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, 2010, 2011
4 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
28 #include "elf-vxworks.h"
29 #include "bfd_stdint.h"
34 /* 386 uses REL relocations instead of RELA. */
39 static reloc_howto_type elf_howto_table[]=
41 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
42 bfd_elf_generic_reloc, "R_386_NONE",
43 TRUE, 0x00000000, 0x00000000, FALSE),
44 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
45 bfd_elf_generic_reloc, "R_386_32",
46 TRUE, 0xffffffff, 0xffffffff, FALSE),
47 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
48 bfd_elf_generic_reloc, "R_386_PC32",
49 TRUE, 0xffffffff, 0xffffffff, TRUE),
50 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
51 bfd_elf_generic_reloc, "R_386_GOT32",
52 TRUE, 0xffffffff, 0xffffffff, FALSE),
53 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
54 bfd_elf_generic_reloc, "R_386_PLT32",
55 TRUE, 0xffffffff, 0xffffffff, TRUE),
56 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
57 bfd_elf_generic_reloc, "R_386_COPY",
58 TRUE, 0xffffffff, 0xffffffff, FALSE),
59 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
61 TRUE, 0xffffffff, 0xffffffff, FALSE),
62 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
64 TRUE, 0xffffffff, 0xffffffff, FALSE),
65 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_386_RELATIVE",
67 TRUE, 0xffffffff, 0xffffffff, FALSE),
68 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_386_GOTOFF",
70 TRUE, 0xffffffff, 0xffffffff, FALSE),
71 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_386_GOTPC",
73 TRUE, 0xffffffff, 0xffffffff, TRUE),
75 /* We have a gap in the reloc numbers here.
76 R_386_standard counts the number up to this point, and
77 R_386_ext_offset is the value to subtract from a reloc type of
78 R_386_16 thru R_386_PC8 to form an index into this table. */
79 #define R_386_standard (R_386_GOTPC + 1)
80 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
82 /* These relocs are a GNU extension. */
83 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
85 TRUE, 0xffffffff, 0xffffffff, FALSE),
86 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_386_TLS_IE",
88 TRUE, 0xffffffff, 0xffffffff, FALSE),
89 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
91 TRUE, 0xffffffff, 0xffffffff, FALSE),
92 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_386_TLS_LE",
94 TRUE, 0xffffffff, 0xffffffff, FALSE),
95 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_386_TLS_GD",
97 TRUE, 0xffffffff, 0xffffffff, FALSE),
98 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_386_TLS_LDM",
100 TRUE, 0xffffffff, 0xffffffff, FALSE),
101 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_386_16",
103 TRUE, 0xffff, 0xffff, FALSE),
104 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_386_PC16",
106 TRUE, 0xffff, 0xffff, TRUE),
107 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_386_8",
109 TRUE, 0xff, 0xff, FALSE),
110 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
111 bfd_elf_generic_reloc, "R_386_PC8",
112 TRUE, 0xff, 0xff, TRUE),
114 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
115 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
116 /* These are common with Solaris TLS implementation. */
117 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
119 TRUE, 0xffffffff, 0xffffffff, FALSE),
120 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
122 TRUE, 0xffffffff, 0xffffffff, FALSE),
123 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
125 TRUE, 0xffffffff, 0xffffffff, FALSE),
126 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
128 TRUE, 0xffffffff, 0xffffffff, FALSE),
129 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
131 TRUE, 0xffffffff, 0xffffffff, FALSE),
132 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
134 TRUE, 0xffffffff, 0xffffffff, FALSE),
136 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
138 TRUE, 0xffffffff, 0xffffffff, FALSE),
139 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
140 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
142 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_386_TLS_DESC",
144 TRUE, 0xffffffff, 0xffffffff, FALSE),
145 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_386_IRELATIVE",
147 TRUE, 0xffffffff, 0xffffffff, FALSE),
150 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
151 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
153 /* GNU extension to record C++ vtable hierarchy. */
154 HOWTO (R_386_GNU_VTINHERIT, /* type */
156 2, /* size (0 = byte, 1 = short, 2 = long) */
158 FALSE, /* pc_relative */
160 complain_overflow_dont, /* complain_on_overflow */
161 NULL, /* special_function */
162 "R_386_GNU_VTINHERIT", /* name */
163 FALSE, /* partial_inplace */
166 FALSE), /* pcrel_offset */
168 /* GNU extension to record C++ vtable member usage. */
169 HOWTO (R_386_GNU_VTENTRY, /* type */
171 2, /* size (0 = byte, 1 = short, 2 = long) */
173 FALSE, /* pc_relative */
175 complain_overflow_dont, /* complain_on_overflow */
176 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
177 "R_386_GNU_VTENTRY", /* name */
178 FALSE, /* partial_inplace */
181 FALSE) /* pcrel_offset */
183 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
187 #ifdef DEBUG_GEN_RELOC
189 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
194 static reloc_howto_type *
195 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
196 bfd_reloc_code_real_type code)
201 TRACE ("BFD_RELOC_NONE");
202 return &elf_howto_table[R_386_NONE];
205 TRACE ("BFD_RELOC_32");
206 return &elf_howto_table[R_386_32];
209 TRACE ("BFD_RELOC_CTOR");
210 return &elf_howto_table[R_386_32];
212 case BFD_RELOC_32_PCREL:
213 TRACE ("BFD_RELOC_PC32");
214 return &elf_howto_table[R_386_PC32];
216 case BFD_RELOC_386_GOT32:
217 TRACE ("BFD_RELOC_386_GOT32");
218 return &elf_howto_table[R_386_GOT32];
220 case BFD_RELOC_386_PLT32:
221 TRACE ("BFD_RELOC_386_PLT32");
222 return &elf_howto_table[R_386_PLT32];
224 case BFD_RELOC_386_COPY:
225 TRACE ("BFD_RELOC_386_COPY");
226 return &elf_howto_table[R_386_COPY];
228 case BFD_RELOC_386_GLOB_DAT:
229 TRACE ("BFD_RELOC_386_GLOB_DAT");
230 return &elf_howto_table[R_386_GLOB_DAT];
232 case BFD_RELOC_386_JUMP_SLOT:
233 TRACE ("BFD_RELOC_386_JUMP_SLOT");
234 return &elf_howto_table[R_386_JUMP_SLOT];
236 case BFD_RELOC_386_RELATIVE:
237 TRACE ("BFD_RELOC_386_RELATIVE");
238 return &elf_howto_table[R_386_RELATIVE];
240 case BFD_RELOC_386_GOTOFF:
241 TRACE ("BFD_RELOC_386_GOTOFF");
242 return &elf_howto_table[R_386_GOTOFF];
244 case BFD_RELOC_386_GOTPC:
245 TRACE ("BFD_RELOC_386_GOTPC");
246 return &elf_howto_table[R_386_GOTPC];
248 /* These relocs are a GNU extension. */
249 case BFD_RELOC_386_TLS_TPOFF:
250 TRACE ("BFD_RELOC_386_TLS_TPOFF");
251 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
253 case BFD_RELOC_386_TLS_IE:
254 TRACE ("BFD_RELOC_386_TLS_IE");
255 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
257 case BFD_RELOC_386_TLS_GOTIE:
258 TRACE ("BFD_RELOC_386_TLS_GOTIE");
259 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
261 case BFD_RELOC_386_TLS_LE:
262 TRACE ("BFD_RELOC_386_TLS_LE");
263 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
265 case BFD_RELOC_386_TLS_GD:
266 TRACE ("BFD_RELOC_386_TLS_GD");
267 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
269 case BFD_RELOC_386_TLS_LDM:
270 TRACE ("BFD_RELOC_386_TLS_LDM");
271 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
274 TRACE ("BFD_RELOC_16");
275 return &elf_howto_table[R_386_16 - R_386_ext_offset];
277 case BFD_RELOC_16_PCREL:
278 TRACE ("BFD_RELOC_16_PCREL");
279 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
282 TRACE ("BFD_RELOC_8");
283 return &elf_howto_table[R_386_8 - R_386_ext_offset];
285 case BFD_RELOC_8_PCREL:
286 TRACE ("BFD_RELOC_8_PCREL");
287 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
289 /* Common with Sun TLS implementation. */
290 case BFD_RELOC_386_TLS_LDO_32:
291 TRACE ("BFD_RELOC_386_TLS_LDO_32");
292 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
294 case BFD_RELOC_386_TLS_IE_32:
295 TRACE ("BFD_RELOC_386_TLS_IE_32");
296 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
298 case BFD_RELOC_386_TLS_LE_32:
299 TRACE ("BFD_RELOC_386_TLS_LE_32");
300 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
302 case BFD_RELOC_386_TLS_DTPMOD32:
303 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
304 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
306 case BFD_RELOC_386_TLS_DTPOFF32:
307 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
308 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
310 case BFD_RELOC_386_TLS_TPOFF32:
311 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
312 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
314 case BFD_RELOC_386_TLS_GOTDESC:
315 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
316 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
318 case BFD_RELOC_386_TLS_DESC_CALL:
319 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
320 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
322 case BFD_RELOC_386_TLS_DESC:
323 TRACE ("BFD_RELOC_386_TLS_DESC");
324 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
326 case BFD_RELOC_386_IRELATIVE:
327 TRACE ("BFD_RELOC_386_IRELATIVE");
328 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
330 case BFD_RELOC_VTABLE_INHERIT:
331 TRACE ("BFD_RELOC_VTABLE_INHERIT");
332 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
334 case BFD_RELOC_VTABLE_ENTRY:
335 TRACE ("BFD_RELOC_VTABLE_ENTRY");
336 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
346 static reloc_howto_type *
347 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
352 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
353 if (elf_howto_table[i].name != NULL
354 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
355 return &elf_howto_table[i];
360 static reloc_howto_type *
361 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
365 if ((indx = r_type) >= R_386_standard
366 && ((indx = r_type - R_386_ext_offset) - R_386_standard
367 >= R_386_ext - R_386_standard)
368 && ((indx = r_type - R_386_tls_offset) - R_386_ext
369 >= R_386_irelative - R_386_ext)
370 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
371 >= R_386_vt - R_386_irelative))
373 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
377 BFD_ASSERT (elf_howto_table [indx].type == r_type);
378 return &elf_howto_table[indx];
382 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
384 Elf_Internal_Rela *dst)
386 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
387 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
390 /* Return whether a symbol name implies a local label. The UnixWare
391 2.1 cc generates temporary symbols that start with .X, so we
392 recognize them here. FIXME: do other SVR4 compilers also use .X?.
393 If so, we should move the .X recognition into
394 _bfd_elf_is_local_label_name. */
397 elf_i386_is_local_label_name (bfd *abfd, const char *name)
399 if (name[0] == '.' && name[1] == 'X')
402 return _bfd_elf_is_local_label_name (abfd, name);
405 /* Support for core dump NOTE sections. */
408 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
413 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
415 int pr_version = bfd_get_32 (abfd, note->descdata);
421 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
424 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
428 size = bfd_get_32 (abfd, note->descdata + 8);
432 switch (note->descsz)
437 case 144: /* Linux/i386 */
439 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
442 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
452 /* Make a ".reg/999" section. */
453 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
454 size, note->descpos + offset);
458 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
460 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
462 int pr_version = bfd_get_32 (abfd, note->descdata);
467 elf_tdata (abfd)->core_program
468 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
469 elf_tdata (abfd)->core_command
470 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
474 switch (note->descsz)
479 case 124: /* Linux/i386 elf_prpsinfo. */
480 elf_tdata (abfd)->core_pid
481 = bfd_get_32 (abfd, note->descdata + 12);
482 elf_tdata (abfd)->core_program
483 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
484 elf_tdata (abfd)->core_command
485 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
489 /* Note that for some reason, a spurious space is tacked
490 onto the end of the args in some (at least one anyway)
491 implementations, so strip it off if it exists. */
493 char *command = elf_tdata (abfd)->core_command;
494 int n = strlen (command);
496 if (0 < n && command[n - 1] == ' ')
497 command[n - 1] = '\0';
503 /* Functions for the i386 ELF linker.
505 In order to gain some understanding of code in this file without
506 knowing all the intricate details of the linker, note the
509 Functions named elf_i386_* are called by external routines, other
510 functions are only called locally. elf_i386_* functions appear
511 in this file more or less in the order in which they are called
512 from external routines. eg. elf_i386_check_relocs is called
513 early in the link process, elf_i386_finish_dynamic_sections is
514 one of the last functions. */
517 /* The name of the dynamic interpreter. This is put in the .interp
520 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
522 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
523 copying dynamic variables from a shared lib into an app's dynbss
524 section, and instead use a dynamic relocation to point into the
526 #define ELIMINATE_COPY_RELOCS 1
528 /* The size in bytes of an entry in the procedure linkage table. */
530 #define PLT_ENTRY_SIZE 16
532 /* The first entry in an absolute procedure linkage table looks like
533 this. See the SVR4 ABI i386 supplement to see how this works.
534 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
536 static const bfd_byte elf_i386_plt0_entry[12] =
538 0xff, 0x35, /* pushl contents of address */
539 0, 0, 0, 0, /* replaced with address of .got + 4. */
540 0xff, 0x25, /* jmp indirect */
541 0, 0, 0, 0 /* replaced with address of .got + 8. */
544 /* Subsequent entries in an absolute procedure linkage table look like
547 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
549 0xff, 0x25, /* jmp indirect */
550 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
551 0x68, /* pushl immediate */
552 0, 0, 0, 0, /* replaced with offset into relocation table. */
553 0xe9, /* jmp relative */
554 0, 0, 0, 0 /* replaced with offset to start of .plt. */
557 /* The first entry in a PIC procedure linkage table look like this.
