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 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 2 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, MA 02110-1301, USA. */
26 #include "elf-vxworks.h"
28 /* 386 uses REL relocations instead of RELA. */
33 static reloc_howto_type elf_howto_table[]=
35 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
36 bfd_elf_generic_reloc, "R_386_NONE",
37 TRUE, 0x00000000, 0x00000000, FALSE),
38 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
39 bfd_elf_generic_reloc, "R_386_32",
40 TRUE, 0xffffffff, 0xffffffff, FALSE),
41 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
42 bfd_elf_generic_reloc, "R_386_PC32",
43 TRUE, 0xffffffff, 0xffffffff, TRUE),
44 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
45 bfd_elf_generic_reloc, "R_386_GOT32",
46 TRUE, 0xffffffff, 0xffffffff, FALSE),
47 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
48 bfd_elf_generic_reloc, "R_386_PLT32",
49 TRUE, 0xffffffff, 0xffffffff, TRUE),
50 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
51 bfd_elf_generic_reloc, "R_386_COPY",
52 TRUE, 0xffffffff, 0xffffffff, FALSE),
53 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
54 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
55 TRUE, 0xffffffff, 0xffffffff, FALSE),
56 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
57 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
58 TRUE, 0xffffffff, 0xffffffff, FALSE),
59 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_386_RELATIVE",
61 TRUE, 0xffffffff, 0xffffffff, FALSE),
62 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_386_GOTOFF",
64 TRUE, 0xffffffff, 0xffffffff, FALSE),
65 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_386_GOTPC",
67 TRUE, 0xffffffff, 0xffffffff, TRUE),
69 /* We have a gap in the reloc numbers here.
70 R_386_standard counts the number up to this point, and
71 R_386_ext_offset is the value to subtract from a reloc type of
72 R_386_16 thru R_386_PC8 to form an index into this table. */
73 #define R_386_standard (R_386_GOTPC + 1)
74 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
76 /* These relocs are a GNU extension. */
77 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
79 TRUE, 0xffffffff, 0xffffffff, FALSE),
80 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_386_TLS_IE",
82 TRUE, 0xffffffff, 0xffffffff, FALSE),
83 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
85 TRUE, 0xffffffff, 0xffffffff, FALSE),
86 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_386_TLS_LE",
88 TRUE, 0xffffffff, 0xffffffff, FALSE),
89 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_386_TLS_GD",
91 TRUE, 0xffffffff, 0xffffffff, FALSE),
92 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_386_TLS_LDM",
94 TRUE, 0xffffffff, 0xffffffff, FALSE),
95 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_386_16",
97 TRUE, 0xffff, 0xffff, FALSE),
98 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_signed,
99 bfd_elf_generic_reloc, "R_386_PC16",
100 TRUE, 0xffff, 0xffff, TRUE),
101 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_386_8",
103 TRUE, 0xff, 0xff, FALSE),
104 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
105 bfd_elf_generic_reloc, "R_386_PC8",
106 TRUE, 0xff, 0xff, TRUE),
108 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
109 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
110 /* These are common with Solaris TLS implementation. */
111 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
113 TRUE, 0xffffffff, 0xffffffff, FALSE),
114 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
116 TRUE, 0xffffffff, 0xffffffff, FALSE),
117 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
119 TRUE, 0xffffffff, 0xffffffff, FALSE),
120 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
122 TRUE, 0xffffffff, 0xffffffff, FALSE),
123 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
125 TRUE, 0xffffffff, 0xffffffff, FALSE),
126 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
128 TRUE, 0xffffffff, 0xffffffff, FALSE),
131 #define R_386_tls (R_386_TLS_TPOFF32 + 1 - R_386_tls_offset)
132 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
134 /* GNU extension to record C++ vtable hierarchy. */
135 HOWTO (R_386_GNU_VTINHERIT, /* type */
137 2, /* size (0 = byte, 1 = short, 2 = long) */
139 FALSE, /* pc_relative */
141 complain_overflow_dont, /* complain_on_overflow */
142 NULL, /* special_function */
143 "R_386_GNU_VTINHERIT", /* name */
144 FALSE, /* partial_inplace */
147 FALSE), /* pcrel_offset */
149 /* GNU extension to record C++ vtable member usage. */
150 HOWTO (R_386_GNU_VTENTRY, /* type */
152 2, /* size (0 = byte, 1 = short, 2 = long) */
154 FALSE, /* pc_relative */
156 complain_overflow_dont, /* complain_on_overflow */
157 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
158 "R_386_GNU_VTENTRY", /* name */
159 FALSE, /* partial_inplace */
162 FALSE) /* pcrel_offset */
164 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
168 #ifdef DEBUG_GEN_RELOC
170 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
175 static reloc_howto_type *
176 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
177 bfd_reloc_code_real_type code)
182 TRACE ("BFD_RELOC_NONE");
183 return &elf_howto_table[R_386_NONE];
186 TRACE ("BFD_RELOC_32");
187 return &elf_howto_table[R_386_32];
190 TRACE ("BFD_RELOC_CTOR");
191 return &elf_howto_table[R_386_32];
193 case BFD_RELOC_32_PCREL:
194 TRACE ("BFD_RELOC_PC32");
195 return &elf_howto_table[R_386_PC32];
197 case BFD_RELOC_386_GOT32:
198 TRACE ("BFD_RELOC_386_GOT32");
199 return &elf_howto_table[R_386_GOT32];
201 case BFD_RELOC_386_PLT32:
202 TRACE ("BFD_RELOC_386_PLT32");
203 return &elf_howto_table[R_386_PLT32];
205 case BFD_RELOC_386_COPY:
206 TRACE ("BFD_RELOC_386_COPY");
207 return &elf_howto_table[R_386_COPY];
209 case BFD_RELOC_386_GLOB_DAT:
210 TRACE ("BFD_RELOC_386_GLOB_DAT");
211 return &elf_howto_table[R_386_GLOB_DAT];
213 case BFD_RELOC_386_JUMP_SLOT:
214 TRACE ("BFD_RELOC_386_JUMP_SLOT");
215 return &elf_howto_table[R_386_JUMP_SLOT];
217 case BFD_RELOC_386_RELATIVE:
218 TRACE ("BFD_RELOC_386_RELATIVE");
219 return &elf_howto_table[R_386_RELATIVE];
221 case BFD_RELOC_386_GOTOFF:
222 TRACE ("BFD_RELOC_386_GOTOFF");
223 return &elf_howto_table[R_386_GOTOFF];
225 case BFD_RELOC_386_GOTPC:
226 TRACE ("BFD_RELOC_386_GOTPC");
227 return &elf_howto_table[R_386_GOTPC];
229 /* These relocs are a GNU extension. */
230 case BFD_RELOC_386_TLS_TPOFF:
231 TRACE ("BFD_RELOC_386_TLS_TPOFF");
232 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
234 case BFD_RELOC_386_TLS_IE:
235 TRACE ("BFD_RELOC_386_TLS_IE");
236 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
238 case BFD_RELOC_386_TLS_GOTIE:
239 TRACE ("BFD_RELOC_386_TLS_GOTIE");
240 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
242 case BFD_RELOC_386_TLS_LE:
243 TRACE ("BFD_RELOC_386_TLS_LE");
244 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
246 case BFD_RELOC_386_TLS_GD:
247 TRACE ("BFD_RELOC_386_TLS_GD");
248 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
250 case BFD_RELOC_386_TLS_LDM:
251 TRACE ("BFD_RELOC_386_TLS_LDM");
252 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
255 TRACE ("BFD_RELOC_16");
256 return &elf_howto_table[R_386_16 - R_386_ext_offset];
258 case BFD_RELOC_16_PCREL:
259 TRACE ("BFD_RELOC_16_PCREL");
260 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
263 TRACE ("BFD_RELOC_8");
264 return &elf_howto_table[R_386_8 - R_386_ext_offset];
266 case BFD_RELOC_8_PCREL:
267 TRACE ("BFD_RELOC_8_PCREL");
268 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
270 /* Common with Sun TLS implementation. */
271 case BFD_RELOC_386_TLS_LDO_32:
272 TRACE ("BFD_RELOC_386_TLS_LDO_32");
273 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
275 case BFD_RELOC_386_TLS_IE_32:
276 TRACE ("BFD_RELOC_386_TLS_IE_32");
277 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
279 case BFD_RELOC_386_TLS_LE_32:
280 TRACE ("BFD_RELOC_386_TLS_LE_32");
281 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
283 case BFD_RELOC_386_TLS_DTPMOD32:
284 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
285 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
287 case BFD_RELOC_386_TLS_DTPOFF32:
288 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
289 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
291 case BFD_RELOC_386_TLS_TPOFF32:
292 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
293 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
295 case BFD_RELOC_VTABLE_INHERIT:
296 TRACE ("BFD_RELOC_VTABLE_INHERIT");
297 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
299 case BFD_RELOC_VTABLE_ENTRY:
300 TRACE ("BFD_RELOC_VTABLE_ENTRY");
301 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
312 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
314 Elf_Internal_Rela *dst)
316 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
319 if ((indx = r_type) >= R_386_standard
320 && ((indx = r_type - R_386_ext_offset) - R_386_standard
321 >= R_386_ext - R_386_standard)
322 && ((indx = r_type - R_386_tls_offset) - R_386_ext
323 >= R_386_tls - R_386_ext)
324 && ((indx = r_type - R_386_vt_offset) - R_386_tls
325 >= R_386_vt - R_386_tls))
327 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
331 cache_ptr->howto = &elf_howto_table[indx];
334 /* Return whether a symbol name implies a local label. The UnixWare
335 2.1 cc generates temporary symbols that start with .X, so we
336 recognize them here. FIXME: do other SVR4 compilers also use .X?.
337 If so, we should move the .X recognition into
338 _bfd_elf_is_local_label_name. */
341 elf_i386_is_local_label_name (bfd *abfd, const char *name)
343 if (name[0] == '.' && name[1] == 'X')
346 return _bfd_elf_is_local_label_name (abfd, name);
349 /* Support for core dump NOTE sections. */
352 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
357 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
359 int pr_version = bfd_get_32 (abfd, note->descdata);
365 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
368 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
372 size = bfd_get_32 (abfd, note->descdata + 8);
376 switch (note->descsz)
381 case 144: /* Linux/i386 */
383 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
386 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
396 /* Make a ".reg/999" section. */
397 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
398 size, note->descpos + offset);
402 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
404 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
406 int pr_version = bfd_get_32 (abfd, note->descdata);
411 elf_tdata (abfd)->core_program
412 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
413 elf_tdata (abfd)->core_command
414 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
418 switch (note->descsz)
423 case 124: /* Linux/i386 elf_prpsinfo. */
424 elf_tdata (abfd)->core_program
425 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
426 elf_tdata (abfd)->core_command
427 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
431 /* Note that for some reason, a spurious space is tacked
432 onto the end of the args in some (at least one anyway)
433 implementations, so strip it off if it exists. */
435 char *command = elf_tdata (abfd)->core_command;
436 int n = strlen (command);
438 if (0 < n && command[n - 1] == ' ')
439 command[n - 1] = '\0';
445 /* Functions for the i386 ELF linker.
