1 /* BFD backend for SunOS binaries.
2 Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #define TARGETNAME "a.out-sunos-big"
23 #define MY(OP) CAT(sunos_big_,OP)
29 /* Static routines defined in this file. */
31 static boolean sunos_read_dynamic_info
PARAMS ((bfd
*));
32 static long sunos_get_dynamic_symtab_upper_bound
PARAMS ((bfd
*));
33 static long sunos_canonicalize_dynamic_symtab
PARAMS ((bfd
*, asymbol
**));
34 static long sunos_get_dynamic_reloc_upper_bound
PARAMS ((bfd
*));
35 static long sunos_canonicalize_dynamic_reloc
36 PARAMS ((bfd
*, arelent
**, asymbol
**));
37 static struct bfd_hash_entry
*sunos_link_hash_newfunc
38 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
39 static struct bfd_link_hash_table
*sunos_link_hash_table_create
41 static boolean sunos_add_dynamic_symbols
42 PARAMS ((bfd
*, struct bfd_link_info
*));
43 static boolean sunos_add_one_symbol
44 PARAMS ((struct bfd_link_info
*, bfd
*, const char *, flagword
, asection
*,
45 bfd_vma
, const char *, boolean
, boolean
,
46 struct bfd_link_hash_entry
**));
47 static boolean sunos_scan_relocs
48 PARAMS ((struct bfd_link_info
*, bfd
*, asection
*, bfd_size_type
));
49 static boolean sunos_scan_std_relocs
50 PARAMS ((struct bfd_link_info
*, bfd
*, asection
*,
51 const struct reloc_std_external
*, bfd_size_type
));
52 static boolean sunos_scan_ext_relocs
53 PARAMS ((struct bfd_link_info
*, bfd
*, asection
*,
54 const struct reloc_ext_external
*, bfd_size_type
));
55 static boolean sunos_link_dynamic_object
56 PARAMS ((struct bfd_link_info
*, bfd
*));
57 static boolean sunos_write_dynamic_symbol
58 PARAMS ((bfd
*, struct bfd_link_info
*, struct aout_link_hash_entry
*));
59 static boolean sunos_check_dynamic_reloc
60 PARAMS ((struct bfd_link_info
*, bfd
*, asection
*,
61 struct aout_link_hash_entry
*, PTR
, boolean
*));
62 static boolean sunos_finish_dynamic_link
63 PARAMS ((bfd
*, struct bfd_link_info
*));
65 #define MY_get_dynamic_symtab_upper_bound sunos_get_dynamic_symtab_upper_bound
66 #define MY_canonicalize_dynamic_symtab sunos_canonicalize_dynamic_symtab
67 #define MY_get_dynamic_reloc_upper_bound sunos_get_dynamic_reloc_upper_bound
68 #define MY_canonicalize_dynamic_reloc sunos_canonicalize_dynamic_reloc
69 #define MY_bfd_link_hash_table_create sunos_link_hash_table_create
70 #define MY_add_dynamic_symbols sunos_add_dynamic_symbols
71 #define MY_add_one_symbol sunos_add_one_symbol
72 #define MY_link_dynamic_object sunos_link_dynamic_object
73 #define MY_write_dynamic_symbol sunos_write_dynamic_symbol
74 #define MY_check_dynamic_reloc sunos_check_dynamic_reloc
75 #define MY_finish_dynamic_link sunos_finish_dynamic_link
77 /* Include the usual a.out support. */
80 /* SunOS shared library support. We store a pointer to this structure
81 in obj_aout_dynamic_info (abfd). */
83 struct sunos_dynamic_info
85 /* Whether we found any dynamic information. */
87 /* Dynamic information. */
88 struct internal_sun4_dynamic_link dyninfo
;
89 /* Number of dynamic symbols. */
91 /* Read in nlists for dynamic symbols. */
92 struct external_nlist
*dynsym
;
93 /* asymbol structures for dynamic symbols. */
94 aout_symbol_type
*canonical_dynsym
;
95 /* Read in dynamic string table. */
97 /* Number of dynamic relocs. */
99 /* Read in dynamic relocs. This may be reloc_std_external or
100 reloc_ext_external. */
102 /* arelent structures for dynamic relocs. */
103 arelent
*canonical_dynrel
;
106 /* The hash table of dynamic symbols is composed of two word entries.
107 See include/aout/sun4.h for details. */
109 #define HASH_ENTRY_SIZE (2 * BYTES_IN_WORD)
111 /* Read in the basic dynamic information. This locates the __DYNAMIC
112 structure and uses it to find the dynamic_link structure. It
113 creates and saves a sunos_dynamic_info structure. If it can't find
114 __DYNAMIC, it sets the valid field of the sunos_dynamic_info
115 structure to false to avoid doing this work again. */
118 sunos_read_dynamic_info (abfd
)
121 struct sunos_dynamic_info
*info
;
124 struct external_sun4_dynamic dyninfo
;
125 unsigned long dynver
;
126 struct external_sun4_dynamic_link linkinfo
;
128 if (obj_aout_dynamic_info (abfd
) != (PTR
) NULL
)
131 if ((abfd
->flags
& DYNAMIC
) == 0)
133 bfd_set_error (bfd_error_invalid_operation
);
137 info
= ((struct sunos_dynamic_info
*)
138 bfd_zalloc (abfd
, sizeof (struct sunos_dynamic_info
)));
141 bfd_set_error (bfd_error_no_memory
);
147 info
->canonical_dynsym
= NULL
;
149 info
->canonical_dynrel
= NULL
;
150 obj_aout_dynamic_info (abfd
) = (PTR
) info
;
152 /* This code used to look for the __DYNAMIC symbol to locate the dynamic
154 However this inhibits recovering the dynamic symbols from a
155 stripped object file, so blindly assume that the dynamic linking
156 information is located at the start of the data section.
157 We could verify this assumption later by looking through the dynamic
158 symbols for the __DYNAMIC symbol. */
159 if ((abfd
->flags
& DYNAMIC
) == 0)
161 if (! bfd_get_section_contents (abfd
, obj_datasec (abfd
), (PTR
) &dyninfo
,
162 (file_ptr
) 0, sizeof dyninfo
))
165 dynver
= GET_WORD (abfd
, dyninfo
.ld_version
);
166 if (dynver
!= 2 && dynver
!= 3)
169 dynoff
= GET_WORD (abfd
, dyninfo
.ld
);
171 /* dynoff is a virtual address. It is probably always in the .data
172 section, but this code should work even if it moves. */
173 if (dynoff
< bfd_get_section_vma (abfd
, obj_datasec (abfd
)))
174 dynsec
= obj_textsec (abfd
);
176 dynsec
= obj_datasec (abfd
);
177 dynoff
-= bfd_get_section_vma (abfd
, dynsec
);
178 if (dynoff
< 0 || dynoff
> bfd_section_size (abfd
, dynsec
))
181 /* This executable appears to be dynamically linked in a way that we
183 if (! bfd_get_section_contents (abfd
, dynsec
, (PTR
) &linkinfo
, dynoff
,
184 (bfd_size_type
) sizeof linkinfo
))
187 /* Swap in the dynamic link information. */
188 info
->dyninfo
.ld_loaded
= GET_WORD (abfd
, linkinfo
.ld_loaded
);
189 info
->dyninfo
.ld_need
= GET_WORD (abfd
, linkinfo
.ld_need
);
190 info
->dyninfo
.ld_rules
= GET_WORD (abfd
, linkinfo
.ld_rules
);
191 info
->dyninfo
.ld_got
= GET_WORD (abfd
, linkinfo
.ld_got
);
192 info
->dyninfo
.ld_plt
= GET_WORD (abfd
, linkinfo
.ld_plt
);
193 info
->dyninfo
.ld_rel
= GET_WORD (abfd
, linkinfo
.ld_rel
);
194 info
->dyninfo
.ld_hash
= GET_WORD (abfd
, linkinfo
.ld_hash
);
195 info
->dyninfo
.ld_stab
= GET_WORD (abfd
, linkinfo
.ld_stab
);
196 info
->dyninfo
.ld_stab_hash
= GET_WORD (abfd
, linkinfo
.ld_stab_hash
);
197 info
->dyninfo
.ld_buckets
= GET_WORD (abfd
, linkinfo
.ld_buckets
);
198 info
->dyninfo
.ld_symbols
= GET_WORD (abfd
, linkinfo
.ld_symbols
);
199 info
->dyninfo
.ld_symb_size
= GET_WORD (abfd
, linkinfo
.ld_symb_size
);
200 info
->dyninfo
.ld_text
= GET_WORD (abfd
, linkinfo
.ld_text
);
201 info
->dyninfo
.ld_plt_sz
= GET_WORD (abfd
, linkinfo
.ld_plt_sz
);
203 /* The only way to get the size of the symbol information appears to
204 be to determine the distance between it and the string table. */
