For N_SLINE only include function_start_offset if the symbol is within a
[binutils.git] / bfd / elf32-hppa.c
blob80e8b1861c1b222371aa3d3bf5208e0b44bd98a8
1 /* BFD back-end for HP PA-RISC ELF files.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001,
3 2002, 2003 Free Software Foundation, Inc.
5 Original code by
6 Center for Software Science
7 Department of Computer Science
8 University of Utah
9 Largely rewritten by Alan Modra <alan@linuxcare.com.au>
11 This file is part of BFD, the Binary File Descriptor library.
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 #include "bfd.h"
28 #include "sysdep.h"
29 #include "libbfd.h"
30 #include "elf-bfd.h"
31 #include "elf/hppa.h"
32 #include "libhppa.h"
33 #include "elf32-hppa.h"
34 #define ARCH_SIZE 32
35 #include "elf32-hppa.h"
36 #include "elf-hppa.h"
38 /* In order to gain some understanding of code in this file without
39 knowing all the intricate details of the linker, note the
40 following:
42 Functions named elf32_hppa_* are called by external routines, other
43 functions are only called locally. elf32_hppa_* functions appear
44 in this file more or less in the order in which they are called
45 from external routines. eg. elf32_hppa_check_relocs is called
46 early in the link process, elf32_hppa_finish_dynamic_sections is
47 one of the last functions. */
49 /* We use two hash tables to hold information for linking PA ELF objects.
51 The first is the elf32_hppa_link_hash_table which is derived
52 from the standard ELF linker hash table. We use this as a place to
53 attach other hash tables and static information.
55 The second is the stub hash table which is derived from the
56 base BFD hash table. The stub hash table holds the information
57 necessary to build the linker stubs during a link.
59 There are a number of different stubs generated by the linker.
61 Long branch stub:
62 : ldil LR'X,%r1
63 : be,n RR'X(%sr4,%r1)
65 PIC long branch stub:
66 : b,l .+8,%r1
67 : addil LR'X - ($PIC_pcrel$0 - 4),%r1
68 : be,n RR'X - ($PIC_pcrel$0 - 8)(%sr4,%r1)
70 Import stub to call shared library routine from normal object file
71 (single sub-space version)
72 : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point
73 : ldw RR'lt_ptr+ltoff(%r1),%r21
74 : bv %r0(%r21)
75 : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value.
77 Import stub to call shared library routine from shared library
78 (single sub-space version)
79 : addil LR'ltoff,%r19 ; get procedure entry point
80 : ldw RR'ltoff(%r1),%r21
81 : bv %r0(%r21)
82 : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value.
84 Import stub to call shared library routine from normal object file
85 (multiple sub-space support)
86 : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point
87 : ldw RR'lt_ptr+ltoff(%r1),%r21
88 : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value.
89 : ldsid (%r21),%r1
90 : mtsp %r1,%sr0
91 : be 0(%sr0,%r21) ; branch to target
92 : stw %rp,-24(%sp) ; save rp
94 Import stub to call shared library routine from shared library
95 (multiple sub-space support)
96 : addil LR'ltoff,%r19 ; get procedure entry point
97 : ldw RR'ltoff(%r1),%r21
98 : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value.
99 : ldsid (%r21),%r1
100 : mtsp %r1,%sr0
101 : be 0(%sr0,%r21) ; branch to target
102 : stw %rp,-24(%sp) ; save rp
104 Export stub to return from shared lib routine (multiple sub-space support)
105 One of these is created for each exported procedure in a shared
106 library (and stored in the shared lib). Shared lib routines are
107 called via the first instruction in the export stub so that we can
108 do an inter-space return. Not required for single sub-space.
109 : bl,n X,%rp ; trap the return
110 : nop
111 : ldw -24(%sp),%rp ; restore the original rp
112 : ldsid (%rp),%r1
113 : mtsp %r1,%sr0
114 : be,n 0(%sr0,%rp) ; inter-space return */
116 #define PLT_ENTRY_SIZE 8
117 #define GOT_ENTRY_SIZE 4
118 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
120 static const bfd_byte plt_stub[] =
122 0x0e, 0x80, 0x10, 0x96, /* 1: ldw 0(%r20),%r22 */
123 0xea, 0xc0, 0xc0, 0x00, /* bv %r0(%r22) */
124 0x0e, 0x88, 0x10, 0x95, /* ldw 4(%r20),%r21 */
125 #define PLT_STUB_ENTRY (3*4)
126 0xea, 0x9f, 0x1f, 0xdd, /* b,l 1b,%r20 */
127 0xd6, 0x80, 0x1c, 0x1e, /* depi 0,31,2,%r20 */
128 0x00, 0xc0, 0xff, 0xee, /* 9: .word fixup_func */
129 0xde, 0xad, 0xbe, 0xef /* .word fixup_ltp */
132 /* Section name for stubs is the associated section name plus this
133 string. */
134 #define STUB_SUFFIX ".stub"
136 /* We don't need to copy certain PC- or GP-relative dynamic relocs
137 into a shared object's dynamic section. All the relocs of the
138 limited class we are interested in, are absolute. */
139 #ifndef RELATIVE_DYNRELOCS
140 #define RELATIVE_DYNRELOCS 0
141 #define IS_ABSOLUTE_RELOC(r_type) 1
142 #endif
144 enum elf32_hppa_stub_type {
145 hppa_stub_long_branch,
146 hppa_stub_long_branch_shared,
147 hppa_stub_import,
148 hppa_stub_import_shared,
149 hppa_stub_export,
150 hppa_stub_none
153 struct elf32_hppa_stub_hash_entry {
155 /* Base hash table entry structure. */
156 struct bfd_hash_entry root;
158 /* The stub section. */
159 asection *stub_sec;
161 /* Offset within stub_sec of the beginning of this stub. */
162 bfd_vma stub_offset;
164 /* Given the symbol's value and its section we can determine its final
165 value when building the stubs (so the stub knows where to jump. */
166 bfd_vma target_value;
167 asection *target_section;
169 enum elf32_hppa_stub_type stub_type;
171 /* The symbol table entry, if any, that this was derived from. */
172 struct elf32_hppa_link_hash_entry *h;
174 /* Where this stub is being called from, or, in the case of combined
175 stub sections, the first input section in the group. */
176 asection *id_sec;
179 struct elf32_hppa_link_hash_entry {
181 struct elf_link_hash_entry elf;
183 /* A pointer to the most recently used stub hash entry against this
184 symbol. */
185 struct elf32_hppa_stub_hash_entry *stub_cache;
187 /* Used to count relocations for delayed sizing of relocation
188 sections. */
189 struct elf32_hppa_dyn_reloc_entry {
191 /* Next relocation in the chain. */
192 struct elf32_hppa_dyn_reloc_entry *next;
194 /* The input section of the reloc. */
195 asection *sec;
197 /* Number of relocs copied in this section. */
198 bfd_size_type count;
200 #if RELATIVE_DYNRELOCS
201 /* Number of relative relocs copied for the input section. */
202 bfd_size_type relative_count;
203 #endif
204 } *dyn_relocs;
206 /* Set if the only reason we need a .plt entry is for a non-PIC to
207 PIC function call. */
208 unsigned int pic_call:1;
210 /* Set if this symbol is used by a plabel reloc. */
211 unsigned int plabel:1;
214 struct elf32_hppa_link_hash_table {
216 /* The main hash table. */
217 struct elf_link_hash_table elf;
219 /* The stub hash table. */
220 struct bfd_hash_table stub_hash_table;
222 /* Linker stub bfd. */
223 bfd *stub_bfd;
225 /* Linker call-backs. */
226 asection * (*add_stub_section) PARAMS ((const char *, asection *));
227 void (*layout_sections_again) PARAMS ((void));
229 /* Array to keep track of which stub sections have been created, and
230 information on stub grouping. */
231 struct map_stub {
232 /* This is the section to which stubs in the group will be
233 attached. */
234 asection *link_sec;
235 /* The stub section. */
236 asection *stub_sec;
237 } *stub_group;
239 /* Assorted information used by elf32_hppa_size_stubs. */
240 unsigned int bfd_count;
241 int top_index;
242 asection **input_list;
243 Elf_Internal_Sym **all_local_syms;
245 /* Short-cuts to get to dynamic linker sections. */
246 asection *sgot;
247 asection *srelgot;
248 asection *splt;
249 asection *srelplt;
250 asection *sdynbss;
251 asection *srelbss;
253 /* Used during a final link to store the base of the text and data
254 segments so that we can perform SEGREL relocations. */
255 bfd_vma text_segment_base;
256 bfd_vma data_segment_base;
258 /* Whether we support multiple sub-spaces for shared libs. */
259 unsigned int multi_subspace:1;
261 /* Flags set when various size branches are detected. Used to
262 select suitable defaults for the stub group size. */
263 unsigned int has_12bit_branch:1;
264 unsigned int has_17bit_branch:1;
265 unsigned int has_22bit_branch:1;
267 /* Set if we need a .plt stub to support lazy dynamic linking. */
268 unsigned int need_plt_stub:1;
270 /* Small local sym to section mapping cache. */
271 struct sym_sec_cache sym_sec;
274 /* Various hash macros and functions. */
275 #define hppa_link_hash_table(p) \
276 ((struct elf32_hppa_link_hash_table *) ((p)->hash))
278 #define hppa_stub_hash_lookup(table, string, create, copy) \
279 ((struct elf32_hppa_stub_hash_entry *) \
280 bfd_hash_lookup ((table), (string), (create), (copy)))
282 static struct bfd_hash_entry *stub_hash_newfunc
283 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
285 static struct bfd_hash_entry *hppa_link_hash_newfunc
286 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
288 static struct bfd_link_hash_table *elf32_hppa_link_hash_table_create
289 PARAMS ((bfd *));
291 static void elf32_hppa_link_hash_table_free
292 PARAMS ((struct bfd_link_hash_table *));
294 /* Stub handling functions. */
295 static char *hppa_stub_name
296 PARAMS ((const asection *, const asection *,
297 const struct elf32_hppa_link_hash_entry *,
298 const Elf_Internal_Rela *));
300 static struct elf32_hppa_stub_hash_entry *hppa_get_stub_entry
301 PARAMS ((const asection *, const asection *,
302 struct elf32_hppa_link_hash_entry *,
303 const Elf_Internal_Rela *,
304 struct elf32_hppa_link_hash_table *));
306 static struct elf32_hppa_stub_hash_entry *hppa_add_stub
307 PARAMS ((const char *, asection *, struct elf32_hppa_link_hash_table *));
309 static enum elf32_hppa_stub_type hppa_type_of_stub
310 PARAMS ((asection *, const Elf_Internal_Rela *,
311 struct elf32_hppa_link_hash_entry *, bfd_vma));
313 static bfd_boolean hppa_build_one_stub
314 PARAMS ((struct bfd_hash_entry *, PTR));
316 static bfd_boolean hppa_size_one_stub
317 PARAMS ((struct bfd_hash_entry *, PTR));
319 /* BFD and elf backend functions. */
320 static bfd_boolean elf32_hppa_object_p PARAMS ((bfd *));
322 static bfd_boolean elf32_hppa_add_symbol_hook
323 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
324 const char **, flagword *, asection **, bfd_vma *));
326 static bfd_boolean elf32_hppa_create_dynamic_sections
327 PARAMS ((bfd *, struct bfd_link_info *));
329 static void elf32_hppa_copy_indirect_symbol
330 PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
331 struct elf_link_hash_entry *));
333 static bfd_boolean elf32_hppa_check_relocs
334 PARAMS ((bfd *, struct bfd_link_info *,
335 asection *, const Elf_Internal_Rela *));
337 static asection *elf32_hppa_gc_mark_hook
338 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
339 struct elf_link_hash_entry *, Elf_Internal_Sym *));
341 static bfd_boolean elf32_hppa_gc_sweep_hook
342 PARAMS ((bfd *, struct bfd_link_info *,
343 asection *, const Elf_Internal_Rela *));
345 static void elf32_hppa_hide_symbol
346 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
348 static bfd_boolean elf32_hppa_adjust_dynamic_symbol
349 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
351 static bfd_boolean mark_PIC_calls
352 PARAMS ((struct elf_link_hash_entry *, PTR));
354 static bfd_boolean allocate_plt_static
355 PARAMS ((struct elf_link_hash_entry *, PTR));
357 static bfd_boolean allocate_dynrelocs
358 PARAMS ((struct elf_link_hash_entry *, PTR));
360 static bfd_boolean readonly_dynrelocs
361 PARAMS ((struct elf_link_hash_entry *, PTR));
363 static bfd_boolean clobber_millicode_symbols
364 PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *));
366 static bfd_boolean elf32_hppa_size_dynamic_sections
367 PARAMS ((bfd *, struct bfd_link_info *));
369 static void group_sections
370 PARAMS ((struct elf32_hppa_link_hash_table *, bfd_size_type, bfd_boolean));
372 static int get_local_syms
373 PARAMS ((bfd *, bfd *, struct bfd_link_info *));
375 static bfd_boolean elf32_hppa_final_link
376 PARAMS ((bfd *, struct bfd_link_info *));
378 static void hppa_record_segment_addr
379 PARAMS ((bfd *, asection *, PTR));
381 static bfd_reloc_status_type final_link_relocate
382 PARAMS ((asection *, bfd_byte *, const Elf_Internal_Rela *,
383 bfd_vma, struct elf32_hppa_link_hash_table *, asection *,
384 struct elf32_hppa_link_hash_entry *));
386 static bfd_boolean elf32_hppa_relocate_section
387 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
388 bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
390 static bfd_boolean elf32_hppa_finish_dynamic_symbol
391 PARAMS ((bfd *, struct bfd_link_info *,
392 struct elf_link_hash_entry *, Elf_Internal_Sym *));
394 static enum elf_reloc_type_class elf32_hppa_reloc_type_class
395 PARAMS ((const Elf_Internal_Rela *));
397 static bfd_boolean elf32_hppa_finish_dynamic_sections
398 PARAMS ((bfd *, struct bfd_link_info *));
400 static void elf32_hppa_post_process_headers
401 PARAMS ((bfd *, struct bfd_link_info *));
403 static int elf32_hppa_elf_get_symbol_type
404 PARAMS ((Elf_Internal_Sym *, int));
406 /* Assorted hash table functions. */
408 /* Initialize an entry in the stub hash table. */
410 static struct bfd_hash_entry *
411 stub_hash_newfunc (entry, table, string)
412 struct bfd_hash_entry *entry;
413 struct bfd_hash_table *table;
414 const char *string;
416 /* Allocate the structure if it has not already been allocated by a
417 subclass. */
418 if (entry == NULL)
420 entry = bfd_hash_allocate (table,
421 sizeof (struct elf32_hppa_stub_hash_entry));
422 if (entry == NULL)
423 return entry;
426 /* Call the allocation method of the superclass. */
427 entry = bfd_hash_newfunc (entry, table, string);
428 if (entry != NULL)
430 struct elf32_hppa_stub_hash_entry *eh;
432 /* Initialize the local fields. */
433 eh = (struct elf32_hppa_stub_hash_entry *) entry;
434 eh->stub_sec = NULL;
435 eh->stub_offset = 0;
436 eh->target_value = 0;
437 eh->target_section = NULL;
438 eh->stub_type = hppa_stub_long_branch;
439 eh->h = NULL;
440 eh->id_sec = NULL;
443 return entry;
446 /* Initialize an entry in the link hash table. */
448 static struct bfd_hash_entry *
449 hppa_link_hash_newfunc (entry, table, string)
450 struct bfd_hash_entry *entry;
451 struct bfd_hash_table *table;
452 const char *string;
454 /* Allocate the structure if it has not already been allocated by a
455 subclass. */
456 if (entry == NULL)
458 entry = bfd_hash_allocate (table,
459 sizeof (struct elf32_hppa_link_hash_entry));
460 if (entry == NULL)
461 return entry;
464 /* Call the allocation method of the superclass. */
465 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
466 if (entry != NULL)
468 struct elf32_hppa_link_hash_entry *eh;
470 /* Initialize the local fields. */
471 eh = (struct elf32_hppa_link_hash_entry *) entry;
472 eh->stub_cache = NULL;
473 eh->dyn_relocs = NULL;
474 eh->pic_call = 0;
475 eh->plabel = 0;
478 return entry;
481 /* Create the derived linker hash table. The PA ELF port uses the derived
482 hash table to keep information specific to the PA ELF linker (without
483 using static variables). */
485 static struct bfd_link_hash_table *
486 elf32_hppa_link_hash_table_create (abfd)
487 bfd *abfd;
489 struct elf32_hppa_link_hash_table *ret;
490 bfd_size_type amt = sizeof (*ret);
492 ret = (struct elf32_hppa_link_hash_table *) bfd_malloc (amt);
493 if (ret == NULL)
494 return NULL;
496 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, hppa_link_hash_newfunc))
498 free (ret);
499 return NULL;
502 /* Init the stub hash table too. */
503 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc))
504 return NULL;
506 ret->stub_bfd = NULL;
507 ret->add_stub_section = NULL;
508 ret->layout_sections_again = NULL;
509 ret->stub_group = NULL;
510 ret->sgot = NULL;
511 ret->srelgot = NULL;
512 ret->splt = NULL;
513 ret->srelplt = NULL;
514 ret->sdynbss = NULL;
515 ret->srelbss = NULL;
516 ret->text_segment_base = (bfd_vma) -1;
517 ret->data_segment_base = (bfd_vma) -1;
518 ret->multi_subspace = 0;
519 ret->has_12bit_branch = 0;
520 ret->has_17bit_branch = 0;
521 ret->has_22bit_branch = 0;
522 ret->need_plt_stub = 0;
523 ret->sym_sec.abfd = NULL;
525 return &ret->elf.root;
528 /* Free the derived linker hash table. */
530 static void
531 elf32_hppa_link_hash_table_free (hash)
532 struct bfd_link_hash_table *hash;
534 struct elf32_hppa_link_hash_table *ret
535 = (struct elf32_hppa_link_hash_table *) hash;
537 bfd_hash_table_free (&ret->stub_hash_table);
538 _bfd_generic_link_hash_table_free (hash);
541 /* Build a name for an entry in the stub hash table. */
543 static char *
544 hppa_stub_name (input_section, sym_sec, hash, rel)
545 const asection *input_section;
546 const asection *sym_sec;
547 const struct elf32_hppa_link_hash_entry *hash;
548 const Elf_Internal_Rela *rel;
550 char *stub_name;
551 bfd_size_type len;
553 if (hash)
555 len = 8 + 1 + strlen (hash->elf.root.root.string) + 1 + 8 + 1;
556 stub_name = bfd_malloc (len);
557 if (stub_name != NULL)
559 sprintf (stub_name, "%08x_%s+%x",
560 input_section->id & 0xffffffff,
561 hash->elf.root.root.string,
562 (int) rel->r_addend & 0xffffffff);
565 else
567 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
568 stub_name = bfd_malloc (len);
569 if (stub_name != NULL)
571 sprintf (stub_name, "%08x_%x:%x+%x",
572 input_section->id & 0xffffffff,
573 sym_sec->id & 0xffffffff,
574 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
575 (int) rel->r_addend & 0xffffffff);
578 return stub_name;
581 /* Look up an entry in the stub hash. Stub entries are cached because
582 creating the stub name takes a bit of time. */
584 static struct elf32_hppa_stub_hash_entry *
585 hppa_get_stub_entry (input_section, sym_sec, hash, rel, htab)
586 const asection *input_section;
587 const asection *sym_sec;
588 struct elf32_hppa_link_hash_entry *hash;
589 const Elf_Internal_Rela *rel;
590 struct elf32_hppa_link_hash_table *htab;
592 struct elf32_hppa_stub_hash_entry *stub_entry;
593 const asection *id_sec;
595 /* If this input section is part of a group of sections sharing one
596 stub section, then use the id of the first section in the group.
