1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2016 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
32 #include "opcode/i386.h"
34 /* 386 uses REL relocations instead of RELA. */
39 static reloc_howto_type elf_howto_table[]=
41 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
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),
135 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
136 bfd_elf_generic_reloc, "R_386_SIZE32",
137 TRUE, 0xffffffff, 0xffffffff, FALSE),
138 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
140 TRUE, 0xffffffff, 0xffffffff, FALSE),
141 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
142 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
144 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_386_TLS_DESC",
146 TRUE, 0xffffffff, 0xffffffff, FALSE),
147 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_386_IRELATIVE",
149 TRUE, 0xffffffff, 0xffffffff, FALSE),
150 HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_386_GOT32X",
152 TRUE, 0xffffffff, 0xffffffff, FALSE),
155 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
156 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
158 /* GNU extension to record C++ vtable hierarchy. */
159 HOWTO (R_386_GNU_VTINHERIT, /* type */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
163 FALSE, /* pc_relative */
165 complain_overflow_dont, /* complain_on_overflow */
166 NULL, /* special_function */
167 "R_386_GNU_VTINHERIT", /* name */
168 FALSE, /* partial_inplace */
171 FALSE), /* pcrel_offset */
173 /* GNU extension to record C++ vtable member usage. */
174 HOWTO (R_386_GNU_VTENTRY, /* type */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
178 FALSE, /* pc_relative */
180 complain_overflow_dont, /* complain_on_overflow */
181 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
182 "R_386_GNU_VTENTRY", /* name */
183 FALSE, /* partial_inplace */
186 FALSE) /* pcrel_offset */
188 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
192 #ifdef DEBUG_GEN_RELOC
194 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
199 static reloc_howto_type *
200 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
201 bfd_reloc_code_real_type code)
206 TRACE ("BFD_RELOC_NONE");
207 return &elf_howto_table[R_386_NONE];
210 TRACE ("BFD_RELOC_32");
211 return &elf_howto_table[R_386_32];
214 TRACE ("BFD_RELOC_CTOR");
215 return &elf_howto_table[R_386_32];
217 case BFD_RELOC_32_PCREL:
218 TRACE ("BFD_RELOC_PC32");
219 return &elf_howto_table[R_386_PC32];
221 case BFD_RELOC_386_GOT32:
222 TRACE ("BFD_RELOC_386_GOT32");
223 return &elf_howto_table[R_386_GOT32];
225 case BFD_RELOC_386_PLT32:
226 TRACE ("BFD_RELOC_386_PLT32");
227 return &elf_howto_table[R_386_PLT32];
229 case BFD_RELOC_386_COPY:
230 TRACE ("BFD_RELOC_386_COPY");
231 return &elf_howto_table[R_386_COPY];
233 case BFD_RELOC_386_GLOB_DAT:
234 TRACE ("BFD_RELOC_386_GLOB_DAT");
235 return &elf_howto_table[R_386_GLOB_DAT];
237 case BFD_RELOC_386_JUMP_SLOT:
238 TRACE ("BFD_RELOC_386_JUMP_SLOT");
239 return &elf_howto_table[R_386_JUMP_SLOT];
241 case BFD_RELOC_386_RELATIVE:
242 TRACE ("BFD_RELOC_386_RELATIVE");
243 return &elf_howto_table[R_386_RELATIVE];
245 case BFD_RELOC_386_GOTOFF:
246 TRACE ("BFD_RELOC_386_GOTOFF");
247 return &elf_howto_table[R_386_GOTOFF];
249 case BFD_RELOC_386_GOTPC:
250 TRACE ("BFD_RELOC_386_GOTPC");
251 return &elf_howto_table[R_386_GOTPC];
253 /* These relocs are a GNU extension. */
254 case BFD_RELOC_386_TLS_TPOFF:
255 TRACE ("BFD_RELOC_386_TLS_TPOFF");
256 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
258 case BFD_RELOC_386_TLS_IE:
259 TRACE ("BFD_RELOC_386_TLS_IE");
260 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
262 case BFD_RELOC_386_TLS_GOTIE:
263 TRACE ("BFD_RELOC_386_TLS_GOTIE");
264 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
266 case BFD_RELOC_386_TLS_LE:
267 TRACE ("BFD_RELOC_386_TLS_LE");
268 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
270 case BFD_RELOC_386_TLS_GD:
271 TRACE ("BFD_RELOC_386_TLS_GD");
272 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
274 case BFD_RELOC_386_TLS_LDM:
275 TRACE ("BFD_RELOC_386_TLS_LDM");
276 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
279 TRACE ("BFD_RELOC_16");
280 return &elf_howto_table[R_386_16 - R_386_ext_offset];
282 case BFD_RELOC_16_PCREL:
283 TRACE ("BFD_RELOC_16_PCREL");
284 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
287 TRACE ("BFD_RELOC_8");
288 return &elf_howto_table[R_386_8 - R_386_ext_offset];
290 case BFD_RELOC_8_PCREL:
291 TRACE ("BFD_RELOC_8_PCREL");
292 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
294 /* Common with Sun TLS implementation. */
295 case BFD_RELOC_386_TLS_LDO_32:
296 TRACE ("BFD_RELOC_386_TLS_LDO_32");
297 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
299 case BFD_RELOC_386_TLS_IE_32:
300 TRACE ("BFD_RELOC_386_TLS_IE_32");
301 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
303 case BFD_RELOC_386_TLS_LE_32:
304 TRACE ("BFD_RELOC_386_TLS_LE_32");
305 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
307 case BFD_RELOC_386_TLS_DTPMOD32:
308 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
309 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
311 case BFD_RELOC_386_TLS_DTPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
313 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
315 case BFD_RELOC_386_TLS_TPOFF32:
316 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
317 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
319 case BFD_RELOC_SIZE32:
320 TRACE ("BFD_RELOC_SIZE32");
321 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
323 case BFD_RELOC_386_TLS_GOTDESC:
324 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
325 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
327 case BFD_RELOC_386_TLS_DESC_CALL:
328 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
329 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
331 case BFD_RELOC_386_TLS_DESC:
332 TRACE ("BFD_RELOC_386_TLS_DESC");
333 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
335 case BFD_RELOC_386_IRELATIVE:
336 TRACE ("BFD_RELOC_386_IRELATIVE");
337 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
339 case BFD_RELOC_386_GOT32X:
340 TRACE ("BFD_RELOC_386_GOT32X");
341 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
343 case BFD_RELOC_VTABLE_INHERIT:
344 TRACE ("BFD_RELOC_VTABLE_INHERIT");
345 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
347 case BFD_RELOC_VTABLE_ENTRY:
348 TRACE ("BFD_RELOC_VTABLE_ENTRY");
349 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
359 static reloc_howto_type *
360 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
365 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
366 if (elf_howto_table[i].name != NULL
367 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
368 return &elf_howto_table[i];
373 static reloc_howto_type *
374 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
378 if ((indx = r_type) >= R_386_standard
379 && ((indx = r_type - R_386_ext_offset) - R_386_standard
380 >= R_386_ext - R_386_standard)
381 && ((indx = r_type - R_386_tls_offset) - R_386_ext
382 >= R_386_ext2 - R_386_ext)
383 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
384 >= R_386_vt - R_386_ext2))
386 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
390 /* PR 17512: file: 0f67f69d. */
391 if (elf_howto_table [indx].type != r_type)
393 return &elf_howto_table[indx];
397 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
399 Elf_Internal_Rela *dst)
401 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
402 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
405 /* Return whether a symbol name implies a local label. The UnixWare
406 2.1 cc generates temporary symbols that start with .X, so we
407 recognize them here. FIXME: do other SVR4 compilers also use .X?.
408 If so, we should move the .X recognition into
409 _bfd_elf_is_local_label_name. */
412 elf_i386_is_local_label_name (bfd *abfd, const char *name)
414 if (name[0] == '.' && name[1] == 'X')
417 return _bfd_elf_is_local_label_name (abfd, name);
420 /* Support for core dump NOTE sections. */
423 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
428 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
430 int pr_version = bfd_get_32 (abfd, note->descdata);
436 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
439 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
443 size = bfd_get_32 (abfd, note->descdata + 8);
447 switch (note->descsz)
452 case 144: /* Linux/i386 */
454 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
457 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
467 /* Make a ".reg/999" section. */
468 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
469 size, note->descpos + offset);
473 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
475 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
477 int pr_version = bfd_get_32 (abfd, note->descdata);
482 elf_tdata (abfd)->core->program
483 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
484 elf_tdata (abfd)->core->command
485 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
489 switch (note->descsz)
494 case 124: /* Linux/i386 elf_prpsinfo. */
495 elf_tdata (abfd)->core->pid
496 = bfd_get_32 (abfd, note->descdata + 12);
497 elf_tdata (abfd)->core->program
498 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
499 elf_tdata (abfd)->core->command
500 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
504 /* Note that for some reason, a spurious space is tacked
505 onto the end of the args in some (at least one anyway)
506 implementations, so strip it off if it exists. */
508 char *command = elf_tdata (abfd)->core->command;
509 int n = strlen (command);
511 if (0 < n && command[n - 1] == ' ')
512 command[n - 1] = '\0';
518 /* Functions for the i386 ELF linker.
520 In order to gain some understanding of code in this file without
521 knowing all the intricate details of the linker, note the
524 Functions named elf_i386_* are called by external routines, other
525 functions are only called locally. elf_i386_* functions appear
526 in this file more or less in the order in which they are called
527 from external routines. eg. elf_i386_check_relocs is called
528 early in the link process, elf_i386_finish_dynamic_sections is
529 one of the last functions. */
532 /* The name of the dynamic interpreter. This is put in the .interp
535 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
537 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
538 copying dynamic variables from a shared lib into an app's dynbss
539 section, and instead use a dynamic relocation to point into the
541 #define ELIMINATE_COPY_RELOCS 1
543 /* The size in bytes of an entry in the procedure linkage table. */
545 #define PLT_ENTRY_SIZE 16
547 /* The first entry in an absolute procedure linkage table looks like
548 this. See the SVR4 ABI i386 supplement to see how this works.
549 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
551 static const bfd_byte elf_i386_plt0_entry[12] =
553 0xff, 0x35, /* pushl contents of address */
554 0, 0, 0, 0, /* replaced with address of .got + 4. */
555 0xff, 0x25, /* jmp indirect */
556 0, 0, 0, 0 /* replaced with address of .got + 8. */
559 /* Subsequent entries in an absolute procedure linkage table look like
562 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
564 0xff, 0x25, /* jmp indirect */
565 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
566 0x68, /* pushl immediate */
567 0, 0, 0, 0, /* replaced with offset into relocation table. */
568 0xe9, /* jmp relative */
569 0, 0, 0, 0 /* replaced with offset to start of .plt. */
572 /* The first entry in a PIC procedure linkage table look like this.
573 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
575 static const bfd_byte elf_i386_pic_plt0_entry[12] =
577 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
578 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
581 /* Subsequent entries in a PIC procedure linkage table look like this. */
583 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
585 0xff, 0xa3, /* jmp *offset(%ebx) */
586 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
587 0x68, /* pushl immediate */
588 0, 0, 0, 0, /* replaced with offset into relocation table. */
589 0xe9, /* jmp relative */
590 0, 0, 0, 0 /* replaced with offset to start of .plt. */
593 /* Entries in the GOT procedure linkage table look like this. */
595 static const bfd_byte elf_i386_got_plt_entry[8] =
597 0xff, 0x25, /* jmp indirect */
598 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
599 0x66, 0x90 /* xchg %ax,%ax */
602 /* Entries in the PIC GOT procedure linkage table look like this. */
604 static const bfd_byte elf_i386_pic_got_plt_entry[8] =
606 0xff, 0xa3, /* jmp *offset(%ebx) */
607 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
608 0x66, 0x90 /* xchg %ax,%ax */
611 /* .eh_frame covering the .plt section. */
613 static const bfd_byte elf_i386_eh_frame_plt[] =
615 #define PLT_CIE_LENGTH 20
616 #define PLT_FDE_LENGTH 36
617 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
618 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
619 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
620 0, 0, 0, 0, /* CIE ID */
622 'z', 'R', 0, /* Augmentation string */
623 1, /* Code alignment factor */
624 0x7c, /* Data alignment factor */
625 8, /* Return address column */
626 1, /* Augmentation size */
627 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
628 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
629 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
630 DW_CFA_nop, DW_CFA_nop,
632 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
633 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
634 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
635 0, 0, 0, 0, /* .plt size goes here */
636 0, /* Augmentation size */
637 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
638 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
639 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
640 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
641 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
642 11, /* Block length */
643 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
644 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
645 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
646 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
647 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
650 struct elf_i386_plt_layout
652 /* The first entry in an absolute procedure linkage table looks like this. */
653 const bfd_byte *plt0_entry;
654 unsigned int plt0_entry_size;
656 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
657 unsigned int plt0_got1_offset;
658 unsigned int plt0_got2_offset;
660 /* Later entries in an absolute procedure linkage table look like this. */
661 const bfd_byte *plt_entry;
662 unsigned int plt_entry_size;
664 /* Offsets into plt_entry that are to be replaced with... */
665 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
666 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
667 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
669 /* Offset into plt_entry where the initial value of the GOT entry points. */
670 unsigned int plt_lazy_offset;
672 /* The first entry in a PIC procedure linkage table looks like this. */
673 const bfd_byte *pic_plt0_entry;
675 /* Subsequent entries in a PIC procedure linkage table look like this. */
676 const bfd_byte *pic_plt_entry;
678 /* .eh_frame covering the .plt section. */
679 const bfd_byte *eh_frame_plt;
680 unsigned int eh_frame_plt_size;
683 #define GET_PLT_ENTRY_SIZE(abfd) \
684 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
686 /* These are the standard parameters. */
687 static const struct elf_i386_plt_layout elf_i386_plt =
689 elf_i386_plt0_entry, /* plt0_entry */
690 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
691 2, /* plt0_got1_offset */
692 8, /* plt0_got2_offset */
693 elf_i386_plt_entry, /* plt_entry */
694 PLT_ENTRY_SIZE, /* plt_entry_size */
695 2, /* plt_got_offset */
696 7, /* plt_reloc_offset */
697 12, /* plt_plt_offset */
698 6, /* plt_lazy_offset */
699 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
700 elf_i386_pic_plt_entry, /* pic_plt_entry */
701 elf_i386_eh_frame_plt, /* eh_frame_plt */
702 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
706 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
707 for the PLTResolve stub and then for each PLT entry. */
708 #define PLTRESOLVE_RELOCS_SHLIB 0
709 #define PLTRESOLVE_RELOCS 2
710 #define PLT_NON_JUMP_SLOT_RELOCS 2
712 /* Architecture-specific backend data for i386. */
714 struct elf_i386_backend_data
716 /* Parameters describing PLT generation. */
717 const struct elf_i386_plt_layout *plt;
719 /* Value used to fill the unused bytes of the first PLT entry. */
720 bfd_byte plt0_pad_byte;
722 /* True if the target system is VxWorks. */
726 #define get_elf_i386_backend_data(abfd) \
727 ((const struct elf_i386_backend_data *) \
728 get_elf_backend_data (abfd)->arch_data)
730 /* These are the standard parameters. */
731 static const struct elf_i386_backend_data elf_i386_arch_bed =
733 &elf_i386_plt, /* plt */
734 0, /* plt0_pad_byte */
738 #define elf_backend_arch_data &elf_i386_arch_bed
740 /* Is a undefined weak symbol which is resolved to 0. Reference to an
741 undefined weak symbol is resolved to 0 when building executable if
743 1. Has non-GOT/non-PLT relocations in text section. Or
744 2. Has no GOT/PLT relocation.
746 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
747 ((EH)->elf.root.type == bfd_link_hash_undefweak \
748 && bfd_link_executable (INFO) \
749 && (elf_i386_hash_table (INFO)->interp == NULL \
751 || (EH)->has_non_got_reloc \
752 || !(INFO)->dynamic_undefined_weak))
754 /* i386 ELF linker hash entry. */
756 struct elf_i386_link_hash_entry
758 struct elf_link_hash_entry elf;
760 /* Track dynamic relocs copied for this symbol. */
761 struct elf_dyn_relocs *dyn_relocs;
763 #define GOT_UNKNOWN 0
767 #define GOT_TLS_IE_POS 5
768 #define GOT_TLS_IE_NEG 6
769 #define GOT_TLS_IE_BOTH 7
770 #define GOT_TLS_GDESC 8
771 #define GOT_TLS_GD_BOTH_P(type) \
772 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
773 #define GOT_TLS_GD_P(type) \
774 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
775 #define GOT_TLS_GDESC_P(type) \
776 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
777 #define GOT_TLS_GD_ANY_P(type) \
778 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
779 unsigned char tls_type;
781 /* Symbol is referenced by R_386_GOTOFF relocation. */
782 unsigned int gotoff_ref : 1;
784 /* Symbol has GOT or PLT relocations. */
785 unsigned int has_got_reloc : 1;
787 /* Symbol has non-GOT/non-PLT relocations in text sections. */
788 unsigned int has_non_got_reloc : 1;
790 /* 0: symbol isn't ___tls_get_addr.
791 1: symbol is ___tls_get_addr.
