1 /* BFD back-end for HP PA-RISC ELF files.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2001
3 Free Software Foundation, Inc.
6 Center for Software Science
7 Department of Computer Science
9 Largely rewritten by Alan Modra <alan@linuxcare.com.au>
11 This file is part of BFD, the Binary File Descriptor library.
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
33 #include "elf32-hppa.h"
36 #include "elf32-hppa.h"
38 /* In order to gain some understanding of code in this file without
39 knowing all the intricate details of the linker, note the
42 Functions named elf32_hppa_* are called by external routines, other
43 functions are only called locally. elf32_hppa_* functions appear
44 in this file more or less in the order in which they are called
45 from external routines. eg. elf32_hppa_check_relocs is called
46 early in the link process, elf32_hppa_finish_dynamic_sections is
47 one of the last functions. */
49 /* We use two hash tables to hold information for linking PA ELF objects.
51 The first is the elf32_hppa_link_hash_table which is derived
52 from the standard ELF linker hash table. We use this as a place to
53 attach other hash tables and static information.
55 The second is the stub hash table which is derived from the
56 base BFD hash table. The stub hash table holds the information
57 necessary to build the linker stubs during a link.
59 There are a number of different stubs generated by the linker.
67 : addil LR'X - ($PIC_pcrel$0 - 4),%r1
68 : be,n RR'X - ($PIC_pcrel$0 - 8)(%sr4,%r1)
70 Import stub to call shared library routine from normal object file
71 (single sub-space version)
72 : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point
73 : ldw RR'lt_ptr+ltoff(%r1),%r21
75 : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value.
77 Import stub to call shared library routine from shared library
78 (single sub-space version)
79 : addil LR'ltoff,%r19 ; get procedure entry point
80 : ldw RR'ltoff(%r1),%r21
82 : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value.
84 Import stub to call shared library routine from normal object file
85 (multiple sub-space support)
86 : addil LR'lt_ptr+ltoff,%dp ; get procedure entry point
87 : ldw RR'lt_ptr+ltoff(%r1),%r21
88 : ldw RR'lt_ptr+ltoff+4(%r1),%r19 ; get new dlt value.
91 : be 0(%sr0,%r21) ; branch to target
92 : stw %rp,-24(%sp) ; save rp
94 Import stub to call shared library routine from shared library
95 (multiple sub-space support)
96 : addil LR'ltoff,%r19 ; get procedure entry point
97 : ldw RR'ltoff(%r1),%r21
98 : ldw RR'ltoff+4(%r1),%r19 ; get new dlt value.
101 : be 0(%sr0,%r21) ; branch to target
102 : stw %rp,-24(%sp) ; save rp
104 Export stub to return from shared lib routine (multiple sub-space support)
105 One of these is created for each exported procedure in a shared
106 library (and stored in the shared lib). Shared lib routines are
107 called via the first instruction in the export stub so that we can
108 do an inter-space return. Not required for single sub-space.
109 : bl,n X,%rp ; trap the return
111 : ldw -24(%sp),%rp ; restore the original rp
114 : be,n 0(%sr0,%rp) ; inter-space return */
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"
121 static const bfd_byte plt_stub[] =
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 */
133 /* Section name for stubs is the associated section name plus this
135 #define STUB_SUFFIX ".stub"
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
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
151 /* We don't need to copy any PC- or GP-relative dynamic relocs into a
152 shared object's dynamic section. All the relocs of the limited
153 class we are interested in, are absolute. See check_relocs. */
154 #ifndef IS_ABSOLUTE_RELOC
155 #define IS_ABSOLUTE_RELOC(r_type) 1
158 enum elf32_hppa_stub_type {
159 hppa_stub_long_branch,
160 hppa_stub_long_branch_shared,
162 hppa_stub_import_shared,
167 struct elf32_hppa_stub_hash_entry {
169 /* Base hash table entry structure. */
170 struct bfd_hash_entry root;
172 /* The stub section. */
175 #if ! LONG_BRANCH_PIC_IN_SHLIB
176 /* It's associated reloc section. */
180 /* Offset within stub_sec of the beginning of this stub. */
183 /* Given the symbol's value and its section we can determine its final
184 value when building the stubs (so the stub knows where to jump. */
185 bfd_vma target_value;
186 asection *target_section;
188 enum elf32_hppa_stub_type stub_type;
190 /* The symbol table entry, if any, that this was derived from. */
191 struct elf32_hppa_link_hash_entry *h;
193 /* Where this stub is being called from, or, in the case of combined
194 stub sections, the first input section in the group. */
198 struct elf32_hppa_link_hash_entry {
200 struct elf_link_hash_entry elf;
202 /* A pointer to the most recently used stub hash entry against this
204 struct elf32_hppa_stub_hash_entry *stub_cache;
206 #if ! LONG_BRANCH_PIC_IN_SHLIB
207 /* Used to track whether we have allocated space for a long branch
208 stub relocation for this symbol in the given section. */
209 asection *stub_reloc_sec;
212 /* Used to count relocations for delayed sizing of relocation
214 struct elf32_hppa_dyn_reloc_entry {
216 /* Next relocation in the chain. */
217 struct elf32_hppa_dyn_reloc_entry *next;
219 /* The section in dynobj. */
222 /* Number of relocs copied in this section. */
226 /* Set during a static link if we detect a function is PIC. */
227 unsigned int maybe_pic_call:1;
229 /* Set if the only reason we need a .plt entry is for a non-PIC to
230 PIC function call. */
231 unsigned int pic_call:1;
233 /* Set if this symbol is used by a plabel reloc. */
234 unsigned int plabel:1;
236 /* Set if this symbol is an init or fini function and thus should
237 use an absolute reloc. */
238 unsigned int plt_abs:1;
241 struct elf32_hppa_link_hash_table {
243 /* The main hash table. */
244 struct elf_link_hash_table root;
246 /* The stub hash table. */
247 struct bfd_hash_table stub_hash_table;
249 /* Linker stub bfd. */
252 /* Linker call-backs. */
253 asection * (*add_stub_section) PARAMS ((const char *, asection *));
254 void (*layout_sections_again) PARAMS ((void));
256 /* Array to keep track of which stub sections have been created, and
257 information on stub grouping. */
259 /* This is the section to which stubs in the group will be
262 /* The stub section. */
264 #if ! LONG_BRANCH_PIC_IN_SHLIB
265 /* The stub section's reloc section. */
270 /* Short-cuts to get to dynamic linker sections. */
278 /* Used during a final link to store the base of the text and data
279 segments so that we can perform SEGREL relocations. */
280 bfd_vma text_segment_base;
281 bfd_vma data_segment_base;
283 /* Whether we support multiple sub-spaces for shared libs. */
284 unsigned int multi_subspace:1;
286 /* Flags set when PCREL12F and PCREL17F branches detected. Used to
287 select suitable defaults for the stub group size. */
288 unsigned int has_12bit_branch:1;
289 unsigned int has_17bit_branch:1;
291 /* Set if we need a .plt stub to support lazy dynamic linking. */
292 unsigned int need_plt_stub:1;
295 /* Various hash macros and functions. */
296 #define hppa_link_hash_table(p) \
297 ((struct elf32_hppa_link_hash_table *) ((p)->hash))
299 #define hppa_stub_hash_lookup(table, string, create, copy) \
300 ((struct elf32_hppa_stub_hash_entry *) \
301 bfd_hash_lookup ((table), (string), (create), (copy)))
303 static struct bfd_hash_entry *stub_hash_newfunc
304 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
306 static struct bfd_hash_entry *hppa_link_hash_newfunc
307 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
309 static struct bfd_link_hash_table *elf32_hppa_link_hash_table_create
312 /* Stub handling functions. */
313 static char *hppa_stub_name
314 PARAMS ((const asection *, const asection *,
315 const struct elf32_hppa_link_hash_entry *,
316 const Elf_Internal_Rela *));
318 static struct elf32_hppa_stub_hash_entry *hppa_get_stub_entry
319 PARAMS ((const asection *, const asection *,
320 struct elf32_hppa_link_hash_entry *,
321 const Elf_Internal_Rela *,
322 struct elf32_hppa_link_hash_table *));
324 static struct elf32_hppa_stub_hash_entry *hppa_add_stub
325 PARAMS ((const char *, asection *, struct elf32_hppa_link_hash_table *));
327 static enum elf32_hppa_stub_type hppa_type_of_stub
328 PARAMS ((asection *, const Elf_Internal_Rela *,
329 struct elf32_hppa_link_hash_entry *, bfd_vma));
331 static boolean hppa_build_one_stub
332 PARAMS ((struct bfd_hash_entry *, PTR));
334 static boolean hppa_size_one_stub
335 PARAMS ((struct bfd_hash_entry *, PTR));
337 /* BFD and elf backend functions. */
338 static boolean elf32_hppa_object_p PARAMS ((bfd *));
340 static boolean elf32_hppa_add_symbol_hook
341 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
342 const char **, flagword *, asection **, bfd_vma *));
344 static boolean elf32_hppa_create_dynamic_sections
345 PARAMS ((bfd *, struct bfd_link_info *));
347 static boolean elf32_hppa_check_relocs
348 PARAMS ((bfd *, struct bfd_link_info *,
349 asection *, const Elf_Internal_Rela *));
351 static asection *elf32_hppa_gc_mark_hook
352 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
353 struct elf_link_hash_entry *, Elf_Internal_Sym *));
355 static boolean elf32_hppa_gc_sweep_hook
356 PARAMS ((bfd *, struct bfd_link_info *,
357 asection *, const Elf_Internal_Rela *));
359 static void elf32_hppa_hide_symbol
360 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
362 static boolean elf32_hppa_adjust_dynamic_symbol
363 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
365 static boolean hppa_handle_PIC_calls
366 PARAMS ((struct elf_link_hash_entry *, PTR));
368 static boolean allocate_plt_and_got_and_discard_relocs
369 PARAMS ((struct elf_link_hash_entry *, PTR));
371 static boolean clobber_millicode_symbols
372 PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *));
374 static boolean elf32_hppa_size_dynamic_sections
375 PARAMS ((bfd *, struct bfd_link_info *));
377 static boolean elf32_hppa_final_link
378 PARAMS ((bfd *, struct bfd_link_info *));
380 static void hppa_record_segment_addr
381 PARAMS ((bfd *, asection *, PTR));
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 *));
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 **));
392 static int hppa_unwind_entry_compare
393 PARAMS ((const PTR, const PTR));
395 static boolean elf32_hppa_finish_dynamic_symbol
396 PARAMS ((bfd *, struct bfd_link_info *,
397 struct elf_link_hash_entry *, Elf_Internal_Sym *));
399 static boolean elf32_hppa_finish_dynamic_sections
400 PARAMS ((bfd *, struct bfd_link_info *));
402 static void elf32_hppa_post_process_headers
403 PARAMS ((bfd *, struct bfd_link_info *));
405 static int elf32_hppa_elf_get_symbol_type
406 PARAMS ((Elf_Internal_Sym *, int));
408 /* Assorted hash table functions. */
410 /* Initialize an entry in the stub hash table. */
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;
418 struct elf32_hppa_stub_hash_entry *ret;
420 ret = (struct elf32_hppa_stub_hash_entry *) entry;
422 /* Allocate the structure if it has not already been allocated by a
426 ret = ((struct elf32_hppa_stub_hash_entry *)
427 bfd_hash_allocate (table,
428 sizeof (struct elf32_hppa_stub_hash_entry)));
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));
439 /* Initialize the local fields. */
440 ret->stub_sec = NULL;
441 #if ! LONG_BRANCH_PIC_IN_SHLIB
442 ret->reloc_sec = NULL;
444 ret->stub_offset = 0;
445 ret->target_value = 0;
446 ret->target_section = NULL;
447 ret->stub_type = hppa_stub_long_branch;
452 return (struct bfd_hash_entry *) ret;
455 /* Initialize an entry in the link hash table. */
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;
463 struct elf32_hppa_link_hash_entry *ret;
465 ret = (struct elf32_hppa_link_hash_entry *) entry;
467 /* Allocate the structure if it has not already been allocated by a
471 ret = ((struct elf32_hppa_link_hash_entry *)
472 bfd_hash_allocate (table,
473 sizeof (struct elf32_hppa_link_hash_entry)));
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,
485 /* Initialize the local fields. */
486 #if ! LONG_BRANCH_PIC_IN_SHLIB
487 ret->stub_reloc_sec = NULL;
489 ret->stub_cache = NULL;
490 ret->reloc_entries = NULL;
491 ret->maybe_pic_call = 0;
497 return (struct bfd_hash_entry *) ret;
500 /* Create the derived linker hash table. The PA ELF port uses the derived
501 hash table to keep information specific to the PA ELF linker (without
502 using static variables). */
504 static struct bfd_link_hash_table *
505 elf32_hppa_link_hash_table_create (abfd)
508 struct elf32_hppa_link_hash_table *ret;
509 bfd_size_type amt = sizeof (*ret);
511 ret = (struct elf32_hppa_link_hash_table *) bfd_alloc (abfd, amt);
515 if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, hppa_link_hash_newfunc))
517 bfd_release (abfd, ret);
521 /* Init the stub hash table too. */
522 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc))
525 ret->stub_bfd = NULL;
526 ret->add_stub_section = NULL;
527 ret->layout_sections_again = NULL;
528 ret->stub_group = 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;
542 return &ret->root.root;
545 /* Build a name for an entry in the stub hash table. */
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;
559 len = 8 + 1 + strlen (hash->elf.root.root.string) + 1 + 8 + 1;
560 stub_name = bfd_malloc (len);
561 if (stub_name != NULL)
563 sprintf (stub_name, "%08x_%s+%x",
564 input_section->id & 0xffffffff,
565 hash->elf.root.root.string,
566 (int) rel->r_addend & 0xffffffff);
571 len = 8 + 1 + 8 + 1 + 8 + 1 + 8 + 1;
572 stub_name = bfd_malloc (len);
573 if (stub_name != NULL)
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);
585 /* Look up an entry in the stub hash. Stub entries are cached because
586 creating the stub name takes a bit of time. */
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;
596 struct elf32_hppa_stub_hash_entry *stub_entry;
597 const asection *id_sec;
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;
606 if (hash != NULL && hash->stub_cache != NULL
607 && hash->stub_cache->h == hash
608 && hash->stub_cache->id_sec == id_sec)
610 stub_entry = hash->stub_cache;
616 stub_name = hppa_stub_name (id_sec, sym_sec, hash, rel);
617 if (stub_name == NULL)
620 stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table,
621 stub_name, false, false);
622 if (stub_entry == NULL)
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),
628 (long) rel->r_offset,
634 hash->stub_cache = stub_entry;
643 /* Add a new stub entry to the stub hash. Not all fields of the new
644 stub entry are initialised. */
646 static struct elf32_hppa_stub_hash_entry *
647 hppa_add_stub (stub_name, section, hplink)
648 const char *stub_name;
650 struct elf32_hppa_link_hash_table *hplink;
654 struct elf32_hppa_stub_hash_entry *stub_entry;
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)
660 stub_sec = hplink->stub_group[link_sec->id].stub_sec;
661 if (stub_sec == NULL)
666 len = strlen (link_sec->name) + sizeof (STUB_SUFFIX);
667 s_name = bfd_alloc (hplink->stub_bfd, len);
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)
676 hplink->stub_group[link_sec->id].stub_sec = stub_sec;
678 hplink->stub_group[section->id].stub_sec = stub_sec;
681 /* Enter this entry into the linker stub hash table. */
682 stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table, stub_name,
684 if (stub_entry == NULL)
686 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
687 bfd_get_filename (section->owner),
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;
696 stub_entry->stub_offset = 0;
697 stub_entry->id_sec = link_sec;
701 /* Determine the type of stub needed, if any, for a call. */
703 static enum elf32_hppa_stub_type
704 hppa_type_of_stub (input_sec, rel, hash, destination)
706 const Elf_Internal_Rela *rel;
707 struct elf32_hppa_link_hash_entry *hash;
711 bfd_vma branch_offset;
712 bfd_vma max_branch_offset;
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->maybe_pic_call && !(input_sec->flags & SEC_HAS_GOT_REF))))
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;
734 /* Determine where the call point is. */
735 location = (input_sec->output_offset
736 + input_sec->output_section->vma
739 branch_offset = destination - location - 8;
740 r_type = ELF32_R_TYPE (rel->r_info);
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)
748 max_branch_offset = (1 << (17-1)) << 2;
750 else if (r_type == (unsigned int) R_PARISC_PCREL12F)
752 max_branch_offset = (1 << (12-1)) << 2;
754 else /* R_PARISC_PCREL22F. */
756 max_branch_offset = (1 << (22-1)) << 2;
759 if (branch_offset + max_branch_offset >= 2*max_branch_offset)
761 #if LONG_BRANCH_VIA_PLT
763 && hash->elf.dynindx != -1
764 && hash->elf.plt.offset != (bfd_vma) -1
765 && hash->elf.type != STT_PARISC_MILLI)
767 /* If we are doing a shared link and find we need a long
768 branch stub, then go via the .plt if possible. */
769 return hppa_stub_import;
773 return hppa_stub_long_branch;
775 return hppa_stub_none;
778 /* Build one linker stub as defined by the stub hash table entry GEN_ENTRY.
