1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
3 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
21 /* $FreeBSD: src/contrib/binutils/bfd/elf32-i386.c,v 1.4.2.7 2002/09/01 23:43:37 obrien Exp $ */
22 /* $DragonFly: src/contrib/binutils/bfd/Attic/elf32-i386.c,v 1.2 2003/06/17 04:23:58 dillon Exp $ */
30 static reloc_howto_type *elf_i386_reloc_type_lookup
31 PARAMS ((bfd *, bfd_reloc_code_real_type));
32 static void elf_i386_info_to_howto
33 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
34 static void elf_i386_info_to_howto_rel
35 PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
36 static boolean elf_i386_is_local_label_name
37 PARAMS ((bfd *, const char *));
38 static boolean elf_i386_grok_prstatus
39 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
40 static boolean elf_i386_grok_psinfo
41 PARAMS ((bfd *abfd, Elf_Internal_Note *note));
42 static struct bfd_hash_entry *link_hash_newfunc
43 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
44 static struct bfd_link_hash_table *elf_i386_link_hash_table_create
46 static boolean create_got_section
47 PARAMS((bfd *, struct bfd_link_info *));
48 static boolean elf_i386_create_dynamic_sections
49 PARAMS((bfd *, struct bfd_link_info *));
50 static void elf_i386_copy_indirect_symbol
51 PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
52 static boolean elf_i386_check_relocs
53 PARAMS ((bfd *, struct bfd_link_info *, asection *,
54 const Elf_Internal_Rela *));
55 static asection *elf_i386_gc_mark_hook
56 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
57 struct elf_link_hash_entry *, Elf_Internal_Sym *));
58 static boolean elf_i386_gc_sweep_hook
59 PARAMS ((bfd *, struct bfd_link_info *, asection *,
60 const Elf_Internal_Rela *));
61 static boolean elf_i386_adjust_dynamic_symbol
62 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
63 static boolean allocate_dynrelocs
64 PARAMS ((struct elf_link_hash_entry *, PTR));
65 static boolean readonly_dynrelocs
66 PARAMS ((struct elf_link_hash_entry *, PTR));
67 static boolean elf_i386_fake_sections
68 PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
69 static boolean elf_i386_size_dynamic_sections
70 PARAMS ((bfd *, struct bfd_link_info *));
71 static boolean elf_i386_relocate_section
72 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
73 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
74 static boolean elf_i386_finish_dynamic_symbol
75 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
77 static enum elf_reloc_type_class elf_i386_reloc_type_class
78 PARAMS ((const Elf_Internal_Rela *));
79 static boolean elf_i386_finish_dynamic_sections
80 PARAMS ((bfd *, struct bfd_link_info *));
82 #define USE_REL 1 /* 386 uses REL relocations instead of RELA */
86 static reloc_howto_type elf_howto_table[]=
88 HOWTO(R_386_NONE, 0, 0, 0, false, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_386_NONE",
90 true, 0x00000000, 0x00000000, false),
91 HOWTO(R_386_32, 0, 2, 32, false, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_386_32",
93 true, 0xffffffff, 0xffffffff, false),
94 HOWTO(R_386_PC32, 0, 2, 32, true, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_386_PC32",
96 true, 0xffffffff, 0xffffffff, true),
97 HOWTO(R_386_GOT32, 0, 2, 32, false, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_386_GOT32",
99 true, 0xffffffff, 0xffffffff, false),
100 HOWTO(R_386_PLT32, 0, 2, 32, true, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_386_PLT32",
102 true, 0xffffffff, 0xffffffff, true),
103 HOWTO(R_386_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_386_COPY",
105 true, 0xffffffff, 0xffffffff, false),
106 HOWTO(R_386_GLOB_DAT, 0, 2, 32, false, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
108 true, 0xffffffff, 0xffffffff, false),
109 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, false, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
111 true, 0xffffffff, 0xffffffff, false),
112 HOWTO(R_386_RELATIVE, 0, 2, 32, false, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_386_RELATIVE",
114 true, 0xffffffff, 0xffffffff, false),
115 HOWTO(R_386_GOTOFF, 0, 2, 32, false, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_386_GOTOFF",
117 true, 0xffffffff, 0xffffffff, false),
118 HOWTO(R_386_GOTPC, 0, 2, 32, true, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_386_GOTPC",
120 true, 0xffffffff, 0xffffffff, true),
122 /* We have a gap in the reloc numbers here.
123 R_386_standard counts the number up to this point, and
124 R_386_ext_offset is the value to subtract from a reloc type of
125 R_386_16 thru R_386_PC8 to form an index into this table. */
126 #define R_386_standard ((unsigned int) R_386_GOTPC + 1)
127 #define R_386_ext_offset ((unsigned int) R_386_16 - R_386_standard)
129 /* The remaining relocs are a GNU extension. */
130 HOWTO(R_386_16, 0, 1, 16, false, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_386_16",
132 true, 0xffff, 0xffff, false),
133 HOWTO(R_386_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_386_PC16",
135 true, 0xffff, 0xffff, true),
136 HOWTO(R_386_8, 0, 0, 8, false, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_386_8",
138 true, 0xff, 0xff, false),
139 HOWTO(R_386_PC8, 0, 0, 8, true, 0, complain_overflow_signed,
140 bfd_elf_generic_reloc, "R_386_PC8",
141 true, 0xff, 0xff, true),
144 #define R_386_ext ((unsigned int) R_386_PC8 + 1 - R_386_ext_offset)
145 #define R_386_vt_offset ((unsigned int) R_386_GNU_VTINHERIT - R_386_ext)
147 /* GNU extension to record C++ vtable hierarchy. */
148 HOWTO (R_386_GNU_VTINHERIT, /* type */
150 2, /* size (0 = byte, 1 = short, 2 = long) */
152 false, /* pc_relative */
154 complain_overflow_dont, /* complain_on_overflow */
155 NULL, /* special_function */
156 "R_386_GNU_VTINHERIT", /* name */
157 false, /* partial_inplace */
162 /* GNU extension to record C++ vtable member usage. */
163 HOWTO (R_386_GNU_VTENTRY, /* type */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
167 false, /* pc_relative */
169 complain_overflow_dont, /* complain_on_overflow */
170 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
171 "R_386_GNU_VTENTRY", /* name */
172 false, /* partial_inplace */
177 #define R_386_vt ((unsigned int) R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
181 #ifdef DEBUG_GEN_RELOC
182 #define TRACE(str) fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
187 static reloc_howto_type *
188 elf_i386_reloc_type_lookup (abfd, code)
189 bfd *abfd ATTRIBUTE_UNUSED;
190 bfd_reloc_code_real_type code;
195 TRACE ("BFD_RELOC_NONE");
196 return &elf_howto_table[(unsigned int) R_386_NONE ];
199 TRACE ("BFD_RELOC_32");
200 return &elf_howto_table[(unsigned int) R_386_32 ];
203 TRACE ("BFD_RELOC_CTOR");
204 return &elf_howto_table[(unsigned int) R_386_32 ];