447 In order to gain some understanding of code in this file without
448 knowing all the intricate details of the linker, note the
451 Functions named elf_i386_* are called by external routines, other
452 functions are only called locally. elf_i386_* functions appear
453 in this file more or less in the order in which they are called
454 from external routines. eg. elf_i386_check_relocs is called
455 early in the link process, elf_i386_finish_dynamic_sections is
456 one of the last functions. */
459 /* The name of the dynamic interpreter. This is put in the .interp
462 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
464 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
465 copying dynamic variables from a shared lib into an app's dynbss
466 section, and instead use a dynamic relocation to point into the
468 #define ELIMINATE_COPY_RELOCS 1
470 /* The size in bytes of an entry in the procedure linkage table. */
472 #define PLT_ENTRY_SIZE 16
474 /* The first entry in an absolute procedure linkage table looks like
475 this. See the SVR4 ABI i386 supplement to see how this works.
476 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
478 static const bfd_byte elf_i386_plt0_entry[12] =
480 0xff, 0x35, /* pushl contents of address */
481 0, 0, 0, 0, /* replaced with address of .got + 4. */
482 0xff, 0x25, /* jmp indirect */
483 0, 0, 0, 0 /* replaced with address of .got + 8. */
486 /* Subsequent entries in an absolute procedure linkage table look like
489 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
491 0xff, 0x25, /* jmp indirect */
492 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
493 0x68, /* pushl immediate */
494 0, 0, 0, 0, /* replaced with offset into relocation table. */
495 0xe9, /* jmp relative */
496 0, 0, 0, 0 /* replaced with offset to start of .plt. */
499 /* The first entry in a PIC procedure linkage table look like this.
500 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
502 static const bfd_byte elf_i386_pic_plt0_entry[12] =
504 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
505 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
508 /* Subsequent entries in a PIC procedure linkage table look like this. */
510 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
512 0xff, 0xa3, /* jmp *offset(%ebx) */
513 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
514 0x68, /* pushl immediate */
515 0, 0, 0, 0, /* replaced with offset into relocation table. */
516 0xe9, /* jmp relative */
517 0, 0, 0, 0 /* replaced with offset to start of .plt. */
520 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
521 for the PLTResolve stub and then for each PLT entry. */
522 #define PLTRESOLVE_RELOCS_SHLIB 0
523 #define PLTRESOLVE_RELOCS 2
524 #define PLT_NON_JUMP_SLOT_RELOCS 2
526 /* The i386 linker needs to keep track of the number of relocs that it
527 decides to copy as dynamic relocs in check_relocs for each symbol.
528 This is so that it can later discard them if they are found to be
529 unnecessary. We store the information in a field extending the
530 regular ELF linker hash table. */
532 struct elf_i386_dyn_relocs
534 struct elf_i386_dyn_relocs *next;
536 /* The input section of the reloc. */
539 /* Total number of relocs copied for the input section. */
542 /* Number of pc-relative relocs copied for the input section. */
543 bfd_size_type pc_count;
546 /* i386 ELF linker hash entry. */
548 struct elf_i386_link_hash_entry
550 struct elf_link_hash_entry elf;
552 /* Track dynamic relocs copied for this symbol. */
553 struct elf_i386_dyn_relocs *dyn_relocs;
555 #define GOT_UNKNOWN 0
559 #define GOT_TLS_IE_POS 5
560 #define GOT_TLS_IE_NEG 6
561 #define GOT_TLS_IE_BOTH 7
562 unsigned char tls_type;
565 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
567 struct elf_i386_obj_tdata
569 struct elf_obj_tdata root;
571 /* tls_type for each local got entry. */
572 char *local_got_tls_type;
575 #define elf_i386_tdata(abfd) \
576 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
578 #define elf_i386_local_got_tls_type(abfd) \
579 (elf_i386_tdata (abfd)->local_got_tls_type)
582 elf_i386_mkobject (bfd *abfd)
584 bfd_size_type amt = sizeof (struct elf_i386_obj_tdata);
585 abfd->tdata.any = bfd_zalloc (abfd, amt);
586 if (abfd->tdata.any == NULL)
591 /* i386 ELF linker hash table. */
593 struct elf_i386_link_hash_table
595 struct elf_link_hash_table elf;
597 /* Short-cuts to get to dynamic linker sections. */
606 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
609 /* Short-cuts to frequently used symbols for VxWorks targets. */
610 struct elf_link_hash_entry *hgot, *hplt;
612 /* True if the target system is VxWorks. */
615 /* Value used to fill the last word of the first plt entry. */
616 bfd_byte plt0_pad_byte;
619 bfd_signed_vma refcount;
623 /* Small local sym to section mapping cache. */
624 struct sym_sec_cache sym_sec;
627 /* Get the i386 ELF linker hash table from a link_info structure. */
629 #define elf_i386_hash_table(p) \
630 ((struct elf_i386_link_hash_table *) ((p)->hash))
632 /* Create an entry in an i386 ELF linker hash table. */
634 static struct bfd_hash_entry *
635 link_hash_newfunc (struct bfd_hash_entry *entry,
636 struct bfd_hash_table *table,
639 /* Allocate the structure if it has not already been allocated by a
643 entry = bfd_hash_allocate (table,
644 sizeof (struct elf_i386_link_hash_entry));
649 /* Call the allocation method of the superclass. */
650 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
653 struct elf_i386_link_hash_entry *eh;
655 eh = (struct elf_i386_link_hash_entry *) entry;
656 eh->dyn_relocs = NULL;
657 eh->tls_type = GOT_UNKNOWN;
663 /* Create an i386 ELF linker hash table. */
665 static struct bfd_link_hash_table *
666 elf_i386_link_hash_table_create (bfd *abfd)
668 struct elf_i386_link_hash_table *ret;
669 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
671 ret = bfd_malloc (amt);
675 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
688 ret->tls_ldm_got.refcount = 0;
689 ret->sym_sec.abfd = NULL;
691 ret->srelplt2 = NULL;
694 ret->plt0_pad_byte = 0;
696 return &ret->elf.root;
699 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
700 shortcuts to them in our hash table. */
703 create_got_section (bfd *dynobj, struct bfd_link_info *info)
705 struct elf_i386_link_hash_table *htab;
707 if (! _bfd_elf_create_got_section (dynobj, info))
710 htab = elf_i386_hash_table (info);
711 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
712 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
713 if (!htab->sgot || !htab->sgotplt)
716 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got",
717 (SEC_ALLOC | SEC_LOAD
722 if (htab->srelgot == NULL
723 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
728 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
729 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
733 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
735 struct elf_i386_link_hash_table *htab;
738 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
740 htab = elf_i386_hash_table (info);
741 if (!htab->sgot && !create_got_section (dynobj, info))
744 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
747 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
748 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
749 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
751 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
753 if (!htab->splt || !htab->srelplt || !htab->sdynbss
754 || (!info->shared && !htab->srelbss))
757 if (htab->is_vxworks && !info->shared)
759 s = bfd_make_section (dynobj, ".rel.plt.unloaded");
760 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY
761 | SEC_LINKER_CREATED);
763 || ! bfd_set_section_flags (dynobj, s, flags)
764 || ! bfd_set_section_alignment (dynobj, s, bed->s->log_file_align))
772 /* Copy the extra info we tack onto an elf_link_hash_entry. */
775 elf_i386_copy_indirect_symbol (const struct elf_backend_data *bed,
776 struct elf_link_hash_entry *dir,
777 struct elf_link_hash_entry *ind)
779 struct elf_i386_link_hash_entry *edir, *eind;
781 edir = (struct elf_i386_link_hash_entry *) dir;
782 eind = (struct elf_i386_link_hash_entry *) ind;
784 if (eind->dyn_relocs != NULL)
786 if (edir->dyn_relocs != NULL)
788 struct elf_i386_dyn_relocs **pp;
789 struct elf_i386_dyn_relocs *p;
791 if (ind->root.type == bfd_link_hash_indirect)
794 /* Add reloc counts against the weak sym to the strong sym
795 list. Merge any entries against the same section. */
796 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
798 struct elf_i386_dyn_relocs *q;
800 for (q = edir->dyn_relocs; q != NULL; q = q->next)
801 if (q->sec == p->sec)
803 q->pc_count += p->pc_count;
804 q->count += p->count;
811 *pp = edir->dyn_relocs;
814 edir->dyn_relocs = eind->dyn_relocs;
815 eind->dyn_relocs = NULL;
818 if (ind->root.type == bfd_link_hash_indirect
819 && dir->got.refcount <= 0)
821 edir->tls_type = eind->tls_type;
822 eind->tls_type = GOT_UNKNOWN;
825 if (ELIMINATE_COPY_RELOCS
826 && ind->root.type != bfd_link_hash_indirect
827 && dir->dynamic_adjusted)
829 /* If called to transfer flags for a weakdef during processing
830 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
831 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
832 dir->ref_dynamic |= ind->ref_dynamic;
833 dir->ref_regular |= ind->ref_regular;
834 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
835 dir->needs_plt |= ind->needs_plt;
836 dir->pointer_equality_needed |= ind->pointer_equality_needed;
839 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
843 elf_i386_tls_transition (struct bfd_link_info *info, int r_type, int is_local)
851 case R_386_TLS_IE_32:
853 return R_386_TLS_LE_32;
854 return R_386_TLS_IE_32;
856 case R_386_TLS_GOTIE:
858 return R_386_TLS_LE_32;
861 return R_386_TLS_LE_32;
867 /* Look through the relocs for a section during the first phase, and
868 calculate needed space in the global offset table, procedure linkage
869 table, and dynamic reloc sections. */
872 elf_i386_check_relocs (bfd *abfd,
873 struct bfd_link_info *info,
875 const Elf_Internal_Rela *relocs)
877 struct elf_i386_link_hash_table *htab;
878 Elf_Internal_Shdr *symtab_hdr;
879 struct elf_link_hash_entry **sym_hashes;
880 const Elf_Internal_Rela *rel;
881 const Elf_Internal_Rela *rel_end;
884 if (info->relocatable)
887 htab = elf_i386_hash_table (info);
888 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
889 sym_hashes = elf_sym_hashes (abfd);
893 rel_end = relocs + sec->reloc_count;
894 for (rel = relocs; rel < rel_end; rel++)
897 unsigned long r_symndx;
898 struct elf_link_hash_entry *h;
900 r_symndx = ELF32_R_SYM (rel->r_info);
901 r_type = ELF32_R_TYPE (rel->r_info);
903 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
905 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
911 if (r_symndx < symtab_hdr->sh_info)
915 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
916 while (h->root.type == bfd_link_hash_indirect
917 || h->root.type == bfd_link_hash_warning)
918 h = (struct elf_link_hash_entry *) h->root.u.i.link;
921 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
926 htab->tls_ldm_got.refcount += 1;
930 /* This symbol requires a procedure linkage table entry. We
931 actually build the entry in adjust_dynamic_symbol,
932 because this might be a case of linking PIC code which is
933 never referenced by a dynamic object, in which case we
934 don't need to generate a procedure linkage table entry
937 /* If this is a local symbol, we resolve it directly without
938 creating a procedure linkage table entry. */
943 h->plt.refcount += 1;
946 case R_386_TLS_IE_32:
948 case R_386_TLS_GOTIE:
950 info->flags |= DF_STATIC_TLS;
955 /* This symbol requires a global offset table entry. */
957 int tls_type, old_tls_type;
962 case R_386_GOT32: tls_type = GOT_NORMAL; break;
963 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
964 case R_386_TLS_IE_32:
965 if (ELF32_R_TYPE (rel->r_info) == r_type)
966 tls_type = GOT_TLS_IE_NEG;
968 /* If this is a GD->IE transition, we may use either of
969 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
970 tls_type = GOT_TLS_IE;
973 case R_386_TLS_GOTIE:
974 tls_type = GOT_TLS_IE_POS; break;
979 h->got.refcount += 1;
980 old_tls_type = elf_i386_hash_entry(h)->tls_type;
984 bfd_signed_vma *local_got_refcounts;
986 /* This is a global offset table entry for a local symbol. */
987 local_got_refcounts = elf_local_got_refcounts (abfd);
988 if (local_got_refcounts == NULL)
992 size = symtab_hdr->sh_info;
993 size *= (sizeof (bfd_signed_vma) + sizeof(char));
994 local_got_refcounts = bfd_zalloc (abfd, size);
995 if (local_got_refcounts == NULL)
997 elf_local_got_refcounts (abfd) = local_got_refcounts;
998 elf_i386_local_got_tls_type (abfd)
999 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1001 local_got_refcounts[r_symndx] += 1;
1002 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1005 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1006 tls_type |= old_tls_type;
1007 /* If a TLS symbol is accessed using IE at least once,
1008 there is no point to use dynamic model for it. */
1009 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1010 && (old_tls_type != GOT_TLS_GD
1011 || (tls_type & GOT_TLS_IE) == 0))
1013 if ((old_tls_type & GOT_TLS_IE) && tls_type == GOT_TLS_GD)
1014 tls_type = old_tls_type;
1017 (*_bfd_error_handler)
1018 (_("%B: `%s' accessed both as normal and "
1019 "thread local symbol"),
1021 h ? h->root.root.string : "<local>");
1026 if (old_tls_type != tls_type)
1029 elf_i386_hash_entry (h)->tls_type = tls_type;
1031 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1039 if (htab->sgot == NULL)
1041 if (htab->elf.dynobj == NULL)
1042 htab->elf.dynobj = abfd;
1043 if (!create_got_section (htab->elf.dynobj, info))
1046 if (r_type != R_386_TLS_IE)
1050 case R_386_TLS_LE_32:
1054 info->flags |= DF_STATIC_TLS;
1059 if (h != NULL && !info->shared)
1061 /* If this reloc is in a read-only section, we might
1062 need a copy reloc. We can't check reliably at this
1063 stage whether the section is read-only, as input
1064 sections have not yet been mapped to output sections.
