1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
26 #include "elf-vxworks.h"
28 /* 386 uses REL relocations instead of RELA. */
33 static reloc_howto_type elf_howto_table[]=
35 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
36 bfd_elf_generic_reloc, "R_386_NONE",
37 TRUE, 0x00000000, 0x00000000, FALSE),
38 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
39 bfd_elf_generic_reloc, "R_386_32",
40 TRUE, 0xffffffff, 0xffffffff, FALSE),
41 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
42 bfd_elf_generic_reloc, "R_386_PC32",
43 TRUE, 0xffffffff, 0xffffffff, TRUE),
44 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
45 bfd_elf_generic_reloc, "R_386_GOT32",
46 TRUE, 0xffffffff, 0xffffffff, FALSE),
47 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
48 bfd_elf_generic_reloc, "R_386_PLT32",
49 TRUE, 0xffffffff, 0xffffffff, TRUE),
50 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
51 bfd_elf_generic_reloc, "R_386_COPY",
52 TRUE, 0xffffffff, 0xffffffff, FALSE),
53 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
54 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
55 TRUE, 0xffffffff, 0xffffffff, FALSE),
56 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
57 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
58 TRUE, 0xffffffff, 0xffffffff, FALSE),
59 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_386_RELATIVE",
61 TRUE, 0xffffffff, 0xffffffff, FALSE),
62 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_386_GOTOFF",
64 TRUE, 0xffffffff, 0xffffffff, FALSE),
65 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_386_GOTPC",
67 TRUE, 0xffffffff, 0xffffffff, TRUE),
69 /* We have a gap in the reloc numbers here.
70 R_386_standard counts the number up to this point, and
71 R_386_ext_offset is the value to subtract from a reloc type of
72 R_386_16 thru R_386_PC8 to form an index into this table. */
73 #define R_386_standard (R_386_GOTPC + 1)
74 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
76 /* These relocs are a GNU extension. */
77 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
79 TRUE, 0xffffffff, 0xffffffff, FALSE),
80 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_386_TLS_IE",
82 TRUE, 0xffffffff, 0xffffffff, FALSE),
83 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
85 TRUE, 0xffffffff, 0xffffffff, FALSE),
86 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_386_TLS_LE",
88 TRUE, 0xffffffff, 0xffffffff, FALSE),
89 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_386_TLS_GD",
91 TRUE, 0xffffffff, 0xffffffff, FALSE),
92 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_386_TLS_LDM",
94 TRUE, 0xffffffff, 0xffffffff, FALSE),
95 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_386_16",
97 TRUE, 0xffff, 0xffff, FALSE),
98 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_386_PC16",
100 TRUE, 0xffff, 0xffff, TRUE),
101 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_386_8",
103 TRUE, 0xff, 0xff, FALSE),
104 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
105 bfd_elf_generic_reloc, "R_386_PC8",
106 TRUE, 0xff, 0xff, TRUE),
108 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
109 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
110 /* These are common with Solaris TLS implementation. */
111 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
113 TRUE, 0xffffffff, 0xffffffff, FALSE),
114 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
116 TRUE, 0xffffffff, 0xffffffff, FALSE),
117 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
119 TRUE, 0xffffffff, 0xffffffff, FALSE),
120 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
122 TRUE, 0xffffffff, 0xffffffff, FALSE),
123 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
125 TRUE, 0xffffffff, 0xffffffff, FALSE),
126 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
128 TRUE, 0xffffffff, 0xffffffff, FALSE),
130 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
132 TRUE, 0xffffffff, 0xffffffff, FALSE),
133 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
136 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_386_TLS_DESC",
138 TRUE, 0xffffffff, 0xffffffff, FALSE),
141 #define R_386_tls (R_386_TLS_DESC + 1 - R_386_tls_offset)
142 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
144 /* GNU extension to record C++ vtable hierarchy. */
145 HOWTO (R_386_GNU_VTINHERIT, /* type */
147 2, /* size (0 = byte, 1 = short, 2 = long) */
149 FALSE, /* pc_relative */
151 complain_overflow_dont, /* complain_on_overflow */
152 NULL, /* special_function */
153 "R_386_GNU_VTINHERIT", /* name */
154 FALSE, /* partial_inplace */
157 FALSE), /* pcrel_offset */
159 /* GNU extension to record C++ vtable member usage. */
160 HOWTO (R_386_GNU_VTENTRY, /* type */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
164 FALSE, /* pc_relative */
166 complain_overflow_dont, /* complain_on_overflow */
167 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
168 "R_386_GNU_VTENTRY", /* name */
169 FALSE, /* partial_inplace */
172 FALSE) /* pcrel_offset */
174 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
178 #ifdef DEBUG_GEN_RELOC
180 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
185 static reloc_howto_type *
186 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
187 bfd_reloc_code_real_type code)
192 TRACE ("BFD_RELOC_NONE");
193 return &elf_howto_table[R_386_NONE];
196 TRACE ("BFD_RELOC_32");
197 return &elf_howto_table[R_386_32];
200 TRACE ("BFD_RELOC_CTOR");
201 return &elf_howto_table[R_386_32];
203 case BFD_RELOC_32_PCREL:
204 TRACE ("BFD_RELOC_PC32");
205 return &elf_howto_table[R_386_PC32];
207 case BFD_RELOC_386_GOT32:
208 TRACE ("BFD_RELOC_386_GOT32");
209 return &elf_howto_table[R_386_GOT32];
211 case BFD_RELOC_386_PLT32:
212 TRACE ("BFD_RELOC_386_PLT32");
213 return &elf_howto_table[R_386_PLT32];
215 case BFD_RELOC_386_COPY:
216 TRACE ("BFD_RELOC_386_COPY");
217 return &elf_howto_table[R_386_COPY];
219 case BFD_RELOC_386_GLOB_DAT:
220 TRACE ("BFD_RELOC_386_GLOB_DAT");
221 return &elf_howto_table[R_386_GLOB_DAT];
223 case BFD_RELOC_386_JUMP_SLOT:
224 TRACE ("BFD_RELOC_386_JUMP_SLOT");
225 return &elf_howto_table[R_386_JUMP_SLOT];
227 case BFD_RELOC_386_RELATIVE:
228 TRACE ("BFD_RELOC_386_RELATIVE");
229 return &elf_howto_table[R_386_RELATIVE];
231 case BFD_RELOC_386_GOTOFF:
232 TRACE ("BFD_RELOC_386_GOTOFF");
233 return &elf_howto_table[R_386_GOTOFF];
235 case BFD_RELOC_386_GOTPC:
236 TRACE ("BFD_RELOC_386_GOTPC");
237 return &elf_howto_table[R_386_GOTPC];
239 /* These relocs are a GNU extension. */
240 case BFD_RELOC_386_TLS_TPOFF:
241 TRACE ("BFD_RELOC_386_TLS_TPOFF");
242 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
244 case BFD_RELOC_386_TLS_IE:
245 TRACE ("BFD_RELOC_386_TLS_IE");
246 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
248 case BFD_RELOC_386_TLS_GOTIE:
249 TRACE ("BFD_RELOC_386_TLS_GOTIE");
250 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
252 case BFD_RELOC_386_TLS_LE:
253 TRACE ("BFD_RELOC_386_TLS_LE");
254 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
256 case BFD_RELOC_386_TLS_GD:
257 TRACE ("BFD_RELOC_386_TLS_GD");
258 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
260 case BFD_RELOC_386_TLS_LDM:
261 TRACE ("BFD_RELOC_386_TLS_LDM");
262 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
265 TRACE ("BFD_RELOC_16");
266 return &elf_howto_table[R_386_16 - R_386_ext_offset];
268 case BFD_RELOC_16_PCREL:
269 TRACE ("BFD_RELOC_16_PCREL");
270 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
273 TRACE ("BFD_RELOC_8");
274 return &elf_howto_table[R_386_8 - R_386_ext_offset];
276 case BFD_RELOC_8_PCREL:
277 TRACE ("BFD_RELOC_8_PCREL");
278 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
280 /* Common with Sun TLS implementation. */
281 case BFD_RELOC_386_TLS_LDO_32:
282 TRACE ("BFD_RELOC_386_TLS_LDO_32");
283 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
285 case BFD_RELOC_386_TLS_IE_32:
286 TRACE ("BFD_RELOC_386_TLS_IE_32");
287 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
289 case BFD_RELOC_386_TLS_LE_32:
290 TRACE ("BFD_RELOC_386_TLS_LE_32");
291 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
293 case BFD_RELOC_386_TLS_DTPMOD32:
294 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
295 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
297 case BFD_RELOC_386_TLS_DTPOFF32:
298 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
299 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
301 case BFD_RELOC_386_TLS_TPOFF32:
302 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
303 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
305 case BFD_RELOC_386_TLS_GOTDESC:
306 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
307 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
309 case BFD_RELOC_386_TLS_DESC_CALL:
310 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
311 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
313 case BFD_RELOC_386_TLS_DESC:
314 TRACE ("BFD_RELOC_386_TLS_DESC");
315 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
317 case BFD_RELOC_VTABLE_INHERIT:
318 TRACE ("BFD_RELOC_VTABLE_INHERIT");
319 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
321 case BFD_RELOC_VTABLE_ENTRY:
322 TRACE ("BFD_RELOC_VTABLE_ENTRY");
323 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
334 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
336 Elf_Internal_Rela *dst)
338 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
341 if ((indx = r_type) >= R_386_standard
342 && ((indx = r_type - R_386_ext_offset) - R_386_standard
343 >= R_386_ext - R_386_standard)
344 && ((indx = r_type - R_386_tls_offset) - R_386_ext
345 >= R_386_tls - R_386_ext)
346 && ((indx = r_type - R_386_vt_offset) - R_386_tls
347 >= R_386_vt - R_386_tls))
349 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
353 cache_ptr->howto = &elf_howto_table[indx];
356 /* Return whether a symbol name implies a local label. The UnixWare
357 2.1 cc generates temporary symbols that start with .X, so we
358 recognize them here. FIXME: do other SVR4 compilers also use .X?.
359 If so, we should move the .X recognition into
360 _bfd_elf_is_local_label_name. */
363 elf_i386_is_local_label_name (bfd *abfd, const char *name)
365 if (name[0] == '.' && name[1] == 'X')
368 return _bfd_elf_is_local_label_name (abfd, name);
371 /* Support for core dump NOTE sections. */
374 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
379 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
381 int pr_version = bfd_get_32 (abfd, note->descdata);
387 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
390 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
394 size = bfd_get_32 (abfd, note->descdata + 8);
398 switch (note->descsz)
403 case 144: /* Linux/i386 */
405 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
408 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
418 /* Make a ".reg/999" section. */
419 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
420 size, note->descpos + offset);
424 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
426 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
428 int pr_version = bfd_get_32 (abfd, note->descdata);
433 elf_tdata (abfd)->core_program
434 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
435 elf_tdata (abfd)->core_command
436 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
440 switch (note->descsz)
445 case 124: /* Linux/i386 elf_prpsinfo. */
446 elf_tdata (abfd)->core_program
447 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
448 elf_tdata (abfd)->core_command
449 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
453 /* Note that for some reason, a spurious space is tacked
454 onto the end of the args in some (at least one anyway)
455 implementations, so strip it off if it exists. */
457 char *command = elf_tdata (abfd)->core_command;
458 int n = strlen (command);
460 if (0 < n && command[n - 1] == ' ')
461 command[n - 1] = '\0';
467 /* Functions for the i386 ELF linker.
469 In order to gain some understanding of code in this file without
470 knowing all the intricate details of the linker, note the
473 Functions named elf_i386_* are called by external routines, other
474 functions are only called locally. elf_i386_* functions appear
475 in this file more or less in the order in which they are called
476 from external routines. eg. elf_i386_check_relocs is called
477 early in the link process, elf_i386_finish_dynamic_sections is
478 one of the last functions. */
481 /* The name of the dynamic interpreter. This is put in the .interp
484 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
486 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
487 copying dynamic variables from a shared lib into an app's dynbss
488 section, and instead use a dynamic relocation to point into the
490 #define ELIMINATE_COPY_RELOCS 1
492 /* The size in bytes of an entry in the procedure linkage table. */
494 #define PLT_ENTRY_SIZE 16
496 /* The first entry in an absolute procedure linkage table looks like
497 this. See the SVR4 ABI i386 supplement to see how this works.
