Upgrade GDB from 7.4.1 to 7.6.1 on the vendor branch
[dragonfly.git] / contrib / gdb-7 / bfd / elf32-i386.c
CommitLineData
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1/* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
ef5ccd6c 3 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
a45ae5f8 4 Free Software Foundation, Inc.
5796c8dc
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5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
22
23#include "sysdep.h"
24#include "bfd.h"
25#include "bfdlink.h"
26#include "libbfd.h"
27#include "elf-bfd.h"
ef5ccd6c 28#include "elf-nacl.h"
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29#include "elf-vxworks.h"
30#include "bfd_stdint.h"
31#include "objalloc.h"
32#include "hashtab.h"
a45ae5f8 33#include "dwarf2.h"
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34
35/* 386 uses REL relocations instead of RELA. */
36#define USE_REL 1
37
38#include "elf/i386.h"
39
40static reloc_howto_type elf_howto_table[]=
41{
42 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
43 bfd_elf_generic_reloc, "R_386_NONE",
44 TRUE, 0x00000000, 0x00000000, FALSE),
45 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
46 bfd_elf_generic_reloc, "R_386_32",
47 TRUE, 0xffffffff, 0xffffffff, FALSE),
48 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
49 bfd_elf_generic_reloc, "R_386_PC32",
50 TRUE, 0xffffffff, 0xffffffff, TRUE),
51 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
52 bfd_elf_generic_reloc, "R_386_GOT32",
53 TRUE, 0xffffffff, 0xffffffff, FALSE),
54 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
55 bfd_elf_generic_reloc, "R_386_PLT32",
56 TRUE, 0xffffffff, 0xffffffff, TRUE),
57 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
58 bfd_elf_generic_reloc, "R_386_COPY",
59 TRUE, 0xffffffff, 0xffffffff, FALSE),
60 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
62 TRUE, 0xffffffff, 0xffffffff, FALSE),
63 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
65 TRUE, 0xffffffff, 0xffffffff, FALSE),
66 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_386_RELATIVE",
68 TRUE, 0xffffffff, 0xffffffff, FALSE),
69 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_386_GOTOFF",
71 TRUE, 0xffffffff, 0xffffffff, FALSE),
72 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_386_GOTPC",
74 TRUE, 0xffffffff, 0xffffffff, TRUE),
75
76 /* We have a gap in the reloc numbers here.
77 R_386_standard counts the number up to this point, and
78 R_386_ext_offset is the value to subtract from a reloc type of
79 R_386_16 thru R_386_PC8 to form an index into this table. */
80#define R_386_standard (R_386_GOTPC + 1)
81#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
82
83 /* These relocs are a GNU extension. */
84 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
86 TRUE, 0xffffffff, 0xffffffff, FALSE),
87 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_386_TLS_IE",
89 TRUE, 0xffffffff, 0xffffffff, FALSE),
90 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
92 TRUE, 0xffffffff, 0xffffffff, FALSE),
93 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_386_TLS_LE",
95 TRUE, 0xffffffff, 0xffffffff, FALSE),
96 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
97 bfd_elf_generic_reloc, "R_386_TLS_GD",
98 TRUE, 0xffffffff, 0xffffffff, FALSE),
99 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_386_TLS_LDM",
101 TRUE, 0xffffffff, 0xffffffff, FALSE),
102 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_386_16",
104 TRUE, 0xffff, 0xffff, FALSE),
105 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_386_PC16",
107 TRUE, 0xffff, 0xffff, TRUE),
108 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_386_8",
110 TRUE, 0xff, 0xff, FALSE),
111 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
112 bfd_elf_generic_reloc, "R_386_PC8",
113 TRUE, 0xff, 0xff, TRUE),
114
115#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
116#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
117 /* These are common with Solaris TLS implementation. */
118 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
120 TRUE, 0xffffffff, 0xffffffff, FALSE),
121 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
123 TRUE, 0xffffffff, 0xffffffff, FALSE),
124 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
126 TRUE, 0xffffffff, 0xffffffff, FALSE),
127 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
129 TRUE, 0xffffffff, 0xffffffff, FALSE),
130 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
132 TRUE, 0xffffffff, 0xffffffff, FALSE),
133 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
135 TRUE, 0xffffffff, 0xffffffff, FALSE),
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136 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
137 bfd_elf_generic_reloc, "R_386_SIZE32",
138 TRUE, 0xffffffff, 0xffffffff, FALSE),
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139 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
141 TRUE, 0xffffffff, 0xffffffff, FALSE),
142 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
143 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
144 FALSE, 0, 0, FALSE),
145 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_386_TLS_DESC",
147 TRUE, 0xffffffff, 0xffffffff, FALSE),
148 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_386_IRELATIVE",
150 TRUE, 0xffffffff, 0xffffffff, FALSE),
151
152 /* Another gap. */
153#define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
154#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
155
156/* GNU extension to record C++ vtable hierarchy. */
157 HOWTO (R_386_GNU_VTINHERIT, /* type */
158 0, /* rightshift */
159 2, /* size (0 = byte, 1 = short, 2 = long) */
160 0, /* bitsize */
161 FALSE, /* pc_relative */
162 0, /* bitpos */
163 complain_overflow_dont, /* complain_on_overflow */
164 NULL, /* special_function */
165 "R_386_GNU_VTINHERIT", /* name */
166 FALSE, /* partial_inplace */
167 0, /* src_mask */
168 0, /* dst_mask */
169 FALSE), /* pcrel_offset */
170
171/* GNU extension to record C++ vtable member usage. */
172 HOWTO (R_386_GNU_VTENTRY, /* type */
173 0, /* rightshift */
174 2, /* size (0 = byte, 1 = short, 2 = long) */
175 0, /* bitsize */
176 FALSE, /* pc_relative */
177 0, /* bitpos */
178 complain_overflow_dont, /* complain_on_overflow */
179 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
180 "R_386_GNU_VTENTRY", /* name */
181 FALSE, /* partial_inplace */
182 0, /* src_mask */
183 0, /* dst_mask */
184 FALSE) /* pcrel_offset */
185
186#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
187
188};
189
190#ifdef DEBUG_GEN_RELOC
191#define TRACE(str) \
192 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
193#else
194#define TRACE(str)
195#endif
196
197static reloc_howto_type *
198elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
199 bfd_reloc_code_real_type code)
200{
201 switch (code)
202 {
203 case BFD_RELOC_NONE:
204 TRACE ("BFD_RELOC_NONE");
205 return &elf_howto_table[R_386_NONE];
206
207 case BFD_RELOC_32:
208 TRACE ("BFD_RELOC_32");
209 return &elf_howto_table[R_386_32];
210
211 case BFD_RELOC_CTOR:
212 TRACE ("BFD_RELOC_CTOR");
213 return &elf_howto_table[R_386_32];
214
215 case BFD_RELOC_32_PCREL:
216 TRACE ("BFD_RELOC_PC32");
217 return &elf_howto_table[R_386_PC32];
218
219 case BFD_RELOC_386_GOT32:
220 TRACE ("BFD_RELOC_386_GOT32");
221 return &elf_howto_table[R_386_GOT32];
222
223 case BFD_RELOC_386_PLT32:
224 TRACE ("BFD_RELOC_386_PLT32");
225 return &elf_howto_table[R_386_PLT32];
226
227 case BFD_RELOC_386_COPY:
228 TRACE ("BFD_RELOC_386_COPY");
229 return &elf_howto_table[R_386_COPY];
230
231 case BFD_RELOC_386_GLOB_DAT:
232 TRACE ("BFD_RELOC_386_GLOB_DAT");
233 return &elf_howto_table[R_386_GLOB_DAT];
234
235 case BFD_RELOC_386_JUMP_SLOT:
236 TRACE ("BFD_RELOC_386_JUMP_SLOT");
237 return &elf_howto_table[R_386_JUMP_SLOT];
238
239 case BFD_RELOC_386_RELATIVE:
240 TRACE ("BFD_RELOC_386_RELATIVE");
241 return &elf_howto_table[R_386_RELATIVE];
242
243 case BFD_RELOC_386_GOTOFF:
244 TRACE ("BFD_RELOC_386_GOTOFF");
245 return &elf_howto_table[R_386_GOTOFF];
246
247 case BFD_RELOC_386_GOTPC:
248 TRACE ("BFD_RELOC_386_GOTPC");
249 return &elf_howto_table[R_386_GOTPC];
250
251 /* These relocs are a GNU extension. */
252 case BFD_RELOC_386_TLS_TPOFF:
253 TRACE ("BFD_RELOC_386_TLS_TPOFF");
254 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
255
256 case BFD_RELOC_386_TLS_IE:
257 TRACE ("BFD_RELOC_386_TLS_IE");
258 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
259
260 case BFD_RELOC_386_TLS_GOTIE:
261 TRACE ("BFD_RELOC_386_TLS_GOTIE");
262 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
263
264 case BFD_RELOC_386_TLS_LE:
265 TRACE ("BFD_RELOC_386_TLS_LE");
266 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
267
268 case BFD_RELOC_386_TLS_GD:
269 TRACE ("BFD_RELOC_386_TLS_GD");
270 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
271
272 case BFD_RELOC_386_TLS_LDM:
273 TRACE ("BFD_RELOC_386_TLS_LDM");
274 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
275
276 case BFD_RELOC_16:
277 TRACE ("BFD_RELOC_16");
278 return &elf_howto_table[R_386_16 - R_386_ext_offset];
279
280 case BFD_RELOC_16_PCREL:
281 TRACE ("BFD_RELOC_16_PCREL");
282 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
283
284 case BFD_RELOC_8:
285 TRACE ("BFD_RELOC_8");
286 return &elf_howto_table[R_386_8 - R_386_ext_offset];
287
288 case BFD_RELOC_8_PCREL:
289 TRACE ("BFD_RELOC_8_PCREL");
290 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
291
292 /* Common with Sun TLS implementation. */
293 case BFD_RELOC_386_TLS_LDO_32:
294 TRACE ("BFD_RELOC_386_TLS_LDO_32");
295 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
296
297 case BFD_RELOC_386_TLS_IE_32:
298 TRACE ("BFD_RELOC_386_TLS_IE_32");
299 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
300
301 case BFD_RELOC_386_TLS_LE_32:
302 TRACE ("BFD_RELOC_386_TLS_LE_32");
303 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
304
305 case BFD_RELOC_386_TLS_DTPMOD32:
306 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
307 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
308
309 case BFD_RELOC_386_TLS_DTPOFF32:
310 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
311 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
312
313 case BFD_RELOC_386_TLS_TPOFF32:
314 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
315 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
316
ef5ccd6c
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317 case BFD_RELOC_SIZE32:
318 TRACE ("BFD_RELOC_SIZE32");
319 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
320
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321 case BFD_RELOC_386_TLS_GOTDESC:
322 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
323 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
324
325 case BFD_RELOC_386_TLS_DESC_CALL:
326 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
327 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
328
329 case BFD_RELOC_386_TLS_DESC:
330 TRACE ("BFD_RELOC_386_TLS_DESC");
331 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
332
333 case BFD_RELOC_386_IRELATIVE:
334 TRACE ("BFD_RELOC_386_IRELATIVE");
a45ae5f8 335 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
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336
337 case BFD_RELOC_VTABLE_INHERIT:
338 TRACE ("BFD_RELOC_VTABLE_INHERIT");
339 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
340
341 case BFD_RELOC_VTABLE_ENTRY:
342 TRACE ("BFD_RELOC_VTABLE_ENTRY");
343 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
344
345 default:
346 break;
347 }
348
349 TRACE ("Unknown");
350 return 0;
351}
352
353static reloc_howto_type *
354elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
355 const char *r_name)
356{
357 unsigned int i;
358
359 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
360 if (elf_howto_table[i].name != NULL
361 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
362 return &elf_howto_table[i];
363
364 return NULL;
365}
366
367static reloc_howto_type *
368elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
369{
370 unsigned int indx;
371
372 if ((indx = r_type) >= R_386_standard
373 && ((indx = r_type - R_386_ext_offset) - R_386_standard
374 >= R_386_ext - R_386_standard)
375 && ((indx = r_type - R_386_tls_offset) - R_386_ext
376 >= R_386_irelative - R_386_ext)
377 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
378 >= R_386_vt - R_386_irelative))
379 {
380 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
381 abfd, (int) r_type);
382 indx = R_386_NONE;
383 }
384 BFD_ASSERT (elf_howto_table [indx].type == r_type);
385 return &elf_howto_table[indx];
386}
387
388static void
389elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
390 arelent *cache_ptr,
391 Elf_Internal_Rela *dst)
392{
393 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
394 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
395}
396
397/* Return whether a symbol name implies a local label. The UnixWare
398 2.1 cc generates temporary symbols that start with .X, so we
399 recognize them here. FIXME: do other SVR4 compilers also use .X?.
400 If so, we should move the .X recognition into
401 _bfd_elf_is_local_label_name. */
402
403static bfd_boolean
404elf_i386_is_local_label_name (bfd *abfd, const char *name)
405{
406 if (name[0] == '.' && name[1] == 'X')
407 return TRUE;
408
409 return _bfd_elf_is_local_label_name (abfd, name);
410}
411\f
412/* Support for core dump NOTE sections. */
413
414static bfd_boolean
415elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
416{
417 int offset;
418 size_t size;
419
420 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
421 {
422 int pr_version = bfd_get_32 (abfd, note->descdata);
423
424 if (pr_version != 1)
425 return FALSE;
426
427 /* pr_cursig */
ef5ccd6c 428 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
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429
430 /* pr_pid */
ef5ccd6c 431 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
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432
433 /* pr_reg */
434 offset = 28;
435 size = bfd_get_32 (abfd, note->descdata + 8);
436 }
437 else
438 {
439 switch (note->descsz)
440 {
441 default:
442 return FALSE;
443
444 case 144: /* Linux/i386 */
445 /* pr_cursig */
ef5ccd6c 446 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
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447
448 /* pr_pid */
ef5ccd6c 449 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
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450
451 /* pr_reg */
452 offset = 72;
453 size = 68;
454
455 break;
456 }
457 }
458
459 /* Make a ".reg/999" section. */
460 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
461 size, note->descpos + offset);
462}
463
464static bfd_boolean
465elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
466{
467 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
468 {
469 int pr_version = bfd_get_32 (abfd, note->descdata);
470
471 if (pr_version != 1)
472 return FALSE;
473
ef5ccd6c 474 elf_tdata (abfd)->core->program
5796c8dc 475 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
ef5ccd6c 476 elf_tdata (abfd)->core->command
5796c8dc
SS
477 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
478 }
479 else
480 {
481 switch (note->descsz)
482 {
483 default:
484 return FALSE;
485
486 case 124: /* Linux/i386 elf_prpsinfo. */
ef5ccd6c 487 elf_tdata (abfd)->core->pid
c50c785c 488 = bfd_get_32 (abfd, note->descdata + 12);
ef5ccd6c 489 elf_tdata (abfd)->core->program
5796c8dc 490 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
ef5ccd6c 491 elf_tdata (abfd)->core->command
5796c8dc
SS
492 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
493 }
494 }
495
496 /* Note that for some reason, a spurious space is tacked
497 onto the end of the args in some (at least one anyway)
498 implementations, so strip it off if it exists. */
499 {
ef5ccd6c 500 char *command = elf_tdata (abfd)->core->command;
5796c8dc
SS
501 int n = strlen (command);
502
503 if (0 < n && command[n - 1] == ' ')
504 command[n - 1] = '\0';
505 }
506
507 return TRUE;
508}
509\f
510/* Functions for the i386 ELF linker.