205 info
->dynsym_count
= ((info
->dyninfo
.ld_symbols
- info
->dyninfo
.ld_stab
)
206 / EXTERNAL_NLIST_SIZE
);
207 BFD_ASSERT (info
->dynsym_count
* EXTERNAL_NLIST_SIZE
208 == info
->dyninfo
.ld_symbols
- info
->dyninfo
.ld_stab
);
210 /* Similarly, the relocs end at the hash table. */
211 info
->dynrel_count
= ((info
->dyninfo
.ld_hash
- info
->dyninfo
.ld_rel
)
212 / obj_reloc_entry_size (abfd
));
213 BFD_ASSERT (info
->dynrel_count
* obj_reloc_entry_size (abfd
)
214 == info
->dyninfo
.ld_hash
- info
->dyninfo
.ld_rel
);
221 /* Return the amount of memory required for the dynamic symbols. */
224 sunos_get_dynamic_symtab_upper_bound (abfd
)
227 struct sunos_dynamic_info
*info
;
229 if (! sunos_read_dynamic_info (abfd
))
232 info
= (struct sunos_dynamic_info
*) obj_aout_dynamic_info (abfd
);
235 bfd_set_error (bfd_error_no_symbols
);
239 return (info
->dynsym_count
+ 1) * sizeof (asymbol
*);
242 /* Read in the dynamic symbols. */
245 sunos_canonicalize_dynamic_symtab (abfd
, storage
)
249 struct sunos_dynamic_info
*info
;
252 /* Get the general dynamic information. */
253 if (obj_aout_dynamic_info (abfd
) == NULL
)
255 if (! sunos_read_dynamic_info (abfd
))
259 info
= (struct sunos_dynamic_info
*) obj_aout_dynamic_info (abfd
);
262 bfd_set_error (bfd_error_no_symbols
);
266 /* Get the dynamic nlist structures. */
267 if (info
->dynsym
== (struct external_nlist
*) NULL
)
269 info
->dynsym
= ((struct external_nlist
*)
272 * EXTERNAL_NLIST_SIZE
)));
273 if (info
->dynsym
== NULL
&& info
->dynsym_count
!= 0)
275 bfd_set_error (bfd_error_no_memory
);
278 if (bfd_seek (abfd
, info
->dyninfo
.ld_stab
, SEEK_SET
) != 0
279 || (bfd_read ((PTR
) info
->dynsym
, info
->dynsym_count
,
280 EXTERNAL_NLIST_SIZE
, abfd
)
281 != info
->dynsym_count
* EXTERNAL_NLIST_SIZE
))
283 if (info
->dynsym
!= NULL
)
285 bfd_release (abfd
, info
->dynsym
);
292 /* Get the dynamic strings. */
293 if (info
->dynstr
== (char *) NULL
)
295 info
->dynstr
= (char *) bfd_alloc (abfd
, info
->dyninfo
.ld_symb_size
);
296 if (info
->dynstr
== NULL
&& info
->dyninfo
.ld_symb_size
!= 0)
298 bfd_set_error (bfd_error_no_memory
);
301 if (bfd_seek (abfd
, info
->dyninfo
.ld_symbols
, SEEK_SET
) != 0
302 || (bfd_read ((PTR
) info
->dynstr
, 1, info
->dyninfo
.ld_symb_size
,
304 != info
->dyninfo
.ld_symb_size
))
306 if (info
->dynstr
!= NULL
)
308 bfd_release (abfd
, info
->dynstr
);
315 #ifdef CHECK_DYNAMIC_HASH
316 /* Check my understanding of the dynamic hash table by making sure
317 that each symbol can be located in the hash table. */
319 bfd_size_type table_size
;
323 if (info
->dyninfo
.ld_buckets
> info
->dynsym_count
)
325 table_size
= info
->dyninfo
.ld_stab
- info
->dyninfo
.ld_hash
;
326 table
= (bfd_byte
*) malloc (table_size
);
327 if (table
== NULL
&& table_size
!= 0)
329 if (bfd_seek (abfd
, info
->dyninfo
.ld_hash
, SEEK_SET
) != 0
330 || bfd_read ((PTR
) table
, 1, table_size
, abfd
) != table_size
)
332 for (i
= 0; i
< info
->dynsym_count
; i
++)
337 name
= ((unsigned char *) info
->dynstr
338 + GET_WORD (abfd
, info
->dynsym
[i
].e_strx
));
340 while (*name
!= '\0')
341 hash
= (hash
<< 1) + *name
++;
343 hash
%= info
->dyninfo
.ld_buckets
;
344 while (GET_WORD (abfd
, table
+ hash
* HASH_ENTRY_SIZE
) != i
)
346 hash
= GET_WORD (abfd
,
347 table
+ hash
* HASH_ENTRY_SIZE
+ BYTES_IN_WORD
);
348 if (hash
== 0 || hash
>= table_size
/ HASH_ENTRY_SIZE
)
354 #endif /* CHECK_DYNAMIC_HASH */
356 /* Get the asymbol structures corresponding to the dynamic nlist
358 if (info
->canonical_dynsym
== (aout_symbol_type
*) NULL
)
360 info
->canonical_dynsym
= ((aout_symbol_type
*)
363 * sizeof (aout_symbol_type
))));
364 if (info
->canonical_dynsym
== NULL
&& info
->dynsym_count
!= 0)
366 bfd_set_error (bfd_error_no_memory
);
370 if (! aout_32_translate_symbol_table (abfd
, info
->canonical_dynsym
,
371 info
->dynsym
, info
->dynsym_count
,
373 info
->dyninfo
.ld_symb_size
,
376 if (info
->canonical_dynsym
!= NULL
)
378 bfd_release (abfd
, info
->canonical_dynsym
);
379 info
->canonical_dynsym
= NULL
;
385 /* Return pointers to the dynamic asymbol structures. */
386 for (i
= 0; i
< info
->dynsym_count
; i
++)
387 *storage
++ = (asymbol
*) (info
->canonical_dynsym
+ i
);
390 return info
->dynsym_count
;
393 /* Return the amount of memory required for the dynamic relocs. */
396 sunos_get_dynamic_reloc_upper_bound (abfd
)
399 struct sunos_dynamic_info
*info
;
401 if (! sunos_read_dynamic_info (abfd
))
404 info
= (struct sunos_dynamic_info
*) obj_aout_dynamic_info (abfd
);
407 bfd_set_error (bfd_error_no_symbols
);
411 return (info
->dynrel_count
+ 1) * sizeof (arelent
*);
414 /* Read in the dynamic relocs. */
417 sunos_canonicalize_dynamic_reloc (abfd
, storage
, syms
)
422 struct sunos_dynamic_info
*info
;
425 /* Get the general dynamic information. */
426 if (obj_aout_dynamic_info (abfd
) == (PTR
) NULL
)
428 if (! sunos_read_dynamic_info (abfd
))
432 info
= (struct sunos_dynamic_info
*) obj_aout_dynamic_info (abfd
);
435 bfd_set_error (bfd_error_no_symbols
);
439 /* Get the dynamic reloc information. */
440 if (info
->dynrel
== NULL
)
442 info
->dynrel
= (PTR
) bfd_alloc (abfd
,
444 * obj_reloc_entry_size (abfd
)));
445 if (info
->dynrel
== NULL
&& info
->dynrel_count
!= 0)
447 bfd_set_error (bfd_error_no_memory
);
450 if (bfd_seek (abfd
, info
->dyninfo
.ld_rel
, SEEK_SET
) != 0
451 || (bfd_read ((PTR
) info
->dynrel
, info
->dynrel_count
,
452 obj_reloc_entry_size (abfd
), abfd
)
453 != info
->dynrel_count
* obj_reloc_entry_size (abfd
)))
455 if (info
->dynrel
!= NULL
)
457 bfd_release (abfd
, info
->dynrel
);
464 /* Get the arelent structures corresponding to the dynamic reloc
466 if (info
->canonical_dynrel
== (arelent
*) NULL
)
470 info
->canonical_dynrel
= ((arelent
*)
473 * sizeof (arelent
))));
474 if (info
->canonical_dynrel
== NULL
&& info
->dynrel_count
!= 0)
476 bfd_set_error (bfd_error_no_memory
);
480 to
= info
->canonical_dynrel
;
482 if (obj_reloc_entry_size (abfd
) == RELOC_EXT_SIZE
)
484 register struct reloc_ext_external
*p
;
485 struct reloc_ext_external
*pend
;
487 p
= (struct reloc_ext_external
*) info
->dynrel
;
488 pend
= p
+ info
->dynrel_count
;
489 for (; p
< pend
; p
++, to
++)
490 NAME(aout
,swap_ext_reloc_in
) (abfd
, p
, to
, syms
);
494 register struct reloc_std_external
*p
;
495 struct reloc_std_external
*pend
;
497 p
= (struct reloc_std_external
*) info
->dynrel
;
498 pend
= p
+ info
->dynrel_count
;
499 for (; p
< pend
; p
++, to
++)
500 NAME(aout
,swap_std_reloc_in
) (abfd
, p
, to
, syms
);
504 /* Return pointers to the dynamic arelent structures. */
505 for (i
= 0; i
< info
->dynrel_count
; i
++)
506 *storage
++ = info
->canonical_dynrel
+ i
;
509 return info
->dynrel_count
;
512 /* Code to handle linking of SunOS shared libraries. */
514 /* A SPARC procedure linkage table entry is 12 bytes. The first entry
515 in the table is a jump which is filled in by the runtime linker.
