[PATCH 3/57][Arm][GAS] Add support for MVE instructions: vabs and vneg
[binutils-gdb.git] / bfd / elfnn-ia64.c
bloba80e5b8e2fd8567cdcf791a2435b5ad164182078
1 /* IA-64 support for 64-bit ELF
2 Copyright (C) 1998-2019 Free Software Foundation, Inc.
3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
5 This file is part of BFD, the Binary File Descriptor library.
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.
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.
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. */
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 "elfxx-ia64.h"
32 #define ARCH_SIZE NN
34 #if ARCH_SIZE == 64
35 #define LOG_SECTION_ALIGN 3
36 #endif
38 #if ARCH_SIZE == 32
39 #define LOG_SECTION_ALIGN 2
40 #endif
42 typedef struct bfd_hash_entry *(*new_hash_entry_func)
43 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
45 /* In dynamically (linker-) created sections, we generally need to keep track
46 of the place a symbol or expression got allocated to. This is done via hash
47 tables that store entries of the following type. */
49 struct elfNN_ia64_dyn_sym_info
51 /* The addend for which this entry is relevant. */
52 bfd_vma addend;
54 bfd_vma got_offset;
55 bfd_vma fptr_offset;
56 bfd_vma pltoff_offset;
57 bfd_vma plt_offset;
58 bfd_vma plt2_offset;
59 bfd_vma tprel_offset;
60 bfd_vma dtpmod_offset;
61 bfd_vma dtprel_offset;
63 /* The symbol table entry, if any, that this was derived from. */
64 struct elf_link_hash_entry *h;
66 /* Used to count non-got, non-plt relocations for delayed sizing
67 of relocation sections. */
68 struct elfNN_ia64_dyn_reloc_entry
70 struct elfNN_ia64_dyn_reloc_entry *next;
71 asection *srel;
72 int type;
73 int count;
75 /* Is this reloc against readonly section? */
76 bfd_boolean reltext;
77 } *reloc_entries;
79 /* TRUE when the section contents have been updated. */
80 unsigned got_done : 1;
81 unsigned fptr_done : 1;
82 unsigned pltoff_done : 1;
83 unsigned tprel_done : 1;
84 unsigned dtpmod_done : 1;
85 unsigned dtprel_done : 1;
87 /* TRUE for the different kinds of linker data we want created. */
88 unsigned want_got : 1;
89 unsigned want_gotx : 1;
90 unsigned want_fptr : 1;
91 unsigned want_ltoff_fptr : 1;
92 unsigned want_plt : 1;
93 unsigned want_plt2 : 1;
94 unsigned want_pltoff : 1;
95 unsigned want_tprel : 1;
96 unsigned want_dtpmod : 1;
97 unsigned want_dtprel : 1;
100 struct elfNN_ia64_local_hash_entry
102 int id;
103 unsigned int r_sym;
104 /* The number of elements in elfNN_ia64_dyn_sym_info array. */
105 unsigned int count;
106 /* The number of sorted elements in elfNN_ia64_dyn_sym_info array. */
107 unsigned int sorted_count;
108 /* The size of elfNN_ia64_dyn_sym_info array. */
109 unsigned int size;
110 /* The array of elfNN_ia64_dyn_sym_info. */
111 struct elfNN_ia64_dyn_sym_info *info;
113 /* TRUE if this hash entry's addends was translated for
114 SHF_MERGE optimization. */
115 unsigned sec_merge_done : 1;
118 struct elfNN_ia64_link_hash_entry
120 struct elf_link_hash_entry root;
121 /* The number of elements in elfNN_ia64_dyn_sym_info array. */
122 unsigned int count;
123 /* The number of sorted elements in elfNN_ia64_dyn_sym_info array. */
124 unsigned int sorted_count;
125 /* The size of elfNN_ia64_dyn_sym_info array. */
126 unsigned int size;
127 /* The array of elfNN_ia64_dyn_sym_info. */
128 struct elfNN_ia64_dyn_sym_info *info;
131 struct elfNN_ia64_link_hash_table
133 /* The main hash table. */
134 struct elf_link_hash_table root;
136 asection *fptr_sec; /* Function descriptor table (or NULL). */
137 asection *rel_fptr_sec; /* Dynamic relocation section for same. */
138 asection *pltoff_sec; /* Private descriptors for plt (or NULL). */
139 asection *rel_pltoff_sec; /* Dynamic relocation section for same. */
141 bfd_size_type minplt_entries; /* Number of minplt entries. */
142 unsigned reltext : 1; /* Are there relocs against readonly sections? */
143 unsigned self_dtpmod_done : 1;/* Has self DTPMOD entry been finished? */
144 bfd_vma self_dtpmod_offset; /* .got offset to self DTPMOD entry. */
145 /* There are maybe R_IA64_GPREL22 relocations, including those
146 optimized from R_IA64_LTOFF22X, against non-SHF_IA_64_SHORT
147 sections. We need to record those sections so that we can choose
148 a proper GP to cover all R_IA64_GPREL22 relocations. */
149 asection *max_short_sec; /* Maximum short output section. */
150 bfd_vma max_short_offset; /* Maximum short offset. */
151 asection *min_short_sec; /* Minimum short output section. */
152 bfd_vma min_short_offset; /* Minimum short offset. */
154 htab_t loc_hash_table;
155 void *loc_hash_memory;
158 struct elfNN_ia64_allocate_data
160 struct bfd_link_info *info;
161 bfd_size_type ofs;
162 bfd_boolean only_got;
165 #define elfNN_ia64_hash_table(p) \
166 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
167 == IA64_ELF_DATA ? ((struct elfNN_ia64_link_hash_table *) ((p)->hash)) : NULL)
169 static struct elfNN_ia64_dyn_sym_info * get_dyn_sym_info
170 (struct elfNN_ia64_link_hash_table *ia64_info,
171 struct elf_link_hash_entry *h,
172 bfd *abfd, const Elf_Internal_Rela *rel, bfd_boolean create);
173 static bfd_boolean elfNN_ia64_dynamic_symbol_p
174 (struct elf_link_hash_entry *h, struct bfd_link_info *info, int);
175 static bfd_boolean elfNN_ia64_choose_gp
176 (bfd *abfd, struct bfd_link_info *info, bfd_boolean final);
177 static void elfNN_ia64_dyn_sym_traverse
178 (struct elfNN_ia64_link_hash_table *ia64_info,
179 bfd_boolean (*func) (struct elfNN_ia64_dyn_sym_info *, void *),
180 void * info);
181 static bfd_boolean allocate_global_data_got
182 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data);
183 static bfd_boolean allocate_global_fptr_got
184 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data);
185 static bfd_boolean allocate_local_got
186 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data);
187 static bfd_boolean elfNN_ia64_hpux_vec
188 (const bfd_target *vec);
189 static bfd_boolean allocate_dynrel_entries
190 (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data);
191 static asection *get_pltoff
192 (bfd *abfd, struct bfd_link_info *info,
193 struct elfNN_ia64_link_hash_table *ia64_info);
195 /* ia64-specific relocation. */
197 /* Given a ELF reloc, return the matching HOWTO structure. */
199 static bfd_boolean
200 elfNN_ia64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
201 arelent *bfd_reloc,
202 Elf_Internal_Rela *elf_reloc)
204 unsigned int r_type = ELF32_R_TYPE (elf_reloc->r_info);
206 bfd_reloc->howto = ia64_elf_lookup_howto (r_type);
207 if (bfd_reloc->howto == NULL)
209 /* xgettext:c-format */
210 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
211 abfd, r_type);
212 bfd_set_error (bfd_error_bad_value);
213 return FALSE;
216 return TRUE;
219 #define PLT_HEADER_SIZE (3 * 16)
220 #define PLT_MIN_ENTRY_SIZE (1 * 16)
221 #define PLT_FULL_ENTRY_SIZE (2 * 16)
222 #define PLT_RESERVED_WORDS 3
224 static const bfd_byte plt_header[PLT_HEADER_SIZE] =
226 0x0b, 0x10, 0x00, 0x1c, 0x00, 0x21, /* [MMI] mov r2=r14;; */
227 0xe0, 0x00, 0x08, 0x00, 0x48, 0x00, /* addl r14=0,r2 */
228 0x00, 0x00, 0x04, 0x00, /* nop.i 0x0;; */
229 0x0b, 0x80, 0x20, 0x1c, 0x18, 0x14, /* [MMI] ld8 r16=[r14],8;; */
230 0x10, 0x41, 0x38, 0x30, 0x28, 0x00, /* ld8 r17=[r14],8 */
231 0x00, 0x00, 0x04, 0x00, /* nop.i 0x0;; */
232 0x11, 0x08, 0x00, 0x1c, 0x18, 0x10, /* [MIB] ld8 r1=[r14] */
233 0x60, 0x88, 0x04, 0x80, 0x03, 0x00, /* mov b6=r17 */
234 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */
237 static const bfd_byte plt_min_entry[PLT_MIN_ENTRY_SIZE] =
239 0x11, 0x78, 0x00, 0x00, 0x00, 0x24, /* [MIB] mov r15=0 */
240 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, /* nop.i 0x0 */
241 0x00, 0x00, 0x00, 0x40 /* br.few 0 <PLT0>;; */
244 static const bfd_byte plt_full_entry[PLT_FULL_ENTRY_SIZE] =
246 0x0b, 0x78, 0x00, 0x02, 0x00, 0x24, /* [MMI] addl r15=0,r1;; */
247 0x00, 0x41, 0x3c, 0x70, 0x29, 0xc0, /* ld8.acq r16=[r15],8*/
248 0x01, 0x08, 0x00, 0x84, /* mov r14=r1;; */
249 0x11, 0x08, 0x00, 0x1e, 0x18, 0x10, /* [MIB] ld8 r1=[r15] */
250 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */
251 0x60, 0x00, 0x80, 0x00 /* br.few b6;; */
254 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
256 static const bfd_byte oor_brl[16] =
258 0x05, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */
259 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* brl.sptk.few tgt;; */
260 0x00, 0x00, 0x00, 0xc0
263 static const bfd_byte oor_ip[48] =
265 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MLX] nop.m 0 */
266 0x00, 0x00, 0x00, 0x00, 0x00, 0xe0, /* movl r15=0 */
267 0x01, 0x00, 0x00, 0x60,
268 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MII] nop.m 0 */
269 0x00, 0x01, 0x00, 0x60, 0x00, 0x00, /* mov r16=ip;; */
270 0xf2, 0x80, 0x00, 0x80, /* add r16=r15,r16;; */
271 0x11, 0x00, 0x00, 0x00, 0x01, 0x00, /* [MIB] nop.m 0 */
272 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, /* mov b6=r16 */
273 0x60, 0x00, 0x80, 0x00 /* br b6;; */
276 static size_t oor_branch_size = sizeof (oor_brl);
278 void
279 bfd_elfNN_ia64_after_parse (int itanium)
281 oor_branch_size = itanium ? sizeof (oor_ip) : sizeof (oor_brl);
285 /* Rename some of the generic section flags to better document how they
286 are used here. */
287 #define skip_relax_pass_0 sec_flg0
288 #define skip_relax_pass_1 sec_flg1
290 /* These functions do relaxation for IA-64 ELF. */
292 static void
293 elfNN_ia64_update_short_info (asection *sec, bfd_vma offset,
294 struct elfNN_ia64_link_hash_table *ia64_info)
296 /* Skip ABS and SHF_IA_64_SHORT sections. */
297 if (sec == bfd_abs_section_ptr
298 || (sec->flags & SEC_SMALL_DATA) != 0)
299 return;
301 if (!ia64_info->min_short_sec)
303 ia64_info->max_short_sec = sec;
304 ia64_info->max_short_offset = offset;
305 ia64_info->min_short_sec = sec;
306 ia64_info->min_short_offset = offset;
308 else if (sec == ia64_info->max_short_sec
309 && offset > ia64_info->max_short_offset)
310 ia64_info->max_short_offset = offset;
311 else if (sec == ia64_info->min_short_sec
312 && offset < ia64_info->min_short_offset)
313 ia64_info->min_short_offset = offset;
314 else if (sec->output_section->vma
315 > ia64_info->max_short_sec->vma)
317 ia64_info->max_short_sec = sec;
318 ia64_info->max_short_offset = offset;
320 else if (sec->output_section->vma
321 < ia64_info->min_short_sec->vma)
323 ia64_info->min_short_sec = sec;
324 ia64_info->min_short_offset = offset;
328 static bfd_boolean
329 elfNN_ia64_relax_section (bfd *abfd, asection *sec,
330 struct bfd_link_info *link_info,
331 bfd_boolean *again)
333 struct one_fixup
335 struct one_fixup *next;
336 asection *tsec;
337 bfd_vma toff;
338 bfd_vma trampoff;
341 Elf_Internal_Shdr *symtab_hdr;
342 Elf_Internal_Rela *internal_relocs;
343 Elf_Internal_Rela *irel, *irelend;
344 bfd_byte *contents;
345 Elf_Internal_Sym *isymbuf = NULL;
346 struct elfNN_ia64_link_hash_table *ia64_info;
347 struct one_fixup *fixups = NULL;
348 bfd_boolean changed_contents = FALSE;
349 bfd_boolean changed_relocs = FALSE;
350 bfd_boolean changed_got = FALSE;
351 bfd_boolean skip_relax_pass_0 = TRUE;
352 bfd_boolean skip_relax_pass_1 = TRUE;
353 bfd_vma gp = 0;
355 /* Assume we're not going to change any sizes, and we'll only need
356 one pass. */
357 *again = FALSE;
359 if (bfd_link_relocatable (link_info))
360 (*link_info->callbacks->einfo)
361 (_("%P%F: --relax and -r may not be used together\n"));
363 /* Don't even try to relax for non-ELF outputs. */
364 if (!is_elf_hash_table (link_info->hash))
365 return FALSE;
367 /* Nothing to do if there are no relocations or there is no need for
368 the current pass. */
369 if ((sec->flags & SEC_RELOC) == 0
370 || sec->reloc_count == 0
371 || (link_info->relax_pass == 0 && sec->skip_relax_pass_0)
372 || (link_info->relax_pass == 1 && sec->skip_relax_pass_1))
373 return TRUE;
375 ia64_info = elfNN_ia64_hash_table (link_info);
376 if (ia64_info == NULL)
377 return FALSE;
379 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
381 /* Load the relocations for this section. */
382 internal_relocs = (_bfd_elf_link_read_relocs
383 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
384 link_info->keep_memory));
385 if (internal_relocs == NULL)
386 return FALSE;
388 irelend = internal_relocs + sec->reloc_count;
390 /* Get the section contents. */
391 if (elf_section_data (sec)->this_hdr.contents != NULL)
392 contents = elf_section_data (sec)->this_hdr.contents;
393 else
395 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
396 goto error_return;
399 for (irel = internal_relocs; irel < irelend; irel++)
401 unsigned long r_type = ELFNN_R_TYPE (irel->r_info);
402 bfd_vma symaddr, reladdr, trampoff, toff, roff;
403 asection *tsec;
404 struct one_fixup *f;
405 bfd_size_type amt;
406 bfd_boolean is_branch;
407 struct elfNN_ia64_dyn_sym_info *dyn_i;
408 char symtype;
410 switch (r_type)
412 case R_IA64_PCREL21B:
413 case R_IA64_PCREL21BI:
414 case R_IA64_PCREL21M:
415 case R_IA64_PCREL21F:
416 /* In pass 1, all br relaxations are done. We can skip it. */
417 if (link_info->relax_pass == 1)
418 continue;
419 skip_relax_pass_0 = FALSE;
420 is_branch = TRUE;
421 break;
423 case R_IA64_PCREL60B:
424 /* We can't optimize brl to br in pass 0 since br relaxations
425 will increase the code size. Defer it to pass 1. */
426 if (link_info->relax_pass == 0)
428 skip_relax_pass_1 = FALSE;
429 continue;
431 is_branch = TRUE;
432 break;
434 case R_IA64_GPREL22:
435 /* Update max_short_sec/min_short_sec. */
437 case R_IA64_LTOFF22X:
438 case R_IA64_LDXMOV:
439 /* We can't relax ldx/mov in pass 0 since br relaxations will
440 increase the code size. Defer it to pass 1. */
441 if (link_info->relax_pass == 0)
443 skip_relax_pass_1 = FALSE;
444 continue;
446 is_branch = FALSE;
447 break;
449 default:
450 continue;
453 /* Get the value of the symbol referred to by the reloc. */
454 if (ELFNN_R_SYM (irel->r_info) < symtab_hdr->sh_info)
456 /* A local symbol. */
457 Elf_Internal_Sym *isym;
459 /* Read this BFD's local symbols. */
460 if (isymbuf == NULL)
462 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
463 if (isymbuf == NULL)
464 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
465 symtab_hdr->sh_info, 0,
466 NULL, NULL, NULL);
467 if (isymbuf == 0)
468 goto error_return;
471 isym = isymbuf + ELFNN_R_SYM (irel->r_info);
472 if (isym->st_shndx == SHN_UNDEF)
473 continue; /* We can't do anything with undefined symbols. */
474 else if (isym->st_shndx == SHN_ABS)
475 tsec = bfd_abs_section_ptr;
476 else if (isym->st_shndx == SHN_COMMON)
477 tsec = bfd_com_section_ptr;
478 else if (isym->st_shndx == SHN_IA_64_ANSI_COMMON)
479 tsec = bfd_com_section_ptr;
480 else
481 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
483 toff = isym->st_value;
484 dyn_i = get_dyn_sym_info (ia64_info, NULL, abfd, irel, FALSE);
485 symtype = ELF_ST_TYPE (isym->st_info);
487 else
489 unsigned long indx;
490 struct elf_link_hash_entry *h;
492 indx = ELFNN_R_SYM (irel->r_info) - symtab_hdr->sh_info;
493 h = elf_sym_hashes (abfd)[indx];
494 BFD_ASSERT (h != NULL);
496 while (h->root.type == bfd_link_hash_indirect
497 || h->root.type == bfd_link_hash_warning)
498 h = (struct elf_link_hash_entry *) h->root.u.i.link;
500 dyn_i = get_dyn_sym_info (ia64_info, h, abfd, irel, FALSE);
502 /* For branches to dynamic symbols, we're interested instead
503 in a branch to the PLT entry. */
504 if (is_branch && dyn_i && dyn_i->want_plt2)
506 /* Internal branches shouldn't be sent to the PLT.
507 Leave this for now and we'll give an error later. */
508 if (r_type != R_IA64_PCREL21B)
509 continue;
511 tsec = ia64_info->root.splt;
512 toff = dyn_i->plt2_offset;
513 BFD_ASSERT (irel->r_addend == 0);
516 /* Can't do anything else with dynamic symbols. */
517 else if (elfNN_ia64_dynamic_symbol_p (h, link_info, r_type))
518 continue;
520 else
522 /* We can't do anything with undefined symbols. */
523 if (h->root.type == bfd_link_hash_undefined
524 || h->root.type == bfd_link_hash_undefweak)
525 continue;
527 tsec = h->root.u.def.section;
528 toff = h->root.u.def.value;
531 symtype = h->type;
534 if (tsec->sec_info_type == SEC_INFO_TYPE_MERGE)
536 /* At this stage in linking, no SEC_MERGE symbol has been
537 adjusted, so all references to such symbols need to be
538 passed through _bfd_merged_section_offset. (Later, in
539 relocate_section, all SEC_MERGE symbols *except* for
540 section symbols have been adjusted.)