779 IN_ARG contains the link info pointer. */
781 #define LDIL_R1 0x20200000 /* ldil LR'XXX,%r1 */
782 #define BE_SR4_R1 0xe0202002 /* be,n RR'XXX(%sr4,%r1) */
784 #define BL_R1 0xe8200000 /* b,l .+8,%r1 */
785 #define ADDIL_R1 0x28200000 /* addil LR'XXX,%r1,%r1 */
786 #define DEPI_R1 0xd4201c1e /* depi 0,31,2,%r1 */
788 #define ADDIL_DP 0x2b600000 /* addil LR'XXX,%dp,%r1 */
789 #define LDW_R1_R21 0x48350000 /* ldw RR'XXX(%sr0,%r1),%r21 */
790 #define BV_R0_R21 0xeaa0c000 /* bv %r0(%r21) */
791 #define LDW_R1_R19 0x48330000 /* ldw RR'XXX(%sr0,%r1),%r19 */
793 #define ADDIL_R19 0x2a600000 /* addil LR'XXX,%r19,%r1 */
794 #define LDW_R1_DP 0x483b0000 /* ldw RR'XXX(%sr0,%r1),%dp */
796 #define LDSID_R21_R1 0x02a010a1 /* ldsid (%sr0,%r21),%r1 */
797 #define MTSP_R1 0x00011820 /* mtsp %r1,%sr0 */
798 #define BE_SR0_R21 0xe2a00000 /* be 0(%sr0,%r21) */
799 #define STW_RP 0x6bc23fd1 /* stw %rp,-24(%sr0,%sp) */
801 #define BL_RP 0xe8400002 /* b,l,n XXX,%rp */
802 #define NOP 0x08000240 /* nop */
803 #define LDW_RP 0x4bc23fd1 /* ldw -24(%sr0,%sp),%rp */
804 #define LDSID_RP_R1 0x004010a1 /* ldsid (%sr0,%rp),%r1 */
805 #define BE_SR0_RP 0xe0400002 /* be,n 0(%sr0,%rp) */
812 #define LDW_R1_DLT LDW_R1_R19
814 #define LDW_R1_DLT LDW_R1_DP
818 hppa_build_one_stub (gen_entry, in_arg)
819 struct bfd_hash_entry *gen_entry;
822 struct elf32_hppa_stub_hash_entry *stub_entry;
823 struct bfd_link_info *info;
824 struct elf32_hppa_link_hash_table *hplink;
834 /* Massage our args to the form they really have. */
835 stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
836 info = (struct bfd_link_info *) in_arg;
838 hplink = hppa_link_hash_table (info);
839 stub_sec = stub_entry->stub_sec;
841 /* Make a note of the offset within the stubs for this entry. */
842 stub_entry->stub_offset = stub_sec->_raw_size;
843 loc = stub_sec->contents + stub_entry->stub_offset;
845 stub_bfd = stub_sec->owner;
847 switch (stub_entry->stub_type)
849 case hppa_stub_long_branch:
850 /* Create the long branch. A long branch is formed with "ldil"
851 loading the upper bits of the target address into a register,
852 then branching with "be" which adds in the lower bits.
853 The "be" has its delay slot nullified. */
854 sym_value = (stub_entry->target_value
855 + stub_entry->target_section->output_offset
856 + stub_entry->target_section->output_section->vma);
858 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel);
859 insn = hppa_rebuild_insn ((int) LDIL_R1, val, 21);
860 bfd_put_32 (stub_bfd, insn, loc);
862 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel) >> 2;
863 insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
864 bfd_put_32 (stub_bfd, insn, loc + 4);
866 #if ! LONG_BRANCH_PIC_IN_SHLIB
869 /* Output a dynamic relocation for this stub. We only
870 output one PCREL21L reloc per stub, trusting that the
871 dynamic linker will also fix the implied PCREL17R for the
872 second instruction. PCREL21L dynamic relocs had better
873 never be emitted for some other purpose... */
875 Elf_Internal_Rela outrel;
877 if (stub_entry->h == NULL)
879 (*_bfd_error_handler)
880 (_("%s(%s+0x%lx): cannot relocate %s, recompile with -ffunction-sections"),
881 bfd_get_filename (stub_entry->target_section->owner),
883 (long) stub_entry->stub_offset,
884 stub_entry->root.string);
885 bfd_set_error (bfd_error_bad_value);
889 srel = stub_entry->reloc_sec;
892 (*_bfd_error_handler)
893 (_("Could not find relocation section for %s"),
895 bfd_set_error (bfd_error_bad_value);
899 outrel.r_offset = (stub_entry->stub_offset
900 + stub_sec->output_offset
901 + stub_sec->output_section->vma);
902 outrel.r_info = ELF32_R_INFO (0, R_PARISC_PCREL21L);
903 outrel.r_addend = sym_value;
904 bfd_elf32_swap_reloca_out (stub_sec->output_section->owner,
906 ((Elf32_External_Rela *)
907 srel->contents + srel->reloc_count));
914 case hppa_stub_long_branch_shared:
915 /* Branches are relative. This is where we are going to. */
916 sym_value = (stub_entry->target_value
917 + stub_entry->target_section->output_offset
918 + stub_entry->target_section->output_section->vma);
920 /* And this is where we are coming from, more or less. */
921 sym_value -= (stub_entry->stub_offset
922 + stub_sec->output_offset
923 + stub_sec->output_section->vma);
925 bfd_put_32 (stub_bfd, (bfd_vma) BL_R1, loc);
926 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_lrsel);
927 insn = hppa_rebuild_insn ((int) ADDIL_R1, val, 21);
928 bfd_put_32 (stub_bfd, insn, loc + 4);
930 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_rrsel) >> 2;
931 insn = hppa_rebuild_insn ((int) BE_SR4_R1, val, 17);
932 bfd_put_32 (stub_bfd, insn, loc + 8);
936 case hppa_stub_import:
937 case hppa_stub_import_shared:
938 off = stub_entry->h->elf.plt.offset;
939 if (off >= (bfd_vma) -2)
942 off &= ~ (bfd_vma) 1;
944 + hplink->splt->output_offset
945 + hplink->splt->output_section->vma
946 - elf_gp (hplink->splt->output_section->owner));
950 if (stub_entry->stub_type == hppa_stub_import_shared)
953 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_lrsel),
954 insn = hppa_rebuild_insn ((int) insn, val, 21);
955 bfd_put_32 (stub_bfd, insn, loc);
957 /* It is critical to use lrsel/rrsel here because we are using
958 two different offsets (+0 and +4) from sym_value. If we use
959 lsel/rsel then with unfortunate sym_values we will round
960 sym_value+4 up to the next 2k block leading to a mis-match
961 between the lsel and rsel value. */
962 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 0, e_rrsel);
963 insn = hppa_rebuild_insn ((int) LDW_R1_R21, val, 14);
964 bfd_put_32 (stub_bfd, insn, loc + 4);
966 if (hplink->multi_subspace)
968 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
969 insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
970 bfd_put_32 (stub_bfd, insn, loc + 8);
972 bfd_put_32 (stub_bfd, (bfd_vma) LDSID_R21_R1, loc + 12);
973 bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
974 bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_R21, loc + 20);
975 bfd_put_32 (stub_bfd, (bfd_vma) STW_RP, loc + 24);
981 bfd_put_32 (stub_bfd, (bfd_vma) BV_R0_R21, loc + 8);
982 val = hppa_field_adjust (sym_value, (bfd_signed_vma) 4, e_rrsel);
983 insn = hppa_rebuild_insn ((int) LDW_R1_DLT, val, 14);
984 bfd_put_32 (stub_bfd, insn, loc + 12);
990 && stub_entry->h != NULL
991 && stub_entry->h->pic_call)
993 /* Build the .plt entry needed to call a PIC function from
994 statically linked code. We don't need any relocs. */
996 struct elf32_hppa_link_hash_entry *eh;
999 dynobj = hplink->root.dynobj;
1000 eh = (struct elf32_hppa_link_hash_entry *) stub_entry->h;
1002 if (eh->elf.root.type != bfd_link_hash_defined
1003 && eh->elf.root.type != bfd_link_hash_defweak)
1006 value = (eh->elf.root.u.def.value
1007 + eh->elf.root.u.def.section->output_offset
1008 + eh->elf.root.u.def.section->output_section->vma);
1010 /* Fill in the entry in the procedure linkage table.
1012 The format of a plt entry is
1016 bfd_put_32 (hplink->splt->owner, value,
1017 hplink->splt->contents + off);
1018 value = elf_gp (hplink->splt->output_section->owner);
1019 bfd_put_32 (hplink->splt->owner, value,
1020 hplink->splt->contents + off + 4);
1024 case hppa_stub_export:
1025 /* Branches are relative. This is where we are going to. */
1026 sym_value = (stub_entry->target_value
1027 + stub_entry->target_section->output_offset
1028 + stub_entry->target_section->output_section->vma);
1030 /* And this is where we are coming from. */
1031 sym_value -= (stub_entry->stub_offset
1032 + stub_sec->output_offset
1033 + stub_sec->output_section->vma);
1035 if (sym_value - 8 + 0x40000 >= 0x80000)
1037 (*_bfd_error_handler)
1038 (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
1039 bfd_get_filename (stub_entry->target_section->owner),
1041 (long) stub_entry->stub_offset,
1042 stub_entry->root.string);
1043 bfd_set_error (bfd_error_bad_value);
1047 val = hppa_field_adjust (sym_value, (bfd_signed_vma) -8, e_fsel) >> 2;
1048 insn = hppa_rebuild_insn ((int) BL_RP, val, 17);
1049 bfd_put_32 (stub_bfd, insn, loc);
1051 bfd_put_32 (stub_bfd, (bfd_vma) NOP, loc + 4);
1052 bfd_put_32 (stub_bfd, (bfd_vma) LDW_RP, loc + 8);
1053 bfd_put_32 (stub_bfd, (bfd_vma) LDSID_RP_R1, loc + 12);
1054 bfd_put_32 (stub_bfd, (bfd_vma) MTSP_R1, loc + 16);
1055 bfd_put_32 (stub_bfd, (bfd_vma) BE_SR0_RP, loc + 20);
1057 /* Point the function symbol at the stub. */
1058 stub_entry->h->elf.root.u.def.section = stub_sec;
1059 stub_entry->h->elf.root.u.def.value = stub_sec->_raw_size;
1069 stub_sec->_raw_size += size;
1095 /* As above, but don't actually build the stub. Just bump offset so
1096 we know stub section sizes. */
1099 hppa_size_one_stub (gen_entry, in_arg)
1100 struct bfd_hash_entry *gen_entry;
1103 struct elf32_hppa_stub_hash_entry *stub_entry;
1104 struct elf32_hppa_link_hash_table *hplink;
1107 /* Massage our args to the form they really have. */
1108 stub_entry = (struct elf32_hppa_stub_hash_entry *) gen_entry;
1109 hplink = (struct elf32_hppa_link_hash_table *) in_arg;
1111 if (stub_entry->stub_type == hppa_stub_long_branch)
1113 #if ! LONG_BRANCH_PIC_IN_SHLIB
1114 if (stub_entry->reloc_sec != NULL)
1115 stub_entry->reloc_sec->_raw_size += sizeof (Elf32_External_Rela);
1119 else if (stub_entry->stub_type == hppa_stub_long_branch_shared)
1121 else if (stub_entry->stub_type == hppa_stub_export)
1123 else /* hppa_stub_import or hppa_stub_import_shared. */
1125 if (hplink->multi_subspace)
1131 stub_entry->stub_sec->_raw_size += size;
1135 /* Return nonzero if ABFD represents an HPPA ELF32 file.