498 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
500 static const bfd_byte elf_i386_plt0_entry[12] =
502 0xff, 0x35, /* pushl contents of address */
503 0, 0, 0, 0, /* replaced with address of .got + 4. */
504 0xff, 0x25, /* jmp indirect */
505 0, 0, 0, 0 /* replaced with address of .got + 8. */
508 /* Subsequent entries in an absolute procedure linkage table look like
511 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
513 0xff, 0x25, /* jmp indirect */
514 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
515 0x68, /* pushl immediate */
516 0, 0, 0, 0, /* replaced with offset into relocation table. */
517 0xe9, /* jmp relative */
518 0, 0, 0, 0 /* replaced with offset to start of .plt. */
521 /* The first entry in a PIC procedure linkage table look like this.
522 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
524 static const bfd_byte elf_i386_pic_plt0_entry[12] =
526 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
527 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
530 /* Subsequent entries in a PIC procedure linkage table look like this. */
532 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
534 0xff, 0xa3, /* jmp *offset(%ebx) */
535 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
536 0x68, /* pushl immediate */
537 0, 0, 0, 0, /* replaced with offset into relocation table. */
538 0xe9, /* jmp relative */
539 0, 0, 0, 0 /* replaced with offset to start of .plt. */
542 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
543 for the PLTResolve stub and then for each PLT entry. */
544 #define PLTRESOLVE_RELOCS_SHLIB 0
545 #define PLTRESOLVE_RELOCS 2
546 #define PLT_NON_JUMP_SLOT_RELOCS 2
548 /* The i386 linker needs to keep track of the number of relocs that it
549 decides to copy as dynamic relocs in check_relocs for each symbol.
550 This is so that it can later discard them if they are found to be
551 unnecessary. We store the information in a field extending the
552 regular ELF linker hash table. */
554 struct elf_i386_dyn_relocs
556 struct elf_i386_dyn_relocs *next;
558 /* The input section of the reloc. */
561 /* Total number of relocs copied for the input section. */
564 /* Number of pc-relative relocs copied for the input section. */
565 bfd_size_type pc_count;
568 /* i386 ELF linker hash entry. */
570 struct elf_i386_link_hash_entry
572 struct elf_link_hash_entry elf;
574 /* Track dynamic relocs copied for this symbol. */
575 struct elf_i386_dyn_relocs *dyn_relocs;
577 #define GOT_UNKNOWN 0
581 #define GOT_TLS_IE_POS 5
582 #define GOT_TLS_IE_NEG 6
583 #define GOT_TLS_IE_BOTH 7
584 #define GOT_TLS_GDESC 8
585 #define GOT_TLS_GD_BOTH_P(type) \
586 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
587 #define GOT_TLS_GD_P(type) \
588 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
589 #define GOT_TLS_GDESC_P(type) \
590 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
591 #define GOT_TLS_GD_ANY_P(type) \
592 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
593 unsigned char tls_type;
595 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
596 starting at the end of the jump table. */
600 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
602 struct elf_i386_obj_tdata
604 struct elf_obj_tdata root;
606 /* tls_type for each local got entry. */
607 char *local_got_tls_type;
609 /* GOTPLT entries for TLS descriptors. */
610 bfd_vma *local_tlsdesc_gotent;
613 #define elf_i386_tdata(abfd) \
614 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
616 #define elf_i386_local_got_tls_type(abfd) \
617 (elf_i386_tdata (abfd)->local_got_tls_type)
619 #define elf_i386_local_tlsdesc_gotent(abfd) \
620 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
623 elf_i386_mkobject (bfd *abfd)
625 if (abfd->tdata.any == NULL)
627 bfd_size_type amt = sizeof (struct elf_i386_obj_tdata);
628 abfd->tdata.any = bfd_zalloc (abfd, amt);
629 if (abfd->tdata.any == NULL)
632 return bfd_elf_mkobject (abfd);
635 /* i386 ELF linker hash table. */
637 struct elf_i386_link_hash_table
639 struct elf_link_hash_table elf;
641 /* Short-cuts to get to dynamic linker sections. */
650 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
653 /* True if the target system is VxWorks. */
656 /* Value used to fill the last word of the first plt entry. */
657 bfd_byte plt0_pad_byte;
659 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
660 bfd_vma next_tls_desc_index;
663 bfd_signed_vma refcount;
667 /* The amount of space used by the reserved portion of the sgotplt
668 section, plus whatever space is used by the jump slots. */
669 bfd_vma sgotplt_jump_table_size;
671 /* Small local sym to section mapping cache. */
672 struct sym_sec_cache sym_sec;
675 /* Get the i386 ELF linker hash table from a link_info structure. */
677 #define elf_i386_hash_table(p) \
678 ((struct elf_i386_link_hash_table *) ((p)->hash))
680 #define elf_i386_compute_jump_table_size(htab) \
681 ((htab)->next_tls_desc_index * 4)
683 /* Create an entry in an i386 ELF linker hash table. */
685 static struct bfd_hash_entry *
686 link_hash_newfunc (struct bfd_hash_entry *entry,
687 struct bfd_hash_table *table,
690 /* Allocate the structure if it has not already been allocated by a
694 entry = bfd_hash_allocate (table,
695 sizeof (struct elf_i386_link_hash_entry));
700 /* Call the allocation method of the superclass. */
701 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
704 struct elf_i386_link_hash_entry *eh;
706 eh = (struct elf_i386_link_hash_entry *) entry;
707 eh->dyn_relocs = NULL;
708 eh->tls_type = GOT_UNKNOWN;
709 eh->tlsdesc_got = (bfd_vma) -1;
715 /* Create an i386 ELF linker hash table. */
717 static struct bfd_link_hash_table *
718 elf_i386_link_hash_table_create (bfd *abfd)
720 struct elf_i386_link_hash_table *ret;
721 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
723 ret = bfd_malloc (amt);
727 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
728 sizeof (struct elf_i386_link_hash_entry)))
741 ret->tls_ldm_got.refcount = 0;
742 ret->next_tls_desc_index = 0;
743 ret->sgotplt_jump_table_size = 0;
744 ret->sym_sec.abfd = NULL;
746 ret->srelplt2 = NULL;
747 ret->plt0_pad_byte = 0;
749 return &ret->elf.root;
752 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
753 shortcuts to them in our hash table. */
756 create_got_section (bfd *dynobj, struct bfd_link_info *info)
758 struct elf_i386_link_hash_table *htab;
760 if (! _bfd_elf_create_got_section (dynobj, info))
763 htab = elf_i386_hash_table (info);
764 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
765 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
766 if (!htab->sgot || !htab->sgotplt)
769 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got",
770 (SEC_ALLOC | SEC_LOAD
775 if (htab->srelgot == NULL
776 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
781 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
782 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
786 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
788 struct elf_i386_link_hash_table *htab;
790 htab = elf_i386_hash_table (info);
791 if (!htab->sgot && !create_got_section (dynobj, info))
794 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
797 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
798 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
799 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
801 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
803 if (!htab->splt || !htab->srelplt || !htab->sdynbss
804 || (!info->shared && !htab->srelbss))
808 && !elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
814 /* Copy the extra info we tack onto an elf_link_hash_entry. */
817 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
818 struct elf_link_hash_entry *dir,
819 struct elf_link_hash_entry *ind)
821 struct elf_i386_link_hash_entry *edir, *eind;
823 edir = (struct elf_i386_link_hash_entry *) dir;
824 eind = (struct elf_i386_link_hash_entry *) ind;
826 if (eind->dyn_relocs != NULL)
828 if (edir->dyn_relocs != NULL)
830 struct elf_i386_dyn_relocs **pp;
831 struct elf_i386_dyn_relocs *p;
833 /* Add reloc counts against the indirect sym to the direct sym
834 list. Merge any entries against the same section. */
835 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
837 struct elf_i386_dyn_relocs *q;
839 for (q = edir->dyn_relocs; q != NULL; q = q->next)
840 if (q->sec == p->sec)
842 q->pc_count += p->pc_count;
843 q->count += p->count;
850 *pp = edir->dyn_relocs;
853 edir->dyn_relocs = eind->dyn_relocs;
854 eind->dyn_relocs = NULL;
857 if (ind->root.type == bfd_link_hash_indirect
858 && dir->got.refcount <= 0)
860 edir->tls_type = eind->tls_type;
861 eind->tls_type = GOT_UNKNOWN;
864 if (ELIMINATE_COPY_RELOCS
865 && ind->root.type != bfd_link_hash_indirect
866 && dir->dynamic_adjusted)
868 /* If called to transfer flags for a weakdef during processing
869 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
870 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
871 dir->ref_dynamic |= ind->ref_dynamic;
872 dir->ref_regular |= ind->ref_regular;
873 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
874 dir->needs_plt |= ind->needs_plt;
875 dir->pointer_equality_needed |= ind->pointer_equality_needed;
878 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
882 elf_i386_tls_transition (struct bfd_link_info *info, int r_type, int is_local)
890 case R_386_TLS_GOTDESC:
891 case R_386_TLS_DESC_CALL:
892 case R_386_TLS_IE_32:
894 return R_386_TLS_LE_32;
895 return R_386_TLS_IE_32;
897 case R_386_TLS_GOTIE:
899 return R_386_TLS_LE_32;
902 return R_386_TLS_LE_32;
908 /* Look through the relocs for a section during the first phase, and
909 calculate needed space in the global offset table, procedure linkage
910 table, and dynamic reloc sections. */
913 elf_i386_check_relocs (bfd *abfd,
914 struct bfd_link_info *info,
916 const Elf_Internal_Rela *relocs)
918 struct elf_i386_link_hash_table *htab;
919 Elf_Internal_Shdr *symtab_hdr;
920 struct elf_link_hash_entry **sym_hashes;
921 const Elf_Internal_Rela *rel;
922 const Elf_Internal_Rela *rel_end;
925 if (info->relocatable)
928 htab = elf_i386_hash_table (info);
929 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
930 sym_hashes = elf_sym_hashes (abfd);
934 rel_end = relocs + sec->reloc_count;
935 for (rel = relocs; rel < rel_end; rel++)
938 unsigned long r_symndx;
939 struct elf_link_hash_entry *h;
941 r_symndx = ELF32_R_SYM (rel->r_info);
942 r_type = ELF32_R_TYPE (rel->r_info);
944 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
946 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
952 if (r_symndx < symtab_hdr->sh_info)
956 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
957 while (h->root.type == bfd_link_hash_indirect
958 || h->root.type == bfd_link_hash_warning)
959 h = (struct elf_link_hash_entry *) h->root.u.i.link;
962 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
967 htab->tls_ldm_got.refcount += 1;
971 /* This symbol requires a procedure linkage table entry. We
972 actually build the entry in adjust_dynamic_symbol,
973 because this might be a case of linking PIC code which is
974 never referenced by a dynamic object, in which case we
975 don't need to generate a procedure linkage table entry
978 /* If this is a local symbol, we resolve it directly without
979 creating a procedure linkage table entry. */
984 h->plt.refcount += 1;
987 case R_386_TLS_IE_32:
989 case R_386_TLS_GOTIE:
991 info->flags |= DF_STATIC_TLS;
996 case R_386_TLS_GOTDESC:
997 case R_386_TLS_DESC_CALL:
998 /* This symbol requires a global offset table entry. */
1000 int tls_type, old_tls_type;
1005 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1006 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1007 case R_386_TLS_GOTDESC:
1008 case R_386_TLS_DESC_CALL:
1009 tls_type = GOT_TLS_GDESC; break;
1010 case R_386_TLS_IE_32:
1011 if (ELF32_R_TYPE (rel->r_info) == r_type)
1012 tls_type = GOT_TLS_IE_NEG;
1014 /* If this is a GD->IE transition, we may use either of
1015 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1016 tls_type = GOT_TLS_IE;
1019 case R_386_TLS_GOTIE:
1020 tls_type = GOT_TLS_IE_POS; break;
1025 h->got.refcount += 1;
1026 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1030 bfd_signed_vma *local_got_refcounts;
1032 /* This is a global offset table entry for a local symbol. */
1033 local_got_refcounts = elf_local_got_refcounts (abfd);
1034 if (local_got_refcounts == NULL)
1038 size = symtab_hdr->sh_info;
1039 size *= (sizeof (bfd_signed_vma)
1040 + sizeof (bfd_vma) + sizeof(char));
1041 local_got_refcounts = bfd_zalloc (abfd, size);
1042 if (local_got_refcounts == NULL)
1044 elf_local_got_refcounts (abfd) = local_got_refcounts;
1045 elf_i386_local_tlsdesc_gotent (abfd)
1046 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1047 elf_i386_local_got_tls_type (abfd)
1048 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1050 local_got_refcounts[r_symndx] += 1;
1051 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1054 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1055 tls_type |= old_tls_type;
1056 /* If a TLS symbol is accessed using IE at least once,
1057 there is no point to use dynamic model for it. */
1058 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1059 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1060 || (tls_type & GOT_TLS_IE) == 0))
1062 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1063 tls_type = old_tls_type;
1064 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1065 && GOT_TLS_GD_ANY_P (tls_type))
1066 tls_type |= old_tls_type;
1069 (*_bfd_error_handler)
1070 (_("%B: `%s' accessed both as normal and "
1071 "thread local symbol"),
1073 h ? h->root.root.string : "<local>");
1078 if (old_tls_type != tls_type)
1081 elf_i386_hash_entry (h)->tls_type = tls_type;
1083 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1091 if (htab->sgot == NULL)
1093 if (htab->elf.dynobj == NULL)
1094 htab->elf.dynobj = abfd;
1095 if (!create_got_section (htab->elf.dynobj, info))
1098 if (r_type != R_386_TLS_IE)
1102 case R_386_TLS_LE_32:
1106 info->flags |= DF_STATIC_TLS;
1111 if (h != NULL && !info->shared)
1113 /* If this reloc is in a read-only section, we might
1114 need a copy reloc. We can't check reliably at this
1115 stage whether the section is read-only, as input
1116 sections have not yet been mapped to output sections.