597 Stub names need to include a section id, as there may well be
598 more than one stub used to reach say, printf, and we need to
599 distinguish between them. */
600 id_sec = htab->stub_group[input_section->id].link_sec;
602 if (hash != NULL && hash->stub_cache != NULL
603 && hash->stub_cache->h == hash
604 && hash->stub_cache->id_sec == id_sec)
606 stub_entry = hash->stub_cache;
608 else
610 char *stub_name;
612 stub_name = hppa_stub_name (id_sec, sym_sec, hash, rel);
613 if (stub_name == NULL)
614 return NULL;
616 stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table,
617 stub_name, FALSE, FALSE);
618 if (hash != NULL)
619 hash->stub_cache = stub_entry;
621 free (stub_name);
624 return stub_entry;
627 /* Add a new stub entry to the stub hash. Not all fields of the new
628 stub entry are initialised. */
630 static struct elf32_hppa_stub_hash_entry *
631 hppa_add_stub (stub_name, section, htab)
632 const char *stub_name;
633 asection *section;
634 struct elf32_hppa_link_hash_table *htab;
636 asection *link_sec;
637 asection *stub_sec;
638 struct elf32_hppa_stub_hash_entry *stub_entry;
640 link_sec = htab->stub_group[section->id].link_sec;
641 stub_sec = htab->stub_group[section->id].stub_sec;
642 if (stub_sec == NULL)
644 stub_sec = htab->stub_group[link_sec->id].stub_sec;
645 if (stub_sec == NULL)
647 size_t namelen;
648 bfd_size_type len;
649 char *s_name;
651 namelen = strlen (link_sec->name);
652 len = namelen + sizeof (STUB_SUFFIX);
653 s_name = bfd_alloc (htab->stub_bfd, len);
654 if (s_name == NULL)
655 return NULL;
657 memcpy (s_name, link_sec->name, namelen);
658 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
659 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
660 if (stub_sec == NULL)
661 return NULL;
662 htab->stub_group[link_sec->id].stub_sec = stub_sec;
664 htab->stub_group[section->id].stub_sec = stub_sec;
667 /* Enter this entry into the linker stub hash table. */
668 stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table, stub_name,
669 TRUE, FALSE);
670 if (stub_entry == NULL)
672 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
673 bfd_archive_filename (section->owner),
674 stub_name);
675 return NULL;
678 stub_entry->stub_sec = stub_sec;
679 stub_entry->stub_offset = 0;
680 stub_entry->id_sec = link_sec;
681 return stub_entry;
684 /* Determine the type of stub needed, if any, for a call. */
686 static enum elf32_hppa_stub_type
687 hppa_type_of_stub (input_sec, rel, hash, destination)
688 asection *input_sec;
689 const Elf_Internal_Rela *rel;
690 struct elf32_hppa_link_hash_entry *hash;
691 bfd_vma destination;
693 bfd_vma location;
694 bfd_vma branch_offset;
695 bfd_vma max_branch_offset;
696 unsigned int r_type;
698 if (hash != NULL
699 && hash->elf.plt.offset != (bfd_vma) -1
700 && (hash->elf.dynindx != -1 || hash->pic_call)
701 && !hash->plabel)
703 /* We need an import stub. Decide between hppa_stub_import
704 and hppa_stub_import_shared later. */
705 return hppa_stub_import;
708 /* Determine where the call point is. */
709 location = (input_sec->output_offset
710 + input_sec->output_section->vma
711 + rel->r_offset);
713 branch_offset = destination - location - 8;
714 r_type = ELF32_R_TYPE (rel->r_info);
716 /* Determine if a long branch stub is needed. parisc branch offsets
717 are relative to the second instruction past the branch, ie. +8
718 bytes on from the branch instruction location. The offset is
719 signed and counts in units of 4 bytes. */
720 if (r_type == (unsigned int) R_PARISC_PCREL17F)
722 max_branch_offset = (1 << (17-1)) << 2;
724 else if (r_type == (unsigned int) R_PARISC_PCREL12F)
726 max_branch_offset = (1 << (12-1)) << 2;
728 else /* R_PARISC_PCREL22F. */
730 max_branch_offset = (1 << (22-1)) << 2;
733 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
734 return hppa_stub_long_branch;
736 return hppa_stub_none;
739 /* Build one linker stub as defined by the stub hash table entry GEN_ENTRY.
740 IN_ARG contains the link info pointer. */
742 #define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */
743 #define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */
745 #define BL_R1 0xe8200000 /* b,l .+8,%r1 */
746 #define ADDIL_R1 0x28200000 /* addil LR'XXX,%r1,%r1 */
747 #define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */
749 #define ADDIL_DP 0x2b600000 /* addil LR'XXX,%dp,%r1 */
750 #define LDW_R1_R21 0x48350000 /* ldw RR'XXX(%sr0,%r1),%r21 */
751 #define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */
752 #define LDW_R1_R19 0x48330000 /* ldw RR'XXX(%sr0,%r1),%r19 */
754 #define ADDIL_R19 0x2a600000 /* addil LR'XXX,%r19,%r1 */
755 #define LDW_R1_DP 0x483b0000 /* ldw RR'XXX(%sr0,%r1),%dp */
757 #define LDSID_R21_R1 0x02a010a1 /* ldsid (%sr0,%r21),%r1 */
758 #define MTSP_R1 0x00011820 /* mtsp %r1,%sr0 */
759 #define BE_SR0_R21 0xe2a00000 /* be 0(%sr0,%r21) */
760 #define STW_RP 0x6bc23fd1 /* stw %rp,-24(%sr0,%sp) */
762 #define BL22_RP 0xe800a002 /* b,l,n XXX,%rp */
763 #define BL_RP 0xe8400002 /* b,l,n XXX,%rp */
764 #define NOP 0x08000240 /* nop */
765 #define LDW_RP 0x4bc23fd1 /* ldw -24(%sr0,%sp),%rp */
766 #define LDSID_RP_R1 0x004010a1 /* ldsid (%sr0,%rp),%r1 */
767 #define BE_SR0_RP 0xe0400002 /* be,n 0(%sr0,%rp) */
769 #ifndef R19_STUBS
770 #define R19_STUBS 1
771 #endif
773 #if R19_STUBS
774 #define LDW_R1_DLT LDW_R1_R19
775 #else
776 #define LDW_R1_DLT LDW_R1_DP
777 #endif
779 static bfd_boolean
780 hppa_build_one_stub (gen_entry, in_arg)
781 struct bfd_hash_entry *gen_entry;
782 PTR in_arg;
784 struct elf32_hppa_stub_hash_entry *stub_entry;
785 struct bfd_link_info *info;
786 struct elf32_hppa_link_hash_table *htab;
787 asection *stub_sec;
788 bfd *stub_bfd;
789 bfd_byte *loc;
790 bfd_vma sym_value;
791 bfd_vma insn;
792 bfd_vma off;
793 int val;
794 int size;
796 /* Massage our args to the form they really have. */
797 stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
798 info = (struct bfd_link_info *) in_arg;
800 htab = hppa_link_hash_table (info);
801 stub_sec = stub_entry->stub_sec;
803 /* Make a note of the offset within the stubs for this entry. */
804 stub_entry->stub_offset = stub_sec->_raw_size;
805 loc = stub_sec->contents + stub_entry->stub_offset;
807 stub_bfd = stub_sec->owner;
809 switch (stub_entry->stub_type)
811 case hppa_stub_long_branch:
812 /* Create the long branch. A long branch is formed with "ldil"
813 loading the upper bits of the target address into a register,
814 then branching with "be" which adds in the lower bits.
815 The "be" has its delay slot nullified. */
816 sym_value = (stub_entry->target_value
817 + stub_entry->target_section->output_offset
818 + stub_entry->target_section->output_section->vma);
820 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel);
821 insn = hppa_rebuild_insn ((int) LDIL_R1, val, 21);
822 bfd_put_32 (stub_bfd, insn, loc);
824 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel) >> 2;
825 insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
826 bfd_put_32 (stub_bfd, insn, loc + 4);
828 size = 8;
829 break;
831 case hppa_stub_long_branch_shared:
832 /* Branches are relative. This is where we are going to. */
833 sym_value = (stub_entry->target_value
834 + stub_entry->target_section->output_offset
835 + stub_entry->target_section->output_section->vma);
837 /* And this is where we are coming from, more or less. */
838 sym_value -= (stub_entry->stub_offset
839 + stub_sec->output_offset
840 + stub_sec->output_section->vma);
842 bfd_put_32 (stub_bfd, (bfd_vma) BL_R1, loc);
843 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_lrsel);
844 insn = hppa_rebuild_insn ((int) ADDIL_R1, val, 21);
845 bfd_put_32 (stub_bfd, insn, loc + 4);
847 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_rrsel) >> 2;
848 insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
849 bfd_put_32 (stub_bfd, insn, loc + 8);
850 size = 12;
851 break;
853 case hppa_stub_import:
854 case hppa_stub_import_shared:
855 off = stub_entry->h->elf.plt.offset;
856 if (off >= (bfd_vma) -2)
857 abort ();
859 off &= ~ (bfd_vma) 1;
860 sym_value = (off
861 + htab->splt->output_offset
862 + htab->splt->output_section->vma
863 - elf_gp (htab->splt->output_section->owner));
865 insn = ADDIL_DP;
866 #if R19_STUBS
867 if (stub_entry->stub_type == hppa_stub_import_shared)
868 insn = ADDIL_R19;
869 #endif
870 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel),
871 insn = hppa_rebuild_insn ((int) insn, val, 21);
872 bfd_put_32 (stub_bfd, insn, loc);
874 /* It is critical to use lrsel/rrsel here because we are using
875 two different offsets (+0 and +4) from sym_value. If we use
876 lsel/rsel then with unfortunate sym_values we will round
877 sym_value+4 up to the next 2k block leading to a mis-match
878 between the lsel and rsel value. */
879 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel);
880 insn = hppa_rebuild_insn ((int) LDW_R1_R21, val, 14);
881 bfd_put_32 (stub_bfd, insn, loc + 4);
883 if (htab->multi_subspace)
885 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
886 insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
887 bfd_put_32 (stub_bfd, insn, loc + 8);
889 bfd_put_32 (stub_bfd, (bfd_vma) LDSID_R21_R1, loc + 12);
890 bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
891 bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_R21, loc + 20);
892 bfd_put_32 (stub_bfd, (bfd_vma) STW_RP, loc + 24);
894 size = 28;
896 else
898 bfd_put_32 (stub_bfd, (bfd_vma) BV_R0_R21, loc + 8);
899 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
900 insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
901 bfd_put_32 (stub_bfd, insn, loc + 12);
903 size = 16;
906 if (!info->shared
907 && stub_entry->h != NULL
908 && stub_entry->h->pic_call)
910 /* Build the .plt entry needed to call a PIC function from
911 statically linked code. We don't need any relocs. */
912 bfd *dynobj;
913 struct elf32_hppa_link_hash_entry *eh;
914 bfd_vma value;
916 dynobj = htab->elf.dynobj;
917 eh = (struct elf32_hppa_link_hash_entry *) stub_entry->h;
919 if (eh->elf.root.type != bfd_link_hash_defined
920 && eh->elf.root.type != bfd_link_hash_defweak)
921 abort ();
923 value = (eh->elf.root.u.def.value
924 + eh->elf.root.u.def.section->output_offset
925 + eh->elf.root.u.def.section->output_section->vma);
927 /* Fill in the entry in the procedure linkage table.
929 The format of a plt entry is
930 <funcaddr>
931 <__gp>. */
933 bfd_put_32 (htab->splt->owner, value,
934 htab->splt->contents + off);
935 value = elf_gp (htab->splt->output_section->owner);
936 bfd_put_32 (htab->splt->owner, value,
937 htab->splt->contents + off + 4);
939 break;
941 case hppa_stub_export:
942 /* Branches are relative. This is where we are going to. */
943 sym_value = (stub_entry->target_value
944 + stub_entry->target_section->output_offset
945 + stub_entry->target_section->output_section->vma);
947 /* And this is where we are coming from. */
948 sym_value -= (stub_entry->stub_offset
949 + stub_sec->output_offset
950 + stub_sec->output_section->vma);
952 if (sym_value - 8 + (1 << (17 + 1)) >= (1 << (17 + 2))
953 && (!htab->has_22bit_branch
954 || sym_value - 8 + (1 << (22 + 1)) >= (1 << (22 + 2))))
956 (*_bfd_error_handler)
957 (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
958 bfd_archive_filename (stub_entry->target_section->owner),
959 stub_sec->name,
960 (long) stub_entry->stub_offset,
961 stub_entry->root.string);
962 bfd_set_error (bfd_error_bad_value);
963 return FALSE;
966 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_fsel) >> 2;
967 if (!htab->has_22bit_branch)
968 insn = hppa_rebuild_insn ((int) BL_RP, val, 17);
969 else
970 insn = hppa_rebuild_insn ((int) BL22_RP, val, 22);
971 bfd_put_32 (stub_bfd, insn, loc);
973 bfd_put_32 (stub_bfd, (bfd_vma) NOP, loc + 4);
974 bfd_put_32 (stub_bfd, (bfd_vma) LDW_RP, loc + 8);
975 bfd_put_32 (stub_bfd, (bfd_vma) LDSID_RP_R1, loc + 12);
976 bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
977 bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_RP, loc + 20);
979 /* Point the function symbol at the stub. */
980 stub_entry->h->elf.root.u.def.section = stub_sec;
981 stub_entry->h->elf.root.u.def.value = stub_sec->_raw_size;
983 size = 24;
984 break;
986 default:
987 BFD_FAIL ();
988 return FALSE;
991 stub_sec->_raw_size += size;
992 return TRUE;
995 #undef LDIL_R1
996 #undef BE_SR4_R1
997 #undef BL_R1
998 #undef ADDIL_R1
999 #undef DEPI_R1
1000 #undef ADDIL_DP
1001 #undef LDW_R1_R21
1002 #undef LDW_R1_DLT
1003 #undef LDW_R1_R19
1004 #undef ADDIL_R19
1005 #undef LDW_R1_DP
1006 #undef LDSID_R21_R1
1007 #undef MTSP_R1
1008 #undef BE_SR0_R21
1009 #undef STW_RP
1010 #undef BV_R0_R21
1011 #undef BL_RP
1012 #undef NOP
1013 #undef LDW_RP
1014 #undef LDSID_RP_R1
1015 #undef BE_SR0_RP
1017 /* As above, but don't actually build the stub. Just bump offset so
1018 we know stub section sizes. */
1020 static bfd_boolean
1021 hppa_size_one_stub (gen_entry, in_arg)
1022 struct bfd_hash_entry *gen_entry;
1023 PTR in_arg;
1025 struct elf32_hppa_stub_hash_entry *stub_entry;
1026 struct elf32_hppa_link_hash_table *htab;
1027 int size;
1029 /* Massage our args to the form they really have. */
1030 stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
1031 htab = (struct elf32_hppa_link_hash_table *) in_arg;
1033 if (stub_entry->stub_type == hppa_stub_long_branch)
1034 size = 8;
1035 else if (stub_entry->stub_type == hppa_stub_long_branch_shared)
1036 size = 12;
1037 else if (stub_entry->stub_type == hppa_stub_export)
1038 size = 24;
1039 else /* hppa_stub_import or hppa_stub_import_shared. */
1041 if (htab->multi_subspace)
1042 size = 28;
1043 else
1044 size = 16;
1047 stub_entry->stub_sec->_raw_size += size;
1048 return TRUE;
1051 /* Return nonzero if ABFD represents an HPPA ELF32 file.
