* symbols.c: Replace CONST by const throughout.
[binutils.git] / bfd / elf32-hppa.c
blob684213514cda1890b4b7b2757e5f6f0290f32ce9
1 /* BFD back-end for HP PA-RISC ELF files.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001,
3 2002 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 boolean hppa_build_one_stub
314 PARAMS ((struct bfd_hash_entry *, PTR));
316 static boolean hppa_size_one_stub
317 PARAMS ((struct bfd_hash_entry *, PTR));
319 /* BFD and elf backend functions. */
320 static boolean elf32_hppa_object_p PARAMS ((bfd *));
322 static 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 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_link_hash_entry *, struct elf_link_hash_entry *));
332 static boolean elf32_hppa_check_relocs
333 PARAMS ((bfd *, struct bfd_link_info *,
334 asection *, const Elf_Internal_Rela *));
336 static asection *elf32_hppa_gc_mark_hook
337 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
338 struct elf_link_hash_entry *, Elf_Internal_Sym *));
340 static boolean elf32_hppa_gc_sweep_hook
341 PARAMS ((bfd *, struct bfd_link_info *,
342 asection *, const Elf_Internal_Rela *));
344 static void elf32_hppa_hide_symbol
345 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
347 static boolean elf32_hppa_adjust_dynamic_symbol
348 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
350 static boolean mark_PIC_calls
351 PARAMS ((struct elf_link_hash_entry *, PTR));
353 static boolean allocate_plt_static
354 PARAMS ((struct elf_link_hash_entry *, PTR));
356 static boolean allocate_dynrelocs
357 PARAMS ((struct elf_link_hash_entry *, PTR));
359 static boolean readonly_dynrelocs
360 PARAMS ((struct elf_link_hash_entry *, PTR));
362 static boolean clobber_millicode_symbols
363 PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *));
365 static boolean elf32_hppa_size_dynamic_sections
366 PARAMS ((bfd *, struct bfd_link_info *));
368 static void group_sections
369 PARAMS ((struct elf32_hppa_link_hash_table *, bfd_size_type, boolean));
371 static int get_local_syms
372 PARAMS ((bfd *, bfd *, struct bfd_link_info *));
374 static boolean elf32_hppa_final_link
375 PARAMS ((bfd *, struct bfd_link_info *));
377 static void hppa_record_segment_addr
378 PARAMS ((bfd *, asection *, PTR));
380 static bfd_reloc_status_type final_link_relocate
381 PARAMS ((asection *, bfd_byte *, const Elf_Internal_Rela *,
382 bfd_vma, struct elf32_hppa_link_hash_table *, asection *,
383 struct elf32_hppa_link_hash_entry *));
385 static boolean elf32_hppa_relocate_section
386 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
387 bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
389 static boolean elf32_hppa_finish_dynamic_symbol
390 PARAMS ((bfd *, struct bfd_link_info *,
391 struct elf_link_hash_entry *, Elf_Internal_Sym *));
393 static enum elf_reloc_type_class elf32_hppa_reloc_type_class
394 PARAMS ((const Elf_Internal_Rela *));
396 static boolean elf32_hppa_finish_dynamic_sections
397 PARAMS ((bfd *, struct bfd_link_info *));
399 static void elf32_hppa_post_process_headers
400 PARAMS ((bfd *, struct bfd_link_info *));
402 static int elf32_hppa_elf_get_symbol_type
403 PARAMS ((Elf_Internal_Sym *, int));
405 /* Assorted hash table functions. */
407 /* Initialize an entry in the stub hash table. */
409 static struct bfd_hash_entry *
410 stub_hash_newfunc (entry, table, string)
411 struct bfd_hash_entry *entry;
412 struct bfd_hash_table *table;
413 const char *string;
415 /* Allocate the structure if it has not already been allocated by a
416 subclass. */
417 if (entry == NULL)
419 entry = bfd_hash_allocate (table,
420 sizeof (struct elf32_hppa_stub_hash_entry));
421 if (entry == NULL)
422 return entry;
425 /* Call the allocation method of the superclass. */
426 entry = bfd_hash_newfunc (entry, table, string);
427 if (entry != NULL)
429 struct elf32_hppa_stub_hash_entry *eh;
431 /* Initialize the local fields. */
432 eh = (struct elf32_hppa_stub_hash_entry *) entry;
433 eh->stub_sec = NULL;
434 eh->stub_offset = 0;
435 eh->target_value = 0;
436 eh->target_section = NULL;
437 eh->stub_type = hppa_stub_long_branch;
438 eh->h = NULL;
439 eh->id_sec = NULL;
442 return entry;
445 /* Initialize an entry in the link hash table. */
447 static struct bfd_hash_entry *
448 hppa_link_hash_newfunc (entry, table, string)
449 struct bfd_hash_entry *entry;
450 struct bfd_hash_table *table;
451 const char *string;
453 /* Allocate the structure if it has not already been allocated by a
454 subclass. */
455 if (entry == NULL)
457 entry = bfd_hash_allocate (table,
458 sizeof (struct elf32_hppa_link_hash_entry));
459 if (entry == NULL)
460 return entry;
463 /* Call the allocation method of the superclass. */
464 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
465 if (entry != NULL)
467 struct elf32_hppa_link_hash_entry *eh;
469 /* Initialize the local fields. */
470 eh = (struct elf32_hppa_link_hash_entry *) entry;
471 eh->stub_cache = NULL;
472 eh->dyn_relocs = NULL;
473 eh->pic_call = 0;
474 eh->plabel = 0;
477 return entry;
480 /* Create the derived linker hash table. The PA ELF port uses the derived
481 hash table to keep information specific to the PA ELF linker (without
482 using static variables). */
484 static struct bfd_link_hash_table *
485 elf32_hppa_link_hash_table_create (abfd)
486 bfd *abfd;
488 struct elf32_hppa_link_hash_table *ret;
489 bfd_size_type amt = sizeof (*ret);
491 ret = (struct elf32_hppa_link_hash_table *) bfd_malloc (amt);
492 if (ret == NULL)
493 return NULL;
495 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, hppa_link_hash_newfunc))
497 free (ret);
498 return NULL;
501 /* Init the stub hash table too. */
502 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc))
503 return NULL;
505 ret->stub_bfd = NULL;
506 ret->add_stub_section = NULL;
507 ret->layout_sections_again = NULL;
508 ret->stub_group = NULL;
509 ret->sgot = NULL;
510 ret->srelgot = NULL;
511 ret->splt = NULL;
512 ret->srelplt = NULL;
513 ret->sdynbss = NULL;
514 ret->srelbss = NULL;
515 ret->text_segment_base = (bfd_vma) -1;
516 ret->data_segment_base = (bfd_vma) -1;
517 ret->multi_subspace = 0;
518 ret->has_12bit_branch = 0;
519 ret->has_17bit_branch = 0;
520 ret->has_22bit_branch = 0;
521 ret->need_plt_stub = 0;
522 ret->sym_sec.abfd = NULL;
524 return &ret->elf.root;
527 /* Free the derived linker hash table. */
529 static void
530 elf32_hppa_link_hash_table_free (hash)
531 struct bfd_link_hash_table *hash;
533 struct elf32_hppa_link_hash_table *ret
534 = (struct elf32_hppa_link_hash_table *) hash;
536 bfd_hash_table_free (&ret->stub_hash_table);
537 _bfd_generic_link_hash_table_free (hash);
540 /* Build a name for an entry in the stub hash table. */
542 static char *
543 hppa_stub_name (input_section, sym_sec, hash, rel)
544 const asection *input_section;
545 const asection *sym_sec;
546 const struct elf32_hppa_link_hash_entry *hash;
547 const Elf_Internal_Rela *rel;
549 char *stub_name;
550 bfd_size_type len;
552 if (hash)
554 len = 8 + 1 + strlen (hash->elf.root.root.string) + 1 + 8 + 1;
555 stub_name = bfd_malloc (len);
556 if (stub_name != NULL)
558 sprintf (stub_name, "%08x_%s+%x",
559 input_section->id & 0xffffffff,
560 hash->elf.root.root.string,
561 (int) rel->r_addend & 0xffffffff);
564 else
566 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
567 stub_name = bfd_malloc (len);
568 if (stub_name != NULL)
570 sprintf (stub_name, "%08x_%x:%x+%x",
571 input_section->id & 0xffffffff,
572 sym_sec->id & 0xffffffff,
573 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
574 (int) rel->r_addend & 0xffffffff);
577 return stub_name;
580 /* Look up an entry in the stub hash. Stub entries are cached because
581 creating the stub name takes a bit of time. */
583 static struct elf32_hppa_stub_hash_entry *
584 hppa_get_stub_entry (input_section, sym_sec, hash, rel, htab)
585 const asection *input_section;
586 const asection *sym_sec;
587 struct elf32_hppa_link_hash_entry *hash;
588 const Elf_Internal_Rela *rel;
589 struct elf32_hppa_link_hash_table *htab;
591 struct elf32_hppa_stub_hash_entry *stub_entry;
592 const asection *id_sec;
594 /* If this input section is part of a group of sections sharing one
595 stub section, then use the id of the first section in the group.
596 Stub names need to include a section id, as there may well be
597 more than one stub used to reach say, printf, and we need to
598 distinguish between them. */
599 id_sec = htab->stub_group[input_section->id].link_sec;
601 if (hash != NULL && hash->stub_cache != NULL
602 && hash->stub_cache->h == hash
603 && hash->stub_cache->id_sec == id_sec)
605 stub_entry = hash->stub_cache;
607 else
609 char *stub_name;
611 stub_name = hppa_stub_name (id_sec, sym_sec, hash, rel);
612 if (stub_name == NULL)
613 return NULL;
615 stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table,
616 stub_name, false, false);
617 if (hash != NULL)
618 hash->stub_cache = stub_entry;
620 free (stub_name);
623 return stub_entry;
626 /* Add a new stub entry to the stub hash. Not all fields of the new
627 stub entry are initialised. */
629 static struct elf32_hppa_stub_hash_entry *
630 hppa_add_stub (stub_name, section, htab)
631 const char *stub_name;
632 asection *section;
633 struct elf32_hppa_link_hash_table *htab;
635 asection *link_sec;
636 asection *stub_sec;
637 struct elf32_hppa_stub_hash_entry *stub_entry;
639 link_sec = htab->stub_group[section->id].link_sec;
640 stub_sec = htab->stub_group[section->id].stub_sec;
641 if (stub_sec == NULL)
643 stub_sec = htab->stub_group[link_sec->id].stub_sec;
644 if (stub_sec == NULL)
646 bfd_size_type len;
647 char *s_name;
649 len = strlen (link_sec->name) + sizeof (STUB_SUFFIX);
650 s_name = bfd_alloc (htab->stub_bfd, len);
651 if (s_name == NULL)
652 return NULL;
654 strcpy (s_name, link_sec->name);
655 strcpy (s_name + len - sizeof (STUB_SUFFIX), STUB_SUFFIX);
656 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
657 if (stub_sec == NULL)
658 return NULL;
659 htab->stub_group[link_sec->id].stub_sec = stub_sec;
661 htab->stub_group[section->id].stub_sec = stub_sec;
664 /* Enter this entry into the linker stub hash table. */
665 stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table, stub_name,
666 true, false);
667 if (stub_entry == NULL)
669 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
670 bfd_archive_filename (section->owner),
671 stub_name);
672 return NULL;
675 stub_entry->stub_sec = stub_sec;
676 stub_entry->stub_offset = 0;
677 stub_entry->id_sec = link_sec;
678 return stub_entry;
681 /* Determine the type of stub needed, if any, for a call. */
683 static enum elf32_hppa_stub_type
684 hppa_type_of_stub (input_sec, rel, hash, destination)
685 asection *input_sec;
686 const Elf_Internal_Rela *rel;
687 struct elf32_hppa_link_hash_entry *hash;
688 bfd_vma destination;
690 bfd_vma location;
691 bfd_vma branch_offset;
692 bfd_vma max_branch_offset;
693 unsigned int r_type;
695 if (hash != NULL
696 && hash->elf.plt.offset != (bfd_vma) -1
697 && (hash->elf.dynindx != -1 || hash->pic_call)
698 && !hash->plabel)
700 /* We need an import stub. Decide between hppa_stub_import
701 and hppa_stub_import_shared later. */
702 return hppa_stub_import;
705 /* Determine where the call point is. */
706 location = (input_sec->output_offset
707 + input_sec->output_section->vma
708 + rel->r_offset);
710 branch_offset = destination - location - 8;
711 r_type = ELF32_R_TYPE (rel->r_info);
713 /* Determine if a long branch stub is needed. parisc branch offsets
714 are relative to the second instruction past the branch, ie. +8
715 bytes on from the branch instruction location. The offset is
716 signed and counts in units of 4 bytes. */
717 if (r_type == (unsigned int) R_PARISC_PCREL17F)
719 max_branch_offset = (1 << (17-1)) << 2;
721 else if (r_type == (unsigned int) R_PARISC_PCREL12F)
723 max_branch_offset = (1 << (12-1)) << 2;
725 else /* R_PARISC_PCREL22F. */
727 max_branch_offset = (1 << (22-1)) << 2;
730 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
731 return hppa_stub_long_branch;
733 return hppa_stub_none;
736 /* Build one linker stub as defined by the stub hash table entry GEN_ENTRY.
737 IN_ARG contains the link info pointer. */
739 #define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */
740 #define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */
742 #define BL_R1 0xe8200000 /* b,l .+8,%r1 */
743 #define ADDIL_R1 0x28200000 /* addil LR'XXX,%r1,%r1 */
744 #define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */
746 #define ADDIL_DP 0x2b600000 /* addil LR'XXX,%dp,%r1 */
747 #define LDW_R1_R21 0x48350000 /* ldw RR'XXX(%sr0,%r1),%r21 */
748 #define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */
749 #define LDW_R1_R19 0x48330000 /* ldw RR'XXX(%sr0,%r1),%r19 */
751 #define ADDIL_R19 0x2a600000 /* addil LR'XXX,%r19,%r1 */
752 #define LDW_R1_DP 0x483b0000 /* ldw RR'XXX(%sr0,%r1),%dp */
754 #define LDSID_R21_R1 0x02a010a1 /* ldsid (%sr0,%r21),%r1 */
755 #define MTSP_R1 0x00011820 /* mtsp %r1,%sr0 */
756 #define BE_SR0_R21 0xe2a00000 /* be 0(%sr0,%r21) */
757 #define STW_RP 0x6bc23fd1 /* stw %rp,-24(%sr0,%sp) */
759 #define BL22_RP 0xe800a002 /* b,l,n XXX,%rp */
760 #define BL_RP 0xe8400002 /* b,l,n XXX,%rp */
761 #define NOP 0x08000240 /* nop */
762 #define LDW_RP 0x4bc23fd1 /* ldw -24(%sr0,%sp),%rp */
763 #define LDSID_RP_R1 0x004010a1 /* ldsid (%sr0,%rp),%r1 */
764 #define BE_SR0_RP 0xe0400002 /* be,n 0(%sr0,%rp) */
766 #ifndef R19_STUBS
767 #define R19_STUBS 1
768 #endif
770 #if R19_STUBS
771 #define LDW_R1_DLT LDW_R1_R19
772 #else
773 #define LDW_R1_DLT LDW_R1_DP
774 #endif
776 static boolean
777 hppa_build_one_stub (gen_entry, in_arg)
778 struct bfd_hash_entry *gen_entry;
779 PTR in_arg;
781 struct elf32_hppa_stub_hash_entry *stub_entry;
782 struct bfd_link_info *info;
783 struct elf32_hppa_link_hash_table *htab;
784 asection *stub_sec;
785 bfd *stub_bfd;
786 bfd_byte *loc;
787 bfd_vma sym_value;
788 bfd_vma insn;
789 bfd_vma off;
790 int val;
791 int size;
793 /* Massage our args to the form they really have. */
794 stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
795 info = (struct bfd_link_info *) in_arg;
797 htab = hppa_link_hash_table (info);
798 stub_sec = stub_entry->stub_sec;
800 /* Make a note of the offset within the stubs for this entry. */
801 stub_entry->stub_offset = stub_sec->_raw_size;
802 loc = stub_sec->contents + stub_entry->stub_offset;
804 stub_bfd = stub_sec->owner;
806 switch (stub_entry->stub_type)
808 case hppa_stub_long_branch:
809 /* Create the long branch. A long branch is formed with "ldil"
810 loading the upper bits of the target address into a register,
811 then branching with "be" which adds in the lower bits.