542 gas may reduce relocations against symbols in SEC_MERGE
543 sections to a relocation against the section symbol when
544 the original addend was zero. When the reloc is against
545 a section symbol we should include the addend in the
546 offset passed to _bfd_merged_section_offset, since the
547 location of interest is the original symbol. On the
548 other hand, an access to "sym+addend" where "sym" is not
549 a section symbol should not include the addend; Such an
550 access is presumed to be an offset from "sym"; The
551 location of interest is just "sym". */
552 if (symtype == STT_SECTION)
553 toff += irel->r_addend;
555 toff = _bfd_merged_section_offset (abfd, &tsec,
556 elf_section_data (tsec)->sec_info,
557 toff);
559 if (symtype != STT_SECTION)
560 toff += irel->r_addend;
562 else
563 toff += irel->r_addend;
565 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
567 roff = irel->r_offset;
569 if (is_branch)
571 bfd_signed_vma offset;
573 reladdr = (sec->output_section->vma
574 + sec->output_offset
575 + roff) & (bfd_vma) -4;
577 /* The .plt section is aligned at 32byte and the .text section
578 is aligned at 64byte. The .text section is right after the
579 .plt section. After the first relaxation pass, linker may
580 increase the gap between the .plt and .text sections up
581 to 32byte. We assume linker will always insert 32byte
582 between the .plt and .text sections after the first
583 relaxation pass. */
584 if (tsec == ia64_info->root.splt)
585 offset = -0x1000000 + 32;
586 else
587 offset = -0x1000000;
589 /* If the branch is in range, no need to do anything. */
590 if ((bfd_signed_vma) (symaddr - reladdr) >= offset
591 && (bfd_signed_vma) (symaddr - reladdr) <= 0x0FFFFF0)
593 /* If the 60-bit branch is in 21-bit range, optimize it. */
594 if (r_type == R_IA64_PCREL60B)
596 ia64_elf_relax_brl (contents, roff);
598 irel->r_info
599 = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
600 R_IA64_PCREL21B);
602 /* If the original relocation offset points to slot
603 1, change it to slot 2. */
604 if ((irel->r_offset & 3) == 1)
605 irel->r_offset += 1;
607 changed_contents = TRUE;
608 changed_relocs = TRUE;
611 continue;
613 else if (r_type == R_IA64_PCREL60B)
614 continue;
615 else if (ia64_elf_relax_br (contents, roff))
617 irel->r_info
618 = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
619 R_IA64_PCREL60B);
621 /* Make the relocation offset point to slot 1. */
622 irel->r_offset = (irel->r_offset & ~((bfd_vma) 0x3)) + 1;
624 changed_contents = TRUE;
625 changed_relocs = TRUE;
626 continue;
629 /* We can't put a trampoline in a .init/.fini section. Issue
630 an error. */
631 if (strcmp (sec->output_section->name, ".init") == 0
632 || strcmp (sec->output_section->name, ".fini") == 0)
634 _bfd_error_handler
635 /* xgettext:c-format */
636 (_("%pB: can't relax br at %#" PRIx64 " in section `%pA';"
637 " please use brl or indirect branch"),
638 sec->owner, (uint64_t) roff, sec);
639 bfd_set_error (bfd_error_bad_value);
640 goto error_return;
643 /* If the branch and target are in the same section, you've
644 got one honking big section and we can't help you unless
645 you are branching backwards. You'll get an error message
646 later. */
647 if (tsec == sec && toff > roff)
648 continue;
650 /* Look for an existing fixup to this address. */
651 for (f = fixups; f ; f = f->next)
652 if (f->tsec == tsec && f->toff == toff)
653 break;
655 if (f == NULL)
657 /* Two alternatives: If it's a branch to a PLT entry, we can
658 make a copy of the FULL_PLT entry. Otherwise, we'll have
659 to use a `brl' insn to get where we're going. */
661 size_t size;
663 if (tsec == ia64_info->root.splt)
664 size = sizeof (plt_full_entry);
665 else
666 size = oor_branch_size;
668 /* Resize the current section to make room for the new branch. */
669 trampoff = (sec->size + 15) & (bfd_vma) -16;
671 /* If trampoline is out of range, there is nothing we
672 can do. */
673 offset = trampoff - (roff & (bfd_vma) -4);
674 if (offset < -0x1000000 || offset > 0x0FFFFF0)
675 continue;
677 amt = trampoff + size;
678 contents = (bfd_byte *) bfd_realloc (contents, amt);
679 if (contents == NULL)
680 goto error_return;
681 sec->size = amt;
683 if (tsec == ia64_info->root.splt)
685 memcpy (contents + trampoff, plt_full_entry, size);
687 /* Hijack the old relocation for use as the PLTOFF reloc. */
688 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
689 R_IA64_PLTOFF22);
690 irel->r_offset = trampoff;
692 else
694 if (size == sizeof (oor_ip))
696 memcpy (contents + trampoff, oor_ip, size);
697 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
698 R_IA64_PCREL64I);
699 irel->r_addend -= 16;
700 irel->r_offset = trampoff + 2;
702 else
704 memcpy (contents + trampoff, oor_brl, size);
705 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
706 R_IA64_PCREL60B);
707 irel->r_offset = trampoff + 2;
712 /* Record the fixup so we don't do it again this section. */
713 f = (struct one_fixup *)
714 bfd_malloc ((bfd_size_type) sizeof (*f));
715 f->next = fixups;
716 f->tsec = tsec;
717 f->toff = toff;
718 f->trampoff = trampoff;
719 fixups = f;
721 else
723 /* If trampoline is out of range, there is nothing we
724 can do. */
725 offset = f->trampoff - (roff & (bfd_vma) -4);
726 if (offset < -0x1000000 || offset > 0x0FFFFF0)
727 continue;
729 /* Nop out the reloc, since we're finalizing things here. */
730 irel->r_info = ELFNN_R_INFO (0, R_IA64_NONE);
733 /* Fix up the existing branch to hit the trampoline. */
734 if (ia64_elf_install_value (contents + roff, offset, r_type)
735 != bfd_reloc_ok)
736 goto error_return;
738 changed_contents = TRUE;
739 changed_relocs = TRUE;
741 else
743 /* Fetch the gp. */
744 if (gp == 0)
746 bfd *obfd = sec->output_section->owner;
747 gp = _bfd_get_gp_value (obfd);
748 if (gp == 0)
750 if (!elfNN_ia64_choose_gp (obfd, link_info, FALSE))
751 goto error_return;
752 gp = _bfd_get_gp_value (obfd);
756 /* If the data is out of range, do nothing. */
757 if ((bfd_signed_vma) (symaddr - gp) >= 0x200000
758 ||(bfd_signed_vma) (symaddr - gp) < -0x200000)
759 continue;
761 if (r_type == R_IA64_GPREL22)
762 elfNN_ia64_update_short_info (tsec->output_section,
763 tsec->output_offset + toff,
764 ia64_info);
765 else if (r_type == R_IA64_LTOFF22X)
767 irel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (irel->r_info),
768 R_IA64_GPREL22);
769 changed_relocs = TRUE;
770 if (dyn_i->want_gotx)
772 dyn_i->want_gotx = 0;
773 changed_got |= !dyn_i->want_got;
776 elfNN_ia64_update_short_info (tsec->output_section,
777 tsec->output_offset + toff,
778 ia64_info);
780 else
782 ia64_elf_relax_ldxmov (contents, roff);
783 irel->r_info = ELFNN_R_INFO (0, R_IA64_NONE);
784 changed_contents = TRUE;
785 changed_relocs = TRUE;
790 /* ??? If we created fixups, this may push the code segment large
791 enough that the data segment moves, which will change the GP.
792 Reset the GP so that we re-calculate next round. We need to
793 do this at the _beginning_ of the next round; now will not do. */
795 /* Clean up and go home. */
796 while (fixups)
798 struct one_fixup *f = fixups;
799 fixups = fixups->next;
800 free (f);
803 if (isymbuf != NULL
804 && symtab_hdr->contents != (unsigned char *) isymbuf)
806 if (! link_info->keep_memory)
807 free (isymbuf);
808 else
810 /* Cache the symbols for elf_link_input_bfd. */
811 symtab_hdr->contents = (unsigned char *) isymbuf;
815 if (contents != NULL
816 && elf_section_data (sec)->this_hdr.contents != contents)
818 if (!changed_contents && !link_info->keep_memory)
819 free (contents);
820 else
822 /* Cache the section contents for elf_link_input_bfd. */
823 elf_section_data (sec)->this_hdr.contents = contents;
827 if (elf_section_data (sec)->relocs != internal_relocs)
829 if (!changed_relocs)
830 free (internal_relocs);
831 else
832 elf_section_data (sec)->relocs = internal_relocs;
835 if (changed_got)
837 struct elfNN_ia64_allocate_data data;
838 data.info = link_info;
839 data.ofs = 0;
840 ia64_info->self_dtpmod_offset = (bfd_vma) -1;
842 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data);
843 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data);
844 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data);
845 ia64_info->root.sgot->size = data.ofs;
847 if (ia64_info->root.dynamic_sections_created
848 && ia64_info->root.srelgot != NULL)
850 /* Resize .rela.got. */
851 ia64_info->root.srelgot->size = 0;
852 if (bfd_link_pic (link_info)
853 && ia64_info->self_dtpmod_offset != (bfd_vma) -1)
854 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
855 data.only_got = TRUE;
856 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_dynrel_entries,
857 &data);
861 if (link_info->relax_pass == 0)
863 /* Pass 0 is only needed to relax br. */
864 sec->skip_relax_pass_0 = skip_relax_pass_0;
865 sec->skip_relax_pass_1 = skip_relax_pass_1;
868 *again = changed_contents || changed_relocs;
869 return TRUE;
871 error_return:
872 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
873 free (isymbuf);
874 if (contents != NULL
875 && elf_section_data (sec)->this_hdr.contents != contents)
876 free (contents);
877 if (internal_relocs != NULL
878 && elf_section_data (sec)->relocs != internal_relocs)
879 free (internal_relocs);
880 return FALSE;
882 #undef skip_relax_pass_0
883 #undef skip_relax_pass_1
885 /* Return TRUE if NAME is an unwind table section name. */
887 static inline bfd_boolean
888 is_unwind_section_name (bfd *abfd, const char *name)
890 if (elfNN_ia64_hpux_vec (abfd->xvec)
891 && !strcmp (name, ELF_STRING_ia64_unwind_hdr))
892 return FALSE;
894 return ((CONST_STRNEQ (name, ELF_STRING_ia64_unwind)
895 && ! CONST_STRNEQ (name, ELF_STRING_ia64_unwind_info))
896 || CONST_STRNEQ (name, ELF_STRING_ia64_unwind_once));
899 /* Handle an IA-64 specific section when reading an object file. This
900 is called when bfd_section_from_shdr finds a section with an unknown
901 type. */
903 static bfd_boolean
904 elfNN_ia64_section_from_shdr (bfd *abfd,
905 Elf_Internal_Shdr *hdr,
906 const char *name,
907 int shindex)
909 /* There ought to be a place to keep ELF backend specific flags, but
910 at the moment there isn't one. We just keep track of the
911 sections by their name, instead. Fortunately, the ABI gives
912 suggested names for all the MIPS specific sections, so we will
913 probably get away with this. */
914 switch (hdr->sh_type)
916 case SHT_IA_64_UNWIND:
917 case SHT_IA_64_HP_OPT_ANOT:
918 break;
920 case SHT_IA_64_EXT:
921 if (strcmp (name, ELF_STRING_ia64_archext) != 0)
922 return FALSE;
923 break;
925 default:
926 return FALSE;
929 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
930 return FALSE;
932 return TRUE;
935 /* Convert IA-64 specific section flags to bfd internal section flags. */
937 /* ??? There is no bfd internal flag equivalent to the SHF_IA_64_NORECOV
938 flag. */
940 static bfd_boolean
941 elfNN_ia64_section_flags (flagword *flags,
942 const Elf_Internal_Shdr *hdr)
944 if (hdr->sh_flags & SHF_IA_64_SHORT)
945 *flags |= SEC_SMALL_DATA;
947 return TRUE;
950 /* Set the correct type for an IA-64 ELF section. We do this by the
951 section name, which is a hack, but ought to work. */
953 static bfd_boolean
954 elfNN_ia64_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr,
955 asection *sec)
957 const char *name;
959 name = bfd_get_section_name (abfd, sec);
961 if (is_unwind_section_name (abfd, name))
963 /* We don't have the sections numbered at this point, so sh_info
964 is set later, in elfNN_ia64_final_write_processing. */
965 hdr->sh_type = SHT_IA_64_UNWIND;
966 hdr->sh_flags |= SHF_LINK_ORDER;
968 else if (strcmp (name, ELF_STRING_ia64_archext) == 0)
969 hdr->sh_type = SHT_IA_64_EXT;
970 else if (strcmp (name, ".HP.opt_annot") == 0)
971 hdr->sh_type = SHT_IA_64_HP_OPT_ANOT;
972 else if (strcmp (name, ".reloc") == 0)
973 /* This is an ugly, but unfortunately necessary hack that is
974 needed when producing EFI binaries on IA-64. It tells
975 elf.c:elf_fake_sections() not to consider ".reloc" as a section
976 containing ELF relocation info. We need this hack in order to
977 be able to generate ELF binaries that can be translated into
978 EFI applications (which are essentially COFF objects). Those
979 files contain a COFF ".reloc" section inside an ELFNN object,
980 which would normally cause BFD to segfault because it would
981 attempt to interpret this section as containing relocation
982 entries for section "oc". With this hack enabled, ".reloc"
983 will be treated as a normal data section, which will avoid the
984 segfault. However, you won't be able to create an ELFNN binary
985 with a section named "oc" that needs relocations, but that's
986 the kind of ugly side-effects you get when detecting section
987 types based on their names... In practice, this limitation is
988 unlikely to bite. */
989 hdr->sh_type = SHT_PROGBITS;
991 if (sec->flags & SEC_SMALL_DATA)
992 hdr->sh_flags |= SHF_IA_64_SHORT;
994 /* Some HP linkers look for the SHF_IA_64_HP_TLS flag instead of SHF_TLS. */
996 if (elfNN_ia64_hpux_vec (abfd->xvec) && (sec->flags & SHF_TLS))
997 hdr->sh_flags |= SHF_IA_64_HP_TLS;
999 return TRUE;
1002 /* The final processing done just before writing out an IA-64 ELF
1003 object file. */
1005 static void
1006 elfNN_ia64_final_write_processing (bfd *abfd,
1007 bfd_boolean linker ATTRIBUTE_UNUSED)
1009 Elf_Internal_Shdr *hdr;
1010 asection *s;
1012 for (s = abfd->sections; s; s = s->next)
1014 hdr = &elf_section_data (s)->this_hdr;
1015 switch (hdr->sh_type)
1017 case SHT_IA_64_UNWIND:
1018 /* The IA-64 processor-specific ABI requires setting sh_link
1019 to the unwind section, whereas HP-UX requires sh_info to
1020 do so. For maximum compatibility, we'll set both for
1021 now... */
1022 hdr->sh_info = hdr->sh_link;
1023 break;
1027 if (! elf_flags_init (abfd))
1029 unsigned long flags = 0;
1031 if (abfd->xvec->byteorder == BFD_ENDIAN_BIG)
1032 flags |= EF_IA_64_BE;
1033 if (bfd_get_mach (abfd) == bfd_mach_ia64_elf64)
1034 flags |= EF_IA_64_ABI64;
1036 elf_elfheader(abfd)->e_flags = flags;
1037 elf_flags_init (abfd) = TRUE;
1041 /* Hook called by the linker routine which adds symbols from an object
1042 file. We use it to put .comm items in .sbss, and not .bss. */
1044 static bfd_boolean
1045 elfNN_ia64_add_symbol_hook (bfd *abfd,
1046 struct bfd_link_info *info,
1047 Elf_Internal_Sym *sym,
1048 const char **namep ATTRIBUTE_UNUSED,
1049 flagword *flagsp ATTRIBUTE_UNUSED,
1050 asection **secp,
1051 bfd_vma *valp)
1053 if (sym->st_shndx == SHN_COMMON
1054 && !bfd_link_relocatable (info)
1055 && sym->st_size <= elf_gp_size (abfd))
1057 /* Common symbols less than or equal to -G nn bytes are
1058 automatically put into .sbss. */
1060 asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
1062 if (scomm == NULL)
1064 scomm = bfd_make_section_with_flags (abfd, ".scommon",
1065 (SEC_ALLOC
1066 | SEC_IS_COMMON
1067 | SEC_LINKER_CREATED));
1068 if (scomm == NULL)
1069 return FALSE;
1072 *secp = scomm;
1073 *valp = sym->st_size;
1076 return TRUE;
1079 /* Return the number of additional phdrs we will need. */
1081 static int
1082 elfNN_ia64_additional_program_headers (bfd *abfd,
1083 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1085 asection *s;
1086 int ret = 0;
1088 /* See if we need a PT_IA_64_ARCHEXT segment. */
1089 s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_archext);
1090 if (s && (s->flags & SEC_LOAD))
1091 ++ret;
1093 /* Count how many PT_IA_64_UNWIND segments we need. */
1094 for (s = abfd->sections; s; s = s->next)
1095 if (is_unwind_section_name (abfd, s->name) && (s->flags & SEC_LOAD))
1096 ++ret;
1098 return ret;
1101 static bfd_boolean
1102 elfNN_ia64_modify_segment_map (bfd *abfd,
1103 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1105 struct elf_segment_map *m, **pm;
1106 Elf_Internal_Shdr *hdr;
1107 asection *s;
1109 /* If we need a PT_IA_64_ARCHEXT segment, it must come before
1110 all PT_LOAD segments. */
1111 s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_archext);
1112 if (s && (s->flags & SEC_LOAD))
1114 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
1115 if (m->p_type == PT_IA_64_ARCHEXT)
1116 break;
1117 if (m == NULL)
1119 m = ((struct elf_segment_map *)
1120 bfd_zalloc (abfd, (bfd_size_type) sizeof *m));
1121 if (m == NULL)
1122 return FALSE;
1124 m->p_type = PT_IA_64_ARCHEXT;
1125 m->count = 1;
1126 m->sections[0] = s;
1128 /* We want to put it after the PHDR and INTERP segments. */
1129 pm = &elf_seg_map (abfd);
1130 while (*pm != NULL
1131 && ((*pm)->p_type == PT_PHDR
1132 || (*pm)->p_type == PT_INTERP))
1133 pm = &(*pm)->next;
1135 m->next = *pm;
1136 *pm = m;
1140 /* Install PT_IA_64_UNWIND segments, if needed. */
1141 for (s = abfd->sections; s; s = s->next)
1143 hdr = &elf_section_data (s)->this_hdr;
1144 if (hdr->sh_type != SHT_IA_64_UNWIND)
1145 continue;
1147 if (s && (s->flags & SEC_LOAD))
1149 for (m = elf_seg_map (abfd); m != NULL; m = m->next)
1150 if (m->p_type == PT_IA_64_UNWIND)
1152 int i;
1154 /* Look through all sections in the unwind segment
1155 for a match since there may be multiple sections
1156 to a segment. */
1157 for (i = m->count - 1; i >= 0; --i)
1158 if (m->sections[i] == s)