516 The remaining entries are branches back to the first entry,
517 followed by an index into the relocation table encoded to look like
520 #define SPARC_PLT_ENTRY_SIZE (12)
522 static bfd_byte sparc_plt_first_entry
[SPARC_PLT_ENTRY_SIZE
] =
524 /* sethi %hi(0),%g1; address filled in by runtime linker. */
526 /* jmp %g1; offset filled in by runtime linker. */
532 /* save %sp, -96, %sp */
533 #define SPARC_PLT_ENTRY_WORD0 0x9de3bfa0
534 /* call; address filled in later. */
535 #define SPARC_PLT_ENTRY_WORD1 0x40000000
536 /* sethi; reloc index filled in later. */
537 #define SPARC_PLT_ENTRY_WORD2 0x01000000
539 /* An m68k procedure linkage table entry is 8 bytes. The first entry
540 in the table is a jump which is filled in the by the runtime
541 linker. The remaining entries are branches back to the first
542 entry, followed by a two byte index into the relocation table. */
544 #define M68K_PLT_ENTRY_SIZE (8)
546 static bfd_byte m68k_plt_first_entry
[M68K_PLT_ENTRY_SIZE
] =
550 /* Filled in by runtime linker with a magic address. */
557 #define M68K_PLT_ENTRY_WORD0 (0x61ff)
558 /* Remaining words filled in later. */
560 /* An entry in the SunOS linker hash table. */
562 struct sunos_link_hash_entry
564 struct aout_link_hash_entry root
;
566 /* If this is a dynamic symbol, this is its index into the dynamic
567 symbol table. This is initialized to -1. As the linker looks at
568 the input files, it changes this to -2 if it will be added to the
569 dynamic symbol table. After all the input files have been seen,
570 the linker will know whether to build a dynamic symbol table; if
571 it does build one, this becomes the index into the table. */
574 /* If this is a dynamic symbol, this is the index of the name in the
575 dynamic symbol string table. */
578 /* Some linker flags. */
580 /* Symbol is referenced by a regular object. */
581 #define SUNOS_REF_REGULAR 01
582 /* Symbol is defined by a regular object. */
583 #define SUNOS_DEF_REGULAR 02
584 /* Symbol is referenced by a dynamic object. */
585 #define SUNOS_REF_DYNAMIC 010
586 /* Symbol is defined by a dynamic object. */
587 #define SUNOS_DEF_DYNAMIC 020
590 /* The SunOS linker hash table. */
592 struct sunos_link_hash_table
594 struct aout_link_hash_table root
;
596 /* The first dynamic object found during the link. */
599 /* The number of dynamic symbols. */
602 /* The number of buckets in the hash table. */
606 /* Routine to create an entry in an SunOS link hash table. */
608 static struct bfd_hash_entry
*
609 sunos_link_hash_newfunc (entry
, table
, string
)
610 struct bfd_hash_entry
*entry
;
611 struct bfd_hash_table
*table
;
614 struct sunos_link_hash_entry
*ret
= (struct sunos_link_hash_entry
*) entry
;
616 /* Allocate the structure if it has not already been allocated by a
618 if (ret
== (struct sunos_link_hash_entry
*) NULL
)
619 ret
= ((struct sunos_link_hash_entry
*)
620 bfd_hash_allocate (table
, sizeof (struct sunos_link_hash_entry
)));
621 if (ret
== (struct sunos_link_hash_entry
*) NULL
)
623 bfd_set_error (bfd_error_no_memory
);
624 return (struct bfd_hash_entry
*) ret
;
627 /* Call the allocation method of the superclass. */
628 ret
= ((struct sunos_link_hash_entry
*)
629 NAME(aout
,link_hash_newfunc
) ((struct bfd_hash_entry
*) ret
,
633 /* Set local fields. */
635 ret
->dynstr_index
= -1;
639 return (struct bfd_hash_entry
*) ret
;
642 /* Create a SunOS link hash table. */
644 static struct bfd_link_hash_table
*
645 sunos_link_hash_table_create (abfd
)
648 struct sunos_link_hash_table
*ret
;
650 ret
= ((struct sunos_link_hash_table
*)
651 malloc (sizeof (struct sunos_link_hash_table
)));
652 if (ret
== (struct sunos_link_hash_table
*) NULL
)
654 bfd_set_error (bfd_error_no_memory
);
655 return (struct bfd_link_hash_table
*) NULL
;
657 if (! NAME(aout
,link_hash_table_init
) (&ret
->root
, abfd
,
658 sunos_link_hash_newfunc
))
661 return (struct bfd_link_hash_table
*) NULL
;
665 ret
->dynsymcount
= 0;
666 ret
->bucketcount
= 0;
668 return &ret
->root
.root
;
671 /* Look up an entry in an SunOS link hash table. */
673 #define sunos_link_hash_lookup(table, string, create, copy, follow) \
674 ((struct sunos_link_hash_entry *) \
675 aout_link_hash_lookup (&(table)->root, (string), (create), (copy),\
678 /* Traverse a SunOS link hash table. */
680 #define sunos_link_hash_traverse(table, func, info) \
681 (aout_link_hash_traverse \
683 (boolean (*) PARAMS ((struct aout_link_hash_entry *, PTR))) (func), \
686 /* Get the SunOS link hash table from the info structure. This is
689 #define sunos_hash_table(p) ((struct sunos_link_hash_table *) ((p)->hash))
691 static boolean sunos_scan_dynamic_symbol
692 PARAMS ((struct sunos_link_hash_entry
*, PTR
));
694 /* Add dynamic symbols during a link. This is called by the a.out
695 backend linker when it encounters an object with the DYNAMIC flag
699 sunos_add_dynamic_symbols (abfd
, info
)
701 struct bfd_link_info
*info
;
705 /* We do not want to include the sections in a dynamic object in the
706 output file. We hack by simply clobbering the list of sections
707 in the BFD. This could be handled more cleanly by, say, a new
708 section flag; the existing SEC_NEVER_LOAD flag is not the one we
709 want, because that one still implies that the section takes up
710 space in the output file. */
711 abfd
->sections
= NULL
;
713 /* The native linker seems to just ignore dynamic objects when -r is
715 if (info
->relocateable
)
718 /* There's no hope of using a dynamic object which does not exactly
719 match the format of the output file. */
720 if (info
->hash
->creator
!= abfd
->xvec
)
722 bfd_set_error (bfd_error_invalid_operation
);
726 /* If this is the first dynamic object, create some new sections to
727 hold dynamic linking information. We need to put these sections
728 somewhere, and the first dynamic object is as good a place as
729 any. The linker script will look for these special section names
730 and put them in the right place in the output file. See
731 include/aout/sun4.h for more details of the dynamic linking
733 if (sunos_hash_table (info
)->dynobj
== NULL
)
738 sunos_hash_table (info
)->dynobj
= abfd
;
740 flags
= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
742 /* The .dynamic section holds the basic dynamic information: the
743 sun4_dynamic structure, the dynamic debugger information, and
744 the sun4_dynamic_link structure. */
745 s
= bfd_make_section (abfd
, ".dynamic");
747 || ! bfd_set_section_flags (abfd
, s
, flags
)
748 || ! bfd_set_section_alignment (abfd
, s
, 2))
752 /* The .need section holds the list of names of shared objets
753 which must be included at runtime. The address of this
754 section is put in the ld_need field. */
755 s
= bfd_make_section (abfd
, ".need");
757 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
758 || ! bfd_set_section_alignment (abfd
, s
, 2))
761 /* The .rules section holds the path to search for shared
762 objects. The address of this section is put in the ld_rules
764 s
= bfd_make_section (abfd
, ".rules");
766 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
767 || ! bfd_set_section_alignment (abfd
, s
, 2))
770 /* The .got section holds the global offset table. I don't
771 really know how this works, actually. It seems to only be
772 used for PIC code. The address minus four is put in the
774 s
= bfd_make_section (abfd
, ".got");
776 || ! bfd_set_section_flags (abfd
, s
, flags
)
777 || ! bfd_set_section_alignment (abfd
, s
, 2))
779 s
->_raw_size
= BYTES_IN_WORD
;
781 /* The .plt section holds the procedure linkage table. The
782 address is put in the ld_plt field. */
783 s
= bfd_make_section (abfd
, ".plt");
785 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_CODE
)
786 || ! bfd_set_section_alignment (abfd
, s
, 2))
789 /* The .dynrel section holds the dynamic relocs. The address is
790 put in the ld_rel field. */
791 s
= bfd_make_section (abfd
, ".dynrel");
793 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
794 || ! bfd_set_section_alignment (abfd
, s
, 2))
797 /* The .hash section holds the dynamic hash table. The address
798 is put in the ld_hash field. */
799 s
= bfd_make_section (abfd
, ".hash");
801 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
802 || ! bfd_set_section_alignment (abfd
, s
, 2))
805 /* The .dynsym section holds the dynamic symbols. The address
806 is put in the ld_stab field. */
807 s
= bfd_make_section (abfd
, ".dynsym");
809 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
810 || ! bfd_set_section_alignment (abfd
, s
, 2))
813 /* The .dynstr section holds the dynamic symbol string table.