792 2: symbol is unknown. */
793 unsigned int tls_get_addr : 2;
795 /* Reference count of C/C++ function pointer relocations in read-write
796 section which can be resolved at run-time. */
797 bfd_signed_vma func_pointer_refcount;
799 /* Information about the GOT PLT entry. Filled when there are both
800 GOT and PLT relocations against the same function. */
801 union gotplt_union plt_got;
803 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
804 starting at the end of the jump table. */
808 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
810 struct elf_i386_obj_tdata
812 struct elf_obj_tdata root;
814 /* tls_type for each local got entry. */
815 char *local_got_tls_type;
817 /* GOTPLT entries for TLS descriptors. */
818 bfd_vma *local_tlsdesc_gotent;
821 #define elf_i386_tdata(abfd) \
822 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
824 #define elf_i386_local_got_tls_type(abfd) \
825 (elf_i386_tdata (abfd)->local_got_tls_type)
827 #define elf_i386_local_tlsdesc_gotent(abfd) \
828 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
830 #define is_i386_elf(bfd) \
831 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
832 && elf_tdata (bfd) != NULL \
833 && elf_object_id (bfd) == I386_ELF_DATA)
836 elf_i386_mkobject (bfd *abfd)
838 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
842 /* i386 ELF linker hash table. */
844 struct elf_i386_link_hash_table
846 struct elf_link_hash_table elf;
848 /* Short-cuts to get to dynamic linker sections. */
852 asection *plt_eh_frame;
857 bfd_signed_vma refcount;
861 /* The amount of space used by the reserved portion of the sgotplt
862 section, plus whatever space is used by the jump slots. */
863 bfd_vma sgotplt_jump_table_size;
865 /* Small local sym cache. */
866 struct sym_cache sym_cache;
868 /* _TLS_MODULE_BASE_ symbol. */
869 struct bfd_link_hash_entry *tls_module_base;
871 /* Used by local STT_GNU_IFUNC symbols. */
872 htab_t loc_hash_table;
873 void * loc_hash_memory;
875 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
878 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
879 bfd_vma next_tls_desc_index;
881 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
882 bfd_vma next_jump_slot_index;
884 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
885 bfd_vma next_irelative_index;
887 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
888 to read-only sections. */
889 bfd_boolean readonly_dynrelocs_against_ifunc;
892 /* Get the i386 ELF linker hash table from a link_info structure. */
894 #define elf_i386_hash_table(p) \
895 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
896 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
898 #define elf_i386_compute_jump_table_size(htab) \
899 ((htab)->elf.srelplt->reloc_count * 4)
901 /* Create an entry in an i386 ELF linker hash table. */
903 static struct bfd_hash_entry *
904 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
905 struct bfd_hash_table *table,
908 /* Allocate the structure if it has not already been allocated by a
912 entry = (struct bfd_hash_entry *)
913 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
918 /* Call the allocation method of the superclass. */
919 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
922 struct elf_i386_link_hash_entry *eh;
924 eh = (struct elf_i386_link_hash_entry *) entry;
925 eh->dyn_relocs = NULL;
926 eh->tls_type = GOT_UNKNOWN;
928 eh->has_got_reloc = 0;
929 eh->has_non_got_reloc = 0;
930 eh->tls_get_addr = 2;
931 eh->func_pointer_refcount = 0;
932 eh->plt_got.offset = (bfd_vma) -1;
933 eh->tlsdesc_got = (bfd_vma) -1;
939 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
940 for local symbol so that we can handle local STT_GNU_IFUNC symbols
941 as global symbol. We reuse indx and dynstr_index for local symbol
942 hash since they aren't used by global symbols in this backend. */
945 elf_i386_local_htab_hash (const void *ptr)
947 struct elf_link_hash_entry *h
948 = (struct elf_link_hash_entry *) ptr;
949 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
952 /* Compare local hash entries. */
955 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
957 struct elf_link_hash_entry *h1
958 = (struct elf_link_hash_entry *) ptr1;
959 struct elf_link_hash_entry *h2
960 = (struct elf_link_hash_entry *) ptr2;
962 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
965 /* Find and/or create a hash entry for local symbol. */
967 static struct elf_link_hash_entry *
968 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
969 bfd *abfd, const Elf_Internal_Rela *rel,
972 struct elf_i386_link_hash_entry e, *ret;
973 asection *sec = abfd->sections;
974 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
975 ELF32_R_SYM (rel->r_info));
978 e.elf.indx = sec->id;
979 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
980 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
981 create ? INSERT : NO_INSERT);
988 ret = (struct elf_i386_link_hash_entry *) *slot;
992 ret = (struct elf_i386_link_hash_entry *)
993 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
994 sizeof (struct elf_i386_link_hash_entry));
997 memset (ret, 0, sizeof (*ret));
998 ret->elf.indx = sec->id;
999 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
1000 ret->elf.dynindx = -1;
1001 ret->func_pointer_refcount = 0;
1002 ret->plt_got.offset = (bfd_vma) -1;
1008 /* Destroy an i386 ELF linker hash table. */
1011 elf_i386_link_hash_table_free (bfd *obfd)
1013 struct elf_i386_link_hash_table *htab
1014 = (struct elf_i386_link_hash_table *) obfd->link.hash;
1016 if (htab->loc_hash_table)
1017 htab_delete (htab->loc_hash_table);
1018 if (htab->loc_hash_memory)
1019 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1020 _bfd_elf_link_hash_table_free (obfd);
1023 /* Create an i386 ELF linker hash table. */
1025 static struct bfd_link_hash_table *
1026 elf_i386_link_hash_table_create (bfd *abfd)
1028 struct elf_i386_link_hash_table *ret;
1029 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
1031 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
1035 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1036 elf_i386_link_hash_newfunc,
1037 sizeof (struct elf_i386_link_hash_entry),
1044 ret->loc_hash_table = htab_try_create (1024,
1045 elf_i386_local_htab_hash,
1046 elf_i386_local_htab_eq,
1048 ret->loc_hash_memory = objalloc_create ();
1049 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1051 elf_i386_link_hash_table_free (abfd);
1054 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1056 return &ret->elf.root;
1059 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1060 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1064 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1066 struct elf_i386_link_hash_table *htab;
1068 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1071 htab = elf_i386_hash_table (info);
1075 /* Set the contents of the .interp section to the interpreter. */
1076 if (bfd_link_executable (info) && !info->nointerp)
1078 asection *s = bfd_get_linker_section (dynobj, ".interp");
1081 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1082 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1086 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1090 if (bfd_link_executable (info))
1092 /* Always allow copy relocs for building executables. */
1093 asection *s = bfd_get_linker_section (dynobj, ".rel.bss");
1096 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1097 s = bfd_make_section_anyway_with_flags (dynobj,
1099 (bed->dynamic_sec_flags
1102 || ! bfd_set_section_alignment (dynobj, s,
1103 bed->s->log_file_align))
1109 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1110 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1114 if (!info->no_ld_generated_unwind_info
1115 && htab->plt_eh_frame == NULL
1116 && htab->elf.splt != NULL)
1118 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1119 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1120 | SEC_LINKER_CREATED);
1122 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1123 if (htab->plt_eh_frame == NULL
1124 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1131 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1134 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1135 struct elf_link_hash_entry *dir,
1136 struct elf_link_hash_entry *ind)
1138 struct elf_i386_link_hash_entry *edir, *eind;
1140 edir = (struct elf_i386_link_hash_entry *) dir;
1141 eind = (struct elf_i386_link_hash_entry *) ind;
1143 if (eind->dyn_relocs != NULL)
1145 if (edir->dyn_relocs != NULL)
1147 struct elf_dyn_relocs **pp;
1148 struct elf_dyn_relocs *p;
1150 /* Add reloc counts against the indirect sym to the direct sym
1151 list. Merge any entries against the same section. */
1152 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1154 struct elf_dyn_relocs *q;
1156 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1157 if (q->sec == p->sec)
1159 q->pc_count += p->pc_count;
1160 q->count += p->count;
1167 *pp = edir->dyn_relocs;
1170 edir->dyn_relocs = eind->dyn_relocs;
1171 eind->dyn_relocs = NULL;
1174 if (ind->root.type == bfd_link_hash_indirect
1175 && dir->got.refcount <= 0)
1177 edir->tls_type = eind->tls_type;
1178 eind->tls_type = GOT_UNKNOWN;
1181 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1182 generate a R_386_COPY reloc. */
1183 edir->gotoff_ref |= eind->gotoff_ref;
1185 edir->has_got_reloc |= eind->has_got_reloc;
1186 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1188 if (ELIMINATE_COPY_RELOCS
1189 && ind->root.type != bfd_link_hash_indirect
1190 && dir->dynamic_adjusted)
1192 /* If called to transfer flags for a weakdef during processing
1193 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1194 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1195 dir->ref_dynamic |= ind->ref_dynamic;
1196 dir->ref_regular |= ind->ref_regular;
1197 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1198 dir->needs_plt |= ind->needs_plt;
1199 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1203 if (eind->func_pointer_refcount > 0)
1205 edir->func_pointer_refcount += eind->func_pointer_refcount;
1206 eind->func_pointer_refcount = 0;
1209 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1213 /* Return TRUE if the TLS access code sequence support transition
1217 elf_i386_check_tls_transition (asection *sec,
1219 Elf_Internal_Shdr *symtab_hdr,
1220 struct elf_link_hash_entry **sym_hashes,
1221 unsigned int r_type,
1222 const Elf_Internal_Rela *rel,
1223 const Elf_Internal_Rela *relend)
1225 unsigned int val, type, reg;
1226 unsigned long r_symndx;
1227 struct elf_link_hash_entry *h;
1230 bfd_boolean indirect_call, tls_get_addr;
1232 offset = rel->r_offset;
1237 if (offset < 2 || (rel + 1) >= relend)
1240 indirect_call = FALSE;
1241 call = contents + offset + 4;
1244 if (r_type == R_386_TLS_GD)
1246 /* Check transition from GD access model. Only
1247 leal foo@tlsgd(,%ebx,1), %eax
1248 call ___tls_get_addr@PLT
1250 leal foo@tlsgd(%ebx) %eax
1251 call ___tls_get_addr@PLT
1254 leal foo@tlsgd(%reg), %eax
1255 call *___tls_get_addr@GOT(%reg)
1256 which may be converted to
1257 addr32 call ___tls_get_addr
1258 can transit to different access model. */
1259 if ((offset + 10) > sec->size
1260 || (type != 0x8d && type != 0x04))
1265 /* leal foo@tlsgd(,%ebx,1), %eax
1266 call ___tls_get_addr@PLT */
1270 if (*(call - 7) != 0x8d
1278 leal foo@tlsgd(%ebx), %eax
1279 call ___tls_get_addr@PLT
1282 leal foo@tlsgd(%reg), %eax
1283 call *___tls_get_addr@GOT(%reg)
1284 which may be converted to
1285 addr32 call ___tls_get_addr
1287 %eax can't be used as the GOT base register since it
1288 is used to pass parameter to ___tls_get_addr. */
1290 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
1293 indirect_call = call[0] == 0xff;
1294 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
1295 && !(call[0] == 0x67 && call[1] == 0xe8)
1297 && (call[1] & 0xf8) == 0x90
1298 && (call[1] & 0x7) == reg))
1304 /* Check transition from LD access model. Only
1305 leal foo@tlsldm(%ebx), %eax
1306 call ___tls_get_addr@PLT
1308 leal foo@tlsldm(%reg), %eax
1309 call *___tls_get_addr@GOT(%reg)
1310 which may be converted to
1311 addr32 call ___tls_get_addr
1312 can transit to different access model. */
1313 if (type != 0x8d || (offset + 9) > sec->size)
1316 /* %eax can't be used as the GOT base register since it is
1317 used to pass parameter to ___tls_get_addr. */
1319 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
1322 indirect_call = call[0] == 0xff;
1323 if (!(reg == 3 && call[0] == 0xe8)
1324 && !(call[0] == 0x67 && call[1] == 0xe8)
1326 && (call[1] & 0xf8) == 0x90
1327 && (call[1] & 0x7) == reg))
1331 r_symndx = ELF32_R_SYM (rel[1].r_info);
1332 if (r_symndx < symtab_hdr->sh_info)
1335 tls_get_addr = FALSE;
1336 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1337 if (h != NULL && h->root.root.string != NULL)
1339 struct elf_i386_link_hash_entry *eh
1340 = (struct elf_i386_link_hash_entry *) h;
1341 tls_get_addr = eh->tls_get_addr == 1;
1342 if (eh->tls_get_addr > 1)
1344 /* Use strncmp to check ___tls_get_addr since
1345 ___tls_get_addr may be versioned. */
1346 if (strncmp (h->root.root.string, "___tls_get_addr", 15)
1349 eh->tls_get_addr = 1;
1350 tls_get_addr = TRUE;
1353 eh->tls_get_addr = 0;
1359 else if (indirect_call)
1360 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
1362 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1363 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
1366 /* Check transition from IE access model:
1367 movl foo@indntpoff(%rip), %eax
1368 movl foo@indntpoff(%rip), %reg
1369 addl foo@indntpoff(%rip), %reg
1372 if (offset < 1 || (offset + 4) > sec->size)
1375 /* Check "movl foo@tpoff(%rip), %eax" first. */
1376 val = bfd_get_8 (abfd, contents + offset - 1);
1383 /* Check movl|addl foo@tpoff(%rip), %reg. */
1384 type = bfd_get_8 (abfd, contents + offset - 2);
1385 return ((type == 0x8b || type == 0x03)
1386 && (val & 0xc7) == 0x05);
1388 case R_386_TLS_GOTIE:
1389 case R_386_TLS_IE_32:
1390 /* Check transition from {IE_32,GOTIE} access model:
1391 subl foo@{tpoff,gontoff}(%reg1), %reg2
1392 movl foo@{tpoff,gontoff}(%reg1), %reg2
1393 addl foo@{tpoff,gontoff}(%reg1), %reg2
1396 if (offset < 2 || (offset + 4) > sec->size)
1399 val = bfd_get_8 (abfd, contents + offset - 1);
1400 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1403 type = bfd_get_8 (abfd, contents + offset - 2);
1404 return type == 0x8b || type == 0x2b || type == 0x03;
1406 case R_386_TLS_GOTDESC:
1407 /* Check transition from GDesc access model:
1408 leal x@tlsdesc(%ebx), %eax
1410 Make sure it's a leal adding ebx to a 32-bit offset
1411 into any register, although it's probably almost always
1414 if (offset < 2 || (offset + 4) > sec->size)
1417 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1420 val = bfd_get_8 (abfd, contents + offset - 1);
1421 return (val & 0xc7) == 0x83;
1423 case R_386_TLS_DESC_CALL:
1424 /* Check transition from GDesc access model:
1425 call *x@tlsdesc(%eax)
1427 if (offset + 2 <= sec->size)
1429 /* Make sure that it's a call *x@tlsdesc(%eax). */
1430 call = contents + offset;
1431 return call[0] == 0xff && call[1] == 0x10;
1441 /* Return TRUE if the TLS access transition is OK or no transition
1442 will be performed. Update R_TYPE if there is a transition. */
1445 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1446 asection *sec, bfd_byte *contents,
1447 Elf_Internal_Shdr *symtab_hdr,
1448 struct elf_link_hash_entry **sym_hashes,
1449 unsigned int *r_type, int tls_type,
1450 const Elf_Internal_Rela *rel,
1451 const Elf_Internal_Rela *relend,
1452 struct elf_link_hash_entry *h,
1453 unsigned long r_symndx,
1454 bfd_boolean from_relocate_section)
1456 unsigned int from_type = *r_type;
1457 unsigned int to_type = from_type;
1458 bfd_boolean check = TRUE;
1460 /* Skip TLS transition for functions. */
1462 && (h->type == STT_FUNC
1463 || h->type == STT_GNU_IFUNC))
1469 case R_386_TLS_GOTDESC:
1470 case R_386_TLS_DESC_CALL:
1471 case R_386_TLS_IE_32:
1473 case R_386_TLS_GOTIE:
1474 if (bfd_link_executable (info))
1477 to_type = R_386_TLS_LE_32;
1478 else if (from_type != R_386_TLS_IE
1479 && from_type != R_386_TLS_GOTIE)
1480 to_type = R_386_TLS_IE_32;
1483 /* When we are called from elf_i386_relocate_section, there may
1484 be additional transitions based on TLS_TYPE. */
1485 if (from_relocate_section)
1487 unsigned int new_to_type = to_type;
1489 if (bfd_link_executable (info)
1492 && (tls_type & GOT_TLS_IE))
1493 new_to_type = R_386_TLS_LE_32;
1495 if (to_type == R_386_TLS_GD
1496 || to_type == R_386_TLS_GOTDESC
1497 || to_type == R_386_TLS_DESC_CALL)
1499 if (tls_type == GOT_TLS_IE_POS)
1500 new_to_type = R_386_TLS_GOTIE;
1501 else if (tls_type & GOT_TLS_IE)
1502 new_to_type = R_386_TLS_IE_32;
1505 /* We checked the transition before when we were called from
1506 elf_i386_check_relocs. We only want to check the new
1507 transition which hasn't been checked before. */
1508 check = new_to_type != to_type && from_type == to_type;
1509 to_type = new_to_type;
1515 if (bfd_link_executable (info))
1516 to_type = R_386_TLS_LE_32;
1523 /* Return TRUE if there is no transition. */
1524 if (from_type == to_type)
1527 /* Check if the transition can be performed. */
1529 && ! elf_i386_check_tls_transition (sec, contents,
1530 symtab_hdr, sym_hashes,
1531 from_type, rel, relend))
1533 reloc_howto_type *from, *to;
1536 from = elf_i386_rtype_to_howto (abfd, from_type);
1537 to = elf_i386_rtype_to_howto (abfd, to_type);
1540 name = h->root.root.string;
1543 struct elf_i386_link_hash_table *htab;
1545 htab = elf_i386_hash_table (info);
1550 Elf_Internal_Sym *isym;
1552 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1554 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1558 (*_bfd_error_handler)
1559 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1560 "in section `%A' failed"),
1561 abfd, sec, from->name, to->name, name,
1562 (unsigned long) rel->r_offset);
1563 bfd_set_error (bfd_error_bad_value);
1571 /* With the local symbol, foo, we convert
1572 mov foo@GOT[(%reg1)], %reg2
1574 lea foo[@GOTOFF(%reg1)], %reg2
1576 call/jmp *foo@GOT[(%reg)]
1578 nop call foo/jmp foo nop
1579 When PIC is false, convert
1580 test %reg1, foo@GOT[(%reg2)]
1584 binop foo@GOT[(%reg1)], %reg2
1587 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1592 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1594 Elf_Internal_Rela *irel,
1595 struct elf_link_hash_entry *h,
1596 bfd_boolean *converted,
1597 struct bfd_link_info *link_info)
1599 struct elf_i386_link_hash_table *htab;
1600 unsigned int opcode;
1602 bfd_boolean baseless;
1603 Elf_Internal_Sym *isym;
1604 unsigned int addend;
1608 bfd_boolean to_reloc_32;
1609 unsigned int r_type;
1610 unsigned int r_symndx;
1611 bfd_vma roff = irel->r_offset;
1616 /* Addend for R_386_GOT32X relocations must be 0. */
1617 addend = bfd_get_32 (abfd, contents + roff);
1621 htab = elf_i386_hash_table (link_info);
1622 is_pic = bfd_link_pic (link_info);
1624 r_type = ELF32_R_TYPE (irel->r_info);
1625 r_symndx = ELF32_R_SYM (irel->r_info);
1627 modrm = bfd_get_8 (abfd, contents + roff - 1);
1628 baseless = (modrm & 0xc7) == 0x5;
1630 if (baseless && is_pic)
1632 /* For PIC, disallow R_386_GOT32X without a base register
1633 since we don't know what the GOT base is. */
1638 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1640 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1643 name = h->root.root.string;
1645 (*_bfd_error_handler)
1646 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"),
1651 opcode = bfd_get_8 (abfd, contents + roff - 2);
1653 /* Convert to R_386_32 if PIC is false or there is no base
1655 to_reloc_32 = !is_pic || baseless;
1657 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1661 if (opcode == 0x0ff)
1662 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1663 goto convert_branch;
1665 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1666 "test %reg1, foo@GOT(%reg2)" and
1667 "binop foo@GOT[(%reg1)], %reg2". */
1671 /* Undefined weak symbol is only bound locally in executable
1672 and its reference is resolved as 0. */
1673 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE,
1674 elf_i386_hash_entry (h)))
1678 /* No direct branch to 0 for PIC. */
1682 goto convert_branch;
1686 /* We can convert load of address 0 to R_386_32. */
1694 /* We have "call/jmp *foo@GOT[(%reg)]". */
1695 if ((h->root.type == bfd_link_hash_defined
1696 || h->root.type == bfd_link_hash_defweak)
1697 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1699 /* The function is locally defined. */
1701 /* Convert R_386_GOT32X to R_386_PC32. */
1702 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1704 struct elf_i386_link_hash_entry *eh
1705 = (struct elf_i386_link_hash_entry *) h;
1707 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1710 /* To support TLS optimization, always use addr32 prefix
1711 for "call *___tls_get_addr@GOT(%reg)". */
1712 if (eh && eh->tls_get_addr == 1)
1715 nop_offset = irel->r_offset - 2;
1719 nop = link_info->call_nop_byte;
1720 if (link_info->call_nop_as_suffix)
1722 nop_offset = roff + 3;
1723 irel->r_offset -= 1;
1726 nop_offset = roff - 2;
1731 /* Convert to "jmp foo nop". */
1734 nop_offset = roff + 3;
1735 irel->r_offset -= 1;
1738 bfd_put_8 (abfd, nop, contents + nop_offset);
1739 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1740 /* When converting to PC-relative relocation, we
1741 need to adjust addend by -4. */
1742 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1743 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1750 /* We have "mov foo@GOT[(%re1g)], %reg2",
1751 "test %reg1, foo@GOT(%reg2)" and
1752 "binop foo@GOT[(%reg1)], %reg2".
