1 /* Support for HPPA 64-bit ELF
2 Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 #include "alloca-conf.h"
27 #include "elf64-hppa.h"
30 #define PLT_ENTRY_SIZE 0x10
31 #define DLT_ENTRY_SIZE 0x8
32 #define OPD_ENTRY_SIZE 0x20
34 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/pa20_64/dld.sl"
36 /* The stub is supposed to load the target address and target's DP
37 value out of the PLT, then do an external branch to the target
42 LDD PLTOFF+8(%r27),%r27
44 Note that we must use the LDD with a 14 bit displacement, not the one
45 with a 5 bit displacement. */
46 static char plt_stub
[] = {0x53, 0x61, 0x00, 0x00, 0xe8, 0x20, 0xd0, 0x00,
47 0x53, 0x7b, 0x00, 0x00 };
49 struct elf64_hppa_dyn_hash_entry
51 struct bfd_hash_entry root
;
53 /* Offsets for this symbol in various linker sections. */
59 /* The symbol table entry, if any, that this was derived from. */
60 struct elf_link_hash_entry
*h
;
62 /* The index of the (possibly local) symbol in the input bfd and its
63 associated BFD. Needed so that we can have relocs against local
64 symbols in shared libraries. */
68 /* Dynamic symbols may need to have two different values. One for
69 the dynamic symbol table, one for the normal symbol table.
71 In such cases we store the symbol's real value and section
72 index here so we can restore the real value before we write
73 the normal symbol table. */
77 /* Used to count non-got, non-plt relocations for delayed sizing
78 of relocation sections. */
79 struct elf64_hppa_dyn_reloc_entry
81 /* Next relocation in the chain. */
82 struct elf64_hppa_dyn_reloc_entry
*next
;
84 /* The type of the relocation. */
87 /* The input section of the relocation. */
90 /* The index of the section symbol for the input section of
91 the relocation. Only needed when building shared libraries. */
94 /* The offset within the input section of the relocation. */
97 /* The addend for the relocation. */
102 /* Nonzero if this symbol needs an entry in one of the linker
110 struct elf64_hppa_dyn_hash_table
112 struct bfd_hash_table root
;
115 struct elf64_hppa_link_hash_table
117 struct elf_link_hash_table root
;
119 /* Shortcuts to get to the various linker defined sections. */
121 asection
*dlt_rel_sec
;
123 asection
*plt_rel_sec
;
125 asection
*opd_rel_sec
;
126 asection
*other_rel_sec
;
128 /* Offset of __gp within .plt section. When the PLT gets large we want
129 to slide __gp into the PLT section so that we can continue to use
130 single DP relative instructions to load values out of the PLT. */
133 /* Note this is not strictly correct. We should create a stub section for
134 each input section with calls. The stub section should be placed before
135 the section with the call. */
138 bfd_vma text_segment_base
;
139 bfd_vma data_segment_base
;
141 struct elf64_hppa_dyn_hash_table dyn_hash_table
;
143 /* We build tables to map from an input section back to its
144 symbol index. This is the BFD for which we currently have
146 bfd
*section_syms_bfd
;
148 /* Array of symbol numbers for each input section attached to the
153 #define elf64_hppa_hash_table(p) \
154 ((struct elf64_hppa_link_hash_table *) ((p)->hash))
156 typedef struct bfd_hash_entry
*(*new_hash_entry_func
)
157 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
159 static boolean elf64_hppa_dyn_hash_table_init
160 PARAMS ((struct elf64_hppa_dyn_hash_table
*ht
, bfd
*abfd
,
161 new_hash_entry_func
new));
162 static struct bfd_hash_entry
*elf64_hppa_new_dyn_hash_entry
163 PARAMS ((struct bfd_hash_entry
*entry
, struct bfd_hash_table
*table
,
164 const char *string
));
165 static struct bfd_link_hash_table
*elf64_hppa_hash_table_create
166 PARAMS ((bfd
*abfd
));
167 static struct elf64_hppa_dyn_hash_entry
*elf64_hppa_dyn_hash_lookup
168 PARAMS ((struct elf64_hppa_dyn_hash_table
*table
, const char *string
,
169 boolean create
, boolean copy
));
170 static void elf64_hppa_dyn_hash_traverse
171 PARAMS ((struct elf64_hppa_dyn_hash_table
*table
,
172 boolean (*func
) (struct elf64_hppa_dyn_hash_entry
*, PTR
),
175 static const char *get_dyn_name
176 PARAMS ((asection
*, struct elf_link_hash_entry
*,
177 const Elf_Internal_Rela
*, char **, size_t *));
179 /* This must follow the definitions of the various derived linker
180 hash tables and shared functions. */
181 #include "elf-hppa.h"
183 static boolean elf64_hppa_object_p
186 static boolean elf64_hppa_section_from_shdr
187 PARAMS ((bfd
*, Elf64_Internal_Shdr
*, const char *));
189 static void elf64_hppa_post_process_headers
190 PARAMS ((bfd
*, struct bfd_link_info
*));
192 static boolean elf64_hppa_create_dynamic_sections
193 PARAMS ((bfd
*, struct bfd_link_info
*));
195 static boolean elf64_hppa_adjust_dynamic_symbol
196 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*));
198 static boolean elf64_hppa_mark_milli_and_exported_functions
199 PARAMS ((struct elf_link_hash_entry
*, PTR
));
201 static boolean elf64_hppa_size_dynamic_sections
202 PARAMS ((bfd
*, struct bfd_link_info
*));
204 static boolean elf64_hppa_link_output_symbol_hook
205 PARAMS ((bfd
*abfd
, struct bfd_link_info
*, const char *,
206 Elf_Internal_Sym
*, asection
*input_sec
));
208 static boolean elf64_hppa_finish_dynamic_symbol
209 PARAMS ((bfd
*, struct bfd_link_info
*,
210 struct elf_link_hash_entry
*, Elf_Internal_Sym
*));
212 static int elf64_hppa_additional_program_headers
PARAMS ((bfd
*));
214 static boolean elf64_hppa_modify_segment_map
PARAMS ((bfd
*));
216 static boolean elf64_hppa_finish_dynamic_sections
217 PARAMS ((bfd
*, struct bfd_link_info
*));
219 static boolean elf64_hppa_check_relocs
220 PARAMS ((bfd
*, struct bfd_link_info
*,
221 asection
*, const Elf_Internal_Rela
*));
223 static boolean elf64_hppa_dynamic_symbol_p
224 PARAMS ((struct elf_link_hash_entry
*, struct bfd_link_info
*));
226 static boolean elf64_hppa_mark_exported_functions
227 PARAMS ((struct elf_link_hash_entry
*, PTR
));
229 static boolean elf64_hppa_finalize_opd
230 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
232 static boolean elf64_hppa_finalize_dlt
233 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
235 static boolean allocate_global_data_dlt
236 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
238 static boolean allocate_global_data_plt
239 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
241 static boolean allocate_global_data_stub
242 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
244 static boolean allocate_global_data_opd
245 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
247 static boolean get_reloc_section
248 PARAMS ((bfd
*, struct elf64_hppa_link_hash_table
*, asection
*));
250 static boolean count_dyn_reloc
251 PARAMS ((bfd
*, struct elf64_hppa_dyn_hash_entry
*,
252 int, asection
*, int, bfd_vma
, bfd_vma
));
254 static boolean allocate_dynrel_entries
255 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
257 static boolean elf64_hppa_finalize_dynreloc
258 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
260 static boolean get_opd
261 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf64_hppa_link_hash_table
*));
263 static boolean get_plt
264 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf64_hppa_link_hash_table
*));
266 static boolean get_dlt
267 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf64_hppa_link_hash_table
*));
269 static boolean get_stub
270 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf64_hppa_link_hash_table
*));
272 static int elf64_hppa_elf_get_symbol_type
273 PARAMS ((Elf_Internal_Sym
*, int));
276 elf64_hppa_dyn_hash_table_init (ht
, abfd
, new)
277 struct elf64_hppa_dyn_hash_table
*ht
;
278 bfd
*abfd ATTRIBUTE_UNUSED
;
279 new_hash_entry_func
new;
281 memset (ht
, 0, sizeof (*ht
));
282 return bfd_hash_table_init (&ht
->root
, new);
285 static struct bfd_hash_entry
*
286 elf64_hppa_new_dyn_hash_entry (entry
, table
, string
)
287 struct bfd_hash_entry
*entry
;
288 struct bfd_hash_table
*table
;
291 struct elf64_hppa_dyn_hash_entry
*ret
;
292 ret
= (struct elf64_hppa_dyn_hash_entry
*) entry
;
294 /* Allocate the structure if it has not already been allocated by a
297 ret
= bfd_hash_allocate (table
, sizeof (*ret
));
302 /* Initialize our local data. All zeros, and definitely easier
303 than setting 8 bit fields. */
304 memset (ret
, 0, sizeof (*ret
));
306 /* Call the allocation method of the superclass. */
307 ret
= ((struct elf64_hppa_dyn_hash_entry
*)
308 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
313 /* Create the derived linker hash table. The PA64 ELF port uses this
314 derived hash table to keep information specific to the PA ElF
315 linker (without using static variables). */
317 static struct bfd_link_hash_table
*
318 elf64_hppa_hash_table_create (abfd
)
321 struct elf64_hppa_link_hash_table
*ret
;
323 ret
= bfd_zalloc (abfd
, (bfd_size_type
) sizeof (*ret
));
326 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
327 _bfd_elf_link_hash_newfunc
))
329 bfd_release (abfd
, ret
);
333 if (!elf64_hppa_dyn_hash_table_init (&ret
->dyn_hash_table
, abfd
,
334 elf64_hppa_new_dyn_hash_entry
))
336 return &ret
->root
.root
;
339 /* Look up an entry in a PA64 ELF linker hash table. */
341 static struct elf64_hppa_dyn_hash_entry
*
342 elf64_hppa_dyn_hash_lookup(table
, string
, create
, copy
)
343 struct elf64_hppa_dyn_hash_table
*table
;
345 boolean create
, copy
;
347 return ((struct elf64_hppa_dyn_hash_entry
*)
348 bfd_hash_lookup (&table
->root
, string
, create
, copy
));
351 /* Traverse a PA64 ELF linker hash table. */
354 elf64_hppa_dyn_hash_traverse (table
, func
, info
)
355 struct elf64_hppa_dyn_hash_table
*table
;
356 boolean (*func
) PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
361 (boolean (*) PARAMS ((struct bfd_hash_entry
*, PTR
))) func
,
365 /* Return nonzero if ABFD represents a PA2.0 ELF64 file.