814 The address is put in the ld_symbols field. */
815 s
= bfd_make_section (abfd
, ".dynstr");
817 || ! bfd_set_section_flags (abfd
, s
, flags
| SEC_READONLY
)
818 || ! bfd_set_section_alignment (abfd
, s
, 2))
825 /* Function to add a single symbol to the linker hash table. This is
826 a wrapper around _bfd_generic_link_add_one_symbol which handles the
827 tweaking needed for dynamic linking support. */
830 sunos_add_one_symbol (info
, abfd
, name
, flags
, section
, value
, string
,
831 copy
, collect
, hashp
)
832 struct bfd_link_info
*info
;
841 struct bfd_link_hash_entry
**hashp
;
843 struct sunos_link_hash_entry
*h
;
846 h
= sunos_link_hash_lookup (sunos_hash_table (info
), name
, true, copy
,
852 *hashp
= (struct bfd_link_hash_entry
*) h
;
854 /* Treat a common symbol in a dynamic object as an undefined symbol.
855 We don't want to allocate space in .bss for it. */
856 if ((abfd
->flags
& DYNAMIC
) != 0
857 && section
== &bfd_com_section
)
858 section
= &bfd_und_section
;
860 if (section
!= &bfd_und_section
861 && h
->root
.root
.type
!= bfd_link_hash_new
862 && h
->root
.root
.type
!= bfd_link_hash_undefined
)
864 /* We are defining the symbol, and it is already defined. This
865 is a potential multiple definition error. */
866 if ((abfd
->flags
& DYNAMIC
) != 0)
868 /* The definition we are adding is from a dynamic object.
869 We do not want this new definition to override the
870 existing definition, so we pretend it is just a
872 section
= &bfd_und_section
;
874 else if ((h
->root
.root
.type
== bfd_link_hash_defined
875 && (h
->root
.root
.u
.def
.section
->owner
->flags
& DYNAMIC
) != 0)
876 || (h
->root
.root
.type
== bfd_link_hash_common
877 && ((h
->root
.root
.u
.c
.section
->owner
->flags
& DYNAMIC
)
880 /* The existing definition is from a dynamic object. We
881 want to override it with the definition we just found.
882 Clobber the existing definition. */
883 h
->root
.root
.type
= bfd_link_hash_new
;
887 /* Do the usual procedure for adding a symbol. */
888 if (! _bfd_generic_link_add_one_symbol (info
, abfd
, name
, flags
, section
,
889 value
, string
, copy
, collect
,
893 /* Set a flag in the hash table entry indicating the type of
894 reference or definition we just found. Keep a count of the
895 number of dynamic symbols we find. A dynamic symbol is one which
896 is referenced or defined by both a regular object and a shared
898 if ((abfd
->flags
& DYNAMIC
) == 0)
900 if (section
== &bfd_und_section
)
901 new_flag
= SUNOS_REF_REGULAR
;
903 new_flag
= SUNOS_DEF_REGULAR
;
907 if (section
== &bfd_und_section
)
908 new_flag
= SUNOS_REF_DYNAMIC
;
910 new_flag
= SUNOS_DEF_DYNAMIC
;
912 h
->flags
|= new_flag
;
915 && (h
->flags
& (SUNOS_DEF_REGULAR
| SUNOS_REF_REGULAR
)) != 0)
917 ++sunos_hash_table (info
)->dynsymcount
;
924 /* Record an assignment made to a symbol by a linker script. We need
925 this in case some dynamic object refers to this symbol. */
928 bfd_sunos_record_link_assignment (output_bfd
, info
, name
)
930 struct bfd_link_info
*info
;
933 struct sunos_link_hash_entry
*h
;
935 /* This is called after we have examined all the input objects. If
936 the symbol does not exist, it merely means that no object refers
937 to it, and we can just ignore it at this point. */
938 h
= sunos_link_hash_lookup (sunos_hash_table (info
), name
,
939 false, false, false);
943 h
->flags
|= SUNOS_DEF_REGULAR
;
945 if (h
->dynindx
== -1)
947 ++sunos_hash_table (info
)->dynsymcount
;
954 /* Set up the sizes and contents of the dynamic sections created in
955 sunos_add_dynamic_symbols. This is called by the SunOS linker
956 emulation before_allocation routine. We must set the sizes of the
957 sections before the linker sets the addresses of the various
958 sections. This unfortunately requires reading all the relocs so
959 that we can work out which ones need to become dynamic relocs. If
960 info->keep_memory is true, we keep the relocs in memory; otherwise,
961 we discard them, and will read them again later. */
964 bfd_sunos_size_dynamic_sections (output_bfd
, info
, sdynptr
, sneedptr
,
967 struct bfd_link_info
*info
;
970 asection
**srulesptr
;
984 dynobj
= sunos_hash_table (info
)->dynobj
;
985 dynsymcount
= sunos_hash_table (info
)->dynsymcount
;
987 /* If there were no dynamic objects in the link, there is nothing to
992 /* The .dynamic section is always the same size. */
993 s
= bfd_get_section_by_name (dynobj
, ".dynamic");
994 BFD_ASSERT (s
!= NULL
);
995 s
->_raw_size
= (sizeof (struct external_sun4_dynamic
)
996 + EXTERNAL_SUN4_DYNAMIC_DEBUGGER_SIZE
997 + sizeof (struct external_sun4_dynamic_link
));
999 /* Set the size of the .dynsym and .hash sections. We counted the
1000 number of dynamic symbols as we read the input files. We will
1001 build the dynamic symbol table (.dynsym) and the hash table
1002 (.hash) when we build the final symbol table, because until then
1003 we do not know the correct value to give the symbols. We build
1004 the dynamic symbol string table (.dynstr) in a traversal of the
1005 symbol table using sunos_scan_dynamic_symbol. */
1006 s
= bfd_get_section_by_name (dynobj
, ".dynsym");
1007 BFD_ASSERT (s
!= NULL
);
1008 s
->_raw_size
= dynsymcount
* sizeof (struct external_nlist
);
1009 s
->contents
= (bfd_byte
*) bfd_alloc (output_bfd
, s
->_raw_size
);
1010 if (s
->contents
== NULL
&& s
->_raw_size
!= 0)
1012 bfd_set_error (bfd_error_no_memory
);
1016 /* The number of buckets is just the number of symbols divided by
1017 four. The compute the final size of the hash table, we must
1018 actually compute the hash table. Normally we need exactly as
1019 many entries in the hash table as there are dynamic symbols, but
1020 if some of the buckets are not used we will need additional
1021 entries. In the worse case, every symbol will hash to the same
1022 bucket, and we will need BUCKETCOUNT - 1 extra entries. */
1023 if (dynsymcount
>= 4)
1024 bucketcount
= dynsymcount
/ 4;
1025 else if (dynsymcount
> 0)
1026 bucketcount
= dynsymcount
;
1029 s
= bfd_get_section_by_name (dynobj
, ".hash");
1030 BFD_ASSERT (s
!= NULL
);
1031 hashalloc
= (dynsymcount
+ bucketcount
- 1) * HASH_ENTRY_SIZE
;
1032 s
->contents
= (bfd_byte
*) bfd_alloc (dynobj
, hashalloc
);
1033 if (s
->contents
== NULL
&& dynsymcount
> 0)
1035 bfd_set_error (bfd_error_no_memory
);
1038 memset (s
->contents
, 0, hashalloc
);
1039 for (i
= 0; i
< bucketcount
; i
++)
1040 PUT_WORD (output_bfd
, (bfd_vma
) -1, s
->contents
+ i
* HASH_ENTRY_SIZE
);
1041 s
->_raw_size
= bucketcount
* HASH_ENTRY_SIZE
;
1043 sunos_hash_table (info
)->bucketcount
= bucketcount
;
1045 /* Look through all the input BFD's and read their relocs. It would
1046 be better if we didn't have to do this, but there is no other way
1047 to determine the number of dynamic relocs we need, and, more
1048 importantly, there is no other way to know which symbols should
1049 get an entry in the procedure linkage table. */
1050 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
1052 if ((sub
->flags
& DYNAMIC
) == 0)
1054 if (! sunos_scan_relocs (info
, sub
, obj_textsec (sub
),
1055 exec_hdr (sub
)->a_trsize
)
1056 || ! sunos_scan_relocs (info
, sub
, obj_datasec (sub
),
1057 exec_hdr (sub
)->a_drsize
))
1062 /* Scan all the symbols, place them in the dynamic symbol table, and
1063 build the dynamic hash table. We reuse dynsymcount as a counter
1064 for the number of symbols we have added so far. */
1065 sunos_hash_table (info
)->dynsymcount
= 0;
1066 sunos_link_hash_traverse (sunos_hash_table (info
),
1067 sunos_scan_dynamic_symbol