1136 Additionally we set the default architecture and machine. */
1139 elf32_hppa_object_p (abfd)
1142 Elf_Internal_Ehdr * i_ehdrp;
1145 i_ehdrp = elf_elfheader (abfd);
1146 if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0)
1148 if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_LINUX)
1153 if (i_ehdrp->e_ident[EI_OSABI] != ELFOSABI_HPUX)
1157 flags = i_ehdrp->e_flags;
1158 switch (flags & (EF_PARISC_ARCH | EF_PARISC_WIDE))
1160 case EFA_PARISC_1_0:
1161 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 10);
1162 case EFA_PARISC_1_1:
1163 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 11);
1164 case EFA_PARISC_2_0:
1165 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 20);
1166 case EFA_PARISC_2_0 | EF_PARISC_WIDE:
1167 return bfd_default_set_arch_mach (abfd, bfd_arch_hppa, 25);
1172 /* Undo the generic ELF code's subtraction of section->vma from the
1173 value of each external symbol. */
1176 elf32_hppa_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
1177 bfd *abfd ATTRIBUTE_UNUSED;
1178 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1179 const Elf_Internal_Sym *sym ATTRIBUTE_UNUSED;
1180 const char **namep ATTRIBUTE_UNUSED;
1181 flagword *flagsp ATTRIBUTE_UNUSED;
1185 *valp += (*secp)->vma;
1189 /* Create the .plt and .got sections, and set up our hash table
1190 short-cuts to various dynamic sections. */
1193 elf32_hppa_create_dynamic_sections (abfd, info)
1195 struct bfd_link_info *info;
1197 struct elf32_hppa_link_hash_table *hplink;
1199 /* Don't try to create the .plt and .got twice. */
1200 hplink = hppa_link_hash_table (info);
1201 if (hplink->splt != NULL)
1204 /* Call the generic code to do most of the work. */
1205 if (! _bfd_elf_create_dynamic_sections (abfd, info))
1208 hplink->splt = bfd_get_section_by_name (abfd, ".plt");
1209 hplink->srelplt = bfd_get_section_by_name (abfd, ".rela.plt");
1211 hplink->sgot = bfd_get_section_by_name (abfd, ".got");
1212 hplink->srelgot = bfd_make_section (abfd, ".rela.got");
1213 if (hplink->srelgot == NULL
1214 || ! bfd_set_section_flags (abfd, hplink->srelgot,
1219 | SEC_LINKER_CREATED
1221 || ! bfd_set_section_alignment (abfd, hplink->srelgot, 2))
1224 hplink->sdynbss = bfd_get_section_by_name (abfd, ".dynbss");
1225 hplink->srelbss = bfd_get_section_by_name (abfd, ".rela.bss");
1230 /* Look through the relocs for a section during the first phase, and
1231 allocate space in the global offset table or procedure linkage
1232 table. At this point we haven't necessarily read all the input
1236 elf32_hppa_check_relocs (abfd, info, sec, relocs)
1238 struct bfd_link_info *info;
1240 const Elf_Internal_Rela *relocs;
1243 Elf_Internal_Shdr *symtab_hdr;
1244 struct elf_link_hash_entry **sym_hashes;
1245 bfd_signed_vma *local_got_refcounts;
1246 const Elf_Internal_Rela *rel;
1247 const Elf_Internal_Rela *rel_end;
1248 struct elf32_hppa_link_hash_table *hplink;
1250 asection *stubreloc;
1252 if (info->relocateable)
1255 hplink = hppa_link_hash_table (info);
1256 dynobj = hplink->root.dynobj;
1257 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1258 sym_hashes = elf_sym_hashes (abfd);
1259 local_got_refcounts = elf_local_got_refcounts (abfd);
1263 rel_end = relocs + sec->reloc_count;
1264 for (rel = relocs; rel < rel_end; rel++)
1270 #if LONG_BRANCH_PIC_IN_SHLIB
1271 NEED_STUBREL = 0, /* We won't be needing them in this case. */
1278 unsigned int r_symndx, r_type;
1279 struct elf32_hppa_link_hash_entry *h;
1282 r_symndx = ELF32_R_SYM (rel->r_info);
1284 if (r_symndx < symtab_hdr->sh_info)
1287 h = ((struct elf32_hppa_link_hash_entry *)
1288 sym_hashes[r_symndx - symtab_hdr->sh_info]);
1290 r_type = ELF32_R_TYPE (rel->r_info);
1294 case R_PARISC_DLTIND14F:
1295 case R_PARISC_DLTIND14R:
1296 case R_PARISC_DLTIND21L:
1297 /* This symbol requires a global offset table entry. */
1298 need_entry = NEED_GOT;
1300 /* Mark this section as containing PIC code. */
1301 sec->flags |= SEC_HAS_GOT_REF;
1304 case R_PARISC_PLABEL14R: /* "Official" procedure labels. */
1305 case R_PARISC_PLABEL21L:
1306 case R_PARISC_PLABEL32:
1307 /* If the addend is non-zero, we break badly. */
1308 if (rel->r_addend != 0)
1311 /* If we are creating a shared library, then we need to
1312 create a PLT entry for all PLABELs, because PLABELs with
1313 local symbols may be passed via a pointer to another
1314 object. Additionally, output a dynamic relocation
1315 pointing to the PLT entry.
1316 For executables, the original 32-bit ABI allowed two
1317 different styles of PLABELs (function pointers): For
1318 global functions, the PLABEL word points into the .plt
1319 two bytes past a (function address, gp) pair, and for
1320 local functions the PLABEL points directly at the
1321 function. The magic +2 for the first type allows us to
1322 differentiate between the two. As you can imagine, this
1323 is a real pain when it comes to generating code to call
1324 functions indirectly or to compare function pointers.
1325 We avoid the mess by always pointing a PLABEL into the
1326 .plt, even for local functions. */
1327 need_entry = PLT_PLABEL | NEED_PLT | NEED_DYNREL;
1330 case R_PARISC_PCREL12F:
1331 hplink->has_12bit_branch = 1;
1333 case R_PARISC_PCREL17C:
1334 case R_PARISC_PCREL17F:
1335 hplink->has_17bit_branch = 1;
1337 case R_PARISC_PCREL22F:
1338 /* Function calls might need to go through the .plt, and
1339 might require long branch stubs. */
1342 /* We know local syms won't need a .plt entry, and if
1343 they need a long branch stub we can't guarantee that
1344 we can reach the stub. So just flag an error later
1345 if we're doing a shared link and find we need a long
1351 /* Global symbols will need a .plt entry if they remain
1352 global, and in most cases won't need a long branch
1353 stub. Unfortunately, we have to cater for the case
1354 where a symbol is forced local by versioning, or due
1355 to symbolic linking, and we lose the .plt entry. */
1356 need_entry = NEED_PLT | NEED_STUBREL;
1357 if (h->elf.type == STT_PARISC_MILLI)
1358 need_entry = NEED_STUBREL;
1362 case R_PARISC_SEGBASE: /* Used to set segment base. */
1363 case R_PARISC_SEGREL32: /* Relative reloc, used for unwind. */
1364 case R_PARISC_PCREL14F: /* PC relative load/store. */
1365 case R_PARISC_PCREL14R:
1366 case R_PARISC_PCREL17R: /* External branches. */
1367 case R_PARISC_PCREL21L: /* As above, and for load/store too. */
1368 /* We don't need to propagate the relocation if linking a
1369 shared object since these are section relative. */
1372 case R_PARISC_DPREL14F: /* Used for gp rel data load/store. */
1373 case R_PARISC_DPREL14R:
1374 case R_PARISC_DPREL21L:
1377 (*_bfd_error_handler)
1378 (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
1379 bfd_get_filename (abfd),
1380 elf_hppa_howto_table[r_type].name);
1381 bfd_set_error (bfd_error_bad_value);
1386 case R_PARISC_DIR17F: /* Used for external branches. */
1387 case R_PARISC_DIR17R:
1388 case R_PARISC_DIR14F: /* Used for load/store from absolute locn. */
1389 case R_PARISC_DIR14R:
1390 case R_PARISC_DIR21L: /* As above, and for ext branches too. */
1392 /* Help debug shared library creation. Any of the above
1393 relocs can be used in shared libs, but they may cause
1394 pages to become unshared. */
1397 (*_bfd_error_handler)
1398 (_("%s: relocation %s should not be used when making a shared object; recompile with -fPIC"),
1399 bfd_get_filename (abfd),
1400 elf_hppa_howto_table[r_type].name);
1405 case R_PARISC_DIR32: /* .word relocs. */
1406 /* We may want to output a dynamic relocation later. */
1407 need_entry = NEED_DYNREL;
1410 /* This relocation describes the C++ object vtable hierarchy.
1411 Reconstruct it for later use during GC. */
1412 case R_PARISC_GNU_VTINHERIT:
1413 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec,
1414 &h->elf, rel->r_offset))
1418 /* This relocation describes which C++ vtable entries are actually
1419 used. Record for later use during GC. */
1420 case R_PARISC_GNU_VTENTRY:
1421 if (!_bfd_elf32_gc_record_vtentry (abfd, sec,
1422 &h->elf, rel->r_addend))
1430 /* Now carry out our orders. */
1431 if (need_entry & NEED_GOT)
1433 /* Allocate space for a GOT entry, as well as a dynamic
1434 relocation for this entry. */
1436 hplink->root.dynobj = dynobj = abfd;
1438 if (hplink->sgot == NULL)
1440 if (! elf32_hppa_create_dynamic_sections (dynobj, info))
1446 if (h->elf.got.refcount == -1)
1447 h->elf.got.refcount = 1;
1449 h->elf.got.refcount += 1;
1453 /* This is a global offset table entry for a local symbol. */
1454 if (local_got_refcounts == NULL)
1458 /* Allocate space for local got offsets and local
1459 plt offsets. Done this way to save polluting
1460 elf_obj_tdata with another target specific
1462 size = symtab_hdr->sh_info;
1463 size *= 2 * sizeof (bfd_signed_vma);
1464 local_got_refcounts = ((bfd_signed_vma *)
1465 bfd_alloc (abfd, size));
1466 if (local_got_refcounts == NULL)
1468 elf_local_got_refcounts (abfd) = local_got_refcounts;
1469 memset (local_got_refcounts, -1, (size_t) size);
1471 if (local_got_refcounts[r_symndx] == -1)
1472 local_got_refcounts[r_symndx] = 1;
1474 local_got_refcounts[r_symndx] += 1;
1478 if (need_entry & NEED_PLT)
1480 /* If we are creating a shared library, and this is a reloc
1481 against a weak symbol or a global symbol in a dynamic
1482 object, then we will be creating an import stub and a
1483 .plt entry for the symbol. Similarly, on a normal link
1484 to symbols defined in a dynamic object we'll need the
1485 import stub and a .plt entry. We don't know yet whether
1486 the symbol is defined or not, so make an entry anyway and
1487 clean up later in adjust_dynamic_symbol. */
1488 if ((sec->flags & SEC_ALLOC) != 0)
1492 if (h->elf.plt.refcount == -1)
1494 h->elf.plt.refcount = 1;
1495 h->elf.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1498 h->elf.plt.refcount += 1;
1500 /* If this .plt entry is for a plabel, mark it so
1501 that adjust_dynamic_symbol will keep the entry
1502 even if it appears to be local. */
1503 if (need_entry & PLT_PLABEL)
1506 else if (need_entry & PLT_PLABEL)
1508 bfd_signed_vma *local_plt_refcounts;
1510 if (local_got_refcounts == NULL)
1514 /* Allocate space for local got offsets and local
1516 size = symtab_hdr->sh_info;
1517 size *= 2 * sizeof (bfd_signed_vma);
1518 local_got_refcounts = ((bfd_signed_vma *)
1519 bfd_alloc (abfd, size));
1520 if (local_got_refcounts == NULL)
1522 elf_local_got_refcounts (abfd) = local_got_refcounts;
1523 memset (local_got_refcounts, -1, (size_t) size);
1525 local_plt_refcounts = (local_got_refcounts
1526 + symtab_hdr->sh_info);
1527 if (local_plt_refcounts[r_symndx] == -1)
1528 local_plt_refcounts[r_symndx] = 1;
1530 local_plt_refcounts[r_symndx] += 1;
1535 if (need_entry & (NEED_DYNREL | NEED_STUBREL))
1537 /* Flag this symbol as having a non-got, non-plt reference
1538 so that we generate copy relocs if it turns out to be
1540 if (need_entry == NEED_DYNREL
1543 && (sec->flags & SEC_READONLY) != 0)
1544 h->elf.elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
1546 /* If we are creating a shared library then we need to copy
1547 the reloc into the shared library. However, if we are
1548 linking with -Bsymbolic, we need only copy absolute
1549 relocs or relocs against symbols that are not defined in
1550 an object we are including in the link. PC- or DP- or
1551 DLT-relative relocs against any local sym or global sym
1552 with DEF_REGULAR set, can be discarded. At this point we
1553 have not seen all the input files, so it is possible that
1554 DEF_REGULAR is not set now but will be set later (it is
1555 never cleared). We account for that possibility below by
1556 storing information in the reloc_entries field of the
1559 A similar situation to the -Bsymbolic case occurs when
1560 creating shared libraries and symbol visibility changes
1561 render the symbol local.
1563 As it turns out, all the relocs we will be creating here
1564 are absolute, so we cannot remove them on -Bsymbolic
1565 links or visibility changes anyway. A STUB_REL reloc
1566 is absolute too, as in that case it is the reloc in the
1567 stub we will be creating, rather than copying the PCREL
1568 reloc in the branch.
