte from 0x8d to 0x8b.
4247 aoliva FIXME: should we decide to keep the leal, all
4248 we have to do is remove the statement below, and
4249 adjust the relaxation of R_386_TLS_DESC_CALL. */
4250 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4252 if (tls_type == GOT_TLS_IE_BOTH)
4255 bfd_put_32 (output_bfd,
4256 htab->elf.sgot->output_section->vma
4257 + htab->elf.sgot->output_offset + off
4258 - htab->elf.sgotplt->output_section->vma
4259 - htab->elf.sgotplt->output_offset,
4263 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4265 /* GDesc -> IE transition.
4273 depending on how we transformed the TLS_GOTDESC above.
4278 roff = rel->r_offset;
4280 /* Now modify the instruction as appropriate. */
4281 if (tls_type != GOT_TLS_IE_NEG)
4284 bfd_put_8 (output_bfd, 0x66, contents + roff);
4285 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4290 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4291 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4301 if (! elf_i386_tls_transition (info, input_bfd,
4302 input_section, contents,
4303 symtab_hdr, sym_hashes,
4304 &r_type, GOT_UNKNOWN, rel,
4305 relend, h, r_symndx))
4308 if (r_type != R_386_TLS_LDM)
4310 /* LD->LE transition:
4311 leal foo(%reg), %eax; call ___tls_get_addr.
4313 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4314 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4315 memcpy (contents + rel->r_offset - 2,
4316 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4317 /* Skip R_386_PC32/R_386_PLT32. */
4322 if (htab->elf.sgot == NULL)
4325 off = htab->tls_ldm_got.offset;
4330 Elf_Internal_Rela outrel;
4333 if (htab->elf.srelgot == NULL)
4336 outrel.r_offset = (htab->elf.sgot->output_section->vma
4337 + htab->elf.sgot->output_offset + off);
4339 bfd_put_32 (output_bfd, 0,
4340 htab->elf.sgot->contents + off);
4341 bfd_put_32 (output_bfd, 0,
4342 htab->elf.sgot->contents + off + 4);
4343 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4344 loc = htab->elf.srelgot->contents;
4345 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4346 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4347 htab->tls_ldm_got.offset |= 1;
4349 relocation = htab->elf.sgot->output_section->vma
4350 + htab->elf.sgot->output_offset + off
4351 - htab->elf.sgotplt->output_section->vma
4352 - htab->elf.sgotplt->output_offset;
4353 unresolved_reloc = FALSE;
4356 case R_386_TLS_LDO_32:
4357 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
4358 relocation -= elf_i386_dtpoff_base (info);
4360 /* When converting LDO to LE, we must negate. */
4361 relocation = -elf_i386_tpoff (info, relocation);
4364 case R_386_TLS_LE_32:
4366 if (!info->executable)
4368 Elf_Internal_Rela outrel;
4372 outrel.r_offset = rel->r_offset
4373 + input_section->output_section->vma
4374 + input_section->output_offset;
4375 if (h != NULL && h->dynindx != -1)
4379 if (r_type == R_386_TLS_LE_32)
4380 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4382 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4383 sreloc = elf_section_data (input_section)->sreloc;
4386 loc = sreloc->contents;
4387 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
4388 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4391 else if (r_type == R_386_TLS_LE_32)
4392 relocation = elf_i386_dtpoff_base (info) - relocation;
4394 relocation -= elf_i386_dtpoff_base (info);
4396 else if (r_type == R_386_TLS_LE_32)
4397 relocation = elf_i386_tpoff (info, relocation);
4399 relocation = -elf_i386_tpoff (info, relocation);
4406 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4407 because such sections are not SEC_ALLOC and thus ld.so will
4408 not process them. */
4409 if (unresolved_reloc
4410 && !((input_section->flags & SEC_DEBUGGING) != 0
4412 && _bfd_elf_section_offset (output_bfd, info, input_section,
4413 rel->r_offset) != (bfd_vma) -1)
4415 (*_bfd_error_handler)
4416 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4419 (long) rel->r_offset,
4421 h->root.root.string);
4426 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4427 contents, rel->r_offset,
4430 check_relocation_error:
4431 if (r != bfd_reloc_ok)
4436 name = h->root.root.string;
4439 name = bfd_elf_string_from_elf_section (input_bfd,
4440 symtab_hdr->sh_link,
4445 name = bfd_section_name (input_bfd, sec);
4448 if (r == bfd_reloc_overflow)
4450 if (! ((*info->callbacks->reloc_overflow)
4451 (info, (h ? &h->root : NULL), name, howto->name,
4452 (bfd_vma) 0, input_bfd, input_section,
4458 (*_bfd_error_handler)
4459 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4460 input_bfd, input_section,
4461 (long) rel->r_offset, name, (int) r);
