1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004 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. */
27 /* 386 uses REL relocations instead of RELA. */
32 static reloc_howto_type elf_howto_table[]=
34 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
35 bfd_elf_generic_reloc, "R_386_NONE",
36 TRUE, 0x00000000, 0x00000000, FALSE),
37 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
38 bfd_elf_generic_reloc, "R_386_32",
39 TRUE, 0xffffffff, 0xffffffff, FALSE),
40 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
41 bfd_elf_generic_reloc, "R_386_PC32",
42 TRUE, 0xffffffff, 0xffffffff, TRUE),
43 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
44 bfd_elf_generic_reloc, "R_386_GOT32",
45 TRUE, 0xffffffff, 0xffffffff, FALSE),
46 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
47 bfd_elf_generic_reloc, "R_386_PLT32",
48 TRUE, 0xffffffff, 0xffffffff, TRUE),
49 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
50 bfd_elf_generic_reloc, "R_386_COPY",
51 TRUE, 0xffffffff, 0xffffffff, FALSE),
52 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
53 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
54 TRUE, 0xffffffff, 0xffffffff, FALSE),
55 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
57 TRUE, 0xffffffff, 0xffffffff, FALSE),
58 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_386_RELATIVE",
60 TRUE, 0xffffffff, 0xffffffff, FALSE),
61 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_386_GOTOFF",
63 TRUE, 0xffffffff, 0xffffffff, FALSE),
64 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_386_GOTPC",
66 TRUE, 0xffffffff, 0xffffffff, TRUE),
68 /* We have a gap in the reloc numbers here.
69 R_386_standard counts the number up to this point, and
70 R_386_ext_offset is the value to subtract from a reloc type of
71 R_386_16 thru R_386_PC8 to form an index into this table. */
72 #define R_386_standard (R_386_GOTPC + 1)
73 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
75 /* These relocs are a GNU extension. */
76 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
78 TRUE, 0xffffffff, 0xffffffff, FALSE),
79 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_386_TLS_IE",
81 TRUE, 0xffffffff, 0xffffffff, FALSE),
82 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
84 TRUE, 0xffffffff, 0xffffffff, FALSE),
85 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_386_TLS_LE",
87 TRUE, 0xffffffff, 0xffffffff, FALSE),
88 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_386_TLS_GD",
90 TRUE, 0xffffffff, 0xffffffff, FALSE),
91 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_386_TLS_LDM",
93 TRUE, 0xffffffff, 0xffffffff, FALSE),
94 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_386_16",
96 TRUE, 0xffff, 0xffff, FALSE),
97 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_386_PC16",
99 TRUE, 0xffff, 0xffff, TRUE),
100 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_386_8",
102 TRUE, 0xff, 0xff, FALSE),
103 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
104 bfd_elf_generic_reloc, "R_386_PC8",
105 TRUE, 0xff, 0xff, TRUE),
107 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
108 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
109 /* These are common with Solaris TLS implementation. */
110 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
112 TRUE, 0xffffffff, 0xffffffff, FALSE),
113 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
115 TRUE, 0xffffffff, 0xffffffff, FALSE),
116 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
118 TRUE, 0xffffffff, 0xffffffff, FALSE),
119 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
121 TRUE, 0xffffffff, 0xffffffff, FALSE),
122 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
124 TRUE, 0xffffffff, 0xffffffff, FALSE),
125 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
127 TRUE, 0xffffffff, 0xffffffff, FALSE),
130 #define R_386_tls (R_386_TLS_TPOFF32 + 1 - R_386_tls_offset)
131 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
133 /* GNU extension to record C++ vtable hierarchy. */
134 HOWTO (R_386_GNU_VTINHERIT, /* type */
136 2, /* size (0 = byte, 1 = short, 2 = long) */
138 FALSE, /* pc_relative */
140 complain_overflow_dont, /* complain_on_overflow */
141 NULL, /* special_function */
142 "R_386_GNU_VTINHERIT", /* name */
143 FALSE, /* partial_inplace */
146 FALSE), /* pcrel_offset */
148 /* GNU extension to record C++ vtable member usage. */
149 HOWTO (R_386_GNU_VTENTRY, /* type */
151 2, /* size (0 = byte, 1 = short, 2 = long) */
153 FALSE, /* pc_relative */
155 complain_overflow_dont, /* complain_on_overflow */
156 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
157 "R_386_GNU_VTENTRY", /* name */
158 FALSE, /* partial_inplace */
161 FALSE) /* pcrel_offset */
163 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
167 #ifdef DEBUG_GEN_RELOC
169 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
174 static reloc_howto_type *
175 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
176 bfd_reloc_code_real_type code)
181 TRACE ("BFD_RELOC_NONE");
182 return &elf_howto_table[R_386_NONE];
185 TRACE ("BFD_RELOC_32");
186 return &elf_howto_table[R_386_32];
189 TRACE ("BFD_RELOC_CTOR");
190 return &elf_howto_table[R_386_32];
192 case BFD_RELOC_32_PCREL:
193 TRACE ("BFD_RELOC_PC32");
194 return &elf_howto_table[R_386_PC32];
196 case BFD_RELOC_386_GOT32:
197 TRACE ("BFD_RELOC_386_GOT32");
198 return &elf_howto_table[R_386_GOT32];
200 case BFD_RELOC_386_PLT32:
201 TRACE ("BFD_RELOC_386_PLT32");
202 return &elf_howto_table[R_386_PLT32];
204 case BFD_RELOC_386_COPY:
205 TRACE ("BFD_RELOC_386_COPY");
206 return &elf_howto_table[R_386_COPY];
208 case BFD_RELOC_386_GLOB_DAT:
209 TRACE ("BFD_RELOC_386_GLOB_DAT");
210 return &elf_howto_table[R_386_GLOB_DAT];
212 case BFD_RELOC_386_JUMP_SLOT:
213 TRACE ("BFD_RELOC_386_JUMP_SLOT");
214 return &elf_howto_table[R_386_JUMP_SLOT];
216 case BFD_RELOC_386_RELATIVE:
217 TRACE ("BFD_RELOC_386_RELATIVE");
218 return &elf_howto_table[R_386_RELATIVE];
220 case BFD_RELOC_386_GOTOFF:
221 TRACE ("BFD_RELOC_386_GOTOFF");
222 return &elf_howto_table[R_386_GOTOFF];
224 case BFD_RELOC_386_GOTPC:
225 TRACE ("BFD_RELOC_386_GOTPC");
226 return &elf_howto_table[R_386_GOTPC];
228 /* These relocs are a GNU extension. */
229 case BFD_RELOC_386_TLS_TPOFF:
230 TRACE ("BFD_RELOC_386_TLS_TPOFF");
231 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
233 case BFD_RELOC_386_TLS_IE:
234 TRACE ("BFD_RELOC_386_TLS_IE");
235 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
237 case BFD_RELOC_386_TLS_GOTIE:
238 TRACE ("BFD_RELOC_386_TLS_GOTIE");
239 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
241 case BFD_RELOC_386_TLS_LE:
242 TRACE ("BFD_RELOC_386_TLS_LE");
243 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
245 case BFD_RELOC_386_TLS_GD:
246 TRACE ("BFD_RELOC_386_TLS_GD");
247 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
249 case BFD_RELOC_386_TLS_LDM:
250 TRACE ("BFD_RELOC_386_TLS_LDM");
251 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
254 TRACE ("BFD_RELOC_16");
255 return &elf_howto_table[R_386_16 - R_386_ext_offset];
257 case BFD_RELOC_16_PCREL:
258 TRACE ("BFD_RELOC_16_PCREL");
259 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
262 TRACE ("BFD_RELOC_8");
263 return &elf_howto_table[R_386_8 - R_386_ext_offset];
265 case BFD_RELOC_8_PCREL:
266 TRACE ("BFD_RELOC_8_PCREL");
267 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
269 /* Common with Sun TLS implementation. */
270 case BFD_RELOC_386_TLS_LDO_32:
271 TRACE ("BFD_RELOC_386_TLS_LDO_32");
272 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
274 case BFD_RELOC_386_TLS_IE_32:
275 TRACE ("BFD_RELOC_386_TLS_IE_32");
276 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
278 case BFD_RELOC_386_TLS_LE_32:
279 TRACE ("BFD_RELOC_386_TLS_LE_32");
280 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
282 case BFD_RELOC_386_TLS_DTPMOD32:
283 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
284 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
286 case BFD_RELOC_386_TLS_DTPOFF32:
287 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
288 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
290 case BFD_RELOC_386_TLS_TPOFF32:
291 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
292 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
294 case BFD_RELOC_VTABLE_INHERIT:
295 TRACE ("BFD_RELOC_VTABLE_INHERIT");
296 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
298 case BFD_RELOC_VTABLE_ENTRY:
299 TRACE ("BFD_RELOC_VTABLE_ENTRY");
300 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
311 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
313 Elf_Internal_Rela *dst)
315 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
318 if ((indx = r_type) >= R_386_standard
319 && ((indx = r_type - R_386_ext_offset) - R_386_standard
320 >= R_386_ext - R_386_standard)
321 && ((indx = r_type - R_386_tls_offset) - R_386_ext
322 >= R_386_tls - R_386_ext)
323 && ((indx = r_type - R_386_vt_offset) - R_386_tls
324 >= R_386_vt - R_386_tls))
326 (*_bfd_error_handler) (_("%s: invalid relocation type %d"),
327 bfd_archive_filename (abfd), (int) r_type);
330 cache_ptr->howto = &elf_howto_table[indx];
333 /* Return whether a symbol name implies a local label. The UnixWare
334 2.1 cc generates temporary symbols that start with .X, so we
335 recognize them here. FIXME: do other SVR4 compilers also use .X?.
