Change 'partial_inplace' to true (this target uses REL relocations) and
[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
CommitLineData
252b5132 1/* Intel 80386/80486-specific support for 32-bit ELF
7898deda 2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
638632bd 3 Free Software Foundation, Inc.
252b5132
RH
4
5This file is part of BFD, the Binary File Descriptor library.
6
7This program is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2 of the License, or
10(at your option) any later version.
11
12This program is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with this program; if not, write to the Free Software
19Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21#include "bfd.h"
22#include "sysdep.h"
23#include "bfdlink.h"
24#include "libbfd.h"
25#include "elf-bfd.h"
26
27static reloc_howto_type *elf_i386_reloc_type_lookup
28 PARAMS ((bfd *, bfd_reloc_code_real_type));
29static void elf_i386_info_to_howto
30 PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
31static void elf_i386_info_to_howto_rel
32 PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
33static boolean elf_i386_is_local_label_name PARAMS ((bfd *, const char *));
34static struct bfd_hash_entry *elf_i386_link_hash_newfunc
35 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
36static struct bfd_link_hash_table *elf_i386_link_hash_table_create
37 PARAMS ((bfd *));
6725bdbf
AM
38static boolean create_got_section PARAMS((bfd *, struct bfd_link_info *));
39static boolean elf_i386_create_dynamic_sections
40 PARAMS((bfd *, struct bfd_link_info *));
252b5132
RH
41static boolean elf_i386_check_relocs
42 PARAMS ((bfd *, struct bfd_link_info *, asection *,
43 const Elf_Internal_Rela *));
44static boolean elf_i386_adjust_dynamic_symbol
45 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
12d0ee4a 46static boolean allocate_plt_and_got_and_discard_relocs
6725bdbf 47 PARAMS ((struct elf_link_hash_entry *, PTR));
252b5132
RH
48static boolean elf_i386_size_dynamic_sections
49 PARAMS ((bfd *, struct bfd_link_info *));
50static boolean elf_i386_relocate_section
51 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
52 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
53static boolean elf_i386_finish_dynamic_symbol
54 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
55 Elf_Internal_Sym *));
56static boolean elf_i386_finish_dynamic_sections
57 PARAMS ((bfd *, struct bfd_link_info *));
58
59#define USE_REL 1 /* 386 uses REL relocations instead of RELA */
60
61#include "elf/i386.h"
62
63static reloc_howto_type elf_howto_table[]=
64{
1b452ec6
AM
65 HOWTO(R_386_NONE, 0, 0, 0, false, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_386_NONE",
67 true, 0x00000000, 0x00000000, false),
68 HOWTO(R_386_32, 0, 2, 32, false, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_386_32",
70 true, 0xffffffff, 0xffffffff, false),
71 HOWTO(R_386_PC32, 0, 2, 32, true, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_386_PC32",
73 true, 0xffffffff, 0xffffffff, true),
74 HOWTO(R_386_GOT32, 0, 2, 32, false, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_386_GOT32",
76 true, 0xffffffff, 0xffffffff, false),
77 HOWTO(R_386_PLT32, 0, 2, 32, true, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_386_PLT32",
79 true, 0xffffffff, 0xffffffff, true),
80 HOWTO(R_386_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_386_COPY",
82 true, 0xffffffff, 0xffffffff, false),
83 HOWTO(R_386_GLOB_DAT, 0, 2, 32, false, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
85 true, 0xffffffff, 0xffffffff, false),
86 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, false, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
88 true, 0xffffffff, 0xffffffff, false),
89 HOWTO(R_386_RELATIVE, 0, 2, 32, false, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_386_RELATIVE",
91 true, 0xffffffff, 0xffffffff, false),
92 HOWTO(R_386_GOTOFF, 0, 2, 32, false, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_386_GOTOFF",
94 true, 0xffffffff, 0xffffffff, false),
95 HOWTO(R_386_GOTPC, 0, 2, 32, true, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_386_GOTPC",
97 true, 0xffffffff, 0xffffffff, true),
98
dc47f327
AM
99 /* We have a gap in the reloc numbers here.
100 R_386_standard counts the number up to this point, and
101 R_386_ext_offset is the value to subtract from a reloc type of
102 R_386_16 thru R_386_PC8 to form an index into this table. */
1b452ec6
AM
103#define R_386_standard ((unsigned int) R_386_GOTPC + 1)
104#define R_386_ext_offset ((unsigned int) R_386_16 - R_386_standard)
105
252b5132 106 /* The remaining relocs are a GNU extension. */
1b452ec6
AM
107 HOWTO(R_386_16, 0, 1, 16, false, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_386_16",
109 true, 0xffff, 0xffff, false),
110 HOWTO(R_386_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_386_PC16",
112 true, 0xffff, 0xffff, true),
113 HOWTO(R_386_8, 0, 0, 8, false, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_386_8",
115 true, 0xff, 0xff, false),
116 HOWTO(R_386_PC8, 0, 0, 8, true, 0, complain_overflow_signed,
117 bfd_elf_generic_reloc, "R_386_PC8",
dc47f327
AM
118 true, 0xff, 0xff, true),
119
120 /* Another gap. */
121#define R_386_ext ((unsigned int) R_386_PC8 + 1 - R_386_ext_offset)
122#define R_386_vt_offset ((unsigned int) R_386_GNU_VTINHERIT - R_386_ext)
252b5132
RH
123
124/* GNU extension to record C++ vtable hierarchy. */
252b5132
RH
125 HOWTO (R_386_GNU_VTINHERIT, /* type */
126 0, /* rightshift */
127 2, /* size (0 = byte, 1 = short, 2 = long) */
128 0, /* bitsize */
129 false, /* pc_relative */
130 0, /* bitpos */
131 complain_overflow_dont, /* complain_on_overflow */
132 NULL, /* special_function */
133 "R_386_GNU_VTINHERIT", /* name */
134 false, /* partial_inplace */
135 0, /* src_mask */
136 0, /* dst_mask */
dc47f327 137 false),
252b5132
RH
138
139/* GNU extension to record C++ vtable member usage. */
252b5132
RH
140 HOWTO (R_386_GNU_VTENTRY, /* type */
141 0, /* rightshift */
142 2, /* size (0 = byte, 1 = short, 2 = long) */
143 0, /* bitsize */
144 false, /* pc_relative */
145 0, /* bitpos */
146 complain_overflow_dont, /* complain_on_overflow */
147 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
148 "R_386_GNU_VTENTRY", /* name */
149 false, /* partial_inplace */
150 0, /* src_mask */
151 0, /* dst_mask */
dc47f327
AM
152 false)
153
154#define R_386_vt ((unsigned int) R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
155
156};
157
252b5132
RH
158#ifdef DEBUG_GEN_RELOC
159#define TRACE(str) fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
160#else
161#define TRACE(str)
162#endif
163
164static reloc_howto_type *
165elf_i386_reloc_type_lookup (abfd, code)
7442e600 166 bfd *abfd ATTRIBUTE_UNUSED;
252b5132
RH
167 bfd_reloc_code_real_type code;
168{
169 switch (code)
170 {
171 case BFD_RELOC_NONE:
172 TRACE ("BFD_RELOC_NONE");
1b452ec6 173 return &elf_howto_table[(unsigned int) R_386_NONE ];
252b5132
RH
174
175 case BFD_RELOC_32:
176 TRACE ("BFD_RELOC_32");
1b452ec6 177 return &elf_howto_table[(unsigned int) R_386_32 ];
252b5132
RH
178
179 case BFD_RELOC_CTOR:
180 TRACE ("BFD_RELOC_CTOR");
1b452ec6 181 return &elf_howto_table[(unsigned int) R_386_32 ];
252b5132
RH
182
183 case BFD_RELOC_32_PCREL:
184 TRACE ("BFD_RELOC_PC32");
1b452ec6 185 return &elf_howto_table[(unsigned int) R_386_PC32 ];
252b5132
RH
186
187 case BFD_RELOC_386_GOT32:
188 TRACE ("BFD_RELOC_386_GOT32");
1b452ec6 189 return &elf_howto_table[(unsigned int) R_386_GOT32 ];
252b5132
RH
190
191 case BFD_RELOC_386_PLT32:
192 TRACE ("BFD_RELOC_386_PLT32");
1b452ec6 193 return &elf_howto_table[(unsigned int) R_386_PLT32 ];
252b5132
RH
194
195 case BFD_RELOC_386_COPY:
196 TRACE ("BFD_RELOC_386_COPY");
1b452ec6 197 return &elf_howto_table[(unsigned int) R_386_COPY ];
252b5132
RH
198
199 case BFD_RELOC_386_GLOB_DAT:
200 TRACE ("BFD_RELOC_386_GLOB_DAT");
1b452ec6 201 return &elf_howto_table[(unsigned int) R_386_GLOB_DAT ];
252b5132
RH
202
203 case BFD_RELOC_386_JUMP_SLOT:
204 TRACE ("BFD_RELOC_386_JUMP_SLOT");
1b452ec6 205 return &elf_howto_table[(unsigned int) R_386_JUMP_SLOT ];
252b5132
RH
206
207 case BFD_RELOC_386_RELATIVE:
208 TRACE ("BFD_RELOC_386_RELATIVE");
1b452ec6 209 return &elf_howto_table[(unsigned int) R_386_RELATIVE ];
252b5132
RH
210
211 case BFD_RELOC_386_GOTOFF:
212 TRACE ("BFD_RELOC_386_GOTOFF");
1b452ec6 213 return &elf_howto_table[(unsigned int) R_386_GOTOFF ];
252b5132
RH
214
215 case BFD_RELOC_386_GOTPC:
216 TRACE ("BFD_RELOC_386_GOTPC");
1b452ec6 217 return &elf_howto_table[(unsigned int) R_386_GOTPC ];
252b5132
RH
218
219 /* The remaining relocs are a GNU extension. */
220 case BFD_RELOC_16:
221 TRACE ("BFD_RELOC_16");
1b452ec6 222 return &elf_howto_table[(unsigned int) R_386_16 - R_386_ext_offset];
252b5132
RH
223
224 case BFD_RELOC_16_PCREL:
225 TRACE ("BFD_RELOC_16_PCREL");
1b452ec6 226 return &elf_howto_table[(unsigned int) R_386_PC16 - R_386_ext_offset];
252b5132
RH
227
228 case BFD_RELOC_8:
229 TRACE ("BFD_RELOC_8");
1b452ec6 230 return &elf_howto_table[(unsigned int) R_386_8 - R_386_ext_offset];
252b5132
RH
231
232 case BFD_RELOC_8_PCREL:
233 TRACE ("BFD_RELOC_8_PCREL");
1b452ec6 234 return &elf_howto_table[(unsigned int) R_386_PC8 - R_386_ext_offset];
252b5132
RH
235
236 case BFD_RELOC_VTABLE_INHERIT:
237 TRACE ("BFD_RELOC_VTABLE_INHERIT");
dc47f327
AM
238 return &elf_howto_table[(unsigned int) R_386_GNU_VTINHERIT
239 - R_386_vt_offset];
252b5132
RH
240
241 case BFD_RELOC_VTABLE_ENTRY:
242 TRACE ("BFD_RELOC_VTABLE_ENTRY");
dc47f327
AM
243 return &elf_howto_table[(unsigned int) R_386_GNU_VTENTRY
244 - R_386_vt_offset];
252b5132
RH
245
246 default:
247 break;
248 }
249
250 TRACE ("Unknown");
251 return 0;
252}
253
254static void
255elf_i386_info_to_howto (abfd, cache_ptr, dst)
7442e600
ILT
256 bfd *abfd ATTRIBUTE_UNUSED;
257 arelent *cache_ptr ATTRIBUTE_UNUSED;
258 Elf32_Internal_Rela *dst ATTRIBUTE_UNUSED;
252b5132
RH
259{
260 abort ();
261}
262
263static void
264elf_i386_info_to_howto_rel (abfd, cache_ptr, dst)
7442e600 265 bfd *abfd ATTRIBUTE_UNUSED;
252b5132
RH
266 arelent *cache_ptr;
267 Elf32_Internal_Rel *dst;
268{
dc47f327
AM
269 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
270 unsigned int indx;
271
272 if ((indx = r_type) >= R_386_standard
273 && ((indx = r_type - R_386_ext_offset) - R_386_standard
274 >= R_386_ext - R_386_standard)
275 && ((indx = r_type - R_386_vt_offset) - R_386_ext
276 >= R_386_vt - R_386_ext))
252b5132 277 {
dc47f327
AM
278 (*_bfd_error_handler) (_("%s: invalid relocation type %d"),
279 bfd_get_filename (abfd), (int) r_type);
280 indx = (unsigned int) R_386_NONE;
252b5132 281 }
dc47f327 282 cache_ptr->howto = &elf_howto_table[indx];
252b5132
RH
283}
284
285/* Return whether a symbol name implies a local label. The UnixWare
286 2.1 cc generates temporary symbols that start with .X, so we
287 recognize them here. FIXME: do other SVR4 compilers also use .X?.
