]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blob - bfd/elfnn-ia64.c
Move struc-symbol.h to symbols.c
[thirdparty/binutils-gdb.git] / bfd / elfnn-ia64.c
1 /* IA-64 support for 64-bit ELF
2 Copyright (C) 1998-2018 Free Software Foundation, Inc.
3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "bfd.h"
24 #include "libbfd.h"
25 #include "elf-bfd.h"
26 #include "opcode/ia64.h"
27 #include "elf/ia64.h"
28 #include "objalloc.h"
29 #include "hashtab.h"
30 #include "bfd_stdint.h"
31 #include "elfxx-ia64.h"
32
33 #define ARCH_SIZE NN
34
35 #if ARCH_SIZE == 64
36 #define LOG_SECTION_ALIGN 3
37 #endif
38
39 #if ARCH_SIZE == 32
40 #define LOG_SECTION_ALIGN 2
41 #endif
42
43 typedef struct bfd_hash_entry *(*new_hash_entry_func)
44 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
45
46 /* In dynamically (linker-) created sections, we generally need to keep track
47 of the place a symbol or expression got allocated to. This is done via hash
48 tables that store entries of the following type. */
49
50 struct elfNN_ia64_dyn_sym_info
51 {
52 /* The addend for which this entry is relevant. */
53 bfd_vma addend;
54
55 bfd_vma got_offset;
56 bfd_vma fptr_offset;
57 bfd_vma pltoff_offset;
58 bfd_vma plt_offset;
59 bfd_vma plt2_offset;
60 bfd_vma tprel_offset;
61 bfd_vma dtpmod_offset;
62 bfd_vma dtprel_offset;
63
64 /* The symbol table entry, if any, that this was derived from. */
65 struct elf_link_hash_entry *h;
66
67 /* Used to count non-got, non-plt relocations for delayed sizing
68 of relocation sections. */
69 struct elfNN_ia64_dyn_reloc_entry
70 {
71 struct elfNN_ia64_dyn_reloc_entry *next;
72 asection *srel;
73 int type;
74 int count;
75
76 /* Is this reloc against readonly section? */
77 bfd_boolean reltext;
78 } *reloc_entries;
79
80 /* TRUE when the section contents have been updated. */
81 unsigned got_done : 1;
82 unsigned fptr_done : 1;
83 unsigned pltoff_done : 1;
84 unsigned tprel_done : 1;
85 unsigned dtpmod_done : 1;
86 unsigned dtprel_done : 1;
87
88 /* TRUE for the different kinds of linker data we want created. */
89 unsigned want_got : 1;
90 unsigned want_gotx : 1;
91 unsigned want_fptr : 1;
92 unsigned want_ltoff_fptr : 1;
93 unsigned want_plt : 1;
94 unsigned want_plt2 : 1;
95 unsigned want_pltoff : 1;
96 unsigned want_tprel : 1;
97 unsigned want_dtpmod : 1;
98 unsigned want_dtprel : 1;
99 };
100
101 struct elfNN_ia64_local_hash_entry
102 {
103 int id;
104 unsigned int r_sym;
105 /* The number of elements in elfNN_ia64_dyn_sym_info array. */
106 unsigned int count;
107 /* The number of sorted elements in elfNN_ia64_dyn_sym_info array. */
108 unsigned int sorted_count;
109 /* The size of elfNN_ia64_dyn_sym_info array. */
110 unsigned int size;
111 /* The array of elfNN_ia64_dyn_sym_info. */
112 struct elfNN_ia64_dyn_sym_info *info;
113
114 /* TRUE if this hash entry's addends was translated for
115 SHF_MERGE optimization. */
116 unsigned sec_merge_done : 1;
117 };
118
119 struct elfNN_ia64_link_hash_entry
120 {
121 struct elf_link_hash_entry root;
122 /* The number of elements in elfNN_ia64_dyn_sym_info array. */
123 unsigned int count;
124 /* The number of sorted elements in elfNN_ia64_dyn_sym_info array. */
125 unsigned int sorted_count;
126 /* The size of elfNN_ia64_dyn_sym_info array. */
127 unsigned int size;
128 /* The array of elfNN_ia64_dyn_sym_info. */
129 struct elfNN_ia64_dyn_sym_info *info;
130 };
131
132 struct elfNN_ia64_link_hash_table
133 {
134 /* The main hash table. */
135 struct elf_link_hash_table root;
136
137 asection *fptr_sec; /* Function descriptor table (or NULL). */
138 asection *rel_fptr_sec; /* Dynamic relocation section for same. */
139 asection *pltoff_sec; /* Private descriptors for plt (or NULL). */
140 asection *rel_pltoff_sec; /* Dynamic relocation section for same. */
141
142 bfd_size_type minplt_entries; /* Number of minplt entries. */
143 unsigned reltext : 1; /* Are there relocs against readonly sections? */
144 unsigned self_dtpmod_done : 1;/* Has self DTPMOD entry been finished? */
145 bfd_vma self_dtpmod_offset; /* .got offset to self DTPMOD entry. */
146 /* There are maybe R_IA64_GPREL22 relocations, including those
147 optimized from R_IA64_LTOFF22X, against non-SHF_IA_64_SHORT
148 sections. We need to record those sections so that we can choose
149 a proper GP to cover all R_IA64_GPREL22 relocations. */
150 asection *max_short_sec; /* Maximum short output section. */
151 bfd_vma max_short_offset; /* Maximum short offset. */
152 asection *min_short_sec; /* Minimum short output section. */
153 bfd_vma min_short_offset; /* Minimum short offset. */
154
155 htab_t loc_hash_table;
156 void *loc_hash_memory;
157 };
158
159 struct elfNN_ia64_allocate_data
160 {
161 struct bfd_link_info *info;
162 bfd_size_type ofs;
163 bfd_boolean only_got;
164 };
165
166 #define elfNN_ia64_hash_table(p) \
167 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
168 == IA64_ELF_DATA ? ((struct elfNN_ia64_link_hash_table *) ((p)->hash)) : NULL)
169
170 static struct elfNN_ia64_dyn_sym_info * get_dyn_sym_info
171 (struct elfNN_ia64_link_hash_table *ia64_info,
172 struct elf_link_hash_entry *h,
173 bfd *abfd, const Elf_Internal_Rela *rel, bfd_boolean create);
174 static bfd_boolean elfNN_ia64_dynamic_symbol_p
175 (struct elf_link_hash_entry *h, struct bfd_link_info *info, int);
176 static bfd_boolean elfNN_ia64_choose_gp
177 (bfd *abfd, struct bfd_link_info *info, bfd_boolean final);
178 static void elfNN_ia64_dyn_sym_traverse
179 (struct elfNN_ia64_link_hash_table *ia64_info,
180 bfd_boolean (*func) (struct elfNN_ia64_dyn_sym_info *, void *),
181 void * info);
182 static bfd_boolean allocate_global_data_got
183 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data);
184 static bfd_boolean allocate_global_fptr_got
185 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data);
186 static bfd_boolean allocate_local_got
187 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data);
188 static bfd_boolean elfNN_ia64_hpux_vec
189 (const bfd_target *vec);
190 static bfd_boolean allocate_dynrel_entries
191 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data);
192 static asection *get_pltoff
193 (bfd *abfd, struct bfd_link_info *info,
194 struct elfNN_ia64_link_hash_table *ia64_info);
195 \f
196 /* ia64-specific relocation. */
197
198 /* Given a ELF reloc, return the matching HOWTO structure. */
199
200 static bfd_boolean
201 elfNN_ia64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
202 arelent *bfd_reloc,
203 Elf_Internal_Rela *elf_reloc)
204 {
205 unsigned int r_type = ELF32_R_TYPE (elf_reloc->r_info);
206
207 bfd_reloc->howto = ia64_elf_lookup_howto (r_type);
208 if (bfd_reloc->howto == NULL)
209 {
210 /* xgettext:c-format */
211 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
212 abfd, r_type);
213 bfd_set_error (bfd_error_bad_value);
214 return FALSE;
215 }
216
217 return TRUE;
218 }
219 \f
220 #define PLT_HEADER_SIZE (3 * 16)
221 #define PLT_MIN_ENTRY_SIZE (1 * 16)
222 #define PLT_FULL_ENTRY_SIZE (2 * 16)
223 #define PLT_RESERVED_WORDS 3
224
225 static const bfd_byte plt_header[PLT_HEADER_SIZE] =
226 {
227 0x0b, 0x10, 0x00, 0x1c, 0x00, 0x21, /* [MMI] mov r2=r14;; */
228 0xe0, 0x00, 0x08, 0x00, 0x48, 0x00, /* addl r14=0,r2 */
229 0x00, 0x00, 0x04, 0x00, /* nop.i 0x0;; */
230 0x0b, 0x80, 0x20, 0x1c, 0x18, 0x14, /* [MMI] ld8 r16=[r14],8;; */
231 0x10, 0x41, 0x38, 0x30, 0x28, 0x00, /* ld8 r17=[r14],8 */
232 0x00, 0x00, 0x04, 0x00, /* nop.i 0x0;; */
233 0x11, 0x08, 0x00, 0x1c, 0x18, 0x10, /* [MIB] ld8 r1=[r14] */
234 0x60, 0x88, 0x04, 0x80, 0x03, 0x00, /* mov b6=r17 */
235 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */
236 };
237
238 static const bfd_byte plt_min_entry[PLT_MIN_ENTRY_SIZE] =
239 {
240 0x11, 0x78, 0x00, 0x00, 0x00, 0x24, /* [MIB] mov r15=0 */
241 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, /* nop.i 0x0 */
242 0x00, 0x00, 0x00, 0x40 /* br.few 0 <PLT0>;; */
243 };
244
245 static const bfd_byte plt_full_entry[PLT_FULL_ENTRY_SIZE] =
246 {
247 0x0b, 0x78, 0x00, 0x02, 0x00, 0x24, /* [MMI] addl r15=0,r1;; */
248 0x00, 0x41, 0x3c, 0x70, 0x29, 0xc0, /* ld8.acq r16=[r15],8*/
249 0x01, 0x08, 0x00, 0x84, /* mov r14=r1;; */
250 0x11, 0x08, 0x00, 0x1e, 0x18, 0x10, /* [MIB] ld8 r1=[r15] */
251 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */
252 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */
253 };
254
255 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
256
257 static const bfd_byte oor_brl[16] =
258 {
259 0x05, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */
260 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* brl.sptk.few tgt;; */
261 0x00, 0x00, 0x00, 0xc0
262 };
263
264 static const bfd_byte oor_ip[48] =
265 {
266 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */
267 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, /* movl r15=0 */
268 0x01, 0x00, 0x00, 0x60,
269 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MII] nop.m 0 */
270 0x00, 0x01, 0x00, 0x60, 0x00, 0x00, /* mov r16=ip;; */
271 0xf2, 0x80, 0x00, 0x80, /* add r16=r15,r16;; */
272 0x11, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MIB] nop.m 0 */
273 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */
274 0x60, 0x00, 0x80, 0x00 /* br b6;; */
275 };
276
277 static size_t oor_branch_size = sizeof (oor_brl);
278
279 void
280 bfd_elfNN_ia64_after_parse (int itanium)
281 {
282 oor_branch_size = itanium ? sizeof (oor_ip) : sizeof (oor_brl);
283 }
284 \f
285
286 /* Rename some of the generic section flags to better document how they
287 are used here. */
288 #define skip_relax_pass_0 sec_flg0
289 #define skip_relax_pass_1 sec_flg1
290
291 /* These functions do relaxation for IA-64 ELF. */
292
293 static void
294 elfNN_ia64_update_short_info (asection *sec, bfd_vma offset,
295 struct elfNN_ia64_link_hash_table *ia64_info)
296 {
297 /* Skip ABS and SHF_IA_64_SHORT sections. */
298 if (sec == bfd_abs_section_ptr
299 || (sec->flags & SEC_SMALL_DATA) != 0)
300 return;
301
302 if (!ia64_info->min_short_sec)
303 {
304 ia64_info->max_short_sec = sec;
305 ia64_info->max_short_offset = offset;
306 ia64_info->min_short_sec = sec;
307 ia64_info->min_short_offset = offset;
308 }
309 else if (sec == ia64_info->max_short_sec
310 && offset > ia64_info->max_short_offset)
311 ia64_info->max_short_offset = offset;
312 else if (sec == ia64_info->min_short_sec
313 && offset < ia64_info->min_short_offset)
314 ia64_info->min_short_offset = offset;
315 else if (sec->output_section->vma
316 > ia64_info->max_short_sec->vma)
317 {
318 ia64_info->max_short_sec = sec;
319 ia64_info->max_short_offset = offset;
320 }
321 else if (sec->output_section->vma
322 < ia64_info->min_short_sec->vma)
323 {
324 ia64_info->min_short_sec = sec;
325 ia64_info->min_short_offset = offset;
326 }
327 }
328
329 static bfd_boolean
330 elfNN_ia64_relax_section (bfd *abfd, asection *sec,
331 struct bfd_link_info *link_info,
332 bfd_boolean *again)
333 {
334 struct one_fixup
335 {
336 struct one_fixup *next;
337 asection *tsec;
338 bfd_vma toff;
339 bfd_vma trampoff;
340 };
341
342 Elf_Internal_Shdr *symtab_hdr;
343 Elf_Internal_Rela *internal_relocs;
344 Elf_Internal_Rela *irel, *irelend;
345 bfd_byte *contents;
346 Elf_Internal_Sym *isymbuf = NULL;
347 struct elfNN_ia64_link_hash_table *ia64_info;
348 struct one_fixup *fixups = NULL;
349 bfd_boolean changed_contents = FALSE;
350 bfd_boolean changed_relocs = FALSE;
351 bfd_boolean changed_got = FALSE;
352 bfd_boolean skip_relax_pass_0 = TRUE;
353 bfd_boolean skip_relax_pass_1 = TRUE;
354 bfd_vma gp = 0;
355
356 /* Assume we're not going to change any sizes, and we'll only need
357 one pass. */
358 *again = FALSE;
359
360 if (bfd_link_relocatable (link_info))
361 (*link_info->callbacks->einfo)
362 (_("%P%F: --relax and -r may not be used together\n"));
363
364 /* Don't even try to relax for non-ELF outputs. */
365 if (!is_elf_hash_table (link_info->hash))
366 return FALSE;
367
368 /* Nothing to do if there are no relocations or there is no need for
369 the current pass. */
370 if ((sec->flags & SEC_RELOC) == 0
371 || sec->reloc_count == 0
372 || (link_info->relax_pass == 0 && sec->skip_relax_pass_0)
373 || (link_info->relax_pass == 1 && sec->skip_relax_pass_1))
374 return TRUE;
375
376 ia64_info = elfNN_ia64_hash_table (link_info);
377 if (ia64_info == NULL)
378 return FALSE;
379
380 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
381
382 /* Load the relocations for this section. */
383 internal_relocs = (_bfd_elf_link_read_relocs
384 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
385 link_info->keep_memory));
386 if (internal_relocs == NULL)
387 return FALSE;
388
389 irelend = internal_relocs + sec->reloc_count;
390
391 /* Get the section contents. */
392 if (elf_section_data (sec)->this_hdr.contents != NULL)
393 contents = elf_section_data (sec)->this_hdr.contents;
394 else
395 {
396 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
397 goto error_return;
398 }
399
400 for (irel = internal_relocs; irel < irelend; irel++)
401 {
402 unsigned long r_type = ELFNN_R_TYPE (irel->r_info);
403 bfd_vma symaddr, reladdr, trampoff, toff, roff;
404 asection *tsec;
405 struct one_fixup *f;
406 bfd_size_type amt;
407 bfd_boolean is_branch;
408 struct elfNN_ia64_dyn_sym_info *dyn_i;
409 char symtype;
410
411 switch (r_type)
412 {
413 case R_IA64_PCREL21B:
414 case R_IA64_PCREL21BI:
415 case R_IA64_PCREL21M:
416 case R_IA64_PCREL21F:
417 /* In pass 1, all br relaxations are done. We can skip it. */
418 if (link_info->relax_pass == 1)
419 continue;
420 skip_relax_pass_0 = FALSE;
421 is_branch = TRUE;
422 break;
423
424 case R_IA64_PCREL60B:
425 /* We can't optimize brl to br in pass 0 since br relaxations
426 will increase the code size. Defer it to pass 1. */
427 if (link_info->relax_pass == 0)
428 {
429 skip_relax_pass_1 = FALSE;
430 continue;
431 }
432 is_branch = TRUE;
433 break;
434
435 case R_IA64_GPREL22:
436 /* Update max_short_sec/min_short_sec. */
437
438 case R_IA64_LTOFF22X:
439 case R_IA64_LDXMOV:
440 /* We can't relax ldx/mov in pass 0 since br relaxations will
441 increase the code size. Defer it to pass 1. */
442 if (link_info->relax_pass == 0)
443 {
444 skip_relax_pass_1 = FALSE;
445 continue;
446 }
447 is_branch = FALSE;
448 break;
449
450 default:
451 continue;
452 }
453
454 /* Get the value of the symbol referred to by the reloc. */
455 if (ELFNN_R_SYM (irel->r_info) < symtab_hdr->sh_info)
456 {
457 /* A local symbol. */
458 Elf_Internal_Sym *isym;
459
460 /* Read this BFD's local symbols. */
461 if (isymbuf == NULL)
462 {
463 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
464 if (isymbuf == NULL)
465 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
466 symtab_hdr->sh_info, 0,
467 NULL, NULL, NULL);
468 if (isymbuf == 0)
469 goto error_return;
470 }
471
472 isym = isymbuf + ELFNN_R_SYM (irel->r_info);
473 if (isym->st_shndx == SHN_UNDEF)
474 continue; /* We can't do anything with undefined symbols. */
475 else if (isym->st_shndx == SHN_ABS)
476 tsec = bfd_abs_section_ptr;
477 else if (isym->st_shndx == SHN_COMMON)
478 tsec = bfd_com_section_ptr;
479 else if (isym->st_shndx == SHN_IA_64_ANSI_COMMON)
480 tsec = bfd_com_section_ptr;
481 else
482 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
483
484 toff = isym->st_value;
485 dyn_i = get_dyn_sym_info (ia64_info, NULL, abfd, irel, FALSE);
486 symtype = ELF_ST_TYPE (isym->st_info);
487 }
488 else
489 {
490 unsigned long indx;
491 struct elf_link_hash_entry *h;
492
493 indx = ELFNN_R_SYM (irel->r_info) - symtab_hdr->sh_info;
494 h = elf_sym_hashes (abfd)[indx];
495 BFD_ASSERT (h != NULL);
496
497 while (h->root.type == bfd_link_hash_indirect
498 || h->root.type == bfd_link_hash_warning)
499 h = (struct elf_link_hash_entry *) h->root.u.i.link;
500
501 dyn_i = get_dyn_sym_info (ia64_info, h, abfd, irel, FALSE);
502
503 /* For branches to dynamic symbols, we're interested instead
504 in a branch to the PLT entry. */
505 if (is_branch && dyn_i && dyn_i->want_plt2)
506 {
507 /* Internal branches shouldn't be sent to the PLT.
508 Leave this for now and we'll give an error later. */
509 if (r_type != R_IA64_PCREL21B)
510 continue;
511
512 tsec = ia64_info->root.splt;
513 toff = dyn_i->plt2_offset;
514 BFD_ASSERT (irel->r_addend == 0);
515 }
516
517 /* Can't do anything else with dynamic symbols. */
518 else if (elfNN_ia64_dynamic_symbol_p (h, link_info, r_type))
519 continue;
520
521 else
522 {
523 /* We can't do anything with undefined symbols. */
524 if (h->root.type == bfd_link_hash_undefined
525 || h->root.type == bfd_link_hash_undefweak)
526 continue;
527
528 tsec = h->root.u.def.section;
529 toff = h->root.u.def.value;
530 }
531
532 symtype = h->type;
533 }
534
535 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
536 {
537 /* At this stage in linking, no SEC_MERGE symbol has been
538 adjusted, so all references to such symbols need to be
539 passed through _bfd_merged_section_offset. (Later, in
540 relocate_section, all SEC_MERGE symbols *except* for
541 section symbols have been adjusted.)