1159 break;
1161 if (i >= 0)
1162 break;
1165 if (m == NULL)
1167 m = ((struct elf_segment_map *)
1168 bfd_zalloc (abfd, (bfd_size_type) sizeof *m));
1169 if (m == NULL)
1170 return FALSE;
1172 m->p_type = PT_IA_64_UNWIND;
1173 m->count = 1;
1174 m->sections[0] = s;
1175 m->next = NULL;
1177 /* We want to put it last. */
1178 pm = &elf_seg_map (abfd);
1179 while (*pm != NULL)
1180 pm = &(*pm)->next;
1181 *pm = m;
1186 return TRUE;
1189 /* Turn on PF_IA_64_NORECOV if needed. This involves traversing all of
1190 the input sections for each output section in the segment and testing
1191 for SHF_IA_64_NORECOV on each. */
1193 static bfd_boolean
1194 elfNN_ia64_modify_program_headers (bfd *abfd,
1195 struct bfd_link_info *info ATTRIBUTE_UNUSED)
1197 struct elf_obj_tdata *tdata = elf_tdata (abfd);
1198 struct elf_segment_map *m;
1199 Elf_Internal_Phdr *p;
1201 for (p = tdata->phdr, m = elf_seg_map (abfd); m != NULL; m = m->next, p++)
1202 if (m->p_type == PT_LOAD)
1204 int i;
1205 for (i = m->count - 1; i >= 0; --i)
1207 struct bfd_link_order *order = m->sections[i]->map_head.link_order;
1209 while (order != NULL)
1211 if (order->type == bfd_indirect_link_order)
1213 asection *is = order->u.indirect.section;
1214 bfd_vma flags = elf_section_data(is)->this_hdr.sh_flags;
1215 if (flags & SHF_IA_64_NORECOV)
1217 p->p_flags |= PF_IA_64_NORECOV;
1218 goto found;
1221 order = order->next;
1224 found:;
1227 return TRUE;
1230 /* According to the Tahoe assembler spec, all labels starting with a
1231 '.' are local. */
1233 static bfd_boolean
1234 elfNN_ia64_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED,
1235 const char *name)
1237 return name[0] == '.';
1240 /* Should we do dynamic things to this symbol? */
1242 static bfd_boolean
1243 elfNN_ia64_dynamic_symbol_p (struct elf_link_hash_entry *h,
1244 struct bfd_link_info *info, int r_type)
1246 bfd_boolean ignore_protected
1247 = ((r_type & 0xf8) == 0x40 /* FPTR relocs */
1248 || (r_type & 0xf8) == 0x50); /* LTOFF_FPTR relocs */
1250 return _bfd_elf_dynamic_symbol_p (h, info, ignore_protected);
1253 static struct bfd_hash_entry*
1254 elfNN_ia64_new_elf_hash_entry (struct bfd_hash_entry *entry,
1255 struct bfd_hash_table *table,
1256 const char *string)
1258 struct elfNN_ia64_link_hash_entry *ret;
1259 ret = (struct elfNN_ia64_link_hash_entry *) entry;
1261 /* Allocate the structure if it has not already been allocated by a
1262 subclass. */
1263 if (!ret)
1264 ret = bfd_hash_allocate (table, sizeof (*ret));
1266 if (!ret)
1267 return 0;
1269 /* Call the allocation method of the superclass. */
1270 ret = ((struct elfNN_ia64_link_hash_entry *)
1271 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1272 table, string));
1274 ret->info = NULL;
1275 ret->count = 0;
1276 ret->sorted_count = 0;
1277 ret->size = 0;
1278 return (struct bfd_hash_entry *) ret;
1281 static void
1282 elfNN_ia64_hash_copy_indirect (struct bfd_link_info *info,
1283 struct elf_link_hash_entry *xdir,
1284 struct elf_link_hash_entry *xind)
1286 struct elfNN_ia64_link_hash_entry *dir, *ind;
1288 dir = (struct elfNN_ia64_link_hash_entry *) xdir;
1289 ind = (struct elfNN_ia64_link_hash_entry *) xind;
1291 /* Copy down any references that we may have already seen to the
1292 symbol which just became indirect. */
1294 if (dir->root.versioned != versioned_hidden)
1295 dir->root.ref_dynamic |= ind->root.ref_dynamic;
1296 dir->root.ref_regular |= ind->root.ref_regular;
1297 dir->root.ref_regular_nonweak |= ind->root.ref_regular_nonweak;
1298 dir->root.needs_plt |= ind->root.needs_plt;
1300 if (ind->root.root.type != bfd_link_hash_indirect)
1301 return;
1303 /* Copy over the got and plt data. This would have been done
1304 by check_relocs. */
1306 if (ind->info != NULL)
1308 struct elfNN_ia64_dyn_sym_info *dyn_i;
1309 unsigned int count;
1311 if (dir->info)
1312 free (dir->info);
1314 dir->info = ind->info;
1315 dir->count = ind->count;
1316 dir->sorted_count = ind->sorted_count;
1317 dir->size = ind->size;
1319 ind->info = NULL;
1320 ind->count = 0;
1321 ind->sorted_count = 0;
1322 ind->size = 0;
1324 /* Fix up the dyn_sym_info pointers to the global symbol. */
1325 for (count = dir->count, dyn_i = dir->info;
1326 count != 0;
1327 count--, dyn_i++)
1328 dyn_i->h = &dir->root;
1331 /* Copy over the dynindx. */
1333 if (ind->root.dynindx != -1)
1335 if (dir->root.dynindx != -1)
1336 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1337 dir->root.dynstr_index);
1338 dir->root.dynindx = ind->root.dynindx;
1339 dir->root.dynstr_index = ind->root.dynstr_index;
1340 ind->root.dynindx = -1;
1341 ind->root.dynstr_index = 0;
1345 static void
1346 elfNN_ia64_hash_hide_symbol (struct bfd_link_info *info,
1347 struct elf_link_hash_entry *xh,
1348 bfd_boolean force_local)
1350 struct elfNN_ia64_link_hash_entry *h;
1351 struct elfNN_ia64_dyn_sym_info *dyn_i;
1352 unsigned int count;
1354 h = (struct elfNN_ia64_link_hash_entry *)xh;
1356 _bfd_elf_link_hash_hide_symbol (info, &h->root, force_local);
1358 for (count = h->count, dyn_i = h->info;
1359 count != 0;
1360 count--, dyn_i++)
1362 dyn_i->want_plt2 = 0;
1363 dyn_i->want_plt = 0;
1367 /* Compute a hash of a local hash entry. */
1369 static hashval_t
1370 elfNN_ia64_local_htab_hash (const void *ptr)
1372 struct elfNN_ia64_local_hash_entry *entry
1373 = (struct elfNN_ia64_local_hash_entry *) ptr;
1375 return ELF_LOCAL_SYMBOL_HASH (entry->id, entry->r_sym);
1378 /* Compare local hash entries. */
1380 static int
1381 elfNN_ia64_local_htab_eq (const void *ptr1, const void *ptr2)
1383 struct elfNN_ia64_local_hash_entry *entry1
1384 = (struct elfNN_ia64_local_hash_entry *) ptr1;
1385 struct elfNN_ia64_local_hash_entry *entry2
1386 = (struct elfNN_ia64_local_hash_entry *) ptr2;
1388 return entry1->id == entry2->id && entry1->r_sym == entry2->r_sym;
1391 /* Free the global elfNN_ia64_dyn_sym_info array. */
1393 static bfd_boolean
1394 elfNN_ia64_global_dyn_info_free (void **xentry,
1395 void * unused ATTRIBUTE_UNUSED)
1397 struct elfNN_ia64_link_hash_entry *entry
1398 = (struct elfNN_ia64_link_hash_entry *) xentry;
1400 if (entry->info)
1402 free (entry->info);
1403 entry->info = NULL;
1404 entry->count = 0;
1405 entry->sorted_count = 0;
1406 entry->size = 0;
1409 return TRUE;
1412 /* Free the local elfNN_ia64_dyn_sym_info array. */
1414 static bfd_boolean
1415 elfNN_ia64_local_dyn_info_free (void **slot,
1416 void * unused ATTRIBUTE_UNUSED)
1418 struct elfNN_ia64_local_hash_entry *entry
1419 = (struct elfNN_ia64_local_hash_entry *) *slot;
1421 if (entry->info)
1423 free (entry->info);
1424 entry->info = NULL;
1425 entry->count = 0;
1426 entry->sorted_count = 0;
1427 entry->size = 0;
1430 return TRUE;
1433 /* Destroy IA-64 linker hash table. */
1435 static void
1436 elfNN_ia64_link_hash_table_free (bfd *obfd)
1438 struct elfNN_ia64_link_hash_table *ia64_info
1439 = (struct elfNN_ia64_link_hash_table *) obfd->link.hash;
1440 if (ia64_info->loc_hash_table)
1442 htab_traverse (ia64_info->loc_hash_table,
1443 elfNN_ia64_local_dyn_info_free, NULL);
1444 htab_delete (ia64_info->loc_hash_table);
1446 if (ia64_info->loc_hash_memory)
1447 objalloc_free ((struct objalloc *) ia64_info->loc_hash_memory);
1448 elf_link_hash_traverse (&ia64_info->root,
1449 elfNN_ia64_global_dyn_info_free, NULL);
1450 _bfd_elf_link_hash_table_free (obfd);
1453 /* Create the derived linker hash table. The IA-64 ELF port uses this
1454 derived hash table to keep information specific to the IA-64 ElF
1455 linker (without using static variables). */
1457 static struct bfd_link_hash_table *
1458 elfNN_ia64_hash_table_create (bfd *abfd)
1460 struct elfNN_ia64_link_hash_table *ret;
1462 ret = bfd_zmalloc ((bfd_size_type) sizeof (*ret));
1463 if (!ret)
1464 return NULL;
1466 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
1467 elfNN_ia64_new_elf_hash_entry,
1468 sizeof (struct elfNN_ia64_link_hash_entry),
1469 IA64_ELF_DATA))
1471 free (ret);
1472 return NULL;
1475 ret->loc_hash_table = htab_try_create (1024, elfNN_ia64_local_htab_hash,
1476 elfNN_ia64_local_htab_eq, NULL);
1477 ret->loc_hash_memory = objalloc_create ();
1478 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1480 elfNN_ia64_link_hash_table_free (abfd);
1481 return NULL;
1483 ret->root.root.hash_table_free = elfNN_ia64_link_hash_table_free;
1485 return &ret->root.root;
1488 /* Traverse both local and global hash tables. */
1490 struct elfNN_ia64_dyn_sym_traverse_data
1492 bfd_boolean (*func) (struct elfNN_ia64_dyn_sym_info *, void *);
1493 void * data;
1496 static bfd_boolean
1497 elfNN_ia64_global_dyn_sym_thunk (struct bfd_hash_entry *xentry,
1498 void * xdata)
1500 struct elfNN_ia64_link_hash_entry *entry
1501 = (struct elfNN_ia64_link_hash_entry *) xentry;
1502 struct elfNN_ia64_dyn_sym_traverse_data *data
1503 = (struct elfNN_ia64_dyn_sym_traverse_data *) xdata;
1504 struct elfNN_ia64_dyn_sym_info *dyn_i;
1505 unsigned int count;
1507 for (count = entry->count, dyn_i = entry->info;
1508 count != 0;
1509 count--, dyn_i++)
1510 if (! (*data->func) (dyn_i, data->data))
1511 return FALSE;
1512 return TRUE;
1515 static bfd_boolean
1516 elfNN_ia64_local_dyn_sym_thunk (void **slot, void * xdata)
1518 struct elfNN_ia64_local_hash_entry *entry
1519 = (struct elfNN_ia64_local_hash_entry *) *slot;
1520 struct elfNN_ia64_dyn_sym_traverse_data *data
1521 = (struct elfNN_ia64_dyn_sym_traverse_data *) xdata;
1522 struct elfNN_ia64_dyn_sym_info *dyn_i;
1523 unsigned int count;
1525 for (count = entry->count, dyn_i = entry->info;
1526 count != 0;
1527 count--, dyn_i++)
1528 if (! (*data->func) (dyn_i, data->data))
1529 return FALSE;
1530 return TRUE;
1533 static void
1534 elfNN_ia64_dyn_sym_traverse (struct elfNN_ia64_link_hash_table *ia64_info,
1535 bfd_boolean (*func) (struct elfNN_ia64_dyn_sym_info *, void *),
1536 void * data)
1538 struct elfNN_ia64_dyn_sym_traverse_data xdata;
1540 xdata.func = func;
1541 xdata.data = data;
1543 elf_link_hash_traverse (&ia64_info->root,
1544 elfNN_ia64_global_dyn_sym_thunk, &xdata);
1545 htab_traverse (ia64_info->loc_hash_table,
1546 elfNN_ia64_local_dyn_sym_thunk, &xdata);
1549 static bfd_boolean
1550 elfNN_ia64_create_dynamic_sections (bfd *abfd,
1551 struct bfd_link_info *info)
1553 struct elfNN_ia64_link_hash_table *ia64_info;
1554 asection *s;
1556 if (! _bfd_elf_create_dynamic_sections (abfd, info))
1557 return FALSE;
1559 ia64_info = elfNN_ia64_hash_table (info);
1560 if (ia64_info == NULL)
1561 return FALSE;
1564 flagword flags = bfd_get_section_flags (abfd, ia64_info->root.sgot);
1565 bfd_set_section_flags (abfd, ia64_info->root.sgot,
1566 SEC_SMALL_DATA | flags);
1567 /* The .got section is always aligned at 8 bytes. */
1568 if (! bfd_set_section_alignment (abfd, ia64_info->root.sgot, 3))
1569 return FALSE;
1572 if (!get_pltoff (abfd, info, ia64_info))
1573 return FALSE;
1575 s = bfd_make_section_anyway_with_flags (abfd, ".rela.IA_64.pltoff",
1576 (SEC_ALLOC | SEC_LOAD
1577 | SEC_HAS_CONTENTS
1578 | SEC_IN_MEMORY
1579 | SEC_LINKER_CREATED
1580 | SEC_READONLY));
1581 if (s == NULL
1582 || !bfd_set_section_alignment (abfd, s, LOG_SECTION_ALIGN))
1583 return FALSE;
1584 ia64_info->rel_pltoff_sec = s;
1586 return TRUE;
1589 /* Find and/or create a hash entry for local symbol. */
1590 static struct elfNN_ia64_local_hash_entry *
1591 get_local_sym_hash (struct elfNN_ia64_link_hash_table *ia64_info,
1592 bfd *abfd, const Elf_Internal_Rela *rel,
1593 bfd_boolean create)
1595 struct elfNN_ia64_local_hash_entry e, *ret;
1596 asection *sec = abfd->sections;
1597 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
1598 ELFNN_R_SYM (rel->r_info));
1599 void **slot;
1601 e.id = sec->id;
1602 e.r_sym = ELFNN_R_SYM (rel->r_info);
1603 slot = htab_find_slot_with_hash (ia64_info->loc_hash_table, &e, h,
1604 create ? INSERT : NO_INSERT);
1606 if (!slot)
1607 return NULL;
1609 if (*slot)
1610 return (struct elfNN_ia64_local_hash_entry *) *slot;
1612 ret = (struct elfNN_ia64_local_hash_entry *)
1613 objalloc_alloc ((struct objalloc *) ia64_info->loc_hash_memory,
1614 sizeof (struct elfNN_ia64_local_hash_entry));
1615 if (ret)
1617 memset (ret, 0, sizeof (*ret));
1618 ret->id = sec->id;
1619 ret->r_sym = ELFNN_R_SYM (rel->r_info);
1620 *slot = ret;
1622 return ret;
1625 /* Used to sort elfNN_ia64_dyn_sym_info array. */
1627 static int
1628 addend_compare (const void *xp, const void *yp)
1630 const struct elfNN_ia64_dyn_sym_info *x
1631 = (const struct elfNN_ia64_dyn_sym_info *) xp;
1632 const struct elfNN_ia64_dyn_sym_info *y
1633 = (const struct elfNN_ia64_dyn_sym_info *) yp;
1635 return x->addend < y->addend ? -1 : x->addend > y->addend ? 1 : 0;
1638 /* Sort elfNN_ia64_dyn_sym_info array and remove duplicates. */
1640 static unsigned int
1641 sort_dyn_sym_info (struct elfNN_ia64_dyn_sym_info *info,
1642 unsigned int count)
1644 bfd_vma curr, prev, got_offset;
1645 unsigned int i, kept, dupes, diff, dest, src, len;
1647 qsort (info, count, sizeof (*info), addend_compare);
1649 /* Find the first duplicate. */
1650 prev = info [0].addend;
1651 got_offset = info [0].got_offset;
1652 for (i = 1; i < count; i++)
1654 curr = info [i].addend;
1655 if (curr == prev)
1657 /* For duplicates, make sure that GOT_OFFSET is valid. */
1658 if (got_offset == (bfd_vma) -1)
1659 got_offset = info [i].got_offset;
1660 break;
1662 got_offset = info [i].got_offset;
1663 prev = curr;
1666 /* We may move a block of elements to here. */
1667 dest = i++;
1669 /* Remove duplicates. */
1670 if (i < count)
1672 while (i < count)
1674 /* For duplicates, make sure that the kept one has a valid
1675 got_offset. */
1676 kept = dest - 1;
1677 if (got_offset != (bfd_vma) -1)
1678 info [kept].got_offset = got_offset;
1680 curr = info [i].addend;
1681 got_offset = info [i].got_offset;
1683 /* Move a block of elements whose first one is different from
1684 the previous. */
1685 if (curr == prev)
1687 for (src = i + 1; src < count; src++)
1689 if (info [src].addend != curr)
1690 break;
1691 /* For duplicates, make sure that GOT_OFFSET is
1692 valid. */
1693 if (got_offset == (bfd_vma) -1)
1694 got_offset = info [src].got_offset;
1697 /* Make sure that the kept one has a valid got_offset. */
1698 if (got_offset != (bfd_vma) -1)
1699 info [kept].got_offset = got_offset;
1701 else
1702 src = i;
1704 if (src >= count)
1705 break;
1707 /* Find the next duplicate. SRC will be kept. */
1708 prev = info [src].addend;
1709 got_offset = info [src].got_offset;
1710 for (dupes = src + 1; dupes < count; dupes ++)
1712 curr = info [dupes].addend;
1713 if (curr == prev)
1715 /* Make sure that got_offset is valid. */
1716 if (got_offset == (bfd_vma) -1)
1717 got_offset = info [dupes].got_offset;
1719 /* For duplicates, make sure that the kept one has
1720 a valid got_offset. */
1721 if (got_offset != (bfd_vma) -1)
1722 info [dupes - 1].got_offset = got_offset;
1723 break;
1725 got_offset = info [dupes].got_offset;
1726 prev = curr;
1729 /* How much to move. */
1730 len = dupes - src;
1731 i = dupes + 1;
1733 if (len == 1 && dupes < count)
1735 /* If we only move 1 element, we combine it with the next
1736 one. There must be at least a duplicate. Find the
1737 next different one. */
1738 for (diff = dupes + 1, src++; diff < count; diff++, src++)
1740 if (info [diff].addend != curr)
1741 break;
1742 /* Make sure that got_offset is valid. */
1743 if (got_offset == (bfd_vma) -1)
1744 got_offset = info [diff].got_offset;
1747 /* Makre sure that the last duplicated one has an valid
1748 offset. */
1749 BFD_ASSERT (curr == prev);
1750 if (got_offset != (bfd_vma) -1)
1751 info [diff - 1].got_offset = got_offset;
1753 if (diff < count)
1755 /* Find the next duplicate. Track the current valid
1756 offset. */
1757 prev = info [diff].addend;
1758 got_offset = info [diff].got_offset;
1759 for (dupes = diff + 1; dupes < count; dupes ++)
1761 curr = info [dupes].addend;
1762 if (curr == prev)
1764 /* For duplicates, make sure that GOT_OFFSET
1765 is valid. */
1766 if (got_offset == (bfd_vma) -1)
1767 got_offset = info [dupes].got_offset;
1768 break;
1770 got_offset = info [dupes].got_offset;
1771 prev = curr;
1772 diff++;
1775 len = diff - src + 1;
1776 i = diff + 1;
1780 memmove (&info [dest], &info [src], len * sizeof (*info));
1782 dest += len;
1785 count = dest;
1787 else
1789 /* When we get here, either there is no duplicate at all or
1790 the only duplicate is the last element. */
1791 if (dest < count)
1793 /* If the last element is a duplicate, make sure that the
1794 kept one has a valid got_offset. We also update count. */
1795 if (got_offset != (bfd_vma) -1)
1796 info [dest - 1].got_offset = got_offset;
1797 count = dest;
1801 return count;
1804 /* Find and/or create a descriptor for dynamic symbol info. This will
1805 vary based on global or local symbol, and the addend to the reloc.
1807 We don't sort when inserting. Also, we sort and eliminate
1808 duplicates if there is an unsorted section. Typically, this will
1809 only happen once, because we do all insertions before lookups. We
1810 then use bsearch to do a lookup. This also allows lookups to be
1811 fast. So we have fast insertion (O(log N) due to duplicate check),
1812 fast lookup (O(log N)) and one sort (O(N log N) expected time).
