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 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
30 /* 386 uses REL relocations instead of RELA. */
35 static reloc_howto_type elf_howto_table[]=
37 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
38 bfd_elf_generic_reloc, "R_386_NONE",
39 TRUE, 0x00000000, 0x00000000, FALSE),
40 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
41 bfd_elf_generic_reloc, "R_386_32",
42 TRUE, 0xffffffff, 0xffffffff, FALSE),
43 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
44 bfd_elf_generic_reloc, "R_386_PC32",
45 TRUE, 0xffffffff, 0xffffffff, TRUE),
46 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
47 bfd_elf_generic_reloc, "R_386_GOT32",
48 TRUE, 0xffffffff, 0xffffffff, FALSE),
49 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
50 bfd_elf_generic_reloc, "R_386_PLT32",
51 TRUE, 0xffffffff, 0xffffffff, TRUE),
52 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
53 bfd_elf_generic_reloc, "R_386_COPY",
54 TRUE, 0xffffffff, 0xffffffff, FALSE),
55 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_386_RELATIVE",
63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_386_GOTOFF",
66 TRUE, 0xffffffff, 0xffffffff, FALSE),
67 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_386_GOTPC",
69 TRUE, 0xffffffff, 0xffffffff, TRUE),
71 /* We have a gap in the reloc numbers here.
72 R_386_standard counts the number up to this point, and
73 R_386_ext_offset is the value to subtract from a reloc type of
74 R_386_16 thru R_386_PC8 to form an index into this table. */
75 #define R_386_standard (R_386_GOTPC + 1)
76 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
78 /* These relocs are a GNU extension. */
79 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
81 TRUE, 0xffffffff, 0xffffffff, FALSE),
82 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_386_TLS_IE",
84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_386_TLS_LE",
90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_386_TLS_GD",
93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_386_TLS_LDM",
96 TRUE, 0xffffffff, 0xffffffff, FALSE),
97 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_386_16",
99 TRUE, 0xffff, 0xffff, FALSE),
100 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_386_PC16",
102 TRUE, 0xffff, 0xffff, TRUE),
103 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_386_8",
105 TRUE, 0xff, 0xff, FALSE),
106 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
107 bfd_elf_generic_reloc, "R_386_PC8",
108 TRUE, 0xff, 0xff, TRUE),
110 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
111 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
112 /* These are common with Solaris TLS implementation. */
113 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
115 TRUE, 0xffffffff, 0xffffffff, FALSE),
116 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
127 TRUE, 0xffffffff, 0xffffffff, FALSE),
128 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
130 TRUE, 0xffffffff, 0xffffffff, FALSE),
132 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
134 TRUE, 0xffffffff, 0xffffffff, FALSE),
135 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
136 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
138 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_386_TLS_DESC",
140 TRUE, 0xffffffff, 0xffffffff, FALSE),
143 #define R_386_tls (R_386_TLS_DESC + 1 - R_386_tls_offset)
144 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
146 /* GNU extension to record C++ vtable hierarchy. */
147 HOWTO (R_386_GNU_VTINHERIT, /* type */
149 2, /* size (0 = byte, 1 = short, 2 = long) */
151 FALSE, /* pc_relative */
153 complain_overflow_dont, /* complain_on_overflow */
154 NULL, /* special_function */
155 "R_386_GNU_VTINHERIT", /* name */
156 FALSE, /* partial_inplace */
159 FALSE), /* pcrel_offset */
161 /* GNU extension to record C++ vtable member usage. */
162 HOWTO (R_386_GNU_VTENTRY, /* type */
164 2, /* size (0 = byte, 1 = short, 2 = long) */
166 FALSE, /* pc_relative */
168 complain_overflow_dont, /* complain_on_overflow */
169 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
170 "R_386_GNU_VTENTRY", /* name */
171 FALSE, /* partial_inplace */
174 FALSE) /* pcrel_offset */
176 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
180 #ifdef DEBUG_GEN_RELOC
182 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
187 static reloc_howto_type *
188 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
189 bfd_reloc_code_real_type code)
194 TRACE ("BFD_RELOC_NONE");
195 return &elf_howto_table[R_386_NONE];
198 TRACE ("BFD_RELOC_32");
199 return &elf_howto_table[R_386_32];
202 TRACE ("BFD_RELOC_CTOR");
203 return &elf_howto_table[R_386_32];
205 case BFD_RELOC_32_PCREL:
206 TRACE ("BFD_RELOC_PC32");
207 return &elf_howto_table[R_386_PC32];
209 case BFD_RELOC_386_GOT32:
210 TRACE ("BFD_RELOC_386_GOT32");
211 return &elf_howto_table[R_386_GOT32];
213 case BFD_RELOC_386_PLT32:
214 TRACE ("BFD_RELOC_386_PLT32");
215 return &elf_howto_table[R_386_PLT32];
217 case BFD_RELOC_386_COPY:
218 TRACE ("BFD_RELOC_386_COPY");
219 return &elf_howto_table[R_386_COPY];
221 case BFD_RELOC_386_GLOB_DAT:
222 TRACE ("BFD_RELOC_386_GLOB_DAT");
223 return &elf_howto_table[R_386_GLOB_DAT];
225 case BFD_RELOC_386_JUMP_SLOT:
226 TRACE ("BFD_RELOC_386_JUMP_SLOT");
227 return &elf_howto_table[R_386_JUMP_SLOT];
229 case BFD_RELOC_386_RELATIVE:
230 TRACE ("BFD_RELOC_386_RELATIVE");
231 return &elf_howto_table[R_386_RELATIVE];
233 case BFD_RELOC_386_GOTOFF:
234 TRACE ("BFD_RELOC_386_GOTOFF");
235 return &elf_howto_table[R_386_GOTOFF];
237 case BFD_RELOC_386_GOTPC:
238 TRACE ("BFD_RELOC_386_GOTPC");
239 return &elf_howto_table[R_386_GOTPC];
241 /* These relocs are a GNU extension. */
242 case BFD_RELOC_386_TLS_TPOFF:
243 TRACE ("BFD_RELOC_386_TLS_TPOFF");
244 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
246 case BFD_RELOC_386_TLS_IE:
247 TRACE ("BFD_RELOC_386_TLS_IE");
248 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
250 case BFD_RELOC_386_TLS_GOTIE:
251 TRACE ("BFD_RELOC_386_TLS_GOTIE");
252 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
254 case BFD_RELOC_386_TLS_LE:
255 TRACE ("BFD_RELOC_386_TLS_LE");
256 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
258 case BFD_RELOC_386_TLS_GD:
259 TRACE ("BFD_RELOC_386_TLS_GD");
260 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
262 case BFD_RELOC_386_TLS_LDM:
263 TRACE ("BFD_RELOC_386_TLS_LDM");
264 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
267 TRACE ("BFD_RELOC_16");
268 return &elf_howto_table[R_386_16 - R_386_ext_offset];
270 case BFD_RELOC_16_PCREL:
271 TRACE ("BFD_RELOC_16_PCREL");
272 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
275 TRACE ("BFD_RELOC_8");
276 return &elf_howto_table[R_386_8 - R_386_ext_offset];
278 case BFD_RELOC_8_PCREL:
279 TRACE ("BFD_RELOC_8_PCREL");
280 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
282 /* Common with Sun TLS implementation. */
283 case BFD_RELOC_386_TLS_LDO_32:
284 TRACE ("BFD_RELOC_386_TLS_LDO_32");
285 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
287 case BFD_RELOC_386_TLS_IE_32:
288 TRACE ("BFD_RELOC_386_TLS_IE_32");
289 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
291 case BFD_RELOC_386_TLS_LE_32:
292 TRACE ("BFD_RELOC_386_TLS_LE_32");
293 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
295 case BFD_RELOC_386_TLS_DTPMOD32:
296 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
297 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
299 case BFD_RELOC_386_TLS_DTPOFF32:
300 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
301 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
303 case BFD_RELOC_386_TLS_TPOFF32:
304 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
305 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
307 case BFD_RELOC_386_TLS_GOTDESC:
308 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
309 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
311 case BFD_RELOC_386_TLS_DESC_CALL:
312 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
313 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
315 case BFD_RELOC_386_TLS_DESC:
316 TRACE ("BFD_RELOC_386_TLS_DESC");
317 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
319 case BFD_RELOC_VTABLE_INHERIT:
320 TRACE ("BFD_RELOC_VTABLE_INHERIT");
321 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
323 case BFD_RELOC_VTABLE_ENTRY:
324 TRACE ("BFD_RELOC_VTABLE_ENTRY");
325 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
335 static reloc_howto_type *
336 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
341 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
342 if (elf_howto_table[i].name != NULL
343 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
344 return &elf_howto_table[i];
349 static reloc_howto_type *
350 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
354 if ((indx = r_type) >= R_386_standard
355 && ((indx = r_type - R_386_ext_offset) - R_386_standard
356 >= R_386_ext - R_386_standard)
357 && ((indx = r_type - R_386_tls_offset) - R_386_ext
358 >= R_386_tls - R_386_ext)
359 && ((indx = r_type - R_386_vt_offset) - R_386_tls
360 >= R_386_vt - R_386_tls))
362 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
366 BFD_ASSERT (elf_howto_table [indx].type == r_type);
367 return &elf_howto_table[indx];
371 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
373 Elf_Internal_Rela *dst)
375 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
376 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
379 /* Return whether a symbol name implies a local label. The UnixWare
380 2.1 cc generates temporary symbols that start with .X, so we
381 recognize them here. FIXME: do other SVR4 compilers also use .X?.
382 If so, we should move the .X recognition into
383 _bfd_elf_is_local_label_name. */
386 elf_i386_is_local_label_name (bfd *abfd, const char *name)
388 if (name[0] == '.' && name[1] == 'X')
391 return _bfd_elf_is_local_label_name (abfd, name);
394 /* Support for core dump NOTE sections. */
397 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
402 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
404 int pr_version = bfd_get_32 (abfd, note->descdata);
410 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
413 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
417 size = bfd_get_32 (abfd, note->descdata + 8);
421 switch (note->descsz)
426 case 144: /* Linux/i386 */
428 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
431 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
441 /* Make a ".reg/999" section. */
442 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
443 size, note->descpos + offset);
447 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
449 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
451 int pr_version = bfd_get_32 (abfd, note->descdata);
456 elf_tdata (abfd)->core_program
457 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
458 elf_tdata (abfd)->core_command
459 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
463 switch (note->descsz)
468 case 124: /* Linux/i386 elf_prpsinfo. */
469 elf_tdata (abfd)->core_program
470 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
471 elf_tdata (abfd)->core_command
472 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
476 /* Note that for some reason, a spurious space is tacked
477 onto the end of the args in some (at least one anyway)
478 implementations, so strip it off if it exists. */
480 char *command = elf_tdata (abfd)->core_command;
481 int n = strlen (command);
483 if (0 < n && command[n - 1] == ' ')
484 command[n - 1] = '\0';
490 /* Functions for the i386 ELF linker.
492 In order to gain some understanding of code in this file without
493 knowing all the intricate details of the linker, note the
496 Functions named elf_i386_* are called by external routines, other
497 functions are only called locally. elf_i386_* functions appear
498 in this file more or less in the order in which they are called
499 from external routines. eg. elf_i386_check_relocs is called
500 early in the link process, elf_i386_finish_dynamic_sections is
501 one of the last functions. */
504 /* The name of the dynamic interpreter. This is put in the .interp
507 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
509 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
510 copying dynamic variables from a shared lib into an app's dynbss
511 section, and instead use a dynamic relocation to point into the
513 #define ELIMINATE_COPY_RELOCS 1
515 /* The size in bytes of an entry in the procedure linkage table. */
517 #define PLT_ENTRY_SIZE 16
519 /* The first entry in an absolute procedure linkage table looks like
520 this. See the SVR4 ABI i386 supplement to see how this works.