542
543 gas may reduce relocations against symbols in SEC_MERGE
544 sections to a relocation against the section symbol when
545 the original addend was zero. When the reloc is against
546 a section symbol we should include the addend in the
547 offset passed to _bfd_merged_section_offset, since the
548 location of interest is the original symbol. On the
549 other hand, an access to "sym+addend" where "sym" is not
550 a section symbol should not include the addend; Such an
551 access is presumed to be an offset from "sym"; The
552 location of interest is just "sym". */
553 if (symtype == STT_SECTION)
554 toff += irel->r_addend;
555
556 toff = _bfd_merged_section_offset (abfd, &tsec,
557 elf_section_data (tsec)->sec_info,
558 toff);
559
560 if (symtype != STT_SECTION)
561 toff += irel->r_addend;
562 }
563 else
564 toff += irel->r_addend;
565
566 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
567
568 roff = irel->r_offset;
569
570 if (is_branch)
571 {
572 bfd_signed_vma offset;
573
574 reladdr = (sec->output_section->vma
575 + sec->output_offset
576 + roff) & (bfd_vma) -4;
577
578 /* The .plt section is aligned at 32byte and the .text section
579 is aligned at 64byte. The .text section is right after the
580 .plt section. After the first relaxation pass, linker may
581 increase the gap between the .plt and .text sections up
582 to 32byte. We assume linker will always insert 32byte
583 between the .plt and .text sections after the first
584 relaxation pass. */
585 if (tsec == ia64_info->root.splt)
586 offset = -0x1000000 + 32;
587 else
588 offset = -0x1000000;
589
590 /* If the branch is in range, no need to do anything. */
591 if ((bfd_signed_vma) (symaddr - reladdr) >= offset
592 && (bfd_signed_vma) (symaddr - reladdr) <= 0x0FFFFF0)
593 {
594 /* If the 60-bit branch is in 21-bit range, optimize it. */
595 if (r_type == R_IA64_PCREL60B)
596 {
597 ia64_elf_relax_brl (contents, roff);
598
599 irel->r_info
600 = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
601 R_IA64_PCREL21B);
602
603 /* If the original relocation offset points to slot
604 1, change it to slot 2. */
605 if ((irel->r_offset & 3) == 1)
606 irel->r_offset += 1;
607
608 changed_contents = TRUE;
609 changed_relocs = TRUE;
610 }
611
612 continue;
613 }
614 else if (r_type == R_IA64_PCREL60B)
615 continue;
616 else if (ia64_elf_relax_br (contents, roff))
617 {
618 irel->r_info
619 = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
620 R_IA64_PCREL60B);
621
622 /* Make the relocation offset point to slot 1. */
623 irel->r_offset = (irel->r_offset & ~((bfd_vma) 0x3)) + 1;
624
625 changed_contents = TRUE;
626 changed_relocs = TRUE;
627 continue;
628 }
629
630 /* We can't put a trampoline in a .init/.fini section. Issue
631 an error. */
632 if (strcmp (sec->output_section->name, ".init") == 0
633 || strcmp (sec->output_section->name, ".fini") == 0)
634 {
635 _bfd_error_handler
636 /* xgettext:c-format */
637 (_("%pB: can't relax br at %#" PRIx64 " in section `%pA';"
638 " please use brl or indirect branch"),
639 sec->owner, (uint64_t) roff, sec);
640 bfd_set_error (bfd_error_bad_value);
641 goto error_return;
642 }
643
644 /* If the branch and target are in the same section, you've
645 got one honking big section and we can't help you unless
646 you are branching backwards. You'll get an error message
647 later. */
648 if (tsec == sec && toff > roff)
649 continue;
650
651 /* Look for an existing fixup to this address. */
652 for (f = fixups; f ; f = f->next)
653 if (f->tsec == tsec && f->toff == toff)
654 break;
655
656 if (f == NULL)
657 {
658 /* Two alternatives: If it's a branch to a PLT entry, we can
659 make a copy of the FULL_PLT entry. Otherwise, we'll have
660 to use a `brl' insn to get where we're going. */
661
662 size_t size;
663
664 if (tsec == ia64_info->root.splt)
665 size = sizeof (plt_full_entry);
666 else
667 size = oor_branch_size;
668
669 /* Resize the current section to make room for the new branch. */
670 trampoff = (sec->size + 15) & (bfd_vma) -16;
671
672 /* If trampoline is out of range, there is nothing we
673 can do. */
674 offset = trampoff - (roff & (bfd_vma) -4);
675 if (offset < -0x1000000 || offset > 0x0FFFFF0)
676 continue;
677
678 amt = trampoff + size;
679 contents = (bfd_byte *) bfd_realloc (contents, amt);
680 if (contents == NULL)
681 goto error_return;
682 sec->size = amt;
683
684 if (tsec == ia64_info->root.splt)
685 {
686 memcpy (contents + trampoff, plt_full_entry, size);
687
688 /* Hijack the old relocation for use as the PLTOFF reloc. */
689 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
690 R_IA64_PLTOFF22);
691 irel->r_offset = trampoff;
692 }
693 else
694 {
695 if (size == sizeof (oor_ip))
696 {
697 memcpy (contents + trampoff, oor_ip, size);
698 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
699 R_IA64_PCREL64I);
700 irel->r_addend -= 16;
701 irel->r_offset = trampoff + 2;
702 }
703 else
704 {
705 memcpy (contents + trampoff, oor_brl, size);
706 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
707 R_IA64_PCREL60B);
708 irel->r_offset = trampoff + 2;
709 }
710
711 }
712
713 /* Record the fixup so we don't do it again this section. */
714 f = (struct one_fixup *)
715 bfd_malloc ((bfd_size_type) sizeof (*f));
716 f->next = fixups;
717 f->tsec = tsec;
718 f->toff = toff;
719 f->trampoff = trampoff;
720 fixups = f;
721 }
722 else
723 {
724 /* If trampoline is out of range, there is nothing we
725 can do. */
726 offset = f->trampoff - (roff & (bfd_vma) -4);
727 if (offset < -0x1000000 || offset > 0x0FFFFF0)
728 continue;
729
730 /* Nop out the reloc, since we're finalizing things here. */
731 irel->r_info = ELFNN_R_INFO (0, R_IA64_NONE);
732 }
733
734 /* Fix up the existing branch to hit the trampoline. */
735 if (ia64_elf_install_value (contents + roff, offset, r_type)
736 != bfd_reloc_ok)
737 goto error_return;
738
739 changed_contents = TRUE;
740 changed_relocs = TRUE;
741 }
742 else
743 {
744 /* Fetch the gp. */
745 if (gp == 0)
746 {
747 bfd *obfd = sec->output_section->owner;
748 gp = _bfd_get_gp_value (obfd);
749 if (gp == 0)
750 {
751 if (!elfNN_ia64_choose_gp (obfd, link_info, FALSE))
752 goto error_return;
753 gp = _bfd_get_gp_value (obfd);
754 }
755 }
756
757 /* If the data is out of range, do nothing. */
758 if ((bfd_signed_vma) (symaddr - gp) >= 0x200000
759 ||(bfd_signed_vma) (symaddr - gp) < -0x200000)
760 continue;
761
762 if (r_type == R_IA64_GPREL22)
763 elfNN_ia64_update_short_info (tsec->output_section,
764 tsec->output_offset + toff,
765 ia64_info);
766 else if (r_type == R_IA64_LTOFF22X)
767 {
768 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
769 R_IA64_GPREL22);
770 changed_relocs = TRUE;
771 if (dyn_i->want_gotx)
772 {
773 dyn_i->want_gotx = 0;
774 changed_got |= !dyn_i->want_got;
775 }
776
777 elfNN_ia64_update_short_info (tsec->output_section,
778 tsec->output_offset + toff,
779 ia64_info);
780 }
781 else
782 {
783 ia64_elf_relax_ldxmov (contents, roff);
784 irel->r_info = ELFNN_R_INFO (0, R_IA64_NONE);
785 changed_contents = TRUE;
786 changed_relocs = TRUE;
787 }
788 }
789 }
790
791 /* ??? If we created fixups, this may push the code segment large
792 enough that the data segment moves, which will change the GP.
793 Reset the GP so that we re-calculate next round. We need to
794 do this at the _beginning_ of the next round; now will not do. */
795
796 /* Clean up and go home. */
797 while (fixups)
798 {
799 struct one_fixup *f = fixups;
800 fixups = fixups->next;
801 free (f);
802 }
803
804 if (isymbuf != NULL
805 && symtab_hdr->contents != (unsigned char *) isymbuf)
806 {
807 if (! link_info->keep_memory)
808 free (isymbuf);
809 else
810 {
811 /* Cache the symbols for elf_link_input_bfd. */
812 symtab_hdr->contents = (unsigned char *) isymbuf;
813 }
814 }
815
816 if (contents != NULL
817 && elf_section_data (sec)->this_hdr.contents != contents)
818 {
819 if (!changed_contents && !link_info->keep_memory)
820 free (contents);
821 else
822 {
823 /* Cache the section contents for elf_link_input_bfd. */
824 elf_section_data (sec)->this_hdr.contents = contents;
825 }
826 }
827
828 if (elf_section_data (sec)->relocs != internal_relocs)
829 {
830 if (!changed_relocs)
831 free (internal_relocs);
832 else
833 elf_section_data (sec)->relocs = internal_relocs;
834 }
835
836 if (changed_got)
837 {
838 struct elfNN_ia64_allocate_data data;
839 data.info = link_info;
840 data.ofs = 0;
841 ia64_info->self_dtpmod_offset = (bfd_vma) -1;
842
843 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data);
844 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data);
845 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data);
846 ia64_info->root.sgot->size = data.ofs;
847
848 if (ia64_info->root.dynamic_sections_created
849 && ia64_info->root.srelgot != NULL)
850 {
851 /* Resize .rela.got. */
852 ia64_info->root.srelgot->size = 0;
853 if (bfd_link_pic (link_info)
854 && ia64_info->self_dtpmod_offset != (bfd_vma) -1)
855 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
856 data.only_got = TRUE;
857 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_dynrel_entries,
858 &data);
859 }
860 }
861
862 if (link_info->relax_pass == 0)
863 {
864 /* Pass 0 is only needed to relax br. */
865 sec->skip_relax_pass_0 = skip_relax_pass_0;
866 sec->skip_relax_pass_1 = skip_relax_pass_1;
867 }
868
869 *again = changed_contents || changed_relocs;
870 return TRUE;
871
872 error_return:
873 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
874 free (isymbuf);
875 if (contents != NULL
876 && elf_section_data (sec)->this_hdr.contents != contents)
877 free (contents);
878 if (internal_relocs != NULL
879 && elf_section_data (sec)->relocs != internal_relocs)
880 free (internal_relocs);
881 return FALSE;
882 }
883 #undef skip_relax_pass_0
884 #undef skip_relax_pass_1
885 \f
886 /* Return TRUE if NAME is an unwind table section name. */
887
888 static inline bfd_boolean
889 is_unwind_section_name (bfd *abfd, const char *name)
890 {
891 if (elfNN_ia64_hpux_vec (abfd->xvec)
892 && !strcmp (name, ELF_STRING_ia64_unwind_hdr))
893 return FALSE;
894
895 return ((CONST_STRNEQ (name, ELF_STRING_ia64_unwind)
896 && ! CONST_STRNEQ (name, ELF_STRING_ia64_unwind_info))
897 || CONST_STRNEQ (name, ELF_STRING_ia64_unwind_once));
898 }
899
900 /* Handle an IA-64 specific section when reading an object file. This
901 is called when bfd_section_from_shdr finds a section with an unknown
902 type. */
903
904 static bfd_boolean
905 elfNN_ia64_section_from_shdr (bfd *abfd,
906 Elf_Internal_Shdr *hdr,
907 const char *name,
908 int shindex)
909 {
910 /* There ought to be a place to keep ELF backend specific flags, but
911 at the moment there isn't one. We just keep track of the
912 sections by their name, instead. Fortunately, the ABI gives
913 suggested names for all the MIPS specific sections, so we will
914 probably get away with this. */
915 switch (hdr->sh_type)
916 {
917 case SHT_IA_64_UNWIND:
918 case SHT_IA_64_HP_OPT_ANOT:
919 break;
920
921 case SHT_IA_64_EXT:
922 if (strcmp (name, ELF_STRING_ia64_archext) != 0)
923 return FALSE;
924 break;
925
926 default:
927 return FALSE;
928 }
929
930 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
931 return FALSE;
932
933 return TRUE;
934 }
935
936 /* Convert IA-64 specific section flags to bfd internal section flags. */
937
938 /* ??? There is no bfd internal flag equivalent to the SHF_IA_64_NORECOV
939 flag. */
940
941 static bfd_boolean
942 elfNN_ia64_section_flags (flagword *flags,
943 const Elf_Internal_Shdr *hdr)
944 {
945 if (hdr->sh_flags & SHF_IA_64_SHORT)
946 *flags |= SEC_SMALL_DATA;
947
948 return TRUE;
949 }
950
951 /* Set the correct type for an IA-64 ELF section. We do this by the
952 section name, which is a hack, but ought to work. */
953
954 static bfd_boolean
955 elfNN_ia64_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr,
956 asection *sec)
957 {
958 const char *name;
959
960 name = bfd_get_section_name (abfd, sec);
961
962 if (is_unwind_section_name (abfd, name))
963 {
964 /* We don't have the sections numbered at this point, so sh_info
965 is set later, in elfNN_ia64_final_write_processing. */
966 hdr->sh_type = SHT_IA_64_UNWIND;
967 hdr->sh_flags |= SHF_LINK_ORDER;
968 }
969 else if (strcmp (name, ELF_STRING_ia64_archext) == 0)
970 hdr->sh_type = SHT_IA_64_EXT;
971 else if (strcmp (name, ".HP.opt_annot") == 0)
972 hdr->sh_type = SHT_IA_64_HP_OPT_ANOT;
973 else if (strcmp (name, ".reloc") == 0)
974 /* This is an ugly, but unfortunately necessary hack that is
975 needed when producing EFI binaries on IA-64. It tells
976 elf.c:elf_fake_sections() not to consider ".reloc" as a section
977 containing ELF relocation info. We need this hack in order to
978 be able to generate ELF binaries that can be translated into
979 EFI applications (which are essentially COFF objects). Those
980 files contain a COFF ".reloc" section inside an ELFNN object,
981 which would normally cause BFD to segfault because it would
982 attempt to interpret this section as containing relocation
983 entries for section "oc". With this hack enabled, ".reloc"
984 will be treated as a normal data section, which will avoid the
985 segfault. However, you won't be able to create an ELFNN binary
986 with a section named "oc" that needs relocations, but that's
987 the kind of ugly side-effects you get when detecting section
988 types based on their names... In practice, this limitation is
989 unlikely to bite. */
990 hdr->sh_type = SHT_PROGBITS;
991
992 if (sec->flags & SEC_SMALL_DATA)
993 hdr->sh_flags |= SHF_IA_64_SHORT;
994
995 /* Some HP linkers look for the SHF_IA_64_HP_TLS flag instead of SHF_TLS. */
996
997 if (elfNN_ia64_hpux_vec (abfd->xvec) && (sec->flags & SHF_TLS))
998 hdr->sh_flags |= SHF_IA_64_HP_TLS;
999
1000 return TRUE;
1001 }
1002
1003 /* The final processing done just before writing out an IA-64 ELF
1004 object file. */
1005
1006 static void
1007 elfNN_ia64_final_write_processing (bfd *abfd,
1008 bfd_boolean linker ATTRIBUTE_UNUSED)
1009 {
1010 Elf_Internal_Shdr *hdr;
1011 asection *s;
1012
1013 for (s = abfd->sections; s; s = s->next)
1014 {
1015 hdr = &elf_section_data (s)->this_hdr;
1016 switch (hdr->sh_type)
1017 {
1018 case SHT_IA_64_UNWIND:
1019 /* The IA-64 processor-specific ABI requires setting sh_link
1020 to the unwind section, whereas HP-UX requires sh_info to
1021 do so. For maximum compatibility, we'll set both for
1022 now... */
1023 hdr->sh_info = hdr->sh_link;
1024 break;
1025 }
1026 }
1027
1028 if (! elf_flags_init (abfd))
1029 {
1030 unsigned long flags = 0;
1031
1032 if (abfd->xvec->byteorder == BFD_ENDIAN_BIG)
1033 flags |= EF_IA_64_BE;
1034 if (bfd_get_mach (abfd) == bfd_mach_ia64_elf64)
1035 flags |= EF_IA_64_ABI64;
1036
1037 elf_elfheader(abfd)->e_flags = flags;
1038 elf_flags_init (abfd) = TRUE;
1039 }
1040 }
1041
1042 /* Hook called by the linker routine which adds symbols from an object
1043 file. We use it to put .comm items in .sbss, and not .bss. */
1044
1045 static bfd_boolean
1046 elfNN_ia64_add_symbol_hook (bfd *abfd,
1047 struct bfd_link_info *info,
1048 Elf_Internal_Sym *sym,
1049 const char **namep ATTRIBUTE_UNUSED,
1050 flagword *flagsp ATTRIBUTE_UNUSED,
1051 asection **secp,
1052 bfd_vma *valp)
1053 {
1054 if (sym->st_shndx == SHN_COMMON
1055 && !bfd_link_relocatable (info)
1056 && sym->st_size <= elf_gp_size (abfd))
1057 {
1058 /* Common symbols less than or equal to -G nn bytes are
1059 automatically put into .sbss. */
1060
1061 asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
1062
1063 if (scomm == NULL)
1064 {
1065 scomm = bfd_make_section_with_flags (abfd, ".scommon",
1066 (SEC_ALLOC
1067 | SEC_IS_COMMON
1068 | SEC_LINKER_CREATED));
1069 if (scomm == NULL)
1070 return FALSE;
1071 }
1072
1073 *secp = scomm;
1074 *valp = sym->st_size;
1075 }
1076
1077 return TRUE;
1078 }
1079
1080 /* Return the number of additional phdrs we will need. */
1081
1082 static int
1083 elfNN_ia64_additional_program_headers (bfd *abfd,
1084 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1085 {
1086 asection *s;
1087 int ret = 0;
1088
1089 /* See if we need a PT_IA_64_ARCHEXT segment. */
1090 s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_archext);
1091 if (s && (s->flags & SEC_LOAD))
1092 ++ret;
1093
1094 /* Count how many PT_IA_64_UNWIND segments we need. */
1095 for (s = abfd->sections; s; s = s->next)
1096 if (is_unwind_section_name (abfd, s->name) && (s->flags & SEC_LOAD))
1097 ++ret;
1098
1099 return ret;
1100 }
1101
1102 static bfd_boolean
1103 elfNN_ia64_modify_segment_map (bfd *abfd,
1104 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1105 {
1106 struct elf_segment_map *m, **pm;
1107 Elf_Internal_Shdr *hdr;
1108 asection *s;
1109
1110 /* If we need a PT_IA_64_ARCHEXT segment, it must come before
1111 all PT_LOAD segments. */
1112 s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_archext);
1113 if (s && (s->flags & SEC_LOAD))
1114 {
1115 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
1116 if (m->p_type == PT_IA_64_ARCHEXT)
1117 break;
1118 if (m == NULL)
1119 {
1120 m = ((struct elf_segment_map *)
1121 bfd_zalloc (abfd, (bfd_size_type) sizeof *m));
1122 if (m == NULL)
1123 return FALSE;
1124
1125 m->p_type = PT_IA_64_ARCHEXT;
1126 m->count = 1;
1127 m->sections[0] = s;
1128
1129 /* We want to put it after the PHDR and INTERP segments. */
1130 pm = &elf_seg_map (abfd);
1131 while (*pm != NULL
1132 && ((*pm)->p_type == PT_PHDR
1133 || (*pm)->p_type == PT_INTERP))
1134 pm = &(*pm)->next;
1135
1136 m->next = *pm;
1137 *pm = m;
1138 }
1139 }
1140
1141 /* Install PT_IA_64_UNWIND segments, if needed. */
1142 for (s = abfd->sections; s; s = s->next)
1143 {
1144 hdr = &elf_section_data (s)->this_hdr;
1145 if (hdr->sh_type != SHT_IA_64_UNWIND)
1146 continue;
1147
1148 if (s && (s->flags & SEC_LOAD))
1149 {
1150 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
1151 if (m->p_type == PT_IA_64_UNWIND)
1152 {
1153 int i;
1154
1155 /* Look through all sections in the unwind segment
1156 for a match since there may be multiple sections
1157 to a segment. */
1158 for (i = m->count - 1; i >= 0; --i)
1159 if (m->sections[i] == s)
1160 break;
1161
1162 if (i >= 0)
1163 break;
1164 }
1165
1166 if (m == NULL)
1167 {
1168 m = ((struct elf_segment_map *)
1169 bfd_zalloc (abfd, (bfd_size_type) sizeof *m));