1813 Previously, all lookups were O(N) because of the use of the linked
1814 list and also all insertions were O(N) because of the check for
1815 duplicates. There are some complications here because the array
1816 size grows occasionally, which may add an O(N) factor, but this
1817 should be rare. Also, we free the excess array allocation, which
1818 requires a copy which is O(N), but this only happens once. */
1820 static struct elfNN_ia64_dyn_sym_info *
1821 get_dyn_sym_info (struct elfNN_ia64_link_hash_table *ia64_info,
1822 struct elf_link_hash_entry *h, bfd *abfd,
1823 const Elf_Internal_Rela *rel, bfd_boolean create)
1825 struct elfNN_ia64_dyn_sym_info **info_p, *info, *dyn_i, key;
1826 unsigned int *count_p, *sorted_count_p, *size_p;
1827 unsigned int count, sorted_count, size;
1828 bfd_vma addend = rel ? rel->r_addend : 0;
1829 bfd_size_type amt;
1831 if (h)
1833 struct elfNN_ia64_link_hash_entry *global_h;
1835 global_h = (struct elfNN_ia64_link_hash_entry *) h;
1836 info_p = &global_h->info;
1837 count_p = &global_h->count;
1838 sorted_count_p = &global_h->sorted_count;
1839 size_p = &global_h->size;
1841 else
1843 struct elfNN_ia64_local_hash_entry *loc_h;
1845 loc_h = get_local_sym_hash (ia64_info, abfd, rel, create);
1846 if (!loc_h)
1848 BFD_ASSERT (!create);
1849 return NULL;
1852 info_p = &loc_h->info;
1853 count_p = &loc_h->count;
1854 sorted_count_p = &loc_h->sorted_count;
1855 size_p = &loc_h->size;
1858 count = *count_p;
1859 sorted_count = *sorted_count_p;
1860 size = *size_p;
1861 info = *info_p;
1862 if (create)
1864 /* When we create the array, we don't check for duplicates,
1865 except in the previously sorted section if one exists, and
1866 against the last inserted entry. This allows insertions to
1867 be fast. */
1868 if (info)
1870 if (sorted_count)
1872 /* Try bsearch first on the sorted section. */
1873 key.addend = addend;
1874 dyn_i = bsearch (&key, info, sorted_count,
1875 sizeof (*info), addend_compare);
1877 if (dyn_i)
1879 return dyn_i;
1883 /* Do a quick check for the last inserted entry. */
1884 dyn_i = info + count - 1;
1885 if (dyn_i->addend == addend)
1887 return dyn_i;
1891 if (size == 0)
1893 /* It is the very first element. We create the array of size
1894 1. */
1895 size = 1;
1896 amt = size * sizeof (*info);
1897 info = bfd_malloc (amt);
1899 else if (size <= count)
1901 /* We double the array size every time when we reach the
1902 size limit. */
1903 size += size;
1904 amt = size * sizeof (*info);
1905 info = bfd_realloc (info, amt);
1907 else
1908 goto has_space;
1910 if (info == NULL)
1911 return NULL;
1912 *size_p = size;
1913 *info_p = info;
1915 has_space:
1916 /* Append the new one to the array. */
1917 dyn_i = info + count;
1918 memset (dyn_i, 0, sizeof (*dyn_i));
1919 dyn_i->got_offset = (bfd_vma) -1;
1920 dyn_i->addend = addend;
1922 /* We increment count only since the new ones are unsorted and
1923 may have duplicate. */
1924 (*count_p)++;
1926 else
1928 /* It is a lookup without insertion. Sort array if part of the
1929 array isn't sorted. */
1930 if (count != sorted_count)
1932 count = sort_dyn_sym_info (info, count);
1933 *count_p = count;
1934 *sorted_count_p = count;
1937 /* Free unused memory. */
1938 if (size != count)
1940 amt = count * sizeof (*info);
1941 info = bfd_malloc (amt);
1942 if (info != NULL)
1944 memcpy (info, *info_p, amt);
1945 free (*info_p);
1946 *size_p = count;
1947 *info_p = info;
1951 key.addend = addend;
1952 dyn_i = bsearch (&key, info, count,
1953 sizeof (*info), addend_compare);
1956 return dyn_i;
1959 static asection *
1960 get_got (bfd *abfd, struct bfd_link_info *info,
1961 struct elfNN_ia64_link_hash_table *ia64_info)
1963 asection *got;
1964 bfd *dynobj;
1966 got = ia64_info->root.sgot;
1967 if (!got)
1969 flagword flags;
1971 dynobj = ia64_info->root.dynobj;
1972 if (!dynobj)
1973 ia64_info->root.dynobj = dynobj = abfd;
1974 if (!_bfd_elf_create_got_section (dynobj, info))
1975 return NULL;
1977 got = ia64_info->root.sgot;
1979 /* The .got section is always aligned at 8 bytes. */
1980 if (!bfd_set_section_alignment (abfd, got, 3))
1981 return NULL;
1983 flags = bfd_get_section_flags (abfd, got);
1984 if (! bfd_set_section_flags (abfd, got, SEC_SMALL_DATA | flags))
1985 return NULL;
1988 return got;
1991 /* Create function descriptor section (.opd). This section is called .opd
1992 because it contains "official procedure descriptors". The "official"
1993 refers to the fact that these descriptors are used when taking the address
1994 of a procedure, thus ensuring a unique address for each procedure. */
1996 static asection *
1997 get_fptr (bfd *abfd, struct bfd_link_info *info,
1998 struct elfNN_ia64_link_hash_table *ia64_info)
2000 asection *fptr;
2001 bfd *dynobj;
2003 fptr = ia64_info->fptr_sec;
2004 if (!fptr)
2006 dynobj = ia64_info->root.dynobj;
2007 if (!dynobj)
2008 ia64_info->root.dynobj = dynobj = abfd;
2010 fptr = bfd_make_section_anyway_with_flags (dynobj, ".opd",
2011 (SEC_ALLOC
2012 | SEC_LOAD
2013 | SEC_HAS_CONTENTS
2014 | SEC_IN_MEMORY
2015 | (bfd_link_pie (info)
2016 ? 0 : SEC_READONLY)
2017 | SEC_LINKER_CREATED));
2018 if (!fptr
2019 || !bfd_set_section_alignment (abfd, fptr, 4))
2021 BFD_ASSERT (0);
2022 return NULL;
2025 ia64_info->fptr_sec = fptr;
2027 if (bfd_link_pie (info))
2029 asection *fptr_rel;
2030 fptr_rel = bfd_make_section_anyway_with_flags (dynobj, ".rela.opd",
2031 (SEC_ALLOC | SEC_LOAD
2032 | SEC_HAS_CONTENTS
2033 | SEC_IN_MEMORY
2034 | SEC_LINKER_CREATED
2035 | SEC_READONLY));
2036 if (fptr_rel == NULL
2037 || !bfd_set_section_alignment (abfd, fptr_rel,
2038 LOG_SECTION_ALIGN))
2040 BFD_ASSERT (0);
2041 return NULL;
2044 ia64_info->rel_fptr_sec = fptr_rel;
2048 return fptr;
2051 static asection *
2052 get_pltoff (bfd *abfd, struct bfd_link_info *info ATTRIBUTE_UNUSED,
2053 struct elfNN_ia64_link_hash_table *ia64_info)
2055 asection *pltoff;
2056 bfd *dynobj;
2058 pltoff = ia64_info->pltoff_sec;
2059 if (!pltoff)
2061 dynobj = ia64_info->root.dynobj;
2062 if (!dynobj)
2063 ia64_info->root.dynobj = dynobj = abfd;
2065 pltoff = bfd_make_section_anyway_with_flags (dynobj,
2066 ELF_STRING_ia64_pltoff,
2067 (SEC_ALLOC
2068 | SEC_LOAD
2069 | SEC_HAS_CONTENTS
2070 | SEC_IN_MEMORY
2071 | SEC_SMALL_DATA
2072 | SEC_LINKER_CREATED));
2073 if (!pltoff
2074 || !bfd_set_section_alignment (abfd, pltoff, 4))
2076 BFD_ASSERT (0);
2077 return NULL;
2080 ia64_info->pltoff_sec = pltoff;
2083 return pltoff;
2086 static asection *
2087 get_reloc_section (bfd *abfd,
2088 struct elfNN_ia64_link_hash_table *ia64_info,
2089 asection *sec, bfd_boolean create)
2091 const char *srel_name;
2092 asection *srel;
2093 bfd *dynobj;
2095 srel_name = (bfd_elf_string_from_elf_section
2096 (abfd, elf_elfheader(abfd)->e_shstrndx,
2097 _bfd_elf_single_rel_hdr (sec)->sh_name));
2098 if (srel_name == NULL)
2099 return NULL;
2101 dynobj = ia64_info->root.dynobj;
2102 if (!dynobj)
2103 ia64_info->root.dynobj = dynobj = abfd;
2105 srel = bfd_get_linker_section (dynobj, srel_name);
2106 if (srel == NULL && create)
2108 srel = bfd_make_section_anyway_with_flags (dynobj, srel_name,
2109 (SEC_ALLOC | SEC_LOAD
2110 | SEC_HAS_CONTENTS
2111 | SEC_IN_MEMORY
2112 | SEC_LINKER_CREATED
2113 | SEC_READONLY));
2114 if (srel == NULL
2115 || !bfd_set_section_alignment (dynobj, srel,
2116 LOG_SECTION_ALIGN))
2117 return NULL;
2120 return srel;
2123 static bfd_boolean
2124 count_dyn_reloc (bfd *abfd, struct elfNN_ia64_dyn_sym_info *dyn_i,
2125 asection *srel, int type, bfd_boolean reltext)
2127 struct elfNN_ia64_dyn_reloc_entry *rent;
2129 for (rent = dyn_i->reloc_entries; rent; rent = rent->next)
2130 if (rent->srel == srel && rent->type == type)
2131 break;
2133 if (!rent)
2135 rent = ((struct elfNN_ia64_dyn_reloc_entry *)
2136 bfd_alloc (abfd, (bfd_size_type) sizeof (*rent)));
2137 if (!rent)
2138 return FALSE;
2140 rent->next = dyn_i->reloc_entries;
2141 rent->srel = srel;
2142 rent->type = type;
2143 rent->count = 0;
2144 dyn_i->reloc_entries = rent;
2146 rent->reltext = reltext;
2147 rent->count++;
2149 return TRUE;
2152 static bfd_boolean
2153 elfNN_ia64_check_relocs (bfd *abfd, struct bfd_link_info *info,
2154 asection *sec,
2155 const Elf_Internal_Rela *relocs)
2157 struct elfNN_ia64_link_hash_table *ia64_info;
2158 const Elf_Internal_Rela *relend;
2159 Elf_Internal_Shdr *symtab_hdr;
2160 const Elf_Internal_Rela *rel;
2161 asection *got, *fptr, *srel, *pltoff;
2162 enum {
2163 NEED_GOT = 1,
2164 NEED_GOTX = 2,
2165 NEED_FPTR = 4,
2166 NEED_PLTOFF = 8,
2167 NEED_MIN_PLT = 16,
2168 NEED_FULL_PLT = 32,
2169 NEED_DYNREL = 64,
2170 NEED_LTOFF_FPTR = 128,
2171 NEED_TPREL = 256,
2172 NEED_DTPMOD = 512,
2173 NEED_DTPREL = 1024
2175 int need_entry;
2176 struct elf_link_hash_entry *h;
2177 unsigned long r_symndx;
2178 bfd_boolean maybe_dynamic;
2180 if (bfd_link_relocatable (info))
2181 return TRUE;
2183 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2184 ia64_info = elfNN_ia64_hash_table (info);
2185 if (ia64_info == NULL)
2186 return FALSE;
2188 got = fptr = srel = pltoff = NULL;
2190 relend = relocs + sec->reloc_count;
2192 /* We scan relocations first to create dynamic relocation arrays. We
2193 modified get_dyn_sym_info to allow fast insertion and support fast
2194 lookup in the next loop. */
2195 for (rel = relocs; rel < relend; ++rel)
2197 r_symndx = ELFNN_R_SYM (rel->r_info);
2198 if (r_symndx >= symtab_hdr->sh_info)
2200 long indx = r_symndx - symtab_hdr->sh_info;
2201 h = elf_sym_hashes (abfd)[indx];
2202 while (h->root.type == bfd_link_hash_indirect
2203 || h->root.type == bfd_link_hash_warning)
2204 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2206 else
2207 h = NULL;
2209 if (h && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
2210 continue;
2212 /* We can only get preliminary data on whether a symbol is
2213 locally or externally defined, as not all of the input files
2214 have yet been processed. Do something with what we know, as
2215 this may help reduce memory usage and processing time later. */
2216 maybe_dynamic = (h && ((!bfd_link_executable (info)
2217 && (!SYMBOLIC_BIND (info, h)
2218 || info->unresolved_syms_in_shared_libs == RM_IGNORE))
2219 || !h->def_regular
2220 || h->root.type == bfd_link_hash_defweak));
2222 need_entry = 0;
2223 switch (ELFNN_R_TYPE (rel->r_info))
2225 case R_IA64_TPREL64MSB:
2226 case R_IA64_TPREL64LSB:
2227 if (bfd_link_pic (info) || maybe_dynamic)
2228 need_entry = NEED_DYNREL;
2229 break;
2231 case R_IA64_LTOFF_TPREL22:
2232 need_entry = NEED_TPREL;
2233 if (bfd_link_pic (info))
2234 info->flags |= DF_STATIC_TLS;
2235 break;
2237 case R_IA64_DTPREL32MSB:
2238 case R_IA64_DTPREL32LSB:
2239 case R_IA64_DTPREL64MSB:
2240 case R_IA64_DTPREL64LSB:
2241 if (bfd_link_pic (info) || maybe_dynamic)
2242 need_entry = NEED_DYNREL;
2243 break;
2245 case R_IA64_LTOFF_DTPREL22:
2246 need_entry = NEED_DTPREL;
2247 break;
2249 case R_IA64_DTPMOD64MSB:
2250 case R_IA64_DTPMOD64LSB:
2251 if (bfd_link_pic (info) || maybe_dynamic)
2252 need_entry = NEED_DYNREL;
2253 break;
2255 case R_IA64_LTOFF_DTPMOD22:
2256 need_entry = NEED_DTPMOD;
2257 break;
2259 case R_IA64_LTOFF_FPTR22:
2260 case R_IA64_LTOFF_FPTR64I:
2261 case R_IA64_LTOFF_FPTR32MSB:
2262 case R_IA64_LTOFF_FPTR32LSB:
2263 case R_IA64_LTOFF_FPTR64MSB:
2264 case R_IA64_LTOFF_FPTR64LSB:
2265 need_entry = NEED_FPTR | NEED_GOT | NEED_LTOFF_FPTR;
2266 break;
2268 case R_IA64_FPTR64I:
2269 case R_IA64_FPTR32MSB:
2270 case R_IA64_FPTR32LSB:
2271 case R_IA64_FPTR64MSB:
2272 case R_IA64_FPTR64LSB:
2273 if (bfd_link_pic (info) || h)
2274 need_entry = NEED_FPTR | NEED_DYNREL;
2275 else
2276 need_entry = NEED_FPTR;
2277 break;
2279 case R_IA64_LTOFF22:
2280 case R_IA64_LTOFF64I:
2281 need_entry = NEED_GOT;
2282 break;
2284 case R_IA64_LTOFF22X:
2285 need_entry = NEED_GOTX;
2286 break;
2288 case R_IA64_PLTOFF22:
2289 case R_IA64_PLTOFF64I:
2290 case R_IA64_PLTOFF64MSB:
2291 case R_IA64_PLTOFF64LSB:
2292 need_entry = NEED_PLTOFF;
2293 if (h)
2295 if (maybe_dynamic)
2296 need_entry |= NEED_MIN_PLT;
2298 else
2300 (*info->callbacks->warning)
2301 (info, _("@pltoff reloc against local symbol"), 0,
2302 abfd, 0, (bfd_vma) 0);
2304 break;
2306 case R_IA64_PCREL21B:
2307 case R_IA64_PCREL60B:
2308 /* Depending on where this symbol is defined, we may or may not
2309 need a full plt entry. Only skip if we know we'll not need
2310 the entry -- static or symbolic, and the symbol definition
2311 has already been seen. */
2312 if (maybe_dynamic && rel->r_addend == 0)
2313 need_entry = NEED_FULL_PLT;
2314 break;
2316 case R_IA64_IMM14:
2317 case R_IA64_IMM22:
2318 case R_IA64_IMM64:
2319 case R_IA64_DIR32MSB:
2320 case R_IA64_DIR32LSB:
2321 case R_IA64_DIR64MSB:
2322 case R_IA64_DIR64LSB:
2323 /* Shared objects will always need at least a REL relocation. */
2324 if (bfd_link_pic (info) || maybe_dynamic)
2325 need_entry = NEED_DYNREL;
2326 break;
2328 case R_IA64_IPLTMSB:
2329 case R_IA64_IPLTLSB:
2330 /* Shared objects will always need at least a REL relocation. */
2331 if (bfd_link_pic (info) || maybe_dynamic)
2332 need_entry = NEED_DYNREL;
2333 break;
2335 case R_IA64_PCREL22:
2336 case R_IA64_PCREL64I:
2337 case R_IA64_PCREL32MSB:
2338 case R_IA64_PCREL32LSB:
2339 case R_IA64_PCREL64MSB:
2340 case R_IA64_PCREL64LSB:
2341 if (maybe_dynamic)
2342 need_entry = NEED_DYNREL;
2343 break;
2346 if (!need_entry)
2347 continue;
2349 if ((need_entry & NEED_FPTR) != 0
2350 && rel->r_addend)
2352 (*info->callbacks->warning)
2353 (info, _("non-zero addend in @fptr reloc"), 0,
2354 abfd, 0, (bfd_vma) 0);
2357 if (get_dyn_sym_info (ia64_info, h, abfd, rel, TRUE) == NULL)
2358 return FALSE;
2361 /* Now, we only do lookup without insertion, which is very fast
2362 with the modified get_dyn_sym_info. */
2363 for (rel = relocs; rel < relend; ++rel)
2365 struct elfNN_ia64_dyn_sym_info *dyn_i;
2366 int dynrel_type = R_IA64_NONE;
2368 r_symndx = ELFNN_R_SYM (rel->r_info);
2369 if (r_symndx >= symtab_hdr->sh_info)
2371 /* We're dealing with a global symbol -- find its hash entry
2372 and mark it as being referenced. */
2373 long indx = r_symndx - symtab_hdr->sh_info;
2374 h = elf_sym_hashes (abfd)[indx];
2375 while (h->root.type == bfd_link_hash_indirect
2376 || h->root.type == bfd_link_hash_warning)
2377 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2379 /* PR15323, ref flags aren't set for references in the same
2380 object. */
2381 h->ref_regular = 1;
2383 else
2384 h = NULL;
2386 if (h && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
2387 continue;
2389 /* We can only get preliminary data on whether a symbol is
2390 locally or externally defined, as not all of the input files
2391 have yet been processed. Do something with what we know, as
2392 this may help reduce memory usage and processing time later. */
2393 maybe_dynamic = (h && ((!bfd_link_executable (info)
2394 && (!SYMBOLIC_BIND (info, h)
2395 || info->unresolved_syms_in_shared_libs == RM_IGNORE))
2396 || !h->def_regular
2397 || h->root.type == bfd_link_hash_defweak));
2399 need_entry = 0;
2400 switch (ELFNN_R_TYPE (rel->r_info))
2402 case R_IA64_TPREL64MSB:
2403 case R_IA64_TPREL64LSB:
2404 if (bfd_link_pic (info) || maybe_dynamic)
2405 need_entry = NEED_DYNREL;
2406 dynrel_type = R_IA64_TPREL64LSB;
2407 if (bfd_link_pic (info))
2408 info->flags |= DF_STATIC_TLS;
2409 break;
2411 case R_IA64_LTOFF_TPREL22:
2412 need_entry = NEED_TPREL;
2413 if (bfd_link_pic (info))
2414 info->flags |= DF_STATIC_TLS;
2415 break;
2417 case R_IA64_DTPREL32MSB:
2418 case R_IA64_DTPREL32LSB:
2419 case R_IA64_DTPREL64MSB:
2420 case R_IA64_DTPREL64LSB:
2421 if (bfd_link_pic (info) || maybe_dynamic)
2422 need_entry = NEED_DYNREL;
2423 dynrel_type = R_IA64_DTPRELNNLSB;
2424 break;
2426 case R_IA64_LTOFF_DTPREL22:
2427 need_entry = NEED_DTPREL;
2428 break;
2430 case R_IA64_DTPMOD64MSB:
2431 case R_IA64_DTPMOD64LSB:
2432 if (bfd_link_pic (info) || maybe_dynamic)
2433 need_entry = NEED_DYNREL;
2434 dynrel_type = R_IA64_DTPMOD64LSB;
2435 break;
2437 case R_IA64_LTOFF_DTPMOD22:
2438 need_entry = NEED_DTPMOD;
2439 break;
2441 case R_IA64_LTOFF_FPTR22:
2442 case R_IA64_LTOFF_FPTR64I:
2443 case R_IA64_LTOFF_FPTR32MSB:
2444 case R_IA64_LTOFF_FPTR32LSB:
2445 case R_IA64_LTOFF_FPTR64MSB:
2446 case R_IA64_LTOFF_FPTR64LSB:
2447 need_entry = NEED_FPTR | NEED_GOT | NEED_LTOFF_FPTR;
2448 break;
2450 case R_IA64_FPTR64I:
2451 case R_IA64_FPTR32MSB:
2452 case R_IA64_FPTR32LSB:
2453 case R_IA64_FPTR64MSB:
2454 case R_IA64_FPTR64LSB:
2455 if (bfd_link_pic (info) || h)
2456 need_entry = NEED_FPTR | NEED_DYNREL;
2457 else
2458 need_entry = NEED_FPTR;
2459 dynrel_type = R_IA64_FPTRNNLSB;
2460 break;
2462 case R_IA64_LTOFF22:
2463 case R_IA64_LTOFF64I:
2464 need_entry = NEED_GOT;
2465 break;
2467 case R_IA64_LTOFF22X:
2468 need_entry = NEED_GOTX;
2469 break;
2471 case R_IA64_PLTOFF22:
2472 case R_IA64_PLTOFF64I:
2473 case R_IA64_PLTOFF64MSB:
2474 case R_IA64_PLTOFF64LSB:
2475 need_entry = NEED_PLTOFF;
2476 if (h)
2478 if (maybe_dynamic)
2479 need_entry |= NEED_MIN_PLT;
2481 break;
2483 case R_IA64_PCREL21B:
2484 case R_IA64_PCREL60B:
2485 /* Depending on where this symbol is defined, we may or may not
2486 need a full plt entry. Only skip if we know we'll not need
2487 the entry -- static or symbolic, and the symbol definition
2488 has already been seen. */
2489 if (maybe_dynamic && rel->r_addend == 0)
2490 need_entry = NEED_FULL_PLT;
2491 break;
2493 case R_IA64_IMM14:
2494 case R_IA64_IMM22:
2495 case R_IA64_IMM64:
2496 case R_IA64_DIR32MSB:
2497 case R_IA64_DIR32LSB:
2498 case R_IA64_DIR64MSB:
2499 case R_IA64_DIR64LSB:
2500 /* Shared objects will always need at least a REL relocation. */
2501 if (bfd_link_pic (info) || maybe_dynamic)
2502 need_entry = NEED_DYNREL;
2503 dynrel_type = R_IA64_DIRNNLSB;
2504 break;
2506 case R_IA64_IPLTMSB:
2507 case R_IA64_IPLTLSB:
2508 /* Shared objects will always need at least a REL relocation. */
2509 if (bfd_link_pic (info) || maybe_dynamic)
2510 need_entry = NEED_DYNREL;
2511 dynrel_type = R_IA64_IPLTLSB;
2512 break;
2514 case R_IA64_PCREL22:
2515 case R_IA64_PCREL64I:
2516 case R_IA64_PCREL32MSB:
2517 case R_IA64_PCREL32LSB:
2518 case R_IA64_PCREL64MSB:
2519 case R_IA64_PCREL64LSB:
2520 if (maybe_dynamic)
2521 need_entry = NEED_DYNREL;
2522 dynrel_type = R_IA64_PCRELNNLSB;
2523 break;
2526 if (!need_entry)
2527 continue;
2529 dyn_i = get_dyn_sym_info (ia64_info, h, abfd, rel, FALSE);
2531 /* Record whether or not this is a local symbol. */
2532 dyn_i->h = h;
2534 /* Create what's needed. */
2535 if (need_entry & (NEED_GOT | NEED_GOTX | NEED_TPREL
2536 | NEED_DTPMOD | NEED_DTPREL))
2538 if (!got)
2540 got = get_got (abfd, info, ia64_info);
2541 if (!got)
2542 return FALSE;
2544 if (need_entry & NEED_GOT)
2545 dyn_i->want_got = 1;
2546 if (need_entry & NEED_GOTX)
2547 dyn_i->want_gotx = 1;
2548 if (need_entry & NEED_TPREL)
2549 dyn_i->want_tprel = 1;
2550 if (need_entry & NEED_DTPMOD)
2551 dyn_i->want_dtpmod = 1;
2552 if (need_entry & NEED_DTPREL)
2553 dyn_i->want_dtprel = 1;
2555 if (need_entry & NEED_FPTR)
2557 if (!fptr)
2559 fptr = get_fptr (abfd, info, ia64_info);
2560 if (!fptr)
2561 return FALSE;
2564 /* FPTRs for shared libraries are allocated by the dynamic
2565 linker. Make sure this local symbol will appear in the
2566 dynamic symbol table. */
2567 if (!h && bfd_link_pic (info))
2569 if (! (bfd_elf_link_record_local_dynamic_symbol
2570 (info, abfd, (long) r_symndx)))
2571 return FALSE;
2574 dyn_i->want_fptr = 1;
2576 if (need_entry & NEED_LTOFF_FPTR)
2577 dyn_i->want_ltoff_fptr = 1;
2578 if (need_entry & (NEED_MIN_PLT | NEED_FULL_PLT))
2580 if (!ia64_info->root.dynobj)
2581 ia64_info->root.dynobj = abfd;
2582 h->needs_plt = 1;
2583 dyn_i->want_plt = 1;
2585 if (need_entry & NEED_FULL_PLT)
2586 dyn_i->want_plt2 = 1;
2587 if (need_entry & NEED_PLTOFF)
2589 /* This is needed here, in case @pltoff is used in a non-shared
2590 link. */
2591 if (!pltoff)
2593 pltoff = get_pltoff (abfd, info, ia64_info);
2594 if (!pltoff)
2595 return FALSE;
2598 dyn_i->want_pltoff = 1;
2600 if ((need_entry & NEED_DYNREL) && (sec->flags & SEC_ALLOC))
2602 if (!srel)
2604 srel = get_reloc_section (abfd, ia64_info, sec, TRUE);
2605 if (!srel)
2606 return FALSE;
2608 if (!count_dyn_reloc (abfd, dyn_i, srel, dynrel_type,
2609 (sec->flags & SEC_READONLY) != 0))
2610 return FALSE;
2614 return TRUE;
2617 /* For cleanliness, and potentially faster dynamic loading, allocate
2618 external GOT entries first. */
2620 static bfd_boolean
2621 allocate_global_data_got (struct elfNN_ia64_dyn_sym_info *dyn_i,
2622 void * data)
2624 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2626 if ((dyn_i->want_got || dyn_i->want_gotx)
2627 && ! dyn_i->want_fptr
2628 && elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0))
2630 dyn_i->got_offset = x->ofs;
2631 x->ofs += 8;
2633 if (dyn_i->want_tprel)
2635 dyn_i->tprel_offset = x->ofs;
2636 x->ofs += 8;
2638 if (dyn_i->want_dtpmod)
2640 if (elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0))
2642 dyn_i->dtpmod_offset = x->ofs;
2643 x->ofs += 8;
2645 else
2647 struct elfNN_ia64_link_hash_table *ia64_info;
2649 ia64_info = elfNN_ia64_hash_table (x->info);
2650 if (ia64_info == NULL)
2651 return FALSE;
2653 if (ia64_info->self_dtpmod_offset == (bfd_vma) -1)
2655 ia64_info->self_dtpmod_offset = x->ofs;
2656 x->ofs += 8;
2658 dyn_i->dtpmod_offset = ia64_info->self_dtpmod_offset;
2661 if (dyn_i->want_dtprel)
2663 dyn_i->dtprel_offset = x->ofs;
2664 x->ofs += 8;
2666 return TRUE;
2669 /* Next, allocate all the GOT entries used by LTOFF_FPTR relocs. */
2671 static bfd_boolean
2672 allocate_global_fptr_got (struct elfNN_ia64_dyn_sym_info *dyn_i,
2673 void * data)
2675 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2677 if (dyn_i->want_got
2678 && dyn_i->want_fptr
2679 && elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, R_IA64_FPTRNNLSB))
2681 dyn_i->got_offset = x->ofs;
2682 x->ofs += 8;
2684 return TRUE;
2687 /* Lastly, allocate all the GOT entries for local data. */
2689 static bfd_boolean
2690 allocate_local_got (struct elfNN_ia64_dyn_sym_info *dyn_i,
2691 void * data)
2693 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2695 if ((dyn_i->want_got || dyn_i->want_gotx)
2696 && !elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0))
2698 dyn_i->got_offset = x->ofs;
2699 x->ofs += 8;
2701 return TRUE;
2704 /* Search for the index of a global symbol in it's defining object file. */
2706 static long
2707 global_sym_index (struct elf_link_hash_entry *h)
2709 struct elf_link_hash_entry **p;
2710 bfd *obj;
2712 BFD_ASSERT (h->root.type == bfd_link_hash_defined
2713 || h->root.type == bfd_link_hash_defweak);
2715 obj = h->root.u.def.section->owner;
2716 for (p = elf_sym_hashes (obj); *p != h; ++p)
2717 continue;
2719 return p - elf_sym_hashes (obj) + elf_tdata (obj)->symtab_hdr.sh_info;
2722 /* Allocate function descriptors. We can do these for every function
2723 in a main executable that is not exported. */
2725 static bfd_boolean
2726 allocate_fptr (struct elfNN_ia64_dyn_sym_info *dyn_i, void * data)
2728 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2730 if (dyn_i->want_fptr)
2732 struct elf_link_hash_entry *h = dyn_i->h;
2734 if (h)
2735 while (h->root.type == bfd_link_hash_indirect
2736 || h->root.type == bfd_link_hash_warning)
2737 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2739 if (!bfd_link_executable (x->info)
2740 && (!h
2741 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2742 && !UNDEFWEAK_NO_DYNAMIC_RELOC (x->info, h))
2743 || (h->root.type != bfd_link_hash_undefweak
2744 && h->root.type != bfd_link_hash_undefined)))
2746 if (h && h->dynindx == -1)
2748 BFD_ASSERT ((h->root.type == bfd_link_hash_defined)
2749 || (h->root.type == bfd_link_hash_defweak));
2751 if (!bfd_elf_link_record_local_dynamic_symbol
2752 (x->info, h->root.u.def.section->owner,
2753 global_sym_index (h)))
2754 return FALSE;
2757 dyn_i->want_fptr = 0;
2759 else if (h == NULL || h->dynindx == -1)
2761 dyn_i->fptr_offset = x->ofs;
2762 x->ofs += 16;
2764 else
2765 dyn_i->want_fptr = 0;
2767 return TRUE;
2770 /* Allocate all the minimal PLT entries. */
2772 static bfd_boolean
2773 allocate_plt_entries (struct elfNN_ia64_dyn_sym_info *dyn_i,
2774 void * data)
2776 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2778 if (dyn_i->want_plt)
2780 struct elf_link_hash_entry *h = dyn_i->h;
2782 if (h)
2783 while (h->root.type == bfd_link_hash_indirect
2784 || h->root.type == bfd_link_hash_warning)
2785 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2787 /* ??? Versioned symbols seem to lose NEEDS_PLT. */
2788 if (elfNN_ia64_dynamic_symbol_p (h, x->info, 0))
2790 bfd_size_type offset = x->ofs;
2791 if (offset == 0)
2792 offset = PLT_HEADER_SIZE;
2793 dyn_i->plt_offset = offset;
2794 x->ofs = offset + PLT_MIN_ENTRY_SIZE;
2796 dyn_i->want_pltoff = 1;
2798 else
2800 dyn_i->want_plt = 0;
2801 dyn_i->want_plt2 = 0;
2804 return TRUE;
2807 /* Allocate all the full PLT entries. */
2809 static bfd_boolean
2810 allocate_plt2_entries (struct elfNN_ia64_dyn_sym_info *dyn_i,
2811 void * data)
2813 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2815 if (dyn_i->want_plt2)
2817 struct elf_link_hash_entry *h = dyn_i->h;
2818 bfd_size_type ofs = x->ofs;
2820 dyn_i->plt2_offset = ofs;
2821 x->ofs = ofs + PLT_FULL_ENTRY_SIZE;
2823 while (h->root.type == bfd_link_hash_indirect
2824 || h->root.type == bfd_link_hash_warning)
2825 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2826 dyn_i->h->plt.offset = ofs;
2828 return TRUE;
2831 /* Allocate all the PLTOFF entries requested by relocations and
2832 plt entries. We can't share space with allocated FPTR entries,
2833 because the latter are not necessarily addressable by the GP.