1065 Tentatively set the flag for now, and correct in
1066 adjust_dynamic_symbol. */
1069 /* We may need a .plt entry if the function this reloc
1070 refers to is in a shared lib. */
1071 h->plt.refcount += 1;
1072 if (r_type != R_386_PC32)
1073 h->pointer_equality_needed = 1;
1076 /* If we are creating a shared library, and this is a reloc
1077 against a global symbol, or a non PC relative reloc
1078 against a local symbol, then we need to copy the reloc
1079 into the shared library. However, if we are linking with
1080 -Bsymbolic, we do not need to copy a reloc against a
1081 global symbol which is defined in an object we are
1082 including in the link (i.e., DEF_REGULAR is set). At
1083 this point we have not seen all the input files, so it is
1084 possible that DEF_REGULAR is not set now but will be set
1085 later (it is never cleared). In case of a weak definition,
1086 DEF_REGULAR may be cleared later by a strong definition in
1087 a shared library. We account for that possibility below by
1088 storing information in the relocs_copied field of the hash
1089 table entry. A similar situation occurs when creating
1090 shared libraries and symbol visibility changes render the
1093 If on the other hand, we are creating an executable, we
1094 may need to keep relocations for symbols satisfied by a
1095 dynamic library if we manage to avoid copy relocs for the
1098 && (sec->flags & SEC_ALLOC) != 0
1099 && (r_type != R_386_PC32
1101 && (! info->symbolic
1102 || h->root.type == bfd_link_hash_defweak
1103 || !h->def_regular))))
1104 || (ELIMINATE_COPY_RELOCS
1106 && (sec->flags & SEC_ALLOC) != 0
1108 && (h->root.type == bfd_link_hash_defweak
1109 || !h->def_regular)))
1111 struct elf_i386_dyn_relocs *p;
1112 struct elf_i386_dyn_relocs **head;
1114 /* We must copy these reloc types into the output file.
1115 Create a reloc section in dynobj and make room for
1121 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1122 unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
1124 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
1128 if (strncmp (name, ".rel", 4) != 0
1129 || strcmp (bfd_get_section_name (abfd, sec),
1132 (*_bfd_error_handler)
1133 (_("%B: bad relocation section name `%s\'"),
1137 if (htab->elf.dynobj == NULL)
1138 htab->elf.dynobj = abfd;
1140 dynobj = htab->elf.dynobj;
1141 sreloc = bfd_get_section_by_name (dynobj, name);
1146 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1147 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1148 if ((sec->flags & SEC_ALLOC) != 0)
1149 flags |= SEC_ALLOC | SEC_LOAD;
1150 sreloc = bfd_make_section_with_flags (dynobj,
1154 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1157 elf_section_data (sec)->sreloc = sreloc;
1160 /* If this is a global symbol, we count the number of
1161 relocations we need for this symbol. */
1164 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1168 /* Track dynamic relocs needed for local syms too.
1169 We really need local syms available to do this
1173 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1178 head = ((struct elf_i386_dyn_relocs **)
1179 &elf_section_data (s)->local_dynrel);
1183 if (p == NULL || p->sec != sec)
1185 bfd_size_type amt = sizeof *p;
1186 p = bfd_alloc (htab->elf.dynobj, amt);
1197 if (r_type == R_386_PC32)
1202 /* This relocation describes the C++ object vtable hierarchy.
1203 Reconstruct it for later use during GC. */
1204 case R_386_GNU_VTINHERIT:
1205 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1209 /* This relocation describes which C++ vtable entries are actually
1210 used. Record for later use during GC. */
1211 case R_386_GNU_VTENTRY:
1212 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1224 /* Return the section that should be marked against GC for a given
1228 elf_i386_gc_mark_hook (asection *sec,
1229 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1230 Elf_Internal_Rela *rel,
1231 struct elf_link_hash_entry *h,
1232 Elf_Internal_Sym *sym)
1236 switch (ELF32_R_TYPE (rel->r_info))
1238 case R_386_GNU_VTINHERIT:
1239 case R_386_GNU_VTENTRY:
1243 switch (h->root.type)
1245 case bfd_link_hash_defined:
1246 case bfd_link_hash_defweak:
1247 return h->root.u.def.section;
1249 case bfd_link_hash_common:
1250 return h->root.u.c.p->section;
1258 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1263 /* Update the got entry reference counts for the section being removed. */
1266 elf_i386_gc_sweep_hook (bfd *abfd,
1267 struct bfd_link_info *info,
1269 const Elf_Internal_Rela *relocs)
1271 Elf_Internal_Shdr *symtab_hdr;
1272 struct elf_link_hash_entry **sym_hashes;
1273 bfd_signed_vma *local_got_refcounts;
1274 const Elf_Internal_Rela *rel, *relend;
1276 elf_section_data (sec)->local_dynrel = NULL;
1278 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1279 sym_hashes = elf_sym_hashes (abfd);
1280 local_got_refcounts = elf_local_got_refcounts (abfd);
1282 relend = relocs + sec->reloc_count;
1283 for (rel = relocs; rel < relend; rel++)
1285 unsigned long r_symndx;
1286 unsigned int r_type;
1287 struct elf_link_hash_entry *h = NULL;
1289 r_symndx = ELF32_R_SYM (rel->r_info);
1290 if (r_symndx >= symtab_hdr->sh_info)
1292 struct elf_i386_link_hash_entry *eh;
1293 struct elf_i386_dyn_relocs **pp;
1294 struct elf_i386_dyn_relocs *p;
1296 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1297 while (h->root.type == bfd_link_hash_indirect
1298 || h->root.type == bfd_link_hash_warning)
1299 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1300 eh = (struct elf_i386_link_hash_entry *) h;
1302 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1305 /* Everything must go for SEC. */
1311 r_type = ELF32_R_TYPE (rel->r_info);
1312 r_type = elf_i386_tls_transition (info, r_type, h != NULL);
1316 if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1317 elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1321 case R_386_TLS_IE_32:
1323 case R_386_TLS_GOTIE:
1327 if (h->got.refcount > 0)
1328 h->got.refcount -= 1;
1330 else if (local_got_refcounts != NULL)
1332 if (local_got_refcounts[r_symndx] > 0)
1333 local_got_refcounts[r_symndx] -= 1;
1346 if (h->plt.refcount > 0)
1347 h->plt.refcount -= 1;
1359 /* Adjust a symbol defined by a dynamic object and referenced by a
1360 regular object. The current definition is in some section of the
1361 dynamic object, but we're not including those sections. We have to
1362 change the definition to something the rest of the link can
1366 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1367 struct elf_link_hash_entry *h)
1369 struct elf_i386_link_hash_table *htab;
1371 unsigned int power_of_two;
1373 /* If this is a function, put it in the procedure linkage table. We
1374 will fill in the contents of the procedure linkage table later,
1375 when we know the address of the .got section. */
1376 if (h->type == STT_FUNC
1379 if (h->plt.refcount <= 0
1380 || SYMBOL_CALLS_LOCAL (info, h)
1381 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1382 && h->root.type == bfd_link_hash_undefweak))
1384 /* This case can occur if we saw a PLT32 reloc in an input
1385 file, but the symbol was never referred to by a dynamic
1386 object, or if all references were garbage collected. In
1387 such a case, we don't actually need to build a procedure
1388 linkage table, and we can just do a PC32 reloc instead. */
1389 h->plt.offset = (bfd_vma) -1;
1396 /* It's possible that we incorrectly decided a .plt reloc was
1397 needed for an R_386_PC32 reloc to a non-function sym in
1398 check_relocs. We can't decide accurately between function and
1399 non-function syms in check-relocs; Objects loaded later in
1400 the link may change h->type. So fix it now. */
1401 h->plt.offset = (bfd_vma) -1;
1403 /* If this is a weak symbol, and there is a real definition, the
1404 processor independent code will have arranged for us to see the
1405 real definition first, and we can just use the same value. */
1406 if (h->u.weakdef != NULL)
1408 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1409 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1410 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1411 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1412 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1413 h->non_got_ref = h->u.weakdef->non_got_ref;
1417 /* This is a reference to a symbol defined by a dynamic object which
1418 is not a function. */
1420 /* If we are creating a shared library, we must presume that the
1421 only references to the symbol are via the global offset table.
