1 /* POWER/PowerPC XCOFF linker support.
2 Copyright 1995 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor <ian@cygnus.com>, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 #include "coff/internal.h"
28 /* This file holds the XCOFF linker code. */
30 #define STRING_SIZE_SIZE (4)
32 /* In order to support linking different object file formats into an
33 XCOFF format, we need to be able to determine whether a particular
34 bfd_target is an XCOFF vector. FIXME: We need to rethink this
36 #define XCOFF_XVECP(xv) \
37 (strcmp ((xv)->name, "aixcoff-rs6000") == 0 \
38 || strcmp ((xv)->name, "xcoff-powermac") == 0)
40 /* Get the XCOFF hash table entries for a BFD. */
41 #define obj_xcoff_sym_hashes(bfd) \
42 ((struct xcoff_link_hash_entry **) obj_coff_sym_hashes (bfd))
44 /* XCOFF relocation types. These probably belong in a header file
45 somewhere. The relocations are described in the function
46 _bfd_ppc_xcoff_relocate_section in this file. */
62 #define R_RRTBI (0x14)
63 #define R_RRTBA (0x15)
71 /* The first word of global linkage code. This must be modified by
72 filling in the correct TOC offset. */
74 #define XCOFF_GLINK_FIRST (0x81820000) /* lwz r12,0(r2) */
76 /* The remaining words of global linkage code. */
78 static unsigned long xcoff_glink_code
[] =
80 0x90410014, /* stw r2,20(r1) */
81 0x800c0000, /* lwz r0,0(r12) */
82 0x804c0004, /* lwz r2,4(r12) */
83 0x7c0903a6, /* mtctr r0 */
84 0x4e800420, /* bctr */
85 0x0, /* start of traceback table */
86 0x000c8000, /* traceback table */
87 0x0 /* traceback table */
90 #define XCOFF_GLINK_SIZE \
91 (((sizeof xcoff_glink_code / sizeof xcoff_glink_code[0]) * 4) + 4)
93 /* We reuse the SEC_ROM flag as a mark flag for garbage collection.
94 This flag will only be used on input sections. */
96 #define SEC_MARK (SEC_ROM)
98 /* The ldhdr structure. This appears at the start of the .loader
101 struct internal_ldhdr
103 /* The version number: currently always 1. */
104 unsigned long l_version
;
105 /* The number of symbol table entries. */
106 bfd_size_type l_nsyms
;
107 /* The number of relocation table entries. */
108 bfd_size_type l_nreloc
;
109 /* The length of the import file string table. */
110 bfd_size_type l_istlen
;
111 /* The number of import files. */
112 bfd_size_type l_nimpid
;
113 /* The offset from the start of the .loader section to the first
114 entry in the import file table. */
115 bfd_size_type l_impoff
;
116 /* The length of the string table. */
117 bfd_size_type l_stlen
;
118 /* The offset from the start of the .loader section to the first
119 entry in the string table. */
120 bfd_size_type l_stoff
;
123 struct external_ldhdr
125 bfd_byte l_version
[4];
127 bfd_byte l_nreloc
[4];
128 bfd_byte l_istlen
[4];
129 bfd_byte l_nimpid
[4];
130 bfd_byte l_impoff
[4];
135 #define LDHDRSZ (8 * 4)
137 /* The ldsym structure. This is used to represent a symbol in the
140 struct internal_ldsym
144 /* The symbol name if <= SYMNMLEN characters. */
145 char _l_name
[SYMNMLEN
];
148 /* Zero if the symbol name is more than SYMNMLEN characters. */
150 /* The offset in the string table if the symbol name is more
151 than SYMNMLEN characters. */
155 /* The symbol value. */
157 /* The symbol section number. */
159 /* The symbol type and flags. */
161 /* The symbol storage class. */
163 /* The import file ID. */
164 bfd_size_type l_ifile
;
165 /* Offset to the parameter type check string. */
166 bfd_size_type l_parm
;
169 struct external_ldsym
173 bfd_byte _l_name
[SYMNMLEN
];
176 bfd_byte _l_zeroes
[4];
177 bfd_byte _l_offset
[4];
182 bfd_byte l_smtype
[1];
183 bfd_byte l_smclas
[1];
188 #define LDSYMSZ (8 + 3 * 4 + 2 + 2)
190 /* These flags are for the l_smtype field (the lower three bits are an
193 /* Imported symbol. */
194 #define L_IMPORT (0x40)