1570 If on the other hand, we are creating an executable, we
1571 may need to keep relocations for symbols satisfied by a
1572 dynamic library if we manage to avoid copy relocs for the
1575 && (sec->flags & SEC_ALLOC) != 0
1576 && (IS_ABSOLUTE_RELOC (r_type)
1579 || h->elf.root.type == bfd_link_hash_defweak
1580 || (h->elf.elf_link_hash_flags
1581 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1583 && (sec->flags & SEC_ALLOC) != 0
1585 && (h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1586 && (h->elf.root.type == bfd_link_hash_defweak
1587 || (h->elf.elf_link_hash_flags
1588 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1594 if ((need_entry & NEED_STUBREL))
1597 /* Create a reloc section in dynobj and make room for
1604 hplink->root.dynobj = dynobj = abfd;
1606 name = bfd_elf_string_from_elf_section
1608 elf_elfheader (abfd)->e_shstrndx,
1609 elf_section_data (sec)->rel_hdr.sh_name);
1612 (*_bfd_error_handler)
1613 (_("Could not find relocation section for %s"),
1615 bfd_set_error (bfd_error_bad_value);
1619 if ((need_entry & NEED_STUBREL))
1621 bfd_size_type len = strlen (name) + sizeof (STUB_SUFFIX);
1622 char *newname = bfd_malloc (len);
1624 if (newname == NULL)
1626 strcpy (newname, name);
1627 strcpy (newname + len - sizeof (STUB_SUFFIX),
1632 srel = bfd_get_section_by_name (dynobj, name);
1637 srel = bfd_make_section (dynobj, name);
1638 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1639 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1640 if ((sec->flags & SEC_ALLOC) != 0)
1641 flags |= SEC_ALLOC | SEC_LOAD;
1643 || !bfd_set_section_flags (dynobj, srel, flags)
1644 || !bfd_set_section_alignment (dynobj, srel, 2))
1647 else if ((need_entry & NEED_STUBREL))
1650 if ((need_entry & NEED_STUBREL))
1656 #if ! LONG_BRANCH_PIC_IN_SHLIB
1657 /* If this is a function call, we only need one dynamic
1658 reloc for the stub as all calls to a particular
1659 function will go through the same stub. Actually, a
1660 long branch stub needs two relocations, but we count
1661 on some intelligence on the part of the dynamic
1663 if ((need_entry & NEED_STUBREL))
1665 doit = h->stub_reloc_sec != stubreloc;
1666 h->stub_reloc_sec = stubreloc;
1674 srel->_raw_size += sizeof (Elf32_External_Rela);
1676 /* Keep track of relocations we have entered for
1677 this global symbol, so that we can discard them
1678 later if necessary. */
1681 && (! IS_ABSOLUTE_RELOC (rtype)
1682 || (need_entry & NEED_STUBREL))))
1684 struct elf32_hppa_dyn_reloc_entry *p;
1686 for (p = h->reloc_entries; p != NULL; p = p->next)
1687 if (p->section == srel)
1692 p = ((struct elf32_hppa_dyn_reloc_entry *)
1693 bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
1696 p->next = h->reloc_entries;
1697 h->reloc_entries = p;
1702 /* NEED_STUBREL and NEED_DYNREL are never both
1703 set. Leave the count at zero for the
1704 NEED_STUBREL case as we only ever have one
1705 stub reloc per section per symbol, and this
1706 simplifies code to discard unneeded relocs. */
1707 if (! (need_entry & NEED_STUBREL))
1718 /* Return the section that should be marked against garbage collection
1719 for a given relocation. */
1722 elf32_hppa_gc_mark_hook (abfd, info, rel, h, sym)
1724 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1725 Elf_Internal_Rela *rel;
1726 struct elf_link_hash_entry *h;
1727 Elf_Internal_Sym *sym;
1731 switch ((unsigned int) ELF32_R_TYPE (rel->r_info))
1733 case R_PARISC_GNU_VTINHERIT:
1734 case R_PARISC_GNU_VTENTRY:
1738 switch (h->root.type)
1740 case bfd_link_hash_defined:
1741 case bfd_link_hash_defweak:
1742 return h->root.u.def.section;
1744 case bfd_link_hash_common:
1745 return h->root.u.c.p->section;
1754 if (!(elf_bad_symtab (abfd)
1755 && ELF_ST_BIND (sym->st_info) != STB_LOCAL)
1756 && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
1757 && sym->st_shndx != SHN_COMMON))
1759 return bfd_section_from_elf_index (abfd, sym->st_shndx);
1766 /* Update the got and plt entry reference counts for the section being
1770 elf32_hppa_gc_sweep_hook (abfd, info, sec, relocs)
1772 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1774 const Elf_Internal_Rela *relocs;
1776 Elf_Internal_Shdr *symtab_hdr;
1777 struct elf_link_hash_entry **sym_hashes;
1778 bfd_signed_vma *local_got_refcounts;
1779 bfd_signed_vma *local_plt_refcounts;
1780 const Elf_Internal_Rela *rel, *relend;
1781 unsigned long r_symndx;
1782 struct elf_link_hash_entry *h;
1783 struct elf32_hppa_link_hash_table *hplink;
1786 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1787 sym_hashes = elf_sym_hashes (abfd);
1788 local_got_refcounts = elf_local_got_refcounts (abfd);
1789 local_plt_refcounts = local_got_refcounts;
1790 if (local_plt_refcounts != NULL)
1791 local_plt_refcounts += symtab_hdr->sh_info;
1792 hplink = hppa_link_hash_table (info);
1793 dynobj = hplink->root.dynobj;
1797 relend = relocs + sec->reloc_count;
1798 for (rel = relocs; rel < relend; rel++)
1799 switch ((unsigned int) ELF32_R_TYPE (rel->r_info))
1801 case R_PARISC_DLTIND14F:
1802 case R_PARISC_DLTIND14R:
1803 case R_PARISC_DLTIND21L:
1804 r_symndx = ELF32_R_SYM (rel->r_info);
1805 if (r_symndx >= symtab_hdr->sh_info)
1807 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1808 if (h->got.refcount > 0)
1809 h->got.refcount -= 1;
1811 else if (local_got_refcounts != NULL)
1813 if (local_got_refcounts[r_symndx] > 0)
1814 local_got_refcounts[r_symndx] -= 1;
1818 case R_PARISC_PCREL12F:
1819 case R_PARISC_PCREL17C:
1820 case R_PARISC_PCREL17F:
1821 case R_PARISC_PCREL22F:
1822 r_symndx = ELF32_R_SYM (rel->r_info);
1823 if (r_symndx >= symtab_hdr->sh_info)
1825 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1826 if (h->plt.refcount > 0)
1827 h->plt.refcount -= 1;
1831 case R_PARISC_PLABEL14R:
1832 case R_PARISC_PLABEL21L:
1833 case R_PARISC_PLABEL32:
1834 r_symndx = ELF32_R_SYM (rel->r_info);
1835 if (r_symndx >= symtab_hdr->sh_info)
1837 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1838 if (h->plt.refcount > 0)
1839 h->plt.refcount -= 1;
1841 else if (local_plt_refcounts != NULL)
1843 if (local_plt_refcounts[r_symndx] > 0)
1844 local_plt_refcounts[r_symndx] -= 1;
1855 /* Our own version of hide_symbol, so that we can keep plt entries for
1859 elf32_hppa_hide_symbol (info, h)
1860 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1861 struct elf_link_hash_entry *h;
1863 if ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)
1865 if (! ((struct elf32_hppa_link_hash_entry *) h)->plabel)
1867 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1868 h->plt.offset = (bfd_vma) -1;
1872 /* This is the condition under which elf32_hppa_finish_dynamic_symbol
1873 will be called from elflink.h. If elflink.h doesn't call our
1874 finish_dynamic_symbol routine, we'll need to do something about
1875 initializing any .plt and .got entries in elf32_hppa_relocate_section. */
1876 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \
1878 && ((INFO)->shared \
1879 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
1880 && ((H)->dynindx != -1 \
1881 || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
1883 /* Adjust a symbol defined by a dynamic object and referenced by a
1884 regular object. The current definition is in some section of the
1885 dynamic object, but we're not including those sections. We have to
1886 change the definition to something the rest of the link can
1890 elf32_hppa_adjust_dynamic_symbol (info, h)
1891 struct bfd_link_info *info;
1892 struct elf_link_hash_entry *h;
1895 struct elf32_hppa_link_hash_table *hplink;
1898 hplink = hppa_link_hash_table (info);
1899 dynobj = hplink->root.dynobj;
1901 /* If this is a function, put it in the procedure linkage table. We
1902 will fill in the contents of the procedure linkage table later,
1903 when we know the address of the .got section. */
1904 if (h->type == STT_FUNC
1905 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1908 && h->plt.refcount > 0
1909 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1910 && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0)
1912 ((struct elf32_hppa_link_hash_entry *) h)->maybe_pic_call = 1;
1915 if (h->plt.refcount <= 0
1916 || ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
1917 && h->root.type != bfd_link_hash_defweak
1918 && ! ((struct elf32_hppa_link_hash_entry *) h)->plabel
1919 && (!info->shared || info->symbolic)))
1921 /* The .plt entry is not needed when:
1922 a) Garbage collection has removed all references to the
1924 b) We know for certain the symbol is defined in this
1925 object, and it's not a weak definition, nor is the symbol
1926 used by a plabel relocation. Either this object is the
1927 application or we are doing a shared symbolic link. */
1929 /* As a special sop to the hppa ABI, we keep a .plt entry
1930 for functions in sections containing PIC code. */
1931 if (((struct elf32_hppa_link_hash_entry *) h)->maybe_pic_call)
1932 ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1;
1935 h->plt.offset = (bfd_vma) -1;
1936 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1943 /* If this is a weak symbol, and there is a real definition, the
1944 processor independent code will have arranged for us to see the
1945 real definition first, and we can just use the same value. */
1946 if (h->weakdef != NULL)
1948 if (h->weakdef->root.type != bfd_link_hash_defined
1949 && h->weakdef->root.type != bfd_link_hash_defweak)
1951 h->root.u.def.section = h->weakdef->root.u.def.section;
1952 h->root.u.def.value = h->weakdef->root.u.def.value;
1956 /* This is a reference to a symbol defined by a dynamic object which
1957 is not a function. */
1959 /* If we are creating a shared library, we must presume that the
1960 only references to the symbol are via the global offset table.
1961 For such cases we need not do anything here; the relocations will
1962 be handled correctly by relocate_section. */
1966 /* If there are no references to this symbol that do not use the
1967 GOT, we don't need to generate a copy reloc. */
1968 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1971 /* We must allocate the symbol in our .dynbss section, which will
1972 become part of the .bss section of the executable. There will be
1973 an entry for this symbol in the .dynsym section. The dynamic
1974 object will contain position independent code, so all references
1975 from the dynamic object to this symbol will go through the global
1976 offset table. The dynamic linker will use the .dynsym entry to
1977 determine the address it must put in the global offset table, so
1978 both the dynamic object and the regular object will refer to the
1979 same memory location for the variable. */
1981 s = hplink->sdynbss;
1983 /* We must generate a COPY reloc to tell the dynamic linker to
1984 copy the initial value out of the dynamic object and into the
1985 runtime process image. We need to remember the offset into the
1986 .rela.bss section we are going to use. */
1987 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1991 srel = hplink->srelbss;
1992 srel->_raw_size += sizeof (Elf32_External_Rela);
1993 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1997 /* We need to figure out the alignment required for this symbol. I
1998 have no idea how other ELF linkers handle this. */
1999 unsigned int power_of_two;
2001 power_of_two = bfd_log2 (h->size);
2002 if (power_of_two > 3)
2005 /* Apply the required alignment. */
2006 s->_raw_size = BFD_ALIGN (s->_raw_size,
2007 (bfd_size_type) (1 << power_of_two));
2008 if (power_of_two > bfd_get_section_alignment (dynobj, s))
2010 if (! bfd_set_section_alignment (dynobj, s, power_of_two))
2014 /* Define the symbol as being at this point in the section. */
2015 h->root.u.def.section = s;
2016 h->root.u.def.value = s->_raw_size;
2018 /* Increment the section size to make room for the symbol. */
2019 s->_raw_size += h->size;
2024 /* Called via elf_link_hash_traverse to create .plt entries for an
2025 application that uses statically linked PIC functions. Similar to
2026 the first part of elf32_hppa_adjust_dynamic_symbol. */
2029 hppa_handle_PIC_calls (h, inf)
2030 struct elf_link_hash_entry *h;
2031 PTR inf ATTRIBUTE_UNUSED;
2033 if (! (h->plt.refcount > 0
2034 && (h->root.type == bfd_link_hash_defined
2035 || h->root.type == bfd_link_hash_defweak)
2036 && (h->root.u.def.section->flags & SEC_HAS_GOT_REF) != 0))
2038 h->plt.offset = (bfd_vma) -1;
2039 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2043 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
2044 ((struct elf32_hppa_link_hash_entry *) h)->maybe_pic_call = 1;
2045 ((struct elf32_hppa_link_hash_entry *) h)->pic_call = 1;
2050 /* Allocate space in .plt, .got and associated reloc sections for
2054 allocate_plt_and_got_and_discard_relocs (h, inf)
2055 struct elf_link_hash_entry *h;
2058 struct bfd_link_info *info;
2059 struct elf32_hppa_link_hash_table *hplink;
2061 struct elf32_hppa_link_hash_entry *eh;
2063 if (h->root.type == bfd_link_hash_indirect
2064 || h->root.type == bfd_link_hash_warning)
2067 info = (struct bfd_link_info *) inf;
2068 hplink = hppa_link_hash_table (info);
2069 if ((hplink->root.dynamic_sections_created
2070 && h->plt.refcount > 0)
2071 || ((struct elf32_hppa_link_hash_entry *) h)->pic_call)
2073 /* Make sure this symbol is output as a dynamic symbol.
2074 Undefined weak syms won't yet be marked as dynamic. */
2075 if (h->dynindx == -1
2076 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
2077 && h->type != STT_PARISC_MILLI
2078 && !((struct elf32_hppa_link_hash_entry *) h)->pic_call)
2080 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2084 /* Make an entry in the .plt section. */
2086 h->plt.offset = s->_raw_size;
2087 if (PLABEL_PLT_ENTRY_SIZE != PLT_ENTRY_SIZE
2088 && ((struct elf32_hppa_link_hash_entry *) h)->plabel
2089 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
2091 /* Add some extra space for the dynamic linker to use. */
2092 s->_raw_size += PLABEL_PLT_ENTRY_SIZE;
2095 s->_raw_size += PLT_ENTRY_SIZE;
2097 if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call
2098 && WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h))
2100 /* We also need to make an entry in the .rela.plt section. */
2101 hplink->srelplt->_raw_size += sizeof (Elf32_External_Rela);
2102 hplink->need_plt_stub = 1;
2107 h->plt.offset = (bfd_vma) -1;
2108 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
2111 if (h->got.refcount > 0)
2115 /* Make sure this symbol is output as a dynamic symbol.
2116 Undefined weak syms won't yet be marked as dynamic. */
2117 if (h->dynindx == -1
2118 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
2119 && h->type != STT_PARISC_MILLI)
2121 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2126 h->got.offset = s->_raw_size;
2127 s->_raw_size += GOT_ENTRY_SIZE;
2128 dyn = hplink->root.dynamic_sections_created;
2129 if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
2130 hplink->srelgot->_raw_size += sizeof (Elf32_External_Rela);
2133 h->got.offset = (bfd_vma) -1;
2135 /* If this is a -Bsymbolic shared link, then we need to discard all
2136 space allocated for dynamic relocs against symbols defined in a
2137 regular object. For the normal shared case, discard space for
2138 relocs that have become local due to symbol visibility changes.
2139 For the non-shared case, discard space for symbols which turn out
2140 to need copy relocs or are not dynamic. We also need to lose
2141 relocs we've allocated for long branch stubs if we know we won't
2142 be generating a stub. */
2144 eh = (struct elf32_hppa_link_hash_entry *) h;
2145 if (eh->reloc_entries == NULL)
2148 /* First handle the non-shared case. */
2150 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2151 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2152 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
2153 || (hplink->root.dynamic_sections_created
2154 && (h->root.type == bfd_link_hash_undefweak
2155 || h->root.type == bfd_link_hash_undefined))))
2157 /* Make sure this symbol is output as a dynamic symbol.
2158 Undefined weak syms won't yet be marked as dynamic. */
2159 if (h->dynindx == -1
2160 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0
2161 && h->type != STT_PARISC_MILLI)
2163 if (! bfd_elf32_link_record_dynamic_symbol (info, h))
2167 /* If that succeeded, we know we'll be keeping all the relocs. */
2168 if (h->dynindx != -1)
2172 #if ! LONG_BRANCH_PIC_IN_SHLIB && LONG_BRANCH_VIA_PLT
2173 /* Handle the stub reloc case. If we have a plt entry for the
2174 function, we won't be needing long branch stubs. c->count will
2175 only be zero for stub relocs, which provides a handy way of
2176 flagging these relocs, and means we need do nothing special for
2177 the forced local and symbolic link case. */
2178 if (eh->stub_reloc_sec != NULL
2179 && eh->elf.plt.offset != (bfd_vma) -1)
2181 struct elf32_hppa_dyn_reloc_entry *c;
2183 for (c = eh->reloc_entries; c != NULL; c = c->next)
2185 c->section->_raw_size -= sizeof (Elf32_External_Rela);
2189 /* Discard any relocs in the non-shared case. For the shared case,
2190 if a symbol has been forced local or we have found a regular
2191 definition for the symbolic link case, then we won't be needing
2194 || ((eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0
2195 && ((eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0
2196 || info->symbolic)))
2198 struct elf32_hppa_dyn_reloc_entry *c;
2200 for (c = eh->reloc_entries; c != NULL; c = c->next)
2201 c->section->_raw_size -= c->count * sizeof (Elf32_External_Rela);
2207 /* This function is called via elf_link_hash_traverse to force
2208 millicode symbols local so they do not end up as globals in the
2209 dynamic symbol table. We ought to be able to do this in
2210 adjust_dynamic_symbol, but our adjust_dynamic_symbol is not called
2211 for all dynamic symbols. Arguably, this is a bug in
2212 elf_adjust_dynamic_symbol. */
2215 clobber_millicode_symbols (h, info)
2216 struct elf_link_hash_entry *h;
2217 struct bfd_link_info *info;
2219 /* We only want to remove these from the dynamic symbol table.
