Fixup checkin of wrong source
[deliverable/binutils-gdb.git] / bfd / elf32-hppa.c
1 /* BFD back-end for HP PA-RISC ELF files.
2 Copyright 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001
3 Free Software Foundation, Inc.
4
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>
10
11 This file is part of BFD, the Binary File Descriptor library.
12
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.
17
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.
22
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. */
26
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 "elf-hppa.h"
36 #include "elf32-hppa.h"
37
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:
41
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. */
48
49 /* We use two hash tables to hold information for linking PA ELF objects.
50
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.
54
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.
58
59 There are a number of different stubs generated by the linker.
60
61 Long branch stub:
62 : ldil LR'X,%r1
63 : be,n RR'X(%sr4,%r1)
64
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)
69
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.
76
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.
83
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
93
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
103
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 */
115
116 #define PLT_ENTRY_SIZE 8
117 #define PLABEL_PLT_ENTRY_SIZE PLT_ENTRY_SIZE
118 #define GOT_ENTRY_SIZE 4
119 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
120
121 static const bfd_byte plt_stub[] =
122 {
123 0x0e, 0x80, 0x10, 0x96, /* 1: ldw 0(%r20),%r22 */
124 0xea, 0xc0, 0xc0, 0x00, /* bv %r0(%r22) */
125 0x0e, 0x88, 0x10, 0x95, /* ldw 4(%r20),%r21 */
126 #define PLT_STUB_ENTRY (3*4)
127 0xea, 0x9f, 0x1f, 0xdd, /* b,l 1b,%r20 */
128 0xd6, 0x80, 0x1c, 0x1e, /* depi 0,31,2,%r20 */
129 0x00, 0xc0, 0xff, 0xee, /* 9: .word fixup_func */
130 0xde, 0xad, 0xbe, 0xef /* .word fixup_ltp */
131 };
132
133 /* Section name for stubs is the associated section name plus this
134 string. */
135 #define STUB_SUFFIX ".stub"
136
137 /* Setting the following non-zero makes all long branch stubs
138 generated during a shared link of the PIC variety. This saves on
139 relocs, but costs one extra instruction per stub. */
140 #ifndef LONG_BRANCH_PIC_IN_SHLIB
141 #define LONG_BRANCH_PIC_IN_SHLIB 1
142 #endif
143
144 /* Set this non-zero to use import stubs instead of long branch stubs
145 where a .plt entry exists for the symbol. This is a fairly useless
146 option as import stubs are bigger than PIC long branch stubs. */
147 #ifndef LONG_BRANCH_VIA_PLT
148 #define LONG_BRANCH_VIA_PLT 0
149 #endif
150
151 /* We don't need to copy any PC- or GP-relative dynamic relocs into a
152 shared object's dynamic section. */
153 #ifndef RELATIVE_DYNAMIC_RELOCS
154 #define RELATIVE_DYNAMIC_RELOCS 0
155 #endif
156
157 enum elf32_hppa_stub_type {
158 hppa_stub_long_branch,
159 hppa_stub_long_branch_shared,
160 hppa_stub_import,
161 hppa_stub_import_shared,
162 hppa_stub_export,
163 hppa_stub_none
164 };
165
166 struct elf32_hppa_stub_hash_entry {
167
168 /* Base hash table entry structure. */
169 struct bfd_hash_entry root;
170
171 /* The stub section. */
172 asection *stub_sec;
173
174 #if ! LONG_BRANCH_PIC_IN_SHLIB
175 /* It's associated reloc section. */
176 asection *reloc_sec;
177 #endif
178
179 /* Offset within stub_sec of the beginning of this stub. */
180 bfd_vma stub_offset;
181
182 /* Given the symbol's value and its section we can determine its final
183 value when building the stubs (so the stub knows where to jump. */
184 bfd_vma target_value;
185 asection *target_section;
186
187 enum elf32_hppa_stub_type stub_type;
188
189 /* The symbol table entry, if any, that this was derived from. */
190 struct elf32_hppa_link_hash_entry *h;
191
192 /* Where this stub is being called from, or, in the case of combined
193 stub sections, the first input section in the group. */
194 asection *id_sec;
195 };
196
197 struct elf32_hppa_link_hash_entry {
198
199 struct elf_link_hash_entry elf;
200
201 /* A pointer to the most recently used stub hash entry against this
202 symbol. */
203 struct elf32_hppa_stub_hash_entry *stub_cache;
204
205 #if ! LONG_BRANCH_PIC_IN_SHLIB
206 /* Used to track whether we have allocated space for a long branch
207 stub relocation for this symbol in the given section. */
208 asection *stub_reloc_sec;
209 #endif
210
211 #if ! LONG_BRANCH_PIC_IN_SHLIB || RELATIVE_DYNAMIC_RELOCS
212 /* Used to count relocations for delayed sizing of relocation
213 sections. */
214 struct elf32_hppa_dyn_reloc_entry {
215
216 /* Next relocation in the chain. */
217 struct elf32_hppa_dyn_reloc_entry *next;
218
219 /* The section in dynobj. */
220 asection *section;
221
222 /* Number of relocs copied in this section. */
223 bfd_size_type count;
224 } *reloc_entries;
225 #endif
226
227 /* Set during a static link if we detect a function is PIC. */
228 unsigned int pic_call:1;
229
230 /* Set if this symbol is used by a plabel reloc. */
231 unsigned int plabel:1;
232
233 /* Set if this symbol is an init or fini function and thus should
234 use an absolute reloc. */
235 unsigned int plt_abs:1;
236 };
237
238 struct elf32_hppa_link_hash_table {
239
240 /* The main hash table. */
241 struct elf_link_hash_table root;
242
243 /* The stub hash table. */
244 struct bfd_hash_table stub_hash_table;
245
246 /* Linker stub bfd. */
247 bfd *stub_bfd;
248
249 /* Linker call-backs. */
250 asection * (*add_stub_section) PARAMS ((const char *, asection *));
251 void (*layout_sections_again) PARAMS ((void));
252
253 /* Array to keep track of which stub sections have been created, and
254 information on stub grouping. */
255 struct map_stub {
256 /* This is the section to which stubs in the group will be
257 attached. */
258 asection *link_sec;
259 /* The stub section. */
260 asection *stub_sec;
261 #if ! LONG_BRANCH_PIC_IN_SHLIB
262 /* The stub section's reloc section. */
263 asection *reloc_sec;
264 #endif
265 } *stub_group;
266
267 /* Short-cuts to get to dynamic linker sections. */
268 asection *sgot;
269 asection *srelgot;
270 asection *splt;
271 asection *srelplt;
272 asection *sdynbss;
273 asection *srelbss;
274
275 /* Used during a final link to store the base of the text and data
276 segments so that we can perform SEGREL relocations. */
277 bfd_vma text_segment_base;
278 bfd_vma data_segment_base;
279
280 /* Whether we support multiple sub-spaces for shared libs. */
281 unsigned int multi_subspace:1;
282
283 /* Flags set when PCREL12F and PCREL17F branches detected. Used to
284 select suitable defaults for the stub group size. */
285 unsigned int has_12bit_branch:1;
286 unsigned int has_17bit_branch:1;
287
288 /* Set if we need a .plt stub to support lazy dynamic linking. */
289 unsigned int need_plt_stub:1;
290 };
291
292 /* Various hash macros and functions. */
293 #define hppa_link_hash_table(p) \
294 ((struct elf32_hppa_link_hash_table *) ((p)->hash))
295
296 #define hppa_stub_hash_lookup(table, string, create, copy) \
297 ((struct elf32_hppa_stub_hash_entry *) \
298 bfd_hash_lookup ((table), (string), (create), (copy)))
299
300 static struct bfd_hash_entry *stub_hash_newfunc
301 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
302
303 static struct bfd_hash_entry *hppa_link_hash_newfunc
304 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
305
306 static struct bfd_link_hash_table *elf32_hppa_link_hash_table_create
307 PARAMS ((bfd *));
308
309 /* Stub handling functions. */
310 static char *hppa_stub_name
311 PARAMS ((const asection *, const asection *,
312 const struct elf32_hppa_link_hash_entry *,
313 const Elf_Internal_Rela *));
314
315 static struct elf32_hppa_stub_hash_entry *hppa_get_stub_entry
316 PARAMS ((const asection *, const asection *,
317 struct elf32_hppa_link_hash_entry *,
318 const Elf_Internal_Rela *,
319 struct elf32_hppa_link_hash_table *));
320
321 static struct elf32_hppa_stub_hash_entry *hppa_add_stub
322 PARAMS ((const char *, asection *, struct elf32_hppa_link_hash_table *));
323
324 static enum elf32_hppa_stub_type hppa_type_of_stub
325 PARAMS ((asection *, const Elf_Internal_Rela *,
326 struct elf32_hppa_link_hash_entry *, bfd_vma));
327
328 static boolean hppa_build_one_stub
329 PARAMS ((struct bfd_hash_entry *, PTR));
330
331 static boolean hppa_size_one_stub
332 PARAMS ((struct bfd_hash_entry *, PTR));
333
334 /* BFD and elf backend functions. */
335 static boolean elf32_hppa_object_p PARAMS ((bfd *));
336
337 static boolean elf32_hppa_add_symbol_hook
338 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
339 const char **, flagword *, asection **, bfd_vma *));
340
341 static boolean elf32_hppa_create_dynamic_sections
342 PARAMS ((bfd *, struct bfd_link_info *));
343
344 static boolean elf32_hppa_check_relocs
345 PARAMS ((bfd *, struct bfd_link_info *,
346 asection *, const Elf_Internal_Rela *));
347
348 static asection *elf32_hppa_gc_mark_hook
349 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
350 struct elf_link_hash_entry *, Elf_Internal_Sym *));
351
352 static boolean elf32_hppa_gc_sweep_hook
353 PARAMS ((bfd *, struct bfd_link_info *,
354 asection *, const Elf_Internal_Rela *));
355
356 static void elf32_hppa_hide_symbol
357 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
358
359 static boolean elf32_hppa_adjust_dynamic_symbol
360 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
361
362 static boolean hppa_handle_PIC_calls
363 PARAMS ((struct elf_link_hash_entry *, PTR));
364
365 #if ((! LONG_BRANCH_PIC_IN_SHLIB && LONG_BRANCH_VIA_PLT) \
366 || RELATIVE_DYNAMIC_RELOCS)
367 static boolean hppa_discard_copies
368 PARAMS ((struct elf_link_hash_entry *, PTR));
369 #endif
370
371 static boolean clobber_millicode_symbols
372 PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *));
373
374 static boolean elf32_hppa_size_dynamic_sections
375 PARAMS ((bfd *, struct bfd_link_info *));
376
377 static boolean elf32_hppa_final_link
378 PARAMS ((bfd *, struct bfd_link_info *));
379
380 static void hppa_record_segment_addr
381 PARAMS ((bfd *, asection *, PTR));
382
383 static bfd_reloc_status_type final_link_relocate
384 PARAMS ((asection *, bfd_byte *, const Elf_Internal_Rela *,
385 bfd_vma, struct elf32_hppa_link_hash_table *, asection *,
386 struct elf32_hppa_link_hash_entry *));
387
388 static boolean elf32_hppa_relocate_section
389 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
390 bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
391
392 static int hppa_unwind_entry_compare
393 PARAMS ((const PTR, const PTR));
394
395 static boolean elf32_hppa_finish_dynamic_symbol
396 PARAMS ((bfd *, struct bfd_link_info *,
397 struct elf_link_hash_entry *, Elf_Internal_Sym *));
398
399 static boolean elf32_hppa_finish_dynamic_sections
400 PARAMS ((bfd *, struct bfd_link_info *));
401
402 static void elf32_hppa_post_process_headers
403 PARAMS ((bfd *, struct bfd_link_info *));
404
405 static int elf32_hppa_elf_get_symbol_type
406 PARAMS ((Elf_Internal_Sym *, int));
407
408 /* Assorted hash table functions. */
409
410 /* Initialize an entry in the stub hash table. */
411
412 static struct bfd_hash_entry *
413 stub_hash_newfunc (entry, table, string)
414 struct bfd_hash_entry *entry;
415 struct bfd_hash_table *table;
416 const char *string;
417 {
418 struct elf32_hppa_stub_hash_entry *ret;
419
420 ret = (struct elf32_hppa_stub_hash_entry *) entry;
421
422 /* Allocate the structure if it has not already been allocated by a
423 subclass. */
424 if (ret == NULL)
425 {
426 ret = ((struct elf32_hppa_stub_hash_entry *)
427 bfd_hash_allocate (table,
428 sizeof (struct elf32_hppa_stub_hash_entry)));
429 if (ret == NULL)
430 return NULL;
431 }
432
433 /* Call the allocation method of the superclass. */
434 ret = ((struct elf32_hppa_stub_hash_entry *)
435 bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
436
437 if (ret)
438 {
439 /* Initialize the local fields. */
440 ret->stub_sec = NULL;
441 #if ! LONG_BRANCH_PIC_IN_SHLIB
442 ret->reloc_sec = NULL;
443 #endif
444 ret->stub_offset = 0;
445 ret->target_value = 0;
446 ret->target_section = NULL;
447 ret->stub_type = hppa_stub_long_branch;
448 ret->h = NULL;
449 ret->id_sec = NULL;
450 }
451
452 return (struct bfd_hash_entry *) ret;
453 }
454
455 /* Initialize an entry in the link hash table. */
456
457 static struct bfd_hash_entry *
458 hppa_link_hash_newfunc (entry, table, string)
459 struct bfd_hash_entry *entry;
460 struct bfd_hash_table *table;
461 const char *string;
462 {
463 struct elf32_hppa_link_hash_entry *ret;
464
465 ret = (struct elf32_hppa_link_hash_entry *) entry;
466
467 /* Allocate the structure if it has not already been allocated by a
468 subclass. */
469 if (ret == NULL)
470 {
471 ret = ((struct elf32_hppa_link_hash_entry *)
472 bfd_hash_allocate (table,
473 sizeof (struct elf32_hppa_link_hash_entry)));
474 if (ret == NULL)
475 return NULL;
476 }
477
478 /* Call the allocation method of the superclass. */
479 ret = ((struct elf32_hppa_link_hash_entry *)
480 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
481 table, string));
482
483 if (ret)
484 {
485 /* Initialize the local fields. */
486 #if ! LONG_BRANCH_PIC_IN_SHLIB
487 ret->stub_reloc_sec = NULL;
488 #endif
489 ret->stub_cache = NULL;
490 #if ! LONG_BRANCH_PIC_IN_SHLIB || RELATIVE_DYNAMIC_RELOCS
491 ret->reloc_entries = NULL;
492 #endif
493 ret->pic_call = 0;
494 ret->plabel = 0;
495 ret->plt_abs = 0;
496 }
497
498 return (struct bfd_hash_entry *) ret;
499 }
500
501 /* Create the derived linker hash table. The PA ELF port uses the derived
502 hash table to keep information specific to the PA ELF linker (without
503 using static variables). */
504
505 static struct bfd_link_hash_table *
506 elf32_hppa_link_hash_table_create (abfd)
507 bfd *abfd;
508 {
509 struct elf32_hppa_link_hash_table *ret;
510
511 ret = ((struct elf32_hppa_link_hash_table *) bfd_alloc (abfd, sizeof (*ret)));
512 if (ret == NULL)
513 return NULL;
514
515 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, hppa_link_hash_newfunc))
516 {
517 bfd_release (abfd, ret);
518 return NULL;
519 }
520
521 /* Init the stub hash table too. */
522 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc))
523 return NULL;
524
525 ret->stub_bfd = NULL;
526 ret->add_stub_section = NULL;
527 ret->layout_sections_again = NULL;
528 ret->stub_group = NULL;
529 ret->sgot = NULL;
530 ret->srelgot = NULL;
531 ret->splt = NULL;
532 ret->srelplt = NULL;
533 ret->sdynbss = NULL;
534 ret->srelbss = NULL;
535 ret->text_segment_base = (bfd_vma) -1;
536 ret->data_segment_base = (bfd_vma) -1;
537 ret->multi_subspace = 0;
538 ret->has_12bit_branch = 0;
539 ret->has_17bit_branch = 0;
540 ret->need_plt_stub = 0;
541
542 return &ret->root.root;
543 }
544
545 /* Build a name for an entry in the stub hash table. */
546
547 static char *
548 hppa_stub_name (input_section, sym_sec, hash, rel)
549 const asection *input_section;
550 const asection *sym_sec;
551 const struct elf32_hppa_link_hash_entry *hash;
552 const Elf_Internal_Rela *rel;
553 {
554 char *stub_name;
555 size_t len;
556
557 if (hash)
558 {
559 len = 8 + 1 + strlen (hash->elf.root.root.string) + 1 + 8 + 1;
560 stub_name = bfd_malloc (len);
561 if (stub_name != NULL)
562 {
563 sprintf (stub_name, "%08x_%s+%x",
564 input_section->id & 0xffffffff,
565 hash->elf.root.root.string,
566 (int) rel->r_addend & 0xffffffff);
567 }
568 }
569 else
570 {
571 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
572 stub_name = bfd_malloc (len);
573 if (stub_name != NULL)
574 {
575 sprintf (stub_name, "%08x_%x:%x+%x",
576 input_section->id & 0xffffffff,
577 sym_sec->id & 0xffffffff,
578 (int) ELF32_R_SYM (rel->r_info) & 0xffffffff,
579 (int) rel->r_addend & 0xffffffff);
580 }
581 }
582 return stub_name;
583 }
584
585 /* Look up an entry in the stub hash. Stub entries are cached because
586 creating the stub name takes a bit of time. */
587
588 static struct elf32_hppa_stub_hash_entry *
589 hppa_get_stub_entry (input_section, sym_sec, hash, rel, hplink)
590 const asection *input_section;
591 const asection *sym_sec;
592 struct elf32_hppa_link_hash_entry *hash;
593 const Elf_Internal_Rela *rel;
594 struct elf32_hppa_link_hash_table *hplink;
595 {
596 struct elf32_hppa_stub_hash_entry *stub_entry;
597 const asection *id_sec;
598
599 /* If this input section is part of a group of sections sharing one
600 stub section, then use the id of the first section in the group.