1117 Tentatively set the flag for now, and correct in
1118 adjust_dynamic_symbol. */
1121 /* We may need a .plt entry if the function this reloc
1122 refers to is in a shared lib. */
1123 h->plt.refcount += 1;
1124 if (r_type != R_386_PC32)
1125 h->pointer_equality_needed = 1;
1128 /* If we are creating a shared library, and this is a reloc
1129 against a global symbol, or a non PC relative reloc
1130 against a local symbol, then we need to copy the reloc
1131 into the shared library. However, if we are linking with
1132 -Bsymbolic, we do not need to copy a reloc against a
1133 global symbol which is defined in an object we are
1134 including in the link (i.e., DEF_REGULAR is set). At
1135 this point we have not seen all the input files, so it is
1136 possible that DEF_REGULAR is not set now but will be set
1137 later (it is never cleared). In case of a weak definition,
1138 DEF_REGULAR may be cleared later by a strong definition in
1139 a shared library. We account for that possibility below by
1140 storing information in the relocs_copied field of the hash
1141 table entry. A similar situation occurs when creating
1142 shared libraries and symbol visibility changes render the
1145 If on the other hand, we are creating an executable, we
1146 may need to keep relocations for symbols satisfied by a
1147 dynamic library if we manage to avoid copy relocs for the
1150 && (sec->flags & SEC_ALLOC) != 0
1151 && (r_type != R_386_PC32
1153 && (! SYMBOLIC_BIND (info, h)
1154 || h->root.type == bfd_link_hash_defweak
1155 || !h->def_regular))))
1156 || (ELIMINATE_COPY_RELOCS
1158 && (sec->flags & SEC_ALLOC) != 0
1160 && (h->root.type == bfd_link_hash_defweak
1161 || !h->def_regular)))
1163 struct elf_i386_dyn_relocs *p;
1164 struct elf_i386_dyn_relocs **head;
1166 /* We must copy these reloc types into the output file.
1167 Create a reloc section in dynobj and make room for
1173 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1174 unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
1176 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
1180 if (! CONST_STRNEQ (name, ".rel")
1181 || strcmp (bfd_get_section_name (abfd, sec),
1184 (*_bfd_error_handler)
1185 (_("%B: bad relocation section name `%s\'"),
1189 if (htab->elf.dynobj == NULL)
1190 htab->elf.dynobj = abfd;
1192 dynobj = htab->elf.dynobj;
1193 sreloc = bfd_get_section_by_name (dynobj, name);
1198 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1199 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1200 if ((sec->flags & SEC_ALLOC) != 0)
1201 flags |= SEC_ALLOC | SEC_LOAD;
1202 sreloc = bfd_make_section_with_flags (dynobj,
1206 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1209 elf_section_data (sec)->sreloc = sreloc;
1212 /* If this is a global symbol, we count the number of
1213 relocations we need for this symbol. */
1216 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1221 /* Track dynamic relocs needed for local syms too.
1222 We really need local syms available to do this
1226 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1231 vpp = &elf_section_data (s)->local_dynrel;
1232 head = (struct elf_i386_dyn_relocs **)vpp;
1236 if (p == NULL || p->sec != sec)
1238 bfd_size_type amt = sizeof *p;
1239 p = bfd_alloc (htab->elf.dynobj, amt);
1250 if (r_type == R_386_PC32)
1255 /* This relocation describes the C++ object vtable hierarchy.
1256 Reconstruct it for later use during GC. */
1257 case R_386_GNU_VTINHERIT:
1258 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1262 /* This relocation describes which C++ vtable entries are actually
1263 used. Record for later use during GC. */
1264 case R_386_GNU_VTENTRY:
1265 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1277 /* Return the section that should be marked against GC for a given
1281 elf_i386_gc_mark_hook (asection *sec,
1282 struct bfd_link_info *info,
1283 Elf_Internal_Rela *rel,
1284 struct elf_link_hash_entry *h,
1285 Elf_Internal_Sym *sym)
1288 switch (ELF32_R_TYPE (rel->r_info))
1290 case R_386_GNU_VTINHERIT:
1291 case R_386_GNU_VTENTRY:
1295 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1298 /* Update the got entry reference counts for the section being removed. */
1301 elf_i386_gc_sweep_hook (bfd *abfd,
1302 struct bfd_link_info *info,
1304 const Elf_Internal_Rela *relocs)
1306 Elf_Internal_Shdr *symtab_hdr;
1307 struct elf_link_hash_entry **sym_hashes;
1308 bfd_signed_vma *local_got_refcounts;
1309 const Elf_Internal_Rela *rel, *relend;
1311 elf_section_data (sec)->local_dynrel = NULL;
1313 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1314 sym_hashes = elf_sym_hashes (abfd);
1315 local_got_refcounts = elf_local_got_refcounts (abfd);
1317 relend = relocs + sec->reloc_count;
1318 for (rel = relocs; rel < relend; rel++)
1320 unsigned long r_symndx;
1321 unsigned int r_type;
1322 struct elf_link_hash_entry *h = NULL;
1324 r_symndx = ELF32_R_SYM (rel->r_info);
1325 if (r_symndx >= symtab_hdr->sh_info)
1327 struct elf_i386_link_hash_entry *eh;
1328 struct elf_i386_dyn_relocs **pp;
1329 struct elf_i386_dyn_relocs *p;
1331 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1332 while (h->root.type == bfd_link_hash_indirect
1333 || h->root.type == bfd_link_hash_warning)
1334 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1335 eh = (struct elf_i386_link_hash_entry *) h;
1337 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1340 /* Everything must go for SEC. */
1346 r_type = ELF32_R_TYPE (rel->r_info);
1347 r_type = elf_i386_tls_transition (info, r_type, h != NULL);
1351 if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1352 elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1356 case R_386_TLS_GOTDESC:
1357 case R_386_TLS_DESC_CALL:
1358 case R_386_TLS_IE_32:
1360 case R_386_TLS_GOTIE:
1364 if (h->got.refcount > 0)
1365 h->got.refcount -= 1;
1367 else if (local_got_refcounts != NULL)
1369 if (local_got_refcounts[r_symndx] > 0)
1370 local_got_refcounts[r_symndx] -= 1;
1383 if (h->plt.refcount > 0)
1384 h->plt.refcount -= 1;
1396 /* Adjust a symbol defined by a dynamic object and referenced by a
1397 regular object. The current definition is in some section of the
1398 dynamic object, but we're not including those sections. We have to
1399 change the definition to something the rest of the link can
1403 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1404 struct elf_link_hash_entry *h)
1406 struct elf_i386_link_hash_table *htab;
1408 unsigned int power_of_two;
1410 /* If this is a function, put it in the procedure linkage table. We
1411 will fill in the contents of the procedure linkage table later,
1412 when we know the address of the .got section. */
1413 if (h->type == STT_FUNC
1416 if (h->plt.refcount <= 0
1417 || SYMBOL_CALLS_LOCAL (info, h)
1418 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1419 && h->root.type == bfd_link_hash_undefweak))
1421 /* This case can occur if we saw a PLT32 reloc in an input
1422 file, but the symbol was never referred to by a dynamic
1423 object, or if all references were garbage collected. In
1424 such a case, we don't actually need to build a procedure
1425 linkage table, and we can just do a PC32 reloc instead. */
1426 h->plt.offset = (bfd_vma) -1;
1433 /* It's possible that we incorrectly decided a .plt reloc was
1434 needed for an R_386_PC32 reloc to a non-function sym in
1435 check_relocs. We can't decide accurately between function and
1436 non-function syms in check-relocs; Objects loaded later in
1437 the link may change h->type. So fix it now. */
1438 h->plt.offset = (bfd_vma) -1;
1440 /* If this is a weak symbol, and there is a real definition, the
1441 processor independent code will have arranged for us to see the
1442 real definition first, and we can just use the same value. */
1443 if (h->u.weakdef != NULL)
1445 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1446 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1447 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1448 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1449 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1450 h->non_got_ref = h->u.weakdef->non_got_ref;
1454 /* This is a reference to a symbol defined by a dynamic object which
1455 is not a function. */
1457 /* If we are creating a shared library, we must presume that the
1458 only references to the symbol are via the global offset table.
1459 For such cases we need not do anything here; the relocations will
1460 be handled correctly by relocate_section. */
1464 /* If there are no references to this symbol that do not use the
1465 GOT, we don't need to generate a copy reloc. */
1466 if (!h->non_got_ref)
1469 /* If -z nocopyreloc was given, we won't generate them either. */
1470 if (info->nocopyreloc)
1476 htab = elf_i386_hash_table (info);
1478 /* If there aren't any dynamic relocs in read-only sections, then
1479 we can keep the dynamic relocs and avoid the copy reloc. This
1480 doesn't work on VxWorks, where we can not have dynamic relocations
1481 (other than copy and jump slot relocations) in an executable. */
1482 if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
1484 struct elf_i386_link_hash_entry * eh;
1485 struct elf_i386_dyn_relocs *p;
1487 eh = (struct elf_i386_link_hash_entry *) h;
1488 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1490 s = p->sec->output_section;
1491 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1504 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1505 h->root.root.string);
1509 /* We must allocate the symbol in our .dynbss section, which will
1510 become part of the .bss section of the executable. There will be
1511 an entry for this symbol in the .dynsym section. The dynamic
1512 object will contain position independent code, so all references
1513 from the dynamic object to this symbol will go through the global
1514 offset table. The dynamic linker will use the .dynsym entry to
1515 determine the address it must put in the global offset table, so
1516 both the dynamic object and the regular object will refer to the
1517 same memory location for the variable. */
1519 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1520 copy the initial value out of the dynamic object and into the
1521 runtime process image. */
1522 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1524 htab->srelbss->size += sizeof (Elf32_External_Rel);
1528 /* We need to figure out the alignment required for this symbol. I
1529 have no idea how ELF linkers handle this. */
1530 power_of_two = bfd_log2 (h->size);
1531 if (power_of_two > 3)
1534 /* Apply the required alignment. */
1536 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1537 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1539 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1543 /* Define the symbol as being at this point in the section. */
1544 h->root.u.def.section = s;
1545 h->root.u.def.value = s->size;
1547 /* Increment the section size to make room for the symbol. */
1553 /* Allocate space in .plt, .got and associated reloc sections for
1557 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1559 struct bfd_link_info *info;
1560 struct elf_i386_link_hash_table *htab;
1561 struct elf_i386_link_hash_entry *eh;
1562 struct elf_i386_dyn_relocs *p;
1564 if (h->root.type == bfd_link_hash_indirect)
1567 if (h->root.type == bfd_link_hash_warning)
1568 /* When warning symbols are created, they **replace** the "real"
1569 entry in the hash table, thus we never get to see the real
1570 symbol in a hash traversal. So look at it now. */
1571 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1573 info = (struct bfd_link_info *) inf;
1574 htab = elf_i386_hash_table (info);
1576 if (htab->elf.dynamic_sections_created
1577 && h->plt.refcount > 0)
1579 /* Make sure this symbol is output as a dynamic symbol.
