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
*, 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_size_dynamic_sections
199 PARAMS ((bfd
*, struct bfd_link_info
*));
201 static boolean elf64_hppa_link_output_symbol_hook
202 PARAMS ((bfd
*abfd
, struct bfd_link_info
*, const char *,
203 Elf_Internal_Sym
*, asection
*input_sec
));
205 static boolean elf64_hppa_finish_dynamic_symbol
206 PARAMS ((bfd
*, struct bfd_link_info
*,
207 struct elf_link_hash_entry
*, Elf_Internal_Sym
*));
209 static int elf64_hppa_additional_program_headers
PARAMS ((bfd
*));
211 static boolean elf64_hppa_modify_segment_map
PARAMS ((bfd
*));
213 static boolean elf64_hppa_finish_dynamic_sections
214 PARAMS ((bfd
*, struct bfd_link_info
*));
216 static boolean elf64_hppa_check_relocs
217 PARAMS ((bfd
*, struct bfd_link_info
*,
218 asection
*, const Elf_Internal_Rela
*));
220 static boolean elf64_hppa_dynamic_symbol_p
221 PARAMS ((struct elf_link_hash_entry
*, struct bfd_link_info
*));
223 static boolean elf64_hppa_mark_exported_functions
224 PARAMS ((struct elf_link_hash_entry
*, PTR
));
226 static boolean elf64_hppa_finalize_opd
227 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
229 static boolean elf64_hppa_finalize_dlt
230 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
232 static boolean allocate_global_data_dlt
233 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
235 static boolean allocate_global_data_plt
236 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
238 static boolean allocate_global_data_stub
239 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
241 static boolean allocate_global_data_opd
242 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
244 static boolean get_reloc_section
245 PARAMS ((bfd
*, struct elf64_hppa_link_hash_table
*, asection
*));
247 static boolean count_dyn_reloc
248 PARAMS ((bfd
*, struct elf64_hppa_dyn_hash_entry
*,
249 int, asection
*, int, bfd_vma
, bfd_vma
));
251 static boolean allocate_dynrel_entries
252 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
254 static boolean elf64_hppa_finalize_dynreloc
255 PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
257 static boolean get_opd
258 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf64_hppa_link_hash_table
*));
260 static boolean get_plt
261 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf64_hppa_link_hash_table
*));
263 static boolean get_dlt
264 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf64_hppa_link_hash_table
*));
266 static boolean get_stub
267 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf64_hppa_link_hash_table
*));
269 static int elf64_hppa_elf_get_symbol_type
270 PARAMS ((Elf_Internal_Sym
*, int));
273 elf64_hppa_dyn_hash_table_init (ht
, abfd
, new)
274 struct elf64_hppa_dyn_hash_table
*ht
;
275 bfd
*abfd ATTRIBUTE_UNUSED
;
276 new_hash_entry_func
new;
278 memset (ht
, 0, sizeof (*ht
));
279 return bfd_hash_table_init (&ht
->root
, new);
282 static struct bfd_hash_entry
*
283 elf64_hppa_new_dyn_hash_entry (entry
, table
, string
)
284 struct bfd_hash_entry
*entry
;
285 struct bfd_hash_table
*table
;
288 struct elf64_hppa_dyn_hash_entry
*ret
;
289 ret
= (struct elf64_hppa_dyn_hash_entry
*) entry
;
291 /* Allocate the structure if it has not already been allocated by a
294 ret
= bfd_hash_allocate (table
, sizeof (*ret
));
299 /* Initialize our local data. All zeros, and definitely easier
300 than setting 8 bit fields. */
301 memset (ret
, 0, sizeof (*ret
));
303 /* Call the allocation method of the superclass. */
304 ret
= ((struct elf64_hppa_dyn_hash_entry
*)
305 bfd_hash_newfunc ((struct bfd_hash_entry
*) ret
, table
, string
));
310 /* Create the derived linker hash table. The PA64 ELF port uses this
311 derived hash table to keep information specific to the PA ElF
312 linker (without using static variables). */
314 static struct bfd_link_hash_table
*
315 elf64_hppa_hash_table_create (abfd
)
318 struct elf64_hppa_link_hash_table
*ret
;
320 ret
= bfd_zalloc (abfd
, (bfd_size_type
) sizeof (*ret
));
323 if (!_bfd_elf_link_hash_table_init (&ret
->root
, abfd
,
324 _bfd_elf_link_hash_newfunc
))
326 bfd_release (abfd
, ret
);
330 if (!elf64_hppa_dyn_hash_table_init (&ret
->dyn_hash_table
, abfd
,
331 elf64_hppa_new_dyn_hash_entry
))
333 return &ret
->root
.root
;
336 /* Look up an entry in a PA64 ELF linker hash table. */
338 static struct elf64_hppa_dyn_hash_entry
*
339 elf64_hppa_dyn_hash_lookup(table
, string
, create
, copy
)
340 struct elf64_hppa_dyn_hash_table
*table
;
342 boolean create
, copy
;
344 return ((struct elf64_hppa_dyn_hash_entry
*)
345 bfd_hash_lookup (&table
->root
, string
, create
, copy
));
348 /* Traverse a PA64 ELF linker hash table. */
351 elf64_hppa_dyn_hash_traverse (table
, func
, info
)
352 struct elf64_hppa_dyn_hash_table
*table
;
353 boolean (*func
) PARAMS ((struct elf64_hppa_dyn_hash_entry
*, PTR
));
358 (boolean (*) PARAMS ((struct bfd_hash_entry
*, PTR
))) func
,
362 /* Return nonzero if ABFD represents a PA2.0 ELF64 file.
364 Additionally we set the default architecture and machine. */
366 elf64_hppa_object_p (abfd
)
369 Elf_Internal_Ehdr
* i_ehdrp
;
372 i_ehdrp
= elf_elfheader (abfd
);
373 if (strcmp (bfd_get_target (abfd
), "elf64-hppa-linux") == 0)
375 if (i_ehdrp
->e_ident
[EI_OSABI
] != ELFOSABI_LINUX
)
380 if (i_ehdrp
->e_ident
[EI_OSABI
] != ELFOSABI_HPUX
)
384 flags
= i_ehdrp
->e_flags
;
385 switch (flags
& (EF_PARISC_ARCH
| EF_PARISC_WIDE
))
388 return bfd_default_set_arch_mach (abfd
, bfd_arch_hppa
, 10);
390 return bfd_default_set_arch_mach (abfd
, bfd_arch_hppa
, 11);
392 return bfd_default_set_arch_mach (abfd
, bfd_arch_hppa
, 20);
393 case EFA_PARISC_2_0
| EF_PARISC_WIDE
:
394 return bfd_default_set_arch_mach (abfd
, bfd_arch_hppa
, 25);
396 /* Don't be fussy. */
400 /* Given section type (hdr->sh_type), return a boolean indicating
401 whether or not the section is an elf64-hppa specific section. */
403 elf64_hppa_section_from_shdr (abfd
, hdr
, name
)
405 Elf64_Internal_Shdr
*hdr
;
410 switch (hdr
->sh_type
)
413 if (strcmp (name
, ".PARISC.archext") != 0)
416 case SHT_PARISC_UNWIND
:
417 if (strcmp (name
, ".PARISC.unwind") != 0)
421 case SHT_PARISC_ANNOT
:
426 if (! _bfd_elf_make_section_from_shdr (abfd
, hdr
, name
))
428 newsect
= hdr
->bfd_section
;
433 /* Construct a string for use in the elf64_hppa_dyn_hash_table. The
434 name describes what was once potentially anonymous memory. We
435 allocate memory as necessary, possibly reusing PBUF/PLEN. */
438 get_dyn_name (sec
, h
, rel
, pbuf
, plen
)
440 struct elf_link_hash_entry
*h
;
441 const Elf_Internal_Rela
*rel
;
449 if (h
&& rel
->r_addend
== 0)
450 return h
->root
.root
.string
;
453 nlen
= strlen (h
->root
.root
.string
);
455 nlen
= 8 + 1 + sizeof (rel
->r_info
) * 2 - 8;
456 tlen
= nlen
+ 1 + sizeof (rel
->r_addend
) * 2 + 1;
464 *pbuf
= buf
= malloc (tlen
);
472 memcpy (buf
, h
->root
.root
.string
, nlen
);
474 sprintf_vma (buf
+ nlen
, rel
->r_addend
);
478 nlen
= sprintf (buf
, "%x:%lx",
479 sec
->id
& 0xffffffff,
480 (long) ELF64_R_SYM (rel
->r_info
));
484 sprintf_vma (buf
+ nlen
, rel
->r_addend
);
491 /* SEC is a section containing relocs for an input BFD when linking; return
492 a suitable section for holding relocs in the output BFD for a link. */
495 get_reloc_section (abfd
, hppa_info
, sec
)
497 struct elf64_hppa_link_hash_table
*hppa_info
;
500 const char *srel_name
;
504 srel_name
= (bfd_elf_string_from_elf_section
505 (abfd
, elf_elfheader(abfd
)->e_shstrndx
,
506 elf_section_data(sec
)->rel_hdr
.sh_name
));
507 if (srel_name
== NULL
)
510 BFD_ASSERT ((strncmp (srel_name
, ".rela", 5) == 0
511 && strcmp (bfd_get_section_name (abfd
, sec
),
513 || (strncmp (srel_name
, ".rel", 4) == 0
514 && strcmp (bfd_get_section_name (abfd
, sec
),
517 dynobj
= hppa_info
->root
.dynobj
;
519 hppa_info
->root
.dynobj
= dynobj
= abfd
;
521 srel
= bfd_get_section_by_name (dynobj
, srel_name
);
524 srel
= bfd_make_section (dynobj
, srel_name
);
526 || !bfd_set_section_flags (dynobj
, srel
,
533 || !bfd_set_section_alignment (dynobj
, srel
, 3))
537 hppa_info
->other_rel_sec
= srel
;
541 /* Add a new entry to the list of dynamic relocations against DYN_H.