601 Stub names need to include a section id, as there may well be
602 more than one stub used to reach say, printf, and we need to
603 distinguish between them. */
604 id_sec = hplink->stub_group[input_section->id].link_sec;
605
606 if (hash != NULL && hash->stub_cache != NULL
607 && hash->stub_cache->h == hash
608 && hash->stub_cache->id_sec == id_sec)
609 {
610 stub_entry = hash->stub_cache;
611 }
612 else
613 {
614 char *stub_name;
615
616 stub_name = hppa_stub_name (id_sec, sym_sec, hash, rel);
617 if (stub_name == NULL)
618 return NULL;
619
620 stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table,
621 stub_name, false, false);
622 if (stub_entry == NULL)
623 {
624 if (hash == NULL || hash->elf.root.type != bfd_link_hash_undefweak)
625 (*_bfd_error_handler) (_("%s(%s+0x%lx): cannot find stub entry %s"),
626 bfd_get_filename (input_section->owner),
627 input_section->name,
628 (long) rel->r_offset,
629 stub_name);
630 }
631 else
632 {
633 if (hash != NULL)
634 hash->stub_cache = stub_entry;
635 }
636
637 free (stub_name);
638 }
639
640 return stub_entry;
641 }
642
643 /* Add a new stub entry to the stub hash. Not all fields of the new
644 stub entry are initialised. */
645
646 static struct elf32_hppa_stub_hash_entry *
647 hppa_add_stub (stub_name, section, hplink)
648 const char *stub_name;
649 asection *section;
650 struct elf32_hppa_link_hash_table *hplink;
651 {
652 asection *link_sec;
653 asection *stub_sec;
654 struct elf32_hppa_stub_hash_entry *stub_entry;
655
656 link_sec = hplink->stub_group[section->id].link_sec;
657 stub_sec = hplink->stub_group[section->id].stub_sec;
658 if (stub_sec == NULL)
659 {
660 stub_sec = hplink->stub_group[link_sec->id].stub_sec;
661 if (stub_sec == NULL)
662 {
663 size_t len;
664 char *s_name;
665
666 len = strlen (link_sec->name) + sizeof (STUB_SUFFIX);
667 s_name = bfd_alloc (hplink->stub_bfd, len);
668 if (s_name == NULL)
669 return NULL;
670
671 strcpy (s_name, link_sec->name);
672 strcpy (s_name + len - sizeof (STUB_SUFFIX), STUB_SUFFIX);
673 stub_sec = (*hplink->add_stub_section) (s_name, link_sec);
674 if (stub_sec == NULL)
675 return NULL;
676 hplink->stub_group[link_sec->id].stub_sec = stub_sec;
677 }
678 hplink->stub_group[section->id].stub_sec = stub_sec;
679 }
680
681 /* Enter this entry into the linker stub hash table. */
682 stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table, stub_name,
683 true, false);
684 if (stub_entry == NULL)
685 {
686 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
687 bfd_get_filename (section->owner),
688 stub_name);
689 return NULL;
690 }
691
692 stub_entry->stub_sec = stub_sec;
693 #if ! LONG_BRANCH_PIC_IN_SHLIB
694 stub_entry->reloc_sec = hplink->stub_group[section->id].reloc_sec;
695 #endif
696 stub_entry->stub_offset = 0;
697 stub_entry->id_sec = link_sec;
698 return stub_entry;
699 }
700
701 /* Determine the type of stub needed, if any, for a call. */
702
703 static enum elf32_hppa_stub_type
704 hppa_type_of_stub (input_sec, rel, hash, destination)
705 asection *input_sec;
706 const Elf_Internal_Rela *rel;
707 struct elf32_hppa_link_hash_entry *hash;
708 bfd_vma destination;
709 {
710 bfd_vma location;
711 bfd_vma branch_offset;
712 bfd_vma max_branch_offset;
713 unsigned int r_type;
714
715 if (hash != NULL
716 && (((hash->elf.root.type == bfd_link_hash_defined
717 || hash->elf.root.type == bfd_link_hash_defweak)
718 && hash->elf.root.u.def.section->output_section == NULL)
719 || (hash->elf.root.type == bfd_link_hash_defweak
720 && hash->elf.dynindx != -1
721 && hash->elf.plt.offset != (bfd_vma) -1)
722 || hash->elf.root.type == bfd_link_hash_undefweak
723 || hash->elf.root.type == bfd_link_hash_undefined
724 || hash->pic_call))
725 {
726 /* If output_section is NULL, then it's a symbol defined in a
727 shared library. We will need an import stub. Decide between
728 hppa_stub_import and hppa_stub_import_shared later. For
729 shared links we need stubs for undefined or weak syms too;
730 They will presumably be resolved by the dynamic linker. */
731 return hppa_stub_import;
732 }
733
734 /* Determine where the call point is. */
735 location = (input_sec->output_offset
736 + input_sec->output_section->vma
737 + rel->r_offset);
738
739 branch_offset = destination - location - 8;
740 r_type = ELF32_R_TYPE (rel->r_info);
741
742 /* Determine if a long branch stub is needed. parisc branch offsets
743 are relative to the second instruction past the branch, ie. +8
744 bytes on from the branch instruction location. The offset is
745 signed and counts in units of 4 bytes. */
746 if (r_type == (unsigned int) R_PARISC_PCREL17F)
747 {
748 max_branch_offset = (1 << (17-1)) << 2;
749 }
750 else if (r_type == (unsigned int) R_PARISC_PCREL12F)
751 {
752 max_branch_offset = (1 << (12-1)) << 2;
753 }
754 else /* R_PARISC_PCREL22F. */
755 {
756 max_branch_offset = (1 << (22-1)) << 2;
757 }
758
759 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
760 {
761 #if LONG_BRANCH_VIA_PLT
762 if (hash != NULL
763 && hash->elf.dynindx != -1
764 && hash->elf.plt.offset != (bfd_vma) -1)
765 {
766 /* If we are doing a shared link and find we need a long
767 branch stub, then go via the .plt if possible. */
768 return hppa_stub_import;
769 }
770 else
771 #endif
772 return hppa_stub_long_branch;
773 }
774 return hppa_stub_none;
775 }
776
777 /* Build one linker stub as defined by the stub hash table entry GEN_ENTRY.
778 IN_ARG contains the link info pointer. */
779
780 #define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */
781 #define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */
782
783 #define BL_R1 0xe8200000 /* b,l .+8,%r1 */
784 #define ADDIL_R1 0x28200000 /* addil LR'XXX,%r1,%r1 */
785 #define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */
786
787 #define ADDIL_DP 0x2b600000 /* addil LR'XXX,%dp,%r1 */
788 #define LDW_R1_R21 0x48350000 /* ldw RR'XXX(%sr0,%r1),%r21 */
789 #define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */
790 #define LDW_R1_R19 0x48330000 /* ldw RR'XXX(%sr0,%r1),%r19 */
791
792 #define ADDIL_R19 0x2a600000 /* addil LR'XXX,%r19,%r1 */
793 #define LDW_R1_DP 0x483b0000 /* ldw RR'XXX(%sr0,%r1),%dp */
794
795 #define LDSID_R21_R1 0x02a010a1 /* ldsid (%sr0,%r21),%r1 */
796 #define MTSP_R1 0x00011820 /* mtsp %r1,%sr0 */
797 #define BE_SR0_R21 0xe2a00000 /* be 0(%sr0,%r21) */
798 #define STW_RP 0x6bc23fd1 /* stw %rp,-24(%sr0,%sp) */
799
800 #define BL_RP 0xe8400002 /* b,l,n XXX,%rp */
801 #define NOP 0x08000240 /* nop */
802 #define LDW_RP 0x4bc23fd1 /* ldw -24(%sr0,%sp),%rp */
803 #define LDSID_RP_R1 0x004010a1 /* ldsid (%sr0,%rp),%r1 */
804 #define BE_SR0_RP 0xe0400002 /* be,n 0(%sr0,%rp) */
805
806 #ifndef R19_STUBS
807 #define R19_STUBS 1
808 #endif
809
810 #if R19_STUBS
811 #define LDW_R1_DLT LDW_R1_R19
812 #else
813 #define LDW_R1_DLT LDW_R1_DP
814 #endif
815
816 static boolean
817 hppa_build_one_stub (gen_entry, in_arg)
818 struct bfd_hash_entry *gen_entry;
819 PTR in_arg;
820 {
821 struct elf32_hppa_stub_hash_entry *stub_entry;
822 struct bfd_link_info *info;
823 struct elf32_hppa_link_hash_table *hplink;
824 asection *stub_sec;
825 bfd *stub_bfd;
826 bfd_byte *loc;
827 bfd_vma sym_value;
828 bfd_vma insn;
829 int val;
830 int size;
831
832 /* Massage our args to the form they really have. */
833 stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
834 info = (struct bfd_link_info *) in_arg;
835
836 hplink = hppa_link_hash_table (info);
837 stub_sec = stub_entry->stub_sec;
838
839 /* Make a note of the offset within the stubs for this entry. */
840 stub_entry->stub_offset = stub_sec->_raw_size;
841 loc = stub_sec->contents + stub_entry->stub_offset;
842
843 stub_bfd = stub_sec->owner;
844
845 switch (stub_entry->stub_type)
846 {
847 case hppa_stub_long_branch:
848 /* Create the long branch. A long branch is formed with "ldil"
849 loading the upper bits of the target address into a register,
850 then branching with "be" which adds in the lower bits.
851 The "be" has its delay slot nullified. */
852 sym_value = (stub_entry->target_value
853 + stub_entry->target_section->output_offset
854 + stub_entry->target_section->output_section->vma);
855
856 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel);
857 insn = hppa_rebuild_insn ((int) LDIL_R1, val, 21);
858 bfd_put_32 (stub_bfd, insn, loc);
859
860 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel) >> 2;
861 insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
862 bfd_put_32 (stub_bfd, insn, loc + 4);
863
864 #if ! LONG_BRANCH_PIC_IN_SHLIB
865 if (info->shared)
866 {
867 /* Output a dynamic relocation for this stub. We only
868 output one PCREL21L reloc per stub, trusting that the
869 dynamic linker will also fix the implied PCREL17R for the
870 second instruction. PCREL21L dynamic relocs had better
871 never be emitted for some other purpose... */
872 asection *srel;
873 Elf_Internal_Rela outrel;
874
875 if (stub_entry->h == NULL)
876 {
877 (*_bfd_error_handler)
878 (_("%s(%s+0x%lx): cannot relocate %s, recompile with -ffunction-sections"),
879 bfd_get_filename (stub_entry->target_section->owner),
880 stub_sec->name,
881 (long) stub_entry->stub_offset,
882 stub_entry->root.string);
883 bfd_set_error (bfd_error_bad_value);
884 return false;
885 }
886
887 srel = stub_entry->reloc_sec;
888 if (srel == NULL)
889 {
890 (*_bfd_error_handler)
891 (_("Could not find relocation section for %s"),
892 stub_sec->name);
893 bfd_set_error (bfd_error_bad_value);
894 return false;
895 }
896
897 outrel.r_offset = (stub_entry->stub_offset
898 + stub_sec->output_offset
899 + stub_sec->output_section->vma);
900 outrel.r_info = ELF32_R_INFO (0, R_PARISC_PCREL21L);
901 outrel.r_addend = sym_value;
902 bfd_elf32_swap_reloca_out (stub_sec->output_section->owner,
903 &outrel,
904 ((Elf32_External_Rela *)
905 srel->contents + srel->reloc_count));
906 ++srel->reloc_count;
907 }
908 #endif
909 size = 8;
910 break;
911
912 case hppa_stub_long_branch_shared:
913 /* Branches are relative. This is where we are going to. */
914 sym_value = (stub_entry->target_value
915 + stub_entry->target_section->output_offset
916 + stub_entry->target_section->output_section->vma);
917
918 /* And this is where we are coming from, more or less. */
919 sym_value -= (stub_entry->stub_offset
920 + stub_sec->output_offset
921 + stub_sec->output_section->vma);
922
923 bfd_put_32 (stub_bfd, (bfd_vma) BL_R1, loc);
924 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_lrsel);
925 insn = hppa_rebuild_insn ((int) ADDIL_R1, val, 21);
926 bfd_put_32 (stub_bfd, insn, loc + 4);
927
928 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_rrsel) >> 2;
929 insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
930 bfd_put_32 (stub_bfd, insn, loc + 8);
931 size = 12;
932 break;
933
934 case hppa_stub_import:
935 case hppa_stub_import_shared:
936 sym_value = (stub_entry->h->elf.plt.offset
937 + hplink->splt->output_offset
938 + hplink->splt->output_section->vma
939 - elf_gp (hplink->splt->output_section->owner));
940
941 insn = ADDIL_DP;
942 #if R19_STUBS
943 if (stub_entry->stub_type == hppa_stub_import_shared)
944 insn = ADDIL_R19;
945 #endif
946 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel),
947 insn = hppa_rebuild_insn ((int) insn, val, 21);
948 bfd_put_32 (stub_bfd, insn, loc);
949
950 /* It is critical to use lrsel/rrsel here because we are using
951 two different offsets (+0 and +4) from sym_value. If we use
952 lsel/rsel then with unfortunate sym_values we will round
953 sym_value+4 up to the next 2k block leading to a mis-match
954 between the lsel and rsel value. */
955 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel);
956 insn = hppa_rebuild_insn ((int) LDW_R1_R21, val, 14);
957 bfd_put_32 (stub_bfd, insn, loc + 4);
958
959 if (hplink->multi_subspace)
960 {
961 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
962 insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
963 bfd_put_32 (stub_bfd, insn, loc + 8);
964
965 bfd_put_32 (stub_bfd, (bfd_vma) LDSID_R21_R1, loc + 12);
966 bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
967 bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_R21, loc + 20);
968 bfd_put_32 (stub_bfd, (bfd_vma) STW_RP, loc + 24);
969
970 size = 28;
971 }
972 else
973 {
974 bfd_put_32 (stub_bfd, (bfd_vma) BV_R0_R21, loc + 8);
975 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
976 insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
977 bfd_put_32 (stub_bfd, insn, loc + 12);
978
979 size = 16;
980 }
981
982 if (!info->shared
983 && stub_entry->h != NULL
984 && stub_entry->h->pic_call)
985 {
986 /* Build the .plt entry needed to call a PIC function from
987 statically linked code. We don't need any relocs. */
988 bfd *dynobj;
989 struct elf32_hppa_link_hash_entry *eh;
990 bfd_vma value;
991
992 dynobj = hplink->root.dynobj;
993 eh = (struct elf32_hppa_link_hash_entry *) stub_entry->h;
994
995 BFD_ASSERT (eh->elf.root.type == bfd_link_hash_defined
996 || eh->elf.root.type == bfd_link_hash_defweak);
997
998 value = (eh->elf.root.u.def.value
999 + eh->elf.root.u.def.section->output_offset
1000 + eh->elf.root.u.def.section->output_section->vma);
1001
1002 /* Fill in the entry in the procedure linkage table.
1003
1004 The format of a plt entry is
1005 <funcaddr>
1006 <__gp>. */
1007
1008 bfd_put_32 (hplink->splt->owner, value,
1009 hplink->splt->contents + eh->elf.plt.offset);
1010 value = elf_gp (hplink->splt->output_section->owner);
1011 bfd_put_32 (hplink->splt->owner, value,
1012 hplink->splt->contents + eh->elf.plt.offset + 4);
1013 }
1014 break;
1015
1016 case hppa_stub_export:
1017 /* Branches are relative. This is where we are going to. */
1018 sym_value = (stub_entry->target_value
1019 + stub_entry->target_section->output_offset
1020 + stub_entry->target_section->output_section->vma);
1021
1022 /* And this is where we are coming from. */
1023 sym_value -= (stub_entry->stub_offset
1024 + stub_sec->output_offset
1025 + stub_sec->output_section->vma);
1026
1027 if (sym_value - 8 + 0x40000 >= 0x80000)
1028 {
1029 (*_bfd_error_handler)
1030 (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
1031 bfd_get_filename (stub_entry->target_section->owner),
1032 stub_sec->name,
1033 (long) stub_entry->stub_offset,
1034 stub_entry->root.string);
1035 bfd_set_error (bfd_error_bad_value);
1036 return false;
1037 }
1038
1039 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_fsel) >> 2;
1040 insn = hppa_rebuild_insn ((int) BL_RP, val, 17);
1041 bfd_put_32 (stub_bfd, insn, loc);
1042
1043 bfd_put_32 (stub_bfd, (bfd_vma) NOP, loc + 4);
1044 bfd_put_32 (stub_bfd, (bfd_vma) LDW_RP, loc + 8);
1045 bfd_put_32 (stub_bfd, (bfd_vma) LDSID_RP_R1, loc + 12);
1046 bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
1047 bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_RP, loc + 20);
1048
1049 /* Point the function symbol at the stub. */
1050 stub_entry->h->elf.root.u.def.section = stub_sec;
1051 stub_entry->h->elf.root.u.def.value = stub_sec->_raw_size;
1052
1053 size = 24;
1054 break;
1055
1056 default:
1057 BFD_FAIL ();
1058 return false;
1059 }
1060
1061 stub_sec->_raw_size += size;
1062 return true;
1063 }
1064
1065 #undef LDIL_R1
1066 #undef BE_SR4_R1
1067 #undef BL_R1
1068 #undef ADDIL_R1
1069 #undef DEPI_R1
1070 #undef ADDIL_DP
1071 #undef LDW_R1_R21
1072 #undef LDW_R1_DLT
1073 #undef LDW_R1_R19
1074 #undef ADDIL_R19
1075 #undef LDW_R1_DP
1076 #undef LDSID_R21_R1
1077 #undef MTSP_R1
1078 #undef BE_SR0_R21
1079 #undef STW_RP
1080 #undef BV_R0_R21
1081 #undef BL_RP
1082 #undef NOP
1083 #undef LDW_RP
1084 #undef LDSID_RP_R1
1085 #undef BE_SR0_RP
1086
1087 /* As above, but don't actually build the stub. Just bump offset so
1088 we know stub section sizes. */
1089
1090 static boolean
1091 hppa_size_one_stub (gen_entry, in_arg)
1092 struct bfd_hash_entry *gen_entry;
1093 PTR in_arg;
1094 {
1095 struct elf32_hppa_stub_hash_entry *stub_entry;
1096 struct elf32_hppa_link_hash_table *hplink;
1097 int size;
1098
1099 /* Massage our args to the form they really have. */
1100 stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
1101 hplink = (struct elf32_hppa_link_hash_table *) in_arg;
1102
1103 if (stub_entry->stub_type == hppa_stub_long_branch)
1104 {
1105 #if ! LONG_BRANCH_PIC_IN_SHLIB
1106 if (stub_entry->reloc_sec != NULL)
1107 stub_entry->reloc_sec->_raw_size += sizeof (Elf32_External_Rela);
1108 #endif
1109 size = 8;
1110 }
1111 else if (stub_entry->stub_type == hppa_stub_long_branch_shared)
1112 size = 12;
1113 else if (stub_entry->stub_type == hppa_stub_export)
1114 size = 24;
1115 else /* hppa_stub_import or hppa_stub_import_shared. */
1116 {
1117 if (hplink->multi_subspace)
1118 size = 28;
1119 else
1120 size = 16;
1121 }
1122
1123 stub_entry->stub_sec->_raw_size += size;
1124 return true;
1125 }
1126
1127 /* Return nonzero if ABFD represents an HPPA ELF32 file.