336 If so, we should move the .X recognition into
337 _bfd_elf_is_local_label_name. */
340 elf_i386_is_local_label_name (bfd *abfd, const char *name)
342 if (name[0] == '.' && name[1] == 'X')
345 return _bfd_elf_is_local_label_name (abfd, name);
348 /* Support for core dump NOTE sections. */
351 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
356 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
358 int pr_version = bfd_get_32 (abfd, note->descdata);
364 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
367 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
371 raw_size = bfd_get_32 (abfd, note->descdata + 8);
375 switch (note->descsz)
380 case 144: /* Linux/i386 */
382 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
385 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
395 /* Make a ".reg/999" section. */
396 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
397 raw_size, note->descpos + offset);
401 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
403 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
405 int pr_version = bfd_get_32 (abfd, note->descdata);
410 elf_tdata (abfd)->core_program
411 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
412 elf_tdata (abfd)->core_command
413 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
417 switch (note->descsz)
422 case 124: /* Linux/i386 elf_prpsinfo. */
423 elf_tdata (abfd)->core_program
424 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
425 elf_tdata (abfd)->core_command
426 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
430 /* Note that for some reason, a spurious space is tacked
431 onto the end of the args in some (at least one anyway)
432 implementations, so strip it off if it exists. */
434 char *command = elf_tdata (abfd)->core_command;
435 int n = strlen (command);
437 if (0 < n && command[n - 1] == ' ')
438 command[n - 1] = '\0';
444 /* Functions for the i386 ELF linker.
446 In order to gain some understanding of code in this file without
447 knowing all the intricate details of the linker, note the
450 Functions named elf_i386_* are called by external routines, other
451 functions are only called locally. elf_i386_* functions appear
452 in this file more or less in the order in which they are called
453 from external routines. eg. elf_i386_check_relocs is called
454 early in the link process, elf_i386_finish_dynamic_sections is
455 one of the last functions. */
458 /* The name of the dynamic interpreter. This is put in the .interp
461 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
463 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
464 copying dynamic variables from a shared lib into an app's dynbss
465 section, and instead use a dynamic relocation to point into the
467 #define ELIMINATE_COPY_RELOCS 1
469 /* The size in bytes of an entry in the procedure linkage table. */
471 #define PLT_ENTRY_SIZE 16
473 /* The first entry in an absolute procedure linkage table looks like
474 this. See the SVR4 ABI i386 supplement to see how this works. */
476 static const bfd_byte elf_i386_plt0_entry[PLT_ENTRY_SIZE] =
478 0xff, 0x35, /* pushl contents of address */
479 0, 0, 0, 0, /* replaced with address of .got + 4. */
480 0xff, 0x25, /* jmp indirect */
481 0, 0, 0, 0, /* replaced with address of .got + 8. */
482 0, 0, 0, 0 /* pad out to 16 bytes. */
485 /* Subsequent entries in an absolute procedure linkage table look like
488 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
490 0xff, 0x25, /* jmp indirect */
491 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
492 0x68, /* pushl immediate */
493 0, 0, 0, 0, /* replaced with offset into relocation table. */
494 0xe9, /* jmp relative */
495 0, 0, 0, 0 /* replaced with offset to start of .plt. */
498 /* The first entry in a PIC procedure linkage table look like this. */
500 static const bfd_byte elf_i386_pic_plt0_entry[PLT_ENTRY_SIZE] =
502 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
503 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
504 0, 0, 0, 0 /* pad out to 16 bytes. */
507 /* Subsequent entries in a PIC procedure linkage table look like this. */
509 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
511 0xff, 0xa3, /* jmp *offset(%ebx) */
512 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
513 0x68, /* pushl immediate */
514 0, 0, 0, 0, /* replaced with offset into relocation table. */
515 0xe9, /* jmp relative */
516 0, 0, 0, 0 /* replaced with offset to start of .plt. */
519 /* The i386 linker needs to keep track of the number of relocs that it
520 decides to copy as dynamic relocs in check_relocs for each symbol.
521 This is so that it can later discard them if they are found to be
522 unnecessary. We store the information in a field extending the
523 regular ELF linker hash table. */
525 struct elf_i386_dyn_relocs
527 struct elf_i386_dyn_relocs *next;
529 /* The input section of the reloc. */
532 /* Total number of relocs copied for the input section. */
535 /* Number of pc-relative relocs copied for the input section. */
536 bfd_size_type pc_count;
539 /* i386 ELF linker hash entry. */
541 struct elf_i386_link_hash_entry
543 struct elf_link_hash_entry elf;
545 /* Track dynamic relocs copied for this symbol. */
546 struct elf_i386_dyn_relocs *dyn_relocs;
548 #define GOT_UNKNOWN 0
552 #define GOT_TLS_IE_POS 5
553 #define GOT_TLS_IE_NEG 6
554 #define GOT_TLS_IE_BOTH 7
555 unsigned char tls_type;
558 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
560 struct elf_i386_obj_tdata
562 struct elf_obj_tdata root;
564 /* tls_type for each local got entry. */
565 char *local_got_tls_type;
568 #define elf_i386_tdata(abfd) \
569 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
571 #define elf_i386_local_got_tls_type(abfd) \
572 (elf_i386_tdata (abfd)->local_got_tls_type)
575 elf_i386_mkobject (bfd *abfd)
577 bfd_size_type amt = sizeof (struct elf_i386_obj_tdata);
578 abfd->tdata.any = bfd_zalloc (abfd, amt);
579 if (abfd->tdata.any == NULL)
584 /* i386 ELF linker hash table. */
586 struct elf_i386_link_hash_table
588 struct elf_link_hash_table elf;
590 /* Short-cuts to get to dynamic linker sections. */
600 bfd_signed_vma refcount;
604 /* Small local sym to section mapping cache. */
605 struct sym_sec_cache sym_sec;
608 /* Get the i386 ELF linker hash table from a link_info structure. */
610 #define elf_i386_hash_table(p) \
611 ((struct elf_i386_link_hash_table *) ((p)->hash))
613 /* Create an entry in an i386 ELF linker hash table. */
615 static struct bfd_hash_entry *
616 link_hash_newfunc (struct bfd_hash_entry *entry,
617 struct bfd_hash_table *table,
620 /* Allocate the structure if it has not already been allocated by a
624 entry = bfd_hash_allocate (table,
625 sizeof (struct elf_i386_link_hash_entry));
630 /* Call the allocation method of the superclass. */
631 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
634 struct elf_i386_link_hash_entry *eh;
636 eh = (struct elf_i386_link_hash_entry *) entry;
637 eh->dyn_relocs = NULL;
638 eh->tls_type = GOT_UNKNOWN;
644 /* Create an i386 ELF linker hash table. */
646 static struct bfd_link_hash_table *
647 elf_i386_link_hash_table_create (bfd *abfd)
649 struct elf_i386_link_hash_table *ret;
650 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
652 ret = bfd_malloc (amt);
656 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
669 ret->tls_ldm_got.refcount = 0;
670 ret->sym_sec.abfd = NULL;
672 return &ret->elf.root;
675 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
676 shortcuts to them in our hash table. */
679 create_got_section (bfd *dynobj, struct bfd_link_info *info)
681 struct elf_i386_link_hash_table *htab;
683 if (! _bfd_elf_create_got_section (dynobj, info))
686 htab = elf_i386_hash_table (info);
687 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
688 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
689 if (!htab->sgot || !htab->sgotplt)
692 htab->srelgot = bfd_make_section (dynobj, ".rel.got");
693 if (htab->srelgot == NULL
694 || ! bfd_set_section_flags (dynobj, htab->srelgot,
695 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
696 | SEC_IN_MEMORY | SEC_LINKER_CREATED
698 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
703 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
704 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
708 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
710 struct elf_i386_link_hash_table *htab;
712 htab = elf_i386_hash_table (info);
713 if (!htab->sgot && !create_got_section (dynobj, info))
716 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
719 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
720 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
721 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
723 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
725 if (!htab->splt || !htab->srelplt || !htab->sdynbss
726 || (!info->shared && !htab->srelbss))
732 /* Copy the extra info we tack onto an elf_link_hash_entry. */
735 elf_i386_copy_indirect_symbol (const struct elf_backend_data *bed,
736 struct elf_link_hash_entry *dir,
737 struct elf_link_hash_entry *ind)
739 struct elf_i386_link_hash_entry *edir, *eind;
741 edir = (struct elf_i386_link_hash_entry *) dir;
742 eind = (struct elf_i386_link_hash_entry *) ind;
744 if (eind->dyn_relocs != NULL)
746 if (edir->dyn_relocs != NULL)
748 struct elf_i386_dyn_relocs **pp;
749 struct elf_i386_dyn_relocs *p;
751 if (ind->root.type == bfd_link_hash_indirect)