558 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
560 static const bfd_byte elf_i386_pic_plt0_entry[12] =
562 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
563 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
566 /* Subsequent entries in a PIC procedure linkage table look like this. */
568 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
570 0xff, 0xa3, /* jmp *offset(%ebx) */
571 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
572 0x68, /* pushl immediate */
573 0, 0, 0, 0, /* replaced with offset into relocation table. */
574 0xe9, /* jmp relative */
575 0, 0, 0, 0 /* replaced with offset to start of .plt. */
578 /* .eh_frame covering the .plt section. */
580 static const bfd_byte elf_i386_eh_frame_plt[] =
582 #define PLT_CIE_LENGTH 20
583 #define PLT_FDE_LENGTH 36
584 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
585 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
586 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
587 0, 0, 0, 0, /* CIE ID */
589 'z', 'R', 0, /* Augmentation string */
590 1, /* Code alignment factor */
591 0x7c, /* Data alignment factor */
592 8, /* Return address column */
593 1, /* Augmentation size */
594 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
595 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
596 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
597 DW_CFA_nop, DW_CFA_nop,
599 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
600 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
601 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
602 0, 0, 0, 0, /* .plt size goes here */
603 0, /* Augmentation size */
604 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
605 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
606 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
607 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
608 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
609 11, /* Block length */
610 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
611 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
612 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
613 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
614 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
617 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
618 for the PLTResolve stub and then for each PLT entry. */
619 #define PLTRESOLVE_RELOCS_SHLIB 0
620 #define PLTRESOLVE_RELOCS 2
621 #define PLT_NON_JUMP_SLOT_RELOCS 2
623 /* i386 ELF linker hash entry. */
625 struct elf_i386_link_hash_entry
627 struct elf_link_hash_entry elf;
629 /* Track dynamic relocs copied for this symbol. */
630 struct elf_dyn_relocs *dyn_relocs;
632 #define GOT_UNKNOWN 0
636 #define GOT_TLS_IE_POS 5
637 #define GOT_TLS_IE_NEG 6
638 #define GOT_TLS_IE_BOTH 7
639 #define GOT_TLS_GDESC 8
640 #define GOT_TLS_GD_BOTH_P(type) \
641 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
642 #define GOT_TLS_GD_P(type) \
643 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
644 #define GOT_TLS_GDESC_P(type) \
645 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
646 #define GOT_TLS_GD_ANY_P(type) \
647 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
648 unsigned char tls_type;
650 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
651 starting at the end of the jump table. */
655 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
657 struct elf_i386_obj_tdata
659 struct elf_obj_tdata root;
661 /* tls_type for each local got entry. */
662 char *local_got_tls_type;
664 /* GOTPLT entries for TLS descriptors. */
665 bfd_vma *local_tlsdesc_gotent;
668 #define elf_i386_tdata(abfd) \
669 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
671 #define elf_i386_local_got_tls_type(abfd) \
672 (elf_i386_tdata (abfd)->local_got_tls_type)
674 #define elf_i386_local_tlsdesc_gotent(abfd) \
675 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
677 #define is_i386_elf(bfd) \
678 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
679 && elf_tdata (bfd) != NULL \
680 && elf_object_id (bfd) == I386_ELF_DATA)
683 elf_i386_mkobject (bfd *abfd)
685 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
689 /* i386 ELF linker hash table. */
691 struct elf_i386_link_hash_table
693 struct elf_link_hash_table elf;
695 /* Short-cuts to get to dynamic linker sections. */
698 asection *plt_eh_frame;
702 bfd_signed_vma refcount;
706 /* The amount of space used by the reserved portion of the sgotplt
707 section, plus whatever space is used by the jump slots. */
708 bfd_vma sgotplt_jump_table_size;
710 /* Small local sym cache. */
711 struct sym_cache sym_cache;
713 /* _TLS_MODULE_BASE_ symbol. */
714 struct bfd_link_hash_entry *tls_module_base;
716 /* Used by local STT_GNU_IFUNC symbols. */
717 htab_t loc_hash_table;
718 void * loc_hash_memory;
720 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
723 /* True if the target system is VxWorks. */
726 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
727 bfd_vma next_tls_desc_index;
729 /* Value used to fill the last word of the first plt entry. */
730 bfd_byte plt0_pad_byte;
733 /* Get the i386 ELF linker hash table from a link_info structure. */
735 #define elf_i386_hash_table(p) \
736 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
737 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
739 #define elf_i386_compute_jump_table_size(htab) \
740 ((htab)->next_tls_desc_index * 4)
742 /* Create an entry in an i386 ELF linker hash table. */
744 static struct bfd_hash_entry *
745 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
746 struct bfd_hash_table *table,
749 /* Allocate the structure if it has not already been allocated by a
753 entry = (struct bfd_hash_entry *)
754 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
759 /* Call the allocation method of the superclass. */
760 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
763 struct elf_i386_link_hash_entry *eh;
765 eh = (struct elf_i386_link_hash_entry *) entry;
766 eh->dyn_relocs = NULL;
767 eh->tls_type = GOT_UNKNOWN;
768 eh->tlsdesc_got = (bfd_vma) -1;
774 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
775 for local symbol so that we can handle local STT_GNU_IFUNC symbols
776 as global symbol. We reuse indx and dynstr_index for local symbol
777 hash since they aren't used by global symbols in this backend. */
780 elf_i386_local_htab_hash (const void *ptr)
782 struct elf_link_hash_entry *h
783 = (struct elf_link_hash_entry *) ptr;
784 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
787 /* Compare local hash entries. */
790 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
792 struct elf_link_hash_entry *h1
793 = (struct elf_link_hash_entry *) ptr1;
794 struct elf_link_hash_entry *h2
795 = (struct elf_link_hash_entry *) ptr2;
797 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
800 /* Find and/or create a hash entry for local symbol. */
802 static struct elf_link_hash_entry *
803 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
804 bfd *abfd, const Elf_Internal_Rela *rel,
807 struct elf_i386_link_hash_entry e, *ret;
808 asection *sec = abfd->sections;
809 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
810 ELF32_R_SYM (rel->r_info));
813 e.elf.indx = sec->id;
814 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
815 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
816 create ? INSERT : NO_INSERT);
823 ret = (struct elf_i386_link_hash_entry *) *slot;
827 ret = (struct elf_i386_link_hash_entry *)
828 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
829 sizeof (struct elf_i386_link_hash_entry));
832 memset (ret, 0, sizeof (*ret));
833 ret->elf.indx = sec->id;
834 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
835 ret->elf.dynindx = -1;
841 /* Create an i386 ELF linker hash table. */
843 static struct bfd_link_hash_table *
844 elf_i386_link_hash_table_create (bfd *abfd)
846 struct elf_i386_link_hash_table *ret;
847 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
849 ret = (struct elf_i386_link_hash_table *) bfd_malloc (amt);
853 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
854 elf_i386_link_hash_newfunc,
855 sizeof (struct elf_i386_link_hash_entry),
864 ret->plt_eh_frame = NULL;
865 ret->tls_ldm_got.refcount = 0;
866 ret->next_tls_desc_index = 0;
867 ret->sgotplt_jump_table_size = 0;
868 ret->sym_cache.abfd = NULL;
870 ret->srelplt2 = NULL;
871 ret->plt0_pad_byte = 0;
872 ret->tls_module_base = NULL;
874 ret->loc_hash_table = htab_try_create (1024,
875 elf_i386_local_htab_hash,
876 elf_i386_local_htab_eq,
878 ret->loc_hash_memory = objalloc_create ();
879 if (!ret->loc_hash_table || !ret->loc_hash_memory)
885 return &ret->elf.root;
888 /* Destroy an i386 ELF linker hash table. */
891 elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash)
893 struct elf_i386_link_hash_table *htab
894 = (struct elf_i386_link_hash_table *) hash;
896 if (htab->loc_hash_table)
897 htab_delete (htab->loc_hash_table);
898 if (htab->loc_hash_memory)
899 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
900 _bfd_generic_link_hash_table_free (hash);
903 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
904 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
908 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
910 struct elf_i386_link_hash_table *htab;
912 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
915 htab = elf_i386_hash_table (info);
919 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
921 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
924 || (!info->shared && !htab->srelbss))
928 && !elf_vxworks_create_dynamic_sections (dynobj, info,
932 if (!info->no_ld_generated_unwind_info
933 && bfd_get_section_by_name (dynobj, ".eh_frame") == NULL
934 && htab->elf.splt != NULL)
936 flagword flags = get_elf_backend_data (dynobj)->dynamic_sec_flags;
938 = bfd_make_section_with_flags (dynobj, ".eh_frame",
939 flags | SEC_READONLY);
940 if (htab->plt_eh_frame == NULL
941 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
944 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
945 htab->plt_eh_frame->contents
946 = bfd_alloc (dynobj, htab->plt_eh_frame->size);
947 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
948 sizeof (elf_i386_eh_frame_plt));
954 /* Copy the extra info we tack onto an elf_link_hash_entry. */
957 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
958 struct elf_link_hash_entry *dir,
959 struct elf_link_hash_entry *ind)
961 struct elf_i386_link_hash_entry *edir, *eind;
963 edir = (struct elf_i386_link_hash_entry *) dir;
964 eind = (struct elf_i386_link_hash_entry *) ind;
966 if (eind->dyn_relocs != NULL)
968 if (edir->dyn_relocs != NULL)
970 struct elf_dyn_relocs **pp;
971 struct elf_dyn_relocs *p;
973 /* Add reloc counts against the indirect sym to the direct sym
974 list. Merge any entries against the same section. */
975 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
977 struct elf_dyn_relocs *q;
979 for (q = edir->dyn_relocs; q != NULL; q = q->next)
980 if (q->sec == p->sec)
982 q->pc_count += p->pc_count;
983 q->count += p->count;
990 *pp = edir->dyn_relocs;
993 edir->dyn_relocs = eind->dyn_relocs;
994 eind->dyn_relocs = NULL;
997 if (ind->root.type == bfd_link_hash_indirect
998 && dir->got.refcount <= 0)
1000 edir->tls_type = eind->tls_type;
1001 eind->tls_type = GOT_UNKNOWN;
1004 if (ELIMINATE_COPY_RELOCS
1005 && ind->root.type != bfd_link_hash_indirect
1006 && dir->dynamic_adjusted)
1008 /* If called to transfer flags for a weakdef during processing
1009 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1010 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1011 dir->ref_dynamic |= ind->ref_dynamic;
1012 dir->ref_regular |= ind->ref_regular;
1013 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1014 dir->needs_plt |= ind->needs_plt;
1015 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1018 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1028 /* Return TRUE if the TLS access code sequence support transition
1032 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1034 Elf_Internal_Shdr *symtab_hdr,
1035 struct elf_link_hash_entry **sym_hashes,
1036 unsigned int r_type,
1037 const Elf_Internal_Rela *rel,
1038 const Elf_Internal_Rela *relend)
1040 unsigned int val, type;
1041 unsigned long r_symndx;
1042 struct elf_link_hash_entry *h;
1045 /* Get the section contents. */
1046 if (contents == NULL)
1048 if (elf_section_data (sec)->this_hdr.contents != NULL)
1049 contents = elf_section_data (sec)->this_hdr.contents;
1052 /* FIXME: How to better handle error condition? */
1053 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1056 /* Cache the section contents for elf_link_input_bfd. */
1057 elf_section_data (sec)->this_hdr.contents = contents;
1061 offset = rel->r_offset;
1066 if (offset < 2 || (rel + 1) >= relend)
1069 type = bfd_get_8 (abfd, contents + offset - 2);
1070 if (r_type == R_386_TLS_GD)
1072 /* Check transition from GD access model. Only
1073 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1074 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1075 can transit to different access model. */
1076 if ((offset + 10) > sec->size ||
1077 (type != 0x8d && type != 0x04))
1080 val = bfd_get_8 (abfd, contents + offset - 1);
1083 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1087 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1090 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1095 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1096 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1099 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1105 /* Check transition from LD access model. Only
1106 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1107 can transit to different access model. */
1108 if (type != 0x8d || (offset + 9) > sec->size)
1111 val = bfd_get_8 (abfd, contents + offset - 1);
1112 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1116 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1119 r_symndx = ELF32_R_SYM (rel[1].r_info);
1120 if (r_symndx < symtab_hdr->sh_info)
1123 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1124 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1125 may be versioned. */
1127 && h->root.root.string != NULL
1128 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1129 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1130 && (strncmp (h->root.root.string, "___tls_get_addr",