1128 Additionally we set the default architecture and machine. */
1129
1130 static boolean
1131 elf32_hppa_object_p (abfd)
1132 bfd *abfd;
1133 {
1134 unsigned int flags = elf_elfheader (abfd)->e_flags;
1135
1136 switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE))
1137 {
1138 case EFA_PARISC_1_0:
1139 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10);
1140 case EFA_PARISC_1_1:
1141 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11);
1142 case EFA_PARISC_2_0:
1143 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20);
1144 case EFA_PARISC_2_0 | EF_PARISC_WIDE:
1145 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25);
1146 }
1147 return true;
1148 }
1149
1150 /* Undo the generic ELF code's subtraction of section->vma from the
1151 value of each external symbol. */
1152
1153 static boolean
1154 elf32_hppa_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
1155 bfd *abfd ATTRIBUTE_UNUSED;
1156 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1157 const Elf_Internal_Sym *sym ATTRIBUTE_UNUSED;
1158 const char **namep ATTRIBUTE_UNUSED;
1159 flagword *flagsp ATTRIBUTE_UNUSED;
1160 asection **secp;
1161 bfd_vma *valp;
1162 {
1163 *valp += (*secp)->vma;
1164 return true;
1165 }
1166
1167 /* Create the .plt and .got sections, and set up our hash table
1168 short-cuts to various dynamic sections. */
1169
1170 static boolean
1171 elf32_hppa_create_dynamic_sections (abfd, info)
1172 bfd *abfd;
1173 struct bfd_link_info *info;
1174 {
1175 struct elf32_hppa_link_hash_table *hplink;
1176
1177 /* Don't try to create the .plt and .got twice. */
1178 hplink = hppa_link_hash_table (info);
1179 if (hplink->splt != NULL)
1180 return true;
1181
1182 /* Call the generic code to do most of the work. */
1183 if (! _bfd_elf_create_dynamic_sections (abfd, info))
1184 return false;
1185
1186 hplink->splt = bfd_get_section_by_name (abfd, ".plt");
1187 hplink->srelplt = bfd_get_section_by_name (abfd, ".rela.plt");
1188
1189 hplink->sgot = bfd_get_section_by_name (abfd, ".got");
1190 hplink->srelgot = bfd_make_section (abfd, ".rela.got");
1191 if (hplink->srelgot == NULL
1192 || ! bfd_set_section_flags (abfd, hplink->srelgot,
1193 (SEC_ALLOC
1194 | SEC_LOAD
1195 | SEC_HAS_CONTENTS
1196 | SEC_IN_MEMORY
1197 | SEC_LINKER_CREATED
1198 | SEC_READONLY))
1199 || ! bfd_set_section_alignment (abfd, hplink->srelgot, 2))
1200 return false;
1201
1202 hplink->sdynbss = bfd_get_section_by_name (abfd, ".dynbss");
1203 hplink->srelbss = bfd_get_section_by_name (abfd, ".rela.bss");
1204
1205 return true;
1206 }
1207
1208 /* Look through the relocs for a section during the first phase, and
1209 allocate space in the global offset table or procedure linkage
1210 table. At this point we haven't necessarily read all the input
1211 files. */
1212
1213 static boolean
1214 elf32_hppa_check_relocs (abfd, info, sec, relocs)
1215 bfd *abfd;
1216 struct bfd_link_info *info;
1217 asection *sec;
1218 const Elf_Internal_Rela *relocs;
1219 {
1220 bfd *dynobj;
1221 Elf_Internal_Shdr *symtab_hdr;
1222 struct elf_link_hash_entry **sym_hashes;
1223 bfd_signed_vma *local_got_refcounts;
1224 const Elf_Internal_Rela *rel;
1225 const Elf_Internal_Rela *rel_end;
1226 struct elf32_hppa_link_hash_table *hplink;
1227 asection *sreloc;
1228 asection *stubreloc;
1229
1230 if (info->relocateable)
1231 return true;
1232
1233 hplink = hppa_link_hash_table (info);
1234 dynobj = hplink->root.dynobj;
1235 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1236 sym_hashes = elf_sym_hashes (abfd);
1237 local_got_refcounts = elf_local_got_refcounts (abfd);
1238 sreloc = NULL;
1239 stubreloc = NULL;
1240
1241 rel_end = relocs + sec->reloc_count;
1242 for (rel = relocs; rel < rel_end; rel++)
1243 {
1244 enum {
1245 NEED_GOT = 1,
1246 NEED_PLT = 2,
1247 NEED_DYNREL = 4,
1248 #if LONG_BRANCH_PIC_IN_SHLIB
1249 NEED_STUBREL = 0, /* We won't be needing them in this case. */
1250 #else
1251 NEED_STUBREL = 8,
1252 #endif
1253 PLT_PLABEL = 16
1254 };
1255
1256 unsigned int r_symndx, r_type;
1257 struct elf32_hppa_link_hash_entry *h;
1258 int need_entry;
1259
1260 r_symndx = ELF32_R_SYM (rel->r_info);
1261
1262 if (r_symndx < symtab_hdr->sh_info)
1263 h = NULL;
1264 else
1265 h = ((struct elf32_hppa_link_hash_entry *)
1266 sym_hashes[r_symndx - symtab_hdr->sh_info]);
1267
1268 r_type = ELF32_R_TYPE (rel->r_info);
1269
1270 switch (r_type)
1271 {
1272 case R_PARISC_DLTIND14F:
1273 case R_PARISC_DLTIND14R:
1274 case R_PARISC_DLTIND21L:
1275 /* This symbol requires a global offset table entry. */
1276 need_entry = NEED_GOT;
1277
1278 /* Mark this section as containing PIC code. */
1279 sec->flags |= SEC_HAS_GOT_REF;
1280 break;
1281
1282 case R_PARISC_PLABEL14R: /* "Official" procedure labels. */
1283 case R_PARISC_PLABEL21L:
1284 case R_PARISC_PLABEL32:
1285 /* If the addend is non-zero, we break badly. */
1286 BFD_ASSERT (rel->r_addend == 0);
1287
1288 /* If we are creating a shared library, then we need to
1289 create a PLT entry for all PLABELs, because PLABELs with
1290 local symbols may be passed via a pointer to another
1291 object. Additionally, output a dynamic relocation
1292 pointing to the PLT entry. */
1293 need_entry = PLT_PLABEL | NEED_PLT | NEED_DYNREL;
1294 break;
1295
1296 case R_PARISC_PCREL12F:
1297 hplink->has_12bit_branch = 1;
1298 /* Fall thru. */
1299 case R_PARISC_PCREL17C:
1300 case R_PARISC_PCREL17F:
1301 hplink->has_17bit_branch = 1;
1302 /* Fall thru. */
1303 case R_PARISC_PCREL22F:
1304 /* Function calls might need to go through the .plt, and
1305 might require long branch stubs. */
1306 if (h == NULL)
1307 {
1308 /* We know local syms won't need a .plt entry, and if
1309 they need a long branch stub we can't guarantee that
1310 we can reach the stub. So just flag an error later
1311 if we're doing a shared link and find we need a long
1312 branch stub. */
1313 continue;
1314 }
1315 else
1316 {
1317 /* Global symbols will need a .plt entry if they remain
1318 global, and in most cases won't need a long branch
1319 stub. Unfortunately, we have to cater for the case
1320 where a symbol is forced local by versioning, or due
1321 to symbolic linking, and we lose the .plt entry. */
1322 need_entry = NEED_PLT | NEED_STUBREL;
1323 }
1324 break;
1325
1326 case R_PARISC_SEGBASE: /* Used to set segment base. */
1327 case R_PARISC_SEGREL32: /* Relative reloc, used for unwind. */
1328 case R_PARISC_PCREL14F: /* PC relative load/store. */
1329 case R_PARISC_PCREL14R:
1330 case R_PARISC_PCREL17R: /* External branches. */
1331 case R_PARISC_PCREL21L: /* As above, and for load/store too. */
1332 /* We don't need to propagate the relocation if linking a
1333 shared object since these are section relative. */
1334 continue;
1335
1336 case R_PARISC_DPREL14F: /* Used for gp rel data load/store. */
1337 case R_PARISC_DPREL14R:
1338 case R_PARISC_DPREL21L:
1339 if (info->shared)
1340 {
1341 (*_bfd_error_handler)
1342 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
1343 bfd_get_filename (abfd),
1344 elf_hppa_howto_table[r_type].name);
1345 bfd_set_error (bfd_error_bad_value);
1346 return false;
1347 }
1348 /* Fall through. */
1349
1350 case R_PARISC_DIR17F: /* Used for external branches. */
1351 case R_PARISC_DIR17R:
1352 case R_PARISC_DIR14F: /* Used for load/store from absolute locn. */
1353 case R_PARISC_DIR14R:
1354 case R_PARISC_DIR21L: /* As above, and for ext branches too. */
1355 #if 1
1356 /* Help debug shared library creation. Any of the above
1357 relocs can be used in shared libs, but they may cause
1358 pages to become unshared. */
1359 if (info->shared)
1360 {
1361 (*_bfd_error_handler)
1362 (_("%s: relocation %s should not be used when making a shared object; recompile with -fPIC"),
1363 bfd_get_filename (abfd),
1364 elf_hppa_howto_table[r_type].name);
1365 }
1366 /* Fall through. */
1367 #endif
1368
1369 case R_PARISC_DIR32: /* .word relocs. */
1370 /* We may want to output a dynamic relocation later. */
1371 need_entry = NEED_DYNREL;
1372 break;
1373
1374 /* This relocation describes the C++ object vtable hierarchy.
1375 Reconstruct it for later use during GC. */
1376 case R_PARISC_GNU_VTINHERIT:
1377 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec,
1378 &h->elf, rel->r_offset))
1379 return false;
1380 continue;
1381
1382 /* This relocation describes which C++ vtable entries are actually
1383 used. Record for later use during GC. */
1384 case R_PARISC_GNU_VTENTRY:
1385 if (!_bfd_elf32_gc_record_vtentry (abfd, sec,
1386 &h->elf, rel->r_addend))
1387 return false;
1388 continue;
1389
1390 default:
1391 continue;
1392 }
1393
1394 /* Now carry out our orders. */
1395 if (need_entry & NEED_GOT)
1396 {
1397 /* Allocate space for a GOT entry, as well as a dynamic
1398 relocation for this entry. */
1399 if (dynobj == NULL)
1400 hplink->root.dynobj = dynobj = abfd;
1401
1402 if (hplink->sgot == NULL)
1403 {
1404 if (! elf32_hppa_create_dynamic_sections (dynobj, info))
1405 return false;
1406 }
1407
1408 if (h != NULL)
1409 {
1410 if (h->elf.got.refcount == -1)
1411 {
1412 h->elf.got.refcount = 1;
1413
1414 /* Make sure this symbol is output as a dynamic symbol. */
1415 if (h->elf.dynindx == -1)
1416 {
1417 if (! bfd_elf32_link_record_dynamic_symbol (info,
1418 &h->elf))
1419 return false;
1420 }
1421
1422 hplink->sgot->_raw_size += GOT_ENTRY_SIZE;
1423 hplink->srelgot->_raw_size += sizeof (Elf32_External_Rela);
1424 }
1425 else
1426 h->elf.got.refcount += 1;
1427 }
1428 else
1429 {
1430 /* This is a global offset table entry for a local symbol. */
1431 if (local_got_refcounts == NULL)
1432 {
1433 size_t size;
1434
1435 /* Allocate space for local got offsets and local
1436 plt offsets. Done this way to save polluting
1437 elf_obj_tdata with another target specific
1438 pointer. */
1439 size = symtab_hdr->sh_info * 2 * sizeof (bfd_signed_vma);
1440 local_got_refcounts = ((bfd_signed_vma *)
1441 bfd_alloc (abfd, size));
1442 if (local_got_refcounts == NULL)
1443 return false;
1444 elf_local_got_refcounts (abfd) = local_got_refcounts;
1445 memset (local_got_refcounts, -1, size);
1446 }
1447 if (local_got_refcounts[r_symndx] == -1)
1448 {
1449 local_got_refcounts[r_symndx] = 1;
1450
1451 hplink->sgot->_raw_size += GOT_ENTRY_SIZE;
1452 if (info->shared)
1453 {
1454 /* If we are generating a shared object, we need to
1455 output a reloc so that the dynamic linker can
1456 adjust this GOT entry (because the address
1457 the shared library is loaded at is not fixed). */
1458 hplink->srelgot->_raw_size +=
1459 sizeof (Elf32_External_Rela);
1460 }
1461 }
1462 else
1463 local_got_refcounts[r_symndx] += 1;
1464 }
1465 }
1466
1467 if (need_entry & NEED_PLT)
1468 {
1469 /* If we are creating a shared library, and this is a reloc
1470 against a weak symbol or a global symbol in a dynamic
1471 object, then we will be creating an import stub and a
1472 .plt entry for the symbol. Similarly, on a normal link
1473 to symbols defined in a dynamic object we'll need the
1474 import stub and a .plt entry. We don't know yet whether
1475 the symbol is defined or not, so make an entry anyway and
1476 clean up later in adjust_dynamic_symbol. */
1477 if ((sec->flags & SEC_ALLOC) != 0)
1478 {
1479 if (h != NULL)
1480 {
1481 if (h->elf.plt.refcount == -1)
1482 {
1483 h->elf.plt.refcount = 1;
1484 h->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1485 }
1486 else
1487 h->elf.plt.refcount += 1;
1488
1489 /* If this .plt entry is for a plabel, mark it so
1490 that adjust_dynamic_symbol will keep the entry
1491 even if it appears to be local. */
1492 if (need_entry & PLT_PLABEL)
1493 h->plabel = 1;
1494 }
1495 else if (need_entry & PLT_PLABEL)
1496 {
1497 int indx;
1498
1499 if (local_got_refcounts == NULL)
1500 {
1501 size_t size;
1502
1503 /* Allocate space for local got offsets and local
1504 plt offsets. */
1505 size = symtab_hdr->sh_info * 2 * sizeof (bfd_signed_vma);
1506 local_got_refcounts = ((bfd_signed_vma *)
1507 bfd_alloc (abfd, size));
1508 if (local_got_refcounts == NULL)
1509 return false;
1510 elf_local_got_refcounts (abfd) = local_got_refcounts;
1511 memset (local_got_refcounts, -1, size);
1512 }
1513 indx = r_symndx + symtab_hdr->sh_info;
1514 if (local_got_refcounts[indx] == -1)
1515 local_got_refcounts[indx] = 1;
1516 else
1517 local_got_refcounts[indx] += 1;
1518 }
1519 }
1520 }
1521
1522 if (need_entry & (NEED_DYNREL | NEED_STUBREL))
1523 {
1524 /* Flag this symbol as having a non-got, non-plt reference
1525 so that we generate copy relocs if it turns out to be
1526 dynamic. */
1527 if (h != NULL)
1528 h->elf.elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
1529
1530 /* If we are creating a shared library then we need to copy
1531 the reloc into the shared library. However, if we are
1532 linking with -Bsymbolic, we need only copy absolute
1533 relocs or relocs against symbols that are not defined in
1534 an object we are including in the link. PC- or DP- or
1535 DLT-relative relocs against any local sym or global sym
1536 with DEF_REGULAR set, can be discarded. At this point we
1537 have not seen all the input files, so it is possible that
1538 DEF_REGULAR is not set now but will be set later (it is
1539 never cleared). We account for that possibility below by
1540 storing information in the reloc_entries field of the
1541 hash table entry.
1542
1543 A similar situation to the -Bsymbolic case occurs when
1544 creating shared libraries and symbol visibility changes
1545 render the symbol local.