1754 Avoid optimizing _DYNAMIC since ld.so may use its
1755 link-time address. */
1756 if (h == htab->elf.hdynamic)
1759 /* def_regular is set by an assignment in a linker script in
1760 bfd_elf_record_link_assignment. */
1762 || h->root.type == bfd_link_hash_defined
1763 || h->root.type == bfd_link_hash_defweak)
1764 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1771 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1772 "mov $foo, %reg2" with R_386_32. */
1774 modrm = 0xc0 | (modrm & 0x38) >> 3;
1775 bfd_put_8 (abfd, modrm, contents + roff - 1);
1780 /* Convert "mov foo@GOT(%reg1), %reg2" to
1781 "lea foo@GOTOFF(%reg1), %reg2". */
1782 r_type = R_386_GOTOFF;
1788 /* Only R_386_32 is supported. */
1794 /* Convert "test %reg1, foo@GOT(%reg2)" to
1795 "test $foo, %reg1". */
1796 modrm = 0xc0 | (modrm & 0x38) >> 3;
1801 /* Convert "binop foo@GOT(%reg1), %reg2" to
1802 "binop $foo, %reg2". */
1804 | (modrm & 0x38) >> 3
1808 bfd_put_8 (abfd, modrm, contents + roff - 1);
1812 bfd_put_8 (abfd, opcode, contents + roff - 2);
1813 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1822 /* Rename some of the generic section flags to better document how they
1824 #define need_convert_load sec_flg0
1825 #define check_relocs_failed sec_flg1
1827 /* Look through the relocs for a section during the first phase, and
1828 calculate needed space in the global offset table, procedure linkage
1829 table, and dynamic reloc sections. */
1832 elf_i386_check_relocs (bfd *abfd,
1833 struct bfd_link_info *info,
1835 const Elf_Internal_Rela *relocs)
1837 struct elf_i386_link_hash_table *htab;
1838 Elf_Internal_Shdr *symtab_hdr;
1839 struct elf_link_hash_entry **sym_hashes;
1840 const Elf_Internal_Rela *rel;
1841 const Elf_Internal_Rela *rel_end;
1844 bfd_boolean use_plt_got;
1846 if (bfd_link_relocatable (info))
1849 BFD_ASSERT (is_i386_elf (abfd));
1851 htab = elf_i386_hash_table (info);
1854 sec->check_relocs_failed = 1;
1858 /* Get the section contents. */
1859 if (elf_section_data (sec)->this_hdr.contents != NULL)
1860 contents = elf_section_data (sec)->this_hdr.contents;
1861 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1863 sec->check_relocs_failed = 1;
1867 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1868 && (get_elf_i386_backend_data (abfd)
1869 == &elf_i386_arch_bed));
1871 symtab_hdr = &elf_symtab_hdr (abfd);
1872 sym_hashes = elf_sym_hashes (abfd);
1876 rel_end = relocs + sec->reloc_count;
1877 for (rel = relocs; rel < rel_end; rel++)
1879 unsigned int r_type;
1880 unsigned long r_symndx;
1881 struct elf_link_hash_entry *h;
1882 struct elf_i386_link_hash_entry *eh;
1883 Elf_Internal_Sym *isym;
1885 bfd_boolean size_reloc;
1887 r_symndx = ELF32_R_SYM (rel->r_info);
1888 r_type = ELF32_R_TYPE (rel->r_info);
1890 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1892 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1898 if (r_symndx < symtab_hdr->sh_info)
1900 /* A local symbol. */
1901 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1906 /* Check relocation against local STT_GNU_IFUNC symbol. */
1907 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1909 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1913 /* Fake a STT_GNU_IFUNC symbol. */
1914 h->type = STT_GNU_IFUNC;
1917 h->forced_local = 1;
1918 h->root.type = bfd_link_hash_defined;
1926 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1927 while (h->root.type == bfd_link_hash_indirect
1928 || h->root.type == bfd_link_hash_warning)
1929 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1932 eh = (struct elf_i386_link_hash_entry *) h;
1947 if (htab->elf.dynobj == NULL)
1948 htab->elf.dynobj = abfd;
1949 /* Create the ifunc sections for static executables. */
1950 if (h->type == STT_GNU_IFUNC
1951 && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj,
1957 /* It is referenced by a non-shared object. */
1959 h->root.non_ir_ref = 1;
1961 if (h->type == STT_GNU_IFUNC)
1962 elf_tdata (info->output_bfd)->has_gnu_symbols
1963 |= elf_gnu_symbol_ifunc;
1966 if (! elf_i386_tls_transition (info, abfd, sec, contents,
1967 symtab_hdr, sym_hashes,
1968 &r_type, GOT_UNKNOWN,
1969 rel, rel_end, h, r_symndx, FALSE))
1975 htab->tls_ldm_got.refcount += 1;
1979 /* This symbol requires a procedure linkage table entry. We
1980 actually build the entry in adjust_dynamic_symbol,
1981 because this might be a case of linking PIC code which is
1982 never referenced by a dynamic object, in which case we
1983 don't need to generate a procedure linkage table entry
1986 /* If this is a local symbol, we resolve it directly without
1987 creating a procedure linkage table entry. */
1991 eh->has_got_reloc = 1;
1993 h->plt.refcount += 1;
2000 case R_386_TLS_IE_32:
2002 case R_386_TLS_GOTIE:
2003 if (!bfd_link_executable (info))
2004 info->flags |= DF_STATIC_TLS;
2010 case R_386_TLS_GOTDESC:
2011 case R_386_TLS_DESC_CALL:
2012 /* This symbol requires a global offset table entry. */
2014 int tls_type, old_tls_type;
2021 tls_type = GOT_NORMAL;
2023 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
2024 case R_386_TLS_GOTDESC:
2025 case R_386_TLS_DESC_CALL:
2026 tls_type = GOT_TLS_GDESC; break;
2027 case R_386_TLS_IE_32:
2028 if (ELF32_R_TYPE (rel->r_info) == r_type)
2029 tls_type = GOT_TLS_IE_NEG;
2031 /* If this is a GD->IE transition, we may use either of
2032 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
2033 tls_type = GOT_TLS_IE;
2036 case R_386_TLS_GOTIE:
2037 tls_type = GOT_TLS_IE_POS; break;
2042 h->got.refcount += 1;
2043 old_tls_type = elf_i386_hash_entry(h)->tls_type;
2047 bfd_signed_vma *local_got_refcounts;
2049 /* This is a global offset table entry for a local symbol. */
2050 local_got_refcounts = elf_local_got_refcounts (abfd);
2051 if (local_got_refcounts == NULL)
2055 size = symtab_hdr->sh_info;
2056 size *= (sizeof (bfd_signed_vma)
2057 + sizeof (bfd_vma) + sizeof(char));
2058 local_got_refcounts = (bfd_signed_vma *)
2059 bfd_zalloc (abfd, size);
2060 if (local_got_refcounts == NULL)
2062 elf_local_got_refcounts (abfd) = local_got_refcounts;
2063 elf_i386_local_tlsdesc_gotent (abfd)
2064 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2065 elf_i386_local_got_tls_type (abfd)
2066 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2068 local_got_refcounts[r_symndx] += 1;
2069 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
2072 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
2073 tls_type |= old_tls_type;
2074 /* If a TLS symbol is accessed using IE at least once,
2075 there is no point to use dynamic model for it. */
2076 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2077 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2078 || (tls_type & GOT_TLS_IE) == 0))
2080 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
2081 tls_type = old_tls_type;
2082 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2083 && GOT_TLS_GD_ANY_P (tls_type))
2084 tls_type |= old_tls_type;
2088 name = h->root.root.string;
2090 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
2092 (*_bfd_error_handler)
2093 (_("%B: `%s' accessed both as normal and "
2094 "thread local symbol"),
2096 bfd_set_error (bfd_error_bad_value);
2101 if (old_tls_type != tls_type)
2104 elf_i386_hash_entry (h)->tls_type = tls_type;
2106 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
2114 if (htab->elf.sgot == NULL)
2116 if (htab->elf.dynobj == NULL)
2117 htab->elf.dynobj = abfd;
2118 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
2121 if (r_type != R_386_TLS_IE)
2124 eh->has_got_reloc = 1;
2129 case R_386_TLS_LE_32:
2132 eh->has_got_reloc = 1;
2133 if (bfd_link_executable (info))
2135 info->flags |= DF_STATIC_TLS;
2140 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2141 eh->has_non_got_reloc = 1;
2143 /* STT_GNU_IFUNC symbol must go through PLT even if it is
2144 locally defined and undefined symbol may turn out to be
2145 a STT_GNU_IFUNC symbol later. */
2147 && (bfd_link_executable (info)
2148 || ((h->type == STT_GNU_IFUNC
2149 || h->root.type == bfd_link_hash_undefweak
2150 || h->root.type == bfd_link_hash_undefined)
2151 && SYMBOLIC_BIND (info, h))))
2153 /* If this reloc is in a read-only section, we might
2154 need a copy reloc. We can't check reliably at this
2155 stage whether the section is read-only, as input
2156 sections have not yet been mapped to output sections.
2157 Tentatively set the flag for now, and correct in
2158 adjust_dynamic_symbol. */
2161 /* We may need a .plt entry if the function this reloc
2162 refers to is in a shared lib. */
2163 h->plt.refcount += 1;
2164 if (r_type == R_386_PC32)
2166 /* Since something like ".long foo - ." may be used
2167 as pointer, make sure that PLT is used if foo is
2168 a function defined in a shared library. */
2169 if ((sec->flags & SEC_CODE) == 0)
2170 h->pointer_equality_needed = 1;
2174 h->pointer_equality_needed = 1;
2175 /* R_386_32 can be resolved at run-time. */
2176 if (r_type == R_386_32
2177 && (sec->flags & SEC_READONLY) == 0)
2178 eh->func_pointer_refcount += 1;
2184 /* If we are creating a shared library, and this is a reloc
2185 against a global symbol, or a non PC relative reloc
2186 against a local symbol, then we need to copy the reloc
2187 into the shared library. However, if we are linking with
2188 -Bsymbolic, we do not need to copy a reloc against a
2189 global symbol which is defined in an object we are
2190 including in the link (i.e., DEF_REGULAR is set). At
2191 this point we have not seen all the input files, so it is
2192 possible that DEF_REGULAR is not set now but will be set
2193 later (it is never cleared). In case of a weak definition,
2194 DEF_REGULAR may be cleared later by a strong definition in
2195 a shared library. We account for that possibility below by
2196 storing information in the relocs_copied field of the hash
2197 table entry. A similar situation occurs when creating
2198 shared libraries and symbol visibility changes render the
2201 If on the other hand, we are creating an executable, we
2202 may need to keep relocations for symbols satisfied by a
2203 dynamic library if we manage to avoid copy relocs for the
2205 if ((bfd_link_pic (info)
2206 && (sec->flags & SEC_ALLOC) != 0
2207 && (r_type != R_386_PC32
2209 && (! (bfd_link_pie (info)
2210 || SYMBOLIC_BIND (info, h))
2211 || h->root.type == bfd_link_hash_defweak
2212 || !h->def_regular))))
2213 || (ELIMINATE_COPY_RELOCS
2214 && !bfd_link_pic (info)
2215 && (sec->flags & SEC_ALLOC) != 0
2217 && (h->root.type == bfd_link_hash_defweak
2218 || !h->def_regular)))
2220 struct elf_dyn_relocs *p;
2221 struct elf_dyn_relocs **head;
2223 /* We must copy these reloc types into the output file.
2224 Create a reloc section in dynobj and make room for
2228 if (htab->elf.dynobj == NULL)
2229 htab->elf.dynobj = abfd;
2231 sreloc = _bfd_elf_make_dynamic_reloc_section
2232 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
2238 /* If this is a global symbol, we count the number of
2239 relocations we need for this symbol. */
2242 head = &eh->dyn_relocs;
2246 /* Track dynamic relocs needed for local syms too.
2247 We really need local syms available to do this
2252 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2257 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2261 vpp = &elf_section_data (s)->local_dynrel;
2262 head = (struct elf_dyn_relocs **)vpp;
2266 if (p == NULL || p->sec != sec)
2268 bfd_size_type amt = sizeof *p;
2269 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
2281 /* Count size relocation as PC-relative relocation. */
2282 if (r_type == R_386_PC32 || size_reloc)
2287 /* This relocation describes the C++ object vtable hierarchy.
2288 Reconstruct it for later use during GC. */
2289 case R_386_GNU_VTINHERIT:
2290 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2294 /* This relocation describes which C++ vtable entries are actually
2295 used. Record for later use during GC. */
2296 case R_386_GNU_VTENTRY:
2297 BFD_ASSERT (h != NULL);
2299 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
2309 && h->plt.refcount > 0
2310 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2311 || h->got.refcount > 0)
2312 && htab->plt_got == NULL)
2314 /* Create the GOT procedure linkage table. */
2315 unsigned int plt_got_align;
2316 const struct elf_backend_data *bed;
2318 bed = get_elf_backend_data (info->output_bfd);
2319 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
2320 && (sizeof (elf_i386_got_plt_entry)
2321 == sizeof (elf_i386_pic_got_plt_entry)));
2324 if (htab->elf.dynobj == NULL)
2325 htab->elf.dynobj = abfd;
2327 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2329 (bed->dynamic_sec_flags
2334 if (htab->plt_got == NULL
2335 || !bfd_set_section_alignment (htab->elf.dynobj,
2341 if (r_type == R_386_GOT32X
2342 && (h == NULL || h->type != STT_GNU_IFUNC))
2343 sec->need_convert_load = 1;
2346 if (elf_section_data (sec)->this_hdr.contents != contents)
2348 if (!info->keep_memory)
2352 /* Cache the section contents for elf_link_input_bfd. */
2353 elf_section_data (sec)->this_hdr.contents = contents;
2360 if (elf_section_data (sec)->this_hdr.contents != contents)
2362 sec->check_relocs_failed = 1;
2366 /* Return the section that should be marked against GC for a given
2370 elf_i386_gc_mark_hook (asection *sec,
2371 struct bfd_link_info *info,
2372 Elf_Internal_Rela *rel,
2373 struct elf_link_hash_entry *h,
2374 Elf_Internal_Sym *sym)
2377 switch (ELF32_R_TYPE (rel->r_info))
2379 case R_386_GNU_VTINHERIT:
2380 case R_386_GNU_VTENTRY:
2384 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2387 /* Remove undefined weak symbol from the dynamic symbol table if it
2388 is resolved to 0. */
2391 elf_i386_fixup_symbol (struct bfd_link_info *info,
2392 struct elf_link_hash_entry *h)
2394 if (h->dynindx != -1
2395 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2396 elf_i386_hash_entry (h)->has_got_reloc,
2397 elf_i386_hash_entry (h)))
2400 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2406 /* Adjust a symbol defined by a dynamic object and referenced by a
2407 regular object. The current definition is in some section of the
2408 dynamic object, but we're not including those sections. We have to
2409 change the definition to something the rest of the link can
2413 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2414 struct elf_link_hash_entry *h)
2416 struct elf_i386_link_hash_table *htab;
2418 struct elf_i386_link_hash_entry *eh;
2419 struct elf_dyn_relocs *p;
2421 /* STT_GNU_IFUNC symbol must go through PLT. */
2422 if (h->type == STT_GNU_IFUNC)
2424 /* All local STT_GNU_IFUNC references must be treate as local
2425 calls via local PLT. */
2427 && SYMBOL_CALLS_LOCAL (info, h))
2429 bfd_size_type pc_count = 0, count = 0;
2430 struct elf_dyn_relocs **pp;
2432 eh = (struct elf_i386_link_hash_entry *) h;
2433 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2435 pc_count += p->pc_count;
2436 p->count -= p->pc_count;
2445 if (pc_count || count)
2449 if (h->plt.refcount <= 0)
2450 h->plt.refcount = 1;
2452 h->plt.refcount += 1;
2456 if (h->plt.refcount <= 0)
2458 h->plt.offset = (bfd_vma) -1;
2464 /* If this is a function, put it in the procedure linkage table. We
2465 will fill in the contents of the procedure linkage table later,
2466 when we know the address of the .got section. */
2467 if (h->type == STT_FUNC
2470 if (h->plt.refcount <= 0
2471 || SYMBOL_CALLS_LOCAL (info, h)
2472 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2473 && h->root.type == bfd_link_hash_undefweak))
2475 /* This case can occur if we saw a PLT32 reloc in an input
2476 file, but the symbol was never referred to by a dynamic
2477 object, or if all references were garbage collected. In
2478 such a case, we don't actually need to build a procedure
2479 linkage table, and we can just do a PC32 reloc instead. */
2480 h->plt.offset = (bfd_vma) -1;
2487 /* It's possible that we incorrectly decided a .plt reloc was
2488 needed for an R_386_PC32 reloc to a non-function sym in
2489 check_relocs. We can't decide accurately between function and
2490 non-function syms in check-relocs; Objects loaded later in
2491 the link may change h->type. So fix it now. */
2492 h->plt.offset = (bfd_vma) -1;
2494 /* If this is a weak symbol, and there is a real definition, the
2495 processor independent code will have arranged for us to see the
2496 real definition first, and we can just use the same value. */
2497 if (h->u.weakdef != NULL)
2499 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2500 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2501 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2502 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2503 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2504 h->non_got_ref = h->u.weakdef->non_got_ref;
2508 /* This is a reference to a symbol defined by a dynamic object which
2509 is not a function. */
2511 /* If we are creating a shared library, we must presume that the
2512 only references to the symbol are via the global offset table.