1134 /* Check transition from IE access model:
1135 movl foo@indntpoff(%rip), %eax
1136 movl foo@indntpoff(%rip), %reg
1137 addl foo@indntpoff(%rip), %reg
1140 if (offset < 1 || (offset + 4) > sec->size)
1143 /* Check "movl foo@tpoff(%rip), %eax" first. */
1144 val = bfd_get_8 (abfd, contents + offset - 1);
1151 /* Check movl|addl foo@tpoff(%rip), %reg. */
1152 type = bfd_get_8 (abfd, contents + offset - 2);
1153 return ((type == 0x8b || type == 0x03)
1154 && (val & 0xc7) == 0x05);
1156 case R_386_TLS_GOTIE:
1157 case R_386_TLS_IE_32:
1158 /* Check transition from {IE_32,GOTIE} access model:
1159 subl foo@{tpoff,gontoff}(%reg1), %reg2
1160 movl foo@{tpoff,gontoff}(%reg1), %reg2
1161 addl foo@{tpoff,gontoff}(%reg1), %reg2
1164 if (offset < 2 || (offset + 4) > sec->size)
1167 val = bfd_get_8 (abfd, contents + offset - 1);
1168 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1171 type = bfd_get_8 (abfd, contents + offset - 2);
1172 return type == 0x8b || type == 0x2b || type == 0x03;
1174 case R_386_TLS_GOTDESC:
1175 /* Check transition from GDesc access model:
1176 leal x@tlsdesc(%ebx), %eax
1178 Make sure it's a leal adding ebx to a 32-bit offset
1179 into any register, although it's probably almost always
1182 if (offset < 2 || (offset + 4) > sec->size)
1185 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1188 val = bfd_get_8 (abfd, contents + offset - 1);
1189 return (val & 0xc7) == 0x83;
1191 case R_386_TLS_DESC_CALL:
1192 /* Check transition from GDesc access model:
1193 call *x@tlsdesc(%rax)
1195 if (offset + 2 <= sec->size)
1197 /* Make sure that it's a call *x@tlsdesc(%rax). */
1198 static i386_opcode16 call = { { 0xff, 0x10 } };
1199 return bfd_get_16 (abfd, contents + offset) == call.i;
1209 /* Return TRUE if the TLS access transition is OK or no transition
1210 will be performed. Update R_TYPE if there is a transition. */
1213 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1214 asection *sec, bfd_byte *contents,
1215 Elf_Internal_Shdr *symtab_hdr,
1216 struct elf_link_hash_entry **sym_hashes,
1217 unsigned int *r_type, int tls_type,
1218 const Elf_Internal_Rela *rel,
1219 const Elf_Internal_Rela *relend,
1220 struct elf_link_hash_entry *h,
1221 unsigned long r_symndx)
1223 unsigned int from_type = *r_type;
1224 unsigned int to_type = from_type;
1225 bfd_boolean check = TRUE;
1227 /* Skip TLS transition for functions. */
1229 && (h->type == STT_FUNC
1230 || h->type == STT_GNU_IFUNC))
1236 case R_386_TLS_GOTDESC:
1237 case R_386_TLS_DESC_CALL:
1238 case R_386_TLS_IE_32:
1240 case R_386_TLS_GOTIE:
1241 if (info->executable)
1244 to_type = R_386_TLS_LE_32;
1245 else if (from_type != R_386_TLS_IE
1246 && from_type != R_386_TLS_GOTIE)
1247 to_type = R_386_TLS_IE_32;
1250 /* When we are called from elf_i386_relocate_section, CONTENTS
1251 isn't NULL and there may be additional transitions based on
1253 if (contents != NULL)
1255 unsigned int new_to_type = to_type;
1257 if (info->executable
1260 && (tls_type & GOT_TLS_IE))
1261 new_to_type = R_386_TLS_LE_32;
1263 if (to_type == R_386_TLS_GD
1264 || to_type == R_386_TLS_GOTDESC
1265 || to_type == R_386_TLS_DESC_CALL)
1267 if (tls_type == GOT_TLS_IE_POS)
1268 new_to_type = R_386_TLS_GOTIE;
1269 else if (tls_type & GOT_TLS_IE)
1270 new_to_type = R_386_TLS_IE_32;
1273 /* We checked the transition before when we were called from
1274 elf_i386_check_relocs. We only want to check the new
1275 transition which hasn't been checked before. */
1276 check = new_to_type != to_type && from_type == to_type;
1277 to_type = new_to_type;
1283 if (info->executable)
1284 to_type = R_386_TLS_LE_32;
1291 /* Return TRUE if there is no transition. */
1292 if (from_type == to_type)
1295 /* Check if the transition can be performed. */
1297 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1298 symtab_hdr, sym_hashes,
1299 from_type, rel, relend))
1301 reloc_howto_type *from, *to;
1304 from = elf_i386_rtype_to_howto (abfd, from_type);
1305 to = elf_i386_rtype_to_howto (abfd, to_type);
1308 name = h->root.root.string;
1311 struct elf_i386_link_hash_table *htab;
1313 htab = elf_i386_hash_table (info);
1318 Elf_Internal_Sym *isym;
1320 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1322 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1326 (*_bfd_error_handler)
1327 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1328 "in section `%A' failed"),
1329 abfd, sec, from->name, to->name, name,
1330 (unsigned long) rel->r_offset);
1331 bfd_set_error (bfd_error_bad_value);
1339 /* Look through the relocs for a section during the first phase, and
1340 calculate needed space in the global offset table, procedure linkage
1341 table, and dynamic reloc sections. */
1344 elf_i386_check_relocs (bfd *abfd,
1345 struct bfd_link_info *info,
1347 const Elf_Internal_Rela *relocs)
1349 struct elf_i386_link_hash_table *htab;
1350 Elf_Internal_Shdr *symtab_hdr;
1351 struct elf_link_hash_entry **sym_hashes;
1352 const Elf_Internal_Rela *rel;
1353 const Elf_Internal_Rela *rel_end;
1356 if (info->relocatable)
1359 BFD_ASSERT (is_i386_elf (abfd));
1361 htab = elf_i386_hash_table (info);
1365 symtab_hdr = &elf_symtab_hdr (abfd);
1366 sym_hashes = elf_sym_hashes (abfd);
1370 rel_end = relocs + sec->reloc_count;
1371 for (rel = relocs; rel < rel_end; rel++)
1373 unsigned int r_type;
1374 unsigned long r_symndx;
1375 struct elf_link_hash_entry *h;
1376 Elf_Internal_Sym *isym;
1379 r_symndx = ELF32_R_SYM (rel->r_info);
1380 r_type = ELF32_R_TYPE (rel->r_info);
1382 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1384 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1390 if (r_symndx < symtab_hdr->sh_info)
1392 /* A local symbol. */
1393 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1398 /* Check relocation against local STT_GNU_IFUNC symbol. */
1399 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1401 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1405 /* Fake a STT_GNU_IFUNC symbol. */
1406 h->type = STT_GNU_IFUNC;
1409 h->forced_local = 1;
1410 h->root.type = bfd_link_hash_defined;
1418 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1419 while (h->root.type == bfd_link_hash_indirect
1420 || h->root.type == bfd_link_hash_warning)
1421 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1426 /* Create the ifunc sections for static executables. If we
1427 never see an indirect function symbol nor we are building
1428 a static executable, those sections will be empty and
1429 won't appear in output. */
1440 if (htab->elf.dynobj == NULL)
1441 htab->elf.dynobj = abfd;
1442 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1447 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1448 it here if it is defined in a non-shared object. */
1449 if (h->type == STT_GNU_IFUNC
1452 /* It is referenced by a non-shared object. */
1456 /* STT_GNU_IFUNC symbol must go through PLT. */
1457 h->plt.refcount += 1;
1459 /* STT_GNU_IFUNC needs dynamic sections. */
1460 if (htab->elf.dynobj == NULL)
1461 htab->elf.dynobj = abfd;
1466 if (h->root.root.string)
1467 name = h->root.root.string;
1469 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1471 (*_bfd_error_handler)
1472 (_("%B: relocation %s against STT_GNU_IFUNC "
1473 "symbol `%s' isn't handled by %s"), abfd,
1474 elf_howto_table[r_type].name,
1475 name, __FUNCTION__);
1476 bfd_set_error (bfd_error_bad_value);
1481 h->pointer_equality_needed = 1;
1484 /* We must copy these reloc types into the
1485 output file. Create a reloc section in
1486 dynobj and make room for this reloc. */
1487 sreloc = _bfd_elf_create_ifunc_dyn_reloc
1488 (abfd, info, sec, sreloc,
1489 &((struct elf_i386_link_hash_entry *) h)->dyn_relocs);
1504 h->got.refcount += 1;
1505 if (htab->elf.sgot == NULL
1506 && !_bfd_elf_create_got_section (htab->elf.dynobj,
1516 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1517 symtab_hdr, sym_hashes,
1518 &r_type, GOT_UNKNOWN,
1519 rel, rel_end, h, r_symndx))
1525 htab->tls_ldm_got.refcount += 1;
1529 /* This symbol requires a procedure linkage table entry. We
1530 actually build the entry in adjust_dynamic_symbol,
1531 because this might be a case of linking PIC code which is
1532 never referenced by a dynamic object, in which case we
1533 don't need to generate a procedure linkage table entry
1536 /* If this is a local symbol, we resolve it directly without
1537 creating a procedure linkage table entry. */
1542 h->plt.refcount += 1;
1545 case R_386_TLS_IE_32:
1547 case R_386_TLS_GOTIE:
1548 if (!info->executable)
1549 info->flags |= DF_STATIC_TLS;
1554 case R_386_TLS_GOTDESC:
1555 case R_386_TLS_DESC_CALL:
1556 /* This symbol requires a global offset table entry. */
1558 int tls_type, old_tls_type;
1563 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1564 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1565 case R_386_TLS_GOTDESC:
1566 case R_386_TLS_DESC_CALL:
1567 tls_type = GOT_TLS_GDESC; break;
1568 case R_386_TLS_IE_32:
1569 if (ELF32_R_TYPE (rel->r_info) == r_type)
1570 tls_type = GOT_TLS_IE_NEG;
1572 /* If this is a GD->IE transition, we may use either of
1573 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1574 tls_type = GOT_TLS_IE;
1577 case R_386_TLS_GOTIE:
1578 tls_type = GOT_TLS_IE_POS; break;
1583 h->got.refcount += 1;
1584 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1588 bfd_signed_vma *local_got_refcounts;
1590 /* This is a global offset table entry for a local symbol. */
1591 local_got_refcounts = elf_local_got_refcounts (abfd);
1592 if (local_got_refcounts == NULL)
1596 size = symtab_hdr->sh_info;
1597 size *= (sizeof (bfd_signed_vma)
1598 + sizeof (bfd_vma) + sizeof(char));
1599 local_got_refcounts = (bfd_signed_vma *)
1600 bfd_zalloc (abfd, size);
1601 if (local_got_refcounts == NULL)
1603 elf_local_got_refcounts (abfd) = local_got_refcounts;
1604 elf_i386_local_tlsdesc_gotent (abfd)
1605 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1606 elf_i386_local_got_tls_type (abfd)
1607 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1609 local_got_refcounts[r_symndx] += 1;
1610 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1613 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1614 tls_type |= old_tls_type;
1615 /* If a TLS symbol is accessed using IE at least once,
1616 there is no point to use dynamic model for it. */
1617 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1618 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1619 || (tls_type & GOT_TLS_IE) == 0))
1621 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1622 tls_type = old_tls_type;
1623 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1624 && GOT_TLS_GD_ANY_P (tls_type))
1625 tls_type |= old_tls_type;
1629 name = h->root.root.string;
1631 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1633 (*_bfd_error_handler)
1634 (_("%B: `%s' accessed both as normal and "
1635 "thread local symbol"),
1641 if (old_tls_type != tls_type)
1644 elf_i386_hash_entry (h)->tls_type = tls_type;
1646 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1654 if (htab->elf.sgot == NULL)
1656 if (htab->elf.dynobj == NULL)
1657 htab->elf.dynobj = abfd;
1658 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1661 if (r_type != R_386_TLS_IE)
1665 case R_386_TLS_LE_32:
1667 if (info->executable)
1669 info->flags |= DF_STATIC_TLS;
1674 if (h != NULL && info->executable)
1676 /* If this reloc is in a read-only section, we might
1677 need a copy reloc. We can't check reliably at this
1678 stage whether the section is read-only, as input
1679 sections have not yet been mapped to output sections.
1680 Tentatively set the flag for now, and correct in
1681 adjust_dynamic_symbol. */
1684 /* We may need a .plt entry if the function this reloc
1685 refers to is in a shared lib. */
1686 h->plt.refcount += 1;
1687 if (r_type != R_386_PC32)
1688 h->pointer_equality_needed = 1;
1691 /* If we are creating a shared library, and this is a reloc
1692 against a global symbol, or a non PC relative reloc
1693 against a local symbol, then we need to copy the reloc
1694 into the shared library. However, if we are linking with
1695 -Bsymbolic, we do not need to copy a reloc against a
1696 global symbol which is defined in an object we are
1697 including in the link (i.e., DEF_REGULAR is set). At
1698 this point we have not seen all the input files, so it is
1699 possible that DEF_REGULAR is not set now but will be set
1700 later (it is never cleared). In case of a weak definition,
1701 DEF_REGULAR may be cleared later by a strong definition in
1702 a shared library. We account for that possibility below by
1703 storing information in the relocs_copied field of the hash
1704 table entry. A similar situation occurs when creating
1705 shared libraries and symbol visibility changes render the
1708 If on the other hand, we are creating an executable, we
1709 may need to keep relocations for symbols satisfied by a
1710 dynamic library if we manage to avoid copy relocs for the
1713 && (sec->flags & SEC_ALLOC) != 0
1714 && (r_type != R_386_PC32
1716 && (! SYMBOLIC_BIND (info, h)
1717 || h->root.type == bfd_link_hash_defweak
1718 || !h->def_regular))))
1719 || (ELIMINATE_COPY_RELOCS
1721 && (sec->flags & SEC_ALLOC) != 0
1723 && (h->root.type == bfd_link_hash_defweak
1724 || !h->def_regular)))
1726 struct elf_dyn_relocs *p;
1727 struct elf_dyn_relocs **head;
1729 /* We must copy these reloc types into the output file.
1730 Create a reloc section in dynobj and make room for
1734 if (htab->elf.dynobj == NULL)
1735 htab->elf.dynobj = abfd;
1737 sreloc = _bfd_elf_make_dynamic_reloc_section
1738 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1744 /* If this is a global symbol, we count the number of
1745 relocations we need for this symbol. */
1748 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1752 /* Track dynamic relocs needed for local syms too.
1753 We really need local syms available to do this
1758 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1763 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1767 vpp = &elf_section_data (s)->local_dynrel;
1768 head = (struct elf_dyn_relocs **)vpp;
1772 if (p == NULL || p->sec != sec)
1774 bfd_size_type amt = sizeof *p;
1775 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1787 if (r_type == R_386_PC32)
1792 /* This relocation describes the C++ object vtable hierarchy.