288 If so, we should move the .X recognition into
289 _bfd_elf_is_local_label_name. */
290
291static boolean
292elf_i386_is_local_label_name (abfd, name)
293 bfd *abfd;
294 const char *name;
295{
296 if (name[0] == '.' && name[1] == 'X')
297 return true;
298
299 return _bfd_elf_is_local_label_name (abfd, name);
300}
301\f
302/* Functions for the i386 ELF linker. */
303
304/* The name of the dynamic interpreter. This is put in the .interp
305 section. */
306
307#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
308
309/* The size in bytes of an entry in the procedure linkage table. */
310
311#define PLT_ENTRY_SIZE 16
312
313/* The first entry in an absolute procedure linkage table looks like
314 this. See the SVR4 ABI i386 supplement to see how this works. */
315
316static const bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] =
317{
318 0xff, 0x35, /* pushl contents of address */
319 0, 0, 0, 0, /* replaced with address of .got + 4. */
320 0xff, 0x25, /* jmp indirect */
321 0, 0, 0, 0, /* replaced with address of .got + 8. */
322 0, 0, 0, 0 /* pad out to 16 bytes. */
323};
324
325/* Subsequent entries in an absolute procedure linkage table look like
326 this. */
327
328static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
329{
330 0xff, 0x25, /* jmp indirect */
331 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
332 0x68, /* pushl immediate */
333 0, 0, 0, 0, /* replaced with offset into relocation table. */
334 0xe9, /* jmp relative */
335 0, 0, 0, 0 /* replaced with offset to start of .plt. */
336};
337
338/* The first entry in a PIC procedure linkage table look like this. */
339
340static const bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] =
341{
342 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
343 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
344 0, 0, 0, 0 /* pad out to 16 bytes. */
345};
346
347/* Subsequent entries in a PIC procedure linkage table look like this. */
348
349static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
350{
351 0xff, 0xa3, /* jmp *offset(%ebx) */
352 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
353 0x68, /* pushl immediate */
354 0, 0, 0, 0, /* replaced with offset into relocation table. */
355 0xe9, /* jmp relative */
356 0, 0, 0, 0 /* replaced with offset to start of .plt. */
357};
358
359/* The i386 linker needs to keep track of the number of relocs that it
ffb2e45b
AM
360 decides to copy as dynamic relocs in check_relocs for each symbol.
361 This is so that it can later discard them if they are found to be
362 unnecessary. We store the information in a field extending the
363 regular ELF linker hash table. */
252b5132 364
ffb2e45b 365struct elf_i386_dyn_relocs
252b5132
RH
366{
367 /* Next section. */
ffb2e45b 368 struct elf_i386_dyn_relocs *next;
252b5132
RH
369 /* A section in dynobj. */
370 asection *section;
371 /* Number of relocs copied in this section. */
372 bfd_size_type count;
373};
374
375/* i386 ELF linker hash entry. */
376
377struct elf_i386_link_hash_entry
378{
379 struct elf_link_hash_entry root;
380
381 /* Number of PC relative relocs copied for this symbol. */
ffb2e45b 382 struct elf_i386_dyn_relocs *dyn_relocs;
252b5132
RH
383};
384
385/* i386 ELF linker hash table. */
386
387struct elf_i386_link_hash_table
388{
389 struct elf_link_hash_table root;
252b5132 390
6725bdbf
AM
391 /* Short-cuts to get to dynamic linker sections. */
392 asection *sgot;
393 asection *sgotplt;
394 asection *srelgot;
395 asection *splt;
396 asection *srelplt;
397 asection *sdynbss;
398 asection *srelbss;
399};
252b5132
RH
400
401/* Get the i386 ELF linker hash table from a link_info structure. */
402
403#define elf_i386_hash_table(p) \
404 ((struct elf_i386_link_hash_table *) ((p)->hash))
405
406/* Create an entry in an i386 ELF linker hash table. */
407
408static struct bfd_hash_entry *
409elf_i386_link_hash_newfunc (entry, table, string)
410 struct bfd_hash_entry *entry;
411 struct bfd_hash_table *table;
412 const char *string;
413{
414 struct elf_i386_link_hash_entry *ret =
415 (struct elf_i386_link_hash_entry *) entry;
416
417 /* Allocate the structure if it has not already been allocated by a
418 subclass. */
419 if (ret == (struct elf_i386_link_hash_entry *) NULL)
420 ret = ((struct elf_i386_link_hash_entry *)
421 bfd_hash_allocate (table,
422 sizeof (struct elf_i386_link_hash_entry)));
423 if (ret == (struct elf_i386_link_hash_entry *) NULL)
424 return (struct bfd_hash_entry *) ret;
425
426 /* Call the allocation method of the superclass. */
427 ret = ((struct elf_i386_link_hash_entry *)
428 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
429 table, string));
430 if (ret != (struct elf_i386_link_hash_entry *) NULL)
431 {
ffb2e45b 432 ret->dyn_relocs = NULL;
252b5132
RH
433 }
434
435 return (struct bfd_hash_entry *) ret;
436}
437
438/* Create an i386 ELF linker hash table. */
439
440static struct bfd_link_hash_table *
441elf_i386_link_hash_table_create (abfd)
442 bfd *abfd;
443{
444 struct elf_i386_link_hash_table *ret;
445
446 ret = ((struct elf_i386_link_hash_table *)
447 bfd_alloc (abfd, sizeof (struct elf_i386_link_hash_table)));
448 if (ret == (struct elf_i386_link_hash_table *) NULL)
449 return NULL;
450
451 if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
452 elf_i386_link_hash_newfunc))
453 {
454 bfd_release (abfd, ret);
455 return NULL;
456 }
457
6725bdbf
AM
458 ret->sgot = NULL;
459 ret->sgotplt = NULL;
460 ret->srelgot = NULL;
461 ret->splt = NULL;
462 ret->srelplt = NULL;
463 ret->sdynbss = NULL;
464 ret->srelbss = NULL;
465
252b5132
RH
466 return &ret->root.root;
467}
468
6725bdbf
AM
469/* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
470 shortcuts to them in our hash table. */
471
472static boolean
473create_got_section (dynobj, info)
474 bfd *dynobj;
475 struct bfd_link_info *info;
476{
477 struct elf_i386_link_hash_table *htab;
478
479 if (! _bfd_elf_create_got_section (dynobj, info))
480 return false;
481
482 htab = elf_i386_hash_table (info);
483 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
484 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
485 if (!htab->sgot || !htab->sgotplt)
486 abort ();
487
488 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
489 if (htab->srelgot == NULL
490 || ! bfd_set_section_flags (dynobj, htab->srelgot,
491 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
492 | SEC_IN_MEMORY | SEC_LINKER_CREATED
493 | SEC_READONLY))
494 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
495 return false;
496 return true;
497}
498
499/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
500 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
501 hash table. */
502
503static boolean
504elf_i386_create_dynamic_sections (dynobj, info)
505 bfd *dynobj;
506 struct bfd_link_info *info;
507{
508 struct elf_i386_link_hash_table *htab;
509
510 htab = elf_i386_hash_table (info);
511 if (!htab->sgot && !create_got_section (dynobj, info))
512 return false;
513
514 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
515 return false;
516
517 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
518 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
519 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
520 if (!info->shared)
521 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
522
523 if (!htab->splt || !htab->srelplt || !htab->sdynbss
524 || (!info->shared && !htab->srelbss))
525 abort ();
526
527 return true;
528}
529
252b5132
RH
530/* Look through the relocs for a section during the first phase, and
531 allocate space in the global offset table or procedure linkage
532 table. */
533
534static boolean
535elf_i386_check_relocs (abfd, info, sec, relocs)
536 bfd *abfd;
537 struct bfd_link_info *info;
538 asection *sec;
539 const Elf_Internal_Rela *relocs;
540{
6725bdbf 541 struct elf_i386_link_hash_table *htab;
252b5132
RH
542 bfd *dynobj;
543 Elf_Internal_Shdr *symtab_hdr;
544 struct elf_link_hash_entry **sym_hashes;
dd5724d5 545 bfd_signed_vma *local_got_refcounts;
252b5132
RH
546 const Elf_Internal_Rela *rel;
547 const Elf_Internal_Rela *rel_end;
252b5132
RH
548 asection *sreloc;
549
550 if (info->relocateable)
551 return true;