2513 For such cases we need not do anything here; the relocations will
2514 be handled correctly by relocate_section. */
2515 if (!bfd_link_executable (info))
2518 /* If there are no references to this symbol that do not use the
2519 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2521 eh = (struct elf_i386_link_hash_entry *) h;
2522 if (!h->non_got_ref && !eh->gotoff_ref)
2525 /* If -z nocopyreloc was given, we won't generate them either. */
2526 if (info->nocopyreloc)
2532 htab = elf_i386_hash_table (info);
2536 /* If there aren't any dynamic relocs in read-only sections nor
2537 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2538 avoid the copy reloc. This doesn't work on VxWorks, where we can
2539 not have dynamic relocations (other than copy and jump slot
2540 relocations) in an executable. */
2541 if (ELIMINATE_COPY_RELOCS
2543 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2545 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2547 s = p->sec->output_section;
2548 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2559 /* We must allocate the symbol in our .dynbss section, which will
2560 become part of the .bss section of the executable. There will be
2561 an entry for this symbol in the .dynsym section. The dynamic
2562 object will contain position independent code, so all references
2563 from the dynamic object to this symbol will go through the global
2564 offset table. The dynamic linker will use the .dynsym entry to
2565 determine the address it must put in the global offset table, so
2566 both the dynamic object and the regular object will refer to the
2567 same memory location for the variable. */
2569 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2570 copy the initial value out of the dynamic object and into the
2571 runtime process image. */
2572 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2574 htab->srelbss->size += sizeof (Elf32_External_Rel);
2580 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2583 /* Allocate space in .plt, .got and associated reloc sections for
2587 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2589 struct bfd_link_info *info;
2590 struct elf_i386_link_hash_table *htab;
2591 struct elf_i386_link_hash_entry *eh;
2592 struct elf_dyn_relocs *p;
2593 unsigned plt_entry_size;
2594 bfd_boolean resolved_to_zero;
2596 if (h->root.type == bfd_link_hash_indirect)
2599 eh = (struct elf_i386_link_hash_entry *) h;
2601 info = (struct bfd_link_info *) inf;
2602 htab = elf_i386_hash_table (info);
2606 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2608 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2612 /* Clear the reference count of function pointer relocations if
2613 symbol isn't a normal function. */
2614 if (h->type != STT_FUNC)
2615 eh->func_pointer_refcount = 0;
2617 /* We can't use the GOT PLT if pointer equality is needed since
2618 finish_dynamic_symbol won't clear symbol value and the dynamic
2619 linker won't update the GOT slot. We will get into an infinite
2620 loop at run-time. */
2621 if (htab->plt_got != NULL
2622 && h->type != STT_GNU_IFUNC
2623 && !h->pointer_equality_needed
2624 && h->plt.refcount > 0
2625 && h->got.refcount > 0)
2627 /* Don't use the regular PLT if there are both GOT and GOTPLT
2629 h->plt.offset = (bfd_vma) -1;
2631 /* Use the GOT PLT. */
2632 eh->plt_got.refcount = 1;
2635 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2636 here if it is defined and referenced in a non-shared object. */
2637 if (h->type == STT_GNU_IFUNC
2639 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2640 &htab->readonly_dynrelocs_against_ifunc,
2643 /* Don't create the PLT entry if there are only function pointer
2644 relocations which can be resolved at run-time. */
2645 else if (htab->elf.dynamic_sections_created
2646 && (h->plt.refcount > eh->func_pointer_refcount
2647 || eh->plt_got.refcount > 0))
2649 bfd_boolean use_plt_got;
2651 /* Clear the reference count of function pointer relocations
2653 eh->func_pointer_refcount = 0;
2655 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2657 /* Don't use the regular PLT for DF_BIND_NOW. */
2658 h->plt.offset = (bfd_vma) -1;
2660 /* Use the GOT PLT. */
2661 h->got.refcount = 1;
2662 eh->plt_got.refcount = 1;
2665 use_plt_got = eh->plt_got.refcount > 0;
2667 /* Make sure this symbol is output as a dynamic symbol.
2668 Undefined weak syms won't yet be marked as dynamic. */
2669 if (h->dynindx == -1
2671 && !resolved_to_zero)
2673 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2677 if (bfd_link_pic (info)
2678 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2680 asection *s = htab->elf.splt;
2681 asection *got_s = htab->plt_got;
2683 /* If this is the first .plt entry, make room for the special
2684 first entry. The .plt section is used by prelink to undo
2685 prelinking for dynamic relocations. */
2687 s->size = plt_entry_size;
2690 eh->plt_got.offset = got_s->size;
2692 h->plt.offset = s->size;
2694 /* If this symbol is not defined in a regular file, and we are
2695 not generating a shared library, then set the symbol to this
2696 location in the .plt. This is required to make function
2697 pointers compare as equal between the normal executable and
2698 the shared library. */
2699 if (! bfd_link_pic (info)
2704 /* We need to make a call to the entry of the GOT PLT
2705 instead of regular PLT entry. */
2706 h->root.u.def.section = got_s;
2707 h->root.u.def.value = eh->plt_got.offset;
2711 h->root.u.def.section = s;
2712 h->root.u.def.value = h->plt.offset;
2716 /* Make room for this entry. */
2718 got_s->size += sizeof (elf_i386_got_plt_entry);
2721 s->size += plt_entry_size;
2723 /* We also need to make an entry in the .got.plt section,
2724 which will be placed in the .got section by the linker
2726 htab->elf.sgotplt->size += 4;
2728 /* There should be no PLT relocation against resolved
2729 undefined weak symbol in executable. */
2730 if (!resolved_to_zero)
2732 /* We also need to make an entry in the .rel.plt
2734 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2735 htab->elf.srelplt->reloc_count++;
2739 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2740 && !bfd_link_pic (info))
2742 /* VxWorks has a second set of relocations for each PLT entry
2743 in executables. They go in a separate relocation section,
2744 which is processed by the kernel loader. */
2746 /* There are two relocations for the initial PLT entry: an
2747 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2748 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2750 if (h->plt.offset == plt_entry_size)
2751 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2753 /* There are two extra relocations for each subsequent PLT entry:
2754 an R_386_32 relocation for the GOT entry, and an R_386_32
2755 relocation for the PLT entry. */
2757 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2762 eh->plt_got.offset = (bfd_vma) -1;
2763 h->plt.offset = (bfd_vma) -1;
2769 eh->plt_got.offset = (bfd_vma) -1;
2770 h->plt.offset = (bfd_vma) -1;
2774 eh->tlsdesc_got = (bfd_vma) -1;
2776 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2777 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2778 if (h->got.refcount > 0
2779 && bfd_link_executable (info)
2781 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2782 h->got.offset = (bfd_vma) -1;
2783 else if (h->got.refcount > 0)
2787 int tls_type = elf_i386_hash_entry(h)->tls_type;
2789 /* Make sure this symbol is output as a dynamic symbol.
2790 Undefined weak syms won't yet be marked as dynamic. */
2791 if (h->dynindx == -1
2793 && !resolved_to_zero)
2795 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2800 if (GOT_TLS_GDESC_P (tls_type))
2802 eh->tlsdesc_got = htab->elf.sgotplt->size
2803 - elf_i386_compute_jump_table_size (htab);
2804 htab->elf.sgotplt->size += 8;
2805 h->got.offset = (bfd_vma) -2;
2807 if (! GOT_TLS_GDESC_P (tls_type)
2808 || GOT_TLS_GD_P (tls_type))
2810 h->got.offset = s->size;
2812 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2813 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2816 dyn = htab->elf.dynamic_sections_created;
2817 /* R_386_TLS_IE_32 needs one dynamic relocation,
2818 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2819 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2820 need two), R_386_TLS_GD needs one if local symbol and two if
2821 global. No dynamic relocation against resolved undefined weak
2822 symbol in executable. */
2823 if (tls_type == GOT_TLS_IE_BOTH)
2824 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2825 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2826 || (tls_type & GOT_TLS_IE))
2827 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2828 else if (GOT_TLS_GD_P (tls_type))
2829 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2830 else if (! GOT_TLS_GDESC_P (tls_type)
2831 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2832 && !resolved_to_zero)
2833 || h->root.type != bfd_link_hash_undefweak)
2834 && (bfd_link_pic (info)
2835 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2836 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2837 if (GOT_TLS_GDESC_P (tls_type))
2838 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2841 h->got.offset = (bfd_vma) -1;
2843 if (eh->dyn_relocs == NULL)
2846 /* In the shared -Bsymbolic case, discard space allocated for
2847 dynamic pc-relative relocs against symbols which turn out to be
2848 defined in regular objects. For the normal shared case, discard
2849 space for pc-relative relocs that have become local due to symbol
2850 visibility changes. */
2852 if (bfd_link_pic (info))
2854 /* The only reloc that uses pc_count is R_386_PC32, which will
2855 appear on a call or on something like ".long foo - .". We
2856 want calls to protected symbols to resolve directly to the
2857 function rather than going via the plt. If people want
2858 function pointer comparisons to work as expected then they
2859 should avoid writing assembly like ".long foo - .". */
2860 if (SYMBOL_CALLS_LOCAL (info, h))
2862 struct elf_dyn_relocs **pp;
2864 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2866 p->count -= p->pc_count;
2875 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2877 struct elf_dyn_relocs **pp;
2878 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2880 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2887 /* Also discard relocs on undefined weak syms with non-default
2888 visibility or in PIE. */
2889 if (eh->dyn_relocs != NULL
2890 && h->root.type == bfd_link_hash_undefweak)
2892 /* Undefined weak symbol is never bound locally in shared
2894 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2895 || resolved_to_zero)
2899 /* Keep dynamic non-GOT/non-PLT relocation so that we
2900 can branch to 0 without PLT. */
2901 struct elf_dyn_relocs **pp;
2903 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2904 if (p->pc_count == 0)
2908 /* Remove non-R_386_PC32 relocation. */
2909 p->count = p->pc_count;
2913 if (eh->dyn_relocs != NULL)
2915 /* Make sure undefined weak symbols are output
2916 as dynamic symbols in PIEs for dynamic non-GOT
2917 non-PLT reloations. */
2918 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2923 eh->dyn_relocs = NULL;
2925 else if (h->dynindx == -1
2926 && !h->forced_local)
2928 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2933 else if (ELIMINATE_COPY_RELOCS)
2935 /* For the non-shared case, discard space for relocs against
2936 symbols which turn out to need copy relocs or are not
2937 dynamic. Keep dynamic relocations for run-time function
2938 pointer initialization. */
2940 if ((!h->non_got_ref
2941 || eh->func_pointer_refcount > 0
2942 || (h->root.type == bfd_link_hash_undefweak
2943 && !resolved_to_zero))
2946 || (htab->elf.dynamic_sections_created
2947 && (h->root.type == bfd_link_hash_undefweak
2948 || h->root.type == bfd_link_hash_undefined))))
2950 /* Make sure this symbol is output as a dynamic symbol.
2951 Undefined weak syms won't yet be marked as dynamic. */
2952 if (h->dynindx == -1
2954 && !resolved_to_zero)
2956 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2960 /* If that succeeded, we know we'll be keeping all the
2962 if (h->dynindx != -1)
2966 eh->dyn_relocs = NULL;
2967 eh->func_pointer_refcount = 0;
2972 /* Finally, allocate space. */
2973 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2977 sreloc = elf_section_data (p->sec)->sreloc;
2979 BFD_ASSERT (sreloc != NULL);
2980 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2986 /* Allocate space in .plt, .got and associated reloc sections for
2987 local dynamic relocs. */
2990 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2992 struct elf_link_hash_entry *h
2993 = (struct elf_link_hash_entry *) *slot;
2995 if (h->type != STT_GNU_IFUNC
2999 || h->root.type != bfd_link_hash_defined)
3002 return elf_i386_allocate_dynrelocs (h, inf);
3005 /* Find any dynamic relocs that apply to read-only sections. */
3008 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3010 struct elf_i386_link_hash_entry *eh;
3011 struct elf_dyn_relocs *p;
3013 /* Skip local IFUNC symbols. */
3014 if (h->forced_local && h->type == STT_GNU_IFUNC)
3017 eh = (struct elf_i386_link_hash_entry *) h;
3018 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3020 asection *s = p->sec->output_section;
3022 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3024 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3026 info->flags |= DF_TEXTREL;
3028 if ((info->warn_shared_textrel && bfd_link_pic (info))
3029 || info->error_textrel)
3030 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3031 p->sec->owner, h->root.root.string,
3034 /* Not an error, just cut short the traversal. */
3041 /* Convert load via the GOT slot to load immediate. */
3044 elf_i386_convert_load (bfd *abfd, asection *sec,
3045 struct bfd_link_info *link_info)
3047 struct elf_i386_link_hash_table *htab;
3048 Elf_Internal_Shdr *symtab_hdr;
3049 Elf_Internal_Rela *internal_relocs;
3050 Elf_Internal_Rela *irel, *irelend;
3052 bfd_boolean changed;
3053 bfd_signed_vma *local_got_refcounts;
3055 /* Don't even try to convert non-ELF outputs. */
3056 if (!is_elf_hash_table (link_info->hash))
3059 /* Nothing to do if there is no need or no output. */
3060 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
3061 || sec->need_convert_load == 0
3062 || bfd_is_abs_section (sec->output_section))
3065 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3067 /* Load the relocations for this section. */
3068 internal_relocs = (_bfd_elf_link_read_relocs
3069 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3070 link_info->keep_memory));
3071 if (internal_relocs == NULL)
3075 htab = elf_i386_hash_table (link_info);
3076 local_got_refcounts = elf_local_got_refcounts (abfd);
3078 /* Get the section contents. */
3079 if (elf_section_data (sec)->this_hdr.contents != NULL)
3080 contents = elf_section_data (sec)->this_hdr.contents;
3083 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3087 irelend = internal_relocs + sec->reloc_count;
3088 for (irel = internal_relocs; irel < irelend; irel++)
3090 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3091 unsigned int r_symndx;
3092 struct elf_link_hash_entry *h;
3093 bfd_boolean converted;
3095 /* Don't convert R_386_GOT32 since we can't tell if it is applied
3096 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
3097 if (r_type != R_386_GOT32X)
3100 r_symndx = ELF32_R_SYM (irel->r_info);
3101 if (r_symndx < symtab_hdr->sh_info)
3102 h = elf_i386_get_local_sym_hash (htab, sec->owner,
3103 (const Elf_Internal_Rela *) irel,
3107 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
3108 while (h->root.type == bfd_link_hash_indirect
3109 || h->root.type == bfd_link_hash_warning)
3110 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3113 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3114 if (h != NULL && h->type == STT_GNU_IFUNC)
3118 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
3119 irel, h, &converted, link_info))
3124 changed = converted;
3127 if (h->got.refcount > 0)
3128 h->got.refcount -= 1;
3132 if (local_got_refcounts != NULL
3133 && local_got_refcounts[r_symndx] > 0)
3134 local_got_refcounts[r_symndx] -= 1;
3139 if (contents != NULL
3140 && elf_section_data (sec)->this_hdr.contents != contents)
3142 if (!changed && !link_info->keep_memory)
3146 /* Cache the section contents for elf_link_input_bfd. */
3147 elf_section_data (sec)->this_hdr.contents = contents;
3151 if (elf_section_data (sec)->relocs != internal_relocs)
3154 free (internal_relocs);
3156 elf_section_data (sec)->relocs = internal_relocs;
3162 if (contents != NULL
3163 && elf_section_data (sec)->this_hdr.contents != contents)
3165 if (internal_relocs != NULL
3166 && elf_section_data (sec)->relocs != internal_relocs)
3167 free (internal_relocs);
3171 /* Set the sizes of the dynamic sections. */
3174 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
3176 struct elf_i386_link_hash_table *htab;
3182 htab = elf_i386_hash_table (info);
3185 dynobj = htab->elf.dynobj;
3189 /* Set up .got offsets for local syms, and space for local dynamic
3191 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3193 bfd_signed_vma *local_got;
3194 bfd_signed_vma *end_local_got;
3195 char *local_tls_type;
3196 bfd_vma *local_tlsdesc_gotent;
3197 bfd_size_type locsymcount;
3198 Elf_Internal_Shdr *symtab_hdr;
3201 if (! is_i386_elf (ibfd))
3204 for (s = ibfd->sections; s != NULL; s = s->next)
3206 struct elf_dyn_relocs *p;
3208 if (!elf_i386_convert_load (ibfd, s, info))
3211 for (p = ((struct elf_dyn_relocs *)
3212 elf_section_data (s)->local_dynrel);
3216 if (!bfd_is_abs_section (p->sec)
3217 && bfd_is_abs_section (p->sec->output_section))
3219 /* Input section has been discarded, either because
3220 it is a copy of a linkonce section or due to
3221 linker script /DISCARD/, so we'll be discarding
3224 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3225 && strcmp (p->sec->output_section->name,
3228 /* Relocations in vxworks .tls_vars sections are
3229 handled specially by the loader. */
3231 else if (p->count != 0)
3233 srel = elf_section_data (p->sec)->sreloc;
3234 srel->size += p->count * sizeof (Elf32_External_Rel);
3235 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3236 && (info->flags & DF_TEXTREL) == 0)
3238 info->flags |= DF_TEXTREL;
3239 if ((info->warn_shared_textrel && bfd_link_pic (info))
3240 || info->error_textrel)
3241 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3242 p->sec->owner, p->sec);
3248 local_got = elf_local_got_refcounts (ibfd);
3252 symtab_hdr = &elf_symtab_hdr (ibfd);
3253 locsymcount = symtab_hdr->sh_info;
3254 end_local_got = local_got + locsymcount;
3255 local_tls_type = elf_i386_local_got_tls_type (ibfd);
3256 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
3258 srel = htab->elf.srelgot;
3259 for (; local_got < end_local_got;
3260 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3262 *local_tlsdesc_gotent = (bfd_vma) -1;
3265 if (GOT_TLS_GDESC_P (*local_tls_type))
3267 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3268 - elf_i386_compute_jump_table_size (htab);
3269 htab->elf.sgotplt->size += 8;
3270 *local_got = (bfd_vma) -2;
3272 if (! GOT_TLS_GDESC_P (*local_tls_type)
3273 || GOT_TLS_GD_P (*local_tls_type))
3275 *local_got = s->size;
3277 if (GOT_TLS_GD_P (*local_tls_type)
3278 || *local_tls_type == GOT_TLS_IE_BOTH)
3281 if (bfd_link_pic (info)
3282 || GOT_TLS_GD_ANY_P (*local_tls_type)
3283 || (*local_tls_type & GOT_TLS_IE))
3285 if (*local_tls_type == GOT_TLS_IE_BOTH)
3286 srel->size += 2 * sizeof (Elf32_External_Rel);
3287 else if (GOT_TLS_GD_P (*local_tls_type)
3288 || ! GOT_TLS_GDESC_P (*local_tls_type))
3289 srel->size += sizeof (Elf32_External_Rel);
3290 if (GOT_TLS_GDESC_P (*local_tls_type))
3291 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
3295 *local_got = (bfd_vma) -1;
3299 if (htab->tls_ldm_got.refcount > 0)
3301 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3303 htab->tls_ldm_got.offset = htab->elf.sgot->size;
3304 htab->elf.sgot->size += 8;
3305 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
3308 htab->tls_ldm_got.offset = -1;
3310 /* Allocate global sym .plt and .got entries, and space for global
3311 sym dynamic relocs. */
3312 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
3314 /* Allocate .plt and .got entries, and space for local symbols. */
3315 htab_traverse (htab->loc_hash_table,
3316 elf_i386_allocate_local_dynrelocs,
3319 /* For every jump slot reserved in the sgotplt, reloc_count is
3320 incremented. However, when we reserve space for TLS descriptors,
3321 it's not incremented, so in order to compute the space reserved
3322 for them, it suffices to multiply the reloc count by the jump
3325 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3326 so that R_386_IRELATIVE entries come last. */
3327 if (htab->elf.srelplt)
3329 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
3330 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
3331 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3333 else if (htab->elf.irelplt)
3334 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3337 if (htab->elf.sgotplt)
3339 /* Don't allocate .got.plt section if there are no GOT nor PLT
3340 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3341 if ((htab->elf.hgot == NULL
3342 || !htab->elf.hgot->ref_regular_nonweak)
3343 && (htab->elf.sgotplt->size
3344 == get_elf_backend_data (output_bfd)->got_header_size)
3345 && (htab->elf.splt == NULL
3346 || htab->elf.splt->size == 0)
3347 && (htab->elf.sgot == NULL
3348 || htab->elf.sgot->size == 0)
3349 && (htab->elf.iplt == NULL
3350 || htab->elf.iplt->size == 0)
3351 && (htab->elf.igotplt == NULL
3352 || htab->elf.igotplt->size == 0))
3353 htab->elf.sgotplt->size = 0;
3357 if (htab->plt_eh_frame != NULL
3358 && htab->elf.splt != NULL
3359 && htab->elf.splt->size != 0
3360 && !bfd_is_abs_section (htab->elf.splt->output_section)
3361 && _bfd_elf_eh_frame_present (info))
3362 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
3364 /* We now have determined the sizes of the various dynamic sections.