,
1069 BFD_ASSERT (sunos_hash_table (info
)->dynsymcount
== dynsymcount
);
1071 /* The SunOS native linker seems to align the total size of the
1072 symbol strings to a multiple of 8. I don't know if this is
1073 important, but it can't hurt much. */
1074 s
= bfd_get_section_by_name (dynobj
, ".dynstr");
1075 BFD_ASSERT (s
!= NULL
);
1076 if ((s
->_raw_size
& 7) != 0)
1081 add
= 8 - (s
->_raw_size
& 7);
1082 contents
= (bfd_byte
*) realloc (s
->contents
, s
->_raw_size
+ add
);
1083 if (contents
== NULL
)
1085 bfd_set_error (bfd_error_no_memory
);
1088 memset (contents
+ s
->_raw_size
, 0, add
);
1089 s
->contents
= contents
;
1090 s
->_raw_size
+= add
;
1093 /* Now that we have worked out the sizes of the procedure linkage
1094 table and the dynamic relocs, allocate storage for them. */
1095 s
= bfd_get_section_by_name (dynobj
, ".plt");
1096 BFD_ASSERT (s
!= NULL
);
1097 if (s
->_raw_size
!= 0)
1099 s
->contents
= (bfd_byte
*) bfd_alloc (dynobj
, s
->_raw_size
);
1100 if (s
->contents
== NULL
)
1102 bfd_set_error (bfd_error_no_memory
);
1106 /* Fill in the first entry in the table. */
1107 switch (bfd_get_arch (dynobj
))
1109 case bfd_arch_sparc
:
1110 memcpy (s
->contents
, sparc_plt_first_entry
, SPARC_PLT_ENTRY_SIZE
);
1114 memcpy (s
->contents
, m68k_plt_first_entry
, M68K_PLT_ENTRY_SIZE
);
1122 s
= bfd_get_section_by_name (dynobj
, ".dynrel");
1123 if (s
->_raw_size
!= 0)
1125 s
->contents
= (bfd_byte
*) bfd_alloc (dynobj
, s
->_raw_size
);
1126 if (s
->contents
== NULL
)
1128 bfd_set_error (bfd_error_no_memory
);
1132 /* We use the reloc_count field to keep track of how many of the
1133 relocs we have output so far. */
1136 /* Make space for the global offset table. */
1137 s
= bfd_get_section_by_name (dynobj
, ".got");
1138 s
->contents
= (bfd_byte
*) bfd_alloc (dynobj
, s
->_raw_size
);
1139 if (s
->contents
== NULL
)
1141 bfd_set_error (bfd_error_no_memory
);
1145 *sdynptr
= bfd_get_section_by_name (dynobj
, ".dynamic");
1146 *sneedptr
= bfd_get_section_by_name (dynobj
, ".need");
1147 *srulesptr
= bfd_get_section_by_name (dynobj
, ".rules");
1152 /* Scan the relocs for an input section. */
1155 sunos_scan_relocs (info
, abfd
, sec
, rel_size
)
1156 struct bfd_link_info
*info
;
1159 bfd_size_type rel_size
;
1162 PTR free_relocs
= NULL
;
1167 if (! info
->keep_memory
)
1168 relocs
= free_relocs
= malloc (rel_size
);
1171 aout_section_data (sec
) =
1172 ((struct aout_section_data_struct
*)
1173 bfd_alloc (abfd
, sizeof (struct aout_section_data_struct
)));
1174 if (aout_section_data (sec
) == NULL
)
1177 relocs
= aout_section_data (sec
)->relocs
= malloc (rel_size
);
1181 bfd_set_error (bfd_error_no_memory
);
1185 if (bfd_seek (abfd
, sec
->rel_filepos
, SEEK_SET
) != 0
1186 || bfd_read (relocs
, 1, rel_size
, abfd
) != rel_size
)
1189 if (obj_reloc_entry_size (abfd
) == RELOC_STD_SIZE
)
1191 if (! sunos_scan_std_relocs (info
, abfd
, sec
,
1192 (struct reloc_std_external
*) relocs
,
1198 if (! sunos_scan_ext_relocs (info
, abfd
, sec
,
1199 (struct reloc_ext_external
*) relocs
,
1204 if (free_relocs
!= NULL
)
1210 if (free_relocs
!= NULL
)
1215 /* Scan the relocs for an input section using standard relocs. We
1216 need to figure out what to do for each reloc against a dynamic
1217 symbol. If the symbol is in the .text section, an entry is made in
1218 the procedure linkage table. Note that this will do the wrong
1219 thing if the symbol is actually data; I don't think the Sun 3
1220 native linker handles this case correctly either. If the symbol is
1221 not in the .text section, we must preserve the reloc as a dynamic
1222 reloc. FIXME: We should also handle the PIC relocs here by
1223 building global offset table entries. */
1226 sunos_scan_std_relocs (info
, abfd
, sec
, relocs
, rel_size
)
1227 struct bfd_link_info
*info
;
1230 const struct reloc_std_external
*relocs
;
1231 bfd_size_type rel_size
;
1236 struct sunos_link_hash_entry
**sym_hashes
;
1237 const struct reloc_std_external
*rel
, *relend
;
1239 /* We only know how to handle m68k plt entries. */
1240 if (bfd_get_arch (abfd
) != bfd_arch_m68k
)
1242 bfd_set_error (bfd_error_invalid_target
);
1246 dynobj
= sunos_hash_table (info
)->dynobj
;
1247 splt
= bfd_get_section_by_name (dynobj
, ".plt");
1248 srel
= bfd_get_section_by_name (dynobj
, ".dynrel");
1249 BFD_ASSERT (splt
!= NULL
&& srel
!= NULL
);
1250 sym_hashes
= (struct sunos_link_hash_entry
**) obj_aout_sym_hashes (abfd
);
1252 relend
= relocs
+ rel_size
/ RELOC_STD_SIZE
;
1253 for (rel
= relocs
; rel
< relend
; rel
++)
1256 struct sunos_link_hash_entry
*h
;
1258 /* We only want relocs against external symbols. */
1259 if (abfd
->xvec
->header_byteorder_big_p
)
1261 if ((rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
) == 0)
1266 if ((rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
) == 0)
1270 /* Get the symbol index. */
1271 if (abfd
->xvec
->header_byteorder_big_p
)
1273 r_index
= ((rel
->r_index
[0] << 16)
1274 | (rel
->r_index
[1] << 8)
1279 r_index
= ((rel
->r_index
[2] << 16)
1280 | (rel
->r_index
[1] << 8)
1284 /* Get the hash table entry. */
1285 h
= sym_hashes
[r_index
];
1288 /* This should not normally happen, but it will in any case
1289 be caught in the relocation phase. */
1293 /* At this point common symbols have already been allocated, so
1294 we don't have to worry about them. We need to consider that
1295 we may have already seen this symbol and marked it undefined;
1296 if the symbols is really undefined, then SUNOS_DEF_DYNAMIC
1298 if (h
->root
.root
.type
!= bfd_link_hash_defined
1299 && h
->root
.root
.type
!= bfd_link_hash_undefined
)
1302 if ((h
->flags
& SUNOS_DEF_DYNAMIC
) == 0
1303 || (h
->flags
& SUNOS_DEF_REGULAR
) != 0)
1306 BFD_ASSERT ((h
->flags
& SUNOS_REF_REGULAR
) != 0);
1307 BFD_ASSERT (h
->root
.root
.type
== bfd_link_hash_defined
1308 ? (h
->root
.root
.u
.def
.section
->owner
->flags
& DYNAMIC
) != 0
1309 : (h
->root
.root
.u
.undef
.abfd
->flags
& DYNAMIC
) != 0);
1311 /* This reloc is against a symbol defined only by a dynamic
1314 if (h
->root
.root
.type
== bfd_link_hash_undefined
)
1316 /* Presumably this symbol was marked as being undefined by
1317 an earlier reloc. */
1318 srel
->_raw_size
+= RELOC_STD_SIZE
;
1320 else if ((h
->root
.root
.u
.def
.section
->flags
& SEC_CODE
) == 0)
1324 /* This reloc is not in the .text section. It must be
1325 copied into the dynamic relocs. We mark the symbol as
1327 srel
->_raw_size
+= RELOC_STD_SIZE
;
1328 sub
= h
->root
.root
.u
.def
.section
->owner
;
1329 h
->root
.root
.type
= bfd_link_hash_undefined
;
1330 h
->root
.root
.u
.undef
.abfd
= sub
;
1334 /* This symbol is in the .text section. We must give it an
1335 entry in the procedure linkage table, if we have not
1336 already done so. We change the definition of the symbol
1337 to the .plt section; this will cause relocs against it to
1338 be handled correctly. */
1339 if (h
->root
.root
.u
.def
.section
!= splt
)
1341 if (splt
->_raw_size
== 0)
1342 splt
->_raw_size
= M68K_PLT_ENTRY_SIZE
;
1343 h
->root
.root
.u
.def
.section
= splt
;
1344 h
->root
.root
.u
.def
.value
= splt
->_raw_size
;
1345 splt
->_raw_size
+= M68K_PLT_ENTRY_SIZE
;
1347 /* We will also need a dynamic reloc entry. */
1348 srel
->_raw_size
+= RELOC_STD_SIZE
;
1356 /* Scan the relocs for an input section using extended relocs. We
1357 need to figure out what to do for each reloc against a dynamic
1358 symbol. If the reloc is a WDISP30, and the symbol is in the .text
1359 section, an entry is made in the procedure linkage table.