511
512 In order to gain some understanding of code in this file without
513 knowing all the intricate details of the linker, note the
514 following:
515
516 Functions named elf_i386_* are called by external routines, other
517 functions are only called locally. elf_i386_* functions appear
518 in this file more or less in the order in which they are called
519 from external routines. eg. elf_i386_check_relocs is called
520 early in the link process, elf_i386_finish_dynamic_sections is
521 one of the last functions. */
522
523
524/* The name of the dynamic interpreter. This is put in the .interp
525 section. */
526
527#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
528
529/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
532 shared lib. */
533#define ELIMINATE_COPY_RELOCS 1
534
535/* The size in bytes of an entry in the procedure linkage table. */
536
537#define PLT_ENTRY_SIZE 16
538
539/* The first entry in an absolute procedure linkage table looks like
540 this. See the SVR4 ABI i386 supplement to see how this works.
541 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
542
543static const bfd_byte elf_i386_plt0_entry[12] =
544{
545 0xff, 0x35, /* pushl contents of address */
546 0, 0, 0, 0, /* replaced with address of .got + 4. */
547 0xff, 0x25, /* jmp indirect */
548 0, 0, 0, 0 /* replaced with address of .got + 8. */
549};
550
551/* Subsequent entries in an absolute procedure linkage table look like
552 this. */
553
554static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
555{
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
558 0x68, /* pushl immediate */
559 0, 0, 0, 0, /* replaced with offset into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt. */
562};
563
564/* The first entry in a PIC procedure linkage table look like this.
565 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
566
567static const bfd_byte elf_i386_pic_plt0_entry[12] =
568{
569 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
570 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
571};
572
573/* Subsequent entries in a PIC procedure linkage table look like this. */
574
575static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
576{
577 0xff, 0xa3, /* jmp *offset(%ebx) */
578 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
579 0x68, /* pushl immediate */
580 0, 0, 0, 0, /* replaced with offset into relocation table. */
581 0xe9, /* jmp relative */
582 0, 0, 0, 0 /* replaced with offset to start of .plt. */
583};
584
a45ae5f8
JM
585/* .eh_frame covering the .plt section. */
586
587static const bfd_byte elf_i386_eh_frame_plt[] =
588{
589#define PLT_CIE_LENGTH 20
590#define PLT_FDE_LENGTH 36
591#define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
592#define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
593 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
594 0, 0, 0, 0, /* CIE ID */
595 1, /* CIE version */
596 'z', 'R', 0, /* Augmentation string */
597 1, /* Code alignment factor */
598 0x7c, /* Data alignment factor */
599 8, /* Return address column */
600 1, /* Augmentation size */
601 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
602 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
603 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
604 DW_CFA_nop, DW_CFA_nop,
605
606 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
607 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
608 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
609 0, 0, 0, 0, /* .plt size goes here */
610 0, /* Augmentation size */
611 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
612 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
613 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
614 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
615 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
616 11, /* Block length */
617 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
618 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
619 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
620 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
621 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
622};
623
624struct elf_i386_plt_layout
625{
626 /* The first entry in an absolute procedure linkage table looks like this. */
627 const bfd_byte *plt0_entry;
628 unsigned int plt0_entry_size;
629
630 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
631 unsigned int plt0_got1_offset;
632 unsigned int plt0_got2_offset;
633
634 /* Later entries in an absolute procedure linkage table look like this. */
635 const bfd_byte *plt_entry;
636 unsigned int plt_entry_size;
637
638 /* Offsets into plt_entry that are to be replaced with... */
639 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
640 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
641 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
642
643 /* Offset into plt_entry where the initial value of the GOT entry points. */
644 unsigned int plt_lazy_offset;
645
646 /* The first entry in a PIC procedure linkage table looks like this. */
647 const bfd_byte *pic_plt0_entry;
648
649 /* Subsequent entries in a PIC procedure linkage table look like this. */
650 const bfd_byte *pic_plt_entry;
651
652 /* .eh_frame covering the .plt section. */
653 const bfd_byte *eh_frame_plt;
654 unsigned int eh_frame_plt_size;
655};
656
657#define GET_PLT_ENTRY_SIZE(abfd) \
658 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
659
660/* These are the standard parameters. */
661static const struct elf_i386_plt_layout elf_i386_plt =
662 {
663 elf_i386_plt0_entry, /* plt0_entry */
664 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
665 2, /* plt0_got1_offset */
666 8, /* plt0_got2_offset */
667 elf_i386_plt_entry, /* plt_entry */
668 PLT_ENTRY_SIZE, /* plt_entry_size */
669 2, /* plt_got_offset */
670 7, /* plt_reloc_offset */
671 12, /* plt_plt_offset */
672 6, /* plt_lazy_offset */
673 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
674 elf_i386_pic_plt_entry, /* pic_plt_entry */
675 elf_i386_eh_frame_plt, /* eh_frame_plt */
676 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
677 };
678\f
679
5796c8dc
SS
680/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
681 for the PLTResolve stub and then for each PLT entry. */
682#define PLTRESOLVE_RELOCS_SHLIB 0
683#define PLTRESOLVE_RELOCS 2
684#define PLT_NON_JUMP_SLOT_RELOCS 2
685
a45ae5f8
JM
686/* Architecture-specific backend data for i386. */
687
688struct elf_i386_backend_data
689{
690 /* Parameters describing PLT generation. */
691 const struct elf_i386_plt_layout *plt;
692
693 /* Value used to fill the unused bytes of the first PLT entry. */
694 bfd_byte plt0_pad_byte;
695
696 /* True if the target system is VxWorks. */
697 int is_vxworks;
698};
699
700#define get_elf_i386_backend_data(abfd) \
701 ((const struct elf_i386_backend_data *) \
702 get_elf_backend_data (abfd)->arch_data)
703
704/* These are the standard parameters. */
705static const struct elf_i386_backend_data elf_i386_arch_bed =
706 {
707 &elf_i386_plt, /* plt */
708 0, /* plt0_pad_byte */
709 0, /* is_vxworks */
710 };
711
712#define elf_backend_arch_data &elf_i386_arch_bed
713
5796c8dc
SS
714/* i386 ELF linker hash entry. */
715
716struct elf_i386_link_hash_entry
717{
718 struct elf_link_hash_entry elf;
719
720 /* Track dynamic relocs copied for this symbol. */
721 struct elf_dyn_relocs *dyn_relocs;
722
723#define GOT_UNKNOWN 0
724#define GOT_NORMAL 1
725#define GOT_TLS_GD 2
726#define GOT_TLS_IE 4
727#define GOT_TLS_IE_POS 5
728#define GOT_TLS_IE_NEG 6
729#define GOT_TLS_IE_BOTH 7
730#define GOT_TLS_GDESC 8
731#define GOT_TLS_GD_BOTH_P(type) \
732 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
733#define GOT_TLS_GD_P(type) \
734 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
735#define GOT_TLS_GDESC_P(type) \
736 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
737#define GOT_TLS_GD_ANY_P(type) \
738 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
739 unsigned char tls_type;
740
741 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
742 starting at the end of the jump table. */
743 bfd_vma tlsdesc_got;
744};
745
746#define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
747
748struct elf_i386_obj_tdata
749{
750 struct elf_obj_tdata root;
751
752 /* tls_type for each local got entry. */
753 char *local_got_tls_type;
754
755 /* GOTPLT entries for TLS descriptors. */
756 bfd_vma *local_tlsdesc_gotent;
757};
758
759#define elf_i386_tdata(abfd) \
760 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
761
762#define elf_i386_local_got_tls_type(abfd) \
763 (elf_i386_tdata (abfd)->local_got_tls_type)
764
765#define elf_i386_local_tlsdesc_gotent(abfd) \
766 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
767
768#define is_i386_elf(bfd) \
769 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
770 && elf_tdata (bfd) != NULL \
cf7f2e2d 771 && elf_object_id (bfd) == I386_ELF_DATA)
5796c8dc
SS
772
773static bfd_boolean
774elf_i386_mkobject (bfd *abfd)
775{
776 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
cf7f2e2d 777 I386_ELF_DATA);
5796c8dc
SS
778}
779
780/* i386 ELF linker hash table. */
781
782struct elf_i386_link_hash_table
783{
784 struct elf_link_hash_table elf;
785
786 /* Short-cuts to get to dynamic linker sections. */
787 asection *sdynbss;
788 asection *srelbss;
a45ae5f8 789 asection *plt_eh_frame;
5796c8dc 790
cf7f2e2d
JM
791 union
792 {
5796c8dc
SS
793 bfd_signed_vma refcount;
794 bfd_vma offset;
795 } tls_ldm_got;
796
797 /* The amount of space used by the reserved portion of the sgotplt
798 section, plus whatever space is used by the jump slots. */
799 bfd_vma sgotplt_jump_table_size;
800
801 /* Small local sym cache. */
802 struct sym_cache sym_cache;
803
804 /* _TLS_MODULE_BASE_ symbol. */
805 struct bfd_link_hash_entry *tls_module_base;
806
807 /* Used by local STT_GNU_IFUNC symbols. */
808 htab_t loc_hash_table;
cf7f2e2d
JM
809 void * loc_hash_memory;
810
811 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
812 asection *srelplt2;
813
cf7f2e2d
JM
814 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
815 bfd_vma next_tls_desc_index;
816
a45ae5f8
JM
817 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
818 bfd_vma next_jump_slot_index;
819
820 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
821 bfd_vma next_irelative_index;
5796c8dc
SS
822};
823
824/* Get the i386 ELF linker hash table from a link_info structure. */
825
826#define elf_i386_hash_table(p) \
cf7f2e2d
JM
827 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
828 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
5796c8dc
SS
829
830#define elf_i386_compute_jump_table_size(htab) \
831 ((htab)->next_tls_desc_index * 4)
832
833/* Create an entry in an i386 ELF linker hash table. */
834
835static struct bfd_hash_entry *
836elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
837 struct bfd_hash_table *table,
838 const char *string)
839{
840 /* Allocate the structure if it has not already been allocated by a
841 subclass. */
842 if (entry == NULL)
843 {
844 entry = (struct bfd_hash_entry *)
845 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
846 if (entry == NULL)
847 return entry;
848 }
849
850 /* Call the allocation method of the superclass. */
851 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
852 if (entry != NULL)
853 {
854 struct elf_i386_link_hash_entry *eh;
855
856 eh = (struct elf_i386_link_hash_entry *) entry;
857 eh->dyn_relocs = NULL;
858 eh->tls_type = GOT_UNKNOWN;
859 eh->tlsdesc_got = (bfd_vma) -1;
860 }
861
862 return entry;
863}
864
865/* Compute a hash of a local hash entry. We use elf_link_hash_entry
866 for local symbol so that we can handle local STT_GNU_IFUNC symbols
867 as global symbol. We reuse indx and dynstr_index for local symbol
868 hash since they aren't used by global symbols in this backend. */
869
870static hashval_t
871elf_i386_local_htab_hash (const void *ptr)
872{
873 struct elf_link_hash_entry *h
874 = (struct elf_link_hash_entry *) ptr;
875 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
876}
877
878/* Compare local hash entries. */
879
880static int
881elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
882{
883 struct elf_link_hash_entry *h1
884 = (struct elf_link_hash_entry *) ptr1;
885 struct elf_link_hash_entry *h2
886 = (struct elf_link_hash_entry *) ptr2;
887
888 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
889}
890
891/* Find and/or create a hash entry for local symbol. */
892
893static struct elf_link_hash_entry *
894elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
895 bfd *abfd, const Elf_Internal_Rela *rel,
896 bfd_boolean create)
897{
898 struct elf_i386_link_hash_entry e, *ret;
899 asection *sec = abfd->sections;
900 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
901 ELF32_R_SYM (rel->r_info));
902 void **slot;
903
904 e.elf.indx = sec->id;
905 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
906 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
907 create ? INSERT : NO_INSERT);
908
909 if (!slot)
910 return NULL;
911
912 if (*slot)
913 {
914 ret = (struct elf_i386_link_hash_entry *) *slot;
915 return &ret->elf;
916 }
917
918 ret = (struct elf_i386_link_hash_entry *)
919 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
920 sizeof (struct elf_i386_link_hash_entry));
921 if (ret)
922 {
923 memset (ret, 0, sizeof (*ret));
924 ret->elf.indx = sec->id;
925 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
926 ret->elf.dynindx = -1;
5796c8dc
SS
927 *slot = ret;
928 }
929 return &ret->elf;
930}
931
932/* Create an i386 ELF linker hash table. */
933
934static struct bfd_link_hash_table *
935elf_i386_link_hash_table_create (bfd *abfd)
936{
937 struct elf_i386_link_hash_table *ret;
938 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
939
ef5ccd6c 940 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
5796c8dc
SS
941 if (ret == NULL)
942 return NULL;
943
944 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
945 elf_i386_link_hash_newfunc,
cf7f2e2d
JM
946 sizeof (struct elf_i386_link_hash_entry),
947 I386_ELF_DATA))
5796c8dc
SS
948 {
949 free (ret);
950 return NULL;
951 }
952
5796c8dc
SS
953 ret->loc_hash_table = htab_try_create (1024,
954 elf_i386_local_htab_hash,
955 elf_i386_local_htab_eq,
956 NULL);
957 ret->loc_hash_memory = objalloc_create ();
958 if (!ret->loc_hash_table || !ret->loc_hash_memory)
959 {
960 free (ret);
961 return NULL;
962 }
963
964 return &ret->elf.root;
965}
966
967/* Destroy an i386 ELF linker hash table. */
968
969static void
970elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash)