1546
1547 As it turns out, all the relocs we will be creating here
1548 are absolute, so we cannot remove them on -Bsymbolic
1549 links or visibility changes anyway. A STUB_REL reloc
1550 is absolute too, as in that case it is the reloc in the
1551 stub we will be creating, rather than copying the PCREL
1552 reloc in the branch. */
1553 if ((sec->flags & SEC_ALLOC) != 0
1554 && info->shared
1555 #if RELATIVE_DYNAMIC_RELOCS
1556 && (!info->symbolic
1557 || is_absolute_reloc (r_type)
1558 || (h != NULL
1559 && ((h->elf.elf_link_hash_flags
1560 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1561 #endif
1562 )
1563 {
1564 boolean doit;
1565 asection *srel;
1566
1567 srel = sreloc;
1568 if ((need_entry & NEED_STUBREL))
1569 srel = stubreloc;
1570
1571 /* Create a reloc section in dynobj and make room for
1572 this reloc. */
1573 if (srel == NULL)
1574 {
1575 char *name;
1576
1577 if (dynobj == NULL)
1578 hplink->root.dynobj = dynobj = abfd;
1579
1580 name = bfd_elf_string_from_elf_section
1581 (abfd,
1582 elf_elfheader (abfd)->e_shstrndx,
1583 elf_section_data (sec)->rel_hdr.sh_name);
1584 if (name == NULL)
1585 {
1586 (*_bfd_error_handler)
1587 (_("Could not find relocation section for %s"),
1588 sec->name);
1589 bfd_set_error (bfd_error_bad_value);
1590 return false;
1591 }
1592
1593 if ((need_entry & NEED_STUBREL))
1594 {
1595 size_t len = strlen (name) + sizeof (STUB_SUFFIX);
1596 char *newname = bfd_malloc (len);
1597
1598 if (newname == NULL)
1599 return false;
1600 strcpy (newname, name);
1601 strcpy (newname + len - sizeof (STUB_SUFFIX),
1602 STUB_SUFFIX);
1603 name = newname;
1604 }
1605
1606 srel = bfd_get_section_by_name (dynobj, name);
1607 if (srel == NULL)
1608 {
1609 flagword flags;
1610
1611 srel = bfd_make_section (dynobj, name);
1612 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1613 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1614 if ((sec->flags & SEC_ALLOC) != 0)
1615 flags |= SEC_ALLOC | SEC_LOAD;
1616 if (srel == NULL
1617 || !bfd_set_section_flags (dynobj, srel, flags)
1618 || !bfd_set_section_alignment (dynobj, srel, 2))
1619 return false;
1620 }
1621 else if ((need_entry & NEED_STUBREL))
1622 free (name);
1623
1624 if ((need_entry & NEED_STUBREL))
1625 stubreloc = srel;
1626 else
1627 sreloc = srel;
1628 }
1629
1630 #if ! LONG_BRANCH_PIC_IN_SHLIB
1631 /* If this is a function call, we only need one dynamic
1632 reloc for the stub as all calls to a particular
1633 function will go through the same stub. Actually, a
1634 long branch stub needs two relocations, but we count
1635 on some intelligence on the part of the dynamic
1636 linker. */
1637 if ((need_entry & NEED_STUBREL))
1638 {
1639 doit = h->stub_reloc_sec != stubreloc;
1640 h->stub_reloc_sec = stubreloc;
1641 }
1642 else
1643 #endif
1644 doit = 1;
1645
1646 if (doit)
1647 {
1648 srel->_raw_size += sizeof (Elf32_External_Rela);
1649
1650 #if ! LONG_BRANCH_PIC_IN_SHLIB || RELATIVE_DYNAMIC_RELOCS
1651 /* Keep track of relocations we have entered for
1652 this global symbol, so that we can discard them
1653 later if necessary. */
1654 if (h != NULL
1655 && (0
1656 #if RELATIVE_DYNAMIC_RELOCS
1657 || ! is_absolute_reloc (rtype)
1658 #endif
1659 || (need_entry & NEED_STUBREL)))
1660 {
1661 struct elf32_hppa_dyn_reloc_entry *p;
1662
1663 for (p = h->reloc_entries; p != NULL; p = p->next)
1664 if (p->section == srel)
1665 break;
1666
1667 if (p == NULL)
1668 {
1669 p = ((struct elf32_hppa_dyn_reloc_entry *)
1670 bfd_alloc (dynobj, sizeof *p));
1671 if (p == NULL)
1672 return false;
1673 p->next = h->reloc_entries;
1674 h->reloc_entries = p;
1675 p->section = srel;
1676 p->count = 0;
1677 }
1678
1679 /* NEED_STUBREL and NEED_DYNREL are never both
1680 set. Leave the count at zero for the
1681 NEED_STUBREL case as we only ever have one
1682 stub reloc per section per symbol, and this
1683 simplifies code in hppa_discard_copies. */
1684 if (! (need_entry & NEED_STUBREL))
1685 ++p->count;
1686 }
1687 #endif
1688 }
1689 }
1690 }
1691 }
1692
1693 return true;
1694 }
1695
1696 /* Return the section that should be marked against garbage collection
1697 for a given relocation. */
1698
1699 static asection *
1700 elf32_hppa_gc_mark_hook (abfd, info, rel, h, sym)
1701 bfd *abfd;
1702 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1703 Elf_Internal_Rela *rel;
1704 struct elf_link_hash_entry *h;
1705 Elf_Internal_Sym *sym;
1706 {
1707 if (h != NULL)
1708 {
1709 switch ((unsigned int) ELF32_R_TYPE (rel->r_info))
1710 {
1711 case R_PARISC_GNU_VTINHERIT:
1712 case R_PARISC_GNU_VTENTRY:
1713 break;
1714
1715 default:
1716 switch (h->root.type)
1717 {
1718 case bfd_link_hash_defined:
1719 case bfd_link_hash_defweak:
1720 return h->root.u.def.section;
1721
1722 case bfd_link_hash_common:
1723 return h->root.u.c.p->section;
1724
1725 default:
1726 break;
1727 }
1728 }
1729 }
1730 else
1731 {
1732 if (!(elf_bad_symtab (abfd)
1733 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
1734 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
1735 && sym->st_shndx != SHN_COMMON))
1736 {
1737 return bfd_section_from_elf_index (abfd, sym->st_shndx);
1738 }
1739 }
1740
1741 return NULL;
1742 }
1743
1744 /* Update the got and plt entry reference counts for the section being
1745 removed. */
1746
1747 static boolean
1748 elf32_hppa_gc_sweep_hook (abfd, info, sec, relocs)
1749 bfd *abfd;
1750 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1751 asection *sec;
1752 const Elf_Internal_Rela *relocs;
1753 {
1754 Elf_Internal_Shdr *symtab_hdr;
1755 struct elf_link_hash_entry **sym_hashes;
1756 bfd_signed_vma *local_got_refcounts;
1757 bfd_signed_vma *local_plt_refcounts;
1758 const Elf_Internal_Rela *rel, *relend;
1759 unsigned long r_symndx;
1760 struct elf_link_hash_entry *h;
1761 struct elf32_hppa_link_hash_table *hplink;
1762 bfd *dynobj;
1763 asection *sgot;
1764 asection *srelgot;
1765
1766 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1767 sym_hashes = elf_sym_hashes (abfd);
1768 local_got_refcounts = elf_local_got_refcounts (abfd);
1769 local_plt_refcounts = local_got_refcounts;
1770 if (local_plt_refcounts != NULL)
1771 local_plt_refcounts += symtab_hdr->sh_info;
1772 hplink = hppa_link_hash_table (info);
1773 dynobj = hplink->root.dynobj;
1774 if (dynobj == NULL)
1775 return true;
1776
1777 sgot = hplink->sgot;
1778 srelgot = hplink->srelgot;
1779
1780 relend = relocs + sec->reloc_count;
1781 for (rel = relocs; rel < relend; rel++)
1782 switch ((unsigned int) ELF32_R_TYPE (rel->r_info))
1783 {
1784 case R_PARISC_DLTIND14F:
1785 case R_PARISC_DLTIND14R:
1786 case R_PARISC_DLTIND21L:
1787 r_symndx = ELF32_R_SYM (rel->r_info);
1788 if (r_symndx >= symtab_hdr->sh_info)
1789 {
1790 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1791 if (h->got.refcount > 0)
1792 {
1793 h->got.refcount -= 1;
1794 if (h->got.refcount == 0)
1795 {
1796 sgot->_raw_size -= GOT_ENTRY_SIZE;
1797 srelgot->_raw_size -= sizeof (Elf32_External_Rela);
1798 }
1799 }
1800 }
1801 else if (local_got_refcounts != NULL)
1802 {
1803 if (local_got_refcounts[r_symndx] > 0)
1804 {
1805 local_got_refcounts[r_symndx] -= 1;
1806 if (local_got_refcounts[r_symndx] == 0)
1807 {
1808 sgot->_raw_size -= GOT_ENTRY_SIZE;
1809 if (info->shared)
1810 srelgot->_raw_size -= sizeof (Elf32_External_Rela);
1811 }
1812 }
1813 }
1814 break;
1815
1816 case R_PARISC_PCREL12F:
1817 case R_PARISC_PCREL17C:
1818 case R_PARISC_PCREL17F:
1819 case R_PARISC_PCREL22F:
1820 r_symndx = ELF32_R_SYM (rel->r_info);
1821 if (r_symndx >= symtab_hdr->sh_info)
1822 {
1823 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1824 if (h->plt.refcount > 0)
1825 h->plt.refcount -= 1;
1826 }
1827 break;
1828
1829 case R_PARISC_PLABEL14R:
1830 case R_PARISC_PLABEL21L:
1831 case R_PARISC_PLABEL32:
1832 r_symndx = ELF32_R_SYM (rel->r_info);
1833 if (r_symndx >= symtab_hdr->sh_info)
1834 {
1835 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1836 if (h->plt.refcount > 0)
1837 h->plt.refcount -= 1;
1838 }
1839 else if (local_plt_refcounts != NULL)
1840 {
1841 if (local_plt_refcounts[r_symndx] > 0)
1842 local_plt_refcounts[r_symndx] -= 1;
1843 }
1844 break;
1845
1846 default:
1847 break;
1848 }
1849
1850 return true;
1851 }
1852
1853 /* Our own version of hide_symbol, so that we can keep plt entries for
1854 plabels. */
1855
1856 static void
1857 elf32_hppa_hide_symbol (info, h)
1858 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1859 struct elf_link_hash_entry *h;
1860 {
1861 h->dynindx = -1;
1862 if (! ((struct elf32_hppa_link_hash_entry *) h)->plabel)
1863 {
1864 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1865 h->plt.offset = (bfd_vma) -1;
1866 }
1867 }
1868
1869 /* Adjust a symbol defined by a dynamic object and referenced by a
1870 regular object. The current definition is in some section of the
1871 dynamic object, but we're not including those sections. We have to
1872 change the definition to something the rest of the link can
1873 understand. */
1874
1875 static boolean
1876 elf32_hppa_adjust_dynamic_symbol (info, h)
1877 struct bfd_link_info *info;
1878 struct elf_link_hash_entry *h;
1879 {
1880 bfd *dynobj;
1881 struct elf32_hppa_link_hash_table *hplink;
1882 asection *s;
1883
1884 hplink = hppa_link_hash_table (info);
1885 dynobj = hplink->root.dynobj;
1886
1887 /* If this is a function, put it in the procedure linkage table. We
1888 will fill in the contents of the procedure linkage table later,
1889 when we know the address of the .got section. */
1890 if (h->type == STT_FUNC
1891 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1892 {
1893 if (h->plt.refcount <= 0
1894 || ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1895 && h->root.type != bfd_link_hash_defweak
1896 && ! ((struct elf32_hppa_link_hash_entry *) h)->plabel
1897 && (!info->shared || info->symbolic)))
1898 {
1899 /* The .plt entry is not needed when:
1900 a) Garbage collection has removed all references to the
1901 symbol, or
1902 b) We know for certain the symbol is defined in this
1903 object, and it's not a weak definition, nor is the symbol
1904 used by a plabel relocation. Either this object is the
1905 application or we are doing a shared symbolic link. */
1906
1907 /* As a special sop to the hppa ABI, we keep a .plt entry
1908 for functions in sections containing PIC code. */
1909 if (!info->shared
1910 && h->plt.refcount > 0
1911 && (h->root.type == bfd_link_hash_defined
1912 || h->root.type == bfd_link_hash_defweak)
1913 && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0)
1914 {
1915 ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1;
1916 }
1917 else
1918 {
1919 h->plt.offset = (bfd_vma) -1;
1920 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1921 return true;
1922 }
1923 }
1924
1925 /* Make an entry in the .plt section. */
1926 s = hplink->splt;
1927 h->plt.offset = s->_raw_size;
1928 if (PLABEL_PLT_ENTRY_SIZE != PLT_ENTRY_SIZE
1929 && ((struct elf32_hppa_link_hash_entry *) h)->plabel
1930 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1931 {
1932 /* Add some extra space for the dynamic linker to use. */
1933 s->_raw_size += PLABEL_PLT_ENTRY_SIZE;
1934 }
1935 else
1936 s->_raw_size += PLT_ENTRY_SIZE;
1937
1938 if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call)
1939 {
1940 /* Make sure this symbol is output as a dynamic symbol. */
1941 if (h->dynindx == -1
1942 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1943 {
1944 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
1945 return false;
1946 }
1947
1948 /* We also need to make an entry in the .rela.plt section. */
1949 s = hplink->srelplt;
1950 s->_raw_size += sizeof (Elf32_External_Rela);
1951
1952 hplink->need_plt_stub = 1;
1953 }
1954 return true;
1955 }
1956
1957 /* If this is a weak symbol, and there is a real definition, the
1958 processor independent code will have arranged for us to see the
1959 real definition first, and we can just use the same value. */
1960 if (h->weakdef != NULL)
1961 {
1962 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1963 || h->weakdef->root.type == bfd_link_hash_defweak);
1964 h->root.u.def.section = h->weakdef->root.u.def.section;
1965 h->root.u.def.value = h->weakdef->root.u.def.value;
1966 return true;
1967 }
1968
1969 /* This is a reference to a symbol defined by a dynamic object which
1970 is not a function. */
1971
1972 /* If we are creating a shared library, we must presume that the
1973 only references to the symbol are via the global offset table.
1974 For such cases we need not do anything here; the relocations will
1975 be handled correctly by relocate_section. */
1976 if (info->shared)
1977 return true;
1978
1979 /* If there are no references to this symbol that do not use the
1980 GOT, we don't need to generate a copy reloc. */
1981 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1982 return true;
1983
1984 /* We must allocate the symbol in our .dynbss section, which will
1985 become part of the .bss section of the executable. There will be
1986 an entry for this symbol in the .dynsym section. The dynamic
1987 object will contain position independent code, so all references
1988 from the dynamic object to this symbol will go through the global
1989 offset table. The dynamic linker will use the .dynsym entry to
1990 determine the address it must put in the global offset table, so
1991 both the dynamic object and the regular object will refer to the
1992 same memory location for the variable. */
1993
1994 s = hplink->sdynbss;
1995
1996 /* We must generate a COPY reloc to tell the dynamic linker to
1997 copy the initial value out of the dynamic object and into the
1998 runtime process image. We need to remember the offset into the
1999 .rela.bss section we are going to use. */
2000 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2001 {
2002 asection *srel;
2003
2004 srel = hplink->srelbss;
2005 srel->_raw_size += sizeof (Elf32_External_Rela);
2006 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
2007 }
2008
2009 {
2010 /* We need to figure out the alignment required for this symbol. I
2011 have no idea how other ELF linkers handle this. */
2012 unsigned int power_of_two;
2013
2014 power_of_two = bfd_log2 (h->size);
2015 if (power_of_two > 3)
2016 power_of_two = 3;
2017
2018 /* Apply the required alignment. */
2019 s->_raw_size = BFD_ALIGN (s->_raw_size,
2020 (bfd_size_type) (1 << power_of_two));
2021 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2022 {
2023 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
2024 return false;
2025 }
2026 }
2027 /* Define the symbol as being at this point in the section. */
2028 h->root.u.def.section = s;
2029 h->root.u.def.value = s->_raw_size;
2030
2031 /* Increment the section size to make room for the symbol. */
2032 s->_raw_size += h->size;
2033
2034 return true;
2035 }
2036
2037 /* Called via elf_link_hash_traverse to create .plt entries for an
2038 application that uses statically linked PIC functions. Similar to
2039 the first part of elf32_hppa_adjust_dynamic_symbol. */
2040
2041 static boolean
2042 hppa_handle_PIC_calls (h, inf)
2043 struct elf_link_hash_entry *h;
2044 PTR inf;
2045 {
2046 struct bfd_link_info *info;
2047 bfd *dynobj;
2048 struct elf32_hppa_link_hash_table *hplink;
2049 asection *s;
2050
2051 if (! (h->plt.refcount > 0
2052 && (h->root.type == bfd_link_hash_defined
2053 || h->root.type == bfd_link_hash_defweak)
2054 && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0))
2055 {
2056 h->plt.offset = (bfd_vma) -1;
2057 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2058 return true;
2059 }
2060
2061 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2062 ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1;
2063
2064 info = (struct bfd_link_info *) inf;
2065 hplink = hppa_link_hash_table (info);
2066 dynobj = hplink->root.dynobj;
2067
2068 /* Make an entry in the .plt section. */
2069 s = hplink->splt;
2070 h->plt.offset = s->_raw_size;
2071 s->_raw_size += PLT_ENTRY_SIZE;
2072
2073 return true;
2074 }
2075
2076 #if ((! LONG_BRANCH_PIC_IN_SHLIB && LONG_BRANCH_VIA_PLT) \
2077 || RELATIVE_DYNAMIC_RELOCS)
2078 /* This function is called via elf_link_hash_traverse to discard space
2079 we allocated for relocs that it turned out we didn't need. */
2080
2081 static boolean
2082 hppa_discard_copies (h, inf)
2083 struct elf_link_hash_entry *h;
2084 PTR inf;
2085 {
2086 struct elf32_hppa_dyn_reloc_entry *s;
2087 struct elf32_hppa_link_hash_entry *eh;
2088 struct bfd_link_info *info;
2089
2090 eh = (struct elf32_hppa_link_hash_entry *) h;
2091 info = (struct bfd_link_info *) inf;
2092
2093 #if ! LONG_BRANCH_PIC_IN_SHLIB && LONG_BRANCH_VIA_PLT
2094 /* Handle the stub reloc case. If we have a plt entry for the
2095 function, we won't be needing long branch stubs. s->count will
2096 only be zero for stub relocs, which provides a handy way of
2097 flagging these relocs, and means we need do nothing special for
2098 the forced local and symbolic link case. */
2099 if (eh->stub_reloc_sec != NULL
2100 && eh->elf.plt.offset != (bfd_vma) -1)
2101 {
2102 for (s = eh->reloc_entries; s != NULL; s = s->next)
2103 if (s->count == 0)
2104 s->section->_raw_size -= sizeof (Elf32_External_Rela);
2105 }
2106 #endif
2107
2108 #if RELATIVE_DYNAMIC_RELOCS
2109 /* If a symbol has been forced local or we have found a regular
2110 definition for the symbolic link case, then we won't be needing
2111 any relocs. */
2112 if (eh->elf.dynindx == -1
2113 || ((eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
2114 && !is_absolute_reloc (r_type)
2115 && info->symbolic))
2116 {
2117 for (s = eh->reloc_entries; s != NULL; s = s->next)
2118 s->section->_raw_size -= s->count * sizeof (Elf32_External_Rela);
2119 }
2120 #endif
2121
2122 return true;
2123 }
2124 #endif
2125
2126 /* This function is called via elf_link_hash_traverse to force
2127 millicode symbols local so they do not end up as globals in the
2128 dynamic symbol table. We ought to be able to do this in
2129 adjust_dynamic_symbol, but our adjust_dynamic_symbol is not called
2130 for all dynamic symbols. Arguably, this is a bug in
2131 elf_adjust_dynamic_symbol. */
2132
2133 static boolean
2134 clobber_millicode_symbols (h, info)
2135 struct elf_link_hash_entry *h;
2136 struct bfd_link_info *info;
2137 {
2138 /* Note! We only want to remove these from the dynamic symbol
2139 table. Therefore we do not set ELF_LINK_FORCED_LOCAL. */
2140 if (h->type == STT_PARISC_MILLI)
2141 elf32_hppa_hide_symbol (info, h);
2142 return true;
2143 }
2144
2145 /* Set the sizes of the dynamic sections. */
2146
2147 static boolean
2148 elf32_hppa_size_dynamic_sections (output_bfd, info)
2149 bfd *output_bfd;
2150 struct bfd_link_info *info;
2151 {
2152 struct elf32_hppa_link_hash_table *hplink;
2153 bfd *dynobj;
2154 asection *s;
2155 boolean relocs;
2156 boolean reltext;
2157
2158 hplink = hppa_link_hash_table (info);
2159 dynobj = hplink->root.dynobj;
2160 BFD_ASSERT (dynobj != NULL);
2161
2162 if (hplink->root.dynamic_sections_created)
2163 {
2164 bfd *i;
2165
2166 /* Set the contents of the .interp section to the interpreter. */
2167 if (! info->shared)
2168 {
2169 s = bfd_get_section_by_name (dynobj, ".interp");
2170 BFD_ASSERT (s != NULL);
2171 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
2172 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2173 }
2174
2175 /* Force millicode symbols local. */
2176 elf_link_hash_traverse (&hplink->root,
2177 clobber_millicode_symbols,
2178 info);
2179
2180 /* Set up .plt offsets for local plabels. */
2181 for (i = info->input_bfds; i; i = i->link_next)
2182 {
2183 bfd_signed_vma *local_plt;
2184 bfd_signed_vma *end_local_plt;
2185 bfd_size_type locsymcount;
2186 Elf_Internal_Shdr *symtab_hdr;
2187
2188 local_plt = elf_local_got_refcounts (i);
2189 if (!local_plt)
2190 continue;
2191
2192 symtab_hdr = &elf_tdata (i)->symtab_hdr;
2193 locsymcount = symtab_hdr->sh_info;
2194 local_plt += locsymcount;
2195 end_local_plt = local_plt + locsymcount;
2196
2197 for (; local_plt < end_local_plt; ++local_plt)
2198 {
2199 if (*local_plt > 0)
2200 {
2201 s = hplink->splt;
2202 *local_plt = s->_raw_size;
2203 s->_raw_size += PLT_ENTRY_SIZE;
2204 if (info->shared)
2205 hplink->srelplt->_raw_size += sizeof (Elf32_External_Rela);
2206 }
2207 else
2208 *local_plt = (bfd_vma) -1;
2209 }
2210 }
2211 }
2212 else
2213 {
2214 /* Run through the function symbols, looking for any that are
2215 PIC, and allocate space for the necessary .plt entries so
2216 that %r19 will be set up. */
2217 if (! info->shared)
2218 elf_link_hash_traverse (&hplink->root,
2219 hppa_handle_PIC_calls,
2220 info);
2221
2222 /* We may have created entries in the .rela.got section.
