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