206 case BFD_RELOC_32_PCREL:
207 TRACE ("BFD_RELOC_PC32");
208 return &elf_howto_table[(unsigned int) R_386_PC32 ];
210 case BFD_RELOC_386_GOT32:
211 TRACE ("BFD_RELOC_386_GOT32");
212 return &elf_howto_table[(unsigned int) R_386_GOT32 ];
214 case BFD_RELOC_386_PLT32:
215 TRACE ("BFD_RELOC_386_PLT32");
216 return &elf_howto_table[(unsigned int) R_386_PLT32 ];
218 case BFD_RELOC_386_COPY:
219 TRACE ("BFD_RELOC_386_COPY");
220 return &elf_howto_table[(unsigned int) R_386_COPY ];
222 case BFD_RELOC_386_GLOB_DAT:
223 TRACE ("BFD_RELOC_386_GLOB_DAT");
224 return &elf_howto_table[(unsigned int) R_386_GLOB_DAT ];
226 case BFD_RELOC_386_JUMP_SLOT:
227 TRACE ("BFD_RELOC_386_JUMP_SLOT");
228 return &elf_howto_table[(unsigned int) R_386_JUMP_SLOT ];
230 case BFD_RELOC_386_RELATIVE:
231 TRACE ("BFD_RELOC_386_RELATIVE");
232 return &elf_howto_table[(unsigned int) R_386_RELATIVE ];
234 case BFD_RELOC_386_GOTOFF:
235 TRACE ("BFD_RELOC_386_GOTOFF");
236 return &elf_howto_table[(unsigned int) R_386_GOTOFF ];
238 case BFD_RELOC_386_GOTPC:
239 TRACE ("BFD_RELOC_386_GOTPC");
240 return &elf_howto_table[(unsigned int) R_386_GOTPC ];
242 /* The remaining relocs are a GNU extension. */
244 TRACE ("BFD_RELOC_16");
245 return &elf_howto_table[(unsigned int) R_386_16 - R_386_ext_offset];
247 case BFD_RELOC_16_PCREL:
248 TRACE ("BFD_RELOC_16_PCREL");
249 return &elf_howto_table[(unsigned int) R_386_PC16 - R_386_ext_offset];
252 TRACE ("BFD_RELOC_8");
253 return &elf_howto_table[(unsigned int) R_386_8 - R_386_ext_offset];
255 case BFD_RELOC_8_PCREL:
256 TRACE ("BFD_RELOC_8_PCREL");
257 return &elf_howto_table[(unsigned int) R_386_PC8 - R_386_ext_offset];
259 case BFD_RELOC_VTABLE_INHERIT:
260 TRACE ("BFD_RELOC_VTABLE_INHERIT");
261 return &elf_howto_table[(unsigned int) R_386_GNU_VTINHERIT
264 case BFD_RELOC_VTABLE_ENTRY:
265 TRACE ("BFD_RELOC_VTABLE_ENTRY");
266 return &elf_howto_table[(unsigned int) R_386_GNU_VTENTRY
278 elf_i386_info_to_howto (abfd, cache_ptr, dst)
279 bfd *abfd ATTRIBUTE_UNUSED;
280 arelent *cache_ptr ATTRIBUTE_UNUSED;
281 Elf32_Internal_Rela *dst ATTRIBUTE_UNUSED;
287 elf_i386_info_to_howto_rel (abfd, cache_ptr, dst)
288 bfd *abfd ATTRIBUTE_UNUSED;
290 Elf32_Internal_Rel *dst;
292 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
295 if ((indx = r_type) >= R_386_standard
296 && ((indx = r_type - R_386_ext_offset) - R_386_standard
297 >= R_386_ext - R_386_standard)
298 && ((indx = r_type - R_386_vt_offset) - R_386_ext
299 >= R_386_vt - R_386_ext))
301 (*_bfd_error_handler) (_("%s: invalid relocation type %d"),
302 bfd_archive_filename (abfd), (int) r_type);
303 indx = (unsigned int) R_386_NONE;
305 cache_ptr->howto = &elf_howto_table[indx];
308 /* Return whether a symbol name implies a local label. The UnixWare
309 2.1 cc generates temporary symbols that start with .X, so we
310 recognize them here. FIXME: do other SVR4 compilers also use .X?.
311 If so, we should move the .X recognition into
312 _bfd_elf_is_local_label_name. */
315 elf_i386_is_local_label_name (abfd, name)
319 if (name[0] == '.' && name[1] == 'X')
322 return _bfd_elf_is_local_label_name (abfd, name);
325 /* Support for core dump NOTE sections. */
327 elf_i386_grok_prstatus (abfd, note)
329 Elf_Internal_Note *note;
334 switch (note->descsz)
339 case 144: /* Linux/i386 */
341 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
344 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
353 /* Make a ".reg/999" section. */
354 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
355 raw_size, note->descpos + offset);
359 elf_i386_grok_psinfo (abfd, note)
361 Elf_Internal_Note *note;
363 switch (note->descsz)
368 case 124: /* Linux/i386 elf_prpsinfo */
369 elf_tdata (abfd)->core_program
370 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
371 elf_tdata (abfd)->core_command
372 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
375 /* Note that for some reason, a spurious space is tacked
376 onto the end of the args in some (at least one anyway)
377 implementations, so strip it off if it exists. */
380 char *command = elf_tdata (abfd)->core_command;
381 int n = strlen (command);
383 if (0 < n && command[n - 1] == ' ')
384 command[n - 1] = '\0';
390 /* Functions for the i386 ELF linker.
392 In order to gain some understanding of code in this file without
393 knowing all the intricate details of the linker, note the
396 Functions named elf_i386_* are called by external routines, other
397 functions are only called locally. elf_i386_* functions appear
398 in this file more or less in the order in which they are called
399 from external routines. eg. elf_i386_check_relocs is called
400 early in the link process, elf_i386_finish_dynamic_sections is
401 one of the last functions. */
404 /* The name of the dynamic interpreter. This is put in the .interp
408 #ifndef ELF_DYNAMIC_INTERPRETER
409 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
413 /* The size in bytes of an entry in the procedure linkage table. */
415 #define PLT_ENTRY_SIZE 16
417 /* The first entry in an absolute procedure linkage table looks like
418 this. See the SVR4 ABI i386 supplement to see how this works. */
420 static const bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] =
422 0xff, 0x35, /* pushl contents of address */
423 0, 0, 0, 0, /* replaced with address of .got + 4. */
424 0xff, 0x25, /* jmp indirect */
425 0, 0, 0, 0, /* replaced with address of .got + 8. */
426 0, 0, 0, 0 /* pad out to 16 bytes. */
429 /* Subsequent entries in an absolute procedure linkage table look like
432 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
434 0xff, 0x25, /* jmp indirect */
435 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
436 0x68, /* pushl immediate */
437 0, 0, 0, 0, /* replaced with offset into relocation table. */
438 0xe9, /* jmp relative */
439 0, 0, 0, 0 /* replaced with offset to start of .plt. */
442 /* The first entry in a PIC procedure linkage table look like this. */
444 static const bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] =
446 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
447 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
448 0, 0, 0, 0 /* pad out to 16 bytes. */
451 /* Subsequent entries in a PIC procedure linkage table look like this. */
453 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
455 0xff, 0xa3, /* jmp *offset(%ebx) */
456 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
457 0x68, /* pushl immediate */
458 0, 0, 0, 0, /* replaced with offset into relocation table. */
459 0xe9, /* jmp relative */
460 0, 0, 0, 0 /* replaced with offset to start of .plt. */
463 /* The i386 linker needs to keep track of the number of relocs that it
464 decides to copy as dynamic relocs in check_relocs for each symbol.