2223 However, if we are not creating the dynamic sections, we will
2224 not actually use these entries. Reset the size of .rela.got,
2225 which will cause it to get stripped from the output file
2226 below. */
2227 hplink->srelgot->_raw_size = 0;
2228 }
2229
2230 #if ((! LONG_BRANCH_PIC_IN_SHLIB && LONG_BRANCH_VIA_PLT) \
2231 || RELATIVE_DYNAMIC_RELOCS)
2232 /* If this is a -Bsymbolic shared link, then we need to discard all
2233 relocs against symbols defined in a regular object. We also need
2234 to lose relocs we've allocated for long branch stubs if we know
2235 we won't be generating a stub. */
2236 if (info->shared)
2237 elf_link_hash_traverse (&hplink->root,
2238 hppa_discard_copies,
2239 info);
2240 #endif
2241
2242 /* The check_relocs and adjust_dynamic_symbol entry points have
2243 determined the sizes of the various dynamic sections. Allocate
2244 memory for them. */
2245 relocs = false;
2246 reltext = false;
2247 for (s = dynobj->sections; s != NULL; s = s->next)
2248 {
2249 const char *name;
2250
2251 if ((s->flags & SEC_LINKER_CREATED) == 0)
2252 continue;
2253
2254 /* It's OK to base decisions on the section name, because none
2255 of the dynobj section names depend upon the input files. */
2256 name = bfd_get_section_name (dynobj, s);
2257
2258 if (strncmp (name, ".rela", 5) == 0)
2259 {
2260 if (s->_raw_size != 0)
2261 {
2262 asection *target;
2263 const char *outname;
2264
2265 /* Remember whether there are any reloc sections other
2266 than .rela.plt. */
2267 if (strcmp (name+5, ".plt") != 0)
2268 relocs = true;
2269
2270 /* If this relocation section applies to a read only
2271 section, then we probably need a DT_TEXTREL entry. */
2272 outname = bfd_get_section_name (output_bfd,
2273 s->output_section);
2274 target = bfd_get_section_by_name (output_bfd, outname + 5);
2275 if (target != NULL
2276 && (target->flags & SEC_READONLY) != 0
2277 && (target->flags & SEC_ALLOC) != 0)
2278 reltext = true;
2279
2280 /* We use the reloc_count field as a counter if we need
2281 to copy relocs into the output file. */
2282 s->reloc_count = 0;
2283 }
2284 }
2285 else if (strcmp (name, ".plt") == 0)
2286 {
2287 if (hplink->need_plt_stub)
2288 {
2289 /* Make space for the plt stub at the end of the .plt
2290 section. We want this stub right at the end, up
2291 against the .got section. */
2292 int gotalign = bfd_section_alignment (dynobj, hplink->sgot);
2293 int pltalign = bfd_section_alignment (dynobj, s);
2294 bfd_size_type mask;
2295
2296 if (gotalign > pltalign)
2297 bfd_set_section_alignment (dynobj, s, gotalign);
2298 mask = ((bfd_size_type) 1 << gotalign) - 1;
2299 s->_raw_size = (s->_raw_size + sizeof (plt_stub) + mask) & ~mask;
2300 }
2301 }
2302 else if (strcmp (name, ".got") == 0)
2303 ;
2304 else
2305 {
2306 /* It's not one of our sections, so don't allocate space. */
2307 continue;
2308 }
2309
2310 if (s->_raw_size == 0)
2311 {
2312 /* If we don't need this section, strip it from the
2313 output file. This is mostly to handle .rela.bss and
2314 .rela.plt. We must create both sections in
2315 create_dynamic_sections, because they must be created
2316 before the linker maps input sections to output
2317 sections. The linker does that before
2318 adjust_dynamic_symbol is called, and it is that
2319 function which decides whether anything needs to go
2320 into these sections. */
2321 _bfd_strip_section_from_output (info, s);
2322 continue;
2323 }
2324
2325 /* Allocate memory for the section contents. Zero it, because
2326 we may not fill in all the reloc sections. */
2327 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2328 if (s->contents == NULL && s->_raw_size != 0)
2329 return false;
2330 }
2331
2332 if (hplink->root.dynamic_sections_created)
2333 {
2334 /* Like IA-64 and HPPA64, always create a DT_PLTGOT. It
2335 actually has nothing to do with the PLT, it is how we
2336 communicate the LTP value of a load module to the dynamic
2337 linker. */
2338 if (! bfd_elf32_add_dynamic_entry (info, DT_PLTGOT, 0))
2339 return false;
2340
2341 /* Add some entries to the .dynamic section. We fill in the
2342 values later, in elf32_hppa_finish_dynamic_sections, but we
2343 must add the entries now so that we get the correct size for
2344 the .dynamic section. The DT_DEBUG entry is filled in by the
2345 dynamic linker and used by the debugger. */
2346 if (! info->shared)
2347 {
2348 if (! bfd_elf32_add_dynamic_entry (info, DT_DEBUG, 0))
2349 return false;
2350 }
2351
2352 if (hplink->srelplt->_raw_size != 0)
2353 {
2354 if (! bfd_elf32_add_dynamic_entry (info, DT_PLTRELSZ, 0)
2355 || ! bfd_elf32_add_dynamic_entry (info, DT_PLTREL, DT_RELA)
2356 || ! bfd_elf32_add_dynamic_entry (info, DT_JMPREL, 0))
2357 return false;
2358 }
2359
2360 if (relocs)
2361 {
2362 if (! bfd_elf32_add_dynamic_entry (info, DT_RELA, 0)
2363 || ! bfd_elf32_add_dynamic_entry (info, DT_RELASZ, 0)
2364 || ! bfd_elf32_add_dynamic_entry (info, DT_RELAENT,
2365 sizeof (Elf32_External_Rela)))
2366 return false;
2367 }
2368
2369 if (reltext)
2370 {
2371 if (! bfd_elf32_add_dynamic_entry (info, DT_TEXTREL, 0))
2372 return false;
2373 info->flags |= DF_TEXTREL;
2374 }
2375 }
2376
2377 return true;
2378 }
2379
2380 /* External entry points for sizing and building linker stubs. */
2381
2382 /* Determine and set the size of the stub section for a final link.
2383
2384 The basic idea here is to examine all the relocations looking for
2385 PC-relative calls to a target that is unreachable with a "bl"
2386 instruction. */
2387
2388 boolean
2389 elf32_hppa_size_stubs (output_bfd, stub_bfd, info, multi_subspace, group_size,
2390 add_stub_section, layout_sections_again)
2391 bfd *output_bfd;
2392 bfd *stub_bfd;
2393 struct bfd_link_info *info;
2394 boolean multi_subspace;
2395 bfd_signed_vma group_size;
2396 asection * (*add_stub_section) PARAMS ((const char *, asection *));
2397 void (*layout_sections_again) PARAMS ((void));
2398 {
2399 bfd *input_bfd;
2400 asection *section;
2401 asection **input_list, **list;
2402 Elf_Internal_Sym *local_syms, **all_local_syms;
2403 unsigned int bfd_indx, bfd_count;
2404 int top_id, top_index;
2405 struct elf32_hppa_link_hash_table *hplink;
2406 bfd_size_type stub_group_size;
2407 boolean stubs_always_before_branch;
2408 boolean stub_changed = 0;
2409 boolean ret = 0;
2410
2411 hplink = hppa_link_hash_table (info);
2412
2413 /* Stash our params away. */
2414 hplink->stub_bfd = stub_bfd;
2415 hplink->multi_subspace = multi_subspace;
2416 hplink->add_stub_section = add_stub_section;
2417 hplink->layout_sections_again = layout_sections_again;
2418 stubs_always_before_branch = group_size < 0;
2419 if (group_size < 0)
2420 stub_group_size = -group_size;
2421 else
2422 stub_group_size = group_size;
2423 if (stub_group_size == 1)
2424 {
2425 /* Default values. */
2426 stub_group_size = 8000000;
2427 if (hplink->has_17bit_branch || hplink->multi_subspace)
2428 stub_group_size = 250000;
2429 if (hplink->has_12bit_branch)
2430 stub_group_size = 7812;
2431 }
2432
2433 /* Count the number of input BFDs and find the top input section id. */
2434 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2435 input_bfd != NULL;
2436 input_bfd = input_bfd->link_next)
2437 {
2438 bfd_count += 1;
2439 for (section = input_bfd->sections;
2440 section != NULL;
2441 section = section->next)
2442 {
2443 if (top_id < section->id)
2444 top_id = section->id;
2445 }
2446 }
2447
2448 hplink->stub_group
2449 = (struct map_stub *) bfd_zmalloc (sizeof (struct map_stub) * (top_id + 1));
2450 if (hplink->stub_group == NULL)
2451 return false;
2452
2453 /* Make a list of input sections for each output section included in
2454 the link.
2455
2456 We can't use output_bfd->section_count here to find the top output
2457 section index as some sections may have been removed, and
2458 _bfd_strip_section_from_output doesn't renumber the indices. */
2459 for (section = output_bfd->sections, top_index = 0;
2460 section != NULL;
2461 section = section->next)
2462 {
2463 if (top_index < section->index)
2464 top_index = section->index;
2465 }
2466
2467 input_list
2468 = (asection **) bfd_malloc (sizeof (asection *) * (top_index + 1));
2469 if (input_list == NULL)
2470 return false;
2471
2472 /* For sections we aren't interested in, mark their entries with a
2473 value we can check later. */
2474 list = input_list + top_index;
2475 do
2476 *list = bfd_abs_section_ptr;
2477 while (list-- != input_list);
2478
2479 for (section = output_bfd->sections;
2480 section != NULL;
2481 section = section->next)
2482 {
2483 if ((section->flags & SEC_CODE) != 0)
2484 input_list[section->index] = NULL;
2485 }
2486
2487 /* Now actually build the lists. */
2488 for (input_bfd = info->input_bfds;
2489 input_bfd != NULL;
2490 input_bfd = input_bfd->link_next)
2491 {
2492 for (section = input_bfd->sections;
2493 section != NULL;
2494 section = section->next)
2495 {
2496 if (section->output_section != NULL
2497 && section->output_section->owner == output_bfd
2498 && section->output_section->index <= top_index)
2499 {
2500 list = input_list + section->output_section->index;
2501 if (*list != bfd_abs_section_ptr)
2502 {
2503 /* Steal the link_sec pointer for our list. */
2504 #define PREV_SEC(sec) (hplink->stub_group[(sec)->id].link_sec)
2505 /* This happens to make the list in reverse order,
2506 which is what we want. */
2507 PREV_SEC (section) = *list;
2508 *list = section;
2509 }
2510 }
2511 }
2512 }
2513
2514 /* See whether we can group stub sections together. Grouping stub
2515 sections may result in fewer stubs. More importantly, we need to
2516 put all .init* and .fini* stubs at the beginning of the .init or
2517 .fini output sections respectively, because glibc splits the
2518 _init and _fini functions into multiple parts. Putting a stub in
2519 the middle of a function is not a good idea. */
2520 list = input_list + top_index;
2521 do
2522 {
2523 asection *tail = *list;
2524 if (tail == bfd_abs_section_ptr)
2525 continue;
2526 while (tail != NULL)
2527 {
2528 asection *curr;
2529 asection *prev;
2530 bfd_size_type total;
2531
2532 curr = tail;
2533 if (tail->_cooked_size)
2534 total = tail->_cooked_size;
2535 else
2536 total = tail->_raw_size;
2537 while ((prev = PREV_SEC (curr)) != NULL
2538 && ((total += curr->output_offset - prev->output_offset)
2539 < stub_group_size))
2540 curr = prev;
2541
2542 /* OK, the size from the start of CURR to the end is less
2543 than 250000 bytes and thus can be handled by one stub
2544 section. (or the tail section is itself larger than
2545 250000 bytes, in which case we may be toast.)
2546 We should really be keeping track of the total size of
2547 stubs added here, as stubs contribute to the final output
2548 section size. That's a little tricky, and this way will
2549 only break if stubs added total more than 12144 bytes, or
2550 1518 long branch stubs. It seems unlikely for more than
2551 1518 different functions to be called, especially from
2552 code only 250000 bytes long. */
2553 do
2554 {
2555 prev = PREV_SEC (tail);
2556 /* Set up this stub group. */
2557 hplink->stub_group[tail->id].link_sec = curr;
2558 }
2559 while (tail != curr && (tail = prev) != NULL);
2560
2561 /* But wait, there's more! Input sections up to 250000
2562 bytes before the stub section can be handled by it too. */
2563 if (!stubs_always_before_branch)
2564 {
2565 total = 0;
2566 while (prev != NULL
2567 && ((total += tail->output_offset - prev->output_offset)
2568 < stub_group_size))
2569 {
2570 tail = prev;
2571 prev = PREV_SEC (tail);
2572 hplink->stub_group[tail->id].link_sec = curr;
2573 }
2574 }
2575 tail = prev;
2576 }
2577 }
2578 while (list-- != input_list);
2579 free (input_list);
2580 #undef PREV_SEC
2581
2582 /* We want to read in symbol extension records only once. To do this
2583 we need to read in the local symbols in parallel and save them for
2584 later use; so hold pointers to the local symbols in an array. */
2585 all_local_syms
2586 = (Elf_Internal_Sym **) bfd_zmalloc (sizeof (Elf_Internal_Sym *)
2587 * bfd_count);
2588 if (all_local_syms == NULL)
2589 return false;
2590
2591 /* Walk over all the input BFDs, swapping in local symbols.
2592 If we are creating a shared library, create hash entries for the
2593 export stubs. */
2594 for (input_bfd = info->input_bfds, bfd_indx = 0;
2595 input_bfd != NULL;
2596 input_bfd = input_bfd->link_next, bfd_indx++)
2597 {
2598 Elf_Internal_Shdr *symtab_hdr;
2599 Elf_Internal_Sym *isym;
2600 Elf32_External_Sym *ext_syms, *esym, *end_sy;
2601
2602 /* We'll need the symbol table in a second. */
2603 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2604 if (symtab_hdr->sh_info == 0)
2605 continue;
2606
2607 /* We need an array of the local symbols attached to the input bfd.