1580 Undefined weak syms won't yet be marked as dynamic. */
1581 if (h->dynindx == -1
1582 && !h->forced_local)
1584 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1589 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1591 asection *s = htab->splt;
1593 /* If this is the first .plt entry, make room for the special
1596 s->size += PLT_ENTRY_SIZE;
1598 h->plt.offset = s->size;
1600 /* If this symbol is not defined in a regular file, and we are
1601 not generating a shared library, then set the symbol to this
1602 location in the .plt. This is required to make function
1603 pointers compare as equal between the normal executable and
1604 the shared library. */
1608 h->root.u.def.section = s;
1609 h->root.u.def.value = h->plt.offset;
1612 /* Make room for this entry. */
1613 s->size += PLT_ENTRY_SIZE;
1615 /* We also need to make an entry in the .got.plt section, which
1616 will be placed in the .got section by the linker script. */
1617 htab->sgotplt->size += 4;
1619 /* We also need to make an entry in the .rel.plt section. */
1620 htab->srelplt->size += sizeof (Elf32_External_Rel);
1621 htab->next_tls_desc_index++;
1623 if (htab->is_vxworks && !info->shared)
1625 /* VxWorks has a second set of relocations for each PLT entry
1626 in executables. They go in a separate relocation section,
1627 which is processed by the kernel loader. */
1629 /* There are two relocations for the initial PLT entry: an
1630 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1631 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1633 if (h->plt.offset == PLT_ENTRY_SIZE)
1634 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1636 /* There are two extra relocations for each subsequent PLT entry:
1637 an R_386_32 relocation for the GOT entry, and an R_386_32
1638 relocation for the PLT entry. */
1640 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1645 h->plt.offset = (bfd_vma) -1;
1651 h->plt.offset = (bfd_vma) -1;
1655 eh = (struct elf_i386_link_hash_entry *) h;
1656 eh->tlsdesc_got = (bfd_vma) -1;
1658 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1659 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1660 if (h->got.refcount > 0
1663 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
1664 h->got.offset = (bfd_vma) -1;
1665 else if (h->got.refcount > 0)
1669 int tls_type = elf_i386_hash_entry(h)->tls_type;
1671 /* Make sure this symbol is output as a dynamic symbol.
1672 Undefined weak syms won't yet be marked as dynamic. */
1673 if (h->dynindx == -1
1674 && !h->forced_local)
1676 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1681 if (GOT_TLS_GDESC_P (tls_type))
1683 eh->tlsdesc_got = htab->sgotplt->size
1684 - elf_i386_compute_jump_table_size (htab);
1685 htab->sgotplt->size += 8;
1686 h->got.offset = (bfd_vma) -2;
1688 if (! GOT_TLS_GDESC_P (tls_type)
1689 || GOT_TLS_GD_P (tls_type))
1691 h->got.offset = s->size;
1693 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1694 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
1697 dyn = htab->elf.dynamic_sections_created;
1698 /* R_386_TLS_IE_32 needs one dynamic relocation,
1699 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1700 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1701 need two), R_386_TLS_GD needs one if local symbol and two if
1703 if (tls_type == GOT_TLS_IE_BOTH)
1704 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
1705 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
1706 || (tls_type & GOT_TLS_IE))
1707 htab->srelgot->size += sizeof (Elf32_External_Rel);
1708 else if (GOT_TLS_GD_P (tls_type))
1709 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
1710 else if (! GOT_TLS_GDESC_P (tls_type)
1711 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1712 || h->root.type != bfd_link_hash_undefweak)
1714 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1715 htab->srelgot->size += sizeof (Elf32_External_Rel);
1716 if (GOT_TLS_GDESC_P (tls_type))
1717 htab->srelplt->size += sizeof (Elf32_External_Rel);
1720 h->got.offset = (bfd_vma) -1;
1722 if (eh->dyn_relocs == NULL)
1725 /* In the shared -Bsymbolic case, discard space allocated for
1726 dynamic pc-relative relocs against symbols which turn out to be
1727 defined in regular objects. For the normal shared case, discard
1728 space for pc-relative relocs that have become local due to symbol
1729 visibility changes. */
1733 /* The only reloc that uses pc_count is R_386_PC32, which will
1734 appear on a call or on something like ".long foo - .". We
1735 want calls to protected symbols to resolve directly to the
1736 function rather than going via the plt. If people want
1737 function pointer comparisons to work as expected then they
1738 should avoid writing assembly like ".long foo - .". */
1739 if (SYMBOL_CALLS_LOCAL (info, h))
1741 struct elf_i386_dyn_relocs **pp;
1743 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1745 p->count -= p->pc_count;
1754 /* Also discard relocs on undefined weak syms with non-default
1756 if (eh->dyn_relocs != NULL
1757 && h->root.type == bfd_link_hash_undefweak)
1759 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1760 eh->dyn_relocs = NULL;
1762 /* Make sure undefined weak symbols are output as a dynamic
1764 else if (h->dynindx == -1
1765 && !h->forced_local)
1767 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1772 else if (ELIMINATE_COPY_RELOCS)
1774 /* For the non-shared case, discard space for relocs against
1775 symbols which turn out to need copy relocs or are not
1781 || (htab->elf.dynamic_sections_created
1782 && (h->root.type == bfd_link_hash_undefweak
1783 || h->root.type == bfd_link_hash_undefined))))
1785 /* Make sure this symbol is output as a dynamic symbol.
1786 Undefined weak syms won't yet be marked as dynamic. */
1787 if (h->dynindx == -1
1788 && !h->forced_local)
1790 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1794 /* If that succeeded, we know we'll be keeping all the
1796 if (h->dynindx != -1)
1800 eh->dyn_relocs = NULL;
1805 /* Finally, allocate space. */
1806 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1808 asection *sreloc = elf_section_data (p->sec)->sreloc;
1809 sreloc->size += p->count * sizeof (Elf32_External_Rel);
1815 /* Find any dynamic relocs that apply to read-only sections. */
1818 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1820 struct elf_i386_link_hash_entry *eh;
1821 struct elf_i386_dyn_relocs *p;
1823 if (h->root.type == bfd_link_hash_warning)
1824 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1826 eh = (struct elf_i386_link_hash_entry *) h;
1827 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1829 asection *s = p->sec->output_section;
1831 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1833 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1835 info->flags |= DF_TEXTREL;
1837 /* Not an error, just cut short the traversal. */
1844 /* Set the sizes of the dynamic sections. */
1847 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1848 struct bfd_link_info *info)
1850 struct elf_i386_link_hash_table *htab;
1856 htab = elf_i386_hash_table (info);
1857 dynobj = htab->elf.dynobj;
1861 if (htab->elf.dynamic_sections_created)
1863 /* Set the contents of the .interp section to the interpreter. */
1864 if (info->executable)
1866 s = bfd_get_section_by_name (dynobj, ".interp");
1869 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1870 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1874 /* Set up .got offsets for local syms, and space for local dynamic
1876 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1878 bfd_signed_vma *local_got;
1879 bfd_signed_vma *end_local_got;
1880 char *local_tls_type;
1881 bfd_vma *local_tlsdesc_gotent;
1882 bfd_size_type locsymcount;
1883 Elf_Internal_Shdr *symtab_hdr;
1886 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1889 for (s = ibfd->sections; s != NULL; s = s->next)
1891 struct elf_i386_dyn_relocs *p;
1893 for (p = ((struct elf_i386_dyn_relocs *)
1894 elf_section_data (s)->local_dynrel);
1898 if (!bfd_is_abs_section (p->sec)
1899 && bfd_is_abs_section (p->sec->output_section))
1901 /* Input section has been discarded, either because
1902 it is a copy of a linkonce section or due to
1903 linker script /DISCARD/, so we'll be discarding
1906 else if (p->count != 0)
1908 srel = elf_section_data (p->sec)->sreloc;
1909 srel->size += p->count * sizeof (Elf32_External_Rel);
1910 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1911 info->flags |= DF_TEXTREL;
1916 local_got = elf_local_got_refcounts (ibfd);
1920 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1921 locsymcount = symtab_hdr->sh_info;
1922 end_local_got = local_got + locsymcount;
1923 local_tls_type = elf_i386_local_got_tls_type (ibfd);
1924 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
1926 srel = htab->srelgot;
1927 for (; local_got < end_local_got;
1928 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
1930 *local_tlsdesc_gotent = (bfd_vma) -1;
1933 if (GOT_TLS_GDESC_P (*local_tls_type))
1935 *local_tlsdesc_gotent = htab->sgotplt->size
1936 - elf_i386_compute_jump_table_size (htab);
1937 htab->sgotplt->size += 8;
1938 *local_got = (bfd_vma) -2;
1940 if (! GOT_TLS_GDESC_P (*local_tls_type)
1941 || GOT_TLS_GD_P (*local_tls_type))
1943 *local_got = s->size;
1945 if (GOT_TLS_GD_P (*local_tls_type)
1946 || *local_tls_type == GOT_TLS_IE_BOTH)
1950 || GOT_TLS_GD_ANY_P (*local_tls_type)
1951 || (*local_tls_type & GOT_TLS_IE))
1953 if (*local_tls_type == GOT_TLS_IE_BOTH)
1954 srel->size += 2 * sizeof (Elf32_External_Rel);
1955 else if (GOT_TLS_GD_P (*local_tls_type)
1956 || ! GOT_TLS_GDESC_P (*local_tls_type))
1957 srel->size += sizeof (Elf32_External_Rel);
1958 if (GOT_TLS_GDESC_P (*local_tls_type))
1959 htab->srelplt->size += sizeof (Elf32_External_Rel);
1963 *local_got = (bfd_vma) -1;
1967 if (htab->tls_ldm_got.refcount > 0)
1969 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1971 htab->tls_ldm_got.offset = htab->sgot->size;
1972 htab->sgot->size += 8;
1973 htab->srelgot->size += sizeof (Elf32_External_Rel);
1976 htab->tls_ldm_got.offset = -1;
1978 /* Allocate global sym .plt and .got entries, and space for global
1979 sym dynamic relocs. */
1980 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1982 /* For every jump slot reserved in the sgotplt, reloc_count is
1983 incremented. However, when we reserve space for TLS descriptors,
1984 it's not incremented, so in order to compute the space reserved
1985 for them, it suffices to multiply the reloc count by the jump
1988 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
1990 /* We now have determined the sizes of the various dynamic sections.
1991 Allocate memory for them. */
1993 for (s = dynobj->sections; s != NULL; s = s->next)
1995 bfd_boolean strip_section = TRUE;
1997 if ((s->flags & SEC_LINKER_CREATED) == 0)
2002 || s == htab->sgotplt
2003 || s == htab->sdynbss)
2005 /* Strip this section if we don't need it; see the
2007 /* We'd like to strip these sections if they aren't needed, but if
2008 we've exported dynamic symbols from them we must leave them.