4470 /* Finish up dynamic symbol handling. We set the contents of various
4471 dynamic sections here. */
4474 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4475 struct bfd_link_info *info,
4476 struct elf_link_hash_entry *h,
4477 Elf_Internal_Sym *sym)
4479 struct elf_i386_link_hash_table *htab;
4480 unsigned plt_entry_size;
4481 const struct elf_i386_backend_data *abed;
4483 htab = elf_i386_hash_table (info);
4487 abed = get_elf_i386_backend_data (output_bfd);
4488 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
4490 if (h->plt.offset != (bfd_vma) -1)
4494 Elf_Internal_Rela rel;
4496 asection *plt, *gotplt, *relplt;
4498 /* When building a static executable, use .iplt, .igot.plt and
4499 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4500 if (htab->elf.splt != NULL)
4502 plt = htab->elf.splt;
4503 gotplt = htab->elf.sgotplt;
4504 relplt = htab->elf.srelplt;
4508 plt = htab->elf.iplt;
4509 gotplt = htab->elf.igotplt;
4510 relplt = htab->elf.irelplt;
4513 /* This symbol has an entry in the procedure linkage table. Set
4516 if ((h->dynindx == -1
4517 && !((h->forced_local || info->executable)
4519 && h->type == STT_GNU_IFUNC))
4525 /* Get the index in the procedure linkage table which
4526 corresponds to this symbol. This is the index of this symbol
4527 in all the symbols for which we are making plt entries. The
4528 first entry in the procedure linkage table is reserved.
4530 Get the offset into the .got table of the entry that
4531 corresponds to this function. Each .got entry is 4 bytes.
4532 The first three are reserved.
4534 For static executables, we don't reserve anything. */
4536 if (plt == htab->elf.splt)
4538 got_offset = h->plt.offset / plt_entry_size - 1;
4539 got_offset = (got_offset + 3) * 4;
4543 got_offset = h->plt.offset / plt_entry_size;
4544 got_offset = got_offset * 4;
4547 /* Fill in the entry in the procedure linkage table. */
4550 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
4551 abed->plt->plt_entry_size);
4552 bfd_put_32 (output_bfd,
4553 (gotplt->output_section->vma
4554 + gotplt->output_offset
4556 plt->contents + h->plt.offset
4557 + abed->plt->plt_got_offset);
4559 if (abed->is_vxworks)
4561 int s, k, reloc_index;
4563 /* Create the R_386_32 relocation referencing the GOT
4564 for this PLT entry. */
4566 /* S: Current slot number (zero-based). */
4567 s = ((h->plt.offset - abed->plt->plt_entry_size)
4568 / abed->plt->plt_entry_size);
4569 /* K: Number of relocations for PLTResolve. */
4571 k = PLTRESOLVE_RELOCS_SHLIB;
4573 k = PLTRESOLVE_RELOCS;
4574 /* Skip the PLTresolve relocations, and the relocations for
4575 the other PLT slots. */
4576 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4577 loc = (htab->srelplt2->contents + reloc_index
4578 * sizeof (Elf32_External_Rel));
4580 rel.r_offset = (htab->elf.splt->output_section->vma
4581 + htab->elf.splt->output_offset
4582 + h->plt.offset + 2),
4583 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4584 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4586 /* Create the R_386_32 relocation referencing the beginning of
4587 the PLT for this GOT entry. */
4588 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4589 + htab->elf.sgotplt->output_offset
4591 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4592 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4593 loc + sizeof (Elf32_External_Rel));
4598 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
4599 abed->plt->plt_entry_size);
4600 bfd_put_32 (output_bfd, got_offset,
4601 plt->contents + h->plt.offset
4602 + abed->plt->plt_got_offset);
4605 /* Fill in the entry in the global offset table. */
4606 bfd_put_32 (output_bfd,
4607 (plt->output_section->vma
4608 + plt->output_offset
4610 + abed->plt->plt_lazy_offset),
4611 gotplt->contents + got_offset);
4613 /* Fill in the entry in the .rel.plt section. */
4614 rel.r_offset = (gotplt->output_section->vma
4615 + gotplt->output_offset
4617 if (h->dynindx == -1
4618 || ((info->executable
4619 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4621 && h->type == STT_GNU_IFUNC))
4623 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4624 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4625 in the .got.plt section. */
4626 bfd_put_32 (output_bfd,
4627 (h->root.u.def.value
4628 + h->root.u.def.section->output_section->vma
4629 + h->root.u.def.section->output_offset),
4630 gotplt->contents + got_offset);
4631 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4632 /* R_386_IRELATIVE comes last. */
4633 plt_index = htab->next_irelative_index--;
4637 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4638 plt_index = htab->next_jump_slot_index++;