1422 For such cases we need not do anything here; the relocations will
1423 be handled correctly by relocate_section. */
1427 /* If there are no references to this symbol that do not use the
1428 GOT, we don't need to generate a copy reloc. */
1429 if (!h->non_got_ref)
1432 /* If -z nocopyreloc was given, we won't generate them either. */
1433 if (info->nocopyreloc)
1439 htab = elf_i386_hash_table (info);
1441 /* If there aren't any dynamic relocs in read-only sections, then
1442 we can keep the dynamic relocs and avoid the copy reloc. This
1443 doesn't work on VxWorks, where we can not have dynamic relocations
1444 (other than copy and jump slot relocations) in an executable. */
1445 if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
1447 struct elf_i386_link_hash_entry * eh;
1448 struct elf_i386_dyn_relocs *p;
1450 eh = (struct elf_i386_link_hash_entry *) h;
1451 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1453 s = p->sec->output_section;
1454 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1465 /* We must allocate the symbol in our .dynbss section, which will
1466 become part of the .bss section of the executable. There will be
1467 an entry for this symbol in the .dynsym section. The dynamic
1468 object will contain position independent code, so all references
1469 from the dynamic object to this symbol will go through the global
1470 offset table. The dynamic linker will use the .dynsym entry to
1471 determine the address it must put in the global offset table, so
1472 both the dynamic object and the regular object will refer to the
1473 same memory location for the variable. */
1475 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1476 copy the initial value out of the dynamic object and into the
1477 runtime process image. */
1478 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1480 htab->srelbss->size += sizeof (Elf32_External_Rel);
1484 /* We need to figure out the alignment required for this symbol. I
1485 have no idea how ELF linkers handle this. */
1486 power_of_two = bfd_log2 (h->size);
1487 if (power_of_two > 3)
1490 /* Apply the required alignment. */
1492 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1493 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1495 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1499 /* Define the symbol as being at this point in the section. */
1500 h->root.u.def.section = s;
1501 h->root.u.def.value = s->size;
1503 /* Increment the section size to make room for the symbol. */
1509 /* Allocate space in .plt, .got and associated reloc sections for
1513 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1515 struct bfd_link_info *info;
1516 struct elf_i386_link_hash_table *htab;
1517 struct elf_i386_link_hash_entry *eh;
1518 struct elf_i386_dyn_relocs *p;
1520 if (h->root.type == bfd_link_hash_indirect)
1523 if (h->root.type == bfd_link_hash_warning)
1524 /* When warning symbols are created, they **replace** the "real"
1525 entry in the hash table, thus we never get to see the real
1526 symbol in a hash traversal. So look at it now. */
1527 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1529 info = (struct bfd_link_info *) inf;
1530 htab = elf_i386_hash_table (info);
1532 if (htab->elf.dynamic_sections_created
1533 && h->plt.refcount > 0)
1535 /* Make sure this symbol is output as a dynamic symbol.
1536 Undefined weak syms won't yet be marked as dynamic. */
1537 if (h->dynindx == -1
1538 && !h->forced_local)
1540 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1545 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1547 asection *s = htab->splt;
1549 /* If this is the first .plt entry, make room for the special
1552 s->size += PLT_ENTRY_SIZE;
1554 h->plt.offset = s->size;
1556 /* If this symbol is not defined in a regular file, and we are
1557 not generating a shared library, then set the symbol to this
1558 location in the .plt. This is required to make function
1559 pointers compare as equal between the normal executable and
1560 the shared library. */
1564 h->root.u.def.section = s;
1565 h->root.u.def.value = h->plt.offset;
1568 /* Make room for this entry. */
1569 s->size += PLT_ENTRY_SIZE;
1571 /* We also need to make an entry in the .got.plt section, which
1572 will be placed in the .got section by the linker script. */
1573 htab->sgotplt->size += 4;
1575 /* We also need to make an entry in the .rel.plt section. */
1576 htab->srelplt->size += sizeof (Elf32_External_Rel);
1578 if (htab->is_vxworks && !info->shared)
1580 /* VxWorks has a second set of relocations for each PLT entry
1581 in executables. They go in a separate relocation section,
1582 which is processed by the kernel loader. */
1584 /* There are two relocations for the initial PLT entry: an
1585 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1586 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1588 if (h->plt.offset == PLT_ENTRY_SIZE)
1589 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1591 /* There are two extra relocations for each subsequent PLT entry:
1592 an R_386_32 relocation for the GOT entry, and an R_386_32
1593 relocation for the PLT entry. */
1595 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1600 h->plt.offset = (bfd_vma) -1;
1606 h->plt.offset = (bfd_vma) -1;
1610 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1611 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1612 if (h->got.refcount > 0
1615 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
1616 h->got.offset = (bfd_vma) -1;
1617 else if (h->got.refcount > 0)
1621 int tls_type = elf_i386_hash_entry(h)->tls_type;
1623 /* Make sure this symbol is output as a dynamic symbol.
1624 Undefined weak syms won't yet be marked as dynamic. */
1625 if (h->dynindx == -1
1626 && !h->forced_local)
1628 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1633 h->got.offset = s->size;
1635 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1636 if (tls_type == GOT_TLS_GD || tls_type == GOT_TLS_IE_BOTH)
1638 dyn = htab->elf.dynamic_sections_created;
1639 /* R_386_TLS_IE_32 needs one dynamic relocation,
1640 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1641 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1642 need two), R_386_TLS_GD needs one if local symbol and two if
1644 if (tls_type == GOT_TLS_IE_BOTH)
1645 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
1646 else if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1647 || (tls_type & GOT_TLS_IE))
1648 htab->srelgot->size += sizeof (Elf32_External_Rel);
1649 else if (tls_type == GOT_TLS_GD)
1650 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
1651 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1652 || h->root.type != bfd_link_hash_undefweak)
1654 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1655 htab->srelgot->size += sizeof (Elf32_External_Rel);
1658 h->got.offset = (bfd_vma) -1;
1660 eh = (struct elf_i386_link_hash_entry *) h;
1661 if (eh->dyn_relocs == NULL)
1664 /* In the shared -Bsymbolic case, discard space allocated for
1665 dynamic pc-relative relocs against symbols which turn out to be
1666 defined in regular objects. For the normal shared case, discard
1667 space for pc-relative relocs that have become local due to symbol
1668 visibility changes. */
1672 /* The only reloc that uses pc_count is R_386_PC32, which will
1673 appear on a call or on something like ".long foo - .". We
1674 want calls to protected symbols to resolve directly to the
1675 function rather than going via the plt. If people want
1676 function pointer comparisons to work as expected then they
1677 should avoid writing assembly like ".long foo - .". */
1678 if (SYMBOL_CALLS_LOCAL (info, h))
1680 struct elf_i386_dyn_relocs **pp;
1682 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1684 p->count -= p->pc_count;
1693 /* Also discard relocs on undefined weak syms with non-default
1695 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1696 && h->root.type == bfd_link_hash_undefweak)
1697 eh->dyn_relocs = NULL;
1699 else if (ELIMINATE_COPY_RELOCS)
1701 /* For the non-shared case, discard space for relocs against
1702 symbols which turn out to need copy relocs or are not
1708 || (htab->elf.dynamic_sections_created
1709 && (h->root.type == bfd_link_hash_undefweak
1710 || h->root.type == bfd_link_hash_undefined))))
1712 /* Make sure this symbol is output as a dynamic symbol.
1713 Undefined weak syms won't yet be marked as dynamic. */
1714 if (h->dynindx == -1
1715 && !h->forced_local)
1717 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1721 /* If that succeeded, we know we'll be keeping all the
1723 if (h->dynindx != -1)
1727 eh->dyn_relocs = NULL;
1732 /* Finally, allocate space. */
1733 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1735 asection *sreloc = elf_section_data (p->sec)->sreloc;
1736 sreloc->size += p->count * sizeof (Elf32_External_Rel);
1742 /* Find any dynamic relocs that apply to read-only sections. */
1745 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1747 struct elf_i386_link_hash_entry *eh;
1748 struct elf_i386_dyn_relocs *p;
1750 if (h->root.type == bfd_link_hash_warning)
1751 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1753 eh = (struct elf_i386_link_hash_entry *) h;
1754 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1756 asection *s = p->sec->output_section;
1758 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1760 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1762 info->flags |= DF_TEXTREL;
1764 /* Not an error, just cut short the traversal. */
1771 /* Set the sizes of the dynamic sections. */
1774 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1775 struct bfd_link_info *info)
1777 struct elf_i386_link_hash_table *htab;
1783 htab = elf_i386_hash_table (info);
1784 dynobj = htab->elf.dynobj;
1788 if (htab->elf.dynamic_sections_created)
1790 /* Set the contents of the .interp section to the interpreter. */
1791 if (info->executable)
1793 s = bfd_get_section_by_name (dynobj, ".interp");
1796 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1797 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1801 /* Set up .got offsets for local syms, and space for local dynamic
1803 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1805 bfd_signed_vma *local_got;
1806 bfd_signed_vma *end_local_got;
1807 char *local_tls_type;
1808 bfd_size_type locsymcount;
1809 Elf_Internal_Shdr *symtab_hdr;
1812 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1815 for (s = ibfd->sections; s != NULL; s = s->next)
1817 struct elf_i386_dyn_relocs *p;
1819 for (p = *((struct elf_i386_dyn_relocs **)
1820 &elf_section_data (s)->local_dynrel);
1824 if (!bfd_is_abs_section (p->sec)
1825 && bfd_is_abs_section (p->sec->output_section))
1827 /* Input section has been discarded, either because
1828 it is a copy of a linkonce section or due to
1829 linker script /DISCARD/, so we'll be discarding
1832 else if (p->count != 0)
1834 srel = elf_section_data (p->sec)->sreloc;
1835 srel->size += p->count * sizeof (Elf32_External_Rel);
1836 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1837 info->flags |= DF_TEXTREL;
1842 local_got = elf_local_got_refcounts (ibfd);
1846 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1847 locsymcount = symtab_hdr->sh_info;
1848 end_local_got = local_got + locsymcount;
1849 local_tls_type = elf_i386_local_got_tls_type (ibfd);
1851 srel = htab->srelgot;
1852 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1856 *local_got = s->size;
1858 if (*local_tls_type == GOT_TLS_GD
1859 || *local_tls_type == GOT_TLS_IE_BOTH)
1862 || *local_tls_type == GOT_TLS_GD
1863 || (*local_tls_type & GOT_TLS_IE))
1865 if (*local_tls_type == GOT_TLS_IE_BOTH)
1866 srel->size += 2 * sizeof (Elf32_External_Rel);
1868 srel->size += sizeof (Elf32_External_Rel);
1872 *local_got = (bfd_vma) -1;
1876 if (htab->tls_ldm_got.refcount > 0)
1878 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1880 htab->tls_ldm_got.offset = htab->sgot->size;
1881 htab->sgot->size += 8;
1882 htab->srelgot->size += sizeof (Elf32_External_Rel);
1885 htab->tls_ldm_got.offset = -1;
1887 if (htab->is_vxworks)
1889 /* Save the GOT and PLT symbols in the hash table for easy access.