1793 Reconstruct it for later use during GC. */
1794 case R_386_GNU_VTINHERIT:
1795 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1799 /* This relocation describes which C++ vtable entries are actually
1800 used. Record for later use during GC. */
1801 case R_386_GNU_VTENTRY:
1802 BFD_ASSERT (h != NULL);
1804 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1816 /* Return the section that should be marked against GC for a given
1820 elf_i386_gc_mark_hook (asection *sec,
1821 struct bfd_link_info *info,
1822 Elf_Internal_Rela *rel,
1823 struct elf_link_hash_entry *h,
1824 Elf_Internal_Sym *sym)
1827 switch (ELF32_R_TYPE (rel->r_info))
1829 case R_386_GNU_VTINHERIT:
1830 case R_386_GNU_VTENTRY:
1834 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1837 /* Update the got entry reference counts for the section being removed. */
1840 elf_i386_gc_sweep_hook (bfd *abfd,
1841 struct bfd_link_info *info,
1843 const Elf_Internal_Rela *relocs)
1845 struct elf_i386_link_hash_table *htab;
1846 Elf_Internal_Shdr *symtab_hdr;
1847 struct elf_link_hash_entry **sym_hashes;
1848 bfd_signed_vma *local_got_refcounts;
1849 const Elf_Internal_Rela *rel, *relend;
1851 if (info->relocatable)
1854 htab = elf_i386_hash_table (info);
1858 elf_section_data (sec)->local_dynrel = NULL;
1860 symtab_hdr = &elf_symtab_hdr (abfd);
1861 sym_hashes = elf_sym_hashes (abfd);
1862 local_got_refcounts = elf_local_got_refcounts (abfd);
1864 relend = relocs + sec->reloc_count;
1865 for (rel = relocs; rel < relend; rel++)
1867 unsigned long r_symndx;
1868 unsigned int r_type;
1869 struct elf_link_hash_entry *h = NULL;
1871 r_symndx = ELF32_R_SYM (rel->r_info);
1872 if (r_symndx >= symtab_hdr->sh_info)
1874 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1875 while (h->root.type == bfd_link_hash_indirect
1876 || h->root.type == bfd_link_hash_warning)
1877 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1881 /* A local symbol. */
1882 Elf_Internal_Sym *isym;
1884 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1887 /* Check relocation against local STT_GNU_IFUNC symbol. */
1889 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1891 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
1899 struct elf_i386_link_hash_entry *eh;
1900 struct elf_dyn_relocs **pp;
1901 struct elf_dyn_relocs *p;
1903 eh = (struct elf_i386_link_hash_entry *) h;
1904 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1907 /* Everything must go for SEC. */
1913 r_type = ELF32_R_TYPE (rel->r_info);
1914 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1915 symtab_hdr, sym_hashes,
1916 &r_type, GOT_UNKNOWN,
1917 rel, relend, h, r_symndx))
1923 if (htab->tls_ldm_got.refcount > 0)
1924 htab->tls_ldm_got.refcount -= 1;
1928 case R_386_TLS_GOTDESC:
1929 case R_386_TLS_DESC_CALL:
1930 case R_386_TLS_IE_32:
1932 case R_386_TLS_GOTIE:
1936 if (h->got.refcount > 0)
1937 h->got.refcount -= 1;
1938 if (h->type == STT_GNU_IFUNC)
1940 if (h->plt.refcount > 0)
1941 h->plt.refcount -= 1;
1944 else if (local_got_refcounts != NULL)
1946 if (local_got_refcounts[r_symndx] > 0)
1947 local_got_refcounts[r_symndx] -= 1;
1954 && (h == NULL || h->type != STT_GNU_IFUNC))
1961 if (h->plt.refcount > 0)
1962 h->plt.refcount -= 1;
1967 if (h != NULL && h->type == STT_GNU_IFUNC)
1969 if (h->got.refcount > 0)
1970 h->got.refcount -= 1;
1971 if (h->plt.refcount > 0)
1972 h->plt.refcount -= 1;
1984 /* Adjust a symbol defined by a dynamic object and referenced by a
1985 regular object. The current definition is in some section of the
1986 dynamic object, but we're not including those sections. We have to
1987 change the definition to something the rest of the link can
1991 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1992 struct elf_link_hash_entry *h)
1994 struct elf_i386_link_hash_table *htab;
1997 /* STT_GNU_IFUNC symbol must go through PLT. */
1998 if (h->type == STT_GNU_IFUNC)
2000 if (h->plt.refcount <= 0)
2002 h->plt.offset = (bfd_vma) -1;
2008 /* If this is a function, put it in the procedure linkage table. We
2009 will fill in the contents of the procedure linkage table later,
2010 when we know the address of the .got section. */
2011 if (h->type == STT_FUNC
2014 if (h->plt.refcount <= 0
2015 || SYMBOL_CALLS_LOCAL (info, h)
2016 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2017 && h->root.type == bfd_link_hash_undefweak))
2019 /* This case can occur if we saw a PLT32 reloc in an input
2020 file, but the symbol was never referred to by a dynamic
2021 object, or if all references were garbage collected. In
2022 such a case, we don't actually need to build a procedure
2023 linkage table, and we can just do a PC32 reloc instead. */
2024 h->plt.offset = (bfd_vma) -1;
2031 /* It's possible that we incorrectly decided a .plt reloc was
2032 needed for an R_386_PC32 reloc to a non-function sym in
2033 check_relocs. We can't decide accurately between function and
2034 non-function syms in check-relocs; Objects loaded later in
2035 the link may change h->type. So fix it now. */
2036 h->plt.offset = (bfd_vma) -1;
2038 /* If this is a weak symbol, and there is a real definition, the
2039 processor independent code will have arranged for us to see the
2040 real definition first, and we can just use the same value. */
2041 if (h->u.weakdef != NULL)
2043 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2044 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2045 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2046 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2047 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2048 h->non_got_ref = h->u.weakdef->non_got_ref;
2052 /* This is a reference to a symbol defined by a dynamic object which
2053 is not a function. */
2055 /* If we are creating a shared library, we must presume that the
2056 only references to the symbol are via the global offset table.
2057 For such cases we need not do anything here; the relocations will
2058 be handled correctly by relocate_section. */
2062 /* If there are no references to this symbol that do not use the
2063 GOT, we don't need to generate a copy reloc. */
2064 if (!h->non_got_ref)
2067 /* If -z nocopyreloc was given, we won't generate them either. */
2068 if (info->nocopyreloc)
2074 htab = elf_i386_hash_table (info);
2078 /* If there aren't any dynamic relocs in read-only sections, then
2079 we can keep the dynamic relocs and avoid the copy reloc. This
2080 doesn't work on VxWorks, where we can not have dynamic relocations
2081 (other than copy and jump slot relocations) in an executable. */
2082 if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
2084 struct elf_i386_link_hash_entry * eh;
2085 struct elf_dyn_relocs *p;
2087 eh = (struct elf_i386_link_hash_entry *) h;
2088 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2090 s = p->sec->output_section;
2091 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2104 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2105 h->root.root.string);
2109 /* We must allocate the symbol in our .dynbss section, which will
2110 become part of the .bss section of the executable. There will be
2111 an entry for this symbol in the .dynsym section. The dynamic
2112 object will contain position independent code, so all references
2113 from the dynamic object to this symbol will go through the global
2114 offset table. The dynamic linker will use the .dynsym entry to
2115 determine the address it must put in the global offset table, so
2116 both the dynamic object and the regular object will refer to the
2117 same memory location for the variable. */
2119 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2120 copy the initial value out of the dynamic object and into the
2121 runtime process image. */
2122 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2124 htab->srelbss->size += sizeof (Elf32_External_Rel);
2130 return _bfd_elf_adjust_dynamic_copy (h, s);
2133 /* Allocate space in .plt, .got and associated reloc sections for
2137 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2139 struct bfd_link_info *info;
2140 struct elf_i386_link_hash_table *htab;
2141 struct elf_i386_link_hash_entry *eh;
2142 struct elf_dyn_relocs *p;
2144 if (h->root.type == bfd_link_hash_indirect)
2147 eh = (struct elf_i386_link_hash_entry *) h;
2149 info = (struct bfd_link_info *) inf;
2150 htab = elf_i386_hash_table (info);
2154 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2155 here if it is defined and referenced in a non-shared object. */
2156 if (h->type == STT_GNU_IFUNC
2158 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2161 else if (htab->elf.dynamic_sections_created
2162 && h->plt.refcount > 0)
2164 /* Make sure this symbol is output as a dynamic symbol.
2165 Undefined weak syms won't yet be marked as dynamic. */
2166 if (h->dynindx == -1
2167 && !h->forced_local)
2169 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2174 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2176 asection *s = htab->elf.splt;
2178 /* If this is the first .plt entry, make room for the special
2181 s->size += PLT_ENTRY_SIZE;
2183 h->plt.offset = s->size;
2185 /* If this symbol is not defined in a regular file, and we are
2186 not generating a shared library, then set the symbol to this
2187 location in the .plt. This is required to make function
2188 pointers compare as equal between the normal executable and
2189 the shared library. */
2193 h->root.u.def.section = s;
2194 h->root.u.def.value = h->plt.offset;
2197 /* Make room for this entry. */
2198 s->size += PLT_ENTRY_SIZE;
2200 /* We also need to make an entry in the .got.plt section, which
2201 will be placed in the .got section by the linker script. */
2202 htab->elf.sgotplt->size += 4;
2204 /* We also need to make an entry in the .rel.plt section. */
2205 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2206 htab->next_tls_desc_index++;
2208 if (htab->is_vxworks && !info->shared)
2210 /* VxWorks has a second set of relocations for each PLT entry
2211 in executables. They go in a separate relocation section,
2212 which is processed by the kernel loader. */
2214 /* There are two relocations for the initial PLT entry: an
2215 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2216 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2218 if (h->plt.offset == PLT_ENTRY_SIZE)
2219 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2221 /* There are two extra relocations for each subsequent PLT entry:
2222 an R_386_32 relocation for the GOT entry, and an R_386_32
2223 relocation for the PLT entry. */
2225 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2230 h->plt.offset = (bfd_vma) -1;
2236 h->plt.offset = (bfd_vma) -1;
2240 eh->tlsdesc_got = (bfd_vma) -1;
2242 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2243 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2244 if (h->got.refcount > 0
2247 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2248 h->got.offset = (bfd_vma) -1;
2249 else if (h->got.refcount > 0)
2253 int tls_type = elf_i386_hash_entry(h)->tls_type;
2255 /* Make sure this symbol is output as a dynamic symbol.
2256 Undefined weak syms won't yet be marked as dynamic. */
2257 if (h->dynindx == -1
2258 && !h->forced_local)
2260 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2265 if (GOT_TLS_GDESC_P (tls_type))
2267 eh->tlsdesc_got = htab->elf.sgotplt->size
2268 - elf_i386_compute_jump_table_size (htab);
2269 htab->elf.sgotplt->size += 8;
2270 h->got.offset = (bfd_vma) -2;
2272 if (! GOT_TLS_GDESC_P (tls_type)
2273 || GOT_TLS_GD_P (tls_type))
2275 h->got.offset = s->size;
2277 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2278 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2281 dyn = htab->elf.dynamic_sections_created;
2282 /* R_386_TLS_IE_32 needs one dynamic relocation,
2283 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2284 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2285 need two), R_386_TLS_GD needs one if local symbol and two if
2287 if (tls_type == GOT_TLS_IE_BOTH)
2288 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2289 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2290 || (tls_type & GOT_TLS_IE))
2291 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2292 else if (GOT_TLS_GD_P (tls_type))
2293 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2294 else if (! GOT_TLS_GDESC_P (tls_type)
2295 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2296 || h->root.type != bfd_link_hash_undefweak)
2298 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2299 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2300 if (GOT_TLS_GDESC_P (tls_type))
2301 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2304 h->got.offset = (bfd_vma) -1;
2306 if (eh->dyn_relocs == NULL)
2309 /* In the shared -Bsymbolic case, discard space allocated for
2310 dynamic pc-relative relocs against symbols which turn out to be
2311 defined in regular objects. For the normal shared case, discard
2312 space for pc-relative relocs that have become local due to symbol
2313 visibility changes. */
2317 /* The only reloc that uses pc_count is R_386_PC32, which will
2318 appear on a call or on something like ".long foo - .". We
2319 want calls to protected symbols to resolve directly to the
2320 function rather than going via the plt. If people want
2321 function pointer comparisons to work as expected then they
2322 should avoid writing assembly like ".long foo - .". */
2323 if (SYMBOL_CALLS_LOCAL (info, h))
2325 struct elf_dyn_relocs **pp;
2327 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2329 p->count -= p->pc_count;
2338 if (htab->is_vxworks)
2340 struct elf_dyn_relocs **pp;
2341 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2343 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2350 /* Also discard relocs on undefined weak syms with non-default
2352 if (eh->dyn_relocs != NULL
2353 && h->root.type == bfd_link_hash_undefweak)
2355 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2356 eh->dyn_relocs = NULL;
2358 /* Make sure undefined weak symbols are output as a dynamic
2360 else if (h->dynindx == -1
2361 && !h->forced_local)
2363 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2368 else if (ELIMINATE_COPY_RELOCS)
2370 /* For the non-shared case, discard space for relocs against
2371 symbols which turn out to need copy relocs or are not
2377 || (htab->elf.dynamic_sections_created
2378 && (h->root.type == bfd_link_hash_undefweak
2379 || h->root.type == bfd_link_hash_undefined))))
2381 /* Make sure this symbol is output as a dynamic symbol.