2220 Therefore we do not leave ELF_LINK_FORCED_LOCAL set. */
2221 if (h->type == STT_PARISC_MILLI)
2223 unsigned short oldflags = h->elf_link_hash_flags;
2224 h->elf_link_hash_flags |= ELF_LINK_FORCED_LOCAL;
2225 elf32_hppa_hide_symbol (info, h);
2226 h->elf_link_hash_flags &= ~ELF_LINK_FORCED_LOCAL;
2227 h->elf_link_hash_flags |= oldflags & ELF_LINK_FORCED_LOCAL;
2232 /* Set the sizes of the dynamic sections. */
2235 elf32_hppa_size_dynamic_sections (output_bfd, info)
2237 struct bfd_link_info *info;
2239 struct elf32_hppa_link_hash_table *hplink;
2246 hplink = hppa_link_hash_table (info);
2247 dynobj = hplink->root.dynobj;
2251 if (hplink->root.dynamic_sections_created)
2253 /* Set the contents of the .interp section to the interpreter. */
2256 s = bfd_get_section_by_name (dynobj, ".interp");
2259 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
2260 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2263 /* Force millicode symbols local. */
2264 elf_link_hash_traverse (&hplink->root,
2265 clobber_millicode_symbols,
2270 /* Run through the function symbols, looking for any that are
2271 PIC, and allocate space for the necessary .plt entries so
2272 that %r19 will be set up. */
2274 elf_link_hash_traverse (&hplink->root,
2275 hppa_handle_PIC_calls,
2279 /* Set up .got and .plt offsets for local syms. */
2280 for (i = info->input_bfds; i; i = i->link_next)
2282 bfd_signed_vma *local_got;
2283 bfd_signed_vma *end_local_got;
2284 bfd_signed_vma *local_plt;
2285 bfd_signed_vma *end_local_plt;
2286 bfd_size_type locsymcount;
2287 Elf_Internal_Shdr *symtab_hdr;
2290 if (bfd_get_flavour (i) != bfd_target_elf_flavour)
2293 local_got = elf_local_got_refcounts (i);
2297 symtab_hdr = &elf_tdata (i)->symtab_hdr;
2298 locsymcount = symtab_hdr->sh_info;
2299 end_local_got = local_got + locsymcount;
2301 srel = hplink->srelgot;
2302 for (; local_got < end_local_got; ++local_got)
2306 *local_got = s->_raw_size;
2307 s->_raw_size += GOT_ENTRY_SIZE;
2309 srel->_raw_size += sizeof (Elf32_External_Rela);
2312 *local_got = (bfd_vma) -1;
2315 local_plt = end_local_got;
2316 end_local_plt = local_plt + locsymcount;
2317 if (! hplink->root.dynamic_sections_created)
2319 /* Won't be used, but be safe. */
2320 for (; local_plt < end_local_plt; ++local_plt)
2321 *local_plt = (bfd_vma) -1;
2326 srel = hplink->srelplt;
2327 for (; local_plt < end_local_plt; ++local_plt)
2331 *local_plt = s->_raw_size;
2332 s->_raw_size += PLT_ENTRY_SIZE;
2334 srel->_raw_size += sizeof (Elf32_External_Rela);
2337 *local_plt = (bfd_vma) -1;
2342 /* Allocate global sym .plt and .got entries. Also discard all
2344 elf_link_hash_traverse (&hplink->root,
2345 allocate_plt_and_got_and_discard_relocs,
2348 /* The check_relocs and adjust_dynamic_symbol entry points have
2349 determined the sizes of the various dynamic sections. Allocate
2353 for (s = dynobj->sections; s != NULL; s = s->next)
2355 if ((s->flags & SEC_LINKER_CREATED) == 0)
2358 if (s == hplink->splt)
2360 if (hplink->need_plt_stub)
2362 /* Make space for the plt stub at the end of the .plt
2363 section. We want this stub right at the end, up
2364 against the .got section. */
2365 int gotalign = bfd_section_alignment (dynobj, hplink->sgot);
2366 int pltalign = bfd_section_alignment (dynobj, s);
2369 if (gotalign > pltalign)
2370 bfd_set_section_alignment (dynobj, s, gotalign);
2371 mask = ((bfd_size_type) 1 << gotalign) - 1;
2372 s->_raw_size = (s->_raw_size + sizeof (plt_stub) + mask) & ~mask;
2375 else if (s == hplink->sgot)
2377 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2379 if (s->_raw_size != 0)
2382 const char *outname;
2384 /* Remember whether there are any reloc sections other
2386 if (s != hplink->srelplt)
2389 /* If this relocation section applies to a read only
2390 section, then we probably need a DT_TEXTREL entry. */
2391 outname = bfd_get_section_name (output_bfd,
2393 target = bfd_get_section_by_name (output_bfd, outname + 5);
2395 && (target->flags & SEC_READONLY) != 0
2396 && (target->flags & SEC_ALLOC) != 0)
2399 /* We use the reloc_count field as a counter if we need
2400 to copy relocs into the output file. */
2406 /* It's not one of our sections, so don't allocate space. */
2410 if (s->_raw_size == 0)
2412 /* If we don't need this section, strip it from the
2413 output file. This is mostly to handle .rela.bss and
2414 .rela.plt. We must create both sections in
2415 create_dynamic_sections, because they must be created
2416 before the linker maps input sections to output
2417 sections. The linker does that before
2418 adjust_dynamic_symbol is called, and it is that
2419 function which decides whether anything needs to go
2420 into these sections. */
2421 _bfd_strip_section_from_output (info, s);
2425 /* Allocate memory for the section contents. Zero it, because
2426 we may not fill in all the reloc sections. */
2427 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2428 if (s->contents == NULL && s->_raw_size != 0)
2432 if (hplink->root.dynamic_sections_created)
2434 /* Like IA-64 and HPPA64, always create a DT_PLTGOT. It
2435 actually has nothing to do with the PLT, it is how we
2436 communicate the LTP value of a load module to the dynamic
2438 #define add_dynamic_entry(TAG, VAL) \
2439 bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
2441 if (!add_dynamic_entry (DT_PLTGOT, 0))
2444 /* Add some entries to the .dynamic section. We fill in the
2445 values later, in elf32_hppa_finish_dynamic_sections, but we
2446 must add the entries now so that we get the correct size for
2447 the .dynamic section. The DT_DEBUG entry is filled in by the
2448 dynamic linker and used by the debugger. */
2451 if (!add_dynamic_entry (DT_DEBUG, 0))
2455 if (hplink->srelplt->_raw_size != 0)
2457 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
2458 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2459 || !add_dynamic_entry (DT_JMPREL, 0))
2465 if (!add_dynamic_entry (DT_RELA, 0)
2466 || !add_dynamic_entry (DT_RELASZ, 0)
2467 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2473 if (!add_dynamic_entry (DT_TEXTREL, 0))
2475 info->flags |= DF_TEXTREL;
2478 #undef add_dynamic_entry
2483 /* External entry points for sizing and building linker stubs. */
2485 /* Determine and set the size of the stub section for a final link.
2487 The basic idea here is to examine all the relocations looking for
2488 PC-relative calls to a target that is unreachable with a "bl"
2492 elf32_hppa_size_stubs (output_bfd, stub_bfd, info, multi_subspace, group_size,
2493 add_stub_section, layout_sections_again)
2496 struct bfd_link_info *info;
2497 boolean multi_subspace;
2498 bfd_signed_vma group_size;
2499 asection * (*add_stub_section) PARAMS ((const char *, asection *));
2500 void (*layout_sections_again) PARAMS ((void));
2504 asection **input_list, **list;
2505 Elf_Internal_Sym *local_syms, **all_local_syms;
2506 unsigned int bfd_indx, bfd_count;
2507 int top_id, top_index;
2508 struct elf32_hppa_link_hash_table *hplink;
2509 bfd_size_type stub_group_size;
2510 boolean stubs_always_before_branch;
2511 boolean stub_changed = 0;
2515 hplink = hppa_link_hash_table (info);
2517 /* Stash our params away. */
2518 hplink->stub_bfd = stub_bfd;
2519 hplink->multi_subspace = multi_subspace;
2520 hplink->add_stub_section = add_stub_section;
2521 hplink->layout_sections_again = layout_sections_again;
2522 stubs_always_before_branch = group_size < 0;
2524 stub_group_size = -group_size;
2526 stub_group_size = group_size;
2527 if (stub_group_size == 1)
2529 /* Default values. */
2530 stub_group_size = 8000000;
2531 if (hplink->has_17bit_branch || hplink->multi_subspace)
2532 stub_group_size = 250000;
2533 if (hplink->has_12bit_branch)
2534 stub_group_size = 7812;
2537 /* Count the number of input BFDs and find the top input section id. */
2538 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2540 input_bfd = input_bfd->link_next)
2543 for (section = input_bfd->sections;
2545 section = section->next)
2547 if (top_id < section->id)
2548 top_id = section->id;
2552 amt = sizeof (struct map_stub) * (top_id + 1);
2553 hplink->stub_group = (struct map_stub *) bfd_zmalloc (amt);
2554 if (hplink->stub_group == NULL)
2557 /* Make a list of input sections for each output section included in
2560 We can't use output_bfd->section_count here to find the top output
2561 section index as some sections may have been removed, and
2562 _bfd_strip_section_from_output doesn't renumber the indices. */
2563 for (section = output_bfd->sections, top_index = 0;
2565 section = section->next)
2567 if (top_index < section->index)
2568 top_index = section->index;
2571 amt = sizeof (asection *) * (top_index + 1);
2572 input_list = (asection **) bfd_malloc (amt);
2573 if (input_list == NULL)
2576 /* For sections we aren't interested in, mark their entries with a
2577 value we can check later. */
2578 list = input_list + top_index;
2580 *list = bfd_abs_section_ptr;
2581 while (list-- != input_list);
2583 for (section = output_bfd->sections;
2585 section = section->next)
2587 if ((section->flags & SEC_CODE) != 0)
2588 input_list[section->index] = NULL;
2591 /* Now actually build the lists. */
2592 for (input_bfd = info->input_bfds;
2594 input_bfd = input_bfd->link_next)
2596 for (section = input_bfd->sections;
2598 section = section->next)
2600 if (section->output_section != NULL
2601 && section->output_section->owner == output_bfd
2602 && section->output_section->index <= top_index)
2604 list = input_list + section->output_section->index;
2605 if (*list != bfd_abs_section_ptr)
2607 /* Steal the link_sec pointer for our list. */
2608 #define PREV_SEC(sec) (hplink->stub_group[(sec)->id].link_sec)
2609 /* This happens to make the list in reverse order,
2610 which is what we want. */
2611 PREV_SEC (section) = *list;
2618 /* See whether we can group stub sections together. Grouping stub
2619 sections may result in fewer stubs. More importantly, we need to
2620 put all .init* and .fini* stubs at the beginning of the .init or
2621 .fini output sections respectively, because glibc splits the
2622 _init and _fini functions into multiple parts. Putting a stub in
2623 the middle of a function is not a good idea. */
2624 list = input_list + top_index;
2627 asection *tail = *list;
2628 if (tail == bfd_abs_section_ptr)
2630 while (tail != NULL)
2634 bfd_size_type total;
2637 if (tail->_cooked_size)
2638 total = tail->_cooked_size;
2640 total = tail->_raw_size;
2641 while ((prev = PREV_SEC (curr)) != NULL
2642 && ((total += curr->output_offset - prev->output_offset)
2646 /* OK, the size from the start of CURR to the end is less
2647 than 250000 bytes and thus can be handled by one stub
2648 section. (or the tail section is itself larger than
2649 250000 bytes, in which case we may be toast.)
2650 We should really be keeping track of the total size of
2651 stubs added here, as stubs contribute to the final output
2652 section size. That's a little tricky, and this way will
2653 only break if stubs added total more than 12144 bytes, or
2654 1518 long branch stubs. It seems unlikely for more than
2655 1518 different functions to be called, especially from
2656 code only 250000 bytes long. */
2659 prev = PREV_SEC (tail);
2660 /* Set up this stub group. */
2661 hplink->stub_group[tail->id].link_sec = curr;
2663 while (tail != curr && (tail = prev) != NULL);
2665 /* But wait, there's more! Input sections up to 250000
2666 bytes before the stub section can be handled by it too. */
2667 if (!stubs_always_before_branch)
2671 && ((total += tail->output_offset - prev->output_offset)
2675 prev = PREV_SEC (tail);
2676 hplink->stub_group[tail->id].link_sec = curr;
2682 while (list-- != input_list);
2686 /* We want to read in symbol extension records only once. To do this
2687 we need to read in the local symbols in parallel and save them for
2688 later use; so hold pointers to the local symbols in an array. */
2689 amt = sizeof (Elf_Internal_Sym *) * bfd_count;
2690 all_local_syms = (Elf_Internal_Sym **) bfd_zmalloc (amt);
2691 if (all_local_syms == NULL)
2694 /* Walk over all the input BFDs, swapping in local symbols.
2695 If we are creating a shared library, create hash entries for the
2697 for (input_bfd = info->input_bfds, bfd_indx = 0;
2699 input_bfd = input_bfd->link_next, bfd_indx++)
2701 Elf_Internal_Shdr *symtab_hdr;
2702 Elf_Internal_Sym *isym;
2703 Elf32_External_Sym *ext_syms, *esym, *end_sy;
2704 bfd_size_type sec_size;
2706 /* We'll need the symbol table in a second. */
2707 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2708 if (symtab_hdr->sh_info == 0)
2711 /* We need an array of the local symbols attached to the input bfd.
