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, 2007 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];
333 static reloc_howto_type *
334 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
339 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
340 if (elf_howto_table[i].name != NULL
341 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
342 return &elf_howto_table[i];
348 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
350 Elf_Internal_Rela *dst)
352 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
355 if ((indx = r_type) >= R_386_standard
356 && ((indx = r_type - R_386_ext_offset) - R_386_standard
357 >= R_386_ext - R_386_standard)
358 && ((indx = r_type - R_386_tls_offset) - R_386_ext
359 >= R_386_tls - R_386_ext)
360 && ((indx = r_type - R_386_vt_offset) - R_386_tls
361 >= R_386_vt - R_386_tls))
363 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
367 cache_ptr->howto = &elf_howto_table[indx];
370 /* Return whether a symbol name implies a local label. The UnixWare
371 2.1 cc generates temporary symbols that start with .X, so we
372 recognize them here. FIXME: do other SVR4 compilers also use .X?.
373 If so, we should move the .X recognition into
374 _bfd_elf_is_local_label_name. */
377 elf_i386_is_local_label_name (bfd *abfd, const char *name)
379 if (name[0] == '.' && name[1] == 'X')
382 return _bfd_elf_is_local_label_name (abfd, name);
385 /* Support for core dump NOTE sections. */
388 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
393 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
395 int pr_version = bfd_get_32 (abfd, note->descdata);
401 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
404 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
408 size = bfd_get_32 (abfd, note->descdata + 8);
412 switch (note->descsz)
417 case 144: /* Linux/i386 */
419 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
422 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
432 /* Make a ".reg/999" section. */
433 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
434 size, note->descpos + offset);
438 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
440 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
442 int pr_version = bfd_get_32 (abfd, note->descdata);
447 elf_tdata (abfd)->core_program
448 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
449 elf_tdata (abfd)->core_command
450 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
454 switch (note->descsz)
459 case 124: /* Linux/i386 elf_prpsinfo. */
460 elf_tdata (abfd)->core_program
461 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
462 elf_tdata (abfd)->core_command
463 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
467 /* Note that for some reason, a spurious space is tacked
468 onto the end of the args in some (at least one anyway)
469 implementations, so strip it off if it exists. */
471 char *command = elf_tdata (abfd)->core_command;
472 int n = strlen (command);
474 if (0 < n && command[n - 1] == ' ')
475 command[n - 1] = '\0';
481 /* Functions for the i386 ELF linker.
483 In order to gain some understanding of code in this file without
484 knowing all the intricate details of the linker, note the
487 Functions named elf_i386_* are called by external routines, other
488 functions are only called locally. elf_i386_* functions appear
489 in this file more or less in the order in which they are called
490 from external routines. eg. elf_i386_check_relocs is called
491 early in the link process, elf_i386_finish_dynamic_sections is
492 one of the last functions. */
495 /* The name of the dynamic interpreter. This is put in the .interp
498 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
500 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
501 copying dynamic variables from a shared lib into an app's dynbss
502 section, and instead use a dynamic relocation to point into the
504 #define ELIMINATE_COPY_RELOCS 1
506 /* The size in bytes of an entry in the procedure linkage table. */
508 #define PLT_ENTRY_SIZE 16
510 /* The first entry in an absolute procedure linkage table looks like
511 this. See the SVR4 ABI i386 supplement to see how this works.
512 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
514 static const bfd_byte elf_i386_plt0_entry[12] =
516 0xff, 0x35, /* pushl contents of address */
517 0, 0, 0, 0, /* replaced with address of .got + 4. */
518 0xff, 0x25, /* jmp indirect */
519 0, 0, 0, 0 /* replaced with address of .got + 8. */
522 /* Subsequent entries in an absolute procedure linkage table look like
525 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
527 0xff, 0x25, /* jmp indirect */
528 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
529 0x68, /* pushl immediate */
530 0, 0, 0, 0, /* replaced with offset into relocation table. */
531 0xe9, /* jmp relative */
532 0, 0, 0, 0 /* replaced with offset to start of .plt. */
535 /* The first entry in a PIC procedure linkage table look like this.
536 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
538 static const bfd_byte elf_i386_pic_plt0_entry[12] =
540 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
541 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
544 /* Subsequent entries in a PIC procedure linkage table look like this. */
546 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
548 0xff, 0xa3, /* jmp *offset(%ebx) */
549 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
550 0x68, /* pushl immediate */
551 0, 0, 0, 0, /* replaced with offset into relocation table. */
552 0xe9, /* jmp relative */
553 0, 0, 0, 0 /* replaced with offset to start of .plt. */
556 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
557 for the PLTResolve stub and then for each PLT entry. */
558 #define PLTRESOLVE_RELOCS_SHLIB 0
559 #define PLTRESOLVE_RELOCS 2
560 #define PLT_NON_JUMP_SLOT_RELOCS 2
562 /* The i386 linker needs to keep track of the number of relocs that it
563 decides to copy as dynamic relocs in check_relocs for each symbol.
564 This is so that it can later discard them if they are found to be
565 unnecessary. We store the information in a field extending the
566 regular ELF linker hash table. */
568 struct elf_i386_dyn_relocs
570 struct elf_i386_dyn_relocs *next;
572 /* The input section of the reloc. */
575 /* Total number of relocs copied for the input section. */
578 /* Number of pc-relative relocs copied for the input section. */
579 bfd_size_type pc_count;
582 /* i386 ELF linker hash entry. */
584 struct elf_i386_link_hash_entry
586 struct elf_link_hash_entry elf;
588 /* Track dynamic relocs copied for this symbol. */
589 struct elf_i386_dyn_relocs *dyn_relocs;
591 #define GOT_UNKNOWN 0
595 #define GOT_TLS_IE_POS 5
596 #define GOT_TLS_IE_NEG 6
597 #define GOT_TLS_IE_BOTH 7
598 #define GOT_TLS_GDESC 8
599 #define GOT_TLS_GD_BOTH_P(type) \
600 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
601 #define GOT_TLS_GD_P(type) \
602 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
603 #define GOT_TLS_GDESC_P(type) \
604 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
605 #define GOT_TLS_GD_ANY_P(type) \
606 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
607 unsigned char tls_type;
609 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
610 starting at the end of the jump table. */
614 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
616 struct elf_i386_obj_tdata
618 struct elf_obj_tdata root;
620 /* tls_type for each local got entry. */
621 char *local_got_tls_type;
623 /* GOTPLT entries for TLS descriptors. */
624 bfd_vma *local_tlsdesc_gotent;
627 #define elf_i386_tdata(abfd) \
628 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
630 #define elf_i386_local_got_tls_type(abfd) \
631 (elf_i386_tdata (abfd)->local_got_tls_type)
633 #define elf_i386_local_tlsdesc_gotent(abfd) \
634 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
637 elf_i386_mkobject (bfd *abfd)
639 if (abfd->tdata.any == NULL)
641 bfd_size_type amt = sizeof (struct elf_i386_obj_tdata);
642 abfd->tdata.any = bfd_zalloc (abfd, amt);
643 if (abfd->tdata.any == NULL)
646 return bfd_elf_mkobject (abfd);
649 /* i386 ELF linker hash table. */
651 struct elf_i386_link_hash_table
653 struct elf_link_hash_table elf;
655 /* Short-cuts to get to dynamic linker sections. */
664 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
667 /* True if the target system is VxWorks. */
670 /* Value used to fill the last word of the first plt entry. */
671 bfd_byte plt0_pad_byte;
673 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
674 bfd_vma next_tls_desc_index;
677 bfd_signed_vma refcount;
681 /* The amount of space used by the reserved portion of the sgotplt
682 section, plus whatever space is used by the jump slots. */
683 bfd_vma sgotplt_jump_table_size;
685 /* Small local sym to section mapping cache. */
686 struct sym_sec_cache sym_sec;
689 /* Get the i386 ELF linker hash table from a link_info structure. */
691 #define elf_i386_hash_table(p) \
692 ((struct elf_i386_link_hash_table *) ((p)->hash))
694 #define elf_i386_compute_jump_table_size(htab) \
695 ((htab)->next_tls_desc_index * 4)
697 /* Create an entry in an i386 ELF linker hash table. */
699 static struct bfd_hash_entry *
700 link_hash_newfunc (struct bfd_hash_entry *entry,
701 struct bfd_hash_table *table,
704 /* Allocate the structure if it has not already been allocated by a
708 entry = bfd_hash_allocate (table,
709 sizeof (struct elf_i386_link_hash_entry));
714 /* Call the allocation method of the superclass. */
715 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
718 struct elf_i386_link_hash_entry *eh;
720 eh = (struct elf_i386_link_hash_entry *) entry;
721 eh->dyn_relocs = NULL;
722 eh->tls_type = GOT_UNKNOWN;
723 eh->tlsdesc_got = (bfd_vma) -1;
729 /* Create an i386 ELF linker hash table. */
731 static struct bfd_link_hash_table *
732 elf_i386_link_hash_table_create (bfd *abfd)
734 struct elf_i386_link_hash_table *ret;
735 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
737 ret = bfd_malloc (amt);
741 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
742 sizeof (struct elf_i386_link_hash_entry)))
755 ret->tls_ldm_got.refcount = 0;
756 ret->next_tls_desc_index = 0;
757 ret->sgotplt_jump_table_size = 0;
758 ret->sym_sec.abfd = NULL;
760 ret->srelplt2 = NULL;
761 ret->plt0_pad_byte = 0;
763 return &ret->elf.root;
766 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
767 shortcuts to them in our hash table. */
770 create_got_section (bfd *dynobj, struct bfd_link_info *info)
772 struct elf_i386_link_hash_table *htab;
774 if (! _bfd_elf_create_got_section (dynobj, info))
777 htab = elf_i386_hash_table (info);
778 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
779 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
780 if (!htab->sgot || !htab->sgotplt)
783 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got",
784 (SEC_ALLOC | SEC_LOAD
789 if (htab->srelgot == NULL
790 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