2382 Undefined weak syms won't yet be marked as dynamic. */
2383 if (h->dynindx == -1
2384 && !h->forced_local)
2386 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2390 /* If that succeeded, we know we'll be keeping all the
2392 if (h->dynindx != -1)
2396 eh->dyn_relocs = NULL;
2401 /* Finally, allocate space. */
2402 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2406 sreloc = elf_section_data (p->sec)->sreloc;
2408 BFD_ASSERT (sreloc != NULL);
2409 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2415 /* Allocate space in .plt, .got and associated reloc sections for
2416 local dynamic relocs. */
2419 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2421 struct elf_link_hash_entry *h
2422 = (struct elf_link_hash_entry *) *slot;
2424 if (h->type != STT_GNU_IFUNC
2428 || h->root.type != bfd_link_hash_defined)
2431 return elf_i386_allocate_dynrelocs (h, inf);
2434 /* Find any dynamic relocs that apply to read-only sections. */
2437 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2439 struct elf_i386_link_hash_entry *eh;
2440 struct elf_dyn_relocs *p;
2442 /* Skip local IFUNC symbols. */
2443 if (h->forced_local && h->type == STT_GNU_IFUNC)
2446 eh = (struct elf_i386_link_hash_entry *) h;
2447 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2449 asection *s = p->sec->output_section;
2451 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2453 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2455 info->flags |= DF_TEXTREL;
2457 if (info->warn_shared_textrel && info->shared)
2458 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2459 p->sec->owner, h->root.root.string,
2462 /* Not an error, just cut short the traversal. */
2469 /* Set the sizes of the dynamic sections. */
2472 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2473 struct bfd_link_info *info)
2475 struct elf_i386_link_hash_table *htab;
2481 htab = elf_i386_hash_table (info);
2484 dynobj = htab->elf.dynobj;
2488 if (htab->elf.dynamic_sections_created)
2490 /* Set the contents of the .interp section to the interpreter. */
2491 if (info->executable)
2493 s = bfd_get_section_by_name (dynobj, ".interp");
2496 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2497 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2501 /* Set up .got offsets for local syms, and space for local dynamic
2503 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2505 bfd_signed_vma *local_got;
2506 bfd_signed_vma *end_local_got;
2507 char *local_tls_type;
2508 bfd_vma *local_tlsdesc_gotent;
2509 bfd_size_type locsymcount;
2510 Elf_Internal_Shdr *symtab_hdr;
2513 if (! is_i386_elf (ibfd))
2516 for (s = ibfd->sections; s != NULL; s = s->next)
2518 struct elf_dyn_relocs *p;
2520 for (p = ((struct elf_dyn_relocs *)
2521 elf_section_data (s)->local_dynrel);
2525 if (!bfd_is_abs_section (p->sec)
2526 && bfd_is_abs_section (p->sec->output_section))
2528 /* Input section has been discarded, either because
2529 it is a copy of a linkonce section or due to
2530 linker script /DISCARD/, so we'll be discarding
2533 else if (htab->is_vxworks
2534 && strcmp (p->sec->output_section->name,
2537 /* Relocations in vxworks .tls_vars sections are
2538 handled specially by the loader. */
2540 else if (p->count != 0)
2542 srel = elf_section_data (p->sec)->sreloc;
2543 srel->size += p->count * sizeof (Elf32_External_Rel);
2544 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2545 && (info->flags & DF_TEXTREL) == 0)
2547 info->flags |= DF_TEXTREL;
2548 if (info->warn_shared_textrel && info->shared)
2549 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2550 p->sec->owner, p->sec);
2556 local_got = elf_local_got_refcounts (ibfd);
2560 symtab_hdr = &elf_symtab_hdr (ibfd);
2561 locsymcount = symtab_hdr->sh_info;
2562 end_local_got = local_got + locsymcount;
2563 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2564 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2566 srel = htab->elf.srelgot;
2567 for (; local_got < end_local_got;
2568 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2570 *local_tlsdesc_gotent = (bfd_vma) -1;
2573 if (GOT_TLS_GDESC_P (*local_tls_type))
2575 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2576 - elf_i386_compute_jump_table_size (htab);
2577 htab->elf.sgotplt->size += 8;
2578 *local_got = (bfd_vma) -2;
2580 if (! GOT_TLS_GDESC_P (*local_tls_type)
2581 || GOT_TLS_GD_P (*local_tls_type))
2583 *local_got = s->size;
2585 if (GOT_TLS_GD_P (*local_tls_type)
2586 || *local_tls_type == GOT_TLS_IE_BOTH)
2590 || GOT_TLS_GD_ANY_P (*local_tls_type)
2591 || (*local_tls_type & GOT_TLS_IE))
2593 if (*local_tls_type == GOT_TLS_IE_BOTH)
2594 srel->size += 2 * sizeof (Elf32_External_Rel);
2595 else if (GOT_TLS_GD_P (*local_tls_type)
2596 || ! GOT_TLS_GDESC_P (*local_tls_type))
2597 srel->size += sizeof (Elf32_External_Rel);
2598 if (GOT_TLS_GDESC_P (*local_tls_type))
2599 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2603 *local_got = (bfd_vma) -1;
2607 if (htab->tls_ldm_got.refcount > 0)
2609 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2611 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2612 htab->elf.sgot->size += 8;
2613 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2616 htab->tls_ldm_got.offset = -1;
2618 /* Allocate global sym .plt and .got entries, and space for global
2619 sym dynamic relocs. */
2620 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2622 /* Allocate .plt and .got entries, and space for local symbols. */
2623 htab_traverse (htab->loc_hash_table,
2624 elf_i386_allocate_local_dynrelocs,
2627 /* For every jump slot reserved in the sgotplt, reloc_count is
2628 incremented. However, when we reserve space for TLS descriptors,
2629 it's not incremented, so in order to compute the space reserved
2630 for them, it suffices to multiply the reloc count by the jump
2632 if (htab->elf.srelplt)
2633 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2635 if (htab->elf.sgotplt)
2637 struct elf_link_hash_entry *got;
2638 got = elf_link_hash_lookup (elf_hash_table (info),
2639 "_GLOBAL_OFFSET_TABLE_",
2640 FALSE, FALSE, FALSE);
2642 /* Don't allocate .got.plt section if there are no GOT nor PLT
2643 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2645 || !got->ref_regular_nonweak)
2646 && (htab->elf.sgotplt->size
2647 == get_elf_backend_data (output_bfd)->got_header_size)
2648 && (htab->elf.splt == NULL
2649 || htab->elf.splt->size == 0)
2650 && (htab->elf.sgot == NULL
2651 || htab->elf.sgot->size == 0)
2652 && (htab->elf.iplt == NULL
2653 || htab->elf.iplt->size == 0)
2654 && (htab->elf.igotplt == NULL
2655 || htab->elf.igotplt->size == 0))
2656 htab->elf.sgotplt->size = 0;
2659 /* We now have determined the sizes of the various dynamic sections.
2660 Allocate memory for them. */
2662 for (s = dynobj->sections; s != NULL; s = s->next)
2664 bfd_boolean strip_section = TRUE;
2666 if ((s->flags & SEC_LINKER_CREATED) == 0)
2669 if (s == htab->elf.splt
2670 || s == htab->elf.sgot
2671 || s == htab->elf.sgotplt
2672 || s == htab->elf.iplt
2673 || s == htab->elf.igotplt
2674 || s == htab->sdynbss)
2676 /* Strip this section if we don't need it; see the
2678 /* We'd like to strip these sections if they aren't needed, but if
2679 we've exported dynamic symbols from them we must leave them.
2680 It's too late to tell BFD to get rid of the symbols. */
2682 if (htab->elf.hplt != NULL)
2683 strip_section = FALSE;
2685 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2688 && s != htab->elf.srelplt
2689 && s != htab->srelplt2)
2692 /* We use the reloc_count field as a counter if we need
2693 to copy relocs into the output file. */
2698 /* It's not one of our sections, so don't allocate space. */
2704 /* If we don't need this section, strip it from the
2705 output file. This is mostly to handle .rel.bss and
2706 .rel.plt. We must create both sections in
2707 create_dynamic_sections, because they must be created
2708 before the linker maps input sections to output
2709 sections. The linker does that before
2710 adjust_dynamic_symbol is called, and it is that
2711 function which decides whether anything needs to go
2712 into these sections. */
2714 s->flags |= SEC_EXCLUDE;
2718 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2721 /* Allocate memory for the section contents. We use bfd_zalloc
2722 here in case unused entries are not reclaimed before the
2723 section's contents are written out. This should not happen,
2724 but this way if it does, we get a R_386_NONE reloc instead
2726 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2727 if (s->contents == NULL)
2731 if (htab->plt_eh_frame != NULL
2732 && htab->elf.splt != NULL
2733 && htab->elf.splt->size != 0
2734 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0)
2735 bfd_put_32 (dynobj, htab->elf.splt->size,
2736 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2738 if (htab->elf.dynamic_sections_created)
2740 /* Add some entries to the .dynamic section. We fill in the
2741 values later, in elf_i386_finish_dynamic_sections, but we
2742 must add the entries now so that we get the correct size for
2743 the .dynamic section. The DT_DEBUG entry is filled in by the
2744 dynamic linker and used by the debugger. */
2745 #define add_dynamic_entry(TAG, VAL) \
2746 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2748 if (info->executable)
2750 if (!add_dynamic_entry (DT_DEBUG, 0))
2754 if (htab->elf.splt->size != 0)
2756 if (!add_dynamic_entry (DT_PLTGOT, 0)
2757 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2758 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2759 || !add_dynamic_entry (DT_JMPREL, 0))
2765 if (!add_dynamic_entry (DT_REL, 0)
2766 || !add_dynamic_entry (DT_RELSZ, 0)
2767 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2770 /* If any dynamic relocs apply to a read-only section,
2771 then we need a DT_TEXTREL entry. */
2772 if ((info->flags & DF_TEXTREL) == 0)
2773 elf_link_hash_traverse (&htab->elf,
2774 elf_i386_readonly_dynrelocs, info);
2776 if ((info->flags & DF_TEXTREL) != 0)
2778 if (!add_dynamic_entry (DT_TEXTREL, 0))
2782 if (htab->is_vxworks
2783 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2786 #undef add_dynamic_entry
2792 elf_i386_always_size_sections (bfd *output_bfd,
2793 struct bfd_link_info *info)
2795 asection *tls_sec = elf_hash_table (info)->tls_sec;
2799 struct elf_link_hash_entry *tlsbase;
2801 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2802 "_TLS_MODULE_BASE_",
2803 FALSE, FALSE, FALSE);
2805 if (tlsbase && tlsbase->type == STT_TLS)
2807 struct elf_i386_link_hash_table *htab;
2808 struct bfd_link_hash_entry *bh = NULL;
2809 const struct elf_backend_data *bed
2810 = get_elf_backend_data (output_bfd);
2812 htab = elf_i386_hash_table (info);
2816 if (!(_bfd_generic_link_add_one_symbol
2817 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2818 tls_sec, 0, NULL, FALSE,
2819 bed->collect, &bh)))
2822 htab->tls_module_base = bh;
2824 tlsbase = (struct elf_link_hash_entry *)bh;
2825 tlsbase->def_regular = 1;
2826 tlsbase->other = STV_HIDDEN;
2827 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2834 /* Set the correct type for an x86 ELF section. We do this by the
2835 section name, which is a hack, but ought to work. */
2838 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2839 Elf_Internal_Shdr *hdr,
2844 name = bfd_get_section_name (abfd, sec);
2846 /* This is an ugly, but unfortunately necessary hack that is
2847 needed when producing EFI binaries on x86. It tells
2848 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2849 containing ELF relocation info. We need this hack in order to
2850 be able to generate ELF binaries that can be translated into
2851 EFI applications (which are essentially COFF objects). Those
2852 files contain a COFF ".reloc" section inside an ELFNN object,
2853 which would normally cause BFD to segfault because it would
2854 attempt to interpret this section as containing relocation
2855 entries for section "oc". With this hack enabled, ".reloc"
2856 will be treated as a normal data section, which will avoid the
2857 segfault. However, you won't be able to create an ELFNN binary
2858 with a section named "oc" that needs relocations, but that's
2859 the kind of ugly side-effects you get when detecting section
2860 types based on their names... In practice, this limitation is
2861 unlikely to bite. */
2862 if (strcmp (name, ".reloc") == 0)
2863 hdr->sh_type = SHT_PROGBITS;
2868 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2869 executables. Rather than setting it to the beginning of the TLS
2870 section, we have to set it to the end. This function may be called
2871 multiple times, it is idempotent. */
2874 elf_i386_set_tls_module_base (struct bfd_link_info *info)
2876 struct elf_i386_link_hash_table *htab;
2877 struct bfd_link_hash_entry *base;
2879 if (!info->executable)
2882 htab = elf_i386_hash_table (info);
2886 base = htab->tls_module_base;
2890 base->u.def.value = htab->elf.tls_size;
2893 /* Return the base VMA address which should be subtracted from real addresses
2894 when resolving @dtpoff relocation.
2895 This is PT_TLS segment p_vaddr. */
2898 elf_i386_dtpoff_base (struct bfd_link_info *info)
2900 /* If tls_sec is NULL, we should have signalled an error already. */
2901 if (elf_hash_table (info)->tls_sec == NULL)
2903 return elf_hash_table (info)->tls_sec->vma;
2906 /* Return the relocation value for @tpoff relocation
2907 if STT_TLS virtual address is ADDRESS. */
2910 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2912 struct elf_link_hash_table *htab = elf_hash_table (info);
2913 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2914 bfd_vma static_tls_size;
2916 /* If tls_sec is NULL, we should have signalled an error already. */
2917 if (htab->tls_sec == NULL)
2920 /* Consider special static TLS alignment requirements. */
2921 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2922 return static_tls_size + htab->tls_sec->vma - address;
2925 /* Relocate an i386 ELF section. */
2928 elf_i386_relocate_section (bfd *output_bfd,
2929 struct bfd_link_info *info,
2931 asection *input_section,
2933 Elf_Internal_Rela *relocs,
2934 Elf_Internal_Sym *local_syms,
2935 asection **local_sections)
2937 struct elf_i386_link_hash_table *htab;
2938 Elf_Internal_Shdr *symtab_hdr;
2939 struct elf_link_hash_entry **sym_hashes;
2940 bfd_vma *local_got_offsets;
2941 bfd_vma *local_tlsdesc_gotents;
2942 Elf_Internal_Rela *rel;
2943 Elf_Internal_Rela *relend;
2944 bfd_boolean is_vxworks_tls;
2946 BFD_ASSERT (is_i386_elf (input_bfd));
2948 htab = elf_i386_hash_table (info);
2951 symtab_hdr = &elf_symtab_hdr (input_bfd);
2952 sym_hashes = elf_sym_hashes (input_bfd);
2953 local_got_offsets = elf_local_got_offsets (input_bfd);
2954 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
2955 /* We have to handle relocations in vxworks .tls_vars sections
2956 specially, because the dynamic loader is 'weird'. */
2957 is_vxworks_tls = (htab->is_vxworks && info->shared
2958 && !strcmp (input_section->output_section->name,
2961 elf_i386_set_tls_module_base (info);
2964 relend = relocs + input_section->reloc_count;
2965 for (; rel < relend; rel++)
2967 unsigned int r_type;
2968 reloc_howto_type *howto;
2969 unsigned long r_symndx;
2970 struct elf_link_hash_entry *h;
2971 Elf_Internal_Sym *sym;
2973 bfd_vma off, offplt;
2975 bfd_boolean unresolved_reloc;
2976 bfd_reloc_status_type r;
2980 r_type = ELF32_R_TYPE (rel->r_info);
2981 if (r_type == R_386_GNU_VTINHERIT
2982 || r_type == R_386_GNU_VTENTRY)
2985 if ((indx = r_type) >= R_386_standard
2986 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2987 >= R_386_ext - R_386_standard)
2988 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2989 >= R_386_irelative - R_386_ext))
2991 (*_bfd_error_handler)
2992 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2993 input_bfd, input_section, r_type);
2994 bfd_set_error (bfd_error_bad_value);
2997 howto = elf_howto_table + indx;
2999 r_symndx = ELF32_R_SYM (rel->r_info);
3003 unresolved_reloc = FALSE;
3004 if (r_symndx < symtab_hdr->sh_info)
3006 sym = local_syms + r_symndx;
3007 sec = local_sections[r_symndx];
3008 relocation = (sec->output_section->vma
3009 + sec->output_offset
3012 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3013 && ((sec->flags & SEC_MERGE) != 0
3014 || (info->relocatable
3015 && sec->output_offset != 0)))
3018 bfd_byte *where = contents + rel->r_offset;
3020 switch (howto->size)
3023 addend = bfd_get_8 (input_bfd, where);
3024 if (howto->pc_relative)
3026 addend = (addend ^ 0x80) - 0x80;
3031 addend = bfd_get_16 (input_bfd, where);
3032 if (howto->pc_relative)
3034 addend = (addend ^ 0x8000) - 0x8000;
3039 addend = bfd_get_32 (input_bfd, where);
3040 if (howto->pc_relative)
3042 addend = (addend ^ 0x80000000) - 0x80000000;
3050 if (info->relocatable)
3051 addend += sec->output_offset;
3054 asection *msec = sec;
3055 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3057 addend -= relocation;
3058 addend += msec->output_section->vma + msec->output_offset;
3061 switch (howto->size)
3064 /* FIXME: overflow checks. */
3065 if (howto->pc_relative)
3067 bfd_put_8 (input_bfd, addend, where);
3070 if (howto->pc_relative)
3072 bfd_put_16 (input_bfd, addend, where);
3075 if (howto->pc_relative)
3077 bfd_put_32 (input_bfd, addend, where);
3081 else if (!info->relocatable
3082 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3084 /* Relocate against local STT_GNU_IFUNC symbol. */
3085 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3090 /* Set STT_GNU_IFUNC symbol value. */
3091 h->root.u.def.value = sym->st_value;
3092 h->root.u.def.section = sec;
3097 bfd_boolean warned ATTRIBUTE_UNUSED;
3099 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3100 r_symndx, symtab_hdr, sym_hashes,
3102 unresolved_reloc, warned);
3105 if (sec != NULL && elf_discarded_section (sec))
3106 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3107 rel, relend, howto, contents);
3109 if (info->relocatable)
3112 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3113 it here if it is defined in a non-shared object. */
3115 && h->type == STT_GNU_IFUNC
3118 asection *plt, *gotplt, *base_got;
3122 if ((input_section->flags & SEC_ALLOC) == 0
3123 || h->plt.offset == (bfd_vma) -1)
3126 /* STT_GNU_IFUNC symbol must go through PLT. */
3127 if (htab->elf.splt != NULL)
3129 plt = htab->elf.splt;
3130 gotplt = htab->elf.sgotplt;
3134 plt = htab->elf.iplt;
3135 gotplt = htab->elf.igotplt;
3138 relocation = (plt->output_section->vma
3139 + plt->output_offset + h->plt.offset);
3144 if (h->root.root.string)
3145 name = h->root.root.string;
3147 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3149 (*_bfd_error_handler)
3150 (_("%B: relocation %s against STT_GNU_IFUNC "
3151 "symbol `%s' isn't handled by %s"), input_bfd,
3152 elf_howto_table[r_type].name,
3153 name, __FUNCTION__);
3154 bfd_set_error (bfd_error_bad_value);
3158 /* Generate dynamic relcoation only when there is a
3159 non-GOF reference in a shared object. */
3160 if (info->shared && h->non_got_ref)
3162 Elf_Internal_Rela outrel;
3167 /* Need a dynamic relocation to get the real function
3169 offset = _bfd_elf_section_offset (output_bfd,
3173 if (offset == (bfd_vma) -1
3174 || offset == (bfd_vma) -2)
3177 outrel.r_offset = (input_section->output_section->vma
3178 + input_section->output_offset
3181 if (h->dynindx == -1
3183 || info->executable)
3185 /* This symbol is resolved locally. */
3186 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3187 bfd_put_32 (output_bfd,
3188 (h->root.u.def.value
3189 + h->root.u.def.section->output_section->vma
3190 + h->root.u.def.section->output_offset),
3194 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3196 sreloc = htab->elf.irelifunc;
3197 loc = sreloc->contents;
3198 loc += (sreloc->reloc_count++
3199 * sizeof (Elf32_External_Rel));
3200 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3202 /* If this reloc is against an external symbol, we
3203 do not want to fiddle with the addend. Otherwise,
3204 we need to include the symbol value so that it
3205 becomes an addend for the dynamic reloc. For an
3206 internal symbol, we have updated addend. */
3215 base_got = htab->elf.sgot;
3216 off = h->got.offset;
3218 if (base_got == NULL)
3221 if (off == (bfd_vma) -1)
3223 /* We can't use h->got.offset here to save state, or
3224 even just remember the offset, as finish_dynamic_symbol
3225 would use that as offset into .got. */
3227 if (htab->elf.splt != NULL)
3229 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3230 off = (plt_index + 3) * 4;
3231 base_got = htab->elf.sgotplt;
3235 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
3236 off = plt_index * 4;
3237 base_got = htab->elf.igotplt;
3240 if (h->dynindx == -1
3244 /* This references the local defitionion. We must
3245 initialize this entry in the global offset table.