812 The "be" has its delay slot nullified. */
813 sym_value = (stub_entry->target_value
814 + stub_entry->target_section->output_offset
815 + stub_entry->target_section->output_section->vma);
817 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel);
818 insn = hppa_rebuild_insn ((int) LDIL_R1, val, 21);
819 bfd_put_32 (stub_bfd, insn, loc);
821 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel) >> 2;
822 insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
823 bfd_put_32 (stub_bfd, insn, loc + 4);
825 size = 8;
826 break;
828 case hppa_stub_long_branch_shared:
829 /* Branches are relative. This is where we are going to. */
830 sym_value = (stub_entry->target_value
831 + stub_entry->target_section->output_offset
832 + stub_entry->target_section->output_section->vma);
834 /* And this is where we are coming from, more or less. */
835 sym_value -= (stub_entry->stub_offset
836 + stub_sec->output_offset
837 + stub_sec->output_section->vma);
839 bfd_put_32 (stub_bfd, (bfd_vma) BL_R1, loc);
840 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_lrsel);
841 insn = hppa_rebuild_insn ((int) ADDIL_R1, val, 21);
842 bfd_put_32 (stub_bfd, insn, loc + 4);
844 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_rrsel) >> 2;
845 insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
846 bfd_put_32 (stub_bfd, insn, loc + 8);
847 size = 12;
848 break;
850 case hppa_stub_import:
851 case hppa_stub_import_shared:
852 off = stub_entry->h->elf.plt.offset;
853 if (off >= (bfd_vma) -2)
854 abort ();
856 off &= ~ (bfd_vma) 1;
857 sym_value = (off
858 + htab->splt->output_offset
859 + htab->splt->output_section->vma
860 - elf_gp (htab->splt->output_section->owner));
862 insn = ADDIL_DP;
863 #if R19_STUBS
864 if (stub_entry->stub_type == hppa_stub_import_shared)
865 insn = ADDIL_R19;
866 #endif
867 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel),
868 insn = hppa_rebuild_insn ((int) insn, val, 21);
869 bfd_put_32 (stub_bfd, insn, loc);
871 /* It is critical to use lrsel/rrsel here because we are using
872 two different offsets (+0 and +4) from sym_value. If we use
873 lsel/rsel then with unfortunate sym_values we will round
874 sym_value+4 up to the next 2k block leading to a mis-match
875 between the lsel and rsel value. */
876 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel);
877 insn = hppa_rebuild_insn ((int) LDW_R1_R21, val, 14);
878 bfd_put_32 (stub_bfd, insn, loc + 4);
880 if (htab->multi_subspace)
882 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
883 insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
884 bfd_put_32 (stub_bfd, insn, loc + 8);
886 bfd_put_32 (stub_bfd, (bfd_vma) LDSID_R21_R1, loc + 12);
887 bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
888 bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_R21, loc + 20);
889 bfd_put_32 (stub_bfd, (bfd_vma) STW_RP, loc + 24);
891 size = 28;
893 else
895 bfd_put_32 (stub_bfd, (bfd_vma) BV_R0_R21, loc + 8);
896 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
897 insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
898 bfd_put_32 (stub_bfd, insn, loc + 12);
900 size = 16;
903 if (!info->shared
904 && stub_entry->h != NULL
905 && stub_entry->h->pic_call)
907 /* Build the .plt entry needed to call a PIC function from
908 statically linked code. We don't need any relocs. */
909 bfd *dynobj;
910 struct elf32_hppa_link_hash_entry *eh;
911 bfd_vma value;
913 dynobj = htab->elf.dynobj;
914 eh = (struct elf32_hppa_link_hash_entry *) stub_entry->h;
916 if (eh->elf.root.type != bfd_link_hash_defined
917 && eh->elf.root.type != bfd_link_hash_defweak)
918 abort ();
920 value = (eh->elf.root.u.def.value
921 + eh->elf.root.u.def.section->output_offset
922 + eh->elf.root.u.def.section->output_section->vma);
924 /* Fill in the entry in the procedure linkage table.
926 The format of a plt entry is
927 <funcaddr>
928 <__gp>. */
930 bfd_put_32 (htab->splt->owner, value,
931 htab->splt->contents + off);
932 value = elf_gp (htab->splt->output_section->owner);
933 bfd_put_32 (htab->splt->owner, value,
934 htab->splt->contents + off + 4);
936 break;
938 case hppa_stub_export:
939 /* Branches are relative. This is where we are going to. */
940 sym_value = (stub_entry->target_value
941 + stub_entry->target_section->output_offset
942 + stub_entry->target_section->output_section->vma);
944 /* And this is where we are coming from. */
945 sym_value -= (stub_entry->stub_offset
946 + stub_sec->output_offset
947 + stub_sec->output_section->vma);
949 if (sym_value - 8 + (1 << (17 + 1)) >= (1 << (17 + 2))
950 && (!htab->has_22bit_branch
951 || sym_value - 8 + (1 << (22 + 1)) >= (1 << (22 + 2))))
953 (*_bfd_error_handler)
954 (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
955 bfd_archive_filename (stub_entry->target_section->owner),
956 stub_sec->name,
957 (long) stub_entry->stub_offset,
958 stub_entry->root.string);
959 bfd_set_error (bfd_error_bad_value);
960 return false;
963 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_fsel) >> 2;
964 if (!htab->has_22bit_branch)
965 insn = hppa_rebuild_insn ((int) BL_RP, val, 17);
966 else
967 insn = hppa_rebuild_insn ((int) BL22_RP, val, 22);
968 bfd_put_32 (stub_bfd, insn, loc);
970 bfd_put_32 (stub_bfd, (bfd_vma) NOP, loc + 4);
971 bfd_put_32 (stub_bfd, (bfd_vma) LDW_RP, loc + 8);
972 bfd_put_32 (stub_bfd, (bfd_vma) LDSID_RP_R1, loc + 12);
973 bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
974 bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_RP, loc + 20);
976 /* Point the function symbol at the stub. */
977 stub_entry->h->elf.root.u.def.section = stub_sec;
978 stub_entry->h->elf.root.u.def.value = stub_sec->_raw_size;
980 size = 24;
981 break;
983 default:
984 BFD_FAIL ();
985 return false;
988 stub_sec->_raw_size += size;
989 return true;
992 #undef LDIL_R1
993 #undef BE_SR4_R1
994 #undef BL_R1
995 #undef ADDIL_R1
996 #undef DEPI_R1
997 #undef ADDIL_DP
998 #undef LDW_R1_R21
999 #undef LDW_R1_DLT
1000 #undef LDW_R1_R19
1001 #undef ADDIL_R19
1002 #undef LDW_R1_DP
1003 #undef LDSID_R21_R1
1004 #undef MTSP_R1
1005 #undef BE_SR0_R21
1006 #undef STW_RP
1007 #undef BV_R0_R21
1008 #undef BL_RP
1009 #undef NOP
1010 #undef LDW_RP
1011 #undef LDSID_RP_R1
1012 #undef BE_SR0_RP
1014 /* As above, but don't actually build the stub. Just bump offset so
1015 we know stub section sizes. */
1017 static boolean
1018 hppa_size_one_stub (gen_entry, in_arg)
1019 struct bfd_hash_entry *gen_entry;
1020 PTR in_arg;
1022 struct elf32_hppa_stub_hash_entry *stub_entry;
1023 struct elf32_hppa_link_hash_table *htab;
1024 int size;
1026 /* Massage our args to the form they really have. */
1027 stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
1028 htab = (struct elf32_hppa_link_hash_table *) in_arg;
1030 if (stub_entry->stub_type == hppa_stub_long_branch)
1031 size = 8;
1032 else if (stub_entry->stub_type == hppa_stub_long_branch_shared)
1033 size = 12;
1034 else if (stub_entry->stub_type == hppa_stub_export)
1035 size = 24;
1036 else /* hppa_stub_import or hppa_stub_import_shared. */
1038 if (htab->multi_subspace)
1039 size = 28;
1040 else
1041 size = 16;
1044 stub_entry->stub_sec->_raw_size += size;
1045 return true;
1048 /* Return nonzero if ABFD represents an HPPA ELF32 file.
1049 Additionally we set the default architecture and machine. */
1051 static boolean
1052 elf32_hppa_object_p (abfd)
1053 bfd *abfd;
1055 Elf_Internal_Ehdr * i_ehdrp;
1056 unsigned int flags;
1058 i_ehdrp = elf_elfheader (abfd);
1059 if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0)
1061 if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_LINUX)
1062 return false;
1064 else
1066 if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX)
1067 return false;
1070 flags = i_ehdrp->e_flags;
1071 switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE))
1073 case EFA_PARISC_1_0:
1074 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10);
1075 case EFA_PARISC_1_1:
1076 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11);
1077 case EFA_PARISC_2_0:
1078 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20);
1079 case EFA_PARISC_2_0 | EF_PARISC_WIDE:
1080 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25);
1082 return true;
1085 /* Undo the generic ELF code's subtraction of section->vma from the
1086 value of each external symbol. */
1088 static boolean
1089 elf32_hppa_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
1090 bfd *abfd ATTRIBUTE_UNUSED;
1091 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1092 const Elf_Internal_Sym *sym ATTRIBUTE_UNUSED;
1093 const char **namep ATTRIBUTE_UNUSED;
1094 flagword *flagsp ATTRIBUTE_UNUSED;
1095 asection **secp;
1096 bfd_vma *valp;
1098 *valp += (*secp)->vma;
1099 return true;
1102 /* Create the .plt and .got sections, and set up our hash table
1103 short-cuts to various dynamic sections. */
1105 static boolean
1106 elf32_hppa_create_dynamic_sections (abfd, info)
1107 bfd *abfd;
1108 struct bfd_link_info *info;
1110 struct elf32_hppa_link_hash_table *htab;
1112 /* Don't try to create the .plt and .got twice. */
1113 htab = hppa_link_hash_table (info);
1114 if (htab->splt != NULL)
1115 return true;
1117 /* Call the generic code to do most of the work. */
1118 if (! _bfd_elf_create_dynamic_sections (abfd, info))
1119 return false;
1121 htab->splt = bfd_get_section_by_name (abfd, ".plt");
1122 htab->srelplt = bfd_get_section_by_name (abfd, ".rela.plt");
1124 htab->sgot = bfd_get_section_by_name (abfd, ".got");
1125 htab->srelgot = bfd_make_section (abfd, ".rela.got");
1126 if (htab->srelgot == NULL
1127 || ! bfd_set_section_flags (abfd, htab->srelgot,
1128 (SEC_ALLOC
1129 | SEC_LOAD
1130 | SEC_HAS_CONTENTS
1131 | SEC_IN_MEMORY
1132 | SEC_LINKER_CREATED
1133 | SEC_READONLY))
1134 || ! bfd_set_section_alignment (abfd, htab->srelgot, 2))
1135 return false;
1137 htab->sdynbss = bfd_get_section_by_name (abfd, ".dynbss");
1138 htab->srelbss = bfd_get_section_by_name (abfd, ".rela.bss");
1140 return true;
1143 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1145 static void
1146 elf32_hppa_copy_indirect_symbol (dir, ind)
1147 struct elf_link_hash_entry *dir, *ind;
1149 struct elf32_hppa_link_hash_entry *edir, *eind;
1151 edir = (struct elf32_hppa_link_hash_entry *) dir;
1152 eind = (struct elf32_hppa_link_hash_entry *) ind;
1154 if (eind->dyn_relocs != NULL)
1156 if (edir->dyn_relocs != NULL)
1158 struct elf32_hppa_dyn_reloc_entry **pp;
1159 struct elf32_hppa_dyn_reloc_entry *p;
1161 if (ind->root.type == bfd_link_hash_indirect)
1162 abort ();
1164 /* Add reloc counts against the weak sym to the strong sym
1165 list. Merge any entries against the same section. */
1166 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1168 struct elf32_hppa_dyn_reloc_entry *q;
1170 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1171 if (q->sec == p->sec)
1173 #if RELATIVE_DYNRELOCS
1174 q->relative_count += p->relative_count;
1175 #endif
1176 q->count += p->count;
1177 *pp = p->next;
1178 break;
1180 if (q == NULL)
1181 pp = &p->next;
1183 *pp = edir->dyn_relocs;
1186 edir->dyn_relocs = eind->dyn_relocs;
1187 eind->dyn_relocs = NULL;
1190 _bfd_elf_link_hash_copy_indirect (dir, ind);
1193 /* Look through the relocs for a section during the first phase, and
1194 calculate needed space in the global offset table, procedure linkage
1195 table, and dynamic reloc sections. At this point we haven't
1196 necessarily read all the input files. */
1198 static boolean
1199 elf32_hppa_check_relocs (abfd, info, sec, relocs)
1200 bfd *abfd;
1201 struct bfd_link_info *info;
1202 asection *sec;
1203 const Elf_Internal_Rela *relocs;
1205 Elf_Internal_Shdr *symtab_hdr;
1206 struct elf_link_hash_entry **sym_hashes;
1207 const Elf_Internal_Rela *rel;
1208 const Elf_Internal_Rela *rel_end;
1209 struct elf32_hppa_link_hash_table *htab;
1210 asection *sreloc;
1211 asection *stubreloc;
1213 if (info->relocateable)
1214 return true;
1216 htab = hppa_link_hash_table (info);
1217 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1218 sym_hashes = elf_sym_hashes (abfd);
1219 sreloc = NULL;
1220 stubreloc = NULL;
1222 rel_end = relocs + sec->reloc_count;
1223 for (rel = relocs; rel < rel_end; rel++)
1225 enum {
1226 NEED_GOT = 1,
1227 NEED_PLT = 2,
1228 NEED_DYNREL = 4,
1229 PLT_PLABEL = 8
1232 unsigned int r_symndx, r_type;
1233 struct elf32_hppa_link_hash_entry *h;
1234 int need_entry;
1236 r_symndx = ELF32_R_SYM (rel->r_info);
1238 if (r_symndx < symtab_hdr->sh_info)
1239 h = NULL;
1240 else
1241 h = ((struct elf32_hppa_link_hash_entry *)
1242 sym_hashes[r_symndx - symtab_hdr->sh_info]);
1244 r_type = ELF32_R_TYPE (rel->r_info);
1246 switch (r_type)
1248 case R_PARISC_DLTIND14F:
1249 case R_PARISC_DLTIND14R:
1250 case R_PARISC_DLTIND21L:
1251 /* This symbol requires a global offset table entry. */
1252 need_entry = NEED_GOT;
1254 /* Mark this section as containing PIC code. */
1255 sec->flags |= SEC_HAS_GOT_REF;
1256 break;
1258 case R_PARISC_PLABEL14R: /* "Official" procedure labels. */
1259 case R_PARISC_PLABEL21L:
1260 case R_PARISC_PLABEL32:
1261 /* If the addend is non-zero, we break badly. */
1262 if (rel->r_addend != 0)
1263 abort ();
1265 /* If we are creating a shared library, then we need to
1266 create a PLT entry for all PLABELs, because PLABELs with
1267 local symbols may be passed via a pointer to another
1268 object. Additionally, output a dynamic relocation
1269 pointing to the PLT entry.
1270 For executables, the original 32-bit ABI allowed two
1271 different styles of PLABELs (function pointers): For
1272 global functions, the PLABEL word points into the .plt
1273 two bytes past a (function address, gp) pair, and for
1274 local functions the PLABEL points directly at the
1275 function. The magic +2 for the first type allows us to
1276 differentiate between the two. As you can imagine, this
1277 is a real pain when it comes to generating code to call
1278 functions indirectly or to compare function pointers.
1279 We avoid the mess by always pointing a PLABEL into the
1280 .plt, even for local functions. */
1281 need_entry = PLT_PLABEL | NEED_PLT | NEED_DYNREL;
1282 break;
1284 case R_PARISC_PCREL12F:
1285 htab->has_12bit_branch = 1;
1286 goto branch_common;
1288 case R_PARISC_PCREL17C:
1289 case R_PARISC_PCREL17F:
1290 htab->has_17bit_branch = 1;
1291 goto branch_common;
1293 case R_PARISC_PCREL22F:
1294 htab->has_22bit_branch = 1;
1295 branch_common:
1296 /* Function calls might need to go through the .plt, and
1297 might require long branch stubs. */
1298 if (h == NULL)
1300 /* We know local syms won't need a .plt entry, and if
1301 they need a long branch stub we can't guarantee that
1302 we can reach the stub. So just flag an error later
1303 if we're doing a shared link and find we need a long
1304 branch stub. */
1305 continue;
1307 else
1309 /* Global symbols will need a .plt entry if they remain
1310 global, and in most cases won't need a long branch
1311 stub. Unfortunately, we have to cater for the case
1312 where a symbol is forced local by versioning, or due
1313 to symbolic linking, and we lose the .plt entry. */
1314 need_entry = NEED_PLT;
1315 if (h->elf.type == STT_PARISC_MILLI)
1316 need_entry = 0;
1318 break;
1320 case R_PARISC_SEGBASE: /* Used to set segment base. */
1321 case R_PARISC_SEGREL32: /* Relative reloc, used for unwind. */
1322 case R_PARISC_PCREL14F: /* PC relative load/store. */
1323 case R_PARISC_PCREL14R:
1324 case R_PARISC_PCREL17R: /* External branches. */
1325 case R_PARISC_PCREL21L: /* As above, and for load/store too. */
1326 /* We don't need to propagate the relocation if linking a
1327 shared object since these are section relative. */
1328 continue;
1330 case R_PARISC_DPREL14F: /* Used for gp rel data load/store. */
1331 case R_PARISC_DPREL14R:
1332 case R_PARISC_DPREL21L:
1333 if (info->shared)
1335 (*_bfd_error_handler)
1336 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
1337 bfd_archive_filename (abfd),
1338 elf_hppa_howto_table[r_type].name);
1339 bfd_set_error (bfd_error_bad_value);
1340 return false;
1342 /* Fall through. */
1344 case R_PARISC_DIR17F: /* Used for external branches. */
1345 case R_PARISC_DIR17R:
1346 case R_PARISC_DIR14F: /* Used for load/store from absolute locn. */
1347 case R_PARISC_DIR14R:
1348 case R_PARISC_DIR21L: /* As above, and for ext branches too. */
1349 #if 0
1350 /* Help debug shared library creation. Any of the above
1351 relocs can be used in shared libs, but they may cause
1352 pages to become unshared. */
1353 if (info->shared)
1355 (*_bfd_error_handler)
1356 (_("%s: relocation %s should not be used when making a shared object; recompile with -fPIC"),
1357 bfd_archive_filename (abfd),
1358 elf_hppa_howto_table[r_type].name);
1360 /* Fall through. */
1361 #endif
1363 case R_PARISC_DIR32: /* .word relocs. */
1364 /* We may want to output a dynamic relocation later. */
1365 need_entry = NEED_DYNREL;
1366 break;
1368 /* This relocation describes the C++ object vtable hierarchy.