795 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
796 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
800 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
802 struct elf_i386_link_hash_table *htab;
804 htab = elf_i386_hash_table (info);
805 if (!htab->sgot && !create_got_section (dynobj, info))
808 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
811 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
812 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
813 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
815 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
817 if (!htab->splt || !htab->srelplt || !htab->sdynbss
818 || (!info->shared && !htab->srelbss))
822 && !elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
828 /* Copy the extra info we tack onto an elf_link_hash_entry. */
831 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
832 struct elf_link_hash_entry *dir,
833 struct elf_link_hash_entry *ind)
835 struct elf_i386_link_hash_entry *edir, *eind;
837 edir = (struct elf_i386_link_hash_entry *) dir;
838 eind = (struct elf_i386_link_hash_entry *) ind;
840 if (eind->dyn_relocs != NULL)
842 if (edir->dyn_relocs != NULL)
844 struct elf_i386_dyn_relocs **pp;
845 struct elf_i386_dyn_relocs *p;
847 /* Add reloc counts against the indirect sym to the direct sym
848 list. Merge any entries against the same section. */
849 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
851 struct elf_i386_dyn_relocs *q;
853 for (q = edir->dyn_relocs; q != NULL; q = q->next)
854 if (q->sec == p->sec)
856 q->pc_count += p->pc_count;
857 q->count += p->count;
864 *pp = edir->dyn_relocs;
867 edir->dyn_relocs = eind->dyn_relocs;
868 eind->dyn_relocs = NULL;
871 if (ind->root.type == bfd_link_hash_indirect
872 && dir->got.refcount <= 0)
874 edir->tls_type = eind->tls_type;
875 eind->tls_type = GOT_UNKNOWN;
878 if (ELIMINATE_COPY_RELOCS
879 && ind->root.type != bfd_link_hash_indirect
880 && dir->dynamic_adjusted)
882 /* If called to transfer flags for a weakdef during processing
883 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
884 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
885 dir->ref_dynamic |= ind->ref_dynamic;
886 dir->ref_regular |= ind->ref_regular;
887 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
888 dir->needs_plt |= ind->needs_plt;
889 dir->pointer_equality_needed |= ind->pointer_equality_needed;
892 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
896 elf_i386_tls_transition (struct bfd_link_info *info, int r_type, int is_local)
904 case R_386_TLS_GOTDESC:
905 case R_386_TLS_DESC_CALL:
906 case R_386_TLS_IE_32:
908 return R_386_TLS_LE_32;
909 return R_386_TLS_IE_32;
911 case R_386_TLS_GOTIE:
913 return R_386_TLS_LE_32;
916 return R_386_TLS_LE_32;
922 /* Look through the relocs for a section during the first phase, and
923 calculate needed space in the global offset table, procedure linkage
924 table, and dynamic reloc sections. */
927 elf_i386_check_relocs (bfd *abfd,
928 struct bfd_link_info *info,
930 const Elf_Internal_Rela *relocs)
932 struct elf_i386_link_hash_table *htab;
933 Elf_Internal_Shdr *symtab_hdr;
934 struct elf_link_hash_entry **sym_hashes;
935 const Elf_Internal_Rela *rel;
936 const Elf_Internal_Rela *rel_end;
939 if (info->relocatable)
942 htab = elf_i386_hash_table (info);
943 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
944 sym_hashes = elf_sym_hashes (abfd);
948 rel_end = relocs + sec->reloc_count;
949 for (rel = relocs; rel < rel_end; rel++)
952 unsigned long r_symndx;
953 struct elf_link_hash_entry *h;
955 r_symndx = ELF32_R_SYM (rel->r_info);
956 r_type = ELF32_R_TYPE (rel->r_info);
958 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
960 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
966 if (r_symndx < symtab_hdr->sh_info)
970 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
971 while (h->root.type == bfd_link_hash_indirect
972 || h->root.type == bfd_link_hash_warning)
973 h = (struct elf_link_hash_entry *) h->root.u.i.link;
976 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
981 htab->tls_ldm_got.refcount += 1;
985 /* This symbol requires a procedure linkage table entry. We
986 actually build the entry in adjust_dynamic_symbol,
987 because this might be a case of linking PIC code which is
988 never referenced by a dynamic object, in which case we
989 don't need to generate a procedure linkage table entry
992 /* If this is a local symbol, we resolve it directly without
993 creating a procedure linkage table entry. */
998 h->plt.refcount += 1;
1001 case R_386_TLS_IE_32:
1003 case R_386_TLS_GOTIE:
1005 info->flags |= DF_STATIC_TLS;
1010 case R_386_TLS_GOTDESC:
1011 case R_386_TLS_DESC_CALL:
1012 /* This symbol requires a global offset table entry. */
1014 int tls_type, old_tls_type;
1019 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1020 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1021 case R_386_TLS_GOTDESC:
1022 case R_386_TLS_DESC_CALL:
1023 tls_type = GOT_TLS_GDESC; break;
1024 case R_386_TLS_IE_32:
1025 if (ELF32_R_TYPE (rel->r_info) == r_type)
1026 tls_type = GOT_TLS_IE_NEG;
1028 /* If this is a GD->IE transition, we may use either of
1029 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1030 tls_type = GOT_TLS_IE;
1033 case R_386_TLS_GOTIE:
1034 tls_type = GOT_TLS_IE_POS; break;
1039 h->got.refcount += 1;
1040 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1044 bfd_signed_vma *local_got_refcounts;
1046 /* This is a global offset table entry for a local symbol. */
1047 local_got_refcounts = elf_local_got_refcounts (abfd);
1048 if (local_got_refcounts == NULL)
1052 size = symtab_hdr->sh_info;
1053 size *= (sizeof (bfd_signed_vma)
1054 + sizeof (bfd_vma) + sizeof(char));
1055 local_got_refcounts = bfd_zalloc (abfd, size);
1056 if (local_got_refcounts == NULL)
1058 elf_local_got_refcounts (abfd) = local_got_refcounts;
1059 elf_i386_local_tlsdesc_gotent (abfd)
1060 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1061 elf_i386_local_got_tls_type (abfd)
1062 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1064 local_got_refcounts[r_symndx] += 1;
1065 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1068 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1069 tls_type |= old_tls_type;
1070 /* If a TLS symbol is accessed using IE at least once,
1071 there is no point to use dynamic model for it. */
1072 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1073 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1074 || (tls_type & GOT_TLS_IE) == 0))
1076 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1077 tls_type = old_tls_type;
1078 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1079 && GOT_TLS_GD_ANY_P (tls_type))
1080 tls_type |= old_tls_type;
1083 (*_bfd_error_handler)
1084 (_("%B: `%s' accessed both as normal and "
1085 "thread local symbol"),
1087 h ? h->root.root.string : "<local>");
1092 if (old_tls_type != tls_type)
1095 elf_i386_hash_entry (h)->tls_type = tls_type;
1097 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1105 if (htab->sgot == NULL)
1107 if (htab->elf.dynobj == NULL)
1108 htab->elf.dynobj = abfd;
1109 if (!create_got_section (htab->elf.dynobj, info))
1112 if (r_type != R_386_TLS_IE)
1116 case R_386_TLS_LE_32:
1120 info->flags |= DF_STATIC_TLS;
1125 if (h != NULL && !info->shared)
1127 /* If this reloc is in a read-only section, we might
1128 need a copy reloc. We can't check reliably at this
1129 stage whether the section is read-only, as input
1130 sections have not yet been mapped to output sections.
1131 Tentatively set the flag for now, and correct in
1132 adjust_dynamic_symbol. */
1135 /* We may need a .plt entry if the function this reloc
1136 refers to is in a shared lib. */
1137 h->plt.refcount += 1;
1138 if (r_type != R_386_PC32)
1139 h->pointer_equality_needed = 1;
1142 /* If we are creating a shared library, and this is a reloc
1143 against a global symbol, or a non PC relative reloc
1144 against a local symbol, then we need to copy the reloc
1145 into the shared library. However, if we are linking with
1146 -Bsymbolic, we do not need to copy a reloc against a
1147 global symbol which is defined in an object we are
1148 including in the link (i.e., DEF_REGULAR is set). At
1149 this point we have not seen all the input files, so it is
1150 possible that DEF_REGULAR is not set now but will be set
1151 later (it is never cleared). In case of a weak definition,
1152 DEF_REGULAR may be cleared later by a strong definition in
1153 a shared library. We account for that possibility below by
1154 storing information in the relocs_copied field of the hash
1155 table entry. A similar situation occurs when creating
1156 shared libraries and symbol visibility changes render the
1159 If on the other hand, we are creating an executable, we
1160 may need to keep relocations for symbols satisfied by a
1161 dynamic library if we manage to avoid copy relocs for the
1164 && (sec->flags & SEC_ALLOC) != 0
1165 && (r_type != R_386_PC32
1167 && (! SYMBOLIC_BIND (info, h)
1168 || h->root.type == bfd_link_hash_defweak
1169 || !h->def_regular))))
1170 || (ELIMINATE_COPY_RELOCS
1172 && (sec->flags & SEC_ALLOC) != 0
1174 && (h->root.type == bfd_link_hash_defweak
1175 || !h->def_regular)))
1177 struct elf_i386_dyn_relocs *p;
1178 struct elf_i386_dyn_relocs **head;
1180 /* We must copy these reloc types into the output file.
1181 Create a reloc section in dynobj and make room for
1187 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1188 unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
1190 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
1194 if (! CONST_STRNEQ (name, ".rel")
1195 || strcmp (bfd_get_section_name (abfd, sec),
1198 (*_bfd_error_handler)
1199 (_("%B: bad relocation section name `%s\'"),
1203 if (htab->elf.dynobj == NULL)
1204 htab->elf.dynobj = abfd;
1206 dynobj = htab->elf.dynobj;
1207 sreloc = bfd_get_section_by_name (dynobj, name);
1212 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1213 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1214 if ((sec->flags & SEC_ALLOC) != 0)
1215 flags |= SEC_ALLOC | SEC_LOAD;
1216 sreloc = bfd_make_section_with_flags (dynobj,
1220 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1223 elf_section_data (sec)->sreloc = sreloc;
1226 /* If this is a global symbol, we count the number of
1227 relocations we need for this symbol. */
1230 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1235 /* Track dynamic relocs needed for local syms too.
1236 We really need local syms available to do this
1240 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1245 vpp = &elf_section_data (s)->local_dynrel;
1246 head = (struct elf_i386_dyn_relocs **)vpp;
1250 if (p == NULL || p->sec != sec)
1252 bfd_size_type amt = sizeof *p;
1253 p = bfd_alloc (htab->elf.dynobj, amt);
1264 if (r_type == R_386_PC32)
1269 /* This relocation describes the C++ object vtable hierarchy.