3246 Since the offset must always be a multiple of 8,
3247 we use the least significant bit to record
3248 whether we have initialized it already.
3250 When doing a dynamic link, we create a .rela.got
3251 relocation entry to initialize the value. This
3252 is done in the finish_dynamic_symbol routine. */
3257 bfd_put_32 (output_bfd, relocation,
3258 base_got->contents + off);
3265 /* Adjust for static executables. */
3266 if (htab->elf.splt == NULL)
3267 relocation += gotplt->output_offset;
3271 relocation = (base_got->output_section->vma
3272 + base_got->output_offset + off
3273 - gotplt->output_section->vma
3274 - gotplt->output_offset);
3275 /* Adjust for static executables. */
3276 if (htab->elf.splt == NULL)
3277 relocation += gotplt->output_offset;
3283 relocation -= (gotplt->output_section->vma
3284 + gotplt->output_offset);
3292 /* Relocation is to the entry for this symbol in the global
3294 if (htab->elf.sgot == NULL)
3301 off = h->got.offset;
3302 dyn = htab->elf.dynamic_sections_created;
3303 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3305 && SYMBOL_REFERENCES_LOCAL (info, h))
3306 || (ELF_ST_VISIBILITY (h->other)
3307 && h->root.type == bfd_link_hash_undefweak))
3309 /* This is actually a static link, or it is a
3310 -Bsymbolic link and the symbol is defined
3311 locally, or the symbol was forced to be local
3312 because of a version file. We must initialize
3313 this entry in the global offset table. Since the
3314 offset must always be a multiple of 4, we use the
3315 least significant bit to record whether we have
3316 initialized it already.
3318 When doing a dynamic link, we create a .rel.got
3319 relocation entry to initialize the value. This
3320 is done in the finish_dynamic_symbol routine. */
3325 bfd_put_32 (output_bfd, relocation,
3326 htab->elf.sgot->contents + off);
3331 unresolved_reloc = FALSE;
3335 if (local_got_offsets == NULL)
3338 off = local_got_offsets[r_symndx];
3340 /* The offset must always be a multiple of 4. We use
3341 the least significant bit to record whether we have
3342 already generated the necessary reloc. */
3347 bfd_put_32 (output_bfd, relocation,
3348 htab->elf.sgot->contents + off);
3353 Elf_Internal_Rela outrel;
3356 s = htab->elf.srelgot;
3360 outrel.r_offset = (htab->elf.sgot->output_section->vma
3361 + htab->elf.sgot->output_offset
3363 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3365 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
3366 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3369 local_got_offsets[r_symndx] |= 1;
3373 if (off >= (bfd_vma) -2)
3376 relocation = htab->elf.sgot->output_section->vma
3377 + htab->elf.sgot->output_offset + off
3378 - htab->elf.sgotplt->output_section->vma
3379 - htab->elf.sgotplt->output_offset;
3383 /* Relocation is relative to the start of the global offset
3386 /* Check to make sure it isn't a protected function symbol
3387 for shared library since it may not be local when used
3388 as function address. We also need to make sure that a
3389 symbol is defined locally. */
3390 if (info->shared && h)
3392 if (!h->def_regular)
3396 switch (ELF_ST_VISIBILITY (h->other))
3399 v = _("hidden symbol");
3402 v = _("internal symbol");
3405 v = _("protected symbol");
3412 (*_bfd_error_handler)
3413 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3414 input_bfd, v, h->root.root.string);
3415 bfd_set_error (bfd_error_bad_value);
3418 else if (!info->executable
3419 && h->type == STT_FUNC
3420 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3422 (*_bfd_error_handler)
3423 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3424 input_bfd, h->root.root.string);
3425 bfd_set_error (bfd_error_bad_value);
3430 /* Note that sgot is not involved in this
3431 calculation. We always want the start of .got.plt. If we
3432 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3433 permitted by the ABI, we might have to change this
3435 relocation -= htab->elf.sgotplt->output_section->vma
3436 + htab->elf.sgotplt->output_offset;
3440 /* Use global offset table as symbol value. */
3441 relocation = htab->elf.sgotplt->output_section->vma
3442 + htab->elf.sgotplt->output_offset;
3443 unresolved_reloc = FALSE;
3447 /* Relocation is to the entry for this symbol in the
3448 procedure linkage table. */
3450 /* Resolve a PLT32 reloc against a local symbol directly,
3451 without using the procedure linkage table. */
3455 if (h->plt.offset == (bfd_vma) -1
3456 || htab->elf.splt == NULL)
3458 /* We didn't make a PLT entry for this symbol. This
3459 happens when statically linking PIC code, or when
3460 using -Bsymbolic. */
3464 relocation = (htab->elf.splt->output_section->vma
3465 + htab->elf.splt->output_offset
3467 unresolved_reloc = FALSE;
3472 if ((input_section->flags & SEC_ALLOC) == 0
3478 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3479 || h->root.type != bfd_link_hash_undefweak)
3480 && (r_type != R_386_PC32
3481 || !SYMBOL_CALLS_LOCAL (info, h)))
3482 || (ELIMINATE_COPY_RELOCS
3489 || h->root.type == bfd_link_hash_undefweak
3490 || h->root.type == bfd_link_hash_undefined)))
3492 Elf_Internal_Rela outrel;
3494 bfd_boolean skip, relocate;
3497 /* When generating a shared object, these relocations
3498 are copied into the output file to be resolved at run
3505 _bfd_elf_section_offset (output_bfd, info, input_section,
3507 if (outrel.r_offset == (bfd_vma) -1)
3509 else if (outrel.r_offset == (bfd_vma) -2)
3510 skip = TRUE, relocate = TRUE;
3511 outrel.r_offset += (input_section->output_section->vma
3512 + input_section->output_offset);
3515 memset (&outrel, 0, sizeof outrel);
3518 && (r_type == R_386_PC32
3520 || !SYMBOLIC_BIND (info, h)
3521 || !h->def_regular))
3522 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3525 /* This symbol is local, or marked to become local. */
3527 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3530 sreloc = elf_section_data (input_section)->sreloc;
3532 if (sreloc == NULL || sreloc->contents == NULL)
3534 r = bfd_reloc_notsupported;
3535 goto check_relocation_error;
3538 loc = sreloc->contents;
3539 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3541 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3543 /* If this reloc is against an external symbol, we do
3544 not want to fiddle with the addend. Otherwise, we
3545 need to include the symbol value so that it becomes
3546 an addend for the dynamic reloc. */
3553 if (!info->executable)
3555 Elf_Internal_Rela outrel;
3559 outrel.r_offset = rel->r_offset
3560 + input_section->output_section->vma
3561 + input_section->output_offset;
3562 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3563 sreloc = elf_section_data (input_section)->sreloc;
3566 loc = sreloc->contents;
3567 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3568 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3573 case R_386_TLS_GOTDESC:
3574 case R_386_TLS_DESC_CALL:
3575 case R_386_TLS_IE_32:
3576 case R_386_TLS_GOTIE:
3577 tls_type = GOT_UNKNOWN;
3578 if (h == NULL && local_got_offsets)
3579 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3581 tls_type = elf_i386_hash_entry(h)->tls_type;
3582 if (tls_type == GOT_TLS_IE)
3583 tls_type = GOT_TLS_IE_NEG;
3585 if (! elf_i386_tls_transition (info, input_bfd,
3586 input_section, contents,
3587 symtab_hdr, sym_hashes,
3588 &r_type, tls_type, rel,
3589 relend, h, r_symndx))
3592 if (r_type == R_386_TLS_LE_32)
3594 BFD_ASSERT (! unresolved_reloc);
3595 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3600 /* GD->LE transition. */
3601 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3604 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3606 movl %gs:0, %eax; subl $foo@tpoff, %eax
3607 (6 byte form of subl). */
3608 memcpy (contents + rel->r_offset - 3,
3609 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3610 roff = rel->r_offset + 5;
3614 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3616 movl %gs:0, %eax; subl $foo@tpoff, %eax
3617 (6 byte form of subl). */
3618 memcpy (contents + rel->r_offset - 2,
3619 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3620 roff = rel->r_offset + 6;
3622 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3624 /* Skip R_386_PC32/R_386_PLT32. */
3628 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3630 /* GDesc -> LE transition.
3631 It's originally something like:
3632 leal x@tlsdesc(%ebx), %eax
3636 Registers other than %eax may be set up here. */
3641 roff = rel->r_offset;
3642 val = bfd_get_8 (input_bfd, contents + roff - 1);
3644 /* Now modify the instruction as appropriate. */
3645 /* aoliva FIXME: remove the above and xor the byte
3647 bfd_put_8 (output_bfd, val ^ 0x86,
3648 contents + roff - 1);
3649 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3653 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3655 /* GDesc -> LE transition.