1170 if (m == NULL)
1171 return FALSE;
1172
1173 m->p_type = PT_IA_64_UNWIND;
1174 m->count = 1;
1175 m->sections[0] = s;
1176 m->next = NULL;
1177
1178 /* We want to put it last. */
1179 pm = &elf_seg_map (abfd);
1180 while (*pm != NULL)
1181 pm = &(*pm)->next;
1182 *pm = m;
1183 }
1184 }
1185 }
1186
1187 return TRUE;
1188 }
1189
1190 /* Turn on PF_IA_64_NORECOV if needed. This involves traversing all of
1191 the input sections for each output section in the segment and testing
1192 for SHF_IA_64_NORECOV on each. */
1193
1194 static bfd_boolean
1195 elfNN_ia64_modify_program_headers (bfd *abfd,
1196 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1197 {
1198 struct elf_obj_tdata *tdata = elf_tdata (abfd);
1199 struct elf_segment_map *m;
1200 Elf_Internal_Phdr *p;
1201
1202 for (p = tdata->phdr, m = elf_seg_map (abfd); m != NULL; m = m->next, p++)
1203 if (m->p_type == PT_LOAD)
1204 {
1205 int i;
1206 for (i = m->count - 1; i >= 0; --i)
1207 {
1208 struct bfd_link_order *order = m->sections[i]->map_head.link_order;
1209
1210 while (order != NULL)
1211 {
1212 if (order->type == bfd_indirect_link_order)
1213 {
1214 asection *is = order->u.indirect.section;
1215 bfd_vma flags = elf_section_data(is)->this_hdr.sh_flags;
1216 if (flags & SHF_IA_64_NORECOV)
1217 {
1218 p->p_flags |= PF_IA_64_NORECOV;
1219 goto found;
1220 }
1221 }
1222 order = order->next;
1223 }
1224 }
1225 found:;
1226 }
1227
1228 return TRUE;
1229 }
1230
1231 /* According to the Tahoe assembler spec, all labels starting with a
1232 '.' are local. */
1233
1234 static bfd_boolean
1235 elfNN_ia64_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
1236 const char *name)
1237 {
1238 return name[0] == '.';
1239 }
1240
1241 /* Should we do dynamic things to this symbol? */
1242
1243 static bfd_boolean
1244 elfNN_ia64_dynamic_symbol_p (struct elf_link_hash_entry *h,
1245 struct bfd_link_info *info, int r_type)
1246 {
1247 bfd_boolean ignore_protected
1248 = ((r_type & 0xf8) == 0x40 /* FPTR relocs */
1249 || (r_type & 0xf8) == 0x50); /* LTOFF_FPTR relocs */
1250
1251 return _bfd_elf_dynamic_symbol_p (h, info, ignore_protected);
1252 }
1253 \f
1254 static struct bfd_hash_entry*
1255 elfNN_ia64_new_elf_hash_entry (struct bfd_hash_entry *entry,
1256 struct bfd_hash_table *table,
1257 const char *string)
1258 {
1259 struct elfNN_ia64_link_hash_entry *ret;
1260 ret = (struct elfNN_ia64_link_hash_entry *) entry;
1261
1262 /* Allocate the structure if it has not already been allocated by a
1263 subclass. */
1264 if (!ret)
1265 ret = bfd_hash_allocate (table, sizeof (*ret));
1266
1267 if (!ret)
1268 return 0;
1269
1270 /* Call the allocation method of the superclass. */
1271 ret = ((struct elfNN_ia64_link_hash_entry *)
1272 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1273 table, string));
1274
1275 ret->info = NULL;
1276 ret->count = 0;
1277 ret->sorted_count = 0;
1278 ret->size = 0;
1279 return (struct bfd_hash_entry *) ret;
1280 }
1281
1282 static void
1283 elfNN_ia64_hash_copy_indirect (struct bfd_link_info *info,
1284 struct elf_link_hash_entry *xdir,
1285 struct elf_link_hash_entry *xind)
1286 {
1287 struct elfNN_ia64_link_hash_entry *dir, *ind;
1288
1289 dir = (struct elfNN_ia64_link_hash_entry *) xdir;
1290 ind = (struct elfNN_ia64_link_hash_entry *) xind;
1291
1292 /* Copy down any references that we may have already seen to the
1293 symbol which just became indirect. */
1294
1295 if (dir->root.versioned != versioned_hidden)
1296 dir->root.ref_dynamic |= ind->root.ref_dynamic;
1297 dir->root.ref_regular |= ind->root.ref_regular;
1298 dir->root.ref_regular_nonweak |= ind->root.ref_regular_nonweak;
1299 dir->root.needs_plt |= ind->root.needs_plt;
1300
1301 if (ind->root.root.type != bfd_link_hash_indirect)
1302 return;
1303
1304 /* Copy over the got and plt data. This would have been done
1305 by check_relocs. */
1306
1307 if (ind->info != NULL)
1308 {
1309 struct elfNN_ia64_dyn_sym_info *dyn_i;
1310 unsigned int count;
1311
1312 if (dir->info)
1313 free (dir->info);
1314
1315 dir->info = ind->info;
1316 dir->count = ind->count;
1317 dir->sorted_count = ind->sorted_count;
1318 dir->size = ind->size;
1319
1320 ind->info = NULL;
1321 ind->count = 0;
1322 ind->sorted_count = 0;
1323 ind->size = 0;
1324
1325 /* Fix up the dyn_sym_info pointers to the global symbol. */
1326 for (count = dir->count, dyn_i = dir->info;
1327 count != 0;
1328 count--, dyn_i++)
1329 dyn_i->h = &dir->root;
1330 }
1331
1332 /* Copy over the dynindx. */
1333
1334 if (ind->root.dynindx != -1)
1335 {
1336 if (dir->root.dynindx != -1)
1337 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1338 dir->root.dynstr_index);
1339 dir->root.dynindx = ind->root.dynindx;
1340 dir->root.dynstr_index = ind->root.dynstr_index;
1341 ind->root.dynindx = -1;
1342 ind->root.dynstr_index = 0;
1343 }
1344 }
1345
1346 static void
1347 elfNN_ia64_hash_hide_symbol (struct bfd_link_info *info,
1348 struct elf_link_hash_entry *xh,
1349 bfd_boolean force_local)
1350 {
1351 struct elfNN_ia64_link_hash_entry *h;
1352 struct elfNN_ia64_dyn_sym_info *dyn_i;
1353 unsigned int count;
1354
1355 h = (struct elfNN_ia64_link_hash_entry *)xh;
1356
1357 _bfd_elf_link_hash_hide_symbol (info, &h->root, force_local);
1358
1359 for (count = h->count, dyn_i = h->info;
1360 count != 0;
1361 count--, dyn_i++)
1362 {
1363 dyn_i->want_plt2 = 0;
1364 dyn_i->want_plt = 0;
1365 }
1366 }
1367
1368 /* Compute a hash of a local hash entry. */
1369
1370 static hashval_t
1371 elfNN_ia64_local_htab_hash (const void *ptr)
1372 {
1373 struct elfNN_ia64_local_hash_entry *entry
1374 = (struct elfNN_ia64_local_hash_entry *) ptr;
1375
1376 return ELF_LOCAL_SYMBOL_HASH (entry->id, entry->r_sym);
1377 }
1378
1379 /* Compare local hash entries. */
1380
1381 static int
1382 elfNN_ia64_local_htab_eq (const void *ptr1, const void *ptr2)
1383 {
1384 struct elfNN_ia64_local_hash_entry *entry1
1385 = (struct elfNN_ia64_local_hash_entry *) ptr1;
1386 struct elfNN_ia64_local_hash_entry *entry2
1387 = (struct elfNN_ia64_local_hash_entry *) ptr2;
1388
1389 return entry1->id == entry2->id && entry1->r_sym == entry2->r_sym;
1390 }
1391
1392 /* Free the global elfNN_ia64_dyn_sym_info array. */
1393
1394 static bfd_boolean
1395 elfNN_ia64_global_dyn_info_free (void **xentry,
1396 void * unused ATTRIBUTE_UNUSED)
1397 {
1398 struct elfNN_ia64_link_hash_entry *entry
1399 = (struct elfNN_ia64_link_hash_entry *) xentry;
1400
1401 if (entry->info)
1402 {
1403 free (entry->info);
1404 entry->info = NULL;
1405 entry->count = 0;
1406 entry->sorted_count = 0;
1407 entry->size = 0;
1408 }
1409
1410 return TRUE;
1411 }
1412
1413 /* Free the local elfNN_ia64_dyn_sym_info array. */
1414
1415 static bfd_boolean
1416 elfNN_ia64_local_dyn_info_free (void **slot,
1417 void * unused ATTRIBUTE_UNUSED)
1418 {
1419 struct elfNN_ia64_local_hash_entry *entry
1420 = (struct elfNN_ia64_local_hash_entry *) *slot;
1421
1422 if (entry->info)
1423 {
1424 free (entry->info);
1425 entry->info = NULL;
1426 entry->count = 0;
1427 entry->sorted_count = 0;
1428 entry->size = 0;
1429 }
1430
1431 return TRUE;
1432 }
1433
1434 /* Destroy IA-64 linker hash table. */
1435
1436 static void
1437 elfNN_ia64_link_hash_table_free (bfd *obfd)
1438 {
1439 struct elfNN_ia64_link_hash_table *ia64_info
1440 = (struct elfNN_ia64_link_hash_table *) obfd->link.hash;
1441 if (ia64_info->loc_hash_table)
1442 {
1443 htab_traverse (ia64_info->loc_hash_table,
1444 elfNN_ia64_local_dyn_info_free, NULL);
1445 htab_delete (ia64_info->loc_hash_table);
1446 }
1447 if (ia64_info->loc_hash_memory)
1448 objalloc_free ((struct objalloc *) ia64_info->loc_hash_memory);
1449 elf_link_hash_traverse (&ia64_info->root,
1450 elfNN_ia64_global_dyn_info_free, NULL);
1451 _bfd_elf_link_hash_table_free (obfd);
1452 }
1453
1454 /* Create the derived linker hash table. The IA-64 ELF port uses this
1455 derived hash table to keep information specific to the IA-64 ElF
1456 linker (without using static variables). */
1457
1458 static struct bfd_link_hash_table *
1459 elfNN_ia64_hash_table_create (bfd *abfd)
1460 {
1461 struct elfNN_ia64_link_hash_table *ret;
1462
1463 ret = bfd_zmalloc ((bfd_size_type) sizeof (*ret));
1464 if (!ret)
1465 return NULL;
1466
1467 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
1468 elfNN_ia64_new_elf_hash_entry,
1469 sizeof (struct elfNN_ia64_link_hash_entry),
1470 IA64_ELF_DATA))
1471 {
1472 free (ret);
1473 return NULL;
1474 }
1475
1476 ret->loc_hash_table = htab_try_create (1024, elfNN_ia64_local_htab_hash,
1477 elfNN_ia64_local_htab_eq, NULL);
1478 ret->loc_hash_memory = objalloc_create ();
1479 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1480 {
1481 elfNN_ia64_link_hash_table_free (abfd);
1482 return NULL;
1483 }
1484 ret->root.root.hash_table_free = elfNN_ia64_link_hash_table_free;
1485
1486 return &ret->root.root;
1487 }
1488
1489 /* Traverse both local and global hash tables. */
1490
1491 struct elfNN_ia64_dyn_sym_traverse_data
1492 {
1493 bfd_boolean (*func) (struct elfNN_ia64_dyn_sym_info *, void *);
1494 void * data;
1495 };
1496
1497 static bfd_boolean
1498 elfNN_ia64_global_dyn_sym_thunk (struct bfd_hash_entry *xentry,
1499 void * xdata)
1500 {
1501 struct elfNN_ia64_link_hash_entry *entry
1502 = (struct elfNN_ia64_link_hash_entry *) xentry;
1503 struct elfNN_ia64_dyn_sym_traverse_data *data
1504 = (struct elfNN_ia64_dyn_sym_traverse_data *) xdata;
1505 struct elfNN_ia64_dyn_sym_info *dyn_i;
1506 unsigned int count;
1507
1508 for (count = entry->count, dyn_i = entry->info;
1509 count != 0;
1510 count--, dyn_i++)
1511 if (! (*data->func) (dyn_i, data->data))
1512 return FALSE;
1513 return TRUE;
1514 }
1515
1516 static bfd_boolean
1517 elfNN_ia64_local_dyn_sym_thunk (void **slot, void * xdata)
1518 {
1519 struct elfNN_ia64_local_hash_entry *entry
1520 = (struct elfNN_ia64_local_hash_entry *) *slot;
1521 struct elfNN_ia64_dyn_sym_traverse_data *data
1522 = (struct elfNN_ia64_dyn_sym_traverse_data *) xdata;
1523 struct elfNN_ia64_dyn_sym_info *dyn_i;
1524 unsigned int count;
1525
1526 for (count = entry->count, dyn_i = entry->info;
1527 count != 0;
1528 count--, dyn_i++)
1529 if (! (*data->func) (dyn_i, data->data))
1530 return FALSE;
1531 return TRUE;
1532 }
1533
1534 static void
1535 elfNN_ia64_dyn_sym_traverse (struct elfNN_ia64_link_hash_table *ia64_info,
1536 bfd_boolean (*func) (struct elfNN_ia64_dyn_sym_info *, void *),
1537 void * data)
1538 {
1539 struct elfNN_ia64_dyn_sym_traverse_data xdata;
1540
1541 xdata.func = func;
1542 xdata.data = data;
1543
1544 elf_link_hash_traverse (&ia64_info->root,
1545 elfNN_ia64_global_dyn_sym_thunk, &xdata);
1546 htab_traverse (ia64_info->loc_hash_table,
1547 elfNN_ia64_local_dyn_sym_thunk, &xdata);
1548 }
1549 \f
1550 static bfd_boolean
1551 elfNN_ia64_create_dynamic_sections (bfd *abfd,
1552 struct bfd_link_info *info)
1553 {
1554 struct elfNN_ia64_link_hash_table *ia64_info;
1555 asection *s;
1556
1557 if (! _bfd_elf_create_dynamic_sections (abfd, info))
1558 return FALSE;
1559
1560 ia64_info = elfNN_ia64_hash_table (info);
1561 if (ia64_info == NULL)
1562 return FALSE;
1563
1564 {
1565 flagword flags = bfd_get_section_flags (abfd, ia64_info->root.sgot);
1566 bfd_set_section_flags (abfd, ia64_info->root.sgot,
1567 SEC_SMALL_DATA | flags);
1568 /* The .got section is always aligned at 8 bytes. */
1569 if (! bfd_set_section_alignment (abfd, ia64_info->root.sgot, 3))
1570 return FALSE;
1571 }
1572
1573 if (!get_pltoff (abfd, info, ia64_info))
1574 return FALSE;
1575
1576 s = bfd_make_section_anyway_with_flags (abfd, ".rela.IA_64.pltoff",
1577 (SEC_ALLOC | SEC_LOAD
1578 | SEC_HAS_CONTENTS
1579 | SEC_IN_MEMORY
1580 | SEC_LINKER_CREATED
1581 | SEC_READONLY));
1582 if (s == NULL
1583 || !bfd_set_section_alignment (abfd, s, LOG_SECTION_ALIGN))
1584 return FALSE;
1585 ia64_info->rel_pltoff_sec = s;
1586
1587 return TRUE;
1588 }
1589
1590 /* Find and/or create a hash entry for local symbol. */
1591 static struct elfNN_ia64_local_hash_entry *
1592 get_local_sym_hash (struct elfNN_ia64_link_hash_table *ia64_info,
1593 bfd *abfd, const Elf_Internal_Rela *rel,
1594 bfd_boolean create)
1595 {
1596 struct elfNN_ia64_local_hash_entry e, *ret;
1597 asection *sec = abfd->sections;
1598 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
1599 ELFNN_R_SYM (rel->r_info));
1600 void **slot;
1601
1602 e.id = sec->id;
1603 e.r_sym = ELFNN_R_SYM (rel->r_info);
1604 slot = htab_find_slot_with_hash (ia64_info->loc_hash_table, &e, h,
1605 create ? INSERT : NO_INSERT);
1606
1607 if (!slot)
1608 return NULL;
1609
1610 if (*slot)
1611 return (struct elfNN_ia64_local_hash_entry *) *slot;
1612
1613 ret = (struct elfNN_ia64_local_hash_entry *)
1614 objalloc_alloc ((struct objalloc *) ia64_info->loc_hash_memory,
1615 sizeof (struct elfNN_ia64_local_hash_entry));
1616 if (ret)
1617 {
1618 memset (ret, 0, sizeof (*ret));
1619 ret->id = sec->id;
1620 ret->r_sym = ELFNN_R_SYM (rel->r_info);
1621 *slot = ret;
1622 }
1623 return ret;
1624 }
1625
1626 /* Used to sort elfNN_ia64_dyn_sym_info array. */
1627
1628 static int
1629 addend_compare (const void *xp, const void *yp)
1630 {
1631 const struct elfNN_ia64_dyn_sym_info *x
1632 = (const struct elfNN_ia64_dyn_sym_info *) xp;
1633 const struct elfNN_ia64_dyn_sym_info *y
1634 = (const struct elfNN_ia64_dyn_sym_info *) yp;
1635
1636 return x->addend < y->addend ? -1 : x->addend > y->addend ? 1 : 0;
1637 }
1638
1639 /* Sort elfNN_ia64_dyn_sym_info array and remove duplicates. */
1640
1641 static unsigned int
1642 sort_dyn_sym_info (struct elfNN_ia64_dyn_sym_info *info,
1643 unsigned int count)
1644 {
1645 bfd_vma curr, prev, got_offset;
1646 unsigned int i, kept, dupes, diff, dest, src, len;
1647
1648 qsort (info, count, sizeof (*info), addend_compare);
1649
1650 /* Find the first duplicate. */
1651 prev = info [0].addend;
1652 got_offset = info [0].got_offset;
1653 for (i = 1; i < count; i++)
1654 {
1655 curr = info [i].addend;
1656 if (curr == prev)
1657 {
1658 /* For duplicates, make sure that GOT_OFFSET is valid. */
1659 if (got_offset == (bfd_vma) -1)
1660 got_offset = info [i].got_offset;
1661 break;
1662 }
1663 got_offset = info [i].got_offset;
1664 prev = curr;
1665 }
1666
1667 /* We may move a block of elements to here. */
1668 dest = i++;
1669
1670 /* Remove duplicates. */
1671 if (i < count)
1672 {
1673 while (i < count)
1674 {
1675 /* For duplicates, make sure that the kept one has a valid
1676 got_offset. */
1677 kept = dest - 1;
1678 if (got_offset != (bfd_vma) -1)
1679 info [kept].got_offset = got_offset;
1680
1681 curr = info [i].addend;
1682 got_offset = info [i].got_offset;
1683
1684 /* Move a block of elements whose first one is different from
1685 the previous. */
1686 if (curr == prev)
1687 {
1688 for (src = i + 1; src < count; src++)
1689 {
1690 if (info [src].addend != curr)
1691 break;
1692 /* For duplicates, make sure that GOT_OFFSET is
1693 valid. */
1694 if (got_offset == (bfd_vma) -1)
1695 got_offset = info [src].got_offset;
1696 }
1697
1698 /* Make sure that the kept one has a valid got_offset. */
1699 if (got_offset != (bfd_vma) -1)
1700 info [kept].got_offset = got_offset;
1701 }
1702 else
1703 src = i;
1704
1705 if (src >= count)
1706 break;
1707
1708 /* Find the next duplicate. SRC will be kept. */
1709 prev = info [src].addend;
1710 got_offset = info [src].got_offset;
1711 for (dupes = src + 1; dupes < count; dupes ++)
1712 {
1713 curr = info [dupes].addend;
1714 if (curr == prev)
1715 {
1716 /* Make sure that got_offset is valid. */
1717 if (got_offset == (bfd_vma) -1)
1718 got_offset = info [dupes].got_offset;
1719
1720 /* For duplicates, make sure that the kept one has
1721 a valid got_offset. */
1722 if (got_offset != (bfd_vma) -1)
1723 info [dupes - 1].got_offset = got_offset;
1724 break;
1725 }
1726 got_offset = info [dupes].got_offset;
1727 prev = curr;
1728 }
1729
1730 /* How much to move. */
1731 len = dupes - src;
1732 i = dupes + 1;
1733
1734 if (len == 1 && dupes < count)
1735 {
1736 /* If we only move 1 element, we combine it with the next
1737 one. There must be at least a duplicate. Find the
1738 next different one. */
1739 for (diff = dupes + 1, src++; diff < count; diff++, src++)
1740 {
1741 if (info [diff].addend != curr)
1742 break;
1743 /* Make sure that got_offset is valid. */
1744 if (got_offset == (bfd_vma) -1)
1745 got_offset = info [diff].got_offset;
1746 }
1747
1748 /* Makre sure that the last duplicated one has an valid
1749 offset. */
1750 BFD_ASSERT (curr == prev);
1751 if (got_offset != (bfd_vma) -1)
1752 info [diff - 1].got_offset = got_offset;
1753
1754 if (diff < count)
1755 {
1756 /* Find the next duplicate. Track the current valid
1757 offset. */
1758 prev = info [diff].addend;
1759 got_offset = info [diff].got_offset;
1760 for (dupes = diff + 1; dupes < count; dupes ++)
1761 {
1762 curr = info [dupes].addend;
1763 if (curr == prev)
1764 {
1765 /* For duplicates, make sure that GOT_OFFSET
1766 is valid. */
1767 if (got_offset == (bfd_vma) -1)
1768 got_offset = info [dupes].got_offset;
1769 break;
1770 }
1771 got_offset = info [dupes].got_offset;
1772 prev = curr;
1773 diff++;
1774 }
1775
1776 len = diff - src + 1;
1777 i = diff + 1;
1778 }
1779 }
1780
1781 memmove (&info [dest], &info [src], len * sizeof (*info));
1782
1783 dest += len;
1784 }
1785
1786 count = dest;
1787 }
1788 else
1789 {
1790 /* When we get here, either there is no duplicate at all or
1791 the only duplicate is the last element. */
1792 if (dest < count)
1793 {
1794 /* If the last element is a duplicate, make sure that the
1795 kept one has a valid got_offset. We also update count. */
1796 if (got_offset != (bfd_vma) -1)
1797 info [dest - 1].got_offset = got_offset;
1798 count = dest;
1799 }
1800 }
1801
1802 return count;
1803 }
1804
1805 /* Find and/or create a descriptor for dynamic symbol info. This will
1806 vary based on global or local symbol, and the addend to the reloc.
1807
1808 We don't sort when inserting. Also, we sort and eliminate
1809 duplicates if there is an unsorted section. Typically, this will
1810 only happen once, because we do all insertions before lookups. We
1811 then use bsearch to do a lookup. This also allows lookups to be
1812 fast. So we have fast insertion (O(log N) due to duplicate check),
1813 fast lookup (O(log N)) and one sort (O(N log N) expected time).