196 #define L_ENTRY (0x20)
197 /* Exported symbol. */
198 #define L_EXPORT (0x10)
200 /* The ldrel structure. This is used to represent a reloc in the
203 struct internal_ldrel
205 /* The reloc address. */
207 /* The symbol table index in the .loader section symbol table. */
208 bfd_size_type l_symndx
;
209 /* The relocation type and size. */
211 /* The section number this relocation applies to. */
215 struct external_ldrel
218 bfd_byte l_symndx
[4];
220 bfd_byte l_rsecnm
[2];
223 #define LDRELSZ (2 * 4 + 2 * 2)
225 /* The list of import files. */
227 struct xcoff_import_file
229 /* The next entry in the list. */
230 struct xcoff_import_file
*next
;
235 /* The member name. */
239 /* An entry in the XCOFF linker hash table. */
241 struct xcoff_link_hash_entry
243 struct bfd_link_hash_entry root
;
245 /* Symbol index in output file. Set to -1 initially. Set to -2 if
246 there is a reloc against this symbol. */
249 /* If we have created a TOC entry for this symbol, this is the .tc
250 section which holds it. */
251 asection
*toc_section
;
255 /* If we have created a TOC entry (the XCOFF_SET_TOC flag is
256 set), this is the offset in toc_section. */
258 /* If the TOC entry comes from an input file, this is set to the
259 symbo lindex of the C_HIDEXT XMC_TC symbol. */
263 /* If this symbol is a function entry point which is called, this
264 field holds a pointer to the function descriptor. If this symbol
265 is a function descriptor, this field holds a pointer to the
266 function entry point. */
267 struct xcoff_link_hash_entry
*descriptor
;
269 /* The .loader symbol table entry, if there is one. */
270 struct internal_ldsym
*ldsym
;
272 /* The .loader symbol table index. */
275 /* Some linker flags. */
276 unsigned short flags
;
277 /* Symbol is referenced by a regular object. */
278 #define XCOFF_REF_REGULAR (01)
279 /* Symbol is defined by a regular object. */
280 #define XCOFF_DEF_REGULAR (02)
281 /* Symbol is defined by a dynamic object. */
282 #define XCOFF_DEF_DYNAMIC (04)
283 /* Symbol is used in a reloc being copied into the .loader section. */
284 #define XCOFF_LDREL (010)
285 /* Symbol is the entry point. */
286 #define XCOFF_ENTRY (020)
287 /* Symbol is called; this is, it appears in a R_BR reloc. */
288 #define XCOFF_CALLED (040)
289 /* Symbol needs the TOC entry filled in. */
290 #define XCOFF_SET_TOC (0100)
291 /* Symbol is explicitly imported. */
292 #define XCOFF_IMPORT (0200)
293 /* Symbol is explicitly exported. */
294 #define XCOFF_EXPORT (0400)
295 /* Symbol has been processed by xcoff_build_ldsyms. */
296 #define XCOFF_BUILT_LDSYM (01000)
297 /* Symbol is mentioned by a section which was not garbage collected. */
298 #define XCOFF_MARK (02000)
299 /* Symbol size is recorded in size_list list from hash table. */
300 #define XCOFF_HAS_SIZE (04000)
301 /* Symbol is a function descriptor. */
302 #define XCOFF_DESCRIPTOR (010000)
304 /* The storage mapping class. */
305 unsigned char smclas
;
308 /* The XCOFF linker hash table. */
310 struct xcoff_link_hash_table
312 struct bfd_link_hash_table root
;
314 /* The .debug string hash table. We need to compute this while
315 reading the input files, so that we know how large the .debug
316 section will be before we assign section positions. */
317 struct bfd_strtab_hash
*debug_strtab
;
319 /* The .debug section we will use for the final output. */
320 asection
*debug_section
;
322 /* The .loader section we will use for the final output. */
323 asection
*loader_section
;
325 /* A count of non TOC relative relocs which will need to be
326 allocated in the .loader section. */
329 /* The .loader section header. */
330 struct internal_ldhdr ldhdr
;
332 /* The .gl section we use to hold global linkage code. */
333 asection
*linkage_section