1360 Otherwise, we must preserve the reloc as a dynamic reloc. FIXME:
1361 We should also handle the PIC relocs here by building global offset
1365 sunos_scan_ext_relocs (info
, abfd
, sec
, relocs
, rel_size
)
1366 struct bfd_link_info
*info
;
1369 const struct reloc_ext_external
*relocs
;
1370 bfd_size_type rel_size
;
1375 struct sunos_link_hash_entry
**sym_hashes
;
1376 const struct reloc_ext_external
*rel
, *relend
;
1378 /* We only know how to handle SPARC plt entries. */
1379 if (bfd_get_arch (abfd
) != bfd_arch_sparc
)
1381 bfd_set_error (bfd_error_invalid_target
);
1385 dynobj
= sunos_hash_table (info
)->dynobj
;
1386 splt
= bfd_get_section_by_name (dynobj
, ".plt");
1387 srel
= bfd_get_section_by_name (dynobj
, ".dynrel");
1388 BFD_ASSERT (splt
!= NULL
&& srel
!= NULL
);
1389 sym_hashes
= (struct sunos_link_hash_entry
**) obj_aout_sym_hashes (abfd
);
1391 relend
= relocs
+ rel_size
/ RELOC_EXT_SIZE
;
1392 for (rel
= relocs
; rel
< relend
; rel
++)
1396 struct sunos_link_hash_entry
*h
;
1398 /* We only want relocs against external symbols. */
1399 if (abfd
->xvec
->header_byteorder_big_p
)
1401 if ((rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_BIG
) == 0)
1406 if ((rel
->r_type
[0] & RELOC_EXT_BITS_EXTERN_LITTLE
) == 0)
1410 /* Get the symbol index and reloc type. */
1411 if (abfd
->xvec
->header_byteorder_big_p
)
1413 r_index
= ((rel
->r_index
[0] << 16)
1414 | (rel
->r_index
[1] << 8)
1416 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_BIG
)
1417 >> RELOC_EXT_BITS_TYPE_SH_BIG
);
1421 r_index
= ((rel
->r_index
[2] << 16)
1422 | (rel
->r_index
[1] << 8)
1424 r_type
= ((rel
->r_type
[0] & RELOC_EXT_BITS_TYPE_LITTLE
)
1425 >> RELOC_EXT_BITS_TYPE_SH_LITTLE
);
1428 /* Get the hash table entry. */
1429 h
= sym_hashes
[r_index
];
1432 /* This should not normally happen, but it will in any case
1433 be caught in the relocation phase. */
1437 /* At this point common symbols have already been allocated, so
1438 we don't have to worry about them. We need to consider that
1439 we may have already seen this symbol and marked it undefined;
1440 if the symbols is really undefined, then SUNOS_DEF_DYNAMIC
1442 if (h
->root
.root
.type
!= bfd_link_hash_defined
1443 && h
->root
.root
.type
!= bfd_link_hash_undefined
)
1446 if ((h
->flags
& SUNOS_DEF_DYNAMIC
) == 0
1447 || (h
->flags
& SUNOS_DEF_REGULAR
) != 0)
1450 BFD_ASSERT ((h
->flags
& SUNOS_REF_REGULAR
) != 0);
1451 BFD_ASSERT (h
->root
.root
.type
== bfd_link_hash_defined
1452 ? (h
->root
.root
.u
.def
.section
->owner
->flags
& DYNAMIC
) != 0
1453 : (h
->root
.root
.u
.undef
.abfd
->flags
& DYNAMIC
) != 0);
1455 /* This reloc is against a symbol defined only by a dynamic
1458 if (h
->root
.root
.type
== bfd_link_hash_undefined
)
1460 /* Presumably this symbol was marked as being undefined by
1461 an earlier reloc. */
1462 srel
->_raw_size
+= RELOC_EXT_SIZE
;
1464 else if ((h
->root
.root
.u
.def
.section
->flags
& SEC_CODE
) == 0)
1468 /* This reloc is not in the .text section. It must be
1469 copied into the dynamic relocs. We mark the symbol as
1471 srel
->_raw_size
+= RELOC_EXT_SIZE
;
1472 sub
= h
->root
.root
.u
.def
.section
->owner
;
1473 h
->root
.root
.type
= bfd_link_hash_undefined
;
1474 h
->root
.root
.u
.undef
.abfd
= sub
;
1478 /* This symbol is in the .text section. We must give it an
1479 entry in the procedure linkage table, if we have not
1480 already done so. We change the definition of the symbol
1481 to the .plt section; this will cause relocs against it to
1482 be handled correctly. */
1483 if (h
->root
.root
.u
.def
.section
!= splt
)
1485 if (splt
->_raw_size
== 0)
1486 splt
->_raw_size
= SPARC_PLT_ENTRY_SIZE
;
1487 h
->root
.root
.u
.def
.section
= splt
;
1488 h
->root
.root
.u
.def
.value
= splt
->_raw_size
;
1489 splt
->_raw_size
+= SPARC_PLT_ENTRY_SIZE
;
1491 /* We will also need a dynamic reloc entry. */
1492 srel
->_raw_size
+= RELOC_EXT_SIZE
;
1500 /* Build the hash table of dynamic symbols, and to mark as written all
1501 symbols from dynamic objects which we do not plan to write out. */
1504 sunos_scan_dynamic_symbol (h
, data
)
1505 struct sunos_link_hash_entry
*h
;
1508 struct bfd_link_info
*info
= (struct bfd_link_info
*) data
;
1510 /* Set the written flag for symbols we do not want to write out as
1511 part of the regular symbol table. This is all symbols which are
1512 not defined in a regular object file. For some reason symbols
1513 which are referenced by a regular object and defined by a dynamic
1514 object do not seem to show up in the regular symbol table. */
1515 if ((h
->flags
& SUNOS_DEF_REGULAR
) == 0)
1516 h
->root
.root
.written
= true;
1518 /* If this symbol is defined by a dynamic object and referenced by a
1519 regular object, see whether we gave it a reasonable value while
1520 scanning the relocs. */
1522 if ((h
->flags
& SUNOS_DEF_REGULAR
) == 0
1523 && (h
->flags
& SUNOS_DEF_DYNAMIC
) != 0
1524 && (h
->flags
& SUNOS_REF_REGULAR
) != 0)
1526 if (h
->root
.root
.type
== bfd_link_hash_defined
1527 && ((h
->root
.root
.u
.def
.section
->owner
->flags
& DYNAMIC
) != 0)
1528 && h
->root
.root
.u
.def
.section
->output_section
== NULL
)
1532 /* This symbol is currently defined in a dynamic section
1533 which is not being put into the output file. This
1534 implies that there is no reloc against the symbol. I'm
1535 not sure why this case would ever occur. In any case, we
1536 change the symbol to be undefined. */
1537 sub
= h
->root
.root
.u
.def
.section
->owner
;
1538 h
->root
.root
.type
= bfd_link_hash_undefined
;
1539 h
->root
.root
.u
.undef
.abfd
= sub
;
1543 /* If this symbol is defined or referenced by a regular file, add it
1544 to the dynamic symbols. */
1545 if ((h
->flags
& (SUNOS_DEF_REGULAR
| SUNOS_REF_REGULAR
)) != 0)
1550 unsigned char *name
;
1554 BFD_ASSERT (h
->dynindx
== -2);
1556 h
->dynindx
= sunos_hash_table (info
)->dynsymcount
;
1557 ++sunos_hash_table (info
)->dynsymcount
;
1559 len
= strlen (h
->root
.root
.root
.string
);
1561 /* We don't bother to construct a BFD hash table for the strings
1562 which are the names of the dynamic symbols. Using a hash
1563 table for the regular symbols is beneficial, because the
1564 regular symbols includes the debugging symbols, which have
1565 long names and are often duplicated in several object files.