1814 Previously, all lookups were O(N) because of the use of the linked
1815 list and also all insertions were O(N) because of the check for
1816 duplicates. There are some complications here because the array
1817 size grows occasionally, which may add an O(N) factor, but this
1818 should be rare. Also, we free the excess array allocation, which
1819 requires a copy which is O(N), but this only happens once. */
1820
1821 static struct elfNN_ia64_dyn_sym_info *
1822 get_dyn_sym_info (struct elfNN_ia64_link_hash_table *ia64_info,
1823 struct elf_link_hash_entry *h, bfd *abfd,
1824 const Elf_Internal_Rela *rel, bfd_boolean create)
1825 {
1826 struct elfNN_ia64_dyn_sym_info **info_p, *info, *dyn_i, key;
1827 unsigned int *count_p, *sorted_count_p, *size_p;
1828 unsigned int count, sorted_count, size;
1829 bfd_vma addend = rel ? rel->r_addend : 0;
1830 bfd_size_type amt;
1831
1832 if (h)
1833 {
1834 struct elfNN_ia64_link_hash_entry *global_h;
1835
1836 global_h = (struct elfNN_ia64_link_hash_entry *) h;
1837 info_p = &global_h->info;
1838 count_p = &global_h->count;
1839 sorted_count_p = &global_h->sorted_count;
1840 size_p = &global_h->size;
1841 }
1842 else
1843 {
1844 struct elfNN_ia64_local_hash_entry *loc_h;
1845
1846 loc_h = get_local_sym_hash (ia64_info, abfd, rel, create);
1847 if (!loc_h)
1848 {
1849 BFD_ASSERT (!create);
1850 return NULL;
1851 }
1852
1853 info_p = &loc_h->info;
1854 count_p = &loc_h->count;
1855 sorted_count_p = &loc_h->sorted_count;
1856 size_p = &loc_h->size;
1857 }
1858
1859 count = *count_p;
1860 sorted_count = *sorted_count_p;
1861 size = *size_p;
1862 info = *info_p;
1863 if (create)
1864 {
1865 /* When we create the array, we don't check for duplicates,
1866 except in the previously sorted section if one exists, and
1867 against the last inserted entry. This allows insertions to
1868 be fast. */
1869 if (info)
1870 {
1871 if (sorted_count)
1872 {
1873 /* Try bsearch first on the sorted section. */
1874 key.addend = addend;
1875 dyn_i = bsearch (&key, info, sorted_count,
1876 sizeof (*info), addend_compare);
1877
1878 if (dyn_i)
1879 {
1880 return dyn_i;
1881 }
1882 }
1883
1884 /* Do a quick check for the last inserted entry. */
1885 dyn_i = info + count - 1;
1886 if (dyn_i->addend == addend)
1887 {
1888 return dyn_i;
1889 }
1890 }
1891
1892 if (size == 0)
1893 {
1894 /* It is the very first element. We create the array of size
1895 1. */
1896 size = 1;
1897 amt = size * sizeof (*info);
1898 info = bfd_malloc (amt);
1899 }
1900 else if (size <= count)
1901 {
1902 /* We double the array size every time when we reach the
1903 size limit. */
1904 size += size;
1905 amt = size * sizeof (*info);
1906 info = bfd_realloc (info, amt);
1907 }
1908 else
1909 goto has_space;
1910
1911 if (info == NULL)
1912 return NULL;
1913 *size_p = size;
1914 *info_p = info;
1915
1916 has_space:
1917 /* Append the new one to the array. */
1918 dyn_i = info + count;
1919 memset (dyn_i, 0, sizeof (*dyn_i));
1920 dyn_i->got_offset = (bfd_vma) -1;
1921 dyn_i->addend = addend;
1922
1923 /* We increment count only since the new ones are unsorted and
1924 may have duplicate. */
1925 (*count_p)++;
1926 }
1927 else
1928 {
1929 /* It is a lookup without insertion. Sort array if part of the
1930 array isn't sorted. */
1931 if (count != sorted_count)
1932 {
1933 count = sort_dyn_sym_info (info, count);
1934 *count_p = count;
1935 *sorted_count_p = count;
1936 }
1937
1938 /* Free unused memory. */
1939 if (size != count)
1940 {
1941 amt = count * sizeof (*info);
1942 info = bfd_malloc (amt);
1943 if (info != NULL)
1944 {
1945 memcpy (info, *info_p, amt);
1946 free (*info_p);
1947 *size_p = count;
1948 *info_p = info;
1949 }
1950 }
1951
1952 key.addend = addend;
1953 dyn_i = bsearch (&key, info, count,
1954 sizeof (*info), addend_compare);
1955 }
1956
1957 return dyn_i;
1958 }
1959
1960 static asection *
1961 get_got (bfd *abfd, struct bfd_link_info *info,
1962 struct elfNN_ia64_link_hash_table *ia64_info)
1963 {
1964 asection *got;
1965 bfd *dynobj;
1966
1967 got = ia64_info->root.sgot;
1968 if (!got)
1969 {
1970 flagword flags;
1971
1972 dynobj = ia64_info->root.dynobj;
1973 if (!dynobj)
1974 ia64_info->root.dynobj = dynobj = abfd;
1975 if (!_bfd_elf_create_got_section (dynobj, info))
1976 return NULL;
1977
1978 got = ia64_info->root.sgot;
1979
1980 /* The .got section is always aligned at 8 bytes. */
1981 if (!bfd_set_section_alignment (abfd, got, 3))
1982 return NULL;
1983
1984 flags = bfd_get_section_flags (abfd, got);
1985 if (! bfd_set_section_flags (abfd, got, SEC_SMALL_DATA | flags))
1986 return NULL;
1987 }
1988
1989 return got;
1990 }
1991
1992 /* Create function descriptor section (.opd). This section is called .opd
1993 because it contains "official procedure descriptors". The "official"
1994 refers to the fact that these descriptors are used when taking the address
1995 of a procedure, thus ensuring a unique address for each procedure. */
1996
1997 static asection *
1998 get_fptr (bfd *abfd, struct bfd_link_info *info,
1999 struct elfNN_ia64_link_hash_table *ia64_info)
2000 {
2001 asection *fptr;
2002 bfd *dynobj;
2003
2004 fptr = ia64_info->fptr_sec;
2005 if (!fptr)
2006 {
2007 dynobj = ia64_info->root.dynobj;
2008 if (!dynobj)
2009 ia64_info->root.dynobj = dynobj = abfd;
2010
2011 fptr = bfd_make_section_anyway_with_flags (dynobj, ".opd",
2012 (SEC_ALLOC
2013 | SEC_LOAD
2014 | SEC_HAS_CONTENTS
2015 | SEC_IN_MEMORY
2016 | (bfd_link_pie (info)
2017 ? 0 : SEC_READONLY)
2018 | SEC_LINKER_CREATED));
2019 if (!fptr
2020 || !bfd_set_section_alignment (abfd, fptr, 4))
2021 {
2022 BFD_ASSERT (0);
2023 return NULL;
2024 }
2025
2026 ia64_info->fptr_sec = fptr;
2027
2028 if (bfd_link_pie (info))
2029 {
2030 asection *fptr_rel;
2031 fptr_rel = bfd_make_section_anyway_with_flags (dynobj, ".rela.opd",
2032 (SEC_ALLOC | SEC_LOAD
2033 | SEC_HAS_CONTENTS
2034 | SEC_IN_MEMORY
2035 | SEC_LINKER_CREATED
2036 | SEC_READONLY));
2037 if (fptr_rel == NULL
2038 || !bfd_set_section_alignment (abfd, fptr_rel,
2039 LOG_SECTION_ALIGN))
2040 {
2041 BFD_ASSERT (0);
2042 return NULL;
2043 }
2044
2045 ia64_info->rel_fptr_sec = fptr_rel;
2046 }
2047 }
2048
2049 return fptr;
2050 }
2051
2052 static asection *
2053 get_pltoff (bfd *abfd, struct bfd_link_info *info ATTRIBUTE_UNUSED,
2054 struct elfNN_ia64_link_hash_table *ia64_info)
2055 {
2056 asection *pltoff;
2057 bfd *dynobj;
2058
2059 pltoff = ia64_info->pltoff_sec;
2060 if (!pltoff)
2061 {
2062 dynobj = ia64_info->root.dynobj;
2063 if (!dynobj)
2064 ia64_info->root.dynobj = dynobj = abfd;
2065
2066 pltoff = bfd_make_section_anyway_with_flags (dynobj,
2067 ELF_STRING_ia64_pltoff,
2068 (SEC_ALLOC
2069 | SEC_LOAD
2070 | SEC_HAS_CONTENTS
2071 | SEC_IN_MEMORY
2072 | SEC_SMALL_DATA
2073 | SEC_LINKER_CREATED));
2074 if (!pltoff
2075 || !bfd_set_section_alignment (abfd, pltoff, 4))
2076 {
2077 BFD_ASSERT (0);
2078 return NULL;
2079 }
2080
2081 ia64_info->pltoff_sec = pltoff;
2082 }
2083
2084 return pltoff;
2085 }
2086
2087 static asection *
2088 get_reloc_section (bfd *abfd,
2089 struct elfNN_ia64_link_hash_table *ia64_info,
2090 asection *sec, bfd_boolean create)
2091 {
2092 const char *srel_name;
2093 asection *srel;
2094 bfd *dynobj;
2095
2096 srel_name = (bfd_elf_string_from_elf_section
2097 (abfd, elf_elfheader(abfd)->e_shstrndx,
2098 _bfd_elf_single_rel_hdr (sec)->sh_name));
2099 if (srel_name == NULL)
2100 return NULL;
2101
2102 dynobj = ia64_info->root.dynobj;
2103 if (!dynobj)
2104 ia64_info->root.dynobj = dynobj = abfd;
2105
2106 srel = bfd_get_linker_section (dynobj, srel_name);
2107 if (srel == NULL && create)
2108 {
2109 srel = bfd_make_section_anyway_with_flags (dynobj, srel_name,
2110 (SEC_ALLOC | SEC_LOAD
2111 | SEC_HAS_CONTENTS
2112 | SEC_IN_MEMORY
2113 | SEC_LINKER_CREATED
2114 | SEC_READONLY));
2115 if (srel == NULL
2116 || !bfd_set_section_alignment (dynobj, srel,
2117 LOG_SECTION_ALIGN))
2118 return NULL;
2119 }
2120
2121 return srel;
2122 }
2123
2124 static bfd_boolean
2125 count_dyn_reloc (bfd *abfd, struct elfNN_ia64_dyn_sym_info *dyn_i,
2126 asection *srel, int type, bfd_boolean reltext)
2127 {
2128 struct elfNN_ia64_dyn_reloc_entry *rent;
2129
2130 for (rent = dyn_i->reloc_entries; rent; rent = rent->next)
2131 if (rent->srel == srel && rent->type == type)
2132 break;
2133
2134 if (!rent)
2135 {
2136 rent = ((struct elfNN_ia64_dyn_reloc_entry *)
2137 bfd_alloc (abfd, (bfd_size_type) sizeof (*rent)));
2138 if (!rent)
2139 return FALSE;
2140
2141 rent->next = dyn_i->reloc_entries;
2142 rent->srel = srel;
2143 rent->type = type;
2144 rent->count = 0;
2145 dyn_i->reloc_entries = rent;
2146 }
2147 rent->reltext = reltext;
2148 rent->count++;
2149
2150 return TRUE;
2151 }
2152
2153 static bfd_boolean
2154 elfNN_ia64_check_relocs (bfd *abfd, struct bfd_link_info *info,
2155 asection *sec,
2156 const Elf_Internal_Rela *relocs)
2157 {
2158 struct elfNN_ia64_link_hash_table *ia64_info;
2159 const Elf_Internal_Rela *relend;
2160 Elf_Internal_Shdr *symtab_hdr;
2161 const Elf_Internal_Rela *rel;
2162 asection *got, *fptr, *srel, *pltoff;
2163 enum {
2164 NEED_GOT = 1,
2165 NEED_GOTX = 2,
2166 NEED_FPTR = 4,
2167 NEED_PLTOFF = 8,
2168 NEED_MIN_PLT = 16,
2169 NEED_FULL_PLT = 32,
2170 NEED_DYNREL = 64,
2171 NEED_LTOFF_FPTR = 128,
2172 NEED_TPREL = 256,
2173 NEED_DTPMOD = 512,
2174 NEED_DTPREL = 1024
2175 };
2176 int need_entry;
2177 struct elf_link_hash_entry *h;
2178 unsigned long r_symndx;
2179 bfd_boolean maybe_dynamic;
2180
2181 if (bfd_link_relocatable (info))
2182 return TRUE;
2183
2184 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2185 ia64_info = elfNN_ia64_hash_table (info);
2186 if (ia64_info == NULL)
2187 return FALSE;
2188
2189 got = fptr = srel = pltoff = NULL;
2190
2191 relend = relocs + sec->reloc_count;
2192
2193 /* We scan relocations first to create dynamic relocation arrays. We
2194 modified get_dyn_sym_info to allow fast insertion and support fast
2195 lookup in the next loop. */
2196 for (rel = relocs; rel < relend; ++rel)
2197 {
2198 r_symndx = ELFNN_R_SYM (rel->r_info);
2199 if (r_symndx >= symtab_hdr->sh_info)
2200 {
2201 long indx = r_symndx - symtab_hdr->sh_info;
2202 h = elf_sym_hashes (abfd)[indx];
2203 while (h->root.type == bfd_link_hash_indirect
2204 || h->root.type == bfd_link_hash_warning)
2205 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2206 }
2207 else
2208 h = NULL;
2209
2210 if (h && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
2211 continue;
2212
2213 /* We can only get preliminary data on whether a symbol is
2214 locally or externally defined, as not all of the input files
2215 have yet been processed. Do something with what we know, as
2216 this may help reduce memory usage and processing time later. */
2217 maybe_dynamic = (h && ((!bfd_link_executable (info)
2218 && (!SYMBOLIC_BIND (info, h)
2219 || info->unresolved_syms_in_shared_libs == RM_IGNORE))
2220 || !h->def_regular
2221 || h->root.type == bfd_link_hash_defweak));
2222
2223 need_entry = 0;
2224 switch (ELFNN_R_TYPE (rel->r_info))
2225 {
2226 case R_IA64_TPREL64MSB:
2227 case R_IA64_TPREL64LSB:
2228 if (bfd_link_pic (info) || maybe_dynamic)
2229 need_entry = NEED_DYNREL;
2230 break;
2231
2232 case R_IA64_LTOFF_TPREL22:
2233 need_entry = NEED_TPREL;
2234 if (bfd_link_pic (info))
2235 info->flags |= DF_STATIC_TLS;
2236 break;
2237
2238 case R_IA64_DTPREL32MSB:
2239 case R_IA64_DTPREL32LSB:
2240 case R_IA64_DTPREL64MSB:
2241 case R_IA64_DTPREL64LSB:
2242 if (bfd_link_pic (info) || maybe_dynamic)
2243 need_entry = NEED_DYNREL;
2244 break;
2245
2246 case R_IA64_LTOFF_DTPREL22:
2247 need_entry = NEED_DTPREL;
2248 break;
2249
2250 case R_IA64_DTPMOD64MSB:
2251 case R_IA64_DTPMOD64LSB:
2252 if (bfd_link_pic (info) || maybe_dynamic)
2253 need_entry = NEED_DYNREL;
2254 break;
2255
2256 case R_IA64_LTOFF_DTPMOD22:
2257 need_entry = NEED_DTPMOD;
2258 break;
2259
2260 case R_IA64_LTOFF_FPTR22:
2261 case R_IA64_LTOFF_FPTR64I:
2262 case R_IA64_LTOFF_FPTR32MSB:
2263 case R_IA64_LTOFF_FPTR32LSB:
2264 case R_IA64_LTOFF_FPTR64MSB:
2265 case R_IA64_LTOFF_FPTR64LSB:
2266 need_entry = NEED_FPTR | NEED_GOT | NEED_LTOFF_FPTR;
2267 break;
2268
2269 case R_IA64_FPTR64I:
2270 case R_IA64_FPTR32MSB:
2271 case R_IA64_FPTR32LSB:
2272 case R_IA64_FPTR64MSB:
2273 case R_IA64_FPTR64LSB:
2274 if (bfd_link_pic (info) || h)
2275 need_entry = NEED_FPTR | NEED_DYNREL;
2276 else
2277 need_entry = NEED_FPTR;
2278 break;
2279
2280 case R_IA64_LTOFF22:
2281 case R_IA64_LTOFF64I:
2282 need_entry = NEED_GOT;
2283 break;
2284
2285 case R_IA64_LTOFF22X:
2286 need_entry = NEED_GOTX;
2287 break;
2288
2289 case R_IA64_PLTOFF22:
2290 case R_IA64_PLTOFF64I:
2291 case R_IA64_PLTOFF64MSB:
2292 case R_IA64_PLTOFF64LSB:
2293 need_entry = NEED_PLTOFF;
2294 if (h)
2295 {
2296 if (maybe_dynamic)
2297 need_entry |= NEED_MIN_PLT;
2298 }
2299 else
2300 {
2301 (*info->callbacks->warning)
2302 (info, _("@pltoff reloc against local symbol"), 0,
2303 abfd, 0, (bfd_vma) 0);
2304 }
2305 break;
2306
2307 case R_IA64_PCREL21B:
2308 case R_IA64_PCREL60B:
2309 /* Depending on where this symbol is defined, we may or may not
2310 need a full plt entry. Only skip if we know we'll not need
2311 the entry -- static or symbolic, and the symbol definition
2312 has already been seen. */
2313 if (maybe_dynamic && rel->r_addend == 0)
2314 need_entry = NEED_FULL_PLT;
2315 break;
2316
2317 case R_IA64_IMM14:
2318 case R_IA64_IMM22:
2319 case R_IA64_IMM64:
2320 case R_IA64_DIR32MSB:
2321 case R_IA64_DIR32LSB:
2322 case R_IA64_DIR64MSB:
2323 case R_IA64_DIR64LSB:
2324 /* Shared objects will always need at least a REL relocation. */
2325 if (bfd_link_pic (info) || maybe_dynamic)
2326 need_entry = NEED_DYNREL;
2327 break;
2328
2329 case R_IA64_IPLTMSB:
2330 case R_IA64_IPLTLSB:
2331 /* Shared objects will always need at least a REL relocation. */
2332 if (bfd_link_pic (info) || maybe_dynamic)
2333 need_entry = NEED_DYNREL;
2334 break;
2335
2336 case R_IA64_PCREL22:
2337 case R_IA64_PCREL64I:
2338 case R_IA64_PCREL32MSB:
2339 case R_IA64_PCREL32LSB:
2340 case R_IA64_PCREL64MSB:
2341 case R_IA64_PCREL64LSB:
2342 if (maybe_dynamic)
2343 need_entry = NEED_DYNREL;
2344 break;
2345 }
2346
2347 if (!need_entry)
2348 continue;
2349
2350 if ((need_entry & NEED_FPTR) != 0
2351 && rel->r_addend)
2352 {
2353 (*info->callbacks->warning)
2354 (info, _("non-zero addend in @fptr reloc"), 0,
2355 abfd, 0, (bfd_vma) 0);
2356 }
2357
2358 if (get_dyn_sym_info (ia64_info, h, abfd, rel, TRUE) == NULL)
2359 return FALSE;
2360 }
2361
2362 /* Now, we only do lookup without insertion, which is very fast
2363 with the modified get_dyn_sym_info. */
2364 for (rel = relocs; rel < relend; ++rel)
2365 {
2366 struct elfNN_ia64_dyn_sym_info *dyn_i;
2367 int dynrel_type = R_IA64_NONE;
2368
2369 r_symndx = ELFNN_R_SYM (rel->r_info);
2370 if (r_symndx >= symtab_hdr->sh_info)
2371 {
2372 /* We're dealing with a global symbol -- find its hash entry
2373 and mark it as being referenced. */
2374 long indx = r_symndx - symtab_hdr->sh_info;
2375 h = elf_sym_hashes (abfd)[indx];
2376 while (h->root.type == bfd_link_hash_indirect
2377 || h->root.type == bfd_link_hash_warning)
2378 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2379
2380 /* PR15323, ref flags aren't set for references in the same
2381 object. */
2382 h->ref_regular = 1;
2383 }
2384 else
2385 h = NULL;
2386
2387 if (h && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
2388 continue;
2389
2390 /* We can only get preliminary data on whether a symbol is
2391 locally or externally defined, as not all of the input files
2392 have yet been processed. Do something with what we know, as
2393 this may help reduce memory usage and processing time later. */
2394 maybe_dynamic = (h && ((!bfd_link_executable (info)
2395 && (!SYMBOLIC_BIND (info, h)
2396 || info->unresolved_syms_in_shared_libs == RM_IGNORE))
2397 || !h->def_regular
2398 || h->root.type == bfd_link_hash_defweak));
2399
2400 need_entry = 0;
2401 switch (ELFNN_R_TYPE (rel->r_info))
2402 {
2403 case R_IA64_TPREL64MSB:
2404 case R_IA64_TPREL64LSB:
2405 if (bfd_link_pic (info) || maybe_dynamic)
2406 need_entry = NEED_DYNREL;
2407 dynrel_type = R_IA64_TPREL64LSB;
2408 if (bfd_link_pic (info))
2409 info->flags |= DF_STATIC_TLS;
2410 break;
2411
2412 case R_IA64_LTOFF_TPREL22:
2413 need_entry = NEED_TPREL;
2414 if (bfd_link_pic (info))
2415 info->flags |= DF_STATIC_TLS;
2416 break;
2417
2418 case R_IA64_DTPREL32MSB:
2419 case R_IA64_DTPREL32LSB:
2420 case R_IA64_DTPREL64MSB:
2421 case R_IA64_DTPREL64LSB:
2422 if (bfd_link_pic (info) || maybe_dynamic)
2423 need_entry = NEED_DYNREL;
2424 dynrel_type = R_IA64_DTPRELNNLSB;
2425 break;
2426
2427 case R_IA64_LTOFF_DTPREL22:
2428 need_entry = NEED_DTPREL;
2429 break;
2430
2431 case R_IA64_DTPMOD64MSB:
2432 case R_IA64_DTPMOD64LSB:
2433 if (bfd_link_pic (info) || maybe_dynamic)
2434 need_entry = NEED_DYNREL;
2435 dynrel_type = R_IA64_DTPMOD64LSB;
2436 break;
2437
2438 case R_IA64_LTOFF_DTPMOD22:
2439 need_entry = NEED_DTPMOD;
2440 break;
2441
2442 case R_IA64_LTOFF_FPTR22:
2443 case R_IA64_LTOFF_FPTR64I:
2444 case R_IA64_LTOFF_FPTR32MSB:
2445 case R_IA64_LTOFF_FPTR32LSB:
2446 case R_IA64_LTOFF_FPTR64MSB:
2447 case R_IA64_LTOFF_FPTR64LSB:
2448 need_entry = NEED_FPTR | NEED_GOT | NEED_LTOFF_FPTR;
2449 break;
2450
2451 case R_IA64_FPTR64I:
2452 case R_IA64_FPTR32MSB:
2453 case R_IA64_FPTR32LSB:
2454 case R_IA64_FPTR64MSB:
2455 case R_IA64_FPTR64LSB:
2456 if (bfd_link_pic (info) || h)
2457 need_entry = NEED_FPTR | NEED_DYNREL;
2458 else
2459 need_entry = NEED_FPTR;
2460 dynrel_type = R_IA64_FPTRNNLSB;
2461 break;
2462
2463 case R_IA64_LTOFF22:
2464 case R_IA64_LTOFF64I:
2465 need_entry = NEED_GOT;
2466 break;
2467
2468 case R_IA64_LTOFF22X:
2469 need_entry = NEED_GOTX;
2470 break;
2471
2472 case R_IA64_PLTOFF22:
2473 case R_IA64_PLTOFF64I:
2474 case R_IA64_PLTOFF64MSB:
2475 case R_IA64_PLTOFF64LSB:
2476 need_entry = NEED_PLTOFF;
2477 if (h)
2478 {
2479 if (maybe_dynamic)
2480 need_entry |= NEED_MIN_PLT;
2481 }
2482 break;
2483
2484 case R_IA64_PCREL21B:
2485 case R_IA64_PCREL60B:
2486 /* Depending on where this symbol is defined, we may or may not
2487 need a full plt entry. Only skip if we know we'll not need
2488 the entry -- static or symbolic, and the symbol definition
2489 has already been seen. */
2490 if (maybe_dynamic && rel->r_addend == 0)
2491 need_entry = NEED_FULL_PLT;
2492 break;
2493
2494 case R_IA64_IMM14:
2495 case R_IA64_IMM22:
2496 case R_IA64_IMM64:
2497 case R_IA64_DIR32MSB:
2498 case R_IA64_DIR32LSB:
2499 case R_IA64_DIR64MSB:
2500 case R_IA64_DIR64LSB:
2501 /* Shared objects will always need at least a REL relocation. */
2502 if (bfd_link_pic (info) || maybe_dynamic)
2503 need_entry = NEED_DYNREL;
2504 dynrel_type = R_IA64_DIRNNLSB;
2505 break;
2506
2507 case R_IA64_IPLTMSB:
2508 case R_IA64_IPLTLSB:
2509 /* Shared objects will always need at least a REL relocation. */
2510 if (bfd_link_pic (info) || maybe_dynamic)
2511 need_entry = NEED_DYNREL;
2512 dynrel_type = R_IA64_IPLTLSB;
2513 break;
2514
2515 case R_IA64_PCREL22:
2516 case R_IA64_PCREL64I:
2517 case R_IA64_PCREL32MSB:
2518 case R_IA64_PCREL32LSB:
2519 case R_IA64_PCREL64MSB:
2520 case R_IA64_PCREL64LSB:
2521 if (maybe_dynamic)
2522 need_entry = NEED_DYNREL;
2523 dynrel_type = R_IA64_PCRELNNLSB;
2524 break;
2525 }
2526
2527 if (!need_entry)
2528 continue;
2529
2530 dyn_i = get_dyn_sym_info (ia64_info, h, abfd, rel, FALSE);
2531
2532 /* Record whether or not this is a local symbol. */
2533 dyn_i->h = h;
2534
2535 /* Create what's needed. */
2536 if (need_entry & (NEED_GOT | NEED_GOTX | NEED_TPREL
2537 | NEED_DTPMOD | NEED_DTPREL))
2538 {
2539 if (!got)
2540 {
2541 got = get_got (abfd, info, ia64_info);
2542 if (!got)
2543 return FALSE;
2544 }
2545 if (need_entry & NEED_GOT)
2546 dyn_i->want_got = 1;
2547 if (need_entry & NEED_GOTX)
2548 dyn_i->want_gotx = 1;
2549 if (need_entry & NEED_TPREL)
2550 dyn_i->want_tprel = 1;
2551 if (need_entry & NEED_DTPMOD)
2552 dyn_i->want_dtpmod = 1;
2553 if (need_entry & NEED_DTPREL)
2554 dyn_i->want_dtprel = 1;
2555 }
2556 if (need_entry & NEED_FPTR)
2557 {
2558 if (!fptr)
2559 {
2560 fptr = get_fptr (abfd, info, ia64_info);
2561 if (!fptr)
2562 return FALSE;
2563 }
2564
2565 /* FPTRs for shared libraries are allocated by the dynamic
2566 linker. Make sure this local symbol will appear in the
2567 dynamic symbol table. */
2568 if (!h && bfd_link_pic (info))
2569 {
2570 if (! (bfd_elf_link_record_local_dynamic_symbol
2571 (info, abfd, (long) r_symndx)))
2572 return FALSE;
2573 }
2574
2575 dyn_i->want_fptr = 1;
2576 }
2577 if (need_entry & NEED_LTOFF_FPTR)
2578 dyn_i->want_ltoff_fptr = 1;
2579 if (need_entry & (NEED_MIN_PLT | NEED_FULL_PLT))
2580 {
2581 if (!ia64_info->root.dynobj)
2582 ia64_info->root.dynobj = abfd;
2583 h->needs_plt = 1;
2584 dyn_i->want_plt = 1;
2585 }
2586 if (need_entry & NEED_FULL_PLT)
2587 dyn_i->want_plt2 = 1;
2588 if (need_entry & NEED_PLTOFF)
2589 {
2590 /* This is needed here, in case @pltoff is used in a non-shared
2591 link. */
2592 if (!pltoff)
2593 {
2594 pltoff = get_pltoff (abfd, info, ia64_info);
2595 if (!pltoff)
2596 return FALSE;
2597 }
2598
2599 dyn_i->want_pltoff = 1;
2600 }
2601 if ((need_entry & NEED_DYNREL) && (sec->flags & SEC_ALLOC))
2602 {
2603 if (!srel)
2604 {
2605 srel = get_reloc_section (abfd, ia64_info, sec, TRUE);
2606 if (!srel)
2607 return FALSE;
2608 }
2609 if (!count_dyn_reloc (abfd, dyn_i, srel, dynrel_type,
2610 (sec->flags & SEC_READONLY) != 0))
2611 return FALSE;
2612 }
2613 }
2614
2615 return TRUE;
2616 }
2617
2618 /* For cleanliness, and potentially faster dynamic loading, allocate
2619 external GOT entries first. */
2620
2621 static bfd_boolean
2622 allocate_global_data_got (struct elfNN_ia64_dyn_sym_info *dyn_i,
2623 void * data)
2624 {
2625 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2626
2627 if ((dyn_i->want_got || dyn_i->want_gotx)
2628 && ! dyn_i->want_fptr
2629 && elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0))
2630 {
2631 dyn_i->got_offset = x->ofs;
2632 x->ofs += 8;
2633 }
2634 if (dyn_i->want_tprel)
2635 {
2636 dyn_i->tprel_offset = x->ofs;
2637 x->ofs += 8;
2638 }
2639 if (dyn_i->want_dtpmod)
2640 {
2641 if (elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0))
2642 {
2643 dyn_i->dtpmod_offset = x->ofs;
2644 x->ofs += 8;
2645 }
2646 else
2647 {
2648 struct elfNN_ia64_link_hash_table *ia64_info;
2649
2650 ia64_info = elfNN_ia64_hash_table (x->info);
2651 if (ia64_info == NULL)
2652 return FALSE;
2653
2654 if (ia64_info->self_dtpmod_offset == (bfd_vma) -1)
2655 {
2656 ia64_info->self_dtpmod_offset = x->ofs;
2657 x->ofs += 8;
2658 }
2659 dyn_i->dtpmod_offset = ia64_info->self_dtpmod_offset;
2660 }
2661 }
2662 if (dyn_i->want_dtprel)
2663 {
2664 dyn_i->dtprel_offset = x->ofs;
2665 x->ofs += 8;
2666 }
2667 return TRUE;
2668 }
2669
2670 /* Next, allocate all the GOT entries used by LTOFF_FPTR relocs. */
2671
2672 static bfd_boolean
2673 allocate_global_fptr_got (struct elfNN_ia64_dyn_sym_info *dyn_i,
2674 void * data)
2675 {
2676 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2677
2678 if (dyn_i->want_got
2679 && dyn_i->want_fptr
2680 && elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, R_IA64_FPTRNNLSB))
2681 {
2682 dyn_i->got_offset = x->ofs;
2683 x->ofs += 8;
2684 }
2685 return TRUE;
2686 }
2687
2688 /* Lastly, allocate all the GOT entries for local data. */
2689
2690 static bfd_boolean
2691 allocate_local_got (struct elfNN_ia64_dyn_sym_info *dyn_i,
2692 void * data)
2693 {
2694 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2695
2696 if ((dyn_i->want_got || dyn_i->want_gotx)
2697 && !elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0))
2698 {
2699 dyn_i->got_offset = x->ofs;
2700 x->ofs += 8;
2701 }
2702 return TRUE;
2703 }
2704
2705 /* Search for the index of a global symbol in it's defining object file. */
2706
2707 static long
2708 global_sym_index (struct elf_link_hash_entry *h)
2709 {
2710 struct elf_link_hash_entry **p;
2711 bfd *obj;
2712
2713 BFD_ASSERT (h->root.type == bfd_link_hash_defined
2714 || h->root.type == bfd_link_hash_defweak);
2715
2716 obj = h->root.u.def.section->owner;
2717 for (p = elf_sym_hashes (obj); *p != h; ++p)
2718 continue;
2719
2720 return p - elf_sym_hashes (obj) + elf_tdata (obj)->symtab_hdr.sh_info;
2721 }
2722
2723 /* Allocate function descriptors. We can do these for every function
2724 in a main executable that is not exported. */
2725
2726 static bfd_boolean
2727 allocate_fptr (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data)
2728 {
2729 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2730
2731 if (dyn_i->want_fptr)
2732 {
2733 struct elf_link_hash_entry *h = dyn_i->h;
2734
2735 if (h)
2736 while (h->root.type == bfd_link_hash_indirect
2737 || h->root.type == bfd_link_hash_warning)
2738 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2739
2740 if (!bfd_link_executable (x->info)
2741 && (!h
2742 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2743 && !UNDEFWEAK_NO_DYNAMIC_RELOC (x->info, h))
2744 || (h->root.type != bfd_link_hash_undefweak
2745 && h->root.type != bfd_link_hash_undefined)))
2746 {
2747 if (h && h->dynindx == -1)
2748 {
2749 BFD_ASSERT ((h->root.type == bfd_link_hash_defined)
2750 || (h->root.type == bfd_link_hash_defweak));
2751
2752 if (!bfd_elf_link_record_local_dynamic_symbol
2753 (x->info, h->root.u.def.section->owner,
2754 global_sym_index (h)))
2755 return FALSE;
2756 }
2757
2758 dyn_i->want_fptr = 0;
2759 }
2760 else if (h == NULL || h->dynindx == -1)
2761 {
2762 dyn_i->fptr_offset = x->ofs;
2763 x->ofs += 16;
2764 }
2765 else
2766 dyn_i->want_fptr = 0;
2767 }
2768 return TRUE;
2769 }
2770
2771 /* Allocate all the minimal PLT entries. */
2772
2773 static bfd_boolean
2774 allocate_plt_entries (struct elfNN_ia64_dyn_sym_info *dyn_i,
2775 void * data)
2776 {
2777 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2778
2779 if (dyn_i->want_plt)
2780 {
2781 struct elf_link_hash_entry *h = dyn_i->h;
2782
2783 if (h)
2784 while (h->root.type == bfd_link_hash_indirect
2785 || h->root.type == bfd_link_hash_warning)
2786 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2787
2788 /* ??? Versioned symbols seem to lose NEEDS_PLT. */
2789 if (elfNN_ia64_dynamic_symbol_p (h, x->info, 0))
2790 {
2791 bfd_size_type offset = x->ofs;
2792 if (offset == 0)
2793 offset = PLT_HEADER_SIZE;
2794 dyn_i->plt_offset = offset;
2795 x->ofs = offset + PLT_MIN_ENTRY_SIZE;
2796
2797 dyn_i->want_pltoff = 1;
2798 }
2799 else
2800 {
2801 dyn_i->want_plt = 0;
2802 dyn_i->want_plt2 = 0;
2803 }
2804 }
2805 return TRUE;
2806 }
2807
2808 /* Allocate all the full PLT entries. */
2809
2810 static bfd_boolean
2811 allocate_plt2_entries (struct elfNN_ia64_dyn_sym_info *dyn_i,
2812 void * data)
2813 {
2814 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2815
2816 if (dyn_i->want_plt2)
2817 {
2818 struct elf_link_hash_entry *h = dyn_i->h;
2819 bfd_size_type ofs = x->ofs;
2820
2821 dyn_i->plt2_offset = ofs;
2822 x->ofs = ofs + PLT_FULL_ENTRY_SIZE;
2823
2824 while (h->root.type == bfd_link_hash_indirect
2825 || h->root.type == bfd_link_hash_warning)
2826 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2827 dyn_i->h->plt.offset = ofs;
2828 }
2829 return TRUE;
2830 }
2831
2832 /* Allocate all the PLTOFF entries requested by relocations and
2833 plt entries. We can't share space with allocated FPTR entries,
2834 because the latter are not necessarily addressable by the GP.