1369 Reconstruct it for later use during GC. */
1370 case R_PARISC_GNU_VTINHERIT:
1371 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec,
1372 &h->elf, rel->r_offset))
1373 return false;
1374 continue;
1376 /* This relocation describes which C++ vtable entries are actually
1377 used. Record for later use during GC. */
1378 case R_PARISC_GNU_VTENTRY:
1379 if (!_bfd_elf32_gc_record_vtentry (abfd, sec,
1380 &h->elf, rel->r_addend))
1381 return false;
1382 continue;
1384 default:
1385 continue;
1388 /* Now carry out our orders. */
1389 if (need_entry & NEED_GOT)
1391 /* Allocate space for a GOT entry, as well as a dynamic
1392 relocation for this entry. */
1393 if (htab->sgot == NULL)
1395 if (htab->elf.dynobj == NULL)
1396 htab->elf.dynobj = abfd;
1397 if (!elf32_hppa_create_dynamic_sections (htab->elf.dynobj, info))
1398 return false;
1401 if (h != NULL)
1403 h->elf.got.refcount += 1;
1405 else
1407 bfd_signed_vma *local_got_refcounts;
1409 /* This is a global offset table entry for a local symbol. */
1410 local_got_refcounts = elf_local_got_refcounts (abfd);
1411 if (local_got_refcounts == NULL)
1413 bfd_size_type size;
1415 /* Allocate space for local got offsets and local
1416 plt offsets. Done this way to save polluting
1417 elf_obj_tdata with another target specific
1418 pointer. */
1419 size = symtab_hdr->sh_info;
1420 size *= 2 * sizeof (bfd_signed_vma);
1421 local_got_refcounts = ((bfd_signed_vma *)
1422 bfd_zalloc (abfd, size));
1423 if (local_got_refcounts == NULL)
1424 return false;
1425 elf_local_got_refcounts (abfd) = local_got_refcounts;
1427 local_got_refcounts[r_symndx] += 1;
1431 if (need_entry & NEED_PLT)
1433 /* If we are creating a shared library, and this is a reloc
1434 against a weak symbol or a global symbol in a dynamic
1435 object, then we will be creating an import stub and a
1436 .plt entry for the symbol. Similarly, on a normal link
1437 to symbols defined in a dynamic object we'll need the
1438 import stub and a .plt entry. We don't know yet whether
1439 the symbol is defined or not, so make an entry anyway and
1440 clean up later in adjust_dynamic_symbol. */
1441 if ((sec->flags & SEC_ALLOC) != 0)
1443 if (h != NULL)
1445 h->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1446 h->elf.plt.refcount += 1;
1448 /* If this .plt entry is for a plabel, mark it so
1449 that adjust_dynamic_symbol will keep the entry
1450 even if it appears to be local. */
1451 if (need_entry & PLT_PLABEL)
1452 h->plabel = 1;
1454 else if (need_entry & PLT_PLABEL)
1456 bfd_signed_vma *local_got_refcounts;
1457 bfd_signed_vma *local_plt_refcounts;
1459 local_got_refcounts = elf_local_got_refcounts (abfd);
1460 if (local_got_refcounts == NULL)
1462 bfd_size_type size;
1464 /* Allocate space for local got offsets and local
1465 plt offsets. */
1466 size = symtab_hdr->sh_info;
1467 size *= 2 * sizeof (bfd_signed_vma);
1468 local_got_refcounts = ((bfd_signed_vma *)
1469 bfd_zalloc (abfd, size));
1470 if (local_got_refcounts == NULL)
1471 return false;
1472 elf_local_got_refcounts (abfd) = local_got_refcounts;
1474 local_plt_refcounts = (local_got_refcounts
1475 + symtab_hdr->sh_info);
1476 local_plt_refcounts[r_symndx] += 1;
1481 if (need_entry & NEED_DYNREL)
1483 /* Flag this symbol as having a non-got, non-plt reference
1484 so that we generate copy relocs if it turns out to be
1485 dynamic. */
1486 if (h != NULL && !info->shared)
1487 h->elf.elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
1489 /* If we are creating a shared library then we need to copy
1490 the reloc into the shared library. However, if we are
1491 linking with -Bsymbolic, we need only copy absolute
1492 relocs or relocs against symbols that are not defined in
1493 an object we are including in the link. PC- or DP- or
1494 DLT-relative relocs against any local sym or global sym
1495 with DEF_REGULAR set, can be discarded. At this point we
1496 have not seen all the input files, so it is possible that
1497 DEF_REGULAR is not set now but will be set later (it is
1498 never cleared). We account for that possibility below by
1499 storing information in the dyn_relocs field of the
1500 hash table entry.
1502 A similar situation to the -Bsymbolic case occurs when
1503 creating shared libraries and symbol visibility changes
1504 render the symbol local.
1506 As it turns out, all the relocs we will be creating here
1507 are absolute, so we cannot remove them on -Bsymbolic
1508 links or visibility changes anyway. A STUB_REL reloc
1509 is absolute too, as in that case it is the reloc in the
1510 stub we will be creating, rather than copying the PCREL
1511 reloc in the branch.
1513 If on the other hand, we are creating an executable, we
1514 may need to keep relocations for symbols satisfied by a
1515 dynamic library if we manage to avoid copy relocs for the
1516 symbol. */
1517 if ((info->shared
1518 && (sec->flags & SEC_ALLOC) != 0
1519 && (IS_ABSOLUTE_RELOC (r_type)
1520 || (h != NULL
1521 && (!info->symbolic
1522 || h->elf.root.type == bfd_link_hash_defweak
1523 || (h->elf.elf_link_hash_flags
1524 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1525 || (!info->shared
1526 && (sec->flags & SEC_ALLOC) != 0
1527 && h != NULL
1528 && (h->elf.root.type == bfd_link_hash_defweak
1529 || (h->elf.elf_link_hash_flags
1530 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1532 struct elf32_hppa_dyn_reloc_entry *p;
1533 struct elf32_hppa_dyn_reloc_entry **head;
1535 /* Create a reloc section in dynobj and make room for
1536 this reloc. */
1537 if (sreloc == NULL)
1539 char *name;
1540 bfd *dynobj;
1542 name = (bfd_elf_string_from_elf_section
1543 (abfd,
1544 elf_elfheader (abfd)->e_shstrndx,
1545 elf_section_data (sec)->rel_hdr.sh_name));
1546 if (name == NULL)
1548 (*_bfd_error_handler)
1549 (_("Could not find relocation section for %s"),
1550 sec->name);
1551 bfd_set_error (bfd_error_bad_value);
1552 return false;
1555 if (htab->elf.dynobj == NULL)
1556 htab->elf.dynobj = abfd;
1558 dynobj = htab->elf.dynobj;
1559 sreloc = bfd_get_section_by_name (dynobj, name);
1560 if (sreloc == NULL)
1562 flagword flags;
1564 sreloc = bfd_make_section (dynobj, name);
1565 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1566 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1567 if ((sec->flags & SEC_ALLOC) != 0)
1568 flags |= SEC_ALLOC | SEC_LOAD;
1569 if (sreloc == NULL
1570 || !bfd_set_section_flags (dynobj, sreloc, flags)
1571 || !bfd_set_section_alignment (dynobj, sreloc, 2))
1572 return false;
1575 elf_section_data (sec)->sreloc = sreloc;
1578 /* If this is a global symbol, we count the number of
1579 relocations we need for this symbol. */
1580 if (h != NULL)
1582 head = &h->dyn_relocs;
1584 else
1586 /* Track dynamic relocs needed for local syms too.
1587 We really need local syms available to do this
1588 easily. Oh well. */
1590 asection *s;
1591 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1592 sec, r_symndx);
1593 if (s == NULL)
1594 return false;
1596 head = ((struct elf32_hppa_dyn_reloc_entry **)
1597 &elf_section_data (s)->local_dynrel);
1600 p = *head;
1601 if (p == NULL || p->sec != sec)
1603 p = ((struct elf32_hppa_dyn_reloc_entry *)
1604 bfd_alloc (htab->elf.dynobj,
1605 (bfd_size_type) sizeof *p));
1606 if (p == NULL)
1607 return false;
1608 p->next = *head;
1609 *head = p;
1610 p->sec = sec;
1611 p->count = 0;
1612 #if RELATIVE_DYNRELOCS
1613 p->relative_count = 0;
1614 #endif
1617 p->count += 1;
1618 #if RELATIVE_DYNRELOCS
1619 if (!IS_ABSOLUTE_RELOC (rtype))
1620 p->relative_count += 1;
1621 #endif
1626 return true;
1629 /* Return the section that should be marked against garbage collection
1630 for a given relocation. */
1632 static asection *
1633 elf32_hppa_gc_mark_hook (abfd, info, rel, h, sym)
1634 bfd *abfd;
1635 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1636 Elf_Internal_Rela *rel;
1637 struct elf_link_hash_entry *h;
1638 Elf_Internal_Sym *sym;
1640 if (h != NULL)
1642 switch ((unsigned int) ELF32_R_TYPE (rel->r_info))
1644 case R_PARISC_GNU_VTINHERIT:
1645 case R_PARISC_GNU_VTENTRY:
1646 break;
1648 default:
1649 switch (h->root.type)
1651 case bfd_link_hash_defined:
1652 case bfd_link_hash_defweak:
1653 return h->root.u.def.section;
1655 case bfd_link_hash_common:
1656 return h->root.u.c.p->section;
1658 default:
1659 break;
1663 else
1665 return bfd_section_from_elf_index (abfd, sym->st_shndx);
1668 return NULL;
1671 /* Update the got and plt entry reference counts for the section being
1672 removed. */
1674 static boolean
1675 elf32_hppa_gc_sweep_hook (abfd, info, sec, relocs)
1676 bfd *abfd;
1677 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1678 asection *sec;
1679 const Elf_Internal_Rela *relocs;
1681 Elf_Internal_Shdr *symtab_hdr;
1682 struct elf_link_hash_entry **sym_hashes;
1683 bfd_signed_vma *local_got_refcounts;
1684 bfd_signed_vma *local_plt_refcounts;
1685 const Elf_Internal_Rela *rel, *relend;
1686 unsigned long r_symndx;
1687 struct elf_link_hash_entry *h;
1688 struct elf32_hppa_link_hash_table *htab;
1689 bfd *dynobj;
1691 elf_section_data (sec)->local_dynrel = NULL;
1693 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1694 sym_hashes = elf_sym_hashes (abfd);
1695 local_got_refcounts = elf_local_got_refcounts (abfd);
1696 local_plt_refcounts = local_got_refcounts;
1697 if (local_plt_refcounts != NULL)
1698 local_plt_refcounts += symtab_hdr->sh_info;
1699 htab = hppa_link_hash_table (info);
1700 dynobj = htab->elf.dynobj;
1701 if (dynobj == NULL)
1702 return true;
1704 relend = relocs + sec->reloc_count;
1705 for (rel = relocs; rel < relend; rel++)
1706 switch ((unsigned int) ELF32_R_TYPE (rel->r_info))
1708 case R_PARISC_DLTIND14F:
1709 case R_PARISC_DLTIND14R:
1710 case R_PARISC_DLTIND21L:
1711 r_symndx = ELF32_R_SYM (rel->r_info);
1712 if (r_symndx >= symtab_hdr->sh_info)
1714 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1715 if (h->got.refcount > 0)
1716 h->got.refcount -= 1;
1718 else if (local_got_refcounts != NULL)
1720 if (local_got_refcounts[r_symndx] > 0)
1721 local_got_refcounts[r_symndx] -= 1;
1723 break;
1725 case R_PARISC_PCREL12F:
1726 case R_PARISC_PCREL17C:
1727 case R_PARISC_PCREL17F:
1728 case R_PARISC_PCREL22F:
1729 r_symndx = ELF32_R_SYM (rel->r_info);
1730 if (r_symndx >= symtab_hdr->sh_info)
1732 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1733 if (h->plt.refcount > 0)
1734 h->plt.refcount -= 1;
1736 break;
1738 case R_PARISC_PLABEL14R:
1739 case R_PARISC_PLABEL21L:
1740 case R_PARISC_PLABEL32:
1741 r_symndx = ELF32_R_SYM (rel->r_info);
1742 if (r_symndx >= symtab_hdr->sh_info)
1744 struct elf32_hppa_link_hash_entry *eh;
1745 struct elf32_hppa_dyn_reloc_entry **pp;
1746 struct elf32_hppa_dyn_reloc_entry *p;
1748 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1750 if (h->plt.refcount > 0)
1751 h->plt.refcount -= 1;
1753 eh = (struct elf32_hppa_link_hash_entry *) h;
1755 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1756 if (p->sec == sec)
1758 #if RELATIVE_DYNRELOCS
1759 if (!IS_ABSOLUTE_RELOC (rtype))
1760 p->relative_count -= 1;
1761 #endif
1762 p->count -= 1;
1763 if (p->count == 0)
1764 *pp = p->next;
1765 break;
1768 else if (local_plt_refcounts != NULL)
1770 if (local_plt_refcounts[r_symndx] > 0)
1771 local_plt_refcounts[r_symndx] -= 1;
1773 break;
1775 case R_PARISC_DIR32:
1776 r_symndx = ELF32_R_SYM (rel->r_info);
1777 if (r_symndx >= symtab_hdr->sh_info)
1779 struct elf32_hppa_link_hash_entry *eh;
1780 struct elf32_hppa_dyn_reloc_entry **pp;
1781 struct elf32_hppa_dyn_reloc_entry *p;
1783 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1785 eh = (struct elf32_hppa_link_hash_entry *) h;
1787 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1788 if (p->sec == sec)
1790 #if RELATIVE_DYNRELOCS
1791 if (!IS_ABSOLUTE_RELOC (R_PARISC_DIR32))
1792 p->relative_count -= 1;
1793 #endif
1794 p->count -= 1;
1795 if (p->count == 0)
1796 *pp = p->next;
1797 break;
1800 break;
1802 default:
1803 break;
1806 return true;
1809 /* Our own version of hide_symbol, so that we can keep plt entries for
1810 plabels. */
1812 static void
1813 elf32_hppa_hide_symbol (info, h, force_local)
1814 struct bfd_link_info *info;
1815 struct elf_link_hash_entry *h;
1816 boolean force_local;
1818 if (force_local)
1820 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
1821 if (h->dynindx != -1)
1823 h->dynindx = -1;
1824 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
1825 h->dynstr_index);
1829 if (! ((struct elf32_hppa_link_hash_entry *) h)->plabel)
1831 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1832 h->plt.offset = (bfd_vma) -1;
1836 /* This is the condition under which elf32_hppa_finish_dynamic_symbol
1837 will be called from elflink.h. If elflink.h doesn't call our
1838 finish_dynamic_symbol routine, we'll need to do something about
1839 initializing any .plt and .got entries in elf32_hppa_relocate_section. */
1840 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1841 ((DYN) \
1842 && ((INFO)->shared \
1843 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1844 && ((H)->dynindx != -1 \
1845 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1847 /* Adjust a symbol defined by a dynamic object and referenced by a
1848 regular object. The current definition is in some section of the
1849 dynamic object, but we're not including those sections. We have to
1850 change the definition to something the rest of the link can
1851 understand. */
1853 static boolean
1854 elf32_hppa_adjust_dynamic_symbol (info, h)
1855 struct bfd_link_info *info;
1856 struct elf_link_hash_entry *h;
1858 struct elf32_hppa_link_hash_table *htab;
1859 struct elf32_hppa_link_hash_entry *eh;
1860 struct elf32_hppa_dyn_reloc_entry *p;
1861 asection *s;
1862 unsigned int power_of_two;
1864 /* If this is a function, put it in the procedure linkage table. We
1865 will fill in the contents of the procedure linkage table later. */
1866 if (h->type == STT_FUNC
1867 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1869 if (h->plt.refcount <= 0
1870 || ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1871 && h->root.type != bfd_link_hash_defweak
1872 && ! ((struct elf32_hppa_link_hash_entry *) h)->plabel
1873 && (!info->shared || info->symbolic)))
1875 /* The .plt entry is not needed when:
1876 a) Garbage collection has removed all references to the
1877 symbol, or
1878 b) We know for certain the symbol is defined in this
1879 object, and it's not a weak definition, nor is the symbol
1880 used by a plabel relocation. Either this object is the
1881 application or we are doing a shared symbolic link. */
1883 /* As a special sop to the hppa ABI, we keep a .plt entry
1884 for functions in sections containing PIC code. */
1885 if (!info->shared
1886 && h->plt.refcount > 0
1887 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1888 && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0)
1889 ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1;
1890 else
1892 h->plt.offset = (bfd_vma) -1;
1893 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1897 return true;
1899 else
1900 h->plt.offset = (bfd_vma) -1;
1902 /* If this is a weak symbol, and there is a real definition, the
1903 processor independent code will have arranged for us to see the
1904 real definition first, and we can just use the same value. */
1905 if (h->weakdef != NULL)
1907 if (h->weakdef->root.type != bfd_link_hash_defined
1908 && h->weakdef->root.type != bfd_link_hash_defweak)
1909 abort ();
1910 h->root.u.def.section = h->weakdef->root.u.def.section;
1911 h->root.u.def.value = h->weakdef->root.u.def.value;
1912 return true;
1915 /* This is a reference to a symbol defined by a dynamic object which
1916 is not a function. */
1918 /* If we are creating a shared library, we must presume that the
1919 only references to the symbol are via the global offset table.