1890 Mark them as having relocations; they might not, but we won't
1891 know for sure until we build the GOT in finish_dynamic_symbol. */
1893 htab->hgot = elf_link_hash_lookup (elf_hash_table (info),
1894 "_GLOBAL_OFFSET_TABLE_",
1895 FALSE, FALSE, FALSE);
1897 htab->hgot->indx = -2;
1898 htab->hplt = elf_link_hash_lookup (elf_hash_table (info),
1899 "_PROCEDURE_LINKAGE_TABLE_",
1900 FALSE, FALSE, FALSE);
1902 htab->hplt->indx = -2;
1904 if (htab->is_vxworks && htab->hplt && htab->splt->flags & SEC_CODE)
1905 htab->hplt->type = STT_FUNC;
1908 /* Allocate global sym .plt and .got entries, and space for global
1909 sym dynamic relocs. */
1910 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1912 /* We now have determined the sizes of the various dynamic sections.
1913 Allocate memory for them. */
1915 for (s = dynobj->sections; s != NULL; s = s->next)
1917 bfd_boolean strip_section = TRUE;
1919 if ((s->flags & SEC_LINKER_CREATED) == 0)
1924 || s == htab->sgotplt
1925 || s == htab->sdynbss)
1927 /* Strip this section if we don't need it; see the
1929 /* We'd like to strip these sections if they aren't needed, but if
1930 we've exported dynamic symbols from them we must leave them.
1931 It's too late to tell BFD to get rid of the symbols. */
1933 if (htab->hplt != NULL)
1934 strip_section = FALSE;
1936 else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0)
1938 if (s->size != 0 && s != htab->srelplt && s != htab->srelplt2)
1941 /* We use the reloc_count field as a counter if we need
1942 to copy relocs into the output file. */
1947 /* It's not one of our sections, so don't allocate space. */
1953 /* If we don't need this section, strip it from the
1954 output file. This is mostly to handle .rel.bss and
1955 .rel.plt. We must create both sections in
1956 create_dynamic_sections, because they must be created
1957 before the linker maps input sections to output
1958 sections. The linker does that before
1959 adjust_dynamic_symbol is called, and it is that
1960 function which decides whether anything needs to go
1961 into these sections. */
1963 s->flags |= SEC_EXCLUDE;
1967 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1970 /* Allocate memory for the section contents. We use bfd_zalloc
1971 here in case unused entries are not reclaimed before the
1972 section's contents are written out. This should not happen,
1973 but this way if it does, we get a R_386_NONE reloc instead
1975 s->contents = bfd_zalloc (dynobj, s->size);
1976 if (s->contents == NULL)
1980 if (htab->elf.dynamic_sections_created)
1982 /* Add some entries to the .dynamic section. We fill in the
1983 values later, in elf_i386_finish_dynamic_sections, but we
1984 must add the entries now so that we get the correct size for
1985 the .dynamic section. The DT_DEBUG entry is filled in by the
1986 dynamic linker and used by the debugger. */
1987 #define add_dynamic_entry(TAG, VAL) \
1988 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1990 if (info->executable)
1992 if (!add_dynamic_entry (DT_DEBUG, 0))
1996 if (htab->splt->size != 0)
1998 if (!add_dynamic_entry (DT_PLTGOT, 0)
1999 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2000 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2001 || !add_dynamic_entry (DT_JMPREL, 0))
2007 if (!add_dynamic_entry (DT_REL, 0)
2008 || !add_dynamic_entry (DT_RELSZ, 0)
2009 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2012 /* If any dynamic relocs apply to a read-only section,
2013 then we need a DT_TEXTREL entry. */
2014 if ((info->flags & DF_TEXTREL) == 0)
2015 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2018 if ((info->flags & DF_TEXTREL) != 0)
2020 if (!add_dynamic_entry (DT_TEXTREL, 0))
2025 #undef add_dynamic_entry
2030 /* Set the correct type for an x86 ELF section. We do this by the
2031 section name, which is a hack, but ought to work. */
2034 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2035 Elf_Internal_Shdr *hdr,
2038 register const char *name;
2040 name = bfd_get_section_name (abfd, sec);
2042 /* This is an ugly, but unfortunately necessary hack that is
2043 needed when producing EFI binaries on x86. It tells
2044 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2045 containing ELF relocation info. We need this hack in order to
2046 be able to generate ELF binaries that can be translated into
2047 EFI applications (which are essentially COFF objects). Those
2048 files contain a COFF ".reloc" section inside an ELFNN object,
2049 which would normally cause BFD to segfault because it would
2050 attempt to interpret this section as containing relocation
2051 entries for section "oc". With this hack enabled, ".reloc"
2052 will be treated as a normal data section, which will avoid the
2053 segfault. However, you won't be able to create an ELFNN binary
2054 with a section named "oc" that needs relocations, but that's
2055 the kind of ugly side-effects you get when detecting section
2056 types based on their names... In practice, this limitation is
2057 unlikely to bite. */
2058 if (strcmp (name, ".reloc") == 0)
2059 hdr->sh_type = SHT_PROGBITS;
2064 /* Return the base VMA address which should be subtracted from real addresses
2065 when resolving @dtpoff relocation.
2066 This is PT_TLS segment p_vaddr. */
2069 dtpoff_base (struct bfd_link_info *info)
2071 /* If tls_sec is NULL, we should have signalled an error already. */
2072 if (elf_hash_table (info)->tls_sec == NULL)
2074 return elf_hash_table (info)->tls_sec->vma;
2077 /* Return the relocation value for @tpoff relocation
2078 if STT_TLS virtual address is ADDRESS. */
2081 tpoff (struct bfd_link_info *info, bfd_vma address)
2083 struct elf_link_hash_table *htab = elf_hash_table (info);
2085 /* If tls_sec is NULL, we should have signalled an error already. */
2086 if (htab->tls_sec == NULL)
2088 return htab->tls_size + htab->tls_sec->vma - address;
2091 /* Relocate an i386 ELF section. */
2094 elf_i386_relocate_section (bfd *output_bfd,
2095 struct bfd_link_info *info,
2097 asection *input_section,
2099 Elf_Internal_Rela *relocs,
2100 Elf_Internal_Sym *local_syms,
2101 asection **local_sections)
2103 struct elf_i386_link_hash_table *htab;
2104 Elf_Internal_Shdr *symtab_hdr;
2105 struct elf_link_hash_entry **sym_hashes;
2106 bfd_vma *local_got_offsets;
2107 Elf_Internal_Rela *rel;
2108 Elf_Internal_Rela *relend;
2110 htab = elf_i386_hash_table (info);
2111 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2112 sym_hashes = elf_sym_hashes (input_bfd);
2113 local_got_offsets = elf_local_got_offsets (input_bfd);
2116 relend = relocs + input_section->reloc_count;
2117 for (; rel < relend; rel++)
2119 unsigned int r_type;
2120 reloc_howto_type *howto;
2121 unsigned long r_symndx;
2122 struct elf_link_hash_entry *h;
2123 Elf_Internal_Sym *sym;
2127 bfd_boolean unresolved_reloc;
2128 bfd_reloc_status_type r;
2132 r_type = ELF32_R_TYPE (rel->r_info);
2133 if (r_type == R_386_GNU_VTINHERIT
2134 || r_type == R_386_GNU_VTENTRY)
2137 if ((indx = r_type) >= R_386_standard
2138 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2139 >= R_386_ext - R_386_standard)
2140 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2141 >= R_386_tls - R_386_ext))
2143 (*_bfd_error_handler)
2144 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2145 input_bfd, input_section, r_type);
2146 bfd_set_error (bfd_error_bad_value);
2149 howto = elf_howto_table + indx;
2151 r_symndx = ELF32_R_SYM (rel->r_info);
2153 if (info->relocatable)
2158 /* This is a relocatable link. We don't have to change
2159 anything, unless the reloc is against a section symbol,
2160 in which case we have to adjust according to where the
2161 section symbol winds up in the output section. */
2162 if (r_symndx >= symtab_hdr->sh_info)
2165 sym = local_syms + r_symndx;
2166 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2169 sec = local_sections[r_symndx];
2170 val = sec->output_offset;
2174 where = contents + rel->r_offset;
2175 switch (howto->size)
2177 /* FIXME: overflow checks. */
2179 val += bfd_get_8 (input_bfd, where);
2180 bfd_put_8 (input_bfd, val, where);
2183 val += bfd_get_16 (input_bfd, where);
2184 bfd_put_16 (input_bfd, val, where);
2187 val += bfd_get_32 (input_bfd, where);
2188 bfd_put_32 (input_bfd, val, where);
2196 /* This is a final link. */
2200 unresolved_reloc = FALSE;
2201 if (r_symndx < symtab_hdr->sh_info)
2203 sym = local_syms + r_symndx;
2204 sec = local_sections[r_symndx];
2205 relocation = (sec->output_section->vma
2206 + sec->output_offset
2208 if ((sec->flags & SEC_MERGE)
2209 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2213 bfd_byte *where = contents + rel->r_offset;
2215 switch (howto->size)
2218 addend = bfd_get_8 (input_bfd, where);
2219 if (howto->pc_relative)
2221 addend = (addend ^ 0x80) - 0x80;
2226 addend = bfd_get_16 (input_bfd, where);
2227 if (howto->pc_relative)
2229 addend = (addend ^ 0x8000) - 0x8000;
2234 addend = bfd_get_32 (input_bfd, where);
2235 if (howto->pc_relative)
2237 addend = (addend ^ 0x80000000) - 0x80000000;
2246 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend);
2247 addend -= relocation;
2248 addend += msec->output_section->vma + msec->output_offset;
2250 switch (howto->size)
2253 /* FIXME: overflow checks. */
2254 if (howto->pc_relative)
2256 bfd_put_8 (input_bfd, addend, where);
2259 if (howto->pc_relative)
2261 bfd_put_16 (input_bfd, addend, where);
2264 if (howto->pc_relative)
2266 bfd_put_32 (input_bfd, addend, where);
2275 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2276 r_symndx, symtab_hdr, sym_hashes,
2278 unresolved_reloc, warned);
2283 /* r_symndx will be zero only for relocs against symbols from
2284 removed linkonce sections, or sections discarded by a linker
2285 script. For these relocs, we just want the section contents
2286 zeroed. Avoid any special processing in the switch below. */
2287 r_type = R_386_NONE;
2290 if (howto->pc_relative)
2291 relocation = (input_section->output_section->vma
2292 + input_section->output_offset
2299 /* Relocation is to the entry for this symbol in the global
2301 if (htab->sgot == NULL)
2308 off = h->got.offset;
2309 dyn = htab->elf.dynamic_sections_created;
2310 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2312 && SYMBOL_REFERENCES_LOCAL (info, h))
2313 || (ELF_ST_VISIBILITY (h->other)
2314 && h->root.type == bfd_link_hash_undefweak))
2316 /* This is actually a static link, or it is a
2317 -Bsymbolic link and the symbol is defined
2318 locally, or the symbol was forced to be local
2319 because of a version file. We must initialize
2320 this entry in the global offset table. Since the
2321 offset must always be a multiple of 4, we use the
2322 least significant bit to record whether we have
2323 initialized it already.