543 We use this to keep a record of all the FPTR relocations against a
544 particular symbol so that we can create FPTR relocations in the
548 count_dyn_reloc (abfd
, dyn_h
, type
, sec
, sec_symndx
, offset
, addend
)
550 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
557 struct elf64_hppa_dyn_reloc_entry
*rent
;
559 rent
= (struct elf64_hppa_dyn_reloc_entry
*)
560 bfd_alloc (abfd
, (bfd_size_type
) sizeof (*rent
));
564 rent
->next
= dyn_h
->reloc_entries
;
567 rent
->sec_symndx
= sec_symndx
;
568 rent
->offset
= offset
;
569 rent
->addend
= addend
;
570 dyn_h
->reloc_entries
= rent
;
575 /* Scan the RELOCS and record the type of dynamic entries that each
576 referenced symbol needs. */
579 elf64_hppa_check_relocs (abfd
, info
, sec
, relocs
)
581 struct bfd_link_info
*info
;
583 const Elf_Internal_Rela
*relocs
;
585 struct elf64_hppa_link_hash_table
*hppa_info
;
586 const Elf_Internal_Rela
*relend
;
587 Elf_Internal_Shdr
*symtab_hdr
;
588 Elf_Internal_Shdr
*shndx_hdr
;
589 const Elf_Internal_Rela
*rel
;
590 asection
*dlt
, *plt
, *stubs
;
595 if (info
->relocateable
)
598 /* If this is the first dynamic object found in the link, create
599 the special sections required for dynamic linking. */
600 if (! elf_hash_table (info
)->dynamic_sections_created
)
602 if (! bfd_elf64_link_create_dynamic_sections (abfd
, info
))
606 hppa_info
= elf64_hppa_hash_table (info
);
607 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
609 /* If necessary, build a new table holding section symbols indices
610 for this BFD. This is disgusting. */
612 if (info
->shared
&& hppa_info
->section_syms_bfd
!= abfd
)
615 unsigned int highest_shndx
;
616 Elf_Internal_Sym
*local_syms
, *isym
;
617 Elf64_External_Sym
*ext_syms
, *esym
;
618 Elf_External_Sym_Shndx
*shndx_buf
, *shndx
;
621 /* We're done with the old cache of section index to section symbol
622 index information. Free it.
624 ?!? Note we leak the last section_syms array. Presumably we
625 could free it in one of the later routines in this file. */
626 if (hppa_info
->section_syms
)
627 free (hppa_info
->section_syms
);
629 /* Allocate memory for the internal and external symbols. */
630 amt
= symtab_hdr
->sh_info
;
631 amt
*= sizeof (Elf_Internal_Sym
);
632 local_syms
= (Elf_Internal_Sym
*) bfd_malloc (amt
);
633 if (local_syms
== NULL
)
636 amt
= symtab_hdr
->sh_info
;
637 amt
*= sizeof (Elf64_External_Sym
);
638 ext_syms
= (Elf64_External_Sym
*) bfd_malloc (amt
);
639 if (ext_syms
== NULL
)
645 /* Read in the local symbols. */
646 if (bfd_seek (abfd
, symtab_hdr
->sh_offset
, SEEK_SET
) != 0
647 || bfd_bread (ext_syms
, amt
, abfd
) != amt
)
655 shndx_hdr
= &elf_tdata (abfd
)->symtab_shndx_hdr
;
656 if (shndx_hdr
->sh_size
!= 0)
658 amt
= symtab_hdr
->sh_info
;
659 amt
*= sizeof (Elf_External_Sym_Shndx
);
660 shndx_buf
= (Elf_External_Sym_Shndx
*) bfd_malloc (amt
);
661 if (shndx_buf
== NULL
)
668 if (bfd_seek (abfd
, shndx_hdr
->sh_offset
, SEEK_SET
) != 0
669 || bfd_bread (shndx_buf
, amt
, abfd
) != amt
)
678 /* Swap in the local symbols, also record the highest section index
679 referenced by the local symbols. */
681 for (i
= 0, isym
= local_syms
, esym
= ext_syms
, shndx
= shndx_buf
;
682 i
< symtab_hdr
->sh_info
;
683 i
++, esym
++, isym
++, shndx
= (shndx
!= NULL
? shndx
+ 1 : NULL
))
685 bfd_elf64_swap_symbol_in (abfd
, esym
, shndx
, isym
);
686 if (isym
->st_shndx
> highest_shndx
)
687 highest_shndx
= isym
->st_shndx
;
690 /* Now we can free the external symbols. */
694 /* Allocate an array to hold the section index to section symbol index
695 mapping. Bump by one since we start counting at zero. */
699 hppa_info
->section_syms
= (int *) bfd_malloc (amt
);
701 /* Now walk the local symbols again. If we find a section symbol,
702 record the index of the symbol into the section_syms array. */
703 for (isym
= local_syms
, i
= 0; i
< symtab_hdr
->sh_info
; i
++, isym
++)
705 if (ELF_ST_TYPE (isym
->st_info
) == STT_SECTION
)
706 hppa_info
->section_syms
[isym
->st_shndx
] = i
;
709 /* We are finished with the local symbols. Get rid of them. */
712 /* Record which BFD we built the section_syms mapping for. */
713 hppa_info
->section_syms_bfd
= abfd
;
716 /* Record the symbol index for this input section. We may need it for
717 relocations when building shared libraries. When not building shared
718 libraries this value is never really used, but assign it to zero to
719 prevent out of bounds memory accesses in other routines. */
722 sec_symndx
= _bfd_elf_section_from_bfd_section (abfd
, sec
);
724 /* If we did not find a section symbol for this section, then
725 something went terribly wrong above. */
726 if (sec_symndx
== -1)
729 sec_symndx
= hppa_info
->section_syms
[sec_symndx
];
734 dlt
= plt
= stubs
= NULL
;
738 relend
= relocs
+ sec
->reloc_count
;
739 for (rel
= relocs
; rel
< relend
; ++rel
)
749 struct elf_link_hash_entry
*h
= NULL
;
750 unsigned long r_symndx
= ELF64_R_SYM (rel
->r_info
);
751 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
753 const char *addr_name
;
754 boolean maybe_dynamic
;
755 int dynrel_type
= R_PARISC_NONE
;
756 static reloc_howto_type
*howto
;
758 if (r_symndx
>= symtab_hdr
->sh_info
)
760 /* We're dealing with a global symbol -- find its hash entry
761 and mark it as being referenced. */
762 long indx
= r_symndx
- symtab_hdr
->sh_info
;
763 h
= elf_sym_hashes (abfd
)[indx
];
764 while (h
->root
.type
== bfd_link_hash_indirect
765 || h
->root
.type
== bfd_link_hash_warning
)
766 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
768 h
->elf_link_hash_flags
|= ELF_LINK_HASH_REF_REGULAR
;
771 /* We can only get preliminary data on whether a symbol is
772 locally or externally defined, as not all of the input files
773 have yet been processed. Do something with what we know, as
774 this may help reduce memory usage and processing time later. */
775 maybe_dynamic
= false;
776 if (h
&& ((info
->shared
777 && (!info
->symbolic
|| info
->allow_shlib_undefined
) )
778 || ! (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
)
779 || h
->root
.type
== bfd_link_hash_defweak
))
780 maybe_dynamic
= true;
782 howto
= elf_hppa_howto_table
+ ELF64_R_TYPE (rel
->r_info
);
786 /* These are simple indirect references to symbols through the
787 DLT. We need to create a DLT entry for any symbols which
788 appears in a DLTIND relocation. */
789 case R_PARISC_DLTIND21L
:
790 case R_PARISC_DLTIND14R
:
791 case R_PARISC_DLTIND14F
:
792 case R_PARISC_DLTIND14WR
:
793 case R_PARISC_DLTIND14DR
:
794 need_entry
= NEED_DLT
;
797 /* ?!? These need a DLT entry. But I have no idea what to do with
798 the "link time TP value. */
799 case R_PARISC_LTOFF_TP21L
:
800 case R_PARISC_LTOFF_TP14R
:
801 case R_PARISC_LTOFF_TP14F
:
802 case R_PARISC_LTOFF_TP64
:
803 case R_PARISC_LTOFF_TP14WR
:
804 case R_PARISC_LTOFF_TP14DR
:
805 case R_PARISC_LTOFF_TP16F
:
806 case R_PARISC_LTOFF_TP16WF
:
807 case R_PARISC_LTOFF_TP16DF
:
808 need_entry
= NEED_DLT
;