;
335 /* The .tc section we use to hold toc entries we build for global
337 asection
*toc_section
;
339 /* The .ds section we use to hold function descriptors which we
340 create for exported symbols. */
341 asection
*descriptor_section
;
343 /* The list of import files. */
344 struct xcoff_import_file
*imports
;
346 /* Required alignment of sections within the output file. */
347 unsigned long file_align
;
349 /* Whether the .text section must be read-only. */
352 /* Whether garbage collection was done. */
355 /* A linked list of symbols for which we have size information. */
356 struct xcoff_link_size_list
358 struct xcoff_link_size_list
*next
;
359 struct xcoff_link_hash_entry
*h
;
363 /* Magic sections: _text, _etext, _data, _edata, _end, end. */
364 asection
*special_sections
[6];
367 /* Information we keep for each section in the output file during the
370 struct xcoff_link_section_info
372 /* The relocs to be output. */
373 struct internal_reloc
*relocs
;
374 /* For each reloc against a global symbol whose index was not known
375 when the reloc was handled, the global hash table entry. */
376 struct xcoff_link_hash_entry
**rel_hashes
;
377 /* If there is a TOC relative reloc against a global symbol, and the
378 index of the TOC symbol is not known when the reloc was handled,
379 an entry is added to this linked list. This is not an array,
380 like rel_hashes, because this case is quite uncommon. */
381 struct xcoff_toc_rel_hash
383 struct xcoff_toc_rel_hash
*next
;
384 struct xcoff_link_hash_entry
*h
;
385 struct internal_reloc
*rel
;
389 /* Information that we pass around while doing the final link step. */
391 struct xcoff_final_link_info
393 /* General link information. */
394 struct bfd_link_info
*info
;
397 /* Hash table for long symbol names. */
398 struct bfd_strtab_hash
*strtab
;
399 /* Array of information kept for each output section, indexed by the
400 target_index field. */
401 struct xcoff_link_section_info
*section_info
;
402 /* Symbol index of last C_FILE symbol (-1 if none). */
403 long last_file_index
;
404 /* Contents of last C_FILE symbol. */
405 struct internal_syment last_file
;
406 /* Symbol index of TOC symbol. */
408 /* Start of .loader symbols. */
409 struct external_ldsym
*ldsym
;
410 /* Next .loader reloc to swap out. */
411 struct external_ldrel
*ldrel
;
412 /* File position of start of line numbers. */
413 file_ptr line_filepos
;
414 /* Buffer large enough to hold swapped symbols of any input file. */
415 struct internal_syment
*internal_syms
;
416 /* Buffer large enough to hold output indices of symbols of any
419 /* Buffer large enough to hold output symbols for any input file. */
421 /* Buffer large enough to hold external line numbers for any input
424 /* Buffer large enough to hold any input section. */
426 /* Buffer large enough to hold external relocs of any input section. */
427 bfd_byte
*external_relocs
;
430 static void xcoff_swap_ldhdr_in
431 PARAMS ((bfd
*, const struct external_ldhdr
*, struct internal_ldhdr
*));
432 static void xcoff_swap_ldhdr_out
433 PARAMS ((bfd
*, const struct internal_ldhdr
*, struct external_ldhdr
*));
434 static void xcoff_swap_ldsym_in
435 PARAMS ((bfd
*, const struct external_ldsym
*, struct internal_ldsym
*));
436 static void xcoff_swap_ldsym_out
437 PARAMS ((bfd
*, const struct internal_ldsym
*, struct external_ldsym
*));
438 static void xcoff_swap_ldrel_out
439 PARAMS ((bfd
*, const struct internal_ldrel
*, struct external_ldrel
*));
440 static struct bfd_hash_entry
*xcoff_link_hash_newfunc
441 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
442 static struct internal_reloc
*xcoff_read_internal_relocs
443 PARAMS ((bfd
*, asection
*, boolean
, bfd_byte
*, boolean
,
444 struct internal_reloc
*));