971{
972 struct elf_i386_link_hash_table *htab
973 = (struct elf_i386_link_hash_table *) hash;
974
975 if (htab->loc_hash_table)
976 htab_delete (htab->loc_hash_table);
977 if (htab->loc_hash_memory)
978 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
ef5ccd6c 979 _bfd_elf_link_hash_table_free (hash);
5796c8dc
SS
980}
981
982/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
983 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
984 hash table. */
985
986static bfd_boolean
987elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
988{
989 struct elf_i386_link_hash_table *htab;
990
991 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
992 return FALSE;
993
994 htab = elf_i386_hash_table (info);
cf7f2e2d
JM
995 if (htab == NULL)
996 return FALSE;
997
ef5ccd6c 998 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
5796c8dc 999 if (!info->shared)
ef5ccd6c 1000 htab->srelbss = bfd_get_linker_section (dynobj, ".rel.bss");
5796c8dc
SS
1001
1002 if (!htab->sdynbss
1003 || (!info->shared && !htab->srelbss))
1004 abort ();
1005
a45ae5f8 1006 if (get_elf_i386_backend_data (dynobj)->is_vxworks
5796c8dc
SS
1007 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1008 &htab->srelplt2))
1009 return FALSE;
1010
a45ae5f8 1011 if (!info->no_ld_generated_unwind_info
ef5ccd6c 1012 && htab->plt_eh_frame == NULL
a45ae5f8
JM
1013 && htab->elf.splt != NULL)
1014 {
ef5ccd6c
JM
1015 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1016 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1017 | SEC_LINKER_CREATED);
a45ae5f8 1018 htab->plt_eh_frame
ef5ccd6c 1019 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
a45ae5f8
JM
1020 if (htab->plt_eh_frame == NULL
1021 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1022 return FALSE;
a45ae5f8
JM
1023 }
1024
5796c8dc
SS
1025 return TRUE;
1026}
1027
1028/* Copy the extra info we tack onto an elf_link_hash_entry. */
1029
1030static void
1031elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1032 struct elf_link_hash_entry *dir,
1033 struct elf_link_hash_entry *ind)
1034{
1035 struct elf_i386_link_hash_entry *edir, *eind;
1036
1037 edir = (struct elf_i386_link_hash_entry *) dir;
1038 eind = (struct elf_i386_link_hash_entry *) ind;
1039
1040 if (eind->dyn_relocs != NULL)
1041 {
1042 if (edir->dyn_relocs != NULL)
1043 {
1044 struct elf_dyn_relocs **pp;
1045 struct elf_dyn_relocs *p;
1046
1047 /* Add reloc counts against the indirect sym to the direct sym
1048 list. Merge any entries against the same section. */
1049 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1050 {
1051 struct elf_dyn_relocs *q;
1052
1053 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1054 if (q->sec == p->sec)
1055 {
1056 q->pc_count += p->pc_count;
1057 q->count += p->count;
1058 *pp = p->next;
1059 break;
1060 }
1061 if (q == NULL)
1062 pp = &p->next;
1063 }
1064 *pp = edir->dyn_relocs;
1065 }
1066
1067 edir->dyn_relocs = eind->dyn_relocs;
1068 eind->dyn_relocs = NULL;
1069 }
1070
1071 if (ind->root.type == bfd_link_hash_indirect
1072 && dir->got.refcount <= 0)
1073 {
1074 edir->tls_type = eind->tls_type;
1075 eind->tls_type = GOT_UNKNOWN;
1076 }
1077
1078 if (ELIMINATE_COPY_RELOCS
1079 && ind->root.type != bfd_link_hash_indirect
1080 && dir->dynamic_adjusted)
1081 {
1082 /* If called to transfer flags for a weakdef during processing
1083 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1084 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1085 dir->ref_dynamic |= ind->ref_dynamic;
1086 dir->ref_regular |= ind->ref_regular;
1087 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1088 dir->needs_plt |= ind->needs_plt;
1089 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1090 }
1091 else
1092 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1093}
1094
5796c8dc
SS
1095/* Return TRUE if the TLS access code sequence support transition
1096 from R_TYPE. */
1097
1098static bfd_boolean
1099elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1100 bfd_byte *contents,
1101 Elf_Internal_Shdr *symtab_hdr,
1102 struct elf_link_hash_entry **sym_hashes,
1103 unsigned int r_type,
1104 const Elf_Internal_Rela *rel,
1105 const Elf_Internal_Rela *relend)
1106{
1107 unsigned int val, type;
1108 unsigned long r_symndx;
1109 struct elf_link_hash_entry *h;
1110 bfd_vma offset;
1111
1112 /* Get the section contents. */
1113 if (contents == NULL)
1114 {
1115 if (elf_section_data (sec)->this_hdr.contents != NULL)
1116 contents = elf_section_data (sec)->this_hdr.contents;
1117 else
1118 {
1119 /* FIXME: How to better handle error condition? */
1120 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1121 return FALSE;
1122
1123 /* Cache the section contents for elf_link_input_bfd. */
1124 elf_section_data (sec)->this_hdr.contents = contents;
1125 }
1126 }
1127
1128 offset = rel->r_offset;
1129 switch (r_type)
1130 {
1131 case R_386_TLS_GD:
1132 case R_386_TLS_LDM:
1133 if (offset < 2 || (rel + 1) >= relend)
1134 return FALSE;
1135
1136 type = bfd_get_8 (abfd, contents + offset - 2);
1137 if (r_type == R_386_TLS_GD)
1138 {
1139 /* Check transition from GD access model. Only
1140 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1141 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1142 can transit to different access model. */
1143 if ((offset + 10) > sec->size ||
1144 (type != 0x8d && type != 0x04))
1145 return FALSE;
1146
1147 val = bfd_get_8 (abfd, contents + offset - 1);
1148 if (type == 0x04)
1149 {
1150 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1151 if (offset < 3)
1152 return FALSE;
1153
1154 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1155 return FALSE;
1156
1157 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1158 return FALSE;
1159 }
1160 else
1161 {
1162 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1163 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1164 return FALSE;
1165
1166 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1167 return FALSE;
1168 }
1169 }
1170 else
1171 {
1172 /* Check transition from LD access model. Only
1173 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1174 can transit to different access model. */
1175 if (type != 0x8d || (offset + 9) > sec->size)
1176 return FALSE;
1177
1178 val = bfd_get_8 (abfd, contents + offset - 1);
1179 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1180 return FALSE;
1181 }
1182
1183 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1184 return FALSE;
1185
1186 r_symndx = ELF32_R_SYM (rel[1].r_info);
1187 if (r_symndx < symtab_hdr->sh_info)
1188 return FALSE;
1189
1190 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1191 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1192 may be versioned. */
1193 return (h != NULL
1194 && h->root.root.string != NULL
1195 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1196 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1197 && (strncmp (h->root.root.string, "___tls_get_addr",
1198 15) == 0));
1199
1200 case R_386_TLS_IE:
1201 /* Check transition from IE access model:
1202 movl foo@indntpoff(%rip), %eax
1203 movl foo@indntpoff(%rip), %reg
1204 addl foo@indntpoff(%rip), %reg
1205 */
1206
1207 if (offset < 1 || (offset + 4) > sec->size)
1208 return FALSE;
1209
1210 /* Check "movl foo@tpoff(%rip), %eax" first. */
1211 val = bfd_get_8 (abfd, contents + offset - 1);
1212 if (val == 0xa1)
1213 return TRUE;
1214
1215 if (offset < 2)
1216 return FALSE;
1217
1218 /* Check movl|addl foo@tpoff(%rip), %reg. */
1219 type = bfd_get_8 (abfd, contents + offset - 2);
1220 return ((type == 0x8b || type == 0x03)
1221 && (val & 0xc7) == 0x05);
1222
1223 case R_386_TLS_GOTIE:
1224 case R_386_TLS_IE_32:
1225 /* Check transition from {IE_32,GOTIE} access model:
1226 subl foo@{tpoff,gontoff}(%reg1), %reg2
1227 movl foo@{tpoff,gontoff}(%reg1), %reg2
1228 addl foo@{tpoff,gontoff}(%reg1), %reg2
1229 */
1230
1231 if (offset < 2 || (offset + 4) > sec->size)
1232 return FALSE;
1233
1234 val = bfd_get_8 (abfd, contents + offset - 1);
1235 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1236 return FALSE;
1237
1238 type = bfd_get_8 (abfd, contents + offset - 2);
1239 return type == 0x8b || type == 0x2b || type == 0x03;
1240
1241 case R_386_TLS_GOTDESC:
1242 /* Check transition from GDesc access model:
1243 leal x@tlsdesc(%ebx), %eax
1244
1245 Make sure it's a leal adding ebx to a 32-bit offset
1246 into any register, although it's probably almost always
1247 going to be eax. */
1248
1249 if (offset < 2 || (offset + 4) > sec->size)
1250 return FALSE;
1251
1252 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1253 return FALSE;
1254
1255 val = bfd_get_8 (abfd, contents + offset - 1);
1256 return (val & 0xc7) == 0x83;
1257
1258 case R_386_TLS_DESC_CALL:
1259 /* Check transition from GDesc access model:
1260 call *x@tlsdesc(%rax)
1261 */
1262 if (offset + 2 <= sec->size)
1263 {
1264 /* Make sure that it's a call *x@tlsdesc(%rax). */
a45ae5f8
JM
1265 static const unsigned char call[] = { 0xff, 0x10 };
1266 return memcmp (contents + offset, call, 2) == 0;
5796c8dc
SS
1267 }
1268
1269 return FALSE;
1270
1271 default:
1272 abort ();
1273 }
1274}
1275
1276/* Return TRUE if the TLS access transition is OK or no transition
1277 will be performed. Update R_TYPE if there is a transition. */
1278
1279static bfd_boolean
1280elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1281 asection *sec, bfd_byte *contents,
1282 Elf_Internal_Shdr *symtab_hdr,
1283 struct elf_link_hash_entry **sym_hashes,
1284 unsigned int *r_type, int tls_type,
1285 const Elf_Internal_Rela *rel,
1286 const Elf_Internal_Rela *relend,
1287 struct elf_link_hash_entry *h,
1288 unsigned long r_symndx)
1289{
1290 unsigned int from_type = *r_type;
1291 unsigned int to_type = from_type;
1292 bfd_boolean check = TRUE;
1293
c50c785c
JM
1294 /* Skip TLS transition for functions. */
1295 if (h != NULL
1296 && (h->type == STT_FUNC
1297 || h->type == STT_GNU_IFUNC))
1298 return TRUE;
1299
5796c8dc
SS
1300 switch (from_type)
1301 {
1302 case R_386_TLS_GD:
1303 case R_386_TLS_GOTDESC:
1304 case R_386_TLS_DESC_CALL:
1305 case R_386_TLS_IE_32:
1306 case R_386_TLS_IE:
1307 case R_386_TLS_GOTIE:
1308 if (info->executable)
1309 {
1310 if (h == NULL)
1311 to_type = R_386_TLS_LE_32;
1312 else if (from_type != R_386_TLS_IE
1313 && from_type != R_386_TLS_GOTIE)
1314 to_type = R_386_TLS_IE_32;
1315 }
1316
1317 /* When we are called from elf_i386_relocate_section, CONTENTS
1318 isn't NULL and there may be additional transitions based on
1319 TLS_TYPE. */
1320 if (contents != NULL)
1321 {
1322 unsigned int new_to_type = to_type;
1323
1324 if (info->executable
1325 && h != NULL
1326 && h->dynindx == -1
1327 && (tls_type & GOT_TLS_IE))
1328 new_to_type = R_386_TLS_LE_32;
1329
1330 if (to_type == R_386_TLS_GD
1331 || to_type == R_386_TLS_GOTDESC
1332 || to_type == R_386_TLS_DESC_CALL)
1333 {
1334 if (tls_type == GOT_TLS_IE_POS)
1335 new_to_type = R_386_TLS_GOTIE;
1336 else if (tls_type & GOT_TLS_IE)
1337 new_to_type = R_386_TLS_IE_32;
1338 }
1339
1340 /* We checked the transition before when we were called from
1341 elf_i386_check_relocs. We only want to check the new
1342 transition which hasn't been checked before. */
1343 check = new_to_type != to_type && from_type == to_type;
1344 to_type = new_to_type;
1345 }
1346
1347 break;
1348
1349 case R_386_TLS_LDM:
1350 if (info->executable)
1351 to_type = R_386_TLS_LE_32;
1352 break;
1353
1354 default:
1355 return TRUE;
1356 }
1357
1358 /* Return TRUE if there is no transition. */
1359 if (from_type == to_type)
1360 return TRUE;
1361
1362 /* Check if the transition can be performed. */
1363 if (check
1364 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1365 symtab_hdr, sym_hashes,
1366 from_type, rel, relend))
1367 {
1368 reloc_howto_type *from, *to;
1369 const char *name;
1370
1371 from = elf_i386_rtype_to_howto (abfd, from_type);
1372 to = elf_i386_rtype_to_howto (abfd, to_type);
1373
1374 if (h)
1375 name = h->root.root.string;
1376 else
1377 {
5796c8dc 1378 struct elf_i386_link_hash_table *htab;
cf7f2e2d 1379
5796c8dc 1380 htab = elf_i386_hash_table (info);
cf7f2e2d
JM
1381 if (htab == NULL)
1382 name = "*unknown*";
1383 else
1384 {
1385 Elf_Internal_Sym *isym;
1386
1387 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1388 abfd, r_symndx);
1389 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1390 }
5796c8dc
SS
1391 }
1392
1393 (*_bfd_error_handler)
1394 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1395 "in section `%A' failed"),
1396 abfd, sec, from->name, to->name, name,
1397 (unsigned long) rel->r_offset);
1398 bfd_set_error (bfd_error_bad_value);
1399 return FALSE;
1400 }
1401
1402 *r_type = to_type;
1403 return TRUE;
1404}
1405
1406/* Look through the relocs for a section during the first phase, and
1407 calculate needed space in the global offset table, procedure linkage
1408 table, and dynamic reloc sections. */
1409
1410static bfd_boolean
1411elf_i386_check_relocs (bfd *abfd,
1412 struct bfd_link_info *info,
1413 asection *sec,
1414 const Elf_Internal_Rela *relocs)
1415{
1416 struct elf_i386_link_hash_table *htab;
1417 Elf_Internal_Shdr *symtab_hdr;
1418 struct elf_link_hash_entry **sym_hashes;
1419 const Elf_Internal_Rela *rel;
1420 const Elf_Internal_Rela *rel_end;
1421 asection *sreloc;
1422
1423 if (info->relocatable)
1424 return TRUE;
1425
1426 BFD_ASSERT (is_i386_elf (abfd));
1427
1428 htab = elf_i386_hash_table (info);
cf7f2e2d
JM
1429 if (htab == NULL)
1430 return FALSE;
1431
5796c8dc
SS
1432 symtab_hdr = &elf_symtab_hdr (abfd);
1433 sym_hashes = elf_sym_hashes (abfd);
1434
1435 sreloc = NULL;
1436
1437 rel_end = relocs + sec->reloc_count;
1438 for (rel = relocs; rel < rel_end; rel++)
1439 {
1440 unsigned int r_type;
1441 unsigned long r_symndx;
1442 struct elf_link_hash_entry *h;
1443 Elf_Internal_Sym *isym;
1444 const char *name;
ef5ccd6c 1445 bfd_boolean size_reloc;
5796c8dc
SS
1446
1447 r_symndx = ELF32_R_SYM (rel->r_info);
1448 r_type = ELF32_R_TYPE (rel->r_info);
1449
1450 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1451 {
1452 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1453 abfd,
1454 r_symndx);
1455 return FALSE;
1456 }
1457
1458 if (r_symndx < symtab_hdr->sh_info)
1459 {
1460 /* A local symbol. */
1461 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1462 abfd, r_symndx);
1463 if (isym == NULL)
1464 return FALSE;
1465
1466 /* Check relocation against local STT_GNU_IFUNC symbol. */
1467 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1468 {
c50c785c 1469 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
5796c8dc
SS
1470 if (h == NULL)
1471 return FALSE;
cf7f2e2d 1472