1052 Additionally we set the default architecture and machine. */
1054 static bfd_boolean
1055 elf32_hppa_object_p (abfd)
1056 bfd *abfd;
1058 Elf_Internal_Ehdr * i_ehdrp;
1059 unsigned int flags;
1061 i_ehdrp = elf_elfheader (abfd);
1062 if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0)
1064 if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_LINUX)
1065 return FALSE;
1067 else
1069 if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX)
1070 return FALSE;
1073 flags = i_ehdrp->e_flags;
1074 switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE))
1076 case EFA_PARISC_1_0:
1077 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10);
1078 case EFA_PARISC_1_1:
1079 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11);
1080 case EFA_PARISC_2_0:
1081 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20);
1082 case EFA_PARISC_2_0 | EF_PARISC_WIDE:
1083 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25);
1085 return TRUE;
1088 /* Undo the generic ELF code's subtraction of section->vma from the
1089 value of each external symbol. */
1091 static bfd_boolean
1092 elf32_hppa_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
1093 bfd *abfd ATTRIBUTE_UNUSED;
1094 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1095 const Elf_Internal_Sym *sym ATTRIBUTE_UNUSED;
1096 const char **namep ATTRIBUTE_UNUSED;
1097 flagword *flagsp ATTRIBUTE_UNUSED;
1098 asection **secp;
1099 bfd_vma *valp;
1101 *valp += (*secp)->vma;
1102 return TRUE;
1105 /* Create the .plt and .got sections, and set up our hash table
1106 short-cuts to various dynamic sections. */
1108 static bfd_boolean
1109 elf32_hppa_create_dynamic_sections (abfd, info)
1110 bfd *abfd;
1111 struct bfd_link_info *info;
1113 struct elf32_hppa_link_hash_table *htab;
1115 /* Don't try to create the .plt and .got twice. */
1116 htab = hppa_link_hash_table (info);
1117 if (htab->splt != NULL)
1118 return TRUE;
1120 /* Call the generic code to do most of the work. */
1121 if (! _bfd_elf_create_dynamic_sections (abfd, info))
1122 return FALSE;
1124 htab->splt = bfd_get_section_by_name (abfd, ".plt");
1125 htab->srelplt = bfd_get_section_by_name (abfd, ".rela.plt");
1127 htab->sgot = bfd_get_section_by_name (abfd, ".got");
1128 htab->srelgot = bfd_make_section (abfd, ".rela.got");
1129 if (htab->srelgot == NULL
1130 || ! bfd_set_section_flags (abfd, htab->srelgot,
1131 (SEC_ALLOC
1132 | SEC_LOAD
1133 | SEC_HAS_CONTENTS
1134 | SEC_IN_MEMORY
1135 | SEC_LINKER_CREATED
1136 | SEC_READONLY))
1137 || ! bfd_set_section_alignment (abfd, htab->srelgot, 2))
1138 return FALSE;
1140 htab->sdynbss = bfd_get_section_by_name (abfd, ".dynbss");
1141 htab->srelbss = bfd_get_section_by_name (abfd, ".rela.bss");
1143 return TRUE;
1146 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1148 static void
1149 elf32_hppa_copy_indirect_symbol (bed, dir, ind)
1150 struct elf_backend_data *bed;
1151 struct elf_link_hash_entry *dir, *ind;
1153 struct elf32_hppa_link_hash_entry *edir, *eind;
1155 edir = (struct elf32_hppa_link_hash_entry *) dir;
1156 eind = (struct elf32_hppa_link_hash_entry *) ind;
1158 if (eind->dyn_relocs != NULL)
1160 if (edir->dyn_relocs != NULL)
1162 struct elf32_hppa_dyn_reloc_entry **pp;
1163 struct elf32_hppa_dyn_reloc_entry *p;
1165 if (ind->root.type == bfd_link_hash_indirect)
1166 abort ();
1168 /* Add reloc counts against the weak sym to the strong sym
1169 list. Merge any entries against the same section. */
1170 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1172 struct elf32_hppa_dyn_reloc_entry *q;
1174 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1175 if (q->sec == p->sec)
1177 #if RELATIVE_DYNRELOCS
1178 q->relative_count += p->relative_count;
1179 #endif
1180 q->count += p->count;
1181 *pp = p->next;
1182 break;
1184 if (q == NULL)
1185 pp = &p->next;
1187 *pp = edir->dyn_relocs;
1190 edir->dyn_relocs = eind->dyn_relocs;
1191 eind->dyn_relocs = NULL;
1194 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
1197 /* Look through the relocs for a section during the first phase, and
1198 calculate needed space in the global offset table, procedure linkage
1199 table, and dynamic reloc sections. At this point we haven't
1200 necessarily read all the input files. */
1202 static bfd_boolean
1203 elf32_hppa_check_relocs (abfd, info, sec, relocs)
1204 bfd *abfd;
1205 struct bfd_link_info *info;
1206 asection *sec;
1207 const Elf_Internal_Rela *relocs;
1209 Elf_Internal_Shdr *symtab_hdr;
1210 struct elf_link_hash_entry **sym_hashes;
1211 const Elf_Internal_Rela *rel;
1212 const Elf_Internal_Rela *rel_end;
1213 struct elf32_hppa_link_hash_table *htab;
1214 asection *sreloc;
1215 asection *stubreloc;
1217 if (info->relocateable)
1218 return TRUE;
1220 htab = hppa_link_hash_table (info);
1221 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1222 sym_hashes = elf_sym_hashes (abfd);
1223 sreloc = NULL;
1224 stubreloc = NULL;
1226 rel_end = relocs + sec->reloc_count;
1227 for (rel = relocs; rel < rel_end; rel++)
1229 enum {
1230 NEED_GOT = 1,
1231 NEED_PLT = 2,
1232 NEED_DYNREL = 4,
1233 PLT_PLABEL = 8
1236 unsigned int r_symndx, r_type;
1237 struct elf32_hppa_link_hash_entry *h;
1238 int need_entry;
1240 r_symndx = ELF32_R_SYM (rel->r_info);
1242 if (r_symndx < symtab_hdr->sh_info)
1243 h = NULL;
1244 else
1245 h = ((struct elf32_hppa_link_hash_entry *)
1246 sym_hashes[r_symndx - symtab_hdr->sh_info]);
1248 r_type = ELF32_R_TYPE (rel->r_info);
1250 switch (r_type)
1252 case R_PARISC_DLTIND14F:
1253 case R_PARISC_DLTIND14R:
1254 case R_PARISC_DLTIND21L:
1255 /* This symbol requires a global offset table entry. */
1256 need_entry = NEED_GOT;
1258 /* Mark this section as containing PIC code. */
1259 sec->flags |= SEC_HAS_GOT_REF;
1260 break;
1262 case R_PARISC_PLABEL14R: /* "Official" procedure labels. */
1263 case R_PARISC_PLABEL21L:
1264 case R_PARISC_PLABEL32:
1265 /* If the addend is non-zero, we break badly. */
1266 if (rel->r_addend != 0)
1267 abort ();
1269 /* If we are creating a shared library, then we need to
1270 create a PLT entry for all PLABELs, because PLABELs with
1271 local symbols may be passed via a pointer to another
1272 object. Additionally, output a dynamic relocation
1273 pointing to the PLT entry.
1274 For executables, the original 32-bit ABI allowed two
1275 different styles of PLABELs (function pointers): For
1276 global functions, the PLABEL word points into the .plt
1277 two bytes past a (function address, gp) pair, and for
1278 local functions the PLABEL points directly at the
1279 function. The magic +2 for the first type allows us to
1280 differentiate between the two. As you can imagine, this
1281 is a real pain when it comes to generating code to call
1282 functions indirectly or to compare function pointers.
1283 We avoid the mess by always pointing a PLABEL into the
1284 .plt, even for local functions. */
1285 need_entry = PLT_PLABEL | NEED_PLT | NEED_DYNREL;
1286 break;
1288 case R_PARISC_PCREL12F:
1289 htab->has_12bit_branch = 1;
1290 goto branch_common;
1292 case R_PARISC_PCREL17C:
1293 case R_PARISC_PCREL17F:
1294 htab->has_17bit_branch = 1;
1295 goto branch_common;
1297 case R_PARISC_PCREL22F:
1298 htab->has_22bit_branch = 1;
1299 branch_common:
1300 /* Function calls might need to go through the .plt, and
1301 might require long branch stubs. */
1302 if (h == NULL)
1304 /* We know local syms won't need a .plt entry, and if
1305 they need a long branch stub we can't guarantee that
1306 we can reach the stub. So just flag an error later
1307 if we're doing a shared link and find we need a long
1308 branch stub. */
1309 continue;
1311 else
1313 /* Global symbols will need a .plt entry if they remain
1314 global, and in most cases won't need a long branch
1315 stub. Unfortunately, we have to cater for the case
1316 where a symbol is forced local by versioning, or due
1317 to symbolic linking, and we lose the .plt entry. */
1318 need_entry = NEED_PLT;
1319 if (h->elf.type == STT_PARISC_MILLI)
1320 need_entry = 0;
1322 break;
1324 case R_PARISC_SEGBASE: /* Used to set segment base. */
1325 case R_PARISC_SEGREL32: /* Relative reloc, used for unwind. */
1326 case R_PARISC_PCREL14F: /* PC relative load/store. */
1327 case R_PARISC_PCREL14R:
1328 case R_PARISC_PCREL17R: /* External branches. */
1329 case R_PARISC_PCREL21L: /* As above, and for load/store too. */
1330 /* We don't need to propagate the relocation if linking a
1331 shared object since these are section relative. */
1332 continue;
1334 case R_PARISC_DPREL14F: /* Used for gp rel data load/store. */
1335 case R_PARISC_DPREL14R:
1336 case R_PARISC_DPREL21L:
1337 if (info->shared)
1339 (*_bfd_error_handler)
1340 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
1341 bfd_archive_filename (abfd),
1342 elf_hppa_howto_table[r_type].name);
1343 bfd_set_error (bfd_error_bad_value);
1344 return FALSE;
1346 /* Fall through. */
1348 case R_PARISC_DIR17F: /* Used for external branches. */
1349 case R_PARISC_DIR17R:
1350 case R_PARISC_DIR14F: /* Used for load/store from absolute locn. */
1351 case R_PARISC_DIR14R:
1352 case R_PARISC_DIR21L: /* As above, and for ext branches too. */
1353 #if 0
1354 /* Help debug shared library creation. Any of the above
1355 relocs can be used in shared libs, but they may cause
1356 pages to become unshared. */
1357 if (info->shared)
1359 (*_bfd_error_handler)
1360 (_("%s: relocation %s should not be used when making a shared object; recompile with -fPIC"),
1361 bfd_archive_filename (abfd),
1362 elf_hppa_howto_table[r_type].name);
1364 /* Fall through. */
1365 #endif
1367 case R_PARISC_DIR32: /* .word relocs. */
1368 /* We may want to output a dynamic relocation later. */
1369 need_entry = NEED_DYNREL;
1370 break;
1372 /* This relocation describes the C++ object vtable hierarchy.
1373 Reconstruct it for later use during GC. */
1374 case R_PARISC_GNU_VTINHERIT:
1375 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec,
1376 &h->elf, rel->r_offset))
1377 return FALSE;
1378 continue;
1380 /* This relocation describes which C++ vtable entries are actually
1381 used. Record for later use during GC. */
1382 case R_PARISC_GNU_VTENTRY:
1383 if (!_bfd_elf32_gc_record_vtentry (abfd, sec,
1384 &h->elf, rel->r_addend))
1385 return FALSE;
1386 continue;
1388 default:
1389 continue;
1392 /* Now carry out our orders. */
1393 if (need_entry & NEED_GOT)
1395 /* Allocate space for a GOT entry, as well as a dynamic
1396 relocation for this entry. */
1397 if (htab->sgot == NULL)
1399 if (htab->elf.dynobj == NULL)
1400 htab->elf.dynobj = abfd;
1401 if (!elf32_hppa_create_dynamic_sections (htab->elf.dynobj, info))
1402 return FALSE;
1405 if (h != NULL)
1407 h->elf.got.refcount += 1;
1409 else
1411 bfd_signed_vma *local_got_refcounts;
1413 /* This is a global offset table entry for a local symbol. */
1414 local_got_refcounts = elf_local_got_refcounts (abfd);
1415 if (local_got_refcounts == NULL)
1417 bfd_size_type size;
1419 /* Allocate space for local got offsets and local
1420 plt offsets. Done this way to save polluting
1421 elf_obj_tdata with another target specific
1422 pointer. */
1423 size = symtab_hdr->sh_info;
1424 size *= 2 * sizeof (bfd_signed_vma);
1425 local_got_refcounts = ((bfd_signed_vma *)
1426 bfd_zalloc (abfd, size));
1427 if (local_got_refcounts == NULL)
1428 return FALSE;
1429 elf_local_got_refcounts (abfd) = local_got_refcounts;
1431 local_got_refcounts[r_symndx] += 1;
1435 if (need_entry & NEED_PLT)
1437 /* If we are creating a shared library, and this is a reloc
1438 against a weak symbol or a global symbol in a dynamic
1439 object, then we will be creating an import stub and a
1440 .plt entry for the symbol. Similarly, on a normal link
1441 to symbols defined in a dynamic object we'll need the
1442 import stub and a .plt entry. We don't know yet whether
1443 the symbol is defined or not, so make an entry anyway and
1444 clean up later in adjust_dynamic_symbol. */
1445 if ((sec->flags & SEC_ALLOC) != 0)
1447 if (h != NULL)
1449 h->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1450 h->elf.plt.refcount += 1;
1452 /* If this .plt entry is for a plabel, mark it so
1453 that adjust_dynamic_symbol will keep the entry
1454 even if it appears to be local. */
1455 if (need_entry & PLT_PLABEL)
1456 h->plabel = 1;
1458 else if (need_entry & PLT_PLABEL)
1460 bfd_signed_vma *local_got_refcounts;
1461 bfd_signed_vma *local_plt_refcounts;
1463 local_got_refcounts = elf_local_got_refcounts (abfd);
1464 if (local_got_refcounts == NULL)
1466 bfd_size_type size;
1468 /* Allocate space for local got offsets and local
1469 plt offsets. */
1470 size = symtab_hdr->sh_info;
1471 size *= 2 * sizeof (bfd_signed_vma);
1472 local_got_refcounts = ((bfd_signed_vma *)
1473 bfd_zalloc (abfd, size));
1474 if (local_got_refcounts == NULL)
1475 return FALSE;
1476 elf_local_got_refcounts (abfd) = local_got_refcounts;
1478 local_plt_refcounts = (local_got_refcounts
1479 + symtab_hdr->sh_info);
1480 local_plt_refcounts[r_symndx] += 1;
1485 if (need_entry & NEED_DYNREL)
1487 /* Flag this symbol as having a non-got, non-plt reference
1488 so that we generate copy relocs if it turns out to be
1489 dynamic. */
1490 if (h != NULL && !info->shared)
1491 h->elf.elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
1493 /* If we are creating a shared library then we need to copy
1494 the reloc into the shared library. However, if we are
1495 linking with -Bsymbolic, we need only copy absolute
1496 relocs or relocs against symbols that are not defined in
1497 an object we are including in the link. PC- or DP- or
1498 DLT-relative relocs against any local sym or global sym
1499 with DEF_REGULAR set, can be discarded. At this point we
1500 have not seen all the input files, so it is possible that
1501 DEF_REGULAR is not set now but will be set later (it is
1502 never cleared). We account for that possibility below by
1503 storing information in the dyn_relocs field of the
1504 hash table entry.
1506 A similar situation to the -Bsymbolic case occurs when
1507 creating shared libraries and symbol visibility changes
1508 render the symbol local.
1510 As it turns out, all the relocs we will be creating here
1511 are absolute, so we cannot remove them on -Bsymbolic
1512 links or visibility changes anyway. A STUB_REL reloc
1513 is absolute too, as in that case it is the reloc in the
1514 stub we will be creating, rather than copying the PCREL
1515 reloc in the branch.
1517 If on the other hand, we are creating an executable, we
1518 may need to keep relocations for symbols satisfied by a
1519 dynamic library if we manage to avoid copy relocs for the
1520 symbol. */
1521 if ((info->shared
1522 && (sec->flags & SEC_ALLOC) != 0
1523 && (IS_ABSOLUTE_RELOC (r_type)
1524 || (h != NULL
1525 && (!info->symbolic
1526 || h->elf.root.type == bfd_link_hash_defweak
1527 || (h->elf.elf_link_hash_flags
1528 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1529 || (!info->shared
1530 && (sec->flags & SEC_ALLOC) != 0
1531 && h != NULL
1532 && (h->elf.root.type == bfd_link_hash_defweak
1533 || (h->elf.elf_link_hash_flags
1534 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1536 struct elf32_hppa_dyn_reloc_entry *p;
1537 struct elf32_hppa_dyn_reloc_entry **head;
1539 /* Create a reloc section in dynobj and make room for
1540 this reloc. */
1541 if (sreloc == NULL)
1543 char *name;
1544 bfd *dynobj;
1546 name = (bfd_elf_string_from_elf_section
1547 (abfd,
1548 elf_elfheader (abfd)->e_shstrndx,
1549 elf_section_data (sec)->rel_hdr.sh_name));
1550 if (name == NULL)
1552 (*_bfd_error_handler)
1553 (_("Could not find relocation section for %s"),
1554 sec->name);
1555 bfd_set_error (bfd_error_bad_value);
1556 return FALSE;
1559 if (htab->elf.dynobj == NULL)
1560 htab->elf.dynobj = abfd;
1562 dynobj = htab->elf.dynobj;
1563 sreloc = bfd_get_section_by_name (dynobj, name);
1564 if (sreloc == NULL)
1566 flagword flags;
1568 sreloc = bfd_make_section (dynobj, name);
1569 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1570 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1571 if ((sec->flags & SEC_ALLOC) != 0)
1572 flags |= SEC_ALLOC | SEC_LOAD;
1573 if (sreloc == NULL
1574 || !bfd_set_section_flags (dynobj, sreloc, flags)
1575 || !bfd_set_section_alignment (dynobj, sreloc, 2))
1576 return FALSE;
1579 elf_section_data (sec)->sreloc = sreloc;
1582 /* If this is a global symbol, we count the number of
1583 relocations we need for this symbol. */
1584 if (h != NULL)
1586 head = &h->dyn_relocs;
1588 else
1590 /* Track dynamic relocs needed for local syms too.