367 Additionally we set the default architecture and machine. */
369 elf64_hppa_object_p (abfd
)
372 Elf_Internal_Ehdr
* i_ehdrp
;
375 i_ehdrp
= elf_elfheader (abfd
);
376 if (strcmp (bfd_get_target (abfd
), "elf64-hppa-linux") == 0)
378 if (i_ehdrp
->e_ident
[EI_OSABI
] != ELFOSABI_LINUX
)
383 if (i_ehdrp
->e_ident
[EI_OSABI
] != ELFOSABI_HPUX
)
387 flags
= i_ehdrp
->e_flags
;
388 switch (flags
& (EF_PARISC_ARCH
| EF_PARISC_WIDE
))
391 return bfd_default_set_arch_mach (abfd
, bfd_arch_hppa
, 10);
393 return bfd_default_set_arch_mach (abfd
, bfd_arch_hppa
, 11);
395 return bfd_default_set_arch_mach (abfd
, bfd_arch_hppa
, 20);
396 case EFA_PARISC_2_0
| EF_PARISC_WIDE
:
397 return bfd_default_set_arch_mach (abfd
, bfd_arch_hppa
, 25);
399 /* Don't be fussy. */
403 /* Given section type (hdr->sh_type), return a boolean indicating
404 whether or not the section is an elf64-hppa specific section. */
406 elf64_hppa_section_from_shdr (abfd
, hdr
, name
)
408 Elf64_Internal_Shdr
*hdr
;
413 switch (hdr
->sh_type
)
416 if (strcmp (name
, ".PARISC.archext") != 0)
419 case SHT_PARISC_UNWIND
:
420 if (strcmp (name
, ".PARISC.unwind") != 0)
424 case SHT_PARISC_ANNOT
:
429 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
431 newsect
= hdr
->bfd_section
;
436 /* Construct a string for use in the elf64_hppa_dyn_hash_table. The
437 name describes what was once potentially anonymous memory. We
438 allocate memory as necessary, possibly reusing PBUF/PLEN. */
441 get_dyn_name (sec
, h
, rel
, pbuf
, plen
)
443 struct elf_link_hash_entry
*h
;
444 const Elf_Internal_Rela
*rel
;
452 if (h
&& rel
->r_addend
== 0)
453 return h
->root
.root
.string
;
456 nlen
= strlen (h
->root
.root
.string
);
458 nlen
= 8 + 1 + sizeof (rel
->r_info
) * 2 - 8;
459 tlen
= nlen
+ 1 + sizeof (rel
->r_addend
) * 2 + 1;
467 *pbuf
= buf
= malloc (tlen
);
475 memcpy (buf
, h
->root
.root
.string
, nlen
);
477 sprintf_vma (buf
+ nlen
, rel
->r_addend
);
481 nlen
= sprintf (buf
, "%x:%lx",
482 sec
->id
& 0xffffffff,
483 (long) ELF64_R_SYM (rel
->r_info
));
487 sprintf_vma (buf
+ nlen
, rel
->r_addend
);
494 /* SEC is a section containing relocs for an input BFD when linking; return
495 a suitable section for holding relocs in the output BFD for a link. */
498 get_reloc_section (abfd
, hppa_info
, sec
)
500 struct elf64_hppa_link_hash_table
*hppa_info
;
503 const char *srel_name
;
507 srel_name
= (bfd_elf_string_from_elf_section
508 (abfd
, elf_elfheader(abfd
)->e_shstrndx
,
509 elf_section_data(sec
)->rel_hdr
.sh_name
));
510 if (srel_name
== NULL
)
513 BFD_ASSERT ((strncmp (srel_name
, ".rela", 5) == 0
514 && strcmp (bfd_get_section_name (abfd
, sec
),
516 || (strncmp (srel_name
, ".rel", 4) == 0
517 && strcmp (bfd_get_section_name (abfd
, sec
),
520 dynobj
= hppa_info
->root
.dynobj
;
522 hppa_info
->root
.dynobj
= dynobj
= abfd
;
524 srel
= bfd_get_section_by_name (dynobj
, srel_name
);
527 srel
= bfd_make_section (dynobj
, srel_name
);
529 || !bfd_set_section_flags (dynobj
, srel
,
536 || !bfd_set_section_alignment (dynobj
, srel
, 3))
540 hppa_info
->other_rel_sec
= srel
;
544 /* Add a new entry to the list of dynamic relocations against DYN_H.
546 We use this to keep a record of all the FPTR relocations against a
547 particular symbol so that we can create FPTR relocations in the
551 count_dyn_reloc (abfd
, dyn_h
, type
, sec
, sec_symndx
, offset
, addend
)
553 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
560 struct elf64_hppa_dyn_reloc_entry
*rent
;
562 rent
= (struct elf64_hppa_dyn_reloc_entry
*)
563 bfd_alloc (abfd
, (bfd_size_type
) sizeof (*rent
));
567 rent
->next
= dyn_h
->reloc_entries
;
570 rent
->sec_symndx
= sec_symndx
;
571 rent
->offset
= offset
;
572 rent
->addend
= addend
;
573 dyn_h
->reloc_entries
= rent
;
578 /* Scan the RELOCS and record the type of dynamic entries that each
579 referenced symbol needs. */
582 elf64_hppa_check_relocs (abfd
, info
, sec
, relocs
)
584 struct bfd_link_info
*info
;
586 const Elf_Internal_Rela
*relocs
;
588 struct elf64_hppa_link_hash_table
*hppa_info
;
589 const Elf_Internal_Rela
*relend
;
590 Elf_Internal_Shdr
*symtab_hdr
;
591 Elf_Internal_Shdr
*shndx_hdr
;
592 const Elf_Internal_Rela
*rel
;
593 asection
*dlt
, *plt
, *stubs
;
598 if (info
->relocateable
)
601 /* If this is the first dynamic object found in the link, create
602 the special sections required for dynamic linking. */
603 if (! elf_hash_table (info
)->dynamic_sections_created
)
605 if (! bfd_elf64_link_create_dynamic_sections (abfd
, info
))
609 hppa_info
= elf64_hppa_hash_table (info
);
610 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
612 /* If necessary, build a new table holding section symbols indices
613 for this BFD. This is disgusting. */
615 if (info
->shared
&& hppa_info
->section_syms_bfd
!= abfd
)
618 unsigned int highest_shndx
;
619 Elf_Internal_Sym
*local_syms
, *isym
;
620 Elf64_External_Sym
*ext_syms
, *esym
;
621 Elf_External_Sym_Shndx
*shndx_buf
, *shndx
;
624 /* We're done with the old cache of section index to section symbol
625 index information. Free it.
627 ?!? Note we leak the last section_syms array. Presumably we
628 could free it in one of the later routines in this file. */
629 if (hppa_info
->section_syms
)
630 free (hppa_info
->section_syms
);
632 /* Allocate memory for the internal and external symbols. */
633 amt
= symtab_hdr
->sh_info
;
634 amt
*= sizeof (Elf_Internal_Sym
);
635 local_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
636 if (local_syms
== NULL
)
639 amt
= symtab_hdr
->sh_info
;
640 amt
*= sizeof (Elf64_External_Sym
);
641 ext_syms
= (Elf64_External_Sym
*) bfd_malloc (amt
);
642 if (ext_syms
== NULL
)
648 /* Read in the local symbols. */
649 if (bfd_seek (abfd
, symtab_hdr
->sh_offset
, SEEK_SET
) != 0
650 || bfd_bread (ext_syms
, amt
, abfd
) != amt
)
658 shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
659 if (shndx_hdr
->sh_size
!= 0)
661 amt
= symtab_hdr
->sh_info
;
662 amt
*= sizeof (Elf_External_Sym_Shndx
);
663 shndx_buf
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
664 if (shndx_buf
== NULL
)
671 if (bfd_seek (abfd
, shndx_hdr
->sh_offset
, SEEK_SET
) != 0
672 || bfd_bread (shndx_buf
, amt
, abfd
) != amt
)
681 /* Swap in the local symbols, also record the highest section index
682 referenced by the local symbols. */
684 for (i
= 0, isym
= local_syms
, esym
= ext_syms
, shndx
= shndx_buf
;
685 i
< symtab_hdr
->sh_info
;
686 i
++, esym
++, isym
++, shndx
= (shndx
!= NULL
? shndx
+ 1 : NULL
))
688 bfd_elf64_swap_symbol_in (abfd
, (const PTR
) esym
, (const PTR
) shndx
,
690 if (isym
->st_shndx
> highest_shndx
)
691 highest_shndx
= isym
->st_shndx
;
694 /* Now we can free the external symbols. */
698 /* Allocate an array to hold the section index to section symbol index
699 mapping. Bump by one since we start counting at zero. */
703 hppa_info
->section_syms
= (int *) bfd_malloc (amt
);
705 /* Now walk the local symbols again. If we find a section symbol,
706 record the index of the symbol into the section_syms array. */
707 for (isym
= local_syms
, i
= 0; i
< symtab_hdr
->sh_info
; i
++, isym
++)
709 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
710 hppa_info
->section_syms
[isym
->st_shndx
] = i
;
713 /* We are finished with the local symbols. Get rid of them. */
716 /* Record which BFD we built the section_syms mapping for. */
717 hppa_info
->section_syms_bfd
= abfd
;
720 /* Record the symbol index for this input section. We may need it for
721 relocations when building shared libraries. When not building shared
722 libraries this value is never really used, but assign it to zero to
723 prevent out of bounds memory accesses in other routines. */
726 sec_symndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
728 /* If we did not find a section symbol for this section, then
729 something went terribly wrong above. */
730 if (sec_symndx
== -1)
733 sec_symndx
= hppa_info
->section_syms
[sec_symndx
];
738 dlt
= plt
= stubs
= NULL
;
742 relend
= relocs
+ sec
->reloc_count
;
743 for (rel
= relocs
; rel
< relend
; ++rel
)
753 struct elf_link_hash_entry