1920 For such cases we need not do anything here; the relocations will
1921 be handled correctly by relocate_section. */
1922 if (info->shared)
1923 return true;
1925 /* If there are no references to this symbol that do not use the
1926 GOT, we don't need to generate a copy reloc. */
1927 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1928 return true;
1930 eh = (struct elf32_hppa_link_hash_entry *) h;
1931 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1933 s = p->sec->output_section;
1934 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1935 break;
1938 /* If we didn't find any dynamic relocs in read-only sections, then
1939 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1940 if (p == NULL)
1942 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1943 return true;
1946 /* We must allocate the symbol in our .dynbss section, which will
1947 become part of the .bss section of the executable. There will be
1948 an entry for this symbol in the .dynsym section. The dynamic
1949 object will contain position independent code, so all references
1950 from the dynamic object to this symbol will go through the global
1951 offset table. The dynamic linker will use the .dynsym entry to
1952 determine the address it must put in the global offset table, so
1953 both the dynamic object and the regular object will refer to the
1954 same memory location for the variable. */
1956 htab = hppa_link_hash_table (info);
1958 /* We must generate a COPY reloc to tell the dynamic linker to
1959 copy the initial value out of the dynamic object and into the
1960 runtime process image. */
1961 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1963 htab->srelbss->_raw_size += sizeof (Elf32_External_Rela);
1964 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1967 /* We need to figure out the alignment required for this symbol. I
1968 have no idea how other ELF linkers handle this. */
1970 power_of_two = bfd_log2 (h->size);
1971 if (power_of_two > 3)
1972 power_of_two = 3;
1974 /* Apply the required alignment. */
1975 s = htab->sdynbss;
1976 s->_raw_size = BFD_ALIGN (s->_raw_size,
1977 (bfd_size_type) (1 << power_of_two));
1978 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1980 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1981 return false;
1984 /* Define the symbol as being at this point in the section. */
1985 h->root.u.def.section = s;
1986 h->root.u.def.value = s->_raw_size;
1988 /* Increment the section size to make room for the symbol. */
1989 s->_raw_size += h->size;
1991 return true;
1994 /* Called via elf_link_hash_traverse to create .plt entries for an
1995 application that uses statically linked PIC functions. Similar to
1996 the first part of elf32_hppa_adjust_dynamic_symbol. */
1998 static boolean
1999 mark_PIC_calls (h, inf)
2000 struct elf_link_hash_entry *h;
2001 PTR inf ATTRIBUTE_UNUSED;
2003 if (h->root.type == bfd_link_hash_warning)
2004 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2006 if (! (h->plt.refcount > 0
2007 && (h->root.type == bfd_link_hash_defined
2008 || h->root.type == bfd_link_hash_defweak)
2009 && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0))
2011 h->plt.offset = (bfd_vma) -1;
2012 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2013 return true;
2016 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2017 ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1;
2019 return true;
2022 /* Allocate space in the .plt for entries that won't have relocations.
2023 ie. pic_call and plabel entries. */
2025 static boolean
2026 allocate_plt_static (h, inf)
2027 struct elf_link_hash_entry *h;
2028 PTR inf;
2030 struct bfd_link_info *info;
2031 struct elf32_hppa_link_hash_table *htab;
2032 asection *s;
2034 if (h->root.type == bfd_link_hash_indirect)
2035 return true;
2037 if (h->root.type == bfd_link_hash_warning)
2038 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2040 info = (struct bfd_link_info *) inf;
2041 htab = hppa_link_hash_table (info);
2042 if (((struct elf32_hppa_link_hash_entry *) h)->pic_call)
2044 /* Make an entry in the .plt section for non-pic code that is
2045 calling pic code. */
2046 ((struct elf32_hppa_link_hash_entry *) h)->plabel = 0;
2047 s = htab->splt;
2048 h->plt.offset = s->_raw_size;
2049 s->_raw_size += PLT_ENTRY_SIZE;
2051 else if (htab->elf.dynamic_sections_created
2052 && h->plt.refcount > 0)
2054 /* Make sure this symbol is output as a dynamic symbol.
2055 Undefined weak syms won't yet be marked as dynamic. */
2056 if (h->dynindx == -1
2057 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
2058 && h->type != STT_PARISC_MILLI)
2060 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2061 return false;
2064 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
2066 /* Allocate these later. From this point on, h->plabel
2067 means that the plt entry is only used by a plabel.
2068 We'll be using a normal plt entry for this symbol, so
2069 clear the plabel indicator. */
2070 ((struct elf32_hppa_link_hash_entry *) h)->plabel = 0;
2072 else if (((struct elf32_hppa_link_hash_entry *) h)->plabel)
2074 /* Make an entry in the .plt section for plabel references
2075 that won't have a .plt entry for other reasons. */
2076 s = htab->splt;
2077 h->plt.offset = s->_raw_size;
2078 s->_raw_size += PLT_ENTRY_SIZE;
2080 else
2082 /* No .plt entry needed. */
2083 h->plt.offset = (bfd_vma) -1;
2084 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2087 else
2089 h->plt.offset = (bfd_vma) -1;
2090 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2093 return true;
2096 /* Allocate space in .plt, .got and associated reloc sections for
2097 global syms. */
2099 static boolean
2100 allocate_dynrelocs (h, inf)
2101 struct elf_link_hash_entry *h;
2102 PTR inf;
2104 struct bfd_link_info *info;
2105 struct elf32_hppa_link_hash_table *htab;
2106 asection *s;
2107 struct elf32_hppa_link_hash_entry *eh;
2108 struct elf32_hppa_dyn_reloc_entry *p;
2110 if (h->root.type == bfd_link_hash_indirect)
2111 return true;
2113 if (h->root.type == bfd_link_hash_warning)
2114 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2116 info = (struct bfd_link_info *) inf;
2117 htab = hppa_link_hash_table (info);
2118 if (htab->elf.dynamic_sections_created
2119 && h->plt.offset != (bfd_vma) -1
2120 && !((struct elf32_hppa_link_hash_entry *) h)->pic_call
2121 && !((struct elf32_hppa_link_hash_entry *) h)->plabel)
2123 /* Make an entry in the .plt section. */
2124 s = htab->splt;
2125 h->plt.offset = s->_raw_size;
2126 s->_raw_size += PLT_ENTRY_SIZE;
2128 /* We also need to make an entry in the .rela.plt section. */
2129 htab->srelplt->_raw_size += sizeof (Elf32_External_Rela);
2130 htab->need_plt_stub = 1;
2133 if (h->got.refcount > 0)
2135 /* Make sure this symbol is output as a dynamic symbol.
2136 Undefined weak syms won't yet be marked as dynamic. */
2137 if (h->dynindx == -1
2138 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
2139 && h->type != STT_PARISC_MILLI)
2141 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2142 return false;
2145 s = htab->sgot;
2146 h->got.offset = s->_raw_size;
2147 s->_raw_size += GOT_ENTRY_SIZE;
2148 if (htab->elf.dynamic_sections_created
2149 && (info->shared
2150 || (h->dynindx != -1
2151 && h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0))
2153 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
2156 else
2157 h->got.offset = (bfd_vma) -1;
2159 eh = (struct elf32_hppa_link_hash_entry *) h;
2160 if (eh->dyn_relocs == NULL)
2161 return true;
2163 /* If this is a -Bsymbolic shared link, then we need to discard all
2164 space allocated for dynamic pc-relative relocs against symbols
2165 defined in a regular object. For the normal shared case, discard
2166 space for relocs that have become local due to symbol visibility
2167 changes. */
2168 if (info->shared)
2170 #if RELATIVE_DYNRELOCS
2171 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
2172 && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
2173 || info->symbolic))
2175 struct elf32_hppa_dyn_reloc_entry **pp;
2177 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2179 p->count -= p->relative_count;
2180 p->relative_count = 0;
2181 if (p->count == 0)
2182 *pp = p->next;
2183 else
2184 pp = &p->next;
2187 #endif
2189 else
2191 /* For the non-shared case, discard space for relocs against
2192 symbols which turn out to need copy relocs or are not
2193 dynamic. */
2194 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2195 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2196 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2197 || (htab->elf.dynamic_sections_created
2198 && (h->root.type == bfd_link_hash_undefweak
2199 || h->root.type == bfd_link_hash_undefined))))
2201 /* Make sure this symbol is output as a dynamic symbol.
2202 Undefined weak syms won't yet be marked as dynamic. */
2203 if (h->dynindx == -1
2204 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
2205 && h->type != STT_PARISC_MILLI)
2207 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2208 return false;
2211 /* If that succeeded, we know we'll be keeping all the
2212 relocs. */
2213 if (h->dynindx != -1)
2214 goto keep;
2217 eh->dyn_relocs = NULL;
2218 return true;
2220 keep: ;
2223 /* Finally, allocate space. */
2224 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2226 asection *sreloc = elf_section_data (p->sec)->sreloc;
2227 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
2230 return true;
2233 /* This function is called via elf_link_hash_traverse to force
2234 millicode symbols local so they do not end up as globals in the
2235 dynamic symbol table. We ought to be able to do this in
2236 adjust_dynamic_symbol, but our adjust_dynamic_symbol is not called
2237 for all dynamic symbols. Arguably, this is a bug in
2238 elf_adjust_dynamic_symbol. */
2240 static boolean
2241 clobber_millicode_symbols (h, info)
2242 struct elf_link_hash_entry *h;
2243 struct bfd_link_info *info;
2245 if (h->root.type == bfd_link_hash_warning)
2246 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2248 if (h->type == STT_PARISC_MILLI
2249 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
2251 elf32_hppa_hide_symbol (info, h, true);
2253 return true;
2256 /* Find any dynamic relocs that apply to read-only sections. */
2258 static boolean
2259 readonly_dynrelocs (h, inf)
2260 struct elf_link_hash_entry *h;
2261 PTR inf;
2263 struct elf32_hppa_link_hash_entry *eh;
2264 struct elf32_hppa_dyn_reloc_entry *p;
2266 if (h->root.type == bfd_link_hash_warning)
2267 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2269 eh = (struct elf32_hppa_link_hash_entry *) h;
2270 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2272 asection *s = p->sec->output_section;
2274 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2276 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2278 info->flags |= DF_TEXTREL;
2280 /* Not an error, just cut short the traversal. */
2281 return false;
2284 return true;
2287 /* Set the sizes of the dynamic sections. */
2289 static boolean
2290 elf32_hppa_size_dynamic_sections (output_bfd, info)
2291 bfd *output_bfd ATTRIBUTE_UNUSED;
2292 struct bfd_link_info *info;
2294 struct elf32_hppa_link_hash_table *htab;
2295 bfd *dynobj;
2296 bfd *ibfd;
2297 asection *s;
2298 boolean relocs;
2300 htab = hppa_link_hash_table (info);
2301 dynobj = htab->elf.dynobj;
2302 if (dynobj == NULL)
2303 abort ();
2305 if (htab->elf.dynamic_sections_created)
2307 /* Set the contents of the .interp section to the interpreter. */
2308 if (! info->shared)
2310 s = bfd_get_section_by_name (dynobj, ".interp");
2311 if (s == NULL)
2312 abort ();
2313 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
2314 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2317 /* Force millicode symbols local. */
2318 elf_link_hash_traverse (&htab->elf,
2319 clobber_millicode_symbols,
2320 info);
2322 else
2324 /* Run through the function symbols, looking for any that are
2325 PIC, and mark them as needing .plt entries so that %r19 will
2326 be set up. */
2327 if (! info->shared)
2328 elf_link_hash_traverse (&htab->elf, mark_PIC_calls, (PTR) info);
2331 /* Set up .got and .plt offsets for local syms, and space for local
2332 dynamic relocs. */
2333 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2335 bfd_signed_vma *local_got;
2336 bfd_signed_vma *end_local_got;
2337 bfd_signed_vma *local_plt;
2338 bfd_signed_vma *end_local_plt;
2339 bfd_size_type locsymcount;
2340 Elf_Internal_Shdr *symtab_hdr;
2341 asection *srel;
2343 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2344 continue;
2346 for (s = ibfd->sections; s != NULL; s = s->next)
2348 struct elf32_hppa_dyn_reloc_entry *p;
2350 for (p = ((struct elf32_hppa_dyn_reloc_entry *)
2351 elf_section_data (s)->local_dynrel);
2352 p != NULL;
2353 p = p->next)
2355 if (!bfd_is_abs_section (p->sec)
2356 && bfd_is_abs_section (p->sec->output_section))
2358 /* Input section has been discarded, either because
2359 it is a copy of a linkonce section or due to
2360 linker script /DISCARD/, so we'll be discarding
2361 the relocs too. */
2363 else if (p->count != 0)
2365 srel = elf_section_data (p->sec)->sreloc;
2366 srel->_raw_size += p->count * sizeof (Elf32_External_Rela);
2367 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2368 info->flags |= DF_TEXTREL;
2373 local_got = elf_local_got_refcounts (ibfd);
2374 if (!local_got)
2375 continue;
2377 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2378 locsymcount = symtab_hdr->sh_info;
2379 end_local_got = local_got + locsymcount;
2380 s = htab->sgot;
2381 srel = htab->srelgot;
2382 for (; local_got < end_local_got; ++local_got)
2384 if (*local_got > 0)
2386 *local_got = s->_raw_size;
2387 s->_raw_size += GOT_ENTRY_SIZE;
2388 if (info->shared)
2389 srel->_raw_size += sizeof (Elf32_External_Rela);
2391 else
2392 *local_got = (bfd_vma) -1;
2395 local_plt = end_local_got;
2396 end_local_plt = local_plt + locsymcount;
2397 if (! htab->elf.dynamic_sections_created)
2399 /* Won't be used, but be safe. */
2400 for (; local_plt < end_local_plt; ++local_plt)
2401 *local_plt = (bfd_vma) -1;
2403 else
2405 s = htab->splt;
2406 srel = htab->srelplt;
2407 for (; local_plt < end_local_plt; ++local_plt)
2409 if (*local_plt > 0)
2411 *local_plt = s->_raw_size;
2412 s->_raw_size += PLT_ENTRY_SIZE;
2413 if (info->shared)
2414 srel->_raw_size += sizeof (Elf32_External_Rela);
2416 else
2417 *local_plt = (bfd_vma) -1;
2422 /* Do all the .plt entries without relocs first. The dynamic linker
2423 uses the last .plt reloc to find the end of the .plt (and hence
2424 the start of the .got) for lazy linking. */
2425 elf_link_hash_traverse (&htab->elf, allocate_plt_static, (PTR) info);
2427 /* Allocate global sym .plt and .got entries, and space for global
2428 sym dynamic relocs. */
2429 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2431 /* The check_relocs and adjust_dynamic_symbol entry points have