3663 roff = rel->r_offset;
3664 bfd_put_8 (output_bfd, 0x66, contents + roff);
3665 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3668 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3672 /* IE->LE transition:
3673 Originally it can be one of:
3681 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3684 /* movl foo, %eax. */
3685 bfd_put_8 (output_bfd, 0xb8,
3686 contents + rel->r_offset - 1);
3692 type = bfd_get_8 (input_bfd,
3693 contents + rel->r_offset - 2);
3698 bfd_put_8 (output_bfd, 0xc7,
3699 contents + rel->r_offset - 2);
3700 bfd_put_8 (output_bfd,
3701 0xc0 | ((val >> 3) & 7),
3702 contents + rel->r_offset - 1);
3706 bfd_put_8 (output_bfd, 0x81,
3707 contents + rel->r_offset - 2);
3708 bfd_put_8 (output_bfd,
3709 0xc0 | ((val >> 3) & 7),
3710 contents + rel->r_offset - 1);
3717 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3718 contents + rel->r_offset);
3723 unsigned int val, type;
3725 /* {IE_32,GOTIE}->LE transition:
3726 Originally it can be one of:
3727 subl foo(%reg1), %reg2
3728 movl foo(%reg1), %reg2
3729 addl foo(%reg1), %reg2
3732 movl $foo, %reg2 (6 byte form)
3733 addl $foo, %reg2. */
3734 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3735 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3739 bfd_put_8 (output_bfd, 0xc7,
3740 contents + rel->r_offset - 2);
3741 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3742 contents + rel->r_offset - 1);
3744 else if (type == 0x2b)
3747 bfd_put_8 (output_bfd, 0x81,
3748 contents + rel->r_offset - 2);
3749 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3750 contents + rel->r_offset - 1);
3752 else if (type == 0x03)
3755 bfd_put_8 (output_bfd, 0x81,
3756 contents + rel->r_offset - 2);
3757 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3758 contents + rel->r_offset - 1);
3762 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3763 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3764 contents + rel->r_offset);
3766 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3767 contents + rel->r_offset);
3772 if (htab->elf.sgot == NULL)
3777 off = h->got.offset;
3778 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
3782 if (local_got_offsets == NULL)
3785 off = local_got_offsets[r_symndx];
3786 offplt = local_tlsdesc_gotents[r_symndx];
3793 Elf_Internal_Rela outrel;
3798 if (htab->elf.srelgot == NULL)
3801 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3803 if (GOT_TLS_GDESC_P (tls_type))
3805 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3806 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3807 <= htab->elf.sgotplt->size);
3808 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3809 + htab->elf.sgotplt->output_offset
3811 + htab->sgotplt_jump_table_size);
3812 sreloc = htab->elf.srelplt;
3813 loc = sreloc->contents;
3814 loc += (htab->next_tls_desc_index++
3815 * sizeof (Elf32_External_Rel));
3816 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3817 <= sreloc->contents + sreloc->size);
3818 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3821 BFD_ASSERT (! unresolved_reloc);
3822 bfd_put_32 (output_bfd,
3823 relocation - elf_i386_dtpoff_base (info),
3824 htab->elf.sgotplt->contents + offplt
3825 + htab->sgotplt_jump_table_size + 4);
3829 bfd_put_32 (output_bfd, 0,
3830 htab->elf.sgotplt->contents + offplt
3831 + htab->sgotplt_jump_table_size + 4);
3835 sreloc = htab->elf.srelgot;
3837 outrel.r_offset = (htab->elf.sgot->output_section->vma
3838 + htab->elf.sgot->output_offset + off);
3840 if (GOT_TLS_GD_P (tls_type))
3841 dr_type = R_386_TLS_DTPMOD32;
3842 else if (GOT_TLS_GDESC_P (tls_type))
3844 else if (tls_type == GOT_TLS_IE_POS)
3845 dr_type = R_386_TLS_TPOFF;
3847 dr_type = R_386_TLS_TPOFF32;
3849 if (dr_type == R_386_TLS_TPOFF && indx == 0)
3850 bfd_put_32 (output_bfd,
3851 relocation - elf_i386_dtpoff_base (info),
3852 htab->elf.sgot->contents + off);
3853 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3854 bfd_put_32 (output_bfd,
3855 elf_i386_dtpoff_base (info) - relocation,
3856 htab->elf.sgot->contents + off);
3857 else if (dr_type != R_386_TLS_DESC)
3858 bfd_put_32 (output_bfd, 0,
3859 htab->elf.sgot->contents + off);
3860 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3862 loc = sreloc->contents;
3863 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3864 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3865 <= sreloc->contents + sreloc->size);
3866 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3868 if (GOT_TLS_GD_P (tls_type))
3872 BFD_ASSERT (! unresolved_reloc);
3873 bfd_put_32 (output_bfd,
3874 relocation - elf_i386_dtpoff_base (info),
3875 htab->elf.sgot->contents + off + 4);
3879 bfd_put_32 (output_bfd, 0,
3880 htab->elf.sgot->contents + off + 4);
3881 outrel.r_info = ELF32_R_INFO (indx,
3882 R_386_TLS_DTPOFF32);
3883 outrel.r_offset += 4;
3884 sreloc->reloc_count++;
3885 loc += sizeof (Elf32_External_Rel);
3886 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3887 <= sreloc->contents + sreloc->size);
3888 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3891 else if (tls_type == GOT_TLS_IE_BOTH)
3893 bfd_put_32 (output_bfd,
3895 ? relocation - elf_i386_dtpoff_base (info)
3897 htab->elf.sgot->contents + off + 4);
3898 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3899 outrel.r_offset += 4;
3900 sreloc->reloc_count++;
3901 loc += sizeof (Elf32_External_Rel);
3902 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3909 local_got_offsets[r_symndx] |= 1;
3912 if (off >= (bfd_vma) -2
3913 && ! GOT_TLS_GDESC_P (tls_type))
3915 if (r_type == R_386_TLS_GOTDESC
3916 || r_type == R_386_TLS_DESC_CALL)
3918 relocation = htab->sgotplt_jump_table_size + offplt;
3919 unresolved_reloc = FALSE;
3921 else if (r_type == ELF32_R_TYPE (rel->r_info))
3923 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3924 + htab->elf.sgotplt->output_offset;
3925 relocation = htab->elf.sgot->output_section->vma
3926 + htab->elf.sgot->output_offset + off - g_o_t;
3927 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3928 && tls_type == GOT_TLS_IE_BOTH)
3930 if (r_type == R_386_TLS_IE)
3931 relocation += g_o_t;
3932 unresolved_reloc = FALSE;
3934 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3936 unsigned int val, type;
3939 /* GD->IE transition. */
3940 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3941 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3944 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3946 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3948 roff = rel->r_offset - 3;
3952 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3954 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3955 roff = rel->r_offset - 2;
3957 memcpy (contents + roff,
3958 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3959 contents[roff + 7] = 0x80 | (val & 7);
3960 /* If foo is used only with foo@gotntpoff(%reg) and
3961 foo@indntpoff, but not with foo@gottpoff(%reg), change
3962 subl $foo@gottpoff(%reg), %eax
3964 addl $foo@gotntpoff(%reg), %eax. */
3965 if (tls_type == GOT_TLS_IE_POS)
3966 contents[roff + 6] = 0x03;
3967 bfd_put_32 (output_bfd,
3968 htab->elf.sgot->output_section->vma
3969 + htab->elf.sgot->output_offset + off
3970 - htab->elf.sgotplt->output_section->vma
3971 - htab->elf.sgotplt->output_offset,
3972 contents + roff + 8);
3973 /* Skip R_386_PLT32. */
3977 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3979 /* GDesc -> IE transition.
3980 It's originally something like:
3981 leal x@tlsdesc(%ebx), %eax
3984 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3986 movl x@gottpoff(%ebx), %eax # before negl %eax
3988 Registers other than %eax may be set up here. */
3992 /* First, make sure it's a leal adding ebx to a 32-bit
3993 offset into any register, although it's probably
3994 almost always going to be eax. */
3995 roff = rel->r_offset;
3997 /* Now modify the instruction as appropriate. */
3998 /* To turn a leal into a movl in the form we use it, it
3999 suffices to change the first byte from 0x8d to 0x8b.
4000 aoliva FIXME: should we decide to keep the leal, all
4001 we have to do is remove the statement below, and
4002 adjust the relaxation of R_386_TLS_DESC_CALL. */
4003 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4005 if (tls_type == GOT_TLS_IE_BOTH)
4008 bfd_put_32 (output_bfd,
4009 htab->elf.sgot->output_section->vma
4010 + htab->elf.sgot->output_offset + off
4011 - htab->elf.sgotplt->output_section->vma
4012 - htab->elf.sgotplt->output_offset,
4016 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4018 /* GDesc -> IE transition.
4026 depending on how we transformed the TLS_GOTDESC above.
4031 roff = rel->r_offset;
4033 /* Now modify the instruction as appropriate. */
4034 if (tls_type != GOT_TLS_IE_NEG)
4037 bfd_put_8 (output_bfd, 0x66, contents + roff);
4038 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4043 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4044 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4054 if (! elf_i386_tls_transition (info, input_bfd,
4055 input_section, contents,
4056 symtab_hdr, sym_hashes,
4057 &r_type, GOT_UNKNOWN, rel,
4058 relend, h, r_symndx))
4061 if (r_type != R_386_TLS_LDM)
4063 /* LD->LE transition:
4064 leal foo(%reg), %eax; call ___tls_get_addr.
4066 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4067 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4068 memcpy (contents + rel->r_offset - 2,
4069 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4070 /* Skip R_386_PC32/R_386_PLT32. */
4075 if (htab->elf.sgot == NULL)
4078 off = htab->tls_ldm_got.offset;
4083 Elf_Internal_Rela outrel;
4086 if (htab->elf.srelgot == NULL)
4089 outrel.r_offset = (htab->elf.sgot->output_section->vma
4090 + htab->elf.sgot->output_offset + off);
4092 bfd_put_32 (output_bfd, 0,
4093 htab->elf.sgot->contents + off);
4094 bfd_put_32 (output_bfd, 0,
4095 htab->elf.sgot->contents + off + 4);
4096 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4097 loc = htab->elf.srelgot->contents;
4098 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4099 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4100 htab->tls_ldm_got.offset |= 1;
4102 relocation = htab->elf.sgot->output_section->vma
4103 + htab->elf.sgot->output_offset + off
4104 - htab->elf.sgotplt->output_section->vma
4105 - htab->elf.sgotplt->output_offset;
4106 unresolved_reloc = FALSE;
4109 case R_386_TLS_LDO_32:
4110 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
4111 relocation -= elf_i386_dtpoff_base (info);
4113 /* When converting LDO to LE, we must negate. */
4114 relocation = -elf_i386_tpoff (info, relocation);
4117 case R_386_TLS_LE_32:
4119 if (!info->executable)
4121 Elf_Internal_Rela outrel;
4125 outrel.r_offset = rel->r_offset
4126 + input_section->output_section->vma
4127 + input_section->output_offset;
4128 if (h != NULL && h->dynindx != -1)
4132 if (r_type == R_386_TLS_LE_32)
4133 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4135 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4136 sreloc = elf_section_data (input_section)->sreloc;
4139 loc = sreloc->contents;
4140 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
4141 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4144 else if (r_type == R_386_TLS_LE_32)
4145 relocation = elf_i386_dtpoff_base (info) - relocation;
4147 relocation -= elf_i386_dtpoff_base (info);
4149 else if (r_type == R_386_TLS_LE_32)
4150 relocation = elf_i386_tpoff (info, relocation);
4152 relocation = -elf_i386_tpoff (info, relocation);
4159 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4160 because such sections are not SEC_ALLOC and thus ld.so will
4161 not process them. */
4162 if (unresolved_reloc
4163 && !((input_section->flags & SEC_DEBUGGING) != 0
4166 (*_bfd_error_handler)
4167 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4170 (long) rel->r_offset,
4172 h->root.root.string);
4177 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4178 contents, rel->r_offset,
4181 check_relocation_error:
4182 if (r != bfd_reloc_ok)
4187 name = h->root.root.string;
4190 name = bfd_elf_string_from_elf_section (input_bfd,
4191 symtab_hdr->sh_link,
4196 name = bfd_section_name (input_bfd, sec);
4199 if (r == bfd_reloc_overflow)
4201 if (! ((*info->callbacks->reloc_overflow)
4202 (info, (h ? &h->root : NULL), name, howto->name,
4203 (bfd_vma) 0, input_bfd, input_section,
4209 (*_bfd_error_handler)
4210 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4211 input_bfd, input_section,
4212 (long) rel->r_offset, name, (int) r);
4221 /* Finish up dynamic symbol handling. We set the contents of various
4222 dynamic sections here. */
4225 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4226 struct bfd_link_info *info,
4227 struct elf_link_hash_entry *h,
4228 Elf_Internal_Sym *sym)
4230 struct elf_i386_link_hash_table *htab;
4232 htab = elf_i386_hash_table (info);
4236 if (h->plt.offset != (bfd_vma) -1)
4240 Elf_Internal_Rela rel;
4242 asection *plt, *gotplt, *relplt;
4244 /* When building a static executable, use .iplt, .igot.plt and
4245 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4246 if (htab->elf.splt != NULL)
4248 plt = htab->elf.splt;
4249 gotplt = htab->elf.sgotplt;
4250 relplt = htab->elf.srelplt;
4254 plt = htab->elf.iplt;
4255 gotplt = htab->elf.igotplt;
4256 relplt = htab->elf.irelplt;
4259 /* This symbol has an entry in the procedure linkage table. Set
4262 if ((h->dynindx == -1
4263 && !((h->forced_local || info->executable)
4265 && h->type == STT_GNU_IFUNC))
4271 /* Get the index in the procedure linkage table which
4272 corresponds to this symbol. This is the index of this symbol
4273 in all the symbols for which we are making plt entries. The
4274 first entry in the procedure linkage table is reserved.
4276 Get the offset into the .got table of the entry that
4277 corresponds to this function. Each .got entry is 4 bytes.
4278 The first three are reserved.
4280 For static executables, we don't reserve anything. */
4282 if (plt == htab->elf.splt)
4284 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
4285 got_offset = (plt_index + 3) * 4;
4289 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
4290 got_offset = plt_index * 4;
4293 /* Fill in the entry in the procedure linkage table. */
4296 memcpy (plt->contents + h->plt.offset, elf_i386_plt_entry,
4298 bfd_put_32 (output_bfd,
4299 (gotplt->output_section->vma
4300 + gotplt->output_offset
4302 plt->contents + h->plt.offset + 2);
4304 if (htab->is_vxworks)
4306 int s, k, reloc_index;
4308 /* Create the R_386_32 relocation referencing the GOT
4309 for this PLT entry. */
4311 /* S: Current slot number (zero-based). */
4312 s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
4313 /* K: Number of relocations for PLTResolve. */
4315 k = PLTRESOLVE_RELOCS_SHLIB;
4317 k = PLTRESOLVE_RELOCS;
4318 /* Skip the PLTresolve relocations, and the relocations for
4319 the other PLT slots. */
4320 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4321 loc = (htab->srelplt2->contents + reloc_index
4322 * sizeof (Elf32_External_Rel));
4324 rel.r_offset = (htab->elf.splt->output_section->vma
4325 + htab->elf.splt->output_offset
4326 + h->plt.offset + 2),
4327 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4328 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4330 /* Create the R_386_32 relocation referencing the beginning of
4331 the PLT for this GOT entry. */
4332 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4333 + htab->elf.sgotplt->output_offset
4335 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4336 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4337 loc + sizeof (Elf32_External_Rel));
4342 memcpy (plt->contents + h->plt.offset, elf_i386_pic_plt_entry,
4344 bfd_put_32 (output_bfd, got_offset,
4345 plt->contents + h->plt.offset + 2);
4348 /* Don't fill PLT entry for static executables. */
4349 if (plt == htab->elf.splt)
4351 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4352 plt->contents + h->plt.offset + 7);
4353 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
4354 plt->contents + h->plt.offset + 12);
4357 /* Fill in the entry in the global offset table. */
4358 bfd_put_32 (output_bfd,
4359 (plt->output_section->vma
4360 + plt->output_offset
4363 gotplt->contents + got_offset);
4365 /* Fill in the entry in the .rel.plt section. */
4366 rel.r_offset = (gotplt->output_section->vma
4367 + gotplt->output_offset
4369 if (h->dynindx == -1
4370 || ((info->executable
4371 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4373 && h->type == STT_GNU_IFUNC))
4375 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4376 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4377 in the .got.plt section. */
4378 bfd_put_32 (output_bfd,
4379 (h->root.u.def.value
4380 + h->root.u.def.section->output_section->vma
4381 + h->root.u.def.section->output_offset),
4382 gotplt->contents + got_offset);
4383 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4386 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4387 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4388 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4390 if (!h->def_regular)
4392 /* Mark the symbol as undefined, rather than as defined in
4393 the .plt section. Leave the value if there were any
4394 relocations where pointer equality matters (this is a clue
4395 for the dynamic linker, to make function pointer
4396 comparisons work between an application and shared
4397 library), otherwise set it to zero. If a function is only
4398 called from a binary, there is no need to slow down
4399 shared libraries because of that. */
4400 sym->st_shndx = SHN_UNDEF;
4401 if (!h->pointer_equality_needed)
4406 if (h->got.offset != (bfd_vma) -1
4407 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4408 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4410 Elf_Internal_Rela rel;
4413 /* This symbol has an entry in the global offset table. Set it
4416 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4419 rel.r_offset = (htab->elf.sgot->output_section->vma
4420 + htab->elf.sgot->output_offset
4421 + (h->got.offset & ~(bfd_vma) 1));
4423 /* If this is a static link, or it is a -Bsymbolic link and the
4424 symbol is defined locally or was forced to be local because
4425 of a version file, we just want to emit a RELATIVE reloc.