*h
= NULL
;
754 unsigned long r_symndx
= ELF64_R_SYM (rel
->r_info
);
755 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
757 const char *addr_name
;
758 boolean maybe_dynamic
;
759 int dynrel_type
= R_PARISC_NONE
;
760 static reloc_howto_type
*howto
;
762 if (r_symndx
>= symtab_hdr
->sh_info
)
764 /* We're dealing with a global symbol -- find its hash entry
765 and mark it as being referenced. */
766 long indx
= r_symndx
- symtab_hdr
->sh_info
;
767 h
= elf_sym_hashes (abfd
)[indx
];
768 while (h
->root
.type
== bfd_link_hash_indirect
769 || h
->root
.type
== bfd_link_hash_warning
)
770 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
772 h
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_REGULAR
;
775 /* We can only get preliminary data on whether a symbol is
776 locally or externally defined, as not all of the input files
777 have yet been processed. Do something with what we know, as
778 this may help reduce memory usage and processing time later. */
779 maybe_dynamic
= false;
780 if (h
&& ((info
->shared
781 && (!info
->symbolic
|| info
->allow_shlib_undefined
) )
782 || ! (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)
783 || h
->root
.type
== bfd_link_hash_defweak
))
784 maybe_dynamic
= true;
786 howto
= elf_hppa_howto_table
+ ELF64_R_TYPE (rel
->r_info
);
790 /* These are simple indirect references to symbols through the
791 DLT. We need to create a DLT entry for any symbols which
792 appears in a DLTIND relocation. */
793 case R_PARISC_DLTIND21L
:
794 case R_PARISC_DLTIND14R
:
795 case R_PARISC_DLTIND14F
:
796 case R_PARISC_DLTIND14WR
:
797 case R_PARISC_DLTIND14DR
:
798 need_entry
= NEED_DLT
;
801 /* ?!? These need a DLT entry. But I have no idea what to do with
802 the "link time TP value. */
803 case R_PARISC_LTOFF_TP21L
:
804 case R_PARISC_LTOFF_TP14R
:
805 case R_PARISC_LTOFF_TP14F
:
806 case R_PARISC_LTOFF_TP64
:
807 case R_PARISC_LTOFF_TP14WR
:
808 case R_PARISC_LTOFF_TP14DR
:
809 case R_PARISC_LTOFF_TP16F
:
810 case R_PARISC_LTOFF_TP16WF
:
811 case R_PARISC_LTOFF_TP16DF
:
812 need_entry
= NEED_DLT
;
815 /* These are function calls. Depending on their precise target we
816 may need to make a stub for them. The stub uses the PLT, so we
817 need to create PLT entries for these symbols too. */
818 case R_PARISC_PCREL12F
:
819 case R_PARISC_PCREL17F
:
820 case R_PARISC_PCREL22F
:
821 case R_PARISC_PCREL32
:
822 case R_PARISC_PCREL64
:
823 case R_PARISC_PCREL21L
:
824 case R_PARISC_PCREL17R
:
825 case R_PARISC_PCREL17C
:
826 case R_PARISC_PCREL14R
:
827 case R_PARISC_PCREL14F
:
828 case R_PARISC_PCREL22C
:
829 case R_PARISC_PCREL14WR
:
830 case R_PARISC_PCREL14DR
:
831 case R_PARISC_PCREL16F
:
832 case R_PARISC_PCREL16WF
:
833 case R_PARISC_PCREL16DF
:
834 need_entry
= (NEED_PLT
| NEED_STUB
);
837 case R_PARISC_PLTOFF21L
:
838 case R_PARISC_PLTOFF14R
:
839 case R_PARISC_PLTOFF14F
:
840 case R_PARISC_PLTOFF14WR
:
841 case R_PARISC_PLTOFF14DR
:
842 case R_PARISC_PLTOFF16F
:
843 case R_PARISC_PLTOFF16WF
:
844 case R_PARISC_PLTOFF16DF
:
845 need_entry
= (NEED_PLT
);
849 if (info
->shared
|| maybe_dynamic
)
850 need_entry
= (NEED_DYNREL
);
851 dynrel_type
= R_PARISC_DIR64
;
854 /* This is an indirect reference through the DLT to get the address
855 of a OPD descriptor. Thus we need to make a DLT entry that points
857 case R_PARISC_LTOFF_FPTR21L
:
858 case R_PARISC_LTOFF_FPTR14R
:
859 case R_PARISC_LTOFF_FPTR14WR
:
860 case R_PARISC_LTOFF_FPTR14DR
:
861 case R_PARISC_LTOFF_FPTR32
:
862 case R_PARISC_LTOFF_FPTR64
:
863 case R_PARISC_LTOFF_FPTR16F
:
864 case R_PARISC_LTOFF_FPTR16WF
:
865 case R_PARISC_LTOFF_FPTR16DF
:
866 if (info
->shared
|| maybe_dynamic
)
867 need_entry
= (NEED_DLT
| NEED_OPD
);
869 need_entry
= (NEED_DLT
| NEED_OPD
);
870 dynrel_type
= R_PARISC_FPTR64
;
873 /* This is a simple OPD entry. */
874 case R_PARISC_FPTR64
:
875 if (info
->shared
|| maybe_dynamic
)
876 need_entry
= (NEED_OPD
| NEED_DYNREL
);
878 need_entry
= (NEED_OPD
);
879 dynrel_type
= R_PARISC_FPTR64
;
882 /* Add more cases as needed. */
888 /* Collect a canonical name for this address. */
889 addr_name
= get_dyn_name (sec
, h
, rel
, &buf
, &buf_len
);
891 /* Collect the canonical entry data for this address. */
892 dyn_h
= elf64_hppa_dyn_hash_lookup (&hppa_info
->dyn_hash_table
,
893 addr_name
, true, true);
896 /* Stash away enough information to be able to find this symbol
897 regardless of whether or not it is local or global. */
900 dyn_h
->sym_indx
= r_symndx
;
902 /* ?!? We may need to do some error checking in here. */
903 /* Create what's needed. */
904 if (need_entry
& NEED_DLT
)
906 if (! hppa_info
->dlt_sec
907 && ! get_dlt (abfd
, info
, hppa_info
))
912 if (need_entry
& NEED_PLT
)
914 if (! hppa_info
->plt_sec
915 && ! get_plt (abfd
, info
, hppa_info
))
920 if (need_entry
& NEED_STUB
)
922 if (! hppa_info
->stub_sec
923 && ! get_stub (abfd
, info
, hppa_info
))
925 dyn_h
->want_stub
= 1;
928 if (need_entry
& NEED_OPD
)
930 if (! hppa_info
->opd_sec
931 && ! get_opd (abfd
, info
, hppa_info
))
936 /* FPTRs are not allocated by the dynamic linker for PA64, though
937 it is possible that will change in the future. */
939 /* This could be a local function that had its address taken, in
940 which case H will be NULL. */
942 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
945 /* Add a new dynamic relocation to the chain of dynamic
946 relocations for this symbol. */
947 if ((need_entry
& NEED_DYNREL
) && (sec
->flags
& SEC_ALLOC
))
949 if (! hppa_info
->other_rel_sec
950 && ! get_reloc_section (abfd
, hppa_info
, sec
))
953 if (!count_dyn_reloc (abfd
, dyn_h
, dynrel_type
, sec
,
954 sec_symndx
, rel
->r_offset
, rel
->r_addend
))
957 /* If we are building a shared library and we just recorded
958 a dynamic R_PARISC_FPTR64 relocation, then make sure the
959 section symbol for this section ends up in the dynamic
961 if (info
->shared
&& dynrel_type
== R_PARISC_FPTR64
962 && ! (_bfd_elf64_link_record_local_dynamic_symbol
963 (info
, abfd
, sec_symndx
)))
978 struct elf64_hppa_allocate_data
980 struct bfd_link_info
*info
;
984 /* Should we do dynamic things to this symbol? */
987 elf64_hppa_dynamic_symbol_p (h
, info
)
988 struct elf_link_hash_entry
*h
;
989 struct bfd_link_info
*info
;
994 while (h
->root
.type
== bfd_link_hash_indirect
995 || h
->root
.type
== bfd_link_hash_warning
)
996 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
998 if (h
->dynindx
== -1)
1001 if (h
->root
.type
== bfd_link_hash_undefweak
1002 || h
->root
.type
== bfd_link_hash_defweak
)
1005 if (h
->root
.root
.string
[0] == '$' && h
->root
.root
.string
[1] == '$')
1008 if ((info
->shared
&& (!info
->symbolic
|| info
->allow_shlib_undefined
))
1009 || ((h
->elf_link_hash_flags
1010 & (ELF_LINK_HASH_DEF_DYNAMIC
| ELF_LINK_HASH_REF_REGULAR
))
1011 == (ELF_LINK_HASH_DEF_DYNAMIC
| ELF_LINK_HASH_REF_REGULAR
)))
1017 /* Mark all funtions exported by this file so that we can later allocate
1018 entries in .opd for them. */
1021 elf64_hppa_mark_exported_functions (h
, data
)
1022 struct elf_link_hash_entry
*h
;
1025 struct bfd_link_info
*info
= (struct bfd_link_info
*)data
;
1026 struct elf64_hppa_link_hash_table
*hppa_info
;
1028 hppa_info
= elf64_hppa_hash_table (info
);
1030 if (h
->root
.type
== bfd_link_hash_warning
)
1031 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1034 && (h
->root
.type
== bfd_link_hash_defined
1035 || h
->root
.type
== bfd_link_hash_defweak
)
1036 && h
->root
.u
.def
.section
->output_section
!= NULL
1037 && h
->type
== STT_FUNC
)
1039 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1041 /* Add this symbol to the PA64 linker hash table. */
1042 dyn_h
= elf64_hppa_dyn_hash_lookup (&hppa_info
->dyn_hash_table
,
1043 h
->root
.root
.string
, true, true);
1047 if (! hppa_info
->opd_sec
1048 && ! get_opd (hppa_info
->root
.dynobj
, info
, hppa_info
))
1051 dyn_h
->want_opd
= 1;
1052 /* Put a flag here for output_symbol_hook. */
1053 dyn_h
->st_shndx
= -1;
1054 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
1060 /* Allocate space for a DLT entry. */
