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, 2008, 2009 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 3 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,
20 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
32 /* 386 uses REL relocations instead of RELA. */
37 static reloc_howto_type elf_howto_table[]=
39 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
40 bfd_elf_generic_reloc, "R_386_NONE",
41 TRUE, 0x00000000, 0x00000000, FALSE),
42 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
43 bfd_elf_generic_reloc, "R_386_32",
44 TRUE, 0xffffffff, 0xffffffff, FALSE),
45 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
46 bfd_elf_generic_reloc, "R_386_PC32",
47 TRUE, 0xffffffff, 0xffffffff, TRUE),
48 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
49 bfd_elf_generic_reloc, "R_386_GOT32",
50 TRUE, 0xffffffff, 0xffffffff, FALSE),
51 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
52 bfd_elf_generic_reloc, "R_386_PLT32",
53 TRUE, 0xffffffff, 0xffffffff, TRUE),
54 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
55 bfd_elf_generic_reloc, "R_386_COPY",
56 TRUE, 0xffffffff, 0xffffffff, FALSE),
57 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
58 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
59 TRUE, 0xffffffff, 0xffffffff, FALSE),
60 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
62 TRUE, 0xffffffff, 0xffffffff, FALSE),
63 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_386_RELATIVE",
65 TRUE, 0xffffffff, 0xffffffff, FALSE),
66 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_386_GOTOFF",
68 TRUE, 0xffffffff, 0xffffffff, FALSE),
69 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_386_GOTPC",
71 TRUE, 0xffffffff, 0xffffffff, TRUE),
73 /* We have a gap in the reloc numbers here.
74 R_386_standard counts the number up to this point, and
75 R_386_ext_offset is the value to subtract from a reloc type of
76 R_386_16 thru R_386_PC8 to form an index into this table. */
77 #define R_386_standard (R_386_GOTPC + 1)
78 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
80 /* These relocs are a GNU extension. */
81 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
83 TRUE, 0xffffffff, 0xffffffff, FALSE),
84 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_386_TLS_IE",
86 TRUE, 0xffffffff, 0xffffffff, FALSE),
87 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
89 TRUE, 0xffffffff, 0xffffffff, FALSE),
90 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_386_TLS_LE",
92 TRUE, 0xffffffff, 0xffffffff, FALSE),
93 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_386_TLS_GD",
95 TRUE, 0xffffffff, 0xffffffff, FALSE),
96 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
97 bfd_elf_generic_reloc, "R_386_TLS_LDM",
98 TRUE, 0xffffffff, 0xffffffff, FALSE),
99 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_386_16",
101 TRUE, 0xffff, 0xffff, FALSE),
102 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_386_PC16",
104 TRUE, 0xffff, 0xffff, TRUE),
105 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_386_8",
107 TRUE, 0xff, 0xff, FALSE),
108 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
109 bfd_elf_generic_reloc, "R_386_PC8",
110 TRUE, 0xff, 0xff, TRUE),
112 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
113 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
114 /* These are common with Solaris TLS implementation. */
115 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
117 TRUE, 0xffffffff, 0xffffffff, FALSE),
118 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
120 TRUE, 0xffffffff, 0xffffffff, FALSE),
121 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
123 TRUE, 0xffffffff, 0xffffffff, FALSE),
124 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
126 TRUE, 0xffffffff, 0xffffffff, FALSE),
127 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
129 TRUE, 0xffffffff, 0xffffffff, FALSE),
130 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
132 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
136 TRUE, 0xffffffff, 0xffffffff, FALSE),
137 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
138 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
140 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_386_TLS_DESC",
142 TRUE, 0xffffffff, 0xffffffff, FALSE),
143 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_IRELATIVE",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
148 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
149 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
151 /* GNU extension to record C++ vtable hierarchy. */
152 HOWTO (R_386_GNU_VTINHERIT, /* type */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
156 FALSE, /* pc_relative */
158 complain_overflow_dont, /* complain_on_overflow */
159 NULL, /* special_function */
160 "R_386_GNU_VTINHERIT", /* name */
161 FALSE, /* partial_inplace */
164 FALSE), /* pcrel_offset */
166 /* GNU extension to record C++ vtable member usage. */
167 HOWTO (R_386_GNU_VTENTRY, /* type */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
171 FALSE, /* pc_relative */
173 complain_overflow_dont, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
175 "R_386_GNU_VTENTRY", /* name */
176 FALSE, /* partial_inplace */
179 FALSE) /* pcrel_offset */
181 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
185 #ifdef DEBUG_GEN_RELOC
187 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
192 static reloc_howto_type *
193 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
194 bfd_reloc_code_real_type code)
199 TRACE ("BFD_RELOC_NONE");
200 return &elf_howto_table[R_386_NONE];
203 TRACE ("BFD_RELOC_32");
204 return &elf_howto_table[R_386_32];
207 TRACE ("BFD_RELOC_CTOR");
208 return &elf_howto_table[R_386_32];
210 case BFD_RELOC_32_PCREL:
211 TRACE ("BFD_RELOC_PC32");
212 return &elf_howto_table[R_386_PC32];
214 case BFD_RELOC_386_GOT32:
215 TRACE ("BFD_RELOC_386_GOT32");
216 return &elf_howto_table[R_386_GOT32];
218 case BFD_RELOC_386_PLT32:
219 TRACE ("BFD_RELOC_386_PLT32");
220 return &elf_howto_table[R_386_PLT32];
222 case BFD_RELOC_386_COPY:
223 TRACE ("BFD_RELOC_386_COPY");
224 return &elf_howto_table[R_386_COPY];
226 case BFD_RELOC_386_GLOB_DAT:
227 TRACE ("BFD_RELOC_386_GLOB_DAT");
228 return &elf_howto_table[R_386_GLOB_DAT];
230 case BFD_RELOC_386_JUMP_SLOT:
231 TRACE ("BFD_RELOC_386_JUMP_SLOT");
232 return &elf_howto_table[R_386_JUMP_SLOT];
234 case BFD_RELOC_386_RELATIVE:
235 TRACE ("BFD_RELOC_386_RELATIVE");
236 return &elf_howto_table[R_386_RELATIVE];
238 case BFD_RELOC_386_GOTOFF:
239 TRACE ("BFD_RELOC_386_GOTOFF");
240 return &elf_howto_table[R_386_GOTOFF];
242 case BFD_RELOC_386_GOTPC:
243 TRACE ("BFD_RELOC_386_GOTPC");
244 return &elf_howto_table[R_386_GOTPC];
246 /* These relocs are a GNU extension. */
247 case BFD_RELOC_386_TLS_TPOFF:
248 TRACE ("BFD_RELOC_386_TLS_TPOFF");
249 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
251 case BFD_RELOC_386_TLS_IE:
252 TRACE ("BFD_RELOC_386_TLS_IE");
253 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
255 case BFD_RELOC_386_TLS_GOTIE:
256 TRACE ("BFD_RELOC_386_TLS_GOTIE");
257 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
259 case BFD_RELOC_386_TLS_LE:
260 TRACE ("BFD_RELOC_386_TLS_LE");
261 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
263 case BFD_RELOC_386_TLS_GD:
264 TRACE ("BFD_RELOC_386_TLS_GD");
265 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
267 case BFD_RELOC_386_TLS_LDM:
268 TRACE ("BFD_RELOC_386_TLS_LDM");
269 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
272 TRACE ("BFD_RELOC_16");
273 return &elf_howto_table[R_386_16 - R_386_ext_offset];
275 case BFD_RELOC_16_PCREL:
276 TRACE ("BFD_RELOC_16_PCREL");
277 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
280 TRACE ("BFD_RELOC_8");
281 return &elf_howto_table[R_386_8 - R_386_ext_offset];
283 case BFD_RELOC_8_PCREL:
284 TRACE ("BFD_RELOC_8_PCREL");
285 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
287 /* Common with Sun TLS implementation. */
288 case BFD_RELOC_386_TLS_LDO_32:
289 TRACE ("BFD_RELOC_386_TLS_LDO_32");
290 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
292 case BFD_RELOC_386_TLS_IE_32:
293 TRACE ("BFD_RELOC_386_TLS_IE_32");
294 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
296 case BFD_RELOC_386_TLS_LE_32:
297 TRACE ("BFD_RELOC_386_TLS_LE_32");
298 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
300 case BFD_RELOC_386_TLS_DTPMOD32:
301 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
302 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
304 case BFD_RELOC_386_TLS_DTPOFF32:
305 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
306 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
308 case BFD_RELOC_386_TLS_TPOFF32:
309 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
310 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
312 case BFD_RELOC_386_TLS_GOTDESC:
313 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
314 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
316 case BFD_RELOC_386_TLS_DESC_CALL:
317 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
318 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
320 case BFD_RELOC_386_TLS_DESC:
321 TRACE ("BFD_RELOC_386_TLS_DESC");
322 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
324 case BFD_RELOC_386_IRELATIVE:
325 TRACE ("BFD_RELOC_386_IRELATIVE");
326 return &elf_howto_table[R_386_IRELATIVE];
328 case BFD_RELOC_VTABLE_INHERIT:
329 TRACE ("BFD_RELOC_VTABLE_INHERIT");
330 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
332 case BFD_RELOC_VTABLE_ENTRY:
333 TRACE ("BFD_RELOC_VTABLE_ENTRY");
334 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
344 static reloc_howto_type *
345 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
350 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
351 if (elf_howto_table[i].name != NULL
352 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
353 return &elf_howto_table[i];
358 static reloc_howto_type *
359 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
363 if ((indx = r_type) >= R_386_standard
364 && ((indx = r_type - R_386_ext_offset) - R_386_standard
365 >= R_386_ext - R_386_standard)
366 && ((indx = r_type - R_386_tls_offset) - R_386_ext
367 >= R_386_irelative - R_386_ext)
368 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
369 >= R_386_vt - R_386_irelative))
371 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
375 BFD_ASSERT (elf_howto_table [indx].type == r_type);
376 return &elf_howto_table[indx];
380 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
382 Elf_Internal_Rela *dst)
384 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
385 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
388 /* Return whether a symbol name implies a local label. The UnixWare
389 2.1 cc generates temporary symbols that start with .X, so we
390 recognize them here. FIXME: do other SVR4 compilers also use .X?.
391 If so, we should move the .X recognition into
392 _bfd_elf_is_local_label_name. */
395 elf_i386_is_local_label_name (bfd *abfd, const char *name)
397 if (name[0] == '.' && name[1] == 'X')
400 return _bfd_elf_is_local_label_name (abfd, name);
403 /* Support for core dump NOTE sections. */
406 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
411 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
413 int pr_version = bfd_get_32 (abfd, note->descdata);
419 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
422 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
426 size = bfd_get_32 (abfd, note->descdata + 8);
430 switch (note->descsz)
435 case 144: /* Linux/i386 */
437 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
440 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
450 /* Make a ".reg/999" section. */
451 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
452 size, note->descpos + offset);
456 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
458 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
460 int pr_version = bfd_get_32 (abfd, note->descdata);
465 elf_tdata (abfd)->core_program
466 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
467 elf_tdata (abfd)->core_command
468 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
472 switch (note->descsz)
477 case 124: /* Linux/i386 elf_prpsinfo. */
478 elf_tdata (abfd)->core_program
479 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
480 elf_tdata (abfd)->core_command
481 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
485 /* Note that for some reason, a spurious space is tacked
486 onto the end of the args in some (at least one anyway)
487 implementations, so strip it off if it exists. */
489 char *command = elf_tdata (abfd)->core_command;
490 int n = strlen (command);
492 if (0 < n && command[n - 1] == ' ')
493 command[n - 1] = '\0';
499 /* Functions for the i386 ELF linker.
501 In order to gain some understanding of code in this file without
502 knowing all the intricate details of the linker, note the
505 Functions named elf_i386_* are called by external routines, other
506 functions are only called locally. elf_i386_* functions appear
507 in this file more or less in the order in which they are called
508 from external routines. eg. elf_i386_check_relocs is called
509 early in the link process, elf_i386_finish_dynamic_sections is
510 one of the last functions. */
513 /* The name of the dynamic interpreter. This is put in the .interp
516 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
518 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
519 copying dynamic variables from a shared lib into an app's dynbss
520 section, and instead use a dynamic relocation to point into the
522 #define ELIMINATE_COPY_RELOCS 1
524 /* The size in bytes of an entry in the procedure linkage table. */
526 #define PLT_ENTRY_SIZE 16
528 /* The first entry in an absolute procedure linkage table looks like
529 this. See the SVR4 ABI i386 supplement to see how this works.
530 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
532 static const bfd_byte elf_i386_plt0_entry[12] =
534 0xff, 0x35, /* pushl contents of address */
535 0, 0, 0, 0, /* replaced with address of .got + 4. */
536 0xff, 0x25, /* jmp indirect */
537 0, 0, 0, 0 /* replaced with address of .got + 8. */
540 /* Subsequent entries in an absolute procedure linkage table look like
543 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
545 0xff, 0x25, /* jmp indirect */
546 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
547 0x68, /* pushl immediate */
548 0, 0, 0, 0, /* replaced with offset into relocation table. */
549 0xe9, /* jmp relative */
550 0, 0, 0, 0 /* replaced with offset to start of .plt. */
553 /* The first entry in a PIC procedure linkage table look like this.