754 /* Add reloc counts against the weak sym to the strong sym
755 list. Merge any entries against the same section. */
756 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
758 struct elf_i386_dyn_relocs *q;
760 for (q = edir->dyn_relocs; q != NULL; q = q->next)
761 if (q->sec == p->sec)
763 q->pc_count += p->pc_count;
764 q->count += p->count;
771 *pp = edir->dyn_relocs;
774 edir->dyn_relocs = eind->dyn_relocs;
775 eind->dyn_relocs = NULL;
778 if (ind->root.type == bfd_link_hash_indirect
779 && dir->got.refcount <= 0)
781 edir->tls_type = eind->tls_type;
782 eind->tls_type = GOT_UNKNOWN;
785 if (ELIMINATE_COPY_RELOCS
786 && ind->root.type != bfd_link_hash_indirect
787 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
788 /* If called to transfer flags for a weakdef during processing
789 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
790 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
791 dir->elf_link_hash_flags |=
792 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
793 | ELF_LINK_HASH_REF_REGULAR
794 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
795 | ELF_LINK_HASH_NEEDS_PLT
796 | ELF_LINK_POINTER_EQUALITY_NEEDED));
798 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
802 elf_i386_tls_transition (struct bfd_link_info *info, int r_type, int is_local)
810 case R_386_TLS_IE_32:
812 return R_386_TLS_LE_32;
813 return R_386_TLS_IE_32;
815 case R_386_TLS_GOTIE:
817 return R_386_TLS_LE_32;
820 return R_386_TLS_LE_32;
826 /* Look through the relocs for a section during the first phase, and
827 calculate needed space in the global offset table, procedure linkage
828 table, and dynamic reloc sections. */
831 elf_i386_check_relocs (bfd *abfd,
832 struct bfd_link_info *info,
834 const Elf_Internal_Rela *relocs)
836 struct elf_i386_link_hash_table *htab;
837 Elf_Internal_Shdr *symtab_hdr;
838 struct elf_link_hash_entry **sym_hashes;
839 const Elf_Internal_Rela *rel;
840 const Elf_Internal_Rela *rel_end;
843 if (info->relocatable)
846 htab = elf_i386_hash_table (info);
847 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
848 sym_hashes = elf_sym_hashes (abfd);
852 rel_end = relocs + sec->reloc_count;
853 for (rel = relocs; rel < rel_end; rel++)
856 unsigned long r_symndx;
857 struct elf_link_hash_entry *h;
859 r_symndx = ELF32_R_SYM (rel->r_info);
860 r_type = ELF32_R_TYPE (rel->r_info);
862 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
864 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
865 bfd_archive_filename (abfd),
870 if (r_symndx < symtab_hdr->sh_info)
873 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
875 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
880 htab->tls_ldm_got.refcount += 1;
884 /* This symbol requires a procedure linkage table entry. We
885 actually build the entry in adjust_dynamic_symbol,
886 because this might be a case of linking PIC code which is
887 never referenced by a dynamic object, in which case we
888 don't need to generate a procedure linkage table entry
891 /* If this is a local symbol, we resolve it directly without
892 creating a procedure linkage table entry. */
896 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
897 h->plt.refcount += 1;
900 case R_386_TLS_IE_32:
902 case R_386_TLS_GOTIE:
904 info->flags |= DF_STATIC_TLS;
909 /* This symbol requires a global offset table entry. */
911 int tls_type, old_tls_type;
916 case R_386_GOT32: tls_type = GOT_NORMAL; break;
917 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
918 case R_386_TLS_IE_32:
919 if (ELF32_R_TYPE (rel->r_info) == r_type)
920 tls_type = GOT_TLS_IE_NEG;
922 /* If this is a GD->IE transition, we may use either of
923 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
924 tls_type = GOT_TLS_IE;
927 case R_386_TLS_GOTIE:
928 tls_type = GOT_TLS_IE_POS; break;
933 h->got.refcount += 1;
934 old_tls_type = elf_i386_hash_entry(h)->tls_type;
938 bfd_signed_vma *local_got_refcounts;
940 /* This is a global offset table entry for a local symbol. */
941 local_got_refcounts = elf_local_got_refcounts (abfd);
942 if (local_got_refcounts == NULL)
946 size = symtab_hdr->sh_info;
947 size *= (sizeof (bfd_signed_vma) + sizeof(char));
948 local_got_refcounts = bfd_zalloc (abfd, size);
949 if (local_got_refcounts == NULL)
951 elf_local_got_refcounts (abfd) = local_got_refcounts;
952 elf_i386_local_got_tls_type (abfd)
953 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
955 local_got_refcounts[r_symndx] += 1;
956 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
959 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
960 tls_type |= old_tls_type;
961 /* If a TLS symbol is accessed using IE at least once,
962 there is no point to use dynamic model for it. */
963 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
964 && (old_tls_type != GOT_TLS_GD
965 || (tls_type & GOT_TLS_IE) == 0))
967 if ((old_tls_type & GOT_TLS_IE) && tls_type == GOT_TLS_GD)
968 tls_type = old_tls_type;
971 (*_bfd_error_handler)
972 (_("%s: `%s' accessed both as normal and "
973 "thread local symbol"),
974 bfd_archive_filename (abfd),
975 h ? h->root.root.string : "<local>");
980 if (old_tls_type != tls_type)
983 elf_i386_hash_entry (h)->tls_type = tls_type;
985 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
993 if (htab->sgot == NULL)
995 if (htab->elf.dynobj == NULL)
996 htab->elf.dynobj = abfd;
997 if (!create_got_section (htab->elf.dynobj, info))
1000 if (r_type != R_386_TLS_IE)
1004 case R_386_TLS_LE_32:
1008 info->flags |= DF_STATIC_TLS;
1013 if (h != NULL && !info->shared)
1015 /* If this reloc is in a read-only section, we might
1016 need a copy reloc. We can't check reliably at this
1017 stage whether the section is read-only, as input
1018 sections have not yet been mapped to output sections.
1019 Tentatively set the flag for now, and correct in
1020 adjust_dynamic_symbol. */
1021 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
1023 /* We may need a .plt entry if the function this reloc
1024 refers to is in a shared lib. */
1025 h->plt.refcount += 1;
1026 if (r_type != R_386_PC32)
1027 h->elf_link_hash_flags |= ELF_LINK_POINTER_EQUALITY_NEEDED;
1030 /* If we are creating a shared library, and this is a reloc
1031 against a global symbol, or a non PC relative reloc
1032 against a local symbol, then we need to copy the reloc
1033 into the shared library. However, if we are linking with
1034 -Bsymbolic, we do not need to copy a reloc against a
1035 global symbol which is defined in an object we are
1036 including in the link (i.e., DEF_REGULAR is set). At
1037 this point we have not seen all the input files, so it is
1038 possible that DEF_REGULAR is not set now but will be set
1039 later (it is never cleared). In case of a weak definition,
1040 DEF_REGULAR may be cleared later by a strong definition in
1041 a shared library. We account for that possibility below by
1042 storing information in the relocs_copied field of the hash
1043 table entry. A similar situation occurs when creating
1044 shared libraries and symbol visibility changes render the
1047 If on the other hand, we are creating an executable, we
1048 may need to keep relocations for symbols satisfied by a
1049 dynamic library if we manage to avoid copy relocs for the
1052 && (sec->flags & SEC_ALLOC) != 0
1053 && (r_type != R_386_PC32
1055 && (! info->symbolic
1056 || h->root.type == bfd_link_hash_defweak
1057 || (h->elf_link_hash_flags
1058 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1059 || (ELIMINATE_COPY_RELOCS
1061 && (sec->flags & SEC_ALLOC) != 0
1063 && (h->root.type == bfd_link_hash_defweak
1064 || (h->elf_link_hash_flags
1065 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1067 struct elf_i386_dyn_relocs *p;
1068 struct elf_i386_dyn_relocs **head;
1070 /* We must copy these reloc types into the output file.
1071 Create a reloc section in dynobj and make room for
1077 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1078 unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
1080 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
1084 if (strncmp (name, ".rel", 4) != 0
1085 || strcmp (bfd_get_section_name (abfd, sec),
1088 (*_bfd_error_handler)
1089 (_("%s: bad relocation section name `%s\'"),
1090 bfd_archive_filename (abfd), name);
1093 if (htab->elf.dynobj == NULL)
1094 htab->elf.dynobj = abfd;
1096 dynobj = htab->elf.dynobj;
1097 sreloc = bfd_get_section_by_name (dynobj, name);
1102 sreloc = bfd_make_section (dynobj, name);
1103 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1104 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1105 if ((sec->flags & SEC_ALLOC) != 0)
1106 flags |= SEC_ALLOC | SEC_LOAD;
1108 || ! bfd_set_section_flags (dynobj, sreloc, flags)
1109 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1112 elf_section_data (sec)->sreloc = sreloc;
1115 /* If this is a global symbol, we count the number of
1116 relocations we need for this symbol. */
1119 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1123 /* Track dynamic relocs needed for local syms too.
1124 We really need local syms available to do this
1128 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1133 head = ((struct elf_i386_dyn_relocs **)
1134 &elf_section_data (s)->local_dynrel);
1138 if (p == NULL || p->sec != sec)
1140 bfd_size_type amt = sizeof *p;
1141 p = bfd_alloc (htab->elf.dynobj, amt);
1152 if (r_type == R_386_PC32)
1157 /* This relocation describes the C++ object vtable hierarchy.