521 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
523 static const bfd_byte elf_i386_plt0_entry[12] =
525 0xff, 0x35, /* pushl contents of address */
526 0, 0, 0, 0, /* replaced with address of .got + 4. */
527 0xff, 0x25, /* jmp indirect */
528 0, 0, 0, 0 /* replaced with address of .got + 8. */
531 /* Subsequent entries in an absolute procedure linkage table look like
534 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
536 0xff, 0x25, /* jmp indirect */
537 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
538 0x68, /* pushl immediate */
539 0, 0, 0, 0, /* replaced with offset into relocation table. */
540 0xe9, /* jmp relative */
541 0, 0, 0, 0 /* replaced with offset to start of .plt. */
544 /* The first entry in a PIC procedure linkage table look like this.
545 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
547 static const bfd_byte elf_i386_pic_plt0_entry[12] =
549 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
550 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
553 /* Subsequent entries in a PIC procedure linkage table look like this. */
555 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
557 0xff, 0xa3, /* jmp *offset(%ebx) */
558 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
559 0x68, /* pushl immediate */
560 0, 0, 0, 0, /* replaced with offset into relocation table. */
561 0xe9, /* jmp relative */
562 0, 0, 0, 0 /* replaced with offset to start of .plt. */
565 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
566 for the PLTResolve stub and then for each PLT entry. */
567 #define PLTRESOLVE_RELOCS_SHLIB 0
568 #define PLTRESOLVE_RELOCS 2
569 #define PLT_NON_JUMP_SLOT_RELOCS 2
571 /* The i386 linker needs to keep track of the number of relocs that it
572 decides to copy as dynamic relocs in check_relocs for each symbol.
573 This is so that it can later discard them if they are found to be
574 unnecessary. We store the information in a field extending the
575 regular ELF linker hash table. */
577 struct elf_i386_dyn_relocs
579 struct elf_i386_dyn_relocs *next;
581 /* The input section of the reloc. */
584 /* Total number of relocs copied for the input section. */
587 /* Number of pc-relative relocs copied for the input section. */
588 bfd_size_type pc_count;
591 /* i386 ELF linker hash entry. */
593 struct elf_i386_link_hash_entry
595 struct elf_link_hash_entry elf;
597 /* Track dynamic relocs copied for this symbol. */
598 struct elf_i386_dyn_relocs *dyn_relocs;
600 #define GOT_UNKNOWN 0
604 #define GOT_TLS_IE_POS 5
605 #define GOT_TLS_IE_NEG 6
606 #define GOT_TLS_IE_BOTH 7
607 #define GOT_TLS_GDESC 8
608 #define GOT_TLS_GD_BOTH_P(type) \
609 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
610 #define GOT_TLS_GD_P(type) \
611 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
612 #define GOT_TLS_GDESC_P(type) \
613 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
614 #define GOT_TLS_GD_ANY_P(type) \
615 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
616 unsigned char tls_type;
618 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
619 starting at the end of the jump table. */
623 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
625 struct elf_i386_obj_tdata
627 struct elf_obj_tdata root;
629 /* tls_type for each local got entry. */
630 char *local_got_tls_type;
632 /* GOTPLT entries for TLS descriptors. */
633 bfd_vma *local_tlsdesc_gotent;
636 #define elf_i386_tdata(abfd) \
637 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
639 #define elf_i386_local_got_tls_type(abfd) \
640 (elf_i386_tdata (abfd)->local_got_tls_type)
642 #define elf_i386_local_tlsdesc_gotent(abfd) \
643 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
646 elf_i386_mkobject (bfd *abfd)
648 if (abfd->tdata.any == NULL)
650 bfd_size_type amt = sizeof (struct elf_i386_obj_tdata);
651 abfd->tdata.any = bfd_zalloc (abfd, amt);
652 if (abfd->tdata.any == NULL)
655 return bfd_elf_mkobject (abfd);
658 /* i386 ELF linker hash table. */
660 struct elf_i386_link_hash_table
662 struct elf_link_hash_table elf;
664 /* Short-cuts to get to dynamic linker sections. */
673 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
676 /* True if the target system is VxWorks. */
679 /* Value used to fill the last word of the first plt entry. */
680 bfd_byte plt0_pad_byte;
682 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
683 bfd_vma next_tls_desc_index;
686 bfd_signed_vma refcount;
690 /* The amount of space used by the reserved portion of the sgotplt
691 section, plus whatever space is used by the jump slots. */
692 bfd_vma sgotplt_jump_table_size;
694 /* Small local sym to section mapping cache. */
695 struct sym_sec_cache sym_sec;
698 /* Get the i386 ELF linker hash table from a link_info structure. */
700 #define elf_i386_hash_table(p) \
701 ((struct elf_i386_link_hash_table *) ((p)->hash))
703 #define elf_i386_compute_jump_table_size(htab) \
704 ((htab)->next_tls_desc_index * 4)
706 /* Create an entry in an i386 ELF linker hash table. */
708 static struct bfd_hash_entry *
709 link_hash_newfunc (struct bfd_hash_entry *entry,
710 struct bfd_hash_table *table,
713 /* Allocate the structure if it has not already been allocated by a
717 entry = bfd_hash_allocate (table,
718 sizeof (struct elf_i386_link_hash_entry));
723 /* Call the allocation method of the superclass. */
724 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
727 struct elf_i386_link_hash_entry *eh;
729 eh = (struct elf_i386_link_hash_entry *) entry;
730 eh->dyn_relocs = NULL;
731 eh->tls_type = GOT_UNKNOWN;
732 eh->tlsdesc_got = (bfd_vma) -1;
738 /* Create an i386 ELF linker hash table. */
740 static struct bfd_link_hash_table *
741 elf_i386_link_hash_table_create (bfd *abfd)
743 struct elf_i386_link_hash_table *ret;
744 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
746 ret = bfd_malloc (amt);
750 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
751 sizeof (struct elf_i386_link_hash_entry)))
764 ret->tls_ldm_got.refcount = 0;
765 ret->next_tls_desc_index = 0;
766 ret->sgotplt_jump_table_size = 0;
767 ret->sym_sec.abfd = NULL;
769 ret->srelplt2 = NULL;
770 ret->plt0_pad_byte = 0;
772 return &ret->elf.root;
775 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
776 shortcuts to them in our hash table. */
779 create_got_section (bfd *dynobj, struct bfd_link_info *info)
781 struct elf_i386_link_hash_table *htab;
783 if (! _bfd_elf_create_got_section (dynobj, info))
786 htab = elf_i386_hash_table (info);
787 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
788 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
789 if (!htab->sgot || !htab->sgotplt)
792 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got",
793 (SEC_ALLOC | SEC_LOAD
798 if (htab->srelgot == NULL
799 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
804 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
805 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
809 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
811 struct elf_i386_link_hash_table *htab;
813 htab = elf_i386_hash_table (info);
814 if (!htab->sgot && !create_got_section (dynobj, info))
817 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
820 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
821 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
822 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
824 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
826 if (!htab->splt || !htab->srelplt || !htab->sdynbss
827 || (!info->shared && !htab->srelbss))
831 && !elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
837 /* Copy the extra info we tack onto an elf_link_hash_entry. */
840 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
841 struct elf_link_hash_entry *dir,
842 struct elf_link_hash_entry *ind)
844 struct elf_i386_link_hash_entry *edir, *eind;
846 edir = (struct elf_i386_link_hash_entry *) dir;
847 eind = (struct elf_i386_link_hash_entry *) ind;
849 if (eind->dyn_relocs != NULL)
851 if (edir->dyn_relocs != NULL)
853 struct elf_i386_dyn_relocs **pp;
854 struct elf_i386_dyn_relocs *p;
856 /* Add reloc counts against the indirect sym to the direct sym
857 list. Merge any entries against the same section. */
858 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
860 struct elf_i386_dyn_relocs *q;
862 for (q = edir->dyn_relocs; q != NULL; q = q->next)
863 if (q->sec == p->sec)
865 q->pc_count += p->pc_count;
866 q->count += p->count;
873 *pp = edir->dyn_relocs;
876 edir->dyn_relocs = eind->dyn_relocs;
877 eind->dyn_relocs = NULL;
880 if (ind->root.type == bfd_link_hash_indirect
881 && dir->got.refcount <= 0)
883 edir->tls_type = eind->tls_type;
884 eind->tls_type = GOT_UNKNOWN;
887 if (ELIMINATE_COPY_RELOCS
888 && ind->root.type != bfd_link_hash_indirect
889 && dir->dynamic_adjusted)
891 /* If called to transfer flags for a weakdef during processing
892 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
893 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
894 dir->ref_dynamic |= ind->ref_dynamic;
895 dir->ref_regular |= ind->ref_regular;
896 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
897 dir->needs_plt |= ind->needs_plt;
898 dir->pointer_equality_needed |= ind->pointer_equality_needed;
901 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
911 /* Return TRUE if the TLS access code sequence support transition
915 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
917 Elf_Internal_Shdr *symtab_hdr,
918 struct elf_link_hash_entry **sym_hashes,
920 const Elf_Internal_Rela *rel,
921 const Elf_Internal_Rela *relend)
923 unsigned int val, type;
924 unsigned long r_symndx;
925 struct elf_link_hash_entry *h;
928 /* Get the section contents. */
929 if (contents == NULL)
931 if (elf_section_data (sec)->this_hdr.contents != NULL)
932 contents = elf_section_data (sec)->this_hdr.contents;
935 /* FIXME: How to better handle error condition? */
936 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
939 /* Cache the section contents for elf_link_input_bfd. */
940 elf_section_data (sec)->this_hdr.contents = contents;
944 offset = rel->r_offset;
949 if (offset < 2 || (rel + 1) >= relend)
952 type = bfd_get_8 (abfd, contents + offset - 2);
953 if (r_type == R_386_TLS_GD)
955 /* Check transition from LD access model. Only
956 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
957 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
958 can transit to different access model. */
959 if ((offset + 10) > sec->size ||
960 (type != 0x8d && type != 0x04))
963 val = bfd_get_8 (abfd, contents + offset - 1);
966 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
970 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
973 if ((val & 0xc7) != 0x05 || val == (4 << 3))
978 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
979 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
982 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
988 /* Check transition from LD access model. Only
989 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
990 can transit to different access model. */
991 if (type != 0x8d || (offset + 9) > sec->size)
994 val = bfd_get_8 (abfd, contents + offset - 1);
995 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
999 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1002 r_symndx = ELF32_R_SYM (rel[1].r_info);
1003 if (r_symndx < symtab_hdr->sh_info)
1006 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1008 && h->root.root.string != NULL
1009 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1010 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1011 && (strcmp (h->root.root.string, "___tls_get_addr") == 0));
1014 /* Check transition from IE access model:
1015 movl foo@indntpoff(%rip), %eax
1016 movl foo@indntpoff(%rip), %reg
1017 addl foo@indntpoff(%rip), %reg
1020 if (offset < 1 || (offset + 4) > sec->size)
1023 /* Check "movl foo@tpoff(%rip), %eax" first. */
1024 val = bfd_get_8 (abfd, contents + offset - 1);
1031 /* Check movl|addl foo@tpoff(%rip), %reg. */