554 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
556 static const bfd_byte elf_i386_pic_plt0_entry[12] =
558 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
559 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
562 /* Subsequent entries in a PIC procedure linkage table look like this. */
564 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
566 0xff, 0xa3, /* jmp *offset(%ebx) */
567 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
568 0x68, /* pushl immediate */
569 0, 0, 0, 0, /* replaced with offset into relocation table. */
570 0xe9, /* jmp relative */
571 0, 0, 0, 0 /* replaced with offset to start of .plt. */
574 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
575 for the PLTResolve stub and then for each PLT entry. */
576 #define PLTRESOLVE_RELOCS_SHLIB 0
577 #define PLTRESOLVE_RELOCS 2
578 #define PLT_NON_JUMP_SLOT_RELOCS 2
580 /* i386 ELF linker hash entry. */
582 struct elf_i386_link_hash_entry
584 struct elf_link_hash_entry elf;
586 /* Track dynamic relocs copied for this symbol. */
587 struct elf_dyn_relocs *dyn_relocs;
589 #define GOT_UNKNOWN 0
593 #define GOT_TLS_IE_POS 5
594 #define GOT_TLS_IE_NEG 6
595 #define GOT_TLS_IE_BOTH 7
596 #define GOT_TLS_GDESC 8
597 #define GOT_TLS_GD_BOTH_P(type) \
598 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
599 #define GOT_TLS_GD_P(type) \
600 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
601 #define GOT_TLS_GDESC_P(type) \
602 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
603 #define GOT_TLS_GD_ANY_P(type) \
604 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
605 unsigned char tls_type;
607 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
608 starting at the end of the jump table. */
612 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
614 struct elf_i386_obj_tdata
616 struct elf_obj_tdata root;
618 /* tls_type for each local got entry. */
619 char *local_got_tls_type;
621 /* GOTPLT entries for TLS descriptors. */
622 bfd_vma *local_tlsdesc_gotent;
625 #define elf_i386_tdata(abfd) \
626 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
628 #define elf_i386_local_got_tls_type(abfd) \
629 (elf_i386_tdata (abfd)->local_got_tls_type)
631 #define elf_i386_local_tlsdesc_gotent(abfd) \
632 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
634 #define is_i386_elf(bfd) \
635 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
636 && elf_tdata (bfd) != NULL \
637 && elf_object_id (bfd) == I386_ELF_TDATA)
640 elf_i386_mkobject (bfd *abfd)
642 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
646 /* i386 ELF linker hash table. */
648 struct elf_i386_link_hash_table
650 struct elf_link_hash_table elf;
652 /* Short-cuts to get to dynamic linker sections. */
656 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
659 /* True if the target system is VxWorks. */
662 /* Value used to fill the last word of the first plt entry. */
663 bfd_byte plt0_pad_byte;
665 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
666 bfd_vma next_tls_desc_index;
669 bfd_signed_vma refcount;
673 /* The amount of space used by the reserved portion of the sgotplt
674 section, plus whatever space is used by the jump slots. */
675 bfd_vma sgotplt_jump_table_size;
677 /* Small local sym cache. */
678 struct sym_cache sym_cache;
680 /* _TLS_MODULE_BASE_ symbol. */
681 struct bfd_link_hash_entry *tls_module_base;
683 /* Used by local STT_GNU_IFUNC symbols. */
684 htab_t loc_hash_table;
685 void *loc_hash_memory;
688 /* Get the i386 ELF linker hash table from a link_info structure. */
690 #define elf_i386_hash_table(p) \
691 ((struct elf_i386_link_hash_table *) ((p)->hash))
693 #define elf_i386_compute_jump_table_size(htab) \
694 ((htab)->next_tls_desc_index * 4)
696 /* Create an entry in an i386 ELF linker hash table. */
698 static struct bfd_hash_entry *
699 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
700 struct bfd_hash_table *table,
703 /* Allocate the structure if it has not already been allocated by a
707 entry = (struct bfd_hash_entry *)
708 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
713 /* Call the allocation method of the superclass. */
714 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
717 struct elf_i386_link_hash_entry *eh;
719 eh = (struct elf_i386_link_hash_entry *) entry;
720 eh->dyn_relocs = NULL;
721 eh->tls_type = GOT_UNKNOWN;
722 eh->tlsdesc_got = (bfd_vma) -1;
728 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
729 for local symbol so that we can handle local STT_GNU_IFUNC symbols
730 as global symbol. We reuse indx and dynstr_index for local symbol
731 hash since they aren't used by global symbols in this backend. */
734 elf_i386_local_htab_hash (const void *ptr)
736 struct elf_link_hash_entry *h
737 = (struct elf_link_hash_entry *) ptr;
738 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
741 /* Compare local hash entries. */
744 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
746 struct elf_link_hash_entry *h1
747 = (struct elf_link_hash_entry *) ptr1;
748 struct elf_link_hash_entry *h2
749 = (struct elf_link_hash_entry *) ptr2;
751 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
754 /* Find and/or create a hash entry for local symbol. */
756 static struct elf_link_hash_entry *
757 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
758 bfd *abfd, const Elf_Internal_Rela *rel,
761 struct elf_i386_link_hash_entry e, *ret;
762 asection *sec = abfd->sections;
763 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
764 ELF32_R_SYM (rel->r_info));
767 e.elf.indx = sec->id;
768 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
769 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
770 create ? INSERT : NO_INSERT);
777 ret = (struct elf_i386_link_hash_entry *) *slot;
781 ret = (struct elf_i386_link_hash_entry *)
782 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
783 sizeof (struct elf_i386_link_hash_entry));
786 memset (ret, 0, sizeof (*ret));
787 ret->elf.indx = sec->id;
788 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
789 ret->elf.dynindx = -1;
790 ret->elf.plt.offset = (bfd_vma) -1;
791 ret->elf.got.offset = (bfd_vma) -1;
797 /* Create an i386 ELF linker hash table. */
799 static struct bfd_link_hash_table *
800 elf_i386_link_hash_table_create (bfd *abfd)
802 struct elf_i386_link_hash_table *ret;
803 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
805 ret = (struct elf_i386_link_hash_table *) bfd_malloc (amt);
809 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
810 elf_i386_link_hash_newfunc,
811 sizeof (struct elf_i386_link_hash_entry)))
819 ret->tls_ldm_got.refcount = 0;
820 ret->next_tls_desc_index = 0;
821 ret->sgotplt_jump_table_size = 0;
822 ret->sym_cache.abfd = NULL;
824 ret->srelplt2 = NULL;
825 ret->plt0_pad_byte = 0;
826 ret->tls_module_base = NULL;
828 ret->loc_hash_table = htab_try_create (1024,
829 elf_i386_local_htab_hash,
830 elf_i386_local_htab_eq,
832 ret->loc_hash_memory = objalloc_create ();
833 if (!ret->loc_hash_table || !ret->loc_hash_memory)
839 return &ret->elf.root;
842 /* Destroy an i386 ELF linker hash table. */
845 elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash)
847 struct elf_i386_link_hash_table *htab
848 = (struct elf_i386_link_hash_table *) hash;
850 if (htab->loc_hash_table)
851 htab_delete (htab->loc_hash_table);
852 if (htab->loc_hash_memory)
853 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
854 _bfd_generic_link_hash_table_free (hash);
857 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
858 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
862 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
864 struct elf_i386_link_hash_table *htab;
866 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
869 htab = elf_i386_hash_table (info);
870 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
872 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
875 || (!info->shared && !htab->srelbss))
879 && !elf_vxworks_create_dynamic_sections (dynobj, info,
886 /* Copy the extra info we tack onto an elf_link_hash_entry. */
889 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
890 struct elf_link_hash_entry *dir,
891 struct elf_link_hash_entry *ind)
893 struct elf_i386_link_hash_entry *edir, *eind;
895 edir = (struct elf_i386_link_hash_entry *) dir;
896 eind = (struct elf_i386_link_hash_entry *) ind;
898 if (eind->dyn_relocs != NULL)
900 if (edir->dyn_relocs != NULL)
902 struct elf_dyn_relocs **pp;
903 struct elf_dyn_relocs *p;
905 /* Add reloc counts against the indirect sym to the direct sym
906 list. Merge any entries against the same section. */
907 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
909 struct elf_dyn_relocs *q;
911 for (q = edir->dyn_relocs; q != NULL; q = q->next)
912 if (q->sec == p->sec)
914 q->pc_count += p->pc_count;
915 q->count += p->count;
922 *pp = edir->dyn_relocs;
925 edir->dyn_relocs = eind->dyn_relocs;
926 eind->dyn_relocs = NULL;
929 if (ind->root.type == bfd_link_hash_indirect
930 && dir->got.refcount <= 0)
932 edir->tls_type = eind->tls_type;
933 eind->tls_type = GOT_UNKNOWN;
936 if (ELIMINATE_COPY_RELOCS
937 && ind->root.type != bfd_link_hash_indirect
938 && dir->dynamic_adjusted)
940 /* If called to transfer flags for a weakdef during processing
941 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
942 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
943 dir->ref_dynamic |= ind->ref_dynamic;
944 dir->ref_regular |= ind->ref_regular;
945 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
946 dir->needs_plt |= ind->needs_plt;
947 dir->pointer_equality_needed |= ind->pointer_equality_needed;
950 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
960 /* Return TRUE if the TLS access code sequence support transition
964 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
966 Elf_Internal_Shdr *symtab_hdr,
967 struct elf_link_hash_entry **sym_hashes,
969 const Elf_Internal_Rela *rel,
970 const Elf_Internal_Rela *relend)
972 unsigned int val, type;
973 unsigned long r_symndx;
974 struct elf_link_hash_entry *h;
977 /* Get the section contents. */
978 if (contents == NULL)
980 if (elf_section_data (sec)->this_hdr.contents != NULL)
981 contents = elf_section_data (sec)->this_hdr.contents;
984 /* FIXME: How to better handle error condition? */
985 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
988 /* Cache the section contents for elf_link_input_bfd. */
989 elf_section_data (sec)->this_hdr.contents = contents;
993 offset = rel->r_offset;
998 if (offset < 2 || (rel + 1) >= relend)
1001 type = bfd_get_8 (abfd, contents + offset - 2);
1002 if (r_type == R_386_TLS_GD)
1004 /* Check transition from GD access model. Only
1005 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1006 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1007 can transit to different access model. */
1008 if ((offset + 10) > sec->size ||
1009 (type != 0x8d && type != 0x04))
1012 val = bfd_get_8 (abfd, contents + offset - 1);
1015 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1019 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1022 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1027 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1028 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1031 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1037 /* Check transition from LD access model. Only
1038 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1039 can transit to different access model. */
1040 if (type != 0x8d || (offset + 9) > sec->size)
1043 val = bfd_get_8 (abfd, contents + offset - 1);
1044 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1048 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1051 r_symndx = ELF32_R_SYM (rel[1].r_info);
1052 if (r_symndx < symtab_hdr->sh_info)
1055 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1056 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1057 may be versioned. */
1059 && h->root.root.string != NULL
1060 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1061 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1062 && (strncmp (h->root.root.string, "___tls_get_addr",
1066 /* Check transition from IE access model:
1067 movl foo@indntpoff(%rip), %eax
1068 movl foo@indntpoff(%rip), %reg
1069 addl foo@indntpoff(%rip), %reg
1072 if (offset < 1 || (offset + 4) > sec->size)
1075 /* Check "movl foo@tpoff(%rip), %eax" first. */
1076 val = bfd_get_8 (abfd, contents + offset - 1);
1083 /* Check movl|addl foo@tpoff(%rip), %reg. */
1084 type = bfd_get_8 (abfd, contents + offset - 2);
1085 return ((type == 0x8b || type == 0x03)
1086 && (val & 0xc7) == 0x05);
1088 case R_386_TLS_GOTIE:
1089 case R_386_TLS_IE_32:
1090 /* Check transition from {IE_32,GOTIE} access model:
1091 subl foo@{tpoff,gontoff}(%reg1), %reg2
1092 movl foo@{tpoff,gontoff}(%reg1), %reg2
1093 addl foo@{tpoff,gontoff}(%reg1), %reg2
1096 if (offset < 2 || (offset + 4) > sec->size)
1099 val = bfd_get_8 (abfd, contents + offset - 1);
1100 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1103 type = bfd_get_8 (abfd, contents + offset - 2);
1104 return type == 0x8b || type == 0x2b || type == 0x03;
1106 case R_386_TLS_GOTDESC:
1107 /* Check transition from GDesc access model:
1108 leal x@tlsdesc(%ebx), %eax
1110 Make sure it's a leal adding ebx to a 32-bit offset
1111 into any register, although it's probably almost always
1114 if (offset < 2 || (offset + 4) > sec->size)
1117 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1120 val = bfd_get_8 (abfd, contents + offset - 1);
1121 return (val & 0xc7) == 0x83;
1123 case R_386_TLS_DESC_CALL:
1124 /* Check transition from GDesc access model:
1125 call *x@tlsdesc(%rax)
1127 if (offset + 2 <= sec->size)
1129 /* Make sure that it's a call *x@tlsdesc(%rax). */
1130 static i386_opcode16 call = { { 0xff, 0x10 } };
1131 return bfd_get_16 (abfd, contents + offset) == call.i;
1141 /* Return TRUE if the TLS access transition is OK or no transition
1142 will be performed. Update R_TYPE if there is a transition. */
1145 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1146 asection *sec, bfd_byte *contents,
1147 Elf_Internal_Shdr *symtab_hdr,
1148 struct elf_link_hash_entry **sym_hashes,
1149 unsigned int *r_type, int tls_type,
1150 const Elf_Internal_Rela *rel,
1151 const Elf_Internal_Rela *relend,
1152 struct elf_link_hash_entry *h,
1153 unsigned long r_symndx)
1155 unsigned int from_type = *r_type;
1156 unsigned int to_type = from_type;
1157 bfd_boolean check = TRUE;
1162 case R_386_TLS_GOTDESC:
1163 case R_386_TLS_DESC_CALL:
1164 case R_386_TLS_IE_32:
1166 case R_386_TLS_GOTIE:
1167 if (info->executable)
1170 to_type = R_386_TLS_LE_32;
1171 else if (from_type != R_386_TLS_IE
1172 && from_type != R_386_TLS_GOTIE)
1173 to_type = R_386_TLS_IE_32;
1176 /* When we are called from elf_i386_relocate_section, CONTENTS
1177 isn't NULL and there may be additional transitions based on
1179 if (contents != NULL)
1181 unsigned int new_to_type = to_type;
1183 if (info->executable
1186 && (tls_type & GOT_TLS_IE))
1187 new_to_type = R_386_TLS_LE_32;
1189 if (to_type == R_386_TLS_GD
1190 || to_type == R_386_TLS_GOTDESC
1191 || to_type == R_386_TLS_DESC_CALL)
1193 if (tls_type == GOT_TLS_IE_POS)
1194 new_to_type = R_386_TLS_GOTIE;
1195 else if (tls_type & GOT_TLS_IE)
1196 new_to_type = R_386_TLS_IE_32;
1199 /* We checked the transition before when we were called from
1200 elf_i386_check_relocs. We only want to check the new
1201 transition which hasn't been checked before. */
1202 check = new_to_type != to_type && from_type == to_type;
1203 to_type = new_to_type;
1209 if (info->executable)
1210 to_type = R_386_TLS_LE_32;
1217 /* Return TRUE if there is no transition. */
1218 if (from_type == to_type)
1221 /* Check if the transition can be performed. */
1223 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1224 symtab_hdr, sym_hashes,
1225 from_type, rel, relend))
1227 reloc_howto_type *from, *to;
1230 from = elf_i386_rtype_to_howto (abfd, from_type);
1231 to = elf_i386_rtype_to_howto (abfd, to_type);
1234 name = h->root.root.string;
1237 Elf_Internal_Sym *isym;
1238 struct elf_i386_link_hash_table *htab;
1239 htab = elf_i386_hash_table (info);
1240 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1242 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1245 (*_bfd_error_handler)
1246 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1247 "in section `%A' failed"),
1248 abfd, sec, from->name, to->name, name,
1249 (unsigned long) rel->r_offset);
1250 bfd_set_error (bfd_error_bad_value);
1258 /* Look through the relocs for a section during the first phase, and
1259 calculate needed space in the global offset table, procedure linkage
1260 table, and dynamic reloc sections. */
1263 elf_i386_check_relocs (bfd *abfd,
1264 struct bfd_link_info *info,
1266 const Elf_Internal_Rela *relocs)
1268 struct elf_i386_link_hash_table *htab;
1269 Elf_Internal_Shdr *symtab_hdr;
1270 struct elf_link_hash_entry **sym_hashes;
1271 const Elf_Internal_Rela *rel;
1272 const Elf_Internal_Rela *rel_end;
1275 if (info->relocatable)
1278 BFD_ASSERT (is_i386_elf (abfd));
1280 htab = elf_i386_hash_table (info);
1281 symtab_hdr = &elf_symtab_hdr (abfd);
1282 sym_hashes = elf_sym_hashes (abfd);
1286 rel_end = relocs + sec->reloc_count;
1287 for (rel = relocs; rel < rel_end; rel++)
1289 unsigned int r_type;
1290 unsigned long r_symndx;
1291 struct elf_link_hash_entry *h;
1292 Elf_Internal_Sym *isym;
1295 r_symndx = ELF32_R_SYM (rel->r_info);
1296 r_type = ELF32_R_TYPE (rel->r_info);
1298 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1300 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1306 if (r_symndx < symtab_hdr->sh_info)
1308 /* A local symbol. */
1309 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1314 /* Check relocation against local STT_GNU_IFUNC symbol. */
1315 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1317 h = elf_i386_get_local_sym_hash (htab, abfd, rel,
1322 /* Fake a STT_GNU_IFUNC symbol. */
1323 h->type = STT_GNU_IFUNC;
1326 h->forced_local = 1;
1327 h->root.type = bfd_link_hash_defined;
1335 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1336 while (h->root.type == bfd_link_hash_indirect
1337 || h->root.type == bfd_link_hash_warning)
1338 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1343 /* Create the ifunc sections for static executables. If we
1344 never see an indirect function symbol nor we are building
1345 a static executable, those sections will be empty and
1346 won't appear in output. */
1357 if (!_bfd_elf_create_ifunc_sections (abfd, info))
1362 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1363 it here if it is defined in a non-shared object. */
1364 if (h->type == STT_GNU_IFUNC
1367 /* It is referenced by a non-shared object. */
1371 /* STT_GNU_IFUNC symbol must go through PLT. */
1372 h->plt.refcount += 1;
1374 /* STT_GNU_IFUNC needs dynamic sections. */
1375 if (htab->elf.dynobj == NULL)
1376 htab->elf.dynobj = abfd;
1381 if (h->root.root.string)
1382 name = h->root.root.string;
1384 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1386 (*_bfd_error_handler)
1387 (_("%B: relocation %s against STT_GNU_IFUNC "
1388 "symbol `%s' isn't handled by %s"), abfd,
1389 elf_howto_table[r_type].name,
1390 name, __FUNCTION__);
1391 bfd_set_error (bfd_error_bad_value);
1396 h->pointer_equality_needed = 1;
1399 /* We must copy these reloc types into the
1400 output file. Create a reloc section in
1401 dynobj and make room for this reloc. */
1402 sreloc = _bfd_elf_create_ifunc_dyn_reloc
1403 (abfd, info, sec, sreloc,
1404 &((struct elf_i386_link_hash_entry *) h)->dyn_relocs);
1419 h->got.refcount += 1;
1420 if (htab->elf.sgot == NULL
1421 && !_bfd_elf_create_got_section (htab->elf.dynobj,
1431 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1432 symtab_hdr, sym_hashes,
1433 &r_type, GOT_UNKNOWN,
1434 rel, rel_end, h, r_symndx))
1440 htab->tls_ldm_got.refcount += 1;
1444 /* This symbol requires a procedure linkage table entry. We
1445 actually build the entry in adjust_dynamic_symbol,
1446 because this might be a case of linking PIC code which is
1447 never referenced by a dynamic object, in which case we
1448 don't need to generate a procedure linkage table entry
1451 /* If this is a local symbol, we resolve it directly without
1452 creating a procedure linkage table entry. */
1457 h->plt.refcount += 1;
1460 case R_386_TLS_IE_32:
1462 case R_386_TLS_GOTIE:
1463 if (!info->executable)
1464 info->flags |= DF_STATIC_TLS;
1469 case R_386_TLS_GOTDESC:
1470 case R_386_TLS_DESC_CALL:
1471 /* This symbol requires a global offset table entry. */
1473 int tls_type, old_tls_type;
1478 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1479 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1480 case R_386_TLS_GOTDESC:
1481 case R_386_TLS_DESC_CALL:
1482 tls_type = GOT_TLS_GDESC; break;
1483 case R_386_TLS_IE_32:
1484 if (ELF32_R_TYPE (rel->r_info) == r_type)
1485 tls_type = GOT_TLS_IE_NEG;
1487 /* If this is a GD->IE transition, we may use either of
1488 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1489 tls_type = GOT_TLS_IE;
1492 case R_386_TLS_GOTIE:
1493 tls_type = GOT_TLS_IE_POS; break;
1498 h->got.refcount += 1;
1499 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1503 bfd_signed_vma *local_got_refcounts;
1505 /* This is a global offset table entry for a local symbol. */
1506 local_got_refcounts = elf_local_got_refcounts (abfd);
1507 if (local_got_refcounts == NULL)
1511 size = symtab_hdr->sh_info;
1512 size *= (sizeof (bfd_signed_vma)
1513 + sizeof (bfd_vma) + sizeof(char));
1514 local_got_refcounts = (bfd_signed_vma *)
1515 bfd_zalloc (abfd, size);
1516 if (local_got_refcounts == NULL)
1518 elf_local_got_refcounts (abfd) = local_got_refcounts;
1519 elf_i386_local_tlsdesc_gotent (abfd)
1520 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1521 elf_i386_local_got_tls_type (abfd)
1522 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1524 local_got_refcounts[r_symndx] += 1;
1525 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1528 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1529 tls_type |= old_tls_type;
1530 /* If a TLS symbol is accessed using IE at least once,
1531 there is no point to use dynamic model for it. */
1532 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1533 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1534 || (tls_type & GOT_TLS_IE) == 0))
1536 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1537 tls_type = old_tls_type;
1538 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1539 && GOT_TLS_GD_ANY_P (tls_type))
1540 tls_type |= old_tls_type;
1544 name = h->root.root.string;
1546 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1548 (*_bfd_error_handler)
1549 (_("%B: `%s' accessed both as normal and "
1550 "thread local symbol"),
1556 if (old_tls_type != tls_type)
1559 elf_i386_hash_entry (h)->tls_type = tls_type;
1561 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1569 if (htab->elf.sgot == NULL)
1571 if (htab->elf.dynobj == NULL)
1572 htab->elf.dynobj = abfd;
1573 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1576 if (r_type != R_386_TLS_IE)
1580 case R_386_TLS_LE_32:
1582 if (info->executable)
1584 info->flags |= DF_STATIC_TLS;
1589 if (h != NULL && info->executable)
1591 /* If this reloc is in a read-only section, we might
1592 need a copy reloc. We can't check reliably at this
1593 stage whether the section is read-only, as input
1594 sections have not yet been mapped to output sections.
1595 Tentatively set the flag for now, and correct in
1596 adjust_dynamic_symbol. */
1599 /* We may need a .plt entry if the function this reloc
1600 refers to is in a shared lib. */
1601 h->plt.refcount += 1;
1602 if (r_type != R_386_PC32)
1603 h->pointer_equality_needed = 1;
1606 /* If we are creating a shared library, and this is a reloc
1607 against a global symbol, or a non PC relative reloc
1608 against a local symbol, then we need to copy the reloc
1609 into the shared library. However, if we are linking with
1610 -Bsymbolic, we do not need to copy a reloc against a
1611 global symbol which is defined in an object we are
1612 including in the link (i.e., DEF_REGULAR is set). At
1613 this point we have not seen all the input files, so it is
1614 possible that DEF_REGULAR is not set now but will be set
1615 later (it is never cleared). In case of a weak definition,
1616 DEF_REGULAR may be cleared later by a strong definition in
1617 a shared library. We account for that possibility below by
1618 storing information in the relocs_copied field of the hash
1619 table entry. A similar situation occurs when creating
1620 shared libraries and symbol visibility changes render the
1623 If on the other hand, we are creating an executable, we
1624 may need to keep relocations for symbols satisfied by a
1625 dynamic library if we manage to avoid copy relocs for the
1628 && (sec->flags & SEC_ALLOC) != 0
1629 && (r_type != R_386_PC32
1631 && (! SYMBOLIC_BIND (info, h)
1632 || h->root.type == bfd_link_hash_defweak
1633 || !h->def_regular))))
1634 || (ELIMINATE_COPY_RELOCS
1636 && (sec->flags & SEC_ALLOC) != 0
1638 && (h->root.type == bfd_link_hash_defweak
1639 || !h->def_regular)))
1641 struct elf_dyn_relocs *p;
1642 struct elf_dyn_relocs **head;
1644 /* We must copy these reloc types into the output file.
1645 Create a reloc section in dynobj and make room for
1649 if (htab->elf.dynobj == NULL)
1650 htab->elf.dynobj = abfd;
1652 sreloc = _bfd_elf_make_dynamic_reloc_section
1653 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1659 /* If this is a global symbol, we count the number of
1660 relocations we need for this symbol. */
1663 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1667 /* Track dynamic relocs needed for local syms too.
1668 We really need local syms available to do this
1673 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1678 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1682 vpp = &elf_section_data (s)->local_dynrel;
1683 head = (struct elf_dyn_relocs **)vpp;
1687 if (p == NULL || p->sec != sec)
1689 bfd_size_type amt = sizeof *p;
1690 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1702 if (r_type == R_386_PC32)
1707 /* This relocation describes the C++ object vtable hierarchy.