2712 Unfortunately, we're going to have to read & swap them in. */
2713 sec_size = symtab_hdr->sh_info;
2714 sec_size *= sizeof (Elf_Internal_Sym);
2715 local_syms = (Elf_Internal_Sym *) bfd_malloc (sec_size);
2716 if (local_syms == NULL)
2718 goto error_ret_free_local;
2720 all_local_syms[bfd_indx] = local_syms;
2721 sec_size = symtab_hdr->sh_info;
2722 sec_size *= sizeof (Elf32_External_Sym);
2723 ext_syms = (Elf32_External_Sym *) bfd_malloc (sec_size);
2724 if (ext_syms == NULL)
2726 goto error_ret_free_local;
2729 if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
2730 || (bfd_bread (ext_syms, sec_size, input_bfd) != sec_size))
2733 goto error_ret_free_local;
2736 /* Swap the local symbols in. */
2739 for (end_sy = esym + symtab_hdr->sh_info; esym < end_sy; esym++, isym++)
2740 bfd_elf32_swap_symbol_in (input_bfd, esym, isym);
2742 /* Now we can free the external symbols. */
2745 #if ! LONG_BRANCH_PIC_IN_SHLIB
2746 /* If this is a shared link, find all the stub reloc sections. */
2748 for (section = input_bfd->sections;
2750 section = section->next)
2753 asection *reloc_sec;
2755 name = bfd_malloc ((bfd_size_type) strlen (section->name)
2756 + sizeof STUB_SUFFIX
2760 sprintf (name, ".rela%s%s", section->name, STUB_SUFFIX);
2761 reloc_sec = bfd_get_section_by_name (hplink->root.dynobj, name);
2762 hplink->stub_group[section->id].reloc_sec = reloc_sec;
2767 if (info->shared && hplink->multi_subspace)
2769 struct elf_link_hash_entry **sym_hashes;
2770 struct elf_link_hash_entry **end_hashes;
2771 unsigned int symcount;
2773 symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
2774 - symtab_hdr->sh_info);
2775 sym_hashes = elf_sym_hashes (input_bfd);
2776 end_hashes = sym_hashes + symcount;
2778 /* Look through the global syms for functions; We need to
2779 build export stubs for all globally visible functions. */
2780 for (; sym_hashes < end_hashes; sym_hashes++)
2782 struct elf32_hppa_link_hash_entry *hash;
2784 hash = (struct elf32_hppa_link_hash_entry *) *sym_hashes;
2786 while (hash->elf.root.type == bfd_link_hash_indirect
2787 || hash->elf.root.type == bfd_link_hash_warning)
2788 hash = ((struct elf32_hppa_link_hash_entry *)
2789 hash->elf.root.u.i.link);
2791 /* At this point in the link, undefined syms have been
2792 resolved, so we need to check that the symbol was
2793 defined in this BFD. */
2794 if ((hash->elf.root.type == bfd_link_hash_defined
2795 || hash->elf.root.type == bfd_link_hash_defweak)
2796 && hash->elf.type == STT_FUNC
2797 && hash->elf.root.u.def.section->output_section != NULL
2798 && (hash->elf.root.u.def.section->output_section->owner
2800 && hash->elf.root.u.def.section->owner == input_bfd
2801 && (hash->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
2802 && !(hash->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)
2803 && ELF_ST_VISIBILITY (hash->elf.other) == STV_DEFAULT)
2806 const char *stub_name;
2807 struct elf32_hppa_stub_hash_entry *stub_entry;
2809 sec = hash->elf.root.u.def.section;
2810 stub_name = hash->elf.root.root.string;
2811 stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table,
2814 if (stub_entry == NULL)
2816 stub_entry = hppa_add_stub (stub_name, sec, hplink);
2818 goto error_ret_free_local;
2820 stub_entry->target_value = hash->elf.root.u.def.value;
2821 stub_entry->target_section = hash->elf.root.u.def.section;
2822 stub_entry->stub_type = hppa_stub_export;
2823 stub_entry->h = hash;
2828 (*_bfd_error_handler) (_("%s: duplicate export stub %s"),
2829 bfd_get_filename (input_bfd),
2841 for (input_bfd = info->input_bfds, bfd_indx = 0;
2843 input_bfd = input_bfd->link_next, bfd_indx++)
2845 Elf_Internal_Shdr *symtab_hdr;
2847 /* We'll need the symbol table in a second. */
2848 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2849 if (symtab_hdr->sh_info == 0)
2852 local_syms = all_local_syms[bfd_indx];
2854 /* Walk over each section attached to the input bfd. */
2855 for (section = input_bfd->sections;
2857 section = section->next)
2859 Elf_Internal_Shdr *input_rel_hdr;
2860 Elf32_External_Rela *external_relocs, *erelaend, *erela;
2861 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
2863 /* If there aren't any relocs, then there's nothing more
2865 if ((section->flags & SEC_RELOC) == 0
2866 || section->reloc_count == 0)
2869 /* If this section is a link-once section that will be
2870 discarded, then don't create any stubs. */
2871 if (section->output_section == NULL
2872 || section->output_section->owner != output_bfd)
2875 /* Allocate space for the external relocations. */
2876 amt = section->reloc_count;
2877 amt *= sizeof (Elf32_External_Rela);
2878 external_relocs = (Elf32_External_Rela *) bfd_malloc (amt);
2879 if (external_relocs == NULL)
2881 goto error_ret_free_local;
2884 /* Likewise for the internal relocations. */
2885 amt = section->reloc_count;
2886 amt *= sizeof (Elf_Internal_Rela);
2887 internal_relocs = (Elf_Internal_Rela *) bfd_malloc (amt);
2888 if (internal_relocs == NULL)
2890 free (external_relocs);
2891 goto error_ret_free_local;
2894 /* Read in the external relocs. */
2895 input_rel_hdr = &elf_section_data (section)->rel_hdr;
2896 if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0
2897 || bfd_bread (external_relocs,
2898 input_rel_hdr->sh_size,
2899 input_bfd) != input_rel_hdr->sh_size)
2901 free (external_relocs);
2902 error_ret_free_internal:
2903 free (internal_relocs);
2904 goto error_ret_free_local;
2907 /* Swap in the relocs. */
2908 erela = external_relocs;
2909 erelaend = erela + section->reloc_count;
2910 irela = internal_relocs;
2911 for (; erela < erelaend; erela++, irela++)
2912 bfd_elf32_swap_reloca_in (input_bfd, erela, irela);
2914 /* We're done with the external relocs, free them. */
2915 free (external_relocs);
2917 /* Now examine each relocation. */
2918 irela = internal_relocs;
2919 irelaend = irela + section->reloc_count;
2920 for (; irela < irelaend; irela++)
2922 unsigned int r_type, r_indx;
2923 enum elf32_hppa_stub_type stub_type;
2924 struct elf32_hppa_stub_hash_entry *stub_entry;
2927 bfd_vma destination;
2928 struct elf32_hppa_link_hash_entry *hash;
2930 const asection *id_sec;
2932 r_type = ELF32_R_TYPE (irela->r_info);
2933 r_indx = ELF32_R_SYM (irela->r_info);
2935 if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
2937 bfd_set_error (bfd_error_bad_value);
2938 goto error_ret_free_internal;
2941 /* Only look for stubs on call instructions. */
2942 if (r_type != (unsigned int) R_PARISC_PCREL12F
2943 && r_type != (unsigned int) R_PARISC_PCREL17F
2944 && r_type != (unsigned int) R_PARISC_PCREL22F)
2947 /* Now determine the call target, its name, value,
2953 if (r_indx < symtab_hdr->sh_info)
2955 /* It's a local symbol. */
2956 Elf_Internal_Sym *sym;
2957 Elf_Internal_Shdr *hdr;
2959 sym = local_syms + r_indx;
2960 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
2961 sym_sec = hdr->bfd_section;
2962 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2963 sym_value = sym->st_value;
2964 destination = (sym_value + irela->r_addend
2965 + sym_sec->output_offset
2966 + sym_sec->output_section->vma);
2970 /* It's an external symbol. */
2973 e_indx = r_indx - symtab_hdr->sh_info;
2974 hash = ((struct elf32_hppa_link_hash_entry *)
2975 elf_sym_hashes (input_bfd)[e_indx]);
2977 while (hash->elf.root.type == bfd_link_hash_indirect
2978 || hash->elf.root.type == bfd_link_hash_warning)
2979 hash = ((struct elf32_hppa_link_hash_entry *)
2980 hash->elf.root.u.i.link);
2982 if (hash->elf.root.type == bfd_link_hash_defined
2983 || hash->elf.root.type == bfd_link_hash_defweak)
2985 sym_sec = hash->elf.root.u.def.section;
2986 sym_value = hash->elf.root.u.def.value;
2987 if (sym_sec->output_section != NULL)
2988 destination = (sym_value + irela->r_addend
2989 + sym_sec->output_offset
2990 + sym_sec->output_section->vma);
2992 else if (hash->elf.root.type == bfd_link_hash_undefweak)
2997 else if (hash->elf.root.type == bfd_link_hash_undefined)
3000 && !info->no_undefined
3001 && (ELF_ST_VISIBILITY (hash->elf.other)
3007 bfd_set_error (bfd_error_bad_value);
3008 goto error_ret_free_internal;
3012 /* Determine what (if any) linker stub is needed. */
3013 stub_type = hppa_type_of_stub (section, irela, hash,
3015 if (stub_type == hppa_stub_none)
3018 /* Support for grouping stub sections. */
3019 id_sec = hplink->stub_group[section->id].link_sec;
3021 /* Get the name of this stub. */
3022 stub_name = hppa_stub_name (id_sec, sym_sec, hash, irela);
3024 goto error_ret_free_internal;
3026 stub_entry = hppa_stub_hash_lookup (&hplink->stub_hash_table,
3029 if (stub_entry != NULL)
3031 /* The proper stub has already been created. */
3036 stub_entry = hppa_add_stub (stub_name, section, hplink);
3037 if (stub_entry == NULL)
3040 goto error_ret_free_local;
3043 stub_entry->target_value = sym_value;
3044 stub_entry->target_section = sym_sec;
3045 stub_entry->stub_type = stub_type;
3048 if (stub_type == hppa_stub_import)
3049 stub_entry->stub_type = hppa_stub_import_shared;
3050 else if (stub_type == hppa_stub_long_branch
3051 && (LONG_BRANCH_PIC_IN_SHLIB || hash == NULL))
3052 stub_entry->stub_type = hppa_stub_long_branch_shared;
3054 stub_entry->h = hash;
3058 /* We're done with the internal relocs, free them. */
3059 free (internal_relocs);
3066 /* OK, we've added some stubs. Find out the new size of the
3068 for (stub_sec = hplink->stub_bfd->sections;
3070 stub_sec = stub_sec->next)
3072 stub_sec->_raw_size = 0;
3073 stub_sec->_cooked_size = 0;
3075 #if ! LONG_BRANCH_PIC_IN_SHLIB
3079 for (i = top_id; i >= 0; --i)
3081 /* This will probably hit the same section many times.. */
3082 stub_sec = hplink->stub_group[i].reloc_sec;
3083 if (stub_sec != NULL)
3085 stub_sec->_raw_size = 0;
3086 stub_sec->_cooked_size = 0;
3092 bfd_hash_traverse (&hplink->stub_hash_table,
3096 /* Ask the linker to do its stuff. */
3097 (*hplink->layout_sections_again) ();
3103 error_ret_free_local:
3104 while (bfd_count-- > 0)
3105 if (all_local_syms[bfd_count])
3106 free (all_local_syms[bfd_count]);
3107 free (all_local_syms);
3112 /* For a final link, this function is called after we have sized the
3113 stubs to provide a value for __gp. */
3116 elf32_hppa_set_gp (abfd, info)
3118 struct bfd_link_info *info;
3120 struct elf32_hppa_link_hash_table *hplink;
3121 struct elf_link_hash_entry *h;
3125 hplink = hppa_link_hash_table (info);
3126 h = elf_link_hash_lookup (&hplink->root, "$global$",
3127 false, false, false);
3130 && (h->root.type == bfd_link_hash_defined
3131 || h->root.type == bfd_link_hash_defweak))
3133 gp_val = h->root.u.def.value;
3134 sec = h->root.u.def.section;
3138 /* Choose to point our LTP at, in this order, one of .plt, .got,
3139 or .data, if these sections exist. In the case of choosing
3140 .plt try to make the LTP ideal for addressing anywhere in the
3141 .plt or .got with a 14 bit signed offset. Typically, the end
3142 of the .plt is the start of the .got, so choose .plt + 0x2000
3143 if either the .plt or .got is larger than 0x2000. If both
3144 the .plt and .got are smaller than 0x2000, choose the end of
3145 the .plt section. */
3150 gp_val = sec->_raw_size;
3152 || (hplink->sgot && hplink->sgot->_raw_size > 0x2000))
3163 /* We know we don't have a .plt. If .got is large,
3165 if (sec->_raw_size > 0x2000)
3170 /* No .plt or .got. Who cares what the LTP is? */
3171 sec = bfd_get_section_by_name (abfd, ".data");
3177 h->root.type = bfd_link_hash_defined;
3178 h->root.u.def.value = gp_val;
3180 h->root.u.def.section = sec;
3182 h->root.u.def.section = bfd_abs_section_ptr;
3186 if (sec != NULL && sec->output_section != NULL)
3187 gp_val += sec->output_section->vma + sec->output_offset;
3189 elf_gp (abfd) = gp_val;
3193 /* Build all the stubs associated with the current output file. The
3194 stubs are kept in a hash table attached to the main linker hash
3195 table. We also set up the .plt entries for statically linked PIC
3196 functions here. This function is called via hppaelf_finish in the
3200 elf32_hppa_build_stubs (info)
3201 struct bfd_link_info *info;
3204 struct bfd_hash_table *table;
3205 struct elf32_hppa_link_hash_table *hplink;
3207 hplink = hppa_link_hash_table (info);
3209 for (stub_sec = hplink->stub_bfd->sections;
3211 stub_sec = stub_sec->next)
3215 /* Allocate memory to hold the linker stubs. */
3216 size = stub_sec->_raw_size;
3217 stub_sec->contents = (unsigned char *) bfd_zalloc (hplink->stub_bfd,
3219 if (stub_sec->contents == NULL && size != 0)
3221 stub_sec->_raw_size = 0;
3224 /* Build the stubs as directed by the stub hash table. */
3225 table = &hplink->stub_hash_table;
3226 bfd_hash_traverse (table, hppa_build_one_stub, info);
3231 /* Perform a final link. */
3234 elf32_hppa_final_link (abfd, info)
3236 struct bfd_link_info *info;
3240 /* Invoke the regular ELF linker to do all the work. */
3241 if (!bfd_elf32_bfd_final_link (abfd, info))
3244 /* If we're producing a final executable, sort the contents of the
3245 unwind section. Magic section names, but this is much safer than
3246 having elf32_hppa_relocate_section remember where SEGREL32 relocs
3247 occurred. Consider what happens if someone inept creates a
3248 linker script that puts unwind information in .text. */
3249 s = bfd_get_section_by_name (abfd, ".PARISC.unwind");
3255 size = s->_raw_size;
3256 contents = bfd_malloc (size);
3257 if (contents == NULL)
3260 if (! bfd_get_section_contents (abfd, s, contents, (file_ptr) 0, size))
3263 qsort (contents, (size_t) (size / 16), 16, hppa_unwind_entry_compare);
3265 if (! bfd_set_section_contents (abfd, s, contents, (file_ptr) 0, size))
3271 /* Record the lowest address for the data and text segments. */
3274 hppa_record_segment_addr (abfd, section, data)
3275 bfd *abfd ATTRIBUTE_UNUSED;
3279 struct elf32_hppa_link_hash_table *hplink;
3281 hplink = (struct elf32_hppa_link_hash_table *) data;
3283 if ((section->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
3285 bfd_vma value = section->vma - section->filepos;
3287 if ((section->flags & SEC_READONLY) != 0)
3289 if (value < hplink->text_segment_base)
3290 hplink->text_segment_base = value;
3294 if (value < hplink->data_segment_base)
3295 hplink->data_segment_base = value;
3300 /* Perform a relocation as part of a final link. */
3302 static bfd_reloc_status_type
3303 final_link_relocate (input_section, contents, rel, value, hplink, sym_sec, h)
3304 asection *input_section;
3306 const Elf_Internal_Rela *rel;
3308 struct elf32_hppa_link_hash_table *hplink;
3310 struct elf32_hppa_link_hash_entry *h;
3313 unsigned int r_type = ELF32_R_TYPE (rel->r_info);
3314 reloc_howto_type *howto = elf_hppa_howto_table + r_type;
3315 int r_format = howto->bitsize;
3316 enum hppa_reloc_field_selector_type_alt r_field;
3317 bfd *input_bfd = input_section->owner;
3318 bfd_vma offset = rel->r_offset;
3319 bfd_vma max_branch_offset = 0;
3320 bfd_byte *hit_data = contents + offset;
3321 bfd_signed_vma addend = rel->r_addend;
3323 struct elf32_hppa_stub_hash_entry *stub_entry = NULL;
3326 if (r_type == R_PARISC_NONE)
3327 return bfd_reloc_ok;
3329 insn = bfd_get_32 (input_bfd, hit_data);
3331 /* Find out where we are and where we're going. */
3332 location = (offset +
3333 input_section->output_offset +
3334 input_section->output_section->vma);
3338 case R_PARISC_PCREL12F:
3339 case R_PARISC_PCREL17F:
3340 case R_PARISC_PCREL22F:
3341 /* If this is a call to a function defined in another dynamic
3342 library, or if it is a call to a PIC function in the same
3343 object, or if this is a shared link and it is a call to a
3344 weak symbol which may or may not be in the same object, then
3345 find the import stub in the stub hash. */
3347 || sym_sec->output_section == NULL
3349 && ((h->maybe_pic_call
3350 && !(input_section->flags & SEC_HAS_GOT_REF))
3351 || (h->elf.root.type == bfd_link_hash_defweak
3352 && h->elf.dynindx != -1
3353 && h->elf.plt.offset != (bfd_vma) -1))))
3355 stub_entry = hppa_get_stub_entry (input_section, sym_sec,
3357 if (stub_entry != NULL)
3359 value = (stub_entry->stub_offset
3360 + stub_entry->stub_sec->output_offset
3361 + stub_entry->stub_sec->output_section->vma);
3364 else if (sym_sec == NULL && h != NULL
3365 && h->elf.root.type == bfd_link_hash_undefweak)
3367 /* It's OK if undefined weak. Calls to undefined weak
3368 symbols behave as if the "called" function
3369 immediately returns. We can thus call to a weak
3370 function without first checking whether the function
3376 return bfd_reloc_notsupported;
3380 case R_PARISC_PCREL21L:
3381 case R_PARISC_PCREL17C:
3382 case R_PARISC_PCREL17R:
3383 case R_PARISC_PCREL14R:
3384 case R_PARISC_PCREL14F:
3385 /* Make it a pc relative offset. */
3390 case R_PARISC_DPREL21L:
3391 case R_PARISC_DPREL14R:
3392 case R_PARISC_DPREL14F:
3393 /* For all the DP relative relocations, we need to examine the symbol's
3394 section. If it's a code section, then "data pointer relative" makes
3395 no sense. In that case we don't adjust the "value", and for 21 bit
3396 addil instructions, we change the source addend register from %dp to
3397 %r0. This situation commonly arises when a variable's "constness"
3398 is declared differently from the way the variable is defined. For
3399 instance: "extern int foo" with foo defined as "const int foo". */
3400 if (sym_sec == NULL)
3402 if ((sym_sec->flags & SEC_CODE) != 0)
3404 if ((insn & ((0x3f << 26) | (0x1f << 21)))
3405 == (((int) OP_ADDIL << 26) | (27 << 21)))
3407 insn &= ~ (0x1f << 21);
3408 #if 1 /* debug them. */
3409 (*_bfd_error_handler)
3410 (_("%s(%s+0x%lx): fixing %s"),
3411 bfd_get_filename (input_bfd),
3412 input_section->name,
3413 (long) rel->r_offset,
3417 /* Now try to make things easy for the dynamic linker. */
3423 case R_PARISC_DLTIND21L:
3424 case R_PARISC_DLTIND14R:
3425 case R_PARISC_DLTIND14F:
3426 value -= elf_gp (input_section->output_section->owner);
3429 case R_PARISC_SEGREL32:
3430 if ((sym_sec->flags & SEC_CODE) != 0)
3431 value -= hplink->text_segment_base;
3433 value -= hplink->data_segment_base;
3442 case R_PARISC_DIR32:
3443 case R_PARISC_DIR14F:
3444 case R_PARISC_DIR17F:
3445 case R_PARISC_PCREL17C:
3446 case R_PARISC_PCREL14F:
3447 case R_PARISC_DPREL14F:
3448 case R_PARISC_PLABEL32:
3449 case R_PARISC_DLTIND14F:
3450 case R_PARISC_SEGBASE:
3451 case R_PARISC_SEGREL32:
3455 case R_PARISC_DIR21L:
3456 case R_PARISC_PCREL21L:
3457 case R_PARISC_DPREL21L:
3458 case R_PARISC_PLABEL21L:
3459 case R_PARISC_DLTIND21L:
3463 case R_PARISC_DIR17R:
3464 case R_PARISC_PCREL17R:
3465 case R_PARISC_DIR14R:
3466 case R_PARISC_PCREL14R:
3467 case R_PARISC_DPREL14R:
3468 case R_PARISC_PLABEL14R:
3469 case R_PARISC_DLTIND14R:
3473 case R_PARISC_PCREL12F:
3474 case R_PARISC_PCREL17F:
3475 case R_PARISC_PCREL22F:
3478 if (r_type == (unsigned int) R_PARISC_PCREL17F)
3480 max_branch_offset = (1 << (17-1)) << 2;
3482 else if (r_type == (unsigned int) R_PARISC_PCREL12F)
3484 max_branch_offset = (1 << (12-1)) << 2;
3488 max_branch_offset = (1 << (22-1)) << 2;
3491 /* sym_sec is NULL on undefined weak syms or when shared on
3492 undefined syms. We've already checked for a stub for the
3493 shared undefined case. */
3494 if (sym_sec == NULL)
3497 /* If the branch is out of reach, then redirect the
3498 call to the local stub for this function. */
3499 if (value + addend + max_branch_offset >= 2*max_branch_offset)
3501 stub_entry = hppa_get_stub_entry (input_section, sym_sec,
3503 if (stub_entry == NULL)
3504 return bfd_reloc_notsupported;
3506 /* Munge up the value and addend so that we call the stub
3507 rather than the procedure directly. */
3508 value = (stub_entry->stub_offset
3509 + stub_entry->stub_sec->output_offset
3510 + stub_entry->stub_sec->output_section->vma
3516 /* Something we don't know how to handle. */
3518 return bfd_reloc_notsupported;
3521 /* Make sure we can reach the stub. */
3522 if (max_branch_offset != 0
3523 && value + addend + max_branch_offset >= 2*max_branch_offset)
3525 (*_bfd_error_handler)
3526 (_("%s(%s+0x%lx): cannot reach %s, recompile with -ffunction-sections"),
3527 bfd_get_filename (input_bfd),
3528 input_section->name,
3529 (long) rel->r_offset,
3530 stub_entry->root.string);
3531 return bfd_reloc_notsupported;
3534 val = hppa_field_adjust (value, addend, r_field);
3538 case R_PARISC_PCREL12F:
3539 case R_PARISC_PCREL17C:
3540 case R_PARISC_PCREL17F:
3541 case R_PARISC_PCREL17R:
3542 case R_PARISC_PCREL22F:
3543 case R_PARISC_DIR17F:
3544 case R_PARISC_DIR17R:
3545 /* This is a branch. Divide the offset by four.