1158 Reconstruct it for later use during GC. */
1159 case R_386_GNU_VTINHERIT:
1160 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1164 /* This relocation describes which C++ vtable entries are actually
1165 used. Record for later use during GC. */
1166 case R_386_GNU_VTENTRY:
1167 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1179 /* Return the section that should be marked against GC for a given
1183 elf_i386_gc_mark_hook (asection *sec,
1184 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1185 Elf_Internal_Rela *rel,
1186 struct elf_link_hash_entry *h,
1187 Elf_Internal_Sym *sym)
1191 switch (ELF32_R_TYPE (rel->r_info))
1193 case R_386_GNU_VTINHERIT:
1194 case R_386_GNU_VTENTRY:
1198 switch (h->root.type)
1200 case bfd_link_hash_defined:
1201 case bfd_link_hash_defweak:
1202 return h->root.u.def.section;
1204 case bfd_link_hash_common:
1205 return h->root.u.c.p->section;
1213 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1218 /* Update the got entry reference counts for the section being removed. */
1221 elf_i386_gc_sweep_hook (bfd *abfd,
1222 struct bfd_link_info *info,
1224 const Elf_Internal_Rela *relocs)
1226 Elf_Internal_Shdr *symtab_hdr;
1227 struct elf_link_hash_entry **sym_hashes;
1228 bfd_signed_vma *local_got_refcounts;
1229 const Elf_Internal_Rela *rel, *relend;
1231 elf_section_data (sec)->local_dynrel = NULL;
1233 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1234 sym_hashes = elf_sym_hashes (abfd);
1235 local_got_refcounts = elf_local_got_refcounts (abfd);
1237 relend = relocs + sec->reloc_count;
1238 for (rel = relocs; rel < relend; rel++)
1240 unsigned long r_symndx;
1241 unsigned int r_type;
1242 struct elf_link_hash_entry *h = NULL;
1244 r_symndx = ELF32_R_SYM (rel->r_info);
1245 if (r_symndx >= symtab_hdr->sh_info)
1247 struct elf_i386_link_hash_entry *eh;
1248 struct elf_i386_dyn_relocs **pp;
1249 struct elf_i386_dyn_relocs *p;
1251 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1252 eh = (struct elf_i386_link_hash_entry *) h;
1254 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1257 /* Everything must go for SEC. */
1263 r_type = ELF32_R_TYPE (rel->r_info);
1264 r_type = elf_i386_tls_transition (info, r_type, h != NULL);
1268 if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1269 elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1273 case R_386_TLS_IE_32:
1275 case R_386_TLS_GOTIE:
1279 if (h->got.refcount > 0)
1280 h->got.refcount -= 1;
1282 else if (local_got_refcounts != NULL)
1284 if (local_got_refcounts[r_symndx] > 0)
1285 local_got_refcounts[r_symndx] -= 1;
1298 if (h->plt.refcount > 0)
1299 h->plt.refcount -= 1;
1311 /* Adjust a symbol defined by a dynamic object and referenced by a
1312 regular object. The current definition is in some section of the
1313 dynamic object, but we're not including those sections. We have to
1314 change the definition to something the rest of the link can
1318 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1319 struct elf_link_hash_entry *h)
1321 struct elf_i386_link_hash_table *htab;
1323 unsigned int power_of_two;
1325 /* If this is a function, put it in the procedure linkage table. We
1326 will fill in the contents of the procedure linkage table later,
1327 when we know the address of the .got section. */
1328 if (h->type == STT_FUNC
1329 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1331 if (h->plt.refcount <= 0
1332 || SYMBOL_CALLS_LOCAL (info, h)
1333 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1334 && h->root.type == bfd_link_hash_undefweak))
1336 /* This case can occur if we saw a PLT32 reloc in an input
1337 file, but the symbol was never referred to by a dynamic
1338 object, or if all references were garbage collected. In
1339 such a case, we don't actually need to build a procedure
1340 linkage table, and we can just do a PC32 reloc instead. */
1341 h->plt.offset = (bfd_vma) -1;
1342 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1348 /* It's possible that we incorrectly decided a .plt reloc was
1349 needed for an R_386_PC32 reloc to a non-function sym in
1350 check_relocs. We can't decide accurately between function and
1351 non-function syms in check-relocs; Objects loaded later in
1352 the link may change h->type. So fix it now. */
1353 h->plt.offset = (bfd_vma) -1;
1355 /* If this is a weak symbol, and there is a real definition, the
1356 processor independent code will have arranged for us to see the
1357 real definition first, and we can just use the same value. */
1358 if (h->weakdef != NULL)
1360 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1361 || h->weakdef->root.type == bfd_link_hash_defweak);
1362 h->root.u.def.section = h->weakdef->root.u.def.section;
1363 h->root.u.def.value = h->weakdef->root.u.def.value;
1364 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1365 h->elf_link_hash_flags
1366 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
1367 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
1371 /* This is a reference to a symbol defined by a dynamic object which
1372 is not a function. */
1374 /* If we are creating a shared library, we must presume that the
1375 only references to the symbol are via the global offset table.
1376 For such cases we need not do anything here; the relocations will
1377 be handled correctly by relocate_section. */
1381 /* If there are no references to this symbol that do not use the
1382 GOT, we don't need to generate a copy reloc. */
1383 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1386 /* If -z nocopyreloc was given, we won't generate them either. */
1387 if (info->nocopyreloc)
1389 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1393 if (ELIMINATE_COPY_RELOCS)
1395 struct elf_i386_link_hash_entry * eh;
1396 struct elf_i386_dyn_relocs *p;
1398 eh = (struct elf_i386_link_hash_entry *) h;
1399 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1401 s = p->sec->output_section;
1402 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1406 /* If we didn't find any dynamic relocs in read-only sections, then
1407 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1410 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1415 /* We must allocate the symbol in our .dynbss section, which will
1416 become part of the .bss section of the executable. There will be
1417 an entry for this symbol in the .dynsym section. The dynamic
1418 object will contain position independent code, so all references
1419 from the dynamic object to this symbol will go through the global
1420 offset table. The dynamic linker will use the .dynsym entry to
1421 determine the address it must put in the global offset table, so
1422 both the dynamic object and the regular object will refer to the
1423 same memory location for the variable. */
1425 htab = elf_i386_hash_table (info);
1427 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1428 copy the initial value out of the dynamic object and into the
1429 runtime process image. */
1430 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1432 htab->srelbss->_raw_size += sizeof (Elf32_External_Rel);
1433 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1436 /* We need to figure out the alignment required for this symbol. I
1437 have no idea how ELF linkers handle this. */
1438 power_of_two = bfd_log2 (h->size);
1439 if (power_of_two > 3)
1442 /* Apply the required alignment. */
1444 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1445 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1447 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1451 /* Define the symbol as being at this point in the section. */
1452 h->root.u.def.section = s;
1453 h->root.u.def.value = s->_raw_size;
1455 /* Increment the section size to make room for the symbol. */
1456 s->_raw_size += h->size;
1461 /* This is the condition under which elf_i386_finish_dynamic_symbol
1462 will be called from elflink.h. If elflink.h doesn't call our
1463 finish_dynamic_symbol routine, we'll need to do something about
1464 initializing any .plt and .got entries in elf_i386_relocate_section. */
1465 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
1468 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1469 && ((H)->dynindx != -1 \
1470 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1472 /* Allocate space in .plt, .got and associated reloc sections for
1476 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1478 struct bfd_link_info *info;
1479 struct elf_i386_link_hash_table *htab;
1480 struct elf_i386_link_hash_entry *eh;
1481 struct elf_i386_dyn_relocs *p;
1483 if (h->root.type == bfd_link_hash_indirect)
1486 if (h->root.type == bfd_link_hash_warning)
1487 /* When warning symbols are created, they **replace** the "real"
1488 entry in the hash table, thus we never get to see the real
1489 symbol in a hash traversal. So look at it now. */
1490 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1492 info = (struct bfd_link_info *) inf;
1493 htab = elf_i386_hash_table (info);
1495 if (htab->elf.dynamic_sections_created
1496 && h->plt.refcount > 0)
1498 /* Make sure this symbol is output as a dynamic symbol.
1499 Undefined weak syms won't yet be marked as dynamic. */
1500 if (h->dynindx == -1
1501 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1503 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1508 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1510 asection *s = htab->splt;
1512 /* If this is the first .plt entry, make room for the special
1514 if (s->_raw_size == 0)
1515 s->_raw_size += PLT_ENTRY_SIZE;
1517 h->plt.offset = s->_raw_size;
1519 /* If this symbol is not defined in a regular file, and we are
1520 not generating a shared library, then set the symbol to this
1521 location in the .plt. This is required to make function
1522 pointers compare as equal between the normal executable and
1523 the shared library. */
1525 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1527 h->root.u.def.section = s;
1528 h->root.u.def.value = h->plt.offset;
1531 /* Make room for this entry. */
1532 s->_raw_size += PLT_ENTRY_SIZE;
1534 /* We also need to make an entry in the .got.plt section, which
1535 will be placed in the .got section by the linker script. */
1536 htab->sgotplt->_raw_size += 4;
1538 /* We also need to make an entry in the .rel.plt section. */
1539 htab->srelplt->_raw_size += sizeof (Elf32_External_Rel);
1543 h->plt.offset = (bfd_vma) -1;
1544 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1549 h->plt.offset = (bfd_vma) -1;
1550 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1553 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1554 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1555 if (h->got.refcount > 0
1558 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
1559 h->got.offset = (bfd_vma) -1;
1560 else if (h->got.refcount > 0)
1564 int tls_type = elf_i386_hash_entry(h)->tls_type;
1566 /* Make sure this symbol is output as a dynamic symbol.
1567 Undefined weak syms won't yet be marked as dynamic. */
1568 if (h->dynindx == -1
1569 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1571 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1576 h->got.offset = s->_raw_size;
1578 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1579 if (tls_type == GOT_TLS_GD || tls_type == GOT_TLS_IE_BOTH)
1581 dyn = htab->elf.dynamic_sections_created;
1582 /* R_386_TLS_IE_32 needs one dynamic relocation,
1583 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1584 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1585 need two), R_386_TLS_GD needs one if local symbol and two if
1587 if (tls_type == GOT_TLS_IE_BOTH)
1588 htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rel);
1589 else if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1590 || (tls_type & GOT_TLS_IE))
1591 htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
1592 else if (tls_type == GOT_TLS_GD)
1593 htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rel);
1594 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1595 || h->root.type != bfd_link_hash_undefweak)
1597 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1598 htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
1601 h->got.offset = (bfd_vma) -1;
1603 eh = (struct elf_i386_link_hash_entry *) h;
1604 if (eh->dyn_relocs == NULL)
1607 /* In the shared -Bsymbolic case, discard space allocated for
1608 dynamic pc-relative relocs against symbols which turn out to be
1609 defined in regular objects. For the normal shared case, discard
1610 space for pc-relative relocs that have become local due to symbol
1611 visibility changes. */
1615 /* The only reloc that uses pc_count is R_386_PC32, which will
1616 appear on a call or on something like ".long foo - .". We
1617 want calls to protected symbols to resolve directly to the
1618 function rather than going via the plt. If people want
1619 function pointer comparisons to work as expected then they
1620 should avoid writing assembly like ".long foo - .". */
1621 if (SYMBOL_CALLS_LOCAL (info, h))
1623 struct elf_i386_dyn_relocs **pp;
1625 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1627 p->count -= p->pc_count;
1636 /* Also discard relocs on undefined weak syms with non-default
1638 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1639 && h->root.type == bfd_link_hash_undefweak)
1640 eh->dyn_relocs = NULL;
1642 else if (ELIMINATE_COPY_RELOCS)
1644 /* For the non-shared case, discard space for relocs against
1645 symbols which turn out to need copy relocs or are not
1648 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1649 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1650 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1651 || (htab->elf.dynamic_sections_created
1652 && (h->root.type == bfd_link_hash_undefweak
1653 || h->root.type == bfd_link_hash_undefined))))
1655 /* Make sure this symbol is output as a dynamic symbol.