465 This is so that it can later discard them if they are found to be
466 unnecessary. We store the information in a field extending the
467 regular ELF linker hash table. */
469 struct elf_i386_dyn_relocs
471 struct elf_i386_dyn_relocs *next;
473 /* The input section of the reloc. */
476 /* Total number of relocs copied for the input section. */
479 /* Number of pc-relative relocs copied for the input section. */
480 bfd_size_type pc_count;
483 /* i386 ELF linker hash entry. */
485 struct elf_i386_link_hash_entry
487 struct elf_link_hash_entry elf;
489 /* Track dynamic relocs copied for this symbol. */
490 struct elf_i386_dyn_relocs *dyn_relocs;
493 /* i386 ELF linker hash table. */
495 struct elf_i386_link_hash_table
497 struct elf_link_hash_table elf;
499 /* Short-cuts to get to dynamic linker sections. */
508 /* Small local sym to section mapping cache. */
509 struct sym_sec_cache sym_sec;
512 /* Get the i386 ELF linker hash table from a link_info structure. */
514 #define elf_i386_hash_table(p) \
515 ((struct elf_i386_link_hash_table *) ((p)->hash))
517 /* Create an entry in an i386 ELF linker hash table. */
519 static struct bfd_hash_entry *
520 link_hash_newfunc (entry, table, string)
521 struct bfd_hash_entry *entry;
522 struct bfd_hash_table *table;
525 /* Allocate the structure if it has not already been allocated by a
529 entry = bfd_hash_allocate (table,
530 sizeof (struct elf_i386_link_hash_entry));
535 /* Call the allocation method of the superclass. */
536 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
539 struct elf_i386_link_hash_entry *eh;
541 eh = (struct elf_i386_link_hash_entry *) entry;
542 eh->dyn_relocs = NULL;
548 /* Create an i386 ELF linker hash table. */
550 static struct bfd_link_hash_table *
551 elf_i386_link_hash_table_create (abfd)
554 struct elf_i386_link_hash_table *ret;
555 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
557 ret = (struct elf_i386_link_hash_table *) bfd_alloc (abfd, amt);
561 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
563 bfd_release (abfd, ret);
574 ret->sym_sec.abfd = NULL;
576 return &ret->elf.root;
579 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
580 shortcuts to them in our hash table. */
583 create_got_section (dynobj, info)
585 struct bfd_link_info *info;
587 struct elf_i386_link_hash_table *htab;
589 if (! _bfd_elf_create_got_section (dynobj, info))
592 htab = elf_i386_hash_table (info);
593 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
594 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
595 if (!htab->sgot || !htab->sgotplt)
598 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
599 if (htab->srelgot == NULL
600 || ! bfd_set_section_flags (dynobj, htab->srelgot,
601 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
602 | SEC_IN_MEMORY | SEC_LINKER_CREATED
604 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
609 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
610 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
614 elf_i386_create_dynamic_sections (dynobj, info)
616 struct bfd_link_info *info;
618 struct elf_i386_link_hash_table *htab;
620 htab = elf_i386_hash_table (info);
621 if (!htab->sgot && !create_got_section (dynobj, info))
624 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
627 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
628 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
629 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
631 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
633 if (!htab->splt || !htab->srelplt || !htab->sdynbss
634 || (!info->shared && !htab->srelbss))
640 /* Copy the extra info we tack onto an elf_link_hash_entry. */
643 elf_i386_copy_indirect_symbol (dir, ind)
644 struct elf_link_hash_entry *dir, *ind;
646 struct elf_i386_link_hash_entry *edir, *eind;
648 edir = (struct elf_i386_link_hash_entry *) dir;
649 eind = (struct elf_i386_link_hash_entry *) ind;
651 if (eind->dyn_relocs != NULL)
653 if (edir->dyn_relocs != NULL)
655 struct elf_i386_dyn_relocs **pp;
656 struct elf_i386_dyn_relocs *p;
658 if (ind->root.type == bfd_link_hash_indirect)
661 /* Add reloc counts against the weak sym to the strong sym
662 list. Merge any entries against the same section. */
663 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
665 struct elf_i386_dyn_relocs *q;
667 for (q = edir->dyn_relocs; q != NULL; q = q->next)
668 if (q->sec == p->sec)
670 q->pc_count += p->pc_count;
671 q->count += p->count;
678 *pp = edir->dyn_relocs;
681 edir->dyn_relocs = eind->dyn_relocs;
682 eind->dyn_relocs = NULL;
685 _bfd_elf_link_hash_copy_indirect (dir, ind);
688 /* Look through the relocs for a section during the first phase, and
689 calculate needed space in the global offset table, procedure linkage
690 table, and dynamic reloc sections. */
693 elf_i386_check_relocs (abfd, info, sec, relocs)
695 struct bfd_link_info *info;
697 const Elf_Internal_Rela *relocs;
699 struct elf_i386_link_hash_table *htab;
700 Elf_Internal_Shdr *symtab_hdr;
701 struct elf_link_hash_entry **sym_hashes;
702 const Elf_Internal_Rela *rel;
703 const Elf_Internal_Rela *rel_end;
706 if (info->relocateable)
709 htab = elf_i386_hash_table (info);
710 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
711 sym_hashes = elf_sym_hashes (abfd);
715 rel_end = relocs + sec->reloc_count;
716 for (rel = relocs; rel < rel_end; rel++)
718 unsigned long r_symndx;
719 struct elf_link_hash_entry *h;
721 r_symndx = ELF32_R_SYM (rel->r_info);
723 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
725 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
726 bfd_archive_filename (abfd),
731 if (r_symndx < symtab_hdr->sh_info)
734 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
736 switch (ELF32_R_TYPE (rel->r_info))
739 /* This symbol requires a global offset table entry. */
742 h->got.refcount += 1;
746 bfd_signed_vma *local_got_refcounts;
748 /* This is a global offset table entry for a local symbol. */
749 local_got_refcounts = elf_local_got_refcounts (abfd);
750 if (local_got_refcounts == NULL)
754 size = symtab_hdr->sh_info;
755 size *= sizeof (bfd_signed_vma);
756 local_got_refcounts = ((bfd_signed_vma *)
757 bfd_zalloc (abfd, size));
758 if (local_got_refcounts == NULL)
760 elf_local_got_refcounts (abfd) = local_got_refcounts;
762 local_got_refcounts[r_symndx] += 1;
768 if (htab->sgot == NULL)
770 if (htab->elf.dynobj == NULL)
771 htab->elf.dynobj = abfd;
772 if (!create_got_section (htab->elf.dynobj, info))
778 /* This symbol requires a procedure linkage table entry. We
779 actually build the entry in adjust_dynamic_symbol,
780 because this might be a case of linking PIC code which is
781 never referenced by a dynamic object, in which case we
782 don't need to generate a procedure linkage table entry
785 /* If this is a local symbol, we resolve it directly without
786 creating a procedure linkage table entry. */
790 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
791 h->plt.refcount += 1;
796 if (h != NULL && !info->shared)
798 /* If this reloc is in a read-only section, we might
799 need a copy reloc. We can't check reliably at this
800 stage whether the section is read-only, as input
801 sections have not yet been mapped to output sections.
802 Tentatively set the flag for now, and correct in
803 adjust_dynamic_symbol. */
804 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
806 /* We may need a .plt entry if the function this reloc
807 refers to is in a shared lib. */
808 h->plt.refcount += 1;
811 /* If we are creating a shared library, and this is a reloc
812 against a global symbol, or a non PC relative reloc
813 against a local symbol, then we need to copy the reloc
814 into the shared library. However, if we are linking with
815 -Bsymbolic, we do not need to copy a reloc against a
816 global symbol which is defined in an object we are
817 including in the link (i.e., DEF_REGULAR is set). At
818 this point we have not seen all the input files, so it is
819 possible that DEF_REGULAR is not set now but will be set
820 later (it is never cleared). In case of a weak definition,
821 DEF_REGULAR may be cleared later by a strong definition in
822 a shared library. We account for that possibility below by
823 storing information in the relocs_copied field of the hash
824 table entry. A similar situation occurs when creating
825 shared libraries and symbol visibility changes render the
828 If on the other hand, we are creating an executable, we
829 may need to keep relocations for symbols satisfied by a
830 dynamic library if we manage to avoid copy relocs for the
833 && (sec->flags & SEC_ALLOC) != 0
834 && (ELF32_R_TYPE (rel->r_info) != R_386_PC32
837 || h->root.type == bfd_link_hash_defweak
838 || (h->elf_link_hash_flags
839 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
841 && (sec->flags & SEC_ALLOC) != 0
843 && (h->root.type == bfd_link_hash_defweak
844 || (h->elf_link_hash_flags
845 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
847 struct elf_i386_dyn_relocs *p;
848 struct elf_i386_dyn_relocs **head;
850 /* We must copy these reloc types into the output file.