552
6725bdbf
AM
553 htab = elf_i386_hash_table (info);
554 dynobj = htab->root.dynobj;
252b5132
RH
555 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
556 sym_hashes = elf_sym_hashes (abfd);
dd5724d5 557 local_got_refcounts = elf_local_got_refcounts (abfd);
252b5132 558
252b5132
RH
559 sreloc = NULL;
560
561 rel_end = relocs + sec->reloc_count;
562 for (rel = relocs; rel < rel_end; rel++)
563 {
564 unsigned long r_symndx;
565 struct elf_link_hash_entry *h;
566
567 r_symndx = ELF32_R_SYM (rel->r_info);
568
d9bc7a44 569 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454
L
570 {
571 if (abfd->my_archive)
572 (*_bfd_error_handler) (_("%s(%s): bad symbol index: %d"),
573 bfd_get_filename (abfd->my_archive),
574 bfd_get_filename (abfd),
575 r_symndx);
576 else
577 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
578 bfd_get_filename (abfd),
579 r_symndx);
580 return false;
581 }
582
252b5132
RH
583 if (r_symndx < symtab_hdr->sh_info)
584 h = NULL;
585 else
586 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
587
588 /* Some relocs require a global offset table. */
12d0ee4a 589 if (htab->sgot == NULL)
252b5132
RH
590 {
591 switch (ELF32_R_TYPE (rel->r_info))
592 {
593 case R_386_GOT32:
594 case R_386_GOTOFF:
595 case R_386_GOTPC:
12d0ee4a
AM
596 if (dynobj == NULL)
597 htab->root.dynobj = dynobj = abfd;
6725bdbf 598 if (!create_got_section (dynobj, info))
252b5132
RH
599 return false;
600 break;
601
602 default:
603 break;
604 }
605 }
606
607 switch (ELF32_R_TYPE (rel->r_info))
608 {
609 case R_386_GOT32:
610 /* This symbol requires a global offset table entry. */
252b5132
RH
611 if (h != NULL)
612 {
dd5724d5 613 if (h->got.refcount == -1)
5a15f56f 614 h->got.refcount = 1;
dd5724d5
AM
615 else
616 h->got.refcount += 1;
252b5132
RH
617 }
618 else
619 {
83be169b 620 /* This is a global offset table entry for a local symbol. */
dd5724d5 621 if (local_got_refcounts == NULL)
252b5132
RH
622 {
623 size_t size;
252b5132 624
dd5724d5
AM
625 size = symtab_hdr->sh_info * sizeof (bfd_signed_vma);
626 local_got_refcounts = ((bfd_signed_vma *)
627 bfd_alloc (abfd, size));
628 if (local_got_refcounts == NULL)
252b5132 629 return false;
dd5724d5
AM
630 elf_local_got_refcounts (abfd) = local_got_refcounts;
631 memset (local_got_refcounts, -1, size);
252b5132 632 }
dd5724d5 633 if (local_got_refcounts[r_symndx] == -1)
6725bdbf 634 local_got_refcounts[r_symndx] = 1;
dd5724d5
AM
635 else
636 local_got_refcounts[r_symndx] += 1;
252b5132 637 }
252b5132
RH
638 break;
639
640 case R_386_PLT32:
641 /* This symbol requires a procedure linkage table entry. We
83be169b
AM
642 actually build the entry in adjust_dynamic_symbol,
643 because this might be a case of linking PIC code which is
644 never referenced by a dynamic object, in which case we
645 don't need to generate a procedure linkage table entry
646 after all. */
252b5132
RH
647
648 /* If this is a local symbol, we resolve it directly without
83be169b 649 creating a procedure linkage table entry. */
252b5132
RH
650 if (h == NULL)
651 continue;
652
dd5724d5
AM
653 if (h->plt.refcount == -1)
654 {
dd5724d5 655 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
6725bdbf 656 h->plt.refcount = 1;
dd5724d5
AM
657 }
658 else
659 h->plt.refcount += 1;
252b5132
RH
660 break;
661
662 case R_386_32:
663 case R_386_PC32:
12d0ee4a 664 if (h != NULL && !info->shared)
6725bdbf 665 {
12d0ee4a
AM
666 /* If this reloc is in a read-only section, we might
667 need a copy reloc. */
668 if ((sec->flags & SEC_READONLY) != 0)
669 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
670
671 /* We may need a .plt entry if the function this reloc
672 refers to is in a shared lib. */
673 if (h->plt.refcount == -1)
674 h->plt.refcount = 1;
675 else
676 h->plt.refcount += 1;
6725bdbf 677 }
7843f00e 678
252b5132 679 /* If we are creating a shared library, and this is a reloc
f69da49f
AM
680 against a global symbol, or a non PC relative reloc
681 against a local symbol, then we need to copy the reloc
682 into the shared library. However, if we are linking with
683 -Bsymbolic, we do not need to copy a reloc against a
684 global symbol which is defined in an object we are
685 including in the link (i.e., DEF_REGULAR is set). At
686 this point we have not seen all the input files, so it is
687 possible that DEF_REGULAR is not set now but will be set
1f655a09
L
688 later (it is never cleared). In case of a weak definition,
689 DEF_REGULAR may be cleared later by a strong definition in
690 a shared library. We account for that possibility below by
691 storing information in the relocs_copied field of the hash
692 table entry. A similar situation occurs when creating
693 shared libraries and symbol visibility changes render the
12d0ee4a
AM
694 symbol local.
695 If on the other hand, we are creating an executable, we
696 may need to keep relocations for symbols satisfied by a
697 dynamic library if we manage to avoid copy relocs for the
698 symbol. */
699 if ((info->shared
700 && (sec->flags & SEC_ALLOC) != 0
701 && (ELF32_R_TYPE (rel->r_info) != R_386_PC32
702 || (h != NULL
703 && (! info->symbolic
704 || h->root.type == bfd_link_hash_defweak
705 || (h->elf_link_hash_flags
706 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
707 || (!info->shared
708 && (sec->flags & SEC_ALLOC) != 0
709 && h != NULL
710 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
711 && (h->root.type == bfd_link_hash_defweak
712 || (h->elf_link_hash_flags
713 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
252b5132 714 {
12d0ee4a
AM
715 /* We must copy these reloc types into the output file.
716 Create a reloc section in dynobj and make room for
717 this reloc. */
718 if (dynobj == NULL)
719 htab->root.dynobj = dynobj = abfd;
28d0b90e 720
252b5132
RH
721 if (sreloc == NULL)
722 {
723 const char *name;
724
725 name = (bfd_elf_string_from_elf_section
726 (abfd,
727 elf_elfheader (abfd)->e_shstrndx,
728 elf_section_data (sec)->rel_hdr.sh_name));
729 if (name == NULL)
730 return false;
731
c8492176
L
732 if (strncmp (name, ".rel", 4) != 0
733 || strcmp (bfd_get_section_name (abfd, sec),
734 name + 4) != 0)
735 {
736 if (abfd->my_archive)
737 (*_bfd_error_handler) (_("%s(%s): bad relocation section name `%s\'"),
738 bfd_get_filename (abfd->my_archive),
739 bfd_get_filename (abfd),
740 name);
741 else
742 (*_bfd_error_handler) (_("%s: bad relocation section name `%s\'"),
743 bfd_get_filename (abfd),
744 name);
f5f31454 745 }
252b5132
RH
746
747 sreloc = bfd_get_section_by_name (dynobj, name);
748 if (sreloc == NULL)
749 {
750 flagword flags;
751
752 sreloc = bfd_make_section (dynobj, name);
753 flags = (SEC_HAS_CONTENTS | SEC_READONLY
754 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
755 if ((sec->flags & SEC_ALLOC) != 0)
756 flags |= SEC_ALLOC | SEC_LOAD;
757 if (sreloc == NULL
758 || ! bfd_set_section_flags (dynobj, sreloc, flags)
759 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
760 return false;
761 }
762 }
763
764 sreloc->_raw_size += sizeof (Elf32_External_Rel);
765
f69da49f
AM
766 /* If this is a global symbol, we count the number of PC
767 relative relocations we have entered for this symbol,
768 so that we can discard them later as necessary. Note
769 that this function is only called if we are using an
770 elf_i386 linker hash table, which means that h is
771 really a pointer to an elf_i386_link_hash_entry. */
12d0ee4a
AM
772 if (!info->shared
773 || (h != NULL
774 && ELF32_R_TYPE (rel->r_info) == R_386_PC32))
252b5132
RH
775 {
776 struct elf_i386_link_hash_entry *eh;
ffb2e45b 777 struct elf_i386_dyn_relocs *p;
252b5132
RH
778
779 eh = (struct elf_i386_link_hash_entry *) h;
780
ffb2e45b 781 for (p = eh->dyn_relocs; p != NULL; p = p->next)
252b5132
RH
782 if (p->section == sreloc)
783 break;
784
785 if (p == NULL)
786 {
ffb2e45b 787 p = ((struct elf_i386_dyn_relocs *)
252b5132
RH
788 bfd_alloc (dynobj, sizeof *p));
789 if (p == NULL)
790 return false;
ffb2e45b
AM
791 p->next = eh->dyn_relocs;
792 eh->dyn_relocs = p;
252b5132
RH
793 p->section = sreloc;
794 p->count = 0;
795 }
796
797 ++p->count;
798 }
799 }
800
801 break;
802
803 /* This relocation describes the C++ object vtable hierarchy.