1591 We really need local syms available to do this
1592 easily. Oh well. */
1594 asection *s;
1595 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1596 sec, r_symndx);
1597 if (s == NULL)
1598 return FALSE;
1600 head = ((struct elf32_hppa_dyn_reloc_entry **)
1601 &elf_section_data (s)->local_dynrel);
1604 p = *head;
1605 if (p == NULL || p->sec != sec)
1607 p = ((struct elf32_hppa_dyn_reloc_entry *)
1608 bfd_alloc (htab->elf.dynobj,
1609 (bfd_size_type) sizeof *p));
1610 if (p == NULL)
1611 return FALSE;
1612 p->next = *head;
1613 *head = p;
1614 p->sec = sec;
1615 p->count = 0;
1616 #if RELATIVE_DYNRELOCS
1617 p->relative_count = 0;
1618 #endif
1621 p->count += 1;
1622 #if RELATIVE_DYNRELOCS
1623 if (!IS_ABSOLUTE_RELOC (rtype))
1624 p->relative_count += 1;
1625 #endif
1630 return TRUE;
1633 /* Return the section that should be marked against garbage collection
1634 for a given relocation. */
1636 static asection *
1637 elf32_hppa_gc_mark_hook (sec, info, rel, h, sym)
1638 asection *sec;
1639 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1640 Elf_Internal_Rela *rel;
1641 struct elf_link_hash_entry *h;
1642 Elf_Internal_Sym *sym;
1644 if (h != NULL)
1646 switch ((unsigned int) ELF32_R_TYPE (rel->r_info))
1648 case R_PARISC_GNU_VTINHERIT:
1649 case R_PARISC_GNU_VTENTRY:
1650 break;
1652 default:
1653 switch (h->root.type)
1655 case bfd_link_hash_defined:
1656 case bfd_link_hash_defweak:
1657 return h->root.u.def.section;
1659 case bfd_link_hash_common:
1660 return h->root.u.c.p->section;
1662 default:
1663 break;
1667 else
1668 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1670 return NULL;
1673 /* Update the got and plt entry reference counts for the section being
1674 removed. */
1676 static bfd_boolean
1677 elf32_hppa_gc_sweep_hook (abfd, info, sec, relocs)
1678 bfd *abfd;
1679 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1680 asection *sec;
1681 const Elf_Internal_Rela *relocs;
1683 Elf_Internal_Shdr *symtab_hdr;
1684 struct elf_link_hash_entry **sym_hashes;
1685 bfd_signed_vma *local_got_refcounts;
1686 bfd_signed_vma *local_plt_refcounts;
1687 const Elf_Internal_Rela *rel, *relend;
1688 unsigned long r_symndx;
1689 struct elf_link_hash_entry *h;
1690 struct elf32_hppa_link_hash_table *htab;
1691 bfd *dynobj;
1693 elf_section_data (sec)->local_dynrel = NULL;
1695 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1696 sym_hashes = elf_sym_hashes (abfd);
1697 local_got_refcounts = elf_local_got_refcounts (abfd);
1698 local_plt_refcounts = local_got_refcounts;
1699 if (local_plt_refcounts != NULL)
1700 local_plt_refcounts += symtab_hdr->sh_info;
1701 htab = hppa_link_hash_table (info);
1702 dynobj = htab->elf.dynobj;
1703 if (dynobj == NULL)
1704 return TRUE;
1706 relend = relocs + sec->reloc_count;
1707 for (rel = relocs; rel < relend; rel++)
1708 switch ((unsigned int) ELF32_R_TYPE (rel->r_info))
1710 case R_PARISC_DLTIND14F:
1711 case R_PARISC_DLTIND14R:
1712 case R_PARISC_DLTIND21L:
1713 r_symndx = ELF32_R_SYM (rel->r_info);
1714 if (r_symndx >= symtab_hdr->sh_info)
1716 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1717 if (h->got.refcount > 0)
1718 h->got.refcount -= 1;
1720 else if (local_got_refcounts != NULL)
1722 if (local_got_refcounts[r_symndx] > 0)
1723 local_got_refcounts[r_symndx] -= 1;
1725 break;
1727 case R_PARISC_PCREL12F:
1728 case R_PARISC_PCREL17C:
1729 case R_PARISC_PCREL17F:
1730 case R_PARISC_PCREL22F:
1731 r_symndx = ELF32_R_SYM (rel->r_info);
1732 if (r_symndx >= symtab_hdr->sh_info)
1734 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1735 if (h->plt.refcount > 0)
1736 h->plt.refcount -= 1;
1738 break;
1740 case R_PARISC_PLABEL14R:
1741 case R_PARISC_PLABEL21L:
1742 case R_PARISC_PLABEL32:
1743 r_symndx = ELF32_R_SYM (rel->r_info);
1744 if (r_symndx >= symtab_hdr->sh_info)
1746 struct elf32_hppa_link_hash_entry *eh;
1747 struct elf32_hppa_dyn_reloc_entry **pp;
1748 struct elf32_hppa_dyn_reloc_entry *p;
1750 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1752 if (h->plt.refcount > 0)
1753 h->plt.refcount -= 1;
1755 eh = (struct elf32_hppa_link_hash_entry *) h;
1757 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1758 if (p->sec == sec)
1760 #if RELATIVE_DYNRELOCS
1761 if (!IS_ABSOLUTE_RELOC (rtype))
1762 p->relative_count -= 1;
1763 #endif
1764 p->count -= 1;
1765 if (p->count == 0)
1766 *pp = p->next;
1767 break;
1770 else if (local_plt_refcounts != NULL)
1772 if (local_plt_refcounts[r_symndx] > 0)
1773 local_plt_refcounts[r_symndx] -= 1;
1775 break;
1777 case R_PARISC_DIR32:
1778 r_symndx = ELF32_R_SYM (rel->r_info);
1779 if (r_symndx >= symtab_hdr->sh_info)
1781 struct elf32_hppa_link_hash_entry *eh;
1782 struct elf32_hppa_dyn_reloc_entry **pp;
1783 struct elf32_hppa_dyn_reloc_entry *p;
1785 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1787 eh = (struct elf32_hppa_link_hash_entry *) h;
1789 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1790 if (p->sec == sec)
1792 #if RELATIVE_DYNRELOCS
1793 if (!IS_ABSOLUTE_RELOC (R_PARISC_DIR32))
1794 p->relative_count -= 1;
1795 #endif
1796 p->count -= 1;
1797 if (p->count == 0)
1798 *pp = p->next;
1799 break;
1802 break;
1804 default:
1805 break;
1808 return TRUE;
1811 /* Our own version of hide_symbol, so that we can keep plt entries for
1812 plabels. */
1814 static void
1815 elf32_hppa_hide_symbol (info, h, force_local)
1816 struct bfd_link_info *info;
1817 struct elf_link_hash_entry *h;
1818 bfd_boolean force_local;
1820 if (force_local)
1822 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
1823 if (h->dynindx != -1)
1825 h->dynindx = -1;
1826 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1827 h->dynstr_index);
1831 if (! ((struct elf32_hppa_link_hash_entry *) h)->plabel)
1833 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1834 h->plt.offset = (bfd_vma) -1;
1838 /* This is the condition under which elf32_hppa_finish_dynamic_symbol
1839 will be called from elflink.h. If elflink.h doesn't call our
1840 finish_dynamic_symbol routine, we'll need to do something about
1841 initializing any .plt and .got entries in elf32_hppa_relocate_section. */
1842 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1843 ((DYN) \
1844 && ((INFO)->shared \
1845 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1846 && ((H)->dynindx != -1 \
1847 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1849 /* Adjust a symbol defined by a dynamic object and referenced by a
1850 regular object. The current definition is in some section of the
1851 dynamic object, but we're not including those sections. We have to
1852 change the definition to something the rest of the link can
1853 understand. */
1855 static bfd_boolean
1856 elf32_hppa_adjust_dynamic_symbol (info, h)
1857 struct bfd_link_info *info;
1858 struct elf_link_hash_entry *h;
1860 struct elf32_hppa_link_hash_table *htab;
1861 struct elf32_hppa_link_hash_entry *eh;
1862 struct elf32_hppa_dyn_reloc_entry *p;
1863 asection *s;
1864 unsigned int power_of_two;
1866 /* If this is a function, put it in the procedure linkage table. We
1867 will fill in the contents of the procedure linkage table later. */
1868 if (h->type == STT_FUNC
1869 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1871 if (h->plt.refcount <= 0
1872 || ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1873 && h->root.type != bfd_link_hash_defweak
1874 && ! ((struct elf32_hppa_link_hash_entry *) h)->plabel
1875 && (!info->shared || info->symbolic)))
1877 /* The .plt entry is not needed when:
1878 a) Garbage collection has removed all references to the
1879 symbol, or
1880 b) We know for certain the symbol is defined in this
1881 object, and it's not a weak definition, nor is the symbol
1882 used by a plabel relocation. Either this object is the
1883 application or we are doing a shared symbolic link. */
1885 /* As a special sop to the hppa ABI, we keep a .plt entry
1886 for functions in sections containing PIC code. */
1887 if (!info->shared
1888 && h->plt.refcount > 0
1889 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1890 && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0)
1891 ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1;
1892 else
1894 h->plt.offset = (bfd_vma) -1;
1895 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1899 return TRUE;
1901 else
1902 h->plt.offset = (bfd_vma) -1;
1904 /* If this is a weak symbol, and there is a real definition, the
1905 processor independent code will have arranged for us to see the
1906 real definition first, and we can just use the same value. */
1907 if (h->weakdef != NULL)
1909 if (h->weakdef->root.type != bfd_link_hash_defined
1910 && h->weakdef->root.type != bfd_link_hash_defweak)
1911 abort ();
1912 h->root.u.def.section = h->weakdef->root.u.def.section;
1913 h->root.u.def.value = h->weakdef->root.u.def.value;
1914 return TRUE;
1917 /* This is a reference to a symbol defined by a dynamic object which
1918 is not a function. */
1920 /* If we are creating a shared library, we must presume that the
1921 only references to the symbol are via the global offset table.
1922 For such cases we need not do anything here; the relocations will
1923 be handled correctly by relocate_section. */
1924 if (info->shared)
1925 return TRUE;
1927 /* If there are no references to this symbol that do not use the
1928 GOT, we don't need to generate a copy reloc. */
1929 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1930 return TRUE;
1932 eh = (struct elf32_hppa_link_hash_entry *) h;
1933 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1935 s = p->sec->output_section;
1936 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1937 break;
1940 /* If we didn't find any dynamic relocs in read-only sections, then
1941 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1942 if (p == NULL)
1944 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1945 return TRUE;
1948 /* We must allocate the symbol in our .dynbss section, which will
1949 become part of the .bss section of the executable. There will be
1950 an entry for this symbol in the .dynsym section. The dynamic
1951 object will contain position independent code, so all references
1952 from the dynamic object to this symbol will go through the global
1953 offset table. The dynamic linker will use the .dynsym entry to
1954 determine the address it must put in the global offset table, so
1955 both the dynamic object and the regular object will refer to the
1956 same memory location for the variable. */
1958 htab = hppa_link_hash_table (info);
1960 /* We must generate a COPY reloc to tell the dynamic linker to
1961 copy the initial value out of the dynamic object and into the
1962 runtime process image. */
1963 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1965 htab->srelbss->_raw_size += sizeof (Elf32_External_Rela);
1966 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1969 /* We need to figure out the alignment required for this symbol. I
1970 have no idea how other ELF linkers handle this. */
1972 power_of_two = bfd_log2 (h->size);
1973 if (power_of_two > 3)
1974 power_of_two = 3;
1976 /* Apply the required alignment. */
1977 s = htab->sdynbss;
1978 s->_raw_size = BFD_ALIGN (s->_raw_size,
1979 (bfd_size_type) (1 << power_of_two));
1980 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1982 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1983 return FALSE;
1986 /* Define the symbol as being at this point in the section. */
1987 h->root.u.def.section = s;
1988 h->root.u.def.value = s->_raw_size;
1990 /* Increment the section size to make room for the symbol. */
1991 s->_raw_size += h->size;
1993 return TRUE;
1996 /* Called via elf_link_hash_traverse to create .plt entries for an
1997 application that uses statically linked PIC functions. Similar to
1998 the first part of elf32_hppa_adjust_dynamic_symbol. */
2000 static bfd_boolean
2001 mark_PIC_calls (h, inf)
2002 struct elf_link_hash_entry *h;
2003 PTR inf ATTRIBUTE_UNUSED;
2005 if (h->root.type == bfd_link_hash_warning)
2006 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2008 if (! (h->plt.refcount > 0
2009 && (h->root.type == bfd_link_hash_defined
2010 || h->root.type == bfd_link_hash_defweak)
2011 && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0))
2013 h->plt.offset = (bfd_vma) -1;
2014 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2015 return TRUE;
2018 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2019 ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1;
2021 return TRUE;
2024 /* Allocate space in the .plt for entries that won't have relocations.
2025 ie. pic_call and plabel entries. */
2027 static bfd_boolean
2028 allocate_plt_static (h, inf)
2029 struct elf_link_hash_entry *h;
2030 PTR inf;
2032 struct bfd_link_info *info;
2033 struct elf32_hppa_link_hash_table *htab;
2034 asection *s;
2036 if (h->root.type == bfd_link_hash_indirect)
2037 return TRUE;
2039 if (h->root.type == bfd_link_hash_warning)
2040 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2042 info = (struct bfd_link_info *) inf;
2043 htab = hppa_link_hash_table (info);
2044 if (((struct elf32_hppa_link_hash_entry *) h)->pic_call)
2046 /* Make an entry in the .plt section for non-pic code that is
2047 calling pic code. */
2048 ((struct elf32_hppa_link_hash_entry *) h)->plabel = 0;
2049 s = htab->splt;
2050 h->plt.offset = s->_raw_size;
2051 s->_raw_size += PLT_ENTRY_SIZE;
2053 else if (htab->elf.dynamic_sections_created
2054 && h->plt.refcount > 0)
2056 /* Make sure this symbol is output as a dynamic symbol.
2057 Undefined weak syms won't yet be marked as dynamic. */
2058 if (h->dynindx == -1
2059 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
2060 && h->type != STT_PARISC_MILLI)
2062 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2063 return FALSE;
2066 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
2068 /* Allocate these later. From this point on, h->plabel
2069 means that the plt entry is only used by a plabel.
2070 We'll be using a normal plt entry for this symbol, so
2071 clear the plabel indicator. */
2072 ((struct elf32_hppa_link_hash_entry *) h)->plabel = 0;
2074 else if (((struct elf32_hppa_link_hash_entry *) h)->plabel)
2076 /* Make an entry in the .plt section for plabel references
2077 that won't have a .plt entry for other reasons. */
2078 s = htab->splt;
2079 h->plt.offset = s->_raw_size;
2080 s->_raw_size += PLT_ENTRY_SIZE;
2082 else
2084 /* No .plt entry needed. */
2085 h->plt.offset = (bfd_vma) -1;
2086 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2089 else
2091 h->plt.offset = (bfd_vma) -1;
2092 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2095 return TRUE;
2098 /* Allocate space in .plt, .got and associated reloc sections for
2099 global syms. */
2101 static bfd_boolean
2102 allocate_dynrelocs (h, inf)
2103 struct elf_link_hash_entry *h;
2104 PTR inf;
2106 struct bfd_link_info *info;
2107 struct elf32_hppa_link_hash_table *htab;
2108 asection *s;
2109 struct elf32_hppa_link_hash_entry *eh;
2110 struct elf32_hppa_dyn_reloc_entry *p;
2112 if (h->root.type == bfd_link_hash_indirect)
2113 return TRUE;
2115 if (h->root.type == bfd_link_hash_warning)
2116 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2118 info = (struct bfd_link_info *) inf;
2119 htab = hppa_link_hash_table (info);
2120 if (htab->elf.dynamic_sections_created
2121 && h->plt.offset != (bfd_vma) -1
2122 && !((struct elf32_hppa_link_hash_entry *) h)->pic_call
2123 && !((struct elf32_hppa_link_hash_entry *) h)->plabel)
2125 /* Make an entry in the .plt section. */
2126 s = htab->splt;
2127 h->plt.offset = s->_raw_size;
2128 s->_raw_size += PLT_ENTRY_SIZE;
2130 /* We also need to make an entry in the .rela.plt section. */
2131 htab->srelplt->_raw_size += sizeof (Elf32_External_Rela);
2132 htab->need_plt_stub = 1;
2135 if (h->got.refcount > 0)
2137 /* Make sure this symbol is output as a dynamic symbol.
2138 Undefined weak syms won't yet be marked as dynamic. */
2139 if (h->dynindx == -1
2140 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
2141 && h->type != STT_PARISC_MILLI)
2143 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2144 return FALSE;
2147 s = htab->sgot;
2148 h->got.offset = s->_raw_size;
2149 s->_raw_size += GOT_ENTRY_SIZE;
2150 if (htab->elf.dynamic_sections_created
2151 && (info->shared
2152 || (h->dynindx != -1
2153 && h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0))
2155 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
2158 else
2159 h->got.offset = (bfd_vma) -1;
2161 eh = (struct elf32_hppa_link_hash_entry *) h;
2162 if (eh->dyn_relocs == NULL)
2163 return TRUE;
2165 /* If this is a -Bsymbolic shared link, then we need to discard all
2166 space allocated for dynamic pc-relative relocs against symbols
2167 defined in a regular object. For the normal shared case, discard
2168 space for relocs that have become local due to symbol visibility
2169 changes. */
2170 if (info->shared)
2172 #if RELATIVE_DYNRELOCS
2173 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
2174 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
2175 || info->symbolic))
2177 struct elf32_hppa_dyn_reloc_entry **pp;
2179 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2181 p->count -= p->relative_count;
2182 p->relative_count = 0;
2183 if (p->count == 0)
2184 *pp = p->next;
2185 else
2186 pp = &p->next;
2189 #endif
2191 else
2193 /* For the non-shared case, discard space for relocs against
2194 symbols which turn out to need copy relocs or are not
2195 dynamic. */
2196 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2197 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2198 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2199 || (htab->elf.dynamic_sections_created
2200 && (h->root.type == bfd_link_hash_undefweak
2201 || h->root.type == bfd_link_hash_undefined))))
2203 /* Make sure this symbol is output as a dynamic symbol.