851 Create a reloc section in dynobj and make room for
857 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
858 unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
860 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
864 if (strncmp (name, ".rel", 4) != 0
865 || strcmp (bfd_get_section_name (abfd, sec),
868 (*_bfd_error_handler)
869 (_("%s: bad relocation section name `%s\'"),
870 bfd_archive_filename (abfd), name);
873 if (htab->elf.dynobj == NULL)
874 htab->elf.dynobj = abfd;
876 dynobj = htab->elf.dynobj;
877 sreloc = bfd_get_section_by_name (dynobj, name);
882 sreloc = bfd_make_section (dynobj, name);
883 flags = (SEC_HAS_CONTENTS | SEC_READONLY
884 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
885 if ((sec->flags & SEC_ALLOC) != 0)
886 flags |= SEC_ALLOC | SEC_LOAD;
888 || ! bfd_set_section_flags (dynobj, sreloc, flags)
889 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
892 elf_section_data (sec)->sreloc = sreloc;
895 /* If this is a global symbol, we count the number of
896 relocations we need for this symbol. */
899 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
903 /* Track dynamic relocs needed for local syms too.
904 We really need local syms available to do this
908 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
913 head = ((struct elf_i386_dyn_relocs **)
914 &elf_section_data (s)->local_dynrel);
918 if (p == NULL || p->sec != sec)
920 bfd_size_type amt = sizeof *p;
921 p = ((struct elf_i386_dyn_relocs *)
922 bfd_alloc (htab->elf.dynobj, amt));
933 if (ELF32_R_TYPE (rel->r_info) == R_386_PC32)
938 /* This relocation describes the C++ object vtable hierarchy.
939 Reconstruct it for later use during GC. */
940 case R_386_GNU_VTINHERIT:
941 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
945 /* This relocation describes which C++ vtable entries are actually
946 used. Record for later use during GC. */
947 case R_386_GNU_VTENTRY:
948 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
960 /* Return the section that should be marked against GC for a given
964 elf_i386_gc_mark_hook (abfd, info, rel, h, sym)
966 struct bfd_link_info *info ATTRIBUTE_UNUSED;
967 Elf_Internal_Rela *rel;
968 struct elf_link_hash_entry *h;
969 Elf_Internal_Sym *sym;
973 switch (ELF32_R_TYPE (rel->r_info))
975 case R_386_GNU_VTINHERIT:
976 case R_386_GNU_VTENTRY:
980 switch (h->root.type)
982 case bfd_link_hash_defined:
983 case bfd_link_hash_defweak:
984 return h->root.u.def.section;
986 case bfd_link_hash_common:
987 return h->root.u.c.p->section;
996 return bfd_section_from_elf_index (abfd, sym->st_shndx);
1002 /* Update the got entry reference counts for the section being removed. */
1005 elf_i386_gc_sweep_hook (abfd, info, sec, relocs)
1007 struct bfd_link_info *info;
1009 const Elf_Internal_Rela *relocs;
1011 Elf_Internal_Shdr *symtab_hdr;
1012 struct elf_link_hash_entry **sym_hashes;
1013 bfd_signed_vma *local_got_refcounts;
1014 const Elf_Internal_Rela *rel, *relend;
1015 unsigned long r_symndx;
1016 struct elf_link_hash_entry *h;
1018 elf_section_data (sec)->local_dynrel = NULL;
1020 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1021 sym_hashes = elf_sym_hashes (abfd);
1022 local_got_refcounts = elf_local_got_refcounts (abfd);
1024 relend = relocs + sec->reloc_count;
1025 for (rel = relocs; rel < relend; rel++)
1026 switch (ELF32_R_TYPE (rel->r_info))
1031 r_symndx = ELF32_R_SYM (rel->r_info);
1032 if (r_symndx >= symtab_hdr->sh_info)
1034 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1035 if (h->got.refcount > 0)
1036 h->got.refcount -= 1;
1038 else if (local_got_refcounts != NULL)
1040 if (local_got_refcounts[r_symndx] > 0)
1041 local_got_refcounts[r_symndx] -= 1;
1047 r_symndx = ELF32_R_SYM (rel->r_info);
1048 if (r_symndx >= symtab_hdr->sh_info)
1050 struct elf_i386_link_hash_entry *eh;
1051 struct elf_i386_dyn_relocs **pp;
1052 struct elf_i386_dyn_relocs *p;
1054 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1056 if (!info->shared && h->plt.refcount > 0)
1057 h->plt.refcount -= 1;
1059 eh = (struct elf_i386_link_hash_entry *) h;
1061 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1064 if (ELF32_R_TYPE (rel->r_info) == R_386_PC32)
1075 r_symndx = ELF32_R_SYM (rel->r_info);
1076 if (r_symndx >= symtab_hdr->sh_info)
1078 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1079 if (h->plt.refcount > 0)
1080 h->plt.refcount -= 1;
1091 /* Adjust a symbol defined by a dynamic object and referenced by a
1092 regular object. The current definition is in some section of the
1093 dynamic object, but we're not including those sections. We have to
1094 change the definition to something the rest of the link can
1098 elf_i386_adjust_dynamic_symbol (info, h)
1099 struct bfd_link_info *info;
1100 struct elf_link_hash_entry *h;
1102 struct elf_i386_link_hash_table *htab;
1103 struct elf_i386_link_hash_entry * eh;
1104 struct elf_i386_dyn_relocs *p;
1106 unsigned int power_of_two;
1108 /* If this is a function, put it in the procedure linkage table. We
1109 will fill in the contents of the procedure linkage table later,
1110 when we know the address of the .got section. */
1111 if (h->type == STT_FUNC
1112 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1114 if (h->plt.refcount <= 0
1116 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
1117 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
1118 && h->root.type != bfd_link_hash_undefweak
1119 && h->root.type != bfd_link_hash_undefined))
1121 /* This case can occur if we saw a PLT32 reloc in an input
1122 file, but the symbol was never referred to by a dynamic
1123 object, or if all references were garbage collected. In
1124 such a case, we don't actually need to build a procedure
1125 linkage table, and we can just do a PC32 reloc instead. */
1126 h->plt.offset = (bfd_vma) -1;
1127 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1133 /* It's possible that we incorrectly decided a .plt reloc was
1134 needed for an R_386_PC32 reloc to a non-function sym in
1135 check_relocs. We can't decide accurately between function and
1136 non-function syms in check-relocs; Objects loaded later in
1137 the link may change h->type. So fix it now. */
1138 h->plt.offset = (bfd_vma) -1;
1140 /* If this is a weak symbol, and there is a real definition, the
1141 processor independent code will have arranged for us to see the
1142 real definition first, and we can just use the same value. */
1143 if (h->weakdef != NULL)
1145 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1146 || h->weakdef->root.type == bfd_link_hash_defweak);
1147 h->root.u.def.section = h->weakdef->root.u.def.section;
1148 h->root.u.def.value = h->weakdef->root.u.def.value;
1152 /* This is a reference to a symbol defined by a dynamic object which
1153 is not a function. */
1155 /* If we are creating a shared library, we must presume that the
1156 only references to the symbol are via the global offset table.