811 /* These are function calls. Depending on their precise target we
812 may need to make a stub for them. The stub uses the PLT, so we
813 need to create PLT entries for these symbols too. */
814 case R_PARISC_PCREL12F
:
815 case R_PARISC_PCREL17F
:
816 case R_PARISC_PCREL22F
:
817 case R_PARISC_PCREL32
:
818 case R_PARISC_PCREL64
:
819 case R_PARISC_PCREL21L
:
820 case R_PARISC_PCREL17R
:
821 case R_PARISC_PCREL17C
:
822 case R_PARISC_PCREL14R
:
823 case R_PARISC_PCREL14F
:
824 case R_PARISC_PCREL22C
:
825 case R_PARISC_PCREL14WR
:
826 case R_PARISC_PCREL14DR
:
827 case R_PARISC_PCREL16F
:
828 case R_PARISC_PCREL16WF
:
829 case R_PARISC_PCREL16DF
:
830 need_entry
= (NEED_PLT
| NEED_STUB
);
833 case R_PARISC_PLTOFF21L
:
834 case R_PARISC_PLTOFF14R
:
835 case R_PARISC_PLTOFF14F
:
836 case R_PARISC_PLTOFF14WR
:
837 case R_PARISC_PLTOFF14DR
:
838 case R_PARISC_PLTOFF16F
:
839 case R_PARISC_PLTOFF16WF
:
840 case R_PARISC_PLTOFF16DF
:
841 need_entry
= (NEED_PLT
);
845 if (info
->shared
|| maybe_dynamic
)
846 need_entry
= (NEED_DYNREL
);
847 dynrel_type
= R_PARISC_DIR64
;
850 /* This is an indirect reference through the DLT to get the address
851 of a OPD descriptor. Thus we need to make a DLT entry that points
853 case R_PARISC_LTOFF_FPTR21L
:
854 case R_PARISC_LTOFF_FPTR14R
:
855 case R_PARISC_LTOFF_FPTR14WR
:
856 case R_PARISC_LTOFF_FPTR14DR
:
857 case R_PARISC_LTOFF_FPTR32
:
858 case R_PARISC_LTOFF_FPTR64
:
859 case R_PARISC_LTOFF_FPTR16F
:
860 case R_PARISC_LTOFF_FPTR16WF
:
861 case R_PARISC_LTOFF_FPTR16DF
:
862 if (info
->shared
|| maybe_dynamic
)
863 need_entry
= (NEED_DLT
| NEED_OPD
);
865 need_entry
= (NEED_DLT
| NEED_OPD
);
866 dynrel_type
= R_PARISC_FPTR64
;
869 /* This is a simple OPD entry. */
870 case R_PARISC_FPTR64
:
871 if (info
->shared
|| maybe_dynamic
)
872 need_entry
= (NEED_OPD
| NEED_DYNREL
);
874 need_entry
= (NEED_OPD
);
875 dynrel_type
= R_PARISC_FPTR64
;
878 /* Add more cases as needed. */
884 /* Collect a canonical name for this address. */
885 addr_name
= get_dyn_name (sec
, h
, rel
, &buf
, &buf_len
);
887 /* Collect the canonical entry data for this address. */
888 dyn_h
= elf64_hppa_dyn_hash_lookup (&hppa_info
->dyn_hash_table
,
889 addr_name
, true, true);
892 /* Stash away enough information to be able to find this symbol
893 regardless of whether or not it is local or global. */
896 dyn_h
->sym_indx
= r_symndx
;
898 /* ?!? We may need to do some error checking in here. */
899 /* Create what's needed. */
900 if (need_entry
& NEED_DLT
)
902 if (! hppa_info
->dlt_sec
903 && ! get_dlt (abfd
, info
, hppa_info
))
908 if (need_entry
& NEED_PLT
)
910 if (! hppa_info
->plt_sec
911 && ! get_plt (abfd
, info
, hppa_info
))
916 if (need_entry
& NEED_STUB
)
918 if (! hppa_info
->stub_sec
919 && ! get_stub (abfd
, info
, hppa_info
))
921 dyn_h
->want_stub
= 1;
924 if (need_entry
& NEED_OPD
)
926 if (! hppa_info
->opd_sec
927 && ! get_opd (abfd
, info
, hppa_info
))
932 /* FPTRs are not allocated by the dynamic linker for PA64, though
933 it is possible that will change in the future. */
935 /* This could be a local function that had its address taken, in
936 which case H will be NULL. */
938 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
941 /* Add a new dynamic relocation to the chain of dynamic
942 relocations for this symbol. */
943 if ((need_entry
& NEED_DYNREL
) && (sec
->flags
& SEC_ALLOC
))
945 if (! hppa_info
->other_rel_sec
946 && ! get_reloc_section (abfd
, hppa_info
, sec
))
949 if (!count_dyn_reloc (abfd
, dyn_h
, dynrel_type
, sec
,
950 sec_symndx
, rel
->r_offset
, rel
->r_addend
))
953 /* If we are building a shared library and we just recorded
954 a dynamic R_PARISC_FPTR64 relocation, then make sure the
955 section symbol for this section ends up in the dynamic
957 if (info
->shared
&& dynrel_type
== R_PARISC_FPTR64
958 && ! (_bfd_elf64_link_record_local_dynamic_symbol
959 (info
, abfd
, sec_symndx
)))
974 struct elf64_hppa_allocate_data
976 struct bfd_link_info
*info
;
980 /* Should we do dynamic things to this symbol? */
983 elf64_hppa_dynamic_symbol_p (h
, info
)
984 struct elf_link_hash_entry
*h
;
985 struct bfd_link_info
*info
;
990 while (h
->root
.type
== bfd_link_hash_indirect
991 || h
->root
.type
== bfd_link_hash_warning
)
992 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
994 if (h
->dynindx
== -1)
997 if (h
->root
.type
== bfd_link_hash_undefweak
998 || h
->root
.type
== bfd_link_hash_defweak
)
1001 if (h
->root
.root
.string
[0] == '$' && h
->root
.root
.string
[1] == '$')
1004 if ((info
->shared
&& (!info
->symbolic
|| info
->allow_shlib_undefined
))
1005 || ((h
->elf_link_hash_flags
1006 & (ELF_LINK_HASH_DEF_DYNAMIC
| ELF_LINK_HASH_REF_REGULAR
))
1007 == (ELF_LINK_HASH_DEF_DYNAMIC
| ELF_LINK_HASH_REF_REGULAR
)))
1013 /* Mark all funtions exported by this file so that we can later allocate
1014 entries in .opd for them. */
1017 elf64_hppa_mark_exported_functions (h
, data
)
1018 struct elf_link_hash_entry
*h
;
1021 struct bfd_link_info
*info
= (struct bfd_link_info
*)data
;
1022 struct elf64_hppa_link_hash_table
*hppa_info
;
1024 hppa_info
= elf64_hppa_hash_table (info
);
1026 if (h
->root
.type
== bfd_link_hash_warning
)
1027 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1030 && (h
->root
.type
== bfd_link_hash_defined
1031 || h
->root
.type
== bfd_link_hash_defweak
)
1032 && h
->root
.u
.def
.section
->output_section
!= NULL
1033 && h
->type
== STT_FUNC
)
1035 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1037 /* Add this symbol to the PA64 linker hash table. */
1038 dyn_h
= elf64_hppa_dyn_hash_lookup (&hppa_info
->dyn_hash_table
,
1039 h
->root
.root
.string
, true, true);
1043 if (! hppa_info
->opd_sec
1044 && ! get_opd (hppa_info
->root
.dynobj
, info
, hppa_info
))
1047 dyn_h
->want_opd
= 1;
1048 /* Put a flag here for output_symbol_hook. */
1049 dyn_h
->st_shndx
= -1;
1050 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
1056 /* Allocate space for a DLT entry. */
1059 allocate_global_data_dlt (dyn_h
, data
)
1060 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1063 struct elf64_hppa_allocate_data
*x
= (struct elf64_hppa_allocate_data
*)data
;
1065 if (dyn_h
->want_dlt
)
1067 struct elf_link_hash_entry
*h
= dyn_h
->h
;
1069 if (x
->info
->shared
)
1071 /* Possibly add the symbol to the local dynamic symbol
1072 table since we might need to create a dynamic relocation
1075 || (h
&& h
->dynindx
== -1))
1078 owner
= (h
? h
->root
.u
.def
.section
->owner
: dyn_h
->owner
);
1080 if (! (_bfd_elf64_link_record_local_dynamic_symbol
1081 (x
->info
, owner
, dyn_h
->sym_indx
)))
1086 dyn_h
->dlt_offset
= x
->ofs
;
1087 x
->ofs
+= DLT_ENTRY_SIZE
;
1092 /* Allocate space for a DLT.PLT entry. */
1095 allocate_global_data_plt (dyn_h
, data
)
1096 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1099 struct elf64_hppa_allocate_data
*x
= (struct elf64_hppa_allocate_data
*)data
;
1102 && elf64_hppa_dynamic_symbol_p (dyn_h
->h
, x
->info
)
1103 && !((dyn_h
->h
->root