804 Reconstruct it for later use during GC. */
805 case R_386_GNU_VTINHERIT:
806 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
807 return false;
808 break;
809
810 /* This relocation describes which C++ vtable entries are actually
811 used. Record for later use during GC. */
812 case R_386_GNU_VTENTRY:
813 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
814 return false;
815 break;
816
817 default:
818 break;
819 }
820 }
821
822 return true;
823}
824
825/* Return the section that should be marked against GC for a given
826 relocation. */
827
828static asection *
829elf_i386_gc_mark_hook (abfd, info, rel, h, sym)
830 bfd *abfd;
7442e600 831 struct bfd_link_info *info ATTRIBUTE_UNUSED;
252b5132
RH
832 Elf_Internal_Rela *rel;
833 struct elf_link_hash_entry *h;
834 Elf_Internal_Sym *sym;
835{
836 if (h != NULL)
837 {
838 switch (ELF32_R_TYPE (rel->r_info))
839 {
840 case R_386_GNU_VTINHERIT:
841 case R_386_GNU_VTENTRY:
842 break;
843
844 default:
845 switch (h->root.type)
846 {
847 case bfd_link_hash_defined:
848 case bfd_link_hash_defweak:
849 return h->root.u.def.section;
850
851 case bfd_link_hash_common:
852 return h->root.u.c.p->section;
853
854 default:
855 break;
856 }
857 }
858 }
859 else
860 {
861 if (!(elf_bad_symtab (abfd)
862 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
863 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
864 && sym->st_shndx != SHN_COMMON))
865 {
866 return bfd_section_from_elf_index (abfd, sym->st_shndx);
867 }
868 }
869
870 return NULL;
871}
872
873/* Update the got entry reference counts for the section being removed. */
874
875static boolean
876elf_i386_gc_sweep_hook (abfd, info, sec, relocs)
dd5724d5 877 bfd *abfd;
6725bdbf 878 struct bfd_link_info *info;
dd5724d5
AM
879 asection *sec;
880 const Elf_Internal_Rela *relocs;
252b5132 881{
dd5724d5
AM
882 Elf_Internal_Shdr *symtab_hdr;
883 struct elf_link_hash_entry **sym_hashes;
884 bfd_signed_vma *local_got_refcounts;
885 const Elf_Internal_Rela *rel, *relend;
886 unsigned long r_symndx;
887 struct elf_link_hash_entry *h;
888 bfd *dynobj;
dd5724d5
AM
889
890 dynobj = elf_hash_table (info)->dynobj;
891 if (dynobj == NULL)
892 return true;
893
6725bdbf
AM
894 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
895 sym_hashes = elf_sym_hashes (abfd);
896 local_got_refcounts = elf_local_got_refcounts (abfd);
dd5724d5
AM
897
898 relend = relocs + sec->reloc_count;
899 for (rel = relocs; rel < relend; rel++)
900 switch (ELF32_R_TYPE (rel->r_info))
901 {
902 case R_386_GOT32:
903 case R_386_GOTOFF:
904 case R_386_GOTPC:
905 r_symndx = ELF32_R_SYM (rel->r_info);
906 if (r_symndx >= symtab_hdr->sh_info)
907 {
908 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
909 if (h->got.refcount > 0)
6725bdbf 910 h->got.refcount -= 1;
dd5724d5
AM
911 }
912 else if (local_got_refcounts != NULL)
913 {
914 if (local_got_refcounts[r_symndx] > 0)
6725bdbf 915 local_got_refcounts[r_symndx] -= 1;
dd5724d5
AM
916 }
917 break;
918
6725bdbf
AM
919 case R_386_32:
920 case R_386_PC32:
921 if (info->shared)
922 break;
923 /* Fall through. */
924
dd5724d5
AM
925 case R_386_PLT32:
926 r_symndx = ELF32_R_SYM (rel->r_info);
927 if (r_symndx >= symtab_hdr->sh_info)
928 {
929 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
930 if (h->plt.refcount > 0)
931 h->plt.refcount -= 1;
932 }
933 break;
934
935 default:
936 break;
937 }
252b5132
RH
938
939 return true;
940}
941
942/* Adjust a symbol defined by a dynamic object and referenced by a
943 regular object. The current definition is in some section of the
944 dynamic object, but we're not including those sections. We have to
945 change the definition to something the rest of the link can
946 understand. */
947
948static boolean
949elf_i386_adjust_dynamic_symbol (info, h)
950 struct bfd_link_info *info;
951 struct elf_link_hash_entry *h;
952{
6725bdbf 953 struct elf_i386_link_hash_table *htab;
252b5132
RH
954 bfd *dynobj;
955 asection *s;
956 unsigned int power_of_two;
957
6725bdbf
AM
958 htab = elf_i386_hash_table (info);
959 dynobj = htab->root.dynobj;
252b5132 960
252b5132
RH
961 /* If this is a function, put it in the procedure linkage table. We
962 will fill in the contents of the procedure linkage table later,
963 when we know the address of the .got section. */
964 if (h->type == STT_FUNC
965 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
966 {
6725bdbf
AM
967 if (h->plt.refcount <= 0
968 || (! info->shared
969 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
970 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0))
252b5132
RH
971 {
972 /* This case can occur if we saw a PLT32 reloc in an input
dd5724d5
AM
973 file, but the symbol was never referred to by a dynamic
974 object, or if all references were garbage collected. In
975 such a case, we don't actually need to build a procedure
976 linkage table, and we can just do a PC32 reloc instead. */
6725bdbf 977 h->plt.refcount = (bfd_vma) -1;
dd5724d5 978 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
252b5132
RH
979 }
980
252b5132
RH
981 return true;
982 }
6725bdbf
AM
983 else
984 /* It's possible that we incorrectly decided a .plt reloc was
985 needed for an R_386_PC32 reloc to a non-function sym in
986 check_relocs. We can't decide accurately between function and
987 non-function syms in check-relocs; Objects loaded later in
988 the link may change h->type. So fix it now. */
989 h->plt.refcount = (bfd_vma) -1;
252b5132
RH
990
991 /* If this is a weak symbol, and there is a real definition, the
992 processor independent code will have arranged for us to see the
993 real definition first, and we can just use the same value. */
994 if (h->weakdef != NULL)
995 {
996 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
997 || h->weakdef->root.type == bfd_link_hash_defweak);
998 h->root.u.def.section = h->weakdef->root.u.def.section;
999 h->root.u.def.value = h->weakdef->root.u.def.value;
1000 return true;
1001 }
1002
1003 /* This is a reference to a symbol defined by a dynamic object which
1004 is not a function. */
1005
1006 /* If we are creating a shared library, we must presume that the
1007 only references to the symbol are via the global offset table.
1008 For such cases we need not do anything here; the relocations will
1009 be handled correctly by relocate_section. */
1010 if (info->shared)
1011 return true;
1012
7843f00e
ILT
1013 /* If there are no references to this symbol that do not use the
1014 GOT, we don't need to generate a copy reloc. */
1015 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1016 return true;
1017
252b5132
RH
1018 /* We must allocate the symbol in our .dynbss section, which will
1019 become part of the .bss section of the executable. There will be
1020 an entry for this symbol in the .dynsym section. The dynamic
1021 object will contain position independent code, so all references
1022 from the dynamic object to this symbol will go through the global
1023 offset table. The dynamic linker will use the .dynsym entry to
1024 determine the address it must put in the global offset table, so
1025 both the dynamic object and the regular object will refer to the
1026 same memory location for the variable. */
1027
6725bdbf 1028 s = htab->sdynbss;
ffb2e45b
AM
1029 if (s == NULL)
1030 abort ();
252b5132
RH
1031
1032 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1033 copy the initial value out of the dynamic object and into the
1034 runtime process image. We need to remember the offset into the
1035 .rel.bss section we are going to use. */
1036 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1037 {
1038 asection *srel;
1039
6725bdbf 1040 srel = htab->srelbss;
ffb2e45b
AM
1041 if (srel == NULL)
1042 abort ();
252b5132
RH
1043 srel->_raw_size += sizeof (Elf32_External_Rel);
1044 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1045 }
1046
1047 /* We need to figure out the alignment required for this symbol. I
1048 have no idea how ELF linkers handle this. */
1049 power_of_two = bfd_log2 (h->size);
1050 if (power_of_two > 3)
1051 power_of_two = 3;
1052
1053 /* Apply the required alignment. */
1054 s->_raw_size = BFD_ALIGN (s->_raw_size,
1055 (bfd_size_type) (1 << power_of_two));
1056 if (power_of_two > bfd_get_section_alignment (dynobj, s))
1057 {
1058 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
1059 return false;
1060 }
1061
1062 /* Define the symbol as being at this point in the section. */
1063 h->root.u.def.section = s;
1064 h->root.u.def.value = s->_raw_size;
1065
1066 /* Increment the section size to make room for the symbol. */
1067 s->_raw_size += h->size;
1068
1069 return true;
1070}
1071
6725bdbf
AM
1072/* This is the condition under which elf_i386_finish_dynamic_symbol
1073 will be called from elflink.h. If elflink.h doesn't call our
1074 finish_dynamic_symbol routine, we'll need to do something about
1075 initializing any .plt and .got entries in elf_i386_relocate_section. */
1076#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1077 ((DYN) \
1078 && ((INFO)->shared \
1079 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1080 && ((H)->dynindx != -1 \
1081 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1082
1083/* Allocate space in .plt, .got and associated reloc sections for
12d0ee4a
AM
1084 global syms. Also discards space allocated for relocs in the
1085 check_relocs function that we subsequently have found to be
1086 unneeded. */
6725bdbf
AM
1087
1088static boolean
12d0ee4a 1089allocate_plt_and_got_and_discard_relocs (h, inf)
6725bdbf
AM
1090 struct elf_link_hash_entry *h;
1091 PTR inf;
1092{
1093 struct bfd_link_info *info;
1094 struct elf_i386_link_hash_table *htab;
1095 asection *s;
5a15f56f 1096 struct elf_i386_link_hash_entry *eh;
6725bdbf
AM
1097
1098 if (h->root.type == bfd_link_hash_indirect
1099 || h->root.type == bfd_link_hash_warning)
1100 return true;
1101
1102 info = (struct bfd_link_info *) inf;
1103 htab = elf_i386_hash_table (info);
1104
1105 if (htab->root.dynamic_sections_created
1106 && h->plt.refcount > 0)
1107 {
5a15f56f
AM
1108 /* Make sure this symbol is output as a dynamic symbol.