1270 Reconstruct it for later use during GC. */
1271 case R_386_GNU_VTINHERIT:
1272 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1276 /* This relocation describes which C++ vtable entries are actually
1277 used. Record for later use during GC. */
1278 case R_386_GNU_VTENTRY:
1279 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1291 /* Return the section that should be marked against GC for a given
1295 elf_i386_gc_mark_hook (asection *sec,
1296 struct bfd_link_info *info,
1297 Elf_Internal_Rela *rel,
1298 struct elf_link_hash_entry *h,
1299 Elf_Internal_Sym *sym)
1302 switch (ELF32_R_TYPE (rel->r_info))
1304 case R_386_GNU_VTINHERIT:
1305 case R_386_GNU_VTENTRY:
1309 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1312 /* Update the got entry reference counts for the section being removed. */
1315 elf_i386_gc_sweep_hook (bfd *abfd,
1316 struct bfd_link_info *info,
1318 const Elf_Internal_Rela *relocs)
1320 Elf_Internal_Shdr *symtab_hdr;
1321 struct elf_link_hash_entry **sym_hashes;
1322 bfd_signed_vma *local_got_refcounts;
1323 const Elf_Internal_Rela *rel, *relend;
1325 elf_section_data (sec)->local_dynrel = NULL;
1327 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1328 sym_hashes = elf_sym_hashes (abfd);
1329 local_got_refcounts = elf_local_got_refcounts (abfd);
1331 relend = relocs + sec->reloc_count;
1332 for (rel = relocs; rel < relend; rel++)
1334 unsigned long r_symndx;
1335 unsigned int r_type;
1336 struct elf_link_hash_entry *h = NULL;
1338 r_symndx = ELF32_R_SYM (rel->r_info);
1339 if (r_symndx >= symtab_hdr->sh_info)
1341 struct elf_i386_link_hash_entry *eh;
1342 struct elf_i386_dyn_relocs **pp;
1343 struct elf_i386_dyn_relocs *p;
1345 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1346 while (h->root.type == bfd_link_hash_indirect
1347 || h->root.type == bfd_link_hash_warning)
1348 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1349 eh = (struct elf_i386_link_hash_entry *) h;
1351 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1354 /* Everything must go for SEC. */
1360 r_type = ELF32_R_TYPE (rel->r_info);
1361 r_type = elf_i386_tls_transition (info, r_type, h != NULL);
1365 if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1366 elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1370 case R_386_TLS_GOTDESC:
1371 case R_386_TLS_DESC_CALL:
1372 case R_386_TLS_IE_32:
1374 case R_386_TLS_GOTIE:
1378 if (h->got.refcount > 0)
1379 h->got.refcount -= 1;
1381 else if (local_got_refcounts != NULL)
1383 if (local_got_refcounts[r_symndx] > 0)
1384 local_got_refcounts[r_symndx] -= 1;
1397 if (h->plt.refcount > 0)
1398 h->plt.refcount -= 1;
1410 /* Adjust a symbol defined by a dynamic object and referenced by a
1411 regular object. The current definition is in some section of the
1412 dynamic object, but we're not including those sections. We have to
1413 change the definition to something the rest of the link can
1417 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1418 struct elf_link_hash_entry *h)
1420 struct elf_i386_link_hash_table *htab;
1423 /* If this is a function, put it in the procedure linkage table. We
1424 will fill in the contents of the procedure linkage table later,
1425 when we know the address of the .got section. */
1426 if (h->type == STT_FUNC
1429 if (h->plt.refcount <= 0
1430 || SYMBOL_CALLS_LOCAL (info, h)
1431 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1432 && h->root.type == bfd_link_hash_undefweak))
1434 /* This case can occur if we saw a PLT32 reloc in an input
1435 file, but the symbol was never referred to by a dynamic
1436 object, or if all references were garbage collected. In
1437 such a case, we don't actually need to build a procedure
1438 linkage table, and we can just do a PC32 reloc instead. */
1439 h->plt.offset = (bfd_vma) -1;
1446 /* It's possible that we incorrectly decided a .plt reloc was
1447 needed for an R_386_PC32 reloc to a non-function sym in
1448 check_relocs. We can't decide accurately between function and
1449 non-function syms in check-relocs; Objects loaded later in
1450 the link may change h->type. So fix it now. */
1451 h->plt.offset = (bfd_vma) -1;
1453 /* If this is a weak symbol, and there is a real definition, the
1454 processor independent code will have arranged for us to see the
1455 real definition first, and we can just use the same value. */
1456 if (h->u.weakdef != NULL)
1458 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1459 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1460 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1461 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1462 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1463 h->non_got_ref = h->u.weakdef->non_got_ref;
1467 /* This is a reference to a symbol defined by a dynamic object which
1468 is not a function. */
1470 /* If we are creating a shared library, we must presume that the
1471 only references to the symbol are via the global offset table.
1472 For such cases we need not do anything here; the relocations will
1473 be handled correctly by relocate_section. */
1477 /* If there are no references to this symbol that do not use the
1478 GOT, we don't need to generate a copy reloc. */
1479 if (!h->non_got_ref)
1482 /* If -z nocopyreloc was given, we won't generate them either. */
1483 if (info->nocopyreloc)
1489 htab = elf_i386_hash_table (info);
1491 /* If there aren't any dynamic relocs in read-only sections, then
1492 we can keep the dynamic relocs and avoid the copy reloc. This
1493 doesn't work on VxWorks, where we can not have dynamic relocations
1494 (other than copy and jump slot relocations) in an executable. */
1495 if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
1497 struct elf_i386_link_hash_entry * eh;
1498 struct elf_i386_dyn_relocs *p;
1500 eh = (struct elf_i386_link_hash_entry *) h;
1501 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1503 s = p->sec->output_section;
1504 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1517 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1518 h->root.root.string);
1522 /* We must allocate the symbol in our .dynbss section, which will
1523 become part of the .bss section of the executable. There will be
1524 an entry for this symbol in the .dynsym section. The dynamic
1525 object will contain position independent code, so all references
1526 from the dynamic object to this symbol will go through the global
1527 offset table. The dynamic linker will use the .dynsym entry to
1528 determine the address it must put in the global offset table, so
1529 both the dynamic object and the regular object will refer to the
1530 same memory location for the variable. */
1532 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1533 copy the initial value out of the dynamic object and into the
1534 runtime process image. */
1535 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1537 htab->srelbss->size += sizeof (Elf32_External_Rel);
1543 return _bfd_elf_adjust_dynamic_copy (h, s);
1546 /* Allocate space in .plt, .got and associated reloc sections for
1550 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1552 struct bfd_link_info *info;
1553 struct elf_i386_link_hash_table *htab;
1554 struct elf_i386_link_hash_entry *eh;
1555 struct elf_i386_dyn_relocs *p;
1557 if (h->root.type == bfd_link_hash_indirect)
1560 if (h->root.type == bfd_link_hash_warning)
1561 /* When warning symbols are created, they **replace** the "real"
1562 entry in the hash table, thus we never get to see the real
1563 symbol in a hash traversal. So look at it now. */
1564 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1566 info = (struct bfd_link_info *) inf;
1567 htab = elf_i386_hash_table (info);
1569 if (htab->elf.dynamic_sections_created
1570 && h->plt.refcount > 0)
1572 /* Make sure this symbol is output as a dynamic symbol.
1573 Undefined weak syms won't yet be marked as dynamic. */
1574 if (h->dynindx == -1
1575 && !h->forced_local)
1577 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1582 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1584 asection *s = htab->splt;
1586 /* If this is the first .plt entry, make room for the special
1589 s->size += PLT_ENTRY_SIZE;
1591 h->plt.offset = s->size;
1593 /* If this symbol is not defined in a regular file, and we are
1594 not generating a shared library, then set the symbol to this
1595 location in the .plt. This is required to make function
1596 pointers compare as equal between the normal executable and
1597 the shared library. */
1601 h->root.u.def.section = s;
1602 h->root.u.def.value = h->plt.offset;
1605 /* Make room for this entry. */
1606 s->size += PLT_ENTRY_SIZE;
1608 /* We also need to make an entry in the .got.plt section, which
1609 will be placed in the .got section by the linker script. */
1610 htab->sgotplt->size += 4;
1612 /* We also need to make an entry in the .rel.plt section. */
1613 htab->srelplt->size += sizeof (Elf32_External_Rel);
1614 htab->next_tls_desc_index++;
1616 if (htab->is_vxworks && !info->shared)
1618 /* VxWorks has a second set of relocations for each PLT entry
1619 in executables. They go in a separate relocation section,
1620 which is processed by the kernel loader. */
1622 /* There are two relocations for the initial PLT entry: an
1623 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1624 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1626 if (h->plt.offset == PLT_ENTRY_SIZE)
1627 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1629 /* There are two extra relocations for each subsequent PLT entry:
1630 an R_386_32 relocation for the GOT entry, and an R_386_32
1631 relocation for the PLT entry. */
1633 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1638 h->plt.offset = (bfd_vma) -1;
1644 h->plt.offset = (bfd_vma) -1;
1648 eh = (struct elf_i386_link_hash_entry *) h;
1649 eh->tlsdesc_got = (bfd_vma) -1;
1651 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1652 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1653 if (h->got.refcount > 0
1656 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
1657 h->got.offset = (bfd_vma) -1;
1658 else if (h->got.refcount > 0)
1662 int tls_type = elf_i386_hash_entry(h)->tls_type;
1664 /* Make sure this symbol is output as a dynamic symbol.
1665 Undefined weak syms won't yet be marked as dynamic. */
1666 if (h->dynindx == -1
1667 && !h->forced_local)
1669 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1674 if (GOT_TLS_GDESC_P (tls_type))
1676 eh->tlsdesc_got = htab->sgotplt->size
1677 - elf_i386_compute_jump_table_size (htab);
1678 htab->sgotplt->size += 8;
1679 h->got.offset = (bfd_vma) -2;
1681 if (! GOT_TLS_GDESC_P (tls_type)
1682 || GOT_TLS_GD_P (tls_type))
1684 h->got.offset = s->size;
1686 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1687 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
1690 dyn = htab->elf.dynamic_sections_created;
1691 /* R_386_TLS_IE_32 needs one dynamic relocation,
1692 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1693 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1694 need two), R_386_TLS_GD needs one if local symbol and two if
1696 if (tls_type == GOT_TLS_IE_BOTH)
1697 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
1698 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
1699 || (tls_type & GOT_TLS_IE))
1700 htab->srelgot->size += sizeof (Elf32_External_Rel);
1701 else if (GOT_TLS_GD_P (tls_type))
1702 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
1703 else if (! GOT_TLS_GDESC_P (tls_type)
1704 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1705 || h->root.type != bfd_link_hash_undefweak)
1707 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1708 htab->srelgot->size += sizeof (Elf32_External_Rel);
1709 if (GOT_TLS_GDESC_P (tls_type))
1710 htab->srelplt->size += sizeof (Elf32_External_Rel);
1713 h->got.offset = (bfd_vma) -1;
1715 if (eh->dyn_relocs == NULL)
1718 /* In the shared -Bsymbolic case, discard space allocated for
1719 dynamic pc-relative relocs against symbols which turn out to be
1720 defined in regular objects. For the normal shared case, discard
1721 space for pc-relative relocs that have become local due to symbol
1722 visibility changes. */
1726 /* The only reloc that uses pc_count is R_386_PC32, which will
1727 appear on a call or on something like ".long foo - .". We
1728 want calls to protected symbols to resolve directly to the
1729 function rather than going via the plt. If people want
1730 function pointer comparisons to work as expected then they
1731 should avoid writing assembly like ".long foo - .". */
1732 if (SYMBOL_CALLS_LOCAL (info, h))
1734 struct elf_i386_dyn_relocs **pp;
1736 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1738 p->count -= p->pc_count;
1747 /* Also discard relocs on undefined weak syms with non-default
1749 if (eh->dyn_relocs != NULL
1750 && h->root.type == bfd_link_hash_undefweak)
1752 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1753 eh->dyn_relocs = NULL;
1755 /* Make sure undefined weak symbols are output as a dynamic
1757 else if (h->dynindx == -1
1758 && !h->forced_local)
1760 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1765 else if (ELIMINATE_COPY_RELOCS)
1767 /* For the non-shared case, discard space for relocs against
1768 symbols which turn out to need copy relocs or are not
1774 || (htab->elf.dynamic_sections_created
1775 && (h->root.type == bfd_link_hash_undefweak
1776 || h->root.type == bfd_link_hash_undefined))))
1778 /* Make sure this symbol is output as a dynamic symbol.