.type
== bfd_link_hash_defined
1104 || dyn_h
->h
->root
.type
== bfd_link_hash_defweak
)
1105 && dyn_h
->h
->root
.u
.def
.section
->output_section
!= NULL
))
1107 dyn_h
->plt_offset
= x
->ofs
;
1108 x
->ofs
+= PLT_ENTRY_SIZE
;
1109 if (dyn_h
->plt_offset
< 0x2000)
1110 elf64_hppa_hash_table (x
->info
)->gp_offset
= dyn_h
->plt_offset
;
1113 dyn_h
->want_plt
= 0;
1118 /* Allocate space for a STUB entry. */
1121 allocate_global_data_stub (dyn_h
, data
)
1122 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1125 struct elf64_hppa_allocate_data
*x
= (struct elf64_hppa_allocate_data
*)data
;
1127 if (dyn_h
->want_stub
1128 && elf64_hppa_dynamic_symbol_p (dyn_h
->h
, x
->info
)
1129 && !((dyn_h
->h
->root
.type
== bfd_link_hash_defined
1130 || dyn_h
->h
->root
.type
== bfd_link_hash_defweak
)
1131 && dyn_h
->h
->root
.u
.def
.section
->output_section
!= NULL
))
1133 dyn_h
->stub_offset
= x
->ofs
;
1134 x
->ofs
+= sizeof (plt_stub
);
1137 dyn_h
->want_stub
= 0;
1141 /* Allocate space for a FPTR entry. */
1144 allocate_global_data_opd (dyn_h
, data
)
1145 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1148 struct elf64_hppa_allocate_data
*x
= (struct elf64_hppa_allocate_data
*)data
;
1150 if (dyn_h
->want_opd
)
1152 struct elf_link_hash_entry
*h
= dyn_h
->h
;
1155 while (h
->root
.type
== bfd_link_hash_indirect
1156 || h
->root
.type
== bfd_link_hash_warning
)
1157 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1159 /* We never need an opd entry for a symbol which is not
1160 defined by this output file. */
1161 if (h
&& h
->root
.type
== bfd_link_hash_undefined
)
1162 dyn_h
->want_opd
= 0;
1164 /* If we are creating a shared library, took the address of a local
1165 function or might export this function from this object file, then
1166 we have to create an opd descriptor. */
1167 else if (x
->info
->shared
1170 || ((h
->root
.type
== bfd_link_hash_defined
1171 || h
->root
.type
== bfd_link_hash_defweak
)
1172 && h
->root
.u
.def
.section
->output_section
!= NULL
))
1174 /* If we are creating a shared library, then we will have to
1175 create a runtime relocation for the symbol to properly
1176 initialize the .opd entry. Make sure the symbol gets
1177 added to the dynamic symbol table. */
1179 && (h
== NULL
|| (h
->dynindx
== -1)))
1182 owner
= (h
? h
->root
.u
.def
.section
->owner
: dyn_h
->owner
);
1184 if (!_bfd_elf64_link_record_local_dynamic_symbol
1185 (x
->info
, owner
, dyn_h
->sym_indx
))
1189 /* This may not be necessary or desirable anymore now that
1190 we have some support for dealing with section symbols
1191 in dynamic relocs. But name munging does make the result
1192 much easier to debug. ie, the EPLT reloc will reference
1193 a symbol like .foobar, instead of .text + offset. */
1194 if (x
->info
->shared
&& h
)
1197 struct elf_link_hash_entry
*nh
;
1199 new_name
= alloca (strlen (h
->root
.root
.string
) + 2);
1201 strcpy (new_name
+ 1, h
->root
.root
.string
);
1203 nh
= elf_link_hash_lookup (elf_hash_table (x
->info
),
1204 new_name
, true, true, true);
1206 nh
->root
.type
= h
->root
.type
;
1207 nh
->root
.u
.def
.value
= h
->root
.u
.def
.value
;
1208 nh
->root
.u
.def
.section
= h
->root
.u
.def
.section
;
1210 if (! bfd_elf64_link_record_dynamic_symbol (x
->info
, nh
))
1214 dyn_h
->opd_offset
= x
->ofs
;
1215 x
->ofs
+= OPD_ENTRY_SIZE
;
1218 /* Otherwise we do not need an opd entry. */
1220 dyn_h
->want_opd
= 0;
1225 /* HP requires the EI_OSABI field to be filled in. The assignment to
1226 EI_ABIVERSION may not be strictly necessary. */
1229 elf64_hppa_post_process_headers (abfd
, link_info
)
1231 struct bfd_link_info
* link_info ATTRIBUTE_UNUSED
;
1233 Elf_Internal_Ehdr
* i_ehdrp
;
1235 i_ehdrp
= elf_elfheader (abfd
);
1237 if (strcmp (bfd_get_target (abfd
), "elf64-hppa-linux") == 0)
1239 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_LINUX
;
1243 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_HPUX
;
1244 i_ehdrp
->e_ident
[EI_ABIVERSION
] = 1;
1248 /* Create function descriptor section (.opd). This section is called .opd
1249 because it contains "official prodecure descriptors". The "official"
1250 refers to the fact that these descriptors are used when taking the address
1251 of a procedure, thus ensuring a unique address for each procedure. */
1254 get_opd (abfd
, info
, hppa_info
)
1256 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1257 struct elf64_hppa_link_hash_table
*hppa_info
;
1262 opd
= hppa_info
->opd_sec
;
1265 dynobj
= hppa_info
->root
.dynobj
;
1267 hppa_info
->root
.dynobj
= dynobj
= abfd
;
1269 opd
= bfd_make_section (dynobj
, ".opd");
1271 || !bfd_set_section_flags (dynobj
, opd
,
1276 | SEC_LINKER_CREATED
))
1277 || !bfd_set_section_alignment (abfd
, opd
, 3))
1283 hppa_info
->opd_sec
= opd
;
1289 /* Create the PLT section. */
1292 get_plt (abfd
, info
, hppa_info
)
1294 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1295 struct elf64_hppa_link_hash_table
*hppa_info
;
1300 plt
= hppa_info
->plt_sec
;
1303 dynobj
= hppa_info
->root
.dynobj
;
1305 hppa_info
->root
.dynobj
= dynobj
= abfd
;
1307 plt
= bfd_make_section (dynobj
, ".plt");
1309 || !bfd_set_section_flags (dynobj
, plt
,
1314 | SEC_LINKER_CREATED
))
1315 || !bfd_set_section_alignment (abfd
, plt
, 3))
1321 hppa_info
->plt_sec
= plt
;
1327 /* Create the DLT section. */
1330 get_dlt (abfd
, info
, hppa_info
)
1332 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1333 struct elf64_hppa_link_hash_table
*hppa_info
;
1338 dlt
= hppa_info
->dlt_sec
;
1341 dynobj
= hppa_info
->root
.dynobj
;
1343 hppa_info
->root
.dynobj
= dynobj
= abfd
;
1345 dlt
= bfd_make_section (dynobj
, ".dlt");
1347 || !bfd_set_section_flags (dynobj
, dlt
,
1352 | SEC_LINKER_CREATED
))
1353 || !bfd_set_section_alignment (abfd
, dlt
, 3))
1359 hppa_info
->dlt_sec
= dlt
;
1365 /* Create the stubs section. */
1368 get_stub (abfd
, info
, hppa_info
)
1370 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1371 struct elf64_hppa_link_hash_table
*hppa_info
;
1376 stub
= hppa_info
->stub_sec
;
1379 dynobj
= hppa_info
->root
.dynobj
;
1381 hppa_info
->root
.dynobj
= dynobj
= abfd
;
1383 stub
= bfd_make_section (dynobj
, ".stub");
1385 || !bfd_set_section_flags (dynobj
, stub
,
1391 | SEC_LINKER_CREATED
))
1392 || !bfd_set_section_alignment (abfd
, stub
, 3))
1398 hppa_info
->stub_sec
= stub
;
1404 /* Create sections necessary for dynamic linking. This is only a rough
1405 cut and will likely change as we learn more about the somewhat
1406 unusual dynamic linking scheme HP uses.
1409 Contains code to implement cross-space calls. The first time one
1410 of the stubs is used it will call into the dynamic linker, later
1411 calls will go straight to the target.
1413 The only stub we support right now looks like
1417 ldd OFFSET+8(%dp),%dp
1419 Other stubs may be needed in the future. We may want the remove
1420 the break/nop instruction. It is only used right now to keep the
1421 offset of a .plt entry and a .stub entry in sync.