2432 determined the sizes of the various dynamic sections. Allocate
2433 memory for them. */
2434 relocs = false;
2435 for (s = dynobj->sections; s != NULL; s = s->next)
2437 if ((s->flags & SEC_LINKER_CREATED) == 0)
2438 continue;
2440 if (s == htab->splt)
2442 if (htab->need_plt_stub)
2444 /* Make space for the plt stub at the end of the .plt
2445 section. We want this stub right at the end, up
2446 against the .got section. */
2447 int gotalign = bfd_section_alignment (dynobj, htab->sgot);
2448 int pltalign = bfd_section_alignment (dynobj, s);
2449 bfd_size_type mask;
2451 if (gotalign > pltalign)
2452 bfd_set_section_alignment (dynobj, s, gotalign);
2453 mask = ((bfd_size_type) 1 << gotalign) - 1;
2454 s->_raw_size = (s->_raw_size + sizeof (plt_stub) + mask) & ~mask;
2457 else if (s == htab->sgot)
2459 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2461 if (s->_raw_size != 0)
2463 /* Remember whether there are any reloc sections other
2464 than .rela.plt. */
2465 if (s != htab->srelplt)
2466 relocs = true;
2468 /* We use the reloc_count field as a counter if we need
2469 to copy relocs into the output file. */
2470 s->reloc_count = 0;
2473 else
2475 /* It's not one of our sections, so don't allocate space. */
2476 continue;
2479 if (s->_raw_size == 0)
2481 /* If we don't need this section, strip it from the
2482 output file. This is mostly to handle .rela.bss and
2483 .rela.plt. We must create both sections in
2484 create_dynamic_sections, because they must be created
2485 before the linker maps input sections to output
2486 sections. The linker does that before
2487 adjust_dynamic_symbol is called, and it is that
2488 function which decides whether anything needs to go
2489 into these sections. */
2490 _bfd_strip_section_from_output (info, s);
2491 continue;
2494 /* Allocate memory for the section contents. Zero it, because
2495 we may not fill in all the reloc sections. */
2496 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2497 if (s->contents == NULL && s->_raw_size != 0)
2498 return false;
2501 if (htab->elf.dynamic_sections_created)
2503 /* Like IA-64 and HPPA64, always create a DT_PLTGOT. It
2504 actually has nothing to do with the PLT, it is how we
2505 communicate the LTP value of a load module to the dynamic
2506 linker. */
2507 #define add_dynamic_entry(TAG, VAL) \
2508 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
2510 if (!add_dynamic_entry (DT_PLTGOT, 0))
2511 return false;
2513 /* Add some entries to the .dynamic section. We fill in the
2514 values later, in elf32_hppa_finish_dynamic_sections, but we
2515 must add the entries now so that we get the correct size for
2516 the .dynamic section. The DT_DEBUG entry is filled in by the
2517 dynamic linker and used by the debugger. */
2518 if (!info->shared)
2520 if (!add_dynamic_entry (DT_DEBUG, 0))
2521 return false;
2524 if (htab->srelplt->_raw_size != 0)
2526 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2527 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2528 || !add_dynamic_entry (DT_JMPREL, 0))
2529 return false;
2532 if (relocs)
2534 if (!add_dynamic_entry (DT_RELA, 0)
2535 || !add_dynamic_entry (DT_RELASZ, 0)
2536 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2537 return false;
2539 /* If any dynamic relocs apply to a read-only section,
2540 then we need a DT_TEXTREL entry. */
2541 if ((info->flags & DF_TEXTREL) == 0)
2542 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2543 (PTR) info);
2545 if ((info->flags & DF_TEXTREL) != 0)
2547 if (!add_dynamic_entry (DT_TEXTREL, 0))
2548 return false;
2552 #undef add_dynamic_entry
2554 return true;
2557 /* External entry points for sizing and building linker stubs. */
2559 /* Set up various things so that we can make a list of input sections
2560 for each output section included in the link. Returns -1 on error,
2561 0 when no stubs will be needed, and 1 on success. */
2564 elf32_hppa_setup_section_lists (output_bfd, info)
2565 bfd *output_bfd;
2566 struct bfd_link_info *info;
2568 bfd *input_bfd;
2569 unsigned int bfd_count;
2570 int top_id, top_index;
2571 asection *section;
2572 asection **input_list, **list;
2573 bfd_size_type amt;
2574 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
2576 if (htab->elf.root.creator->flavour != bfd_target_elf_flavour)
2577 return 0;
2579 /* Count the number of input BFDs and find the top input section id. */
2580 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2581 input_bfd != NULL;
2582 input_bfd = input_bfd->link_next)
2584 bfd_count += 1;
2585 for (section = input_bfd->sections;
2586 section != NULL;
2587 section = section->next)
2589 if (top_id < section->id)
2590 top_id = section->id;
2593 htab->bfd_count = bfd_count;
2595 amt = sizeof (struct map_stub) * (top_id + 1);
2596 htab->stub_group = (struct map_stub *) bfd_zmalloc (amt);
2597 if (htab->stub_group == NULL)
2598 return -1;
2600 /* We can't use output_bfd->section_count here to find the top output
2601 section index as some sections may have been removed, and
2602 _bfd_strip_section_from_output doesn't renumber the indices. */
2603 for (section = output_bfd->sections, top_index = 0;
2604 section != NULL;
2605 section = section->next)
2607 if (top_index < section->index)
2608 top_index = section->index;
2611 htab->top_index = top_index;
2612 amt = sizeof (asection *) * (top_index + 1);
2613 input_list = (asection **) bfd_malloc (amt);
2614 htab->input_list = input_list;
2615 if (input_list == NULL)
2616 return -1;
2618 /* For sections we aren't interested in, mark their entries with a
2619 value we can check later. */
2620 list = input_list + top_index;
2622 *list = bfd_abs_section_ptr;
2623 while (list-- != input_list);
2625 for (section = output_bfd->sections;
2626 section != NULL;
2627 section = section->next)
2629 if ((section->flags & SEC_CODE) != 0)
2630 input_list[section->index] = NULL;
2633 return 1;
2636 /* The linker repeatedly calls this function for each input section,
2637 in the order that input sections are linked into output sections.
2638 Build lists of input sections to determine groupings between which
2639 we may insert linker stubs. */
2641 void
2642 elf32_hppa_next_input_section (info, isec)
2643 struct bfd_link_info *info;
2644 asection *isec;
2646 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
2648 if (isec->output_section->index <= htab->top_index)
2650 asection **list = htab->input_list + isec->output_section->index;
2651 if (*list != bfd_abs_section_ptr)
2653 /* Steal the link_sec pointer for our list. */
2654 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
2655 /* This happens to make the list in reverse order,
2656 which is what we want. */
2657 PREV_SEC (isec) = *list;
2658 *list = isec;
2663 /* See whether we can group stub sections together. Grouping stub
2664 sections may result in fewer stubs. More importantly, we need to
2665 put all .init* and .fini* stubs at the beginning of the .init or
2666 .fini output sections respectively, because glibc splits the
2667 _init and _fini functions into multiple parts. Putting a stub in
2668 the middle of a function is not a good idea. */
2670 static void
2671 group_sections (htab, stub_group_size, stubs_always_before_branch)
2672 struct elf32_hppa_link_hash_table *htab;
2673 bfd_size_type stub_group_size;
2674 boolean stubs_always_before_branch;
2676 asection **list = htab->input_list + htab->top_index;
2679 asection *tail = *list;
2680 if (tail == bfd_abs_section_ptr)
2681 continue;
2682 while (tail != NULL)
2684 asection *curr;
2685 asection *prev;
2686 bfd_size_type total;
2688 curr = tail;
2689 if (tail->_cooked_size)
2690 total = tail->_cooked_size;
2691 else
2692 total = tail->_raw_size;
2693 while ((prev = PREV_SEC (curr)) != NULL
2694 && ((total += curr->output_offset - prev->output_offset)
2695 < stub_group_size))
2696 curr = prev;
2698 /* OK, the size from the start of CURR to the end is less
2699 than 240000 bytes and thus can be handled by one stub
2700 section. (or the tail section is itself larger than
2701 240000 bytes, in which case we may be toast.)
2702 We should really be keeping track of the total size of
2703 stubs added here, as stubs contribute to the final output
2704 section size. That's a little tricky, and this way will
2705 only break if stubs added total more than 22144 bytes, or
2706 2768 long branch stubs. It seems unlikely for more than
2707 2768 different functions to be called, especially from
2708 code only 240000 bytes long. This limit used to be
2709 250000, but c++ code tends to generate lots of little
2710 functions, and sometimes violated the assumption. */
2713 prev = PREV_SEC (tail);
2714 /* Set up this stub group. */
2715 htab->stub_group[tail->id].link_sec = curr;
2717 while (tail != curr && (tail = prev) != NULL);
2719 /* But wait, there's more! Input sections up to 240000
2720 bytes before the stub section can be handled by it too. */
2721 if (!stubs_always_before_branch)
2723 total = 0;
2724 while (prev != NULL
2725 && ((total += tail->output_offset - prev->output_offset)
2726 < stub_group_size))
2728 tail = prev;
2729 prev = PREV_SEC (tail);
2730 htab->stub_group[tail->id].link_sec = curr;
2733 tail = prev;
2736 while (list-- != htab->input_list);
2737 free (htab->input_list);
2738 #undef PREV_SEC
2741 /* Read in all local syms for all input bfds, and create hash entries
2742 for export stubs if we are building a multi-subspace shared lib.
2743 Returns -1 on error, 1 if export stubs created, 0 otherwise. */
2745 static int
2746 get_local_syms (output_bfd, input_bfd, info)
2747 bfd *output_bfd;
2748 bfd *input_bfd;
2749 struct bfd_link_info *info;
2751 unsigned int bfd_indx;
2752 Elf_Internal_Sym *local_syms, **all_local_syms;
2753 int stub_changed = 0;
2754 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
2756 /* We want to read in symbol extension records only once. To do this
2757 we need to read in the local symbols in parallel and save them for
2758 later use; so hold pointers to the local symbols in an array. */
2759 bfd_size_type amt = sizeof (Elf_Internal_Sym *) * htab->bfd_count;
2760 all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt);
2761 htab->all_local_syms = all_local_syms;
2762 if (all_local_syms == NULL)
2763 return -1;
2765 /* Walk over all the input BFDs, swapping in local symbols.
2766 If we are creating a shared library, create hash entries for the
2767 export stubs. */
2768 for (bfd_indx = 0;
2769 input_bfd != NULL;
2770 input_bfd = input_bfd->link_next, bfd_indx++)
2772 Elf_Internal_Shdr *symtab_hdr;
2773 Elf_Internal_Shdr *shndx_hdr;
2774 Elf_Internal_Sym *isym;
2775 Elf32_External_Sym *ext_syms, *esym, *end_sy;
2776 Elf_External_Sym_Shndx *shndx_buf, *shndx;
2777 bfd_size_type sec_size;
2779 /* We'll need the symbol table in a second. */
2780 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2781 if (symtab_hdr->sh_info == 0)
2782 continue;
2784 /* We need an array of the local symbols attached to the input bfd.
2785 Unfortunately, we're going to have to read & swap them in. */
2786 sec_size = symtab_hdr->sh_info;
2787 sec_size *= sizeof (Elf_Internal_Sym);
2788 local_syms = (Elf_Internal_Sym *) bfd_malloc (sec_size);
2789 if (local_syms == NULL)
2790 return -1;
2792 all_local_syms[bfd_indx] = local_syms;
2793 sec_size = symtab_hdr->sh_info;
2794 sec_size *= sizeof (Elf32_External_Sym);
2795 ext_syms = (Elf32_External_Sym *) bfd_malloc (sec_size);
2796 if (ext_syms == NULL)
2797 return -1;
2799 if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
2800 || bfd_bread ((PTR) ext_syms, sec_size, input_bfd) != sec_size)
2802 error_ret_free_ext_syms:
2803 free (ext_syms);
2804 return -1;
2807 shndx_buf = NULL;
2808 shndx_hdr = &elf_tdata (input_bfd)->symtab_shndx_hdr;
2809 if (shndx_hdr->sh_size != 0)
2811 sec_size = symtab_hdr->sh_info;
2812 sec_size *= sizeof (Elf_External_Sym_Shndx);
2813 shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (sec_size);
2814 if (shndx_buf == NULL)
2815 goto error_ret_free_ext_syms;
2817 if (bfd_seek (input_bfd, shndx_hdr->sh_offset, SEEK_SET) != 0
2818 || bfd_bread ((PTR) shndx_buf, sec_size, input_bfd) != sec_size)
2820 free (shndx_buf);
2821 goto error_ret_free_ext_syms;
2825 /* Swap the local symbols in. */
2826 for (esym = ext_syms, end_sy = esym + symtab_hdr->sh_info,
2827 isym = local_syms, shndx = shndx_buf;
2828 esym < end_sy;
2829 esym++, isym++, shndx = (shndx ? shndx + 1 : NULL))
2830 bfd_elf32_swap_symbol_in (input_bfd, (const PTR) esym,
2831 (const PTR) shndx, isym);
2833 /* Now we can free the external symbols. */
2834 free (shndx_buf);
2835 free (ext_syms);
2837 if (info->shared && htab->multi_subspace)
2839 struct elf_link_hash_entry **sym_hashes;
2840 struct elf_link_hash_entry **end_hashes;
2841 unsigned int symcount;
2843 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2844 - symtab_hdr->sh_info);
2845 sym_hashes = elf_sym_hashes (input_bfd);
2846 end_hashes = sym_hashes + symcount;
2848 /* Look through the global syms for functions; We need to
2849 build export stubs for all globally visible functions. */
2850 for (; sym_hashes < end_hashes; sym_hashes++)
2852 struct elf32_hppa_link_hash_entry *hash;
2854 hash = (struct elf32_hppa_link_hash_entry *) *sym_hashes;
2856 while (hash->elf.root.type == bfd_link_hash_indirect
2857 || hash->elf.root.type == bfd_link_hash_warning)
2858 hash = ((struct elf32_hppa_link_hash_entry *)
2859 hash->elf.root.u.i.link);
2861 /* At this point in the link, undefined syms have been
2862 resolved, so we need to check that the symbol was
2863 defined in this BFD. */
2864 if ((hash->elf.root.type == bfd_link_hash_defined
2865 || hash->elf.root.type == bfd_link_hash_defweak)
2866 && hash->elf.type == STT_FUNC
2867 && hash->elf.root.u.def.section->output_section != NULL
2868 && (hash->elf.root.u.def.section->output_section->owner
2869 == output_bfd)
2870 && hash->elf.root.u.def.section->owner == input_bfd
2871 && (hash->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
2872 && !(hash->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)
2873 && ELF_ST_VISIBILITY (hash->elf.other) == STV_DEFAULT)
2875 asection *sec;
2876 const char *stub_name;
2877 struct elf32_hppa_stub_hash_entry *stub_entry;
2879 sec = hash->elf.root.u.def.section;
2880 stub_name = hash->elf.root.root.string;
2881 stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table,
2882 stub_name,
2883 false, false);
2884 if (stub_entry == NULL)
2886 stub_entry = hppa_add_stub (stub_name, sec, htab);
2887 if (!stub_entry)
2888 return -1;
2890 stub_entry->target_value = hash->elf.root.u.def.value;
2891 stub_entry->target_section = hash->elf.root.u.def.section;
2892 stub_entry->stub_type = hppa_stub_export;
2893 stub_entry->h = hash;
2894 stub_changed = 1;
2896 else
2898 (*_bfd_error_handler) (_("%s: duplicate export stub %s"),
2899 bfd_archive_filename (input_bfd),
2900 stub_name);
2907 return stub_changed;
2910 /* Determine and set the size of the stub section for a final link.