4640 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4641 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4643 /* Don't fill PLT entry for static executables. */
4644 if (plt == htab->elf.splt)
4646 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4647 plt->contents + h->plt.offset
4648 + abed->plt->plt_reloc_offset);
4649 bfd_put_32 (output_bfd, - (h->plt.offset
4650 + abed->plt->plt_plt_offset + 4),
4651 plt->contents + h->plt.offset
4652 + abed->plt->plt_plt_offset);
4655 if (!h->def_regular)
4657 /* Mark the symbol as undefined, rather than as defined in
4658 the .plt section. Leave the value if there were any
4659 relocations where pointer equality matters (this is a clue
4660 for the dynamic linker, to make function pointer
4661 comparisons work between an application and shared
4662 library), otherwise set it to zero. If a function is only
4663 called from a binary, there is no need to slow down
4664 shared libraries because of that. */
4665 sym->st_shndx = SHN_UNDEF;
4666 if (!h->pointer_equality_needed)
4671 if (h->got.offset != (bfd_vma) -1
4672 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4673 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4675 Elf_Internal_Rela rel;
4678 /* This symbol has an entry in the global offset table. Set it
4681 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4684 rel.r_offset = (htab->elf.sgot->output_section->vma
4685 + htab->elf.sgot->output_offset
4686 + (h->got.offset & ~(bfd_vma) 1));
4688 /* If this is a static link, or it is a -Bsymbolic link and the
4689 symbol is defined locally or was forced to be local because
4690 of a version file, we just want to emit a RELATIVE reloc.
4691 The entry in the global offset table will already have been
4692 initialized in the relocate_section function. */
4694 && h->type == STT_GNU_IFUNC)
4698 /* Generate R_386_GLOB_DAT. */
4705 if (!h->pointer_equality_needed)
4708 /* For non-shared object, we can't use .got.plt, which
4709 contains the real function addres if we need pointer
4710 equality. We load the GOT entry with the PLT entry. */
4711 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4712 bfd_put_32 (output_bfd,
4713 (plt->output_section->vma
4714 + plt->output_offset + h->plt.offset),
4715 htab->elf.sgot->contents + h->got.offset);
4719 else if (info->shared
4720 && SYMBOL_REFERENCES_LOCAL (info, h))
4722 BFD_ASSERT((h->got.offset & 1) != 0);
4723 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4727 BFD_ASSERT((h->got.offset & 1) == 0);
4729 bfd_put_32 (output_bfd, (bfd_vma) 0,
4730 htab->elf.sgot->contents + h->got.offset);
4731 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4734 loc = htab->elf.srelgot->contents;
4735 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4736 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4741 Elf_Internal_Rela rel;
4744 /* This symbol needs a copy reloc. Set it up. */
4746 if (h->dynindx == -1
4747 || (h->root.type != bfd_link_hash_defined
4748 && h->root.type != bfd_link_hash_defweak)
4749 || htab->srelbss == NULL)
4752 rel.r_offset = (h->root.u.def.value
4753 + h->root.u.def.section->output_section->vma
4754 + h->root.u.def.section->output_offset);
4755 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4756 loc = htab->srelbss->contents;
4757 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
4758 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4764 /* Finish up local dynamic symbol handling. We set the contents of
4765 various dynamic sections here. */
4768 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4770 struct elf_link_hash_entry *h
4771 = (struct elf_link_hash_entry *) *slot;
4772 struct bfd_link_info *info
4773 = (struct bfd_link_info *) inf;
4775 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4779 /* Used to decide how to sort relocs in an optimal manner for the
4780 dynamic linker, before writing them out. */
4782 static enum elf_reloc_type_class
4783 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
4785 switch (ELF32_R_TYPE (rela->r_info))
4787 case R_386_RELATIVE:
4788 return reloc_class_relative;
4789 case R_386_JUMP_SLOT:
4790 return reloc_class_plt;
4792 return reloc_class_copy;
4794 return reloc_class_normal;
4798 /* Finish up the dynamic sections. */
4801 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4802 struct bfd_link_info *info)
4804 struct elf_i386_link_hash_table *htab;
4807 const struct elf_i386_backend_data *abed;
4809 htab = elf_i386_hash_table (info);
4813 dynobj = htab->elf.dynobj;
4814 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4815 abed = get_elf_i386_backend_data (output_bfd);
4817 if (htab->elf.dynamic_sections_created)