1424 This is what most people call the .got. HP used a different name.
1428 Relocations for the DLT.
1431 Function pointers as address,gp pairs.
1434 Should contain dynamic IPLT (and EPLT?) relocations.
1440 EPLT relocations for symbols exported from shared libraries. */
1443 elf64_hppa_create_dynamic_sections (abfd
, info
)
1445 struct bfd_link_info
*info
;
1449 if (! get_stub (abfd
, info
, elf64_hppa_hash_table (info
)))
1452 if (! get_dlt (abfd
, info
, elf64_hppa_hash_table (info
)))
1455 if (! get_plt (abfd
, info
, elf64_hppa_hash_table (info
)))
1458 if (! get_opd (abfd
, info
, elf64_hppa_hash_table (info
)))
1461 s
= bfd_make_section(abfd
, ".rela.dlt");
1463 || !bfd_set_section_flags (abfd
, s
, (SEC_ALLOC
| SEC_LOAD
1467 | SEC_LINKER_CREATED
))
1468 || !bfd_set_section_alignment (abfd
, s
, 3))
1470 elf64_hppa_hash_table (info
)->dlt_rel_sec
= s
;
1472 s
= bfd_make_section(abfd
, ".rela.plt");
1474 || !bfd_set_section_flags (abfd
, s
, (SEC_ALLOC
| SEC_LOAD
1478 | SEC_LINKER_CREATED
))
1479 || !bfd_set_section_alignment (abfd
, s
, 3))
1481 elf64_hppa_hash_table (info
)->plt_rel_sec
= s
;
1483 s
= bfd_make_section(abfd
, ".rela.data");
1485 || !bfd_set_section_flags (abfd
, s
, (SEC_ALLOC
| SEC_LOAD
1489 | SEC_LINKER_CREATED
))
1490 || !bfd_set_section_alignment (abfd
, s
, 3))
1492 elf64_hppa_hash_table (info
)->other_rel_sec
= s
;
1494 s
= bfd_make_section(abfd
, ".rela.opd");
1496 || !bfd_set_section_flags (abfd
, s
, (SEC_ALLOC
| SEC_LOAD
1500 | SEC_LINKER_CREATED
))
1501 || !bfd_set_section_alignment (abfd
, s
, 3))
1503 elf64_hppa_hash_table (info
)->opd_rel_sec
= s
;
1508 /* Allocate dynamic relocations for those symbols that turned out
1512 allocate_dynrel_entries (dyn_h
, data
)
1513 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1516 struct elf64_hppa_allocate_data
*x
= (struct elf64_hppa_allocate_data
*)data
;
1517 struct elf64_hppa_link_hash_table
*hppa_info
;
1518 struct elf64_hppa_dyn_reloc_entry
*rent
;
1519 boolean dynamic_symbol
, shared
;
1521 hppa_info
= elf64_hppa_hash_table (x
->info
);
1522 dynamic_symbol
= elf64_hppa_dynamic_symbol_p (dyn_h
->h
, x
->info
);
1523 shared
= x
->info
->shared
;
1525 /* We may need to allocate relocations for a non-dynamic symbol
1526 when creating a shared library. */
1527 if (!dynamic_symbol
&& !shared
)
1530 /* Take care of the normal data relocations. */
1532 for (rent
= dyn_h
->reloc_entries
; rent
; rent
= rent
->next
)
1536 case R_PARISC_FPTR64
:
1537 /* Allocate one iff we are not building a shared library and
1538 !want_opd, which by this point will be true only if we're
1539 actually allocating one statically in the main executable. */
1540 if (!x
->info
->shared
&& dyn_h
->want_opd
)
1544 hppa_info
->other_rel_sec
->_raw_size
+= sizeof (Elf64_External_Rela
);
1546 /* Make sure this symbol gets into the dynamic symbol table if it is
1547 not already recorded. ?!? This should not be in the loop since
1548 the symbol need only be added once. */
1549 if (dyn_h
->h
== 0 || dyn_h
->h
->dynindx
== -1)
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 /* Set the final sizes of the dynamic sections and allocate memory for
1618 the contents of our special sections. */
1621 elf64_hppa_size_dynamic_sections (output_bfd
, info
)
1623 struct bfd_link_info
*info
;
1630 struct elf64_hppa_allocate_data data
;
1631 struct elf64_hppa_link_hash_table
*hppa_info
;
1633 hppa_info
= elf64_hppa_hash_table (info
);
1635 dynobj
= elf_hash_table (info
)->dynobj
;
1636 BFD_ASSERT (dynobj
!= NULL
);
1638 if (elf_hash_table (info
)->dynamic_sections_created
)
1640 /* Set the contents of the .interp section to the interpreter. */
1643 s
= bfd_get_section_by_name (dynobj
, ".interp");
1644 BFD_ASSERT (s
!= NULL
);
1645 s
->_raw_size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1646 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1651 /* We may have created entries in the .rela.got section.
1652 However, if we are not creating the dynamic sections, we will
1653 not actually use these entries. Reset the size of .rela.dlt,
1654 which will cause it to get stripped from the output file
1656 s
= bfd_get_section_by_name (dynobj
, ".rela.dlt");
1661 /* Allocate the GOT entries. */
1664 if (elf64_hppa_hash_table (info
)->dlt_sec
)
1667 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
1668 allocate_global_data_dlt
, &data
);
1669 hppa_info
->dlt_sec
->_raw_size
= data
.ofs
;
1672 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
1673 allocate_global_data_plt
, &data
);
1674 hppa_info
->plt_sec
->_raw_size
= data
.ofs
;
1677 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
1678 allocate_global_data_stub
, &data
);
1679 hppa_info
->stub_sec
->_raw_size
= data
.ofs
;
1682 /* Mark each function this program exports so that we will allocate
1683 space in the .opd section for each function's FPTR.
1685 We have to traverse the main linker hash table since we have to
1686 find functions which may not have been mentioned in any relocs. */
1687 elf_link_hash_traverse (elf_hash_table (info
),
1688 elf64_hppa_mark_exported_functions
,
1691 /* Allocate space for entries in the .opd section. */
1692 if (elf64_hppa_hash_table (info
)->opd_sec
)
1695 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
1696 allocate_global_data_opd
, &data
);
1697 hppa_info
->opd_sec
->_raw_size
= data
.ofs
;
1700 /* Now allocate space for dynamic relocations, if necessary. */
1701 if (hppa_info
->root
.dynamic_sections_created
)
1702 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
1703 allocate_dynrel_entries
, &data
);
1705 /* The sizes of all the sections are set. Allocate memory for them. */
1709 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1714 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1717 /* It's OK to base decisions on the section name, because none
1718 of the dynobj section names depend upon the input files. */
1719 name
= bfd_get_section_name (dynobj
, s
);
1723 if (strcmp (name
, ".plt") == 0)
1725 if (s
->_raw_size
== 0)
1727 /* Strip this section if we don't need it; see the
1733 /* Remember whether there is a PLT. */
1737 else if (strcmp (name
, ".dlt") == 0)
1739 if (s
->_raw_size
== 0)
1741 /* Strip this section if we don't need it; see the
1746 else if (strcmp (name
, ".opd") == 0)
1748 if (s
->_raw_size
== 0)
1750 /* Strip this section if we don't need it; see the
1755 else if (strncmp (name
, ".rela", 4) == 0)
1757 if (s
->_raw_size
== 0)
1759 /* If we don't need this section, strip it from the
1760 output file. This is mostly to handle .rela.bss and
1761 .rela.plt. We must create both sections in
1762 create_dynamic_sections, because they must be created
1763 before the linker maps input sections to output
1764 sections. The linker does that before
1765 adjust_dynamic_symbol is called, and it is that
1766 function which decides whether anything needs to go
1767 into these sections. */
1774 /* Remember whether there are any reloc sections other
1776 if (strcmp (name
, ".rela.plt") != 0)
1778 const char *outname
;
1782 /* If this relocation section applies to a read only
1783 section, then we probably need a DT_TEXTREL
1784 entry. The entries in the .rela.plt section
1785 really apply to the .got section, which we
1786 created ourselves and so know is not readonly. */
1787 outname
= bfd_get_section_name (output_bfd
,
1789 target
= bfd_get_section_by_name (output_bfd
, outname
+ 4);
1791 && (target
->flags
& SEC_READONLY
) != 0
1792 && (target
->flags
& SEC_ALLOC
) != 0)
1796 /* We use the reloc_count field as a counter if we need
1797 to copy relocs into the output file. */
1801 else if (strncmp (name
, ".dlt", 4) != 0
1802 && strcmp (name
, ".stub") != 0
1803 && strcmp (name
, ".got") != 0)
1805 /* It's not one of our sections, so don't allocate space. */
1811 _bfd_strip_section_from_output (info
, s
);
1815 /* Allocate memory for the section contents if it has not
1816 been allocated already. We use bfd_zalloc here in case
1817 unused entries are not reclaimed before the section's
1818 contents are written out. This should not happen, but this
1819 way if it does, we get a R_PARISC_NONE reloc instead of
1821 if (s
->contents
== NULL
)
1823 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->_raw_size
);
1824 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
1829 if (elf_hash_table (info
)->dynamic_sections_created
)
1831 /* Always create a DT_PLTGOT. It actually has nothing to do with
1832 the PLT, it is how we communicate the __gp value of a load
1833 module to the dynamic linker. */
1834 #define add_dynamic_entry(TAG, VAL) \
1835 bfd_elf64_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
1837 if (!add_dynamic_entry (DT_HP_DLD_FLAGS
, 0)
1838 || !add_dynamic_entry (DT_PLTGOT
, 0))
1841 /* Add some entries to the .dynamic section. We fill in the
1842 values later, in elf64_hppa_finish_dynamic_sections, but we
1843 must add the entries now so that we get the correct size for
1844 the .dynamic section. The DT_DEBUG entry is filled in by the
1845 dynamic linker and used by the debugger. */
1848 if (!add_dynamic_entry (DT_DEBUG
, 0)
1849 || !add_dynamic_entry (DT_HP_DLD_HOOK
, 0)
1850 || !add_dynamic_entry (DT_HP_LOAD_MAP
, 0))
1856 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
1857 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
1858 || !add_dynamic_entry (DT_JMPREL
, 0))
1864 if (!add_dynamic_entry (DT_RELA
, 0)
1865 || !add_dynamic_entry (DT_RELASZ
, 0)
1866 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
1872 if (!add_dynamic_entry (DT_TEXTREL
, 0))
1874 info
->flags
|= DF_TEXTREL
;
1877 #undef add_dynamic_entry
1882 /* Called after we have output the symbol into the dynamic symbol
1883 table, but before we output the symbol into the normal symbol
1886 For some symbols we had to change their address when outputting
1887 the dynamic symbol table. We undo that change here so that
1888 the symbols have their expected value in the normal symbol
1892 elf64_hppa_link_output_symbol_hook (abfd
, info
, name
, sym
, input_sec
)
1893 bfd
*abfd ATTRIBUTE_UNUSED
;
1894 struct bfd_link_info
*info
;
1896 Elf_Internal_Sym
*sym
;
1897 asection
*input_sec ATTRIBUTE_UNUSED
;
1899 struct elf64_hppa_link_hash_table
*hppa_info
;
1900 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1902 /* We may be called with the file symbol or section symbols.
1903 They never need munging, so it is safe to ignore them. */
1907 /* Get the PA dyn_symbol (if any) associated with NAME. */
1908 hppa_info
= elf64_hppa_hash_table (info
);
1909 dyn_h
= elf64_hppa_dyn_hash_lookup (&hppa_info
->dyn_hash_table
,
1910 name
, false, false);
1912 /* Function symbols for which we created .opd entries *may* have been
1913 munged by finish_dynamic_symbol and have to be un-munged here.