2204 Undefined weak syms won't yet be marked as dynamic. */
2205 if (h->dynindx == -1
2206 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
2207 && h->type != STT_PARISC_MILLI)
2209 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2210 return FALSE;
2213 /* If that succeeded, we know we'll be keeping all the
2214 relocs. */
2215 if (h->dynindx != -1)
2216 goto keep;
2219 eh->dyn_relocs = NULL;
2220 return TRUE;
2222 keep: ;
2225 /* Finally, allocate space. */
2226 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2228 asection *sreloc = elf_section_data (p->sec)->sreloc;
2229 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
2232 return TRUE;
2235 /* This function is called via elf_link_hash_traverse to force
2236 millicode symbols local so they do not end up as globals in the
2237 dynamic symbol table. We ought to be able to do this in
2238 adjust_dynamic_symbol, but our adjust_dynamic_symbol is not called
2239 for all dynamic symbols. Arguably, this is a bug in
2240 elf_adjust_dynamic_symbol. */
2242 static bfd_boolean
2243 clobber_millicode_symbols (h, info)
2244 struct elf_link_hash_entry *h;
2245 struct bfd_link_info *info;
2247 if (h->root.type == bfd_link_hash_warning)
2248 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2250 if (h->type == STT_PARISC_MILLI
2251 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
2253 elf32_hppa_hide_symbol (info, h, TRUE);
2255 return TRUE;
2258 /* Find any dynamic relocs that apply to read-only sections. */
2260 static bfd_boolean
2261 readonly_dynrelocs (h, inf)
2262 struct elf_link_hash_entry *h;
2263 PTR inf;
2265 struct elf32_hppa_link_hash_entry *eh;
2266 struct elf32_hppa_dyn_reloc_entry *p;
2268 if (h->root.type == bfd_link_hash_warning)
2269 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2271 eh = (struct elf32_hppa_link_hash_entry *) h;
2272 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2274 asection *s = p->sec->output_section;
2276 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2278 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2280 info->flags |= DF_TEXTREL;
2282 /* Not an error, just cut short the traversal. */
2283 return FALSE;
2286 return TRUE;
2289 /* Set the sizes of the dynamic sections. */
2291 static bfd_boolean
2292 elf32_hppa_size_dynamic_sections (output_bfd, info)
2293 bfd *output_bfd ATTRIBUTE_UNUSED;
2294 struct bfd_link_info *info;
2296 struct elf32_hppa_link_hash_table *htab;
2297 bfd *dynobj;
2298 bfd *ibfd;
2299 asection *s;
2300 bfd_boolean relocs;
2302 htab = hppa_link_hash_table (info);
2303 dynobj = htab->elf.dynobj;
2304 if (dynobj == NULL)
2305 abort ();
2307 if (htab->elf.dynamic_sections_created)
2309 /* Set the contents of the .interp section to the interpreter. */
2310 if (! info->shared)
2312 s = bfd_get_section_by_name (dynobj, ".interp");
2313 if (s == NULL)
2314 abort ();
2315 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
2316 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2319 /* Force millicode symbols local. */
2320 elf_link_hash_traverse (&htab->elf,
2321 clobber_millicode_symbols,
2322 info);
2324 else
2326 /* Run through the function symbols, looking for any that are
2327 PIC, and mark them as needing .plt entries so that %r19 will
2328 be set up. */
2329 if (! info->shared)
2330 elf_link_hash_traverse (&htab->elf, mark_PIC_calls, (PTR) info);
2333 /* Set up .got and .plt offsets for local syms, and space for local
2334 dynamic relocs. */
2335 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2337 bfd_signed_vma *local_got;
2338 bfd_signed_vma *end_local_got;
2339 bfd_signed_vma *local_plt;
2340 bfd_signed_vma *end_local_plt;
2341 bfd_size_type locsymcount;
2342 Elf_Internal_Shdr *symtab_hdr;
2343 asection *srel;
2345 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2346 continue;
2348 for (s = ibfd->sections; s != NULL; s = s->next)
2350 struct elf32_hppa_dyn_reloc_entry *p;
2352 for (p = ((struct elf32_hppa_dyn_reloc_entry *)
2353 elf_section_data (s)->local_dynrel);
2354 p != NULL;
2355 p = p->next)
2357 if (!bfd_is_abs_section (p->sec)
2358 && bfd_is_abs_section (p->sec->output_section))
2360 /* Input section has been discarded, either because
2361 it is a copy of a linkonce section or due to
2362 linker script /DISCARD/, so we'll be discarding
2363 the relocs too. */
2365 else if (p->count != 0)
2367 srel = elf_section_data (p->sec)->sreloc;
2368 srel->_raw_size += p->count * sizeof (Elf32_External_Rela);
2369 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2370 info->flags |= DF_TEXTREL;
2375 local_got = elf_local_got_refcounts (ibfd);
2376 if (!local_got)
2377 continue;
2379 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2380 locsymcount = symtab_hdr->sh_info;
2381 end_local_got = local_got + locsymcount;
2382 s = htab->sgot;
2383 srel = htab->srelgot;
2384 for (; local_got < end_local_got; ++local_got)
2386 if (*local_got > 0)
2388 *local_got = s->_raw_size;
2389 s->_raw_size += GOT_ENTRY_SIZE;
2390 if (info->shared)
2391 srel->_raw_size += sizeof (Elf32_External_Rela);
2393 else
2394 *local_got = (bfd_vma) -1;
2397 local_plt = end_local_got;
2398 end_local_plt = local_plt + locsymcount;
2399 if (! htab->elf.dynamic_sections_created)
2401 /* Won't be used, but be safe. */
2402 for (; local_plt < end_local_plt; ++local_plt)
2403 *local_plt = (bfd_vma) -1;
2405 else
2407 s = htab->splt;
2408 srel = htab->srelplt;
2409 for (; local_plt < end_local_plt; ++local_plt)
2411 if (*local_plt > 0)
2413 *local_plt = s->_raw_size;
2414 s->_raw_size += PLT_ENTRY_SIZE;
2415 if (info->shared)
2416 srel->_raw_size += sizeof (Elf32_External_Rela);
2418 else
2419 *local_plt = (bfd_vma) -1;
2424 /* Do all the .plt entries without relocs first. The dynamic linker
2425 uses the last .plt reloc to find the end of the .plt (and hence
2426 the start of the .got) for lazy linking. */
2427 elf_link_hash_traverse (&htab->elf, allocate_plt_static, (PTR) info);
2429 /* Allocate global sym .plt and .got entries, and space for global
2430 sym dynamic relocs. */
2431 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2433 /* The check_relocs and adjust_dynamic_symbol entry points have
2434 determined the sizes of the various dynamic sections. Allocate
2435 memory for them. */
2436 relocs = FALSE;
2437 for (s = dynobj->sections; s != NULL; s = s->next)
2439 if ((s->flags & SEC_LINKER_CREATED) == 0)
2440 continue;
2442 if (s == htab->splt)
2444 if (htab->need_plt_stub)
2446 /* Make space for the plt stub at the end of the .plt
2447 section. We want this stub right at the end, up
2448 against the .got section. */
2449 int gotalign = bfd_section_alignment (dynobj, htab->sgot);
2450 int pltalign = bfd_section_alignment (dynobj, s);
2451 bfd_size_type mask;
2453 if (gotalign > pltalign)
2454 bfd_set_section_alignment (dynobj, s, gotalign);
2455 mask = ((bfd_size_type) 1 << gotalign) - 1;
2456 s->_raw_size = (s->_raw_size + sizeof (plt_stub) + mask) & ~mask;
2459 else if (s == htab->sgot)
2461 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2463 if (s->_raw_size != 0)
2465 /* Remember whether there are any reloc sections other
2466 than .rela.plt. */
2467 if (s != htab->srelplt)
2468 relocs = TRUE;
2470 /* We use the reloc_count field as a counter if we need
2471 to copy relocs into the output file. */
2472 s->reloc_count = 0;
2475 else
2477 /* It's not one of our sections, so don't allocate space. */
2478 continue;
2481 if (s->_raw_size == 0)
2483 /* If we don't need this section, strip it from the
2484 output file. This is mostly to handle .rela.bss and
2485 .rela.plt. We must create both sections in
2486 create_dynamic_sections, because they must be created
2487 before the linker maps input sections to output
2488 sections. The linker does that before
2489 adjust_dynamic_symbol is called, and it is that
2490 function which decides whether anything needs to go
2491 into these sections. */
2492 _bfd_strip_section_from_output (info, s);
2493 continue;
2496 /* Allocate memory for the section contents. Zero it, because
2497 we may not fill in all the reloc sections. */
2498 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2499 if (s->contents == NULL && s->_raw_size != 0)
2500 return FALSE;
2503 if (htab->elf.dynamic_sections_created)
2505 /* Like IA-64 and HPPA64, always create a DT_PLTGOT. It
2506 actually has nothing to do with the PLT, it is how we
2507 communicate the LTP value of a load module to the dynamic
2508 linker. */
2509 #define add_dynamic_entry(TAG, VAL) \
2510 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
2512 if (!add_dynamic_entry (DT_PLTGOT, 0))
2513 return FALSE;
2515 /* Add some entries to the .dynamic section. We fill in the
2516 values later, in elf32_hppa_finish_dynamic_sections, but we
2517 must add the entries now so that we get the correct size for
2518 the .dynamic section. The DT_DEBUG entry is filled in by the
2519 dynamic linker and used by the debugger. */
2520 if (!info->shared)
2522 if (!add_dynamic_entry (DT_DEBUG, 0))
2523 return FALSE;
2526 if (htab->srelplt->_raw_size != 0)
2528 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2529 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2530 || !add_dynamic_entry (DT_JMPREL, 0))
2531 return FALSE;
2534 if (relocs)
2536 if (!add_dynamic_entry (DT_RELA, 0)
2537 || !add_dynamic_entry (DT_RELASZ, 0)
2538 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2539 return FALSE;
2541 /* If any dynamic relocs apply to a read-only section,
2542 then we need a DT_TEXTREL entry. */
2543 if ((info->flags & DF_TEXTREL) == 0)
2544 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2545 (PTR) info);
2547 if ((info->flags & DF_TEXTREL) != 0)
2549 if (!add_dynamic_entry (DT_TEXTREL, 0))
2550 return FALSE;
2554 #undef add_dynamic_entry
2556 return TRUE;
2559 /* External entry points for sizing and building linker stubs. */
2561 /* Set up various things so that we can make a list of input sections
2562 for each output section included in the link. Returns -1 on error,
2563 0 when no stubs will be needed, and 1 on success. */
2566 elf32_hppa_setup_section_lists (output_bfd, info)
2567 bfd *output_bfd;
2568 struct bfd_link_info *info;
2570 bfd *input_bfd;
2571 unsigned int bfd_count;
2572 int top_id, top_index;
2573 asection *section;
2574 asection **input_list, **list;
2575 bfd_size_type amt;
2576 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
2578 if (htab->elf.root.creator->flavour != bfd_target_elf_flavour)
2579 return 0;
2581 /* Count the number of input BFDs and find the top input section id. */
2582 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2583 input_bfd != NULL;
2584 input_bfd = input_bfd->link_next)
2586 bfd_count += 1;
2587 for (section = input_bfd->sections;
2588 section != NULL;
2589 section = section->next)
2591 if (top_id < section->id)
2592 top_id = section->id;
2595 htab->bfd_count = bfd_count;
2597 amt = sizeof (struct map_stub) * (top_id + 1);
2598 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
2599 if (htab->stub_group == NULL)
2600 return -1;
2602 /* We can't use output_bfd->section_count here to find the top output
2603 section index as some sections may have been removed, and
2604 _bfd_strip_section_from_output doesn't renumber the indices. */
2605 for (section = output_bfd->sections, top_index = 0;
2606 section != NULL;
2607 section = section->next)
2609 if (top_index < section->index)
2610 top_index = section->index;
2613 htab->top_index = top_index;
2614 amt = sizeof (asection *) * (top_index + 1);
2615 input_list = (asection **) bfd_malloc (amt);
2616 htab->input_list = input_list;
2617 if (input_list == NULL)
2618 return -1;
2620 /* For sections we aren't interested in, mark their entries with a
2621 value we can check later. */
2622 list = input_list + top_index;
2624 *list = bfd_abs_section_ptr;
2625 while (list-- != input_list);
2627 for (section = output_bfd->sections;
2628 section != NULL;
2629 section = section->next)
2631 if ((section->flags & SEC_CODE) != 0)
2632 input_list[section->index] = NULL;
2635 return 1;
2638 /* The linker repeatedly calls this function for each input section,
2639 in the order that input sections are linked into output sections.
2640 Build lists of input sections to determine groupings between which
2641 we may insert linker stubs. */
2643 void
2644 elf32_hppa_next_input_section (info, isec)
2645 struct bfd_link_info *info;
2646 asection *isec;
2648 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
2650 if (isec->output_section->index <= htab->top_index)
2652 asection **list = htab->input_list + isec->output_section->index;
2653 if (*list != bfd_abs_section_ptr)
2655 /* Steal the link_sec pointer for our list. */
2656 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
2657 /* This happens to make the list in reverse order,
2658 which is what we want. */
2659 PREV_SEC (isec) = *list;
2660 *list = isec;
2665 /* See whether we can group stub sections together. Grouping stub
2666 sections may result in fewer stubs. More importantly, we need to
2667 put all .init* and .fini* stubs at the beginning of the .init or
2668 .fini output sections respectively, because glibc splits the
2669 _init and _fini functions into multiple parts. Putting a stub in
2670 the middle of a function is not a good idea. */
2672 static void
2673 group_sections (htab, stub_group_size, stubs_always_before_branch)
2674 struct elf32_hppa_link_hash_table *htab;
2675 bfd_size_type stub_group_size;
2676 bfd_boolean stubs_always_before_branch;
2678 asection **list = htab->input_list + htab->top_index;
2681 asection *tail = *list;
2682 if (tail == bfd_abs_section_ptr)
2683 continue;
2684 while (tail != NULL)
2686 asection *curr;
2687 asection *prev;
2688 bfd_size_type total;
2689 bfd_boolean big_sec;
2691 curr = tail;
2692 if (tail->_cooked_size)
2693 total = tail->_cooked_size;
2694 else
2695 total = tail->_raw_size;
2696 big_sec = total >= stub_group_size;
2698 while ((prev = PREV_SEC (curr)) != NULL
2699 && ((total += curr->output_offset - prev->output_offset)
2700 < stub_group_size))
2701 curr = prev;
2703 /* OK, the size from the start of CURR to the end is less
2704 than 240000 bytes and thus can be handled by one stub
2705 section. (or the tail section is itself larger than
2706 240000 bytes, in which case we may be toast.)
2707 We should really be keeping track of the total size of
2708 stubs added here, as stubs contribute to the final output
2709 section size. That's a little tricky, and this way will
2710 only break if stubs added total more than 22144 bytes, or
2711 2768 long branch stubs. It seems unlikely for more than
2712 2768 different functions to be called, especially from
2713 code only 240000 bytes long. This limit used to be
2714 250000, but c++ code tends to generate lots of little
2715 functions, and sometimes violated the assumption. */
2718 prev = PREV_SEC (tail);
2719 /* Set up this stub group. */
2720 htab->stub_group[tail->id].link_sec = curr;
2722 while (tail != curr && (tail = prev) != NULL);
2724 /* But wait, there's more! Input sections up to 240000
2725 bytes before the stub section can be handled by it too.
2726 Don't do this if we have a really large section after the
2727 stubs, as adding more stubs increases the chance that
2728 branches may not reach into the stub section. */
2729 if (!stubs_always_before_branch && !big_sec)
2731 total = 0;
2732 while (prev != NULL
2733 && ((total += tail->output_offset - prev->output_offset)
2734 < stub_group_size))
2736 tail = prev;
2737 prev = PREV_SEC (tail);
2738 htab->stub_group[tail->id].link_sec = curr;
2741 tail = prev;
2744 while (list-- != htab->input_list);
2745 free (htab->input_list);
2746 #undef PREV_SEC
2749 /* Read in all local syms for all input bfds, and create hash entries
2750 for export stubs if we are building a multi-subspace shared lib.
2751 Returns -1 on error, 1 if export stubs created, 0 otherwise. */
2753 static int
2754 get_local_syms (output_bfd, input_bfd, info)
2755 bfd *output_bfd;
2756 bfd *input_bfd;
2757 struct bfd_link_info *info;
2759 unsigned int bfd_indx;
2760 Elf_Internal_Sym *local_syms, **all_local_syms;
2761 int stub_changed = 0;
2762 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
2764 /* We want to read in symbol extension records only once. To do this
2765 we need to read in the local symbols in parallel and save them for
2766 later use; so hold pointers to the local symbols in an array. */
2767 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
2768 all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt);
2769 htab->all_local_syms = all_local_syms;
2770 if (all_local_syms == NULL)
2771 return -1;
2773 /* Walk over all the input BFDs, swapping in local symbols.