2009 It's too late to tell BFD to get rid of the symbols. */
2011 if (htab->elf.hplt != NULL)
2012 strip_section = FALSE;
2014 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2016 if (s->size != 0 && s != htab->srelplt && s != htab->srelplt2)
2019 /* We use the reloc_count field as a counter if we need
2020 to copy relocs into the output file. */
2025 /* It's not one of our sections, so don't allocate space. */
2031 /* If we don't need this section, strip it from the
2032 output file. This is mostly to handle .rel.bss and
2033 .rel.plt. We must create both sections in
2034 create_dynamic_sections, because they must be created
2035 before the linker maps input sections to output
2036 sections. The linker does that before
2037 adjust_dynamic_symbol is called, and it is that
2038 function which decides whether anything needs to go
2039 into these sections. */
2041 s->flags |= SEC_EXCLUDE;
2045 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2048 /* Allocate memory for the section contents. We use bfd_zalloc
2049 here in case unused entries are not reclaimed before the
2050 section's contents are written out. This should not happen,
2051 but this way if it does, we get a R_386_NONE reloc instead
2053 s->contents = bfd_zalloc (dynobj, s->size);
2054 if (s->contents == NULL)
2058 if (htab->elf.dynamic_sections_created)
2060 /* Add some entries to the .dynamic section. We fill in the
2061 values later, in elf_i386_finish_dynamic_sections, but we
2062 must add the entries now so that we get the correct size for
2063 the .dynamic section. The DT_DEBUG entry is filled in by the
2064 dynamic linker and used by the debugger. */
2065 #define add_dynamic_entry(TAG, VAL) \
2066 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2068 if (info->executable)
2070 if (!add_dynamic_entry (DT_DEBUG, 0))
2074 if (htab->splt->size != 0)
2076 if (!add_dynamic_entry (DT_PLTGOT, 0)
2077 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2078 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2079 || !add_dynamic_entry (DT_JMPREL, 0))
2085 if (!add_dynamic_entry (DT_REL, 0)
2086 || !add_dynamic_entry (DT_RELSZ, 0)
2087 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2090 /* If any dynamic relocs apply to a read-only section,
2091 then we need a DT_TEXTREL entry. */
2092 if ((info->flags & DF_TEXTREL) == 0)
2093 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2096 if ((info->flags & DF_TEXTREL) != 0)
2098 if (!add_dynamic_entry (DT_TEXTREL, 0))
2103 #undef add_dynamic_entry
2109 elf_i386_always_size_sections (bfd *output_bfd,
2110 struct bfd_link_info *info)
2112 asection *tls_sec = elf_hash_table (info)->tls_sec;
2116 struct elf_link_hash_entry *tlsbase;
2118 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2119 "_TLS_MODULE_BASE_",
2120 FALSE, FALSE, FALSE);
2122 if (tlsbase && tlsbase->type == STT_TLS)
2124 struct bfd_link_hash_entry *bh = NULL;
2125 const struct elf_backend_data *bed
2126 = get_elf_backend_data (output_bfd);
2128 if (!(_bfd_generic_link_add_one_symbol
2129 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2130 tls_sec, 0, NULL, FALSE,
2131 bed->collect, &bh)))
2133 tlsbase = (struct elf_link_hash_entry *)bh;
2134 tlsbase->def_regular = 1;
2135 tlsbase->other = STV_HIDDEN;
2136 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2143 /* Set the correct type for an x86 ELF section. We do this by the
2144 section name, which is a hack, but ought to work. */
2147 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2148 Elf_Internal_Shdr *hdr,
2151 register const char *name;
2153 name = bfd_get_section_name (abfd, sec);
2155 /* This is an ugly, but unfortunately necessary hack that is
2156 needed when producing EFI binaries on x86. It tells
2157 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2158 containing ELF relocation info. We need this hack in order to
2159 be able to generate ELF binaries that can be translated into
2160 EFI applications (which are essentially COFF objects). Those
2161 files contain a COFF ".reloc" section inside an ELFNN object,
2162 which would normally cause BFD to segfault because it would
2163 attempt to interpret this section as containing relocation
2164 entries for section "oc". With this hack enabled, ".reloc"
2165 will be treated as a normal data section, which will avoid the
2166 segfault. However, you won't be able to create an ELFNN binary
2167 with a section named "oc" that needs relocations, but that's
2168 the kind of ugly side-effects you get when detecting section
2169 types based on their names... In practice, this limitation is
2170 unlikely to bite. */
2171 if (strcmp (name, ".reloc") == 0)
2172 hdr->sh_type = SHT_PROGBITS;
2177 /* Return the base VMA address which should be subtracted from real addresses
2178 when resolving @dtpoff relocation.
2179 This is PT_TLS segment p_vaddr. */
2182 dtpoff_base (struct bfd_link_info *info)
2184 /* If tls_sec is NULL, we should have signalled an error already. */
2185 if (elf_hash_table (info)->tls_sec == NULL)
2187 return elf_hash_table (info)->tls_sec->vma;
2190 /* Return the relocation value for @tpoff relocation
2191 if STT_TLS virtual address is ADDRESS. */
2194 tpoff (struct bfd_link_info *info, bfd_vma address)
2196 struct elf_link_hash_table *htab = elf_hash_table (info);
2198 /* If tls_sec is NULL, we should have signalled an error already. */
2199 if (htab->tls_sec == NULL)
2201 return htab->tls_size + htab->tls_sec->vma - address;
2204 /* Relocate an i386 ELF section. */
2207 elf_i386_relocate_section (bfd *output_bfd,
2208 struct bfd_link_info *info,
2210 asection *input_section,
2212 Elf_Internal_Rela *relocs,
2213 Elf_Internal_Sym *local_syms,
2214 asection **local_sections)
2216 struct elf_i386_link_hash_table *htab;
2217 Elf_Internal_Shdr *symtab_hdr;
2218 struct elf_link_hash_entry **sym_hashes;
2219 bfd_vma *local_got_offsets;
2220 bfd_vma *local_tlsdesc_gotents;
2221 Elf_Internal_Rela *rel;
2222 Elf_Internal_Rela *relend;
2224 htab = elf_i386_hash_table (info);
2225 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2226 sym_hashes = elf_sym_hashes (input_bfd);
2227 local_got_offsets = elf_local_got_offsets (input_bfd);
2228 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
2231 relend = relocs + input_section->reloc_count;
2232 for (; rel < relend; rel++)
2234 unsigned int r_type;
2235 reloc_howto_type *howto;
2236 unsigned long r_symndx;
2237 struct elf_link_hash_entry *h;
2238 Elf_Internal_Sym *sym;
2240 bfd_vma off, offplt;
2242 bfd_boolean unresolved_reloc;
2243 bfd_reloc_status_type r;
2247 r_type = ELF32_R_TYPE (rel->r_info);
2248 if (r_type == R_386_GNU_VTINHERIT
2249 || r_type == R_386_GNU_VTENTRY)
2252 if ((indx = r_type) >= R_386_standard
2253 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2254 >= R_386_ext - R_386_standard)
2255 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2256 >= R_386_tls - R_386_ext))
2258 (*_bfd_error_handler)
2259 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2260 input_bfd, input_section, r_type);
2261 bfd_set_error (bfd_error_bad_value);
2264 howto = elf_howto_table + indx;
2266 r_symndx = ELF32_R_SYM (rel->r_info);
2268 if (info->relocatable)
2273 /* This is a relocatable link. We don't have to change
2274 anything, unless the reloc is against a section symbol,
2275 in which case we have to adjust according to where the
2276 section symbol winds up in the output section. */
2277 if (r_symndx >= symtab_hdr->sh_info)
2280 sym = local_syms + r_symndx;
2281 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2284 sec = local_sections[r_symndx];
2285 val = sec->output_offset;
2289 where = contents + rel->r_offset;
2290 switch (howto->size)
2292 /* FIXME: overflow checks. */
2294 val += bfd_get_8 (input_bfd, where);
2295 bfd_put_8 (input_bfd, val, where);
2298 val += bfd_get_16 (input_bfd, where);
2299 bfd_put_16 (input_bfd, val, where);
2302 val += bfd_get_32 (input_bfd, where);
2303 bfd_put_32 (input_bfd, val, where);
2311 /* This is a final link. */
2315 unresolved_reloc = FALSE;
2316 if (r_symndx < symtab_hdr->sh_info)
2318 sym = local_syms + r_symndx;
2319 sec = local_sections[r_symndx];
2320 relocation = (sec->output_section->vma
2321 + sec->output_offset
2323 if ((sec->flags & SEC_MERGE)
2324 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2328 bfd_byte *where = contents + rel->r_offset;
2330 switch (howto->size)
2333 addend = bfd_get_8 (input_bfd, where);
2334 if (howto->pc_relative)
2336 addend = (addend ^ 0x80) - 0x80;
2341 addend = bfd_get_16 (input_bfd, where);
2342 if (howto->pc_relative)
2344 addend = (addend ^ 0x8000) - 0x8000;
2349 addend = bfd_get_32 (input_bfd, where);
2350 if (howto->pc_relative)
2352 addend = (addend ^ 0x80000000) - 0x80000000;
2361 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend);
2362 addend -= relocation;
2363 addend += msec->output_section->vma + msec->output_offset;
2365 switch (howto->size)
2368 /* FIXME: overflow checks. */
2369 if (howto->pc_relative)
2371 bfd_put_8 (input_bfd, addend, where);
2374 if (howto->pc_relative)
2376 bfd_put_16 (input_bfd, addend, where);
2379 if (howto->pc_relative)
2381 bfd_put_32 (input_bfd, addend, where);
2390 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2391 r_symndx, symtab_hdr, sym_hashes,
2393 unresolved_reloc, warned);
2398 /* r_symndx will be zero only for relocs against symbols from
2399 removed linkonce sections, or sections discarded by a linker
2400 script. For these relocs, we just want the section contents
2401 zeroed. Avoid any special processing in the switch below. */
2402 r_type = R_386_NONE;
2405 if (howto->pc_relative)
2406 relocation = (input_section->output_section->vma
2407 + input_section->output_offset
2414 /* Relocation is to the entry for this symbol in the global
2416 if (htab->sgot == NULL)
2423 off = h->got.offset;
2424 dyn = htab->elf.dynamic_sections_created;
2425 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2427 && SYMBOL_REFERENCES_LOCAL (info, h))
2428 || (ELF_ST_VISIBILITY (h->other)
2429 && h->root.type == bfd_link_hash_undefweak))
2431 /* This is actually a static link, or it is a
2432 -Bsymbolic link and the symbol is defined
2433 locally, or the symbol was forced to be local
2434 because of a version file. We must initialize
2435 this entry in the global offset table. Since the
2436 offset must always be a multiple of 4, we use the
2437 least significant bit to record whether we have
2438 initialized it already.