3365 Allocate memory for them. */
3367 for (s = dynobj->sections; s != NULL; s = s->next)
3369 bfd_boolean strip_section = TRUE;
3371 if ((s->flags & SEC_LINKER_CREATED) == 0)
3374 if (s == htab->elf.splt
3375 || s == htab->elf.sgot)
3377 /* Strip this section if we don't need it; see the
3379 /* We'd like to strip these sections if they aren't needed, but if
3380 we've exported dynamic symbols from them we must leave them.
3381 It's too late to tell BFD to get rid of the symbols. */
3383 if (htab->elf.hplt != NULL)
3384 strip_section = FALSE;
3386 else if (s == htab->elf.sgotplt
3387 || s == htab->elf.iplt
3388 || s == htab->elf.igotplt
3389 || s == htab->plt_got
3390 || s == htab->plt_eh_frame
3391 || s == htab->sdynbss)
3393 /* Strip these too. */
3395 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
3398 && s != htab->elf.srelplt
3399 && s != htab->srelplt2)
3402 /* We use the reloc_count field as a counter if we need
3403 to copy relocs into the output file. */
3408 /* It's not one of our sections, so don't allocate space. */
3414 /* If we don't need this section, strip it from the
3415 output file. This is mostly to handle .rel.bss and
3416 .rel.plt. We must create both sections in
3417 create_dynamic_sections, because they must be created
3418 before the linker maps input sections to output
3419 sections. The linker does that before
3420 adjust_dynamic_symbol is called, and it is that
3421 function which decides whether anything needs to go
3422 into these sections. */
3424 s->flags |= SEC_EXCLUDE;
3428 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3431 /* Allocate memory for the section contents. We use bfd_zalloc
3432 here in case unused entries are not reclaimed before the
3433 section's contents are written out. This should not happen,
3434 but this way if it does, we get a R_386_NONE reloc instead
3436 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3437 if (s->contents == NULL)
3441 if (htab->plt_eh_frame != NULL
3442 && htab->plt_eh_frame->contents != NULL)
3444 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3445 sizeof (elf_i386_eh_frame_plt));
3446 bfd_put_32 (dynobj, htab->elf.splt->size,
3447 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3450 if (htab->elf.dynamic_sections_created)
3452 /* Add some entries to the .dynamic section. We fill in the
3453 values later, in elf_i386_finish_dynamic_sections, but we
3454 must add the entries now so that we get the correct size for
3455 the .dynamic section. The DT_DEBUG entry is filled in by the
3456 dynamic linker and used by the debugger. */
3457 #define add_dynamic_entry(TAG, VAL) \
3458 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3460 if (bfd_link_executable (info))
3462 if (!add_dynamic_entry (DT_DEBUG, 0))
3466 if (htab->elf.splt->size != 0)
3468 /* DT_PLTGOT is used by prelink even if there is no PLT
3470 if (!add_dynamic_entry (DT_PLTGOT, 0))
3473 if (htab->elf.srelplt->size != 0)
3475 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3476 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3477 || !add_dynamic_entry (DT_JMPREL, 0))
3484 if (!add_dynamic_entry (DT_REL, 0)
3485 || !add_dynamic_entry (DT_RELSZ, 0)
3486 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3489 /* If any dynamic relocs apply to a read-only section,
3490 then we need a DT_TEXTREL entry. */
3491 if ((info->flags & DF_TEXTREL) == 0)
3492 elf_link_hash_traverse (&htab->elf,
3493 elf_i386_readonly_dynrelocs, info);
3495 if ((info->flags & DF_TEXTREL) != 0)
3497 if (htab->readonly_dynrelocs_against_ifunc)
3499 info->callbacks->einfo
3500 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3501 bfd_set_error (bfd_error_bad_value);
3505 if (!add_dynamic_entry (DT_TEXTREL, 0))
3509 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3510 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3513 #undef add_dynamic_entry
3519 elf_i386_always_size_sections (bfd *output_bfd,
3520 struct bfd_link_info *info)
3522 asection *tls_sec = elf_hash_table (info)->tls_sec;
3526 struct elf_link_hash_entry *tlsbase;
3528 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3529 "_TLS_MODULE_BASE_",
3530 FALSE, FALSE, FALSE);
3532 if (tlsbase && tlsbase->type == STT_TLS)
3534 struct elf_i386_link_hash_table *htab;
3535 struct bfd_link_hash_entry *bh = NULL;
3536 const struct elf_backend_data *bed
3537 = get_elf_backend_data (output_bfd);
3539 htab = elf_i386_hash_table (info);
3543 if (!(_bfd_generic_link_add_one_symbol
3544 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3545 tls_sec, 0, NULL, FALSE,
3546 bed->collect, &bh)))
3549 htab->tls_module_base = bh;
3551 tlsbase = (struct elf_link_hash_entry *)bh;
3552 tlsbase->def_regular = 1;
3553 tlsbase->other = STV_HIDDEN;
3554 tlsbase->root.linker_def = 1;
3555 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3562 /* Set the correct type for an x86 ELF section. We do this by the
3563 section name, which is a hack, but ought to work. */
3566 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3567 Elf_Internal_Shdr *hdr,
3572 name = bfd_get_section_name (abfd, sec);
3574 /* This is an ugly, but unfortunately necessary hack that is
3575 needed when producing EFI binaries on x86. It tells
3576 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3577 containing ELF relocation info. We need this hack in order to
3578 be able to generate ELF binaries that can be translated into
3579 EFI applications (which are essentially COFF objects). Those
3580 files contain a COFF ".reloc" section inside an ELFNN object,
3581 which would normally cause BFD to segfault because it would
3582 attempt to interpret this section as containing relocation
3583 entries for section "oc". With this hack enabled, ".reloc"
3584 will be treated as a normal data section, which will avoid the
3585 segfault. However, you won't be able to create an ELFNN binary
3586 with a section named "oc" that needs relocations, but that's
3587 the kind of ugly side-effects you get when detecting section
3588 types based on their names... In practice, this limitation is
3589 unlikely to bite. */
3590 if (strcmp (name, ".reloc") == 0)
3591 hdr->sh_type = SHT_PROGBITS;
3596 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3597 executables. Rather than setting it to the beginning of the TLS
3598 section, we have to set it to the end. This function may be called
3599 multiple times, it is idempotent. */
3602 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3604 struct elf_i386_link_hash_table *htab;
3605 struct bfd_link_hash_entry *base;
3607 if (!bfd_link_executable (info))
3610 htab = elf_i386_hash_table (info);
3614 base = htab->tls_module_base;
3618 base->u.def.value = htab->elf.tls_size;
3621 /* Return the base VMA address which should be subtracted from real addresses
3622 when resolving @dtpoff relocation.
3623 This is PT_TLS segment p_vaddr. */
3626 elf_i386_dtpoff_base (struct bfd_link_info *info)
3628 /* If tls_sec is NULL, we should have signalled an error already. */
3629 if (elf_hash_table (info)->tls_sec == NULL)
3631 return elf_hash_table (info)->tls_sec->vma;
3634 /* Return the relocation value for @tpoff relocation
3635 if STT_TLS virtual address is ADDRESS. */
3638 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3640 struct elf_link_hash_table *htab = elf_hash_table (info);
3641 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3642 bfd_vma static_tls_size;
3644 /* If tls_sec is NULL, we should have signalled an error already. */
3645 if (htab->tls_sec == NULL)
3648 /* Consider special static TLS alignment requirements. */
3649 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3650 return static_tls_size + htab->tls_sec->vma - address;
3653 /* Relocate an i386 ELF section. */
3656 elf_i386_relocate_section (bfd *output_bfd,
3657 struct bfd_link_info *info,
3659 asection *input_section,
3661 Elf_Internal_Rela *relocs,
3662 Elf_Internal_Sym *local_syms,
3663 asection **local_sections)
3665 struct elf_i386_link_hash_table *htab;
3666 Elf_Internal_Shdr *symtab_hdr;
3667 struct elf_link_hash_entry **sym_hashes;
3668 bfd_vma *local_got_offsets;
3669 bfd_vma *local_tlsdesc_gotents;
3670 Elf_Internal_Rela *rel;
3671 Elf_Internal_Rela *wrel;
3672 Elf_Internal_Rela *relend;
3673 bfd_boolean is_vxworks_tls;
3674 unsigned plt_entry_size;
3676 BFD_ASSERT (is_i386_elf (input_bfd));
3678 /* Skip if check_relocs failed. */
3679 if (input_section->check_relocs_failed)
3682 htab = elf_i386_hash_table (info);
3685 symtab_hdr = &elf_symtab_hdr (input_bfd);
3686 sym_hashes = elf_sym_hashes (input_bfd);
3687 local_got_offsets = elf_local_got_offsets (input_bfd);
3688 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3689 /* We have to handle relocations in vxworks .tls_vars sections
3690 specially, because the dynamic loader is 'weird'. */
3691 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3692 && bfd_link_pic (info)
3693 && !strcmp (input_section->output_section->name,
3696 elf_i386_set_tls_module_base (info);
3698 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3700 rel = wrel = relocs;
3701 relend = relocs + input_section->reloc_count;
3702 for (; rel < relend; wrel++, rel++)
3704 unsigned int r_type;
3705 reloc_howto_type *howto;
3706 unsigned long r_symndx;
3707 struct elf_link_hash_entry *h;
3708 struct elf_i386_link_hash_entry *eh;
3709 Elf_Internal_Sym *sym;
3711 bfd_vma off, offplt, plt_offset;
3713 bfd_boolean unresolved_reloc;
3714 bfd_reloc_status_type r;
3718 asection *resolved_plt;
3719 bfd_boolean resolved_to_zero;
3721 r_type = ELF32_R_TYPE (rel->r_info);
3722 if (r_type == R_386_GNU_VTINHERIT
3723 || r_type == R_386_GNU_VTENTRY)
3730 if ((indx = r_type) >= R_386_standard
3731 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3732 >= R_386_ext - R_386_standard)
3733 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3734 >= R_386_ext2 - R_386_ext))
3736 (*_bfd_error_handler)
3737 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3738 input_bfd, input_section, r_type);
3739 bfd_set_error (bfd_error_bad_value);
3742 howto = elf_howto_table + indx;
3744 r_symndx = ELF32_R_SYM (rel->r_info);
3748 unresolved_reloc = FALSE;
3749 if (r_symndx < symtab_hdr->sh_info)
3751 sym = local_syms + r_symndx;
3752 sec = local_sections[r_symndx];
3753 relocation = (sec->output_section->vma
3754 + sec->output_offset
3756 st_size = sym->st_size;
3758 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3759 && ((sec->flags & SEC_MERGE) != 0
3760 || (bfd_link_relocatable (info)
3761 && sec->output_offset != 0)))
3764 bfd_byte *where = contents + rel->r_offset;
3766 switch (howto->size)
3769 addend = bfd_get_8 (input_bfd, where);
3770 if (howto->pc_relative)
3772 addend = (addend ^ 0x80) - 0x80;
3777 addend = bfd_get_16 (input_bfd, where);
3778 if (howto->pc_relative)
3780 addend = (addend ^ 0x8000) - 0x8000;
3785 addend = bfd_get_32 (input_bfd, where);
3786 if (howto->pc_relative)
3788 addend = (addend ^ 0x80000000) - 0x80000000;
3796 if (bfd_link_relocatable (info))
3797 addend += sec->output_offset;
3800 asection *msec = sec;
3801 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3803 addend -= relocation;
3804 addend += msec->output_section->vma + msec->output_offset;
3807 switch (howto->size)
3810 /* FIXME: overflow checks. */
3811 if (howto->pc_relative)
3813 bfd_put_8 (input_bfd, addend, where);
3816 if (howto->pc_relative)
3818 bfd_put_16 (input_bfd, addend, where);
3821 if (howto->pc_relative)
3823 bfd_put_32 (input_bfd, addend, where);
3827 else if (!bfd_link_relocatable (info)
3828 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3830 /* Relocate against local STT_GNU_IFUNC symbol. */
3831 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3836 /* Set STT_GNU_IFUNC symbol value. */
3837 h->root.u.def.value = sym->st_value;
3838 h->root.u.def.section = sec;
3843 bfd_boolean warned ATTRIBUTE_UNUSED;
3844 bfd_boolean ignored ATTRIBUTE_UNUSED;
3846 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3847 r_symndx, symtab_hdr, sym_hashes,
3849 unresolved_reloc, warned, ignored);
3853 if (sec != NULL && discarded_section (sec))
3855 _bfd_clear_contents (howto, input_bfd, input_section,
3856 contents + rel->r_offset);
3857 wrel->r_offset = rel->r_offset;
3861 /* For ld -r, remove relocations in debug sections against
3862 sections defined in discarded sections. Not done for
3863 eh_frame editing code expects to be present. */
3864 if (bfd_link_relocatable (info)
3865 && (input_section->flags & SEC_DEBUGGING))
3871 if (bfd_link_relocatable (info))
3878 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3879 it here if it is defined in a non-shared object. */
3881 && h->type == STT_GNU_IFUNC
3884 asection *plt, *gotplt, *base_got;
3888 if ((input_section->flags & SEC_ALLOC) == 0)
3890 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3891 sections because such sections are not SEC_ALLOC and
3892 thus ld.so will not process them. */
3893 if ((input_section->flags & SEC_DEBUGGING) != 0)
3897 else if (h->plt.offset == (bfd_vma) -1)
3900 /* STT_GNU_IFUNC symbol must go through PLT. */
3901 if (htab->elf.splt != NULL)
3903 plt = htab->elf.splt;
3904 gotplt = htab->elf.sgotplt;
3908 plt = htab->elf.iplt;
3909 gotplt = htab->elf.igotplt;
3912 relocation = (plt->output_section->vma
3913 + plt->output_offset + h->plt.offset);
3918 if (h->root.root.string)
3919 name = h->root.root.string;
3921 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3923 (*_bfd_error_handler)
3924 (_("%B: relocation %s against STT_GNU_IFUNC "
3925 "symbol `%s' isn't handled by %s"), input_bfd,
3926 elf_howto_table[r_type].name,
3927 name, __FUNCTION__);
3928 bfd_set_error (bfd_error_bad_value);
3932 /* Generate dynamic relcoation only when there is a
3933 non-GOT reference in a shared object. */
3934 if (bfd_link_pic (info) && h->non_got_ref)
3936 Elf_Internal_Rela outrel;
3940 /* Need a dynamic relocation to get the real function
3942 offset = _bfd_elf_section_offset (output_bfd,
3946 if (offset == (bfd_vma) -1
3947 || offset == (bfd_vma) -2)
3950 outrel.r_offset = (input_section->output_section->vma
3951 + input_section->output_offset
3954 if (h->dynindx == -1
3956 || bfd_link_executable (info))
3958 /* This symbol is resolved locally. */
3959 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3960 bfd_put_32 (output_bfd,
3961 (h->root.u.def.value
3962 + h->root.u.def.section->output_section->vma
3963 + h->root.u.def.section->output_offset),
3967 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3969 sreloc = htab->elf.irelifunc;
3970 elf_append_rel (output_bfd, sreloc, &outrel);
3972 /* If this reloc is against an external symbol, we
3973 do not want to fiddle with the addend. Otherwise,
3974 we need to include the symbol value so that it
3975 becomes an addend for the dynamic reloc. For an
3976 internal symbol, we have updated addend. */
3986 base_got = htab->elf.sgot;
3987 off = h->got.offset;
3989 if (base_got == NULL)
3992 if (off == (bfd_vma) -1)
3994 /* We can't use h->got.offset here to save state, or
3995 even just remember the offset, as finish_dynamic_symbol
3996 would use that as offset into .got. */
3998 if (htab->elf.splt != NULL)
4000 plt_index = h->plt.offset / plt_entry_size - 1;
4001 off = (plt_index + 3) * 4;
4002 base_got = htab->elf.sgotplt;
4006 plt_index = h->plt.offset / plt_entry_size;
4007 off = plt_index * 4;
4008 base_got = htab->elf.igotplt;
4011 if (h->dynindx == -1
4015 /* This references the local defitionion. We must
4016 initialize this entry in the global offset table.
4017 Since the offset must always be a multiple of 8,
4018 we use the least significant bit to record
4019 whether we have initialized it already.