2912 The basic idea here is to examine all the relocations looking for
2913 PC-relative calls to a target that is unreachable with a "bl"
2914 instruction. */
2916 boolean
2917 elf32_hppa_size_stubs (output_bfd, stub_bfd, info, multi_subspace, group_size,
2918 add_stub_section, layout_sections_again)
2919 bfd *output_bfd;
2920 bfd *stub_bfd;
2921 struct bfd_link_info *info;
2922 boolean multi_subspace;
2923 bfd_signed_vma group_size;
2924 asection * (*add_stub_section) PARAMS ((const char *, asection *));
2925 void (*layout_sections_again) PARAMS ((void));
2927 bfd_size_type stub_group_size;
2928 boolean stubs_always_before_branch;
2929 boolean stub_changed;
2930 boolean ret = 0;
2931 struct elf32_hppa_link_hash_table *htab = hppa_link_hash_table (info);
2933 /* Stash our params away. */
2934 htab->stub_bfd = stub_bfd;
2935 htab->multi_subspace = multi_subspace;
2936 htab->add_stub_section = add_stub_section;
2937 htab->layout_sections_again = layout_sections_again;
2938 stubs_always_before_branch = group_size < 0;
2939 if (group_size < 0)
2940 stub_group_size = -group_size;
2941 else
2942 stub_group_size = group_size;
2943 if (stub_group_size == 1)
2945 /* Default values. */
2946 stub_group_size = 7680000;
2947 if (htab->has_17bit_branch || htab->multi_subspace)
2948 stub_group_size = 240000;
2949 if (htab->has_12bit_branch)
2950 stub_group_size = 7500;
2953 group_sections (htab, stub_group_size, stubs_always_before_branch);
2955 switch (get_local_syms (output_bfd, info->input_bfds, info))
2957 default:
2958 if (htab->all_local_syms)
2959 goto error_ret_free_local;
2960 return false;
2962 case 0:
2963 stub_changed = false;
2964 break;
2966 case 1:
2967 stub_changed = true;
2968 break;
2971 while (1)
2973 bfd *input_bfd;
2974 unsigned int bfd_indx;
2975 asection *stub_sec;
2977 for (input_bfd = info->input_bfds, bfd_indx = 0;
2978 input_bfd != NULL;
2979 input_bfd = input_bfd->link_next, bfd_indx++)
2981 Elf_Internal_Shdr *symtab_hdr;
2982 asection *section;
2983 Elf_Internal_Sym *local_syms;
2985 /* We'll need the symbol table in a second. */
2986 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2987 if (symtab_hdr->sh_info == 0)
2988 continue;
2990 local_syms = htab->all_local_syms[bfd_indx];
2992 /* Walk over each section attached to the input bfd. */
2993 for (section = input_bfd->sections;
2994 section != NULL;
2995 section = section->next)
2997 Elf_Internal_Shdr *input_rel_hdr;
2998 Elf32_External_Rela *external_relocs, *erelaend, *erela;
2999 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3000 bfd_size_type amt;
3002 /* If there aren't any relocs, then there's nothing more
3003 to do. */
3004 if ((section->flags & SEC_RELOC) == 0
3005 || section->reloc_count == 0)
3006 continue;
3008 /* If this section is a link-once section that will be
3009 discarded, then don't create any stubs. */
3010 if (section->output_section == NULL
3011 || section->output_section->owner != output_bfd)
3012 continue;
3014 /* Allocate space for the external relocations. */
3015 amt = section->reloc_count;
3016 amt *= sizeof (Elf32_External_Rela);
3017 external_relocs = (Elf32_External_Rela *) bfd_malloc (amt);
3018 if (external_relocs == NULL)
3020 goto error_ret_free_local;
3023 /* Likewise for the internal relocations. */
3024 amt = section->reloc_count;
3025 amt *= sizeof (Elf_Internal_Rela);
3026 internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt);
3027 if (internal_relocs == NULL)
3029 free (external_relocs);
3030 goto error_ret_free_local;
3033 /* Read in the external relocs. */
3034 input_rel_hdr = &elf_section_data (section)->rel_hdr;
3035 if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0
3036 || bfd_bread ((PTR) external_relocs,
3037 input_rel_hdr->sh_size,
3038 input_bfd) != input_rel_hdr->sh_size)
3040 free (external_relocs);
3041 error_ret_free_internal:
3042 free (internal_relocs);
3043 goto error_ret_free_local;
3046 /* Swap in the relocs. */
3047 erela = external_relocs;
3048 erelaend = erela + section->reloc_count;
3049 irela = internal_relocs;
3050 for (; erela < erelaend; erela++, irela++)
3051 bfd_elf32_swap_reloca_in (input_bfd, erela, irela);
3053 /* We're done with the external relocs, free them. */
3054 free (external_relocs);
3056 /* Now examine each relocation. */
3057 irela = internal_relocs;
3058 irelaend = irela + section->reloc_count;
3059 for (; irela < irelaend; irela++)
3061 unsigned int r_type, r_indx;
3062 enum elf32_hppa_stub_type stub_type;
3063 struct elf32_hppa_stub_hash_entry *stub_entry;
3064 asection *sym_sec;
3065 bfd_vma sym_value;
3066 bfd_vma destination;
3067 struct elf32_hppa_link_hash_entry *hash;
3068 char *stub_name;
3069 const asection *id_sec;
3071 r_type = ELF32_R_TYPE (irela->r_info);
3072 r_indx = ELF32_R_SYM (irela->r_info);
3074 if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
3076 bfd_set_error (bfd_error_bad_value);
3077 goto error_ret_free_internal;
3080 /* Only look for stubs on call instructions. */
3081 if (r_type != (unsigned int) R_PARISC_PCREL12F
3082 && r_type != (unsigned int) R_PARISC_PCREL17F
3083 && r_type != (unsigned int) R_PARISC_PCREL22F)
3084 continue;
3086 /* Now determine the call target, its name, value,
3087 section. */
3088 sym_sec = NULL;
3089 sym_value = 0;
3090 destination = 0;
3091 hash = NULL;
3092 if (r_indx < symtab_hdr->sh_info)
3094 /* It's a local symbol. */
3095 Elf_Internal_Sym *sym;
3096 Elf_Internal_Shdr *hdr;
3098 sym = local_syms + r_indx;
3099 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
3100 sym_sec = hdr->bfd_section;
3101 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3102 sym_value = sym->st_value;
3103 destination = (sym_value + irela->r_addend
3104 + sym_sec->output_offset
3105 + sym_sec->output_section->vma);
3107 else
3109 /* It's an external symbol. */
3110 int e_indx;
3112 e_indx = r_indx - symtab_hdr->sh_info;
3113 hash = ((struct elf32_hppa_link_hash_entry *)
3114 elf_sym_hashes (input_bfd)[e_indx]);
3116 while (hash->elf.root.type == bfd_link_hash_indirect
3117 || hash->elf.root.type == bfd_link_hash_warning)
3118 hash = ((struct elf32_hppa_link_hash_entry *)
3119 hash->elf.root.u.i.link);
3121 if (hash->elf.root.type == bfd_link_hash_defined
3122 || hash->elf.root.type == bfd_link_hash_defweak)
3124 sym_sec = hash->elf.root.u.def.section;
3125 sym_value = hash->elf.root.u.def.value;
3126 if (sym_sec->output_section != NULL)
3127 destination = (sym_value + irela->r_addend
3128 + sym_sec->output_offset
3129 + sym_sec->output_section->vma);
3131 else if (hash->elf.root.type == bfd_link_hash_undefweak)
3133 if (! info->shared)
3134 continue;
3136 else if (hash->elf.root.type == bfd_link_hash_undefined)
3138 if (! (info->shared
3139 && !info->no_undefined
3140 && (ELF_ST_VISIBILITY (hash->elf.other)
3141 == STV_DEFAULT)
3142 && hash->elf.type != STT_PARISC_MILLI))
3143 continue;
3145 else
3147 bfd_set_error (bfd_error_bad_value);
3148 goto error_ret_free_internal;
3152 /* Determine what (if any) linker stub is needed. */
3153 stub_type = hppa_type_of_stub (section, irela, hash,
3154 destination);
3155 if (stub_type == hppa_stub_none)
3156 continue;
3158 /* Support for grouping stub sections. */
3159 id_sec = htab->stub_group[section->id].link_sec;
3161 /* Get the name of this stub. */
3162 stub_name = hppa_stub_name (id_sec, sym_sec, hash, irela);
3163 if (!stub_name)
3164 goto error_ret_free_internal;
3166 stub_entry = hppa_stub_hash_lookup (&htab->stub_hash_table,
3167 stub_name,
3168 false, false);
3169 if (stub_entry != NULL)
3171 /* The proper stub has already been created. */
3172 free (stub_name);
3173 continue;
3176 stub_entry = hppa_add_stub (stub_name, section, htab);
3177 if (stub_entry == NULL)
3179 free (stub_name);
3180 goto error_ret_free_local;
3183 stub_entry->target_value = sym_value;
3184 stub_entry->target_section = sym_sec;
3185 stub_entry->stub_type = stub_type;
3186 if (info->shared)
3188 if (stub_type == hppa_stub_import)
3189 stub_entry->stub_type = hppa_stub_import_shared;
3190 else if (stub_type == hppa_stub_long_branch)
3191 stub_entry->stub_type = hppa_stub_long_branch_shared;
3193 stub_entry->h = hash;
3194 stub_changed = true;
3197 /* We're done with the internal relocs, free them. */
3198 free (internal_relocs);
3202 if (!stub_changed)
3203 break;
3205 /* OK, we've added some stubs. Find out the new size of the
3206 stub sections. */
3207 for (stub_sec = htab->stub_bfd->sections;
3208 stub_sec != NULL;
3209 stub_sec = stub_sec->next)
3211 stub_sec->_raw_size = 0;
3212 stub_sec->_cooked_size = 0;
3215 bfd_hash_traverse (&htab->stub_hash_table, hppa_size_one_stub, htab);
3217 /* Ask the linker to do its stuff. */
3218 (*htab->layout_sections_again) ();
3219 stub_changed = false;
3222 ret = true;
3224 error_ret_free_local:
3225 while (htab->bfd_count-- > 0)
3226 if (htab->all_local_syms[htab->bfd_count])
3227 free (htab->all_local_syms[htab->bfd_count]);
3228 free (htab->all_local_syms);
3230 return ret;
3233 /* For a final link, this function is called after we have sized the
3234 stubs to provide a value for __gp. */
3236 boolean
3237 elf32_hppa_set_gp (abfd, info)
3238 bfd *abfd;
3239 struct bfd_link_info *info;
3241 struct bfd_link_hash_entry *h;
3242 asection *sec = NULL;
3243 bfd_vma gp_val = 0;
3244 struct elf32_hppa_link_hash_table *htab;
3246 htab = hppa_link_hash_table (info);
3247 h = bfd_link_hash_lookup (&htab->elf.root, "$global$", false, false, false);
3249 if (h != NULL
3250 && (h->type == bfd_link_hash_defined
3251 || h->type == bfd_link_hash_defweak))
3253 gp_val = h->u.def.value;
3254 sec = h->u.def.section;
3256 else
3258 asection *splt;
3259 asection *sgot;
3261 if (htab->elf.root.creator->flavour == bfd_target_elf_flavour)
3263 splt = htab->splt;
3264 sgot = htab->sgot;
3266 else
3268 /* If we're not elf, look up the output sections in the
3269 hope we may actually find them. */
3270 splt = bfd_get_section_by_name (abfd, ".plt");
3271 sgot = bfd_get_section_by_name (abfd, ".got");
3274 /* Choose to point our LTP at, in this order, one of .plt, .got,
3275 or .data, if these sections exist. In the case of choosing
3276 .plt try to make the LTP ideal for addressing anywhere in the
3277 .plt or .got with a 14 bit signed offset. Typically, the end
3278 of the .plt is the start of the .got, so choose .plt + 0x2000
3279 if either the .plt or .got is larger than 0x2000. If both
3280 the .plt and .got are smaller than 0x2000, choose the end of
3281 the .plt section. */
3282 sec = splt;
3283 if (sec != NULL)
3285 gp_val = sec->_raw_size;
3286 if (gp_val > 0x2000 || (sgot && sgot->_raw_size > 0x2000))
3288 gp_val = 0x2000;
3291 else
3293 sec = sgot;
3294 if (sec != NULL)
3296 /* We know we don't have a .plt. If .got is large,
3297 offset our LTP. */
3298 if (sec->_raw_size > 0x2000)
3299 gp_val = 0x2000;
3301 else
3303 /* No .plt or .got. Who cares what the LTP is? */
3304 sec = bfd_get_section_by_name (abfd, ".data");
3308 if (h != NULL)
3310 h->type = bfd_link_hash_defined;
3311 h->u.def.value = gp_val;
3312 if (sec != NULL)
3313 h->u.def.section = sec;
3314 else
3315 h->u.def.section = bfd_abs_section_ptr;
3319 if (sec != NULL && sec->output_section != NULL)
3320 gp_val += sec->output_section->vma + sec->output_offset;
3322 elf_gp (abfd) = gp_val;
3323 return true;
3326 /* Build all the stubs associated with the current output file. The
3327 stubs are kept in a hash table attached to the main linker hash
3328 table. We also set up the .plt entries for statically linked PIC
3329 functions here. This function is called via hppaelf_finish in the
3330 linker. */
3332 boolean
3333 elf32_hppa_build_stubs (info)
3334 struct bfd_link_info *info;
3336 asection *stub_sec;
3337 struct bfd_hash_table *table;
3338 struct elf32_hppa_link_hash_table *htab;
3340 htab = hppa_link_hash_table (info);
3342 for (stub_sec = htab->stub_bfd->sections;
3343 stub_sec != NULL;
3344 stub_sec = stub_sec->next)
3346 bfd_size_type size;
3348 /* Allocate memory to hold the linker stubs. */
3349 size = stub_sec->_raw_size;
3350 stub_sec->contents = (unsigned char *) bfd_zalloc (htab->stub_bfd, size);
3351 if (stub_sec->contents == NULL && size != 0)
3352 return false;
3353 stub_sec->_raw_size = 0;
3356 /* Build the stubs as directed by the stub hash table. */
3357 table = &htab->stub_hash_table;
3358 bfd_hash_traverse (table, hppa_build_one_stub, info);
3360 return true;
3363 /* Perform a final link. */
3365 static boolean
3366 elf32_hppa_final_link (abfd, info)
3367 bfd *abfd;
3368 struct bfd_link_info *info;
3370 /* Invoke the regular ELF linker to do all the work. */
3371 if (!bfd_elf32_bfd_final_link (abfd, info))
3372 return false;
3374 /* If we're producing a final executable, sort the contents of the
3375 unwind section. */
3376 return elf_hppa_sort_unwind (abfd);
3379 /* Record the lowest address for the data and text segments. */
3381 static void
3382 hppa_record_segment_addr (abfd, section, data)
3383 bfd *abfd ATTRIBUTE_UNUSED;
3384 asection *section;
3385 PTR data;
3387 struct elf32_hppa_link_hash_table *htab;
3389 htab = (struct elf32_hppa_link_hash_table *) data;
3391 if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3393 bfd_vma value = section->vma - section->filepos;
3395 if ((section->flags & SEC_READONLY) != 0)
3397 if (value < htab->text_segment_base)
3398 htab->text_segment_base = value;
3400 else
3402 if (value < htab->data_segment_base)
3403 htab->data_segment_base = value;
3408 /* Perform a relocation as part of a final link. */
3410 static bfd_reloc_status_type
3411 final_link_relocate (input_section, contents, rel, value, htab, sym_sec, h)
3412 asection *input_section;
3413 bfd_byte *contents;
3414 const Elf_Internal_Rela *rel;
3415 bfd_vma value;
3416 struct elf32_hppa_link_hash_table *htab;
3417 asection *sym_sec;
3418 struct elf32_hppa_link_hash_entry *h;
3420 int insn;
3421 unsigned int r_type = ELF32_R_TYPE (rel->r_info);
3422 reloc_howto_type *howto = elf_hppa_howto_table + r_type;
3423 int r_format = howto->bitsize;
3424 enum hppa_reloc_field_selector_type_alt r_field;
3425 bfd *input_bfd = input_section->owner;
3426 bfd_vma offset = rel->r_offset;
3427 bfd_vma max_branch_offset = 0;
3428 bfd_byte *hit_data = contents + offset;
3429 bfd_signed_vma addend = rel->r_addend;
3430 bfd_vma location;
3431 struct elf32_hppa_stub_hash_entry *stub_entry = NULL;
3432 int val;
3434 if (r_type == R_PARISC_NONE)
3435 return bfd_reloc_ok;
3437 insn = bfd_get_32 (input_bfd, hit_data);
3439 /* Find out where we are and where we're going. */
3440 location = (offset +
3441 input_section->output_offset +
3442 input_section->output_section->vma);
3444 switch (r_type)
3446 case R_PARISC_PCREL12F:
3447 case R_PARISC_PCREL17F:
3448 case R_PARISC_PCREL22F:
3449 /* If this call should go via the plt, find the import stub in
3450 the stub hash. */
3451 if (sym_sec == NULL
3452 || sym_sec->output_section == NULL
3453 || (h != NULL
3454 && h->elf.plt.offset != (bfd_vma) -1
3455 && (h->elf.dynindx != -1 || h->pic_call)
3456 && !h->plabel))
3458 stub_entry = hppa_get_stub_entry (input_section, sym_sec,
3459 h, rel, htab);
3460 if (stub_entry != NULL)
3462 value = (stub_entry->stub_offset
3463 + stub_entry->stub_sec->output_offset
3464 + stub_entry->stub_sec->output_section->vma);
3465 addend = 0;
3467 else if (sym_sec == NULL && h != NULL
3468 && h->elf.root.type == bfd_link_hash_undefweak)