1779 Undefined weak syms won't yet be marked as dynamic. */
1780 if (h->dynindx == -1
1781 && !h->forced_local)
1783 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1787 /* If that succeeded, we know we'll be keeping all the
1789 if (h->dynindx != -1)
1793 eh->dyn_relocs = NULL;
1798 /* Finally, allocate space. */
1799 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1801 asection *sreloc = elf_section_data (p->sec)->sreloc;
1802 sreloc->size += p->count * sizeof (Elf32_External_Rel);
1808 /* Find any dynamic relocs that apply to read-only sections. */
1811 readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
1813 struct elf_i386_link_hash_entry *eh;
1814 struct elf_i386_dyn_relocs *p;
1816 if (h->root.type == bfd_link_hash_warning)
1817 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1819 eh = (struct elf_i386_link_hash_entry *) h;
1820 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1822 asection *s = p->sec->output_section;
1824 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1826 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1828 info->flags |= DF_TEXTREL;
1830 /* Not an error, just cut short the traversal. */
1837 /* Set the sizes of the dynamic sections. */
1840 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1841 struct bfd_link_info *info)
1843 struct elf_i386_link_hash_table *htab;
1849 htab = elf_i386_hash_table (info);
1850 dynobj = htab->elf.dynobj;
1854 if (htab->elf.dynamic_sections_created)
1856 /* Set the contents of the .interp section to the interpreter. */
1857 if (info->executable)
1859 s = bfd_get_section_by_name (dynobj, ".interp");
1862 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1863 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1867 /* Set up .got offsets for local syms, and space for local dynamic
1869 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1871 bfd_signed_vma *local_got;
1872 bfd_signed_vma *end_local_got;
1873 char *local_tls_type;
1874 bfd_vma *local_tlsdesc_gotent;
1875 bfd_size_type locsymcount;
1876 Elf_Internal_Shdr *symtab_hdr;
1879 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1882 for (s = ibfd->sections; s != NULL; s = s->next)
1884 struct elf_i386_dyn_relocs *p;
1886 for (p = ((struct elf_i386_dyn_relocs *)
1887 elf_section_data (s)->local_dynrel);
1891 if (!bfd_is_abs_section (p->sec)
1892 && bfd_is_abs_section (p->sec->output_section))
1894 /* Input section has been discarded, either because
1895 it is a copy of a linkonce section or due to
1896 linker script /DISCARD/, so we'll be discarding
1899 else if (p->count != 0)
1901 srel = elf_section_data (p->sec)->sreloc;
1902 srel->size += p->count * sizeof (Elf32_External_Rel);
1903 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1904 info->flags |= DF_TEXTREL;
1909 local_got = elf_local_got_refcounts (ibfd);
1913 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
1914 locsymcount = symtab_hdr->sh_info;
1915 end_local_got = local_got + locsymcount;
1916 local_tls_type = elf_i386_local_got_tls_type (ibfd);
1917 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
1919 srel = htab->srelgot;
1920 for (; local_got < end_local_got;
1921 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
1923 *local_tlsdesc_gotent = (bfd_vma) -1;
1926 if (GOT_TLS_GDESC_P (*local_tls_type))
1928 *local_tlsdesc_gotent = htab->sgotplt->size
1929 - elf_i386_compute_jump_table_size (htab);
1930 htab->sgotplt->size += 8;
1931 *local_got = (bfd_vma) -2;
1933 if (! GOT_TLS_GDESC_P (*local_tls_type)
1934 || GOT_TLS_GD_P (*local_tls_type))
1936 *local_got = s->size;
1938 if (GOT_TLS_GD_P (*local_tls_type)
1939 || *local_tls_type == GOT_TLS_IE_BOTH)
1943 || GOT_TLS_GD_ANY_P (*local_tls_type)
1944 || (*local_tls_type & GOT_TLS_IE))
1946 if (*local_tls_type == GOT_TLS_IE_BOTH)
1947 srel->size += 2 * sizeof (Elf32_External_Rel);
1948 else if (GOT_TLS_GD_P (*local_tls_type)
1949 || ! GOT_TLS_GDESC_P (*local_tls_type))
1950 srel->size += sizeof (Elf32_External_Rel);
1951 if (GOT_TLS_GDESC_P (*local_tls_type))
1952 htab->srelplt->size += sizeof (Elf32_External_Rel);
1956 *local_got = (bfd_vma) -1;
1960 if (htab->tls_ldm_got.refcount > 0)
1962 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1964 htab->tls_ldm_got.offset = htab->sgot->size;
1965 htab->sgot->size += 8;
1966 htab->srelgot->size += sizeof (Elf32_External_Rel);
1969 htab->tls_ldm_got.offset = -1;
1971 /* Allocate global sym .plt and .got entries, and space for global
1972 sym dynamic relocs. */
1973 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
1975 /* For every jump slot reserved in the sgotplt, reloc_count is
1976 incremented. However, when we reserve space for TLS descriptors,
1977 it's not incremented, so in order to compute the space reserved
1978 for them, it suffices to multiply the reloc count by the jump
1981 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
1983 /* We now have determined the sizes of the various dynamic sections.
1984 Allocate memory for them. */
1986 for (s = dynobj->sections; s != NULL; s = s->next)
1988 bfd_boolean strip_section = TRUE;
1990 if ((s->flags & SEC_LINKER_CREATED) == 0)
1995 || s == htab->sgotplt
1996 || s == htab->sdynbss)
1998 /* Strip this section if we don't need it; see the
2000 /* We'd like to strip these sections if they aren't needed, but if
2001 we've exported dynamic symbols from them we must leave them.
2002 It's too late to tell BFD to get rid of the symbols. */
2004 if (htab->elf.hplt != NULL)
2005 strip_section = FALSE;
2007 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2009 if (s->size != 0 && s != htab->srelplt && s != htab->srelplt2)
2012 /* We use the reloc_count field as a counter if we need
2013 to copy relocs into the output file. */
2018 /* It's not one of our sections, so don't allocate space. */
2024 /* If we don't need this section, strip it from the
2025 output file. This is mostly to handle .rel.bss and
2026 .rel.plt. We must create both sections in
2027 create_dynamic_sections, because they must be created
2028 before the linker maps input sections to output
2029 sections. The linker does that before
2030 adjust_dynamic_symbol is called, and it is that
2031 function which decides whether anything needs to go
2032 into these sections. */
2034 s->flags |= SEC_EXCLUDE;
2038 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2041 /* Allocate memory for the section contents. We use bfd_zalloc
2042 here in case unused entries are not reclaimed before the
2043 section's contents are written out. This should not happen,
2044 but this way if it does, we get a R_386_NONE reloc instead
2046 s->contents = bfd_zalloc (dynobj, s->size);
2047 if (s->contents == NULL)
2051 if (htab->elf.dynamic_sections_created)
2053 /* Add some entries to the .dynamic section. We fill in the
2054 values later, in elf_i386_finish_dynamic_sections, but we
2055 must add the entries now so that we get the correct size for
2056 the .dynamic section. The DT_DEBUG entry is filled in by the
2057 dynamic linker and used by the debugger. */
2058 #define add_dynamic_entry(TAG, VAL) \
2059 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2061 if (info->executable)
2063 if (!add_dynamic_entry (DT_DEBUG, 0))
2067 if (htab->splt->size != 0)
2069 if (!add_dynamic_entry (DT_PLTGOT, 0)
2070 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2071 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2072 || !add_dynamic_entry (DT_JMPREL, 0))
2078 if (!add_dynamic_entry (DT_REL, 0)
2079 || !add_dynamic_entry (DT_RELSZ, 0)
2080 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2083 /* If any dynamic relocs apply to a read-only section,
2084 then we need a DT_TEXTREL entry. */
2085 if ((info->flags & DF_TEXTREL) == 0)
2086 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2089 if ((info->flags & DF_TEXTREL) != 0)
2091 if (!add_dynamic_entry (DT_TEXTREL, 0))
2096 #undef add_dynamic_entry
2102 elf_i386_always_size_sections (bfd *output_bfd,
2103 struct bfd_link_info *info)
2105 asection *tls_sec = elf_hash_table (info)->tls_sec;
2109 struct elf_link_hash_entry *tlsbase;
2111 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2112 "_TLS_MODULE_BASE_",
2113 FALSE, FALSE, FALSE);
2115 if (tlsbase && tlsbase->type == STT_TLS)
2117 struct bfd_link_hash_entry *bh = NULL;
2118 const struct elf_backend_data *bed
2119 = get_elf_backend_data (output_bfd);
2121 if (!(_bfd_generic_link_add_one_symbol
2122 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2123 tls_sec, 0, NULL, FALSE,
2124 bed->collect, &bh)))
2126 tlsbase = (struct elf_link_hash_entry *)bh;
2127 tlsbase->def_regular = 1;
2128 tlsbase->other = STV_HIDDEN;
2129 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2136 /* Set the correct type for an x86 ELF section. We do this by the
2137 section name, which is a hack, but ought to work. */
2140 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2141 Elf_Internal_Shdr *hdr,
2144 register const char *name;
2146 name = bfd_get_section_name (abfd, sec);
2148 /* This is an ugly, but unfortunately necessary hack that is
2149 needed when producing EFI binaries on x86. It tells
2150 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2151 containing ELF relocation info. We need this hack in order to
2152 be able to generate ELF binaries that can be translated into
2153 EFI applications (which are essentially COFF objects). Those
2154 files contain a COFF ".reloc" section inside an ELFNN object,
2155 which would normally cause BFD to segfault because it would
2156 attempt to interpret this section as containing relocation
2157 entries for section "oc". With this hack enabled, ".reloc"
2158 will be treated as a normal data section, which will avoid the
2159 segfault. However, you won't be able to create an ELFNN binary
2160 with a section named "oc" that needs relocations, but that's
2161 the kind of ugly side-effects you get when detecting section
2162 types based on their names... In practice, this limitation is
2163 unlikely to bite. */
2164 if (strcmp (name, ".reloc") == 0)
2165 hdr->sh_type = SHT_PROGBITS;
2170 /* Return the base VMA address which should be subtracted from real addresses
2171 when resolving @dtpoff relocation.