2325 When doing a dynamic link, we create a .rel.got
2326 relocation entry to initialize the value. This
2327 is done in the finish_dynamic_symbol routine. */
2332 bfd_put_32 (output_bfd, relocation,
2333 htab->sgot->contents + off);
2338 unresolved_reloc = FALSE;
2342 if (local_got_offsets == NULL)
2345 off = local_got_offsets[r_symndx];
2347 /* The offset must always be a multiple of 4. We use
2348 the least significant bit to record whether we have
2349 already generated the necessary reloc. */
2354 bfd_put_32 (output_bfd, relocation,
2355 htab->sgot->contents + off);
2360 Elf_Internal_Rela outrel;
2367 outrel.r_offset = (htab->sgot->output_section->vma
2368 + htab->sgot->output_offset
2370 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2372 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
2373 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2376 local_got_offsets[r_symndx] |= 1;
2380 if (off >= (bfd_vma) -2)
2383 relocation = htab->sgot->output_section->vma
2384 + htab->sgot->output_offset + off
2385 - htab->sgotplt->output_section->vma
2386 - htab->sgotplt->output_offset;
2390 /* Relocation is relative to the start of the global offset
2393 /* Check to make sure it isn't a protected function symbol
2394 for shared library since it may not be local when used
2395 as function address. */
2397 && !info->executable
2400 && h->type == STT_FUNC
2401 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2403 (*_bfd_error_handler)
2404 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2405 input_bfd, h->root.root.string);
2406 bfd_set_error (bfd_error_bad_value);
2410 /* Note that sgot is not involved in this
2411 calculation. We always want the start of .got.plt. If we
2412 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2413 permitted by the ABI, we might have to change this
2415 relocation -= htab->sgotplt->output_section->vma
2416 + htab->sgotplt->output_offset;
2420 /* Use global offset table as symbol value. */
2421 relocation = htab->sgotplt->output_section->vma
2422 + htab->sgotplt->output_offset;
2423 unresolved_reloc = FALSE;
2427 /* Relocation is to the entry for this symbol in the
2428 procedure linkage table. */
2430 /* Resolve a PLT32 reloc against a local symbol directly,
2431 without using the procedure linkage table. */
2435 if (h->plt.offset == (bfd_vma) -1
2436 || htab->splt == NULL)
2438 /* We didn't make a PLT entry for this symbol. This
2439 happens when statically linking PIC code, or when
2440 using -Bsymbolic. */
2444 relocation = (htab->splt->output_section->vma
2445 + htab->splt->output_offset
2447 unresolved_reloc = FALSE;
2452 if ((input_section->flags & SEC_ALLOC) == 0)
2457 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2458 || h->root.type != bfd_link_hash_undefweak)
2459 && (r_type != R_386_PC32
2460 || !SYMBOL_CALLS_LOCAL (info, h)))
2461 || (ELIMINATE_COPY_RELOCS
2468 || h->root.type == bfd_link_hash_undefweak
2469 || h->root.type == bfd_link_hash_undefined)))
2471 Elf_Internal_Rela outrel;
2473 bfd_boolean skip, relocate;
2476 /* When generating a shared object, these relocations
2477 are copied into the output file to be resolved at run
2484 _bfd_elf_section_offset (output_bfd, info, input_section,
2486 if (outrel.r_offset == (bfd_vma) -1)
2488 else if (outrel.r_offset == (bfd_vma) -2)
2489 skip = TRUE, relocate = TRUE;
2490 outrel.r_offset += (input_section->output_section->vma
2491 + input_section->output_offset);
2494 memset (&outrel, 0, sizeof outrel);
2497 && (r_type == R_386_PC32
2500 || !h->def_regular))
2501 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2504 /* This symbol is local, or marked to become local. */
2506 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2509 sreloc = elf_section_data (input_section)->sreloc;
2513 loc = sreloc->contents;
2514 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2515 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2517 /* If this reloc is against an external symbol, we do
2518 not want to fiddle with the addend. Otherwise, we
2519 need to include the symbol value so that it becomes
2520 an addend for the dynamic reloc. */
2529 Elf_Internal_Rela outrel;
2533 outrel.r_offset = rel->r_offset
2534 + input_section->output_section->vma
2535 + input_section->output_offset;
2536 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2537 sreloc = elf_section_data (input_section)->sreloc;
2540 loc = sreloc->contents;
2541 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2542 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2547 case R_386_TLS_IE_32:
2548 case R_386_TLS_GOTIE:
2549 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
2550 tls_type = GOT_UNKNOWN;
2551 if (h == NULL && local_got_offsets)
2552 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
2555 tls_type = elf_i386_hash_entry(h)->tls_type;
2556 if (!info->shared && h->dynindx == -1 && (tls_type & GOT_TLS_IE))
2557 r_type = R_386_TLS_LE_32;
2559 if (tls_type == GOT_TLS_IE)
2560 tls_type = GOT_TLS_IE_NEG;
2561 if (r_type == R_386_TLS_GD)
2563 if (tls_type == GOT_TLS_IE_POS)
2564 r_type = R_386_TLS_GOTIE;
2565 else if (tls_type & GOT_TLS_IE)
2566 r_type = R_386_TLS_IE_32;
2569 if (r_type == R_386_TLS_LE_32)
2571 BFD_ASSERT (! unresolved_reloc);
2572 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
2574 unsigned int val, type;
2577 /* GD->LE transition. */
2578 BFD_ASSERT (rel->r_offset >= 2);
2579 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2580 BFD_ASSERT (type == 0x8d || type == 0x04);
2581 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
2582 BFD_ASSERT (bfd_get_8 (input_bfd,
2583 contents + rel->r_offset + 4)
2585 BFD_ASSERT (rel + 1 < relend);
2586 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2587 roff = rel->r_offset + 5;
2588 val = bfd_get_8 (input_bfd,
2589 contents + rel->r_offset - 1);
2592 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2594 movl %gs:0, %eax; subl $foo@tpoff, %eax
2595 (6 byte form of subl). */
2596 BFD_ASSERT (rel->r_offset >= 3);
2597 BFD_ASSERT (bfd_get_8 (input_bfd,
2598 contents + rel->r_offset - 3)
2600 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2601 memcpy (contents + rel->r_offset - 3,
2602 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2606 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2607 if (rel->r_offset + 10 <= input_section->size
2608 && bfd_get_8 (input_bfd,
2609 contents + rel->r_offset + 9) == 0x90)
2611 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2613 movl %gs:0, %eax; subl $foo@tpoff, %eax
2614 (6 byte form of subl). */
2615 memcpy (contents + rel->r_offset - 2,
2616 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2617 roff = rel->r_offset + 6;
2621 /* leal foo(%reg), %eax; call ___tls_get_addr
2623 movl %gs:0, %eax; subl $foo@tpoff, %eax
2624 (5 byte form of subl). */
2625 memcpy (contents + rel->r_offset - 2,
2626 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2629 bfd_put_32 (output_bfd, tpoff (info, relocation),
2631 /* Skip R_386_PLT32. */
2635 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
2637 unsigned int val, type;
2639 /* IE->LE transition:
2640 Originally it can be one of:
2648 BFD_ASSERT (rel->r_offset >= 1);
2649 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2650 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
2653 /* movl foo, %eax. */
2654 bfd_put_8 (output_bfd, 0xb8,
2655 contents + rel->r_offset - 1);
2659 BFD_ASSERT (rel->r_offset >= 2);
2660 type = bfd_get_8 (input_bfd,
2661 contents + rel->r_offset - 2);
2666 BFD_ASSERT ((val & 0xc7) == 0x05);
2667 bfd_put_8 (output_bfd, 0xc7,
2668 contents + rel->r_offset - 2);
2669 bfd_put_8 (output_bfd,
2670 0xc0 | ((val >> 3) & 7),
2671 contents + rel->r_offset - 1);
2675 BFD_ASSERT ((val & 0xc7) == 0x05);
2676 bfd_put_8 (output_bfd, 0x81,
2677 contents + rel->r_offset - 2);
2678 bfd_put_8 (output_bfd,
2679 0xc0 | ((val >> 3) & 7),
2680 contents + rel->r_offset - 1);
2687 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2688 contents + rel->r_offset);
2693 unsigned int val, type;
2695 /* {IE_32,GOTIE}->LE transition:
2696 Originally it can be one of:
2697 subl foo(%reg1), %reg2
2698 movl foo(%reg1), %reg2
2699 addl foo(%reg1), %reg2
2702 movl $foo, %reg2 (6 byte form)
2703 addl $foo, %reg2. */
2704 BFD_ASSERT (rel->r_offset >= 2);
2705 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2706 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2707 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
2708 BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4);
2712 bfd_put_8 (output_bfd, 0xc7,
2713 contents + rel->r_offset - 2);
2714 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2715 contents + rel->r_offset - 1);
2717 else if (type == 0x2b)
2720 bfd_put_8 (output_bfd, 0x81,
2721 contents + rel->r_offset - 2);
2722 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2723 contents + rel->r_offset - 1);
2725 else if (type == 0x03)
2728 bfd_put_8 (output_bfd, 0x81,
2729 contents + rel->r_offset - 2);
2730 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2731 contents + rel->r_offset - 1);
2735 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
2736 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2737 contents + rel->r_offset);
2739 bfd_put_32 (output_bfd, tpoff (info, relocation),
2740 contents + rel->r_offset);
2745 if (htab->sgot == NULL)
2749 off = h->got.offset;
2752 if (local_got_offsets == NULL)
2755 off = local_got_offsets[r_symndx];
2762 Elf_Internal_Rela outrel;
2766 if (htab->srelgot == NULL)
2769 outrel.r_offset = (htab->sgot->output_section->vma
2770 + htab->sgot->output_offset + off);
2772 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2773 if (r_type == R_386_TLS_GD)
2774 dr_type = R_386_TLS_DTPMOD32;
2775 else if (tls_type == GOT_TLS_IE_POS)
2776 dr_type = R_386_TLS_TPOFF;
2778 dr_type = R_386_TLS_TPOFF32;
2779 if (dr_type == R_386_TLS_TPOFF && indx == 0)
2780 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
2781 htab->sgot->contents + off);
2782 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
2783 bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
2784 htab->sgot->contents + off);
2786 bfd_put_32 (output_bfd, 0,
2787 htab->sgot->contents + off);
2788 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2789 loc = htab->srelgot->contents;
2790 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2791 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2793 if (r_type == R_386_TLS_GD)
2797 BFD_ASSERT (! unresolved_reloc);
2798 bfd_put_32 (output_bfd,
2799 relocation - dtpoff_base (info),
2800 htab->sgot->contents + off + 4);
2804 bfd_put_32 (output_bfd, 0,
2805 htab->sgot->contents + off + 4);
2806 outrel.r_info = ELF32_R_INFO (indx,
2807 R_386_TLS_DTPOFF32);
2808 outrel.r_offset += 4;
2809 htab->srelgot->reloc_count++;
2810 loc += sizeof (Elf32_External_Rel);
2811 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2814 else if (tls_type == GOT_TLS_IE_BOTH)