4819 Elf32_External_Dyn *dyncon, *dynconend;
4821 if (sdyn == NULL || htab->elf.sgot == NULL)
4824 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4825 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4826 for (; dyncon < dynconend; dyncon++)
4828 Elf_Internal_Dyn dyn;
4831 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4836 if (abed->is_vxworks
4837 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4842 s = htab->elf.sgotplt;
4843 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4847 s = htab->elf.srelplt;
4848 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4852 s = htab->elf.srelplt;
4853 dyn.d_un.d_val = s->size;
4857 /* My reading of the SVR4 ABI indicates that the
4858 procedure linkage table relocs (DT_JMPREL) should be
4859 included in the overall relocs (DT_REL). This is
4860 what Solaris does. However, UnixWare can not handle
4861 that case. Therefore, we override the DT_RELSZ entry
4862 here to make it not include the JMPREL relocs. */
4863 s = htab->elf.srelplt;
4866 dyn.d_un.d_val -= s->size;
4870 /* We may not be using the standard ELF linker script.
4871 If .rel.plt is the first .rel section, we adjust
4872 DT_REL to not include it. */
4873 s = htab->elf.srelplt;
4876 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4878 dyn.d_un.d_ptr += s->size;
4882 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4885 /* Fill in the first entry in the procedure linkage table. */
4886 if (htab->elf.splt && htab->elf.splt->size > 0)
4890 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
4891 abed->plt->plt0_entry_size);
4892 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
4893 abed->plt0_pad_byte,
4894 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
4898 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
4899 abed->plt->plt0_entry_size);
4900 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
4901 abed->plt0_pad_byte,
4902 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
4903 bfd_put_32 (output_bfd,
4904 (htab->elf.sgotplt->output_section->vma
4905 + htab->elf.sgotplt->output_offset
4907 htab->elf.splt->contents
4908 + abed->plt->plt0_got1_offset);
4909 bfd_put_32 (output_bfd,
4910 (htab->elf.sgotplt->output_section->vma
4911 + htab->elf.sgotplt->output_offset
4913 htab->elf.splt->contents
4914 + abed->plt->plt0_got2_offset);
4916 if (abed->is_vxworks)
4918 Elf_Internal_Rela rel;
4920 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4921 On IA32 we use REL relocations so the addend goes in
4922 the PLT directly. */
4923 rel.r_offset = (htab->elf.splt->output_section->vma
4924 + htab->elf.splt->output_offset
4925 + abed->plt->plt0_got1_offset);
4926 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4927 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4928 htab->srelplt2->contents);
4929 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4930 rel.r_offset = (htab->elf.splt->output_section->vma
4931 + htab->elf.splt->output_offset
4932 + abed->plt->plt0_got2_offset);
4933 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4934 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4935 htab->srelplt2->contents +
4936 sizeof (Elf32_External_Rel));
4940 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4941 really seem like the right value. */
4942 elf_section_data (htab->elf.splt->output_section)
4943 ->this_hdr.sh_entsize = 4;
4945 /* Correct the .rel.plt.unloaded relocations. */
4946 if (abed->is_vxworks && !info->shared)
4948 int num_plts = (htab->elf.splt->size
4949 / abed->plt->plt_entry_size) - 1;
4952 p = htab->srelplt2->contents;
4954 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4956 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4958 for (; num_plts; num_plts--)
4960 Elf_Internal_Rela rel;
4961 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4962 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4963 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4964 p += sizeof (Elf32_External_Rel);
4966 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4967 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4968 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4969 p += sizeof (Elf32_External_Rel);
4975 if (htab->elf.sgotplt)
4977 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4979 (*_bfd_error_handler)
4980 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4984 /* Fill in the first three entries in the global offset table. */
4985 if (htab->elf.sgotplt->size > 0)
4987 bfd_put_32 (output_bfd,
4989 : sdyn->output_section->vma + sdyn->output_offset),
4990 htab->elf.sgotplt->contents);
4991 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4992 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