1656 Undefined weak syms won't yet be marked as dynamic. */
1657 if (h->dynindx == -1
1658 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1660 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1664 /* If that succeeded, we know we'll be keeping all the
1666 if (h->dynindx != -1)
1670 eh->dyn_relocs = NULL;
1675 /* Finally, allocate space. */
1676 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1678 asection *sreloc = elf_section_data (p->sec)->sreloc;
1679 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel);
1685 /* Find any dynamic relocs that apply to read-only sections. */
1688 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1690 struct elf_i386_link_hash_entry *eh;
1691 struct elf_i386_dyn_relocs *p;
1693 if (h->root.type == bfd_link_hash_warning)
1694 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1696 eh = (struct elf_i386_link_hash_entry *) h;
1697 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1699 asection *s = p->sec->output_section;
1701 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1703 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1705 info->flags |= DF_TEXTREL;
1707 /* Not an error, just cut short the traversal. */
1714 /* Set the sizes of the dynamic sections. */
1717 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1718 struct bfd_link_info *info)
1720 struct elf_i386_link_hash_table *htab;
1726 htab = elf_i386_hash_table (info);
1727 dynobj = htab->elf.dynobj;
1731 if (htab->elf.dynamic_sections_created)
1733 /* Set the contents of the .interp section to the interpreter. */
1734 if (info->executable)
1736 s = bfd_get_section_by_name (dynobj, ".interp");
1739 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1740 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1744 /* Set up .got offsets for local syms, and space for local dynamic
1746 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1748 bfd_signed_vma *local_got;
1749 bfd_signed_vma *end_local_got;
1750 char *local_tls_type;
1751 bfd_size_type locsymcount;
1752 Elf_Internal_Shdr *symtab_hdr;
1755 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1758 for (s = ibfd->sections; s != NULL; s = s->next)
1760 struct elf_i386_dyn_relocs *p;
1762 for (p = *((struct elf_i386_dyn_relocs **)
1763 &elf_section_data (s)->local_dynrel);
1767 if (!bfd_is_abs_section (p->sec)
1768 && bfd_is_abs_section (p->sec->output_section))
1770 /* Input section has been discarded, either because
1771 it is a copy of a linkonce section or due to
1772 linker script /DISCARD/, so we'll be discarding
1775 else if (p->count != 0)
1777 srel = elf_section_data (p->sec)->sreloc;
1778 srel->_raw_size += p->count * sizeof (Elf32_External_Rel);
1779 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1780 info->flags |= DF_TEXTREL;
1785 local_got = elf_local_got_refcounts (ibfd);
1789 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1790 locsymcount = symtab_hdr->sh_info;
1791 end_local_got = local_got + locsymcount;
1792 local_tls_type = elf_i386_local_got_tls_type (ibfd);
1794 srel = htab->srelgot;
1795 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1799 *local_got = s->_raw_size;
1801 if (*local_tls_type == GOT_TLS_GD
1802 || *local_tls_type == GOT_TLS_IE_BOTH)
1805 || *local_tls_type == GOT_TLS_GD
1806 || (*local_tls_type & GOT_TLS_IE))
1808 if (*local_tls_type == GOT_TLS_IE_BOTH)
1809 srel->_raw_size += 2 * sizeof (Elf32_External_Rel);
1811 srel->_raw_size += sizeof (Elf32_External_Rel);
1815 *local_got = (bfd_vma) -1;
1819 if (htab->tls_ldm_got.refcount > 0)
1821 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1823 htab->tls_ldm_got.offset = htab->sgot->_raw_size;
1824 htab->sgot->_raw_size += 8;
1825 htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
1828 htab->tls_ldm_got.offset = -1;
1830 /* Allocate global sym .plt and .got entries, and space for global
1831 sym dynamic relocs. */
1832 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1834 /* We now have determined the sizes of the various dynamic sections.
1835 Allocate memory for them. */
1837 for (s = dynobj->sections; s != NULL; s = s->next)
1839 if ((s->flags & SEC_LINKER_CREATED) == 0)
1844 || s == htab->sgotplt)
1846 /* Strip this section if we don't need it; see the
1849 else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0)
1851 if (s->_raw_size != 0 && s != htab->srelplt)
1854 /* We use the reloc_count field as a counter if we need
1855 to copy relocs into the output file. */
1860 /* It's not one of our sections, so don't allocate space. */
1864 if (s->_raw_size == 0)
1866 /* If we don't need this section, strip it from the
1867 output file. This is mostly to handle .rel.bss and
1868 .rel.plt. We must create both sections in
1869 create_dynamic_sections, because they must be created
1870 before the linker maps input sections to output
1871 sections. The linker does that before
1872 adjust_dynamic_symbol is called, and it is that
1873 function which decides whether anything needs to go
1874 into these sections. */
1876 _bfd_strip_section_from_output (info, s);
1880 /* Allocate memory for the section contents. We use bfd_zalloc
1881 here in case unused entries are not reclaimed before the
1882 section's contents are written out. This should not happen,
1883 but this way if it does, we get a R_386_NONE reloc instead
1885 s->contents = bfd_zalloc (dynobj, s->_raw_size);
1886 if (s->contents == NULL)
1890 if (htab->elf.dynamic_sections_created)
1892 /* Add some entries to the .dynamic section. We fill in the
1893 values later, in elf_i386_finish_dynamic_sections, but we
1894 must add the entries now so that we get the correct size for
1895 the .dynamic section. The DT_DEBUG entry is filled in by the
1896 dynamic linker and used by the debugger. */
1897 #define add_dynamic_entry(TAG, VAL) \
1898 bfd_elf32_add_dynamic_entry (info, (TAG), (VAL))
1900 if (info->executable)
1902 if (!add_dynamic_entry (DT_DEBUG, 0))
1906 if (htab->splt->_raw_size != 0)
1908 if (!add_dynamic_entry (DT_PLTGOT, 0)
1909 || !add_dynamic_entry (DT_PLTRELSZ, 0)
1910 || !add_dynamic_entry (DT_PLTREL, DT_REL)
1911 || !add_dynamic_entry (DT_JMPREL, 0))
1917 if (!add_dynamic_entry (DT_REL, 0)
1918 || !add_dynamic_entry (DT_RELSZ, 0)
1919 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
1922 /* If any dynamic relocs apply to a read-only section,
1923 then we need a DT_TEXTREL entry. */
1924 if ((info->flags & DF_TEXTREL) == 0)
1925 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
1928 if ((info->flags & DF_TEXTREL) != 0)
1930 if (!add_dynamic_entry (DT_TEXTREL, 0))
1935 #undef add_dynamic_entry
1940 /* Set the correct type for an x86 ELF section. We do this by the
1941 section name, which is a hack, but ought to work. */
1944 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1945 Elf_Internal_Shdr *hdr,
1948 register const char *name;
1950 name = bfd_get_section_name (abfd, sec);
1952 /* This is an ugly, but unfortunately necessary hack that is
1953 needed when producing EFI binaries on x86. It tells
1954 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1955 containing ELF relocation info. We need this hack in order to
1956 be able to generate ELF binaries that can be translated into
1957 EFI applications (which are essentially COFF objects). Those
1958 files contain a COFF ".reloc" section inside an ELFNN object,
1959 which would normally cause BFD to segfault because it would
1960 attempt to interpret this section as containing relocation
1961 entries for section "oc". With this hack enabled, ".reloc"
1962 will be treated as a normal data section, which will avoid the
1963 segfault. However, you won't be able to create an ELFNN binary
1964 with a section named "oc" that needs relocations, but that's
1965 the kind of ugly side-effects you get when detecting section
1966 types based on their names... In practice, this limitation is
1967 unlikely to bite. */
1968 if (strcmp (name, ".reloc") == 0)
1969 hdr->sh_type = SHT_PROGBITS;
1974 /* Return the base VMA address which should be subtracted from real addresses
1975 when resolving @dtpoff relocation.