2440 When doing a dynamic link, we create a .rel.got
2441 relocation entry to initialize the value. This
2442 is done in the finish_dynamic_symbol routine. */
2447 bfd_put_32 (output_bfd, relocation,
2448 htab->sgot->contents + off);
2453 unresolved_reloc = FALSE;
2457 if (local_got_offsets == NULL)
2460 off = local_got_offsets[r_symndx];
2462 /* The offset must always be a multiple of 4. We use
2463 the least significant bit to record whether we have
2464 already generated the necessary reloc. */
2469 bfd_put_32 (output_bfd, relocation,
2470 htab->sgot->contents + off);
2475 Elf_Internal_Rela outrel;
2482 outrel.r_offset = (htab->sgot->output_section->vma
2483 + htab->sgot->output_offset
2485 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2487 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
2488 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2491 local_got_offsets[r_symndx] |= 1;
2495 if (off >= (bfd_vma) -2)
2498 relocation = htab->sgot->output_section->vma
2499 + htab->sgot->output_offset + off
2500 - htab->sgotplt->output_section->vma
2501 - htab->sgotplt->output_offset;
2505 /* Relocation is relative to the start of the global offset
2508 /* Check to make sure it isn't a protected function symbol
2509 for shared library since it may not be local when used
2510 as function address. */
2512 && !info->executable
2515 && h->type == STT_FUNC
2516 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2518 (*_bfd_error_handler)
2519 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2520 input_bfd, h->root.root.string);
2521 bfd_set_error (bfd_error_bad_value);
2525 /* Note that sgot is not involved in this
2526 calculation. We always want the start of .got.plt. If we
2527 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2528 permitted by the ABI, we might have to change this
2530 relocation -= htab->sgotplt->output_section->vma
2531 + htab->sgotplt->output_offset;
2535 /* Use global offset table as symbol value. */
2536 relocation = htab->sgotplt->output_section->vma
2537 + htab->sgotplt->output_offset;
2538 unresolved_reloc = FALSE;
2542 /* Relocation is to the entry for this symbol in the
2543 procedure linkage table. */
2545 /* Resolve a PLT32 reloc against a local symbol directly,
2546 without using the procedure linkage table. */
2550 if (h->plt.offset == (bfd_vma) -1
2551 || htab->splt == NULL)
2553 /* We didn't make a PLT entry for this symbol. This
2554 happens when statically linking PIC code, or when
2555 using -Bsymbolic. */
2559 relocation = (htab->splt->output_section->vma
2560 + htab->splt->output_offset
2562 unresolved_reloc = FALSE;
2567 if ((input_section->flags & SEC_ALLOC) == 0)
2572 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2573 || h->root.type != bfd_link_hash_undefweak)
2574 && (r_type != R_386_PC32
2575 || !SYMBOL_CALLS_LOCAL (info, h)))
2576 || (ELIMINATE_COPY_RELOCS
2583 || h->root.type == bfd_link_hash_undefweak
2584 || h->root.type == bfd_link_hash_undefined)))
2586 Elf_Internal_Rela outrel;
2588 bfd_boolean skip, relocate;
2591 /* When generating a shared object, these relocations
2592 are copied into the output file to be resolved at run
2599 _bfd_elf_section_offset (output_bfd, info, input_section,
2601 if (outrel.r_offset == (bfd_vma) -1)
2603 else if (outrel.r_offset == (bfd_vma) -2)
2604 skip = TRUE, relocate = TRUE;
2605 outrel.r_offset += (input_section->output_section->vma
2606 + input_section->output_offset);
2609 memset (&outrel, 0, sizeof outrel);
2612 && (r_type == R_386_PC32
2614 || !SYMBOLIC_BIND (info, h)
2615 || !h->def_regular))
2616 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2619 /* This symbol is local, or marked to become local. */
2621 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2624 sreloc = elf_section_data (input_section)->sreloc;
2628 loc = sreloc->contents;
2629 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2630 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2632 /* If this reloc is against an external symbol, we do
2633 not want to fiddle with the addend. Otherwise, we
2634 need to include the symbol value so that it becomes
2635 an addend for the dynamic reloc. */
2644 Elf_Internal_Rela outrel;
2648 outrel.r_offset = rel->r_offset
2649 + input_section->output_section->vma
2650 + input_section->output_offset;
2651 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2652 sreloc = elf_section_data (input_section)->sreloc;
2655 loc = sreloc->contents;
2656 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2657 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2662 case R_386_TLS_GOTDESC:
2663 case R_386_TLS_DESC_CALL:
2664 case R_386_TLS_IE_32:
2665 case R_386_TLS_GOTIE:
2666 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
2667 tls_type = GOT_UNKNOWN;
2668 if (h == NULL && local_got_offsets)
2669 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
2672 tls_type = elf_i386_hash_entry(h)->tls_type;
2673 if (!info->shared && h->dynindx == -1 && (tls_type & GOT_TLS_IE))
2674 r_type = R_386_TLS_LE_32;
2676 if (tls_type == GOT_TLS_IE)
2677 tls_type = GOT_TLS_IE_NEG;
2678 if (r_type == R_386_TLS_GD
2679 || r_type == R_386_TLS_GOTDESC
2680 || r_type == R_386_TLS_DESC_CALL)
2682 if (tls_type == GOT_TLS_IE_POS)
2683 r_type = R_386_TLS_GOTIE;
2684 else if (tls_type & GOT_TLS_IE)
2685 r_type = R_386_TLS_IE_32;
2688 if (r_type == R_386_TLS_LE_32)
2690 BFD_ASSERT (! unresolved_reloc);
2691 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
2693 unsigned int val, type;
2696 /* GD->LE transition. */
2697 BFD_ASSERT (rel->r_offset >= 2);
2698 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2699 BFD_ASSERT (type == 0x8d || type == 0x04);
2700 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
2701 BFD_ASSERT (bfd_get_8 (input_bfd,
2702 contents + rel->r_offset + 4)
2704 BFD_ASSERT (rel + 1 < relend);
2705 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2706 roff = rel->r_offset + 5;
2707 val = bfd_get_8 (input_bfd,
2708 contents + rel->r_offset - 1);
2711 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2713 movl %gs:0, %eax; subl $foo@tpoff, %eax
2714 (6 byte form of subl). */
2715 BFD_ASSERT (rel->r_offset >= 3);
2716 BFD_ASSERT (bfd_get_8 (input_bfd,
2717 contents + rel->r_offset - 3)
2719 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2720 memcpy (contents + rel->r_offset - 3,
2721 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2725 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2726 if (rel->r_offset + 10 <= input_section->size
2727 && bfd_get_8 (input_bfd,
2728 contents + rel->r_offset + 9) == 0x90)
2730 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2732 movl %gs:0, %eax; subl $foo@tpoff, %eax
2733 (6 byte form of subl). */
2734 memcpy (contents + rel->r_offset - 2,
2735 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2736 roff = rel->r_offset + 6;
2740 /* leal foo(%reg), %eax; call ___tls_get_addr
2742 movl %gs:0, %eax; subl $foo@tpoff, %eax
2743 (5 byte form of subl). */
2744 memcpy (contents + rel->r_offset - 2,
2745 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2748 bfd_put_32 (output_bfd, tpoff (info, relocation),
2750 /* Skip R_386_PLT32. */
2754 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
2756 /* GDesc -> LE transition.
2757 It's originally something like:
2758 leal x@tlsdesc(%ebx), %eax
2762 Registers other than %eax may be set up here. */
2764 unsigned int val, type;
2767 /* First, make sure it's a leal adding ebx to a
2768 32-bit offset into any register, although it's
2769 probably almost always going to be eax. */
2770 roff = rel->r_offset;
2771 BFD_ASSERT (roff >= 2);
2772 type = bfd_get_8 (input_bfd, contents + roff - 2);
2773 BFD_ASSERT (type == 0x8d);
2774 val = bfd_get_8 (input_bfd, contents + roff - 1);
2775 BFD_ASSERT ((val & 0xc7) == 0x83);
2776 BFD_ASSERT (roff + 4 <= input_section->size);
2778 /* Now modify the instruction as appropriate. */
2779 /* aoliva FIXME: remove the above and xor the byte
2781 bfd_put_8 (output_bfd, val ^ 0x86,
2782 contents + roff - 1);
2783 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2787 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
2789 /* GDesc -> LE transition.
2795 unsigned int val, type;
2798 /* First, make sure it's a call *(%eax). */
2799 roff = rel->r_offset;
2800 BFD_ASSERT (roff + 2 <= input_section->size);
2801 type = bfd_get_8 (input_bfd, contents + roff);
2802 BFD_ASSERT (type == 0xff);
2803 val = bfd_get_8 (input_bfd, contents + roff + 1);
2804 BFD_ASSERT (val == 0x10);
2806 /* Now modify the instruction as appropriate. Use
2807 xchg %ax,%ax instead of 2 nops. */
2808 bfd_put_8 (output_bfd, 0x66, contents + roff);
2809 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2812 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
2814 unsigned int val, type;
2816 /* IE->LE transition:
2817 Originally it can be one of:
2825 BFD_ASSERT (rel->r_offset >= 1);
2826 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2827 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
2830 /* movl foo, %eax. */
2831 bfd_put_8 (output_bfd, 0xb8,
2832 contents + rel->r_offset - 1);
2836 BFD_ASSERT (rel->r_offset >= 2);
2837 type = bfd_get_8 (input_bfd,
2838 contents + rel->r_offset - 2);
2843 BFD_ASSERT ((val & 0xc7) == 0x05);
2844 bfd_put_8 (output_bfd, 0xc7,
2845 contents + rel->r_offset - 2);
2846 bfd_put_8 (output_bfd,
2847 0xc0 | ((val >> 3) & 7),
2848 contents + rel->r_offset - 1);
2852 BFD_ASSERT ((val & 0xc7) == 0x05);
2853 bfd_put_8 (output_bfd, 0x81,
2854 contents + rel->r_offset - 2);
2855 bfd_put_8 (output_bfd,
2856 0xc0 | ((val >> 3) & 7),
2857 contents + rel->r_offset - 1);
2864 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2865 contents + rel->r_offset);
2870 unsigned int val, type;
2872 /* {IE_32,GOTIE}->LE transition:
2873 Originally it can be one of:
2874 subl foo(%reg1), %reg2
2875 movl foo(%reg1), %reg2
2876 addl foo(%reg1), %reg2
2879 movl $foo, %reg2 (6 byte form)
2880 addl $foo, %reg2. */
2881 BFD_ASSERT (rel->r_offset >= 2);
2882 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2883 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2884 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
2885 BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4);
2889 bfd_put_8 (output_bfd, 0xc7,
2890 contents + rel->r_offset - 2);
2891 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2892 contents + rel->r_offset - 1);
2894 else if (type == 0x2b)
2897 bfd_put_8 (output_bfd, 0x81,
2898 contents + rel->r_offset - 2);
2899 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2900 contents + rel->r_offset - 1);
2902 else if (type == 0x03)
2905 bfd_put_8 (output_bfd, 0x81,
2906 contents + rel->r_offset - 2);
2907 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2908 contents + rel->r_offset - 1);
2912 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
2913 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2914 contents + rel->r_offset);
2916 bfd_put_32 (output_bfd, tpoff (info, relocation),
2917 contents + rel->r_offset);
2922 if (htab->sgot == NULL)
2927 off = h->got.offset;
2928 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
2932 if (local_got_offsets == NULL)
2935 off = local_got_offsets[r_symndx];
2936 offplt = local_tlsdesc_gotents[r_symndx];
2943 Elf_Internal_Rela outrel;
2948 if (htab->srelgot == NULL)
2951 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2953 if (GOT_TLS_GDESC_P (tls_type))
2955 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
2956 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
2957 <= htab->sgotplt->size);
2958 outrel.r_offset = (htab->sgotplt->output_section->vma
2959 + htab->sgotplt->output_offset
2961 + htab->sgotplt_jump_table_size);
2962 sreloc = htab->srelplt;
2963 loc = sreloc->contents;
2964 loc += (htab->next_tls_desc_index++