4995 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
4998 /* Adjust .eh_frame for .plt section. */
4999 if (htab->plt_eh_frame != NULL
5000 && htab->plt_eh_frame->contents != NULL)
5002 if (htab->elf.splt != NULL
5003 && htab->elf.splt->size != 0
5004 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5005 && htab->elf.splt->output_section != NULL
5006 && htab->plt_eh_frame->output_section != NULL)
5008 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5009 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5010 + htab->plt_eh_frame->output_offset
5011 + PLT_FDE_START_OFFSET;
5012 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5013 htab->plt_eh_frame->contents
5014 + PLT_FDE_START_OFFSET);
5016 if (htab->plt_eh_frame->sec_info_type
5017 == SEC_INFO_TYPE_EH_FRAME)
5019 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5021 htab->plt_eh_frame->contents))
5026 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5027 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5029 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5030 htab_traverse (htab->loc_hash_table,
5031 elf_i386_finish_local_dynamic_symbol,
5037 /* Return address for Ith PLT stub in section PLT, for relocation REL
5038 or (bfd_vma) -1 if it should not be included. */
5041 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
5042 const arelent *rel ATTRIBUTE_UNUSED)
5044 return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner);
5047 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5050 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5052 if (h->plt.offset != (bfd_vma) -1
5054 && !h->pointer_equality_needed)
5057 return _bfd_elf_hash_symbol (h);
5060 /* Hook called by the linker routine which adds symbols from an object
5064 elf_i386_add_symbol_hook (bfd * abfd,
5065 struct bfd_link_info * info ATTRIBUTE_UNUSED,
5066 Elf_Internal_Sym * sym,
5067 const char ** namep ATTRIBUTE_UNUSED,
5068 flagword * flagsp ATTRIBUTE_UNUSED,
5069 asection ** secp ATTRIBUTE_UNUSED,
5070 bfd_vma * valp ATTRIBUTE_UNUSED)
5072 if ((abfd->flags & DYNAMIC) == 0
5073 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
5074 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
5075 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
5080 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
5081 #define TARGET_LITTLE_NAME "elf32-i386"
5082 #define ELF_ARCH bfd_arch_i386
5083 #define ELF_TARGET_ID I386_ELF_DATA
5084 #define ELF_MACHINE_CODE EM_386
5085 #define ELF_MAXPAGESIZE 0x1000
5087 #define elf_backend_can_gc_sections 1
5088 #define elf_backend_can_refcount 1
5089 #define elf_backend_want_got_plt 1
5090 #define elf_backend_plt_readonly 1
5091 #define elf_backend_want_plt_sym 0
5092 #define elf_backend_got_header_size 12
5093 #define elf_backend_plt_alignment 4
5095 /* Support RELA for objdump of prelink objects. */
5096 #define elf_info_to_howto elf_i386_info_to_howto_rel
5097 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5099 #define bfd_elf32_mkobject elf_i386_mkobject
5101 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5102 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5103 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
5104 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5105 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5107 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5108 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5109 #define elf_backend_check_relocs elf_i386_check_relocs
5110 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5111 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5112 #define elf_backend_fake_sections elf_i386_fake_sections
5113 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5114 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5115 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5116 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5117 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5118 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5119 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5120 #define elf_backend_relocate_section elf_i386_relocate_section
5121 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5122 #define elf_backend_always_size_sections elf_i386_always_size_sections
5123 #define elf_backend_omit_section_dynsym \
5124 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5125 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
5126 #define elf_backend_hash_symbol elf_i386_hash_symbol
5127 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5128 #undef elf_backend_post_process_headers