1708 Reconstruct it for later use during GC. */
1709 case R_386_GNU_VTINHERIT:
1710 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1714 /* This relocation describes which C++ vtable entries are actually
1715 used. Record for later use during GC. */
1716 case R_386_GNU_VTENTRY:
1717 BFD_ASSERT (h != NULL);
1719 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1731 /* Return the section that should be marked against GC for a given
1735 elf_i386_gc_mark_hook (asection *sec,
1736 struct bfd_link_info *info,
1737 Elf_Internal_Rela *rel,
1738 struct elf_link_hash_entry *h,
1739 Elf_Internal_Sym *sym)
1742 switch (ELF32_R_TYPE (rel->r_info))
1744 case R_386_GNU_VTINHERIT:
1745 case R_386_GNU_VTENTRY:
1749 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1752 /* Update the got entry reference counts for the section being removed. */
1755 elf_i386_gc_sweep_hook (bfd *abfd,
1756 struct bfd_link_info *info,
1758 const Elf_Internal_Rela *relocs)
1760 Elf_Internal_Shdr *symtab_hdr;
1761 struct elf_link_hash_entry **sym_hashes;
1762 bfd_signed_vma *local_got_refcounts;
1763 const Elf_Internal_Rela *rel, *relend;
1765 if (info->relocatable)
1768 elf_section_data (sec)->local_dynrel = NULL;
1770 symtab_hdr = &elf_symtab_hdr (abfd);
1771 sym_hashes = elf_sym_hashes (abfd);
1772 local_got_refcounts = elf_local_got_refcounts (abfd);
1774 relend = relocs + sec->reloc_count;
1775 for (rel = relocs; rel < relend; rel++)
1777 unsigned long r_symndx;
1778 unsigned int r_type;
1779 struct elf_link_hash_entry *h = NULL;
1781 r_symndx = ELF32_R_SYM (rel->r_info);
1782 if (r_symndx >= symtab_hdr->sh_info)
1784 struct elf_i386_link_hash_entry *eh;
1785 struct elf_dyn_relocs **pp;
1786 struct elf_dyn_relocs *p;
1788 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1789 while (h->root.type == bfd_link_hash_indirect
1790 || h->root.type == bfd_link_hash_warning)
1791 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1792 eh = (struct elf_i386_link_hash_entry *) h;
1794 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1797 /* Everything must go for SEC. */
1803 r_type = ELF32_R_TYPE (rel->r_info);
1804 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1805 symtab_hdr, sym_hashes,
1806 &r_type, GOT_UNKNOWN,
1807 rel, relend, h, r_symndx))
1813 if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1814 elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1818 case R_386_TLS_GOTDESC:
1819 case R_386_TLS_DESC_CALL:
1820 case R_386_TLS_IE_32:
1822 case R_386_TLS_GOTIE:
1826 if (h->got.refcount > 0)
1827 h->got.refcount -= 1;
1829 else if (local_got_refcounts != NULL)
1831 if (local_got_refcounts[r_symndx] > 0)
1832 local_got_refcounts[r_symndx] -= 1;
1845 if (h->plt.refcount > 0)
1846 h->plt.refcount -= 1;
1858 /* Adjust a symbol defined by a dynamic object and referenced by a
1859 regular object. The current definition is in some section of the
1860 dynamic object, but we're not including those sections. We have to
1861 change the definition to something the rest of the link can
1865 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1866 struct elf_link_hash_entry *h)
1868 struct elf_i386_link_hash_table *htab;
1871 /* STT_GNU_IFUNC symbol must go through PLT. */
1872 if (h->type == STT_GNU_IFUNC)
1874 if (h->plt.refcount <= 0)
1876 h->plt.offset = (bfd_vma) -1;
1882 /* If this is a function, put it in the procedure linkage table. We
1883 will fill in the contents of the procedure linkage table later,
1884 when we know the address of the .got section. */
1885 if (h->type == STT_FUNC
1888 if (h->plt.refcount <= 0
1889 || SYMBOL_CALLS_LOCAL (info, h)
1890 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1891 && h->root.type == bfd_link_hash_undefweak))
1893 /* This case can occur if we saw a PLT32 reloc in an input
1894 file, but the symbol was never referred to by a dynamic
1895 object, or if all references were garbage collected. In
1896 such a case, we don't actually need to build a procedure
1897 linkage table, and we can just do a PC32 reloc instead. */
1898 h->plt.offset = (bfd_vma) -1;
1905 /* It's possible that we incorrectly decided a .plt reloc was
1906 needed for an R_386_PC32 reloc to a non-function sym in
1907 check_relocs. We can't decide accurately between function and
1908 non-function syms in check-relocs; Objects loaded later in
1909 the link may change h->type. So fix it now. */
1910 h->plt.offset = (bfd_vma) -1;
1912 /* If this is a weak symbol, and there is a real definition, the
1913 processor independent code will have arranged for us to see the
1914 real definition first, and we can just use the same value. */
1915 if (h->u.weakdef != NULL)
1917 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1918 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1919 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1920 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1921 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1922 h->non_got_ref = h->u.weakdef->non_got_ref;
1926 /* This is a reference to a symbol defined by a dynamic object which
1927 is not a function. */
1929 /* If we are creating a shared library, we must presume that the
1930 only references to the symbol are via the global offset table.
1931 For such cases we need not do anything here; the relocations will
1932 be handled correctly by relocate_section. */
1936 /* If there are no references to this symbol that do not use the
1937 GOT, we don't need to generate a copy reloc. */
1938 if (!h->non_got_ref)
1941 /* If -z nocopyreloc was given, we won't generate them either. */
1942 if (info->nocopyreloc)
1948 htab = elf_i386_hash_table (info);
1950 /* If there aren't any dynamic relocs in read-only sections, then
1951 we can keep the dynamic relocs and avoid the copy reloc. This
1952 doesn't work on VxWorks, where we can not have dynamic relocations
1953 (other than copy and jump slot relocations) in an executable. */
1954 if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
1956 struct elf_i386_link_hash_entry * eh;
1957 struct elf_dyn_relocs *p;
1959 eh = (struct elf_i386_link_hash_entry *) h;
1960 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1962 s = p->sec->output_section;
1963 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1976 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1977 h->root.root.string);
1981 /* We must allocate the symbol in our .dynbss section, which will
1982 become part of the .bss section of the executable. There will be
1983 an entry for this symbol in the .dynsym section. The dynamic
1984 object will contain position independent code, so all references
1985 from the dynamic object to this symbol will go through the global
1986 offset table. The dynamic linker will use the .dynsym entry to
1987 determine the address it must put in the global offset table, so
1988 both the dynamic object and the regular object will refer to the
1989 same memory location for the variable. */
1991 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1992 copy the initial value out of the dynamic object and into the
1993 runtime process image. */
1994 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1996 htab->srelbss->size += sizeof (Elf32_External_Rel);
2002 return _bfd_elf_adjust_dynamic_copy (h, s);
2005 /* Allocate space in .plt, .got and associated reloc sections for
2009 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2011 struct bfd_link_info *info;
2012 struct elf_i386_link_hash_table *htab;
2013 struct elf_i386_link_hash_entry *eh;
2014 struct elf_dyn_relocs *p;
2016 if (h->root.type == bfd_link_hash_indirect)
2019 if (h->root.type == bfd_link_hash_warning)
2020 /* When warning symbols are created, they **replace** the "real"
2021 entry in the hash table, thus we never get to see the real
2022 symbol in a hash traversal. So look at it now. */
2023 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2024 eh = (struct elf_i386_link_hash_entry *) h;
2026 info = (struct bfd_link_info *) inf;
2027 htab = elf_i386_hash_table (info);
2029 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2030 here if it is defined and referenced in a non-shared object. */
2031 if (h->type == STT_GNU_IFUNC
2033 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2036 else if (htab->elf.dynamic_sections_created
2037 && h->plt.refcount > 0)
2039 /* Make sure this symbol is output as a dynamic symbol.
2040 Undefined weak syms won't yet be marked as dynamic. */
2041 if (h->dynindx == -1
2042 && !h->forced_local)
2044 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2049 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2051 asection *s = htab->elf.splt;
2053 /* If this is the first .plt entry, make room for the special
2056 s->size += PLT_ENTRY_SIZE;
2058 h->plt.offset = s->size;
2060 /* If this symbol is not defined in a regular file, and we are
2061 not generating a shared library, then set the symbol to this
2062 location in the .plt. This is required to make function
2063 pointers compare as equal between the normal executable and
2064 the shared library. */
2068 h->root.u.def.section = s;
2069 h->root.u.def.value = h->plt.offset;
2072 /* Make room for this entry. */
2073 s->size += PLT_ENTRY_SIZE;
2075 /* We also need to make an entry in the .got.plt section, which
2076 will be placed in the .got section by the linker script. */
2077 htab->elf.sgotplt->size += 4;
2079 /* We also need to make an entry in the .rel.plt section. */
2080 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2081 htab->next_tls_desc_index++;
2083 if (htab->is_vxworks && !info->shared)
2085 /* VxWorks has a second set of relocations for each PLT entry
2086 in executables. They go in a separate relocation section,
2087 which is processed by the kernel loader. */
2089 /* There are two relocations for the initial PLT entry: an
2090 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2091 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2093 if (h->plt.offset == PLT_ENTRY_SIZE)
2094 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2096 /* There are two extra relocations for each subsequent PLT entry:
2097 an R_386_32 relocation for the GOT entry, and an R_386_32
2098 relocation for the PLT entry. */
2100 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2105 h->plt.offset = (bfd_vma) -1;
2111 h->plt.offset = (bfd_vma) -1;
2115 eh->tlsdesc_got = (bfd_vma) -1;
2117 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2118 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2119 if (h->got.refcount > 0
2122 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2123 h->got.offset = (bfd_vma) -1;
2124 else if (h->got.refcount > 0)
2128 int tls_type = elf_i386_hash_entry(h)->tls_type;
2130 /* Make sure this symbol is output as a dynamic symbol.
2131 Undefined weak syms won't yet be marked as dynamic. */
2132 if (h->dynindx == -1
2133 && !h->forced_local)
2135 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2140 if (GOT_TLS_GDESC_P (tls_type))
2142 eh->tlsdesc_got = htab->elf.sgotplt->size
2143 - elf_i386_compute_jump_table_size (htab);
2144 htab->elf.sgotplt->size += 8;
2145 h->got.offset = (bfd_vma) -2;
2147 if (! GOT_TLS_GDESC_P (tls_type)
2148 || GOT_TLS_GD_P (tls_type))
2150 h->got.offset = s->size;
2152 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2153 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2156 dyn = htab->elf.dynamic_sections_created;
2157 /* R_386_TLS_IE_32 needs one dynamic relocation,
2158 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2159 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2160 need two), R_386_TLS_GD needs one if local symbol and two if
2162 if (tls_type == GOT_TLS_IE_BOTH)
2163 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2164 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2165 || (tls_type & GOT_TLS_IE))
2166 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2167 else if (GOT_TLS_GD_P (tls_type))
2168 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2169 else if (! GOT_TLS_GDESC_P (tls_type)
2170 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2171 || h->root.type != bfd_link_hash_undefweak)
2173 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2174 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2175 if (GOT_TLS_GDESC_P (tls_type))
2176 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2179 h->got.offset = (bfd_vma) -1;
2181 if (eh->dyn_relocs == NULL)
2184 /* In the shared -Bsymbolic case, discard space allocated for
2185 dynamic pc-relative relocs against symbols which turn out to be
2186 defined in regular objects. For the normal shared case, discard
2187 space for pc-relative relocs that have become local due to symbol
2188 visibility changes. */
2192 /* The only reloc that uses pc_count is R_386_PC32, which will
2193 appear on a call or on something like ".long foo - .". We
2194 want calls to protected symbols to resolve directly to the
2195 function rather than going via the plt. If people want
2196 function pointer comparisons to work as expected then they
2197 should avoid writing assembly like ".long foo - .". */
2198 if (SYMBOL_CALLS_LOCAL (info, h))
2200 struct elf_dyn_relocs **pp;
2202 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2204 p->count -= p->pc_count;
2213 if (htab->is_vxworks)
2215 struct elf_dyn_relocs **pp;
2216 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2218 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2225 /* Also discard relocs on undefined weak syms with non-default
2227 if (eh->dyn_relocs != NULL
2228 && h->root.type == bfd_link_hash_undefweak)
2230 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2231 eh->dyn_relocs = NULL;
2233 /* Make sure undefined weak symbols are output as a dynamic
2235 else if (h->dynindx == -1
2236 && !h->forced_local)
2238 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2243 else if (ELIMINATE_COPY_RELOCS)
2245 /* For the non-shared case, discard space for relocs against
2246 symbols which turn out to need copy relocs or are not
2252 || (htab->elf.dynamic_sections_created
2253 && (h->root.type == bfd_link_hash_undefweak
2254 || h->root.type == bfd_link_hash_undefined))))
2256 /* Make sure this symbol is output as a dynamic symbol.
2257 Undefined weak syms won't yet be marked as dynamic. */
2258 if (h->dynindx == -1
2259 && !h->forced_local)
2261 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2265 /* If that succeeded, we know we'll be keeping all the
2267 if (h->dynindx != -1)
2271 eh->dyn_relocs = NULL;
2276 /* Finally, allocate space. */
2277 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2281 sreloc = elf_section_data (p->sec)->sreloc;
2283 BFD_ASSERT (sreloc != NULL);
2284 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2290 /* Allocate space in .plt, .got and associated reloc sections for
2291 local dynamic relocs. */
2294 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2296 struct elf_link_hash_entry *h
2297 = (struct elf_link_hash_entry *) *slot;
2299 if (h->type != STT_GNU_IFUNC
2303 || h->root.type != bfd_link_hash_defined)
2306 return elf_i386_allocate_dynrelocs (h, inf);
2309 /* Find any dynamic relocs that apply to read-only sections. */
2312 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2314 struct elf_i386_link_hash_entry *eh;
2315 struct elf_dyn_relocs *p;
2317 if (h->root.type == bfd_link_hash_warning)
2318 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2320 eh = (struct elf_i386_link_hash_entry *) h;
2321 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2323 asection *s = p->sec->output_section;
2325 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2327 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2329 info->flags |= DF_TEXTREL;
2331 /* Not an error, just cut short the traversal. */
2338 /* Set the sizes of the dynamic sections. */
2341 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2342 struct bfd_link_info *info)
2344 struct elf_i386_link_hash_table *htab;
2350 htab = elf_i386_hash_table (info);
2351 dynobj = htab->elf.dynobj;
2355 if (htab->elf.dynamic_sections_created)
2357 /* Set the contents of the .interp section to the interpreter. */
2358 if (info->executable)
2360 s = bfd_get_section_by_name (dynobj, ".interp");
2363 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2364 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2368 /* Set up .got offsets for local syms, and space for local dynamic
2370 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2372 bfd_signed_vma *local_got;
2373 bfd_signed_vma *end_local_got;
2374 char *local_tls_type;
2375 bfd_vma *local_tlsdesc_gotent;
2376 bfd_size_type locsymcount;
2377 Elf_Internal_Shdr *symtab_hdr;
2380 if (! is_i386_elf (ibfd))
2383 for (s = ibfd->sections; s != NULL; s = s->next)
2385 struct elf_dyn_relocs *p;
2387 for (p = ((struct elf_dyn_relocs *)
2388 elf_section_data (s)->local_dynrel);
2392 if (!bfd_is_abs_section (p->sec)
2393 && bfd_is_abs_section (p->sec->output_section))
2395 /* Input section has been discarded, either because
2396 it is a copy of a linkonce section or due to
2397 linker script /DISCARD/, so we'll be discarding
2400 else if (htab->is_vxworks
2401 && strcmp (p->sec->output_section->name,
2404 /* Relocations in vxworks .tls_vars sections are
2405 handled specially by the loader. */
2407 else if (p->count != 0)
2409 srel = elf_section_data (p->sec)->sreloc;
2410 srel->size += p->count * sizeof (Elf32_External_Rel);
2411 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2412 info->flags |= DF_TEXTREL;
2417 local_got = elf_local_got_refcounts (ibfd);
2421 symtab_hdr = &elf_symtab_hdr (ibfd);
2422 locsymcount = symtab_hdr->sh_info;
2423 end_local_got = local_got + locsymcount;
2424 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2425 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2427 srel = htab->elf.srelgot;
2428 for (; local_got < end_local_got;
2429 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2431 *local_tlsdesc_gotent = (bfd_vma) -1;
2434 if (GOT_TLS_GDESC_P (*local_tls_type))
2436 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2437 - elf_i386_compute_jump_table_size (htab);
2438 htab->elf.sgotplt->size += 8;
2439 *local_got = (bfd_vma) -2;
2441 if (! GOT_TLS_GDESC_P (*local_tls_type)
2442 || GOT_TLS_GD_P (*local_tls_type))
2444 *local_got = s->size;
2446 if (GOT_TLS_GD_P (*local_tls_type)
2447 || *local_tls_type == GOT_TLS_IE_BOTH)
2451 || GOT_TLS_GD_ANY_P (*local_tls_type)
2452 || (*local_tls_type & GOT_TLS_IE))
2454 if (*local_tls_type == GOT_TLS_IE_BOTH)
2455 srel->size += 2 * sizeof (Elf32_External_Rel);
2456 else if (GOT_TLS_GD_P (*local_tls_type)
2457 || ! GOT_TLS_GDESC_P (*local_tls_type))
2458 srel->size += sizeof (Elf32_External_Rel);
2459 if (GOT_TLS_GDESC_P (*local_tls_type))
2460 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2464 *local_got = (bfd_vma) -1;
2468 if (htab->tls_ldm_got.refcount > 0)
2470 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2472 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2473 htab->elf.sgot->size += 8;
2474 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2477 htab->tls_ldm_got.offset = -1;
2479 /* Allocate global sym .plt and .got entries, and space for global
2480 sym dynamic relocs. */
2481 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2483 /* Allocate .plt and .got entries, and space for local symbols. */
2484 htab_traverse (htab->loc_hash_table,
2485 elf_i386_allocate_local_dynrelocs,
2488 /* For every jump slot reserved in the sgotplt, reloc_count is
2489 incremented. However, when we reserve space for TLS descriptors,
2490 it's not incremented, so in order to compute the space reserved
2491 for them, it suffices to multiply the reloc count by the jump
2493 if (htab->elf.srelplt)
2494 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2496 /* We now have determined the sizes of the various dynamic sections.