2172 This is PT_TLS segment p_vaddr. */
2175 dtpoff_base (struct bfd_link_info *info)
2177 /* If tls_sec is NULL, we should have signalled an error already. */
2178 if (elf_hash_table (info)->tls_sec == NULL)
2180 return elf_hash_table (info)->tls_sec->vma;
2183 /* Return the relocation value for @tpoff relocation
2184 if STT_TLS virtual address is ADDRESS. */
2187 tpoff (struct bfd_link_info *info, bfd_vma address)
2189 struct elf_link_hash_table *htab = elf_hash_table (info);
2191 /* If tls_sec is NULL, we should have signalled an error already. */
2192 if (htab->tls_sec == NULL)
2194 return htab->tls_size + htab->tls_sec->vma - address;
2197 /* Relocate an i386 ELF section. */
2200 elf_i386_relocate_section (bfd *output_bfd,
2201 struct bfd_link_info *info,
2203 asection *input_section,
2205 Elf_Internal_Rela *relocs,
2206 Elf_Internal_Sym *local_syms,
2207 asection **local_sections)
2209 struct elf_i386_link_hash_table *htab;
2210 Elf_Internal_Shdr *symtab_hdr;
2211 struct elf_link_hash_entry **sym_hashes;
2212 bfd_vma *local_got_offsets;
2213 bfd_vma *local_tlsdesc_gotents;
2214 Elf_Internal_Rela *rel;
2215 Elf_Internal_Rela *relend;
2217 htab = elf_i386_hash_table (info);
2218 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2219 sym_hashes = elf_sym_hashes (input_bfd);
2220 local_got_offsets = elf_local_got_offsets (input_bfd);
2221 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
2224 relend = relocs + input_section->reloc_count;
2225 for (; rel < relend; rel++)
2227 unsigned int r_type;
2228 reloc_howto_type *howto;
2229 unsigned long r_symndx;
2230 struct elf_link_hash_entry *h;
2231 Elf_Internal_Sym *sym;
2233 bfd_vma off, offplt;
2235 bfd_boolean unresolved_reloc;
2236 bfd_reloc_status_type r;
2240 r_type = ELF32_R_TYPE (rel->r_info);
2241 if (r_type == R_386_GNU_VTINHERIT
2242 || r_type == R_386_GNU_VTENTRY)
2245 if ((indx = r_type) >= R_386_standard
2246 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2247 >= R_386_ext - R_386_standard)
2248 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2249 >= R_386_tls - R_386_ext))
2251 (*_bfd_error_handler)
2252 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2253 input_bfd, input_section, r_type);
2254 bfd_set_error (bfd_error_bad_value);
2257 howto = elf_howto_table + indx;
2259 r_symndx = ELF32_R_SYM (rel->r_info);
2263 unresolved_reloc = FALSE;
2264 if (r_symndx < symtab_hdr->sh_info)
2266 sym = local_syms + r_symndx;
2267 sec = local_sections[r_symndx];
2268 relocation = (sec->output_section->vma
2269 + sec->output_offset
2272 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2273 && ((sec->flags & SEC_MERGE) != 0
2274 || (info->relocatable
2275 && sec->output_offset != 0)))
2278 bfd_byte *where = contents + rel->r_offset;
2280 switch (howto->size)
2283 addend = bfd_get_8 (input_bfd, where);
2284 if (howto->pc_relative)
2286 addend = (addend ^ 0x80) - 0x80;
2291 addend = bfd_get_16 (input_bfd, where);
2292 if (howto->pc_relative)
2294 addend = (addend ^ 0x8000) - 0x8000;
2299 addend = bfd_get_32 (input_bfd, where);
2300 if (howto->pc_relative)
2302 addend = (addend ^ 0x80000000) - 0x80000000;
2310 if (info->relocatable)
2311 addend += sec->output_offset;
2314 asection *msec = sec;
2315 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2317 addend -= relocation;
2318 addend += msec->output_section->vma + msec->output_offset;
2321 switch (howto->size)
2324 /* FIXME: overflow checks. */
2325 if (howto->pc_relative)
2327 bfd_put_8 (input_bfd, addend, where);
2330 if (howto->pc_relative)
2332 bfd_put_16 (input_bfd, addend, where);
2335 if (howto->pc_relative)
2337 bfd_put_32 (input_bfd, addend, where);
2346 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2347 r_symndx, symtab_hdr, sym_hashes,
2349 unresolved_reloc, warned);
2352 if (sec != NULL && elf_discarded_section (sec))
2354 /* For relocs against symbols from removed linkonce sections,
2355 or sections discarded by a linker script, we just want the
2356 section contents zeroed. Avoid any special processing. */
2357 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2363 if (info->relocatable)
2369 /* Relocation is to the entry for this symbol in the global
2371 if (htab->sgot == NULL)
2378 off = h->got.offset;
2379 dyn = htab->elf.dynamic_sections_created;
2380 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2382 && SYMBOL_REFERENCES_LOCAL (info, h))
2383 || (ELF_ST_VISIBILITY (h->other)
2384 && h->root.type == bfd_link_hash_undefweak))
2386 /* This is actually a static link, or it is a
2387 -Bsymbolic link and the symbol is defined
2388 locally, or the symbol was forced to be local
2389 because of a version file. We must initialize
2390 this entry in the global offset table. Since the
2391 offset must always be a multiple of 4, we use the
2392 least significant bit to record whether we have
2393 initialized it already.
2395 When doing a dynamic link, we create a .rel.got
2396 relocation entry to initialize the value. This
2397 is done in the finish_dynamic_symbol routine. */
2402 bfd_put_32 (output_bfd, relocation,
2403 htab->sgot->contents + off);
2408 unresolved_reloc = FALSE;
2412 if (local_got_offsets == NULL)
2415 off = local_got_offsets[r_symndx];
2417 /* The offset must always be a multiple of 4. We use
2418 the least significant bit to record whether we have
2419 already generated the necessary reloc. */
2424 bfd_put_32 (output_bfd, relocation,
2425 htab->sgot->contents + off);
2430 Elf_Internal_Rela outrel;
2437 outrel.r_offset = (htab->sgot->output_section->vma
2438 + htab->sgot->output_offset
2440 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2442 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
2443 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2446 local_got_offsets[r_symndx] |= 1;
2450 if (off >= (bfd_vma) -2)
2453 relocation = htab->sgot->output_section->vma
2454 + htab->sgot->output_offset + off
2455 - htab->sgotplt->output_section->vma
2456 - htab->sgotplt->output_offset;
2460 /* Relocation is relative to the start of the global offset
2463 /* Check to make sure it isn't a protected function symbol
2464 for shared library since it may not be local when used
2465 as function address. */
2467 && !info->executable
2470 && h->type == STT_FUNC
2471 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2473 (*_bfd_error_handler)
2474 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2475 input_bfd, h->root.root.string);
2476 bfd_set_error (bfd_error_bad_value);
2480 /* Note that sgot is not involved in this
2481 calculation. We always want the start of .got.plt. If we
2482 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2483 permitted by the ABI, we might have to change this
2485 relocation -= htab->sgotplt->output_section->vma
2486 + htab->sgotplt->output_offset;
2490 /* Use global offset table as symbol value. */
2491 relocation = htab->sgotplt->output_section->vma
2492 + htab->sgotplt->output_offset;
2493 unresolved_reloc = FALSE;
2497 /* Relocation is to the entry for this symbol in the
2498 procedure linkage table. */
2500 /* Resolve a PLT32 reloc against a local symbol directly,
2501 without using the procedure linkage table. */
2505 if (h->plt.offset == (bfd_vma) -1
2506 || htab->splt == NULL)
2508 /* We didn't make a PLT entry for this symbol. This
2509 happens when statically linking PIC code, or when
2510 using -Bsymbolic. */
2514 relocation = (htab->splt->output_section->vma
2515 + htab->splt->output_offset
2517 unresolved_reloc = FALSE;
2522 if ((input_section->flags & SEC_ALLOC) == 0)
2527 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2528 || h->root.type != bfd_link_hash_undefweak)
2529 && (r_type != R_386_PC32
2530 || !SYMBOL_CALLS_LOCAL (info, h)))
2531 || (ELIMINATE_COPY_RELOCS
2538 || h->root.type == bfd_link_hash_undefweak
2539 || h->root.type == bfd_link_hash_undefined)))
2541 Elf_Internal_Rela outrel;
2543 bfd_boolean skip, relocate;
2546 /* When generating a shared object, these relocations
2547 are copied into the output file to be resolved at run
2554 _bfd_elf_section_offset (output_bfd, info, input_section,
2556 if (outrel.r_offset == (bfd_vma) -1)
2558 else if (outrel.r_offset == (bfd_vma) -2)
2559 skip = TRUE, relocate = TRUE;
2560 outrel.r_offset += (input_section->output_section->vma
2561 + input_section->output_offset);
2564 memset (&outrel, 0, sizeof outrel);
2567 && (r_type == R_386_PC32
2569 || !SYMBOLIC_BIND (info, h)
2570 || !h->def_regular))
2571 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2574 /* This symbol is local, or marked to become local. */
2576 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2579 sreloc = elf_section_data (input_section)->sreloc;
2583 loc = sreloc->contents;
2584 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2585 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2587 /* If this reloc is against an external symbol, we do
2588 not want to fiddle with the addend. Otherwise, we
2589 need to include the symbol value so that it becomes
2590 an addend for the dynamic reloc. */
2599 Elf_Internal_Rela outrel;
2603 outrel.r_offset = rel->r_offset
2604 + input_section->output_section->vma
2605 + input_section->output_offset;
2606 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2607 sreloc = elf_section_data (input_section)->sreloc;
2610 loc = sreloc->contents;
2611 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2612 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2617 case R_386_TLS_GOTDESC:
2618 case R_386_TLS_DESC_CALL:
2619 case R_386_TLS_IE_32:
2620 case R_386_TLS_GOTIE:
2621 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
2622 tls_type = GOT_UNKNOWN;
2623 if (h == NULL && local_got_offsets)
2624 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
2627 tls_type = elf_i386_hash_entry(h)->tls_type;
2628 if (!info->shared && h->dynindx == -1 && (tls_type & GOT_TLS_IE))
2629 r_type = R_386_TLS_LE_32;
2631 if (tls_type == GOT_TLS_IE)
2632 tls_type = GOT_TLS_IE_NEG;
2633 if (r_type == R_386_TLS_GD
2634 || r_type == R_386_TLS_GOTDESC
2635 || r_type == R_386_TLS_DESC_CALL)
2637 if (tls_type == GOT_TLS_IE_POS)
2638 r_type = R_386_TLS_GOTIE;
2639 else if (tls_type & GOT_TLS_IE)
2640 r_type = R_386_TLS_IE_32;
2643 if (r_type == R_386_TLS_LE_32)
2645 BFD_ASSERT (! unresolved_reloc);
2646 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
2648 unsigned int val, type;
2651 /* GD->LE transition. */
2652 BFD_ASSERT (rel->r_offset >= 2);
2653 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2654 BFD_ASSERT (type == 0x8d || type == 0x04);
2655 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
2656 BFD_ASSERT (bfd_get_8 (input_bfd,
2657 contents + rel->r_offset + 4)
2659 BFD_ASSERT (rel + 1 < relend);
2660 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2661 roff = rel->r_offset + 5;
2662 val = bfd_get_8 (input_bfd,
2663 contents + rel->r_offset - 1);
2666 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2668 movl %gs:0, %eax; subl $foo@tpoff, %eax
2669 (6 byte form of subl). */
2670 BFD_ASSERT (rel->r_offset >= 3);
2671 BFD_ASSERT (bfd_get_8 (input_bfd,
2672 contents + rel->r_offset - 3)
2674 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2675 memcpy (contents + rel->r_offset - 3,
2676 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2680 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
2681 if (rel->r_offset + 10 <= input_section->size
2682 && bfd_get_8 (input_bfd,
2683 contents + rel->r_offset + 9) == 0x90)
2685 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2687 movl %gs:0, %eax; subl $foo@tpoff, %eax
2688 (6 byte form of subl). */
2689 memcpy (contents + rel->r_offset - 2,
2690 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2691 roff = rel->r_offset + 6;
2695 /* leal foo(%reg), %eax; call ___tls_get_addr
2697 movl %gs:0, %eax; subl $foo@tpoff, %eax
2698 (5 byte form of subl). */
2699 memcpy (contents + rel->r_offset - 2,
2700 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2703 bfd_put_32 (output_bfd, tpoff (info, relocation),
2705 /* Skip R_386_PLT32. */
2709 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
2711 /* GDesc -> LE transition.