2835 ??? Relaxation might be able to determine that they are. */
2836
2837 static bfd_boolean
2838 allocate_pltoff_entries (struct elfNN_ia64_dyn_sym_info *dyn_i,
2839 void * data)
2840 {
2841 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2842
2843 if (dyn_i->want_pltoff)
2844 {
2845 dyn_i->pltoff_offset = x->ofs;
2846 x->ofs += 16;
2847 }
2848 return TRUE;
2849 }
2850
2851 /* Allocate dynamic relocations for those symbols that turned out
2852 to be dynamic. */
2853
2854 static bfd_boolean
2855 allocate_dynrel_entries (struct elfNN_ia64_dyn_sym_info *dyn_i,
2856 void * data)
2857 {
2858 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2859 struct elfNN_ia64_link_hash_table *ia64_info;
2860 struct elfNN_ia64_dyn_reloc_entry *rent;
2861 bfd_boolean dynamic_symbol, shared, resolved_zero;
2862
2863 ia64_info = elfNN_ia64_hash_table (x->info);
2864 if (ia64_info == NULL)
2865 return FALSE;
2866
2867 /* Note that this can't be used in relation to FPTR relocs below. */
2868 dynamic_symbol = elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0);
2869
2870 shared = bfd_link_pic (x->info);
2871 resolved_zero = (dyn_i->h
2872 && UNDEFWEAK_NO_DYNAMIC_RELOC (x->info,
2873 dyn_i->h));
2874
2875 /* Take care of the GOT and PLT relocations. */
2876
2877 if ((!resolved_zero
2878 && (dynamic_symbol || shared)
2879 && (dyn_i->want_got || dyn_i->want_gotx))
2880 || (dyn_i->want_ltoff_fptr
2881 && dyn_i->h
2882 && dyn_i->h->dynindx != -1))
2883 {
2884 if (!dyn_i->want_ltoff_fptr
2885 || !bfd_link_pie (x->info)
2886 || dyn_i->h == NULL
2887 || dyn_i->h->root.type != bfd_link_hash_undefweak)
2888 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
2889 }
2890 if ((dynamic_symbol || shared) && dyn_i->want_tprel)
2891 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
2892 if (dynamic_symbol && dyn_i->want_dtpmod)
2893 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
2894 if (dynamic_symbol && dyn_i->want_dtprel)
2895 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
2896
2897 if (x->only_got)
2898 return TRUE;
2899
2900 if (ia64_info->rel_fptr_sec && dyn_i->want_fptr)
2901 {
2902 if (dyn_i->h == NULL || dyn_i->h->root.type != bfd_link_hash_undefweak)
2903 ia64_info->rel_fptr_sec->size += sizeof (ElfNN_External_Rela);
2904 }
2905
2906 if (!resolved_zero && dyn_i->want_pltoff)
2907 {
2908 bfd_size_type t = 0;
2909
2910 /* Dynamic symbols get one IPLT relocation. Local symbols in
2911 shared libraries get two REL relocations. Local symbols in
2912 main applications get nothing. */
2913 if (dynamic_symbol)
2914 t = sizeof (ElfNN_External_Rela);
2915 else if (shared)
2916 t = 2 * sizeof (ElfNN_External_Rela);
2917
2918 ia64_info->rel_pltoff_sec->size += t;
2919 }
2920
2921 /* Take care of the normal data relocations. */
2922
2923 for (rent = dyn_i->reloc_entries; rent; rent = rent->next)
2924 {
2925 int count = rent->count;
2926
2927 switch (rent->type)
2928 {
2929 case R_IA64_FPTR32LSB:
2930 case R_IA64_FPTR64LSB:
2931 /* Allocate one iff !want_fptr and not PIE, which by this point
2932 will be true only if we're actually allocating one statically
2933 in the main executable. Position independent executables
2934 need a relative reloc. */
2935 if (dyn_i->want_fptr && !bfd_link_pie (x->info))
2936 continue;
2937 break;
2938 case R_IA64_PCREL32LSB:
2939 case R_IA64_PCREL64LSB:
2940 if (!dynamic_symbol)
2941 continue;
2942 break;
2943 case R_IA64_DIR32LSB:
2944 case R_IA64_DIR64LSB:
2945 if (!dynamic_symbol && !shared)
2946 continue;
2947 break;
2948 case R_IA64_IPLTLSB:
2949 if (!dynamic_symbol && !shared)
2950 continue;
2951 /* Use two REL relocations for IPLT relocations
2952 against local symbols. */
2953 if (!dynamic_symbol)
2954 count *= 2;
2955 break;
2956 case R_IA64_DTPREL32LSB:
2957 case R_IA64_TPREL64LSB:
2958 case R_IA64_DTPREL64LSB:
2959 case R_IA64_DTPMOD64LSB:
2960 break;
2961 default:
2962 abort ();
2963 }
2964 if (rent->reltext)
2965 ia64_info->reltext = 1;
2966 rent->srel->size += sizeof (ElfNN_External_Rela) * count;
2967 }
2968
2969 return TRUE;
2970 }
2971
2972 static bfd_boolean
2973 elfNN_ia64_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
2974 struct elf_link_hash_entry *h)
2975 {
2976 /* ??? Undefined symbols with PLT entries should be re-defined
2977 to be the PLT entry. */
2978
2979 /* If this is a weak symbol, and there is a real definition, the
2980 processor independent code will have arranged for us to see the
2981 real definition first, and we can just use the same value. */
2982 if (h->is_weakalias)
2983 {
2984 struct elf_link_hash_entry *def = weakdef (h);
2985 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2986 h->root.u.def.section = def->root.u.def.section;
2987 h->root.u.def.value = def->root.u.def.value;
2988 return TRUE;
2989 }
2990
2991 /* If this is a reference to a symbol defined by a dynamic object which
2992 is not a function, we might allocate the symbol in our .dynbss section
2993 and allocate a COPY dynamic relocation.
2994
2995 But IA-64 code is canonically PIC, so as a rule we can avoid this sort
2996 of hackery. */
2997
2998 return TRUE;
2999 }
3000
3001 static bfd_boolean
3002 elfNN_ia64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3003 struct bfd_link_info *info)
3004 {
3005 struct elfNN_ia64_allocate_data data;
3006 struct elfNN_ia64_link_hash_table *ia64_info;
3007 asection *sec;
3008 bfd *dynobj;
3009 bfd_boolean relplt = FALSE;
3010
3011 ia64_info = elfNN_ia64_hash_table (info);
3012 if (ia64_info == NULL)
3013 return FALSE;
3014 dynobj = ia64_info->root.dynobj;
3015 ia64_info->self_dtpmod_offset = (bfd_vma) -1;
3016 BFD_ASSERT(dynobj != NULL);
3017 data.info = info;
3018
3019 /* Set the contents of the .interp section to the interpreter. */
3020 if (ia64_info->root.dynamic_sections_created
3021 && bfd_link_executable (info) && !info->nointerp)
3022 {
3023 sec = bfd_get_linker_section (dynobj, ".interp");
3024 BFD_ASSERT (sec != NULL);
3025 sec->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
3026 sec->size = strlen (ELF_DYNAMIC_INTERPRETER) + 1;
3027 }
3028
3029 /* Allocate the GOT entries. */
3030
3031 if (ia64_info->root.sgot)
3032 {
3033 data.ofs = 0;
3034 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data);
3035 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data);
3036 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data);
3037 ia64_info->root.sgot->size = data.ofs;
3038 }
3039
3040 /* Allocate the FPTR entries. */
3041
3042 if (ia64_info->fptr_sec)
3043 {
3044 data.ofs = 0;
3045 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_fptr, &data);
3046 ia64_info->fptr_sec->size = data.ofs;
3047 }
3048
3049 /* Now that we've seen all of the input files, we can decide which
3050 symbols need plt entries. Allocate the minimal PLT entries first.
3051 We do this even though dynamic_sections_created may be FALSE, because
3052 this has the side-effect of clearing want_plt and want_plt2. */
3053
3054 data.ofs = 0;
3055 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_plt_entries, &data);
3056
3057 ia64_info->minplt_entries = 0;
3058 if (data.ofs)
3059 {
3060 ia64_info->minplt_entries
3061 = (data.ofs - PLT_HEADER_SIZE) / PLT_MIN_ENTRY_SIZE;
3062 }
3063
3064 /* Align the pointer for the plt2 entries. */
3065 data.ofs = (data.ofs + 31) & (bfd_vma) -32;
3066
3067 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_plt2_entries, &data);
3068 if (data.ofs != 0 || ia64_info->root.dynamic_sections_created)
3069 {
3070 /* FIXME: we always reserve the memory for dynamic linker even if
3071 there are no PLT entries since dynamic linker may assume the
3072 reserved memory always exists. */
3073
3074 BFD_ASSERT (ia64_info->root.dynamic_sections_created);
3075
3076 ia64_info->root.splt->size = data.ofs;
3077
3078 /* If we've got a .plt, we need some extra memory for the dynamic
3079 linker. We stuff these in .got.plt. */
3080 ia64_info->root.sgotplt->size = 8 * PLT_RESERVED_WORDS;
3081 }
3082
3083 /* Allocate the PLTOFF entries. */
3084
3085 if (ia64_info->pltoff_sec)
3086 {
3087 data.ofs = 0;
3088 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_pltoff_entries, &data);
3089 ia64_info->pltoff_sec->size = data.ofs;
3090 }
3091
3092 if (ia64_info->root.dynamic_sections_created)
3093 {
3094 /* Allocate space for the dynamic relocations that turned out to be
3095 required. */
3096
3097 if (bfd_link_pic (info) && ia64_info->self_dtpmod_offset != (bfd_vma) -1)
3098 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
3099 data.only_got = FALSE;
3100 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_dynrel_entries, &data);
3101 }
3102
3103 /* We have now determined the sizes of the various dynamic sections.
3104 Allocate memory for them. */
3105 for (sec = dynobj->sections; sec != NULL; sec = sec->next)
3106 {
3107 bfd_boolean strip;
3108
3109 if (!(sec->flags & SEC_LINKER_CREATED))
3110 continue;
3111
3112 /* If we don't need this section, strip it from the output file.