2497 Allocate memory for them. */
2499 for (s = dynobj->sections; s != NULL; s = s->next)
2501 bfd_boolean strip_section = TRUE;
2503 if ((s->flags & SEC_LINKER_CREATED) == 0)
2506 if (s == htab->elf.splt
2507 || s == htab->elf.sgot
2508 || s == htab->elf.sgotplt
2509 || s == htab->elf.iplt
2510 || s == htab->elf.igotplt
2511 || s == htab->sdynbss)
2513 /* Strip this section if we don't need it; see the
2515 /* We'd like to strip these sections if they aren't needed, but if
2516 we've exported dynamic symbols from them we must leave them.
2517 It's too late to tell BFD to get rid of the symbols. */
2519 if (htab->elf.hplt != NULL)
2520 strip_section = FALSE;
2522 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2525 && s != htab->elf.srelplt
2526 && s != htab->srelplt2)
2529 /* We use the reloc_count field as a counter if we need
2530 to copy relocs into the output file. */
2535 /* It's not one of our sections, so don't allocate space. */
2541 /* If we don't need this section, strip it from the
2542 output file. This is mostly to handle .rel.bss and
2543 .rel.plt. We must create both sections in
2544 create_dynamic_sections, because they must be created
2545 before the linker maps input sections to output
2546 sections. The linker does that before
2547 adjust_dynamic_symbol is called, and it is that
2548 function which decides whether anything needs to go
2549 into these sections. */
2551 s->flags |= SEC_EXCLUDE;
2555 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2558 /* Allocate memory for the section contents. We use bfd_zalloc
2559 here in case unused entries are not reclaimed before the
2560 section's contents are written out. This should not happen,
2561 but this way if it does, we get a R_386_NONE reloc instead
2563 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2564 if (s->contents == NULL)
2568 if (htab->elf.dynamic_sections_created)
2570 /* Add some entries to the .dynamic section. We fill in the
2571 values later, in elf_i386_finish_dynamic_sections, but we
2572 must add the entries now so that we get the correct size for
2573 the .dynamic section. The DT_DEBUG entry is filled in by the
2574 dynamic linker and used by the debugger. */
2575 #define add_dynamic_entry(TAG, VAL) \
2576 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2578 if (info->executable)
2580 if (!add_dynamic_entry (DT_DEBUG, 0))
2584 if (htab->elf.splt->size != 0)
2586 if (!add_dynamic_entry (DT_PLTGOT, 0)
2587 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2588 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2589 || !add_dynamic_entry (DT_JMPREL, 0))
2595 if (!add_dynamic_entry (DT_REL, 0)
2596 || !add_dynamic_entry (DT_RELSZ, 0)
2597 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2600 /* If any dynamic relocs apply to a read-only section,
2601 then we need a DT_TEXTREL entry. */
2602 if ((info->flags & DF_TEXTREL) == 0)
2603 elf_link_hash_traverse (&htab->elf,
2604 elf_i386_readonly_dynrelocs, info);
2606 if ((info->flags & DF_TEXTREL) != 0)
2608 if (!add_dynamic_entry (DT_TEXTREL, 0))
2612 if (htab->is_vxworks
2613 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2616 #undef add_dynamic_entry
2622 elf_i386_always_size_sections (bfd *output_bfd,
2623 struct bfd_link_info *info)
2625 asection *tls_sec = elf_hash_table (info)->tls_sec;
2629 struct elf_link_hash_entry *tlsbase;
2631 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2632 "_TLS_MODULE_BASE_",
2633 FALSE, FALSE, FALSE);
2635 if (tlsbase && tlsbase->type == STT_TLS)
2637 struct bfd_link_hash_entry *bh = NULL;
2638 const struct elf_backend_data *bed
2639 = get_elf_backend_data (output_bfd);
2641 if (!(_bfd_generic_link_add_one_symbol
2642 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2643 tls_sec, 0, NULL, FALSE,
2644 bed->collect, &bh)))
2647 elf_i386_hash_table (info)->tls_module_base = bh;
2649 tlsbase = (struct elf_link_hash_entry *)bh;
2650 tlsbase->def_regular = 1;
2651 tlsbase->other = STV_HIDDEN;
2652 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2659 /* Set the correct type for an x86 ELF section. We do this by the
2660 section name, which is a hack, but ought to work. */
2663 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2664 Elf_Internal_Shdr *hdr,
2669 name = bfd_get_section_name (abfd, sec);
2671 /* This is an ugly, but unfortunately necessary hack that is
2672 needed when producing EFI binaries on x86. It tells
2673 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2674 containing ELF relocation info. We need this hack in order to
2675 be able to generate ELF binaries that can be translated into
2676 EFI applications (which are essentially COFF objects). Those
2677 files contain a COFF ".reloc" section inside an ELFNN object,
2678 which would normally cause BFD to segfault because it would
2679 attempt to interpret this section as containing relocation
2680 entries for section "oc". With this hack enabled, ".reloc"
2681 will be treated as a normal data section, which will avoid the
2682 segfault. However, you won't be able to create an ELFNN binary
2683 with a section named "oc" that needs relocations, but that's
2684 the kind of ugly side-effects you get when detecting section
2685 types based on their names... In practice, this limitation is
2686 unlikely to bite. */
2687 if (strcmp (name, ".reloc") == 0)
2688 hdr->sh_type = SHT_PROGBITS;
2693 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2694 executables. Rather than setting it to the beginning of the TLS
2695 section, we have to set it to the end. This function may be called
2696 multiple times, it is idempotent. */
2699 elf_i386_set_tls_module_base (struct bfd_link_info *info)
2701 struct bfd_link_hash_entry *base;
2703 if (!info->executable)
2706 base = elf_i386_hash_table (info)->tls_module_base;
2711 base->u.def.value = elf_hash_table (info)->tls_size;
2714 /* Return the base VMA address which should be subtracted from real addresses
2715 when resolving @dtpoff relocation.
2716 This is PT_TLS segment p_vaddr. */
2719 elf_i386_dtpoff_base (struct bfd_link_info *info)
2721 /* If tls_sec is NULL, we should have signalled an error already. */
2722 if (elf_hash_table (info)->tls_sec == NULL)
2724 return elf_hash_table (info)->tls_sec->vma;
2727 /* Return the relocation value for @tpoff relocation
2728 if STT_TLS virtual address is ADDRESS. */
2731 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2733 struct elf_link_hash_table *htab = elf_hash_table (info);
2735 /* If tls_sec is NULL, we should have signalled an error already. */
2736 if (htab->tls_sec == NULL)
2738 return htab->tls_size + htab->tls_sec->vma - address;
2741 /* Relocate an i386 ELF section. */
2744 elf_i386_relocate_section (bfd *output_bfd,
2745 struct bfd_link_info *info,
2747 asection *input_section,
2749 Elf_Internal_Rela *relocs,
2750 Elf_Internal_Sym *local_syms,
2751 asection **local_sections)
2753 struct elf_i386_link_hash_table *htab;
2754 Elf_Internal_Shdr *symtab_hdr;
2755 struct elf_link_hash_entry **sym_hashes;
2756 bfd_vma *local_got_offsets;
2757 bfd_vma *local_tlsdesc_gotents;
2758 Elf_Internal_Rela *rel;
2759 Elf_Internal_Rela *relend;
2760 bfd_boolean is_vxworks_tls;
2762 BFD_ASSERT (is_i386_elf (input_bfd));
2764 htab = elf_i386_hash_table (info);
2765 symtab_hdr = &elf_symtab_hdr (input_bfd);
2766 sym_hashes = elf_sym_hashes (input_bfd);
2767 local_got_offsets = elf_local_got_offsets (input_bfd);
2768 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
2769 /* We have to handle relocations in vxworks .tls_vars sections
2770 specially, because the dynamic loader is 'weird'. */
2771 is_vxworks_tls = (htab->is_vxworks && info->shared
2772 && !strcmp (input_section->output_section->name,
2775 elf_i386_set_tls_module_base (info);
2778 relend = relocs + input_section->reloc_count;
2779 for (; rel < relend; rel++)
2781 unsigned int r_type;
2782 reloc_howto_type *howto;
2783 unsigned long r_symndx;
2784 struct elf_link_hash_entry *h;
2785 Elf_Internal_Sym *sym;
2787 bfd_vma off, offplt;
2789 bfd_boolean unresolved_reloc;
2790 bfd_reloc_status_type r;
2794 r_type = ELF32_R_TYPE (rel->r_info);
2795 if (r_type == R_386_GNU_VTINHERIT
2796 || r_type == R_386_GNU_VTENTRY)
2799 if ((indx = r_type) >= R_386_standard
2800 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2801 >= R_386_ext - R_386_standard)
2802 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2803 >= R_386_irelative - R_386_ext))
2805 (*_bfd_error_handler)
2806 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2807 input_bfd, input_section, r_type);
2808 bfd_set_error (bfd_error_bad_value);
2811 howto = elf_howto_table + indx;
2813 r_symndx = ELF32_R_SYM (rel->r_info);
2817 unresolved_reloc = FALSE;
2818 if (r_symndx < symtab_hdr->sh_info)
2820 sym = local_syms + r_symndx;
2821 sec = local_sections[r_symndx];
2822 relocation = (sec->output_section->vma
2823 + sec->output_offset
2826 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2827 && ((sec->flags & SEC_MERGE) != 0
2828 || (info->relocatable
2829 && sec->output_offset != 0)))
2832 bfd_byte *where = contents + rel->r_offset;
2834 switch (howto->size)
2837 addend = bfd_get_8 (input_bfd, where);
2838 if (howto->pc_relative)
2840 addend = (addend ^ 0x80) - 0x80;
2845 addend = bfd_get_16 (input_bfd, where);
2846 if (howto->pc_relative)
2848 addend = (addend ^ 0x8000) - 0x8000;
2853 addend = bfd_get_32 (input_bfd, where);
2854 if (howto->pc_relative)
2856 addend = (addend ^ 0x80000000) - 0x80000000;
2864 if (info->relocatable)
2865 addend += sec->output_offset;
2868 asection *msec = sec;
2869 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2871 addend -= relocation;
2872 addend += msec->output_section->vma + msec->output_offset;
2875 switch (howto->size)
2878 /* FIXME: overflow checks. */
2879 if (howto->pc_relative)
2881 bfd_put_8 (input_bfd, addend, where);
2884 if (howto->pc_relative)
2886 bfd_put_16 (input_bfd, addend, where);
2889 if (howto->pc_relative)
2891 bfd_put_32 (input_bfd, addend, where);
2895 else if (!info->relocatable
2896 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2898 /* Relocate against local STT_GNU_IFUNC symbol. */
2899 h = elf_i386_get_local_sym_hash (htab, input_bfd,
2904 /* Set STT_GNU_IFUNC symbol value. */
2905 h->root.u.def.value = sym->st_value;
2906 h->root.u.def.section = sec;
2913 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2914 r_symndx, symtab_hdr, sym_hashes,
2916 unresolved_reloc, warned);
2919 if (sec != NULL && elf_discarded_section (sec))
2921 /* For relocs against symbols from removed linkonce sections,
2922 or sections discarded by a linker script, we just want the
2923 section contents zeroed. Avoid any special processing. */
2924 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2930 if (info->relocatable)
2933 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2934 it here if it is defined in a non-shared object. */
2936 && h->type == STT_GNU_IFUNC
2939 asection *plt, *gotplt, *base_got;
2943 if ((input_section->flags & SEC_ALLOC) == 0
2944 || h->plt.offset == (bfd_vma) -1)
2947 /* STT_GNU_IFUNC symbol must go through PLT. */
2948 if (htab->elf.splt != NULL)
2950 plt = htab->elf.splt;
2951 gotplt = htab->elf.sgotplt;
2955 plt = htab->elf.iplt;
2956 gotplt = htab->elf.igotplt;
2959 relocation = (plt->output_section->vma
2960 + plt->output_offset + h->plt.offset);
2965 if (h->root.root.string)
2966 name = h->root.root.string;
2968 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
2970 (*_bfd_error_handler)
2971 (_("%B: relocation %s against STT_GNU_IFUNC "
2972 "symbol `%s' isn't handled by %s"), input_bfd,
2973 elf_howto_table[r_type].name,
2974 name, __FUNCTION__);
2975 bfd_set_error (bfd_error_bad_value);
2979 /* Generate dynamic relcoation only when there is a
2980 non-GOF reference in a shared object. */
2981 if (info->shared && h->non_got_ref)
2983 Elf_Internal_Rela outrel;
2988 /* Need a dynamic relocation to get the real function
2990 offset = _bfd_elf_section_offset (output_bfd,
2994 if (offset == (bfd_vma) -1
2995 || offset == (bfd_vma) -2)
2998 outrel.r_offset = (input_section->output_section->vma
2999 + input_section->output_offset
3002 if (h->dynindx == -1
3004 || info->executable)
3006 /* This symbol is resolved locally. */
3007 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3008 bfd_put_32 (output_bfd,
3009 (h->root.u.def.value
3010 + h->root.u.def.section->output_section->vma
3011 + h->root.u.def.section->output_offset),
3015 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3017 sreloc = htab->elf.irelifunc;
3018 loc = sreloc->contents;
3019 loc += (sreloc->reloc_count++
3020 * sizeof (Elf32_External_Rel));
3021 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3023 /* If this reloc is against an external symbol, we
3024 do not want to fiddle with the addend. Otherwise,
3025 we need to include the symbol value so that it
3026 becomes an addend for the dynamic reloc. For an
3027 internal symbol, we have updated addend. */
3036 base_got = htab->elf.sgot;
3037 off = h->got.offset;
3039 if (base_got == NULL)
3042 if (off == (bfd_vma) -1)
3044 /* We can't use h->got.offset here to save state, or
3045 even just remember the offset, as finish_dynamic_symbol
3046 would use that as offset into .got. */
3048 if (htab->elf.splt != NULL)
3050 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3051 off = (plt_index + 3) * 4;
3052 base_got = htab->elf.sgotplt;
3056 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
3057 off = plt_index * 4;
3058 base_got = htab->elf.igotplt;
3061 if (h->dynindx == -1
3065 /* This references the local defitionion. We must
3066 initialize this entry in the global offset table.