2834 ??? Relaxation might be able to determine that they are. */
2836 static bfd_boolean
2837 allocate_pltoff_entries (struct elfNN_ia64_dyn_sym_info *dyn_i,
2838 void * data)
2840 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2842 if (dyn_i->want_pltoff)
2844 dyn_i->pltoff_offset = x->ofs;
2845 x->ofs += 16;
2847 return TRUE;
2850 /* Allocate dynamic relocations for those symbols that turned out
2851 to be dynamic. */
2853 static bfd_boolean
2854 allocate_dynrel_entries (struct elfNN_ia64_dyn_sym_info *dyn_i,
2855 void * data)
2857 struct elfNN_ia64_allocate_data *x = (struct elfNN_ia64_allocate_data *)data;
2858 struct elfNN_ia64_link_hash_table *ia64_info;
2859 struct elfNN_ia64_dyn_reloc_entry *rent;
2860 bfd_boolean dynamic_symbol, shared, resolved_zero;
2862 ia64_info = elfNN_ia64_hash_table (x->info);
2863 if (ia64_info == NULL)
2864 return FALSE;
2866 /* Note that this can't be used in relation to FPTR relocs below. */
2867 dynamic_symbol = elfNN_ia64_dynamic_symbol_p (dyn_i->h, x->info, 0);
2869 shared = bfd_link_pic (x->info);
2870 resolved_zero = (dyn_i->h
2871 && UNDEFWEAK_NO_DYNAMIC_RELOC (x->info,
2872 dyn_i->h));
2874 /* Take care of the GOT and PLT relocations. */
2876 if ((!resolved_zero
2877 && (dynamic_symbol || shared)
2878 && (dyn_i->want_got || dyn_i->want_gotx))
2879 || (dyn_i->want_ltoff_fptr
2880 && dyn_i->h
2881 && dyn_i->h->dynindx != -1))
2883 if (!dyn_i->want_ltoff_fptr
2884 || !bfd_link_pie (x->info)
2885 || dyn_i->h == NULL
2886 || dyn_i->h->root.type != bfd_link_hash_undefweak)
2887 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
2889 if ((dynamic_symbol || shared) && dyn_i->want_tprel)
2890 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
2891 if (dynamic_symbol && dyn_i->want_dtpmod)
2892 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
2893 if (dynamic_symbol && dyn_i->want_dtprel)
2894 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
2896 if (x->only_got)
2897 return TRUE;
2899 if (ia64_info->rel_fptr_sec && dyn_i->want_fptr)
2901 if (dyn_i->h == NULL || dyn_i->h->root.type != bfd_link_hash_undefweak)
2902 ia64_info->rel_fptr_sec->size += sizeof (ElfNN_External_Rela);
2905 if (!resolved_zero && dyn_i->want_pltoff)
2907 bfd_size_type t = 0;
2909 /* Dynamic symbols get one IPLT relocation. Local symbols in
2910 shared libraries get two REL relocations. Local symbols in
2911 main applications get nothing. */
2912 if (dynamic_symbol)
2913 t = sizeof (ElfNN_External_Rela);
2914 else if (shared)
2915 t = 2 * sizeof (ElfNN_External_Rela);
2917 ia64_info->rel_pltoff_sec->size += t;
2920 /* Take care of the normal data relocations. */
2922 for (rent = dyn_i->reloc_entries; rent; rent = rent->next)
2924 int count = rent->count;
2926 switch (rent->type)
2928 case R_IA64_FPTR32LSB:
2929 case R_IA64_FPTR64LSB:
2930 /* Allocate one iff !want_fptr and not PIE, which by this point
2931 will be true only if we're actually allocating one statically
2932 in the main executable. Position independent executables
2933 need a relative reloc. */
2934 if (dyn_i->want_fptr && !bfd_link_pie (x->info))
2935 continue;
2936 break;
2937 case R_IA64_PCREL32LSB:
2938 case R_IA64_PCREL64LSB:
2939 if (!dynamic_symbol)
2940 continue;
2941 break;
2942 case R_IA64_DIR32LSB:
2943 case R_IA64_DIR64LSB:
2944 if (!dynamic_symbol && !shared)
2945 continue;
2946 break;
2947 case R_IA64_IPLTLSB:
2948 if (!dynamic_symbol && !shared)
2949 continue;
2950 /* Use two REL relocations for IPLT relocations
2951 against local symbols. */
2952 if (!dynamic_symbol)
2953 count *= 2;
2954 break;
2955 case R_IA64_DTPREL32LSB:
2956 case R_IA64_TPREL64LSB:
2957 case R_IA64_DTPREL64LSB:
2958 case R_IA64_DTPMOD64LSB:
2959 break;
2960 default:
2961 abort ();
2963 if (rent->reltext)
2964 ia64_info->reltext = 1;
2965 rent->srel->size += sizeof (ElfNN_External_Rela) * count;
2968 return TRUE;
2971 static bfd_boolean
2972 elfNN_ia64_adjust_dynamic_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
2973 struct elf_link_hash_entry *h)
2975 /* ??? Undefined symbols with PLT entries should be re-defined
2976 to be the PLT entry. */
2978 /* If this is a weak symbol, and there is a real definition, the
2979 processor independent code will have arranged for us to see the
2980 real definition first, and we can just use the same value. */
2981 if (h->is_weakalias)
2983 struct elf_link_hash_entry *def = weakdef (h);
2984 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2985 h->root.u.def.section = def->root.u.def.section;
2986 h->root.u.def.value = def->root.u.def.value;
2987 return TRUE;
2990 /* If this is a reference to a symbol defined by a dynamic object which
2991 is not a function, we might allocate the symbol in our .dynbss section
2992 and allocate a COPY dynamic relocation.
2994 But IA-64 code is canonically PIC, so as a rule we can avoid this sort
2995 of hackery. */
2997 return TRUE;
3000 static bfd_boolean
3001 elfNN_ia64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3002 struct bfd_link_info *info)
3004 struct elfNN_ia64_allocate_data data;
3005 struct elfNN_ia64_link_hash_table *ia64_info;
3006 asection *sec;
3007 bfd *dynobj;
3008 bfd_boolean relplt = FALSE;
3010 ia64_info = elfNN_ia64_hash_table (info);
3011 if (ia64_info == NULL)
3012 return FALSE;
3013 dynobj = ia64_info->root.dynobj;
3014 ia64_info->self_dtpmod_offset = (bfd_vma) -1;
3015 BFD_ASSERT(dynobj != NULL);
3016 data.info = info;
3018 /* Set the contents of the .interp section to the interpreter. */
3019 if (ia64_info->root.dynamic_sections_created
3020 && bfd_link_executable (info) && !info->nointerp)
3022 sec = bfd_get_linker_section (dynobj, ".interp");
3023 BFD_ASSERT (sec != NULL);
3024 sec->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
3025 sec->size = strlen (ELF_DYNAMIC_INTERPRETER) + 1;
3028 /* Allocate the GOT entries. */
3030 if (ia64_info->root.sgot)
3032 data.ofs = 0;
3033 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_data_got, &data);
3034 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_global_fptr_got, &data);
3035 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_local_got, &data);
3036 ia64_info->root.sgot->size = data.ofs;
3039 /* Allocate the FPTR entries. */
3041 if (ia64_info->fptr_sec)
3043 data.ofs = 0;
3044 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_fptr, &data);
3045 ia64_info->fptr_sec->size = data.ofs;
3048 /* Now that we've seen all of the input files, we can decide which
3049 symbols need plt entries. Allocate the minimal PLT entries first.
3050 We do this even though dynamic_sections_created may be FALSE, because
3051 this has the side-effect of clearing want_plt and want_plt2. */
3053 data.ofs = 0;
3054 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_plt_entries, &data);
3056 ia64_info->minplt_entries = 0;
3057 if (data.ofs)
3059 ia64_info->minplt_entries
3060 = (data.ofs - PLT_HEADER_SIZE) / PLT_MIN_ENTRY_SIZE;
3063 /* Align the pointer for the plt2 entries. */
3064 data.ofs = (data.ofs + 31) & (bfd_vma) -32;
3066 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_plt2_entries, &data);
3067 if (data.ofs != 0 || ia64_info->root.dynamic_sections_created)
3069 /* FIXME: we always reserve the memory for dynamic linker even if
3070 there are no PLT entries since dynamic linker may assume the
3071 reserved memory always exists. */
3073 BFD_ASSERT (ia64_info->root.dynamic_sections_created);
3075 ia64_info->root.splt->size = data.ofs;
3077 /* If we've got a .plt, we need some extra memory for the dynamic
3078 linker. We stuff these in .got.plt. */
3079 ia64_info->root.sgotplt->size = 8 * PLT_RESERVED_WORDS;
3082 /* Allocate the PLTOFF entries. */
3084 if (ia64_info->pltoff_sec)
3086 data.ofs = 0;
3087 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_pltoff_entries, &data);
3088 ia64_info->pltoff_sec->size = data.ofs;
3091 if (ia64_info->root.dynamic_sections_created)
3093 /* Allocate space for the dynamic relocations that turned out to be
3094 required. */
3096 if (bfd_link_pic (info) && ia64_info->self_dtpmod_offset != (bfd_vma) -1)
3097 ia64_info->root.srelgot->size += sizeof (ElfNN_External_Rela);
3098 data.only_got = FALSE;
3099 elfNN_ia64_dyn_sym_traverse (ia64_info, allocate_dynrel_entries, &data);
3102 /* We have now determined the sizes of the various dynamic sections.
3103 Allocate memory for them. */
3104 for (sec = dynobj->sections; sec != NULL; sec = sec->next)
3106 bfd_boolean strip;
3108 if (!(sec->flags & SEC_LINKER_CREATED))
3109 continue;
3111 /* If we don't need this section, strip it from the output file.
3112 There were several sections primarily related to dynamic
3113 linking that must be create before the linker maps input
3114 sections to output sections. The linker does that before
3115 bfd_elf_size_dynamic_sections is called, and it is that
3116 function which decides whether anything needs to go into
3117 these sections. */
3119 strip = (sec->size == 0);
3121 if (sec == ia64_info->root.sgot)
3122 strip = FALSE;
3123 else if (sec == ia64_info->root.srelgot)
3125 if (strip)
3126 ia64_info->root.srelgot = NULL;
3127 else
3128 /* We use the reloc_count field as a counter if we need to
3129 copy relocs into the output file. */
3130 sec->reloc_count = 0;
3132 else if (sec == ia64_info->fptr_sec)
3134 if (strip)
3135 ia64_info->fptr_sec = NULL;
3137 else if (sec == ia64_info->rel_fptr_sec)
3139 if (strip)
3140 ia64_info->rel_fptr_sec = NULL;
3141 else
3142 /* We use the reloc_count field as a counter if we need to
3143 copy relocs into the output file. */
3144 sec->reloc_count = 0;
3146 else if (sec == ia64_info->root.splt)
3148 if (strip)
3149 ia64_info->root.splt = NULL;
3151 else if (sec == ia64_info->pltoff_sec)
3153 if (strip)
3154 ia64_info->pltoff_sec = NULL;
3156 else if (sec == ia64_info->rel_pltoff_sec)
3158 if (strip)
3159 ia64_info->rel_pltoff_sec = NULL;
3160 else
3162 relplt = TRUE;
3163 /* We use the reloc_count field as a counter if we need to
3164 copy relocs into the output file. */
3165 sec->reloc_count = 0;
3168 else
3170 const char *name;
3172 /* It's OK to base decisions on the section name, because none
3173 of the dynobj section names depend upon the input files. */
3174 name = bfd_get_section_name (dynobj, sec);
3176 if (strcmp (name, ".got.plt") == 0)
3177 strip = FALSE;
3178 else if (CONST_STRNEQ (name, ".rel"))
3180 if (!strip)
3182 /* We use the reloc_count field as a counter if we need to
3183 copy relocs into the output file. */
3184 sec->reloc_count = 0;
3187 else
3188 continue;
3191 if (strip)
3192 sec->flags |= SEC_EXCLUDE;
3193 else
3195 /* Allocate memory for the section contents. */
3196 sec->contents = (bfd_byte *) bfd_zalloc (dynobj, sec->size);
3197 if (sec->contents == NULL && sec->size != 0)
3198 return FALSE;
3202 if (ia64_info->root.dynamic_sections_created)
3204 /* Add some entries to the .dynamic section. We fill in the values
3205 later (in finish_dynamic_sections) but we must add the entries now
3206 so that we get the correct size for the .dynamic section. */
3208 if (bfd_link_executable (info))
3210 /* The DT_DEBUG entry is filled in by the dynamic linker and used
3211 by the debugger. */
3212 #define add_dynamic_entry(TAG, VAL) \
3213 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3215 if (!add_dynamic_entry (DT_DEBUG, 0))
3216 return FALSE;
3219 if (!add_dynamic_entry (DT_IA_64_PLT_RESERVE, 0))
3220 return FALSE;
3221 if (!add_dynamic_entry (DT_PLTGOT, 0))
3222 return FALSE;
3224 if (relplt)
3226 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3227 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3228 || !add_dynamic_entry (DT_JMPREL, 0))
3229 return FALSE;
3232 if (!add_dynamic_entry (DT_RELA, 0)
3233 || !add_dynamic_entry (DT_RELASZ, 0)
3234 || !add_dynamic_entry (DT_RELAENT, sizeof (ElfNN_External_Rela)))
3235 return FALSE;
3237 if (ia64_info->reltext)
3239 if (!add_dynamic_entry (DT_TEXTREL, 0))
3240 return FALSE;
3241 info->flags |= DF_TEXTREL;
3245 /* ??? Perhaps force __gp local. */
3247 return TRUE;
3250 static void
3251 elfNN_ia64_install_dyn_reloc (bfd *abfd, struct bfd_link_info *info,
3252 asection *sec, asection *srel,
3253 bfd_vma offset, unsigned int type,
3254 long dynindx, bfd_vma addend)
3256 Elf_Internal_Rela outrel;
3257 bfd_byte *loc;
3259 BFD_ASSERT (dynindx != -1);
3260 outrel.r_info = ELFNN_R_INFO (dynindx, type);
3261 outrel.r_addend = addend;
3262 outrel.r_offset = _bfd_elf_section_offset (abfd, info, sec, offset);
3263 if (outrel.r_offset >= (bfd_vma) -2)
3265 /* Run for the hills. We shouldn't be outputting a relocation
3266 for this. So do what everyone else does and output a no-op. */
3267 outrel.r_info = ELFNN_R_INFO (0, R_IA64_NONE);
3268 outrel.r_addend = 0;
3269 outrel.r_offset = 0;
3271 else
3272 outrel.r_offset += sec->output_section->vma + sec->output_offset;
3274 loc = srel->contents;
3275 loc += srel->reloc_count++ * sizeof (ElfNN_External_Rela);
3276 bfd_elfNN_swap_reloca_out (abfd, &outrel, loc);
3277 BFD_ASSERT (sizeof (ElfNN_External_Rela) * srel->reloc_count <= srel->size);
3280 /* Store an entry for target address TARGET_ADDR in the linkage table
3281 and return the gp-relative address of the linkage table entry. */
3283 static bfd_vma
3284 set_got_entry (bfd *abfd, struct bfd_link_info *info,
3285 struct elfNN_ia64_dyn_sym_info *dyn_i,
3286 long dynindx, bfd_vma addend, bfd_vma value,
3287 unsigned int dyn_r_type)
3289 struct elfNN_ia64_link_hash_table *ia64_info;
3290 asection *got_sec;
3291 bfd_boolean done;
3292 bfd_vma got_offset;
3294 ia64_info = elfNN_ia64_hash_table (info);
3295 if (ia64_info == NULL)
3296 return 0;
3298 got_sec = ia64_info->root.sgot;
3300 switch (dyn_r_type)
3302 case R_IA64_TPREL64LSB:
3303 done = dyn_i->tprel_done;
3304 dyn_i->tprel_done = TRUE;
3305 got_offset = dyn_i->tprel_offset;
3306 break;
3307 case R_IA64_DTPMOD64LSB:
3308 if (dyn_i->dtpmod_offset != ia64_info->self_dtpmod_offset)
3310 done = dyn_i->dtpmod_done;
3311 dyn_i->dtpmod_done = TRUE;
3313 else
3315 done = ia64_info->self_dtpmod_done;
3316 ia64_info->self_dtpmod_done = TRUE;
3317 dynindx = 0;
3319 got_offset = dyn_i->dtpmod_offset;
3320 break;
3321 case R_IA64_DTPREL32LSB:
3322 case R_IA64_DTPREL64LSB:
3323 done = dyn_i->dtprel_done;
3324 dyn_i->dtprel_done = TRUE;
3325 got_offset = dyn_i->dtprel_offset;
3326 break;
3327 default:
3328 done = dyn_i->got_done;
3329 dyn_i->got_done = TRUE;
3330 got_offset = dyn_i->got_offset;
3331 break;
3334 BFD_ASSERT ((got_offset & 7) == 0);
3336 if (! done)
3338 /* Store the target address in the linkage table entry. */
3339 bfd_put_64 (abfd, value, got_sec->contents + got_offset);
3341 /* Install a dynamic relocation if needed. */
3342 if (((bfd_link_pic (info)
3343 && (!dyn_i->h
3344 || (ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT
3345 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, dyn_i->h))
3346 || dyn_i->h->root.type != bfd_link_hash_undefweak)
3347 && dyn_r_type != R_IA64_DTPREL32LSB
3348 && dyn_r_type != R_IA64_DTPREL64LSB)
3349 || elfNN_ia64_dynamic_symbol_p (dyn_i->h, info, dyn_r_type)
3350 || (dynindx != -1
3351 && (dyn_r_type == R_IA64_FPTR32LSB
3352 || dyn_r_type == R_IA64_FPTR64LSB)))
3353 && (!dyn_i->want_ltoff_fptr
3354 || !bfd_link_pie (info)
3355 || !dyn_i->h
3356 || dyn_i->h->root.type != bfd_link_hash_undefweak))
3358 if (dynindx == -1
3359 && dyn_r_type != R_IA64_TPREL64LSB
3360 && dyn_r_type != R_IA64_DTPMOD64LSB
3361 && dyn_r_type != R_IA64_DTPREL32LSB
3362 && dyn_r_type != R_IA64_DTPREL64LSB)
3364 dyn_r_type = R_IA64_RELNNLSB;
3365 dynindx = 0;
3366 addend = value;
3369 if (bfd_big_endian (abfd))
3371 switch (dyn_r_type)
3373 case R_IA64_REL32LSB:
3374 dyn_r_type = R_IA64_REL32MSB;
3375 break;
3376 case R_IA64_DIR32LSB:
3377 dyn_r_type = R_IA64_DIR32MSB;
3378 break;
3379 case R_IA64_FPTR32LSB:
3380 dyn_r_type = R_IA64_FPTR32MSB;
3381 break;
3382 case R_IA64_DTPREL32LSB:
3383 dyn_r_type = R_IA64_DTPREL32MSB;
3384 break;
3385 case R_IA64_REL64LSB:
3386 dyn_r_type = R_IA64_REL64MSB;
3387 break;
3388 case R_IA64_DIR64LSB:
3389 dyn_r_type = R_IA64_DIR64MSB;
3390 break;
3391 case R_IA64_FPTR64LSB:
3392 dyn_r_type = R_IA64_FPTR64MSB;
3393 break;
3394 case R_IA64_TPREL64LSB:
3395 dyn_r_type = R_IA64_TPREL64MSB;
3396 break;
3397 case R_IA64_DTPMOD64LSB:
3398 dyn_r_type = R_IA64_DTPMOD64MSB;
3399 break;
3400 case R_IA64_DTPREL64LSB:
3401 dyn_r_type = R_IA64_DTPREL64MSB;
3402 break;
3403 default:
3404 BFD_ASSERT (FALSE);
3405 break;
3409 elfNN_ia64_install_dyn_reloc (abfd, NULL, got_sec,
3410 ia64_info->root.srelgot,
3411 got_offset, dyn_r_type,
3412 dynindx, addend);
3416 /* Return the address of the linkage table entry. */
3417 value = (got_sec->output_section->vma
3418 + got_sec->output_offset
3419 + got_offset);
3421 return value;
3424 /* Fill in a function descriptor consisting of the function's code
3425 address and its global pointer. Return the descriptor's address. */
3427 static bfd_vma
3428 set_fptr_entry (bfd *abfd, struct bfd_link_info *info,
3429 struct elfNN_ia64_dyn_sym_info *dyn_i,
3430 bfd_vma value)
3432 struct elfNN_ia64_link_hash_table *ia64_info;
3433 asection *fptr_sec;
3435 ia64_info = elfNN_ia64_hash_table (info);
3436 if (ia64_info == NULL)
3437 return 0;
3439 fptr_sec = ia64_info->fptr_sec;
3441 if (!dyn_i->fptr_done)
3443 dyn_i->fptr_done = 1;
3445 /* Fill in the function descriptor. */
3446 bfd_put_64 (abfd, value, fptr_sec->contents + dyn_i->fptr_offset);
3447 bfd_put_64 (abfd, _bfd_get_gp_value (abfd),
3448 fptr_sec->contents + dyn_i->fptr_offset + 8);
3449 if (ia64_info->rel_fptr_sec)
3451 Elf_Internal_Rela outrel;
3452 bfd_byte *loc;
3454 if (bfd_little_endian (abfd))
3455 outrel.r_info = ELFNN_R_INFO (0, R_IA64_IPLTLSB);
3456 else
3457 outrel.r_info = ELFNN_R_INFO (0, R_IA64_IPLTMSB);
3458 outrel.r_addend = value;
3459 outrel.r_offset = (fptr_sec->output_section->vma
3460 + fptr_sec->output_offset
3461 + dyn_i->fptr_offset);
3462 loc = ia64_info->rel_fptr_sec->contents;
3463 loc += ia64_info->rel_fptr_sec->reloc_count++
3464 * sizeof (ElfNN_External_Rela);