1063 allocate_global_data_dlt (dyn_h
, data
)
1064 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1067 struct elf64_hppa_allocate_data
*x
= (struct elf64_hppa_allocate_data
*)data
;
1069 if (dyn_h
->want_dlt
)
1071 struct elf_link_hash_entry
*h
= dyn_h
->h
;
1073 if (x
->info
->shared
)
1075 /* Possibly add the symbol to the local dynamic symbol
1076 table since we might need to create a dynamic relocation
1079 || (h
->dynindx
== -1 && h
->type
!= STT_PARISC_MILLI
))
1082 owner
= (h
? h
->root
.u
.def
.section
->owner
: dyn_h
->owner
);
1084 if (! (_bfd_elf64_link_record_local_dynamic_symbol
1085 (x
->info
, owner
, dyn_h
->sym_indx
)))
1090 dyn_h
->dlt_offset
= x
->ofs
;
1091 x
->ofs
+= DLT_ENTRY_SIZE
;
1096 /* Allocate space for a DLT.PLT entry. */
1099 allocate_global_data_plt (dyn_h
, data
)
1100 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1103 struct elf64_hppa_allocate_data
*x
= (struct elf64_hppa_allocate_data
*)data
;
1106 && elf64_hppa_dynamic_symbol_p (dyn_h
->h
, x
->info
)
1107 && !((dyn_h
->h
->root
.type
== bfd_link_hash_defined
1108 || dyn_h
->h
->root
.type
== bfd_link_hash_defweak
)
1109 && dyn_h
->h
->root
.u
.def
.section
->output_section
!= NULL
))
1111 dyn_h
->plt_offset
= x
->ofs
;
1112 x
->ofs
+= PLT_ENTRY_SIZE
;
1113 if (dyn_h
->plt_offset
< 0x2000)
1114 elf64_hppa_hash_table (x
->info
)->gp_offset
= dyn_h
->plt_offset
;
1117 dyn_h
->want_plt
= 0;
1122 /* Allocate space for a STUB entry. */
1125 allocate_global_data_stub (dyn_h
, data
)
1126 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1129 struct elf64_hppa_allocate_data
*x
= (struct elf64_hppa_allocate_data
*)data
;
1131 if (dyn_h
->want_stub
1132 && elf64_hppa_dynamic_symbol_p (dyn_h
->h
, x
->info
)
1133 && !((dyn_h
->h
->root
.type
== bfd_link_hash_defined
1134 || dyn_h
->h
->root
.type
== bfd_link_hash_defweak
)
1135 && dyn_h
->h
->root
.u
.def
.section
->output_section
!= NULL
))
1137 dyn_h
->stub_offset
= x
->ofs
;
1138 x
->ofs
+= sizeof (plt_stub
);
1141 dyn_h
->want_stub
= 0;
1145 /* Allocate space for a FPTR entry. */
1148 allocate_global_data_opd (dyn_h
, data
)
1149 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1152 struct elf64_hppa_allocate_data
*x
= (struct elf64_hppa_allocate_data
*)data
;
1154 if (dyn_h
->want_opd
)
1156 struct elf_link_hash_entry
*h
= dyn_h
->h
;
1159 while (h
->root
.type
== bfd_link_hash_indirect
1160 || h
->root
.type
== bfd_link_hash_warning
)
1161 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1163 /* We never need an opd entry for a symbol which is not
1164 defined by this output file. */
1165 if (h
&& (h
->root
.type
== bfd_link_hash_undefined
1166 || h
->root
.u
.def
.section
->output_section
== NULL
))
1167 dyn_h
->want_opd
= 0;
1169 /* If we are creating a shared library, took the address of a local
1170 function or might export this function from this object file, then
1171 we have to create an opd descriptor. */
1172 else if (x
->info
->shared
1174 || (h
->dynindx
== -1 && h
->type
!= STT_PARISC_MILLI
)
1175 || (h
->root
.type
== bfd_link_hash_defined
1176 || h
->root
.type
== bfd_link_hash_defweak
))
1178 /* If we are creating a shared library, then we will have to
1179 create a runtime relocation for the symbol to properly
1180 initialize the .opd entry. Make sure the symbol gets
1181 added to the dynamic symbol table. */
1183 && (h
== NULL
|| (h
->dynindx
== -1)))
1186 owner
= (h
? h
->root
.u
.def
.section
->owner
: dyn_h
->owner
);
1188 if (!_bfd_elf64_link_record_local_dynamic_symbol
1189 (x
->info
, owner
, dyn_h
->sym_indx
))
1193 /* This may not be necessary or desirable anymore now that
1194 we have some support for dealing with section symbols
1195 in dynamic relocs. But name munging does make the result
1196 much easier to debug. ie, the EPLT reloc will reference
1197 a symbol like .foobar, instead of .text + offset. */
1198 if (x
->info
->shared
&& h
)
1201 struct elf_link_hash_entry
*nh
;
1203 new_name
= alloca (strlen (h
->root
.root
.string
) + 2);
1205 strcpy (new_name
+ 1, h
->root
.root
.string
);
1207 nh
= elf_link_hash_lookup (elf_hash_table (x
->info
),
1208 new_name
, true, true, true);
1210 nh
->root
.type
= h
->root
.type
;
1211 nh
->root
.u
.def
.value
= h
->root
.u
.def
.value
;
1212 nh
->root
.u
.def
.section
= h
->root
.u
.def
.section
;
1214 if (! bfd_elf64_link_record_dynamic_symbol (x
->info
, nh
))
1218 dyn_h
->opd_offset
= x
->ofs
;
1219 x
->ofs
+= OPD_ENTRY_SIZE
;
1222 /* Otherwise we do not need an opd entry. */
1224 dyn_h
->want_opd
= 0;
1229 /* HP requires the EI_OSABI field to be filled in. The assignment to
1230 EI_ABIVERSION may not be strictly necessary. */
1233 elf64_hppa_post_process_headers (abfd
, link_info
)
1235 struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
;
1237 Elf_Internal_Ehdr
* i_ehdrp
;
1239 i_ehdrp
= elf_elfheader (abfd
);
1241 if (strcmp (bfd_get_target (abfd
), "elf64-hppa-linux") == 0)
1243 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_LINUX
;
1247 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_HPUX
;
1248 i_ehdrp
->e_ident
[EI_ABIVERSION
] = 1;
1252 /* Create function descriptor section (.opd). This section is called .opd
1253 because it contains "official prodecure descriptors". The "official"
1254 refers to the fact that these descriptors are used when taking the address
1255 of a procedure, thus ensuring a unique address for each procedure. */
1258 get_opd (abfd
, info
, hppa_info
)
1260 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1261 struct elf64_hppa_link_hash_table
*hppa_info
;
1266 opd
= hppa_info
->opd_sec
;
1269 dynobj
= hppa_info
->root
.dynobj
;
1271 hppa_info
->root
.dynobj
= dynobj
= abfd
;
1273 opd
= bfd_make_section (dynobj
, ".opd");
1275 || !bfd_set_section_flags (dynobj
, opd
,
1280 | SEC_LINKER_CREATED
))
1281 || !bfd_set_section_alignment (abfd
, opd
, 3))
1287 hppa_info
->opd_sec
= opd
;
1293 /* Create the PLT section. */
1296 get_plt (abfd
, info
, hppa_info
)
1298 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1299 struct elf64_hppa_link_hash_table
*hppa_info
;
1304 plt
= hppa_info
->plt_sec
;
1307 dynobj
= hppa_info
->root
.dynobj
;
1309 hppa_info
->root
.dynobj
= dynobj
= abfd
;
1311 plt
= bfd_make_section (dynobj
, ".plt");
1313 || !bfd_set_section_flags (dynobj
, plt
,
1318 | SEC_LINKER_CREATED
))
1319 || !bfd_set_section_alignment (abfd
, plt
, 3))
1325 hppa_info
->plt_sec
= plt
;
1331 /* Create the DLT section. */
1334 get_dlt (abfd
, info
, hppa_info
)
1336 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1337 struct elf64_hppa_link_hash_table
*hppa_info
;
1342 dlt
= hppa_info
->dlt_sec
;
1345 dynobj
= hppa_info
->root
.dynobj
;
1347 hppa_info
->root
.dynobj
= dynobj
= abfd
;
1349 dlt
= bfd_make_section (dynobj
, ".dlt");
1351 || !bfd_set_section_flags (dynobj
, dlt
,
1356 | SEC_LINKER_CREATED
))
1357 || !bfd_set_section_alignment (abfd
, dlt
, 3))
1363 hppa_info
->dlt_sec
= dlt
;
1369 /* Create the stubs section. */
1372 get_stub (abfd
, info
, hppa_info
)
1374 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1375 struct elf64_hppa_link_hash_table
*hppa_info
;
1380 stub
= hppa_info
->stub_sec
;
1383 dynobj
= hppa_info
->root
.dynobj
;
1385 hppa_info
->root
.dynobj
= dynobj
= abfd
;
1387 stub
= bfd_make_section (dynobj
, ".stub");
1389 || !bfd_set_section_flags (dynobj
, stub
,
1395 | SEC_LINKER_CREATED
))
1396 || !bfd_set_section_alignment (abfd
, stub
, 3))
1402 hppa_info
->stub_sec
= stub
;
1408 /* Create sections necessary for dynamic linking. This is only a rough
1409 cut and will likely change as we learn more about the somewhat
1410 unusual dynamic linking scheme HP uses.
1413 Contains code to implement cross-space calls. The first time one
1414 of the stubs is used it will call into the dynamic linker, later
1415 calls will go straight to the target.
1417 The only stub we support right now looks like
1421 ldd OFFSET+8(%dp),%dp
1423 Other stubs may be needed in the future. We may want the remove
1424 the break/nop instruction. It is only used right now to keep the
1425 offset of a .plt entry and a .stub entry in sync.