1976 This is PT_TLS segment p_vaddr. */
1979 dtpoff_base (struct bfd_link_info *info)
1981 /* If tls_sec is NULL, we should have signalled an error already. */
1982 if (elf_hash_table (info)->tls_sec == NULL)
1984 return elf_hash_table (info)->tls_sec->vma;
1987 /* Return the relocation value for @tpoff relocation
1988 if STT_TLS virtual address is ADDRESS. */
1991 tpoff (struct bfd_link_info *info, bfd_vma address)
1993 struct elf_link_hash_table *htab = elf_hash_table (info);
1995 /* If tls_sec is NULL, we should have signalled an error already. */
1996 if (htab->tls_sec == NULL)
1998 return htab->tls_size + htab->tls_sec->vma - address;
2001 /* Relocate an i386 ELF section. */
2004 elf_i386_relocate_section (bfd *output_bfd,
2005 struct bfd_link_info *info,
2007 asection *input_section,
2009 Elf_Internal_Rela *relocs,
2010 Elf_Internal_Sym *local_syms,
2011 asection **local_sections)
2013 struct elf_i386_link_hash_table *htab;
2014 Elf_Internal_Shdr *symtab_hdr;
2015 struct elf_link_hash_entry **sym_hashes;
2016 bfd_vma *local_got_offsets;
2017 Elf_Internal_Rela *rel;
2018 Elf_Internal_Rela *relend;
2020 htab = elf_i386_hash_table (info);
2021 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2022 sym_hashes = elf_sym_hashes (input_bfd);
2023 local_got_offsets = elf_local_got_offsets (input_bfd);
2026 relend = relocs + input_section->reloc_count;
2027 for (; rel < relend; rel++)
2029 unsigned int r_type;
2030 reloc_howto_type *howto;
2031 unsigned long r_symndx;
2032 struct elf_link_hash_entry *h;
2033 Elf_Internal_Sym *sym;
2037 bfd_boolean unresolved_reloc;
2038 bfd_reloc_status_type r;
2042 r_type = ELF32_R_TYPE (rel->r_info);
2043 if (r_type == R_386_GNU_VTINHERIT
2044 || r_type == R_386_GNU_VTENTRY)
2047 if ((indx = r_type) >= R_386_standard
2048 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2049 >= R_386_ext - R_386_standard)
2050 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2051 >= R_386_tls - R_386_ext))
2053 bfd_set_error (bfd_error_bad_value);
2056 howto = elf_howto_table + indx;
2058 r_symndx = ELF32_R_SYM (rel->r_info);
2060 if (info->relocatable)
2065 /* This is a relocatable link. We don't have to change
2066 anything, unless the reloc is against a section symbol,
2067 in which case we have to adjust according to where the
2068 section symbol winds up in the output section. */
2069 if (r_symndx >= symtab_hdr->sh_info)
2072 sym = local_syms + r_symndx;
2073 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2076 sec = local_sections[r_symndx];
2077 val = sec->output_offset;
2081 where = contents + rel->r_offset;
2082 switch (howto->size)
2084 /* FIXME: overflow checks. */
2086 val += bfd_get_8 (input_bfd, where);
2087 bfd_put_8 (input_bfd, val, where);
2090 val += bfd_get_16 (input_bfd, where);
2091 bfd_put_16 (input_bfd, val, where);
2094 val += bfd_get_32 (input_bfd, where);
2095 bfd_put_32 (input_bfd, val, where);
2103 /* This is a final link. */
2107 unresolved_reloc = FALSE;
2108 if (r_symndx < symtab_hdr->sh_info)
2110 sym = local_syms + r_symndx;
2111 sec = local_sections[r_symndx];
2112 relocation = (sec->output_section->vma
2113 + sec->output_offset
2115 if ((sec->flags & SEC_MERGE)
2116 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2120 bfd_byte *where = contents + rel->r_offset;
2122 switch (howto->size)
2125 addend = bfd_get_8 (input_bfd, where);
2126 if (howto->pc_relative)
2128 addend = (addend ^ 0x80) - 0x80;
2133 addend = bfd_get_16 (input_bfd, where);
2134 if (howto->pc_relative)
2136 addend = (addend ^ 0x8000) - 0x8000;
2141 addend = bfd_get_32 (input_bfd, where);
2142 if (howto->pc_relative)
2144 addend = (addend ^ 0x80000000) - 0x80000000;
2153 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend);
2154 addend -= relocation;
2155 addend += msec->output_section->vma + msec->output_offset;
2157 switch (howto->size)
2160 /* FIXME: overflow checks. */
2161 if (howto->pc_relative)
2163 bfd_put_8 (input_bfd, addend, where);
2166 if (howto->pc_relative)
2168 bfd_put_16 (input_bfd, addend, where);
2171 if (howto->pc_relative)
2173 bfd_put_32 (input_bfd, addend, where);
2182 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2183 r_symndx, symtab_hdr, sym_hashes,
2185 unresolved_reloc, warned);
2191 /* Relocation is to the entry for this symbol in the global
2193 if (htab->sgot == NULL)
2200 off = h->got.offset;
2201 dyn = htab->elf.dynamic_sections_created;
2202 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2204 && SYMBOL_REFERENCES_LOCAL (info, h))
2205 || (ELF_ST_VISIBILITY (h->other)
2206 && h->root.type == bfd_link_hash_undefweak))
2208 /* This is actually a static link, or it is a
2209 -Bsymbolic link and the symbol is defined
2210 locally, or the symbol was forced to be local
2211 because of a version file. We must initialize
2212 this entry in the global offset table. Since the
2213 offset must always be a multiple of 4, we use the
2214 least significant bit to record whether we have
2215 initialized it already.
2217 When doing a dynamic link, we create a .rel.got
2218 relocation entry to initialize the value. This
2219 is done in the finish_dynamic_symbol routine. */
2224 bfd_put_32 (output_bfd, relocation,
2225 htab->sgot->contents + off);
2230 unresolved_reloc = FALSE;
2234 if (local_got_offsets == NULL)
2237 off = local_got_offsets[r_symndx];
2239 /* The offset must always be a multiple of 4. We use
2240 the least significant bit to record whether we have
2241 already generated the necessary reloc. */
2246 bfd_put_32 (output_bfd, relocation,
2247 htab->sgot->contents + off);
2252 Elf_Internal_Rela outrel;
2259 outrel.r_offset = (htab->sgot->output_section->vma
2260 + htab->sgot->output_offset
2262 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2264 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
2265 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2268 local_got_offsets[r_symndx] |= 1;
2272 if (off >= (bfd_vma) -2)
2275 relocation = htab->sgot->output_offset + off;
2279 /* Relocation is relative to the start of the global offset
2282 /* Note that sgot->output_offset is not involved in this
2283 calculation. We always want the start of .got. If we
2284 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2285 permitted by the ABI, we might have to change this
2287 relocation -= htab->sgot->output_section->vma;
2291 /* Use global offset table as symbol value. */
2292 relocation = htab->sgot->output_section->vma;
2293 unresolved_reloc = FALSE;
2297 /* Relocation is to the entry for this symbol in the
2298 procedure linkage table. */
2300 /* Resolve a PLT32 reloc against a local symbol directly,
2301 without using the procedure linkage table. */
2305 if (h->plt.offset == (bfd_vma) -1
2306 || htab->splt == NULL)
2308 /* We didn't make a PLT entry for this symbol. This
2309 happens when statically linking PIC code, or when
2310 using -Bsymbolic. */
2314 relocation = (htab->splt->output_section->vma
2315 + htab->splt->output_offset
2317 unresolved_reloc = FALSE;
2322 /* r_symndx will be zero only for relocs against symbols
2323 from removed linkonce sections, or sections discarded by
2326 || (input_section->flags & SEC_ALLOC) == 0)
2331 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2332 || h->root.type != bfd_link_hash_undefweak)
2333 && (r_type != R_386_PC32
2334 || !SYMBOL_CALLS_LOCAL (info, h)))
2335 || (ELIMINATE_COPY_RELOCS
2339 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2340 && (((h->elf_link_hash_flags
2341 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2342 && (h->elf_link_hash_flags
2343 & ELF_LINK_HASH_DEF_REGULAR) == 0)
2344 || h->root.type == bfd_link_hash_undefweak
2345 || h->root.type == bfd_link_hash_undefined)))
2347 Elf_Internal_Rela outrel;
2349 bfd_boolean skip, relocate;
2352 /* When generating a shared object, these relocations
2353 are copied into the output file to be resolved at run
2360 _bfd_elf_section_offset (output_bfd, info, input_section,
2362 if (outrel.r_offset == (bfd_vma) -1)
2364 else if (outrel.r_offset == (bfd_vma) -2)
2365 skip = TRUE, relocate = TRUE;
2366 outrel.r_offset += (input_section->output_section->vma
2367 + input_section->output_offset);
2370 memset (&outrel, 0, sizeof outrel);
2373 && (r_type == R_386_PC32
2376 || (h->elf_link_hash_flags
2377 & ELF_LINK_HASH_DEF_REGULAR) == 0))
2378 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2381 /* This symbol is local, or marked to become local. */
2383 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2386 sreloc = elf_section_data (input_section)->sreloc;
2390 loc = sreloc->contents;
2391 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2392 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2394 /* If this reloc is against an external symbol, we do
2395 not want to fiddle with the addend. Otherwise, we
2396 need to include the symbol value so that it becomes
2397 an addend for the dynamic reloc. */
2406 Elf_Internal_Rela outrel;
2410 outrel.r_offset = rel->r_offset
2411 + input_section->output_section->vma
2412 + input_section->output_offset;
2413 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2414 sreloc = elf_section_data (input_section)->sreloc;
2417 loc = sreloc->contents;
2418 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2419 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2424 case R_386_TLS_IE_32:
2425 case R_386_TLS_GOTIE:
2426 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
2427 tls_type = GOT_UNKNOWN;
2428 if (h == NULL && local_got_offsets)
2429 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
2432 tls_type = elf_i386_hash_entry(h)->tls_type;
2433 if (!info->shared && h->dynindx == -1 && (tls_type & GOT_TLS_IE))
2434 r_type = R_386_TLS_LE_32;
2436 if (tls_type == GOT_TLS_IE)
2437 tls_type = GOT_TLS_IE_NEG;
2438 if (r_type == R_386_TLS_GD)
2440 if (tls_type == GOT_TLS_IE_POS)
2441 r_type = R_386_TLS_GOTIE;
2442 else if (tls_type & GOT_TLS_IE)
2443 r_type = R_386_TLS_IE_32;
2446 if (r_type == R_386_TLS_LE_32)
2448 BFD_ASSERT (! unresolved_reloc);
2449 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
2451 unsigned int val, type;
2454 /* GD->LE transition. */
2455 BFD_ASSERT (rel->r_offset >= 2);
2456 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2457 BFD_ASSERT (type == 0x8d || type == 0x04);
2458 BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2459 BFD_ASSERT (bfd_get_8 (input_bfd,
2460 contents + rel->r_offset + 4)
2462 BFD_ASSERT (rel + 1 < relend);
2463 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2464 roff = rel->r_offset + 5;
2465 val = bfd_get_8 (input_bfd,
2466 contents + rel->r_offset - 1);
2469 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2471 movl %gs:0, %eax; subl $foo@tpoff, %eax
2472 (6 byte form of subl). */
2473 BFD_ASSERT (rel->r_offset >= 3);
2474 BFD_ASSERT (bfd_get_8 (input_bfd,
2475 contents + rel->r_offset - 3)
2477 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2478 memcpy (contents + rel->r_offset - 3,
2479 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2483 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2484 if (rel->r_offset + 10 <= input_section->_raw_size
2485 && bfd_get_8 (input_bfd,
2486 contents + rel->r_offset + 9) == 0x90)
2488 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2490 movl %gs:0, %eax; subl $foo@tpoff, %eax
2491 (6 byte form of subl). */
2492 memcpy (contents + rel->r_offset - 2,