1157 For such cases we need not do anything here; the relocations will
1158 be handled correctly by relocate_section. */
1162 /* If there are no references to this symbol that do not use the
1163 GOT, we don't need to generate a copy reloc. */
1164 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1167 /* If -z nocopyreloc was given, we won't generate them either. */
1168 if (info->nocopyreloc)
1170 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1174 eh = (struct elf_i386_link_hash_entry *) h;
1175 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1177 s = p->sec->output_section;
1178 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1182 /* If we didn't find any dynamic relocs in read-only sections, then
1183 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1186 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1190 /* We must allocate the symbol in our .dynbss section, which will
1191 become part of the .bss section of the executable. There will be
1192 an entry for this symbol in the .dynsym section. The dynamic
1193 object will contain position independent code, so all references
1194 from the dynamic object to this symbol will go through the global
1195 offset table. The dynamic linker will use the .dynsym entry to
1196 determine the address it must put in the global offset table, so
1197 both the dynamic object and the regular object will refer to the
1198 same memory location for the variable. */
1200 htab = elf_i386_hash_table (info);
1202 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1203 copy the initial value out of the dynamic object and into the
1204 runtime process image. */
1205 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1207 htab->srelbss->_raw_size += sizeof (Elf32_External_Rel);
1208 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1211 /* We need to figure out the alignment required for this symbol. I
1212 have no idea how ELF linkers handle this. */
1213 power_of_two = bfd_log2 (h->size);
1214 if (power_of_two > 3)
1217 /* Apply the required alignment. */
1219 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1220 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1222 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1226 /* Define the symbol as being at this point in the section. */
1227 h->root.u.def.section = s;
1228 h->root.u.def.value = s->_raw_size;
1230 /* Increment the section size to make room for the symbol. */
1231 s->_raw_size += h->size;
1236 /* This is the condition under which elf_i386_finish_dynamic_symbol
1237 will be called from elflink.h. If elflink.h doesn't call our
1238 finish_dynamic_symbol routine, we'll need to do something about
1239 initializing any .plt and .got entries in elf_i386_relocate_section. */
1240 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1242 && ((INFO)->shared \
1243 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1244 && ((H)->dynindx != -1 \
1245 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1247 /* Allocate space in .plt, .got and associated reloc sections for
1251 allocate_dynrelocs (h, inf)
1252 struct elf_link_hash_entry *h;
1255 struct bfd_link_info *info;
1256 struct elf_i386_link_hash_table *htab;
1257 struct elf_i386_link_hash_entry *eh;
1258 struct elf_i386_dyn_relocs *p;
1260 if (h->root.type == bfd_link_hash_indirect)
1263 if (h->root.type == bfd_link_hash_warning)
1264 /* When warning symbols are created, they **replace** the "real"
1265 entry in the hash table, thus we never get to see the real
1266 symbol in a hash traversal. So look at it now. */
1267 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1269 info = (struct bfd_link_info *) inf;
1270 htab = elf_i386_hash_table (info);
1272 if (htab->elf.dynamic_sections_created
1273 && h->plt.refcount > 0)
1275 /* Make sure this symbol is output as a dynamic symbol.
1276 Undefined weak syms won't yet be marked as dynamic. */
1277 if (h->dynindx == -1
1278 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1280 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1284 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
1286 asection *s = htab->splt;
1288 /* If this is the first .plt entry, make room for the special
1290 if (s->_raw_size == 0)
1291 s->_raw_size += PLT_ENTRY_SIZE;
1293 h->plt.offset = s->_raw_size;
1295 /* If this symbol is not defined in a regular file, and we are
1296 not generating a shared library, then set the symbol to this
1297 location in the .plt. This is required to make function
1298 pointers compare as equal between the normal executable and
1299 the shared library. */
1301 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1303 h->root.u.def.section = s;
1304 h->root.u.def.value = h->plt.offset;
1307 /* Make room for this entry. */
1308 s->_raw_size += PLT_ENTRY_SIZE;
1310 /* We also need to make an entry in the .got.plt section, which
1311 will be placed in the .got section by the linker script. */
1312 htab->sgotplt->_raw_size += 4;
1314 /* We also need to make an entry in the .rel.plt section. */
1315 htab->srelplt->_raw_size += sizeof (Elf32_External_Rel);
1319 h->plt.offset = (bfd_vma) -1;
1320 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1325 h->plt.offset = (bfd_vma) -1;
1326 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1329 if (h->got.refcount > 0)
1334 /* Make sure this symbol is output as a dynamic symbol.
1335 Undefined weak syms won't yet be marked as dynamic. */
1336 if (h->dynindx == -1
1337 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1339 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1344 h->got.offset = s->_raw_size;
1346 dyn = htab->elf.dynamic_sections_created;
1347 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
1348 htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
1351 h->got.offset = (bfd_vma) -1;
1353 eh = (struct elf_i386_link_hash_entry *) h;
1354 if (eh->dyn_relocs == NULL)
1357 /* In the shared -Bsymbolic case, discard space allocated for
1358 dynamic pc-relative relocs against symbols which turn out to be
1359 defined in regular objects. For the normal shared case, discard
1360 space for pc-relative relocs that have become local due to symbol
1361 visibility changes. */
1365 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1366 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
1369 struct elf_i386_dyn_relocs **pp;
1371 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1373 p->count -= p->pc_count;
1384 /* For the non-shared case, discard space for relocs against
1385 symbols which turn out to need copy relocs or are not
1388 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1389 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1390 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1391 || (htab->elf.dynamic_sections_created
1392 && (h->root.type == bfd_link_hash_undefweak
1393 || h->root.type == bfd_link_hash_undefined))))
1395 /* Make sure this symbol is output as a dynamic symbol.
1396 Undefined weak syms won't yet be marked as dynamic. */
1397 if (h->dynindx == -1
1398 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1400 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1404 /* If that succeeded, we know we'll be keeping all the
1406 if (h->dynindx != -1)
1410 eh->dyn_relocs = NULL;
1415 /* Finally, allocate space. */
1416 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1418 asection *sreloc = elf_section_data (p->sec)->sreloc;
1419 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel);
1425 /* Find any dynamic relocs that apply to read-only sections. */
1428 readonly_dynrelocs (h, inf)
1429 struct elf_link_hash_entry *h;
1432 struct elf_i386_link_hash_entry *eh;
1433 struct elf_i386_dyn_relocs *p;
1435 if (h->root.type == bfd_link_hash_warning)
1436 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1438 eh = (struct elf_i386_link_hash_entry *) h;
1439 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1441 asection *s = p->sec->output_section;
1443 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1445 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1447 info->flags |= DF_TEXTREL;
1449 /* Not an error, just cut short the traversal. */
1456 /* Set the sizes of the dynamic sections. */
1459 elf_i386_size_dynamic_sections (output_bfd, info)
1460 bfd *output_bfd ATTRIBUTE_UNUSED;
1461 struct bfd_link_info *info;
1463 struct elf_i386_link_hash_table *htab;
1469 htab = elf_i386_hash_table (info);
1470 dynobj = htab->elf.dynobj;
1474 if (htab->elf.dynamic_sections_created)
1476 /* Set the contents of the .interp section to the interpreter. */
1479 s = bfd_get_section_by_name (dynobj, ".interp");
1482 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1483 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1487 /* Set up .got offsets for local syms, and space for local dynamic
1489 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1491 bfd_signed_vma *local_got;
1492 bfd_signed_vma *end_local_got;
1493 bfd_size_type locsymcount;
1494 Elf_Internal_Shdr *symtab_hdr;
1497 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1500 for (s = ibfd->sections; s != NULL; s = s->next)
1502 struct elf_i386_dyn_relocs *p;
1504 for (p = *((struct elf_i386_dyn_relocs **)
1505 &elf_section_data (s)->local_dynrel);
1509 if (!bfd_is_abs_section (p->sec)
1510 && bfd_is_abs_section (p->sec->output_section))
1512 /* Input section has been discarded, either because
1513 it is a copy of a linkonce section or due to
1514 linker script /DISCARD/, so we'll be discarding
1517 else if (p->count != 0)
1519 srel = elf_section_data (p->sec)->sreloc;
1520 srel->_raw_size += p->count * sizeof (Elf32_External_Rel);
1521 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1522 info->flags |= DF_TEXTREL;
1527 local_got = elf_local_got_refcounts (ibfd);
1531 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1532 locsymcount = symtab_hdr->sh_info;
1533 end_local_got = local_got + locsymcount;
1535 srel = htab->srelgot;
1536 for (; local_got < end_local_got; ++local_got)
1540 *local_got = s->_raw_size;
1543 srel->_raw_size += sizeof (Elf32_External_Rel);
1546 *local_got = (bfd_vma) -1;
1550 /* Allocate global sym .plt and .got entries, and space for global
1551 sym dynamic relocs. */
1552 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1554 /* We now have determined the sizes of the various dynamic sections.