1428 This is what most people call the .got. HP used a different name.
1432 Relocations for the DLT.
1435 Function pointers as address,gp pairs.
1438 Should contain dynamic IPLT (and EPLT?) relocations.
1444 EPLT relocations for symbols exported from shared libraries. */
1447 elf64_hppa_create_dynamic_sections (abfd
, info
)
1449 struct bfd_link_info
*info
;
1453 if (! get_stub (abfd
, info
, elf64_hppa_hash_table (info
)))
1456 if (! get_dlt (abfd
, info
, elf64_hppa_hash_table (info
)))
1459 if (! get_plt (abfd
, info
, elf64_hppa_hash_table (info
)))
1462 if (! get_opd (abfd
, info
, elf64_hppa_hash_table (info
)))
1465 s
= bfd_make_section(abfd
, ".rela.dlt");
1467 || !bfd_set_section_flags (abfd
, s
, (SEC_ALLOC
| SEC_LOAD
1471 | SEC_LINKER_CREATED
))
1472 || !bfd_set_section_alignment (abfd
, s
, 3))
1474 elf64_hppa_hash_table (info
)->dlt_rel_sec
= s
;
1476 s
= bfd_make_section(abfd
, ".rela.plt");
1478 || !bfd_set_section_flags (abfd
, s
, (SEC_ALLOC
| SEC_LOAD
1482 | SEC_LINKER_CREATED
))
1483 || !bfd_set_section_alignment (abfd
, s
, 3))
1485 elf64_hppa_hash_table (info
)->plt_rel_sec
= s
;
1487 s
= bfd_make_section(abfd
, ".rela.data");
1489 || !bfd_set_section_flags (abfd
, s
, (SEC_ALLOC
| SEC_LOAD
1493 | SEC_LINKER_CREATED
))
1494 || !bfd_set_section_alignment (abfd
, s
, 3))
1496 elf64_hppa_hash_table (info
)->other_rel_sec
= s
;
1498 s
= bfd_make_section(abfd
, ".rela.opd");
1500 || !bfd_set_section_flags (abfd
, s
, (SEC_ALLOC
| SEC_LOAD
1504 | SEC_LINKER_CREATED
))
1505 || !bfd_set_section_alignment (abfd
, s
, 3))
1507 elf64_hppa_hash_table (info
)->opd_rel_sec
= s
;
1512 /* Allocate dynamic relocations for those symbols that turned out
1516 allocate_dynrel_entries (dyn_h
, data
)
1517 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1520 struct elf64_hppa_allocate_data
*x
= (struct elf64_hppa_allocate_data
*)data
;
1521 struct elf64_hppa_link_hash_table
*hppa_info
;
1522 struct elf64_hppa_dyn_reloc_entry
*rent
;
1523 boolean dynamic_symbol
, shared
;
1525 hppa_info
= elf64_hppa_hash_table (x
->info
);
1526 dynamic_symbol
= elf64_hppa_dynamic_symbol_p (dyn_h
->h
, x
->info
);
1527 shared
= x
->info
->shared
;
1529 /* We may need to allocate relocations for a non-dynamic symbol
1530 when creating a shared library. */
1531 if (!dynamic_symbol
&& !shared
)
1534 /* Take care of the normal data relocations. */
1536 for (rent
= dyn_h
->reloc_entries
; rent
; rent
= rent
->next
)
1538 /* Allocate one iff we are building a shared library, the relocation
1539 isn't a R_PARISC_FPTR64, or we don't want an opd entry. */
1540 if (!shared
&& rent
->type
== R_PARISC_FPTR64
&& dyn_h
->want_opd
)
1543 hppa_info
->other_rel_sec
->_raw_size
+= sizeof (Elf64_External_Rela
);
1545 /* Make sure this symbol gets into the dynamic symbol table if it is
1546 not already recorded. ?!? This should not be in the loop since
1547 the symbol need only be added once. */
1549 || (dyn_h
->h
->dynindx
== -1 && dyn_h
->h
->type
!= STT_PARISC_MILLI
))
1550 if (!_bfd_elf64_link_record_local_dynamic_symbol
1551 (x
->info
, rent
->sec
->owner
, dyn_h
->sym_indx
))
1555 /* Take care of the GOT and PLT relocations. */
1557 if ((dynamic_symbol
|| shared
) && dyn_h
->want_dlt
)
1558 hppa_info
->dlt_rel_sec
->_raw_size
+= sizeof (Elf64_External_Rela
);
1560 /* If we are building a shared library, then every symbol that has an
1561 opd entry will need an EPLT relocation to relocate the symbol's address
1562 and __gp value based on the runtime load address. */
1563 if (shared
&& dyn_h
->want_opd
)
1564 hppa_info
->opd_rel_sec
->_raw_size
+= sizeof (Elf64_External_Rela
);
1566 if (dyn_h
->want_plt
&& dynamic_symbol
)
1568 bfd_size_type t
= 0;
1570 /* Dynamic symbols get one IPLT relocation. Local symbols in
1571 shared libraries get two REL relocations. Local symbols in
1572 main applications get nothing. */
1574 t
= sizeof (Elf64_External_Rela
);
1576 t
= 2 * sizeof (Elf64_External_Rela
);
1578 hppa_info
->plt_rel_sec
->_raw_size
+= t
;
1584 /* Adjust a symbol defined by a dynamic object and referenced by a
1588 elf64_hppa_adjust_dynamic_symbol (info
, h
)
1589 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1590 struct elf_link_hash_entry
*h
;
1592 /* ??? Undefined symbols with PLT entries should be re-defined
1593 to be the PLT entry. */
1595 /* If this is a weak symbol, and there is a real definition, the
1596 processor independent code will have arranged for us to see the
1597 real definition first, and we can just use the same value. */
1598 if (h
->weakdef
!= NULL
)
1600 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
1601 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
1602 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
1603 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
1607 /* If this is a reference to a symbol defined by a dynamic object which
1608 is not a function, we might allocate the symbol in our .dynbss section
1609 and allocate a COPY dynamic relocation.
1611 But PA64 code is canonically PIC, so as a rule we can avoid this sort
1617 /* This function is called via elf_link_hash_traverse to mark millicode
1618 symbols with a dynindx of -1 and to remove the string table reference
1619 from the dynamic symbol table. If the symbol is not a millicode symbol,
1620 elf64_hppa_mark_exported_functions is called. */
1623 elf64_hppa_mark_milli_and_exported_functions (h
, data
)
1624 struct elf_link_hash_entry
*h
;
1627 struct bfd_link_info
*info
= (struct bfd_link_info
*)data
;
1628 struct elf_link_hash_entry
*elf
= h
;
1630 if (elf
->root
.type
== bfd_link_hash_warning
)
1631 elf
= (struct elf_link_hash_entry
*) elf
->root
.u
.i
.link
;
1633 if (elf
->type
== STT_PARISC_MILLI
)
1635 if (elf
->dynindx
!= -1)
1638 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
1644 return elf64_hppa_mark_exported_functions (h
, data
);
1647 /* Set the final sizes of the dynamic sections and allocate memory for
1648 the contents of our special sections. */
1651 elf64_hppa_size_dynamic_sections (output_bfd
, info
)
1653 struct bfd_link_info
*info
;
1660 struct elf64_hppa_allocate_data data
;
1661 struct elf64_hppa_link_hash_table
*hppa_info
;
1663 hppa_info
= elf64_hppa_hash_table (info
);
1665 dynobj
= elf_hash_table (info
)->dynobj
;
1666 BFD_ASSERT (dynobj
!= NULL
);
1668 /* Mark each function this program exports so that we will allocate
1669 space in the .opd section for each function's FPTR. If we are
1670 creating dynamic sections, change the dynamic index of millicode
1671 symbols to -1 and remove them from the string table for .dynstr.
1673 We have to traverse the main linker hash table since we have to
1674 find functions which may not have been mentioned in any relocs. */
1675 elf_link_hash_traverse (elf_hash_table (info
),
1676 (elf_hash_table (info
)->dynamic_sections_created
1677 ? elf64_hppa_mark_milli_and_exported_functions
1678 : elf64_hppa_mark_exported_functions
),
1681 if (elf_hash_table (info
)->dynamic_sections_created
)
1683 /* Set the contents of the .interp section to the interpreter. */
1686 s
= bfd_get_section_by_name (dynobj
, ".interp");
1687 BFD_ASSERT (s
!= NULL
);
1688 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1689 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1694 /* We may have created entries in the .rela.got section.
1695 However, if we are not creating the dynamic sections, we will
1696 not actually use these entries. Reset the size of .rela.dlt,
1697 which will cause it to get stripped from the output file
1699 s
= bfd_get_section_by_name (dynobj
, ".rela.dlt");
1704 /* Allocate the GOT entries. */
1707 if (elf64_hppa_hash_table (info
)->dlt_sec
)
1710 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
1711 allocate_global_data_dlt
, &data
);
1712 hppa_info
->dlt_sec
->_raw_size
= data
.ofs
;
1715 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
1716 allocate_global_data_plt
, &data
);
1717 hppa_info
->plt_sec
->_raw_size
= data
.ofs
;
1720 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
1721 allocate_global_data_stub
, &data
);
1722 hppa_info
->stub_sec
->_raw_size
= data
.ofs
;
1725 /* Allocate space for entries in the .opd section. */
1726 if (elf64_hppa_hash_table (info
)->opd_sec
)
1729 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
1730 allocate_global_data_opd
, &data
);
1731 hppa_info
->opd_sec
->_raw_size
= data
.ofs
;
1734 /* Now allocate space for dynamic relocations, if necessary. */
1735 if (hppa_info
->root
.dynamic_sections_created
)
1736 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
1737 allocate_dynrel_entries
, &data
);
1739 /* The sizes of all the sections are set. Allocate memory for them. */
1743 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1748 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1751 /* It's OK to base decisions on the section name, because none
1752 of the dynobj section names depend upon the input files. */
1753 name
= bfd_get_section_name (dynobj
, s
);
1757 if (strcmp (name
, ".plt") == 0)
1759 /* Strip this section if we don't need it; see the comment below. */
1760 if (s
->_raw_size
== 0)
1766 /* Remember whether there is a PLT. */
1770 else if (strcmp (name
, ".dlt") == 0)
1772 /* Strip this section if we don't need it; see the comment below. */
1773 if (s
->_raw_size
== 0)
1778 else if (strcmp (name
, ".opd") == 0)
1780 /* Strip this section if we don't need it; see the comment below. */
1781 if (s
->_raw_size
== 0)
1786 else if (strncmp (name
, ".rela", 5) == 0)
1788 /* If we don't need this section, strip it from the output file.