1032 type = bfd_get_8 (abfd, contents + offset - 2);
1033 return ((type == 0x8b || type == 0x03)
1034 && (val & 0xc7) == 0x05);
1036 case R_386_TLS_GOTIE:
1037 case R_386_TLS_IE_32:
1038 /* Check transition from {IE_32,GOTIE} access model:
1039 subl foo@{tpoff,gontoff}(%reg1), %reg2
1040 movl foo@{tpoff,gontoff}(%reg1), %reg2
1041 addl foo@{tpoff,gontoff}(%reg1), %reg2
1044 if (offset < 2 || (offset + 4) > sec->size)
1047 val = bfd_get_8 (abfd, contents + offset - 1);
1048 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1051 type = bfd_get_8 (abfd, contents + offset - 2);
1052 return type == 0x8b || type == 0x2b || type == 0x03;
1054 case R_386_TLS_GOTDESC:
1055 /* Check transition from GDesc access model:
1056 leal x@tlsdesc(%ebx), %eax
1058 Make sure it's a leal adding ebx to a 32-bit offset
1059 into any register, although it's probably almost always
1062 if (offset < 2 || (offset + 4) > sec->size)
1065 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1068 val = bfd_get_8 (abfd, contents + offset - 1);
1069 return (val & 0xc7) == 0x83;
1071 case R_386_TLS_DESC_CALL:
1072 /* Check transition from GDesc access model:
1073 call *x@tlsdesc(%rax)
1075 if (offset + 2 <= sec->size)
1077 /* Make sure that it's a call *x@tlsdesc(%rax). */
1078 static i386_opcode16 call = { { 0xff, 0x10 } };
1079 return bfd_get_16 (abfd, contents + offset) == call.i;
1089 /* Return TRUE if the TLS access transition is OK or no transition
1090 will be performed. Update R_TYPE if there is a transition. */
1093 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1094 asection *sec, bfd_byte *contents,
1095 Elf_Internal_Shdr *symtab_hdr,
1096 struct elf_link_hash_entry **sym_hashes,
1097 unsigned int *r_type, int tls_type,
1098 const Elf_Internal_Rela *rel,
1099 const Elf_Internal_Rela *relend,
1100 struct elf_link_hash_entry *h)
1102 unsigned int from_type = *r_type;
1103 unsigned int to_type = from_type;
1104 bfd_boolean check = TRUE;
1109 case R_386_TLS_GOTDESC:
1110 case R_386_TLS_DESC_CALL:
1111 case R_386_TLS_IE_32:
1113 case R_386_TLS_GOTIE:
1117 to_type = R_386_TLS_LE_32;
1118 else if (from_type != R_386_TLS_IE
1119 && from_type != R_386_TLS_GOTIE)
1120 to_type = R_386_TLS_IE_32;
1123 /* When we are called from elf_i386_relocate_section, CONTENTS
1124 isn't NULL and there may be additional transitions based on
1126 if (contents != NULL)
1128 unsigned int new_to_type = to_type;
1133 && (tls_type & GOT_TLS_IE))
1134 new_to_type = R_386_TLS_LE_32;
1136 if (to_type == R_386_TLS_GD
1137 || to_type == R_386_TLS_GOTDESC
1138 || to_type == R_386_TLS_DESC_CALL)
1140 if (tls_type == GOT_TLS_IE_POS)
1141 new_to_type = R_386_TLS_GOTIE;
1142 else if (tls_type & GOT_TLS_IE)
1143 new_to_type = R_386_TLS_IE_32;
1146 /* We checked the transition before when we were called from
1147 elf_i386_check_relocs. We only want to check the new
1148 transition which hasn't been checked before. */
1149 check = new_to_type != to_type && from_type == to_type;
1150 to_type = new_to_type;
1157 to_type = R_386_TLS_LE_32;
1164 /* Return TRUE if there is no transition. */
1165 if (from_type == to_type)
1168 /* Check if the transition can be performed. */
1170 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1171 symtab_hdr, sym_hashes,
1172 from_type, rel, relend))
1174 reloc_howto_type *from, *to;
1176 from = elf_i386_rtype_to_howto (abfd, from_type);
1177 to = elf_i386_rtype_to_howto (abfd, to_type);
1179 (*_bfd_error_handler)
1180 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1181 "in section `%A' failed"),
1182 abfd, sec, from->name, to->name,
1183 h ? h->root.root.string : "a local symbol",
1184 (unsigned long) rel->r_offset);
1185 bfd_set_error (bfd_error_bad_value);
1193 /* Look through the relocs for a section during the first phase, and
1194 calculate needed space in the global offset table, procedure linkage
1195 table, and dynamic reloc sections. */
1198 elf_i386_check_relocs (bfd *abfd,
1199 struct bfd_link_info *info,
1201 const Elf_Internal_Rela *relocs)
1203 struct elf_i386_link_hash_table *htab;
1204 Elf_Internal_Shdr *symtab_hdr;
1205 struct elf_link_hash_entry **sym_hashes;
1206 const Elf_Internal_Rela *rel;
1207 const Elf_Internal_Rela *rel_end;
1210 if (info->relocatable)
1213 htab = elf_i386_hash_table (info);
1214 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1215 sym_hashes = elf_sym_hashes (abfd);
1219 rel_end = relocs + sec->reloc_count;
1220 for (rel = relocs; rel < rel_end; rel++)
1222 unsigned int r_type;
1223 unsigned long r_symndx;
1224 struct elf_link_hash_entry *h;
1226 r_symndx = ELF32_R_SYM (rel->r_info);
1227 r_type = ELF32_R_TYPE (rel->r_info);
1229 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1231 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1237 if (r_symndx < symtab_hdr->sh_info)
1241 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1242 while (h->root.type == bfd_link_hash_indirect
1243 || h->root.type == bfd_link_hash_warning)
1244 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1247 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1248 symtab_hdr, sym_hashes,
1249 &r_type, GOT_UNKNOWN,
1256 htab->tls_ldm_got.refcount += 1;
1260 /* This symbol requires a procedure linkage table entry. We
1261 actually build the entry in adjust_dynamic_symbol,
1262 because this might be a case of linking PIC code which is
1263 never referenced by a dynamic object, in which case we
1264 don't need to generate a procedure linkage table entry
1267 /* If this is a local symbol, we resolve it directly without
1268 creating a procedure linkage table entry. */
1273 h->plt.refcount += 1;
1276 case R_386_TLS_IE_32:
1278 case R_386_TLS_GOTIE:
1280 info->flags |= DF_STATIC_TLS;
1285 case R_386_TLS_GOTDESC:
1286 case R_386_TLS_DESC_CALL:
1287 /* This symbol requires a global offset table entry. */
1289 int tls_type, old_tls_type;
1294 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1295 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1296 case R_386_TLS_GOTDESC:
1297 case R_386_TLS_DESC_CALL:
1298 tls_type = GOT_TLS_GDESC; break;
1299 case R_386_TLS_IE_32:
1300 if (ELF32_R_TYPE (rel->r_info) == r_type)
1301 tls_type = GOT_TLS_IE_NEG;
1303 /* If this is a GD->IE transition, we may use either of
1304 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1305 tls_type = GOT_TLS_IE;
1308 case R_386_TLS_GOTIE:
1309 tls_type = GOT_TLS_IE_POS; break;
1314 h->got.refcount += 1;
1315 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1319 bfd_signed_vma *local_got_refcounts;
1321 /* This is a global offset table entry for a local symbol. */
1322 local_got_refcounts = elf_local_got_refcounts (abfd);
1323 if (local_got_refcounts == NULL)
1327 size = symtab_hdr->sh_info;
1328 size *= (sizeof (bfd_signed_vma)
1329 + sizeof (bfd_vma) + sizeof(char));
1330 local_got_refcounts = bfd_zalloc (abfd, size);
1331 if (local_got_refcounts == NULL)
1333 elf_local_got_refcounts (abfd) = local_got_refcounts;
1334 elf_i386_local_tlsdesc_gotent (abfd)
1335 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1336 elf_i386_local_got_tls_type (abfd)
1337 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1339 local_got_refcounts[r_symndx] += 1;
1340 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1343 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1344 tls_type |= old_tls_type;
1345 /* If a TLS symbol is accessed using IE at least once,
1346 there is no point to use dynamic model for it. */
1347 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1348 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1349 || (tls_type & GOT_TLS_IE) == 0))
1351 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1352 tls_type = old_tls_type;
1353 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1354 && GOT_TLS_GD_ANY_P (tls_type))
1355 tls_type |= old_tls_type;
1358 (*_bfd_error_handler)
1359 (_("%B: `%s' accessed both as normal and "
1360 "thread local symbol"),
1362 h ? h->root.root.string : "<local>");
1367 if (old_tls_type != tls_type)
1370 elf_i386_hash_entry (h)->tls_type = tls_type;
1372 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1380 if (htab->sgot == NULL)
1382 if (htab->elf.dynobj == NULL)
1383 htab->elf.dynobj = abfd;
1384 if (!create_got_section (htab->elf.dynobj, info))
1387 if (r_type != R_386_TLS_IE)
1391 case R_386_TLS_LE_32:
1395 info->flags |= DF_STATIC_TLS;
1400 if (h != NULL && !info->shared)
1402 /* If this reloc is in a read-only section, we might
1403 need a copy reloc. We can't check reliably at this
1404 stage whether the section is read-only, as input
1405 sections have not yet been mapped to output sections.
1406 Tentatively set the flag for now, and correct in
1407 adjust_dynamic_symbol. */
1410 /* We may need a .plt entry if the function this reloc
1411 refers to is in a shared lib. */
1412 h->plt.refcount += 1;
1413 if (r_type != R_386_PC32)
1414 h->pointer_equality_needed = 1;
1417 /* If we are creating a shared library, and this is a reloc
1418 against a global symbol, or a non PC relative reloc
1419 against a local symbol, then we need to copy the reloc
1420 into the shared library. However, if we are linking with
1421 -Bsymbolic, we do not need to copy a reloc against a
1422 global symbol which is defined in an object we are
1423 including in the link (i.e., DEF_REGULAR is set). At
1424 this point we have not seen all the input files, so it is
1425 possible that DEF_REGULAR is not set now but will be set
1426 later (it is never cleared). In case of a weak definition,
1427 DEF_REGULAR may be cleared later by a strong definition in
1428 a shared library. We account for that possibility below by
1429 storing information in the relocs_copied field of the hash
1430 table entry. A similar situation occurs when creating
1431 shared libraries and symbol visibility changes render the
1434 If on the other hand, we are creating an executable, we
1435 may need to keep relocations for symbols satisfied by a
1436 dynamic library if we manage to avoid copy relocs for the
1439 && (sec->flags & SEC_ALLOC) != 0
1440 && (r_type != R_386_PC32
1442 && (! SYMBOLIC_BIND (info, h)
1443 || h->root.type == bfd_link_hash_defweak
1444 || !h->def_regular))))
1445 || (ELIMINATE_COPY_RELOCS
1447 && (sec->flags & SEC_ALLOC) != 0
1449 && (h->root.type == bfd_link_hash_defweak
1450 || !h->def_regular)))
1452 struct elf_i386_dyn_relocs *p;
1453 struct elf_i386_dyn_relocs **head;
1455 /* We must copy these reloc types into the output file.
1456 Create a reloc section in dynobj and make room for
1462 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1463 unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
1465 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
1469 if (! CONST_STRNEQ (name, ".rel")
1470 || strcmp (bfd_get_section_name (abfd, sec),
1473 (*_bfd_error_handler)
1474 (_("%B: bad relocation section name `%s\'"),
1478 if (htab->elf.dynobj == NULL)
1479 htab->elf.dynobj = abfd;
1481 dynobj = htab->elf.dynobj;
1482 sreloc = bfd_get_section_by_name (dynobj, name);
1487 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1488 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1489 if ((sec->flags & SEC_ALLOC) != 0)
1490 flags |= SEC_ALLOC | SEC_LOAD;
1491 sreloc = bfd_make_section_with_flags (dynobj,
1495 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1498 elf_section_data (sec)->sreloc = sreloc;
1501 /* If this is a global symbol, we count the number of
1502 relocations we need for this symbol. */
1505 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1510 /* Track dynamic relocs needed for local syms too.
1511 We really need local syms available to do this
1515 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1520 vpp = &elf_section_data (s)->local_dynrel;
1521 head = (struct elf_i386_dyn_relocs **)vpp;
1525 if (p == NULL || p->sec != sec)
1527 bfd_size_type amt = sizeof *p;
1528 p = bfd_alloc (htab->elf.dynobj, amt);
1539 if (r_type == R_386_PC32)
1544 /* This relocation describes the C++ object vtable hierarchy.