1555 Allocate memory for them. */
1557 for (s = dynobj->sections; s != NULL; s = s->next)
1559 if ((s->flags & SEC_LINKER_CREATED) == 0)
1564 || s == htab->sgotplt)
1566 /* Strip this section if we don't need it; see the
1569 else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0)
1571 if (s->_raw_size != 0 && s != htab->srelplt)
1574 /* We use the reloc_count field as a counter if we need
1575 to copy relocs into the output file. */
1580 /* It's not one of our sections, so don't allocate space. */
1584 if (s->_raw_size == 0)
1586 /* If we don't need this section, strip it from the
1587 output file. This is mostly to handle .rel.bss and
1588 .rel.plt. We must create both sections in
1589 create_dynamic_sections, because they must be created
1590 before the linker maps input sections to output
1591 sections. The linker does that before
1592 adjust_dynamic_symbol is called, and it is that
1593 function which decides whether anything needs to go
1594 into these sections. */
1596 _bfd_strip_section_from_output (info, s);
1600 /* Allocate memory for the section contents. We use bfd_zalloc
1601 here in case unused entries are not reclaimed before the
1602 section's contents are written out. This should not happen,
1603 but this way if it does, we get a R_386_NONE reloc instead
1605 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
1606 if (s->contents == NULL)
1610 if (htab->elf.dynamic_sections_created)
1612 /* Add some entries to the .dynamic section. We fill in the
1613 values later, in elf_i386_finish_dynamic_sections, but we
1614 must add the entries now so that we get the correct size for
1615 the .dynamic section. The DT_DEBUG entry is filled in by the
1616 dynamic linker and used by the debugger. */
1617 #define add_dynamic_entry(TAG, VAL) \
1618 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1622 if (!add_dynamic_entry (DT_DEBUG, 0))
1626 if (htab->splt->_raw_size != 0)
1628 if (!add_dynamic_entry (DT_PLTGOT, 0)
1629 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1630 || !add_dynamic_entry (DT_PLTREL, DT_REL)
1631 || !add_dynamic_entry (DT_JMPREL, 0))
1637 if (!add_dynamic_entry (DT_REL, 0)
1638 || !add_dynamic_entry (DT_RELSZ, 0)
1639 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
1642 /* If any dynamic relocs apply to a read-only section,
1643 then we need a DT_TEXTREL entry. */
1644 if ((info->flags & DF_TEXTREL) == 0)
1645 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
1648 if ((info->flags & DF_TEXTREL) != 0)
1650 if (!add_dynamic_entry (DT_TEXTREL, 0))
1655 #undef add_dynamic_entry
1660 /* Set the correct type for an x86 ELF section. We do this by the
1661 section name, which is a hack, but ought to work. */
1664 elf_i386_fake_sections (abfd, hdr, sec)
1665 bfd *abfd ATTRIBUTE_UNUSED;
1666 Elf32_Internal_Shdr *hdr;
1669 register const char *name;
1671 name = bfd_get_section_name (abfd, sec);
1673 /* This is an ugly, but unfortunately necessary hack that is
1674 needed when producing EFI binaries on x86. It tells
1675 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1676 containing ELF relocation info. We need this hack in order to
1677 be able to generate ELF binaries that can be translated into
1678 EFI applications (which are essentially COFF objects). Those
1679 files contain a COFF ".reloc" section inside an ELFNN object,
1680 which would normally cause BFD to segfault because it would
1681 attempt to interpret this section as containing relocation
1682 entries for section "oc". With this hack enabled, ".reloc"
1683 will be treated as a normal data section, which will avoid the
1684 segfault. However, you won't be able to create an ELFNN binary
1685 with a section named "oc" that needs relocations, but that's
1686 the kind of ugly side-effects you get when detecting section
1687 types based on their names... In practice, this limitation is
1688 unlikely to bite. */
1689 if (strcmp (name, ".reloc") == 0)
1690 hdr->sh_type = SHT_PROGBITS;
1695 /* Relocate an i386 ELF section. */
1698 elf_i386_relocate_section (output_bfd, info, input_bfd, input_section,
1699 contents, relocs, local_syms, local_sections)
1701 struct bfd_link_info *info;
1703 asection *input_section;
1705 Elf_Internal_Rela *relocs;
1706 Elf_Internal_Sym *local_syms;
1707 asection **local_sections;
1709 struct elf_i386_link_hash_table *htab;
1710 Elf_Internal_Shdr *symtab_hdr;
1711 struct elf_link_hash_entry **sym_hashes;
1712 bfd_vma *local_got_offsets;
1713 Elf_Internal_Rela *rel;
1714 Elf_Internal_Rela *relend;
1716 htab = elf_i386_hash_table (info);
1717 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1718 sym_hashes = elf_sym_hashes (input_bfd);
1719 local_got_offsets = elf_local_got_offsets (input_bfd);
1722 relend = relocs + input_section->reloc_count;
1723 for (; rel < relend; rel++)
1726 reloc_howto_type *howto;
1727 unsigned long r_symndx;
1728 struct elf_link_hash_entry *h;
1729 Elf_Internal_Sym *sym;
1733 boolean unresolved_reloc;
1734 bfd_reloc_status_type r;
1737 r_type = ELF32_R_TYPE (rel->r_info);
1738 if (r_type == (int) R_386_GNU_VTINHERIT
1739 || r_type == (int) R_386_GNU_VTENTRY)
1742 if ((indx = (unsigned) r_type) >= R_386_standard
1743 && ((indx = (unsigned) r_type - R_386_ext_offset) - R_386_standard
1744 >= R_386_ext - R_386_standard))
1746 bfd_set_error (bfd_error_bad_value);
1749 howto = elf_howto_table + indx;
1751 r_symndx = ELF32_R_SYM (rel->r_info);
1753 if (info->relocateable)
1755 /* This is a relocatable link. We don't have to change
1756 anything, unless the reloc is against a section symbol,
1757 in which case we have to adjust according to where the
1758 section symbol winds up in the output section. */
1759 if (r_symndx < symtab_hdr->sh_info)
1761 sym = local_syms + r_symndx;
1762 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1766 sec = local_sections[r_symndx];
1767 val = bfd_get_32 (input_bfd, contents + rel->r_offset);
1768 val += sec->output_offset + sym->st_value;
1769 bfd_put_32 (input_bfd, val, contents + rel->r_offset);
1775 /* This is a final link. */
1779 unresolved_reloc = false;
1780 if (r_symndx < symtab_hdr->sh_info)
1782 sym = local_syms + r_symndx;
1783 sec = local_sections[r_symndx];
1784 relocation = (sec->output_section->vma
1785 + sec->output_offset
1787 if ((sec->flags & SEC_MERGE)
1788 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1793 if (howto->src_mask != 0xffffffff)
1795 (*_bfd_error_handler)
1796 (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"),
1797 bfd_archive_filename (input_bfd),
1798 bfd_get_section_name (input_bfd, input_section),
1799 (long) rel->r_offset, howto->name);
1803 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
1806 _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
1808 addend += msec->output_section->vma + msec->output_offset;
1809 bfd_put_32 (input_bfd, addend, contents + rel->r_offset);
1814 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1815 while (h->root.type == bfd_link_hash_indirect
1816 || h->root.type == bfd_link_hash_warning)
1817 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1820 if (h->root.type == bfd_link_hash_defined
1821 || h->root.type == bfd_link_hash_defweak)
1823 sec = h->root.u.def.section;
1824 if (sec->output_section == NULL)
1825 /* Set a flag that will be cleared later if we find a
1826 relocation value for this symbol. output_section
1827 is typically NULL for symbols satisfied by a shared
1829 unresolved_reloc = true;
1831 relocation = (h->root.u.def.value
1832 + sec->output_section->vma
1833 + sec->output_offset);
1835 else if (h->root.type == bfd_link_hash_undefweak)
1837 else if (info->shared
1838 && (!info->symbolic || info->allow_shlib_undefined)
1839 && !info->no_undefined
1840 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
1844 if (! ((*info->callbacks->undefined_symbol)
1845 (info, h->root.root.string, input_bfd,
1846 input_section, rel->r_offset,
1847 (!info->shared || info->no_undefined
1848 || ELF_ST_VISIBILITY (h->other)))))
1856 /* Relocation is to the entry for this symbol in the global
1858 if (htab->sgot == NULL)
1865 off = h->got.offset;
1866 dyn = htab->elf.dynamic_sections_created;
1867 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
1871 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
1872 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1874 /* This is actually a static link, or it is a
1875 -Bsymbolic link and the symbol is defined
1876 locally, or the symbol was forced to be local
1877 because of a version file. We must initialize
1878 this entry in the global offset table. Since the
1879 offset must always be a multiple of 4, we use the
1880 least significant bit to record whether we have
1881 initialized it already.