3546 Note that we need to decide whether it's a branch or
3547 otherwise by inspecting the reloc. Inspecting insn won't
3548 work as insn might be from a .word directive. */
3556 insn = hppa_rebuild_insn (insn, val, r_format);
3558 /* Update the instruction word. */
3559 bfd_put_32 (input_bfd, (bfd_vma) insn, hit_data);
3560 return bfd_reloc_ok;
3563 /* Relocate an HPPA ELF section. */
3566 elf32_hppa_relocate_section (output_bfd, info, input_bfd, input_section,
3567 contents, relocs, local_syms, local_sections)
3569 struct bfd_link_info *info;
3571 asection *input_section;
3573 Elf_Internal_Rela *relocs;
3574 Elf_Internal_Sym *local_syms;
3575 asection **local_sections;
3578 bfd_vma *local_got_offsets;
3579 struct elf32_hppa_link_hash_table *hplink;
3580 Elf_Internal_Shdr *symtab_hdr;
3581 Elf_Internal_Rela *rel;
3582 Elf_Internal_Rela *relend;
3585 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3587 hplink = hppa_link_hash_table (info);
3588 dynobj = hplink->root.dynobj;
3589 local_got_offsets = elf_local_got_offsets (input_bfd);
3593 relend = relocs + input_section->reloc_count;
3594 for (; rel < relend; rel++)
3596 unsigned int r_type;
3597 reloc_howto_type *howto;
3598 unsigned int r_symndx;
3599 struct elf32_hppa_link_hash_entry *h;
3600 Elf_Internal_Sym *sym;
3603 bfd_reloc_status_type r;
3604 const char *sym_name;
3608 r_type = ELF32_R_TYPE (rel->r_info);
3609 if (r_type >= (unsigned int) R_PARISC_UNIMPLEMENTED)
3611 bfd_set_error (bfd_error_bad_value);
3614 if (r_type == (unsigned int) R_PARISC_GNU_VTENTRY
3615 || r_type == (unsigned int) R_PARISC_GNU_VTINHERIT)
3618 r_symndx = ELF32_R_SYM (rel->r_info);
3620 if (info->relocateable)
3622 /* This is a relocateable link. We don't have to change
3623 anything, unless the reloc is against a section symbol,
3624 in which case we have to adjust according to where the
3625 section symbol winds up in the output section. */
3626 if (r_symndx < symtab_hdr->sh_info)
3628 sym = local_syms + r_symndx;
3629 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
3631 sym_sec = local_sections[r_symndx];
3632 rel->r_addend += sym_sec->output_offset;
3638 /* This is a final link. */
3642 if (r_symndx < symtab_hdr->sh_info)
3644 /* This is a local symbol, h defaults to NULL. */
3645 sym = local_syms + r_symndx;
3646 sym_sec = local_sections[r_symndx];
3647 relocation = ((ELF_ST_TYPE (sym->st_info) == STT_SECTION
3648 ? 0 : sym->st_value)
3649 + sym_sec->output_offset
3650 + sym_sec->output_section->vma);
3656 /* It's a global; Find its entry in the link hash. */
3657 indx = r_symndx - symtab_hdr->sh_info;
3658 h = ((struct elf32_hppa_link_hash_entry *)
3659 elf_sym_hashes (input_bfd)[indx]);
3660 while (h->elf.root.type == bfd_link_hash_indirect
3661 || h->elf.root.type == bfd_link_hash_warning)
3662 h = (struct elf32_hppa_link_hash_entry *) h->elf.root.u.i.link;
3665 if (h->elf.root.type == bfd_link_hash_defined
3666 || h->elf.root.type == bfd_link_hash_defweak)
3668 sym_sec = h->elf.root.u.def.section;
3669 /* If sym_sec->output_section is NULL, then it's a
3670 symbol defined in a shared library. */
3671 if (sym_sec->output_section != NULL)
3672 relocation = (h->elf.root.u.def.value
3673 + sym_sec->output_offset
3674 + sym_sec->output_section->vma);
3676 else if (h->elf.root.type == bfd_link_hash_undefweak)
3678 else if (info->shared && !info->no_undefined
3679 && ELF_ST_VISIBILITY (h->elf.other) == STV_DEFAULT
3680 && h->elf.type != STT_PARISC_MILLI)
3683 if (!((*info->callbacks->undefined_symbol)
3684 (info, h->elf.root.root.string, input_bfd,
3685 input_section, rel->r_offset, false)))
3690 if (!((*info->callbacks->undefined_symbol)
3691 (info, h->elf.root.root.string, input_bfd,
3692 input_section, rel->r_offset, true)))
3697 /* Do any required modifications to the relocation value, and
3698 determine what types of dynamic info we need to output, if
3703 case R_PARISC_DLTIND14F:
3704 case R_PARISC_DLTIND14R:
3705 case R_PARISC_DLTIND21L:
3706 /* Relocation is to the entry for this symbol in the global
3712 off = h->elf.got.offset;
3713 dyn = hplink->root.dynamic_sections_created;
3714 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, &h->elf))
3716 /* This is actually a static link, or it is a
3717 -Bsymbolic link and the symbol is defined
3718 locally, or the symbol was forced to be local
3719 because of a version file. We must initialize
3720 this entry in the global offset table. Since the
3721 offset must always be a multiple of 4, we use the
3722 least significant bit to record whether we have
3723 initialized it already.
3725 When doing a dynamic link, we create a .rela.got
3726 relocation entry to initialize the value. This
3727 is done in the finish_dynamic_symbol routine. */
3732 bfd_put_32 (output_bfd, relocation,
3733 hplink->sgot->contents + off);
3734 h->elf.got.offset |= 1;
3740 /* Local symbol case. */
3741 if (local_got_offsets == NULL)
3744 off = local_got_offsets[r_symndx];
3746 /* The offset must always be a multiple of 4. We use
3747 the least significant bit to record whether we have
3748 already generated the necessary reloc. */
3753 bfd_put_32 (output_bfd, relocation,
3754 hplink->sgot->contents + off);
3758 /* Output a dynamic relocation for this GOT
3759 entry. In this case it is relative to the
3760 base of the object because the symbol index
3762 Elf_Internal_Rela outrel;
3763 asection *srelgot = hplink->srelgot;
3765 outrel.r_offset = (off
3766 + hplink->sgot->output_offset
3767 + hplink->sgot->output_section->vma);
3768 outrel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
3769 outrel.r_addend = relocation;
3770 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
3771 ((Elf32_External_Rela *)
3773 + srelgot->reloc_count));
3774 ++srelgot->reloc_count;
3777 local_got_offsets[r_symndx] |= 1;
3781 if (off >= (bfd_vma) -2)
3784 /* Add the base of the GOT to the relocation value. */
3786 + hplink->sgot->output_offset
3787 + hplink->sgot->output_section->vma);
3790 case R_PARISC_SEGREL32:
3791 /* If this is the first SEGREL relocation, then initialize
3792 the segment base values. */
3793 if (hplink->text_segment_base == (bfd_vma) -1)
3794 bfd_map_over_sections (output_bfd,
3795 hppa_record_segment_addr,
3799 case R_PARISC_PLABEL14R:
3800 case R_PARISC_PLABEL21L:
3801 case R_PARISC_PLABEL32:
3802 if (hplink->root.dynamic_sections_created)
3804 /* If we have a global symbol with a PLT slot, then
3805 redirect this relocation to it. */
3808 off = h->elf.plt.offset;
3809 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, &h->elf))
3811 /* In a non-shared link, adjust_dynamic_symbols
3812 isn't called for symbols forced local. We
3813 need to write out the plt entry here. */
3818 bfd_put_32 (output_bfd,
3820 hplink->splt->contents + off);
3821 bfd_put_32 (output_bfd,
3822 elf_gp (hplink->splt->output_section->owner),
3823 hplink->splt->contents + off + 4);
3824 h->elf.plt.offset |= 1;
3830 bfd_vma *local_plt_offsets;
3832 if (local_got_offsets == NULL)
3835 local_plt_offsets = local_got_offsets + symtab_hdr->sh_info;
3836 off = local_plt_offsets[r_symndx];
3838 /* As for the local .got entry case, we use the last
3839 bit to record whether we've already initialised
3840 this local .plt entry. */
3845 bfd_put_32 (output_bfd,
3847 hplink->splt->contents + off);
3848 bfd_put_32 (output_bfd,
3849 elf_gp (hplink->splt->output_section->owner),
3850 hplink->splt->contents + off + 4);
3854 /* Output a dynamic IPLT relocation for this
3856 Elf_Internal_Rela outrel;
3857 asection *srelplt = hplink->srelplt;
3859 outrel.r_offset = (off
3860 + hplink->splt->output_offset
3861 + hplink->splt->output_section->vma);
3862 outrel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
3863 outrel.r_addend = relocation;
3864 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
3865 ((Elf32_External_Rela *)
3867 + srelplt->reloc_count));
3868 ++srelplt->reloc_count;
3871 local_plt_offsets[r_symndx] |= 1;
3875 if (off >= (bfd_vma) -2)
3878 /* PLABELs contain function pointers. Relocation is to
3879 the entry for the function in the .plt. The magic +2
3880 offset signals to $$dyncall that the function pointer
3881 is in the .plt and thus has a gp pointer too.
3882 Exception: Undefined PLABELs should have a value of
3885 || (h->elf.root.type != bfd_link_hash_undefweak
3886 && h->elf.root.type != bfd_link_hash_undefined))
3889 + hplink->splt->output_offset
3890 + hplink->splt->output_section->vma
3895 /* Fall through and possibly emit a dynamic relocation. */
3897 case R_PARISC_DIR17F:
3898 case R_PARISC_DIR17R:
3899 case R_PARISC_DIR14F:
3900 case R_PARISC_DIR14R:
3901 case R_PARISC_DIR21L:
3902 case R_PARISC_DPREL14F:
3903 case R_PARISC_DPREL14R:
3904 case R_PARISC_DPREL21L:
3905 case R_PARISC_DIR32:
3906 /* The reloc types handled here and this conditional
3907 expression must match the code in ..check_relocs and
3908 ..discard_relocs. ie. We need exactly the same condition
3909 as in ..check_relocs, with some extra conditions (dynindx
3910 test in this case) to cater for relocs removed by
3911 ..discard_relocs. If you squint, the non-shared test
3912 here does indeed match the one in ..check_relocs, the
3913 difference being that here we test DEF_DYNAMIC as well as
3914 !DEF_REGULAR. All common syms end up with !DEF_REGULAR,
3915 which is why we can't use just that test here.