3113 There were several sections primarily related to dynamic
3114 linking that must be create before the linker maps input
3115 sections to output sections. The linker does that before
3116 bfd_elf_size_dynamic_sections is called, and it is that
3117 function which decides whether anything needs to go into
3118 these sections. */
3119
3120 strip = (sec->size == 0);
3121
3122 if (sec == ia64_info->root.sgot)
3123 strip = FALSE;
3124 else if (sec == ia64_info->root.srelgot)
3125 {
3126 if (strip)
3127 ia64_info->root.srelgot = NULL;
3128 else
3129 /* We use the reloc_count field as a counter if we need to
3130 copy relocs into the output file. */
3131 sec->reloc_count = 0;
3132 }
3133 else if (sec == ia64_info->fptr_sec)
3134 {
3135 if (strip)
3136 ia64_info->fptr_sec = NULL;
3137 }
3138 else if (sec == ia64_info->rel_fptr_sec)
3139 {
3140 if (strip)
3141 ia64_info->rel_fptr_sec = NULL;
3142 else
3143 /* We use the reloc_count field as a counter if we need to
3144 copy relocs into the output file. */
3145 sec->reloc_count = 0;
3146 }
3147 else if (sec == ia64_info->root.splt)
3148 {
3149 if (strip)
3150 ia64_info->root.splt = NULL;
3151 }
3152 else if (sec == ia64_info->pltoff_sec)
3153 {
3154 if (strip)
3155 ia64_info->pltoff_sec = NULL;
3156 }
3157 else if (sec == ia64_info->rel_pltoff_sec)
3158 {
3159 if (strip)
3160 ia64_info->rel_pltoff_sec = NULL;
3161 else
3162 {
3163 relplt = TRUE;
3164 /* We use the reloc_count field as a counter if we need to
3165 copy relocs into the output file. */
3166 sec->reloc_count = 0;
3167 }
3168 }
3169 else
3170 {
3171 const char *name;
3172
3173 /* It's OK to base decisions on the section name, because none
3174 of the dynobj section names depend upon the input files. */
3175 name = bfd_get_section_name (dynobj, sec);
3176
3177 if (strcmp (name, ".got.plt") == 0)
3178 strip = FALSE;
3179 else if (CONST_STRNEQ (name, ".rel"))
3180 {
3181 if (!strip)
3182 {
3183 /* We use the reloc_count field as a counter if we need to
3184 copy relocs into the output file. */
3185 sec->reloc_count = 0;
3186 }
3187 }
3188 else
3189 continue;
3190 }
3191
3192 if (strip)
3193 sec->flags |= SEC_EXCLUDE;
3194 else
3195 {
3196 /* Allocate memory for the section contents. */
3197 sec->contents = (bfd_byte *) bfd_zalloc (dynobj, sec->size);
3198 if (sec->contents == NULL && sec->size != 0)
3199 return FALSE;
3200 }
3201 }
3202
3203 if (ia64_info->root.dynamic_sections_created)
3204 {
3205 /* Add some entries to the .dynamic section. We fill in the values
3206 later (in finish_dynamic_sections) but we must add the entries now
3207 so that we get the correct size for the .dynamic section. */
3208
3209 if (bfd_link_executable (info))
3210 {
3211 /* The DT_DEBUG entry is filled in by the dynamic linker and used
3212 by the debugger. */
3213 #define add_dynamic_entry(TAG, VAL) \
3214 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3215
3216 if (!add_dynamic_entry (DT_DEBUG, 0))
3217 return FALSE;
3218 }
3219
3220 if (!add_dynamic_entry (DT_IA_64_PLT_RESERVE, 0))
3221 return FALSE;
3222 if (!add_dynamic_entry (DT_PLTGOT, 0))
3223 return FALSE;
3224
3225 if (relplt)
3226 {
3227 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3228 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3229 || !add_dynamic_entry (DT_JMPREL, 0))
3230 return FALSE;
3231 }
3232
3233 if (!add_dynamic_entry (DT_RELA, 0)
3234 || !add_dynamic_entry (DT_RELASZ, 0)
3235 || !add_dynamic_entry (DT_RELAENT, sizeof (ElfNN_External_Rela)))
3236 return FALSE;
3237
3238 if (ia64_info->reltext)
3239 {
3240 if (!add_dynamic_entry (DT_TEXTREL, 0))
3241 return FALSE;
3242 info->flags |= DF_TEXTREL;
3243 }
3244 }
3245
3246 /* ??? Perhaps force __gp local. */
3247
3248 return TRUE;
3249 }
3250
3251 static void
3252 elfNN_ia64_install_dyn_reloc (bfd *abfd, struct bfd_link_info *info,
3253 asection *sec, asection *srel,
3254 bfd_vma offset, unsigned int type,
3255 long dynindx, bfd_vma addend)
3256 {
3257 Elf_Internal_Rela outrel;
3258 bfd_byte *loc;
3259
3260 BFD_ASSERT (dynindx != -1);
3261 outrel.r_info = ELFNN_R_INFO (dynindx, type);
3262 outrel.r_addend = addend;
3263 outrel.r_offset = _bfd_elf_section_offset (abfd, info, sec, offset);
3264 if (outrel.r_offset >= (bfd_vma) -2)
3265 {
3266 /* Run for the hills. We shouldn't be outputting a relocation
3267 for this. So do what everyone else does and output a no-op. */
3268 outrel.r_info = ELFNN_R_INFO (0, R_IA64_NONE);
3269 outrel.r_addend = 0;
3270 outrel.r_offset = 0;
3271 }
3272 else
3273 outrel.r_offset += sec->output_section->vma + sec->output_offset;
3274
3275 loc = srel->contents;
3276 loc += srel->reloc_count++ * sizeof (ElfNN_External_Rela);
3277 bfd_elfNN_swap_reloca_out (abfd, &outrel, loc);
3278 BFD_ASSERT (sizeof (ElfNN_External_Rela) * srel->reloc_count <= srel->size);
3279 }
3280
3281 /* Store an entry for target address TARGET_ADDR in the linkage table
3282 and return the gp-relative address of the linkage table entry. */
3283
3284 static bfd_vma
3285 set_got_entry (bfd *abfd, struct bfd_link_info *info,
3286 struct elfNN_ia64_dyn_sym_info *dyn_i,
3287 long dynindx, bfd_vma addend, bfd_vma value,
3288 unsigned int dyn_r_type)
3289 {
3290 struct elfNN_ia64_link_hash_table *ia64_info;
3291 asection *got_sec;
3292 bfd_boolean done;
3293 bfd_vma got_offset;
3294
3295 ia64_info = elfNN_ia64_hash_table (info);
3296 if (ia64_info == NULL)
3297 return 0;
3298
3299 got_sec = ia64_info->root.sgot;
3300
3301 switch (dyn_r_type)
3302 {
3303 case R_IA64_TPREL64LSB:
3304 done = dyn_i->tprel_done;
3305 dyn_i->tprel_done = TRUE;
3306 got_offset = dyn_i->tprel_offset;
3307 break;
3308 case R_IA64_DTPMOD64LSB:
3309 if (dyn_i->dtpmod_offset != ia64_info->self_dtpmod_offset)
3310 {
3311 done = dyn_i->dtpmod_done;
3312 dyn_i->dtpmod_done = TRUE;
3313 }
3314 else
3315 {
3316 done = ia64_info->self_dtpmod_done;
3317 ia64_info->self_dtpmod_done = TRUE;
3318 dynindx = 0;
3319 }
3320 got_offset = dyn_i->dtpmod_offset;
3321 break;
3322 case R_IA64_DTPREL32LSB:
3323 case R_IA64_DTPREL64LSB:
3324 done = dyn_i->dtprel_done;
3325 dyn_i->dtprel_done = TRUE;
3326 got_offset = dyn_i->dtprel_offset;
3327 break;
3328 default:
3329 done = dyn_i->got_done;
3330 dyn_i->got_done = TRUE;
3331 got_offset = dyn_i->got_offset;
3332 break;
3333 }
3334
3335 BFD_ASSERT ((got_offset & 7) == 0);
3336
3337 if (! done)
3338 {
3339 /* Store the target address in the linkage table entry. */
3340 bfd_put_64 (abfd, value, got_sec->contents + got_offset);
3341
3342 /* Install a dynamic relocation if needed. */
3343 if (((bfd_link_pic (info)
3344 && (!dyn_i->h
3345 || (ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT
3346 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, dyn_i->h))
3347 || dyn_i->h->root.type != bfd_link_hash_undefweak)
3348 && dyn_r_type != R_IA64_DTPREL32LSB
3349 && dyn_r_type != R_IA64_DTPREL64LSB)
3350 || elfNN_ia64_dynamic_symbol_p (dyn_i->h, info, dyn_r_type)
3351 || (dynindx != -1
3352 && (dyn_r_type == R_IA64_FPTR32LSB
3353 || dyn_r_type == R_IA64_FPTR64LSB)))
3354 && (!dyn_i->want_ltoff_fptr
3355 || !bfd_link_pie (info)
3356 || !dyn_i->h
3357 || dyn_i->h->root.type != bfd_link_hash_undefweak))
3358 {
3359 if (dynindx == -1
3360 && dyn_r_type != R_IA64_TPREL64LSB
3361 && dyn_r_type != R_IA64_DTPMOD64LSB
3362 && dyn_r_type != R_IA64_DTPREL32LSB
3363 && dyn_r_type != R_IA64_DTPREL64LSB)
3364 {
3365 dyn_r_type = R_IA64_RELNNLSB;
3366 dynindx = 0;
3367 addend = value;
3368 }
3369
3370 if (bfd_big_endian (abfd))
3371 {
3372 switch (dyn_r_type)
3373 {
3374 case R_IA64_REL32LSB:
3375 dyn_r_type = R_IA64_REL32MSB;
3376 break;
3377 case R_IA64_DIR32LSB:
3378 dyn_r_type = R_IA64_DIR32MSB;
3379 break;
3380 case R_IA64_FPTR32LSB:
3381 dyn_r_type = R_IA64_FPTR32MSB;
3382 break;
3383 case R_IA64_DTPREL32LSB:
3384 dyn_r_type = R_IA64_DTPREL32MSB;
3385 break;
3386 case R_IA64_REL64LSB:
3387 dyn_r_type = R_IA64_REL64MSB;
3388 break;
3389 case R_IA64_DIR64LSB:
3390 dyn_r_type = R_IA64_DIR64MSB;
3391 break;
3392 case R_IA64_FPTR64LSB:
3393 dyn_r_type = R_IA64_FPTR64MSB;
3394 break;
3395 case R_IA64_TPREL64LSB:
3396 dyn_r_type = R_IA64_TPREL64MSB;
3397 break;
3398 case R_IA64_DTPMOD64LSB:
3399 dyn_r_type = R_IA64_DTPMOD64MSB;
3400 break;
3401 case R_IA64_DTPREL64LSB:
3402 dyn_r_type = R_IA64_DTPREL64MSB;
3403 break;
3404 default:
3405 BFD_ASSERT (FALSE);
3406 break;
3407 }
3408 }
3409
3410 elfNN_ia64_install_dyn_reloc (abfd, NULL, got_sec,
3411 ia64_info->root.srelgot,
3412 got_offset, dyn_r_type,
3413 dynindx, addend);
3414 }
3415 }
3416
3417 /* Return the address of the linkage table entry. */
3418 value = (got_sec->output_section->vma
3419 + got_sec->output_offset
3420 + got_offset);
3421
3422 return value;
3423 }
3424
3425 /* Fill in a function descriptor consisting of the function's code
3426 address and its global pointer. Return the descriptor's address. */
3427
3428 static bfd_vma
3429 set_fptr_entry (bfd *abfd, struct bfd_link_info *info,
3430 struct elfNN_ia64_dyn_sym_info *dyn_i,
3431 bfd_vma value)
3432 {
3433 struct elfNN_ia64_link_hash_table *ia64_info;
3434 asection *fptr_sec;
3435
3436 ia64_info = elfNN_ia64_hash_table (info);
3437 if (ia64_info == NULL)
3438 return 0;
3439
3440 fptr_sec = ia64_info->fptr_sec;
3441
3442 if (!dyn_i->fptr_done)
3443 {
3444 dyn_i->fptr_done = 1;
3445
3446 /* Fill in the function descriptor. */
3447 bfd_put_64 (abfd, value, fptr_sec->contents + dyn_i->fptr_offset);
3448 bfd_put_64 (abfd, _bfd_get_gp_value (abfd),
3449 fptr_sec->contents + dyn_i->fptr_offset + 8);
3450 if (ia64_info->rel_fptr_sec)
3451 {
3452 Elf_Internal_Rela outrel;
3453 bfd_byte *loc;
3454
3455 if (bfd_little_endian (abfd))
3456 outrel.r_info = ELFNN_R_INFO (0, R_IA64_IPLTLSB);
3457 else
3458 outrel.r_info = ELFNN_R_INFO (0, R_IA64_IPLTMSB);
3459 outrel.r_addend = value;
3460 outrel.r_offset = (fptr_sec->output_section->vma
3461 + fptr_sec->output_offset
3462 + dyn_i->fptr_offset);
3463 loc = ia64_info->rel_fptr_sec->contents;
3464 loc += ia64_info->rel_fptr_sec->reloc_count++
3465 * sizeof (ElfNN_External_Rela);
3466 bfd_elfNN_swap_reloca_out (abfd, &outrel, loc);
3467 }
3468 }
3469
3470 /* Return the descriptor's address. */
3471 value = (fptr_sec->output_section->vma
3472 + fptr_sec->output_offset
3473 + dyn_i->fptr_offset);
3474
3475 return value;
3476 }
3477
3478 /* Fill in a PLTOFF entry consisting of the function's code address
3479 and its global pointer. Return the descriptor's address. */
3480
3481 static bfd_vma
3482 set_pltoff_entry (bfd *abfd, struct bfd_link_info *info,
3483 struct elfNN_ia64_dyn_sym_info *dyn_i,
3484 bfd_vma value, bfd_boolean is_plt)
3485 {
3486 struct elfNN_ia64_link_hash_table *ia64_info;
3487 asection *pltoff_sec;
3488
3489 ia64_info = elfNN_ia64_hash_table (info);
3490 if (ia64_info == NULL)
3491 return 0;
3492
3493 pltoff_sec = ia64_info->pltoff_sec;
3494
3495 /* Don't do anything if this symbol uses a real PLT entry. In
3496 that case, we'll fill this in during finish_dynamic_symbol. */
3497 if ((! dyn_i->want_plt || is_plt)
3498 && !dyn_i->pltoff_done)
3499 {
3500 bfd_vma gp = _bfd_get_gp_value (abfd);
3501
3502 /* Fill in the function descriptor. */
3503 bfd_put_64 (abfd, value, pltoff_sec->contents + dyn_i->pltoff_offset);
3504 bfd_put_64 (abfd, gp, pltoff_sec->contents + dyn_i->pltoff_offset + 8);
3505
3506 /* Install dynamic relocations if needed. */
3507 if (!is_plt
3508 && bfd_link_pic (info)
3509 && (!dyn_i->h
3510 || (ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT
3511 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, dyn_i->h))
3512 || dyn_i->h->root.type != bfd_link_hash_undefweak))
3513 {
3514 unsigned int dyn_r_type;
3515
3516 if (bfd_big_endian (abfd))
3517 dyn_r_type = R_IA64_RELNNMSB;
3518 else
3519 dyn_r_type = R_IA64_RELNNLSB;
3520
3521 elfNN_ia64_install_dyn_reloc (abfd, NULL, pltoff_sec,
3522 ia64_info->rel_pltoff_sec,
3523 dyn_i->pltoff_offset,
3524 dyn_r_type, 0, value);
3525 elfNN_ia64_install_dyn_reloc (abfd, NULL, pltoff_sec,
3526 ia64_info->rel_pltoff_sec,
3527 dyn_i->pltoff_offset + ARCH_SIZE / 8,
3528 dyn_r_type, 0, gp);
3529 }
3530
3531 dyn_i->pltoff_done = 1;
3532 }
3533
3534 /* Return the descriptor's address. */
3535 value = (pltoff_sec->output_section->vma
3536 + pltoff_sec->output_offset
3537 + dyn_i->pltoff_offset);
3538
3539 return value;
3540 }
3541
3542 /* Return the base VMA address which should be subtracted from real addresses
3543 when resolving @tprel() relocation.
3544 Main program TLS (whose template starts at PT_TLS p_vaddr)
3545 is assigned offset round(2 * size of pointer, PT_TLS p_align). */
3546
3547 static bfd_vma
3548 elfNN_ia64_tprel_base (struct bfd_link_info *info)
3549 {
3550 asection *tls_sec = elf_hash_table (info)->tls_sec;
3551 return tls_sec->vma - align_power ((bfd_vma) ARCH_SIZE / 4,
3552 tls_sec->alignment_power);
3553 }
3554
3555 /* Return the base VMA address which should be subtracted from real addresses
3556 when resolving @dtprel() relocation.
3557 This is PT_TLS segment p_vaddr. */
3558
3559 static bfd_vma
3560 elfNN_ia64_dtprel_base (struct bfd_link_info *info)
3561 {
3562 return elf_hash_table (info)->tls_sec->vma;
3563 }
3564
3565 /* Called through qsort to sort the .IA_64.unwind section during a
3566 non-relocatable link. Set elfNN_ia64_unwind_entry_compare_bfd
3567 to the output bfd so we can do proper endianness frobbing. */
3568
3569 static bfd *elfNN_ia64_unwind_entry_compare_bfd;
3570
3571 static int
3572 elfNN_ia64_unwind_entry_compare (const void * a, const void * b)
3573 {
3574 bfd_vma av, bv;
3575
3576 av = bfd_get_64 (elfNN_ia64_unwind_entry_compare_bfd, a);
3577 bv = bfd_get_64 (elfNN_ia64_unwind_entry_compare_bfd, b);
3578
3579 return (av < bv ? -1 : av > bv ? 1 : 0);
3580 }
3581
3582 /* Make sure we've got ourselves a nice fat __gp value. */
3583 static bfd_boolean
3584 elfNN_ia64_choose_gp (bfd *abfd, struct bfd_link_info *info, bfd_boolean final)
3585 {
3586 bfd_vma min_vma = (bfd_vma) -1, max_vma = 0;
3587 bfd_vma min_short_vma = min_vma, max_short_vma = 0;
3588 struct elf_link_hash_entry *gp;
3589 bfd_vma gp_val;
3590 asection *os;
3591 struct elfNN_ia64_link_hash_table *ia64_info;
3592
3593 ia64_info = elfNN_ia64_hash_table (info);
3594 if (ia64_info == NULL)
3595 return FALSE;
3596
3597 /* Find the min and max vma of all sections marked short. Also collect
3598 min and max vma of any type, for use in selecting a nice gp. */
3599 for (os = abfd->sections; os ; os = os->next)
3600 {
3601 bfd_vma lo, hi;
3602
3603 if ((os->flags & SEC_ALLOC) == 0)
3604 continue;
3605
3606 lo = os->vma;
3607 /* When this function is called from elfNN_ia64_final_link
3608 the correct value to use is os->size. When called from
3609 elfNN_ia64_relax_section we are in the middle of section
3610 sizing; some sections will already have os->size set, others
3611 will have os->size zero and os->rawsize the previous size. */
3612 hi = os->vma + (!final && os->rawsize ? os->rawsize : os->size);
3613 if (hi < lo)
3614 hi = (bfd_vma) -1;
3615
3616 if (min_vma > lo)
3617 min_vma = lo;
3618 if (max_vma < hi)
3619 max_vma = hi;
3620 if (os->flags & SEC_SMALL_DATA)
3621 {
3622 if (min_short_vma > lo)
3623 min_short_vma = lo;
3624 if (max_short_vma < hi)
3625 max_short_vma = hi;
3626 }
3627 }
3628
3629 if (ia64_info->min_short_sec)
3630 {
3631 if (min_short_vma
3632 > (ia64_info->min_short_sec->vma
3633 + ia64_info->min_short_offset))
3634 min_short_vma = (ia64_info->min_short_sec->vma
3635 + ia64_info->min_short_offset);
3636 if (max_short_vma
3637 < (ia64_info->max_short_sec->vma
3638 + ia64_info->max_short_offset))
3639 max_short_vma = (ia64_info->max_short_sec->vma
3640 + ia64_info->max_short_offset);
3641 }
3642
3643 /* See if the user wants to force a value. */
3644 gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", FALSE,
3645 FALSE, FALSE);
3646
3647 if (gp
3648 && (gp->root.type == bfd_link_hash_defined
3649 || gp->root.type == bfd_link_hash_defweak))
3650 {
3651 asection *gp_sec = gp->root.u.def.section;
3652 gp_val = (gp->root.u.def.value
3653 + gp_sec->output_section->vma
3654 + gp_sec->output_offset);
3655 }
3656 else
3657 {
3658 /* Pick a sensible value. */
3659
3660 if (ia64_info->min_short_sec)
3661 {
3662 bfd_vma short_range = max_short_vma - min_short_vma;
3663
3664 /* If min_short_sec is set, pick one in the middle bewteen
3665 min_short_vma and max_short_vma. */
3666 if (short_range >= 0x400000)
3667 goto overflow;
3668 gp_val = min_short_vma + short_range / 2;
3669 }
3670 else
3671 {
3672 asection *got_sec = ia64_info->root.sgot;
3673
3674 /* Start with just the address of the .got. */
3675 if (got_sec)
3676 gp_val = got_sec->output_section->vma;
3677 else if (max_short_vma != 0)
3678 gp_val = min_short_vma;
3679 else if (max_vma - min_vma < 0x200000)
3680 gp_val = min_vma;
3681 else
3682 gp_val = max_vma - 0x200000 + 8;
3683 }
3684
3685 /* If it is possible to address the entire image, but we
3686 don't with the choice above, adjust. */
3687 if (max_vma - min_vma < 0x400000
3688 && (max_vma - gp_val >= 0x200000
3689 || gp_val - min_vma > 0x200000))
3690 gp_val = min_vma + 0x200000;
3691 else if (max_short_vma != 0)
3692 {
3693 /* If we don't cover all the short data, adjust. */
3694 if (max_short_vma - gp_val >= 0x200000)
3695 gp_val = min_short_vma + 0x200000;
3696
3697 /* If we're addressing stuff past the end, adjust back. */
3698 if (gp_val > max_vma)
3699 gp_val = max_vma - 0x200000 + 8;
3700 }
3701 }
3702
3703 /* Validate whether all SHF_IA_64_SHORT sections are within
3704 range of the chosen GP. */
3705
3706 if (max_short_vma != 0)
3707 {
3708 if (max_short_vma - min_short_vma >= 0x400000)
3709 {
3710 overflow:
3711 _bfd_error_handler
3712 /* xgettext:c-format */
3713 (_("%pB: short data segment overflowed (%#" PRIx64 " >= 0x400000)"),
3714 abfd, (uint64_t) (max_short_vma - min_short_vma));
3715 return FALSE;
3716 }
3717 else if ((gp_val > min_short_vma
3718 && gp_val - min_short_vma > 0x200000)
3719 || (gp_val < max_short_vma
3720 && max_short_vma - gp_val >= 0x200000))
3721 {
3722 _bfd_error_handler
3723 (_("%pB: __gp does not cover short data segment"), abfd);
3724 return FALSE;
3725 }
3726 }
3727
3728 _bfd_set_gp_value (abfd, gp_val);
3729
3730 return TRUE;
3731 }
3732
3733 static bfd_boolean
3734 elfNN_ia64_final_link (bfd *abfd, struct bfd_link_info *info)
3735 {
3736 struct elfNN_ia64_link_hash_table *ia64_info;
3737 asection *unwind_output_sec;
3738
3739 ia64_info = elfNN_ia64_hash_table (info);
3740 if (ia64_info == NULL)
3741 return FALSE;
3742
3743 /* Make sure we've got ourselves a nice fat __gp value. */
3744 if (!bfd_link_relocatable (info))
3745 {
3746 bfd_vma gp_val;
3747 struct elf_link_hash_entry *gp;
3748
3749 /* We assume after gp is set, section size will only decrease. We
3750 need to adjust gp for it. */
3751 _bfd_set_gp_value (abfd, 0);
3752 if (! elfNN_ia64_choose_gp (abfd, info, TRUE))
3753 return FALSE;
3754 gp_val = _bfd_get_gp_value (abfd);
3755
3756 gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", FALSE,
3757 FALSE, FALSE);
3758 if (gp)
3759 {
3760 gp->root.type = bfd_link_hash_defined;
3761 gp->root.u.def.value = gp_val;
3762 gp->root.u.def.section = bfd_abs_section_ptr;
3763 }
3764 }
3765
3766 /* If we're producing a final executable, we need to sort the contents
3767 of the .IA_64.unwind section. Force this section to be relocated
3768 into memory rather than written immediately to the output file. */
3769 unwind_output_sec = NULL;
3770 if (!bfd_link_relocatable (info))
3771 {
3772 asection *s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_unwind);
3773 if (s)
3774 {
3775 unwind_output_sec = s->output_section;
3776 unwind_output_sec->contents
3777 = bfd_malloc (unwind_output_sec->size);
3778 if (unwind_output_sec->contents == NULL)
3779 return FALSE;
3780 }
3781 }
3782
3783 /* Invoke the regular ELF backend linker to do all the work. */
3784 if (!bfd_elf_final_link (abfd, info))
3785 return FALSE;
3786
3787 if (unwind_output_sec)
3788 {
3789 elfNN_ia64_unwind_entry_compare_bfd = abfd;
3790 qsort (unwind_output_sec->contents,
3791 (size_t) (unwind_output_sec->size / 24),
3792 24,
3793 elfNN_ia64_unwind_entry_compare);
3794
3795 if (! bfd_set_section_contents (abfd, unwind_output_sec,
3796 unwind_output_sec->contents, (bfd_vma) 0,
3797 unwind_output_sec->size))
3798 return FALSE;
3799 }
3800
3801 return TRUE;
3802 }
3803
3804 static bfd_boolean
3805 elfNN_ia64_relocate_section (bfd *output_bfd,
3806 struct bfd_link_info *info,
3807 bfd *input_bfd,
3808 asection *input_section,
3809 bfd_byte *contents,
3810 Elf_Internal_Rela *relocs,
3811 Elf_Internal_Sym *local_syms,
3812 asection **local_sections)
3813 {
3814 struct elfNN_ia64_link_hash_table *ia64_info;
3815 Elf_Internal_Shdr *symtab_hdr;
3816 Elf_Internal_Rela *rel;
3817 Elf_Internal_Rela *relend;
3818 asection *srel;
3819 bfd_boolean ret_val = TRUE; /* for non-fatal errors */
3820 bfd_vma gp_val;
3821
3822 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3823 ia64_info = elfNN_ia64_hash_table (info);
3824 if (ia64_info == NULL)
3825 return FALSE;
3826
3827 /* Infect various flags from the input section to the output section. */
3828 if (bfd_link_relocatable (info))
3829 {
3830 bfd_vma flags;
3831
3832 flags = elf_section_data(input_section)->this_hdr.sh_flags;
3833 flags &= SHF_IA_64_NORECOV;
3834
3835 elf_section_data(input_section->output_section)
3836 ->this_hdr.sh_flags |= flags;
3837 }
3838
3839 gp_val = _bfd_get_gp_value (output_bfd);
3840 srel = get_reloc_section (input_bfd, ia64_info, input_section, FALSE);
3841
3842 rel = relocs;
3843 relend = relocs + input_section->reloc_count;
3844 for (; rel < relend; ++rel)
3845 {
3846 struct elf_link_hash_entry *h;
3847 struct elfNN_ia64_dyn_sym_info *dyn_i;
3848 bfd_reloc_status_type r;
3849 reloc_howto_type *howto;
3850 unsigned long r_symndx;
3851 Elf_Internal_Sym *sym;
3852 unsigned int r_type;
3853 bfd_vma value;
3854 asection *sym_sec;
3855 bfd_byte *hit_addr;
3856 bfd_boolean dynamic_symbol_p;
3857 bfd_boolean undef_weak_ref;
3858
3859 r_type = ELFNN_R_TYPE (rel->r_info);
3860 if (r_type > R_IA64_MAX_RELOC_CODE)
3861 {
3862 /* xgettext:c-format */
3863 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
3864 input_bfd, (int) r_type);
3865 bfd_set_error (bfd_error_bad_value);
3866 ret_val = FALSE;
3867 continue;
3868 }
3869
3870 howto = ia64_elf_lookup_howto (r_type);
3871 if (howto == NULL)
3872 {
3873 ret_val = FALSE;
3874 continue;
3875 }
3876
3877 r_symndx = ELFNN_R_SYM (rel->r_info);
3878 h = NULL;
3879 sym = NULL;
3880 sym_sec = NULL;
3881 undef_weak_ref = FALSE;
3882
3883 if (r_symndx < symtab_hdr->sh_info)
3884 {
3885 /* Reloc against local symbol. */
3886 asection *msec;
3887 sym = local_syms + r_symndx;
3888 sym_sec = local_sections[r_symndx];
3889 msec = sym_sec;
3890 value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel);
3891 if (!bfd_link_relocatable (info)
3892 && (sym_sec->flags & SEC_MERGE) != 0
3893 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
3894 && sym_sec->sec_info_type == SEC_INFO_TYPE_MERGE)
3895 {
3896 struct elfNN_ia64_local_hash_entry *loc_h;
3897
3898 loc_h = get_local_sym_hash (ia64_info, input_bfd, rel, FALSE);
3899 if (loc_h && ! loc_h->sec_merge_done)
3900 {
3901 struct elfNN_ia64_dyn_sym_info *dynent;
3902 unsigned int count;
3903
3904 for (count = loc_h->count, dynent = loc_h->info;
3905 count != 0;
3906 count--, dynent++)
3907 {
3908 msec = sym_sec;
3909 dynent->addend =
3910 _bfd_merged_section_offset (output_bfd, &msec,
3911 elf_section_data (msec)->
3912 sec_info,
3913 sym->st_value
3914 + dynent->addend);
3915 dynent->addend -= sym->st_value;
3916 dynent->addend += msec->output_section->vma
3917 + msec->output_offset
3918 - sym_sec->output_section->vma
3919 - sym_sec->output_offset;
3920 }
3921
3922 /* We may have introduced duplicated entries. We need
3923 to remove them properly. */
3924 count = sort_dyn_sym_info (loc_h->info, loc_h->count);
3925 if (count != loc_h->count)
3926 {
3927 loc_h->count = count;
3928 loc_h->sorted_count = count;
3929 }
3930
3931 loc_h->sec_merge_done = 1;
3932 }
3933 }
3934 }
3935 else
3936 {
3937 bfd_boolean unresolved_reloc;
3938 bfd_boolean warned, ignored;
3939 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
3940
3941 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3942 r_symndx, symtab_hdr, sym_hashes,
3943 h, sym_sec, value,
3944 unresolved_reloc, warned, ignored);
3945
3946 if (h->root.type == bfd_link_hash_undefweak)
3947 undef_weak_ref = TRUE;
3948 else if (warned || (ignored && bfd_link_executable (info)))
3949 continue;
3950 }
3951
3952 if (sym_sec != NULL && discarded_section (sym_sec))
3953 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3954 rel, 1, relend, howto, 0, contents);
3955
3956 if (bfd_link_relocatable (info))
3957 continue;
3958
3959 hit_addr = contents + rel->r_offset;
3960 value += rel->r_addend;
3961 dynamic_symbol_p = elfNN_ia64_dynamic_symbol_p (h, info, r_type);
3962
3963 switch (r_type)
3964 {
3965 case R_IA64_NONE:
3966 case R_IA64_LDXMOV:
3967 continue;
3968
3969 case R_IA64_IMM14:
3970 case R_IA64_IMM22:
3971 case R_IA64_IMM64:
3972 case R_IA64_DIR32MSB:
3973 case R_IA64_DIR32LSB:
3974 case R_IA64_DIR64MSB:
3975 case R_IA64_DIR64LSB:
3976 /* Install a dynamic relocation for this reloc. */
3977 if ((dynamic_symbol_p || bfd_link_pic (info))
3978 && !(h && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3979 && r_symndx != STN_UNDEF
3980 && (input_section->flags & SEC_ALLOC) != 0)
3981 {
3982 unsigned int dyn_r_type;
3983 long dynindx;
3984 bfd_vma addend;
3985
3986 BFD_ASSERT (srel != NULL);
3987
3988 switch (r_type)
3989 {
3990 case R_IA64_IMM14:
3991 case R_IA64_IMM22:
3992 case R_IA64_IMM64:
3993 /* ??? People shouldn't be doing non-pic code in
3994 shared libraries nor dynamic executables. */
3995 _bfd_error_handler
3996 /* xgettext:c-format */
3997 (_("%pB: non-pic code with imm relocation against dynamic symbol `%s'"),
3998 input_bfd,
3999 h ? h->root.root.string
4000 : bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4001 sym_sec));
4002 ret_val = FALSE;
4003 continue;
4004
4005 default:
4006 break;
4007 }
4008
4009 /* If we don't need dynamic symbol lookup, find a
4010 matching RELATIVE relocation. */
4011 dyn_r_type = r_type;
4012 if (dynamic_symbol_p)
4013 {
4014 dynindx = h->dynindx;
4015 addend = rel->r_addend;
4016 value = 0;
4017 }
4018 else
4019 {
4020 switch (r_type)
4021 {
4022 case R_IA64_DIR32MSB:
4023 dyn_r_type = R_IA64_REL32MSB;
4024 break;
4025 case R_IA64_DIR32LSB:
4026 dyn_r_type = R_IA64_REL32LSB;
4027 break;
4028 case R_IA64_DIR64MSB:
4029 dyn_r_type = R_IA64_REL64MSB;
4030 break;
4031 case R_IA64_DIR64LSB:
4032 dyn_r_type = R_IA64_REL64LSB;
4033 break;
4034
4035 default:
4036 break;
4037 }
4038 dynindx = 0;
4039 addend = value;
4040 }
4041
4042 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section,
4043 srel, rel->r_offset, dyn_r_type,
4044 dynindx, addend);
4045 }
4046 /* Fall through. */
4047
4048 case R_IA64_LTV32MSB:
4049 case R_IA64_LTV32LSB:
4050 case R_IA64_LTV64MSB:
4051 case R_IA64_LTV64LSB:
4052 r = ia64_elf_install_value (hit_addr, value, r_type);
4053 break;
4054
4055 case R_IA64_GPREL22:
4056 case R_IA64_GPREL64I:
4057 case R_IA64_GPREL32MSB:
4058 case R_IA64_GPREL32LSB:
4059 case R_IA64_GPREL64MSB:
4060 case R_IA64_GPREL64LSB:
4061 if (dynamic_symbol_p)
4062 {
4063 _bfd_error_handler
4064 /* xgettext:c-format */
4065 (_("%pB: @gprel relocation against dynamic symbol %s"),
4066 input_bfd,
4067 h ? h->root.root.string
4068 : bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4069 sym_sec));
4070 ret_val = FALSE;
4071 continue;
4072 }
4073 value -= gp_val;
4074 r = ia64_elf_install_value (hit_addr, value, r_type);
4075 break;
4076
4077 case R_IA64_LTOFF22:
4078 case R_IA64_LTOFF22X:
4079 case R_IA64_LTOFF64I:
4080 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE);
4081 value = set_got_entry (input_bfd, info, dyn_i, (h ? h->dynindx : -1),
4082 rel->r_addend, value, R_IA64_DIRNNLSB);
4083 value -= gp_val;
4084 r = ia64_elf_install_value (hit_addr, value, r_type);
4085 break;
4086
4087 case R_IA64_PLTOFF22:
4088 case R_IA64_PLTOFF64I:
4089 case R_IA64_PLTOFF64MSB:
4090 case R_IA64_PLTOFF64LSB:
4091 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE);
4092 value = set_pltoff_entry (output_bfd, info, dyn_i, value, FALSE);
4093 value -= gp_val;
4094 r = ia64_elf_install_value (hit_addr, value, r_type);
4095 break;
4096
4097 case R_IA64_FPTR64I:
4098 case R_IA64_FPTR32MSB:
4099 case R_IA64_FPTR32LSB:
4100 case R_IA64_FPTR64MSB:
4101 case R_IA64_FPTR64LSB:
4102 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE);
4103 if (dyn_i->want_fptr)
4104 {
4105 if (!undef_weak_ref)
4106 value = set_fptr_entry (output_bfd, info, dyn_i, value);
4107 }
4108 if (!dyn_i->want_fptr || bfd_link_pie (info))
4109 {
4110 long dynindx;
4111 unsigned int dyn_r_type = r_type;
4112 bfd_vma addend = rel->r_addend;
4113
4114 /* Otherwise, we expect the dynamic linker to create
4115 the entry. */
4116
4117 if (dyn_i->want_fptr)
4118 {
4119 if (r_type == R_IA64_FPTR64I)
4120 {
4121 /* We can't represent this without a dynamic symbol.