1109 Undefined weak syms won't yet be marked as dynamic. */
1110 if (h->dynindx == -1
1111 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1112 {
1113 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1114 return false;
1115 }
1116
6725bdbf 1117 s = htab->splt;
ffb2e45b
AM
1118 if (s == NULL)
1119 abort ();
6725bdbf
AM
1120
1121 /* If this is the first .plt entry, make room for the special
1122 first entry. */
1123 if (s->_raw_size == 0)
1124 s->_raw_size += PLT_ENTRY_SIZE;
1125
1126 h->plt.offset = s->_raw_size;
1127
1128 /* If this symbol is not defined in a regular file, and we are
1129 not generating a shared library, then set the symbol to this
1130 location in the .plt. This is required to make function
1131 pointers compare as equal between the normal executable and
1132 the shared library. */
1133 if (! info->shared
1134 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1135 {
1136 h->root.u.def.section = s;
1137 h->root.u.def.value = h->plt.offset;
1138 }
1139
1140 /* Make room for this entry. */
1141 s->_raw_size += PLT_ENTRY_SIZE;
1142
1143 /* We also need to make an entry in the .got.plt section, which
1144 will be placed in the .got section by the linker script. */
1145 s = htab->sgotplt;
ffb2e45b
AM
1146 if (s == NULL)
1147 abort ();
6725bdbf
AM
1148 s->_raw_size += 4;
1149
1150 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
1151 {
1152 /* We also need to make an entry in the .rel.plt section. */
1153 s = htab->srelplt;
ffb2e45b
AM
1154 if (s == NULL)
1155 abort ();
6725bdbf
AM
1156 s->_raw_size += sizeof (Elf32_External_Rel);
1157 }
1158 }
1159 else
1160 {
1161 h->plt.offset = (bfd_vma) -1;
1162 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1163 }
1164
1165 if (h->got.refcount > 0)
1166 {
1167 boolean dyn;
1168
5a15f56f
AM
1169 /* Make sure this symbol is output as a dynamic symbol.
1170 Undefined weak syms won't yet be marked as dynamic. */
1171 if (h->dynindx == -1
1172 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1173 {
1174 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1175 return false;
1176 }
1177
6725bdbf
AM
1178 s = htab->sgot;
1179 h->got.offset = s->_raw_size;
1180 s->_raw_size += 4;
1181 dyn = htab->root.dynamic_sections_created;
1182 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
1183 htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
1184 }
1185 else
1186 h->got.offset = (bfd_vma) -1;
1187
5a15f56f
AM
1188 /* In the shared -Bsymbolic case, discard space allocated for
1189 dynamic relocs against symbols which turn out to be defined
12d0ee4a
AM
1190 in regular objects. For the normal shared case, discard space
1191 for relocs that have become local due to symbol visibility
1192 changes. For the non-shared case, discard space for symbols
1193 which turn out to need copy relocs or are not dynamic. */
1194
5a15f56f
AM
1195 eh = (struct elf_i386_link_hash_entry *) h;
1196 if (eh->dyn_relocs == NULL)
1197 return true;
1198
1199 if (!info->shared
1200 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1201 && ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
8e1d4bbb
AM
1202 || (htab->root.dynamic_sections_created
1203 && (h->root.type == bfd_link_hash_undefweak
1204 || h->root.type == bfd_link_hash_undefined))))
5a15f56f
AM
1205 {
1206 /* Make sure this symbol is output as a dynamic symbol.
1207 Undefined weak syms won't yet be marked as dynamic. */
1208 if (h->dynindx == -1
1209 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1210 {
1211 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1212 return false;
1213 }
1214
1215 /* If that succeeded, we know we'll be keeping all the relocs. */
1216 if (h->dynindx != -1)
1217 return true;
1218 }
1219
1220 if (!info->shared
1221 || ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1222 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
1223 || info->symbolic)))
12d0ee4a 1224 {
ffb2e45b 1225 struct elf_i386_dyn_relocs *c;
12d0ee4a 1226
ffb2e45b 1227 for (c = eh->dyn_relocs; c != NULL; c = c->next)
12d0ee4a
AM
1228 c->section->_raw_size -= c->count * sizeof (Elf32_External_Rel);
1229 }
1230
6725bdbf
AM
1231 return true;
1232}
1233
252b5132
RH
1234/* Set the sizes of the dynamic sections. */
1235
1236static boolean
1237elf_i386_size_dynamic_sections (output_bfd, info)
1238 bfd *output_bfd;
1239 struct bfd_link_info *info;
1240{
6725bdbf 1241 struct elf_i386_link_hash_table *htab;
252b5132
RH
1242 bfd *dynobj;
1243 asection *s;
252b5132
RH
1244 boolean relocs;
1245 boolean reltext;
161d71a6 1246 bfd *i;
252b5132 1247
6725bdbf
AM
1248 htab = elf_i386_hash_table (info);
1249 dynobj = htab->root.dynobj;
ffb2e45b
AM
1250 if (dynobj == NULL)
1251 abort ();
252b5132 1252
6725bdbf 1253 if (htab->root.dynamic_sections_created)
252b5132
RH
1254 {
1255 /* Set the contents of the .interp section to the interpreter. */
1256 if (! info->shared)
1257 {
1258 s = bfd_get_section_by_name (dynobj, ".interp");
ffb2e45b
AM
1259 if (s == NULL)
1260 abort ();
252b5132
RH
1261 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1262 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1263 }
161d71a6 1264 }
6725bdbf 1265
161d71a6
L
1266 /* Set up .got offsets for local syms. */
1267 for (i = info->input_bfds; i; i = i->link_next)
1268 {
1269 bfd_signed_vma *local_got;
1270 bfd_signed_vma *end_local_got;
1271 bfd_size_type locsymcount;
1272 Elf_Internal_Shdr *symtab_hdr;
1273 asection *srel;
6725bdbf 1274
161d71a6
L
1275 if (bfd_get_flavour (i) != bfd_target_elf_flavour)
1276 continue;
6725bdbf 1277
161d71a6
L
1278 local_got = elf_local_got_refcounts (i);
1279 if (!local_got)
1280 continue;
6725bdbf 1281
161d71a6
L
1282 symtab_hdr = &elf_tdata (i)->symtab_hdr;
1283 locsymcount = symtab_hdr->sh_info;
1284 end_local_got = local_got + locsymcount;
1285 s = htab->sgot;
1286 srel = htab->srelgot;
1287 for (; local_got < end_local_got; ++local_got)
1288 {
1289 if (*local_got > 0)
6725bdbf 1290 {
161d71a6
L
1291 *local_got = s->_raw_size;
1292 s->_raw_size += 4;
1293 if (info->shared)
1294 srel->_raw_size += sizeof (Elf32_External_Rel);
6725bdbf 1295 }
161d71a6
L
1296 else
1297 *local_got = (bfd_vma) -1;
6725bdbf 1298 }
252b5132 1299 }
6725bdbf 1300
12d0ee4a
AM
1301 /* Allocate global sym .plt and .got entries. Also discard all
1302 unneeded relocs. */
6725bdbf 1303 elf_link_hash_traverse (&htab->root,
12d0ee4a 1304 allocate_plt_and_got_and_discard_relocs,
6725bdbf 1305 (PTR) info);
252b5132 1306
5a15f56f
AM
1307 /* We now have determined the sizes of the various dynamic sections.
1308 Allocate memory for them. */
252b5132
RH
1309 relocs = false;
1310 reltext = false;
1311 for (s = dynobj->sections; s != NULL; s = s->next)
1312 {
252b5132
RH
1313 if ((s->flags & SEC_LINKER_CREATED) == 0)
1314 continue;
1315
6725bdbf
AM
1316 if (s == htab->splt
1317 || s == htab->sgot
1318 || s == htab->sgotplt)
252b5132 1319 {
6725bdbf
AM
1320 /* Strip this section if we don't need it; see the
1321 comment below. */
252b5132 1322 }
6725bdbf 1323 else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0)
252b5132
RH
1324 {
1325 if (s->_raw_size == 0)
1326 {
1327 /* If we don't need this section, strip it from the
1328 output file. This is mostly to handle .rel.bss and
1329 .rel.plt. We must create both sections in
1330 create_dynamic_sections, because they must be created
1331 before the linker maps input sections to output
1332 sections. The linker does that before
1333 adjust_dynamic_symbol is called, and it is that
1334 function which decides whether anything needs to go
1335 into these sections. */
252b5132
RH
1336 }
1337 else
1338 {
1339 asection *target;
1340
1341 /* Remember whether there are any reloc sections other
83be169b 1342 than .rel.plt. */
6725bdbf 1343 if (s != htab->srelplt)
252b5132
RH
1344 {
1345 const char *outname;
1346
1347 relocs = true;
1348
1349 /* If this relocation section applies to a read only
1350 section, then we probably need a DT_TEXTREL
1351 entry. The entries in the .rel.plt section
1352 really apply to the .got section, which we
1353 created ourselves and so know is not readonly. */
1354 outname = bfd_get_section_name (output_bfd,
1355 s->output_section);
1356 target = bfd_get_section_by_name (output_bfd, outname + 4);
1357 if (target != NULL
1358 && (target->flags & SEC_READONLY) != 0
1359 && (target->flags & SEC_ALLOC) != 0)
1360 reltext = true;
1361 }
1362
1363 /* We use the reloc_count field as a counter if we need
1364 to copy relocs into the output file. */
1365 s->reloc_count = 0;
1366 }
1367 }
6725bdbf 1368 else
252b5132
RH
1369 {
1370 /* It's not one of our sections, so don't allocate space. */