4021 When doing a dynamic link, we create a .rela.got
4022 relocation entry to initialize the value. This
4023 is done in the finish_dynamic_symbol routine. */
4028 bfd_put_32 (output_bfd, relocation,
4029 base_got->contents + off);
4036 /* Adjust for static executables. */
4037 if (htab->elf.splt == NULL)
4038 relocation += gotplt->output_offset;
4042 relocation = (base_got->output_section->vma
4043 + base_got->output_offset + off
4044 - gotplt->output_section->vma
4045 - gotplt->output_offset);
4046 /* Adjust for static executables. */
4047 if (htab->elf.splt == NULL)
4048 relocation += gotplt->output_offset;
4054 relocation -= (gotplt->output_section->vma
4055 + gotplt->output_offset);
4060 eh = (struct elf_i386_link_hash_entry *) h;
4061 resolved_to_zero = (eh != NULL
4062 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4069 /* Avoid optimizing _DYNAMIC since ld.so may use its
4070 link-time address. */
4071 if (h == htab->elf.hdynamic)
4074 if (bfd_link_pic (info))
4076 /* It is OK to convert mov to lea and convert indirect
4077 branch to direct branch. It is OK to convert adc,
4078 add, and, cmp, or, sbb, sub, test, xor only when PIC
4080 unsigned int opcode, addend;
4081 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
4084 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4085 if (opcode != 0x8b && opcode != 0xff)
4089 /* Resolve "mov GOT[(%reg)], %reg",
4090 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4091 and "binop foo@GOT[(%reg)], %reg". */
4093 || (h->plt.offset == (bfd_vma) -1
4094 && h->got.offset == (bfd_vma) -1)
4095 || htab->elf.sgotplt == NULL)
4098 offplt = (htab->elf.sgotplt->output_section->vma
4099 + htab->elf.sgotplt->output_offset);
4101 /* It is relative to .got.plt section. */
4102 if (h->got.offset != (bfd_vma) -1)
4103 /* Use GOT entry. Mask off the least significant bit in
4104 GOT offset which may be set by R_386_GOT32 processing
4106 relocation = (htab->elf.sgot->output_section->vma
4107 + htab->elf.sgot->output_offset
4108 + (h->got.offset & ~1) - offplt);
4110 /* Use GOTPLT entry. */
4111 relocation = (h->plt.offset / plt_entry_size - 1 + 3) * 4;
4113 if (!bfd_link_pic (info))
4115 /* If not PIC, add the .got.plt section address for
4116 baseless addressing. */
4118 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4119 if ((modrm & 0xc7) == 0x5)
4120 relocation += offplt;
4123 unresolved_reloc = FALSE;
4128 /* Relocation is to the entry for this symbol in the global
4130 if (htab->elf.sgot == NULL)
4137 off = h->got.offset;
4138 dyn = htab->elf.dynamic_sections_created;
4139 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4140 bfd_link_pic (info),
4142 || (bfd_link_pic (info)
4143 && SYMBOL_REFERENCES_LOCAL (info, h))
4144 || (ELF_ST_VISIBILITY (h->other)
4145 && h->root.type == bfd_link_hash_undefweak))
4147 /* This is actually a static link, or it is a
4148 -Bsymbolic link and the symbol is defined
4149 locally, or the symbol was forced to be local
4150 because of a version file. We must initialize
4151 this entry in the global offset table. Since the
4152 offset must always be a multiple of 4, we use the
4153 least significant bit to record whether we have
4154 initialized it already.
4156 When doing a dynamic link, we create a .rel.got
4157 relocation entry to initialize the value. This
4158 is done in the finish_dynamic_symbol routine. */
4163 bfd_put_32 (output_bfd, relocation,
4164 htab->elf.sgot->contents + off);
4169 unresolved_reloc = FALSE;
4173 if (local_got_offsets == NULL)
4176 off = local_got_offsets[r_symndx];
4178 /* The offset must always be a multiple of 4. We use
4179 the least significant bit to record whether we have
4180 already generated the necessary reloc. */
4185 bfd_put_32 (output_bfd, relocation,
4186 htab->elf.sgot->contents + off);
4188 if (bfd_link_pic (info))
4191 Elf_Internal_Rela outrel;
4193 s = htab->elf.srelgot;
4197 outrel.r_offset = (htab->elf.sgot->output_section->vma
4198 + htab->elf.sgot->output_offset
4200 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4201 elf_append_rel (output_bfd, s, &outrel);
4204 local_got_offsets[r_symndx] |= 1;
4208 if (off >= (bfd_vma) -2)
4211 relocation = htab->elf.sgot->output_section->vma
4212 + htab->elf.sgot->output_offset + off
4213 - htab->elf.sgotplt->output_section->vma
4214 - htab->elf.sgotplt->output_offset;
4218 /* Relocation is relative to the start of the global offset
4221 /* Check to make sure it isn't a protected function or data
4222 symbol for shared library since it may not be local when
4223 used as function address or with copy relocation. We also
4224 need to make sure that a symbol is referenced locally. */
4225 if (!bfd_link_executable (info) && h)
4227 if (!h->def_regular)
4231 switch (ELF_ST_VISIBILITY (h->other))
4234 v = _("hidden symbol");
4237 v = _("internal symbol");
4240 v = _("protected symbol");
4247 (*_bfd_error_handler)
4248 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
4249 input_bfd, v, h->root.root.string);
4250 bfd_set_error (bfd_error_bad_value);
4253 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
4254 && (h->type == STT_FUNC
4255 || h->type == STT_OBJECT)
4256 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4258 (*_bfd_error_handler)
4259 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
4261 h->type == STT_FUNC ? "function" : "data",
4262 h->root.root.string);
4263 bfd_set_error (bfd_error_bad_value);
4268 /* Note that sgot is not involved in this
4269 calculation. We always want the start of .got.plt. If we
4270 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4271 permitted by the ABI, we might have to change this
4273 relocation -= htab->elf.sgotplt->output_section->vma
4274 + htab->elf.sgotplt->output_offset;
4278 /* Use global offset table as symbol value. */
4279 relocation = htab->elf.sgotplt->output_section->vma
4280 + htab->elf.sgotplt->output_offset;
4281 unresolved_reloc = FALSE;
4285 /* Relocation is to the entry for this symbol in the
4286 procedure linkage table. */
4288 /* Resolve a PLT32 reloc against a local symbol directly,
4289 without using the procedure linkage table. */
4293 if ((h->plt.offset == (bfd_vma) -1
4294 && eh->plt_got.offset == (bfd_vma) -1)
4295 || htab->elf.splt == NULL)
4297 /* We didn't make a PLT entry for this symbol. This
4298 happens when statically linking PIC code, or when
4299 using -Bsymbolic. */
4303 if (h->plt.offset != (bfd_vma) -1)
4305 resolved_plt = htab->elf.splt;
4306 plt_offset = h->plt.offset;
4310 resolved_plt = htab->plt_got;
4311 plt_offset = eh->plt_got.offset;
4314 relocation = (resolved_plt->output_section->vma
4315 + resolved_plt->output_offset
4317 unresolved_reloc = FALSE;
4321 /* Set to symbol size. */
4322 relocation = st_size;
4327 if ((input_section->flags & SEC_ALLOC) == 0
4331 /* Copy dynamic function pointer relocations. Don't generate
4332 dynamic relocations against resolved undefined weak symbols
4333 in PIE, except for R_386_PC32. */
4334 if ((bfd_link_pic (info)
4336 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4337 && (!resolved_to_zero
4338 || r_type == R_386_PC32))
4339 || h->root.type != bfd_link_hash_undefweak))
4340 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
4341 || !SYMBOL_CALLS_LOCAL (info, h)))
4342 || (ELIMINATE_COPY_RELOCS
4343 && !bfd_link_pic (info)
4347 || eh->func_pointer_refcount > 0
4348 || (h->root.type == bfd_link_hash_undefweak
4349 && !resolved_to_zero))
4350 && ((h->def_dynamic && !h->def_regular)
4351 /* Undefined weak symbol is bound locally when
4353 || h->root.type == bfd_link_hash_undefweak)))
4355 Elf_Internal_Rela outrel;
4356 bfd_boolean skip, relocate;
4359 /* When generating a shared object, these relocations
4360 are copied into the output file to be resolved at run
4367 _bfd_elf_section_offset (output_bfd, info, input_section,
4369 if (outrel.r_offset == (bfd_vma) -1)
4371 else if (outrel.r_offset == (bfd_vma) -2)
4372 skip = TRUE, relocate = TRUE;
4373 outrel.r_offset += (input_section->output_section->vma
4374 + input_section->output_offset);
4377 memset (&outrel, 0, sizeof outrel);
4380 && (r_type == R_386_PC32
4381 || !(bfd_link_executable (info)
4382 || SYMBOLIC_BIND (info, h))
4383 || !h->def_regular))
4384 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4387 /* This symbol is local, or marked to become local. */
4389 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4392 sreloc = elf_section_data (input_section)->sreloc;
4394 if (sreloc == NULL || sreloc->contents == NULL)
4396 r = bfd_reloc_notsupported;
4397 goto check_relocation_error;
4400 elf_append_rel (output_bfd, sreloc, &outrel);
4402 /* If this reloc is against an external symbol, we do
4403 not want to fiddle with the addend. Otherwise, we
4404 need to include the symbol value so that it becomes
4405 an addend for the dynamic reloc. */
4412 if (!bfd_link_executable (info))
4414 Elf_Internal_Rela outrel;
4417 outrel.r_offset = rel->r_offset
4418 + input_section->output_section->vma
4419 + input_section->output_offset;
4420 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4421 sreloc = elf_section_data (input_section)->sreloc;
4424 elf_append_rel (output_bfd, sreloc, &outrel);
4429 case R_386_TLS_GOTDESC:
4430 case R_386_TLS_DESC_CALL:
4431 case R_386_TLS_IE_32:
4432 case R_386_TLS_GOTIE:
4433 tls_type = GOT_UNKNOWN;
4434 if (h == NULL && local_got_offsets)
4435 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
4437 tls_type = elf_i386_hash_entry(h)->tls_type;
4438 if (tls_type == GOT_TLS_IE)
4439 tls_type = GOT_TLS_IE_NEG;
4441 if (! elf_i386_tls_transition (info, input_bfd,
4442 input_section, contents,
4443 symtab_hdr, sym_hashes,
4444 &r_type, tls_type, rel,
4445 relend, h, r_symndx, TRUE))
4448 if (r_type == R_386_TLS_LE_32)
4450 BFD_ASSERT (! unresolved_reloc);
4451 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4456 /* GD->LE transition. */
4457 type = *(contents + rel->r_offset - 2);
4461 leal foo@tlsgd(,%ebx,1), %eax
4462 call ___tls_get_addr@PLT
4465 subl $foo@tpoff, %eax
4466 (6 byte form of subl). */
4467 roff = rel->r_offset + 5;
4472 leal foo@tlsgd(%ebx), %eax
4473 call ___tls_get_addr@PLT
4476 leal foo@tlsgd(%reg), %eax
4477 call *___tls_get_addr@GOT(%reg)
4478 which may be converted to
4479 addr32 call ___tls_get_addr
4481 movl %gs:0, %eax; subl $foo@tpoff, %eax
4482 (6 byte form of subl). */
4483 roff = rel->r_offset + 6;
4485 memcpy (contents + roff - 8,
4486 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4487 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4489 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
4494 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4496 /* GDesc -> LE transition.
4497 It's originally something like:
4498 leal x@tlsdesc(%ebx), %eax
4502 Registers other than %eax may be set up here. */
4507 roff = rel->r_offset;
4508 val = bfd_get_8 (input_bfd, contents + roff - 1);
4510 /* Now modify the instruction as appropriate. */
4511 /* aoliva FIXME: remove the above and xor the byte
4513 bfd_put_8 (output_bfd, val ^ 0x86,
4514 contents + roff - 1);
4515 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4519 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4521 /* GDesc -> LE transition.
4529 roff = rel->r_offset;
4530 bfd_put_8 (output_bfd, 0x66, contents + roff);
4531 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4534 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4538 /* IE->LE transition:
4539 Originally it can be one of:
4547 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4550 /* movl foo, %eax. */
4551 bfd_put_8 (output_bfd, 0xb8,
4552 contents + rel->r_offset - 1);
4558 type = bfd_get_8 (input_bfd,
4559 contents + rel->r_offset - 2);
4564 bfd_put_8 (output_bfd, 0xc7,
4565 contents + rel->r_offset - 2);
4566 bfd_put_8 (output_bfd,
4567 0xc0 | ((val >> 3) & 7),
4568 contents + rel->r_offset - 1);
4572 bfd_put_8 (output_bfd, 0x81,
4573 contents + rel->r_offset - 2);
4574 bfd_put_8 (output_bfd,
4575 0xc0 | ((val >> 3) & 7),
4576 contents + rel->r_offset - 1);
4583 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4584 contents + rel->r_offset);
4589 unsigned int val, type;
4591 /* {IE_32,GOTIE}->LE transition:
4592 Originally it can be one of:
4593 subl foo(%reg1), %reg2
4594 movl foo(%reg1), %reg2
4595 addl foo(%reg1), %reg2
4598 movl $foo, %reg2 (6 byte form)
4599 addl $foo, %reg2. */
4600 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4601 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4605 bfd_put_8 (output_bfd, 0xc7,
4606 contents + rel->r_offset - 2);
4607 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4608 contents + rel->r_offset - 1);
4610 else if (type == 0x2b)
4613 bfd_put_8 (output_bfd, 0x81,
4614 contents + rel->r_offset - 2);
4615 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4616 contents + rel->r_offset - 1);
4618 else if (type == 0x03)
4621 bfd_put_8 (output_bfd, 0x81,
4622 contents + rel->r_offset - 2);
4623 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4624 contents + rel->r_offset - 1);
4628 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4629 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4630 contents + rel->r_offset);
4632 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4633 contents + rel->r_offset);
4638 if (htab->elf.sgot == NULL)
4643 off = h->got.offset;
4644 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4648 if (local_got_offsets == NULL)
4651 off = local_got_offsets[r_symndx];
4652 offplt = local_tlsdesc_gotents[r_symndx];
4659 Elf_Internal_Rela outrel;
4663 if (htab->elf.srelgot == NULL)
4666 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4668 if (GOT_TLS_GDESC_P (tls_type))
4671 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4672 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4673 <= htab->elf.sgotplt->size);
4674 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4675 + htab->elf.sgotplt->output_offset
4677 + htab->sgotplt_jump_table_size);
4678 sreloc = htab->elf.srelplt;
4679 loc = sreloc->contents;
4680 loc += (htab->next_tls_desc_index++
4681 * sizeof (Elf32_External_Rel));
4682 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4683 <= sreloc->contents + sreloc->size);
4684 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4687 BFD_ASSERT (! unresolved_reloc);
4688 bfd_put_32 (output_bfd,
4689 relocation - elf_i386_dtpoff_base (info),
4690 htab->elf.sgotplt->contents + offplt
4691 + htab->sgotplt_jump_table_size + 4);
4695 bfd_put_32 (output_bfd, 0,
4696 htab->elf.sgotplt->contents + offplt
4697 + htab->sgotplt_jump_table_size + 4);
4701 sreloc = htab->elf.srelgot;
4703 outrel.r_offset = (htab->elf.sgot->output_section->vma
4704 + htab->elf.sgot->output_offset + off);
4706 if (GOT_TLS_GD_P (tls_type))
4707 dr_type = R_386_TLS_DTPMOD32;
4708 else if (GOT_TLS_GDESC_P (tls_type))
4710 else if (tls_type == GOT_TLS_IE_POS)
4711 dr_type = R_386_TLS_TPOFF;
4713 dr_type = R_386_TLS_TPOFF32;
4715 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4716 bfd_put_32 (output_bfd,
4717 relocation - elf_i386_dtpoff_base (info),
4718 htab->elf.sgot->contents + off);
4719 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4720 bfd_put_32 (output_bfd,
4721 elf_i386_dtpoff_base (info) - relocation,
4722 htab->elf.sgot->contents + off);
4723 else if (dr_type != R_386_TLS_DESC)
4724 bfd_put_32 (output_bfd, 0,
4725 htab->elf.sgot->contents + off);
4726 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4728 elf_append_rel (output_bfd, sreloc, &outrel);
4730 if (GOT_TLS_GD_P (tls_type))
4734 BFD_ASSERT (! unresolved_reloc);
4735 bfd_put_32 (output_bfd,
4736 relocation - elf_i386_dtpoff_base (info),
4737 htab->elf.sgot->contents + off + 4);
4741 bfd_put_32 (output_bfd, 0,
4742 htab->elf.sgot->contents + off + 4);
4743 outrel.r_info = ELF32_R_INFO (indx,
4744 R_386_TLS_DTPOFF32);
4745 outrel.r_offset += 4;
4746 elf_append_rel (output_bfd, sreloc, &outrel);
4749 else if (tls_type == GOT_TLS_IE_BOTH)
4751 bfd_put_32 (output_bfd,
4753 ? relocation - elf_i386_dtpoff_base (info)
4755 htab->elf.sgot->contents + off + 4);
4756 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4757 outrel.r_offset += 4;
4758 elf_append_rel (output_bfd, sreloc, &outrel);
4765 local_got_offsets[r_symndx] |= 1;
4768 if (off >= (bfd_vma) -2
4769 && ! GOT_TLS_GDESC_P (tls_type))
4771 if (r_type == R_386_TLS_GOTDESC
4772 || r_type == R_386_TLS_DESC_CALL)
4774 relocation = htab->sgotplt_jump_table_size + offplt;
4775 unresolved_reloc = FALSE;
4777 else if (r_type == ELF32_R_TYPE (rel->r_info))
4779 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4780 + htab->elf.sgotplt->output_offset;
4781 relocation = htab->elf.sgot->output_section->vma
4782 + htab->elf.sgot->output_offset + off - g_o_t;
4783 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4784 && tls_type == GOT_TLS_IE_BOTH)
4786 if (r_type == R_386_TLS_IE)
4787 relocation += g_o_t;
4788 unresolved_reloc = FALSE;
4790 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4792 unsigned int val, type;
4795 /* GD->IE transition. */
4796 type = *(contents + rel->r_offset - 2);
4797 val = *(contents + rel->r_offset - 1);
4801 leal foo@tlsgd(,%ebx,1), %eax
4802 call ___tls_get_addr@PLT
4805 subl $foo@gottpoff(%ebx), %eax. */
4807 roff = rel->r_offset - 3;
4812 leal foo@tlsgd(%ebx), %eax
4813 call ___tls_get_addr@PLT
4816 leal foo@tlsgd(%reg), %eax
4817 call *___tls_get_addr@GOT(%reg)
4818 which may be converted to
4819 addr32 call ___tls_get_addr
4822 subl $foo@gottpoff(%reg), %eax. */
4823 roff = rel->r_offset - 2;
4825 memcpy (contents + roff,
4826 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4827 contents[roff + 7] = 0x80 | (val & 7);
4828 /* If foo is used only with foo@gotntpoff(%reg) and
4829 foo@indntpoff, but not with foo@gottpoff(%reg), change
4830 subl $foo@gottpoff(%reg), %eax
4832 addl $foo@gotntpoff(%reg), %eax. */
4833 if (tls_type == GOT_TLS_IE_POS)
4834 contents[roff + 6] = 0x03;
4835 bfd_put_32 (output_bfd,
4836 htab->elf.sgot->output_section->vma
4837 + htab->elf.sgot->output_offset + off
4838 - htab->elf.sgotplt->output_section->vma
4839 - htab->elf.sgotplt->output_offset,
4840 contents + roff + 8);
4841 /* Skip R_386_PLT32 and R_386_GOT32X. */
4846 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4848 /* GDesc -> IE transition.