2774 If we are creating a shared library, create hash entries for the
2775 export stubs. */
2776 for (bfd_indx = 0;
2777 input_bfd != NULL;
2778 input_bfd = input_bfd->link_next, bfd_indx++)
2780 Elf_Internal_Shdr *symtab_hdr;
2782 /* We'll need the symbol table in a second. */
2783 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2784 if (symtab_hdr->sh_info == 0)
2785 continue;
2787 /* We need an array of the local symbols attached to the input bfd. */
2788 local_syms = (Elf_Internal_Sym *) symtab_hdr->contents;
2789 if (local_syms == NULL)
2791 local_syms = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2792 symtab_hdr->sh_info, 0,
2793 NULL, NULL, NULL);
2794 /* Cache them for elf_link_input_bfd. */
2795 symtab_hdr->contents = (unsigned char *) local_syms;
2797 if (local_syms == NULL)
2798 return -1;
2800 all_local_syms[bfd_indx] = local_syms;
2802 if (info->shared && htab->multi_subspace)
2804 struct elf_link_hash_entry **sym_hashes;
2805 struct elf_link_hash_entry **end_hashes;
2806 unsigned int symcount;
2808 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2809 - symtab_hdr->sh_info);
2810 sym_hashes = elf_sym_hashes (input_bfd);
2811 end_hashes = sym_hashes + symcount;
2813 /* Look through the global syms for functions; We need to
2814 build export stubs for all globally visible functions. */
2815 for (; sym_hashes < end_hashes; sym_hashes++)
2817 struct elf32_hppa_link_hash_entry *hash;
2819 hash = (struct elf32_hppa_link_hash_entry *) *sym_hashes;
2821 while (hash->elf.root.type == bfd_link_hash_indirect
2822 || hash->elf.root.type == bfd_link_hash_warning)
2823 hash = ((struct elf32_hppa_link_hash_entry *)
2824 hash->elf.root.u.i.link);
2826 /* At this point in the link, undefined syms have been
2827 resolved, so we need to check that the symbol was
2828 defined in this BFD. */
2829 if ((hash->elf.root.type == bfd_link_hash_defined
2830 || hash->elf.root.type == bfd_link_hash_defweak)
2831 && hash->elf.type == STT_FUNC
2832 && hash->elf.root.u.def.section->output_section != NULL
2833 && (hash->elf.root.u.def.section->output_section->owner
2834 == output_bfd)
2835 && hash->elf.root.u.def.section->owner == input_bfd
2836 && (hash->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
2837 && !(hash->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)
2838 && ELF_ST_VISIBILITY (hash->elf.other) == STV_DEFAULT)
2840 asection *sec;
2841 const char *stub_name;
2842 struct elf32_hppa_stub_hash_entry *stub_entry;
2844 sec = hash->elf.root.u.def.section;
2845 stub_name = hash->elf.root.root.string;
2846 stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table,
2847 stub_name,
2848 FALSE, FALSE);
2849 if (stub_entry == NULL)
2851 stub_entry = hppa_add_stub (stub_name, sec, htab);
2852 if (!stub_entry)
2853 return -1;
2855 stub_entry->target_value = hash->elf.root.u.def.value;
2856 stub_entry->target_section = hash->elf.root.u.def.section;
2857 stub_entry->stub_type = hppa_stub_export;
2858 stub_entry->h = hash;
2859 stub_changed = 1;
2861 else
2863 (*_bfd_error_handler) (_("%s: duplicate export stub %s"),
2864 bfd_archive_filename (input_bfd),
2865 stub_name);
2872 return stub_changed;
2875 /* Determine and set the size of the stub section for a final link.
2877 The basic idea here is to examine all the relocations looking for
2878 PC-relative calls to a target that is unreachable with a "bl"
2879 instruction. */
2881 bfd_boolean
2882 elf32_hppa_size_stubs (output_bfd, stub_bfd, info, multi_subspace, group_size,
2883 add_stub_section, layout_sections_again)
2884 bfd *output_bfd;
2885 bfd *stub_bfd;
2886 struct bfd_link_info *info;
2887 bfd_boolean multi_subspace;
2888 bfd_signed_vma group_size;
2889 asection * (*add_stub_section) PARAMS ((const char *, asection *));
2890 void (*layout_sections_again) PARAMS ((void));
2892 bfd_size_type stub_group_size;
2893 bfd_boolean stubs_always_before_branch;
2894 bfd_boolean stub_changed;
2895 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
2897 /* Stash our params away. */
2898 htab->stub_bfd = stub_bfd;
2899 htab->multi_subspace = multi_subspace;
2900 htab->add_stub_section = add_stub_section;
2901 htab->layout_sections_again = layout_sections_again;
2902 stubs_always_before_branch = group_size < 0;
2903 if (group_size < 0)
2904 stub_group_size = -group_size;
2905 else
2906 stub_group_size = group_size;
2907 if (stub_group_size == 1)
2909 /* Default values. */
2910 if (stubs_always_before_branch)
2912 stub_group_size = 7680000;
2913 if (htab->has_17bit_branch || htab->multi_subspace)
2914 stub_group_size = 240000;
2915 if (htab->has_12bit_branch)
2916 stub_group_size = 7500;
2918 else
2920 stub_group_size = 6971392;
2921 if (htab->has_17bit_branch || htab->multi_subspace)
2922 stub_group_size = 217856;
2923 if (htab->has_12bit_branch)
2924 stub_group_size = 6808;
2928 group_sections (htab, stub_group_size, stubs_always_before_branch);
2930 switch (get_local_syms (output_bfd, info->input_bfds, info))
2932 default:
2933 if (htab->all_local_syms)
2934 goto error_ret_free_local;
2935 return FALSE;
2937 case 0:
2938 stub_changed = FALSE;
2939 break;
2941 case 1:
2942 stub_changed = TRUE;
2943 break;
2946 while (1)
2948 bfd *input_bfd;
2949 unsigned int bfd_indx;
2950 asection *stub_sec;
2952 for (input_bfd = info->input_bfds, bfd_indx = 0;
2953 input_bfd != NULL;
2954 input_bfd = input_bfd->link_next, bfd_indx++)
2956 Elf_Internal_Shdr *symtab_hdr;
2957 asection *section;
2958 Elf_Internal_Sym *local_syms;
2960 /* We'll need the symbol table in a second. */
2961 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2962 if (symtab_hdr->sh_info == 0)
2963 continue;
2965 local_syms = htab->all_local_syms[bfd_indx];
2967 /* Walk over each section attached to the input bfd. */
2968 for (section = input_bfd->sections;
2969 section != NULL;
2970 section = section->next)
2972 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
2974 /* If there aren't any relocs, then there's nothing more
2975 to do. */
2976 if ((section->flags & SEC_RELOC) == 0
2977 || section->reloc_count == 0)
2978 continue;
2980 /* If this section is a link-once section that will be
2981 discarded, then don't create any stubs. */
2982 if (section->output_section == NULL
2983 || section->output_section->owner != output_bfd)
2984 continue;
2986 /* Get the relocs. */
2987 internal_relocs
2988 = _bfd_elf32_link_read_relocs (input_bfd, section, NULL,
2989 (Elf_Internal_Rela *) NULL,
2990 info->keep_memory);
2991 if (internal_relocs == NULL)
2992 goto error_ret_free_local;
2994 /* Now examine each relocation. */
2995 irela = internal_relocs;
2996 irelaend = irela + section->reloc_count;
2997 for (; irela < irelaend; irela++)
2999 unsigned int r_type, r_indx;
3000 enum elf32_hppa_stub_type stub_type;
3001 struct elf32_hppa_stub_hash_entry *stub_entry;
3002 asection *sym_sec;
3003 bfd_vma sym_value;
3004 bfd_vma destination;
3005 struct elf32_hppa_link_hash_entry *hash;
3006 char *stub_name;
3007 const asection *id_sec;
3009 r_type = ELF32_R_TYPE (irela->r_info);
3010 r_indx = ELF32_R_SYM (irela->r_info);
3012 if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
3014 bfd_set_error (bfd_error_bad_value);
3015 error_ret_free_internal:
3016 if (elf_section_data (section)->relocs == NULL)
3017 free (internal_relocs);
3018 goto error_ret_free_local;
3021 /* Only look for stubs on call instructions. */
3022 if (r_type != (unsigned int) R_PARISC_PCREL12F
3023 && r_type != (unsigned int) R_PARISC_PCREL17F
3024 && r_type != (unsigned int) R_PARISC_PCREL22F)
3025 continue;
3027 /* Now determine the call target, its name, value,
3028 section. */
3029 sym_sec = NULL;
3030 sym_value = 0;
3031 destination = 0;
3032 hash = NULL;
3033 if (r_indx < symtab_hdr->sh_info)
3035 /* It's a local symbol. */
3036 Elf_Internal_Sym *sym;
3037 Elf_Internal_Shdr *hdr;
3039 sym = local_syms + r_indx;
3040 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
3041 sym_sec = hdr->bfd_section;
3042 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3043 sym_value = sym->st_value;
3044 destination = (sym_value + irela->r_addend
3045 + sym_sec->output_offset
3046 + sym_sec->output_section->vma);
3048 else
3050 /* It's an external symbol. */
3051 int e_indx;
3053 e_indx = r_indx - symtab_hdr->sh_info;
3054 hash = ((struct elf32_hppa_link_hash_entry *)
3055 elf_sym_hashes (input_bfd)[e_indx]);
3057 while (hash->elf.root.type == bfd_link_hash_indirect
3058 || hash->elf.root.type == bfd_link_hash_warning)
3059 hash = ((struct elf32_hppa_link_hash_entry *)
3060 hash->elf.root.u.i.link);
3062 if (hash->elf.root.type == bfd_link_hash_defined
3063 || hash->elf.root.type == bfd_link_hash_defweak)
3065 sym_sec = hash->elf.root.u.def.section;
3066 sym_value = hash->elf.root.u.def.value;
3067 if (sym_sec->output_section != NULL)
3068 destination = (sym_value + irela->r_addend
3069 + sym_sec->output_offset
3070 + sym_sec->output_section->vma);
3072 else if (hash->elf.root.type == bfd_link_hash_undefweak)
3074 if (! info->shared)
3075 continue;
3077 else if (hash->elf.root.type == bfd_link_hash_undefined)
3079 if (! (info->shared
3080 && !info->no_undefined
3081 && (ELF_ST_VISIBILITY (hash->elf.other)
3082 == STV_DEFAULT)
3083 && hash->elf.type != STT_PARISC_MILLI))
3084 continue;
3086 else
3088 bfd_set_error (bfd_error_bad_value);
3089 goto error_ret_free_internal;
3093 /* Determine what (if any) linker stub is needed. */
3094 stub_type = hppa_type_of_stub (section, irela, hash,
3095 destination);
3096 if (stub_type == hppa_stub_none)
3097 continue;
3099 /* Support for grouping stub sections. */
3100 id_sec = htab->stub_group[section->id].link_sec;
3102 /* Get the name of this stub. */
3103 stub_name = hppa_stub_name (id_sec, sym_sec, hash, irela);
3104 if (!stub_name)
3105 goto error_ret_free_internal;
3107 stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table,
3108 stub_name,
3109 FALSE, FALSE);
3110 if (stub_entry != NULL)
3112 /* The proper stub has already been created. */
3113 free (stub_name);
3114 continue;
3117 stub_entry = hppa_add_stub (stub_name, section, htab);
3118 if (stub_entry == NULL)
3120 free (stub_name);
3121 goto error_ret_free_internal;
3124 stub_entry->target_value = sym_value;
3125 stub_entry->target_section = sym_sec;
3126 stub_entry->stub_type = stub_type;
3127 if (info->shared)
3129 if (stub_type == hppa_stub_import)
3130 stub_entry->stub_type = hppa_stub_import_shared;
3131 else if (stub_type == hppa_stub_long_branch)
3132 stub_entry->stub_type = hppa_stub_long_branch_shared;
3134 stub_entry->h = hash;
3135 stub_changed = TRUE;
3138 /* We're done with the internal relocs, free them. */
3139 if (elf_section_data (section)->relocs == NULL)
3140 free (internal_relocs);
3144 if (!stub_changed)
3145 break;
3147 /* OK, we've added some stubs. Find out the new size of the
3148 stub sections. */
3149 for (stub_sec = htab->stub_bfd->sections;
3150 stub_sec != NULL;
3151 stub_sec = stub_sec->next)
3153 stub_sec->_raw_size = 0;
3154 stub_sec->_cooked_size = 0;
3157 bfd_hash_traverse (&htab->stub_hash_table, hppa_size_one_stub, htab);
3159 /* Ask the linker to do its stuff. */
3160 (*htab->layout_sections_again) ();
3161 stub_changed = FALSE;
3164 free (htab->all_local_syms);
3165 return TRUE;
3167 error_ret_free_local:
3168 free (htab->all_local_syms);
3169 return FALSE;
3172 /* For a final link, this function is called after we have sized the
3173 stubs to provide a value for __gp. */
3175 bfd_boolean
3176 elf32_hppa_set_gp (abfd, info)
3177 bfd *abfd;
3178 struct bfd_link_info *info;
3180 struct bfd_link_hash_entry *h;
3181 asection *sec = NULL;
3182 bfd_vma gp_val = 0;
3183 struct elf32_hppa_link_hash_table *htab;
3185 htab = hppa_link_hash_table (info);
3186 h = bfd_link_hash_lookup (&htab->elf.root, "$global$", FALSE, FALSE, FALSE);
3188 if (h != NULL
3189 && (h->type == bfd_link_hash_defined
3190 || h->type == bfd_link_hash_defweak))
3192 gp_val = h->u.def.value;
3193 sec = h->u.def.section;
3195 else
3197 asection *splt;
3198 asection *sgot;
3200 if (htab->elf.root.creator->flavour == bfd_target_elf_flavour)
3202 splt = htab->splt;
3203 sgot = htab->sgot;
3205 else
3207 /* If we're not elf, look up the output sections in the
3208 hope we may actually find them. */
3209 splt = bfd_get_section_by_name (abfd, ".plt");
3210 sgot = bfd_get_section_by_name (abfd, ".got");
3213 /* Choose to point our LTP at, in this order, one of .plt, .got,
3214 or .data, if these sections exist. In the case of choosing
3215 .plt try to make the LTP ideal for addressing anywhere in the
3216 .plt or .got with a 14 bit signed offset. Typically, the end
3217 of the .plt is the start of the .got, so choose .plt + 0x2000
3218 if either the .plt or .got is larger than 0x2000. If both
3219 the .plt and .got are smaller than 0x2000, choose the end of
3220 the .plt section. */
3221 sec = splt;
3222 if (sec != NULL)
3224 gp_val = sec->_raw_size;
3225 if (gp_val > 0x2000 || (sgot && sgot->_raw_size > 0x2000))
3227 gp_val = 0x2000;
3230 else
3232 sec = sgot;
3233 if (sec != NULL)
3235 /* We know we don't have a .plt. If .got is large,
3236 offset our LTP. */
3237 if (sec->_raw_size > 0x2000)
3238 gp_val = 0x2000;
3240 else
3242 /* No .plt or .got. Who cares what the LTP is? */
3243 sec = bfd_get_section_by_name (abfd, ".data");
3247 if (h != NULL)
3249 h->type = bfd_link_hash_defined;
3250 h->u.def.value = gp_val;
3251 if (sec != NULL)
3252 h->u.def.section = sec;
3253 else
3254 h->u.def.section = bfd_abs_section_ptr;
3258 if (sec != NULL && sec->output_section != NULL)
3259 gp_val += sec->output_section->vma + sec->output_offset;
3261 elf_gp (abfd) = gp_val;
3262 return TRUE;
3265 /* Build all the stubs associated with the current output file. The
3266 stubs are kept in a hash table attached to the main linker hash
3267 table. We also set up the .plt entries for statically linked PIC
3268 functions here. This function is called via hppaelf_finish in the
3269 linker. */
3271 bfd_boolean
3272 elf32_hppa_build_stubs (info)
3273 struct bfd_link_info *info;
3275 asection *stub_sec;
3276 struct bfd_hash_table *table;
3277 struct elf32_hppa_link_hash_table *htab;
3279 htab = hppa_link_hash_table (info);
3281 for (stub_sec = htab->stub_bfd->sections;
3282 stub_sec != NULL;
3283 stub_sec = stub_sec->next)
3285 bfd_size_type size;
3287 /* Allocate memory to hold the linker stubs. */
3288 size = stub_sec->_raw_size;
3289 stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size);
3290 if (stub_sec->contents == NULL && size != 0)
3291 return FALSE;
3292 stub_sec->_raw_size = 0;
3295 /* Build the stubs as directed by the stub hash table. */
3296 table = &htab->stub_hash_table;
3297 bfd_hash_traverse (table, hppa_build_one_stub, info);
3299 return TRUE;
3302 /* Perform a final link. */
3304 static bfd_boolean
3305 elf32_hppa_final_link (abfd, info)
3306 bfd *abfd;
3307 struct bfd_link_info *info;
3309 /* Invoke the regular ELF linker to do all the work. */
3310 if (!bfd_elf32_bfd_final_link (abfd, info))
3311 return FALSE;
3313 /* If we're producing a final executable, sort the contents of the
3314 unwind section. */
3315 return elf_hppa_sort_unwind (abfd);
3318 /* Record the lowest address for the data and text segments. */
3320 static void
3321 hppa_record_segment_addr (abfd, section, data)
3322 bfd *abfd ATTRIBUTE_UNUSED;
3323 asection *section;
3324 PTR data;
3326 struct elf32_hppa_link_hash_table *htab;
3328 htab = (struct elf32_hppa_link_hash_table *) data;
3330 if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3332 bfd_vma value = section->vma - section->filepos;
3334 if ((section->flags & SEC_READONLY) != 0)