2816 bfd_put_32 (output_bfd,
2817 indx == 0 ? relocation - dtpoff_base (info) : 0,
2818 htab->sgot->contents + off + 4);
2819 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
2820 outrel.r_offset += 4;
2821 htab->srelgot->reloc_count++;
2822 loc += sizeof (Elf32_External_Rel);
2823 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2829 local_got_offsets[r_symndx] |= 1;
2832 if (off >= (bfd_vma) -2)
2834 if (r_type == ELF32_R_TYPE (rel->r_info))
2836 bfd_vma g_o_t = htab->sgotplt->output_section->vma
2837 + htab->sgotplt->output_offset;
2838 relocation = htab->sgot->output_section->vma
2839 + htab->sgot->output_offset + off - g_o_t;
2840 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
2841 && tls_type == GOT_TLS_IE_BOTH)
2843 if (r_type == R_386_TLS_IE)
2844 relocation += g_o_t;
2845 unresolved_reloc = FALSE;
2849 unsigned int val, type;
2852 /* GD->IE transition. */
2853 BFD_ASSERT (rel->r_offset >= 2);
2854 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2855 BFD_ASSERT (type == 0x8d || type == 0x04);
2856 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
2857 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2859 BFD_ASSERT (rel + 1 < relend);
2860 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2861 roff = rel->r_offset - 3;
2862 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2865 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2867 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2868 BFD_ASSERT (rel->r_offset >= 3);
2869 BFD_ASSERT (bfd_get_8 (input_bfd,
2870 contents + rel->r_offset - 3)
2872 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2877 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2879 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2880 BFD_ASSERT (rel->r_offset + 10 <= input_section->size);
2881 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2882 BFD_ASSERT (bfd_get_8 (input_bfd,
2883 contents + rel->r_offset + 9)
2885 roff = rel->r_offset - 2;
2887 memcpy (contents + roff,
2888 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
2889 contents[roff + 7] = 0x80 | (val & 7);
2890 /* If foo is used only with foo@gotntpoff(%reg) and
2891 foo@indntpoff, but not with foo@gottpoff(%reg), change
2892 subl $foo@gottpoff(%reg), %eax
2894 addl $foo@gotntpoff(%reg), %eax. */
2895 if (r_type == R_386_TLS_GOTIE)
2897 contents[roff + 6] = 0x03;
2898 if (tls_type == GOT_TLS_IE_BOTH)
2901 bfd_put_32 (output_bfd,
2902 htab->sgot->output_section->vma
2903 + htab->sgot->output_offset + off
2904 - htab->sgotplt->output_section->vma
2905 - htab->sgotplt->output_offset,
2906 contents + roff + 8);
2907 /* Skip R_386_PLT32. */
2918 /* LD->LE transition:
2920 leal foo(%reg), %eax; call ___tls_get_addr.
2922 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
2923 BFD_ASSERT (rel->r_offset >= 2);
2924 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
2926 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2927 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2928 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
2929 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2931 BFD_ASSERT (rel + 1 < relend);
2932 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2933 memcpy (contents + rel->r_offset - 2,
2934 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
2935 /* Skip R_386_PLT32. */
2940 if (htab->sgot == NULL)
2943 off = htab->tls_ldm_got.offset;
2948 Elf_Internal_Rela outrel;
2951 if (htab->srelgot == NULL)
2954 outrel.r_offset = (htab->sgot->output_section->vma
2955 + htab->sgot->output_offset + off);
2957 bfd_put_32 (output_bfd, 0,
2958 htab->sgot->contents + off);
2959 bfd_put_32 (output_bfd, 0,
2960 htab->sgot->contents + off + 4);
2961 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
2962 loc = htab->srelgot->contents;
2963 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2964 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2965 htab->tls_ldm_got.offset |= 1;
2967 relocation = htab->sgot->output_section->vma
2968 + htab->sgot->output_offset + off
2969 - htab->sgotplt->output_section->vma
2970 - htab->sgotplt->output_offset;
2971 unresolved_reloc = FALSE;
2974 case R_386_TLS_LDO_32:
2975 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2976 relocation -= dtpoff_base (info);
2978 /* When converting LDO to LE, we must negate. */
2979 relocation = -tpoff (info, relocation);
2982 case R_386_TLS_LE_32:
2986 Elf_Internal_Rela outrel;
2991 outrel.r_offset = rel->r_offset
2992 + input_section->output_section->vma
2993 + input_section->output_offset;
2994 if (h != NULL && h->dynindx != -1)
2998 if (r_type == R_386_TLS_LE_32)
2999 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3001 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3002 sreloc = elf_section_data (input_section)->sreloc;
3005 loc = sreloc->contents;
3006 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3007 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3010 else if (r_type == R_386_TLS_LE_32)
3011 relocation = dtpoff_base (info) - relocation;
3013 relocation -= dtpoff_base (info);
3015 else if (r_type == R_386_TLS_LE_32)
3016 relocation = tpoff (info, relocation);
3018 relocation = -tpoff (info, relocation);
3025 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3026 because such sections are not SEC_ALLOC and thus ld.so will
3027 not process them. */
3028 if (unresolved_reloc
3029 && !((input_section->flags & SEC_DEBUGGING) != 0
3032 (*_bfd_error_handler)
3033 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3036 (long) rel->r_offset,
3037 h->root.root.string);
3041 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3042 contents, rel->r_offset,
3045 if (r != bfd_reloc_ok)
3050 name = h->root.root.string;
3053 name = bfd_elf_string_from_elf_section (input_bfd,
3054 symtab_hdr->sh_link,
3059 name = bfd_section_name (input_bfd, sec);
3062 if (r == bfd_reloc_overflow)
3064 if (! ((*info->callbacks->reloc_overflow)
3065 (info, (h ? &h->root : NULL), name, howto->name,
3066 (bfd_vma) 0, input_bfd, input_section,
3072 (*_bfd_error_handler)
3073 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3074 input_bfd, input_section,
3075 (long) rel->r_offset, name, (int) r);
3084 /* Finish up dynamic symbol handling. We set the contents of various
3085 dynamic sections here. */
3088 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3089 struct bfd_link_info *info,
3090 struct elf_link_hash_entry *h,
3091 Elf_Internal_Sym *sym)
3093 struct elf_i386_link_hash_table *htab;
3095 htab = elf_i386_hash_table (info);
3097 if (h->plt.offset != (bfd_vma) -1)
3101 Elf_Internal_Rela rel;
3104 /* This symbol has an entry in the procedure linkage table. Set
3107 if (h->dynindx == -1
3108 || htab->splt == NULL
3109 || htab->sgotplt == NULL
3110 || htab->srelplt == NULL)
3113 /* Get the index in the procedure linkage table which
3114 corresponds to this symbol. This is the index of this symbol
3115 in all the symbols for which we are making plt entries. The
3116 first entry in the procedure linkage table is reserved. */
3117 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3119 /* Get the offset into the .got table of the entry that
3120 corresponds to this function. Each .got entry is 4 bytes.
3121 The first three are reserved. */
3122 got_offset = (plt_index + 3) * 4;
3124 /* Fill in the entry in the procedure linkage table. */
3127 memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
3129 bfd_put_32 (output_bfd,
3130 (htab->sgotplt->output_section->vma
3131 + htab->sgotplt->output_offset
3133 htab->splt->contents + h->plt.offset + 2);
3135 if (htab->is_vxworks)
3137 int s, k, reloc_index;
3139 /* Create the R_386_32 relocation referencing the GOT
3140 for this PLT entry. */
3142 /* S: Current slot number (zero-based). */
3143 s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3144 /* K: Number of relocations for PLTResolve. */
3146 k = PLTRESOLVE_RELOCS_SHLIB;
3148 k = PLTRESOLVE_RELOCS;
3149 /* Skip the PLTresolve relocations, and the relocations for
3150 the other PLT slots. */
3151 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3152 loc = (htab->srelplt2->contents + reloc_index
3153 * sizeof (Elf32_External_Rel));
3155 rel.r_offset = (htab->splt->output_section->vma
3156 + htab->splt->output_offset
3157 + h->plt.offset + 2),
3158 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_386_32);
3159 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3161 /* Create the R_386_32 relocation referencing the beginning of
3162 the PLT for this GOT entry. */
3163 rel.r_offset = (htab->sgotplt->output_section->vma
3164 + htab->sgotplt->output_offset
3166 rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_386_32);
3167 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3168 loc + sizeof (Elf32_External_Rel));
3173 memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
3175 bfd_put_32 (output_bfd, got_offset,
3176 htab->splt->contents + h->plt.offset + 2);
3179 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
3180 htab->splt->contents + h->plt.offset + 7);
3181 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
3182 htab->splt->contents + h->plt.offset + 12);
3184 /* Fill in the entry in the global offset table. */
3185 bfd_put_32 (output_bfd,
3186 (htab->splt->output_section->vma
3187 + htab->splt->output_offset
3190 htab->sgotplt->contents + got_offset);
3192 /* Fill in the entry in the .rel.plt section. */
3193 rel.r_offset = (htab->sgotplt->output_section->vma
3194 + htab->sgotplt->output_offset
3196 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3197 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
3198 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3200 if (!h->def_regular)
3202 /* Mark the symbol as undefined, rather than as defined in
3203 the .plt section. Leave the value if there were any
3204 relocations where pointer equality matters (this is a clue
3205 for the dynamic linker, to make function pointer
3206 comparisons work between an application and shared
3207 library), otherwise set it to zero. If a function is only
3208 called from a binary, there is no need to slow down
3209 shared libraries because of that. */
3210 sym->st_shndx = SHN_UNDEF;
3211 if (!h->pointer_equality_needed)
3216 if (h->got.offset != (bfd_vma) -1
3217 && elf_i386_hash_entry(h)->tls_type != GOT_TLS_GD
3218 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
3220 Elf_Internal_Rela rel;
3223 /* This symbol has an entry in the global offset table. Set it
3226 if (htab->sgot == NULL || htab->srelgot == NULL)
3229 rel.r_offset = (htab->sgot->output_section->vma
3230 + htab->sgot->output_offset
3231 + (h->got.offset & ~(bfd_vma) 1));
3233 /* If this is a static link, or it is a -Bsymbolic link and the
3234 symbol is defined locally or was forced to be local because
3235 of a version file, we just want to emit a RELATIVE reloc.