4849 It's originally something like:
4850 leal x@tlsdesc(%ebx), %eax
4853 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4855 movl x@gottpoff(%ebx), %eax # before negl %eax
4857 Registers other than %eax may be set up here. */
4861 /* First, make sure it's a leal adding ebx to a 32-bit
4862 offset into any register, although it's probably
4863 almost always going to be eax. */
4864 roff = rel->r_offset;
4866 /* Now modify the instruction as appropriate. */
4867 /* To turn a leal into a movl in the form we use it, it
4868 suffices to change the first byte from 0x8d to 0x8b.
4869 aoliva FIXME: should we decide to keep the leal, all
4870 we have to do is remove the statement below, and
4871 adjust the relaxation of R_386_TLS_DESC_CALL. */
4872 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4874 if (tls_type == GOT_TLS_IE_BOTH)
4877 bfd_put_32 (output_bfd,
4878 htab->elf.sgot->output_section->vma
4879 + htab->elf.sgot->output_offset + off
4880 - htab->elf.sgotplt->output_section->vma
4881 - htab->elf.sgotplt->output_offset,
4885 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4887 /* GDesc -> IE transition.
4895 depending on how we transformed the TLS_GOTDESC above.
4900 roff = rel->r_offset;
4902 /* Now modify the instruction as appropriate. */
4903 if (tls_type != GOT_TLS_IE_NEG)
4906 bfd_put_8 (output_bfd, 0x66, contents + roff);
4907 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4912 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4913 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4923 if (! elf_i386_tls_transition (info, input_bfd,
4924 input_section, contents,
4925 symtab_hdr, sym_hashes,
4926 &r_type, GOT_UNKNOWN, rel,
4927 relend, h, r_symndx, TRUE))
4930 if (r_type != R_386_TLS_LDM)
4932 /* LD->LE transition. Change
4933 leal foo@tlsldm(%ebx) %eax
4934 call ___tls_get_addr@PLT
4938 leal 0(%esi,1), %esi
4940 leal foo@tlsldm(%reg) %eax
4941 call *___tls_get_addr@GOT(%reg)
4942 which may be converted to
4943 addr32 call ___tls_get_addr
4946 leal 0(%esi), %esi */
4947 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4948 if (*(contents + rel->r_offset + 4) == 0xff
4949 || *(contents + rel->r_offset + 4) == 0x67)
4950 memcpy (contents + rel->r_offset - 2,
4951 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
4953 memcpy (contents + rel->r_offset - 2,
4954 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4955 /* Skip R_386_PC32/R_386_PLT32. */
4961 if (htab->elf.sgot == NULL)
4964 off = htab->tls_ldm_got.offset;
4969 Elf_Internal_Rela outrel;
4971 if (htab->elf.srelgot == NULL)
4974 outrel.r_offset = (htab->elf.sgot->output_section->vma
4975 + htab->elf.sgot->output_offset + off);
4977 bfd_put_32 (output_bfd, 0,
4978 htab->elf.sgot->contents + off);
4979 bfd_put_32 (output_bfd, 0,
4980 htab->elf.sgot->contents + off + 4);
4981 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4982 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4983 htab->tls_ldm_got.offset |= 1;
4985 relocation = htab->elf.sgot->output_section->vma
4986 + htab->elf.sgot->output_offset + off
4987 - htab->elf.sgotplt->output_section->vma
4988 - htab->elf.sgotplt->output_offset;
4989 unresolved_reloc = FALSE;
4992 case R_386_TLS_LDO_32:
4993 if (!bfd_link_executable (info)
4994 || (input_section->flags & SEC_CODE) == 0)
4995 relocation -= elf_i386_dtpoff_base (info);
4997 /* When converting LDO to LE, we must negate. */
4998 relocation = -elf_i386_tpoff (info, relocation);
5001 case R_386_TLS_LE_32:
5003 if (!bfd_link_executable (info))
5005 Elf_Internal_Rela outrel;
5008 outrel.r_offset = rel->r_offset
5009 + input_section->output_section->vma
5010 + input_section->output_offset;
5011 if (h != NULL && h->dynindx != -1)
5015 if (r_type == R_386_TLS_LE_32)
5016 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
5018 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
5019 sreloc = elf_section_data (input_section)->sreloc;
5022 elf_append_rel (output_bfd, sreloc, &outrel);
5025 else if (r_type == R_386_TLS_LE_32)
5026 relocation = elf_i386_dtpoff_base (info) - relocation;
5028 relocation -= elf_i386_dtpoff_base (info);
5030 else if (r_type == R_386_TLS_LE_32)
5031 relocation = elf_i386_tpoff (info, relocation);
5033 relocation = -elf_i386_tpoff (info, relocation);
5040 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5041 because such sections are not SEC_ALLOC and thus ld.so will
5042 not process them. */
5043 if (unresolved_reloc
5044 && !((input_section->flags & SEC_DEBUGGING) != 0
5046 && _bfd_elf_section_offset (output_bfd, info, input_section,
5047 rel->r_offset) != (bfd_vma) -1)
5049 (*_bfd_error_handler)
5050 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5053 (long) rel->r_offset,
5055 h->root.root.string);
5060 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5061 contents, rel->r_offset,
5064 check_relocation_error:
5065 if (r != bfd_reloc_ok)
5070 name = h->root.root.string;
5073 name = bfd_elf_string_from_elf_section (input_bfd,
5074 symtab_hdr->sh_link,
5079 name = bfd_section_name (input_bfd, sec);
5082 if (r == bfd_reloc_overflow)
5083 (*info->callbacks->reloc_overflow)
5084 (info, (h ? &h->root : NULL), name, howto->name,
5085 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5088 (*_bfd_error_handler)
5089 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5090 input_bfd, input_section,
5091 (long) rel->r_offset, name, (int) r);
5102 Elf_Internal_Shdr *rel_hdr;
5103 size_t deleted = rel - wrel;
5105 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5106 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5107 if (rel_hdr->sh_size == 0)
5109 /* It is too late to remove an empty reloc section. Leave
5111 ??? What is wrong with an empty section??? */
5112 rel_hdr->sh_size = rel_hdr->sh_entsize;
5115 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5116 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5117 input_section->reloc_count -= deleted;
5123 /* Finish up dynamic symbol handling. We set the contents of various
5124 dynamic sections here. */
5127 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
5128 struct bfd_link_info *info,
5129 struct elf_link_hash_entry *h,
5130 Elf_Internal_Sym *sym)
5132 struct elf_i386_link_hash_table *htab;
5133 unsigned plt_entry_size;
5134 const struct elf_i386_backend_data *abed;
5135 struct elf_i386_link_hash_entry *eh;
5136 bfd_boolean local_undefweak;
5138 htab = elf_i386_hash_table (info);
5142 abed = get_elf_i386_backend_data (output_bfd);
5143 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
5145 eh = (struct elf_i386_link_hash_entry *) h;
5147 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5148 resolved undefined weak symbols in executable so that their
5149 references have value 0 at run-time. */
5150 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
5154 if (h->plt.offset != (bfd_vma) -1)
5158 Elf_Internal_Rela rel;
5160 asection *plt, *gotplt, *relplt;
5162 /* When building a static executable, use .iplt, .igot.plt and
5163 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5164 if (htab->elf.splt != NULL)
5166 plt = htab->elf.splt;
5167 gotplt = htab->elf.sgotplt;
5168 relplt = htab->elf.srelplt;
5172 plt = htab->elf.iplt;
5173 gotplt = htab->elf.igotplt;
5174 relplt = htab->elf.irelplt;
5177 /* This symbol has an entry in the procedure linkage table. Set
5180 if ((h->dynindx == -1
5182 && !((h->forced_local || bfd_link_executable (info))
5184 && h->type == STT_GNU_IFUNC))
5190 /* Get the index in the procedure linkage table which
5191 corresponds to this symbol. This is the index of this symbol
5192 in all the symbols for which we are making plt entries. The
5193 first entry in the procedure linkage table is reserved.
5195 Get the offset into the .got table of the entry that
5196 corresponds to this function. Each .got entry is 4 bytes.
5197 The first three are reserved.
5199 For static executables, we don't reserve anything. */
5201 if (plt == htab->elf.splt)
5203 got_offset = h->plt.offset / plt_entry_size - 1;
5204 got_offset = (got_offset + 3) * 4;
5208 got_offset = h->plt.offset / plt_entry_size;
5209 got_offset = got_offset * 4;
5212 /* Fill in the entry in the procedure linkage table. */
5213 if (! bfd_link_pic (info))
5215 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
5216 abed->plt->plt_entry_size);
5217 bfd_put_32 (output_bfd,
5218 (gotplt->output_section->vma
5219 + gotplt->output_offset
5221 plt->contents + h->plt.offset
5222 + abed->plt->plt_got_offset);
5224 if (abed->is_vxworks)
5226 int s, k, reloc_index;
5228 /* Create the R_386_32 relocation referencing the GOT
5229 for this PLT entry. */
5231 /* S: Current slot number (zero-based). */
5232 s = ((h->plt.offset - abed->plt->plt_entry_size)
5233 / abed->plt->plt_entry_size);
5234 /* K: Number of relocations for PLTResolve. */
5235 if (bfd_link_pic (info))
5236 k = PLTRESOLVE_RELOCS_SHLIB;
5238 k = PLTRESOLVE_RELOCS;
5239 /* Skip the PLTresolve relocations, and the relocations for
5240 the other PLT slots. */
5241 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
5242 loc = (htab->srelplt2->contents + reloc_index
5243 * sizeof (Elf32_External_Rel));
5245 rel.r_offset = (htab->elf.splt->output_section->vma
5246 + htab->elf.splt->output_offset
5247 + h->plt.offset + 2),
5248 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5249 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5251 /* Create the R_386_32 relocation referencing the beginning of
5252 the PLT for this GOT entry. */
5253 rel.r_offset = (htab->elf.sgotplt->output_section->vma
5254 + htab->elf.sgotplt->output_offset
5256 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5257 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5258 loc + sizeof (Elf32_External_Rel));
5263 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
5264 abed->plt->plt_entry_size);
5265 bfd_put_32 (output_bfd, got_offset,
5266 plt->contents + h->plt.offset
5267 + abed->plt->plt_got_offset);
5270 /* Fill in the entry in the global offset table. Leave the entry
5271 as zero for undefined weak symbol in PIE. No PLT relocation
5272 against undefined weak symbol in PIE. */
5273 if (!local_undefweak)
5275 bfd_put_32 (output_bfd,
5276 (plt->output_section->vma
5277 + plt->output_offset
5279 + abed->plt->plt_lazy_offset),
5280 gotplt->contents + got_offset);
5282 /* Fill in the entry in the .rel.plt section. */
5283 rel.r_offset = (gotplt->output_section->vma
5284 + gotplt->output_offset
5286 if (h->dynindx == -1
5287 || ((bfd_link_executable (info)
5288 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5290 && h->type == STT_GNU_IFUNC))
5292 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5293 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5294 in the .got.plt section. */
5295 bfd_put_32 (output_bfd,
5296 (h->root.u.def.value
5297 + h->root.u.def.section->output_section->vma
5298 + h->root.u.def.section->output_offset),
5299 gotplt->contents + got_offset);
5300 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5301 /* R_386_IRELATIVE comes last. */
5302 plt_index = htab->next_irelative_index--;
5306 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
5307 plt_index = htab->next_jump_slot_index++;
5310 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
5311 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5313 /* Don't fill PLT entry for static executables. */
5314 if (plt == htab->elf.splt)
5316 bfd_put_32 (output_bfd,
5317 plt_index * sizeof (Elf32_External_Rel),
5318 plt->contents + h->plt.offset
5319 + abed->plt->plt_reloc_offset);
5320 bfd_put_32 (output_bfd, - (h->plt.offset
5321 + abed->plt->plt_plt_offset + 4),
5322 plt->contents + h->plt.offset
5323 + abed->plt->plt_plt_offset);
5327 else if (eh->plt_got.offset != (bfd_vma) -1)
5329 bfd_vma got_offset, plt_offset;
5330 asection *plt, *got, *gotplt;
5331 const bfd_byte *got_plt_entry;
5333 /* Offset of displacement of the indirect jump. */
5334 bfd_vma plt_got_offset = 2;
5336 /* Set the entry in the GOT procedure linkage table. */
5337 plt = htab->plt_got;
5338 got = htab->elf.sgot;
5339 gotplt = htab->elf.sgotplt;
5340 got_offset = h->got.offset;
5342 if (got_offset == (bfd_vma) -1
5348 /* Fill in the entry in the GOT procedure linkage table. */
5349 if (! bfd_link_pic (info))
5351 got_plt_entry = elf_i386_got_plt_entry;
5352 got_offset += got->output_section->vma + got->output_offset;
5356 got_plt_entry = elf_i386_pic_got_plt_entry;
5357 got_offset += (got->output_section->vma
5358 + got->output_offset
5359 - gotplt->output_section->vma
5360 - gotplt->output_offset);
5363 plt_offset = eh->plt_got.offset;
5364 memcpy (plt->contents + plt_offset, got_plt_entry,
5365 sizeof (elf_i386_got_plt_entry));
5366 bfd_put_32 (output_bfd, got_offset,
5367 plt->contents + plt_offset + plt_got_offset);
5370 if (!local_undefweak
5372 && (h->plt.offset != (bfd_vma) -1
5373 || eh->plt_got.offset != (bfd_vma) -1))
5375 /* Mark the symbol as undefined, rather than as defined in
5376 the .plt section. Leave the value if there were any
5377 relocations where pointer equality matters (this is a clue
5378 for the dynamic linker, to make function pointer
5379 comparisons work between an application and shared
5380 library), otherwise set it to zero. If a function is only
5381 called from a binary, there is no need to slow down
5382 shared libraries because of that. */
5383 sym->st_shndx = SHN_UNDEF;
5384 if (!h->pointer_equality_needed)
5388 /* Don't generate dynamic GOT relocation against undefined weak
5389 symbol in executable. */
5390 if (h->got.offset != (bfd_vma) -1
5391 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
5392 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
5393 && !local_undefweak)
5395 Elf_Internal_Rela rel;
5397 /* This symbol has an entry in the global offset table. Set it
5400 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
5403 rel.r_offset = (htab->elf.sgot->output_section->vma
5404 + htab->elf.sgot->output_offset
5405 + (h->got.offset & ~(bfd_vma) 1));
5407 /* If this is a static link, or it is a -Bsymbolic link and the
5408 symbol is defined locally or was forced to be local because
5409 of a version file, we just want to emit a RELATIVE reloc.
5410 The entry in the global offset table will already have been
5411 initialized in the relocate_section function. */
5413 && h->type == STT_GNU_IFUNC)
5415 if (bfd_link_pic (info))
5417 /* Generate R_386_GLOB_DAT. */
5424 if (!h->pointer_equality_needed)
5427 /* For non-shared object, we can't use .got.plt, which
5428 contains the real function addres if we need pointer
5429 equality. We load the GOT entry with the PLT entry. */
5430 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
5431 bfd_put_32 (output_bfd,
5432 (plt->output_section->vma
5433 + plt->output_offset + h->plt.offset),
5434 htab->elf.sgot->contents + h->got.offset);
5438 else if (bfd_link_pic (info)
5439 && SYMBOL_REFERENCES_LOCAL (info, h))
5441 BFD_ASSERT((h->got.offset & 1) != 0);
5442 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
5446 BFD_ASSERT((h->got.offset & 1) == 0);
5448 bfd_put_32 (output_bfd, (bfd_vma) 0,
5449 htab->elf.sgot->contents + h->got.offset);
5450 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
5453 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
5458 Elf_Internal_Rela rel;
5460 /* This symbol needs a copy reloc. Set it up. */
5462 if (h->dynindx == -1
5463 || (h->root.type != bfd_link_hash_defined
5464 && h->root.type != bfd_link_hash_defweak)
5465 || htab->srelbss == NULL)
5468 rel.r_offset = (h->root.u.def.value
5469 + h->root.u.def.section->output_section->vma
5470 + h->root.u.def.section->output_offset);
5471 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
5472 elf_append_rel (output_bfd, htab->srelbss, &rel);
5478 /* Finish up local dynamic symbol handling. We set the contents of
5479 various dynamic sections here. */
5482 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5484 struct elf_link_hash_entry *h
5485 = (struct elf_link_hash_entry *) *slot;
5486 struct bfd_link_info *info
5487 = (struct bfd_link_info *) inf;
5489 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5493 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5494 here since undefined weak symbol may not be dynamic and may not be
5495 called for elf_i386_finish_dynamic_symbol. */
5498 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5501 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5502 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5504 if (h->root.type != bfd_link_hash_undefweak
5505 || h->dynindx != -1)
5508 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5512 /* Used to decide how to sort relocs in an optimal manner for the
5513 dynamic linker, before writing them out. */
5515 static enum elf_reloc_type_class
5516 elf_i386_reloc_type_class (const struct bfd_link_info *info,
5517 const asection *rel_sec ATTRIBUTE_UNUSED,
5518 const Elf_Internal_Rela *rela)
5520 bfd *abfd = info->output_bfd;
5521 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5522 struct elf_link_hash_table *htab = elf_hash_table (info);
5524 if (htab->dynsym != NULL
5525 && htab->dynsym->contents != NULL)
5527 /* Check relocation against STT_GNU_IFUNC symbol if there are
5529 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5530 Elf_Internal_Sym sym;
5531 if (!bed->s->swap_symbol_in (abfd,
5532 (htab->dynsym->contents
5533 + r_symndx * sizeof (Elf32_External_Sym)),
5537 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5538 return reloc_class_ifunc;
5541 switch (ELF32_R_TYPE (rela->r_info))
5543 case R_386_RELATIVE:
5544 return reloc_class_relative;
5545 case R_386_JUMP_SLOT:
5546 return reloc_class_plt;
5548 return reloc_class_copy;
5550 return reloc_class_normal;
5554 /* Finish up the dynamic sections. */
5557 elf_i386_finish_dynamic_sections (bfd *output_bfd,
5558 struct bfd_link_info *info)
5560 struct elf_i386_link_hash_table *htab;
5563 const struct elf_i386_backend_data *abed;
5565 htab = elf_i386_hash_table (info);
5569 dynobj = htab->elf.dynobj;
5570 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5571 abed = get_elf_i386_backend_data (output_bfd);
5573 if (htab->elf.dynamic_sections_created)
5575 Elf32_External_Dyn *dyncon, *dynconend;
5577 if (sdyn == NULL || htab->elf.sgot == NULL)
5580 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5581 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5582 for (; dyncon < dynconend; dyncon++)
5584 Elf_Internal_Dyn dyn;
5587 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5592 if (abed->is_vxworks
5593 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5598 s = htab->elf.sgotplt;
5599 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5603 s = htab->elf.srelplt;
5604 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5608 s = htab->elf.srelplt;
5609 dyn.d_un.d_val = s->size;
5613 /* My reading of the SVR4 ABI indicates that the
5614 procedure linkage table relocs (DT_JMPREL) should be
5615 included in the overall relocs (DT_REL). This is
5616 what Solaris does. However, UnixWare can not handle
5617 that case. Therefore, we override the DT_RELSZ entry
5618 here to make it not include the JMPREL relocs. */
5619 s = htab->elf.srelplt;
5622 dyn.d_un.d_val -= s->size;
5626 /* We may not be using the standard ELF linker script.