2712 It's originally something like:
2713 leal x@tlsdesc(%ebx), %eax
2717 Registers other than %eax may be set up here. */
2719 unsigned int val, type;
2722 /* First, make sure it's a leal adding ebx to a
2723 32-bit offset into any register, although it's
2724 probably almost always going to be eax. */
2725 roff = rel->r_offset;
2726 BFD_ASSERT (roff >= 2);
2727 type = bfd_get_8 (input_bfd, contents + roff - 2);
2728 BFD_ASSERT (type == 0x8d);
2729 val = bfd_get_8 (input_bfd, contents + roff - 1);
2730 BFD_ASSERT ((val & 0xc7) == 0x83);
2731 BFD_ASSERT (roff + 4 <= input_section->size);
2733 /* Now modify the instruction as appropriate. */
2734 /* aoliva FIXME: remove the above and xor the byte
2736 bfd_put_8 (output_bfd, val ^ 0x86,
2737 contents + roff - 1);
2738 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2742 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
2744 /* GDesc -> LE transition.
2750 unsigned int val, type;
2753 /* First, make sure it's a call *(%eax). */
2754 roff = rel->r_offset;
2755 BFD_ASSERT (roff + 2 <= input_section->size);
2756 type = bfd_get_8 (input_bfd, contents + roff);
2757 BFD_ASSERT (type == 0xff);
2758 val = bfd_get_8 (input_bfd, contents + roff + 1);
2759 BFD_ASSERT (val == 0x10);
2761 /* Now modify the instruction as appropriate. Use
2762 xchg %ax,%ax instead of 2 nops. */
2763 bfd_put_8 (output_bfd, 0x66, contents + roff);
2764 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2767 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
2769 unsigned int val, type;
2771 /* IE->LE transition:
2772 Originally it can be one of:
2780 BFD_ASSERT (rel->r_offset >= 1);
2781 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2782 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
2785 /* movl foo, %eax. */
2786 bfd_put_8 (output_bfd, 0xb8,
2787 contents + rel->r_offset - 1);
2791 BFD_ASSERT (rel->r_offset >= 2);
2792 type = bfd_get_8 (input_bfd,
2793 contents + rel->r_offset - 2);
2798 BFD_ASSERT ((val & 0xc7) == 0x05);
2799 bfd_put_8 (output_bfd, 0xc7,
2800 contents + rel->r_offset - 2);
2801 bfd_put_8 (output_bfd,
2802 0xc0 | ((val >> 3) & 7),
2803 contents + rel->r_offset - 1);
2807 BFD_ASSERT ((val & 0xc7) == 0x05);
2808 bfd_put_8 (output_bfd, 0x81,
2809 contents + rel->r_offset - 2);
2810 bfd_put_8 (output_bfd,
2811 0xc0 | ((val >> 3) & 7),
2812 contents + rel->r_offset - 1);
2819 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2820 contents + rel->r_offset);
2825 unsigned int val, type;
2827 /* {IE_32,GOTIE}->LE transition:
2828 Originally it can be one of:
2829 subl foo(%reg1), %reg2
2830 movl foo(%reg1), %reg2
2831 addl foo(%reg1), %reg2
2834 movl $foo, %reg2 (6 byte form)
2835 addl $foo, %reg2. */
2836 BFD_ASSERT (rel->r_offset >= 2);
2837 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2838 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
2839 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
2840 BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4);
2844 bfd_put_8 (output_bfd, 0xc7,
2845 contents + rel->r_offset - 2);
2846 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2847 contents + rel->r_offset - 1);
2849 else if (type == 0x2b)
2852 bfd_put_8 (output_bfd, 0x81,
2853 contents + rel->r_offset - 2);
2854 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2855 contents + rel->r_offset - 1);
2857 else if (type == 0x03)
2860 bfd_put_8 (output_bfd, 0x81,
2861 contents + rel->r_offset - 2);
2862 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2863 contents + rel->r_offset - 1);
2867 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
2868 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2869 contents + rel->r_offset);
2871 bfd_put_32 (output_bfd, tpoff (info, relocation),
2872 contents + rel->r_offset);
2877 if (htab->sgot == NULL)
2882 off = h->got.offset;
2883 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
2887 if (local_got_offsets == NULL)
2890 off = local_got_offsets[r_symndx];
2891 offplt = local_tlsdesc_gotents[r_symndx];
2898 Elf_Internal_Rela outrel;
2903 if (htab->srelgot == NULL)
2906 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2908 if (GOT_TLS_GDESC_P (tls_type))
2910 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
2911 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
2912 <= htab->sgotplt->size);
2913 outrel.r_offset = (htab->sgotplt->output_section->vma
2914 + htab->sgotplt->output_offset
2916 + htab->sgotplt_jump_table_size);
2917 sreloc = htab->srelplt;
2918 loc = sreloc->contents;
2919 loc += (htab->next_tls_desc_index++
2920 * sizeof (Elf32_External_Rel));
2921 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
2922 <= sreloc->contents + sreloc->size);
2923 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2926 BFD_ASSERT (! unresolved_reloc);
2927 bfd_put_32 (output_bfd,
2928 relocation - dtpoff_base (info),
2929 htab->sgotplt->contents + offplt
2930 + htab->sgotplt_jump_table_size + 4);
2934 bfd_put_32 (output_bfd, 0,
2935 htab->sgotplt->contents + offplt
2936 + htab->sgotplt_jump_table_size + 4);
2940 sreloc = htab->srelgot;
2942 outrel.r_offset = (htab->sgot->output_section->vma
2943 + htab->sgot->output_offset + off);
2945 if (GOT_TLS_GD_P (tls_type))
2946 dr_type = R_386_TLS_DTPMOD32;
2947 else if (GOT_TLS_GDESC_P (tls_type))
2949 else if (tls_type == GOT_TLS_IE_POS)
2950 dr_type = R_386_TLS_TPOFF;
2952 dr_type = R_386_TLS_TPOFF32;
2954 if (dr_type == R_386_TLS_TPOFF && indx == 0)
2955 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
2956 htab->sgot->contents + off);
2957 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
2958 bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
2959 htab->sgot->contents + off);
2960 else if (dr_type != R_386_TLS_DESC)
2961 bfd_put_32 (output_bfd, 0,
2962 htab->sgot->contents + off);
2963 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2965 loc = sreloc->contents;
2966 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
2967 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
2968 <= sreloc->contents + sreloc->size);
2969 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2971 if (GOT_TLS_GD_P (tls_type))
2975 BFD_ASSERT (! unresolved_reloc);
2976 bfd_put_32 (output_bfd,
2977 relocation - dtpoff_base (info),
2978 htab->sgot->contents + off + 4);
2982 bfd_put_32 (output_bfd, 0,
2983 htab->sgot->contents + off + 4);
2984 outrel.r_info = ELF32_R_INFO (indx,
2985 R_386_TLS_DTPOFF32);
2986 outrel.r_offset += 4;
2987 sreloc->reloc_count++;
2988 loc += sizeof (Elf32_External_Rel);
2989 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
2990 <= sreloc->contents + sreloc->size);
2991 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2994 else if (tls_type == GOT_TLS_IE_BOTH)
2996 bfd_put_32 (output_bfd,
2997 indx == 0 ? relocation - dtpoff_base (info) : 0,
2998 htab->sgot->contents + off + 4);
2999 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3000 outrel.r_offset += 4;
3001 sreloc->reloc_count++;
3002 loc += sizeof (Elf32_External_Rel);
3003 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3010 local_got_offsets[r_symndx] |= 1;
3013 if (off >= (bfd_vma) -2
3014 && ! GOT_TLS_GDESC_P (tls_type))
3016 if (r_type == R_386_TLS_GOTDESC
3017 || r_type == R_386_TLS_DESC_CALL)
3019 relocation = htab->sgotplt_jump_table_size + offplt;
3020 unresolved_reloc = FALSE;
3022 else if (r_type == ELF32_R_TYPE (rel->r_info))
3024 bfd_vma g_o_t = htab->sgotplt->output_section->vma
3025 + htab->sgotplt->output_offset;
3026 relocation = htab->sgot->output_section->vma
3027 + htab->sgot->output_offset + off - g_o_t;
3028 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3029 && tls_type == GOT_TLS_IE_BOTH)
3031 if (r_type == R_386_TLS_IE)
3032 relocation += g_o_t;
3033 unresolved_reloc = FALSE;
3035 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3037 unsigned int val, type;
3040 /* GD->IE transition. */
3041 BFD_ASSERT (rel->r_offset >= 2);
3042 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3043 BFD_ASSERT (type == 0x8d || type == 0x04);
3044 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
3045 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
3047 BFD_ASSERT (rel + 1 < relend);
3048 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
3049 roff = rel->r_offset - 3;
3050 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3053 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3055 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3056 BFD_ASSERT (rel->r_offset >= 3);
3057 BFD_ASSERT (bfd_get_8 (input_bfd,
3058 contents + rel->r_offset - 3)
3060 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
3065 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3067 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3068 BFD_ASSERT (rel->r_offset + 10 <= input_section->size);
3069 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
3070 BFD_ASSERT (bfd_get_8 (input_bfd,
3071 contents + rel->r_offset + 9)
3073 roff = rel->r_offset - 2;
3075 memcpy (contents + roff,
3076 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3077 contents[roff + 7] = 0x80 | (val & 7);
3078 /* If foo is used only with foo@gotntpoff(%reg) and
3079 foo@indntpoff, but not with foo@gottpoff(%reg), change
3080 subl $foo@gottpoff(%reg), %eax
3082 addl $foo@gotntpoff(%reg), %eax. */
3083 if (tls_type == GOT_TLS_IE_POS)
3084 contents[roff + 6] = 0x03;
3085 bfd_put_32 (output_bfd,
3086 htab->sgot->output_section->vma
3087 + htab->sgot->output_offset + off
3088 - htab->sgotplt->output_section->vma
3089 - htab->sgotplt->output_offset,
3090 contents + roff + 8);
3091 /* Skip R_386_PLT32. */
3095 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3097 /* GDesc -> IE transition.