3236 The entry in the global offset table will already have been
3237 initialized in the relocate_section function. */
3239 && SYMBOL_REFERENCES_LOCAL (info, h))
3241 BFD_ASSERT((h->got.offset & 1) != 0);
3242 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3246 BFD_ASSERT((h->got.offset & 1) == 0);
3247 bfd_put_32 (output_bfd, (bfd_vma) 0,
3248 htab->sgot->contents + h->got.offset);
3249 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3252 loc = htab->srelgot->contents;
3253 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3254 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3259 Elf_Internal_Rela rel;
3262 /* This symbol needs a copy reloc. Set it up. */
3264 if (h->dynindx == -1
3265 || (h->root.type != bfd_link_hash_defined
3266 && h->root.type != bfd_link_hash_defweak)
3267 || htab->srelbss == NULL)
3270 rel.r_offset = (h->root.u.def.value
3271 + h->root.u.def.section->output_section->vma
3272 + h->root.u.def.section->output_offset);
3273 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3274 loc = htab->srelbss->contents;
3275 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
3276 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3279 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3280 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3281 is relative to the ".got" section. */
3282 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3283 || (strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3284 && !htab->is_vxworks))
3285 sym->st_shndx = SHN_ABS;
3290 /* Used to decide how to sort relocs in an optimal manner for the
3291 dynamic linker, before writing them out. */
3293 static enum elf_reloc_type_class
3294 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
3296 switch (ELF32_R_TYPE (rela->r_info))
3298 case R_386_RELATIVE:
3299 return reloc_class_relative;
3300 case R_386_JUMP_SLOT:
3301 return reloc_class_plt;
3303 return reloc_class_copy;
3305 return reloc_class_normal;
3309 /* Finish up the dynamic sections. */
3312 elf_i386_finish_dynamic_sections (bfd *output_bfd,
3313 struct bfd_link_info *info)
3315 struct elf_i386_link_hash_table *htab;
3319 htab = elf_i386_hash_table (info);
3320 dynobj = htab->elf.dynobj;
3321 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3323 if (htab->elf.dynamic_sections_created)
3325 Elf32_External_Dyn *dyncon, *dynconend;
3327 if (sdyn == NULL || htab->sgot == NULL)
3330 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3331 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3332 for (; dyncon < dynconend; dyncon++)
3334 Elf_Internal_Dyn dyn;
3337 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3346 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3351 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3356 dyn.d_un.d_val = s->size;
3360 /* My reading of the SVR4 ABI indicates that the
3361 procedure linkage table relocs (DT_JMPREL) should be
3362 included in the overall relocs (DT_REL). This is
3363 what Solaris does. However, UnixWare can not handle
3364 that case. Therefore, we override the DT_RELSZ entry
3365 here to make it not include the JMPREL relocs. */
3369 dyn.d_un.d_val -= s->size;
3373 /* We may not be using the standard ELF linker script.
3374 If .rel.plt is the first .rel section, we adjust
3375 DT_REL to not include it. */
3379 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
3381 dyn.d_un.d_ptr += s->size;
3385 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3388 /* Fill in the first entry in the procedure linkage table. */
3389 if (htab->splt && htab->splt->size > 0)
3393 memcpy (htab->splt->contents, elf_i386_pic_plt0_entry,
3394 sizeof (elf_i386_pic_plt0_entry));
3395 memset (htab->splt->contents + sizeof (elf_i386_pic_plt0_entry),
3396 htab->plt0_pad_byte,
3397 PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
3401 memcpy (htab->splt->contents, elf_i386_plt0_entry,
3402 sizeof(elf_i386_plt0_entry));
3403 memset (htab->splt->contents + sizeof (elf_i386_plt0_entry),
3404 htab->plt0_pad_byte,
3405 PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
3406 bfd_put_32 (output_bfd,
3407 (htab->sgotplt->output_section->vma
3408 + htab->sgotplt->output_offset
3410 htab->splt->contents + 2);
3411 bfd_put_32 (output_bfd,
3412 (htab->sgotplt->output_section->vma
3413 + htab->sgotplt->output_offset
3415 htab->splt->contents + 8);
3417 if (htab->is_vxworks)
3419 Elf_Internal_Rela rel;
3420 struct elf_link_hash_entry *hgot;
3422 /* The VxWorks GOT is relocated by the dynamic linker.
3423 Therefore, we must emit relocations rather than
3424 simply computing the values now. */
3425 hgot = elf_link_hash_lookup (elf_hash_table (info),
3426 "_GLOBAL_OFFSET_TABLE_",
3427 FALSE, FALSE, FALSE);
3428 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3429 On IA32 we use REL relocations so the addend goes in
3430 the PLT directly. */
3431 rel.r_offset = (htab->splt->output_section->vma
3432 + htab->splt->output_offset
3434 rel.r_info = ELF32_R_INFO (hgot->indx, R_386_32);
3435 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3436 htab->srelplt2->contents);
3437 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3438 rel.r_offset = (htab->splt->output_section->vma
3439 + htab->splt->output_offset
3441 rel.r_info = ELF32_R_INFO (hgot->indx, R_386_32);
3442 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3443 htab->srelplt2->contents +
3444 sizeof (Elf32_External_Rel));
3448 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3449 really seem like the right value. */
3450 elf_section_data (htab->splt->output_section)
3451 ->this_hdr.sh_entsize = 4;
3453 /* Correct the .rel.plt.unloaded relocations. */
3454 if (htab->is_vxworks && !info->shared)
3456 int num_plts = (htab->splt->size / PLT_ENTRY_SIZE) - 1;
3459 p = htab->srelplt2->contents;
3461 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
3463 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
3465 for (; num_plts; num_plts--)
3467 Elf_Internal_Rela rel;
3468 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3469 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_386_32);
3470 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3471 p += sizeof (Elf32_External_Rel);
3473 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3474 rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_386_32);
3475 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3476 p += sizeof (Elf32_External_Rel);
3484 /* Fill in the first three entries in the global offset table. */
3485 if (htab->sgotplt->size > 0)
3487 bfd_put_32 (output_bfd,
3489 : sdyn->output_section->vma + sdyn->output_offset),
3490 htab->sgotplt->contents);
3491 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
3492 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
3495 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
3498 if (htab->sgot && htab->sgot->size > 0)
3499 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3504 /* Return address for Ith PLT stub in section PLT, for relocation REL
3505 or (bfd_vma) -1 if it should not be included. */
3508 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
3509 const arelent *rel ATTRIBUTE_UNUSED)
3511 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
3515 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3516 #define TARGET_LITTLE_NAME "elf32-i386"
3517 #define ELF_ARCH bfd_arch_i386
3518 #define ELF_MACHINE_CODE EM_386
3519 #define ELF_MAXPAGESIZE 0x1000
3521 #define elf_backend_can_gc_sections 1
3522 #define elf_backend_can_refcount 1
3523 #define elf_backend_want_got_plt 1
3524 #define elf_backend_plt_readonly 1
3525 #define elf_backend_want_plt_sym 0
3526 #define elf_backend_got_header_size 12
3528 /* Support RELA for objdump of prelink objects. */
3529 #define elf_info_to_howto elf_i386_info_to_howto_rel
3530 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3532 #define bfd_elf32_mkobject elf_i386_mkobject
3534 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3535 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3536 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3538 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3539 #define elf_backend_check_relocs elf_i386_check_relocs
3540 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
3541 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
3542 #define elf_backend_fake_sections elf_i386_fake_sections
3543 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3544 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3545 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3546 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
3547 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
3548 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
3549 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
3550 #define elf_backend_relocate_section elf_i386_relocate_section
3551 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
3552 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
3554 #include "elf32-target.h"
3556 /* FreeBSD support. */
3558 #undef TARGET_LITTLE_SYM
3559 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3560 #undef TARGET_LITTLE_NAME
3561 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3563 /* The kernel recognizes executables as valid only if they carry a
3564 "FreeBSD" label in the ELF header. So we put this label on all
3565 executables and (for simplicity) also all other object files. */
3568 elf_i386_post_process_headers (bfd *abfd,
3569 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3571 Elf_Internal_Ehdr *i_ehdrp;
3573 i_ehdrp = elf_elfheader (abfd);
3575 /* Put an ABI label supported by FreeBSD >= 4.1. */
3576 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
3577 #ifdef OLD_FREEBSD_ABI_LABEL
3578 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3579 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
3583 #undef elf_backend_post_process_headers
3584 #define elf_backend_post_process_headers elf_i386_post_process_headers
3586 #define elf32_bed elf32_i386_fbsd_bed
3588 #include "elf32-target.h"
3590 /* VxWorks support. */
3592 #undef TARGET_LITTLE_SYM
3593 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
3594 #undef TARGET_LITTLE_NAME
3595 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
3598 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
3600 static struct bfd_link_hash_table *
3601 elf_i386_vxworks_link_hash_table_create (bfd *abfd)
3603 struct bfd_link_hash_table *ret;
3604 struct elf_i386_link_hash_table *htab;
3606 ret = elf_i386_link_hash_table_create (abfd);
3609 htab = (struct elf_i386_link_hash_table *) ret;
3610 htab->is_vxworks = 1;
3611 htab->plt0_pad_byte = 0x90;
3618 /* Tweak magic VxWorks symbols as they are written to the output file. */
3620 elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info *info
3623 Elf_Internal_Sym *sym,
3624 asection *input_sec ATTRIBUTE_UNUSED,
3625 struct elf_link_hash_entry *h
3628 /* Ignore the first dummy symbol. */
3632 return elf_vxworks_link_output_symbol_hook (name, sym);
3635 #undef elf_backend_post_process_headers
3636 #undef bfd_elf32_bfd_link_hash_table_create
3637 #define bfd_elf32_bfd_link_hash_table_create \
3638 elf_i386_vxworks_link_hash_table_create
3639 #undef elf_backend_add_symbol_hook
3640 #define elf_backend_add_symbol_hook \
3641 elf_vxworks_add_symbol_hook
3642 #undef elf_backend_link_output_symbol_hook
3643 #define elf_backend_link_output_symbol_hook \
3644 elf_i386_vxworks_link_output_symbol_hook
3645 #undef elf_backend_emit_relocs
3646 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
3647 #undef elf_backend_final_write_processing
3648 #define elf_backend_final_write_processing \
3649 elf_vxworks_final_write_processing
3651 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
3653 #undef elf_backend_want_plt_sym
3654 #define elf_backend_want_plt_sym 1
3657 #define elf32_bed elf32_i386_vxworks_bed
3659 #include "elf32-target.h"