3336 if (value < htab->text_segment_base)
3337 htab->text_segment_base = value;
3339 else
3341 if (value < htab->data_segment_base)
3342 htab->data_segment_base = value;
3347 /* Perform a relocation as part of a final link. */
3349 static bfd_reloc_status_type
3350 final_link_relocate (input_section, contents, rel, value, htab, sym_sec, h)
3351 asection *input_section;
3352 bfd_byte *contents;
3353 const Elf_Internal_Rela *rel;
3354 bfd_vma value;
3355 struct elf32_hppa_link_hash_table *htab;
3356 asection *sym_sec;
3357 struct elf32_hppa_link_hash_entry *h;
3359 int insn;
3360 unsigned int r_type = ELF32_R_TYPE (rel->r_info);
3361 reloc_howto_type *howto = elf_hppa_howto_table + r_type;
3362 int r_format = howto->bitsize;
3363 enum hppa_reloc_field_selector_type_alt r_field;
3364 bfd *input_bfd = input_section->owner;
3365 bfd_vma offset = rel->r_offset;
3366 bfd_vma max_branch_offset = 0;
3367 bfd_byte *hit_data = contents + offset;
3368 bfd_signed_vma addend = rel->r_addend;
3369 bfd_vma location;
3370 struct elf32_hppa_stub_hash_entry *stub_entry = NULL;
3371 int val;
3373 if (r_type == R_PARISC_NONE)
3374 return bfd_reloc_ok;
3376 insn = bfd_get_32 (input_bfd, hit_data);
3378 /* Find out where we are and where we're going. */
3379 location = (offset +
3380 input_section->output_offset +
3381 input_section->output_section->vma);
3383 switch (r_type)
3385 case R_PARISC_PCREL12F:
3386 case R_PARISC_PCREL17F:
3387 case R_PARISC_PCREL22F:
3388 /* If this call should go via the plt, find the import stub in
3389 the stub hash. */
3390 if (sym_sec == NULL
3391 || sym_sec->output_section == NULL
3392 || (h != NULL
3393 && h->elf.plt.offset != (bfd_vma) -1
3394 && (h->elf.dynindx != -1 || h->pic_call)
3395 && !h->plabel))
3397 stub_entry = hppa_get_stub_entry (input_section, sym_sec,
3398 h, rel, htab);
3399 if (stub_entry != NULL)
3401 value = (stub_entry->stub_offset
3402 + stub_entry->stub_sec->output_offset
3403 + stub_entry->stub_sec->output_section->vma);
3404 addend = 0;
3406 else if (sym_sec == NULL && h != NULL
3407 && h->elf.root.type == bfd_link_hash_undefweak)
3409 /* It's OK if undefined weak. Calls to undefined weak
3410 symbols behave as if the "called" function
3411 immediately returns. We can thus call to a weak
3412 function without first checking whether the function
3413 is defined. */
3414 value = location;
3415 addend = 8;
3417 else
3418 return bfd_reloc_undefined;
3420 /* Fall thru. */
3422 case R_PARISC_PCREL21L:
3423 case R_PARISC_PCREL17C:
3424 case R_PARISC_PCREL17R:
3425 case R_PARISC_PCREL14R:
3426 case R_PARISC_PCREL14F:
3427 /* Make it a pc relative offset. */
3428 value -= location;
3429 addend -= 8;
3430 break;
3432 case R_PARISC_DPREL21L:
3433 case R_PARISC_DPREL14R:
3434 case R_PARISC_DPREL14F:
3435 /* For all the DP relative relocations, we need to examine the symbol's
3436 section. If it has no section or if it's a code section, then
3437 "data pointer relative" makes no sense. In that case we don't
3438 adjust the "value", and for 21 bit addil instructions, we change the
3439 source addend register from %dp to %r0. This situation commonly
3440 arises for undefined weak symbols and when a variable's "constness"
3441 is declared differently from the way the variable is defined. For
3442 instance: "extern int foo" with foo defined as "const int foo". */
3443 if (sym_sec == NULL || (sym_sec->flags & SEC_CODE) != 0)
3445 if ((insn & ((0x3f << 26) | (0x1f << 21)))
3446 == (((int) OP_ADDIL << 26) | (27 << 21)))
3448 insn &= ~ (0x1f << 21);
3449 #if 0 /* debug them. */
3450 (*_bfd_error_handler)
3451 (_("%s(%s+0x%lx): fixing %s"),
3452 bfd_archive_filename (input_bfd),
3453 input_section->name,
3454 (long) rel->r_offset,
3455 howto->name);
3456 #endif
3458 /* Now try to make things easy for the dynamic linker. */
3460 break;
3462 /* Fall thru. */
3464 case R_PARISC_DLTIND21L:
3465 case R_PARISC_DLTIND14R:
3466 case R_PARISC_DLTIND14F:
3467 value -= elf_gp (input_section->output_section->owner);
3468 break;
3470 case R_PARISC_SEGREL32:
3471 if ((sym_sec->flags & SEC_CODE) != 0)
3472 value -= htab->text_segment_base;
3473 else
3474 value -= htab->data_segment_base;
3475 break;
3477 default:
3478 break;
3481 switch (r_type)
3483 case R_PARISC_DIR32:
3484 case R_PARISC_DIR14F:
3485 case R_PARISC_DIR17F:
3486 case R_PARISC_PCREL17C:
3487 case R_PARISC_PCREL14F:
3488 case R_PARISC_DPREL14F:
3489 case R_PARISC_PLABEL32:
3490 case R_PARISC_DLTIND14F:
3491 case R_PARISC_SEGBASE:
3492 case R_PARISC_SEGREL32:
3493 r_field = e_fsel;
3494 break;
3496 case R_PARISC_DLTIND21L:
3497 case R_PARISC_PCREL21L:
3498 case R_PARISC_PLABEL21L:
3499 r_field = e_lsel;
3500 break;
3502 case R_PARISC_DIR21L:
3503 case R_PARISC_DPREL21L:
3504 r_field = e_lrsel;
3505 break;
3507 case R_PARISC_PCREL17R:
3508 case R_PARISC_PCREL14R:
3509 case R_PARISC_PLABEL14R:
3510 case R_PARISC_DLTIND14R:
3511 r_field = e_rsel;
3512 break;
3514 case R_PARISC_DIR17R:
3515 case R_PARISC_DIR14R:
3516 case R_PARISC_DPREL14R:
3517 r_field = e_rrsel;
3518 break;
3520 case R_PARISC_PCREL12F:
3521 case R_PARISC_PCREL17F:
3522 case R_PARISC_PCREL22F:
3523 r_field = e_fsel;
3525 if (r_type == (unsigned int) R_PARISC_PCREL17F)
3527 max_branch_offset = (1 << (17-1)) << 2;
3529 else if (r_type == (unsigned int) R_PARISC_PCREL12F)
3531 max_branch_offset = (1 << (12-1)) << 2;
3533 else
3535 max_branch_offset = (1 << (22-1)) << 2;
3538 /* sym_sec is NULL on undefined weak syms or when shared on
3539 undefined syms. We've already checked for a stub for the
3540 shared undefined case. */
3541 if (sym_sec == NULL)
3542 break;
3544 /* If the branch is out of reach, then redirect the
3545 call to the local stub for this function. */
3546 if (value + addend + max_branch_offset >= 2*max_branch_offset)
3548 stub_entry = hppa_get_stub_entry (input_section, sym_sec,
3549 h, rel, htab);
3550 if (stub_entry == NULL)
3551 return bfd_reloc_undefined;
3553 /* Munge up the value and addend so that we call the stub
3554 rather than the procedure directly. */
3555 value = (stub_entry->stub_offset
3556 + stub_entry->stub_sec->output_offset
3557 + stub_entry->stub_sec->output_section->vma
3558 - location);
3559 addend = -8;
3561 break;
3563 /* Something we don't know how to handle. */
3564 default:
3565 return bfd_reloc_notsupported;
3568 /* Make sure we can reach the stub. */
3569 if (max_branch_offset != 0
3570 && value + addend + max_branch_offset >= 2*max_branch_offset)
3572 (*_bfd_error_handler)
3573 (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
3574 bfd_archive_filename (input_bfd),
3575 input_section->name,
3576 (long) rel->r_offset,
3577 stub_entry->root.string);
3578 bfd_set_error (bfd_error_bad_value);
3579 return bfd_reloc_notsupported;
3582 val = hppa_field_adjust (value, addend, r_field);
3584 switch (r_type)
3586 case R_PARISC_PCREL12F:
3587 case R_PARISC_PCREL17C:
3588 case R_PARISC_PCREL17F:
3589 case R_PARISC_PCREL17R:
3590 case R_PARISC_PCREL22F:
3591 case R_PARISC_DIR17F:
3592 case R_PARISC_DIR17R:
3593 /* This is a branch. Divide the offset by four.
3594 Note that we need to decide whether it's a branch or
3595 otherwise by inspecting the reloc. Inspecting insn won't
3596 work as insn might be from a .word directive. */
3597 val >>= 2;
3598 break;
3600 default:
3601 break;
3604 insn = hppa_rebuild_insn (insn, val, r_format);
3606 /* Update the instruction word. */
3607 bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data);
3608 return bfd_reloc_ok;
3611 /* Relocate an HPPA ELF section. */
3613 static bfd_boolean
3614 elf32_hppa_relocate_section (output_bfd, info, input_bfd, input_section,
3615 contents, relocs, local_syms, local_sections)
3616 bfd *output_bfd;
3617 struct bfd_link_info *info;
3618 bfd *input_bfd;
3619 asection *input_section;
3620 bfd_byte *contents;
3621 Elf_Internal_Rela *relocs;
3622 Elf_Internal_Sym *local_syms;
3623 asection **local_sections;
3625 bfd_vma *local_got_offsets;
3626 struct elf32_hppa_link_hash_table *htab;
3627 Elf_Internal_Shdr *symtab_hdr;
3628 Elf_Internal_Rela *rel;
3629 Elf_Internal_Rela *relend;
3631 if (info->relocateable)
3632 return TRUE;
3634 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3636 htab = hppa_link_hash_table (info);
3637 local_got_offsets = elf_local_got_offsets (input_bfd);
3639 rel = relocs;
3640 relend = relocs + input_section->reloc_count;
3641 for (; rel < relend; rel++)
3643 unsigned int r_type;
3644 reloc_howto_type *howto;
3645 unsigned int r_symndx;
3646 struct elf32_hppa_link_hash_entry *h;
3647 Elf_Internal_Sym *sym;
3648 asection *sym_sec;
3649 bfd_vma relocation;
3650 bfd_reloc_status_type r;
3651 const char *sym_name;
3652 bfd_boolean plabel;
3653 bfd_boolean warned_undef;
3655 r_type = ELF32_R_TYPE (rel->r_info);
3656 if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
3658 bfd_set_error (bfd_error_bad_value);
3659 return FALSE;
3661 if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY
3662 || r_type == (unsigned int) R_PARISC_GNU_VTINHERIT)
3663 continue;
3665 /* This is a final link. */
3666 r_symndx = ELF32_R_SYM (rel->r_info);
3667 h = NULL;
3668 sym = NULL;
3669 sym_sec = NULL;
3670 warned_undef = FALSE;
3671 if (r_symndx < symtab_hdr->sh_info)
3673 /* This is a local symbol, h defaults to NULL. */
3674 sym = local_syms + r_symndx;
3675 sym_sec = local_sections[r_symndx];
3676 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sym_sec, rel);
3678 else
3680 int indx;
3682 /* It's a global; Find its entry in the link hash. */
3683 indx = r_symndx - symtab_hdr->sh_info;
3684 h = ((struct elf32_hppa_link_hash_entry *)
3685 elf_sym_hashes (input_bfd)[indx]);
3686 while (h->elf.root.type == bfd_link_hash_indirect
3687 || h->elf.root.type == bfd_link_hash_warning)
3688 h = (struct elf32_hppa_link_hash_entry *) h->elf.root.u.i.link;
3690 relocation = 0;
3691 if (h->elf.root.type == bfd_link_hash_defined
3692 || h->elf.root.type == bfd_link_hash_defweak)
3694 sym_sec = h->elf.root.u.def.section;
3695 /* If sym_sec->output_section is NULL, then it's a
3696 symbol defined in a shared library. */
3697 if (sym_sec->output_section != NULL)
3698 relocation = (h->elf.root.u.def.value
3699 + sym_sec->output_offset
3700 + sym_sec->output_section->vma);
3702 else if (h->elf.root.type == bfd_link_hash_undefweak)
3704 else if (info->shared && !info->no_undefined
3705 && ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
3706 && h->elf.type != STT_PARISC_MILLI)
3708 if (info->symbolic && !info->allow_shlib_undefined)
3710 if (!((*info->callbacks->undefined_symbol)
3711 (info, h->elf.root.root.string, input_bfd,
3712 input_section, rel->r_offset, FALSE)))
3713 return FALSE;
3714 warned_undef = TRUE;
3717 else
3719 if (!((*info->callbacks->undefined_symbol)
3720 (info, h->elf.root.root.string, input_bfd,
3721 input_section, rel->r_offset, TRUE)))
3722 return FALSE;
3723 warned_undef = TRUE;
3727 /* Do any required modifications to the relocation value, and
3728 determine what types of dynamic info we need to output, if
3729 any. */
3730 plabel = 0;
3731 switch (r_type)
3733 case R_PARISC_DLTIND14F:
3734 case R_PARISC_DLTIND14R:
3735 case R_PARISC_DLTIND21L:
3737 bfd_vma off;
3738 bfd_boolean do_got = 0;
3740 /* Relocation is to the entry for this symbol in the
3741 global offset table. */
3742 if (h != NULL)
3744 bfd_boolean dyn;
3746 off = h->elf.got.offset;
3747 dyn = htab->elf.dynamic_sections_created;
3748 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, &h->elf))
3750 /* If we aren't going to call finish_dynamic_symbol,
3751 then we need to handle initialisation of the .got
3752 entry and create needed relocs here. Since the
3753 offset must always be a multiple of 4, we use the
3754 least significant bit to record whether we have
3755 initialised it already. */
3756 if ((off & 1) != 0)
3757 off &= ~1;
3758 else
3760 h->elf.got.offset |= 1;
3761 do_got = 1;
3765 else
3767 /* Local symbol case. */
3768 if (local_got_offsets == NULL)
3769 abort ();
3771 off = local_got_offsets[r_symndx];
3773 /* The offset must always be a multiple of 4. We use
3774 the least significant bit to record whether we have
3775 already generated the necessary reloc. */
3776 if ((off & 1) != 0)
3777 off &= ~1;
3778 else
3780 local_got_offsets[r_symndx] |= 1;
3781 do_got = 1;
3785 if (do_got)
3787 if (info->shared)
3789 /* Output a dynamic relocation for this GOT entry.
3790 In this case it is relative to the base of the
3791 object because the symbol index is zero. */
3792 Elf_Internal_Rela outrel;
3793 bfd_byte *loc;
3794 asection *s = htab->srelgot;
3796 outrel.r_offset = (off
3797 + htab->sgot->output_offset
3798 + htab->sgot->output_section->vma);
3799 outrel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
3800 outrel.r_addend = relocation;
3801 loc = s->contents;
3802 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
3803 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3805 else
3806 bfd_put_32 (output_bfd, relocation,
3807 htab->sgot->contents + off);
3810 if (off >= (bfd_vma) -2)
3811 abort ();
3813 /* Add the base of the GOT to the relocation value. */
3814 relocation = (off
3815 + htab->sgot->output_offset
3816 + htab->sgot->output_section->vma);
3818 break;
3820 case R_PARISC_SEGREL32:
3821 /* If this is the first SEGREL relocation, then initialize
3822 the segment base values. */
3823 if (htab->text_segment_base == (bfd_vma) -1)
3824 bfd_map_over_sections (output_bfd, hppa_record_segment_addr, htab);
3825 break;
3827 case R_PARISC_PLABEL14R:
3828 case R_PARISC_PLABEL21L:
3829 case R_PARISC_PLABEL32:
3830 if (htab->elf.dynamic_sections_created)
3832 bfd_vma off;
3833 bfd_boolean do_plt = 0;
3835 /* If we have a global symbol with a PLT slot, then
3836 redirect this relocation to it. */
3837 if (h != NULL)
3839 off = h->elf.plt.offset;
3840 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, &h->elf))
3842 /* In a non-shared link, adjust_dynamic_symbols
3843 isn't called for symbols forced local. We
3844 need to write out the plt entry here. */
3845 if ((off & 1) != 0)
3846 off &= ~1;
3847 else
3849 h->elf.plt.offset |= 1;
3850 do_plt = 1;
3854 else
3856 bfd_vma *local_plt_offsets;
3858 if (local_got_offsets == NULL)
3859 abort ();
3861 local_plt_offsets = local_got_offsets + symtab_hdr->sh_info;
3862 off = local_plt_offsets[r_symndx];
3864 /* As for the local .got entry case, we use the last
3865 bit to record whether we've already initialised
3866 this local .plt entry. */
3867 if ((off & 1) != 0)
3868 off &= ~1;
3869 else
3871 local_plt_offsets[r_symndx] |= 1;
3872 do_plt = 1;
3876 if (do_plt)
3878 if (info->shared)
3880 /* Output a dynamic IPLT relocation for this
3881 PLT entry. */
3882 Elf_Internal_Rela outrel;
3883 bfd_byte *loc;
3884 asection *s = htab->srelplt;
3886 outrel.r_offset = (off
3887 + htab->splt->output_offset
3888 + htab->splt->output_section->vma);
3889 outrel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
3890 outrel.r_addend = relocation;
3891 loc = s->contents;
3892 loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
3893 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3895 else
3897 bfd_put_32 (output_bfd,
3898 relocation,
3899 htab->splt->contents + off);
3900 bfd_put_32 (output_bfd,
3901 elf_gp (htab->splt->output_section->owner),
3902 htab->splt->contents + off + 4);
3906 if (off >= (bfd_vma) -2)
3907 abort ();
3909 /* PLABELs contain function pointers. Relocation is to
3910 the entry for the function in the .plt. The magic +2
3911 offset signals to $$dyncall that the function pointer
3912 is in the .plt and thus has a gp pointer too.