2965 * sizeof (Elf32_External_Rel));
2966 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
2967 <= sreloc->contents + sreloc->size);
2968 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2971 BFD_ASSERT (! unresolved_reloc);
2972 bfd_put_32 (output_bfd,
2973 relocation - dtpoff_base (info),
2974 htab->sgotplt->contents + offplt
2975 + htab->sgotplt_jump_table_size + 4);
2979 bfd_put_32 (output_bfd, 0,
2980 htab->sgotplt->contents + offplt
2981 + htab->sgotplt_jump_table_size + 4);
2985 sreloc = htab->srelgot;
2987 outrel.r_offset = (htab->sgot->output_section->vma
2988 + htab->sgot->output_offset + off);
2990 if (GOT_TLS_GD_P (tls_type))
2991 dr_type = R_386_TLS_DTPMOD32;
2992 else if (GOT_TLS_GDESC_P (tls_type))
2994 else if (tls_type == GOT_TLS_IE_POS)
2995 dr_type = R_386_TLS_TPOFF;
2997 dr_type = R_386_TLS_TPOFF32;
2999 if (dr_type == R_386_TLS_TPOFF && indx == 0)
3000 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3001 htab->sgot->contents + off);
3002 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3003 bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
3004 htab->sgot->contents + off);
3005 else if (dr_type != R_386_TLS_DESC)
3006 bfd_put_32 (output_bfd, 0,
3007 htab->sgot->contents + off);
3008 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3010 loc = sreloc->contents;
3011 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3012 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3013 <= sreloc->contents + sreloc->size);
3014 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3016 if (GOT_TLS_GD_P (tls_type))
3020 BFD_ASSERT (! unresolved_reloc);
3021 bfd_put_32 (output_bfd,
3022 relocation - dtpoff_base (info),
3023 htab->sgot->contents + off + 4);
3027 bfd_put_32 (output_bfd, 0,
3028 htab->sgot->contents + off + 4);
3029 outrel.r_info = ELF32_R_INFO (indx,
3030 R_386_TLS_DTPOFF32);
3031 outrel.r_offset += 4;
3032 sreloc->reloc_count++;
3033 loc += sizeof (Elf32_External_Rel);
3034 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3035 <= sreloc->contents + sreloc->size);
3036 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3039 else if (tls_type == GOT_TLS_IE_BOTH)
3041 bfd_put_32 (output_bfd,
3042 indx == 0 ? relocation - dtpoff_base (info) : 0,
3043 htab->sgot->contents + off + 4);
3044 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3045 outrel.r_offset += 4;
3046 sreloc->reloc_count++;
3047 loc += sizeof (Elf32_External_Rel);
3048 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3055 local_got_offsets[r_symndx] |= 1;
3058 if (off >= (bfd_vma) -2
3059 && ! GOT_TLS_GDESC_P (tls_type))
3061 if (r_type == R_386_TLS_GOTDESC
3062 || r_type == R_386_TLS_DESC_CALL)
3064 relocation = htab->sgotplt_jump_table_size + offplt;
3065 unresolved_reloc = FALSE;
3067 else if (r_type == ELF32_R_TYPE (rel->r_info))
3069 bfd_vma g_o_t = htab->sgotplt->output_section->vma
3070 + htab->sgotplt->output_offset;
3071 relocation = htab->sgot->output_section->vma
3072 + htab->sgot->output_offset + off - g_o_t;
3073 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3074 && tls_type == GOT_TLS_IE_BOTH)
3076 if (r_type == R_386_TLS_IE)
3077 relocation += g_o_t;
3078 unresolved_reloc = FALSE;
3080 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3082 unsigned int val, type;
3085 /* GD->IE transition. */
3086 BFD_ASSERT (rel->r_offset >= 2);
3087 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3088 BFD_ASSERT (type == 0x8d || type == 0x04);
3089 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
3090 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
3092 BFD_ASSERT (rel + 1 < relend);
3093 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
3094 roff = rel->r_offset - 3;
3095 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3098 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3100 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3101 BFD_ASSERT (rel->r_offset >= 3);
3102 BFD_ASSERT (bfd_get_8 (input_bfd,
3103 contents + rel->r_offset - 3)
3105 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
3110 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3112 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3113 BFD_ASSERT (rel->r_offset + 10 <= input_section->size);
3114 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
3115 BFD_ASSERT (bfd_get_8 (input_bfd,
3116 contents + rel->r_offset + 9)
3118 roff = rel->r_offset - 2;
3120 memcpy (contents + roff,
3121 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3122 contents[roff + 7] = 0x80 | (val & 7);
3123 /* If foo is used only with foo@gotntpoff(%reg) and
3124 foo@indntpoff, but not with foo@gottpoff(%reg), change
3125 subl $foo@gottpoff(%reg), %eax
3127 addl $foo@gotntpoff(%reg), %eax. */
3128 if (tls_type == GOT_TLS_IE_POS)
3129 contents[roff + 6] = 0x03;
3130 bfd_put_32 (output_bfd,
3131 htab->sgot->output_section->vma
3132 + htab->sgot->output_offset + off
3133 - htab->sgotplt->output_section->vma
3134 - htab->sgotplt->output_offset,
3135 contents + roff + 8);
3136 /* Skip R_386_PLT32. */
3140 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3142 /* GDesc -> IE transition.
3143 It's originally something like:
3144 leal x@tlsdesc(%ebx), %eax
3147 movl x@gotntpoff(%ebx), %eax # before nop; nop
3149 movl x@gottpoff(%ebx), %eax # before negl %eax
3151 Registers other than %eax may be set up here. */
3153 unsigned int val, type;
3156 /* First, make sure it's a leal adding ebx to a 32-bit
3157 offset into any register, although it's probably
3158 almost always going to be eax. */
3159 roff = rel->r_offset;
3160 BFD_ASSERT (roff >= 2);
3161 type = bfd_get_8 (input_bfd, contents + roff - 2);
3162 BFD_ASSERT (type == 0x8d);
3163 val = bfd_get_8 (input_bfd, contents + roff - 1);
3164 BFD_ASSERT ((val & 0xc7) == 0x83);
3165 BFD_ASSERT (roff + 4 <= input_section->size);
3167 /* Now modify the instruction as appropriate. */
3168 /* To turn a leal into a movl in the form we use it, it
3169 suffices to change the first byte from 0x8d to 0x8b.
3170 aoliva FIXME: should we decide to keep the leal, all
3171 we have to do is remove the statement below, and
3172 adjust the relaxation of R_386_TLS_DESC_CALL. */
3173 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3175 if (tls_type == GOT_TLS_IE_BOTH)
3178 bfd_put_32 (output_bfd,
3179 htab->sgot->output_section->vma
3180 + htab->sgot->output_offset + off
3181 - htab->sgotplt->output_section->vma
3182 - htab->sgotplt->output_offset,
3186 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3188 /* GDesc -> IE transition.
3196 depending on how we transformed the TLS_GOTDESC above.
3199 unsigned int val, type;
3202 /* First, make sure it's a call *(%eax). */
3203 roff = rel->r_offset;
3204 BFD_ASSERT (roff + 2 <= input_section->size);
3205 type = bfd_get_8 (input_bfd, contents + roff);
3206 BFD_ASSERT (type == 0xff);
3207 val = bfd_get_8 (input_bfd, contents + roff + 1);
3208 BFD_ASSERT (val == 0x10);
3210 /* Now modify the instruction as appropriate. */
3211 if (tls_type != GOT_TLS_IE_NEG)
3214 bfd_put_8 (output_bfd, 0x66, contents + roff);
3215 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3220 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3221 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3235 /* LD->LE transition:
3237 leal foo(%reg), %eax; call ___tls_get_addr.
3239 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3240 BFD_ASSERT (rel->r_offset >= 2);
3241 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
3243 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3244 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
3245 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
3246 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
3248 BFD_ASSERT (rel + 1 < relend);
3249 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
3250 memcpy (contents + rel->r_offset - 2,
3251 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3252 /* Skip R_386_PLT32. */
3257 if (htab->sgot == NULL)
3260 off = htab->tls_ldm_got.offset;
3265 Elf_Internal_Rela outrel;
3268 if (htab->srelgot == NULL)
3271 outrel.r_offset = (htab->sgot->output_section->vma
3272 + htab->sgot->output_offset + off);
3274 bfd_put_32 (output_bfd, 0,
3275 htab->sgot->contents + off);
3276 bfd_put_32 (output_bfd, 0,
3277 htab->sgot->contents + off + 4);
3278 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3279 loc = htab->srelgot->contents;
3280 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3281 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3282 htab->tls_ldm_got.offset |= 1;
3284 relocation = htab->sgot->output_section->vma
3285 + htab->sgot->output_offset + off
3286 - htab->sgotplt->output_section->vma
3287 - htab->sgotplt->output_offset;
3288 unresolved_reloc = FALSE;
3291 case R_386_TLS_LDO_32:
3292 if (info->shared || (input_section->flags & SEC_CODE) == 0)
3293 relocation -= dtpoff_base (info);
3295 /* When converting LDO to LE, we must negate. */
3296 relocation = -tpoff (info, relocation);
3299 case R_386_TLS_LE_32:
3303 Elf_Internal_Rela outrel;
3308 outrel.r_offset = rel->r_offset
3309 + input_section->output_section->vma
3310 + input_section->output_offset;
3311 if (h != NULL && h->dynindx != -1)
3315 if (r_type == R_386_TLS_LE_32)
3316 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3318 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3319 sreloc = elf_section_data (input_section)->sreloc;
3322 loc = sreloc->contents;
3323 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3324 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3327 else if (r_type == R_386_TLS_LE_32)
3328 relocation = dtpoff_base (info) - relocation;
3330 relocation -= dtpoff_base (info);
3332 else if (r_type == R_386_TLS_LE_32)
3333 relocation = tpoff (info, relocation);
3335 relocation = -tpoff (info, relocation);
3342 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3343 because such sections are not SEC_ALLOC and thus ld.so will
3344 not process them. */
3345 if (unresolved_reloc
3346 && !((input_section->flags & SEC_DEBUGGING) != 0
3349 (*_bfd_error_handler)
3350 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3353 (long) rel->r_offset,
3355 h->root.root.string);
3359 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3360 contents, rel->r_offset,
3363 if (r != bfd_reloc_ok)
3368 name = h->root.root.string;
3371 name = bfd_elf_string_from_elf_section (input_bfd,
3372 symtab_hdr->sh_link,
3377 name = bfd_section_name (input_bfd, sec);
3380 if (r == bfd_reloc_overflow)
3382 if (! ((*info->callbacks->reloc_overflow)
3383 (info, (h ? &h->root : NULL), name, howto->name,
3384 (bfd_vma) 0, input_bfd, input_section,
3390 (*_bfd_error_handler)
3391 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3392 input_bfd, input_section,
3393 (long) rel->r_offset, name, (int) r);
3402 /* Finish up dynamic symbol handling. We set the contents of various
3403 dynamic sections here. */
3406 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3407 struct bfd_link_info *info,
3408 struct elf_link_hash_entry *h,
3409 Elf_Internal_Sym *sym)
3411 struct elf_i386_link_hash_table *htab;
3413 htab = elf_i386_hash_table (info);
3415 if (h->plt.offset != (bfd_vma) -1)
3419 Elf_Internal_Rela rel;
3422 /* This symbol has an entry in the procedure linkage table. Set
3425 if (h->dynindx == -1
3426 || htab->splt == NULL
3427 || htab->sgotplt == NULL
3428 || htab->srelplt == NULL)
3431 /* Get the index in the procedure linkage table which
3432 corresponds to this symbol. This is the index of this symbol
3433 in all the symbols for which we are making plt entries. The
3434 first entry in the procedure linkage table is reserved. */
3435 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3437 /* Get the offset into the .got table of the entry that
3438 corresponds to this function. Each .got entry is 4 bytes.