2493 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2494 roff = rel->r_offset + 6;
2498 /* leal foo(%reg), %eax; call ___tls_get_addr
2500 movl %gs:0, %eax; subl $foo@tpoff, %eax
2501 (5 byte form of subl). */
2502 memcpy (contents + rel->r_offset - 2,
2503 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2506 bfd_put_32 (output_bfd, tpoff (info, relocation),
2508 /* Skip R_386_PLT32. */
2512 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
2514 unsigned int val, type;
2516 /* IE->LE transition:
2517 Originally it can be one of:
2525 BFD_ASSERT (rel->r_offset >= 1);
2526 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2527 BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size);
2530 /* movl foo, %eax. */
2531 bfd_put_8 (output_bfd, 0xb8,
2532 contents + rel->r_offset - 1);
2536 BFD_ASSERT (rel->r_offset >= 2);
2537 type = bfd_get_8 (input_bfd,
2538 contents + rel->r_offset - 2);
2543 BFD_ASSERT ((val & 0xc7) == 0x05);
2544 bfd_put_8 (output_bfd, 0xc7,
2545 contents + rel->r_offset - 2);
2546 bfd_put_8 (output_bfd,
2547 0xc0 | ((val >> 3) & 7),
2548 contents + rel->r_offset - 1);
2552 BFD_ASSERT ((val & 0xc7) == 0x05);
2553 bfd_put_8 (output_bfd, 0x81,
2554 contents + rel->r_offset - 2);
2555 bfd_put_8 (output_bfd,
2556 0xc0 | ((val >> 3) & 7),
2557 contents + rel->r_offset - 1);
2564 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2565 contents + rel->r_offset);
2570 unsigned int val, type;
2572 /* {IE_32,GOTIE}->LE transition:
2573 Originally it can be one of:
2574 subl foo(%reg1), %reg2
2575 movl foo(%reg1), %reg2
2576 addl foo(%reg1), %reg2
2579 movl $foo, %reg2 (6 byte form)
2580 addl $foo, %reg2. */
2581 BFD_ASSERT (rel->r_offset >= 2);
2582 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2583 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2584 BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size);
2585 BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4);
2589 bfd_put_8 (output_bfd, 0xc7,
2590 contents + rel->r_offset - 2);
2591 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2592 contents + rel->r_offset - 1);
2594 else if (type == 0x2b)
2597 bfd_put_8 (output_bfd, 0x81,
2598 contents + rel->r_offset - 2);
2599 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2600 contents + rel->r_offset - 1);
2602 else if (type == 0x03)
2605 bfd_put_8 (output_bfd, 0x81,
2606 contents + rel->r_offset - 2);
2607 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2608 contents + rel->r_offset - 1);
2612 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
2613 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2614 contents + rel->r_offset);
2616 bfd_put_32 (output_bfd, tpoff (info, relocation),
2617 contents + rel->r_offset);
2622 if (htab->sgot == NULL)
2626 off = h->got.offset;
2629 if (local_got_offsets == NULL)
2632 off = local_got_offsets[r_symndx];
2639 Elf_Internal_Rela outrel;
2643 if (htab->srelgot == NULL)
2646 outrel.r_offset = (htab->sgot->output_section->vma
2647 + htab->sgot->output_offset + off);
2649 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2650 if (r_type == R_386_TLS_GD)
2651 dr_type = R_386_TLS_DTPMOD32;
2652 else if (tls_type == GOT_TLS_IE_POS)
2653 dr_type = R_386_TLS_TPOFF;
2655 dr_type = R_386_TLS_TPOFF32;
2656 if (dr_type == R_386_TLS_TPOFF && indx == 0)
2657 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
2658 htab->sgot->contents + off);
2659 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
2660 bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
2661 htab->sgot->contents + off);
2663 bfd_put_32 (output_bfd, 0,
2664 htab->sgot->contents + off);
2665 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2666 loc = htab->srelgot->contents;
2667 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2668 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2670 if (r_type == R_386_TLS_GD)
2674 BFD_ASSERT (! unresolved_reloc);
2675 bfd_put_32 (output_bfd,
2676 relocation - dtpoff_base (info),
2677 htab->sgot->contents + off + 4);
2681 bfd_put_32 (output_bfd, 0,
2682 htab->sgot->contents + off + 4);
2683 outrel.r_info = ELF32_R_INFO (indx,
2684 R_386_TLS_DTPOFF32);
2685 outrel.r_offset += 4;
2686 htab->srelgot->reloc_count++;
2687 loc += sizeof (Elf32_External_Rel);
2688 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2691 else if (tls_type == GOT_TLS_IE_BOTH)
2693 bfd_put_32 (output_bfd,
2694 indx == 0 ? relocation - dtpoff_base (info) : 0,
2695 htab->sgot->contents + off + 4);
2696 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
2697 outrel.r_offset += 4;
2698 htab->srelgot->reloc_count++;
2699 loc += sizeof (Elf32_External_Rel);
2700 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2706 local_got_offsets[r_symndx] |= 1;
2709 if (off >= (bfd_vma) -2)
2711 if (r_type == ELF32_R_TYPE (rel->r_info))
2713 relocation = htab->sgot->output_offset + off;
2714 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
2715 && tls_type == GOT_TLS_IE_BOTH)
2717 if (r_type == R_386_TLS_IE)
2718 relocation += htab->sgot->output_section->vma;
2719 unresolved_reloc = FALSE;
2723 unsigned int val, type;
2726 /* GD->IE transition. */
2727 BFD_ASSERT (rel->r_offset >= 2);
2728 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2729 BFD_ASSERT (type == 0x8d || type == 0x04);
2730 BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2731 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2733 BFD_ASSERT (rel + 1 < relend);
2734 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2735 roff = rel->r_offset - 3;
2736 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2739 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2741 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2742 BFD_ASSERT (rel->r_offset >= 3);
2743 BFD_ASSERT (bfd_get_8 (input_bfd,
2744 contents + rel->r_offset - 3)
2746 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2751 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2753 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
2754 BFD_ASSERT (rel->r_offset + 10 <= input_section->_raw_size);
2755 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2756 BFD_ASSERT (bfd_get_8 (input_bfd,
2757 contents + rel->r_offset + 9)
2759 roff = rel->r_offset - 2;
2761 memcpy (contents + roff,
2762 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
2763 contents[roff + 7] = 0x80 | (val & 7);
2764 /* If foo is used only with foo@gotntpoff(%reg) and
2765 foo@indntpoff, but not with foo@gottpoff(%reg), change
2766 subl $foo@gottpoff(%reg), %eax
2768 addl $foo@gotntpoff(%reg), %eax. */
2769 if (r_type == R_386_TLS_GOTIE)
2771 contents[roff + 6] = 0x03;
2772 if (tls_type == GOT_TLS_IE_BOTH)
2775 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2776 contents + roff + 8);
2777 /* Skip R_386_PLT32. */
2788 /* LD->LE transition:
2790 leal foo(%reg), %eax; call ___tls_get_addr.
2792 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
2793 BFD_ASSERT (rel->r_offset >= 2);
2794 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
2796 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2797 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2798 BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
2799 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
2801 BFD_ASSERT (rel + 1 < relend);
2802 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2803 memcpy (contents + rel->r_offset - 2,
2804 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
2805 /* Skip R_386_PLT32. */
2810 if (htab->sgot == NULL)
2813 off = htab->tls_ldm_got.offset;
2818 Elf_Internal_Rela outrel;
2821 if (htab->srelgot == NULL)
2824 outrel.r_offset = (htab->sgot->output_section->vma
2825 + htab->sgot->output_offset + off);
2827 bfd_put_32 (output_bfd, 0,
2828 htab->sgot->contents + off);
2829 bfd_put_32 (output_bfd, 0,
2830 htab->sgot->contents + off + 4);
2831 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
2832 loc = htab->srelgot->contents;
2833 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
2834 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2835 htab->tls_ldm_got.offset |= 1;
2837 relocation = htab->sgot->output_offset + off;
2838 unresolved_reloc = FALSE;
2841 case R_386_TLS_LDO_32:
2842 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2843 relocation -= dtpoff_base (info);
2845 /* When converting LDO to LE, we must negate. */
2846 relocation = -tpoff (info, relocation);
2849 case R_386_TLS_LE_32:
2853 Elf_Internal_Rela outrel;
2858 outrel.r_offset = rel->r_offset
2859 + input_section->output_section->vma
2860 + input_section->output_offset;
2861 if (h != NULL && h->dynindx != -1)
2865 if (r_type == R_386_TLS_LE_32)
2866 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
2868 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
2869 sreloc = elf_section_data (input_section)->sreloc;
2872 loc = sreloc->contents;
2873 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2874 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2877 else if (r_type == R_386_TLS_LE_32)
2878 relocation = dtpoff_base (info) - relocation;
2880 relocation -= dtpoff_base (info);
2882 else if (r_type == R_386_TLS_LE_32)
2883 relocation = tpoff (info, relocation);
2885 relocation = -tpoff (info, relocation);
2892 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2893 because such sections are not SEC_ALLOC and thus ld.so will
2894 not process them. */
2895 if (unresolved_reloc
2896 && !((input_section->flags & SEC_DEBUGGING) != 0
2897 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2899 (*_bfd_error_handler)
2900 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2901 bfd_archive_filename (input_bfd),
2902 bfd_get_section_name (input_bfd, input_section),
2903 (long) rel->r_offset,
2904 h->root.root.string);
2908 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2909 contents, rel->r_offset,
2912 if (r != bfd_reloc_ok)
2917 name = h->root.root.string;
2920 name = bfd_elf_string_from_elf_section (input_bfd,
2921 symtab_hdr->sh_link,
2926 name = bfd_section_name (input_bfd, sec);
2929 if (r == bfd_reloc_overflow)
2931 if (! ((*info->callbacks->reloc_overflow)
2932 (info, name, howto->name, 0,
2933 input_bfd, input_section, rel->r_offset)))
2938 (*_bfd_error_handler)
2939 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
2940 bfd_archive_filename (input_bfd),
2941 bfd_get_section_name (input_bfd, input_section),
2942 (long) rel->r_offset, name, (int) r);
2951 /* Finish up dynamic symbol handling. We set the contents of various
2952 dynamic sections here. */
2955 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
2956 struct bfd_link_info *info,
2957 struct elf_link_hash_entry *h,
2958 Elf_Internal_Sym *sym)
2960 struct elf_i386_link_hash_table *htab;
2962 htab = elf_i386_hash_table (info);
2964 if (h->plt.offset != (bfd_vma) -1)
2968 Elf_Internal_Rela rel;
2971 /* This symbol has an entry in the procedure linkage table. Set
2974 if (h->dynindx == -1
2975 || htab->splt == NULL
2976 || htab->sgotplt == NULL
2977 || htab->srelplt == NULL)
2980 /* Get the index in the procedure linkage table which
2981 corresponds to this symbol. This is the index of this symbol
2982 in all the symbols for which we are making plt entries. The
2983 first entry in the procedure linkage table is reserved. */
2984 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
2986 /* Get the offset into the .got table of the entry that
2987 corresponds to this function. Each .got entry is 4 bytes.