5796c8dc
SS
1473 /* Fake a STT_GNU_IFUNC symbol. */
1474 h->type = STT_GNU_IFUNC;
1475 h->def_regular = 1;
1476 h->ref_regular = 1;
1477 h->forced_local = 1;
1478 h->root.type = bfd_link_hash_defined;
1479 }
1480 else
1481 h = NULL;
1482 }
1483 else
1484 {
1485 isym = NULL;
1486 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1487 while (h->root.type == bfd_link_hash_indirect
1488 || h->root.type == bfd_link_hash_warning)
1489 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1490 }
1491
1492 if (h != NULL)
1493 {
1494 /* Create the ifunc sections for static executables. If we
1495 never see an indirect function symbol nor we are building
1496 a static executable, those sections will be empty and
1497 won't appear in output. */
1498 switch (r_type)
1499 {
1500 default:
1501 break;
1502
1503 case R_386_32:
1504 case R_386_PC32:
1505 case R_386_PLT32:
1506 case R_386_GOT32:
1507 case R_386_GOTOFF:
a45ae5f8
JM
1508 if (htab->elf.dynobj == NULL)
1509 htab->elf.dynobj = abfd;
1510 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
5796c8dc
SS
1511 return FALSE;
1512 break;
1513 }
1514
ef5ccd6c
JM
1515 /* It is referenced by a non-shared object. */
1516 h->ref_regular = 1;
5796c8dc
SS
1517 }
1518
1519 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1520 symtab_hdr, sym_hashes,
1521 &r_type, GOT_UNKNOWN,
a45ae5f8 1522 rel, rel_end, h, r_symndx))
5796c8dc
SS
1523 return FALSE;
1524
1525 switch (r_type)
1526 {
1527 case R_386_TLS_LDM:
1528 htab->tls_ldm_got.refcount += 1;
1529 goto create_got;
1530
1531 case R_386_PLT32:
1532 /* This symbol requires a procedure linkage table entry. We
1533 actually build the entry in adjust_dynamic_symbol,
1534 because this might be a case of linking PIC code which is
1535 never referenced by a dynamic object, in which case we
1536 don't need to generate a procedure linkage table entry
1537 after all. */
1538
1539 /* If this is a local symbol, we resolve it directly without
1540 creating a procedure linkage table entry. */
1541 if (h == NULL)
1542 continue;
1543
1544 h->needs_plt = 1;
1545 h->plt.refcount += 1;
1546 break;
1547
ef5ccd6c
JM
1548 case R_386_SIZE32:
1549 size_reloc = TRUE;
1550 goto do_size;
1551
5796c8dc
SS
1552 case R_386_TLS_IE_32:
1553 case R_386_TLS_IE:
1554 case R_386_TLS_GOTIE:
1555 if (!info->executable)
1556 info->flags |= DF_STATIC_TLS;
1557 /* Fall through */
1558
1559 case R_386_GOT32:
1560 case R_386_TLS_GD:
1561 case R_386_TLS_GOTDESC:
1562 case R_386_TLS_DESC_CALL:
1563 /* This symbol requires a global offset table entry. */
1564 {
1565 int tls_type, old_tls_type;
1566
1567 switch (r_type)
1568 {
1569 default:
1570 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1571 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1572 case R_386_TLS_GOTDESC:
1573 case R_386_TLS_DESC_CALL:
1574 tls_type = GOT_TLS_GDESC; break;
1575 case R_386_TLS_IE_32:
1576 if (ELF32_R_TYPE (rel->r_info) == r_type)
1577 tls_type = GOT_TLS_IE_NEG;
1578 else
1579 /* If this is a GD->IE transition, we may use either of
1580 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1581 tls_type = GOT_TLS_IE;
1582 break;
1583 case R_386_TLS_IE:
1584 case R_386_TLS_GOTIE:
1585 tls_type = GOT_TLS_IE_POS; break;
1586 }
1587
1588 if (h != NULL)
1589 {
1590 h->got.refcount += 1;
1591 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1592 }
1593 else
1594 {
1595 bfd_signed_vma *local_got_refcounts;
1596
1597 /* This is a global offset table entry for a local symbol. */
1598 local_got_refcounts = elf_local_got_refcounts (abfd);
1599 if (local_got_refcounts == NULL)
1600 {
1601 bfd_size_type size;
1602
1603 size = symtab_hdr->sh_info;
1604 size *= (sizeof (bfd_signed_vma)
1605 + sizeof (bfd_vma) + sizeof(char));
1606 local_got_refcounts = (bfd_signed_vma *)
1607 bfd_zalloc (abfd, size);
1608 if (local_got_refcounts == NULL)
1609 return FALSE;
1610 elf_local_got_refcounts (abfd) = local_got_refcounts;
1611 elf_i386_local_tlsdesc_gotent (abfd)
1612 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1613 elf_i386_local_got_tls_type (abfd)
1614 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1615 }
1616 local_got_refcounts[r_symndx] += 1;
1617 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1618 }
1619
1620 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1621 tls_type |= old_tls_type;
1622 /* If a TLS symbol is accessed using IE at least once,
1623 there is no point to use dynamic model for it. */
1624 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1625 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1626 || (tls_type & GOT_TLS_IE) == 0))
1627 {
1628 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1629 tls_type = old_tls_type;
1630 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1631 && GOT_TLS_GD_ANY_P (tls_type))
1632 tls_type |= old_tls_type;
1633 else
1634 {
1635 if (h)
1636 name = h->root.root.string;
1637 else
1638 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1639 NULL);
1640 (*_bfd_error_handler)
1641 (_("%B: `%s' accessed both as normal and "
1642 "thread local symbol"),
1643 abfd, name);
ef5ccd6c 1644 bfd_set_error (bfd_error_bad_value);
5796c8dc
SS
1645 return FALSE;
1646 }
1647 }
1648
1649 if (old_tls_type != tls_type)
1650 {
1651 if (h != NULL)
1652 elf_i386_hash_entry (h)->tls_type = tls_type;
1653 else
1654 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1655 }
1656 }
1657 /* Fall through */
1658
1659 case R_386_GOTOFF:
1660 case R_386_GOTPC:
1661 create_got:
1662 if (htab->elf.sgot == NULL)
1663 {
1664 if (htab->elf.dynobj == NULL)
1665 htab->elf.dynobj = abfd;
1666 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1667 return FALSE;
1668 }
1669 if (r_type != R_386_TLS_IE)
1670 break;
1671 /* Fall through */
1672
1673 case R_386_TLS_LE_32:
1674 case R_386_TLS_LE:
1675 if (info->executable)
1676 break;
1677 info->flags |= DF_STATIC_TLS;
1678 /* Fall through */
1679
1680 case R_386_32:
1681 case R_386_PC32:
1682 if (h != NULL && info->executable)
1683 {
1684 /* If this reloc is in a read-only section, we might
1685 need a copy reloc. We can't check reliably at this
1686 stage whether the section is read-only, as input
1687 sections have not yet been mapped to output sections.
1688 Tentatively set the flag for now, and correct in
1689 adjust_dynamic_symbol. */
1690 h->non_got_ref = 1;
1691
1692 /* We may need a .plt entry if the function this reloc
1693 refers to is in a shared lib. */
1694 h->plt.refcount += 1;
1695 if (r_type != R_386_PC32)
1696 h->pointer_equality_needed = 1;
1697 }
1698
ef5ccd6c
JM
1699 size_reloc = FALSE;
1700do_size:
5796c8dc
SS
1701 /* If we are creating a shared library, and this is a reloc
1702 against a global symbol, or a non PC relative reloc
1703 against a local symbol, then we need to copy the reloc
1704 into the shared library. However, if we are linking with
1705 -Bsymbolic, we do not need to copy a reloc against a
1706 global symbol which is defined in an object we are
1707 including in the link (i.e., DEF_REGULAR is set). At
1708 this point we have not seen all the input files, so it is
1709 possible that DEF_REGULAR is not set now but will be set
1710 later (it is never cleared). In case of a weak definition,
1711 DEF_REGULAR may be cleared later by a strong definition in
1712 a shared library. We account for that possibility below by
1713 storing information in the relocs_copied field of the hash
1714 table entry. A similar situation occurs when creating
1715 shared libraries and symbol visibility changes render the
1716 symbol local.
1717
1718 If on the other hand, we are creating an executable, we
1719 may need to keep relocations for symbols satisfied by a
1720 dynamic library if we manage to avoid copy relocs for the
1721 symbol. */
1722 if ((info->shared
1723 && (sec->flags & SEC_ALLOC) != 0
1724 && (r_type != R_386_PC32
1725 || (h != NULL
1726 && (! SYMBOLIC_BIND (info, h)
1727 || h->root.type == bfd_link_hash_defweak
1728 || !h->def_regular))))
1729 || (ELIMINATE_COPY_RELOCS
1730 && !info->shared
1731 && (sec->flags & SEC_ALLOC) != 0
1732 && h != NULL
1733 && (h->root.type == bfd_link_hash_defweak
1734 || !h->def_regular)))
1735 {
1736 struct elf_dyn_relocs *p;
1737 struct elf_dyn_relocs **head;
1738
1739 /* We must copy these reloc types into the output file.
1740 Create a reloc section in dynobj and make room for
1741 this reloc. */
1742 if (sreloc == NULL)
1743 {
1744 if (htab->elf.dynobj == NULL)
1745 htab->elf.dynobj = abfd;
1746
1747 sreloc = _bfd_elf_make_dynamic_reloc_section
1748 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1749
1750 if (sreloc == NULL)
1751 return FALSE;
1752 }
1753
1754 /* If this is a global symbol, we count the number of
1755 relocations we need for this symbol. */
1756 if (h != NULL)
1757 {
1758 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1759 }
1760 else
1761 {
1762 /* Track dynamic relocs needed for local syms too.
1763 We really need local syms available to do this
1764 easily. Oh well. */
1765 void **vpp;
1766 asection *s;
5796c8dc
SS
1767
1768 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1769 abfd, r_symndx);
1770 if (isym == NULL)
1771 return FALSE;
1772
1773 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1774 if (s == NULL)
1775 s = sec;
1776
1777 vpp = &elf_section_data (s)->local_dynrel;
1778 head = (struct elf_dyn_relocs **)vpp;
1779 }
1780
1781 p = *head;
1782 if (p == NULL || p->sec != sec)
1783 {
1784 bfd_size_type amt = sizeof *p;
1785 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1786 amt);
1787 if (p == NULL)
1788 return FALSE;
1789 p->next = *head;
1790 *head = p;
1791 p->sec = sec;
1792 p->count = 0;
1793 p->pc_count = 0;
1794 }
1795
1796 p->count += 1;
ef5ccd6c
JM
1797 /* Count size relocation as PC-relative relocation. */
1798 if (r_type == R_386_PC32 || size_reloc)
5796c8dc
SS
1799 p->pc_count += 1;
1800 }
1801 break;
1802
1803 /* This relocation describes the C++ object vtable hierarchy.
1804 Reconstruct it for later use during GC. */
1805 case R_386_GNU_VTINHERIT:
1806 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1807 return FALSE;
1808 break;
1809
1810 /* This relocation describes which C++ vtable entries are actually
1811 used. Record for later use during GC. */
1812 case R_386_GNU_VTENTRY:
1813 BFD_ASSERT (h != NULL);
1814 if (h != NULL
1815 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1816 return FALSE;
1817 break;
1818
1819 default:
1820 break;
1821 }
1822 }
1823
1824 return TRUE;
1825}
1826
1827/* Return the section that should be marked against GC for a given
1828 relocation. */
1829
1830static asection *
1831elf_i386_gc_mark_hook (asection *sec,
1832 struct bfd_link_info *info,
1833 Elf_Internal_Rela *rel,
1834 struct elf_link_hash_entry *h,
1835 Elf_Internal_Sym *sym)
1836{
1837 if (h != NULL)
1838 switch (ELF32_R_TYPE (rel->r_info))
1839 {
1840 case R_386_GNU_VTINHERIT:
1841 case R_386_GNU_VTENTRY:
1842 return NULL;
1843 }
1844
1845 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1846}
1847
1848/* Update the got entry reference counts for the section being removed. */
1849
1850static bfd_boolean
1851elf_i386_gc_sweep_hook (bfd *abfd,
1852 struct bfd_link_info *info,
1853 asection *sec,
1854 const Elf_Internal_Rela *relocs)
1855{
cf7f2e2d 1856 struct elf_i386_link_hash_table *htab;
5796c8dc
SS
1857 Elf_Internal_Shdr *symtab_hdr;
1858 struct elf_link_hash_entry **sym_hashes;
1859 bfd_signed_vma *local_got_refcounts;
1860 const Elf_Internal_Rela *rel, *relend;
1861
1862 if (info->relocatable)
1863 return TRUE;
1864
cf7f2e2d
JM
1865 htab = elf_i386_hash_table (info);
1866 if (htab == NULL)
1867 return FALSE;
1868
5796c8dc
SS
1869 elf_section_data (sec)->local_dynrel = NULL;
1870
1871 symtab_hdr = &elf_symtab_hdr (abfd);
1872 sym_hashes = elf_sym_hashes (abfd);
1873 local_got_refcounts = elf_local_got_refcounts (abfd);
1874
1875 relend = relocs + sec->reloc_count;
1876 for (rel = relocs; rel < relend; rel++)
1877 {
1878 unsigned long r_symndx;
1879 unsigned int r_type;
1880 struct elf_link_hash_entry *h = NULL;
1881
1882 r_symndx = ELF32_R_SYM (rel->r_info);
1883 if (r_symndx >= symtab_hdr->sh_info)
1884 {
5796c8dc
SS
1885 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1886 while (h->root.type == bfd_link_hash_indirect
1887 || h->root.type == bfd_link_hash_warning)
1888 h = (struct elf_link_hash_entry *) h->root.u.i.link;
c50c785c
JM
1889 }
1890 else
1891 {
1892 /* A local symbol. */
1893 Elf_Internal_Sym *isym;
1894
1895 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1896 abfd, r_symndx);
1897
1898 /* Check relocation against local STT_GNU_IFUNC symbol. */
1899 if (isym != NULL
1900 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1901 {
1902 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
1903 if (h == NULL)
1904 abort ();
1905 }
1906 }
1907
1908 if (h)
1909 {
1910 struct elf_i386_link_hash_entry *eh;
1911 struct elf_dyn_relocs **pp;
1912 struct elf_dyn_relocs *p;
5796c8dc 1913
c50c785c 1914 eh = (struct elf_i386_link_hash_entry *) h;
5796c8dc
SS
1915 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1916 if (p->sec == sec)
1917 {
1918 /* Everything must go for SEC. */
1919 *pp = p->next;
1920 break;
1921 }
1922 }
1923
1924 r_type = ELF32_R_TYPE (rel->r_info);
1925 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1926 symtab_hdr, sym_hashes,
1927 &r_type, GOT_UNKNOWN,
a45ae5f8 1928 rel, relend, h, r_symndx))
5796c8dc
SS
1929 return FALSE;
1930
1931 switch (r_type)
1932 {
1933 case R_386_TLS_LDM:
cf7f2e2d
JM
1934 if (htab->tls_ldm_got.refcount > 0)
1935 htab->tls_ldm_got.refcount -= 1;
5796c8dc
SS
1936 break;
1937
1938 case R_386_TLS_GD:
1939 case R_386_TLS_GOTDESC:
1940 case R_386_TLS_DESC_CALL:
1941 case R_386_TLS_IE_32:
1942 case R_386_TLS_IE:
1943 case R_386_TLS_GOTIE:
1944 case R_386_GOT32:
1945 if (h != NULL)
1946 {
1947 if (h->got.refcount > 0)
1948 h->got.refcount -= 1;
c50c785c
JM
1949 if (h->type == STT_GNU_IFUNC)
1950 {
1951 if (h->plt.refcount > 0)
1952 h->plt.refcount -= 1;
1953 }
5796c8dc
SS
1954 }
1955 else if (local_got_refcounts != NULL)
1956 {
1957 if (local_got_refcounts[r_symndx] > 0)
1958 local_got_refcounts[r_symndx] -= 1;
1959 }
1960 break;
1961
1962 case R_386_32:
1963 case R_386_PC32:
ef5ccd6c 1964 case R_386_SIZE32:
c50c785c
JM
1965 if (info->shared
1966 && (h == NULL || h->type != STT_GNU_IFUNC))
5796c8dc
SS
1967 break;
1968 /* Fall through */
1969
1970 case R_386_PLT32:
1971 if (h != NULL)
1972 {
1973 if (h->plt.refcount > 0)
1974 h->plt.refcount -= 1;
1975 }
1976 break;
1977
c50c785c
JM
1978 case R_386_GOTOFF:
1979 if (h != NULL && h->type == STT_GNU_IFUNC)
1980 {
1981 if (h->got.refcount > 0)