1883 When doing a dynamic link, we create a .rel.got
1884 relocation entry to initialize the value. This
1885 is done in the finish_dynamic_symbol routine. */
1890 bfd_put_32 (output_bfd, relocation,
1891 htab->sgot->contents + off);
1896 unresolved_reloc = false;
1900 if (local_got_offsets == NULL)
1903 off = local_got_offsets[r_symndx];
1905 /* The offset must always be a multiple of 4. We use
1906 the least significant bit to record whether we have
1907 already generated the necessary reloc. */
1912 bfd_put_32 (output_bfd, relocation,
1913 htab->sgot->contents + off);
1918 Elf_Internal_Rel outrel;
1919 Elf32_External_Rel *loc;
1921 srelgot = htab->srelgot;
1922 if (srelgot == NULL)
1925 outrel.r_offset = (htab->sgot->output_section->vma
1926 + htab->sgot->output_offset
1928 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
1929 loc = (Elf32_External_Rel *) srelgot->contents;
1930 loc += srelgot->reloc_count++;
1931 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
1934 local_got_offsets[r_symndx] |= 1;
1938 if (off >= (bfd_vma) -2)
1941 relocation = htab->sgot->output_offset + off;
1945 /* Relocation is relative to the start of the global offset
1948 /* Note that sgot->output_offset is not involved in this
1949 calculation. We always want the start of .got. If we
1950 defined _GLOBAL_OFFSET_TABLE in a different way, as is
1951 permitted by the ABI, we might have to change this
1953 relocation -= htab->sgot->output_section->vma;
1957 /* Use global offset table as symbol value. */
1958 relocation = htab->sgot->output_section->vma;
1959 unresolved_reloc = false;
1963 /* Relocation is to the entry for this symbol in the
1964 procedure linkage table. */
1966 /* Resolve a PLT32 reloc against a local symbol directly,
1967 without using the procedure linkage table. */
1971 if (h->plt.offset == (bfd_vma) -1
1972 || htab->splt == NULL)
1974 /* We didn't make a PLT entry for this symbol. This
1975 happens when statically linking PIC code, or when
1976 using -Bsymbolic. */
1980 relocation = (htab->splt->output_section->vma
1981 + htab->splt->output_offset
1983 unresolved_reloc = false;
1988 /* r_symndx will be zero only for relocs against symbols
1989 from removed linkonce sections, or sections discarded by
1992 || (input_section->flags & SEC_ALLOC) == 0)
1996 && (r_type != R_386_PC32
1999 && (! info->symbolic
2000 || (h->elf_link_hash_flags
2001 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
2005 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2006 && (((h->elf_link_hash_flags
2007 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2008 && (h->elf_link_hash_flags
2009 & ELF_LINK_HASH_DEF_REGULAR) == 0)
2010 || h->root.type == bfd_link_hash_undefweak
2011 || h->root.type == bfd_link_hash_undefined)))
2013 Elf_Internal_Rel outrel;
2014 boolean skip, relocate;
2016 Elf32_External_Rel *loc;
2018 /* When generating a shared object, these relocations
2019 are copied into the output file to be resolved at run
2026 _bfd_elf_section_offset (output_bfd, info, input_section,
2028 if (outrel.r_offset == (bfd_vma) -1)
2030 else if (outrel.r_offset == (bfd_vma) -2)
2031 skip = true, relocate = true;
2032 outrel.r_offset += (input_section->output_section->vma
2033 + input_section->output_offset);
2036 memset (&outrel, 0, sizeof outrel);
2039 && (r_type == R_386_PC32
2042 || (h->elf_link_hash_flags
2043 & ELF_LINK_HASH_DEF_REGULAR) == 0))
2044 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2047 /* This symbol is local, or marked to become local. */
2049 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2052 sreloc = elf_section_data (input_section)->sreloc;
2056 loc = (Elf32_External_Rel *) sreloc->contents;
2057 loc += sreloc->reloc_count++;
2058 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2060 /* If this reloc is against an external symbol, we do
2061 not want to fiddle with the addend. Otherwise, we
2062 need to include the symbol value so that it becomes
2063 an addend for the dynamic reloc. */
2073 /* FIXME: Why do we allow debugging sections to escape this error?
2074 More importantly, why do we not emit dynamic relocs for
2075 R_386_32 above in debugging sections (which are ! SEC_ALLOC)?
2076 If we had emitted the dynamic reloc, we could remove the
2078 if (unresolved_reloc
2080 && (input_section->flags & SEC_DEBUGGING) != 0
2081 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2082 (*_bfd_error_handler)
2083 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2084 bfd_archive_filename (input_bfd),
2085 bfd_get_section_name (input_bfd, input_section),
2086 (long) rel->r_offset,
2087 h->root.root.string);
2089 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2090 contents, rel->r_offset,
2091 relocation, (bfd_vma) 0);
2093 if (r != bfd_reloc_ok)
2098 name = h->root.root.string;
2101 name = bfd_elf_string_from_elf_section (input_bfd,
2102 symtab_hdr->sh_link,
2107 name = bfd_section_name (input_bfd, sec);
2110 if (r == bfd_reloc_overflow)
2113 if (! ((*info->callbacks->reloc_overflow)
2114 (info, name, howto->name, (bfd_vma) 0,
2115 input_bfd, input_section, rel->r_offset)))
2120 (*_bfd_error_handler)
2121 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2122 bfd_archive_filename (input_bfd),
2123 bfd_get_section_name (input_bfd, input_section),
2124 (long) rel->r_offset, name, (int) r);
2133 /* Finish up dynamic symbol handling. We set the contents of various
2134 dynamic sections here. */
2137 elf_i386_finish_dynamic_symbol (output_bfd, info, h, sym)
2139 struct bfd_link_info *info;
2140 struct elf_link_hash_entry *h;
2141 Elf_Internal_Sym *sym;
2143 struct elf_i386_link_hash_table *htab;
2145 htab = elf_i386_hash_table (info);
2147 if (h->plt.offset != (bfd_vma) -1)
2151 Elf_Internal_Rel rel;
2152 Elf32_External_Rel *loc;
2154 /* This symbol has an entry in the procedure linkage table. Set
2157 if (h->dynindx == -1
2158 || htab->splt == NULL
2159 || htab->sgotplt == NULL
2160 || htab->srelplt == NULL)
2163 /* Get the index in the procedure linkage table which
2164 corresponds to this symbol. This is the index of this symbol
2165 in all the symbols for which we are making plt entries. The
2166 first entry in the procedure linkage table is reserved. */
2167 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
2169 /* Get the offset into the .got table of the entry that
2170 corresponds to this function. Each .got entry is 4 bytes.