1789 This is mostly to handle .rela.bss and .rela.plt. We must
1790 create both sections in create_dynamic_sections, because they
1791 must be created before the linker maps input sections to output
1792 sections. The linker does that before adjust_dynamic_symbol
1793 is called, and it is that function which decides whether
1794 anything needs to go into these sections. */
1795 if (s
->_raw_size
== 0)
1797 /* If we don't need this section, strip it from the
1798 output file. This is mostly to handle .rela.bss and
1799 .rela.plt. We must create both sections in
1800 create_dynamic_sections, because they must be created
1801 before the linker maps input sections to output
1802 sections. The linker does that before
1803 adjust_dynamic_symbol is called, and it is that
1804 function which decides whether anything needs to go
1805 into these sections. */
1812 /* Remember whether there are any reloc sections other
1814 if (strcmp (name
, ".rela.plt") != 0)
1816 const char *outname
;
1820 /* If this relocation section applies to a read only
1821 section, then we probably need a DT_TEXTREL
1822 entry. The entries in the .rela.plt section
1823 really apply to the .got section, which we
1824 created ourselves and so know is not readonly. */
1825 outname
= bfd_get_section_name (output_bfd
,
1827 target
= bfd_get_section_by_name (output_bfd
, outname
+ 4);
1829 && (target
->flags
& SEC_READONLY
) != 0
1830 && (target
->flags
& SEC_ALLOC
) != 0)
1834 /* We use the reloc_count field as a counter if we need
1835 to copy relocs into the output file. */
1839 else if (strncmp (name
, ".dlt", 4) != 0
1840 && strcmp (name
, ".stub") != 0
1841 && strcmp (name
, ".got") != 0)
1843 /* It's not one of our sections, so don't allocate space. */
1849 _bfd_strip_section_from_output (info
, s
);
1853 /* Allocate memory for the section contents if it has not
1854 been allocated already. We use bfd_zalloc here in case
1855 unused entries are not reclaimed before the section's
1856 contents are written out. This should not happen, but this
1857 way if it does, we get a R_PARISC_NONE reloc instead of
1859 if (s
->contents
== NULL
)
1861 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
1862 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
1867 if (elf_hash_table (info
)->dynamic_sections_created
)
1869 /* Always create a DT_PLTGOT. It actually has nothing to do with
1870 the PLT, it is how we communicate the __gp value of a load
1871 module to the dynamic linker. */
1872 #define add_dynamic_entry(TAG, VAL) \
1873 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1875 if (!add_dynamic_entry (DT_HP_DLD_FLAGS
, 0)
1876 || !add_dynamic_entry (DT_PLTGOT
, 0))
1879 /* Add some entries to the .dynamic section. We fill in the
1880 values later, in elf64_hppa_finish_dynamic_sections, but we
1881 must add the entries now so that we get the correct size for
1882 the .dynamic section. The DT_DEBUG entry is filled in by the
1883 dynamic linker and used by the debugger. */
1886 if (!add_dynamic_entry (DT_DEBUG
, 0)
1887 || !add_dynamic_entry (DT_HP_DLD_HOOK
, 0)
1888 || !add_dynamic_entry (DT_HP_LOAD_MAP
, 0))
1894 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
1895 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
1896 || !add_dynamic_entry (DT_JMPREL
, 0))
1902 if (!add_dynamic_entry (DT_RELA
, 0)
1903 || !add_dynamic_entry (DT_RELASZ
, 0)
1904 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
1910 if (!add_dynamic_entry (DT_TEXTREL
, 0))
1912 info
->flags
|= DF_TEXTREL
;
1915 #undef add_dynamic_entry
1920 /* Called after we have output the symbol into the dynamic symbol
1921 table, but before we output the symbol into the normal symbol
1924 For some symbols we had to change their address when outputting
1925 the dynamic symbol table. We undo that change here so that
1926 the symbols have their expected value in the normal symbol
1930 elf64_hppa_link_output_symbol_hook (abfd
, info
, name
, sym
, input_sec
)
1931 bfd
*abfd ATTRIBUTE_UNUSED
;
1932 struct bfd_link_info
*info
;
1934 Elf_Internal_Sym
*sym
;
1935 asection
*input_sec ATTRIBUTE_UNUSED
;
1937 struct elf64_hppa_link_hash_table
*hppa_info
;
1938 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1940 /* We may be called with the file symbol or section symbols.
1941 They never need munging, so it is safe to ignore them. */
1945 /* Get the PA dyn_symbol (if any) associated with NAME. */
1946 hppa_info
= elf64_hppa_hash_table (info
);
1947 dyn_h
= elf64_hppa_dyn_hash_lookup (&hppa_info
->dyn_hash_table
,
1948 name
, false, false);
1950 /* Function symbols for which we created .opd entries *may* have been
1951 munged by finish_dynamic_symbol and have to be un-munged here.
1953 Note that finish_dynamic_symbol sometimes turns dynamic symbols
1954 into non-dynamic ones, so we initialize st_shndx to -1 in
1955 mark_exported_functions and check to see if it was overwritten
1956 here instead of just checking dyn_h->h->dynindx. */
1957 if (dyn_h
&& dyn_h
->want_opd
&& dyn_h
->st_shndx
!= -1)
1959 /* Restore the saved value and section index. */
1960 sym
->st_value
= dyn_h
->st_value
;
1961 sym
->st_shndx
= dyn_h
->st_shndx
;
1967 /* Finish up dynamic symbol handling. We set the contents of various
1968 dynamic sections here. */
1971 elf64_hppa_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
1973 struct bfd_link_info
*info
;
1974 struct elf_link_hash_entry
*h
;
1975 Elf_Internal_Sym
*sym
;
1977 asection
*stub
, *splt
, *sdlt
, *sopd
, *spltrel
, *sdltrel
;
1978 struct elf64_hppa_link_hash_table
*hppa_info
;
1979 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1981 hppa_info
= elf64_hppa_hash_table (info
);
1982 dyn_h
= elf64_hppa_dyn_hash_lookup (&hppa_info
->dyn_hash_table
,
1983 h
->root
.root
.string
, false, false);
1985 stub
= hppa_info
->stub_sec
;
1986 splt
= hppa_info
->plt_sec
;
1987 sdlt
= hppa_info
->dlt_sec
;
1988 sopd
= hppa_info
->opd_sec
;
1989 spltrel
= hppa_info
->plt_rel_sec
;
1990 sdltrel
= hppa_info
->dlt_rel_sec
;
1992 /* Incredible. It is actually necessary to NOT use the symbol's real
1993 value when building the dynamic symbol table for a shared library.
1994 At least for symbols that refer to functions.
1996 We will store a new value and section index into the symbol long
1997 enough to output it into the dynamic symbol table, then we restore
1998 the original values (in elf64_hppa_link_output_symbol_hook). */
1999 if (dyn_h
&& dyn_h
->want_opd
)
2001 BFD_ASSERT (sopd
!= NULL
)
2003 /* Save away the original value and section index so that we
2004 can restore them later. */
2005 dyn_h
->st_value
= sym
->st_value
;
2006 dyn_h
->st_shndx
= sym
->st_shndx
;
2008 /* For the dynamic symbol table entry, we want the value to be
2009 address of this symbol's entry within the .opd section. */
2010 sym
->st_value
= (dyn_h
->opd_offset
2011 + sopd
->output_offset
2012 + sopd
->output_section
->vma
);
2013 sym
->st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
2014 sopd
->output_section
);
2017 /* Initialize a .plt entry if requested. */
2018 if (dyn_h
&& dyn_h
->want_plt
2019 && elf64_hppa_dynamic_symbol_p (dyn_h
->h
, info
))
2022 Elf_Internal_Rela rel
;
2024 BFD_ASSERT (splt
!= NULL
&& spltrel
!= NULL
)
2026 /* We do not actually care about the value in the PLT entry
2027 if we are creating a shared library and the symbol is
2028 still undefined, we create a dynamic relocation to fill
2029 in the correct value. */
2030 if (info
->shared
&& h
->root
.type
== bfd_link_hash_undefined
)
2033 value
= (h
->root
.u
.def
.value
+ h
->root
.u
.def
.section
->vma
);
2035 /* Fill in the entry in the procedure linkage table.
2037 The format of a plt entry is
2040 plt_offset is the offset within the PLT section at which to
2041 install the PLT entry.
2043 We are modifying the in-memory PLT contents here, so we do not add
2044 in the output_offset of the PLT section. */
2046 bfd_put_64 (splt
->owner
, value
, splt
->contents
+ dyn_h
->plt_offset
);
2047 value
= _bfd_get_gp_value (splt
->output_section
->owner
);
2048 bfd_put_64 (splt
->owner
, value
, splt
->contents
+ dyn_h
->plt_offset
+ 0x8);
2050 /* Create a dynamic IPLT relocation for this entry.
2052 We are creating a relocation in the output file's PLT section,
2053 which is included within the DLT secton. So we do need to include
2054 the PLT's output_offset in the computation of the relocation's
2056 rel
.r_offset
= (dyn_h
->plt_offset
+ splt
->output_offset
2057 + splt
->output_section
->vma
);
2058 rel
.r_info
= ELF64_R_INFO (h
->dynindx
, R_PARISC_IPLT
);
2061 bfd_elf64_swap_reloca_out (splt
->output_section
->owner
, &rel
,
2062 (((Elf64_External_Rela
*)
2064 + spltrel
->reloc_count
));
2065 spltrel
->reloc_count
++;
2068 /* Initialize an external call stub entry if requested. */
2069 if (dyn_h
&& dyn_h
->want_stub
2070 && elf64_hppa_dynamic_symbol_p (dyn_h
->h
, info
))
2074 unsigned int max_offset
;
2076 BFD_ASSERT (stub
!= NULL
)
2078 /* Install the generic stub template.
2080 We are modifying the contents of the stub section, so we do not
2081 need to include the stub section's output_offset here. */
2082 memcpy (stub
->contents
+ dyn_h
->stub_offset
, plt_stub
, sizeof (plt_stub
));
2084 /* Fix up the first ldd instruction.
2086 We are modifying the contents of the STUB section in memory,
2087 so we do not need to include its output offset in this computation.
2089 Note the plt_offset value is the value of the PLT entry relative to
2090 the start of the PLT section. These instructions will reference
2091 data relative to the value of __gp, which may not necessarily have
2092 the same address as the start of the PLT section.
2094 gp_offset contains the offset of __gp within the PLT section. */
2095 value
= dyn_h
->plt_offset
- hppa_info
->gp_offset
;
2097 insn
= bfd_get_32 (stub
->owner
, stub
->contents
+ dyn_h
->stub_offset
);
2098 if (output_bfd
->arch_info
->mach
>= 25)
2100 /* Wide mode allows 16 bit offsets. */
2103 insn
|= re_assemble_16 ((int) value
);
2109 insn
|= re_assemble_14 ((int) value
);
2112 if ((value
& 7) || value
+ max_offset
>= 2*max_offset
- 8)
2114 (*_bfd_error_handler
) (_("stub entry for %s cannot load .plt, dp offset = %ld"),
2120 bfd_put_32 (stub
->owner
, (bfd_vma
) insn
,
2121 stub
->contents
+ dyn_h
->stub_offset
);
2123 /* Fix up the second ldd instruction. */
2125 insn
= bfd_get_32 (stub
->owner
, stub
->contents
+ dyn_h
->stub_offset
+ 8);
2126 if (output_bfd
->arch_info
->mach
>= 25)
2129 insn
|= re_assemble_16 ((int) value
);
2134 insn
|= re_assemble_14 ((int) value
);
2136 bfd_put_32 (stub
->owner
, (bfd_vma
) insn
,
2137 stub
->contents
+ dyn_h
->stub_offset
+ 8);
2143 /* The .opd section contains FPTRs for each function this file
2144 exports. Initialize the FPTR entries. */
2147 elf64_hppa_finalize_opd (dyn_h
, data
)
2148 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
2151 struct bfd_link_info
*info
= (struct bfd_link_info
*)data
;
2152 struct elf64_hppa_link_hash_table
*hppa_info
;
2153 struct elf_link_hash_entry
*h
= dyn_h
? dyn_h
->h
: NULL
;
2157 hppa_info
= elf64_hppa_hash_table (info
);
2158 sopd
= hppa_info
->opd_sec
;
2159 sopdrel
= hppa_info
->opd_rel_sec
;
2161 if (h
&& dyn_h
->want_opd
)
2165 /* The first two words of an .opd entry are zero.