3067 Since the offset must always be a multiple of 8,
3068 we use the least significant bit to record
3069 whether we have initialized it already.
3071 When doing a dynamic link, we create a .rela.got
3072 relocation entry to initialize the value. This
3073 is done in the finish_dynamic_symbol routine. */
3078 bfd_put_32 (output_bfd, relocation,
3079 base_got->contents + off);
3086 /* Adjust for static executables. */
3087 if (htab->elf.splt == NULL)
3088 relocation += gotplt->output_offset;
3092 relocation = (base_got->output_section->vma
3093 + base_got->output_offset + off
3094 - gotplt->output_section->vma
3095 - gotplt->output_offset);
3096 /* Adjust for static executables. */
3097 if (htab->elf.splt == NULL)
3098 relocation += gotplt->output_offset;
3104 relocation -= (gotplt->output_section->vma
3105 + gotplt->output_offset);
3113 /* Relocation is to the entry for this symbol in the global
3115 if (htab->elf.sgot == NULL)
3122 off = h->got.offset;
3123 dyn = htab->elf.dynamic_sections_created;
3124 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3126 && SYMBOL_REFERENCES_LOCAL (info, h))
3127 || (ELF_ST_VISIBILITY (h->other)
3128 && h->root.type == bfd_link_hash_undefweak))
3130 /* This is actually a static link, or it is a
3131 -Bsymbolic link and the symbol is defined
3132 locally, or the symbol was forced to be local
3133 because of a version file. We must initialize
3134 this entry in the global offset table. Since the
3135 offset must always be a multiple of 4, we use the
3136 least significant bit to record whether we have
3137 initialized it already.
3139 When doing a dynamic link, we create a .rel.got
3140 relocation entry to initialize the value. This
3141 is done in the finish_dynamic_symbol routine. */
3146 bfd_put_32 (output_bfd, relocation,
3147 htab->elf.sgot->contents + off);
3152 unresolved_reloc = FALSE;
3156 if (local_got_offsets == NULL)
3159 off = local_got_offsets[r_symndx];
3161 /* The offset must always be a multiple of 4. We use
3162 the least significant bit to record whether we have
3163 already generated the necessary reloc. */
3168 bfd_put_32 (output_bfd, relocation,
3169 htab->elf.sgot->contents + off);
3174 Elf_Internal_Rela outrel;
3177 s = htab->elf.srelgot;
3181 outrel.r_offset = (htab->elf.sgot->output_section->vma
3182 + htab->elf.sgot->output_offset
3184 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3186 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
3187 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3190 local_got_offsets[r_symndx] |= 1;
3194 if (off >= (bfd_vma) -2)
3197 relocation = htab->elf.sgot->output_section->vma
3198 + htab->elf.sgot->output_offset + off
3199 - htab->elf.sgotplt->output_section->vma
3200 - htab->elf.sgotplt->output_offset;
3204 /* Relocation is relative to the start of the global offset
3207 /* Check to make sure it isn't a protected function symbol
3208 for shared library since it may not be local when used
3209 as function address. We also need to make sure that a
3210 symbol is defined locally. */
3211 if (info->shared && h)
3213 if (!h->def_regular)
3217 switch (ELF_ST_VISIBILITY (h->other))
3220 v = _("hidden symbol");
3223 v = _("internal symbol");
3226 v = _("protected symbol");
3233 (*_bfd_error_handler)
3234 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3235 input_bfd, v, h->root.root.string);
3236 bfd_set_error (bfd_error_bad_value);
3239 else if (!info->executable
3240 && h->type == STT_FUNC
3241 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3243 (*_bfd_error_handler)
3244 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3245 input_bfd, h->root.root.string);
3246 bfd_set_error (bfd_error_bad_value);
3251 /* Note that sgot is not involved in this
3252 calculation. We always want the start of .got.plt. If we
3253 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3254 permitted by the ABI, we might have to change this
3256 relocation -= htab->elf.sgotplt->output_section->vma
3257 + htab->elf.sgotplt->output_offset;
3261 /* Use global offset table as symbol value. */
3262 relocation = htab->elf.sgotplt->output_section->vma
3263 + htab->elf.sgotplt->output_offset;
3264 unresolved_reloc = FALSE;
3268 /* Relocation is to the entry for this symbol in the
3269 procedure linkage table. */
3271 /* Resolve a PLT32 reloc against a local symbol directly,
3272 without using the procedure linkage table. */
3276 if (h->plt.offset == (bfd_vma) -1
3277 || htab->elf.splt == NULL)
3279 /* We didn't make a PLT entry for this symbol. This
3280 happens when statically linking PIC code, or when
3281 using -Bsymbolic. */
3285 relocation = (htab->elf.splt->output_section->vma
3286 + htab->elf.splt->output_offset
3288 unresolved_reloc = FALSE;
3293 if ((input_section->flags & SEC_ALLOC) == 0
3299 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3300 || h->root.type != bfd_link_hash_undefweak)
3301 && (r_type != R_386_PC32
3302 || !SYMBOL_CALLS_LOCAL (info, h)))
3303 || (ELIMINATE_COPY_RELOCS
3310 || h->root.type == bfd_link_hash_undefweak
3311 || h->root.type == bfd_link_hash_undefined)))
3313 Elf_Internal_Rela outrel;
3315 bfd_boolean skip, relocate;
3318 /* When generating a shared object, these relocations
3319 are copied into the output file to be resolved at run
3326 _bfd_elf_section_offset (output_bfd, info, input_section,
3328 if (outrel.r_offset == (bfd_vma) -1)
3330 else if (outrel.r_offset == (bfd_vma) -2)
3331 skip = TRUE, relocate = TRUE;
3332 outrel.r_offset += (input_section->output_section->vma
3333 + input_section->output_offset);
3336 memset (&outrel, 0, sizeof outrel);
3339 && (r_type == R_386_PC32
3341 || !SYMBOLIC_BIND (info, h)
3342 || !h->def_regular))
3343 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3346 /* This symbol is local, or marked to become local. */
3348 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3351 sreloc = elf_section_data (input_section)->sreloc;
3353 BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL);
3355 loc = sreloc->contents;
3356 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3358 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3360 /* If this reloc is against an external symbol, we do
3361 not want to fiddle with the addend. Otherwise, we
3362 need to include the symbol value so that it becomes
3363 an addend for the dynamic reloc. */
3370 if (!info->executable)
3372 Elf_Internal_Rela outrel;
3376 outrel.r_offset = rel->r_offset
3377 + input_section->output_section->vma
3378 + input_section->output_offset;
3379 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3380 sreloc = elf_section_data (input_section)->sreloc;
3383 loc = sreloc->contents;
3384 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3385 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3390 case R_386_TLS_GOTDESC:
3391 case R_386_TLS_DESC_CALL:
3392 case R_386_TLS_IE_32:
3393 case R_386_TLS_GOTIE:
3394 tls_type = GOT_UNKNOWN;
3395 if (h == NULL && local_got_offsets)
3396 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3398 tls_type = elf_i386_hash_entry(h)->tls_type;
3399 if (tls_type == GOT_TLS_IE)
3400 tls_type = GOT_TLS_IE_NEG;
3402 if (! elf_i386_tls_transition (info, input_bfd,
3403 input_section, contents,
3404 symtab_hdr, sym_hashes,
3405 &r_type, tls_type, rel,
3406 relend, h, r_symndx))
3409 if (r_type == R_386_TLS_LE_32)
3411 BFD_ASSERT (! unresolved_reloc);
3412 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3417 /* GD->LE transition. */
3418 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3421 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3423 movl %gs:0, %eax; subl $foo@tpoff, %eax
3424 (6 byte form of subl). */
3425 memcpy (contents + rel->r_offset - 3,
3426 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3427 roff = rel->r_offset + 5;
3431 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3433 movl %gs:0, %eax; subl $foo@tpoff, %eax
3434 (6 byte form of subl). */
3435 memcpy (contents + rel->r_offset - 2,
3436 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3437 roff = rel->r_offset + 6;
3439 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3441 /* Skip R_386_PC32/R_386_PLT32. */
3445 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3447 /* GDesc -> LE transition.
3448 It's originally something like:
3449 leal x@tlsdesc(%ebx), %eax
3453 Registers other than %eax may be set up here. */
3458 roff = rel->r_offset;
3459 val = bfd_get_8 (input_bfd, contents + roff - 1);
3461 /* Now modify the instruction as appropriate. */
3462 /* aoliva FIXME: remove the above and xor the byte
3464 bfd_put_8 (output_bfd, val ^ 0x86,
3465 contents + roff - 1);
3466 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3470 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3472 /* GDesc -> LE transition.