3098 It's originally something like:
3099 leal x@tlsdesc(%ebx), %eax
3102 movl x@gotntpoff(%ebx), %eax # before nop; nop
3104 movl x@gottpoff(%ebx), %eax # before negl %eax
3106 Registers other than %eax may be set up here. */
3108 unsigned int val, type;
3111 /* First, make sure it's a leal adding ebx to a 32-bit
3112 offset into any register, although it's probably
3113 almost always going to be eax. */
3114 roff = rel->r_offset;
3115 BFD_ASSERT (roff >= 2);
3116 type = bfd_get_8 (input_bfd, contents + roff - 2);
3117 BFD_ASSERT (type == 0x8d);
3118 val = bfd_get_8 (input_bfd, contents + roff - 1);
3119 BFD_ASSERT ((val & 0xc7) == 0x83);
3120 BFD_ASSERT (roff + 4 <= input_section->size);
3122 /* Now modify the instruction as appropriate. */
3123 /* To turn a leal into a movl in the form we use it, it
3124 suffices to change the first byte from 0x8d to 0x8b.
3125 aoliva FIXME: should we decide to keep the leal, all
3126 we have to do is remove the statement below, and
3127 adjust the relaxation of R_386_TLS_DESC_CALL. */
3128 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3130 if (tls_type == GOT_TLS_IE_BOTH)
3133 bfd_put_32 (output_bfd,
3134 htab->sgot->output_section->vma
3135 + htab->sgot->output_offset + off
3136 - htab->sgotplt->output_section->vma
3137 - htab->sgotplt->output_offset,
3141 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3143 /* GDesc -> IE transition.
3151 depending on how we transformed the TLS_GOTDESC above.
3154 unsigned int val, type;
3157 /* First, make sure it's a call *(%eax). */
3158 roff = rel->r_offset;
3159 BFD_ASSERT (roff + 2 <= input_section->size);
3160 type = bfd_get_8 (input_bfd, contents + roff);
3161 BFD_ASSERT (type == 0xff);
3162 val = bfd_get_8 (input_bfd, contents + roff + 1);
3163 BFD_ASSERT (val == 0x10);
3165 /* Now modify the instruction as appropriate. */
3166 if (tls_type != GOT_TLS_IE_NEG)
3169 bfd_put_8 (output_bfd, 0x66, contents + roff);
3170 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3175 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3176 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3190 /* LD->LE transition:
3192 leal foo(%reg), %eax; call ___tls_get_addr.
3194 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3195 BFD_ASSERT (rel->r_offset >= 2);
3196 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
3198 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3199 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
3200 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
3201 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
3203 BFD_ASSERT (rel + 1 < relend);
3204 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
3205 memcpy (contents + rel->r_offset - 2,
3206 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3207 /* Skip R_386_PLT32. */
3212 if (htab->sgot == NULL)
3215 off = htab->tls_ldm_got.offset;
3220 Elf_Internal_Rela outrel;
3223 if (htab->srelgot == NULL)
3226 outrel.r_offset = (htab->sgot->output_section->vma
3227 + htab->sgot->output_offset + off);
3229 bfd_put_32 (output_bfd, 0,
3230 htab->sgot->contents + off);
3231 bfd_put_32 (output_bfd, 0,
3232 htab->sgot->contents + off + 4);
3233 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3234 loc = htab->srelgot->contents;
3235 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3236 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3237 htab->tls_ldm_got.offset |= 1;
3239 relocation = htab->sgot->output_section->vma
3240 + htab->sgot->output_offset + off
3241 - htab->sgotplt->output_section->vma
3242 - htab->sgotplt->output_offset;
3243 unresolved_reloc = FALSE;
3246 case R_386_TLS_LDO_32:
3247 if (info->shared || (input_section->flags & SEC_CODE) == 0)
3248 relocation -= dtpoff_base (info);
3250 /* When converting LDO to LE, we must negate. */
3251 relocation = -tpoff (info, relocation);
3254 case R_386_TLS_LE_32:
3258 Elf_Internal_Rela outrel;
3263 outrel.r_offset = rel->r_offset
3264 + input_section->output_section->vma
3265 + input_section->output_offset;
3266 if (h != NULL && h->dynindx != -1)
3270 if (r_type == R_386_TLS_LE_32)
3271 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3273 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3274 sreloc = elf_section_data (input_section)->sreloc;
3277 loc = sreloc->contents;
3278 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3279 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3282 else if (r_type == R_386_TLS_LE_32)
3283 relocation = dtpoff_base (info) - relocation;
3285 relocation -= dtpoff_base (info);
3287 else if (r_type == R_386_TLS_LE_32)
3288 relocation = tpoff (info, relocation);
3290 relocation = -tpoff (info, relocation);
3297 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3298 because such sections are not SEC_ALLOC and thus ld.so will
3299 not process them. */
3300 if (unresolved_reloc
3301 && !((input_section->flags & SEC_DEBUGGING) != 0
3304 (*_bfd_error_handler)
3305 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3308 (long) rel->r_offset,
3310 h->root.root.string);
3314 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3315 contents, rel->r_offset,
3318 if (r != bfd_reloc_ok)
3323 name = h->root.root.string;
3326 name = bfd_elf_string_from_elf_section (input_bfd,
3327 symtab_hdr->sh_link,
3332 name = bfd_section_name (input_bfd, sec);
3335 if (r == bfd_reloc_overflow)
3337 if (! ((*info->callbacks->reloc_overflow)
3338 (info, (h ? &h->root : NULL), name, howto->name,
3339 (bfd_vma) 0, input_bfd, input_section,
3345 (*_bfd_error_handler)
3346 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3347 input_bfd, input_section,
3348 (long) rel->r_offset, name, (int) r);
3357 /* Finish up dynamic symbol handling. We set the contents of various
3358 dynamic sections here. */
3361 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3362 struct bfd_link_info *info,
3363 struct elf_link_hash_entry *h,
3364 Elf_Internal_Sym *sym)
3366 struct elf_i386_link_hash_table *htab;
3368 htab = elf_i386_hash_table (info);
3370 if (h->plt.offset != (bfd_vma) -1)
3374 Elf_Internal_Rela rel;
3377 /* This symbol has an entry in the procedure linkage table. Set
3380 if (h->dynindx == -1
3381 || htab->splt == NULL
3382 || htab->sgotplt == NULL
3383 || htab->srelplt == NULL)
3386 /* Get the index in the procedure linkage table which
3387 corresponds to this symbol. This is the index of this symbol
3388 in all the symbols for which we are making plt entries. The
3389 first entry in the procedure linkage table is reserved. */
3390 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3392 /* Get the offset into the .got table of the entry that
3393 corresponds to this function. Each .got entry is 4 bytes.
3394 The first three are reserved. */
3395 got_offset = (plt_index + 3) * 4;
3397 /* Fill in the entry in the procedure linkage table. */
3400 memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
3402 bfd_put_32 (output_bfd,
3403 (htab->sgotplt->output_section->vma
3404 + htab->sgotplt->output_offset
3406 htab->splt->contents + h->plt.offset + 2);
3408 if (htab->is_vxworks)
3410 int s, k, reloc_index;
3412 /* Create the R_386_32 relocation referencing the GOT
3413 for this PLT entry. */
3415 /* S: Current slot number (zero-based). */
3416 s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3417 /* K: Number of relocations for PLTResolve. */
3419 k = PLTRESOLVE_RELOCS_SHLIB;
3421 k = PLTRESOLVE_RELOCS;
3422 /* Skip the PLTresolve relocations, and the relocations for
3423 the other PLT slots. */
3424 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3425 loc = (htab->srelplt2->contents + reloc_index
3426 * sizeof (Elf32_External_Rel));
3428 rel.r_offset = (htab->splt->output_section->vma
3429 + htab->splt->output_offset
3430 + h->plt.offset + 2),
3431 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3432 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3434 /* Create the R_386_32 relocation referencing the beginning of
3435 the PLT for this GOT entry. */
3436 rel.r_offset = (htab->sgotplt->output_section->vma
3437 + htab->sgotplt->output_offset
3439 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
3440 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3441 loc + sizeof (Elf32_External_Rel));
3446 memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
3448 bfd_put_32 (output_bfd, got_offset,
3449 htab->splt->contents + h->plt.offset + 2);
3452 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
3453 htab->splt->contents + h->plt.offset + 7);
3454 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
3455 htab->splt->contents + h->plt.offset + 12);
3457 /* Fill in the entry in the global offset table. */
3458 bfd_put_32 (output_bfd,
3459 (htab->splt->output_section->vma
3460 + htab->splt->output_offset
3463 htab->sgotplt->contents + got_offset);
3465 /* Fill in the entry in the .rel.plt section. */
3466 rel.r_offset = (htab->sgotplt->output_section->vma
3467 + htab->sgotplt->output_offset
3469 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
3470 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
3471 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3473 if (!h->def_regular)
3475 /* Mark the symbol as undefined, rather than as defined in
3476 the .plt section. Leave the value if there were any
3477 relocations where pointer equality matters (this is a clue
3478 for the dynamic linker, to make function pointer
3479 comparisons work between an application and shared
3480 library), otherwise set it to zero. If a function is only
3481 called from a binary, there is no need to slow down
3482 shared libraries because of that. */
3483 sym->st_shndx = SHN_UNDEF;
3484 if (!h->pointer_equality_needed)
3489 if (h->got.offset != (bfd_vma) -1
3490 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
3491 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
3493 Elf_Internal_Rela rel;
3496 /* This symbol has an entry in the global offset table. Set it
3499 if (htab->sgot == NULL || htab->srelgot == NULL)
3502 rel.r_offset = (htab->sgot->output_section->vma
3503 + htab->sgot->output_offset
3504 + (h->got.offset & ~(bfd_vma) 1));
3506 /* If this is a static link, or it is a -Bsymbolic link and the
3507 symbol is defined locally or was forced to be local because
3508 of a version file, we just want to emit a RELATIVE reloc.