2167 We are modifying the contents of the OPD section in memory, so we
2168 do not need to include its output offset in this computation. */
2169 memset (sopd
->contents
+ dyn_h
->opd_offset
, 0, 16);
2171 value
= (h
->root
.u
.def
.value
2172 + h
->root
.u
.def
.section
->output_section
->vma
2173 + h
->root
.u
.def
.section
->output_offset
);
2175 /* The next word is the address of the function. */
2176 bfd_put_64 (sopd
->owner
, value
, sopd
->contents
+ dyn_h
->opd_offset
+ 16);
2178 /* The last word is our local __gp value. */
2179 value
= _bfd_get_gp_value (sopd
->output_section
->owner
);
2180 bfd_put_64 (sopd
->owner
, value
, sopd
->contents
+ dyn_h
->opd_offset
+ 24);
2183 /* If we are generating a shared library, we must generate EPLT relocations
2184 for each entry in the .opd, even for static functions (they may have
2185 had their address taken). */
2186 if (info
->shared
&& dyn_h
&& dyn_h
->want_opd
)
2188 Elf64_Internal_Rela rel
;
2191 /* We may need to do a relocation against a local symbol, in
2192 which case we have to look up it's dynamic symbol index off
2193 the local symbol hash table. */
2194 if (h
&& h
->dynindx
!= -1)
2195 dynindx
= h
->dynindx
;
2198 = _bfd_elf_link_lookup_local_dynindx (info
, dyn_h
->owner
,
2201 /* The offset of this relocation is the absolute address of the
2202 .opd entry for this symbol. */
2203 rel
.r_offset
= (dyn_h
->opd_offset
+ sopd
->output_offset
2204 + sopd
->output_section
->vma
);
2206 /* If H is non-null, then we have an external symbol.
2208 It is imperative that we use a different dynamic symbol for the
2209 EPLT relocation if the symbol has global scope.
2211 In the dynamic symbol table, the function symbol will have a value
2212 which is address of the function's .opd entry.
2214 Thus, we can not use that dynamic symbol for the EPLT relocation
2215 (if we did, the data in the .opd would reference itself rather
2216 than the actual address of the function). Instead we have to use
2217 a new dynamic symbol which has the same value as the original global
2220 We prefix the original symbol with a "." and use the new symbol in
2221 the EPLT relocation. This new symbol has already been recorded in
2222 the symbol table, we just have to look it up and use it.
2224 We do not have such problems with static functions because we do
2225 not make their addresses in the dynamic symbol table point to
2226 the .opd entry. Ultimately this should be safe since a static
2227 function can not be directly referenced outside of its shared
2230 We do have to play similar games for FPTR relocations in shared
2231 libraries, including those for static symbols. See the FPTR
2232 handling in elf64_hppa_finalize_dynreloc. */
2236 struct elf_link_hash_entry
*nh
;
2238 new_name
= alloca (strlen (h
->root
.root
.string
) + 2);
2240 strcpy (new_name
+ 1, h
->root
.root
.string
);
2242 nh
= elf_link_hash_lookup (elf_hash_table (info
),
2243 new_name
, false, false, false);
2245 /* All we really want from the new symbol is its dynamic
2247 dynindx
= nh
->dynindx
;
2251 rel
.r_info
= ELF64_R_INFO (dynindx
, R_PARISC_EPLT
);
2253 bfd_elf64_swap_reloca_out (sopd
->output_section
->owner
, &rel
,
2254 (((Elf64_External_Rela
*)
2256 + sopdrel
->reloc_count
));
2257 sopdrel
->reloc_count
++;
2262 /* The .dlt section contains addresses for items referenced through the
2263 dlt. Note that we can have a DLTIND relocation for a local symbol, thus
2264 we can not depend on finish_dynamic_symbol to initialize the .dlt. */
2267 elf64_hppa_finalize_dlt (dyn_h
, data
)
2268 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
2271 struct bfd_link_info
*info
= (struct bfd_link_info
*)data
;
2272 struct elf64_hppa_link_hash_table
*hppa_info
;
2273 asection
*sdlt
, *sdltrel
;
2274 struct elf_link_hash_entry
*h
= dyn_h
? dyn_h
->h
: NULL
;
2276 hppa_info
= elf64_hppa_hash_table (info
);
2278 sdlt
= hppa_info
->dlt_sec
;
2279 sdltrel
= hppa_info
->dlt_rel_sec
;
2281 /* H/DYN_H may refer to a local variable and we know it's
2282 address, so there is no need to create a relocation. Just install
2283 the proper value into the DLT, note this shortcut can not be
2284 skipped when building a shared library. */
2285 if (! info
->shared
&& h
&& dyn_h
->want_dlt
)
2289 /* If we had an LTOFF_FPTR style relocation we want the DLT entry
2290 to point to the FPTR entry in the .opd section.
2292 We include the OPD's output offset in this computation as
2293 we are referring to an absolute address in the resulting
2295 if (dyn_h
->want_opd
)
2297 value
= (dyn_h
->opd_offset
2298 + hppa_info
->opd_sec
->output_offset
2299 + hppa_info
->opd_sec
->output_section
->vma
);
2301 else if (h
->root
.u
.def
.section
)
2303 value
= h
->root
.u
.def
.value
+ h
->root
.u
.def
.section
->output_offset
;
2304 if (h
->root
.u
.def
.section
->output_section
)
2305 value
+= h
->root
.u
.def
.section
->output_section
->vma
;
2307 value
+= h
->root
.u
.def
.section
->vma
;
2310 /* We have an undefined function reference. */
2313 /* We do not need to include the output offset of the DLT section
2314 here because we are modifying the in-memory contents. */
2315 bfd_put_64 (sdlt
->owner
, value
, sdlt
->contents
+ dyn_h
->dlt_offset
);
2318 /* Create a relocation for the DLT entry assocated with this symbol.
2319 When building a shared library the symbol does not have to be dynamic. */
2321 && (elf64_hppa_dynamic_symbol_p (dyn_h
->h
, info
) || info
->shared
))
2323 Elf64_Internal_Rela rel
;
2326 /* We may need to do a relocation against a local symbol, in
2327 which case we have to look up it's dynamic symbol index off
2328 the local symbol hash table. */
2329 if (h
&& h
->dynindx
!= -1)
2330 dynindx
= h
->dynindx
;
2333 = _bfd_elf_link_lookup_local_dynindx (info
, dyn_h
->owner
,
2336 /* Create a dynamic relocation for this entry. Do include the output
2337 offset of the DLT entry since we need an absolute address in the
2338 resulting object file. */
2339 rel
.r_offset
= (dyn_h
->dlt_offset
+ sdlt
->output_offset
2340 + sdlt
->output_section
->vma
);
2341 if (h
&& h
->type
== STT_FUNC
)
2342 rel
.r_info
= ELF64_R_INFO (dynindx
, R_PARISC_FPTR64
);
2344 rel
.r_info
= ELF64_R_INFO (dynindx
, R_PARISC_DIR64
);
2347 bfd_elf64_swap_reloca_out (sdlt
->output_section
->owner
, &rel
,
2348 (((Elf64_External_Rela
*)
2350 + sdltrel
->reloc_count
));
2351 sdltrel
->reloc_count
++;
2356 /* Finalize the dynamic relocations. Specifically the FPTR relocations
2357 for dynamic functions used to initialize static data. */
2360 elf64_hppa_finalize_dynreloc (dyn_h
, data
)
2361 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
2364 struct bfd_link_info
*info
= (struct bfd_link_info
*)data
;
2365 struct elf64_hppa_link_hash_table
*hppa_info
;
2366 struct elf_link_hash_entry
*h
;
2369 dynamic_symbol
= elf64_hppa_dynamic_symbol_p (dyn_h
->h
, info
);
2371 if (!dynamic_symbol
&& !info
->shared
)
2374 if (dyn_h
->reloc_entries
)
2376 struct elf64_hppa_dyn_reloc_entry
*rent
;
2379 hppa_info
= elf64_hppa_hash_table (info
);
2382 /* We may need to do a relocation against a local symbol, in
2383 which case we have to look up it's dynamic symbol index off
2384 the local symbol hash table. */
2385 if (h
&& h
->dynindx
!= -1)
2386 dynindx
= h
->dynindx
;
2389 = _bfd_elf_link_lookup_local_dynindx (info
, dyn_h
->owner
,
2392 for (rent
= dyn_h
->reloc_entries
; rent
; rent
= rent
->next
)
2394 Elf64_Internal_Rela rel
;
2396 /* Allocate one iff we are building a shared library, the relocation
2397 isn't a R_PARISC_FPTR64, or we don't want an opd entry. */
2398 if (!info
->shared
&& rent
->type
== R_PARISC_FPTR64
&& dyn_h
->want_opd
)
2401 /* Create a dynamic relocation for this entry.
2403 We need the output offset for the reloc's section because
2404 we are creating an absolute address in the resulting object
2406 rel
.r_offset
= (rent
->offset
+ rent
->sec
->output_offset
2407 + rent
->sec
->output_section
->vma
);
2409 /* An FPTR64 relocation implies that we took the address of
2410 a function and that the function has an entry in the .opd
2411 section. We want the FPTR64 relocation to reference the
2414 We could munge the symbol value in the dynamic symbol table
2415 (in fact we already do for functions with global scope) to point
2416 to the .opd entry. Then we could use that dynamic symbol in
2419 Or we could do something sensible, not munge the symbol's
2420 address and instead just use a different symbol to reference
2421 the .opd entry. At least that seems sensible until you
2422 realize there's no local dynamic symbols we can use for that
2423 purpose. Thus the hair in the check_relocs routine.