1545 Reconstruct it for later use during GC. */
1546 case R_386_GNU_VTINHERIT:
1547 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1551 /* This relocation describes which C++ vtable entries are actually
1552 used. Record for later use during GC. */
1553 case R_386_GNU_VTENTRY:
1554 BFD_ASSERT (h != NULL);
1556 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1568 /* Return the section that should be marked against GC for a given
1572 elf_i386_gc_mark_hook (asection *sec,
1573 struct bfd_link_info *info,
1574 Elf_Internal_Rela *rel,
1575 struct elf_link_hash_entry *h,
1576 Elf_Internal_Sym *sym)
1579 switch (ELF32_R_TYPE (rel->r_info))
1581 case R_386_GNU_VTINHERIT:
1582 case R_386_GNU_VTENTRY:
1586 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1589 /* Update the got entry reference counts for the section being removed. */
1592 elf_i386_gc_sweep_hook (bfd *abfd,
1593 struct bfd_link_info *info,
1595 const Elf_Internal_Rela *relocs)
1597 Elf_Internal_Shdr *symtab_hdr;
1598 struct elf_link_hash_entry **sym_hashes;
1599 bfd_signed_vma *local_got_refcounts;
1600 const Elf_Internal_Rela *rel, *relend;
1602 elf_section_data (sec)->local_dynrel = NULL;
1604 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1605 sym_hashes = elf_sym_hashes (abfd);
1606 local_got_refcounts = elf_local_got_refcounts (abfd);
1608 relend = relocs + sec->reloc_count;
1609 for (rel = relocs; rel < relend; rel++)
1611 unsigned long r_symndx;
1612 unsigned int r_type;
1613 struct elf_link_hash_entry *h = NULL;
1615 r_symndx = ELF32_R_SYM (rel->r_info);
1616 if (r_symndx >= symtab_hdr->sh_info)
1618 struct elf_i386_link_hash_entry *eh;
1619 struct elf_i386_dyn_relocs **pp;
1620 struct elf_i386_dyn_relocs *p;
1622 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1623 while (h->root.type == bfd_link_hash_indirect
1624 || h->root.type == bfd_link_hash_warning)
1625 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1626 eh = (struct elf_i386_link_hash_entry *) h;
1628 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1631 /* Everything must go for SEC. */
1637 r_type = ELF32_R_TYPE (rel->r_info);
1638 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1639 symtab_hdr, sym_hashes,
1640 &r_type, GOT_UNKNOWN,
1647 if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1648 elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1652 case R_386_TLS_GOTDESC:
1653 case R_386_TLS_DESC_CALL:
1654 case R_386_TLS_IE_32:
1656 case R_386_TLS_GOTIE:
1660 if (h->got.refcount > 0)
1661 h->got.refcount -= 1;
1663 else if (local_got_refcounts != NULL)
1665 if (local_got_refcounts[r_symndx] > 0)
1666 local_got_refcounts[r_symndx] -= 1;
1679 if (h->plt.refcount > 0)
1680 h->plt.refcount -= 1;
1692 /* Adjust a symbol defined by a dynamic object and referenced by a
1693 regular object. The current definition is in some section of the
1694 dynamic object, but we're not including those sections. We have to
1695 change the definition to something the rest of the link can
1699 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1700 struct elf_link_hash_entry *h)
1702 struct elf_i386_link_hash_table *htab;
1705 /* If this is a function, put it in the procedure linkage table. We
1706 will fill in the contents of the procedure linkage table later,
1707 when we know the address of the .got section. */
1708 if (h->type == STT_FUNC
1711 if (h->plt.refcount <= 0
1712 || SYMBOL_CALLS_LOCAL (info, h)
1713 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1714 && h->root.type == bfd_link_hash_undefweak))
1716 /* This case can occur if we saw a PLT32 reloc in an input
1717 file, but the symbol was never referred to by a dynamic
1718 object, or if all references were garbage collected. In
1719 such a case, we don't actually need to build a procedure
1720 linkage table, and we can just do a PC32 reloc instead. */
1721 h->plt.offset = (bfd_vma) -1;
1728 /* It's possible that we incorrectly decided a .plt reloc was
1729 needed for an R_386_PC32 reloc to a non-function sym in
1730 check_relocs. We can't decide accurately between function and
1731 non-function syms in check-relocs; Objects loaded later in
1732 the link may change h->type. So fix it now. */
1733 h->plt.offset = (bfd_vma) -1;
1735 /* If this is a weak symbol, and there is a real definition, the
1736 processor independent code will have arranged for us to see the
1737 real definition first, and we can just use the same value. */
1738 if (h->u.weakdef != NULL)
1740 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1741 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1742 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1743 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1744 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1745 h->non_got_ref = h->u.weakdef->non_got_ref;
1749 /* This is a reference to a symbol defined by a dynamic object which
1750 is not a function. */
1752 /* If we are creating a shared library, we must presume that the
1753 only references to the symbol are via the global offset table.
1754 For such cases we need not do anything here; the relocations will
1755 be handled correctly by relocate_section. */
1759 /* If there are no references to this symbol that do not use the
1760 GOT, we don't need to generate a copy reloc. */
1761 if (!h->non_got_ref)
1764 /* If -z nocopyreloc was given, we won't generate them either. */
1765 if (info->nocopyreloc)
1771 htab = elf_i386_hash_table (info);
1773 /* If there aren't any dynamic relocs in read-only sections, then
1774 we can keep the dynamic relocs and avoid the copy reloc. This
1775 doesn't work on VxWorks, where we can not have dynamic relocations
1776 (other than copy and jump slot relocations) in an executable. */
1777 if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
1779 struct elf_i386_link_hash_entry * eh;
1780 struct elf_i386_dyn_relocs *p;
1782 eh = (struct elf_i386_link_hash_entry *) h;
1783 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1785 s = p->sec->output_section;
1786 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1799 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1800 h->root.root.string);
1804 /* We must allocate the symbol in our .dynbss section, which will
1805 become part of the .bss section of the executable. There will be
1806 an entry for this symbol in the .dynsym section. The dynamic
1807 object will contain position independent code, so all references
1808 from the dynamic object to this symbol will go through the global
1809 offset table. The dynamic linker will use the .dynsym entry to
1810 determine the address it must put in the global offset table, so
1811 both the dynamic object and the regular object will refer to the
1812 same memory location for the variable. */
1814 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1815 copy the initial value out of the dynamic object and into the
1816 runtime process image. */
1817 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1819 htab->srelbss->size += sizeof (Elf32_External_Rel);
1825 return _bfd_elf_adjust_dynamic_copy (h, s);
1828 /* Allocate space in .plt, .got and associated reloc sections for
1832 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1834 struct bfd_link_info *info;
1835 struct elf_i386_link_hash_table *htab;
1836 struct elf_i386_link_hash_entry *eh;
1837 struct elf_i386_dyn_relocs *p;
1839 if (h->root.type == bfd_link_hash_indirect)
1842 if (h->root.type == bfd_link_hash_warning)
1843 /* When warning symbols are created, they **replace** the "real"
1844 entry in the hash table, thus we never get to see the real
1845 symbol in a hash traversal. So look at it now. */
1846 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1848 info = (struct bfd_link_info *) inf;
1849 htab = elf_i386_hash_table (info);
1851 if (htab->elf.dynamic_sections_created
1852 && h->plt.refcount > 0)
1854 /* Make sure this symbol is output as a dynamic symbol.
1855 Undefined weak syms won't yet be marked as dynamic. */
1856 if (h->dynindx == -1
1857 && !h->forced_local)
1859 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1864 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1866 asection *s = htab->splt;
1868 /* If this is the first .plt entry, make room for the special
1871 s->size += PLT_ENTRY_SIZE;
1873 h->plt.offset = s->size;
1875 /* If this symbol is not defined in a regular file, and we are
1876 not generating a shared library, then set the symbol to this
1877 location in the .plt. This is required to make function
1878 pointers compare as equal between the normal executable and
1879 the shared library. */
1883 h->root.u.def.section = s;
1884 h->root.u.def.value = h->plt.offset;
1887 /* Make room for this entry. */
1888 s->size += PLT_ENTRY_SIZE;
1890 /* We also need to make an entry in the .got.plt section, which
1891 will be placed in the .got section by the linker script. */
1892 htab->sgotplt->size += 4;
1894 /* We also need to make an entry in the .rel.plt section. */
1895 htab->srelplt->size += sizeof (Elf32_External_Rel);
1896 htab->next_tls_desc_index++;
1898 if (htab->is_vxworks && !info->shared)
1900 /* VxWorks has a second set of relocations for each PLT entry
1901 in executables. They go in a separate relocation section,
1902 which is processed by the kernel loader. */
1904 /* There are two relocations for the initial PLT entry: an
1905 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1906 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1908 if (h->plt.offset == PLT_ENTRY_SIZE)
1909 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1911 /* There are two extra relocations for each subsequent PLT entry:
1912 an R_386_32 relocation for the GOT entry, and an R_386_32
1913 relocation for the PLT entry. */
1915 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1920 h->plt.offset = (bfd_vma) -1;
1926 h->plt.offset = (bfd_vma) -1;
1930 eh = (struct elf_i386_link_hash_entry *) h;
1931 eh->tlsdesc_got = (bfd_vma) -1;
1933 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1934 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1935 if (h->got.refcount > 0
1938 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
1939 h->got.offset = (bfd_vma) -1;
1940 else if (h->got.refcount > 0)
1944 int tls_type = elf_i386_hash_entry(h)->tls_type;
1946 /* Make sure this symbol is output as a dynamic symbol.
1947 Undefined weak syms won't yet be marked as dynamic. */
1948 if (h->dynindx == -1
1949 && !h->forced_local)
1951 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1956 if (GOT_TLS_GDESC_P (tls_type))
1958 eh->tlsdesc_got = htab->sgotplt->size
1959 - elf_i386_compute_jump_table_size (htab);
1960 htab->sgotplt->size += 8;
1961 h->got.offset = (bfd_vma) -2;
1963 if (! GOT_TLS_GDESC_P (tls_type)
1964 || GOT_TLS_GD_P (tls_type))
1966 h->got.offset = s->size;
1968 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1969 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
1972 dyn = htab->elf.dynamic_sections_created;
1973 /* R_386_TLS_IE_32 needs one dynamic relocation,
1974 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1975 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1976 need two), R_386_TLS_GD needs one if local symbol and two if
1978 if (tls_type == GOT_TLS_IE_BOTH)
1979 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
1980 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
1981 || (tls_type & GOT_TLS_IE))
1982 htab->srelgot->size += sizeof (Elf32_External_Rel);
1983 else if (GOT_TLS_GD_P (tls_type))
1984 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
1985 else if (! GOT_TLS_GDESC_P (tls_type)
1986 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1987 || h->root.type != bfd_link_hash_undefweak)
1989 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1990 htab->srelgot->size += sizeof (Elf32_External_Rel);
1991 if (GOT_TLS_GDESC_P (tls_type))
1992 htab->srelplt->size += sizeof (Elf32_External_Rel);
1995 h->got.offset = (bfd_vma) -1;
1997 if (eh->dyn_relocs == NULL)
2000 /* In the shared -Bsymbolic case, discard space allocated for
2001 dynamic pc-relative relocs against symbols which turn out to be
2002 defined in regular objects. For the normal shared case, discard
2003 space for pc-relative relocs that have become local due to symbol
2004 visibility changes. */
2008 /* The only reloc that uses pc_count is R_386_PC32, which will
2009 appear on a call or on something like ".long foo - .". We
2010 want calls to protected symbols to resolve directly to the
2011 function rather than going via the plt. If people want
2012 function pointer comparisons to work as expected then they
2013 should avoid writing assembly like ".long foo - .". */
2014 if (SYMBOL_CALLS_LOCAL (info, h))
2016 struct elf_i386_dyn_relocs **pp;
2018 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2020 p->count -= p->pc_count;
2029 /* Also discard relocs on undefined weak syms with non-default
2031 if (eh->dyn_relocs != NULL
2032 && h->root.type == bfd_link_hash_undefweak)
2034 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2035 eh->dyn_relocs = NULL;
2037 /* Make sure undefined weak symbols are output as a dynamic
2039 else if (h->dynindx == -1
2040 && !h->forced_local)
2042 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2047 else if (ELIMINATE_COPY_RELOCS)
2049 /* For the non-shared case, discard space for relocs against
2050 symbols which turn out to need copy relocs or are not
2056 || (htab->elf.dynamic_sections_created
2057 && (h->root.type == bfd_link_hash_undefweak
2058 || h->root.type == bfd_link_hash_undefined))))
2060 /* Make sure this symbol is output as a dynamic symbol.