1371 continue;
1372 }
1373
6725bdbf 1374 if (s->_raw_size == 0)
252b5132 1375 {
7f8d5fc9 1376 _bfd_strip_section_from_output (info, s);
252b5132
RH
1377 continue;
1378 }
1379
f69da49f
AM
1380 /* Allocate memory for the section contents. We use bfd_zalloc
1381 here in case unused entries are not reclaimed before the
1382 section's contents are written out. This should not happen,
1383 but this way if it does, we get a R_386_NONE reloc instead
1384 of garbage. */
7a9af8c4 1385 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
6725bdbf 1386 if (s->contents == NULL)
252b5132
RH
1387 return false;
1388 }
1389
6725bdbf 1390 if (htab->root.dynamic_sections_created)
252b5132
RH
1391 {
1392 /* Add some entries to the .dynamic section. We fill in the
1393 values later, in elf_i386_finish_dynamic_sections, but we
1394 must add the entries now so that we get the correct size for
1395 the .dynamic section. The DT_DEBUG entry is filled in by the
1396 dynamic linker and used by the debugger. */
1397 if (! info->shared)
1398 {
1399 if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
1400 return false;
1401 }
1402
6725bdbf 1403 if (htab->splt->_raw_size != 0)
252b5132
RH
1404 {
1405 if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0)
1406 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
1407 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_REL)
1408 || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
1409 return false;
1410 }
1411
1412 if (relocs)
1413 {
1414 if (! bfd_elf32_add_dynamic_entry (info, DT_REL, 0)
1415 || ! bfd_elf32_add_dynamic_entry (info, DT_RELSZ, 0)
1416 || ! bfd_elf32_add_dynamic_entry (info, DT_RELENT,
1417 sizeof (Elf32_External_Rel)))
1418 return false;
1419 }
1420
1421 if (reltext)
1422 {
1423 if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
1424 return false;
d6cf2879 1425 info->flags |= DF_TEXTREL;
252b5132
RH
1426 }
1427 }
1428
1429 return true;
1430}
1431
252b5132
RH
1432/* Relocate an i386 ELF section. */
1433
1434static boolean
1435elf_i386_relocate_section (output_bfd, info, input_bfd, input_section,
1436 contents, relocs, local_syms, local_sections)
1437 bfd *output_bfd;
1438 struct bfd_link_info *info;
1439 bfd *input_bfd;
1440 asection *input_section;
1441 bfd_byte *contents;
1442 Elf_Internal_Rela *relocs;
1443 Elf_Internal_Sym *local_syms;
1444 asection **local_sections;
1445{
6725bdbf 1446 struct elf_i386_link_hash_table *htab;
252b5132
RH
1447 bfd *dynobj;
1448 Elf_Internal_Shdr *symtab_hdr;
1449 struct elf_link_hash_entry **sym_hashes;
1450 bfd_vma *local_got_offsets;
252b5132
RH
1451 asection *sreloc;
1452 Elf_Internal_Rela *rel;
1453 Elf_Internal_Rela *relend;
1454
6725bdbf
AM
1455 htab = elf_i386_hash_table (info);
1456 dynobj = htab->root.dynobj;
252b5132
RH
1457 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
1458 sym_hashes = elf_sym_hashes (input_bfd);
1459 local_got_offsets = elf_local_got_offsets (input_bfd);
1460
252b5132 1461 sreloc = NULL;
252b5132
RH
1462 rel = relocs;
1463 relend = relocs + input_section->reloc_count;
1464 for (; rel < relend; rel++)
1465 {
1466 int r_type;
1467 reloc_howto_type *howto;
1468 unsigned long r_symndx;
1469 struct elf_link_hash_entry *h;
1470 Elf_Internal_Sym *sym;
1471 asection *sec;
ffb2e45b 1472 bfd_vma off;
252b5132 1473 bfd_vma relocation;
83be169b 1474 boolean unresolved_reloc;
252b5132 1475 bfd_reloc_status_type r;
1b452ec6 1476 unsigned int indx;
252b5132
RH
1477
1478 r_type = ELF32_R_TYPE (rel->r_info);
dc47f327
AM
1479 if (r_type == (int) R_386_GNU_VTINHERIT
1480 || r_type == (int) R_386_GNU_VTENTRY)
252b5132 1481 continue;
dc47f327 1482
1b452ec6 1483 if ((indx = (unsigned) r_type) >= R_386_standard
dc47f327
AM
1484 && ((indx = (unsigned) r_type - R_386_ext_offset) - R_386_standard
1485 >= R_386_ext - R_386_standard))
252b5132
RH
1486 {
1487 bfd_set_error (bfd_error_bad_value);
1488 return false;
1489 }
1b452ec6 1490 howto = elf_howto_table + indx;
252b5132
RH
1491
1492 r_symndx = ELF32_R_SYM (rel->r_info);
1493
1494 if (info->relocateable)
1495 {
1496 /* This is a relocateable link. We don't have to change
1497 anything, unless the reloc is against a section symbol,
1498 in which case we have to adjust according to where the
1499 section symbol winds up in the output section. */
1500 if (r_symndx < symtab_hdr->sh_info)
1501 {
1502 sym = local_syms + r_symndx;
1503 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
1504 {
1505 bfd_vma val;
1506
1507 sec = local_sections[r_symndx];
1508 val = bfd_get_32 (input_bfd, contents + rel->r_offset);
1509 val += sec->output_offset + sym->st_value;
1510 bfd_put_32 (input_bfd, val, contents + rel->r_offset);
1511 }
1512 }
1513
1514 continue;
1515 }
1516
1517 /* This is a final link. */
1518 h = NULL;
1519 sym = NULL;
1520 sec = NULL;
83be169b 1521 unresolved_reloc = false;
252b5132
RH
1522 if (r_symndx < symtab_hdr->sh_info)
1523 {
1524 sym = local_syms + r_symndx;
1525 sec = local_sections[r_symndx];
1526 relocation = (sec->output_section->vma
1527 + sec->output_offset
1528 + sym->st_value);
1529 }
1530 else
1531 {
1532 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1533 while (h->root.type == bfd_link_hash_indirect
1534 || h->root.type == bfd_link_hash_warning)
1535 h = (struct elf_link_hash_entry *) h->root.u.i.link;
ffb2e45b 1536
6725bdbf 1537 relocation = 0;
252b5132
RH
1538 if (h->root.type == bfd_link_hash_defined
1539 || h->root.type == bfd_link_hash_defweak)
1540 {
1541 sec = h->root.u.def.section;
83be169b
AM
1542 if (sec->output_section == NULL)
1543 /* Set a flag that will be cleared later if we find a
1544 relocation value for this symbol. output_section
1545 is typically NULL for symbols satisfied by a shared
1546 library. */
1547 unresolved_reloc = true;
252b5132
RH
1548 else
1549 relocation = (h->root.u.def.value
1550 + sec->output_section->vma
1551 + sec->output_offset);
1552 }
1553 else if (h->root.type == bfd_link_hash_undefweak)
6725bdbf 1554 ;
3a27a730
L
1555 else if (info->shared && !info->symbolic
1556 && !info->no_undefined
1557 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
6725bdbf 1558 ;
252b5132
RH
1559 else
1560 {
1561 if (! ((*info->callbacks->undefined_symbol)
1562 (info, h->root.root.string, input_bfd,
5cc7c785 1563 input_section, rel->r_offset,
3a27a730
L
1564 (!info->shared || info->no_undefined
1565 || ELF_ST_VISIBILITY (h->other)))))
252b5132 1566 return false;
252b5132
RH
1567 }
1568 }
1569
1570 switch (r_type)
1571 {
1572 case R_386_GOT32:
1573 /* Relocation is to the entry for this symbol in the global
1574 offset table. */
ffb2e45b
AM
1575 if (htab->sgot == NULL)
1576 abort ();
252b5132
RH
1577
1578 if (h != NULL)
1579 {
6725bdbf 1580 boolean dyn;
252b5132
RH
1581
1582 off = h->got.offset;
6725bdbf
AM
1583 dyn = htab->root.dynamic_sections_created;
1584 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)
252b5132 1585 || (info->shared
6725bdbf
AM
1586 && (info->symbolic
1587 || h->dynindx == -1
1588 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
252b5132
RH
1589 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
1590 {
1591 /* This is actually a static link, or it is a
1592 -Bsymbolic link and the symbol is defined
1593 locally, or the symbol was forced to be local
1594 because of a version file. We must initialize
1595 this entry in the global offset table. Since the
1596 offset must always be a multiple of 4, we use the
1597 least significant bit to record whether we have
1598 initialized it already.
1599
1600 When doing a dynamic link, we create a .rel.got
1601 relocation entry to initialize the value. This
1602 is done in the finish_dynamic_symbol routine. */
1603 if ((off & 1) != 0)
1604 off &= ~1;
1605 else
1606 {
1607 bfd_put_32 (output_bfd, relocation,
6725bdbf 1608 htab->sgot->contents + off);
252b5132
RH
1609 h->got.offset |= 1;
1610 }
1611 }
8c694914
AM
1612 else
1613 unresolved_reloc = false;
252b5132
RH
1614 }
1615 else
1616 {
ffb2e45b
AM
1617 if (local_got_offsets == NULL)
1618 abort ();
252b5132
RH
1619
1620 off = local_got_offsets[r_symndx];
1621
1622 /* The offset must always be a multiple of 4. We use
83be169b
AM
1623 the least significant bit to record whether we have
1624 already generated the necessary reloc. */
252b5132
RH
1625 if ((off & 1) != 0)
1626 off &= ~1;
1627 else
1628 {
6725bdbf
AM
1629 bfd_put_32 (output_bfd, relocation,
1630 htab->sgot->contents + off);
252b5132
RH
1631
1632 if (info->shared)
1633 {
1634 asection *srelgot;
1635 Elf_Internal_Rel outrel;
1636
6725bdbf 1637 srelgot = htab->srelgot;
ffb2e45b
AM
1638 if (srelgot == NULL)
1639 abort ();