3480 roff = rel->r_offset;
3481 bfd_put_8 (output_bfd, 0x66, contents + roff);
3482 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3485 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3489 /* IE->LE transition:
3490 Originally it can be one of:
3498 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3501 /* movl foo, %eax. */
3502 bfd_put_8 (output_bfd, 0xb8,
3503 contents + rel->r_offset - 1);
3509 type = bfd_get_8 (input_bfd,
3510 contents + rel->r_offset - 2);
3515 bfd_put_8 (output_bfd, 0xc7,
3516 contents + rel->r_offset - 2);
3517 bfd_put_8 (output_bfd,
3518 0xc0 | ((val >> 3) & 7),
3519 contents + rel->r_offset - 1);
3523 bfd_put_8 (output_bfd, 0x81,
3524 contents + rel->r_offset - 2);
3525 bfd_put_8 (output_bfd,
3526 0xc0 | ((val >> 3) & 7),
3527 contents + rel->r_offset - 1);
3534 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3535 contents + rel->r_offset);
3540 unsigned int val, type;
3542 /* {IE_32,GOTIE}->LE transition:
3543 Originally it can be one of:
3544 subl foo(%reg1), %reg2
3545 movl foo(%reg1), %reg2
3546 addl foo(%reg1), %reg2
3549 movl $foo, %reg2 (6 byte form)
3550 addl $foo, %reg2. */
3551 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3552 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3556 bfd_put_8 (output_bfd, 0xc7,
3557 contents + rel->r_offset - 2);
3558 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3559 contents + rel->r_offset - 1);
3561 else if (type == 0x2b)
3564 bfd_put_8 (output_bfd, 0x81,
3565 contents + rel->r_offset - 2);
3566 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3567 contents + rel->r_offset - 1);
3569 else if (type == 0x03)
3572 bfd_put_8 (output_bfd, 0x81,
3573 contents + rel->r_offset - 2);
3574 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3575 contents + rel->r_offset - 1);
3579 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3580 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3581 contents + rel->r_offset);
3583 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3584 contents + rel->r_offset);
3589 if (htab->elf.sgot == NULL)
3594 off = h->got.offset;
3595 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
3599 if (local_got_offsets == NULL)
3602 off = local_got_offsets[r_symndx];
3603 offplt = local_tlsdesc_gotents[r_symndx];
3610 Elf_Internal_Rela outrel;
3615 if (htab->elf.srelgot == NULL)
3618 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3620 if (GOT_TLS_GDESC_P (tls_type))
3622 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3623 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3624 <= htab->elf.sgotplt->size);
3625 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3626 + htab->elf.sgotplt->output_offset
3628 + htab->sgotplt_jump_table_size);
3629 sreloc = htab->elf.srelplt;
3630 loc = sreloc->contents;
3631 loc += (htab->next_tls_desc_index++
3632 * sizeof (Elf32_External_Rel));
3633 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3634 <= sreloc->contents + sreloc->size);
3635 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3638 BFD_ASSERT (! unresolved_reloc);
3639 bfd_put_32 (output_bfd,
3640 relocation - elf_i386_dtpoff_base (info),
3641 htab->elf.sgotplt->contents + offplt
3642 + htab->sgotplt_jump_table_size + 4);
3646 bfd_put_32 (output_bfd, 0,
3647 htab->elf.sgotplt->contents + offplt
3648 + htab->sgotplt_jump_table_size + 4);
3652 sreloc = htab->elf.srelgot;
3654 outrel.r_offset = (htab->elf.sgot->output_section->vma
3655 + htab->elf.sgot->output_offset + off);
3657 if (GOT_TLS_GD_P (tls_type))
3658 dr_type = R_386_TLS_DTPMOD32;
3659 else if (GOT_TLS_GDESC_P (tls_type))
3661 else if (tls_type == GOT_TLS_IE_POS)
3662 dr_type = R_386_TLS_TPOFF;
3664 dr_type = R_386_TLS_TPOFF32;
3666 if (dr_type == R_386_TLS_TPOFF && indx == 0)
3667 bfd_put_32 (output_bfd,
3668 relocation - elf_i386_dtpoff_base (info),
3669 htab->elf.sgot->contents + off);
3670 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3671 bfd_put_32 (output_bfd,
3672 elf_i386_dtpoff_base (info) - relocation,
3673 htab->elf.sgot->contents + off);
3674 else if (dr_type != R_386_TLS_DESC)
3675 bfd_put_32 (output_bfd, 0,
3676 htab->elf.sgot->contents + off);
3677 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3679 loc = sreloc->contents;
3680 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3681 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3682 <= sreloc->contents + sreloc->size);
3683 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3685 if (GOT_TLS_GD_P (tls_type))
3689 BFD_ASSERT (! unresolved_reloc);
3690 bfd_put_32 (output_bfd,
3691 relocation - elf_i386_dtpoff_base (info),
3692 htab->elf.sgot->contents + off + 4);
3696 bfd_put_32 (output_bfd, 0,
3697 htab->elf.sgot->contents + off + 4);
3698 outrel.r_info = ELF32_R_INFO (indx,
3699 R_386_TLS_DTPOFF32);
3700 outrel.r_offset += 4;
3701 sreloc->reloc_count++;
3702 loc += sizeof (Elf32_External_Rel);
3703 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3704 <= sreloc->contents + sreloc->size);
3705 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3708 else if (tls_type == GOT_TLS_IE_BOTH)
3710 bfd_put_32 (output_bfd,
3712 ? relocation - elf_i386_dtpoff_base (info)
3714 htab->elf.sgot->contents + off + 4);
3715 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3716 outrel.r_offset += 4;
3717 sreloc->reloc_count++;
3718 loc += sizeof (Elf32_External_Rel);
3719 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3726 local_got_offsets[r_symndx] |= 1;
3729 if (off >= (bfd_vma) -2
3730 && ! GOT_TLS_GDESC_P (tls_type))
3732 if (r_type == R_386_TLS_GOTDESC
3733 || r_type == R_386_TLS_DESC_CALL)
3735 relocation = htab->sgotplt_jump_table_size + offplt;
3736 unresolved_reloc = FALSE;
3738 else if (r_type == ELF32_R_TYPE (rel->r_info))
3740 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3741 + htab->elf.sgotplt->output_offset;
3742 relocation = htab->elf.sgot->output_section->vma
3743 + htab->elf.sgot->output_offset + off - g_o_t;
3744 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3745 && tls_type == GOT_TLS_IE_BOTH)
3747 if (r_type == R_386_TLS_IE)
3748 relocation += g_o_t;
3749 unresolved_reloc = FALSE;
3751 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3753 unsigned int val, type;
3756 /* GD->IE transition. */
3757 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3758 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3761 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3763 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3765 roff = rel->r_offset - 3;
3769 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3771 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3772 roff = rel->r_offset - 2;
3774 memcpy (contents + roff,
3775 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3776 contents[roff + 7] = 0x80 | (val & 7);
3777 /* If foo is used only with foo@gotntpoff(%reg) and
3778 foo@indntpoff, but not with foo@gottpoff(%reg), change
3779 subl $foo@gottpoff(%reg), %eax
3781 addl $foo@gotntpoff(%reg), %eax. */
3782 if (tls_type == GOT_TLS_IE_POS)
3783 contents[roff + 6] = 0x03;
3784 bfd_put_32 (output_bfd,
3785 htab->elf.sgot->output_section->vma
3786 + htab->elf.sgot->output_offset + off
3787 - htab->elf.sgotplt->output_section->vma
3788 - htab->elf.sgotplt->output_offset,
3789 contents + roff + 8);
3790 /* Skip R_386_PLT32. */
3794 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3796 /* GDesc -> IE transition.
3797 It's originally something like:
3798 leal x@tlsdesc(%ebx), %eax
3801 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3803 movl x@gottpoff(%ebx), %eax # before negl %eax
3805 Registers other than %eax may be set up here. */
3809 /* First, make sure it's a leal adding ebx to a 32-bit
3810 offset into any register, although it's probably
3811 almost always going to be eax. */
3812 roff = rel->r_offset;
3814 /* Now modify the instruction as appropriate. */
3815 /* To turn a leal into a movl in the form we use it, it
3816 suffices to change the first byte from 0x8d to 0x8b.
3817 aoliva FIXME: should we decide to keep the leal, all
3818 we have to do is remove the statement below, and
3819 adjust the relaxation of R_386_TLS_DESC_CALL. */
3820 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3822 if (tls_type == GOT_TLS_IE_BOTH)
3825 bfd_put_32 (output_bfd,
3826 htab->elf.sgot->output_section->vma
3827 + htab->elf.sgot->output_offset + off
3828 - htab->elf.sgotplt->output_section->vma
3829 - htab->elf.sgotplt->output_offset,
3833 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3835 /* GDesc -> IE transition.
3843 depending on how we transformed the TLS_GOTDESC above.
3848 roff = rel->r_offset;
3850 /* Now modify the instruction as appropriate. */
3851 if (tls_type != GOT_TLS_IE_NEG)
3854 bfd_put_8 (output_bfd, 0x66, contents + roff);
3855 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3860 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3861 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3871 if (! elf_i386_tls_transition (info, input_bfd,
3872 input_section, contents,
3873 symtab_hdr, sym_hashes,
3874 &r_type, GOT_UNKNOWN, rel,
3875 relend, h, r_symndx))
3878 if (r_type != R_386_TLS_LDM)
3880 /* LD->LE transition:
3881 leal foo(%reg), %eax; call ___tls_get_addr.
3883 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3884 BFD_ASSERT (r_type == R_386_TLS_LE_32);
3885 memcpy (contents + rel->r_offset - 2,
3886 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3887 /* Skip R_386_PC32/R_386_PLT32. */
3892 if (htab->elf.sgot == NULL)
3895 off = htab->tls_ldm_got.offset;
3900 Elf_Internal_Rela outrel;
3903 if (htab->elf.srelgot == NULL)
3906 outrel.r_offset = (htab->elf.sgot->output_section->vma
3907 + htab->elf.sgot->output_offset + off);
3909 bfd_put_32 (output_bfd, 0,
3910 htab->elf.sgot->contents + off);
3911 bfd_put_32 (output_bfd, 0,
3912 htab->elf.sgot->contents + off + 4);
3913 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
3914 loc = htab->elf.srelgot->contents;
3915 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
3916 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3917 htab->tls_ldm_got.offset |= 1;
3919 relocation = htab->elf.sgot->output_section->vma
3920 + htab->elf.sgot->output_offset + off
3921 - htab->elf.sgotplt->output_section->vma
3922 - htab->elf.sgotplt->output_offset;
3923 unresolved_reloc = FALSE;
3926 case R_386_TLS_LDO_32:
3927 if (info->shared || (input_section->flags & SEC_CODE) == 0)
3928 relocation -= elf_i386_dtpoff_base (info);
3930 /* When converting LDO to LE, we must negate. */
3931 relocation = -elf_i386_tpoff (info, relocation);
3934 case R_386_TLS_LE_32:
3936 if (!info->executable)
3938 Elf_Internal_Rela outrel;
3942 outrel.r_offset = rel->r_offset
3943 + input_section->output_section->vma
3944 + input_section->output_offset;
3945 if (h != NULL && h->dynindx != -1)
3949 if (r_type == R_386_TLS_LE_32)
3950 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3952 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3953 sreloc = elf_section_data (input_section)->sreloc;
3956 loc = sreloc->contents;
3957 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3958 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3961 else if (r_type == R_386_TLS_LE_32)
3962 relocation = elf_i386_dtpoff_base (info) - relocation;
3964 relocation -= elf_i386_dtpoff_base (info);
3966 else if (r_type == R_386_TLS_LE_32)
3967 relocation = elf_i386_tpoff (info, relocation);
3969 relocation = -elf_i386_tpoff (info, relocation);
3976 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3977 because such sections are not SEC_ALLOC and thus ld.so will
3978 not process them. */
3979 if (unresolved_reloc
3980 && !((input_section->flags & SEC_DEBUGGING) != 0
3983 (*_bfd_error_handler)
3984 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3987 (long) rel->r_offset,
3989 h->root.root.string);
3994 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3995 contents, rel->r_offset,
3998 if (r != bfd_reloc_ok)
4003 name = h->root.root.string;
4006 name = bfd_elf_string_from_elf_section (input_bfd,
4007 symtab_hdr->sh_link,
4012 name = bfd_section_name (input_bfd, sec);
4015 if (r == bfd_reloc_overflow)
4017 if (! ((*info->callbacks->reloc_overflow)
4018 (info, (h ? &h->root : NULL), name, howto->name,
4019 (bfd_vma) 0, input_bfd, input_section,
4025 (*_bfd_error_handler)
4026 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4027 input_bfd, input_section,
4028 (long) rel->r_offset, name, (int) r);
4037 /* Finish up dynamic symbol handling. We set the contents of various
4038 dynamic sections here. */
4041 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4042 struct bfd_link_info *info,
4043 struct elf_link_hash_entry *h,
4044 Elf_Internal_Sym *sym)
4046 struct elf_i386_link_hash_table *htab;
4048 htab = elf_i386_hash_table (info);
4050 if (h->plt.offset != (bfd_vma) -1)
4054 Elf_Internal_Rela rel;
4056 asection *plt, *gotplt, *relplt;
4058 /* When building a static executable, use .iplt, .igot.plt and
4059 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4060 if (htab->elf.splt != NULL)
4062 plt = htab->elf.splt;
4063 gotplt = htab->elf.sgotplt;
4064 relplt = htab->elf.srelplt;
4068 plt = htab->elf.iplt;
4069 gotplt = htab->elf.igotplt;
4070 relplt = htab->elf.irelplt;
4073 /* This symbol has an entry in the procedure linkage table. Set
4076 if ((h->dynindx == -1
4077 && !((h->forced_local || info->executable)
4079 && h->type == STT_GNU_IFUNC))
4085 /* Get the index in the procedure linkage table which
4086 corresponds to this symbol. This is the index of this symbol
4087 in all the symbols for which we are making plt entries. The
4088 first entry in the procedure linkage table is reserved.
4090 Get the offset into the .got table of the entry that
4091 corresponds to this function. Each .got entry is 4 bytes.