4122 Adjust the relocation to be against an output
4123 section symbol, which are always present in the
4124 dynamic symbol table. */
4125 /* ??? People shouldn't be doing non-pic code in
4126 shared libraries. Hork. */
4127 _bfd_error_handler
4128 (_("%pB: linking non-pic code in a position independent executable"),
4129 input_bfd);
4130 ret_val = FALSE;
4131 continue;
4132 }
4133 dynindx = 0;
4134 addend = value;
4135 dyn_r_type = r_type + R_IA64_RELNNLSB - R_IA64_FPTRNNLSB;
4136 }
4137 else if (h)
4138 {
4139 if (h->dynindx != -1)
4140 dynindx = h->dynindx;
4141 else
4142 dynindx = (_bfd_elf_link_lookup_local_dynindx
4143 (info, h->root.u.def.section->owner,
4144 global_sym_index (h)));
4145 value = 0;
4146 }
4147 else
4148 {
4149 dynindx = (_bfd_elf_link_lookup_local_dynindx
4150 (info, input_bfd, (long) r_symndx));
4151 value = 0;
4152 }
4153
4154 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section,
4155 srel, rel->r_offset, dyn_r_type,
4156 dynindx, addend);
4157 }
4158
4159 r = ia64_elf_install_value (hit_addr, value, r_type);
4160 break;
4161
4162 case R_IA64_LTOFF_FPTR22:
4163 case R_IA64_LTOFF_FPTR64I:
4164 case R_IA64_LTOFF_FPTR32MSB:
4165 case R_IA64_LTOFF_FPTR32LSB:
4166 case R_IA64_LTOFF_FPTR64MSB:
4167 case R_IA64_LTOFF_FPTR64LSB:
4168 {
4169 long dynindx;
4170
4171 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE);
4172 if (dyn_i->want_fptr)
4173 {
4174 BFD_ASSERT (h == NULL || h->dynindx == -1);
4175 if (!undef_weak_ref)
4176 value = set_fptr_entry (output_bfd, info, dyn_i, value);
4177 dynindx = -1;
4178 }
4179 else
4180 {
4181 /* Otherwise, we expect the dynamic linker to create
4182 the entry. */
4183 if (h)
4184 {
4185 if (h->dynindx != -1)
4186 dynindx = h->dynindx;
4187 else
4188 dynindx = (_bfd_elf_link_lookup_local_dynindx
4189 (info, h->root.u.def.section->owner,
4190 global_sym_index (h)));
4191 }
4192 else
4193 dynindx = (_bfd_elf_link_lookup_local_dynindx
4194 (info, input_bfd, (long) r_symndx));
4195 value = 0;
4196 }
4197
4198 value = set_got_entry (output_bfd, info, dyn_i, dynindx,
4199 rel->r_addend, value, R_IA64_FPTRNNLSB);
4200 value -= gp_val;
4201 r = ia64_elf_install_value (hit_addr, value, r_type);
4202 }
4203 break;
4204
4205 case R_IA64_PCREL32MSB:
4206 case R_IA64_PCREL32LSB:
4207 case R_IA64_PCREL64MSB:
4208 case R_IA64_PCREL64LSB:
4209 /* Install a dynamic relocation for this reloc. */
4210 if (dynamic_symbol_p && r_symndx != STN_UNDEF)
4211 {
4212 BFD_ASSERT (srel != NULL);
4213
4214 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section,
4215 srel, rel->r_offset, r_type,
4216 h->dynindx, rel->r_addend);
4217 }
4218 goto finish_pcrel;
4219
4220 case R_IA64_PCREL21B:
4221 case R_IA64_PCREL60B:
4222 /* We should have created a PLT entry for any dynamic symbol. */
4223 dyn_i = NULL;
4224 if (h)
4225 dyn_i = get_dyn_sym_info (ia64_info, h, NULL, NULL, FALSE);
4226
4227 if (dyn_i && dyn_i->want_plt2)
4228 {
4229 /* Should have caught this earlier. */
4230 BFD_ASSERT (rel->r_addend == 0);
4231
4232 value = (ia64_info->root.splt->output_section->vma
4233 + ia64_info->root.splt->output_offset
4234 + dyn_i->plt2_offset);
4235 }
4236 else
4237 {
4238 /* Since there's no PLT entry, Validate that this is
4239 locally defined. */
4240 BFD_ASSERT (undef_weak_ref || sym_sec->output_section != NULL);
4241
4242 /* If the symbol is undef_weak, we shouldn't be trying
4243 to call it. There's every chance that we'd wind up
4244 with an out-of-range fixup here. Don't bother setting
4245 any value at all. */
4246 if (undef_weak_ref)
4247 continue;
4248 }
4249 goto finish_pcrel;
4250
4251 case R_IA64_PCREL21BI:
4252 case R_IA64_PCREL21F:
4253 case R_IA64_PCREL21M:
4254 case R_IA64_PCREL22:
4255 case R_IA64_PCREL64I:
4256 /* The PCREL21BI reloc is specifically not intended for use with
4257 dynamic relocs. PCREL21F and PCREL21M are used for speculation
4258 fixup code, and thus probably ought not be dynamic. The
4259 PCREL22 and PCREL64I relocs aren't emitted as dynamic relocs. */
4260 if (dynamic_symbol_p)
4261 {
4262 const char *msg;
4263
4264 if (r_type == R_IA64_PCREL21BI)
4265 /* xgettext:c-format */
4266 msg = _("%pB: @internal branch to dynamic symbol %s");
4267 else if (r_type == R_IA64_PCREL21F || r_type == R_IA64_PCREL21M)
4268 /* xgettext:c-format */
4269 msg = _("%pB: speculation fixup to dynamic symbol %s");
4270 else
4271 /* xgettext:c-format */
4272 msg = _("%pB: @pcrel relocation against dynamic symbol %s");
4273 _bfd_error_handler (msg, input_bfd,
4274 h ? h->root.root.string
4275 : bfd_elf_sym_name (input_bfd,
4276 symtab_hdr,
4277 sym,
4278 sym_sec));
4279 ret_val = FALSE;
4280 continue;
4281 }
4282 goto finish_pcrel;
4283
4284 finish_pcrel:
4285 /* Make pc-relative. */
4286 value -= (input_section->output_section->vma
4287 + input_section->output_offset
4288 + rel->r_offset) & ~ (bfd_vma) 0x3;
4289 r = ia64_elf_install_value (hit_addr, value, r_type);
4290 break;
4291
4292 case R_IA64_SEGREL32MSB:
4293 case R_IA64_SEGREL32LSB:
4294 case R_IA64_SEGREL64MSB:
4295 case R_IA64_SEGREL64LSB:
4296 {
4297 /* Find the segment that contains the output_section. */
4298 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section
4299 (output_bfd, input_section->output_section);
4300
4301 if (p == NULL)
4302 {
4303 r = bfd_reloc_notsupported;
4304 }
4305 else
4306 {
4307 /* The VMA of the segment is the vaddr of the associated
4308 program header. */
4309 if (value > p->p_vaddr)
4310 value -= p->p_vaddr;
4311 else
4312 value = 0;
4313 r = ia64_elf_install_value (hit_addr, value, r_type);
4314 }
4315 break;
4316 }
4317
4318 case R_IA64_SECREL32MSB:
4319 case R_IA64_SECREL32LSB:
4320 case R_IA64_SECREL64MSB:
4321 case R_IA64_SECREL64LSB:
4322 /* Make output-section relative to section where the symbol
4323 is defined. PR 475 */
4324 if (sym_sec)
4325 value -= sym_sec->output_section->vma;
4326 r = ia64_elf_install_value (hit_addr, value, r_type);
4327 break;
4328
4329 case R_IA64_IPLTMSB:
4330 case R_IA64_IPLTLSB:
4331 /* Install a dynamic relocation for this reloc. */
4332 if ((dynamic_symbol_p || bfd_link_pic (info))
4333 && (input_section->flags & SEC_ALLOC) != 0)
4334 {
4335 BFD_ASSERT (srel != NULL);
4336
4337 /* If we don't need dynamic symbol lookup, install two
4338 RELATIVE relocations. */
4339 if (!dynamic_symbol_p)
4340 {
4341 unsigned int dyn_r_type;
4342
4343 if (r_type == R_IA64_IPLTMSB)
4344 dyn_r_type = R_IA64_REL64MSB;
4345 else
4346 dyn_r_type = R_IA64_REL64LSB;
4347
4348 elfNN_ia64_install_dyn_reloc (output_bfd, info,
4349 input_section,
4350 srel, rel->r_offset,
4351 dyn_r_type, 0, value);
4352 elfNN_ia64_install_dyn_reloc (output_bfd, info,
4353 input_section,
4354 srel, rel->r_offset + 8,
4355 dyn_r_type, 0, gp_val);
4356 }
4357 else
4358 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section,
4359 srel, rel->r_offset, r_type,
4360 h->dynindx, rel->r_addend);
4361 }
4362
4363 if (r_type == R_IA64_IPLTMSB)
4364 r_type = R_IA64_DIR64MSB;
4365 else
4366 r_type = R_IA64_DIR64LSB;
4367 ia64_elf_install_value (hit_addr, value, r_type);
4368 r = ia64_elf_install_value (hit_addr + 8, gp_val, r_type);
4369 break;
4370
4371 case R_IA64_TPREL14:
4372 case R_IA64_TPREL22:
4373 case R_IA64_TPREL64I:
4374 if (elf_hash_table (info)->tls_sec == NULL)
4375 goto missing_tls_sec;
4376 value -= elfNN_ia64_tprel_base (info);
4377 r = ia64_elf_install_value (hit_addr, value, r_type);
4378 break;
4379
4380 case R_IA64_DTPREL14:
4381 case R_IA64_DTPREL22:
4382 case R_IA64_DTPREL64I:
4383 case R_IA64_DTPREL32LSB:
4384 case R_IA64_DTPREL32MSB:
4385 case R_IA64_DTPREL64LSB:
4386 case R_IA64_DTPREL64MSB:
4387 if (elf_hash_table (info)->tls_sec == NULL)
4388 goto missing_tls_sec;
4389 value -= elfNN_ia64_dtprel_base (info);
4390 r = ia64_elf_install_value (hit_addr, value, r_type);
4391 break;
4392
4393 case R_IA64_LTOFF_TPREL22:
4394 case R_IA64_LTOFF_DTPMOD22:
4395 case R_IA64_LTOFF_DTPREL22:
4396 {
4397 int got_r_type;
4398 long dynindx = h ? h->dynindx : -1;
4399 bfd_vma r_addend = rel->r_addend;
4400
4401 switch (r_type)
4402 {
4403 default:
4404 case R_IA64_LTOFF_TPREL22:
4405 if (!dynamic_symbol_p)
4406 {
4407 if (elf_hash_table (info)->tls_sec == NULL)
4408 goto missing_tls_sec;
4409 if (!bfd_link_pic (info))
4410 value -= elfNN_ia64_tprel_base (info);
4411 else
4412 {
4413 r_addend += value - elfNN_ia64_dtprel_base (info);
4414 dynindx = 0;
4415 }
4416 }
4417 got_r_type = R_IA64_TPREL64LSB;
4418 break;
4419 case R_IA64_LTOFF_DTPMOD22:
4420 if (!dynamic_symbol_p && !bfd_link_pic (info))
4421 value = 1;
4422 got_r_type = R_IA64_DTPMOD64LSB;
4423 break;
4424 case R_IA64_LTOFF_DTPREL22:
4425 if (!dynamic_symbol_p)
4426 {
4427 if (elf_hash_table (info)->tls_sec == NULL)
4428 goto missing_tls_sec;
4429 value -= elfNN_ia64_dtprel_base (info);
4430 }
4431 got_r_type = R_IA64_DTPRELNNLSB;
4432 break;
4433 }
4434 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE);
4435 value = set_got_entry (input_bfd, info, dyn_i, dynindx, r_addend,
4436 value, got_r_type);
4437 value -= gp_val;
4438 r = ia64_elf_install_value (hit_addr, value, r_type);
4439 }
4440 break;
4441
4442 default:
4443 r = bfd_reloc_notsupported;
4444 break;
4445 }
4446
4447 switch (r)
4448 {
4449 case bfd_reloc_ok:
4450 break;
4451
4452 case bfd_reloc_undefined:
4453 /* This can happen for global table relative relocs if
4454 __gp is undefined. This is a panic situation so we
4455 don't try to continue. */
4456 (*info->callbacks->undefined_symbol)
4457 (info, "__gp", input_bfd, input_section, rel->r_offset, 1);
4458 return FALSE;
4459
4460 case bfd_reloc_notsupported:
4461 {
4462 const char *name;
4463
4464 if (h)
4465 name = h->root.root.string;
4466 else
4467 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4468 sym_sec);
4469 (*info->callbacks->warning) (info, _("unsupported reloc"),
4470 name, input_bfd,
4471 input_section, rel->r_offset);
4472 ret_val = FALSE;
4473 }
4474 break;
4475
4476 case bfd_reloc_dangerous:
4477 case bfd_reloc_outofrange:
4478 case bfd_reloc_overflow:
4479 default:
4480 missing_tls_sec:
4481 {
4482 const char *name;
4483
4484 if (h)
4485 name = h->root.root.string;
4486 else
4487 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4488 sym_sec);
4489
4490 switch (r_type)
4491 {
4492 case R_IA64_TPREL14:
4493 case R_IA64_TPREL22:
4494 case R_IA64_TPREL64I:
4495 case R_IA64_DTPREL14:
4496 case R_IA64_DTPREL22:
4497 case R_IA64_DTPREL64I:
4498 case R_IA64_DTPREL32LSB:
4499 case R_IA64_DTPREL32MSB:
4500 case R_IA64_DTPREL64LSB:
4501 case R_IA64_DTPREL64MSB:
4502 case R_IA64_LTOFF_TPREL22:
4503 case R_IA64_LTOFF_DTPMOD22:
4504 case R_IA64_LTOFF_DTPREL22:
4505 _bfd_error_handler
4506 /* xgettext:c-format */
4507 (_("%pB: missing TLS section for relocation %s against `%s'"
4508 " at %#" PRIx64 " in section `%pA'."),
4509 input_bfd, howto->name, name,
4510 (uint64_t) rel->r_offset, input_section);
4511 break;
4512
4513 case R_IA64_PCREL21B:
4514 case R_IA64_PCREL21BI:
4515 case R_IA64_PCREL21M:
4516 case R_IA64_PCREL21F:
4517 if (is_elf_hash_table (info->hash))
4518 {
4519 /* Relaxtion is always performed for ELF output.