3470 /* It's OK if undefined weak. Calls to undefined weak
3471 symbols behave as if the "called" function
3472 immediately returns. We can thus call to a weak
3473 function without first checking whether the function
3474 is defined. */
3475 value = location;
3476 addend = 8;
3478 else
3479 return bfd_reloc_undefined;
3481 /* Fall thru. */
3483 case R_PARISC_PCREL21L:
3484 case R_PARISC_PCREL17C:
3485 case R_PARISC_PCREL17R:
3486 case R_PARISC_PCREL14R:
3487 case R_PARISC_PCREL14F:
3488 /* Make it a pc relative offset. */
3489 value -= location;
3490 addend -= 8;
3491 break;
3493 case R_PARISC_DPREL21L:
3494 case R_PARISC_DPREL14R:
3495 case R_PARISC_DPREL14F:
3496 /* For all the DP relative relocations, we need to examine the symbol's
3497 section. If it's a code section, then "data pointer relative" makes
3498 no sense. In that case we don't adjust the "value", and for 21 bit
3499 addil instructions, we change the source addend register from %dp to
3500 %r0. This situation commonly arises when a variable's "constness"
3501 is declared differently from the way the variable is defined. For
3502 instance: "extern int foo" with foo defined as "const int foo". */
3503 if (sym_sec == NULL)
3504 break;
3505 if ((sym_sec->flags & SEC_CODE) != 0)
3507 if ((insn & ((0x3f << 26) | (0x1f << 21)))
3508 == (((int) OP_ADDIL << 26) | (27 << 21)))
3510 insn &= ~ (0x1f << 21);
3511 #if 0 /* debug them. */
3512 (*_bfd_error_handler)
3513 (_("%s(%s+0x%lx): fixing %s"),
3514 bfd_archive_filename (input_bfd),
3515 input_section->name,
3516 (long) rel->r_offset,
3517 howto->name);
3518 #endif
3520 /* Now try to make things easy for the dynamic linker. */
3522 break;
3524 /* Fall thru. */
3526 case R_PARISC_DLTIND21L:
3527 case R_PARISC_DLTIND14R:
3528 case R_PARISC_DLTIND14F:
3529 value -= elf_gp (input_section->output_section->owner);
3530 break;
3532 case R_PARISC_SEGREL32:
3533 if ((sym_sec->flags & SEC_CODE) != 0)
3534 value -= htab->text_segment_base;
3535 else
3536 value -= htab->data_segment_base;
3537 break;
3539 default:
3540 break;
3543 switch (r_type)
3545 case R_PARISC_DIR32:
3546 case R_PARISC_DIR14F:
3547 case R_PARISC_DIR17F:
3548 case R_PARISC_PCREL17C:
3549 case R_PARISC_PCREL14F:
3550 case R_PARISC_DPREL14F:
3551 case R_PARISC_PLABEL32:
3552 case R_PARISC_DLTIND14F:
3553 case R_PARISC_SEGBASE:
3554 case R_PARISC_SEGREL32:
3555 r_field = e_fsel;
3556 break;
3558 case R_PARISC_DLTIND21L:
3559 case R_PARISC_PCREL21L:
3560 case R_PARISC_PLABEL21L:
3561 r_field = e_lsel;
3562 break;
3564 case R_PARISC_DIR21L:
3565 case R_PARISC_DPREL21L:
3566 r_field = e_lrsel;
3567 break;
3569 case R_PARISC_PCREL17R:
3570 case R_PARISC_PCREL14R:
3571 case R_PARISC_PLABEL14R:
3572 case R_PARISC_DLTIND14R:
3573 r_field = e_rsel;
3574 break;
3576 case R_PARISC_DIR17R:
3577 case R_PARISC_DIR14R:
3578 case R_PARISC_DPREL14R:
3579 r_field = e_rrsel;
3580 break;
3582 case R_PARISC_PCREL12F:
3583 case R_PARISC_PCREL17F:
3584 case R_PARISC_PCREL22F:
3585 r_field = e_fsel;
3587 if (r_type == (unsigned int) R_PARISC_PCREL17F)
3589 max_branch_offset = (1 << (17-1)) << 2;
3591 else if (r_type == (unsigned int) R_PARISC_PCREL12F)
3593 max_branch_offset = (1 << (12-1)) << 2;
3595 else
3597 max_branch_offset = (1 << (22-1)) << 2;
3600 /* sym_sec is NULL on undefined weak syms or when shared on
3601 undefined syms. We've already checked for a stub for the
3602 shared undefined case. */
3603 if (sym_sec == NULL)
3604 break;
3606 /* If the branch is out of reach, then redirect the
3607 call to the local stub for this function. */
3608 if (value + addend + max_branch_offset >= 2*max_branch_offset)
3610 stub_entry = hppa_get_stub_entry (input_section, sym_sec,
3611 h, rel, htab);
3612 if (stub_entry == NULL)
3613 return bfd_reloc_undefined;
3615 /* Munge up the value and addend so that we call the stub
3616 rather than the procedure directly. */
3617 value = (stub_entry->stub_offset
3618 + stub_entry->stub_sec->output_offset
3619 + stub_entry->stub_sec->output_section->vma
3620 - location);
3621 addend = -8;
3623 break;
3625 /* Something we don't know how to handle. */
3626 default:
3627 return bfd_reloc_notsupported;
3630 /* Make sure we can reach the stub. */
3631 if (max_branch_offset != 0
3632 && value + addend + max_branch_offset >= 2*max_branch_offset)
3634 (*_bfd_error_handler)
3635 (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
3636 bfd_archive_filename (input_bfd),
3637 input_section->name,
3638 (long) rel->r_offset,
3639 stub_entry->root.string);
3640 bfd_set_error (bfd_error_bad_value);
3641 return bfd_reloc_notsupported;
3644 val = hppa_field_adjust (value, addend, r_field);
3646 switch (r_type)
3648 case R_PARISC_PCREL12F:
3649 case R_PARISC_PCREL17C:
3650 case R_PARISC_PCREL17F:
3651 case R_PARISC_PCREL17R:
3652 case R_PARISC_PCREL22F:
3653 case R_PARISC_DIR17F:
3654 case R_PARISC_DIR17R:
3655 /* This is a branch. Divide the offset by four.
3656 Note that we need to decide whether it's a branch or
3657 otherwise by inspecting the reloc. Inspecting insn won't
3658 work as insn might be from a .word directive. */
3659 val >>= 2;
3660 break;
3662 default:
3663 break;
3666 insn = hppa_rebuild_insn (insn, val, r_format);
3668 /* Update the instruction word. */
3669 bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data);
3670 return bfd_reloc_ok;
3673 /* Relocate an HPPA ELF section. */
3675 static boolean
3676 elf32_hppa_relocate_section (output_bfd, info, input_bfd, input_section,
3677 contents, relocs, local_syms, local_sections)
3678 bfd *output_bfd;
3679 struct bfd_link_info *info;
3680 bfd *input_bfd;
3681 asection *input_section;
3682 bfd_byte *contents;
3683 Elf_Internal_Rela *relocs;
3684 Elf_Internal_Sym *local_syms;
3685 asection **local_sections;
3687 bfd_vma *local_got_offsets;
3688 struct elf32_hppa_link_hash_table *htab;
3689 Elf_Internal_Shdr *symtab_hdr;
3690 Elf_Internal_Rela *rel;
3691 Elf_Internal_Rela *relend;
3693 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3695 htab = hppa_link_hash_table (info);
3696 local_got_offsets = elf_local_got_offsets (input_bfd);
3698 rel = relocs;
3699 relend = relocs + input_section->reloc_count;
3700 for (; rel < relend; rel++)
3702 unsigned int r_type;
3703 reloc_howto_type *howto;
3704 unsigned int r_symndx;
3705 struct elf32_hppa_link_hash_entry *h;
3706 Elf_Internal_Sym *sym;
3707 asection *sym_sec;
3708 bfd_vma relocation;
3709 bfd_reloc_status_type r;
3710 const char *sym_name;
3711 boolean plabel;
3712 boolean warned_undef;
3714 r_type = ELF32_R_TYPE (rel->r_info);
3715 if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
3717 bfd_set_error (bfd_error_bad_value);
3718 return false;
3720 if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY
3721 || r_type == (unsigned int) R_PARISC_GNU_VTINHERIT)
3722 continue;
3724 r_symndx = ELF32_R_SYM (rel->r_info);
3726 if (info->relocateable)
3728 /* This is a relocatable link. We don't have to change
3729 anything, unless the reloc is against a section symbol,
3730 in which case we have to adjust according to where the
3731 section symbol winds up in the output section. */
3732 if (r_symndx < symtab_hdr->sh_info)
3734 sym = local_syms + r_symndx;
3735 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3737 sym_sec = local_sections[r_symndx];
3738 rel->r_addend += sym_sec->output_offset;
3741 continue;
3744 /* This is a final link. */
3745 h = NULL;
3746 sym = NULL;
3747 sym_sec = NULL;
3748 warned_undef = false;
3749 if (r_symndx < symtab_hdr->sh_info)
3751 /* This is a local symbol, h defaults to NULL. */
3752 sym = local_syms + r_symndx;
3753 sym_sec = local_sections[r_symndx];
3754 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sym_sec, rel);
3756 else
3758 int indx;
3760 /* It's a global; Find its entry in the link hash. */
3761 indx = r_symndx - symtab_hdr->sh_info;
3762 h = ((struct elf32_hppa_link_hash_entry *)
3763 elf_sym_hashes (input_bfd)[indx]);
3764 while (h->elf.root.type == bfd_link_hash_indirect
3765 || h->elf.root.type == bfd_link_hash_warning)
3766 h = (struct elf32_hppa_link_hash_entry *) h->elf.root.u.i.link;
3768 relocation = 0;
3769 if (h->elf.root.type == bfd_link_hash_defined
3770 || h->elf.root.type == bfd_link_hash_defweak)
3772 sym_sec = h->elf.root.u.def.section;
3773 /* If sym_sec->output_section is NULL, then it's a
3774 symbol defined in a shared library. */
3775 if (sym_sec->output_section != NULL)
3776 relocation = (h->elf.root.u.def.value
3777 + sym_sec->output_offset
3778 + sym_sec->output_section->vma);
3780 else if (h->elf.root.type == bfd_link_hash_undefweak)
3782 else if (info->shared && !info->no_undefined
3783 && ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
3784 && h->elf.type != STT_PARISC_MILLI)
3786 if (info->symbolic && !info->allow_shlib_undefined)
3788 if (!((*info->callbacks->undefined_symbol)
3789 (info, h->elf.root.root.string, input_bfd,
3790 input_section, rel->r_offset, false)))
3791 return false;
3792 warned_undef = true;
3795 else
3797 if (!((*info->callbacks->undefined_symbol)
3798 (info, h->elf.root.root.string, input_bfd,
3799 input_section, rel->r_offset, true)))
3800 return false;
3801 warned_undef = true;
3805 /* Do any required modifications to the relocation value, and
3806 determine what types of dynamic info we need to output, if
3807 any. */
3808 plabel = 0;
3809 switch (r_type)
3811 case R_PARISC_DLTIND14F:
3812 case R_PARISC_DLTIND14R:
3813 case R_PARISC_DLTIND21L:
3815 bfd_vma off;
3816 boolean do_got = 0;
3818 /* Relocation is to the entry for this symbol in the
3819 global offset table. */
3820 if (h != NULL)
3822 boolean dyn;
3824 off = h->elf.got.offset;
3825 dyn = htab->elf.dynamic_sections_created;
3826 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, &h->elf))
3828 /* If we aren't going to call finish_dynamic_symbol,
3829 then we need to handle initialisation of the .got
3830 entry and create needed relocs here. Since the
3831 offset must always be a multiple of 4, we use the
3832 least significant bit to record whether we have
3833 initialised it already. */
3834 if ((off & 1) != 0)
3835 off &= ~1;
3836 else
3838 h->elf.got.offset |= 1;
3839 do_got = 1;
3843 else
3845 /* Local symbol case. */
3846 if (local_got_offsets == NULL)
3847 abort ();
3849 off = local_got_offsets[r_symndx];
3851 /* The offset must always be a multiple of 4. We use
3852 the least significant bit to record whether we have
3853 already generated the necessary reloc. */
3854 if ((off & 1) != 0)
3855 off &= ~1;
3856 else
3858 local_got_offsets[r_symndx] |= 1;
3859 do_got = 1;
3863 if (do_got)
3865 if (info->shared)
3867 /* Output a dynamic relocation for this GOT entry.
3868 In this case it is relative to the base of the
3869 object because the symbol index is zero. */
3870 Elf_Internal_Rela outrel;
3871 asection *srelgot = htab->srelgot;
3872 Elf32_External_Rela *loc;
3874 outrel.r_offset = (off
3875 + htab->sgot->output_offset
3876 + htab->sgot->output_section->vma);
3877 outrel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
3878 outrel.r_addend = relocation;
3879 loc = (Elf32_External_Rela *) srelgot->contents;
3880 loc += srelgot->reloc_count++;
3881 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3883 else
3884 bfd_put_32 (output_bfd, relocation,
3885 htab->sgot->contents + off);
3888 if (off >= (bfd_vma) -2)
3889 abort ();
3891 /* Add the base of the GOT to the relocation value. */
3892 relocation = (off
3893 + htab->sgot->output_offset
3894 + htab->sgot->output_section->vma);
3896 break;
3898 case R_PARISC_SEGREL32:
3899 /* If this is the first SEGREL relocation, then initialize
3900 the segment base values. */
3901 if (htab->text_segment_base == (bfd_vma) -1)
3902 bfd_map_over_sections (output_bfd, hppa_record_segment_addr, htab);
3903 break;
3905 case R_PARISC_PLABEL14R:
3906 case R_PARISC_PLABEL21L:
3907 case R_PARISC_PLABEL32:
3908 if (htab->elf.dynamic_sections_created)
3910 bfd_vma off;
3911 boolean do_plt = 0;
3913 /* If we have a global symbol with a PLT slot, then
3914 redirect this relocation to it. */
3915 if (h != NULL)
3917 off = h->elf.plt.offset;
3918 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, &h->elf))
3920 /* In a non-shared link, adjust_dynamic_symbols
3921 isn't called for symbols forced local. We
3922 need to write out the plt entry here. */
3923 if ((off & 1) != 0)
3924 off &= ~1;
3925 else
3927 h->elf.plt.offset |= 1;
3928 do_plt = 1;
3932 else
3934 bfd_vma *local_plt_offsets;
3936 if (local_got_offsets == NULL)
3937 abort ();
3939 local_plt_offsets = local_got_offsets + symtab_hdr->sh_info;
3940 off = local_plt_offsets[r_symndx];
3942 /* As for the local .got entry case, we use the last
3943 bit to record whether we've already initialised
3944 this local .plt entry. */
3945 if ((off & 1) != 0)
3946 off &= ~1;
3947 else
3949 local_plt_offsets[r_symndx] |= 1;
3950 do_plt = 1;
3954 if (do_plt)
3956 if (info->shared)
3958 /* Output a dynamic IPLT relocation for this
3959 PLT entry. */
3960 Elf_Internal_Rela outrel;
3961 asection *srelplt = htab->srelplt;
3962 Elf32_External_Rela *loc;
3964 outrel.r_offset = (off
3965 + htab->splt->output_offset
3966 + htab->splt->output_section->vma);
3967 outrel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
3968 outrel.r_addend = relocation;
3969 loc = (Elf32_External_Rela *) srelplt->contents;
3970 loc += srelplt->reloc_count++;
3971 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3973 else
3975 bfd_put_32 (output_bfd,
3976 relocation,
3977 htab->splt->contents + off);
3978 bfd_put_32 (output_bfd,
3979 elf_gp (htab->splt->output_section->owner),
3980 htab->splt->contents + off + 4);
3984 if (off >= (bfd_vma) -2)
3985 abort ();
3987 /* PLABELs contain function pointers. Relocation is to
3988 the entry for the function in the .plt. The magic +2
3989 offset signals to $$dyncall that the function pointer
3990 is in the .plt and thus has a gp pointer too.
3991 Exception: Undefined PLABELs should have a value of
3992 zero. */
3993 if (h == NULL
3994 || (h->elf.root.type != bfd_link_hash_undefweak
3995 && h->elf.root.type != bfd_link_hash_undefined))
3997 relocation = (off
3998 + htab->splt->output_offset
3999 + htab->splt->output_section->vma
4000 + 2);
4002 plabel = 1;
4004 /* Fall through and possibly emit a dynamic relocation. */
4006 case R_PARISC_DIR17F:
4007 case R_PARISC_DIR17R:
4008 case R_PARISC_DIR14F:
4009 case R_PARISC_DIR14R:
4010 case R_PARISC_DIR21L:
4011 case R_PARISC_DPREL14F:
4012 case R_PARISC_DPREL14R:
4013 case R_PARISC_DPREL21L:
4014 case R_PARISC_DIR32:
4015 /* r_symndx will be zero only for relocs against symbols
4016 from removed linkonce sections, or sections discarded by
4017 a linker script. */
4018 if (r_symndx == 0
4019 || (input_section->flags & SEC_ALLOC) == 0)
4020 break;
4022 /* The reloc types handled here and this conditional
4023 expression must match the code in ..check_relocs and
4024 allocate_dynrelocs. ie. We need exactly the same condition
4025 as in ..check_relocs, with some extra conditions (dynindx
4026 test in this case) to cater for relocs removed by
4027 allocate_dynrelocs. If you squint, the non-shared test
4028 here does indeed match the one in ..check_relocs, the
4029 difference being that here we test DEF_DYNAMIC as well as
4030 !DEF_REGULAR. All common syms end up with !DEF_REGULAR,
4031 which is why we can't use just that test here.