3916 Conversely, DEF_DYNAMIC can't be used in check_relocs as
3917 there all files have not been loaded. */
3919 && (input_section->flags & SEC_ALLOC) != 0
3920 && (IS_ABSOLUTE_RELOC (r_type)
3922 && h->elf.dynindx != -1
3924 || (h->elf.elf_link_hash_flags
3925 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
3927 && (input_section->flags & SEC_ALLOC) != 0
3929 && h->elf.dynindx != -1
3930 && (h->elf.elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
3931 && (((h->elf.elf_link_hash_flags
3932 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
3933 && (h->elf.elf_link_hash_flags
3934 & ELF_LINK_HASH_DEF_REGULAR) == 0)
3935 || h->elf.root.type == bfd_link_hash_undefweak
3936 || h->elf.root.type == bfd_link_hash_undefined)))
3938 Elf_Internal_Rela outrel;
3941 /* When generating a shared object, these relocations
3942 are copied into the output file to be resolved at run
3949 name = (bfd_elf_string_from_elf_section
3951 elf_elfheader (input_bfd)->e_shstrndx,
3952 elf_section_data (input_section)->rel_hdr.sh_name));
3955 sreloc = bfd_get_section_by_name (dynobj, name);
3960 outrel.r_offset = rel->r_offset;
3961 outrel.r_addend = rel->r_addend;
3963 if (elf_section_data (input_section)->stab_info != NULL)
3965 off = (_bfd_stab_section_offset
3966 (output_bfd, &hplink->root.stab_info,
3968 &elf_section_data (input_section)->stab_info,
3970 if (off == (bfd_vma) -1)
3972 outrel.r_offset = off;
3975 outrel.r_offset += (input_section->output_offset
3976 + input_section->output_section->vma);
3980 memset (&outrel, 0, sizeof (outrel));
3983 && h->elf.dynindx != -1
3985 || !IS_ABSOLUTE_RELOC (r_type)
3988 || (h->elf.elf_link_hash_flags
3989 & ELF_LINK_HASH_DEF_REGULAR) == 0))
3991 outrel.r_info = ELF32_R_INFO (h->elf.dynindx, r_type);
3993 else /* It's a local symbol, or one marked to become local. */
3997 /* Add the absolute offset of the symbol. */
3998 outrel.r_addend += relocation;
4000 /* Global plabels need to be processed by the
4001 dynamic linker so that functions have at most one
4002 fptr. For this reason, we need to differentiate
4003 between global and local plabels, which we do by
4004 providing the function symbol for a global plabel
4005 reloc, and no symbol for local plabels. */
4008 && sym_sec->output_section != NULL
4009 && ! bfd_is_abs_section (sym_sec))
4011 indx = elf_section_data (sym_sec->output_section)->dynindx;
4012 /* We are turning this relocation into one
4013 against a section symbol, so subtract out the
4014 output section's address but not the offset
4015 of the input section in the output section. */
4016 outrel.r_addend -= sym_sec->output_section->vma;
4019 outrel.r_info = ELF32_R_INFO (indx, r_type);
4022 /* EH info can cause unaligned DIR32 relocs.
4023 Tweak the reloc type for the dynamic linker. */
4024 if (r_type == R_PARISC_DIR32 && (outrel.r_offset & 3) != 0)
4025 outrel.r_info = ELF32_R_INFO (ELF32_R_SYM (outrel.r_info),
4028 bfd_elf32_swap_reloca_out (output_bfd, &outrel,
4029 ((Elf32_External_Rela *)
4031 + sreloc->reloc_count));
4032 ++sreloc->reloc_count;
4040 r = final_link_relocate (input_section, contents, rel, relocation,
4041 hplink, sym_sec, h);
4043 if (r == bfd_reloc_ok)
4047 sym_name = h->elf.root.root.string;
4050 sym_name = bfd_elf_string_from_elf_section (input_bfd,
4051 symtab_hdr->sh_link,
4053 if (sym_name == NULL)
4055 if (*sym_name == '\0')
4056 sym_name = bfd_section_name (input_bfd, sym_sec);
4059 howto = elf_hppa_howto_table + r_type;
4061 if (r == bfd_reloc_undefined || r == bfd_reloc_notsupported)
4063 (*_bfd_error_handler)
4064 (_("%s(%s+0x%lx): cannot handle %s for %s"),
4065 bfd_get_filename (input_bfd),
4066 input_section->name,
4067 (long) rel->r_offset,
4073 if (!((*info->callbacks->reloc_overflow)
4074 (info, sym_name, howto->name, (bfd_vma) 0,
4075 input_bfd, input_section, rel->r_offset)))
4083 /* Comparison function for qsort to sort unwind section during a
4087 hppa_unwind_entry_compare (a, b)
4091 const bfd_byte *ap, *bp;
4092 unsigned long av, bv;
4094 ap = (const bfd_byte *) a;
4095 av = (unsigned long) ap[0] << 24;
4096 av |= (unsigned long) ap[1] << 16;
4097 av |= (unsigned long) ap[2] << 8;
4098 av |= (unsigned long) ap[3];
4100 bp = (const bfd_byte *) b;
4101 bv = (unsigned long) bp[0] << 24;
4102 bv |= (unsigned long) bp[1] << 16;
4103 bv |= (unsigned long) bp[2] << 8;
4104 bv |= (unsigned long) bp[3];
4106 return av < bv ? -1 : av > bv ? 1 : 0;
4109 /* Finish up dynamic symbol handling. We set the contents of various
4110 dynamic sections here. */
4113 elf32_hppa_finish_dynamic_symbol (output_bfd, info, h, sym)
4115 struct bfd_link_info *info;
4116 struct elf_link_hash_entry *h;
4117 Elf_Internal_Sym *sym;
4119 struct elf32_hppa_link_hash_table *hplink;
4122 hplink = hppa_link_hash_table (info);
4123 dynobj = hplink->root.dynobj;
4125 if (h->plt.offset != (bfd_vma) -1)
4129 if (h->plt.offset & 1)
4132 /* This symbol has an entry in the procedure linkage table. Set
4135 The format of a plt entry is
4140 if (h->root.type == bfd_link_hash_defined
4141 || h->root.type == bfd_link_hash_defweak)
4143 value = h->root.u.def.value;
4144 if (h->root.u.def.section->output_section != NULL)
4145 value += (h->root.u.def.section->output_offset
4146 + h->root.u.def.section->output_section->vma);
4149 if (! ((struct elf32_hppa_link_hash_entry *) h)->pic_call)
4151 Elf_Internal_Rela rel;
4153 /* Create a dynamic IPLT relocation for this entry. */
4154 rel.r_offset = (h->plt.offset
4155 + hplink->splt->output_offset
4156 + hplink->splt->output_section->vma);
4157 if (! ((struct elf32_hppa_link_hash_entry *) h)->plt_abs
4158 && h->dynindx != -1)
4160 /* To support lazy linking, the function pointer is
4161 initialised to point to a special stub stored at the
4162 end of the .plt. This is not done for plt entries
4163 with a base-relative dynamic relocation. */
4164 value = (hplink->splt->output_offset
4165 + hplink->splt->output_section->vma
4166 + hplink->splt->_raw_size
4169 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_IPLT);
4174 /* This symbol has been marked to become local, and is
4175 used by a plabel so must be kept in the .plt. */
4176 rel.r_info = ELF32_R_INFO (0, R_PARISC_IPLT);
4177 rel.r_addend = value;
4180 bfd_elf32_swap_reloca_out (hplink->splt->output_section->owner,
4182 ((Elf32_External_Rela *)
4183 hplink->srelplt->contents
4184 + hplink->srelplt->reloc_count));
4185 hplink->srelplt->reloc_count++;
4188 bfd_put_32 (hplink->splt->owner,
4190 hplink->splt->contents + h->plt.offset);
4191 bfd_put_32 (hplink->splt->owner,
4192 elf_gp (hplink->splt->output_section->owner),
4193 hplink->splt->contents + h->plt.offset + 4);
4194 if (PLABEL_PLT_ENTRY_SIZE != PLT_ENTRY_SIZE
4195 && ((struct elf32_hppa_link_hash_entry *) h)->plabel
4196 && h->dynindx != -1)
4198 memset (hplink->splt->contents + h->plt.offset + 8,
4199 0, PLABEL_PLT_ENTRY_SIZE - PLT_ENTRY_SIZE);
4202 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
4204 /* Mark the symbol as undefined, rather than as defined in
4205 the .plt section. Leave the value alone. */
4206 sym->st_shndx = SHN_UNDEF;
4210 if (h->got.offset != (bfd_vma) -1)
4212 Elf_Internal_Rela rel;
4214 /* This symbol has an entry in the global offset table. Set it
4217 rel.r_offset = ((h->got.offset &~ (bfd_vma) 1)
4218 + hplink->sgot->output_offset
4219 + hplink->sgot->output_section->vma);
4221 /* If this is a -Bsymbolic link and the symbol is defined
4222 locally or was forced to be local because of a version file,
4223 we just want to emit a RELATIVE reloc. The entry in the
4224 global offset table will already have been initialized in the
4225 relocate_section function. */
4227 && (info->symbolic || h->dynindx == -1)
4228 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
4230 rel.r_info = ELF32_R_INFO (0, R_PARISC_DIR32);
4231 rel.r_addend = (h->root.u.def.value
4232 + h->root.u.def.section->output_offset
4233 + h->root.u.def.section->output_section->vma);
4237 if ((h->got.offset & 1) != 0)
4239 bfd_put_32 (output_bfd, (bfd_vma) 0,
4240 hplink->sgot->contents + h->got.offset);
4241 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_DIR32);
4245 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4246 ((Elf32_External_Rela *)
4247 hplink->srelgot->contents
4248 + hplink->srelgot->reloc_count));
4249 ++hplink->srelgot->reloc_count;
4252 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
4255 Elf_Internal_Rela rel;
4257 /* This symbol needs a copy reloc. Set it up. */
4259 if (! (h->dynindx != -1
4260 && (h->root.type == bfd_link_hash_defined
4261 || h->root.type == bfd_link_hash_defweak)))
4264 s = hplink->srelbss;
4266 rel.r_offset = (h->root.u.def.value
4267 + h->root.u.def.section->output_offset
4268 + h->root.u.def.section->output_section->vma);
4270 rel.r_info = ELF32_R_INFO (h->dynindx, R_PARISC_COPY);
4271 bfd_elf32_swap_reloca_out (output_bfd, &rel,
4272 ((Elf32_External_Rela *) s->contents
4277 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
4278 if (h->root.root.string[0] == '_'
4279 && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4280 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0))
4282 sym->st_shndx = SHN_ABS;
4288 /* Finish up the dynamic sections. */
4291 elf32_hppa_finish_dynamic_sections (output_bfd, info)
4293 struct bfd_link_info *info;
4296 struct elf32_hppa_link_hash_table *hplink;
4299 hplink = hppa_link_hash_table (info);
4300 dynobj = hplink->root.dynobj;
4302 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4304 if (hplink->root.dynamic_sections_created)
4306 Elf32_External_Dyn *dyncon, *dynconend;
4311 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4312 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
4313 for (; dyncon < dynconend; dyncon++)
4315 Elf_Internal_Dyn dyn;
4318 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4326 /* Use PLTGOT to set the GOT register. */
4327 dyn.d_un.d_ptr = elf_gp (output_bfd);
4328 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4332 s = hplink->srelplt;
4333 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4334 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4338 s = hplink->srelplt;
4339 if (s->_cooked_size != 0)
4340 dyn.d_un.d_val = s->_cooked_size;
4342 dyn.d_un.d_val = s->_raw_size;
4343 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4349 if (hplink->sgot != NULL && hplink->sgot->_raw_size != 0)
4351 /* Fill in the first entry in the global offset table.
4352 We use it to point to our dynamic section, if we have one. */
4353 bfd_put_32 (output_bfd,
4355 ? sdyn->output_section->vma + sdyn->output_offset
4357 hplink->sgot->contents);
4359 /* The second entry is reserved for use by the dynamic linker. */
4360 memset (hplink->sgot->contents + GOT_ENTRY_SIZE, 0, GOT_ENTRY_SIZE);
4362 /* Set .got entry size. */
4363 elf_section_data (hplink->sgot->output_section)
4364 ->this_hdr.sh_entsize = GOT_ENTRY_SIZE;
4367 if (hplink->splt != NULL && hplink->splt->_raw_size != 0)
4369 /* Set plt entry size. */
4370 elf_section_data (hplink->splt->output_section)
4371 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
4373 if (hplink->need_plt_stub)
4375 /* Set up the .plt stub. */
4376 memcpy (hplink->splt->contents
4377 + hplink->splt->_raw_size - sizeof (plt_stub),
4378 plt_stub, sizeof (plt_stub));
4380 if ((hplink->splt->output_offset
4381 + hplink->splt->output_section->vma
4382 + hplink->splt->_raw_size)
4383 != (hplink->sgot->output_offset
4384 + hplink->sgot->output_section->vma))
4386 (*_bfd_error_handler)
4387 (_(".got section not immediately after .plt section"));
4396 /* Tweak the OSABI field of the elf header. */
4399 elf32_hppa_post_process_headers (abfd, link_info)
4401 struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
4403 Elf_Internal_Ehdr * i_ehdrp;
4405 i_ehdrp = elf_elfheader (abfd);
4407 if (strcmp (bfd_get_target (abfd), "elf32-hppa-linux") == 0)
4409 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_LINUX;
4413 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_HPUX;
4417 /* Called when writing out an object file to decide the type of a
4420 elf32_hppa_elf_get_symbol_type (elf_sym, type)
4421 Elf_Internal_Sym *elf_sym;
4424 if (ELF_ST_TYPE (elf_sym->st_info) == STT_PARISC_MILLI)
4425 return STT_PARISC_MILLI;
4430 /* Misc BFD support code. */
4431 #define bfd_elf32_bfd_is_local_label_name elf_hppa_is_local_label_name
4432 #define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
4433 #define elf_info_to_howto elf_hppa_info_to_howto
4434 #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel
4436 /* Stuff for the BFD linker. */
4437 #define bfd_elf32_bfd_final_link elf32_hppa_final_link
4438 #define bfd_elf32_bfd_link_hash_table_create elf32_hppa_link_hash_table_create
4439 #define elf_backend_add_symbol_hook elf32_hppa_add_symbol_hook
4440 #define elf_backend_adjust_dynamic_symbol elf32_hppa_adjust_dynamic_symbol
4441 #define elf_backend_check_relocs elf32_hppa_check_relocs
4442 #define elf_backend_create_dynamic_sections elf32_hppa_create_dynamic_sections
4443 #define elf_backend_fake_sections elf_hppa_fake_sections
4444 #define elf_backend_relocate_section elf32_hppa_relocate_section
4445 #define elf_backend_hide_symbol elf32_hppa_hide_symbol
4446 #define elf_backend_finish_dynamic_symbol elf32_hppa_finish_dynamic_symbol
4447 #define elf_backend_finish_dynamic_sections elf32_hppa_finish_dynamic_sections
4448 #define elf_backend_size_dynamic_sections elf32_hppa_size_dynamic_sections
4449 #define elf_backend_gc_mark_hook elf32_hppa_gc_mark_hook
4450 #define elf_backend_gc_sweep_hook elf32_hppa_gc_sweep_hook
4451 #define elf_backend_object_p elf32_hppa_object_p
4452 #define elf_backend_final_write_processing elf_hppa_final_write_processing
4453 #define elf_backend_post_process_headers elf32_hppa_post_process_headers
4454 #define elf_backend_get_symbol_type elf32_hppa_elf_get_symbol_type
4456 #define elf_backend_can_gc_sections 1
4457 #define elf_backend_plt_alignment 2
4458 #define elf_backend_want_got_plt 0
4459 #define elf_backend_plt_readonly 0
4460 #define elf_backend_want_plt_sym 0
4461 #define elf_backend_got_header_size 8
4463 #define TARGET_BIG_SYM bfd_elf32_hppa_vec
4464 #define TARGET_BIG_NAME "elf32-hppa"
4465 #define ELF_ARCH bfd_arch_hppa
4466 #define ELF_MACHINE_CODE EM_PARISC
4467 #define ELF_MAXPAGESIZE 0x1000
4469 #include "elf32-target.h"
4471 #undef TARGET_BIG_SYM
4472 #define TARGET_BIG_SYM bfd_elf32_hppa_linux_vec
4473 #undef TARGET_BIG_NAME
4474 #define TARGET_BIG_NAME "elf32-hppa-linux"
4476 #define INCLUDED_TARGET_FILE 1
4477 #include "elf32-target.h"