4092 The first three are reserved.
4094 For static executables, we don't reserve anything. */
4096 if (plt == htab->elf.splt)
4098 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
4099 got_offset = (plt_index + 3) * 4;
4103 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
4104 got_offset = plt_index * 4;
4107 /* Fill in the entry in the procedure linkage table. */
4110 memcpy (plt->contents + h->plt.offset, elf_i386_plt_entry,
4112 bfd_put_32 (output_bfd,
4113 (gotplt->output_section->vma
4114 + gotplt->output_offset
4116 plt->contents + h->plt.offset + 2);
4118 if (htab->is_vxworks)
4120 int s, k, reloc_index;
4122 /* Create the R_386_32 relocation referencing the GOT
4123 for this PLT entry. */
4125 /* S: Current slot number (zero-based). */
4126 s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
4127 /* K: Number of relocations for PLTResolve. */
4129 k = PLTRESOLVE_RELOCS_SHLIB;
4131 k = PLTRESOLVE_RELOCS;
4132 /* Skip the PLTresolve relocations, and the relocations for
4133 the other PLT slots. */
4134 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4135 loc = (htab->srelplt2->contents + reloc_index
4136 * sizeof (Elf32_External_Rel));
4138 rel.r_offset = (htab->elf.splt->output_section->vma
4139 + htab->elf.splt->output_offset
4140 + h->plt.offset + 2),
4141 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4142 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4144 /* Create the R_386_32 relocation referencing the beginning of
4145 the PLT for this GOT entry. */
4146 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4147 + htab->elf.sgotplt->output_offset
4149 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4150 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4151 loc + sizeof (Elf32_External_Rel));
4156 memcpy (plt->contents + h->plt.offset, elf_i386_pic_plt_entry,
4158 bfd_put_32 (output_bfd, got_offset,
4159 plt->contents + h->plt.offset + 2);
4162 /* Don't fill PLT entry for static executables. */
4163 if (plt == htab->elf.splt)
4165 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4166 plt->contents + h->plt.offset + 7);
4167 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
4168 plt->contents + h->plt.offset + 12);
4171 /* Fill in the entry in the global offset table. */
4172 bfd_put_32 (output_bfd,
4173 (plt->output_section->vma
4174 + plt->output_offset
4177 gotplt->contents + got_offset);
4179 /* Fill in the entry in the .rel.plt section. */
4180 rel.r_offset = (gotplt->output_section->vma
4181 + gotplt->output_offset
4183 if (h->dynindx == -1
4184 || ((info->executable
4185 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4187 && h->type == STT_GNU_IFUNC))
4189 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4190 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4191 in the .got.plt section. */
4192 bfd_put_32 (output_bfd,
4193 (h->root.u.def.value
4194 + h->root.u.def.section->output_section->vma
4195 + h->root.u.def.section->output_offset),
4196 gotplt->contents + got_offset);
4197 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4200 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4201 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4202 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4204 if (!h->def_regular)
4206 /* Mark the symbol as undefined, rather than as defined in
4207 the .plt section. Leave the value if there were any
4208 relocations where pointer equality matters (this is a clue
4209 for the dynamic linker, to make function pointer
4210 comparisons work between an application and shared
4211 library), otherwise set it to zero. If a function is only
4212 called from a binary, there is no need to slow down
4213 shared libraries because of that. */
4214 sym->st_shndx = SHN_UNDEF;
4215 if (!h->pointer_equality_needed)
4220 if (h->got.offset != (bfd_vma) -1
4221 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4222 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4224 Elf_Internal_Rela rel;
4227 /* This symbol has an entry in the global offset table. Set it
4230 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4233 rel.r_offset = (htab->elf.sgot->output_section->vma
4234 + htab->elf.sgot->output_offset
4235 + (h->got.offset & ~(bfd_vma) 1));
4237 /* If this is a static link, or it is a -Bsymbolic link and the
4238 symbol is defined locally or was forced to be local because
4239 of a version file, we just want to emit a RELATIVE reloc.
4240 The entry in the global offset table will already have been
4241 initialized in the relocate_section function. */
4243 && h->type == STT_GNU_IFUNC)
4247 /* Generate R_386_GLOB_DAT. */
4254 if (!h->pointer_equality_needed)
4257 /* For non-shared object, we can't use .got.plt, which
4258 contains the real function addres if we need pointer
4259 equality. We load the GOT entry with the PLT entry. */
4260 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4261 bfd_put_32 (output_bfd,
4262 (plt->output_section->vma
4263 + plt->output_offset + h->plt.offset),
4264 htab->elf.sgot->contents + h->got.offset);
4268 else if (info->shared
4269 && SYMBOL_REFERENCES_LOCAL (info, h))
4271 BFD_ASSERT((h->got.offset & 1) != 0);
4272 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4276 BFD_ASSERT((h->got.offset & 1) == 0);
4278 bfd_put_32 (output_bfd, (bfd_vma) 0,
4279 htab->elf.sgot->contents + h->got.offset);
4280 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4283 loc = htab->elf.srelgot->contents;
4284 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4285 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4290 Elf_Internal_Rela rel;
4293 /* This symbol needs a copy reloc. Set it up. */
4295 if (h->dynindx == -1
4296 || (h->root.type != bfd_link_hash_defined
4297 && h->root.type != bfd_link_hash_defweak)
4298 || htab->srelbss == NULL)
4301 rel.r_offset = (h->root.u.def.value
4302 + h->root.u.def.section->output_section->vma
4303 + h->root.u.def.section->output_offset);
4304 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4305 loc = htab->srelbss->contents;
4306 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
4307 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4310 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
4311 be NULL for local symbols.
4313 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4314 is relative to the ".got" section. */
4316 && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4317 || (!htab->is_vxworks && h == htab->elf.hgot)))
4318 sym->st_shndx = SHN_ABS;
4323 /* Finish up local dynamic symbol handling. We set the contents of
4324 various dynamic sections here. */
4327 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4329 struct elf_link_hash_entry *h
4330 = (struct elf_link_hash_entry *) *slot;
4331 struct bfd_link_info *info
4332 = (struct bfd_link_info *) inf;
4334 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4338 /* Used to decide how to sort relocs in an optimal manner for the
4339 dynamic linker, before writing them out. */
4341 static enum elf_reloc_type_class
4342 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
4344 switch (ELF32_R_TYPE (rela->r_info))
4346 case R_386_RELATIVE:
4347 return reloc_class_relative;
4348 case R_386_JUMP_SLOT:
4349 return reloc_class_plt;
4351 return reloc_class_copy;
4353 return reloc_class_normal;
4357 /* Finish up the dynamic sections. */
4360 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4361 struct bfd_link_info *info)
4363 struct elf_i386_link_hash_table *htab;
4367 htab = elf_i386_hash_table (info);
4368 dynobj = htab->elf.dynobj;
4369 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4371 if (htab->elf.dynamic_sections_created)
4373 Elf32_External_Dyn *dyncon, *dynconend;
4375 if (sdyn == NULL || htab->elf.sgot == NULL)
4378 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4379 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4380 for (; dyncon < dynconend; dyncon++)
4382 Elf_Internal_Dyn dyn;
4385 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4390 if (htab->is_vxworks
4391 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4396 s = htab->elf.sgotplt;
4397 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4401 s = htab->elf.srelplt;
4402 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4406 s = htab->elf.srelplt;
4407 dyn.d_un.d_val = s->size;
4411 /* My reading of the SVR4 ABI indicates that the
4412 procedure linkage table relocs (DT_JMPREL) should be
4413 included in the overall relocs (DT_REL). This is
4414 what Solaris does. However, UnixWare can not handle
4415 that case. Therefore, we override the DT_RELSZ entry
4416 here to make it not include the JMPREL relocs. */
4417 s = htab->elf.srelplt;
4420 dyn.d_un.d_val -= s->size;
4424 /* We may not be using the standard ELF linker script.
4425 If .rel.plt is the first .rel section, we adjust
4426 DT_REL to not include it. */
4427 s = htab->elf.srelplt;
4430 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4432 dyn.d_un.d_ptr += s->size;
4436 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4439 /* Fill in the first entry in the procedure linkage table. */
4440 if (htab->elf.splt && htab->elf.splt->size > 0)
4444 memcpy (htab->elf.splt->contents, elf_i386_pic_plt0_entry,
4445 sizeof (elf_i386_pic_plt0_entry));
4446 memset (htab->elf.splt->contents + sizeof (elf_i386_pic_plt0_entry),
4447 htab->plt0_pad_byte,
4448 PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
4452 memcpy (htab->elf.splt->contents, elf_i386_plt0_entry,
4453 sizeof(elf_i386_plt0_entry));
4454 memset (htab->elf.splt->contents + sizeof (elf_i386_plt0_entry),
4455 htab->plt0_pad_byte,
4456 PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
4457 bfd_put_32 (output_bfd,
4458 (htab->elf.sgotplt->output_section->vma
4459 + htab->elf.sgotplt->output_offset
4461 htab->elf.splt->contents + 2);
4462 bfd_put_32 (output_bfd,
4463 (htab->elf.sgotplt->output_section->vma
4464 + htab->elf.sgotplt->output_offset
4466 htab->elf.splt->contents + 8);
4468 if (htab->is_vxworks)
4470 Elf_Internal_Rela rel;
4472 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4473 On IA32 we use REL relocations so the addend goes in
4474 the PLT directly. */
4475 rel.r_offset = (htab->elf.splt->output_section->vma
4476 + htab->elf.splt->output_offset
4478 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4479 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4480 htab->srelplt2->contents);
4481 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4482 rel.r_offset = (htab->elf.splt->output_section->vma
4483 + htab->elf.splt->output_offset
4485 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4486 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4487 htab->srelplt2->contents +
4488 sizeof (Elf32_External_Rel));
4492 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4493 really seem like the right value. */
4494 elf_section_data (htab->elf.splt->output_section)
4495 ->this_hdr.sh_entsize = 4;
4497 /* Correct the .rel.plt.unloaded relocations. */
4498 if (htab->is_vxworks && !info->shared)
4500 int num_plts = (htab->elf.splt->size / PLT_ENTRY_SIZE) - 1;
4503 p = htab->srelplt2->contents;
4505 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4507 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4509 for (; num_plts; num_plts--)
4511 Elf_Internal_Rela rel;
4512 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4513 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4514 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4515 p += sizeof (Elf32_External_Rel);
4517 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4518 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4519 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4520 p += sizeof (Elf32_External_Rel);
4526 if (htab->elf.sgotplt)
4528 /* Fill in the first three entries in the global offset table. */
4529 if (htab->elf.sgotplt->size > 0)
4531 bfd_put_32 (output_bfd,
4533 : sdyn->output_section->vma + sdyn->output_offset),
4534 htab->elf.sgotplt->contents);
4535 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4536 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
4539 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
4542 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4543 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
4545 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4546 htab_traverse (htab->loc_hash_table,
4547 elf_i386_finish_local_dynamic_symbol,
4553 /* Return address for Ith PLT stub in section PLT, for relocation REL
4554 or (bfd_vma) -1 if it should not be included. */
4557 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
4558 const arelent *rel ATTRIBUTE_UNUSED)
4560 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4563 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4566 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
4568 if (h->plt.offset != (bfd_vma) -1
4570 && !h->pointer_equality_needed)
4573 return _bfd_elf_hash_symbol (h);
4576 /* Hook called by the linker routine which adds symbols from an object
4580 elf_i386_add_symbol_hook (bfd * abfd ATTRIBUTE_UNUSED,
4581 struct bfd_link_info * info ATTRIBUTE_UNUSED,
4582 Elf_Internal_Sym * sym,
4583 const char ** namep ATTRIBUTE_UNUSED,
4584 flagword * flagsp ATTRIBUTE_UNUSED,
4585 asection ** secp ATTRIBUTE_UNUSED,
4586 bfd_vma * valp ATTRIBUTE_UNUSED)
4588 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4589 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4594 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
4595 #define TARGET_LITTLE_NAME "elf32-i386"
4596 #define ELF_ARCH bfd_arch_i386
4597 #define ELF_MACHINE_CODE EM_386
4598 #define ELF_MAXPAGESIZE 0x1000
4600 #define elf_backend_can_gc_sections 1
4601 #define elf_backend_can_refcount 1
4602 #define elf_backend_want_got_plt 1
4603 #define elf_backend_plt_readonly 1
4604 #define elf_backend_want_plt_sym 0
4605 #define elf_backend_got_header_size 12
4607 /* Support RELA for objdump of prelink objects. */
4608 #define elf_info_to_howto elf_i386_info_to_howto_rel
4609 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4611 #define bfd_elf32_mkobject elf_i386_mkobject
4613 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4614 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
4615 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
4616 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4617 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4619 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4620 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4621 #define elf_backend_check_relocs elf_i386_check_relocs
4622 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
4623 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
4624 #define elf_backend_fake_sections elf_i386_fake_sections
4625 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4626 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4627 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4628 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
4629 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4630 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4631 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4632 #define elf_backend_relocate_section elf_i386_relocate_section
4633 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4634 #define elf_backend_always_size_sections elf_i386_always_size_sections
4635 #define elf_backend_omit_section_dynsym \
4636 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4637 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
4638 #define elf_backend_hash_symbol elf_i386_hash_symbol
4639 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
4640 #undef elf_backend_post_process_headers
4641 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4643 #include "elf32-target.h"
4645 /* FreeBSD support. */
4647 #undef TARGET_LITTLE_SYM
4648 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4649 #undef TARGET_LITTLE_NAME
4650 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4652 #define ELF_OSABI ELFOSABI_FREEBSD
4654 /* The kernel recognizes executables as valid only if they carry a
4655 "FreeBSD" label in the ELF header. So we put this label on all
4656 executables and (for simplicity) also all other object files. */
4659 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
4661 _bfd_elf_set_osabi (abfd, info);
4663 #ifdef OLD_FREEBSD_ABI_LABEL
4664 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4665 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4669 #undef elf_backend_post_process_headers
4670 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4672 #define elf32_bed elf32_i386_fbsd_bed
4674 #undef elf_backend_add_symbol_hook
4676 #include "elf32-target.h"
4678 /* VxWorks support. */
4680 #undef TARGET_LITTLE_SYM
4681 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4682 #undef TARGET_LITTLE_NAME
4683 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4686 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4688 static struct bfd_link_hash_table *
4689 elf_i386_vxworks_link_hash_table_create (bfd *abfd)
4691 struct bfd_link_hash_table *ret;
4692 struct elf_i386_link_hash_table *htab;
4694 ret = elf_i386_link_hash_table_create (abfd);
4697 htab = (struct elf_i386_link_hash_table *) ret;
4698 htab->is_vxworks = 1;
4699 htab->plt0_pad_byte = 0x90;
4706 #undef elf_backend_relocs_compatible
4707 #undef elf_backend_post_process_headers
4708 #undef bfd_elf32_bfd_link_hash_table_create
4709 #define bfd_elf32_bfd_link_hash_table_create \
4710 elf_i386_vxworks_link_hash_table_create
4711 #undef elf_backend_add_symbol_hook
4712 #define elf_backend_add_symbol_hook \
4713 elf_vxworks_add_symbol_hook
4714 #undef elf_backend_link_output_symbol_hook
4715 #define elf_backend_link_output_symbol_hook \
4716 elf_vxworks_link_output_symbol_hook
4717 #undef elf_backend_emit_relocs
4718 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4719 #undef elf_backend_final_write_processing
4720 #define elf_backend_final_write_processing \
4721 elf_vxworks_final_write_processing
4723 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4725 #undef elf_backend_want_plt_sym
4726 #define elf_backend_want_plt_sym 1
4729 #define elf32_bed elf32_i386_vxworks_bed
4731 #include "elf32-target.h"