4032 Conversely, DEF_DYNAMIC can't be used in check_relocs as
4033 there all files have not been loaded. */
4034 if ((info->shared
4035 && (IS_ABSOLUTE_RELOC (r_type)
4036 || (h != NULL
4037 && h->elf.dynindx != -1
4038 && (!info->symbolic
4039 || (h->elf.elf_link_hash_flags
4040 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
4041 || (!info->shared
4042 && h != NULL
4043 && h->elf.dynindx != -1
4044 && (h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
4045 && (((h->elf.elf_link_hash_flags
4046 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
4047 && (h->elf.elf_link_hash_flags
4048 & ELF_LINK_HASH_DEF_REGULAR) == 0)
4049 || h->elf.root.type == bfd_link_hash_undefweak
4050 || h->elf.root.type == bfd_link_hash_undefined)))
4052 Elf_Internal_Rela outrel;
4053 boolean skip;
4054 asection *sreloc;
4055 Elf32_External_Rela *loc;
4057 /* When generating a shared object, these relocations
4058 are copied into the output file to be resolved at run
4059 time. */
4061 outrel.r_addend = rel->r_addend;
4062 outrel.r_offset =
4063 _bfd_elf_section_offset (output_bfd, info, input_section,
4064 rel->r_offset);
4065 skip = (outrel.r_offset == (bfd_vma) -1
4066 || outrel.r_offset == (bfd_vma) -2);
4067 outrel.r_offset += (input_section->output_offset
4068 + input_section->output_section->vma);
4070 if (skip)
4072 memset (&outrel, 0, sizeof (outrel));
4074 else if (h != NULL
4075 && h->elf.dynindx != -1
4076 && (plabel
4077 || !IS_ABSOLUTE_RELOC (r_type)
4078 || !info->shared
4079 || !info->symbolic
4080 || (h->elf.elf_link_hash_flags
4081 & ELF_LINK_HASH_DEF_REGULAR) == 0))
4083 outrel.r_info = ELF32_R_INFO (h->elf.dynindx, r_type);
4085 else /* It's a local symbol, or one marked to become local. */
4087 int indx = 0;
4089 /* Add the absolute offset of the symbol. */
4090 outrel.r_addend += relocation;
4092 /* Global plabels need to be processed by the
4093 dynamic linker so that functions have at most one
4094 fptr. For this reason, we need to differentiate
4095 between global and local plabels, which we do by
4096 providing the function symbol for a global plabel
4097 reloc, and no symbol for local plabels. */
4098 if (! plabel
4099 && sym_sec != NULL
4100 && sym_sec->output_section != NULL
4101 && ! bfd_is_abs_section (sym_sec))
4103 indx = elf_section_data (sym_sec->output_section)->dynindx;
4104 /* We are turning this relocation into one
4105 against a section symbol, so subtract out the
4106 output section's address but not the offset
4107 of the input section in the output section. */
4108 outrel.r_addend -= sym_sec->output_section->vma;
4111 outrel.r_info = ELF32_R_INFO (indx, r_type);
4113 #if 0
4114 /* EH info can cause unaligned DIR32 relocs.
4115 Tweak the reloc type for the dynamic linker. */
4116 if (r_type == R_PARISC_DIR32 && (outrel.r_offset & 3) != 0)
4117 outrel.r_info = ELF32_R_INFO (ELF32_R_SYM (outrel.r_info),
4118 R_PARISC_DIR32U);
4119 #endif
4120 sreloc = elf_section_data (input_section)->sreloc;
4121 if (sreloc == NULL)
4122 abort ();
4124 loc = (Elf32_External_Rela *) sreloc->contents;
4125 loc += sreloc->reloc_count++;
4126 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
4128 break;
4130 default:
4131 break;
4134 r = final_link_relocate (input_section, contents, rel, relocation,
4135 htab, sym_sec, h);
4137 if (r == bfd_reloc_ok)
4138 continue;
4140 if (h != NULL)
4141 sym_name = h->elf.root.root.string;
4142 else
4144 sym_name = bfd_elf_string_from_elf_section (input_bfd,
4145 symtab_hdr->sh_link,
4146 sym->st_name);
4147 if (sym_name == NULL)
4148 return false;
4149 if (*sym_name == '\0')
4150 sym_name = bfd_section_name (input_bfd, sym_sec);
4153 howto = elf_hppa_howto_table + r_type;
4155 if (r == bfd_reloc_undefined || r == bfd_reloc_notsupported)
4157 if (r == bfd_reloc_notsupported || !warned_undef)
4159 (*_bfd_error_handler)
4160 (_("%s(%s+0x%lx): cannot handle %s for %s"),
4161 bfd_archive_filename (input_bfd),
4162 input_section->name,
4163 (long) rel->r_offset,
4164 howto->name,
4165 sym_name);
4166 bfd_set_error (bfd_error_bad_value);
4167 return false;
4170 else
4172 if (!((*info->callbacks->reloc_overflow)
4173 (info, sym_name, howto->name, (bfd_vma) 0,
4174 input_bfd, input_section, rel->r_offset)))
4175 return false;
4179 return true;
4182 /* Finish up dynamic symbol handling. We set the contents of various
4183 dynamic sections here. */
4185 static boolean
4186 elf32_hppa_finish_dynamic_symbol (output_bfd, info, h, sym)
4187 bfd *output_bfd;
4188 struct bfd_link_info *info;
4189 struct elf_link_hash_entry *h;
4190 Elf_Internal_Sym *sym;
4192 struct elf32_hppa_link_hash_table *htab;
4194 htab = hppa_link_hash_table (info);
4196 if (h->plt.offset != (bfd_vma) -1)
4198 bfd_vma value;
4200 if (h->plt.offset & 1)
4201 abort ();
4203 /* This symbol has an entry in the procedure linkage table. Set
4204 it up.
4206 The format of a plt entry is
4207 <funcaddr>
4208 <__gp>
4210 value = 0;
4211 if (h->root.type == bfd_link_hash_defined
4212 || h->root.type == bfd_link_hash_defweak)
4214 value = h->root.u.def.value;
4215 if (h->root.u.def.section->output_section != NULL)
4216 value += (h->root.u.def.section->output_offset
4217 + h->root.u.def.section->output_section->vma);
4220 if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call)
4222 Elf_Internal_Rela rel;
4223 Elf32_External_Rela *loc;
4225 /* Create a dynamic IPLT relocation for this entry. */
4226 rel.r_offset = (h->plt.offset
4227 + htab->splt->output_offset
4228 + htab->splt->output_section->vma);
4229 if (h->dynindx != -1)
4231 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_IPLT);
4232 rel.r_addend = 0;
4234 else
4236 /* This symbol has been marked to become local, and is
4237 used by a plabel so must be kept in the .plt. */
4238 rel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
4239 rel.r_addend = value;
4242 loc = (Elf32_External_Rela *) htab->srelplt->contents;
4243 loc += htab->srelplt->reloc_count++;
4244 bfd_elf32_swap_reloca_out (htab->splt->output_section->owner,
4245 &rel, loc);
4247 else
4249 bfd_put_32 (htab->splt->owner,
4250 value,
4251 htab->splt->contents + h->plt.offset);
4252 bfd_put_32 (htab->splt->owner,
4253 elf_gp (htab->splt->output_section->owner),
4254 htab->splt->contents + h->plt.offset + 4);
4257 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4259 /* Mark the symbol as undefined, rather than as defined in
4260 the .plt section. Leave the value alone. */
4261 sym->st_shndx = SHN_UNDEF;
4265 if (h->got.offset != (bfd_vma) -1)
4267 Elf_Internal_Rela rel;
4268 Elf32_External_Rela *loc;
4270 /* This symbol has an entry in the global offset table. Set it
4271 up. */
4273 rel.r_offset = ((h->got.offset &~ (bfd_vma) 1)
4274 + htab->sgot->output_offset
4275 + htab->sgot->output_section->vma);
4277 /* If this is a -Bsymbolic link and the symbol is defined
4278 locally or was forced to be local because of a version file,
4279 we just want to emit a RELATIVE reloc. The entry in the
4280 global offset table will already have been initialized in the
4281 relocate_section function. */
4282 if (info->shared
4283 && (info->symbolic || h->dynindx == -1)
4284 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
4286 rel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
4287 rel.r_addend = (h->root.u.def.value
4288 + h->root.u.def.section->output_offset
4289 + h->root.u.def.section->output_section->vma);
4291 else
4293 if ((h->got.offset & 1) != 0)
4294 abort ();
4295 bfd_put_32 (output_bfd, (bfd_vma) 0,
4296 htab->sgot->contents + h->got.offset);
4297 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_DIR32);
4298 rel.r_addend = 0;
4301 loc = (Elf32_External_Rela *) htab->srelgot->contents;
4302 loc += htab->srelgot->reloc_count++;
4303 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
4306 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4308 asection *s;
4309 Elf_Internal_Rela rel;
4310 Elf32_External_Rela *loc;
4312 /* This symbol needs a copy reloc. Set it up. */
4314 if (! (h->dynindx != -1
4315 && (h->root.type == bfd_link_hash_defined
4316 || h->root.type == bfd_link_hash_defweak)))
4317 abort ();
4319 s = htab->srelbss;
4321 rel.r_offset = (h->root.u.def.value
4322 + h->root.u.def.section->output_offset
4323 + h->root.u.def.section->output_section->vma);
4324 rel.r_addend = 0;
4325 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_COPY);
4326 loc = (Elf32_External_Rela *) s->contents + s->reloc_count++;
4327 bfd_elf32_swap_reloca_out (output_bfd, &rel, loc);
4330 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4331 if (h->root.root.string[0] == '_'
4332 && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4333 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0))
4335 sym->st_shndx = SHN_ABS;
4338 return true;
4341 /* Used to decide how to sort relocs in an optimal manner for the
4342 dynamic linker, before writing them out. */
4344 static enum elf_reloc_type_class
4345 elf32_hppa_reloc_type_class (rela)
4346 const Elf_Internal_Rela *rela;
4348 if (ELF32_R_SYM (rela->r_info) == 0)
4349 return reloc_class_relative;
4351 switch ((int) ELF32_R_TYPE (rela->r_info))
4353 case R_PARISC_IPLT:
4354 return reloc_class_plt;
4355 case R_PARISC_COPY:
4356 return reloc_class_copy;
4357 default:
4358 return reloc_class_normal;
4362 /* Finish up the dynamic sections. */
4364 static boolean
4365 elf32_hppa_finish_dynamic_sections (output_bfd, info)
4366 bfd *output_bfd;
4367 struct bfd_link_info *info;
4369 bfd *dynobj;
4370 struct elf32_hppa_link_hash_table *htab;
4371 asection *sdyn;
4373 htab = hppa_link_hash_table (info);
4374 dynobj = htab->elf.dynobj;
4376 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4378 if (htab->elf.dynamic_sections_created)
4380 Elf32_External_Dyn *dyncon, *dynconend;
4382 if (sdyn == NULL)
4383 abort ();
4385 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4386 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4387 for (; dyncon < dynconend; dyncon++)
4389 Elf_Internal_Dyn dyn;
4390 asection *s;
4392 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4394 switch (dyn.d_tag)
4396 default:
4397 continue;
4399 case DT_PLTGOT:
4400 /* Use PLTGOT to set the GOT register. */
4401 dyn.d_un.d_ptr = elf_gp (output_bfd);
4402 break;
4404 case DT_JMPREL:
4405 s = htab->srelplt;
4406 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4407 break;
4409 case DT_PLTRELSZ:
4410 s = htab->srelplt;
4411 if (s->_cooked_size != 0)
4412 dyn.d_un.d_val = s->_cooked_size;
4413 else
4414 dyn.d_un.d_val = s->_raw_size;
4415 break;
4417 case DT_RELASZ:
4418 /* Don't count procedure linkage table relocs in the
4419 overall reloc count. */
4420 if (htab->srelplt != NULL)
4422 s = htab->srelplt->output_section;
4423 if (s->_cooked_size != 0)
4424 dyn.d_un.d_val -= s->_cooked_size;
4425 else
4426 dyn.d_un.d_val -= s->_raw_size;
4428 break;
4431 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4435 if (htab->sgot != NULL && htab->sgot->_raw_size != 0)
4437 /* Fill in the first entry in the global offset table.
4438 We use it to point to our dynamic section, if we have one. */
4439 bfd_put_32 (output_bfd,
4440 (sdyn != NULL
4441 ? sdyn->output_section->vma + sdyn->output_offset
4442 : (bfd_vma) 0),
4443 htab->sgot->contents);
4445 /* The second entry is reserved for use by the dynamic linker. */
4446 memset (htab->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
4448 /* Set .got entry size. */
4449 elf_section_data (htab->sgot->output_section)
4450 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
4453 if (htab->splt != NULL && htab->splt->_raw_size != 0)
4455 /* Set plt entry size. */
4456 elf_section_data (htab->splt->output_section)
4457 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
4459 if (htab->need_plt_stub)
4461 /* Set up the .plt stub. */
4462 memcpy (htab->splt->contents
4463 + htab->splt->_raw_size - sizeof (plt_stub),
4464 plt_stub, sizeof (plt_stub));
4466 if ((htab->splt->output_offset
4467 + htab->splt->output_section->vma
4468 + htab->splt->_raw_size)
4469 != (htab->sgot->output_offset
4470 + htab->sgot->output_section->vma))
4472 (*_bfd_error_handler)
4473 (_(".got section not immediately after .plt section"));
4474 return false;
4479 return true;
4482 /* Tweak the OSABI field of the elf header. */
4484 static void
4485 elf32_hppa_post_process_headers (abfd, link_info)
4486 bfd *abfd;
4487 struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
4489 Elf_Internal_Ehdr * i_ehdrp;
4491 i_ehdrp = elf_elfheader (abfd);
4493 if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0)
4495 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
4497 else
4499 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_HPUX;
4503 /* Called when writing out an object file to decide the type of a
4504 symbol. */
4505 static int
4506 elf32_hppa_elf_get_symbol_type (elf_sym, type)
4507 Elf_Internal_Sym *elf_sym;
4508 int type;
4510 if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI)
4511 return STT_PARISC_MILLI;
4512 else
4513 return type;
4516 /* Misc BFD support code. */
4517 #define bfd_elf32_bfd_is_local_label_name elf_hppa_is_local_label_name
4518 #define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
4519 #define elf_info_to_howto elf_hppa_info_to_howto
4520 #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel
4522 /* Stuff for the BFD linker. */
4523 #define bfd_elf32_bfd_final_link elf32_hppa_final_link
4524 #define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create
4525 #define bfd_elf32_bfd_link_hash_table_free elf32_hppa_link_hash_table_free
4526 #define elf_backend_add_symbol_hook elf32_hppa_add_symbol_hook
4527 #define elf_backend_adjust_dynamic_symbol elf32_hppa_adjust_dynamic_symbol
4528 #define elf_backend_copy_indirect_symbol elf32_hppa_copy_indirect_symbol
4529 #define elf_backend_check_relocs elf32_hppa_check_relocs
4530 #define elf_backend_create_dynamic_sections elf32_hppa_create_dynamic_sections
4531 #define elf_backend_fake_sections elf_hppa_fake_sections
4532 #define elf_backend_relocate_section elf32_hppa_relocate_section
4533 #define elf_backend_hide_symbol elf32_hppa_hide_symbol
4534 #define elf_backend_finish_dynamic_symbol elf32_hppa_finish_dynamic_symbol
4535 #define elf_backend_finish_dynamic_sections elf32_hppa_finish_dynamic_sections
4536 #define elf_backend_size_dynamic_sections elf32_hppa_size_dynamic_sections
4537 #define elf_backend_gc_mark_hook elf32_hppa_gc_mark_hook
4538 #define elf_backend_gc_sweep_hook elf32_hppa_gc_sweep_hook
4539 #define elf_backend_object_p elf32_hppa_object_p
4540 #define elf_backend_final_write_processing elf_hppa_final_write_processing
4541 #define elf_backend_post_process_headers elf32_hppa_post_process_headers
4542 #define elf_backend_get_symbol_type elf32_hppa_elf_get_symbol_type
4543 #define elf_backend_reloc_type_class elf32_hppa_reloc_type_class
4545 #define elf_backend_can_gc_sections 1
4546 #define elf_backend_can_refcount 1
4547 #define elf_backend_plt_alignment 2
4548 #define elf_backend_want_got_plt 0
4549 #define elf_backend_plt_readonly 0
4550 #define elf_backend_want_plt_sym 0
4551 #define elf_backend_got_header_size 8
4553 #define TARGET_BIG_SYM bfd_elf32_hppa_vec
4554 #define TARGET_BIG_NAME "elf32-hppa"
4555 #define ELF_ARCH bfd_arch_hppa
4556 #define ELF_MACHINE_CODE EM_PARISC
4557 #define ELF_MAXPAGESIZE 0x1000
4559 #include "elf32-target.h"
4561 #undef TARGET_BIG_SYM
4562 #define TARGET_BIG_SYM bfd_elf32_hppa_linux_vec
4563 #undef TARGET_BIG_NAME
4564 #define TARGET_BIG_NAME "elf32-hppa-linux"
4566 #define INCLUDED_TARGET_FILE 1
4567 #include "elf32-target.h"