3465 bfd_elfNN_swap_reloca_out (abfd, &outrel, loc);
3469 /* Return the descriptor's address. */
3470 value = (fptr_sec->output_section->vma
3471 + fptr_sec->output_offset
3472 + dyn_i->fptr_offset);
3474 return value;
3477 /* Fill in a PLTOFF entry consisting of the function's code address
3478 and its global pointer. Return the descriptor's address. */
3480 static bfd_vma
3481 set_pltoff_entry (bfd *abfd, struct bfd_link_info *info,
3482 struct elfNN_ia64_dyn_sym_info *dyn_i,
3483 bfd_vma value, bfd_boolean is_plt)
3485 struct elfNN_ia64_link_hash_table *ia64_info;
3486 asection *pltoff_sec;
3488 ia64_info = elfNN_ia64_hash_table (info);
3489 if (ia64_info == NULL)
3490 return 0;
3492 pltoff_sec = ia64_info->pltoff_sec;
3494 /* Don't do anything if this symbol uses a real PLT entry. In
3495 that case, we'll fill this in during finish_dynamic_symbol. */
3496 if ((! dyn_i->want_plt || is_plt)
3497 && !dyn_i->pltoff_done)
3499 bfd_vma gp = _bfd_get_gp_value (abfd);
3501 /* Fill in the function descriptor. */
3502 bfd_put_64 (abfd, value, pltoff_sec->contents + dyn_i->pltoff_offset);
3503 bfd_put_64 (abfd, gp, pltoff_sec->contents + dyn_i->pltoff_offset + 8);
3505 /* Install dynamic relocations if needed. */
3506 if (!is_plt
3507 && bfd_link_pic (info)
3508 && (!dyn_i->h
3509 || (ELF_ST_VISIBILITY (dyn_i->h->other) == STV_DEFAULT
3510 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info, dyn_i->h))
3511 || dyn_i->h->root.type != bfd_link_hash_undefweak))
3513 unsigned int dyn_r_type;
3515 if (bfd_big_endian (abfd))
3516 dyn_r_type = R_IA64_RELNNMSB;
3517 else
3518 dyn_r_type = R_IA64_RELNNLSB;
3520 elfNN_ia64_install_dyn_reloc (abfd, NULL, pltoff_sec,
3521 ia64_info->rel_pltoff_sec,
3522 dyn_i->pltoff_offset,
3523 dyn_r_type, 0, value);
3524 elfNN_ia64_install_dyn_reloc (abfd, NULL, pltoff_sec,
3525 ia64_info->rel_pltoff_sec,
3526 dyn_i->pltoff_offset + ARCH_SIZE / 8,
3527 dyn_r_type, 0, gp);
3530 dyn_i->pltoff_done = 1;
3533 /* Return the descriptor's address. */
3534 value = (pltoff_sec->output_section->vma
3535 + pltoff_sec->output_offset
3536 + dyn_i->pltoff_offset);
3538 return value;
3541 /* Return the base VMA address which should be subtracted from real addresses
3542 when resolving @tprel() relocation.
3543 Main program TLS (whose template starts at PT_TLS p_vaddr)
3544 is assigned offset round(2 * size of pointer, PT_TLS p_align). */
3546 static bfd_vma
3547 elfNN_ia64_tprel_base (struct bfd_link_info *info)
3549 asection *tls_sec = elf_hash_table (info)->tls_sec;
3550 return tls_sec->vma - align_power ((bfd_vma) ARCH_SIZE / 4,
3551 tls_sec->alignment_power);
3554 /* Return the base VMA address which should be subtracted from real addresses
3555 when resolving @dtprel() relocation.
3556 This is PT_TLS segment p_vaddr. */
3558 static bfd_vma
3559 elfNN_ia64_dtprel_base (struct bfd_link_info *info)
3561 return elf_hash_table (info)->tls_sec->vma;
3564 /* Called through qsort to sort the .IA_64.unwind section during a
3565 non-relocatable link. Set elfNN_ia64_unwind_entry_compare_bfd
3566 to the output bfd so we can do proper endianness frobbing. */
3568 static bfd *elfNN_ia64_unwind_entry_compare_bfd;
3570 static int
3571 elfNN_ia64_unwind_entry_compare (const void * a, const void * b)
3573 bfd_vma av, bv;
3575 av = bfd_get_64 (elfNN_ia64_unwind_entry_compare_bfd, a);
3576 bv = bfd_get_64 (elfNN_ia64_unwind_entry_compare_bfd, b);
3578 return (av < bv ? -1 : av > bv ? 1 : 0);
3581 /* Make sure we've got ourselves a nice fat __gp value. */
3582 static bfd_boolean
3583 elfNN_ia64_choose_gp (bfd *abfd, struct bfd_link_info *info, bfd_boolean final)
3585 bfd_vma min_vma = (bfd_vma) -1, max_vma = 0;
3586 bfd_vma min_short_vma = min_vma, max_short_vma = 0;
3587 struct elf_link_hash_entry *gp;
3588 bfd_vma gp_val;
3589 asection *os;
3590 struct elfNN_ia64_link_hash_table *ia64_info;
3592 ia64_info = elfNN_ia64_hash_table (info);
3593 if (ia64_info == NULL)
3594 return FALSE;
3596 /* Find the min and max vma of all sections marked short. Also collect
3597 min and max vma of any type, for use in selecting a nice gp. */
3598 for (os = abfd->sections; os ; os = os->next)
3600 bfd_vma lo, hi;
3602 if ((os->flags & SEC_ALLOC) == 0)
3603 continue;
3605 lo = os->vma;
3606 /* When this function is called from elfNN_ia64_final_link
3607 the correct value to use is os->size. When called from
3608 elfNN_ia64_relax_section we are in the middle of section
3609 sizing; some sections will already have os->size set, others
3610 will have os->size zero and os->rawsize the previous size. */
3611 hi = os->vma + (!final && os->rawsize ? os->rawsize : os->size);
3612 if (hi < lo)
3613 hi = (bfd_vma) -1;
3615 if (min_vma > lo)
3616 min_vma = lo;
3617 if (max_vma < hi)
3618 max_vma = hi;
3619 if (os->flags & SEC_SMALL_DATA)
3621 if (min_short_vma > lo)
3622 min_short_vma = lo;
3623 if (max_short_vma < hi)
3624 max_short_vma = hi;
3628 if (ia64_info->min_short_sec)
3630 if (min_short_vma
3631 > (ia64_info->min_short_sec->vma
3632 + ia64_info->min_short_offset))
3633 min_short_vma = (ia64_info->min_short_sec->vma
3634 + ia64_info->min_short_offset);
3635 if (max_short_vma
3636 < (ia64_info->max_short_sec->vma
3637 + ia64_info->max_short_offset))
3638 max_short_vma = (ia64_info->max_short_sec->vma
3639 + ia64_info->max_short_offset);
3642 /* See if the user wants to force a value. */
3643 gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", FALSE,
3644 FALSE, FALSE);
3646 if (gp
3647 && (gp->root.type == bfd_link_hash_defined
3648 || gp->root.type == bfd_link_hash_defweak))
3650 asection *gp_sec = gp->root.u.def.section;
3651 gp_val = (gp->root.u.def.value
3652 + gp_sec->output_section->vma
3653 + gp_sec->output_offset);
3655 else
3657 /* Pick a sensible value. */
3659 if (ia64_info->min_short_sec)
3661 bfd_vma short_range = max_short_vma - min_short_vma;
3663 /* If min_short_sec is set, pick one in the middle bewteen
3664 min_short_vma and max_short_vma. */
3665 if (short_range >= 0x400000)
3666 goto overflow;
3667 gp_val = min_short_vma + short_range / 2;
3669 else
3671 asection *got_sec = ia64_info->root.sgot;
3673 /* Start with just the address of the .got. */
3674 if (got_sec)
3675 gp_val = got_sec->output_section->vma;
3676 else if (max_short_vma != 0)
3677 gp_val = min_short_vma;
3678 else if (max_vma - min_vma < 0x200000)
3679 gp_val = min_vma;
3680 else
3681 gp_val = max_vma - 0x200000 + 8;
3684 /* If it is possible to address the entire image, but we
3685 don't with the choice above, adjust. */
3686 if (max_vma - min_vma < 0x400000
3687 && (max_vma - gp_val >= 0x200000
3688 || gp_val - min_vma > 0x200000))
3689 gp_val = min_vma + 0x200000;
3690 else if (max_short_vma != 0)
3692 /* If we don't cover all the short data, adjust. */
3693 if (max_short_vma - gp_val >= 0x200000)
3694 gp_val = min_short_vma + 0x200000;
3696 /* If we're addressing stuff past the end, adjust back. */
3697 if (gp_val > max_vma)
3698 gp_val = max_vma - 0x200000 + 8;
3702 /* Validate whether all SHF_IA_64_SHORT sections are within
3703 range of the chosen GP. */
3705 if (max_short_vma != 0)
3707 if (max_short_vma - min_short_vma >= 0x400000)
3709 overflow:
3710 _bfd_error_handler
3711 /* xgettext:c-format */
3712 (_("%pB: short data segment overflowed (%#" PRIx64 " >= 0x400000)"),
3713 abfd, (uint64_t) (max_short_vma - min_short_vma));
3714 return FALSE;
3716 else if ((gp_val > min_short_vma
3717 && gp_val - min_short_vma > 0x200000)
3718 || (gp_val < max_short_vma
3719 && max_short_vma - gp_val >= 0x200000))
3721 _bfd_error_handler
3722 (_("%pB: __gp does not cover short data segment"), abfd);
3723 return FALSE;
3727 _bfd_set_gp_value (abfd, gp_val);
3729 return TRUE;
3732 static bfd_boolean
3733 elfNN_ia64_final_link (bfd *abfd, struct bfd_link_info *info)
3735 struct elfNN_ia64_link_hash_table *ia64_info;
3736 asection *unwind_output_sec;
3738 ia64_info = elfNN_ia64_hash_table (info);
3739 if (ia64_info == NULL)
3740 return FALSE;
3742 /* Make sure we've got ourselves a nice fat __gp value. */
3743 if (!bfd_link_relocatable (info))
3745 bfd_vma gp_val;
3746 struct elf_link_hash_entry *gp;
3748 /* We assume after gp is set, section size will only decrease. We
3749 need to adjust gp for it. */
3750 _bfd_set_gp_value (abfd, 0);
3751 if (! elfNN_ia64_choose_gp (abfd, info, TRUE))
3752 return FALSE;
3753 gp_val = _bfd_get_gp_value (abfd);
3755 gp = elf_link_hash_lookup (elf_hash_table (info), "__gp", FALSE,
3756 FALSE, FALSE);
3757 if (gp)
3759 gp->root.type = bfd_link_hash_defined;
3760 gp->root.u.def.value = gp_val;
3761 gp->root.u.def.section = bfd_abs_section_ptr;
3765 /* If we're producing a final executable, we need to sort the contents
3766 of the .IA_64.unwind section. Force this section to be relocated
3767 into memory rather than written immediately to the output file. */
3768 unwind_output_sec = NULL;
3769 if (!bfd_link_relocatable (info))
3771 asection *s = bfd_get_section_by_name (abfd, ELF_STRING_ia64_unwind);
3772 if (s)
3774 unwind_output_sec = s->output_section;
3775 unwind_output_sec->contents
3776 = bfd_malloc (unwind_output_sec->size);
3777 if (unwind_output_sec->contents == NULL)
3778 return FALSE;
3782 /* Invoke the regular ELF backend linker to do all the work. */
3783 if (!bfd_elf_final_link (abfd, info))
3784 return FALSE;
3786 if (unwind_output_sec)
3788 elfNN_ia64_unwind_entry_compare_bfd = abfd;
3789 qsort (unwind_output_sec->contents,
3790 (size_t) (unwind_output_sec->size / 24),
3792 elfNN_ia64_unwind_entry_compare);
3794 if (! bfd_set_section_contents (abfd, unwind_output_sec,
3795 unwind_output_sec->contents, (bfd_vma) 0,
3796 unwind_output_sec->size))
3797 return FALSE;
3800 return TRUE;
3803 static bfd_boolean
3804 elfNN_ia64_relocate_section (bfd *output_bfd,
3805 struct bfd_link_info *info,
3806 bfd *input_bfd,
3807 asection *input_section,
3808 bfd_byte *contents,
3809 Elf_Internal_Rela *relocs,
3810 Elf_Internal_Sym *local_syms,
3811 asection **local_sections)
3813 struct elfNN_ia64_link_hash_table *ia64_info;
3814 Elf_Internal_Shdr *symtab_hdr;
3815 Elf_Internal_Rela *rel;
3816 Elf_Internal_Rela *relend;
3817 asection *srel;
3818 bfd_boolean ret_val = TRUE; /* for non-fatal errors */
3819 bfd_vma gp_val;
3821 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3822 ia64_info = elfNN_ia64_hash_table (info);
3823 if (ia64_info == NULL)
3824 return FALSE;
3826 /* Infect various flags from the input section to the output section. */
3827 if (bfd_link_relocatable (info))
3829 bfd_vma flags;
3831 flags = elf_section_data(input_section)->this_hdr.sh_flags;
3832 flags &= SHF_IA_64_NORECOV;
3834 elf_section_data(input_section->output_section)
3835 ->this_hdr.sh_flags |= flags;
3838 gp_val = _bfd_get_gp_value (output_bfd);
3839 srel = get_reloc_section (input_bfd, ia64_info, input_section, FALSE);
3841 rel = relocs;
3842 relend = relocs + input_section->reloc_count;
3843 for (; rel < relend; ++rel)
3845 struct elf_link_hash_entry *h;
3846 struct elfNN_ia64_dyn_sym_info *dyn_i;
3847 bfd_reloc_status_type r;
3848 reloc_howto_type *howto;
3849 unsigned long r_symndx;
3850 Elf_Internal_Sym *sym;
3851 unsigned int r_type;
3852 bfd_vma value;
3853 asection *sym_sec;
3854 bfd_byte *hit_addr;
3855 bfd_boolean dynamic_symbol_p;
3856 bfd_boolean undef_weak_ref;
3858 r_type = ELFNN_R_TYPE (rel->r_info);
3859 if (r_type > R_IA64_MAX_RELOC_CODE)
3861 /* xgettext:c-format */
3862 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
3863 input_bfd, (int) r_type);
3864 bfd_set_error (bfd_error_bad_value);
3865 ret_val = FALSE;
3866 continue;
3869 howto = ia64_elf_lookup_howto (r_type);
3870 if (howto == NULL)
3872 ret_val = FALSE;
3873 continue;
3876 r_symndx = ELFNN_R_SYM (rel->r_info);
3877 h = NULL;
3878 sym = NULL;
3879 sym_sec = NULL;
3880 undef_weak_ref = FALSE;
3882 if (r_symndx < symtab_hdr->sh_info)
3884 /* Reloc against local symbol. */
3885 asection *msec;
3886 sym = local_syms + r_symndx;
3887 sym_sec = local_sections[r_symndx];
3888 msec = sym_sec;
3889 value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel);
3890 if (!bfd_link_relocatable (info)
3891 && (sym_sec->flags & SEC_MERGE) != 0
3892 && ELF_ST_TYPE (sym->st_info) == STT_SECTION
3893 && sym_sec->sec_info_type == SEC_INFO_TYPE_MERGE)
3895 struct elfNN_ia64_local_hash_entry *loc_h;
3897 loc_h = get_local_sym_hash (ia64_info, input_bfd, rel, FALSE);
3898 if (loc_h && ! loc_h->sec_merge_done)
3900 struct elfNN_ia64_dyn_sym_info *dynent;
3901 unsigned int count;
3903 for (count = loc_h->count, dynent = loc_h->info;
3904 count != 0;
3905 count--, dynent++)
3907 msec = sym_sec;
3908 dynent->addend =
3909 _bfd_merged_section_offset (output_bfd, &msec,
3910 elf_section_data (msec)->
3911 sec_info,
3912 sym->st_value
3913 + dynent->addend);
3914 dynent->addend -= sym->st_value;
3915 dynent->addend += msec->output_section->vma
3916 + msec->output_offset
3917 - sym_sec->output_section->vma
3918 - sym_sec->output_offset;
3921 /* We may have introduced duplicated entries. We need
3922 to remove them properly. */
3923 count = sort_dyn_sym_info (loc_h->info, loc_h->count);
3924 if (count != loc_h->count)
3926 loc_h->count = count;
3927 loc_h->sorted_count = count;
3930 loc_h->sec_merge_done = 1;
3934 else
3936 bfd_boolean unresolved_reloc;
3937 bfd_boolean warned, ignored;
3938 struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
3940 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3941 r_symndx, symtab_hdr, sym_hashes,
3942 h, sym_sec, value,
3943 unresolved_reloc, warned, ignored);
3945 if (h->root.type == bfd_link_hash_undefweak)
3946 undef_weak_ref = TRUE;
3947 else if (warned || (ignored && bfd_link_executable (info)))
3948 continue;
3951 if (sym_sec != NULL && discarded_section (sym_sec))
3952 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3953 rel, 1, relend, howto, 0, contents);
3955 if (bfd_link_relocatable (info))
3956 continue;
3958 hit_addr = contents + rel->r_offset;
3959 value += rel->r_addend;
3960 dynamic_symbol_p = elfNN_ia64_dynamic_symbol_p (h, info, r_type);
3962 switch (r_type)
3964 case R_IA64_NONE:
3965 case R_IA64_LDXMOV:
3966 continue;
3968 case R_IA64_IMM14:
3969 case R_IA64_IMM22:
3970 case R_IA64_IMM64:
3971 case R_IA64_DIR32MSB:
3972 case R_IA64_DIR32LSB:
3973 case R_IA64_DIR64MSB:
3974 case R_IA64_DIR64LSB:
3975 /* Install a dynamic relocation for this reloc. */
3976 if ((dynamic_symbol_p || bfd_link_pic (info))
3977 && !(h && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3978 && r_symndx != STN_UNDEF
3979 && (input_section->flags & SEC_ALLOC) != 0)
3981 unsigned int dyn_r_type;
3982 long dynindx;
3983 bfd_vma addend;
3985 BFD_ASSERT (srel != NULL);
3987 switch (r_type)
3989 case R_IA64_IMM14:
3990 case R_IA64_IMM22:
3991 case R_IA64_IMM64:
3992 /* ??? People shouldn't be doing non-pic code in
3993 shared libraries nor dynamic executables. */
3994 _bfd_error_handler
3995 /* xgettext:c-format */
3996 (_("%pB: non-pic code with imm relocation against dynamic symbol `%s'"),
3997 input_bfd,
3998 h ? h->root.root.string
3999 : bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4000 sym_sec));
4001 ret_val = FALSE;
4002 continue;
4004 default:
4005 break;
4008 /* If we don't need dynamic symbol lookup, find a
4009 matching RELATIVE relocation. */
4010 dyn_r_type = r_type;
4011 if (dynamic_symbol_p)
4013 dynindx = h->dynindx;
4014 addend = rel->r_addend;
4015 value = 0;
4017 else
4019 switch (r_type)
4021 case R_IA64_DIR32MSB:
4022 dyn_r_type = R_IA64_REL32MSB;
4023 break;
4024 case R_IA64_DIR32LSB:
4025 dyn_r_type = R_IA64_REL32LSB;
4026 break;
4027 case R_IA64_DIR64MSB:
4028 dyn_r_type = R_IA64_REL64MSB;
4029 break;
4030 case R_IA64_DIR64LSB:
4031 dyn_r_type = R_IA64_REL64LSB;
4032 break;
4034 default:
4035 break;
4037 dynindx = 0;
4038 addend = value;
4041 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section,
4042 srel, rel->r_offset, dyn_r_type,
4043 dynindx, addend);
4045 /* Fall through. */
4047 case R_IA64_LTV32MSB:
4048 case R_IA64_LTV32LSB:
4049 case R_IA64_LTV64MSB:
4050 case R_IA64_LTV64LSB:
4051 r = ia64_elf_install_value (hit_addr, value, r_type);
4052 break;
4054 case R_IA64_GPREL22:
4055 case R_IA64_GPREL64I:
4056 case R_IA64_GPREL32MSB:
4057 case R_IA64_GPREL32LSB:
4058 case R_IA64_GPREL64MSB:
4059 case R_IA64_GPREL64LSB:
4060 if (dynamic_symbol_p)
4062 _bfd_error_handler
4063 /* xgettext:c-format */
4064 (_("%pB: @gprel relocation against dynamic symbol %s"),
4065 input_bfd,
4066 h ? h->root.root.string
4067 : bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4068 sym_sec));
4069 ret_val = FALSE;
4070 continue;
4072 value -= gp_val;
4073 r = ia64_elf_install_value (hit_addr, value, r_type);
4074 break;
4076 case R_IA64_LTOFF22:
4077 case R_IA64_LTOFF22X:
4078 case R_IA64_LTOFF64I:
4079 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE);
4080 value = set_got_entry (input_bfd, info, dyn_i, (h ? h->dynindx : -1),
4081 rel->r_addend, value, R_IA64_DIRNNLSB);
4082 value -= gp_val;
4083 r = ia64_elf_install_value (hit_addr, value, r_type);
4084 break;
4086 case R_IA64_PLTOFF22:
4087 case R_IA64_PLTOFF64I:
4088 case R_IA64_PLTOFF64MSB:
4089 case R_IA64_PLTOFF64LSB:
4090 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE);
4091 value = set_pltoff_entry (output_bfd, info, dyn_i, value, FALSE);
4092 value -= gp_val;
4093 r = ia64_elf_install_value (hit_addr, value, r_type);
4094 break;
4096 case R_IA64_FPTR64I:
4097 case R_IA64_FPTR32MSB:
4098 case R_IA64_FPTR32LSB:
4099 case R_IA64_FPTR64MSB:
4100 case R_IA64_FPTR64LSB:
4101 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE);
4102 if (dyn_i->want_fptr)
4104 if (!undef_weak_ref)
4105 value = set_fptr_entry (output_bfd, info, dyn_i, value);
4107 if (!dyn_i->want_fptr || bfd_link_pie (info))
4109 long dynindx;
4110 unsigned int dyn_r_type = r_type;
4111 bfd_vma addend = rel->r_addend;
4113 /* Otherwise, we expect the dynamic linker to create
4114 the entry. */
4116 if (dyn_i->want_fptr)
4118 if (r_type == R_IA64_FPTR64I)
4120 /* We can't represent this without a dynamic symbol.