2061 Undefined weak syms won't yet be marked as dynamic. */
2062 if (h->dynindx == -1
2063 && !h->forced_local)
2065 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2069 /* If that succeeded, we know we'll be keeping all the
2071 if (h->dynindx != -1)
2075 eh->dyn_relocs = NULL;
2080 /* Finally, allocate space. */
2081 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2083 asection *sreloc = elf_section_data (p->sec)->sreloc;
2084 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2090 /* Find any dynamic relocs that apply to read-only sections. */
2093 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2095 struct elf_i386_link_hash_entry *eh;
2096 struct elf_i386_dyn_relocs *p;
2098 if (h->root.type == bfd_link_hash_warning)
2099 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2101 eh = (struct elf_i386_link_hash_entry *) h;
2102 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2104 asection *s = p->sec->output_section;
2106 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2108 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2110 info->flags |= DF_TEXTREL;
2112 /* Not an error, just cut short the traversal. */
2119 /* Set the sizes of the dynamic sections. */
2122 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2123 struct bfd_link_info *info)
2125 struct elf_i386_link_hash_table *htab;
2131 htab = elf_i386_hash_table (info);
2132 dynobj = htab->elf.dynobj;
2136 if (htab->elf.dynamic_sections_created)
2138 /* Set the contents of the .interp section to the interpreter. */
2139 if (info->executable)
2141 s = bfd_get_section_by_name (dynobj, ".interp");
2144 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2145 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2149 /* Set up .got offsets for local syms, and space for local dynamic
2151 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2153 bfd_signed_vma *local_got;
2154 bfd_signed_vma *end_local_got;
2155 char *local_tls_type;
2156 bfd_vma *local_tlsdesc_gotent;
2157 bfd_size_type locsymcount;
2158 Elf_Internal_Shdr *symtab_hdr;
2161 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2164 for (s = ibfd->sections; s != NULL; s = s->next)
2166 struct elf_i386_dyn_relocs *p;
2168 for (p = ((struct elf_i386_dyn_relocs *)
2169 elf_section_data (s)->local_dynrel);
2173 if (!bfd_is_abs_section (p->sec)
2174 && bfd_is_abs_section (p->sec->output_section))
2176 /* Input section has been discarded, either because
2177 it is a copy of a linkonce section or due to
2178 linker script /DISCARD/, so we'll be discarding
2181 else if (p->count != 0)
2183 srel = elf_section_data (p->sec)->sreloc;
2184 srel->size += p->count * sizeof (Elf32_External_Rel);
2185 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2186 info->flags |= DF_TEXTREL;
2191 local_got = elf_local_got_refcounts (ibfd);
2195 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2196 locsymcount = symtab_hdr->sh_info;
2197 end_local_got = local_got + locsymcount;
2198 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2199 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2201 srel = htab->srelgot;
2202 for (; local_got < end_local_got;
2203 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2205 *local_tlsdesc_gotent = (bfd_vma) -1;
2208 if (GOT_TLS_GDESC_P (*local_tls_type))
2210 *local_tlsdesc_gotent = htab->sgotplt->size
2211 - elf_i386_compute_jump_table_size (htab);
2212 htab->sgotplt->size += 8;
2213 *local_got = (bfd_vma) -2;
2215 if (! GOT_TLS_GDESC_P (*local_tls_type)
2216 || GOT_TLS_GD_P (*local_tls_type))
2218 *local_got = s->size;
2220 if (GOT_TLS_GD_P (*local_tls_type)
2221 || *local_tls_type == GOT_TLS_IE_BOTH)
2225 || GOT_TLS_GD_ANY_P (*local_tls_type)
2226 || (*local_tls_type & GOT_TLS_IE))
2228 if (*local_tls_type == GOT_TLS_IE_BOTH)
2229 srel->size += 2 * sizeof (Elf32_External_Rel);
2230 else if (GOT_TLS_GD_P (*local_tls_type)
2231 || ! GOT_TLS_GDESC_P (*local_tls_type))
2232 srel->size += sizeof (Elf32_External_Rel);
2233 if (GOT_TLS_GDESC_P (*local_tls_type))
2234 htab->srelplt->size += sizeof (Elf32_External_Rel);
2238 *local_got = (bfd_vma) -1;
2242 if (htab->tls_ldm_got.refcount > 0)
2244 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2246 htab->tls_ldm_got.offset = htab->sgot->size;
2247 htab->sgot->size += 8;
2248 htab->srelgot->size += sizeof (Elf32_External_Rel);
2251 htab->tls_ldm_got.offset = -1;
2253 /* Allocate global sym .plt and .got entries, and space for global
2254 sym dynamic relocs. */
2255 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2257 /* For every jump slot reserved in the sgotplt, reloc_count is
2258 incremented. However, when we reserve space for TLS descriptors,
2259 it's not incremented, so in order to compute the space reserved
2260 for them, it suffices to multiply the reloc count by the jump
2263 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2265 /* We now have determined the sizes of the various dynamic sections.
2266 Allocate memory for them. */
2268 for (s = dynobj->sections; s != NULL; s = s->next)
2270 bfd_boolean strip_section = TRUE;
2272 if ((s->flags & SEC_LINKER_CREATED) == 0)
2277 || s == htab->sgotplt
2278 || s == htab->sdynbss)
2280 /* Strip this section if we don't need it; see the
2282 /* We'd like to strip these sections if they aren't needed, but if
2283 we've exported dynamic symbols from them we must leave them.
2284 It's too late to tell BFD to get rid of the symbols. */
2286 if (htab->elf.hplt != NULL)
2287 strip_section = FALSE;
2289 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2291 if (s->size != 0 && s != htab->srelplt && s != htab->srelplt2)
2294 /* We use the reloc_count field as a counter if we need
2295 to copy relocs into the output file. */
2300 /* It's not one of our sections, so don't allocate space. */
2306 /* If we don't need this section, strip it from the
2307 output file. This is mostly to handle .rel.bss and
2308 .rel.plt. We must create both sections in
2309 create_dynamic_sections, because they must be created
2310 before the linker maps input sections to output
2311 sections. The linker does that before
2312 adjust_dynamic_symbol is called, and it is that
2313 function which decides whether anything needs to go
2314 into these sections. */
2316 s->flags |= SEC_EXCLUDE;
2320 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2323 /* Allocate memory for the section contents. We use bfd_zalloc
2324 here in case unused entries are not reclaimed before the
2325 section's contents are written out. This should not happen,
2326 but this way if it does, we get a R_386_NONE reloc instead
2328 s->contents = bfd_zalloc (dynobj, s->size);
2329 if (s->contents == NULL)
2333 if (htab->elf.dynamic_sections_created)
2335 /* Add some entries to the .dynamic section. We fill in the
2336 values later, in elf_i386_finish_dynamic_sections, but we
2337 must add the entries now so that we get the correct size for
2338 the .dynamic section. The DT_DEBUG entry is filled in by the
2339 dynamic linker and used by the debugger. */
2340 #define add_dynamic_entry(TAG, VAL) \
2341 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2343 if (info->executable)
2345 if (!add_dynamic_entry (DT_DEBUG, 0))
2349 if (htab->splt->size != 0)
2351 if (!add_dynamic_entry (DT_PLTGOT, 0)
2352 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2353 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2354 || !add_dynamic_entry (DT_JMPREL, 0))
2360 if (!add_dynamic_entry (DT_REL, 0)
2361 || !add_dynamic_entry (DT_RELSZ, 0)
2362 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2365 /* If any dynamic relocs apply to a read-only section,
2366 then we need a DT_TEXTREL entry. */
2367 if ((info->flags & DF_TEXTREL) == 0)
2368 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2371 if ((info->flags & DF_TEXTREL) != 0)
2373 if (!add_dynamic_entry (DT_TEXTREL, 0))
2378 #undef add_dynamic_entry
2384 elf_i386_always_size_sections (bfd *output_bfd,
2385 struct bfd_link_info *info)
2387 asection *tls_sec = elf_hash_table (info)->tls_sec;
2391 struct elf_link_hash_entry *tlsbase;
2393 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2394 "_TLS_MODULE_BASE_",
2395 FALSE, FALSE, FALSE);
2397 if (tlsbase && tlsbase->type == STT_TLS)
2399 struct bfd_link_hash_entry *bh = NULL;
2400 const struct elf_backend_data *bed
2401 = get_elf_backend_data (output_bfd);
2403 if (!(_bfd_generic_link_add_one_symbol
2404 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2405 tls_sec, 0, NULL, FALSE,
2406 bed->collect, &bh)))
2408 tlsbase = (struct elf_link_hash_entry *)bh;
2409 tlsbase->def_regular = 1;
2410 tlsbase->other = STV_HIDDEN;
2411 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2418 /* Set the correct type for an x86 ELF section. We do this by the
2419 section name, which is a hack, but ought to work. */
2422 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2423 Elf_Internal_Shdr *hdr,
2426 register const char *name;
2428 name = bfd_get_section_name (abfd, sec);
2430 /* This is an ugly, but unfortunately necessary hack that is
2431 needed when producing EFI binaries on x86. It tells
2432 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2433 containing ELF relocation info. We need this hack in order to
2434 be able to generate ELF binaries that can be translated into
2435 EFI applications (which are essentially COFF objects). Those
2436 files contain a COFF ".reloc" section inside an ELFNN object,
2437 which would normally cause BFD to segfault because it would
2438 attempt to interpret this section as containing relocation
2439 entries for section "oc". With this hack enabled, ".reloc"
2440 will be treated as a normal data section, which will avoid the
2441 segfault. However, you won't be able to create an ELFNN binary
2442 with a section named "oc" that needs relocations, but that's
2443 the kind of ugly side-effects you get when detecting section
2444 types based on their names... In practice, this limitation is
2445 unlikely to bite. */
2446 if (strcmp (name, ".reloc") == 0)
2447 hdr->sh_type = SHT_PROGBITS;
2452 /* Return the base VMA address which should be subtracted from real addresses
2453 when resolving @dtpoff relocation.