2608 Unfortunately, we're going to have to read & swap them in. */
2609 local_syms = (Elf_Internal_Sym *)
2610 bfd_malloc (symtab_hdr->sh_info * sizeof (Elf_Internal_Sym));
2611 if (local_syms == NULL)
2612 {
2613 goto error_ret_free_local;
2614 }
2615 all_local_syms[bfd_indx] = local_syms;
2616 ext_syms = (Elf32_External_Sym *)
2617 bfd_malloc (symtab_hdr->sh_info * sizeof (Elf32_External_Sym));
2618 if (ext_syms == NULL)
2619 {
2620 goto error_ret_free_local;
2621 }
2622
2623 if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
2624 || (bfd_read (ext_syms, 1,
2625 (symtab_hdr->sh_info * sizeof (Elf32_External_Sym)),
2626 input_bfd)
2627 != (symtab_hdr->sh_info * sizeof (Elf32_External_Sym))))
2628 {
2629 free (ext_syms);
2630 goto error_ret_free_local;
2631 }
2632
2633 /* Swap the local symbols in. */
2634 isym = local_syms;
2635 esym = ext_syms;
2636 for (end_sy = esym + symtab_hdr->sh_info; esym < end_sy; esym++, isym++)
2637 bfd_elf32_swap_symbol_in (input_bfd, esym, isym);
2638
2639 /* Now we can free the external symbols. */
2640 free (ext_syms);
2641
2642 #if ! LONG_BRANCH_PIC_IN_SHLIB
2643 /* If this is a shared link, find all the stub reloc sections. */
2644 if (info->shared)
2645 for (section = input_bfd->sections;
2646 section != NULL;
2647 section = section->next)
2648 {
2649 char *name;
2650 asection *reloc_sec;
2651
2652 name = bfd_malloc (strlen (section->name)
2653 + sizeof STUB_SUFFIX
2654 + 5);
2655 if (name == NULL)
2656 return false;
2657 sprintf (name, ".rela%s%s", section->name, STUB_SUFFIX);
2658 reloc_sec = bfd_get_section_by_name (hplink->root.dynobj, name);
2659 hplink->stub_group[section->id].reloc_sec = reloc_sec;
2660 free (name);
2661 }
2662 #endif
2663
2664 if (info->shared && hplink->multi_subspace)
2665 {
2666 struct elf_link_hash_entry **sym_hashes;
2667 struct elf_link_hash_entry **end_hashes;
2668 unsigned int symcount;
2669
2670 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2671 - symtab_hdr->sh_info);
2672 sym_hashes = elf_sym_hashes (input_bfd);
2673 end_hashes = sym_hashes + symcount;
2674
2675 /* Look through the global syms for functions; We need to
2676 build export stubs for all globally visible functions. */
2677 for (; sym_hashes < end_hashes; sym_hashes++)
2678 {
2679 struct elf32_hppa_link_hash_entry *hash;
2680
2681 hash = (struct elf32_hppa_link_hash_entry *) *sym_hashes;
2682
2683 while (hash->elf.root.type == bfd_link_hash_indirect
2684 || hash->elf.root.type == bfd_link_hash_warning)
2685 hash = ((struct elf32_hppa_link_hash_entry *)
2686 hash->elf.root.u.i.link);
2687
2688 /* At this point in the link, undefined syms have been
2689 resolved, so we need to check that the symbol was
2690 defined in this BFD. */
2691 if ((hash->elf.root.type == bfd_link_hash_defined
2692 || hash->elf.root.type == bfd_link_hash_defweak)
2693 && hash->elf.type == STT_FUNC
2694 && hash->elf.root.u.def.section->output_section != NULL
2695 && (hash->elf.root.u.def.section->output_section->owner
2696 == output_bfd)
2697 && hash->elf.root.u.def.section->owner == input_bfd
2698 && (hash->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
2699 && !(hash->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)
2700 && ELF_ST_VISIBILITY (hash->elf.other) == STV_DEFAULT)
2701 {
2702 asection *sec;
2703 const char *stub_name;
2704 struct elf32_hppa_stub_hash_entry *stub_entry;
2705
2706 sec = hash->elf.root.u.def.section;
2707 stub_name = hash->elf.root.root.string;
2708 stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table,
2709 stub_name,
2710 false, false);
2711 if (stub_entry == NULL)
2712 {
2713 stub_entry = hppa_add_stub (stub_name, sec, hplink);
2714 if (!stub_entry)
2715 goto error_ret_free_local;
2716
2717 stub_entry->target_value = hash->elf.root.u.def.value;
2718 stub_entry->target_section = hash->elf.root.u.def.section;
2719 stub_entry->stub_type = hppa_stub_export;
2720 stub_entry->h = hash;
2721 stub_changed = 1;
2722 }
2723 else
2724 {
2725 (*_bfd_error_handler) (_("%s: duplicate export stub %s"),
2726 bfd_get_filename (input_bfd),
2727 stub_name);
2728 }
2729 }
2730 }
2731 }
2732 }
2733
2734 while (1)
2735 {
2736 asection *stub_sec;
2737
2738 for (input_bfd = info->input_bfds, bfd_indx = 0;
2739 input_bfd != NULL;
2740 input_bfd = input_bfd->link_next, bfd_indx++)
2741 {
2742 Elf_Internal_Shdr *symtab_hdr;
2743
2744 /* We'll need the symbol table in a second. */
2745 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2746 if (symtab_hdr->sh_info == 0)
2747 continue;
2748
2749 local_syms = all_local_syms[bfd_indx];
2750
2751 /* Walk over each section attached to the input bfd. */
2752 for (section = input_bfd->sections;
2753 section != NULL;
2754 section = section->next)
2755 {
2756 Elf_Internal_Shdr *input_rel_hdr;
2757 Elf32_External_Rela *external_relocs, *erelaend, *erela;
2758 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
2759
2760 /* If there aren't any relocs, then there's nothing more
2761 to do. */
2762 if ((section->flags & SEC_RELOC) == 0
2763 || section->reloc_count == 0)
2764 continue;
2765
2766 /* If this section is a link-once section that will be
2767 discarded, then don't create any stubs. */
2768 if (section->output_section == NULL
2769 || section->output_section->owner != output_bfd)
2770 continue;
2771
2772 /* Allocate space for the external relocations. */
2773 external_relocs
2774 = ((Elf32_External_Rela *)
2775 bfd_malloc (section->reloc_count
2776 * sizeof (Elf32_External_Rela)));
2777 if (external_relocs == NULL)
2778 {
2779 goto error_ret_free_local;
2780 }
2781
2782 /* Likewise for the internal relocations. */
2783 internal_relocs = ((Elf_Internal_Rela *)
2784 bfd_malloc (section->reloc_count
2785 * sizeof (Elf_Internal_Rela)));
2786 if (internal_relocs == NULL)
2787 {
2788 free (external_relocs);
2789 goto error_ret_free_local;
2790 }
2791
2792 /* Read in the external relocs. */
2793 input_rel_hdr = &elf_section_data (section)->rel_hdr;
2794 if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0
2795 || bfd_read (external_relocs, 1,
2796 input_rel_hdr->sh_size,
2797 input_bfd) != input_rel_hdr->sh_size)
2798 {
2799 free (external_relocs);
2800 error_ret_free_internal:
2801 free (internal_relocs);
2802 goto error_ret_free_local;
2803 }
2804
2805 /* Swap in the relocs. */
2806 erela = external_relocs;
2807 erelaend = erela + section->reloc_count;
2808 irela = internal_relocs;
2809 for (; erela < erelaend; erela++, irela++)
2810 bfd_elf32_swap_reloca_in (input_bfd, erela, irela);
2811
2812 /* We're done with the external relocs, free them. */
2813 free (external_relocs);
2814
2815 /* Now examine each relocation. */
2816 irela = internal_relocs;
2817 irelaend = irela + section->reloc_count;
2818 for (; irela < irelaend; irela++)
2819 {
2820 unsigned int r_type, r_indx;
2821 enum elf32_hppa_stub_type stub_type;
2822 struct elf32_hppa_stub_hash_entry *stub_entry;
2823 asection *sym_sec;
2824 bfd_vma sym_value;
2825 bfd_vma destination;
2826 struct elf32_hppa_link_hash_entry *hash;
2827 char *stub_name;
2828 const asection *id_sec;
2829
2830 r_type = ELF32_R_TYPE (irela->r_info);
2831 r_indx = ELF32_R_SYM (irela->r_info);
2832
2833 if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
2834 {
2835 bfd_set_error (bfd_error_bad_value);
2836 goto error_ret_free_internal;
2837 }
2838
2839 /* Only look for stubs on call instructions. */
2840 if (r_type != (unsigned int) R_PARISC_PCREL12F
2841 && r_type != (unsigned int) R_PARISC_PCREL17F
2842 && r_type != (unsigned int) R_PARISC_PCREL22F)
2843 continue;
2844
2845 /* Now determine the call target, its name, value,
2846 section. */
2847 sym_sec = NULL;
2848 sym_value = 0;
2849 destination = 0;
2850 hash = NULL;
2851 if (r_indx < symtab_hdr->sh_info)
2852 {
2853 /* It's a local symbol. */
2854 Elf_Internal_Sym *sym;
2855 Elf_Internal_Shdr *hdr;
2856
2857 sym = local_syms + r_indx;
2858 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
2859 sym_sec = hdr->bfd_section;
2860 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2861 sym_value = sym->st_value;
2862 destination = (sym_value + irela->r_addend
2863 + sym_sec->output_offset
2864 + sym_sec->output_section->vma);
2865 }
2866 else
2867 {
2868 /* It's an external symbol. */
2869 int e_indx;
2870
2871 e_indx = r_indx - symtab_hdr->sh_info;
2872 hash = ((struct elf32_hppa_link_hash_entry *)
2873 elf_sym_hashes (input_bfd)[e_indx]);
2874
2875 while (hash->elf.root.type == bfd_link_hash_indirect
2876 || hash->elf.root.type == bfd_link_hash_warning)
2877 hash = ((struct elf32_hppa_link_hash_entry *)
2878 hash->elf.root.u.i.link);
2879
2880 if (hash->elf.root.type == bfd_link_hash_defined
2881 || hash->elf.root.type == bfd_link_hash_defweak)
2882 {
2883 sym_sec = hash->elf.root.u.def.section;
2884 sym_value = hash->elf.root.u.def.value;
2885 if (sym_sec->output_section != NULL)
2886 destination = (sym_value + irela->r_addend
2887 + sym_sec->output_offset
2888 + sym_sec->output_section->vma);
2889 }
2890 else if (hash->elf.root.type == bfd_link_hash_undefweak)
2891 {
2892 if (! info->shared)
2893 continue;
2894 }
2895 else if (hash->elf.root.type == bfd_link_hash_undefined)
2896 {
2897 if (! (info->shared
2898 && !info->no_undefined
2899 && (ELF_ST_VISIBILITY (hash->elf.other)
2900 == STV_DEFAULT)))
2901 continue;
2902 }
2903 else
2904 {
2905 bfd_set_error (bfd_error_bad_value);
2906 goto error_ret_free_internal;
2907 }
2908 }
2909
2910 /* Determine what (if any) linker stub is needed. */
2911 stub_type = hppa_type_of_stub (section, irela, hash,
2912 destination);
2913 if (stub_type == hppa_stub_none)
2914 continue;
2915
2916 /* Support for grouping stub sections. */
2917 id_sec = hplink->stub_group[section->id].link_sec;
2918
2919 /* Get the name of this stub. */
2920 stub_name = hppa_stub_name (id_sec, sym_sec, hash, irela);
2921 if (!stub_name)
2922 goto error_ret_free_internal;
2923
2924 stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table,
2925 stub_name,
2926 false, false);
2927 if (stub_entry != NULL)
2928 {
2929 /* The proper stub has already been created. */
2930 free (stub_name);
2931 continue;
2932 }
2933
2934 stub_entry = hppa_add_stub (stub_name, section, hplink);
2935 if (stub_entry == NULL)
2936 {
2937 free (stub_name);
2938 goto error_ret_free_local;
2939 }
2940
2941 stub_entry->target_value = sym_value;
2942 stub_entry->target_section = sym_sec;
2943 stub_entry->stub_type = stub_type;
2944 if (info->shared)
2945 {
2946 if (stub_type == hppa_stub_import)
2947 stub_entry->stub_type = hppa_stub_import_shared;
2948 else if (stub_type == hppa_stub_long_branch
2949 && (LONG_BRANCH_PIC_IN_SHLIB || hash == NULL))
2950 stub_entry->stub_type = hppa_stub_long_branch_shared;
2951 }
2952 stub_entry->h = hash;
2953 stub_changed = 1;
2954 }
2955
2956 /* We're done with the internal relocs, free them. */
2957 free (internal_relocs);
2958 }
2959 }
2960
2961 if (!stub_changed)
2962 break;
2963
2964 /* OK, we've added some stubs. Find out the new size of the
2965 stub sections. */
2966 for (stub_sec = hplink->stub_bfd->sections;
2967 stub_sec != NULL;
2968 stub_sec = stub_sec->next)
2969 {
2970 stub_sec->_raw_size = 0;
2971 stub_sec->_cooked_size = 0;
2972 }
2973 #if ! LONG_BRANCH_PIC_IN_SHLIB
2974 {
2975 int i;
2976
2977 for (i = top_id; i >= 0; --i)
2978 {
2979 /* This will probably hit the same section many times.. */
2980 stub_sec = hplink->stub_group[i].reloc_sec;
2981 if (stub_sec != NULL)
2982 {
2983 stub_sec->_raw_size = 0;
2984 stub_sec->_cooked_size = 0;
2985 }
2986 }
2987 }
2988 #endif
2989
2990 bfd_hash_traverse (&hplink->stub_hash_table,
2991 hppa_size_one_stub,
2992 hplink);
2993
2994 /* Ask the linker to do its stuff. */
2995 (*hplink->layout_sections_again) ();
2996 stub_changed = 0;
2997 }
2998
2999 ret = 1;
3000
3001 error_ret_free_local:
3002 while (bfd_count-- > 0)
3003 if (all_local_syms[bfd_count])
3004 free (all_local_syms[bfd_count]);
3005 free (all_local_syms);
3006
3007 return ret;
3008 }
3009
3010 /* For a final link, this function is called after we have sized the
3011 stubs to provide a value for __gp. */
3012
3013 boolean
3014 elf32_hppa_set_gp (abfd, info)
3015 bfd *abfd;
3016 struct bfd_link_info *info;
3017 {
3018 struct elf32_hppa_link_hash_table *hplink;
3019 struct elf_link_hash_entry *h;
3020 asection *sec;
3021 bfd_vma gp_val;
3022
3023 hplink = hppa_link_hash_table (info);
3024 h = elf_link_hash_lookup (&hplink->root, "$global$",
3025 false, false, false);
3026
3027 if (h != NULL
3028 && (h->root.type == bfd_link_hash_defined
3029 || h->root.type == bfd_link_hash_defweak))
3030 {
3031 gp_val = h->root.u.def.value;
3032 sec = h->root.u.def.section;
3033 }
3034 else
3035 {
3036 /* Choose to point our LTP at, in this order, one of .plt, .got,
3037 or .data, if these sections exist. In the case of choosing
3038 .plt try to make the LTP ideal for addressing anywhere in the
3039 .plt or .got with a 14 bit signed offset. Typically, the end
3040 of the .plt is the start of the .got, so choose .plt + 0x2000
3041 if either the .plt or .got is larger than 0x2000. If both
3042 the .plt and .got are smaller than 0x2000, choose the end of
3043 the .plt section. */
3044
3045 sec = hplink->splt;
3046 if (sec != NULL)
3047 {
3048 gp_val = sec->_raw_size;
3049 if (gp_val > 0x2000
3050 || (hplink->sgot && hplink->sgot->_raw_size > 0x2000))
3051 {
3052 gp_val = 0x2000;
3053 }
3054 }
3055 else
3056 {
3057 gp_val = 0;
3058 sec = hplink->sgot;
3059 if (sec != NULL)
3060 {
3061 /* We know we don't have a .plt. If .got is large,
3062 offset our LTP. */
3063 if (sec->_raw_size > 0x2000)
3064 gp_val = 0x2000;
3065 }
3066 else
3067 {
3068 /* No .plt or .got. Who cares what the LTP is? */
3069 sec = bfd_get_section_by_name (abfd, ".data");
3070 }
3071 }
3072
3073 if (h != NULL)
3074 {
3075 h->root.type = bfd_link_hash_defined;
3076 h->root.u.def.value = gp_val;
3077 if (sec != NULL)
3078 h->root.u.def.section = sec;
3079 else
3080 h->root.u.def.section = bfd_abs_section_ptr;
3081 }
3082 }
3083
3084 if (sec != NULL)
3085 gp_val += sec->output_section->vma + sec->output_offset;
3086
3087 elf_gp (abfd) = gp_val;
3088 return true;
3089 }
3090
3091 /* Build all the stubs associated with the current output file. The
3092 stubs are kept in a hash table attached to the main linker hash
3093 table. We also set up the .plt entries for statically linked PIC
3094 functions here. This function is called via hppaelf_finish in the
3095 linker. */
3096
3097 boolean
3098 elf32_hppa_build_stubs (info)
3099 struct bfd_link_info *info;
3100 {
3101 asection *stub_sec;
3102 struct bfd_hash_table *table;
3103 struct elf32_hppa_link_hash_table *hplink;
3104
3105 hplink = hppa_link_hash_table (info);
3106
3107 for (stub_sec = hplink->stub_bfd->sections;
3108 stub_sec != NULL;
3109 stub_sec = stub_sec->next)
3110 {
3111 size_t size;
3112
3113 /* Allocate memory to hold the linker stubs. */
3114 size = stub_sec->_raw_size;
3115 stub_sec->contents = (unsigned char *) bfd_zalloc (hplink->stub_bfd,
3116 size);
3117 if (stub_sec->contents == NULL && size != 0)
3118 return false;
3119 stub_sec->_raw_size = 0;
3120 }
3121
3122 /* Build the stubs as directed by the stub hash table. */
3123 table = &hplink->stub_hash_table;
3124 bfd_hash_traverse (table, hppa_build_one_stub, info);
3125
3126 return true;
3127 }
3128
3129 /* Perform a final link. */
3130
3131 static boolean
3132 elf32_hppa_final_link (abfd, info)
3133 bfd *abfd;
3134 struct bfd_link_info *info;
3135 {
3136 asection *s;
3137
3138 /* Invoke the regular ELF garbage collecting linker to do all the
3139 work. */
3140 if (!_bfd_elf32_gc_common_final_link (abfd, info))
3141 return false;
3142
3143 /* If we're producing a final executable, sort the contents of the
3144 unwind section. Magic section names, but this is much safer than
3145 having elf32_hppa_relocate_section remember where SEGREL32 relocs
3146 occurred. Consider what happens if someone inept creates a
3147 linker script that puts unwind information in .text. */
3148 s = bfd_get_section_by_name (abfd, ".PARISC.unwind");
3149 if (s != NULL)
3150 {
3151 bfd_size_type size;
3152 char *contents;
3153
3154 size = s->_raw_size;
3155 contents = bfd_malloc (size);
3156 if (contents == NULL)
3157 return false;
3158
3159 if (! bfd_get_section_contents (abfd, s, contents, (file_ptr) 0, size))
3160 return false;
3161
3162 qsort (contents, size / 16, 16, hppa_unwind_entry_compare);
3163
3164 if (! bfd_set_section_contents (abfd, s, contents, (file_ptr) 0, size))
3165 return false;
3166 }
3167 return true;
3168 }
3169
3170 /* Record the lowest address for the data and text segments. */
3171
3172 static void
3173 hppa_record_segment_addr (abfd, section, data)
3174 bfd *abfd ATTRIBUTE_UNUSED;
3175 asection *section;
3176 PTR data;
3177 {
3178 struct elf32_hppa_link_hash_table *hplink;
3179
3180 hplink = (struct elf32_hppa_link_hash_table *) data;
3181
3182 if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3183 {