1982 h->got.refcount -= 1;
1983 if (h->plt.refcount > 0)
1984 h->plt.refcount -= 1;
1985 }
1986 break;
1987
5796c8dc
SS
1988 default:
1989 break;
1990 }
1991 }
1992
1993 return TRUE;
1994}
1995
1996/* Adjust a symbol defined by a dynamic object and referenced by a
1997 regular object. The current definition is in some section of the
1998 dynamic object, but we're not including those sections. We have to
1999 change the definition to something the rest of the link can
2000 understand. */
2001
2002static bfd_boolean
2003elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2004 struct elf_link_hash_entry *h)
2005{
2006 struct elf_i386_link_hash_table *htab;
2007 asection *s;
ef5ccd6c
JM
2008 struct elf_i386_link_hash_entry *eh;
2009 struct elf_dyn_relocs *p;
5796c8dc
SS
2010
2011 /* STT_GNU_IFUNC symbol must go through PLT. */
2012 if (h->type == STT_GNU_IFUNC)
2013 {
ef5ccd6c
JM
2014 /* All local STT_GNU_IFUNC references must be treate as local
2015 calls via local PLT. */
2016 if (h->ref_regular
2017 && SYMBOL_CALLS_LOCAL (info, h))
2018 {
2019 bfd_size_type pc_count = 0, count = 0;
2020 struct elf_dyn_relocs **pp;
2021
2022 eh = (struct elf_i386_link_hash_entry *) h;
2023 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2024 {
2025 pc_count += p->pc_count;
2026 p->count -= p->pc_count;
2027 p->pc_count = 0;
2028 count += p->count;
2029 if (p->count == 0)
2030 *pp = p->next;
2031 else
2032 pp = &p->next;
2033 }
2034
2035 if (pc_count || count)
2036 {
2037 h->needs_plt = 1;
2038 h->non_got_ref = 1;
2039 if (h->plt.refcount <= 0)
2040 h->plt.refcount = 1;
2041 else
2042 h->plt.refcount += 1;
2043 }
2044 }
2045
5796c8dc
SS
2046 if (h->plt.refcount <= 0)
2047 {
2048 h->plt.offset = (bfd_vma) -1;
2049 h->needs_plt = 0;
2050 }
2051 return TRUE;
2052 }
2053
2054 /* If this is a function, put it in the procedure linkage table. We
2055 will fill in the contents of the procedure linkage table later,
2056 when we know the address of the .got section. */
2057 if (h->type == STT_FUNC
2058 || h->needs_plt)
2059 {
2060 if (h->plt.refcount <= 0
2061 || SYMBOL_CALLS_LOCAL (info, h)
2062 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2063 && h->root.type == bfd_link_hash_undefweak))
2064 {
2065 /* This case can occur if we saw a PLT32 reloc in an input
2066 file, but the symbol was never referred to by a dynamic
2067 object, or if all references were garbage collected. In
2068 such a case, we don't actually need to build a procedure
2069 linkage table, and we can just do a PC32 reloc instead. */
2070 h->plt.offset = (bfd_vma) -1;
2071 h->needs_plt = 0;
2072 }
2073
2074 return TRUE;
2075 }
2076 else
2077 /* It's possible that we incorrectly decided a .plt reloc was
2078 needed for an R_386_PC32 reloc to a non-function sym in
2079 check_relocs. We can't decide accurately between function and
2080 non-function syms in check-relocs; Objects loaded later in
2081 the link may change h->type. So fix it now. */
2082 h->plt.offset = (bfd_vma) -1;
2083
2084 /* If this is a weak symbol, and there is a real definition, the
2085 processor independent code will have arranged for us to see the
2086 real definition first, and we can just use the same value. */
2087 if (h->u.weakdef != NULL)
2088 {
2089 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2090 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2091 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2092 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2093 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2094 h->non_got_ref = h->u.weakdef->non_got_ref;
2095 return TRUE;
2096 }
2097
2098 /* This is a reference to a symbol defined by a dynamic object which
2099 is not a function. */
2100
2101 /* If we are creating a shared library, we must presume that the
2102 only references to the symbol are via the global offset table.
2103 For such cases we need not do anything here; the relocations will
2104 be handled correctly by relocate_section. */
2105 if (info->shared)
2106 return TRUE;
2107
2108 /* If there are no references to this symbol that do not use the
2109 GOT, we don't need to generate a copy reloc. */
2110 if (!h->non_got_ref)
2111 return TRUE;
2112
2113 /* If -z nocopyreloc was given, we won't generate them either. */
2114 if (info->nocopyreloc)
2115 {
2116 h->non_got_ref = 0;
2117 return TRUE;
2118 }
2119
2120 htab = elf_i386_hash_table (info);
cf7f2e2d
JM
2121 if (htab == NULL)
2122 return FALSE;
5796c8dc
SS
2123
2124 /* If there aren't any dynamic relocs in read-only sections, then
2125 we can keep the dynamic relocs and avoid the copy reloc. This
2126 doesn't work on VxWorks, where we can not have dynamic relocations
2127 (other than copy and jump slot relocations) in an executable. */
a45ae5f8
JM
2128 if (ELIMINATE_COPY_RELOCS
2129 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
5796c8dc 2130 {
5796c8dc
SS
2131 eh = (struct elf_i386_link_hash_entry *) h;
2132 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2133 {
2134 s = p->sec->output_section;
2135 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2136 break;
2137 }
2138
2139 if (p == NULL)
2140 {
2141 h->non_got_ref = 0;
2142 return TRUE;
2143 }
2144 }
2145
5796c8dc
SS
2146 /* We must allocate the symbol in our .dynbss section, which will
2147 become part of the .bss section of the executable. There will be
2148 an entry for this symbol in the .dynsym section. The dynamic
2149 object will contain position independent code, so all references
2150 from the dynamic object to this symbol will go through the global
2151 offset table. The dynamic linker will use the .dynsym entry to
2152 determine the address it must put in the global offset table, so
2153 both the dynamic object and the regular object will refer to the
2154 same memory location for the variable. */
2155
2156 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2157 copy the initial value out of the dynamic object and into the
2158 runtime process image. */
ef5ccd6c 2159 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5796c8dc
SS
2160 {
2161 htab->srelbss->size += sizeof (Elf32_External_Rel);
2162 h->needs_copy = 1;
2163 }
2164
2165 s = htab->sdynbss;
2166
2167 return _bfd_elf_adjust_dynamic_copy (h, s);
2168}
2169
2170/* Allocate space in .plt, .got and associated reloc sections for
2171 dynamic relocs. */
2172
2173static bfd_boolean
2174elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2175{
2176 struct bfd_link_info *info;
2177 struct elf_i386_link_hash_table *htab;
2178 struct elf_i386_link_hash_entry *eh;
2179 struct elf_dyn_relocs *p;
a45ae5f8 2180 unsigned plt_entry_size;
5796c8dc
SS
2181
2182 if (h->root.type == bfd_link_hash_indirect)
2183 return TRUE;
2184
5796c8dc
SS
2185 eh = (struct elf_i386_link_hash_entry *) h;
2186
2187 info = (struct bfd_link_info *) inf;
2188 htab = elf_i386_hash_table (info);
cf7f2e2d
JM
2189 if (htab == NULL)
2190 return FALSE;
5796c8dc 2191
a45ae5f8
JM
2192 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2193
5796c8dc
SS
2194 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2195 here if it is defined and referenced in a non-shared object. */
2196 if (h->type == STT_GNU_IFUNC
2197 && h->def_regular)
a45ae5f8
JM
2198 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2199 plt_entry_size, 4);
5796c8dc
SS
2200 else if (htab->elf.dynamic_sections_created
2201 && h->plt.refcount > 0)
2202 {
2203 /* Make sure this symbol is output as a dynamic symbol.
2204 Undefined weak syms won't yet be marked as dynamic. */
2205 if (h->dynindx == -1
2206 && !h->forced_local)
2207 {
2208 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2209 return FALSE;
2210 }
2211
2212 if (info->shared
2213 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2214 {
2215 asection *s = htab->elf.splt;
2216
2217 /* If this is the first .plt entry, make room for the special
2218 first entry. */
2219 if (s->size == 0)
a45ae5f8 2220 s->size += plt_entry_size;
5796c8dc
SS
2221
2222 h->plt.offset = s->size;
2223
2224 /* If this symbol is not defined in a regular file, and we are
2225 not generating a shared library, then set the symbol to this
2226 location in the .plt. This is required to make function
2227 pointers compare as equal between the normal executable and
2228 the shared library. */
2229 if (! info->shared
2230 && !h->def_regular)
2231 {
2232 h->root.u.def.section = s;
2233 h->root.u.def.value = h->plt.offset;
2234 }
2235
2236 /* Make room for this entry. */
a45ae5f8 2237 s->size += plt_entry_size;
5796c8dc
SS
2238
2239 /* We also need to make an entry in the .got.plt section, which
2240 will be placed in the .got section by the linker script. */
2241 htab->elf.sgotplt->size += 4;
2242
2243 /* We also need to make an entry in the .rel.plt section. */
2244 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
a45ae5f8 2245 htab->elf.srelplt->reloc_count++;
5796c8dc 2246
a45ae5f8
JM
2247 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2248 && !info->shared)
5796c8dc
SS
2249 {
2250 /* VxWorks has a second set of relocations for each PLT entry
2251 in executables. They go in a separate relocation section,
2252 which is processed by the kernel loader. */
2253
2254 /* There are two relocations for the initial PLT entry: an
2255 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2256 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2257
a45ae5f8 2258 if (h->plt.offset == plt_entry_size)
5796c8dc
SS
2259 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2260
2261 /* There are two extra relocations for each subsequent PLT entry:
2262 an R_386_32 relocation for the GOT entry, and an R_386_32
2263 relocation for the PLT entry. */
2264
2265 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2266 }
2267 }
2268 else
2269 {
2270 h->plt.offset = (bfd_vma) -1;
2271 h->needs_plt = 0;
2272 }
2273 }
2274 else
2275 {
2276 h->plt.offset = (bfd_vma) -1;
2277 h->needs_plt = 0;
2278 }
2279
2280 eh->tlsdesc_got = (bfd_vma) -1;
2281
2282 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2283 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2284 if (h->got.refcount > 0
2285 && info->executable
2286 && h->dynindx == -1
2287 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2288 h->got.offset = (bfd_vma) -1;
2289 else if (h->got.refcount > 0)
2290 {
2291 asection *s;
2292 bfd_boolean dyn;
2293 int tls_type = elf_i386_hash_entry(h)->tls_type;
2294
2295 /* Make sure this symbol is output as a dynamic symbol.
2296 Undefined weak syms won't yet be marked as dynamic. */
2297 if (h->dynindx == -1
2298 && !h->forced_local)
2299 {
2300 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2301 return FALSE;
2302 }
2303
2304 s = htab->elf.sgot;
2305 if (GOT_TLS_GDESC_P (tls_type))
2306 {
2307 eh->tlsdesc_got = htab->elf.sgotplt->size
2308 - elf_i386_compute_jump_table_size (htab);
2309 htab->elf.sgotplt->size += 8;
2310 h->got.offset = (bfd_vma) -2;
2311 }
2312 if (! GOT_TLS_GDESC_P (tls_type)
2313 || GOT_TLS_GD_P (tls_type))
2314 {
2315 h->got.offset = s->size;
2316 s->size += 4;
2317 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2318 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2319 s->size += 4;
2320 }
2321 dyn = htab->elf.dynamic_sections_created;
2322 /* R_386_TLS_IE_32 needs one dynamic relocation,
2323 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2324 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2325 need two), R_386_TLS_GD needs one if local symbol and two if
2326 global. */
2327 if (tls_type == GOT_TLS_IE_BOTH)
2328 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2329 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2330 || (tls_type & GOT_TLS_IE))
2331 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2332 else if (GOT_TLS_GD_P (tls_type))
2333 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2334 else if (! GOT_TLS_GDESC_P (tls_type)
2335 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2336 || h->root.type != bfd_link_hash_undefweak)
2337 && (info->shared
2338 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2339 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2340 if (GOT_TLS_GDESC_P (tls_type))
2341 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2342 }
2343 else
2344 h->got.offset = (bfd_vma) -1;
2345
2346 if (eh->dyn_relocs == NULL)
2347 return TRUE;
2348
2349 /* In the shared -Bsymbolic case, discard space allocated for
2350 dynamic pc-relative relocs against symbols which turn out to be
2351 defined in regular objects. For the normal shared case, discard
2352 space for pc-relative relocs that have become local due to symbol
2353 visibility changes. */
2354
2355 if (info->shared)
2356 {
2357 /* The only reloc that uses pc_count is R_386_PC32, which will
2358 appear on a call or on something like ".long foo - .". We
2359 want calls to protected symbols to resolve directly to the
2360 function rather than going via the plt. If people want
2361 function pointer comparisons to work as expected then they
2362 should avoid writing assembly like ".long foo - .". */
2363 if (SYMBOL_CALLS_LOCAL (info, h))
2364 {
2365 struct elf_dyn_relocs **pp;
2366
2367 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2368 {
2369 p->count -= p->pc_count;
2370 p->pc_count = 0;
2371 if (p->count == 0)
2372 *pp = p->next;
2373 else
2374 pp = &p->next;
2375 }
2376 }
2377
a45ae5f8 2378 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
5796c8dc
SS
2379 {
2380 struct elf_dyn_relocs **pp;
2381 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2382 {
2383 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2384 *pp = p->next;
2385 else
2386 pp = &p->next;
2387 }
2388 }
2389
2390 /* Also discard relocs on undefined weak syms with non-default
2391 visibility. */
2392 if (eh->dyn_relocs != NULL
2393 && h->root.type == bfd_link_hash_undefweak)
2394 {
2395 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2396 eh->dyn_relocs = NULL;
2397
2398 /* Make sure undefined weak symbols are output as a dynamic
2399 symbol in PIEs. */
2400 else if (h->dynindx == -1
2401 && !h->forced_local)
2402 {
2403 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2404 return FALSE;
2405 }
2406 }
2407 }
2408 else if (ELIMINATE_COPY_RELOCS)
2409 {
2410 /* For the non-shared case, discard space for relocs against
2411 symbols which turn out to need copy relocs or are not
2412 dynamic. */
2413
2414 if (!h->non_got_ref
2415 && ((h->def_dynamic
2416 && !h->def_regular)
2417 || (htab->elf.dynamic_sections_created
2418 && (h->root.type == bfd_link_hash_undefweak
2419 || h->root.type == bfd_link_hash_undefined))))
2420 {
2421 /* Make sure this symbol is output as a dynamic symbol.