4121 Adjust the relocation to be against an output
4122 section symbol, which are always present in the
4123 dynamic symbol table. */
4124 /* ??? People shouldn't be doing non-pic code in
4125 shared libraries. Hork. */
4126 _bfd_error_handler
4127 (_("%pB: linking non-pic code in a position independent executable"),
4128 input_bfd);
4129 ret_val = FALSE;
4130 continue;
4132 dynindx = 0;
4133 addend = value;
4134 dyn_r_type = r_type + R_IA64_RELNNLSB - R_IA64_FPTRNNLSB;
4136 else if (h)
4138 if (h->dynindx != -1)
4139 dynindx = h->dynindx;
4140 else
4141 dynindx = (_bfd_elf_link_lookup_local_dynindx
4142 (info, h->root.u.def.section->owner,
4143 global_sym_index (h)));
4144 value = 0;
4146 else
4148 dynindx = (_bfd_elf_link_lookup_local_dynindx
4149 (info, input_bfd, (long) r_symndx));
4150 value = 0;
4153 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section,
4154 srel, rel->r_offset, dyn_r_type,
4155 dynindx, addend);
4158 r = ia64_elf_install_value (hit_addr, value, r_type);
4159 break;
4161 case R_IA64_LTOFF_FPTR22:
4162 case R_IA64_LTOFF_FPTR64I:
4163 case R_IA64_LTOFF_FPTR32MSB:
4164 case R_IA64_LTOFF_FPTR32LSB:
4165 case R_IA64_LTOFF_FPTR64MSB:
4166 case R_IA64_LTOFF_FPTR64LSB:
4168 long dynindx;
4170 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE);
4171 if (dyn_i->want_fptr)
4173 BFD_ASSERT (h == NULL || h->dynindx == -1);
4174 if (!undef_weak_ref)
4175 value = set_fptr_entry (output_bfd, info, dyn_i, value);
4176 dynindx = -1;
4178 else
4180 /* Otherwise, we expect the dynamic linker to create
4181 the entry. */
4182 if (h)
4184 if (h->dynindx != -1)
4185 dynindx = h->dynindx;
4186 else
4187 dynindx = (_bfd_elf_link_lookup_local_dynindx
4188 (info, h->root.u.def.section->owner,
4189 global_sym_index (h)));
4191 else
4192 dynindx = (_bfd_elf_link_lookup_local_dynindx
4193 (info, input_bfd, (long) r_symndx));
4194 value = 0;
4197 value = set_got_entry (output_bfd, info, dyn_i, dynindx,
4198 rel->r_addend, value, R_IA64_FPTRNNLSB);
4199 value -= gp_val;
4200 r = ia64_elf_install_value (hit_addr, value, r_type);
4202 break;
4204 case R_IA64_PCREL32MSB:
4205 case R_IA64_PCREL32LSB:
4206 case R_IA64_PCREL64MSB:
4207 case R_IA64_PCREL64LSB:
4208 /* Install a dynamic relocation for this reloc. */
4209 if (dynamic_symbol_p && r_symndx != STN_UNDEF)
4211 BFD_ASSERT (srel != NULL);
4213 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section,
4214 srel, rel->r_offset, r_type,
4215 h->dynindx, rel->r_addend);
4217 goto finish_pcrel;
4219 case R_IA64_PCREL21B:
4220 case R_IA64_PCREL60B:
4221 /* We should have created a PLT entry for any dynamic symbol. */
4222 dyn_i = NULL;
4223 if (h)
4224 dyn_i = get_dyn_sym_info (ia64_info, h, NULL, NULL, FALSE);
4226 if (dyn_i && dyn_i->want_plt2)
4228 /* Should have caught this earlier. */
4229 BFD_ASSERT (rel->r_addend == 0);
4231 value = (ia64_info->root.splt->output_section->vma
4232 + ia64_info->root.splt->output_offset
4233 + dyn_i->plt2_offset);
4235 else
4237 /* Since there's no PLT entry, Validate that this is
4238 locally defined. */
4239 BFD_ASSERT (undef_weak_ref || sym_sec->output_section != NULL);
4241 /* If the symbol is undef_weak, we shouldn't be trying
4242 to call it. There's every chance that we'd wind up
4243 with an out-of-range fixup here. Don't bother setting
4244 any value at all. */
4245 if (undef_weak_ref)
4246 continue;
4248 goto finish_pcrel;
4250 case R_IA64_PCREL21BI:
4251 case R_IA64_PCREL21F:
4252 case R_IA64_PCREL21M:
4253 case R_IA64_PCREL22:
4254 case R_IA64_PCREL64I:
4255 /* The PCREL21BI reloc is specifically not intended for use with
4256 dynamic relocs. PCREL21F and PCREL21M are used for speculation
4257 fixup code, and thus probably ought not be dynamic. The
4258 PCREL22 and PCREL64I relocs aren't emitted as dynamic relocs. */
4259 if (dynamic_symbol_p)
4261 const char *msg;
4263 if (r_type == R_IA64_PCREL21BI)
4264 /* xgettext:c-format */
4265 msg = _("%pB: @internal branch to dynamic symbol %s");
4266 else if (r_type == R_IA64_PCREL21F || r_type == R_IA64_PCREL21M)
4267 /* xgettext:c-format */
4268 msg = _("%pB: speculation fixup to dynamic symbol %s");
4269 else
4270 /* xgettext:c-format */
4271 msg = _("%pB: @pcrel relocation against dynamic symbol %s");
4272 _bfd_error_handler (msg, input_bfd,
4273 h ? h->root.root.string
4274 : bfd_elf_sym_name (input_bfd,
4275 symtab_hdr,
4276 sym,
4277 sym_sec));
4278 ret_val = FALSE;
4279 continue;
4281 goto finish_pcrel;
4283 finish_pcrel:
4284 /* Make pc-relative. */
4285 value -= (input_section->output_section->vma
4286 + input_section->output_offset
4287 + rel->r_offset) & ~ (bfd_vma) 0x3;
4288 r = ia64_elf_install_value (hit_addr, value, r_type);
4289 break;
4291 case R_IA64_SEGREL32MSB:
4292 case R_IA64_SEGREL32LSB:
4293 case R_IA64_SEGREL64MSB:
4294 case R_IA64_SEGREL64LSB:
4296 /* Find the segment that contains the output_section. */
4297 Elf_Internal_Phdr *p = _bfd_elf_find_segment_containing_section
4298 (output_bfd, input_section->output_section);
4300 if (p == NULL)
4302 r = bfd_reloc_notsupported;
4304 else
4306 /* The VMA of the segment is the vaddr of the associated
4307 program header. */
4308 if (value > p->p_vaddr)
4309 value -= p->p_vaddr;
4310 else
4311 value = 0;
4312 r = ia64_elf_install_value (hit_addr, value, r_type);
4314 break;
4317 case R_IA64_SECREL32MSB:
4318 case R_IA64_SECREL32LSB:
4319 case R_IA64_SECREL64MSB:
4320 case R_IA64_SECREL64LSB:
4321 /* Make output-section relative to section where the symbol
4322 is defined. PR 475 */
4323 if (sym_sec)
4324 value -= sym_sec->output_section->vma;
4325 r = ia64_elf_install_value (hit_addr, value, r_type);
4326 break;
4328 case R_IA64_IPLTMSB:
4329 case R_IA64_IPLTLSB:
4330 /* Install a dynamic relocation for this reloc. */
4331 if ((dynamic_symbol_p || bfd_link_pic (info))
4332 && (input_section->flags & SEC_ALLOC) != 0)
4334 BFD_ASSERT (srel != NULL);
4336 /* If we don't need dynamic symbol lookup, install two
4337 RELATIVE relocations. */
4338 if (!dynamic_symbol_p)
4340 unsigned int dyn_r_type;
4342 if (r_type == R_IA64_IPLTMSB)
4343 dyn_r_type = R_IA64_REL64MSB;
4344 else
4345 dyn_r_type = R_IA64_REL64LSB;
4347 elfNN_ia64_install_dyn_reloc (output_bfd, info,
4348 input_section,
4349 srel, rel->r_offset,
4350 dyn_r_type, 0, value);
4351 elfNN_ia64_install_dyn_reloc (output_bfd, info,
4352 input_section,
4353 srel, rel->r_offset + 8,
4354 dyn_r_type, 0, gp_val);
4356 else
4357 elfNN_ia64_install_dyn_reloc (output_bfd, info, input_section,
4358 srel, rel->r_offset, r_type,
4359 h->dynindx, rel->r_addend);
4362 if (r_type == R_IA64_IPLTMSB)
4363 r_type = R_IA64_DIR64MSB;
4364 else
4365 r_type = R_IA64_DIR64LSB;
4366 ia64_elf_install_value (hit_addr, value, r_type);
4367 r = ia64_elf_install_value (hit_addr + 8, gp_val, r_type);
4368 break;
4370 case R_IA64_TPREL14:
4371 case R_IA64_TPREL22:
4372 case R_IA64_TPREL64I:
4373 if (elf_hash_table (info)->tls_sec == NULL)
4374 goto missing_tls_sec;
4375 value -= elfNN_ia64_tprel_base (info);
4376 r = ia64_elf_install_value (hit_addr, value, r_type);
4377 break;
4379 case R_IA64_DTPREL14:
4380 case R_IA64_DTPREL22:
4381 case R_IA64_DTPREL64I:
4382 case R_IA64_DTPREL32LSB:
4383 case R_IA64_DTPREL32MSB:
4384 case R_IA64_DTPREL64LSB:
4385 case R_IA64_DTPREL64MSB:
4386 if (elf_hash_table (info)->tls_sec == NULL)
4387 goto missing_tls_sec;
4388 value -= elfNN_ia64_dtprel_base (info);
4389 r = ia64_elf_install_value (hit_addr, value, r_type);
4390 break;
4392 case R_IA64_LTOFF_TPREL22:
4393 case R_IA64_LTOFF_DTPMOD22:
4394 case R_IA64_LTOFF_DTPREL22:
4396 int got_r_type;
4397 long dynindx = h ? h->dynindx : -1;
4398 bfd_vma r_addend = rel->r_addend;
4400 switch (r_type)
4402 default:
4403 case R_IA64_LTOFF_TPREL22:
4404 if (!dynamic_symbol_p)
4406 if (elf_hash_table (info)->tls_sec == NULL)
4407 goto missing_tls_sec;
4408 if (!bfd_link_pic (info))
4409 value -= elfNN_ia64_tprel_base (info);
4410 else
4412 r_addend += value - elfNN_ia64_dtprel_base (info);
4413 dynindx = 0;
4416 got_r_type = R_IA64_TPREL64LSB;
4417 break;
4418 case R_IA64_LTOFF_DTPMOD22:
4419 if (!dynamic_symbol_p && !bfd_link_pic (info))
4420 value = 1;
4421 got_r_type = R_IA64_DTPMOD64LSB;
4422 break;
4423 case R_IA64_LTOFF_DTPREL22:
4424 if (!dynamic_symbol_p)
4426 if (elf_hash_table (info)->tls_sec == NULL)
4427 goto missing_tls_sec;
4428 value -= elfNN_ia64_dtprel_base (info);
4430 got_r_type = R_IA64_DTPRELNNLSB;
4431 break;
4433 dyn_i = get_dyn_sym_info (ia64_info, h, input_bfd, rel, FALSE);
4434 value = set_got_entry (input_bfd, info, dyn_i, dynindx, r_addend,
4435 value, got_r_type);
4436 value -= gp_val;
4437 r = ia64_elf_install_value (hit_addr, value, r_type);
4439 break;
4441 default:
4442 r = bfd_reloc_notsupported;
4443 break;
4446 switch (r)
4448 case bfd_reloc_ok:
4449 break;
4451 case bfd_reloc_undefined:
4452 /* This can happen for global table relative relocs if
4453 __gp is undefined. This is a panic situation so we
4454 don't try to continue. */
4455 (*info->callbacks->undefined_symbol)
4456 (info, "__gp", input_bfd, input_section, rel->r_offset, 1);
4457 return FALSE;
4459 case bfd_reloc_notsupported:
4461 const char *name;
4463 if (h)
4464 name = h->root.root.string;
4465 else
4466 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4467 sym_sec);
4468 (*info->callbacks->warning) (info, _("unsupported reloc"),
4469 name, input_bfd,
4470 input_section, rel->r_offset);
4471 ret_val = FALSE;
4473 break;
4475 case bfd_reloc_dangerous:
4476 case bfd_reloc_outofrange:
4477 case bfd_reloc_overflow:
4478 default:
4479 missing_tls_sec:
4481 const char *name;
4483 if (h)
4484 name = h->root.root.string;
4485 else
4486 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4487 sym_sec);
4489 switch (r_type)
4491 case R_IA64_TPREL14:
4492 case R_IA64_TPREL22:
4493 case R_IA64_TPREL64I:
4494 case R_IA64_DTPREL14:
4495 case R_IA64_DTPREL22:
4496 case R_IA64_DTPREL64I:
4497 case R_IA64_DTPREL32LSB:
4498 case R_IA64_DTPREL32MSB:
4499 case R_IA64_DTPREL64LSB:
4500 case R_IA64_DTPREL64MSB:
4501 case R_IA64_LTOFF_TPREL22:
4502 case R_IA64_LTOFF_DTPMOD22:
4503 case R_IA64_LTOFF_DTPREL22:
4504 _bfd_error_handler
4505 /* xgettext:c-format */
4506 (_("%pB: missing TLS section for relocation %s against `%s'"
4507 " at %#" PRIx64 " in section `%pA'."),
4508 input_bfd, howto->name, name,
4509 (uint64_t) rel->r_offset, input_section);
4510 break;
4512 case R_IA64_PCREL21B:
4513 case R_IA64_PCREL21BI:
4514 case R_IA64_PCREL21M:
4515 case R_IA64_PCREL21F:
4516 if (is_elf_hash_table (info->hash))
4518 /* Relaxtion is always performed for ELF output.