1915 Note that finish_dynamic_symbol sometimes turns dynamic symbols
1916 into non-dynamic ones, so we initialize st_shndx to -1 in
1917 mark_exported_functions and check to see if it was overwritten
1918 here instead of just checking dyn_h->h->dynindx. */
1919 if (dyn_h
&& dyn_h
->want_opd
&& dyn_h
->st_shndx
!= -1)
1921 /* Restore the saved value and section index. */
1922 sym
->st_value
= dyn_h
->st_value
;
1923 sym
->st_shndx
= dyn_h
->st_shndx
;
1929 /* Finish up dynamic symbol handling. We set the contents of various
1930 dynamic sections here. */
1933 elf64_hppa_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
1935 struct bfd_link_info
*info
;
1936 struct elf_link_hash_entry
*h
;
1937 Elf_Internal_Sym
*sym
;
1939 asection
*stub
, *splt
, *sdlt
, *sopd
, *spltrel
, *sdltrel
;
1940 struct elf64_hppa_link_hash_table
*hppa_info
;
1941 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
1943 hppa_info
= elf64_hppa_hash_table (info
);
1944 dyn_h
= elf64_hppa_dyn_hash_lookup (&hppa_info
->dyn_hash_table
,
1945 h
->root
.root
.string
, false, false);
1947 stub
= hppa_info
->stub_sec
;
1948 splt
= hppa_info
->plt_sec
;
1949 sdlt
= hppa_info
->dlt_sec
;
1950 sopd
= hppa_info
->opd_sec
;
1951 spltrel
= hppa_info
->plt_rel_sec
;
1952 sdltrel
= hppa_info
->dlt_rel_sec
;
1954 BFD_ASSERT (stub
!= NULL
&& splt
!= NULL
1955 && sopd
!= NULL
&& sdlt
!= NULL
)
1957 /* Incredible. It is actually necessary to NOT use the symbol's real
1958 value when building the dynamic symbol table for a shared library.
1959 At least for symbols that refer to functions.
1961 We will store a new value and section index into the symbol long
1962 enough to output it into the dynamic symbol table, then we restore
1963 the original values (in elf64_hppa_link_output_symbol_hook). */
1964 if (dyn_h
&& dyn_h
->want_opd
)
1966 /* Save away the original value and section index so that we
1967 can restore them later. */
1968 dyn_h
->st_value
= sym
->st_value
;
1969 dyn_h
->st_shndx
= sym
->st_shndx
;
1971 /* For the dynamic symbol table entry, we want the value to be
1972 address of this symbol's entry within the .opd section. */
1973 sym
->st_value
= (dyn_h
->opd_offset
1974 + sopd
->output_offset
1975 + sopd
->output_section
->vma
);
1976 sym
->st_shndx
= _bfd_elf_section_from_bfd_section (output_bfd
,
1977 sopd
->output_section
);
1980 /* Initialize a .plt entry if requested. */
1981 if (dyn_h
&& dyn_h
->want_plt
1982 && elf64_hppa_dynamic_symbol_p (dyn_h
->h
, info
))
1985 Elf_Internal_Rela rel
;
1987 /* We do not actually care about the value in the PLT entry
1988 if we are creating a shared library and the symbol is
1989 still undefined, we create a dynamic relocation to fill
1990 in the correct value. */
1991 if (info
->shared
&& h
->root
.type
== bfd_link_hash_undefined
)
1994 value
= (h
->root
.u
.def
.value
+ h
->root
.u
.def
.section
->vma
);
1996 /* Fill in the entry in the procedure linkage table.
1998 The format of a plt entry is
2001 plt_offset is the offset within the PLT section at which to
2002 install the PLT entry.
2004 We are modifying the in-memory PLT contents here, so we do not add
2005 in the output_offset of the PLT section. */
2007 bfd_put_64 (splt
->owner
, value
, splt
->contents
+ dyn_h
->plt_offset
);
2008 value
= _bfd_get_gp_value (splt
->output_section
->owner
);
2009 bfd_put_64 (splt
->owner
, value
, splt
->contents
+ dyn_h
->plt_offset
+ 0x8);
2011 /* Create a dynamic IPLT relocation for this entry.
2013 We are creating a relocation in the output file's PLT section,
2014 which is included within the DLT secton. So we do need to include
2015 the PLT's output_offset in the computation of the relocation's
2017 rel
.r_offset
= (dyn_h
->plt_offset
+ splt
->output_offset
2018 + splt
->output_section
->vma
);
2019 rel
.r_info
= ELF64_R_INFO (h
->dynindx
, R_PARISC_IPLT
);
2022 bfd_elf64_swap_reloca_out (splt
->output_section
->owner
, &rel
,
2023 (((Elf64_External_Rela
*)
2025 + spltrel
->reloc_count
));
2026 spltrel
->reloc_count
++;
2029 /* Initialize an external call stub entry if requested. */
2030 if (dyn_h
&& dyn_h
->want_stub
2031 && elf64_hppa_dynamic_symbol_p (dyn_h
->h
, info
))
2035 unsigned int max_offset
;
2037 /* Install the generic stub template.
2039 We are modifying the contents of the stub section, so we do not
2040 need to include the stub section's output_offset here. */
2041 memcpy (stub
->contents
+ dyn_h
->stub_offset
, plt_stub
, sizeof (plt_stub
));
2043 /* Fix up the first ldd instruction.
2045 We are modifying the contents of the STUB section in memory,
2046 so we do not need to include its output offset in this computation.
2048 Note the plt_offset value is the value of the PLT entry relative to
2049 the start of the PLT section. These instructions will reference
2050 data relative to the value of __gp, which may not necessarily have
2051 the same address as the start of the PLT section.
2053 gp_offset contains the offset of __gp within the PLT section. */
2054 value
= dyn_h
->plt_offset
- hppa_info
->gp_offset
;
2056 insn
= bfd_get_32 (stub
->owner
, stub
->contents
+ dyn_h
->stub_offset
);
2057 if (output_bfd
->arch_info
->mach
>= 25)
2059 /* Wide mode allows 16 bit offsets. */
2062 insn
|= re_assemble_16 ((int) value
);
2068 insn
|= re_assemble_14 ((int) value
);
2071 if ((value
& 7) || value
+ max_offset
>= 2*max_offset
- 8)
2073 (*_bfd_error_handler
) (_("stub entry for %s cannot load .plt, dp offset = %ld"),
2079 bfd_put_32 (stub
->owner
, (bfd_vma
) insn
,
2080 stub
->contents
+ dyn_h
->stub_offset
);
2082 /* Fix up the second ldd instruction. */
2084 insn
= bfd_get_32 (stub
->owner
, stub
->contents
+ dyn_h
->stub_offset
+ 8);
2085 if (output_bfd
->arch_info
->mach
>= 25)
2088 insn
|= re_assemble_16 ((int) value
);
2093 insn
|= re_assemble_14 ((int) value
);
2095 bfd_put_32 (stub
->owner
, (bfd_vma
) insn
,
2096 stub
->contents
+ dyn_h
->stub_offset
+ 8);
2099 /* Millicode symbols should not be put in the dynamic
2100 symbol table under any circumstances. */
2101 if (ELF_ST_TYPE (sym
->st_info
) == STT_PARISC_MILLI
)
2107 /* The .opd section contains FPTRs for each function this file
2108 exports. Initialize the FPTR entries. */
2111 elf64_hppa_finalize_opd (dyn_h
, data
)
2112 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
2115 struct bfd_link_info
*info
= (struct bfd_link_info
*)data
;
2116 struct elf64_hppa_link_hash_table
*hppa_info
;
2117 struct elf_link_hash_entry
*h
= dyn_h
->h
;
2121 hppa_info
= elf64_hppa_hash_table (info
);
2122 sopd
= hppa_info
->opd_sec
;
2123 sopdrel
= hppa_info
->opd_rel_sec
;
2125 if (h
&& dyn_h
&& dyn_h
->want_opd
)
2129 /* The first two words of an .opd entry are zero.
2131 We are modifying the contents of the OPD section in memory, so we
2132 do not need to include its output offset in this computation. */
2133 memset (sopd
->contents
+ dyn_h
->opd_offset
, 0, 16);
2135 value
= (h
->root
.u
.def
.value
2136 + h
->root
.u
.def
.section
->output_section
->vma
2137 + h
->root
.u
.def
.section
->output_offset
);
2139 /* The next word is the address of the function. */
2140 bfd_put_64 (sopd
->owner
, value
, sopd
->contents
+ dyn_h
->opd_offset
+ 16);
2142 /* The last word is our local __gp value. */
2143 value
= _bfd_get_gp_value (sopd
->output_section
->owner
);
2144 bfd_put_64 (sopd
->owner
, value
, sopd
->contents
+ dyn_h
->opd_offset
+ 24);
2147 /* If we are generating a shared library, we must generate EPLT relocations
2148 for each entry in the .opd, even for static functions (they may have
2149 had their address taken). */
2150 if (info
->shared
&& dyn_h
&& dyn_h
->want_opd
)
2152 Elf64_Internal_Rela rel
;
2155 /* We may need to do a relocation against a local symbol, in
2156 which case we have to look up it's dynamic symbol index off
2157 the local symbol hash table. */
2158 if (h
&& h
->dynindx
!= -1)
2159 dynindx
= h
->dynindx
;
2162 = _bfd_elf_link_lookup_local_dynindx (info
, dyn_h
->owner
,
2165 /* The offset of this relocation is the absolute address of the
2166 .opd entry for this symbol. */
2167 rel
.r_offset
= (dyn_h
->opd_offset
+ sopd
->output_offset
2168 + sopd
->output_section
->vma
);
2170 /* If H is non-null, then we have an external symbol.
2172 It is imperative that we use a different dynamic symbol for the
2173 EPLT relocation if the symbol has global scope.
2175 In the dynamic symbol table, the function symbol will have a value
2176 which is address of the function's .opd entry.