2454 This is PT_TLS segment p_vaddr. */
2457 dtpoff_base (struct bfd_link_info *info)
2459 /* If tls_sec is NULL, we should have signalled an error already. */
2460 if (elf_hash_table (info)->tls_sec == NULL)
2462 return elf_hash_table (info)->tls_sec->vma;
2465 /* Return the relocation value for @tpoff relocation
2466 if STT_TLS virtual address is ADDRESS. */
2469 tpoff (struct bfd_link_info *info, bfd_vma address)
2471 struct elf_link_hash_table *htab = elf_hash_table (info);
2473 /* If tls_sec is NULL, we should have signalled an error already. */
2474 if (htab->tls_sec == NULL)
2476 return htab->tls_size + htab->tls_sec->vma - address;
2479 /* Relocate an i386 ELF section. */
2482 elf_i386_relocate_section (bfd *output_bfd,
2483 struct bfd_link_info *info,
2485 asection *input_section,
2487 Elf_Internal_Rela *relocs,
2488 Elf_Internal_Sym *local_syms,
2489 asection **local_sections)
2491 struct elf_i386_link_hash_table *htab;
2492 Elf_Internal_Shdr *symtab_hdr;
2493 struct elf_link_hash_entry **sym_hashes;
2494 bfd_vma *local_got_offsets;
2495 bfd_vma *local_tlsdesc_gotents;
2496 Elf_Internal_Rela *rel;
2497 Elf_Internal_Rela *relend;
2499 htab = elf_i386_hash_table (info);
2500 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2501 sym_hashes = elf_sym_hashes (input_bfd);
2502 local_got_offsets = elf_local_got_offsets (input_bfd);
2503 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
2506 relend = relocs + input_section->reloc_count;
2507 for (; rel < relend; rel++)
2509 unsigned int r_type;
2510 reloc_howto_type *howto;
2511 unsigned long r_symndx;
2512 struct elf_link_hash_entry *h;
2513 Elf_Internal_Sym *sym;
2515 bfd_vma off, offplt;
2517 bfd_boolean unresolved_reloc;
2518 bfd_reloc_status_type r;
2522 r_type = ELF32_R_TYPE (rel->r_info);
2523 if (r_type == R_386_GNU_VTINHERIT
2524 || r_type == R_386_GNU_VTENTRY)
2527 if ((indx = r_type) >= R_386_standard
2528 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2529 >= R_386_ext - R_386_standard)
2530 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2531 >= R_386_tls - R_386_ext))
2533 (*_bfd_error_handler)
2534 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2535 input_bfd, input_section, r_type);
2536 bfd_set_error (bfd_error_bad_value);
2539 howto = elf_howto_table + indx;
2541 r_symndx = ELF32_R_SYM (rel->r_info);
2545 unresolved_reloc = FALSE;
2546 if (r_symndx < symtab_hdr->sh_info)
2548 sym = local_syms + r_symndx;
2549 sec = local_sections[r_symndx];
2550 relocation = (sec->output_section->vma
2551 + sec->output_offset
2554 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2555 && ((sec->flags & SEC_MERGE) != 0
2556 || (info->relocatable
2557 && sec->output_offset != 0)))
2560 bfd_byte *where = contents + rel->r_offset;
2562 switch (howto->size)
2565 addend = bfd_get_8 (input_bfd, where);
2566 if (howto->pc_relative)
2568 addend = (addend ^ 0x80) - 0x80;
2573 addend = bfd_get_16 (input_bfd, where);
2574 if (howto->pc_relative)
2576 addend = (addend ^ 0x8000) - 0x8000;
2581 addend = bfd_get_32 (input_bfd, where);
2582 if (howto->pc_relative)
2584 addend = (addend ^ 0x80000000) - 0x80000000;
2592 if (info->relocatable)
2593 addend += sec->output_offset;
2596 asection *msec = sec;
2597 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2599 addend -= relocation;
2600 addend += msec->output_section->vma + msec->output_offset;
2603 switch (howto->size)
2606 /* FIXME: overflow checks. */
2607 if (howto->pc_relative)
2609 bfd_put_8 (input_bfd, addend, where);
2612 if (howto->pc_relative)
2614 bfd_put_16 (input_bfd, addend, where);
2617 if (howto->pc_relative)
2619 bfd_put_32 (input_bfd, addend, where);
2628 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2629 r_symndx, symtab_hdr, sym_hashes,
2631 unresolved_reloc, warned);
2634 if (sec != NULL && elf_discarded_section (sec))
2636 /* For relocs against symbols from removed linkonce sections,
2637 or sections discarded by a linker script, we just want the
2638 section contents zeroed. Avoid any special processing. */
2639 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2645 if (info->relocatable)
2651 /* Relocation is to the entry for this symbol in the global
2653 if (htab->sgot == NULL)
2660 off = h->got.offset;
2661 dyn = htab->elf.dynamic_sections_created;
2662 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2664 && SYMBOL_REFERENCES_LOCAL (info, h))
2665 || (ELF_ST_VISIBILITY (h->other)
2666 && h->root.type == bfd_link_hash_undefweak))
2668 /* This is actually a static link, or it is a
2669 -Bsymbolic link and the symbol is defined
2670 locally, or the symbol was forced to be local
2671 because of a version file. We must initialize
2672 this entry in the global offset table. Since the
2673 offset must always be a multiple of 4, we use the
2674 least significant bit to record whether we have
2675 initialized it already.
2677 When doing a dynamic link, we create a .rel.got
2678 relocation entry to initialize the value. This
2679 is done in the finish_dynamic_symbol routine. */
2684 bfd_put_32 (output_bfd, relocation,
2685 htab->sgot->contents + off);
2690 unresolved_reloc = FALSE;
2694 if (local_got_offsets == NULL)
2697 off = local_got_offsets[r_symndx];
2699 /* The offset must always be a multiple of 4. We use
2700 the least significant bit to record whether we have
2701 already generated the necessary reloc. */
2706 bfd_put_32 (output_bfd, relocation,
2707 htab->sgot->contents + off);
2712 Elf_Internal_Rela outrel;
2719 outrel.r_offset = (htab->sgot->output_section->vma
2720 + htab->sgot->output_offset
2722 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2724 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
2725 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2728 local_got_offsets[r_symndx] |= 1;
2732 if (off >= (bfd_vma) -2)
2735 relocation = htab->sgot->output_section->vma
2736 + htab->sgot->output_offset + off
2737 - htab->sgotplt->output_section->vma
2738 - htab->sgotplt->output_offset;
2742 /* Relocation is relative to the start of the global offset
2745 /* Check to make sure it isn't a protected function symbol
2746 for shared library since it may not be local when used
2747 as function address. */
2749 && !info->executable
2752 && h->type == STT_FUNC
2753 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2755 (*_bfd_error_handler)
2756 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2757 input_bfd, h->root.root.string);
2758 bfd_set_error (bfd_error_bad_value);
2762 /* Note that sgot is not involved in this
2763 calculation. We always want the start of .got.plt. If we
2764 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2765 permitted by the ABI, we might have to change this
2767 relocation -= htab->sgotplt->output_section->vma
2768 + htab->sgotplt->output_offset;
2772 /* Use global offset table as symbol value. */
2773 relocation = htab->sgotplt->output_section->vma
2774 + htab->sgotplt->output_offset;
2775 unresolved_reloc = FALSE;
2779 /* Relocation is to the entry for this symbol in the
2780 procedure linkage table. */
2782 /* Resolve a PLT32 reloc against a local symbol directly,
2783 without using the procedure linkage table. */
2787 if (h->plt.offset == (bfd_vma) -1
2788 || htab->splt == NULL)
2790 /* We didn't make a PLT entry for this symbol. This
2791 happens when statically linking PIC code, or when
2792 using -Bsymbolic. */
2796 relocation = (htab->splt->output_section->vma
2797 + htab->splt->output_offset
2799 unresolved_reloc = FALSE;
2804 if ((input_section->flags & SEC_ALLOC) == 0)
2809 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2810 || h->root.type != bfd_link_hash_undefweak)
2811 && (r_type != R_386_PC32
2812 || !SYMBOL_CALLS_LOCAL (info, h)))
2813 || (ELIMINATE_COPY_RELOCS
2820 || h->root.type == bfd_link_hash_undefweak
2821 || h->root.type == bfd_link_hash_undefined)))
2823 Elf_Internal_Rela outrel;
2825 bfd_boolean skip, relocate;
2828 /* When generating a shared object, these relocations
2829 are copied into the output file to be resolved at run
2836 _bfd_elf_section_offset (output_bfd, info, input_section,
2838 if (outrel.r_offset == (bfd_vma) -1)
2840 else if (outrel.r_offset == (bfd_vma) -2)
2841 skip = TRUE, relocate = TRUE;
2842 outrel.r_offset += (input_section->output_section->vma
2843 + input_section->output_offset);
2846 memset (&outrel, 0, sizeof outrel);
2849 && (r_type == R_386_PC32
2851 || !SYMBOLIC_BIND (info, h)
2852 || !h->def_regular))
2853 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2856 /* This symbol is local, or marked to become local. */
2858 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2861 sreloc = elf_section_data (input_section)->sreloc;
2865 loc = sreloc->contents;
2866 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2867 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2869 /* If this reloc is against an external symbol, we do
2870 not want to fiddle with the addend. Otherwise, we
2871 need to include the symbol value so that it becomes
2872 an addend for the dynamic reloc. */
2881 Elf_Internal_Rela outrel;
2885 outrel.r_offset = rel->r_offset
2886 + input_section->output_section->vma
2887 + input_section->output_offset;
2888 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2889 sreloc = elf_section_data (input_section)->sreloc;
2892 loc = sreloc->contents;
2893 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2894 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2899 case R_386_TLS_GOTDESC:
2900 case R_386_TLS_DESC_CALL:
2901 case R_386_TLS_IE_32:
2902 case R_386_TLS_GOTIE:
2903 tls_type = GOT_UNKNOWN;
2904 if (h == NULL && local_got_offsets)
2905 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
2907 tls_type = elf_i386_hash_entry(h)->tls_type;
2908 if (tls_type == GOT_TLS_IE)
2909 tls_type = GOT_TLS_IE_NEG;
2911 if (! elf_i386_tls_transition (info, input_bfd,
2912 input_section, contents,
2913 symtab_hdr, sym_hashes,
2914 &r_type, tls_type, rel,
2918 if (r_type == R_386_TLS_LE_32)
2920 BFD_ASSERT (! unresolved_reloc);
2921 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
2926 /* GD->LE transition. */
2927 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2930 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2932 movl %gs:0, %eax; subl $foo@tpoff, %eax
2933 (6 byte form of subl). */
2934 memcpy (contents + rel->r_offset - 3,
2935 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2936 roff = rel->r_offset + 5;
2940 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2942 movl %gs:0, %eax; subl $foo@tpoff, %eax
2943 (6 byte form of subl). */
2944 memcpy (contents + rel->r_offset - 2,
2945 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2946 roff = rel->r_offset + 6;
2948 bfd_put_32 (output_bfd, tpoff (info, relocation),
2950 /* Skip R_386_PC32/R_386_PLT32. */
2954 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
2956 /* GDesc -> LE transition.
2957 It's originally something like:
2958 leal x@tlsdesc(%ebx), %eax
2962 Registers other than %eax may be set up here. */
2967 roff = rel->r_offset;
2968 val = bfd_get_8 (input_bfd, contents + roff - 1);
2970 /* Now modify the instruction as appropriate. */
2971 /* aoliva FIXME: remove the above and xor the byte
2973 bfd_put_8 (output_bfd, val ^ 0x86,
2974 contents + roff - 1);
2975 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2979 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
2981 /* GDesc -> LE transition.