4519 Overflow failures for those relocations mean
4520 that the section is too big to relax. */
4521 _bfd_error_handler
4522 /* xgettext:c-format */
4523 (_("%pB: Can't relax br (%s) to `%s' at %#" PRIx64
4524 " in section `%pA' with size %#" PRIx64
4525 " (> 0x1000000)."),
4526 input_bfd, howto->name, name, (uint64_t) rel->r_offset,
4527 input_section, (uint64_t) input_section->size);
4528 break;
4530 /* Fall through. */
4531 default:
4532 (*info->callbacks->reloc_overflow) (info,
4533 &h->root,
4534 name,
4535 howto->name,
4536 (bfd_vma) 0,
4537 input_bfd,
4538 input_section,
4539 rel->r_offset);
4540 break;
4543 ret_val = FALSE;
4545 break;
4549 return ret_val;
4552 static bfd_boolean
4553 elfNN_ia64_finish_dynamic_symbol (bfd *output_bfd,
4554 struct bfd_link_info *info,
4555 struct elf_link_hash_entry *h,
4556 Elf_Internal_Sym *sym)
4558 struct elfNN_ia64_link_hash_table *ia64_info;
4559 struct elfNN_ia64_dyn_sym_info *dyn_i;
4561 ia64_info = elfNN_ia64_hash_table (info);
4562 if (ia64_info == NULL)
4563 return FALSE;
4565 dyn_i = get_dyn_sym_info (ia64_info, h, NULL, NULL, FALSE);
4567 /* Fill in the PLT data, if required. */
4568 if (dyn_i && dyn_i->want_plt)
4570 Elf_Internal_Rela outrel;
4571 bfd_byte *loc;
4572 asection *plt_sec;
4573 bfd_vma plt_addr, pltoff_addr, gp_val, plt_index;
4575 gp_val = _bfd_get_gp_value (output_bfd);
4577 /* Initialize the minimal PLT entry. */
4579 plt_index = (dyn_i->plt_offset - PLT_HEADER_SIZE) / PLT_MIN_ENTRY_SIZE;
4580 plt_sec = ia64_info->root.splt;
4581 loc = plt_sec->contents + dyn_i->plt_offset;
4583 memcpy (loc, plt_min_entry, PLT_MIN_ENTRY_SIZE);
4584 ia64_elf_install_value (loc, plt_index, R_IA64_IMM22);
4585 ia64_elf_install_value (loc+2, -dyn_i->plt_offset, R_IA64_PCREL21B);
4587 plt_addr = (plt_sec->output_section->vma
4588 + plt_sec->output_offset
4589 + dyn_i->plt_offset);
4590 pltoff_addr = set_pltoff_entry (output_bfd, info, dyn_i, plt_addr, TRUE);
4592 /* Initialize the FULL PLT entry, if needed. */
4593 if (dyn_i->want_plt2)
4595 loc = plt_sec->contents + dyn_i->plt2_offset;
4597 memcpy (loc, plt_full_entry, PLT_FULL_ENTRY_SIZE);
4598 ia64_elf_install_value (loc, pltoff_addr - gp_val, R_IA64_IMM22);
4600 /* Mark the symbol as undefined, rather than as defined in the
4601 plt section. Leave the value alone. */
4602 /* ??? We didn't redefine it in adjust_dynamic_symbol in the
4603 first place. But perhaps elflink.c did some for us. */
4604 if (!h->def_regular)
4605 sym->st_shndx = SHN_UNDEF;
4608 /* Create the dynamic relocation. */
4609 outrel.r_offset = pltoff_addr;
4610 if (bfd_little_endian (output_bfd))
4611 outrel.r_info = ELFNN_R_INFO (h->dynindx, R_IA64_IPLTLSB);
4612 else
4613 outrel.r_info = ELFNN_R_INFO (h->dynindx, R_IA64_IPLTMSB);
4614 outrel.r_addend = 0;
4616 /* This is fun. In the .IA_64.pltoff section, we've got entries
4617 that correspond both to real PLT entries, and those that
4618 happened to resolve to local symbols but need to be created
4619 to satisfy @pltoff relocations. The .rela.IA_64.pltoff
4620 relocations for the real PLT should come at the end of the
4621 section, so that they can be indexed by plt entry at runtime.
4623 We emitted all of the relocations for the non-PLT @pltoff
4624 entries during relocate_section. So we can consider the
4625 existing sec->reloc_count to be the base of the array of
4626 PLT relocations. */
4628 loc = ia64_info->rel_pltoff_sec->contents;
4629 loc += ((ia64_info->rel_pltoff_sec->reloc_count + plt_index)
4630 * sizeof (ElfNN_External_Rela));
4631 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
4634 /* Mark some specially defined symbols as absolute. */
4635 if (h == ia64_info->root.hdynamic
4636 || h == ia64_info->root.hgot
4637 || h == ia64_info->root.hplt)
4638 sym->st_shndx = SHN_ABS;
4640 return TRUE;
4643 static bfd_boolean
4644 elfNN_ia64_finish_dynamic_sections (bfd *abfd,
4645 struct bfd_link_info *info)
4647 struct elfNN_ia64_link_hash_table *ia64_info;
4648 bfd *dynobj;
4650 ia64_info = elfNN_ia64_hash_table (info);
4651 if (ia64_info == NULL)
4652 return FALSE;
4654 dynobj = ia64_info->root.dynobj;
4656 if (ia64_info->root.dynamic_sections_created)
4658 ElfNN_External_Dyn *dyncon, *dynconend;
4659 asection *sdyn, *sgotplt;
4660 bfd_vma gp_val;
4662 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
4663 sgotplt = ia64_info->root.sgotplt;
4664 BFD_ASSERT (sdyn != NULL);
4665 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
4666 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
4668 gp_val = _bfd_get_gp_value (abfd);
4670 for (; dyncon < dynconend; dyncon++)
4672 Elf_Internal_Dyn dyn;
4674 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
4676 switch (dyn.d_tag)
4678 case DT_PLTGOT:
4679 dyn.d_un.d_ptr = gp_val;
4680 break;
4682 case DT_PLTRELSZ:
4683 dyn.d_un.d_val = (ia64_info->minplt_entries
4684 * sizeof (ElfNN_External_Rela));
4685 break;
4687 case DT_JMPREL:
4688 /* See the comment above in finish_dynamic_symbol. */
4689 dyn.d_un.d_ptr = (ia64_info->rel_pltoff_sec->output_section->vma
4690 + ia64_info->rel_pltoff_sec->output_offset
4691 + (ia64_info->rel_pltoff_sec->reloc_count
4692 * sizeof (ElfNN_External_Rela)));
4693 break;
4695 case DT_IA_64_PLT_RESERVE:
4696 dyn.d_un.d_ptr = (sgotplt->output_section->vma
4697 + sgotplt->output_offset);
4698 break;
4701 bfd_elfNN_swap_dyn_out (abfd, &dyn, dyncon);
4704 /* Initialize the PLT0 entry. */
4705 if (ia64_info->root.splt)
4707 bfd_byte *loc = ia64_info->root.splt->contents;
4708 bfd_vma pltres;
4710 memcpy (loc, plt_header, PLT_HEADER_SIZE);
4712 pltres = (sgotplt->output_section->vma
4713 + sgotplt->output_offset
4714 - gp_val);
4716 ia64_elf_install_value (loc+1, pltres, R_IA64_GPREL22);
4720 return TRUE;
4723 /* ELF file flag handling: */
4725 /* Function to keep IA-64 specific file flags. */
4726 static bfd_boolean
4727 elfNN_ia64_set_private_flags (bfd *abfd, flagword flags)
4729 BFD_ASSERT (!elf_flags_init (abfd)
4730 || elf_elfheader (abfd)->e_flags == flags);
4732 elf_elfheader (abfd)->e_flags = flags;
4733 elf_flags_init (abfd) = TRUE;
4734 return TRUE;
4737 /* Merge backend specific data from an object file to the output
4738 object file when linking. */
4739 static bfd_boolean
4740 elfNN_ia64_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
4742 bfd *obfd = info->output_bfd;
4743 flagword out_flags;
4744 flagword in_flags;
4745 bfd_boolean ok = TRUE;
4747 /* Don't even pretend to support mixed-format linking. */
4748 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4749 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4750 return FALSE;
4752 in_flags = elf_elfheader (ibfd)->e_flags;
4753 out_flags = elf_elfheader (obfd)->e_flags;
4755 if (! elf_flags_init (obfd))
4757 elf_flags_init (obfd) = TRUE;
4758 elf_elfheader (obfd)->e_flags = in_flags;
4760 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
4761 && bfd_get_arch_info (obfd)->the_default)
4763 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
4764 bfd_get_mach (ibfd));
4767 return TRUE;
4770 /* Check flag compatibility. */
4771 if (in_flags == out_flags)
4772 return TRUE;
4774 /* Output has EF_IA_64_REDUCEDFP set only if all inputs have it set. */
4775 if (!(in_flags & EF_IA_64_REDUCEDFP) && (out_flags & EF_IA_64_REDUCEDFP))
4776 elf_elfheader (obfd)->e_flags &= ~EF_IA_64_REDUCEDFP;
4778 if ((in_flags & EF_IA_64_TRAPNIL) != (out_flags & EF_IA_64_TRAPNIL))
4780 _bfd_error_handler
4781 (_("%pB: linking trap-on-NULL-dereference with non-trapping files"),
4782 ibfd);
4784 bfd_set_error (bfd_error_bad_value);
4785 ok = FALSE;
4787 if ((in_flags & EF_IA_64_BE) != (out_flags & EF_IA_64_BE))
4789 _bfd_error_handler
4790 (_("%pB: linking big-endian files with little-endian files"),
4791 ibfd);
4793 bfd_set_error (bfd_error_bad_value);
4794 ok = FALSE;
4796 if ((in_flags & EF_IA_64_ABI64) != (out_flags & EF_IA_64_ABI64))
4798 _bfd_error_handler
4799 (_("%pB: linking 64-bit files with 32-bit files"),
4800 ibfd);
4802 bfd_set_error (bfd_error_bad_value);
4803 ok = FALSE;
4805 if ((in_flags & EF_IA_64_CONS_GP) != (out_flags & EF_IA_64_CONS_GP))
4807 _bfd_error_handler
4808 (_("%pB: linking constant-gp files with non-constant-gp files"),
4809 ibfd);
4811 bfd_set_error (bfd_error_bad_value);
4812 ok = FALSE;
4814 if ((in_flags & EF_IA_64_NOFUNCDESC_CONS_GP)
4815 != (out_flags & EF_IA_64_NOFUNCDESC_CONS_GP))
4817 _bfd_error_handler
4818 (_("%pB: linking auto-pic files with non-auto-pic files"),
4819 ibfd);
4821 bfd_set_error (bfd_error_bad_value);
4822 ok = FALSE;
4825 return ok;
4828 static bfd_boolean
4829 elfNN_ia64_print_private_bfd_data (bfd *abfd, void * ptr)
4831 FILE *file = (FILE *) ptr;
4832 flagword flags = elf_elfheader (abfd)->e_flags;
4834 BFD_ASSERT (abfd != NULL && ptr != NULL);
4836 fprintf (file, "private flags = %s%s%s%s%s%s%s%s\n",
4837 (flags & EF_IA_64_TRAPNIL) ? "TRAPNIL, " : "",
4838 (flags & EF_IA_64_EXT) ? "EXT, " : "",
4839 (flags & EF_IA_64_BE) ? "BE, " : "LE, ",
4840 (flags & EF_IA_64_REDUCEDFP) ? "REDUCEDFP, " : "",
4841 (flags & EF_IA_64_CONS_GP) ? "CONS_GP, " : "",
4842 (flags & EF_IA_64_NOFUNCDESC_CONS_GP) ? "NOFUNCDESC_CONS_GP, " : "",
4843 (flags & EF_IA_64_ABSOLUTE) ? "ABSOLUTE, " : "",
4844 (flags & EF_IA_64_ABI64) ? "ABI64" : "ABI32");
4846 _bfd_elf_print_private_bfd_data (abfd, ptr);
4847 return TRUE;
4850 static enum elf_reloc_type_class
4851 elfNN_ia64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4852 const asection *rel_sec ATTRIBUTE_UNUSED,
4853 const Elf_Internal_Rela *rela)
4855 switch ((int) ELFNN_R_TYPE (rela->r_info))
4857 case R_IA64_REL32MSB:
4858 case R_IA64_REL32LSB:
4859 case R_IA64_REL64MSB:
4860 case R_IA64_REL64LSB:
4861 return reloc_class_relative;
4862 case R_IA64_IPLTMSB:
4863 case R_IA64_IPLTLSB:
4864 return reloc_class_plt;
4865 case R_IA64_COPY:
4866 return reloc_class_copy;
4867 default:
4868 return reloc_class_normal;
4872 static const struct bfd_elf_special_section elfNN_ia64_special_sections[] =
4874 { STRING_COMMA_LEN (".sbss"), -1, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT },
4875 { STRING_COMMA_LEN (".sdata"), -1, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT },
4876 { NULL, 0, 0, 0, 0 }
4879 static bfd_boolean
4880 elfNN_ia64_object_p (bfd *abfd)
4882 asection *sec;
4883 asection *group, *unwi, *unw;
4884 flagword flags;
4885 const char *name;
4886 char *unwi_name, *unw_name;
4887 bfd_size_type amt;
4889 if (abfd->flags & DYNAMIC)
4890 return TRUE;
4892 /* Flags for fake group section. */
4893 flags = (SEC_LINKER_CREATED | SEC_GROUP | SEC_LINK_ONCE
4894 | SEC_EXCLUDE);
4896 /* We add a fake section group for each .gnu.linkonce.t.* section,
4897 which isn't in a section group, and its unwind sections. */
4898 for (sec = abfd->sections; sec != NULL; sec = sec->next)
4900 if (elf_sec_group (sec) == NULL
4901 && ((sec->flags & (SEC_LINK_ONCE | SEC_CODE | SEC_GROUP))
4902 == (SEC_LINK_ONCE | SEC_CODE))
4903 && CONST_STRNEQ (sec->name, ".gnu.linkonce.t."))
4905 name = sec->name + 16;
4907 amt = strlen (name) + sizeof (".gnu.linkonce.ia64unwi.");
4908 unwi_name = bfd_alloc (abfd, amt);
4909 if (!unwi_name)
4910 return FALSE;
4912 strcpy (stpcpy (unwi_name, ".gnu.linkonce.ia64unwi."), name);
4913 unwi = bfd_get_section_by_name (abfd, unwi_name);
4915 amt = strlen (name) + sizeof (".gnu.linkonce.ia64unw.");
4916 unw_name = bfd_alloc (abfd, amt);
4917 if (!unw_name)
4918 return FALSE;
4920 strcpy (stpcpy (unw_name, ".gnu.linkonce.ia64unw."), name);
4921 unw = bfd_get_section_by_name (abfd, unw_name);
4923 /* We need to create a fake group section for it and its
4924 unwind sections. */
4925 group = bfd_make_section_anyway_with_flags (abfd, name,
4926 flags);
4927 if (group == NULL)
4928 return FALSE;
4930 /* Move the fake group section to the beginning. */
4931 bfd_section_list_remove (abfd, group);
4932 bfd_section_list_prepend (abfd, group);
4934 elf_next_in_group (group) = sec;
4936 elf_group_name (sec) = name;
4937 elf_next_in_group (sec) = sec;
4938 elf_sec_group (sec) = group;
4940 if (unwi)
4942 elf_group_name (unwi) = name;
4943 elf_next_in_group (unwi) = sec;
4944 elf_next_in_group (sec) = unwi;
4945 elf_sec_group (unwi) = group;
4948 if (unw)
4950 elf_group_name (unw) = name;
4951 if (unwi)
4953 elf_next_in_group (unw) = elf_next_in_group (unwi);
4954 elf_next_in_group (unwi) = unw;
4956 else
4958 elf_next_in_group (unw) = sec;
4959 elf_next_in_group (sec) = unw;
4961 elf_sec_group (unw) = group;
4964 /* Fake SHT_GROUP section header. */
4965 elf_section_data (group)->this_hdr.bfd_section = group;
4966 elf_section_data (group)->this_hdr.sh_type = SHT_GROUP;
4969 return TRUE;
4972 static bfd_boolean
4973 elfNN_ia64_hpux_vec (const bfd_target *vec)
4975 extern const bfd_target ia64_elfNN_hpux_be_vec;
4976 return (vec == &ia64_elfNN_hpux_be_vec);
4979 static void
4980 elfNN_hpux_post_process_headers (bfd *abfd,
4981 struct bfd_link_info *info ATTRIBUTE_UNUSED)
4983 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
4985 i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
4986 i_ehdrp->e_ident[EI_ABIVERSION] = 1;
4989 static bfd_boolean
4990 elfNN_hpux_backend_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
4991 asection *sec, int *retval)
4993 if (bfd_is_com_section (sec))
4995 *retval = SHN_IA_64_ANSI_COMMON;
4996 return TRUE;
4998 return FALSE;
5001 static void
5002 elfNN_hpux_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
5003 asymbol *asym)
5005 elf_symbol_type *elfsym = (elf_symbol_type *) asym;
5007 switch (elfsym->internal_elf_sym.st_shndx)
5009 case SHN_IA_64_ANSI_COMMON:
5010 asym->section = bfd_com_section_ptr;
5011 asym->value = elfsym->internal_elf_sym.st_size;
5012 asym->flags &= ~BSF_GLOBAL;
5013 break;
5017 #define TARGET_LITTLE_SYM ia64_elfNN_le_vec
5018 #define TARGET_LITTLE_NAME "elfNN-ia64-little"
5019 #define TARGET_BIG_SYM ia64_elfNN_be_vec
5020 #define TARGET_BIG_NAME "elfNN-ia64-big"
5021 #define ELF_ARCH bfd_arch_ia64
5022 #define ELF_TARGET_ID IA64_ELF_DATA
5023 #define ELF_MACHINE_CODE EM_IA_64
5024 #define ELF_MACHINE_ALT1 1999 /* EAS2.3 */
5025 #define ELF_MACHINE_ALT2 1998 /* EAS2.2 */
5026 #define ELF_MAXPAGESIZE 0x10000 /* 64KB */
5027 #define ELF_COMMONPAGESIZE 0x4000 /* 16KB */
5029 #define elf_backend_section_from_shdr \
5030 elfNN_ia64_section_from_shdr
5031 #define elf_backend_section_flags \
5032 elfNN_ia64_section_flags
5033 #define elf_backend_fake_sections \
5034 elfNN_ia64_fake_sections
5035 #define elf_backend_final_write_processing \
5036 elfNN_ia64_final_write_processing
5037 #define elf_backend_add_symbol_hook \
5038 elfNN_ia64_add_symbol_hook
5039 #define elf_backend_additional_program_headers \
5040 elfNN_ia64_additional_program_headers
5041 #define elf_backend_modify_segment_map \
5042 elfNN_ia64_modify_segment_map
5043 #define elf_backend_modify_program_headers \
5044 elfNN_ia64_modify_program_headers
5045 #define elf_info_to_howto \
5046 elfNN_ia64_info_to_howto
5048 #define bfd_elfNN_bfd_reloc_type_lookup \
5049 ia64_elf_reloc_type_lookup
5050 #define bfd_elfNN_bfd_reloc_name_lookup \
5051 ia64_elf_reloc_name_lookup
5052 #define bfd_elfNN_bfd_is_local_label_name \
5053 elfNN_ia64_is_local_label_name
5054 #define bfd_elfNN_bfd_relax_section \
5055 elfNN_ia64_relax_section
5057 #define elf_backend_object_p \
5058 elfNN_ia64_object_p
5060 /* Stuff for the BFD linker: */
5061 #define bfd_elfNN_bfd_link_hash_table_create \
5062 elfNN_ia64_hash_table_create
5063 #define elf_backend_create_dynamic_sections \
5064 elfNN_ia64_create_dynamic_sections
5065 #define elf_backend_check_relocs \
5066 elfNN_ia64_check_relocs
5067 #define elf_backend_adjust_dynamic_symbol \
5068 elfNN_ia64_adjust_dynamic_symbol
5069 #define elf_backend_size_dynamic_sections \
5070 elfNN_ia64_size_dynamic_sections
5071 #define elf_backend_omit_section_dynsym \
5072 _bfd_elf_omit_section_dynsym_all
5073 #define elf_backend_relocate_section \
5074 elfNN_ia64_relocate_section
5075 #define elf_backend_finish_dynamic_symbol \
5076 elfNN_ia64_finish_dynamic_symbol
5077 #define elf_backend_finish_dynamic_sections \
5078 elfNN_ia64_finish_dynamic_sections
5079 #define bfd_elfNN_bfd_final_link \
5080 elfNN_ia64_final_link
5082 #define bfd_elfNN_bfd_merge_private_bfd_data \
5083 elfNN_ia64_merge_private_bfd_data
5084 #define bfd_elfNN_bfd_set_private_flags \
5085 elfNN_ia64_set_private_flags
5086 #define bfd_elfNN_bfd_print_private_bfd_data \
5087 elfNN_ia64_print_private_bfd_data
5089 #define elf_backend_plt_readonly 1
5090 #define elf_backend_can_gc_sections 1
5091 #define elf_backend_want_plt_sym 0
5092 #define elf_backend_plt_alignment 5
5093 #define elf_backend_got_header_size 0
5094 #define elf_backend_want_got_plt 1
5095 #define elf_backend_may_use_rel_p 1
5096 #define elf_backend_may_use_rela_p 1
5097 #define elf_backend_default_use_rela_p 1
5098 #define elf_backend_want_dynbss 0
5099 #define elf_backend_copy_indirect_symbol elfNN_ia64_hash_copy_indirect
5100 #define elf_backend_hide_symbol elfNN_ia64_hash_hide_symbol
5101 #define elf_backend_fixup_symbol _bfd_elf_link_hash_fixup_symbol
5102 #define elf_backend_reloc_type_class elfNN_ia64_reloc_type_class
5103 #define elf_backend_rela_normal 1
5104 #define elf_backend_dtrel_excludes_plt 1
5105 #define elf_backend_special_sections elfNN_ia64_special_sections
5106 #define elf_backend_default_execstack 0
5108 /* FIXME: PR 290: The Intel C compiler generates SHT_IA_64_UNWIND with
5109 SHF_LINK_ORDER. But it doesn't set the sh_link or sh_info fields.
5110 We don't want to flood users with so many error messages. We turn
5111 off the warning for now. It will be turned on later when the Intel
5112 compiler is fixed. */
5113 #define elf_backend_link_order_error_handler NULL
5115 #include "elfNN-target.h"
5117 /* HPUX-specific vectors. */
5119 #undef TARGET_LITTLE_SYM
5120 #undef TARGET_LITTLE_NAME
5121 #undef TARGET_BIG_SYM
5122 #define TARGET_BIG_SYM ia64_elfNN_hpux_be_vec
5123 #undef TARGET_BIG_NAME
5124 #define TARGET_BIG_NAME "elfNN-ia64-hpux-big"
5126 /* These are HP-UX specific functions. */
5128 #undef elf_backend_post_process_headers
5129 #define elf_backend_post_process_headers elfNN_hpux_post_process_headers
5131 #undef elf_backend_section_from_bfd_section
5132 #define elf_backend_section_from_bfd_section elfNN_hpux_backend_section_from_bfd_section
5134 #undef elf_backend_symbol_processing
5135 #define elf_backend_symbol_processing elfNN_hpux_backend_symbol_processing
5137 #undef elf_backend_want_p_paddr_set_to_zero
5138 #define elf_backend_want_p_paddr_set_to_zero 1
5140 #undef ELF_COMMONPAGESIZE
5141 #undef ELF_OSABI
5142 #define ELF_OSABI ELFOSABI_HPUX
5144 #undef elfNN_bed
5145 #define elfNN_bed elfNN_ia64_hpux_bed
5147 #include "elfNN-target.h"