5627 If .rel.plt is the first .rel section, we adjust
5628 DT_REL to not include it. */
5629 s = htab->elf.srelplt;
5632 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
5634 dyn.d_un.d_ptr += s->size;
5638 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5641 /* Fill in the first entry in the procedure linkage table. */
5642 if (htab->elf.splt && htab->elf.splt->size > 0)
5644 if (bfd_link_pic (info))
5646 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5647 abed->plt->plt0_entry_size);
5648 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5649 abed->plt0_pad_byte,
5650 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5654 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5655 abed->plt->plt0_entry_size);
5656 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5657 abed->plt0_pad_byte,
5658 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5659 bfd_put_32 (output_bfd,
5660 (htab->elf.sgotplt->output_section->vma
5661 + htab->elf.sgotplt->output_offset
5663 htab->elf.splt->contents
5664 + abed->plt->plt0_got1_offset);
5665 bfd_put_32 (output_bfd,
5666 (htab->elf.sgotplt->output_section->vma
5667 + htab->elf.sgotplt->output_offset
5669 htab->elf.splt->contents
5670 + abed->plt->plt0_got2_offset);
5672 if (abed->is_vxworks)
5674 Elf_Internal_Rela rel;
5676 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5677 On IA32 we use REL relocations so the addend goes in
5678 the PLT directly. */
5679 rel.r_offset = (htab->elf.splt->output_section->vma
5680 + htab->elf.splt->output_offset
5681 + abed->plt->plt0_got1_offset);
5682 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5683 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5684 htab->srelplt2->contents);
5685 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5686 rel.r_offset = (htab->elf.splt->output_section->vma
5687 + htab->elf.splt->output_offset
5688 + abed->plt->plt0_got2_offset);
5689 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5690 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5691 htab->srelplt2->contents +
5692 sizeof (Elf32_External_Rel));
5696 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5697 really seem like the right value. */
5698 elf_section_data (htab->elf.splt->output_section)
5699 ->this_hdr.sh_entsize = 4;
5701 /* Correct the .rel.plt.unloaded relocations. */
5702 if (abed->is_vxworks && !bfd_link_pic (info))
5704 int num_plts = (htab->elf.splt->size
5705 / abed->plt->plt_entry_size) - 1;
5708 p = htab->srelplt2->contents;
5709 if (bfd_link_pic (info))
5710 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5712 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5714 for (; num_plts; num_plts--)
5716 Elf_Internal_Rela rel;
5717 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5718 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5719 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5720 p += sizeof (Elf32_External_Rel);
5722 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5723 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5724 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5725 p += sizeof (Elf32_External_Rel);
5731 if (htab->elf.sgotplt)
5733 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5735 (*_bfd_error_handler)
5736 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5740 /* Fill in the first three entries in the global offset table. */
5741 if (htab->elf.sgotplt->size > 0)
5743 bfd_put_32 (output_bfd,
5745 : sdyn->output_section->vma + sdyn->output_offset),
5746 htab->elf.sgotplt->contents);
5747 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5748 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5751 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5754 /* Adjust .eh_frame for .plt section. */
5755 if (htab->plt_eh_frame != NULL
5756 && htab->plt_eh_frame->contents != NULL)
5758 if (htab->elf.splt != NULL
5759 && htab->elf.splt->size != 0
5760 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5761 && htab->elf.splt->output_section != NULL
5762 && htab->plt_eh_frame->output_section != NULL)
5764 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5765 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5766 + htab->plt_eh_frame->output_offset
5767 + PLT_FDE_START_OFFSET;
5768 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5769 htab->plt_eh_frame->contents
5770 + PLT_FDE_START_OFFSET);
5772 if (htab->plt_eh_frame->sec_info_type
5773 == SEC_INFO_TYPE_EH_FRAME)
5775 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5777 htab->plt_eh_frame->contents))
5782 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5783 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5785 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5786 htab_traverse (htab->loc_hash_table,
5787 elf_i386_finish_local_dynamic_symbol,
5790 /* Fill PLT entries for undefined weak symbols in PIE. */
5791 if (bfd_link_pie (info))
5792 bfd_hash_traverse (&info->hash->table,
5793 elf_i386_pie_finish_undefweak_symbol,
5799 /* Return an array of PLT entry symbol values. */
5802 elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5805 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5808 bfd_vma *plt_sym_val;
5810 bfd_byte *plt_contents;
5811 const struct elf_i386_backend_data *bed
5812 = get_elf_i386_backend_data (abfd);
5813 Elf_Internal_Shdr *hdr;
5815 /* Get the .plt section contents. */
5816 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5817 if (plt_contents == NULL)
5819 if (!bfd_get_section_contents (abfd, (asection *) plt,
5820 plt_contents, 0, plt->size))
5823 free (plt_contents);
5827 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5828 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5831 hdr = &elf_section_data (relplt)->this_hdr;
5832 count = relplt->size / hdr->sh_entsize;
5834 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5835 if (plt_sym_val == NULL)
5838 for (i = 0; i < count; i++)
5839 plt_sym_val[i] = -1;
5841 plt_offset = bed->plt->plt_entry_size;
5842 p = relplt->relocation;
5843 for (i = 0; i < count; i++, p++)
5847 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5848 if (p->howto == NULL)
5851 if (p->howto->type != R_386_JUMP_SLOT
5852 && p->howto->type != R_386_IRELATIVE)
5855 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5856 + bed->plt->plt_reloc_offset));
5857 reloc_index /= sizeof (Elf32_External_Rel);
5858 if (reloc_index < count)
5859 plt_sym_val[reloc_index] = plt->vma + plt_offset;
5861 plt_offset += bed->plt->plt_entry_size;
5863 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5865 if (plt_offset >= plt->size)
5869 free (plt_contents);
5874 /* Similar to _bfd_elf_get_synthetic_symtab. */
5877 elf_i386_get_synthetic_symtab (bfd *abfd,
5884 asection *plt = bfd_get_section_by_name (abfd, ".plt");
5885 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5886 dynsymcount, dynsyms, ret,
5888 elf_i386_get_plt_sym_val);
5891 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5894 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5896 if (h->plt.offset != (bfd_vma) -1
5898 && !h->pointer_equality_needed)
5901 return _bfd_elf_hash_symbol (h);
5904 #define TARGET_LITTLE_SYM i386_elf32_vec
5905 #define TARGET_LITTLE_NAME "elf32-i386"
5906 #define ELF_ARCH bfd_arch_i386
5907 #define ELF_TARGET_ID I386_ELF_DATA
5908 #define ELF_MACHINE_CODE EM_386
5909 #define ELF_MAXPAGESIZE 0x1000
5911 #define elf_backend_can_gc_sections 1
5912 #define elf_backend_can_refcount 1
5913 #define elf_backend_want_got_plt 1
5914 #define elf_backend_plt_readonly 1
5915 #define elf_backend_want_plt_sym 0
5916 #define elf_backend_got_header_size 12
5917 #define elf_backend_plt_alignment 4
5918 #define elf_backend_extern_protected_data 1
5919 #define elf_backend_caches_rawsize 1
5921 /* Support RELA for objdump of prelink objects. */
5922 #define elf_info_to_howto elf_i386_info_to_howto_rel
5923 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5925 #define bfd_elf32_mkobject elf_i386_mkobject
5927 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5928 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5929 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5930 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5931 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5933 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5934 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5935 #define elf_backend_check_relocs elf_i386_check_relocs
5936 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5937 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5938 #define elf_backend_fake_sections elf_i386_fake_sections
5939 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5940 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5941 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5942 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5943 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5944 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5945 #define elf_backend_relocate_section elf_i386_relocate_section
5946 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5947 #define elf_backend_always_size_sections elf_i386_always_size_sections
5948 #define elf_backend_omit_section_dynsym \
5949 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5950 #define elf_backend_hash_symbol elf_i386_hash_symbol
5951 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
5953 #include "elf32-target.h"
5955 /* FreeBSD support. */
5957 #undef TARGET_LITTLE_SYM
5958 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5959 #undef TARGET_LITTLE_NAME
5960 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5962 #define ELF_OSABI ELFOSABI_FREEBSD
5964 /* The kernel recognizes executables as valid only if they carry a
5965 "FreeBSD" label in the ELF header. So we put this label on all
5966 executables and (for simplicity) also all other object files. */
5969 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
5971 _bfd_elf_post_process_headers (abfd, info);
5973 #ifdef OLD_FREEBSD_ABI_LABEL
5975 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5976 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
5977 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5982 #undef elf_backend_post_process_headers
5983 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5985 #define elf32_bed elf32_i386_fbsd_bed
5987 #undef elf_backend_add_symbol_hook
5989 #include "elf32-target.h"
5993 #undef TARGET_LITTLE_SYM
5994 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5995 #undef TARGET_LITTLE_NAME
5996 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5998 #undef elf_backend_post_process_headers
6000 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6001 objects won't be recognized. */
6005 #define elf32_bed elf32_i386_sol2_bed
6007 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6009 #undef elf_backend_static_tls_alignment
6010 #define elf_backend_static_tls_alignment 8
6012 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6014 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6016 #undef elf_backend_want_plt_sym
6017 #define elf_backend_want_plt_sym 1
6019 #undef elf_backend_strtab_flags
6020 #define elf_backend_strtab_flags SHF_STRINGS
6022 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
6023 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
6024 FALSE otherwise. ISECTION is the best guess matching section from the
6025 input bfd IBFD, but it might be NULL. */
6028 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
6029 bfd *obfd ATTRIBUTE_UNUSED,
6030 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
6031 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
6033 /* PR 19938: FIXME: Need to add code for setting the sh_info
6034 and sh_link fields of Solaris specific section types. */
6037 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
6038 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
6040 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
6042 The following values should be set:
6045 -----------------------------------------------------------------------------
6046 SHT_SUNW_ancillary The section header index of 0
6047 [0x6fffffee] the associated string table.
6049 SHT_SUNW_capinfo The section header index of For a dynamic object, the
6050 [0x6ffffff0] the associated symbol table. section header index of
6052 SHT_SUNW_capchain table,
6055 SHT_SUNW_symsort The section header index of 0
6056 [0x6ffffff1] the associated symbol table.
6058 SHT_SUNW_tlssort The section header index of 0
6059 [0x6ffffff2] the associated symbol table.
6061 SHT_SUNW_LDYNSYM The section header index of One greater than the
6062 [0x6ffffff3] the associated string table. symbol table index of the
6063 This index is the same string last local symbol,
6064 table used by the SHT_DYNSYM STB_LOCAL. Since
6065 section. SHT_SUNW_LDYNSYM only
6066 contains local symbols,
6067 sh_info is equivalent to
6068 the number of symbols in
6071 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
6072 [0x6ffffff5] the section header index of to named strings, the
6073 the associated section header index of
6074 SHT_SUNW_capinfo table, the associated string
6075 otherwise 0. table, otherwise 0.
6077 SHT_SUNW_move The section header index of 0
6078 [0x6ffffffa] the associated symbol table.
6083 SHT_SUNW_syminfo The section header index of The section header index
6084 [0x6ffffffc] the associated symbol table. of the associated
6087 SHT_SUNW_verdef The section header index of The number of version
6088 [0x6ffffffd] the associated string table. definitions within the
6091 SHT_SUNW_verneed The section header index of The number of version
6092 [0x6ffffffe] the associated string table. dependencies within the
6095 SHT_SUNW_versym The section header index of 0
6096 [0x6fffffff] the associated symbol table. */
6099 #undef elf_backend_copy_special_section_fields
6100 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
6102 #include "elf32-target.h"
6104 /* Intel MCU support. */
6107 elf32_iamcu_elf_object_p (bfd *abfd)
6109 /* Set the right machine number for an IAMCU elf32 file. */
6110 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
6114 #undef TARGET_LITTLE_SYM
6115 #define TARGET_LITTLE_SYM iamcu_elf32_vec
6116 #undef TARGET_LITTLE_NAME
6117 #define TARGET_LITTLE_NAME "elf32-iamcu"
6119 #define ELF_ARCH bfd_arch_iamcu
6121 #undef ELF_MACHINE_CODE
6122 #define ELF_MACHINE_CODE EM_IAMCU
6127 #define elf32_bed elf32_iamcu_bed
6129 #undef elf_backend_object_p
6130 #define elf_backend_object_p elf32_iamcu_elf_object_p
6132 #undef elf_backend_static_tls_alignment
6134 #undef elf_backend_want_plt_sym
6135 #define elf_backend_want_plt_sym 0
6137 #undef elf_backend_strtab_flags
6138 #undef elf_backend_copy_special_section_fields
6140 #include "elf32-target.h"
6142 /* Restore defaults. */
6144 #define ELF_ARCH bfd_arch_i386
6145 #undef ELF_MACHINE_CODE
6146 #define ELF_MACHINE_CODE EM_386
6148 /* Native Client support. */
6150 #undef TARGET_LITTLE_SYM
6151 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
6152 #undef TARGET_LITTLE_NAME
6153 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
6155 #define elf32_bed elf32_i386_nacl_bed
6157 #undef ELF_MAXPAGESIZE
6158 #define ELF_MAXPAGESIZE 0x10000
6160 /* Restore defaults. */
6162 #undef elf_backend_want_plt_sym
6163 #define elf_backend_want_plt_sym 0
6164 #undef elf_backend_post_process_headers
6165 #undef elf_backend_static_tls_alignment
6167 /* NaCl uses substantially different PLT entries for the same effects. */
6169 #undef elf_backend_plt_alignment
6170 #define elf_backend_plt_alignment 5
6171 #define NACL_PLT_ENTRY_SIZE 64
6172 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6174 static const bfd_byte elf_i386_nacl_plt0_entry[] =
6176 0xff, 0x35, /* pushl contents of address */
6177 0, 0, 0, 0, /* replaced with address of .got + 4. */
6178 0x8b, 0x0d, /* movl contents of address, %ecx */
6179 0, 0, 0, 0, /* replaced with address of .got + 8. */
6180 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6181 0xff, 0xe1 /* jmp *%ecx */
6184 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6186 0x8b, 0x0d, /* movl contents of address, %ecx */
6187 0, 0, 0, 0, /* replaced with GOT slot address. */
6188 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6189 0xff, 0xe1, /* jmp *%ecx */
6191 /* Pad to the next 32-byte boundary with nop instructions. */
6193 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6194 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6196 /* Lazy GOT entries point here (32-byte aligned). */
6197 0x68, /* pushl immediate */
6198 0, 0, 0, 0, /* replaced with reloc offset. */
6199 0xe9, /* jmp relative */
6200 0, 0, 0, 0, /* replaced with offset to .plt. */
6202 /* Pad to the next 32-byte boundary with nop instructions. */
6203 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6204 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6208 static const bfd_byte
6209 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
6211 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6212 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6213 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6214 0xff, 0xe1, /* jmp *%ecx */
6216 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6217 so pad to that size with nop instructions. */
6218 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
6221 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
6223 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6224 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6225 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6226 0xff, 0xe1, /* jmp *%ecx */
6228 /* Pad to the next 32-byte boundary with nop instructions. */
6230 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6231 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6233 /* Lazy GOT entries point here (32-byte aligned). */
6234 0x68, /* pushl immediate */
6235 0, 0, 0, 0, /* replaced with offset into relocation table. */
6236 0xe9, /* jmp relative */
6237 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6239 /* Pad to the next 32-byte boundary with nop instructions. */
6240 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6241 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6245 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
6247 #if (PLT_CIE_LENGTH != 20 \
6248 || PLT_FDE_LENGTH != 36 \
6249 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6250 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6251 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
6253 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6254 0, 0, 0, 0, /* CIE ID */
6255 1, /* CIE version */
6256 'z', 'R', 0, /* Augmentation string */
6257 1, /* Code alignment factor */
6258 0x7c, /* Data alignment factor: -4 */
6259 8, /* Return address column */
6260 1, /* Augmentation size */
6261 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6262 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
6263 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
6264 DW_CFA_nop, DW_CFA_nop,
6266 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6267 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
6268 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
6269 0, 0, 0, 0, /* .plt size goes here */
6270 0, /* Augmentation size */
6271 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
6272 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6273 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
6274 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6275 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6276 13, /* Block length */
6277 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
6278 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
6279 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6280 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
6281 DW_CFA_nop, DW_CFA_nop
6284 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
6286 elf_i386_nacl_plt0_entry, /* plt0_entry */
6287 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
6288 2, /* plt0_got1_offset */
6289 8, /* plt0_got2_offset */
6290 elf_i386_nacl_plt_entry, /* plt_entry */
6291 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6292 2, /* plt_got_offset */
6293 33, /* plt_reloc_offset */
6294 38, /* plt_plt_offset */
6295 32, /* plt_lazy_offset */
6296 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6297 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6298 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
6299 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
6302 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6304 &elf_i386_nacl_plt, /* plt */
6305 0x90, /* plt0_pad_byte: nop insn */
6310 elf32_i386_nacl_elf_object_p (bfd *abfd)
6312 /* Set the right machine number for a NaCl i386 ELF32 file. */
6313 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6317 #undef elf_backend_arch_data
6318 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6320 #undef elf_backend_object_p
6321 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6322 #undef elf_backend_modify_segment_map
6323 #define elf_backend_modify_segment_map nacl_modify_segment_map
6324 #undef elf_backend_modify_program_headers
6325 #define elf_backend_modify_program_headers nacl_modify_program_headers
6326 #undef elf_backend_final_write_processing
6327 #define elf_backend_final_write_processing nacl_final_write_processing
6329 #include "elf32-target.h"
6331 /* Restore defaults. */
6332 #undef elf_backend_object_p
6333 #undef elf_backend_modify_segment_map
6334 #undef elf_backend_modify_program_headers
6335 #undef elf_backend_final_write_processing
6337 /* VxWorks support. */
6339 #undef TARGET_LITTLE_SYM
6340 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6341 #undef TARGET_LITTLE_NAME
6342 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6344 #undef elf_backend_plt_alignment
6345 #define elf_backend_plt_alignment 4
6347 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6349 &elf_i386_plt, /* plt */
6350 0x90, /* plt0_pad_byte */
6354 #undef elf_backend_arch_data
6355 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6357 #undef elf_backend_relocs_compatible
6358 #undef elf_backend_add_symbol_hook
6359 #define elf_backend_add_symbol_hook \
6360 elf_vxworks_add_symbol_hook
6361 #undef elf_backend_link_output_symbol_hook
6362 #define elf_backend_link_output_symbol_hook \
6363 elf_vxworks_link_output_symbol_hook
6364 #undef elf_backend_emit_relocs
6365 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6366 #undef elf_backend_final_write_processing
6367 #define elf_backend_final_write_processing \
6368 elf_vxworks_final_write_processing
6369 #undef elf_backend_static_tls_alignment
6371 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6373 #undef elf_backend_want_plt_sym
6374 #define elf_backend_want_plt_sym 1
6377 #define elf32_bed elf32_i386_vxworks_bed
6379 #include "elf32-target.h"