2425 We use a section symbol recorded by check_relocs as the
2426 base symbol for the relocation. The addend is the difference
2427 between the section symbol and the address of the .opd entry. */
2428 if (info
->shared
&& rent
->type
== R_PARISC_FPTR64
&& dyn_h
->want_opd
)
2430 bfd_vma value
, value2
;
2432 /* First compute the address of the opd entry for this symbol. */
2433 value
= (dyn_h
->opd_offset
2434 + hppa_info
->opd_sec
->output_section
->vma
2435 + hppa_info
->opd_sec
->output_offset
);
2437 /* Compute the value of the start of the section with
2439 value2
= (rent
->sec
->output_section
->vma
2440 + rent
->sec
->output_offset
);
2442 /* Compute the difference between the start of the section
2443 with the relocation and the opd entry. */
2446 /* The result becomes the addend of the relocation. */
2447 rel
.r_addend
= value
;
2449 /* The section symbol becomes the symbol for the dynamic
2452 = _bfd_elf_link_lookup_local_dynindx (info
,
2457 rel
.r_addend
= rent
->addend
;
2459 rel
.r_info
= ELF64_R_INFO (dynindx
, rent
->type
);
2461 bfd_elf64_swap_reloca_out (hppa_info
->other_rel_sec
->output_section
->owner
,
2463 (((Elf64_External_Rela
*)
2464 hppa_info
->other_rel_sec
->contents
)
2465 + hppa_info
->other_rel_sec
->reloc_count
));
2466 hppa_info
->other_rel_sec
->reloc_count
++;
2473 /* Finish up the dynamic sections. */
2476 elf64_hppa_finish_dynamic_sections (output_bfd
, info
)
2478 struct bfd_link_info
*info
;
2482 struct elf64_hppa_link_hash_table
*hppa_info
;
2484 hppa_info
= elf64_hppa_hash_table (info
);
2486 /* Finalize the contents of the .opd section. */
2487 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
2488 elf64_hppa_finalize_opd
,
2491 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
2492 elf64_hppa_finalize_dynreloc
,
2495 /* Finalize the contents of the .dlt section. */
2496 dynobj
= elf_hash_table (info
)->dynobj
;
2497 /* Finalize the contents of the .dlt section. */
2498 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
2499 elf64_hppa_finalize_dlt
,
2502 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
2504 if (elf_hash_table (info
)->dynamic_sections_created
)
2506 Elf64_External_Dyn
*dyncon
, *dynconend
;
2508 BFD_ASSERT (sdyn
!= NULL
);
2510 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
2511 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
2512 for (; dyncon
< dynconend
; dyncon
++)
2514 Elf_Internal_Dyn dyn
;
2517 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
2524 case DT_HP_LOAD_MAP
:
2525 /* Compute the absolute address of 16byte scratchpad area
2526 for the dynamic linker.
2528 By convention the linker script will allocate the scratchpad
2529 area at the start of the .data section. So all we have to
2530 to is find the start of the .data section. */
2531 s
= bfd_get_section_by_name (output_bfd
, ".data");
2532 dyn
.d_un
.d_ptr
= s
->vma
;
2533 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2537 /* HP's use PLTGOT to set the GOT register. */
2538 dyn
.d_un
.d_ptr
= _bfd_get_gp_value (output_bfd
);
2539 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2543 s
= hppa_info
->plt_rel_sec
;
2544 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
2545 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2549 s
= hppa_info
->plt_rel_sec
;
2550 dyn
.d_un
.d_val
= s
->_raw_size
;
2551 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2555 s
= hppa_info
->other_rel_sec
;
2557 s
= hppa_info
->dlt_rel_sec
;
2558 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
2559 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2563 s
= hppa_info
->other_rel_sec
;
2564 dyn
.d_un
.d_val
= s
->_raw_size
;
2565 s
= hppa_info
->dlt_rel_sec
;
2566 dyn
.d_un
.d_val
+= s
->_raw_size
;
2567 s
= hppa_info
->opd_rel_sec
;
2568 dyn
.d_un
.d_val
+= s
->_raw_size
;
2569 /* There is some question about whether or not the size of
2570 the PLT relocs should be included here. HP's tools do
2571 it, so we'll emulate them. */
2572 s
= hppa_info
->plt_rel_sec
;
2573 dyn
.d_un
.d_val
+= s
->_raw_size
;
2574 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2584 /* Return the number of additional phdrs we will need.
2586 The generic ELF code only creates PT_PHDRs for executables. The HP
2587 dynamic linker requires PT_PHDRs for dynamic libraries too.
2589 This routine indicates that the backend needs one additional program
2590 header for that case.
2592 Note we do not have access to the link info structure here, so we have
2593 to guess whether or not we are building a shared library based on the
2594 existence of a .interp section. */
2597 elf64_hppa_additional_program_headers (abfd
)
2602 /* If we are creating a shared library, then we have to create a
2603 PT_PHDR segment. HP's dynamic linker chokes without it. */
2604 s
= bfd_get_section_by_name (abfd
, ".interp");
2610 /* Allocate and initialize any program headers required by this
2613 The generic ELF code only creates PT_PHDRs for executables. The HP
2614 dynamic linker requires PT_PHDRs for dynamic libraries too.
2616 This allocates the PT_PHDR and initializes it in a manner suitable
2619 Note we do not have access to the link info structure here, so we have
2620 to guess whether or not we are building a shared library based on the
2621 existence of a .interp section. */
2624 elf64_hppa_modify_segment_map (abfd
)
2627 struct elf_segment_map
*m
;
2630 s
= bfd_get_section_by_name (abfd
, ".interp");
2633 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
2634 if (m
->p_type
== PT_PHDR
)
2638 m
= ((struct elf_segment_map
*)
2639 bfd_zalloc (abfd
, (bfd_size_type
) sizeof *m
));
2643 m
->p_type
= PT_PHDR
;
2644 m
->p_flags
= PF_R
| PF_X
;
2645 m
->p_flags_valid
= 1;
2646 m
->p_paddr_valid
= 1;
2647 m
->includes_phdrs
= 1;
2649 m
->next
= elf_tdata (abfd
)->segment_map
;
2650 elf_tdata (abfd
)->segment_map
= m
;
2654 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
2655 if (m
->p_type
== PT_LOAD
)
2659 for (i
= 0; i
< m
->count
; i
++)
2661 /* The code "hint" is not really a hint. It is a requirement
2662 for certain versions of the HP dynamic linker. Worse yet,
2663 it must be set even if the shared library does not have
2664 any code in its "text" segment (thus the check for .hash
2665 to catch this situation). */
2666 if (m
->sections
[i
]->flags
& SEC_CODE
2667 || (strcmp (m
->sections
[i
]->name
, ".hash") == 0))
2668 m
->p_flags
|= (PF_X
| PF_HP_CODE
);
2675 /* Called when writing out an object file to decide the type of a
2678 elf64_hppa_elf_get_symbol_type (elf_sym
, type
)
2679 Elf_Internal_Sym
*elf_sym
;
2682 if (ELF_ST_TYPE (elf_sym
->st_info
) == STT_PARISC_MILLI
)
2683 return STT_PARISC_MILLI
;
2688 /* The hash bucket size is the standard one, namely 4. */
2690 const struct elf_size_info hppa64_elf_size_info
=
2692 sizeof (Elf64_External_Ehdr
),
2693 sizeof (Elf64_External_Phdr
),
2694 sizeof (Elf64_External_Shdr
),
2695 sizeof (Elf64_External_Rel
),
2696 sizeof (Elf64_External_Rela
),
2697 sizeof (Elf64_External_Sym
),
2698 sizeof (Elf64_External_Dyn
),
2699 sizeof (Elf_External_Note
),
2703 ELFCLASS64
, EV_CURRENT
,
2704 bfd_elf64_write_out_phdrs
,
2705 bfd_elf64_write_shdrs_and_ehdr
,
2706 bfd_elf64_write_relocs
,
2707 bfd_elf64_swap_symbol_in
,
2708 bfd_elf64_swap_symbol_out
,
2709 bfd_elf64_slurp_reloc_table
,
2710 bfd_elf64_slurp_symbol_table
,
2711 bfd_elf64_swap_dyn_in
,
2712 bfd_elf64_swap_dyn_out
,
2719 #define TARGET_BIG_SYM bfd_elf64_hppa_vec
2720 #define TARGET_BIG_NAME "elf64-hppa"
2721 #define ELF_ARCH bfd_arch_hppa
2722 #define ELF_MACHINE_CODE EM_PARISC
2723 /* This is not strictly correct. The maximum page size for PA2.0 is
2724 64M. But everything still uses 4k. */
2725 #define ELF_MAXPAGESIZE 0x1000
2726 #define bfd_elf64_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
2727 #define bfd_elf64_bfd_is_local_label_name elf_hppa_is_local_label_name
2728 #define elf_info_to_howto elf_hppa_info_to_howto
2729 #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel
2731 #define elf_backend_section_from_shdr elf64_hppa_section_from_shdr
2732 #define elf_backend_object_p elf64_hppa_object_p
2733 #define elf_backend_final_write_processing \
2734 elf_hppa_final_write_processing
2735 #define elf_backend_fake_sections elf_hppa_fake_sections
2736 #define elf_backend_add_symbol_hook elf_hppa_add_symbol_hook
2738 #define elf_backend_relocate_section elf_hppa_relocate_section
2740 #define bfd_elf64_bfd_final_link elf_hppa_final_link
2742 #define elf_backend_create_dynamic_sections \
2743 elf64_hppa_create_dynamic_sections
2744 #define elf_backend_post_process_headers elf64_hppa_post_process_headers
2746 #define elf_backend_adjust_dynamic_symbol \
2747 elf64_hppa_adjust_dynamic_symbol
2749 #define elf_backend_size_dynamic_sections \
2750 elf64_hppa_size_dynamic_sections
2752 #define elf_backend_finish_dynamic_symbol \
2753 elf64_hppa_finish_dynamic_symbol
2754 #define elf_backend_finish_dynamic_sections \
2755 elf64_hppa_finish_dynamic_sections
2757 /* Stuff for the BFD linker: */
2758 #define bfd_elf64_bfd_link_hash_table_create \
2759 elf64_hppa_hash_table_create
2761 #define elf_backend_check_relocs \
2762 elf64_hppa_check_relocs
2764 #define elf_backend_size_info \
2765 hppa64_elf_size_info
2767 #define elf_backend_additional_program_headers \
2768 elf64_hppa_additional_program_headers
2770 #define elf_backend_modify_segment_map \
2771 elf64_hppa_modify_segment_map
2773 #define elf_backend_link_output_symbol_hook \
2774 elf64_hppa_link_output_symbol_hook
2776 #define elf_backend_want_got_plt 0
2777 #define elf_backend_plt_readonly 0
2778 #define elf_backend_want_plt_sym 0
2779 #define elf_backend_got_header_size 0
2780 #define elf_backend_plt_header_size 0
2781 #define elf_backend_type_change_ok true
2782 #define elf_backend_get_symbol_type elf64_hppa_elf_get_symbol_type
2784 #include "elf64-target.h"
2786 #undef TARGET_BIG_SYM
2787 #define TARGET_BIG_SYM bfd_elf64_hppa_linux_vec
2788 #undef TARGET_BIG_NAME
2789 #define TARGET_BIG_NAME "elf64-hppa-linux"
2791 #define INCLUDED_TARGET_FILE 1
2792 #include "elf64-target.h"