3509 The entry in the global offset table will already have been
3510 initialized in the relocate_section function. */
3512 && SYMBOL_REFERENCES_LOCAL (info, h))
3514 BFD_ASSERT((h->got.offset & 1) != 0);
3515 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3519 BFD_ASSERT((h->got.offset & 1) == 0);
3520 bfd_put_32 (output_bfd, (bfd_vma) 0,
3521 htab->sgot->contents + h->got.offset);
3522 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3525 loc = htab->srelgot->contents;
3526 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3527 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3532 Elf_Internal_Rela rel;
3535 /* This symbol needs a copy reloc. Set it up. */
3537 if (h->dynindx == -1
3538 || (h->root.type != bfd_link_hash_defined
3539 && h->root.type != bfd_link_hash_defweak)
3540 || htab->srelbss == NULL)
3543 rel.r_offset = (h->root.u.def.value
3544 + h->root.u.def.section->output_section->vma
3545 + h->root.u.def.section->output_offset);
3546 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
3547 loc = htab->srelbss->contents;
3548 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
3549 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3552 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3553 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3554 is relative to the ".got" section. */
3555 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3556 || (!htab->is_vxworks && h == htab->elf.hgot))
3557 sym->st_shndx = SHN_ABS;
3562 /* Used to decide how to sort relocs in an optimal manner for the
3563 dynamic linker, before writing them out. */
3565 static enum elf_reloc_type_class
3566 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
3568 switch (ELF32_R_TYPE (rela->r_info))
3570 case R_386_RELATIVE:
3571 return reloc_class_relative;
3572 case R_386_JUMP_SLOT:
3573 return reloc_class_plt;
3575 return reloc_class_copy;
3577 return reloc_class_normal;
3581 /* Finish up the dynamic sections. */
3584 elf_i386_finish_dynamic_sections (bfd *output_bfd,
3585 struct bfd_link_info *info)
3587 struct elf_i386_link_hash_table *htab;
3591 htab = elf_i386_hash_table (info);
3592 dynobj = htab->elf.dynobj;
3593 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3595 if (htab->elf.dynamic_sections_created)
3597 Elf32_External_Dyn *dyncon, *dynconend;
3599 if (sdyn == NULL || htab->sgot == NULL)
3602 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3603 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3604 for (; dyncon < dynconend; dyncon++)
3606 Elf_Internal_Dyn dyn;
3609 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3618 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3623 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3628 dyn.d_un.d_val = s->size;
3632 /* My reading of the SVR4 ABI indicates that the
3633 procedure linkage table relocs (DT_JMPREL) should be
3634 included in the overall relocs (DT_REL). This is
3635 what Solaris does. However, UnixWare can not handle
3636 that case. Therefore, we override the DT_RELSZ entry
3637 here to make it not include the JMPREL relocs. */
3641 dyn.d_un.d_val -= s->size;
3645 /* We may not be using the standard ELF linker script.
3646 If .rel.plt is the first .rel section, we adjust
3647 DT_REL to not include it. */
3651 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
3653 dyn.d_un.d_ptr += s->size;
3657 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3660 /* Fill in the first entry in the procedure linkage table. */
3661 if (htab->splt && htab->splt->size > 0)
3665 memcpy (htab->splt->contents, elf_i386_pic_plt0_entry,
3666 sizeof (elf_i386_pic_plt0_entry));
3667 memset (htab->splt->contents + sizeof (elf_i386_pic_plt0_entry),
3668 htab->plt0_pad_byte,
3669 PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
3673 memcpy (htab->splt->contents, elf_i386_plt0_entry,
3674 sizeof(elf_i386_plt0_entry));
3675 memset (htab->splt->contents + sizeof (elf_i386_plt0_entry),
3676 htab->plt0_pad_byte,
3677 PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
3678 bfd_put_32 (output_bfd,
3679 (htab->sgotplt->output_section->vma
3680 + htab->sgotplt->output_offset
3682 htab->splt->contents + 2);
3683 bfd_put_32 (output_bfd,
3684 (htab->sgotplt->output_section->vma
3685 + htab->sgotplt->output_offset
3687 htab->splt->contents + 8);
3689 if (htab->is_vxworks)
3691 Elf_Internal_Rela rel;
3693 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3694 On IA32 we use REL relocations so the addend goes in
3695 the PLT directly. */
3696 rel.r_offset = (htab->splt->output_section->vma
3697 + htab->splt->output_offset
3699 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3700 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3701 htab->srelplt2->contents);
3702 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3703 rel.r_offset = (htab->splt->output_section->vma
3704 + htab->splt->output_offset
3706 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3707 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3708 htab->srelplt2->contents +
3709 sizeof (Elf32_External_Rel));
3713 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3714 really seem like the right value. */
3715 elf_section_data (htab->splt->output_section)
3716 ->this_hdr.sh_entsize = 4;
3718 /* Correct the .rel.plt.unloaded relocations. */
3719 if (htab->is_vxworks && !info->shared)
3721 int num_plts = (htab->splt->size / PLT_ENTRY_SIZE) - 1;
3724 p = htab->srelplt2->contents;
3726 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
3728 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
3730 for (; num_plts; num_plts--)
3732 Elf_Internal_Rela rel;
3733 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3734 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
3735 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3736 p += sizeof (Elf32_External_Rel);
3738 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
3739 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
3740 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3741 p += sizeof (Elf32_External_Rel);
3749 /* Fill in the first three entries in the global offset table. */
3750 if (htab->sgotplt->size > 0)
3752 bfd_put_32 (output_bfd,
3754 : sdyn->output_section->vma + sdyn->output_offset),
3755 htab->sgotplt->contents);
3756 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
3757 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
3760 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
3763 if (htab->sgot && htab->sgot->size > 0)
3764 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3769 /* Return address for Ith PLT stub in section PLT, for relocation REL
3770 or (bfd_vma) -1 if it should not be included. */
3773 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
3774 const arelent *rel ATTRIBUTE_UNUSED)
3776 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
3779 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
3782 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
3784 if (h->plt.offset != (bfd_vma) -1
3786 && !h->pointer_equality_needed)
3789 return _bfd_elf_hash_symbol (h);
3792 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3793 #define TARGET_LITTLE_NAME "elf32-i386"
3794 #define ELF_ARCH bfd_arch_i386
3795 #define ELF_MACHINE_CODE EM_386
3796 #define ELF_MAXPAGESIZE 0x1000
3798 #define elf_backend_can_gc_sections 1
3799 #define elf_backend_can_refcount 1
3800 #define elf_backend_want_got_plt 1
3801 #define elf_backend_plt_readonly 1
3802 #define elf_backend_want_plt_sym 0
3803 #define elf_backend_got_header_size 12
3805 /* Support RELA for objdump of prelink objects. */
3806 #define elf_info_to_howto elf_i386_info_to_howto_rel
3807 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3809 #define bfd_elf32_mkobject elf_i386_mkobject
3811 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3812 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3813 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3814 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3816 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3817 #define elf_backend_check_relocs elf_i386_check_relocs
3818 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
3819 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
3820 #define elf_backend_fake_sections elf_i386_fake_sections
3821 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3822 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3823 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3824 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
3825 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
3826 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
3827 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
3828 #define elf_backend_relocate_section elf_i386_relocate_section
3829 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
3830 #define elf_backend_always_size_sections elf_i386_always_size_sections
3831 #define elf_backend_omit_section_dynsym \
3832 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
3833 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
3834 #define elf_backend_hash_symbol elf_i386_hash_symbol
3836 #include "elf32-target.h"
3838 /* FreeBSD support. */
3840 #undef TARGET_LITTLE_SYM
3841 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3842 #undef TARGET_LITTLE_NAME
3843 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3845 #define ELF_OSABI ELFOSABI_FREEBSD
3847 /* The kernel recognizes executables as valid only if they carry a
3848 "FreeBSD" label in the ELF header. So we put this label on all
3849 executables and (for simplicity) also all other object files. */
3852 elf_i386_post_process_headers (bfd *abfd,
3853 struct bfd_link_info *info ATTRIBUTE_UNUSED)
3855 Elf_Internal_Ehdr *i_ehdrp;
3857 i_ehdrp = elf_elfheader (abfd);
3859 /* Put an ABI label supported by FreeBSD >= 4.1. */
3860 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
3861 #ifdef OLD_FREEBSD_ABI_LABEL
3862 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3863 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
3867 #undef elf_backend_post_process_headers
3868 #define elf_backend_post_process_headers elf_i386_post_process_headers
3870 #define elf32_bed elf32_i386_fbsd_bed
3872 #include "elf32-target.h"
3874 /* VxWorks support. */
3876 #undef TARGET_LITTLE_SYM
3877 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
3878 #undef TARGET_LITTLE_NAME
3879 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
3882 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
3884 static struct bfd_link_hash_table *
3885 elf_i386_vxworks_link_hash_table_create (bfd *abfd)
3887 struct bfd_link_hash_table *ret;
3888 struct elf_i386_link_hash_table *htab;
3890 ret = elf_i386_link_hash_table_create (abfd);
3893 htab = (struct elf_i386_link_hash_table *) ret;
3894 htab->is_vxworks = 1;
3895 htab->plt0_pad_byte = 0x90;
3902 #undef elf_backend_post_process_headers
3903 #undef bfd_elf32_bfd_link_hash_table_create
3904 #define bfd_elf32_bfd_link_hash_table_create \
3905 elf_i386_vxworks_link_hash_table_create
3906 #undef elf_backend_add_symbol_hook
3907 #define elf_backend_add_symbol_hook \
3908 elf_vxworks_add_symbol_hook
3909 #undef elf_backend_link_output_symbol_hook
3910 #define elf_backend_link_output_symbol_hook \
3911 elf_vxworks_link_output_symbol_hook
3912 #undef elf_backend_emit_relocs
3913 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
3914 #undef elf_backend_final_write_processing
3915 #define elf_backend_final_write_processing \
3916 elf_vxworks_final_write_processing
3918 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
3920 #undef elf_backend_want_plt_sym
3921 #define elf_backend_want_plt_sym 1
3924 #define elf32_bed elf32_i386_vxworks_bed
3926 #include "elf32-target.h"