3184 bfd_vma value = section->vma - section->filepos;
3185
3186 if ((section->flags & SEC_READONLY) != 0)
3187 {
3188 if (value < hplink->text_segment_base)
3189 hplink->text_segment_base = value;
3190 }
3191 else
3192 {
3193 if (value < hplink->data_segment_base)
3194 hplink->data_segment_base = value;
3195 }
3196 }
3197 }
3198
3199 /* Perform a relocation as part of a final link. */
3200
3201 static bfd_reloc_status_type
3202 final_link_relocate (input_section, contents, rel, value, hplink, sym_sec, h)
3203 asection *input_section;
3204 bfd_byte *contents;
3205 const Elf_Internal_Rela *rel;
3206 bfd_vma value;
3207 struct elf32_hppa_link_hash_table *hplink;
3208 asection *sym_sec;
3209 struct elf32_hppa_link_hash_entry *h;
3210 {
3211 int insn;
3212 unsigned int r_type = ELF32_R_TYPE (rel->r_info);
3213 reloc_howto_type *howto = elf_hppa_howto_table + r_type;
3214 int r_format = howto->bitsize;
3215 enum hppa_reloc_field_selector_type_alt r_field;
3216 bfd *input_bfd = input_section->owner;
3217 bfd_vma offset = rel->r_offset;
3218 bfd_vma max_branch_offset = 0;
3219 bfd_byte *hit_data = contents + offset;
3220 bfd_signed_vma addend = rel->r_addend;
3221 bfd_vma location;
3222 struct elf32_hppa_stub_hash_entry *stub_entry = NULL;
3223 int val;
3224
3225 if (r_type == R_PARISC_NONE)
3226 return bfd_reloc_ok;
3227
3228 insn = bfd_get_32 (input_bfd, hit_data);
3229
3230 /* Find out where we are and where we're going. */
3231 location = (offset +
3232 input_section->output_offset +
3233 input_section->output_section->vma);
3234
3235 switch (r_type)
3236 {
3237 case R_PARISC_PCREL12F:
3238 case R_PARISC_PCREL17F:
3239 case R_PARISC_PCREL22F:
3240 /* If this is a call to a function defined in another dynamic
3241 library, or if it is a call to a PIC function in the same
3242 object, or if this is a shared link and it is a call to a
3243 weak symbol which may or may not be in the same object, then
3244 find the import stub in the stub hash. */
3245 if (sym_sec == NULL
3246 || sym_sec->output_section == NULL
3247 || (h != NULL &&
3248 (h->pic_call
3249 || (h->elf.root.type == bfd_link_hash_defweak
3250 && h->elf.dynindx != -1
3251 && h->elf.plt.offset != (bfd_vma) -1))))
3252 {
3253 stub_entry = hppa_get_stub_entry (input_section, sym_sec,
3254 h, rel, hplink);
3255 if (stub_entry != NULL)
3256 {
3257 value = (stub_entry->stub_offset
3258 + stub_entry->stub_sec->output_offset
3259 + stub_entry->stub_sec->output_section->vma);
3260 addend = 0;
3261 }
3262 else if (sym_sec == NULL && h != NULL
3263 && h->elf.root.type == bfd_link_hash_undefweak)
3264 {
3265 /* It's OK if undefined weak. Make undefined weak
3266 branches go nowhere. */
3267 value = location;
3268 addend = 0;
3269 }
3270 else
3271 return bfd_reloc_notsupported;
3272 }
3273 /* Fall thru. */
3274
3275 case R_PARISC_PCREL21L:
3276 case R_PARISC_PCREL17C:
3277 case R_PARISC_PCREL17R:
3278 case R_PARISC_PCREL14R:
3279 case R_PARISC_PCREL14F:
3280 /* Make it a pc relative offset. */
3281 value -= location;
3282 addend -= 8;
3283 break;
3284
3285 case R_PARISC_DPREL21L:
3286 case R_PARISC_DPREL14R:
3287 case R_PARISC_DPREL14F:
3288 /* For all the DP relative relocations, we need to examine the symbol's
3289 section. If it's a code section, then "data pointer relative" makes
3290 no sense. In that case we don't adjust the "value", and for 21 bit
3291 addil instructions, we change the source addend register from %dp to
3292 %r0. This situation commonly arises when a variable's "constness"
3293 is declared differently from the way the variable is defined. For
3294 instance: "extern int foo" with foo defined as "const int foo". */
3295 if (sym_sec == NULL)
3296 break;
3297 if ((sym_sec->flags & SEC_CODE) != 0)
3298 {
3299 if ((insn & ((0x3f << 26) | (0x1f << 21)))
3300 == (((int) OP_ADDIL << 26) | (27 << 21)))
3301 {
3302 insn &= ~ (0x1f << 21);
3303 #if 1 /* debug them. */
3304 (*_bfd_error_handler)
3305 (_("%s(%s+0x%lx): fixing %s"),
3306 bfd_get_filename (input_bfd),
3307 input_section->name,
3308 (long) rel->r_offset,
3309 howto->name);
3310 #endif
3311 }
3312 /* Now try to make things easy for the dynamic linker. */
3313
3314 break;
3315 }
3316 /* Fall thru. */
3317
3318 case R_PARISC_DLTIND21L:
3319 case R_PARISC_DLTIND14R:
3320 case R_PARISC_DLTIND14F:
3321 value -= elf_gp (input_section->output_section->owner);
3322 break;
3323
3324 case R_PARISC_SEGREL32:
3325 if ((sym_sec->flags & SEC_CODE) != 0)
3326 value -= hplink->text_segment_base;
3327 else
3328 value -= hplink->data_segment_base;
3329 break;
3330
3331 default:
3332 break;
3333 }
3334
3335 switch (r_type)
3336 {
3337 case R_PARISC_DIR32:
3338 case R_PARISC_DIR14F:
3339 case R_PARISC_DIR17F:
3340 case R_PARISC_PCREL17C:
3341 case R_PARISC_PCREL14F:
3342 case R_PARISC_DPREL14F:
3343 case R_PARISC_PLABEL32:
3344 case R_PARISC_DLTIND14F:
3345 case R_PARISC_SEGBASE:
3346 case R_PARISC_SEGREL32:
3347 r_field = e_fsel;
3348 break;
3349
3350 case R_PARISC_DIR21L:
3351 case R_PARISC_PCREL21L:
3352 case R_PARISC_DPREL21L:
3353 case R_PARISC_PLABEL21L:
3354 case R_PARISC_DLTIND21L:
3355 r_field = e_lrsel;
3356 break;
3357
3358 case R_PARISC_DIR17R:
3359 case R_PARISC_PCREL17R:
3360 case R_PARISC_DIR14R:
3361 case R_PARISC_PCREL14R:
3362 case R_PARISC_DPREL14R:
3363 case R_PARISC_PLABEL14R:
3364 case R_PARISC_DLTIND14R:
3365 r_field = e_rrsel;
3366 break;
3367
3368 case R_PARISC_PCREL12F:
3369 case R_PARISC_PCREL17F:
3370 case R_PARISC_PCREL22F:
3371 r_field = e_fsel;
3372
3373 if (r_type == (unsigned int) R_PARISC_PCREL17F)
3374 {
3375 max_branch_offset = (1 << (17-1)) << 2;
3376 }
3377 else if (r_type == (unsigned int) R_PARISC_PCREL12F)
3378 {
3379 max_branch_offset = (1 << (12-1)) << 2;
3380 }
3381 else
3382 {
3383 max_branch_offset = (1 << (22-1)) << 2;
3384 }
3385
3386 /* sym_sec is NULL on undefined weak syms or when shared on
3387 undefined syms. We've already checked for a stub for the
3388 shared undefined case. */
3389 if (sym_sec == NULL)
3390 break;
3391
3392 /* If the branch is out of reach, then redirect the
3393 call to the local stub for this function. */
3394 if (value + addend + max_branch_offset >= 2*max_branch_offset)
3395 {
3396 stub_entry = hppa_get_stub_entry (input_section, sym_sec,
3397 h, rel, hplink);
3398 if (stub_entry == NULL)
3399 return bfd_reloc_notsupported;
3400
3401 /* Munge up the value and addend so that we call the stub
3402 rather than the procedure directly. */
3403 value = (stub_entry->stub_offset
3404 + stub_entry->stub_sec->output_offset
3405 + stub_entry->stub_sec->output_section->vma
3406 - location);
3407 addend = -8;
3408 }
3409 break;
3410
3411 /* Something we don't know how to handle. */
3412 default:
3413 return bfd_reloc_notsupported;
3414 }
3415
3416 /* Make sure we can reach the stub. */
3417 if (max_branch_offset != 0
3418 && value + addend + max_branch_offset >= 2*max_branch_offset)
3419 {
3420 (*_bfd_error_handler)
3421 (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
3422 bfd_get_filename (input_bfd),
3423 input_section->name,
3424 (long) rel->r_offset,
3425 stub_entry->root.string);
3426 return bfd_reloc_notsupported;
3427 }
3428
3429 val = hppa_field_adjust (value, addend, r_field);
3430
3431 switch (r_type)
3432 {
3433 case R_PARISC_PCREL12F:
3434 case R_PARISC_PCREL17C:
3435 case R_PARISC_PCREL17F:
3436 case R_PARISC_PCREL17R:
3437 case R_PARISC_PCREL22F:
3438 case R_PARISC_DIR17F:
3439 case R_PARISC_DIR17R:
3440 /* This is a branch. Divide the offset by four.
3441 Note that we need to decide whether it's a branch or
3442 otherwise by inspecting the reloc. Inspecting insn won't
3443 work as insn might be from a .word directive. */
3444 val >>= 2;
3445 break;
3446
3447 default:
3448 break;
3449 }
3450
3451 insn = hppa_rebuild_insn (insn, val, r_format);
3452
3453 /* Update the instruction word. */
3454 bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data);
3455 return bfd_reloc_ok;
3456 }
3457
3458 /* Relocate an HPPA ELF section. */
3459
3460 static boolean
3461 elf32_hppa_relocate_section (output_bfd, info, input_bfd, input_section,
3462 contents, relocs, local_syms, local_sections)
3463 bfd *output_bfd;
3464 struct bfd_link_info *info;
3465 bfd *input_bfd;
3466 asection *input_section;
3467 bfd_byte *contents;
3468 Elf_Internal_Rela *relocs;
3469 Elf_Internal_Sym *local_syms;
3470 asection **local_sections;
3471 {
3472 bfd *dynobj;
3473 bfd_vma *local_got_offsets;
3474 struct elf32_hppa_link_hash_table *hplink;
3475 Elf_Internal_Shdr *symtab_hdr;
3476 Elf_Internal_Rela *rel;
3477 Elf_Internal_Rela *relend;
3478 asection *sreloc;
3479
3480 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3481
3482 hplink = hppa_link_hash_table (info);
3483 dynobj = hplink->root.dynobj;
3484 local_got_offsets = elf_local_got_offsets (input_bfd);
3485 sreloc = NULL;
3486
3487 rel = relocs;
3488 relend = relocs + input_section->reloc_count;
3489 for (; rel < relend; rel++)
3490 {
3491 unsigned int r_type;
3492 reloc_howto_type *howto;
3493 unsigned int r_symndx;
3494 struct elf32_hppa_link_hash_entry *h;
3495 Elf_Internal_Sym *sym;
3496 asection *sym_sec;
3497 bfd_vma relocation;
3498 bfd_reloc_status_type r;
3499 const char *sym_name;
3500 boolean plabel;
3501
3502 r_type = ELF32_R_TYPE (rel->r_info);
3503 if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
3504 {
3505 bfd_set_error (bfd_error_bad_value);
3506 return false;
3507 }
3508 if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY
3509 || r_type == (unsigned int) R_PARISC_GNU_VTINHERIT)
3510 continue;
3511
3512 r_symndx = ELF32_R_SYM (rel->r_info);
3513
3514 if (info->relocateable)
3515 {
3516 /* This is a relocateable link. We don't have to change
3517 anything, unless the reloc is against a section symbol,
3518 in which case we have to adjust according to where the
3519 section symbol winds up in the output section. */
3520 if (r_symndx < symtab_hdr->sh_info)
3521 {
3522 sym = local_syms + r_symndx;
3523 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3524 {
3525 sym_sec = local_sections[r_symndx];
3526 rel->r_addend += sym_sec->output_offset;
3527 }
3528 }
3529 continue;
3530 }
3531
3532 /* This is a final link. */
3533 h = NULL;
3534 sym = NULL;
3535 sym_sec = NULL;
3536 if (r_symndx < symtab_hdr->sh_info)
3537 {
3538 /* This is a local symbol, h defaults to NULL. */
3539 sym = local_syms + r_symndx;
3540 sym_sec = local_sections[r_symndx];
3541 relocation = ((ELF_ST_TYPE (sym->st_info) == STT_SECTION
3542 ? 0 : sym->st_value)
3543 + sym_sec->output_offset
3544 + sym_sec->output_section->vma);
3545 }
3546 else
3547 {
3548 int indx;
3549
3550 /* It's a global; Find its entry in the link hash. */
3551 indx = r_symndx - symtab_hdr->sh_info;
3552 h = ((struct elf32_hppa_link_hash_entry *)
3553 elf_sym_hashes (input_bfd)[indx]);
3554 while (h->elf.root.type == bfd_link_hash_indirect
3555 || h->elf.root.type == bfd_link_hash_warning)
3556 h = (struct elf32_hppa_link_hash_entry *) h->elf.root.u.i.link;
3557
3558 relocation = 0;
3559 if (h->elf.root.type == bfd_link_hash_defined
3560 || h->elf.root.type == bfd_link_hash_defweak)
3561 {
3562 sym_sec = h->elf.root.u.def.section;
3563 /* If sym_sec->output_section is NULL, then it's a
3564 symbol defined in a shared library. */
3565 if (sym_sec->output_section != NULL)
3566 relocation = (h->elf.root.u.def.value
3567 + sym_sec->output_offset
3568 + sym_sec->output_section->vma);
3569 }
3570 else if (h->elf.root.type == bfd_link_hash_undefweak)
3571 ;
3572 else if (info->shared && !info->no_undefined
3573 && ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT)
3574 {
3575 if (info->symbolic)
3576 if (!((*info->callbacks->undefined_symbol)
3577 (info, h->elf.root.root.string, input_bfd,
3578 input_section, rel->r_offset, false)))
3579 return false;
3580 }
3581 else
3582 {
3583 if (!((*info->callbacks->undefined_symbol)
3584 (info, h->elf.root.root.string, input_bfd,
3585 input_section, rel->r_offset, true)))
3586 return false;
3587 }
3588 }
3589
3590 /* Do any required modifications to the relocation value, and
3591 determine what types of dynamic info we need to output, if
3592 any. */
3593 plabel = 0;
3594 switch (r_type)
3595 {
3596 case R_PARISC_DLTIND14F:
3597 case R_PARISC_DLTIND14R:
3598 case R_PARISC_DLTIND21L:
3599 /* Relocation is to the entry for this symbol in the global
3600 offset table. */
3601 if (h != NULL)
3602 {
3603 bfd_vma off;
3604
3605 off = h->elf.got.offset;
3606 BFD_ASSERT (off != (bfd_vma) -1);
3607
3608 if (! hplink->root.dynamic_sections_created
3609 || (info->shared
3610 && (info->symbolic || h->elf.dynindx == -1)
3611 && (h->elf.elf_link_hash_flags
3612 & ELF_LINK_HASH_DEF_REGULAR) != 0))
3613 {
3614 /* This is actually a static link, or it is a
3615 -Bsymbolic link and the symbol is defined
3616 locally, or the symbol was forced to be local
3617 because of a version file. We must initialize
3618 this entry in the global offset table. Since the
3619 offset must always be a multiple of 4, we use the
3620 least significant bit to record whether we have
3621 initialized it already.
3622
3623 When doing a dynamic link, we create a .rela.got
3624 relocation entry to initialize the value. This
3625 is done in the finish_dynamic_symbol routine. */
3626 if ((off & 1) != 0)
3627 off &= ~1;
3628 else
3629 {
3630 bfd_put_32 (output_bfd, relocation,
3631 hplink->sgot->contents + off);
3632 h->elf.got.offset |= 1;
3633 }
3634 }
3635
3636 relocation = off;
3637 }
3638 else
3639 {
3640 /* Local symbol case. */
3641 bfd_vma off;
3642
3643 BFD_ASSERT (local_got_offsets != NULL
3644 && local_got_offsets[r_symndx] != (bfd_vma) -1);
3645
3646 off = local_got_offsets[r_symndx];
3647
3648 /* The offset must always be a multiple of 4. We use
3649 the least significant bit to record whether we have
3650 already generated the necessary reloc. */
3651 if ((off & 1) != 0)
3652 off &= ~1;
3653 else
3654 {
3655 bfd_put_32 (output_bfd, relocation,
3656 hplink->sgot->contents + off);
3657
3658 if (info->shared)
3659 {
3660 /* Output a dynamic *ABS* relocation for this
3661 GOT entry. In this case it is relative to
3662 the base of the object because the symbol
3663 index is zero. */
3664 Elf_Internal_Rela outrel;
3665 asection *srelgot = hplink->srelgot;
3666
3667 outrel.r_offset = (off
3668 + hplink->sgot->output_offset
3669 + hplink->sgot->output_section->vma);
3670 outrel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
3671 outrel.r_addend = relocation;
3672 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
3673 ((Elf32_External_Rela *)
3674 srelgot->contents
3675 + srelgot->reloc_count));
3676 ++srelgot->reloc_count;
3677 }
3678
3679 local_got_offsets[r_symndx] |= 1;
3680 }
3681
3682 relocation = off;
3683 }
3684
3685 /* Add the base of the GOT to the relocation value. */
3686 relocation += (hplink->sgot->output_offset
3687 + hplink->sgot->output_section->vma);
3688 break;
3689
3690 case R_PARISC_SEGREL32:
3691 /* If this is the first SEGREL relocation, then initialize
3692 the segment base values. */
3693 if (hplink->text_segment_base == (bfd_vma) -1)
3694 bfd_map_over_sections (output_bfd,
3695 hppa_record_segment_addr,
3696 hplink);
3697 break;
3698
3699 case R_PARISC_PLABEL14R:
3700 case R_PARISC_PLABEL21L:
3701 case R_PARISC_PLABEL32:
3702 if (hplink->root.dynamic_sections_created)
3703 {
3704 bfd_vma off;
3705
3706 /* If we have a global symbol with a PLT slot, then
3707 redirect this relocation to it. */
3708 if (h != NULL)
3709 {
3710 off = h->elf.plt.offset;
3711 }
3712 else
3713 {
3714 int indx;
3715
3716 indx = r_symndx + symtab_hdr->sh_info;
3717 off = local_got_offsets[indx];
3718
3719 /* As for the local .got entry case, we use the last
3720 bit to record whether we've already initialised
3721 this local .plt entry. */
3722 if ((off & 1) != 0)
3723 off &= ~1;
3724 else
3725 {
3726 bfd_put_32 (output_bfd,
3727 relocation,
3728 hplink->splt->contents + off);
3729 bfd_put_32 (output_bfd,
3730 elf_gp (hplink->splt->output_section->owner),
3731 hplink->splt->contents + off + 4);
3732
3733 if (info->shared)
3734 {
3735 /* Output a dynamic IPLT relocation for this
3736 PLT entry. */
3737 Elf_Internal_Rela outrel;
3738 asection *srelplt = hplink->srelplt;
3739
3740 outrel.r_offset = (off
3741 + hplink->splt->output_offset
3742 + hplink->splt->output_section->vma);
3743 outrel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
3744 outrel.r_addend = relocation;
3745 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
3746 ((Elf32_External_Rela *)
3747 srelplt->contents
3748 + srelplt->reloc_count));
3749 ++srelplt->reloc_count;
3750 }
3751
3752 local_got_offsets[indx] |= 1;
3753 }
3754 }
3755
3756 BFD_ASSERT (off < (bfd_vma) -2);
3757
3758 /* PLABELs contain function pointers. Relocation is to
3759 the entry for the function in the .plt. The magic +2
3760 offset signals to $$dyncall that the function pointer
3761 is in the .plt and thus has a gp pointer too.