2178 Thus, we can not use that dynamic symbol for the EPLT relocation
2179 (if we did, the data in the .opd would reference itself rather
2180 than the actual address of the function). Instead we have to use
2181 a new dynamic symbol which has the same value as the original global
2184 We prefix the original symbol with a "." and use the new symbol in
2185 the EPLT relocation. This new symbol has already been recorded in
2186 the symbol table, we just have to look it up and use it.
2188 We do not have such problems with static functions because we do
2189 not make their addresses in the dynamic symbol table point to
2190 the .opd entry. Ultimately this should be safe since a static
2191 function can not be directly referenced outside of its shared
2194 We do have to play similar games for FPTR relocations in shared
2195 libraries, including those for static symbols. See the FPTR
2196 handling in elf64_hppa_finalize_dynreloc. */
2200 struct elf_link_hash_entry
*nh
;
2202 new_name
= alloca (strlen (h
->root
.root
.string
) + 2);
2204 strcpy (new_name
+ 1, h
->root
.root
.string
);
2206 nh
= elf_link_hash_lookup (elf_hash_table (info
),
2207 new_name
, false, false, false);
2209 /* All we really want from the new symbol is its dynamic
2211 dynindx
= nh
->dynindx
;
2215 rel
.r_info
= ELF64_R_INFO (dynindx
, R_PARISC_EPLT
);
2217 bfd_elf64_swap_reloca_out (sopd
->output_section
->owner
, &rel
,
2218 (((Elf64_External_Rela
*)
2220 + sopdrel
->reloc_count
));
2221 sopdrel
->reloc_count
++;
2226 /* The .dlt section contains addresses for items referenced through the
2227 dlt. Note that we can have a DLTIND relocation for a local symbol, thus
2228 we can not depend on finish_dynamic_symbol to initialize the .dlt. */
2231 elf64_hppa_finalize_dlt (dyn_h
, data
)
2232 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
2235 struct bfd_link_info
*info
= (struct bfd_link_info
*)data
;
2236 struct elf64_hppa_link_hash_table
*hppa_info
;
2237 asection
*sdlt
, *sdltrel
;
2238 struct elf_link_hash_entry
*h
= dyn_h
->h
;
2240 hppa_info
= elf64_hppa_hash_table (info
);
2242 sdlt
= hppa_info
->dlt_sec
;
2243 sdltrel
= hppa_info
->dlt_rel_sec
;
2245 /* H/DYN_H may refer to a local variable and we know it's
2246 address, so there is no need to create a relocation. Just install
2247 the proper value into the DLT, note this shortcut can not be
2248 skipped when building a shared library. */
2249 if (! info
->shared
&& h
&& dyn_h
&& dyn_h
->want_dlt
)
2253 /* If we had an LTOFF_FPTR style relocation we want the DLT entry
2254 to point to the FPTR entry in the .opd section.
2256 We include the OPD's output offset in this computation as
2257 we are referring to an absolute address in the resulting
2259 if (dyn_h
->want_opd
)
2261 value
= (dyn_h
->opd_offset
2262 + hppa_info
->opd_sec
->output_offset
2263 + hppa_info
->opd_sec
->output_section
->vma
);
2267 value
= (h
->root
.u
.def
.value
2268 + h
->root
.u
.def
.section
->output_offset
);
2270 if (h
->root
.u
.def
.section
->output_section
)
2271 value
+= h
->root
.u
.def
.section
->output_section
->vma
;
2273 value
+= h
->root
.u
.def
.section
->vma
;
2276 /* We do not need to include the output offset of the DLT section
2277 here because we are modifying the in-memory contents. */
2278 bfd_put_64 (sdlt
->owner
, value
, sdlt
->contents
+ dyn_h
->dlt_offset
);
2281 /* Create a relocation for the DLT entry assocated with this symbol.
2282 When building a shared library the symbol does not have to be dynamic. */
2284 && (elf64_hppa_dynamic_symbol_p (dyn_h
->h
, info
) || info
->shared
))
2286 Elf64_Internal_Rela rel
;
2289 /* We may need to do a relocation against a local symbol, in
2290 which case we have to look up it's dynamic symbol index off
2291 the local symbol hash table. */
2292 if (h
&& h
->dynindx
!= -1)
2293 dynindx
= h
->dynindx
;
2296 = _bfd_elf_link_lookup_local_dynindx (info
, dyn_h
->owner
,
2299 /* Create a dynamic relocation for this entry. Do include the output
2300 offset of the DLT entry since we need an absolute address in the
2301 resulting object file. */
2302 rel
.r_offset
= (dyn_h
->dlt_offset
+ sdlt
->output_offset
2303 + sdlt
->output_section
->vma
);
2304 if (h
&& h
->type
== STT_FUNC
)
2305 rel
.r_info
= ELF64_R_INFO (dynindx
, R_PARISC_FPTR64
);
2307 rel
.r_info
= ELF64_R_INFO (dynindx
, R_PARISC_DIR64
);
2310 bfd_elf64_swap_reloca_out (sdlt
->output_section
->owner
, &rel
,
2311 (((Elf64_External_Rela
*)
2313 + sdltrel
->reloc_count
));
2314 sdltrel
->reloc_count
++;
2319 /* Finalize the dynamic relocations. Specifically the FPTR relocations
2320 for dynamic functions used to initialize static data. */
2323 elf64_hppa_finalize_dynreloc (dyn_h
, data
)
2324 struct elf64_hppa_dyn_hash_entry
*dyn_h
;
2327 struct bfd_link_info
*info
= (struct bfd_link_info
*)data
;
2328 struct elf64_hppa_link_hash_table
*hppa_info
;
2329 struct elf_link_hash_entry
*h
;
2332 dynamic_symbol
= elf64_hppa_dynamic_symbol_p (dyn_h
->h
, info
);
2334 if (!dynamic_symbol
&& !info
->shared
)
2337 if (dyn_h
->reloc_entries
)
2339 struct elf64_hppa_dyn_reloc_entry
*rent
;
2342 hppa_info
= elf64_hppa_hash_table (info
);
2345 /* We may need to do a relocation against a local symbol, in
2346 which case we have to look up it's dynamic symbol index off
2347 the local symbol hash table. */
2348 if (h
&& h
->dynindx
!= -1)
2349 dynindx
= h
->dynindx
;
2352 = _bfd_elf_link_lookup_local_dynindx (info
, dyn_h
->owner
,
2355 for (rent
= dyn_h
->reloc_entries
; rent
; rent
= rent
->next
)
2357 Elf64_Internal_Rela rel
;
2361 case R_PARISC_FPTR64
:
2362 /* Allocate one iff we are not building a shared library and
2363 !want_opd, which by this point will be true only if we're
2364 actually allocating one statically in the main executable. */
2365 if (!info
->shared
&& dyn_h
->want_opd
)
2370 /* Create a dynamic relocation for this entry.
2372 We need the output offset for the reloc's section because
2373 we are creating an absolute address in the resulting object
2375 rel
.r_offset
= (rent
->offset
+ rent
->sec
->output_offset
2376 + rent
->sec
->output_section
->vma
);
2378 /* An FPTR64 relocation implies that we took the address of
2379 a function and that the function has an entry in the .opd
2380 section. We want the FPTR64 relocation to reference the
2383 We could munge the symbol value in the dynamic symbol table
2384 (in fact we already do for functions with global scope) to point
2385 to the .opd entry. Then we could use that dynamic symbol in
2388 Or we could do something sensible, not munge the symbol's
2389 address and instead just use a different symbol to reference
2390 the .opd entry. At least that seems sensible until you
2391 realize there's no local dynamic symbols we can use for that
2392 purpose. Thus the hair in the check_relocs routine.
2394 We use a section symbol recorded by check_relocs as the
2395 base symbol for the relocation. The addend is the difference
2396 between the section symbol and the address of the .opd entry. */
2397 if (info
->shared
&& rent
->type
== R_PARISC_FPTR64
)
2399 bfd_vma value
, value2
;
2401 /* First compute the address of the opd entry for this symbol. */
2402 value
= (dyn_h
->opd_offset
2403 + hppa_info
->opd_sec
->output_section
->vma
2404 + hppa_info
->opd_sec
->output_offset
);
2406 /* Compute the value of the start of the section with
2408 value2
= (rent
->sec
->output_section
->vma
2409 + rent
->sec
->output_offset
);
2411 /* Compute the difference between the start of the section
2412 with the relocation and the opd entry. */
2415 /* The result becomes the addend of the relocation. */
2416 rel
.r_addend
= value
;
2418 /* The section symbol becomes the symbol for the dynamic
2421 = _bfd_elf_link_lookup_local_dynindx (info
,
2426 rel
.r_addend
= rent
->addend
;
2428 rel
.r_info
= ELF64_R_INFO (dynindx
, rent
->type
);
2430 bfd_elf64_swap_reloca_out (hppa_info
->other_rel_sec
->output_section
->owner
,
2432 (((Elf64_External_Rela
*)
2433 hppa_info
->other_rel_sec
->contents
)
2434 + hppa_info
->other_rel_sec
->reloc_count
));
2435 hppa_info
->other_rel_sec
->reloc_count
++;
2442 /* Finish up the dynamic sections. */
2445 elf64_hppa_finish_dynamic_sections (output_bfd
, info
)
2447 struct bfd_link_info
*info
;
2451 struct elf64_hppa_link_hash_table
*hppa_info
;
2453 hppa_info
= elf64_hppa_hash_table (info
);
2455 /* Finalize the contents of the .opd section. */
2456 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
2457 elf64_hppa_finalize_opd
,
2460 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
2461 elf64_hppa_finalize_dynreloc
,
2464 /* Finalize the contents of the .dlt section. */
2465 dynobj
= elf_hash_table (info
)->dynobj
;
2466 /* Finalize the contents of the .dlt section. */
2467 elf64_hppa_dyn_hash_traverse (&hppa_info
->dyn_hash_table
,
2468 elf64_hppa_finalize_dlt
,
2471 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
2473 if (elf_hash_table (info
)->dynamic_sections_created
)
2475 Elf64_External_Dyn
*dyncon
, *dynconend
;
2477 BFD_ASSERT (sdyn
!= NULL
);
2479 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
2480 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->_raw_size
);
2481 for (; dyncon
< dynconend
; dyncon
++)
2483 Elf_Internal_Dyn dyn
;
2486 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
2493 case DT_HP_LOAD_MAP
:
2494 /* Compute the absolute address of 16byte scratchpad area
2495 for the dynamic linker.