4520 Overflow failures for those relocations mean
4521 that the section is too big to relax. */
4522 _bfd_error_handler
4523 /* xgettext:c-format */
4524 (_("%pB: Can't relax br (%s) to `%s' at %#" PRIx64
4525 " in section `%pA' with size %#" PRIx64
4526 " (> 0x1000000)."),
4527 input_bfd, howto->name, name, (uint64_t) rel->r_offset,
4528 input_section, (uint64_t) input_section->size);
4529 break;
4530 }
4531 /* Fall through. */
4532 default:
4533 (*info->callbacks->reloc_overflow) (info,
4534 &h->root,
4535 name,
4536 howto->name,
4537 (bfd_vma) 0,
4538 input_bfd,
4539 input_section,
4540 rel->r_offset);
4541 break;
4542 }
4543
4544 ret_val = FALSE;
4545 }
4546 break;
4547 }
4548 }
4549
4550 return ret_val;
4551 }
4552
4553 static bfd_boolean
4554 elfNN_ia64_finish_dynamic_symbol (bfd *output_bfd,
4555 struct bfd_link_info *info,
4556 struct elf_link_hash_entry *h,
4557 Elf_Internal_Sym *sym)
4558 {
4559 struct elfNN_ia64_link_hash_table *ia64_info;
4560 struct elfNN_ia64_dyn_sym_info *dyn_i;
4561
4562 ia64_info = elfNN_ia64_hash_table (info);
4563 if (ia64_info == NULL)
4564 return FALSE;
4565
4566 dyn_i = get_dyn_sym_info (ia64_info, h, NULL, NULL, FALSE);
4567
4568 /* Fill in the PLT data, if required. */
4569 if (dyn_i && dyn_i->want_plt)
4570 {
4571 Elf_Internal_Rela outrel;
4572 bfd_byte *loc;
4573 asection *plt_sec;
4574 bfd_vma plt_addr, pltoff_addr, gp_val, plt_index;
4575
4576 gp_val = _bfd_get_gp_value (output_bfd);
4577
4578 /* Initialize the minimal PLT entry. */
4579
4580 plt_index = (dyn_i->plt_offset - PLT_HEADER_SIZE) / PLT_MIN_ENTRY_SIZE;
4581 plt_sec = ia64_info->root.splt;
4582 loc = plt_sec->contents + dyn_i->plt_offset;
4583
4584 memcpy (loc, plt_min_entry, PLT_MIN_ENTRY_SIZE);
4585 ia64_elf_install_value (loc, plt_index, R_IA64_IMM22);
4586 ia64_elf_install_value (loc+2, -dyn_i->plt_offset, R_IA64_PCREL21B);
4587
4588 plt_addr = (plt_sec->output_section->vma
4589 + plt_sec->output_offset
4590 + dyn_i->plt_offset);
4591 pltoff_addr = set_pltoff_entry (output_bfd, info, dyn_i, plt_addr, TRUE);
4592
4593 /* Initialize the FULL PLT entry, if needed. */
4594 if (dyn_i->want_plt2)
4595 {
4596 loc = plt_sec->contents + dyn_i->plt2_offset;
4597
4598 memcpy (loc, plt_full_entry, PLT_FULL_ENTRY_SIZE);
4599 ia64_elf_install_value (loc, pltoff_addr - gp_val, R_IA64_IMM22);
4600
4601 /* Mark the symbol as undefined, rather than as defined in the
4602 plt section. Leave the value alone. */
4603 /* ??? We didn't redefine it in adjust_dynamic_symbol in the
4604 first place. But perhaps elflink.c did some for us. */
4605 if (!h->def_regular)
4606 sym->st_shndx = SHN_UNDEF;
4607 }
4608
4609 /* Create the dynamic relocation. */
4610 outrel.r_offset = pltoff_addr;
4611 if (bfd_little_endian (output_bfd))
4612 outrel.r_info = ELFNN_R_INFO (h->dynindx, R_IA64_IPLTLSB);
4613 else
4614 outrel.r_info = ELFNN_R_INFO (h->dynindx, R_IA64_IPLTMSB);
4615 outrel.r_addend = 0;
4616
4617 /* This is fun. In the .IA_64.pltoff section, we've got entries
4618 that correspond both to real PLT entries, and those that
4619 happened to resolve to local symbols but need to be created
4620 to satisfy @pltoff relocations. The .rela.IA_64.pltoff
4621 relocations for the real PLT should come at the end of the
4622 section, so that they can be indexed by plt entry at runtime.
4623
4624 We emitted all of the relocations for the non-PLT @pltoff
4625 entries during relocate_section. So we can consider the
4626 existing sec->reloc_count to be the base of the array of
4627 PLT relocations. */
4628
4629 loc = ia64_info->rel_pltoff_sec->contents;
4630 loc += ((ia64_info->rel_pltoff_sec->reloc_count + plt_index)
4631 * sizeof (ElfNN_External_Rela));
4632 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
4633 }
4634
4635 /* Mark some specially defined symbols as absolute. */
4636 if (h == ia64_info->root.hdynamic
4637 || h == ia64_info->root.hgot
4638 || h == ia64_info->root.hplt)
4639 sym->st_shndx = SHN_ABS;
4640
4641 return TRUE;
4642 }
4643
4644 static bfd_boolean
4645 elfNN_ia64_finish_dynamic_sections (bfd *abfd,
4646 struct bfd_link_info *info)
4647 {
4648 struct elfNN_ia64_link_hash_table *ia64_info;
4649 bfd *dynobj;
4650
4651 ia64_info = elfNN_ia64_hash_table (info);
4652 if (ia64_info == NULL)
4653 return FALSE;
4654
4655 dynobj = ia64_info->root.dynobj;
4656
4657 if (ia64_info->root.dynamic_sections_created)
4658 {
4659 ElfNN_External_Dyn *dyncon, *dynconend;
4660 asection *sdyn, *sgotplt;
4661 bfd_vma gp_val;
4662
4663 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4664 sgotplt = ia64_info->root.sgotplt;
4665 BFD_ASSERT (sdyn != NULL);
4666 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
4667 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
4668
4669 gp_val = _bfd_get_gp_value (abfd);
4670
4671 for (; dyncon < dynconend; dyncon++)
4672 {
4673 Elf_Internal_Dyn dyn;
4674
4675 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
4676
4677 switch (dyn.d_tag)
4678 {
4679 case DT_PLTGOT:
4680 dyn.d_un.d_ptr = gp_val;
4681 break;
4682
4683 case DT_PLTRELSZ:
4684 dyn.d_un.d_val = (ia64_info->minplt_entries
4685 * sizeof (ElfNN_External_Rela));
4686 break;
4687
4688 case DT_JMPREL:
4689 /* See the comment above in finish_dynamic_symbol. */
4690 dyn.d_un.d_ptr = (ia64_info->rel_pltoff_sec->output_section->vma
4691 + ia64_info->rel_pltoff_sec->output_offset
4692 + (ia64_info->rel_pltoff_sec->reloc_count
4693 * sizeof (ElfNN_External_Rela)));
4694 break;
4695
4696 case DT_IA_64_PLT_RESERVE:
4697 dyn.d_un.d_ptr = (sgotplt->output_section->vma
4698 + sgotplt->output_offset);
4699 break;
4700 }
4701
4702 bfd_elfNN_swap_dyn_out (abfd, &dyn, dyncon);
4703 }
4704
4705 /* Initialize the PLT0 entry. */
4706 if (ia64_info->root.splt)
4707 {
4708 bfd_byte *loc = ia64_info->root.splt->contents;
4709 bfd_vma pltres;
4710
4711 memcpy (loc, plt_header, PLT_HEADER_SIZE);
4712
4713 pltres = (sgotplt->output_section->vma
4714 + sgotplt->output_offset
4715 - gp_val);
4716
4717 ia64_elf_install_value (loc+1, pltres, R_IA64_GPREL22);
4718 }
4719 }
4720
4721 return TRUE;
4722 }
4723 \f
4724 /* ELF file flag handling: */
4725
4726 /* Function to keep IA-64 specific file flags. */
4727 static bfd_boolean
4728 elfNN_ia64_set_private_flags (bfd *abfd, flagword flags)
4729 {
4730 BFD_ASSERT (!elf_flags_init (abfd)
4731 || elf_elfheader (abfd)->e_flags == flags);
4732
4733 elf_elfheader (abfd)->e_flags = flags;
4734 elf_flags_init (abfd) = TRUE;
4735 return TRUE;
4736 }
4737
4738 /* Merge backend specific data from an object file to the output
4739 object file when linking. */
4740 static bfd_boolean
4741 elfNN_ia64_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4742 {
4743 bfd *obfd = info->output_bfd;
4744 flagword out_flags;
4745 flagword in_flags;
4746 bfd_boolean ok = TRUE;
4747
4748 /* Don't even pretend to support mixed-format linking. */
4749 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4750 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4751 return FALSE;
4752
4753 in_flags = elf_elfheader (ibfd)->e_flags;
4754 out_flags = elf_elfheader (obfd)->e_flags;
4755
4756 if (! elf_flags_init (obfd))
4757 {
4758 elf_flags_init (obfd) = TRUE;
4759 elf_elfheader (obfd)->e_flags = in_flags;
4760
4761 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
4762 && bfd_get_arch_info (obfd)->the_default)
4763 {
4764 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
4765 bfd_get_mach (ibfd));
4766 }
4767
4768 return TRUE;
4769 }
4770
4771 /* Check flag compatibility. */
4772 if (in_flags == out_flags)
4773 return TRUE;
4774
4775 /* Output has EF_IA_64_REDUCEDFP set only if all inputs have it set. */
4776 if (!(in_flags & EF_IA_64_REDUCEDFP) && (out_flags & EF_IA_64_REDUCEDFP))
4777 elf_elfheader (obfd)->e_flags &= ~EF_IA_64_REDUCEDFP;
4778
4779 if ((in_flags & EF_IA_64_TRAPNIL) != (out_flags & EF_IA_64_TRAPNIL))
4780 {
4781 _bfd_error_handler
4782 (_("%pB: linking trap-on-NULL-dereference with non-trapping files"),
4783 ibfd);
4784
4785 bfd_set_error (bfd_error_bad_value);
4786 ok = FALSE;
4787 }
4788 if ((in_flags & EF_IA_64_BE) != (out_flags & EF_IA_64_BE))
4789 {
4790 _bfd_error_handler
4791 (_("%pB: linking big-endian files with little-endian files"),
4792 ibfd);
4793
4794 bfd_set_error (bfd_error_bad_value);
4795 ok = FALSE;
4796 }
4797 if ((in_flags & EF_IA_64_ABI64) != (out_flags & EF_IA_64_ABI64))
4798 {
4799 _bfd_error_handler
4800 (_("%pB: linking 64-bit files with 32-bit files"),
4801 ibfd);
4802
4803 bfd_set_error (bfd_error_bad_value);
4804 ok = FALSE;
4805 }
4806 if ((in_flags & EF_IA_64_CONS_GP) != (out_flags & EF_IA_64_CONS_GP))
4807 {
4808 _bfd_error_handler
4809 (_("%pB: linking constant-gp files with non-constant-gp files"),
4810 ibfd);
4811
4812 bfd_set_error (bfd_error_bad_value);
4813 ok = FALSE;
4814 }
4815 if ((in_flags & EF_IA_64_NOFUNCDESC_CONS_GP)
4816 != (out_flags & EF_IA_64_NOFUNCDESC_CONS_GP))
4817 {
4818 _bfd_error_handler
4819 (_("%pB: linking auto-pic files with non-auto-pic files"),
4820 ibfd);
4821
4822 bfd_set_error (bfd_error_bad_value);
4823 ok = FALSE;
4824 }
4825
4826 return ok;
4827 }
4828
4829 static bfd_boolean
4830 elfNN_ia64_print_private_bfd_data (bfd *abfd, void * ptr)
4831 {
4832 FILE *file = (FILE *) ptr;
4833 flagword flags = elf_elfheader (abfd)->e_flags;
4834
4835 BFD_ASSERT (abfd != NULL && ptr != NULL);
4836
4837 fprintf (file, "private flags = %s%s%s%s%s%s%s%s\n",
4838 (flags & EF_IA_64_TRAPNIL) ? "TRAPNIL, " : "",
4839 (flags & EF_IA_64_EXT) ? "EXT, " : "",
4840 (flags & EF_IA_64_BE) ? "BE, " : "LE, ",
4841 (flags & EF_IA_64_REDUCEDFP) ? "REDUCEDFP, " : "",
4842 (flags & EF_IA_64_CONS_GP) ? "CONS_GP, " : "",
4843 (flags & EF_IA_64_NOFUNCDESC_CONS_GP) ? "NOFUNCDESC_CONS_GP, " : "",
4844 (flags & EF_IA_64_ABSOLUTE) ? "ABSOLUTE, " : "",
4845 (flags & EF_IA_64_ABI64) ? "ABI64" : "ABI32");
4846
4847 _bfd_elf_print_private_bfd_data (abfd, ptr);
4848 return TRUE;
4849 }
4850
4851 static enum elf_reloc_type_class
4852 elfNN_ia64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4853 const asection *rel_sec ATTRIBUTE_UNUSED,
4854 const Elf_Internal_Rela *rela)
4855 {
4856 switch ((int) ELFNN_R_TYPE (rela->r_info))
4857 {
4858 case R_IA64_REL32MSB:
4859 case R_IA64_REL32LSB:
4860 case R_IA64_REL64MSB:
4861 case R_IA64_REL64LSB:
4862 return reloc_class_relative;
4863 case R_IA64_IPLTMSB:
4864 case R_IA64_IPLTLSB:
4865 return reloc_class_plt;
4866 case R_IA64_COPY:
4867 return reloc_class_copy;
4868 default:
4869 return reloc_class_normal;
4870 }
4871 }
4872
4873 static const struct bfd_elf_special_section elfNN_ia64_special_sections[] =
4874 {
4875 { STRING_COMMA_LEN (".sbss"), -1, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT },
4876 { STRING_COMMA_LEN (".sdata"), -1, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT },
4877 { NULL, 0, 0, 0, 0 }
4878 };
4879
4880 static bfd_boolean
4881 elfNN_ia64_object_p (bfd *abfd)
4882 {
4883 asection *sec;
4884 asection *group, *unwi, *unw;
4885 flagword flags;
4886 const char *name;
4887 char *unwi_name, *unw_name;
4888 bfd_size_type amt;
4889
4890 if (abfd->flags & DYNAMIC)
4891 return TRUE;
4892
4893 /* Flags for fake group section. */
4894 flags = (SEC_LINKER_CREATED | SEC_GROUP | SEC_LINK_ONCE
4895 | SEC_EXCLUDE);
4896
4897 /* We add a fake section group for each .gnu.linkonce.t.* section,
4898 which isn't in a section group, and its unwind sections. */
4899 for (sec = abfd->sections; sec != NULL; sec = sec->next)
4900 {
4901 if (elf_sec_group (sec) == NULL
4902 && ((sec->flags & (SEC_LINK_ONCE | SEC_CODE | SEC_GROUP))
4903 == (SEC_LINK_ONCE | SEC_CODE))
4904 && CONST_STRNEQ (sec->name, ".gnu.linkonce.t."))
4905 {
4906 name = sec->name + 16;
4907
4908 amt = strlen (name) + sizeof (".gnu.linkonce.ia64unwi.");
4909 unwi_name = bfd_alloc (abfd, amt);
4910 if (!unwi_name)
4911 return FALSE;
4912
4913 strcpy (stpcpy (unwi_name, ".gnu.linkonce.ia64unwi."), name);
4914 unwi = bfd_get_section_by_name (abfd, unwi_name);
4915
4916 amt = strlen (name) + sizeof (".gnu.linkonce.ia64unw.");
4917 unw_name = bfd_alloc (abfd, amt);
4918 if (!unw_name)
4919 return FALSE;
4920
4921 strcpy (stpcpy (unw_name, ".gnu.linkonce.ia64unw."), name);
4922 unw = bfd_get_section_by_name (abfd, unw_name);
4923
4924 /* We need to create a fake group section for it and its
4925 unwind sections. */
4926 group = bfd_make_section_anyway_with_flags (abfd, name,
4927 flags);
4928 if (group == NULL)
4929 return FALSE;
4930
4931 /* Move the fake group section to the beginning. */
4932 bfd_section_list_remove (abfd, group);
4933 bfd_section_list_prepend (abfd, group);
4934
4935 elf_next_in_group (group) = sec;
4936
4937 elf_group_name (sec) = name;
4938 elf_next_in_group (sec) = sec;
4939 elf_sec_group (sec) = group;
4940
4941 if (unwi)
4942 {
4943 elf_group_name (unwi) = name;
4944 elf_next_in_group (unwi) = sec;
4945 elf_next_in_group (sec) = unwi;
4946 elf_sec_group (unwi) = group;
4947 }
4948
4949 if (unw)
4950 {
4951 elf_group_name (unw) = name;
4952 if (unwi)
4953 {
4954 elf_next_in_group (unw) = elf_next_in_group (unwi);
4955 elf_next_in_group (unwi) = unw;
4956 }
4957 else
4958 {
4959 elf_next_in_group (unw) = sec;
4960 elf_next_in_group (sec) = unw;
4961 }
4962 elf_sec_group (unw) = group;
4963 }
4964
4965 /* Fake SHT_GROUP section header. */
4966 elf_section_data (group)->this_hdr.bfd_section = group;
4967 elf_section_data (group)->this_hdr.sh_type = SHT_GROUP;
4968 }
4969 }
4970 return TRUE;
4971 }
4972
4973 static bfd_boolean
4974 elfNN_ia64_hpux_vec (const bfd_target *vec)
4975 {
4976 extern const bfd_target ia64_elfNN_hpux_be_vec;
4977 return (vec == &ia64_elfNN_hpux_be_vec);
4978 }
4979
4980 static void
4981 elfNN_hpux_post_process_headers (bfd *abfd,
4982 struct bfd_link_info *info ATTRIBUTE_UNUSED)
4983 {
4984 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4985
4986 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
4987 i_ehdrp->e_ident[EI_ABIVERSION] = 1;
4988 }
4989
4990 static bfd_boolean
4991 elfNN_hpux_backend_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
4992 asection *sec, int *retval)
4993 {
4994 if (bfd_is_com_section (sec))
4995 {
4996 *retval = SHN_IA_64_ANSI_COMMON;
4997 return TRUE;
4998 }
4999 return FALSE;
5000 }
5001
5002 static void
5003 elfNN_hpux_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5004 asymbol *asym)
5005 {
5006 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5007
5008 switch (elfsym->internal_elf_sym.st_shndx)
5009 {
5010 case SHN_IA_64_ANSI_COMMON:
5011 asym->section = bfd_com_section_ptr;
5012 asym->value = elfsym->internal_elf_sym.st_size;
5013 asym->flags &= ~BSF_GLOBAL;
5014 break;
5015 }
5016 }
5017 \f
5018 #define TARGET_LITTLE_SYM ia64_elfNN_le_vec
5019 #define TARGET_LITTLE_NAME "elfNN-ia64-little"
5020 #define TARGET_BIG_SYM ia64_elfNN_be_vec
5021 #define TARGET_BIG_NAME "elfNN-ia64-big"
5022 #define ELF_ARCH bfd_arch_ia64
5023 #define ELF_TARGET_ID IA64_ELF_DATA
5024 #define ELF_MACHINE_CODE EM_IA_64
5025 #define ELF_MACHINE_ALT1 1999 /* EAS2.3 */
5026 #define ELF_MACHINE_ALT2 1998 /* EAS2.2 */
5027 #define ELF_MAXPAGESIZE 0x10000 /* 64KB */
5028 #define ELF_COMMONPAGESIZE 0x4000 /* 16KB */
5029
5030 #define elf_backend_section_from_shdr \
5031 elfNN_ia64_section_from_shdr
5032 #define elf_backend_section_flags \
5033 elfNN_ia64_section_flags
5034 #define elf_backend_fake_sections \
5035 elfNN_ia64_fake_sections
5036 #define elf_backend_final_write_processing \
5037 elfNN_ia64_final_write_processing
5038 #define elf_backend_add_symbol_hook \
5039 elfNN_ia64_add_symbol_hook
5040 #define elf_backend_additional_program_headers \
5041 elfNN_ia64_additional_program_headers
5042 #define elf_backend_modify_segment_map \
5043 elfNN_ia64_modify_segment_map
5044 #define elf_backend_modify_program_headers \
5045 elfNN_ia64_modify_program_headers
5046 #define elf_info_to_howto \
5047 elfNN_ia64_info_to_howto
5048
5049 #define bfd_elfNN_bfd_reloc_type_lookup \
5050 ia64_elf_reloc_type_lookup
5051 #define bfd_elfNN_bfd_reloc_name_lookup \
5052 ia64_elf_reloc_name_lookup
5053 #define bfd_elfNN_bfd_is_local_label_name \
5054 elfNN_ia64_is_local_label_name
5055 #define bfd_elfNN_bfd_relax_section \
5056 elfNN_ia64_relax_section
5057
5058 #define elf_backend_object_p \
5059 elfNN_ia64_object_p
5060
5061 /* Stuff for the BFD linker: */
5062 #define bfd_elfNN_bfd_link_hash_table_create \
5063 elfNN_ia64_hash_table_create
5064 #define elf_backend_create_dynamic_sections \
5065 elfNN_ia64_create_dynamic_sections
5066 #define elf_backend_check_relocs \
5067 elfNN_ia64_check_relocs
5068 #define elf_backend_adjust_dynamic_symbol \
5069 elfNN_ia64_adjust_dynamic_symbol
5070 #define elf_backend_size_dynamic_sections \
5071 elfNN_ia64_size_dynamic_sections
5072 #define elf_backend_omit_section_dynsym \
5073 _bfd_elf_omit_section_dynsym_all
5074 #define elf_backend_relocate_section \
5075 elfNN_ia64_relocate_section
5076 #define elf_backend_finish_dynamic_symbol \
5077 elfNN_ia64_finish_dynamic_symbol
5078 #define elf_backend_finish_dynamic_sections \
5079 elfNN_ia64_finish_dynamic_sections
5080 #define bfd_elfNN_bfd_final_link \
5081 elfNN_ia64_final_link
5082
5083 #define bfd_elfNN_bfd_merge_private_bfd_data \
5084 elfNN_ia64_merge_private_bfd_data
5085 #define bfd_elfNN_bfd_set_private_flags \
5086 elfNN_ia64_set_private_flags
5087 #define bfd_elfNN_bfd_print_private_bfd_data \
5088 elfNN_ia64_print_private_bfd_data
5089
5090 #define elf_backend_plt_readonly 1
5091 #define elf_backend_can_gc_sections 1
5092 #define elf_backend_want_plt_sym 0
5093 #define elf_backend_plt_alignment 5
5094 #define elf_backend_got_header_size 0
5095 #define elf_backend_want_got_plt 1
5096 #define elf_backend_may_use_rel_p 1
5097 #define elf_backend_may_use_rela_p 1
5098 #define elf_backend_default_use_rela_p 1
5099 #define elf_backend_want_dynbss 0
5100 #define elf_backend_copy_indirect_symbol elfNN_ia64_hash_copy_indirect
5101 #define elf_backend_hide_symbol elfNN_ia64_hash_hide_symbol
5102 #define elf_backend_fixup_symbol _bfd_elf_link_hash_fixup_symbol
5103 #define elf_backend_reloc_type_class elfNN_ia64_reloc_type_class
5104 #define elf_backend_rela_normal 1
5105 #define elf_backend_dtrel_excludes_plt 1
5106 #define elf_backend_special_sections elfNN_ia64_special_sections
5107 #define elf_backend_default_execstack 0
5108
5109 /* FIXME: PR 290: The Intel C compiler generates SHT_IA_64_UNWIND with
5110 SHF_LINK_ORDER. But it doesn't set the sh_link or sh_info fields.
5111 We don't want to flood users with so many error messages. We turn
5112 off the warning for now. It will be turned on later when the Intel
5113 compiler is fixed. */
5114 #define elf_backend_link_order_error_handler NULL
5115
5116 #include "elfNN-target.h"
5117
5118 /* HPUX-specific vectors. */
5119
5120 #undef TARGET_LITTLE_SYM
5121 #undef TARGET_LITTLE_NAME
5122 #undef TARGET_BIG_SYM
5123 #define TARGET_BIG_SYM ia64_elfNN_hpux_be_vec
5124 #undef TARGET_BIG_NAME
5125 #define TARGET_BIG_NAME "elfNN-ia64-hpux-big"
5126
5127 /* These are HP-UX specific functions. */
5128
5129 #undef elf_backend_post_process_headers
5130 #define elf_backend_post_process_headers elfNN_hpux_post_process_headers
5131
5132 #undef elf_backend_section_from_bfd_section
5133 #define elf_backend_section_from_bfd_section elfNN_hpux_backend_section_from_bfd_section
5134
5135 #undef elf_backend_symbol_processing
5136 #define elf_backend_symbol_processing elfNN_hpux_backend_symbol_processing
5137
5138 #undef elf_backend_want_p_paddr_set_to_zero
5139 #define elf_backend_want_p_paddr_set_to_zero 1
5140
5141 #undef ELF_COMMONPAGESIZE
5142 #undef ELF_OSABI
5143 #define ELF_OSABI ELFOSABI_HPUX
5144
5145 #undef elfNN_bed
5146 #define elfNN_bed elfNN_ia64_hpux_bed
5147
5148 #include "elfNN-target.h"