2422 Undefined weak syms won't yet be marked as dynamic. */
2423 if (h->dynindx == -1
2424 && !h->forced_local)
2425 {
2426 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2427 return FALSE;
2428 }
2429
2430 /* If that succeeded, we know we'll be keeping all the
2431 relocs. */
2432 if (h->dynindx != -1)
2433 goto keep;
2434 }
2435
2436 eh->dyn_relocs = NULL;
2437
2438 keep: ;
2439 }
2440
2441 /* Finally, allocate space. */
2442 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2443 {
2444 asection *sreloc;
2445
2446 sreloc = elf_section_data (p->sec)->sreloc;
2447
2448 BFD_ASSERT (sreloc != NULL);
2449 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2450 }
2451
2452 return TRUE;
2453}
2454
2455/* Allocate space in .plt, .got and associated reloc sections for
2456 local dynamic relocs. */
2457
2458static bfd_boolean
2459elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2460{
2461 struct elf_link_hash_entry *h
2462 = (struct elf_link_hash_entry *) *slot;
2463
2464 if (h->type != STT_GNU_IFUNC
2465 || !h->def_regular
2466 || !h->ref_regular
2467 || !h->forced_local
2468 || h->root.type != bfd_link_hash_defined)
2469 abort ();
2470
2471 return elf_i386_allocate_dynrelocs (h, inf);
2472}
2473
2474/* Find any dynamic relocs that apply to read-only sections. */
2475
2476static bfd_boolean
2477elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2478{
2479 struct elf_i386_link_hash_entry *eh;
2480 struct elf_dyn_relocs *p;
2481
a45ae5f8
JM
2482 /* Skip local IFUNC symbols. */
2483 if (h->forced_local && h->type == STT_GNU_IFUNC)
2484 return TRUE;
5796c8dc
SS
2485
2486 eh = (struct elf_i386_link_hash_entry *) h;
2487 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2488 {
2489 asection *s = p->sec->output_section;
2490
2491 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2492 {
2493 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2494
2495 info->flags |= DF_TEXTREL;
2496
a45ae5f8
JM
2497 if (info->warn_shared_textrel && info->shared)
2498 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2499 p->sec->owner, h->root.root.string,
2500 p->sec);
2501
5796c8dc
SS
2502 /* Not an error, just cut short the traversal. */
2503 return FALSE;
2504 }
2505 }
2506 return TRUE;
2507}
2508
ef5ccd6c
JM
2509/* Convert
2510 mov foo@GOT(%reg), %reg
2511 to
2512 lea foo@GOTOFF(%reg), %reg
2513 with the local symbol, foo. */
2514
2515static bfd_boolean
2516elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec,
2517 struct bfd_link_info *link_info)
2518{
2519 Elf_Internal_Shdr *symtab_hdr;
2520 Elf_Internal_Rela *internal_relocs;
2521 Elf_Internal_Rela *irel, *irelend;
2522 bfd_byte *contents;
2523 struct elf_i386_link_hash_table *htab;
2524 bfd_boolean changed_contents;
2525 bfd_boolean changed_relocs;
2526 bfd_signed_vma *local_got_refcounts;
2527
2528 /* Don't even try to convert non-ELF outputs. */
2529 if (!is_elf_hash_table (link_info->hash))
2530 return FALSE;
2531
2532 /* Nothing to do if there are no codes, no relocations or no output. */
2533 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2534 || sec->reloc_count == 0
2535 || discarded_section (sec))
2536 return TRUE;
2537
2538 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2539
2540 /* Load the relocations for this section. */
2541 internal_relocs = (_bfd_elf_link_read_relocs
2542 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2543 link_info->keep_memory));
2544 if (internal_relocs == NULL)
2545 return FALSE;
2546
2547 htab = elf_i386_hash_table (link_info);
2548 changed_contents = FALSE;
2549 changed_relocs = FALSE;
2550 local_got_refcounts = elf_local_got_refcounts (abfd);
2551
2552 /* Get the section contents. */
2553 if (elf_section_data (sec)->this_hdr.contents != NULL)
2554 contents = elf_section_data (sec)->this_hdr.contents;
2555 else
2556 {
2557 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2558 goto error_return;
2559 }
2560
2561 irelend = internal_relocs + sec->reloc_count;
2562 for (irel = internal_relocs; irel < irelend; irel++)
2563 {
2564 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2565 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2566 unsigned int indx;
2567 struct elf_link_hash_entry *h;
2568
2569 if (r_type != R_386_GOT32)
2570 continue;
2571
2572 /* Get the symbol referred to by the reloc. */
2573 if (r_symndx < symtab_hdr->sh_info)
2574 {
2575 Elf_Internal_Sym *isym;
2576
2577 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2578 abfd, r_symndx);
2579
2580 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2581 if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC
2582 && bfd_get_8 (input_bfd,
2583 contents + irel->r_offset - 2) == 0x8b)
2584 {
2585 bfd_put_8 (output_bfd, 0x8d,
2586 contents + irel->r_offset - 2);
2587 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2588 if (local_got_refcounts != NULL
2589 && local_got_refcounts[r_symndx] > 0)
2590 local_got_refcounts[r_symndx] -= 1;
2591 changed_contents = TRUE;
2592 changed_relocs = TRUE;
2593 }
2594 continue;
2595 }
2596
2597 indx = r_symndx - symtab_hdr->sh_info;
2598 h = elf_sym_hashes (abfd)[indx];
2599 BFD_ASSERT (h != NULL);
2600
2601 while (h->root.type == bfd_link_hash_indirect
2602 || h->root.type == bfd_link_hash_warning)
2603 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2604
2605 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2606 optimizing _DYNAMIC since ld.so may use its link-time address. */
2607 if (h->def_regular
2608 && h->type != STT_GNU_IFUNC
2609 && h != htab->elf.hdynamic
2610 && SYMBOL_REFERENCES_LOCAL (link_info, h)
2611 && bfd_get_8 (input_bfd,
2612 contents + irel->r_offset - 2) == 0x8b)
2613 {
2614 bfd_put_8 (output_bfd, 0x8d,
2615 contents + irel->r_offset - 2);
2616 irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF);
2617 if (h->got.refcount > 0)
2618 h->got.refcount -= 1;
2619 changed_contents = TRUE;
2620 changed_relocs = TRUE;
2621 }
2622 }
2623
2624 if (contents != NULL
2625 && elf_section_data (sec)->this_hdr.contents != contents)
2626 {
2627 if (!changed_contents && !link_info->keep_memory)
2628 free (contents);
2629 else
2630 {
2631 /* Cache the section contents for elf_link_input_bfd. */
2632 elf_section_data (sec)->this_hdr.contents = contents;
2633 }
2634 }
2635
2636 if (elf_section_data (sec)->relocs != internal_relocs)
2637 {
2638 if (!changed_relocs)
2639 free (internal_relocs);
2640 else
2641 elf_section_data (sec)->relocs = internal_relocs;
2642 }
2643
2644 return TRUE;
2645
2646 error_return:
2647 if (contents != NULL
2648 && elf_section_data (sec)->this_hdr.contents != contents)
2649 free (contents);
2650 if (internal_relocs != NULL
2651 && elf_section_data (sec)->relocs != internal_relocs)
2652 free (internal_relocs);
2653 return FALSE;
2654}
2655
5796c8dc
SS
2656/* Set the sizes of the dynamic sections. */
2657
2658static bfd_boolean
a45ae5f8 2659elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
5796c8dc
SS
2660{
2661 struct elf_i386_link_hash_table *htab;
2662 bfd *dynobj;
2663 asection *s;
2664 bfd_boolean relocs;
2665 bfd *ibfd;
2666
2667 htab = elf_i386_hash_table (info);
cf7f2e2d
JM
2668 if (htab == NULL)
2669 return FALSE;
5796c8dc
SS
2670 dynobj = htab->elf.dynobj;
2671 if (dynobj == NULL)
2672 abort ();
2673
2674 if (htab->elf.dynamic_sections_created)
2675 {
2676 /* Set the contents of the .interp section to the interpreter. */
2677 if (info->executable)
2678 {
ef5ccd6c 2679 s = bfd_get_linker_section (dynobj, ".interp");
5796c8dc
SS
2680 if (s == NULL)
2681 abort ();
2682 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2683 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2684 }
2685 }
2686
2687 /* Set up .got offsets for local syms, and space for local dynamic
2688 relocs. */
2689 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2690 {
2691 bfd_signed_vma *local_got;
2692 bfd_signed_vma *end_local_got;
2693 char *local_tls_type;
2694 bfd_vma *local_tlsdesc_gotent;
2695 bfd_size_type locsymcount;
2696 Elf_Internal_Shdr *symtab_hdr;
2697 asection *srel;
2698
2699 if (! is_i386_elf (ibfd))
2700 continue;
2701
2702 for (s = ibfd->sections; s != NULL; s = s->next)
2703 {
2704 struct elf_dyn_relocs *p;
2705
ef5ccd6c
JM
2706 if (!elf_i386_convert_mov_to_lea (ibfd, s, info))
2707 return FALSE;
2708
5796c8dc
SS
2709 for (p = ((struct elf_dyn_relocs *)
2710 elf_section_data (s)->local_dynrel);
2711 p != NULL;
2712 p = p->next)
2713 {
2714 if (!bfd_is_abs_section (p->sec)
2715 && bfd_is_abs_section (p->sec->output_section))
2716 {
2717 /* Input section has been discarded, either because
2718 it is a copy of a linkonce section or due to
2719 linker script /DISCARD/, so we'll be discarding
2720 the relocs too. */
2721 }
a45ae5f8 2722 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
5796c8dc
SS
2723 && strcmp (p->sec->output_section->name,
2724 ".tls_vars") == 0)
2725 {
2726 /* Relocations in vxworks .tls_vars sections are
2727 handled specially by the loader. */
2728 }
2729 else if (p->count != 0)
2730 {
2731 srel = elf_section_data (p->sec)->sreloc;
2732 srel->size += p->count * sizeof (Elf32_External_Rel);
a45ae5f8
JM
2733 if ((p->sec->output_section->flags & SEC_READONLY) != 0
2734 && (info->flags & DF_TEXTREL) == 0)
2735 {
2736 info->flags |= DF_TEXTREL;
2737 if (info->warn_shared_textrel && info->shared)
2738 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2739 p->sec->owner, p->sec);
2740 }
5796c8dc
SS
2741 }
2742 }
2743 }
2744
2745 local_got = elf_local_got_refcounts (ibfd);
2746 if (!local_got)
2747 continue;
2748
2749 symtab_hdr = &elf_symtab_hdr (ibfd);
2750 locsymcount = symtab_hdr->sh_info;
2751 end_local_got = local_got + locsymcount;
2752 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2753 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2754 s = htab->elf.sgot;
2755 srel = htab->elf.srelgot;
2756 for (; local_got < end_local_got;
2757 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2758 {
2759 *local_tlsdesc_gotent = (bfd_vma) -1;
2760 if (*local_got > 0)
2761 {
2762 if (GOT_TLS_GDESC_P (*local_tls_type))
2763 {
2764 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2765 - elf_i386_compute_jump_table_size (htab);
2766 htab->elf.sgotplt->size += 8;
2767 *local_got = (bfd_vma) -2;
2768 }
2769 if (! GOT_TLS_GDESC_P (*local_tls_type)
2770 || GOT_TLS_GD_P (*local_tls_type))
2771 {
2772 *local_got = s->size;
2773 s->size += 4;
2774 if (GOT_TLS_GD_P (*local_tls_type)
2775 || *local_tls_type == GOT_TLS_IE_BOTH)
2776 s->size += 4;
2777 }
2778 if (info->shared
2779 || GOT_TLS_GD_ANY_P (*local_tls_type)
2780 || (*local_tls_type & GOT_TLS_IE))
2781 {
2782 if (*local_tls_type == GOT_TLS_IE_BOTH)
2783 srel->size += 2 * sizeof (Elf32_External_Rel);
2784 else if (GOT_TLS_GD_P (*local_tls_type)
2785 || ! GOT_TLS_GDESC_P (*local_tls_type))
2786 srel->size += sizeof (Elf32_External_Rel);
2787 if (GOT_TLS_GDESC_P (*local_tls_type))
2788 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2789 }
2790 }
2791 else
2792 *local_got = (bfd_vma) -1;
2793 }
2794 }
2795
2796 if (htab->tls_ldm_got.refcount > 0)
2797 {
2798 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2799 relocs. */
2800 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2801 htab->elf.sgot->size += 8;
2802 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2803 }
2804 else
2805 htab->tls_ldm_got.offset = -1;
2806
2807 /* Allocate global sym .plt and .got entries, and space for global
2808 sym dynamic relocs. */
2809 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2810
2811 /* Allocate .plt and .got entries, and space for local symbols. */
2812 htab_traverse (htab->loc_hash_table,
2813 elf_i386_allocate_local_dynrelocs,
2814 info);
2815
2816 /* For every jump slot reserved in the sgotplt, reloc_count is
2817 incremented. However, when we reserve space for TLS descriptors,
2818 it's not incremented, so in order to compute the space reserved
2819 for them, it suffices to multiply the reloc count by the jump
a45ae5f8 2820 slot size.
ef5ccd6c 2821
a45ae5f8
JM
2822 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2823 so that R_386_IRELATIVE entries come last. */
5796c8dc 2824 if (htab->elf.srelplt)
a45ae5f8
JM
2825 {
2826 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
2827 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2828 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
2829 }
2830 else if (htab->elf.irelplt)
2831 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
2832
5796c8dc 2833
c50c785c
JM
2834 if (htab->elf.sgotplt)
2835 {
c50c785c 2836 /* Don't allocate .got.plt section if there are no GOT nor PLT
ef5ccd6c
JM
2837 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2838 if ((htab->elf.hgot == NULL
2839 || !htab->elf.hgot->ref_regular_nonweak)
c50c785c
JM
2840 && (htab->elf.sgotplt->size
2841 == get_elf_backend_data (output_bfd)->got_header_size)
2842 && (htab->elf.splt == NULL
2843 || htab->elf.splt->size == 0)
2844 && (htab->elf.sgot == NULL
2845 || htab->elf.sgot->size == 0)
2846 && (htab->elf.iplt == NULL
2847 || htab->elf.iplt->size == 0)
2848 && (htab->elf.igotplt == NULL
2849 || htab->elf.igotplt->size == 0))
2850 htab->elf.sgotplt->size = 0;
2851 }
2852
ef5ccd6c
JM
2853
2854 if (htab->plt_eh_frame != NULL
2855 && htab->elf.splt != NULL
2856 && htab->elf.splt->size != 0
2857 && !bfd_is_abs_section (htab->elf.splt->output_section)
2858 && _bfd_elf_eh_frame_present (info))
2859 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
2860
5796c8dc
SS
2861 /* We now have determined the sizes of the various dynamic sections.