2989 roff = rel->r_offset;
2990 bfd_put_8 (output_bfd, 0x66, contents + roff);
2991 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2994 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
2998 /* IE->LE transition:
2999 Originally it can be one of:
3007 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3010 /* movl foo, %eax. */
3011 bfd_put_8 (output_bfd, 0xb8,
3012 contents + rel->r_offset - 1);
3018 type = bfd_get_8 (input_bfd,
3019 contents + rel->r_offset - 2);
3024 bfd_put_8 (output_bfd, 0xc7,
3025 contents + rel->r_offset - 2);
3026 bfd_put_8 (output_bfd,
3027 0xc0 | ((val >> 3) & 7),
3028 contents + rel->r_offset - 1);
3032 bfd_put_8 (output_bfd, 0x81,
3033 contents + rel->r_offset - 2);
3034 bfd_put_8 (output_bfd,
3035 0xc0 | ((val >> 3) & 7),
3036 contents + rel->r_offset - 1);
3043 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3044 contents + rel->r_offset);
3049 unsigned int val, type;
3051 /* {IE_32,GOTIE}->LE transition:
3052 Originally it can be one of:
3053 subl foo(%reg1), %reg2
3054 movl foo(%reg1), %reg2
3055 addl foo(%reg1), %reg2
3058 movl $foo, %reg2 (6 byte form)
3059 addl $foo, %reg2. */
3060 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3061 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3065 bfd_put_8 (output_bfd, 0xc7,
3066 contents + rel->r_offset - 2);
3067 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3068 contents + rel->r_offset - 1);
3070 else if (type == 0x2b)
3073 bfd_put_8 (output_bfd, 0x81,
3074 contents + rel->r_offset - 2);
3075 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3076 contents + rel->r_offset - 1);
3078 else if (type == 0x03)
3081 bfd_put_8 (output_bfd, 0x81,
3082 contents + rel->r_offset - 2);
3083 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3084 contents + rel->r_offset - 1);
3088 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3089 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3090 contents + rel->r_offset);
3092 bfd_put_32 (output_bfd, tpoff (info, relocation),
3093 contents + rel->r_offset);
3098 if (htab->sgot == NULL)
3103 off = h->got.offset;
3104 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
3108 if (local_got_offsets == NULL)
3111 off = local_got_offsets[r_symndx];
3112 offplt = local_tlsdesc_gotents[r_symndx];
3119 Elf_Internal_Rela outrel;
3124 if (htab->srelgot == NULL)
3127 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3129 if (GOT_TLS_GDESC_P (tls_type))
3131 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3132 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3133 <= htab->sgotplt->size);
3134 outrel.r_offset = (htab->sgotplt->output_section->vma
3135 + htab->sgotplt->output_offset
3137 + htab->sgotplt_jump_table_size);
3138 sreloc = htab->srelplt;
3139 loc = sreloc->contents;
3140 loc += (htab->next_tls_desc_index++
3141 * sizeof (Elf32_External_Rel));
3142 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3143 <= sreloc->contents + sreloc->size);
3144 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3147 BFD_ASSERT (! unresolved_reloc);
3148 bfd_put_32 (output_bfd,
3149 relocation - dtpoff_base (info),
3150 htab->sgotplt->contents + offplt
3151 + htab->sgotplt_jump_table_size + 4);
3155 bfd_put_32 (output_bfd, 0,
3156 htab->sgotplt->contents + offplt
3157 + htab->sgotplt_jump_table_size + 4);
3161 sreloc = htab->srelgot;
3163 outrel.r_offset = (htab->sgot->output_section->vma
3164 + htab->sgot->output_offset + off);
3166 if (GOT_TLS_GD_P (tls_type))
3167 dr_type = R_386_TLS_DTPMOD32;
3168 else if (GOT_TLS_GDESC_P (tls_type))
3170 else if (tls_type == GOT_TLS_IE_POS)
3171 dr_type = R_386_TLS_TPOFF;
3173 dr_type = R_386_TLS_TPOFF32;
3175 if (dr_type == R_386_TLS_TPOFF && indx == 0)
3176 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3177 htab->sgot->contents + off);
3178 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3179 bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
3180 htab->sgot->contents + off);
3181 else if (dr_type != R_386_TLS_DESC)
3182 bfd_put_32 (output_bfd, 0,
3183 htab->sgot->contents + off);
3184 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3186 loc = sreloc->contents;
3187 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3188 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3189 <= sreloc->contents + sreloc->size);
3190 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3192 if (GOT_TLS_GD_P (tls_type))
3196 BFD_ASSERT (! unresolved_reloc);
3197 bfd_put_32 (output_bfd,
3198 relocation - dtpoff_base (info),
3199 htab->sgot->contents + off + 4);
3203 bfd_put_32 (output_bfd, 0,
3204 htab->sgot->contents + off + 4);
3205 outrel.r_info = ELF32_R_INFO (indx,
3206 R_386_TLS_DTPOFF32);
3207 outrel.r_offset += 4;
3208 sreloc->reloc_count++;
3209 loc += sizeof (Elf32_External_Rel);
3210 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3211 <= sreloc->contents + sreloc->size);
3212 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3215 else if (tls_type == GOT_TLS_IE_BOTH)
3217 bfd_put_32 (output_bfd,
3218 indx == 0 ? relocation - dtpoff_base (info) : 0,
3219 htab->sgot->contents + off + 4);
3220 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3221 outrel.r_offset += 4;
3222 sreloc->reloc_count++;
3223 loc += sizeof (Elf32_External_Rel);
3224 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3231 local_got_offsets[r_symndx] |= 1;
3234 if (off >= (bfd_vma) -2
3235 && ! GOT_TLS_GDESC_P (tls_type))
3237 if (r_type == R_386_TLS_GOTDESC
3238 || r_type == R_386_TLS_DESC_CALL)
3240 relocation = htab->sgotplt_jump_table_size + offplt;
3241 unresolved_reloc = FALSE;
3243 else if (r_type == ELF32_R_TYPE (rel->r_info))
3245 bfd_vma g_o_t = htab->sgotplt->output_section->vma
3246 + htab->sgotplt->output_offset;
3247 relocation = htab->sgot->output_section->vma
3248 + htab->sgot->output_offset + off - g_o_t;
3249 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3250 && tls_type == GOT_TLS_IE_BOTH)
3252 if (r_type == R_386_TLS_IE)
3253 relocation += g_o_t;
3254 unresolved_reloc = FALSE;
3256 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3258 unsigned int val, type;
3261 /* GD->IE transition. */
3262 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3263 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3266 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3268 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3270 roff = rel->r_offset - 3;
3274 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3276 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3277 roff = rel->r_offset - 2;
3279 memcpy (contents + roff,
3280 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3281 contents[roff + 7] = 0x80 | (val & 7);
3282 /* If foo is used only with foo@gotntpoff(%reg) and
3283 foo@indntpoff, but not with foo@gottpoff(%reg), change
3284 subl $foo@gottpoff(%reg), %eax
3286 addl $foo@gotntpoff(%reg), %eax. */
3287 if (tls_type == GOT_TLS_IE_POS)
3288 contents[roff + 6] = 0x03;
3289 bfd_put_32 (output_bfd,
3290 htab->sgot->output_section->vma
3291 + htab->sgot->output_offset + off
3292 - htab->sgotplt->output_section->vma
3293 - htab->sgotplt->output_offset,
3294 contents + roff + 8);
3295 /* Skip R_386_PLT32. */
3299 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3301 /* GDesc -> IE transition.
3302 It's originally something like:
3303 leal x@tlsdesc(%ebx), %eax
3306 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3308 movl x@gottpoff(%ebx), %eax # before negl %eax
3310 Registers other than %eax may be set up here. */
3314 /* First, make sure it's a leal adding ebx to a 32-bit
3315 offset into any register, although it's probably
3316 almost always going to be eax. */
3317 roff = rel->r_offset;
3319 /* Now modify the instruction as appropriate. */
3320 /* To turn a leal into a movl in the form we use it, it
3321 suffices to change the first byte from 0x8d to 0x8b.
3322 aoliva FIXME: should we decide to keep the leal, all
3323 we have to do is remove the statement below, and
3324 adjust the relaxation of R_386_TLS_DESC_CALL. */
3325 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3327 if (tls_type == GOT_TLS_IE_BOTH)
3330 bfd_put_32 (output_bfd,
3331 htab->sgot->output_section->vma
3332 + htab->sgot->output_offset + off
3333 - htab->sgotplt->output_section->vma
3334 - htab->sgotplt->output_offset,
3338 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3340 /* GDesc -> IE transition.
3348 depending on how we transformed the TLS_GOTDESC above.
3353 roff = rel->r_offset;
3355 /* Now modify the instruction as appropriate. */
3356 if (tls_type != GOT_TLS_IE_NEG)
3359 bfd_put_8 (output_bfd, 0x66, contents + roff);
3360 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3365 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3366 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3376 if (! elf_i386_tls_transition (info, input_bfd,
3377 input_section, contents,
3378 symtab_hdr, sym_hashes,
3379 &r_type, GOT_UNKNOWN, rel,
3383 if (r_type != R_386_TLS_LDM)
3385 /* LD->LE transition:
3386 leal foo(%reg), %eax; call ___tls_get_addr.
3388 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3389 BFD_ASSERT (r_type == R_386_TLS_LE_32);
3390 memcpy (contents + rel->r_offset - 2,
3391 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3392 /* Skip R_386_PC32/R_386_PLT32. */
3397 if (htab->sgot == NULL)
3400 off = htab->tls_ldm_got.offset;
3405 Elf_Internal_Rela outrel;
3408 if (htab->srelgot == NULL)
3411 outrel.r_offset = (htab->sgot->output_section->vma
3412 + htab->sgot->output_offset + off);
3414 bfd_put_32 (output_bfd, 0,
3415 htab->sgot->contents + off);
3416 bfd_put_32 (output_bfd, 0,
3417 htab->sgot->contents + off + 4);
3418 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3419 loc = htab->srelgot->contents;
3420 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3421 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3422 htab->tls_ldm_got.offset |= 1;
3424 relocation = htab->sgot->output_section->vma
3425 + htab->sgot->output_offset + off
3426 - htab->sgotplt->output_section->vma
3427 - htab->sgotplt->output_offset;
3428 unresolved_reloc = FALSE;
3431 case R_386_TLS_LDO_32:
3432 if (info->shared || (input_section->flags & SEC_CODE) == 0)
3433 relocation -= dtpoff_base (info);
3435 /* When converting LDO to LE, we must negate. */
3436 relocation = -tpoff (info, relocation);
3439 case R_386_TLS_LE_32:
3443 Elf_Internal_Rela outrel;
3448 outrel.r_offset = rel->r_offset
3449 + input_section->output_section->vma
3450 + input_section->output_offset;
3451 if (h != NULL && h->dynindx != -1)
3455 if (r_type == R_386_TLS_LE_32)
3456 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3458 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3459 sreloc = elf_section_data (input_section)->sreloc;
3462 loc = sreloc->contents;
3463 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3464 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3467 else if (r_type == R_386_TLS_LE_32)
3468 relocation = dtpoff_base (info) - relocation;
3470 relocation -= dtpoff_base (info);
3472 else if (r_type == R_386_TLS_LE_32)
3473 relocation = tpoff (info, relocation);
3475 relocation = -tpoff (info, relocation);
3482 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3483 because such sections are not SEC_ALLOC and thus ld.so will
3484 not process them. */
3485 if (unresolved_reloc
3486 && !((input_section->flags & SEC_DEBUGGING) != 0
3489 (*_bfd_error_handler)
3490 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3493 (long) rel->r_offset,
3495 h->root.root.string);
3499 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3500 contents, rel->r_offset,
3503 if (r != bfd_reloc_ok)
3508 name = h->root.root.string;
3511 name = bfd_elf_string_from_elf_section (input_bfd,
3512 symtab_hdr->sh_link,
3517 name = bfd_section_name (input_bfd, sec);
3520 if (r == bfd_reloc_overflow)
3522 if (! ((*info->callbacks->reloc_overflow)
3523 (info, (h ? &h->root : NULL), name, howto->name,
3524 (bfd_vma) 0, input_bfd, input_section,
3530 (*_bfd_error_handler)
3531 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3532 input_bfd, input_section,
3533 (long) rel->r_offset, name, (int) r);
3542 /* Finish up dynamic symbol handling. We set the contents of various
3543 dynamic sections here. */
3546 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3547 struct bfd_link_info *info,
3548 struct elf_link_hash_entry *h,
3549 Elf_Internal_Sym *sym)
3551 struct elf_i386_link_hash_table *htab;
3553 htab = elf_i386_hash_table (info);
3555 if (h->plt.offset != (bfd_vma) -1)
3559 Elf_Internal_Rela rel;
3562 /* This symbol has an entry in the procedure linkage table. Set
3565 if (h->dynindx == -1
3566 || htab->splt == NULL
3567 || htab->sgotplt == NULL
3568 || htab->srelplt == NULL)
3571 /* Get the index in the procedure linkage table which
3572 corresponds to this symbol. This is the index of this symbol
3573 in all the symbols for which we are making plt entries. The
3574 first entry in the procedure linkage table is reserved. */
3575 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3577 /* Get the offset into the .got table of the entry that
3578 corresponds to this function. Each .got entry is 4 bytes.