2171 The first three are reserved. */
2172 got_offset = (plt_index + 3) * 4;
2174 /* Fill in the entry in the procedure linkage table. */
2177 memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
2179 bfd_put_32 (output_bfd,
2180 (htab->sgotplt->output_section->vma
2181 + htab->sgotplt->output_offset
2183 htab->splt->contents + h->plt.offset + 2);
2187 memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
2189 bfd_put_32 (output_bfd, got_offset,
2190 htab->splt->contents + h->plt.offset + 2);
2193 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
2194 htab->splt->contents + h->plt.offset + 7);
2195 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
2196 htab->splt->contents + h->plt.offset + 12);
2198 /* Fill in the entry in the global offset table. */
2199 bfd_put_32 (output_bfd,
2200 (htab->splt->output_section->vma
2201 + htab->splt->output_offset
2204 htab->sgotplt->contents + got_offset);
2206 /* Fill in the entry in the .rel.plt section. */
2207 rel.r_offset = (htab->sgotplt->output_section->vma
2208 + htab->sgotplt->output_offset
2210 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
2211 loc = (Elf32_External_Rel *) htab->srelplt->contents + plt_index;
2212 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
2214 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2216 /* Mark the symbol as undefined, rather than as defined in
2217 the .plt section. Leave the value alone. This is a clue
2218 for the dynamic linker, to make function pointer
2219 comparisons work between an application and shared
2221 sym->st_shndx = SHN_UNDEF;
2225 if (h->got.offset != (bfd_vma) -1)
2227 Elf_Internal_Rel rel;
2228 Elf32_External_Rel *loc;
2230 /* This symbol has an entry in the global offset table. Set it
2233 if (htab->sgot == NULL || htab->srelgot == NULL)
2236 rel.r_offset = (htab->sgot->output_section->vma
2237 + htab->sgot->output_offset
2238 + (h->got.offset & ~(bfd_vma) 1));
2240 /* If this is a static link, or it is a -Bsymbolic link and the
2241 symbol is defined locally or was forced to be local because
2242 of a version file, we just want to emit a RELATIVE reloc.
2243 The entry in the global offset table will already have been
2244 initialized in the relocate_section function. */
2248 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2249 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2251 BFD_ASSERT((h->got.offset & 1) != 0);
2252 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2256 BFD_ASSERT((h->got.offset & 1) == 0);
2257 bfd_put_32 (output_bfd, (bfd_vma) 0,
2258 htab->sgot->contents + h->got.offset);
2259 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
2262 loc = (Elf32_External_Rel *) htab->srelgot->contents;
2263 loc += htab->srelgot->reloc_count++;
2264 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
2267 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
2269 Elf_Internal_Rel rel;
2270 Elf32_External_Rel *loc;
2272 /* This symbol needs a copy reloc. Set it up. */
2274 if (h->dynindx == -1
2275 || (h->root.type != bfd_link_hash_defined
2276 && h->root.type != bfd_link_hash_defweak)
2277 || htab->srelbss == NULL)
2280 rel.r_offset = (h->root.u.def.value
2281 + h->root.u.def.section->output_section->vma
2282 + h->root.u.def.section->output_offset);
2283 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
2284 loc = (Elf32_External_Rel *) htab->srelbss->contents;
2285 loc += htab->srelbss->reloc_count++;
2286 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
2289 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2290 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2291 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2292 sym->st_shndx = SHN_ABS;
2297 /* Used to decide how to sort relocs in an optimal manner for the
2298 dynamic linker, before writing them out. */
2300 static enum elf_reloc_type_class
2301 elf_i386_reloc_type_class (rela)
2302 const Elf_Internal_Rela *rela;
2304 switch ((int) ELF32_R_TYPE (rela->r_info))
2306 case R_386_RELATIVE:
2307 return reloc_class_relative;
2308 case R_386_JUMP_SLOT:
2309 return reloc_class_plt;
2311 return reloc_class_copy;
2313 return reloc_class_normal;
2317 /* Finish up the dynamic sections. */
2320 elf_i386_finish_dynamic_sections (output_bfd, info)
2322 struct bfd_link_info *info;
2324 struct elf_i386_link_hash_table *htab;
2328 htab = elf_i386_hash_table (info);
2329 dynobj = htab->elf.dynobj;
2330 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2332 if (htab->elf.dynamic_sections_created)
2334 Elf32_External_Dyn *dyncon, *dynconend;
2336 if (sdyn == NULL || htab->sgot == NULL)
2339 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2340 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2341 for (; dyncon < dynconend; dyncon++)
2343 Elf_Internal_Dyn dyn;
2346 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2354 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
2358 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
2362 s = htab->srelplt->output_section;
2363 if (s->_cooked_size != 0)
2364 dyn.d_un.d_val = s->_cooked_size;
2366 dyn.d_un.d_val = s->_raw_size;
2370 /* My reading of the SVR4 ABI indicates that the
2371 procedure linkage table relocs (DT_JMPREL) should be
2372 included in the overall relocs (DT_REL). This is
2373 what Solaris does. However, UnixWare can not handle
2374 that case. Therefore, we override the DT_RELSZ entry
2375 here to make it not include the JMPREL relocs. Since
2376 the linker script arranges for .rel.plt to follow all
2377 other relocation sections, we don't have to worry
2378 about changing the DT_REL entry. */
2379 if (htab->srelplt != NULL)
2381 s = htab->srelplt->output_section;
2382 if (s->_cooked_size != 0)
2383 dyn.d_un.d_val -= s->_cooked_size;
2385 dyn.d_un.d_val -= s->_raw_size;
2390 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2393 /* Fill in the first entry in the procedure linkage table. */
2394 if (htab->splt && htab->splt->_raw_size > 0)
2397 memcpy (htab->splt->contents,
2398 elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE);
2401 memcpy (htab->splt->contents,
2402 elf_i386_plt0_entry, PLT_ENTRY_SIZE);
2403 bfd_put_32 (output_bfd,
2404 (htab->sgotplt->output_section->vma
2405 + htab->sgotplt->output_offset
2407 htab->splt->contents + 2);
2408 bfd_put_32 (output_bfd,
2409 (htab->sgotplt->output_section->vma
2410 + htab->sgotplt->output_offset
2412 htab->splt->contents + 8);
2415 /* UnixWare sets the entsize of .plt to 4, although that doesn't
2416 really seem like the right value. */
2417 elf_section_data (htab->splt->output_section)
2418 ->this_hdr.sh_entsize = 4;
2424 /* Fill in the first three entries in the global offset table. */
2425 if (htab->sgotplt->_raw_size > 0)
2427 bfd_put_32 (output_bfd,
2428 (sdyn == NULL ? (bfd_vma) 0
2429 : sdyn->output_section->vma + sdyn->output_offset),
2430 htab->sgotplt->contents);
2431 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
2432 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
2435 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
2440 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
2441 #define TARGET_LITTLE_NAME "elf32-i386"
2442 #define ELF_ARCH bfd_arch_i386
2443 #define ELF_MACHINE_CODE EM_386
2444 #define ELF_MAXPAGESIZE 0x1000
2446 #define elf_backend_can_gc_sections 1
2447 #define elf_backend_can_refcount 1
2448 #define elf_backend_want_got_plt 1
2449 #define elf_backend_plt_readonly 1
2450 #define elf_backend_want_plt_sym 0
2451 #define elf_backend_got_header_size 12
2452 #define elf_backend_plt_header_size PLT_ENTRY_SIZE
2454 #define elf_info_to_howto elf_i386_info_to_howto
2455 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
2457 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
2458 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
2459 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
2461 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
2462 #define elf_backend_check_relocs elf_i386_check_relocs
2463 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
2464 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
2465 #define elf_backend_fake_sections elf_i386_fake_sections
2466 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
2467 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
2468 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
2469 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
2470 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
2471 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
2472 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
2473 #define elf_backend_relocate_section elf_i386_relocate_section
2474 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
2476 #include "elf32-target.h"