3439 The first three are reserved. */
3440 got_offset = (plt_index + 3) * 4;
3442 /* Fill in the entry in the procedure linkage table. */
3445 memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
3447 bfd_put_32 (output_bfd,
3448 (htab->sgotplt->output_section->vma
3449 + htab->sgotplt->output_offset
3451 htab->splt->contents + h->plt.offset + 2);
3453 if (htab->is_vxworks)
3455 int s, k, reloc_index;
3457 /* Create the R_386_32 relocation referencing the GOT
3458 for this PLT entry. */
3460 /* S: Current slot number (zero-based). */
3461 s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3462 /* K: Number of relocations for PLTResolve. */
3464 k = PLTRESOLVE_RELOCS_SHLIB;
3466 k = PLTRESOLVE_RELOCS;
3467 /* Skip the PLTresolve relocations, and the relocations for
3468 the other PLT slots. */
3469 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3470 loc = (htab->srelplt2->contents + reloc_index
3471 * sizeof (Elf32_External_Rel));
3473 rel.r_offset = (htab->splt->output_section->vma
3474 + htab->splt->output_offset
3475 + h->plt.offset + 2),
3476 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3477 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3479 /* Create the R_386_32 relocation referencing the beginning of
3480 the PLT for this GOT entry. */
3481 rel.r_offset = (htab->sgotplt->output_section->vma
3482 + htab->sgotplt->output_offset
3484 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
3485 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3486 loc + sizeof (Elf32_External_Rel));
3491 memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
3493 bfd_put_32 (output_bfd, got_offset,
3494 htab->splt->contents + h->plt.offset + 2);
3497 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
3498 htab->splt->contents + h->plt.offset + 7);
3499 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
3500 htab->splt->contents + h->plt.offset + 12);
3502 /* Fill in the entry in the global offset table. */
3503 bfd_put_32 (output_bfd,
3504 (htab->splt->output_section->vma
3505 + htab->splt->output_offset
3508 htab->sgotplt->contents + got_offset);
3510 /* Fill in the entry in the .rel.plt section. */
3511 rel.r_offset = (htab->sgotplt->output_section->vma
3512 + htab->sgotplt->output_offset
3514 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3515 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
3516 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3518 if (!h->def_regular)
3520 /* Mark the symbol as undefined, rather than as defined in
3521 the .plt section. Leave the value if there were any
3522 relocations where pointer equality matters (this is a clue
3523 for the dynamic linker, to make function pointer
3524 comparisons work between an application and shared
3525 library), otherwise set it to zero. If a function is only
3526 called from a binary, there is no need to slow down
3527 shared libraries because of that. */
3528 sym->st_shndx = SHN_UNDEF;
3529 if (!h->pointer_equality_needed)
3534 if (h->got.offset != (bfd_vma) -1
3535 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
3536 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
3538 Elf_Internal_Rela rel;
3541 /* This symbol has an entry in the global offset table. Set it
3544 if (htab->sgot == NULL || htab->srelgot == NULL)
3547 rel.r_offset = (htab->sgot->output_section->vma
3548 + htab->sgot->output_offset
3549 + (h->got.offset & ~(bfd_vma) 1));
3551 /* If this is a static link, or it is a -Bsymbolic link and the
3552 symbol is defined locally or was forced to be local because
3553 of a version file, we just want to emit a RELATIVE reloc.
3554 The entry in the global offset table will already have been
3555 initialized in the relocate_section function. */
3557 && SYMBOL_REFERENCES_LOCAL (info, h))
3559 BFD_ASSERT((h->got.offset & 1) != 0);
3560 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3564 BFD_ASSERT((h->got.offset & 1) == 0);
3565 bfd_put_32 (output_bfd, (bfd_vma) 0,
3566 htab->sgot->contents + h->got.offset);
3567 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3570 loc = htab->srelgot->contents;
3571 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3572 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3577 Elf_Internal_Rela rel;
3580 /* This symbol needs a copy reloc. Set it up. */
3582 if (h->dynindx == -1
3583 || (h->root.type != bfd_link_hash_defined
3584 && h->root.type != bfd_link_hash_defweak)
3585 || htab->srelbss == NULL)
3588 rel.r_offset = (h->root.u.def.value
3589 + h->root.u.def.section->output_section->vma
3590 + h->root.u.def.section->output_offset);
3591 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3592 loc = htab->srelbss->contents;
3593 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
3594 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3597 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3598 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3599 is relative to the ".got" section. */
3600 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3601 || (!htab->is_vxworks && h == htab->elf.hgot))
3602 sym->st_shndx = SHN_ABS;
3607 /* Used to decide how to sort relocs in an optimal manner for the
3608 dynamic linker, before writing them out. */
3610 static enum elf_reloc_type_class
3611 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
3613 switch (ELF32_R_TYPE (rela->r_info))
3615 case R_386_RELATIVE:
3616 return reloc_class_relative;
3617 case R_386_JUMP_SLOT:
3618 return reloc_class_plt;
3620 return reloc_class_copy;
3622 return reloc_class_normal;
3626 /* Finish up the dynamic sections. */
3629 elf_i386_finish_dynamic_sections (bfd *output_bfd,
3630 struct bfd_link_info *info)
3632 struct elf_i386_link_hash_table *htab;
3636 htab = elf_i386_hash_table (info);
3637 dynobj = htab->elf.dynobj;
3638 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3640 if (htab->elf.dynamic_sections_created)
3642 Elf32_External_Dyn *dyncon, *dynconend;
3644 if (sdyn == NULL || htab->sgot == NULL)
3647 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3648 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3649 for (; dyncon < dynconend; dyncon++)
3651 Elf_Internal_Dyn dyn;
3654 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3663 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3668 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3673 dyn.d_un.d_val = s->size;
3677 /* My reading of the SVR4 ABI indicates that the
3678 procedure linkage table relocs (DT_JMPREL) should be
3679 included in the overall relocs (DT_REL). This is
3680 what Solaris does. However, UnixWare can not handle
3681 that case. Therefore, we override the DT_RELSZ entry
3682 here to make it not include the JMPREL relocs. */
3686 dyn.d_un.d_val -= s->size;
3690 /* We may not be using the standard ELF linker script.
3691 If .rel.plt is the first .rel section, we adjust
3692 DT_REL to not include it. */
3696 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
3698 dyn.d_un.d_ptr += s->size;
3702 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3705 /* Fill in the first entry in the procedure linkage table. */
3706 if (htab->splt && htab->splt->size > 0)
3710 memcpy (htab->splt->contents, elf_i386_pic_plt0_entry,
3711 sizeof (elf_i386_pic_plt0_entry));
3712 memset (htab->splt->contents + sizeof (elf_i386_pic_plt0_entry),
3713 htab->plt0_pad_byte,
3714 PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
3718 memcpy (htab->splt->contents, elf_i386_plt0_entry,
3719 sizeof(elf_i386_plt0_entry));
3720 memset (htab->splt->contents + sizeof (elf_i386_plt0_entry),
3721 htab->plt0_pad_byte,
3722 PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
3723 bfd_put_32 (output_bfd,
3724 (htab->sgotplt->output_section->vma
3725 + htab->sgotplt->output_offset
3727 htab->splt->contents + 2);
3728 bfd_put_32 (output_bfd,
3729 (htab->sgotplt->output_section->vma
3730 + htab->sgotplt->output_offset
3732 htab->splt->contents + 8);
3734 if (htab->is_vxworks)
3736 Elf_Internal_Rela rel;
3738 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3739 On IA32 we use REL relocations so the addend goes in
3740 the PLT directly. */
3741 rel.r_offset = (htab->splt->output_section->vma
3742 + htab->splt->output_offset
3744 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3745 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3746 htab->srelplt2->contents);
3747 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3748 rel.r_offset = (htab->splt->output_section->vma
3749 + htab->splt->output_offset
3751 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3752 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3753 htab->srelplt2->contents +
3754 sizeof (Elf32_External_Rel));
3758 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3759 really seem like the right value. */
3760 elf_section_data (htab->splt->output_section)
3761 ->this_hdr.sh_entsize = 4;
3763 /* Correct the .rel.plt.unloaded relocations. */
3764 if (htab->is_vxworks && !info->shared)
3766 int num_plts = (htab->splt->size / PLT_ENTRY_SIZE) - 1;
3769 p = htab->srelplt2->contents;
3771 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
3773 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
3775 for (; num_plts; num_plts--)
3777 Elf_Internal_Rela rel;
3778 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3779 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3780 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3781 p += sizeof (Elf32_External_Rel);
3783 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3784 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
3785 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3786 p += sizeof (Elf32_External_Rel);
3794 /* Fill in the first three entries in the global offset table. */
3795 if (htab->sgotplt->size > 0)
3797 bfd_put_32 (output_bfd,
3799 : sdyn->output_section->vma + sdyn->output_offset),
3800 htab->sgotplt->contents);
3801 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
3802 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
3805 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
3808 if (htab->sgot && htab->sgot->size > 0)
3809 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3814 /* Return address for Ith PLT stub in section PLT, for relocation REL
3815 or (bfd_vma) -1 if it should not be included. */
3818 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
3819 const arelent *rel ATTRIBUTE_UNUSED)
3821 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
3824 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
3827 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
3829 if (h->plt.offset != (bfd_vma) -1
3831 && !h->pointer_equality_needed)
3834 return _bfd_elf_hash_symbol (h);
3837 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3838 #define TARGET_LITTLE_NAME "elf32-i386"
3839 #define ELF_ARCH bfd_arch_i386
3840 #define ELF_MACHINE_CODE EM_386
3841 #define ELF_MAXPAGESIZE 0x1000
3843 #define elf_backend_can_gc_sections 1
3844 #define elf_backend_can_refcount 1
3845 #define elf_backend_want_got_plt 1
3846 #define elf_backend_plt_readonly 1
3847 #define elf_backend_want_plt_sym 0
3848 #define elf_backend_got_header_size 12
3850 /* Support RELA for objdump of prelink objects. */
3851 #define elf_info_to_howto elf_i386_info_to_howto_rel
3852 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3854 #define bfd_elf32_mkobject elf_i386_mkobject
3856 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3857 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3858 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3860 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3861 #define elf_backend_check_relocs elf_i386_check_relocs
3862 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
3863 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
3864 #define elf_backend_fake_sections elf_i386_fake_sections
3865 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3866 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3867 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3868 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
3869 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
3870 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
3871 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
3872 #define elf_backend_relocate_section elf_i386_relocate_section
3873 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
3874 #define elf_backend_always_size_sections elf_i386_always_size_sections
3875 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
3876 #define elf_backend_hash_symbol elf_i386_hash_symbol
3878 #include "elf32-target.h"
3880 /* FreeBSD support. */
3882 #undef TARGET_LITTLE_SYM
3883 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3884 #undef TARGET_LITTLE_NAME
3885 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3887 /* The kernel recognizes executables as valid only if they carry a
3888 "FreeBSD" label in the ELF header. So we put this label on all
3889 executables and (for simplicity) also all other object files. */
3892 elf_i386_post_process_headers (bfd *abfd,
3893 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3895 Elf_Internal_Ehdr *i_ehdrp;
3897 i_ehdrp = elf_elfheader (abfd);
3899 /* Put an ABI label supported by FreeBSD >= 4.1. */
3900 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
3901 #ifdef OLD_FREEBSD_ABI_LABEL
3902 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3903 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
3907 #undef elf_backend_post_process_headers
3908 #define elf_backend_post_process_headers elf_i386_post_process_headers
3910 #define elf32_bed elf32_i386_fbsd_bed
3912 #include "elf32-target.h"
3914 /* VxWorks support. */
3916 #undef TARGET_LITTLE_SYM
3917 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
3918 #undef TARGET_LITTLE_NAME
3919 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
3922 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
3924 static struct bfd_link_hash_table *
3925 elf_i386_vxworks_link_hash_table_create (bfd *abfd)
3927 struct bfd_link_hash_table *ret;
3928 struct elf_i386_link_hash_table *htab;
3930 ret = elf_i386_link_hash_table_create (abfd);
3933 htab = (struct elf_i386_link_hash_table *) ret;
3934 htab->is_vxworks = 1;
3935 htab->plt0_pad_byte = 0x90;
3942 #undef elf_backend_post_process_headers
3943 #undef bfd_elf32_bfd_link_hash_table_create
3944 #define bfd_elf32_bfd_link_hash_table_create \
3945 elf_i386_vxworks_link_hash_table_create
3946 #undef elf_backend_add_symbol_hook
3947 #define elf_backend_add_symbol_hook \
3948 elf_vxworks_add_symbol_hook
3949 #undef elf_backend_link_output_symbol_hook
3950 #define elf_backend_link_output_symbol_hook \
3951 elf_vxworks_link_output_symbol_hook
3952 #undef elf_backend_emit_relocs
3953 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
3954 #undef elf_backend_final_write_processing
3955 #define elf_backend_final_write_processing \
3956 elf_vxworks_final_write_processing
3958 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
3960 #undef elf_backend_want_plt_sym
3961 #define elf_backend_want_plt_sym 1
3964 #define elf32_bed elf32_i386_vxworks_bed
3966 #include "elf32-target.h"