3579 The first three are reserved. */
3580 got_offset = (plt_index + 3) * 4;
3582 /* Fill in the entry in the procedure linkage table. */
3585 memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
3587 bfd_put_32 (output_bfd,
3588 (htab->sgotplt->output_section->vma
3589 + htab->sgotplt->output_offset
3591 htab->splt->contents + h->plt.offset + 2);
3593 if (htab->is_vxworks)
3595 int s, k, reloc_index;
3597 /* Create the R_386_32 relocation referencing the GOT
3598 for this PLT entry. */
3600 /* S: Current slot number (zero-based). */
3601 s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3602 /* K: Number of relocations for PLTResolve. */
3604 k = PLTRESOLVE_RELOCS_SHLIB;
3606 k = PLTRESOLVE_RELOCS;
3607 /* Skip the PLTresolve relocations, and the relocations for
3608 the other PLT slots. */
3609 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3610 loc = (htab->srelplt2->contents + reloc_index
3611 * sizeof (Elf32_External_Rel));
3613 rel.r_offset = (htab->splt->output_section->vma
3614 + htab->splt->output_offset
3615 + h->plt.offset + 2),
3616 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3617 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3619 /* Create the R_386_32 relocation referencing the beginning of
3620 the PLT for this GOT entry. */
3621 rel.r_offset = (htab->sgotplt->output_section->vma
3622 + htab->sgotplt->output_offset
3624 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
3625 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3626 loc + sizeof (Elf32_External_Rel));
3631 memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
3633 bfd_put_32 (output_bfd, got_offset,
3634 htab->splt->contents + h->plt.offset + 2);
3637 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
3638 htab->splt->contents + h->plt.offset + 7);
3639 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
3640 htab->splt->contents + h->plt.offset + 12);
3642 /* Fill in the entry in the global offset table. */
3643 bfd_put_32 (output_bfd,
3644 (htab->splt->output_section->vma
3645 + htab->splt->output_offset
3648 htab->sgotplt->contents + got_offset);
3650 /* Fill in the entry in the .rel.plt section. */
3651 rel.r_offset = (htab->sgotplt->output_section->vma
3652 + htab->sgotplt->output_offset
3654 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3655 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
3656 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3658 if (!h->def_regular)
3660 /* Mark the symbol as undefined, rather than as defined in
3661 the .plt section. Leave the value if there were any
3662 relocations where pointer equality matters (this is a clue
3663 for the dynamic linker, to make function pointer
3664 comparisons work between an application and shared
3665 library), otherwise set it to zero. If a function is only
3666 called from a binary, there is no need to slow down
3667 shared libraries because of that. */
3668 sym->st_shndx = SHN_UNDEF;
3669 if (!h->pointer_equality_needed)
3674 if (h->got.offset != (bfd_vma) -1
3675 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
3676 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
3678 Elf_Internal_Rela rel;
3681 /* This symbol has an entry in the global offset table. Set it
3684 if (htab->sgot == NULL || htab->srelgot == NULL)
3687 rel.r_offset = (htab->sgot->output_section->vma
3688 + htab->sgot->output_offset
3689 + (h->got.offset & ~(bfd_vma) 1));
3691 /* If this is a static link, or it is a -Bsymbolic link and the
3692 symbol is defined locally or was forced to be local because
3693 of a version file, we just want to emit a RELATIVE reloc.
3694 The entry in the global offset table will already have been
3695 initialized in the relocate_section function. */
3697 && SYMBOL_REFERENCES_LOCAL (info, h))
3699 BFD_ASSERT((h->got.offset & 1) != 0);
3700 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3704 BFD_ASSERT((h->got.offset & 1) == 0);
3705 bfd_put_32 (output_bfd, (bfd_vma) 0,
3706 htab->sgot->contents + h->got.offset);
3707 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3710 loc = htab->srelgot->contents;
3711 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3712 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3717 Elf_Internal_Rela rel;
3720 /* This symbol needs a copy reloc. Set it up. */
3722 if (h->dynindx == -1
3723 || (h->root.type != bfd_link_hash_defined
3724 && h->root.type != bfd_link_hash_defweak)
3725 || htab->srelbss == NULL)
3728 rel.r_offset = (h->root.u.def.value
3729 + h->root.u.def.section->output_section->vma
3730 + h->root.u.def.section->output_offset);
3731 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3732 loc = htab->srelbss->contents;
3733 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
3734 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3737 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3738 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3739 is relative to the ".got" section. */
3740 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3741 || (!htab->is_vxworks && h == htab->elf.hgot))
3742 sym->st_shndx = SHN_ABS;
3747 /* Used to decide how to sort relocs in an optimal manner for the
3748 dynamic linker, before writing them out. */
3750 static enum elf_reloc_type_class
3751 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
3753 switch (ELF32_R_TYPE (rela->r_info))
3755 case R_386_RELATIVE:
3756 return reloc_class_relative;
3757 case R_386_JUMP_SLOT:
3758 return reloc_class_plt;
3760 return reloc_class_copy;
3762 return reloc_class_normal;
3766 /* Finish up the dynamic sections. */
3769 elf_i386_finish_dynamic_sections (bfd *output_bfd,
3770 struct bfd_link_info *info)
3772 struct elf_i386_link_hash_table *htab;
3776 htab = elf_i386_hash_table (info);
3777 dynobj = htab->elf.dynobj;
3778 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3780 if (htab->elf.dynamic_sections_created)
3782 Elf32_External_Dyn *dyncon, *dynconend;
3784 if (sdyn == NULL || htab->sgot == NULL)
3787 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3788 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3789 for (; dyncon < dynconend; dyncon++)
3791 Elf_Internal_Dyn dyn;
3794 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3803 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3808 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3813 dyn.d_un.d_val = s->size;
3817 /* My reading of the SVR4 ABI indicates that the
3818 procedure linkage table relocs (DT_JMPREL) should be
3819 included in the overall relocs (DT_REL). This is
3820 what Solaris does. However, UnixWare can not handle
3821 that case. Therefore, we override the DT_RELSZ entry
3822 here to make it not include the JMPREL relocs. */
3826 dyn.d_un.d_val -= s->size;
3830 /* We may not be using the standard ELF linker script.
3831 If .rel.plt is the first .rel section, we adjust
3832 DT_REL to not include it. */
3836 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
3838 dyn.d_un.d_ptr += s->size;
3842 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3845 /* Fill in the first entry in the procedure linkage table. */
3846 if (htab->splt && htab->splt->size > 0)
3850 memcpy (htab->splt->contents, elf_i386_pic_plt0_entry,
3851 sizeof (elf_i386_pic_plt0_entry));
3852 memset (htab->splt->contents + sizeof (elf_i386_pic_plt0_entry),
3853 htab->plt0_pad_byte,
3854 PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
3858 memcpy (htab->splt->contents, elf_i386_plt0_entry,
3859 sizeof(elf_i386_plt0_entry));
3860 memset (htab->splt->contents + sizeof (elf_i386_plt0_entry),
3861 htab->plt0_pad_byte,
3862 PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
3863 bfd_put_32 (output_bfd,
3864 (htab->sgotplt->output_section->vma
3865 + htab->sgotplt->output_offset
3867 htab->splt->contents + 2);
3868 bfd_put_32 (output_bfd,
3869 (htab->sgotplt->output_section->vma
3870 + htab->sgotplt->output_offset
3872 htab->splt->contents + 8);
3874 if (htab->is_vxworks)
3876 Elf_Internal_Rela rel;
3878 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3879 On IA32 we use REL relocations so the addend goes in
3880 the PLT directly. */
3881 rel.r_offset = (htab->splt->output_section->vma
3882 + htab->splt->output_offset
3884 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3885 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3886 htab->srelplt2->contents);
3887 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3888 rel.r_offset = (htab->splt->output_section->vma
3889 + htab->splt->output_offset
3891 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3892 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3893 htab->srelplt2->contents +
3894 sizeof (Elf32_External_Rel));
3898 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3899 really seem like the right value. */
3900 elf_section_data (htab->splt->output_section)
3901 ->this_hdr.sh_entsize = 4;
3903 /* Correct the .rel.plt.unloaded relocations. */
3904 if (htab->is_vxworks && !info->shared)
3906 int num_plts = (htab->splt->size / PLT_ENTRY_SIZE) - 1;
3909 p = htab->srelplt2->contents;
3911 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
3913 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
3915 for (; num_plts; num_plts--)
3917 Elf_Internal_Rela rel;
3918 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3919 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3920 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3921 p += sizeof (Elf32_External_Rel);
3923 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3924 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
3925 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3926 p += sizeof (Elf32_External_Rel);
3934 /* Fill in the first three entries in the global offset table. */
3935 if (htab->sgotplt->size > 0)
3937 bfd_put_32 (output_bfd,
3939 : sdyn->output_section->vma + sdyn->output_offset),
3940 htab->sgotplt->contents);
3941 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
3942 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
3945 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
3948 if (htab->sgot && htab->sgot->size > 0)
3949 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3954 /* Return address for Ith PLT stub in section PLT, for relocation REL
3955 or (bfd_vma) -1 if it should not be included. */
3958 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
3959 const arelent *rel ATTRIBUTE_UNUSED)
3961 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
3964 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
3967 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
3969 if (h->plt.offset != (bfd_vma) -1
3971 && !h->pointer_equality_needed)
3974 return _bfd_elf_hash_symbol (h);
3977 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3978 #define TARGET_LITTLE_NAME "elf32-i386"
3979 #define ELF_ARCH bfd_arch_i386
3980 #define ELF_MACHINE_CODE EM_386
3981 #define ELF_MAXPAGESIZE 0x1000
3983 #define elf_backend_can_gc_sections 1
3984 #define elf_backend_can_refcount 1
3985 #define elf_backend_want_got_plt 1
3986 #define elf_backend_plt_readonly 1
3987 #define elf_backend_want_plt_sym 0
3988 #define elf_backend_got_header_size 12
3990 /* Support RELA for objdump of prelink objects. */
3991 #define elf_info_to_howto elf_i386_info_to_howto_rel
3992 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3994 #define bfd_elf32_mkobject elf_i386_mkobject
3996 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3997 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3998 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3999 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4001 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4002 #define elf_backend_check_relocs elf_i386_check_relocs
4003 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
4004 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
4005 #define elf_backend_fake_sections elf_i386_fake_sections
4006 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4007 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4008 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4009 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
4010 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4011 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4012 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4013 #define elf_backend_relocate_section elf_i386_relocate_section
4014 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4015 #define elf_backend_always_size_sections elf_i386_always_size_sections
4016 #define elf_backend_omit_section_dynsym \
4017 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4018 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
4019 #define elf_backend_hash_symbol elf_i386_hash_symbol
4021 #include "elf32-target.h"
4023 /* FreeBSD support. */
4025 #undef TARGET_LITTLE_SYM
4026 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4027 #undef TARGET_LITTLE_NAME
4028 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4030 #define ELF_OSABI ELFOSABI_FREEBSD
4032 /* The kernel recognizes executables as valid only if they carry a
4033 "FreeBSD" label in the ELF header. So we put this label on all
4034 executables and (for simplicity) also all other object files. */
4037 elf_i386_post_process_headers (bfd *abfd,
4038 struct bfd_link_info *info ATTRIBUTE_UNUSED)
4040 Elf_Internal_Ehdr *i_ehdrp;
4042 i_ehdrp = elf_elfheader (abfd);
4044 /* Put an ABI label supported by FreeBSD >= 4.1. */
4045 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
4046 #ifdef OLD_FREEBSD_ABI_LABEL
4047 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4048 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4052 #undef elf_backend_post_process_headers
4053 #define elf_backend_post_process_headers elf_i386_post_process_headers
4055 #define elf32_bed elf32_i386_fbsd_bed
4057 #include "elf32-target.h"
4059 /* VxWorks support. */
4061 #undef TARGET_LITTLE_SYM
4062 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4063 #undef TARGET_LITTLE_NAME
4064 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4067 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4069 static struct bfd_link_hash_table *
4070 elf_i386_vxworks_link_hash_table_create (bfd *abfd)
4072 struct bfd_link_hash_table *ret;
4073 struct elf_i386_link_hash_table *htab;
4075 ret = elf_i386_link_hash_table_create (abfd);
4078 htab = (struct elf_i386_link_hash_table *) ret;
4079 htab->is_vxworks = 1;
4080 htab->plt0_pad_byte = 0x90;
4087 #undef elf_backend_post_process_headers
4088 #undef bfd_elf32_bfd_link_hash_table_create
4089 #define bfd_elf32_bfd_link_hash_table_create \
4090 elf_i386_vxworks_link_hash_table_create
4091 #undef elf_backend_add_symbol_hook
4092 #define elf_backend_add_symbol_hook \
4093 elf_vxworks_add_symbol_hook
4094 #undef elf_backend_link_output_symbol_hook
4095 #define elf_backend_link_output_symbol_hook \
4096 elf_vxworks_link_output_symbol_hook
4097 #undef elf_backend_emit_relocs
4098 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4099 #undef elf_backend_final_write_processing
4100 #define elf_backend_final_write_processing \
4101 elf_vxworks_final_write_processing
4103 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4105 #undef elf_backend_want_plt_sym
4106 #define elf_backend_want_plt_sym 1
4109 #define elf32_bed elf32_i386_vxworks_bed
4111 #include "elf32-target.h"