2497 By convention the linker script will allocate the scratchpad
2498 area at the start of the .data section. So all we have to
2499 to is find the start of the .data section. */
2500 s
= bfd_get_section_by_name (output_bfd
, ".data");
2501 dyn
.d_un
.d_ptr
= s
->vma
;
2502 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2506 /* HP's use PLTGOT to set the GOT register. */
2507 dyn
.d_un
.d_ptr
= _bfd_get_gp_value (output_bfd
);
2508 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2512 s
= hppa_info
->plt_rel_sec
;
2513 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
2514 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2518 s
= hppa_info
->plt_rel_sec
;
2519 dyn
.d_un
.d_val
= s
->_raw_size
;
2520 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2524 s
= hppa_info
->other_rel_sec
;
2526 s
= hppa_info
->dlt_rel_sec
;
2527 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
2528 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2532 s
= hppa_info
->other_rel_sec
;
2533 dyn
.d_un
.d_val
= s
->_raw_size
;
2534 s
= hppa_info
->dlt_rel_sec
;
2535 dyn
.d_un
.d_val
+= s
->_raw_size
;
2536 s
= hppa_info
->opd_rel_sec
;
2537 dyn
.d_un
.d_val
+= s
->_raw_size
;
2538 /* There is some question about whether or not the size of
2539 the PLT relocs should be included here. HP's tools do
2540 it, so we'll emulate them. */
2541 s
= hppa_info
->plt_rel_sec
;
2542 dyn
.d_un
.d_val
+= s
->_raw_size
;
2543 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
2553 /* Return the number of additional phdrs we will need.
2555 The generic ELF code only creates PT_PHDRs for executables. The HP
2556 dynamic linker requires PT_PHDRs for dynamic libraries too.
2558 This routine indicates that the backend needs one additional program
2559 header for that case.
2561 Note we do not have access to the link info structure here, so we have
2562 to guess whether or not we are building a shared library based on the
2563 existence of a .interp section. */
2566 elf64_hppa_additional_program_headers (abfd
)
2571 /* If we are creating a shared library, then we have to create a
2572 PT_PHDR segment. HP's dynamic linker chokes without it. */
2573 s
= bfd_get_section_by_name (abfd
, ".interp");
2579 /* Allocate and initialize any program headers required by this
2582 The generic ELF code only creates PT_PHDRs for executables. The HP
2583 dynamic linker requires PT_PHDRs for dynamic libraries too.
2585 This allocates the PT_PHDR and initializes it in a manner suitable
2588 Note we do not have access to the link info structure here, so we have
2589 to guess whether or not we are building a shared library based on the
2590 existence of a .interp section. */
2593 elf64_hppa_modify_segment_map (abfd
)
2596 struct elf_segment_map
*m
;
2599 s
= bfd_get_section_by_name (abfd
, ".interp");
2602 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
2603 if (m
->p_type
== PT_PHDR
)
2607 m
= ((struct elf_segment_map
*)
2608 bfd_zalloc (abfd
, (bfd_size_type
) sizeof *m
));
2612 m
->p_type
= PT_PHDR
;
2613 m
->p_flags
= PF_R
| PF_X
;
2614 m
->p_flags_valid
= 1;
2615 m
->p_paddr_valid
= 1;
2616 m
->includes_phdrs
= 1;
2618 m
->next
= elf_tdata (abfd
)->segment_map
;
2619 elf_tdata (abfd
)->segment_map
= m
;
2623 for (m
= elf_tdata (abfd
)->segment_map
; m
!= NULL
; m
= m
->next
)
2624 if (m
->p_type
== PT_LOAD
)
2628 for (i
= 0; i
< m
->count
; i
++)
2630 /* The code "hint" is not really a hint. It is a requirement
2631 for certain versions of the HP dynamic linker. Worse yet,
2632 it must be set even if the shared library does not have
2633 any code in its "text" segment (thus the check for .hash
2634 to catch this situation). */
2635 if (m
->sections
[i
]->flags
& SEC_CODE
2636 || (strcmp (m
->sections
[i
]->name
, ".hash") == 0))
2637 m
->p_flags
|= (PF_X
| PF_HP_CODE
);
2644 /* Called when writing out an object file to decide the type of a
2647 elf64_hppa_elf_get_symbol_type (elf_sym
, type
)
2648 Elf_Internal_Sym
*elf_sym
;
2651 if (ELF_ST_TYPE (elf_sym
->st_info
) == STT_PARISC_MILLI
)
2652 return STT_PARISC_MILLI
;
2657 /* The hash bucket size is the standard one, namely 4. */
2659 const struct elf_size_info hppa64_elf_size_info
=
2661 sizeof (Elf64_External_Ehdr
),
2662 sizeof (Elf64_External_Phdr
),
2663 sizeof (Elf64_External_Shdr
),
2664 sizeof (Elf64_External_Rel
),
2665 sizeof (Elf64_External_Rela
),
2666 sizeof (Elf64_External_Sym
),
2667 sizeof (Elf64_External_Dyn
),
2668 sizeof (Elf_External_Note
),
2672 ELFCLASS64
, EV_CURRENT
,
2673 bfd_elf64_write_out_phdrs
,
2674 bfd_elf64_write_shdrs_and_ehdr
,
2675 bfd_elf64_write_relocs
,
2676 bfd_elf64_swap_symbol_out
,
2677 bfd_elf64_slurp_reloc_table
,
2678 bfd_elf64_slurp_symbol_table
,
2679 bfd_elf64_swap_dyn_in
,
2680 bfd_elf64_swap_dyn_out
,
2687 #define TARGET_BIG_SYM bfd_elf64_hppa_vec
2688 #define TARGET_BIG_NAME "elf64-hppa"
2689 #define ELF_ARCH bfd_arch_hppa
2690 #define ELF_MACHINE_CODE EM_PARISC
2691 /* This is not strictly correct. The maximum page size for PA2.0 is
2692 64M. But everything still uses 4k. */
2693 #define ELF_MAXPAGESIZE 0x1000
2694 #define bfd_elf64_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
2695 #define bfd_elf64_bfd_is_local_label_name elf_hppa_is_local_label_name
2696 #define elf_info_to_howto elf_hppa_info_to_howto
2697 #define elf_info_to_howto_rel elf_hppa_info_to_howto_rel
2699 #define elf_backend_section_from_shdr elf64_hppa_section_from_shdr
2700 #define elf_backend_object_p elf64_hppa_object_p
2701 #define elf_backend_final_write_processing \
2702 elf_hppa_final_write_processing
2703 #define elf_backend_fake_sections elf_hppa_fake_sections
2704 #define elf_backend_add_symbol_hook elf_hppa_add_symbol_hook
2706 #define elf_backend_relocate_section elf_hppa_relocate_section
2708 #define bfd_elf64_bfd_final_link elf_hppa_final_link
2710 #define elf_backend_create_dynamic_sections \
2711 elf64_hppa_create_dynamic_sections
2712 #define elf_backend_post_process_headers elf64_hppa_post_process_headers
2714 #define elf_backend_adjust_dynamic_symbol \
2715 elf64_hppa_adjust_dynamic_symbol
2717 #define elf_backend_size_dynamic_sections \
2718 elf64_hppa_size_dynamic_sections
2720 #define elf_backend_finish_dynamic_symbol \
2721 elf64_hppa_finish_dynamic_symbol
2722 #define elf_backend_finish_dynamic_sections \
2723 elf64_hppa_finish_dynamic_sections
2725 /* Stuff for the BFD linker: */
2726 #define bfd_elf64_bfd_link_hash_table_create \
2727 elf64_hppa_hash_table_create
2729 #define elf_backend_check_relocs \
2730 elf64_hppa_check_relocs
2732 #define elf_backend_size_info \
2733 hppa64_elf_size_info
2735 #define elf_backend_additional_program_headers \
2736 elf64_hppa_additional_program_headers
2738 #define elf_backend_modify_segment_map \
2739 elf64_hppa_modify_segment_map
2741 #define elf_backend_link_output_symbol_hook \
2742 elf64_hppa_link_output_symbol_hook
2744 #define elf_backend_want_got_plt 0
2745 #define elf_backend_plt_readonly 0
2746 #define elf_backend_want_plt_sym 0
2747 #define elf_backend_got_header_size 0
2748 #define elf_backend_plt_header_size 0
2749 #define elf_backend_type_change_ok true
2750 #define elf_backend_get_symbol_type elf64_hppa_elf_get_symbol_type
2752 #include "elf64-target.h"
2754 #undef TARGET_BIG_SYM
2755 #define TARGET_BIG_SYM bfd_elf64_hppa_linux_vec
2756 #undef TARGET_BIG_NAME
2757 #define TARGET_BIG_NAME "elf64-hppa-linux"
2759 #define INCLUDED_TARGET_FILE 1
2760 #include "elf64-target.h"