1566 There are no debugging symbols in the dynamic symbols. */
1567 s
= bfd_get_section_by_name (sunos_hash_table (info
)->dynobj
,
1569 BFD_ASSERT (s
!= NULL
);
1570 if (s
->contents
== NULL
)
1571 contents
= (bfd_byte
*) malloc (len
+ 1);
1573 contents
= (bfd_byte
*) realloc (s
->contents
, s
->_raw_size
+ len
+ 1);
1574 if (contents
== NULL
)
1576 bfd_set_error (bfd_error_no_memory
);
1579 s
->contents
= contents
;
1581 h
->dynstr_index
= s
->_raw_size
;
1582 strcpy (contents
+ s
->_raw_size
, h
->root
.root
.root
.string
);
1583 s
->_raw_size
+= len
+ 1;
1585 /* Add it to the dynamic hash table. */
1586 name
= (unsigned char *) h
->root
.root
.root
.string
;
1588 while (*name
!= '\0')
1589 hash
= (hash
<< 1) + *name
++;
1591 hash
%= sunos_hash_table (info
)->bucketcount
;
1593 dynobj
= sunos_hash_table (info
)->dynobj
;
1594 s
= bfd_get_section_by_name (dynobj
, ".hash");
1595 BFD_ASSERT (s
!= NULL
);
1597 if (GET_SWORD (dynobj
, s
->contents
+ hash
* HASH_ENTRY_SIZE
) == -1)
1598 PUT_WORD (dynobj
, h
->dynindx
, s
->contents
+ hash
* HASH_ENTRY_SIZE
);
1603 next
= GET_WORD (dynobj
,
1605 + hash
* HASH_ENTRY_SIZE
1607 PUT_WORD (dynobj
, s
->_raw_size
/ HASH_ENTRY_SIZE
,
1608 s
->contents
+ hash
* HASH_ENTRY_SIZE
+ BYTES_IN_WORD
);
1609 PUT_WORD (dynobj
, h
->dynindx
, s
->contents
+ s
->_raw_size
);
1610 PUT_WORD (dynobj
, next
, s
->contents
+ s
->_raw_size
+ BYTES_IN_WORD
);
1611 s
->_raw_size
+= HASH_ENTRY_SIZE
;
1618 /* Link a dynamic object. We actually don't have anything to do at
1619 this point. This entry point exists to prevent the regular linker
1620 code from doing anything with the object. */
1624 sunos_link_dynamic_object (info
, abfd
)
1625 struct bfd_link_info
*info
;
1632 /* Write out a dynamic symbol. This is called by the final traversal
1633 over the symbol table. */
1636 sunos_write_dynamic_symbol (output_bfd
, info
, harg
)
1638 struct bfd_link_info
*info
;
1639 struct aout_link_hash_entry
*harg
;
1641 struct sunos_link_hash_entry
*h
= (struct sunos_link_hash_entry
*) harg
;
1646 struct external_nlist
*outsym
;
1652 switch (h
->root
.root
.type
)
1655 case bfd_link_hash_new
:
1657 /* Avoid variable not initialized warnings. */
1659 case bfd_link_hash_undefined
:
1660 type
= N_UNDF
| N_EXT
;
1663 case bfd_link_hash_defined
:
1666 asection
*output_section
;
1668 sec
= h
->root
.root
.u
.def
.section
;
1669 output_section
= sec
->output_section
;
1670 BFD_ASSERT (output_section
== &bfd_abs_section
1671 || output_section
->owner
== output_bfd
);
1672 if (strcmp (sec
->name
, ".plt") == 0)
1675 type
= N_UNDF
| N_EXT
;
1680 if (output_section
== obj_textsec (output_bfd
))
1681 type
= N_TEXT
| N_EXT
;
1682 else if (output_section
== obj_datasec (output_bfd
))
1683 type
= N_DATA
| N_EXT
;
1684 else if (output_section
== obj_bsssec (output_bfd
))
1685 type
= N_BSS
| N_EXT
;
1687 type
= N_ABS
| N_EXT
;
1688 val
= (h
->root
.root
.u
.def
.value
1689 + output_section
->vma
1690 + sec
->output_offset
);
1694 case bfd_link_hash_common
:
1695 type
= N_UNDF
| N_EXT
;
1696 val
= h
->root
.root
.u
.c
.size
;
1698 case bfd_link_hash_indirect
:
1699 case bfd_link_hash_warning
:
1700 /* FIXME: Ignore these for now. The circumstances under which
1701 they should be written out are not clear to me. */
1705 s
= bfd_get_section_by_name (sunos_hash_table (info
)->dynobj
, ".dynsym");
1706 BFD_ASSERT (s
!= NULL
);
1707 outsym
= ((struct external_nlist
*)
1708 (s
->contents
+ h
->dynindx
* EXTERNAL_NLIST_SIZE
));
1710 bfd_h_put_8 (output_bfd
, type
, outsym
->e_type
);
1711 bfd_h_put_8 (output_bfd
, 0, outsym
->e_other
);
1713 /* FIXME: The native linker doesn't use 0 for desc. It seems to use
1714 one less than the desc value in the shared library, although that
1716 bfd_h_put_16 (output_bfd
, 0, outsym
->e_desc
);
1718 PUT_WORD (output_bfd
, h
->dynstr_index
, outsym
->e_strx
);
1719 PUT_WORD (output_bfd
, val
, outsym
->e_value
);
1721 /* If this symbol is in the procedure linkage table, fill in the
1729 p
= h
->root
.root
.u
.def
.section
->contents
+ h
->root
.root
.u
.def
.value
;
1731 s
= bfd_get_section_by_name (sunos_hash_table (info
)->dynobj
, ".dynrel");
1732 BFD_ASSERT (s
!= NULL
);
1734 r_address
= (h
->root
.root
.u
.def
.section
->output_section
->vma
1735 + h
->root
.root
.u
.def
.section
->output_offset
1736 + h
->root
.root
.u
.def
.value
);
1738 switch (bfd_get_arch (output_bfd
))
1740 case bfd_arch_sparc
:
1741 bfd_put_32 (output_bfd
, SPARC_PLT_ENTRY_WORD0
, p
);
1742 bfd_put_32 (output_bfd
,
1743 (SPARC_PLT_ENTRY_WORD1
1744 + (((- (h
->root
.root
.u
.def
.value
+ 4) >> 2)
1747 bfd_put_32 (output_bfd
, SPARC_PLT_ENTRY_WORD2
+ s
->reloc_count
,
1752 bfd_put_16 (output_bfd
, M68K_PLT_ENTRY_WORD0
, p
);
1753 bfd_put_32 (output_bfd
, (- (h
->root
.root
.u
.def
.value
+ 2)), p
+ 2);
1754 bfd_put_16 (output_bfd
, s
->reloc_count
, p
+ 6);
1762 /* We also need to add a jump table reloc. */
1763 p
= s
->contents
+ s
->reloc_count
* obj_reloc_entry_size (output_bfd
);
1764 if (obj_reloc_entry_size (output_bfd
) == RELOC_STD_SIZE
)
1766 struct reloc_std_external
*srel
;
1768 srel
= (struct reloc_std_external
*) p
;
1769 PUT_WORD (output_bfd
, r_address
, srel
->r_address
);
1770 if (output_bfd
->xvec
->header_byteorder_big_p
)
1772 srel
->r_index
[0] = h
->dynindx
>> 16;
1773 srel
->r_index
[1] = h
->dynindx
>> 8;
1774 srel
->r_index
[2] = h
->dynindx
;
1775 srel
->r_type
[0] = (RELOC_STD_BITS_EXTERN_BIG
1776 | RELOC_STD_BITS_JMPTABLE_BIG
);
1780 srel
->r_index
[2] = h
->dynindx
>> 16;
1781 srel
->r_index
[1] = h
->dynindx
>> 8;
1782 srel
->r_index
[0] = h
->dynindx
;
1783 srel
->r_type
[0] = (RELOC_STD_BITS_EXTERN_LITTLE
1784 | RELOC_STD_BITS_JMPTABLE_LITTLE
);
1789 struct reloc_ext_external
*erel
;
1791 erel
= (struct reloc_ext_external
*) p
;
1792 PUT_WORD (output_bfd
, r_address
, erel
->r_address
);
1793 if (output_bfd
->xvec
->header_byteorder_big_p
)
1795 erel
->r_index
[0] = h
->dynindx
>> 16;
1796 erel
->r_index
[1] = h
->dynindx
>> 8;
1797 erel
->r_index
[2] = h
->dynindx
;
1798 erel
->r_type
[0] = (RELOC_EXT_BITS_EXTERN_BIG
1799 | (22 << RELOC_EXT_BITS_TYPE_SH_BIG
));
1803 erel
->r_index
[2] = h
->dynindx
>> 16;
1804 erel
->r_index
[1] = h
->dynindx
>> 8;
1805 erel
->r_index
[0] = h
->dynindx
;
1806 erel
->r_type
[0] = (RELOC_EXT_BITS_EXTERN_LITTLE
1807 | (22 << RELOC_EXT_BITS_TYPE_SH_LITTLE
));
1809 PUT_WORD (output_bfd
, (bfd_vma
) 0, erel
->r_addend
);