5129 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5131 #include "elf32-target.h"
5133 /* FreeBSD support. */
5135 #undef TARGET_LITTLE_SYM
5136 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
5137 #undef TARGET_LITTLE_NAME
5138 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5140 #define ELF_OSABI ELFOSABI_FREEBSD
5142 /* The kernel recognizes executables as valid only if they carry a
5143 "FreeBSD" label in the ELF header. So we put this label on all
5144 executables and (for simplicity) also all other object files. */
5147 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5149 _bfd_elf_set_osabi (abfd, info);
5151 #ifdef OLD_FREEBSD_ABI_LABEL
5152 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5153 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5157 #undef elf_backend_post_process_headers
5158 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5160 #define elf32_bed elf32_i386_fbsd_bed
5162 #undef elf_backend_add_symbol_hook
5164 #include "elf32-target.h"
5168 #undef TARGET_LITTLE_SYM
5169 #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
5170 #undef TARGET_LITTLE_NAME
5171 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5173 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5174 objects won't be recognized. */
5178 #define elf32_bed elf32_i386_sol2_bed
5180 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5182 #undef elf_backend_static_tls_alignment
5183 #define elf_backend_static_tls_alignment 8
5185 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5187 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5189 #undef elf_backend_want_plt_sym
5190 #define elf_backend_want_plt_sym 1
5192 #include "elf32-target.h"
5194 /* Native Client support. */
5196 #undef TARGET_LITTLE_SYM
5197 #define TARGET_LITTLE_SYM bfd_elf32_i386_nacl_vec
5198 #undef TARGET_LITTLE_NAME
5199 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5201 #define elf32_bed elf32_i386_nacl_bed
5203 #undef ELF_MAXPAGESIZE
5204 #define ELF_MAXPAGESIZE 0x10000
5206 /* Restore defaults. */
5208 #undef elf_backend_want_plt_sym
5209 #define elf_backend_want_plt_sym 0
5210 #undef elf_backend_post_process_headers
5211 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5212 #undef elf_backend_static_tls_alignment
5214 /* NaCl uses substantially different PLT entries for the same effects. */
5216 #undef elf_backend_plt_alignment
5217 #define elf_backend_plt_alignment 5
5218 #define NACL_PLT_ENTRY_SIZE 64
5219 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5221 static const bfd_byte elf_i386_nacl_plt0_entry[] =
5223 0xff, 0x35, /* pushl contents of address */
5224 0, 0, 0, 0, /* replaced with address of .got + 4. */
5225 0x8b, 0x0d, /* movl contents of address, %ecx */
5226 0, 0, 0, 0, /* replaced with address of .got + 8. */
5227 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5228 0xff, 0xe1 /* jmp *%ecx */
5231 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
5233 0x8b, 0x0d, /* movl contents of address, %ecx */
5234 0, 0, 0, 0, /* replaced with GOT slot address. */
5235 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
5236 0xff, 0xe1, /* jmp *%ecx */
5238 /* Pad to the next 32-byte boundary with nop instructions. */
5240 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5241 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5243 /* Lazy GOT entries point here (32-byte aligned). */
5244 0x68, /* pushl immediate */
5245 0, 0, 0, 0, /* replaced with reloc offset. */
5246 0xe9, /* jmp relative */
5247 0, 0, 0, 0, /* replaced with offset to .plt. */
5249 /* Pad to the next 32-byte boundary with nop instructions. */
5250 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5251 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5255 static const bfd_byte
5256 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
5258 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5259 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5260 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5261 0xff, 0xe1, /* jmp *%ecx */
5263 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5264 so pad to that size with nop instructions. */
5265 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5268 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
5270 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5271 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5272 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5273 0xff, 0xe1, /* jmp *%ecx */
5275 /* Pad to the next 32-byte boundary with nop instructions. */
5277 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5278 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5280 /* Lazy GOT entries point here (32-byte aligned). */