4426 The entry in the global offset table will already have been
4427 initialized in the relocate_section function. */
4429 && h->type == STT_GNU_IFUNC)
4433 /* Generate R_386_GLOB_DAT. */
4440 if (!h->pointer_equality_needed)
4443 /* For non-shared object, we can't use .got.plt, which
4444 contains the real function addres if we need pointer
4445 equality. We load the GOT entry with the PLT entry. */
4446 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4447 bfd_put_32 (output_bfd,
4448 (plt->output_section->vma
4449 + plt->output_offset + h->plt.offset),
4450 htab->elf.sgot->contents + h->got.offset);
4454 else if (info->shared
4455 && SYMBOL_REFERENCES_LOCAL (info, h))
4457 BFD_ASSERT((h->got.offset & 1) != 0);
4458 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4462 BFD_ASSERT((h->got.offset & 1) == 0);
4464 bfd_put_32 (output_bfd, (bfd_vma) 0,
4465 htab->elf.sgot->contents + h->got.offset);
4466 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4469 loc = htab->elf.srelgot->contents;
4470 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4471 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4476 Elf_Internal_Rela rel;
4479 /* This symbol needs a copy reloc. Set it up. */
4481 if (h->dynindx == -1
4482 || (h->root.type != bfd_link_hash_defined
4483 && h->root.type != bfd_link_hash_defweak)
4484 || htab->srelbss == NULL)
4487 rel.r_offset = (h->root.u.def.value
4488 + h->root.u.def.section->output_section->vma
4489 + h->root.u.def.section->output_offset);
4490 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4491 loc = htab->srelbss->contents;
4492 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
4493 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4496 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
4497 be NULL for local symbols.
4499 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4500 is relative to the ".got" section. */
4502 && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4503 || (!htab->is_vxworks && h == htab->elf.hgot)))
4504 sym->st_shndx = SHN_ABS;
4509 /* Finish up local dynamic symbol handling. We set the contents of
4510 various dynamic sections here. */
4513 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4515 struct elf_link_hash_entry *h
4516 = (struct elf_link_hash_entry *) *slot;
4517 struct bfd_link_info *info
4518 = (struct bfd_link_info *) inf;
4520 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4524 /* Used to decide how to sort relocs in an optimal manner for the
4525 dynamic linker, before writing them out. */
4527 static enum elf_reloc_type_class
4528 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
4530 switch (ELF32_R_TYPE (rela->r_info))
4532 case R_386_RELATIVE:
4533 return reloc_class_relative;
4534 case R_386_JUMP_SLOT:
4535 return reloc_class_plt;
4537 return reloc_class_copy;
4539 return reloc_class_normal;
4543 /* Finish up the dynamic sections. */
4546 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4547 struct bfd_link_info *info)
4549 struct elf_i386_link_hash_table *htab;
4553 htab = elf_i386_hash_table (info);
4557 dynobj = htab->elf.dynobj;
4558 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4560 if (htab->elf.dynamic_sections_created)
4562 Elf32_External_Dyn *dyncon, *dynconend;
4564 if (sdyn == NULL || htab->elf.sgot == NULL)
4567 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4568 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4569 for (; dyncon < dynconend; dyncon++)
4571 Elf_Internal_Dyn dyn;
4574 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4579 if (htab->is_vxworks
4580 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4585 s = htab->elf.sgotplt;
4586 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4590 s = htab->elf.srelplt;
4591 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4595 s = htab->elf.srelplt;
4596 dyn.d_un.d_val = s->size;
4600 /* My reading of the SVR4 ABI indicates that the
4601 procedure linkage table relocs (DT_JMPREL) should be
4602 included in the overall relocs (DT_REL). This is
4603 what Solaris does. However, UnixWare can not handle
4604 that case. Therefore, we override the DT_RELSZ entry
4605 here to make it not include the JMPREL relocs. */
4606 s = htab->elf.srelplt;
4609 dyn.d_un.d_val -= s->size;
4613 /* We may not be using the standard ELF linker script.
4614 If .rel.plt is the first .rel section, we adjust
4615 DT_REL to not include it. */
4616 s = htab->elf.srelplt;
4619 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4621 dyn.d_un.d_ptr += s->size;
4625 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4628 /* Fill in the first entry in the procedure linkage table. */
4629 if (htab->elf.splt && htab->elf.splt->size > 0)
4633 memcpy (htab->elf.splt->contents, elf_i386_pic_plt0_entry,
4634 sizeof (elf_i386_pic_plt0_entry));
4635 memset (htab->elf.splt->contents + sizeof (elf_i386_pic_plt0_entry),
4636 htab->plt0_pad_byte,
4637 PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
4641 memcpy (htab->elf.splt->contents, elf_i386_plt0_entry,
4642 sizeof(elf_i386_plt0_entry));
4643 memset (htab->elf.splt->contents + sizeof (elf_i386_plt0_entry),
4644 htab->plt0_pad_byte,
4645 PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
4646 bfd_put_32 (output_bfd,
4647 (htab->elf.sgotplt->output_section->vma
4648 + htab->elf.sgotplt->output_offset
4650 htab->elf.splt->contents + 2);
4651 bfd_put_32 (output_bfd,
4652 (htab->elf.sgotplt->output_section->vma
4653 + htab->elf.sgotplt->output_offset
4655 htab->elf.splt->contents + 8);
4657 if (htab->is_vxworks)
4659 Elf_Internal_Rela rel;
4661 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4662 On IA32 we use REL relocations so the addend goes in
4663 the PLT directly. */
4664 rel.r_offset = (htab->elf.splt->output_section->vma
4665 + htab->elf.splt->output_offset
4667 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4668 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4669 htab->srelplt2->contents);
4670 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4671 rel.r_offset = (htab->elf.splt->output_section->vma
4672 + htab->elf.splt->output_offset
4674 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4675 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4676 htab->srelplt2->contents +
4677 sizeof (Elf32_External_Rel));
4681 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4682 really seem like the right value. */
4683 elf_section_data (htab->elf.splt->output_section)
4684 ->this_hdr.sh_entsize = 4;
4686 /* Correct the .rel.plt.unloaded relocations. */
4687 if (htab->is_vxworks && !info->shared)
4689 int num_plts = (htab->elf.splt->size / PLT_ENTRY_SIZE) - 1;
4692 p = htab->srelplt2->contents;
4694 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4696 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4698 for (; num_plts; num_plts--)
4700 Elf_Internal_Rela rel;
4701 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4702 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4703 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4704 p += sizeof (Elf32_External_Rel);
4706 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4707 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4708 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4709 p += sizeof (Elf32_External_Rel);
4715 if (htab->elf.sgotplt)
4717 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4719 (*_bfd_error_handler)
4720 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4724 /* Fill in the first three entries in the global offset table. */
4725 if (htab->elf.sgotplt->size > 0)
4727 bfd_put_32 (output_bfd,
4729 : sdyn->output_section->vma + sdyn->output_offset),
4730 htab->elf.sgotplt->contents);
4731 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4732 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
4735 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
4738 /* Adjust .eh_frame for .plt section. */
4739 if (htab->plt_eh_frame != NULL)
4741 if (htab->elf.splt != NULL
4742 && htab->elf.splt->size != 0
4743 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
4744 && htab->elf.splt->output_section != NULL
4745 && htab->plt_eh_frame->output_section != NULL)
4747 bfd_vma plt_start = htab->elf.splt->output_section->vma;
4748 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
4749 + htab->plt_eh_frame->output_offset
4750 + PLT_FDE_START_OFFSET;
4751 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
4752 htab->plt_eh_frame->contents
4753 + PLT_FDE_START_OFFSET);
4755 if (htab->plt_eh_frame->sec_info_type
4756 == ELF_INFO_TYPE_EH_FRAME)
4758 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
4760 htab->plt_eh_frame->contents))
4765 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4766 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
4768 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4769 htab_traverse (htab->loc_hash_table,
4770 elf_i386_finish_local_dynamic_symbol,
4776 /* Return address for Ith PLT stub in section PLT, for relocation REL
4777 or (bfd_vma) -1 if it should not be included. */
4780 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
4781 const arelent *rel ATTRIBUTE_UNUSED)
4783 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4786 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4789 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
4791 if (h->plt.offset != (bfd_vma) -1
4793 && !h->pointer_equality_needed)
4796 return _bfd_elf_hash_symbol (h);
4799 /* Hook called by the linker routine which adds symbols from an object
4803 elf_i386_add_symbol_hook (bfd * abfd,
4804 struct bfd_link_info * info ATTRIBUTE_UNUSED,
4805 Elf_Internal_Sym * sym,
4806 const char ** namep ATTRIBUTE_UNUSED,
4807 flagword * flagsp ATTRIBUTE_UNUSED,
4808 asection ** secp ATTRIBUTE_UNUSED,
4809 bfd_vma * valp ATTRIBUTE_UNUSED)
4811 if ((abfd->flags & DYNAMIC) == 0
4812 && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC
4813 || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE))
4814 elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE;
4819 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
4820 #define TARGET_LITTLE_NAME "elf32-i386"
4821 #define ELF_ARCH bfd_arch_i386
4822 #define ELF_TARGET_ID I386_ELF_DATA
4823 #define ELF_MACHINE_CODE EM_386
4824 #define ELF_MAXPAGESIZE 0x1000
4826 #define elf_backend_can_gc_sections 1
4827 #define elf_backend_can_refcount 1
4828 #define elf_backend_want_got_plt 1
4829 #define elf_backend_plt_readonly 1
4830 #define elf_backend_want_plt_sym 0
4831 #define elf_backend_got_header_size 12
4832 #define elf_backend_plt_alignment 4
4834 /* Support RELA for objdump of prelink objects. */
4835 #define elf_info_to_howto elf_i386_info_to_howto_rel
4836 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4838 #define bfd_elf32_mkobject elf_i386_mkobject
4840 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4841 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
4842 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
4843 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4844 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4846 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4847 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4848 #define elf_backend_check_relocs elf_i386_check_relocs
4849 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
4850 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
4851 #define elf_backend_fake_sections elf_i386_fake_sections
4852 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4853 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4854 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4855 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
4856 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4857 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4858 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4859 #define elf_backend_relocate_section elf_i386_relocate_section
4860 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4861 #define elf_backend_always_size_sections elf_i386_always_size_sections
4862 #define elf_backend_omit_section_dynsym \
4863 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4864 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
4865 #define elf_backend_hash_symbol elf_i386_hash_symbol
4866 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
4867 #undef elf_backend_post_process_headers
4868 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4870 #include "elf32-target.h"
4872 /* FreeBSD support. */
4874 #undef TARGET_LITTLE_SYM
4875 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4876 #undef TARGET_LITTLE_NAME
4877 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4879 #define ELF_OSABI ELFOSABI_FREEBSD
4881 /* The kernel recognizes executables as valid only if they carry a
4882 "FreeBSD" label in the ELF header. So we put this label on all
4883 executables and (for simplicity) also all other object files. */
4886 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
4888 _bfd_elf_set_osabi (abfd, info);
4890 #ifdef OLD_FREEBSD_ABI_LABEL
4891 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4892 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4896 #undef elf_backend_post_process_headers
4897 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4899 #define elf32_bed elf32_i386_fbsd_bed
4901 #undef elf_backend_add_symbol_hook
4903 #include "elf32-target.h"
4907 #undef TARGET_LITTLE_SYM
4908 #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
4909 #undef TARGET_LITTLE_NAME
4910 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
4912 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4913 objects won't be recognized. */
4917 #define elf32_bed elf32_i386_sol2_bed
4919 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4921 #undef elf_backend_static_tls_alignment
4922 #define elf_backend_static_tls_alignment 8
4924 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4926 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4928 #undef elf_backend_want_plt_sym
4929 #define elf_backend_want_plt_sym 1
4931 #include "elf32-target.h"
4933 /* VxWorks support. */
4935 #undef TARGET_LITTLE_SYM
4936 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4937 #undef TARGET_LITTLE_NAME
4938 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4941 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4943 static struct bfd_link_hash_table *
4944 elf_i386_vxworks_link_hash_table_create (bfd *abfd)
4946 struct bfd_link_hash_table *ret;
4947 struct elf_i386_link_hash_table *htab;
4949 ret = elf_i386_link_hash_table_create (abfd);
4952 htab = (struct elf_i386_link_hash_table *) ret;
4953 htab->is_vxworks = 1;
4954 htab->plt0_pad_byte = 0x90;
4961 #undef elf_backend_relocs_compatible
4962 #undef elf_backend_post_process_headers
4963 #undef bfd_elf32_bfd_link_hash_table_create
4964 #define bfd_elf32_bfd_link_hash_table_create \
4965 elf_i386_vxworks_link_hash_table_create
4966 #undef elf_backend_add_symbol_hook
4967 #define elf_backend_add_symbol_hook \
4968 elf_vxworks_add_symbol_hook
4969 #undef elf_backend_link_output_symbol_hook
4970 #define elf_backend_link_output_symbol_hook \
4971 elf_vxworks_link_output_symbol_hook
4972 #undef elf_backend_emit_relocs
4973 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4974 #undef elf_backend_final_write_processing
4975 #define elf_backend_final_write_processing \
4976 elf_vxworks_final_write_processing
4977 #undef elf_backend_static_tls_alignment
4979 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4981 #undef elf_backend_want_plt_sym
4982 #define elf_backend_want_plt_sym 1
4985 #define elf32_bed elf32_i386_vxworks_bed
4987 #include "elf32-target.h"