2862 Allocate memory for them. */
2863 relocs = FALSE;
2864 for (s = dynobj->sections; s != NULL; s = s->next)
2865 {
2866 bfd_boolean strip_section = TRUE;
2867
2868 if ((s->flags & SEC_LINKER_CREATED) == 0)
2869 continue;
2870
2871 if (s == htab->elf.splt
ef5ccd6c 2872 || s == htab->elf.sgot)
5796c8dc
SS
2873 {
2874 /* Strip this section if we don't need it; see the
2875 comment below. */
2876 /* We'd like to strip these sections if they aren't needed, but if
2877 we've exported dynamic symbols from them we must leave them.
2878 It's too late to tell BFD to get rid of the symbols. */
2879
2880 if (htab->elf.hplt != NULL)
2881 strip_section = FALSE;
2882 }
ef5ccd6c
JM
2883 else if (s == htab->elf.sgotplt
2884 || s == htab->elf.iplt
2885 || s == htab->elf.igotplt
2886 || s == htab->plt_eh_frame
2887 || s == htab->sdynbss)
2888 {
2889 /* Strip these too. */
2890 }
5796c8dc
SS
2891 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2892 {
2893 if (s->size != 0
2894 && s != htab->elf.srelplt
2895 && s != htab->srelplt2)
2896 relocs = TRUE;
2897
2898 /* We use the reloc_count field as a counter if we need
2899 to copy relocs into the output file. */
2900 s->reloc_count = 0;
2901 }
2902 else
2903 {
2904 /* It's not one of our sections, so don't allocate space. */
2905 continue;
2906 }
2907
2908 if (s->size == 0)
2909 {
2910 /* If we don't need this section, strip it from the
2911 output file. This is mostly to handle .rel.bss and
2912 .rel.plt. We must create both sections in
2913 create_dynamic_sections, because they must be created
2914 before the linker maps input sections to output
2915 sections. The linker does that before
2916 adjust_dynamic_symbol is called, and it is that
2917 function which decides whether anything needs to go
2918 into these sections. */
2919 if (strip_section)
2920 s->flags |= SEC_EXCLUDE;
2921 continue;
2922 }
2923
2924 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2925 continue;
2926
2927 /* Allocate memory for the section contents. We use bfd_zalloc
2928 here in case unused entries are not reclaimed before the
2929 section's contents are written out. This should not happen,
2930 but this way if it does, we get a R_386_NONE reloc instead
2931 of garbage. */
2932 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2933 if (s->contents == NULL)
2934 return FALSE;
2935 }
2936
a45ae5f8 2937 if (htab->plt_eh_frame != NULL
ef5ccd6c
JM
2938 && htab->plt_eh_frame->contents != NULL)
2939 {
2940 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
2941 sizeof (elf_i386_eh_frame_plt));
2942 bfd_put_32 (dynobj, htab->elf.splt->size,
2943 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
2944 }
a45ae5f8 2945
5796c8dc
SS
2946 if (htab->elf.dynamic_sections_created)
2947 {
2948 /* Add some entries to the .dynamic section. We fill in the
2949 values later, in elf_i386_finish_dynamic_sections, but we
2950 must add the entries now so that we get the correct size for
2951 the .dynamic section. The DT_DEBUG entry is filled in by the
2952 dynamic linker and used by the debugger. */
2953#define add_dynamic_entry(TAG, VAL) \
2954 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2955
2956 if (info->executable)
2957 {
2958 if (!add_dynamic_entry (DT_DEBUG, 0))
2959 return FALSE;
2960 }
2961
2962 if (htab->elf.splt->size != 0)
2963 {
2964 if (!add_dynamic_entry (DT_PLTGOT, 0)
2965 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2966 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2967 || !add_dynamic_entry (DT_JMPREL, 0))
2968 return FALSE;
2969 }
2970
2971 if (relocs)
2972 {
2973 if (!add_dynamic_entry (DT_REL, 0)
2974 || !add_dynamic_entry (DT_RELSZ, 0)
2975 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2976 return FALSE;
2977
2978 /* If any dynamic relocs apply to a read-only section,
2979 then we need a DT_TEXTREL entry. */
2980 if ((info->flags & DF_TEXTREL) == 0)
2981 elf_link_hash_traverse (&htab->elf,
2982 elf_i386_readonly_dynrelocs, info);
2983
2984 if ((info->flags & DF_TEXTREL) != 0)
2985 {
2986 if (!add_dynamic_entry (DT_TEXTREL, 0))
2987 return FALSE;
2988 }
2989 }
a45ae5f8 2990 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
5796c8dc
SS
2991 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2992 return FALSE;
2993 }
2994#undef add_dynamic_entry
2995
2996 return TRUE;
2997}
2998
2999static bfd_boolean
3000elf_i386_always_size_sections (bfd *output_bfd,
3001 struct bfd_link_info *info)
3002{
3003 asection *tls_sec = elf_hash_table (info)->tls_sec;
3004
3005 if (tls_sec)
3006 {
3007 struct elf_link_hash_entry *tlsbase;
3008
3009 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3010 "_TLS_MODULE_BASE_",
3011 FALSE, FALSE, FALSE);
3012
3013 if (tlsbase && tlsbase->type == STT_TLS)
3014 {
cf7f2e2d 3015 struct elf_i386_link_hash_table *htab;
5796c8dc
SS
3016 struct bfd_link_hash_entry *bh = NULL;
3017 const struct elf_backend_data *bed
3018 = get_elf_backend_data (output_bfd);
3019
cf7f2e2d
JM
3020 htab = elf_i386_hash_table (info);
3021 if (htab == NULL)
3022 return FALSE;
3023
5796c8dc
SS
3024 if (!(_bfd_generic_link_add_one_symbol
3025 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3026 tls_sec, 0, NULL, FALSE,
3027 bed->collect, &bh)))
3028 return FALSE;
3029
cf7f2e2d 3030 htab->tls_module_base = bh;
5796c8dc
SS
3031
3032 tlsbase = (struct elf_link_hash_entry *)bh;
3033 tlsbase->def_regular = 1;
3034 tlsbase->other = STV_HIDDEN;
3035 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3036 }
3037 }
3038
3039 return TRUE;
3040}
3041
3042/* Set the correct type for an x86 ELF section. We do this by the
3043 section name, which is a hack, but ought to work. */
3044
3045static bfd_boolean
3046elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3047 Elf_Internal_Shdr *hdr,
3048 asection *sec)
3049{
cf7f2e2d 3050 const char *name;
5796c8dc
SS
3051
3052 name = bfd_get_section_name (abfd, sec);
3053
3054 /* This is an ugly, but unfortunately necessary hack that is
3055 needed when producing EFI binaries on x86. It tells
3056 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3057 containing ELF relocation info. We need this hack in order to
3058 be able to generate ELF binaries that can be translated into
3059 EFI applications (which are essentially COFF objects). Those
3060 files contain a COFF ".reloc" section inside an ELFNN object,
3061 which would normally cause BFD to segfault because it would
3062 attempt to interpret this section as containing relocation
3063 entries for section "oc". With this hack enabled, ".reloc"
3064 will be treated as a normal data section, which will avoid the
3065 segfault. However, you won't be able to create an ELFNN binary
3066 with a section named "oc" that needs relocations, but that's
3067 the kind of ugly side-effects you get when detecting section
3068 types based on their names... In practice, this limitation is
3069 unlikely to bite. */
3070 if (strcmp (name, ".reloc") == 0)
3071 hdr->sh_type = SHT_PROGBITS;
3072
3073 return TRUE;
3074}
3075
3076/* _TLS_MODULE_BASE_ needs to be treated especially when linking
3077 executables. Rather than setting it to the beginning of the TLS
3078 section, we have to set it to the end. This function may be called
3079 multiple times, it is idempotent. */
3080
3081static void
3082elf_i386_set_tls_module_base (struct bfd_link_info *info)
3083{
cf7f2e2d 3084 struct elf_i386_link_hash_table *htab;
5796c8dc
SS
3085 struct bfd_link_hash_entry *base;
3086
3087 if (!info->executable)
3088 return;
3089
cf7f2e2d
JM
3090 htab = elf_i386_hash_table (info);
3091 if (htab == NULL)
3092 return;
5796c8dc 3093
cf7f2e2d
JM
3094 base = htab->tls_module_base;
3095 if (base == NULL)
5796c8dc
SS
3096 return;
3097
cf7f2e2d 3098 base->u.def.value = htab->elf.tls_size;
5796c8dc
SS
3099}
3100
3101/* Return the base VMA address which should be subtracted from real addresses
3102 when resolving @dtpoff relocation.
3103 This is PT_TLS segment p_vaddr. */
3104
3105static bfd_vma
3106elf_i386_dtpoff_base (struct bfd_link_info *info)
3107{
3108 /* If tls_sec is NULL, we should have signalled an error already. */
3109 if (elf_hash_table (info)->tls_sec == NULL)
3110 return 0;
3111 return elf_hash_table (info)->tls_sec->vma;
3112}
3113
3114/* Return the relocation value for @tpoff relocation
3115 if STT_TLS virtual address is ADDRESS. */
3116
3117static bfd_vma
3118elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3119{
3120 struct elf_link_hash_table *htab = elf_hash_table (info);
c50c785c
JM
3121 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3122 bfd_vma static_tls_size;
5796c8dc
SS
3123
3124 /* If tls_sec is NULL, we should have signalled an error already. */
3125 if (htab->tls_sec == NULL)
3126 return 0;
c50c785c
JM
3127
3128 /* Consider special static TLS alignment requirements. */
3129 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3130 return static_tls_size + htab->tls_sec->vma - address;
5796c8dc
SS
3131}
3132
3133/* Relocate an i386 ELF section. */
3134
3135static bfd_boolean
3136elf_i386_relocate_section (bfd *output_bfd,
3137 struct bfd_link_info *info,
3138 bfd *input_bfd,
3139 asection *input_section,
3140 bfd_byte *contents,
3141 Elf_Internal_Rela *relocs,
3142 Elf_Internal_Sym *local_syms,
3143 asection **local_sections)
3144{
3145 struct elf_i386_link_hash_table *htab;
3146 Elf_Internal_Shdr *symtab_hdr;
3147 struct elf_link_hash_entry **sym_hashes;
3148 bfd_vma *local_got_offsets;
3149 bfd_vma *local_tlsdesc_gotents;
3150 Elf_Internal_Rela *rel;
3151 Elf_Internal_Rela *relend;
3152 bfd_boolean is_vxworks_tls;
a45ae5f8 3153 unsigned plt_entry_size;
5796c8dc
SS
3154
3155 BFD_ASSERT (is_i386_elf (input_bfd));
cf7f2e2d 3156
5796c8dc 3157 htab = elf_i386_hash_table (info);
cf7f2e2d
JM
3158 if (htab == NULL)
3159 return FALSE;
5796c8dc
SS
3160 symtab_hdr = &elf_symtab_hdr (input_bfd);
3161 sym_hashes = elf_sym_hashes (input_bfd);
3162 local_got_offsets = elf_local_got_offsets (input_bfd);
3163 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3164 /* We have to handle relocations in vxworks .tls_vars sections
3165 specially, because the dynamic loader is 'weird'. */
a45ae5f8
JM
3166 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3167 && info->shared
5796c8dc
SS
3168 && !strcmp (input_section->output_section->name,
3169 ".tls_vars"));
3170
3171 elf_i386_set_tls_module_base (info);
3172
a45ae5f8
JM
3173 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3174
5796c8dc
SS
3175 rel = relocs;
3176 relend = relocs + input_section->reloc_count;
3177 for (; rel < relend; rel++)
3178 {
3179 unsigned int r_type;
3180 reloc_howto_type *howto;
3181 unsigned long r_symndx;
3182 struct elf_link_hash_entry *h;
3183 Elf_Internal_Sym *sym;
3184 asection *sec;
3185 bfd_vma off, offplt;
3186 bfd_vma relocation;
3187 bfd_boolean unresolved_reloc;
3188 bfd_reloc_status_type r;
3189 unsigned int indx;
3190 int tls_type;
ef5ccd6c 3191 bfd_vma st_size;
5796c8dc
SS
3192
3193 r_type = ELF32_R_TYPE (rel->r_info);
3194 if (r_type == R_386_GNU_VTINHERIT
3195 || r_type == R_386_GNU_VTENTRY)
3196 continue;
3197
3198 if ((indx = r_type) >= R_386_standard
3199 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3200 >= R_386_ext - R_386_standard)
3201 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3202 >= R_386_irelative - R_386_ext))
3203 {
3204 (*_bfd_error_handler)
3205 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3206 input_bfd, input_section, r_type);
3207 bfd_set_error (bfd_error_bad_value);
3208 return FALSE;
3209 }
3210 howto = elf_howto_table + indx;
3211
3212 r_symndx = ELF32_R_SYM (rel->r_info);
3213 h = NULL;
3214 sym = NULL;
3215 sec = NULL;
3216 unresolved_reloc = FALSE;
3217 if (r_symndx < symtab_hdr->sh_info)
3218 {
3219 sym = local_syms + r_symndx;
3220 sec = local_sections[r_symndx];
3221 relocation = (sec->output_section->vma
3222 + sec->output_offset
3223 + sym->st_value);
ef5ccd6c 3224 st_size = sym->st_size;
5796c8dc
SS
3225
3226 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3227 && ((sec->flags & SEC_MERGE) != 0
3228 || (info->relocatable
3229 && sec->output_offset != 0)))
3230 {
3231 bfd_vma addend;
3232 bfd_byte *where = contents + rel->r_offset;
3233
3234 switch (howto->size)
3235 {
3236 case 0:
3237 addend = bfd_get_8 (input_bfd, where);
3238 if (howto->pc_relative)
3239 {
3240 addend = (addend ^ 0x80) - 0x80;
3241 addend += 1;
3242 }
3243 break;
3244 case 1:
3245 addend = bfd_get_16 (input_bfd, where);
3246 if (howto->pc_relative)
3247 {
3248 addend = (addend ^ 0x8000) - 0x8000;
3249 addend += 2;
3250 }
3251 break;
3252 case 2:
3253 addend = bfd_get_32 (input_bfd, where);
3254 if (howto->pc_relative)
3255 {
3256 addend = (addend ^ 0x80000000) - 0x80000000;
3257 addend += 4;
3258 }
3259 break;
3260 default:
3261 abort ();
3262 }
3263
3264 if (info->relocatable)
3265 addend += sec->output_offset;
3266 else
3267 {
3268 asection *msec = sec;
3269 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3270 addend);
3271 addend -= relocation;
3272 addend += msec->output_section->vma + msec->output_offset;
3273 }
3274
3275 switch (howto->size)
3276 {
3277 case 0:
3278 /* FIXME: overflow checks. */
3279 if (howto->pc_relative)
3280 addend -= 1;
3281 bfd_put_8 (input_bfd, addend, where);
3282 break;
3283 case 1:
3284 if (howto->pc_relative)
3285 addend -= 2;
3286 bfd_put_16 (input_bfd, addend, where);
3287 break;
3288 case 2:
3289 if (howto->pc_relative)
3290 addend -= 4;
3291 bfd_put_32 (input_bfd, addend, where);
3292 break;
3293 }
3294 }
3295 else if (!info->relocatable
3296 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3297 {
3298 /* Relocate against local STT_GNU_IFUNC symbol. */
c50c785c
JM
3299 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3300 FALSE);
5796c8dc
SS
3301 if (h == NULL)
3302 abort ();
3303
a45ae5f8 3304 /* Set STT_GNU_IFUNC symbol value. */
5796c8dc
SS
3305 h->root.u.def.value = sym->st_value;
3306 h->root.u.def.section = sec;
3307 }
3308 }
3309 else
3310 {
cf7f2e2d 3311 bfd_boolean warned ATTRIBUTE_UNUSED;
5796c8dc
SS
3312
3313 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3314 r_symndx, symtab_hdr, sym_hashes,
3315 h, sec, relocation,
3316 unresolved_reloc, warned);
ef5ccd6c 3317 st_size = h->size;
5796c8dc
SS
3318 }
3319
ef5ccd6c 3320 if (sec != NULL && discarded_section (sec))
cf7f2e2d 3321 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
ef5ccd6c 3322 rel, 1, relend, howto, 0, contents);
5796c8dc
SS
3323
3324 if (info->relocatable)
3325 continue;
3326
3327 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3328 it here if it is defined in a non-shared object. */
3329 if (h != NULL
3330 && h->type == STT_GNU_IFUNC
3331 && h->def_regular)
3332 {
3333 asection *plt, *gotplt, *base_got;
3334 bfd_vma plt_index;
3335 const char *name;
3336
3337 if ((input_section->flags & SEC_ALLOC) == 0
3338 || h->plt.offset == (bfd_vma) -1)
3339 abort ();
3340
3341 /* STT_GNU_IFUNC symbol must go through PLT. */
3342 if (htab->elf.splt != NULL)
3343 {
3344 plt = htab->elf.splt;
3345 gotplt = htab->elf.sgotplt;
3346 }
3347 else
3348 {
3349 plt = htab->elf.iplt;
3350 gotplt = htab->elf.igotplt;
3351 }
3352
3353 relocation = (plt->output_section->vma
3354 + plt->output_offset + h->plt.offset);
3355
3356 switch (r_type)
3357 {
3358 default:
3359 if (h->root.root.string)
3360 name = h->root.root.string;
3361 else
3362 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3363 NULL);
3364 (*_bfd_error_handler)
3365 (_("%B: relocation %s against STT_GNU_IFUNC "
3366 "symbol `%s' isn't handled by %s"), input_bfd,
3367 elf_howto_table[r_type].name,
3368 name, __FUNCTION__);
3369 bfd_set_error (bfd_error_bad_value);
3370 return FALSE;
3371
3372 case R_386_32:
3373 /* Generate dynamic relcoation only when there is a
a45ae5f8 3374 non-GOT reference in a shared object. */
5796c8dc
SS
3375 if (info->shared && h->non_got_ref)
3376 {
3377 Elf_Internal_Rela outrel;
5796c8dc
SS
3378 asection *sreloc;
3379 bfd_vma offset;
3380
3381 /* Need a dynamic relocation to get the real function
3382 adddress. */
3383 offset = _bfd_elf_section_offset (output_bfd,
3384 info,
3385 input_section,
3386 rel->r_offset);
3387 if (offset == (bfd_vma) -1
3388 || offset == (bfd_vma) -2)
3389 abort ();
3390
3391 outrel.r_offset = (input_section->output_section->vma
3392 + input_section->output_offset
3393 + offset);
3394
3395 if (h->dynindx == -1
3396 || h->forced_local
3397 || info->executable)
3398 {
3399 /* This symbol is resolved locally. */
ef5ccd6c
JM
3400 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3401 bfd_put_32 (output_bfd,
3402 (h->root.u.def.value
3403 + h->root.u.def.section->output_section->vma
3404 + h->root.u.def.section->output_offset),
3405 contents + offset);
5796c8dc
SS
3406 }
3407 else
ef5ccd6c 3408 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
5796c8dc
SS
3409
3410 sreloc = htab->elf.irelifunc;
ef5ccd6c 3411 elf_append_rel (output_bfd, sreloc, &outrel);
5796c8dc
SS
3412
3413 /* If this reloc is against an external symbol, we
3414 do not want to fiddle with the addend. Otherwise,
3415 we need to include the symbol value so that it
3416 becomes an addend for the dynamic reloc. For an
3417 internal symbol, we have updated addend. */
ef5ccd6c 3418 continue;
5796c8dc 3419 }
c50c785c 3420 /* FALLTHROUGH */
5796c8dc
SS
3421 case R_386_PC32:
3422 case R_386_PLT32:
3423 goto do_relocation;
3424
3425 case R_386_GOT32:
3426 base_got = htab->elf.sgot;
3427 off = h->got.offset;
3428
3429 if (base_got == NULL)
3430 abort ();
3431
3432 if (off == (bfd_vma) -1)
3433 {
3434 /* We can't use h->got.offset here to save state, or
3435 even just remember the offset, as finish_dynamic_symbol
3436 would use that as offset into .got. */
cf7f2e2d 3437
5796c8dc
SS
3438 if (htab->elf.splt != NULL)
3439 {
a45ae5f8 3440 plt_index = h->plt.offset / plt_entry_size - 1;
5796c8dc
SS
3441 off = (plt_index + 3) * 4;
3442 base_got = htab->elf.sgotplt;
3443 }
3444 else
3445 {
a45ae5f8 3446 plt_index = h->plt.offset / plt_entry_size;
5796c8dc
SS
3447 off = plt_index * 4;
3448 base_got = htab->elf.igotplt;
3449 }
3450
3451 if (h->dynindx == -1
3452 || h->forced_local
3453 || info->symbolic)
3454 {
3455 /* This references the local defitionion. We must
3456 initialize this entry in the global offset table.
3457 Since the offset must always be a multiple of 8,
3458 we use the least significant bit to record
3459 whether we have initialized it already.
3460
3461 When doing a dynamic link, we create a .rela.got
3462 relocation entry to initialize the value. This
3463 is done in the finish_dynamic_symbol routine. */
3464 if ((off & 1) != 0)
3465 off &= ~1;
3466 else
3467 {
3468 bfd_put_32 (output_bfd, relocation,
3469 base_got->contents + off);
3470 h->got.offset |= 1;
3471 }
3472 }
3473
3474 relocation = off;
3475
3476 /* Adjust for static executables. */
3477 if (htab->elf.splt == NULL)
3478 relocation += gotplt->output_offset;
3479 }
3480 else
3481 {
3482 relocation = (base_got->output_section->vma
3483 + base_got->output_offset + off
3484 - gotplt->output_section->vma
3485 - gotplt->output_offset);
3486 /* Adjust for static executables. */
3487 if (htab->elf.splt == NULL)
3488 relocation += gotplt->output_offset;
3489 }
3490
3491 goto do_relocation;
3492
3493 case R_386_GOTOFF:
3494 relocation -= (gotplt->output_section->vma
3495 + gotplt->output_offset);
3496 goto do_relocation;
3497 }
3498 }
3499
3500 switch (r_type)
3501 {
3502 case R_386_GOT32:
3503 /* Relocation is to the entry for this symbol in the global
3504 offset table. */
3505 if (htab->elf.sgot == NULL)
3506 abort ();
3507
3508 if (h != NULL)
3509 {
3510 bfd_boolean dyn;
3511
3512 off = h->got.offset;
3513 dyn = htab->elf.dynamic_sections_created;
3514 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3515 || (info->shared
3516 && SYMBOL_REFERENCES_LOCAL (info, h))
3517 || (ELF_ST_VISIBILITY (h->other)
3518 && h->root.type == bfd_link_hash_undefweak))
3519 {
3520 /* This is actually a static link, or it is a
3521 -Bsymbolic link and the symbol is defined
3522 locally, or the symbol was forced to be local
3523 because of a version file. We must initialize
3524 this entry in the global offset table. Since the
3525 offset must always be a multiple of 4, we use the
3526 least significant bit to record whether we have
3527 initialized it already.
3528
3529 When doing a dynamic link, we create a .rel.got
3530 relocation entry to initialize the value. This
3531 is done in the finish_dynamic_symbol routine. */
3532 if ((off & 1) != 0)
3533 off &= ~1;
3534 else
3535 {
3536 bfd_put_32 (output_bfd, relocation,
3537 htab->elf.sgot->contents + off);
3538 h->got.offset |= 1;
3539 }
3540 }
3541 else
3542 unresolved_reloc = FALSE;
3543 }
3544 else
3545 {
3546 if (local_got_offsets == NULL)
3547 abort ();
3548
3549 off = local_got_offsets[r_symndx];
3550
3551 /* The offset must always be a multiple of 4. We use
3552 the least significant bit to record whether we have
3553 already generated the necessary reloc. */
3554 if ((off & 1) != 0)
3555 off &= ~1;
3556 else
3557 {
3558 bfd_put_32 (output_bfd, relocation,
3559 htab->elf.sgot->contents + off);
3560
3561 if (info->shared)
3562 {
3563 asection *s;
3564 Elf_Internal_Rela outrel;
5796c8dc
SS
3565
3566 s = htab->elf.srelgot;
3567 if (s == NULL)
3568 abort ();
3569
3570 outrel.r_offset = (htab->elf.sgot->output_section->vma
3571 + htab->elf.sgot->output_offset
3572 + off);
3573 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
ef5ccd6c 3574 elf_append_rel (output_bfd, s, &outrel);
5796c8dc
SS
3575 }
3576
3577 local_got_offsets[r_symndx] |= 1;
3578 }
3579 }
3580
3581 if (off >= (bfd_vma) -2)
3582 abort ();
3583
3584 relocation = htab->elf.sgot->output_section->vma
3585 + htab->elf.sgot->output_offset + off
3586 - htab->elf.sgotplt->output_section->vma
3587 - htab->elf.sgotplt->output_offset;
3588 break;
3589
3590 case R_386_GOTOFF:
3591 /* Relocation is relative to the start of the global offset
3592 table. */
3593
3594 /* Check to make sure it isn't a protected function symbol
3595 for shared library since it may not be local when used
3596 as function address. We also need to make sure that a
3597 symbol is defined locally. */
3598 if (info->shared && h)
3599 {
3600 if (!h->def_regular)
3601 {
3602 const char *v;
3603
3604 switch (ELF_ST_VISIBILITY (h->other))
3605 {
3606 case STV_HIDDEN:
3607 v = _("hidden symbol");
3608 break;
3609 case STV_INTERNAL:
3610 v = _("internal symbol");
3611 break;
3612 case STV_PROTECTED:
3613 v = _("protected symbol");
3614 break;
3615 default:
3616 v = _("symbol");
3617 break;
3618 }
3619
3620 (*_bfd_error_handler)
3621 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3622 input_bfd, v, h->root.root.string);
3623 bfd_set_error (bfd_error_bad_value);
3624 return FALSE;
3625 }
3626 else if (!info->executable
ef5ccd6c 3627 && !SYMBOLIC_BIND (info, h)
5796c8dc
SS
3628 && h->type == STT_FUNC
3629 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3630 {
3631 (*_bfd_error_handler)
3632 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3633 input_bfd, h->root.root.string);
3634 bfd_set_error (bfd_error_bad_value);
3635 return FALSE;
3636 }
3637 }
3638
3639 /* Note that sgot is not involved in this
3640 calculation. We always want the start of .got.plt. If we
3641 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3642 permitted by the ABI, we might have to change this
3643 calculation. */
3644 relocation -= htab->elf.sgotplt->output_section->vma
3645 + htab->elf.sgotplt->output_offset;
3646 break;
3647
3648 case R_386_GOTPC:
3649 /* Use global offset table as symbol value. */
3650 relocation = htab->elf.sgotplt->output_section->vma
3651 + htab->elf.sgotplt->output_offset;
3652 unresolved_reloc = FALSE;
3653 break;
3654
3655 case R_386_PLT32:
3656 /* Relocation is to the entry for this symbol in the
3657 procedure linkage table. */
3658
3659 /* Resolve a PLT32 reloc against a local symbol directly,
3660 without using the procedure linkage table. */
3661 if (h == NULL)
3662 break;
3663
3664 if (h->plt.offset == (bfd_vma) -1
3665 || htab->elf.splt == NULL)
3666 {
3667 /* We didn't make a PLT entry for this symbol. This
3668 happens when statically linking PIC code, or when
3669 using -Bsymbolic. */
3670 break;
3671 }
3672
3673 relocation = (htab->elf.splt->output_section->vma
3674 + htab->elf.splt->output_offset
3675 + h->plt.offset);
3676 unresolved_reloc = FALSE;
3677 break;
3678
ef5ccd6c
JM
3679 case R_386_SIZE32:
3680 /* Set to symbol size. */
3681 relocation = st_size;
3682 /* Fall through. */
3683
5796c8dc
SS
3684 case R_386_32:
3685 case R_386_PC32:
3686 if ((input_section->flags & SEC_ALLOC) == 0
3687 || is_vxworks_tls)
3688 break;
3689
3690 if ((info->shared
3691 && (h == NULL
3692 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3693 || h->root.type != bfd_link_hash_undefweak)
ef5ccd6c 3694 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
5796c8dc
SS
3695 || !SYMBOL_CALLS_LOCAL (info, h)))
3696 || (ELIMINATE_COPY_RELOCS
3697 && !info->shared
3698 && h != NULL
3699 && h->dynindx != -1
3700 && !h->non_got_ref
3701 && ((h->def_dynamic
3702 && !h->def_regular)
3703 || h->root.type == bfd_link_hash_undefweak
3704 || h->root.type == bfd_link_hash_undefined)))
3705 {
3706 Elf_Internal_Rela outrel;
5796c8dc
SS
3707 bfd_boolean skip, relocate;
3708 asection *sreloc;
3709
3710 /* When generating a shared object, these relocations
3711 are copied into the output file to be resolved at run
3712 time. */
3713
3714 skip = FALSE;
3715 relocate = FALSE;
3716
3717 outrel.r_offset =
3718 _bfd_elf_section_offset (output_bfd, info, input_section,
3719 rel->r_offset);
3720 if (outrel.r_offset == (bfd_vma) -1)
3721 skip = TRUE;
3722 else if (outrel.r_offset == (bfd_vma) -2)
3723 skip = TRUE, relocate = TRUE;
3724 outrel.r_offset += (input_section->output_section->vma
3725 + input_section->output_offset);
3726
3727 if (skip)
3728 memset (&outrel, 0, sizeof outrel);
3729 else if (h != NULL
3730 && h->dynindx != -1
3731 && (r_type == R_386_PC32
3732 || !info->shared
3733 || !SYMBOLIC_BIND (info, h)
3734 || !h->def_regular))
3735 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3736 else
3737 {
3738 /* This symbol is local, or marked to become local. */
3739 relocate = TRUE;
3740 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3741 }
3742
3743 sreloc = elf_section_data (input_section)->sreloc;
3744
a45ae5f8
JM
3745 if (sreloc == NULL || sreloc->contents == NULL)
3746 {
3747 r = bfd_reloc_notsupported;
3748 goto check_relocation_error;
3749 }
579