3762 Exception: Undefined PLABELs should have a value of
3763 zero. */
3764 if (h == NULL
3765 || (h->elf.root.type != bfd_link_hash_undefweak
3766 && h->elf.root.type != bfd_link_hash_undefined))
3767 {
3768 relocation = (off
3769 + hplink->splt->output_offset
3770 + hplink->splt->output_section->vma
3771 + 2);
3772 }
3773 plabel = 1;
3774 }
3775 /* Fall through and possibly emit a dynamic relocation. */
3776
3777 case R_PARISC_DIR17F:
3778 case R_PARISC_DIR17R:
3779 case R_PARISC_DIR14F:
3780 case R_PARISC_DIR14R:
3781 case R_PARISC_DIR21L:
3782 case R_PARISC_DPREL14F:
3783 case R_PARISC_DPREL14R:
3784 case R_PARISC_DPREL21L:
3785 case R_PARISC_DIR32:
3786 /* The reloc types handled here and this conditional
3787 expression must match the code in check_relocs and
3788 hppa_discard_copies. ie. We need exactly the same
3789 condition as in check_relocs, with some extra conditions
3790 (dynindx test in this case) to cater for relocs removed
3791 by hppa_discard_copies. */
3792 if ((input_section->flags & SEC_ALLOC) != 0
3793 && info->shared
3794 #if RELATIVE_DYNAMIC_RELOCS
3795 && (is_absolute_reloc (r_type)
3796 || ((!info->symbolic
3797 || (h != NULL
3798 && ((h->elf.elf_link_hash_flags
3799 & ELF_LINK_HASH_DEF_REGULAR) == 0
3800 || h->elf.root.type == bfd_link_hash_defweak)))
3801 && (h == NULL || h->elf.dynindx != -1)))
3802 #endif
3803 )
3804 {
3805 Elf_Internal_Rela outrel;
3806 boolean skip;
3807
3808 /* When generating a shared object, these relocations
3809 are copied into the output file to be resolved at run
3810 time. */
3811
3812 if (sreloc == NULL)
3813 {
3814 const char *name;
3815
3816 name = (bfd_elf_string_from_elf_section
3817 (input_bfd,
3818 elf_elfheader (input_bfd)->e_shstrndx,
3819 elf_section_data (input_section)->rel_hdr.sh_name));
3820 if (name == NULL)
3821 return false;
3822 sreloc = bfd_get_section_by_name (dynobj, name);
3823 BFD_ASSERT (sreloc != NULL);
3824 }
3825
3826 outrel.r_offset = rel->r_offset;
3827 outrel.r_addend = rel->r_addend;
3828 skip = false;
3829 if (elf_section_data (input_section)->stab_info != NULL)
3830 {
3831 bfd_vma off;
3832
3833 off = (_bfd_stab_section_offset
3834 (output_bfd, &hplink->root.stab_info,
3835 input_section,
3836 &elf_section_data (input_section)->stab_info,
3837 rel->r_offset));
3838 if (off == (bfd_vma) -1)
3839 skip = true;
3840 outrel.r_offset = off;
3841 }
3842
3843 outrel.r_offset += (input_section->output_offset
3844 + input_section->output_section->vma);
3845
3846 if (skip)
3847 {
3848 memset (&outrel, 0, sizeof (outrel));
3849 }
3850 else if (h != NULL
3851 && h->elf.dynindx != -1
3852 && (plabel
3853 || !info->symbolic
3854 || (h->elf.elf_link_hash_flags
3855 & ELF_LINK_HASH_DEF_REGULAR) == 0))
3856 {
3857 outrel.r_info = ELF32_R_INFO (h->elf.dynindx, r_type);
3858 }
3859 else /* It's a local symbol, or one marked to become local. */
3860 {
3861 int indx = 0;
3862
3863 /* Add the absolute offset of the symbol. */
3864 outrel.r_addend += relocation;
3865
3866 /* Global plabels need to be processed by the
3867 dynamic linker so that functions have at most one
3868 fptr. For this reason, we need to differentiate
3869 between global and local plabels, which we do by
3870 providing the function symbol for a global plabel
3871 reloc, and no symbol for local plabels. */
3872 if (! plabel
3873 && sym_sec != NULL
3874 && sym_sec->output_section != NULL
3875 && ! bfd_is_abs_section (sym_sec))
3876 {
3877 indx = elf_section_data (sym_sec->output_section)->dynindx;
3878 /* We are turning this relocation into one
3879 against a section symbol, so subtract out the
3880 output section's address but not the offset
3881 of the input section in the output section. */
3882 outrel.r_addend -= sym_sec->output_section->vma;
3883 }
3884
3885 outrel.r_info = ELF32_R_INFO (indx, r_type);
3886 }
3887
3888 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
3889 ((Elf32_External_Rela *)
3890 sreloc->contents
3891 + sreloc->reloc_count));
3892 ++sreloc->reloc_count;
3893 }
3894 break;
3895
3896 default:
3897 break;
3898 }
3899
3900 r = final_link_relocate (input_section, contents, rel, relocation,
3901 hplink, sym_sec, h);
3902
3903 if (r == bfd_reloc_ok)
3904 continue;
3905
3906 if (h != NULL)
3907 sym_name = h->elf.root.root.string;
3908 else
3909 {
3910 sym_name = bfd_elf_string_from_elf_section (input_bfd,
3911 symtab_hdr->sh_link,
3912 sym->st_name);
3913 if (sym_name == NULL)
3914 return false;
3915 if (*sym_name == '\0')
3916 sym_name = bfd_section_name (input_bfd, sym_sec);
3917 }
3918
3919 howto = elf_hppa_howto_table + r_type;
3920
3921 if (r == bfd_reloc_undefined || r == bfd_reloc_notsupported)
3922 {
3923 (*_bfd_error_handler)
3924 (_("%s(%s+0x%lx): cannot handle %s for %s"),
3925 bfd_get_filename (input_bfd),
3926 input_section->name,
3927 (long) rel->r_offset,
3928 howto->name,
3929 sym_name);
3930 }
3931 else
3932 {
3933 if (!((*info->callbacks->reloc_overflow)
3934 (info, sym_name, howto->name, (bfd_vma) 0,
3935 input_bfd, input_section, rel->r_offset)))
3936 return false;
3937 }
3938 }
3939
3940 return true;
3941 }
3942
3943 /* Comparison function for qsort to sort unwind section during a
3944 final link. */
3945
3946 static int
3947 hppa_unwind_entry_compare (a, b)
3948 const PTR a;
3949 const PTR b;
3950 {
3951 const bfd_byte *ap, *bp;
3952 unsigned long av, bv;
3953
3954 ap = (const bfd_byte *) a;
3955 av = (unsigned long) ap[0] << 24;
3956 av |= (unsigned long) ap[1] << 16;
3957 av |= (unsigned long) ap[2] << 8;
3958 av |= (unsigned long) ap[3];
3959
3960 bp = (const bfd_byte *) b;
3961 bv = (unsigned long) bp[0] << 24;
3962 bv |= (unsigned long) bp[1] << 16;
3963 bv |= (unsigned long) bp[2] << 8;
3964 bv |= (unsigned long) bp[3];
3965
3966 return av < bv ? -1 : av > bv ? 1 : 0;
3967 }
3968
3969 /* Finish up dynamic symbol handling. We set the contents of various
3970 dynamic sections here. */
3971
3972 static boolean
3973 elf32_hppa_finish_dynamic_symbol (output_bfd, info, h, sym)
3974 bfd *output_bfd;
3975 struct bfd_link_info *info;
3976 struct elf_link_hash_entry *h;
3977 Elf_Internal_Sym *sym;
3978 {
3979 struct elf32_hppa_link_hash_table *hplink;
3980 bfd *dynobj;
3981
3982 hplink = hppa_link_hash_table (info);
3983 dynobj = hplink->root.dynobj;
3984
3985 if (h->plt.offset != (bfd_vma) -1)
3986 {
3987 bfd_vma value;
3988
3989 /* This symbol has an entry in the procedure linkage table. Set
3990 it up.
3991
3992 The format of a plt entry is
3993 <funcaddr>
3994 <__gp>
3995 */
3996 value = 0;
3997 if (h->root.type == bfd_link_hash_defined
3998 || h->root.type == bfd_link_hash_defweak)
3999 {
4000 value = h->root.u.def.value;
4001 if (h->root.u.def.section->output_section != NULL)
4002 value += (h->root.u.def.section->output_offset
4003 + h->root.u.def.section->output_section->vma);
4004 }
4005
4006 if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call)
4007 {
4008 Elf_Internal_Rela rel;
4009
4010 /* Create a dynamic IPLT relocation for this entry. */
4011 rel.r_offset = (h->plt.offset
4012 + hplink->splt->output_offset
4013 + hplink->splt->output_section->vma);
4014 if (! ((struct elf32_hppa_link_hash_entry *) h)->plt_abs
4015 && h->dynindx != -1)
4016 {
4017 /* To support lazy linking, the function pointer is
4018 initialised to point to a special stub stored at the
4019 end of the .plt. This is only done for plt entries
4020 with a non-*ABS* dynamic relocation. */
4021 value = (hplink->splt->output_offset
4022 + hplink->splt->output_section->vma
4023 + hplink->splt->_raw_size
4024 - sizeof (plt_stub)
4025 + PLT_STUB_ENTRY);
4026 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_IPLT);
4027 rel.r_addend = 0;
4028 }
4029 else
4030 {
4031 /* This symbol has been marked to become local, and is
4032 used by a plabel so must be kept in the .plt. */
4033 rel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
4034 rel.r_addend = value;
4035 }
4036
4037 bfd_elf32_swap_reloca_out (hplink->splt->output_section->owner,
4038 &rel,
4039 ((Elf32_External_Rela *)
4040 hplink->srelplt->contents
4041 + hplink->srelplt->reloc_count));
4042 hplink->srelplt->reloc_count++;
4043 }
4044
4045 bfd_put_32 (hplink->splt->owner,
4046 value,
4047 hplink->splt->contents + h->plt.offset);
4048 bfd_put_32 (hplink->splt->owner,
4049 elf_gp (hplink->splt->output_section->owner),
4050 hplink->splt->contents + h->plt.offset + 4);
4051 if (PLABEL_PLT_ENTRY_SIZE != PLT_ENTRY_SIZE
4052 && ((struct elf32_hppa_link_hash_entry *) h)->plabel
4053 && h->dynindx != -1)
4054 {
4055 memset (hplink->splt->contents + h->plt.offset + 8,
4056 0, PLABEL_PLT_ENTRY_SIZE - PLT_ENTRY_SIZE);
4057 }
4058
4059 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4060 {
4061 /* Mark the symbol as undefined, rather than as defined in
4062 the .plt section. Leave the value alone. */
4063 sym->st_shndx = SHN_UNDEF;
4064 }
4065 }
4066
4067 if (h->got.offset != (bfd_vma) -1)
4068 {
4069 Elf_Internal_Rela rel;
4070
4071 /* This symbol has an entry in the global offset table. Set it
4072 up. */
4073
4074 rel.r_offset = ((h->got.offset &~ (bfd_vma) 1)
4075 + hplink->sgot->output_offset
4076 + hplink->sgot->output_section->vma);
4077
4078 /* If this is a static link, or it is a -Bsymbolic link and the
4079 symbol is defined locally or was forced to be local because
4080 of a version file, we just want to emit a RELATIVE reloc.
4081 The entry in the global offset table will already have been
4082 initialized in the relocate_section function. */
4083 if (! hplink->root.dynamic_sections_created
4084 || (info->shared
4085 && (info->symbolic || h->dynindx == -1)
4086 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
4087 {
4088 rel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
4089 rel.r_addend = (h->root.u.def.value
4090 + h->root.u.def.section->output_offset
4091 + h->root.u.def.section->output_section->vma);
4092 }
4093 else
4094 {
4095 BFD_ASSERT((h->got.offset & 1) == 0);
4096 bfd_put_32 (output_bfd, (bfd_vma) 0,
4097 hplink->sgot->contents + h->got.offset);
4098 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_DIR32);
4099 rel.r_addend = 0;
4100 }
4101
4102 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4103 ((Elf32_External_Rela *)
4104 hplink->srelgot->contents
4105 + hplink->srelgot->reloc_count));
4106 ++hplink->srelgot->reloc_count;
4107 }
4108
4109 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4110 {
4111 asection *s;
4112 Elf_Internal_Rela rel;
4113
4114 /* This symbol needs a copy reloc. Set it up. */
4115
4116 BFD_ASSERT (h->dynindx != -1
4117 && (h->root.type == bfd_link_hash_defined
4118 || h->root.type == bfd_link_hash_defweak));
4119
4120 s = hplink->srelbss;
4121
4122 rel.r_offset = (h->root.u.def.value
4123 + h->root.u.def.section->output_offset
4124 + h->root.u.def.section->output_section->vma);
4125 rel.r_addend = 0;
4126 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_COPY);
4127 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4128 ((Elf32_External_Rela *) s->contents
4129 + s->reloc_count));
4130 ++s->reloc_count;
4131 }
4132
4133 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4134 if (h->root.root.string[0] == '_'
4135 && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4136 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0))
4137 {
4138 sym->st_shndx = SHN_ABS;
4139 }
4140
4141 return true;
4142 }
4143
4144 /* Finish up the dynamic sections. */
4145
4146 static boolean
4147 elf32_hppa_finish_dynamic_sections (output_bfd, info)
4148 bfd *output_bfd;
4149 struct bfd_link_info *info;
4150 {
4151 bfd *dynobj;
4152 struct elf32_hppa_link_hash_table *hplink;
4153 asection *sdyn;
4154
4155 hplink = hppa_link_hash_table (info);
4156 dynobj = hplink->root.dynobj;
4157
4158 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4159
4160 if (hplink->root.dynamic_sections_created)
4161 {
4162 Elf32_External_Dyn *dyncon, *dynconend;
4163
4164 BFD_ASSERT (sdyn != NULL);
4165
4166 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4167 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4168 for (; dyncon < dynconend; dyncon++)
4169 {
4170 Elf_Internal_Dyn dyn;
4171 asection *s;
4172
4173 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4174
4175 switch (dyn.d_tag)
4176 {
4177 default:
4178 break;
4179
4180 case DT_PLTGOT:
4181 /* Use PLTGOT to set the GOT register. */
4182 dyn.d_un.d_ptr = elf_gp (output_bfd);
4183 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4184 break;
4185
4186 case DT_JMPREL:
4187 s = hplink->srelplt;
4188 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4189 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4190 break;
4191
4192 case DT_PLTRELSZ:
4193 s = hplink->srelplt;
4194 if (s->_cooked_size != 0)
4195 dyn.d_un.d_val = s->_cooked_size;
4196 else
4197 dyn.d_un.d_val = s->_raw_size;
4198 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4199 break;
4200 }
4201 }
4202 }
4203
4204 if (hplink->sgot->_raw_size != 0)
4205 {
4206 /* Fill in the first entry in the global offset table.
4207 We use it to point to our dynamic section, if we have one. */
4208 bfd_put_32 (output_bfd,
4209 (sdyn != NULL
4210 ? sdyn->output_section->vma + sdyn->output_offset
4211 : (bfd_vma) 0),
4212 hplink->sgot->contents);
4213
4214 /* The second entry is reserved for use by the dynamic linker. */
4215 memset (hplink->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
4216
4217 /* Set .got entry size. */
4218 elf_section_data (hplink->sgot->output_section)
4219 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
4220 }
4221
4222 if (hplink->splt->_raw_size != 0)
4223 {
4224 /* Set plt entry size. */
4225 elf_section_data (hplink->splt->output_section)
4226 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
4227
4228 if (hplink->need_plt_stub)
4229 {
4230 /* Set up the .plt stub. */
4231 memcpy (hplink->splt->contents
4232 + hplink->splt->_raw_size - sizeof (plt_stub),
4233 plt_stub, sizeof (plt_stub));
4234
4235 if ((hplink->splt->output_offset
4236 + hplink->splt->output_section->vma
4237 + hplink->splt->_raw_size)
4238 != (hplink->sgot->output_offset
4239 + hplink->sgot->output_section->vma))
4240 {
4241 (*_bfd_error_handler)
4242 (_(".got section not immediately after .plt section"));
4243 return false;
4244 }
4245 }
4246 }
4247
4248 return true;
4249 }
4250
4251 /* Tweak the OSABI field of the elf header. */
4252
4253 static void
4254 elf32_hppa_post_process_headers (abfd, link_info)
4255 bfd *abfd;
4256 struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
4257 {
4258 Elf_Internal_Ehdr * i_ehdrp;
4259
4260 i_ehdrp = elf_elfheader (abfd);
4261
4262 if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0)
4263 {
4264 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
4265 }
4266 else
4267 {
4268 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_HPUX;
4269 }
4270 }
4271
4272 /* Called when writing out an object file to decide the type of a
4273 symbol. */
4274 static int
4275 elf32_hppa_elf_get_symbol_type (elf_sym, type)
4276 Elf_Internal_Sym *elf_sym;
4277 int type;
4278 {
4279 if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI)
4280 return STT_PARISC_MILLI;
4281 else
4282 return type;
4283 }
4284
4285 /* Misc BFD support code. */
4286 #define bfd_elf32_bfd_is_local_label_name elf_hppa_is_local_label_name
4287 #define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
4288 #define elf_info_to_howto elf_hppa_info_to_howto
4289 #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel
4290
4291 /* Stuff for the BFD linker. */
4292 #define bfd_elf32_bfd_final_link elf32_hppa_final_link
4293 #define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create
4294 #define elf_backend_add_symbol_hook elf32_hppa_add_symbol_hook
4295 #define elf_backend_adjust_dynamic_symbol elf32_hppa_adjust_dynamic_symbol
4296 #define elf_backend_check_relocs elf32_hppa_check_relocs
4297 #define elf_backend_create_dynamic_sections elf32_hppa_create_dynamic_sections
4298 #define elf_backend_fake_sections elf_hppa_fake_sections
4299 #define elf_backend_relocate_section elf32_hppa_relocate_section
4300 #define elf_backend_hide_symbol elf32_hppa_hide_symbol
4301 #define elf_backend_finish_dynamic_symbol elf32_hppa_finish_dynamic_symbol
4302 #define elf_backend_finish_dynamic_sections elf32_hppa_finish_dynamic_sections
4303 #define elf_backend_size_dynamic_sections elf32_hppa_size_dynamic_sections
4304 #define elf_backend_gc_mark_hook elf32_hppa_gc_mark_hook
4305 #define elf_backend_gc_sweep_hook elf32_hppa_gc_sweep_hook
4306 #define elf_backend_object_p elf32_hppa_object_p
4307 #define elf_backend_final_write_processing elf_hppa_final_write_processing
4308 #define elf_backend_post_process_headers elf32_hppa_post_process_headers
4309 #define elf_backend_get_symbol_type elf32_hppa_elf_get_symbol_type
4310
4311 #define elf_backend_can_gc_sections 1
4312 #define elf_backend_plt_alignment 2
4313 #define elf_backend_want_got_plt 0
4314 #define elf_backend_plt_readonly 0
4315 #define elf_backend_want_plt_sym 0
4316 #define elf_backend_got_header_size 8
4317
4318 #define TARGET_BIG_SYM bfd_elf32_hppa_vec
4319 #define TARGET_BIG_NAME "elf32-hppa"
4320 #define ELF_ARCH bfd_arch_hppa
4321 #define ELF_MACHINE_CODE EM_PARISC
4322 #define ELF_MAXPAGESIZE 0x1000
4323
4324 #include "elf32-target.h"
4325
4326 #undef TARGET_BIG_SYM
4327 #define TARGET_BIG_SYM bfd_elf32_hppa_linux_vec
4328 #undef TARGET_BIG_NAME
4329 #define TARGET_BIG_NAME "elf32-hppa-linux"
4330
4331 #define INCLUDED_TARGET_FILE 1
4332 #include "elf32-target.h"
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