252b5132 1640
6725bdbf
AM
1641 outrel.r_offset = (htab->sgot->output_section->vma
1642 + htab->sgot->output_offset
252b5132
RH
1643 + off);
1644 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
1645 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1646 (((Elf32_External_Rel *)
1647 srelgot->contents)
1648 + srelgot->reloc_count));
1649 ++srelgot->reloc_count;
1650 }
1651
1652 local_got_offsets[r_symndx] |= 1;
1653 }
252b5132
RH
1654 }
1655
ffb2e45b
AM
1656 if (off >= (bfd_vma) -2)
1657 abort ();
1658
1659 relocation = htab->sgot->output_offset + off;
252b5132
RH
1660 break;
1661
1662 case R_386_GOTOFF:
1663 /* Relocation is relative to the start of the global offset
1664 table. */
1665
252b5132
RH
1666 /* Note that sgot->output_offset is not involved in this
1667 calculation. We always want the start of .got. If we
1668 defined _GLOBAL_OFFSET_TABLE in a different way, as is
1669 permitted by the ABI, we might have to change this
1670 calculation. */
6725bdbf 1671 relocation -= htab->sgot->output_section->vma;
252b5132
RH
1672 break;
1673
1674 case R_386_GOTPC:
1675 /* Use global offset table as symbol value. */
6725bdbf 1676 relocation = htab->sgot->output_section->vma;
83be169b 1677 unresolved_reloc = false;
252b5132
RH
1678 break;
1679
1680 case R_386_PLT32:
1681 /* Relocation is to the entry for this symbol in the
1682 procedure linkage table. */
1683
dd5724d5 1684 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 1685 without using the procedure linkage table. */
252b5132
RH
1686 if (h == NULL)
1687 break;
1688
dd5724d5 1689 if (h->plt.offset == (bfd_vma) -1
6725bdbf 1690 || htab->splt == NULL)
252b5132
RH
1691 {
1692 /* We didn't make a PLT entry for this symbol. This
83be169b
AM
1693 happens when statically linking PIC code, or when
1694 using -Bsymbolic. */
252b5132
RH
1695 break;
1696 }
1697
6725bdbf
AM
1698 relocation = (htab->splt->output_section->vma
1699 + htab->splt->output_offset
252b5132 1700 + h->plt.offset);
83be169b 1701 unresolved_reloc = false;
252b5132
RH
1702 break;
1703
1704 case R_386_32:
1705 case R_386_PC32:
12d0ee4a
AM
1706 if ((info->shared
1707 && (input_section->flags & SEC_ALLOC) != 0
1708 && (r_type != R_386_PC32
1709 || (h != NULL
1710 && h->dynindx != -1
1711 && (! info->symbolic
1712 || (h->elf_link_hash_flags
1713 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1714 || (!info->shared
1715 && (input_section->flags & SEC_ALLOC) != 0
1716 && h != NULL
1717 && h->dynindx != -1
1718 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
28d0b90e
AM
1719 && ((h->elf_link_hash_flags
1720 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1721 || h->root.type == bfd_link_hash_undefweak
1722 || h->root.type == bfd_link_hash_undefined)))
252b5132
RH
1723 {
1724 Elf_Internal_Rel outrel;
1725 boolean skip, relocate;
1726
1727 /* When generating a shared object, these relocations
1728 are copied into the output file to be resolved at run
1729 time. */
1730
1731 if (sreloc == NULL)
1732 {
1733 const char *name;
1734
1735 name = (bfd_elf_string_from_elf_section
1736 (input_bfd,
1737 elf_elfheader (input_bfd)->e_shstrndx,
1738 elf_section_data (input_section)->rel_hdr.sh_name));
1739 if (name == NULL)
1740 return false;
1741
c8492176
L
1742 if (strncmp (name, ".rel", 4) != 0
1743 || strcmp (bfd_get_section_name (input_bfd,
1744 input_section),
1745 name + 4) != 0)
1746 {
1747 if (input_bfd->my_archive)
ffb2e45b
AM
1748 (*_bfd_error_handler)\
1749 (_("%s(%s): bad relocation section name `%s\'"),
1750 bfd_get_filename (input_bfd->my_archive),
1751 bfd_get_filename (input_bfd),
1752 name);
c8492176 1753 else
ffb2e45b
AM
1754 (*_bfd_error_handler)
1755 (_("%s: bad relocation section name `%s\'"),
1756 bfd_get_filename (input_bfd),
1757 name);
c8492176
L
1758 return false;
1759 }
252b5132
RH
1760
1761 sreloc = bfd_get_section_by_name (dynobj, name);
ffb2e45b
AM
1762 if (sreloc == NULL)
1763 abort ();
252b5132
RH
1764 }
1765
1766 skip = false;
1767
1768 if (elf_section_data (input_section)->stab_info == NULL)
1769 outrel.r_offset = rel->r_offset;
1770 else
1771 {
1772 bfd_vma off;
1773
1774 off = (_bfd_stab_section_offset
12d0ee4a 1775 (output_bfd, htab->root.stab_info, input_section,
252b5132
RH
1776 &elf_section_data (input_section)->stab_info,
1777 rel->r_offset));
1778 if (off == (bfd_vma) -1)
1779 skip = true;
1780 outrel.r_offset = off;
1781 }
1782
1783 outrel.r_offset += (input_section->output_section->vma
1784 + input_section->output_offset);
1785
1786 if (skip)
1787 {
1788 memset (&outrel, 0, sizeof outrel);
1789 relocate = false;
1790 }
5a15f56f
AM
1791 else if (h != NULL
1792 && h->dynindx != -1
1793 && (r_type == R_386_PC32
1794 || !info->shared
1795 || !info->symbolic
1796 || (h->elf_link_hash_flags
1797 & ELF_LINK_HASH_DEF_REGULAR) == 0))
1798
252b5132 1799 {
252b5132 1800 relocate = false;
5a15f56f 1801 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH
1802 }
1803 else
1804 {
5a15f56f
AM
1805 /* This symbol is local, or marked to become local. */
1806 relocate = true;
1807 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH
1808 }
1809
1810 bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1811 (((Elf32_External_Rel *)
1812 sreloc->contents)
1813 + sreloc->reloc_count));
1814 ++sreloc->reloc_count;
1815
1816 /* If this reloc is against an external symbol, we do
1817 not want to fiddle with the addend. Otherwise, we
1818 need to include the symbol value so that it becomes
1819 an addend for the dynamic reloc. */
1820 if (! relocate)
1821 continue;
1822 }
1823
1824 break;
1825
1826 default:
1827 break;
1828 }
1829
8c694914
AM
1830 /* FIXME: Why do we allow debugging sections to escape this error?
1831 More importantly, why do we not emit dynamic relocs for
1832 R_386_32 above in debugging sections (which are ! SEC_ALLOC)?
1833 If we had emitted the dynamic reloc, we could remove the
1834 fudge here. */
1835 if (unresolved_reloc
1836 && !(info->shared
1837 && (input_section->flags & SEC_DEBUGGING) != 0
1838 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
83be169b
AM
1839 (*_bfd_error_handler)
1840 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
1841 bfd_get_filename (input_bfd),
1842 bfd_get_section_name (input_bfd, input_section),
1843 (long) rel->r_offset,
1844 h->root.root.string);
1845
252b5132
RH
1846 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
1847 contents, rel->r_offset,
1848 relocation, (bfd_vma) 0);
1849
ffb2e45b 1850 switch (r)
252b5132 1851 {
ffb2e45b
AM
1852 case bfd_reloc_ok:
1853 break;
1854
1855 case bfd_reloc_overflow:
1856 {
1857 const char *name;
1858
1859 if (h != NULL)
1860 name = h->root.root.string;
1861 else
252b5132 1862 {
ffb2e45b
AM
1863 name = bfd_elf_string_from_elf_section (input_bfd,
1864 symtab_hdr->sh_link,
1865 sym->st_name);
1866 if (name == NULL)
252b5132 1867 return false;
ffb2e45b
AM
1868 if (*name == '\0')
1869 name = bfd_section_name (input_bfd, sec);
252b5132 1870 }
ffb2e45b
AM
1871 if (! ((*info->callbacks->reloc_overflow)
1872 (info, name, howto->name, (bfd_vma) 0,
1873 input_bfd, input_section, rel->r_offset)))
1874 return false;
1875 }
1876 break;
1877
1878 default:
1879 case bfd_reloc_outofrange:
1880 abort ();
1881 break;
252b5132
RH
1882 }
1883 }
1884
1885 return true;
1886}
1887
1888/* Finish up dynamic symbol handling. We set the contents of various
1889 dynamic sections here. */
1890
1891static boolean
1892elf_i386_finish_dynamic_symbol (output_bfd, info, h, sym)
1893 bfd *output_bfd;
1894 struct bfd_link_info *info;
1895 struct elf_link_hash_entry *h;
1896 Elf_Internal_Sym *sym;
1897{
6725bdbf 1898 struct elf_i386_link_hash_table *htab;
252b5132
RH
1899 bfd *dynobj;
1900
6725bdbf
AM
1901 htab = elf_i386_hash_table (info);
1902 dynobj = htab->root.dynobj;
252b5132
RH
1903
1904 if (h->plt.offset != (bfd_vma) -1)
1905 {
252b5132
RH
1906 bfd_vma plt_index;
1907 bfd_vma got_offset;
1908 Elf_Internal_Rel rel;
1909
1910 /* This symbol has an entry in the procedure linkage table. Set
1911 it up. */
1912
ffb2e45b
AM
1913 if (h->dynindx == -1
1914 || htab->splt == NULL
1915 || htab->sgotplt == NULL
1916 || htab->srelplt == NULL)
1917 abort ();
252b5132
RH
1918
1919 /* Get the index in the procedure linkage table which
1920 corresponds to this symbol. This is the index of this symbol
1921 in all the symbols for which we are making plt entries. The
1922 first entry in the procedure linkage table is reserved. */
1923 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
1924
1925 /* Get the offset into the .got table of the entry that
1926 corresponds to this function. Each .got entry is 4 bytes.