1818 /* This is called for each reloc against an external symbol. If this
1819 is a reloc which are are going to copy as a dynamic reloc, then
1820 copy it over, and tell the caller to not bother processing this
1825 sunos_check_dynamic_reloc (info
, input_bfd
, input_section
, harg
, reloc
, skip
)
1826 struct bfd_link_info
*info
;
1828 asection
*input_section
;
1829 struct aout_link_hash_entry
*harg
;
1833 struct sunos_link_hash_entry
*h
= (struct sunos_link_hash_entry
*) harg
;
1840 dynobj
= sunos_hash_table (info
)->dynobj
;
1844 || h
->root
.root
.type
!= bfd_link_hash_undefined
1845 || (h
->flags
& SUNOS_DEF_REGULAR
) != 0
1846 || (h
->flags
& SUNOS_DEF_DYNAMIC
) == 0
1847 || (h
->root
.root
.u
.undef
.abfd
->flags
& DYNAMIC
) == 0)
1850 /* It looks this is a reloc we are supposed to copy. */
1852 srel
= bfd_get_section_by_name (dynobj
, ".dynrel");
1853 BFD_ASSERT (srel
!= NULL
);
1855 p
= srel
->contents
+ srel
->reloc_count
* obj_reloc_entry_size (dynobj
);
1857 /* Copy the reloc over. */
1858 memcpy (p
, reloc
, obj_reloc_entry_size (dynobj
));
1860 /* Adjust the address and symbol index. */
1861 if (obj_reloc_entry_size (dynobj
) == RELOC_STD_SIZE
)
1863 struct reloc_std_external
*srel
;
1865 srel
= (struct reloc_std_external
*) p
;
1867 (GET_WORD (dynobj
, srel
->r_address
)
1868 + input_section
->output_section
->vma
1869 + input_section
->output_offset
),
1871 if (dynobj
->xvec
->header_byteorder_big_p
)
1873 srel
->r_index
[0] = h
->dynindx
>> 16;
1874 srel
->r_index
[1] = h
->dynindx
>> 8;
1875 srel
->r_index
[2] = h
->dynindx
;
1879 srel
->r_index
[2] = h
->dynindx
>> 16;
1880 srel
->r_index
[1] = h
->dynindx
>> 8;
1881 srel
->r_index
[0] = h
->dynindx
;
1886 struct reloc_ext_external
*erel
;
1888 erel
= (struct reloc_ext_external
*) p
;
1890 (GET_WORD (dynobj
, erel
->r_address
)
1891 + input_section
->output_section
->vma
1892 + input_section
->output_offset
),
1894 if (dynobj
->xvec
->header_byteorder_big_p
)
1896 erel
->r_index
[0] = h
->dynindx
>> 16;
1897 erel
->r_index
[1] = h
->dynindx
>> 8;
1898 erel
->r_index
[2] = h
->dynindx
;
1902 erel
->r_index
[2] = h
->dynindx
>> 16;
1903 erel
->r_index
[1] = h
->dynindx
>> 8;
1904 erel
->r_index
[0] = h
->dynindx
;
1908 ++srel
->reloc_count
;
1915 /* Finish up the dynamic linking information. */
1918 sunos_finish_dynamic_link (abfd
, info
)
1920 struct bfd_link_info
*info
;
1926 struct external_sun4_dynamic esd
;
1927 struct external_sun4_dynamic_link esdl
;
1929 dynobj
= sunos_hash_table (info
)->dynobj
;
1933 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
1934 BFD_ASSERT (sdyn
!= NULL
);
1936 /* Finish up the .need section. The linker emulation code filled it
1937 in, but with offsets from the start of the section instead of
1938 real addresses. Now that we know the section location, we can
1939 fill in the final values. */
1940 s
= bfd_get_section_by_name (dynobj
, ".need");
1941 BFD_ASSERT (s
!= NULL
);
1942 if (s
->_raw_size
!= 0)
1947 filepos
= s
->output_section
->filepos
+ s
->output_offset
;
1953 PUT_WORD (dynobj
, GET_WORD (dynobj
, p
) + filepos
, p
);
1954 val
= GET_WORD (dynobj
, p
+ 12);
1957 PUT_WORD (dynobj
, val
+ filepos
, p
+ 12);
1962 /* The first entry in the .got section is the address of the dynamic
1964 s
= bfd_get_section_by_name (dynobj
, ".got");
1965 BFD_ASSERT (s
!= NULL
);
1966 PUT_WORD (dynobj
, sdyn
->output_section
->vma
+ sdyn
->output_offset
,
1969 for (o
= dynobj
->sections
; o
!= NULL
; o
= o
->next
)
1971 if ((o
->flags
& SEC_HAS_CONTENTS
) != 0
1972 && o
->contents
!= NULL
)
1974 BFD_ASSERT (o
->output_section
!= NULL
1975 && o
->output_section
->owner
== abfd
);
1976 if (! bfd_set_section_contents (abfd
, o
->output_section
,
1977 o
->contents
, o
->output_offset
,
1983 /* Finish up the dynamic link information. */
1984 PUT_WORD (dynobj
, (bfd_vma
) 3, esd
.ld_version
);
1986 sdyn
->output_section
->vma
+ sdyn
->output_offset
+ sizeof esd
,
1989 (sdyn
->output_section
->vma
1990 + sdyn
->output_offset
1992 + EXTERNAL_SUN4_DYNAMIC_DEBUGGER_SIZE
),
1995 if (! bfd_set_section_contents (abfd
, sdyn
->output_section
, &esd
,
1996 sdyn
->output_offset
, sizeof esd
))
2000 PUT_WORD (dynobj
, (bfd_vma
) 0, esdl
.ld_loaded
);
2002 s
= bfd_get_section_by_name (dynobj
, ".need");
2003 BFD_ASSERT (s
!= NULL
);
2004 if (s
->_raw_size
== 0)
2005 PUT_WORD (dynobj
, (bfd_vma
) 0, esdl
.ld_need
);
2007 PUT_WORD (dynobj
, s
->output_section
->filepos
+ s
->output_offset
,
2010 s
= bfd_get_section_by_name (dynobj
, ".rules");
2011 BFD_ASSERT (s
!= NULL
);
2012 if (s
->_raw_size
== 0)
2013 PUT_WORD (dynobj
, (bfd_vma
) 0, esdl
.ld_rules
);
2015 PUT_WORD (dynobj
, s
->output_section
->filepos
+ s
->output_offset
,
2018 s
= bfd_get_section_by_name (dynobj
, ".got");
2019 BFD_ASSERT (s
!= NULL
);
2020 PUT_WORD (dynobj
, s
->output_section
->vma
+ s
->output_offset
, esdl
.ld_got
);
2022 s
= bfd_get_section_by_name (dynobj
, ".plt");
2023 BFD_ASSERT (s
!= NULL
);
2024 PUT_WORD (dynobj
, s
->output_section
->vma
+ s
->output_offset
, esdl
.ld_plt
);
2025 PUT_WORD (dynobj
, s
->_raw_size
, esdl
.ld_plt_sz
);
2027 s
= bfd_get_section_by_name (dynobj
, ".dynrel");
2028 BFD_ASSERT (s
!= NULL
);
2029 BFD_ASSERT (s
->reloc_count
* obj_reloc_entry_size (dynobj
) == s
->_raw_size
);
2030 PUT_WORD (dynobj
, s
->output_section
->filepos
+ s
->output_offset
,
2033 s
= bfd_get_section_by_name (dynobj
, ".hash");
2034 BFD_ASSERT (s
!= NULL
);
2035 PUT_WORD (dynobj
, s
->output_section
->filepos
+ s
->output_offset
,
2038 s
= bfd_get_section_by_name (dynobj
, ".dynsym");
2039 BFD_ASSERT (s
!= NULL
);
2040 PUT_WORD (dynobj
, s
->output_section
->filepos
+ s
->output_offset
,
2043 PUT_WORD (dynobj
, (bfd_vma
) 0, esdl
.ld_stab_hash
);
2045 PUT_WORD (dynobj
, (bfd_vma
) sunos_hash_table (info
)->bucketcount
,
2048 s
= bfd_get_section_by_name (dynobj
, ".dynstr");
2049 BFD_ASSERT (s
!= NULL
);
2050 PUT_WORD (dynobj
, s
->output_section
->filepos
+ s
->output_offset
,
2052 PUT_WORD (dynobj
, s
->_raw_size
, esdl
.ld_symb_size
);
2054 /* The size of the text area is the size of the .text section
2055 rounded up to a page boundary. FIXME: Should the page size be
2056 conditional on something? */
2058 BFD_ALIGN (obj_textsec (abfd
)->_raw_size
, 0x2000),
2061 if (! bfd_set_section_contents (abfd
, sdyn
->output_section
, &esdl
,
2062 (sdyn
->output_offset
2064 + EXTERNAL_SUN4_DYNAMIC_DEBUGGER_SIZE
),
2068 abfd
->flags
|= DYNAMIC
;