5281 0x68, /* pushl immediate */
5282 0, 0, 0, 0, /* replaced with offset into relocation table. */
5283 0xe9, /* jmp relative */
5284 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5286 /* Pad to the next 32-byte boundary with nop instructions. */
5287 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5288 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5292 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
5294 #if (PLT_CIE_LENGTH != 20 \
5295 || PLT_FDE_LENGTH != 36 \
5296 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5297 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5298 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5300 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
5301 0, 0, 0, 0, /* CIE ID */
5302 1, /* CIE version */
5303 'z', 'R', 0, /* Augmentation string */
5304 1, /* Code alignment factor */
5305 0x7c, /* Data alignment factor: -4 */
5306 8, /* Return address column */
5307 1, /* Augmentation size */
5308 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
5309 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5310 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5311 DW_CFA_nop, DW_CFA_nop,
5313 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
5314 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
5315 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5316 0, 0, 0, 0, /* .plt size goes here */
5317 0, /* Augmentation size */
5318 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
5319 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5320 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
5321 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5322 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
5323 13, /* Block length */
5324 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
5325 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
5326 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
5327 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
5328 DW_CFA_nop, DW_CFA_nop
5331 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
5333 elf_i386_nacl_plt0_entry, /* plt0_entry */
5334 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
5335 2, /* plt0_got1_offset */
5336 8, /* plt0_got2_offset */
5337 elf_i386_nacl_plt_entry, /* plt_entry */
5338 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
5339 2, /* plt_got_offset */
5340 33, /* plt_reloc_offset */
5341 38, /* plt_plt_offset */
5342 32, /* plt_lazy_offset */
5343 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
5344 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
5345 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
5346 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
5349 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
5351 &elf_i386_nacl_plt, /* plt */
5352 0x90, /* plt0_pad_byte: nop insn */
5356 #undef elf_backend_arch_data
5357 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5359 #undef elf_backend_modify_segment_map
5360 #define elf_backend_modify_segment_map nacl_modify_segment_map
5361 #undef elf_backend_modify_program_headers
5362 #define elf_backend_modify_program_headers nacl_modify_program_headers
5364 #include "elf32-target.h"
5366 /* Restore defaults. */
5367 #undef elf_backend_modify_segment_map
5368 #undef elf_backend_modify_program_headers
5370 /* VxWorks support. */
5372 #undef TARGET_LITTLE_SYM
5373 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
5374 #undef TARGET_LITTLE_NAME
5375 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5377 #undef elf_backend_plt_alignment
5378 #define elf_backend_plt_alignment 4
5380 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
5382 &elf_i386_plt, /* plt */
5383 0x90, /* plt0_pad_byte */
5387 #undef elf_backend_arch_data
5388 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5390 #undef elf_backend_relocs_compatible
5391 #undef elf_backend_post_process_headers
5392 #undef elf_backend_add_symbol_hook
5393 #define elf_backend_add_symbol_hook \
5394 elf_vxworks_add_symbol_hook
5395 #undef elf_backend_link_output_symbol_hook
5396 #define elf_backend_link_output_symbol_hook \
5397 elf_vxworks_link_output_symbol_hook
5398 #undef elf_backend_emit_relocs
5399 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5400 #undef elf_backend_final_write_processing
5401 #define elf_backend_final_write_processing \
5402 elf_vxworks_final_write_processing
5403 #undef elf_backend_static_tls_alignment
5405 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5407 #undef elf_backend_want_plt_sym
5408 #define elf_backend_want_plt_sym 1
5411 #define elf32_bed elf32_i386_vxworks_bed
5413 #include "elf32-target.h"