2988 The first three are reserved. */
2989 got_offset = (plt_index + 3) * 4;
2991 /* Fill in the entry in the procedure linkage table. */
2994 memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
2996 bfd_put_32 (output_bfd,
2997 (htab->sgotplt->output_section->vma
2998 + htab->sgotplt->output_offset
3000 htab->splt->contents + h->plt.offset + 2);
3004 memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
3006 bfd_put_32 (output_bfd, got_offset,
3007 htab->splt->contents + h->plt.offset + 2);
3010 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
3011 htab->splt->contents + h->plt.offset + 7);
3012 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
3013 htab->splt->contents + h->plt.offset + 12);
3015 /* Fill in the entry in the global offset table. */
3016 bfd_put_32 (output_bfd,
3017 (htab->splt->output_section->vma
3018 + htab->splt->output_offset
3021 htab->sgotplt->contents + got_offset);
3023 /* Fill in the entry in the .rel.plt section. */
3024 rel.r_offset = (htab->sgotplt->output_section->vma
3025 + htab->sgotplt->output_offset
3027 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3028 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
3029 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3031 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3033 /* Mark the symbol as undefined, rather than as defined in
3034 the .plt section. Leave the value if there were any
3035 relocations where pointer equality matters (this is a clue
3036 for the dynamic linker, to make function pointer
3037 comparisons work between an application and shared
3038 library), otherwise set it to zero. If a function is only
3039 called from a binary, there is no need to slow down
3040 shared libraries because of that. */
3041 sym->st_shndx = SHN_UNDEF;
3042 if ((h->elf_link_hash_flags & ELF_LINK_POINTER_EQUALITY_NEEDED) == 0)
3047 if (h->got.offset != (bfd_vma) -1
3048 && elf_i386_hash_entry(h)->tls_type != GOT_TLS_GD
3049 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
3051 Elf_Internal_Rela rel;
3054 /* This symbol has an entry in the global offset table. Set it
3057 if (htab->sgot == NULL || htab->srelgot == NULL)
3060 rel.r_offset = (htab->sgot->output_section->vma
3061 + htab->sgot->output_offset
3062 + (h->got.offset & ~(bfd_vma) 1));
3064 /* If this is a static link, or it is a -Bsymbolic link and the
3065 symbol is defined locally or was forced to be local because
3066 of a version file, we just want to emit a RELATIVE reloc.
3067 The entry in the global offset table will already have been
3068 initialized in the relocate_section function. */
3070 && SYMBOL_REFERENCES_LOCAL (info, h))
3072 BFD_ASSERT((h->got.offset & 1) != 0);
3073 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3077 BFD_ASSERT((h->got.offset & 1) == 0);
3078 bfd_put_32 (output_bfd, (bfd_vma) 0,
3079 htab->sgot->contents + h->got.offset);
3080 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3083 loc = htab->srelgot->contents;
3084 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3085 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3088 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3090 Elf_Internal_Rela rel;
3093 /* This symbol needs a copy reloc. Set it up. */
3095 if (h->dynindx == -1
3096 || (h->root.type != bfd_link_hash_defined
3097 && h->root.type != bfd_link_hash_defweak)
3098 || htab->srelbss == NULL)
3101 rel.r_offset = (h->root.u.def.value
3102 + h->root.u.def.section->output_section->vma
3103 + h->root.u.def.section->output_offset);
3104 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3105 loc = htab->srelbss->contents;
3106 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
3107 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3110 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
3111 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3112 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3113 sym->st_shndx = SHN_ABS;
3118 /* Used to decide how to sort relocs in an optimal manner for the
3119 dynamic linker, before writing them out. */
3121 static enum elf_reloc_type_class
3122 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
3124 switch (ELF32_R_TYPE (rela->r_info))
3126 case R_386_RELATIVE:
3127 return reloc_class_relative;
3128 case R_386_JUMP_SLOT:
3129 return reloc_class_plt;
3131 return reloc_class_copy;
3133 return reloc_class_normal;
3137 /* Finish up the dynamic sections. */
3140 elf_i386_finish_dynamic_sections (bfd *output_bfd,
3141 struct bfd_link_info *info)
3143 struct elf_i386_link_hash_table *htab;
3147 htab = elf_i386_hash_table (info);
3148 dynobj = htab->elf.dynobj;
3149 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3151 if (htab->elf.dynamic_sections_created)
3153 Elf32_External_Dyn *dyncon, *dynconend;
3155 if (sdyn == NULL || htab->sgot == NULL)
3158 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3159 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3160 for (; dyncon < dynconend; dyncon++)
3162 Elf_Internal_Dyn dyn;
3165 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3173 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3178 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3183 dyn.d_un.d_val = s->_raw_size;
3187 /* My reading of the SVR4 ABI indicates that the
3188 procedure linkage table relocs (DT_JMPREL) should be
3189 included in the overall relocs (DT_REL). This is
3190 what Solaris does. However, UnixWare can not handle
3191 that case. Therefore, we override the DT_RELSZ entry
3192 here to make it not include the JMPREL relocs. */
3196 dyn.d_un.d_val -= s->_raw_size;
3200 /* We may not be using the standard ELF linker script.
3201 If .rel.plt is the first .rel section, we adjust
3202 DT_REL to not include it. */
3206 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
3208 dyn.d_un.d_ptr += s->_raw_size;
3212 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3215 /* Fill in the first entry in the procedure linkage table. */
3216 if (htab->splt && htab->splt->_raw_size > 0)
3219 memcpy (htab->splt->contents,
3220 elf_i386_pic_plt0_entry, PLT_ENTRY_SIZE);
3223 memcpy (htab->splt->contents,
3224 elf_i386_plt0_entry, PLT_ENTRY_SIZE);
3225 bfd_put_32 (output_bfd,
3226 (htab->sgotplt->output_section->vma
3227 + htab->sgotplt->output_offset
3229 htab->splt->contents + 2);
3230 bfd_put_32 (output_bfd,
3231 (htab->sgotplt->output_section->vma
3232 + htab->sgotplt->output_offset
3234 htab->splt->contents + 8);
3237 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3238 really seem like the right value. */
3239 elf_section_data (htab->splt->output_section)
3240 ->this_hdr.sh_entsize = 4;
3246 /* Fill in the first three entries in the global offset table. */
3247 if (htab->sgotplt->_raw_size > 0)
3249 bfd_put_32 (output_bfd,
3251 : sdyn->output_section->vma + sdyn->output_offset),
3252 htab->sgotplt->contents);
3253 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
3254 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
3257 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
3262 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3263 #define TARGET_LITTLE_NAME "elf32-i386"
3264 #define ELF_ARCH bfd_arch_i386
3265 #define ELF_MACHINE_CODE EM_386
3266 #define ELF_MAXPAGESIZE 0x1000
3268 #define elf_backend_can_gc_sections 1
3269 #define elf_backend_can_refcount 1
3270 #define elf_backend_want_got_plt 1
3271 #define elf_backend_plt_readonly 1
3272 #define elf_backend_want_plt_sym 0
3273 #define elf_backend_got_header_size 12
3275 /* Support RELA for objdump of prelink objects. */
3276 #define elf_info_to_howto elf_i386_info_to_howto_rel
3277 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3279 #define bfd_elf32_mkobject elf_i386_mkobject
3281 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3282 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3283 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3285 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3286 #define elf_backend_check_relocs elf_i386_check_relocs
3287 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
3288 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
3289 #define elf_backend_fake_sections elf_i386_fake_sections
3290 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3291 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3292 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3293 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
3294 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
3295 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
3296 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
3297 #define elf_backend_relocate_section elf_i386_relocate_section
3298 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
3300 #include "elf32-target.h"
3302 /* FreeBSD support. */
3304 #undef TARGET_LITTLE_SYM
3305 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3306 #undef TARGET_LITTLE_NAME
3307 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3309 /* The kernel recognizes executables as valid only if they carry a
3310 "FreeBSD" label in the ELF header. So we put this label on all
3311 executables and (for simplicity) also all other object files. */
3314 elf_i386_post_process_headers (bfd *abfd,
3315 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3317 Elf_Internal_Ehdr *i_ehdrp;
3319 i_ehdrp = elf_elfheader (abfd);
3321 /* Put an ABI label supported by FreeBSD >= 4.1. */
3322 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
3323 #ifdef OLD_FREEBSD_ABI_LABEL
3324 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3325 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
3329 #undef elf_backend_post_process_headers
3330 #define elf_backend_post_process_headers elf_i386_post_process_headers
3332 #define elf32_bed elf32_i386_fbsd_bed
3334 #include "elf32-target.h"