1927 The first three are reserved. */
1928 got_offset = (plt_index + 3) * 4;
1929
1930 /* Fill in the entry in the procedure linkage table. */
1931 if (! info->shared)
1932 {
6725bdbf 1933 memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
252b5132
RH
1934 PLT_ENTRY_SIZE);
1935 bfd_put_32 (output_bfd,
6725bdbf
AM
1936 (htab->sgotplt->output_section->vma
1937 + htab->sgotplt->output_offset
252b5132 1938 + got_offset),
6725bdbf 1939 htab->splt->contents + h->plt.offset + 2);
252b5132
RH
1940 }
1941 else
1942 {
6725bdbf 1943 memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
252b5132
RH
1944 PLT_ENTRY_SIZE);
1945 bfd_put_32 (output_bfd, got_offset,
6725bdbf 1946 htab->splt->contents + h->plt.offset + 2);
252b5132
RH
1947 }
1948
1949 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
6725bdbf 1950 htab->splt->contents + h->plt.offset + 7);
252b5132 1951 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
6725bdbf 1952 htab->splt->contents + h->plt.offset + 12);
252b5132
RH
1953
1954 /* Fill in the entry in the global offset table. */
1955 bfd_put_32 (output_bfd,
6725bdbf
AM
1956 (htab->splt->output_section->vma
1957 + htab->splt->output_offset
252b5132
RH
1958 + h->plt.offset
1959 + 6),
6725bdbf 1960 htab->sgotplt->contents + got_offset);
252b5132
RH
1961
1962 /* Fill in the entry in the .rel.plt section. */
6725bdbf
AM
1963 rel.r_offset = (htab->sgotplt->output_section->vma
1964 + htab->sgotplt->output_offset
252b5132
RH
1965 + got_offset);
1966 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
1967 bfd_elf32_swap_reloc_out (output_bfd, &rel,
6725bdbf 1968 ((Elf32_External_Rel *) htab->srelplt->contents
252b5132
RH
1969 + plt_index));
1970
1971 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1972 {
1973 /* Mark the symbol as undefined, rather than as defined in
1974 the .plt section. Leave the value alone. */
1975 sym->st_shndx = SHN_UNDEF;
1976 }
1977 }
1978
1979 if (h->got.offset != (bfd_vma) -1)
1980 {
252b5132
RH
1981 Elf_Internal_Rel rel;
1982
1983 /* This symbol has an entry in the global offset table. Set it
1984 up. */
1985
ffb2e45b
AM
1986 if (htab->sgot == NULL || htab->srelgot == NULL)
1987 abort ();
252b5132 1988
6725bdbf
AM
1989 rel.r_offset = (htab->sgot->output_section->vma
1990 + htab->sgot->output_offset
252b5132
RH
1991 + (h->got.offset &~ 1));
1992
dd5724d5
AM
1993 /* If this is a static link, or it is a -Bsymbolic link and the
1994 symbol is defined locally or was forced to be local because
1995 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH
1996 The entry in the global offset table will already have been
1997 initialized in the relocate_section function. */
6725bdbf
AM
1998 if (info->shared
1999 && (info->symbolic
2000 || h->dynindx == -1
2001 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2002 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
dd5724d5 2003 {
6725bdbf 2004 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM
2005 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2006 }
252b5132
RH
2007 else
2008 {
dd5724d5 2009 BFD_ASSERT((h->got.offset & 1) == 0);
6725bdbf
AM
2010 bfd_put_32 (output_bfd, (bfd_vma) 0,
2011 htab->sgot->contents + h->got.offset);
252b5132
RH
2012 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
2013 }
2014
2015 bfd_elf32_swap_reloc_out (output_bfd, &rel,
6725bdbf
AM
2016 ((Elf32_External_Rel *) htab->srelgot->contents
2017 + htab->srelgot->reloc_count));
2018 ++htab->srelgot->reloc_count;
252b5132
RH
2019 }
2020
791987af 2021 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
252b5132 2022 {
252b5132
RH
2023 Elf_Internal_Rel rel;
2024
2025 /* This symbol needs a copy reloc. Set it up. */
2026
ffb2e45b
AM
2027 if (h->dynindx == -1
2028 || (h->root.type != bfd_link_hash_defined
2029 && h->root.type != bfd_link_hash_defweak)
2030 || htab->srelbss == NULL)
2031 abort ();
252b5132
RH
2032
2033 rel.r_offset = (h->root.u.def.value
2034 + h->root.u.def.section->output_section->vma
2035 + h->root.u.def.section->output_offset);
2036 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
2037 bfd_elf32_swap_reloc_out (output_bfd, &rel,
6725bdbf
AM
2038 ((Elf32_External_Rel *) htab->srelbss->contents
2039 + htab->srelbss->reloc_count));
2040 ++htab->srelbss->reloc_count;
252b5132
RH
2041 }
2042
2043 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
2044 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
2045 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2046 sym->st_shndx = SHN_ABS;
2047
2048 return true;
2049}
2050
2051/* Finish up the dynamic sections. */
2052
2053static boolean
2054elf_i386_finish_dynamic_sections (output_bfd, info)
2055 bfd *output_bfd;
2056 struct bfd_link_info *info;
2057{
6725bdbf 2058 struct elf_i386_link_hash_table *htab;
252b5132 2059 bfd *dynobj;
252b5132
RH
2060 asection *sdyn;
2061
6725bdbf
AM
2062 htab = elf_i386_hash_table (info);
2063 dynobj = htab->root.dynobj;
252b5132
RH
2064 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
2065
6725bdbf 2066 if (htab->root.dynamic_sections_created)
252b5132 2067 {
252b5132
RH
2068 Elf32_External_Dyn *dyncon, *dynconend;
2069
ffb2e45b
AM
2070 if (sdyn == NULL || htab->sgot == NULL)
2071 abort ();
252b5132
RH
2072
2073 dyncon = (Elf32_External_Dyn *) sdyn->contents;
2074 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
2075 for (; dyncon < dynconend; dyncon++)
2076 {
2077 Elf_Internal_Dyn dyn;
252b5132
RH
2078
2079 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2080
2081 switch (dyn.d_tag)
2082 {
2083 default:
2084 break;
2085
2086 case DT_PLTGOT:
6725bdbf
AM
2087 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
2088 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2089 break;
2090
252b5132 2091 case DT_JMPREL:
6725bdbf 2092 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
252b5132
RH
2093 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2094 break;
2095
2096 case DT_PLTRELSZ:
6725bdbf
AM
2097 if (htab->srelplt->output_section->_cooked_size != 0)
2098 dyn.d_un.d_val = htab->srelplt->output_section->_cooked_size;
252b5132 2099 else
6725bdbf 2100 dyn.d_un.d_val = htab->srelplt->output_section->_raw_size;
252b5132
RH
2101 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2102 break;
2103
2104 case DT_RELSZ:
2105 /* My reading of the SVR4 ABI indicates that the
2106 procedure linkage table relocs (DT_JMPREL) should be
2107 included in the overall relocs (DT_REL). This is
2108 what Solaris does. However, UnixWare can not handle
2109 that case. Therefore, we override the DT_RELSZ entry
2110 here to make it not include the JMPREL relocs. Since
2111 the linker script arranges for .rel.plt to follow all
2112 other relocation sections, we don't have to worry
2113 about changing the DT_REL entry. */
6725bdbf 2114 if (htab->srelplt != NULL)
252b5132 2115 {
6725bdbf
AM
2116 if (htab->srelplt->output_section->_cooked_size != 0)
2117 dyn.d_un.d_val -= htab->srelplt->output_section->_cooked_size;
252b5132 2118 else
6725bdbf 2119 dyn.d_un.d_val -= htab->srelplt->output_section->_raw_size;
252b5132
RH
2120 }
2121 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2122 break;
2123 }
2124 }
2125
2126 /* Fill in the first entry in the procedure linkage table. */
6725bdbf 2127 if (htab->splt && htab->splt->_raw_size > 0)
252b5132
RH
2128 {
2129 if (info->shared)
6725bdbf
AM
2130 memcpy (htab->splt->contents,
2131 elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE);
252b5132
RH
2132 else
2133 {
6725bdbf
AM
2134 memcpy (htab->splt->contents,
2135 elf_i386_plt0_entry, PLT_ENTRY_SIZE);
252b5132 2136 bfd_put_32 (output_bfd,
6725bdbf
AM
2137 (htab->sgotplt->output_section->vma
2138 + htab->sgotplt->output_offset
2139 + 4),
2140 htab->splt->contents + 2);
252b5132 2141 bfd_put_32 (output_bfd,
6725bdbf
AM
2142 (htab->sgotplt->output_section->vma
2143 + htab->sgotplt->output_offset
2144 + 8),
2145 htab->splt->contents + 8);
252b5132
RH
2146 }
2147
2148 /* UnixWare sets the entsize of .plt to 4, although that doesn't
2149 really seem like the right value. */
6725bdbf
AM
2150 elf_section_data (htab->splt->output_section)
2151 ->this_hdr.sh_entsize = 4;
252b5132
RH
2152 }
2153 }
2154
12d0ee4a 2155 if (htab->sgotplt)
252b5132 2156 {
12d0ee4a
AM
2157 /* Fill in the first three entries in the global offset table. */
2158 if (htab->sgotplt->_raw_size > 0)
2159 {
2160 bfd_put_32 (output_bfd,
2161 (sdyn == NULL ? (bfd_vma) 0
2162 : sdyn->output_section->vma + sdyn->output_offset),
2163 htab->sgotplt->contents);
2164 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
2165 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
2166 }
252b5132 2167
12d0ee4a
AM
2168 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
2169 }
252b5132
RH
2170 return true;
2171}
2172
dd484e5c
L
2173/* Set the correct type for an x86 ELF section. We do this by the
2174 section name, which is a hack, but ought to work. */
2175
2176static boolean
2177elf_i386_fake_sections (abfd, hdr, sec)
2178 bfd *abfd ATTRIBUTE_UNUSED;
2179 Elf32_Internal_Shdr *hdr;
2180 asection *sec;
2181{
2182 register const char *name;
2183
2184 name = bfd_get_section_name (abfd, sec);
2185
2186 if (strcmp (name, ".reloc") == 0)
2187 /*
2188 * This is an ugly, but unfortunately necessary hack that is
2189 * needed when producing EFI binaries on x86. It tells
2190 * elf.c:elf_fake_sections() not to consider ".reloc" as a section
2191 * containing ELF relocation info. We need this hack in order to
2192 * be able to generate ELF binaries that can be translated into
2193 * EFI applications (which are essentially COFF objects). Those
2194 * files contain a COFF ".reloc" section inside an ELFNN object,
2195 * which would normally cause BFD to segfault because it would
2196 * attempt to interpret this section as containing relocation
2197 * entries for section "oc". With this hack enabled, ".reloc"
2198 * will be treated as a normal data section, which will avoid the
2199 * segfault. However, you won't be able to create an ELFNN binary
2200 * with a section named "oc" that needs relocations, but that's
2201 * the kind of ugly side-effects you get when detecting section
2202 * types based on their names... In practice, this limitation is
2203 * unlikely to bite.
2204 */
2205 hdr->sh_type = SHT_PROGBITS;
2206
2207 return true;
2208}
2209
2210
252b5132
RH
2211#define TARGET_LITTLE_SYM bfd_elf32_i386_vec
2212#define TARGET_LITTLE_NAME "elf32-i386"
2213#define ELF_ARCH bfd_arch_i386
2214#define ELF_MACHINE_CODE EM_386
2215#define ELF_MAXPAGESIZE 0x1000
252b5132
RH
2216
2217#define elf_backend_can_gc_sections 1
2218#define elf_backend_want_got_plt 1
2219#define elf_backend_plt_readonly 1
2220#define elf_backend_want_plt_sym 0
2221#define elf_backend_got_header_size 12
2222#define elf_backend_plt_header_size PLT_ENTRY_SIZE
2223
dd5724d5
AM
2224#define elf_info_to_howto elf_i386_info_to_howto
2225#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
2226
dd5724d5
AM
2227#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
2228#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
2229#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
2230
2231#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
2232#define elf_backend_check_relocs elf_i386_check_relocs
6725bdbf 2233#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
dd5724d5
AM
2234#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
2235#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
2236#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
2237#define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
2238#define elf_backend_relocate_section elf_i386_relocate_section
2239#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
83be169b 2240#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5 2241
252b5132 2242#include "elf32-target.h"
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