3913 Exception: Undefined PLABELs should have a value of
3914 zero. */
3915 if (h == NULL
3916 || (h->elf.root.type != bfd_link_hash_undefweak
3917 && h->elf.root.type != bfd_link_hash_undefined))
3919 relocation = (off
3920 + htab->splt->output_offset
3921 + htab->splt->output_section->vma
3922 + 2);
3924 plabel = 1;
3926 /* Fall through and possibly emit a dynamic relocation. */
3928 case R_PARISC_DIR17F:
3929 case R_PARISC_DIR17R:
3930 case R_PARISC_DIR14F:
3931 case R_PARISC_DIR14R:
3932 case R_PARISC_DIR21L:
3933 case R_PARISC_DPREL14F:
3934 case R_PARISC_DPREL14R:
3935 case R_PARISC_DPREL21L:
3936 case R_PARISC_DIR32:
3937 /* r_symndx will be zero only for relocs against symbols
3938 from removed linkonce sections, or sections discarded by
3939 a linker script. */
3940 if (r_symndx == 0
3941 || (input_section->flags & SEC_ALLOC) == 0)
3942 break;
3944 /* The reloc types handled here and this conditional
3945 expression must match the code in ..check_relocs and
3946 allocate_dynrelocs. ie. We need exactly the same condition
3947 as in ..check_relocs, with some extra conditions (dynindx
3948 test in this case) to cater for relocs removed by
3949 allocate_dynrelocs. If you squint, the non-shared test
3950 here does indeed match the one in ..check_relocs, the
3951 difference being that here we test DEF_DYNAMIC as well as
3952 !DEF_REGULAR. All common syms end up with !DEF_REGULAR,
3953 which is why we can't use just that test here.
3954 Conversely, DEF_DYNAMIC can't be used in check_relocs as
3955 there all files have not been loaded. */
3956 if ((info->shared
3957 && (IS_ABSOLUTE_RELOC (r_type)
3958 || (h != NULL
3959 && h->elf.dynindx != -1
3960 && (!info->symbolic
3961 || (h->elf.elf_link_hash_flags
3962 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3963 || (!info->shared
3964 && h != NULL
3965 && h->elf.dynindx != -1
3966 && (h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3967 && (((h->elf.elf_link_hash_flags
3968 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3969 && (h->elf.elf_link_hash_flags
3970 & ELF_LINK_HASH_DEF_REGULAR) == 0)
3971 || h->elf.root.type == bfd_link_hash_undefweak
3972 || h->elf.root.type == bfd_link_hash_undefined)))
3974 Elf_Internal_Rela outrel;
3975 bfd_boolean skip;
3976 asection *sreloc;
3977 bfd_byte *loc;
3979 /* When generating a shared object, these relocations
3980 are copied into the output file to be resolved at run
3981 time. */
3983 outrel.r_addend = rel->r_addend;
3984 outrel.r_offset =
3985 _bfd_elf_section_offset (output_bfd, info, input_section,
3986 rel->r_offset);
3987 skip = (outrel.r_offset == (bfd_vma) -1
3988 || outrel.r_offset == (bfd_vma) -2);
3989 outrel.r_offset += (input_section->output_offset
3990 + input_section->output_section->vma);
3992 if (skip)
3994 memset (&outrel, 0, sizeof (outrel));
3996 else if (h != NULL
3997 && h->elf.dynindx != -1
3998 && (plabel
3999 || !IS_ABSOLUTE_RELOC (r_type)
4000 || !info->shared
4001 || !info->symbolic
4002 || (h->elf.elf_link_hash_flags
4003 & ELF_LINK_HASH_DEF_REGULAR) == 0))
4005 outrel.r_info = ELF32_R_INFO (h->elf.dynindx, r_type);
4007 else /* It's a local symbol, or one marked to become local. */
4009 int indx = 0;
4011 /* Add the absolute offset of the symbol. */
4012 outrel.r_addend += relocation;
4014 /* Global plabels need to be processed by the
4015 dynamic linker so that functions have at most one
4016 fptr. For this reason, we need to differentiate
4017 between global and local plabels, which we do by
4018 providing the function symbol for a global plabel
4019 reloc, and no symbol for local plabels. */
4020 if (! plabel
4021 && sym_sec != NULL
4022 && sym_sec->output_section != NULL
4023 && ! bfd_is_abs_section (sym_sec))
4025 indx = elf_section_data (sym_sec->output_section)->dynindx;
4026 /* We are turning this relocation into one
4027 against a section symbol, so subtract out the
4028 output section's address but not the offset
4029 of the input section in the output section. */
4030 outrel.r_addend -= sym_sec->output_section->vma;
4033 outrel.r_info = ELF32_R_INFO (indx, r_type);
4035 #if 0
4036 /* EH info can cause unaligned DIR32 relocs.
4037 Tweak the reloc type for the dynamic linker. */
4038 if (r_type == R_PARISC_DIR32 && (outrel.r_offset & 3) != 0)
4039 outrel.r_info = ELF32_R_INFO (ELF32_R_SYM (outrel.r_info),
4040 R_PARISC_DIR32U);
4041 #endif
4042 sreloc = elf_section_data (input_section)->sreloc;
4043 if (sreloc == NULL)
4044 abort ();
4046 loc = sreloc->contents;
4047 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
4048 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4050 break;
4052 default:
4053 break;
4056 r = final_link_relocate (input_section, contents, rel, relocation,
4057 htab, sym_sec, h);
4059 if (r == bfd_reloc_ok)
4060 continue;
4062 if (h != NULL)
4063 sym_name = h->elf.root.root.string;
4064 else
4066 sym_name = bfd_elf_string_from_elf_section (input_bfd,
4067 symtab_hdr->sh_link,
4068 sym->st_name);
4069 if (sym_name == NULL)
4070 return FALSE;
4071 if (*sym_name == '\0')
4072 sym_name = bfd_section_name (input_bfd, sym_sec);
4075 howto = elf_hppa_howto_table + r_type;
4077 if (r == bfd_reloc_undefined || r == bfd_reloc_notsupported)
4079 if (r == bfd_reloc_notsupported || !warned_undef)
4081 (*_bfd_error_handler)
4082 (_("%s(%s+0x%lx): cannot handle %s for %s"),
4083 bfd_archive_filename (input_bfd),
4084 input_section->name,
4085 (long) rel->r_offset,
4086 howto->name,
4087 sym_name);
4088 bfd_set_error (bfd_error_bad_value);
4089 return FALSE;
4092 else
4094 if (!((*info->callbacks->reloc_overflow)
4095 (info, sym_name, howto->name, (bfd_vma) 0,
4096 input_bfd, input_section, rel->r_offset)))
4097 return FALSE;
4101 return TRUE;
4104 /* Finish up dynamic symbol handling. We set the contents of various
4105 dynamic sections here. */
4107 static bfd_boolean
4108 elf32_hppa_finish_dynamic_symbol (output_bfd, info, h, sym)
4109 bfd *output_bfd;
4110 struct bfd_link_info *info;
4111 struct elf_link_hash_entry *h;
4112 Elf_Internal_Sym *sym;
4114 struct elf32_hppa_link_hash_table *htab;
4116 htab = hppa_link_hash_table (info);
4118 if (h->plt.offset != (bfd_vma) -1)
4120 bfd_vma value;
4122 if (h->plt.offset & 1)
4123 abort ();
4125 /* This symbol has an entry in the procedure linkage table. Set
4126 it up.
4128 The format of a plt entry is
4129 <funcaddr>
4130 <__gp>
4132 value = 0;
4133 if (h->root.type == bfd_link_hash_defined
4134 || h->root.type == bfd_link_hash_defweak)
4136 value = h->root.u.def.value;
4137 if (h->root.u.def.section->output_section != NULL)
4138 value += (h->root.u.def.section->output_offset
4139 + h->root.u.def.section->output_section->vma);
4142 if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call)
4144 Elf_Internal_Rela rel;
4145 bfd_byte *loc;
4147 /* Create a dynamic IPLT relocation for this entry. */
4148 rel.r_offset = (h->plt.offset
4149 + htab->splt->output_offset
4150 + htab->splt->output_section->vma);
4151 if (h->dynindx != -1)
4153 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_IPLT);
4154 rel.r_addend = 0;
4156 else
4158 /* This symbol has been marked to become local, and is
4159 used by a plabel so must be kept in the .plt. */
4160 rel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
4161 rel.r_addend = value;
4164 loc = htab->srelplt->contents;
4165 loc += htab->srelplt->reloc_count++ * sizeof (Elf32_External_Rela);
4166 bfd_elf32_swap_reloca_out (htab->splt->output_section->owner,
4167 &rel, loc);
4169 else
4171 bfd_put_32 (htab->splt->owner,
4172 value,
4173 htab->splt->contents + h->plt.offset);
4174 bfd_put_32 (htab->splt->owner,
4175 elf_gp (htab->splt->output_section->owner),
4176 htab->splt->contents + h->plt.offset + 4);
4179 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4181 /* Mark the symbol as undefined, rather than as defined in
4182 the .plt section. Leave the value alone. */
4183 sym->st_shndx = SHN_UNDEF;
4187 if (h->got.offset != (bfd_vma) -1)
4189 Elf_Internal_Rela rel;
4190 bfd_byte *loc;
4192 /* This symbol has an entry in the global offset table. Set it
4193 up. */
4195 rel.r_offset = ((h->got.offset &~ (bfd_vma) 1)
4196 + htab->sgot->output_offset
4197 + htab->sgot->output_section->vma);
4199 /* If this is a -Bsymbolic link and the symbol is defined
4200 locally or was forced to be local because of a version file,
4201 we just want to emit a RELATIVE reloc. The entry in the
4202 global offset table will already have been initialized in the
4203 relocate_section function. */
4204 if (info->shared
4205 && (info->symbolic || h->dynindx == -1)
4206 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
4208 rel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
4209 rel.r_addend = (h->root.u.def.value
4210 + h->root.u.def.section->output_offset
4211 + h->root.u.def.section->output_section->vma);
4213 else
4215 if ((h->got.offset & 1) != 0)
4216 abort ();
4217 bfd_put_32 (output_bfd, (bfd_vma) 0,
4218 htab->sgot->contents + h->got.offset);
4219 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_DIR32);
4220 rel.r_addend = 0;
4223 loc = htab->srelgot->contents;
4224 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
4225 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
4228 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4230 asection *s;
4231 Elf_Internal_Rela rel;
4232 bfd_byte *loc;
4234 /* This symbol needs a copy reloc. Set it up. */
4236 if (! (h->dynindx != -1
4237 && (h->root.type == bfd_link_hash_defined
4238 || h->root.type == bfd_link_hash_defweak)))
4239 abort ();
4241 s = htab->srelbss;
4243 rel.r_offset = (h->root.u.def.value
4244 + h->root.u.def.section->output_offset
4245 + h->root.u.def.section->output_section->vma);
4246 rel.r_addend = 0;
4247 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_COPY);
4248 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
4249 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
4252 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4253 if (h->root.root.string[0] == '_'
4254 && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4255 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0))
4257 sym->st_shndx = SHN_ABS;
4260 return TRUE;
4263 /* Used to decide how to sort relocs in an optimal manner for the
4264 dynamic linker, before writing them out. */
4266 static enum elf_reloc_type_class
4267 elf32_hppa_reloc_type_class (rela)
4268 const Elf_Internal_Rela *rela;
4270 if (ELF32_R_SYM (rela->r_info) == 0)
4271 return reloc_class_relative;
4273 switch ((int) ELF32_R_TYPE (rela->r_info))
4275 case R_PARISC_IPLT:
4276 return reloc_class_plt;
4277 case R_PARISC_COPY:
4278 return reloc_class_copy;
4279 default:
4280 return reloc_class_normal;
4284 /* Finish up the dynamic sections. */
4286 static bfd_boolean
4287 elf32_hppa_finish_dynamic_sections (output_bfd, info)
4288 bfd *output_bfd;
4289 struct bfd_link_info *info;
4291 bfd *dynobj;
4292 struct elf32_hppa_link_hash_table *htab;
4293 asection *sdyn;
4295 htab = hppa_link_hash_table (info);
4296 dynobj = htab->elf.dynobj;
4298 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4300 if (htab->elf.dynamic_sections_created)
4302 Elf32_External_Dyn *dyncon, *dynconend;
4304 if (sdyn == NULL)
4305 abort ();
4307 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4308 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4309 for (; dyncon < dynconend; dyncon++)
4311 Elf_Internal_Dyn dyn;
4312 asection *s;
4314 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4316 switch (dyn.d_tag)
4318 default:
4319 continue;
4321 case DT_PLTGOT:
4322 /* Use PLTGOT to set the GOT register. */
4323 dyn.d_un.d_ptr = elf_gp (output_bfd);
4324 break;
4326 case DT_JMPREL:
4327 s = htab->srelplt;
4328 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4329 break;
4331 case DT_PLTRELSZ:
4332 s = htab->srelplt;
4333 dyn.d_un.d_val = s->_raw_size;
4334 break;
4336 case DT_RELASZ:
4337 /* Don't count procedure linkage table relocs in the
4338 overall reloc count. */
4339 s = htab->srelplt;
4340 if (s == NULL)
4341 continue;
4342 dyn.d_un.d_val -= s->_raw_size;
4343 break;
4345 case DT_RELA:
4346 /* We may not be using the standard ELF linker script.
4347 If .rela.plt is the first .rela section, we adjust
4348 DT_RELA to not include it. */
4349 s = htab->srelplt;
4350 if (s == NULL)
4351 continue;
4352 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4353 continue;
4354 dyn.d_un.d_ptr += s->_raw_size;
4355 break;
4358 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4362 if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
4364 /* Fill in the first entry in the global offset table.
4365 We use it to point to our dynamic section, if we have one. */
4366 bfd_put_32 (output_bfd,
4367 (sdyn != NULL
4368 ? sdyn->output_section->vma + sdyn->output_offset
4369 : (bfd_vma) 0),
4370 htab->sgot->contents);
4372 /* The second entry is reserved for use by the dynamic linker. */
4373 memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
4375 /* Set .got entry size. */
4376 elf_section_data (htab->sgot->output_section)
4377 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
4380 if (htab->splt != NULL && htab->splt->_raw_size != 0)
4382 /* Set plt entry size. */
4383 elf_section_data (htab->splt->output_section)
4384 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
4386 if (htab->need_plt_stub)
4388 /* Set up the .plt stub. */
4389 memcpy (htab->splt->contents
4390 + htab->splt->_raw_size - sizeof (plt_stub),
4391 plt_stub, sizeof (plt_stub));
4393 if ((htab->splt->output_offset
4394 + htab->splt->output_section->vma
4395 + htab->splt->_raw_size)
4396 != (htab->sgot->output_offset
4397 + htab->sgot->output_section->vma))
4399 (*_bfd_error_handler)
4400 (_(".got section not immediately after .plt section"));
4401 return FALSE;
4406 return TRUE;
4409 /* Tweak the OSABI field of the elf header. */
4411 static void
4412 elf32_hppa_post_process_headers (abfd, link_info)
4413 bfd *abfd;
4414 struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
4416 Elf_Internal_Ehdr * i_ehdrp;
4418 i_ehdrp = elf_elfheader (abfd);
4420 if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0)
4422 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
4424 else
4426 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_HPUX;
4430 /* Called when writing out an object file to decide the type of a
4431 symbol. */
4432 static int
4433 elf32_hppa_elf_get_symbol_type (elf_sym, type)
4434 Elf_Internal_Sym *elf_sym;
4435 int type;
4437 if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI)
4438 return STT_PARISC_MILLI;
4439 else
4440 return type;
4443 /* Misc BFD support code. */
4444 #define bfd_elf32_bfd_is_local_label_name elf_hppa_is_local_label_name
4445 #define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
4446 #define elf_info_to_howto elf_hppa_info_to_howto
4447 #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel
4449 /* Stuff for the BFD linker. */
4450 #define bfd_elf32_bfd_final_link elf32_hppa_final_link
4451 #define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create
4452 #define bfd_elf32_bfd_link_hash_table_free elf32_hppa_link_hash_table_free
4453 #define elf_backend_add_symbol_hook elf32_hppa_add_symbol_hook
4454 #define elf_backend_adjust_dynamic_symbol elf32_hppa_adjust_dynamic_symbol
4455 #define elf_backend_copy_indirect_symbol elf32_hppa_copy_indirect_symbol
4456 #define elf_backend_check_relocs elf32_hppa_check_relocs
4457 #define elf_backend_create_dynamic_sections elf32_hppa_create_dynamic_sections
4458 #define elf_backend_fake_sections elf_hppa_fake_sections
4459 #define elf_backend_relocate_section elf32_hppa_relocate_section
4460 #define elf_backend_hide_symbol elf32_hppa_hide_symbol
4461 #define elf_backend_finish_dynamic_symbol elf32_hppa_finish_dynamic_symbol
4462 #define elf_backend_finish_dynamic_sections elf32_hppa_finish_dynamic_sections
4463 #define elf_backend_size_dynamic_sections elf32_hppa_size_dynamic_sections
4464 #define elf_backend_gc_mark_hook elf32_hppa_gc_mark_hook
4465 #define elf_backend_gc_sweep_hook elf32_hppa_gc_sweep_hook
4466 #define elf_backend_object_p elf32_hppa_object_p
4467 #define elf_backend_final_write_processing elf_hppa_final_write_processing
4468 #define elf_backend_post_process_headers elf32_hppa_post_process_headers
4469 #define elf_backend_get_symbol_type elf32_hppa_elf_get_symbol_type
4470 #define elf_backend_reloc_type_class elf32_hppa_reloc_type_class
4472 #define elf_backend_can_gc_sections 1
4473 #define elf_backend_can_refcount 1
4474 #define elf_backend_plt_alignment 2
4475 #define elf_backend_want_got_plt 0
4476 #define elf_backend_plt_readonly 0
4477 #define elf_backend_want_plt_sym 0
4478 #define elf_backend_got_header_size 8
4479 #define elf_backend_rela_normal 1
4481 #define TARGET_BIG_SYM bfd_elf32_hppa_vec
4482 #define TARGET_BIG_NAME "elf32-hppa"
4483 #define ELF_ARCH bfd_arch_hppa
4484 #define ELF_MACHINE_CODE EM_PARISC
4485 #define ELF_MAXPAGESIZE 0x1000
4487 #include "elf32-target.h"
4489 #undef TARGET_BIG_SYM
4490 #define TARGET_BIG_SYM bfd_elf32_hppa_linux_vec
4491 #undef TARGET_BIG_NAME
4492 #define TARGET_BIG_NAME "elf32-hppa-linux"
4494 #define INCLUDED_TARGET_FILE 1
4495 #include "elf32-target.h"