445 static boolean xcoff_link_add_object_symbols
446 PARAMS ((bfd
*, struct bfd_link_info
*));
447 static boolean xcoff_link_check_archive_element
448 PARAMS ((bfd
*, struct bfd_link_info
*, boolean
*));
449 static boolean xcoff_link_check_ar_symbols
450 PARAMS ((bfd
*, struct bfd_link_info
*, boolean
*));
451 static bfd_size_type xcoff_find_reloc
452 PARAMS ((struct internal_reloc
*, bfd_size_type
, bfd_vma
));
453 static boolean xcoff_link_add_symbols
PARAMS ((bfd
*, struct bfd_link_info
*));
454 static boolean xcoff_link_add_dynamic_symbols
455 PARAMS ((bfd
*, struct bfd_link_info
*));
456 static boolean xcoff_mark
PARAMS ((struct bfd_link_info
*, asection
*));
457 static void xcoff_sweep
PARAMS ((struct bfd_link_info
*));
458 static boolean xcoff_build_ldsyms
459 PARAMS ((struct xcoff_link_hash_entry
*, PTR
));
460 static boolean xcoff_link_input_bfd
461 PARAMS ((struct xcoff_final_link_info
*, bfd
*));
462 static boolean xcoff_write_global_symbol
463 PARAMS ((struct xcoff_link_hash_entry
*, PTR
));
464 static boolean xcoff_reloc_link_order
465 PARAMS ((bfd
*, struct xcoff_final_link_info
*, asection
*,
466 struct bfd_link_order
*));
467 static int xcoff_sort_relocs
PARAMS ((const PTR
, const PTR
));
469 /* Routines to swap information in the XCOFF .loader section. If we
470 ever need to write an XCOFF loader, this stuff will need to be
471 moved to another file shared by the linker (which XCOFF calls the
472 ``binder'') and the loader. */
474 /* Swap in the ldhdr structure. */
477 xcoff_swap_ldhdr_in (abfd
, src
, dst
)
479 const struct external_ldhdr
*src
;
480 struct internal_ldhdr
*dst
;
482 dst
->l_version
= bfd_get_32 (abfd
, src
->l_version
);
483 dst
->l_nsyms
= bfd_get_32 (abfd
, src
->l_nsyms
);
484 dst
->l_nreloc
= bfd_get_32 (abfd
, src
->l_nreloc
);
485 dst
->l_istlen
= bfd_get_32 (abfd
, src
->l_istlen
);
486 dst
->l_nimpid
= bfd_get_32 (abfd
, src
->l_nimpid
);
487 dst
->l_impoff
= bfd_get_32 (abfd
, src
->l_impoff
);
488 dst
->l_stlen
= bfd_get_32 (abfd
, src
->l_stlen
);
489 dst
->l_stoff
= bfd_get_32 (abfd
, src
->l_stoff
);
492 /* Swap out the ldhdr structure. */
495 xcoff_swap_ldhdr_out (abfd
, src
, dst
)
497 const struct internal_ldhdr
*src
;
498 struct external_ldhdr
*dst
;
500 bfd_put_32 (abfd
, src
->l_version
, dst
->l_version
);
501 bfd_put_32 (abfd
, src
->l_nsyms
, dst
->l_nsyms
);
502 bfd_put_32 (abfd
, src
->l_nreloc
, dst
->l_nreloc
);
503 bfd_put_32 (abfd
, src
->l_istlen
, dst
->l_istlen
);
504 bfd_put_32 (abfd
, src
->l_nimpid
, dst
->l_nimpid
);
505 bfd_put_32 (abfd
, src
->l_impoff
, dst
->l_impoff
);
506 bfd_put_32 (abfd
, src
->l_stlen
, dst
->l_stlen
);
507 bfd_put_32 (abfd
, src
->l_stoff
, dst
->l_stoff
);
510 /* Swap in the ldsym structure. */
513 xcoff_swap_ldsym_in (abfd
, src
, dst
)
515 const struct external_ldsym
*src
;
516 struct internal_ldsym
*dst
;
518 if (bfd_get_32 (abfd
, src
->_l
._l_l
._l_zeroes
) != 0)
519 memcpy (dst
->_l
._l_name
, src
->_l
._l_name
, SYMNMLEN
);
522 dst
->_l
._l_l
._l_zeroes
= 0;
523 dst
->_l
._l_l
._l_offset
= bfd_get_32 (abfd
, src
->_l
._l_l
._l_offset
);
525 dst
->l_value
= bfd_get_32 (abfd
, src
->l_value
);
526 dst
->l_scnum
= bfd_get_16 (abfd
, src
->l_scnum
);
527 dst
->l_smtype
= bfd_get_8 (abfd
, src
->l_smtype
);
528 dst
->l_smclas
= bfd_get_8 (abfd
, src
->l_smclas
);
529 dst
->l_ifile
= bfd_get_32 (abfd
, src
->l_ifile
);
530 dst
->l_parm
= bfd_get_32 (abfd
, src
->l_parm
);
533 /* Swap out the ldsym structure. */
536 xcoff_swap_ldsym_out (abfd
, src
, dst
)
538 const struct internal_ldsym
*src
;
539 struct external_ldsym
*dst
;
541 if (src
->_l
._l_l
._l_zeroes
!= 0)
542 memcpy (dst
->_l
._l_name
, src
->_l
._l_name
, SYMNMLEN
);
545 bfd_put_32 (abfd
, 0, dst
->_l
._l_l
._l_zeroes
);
546 bfd_put_32 (abfd
, src
->_l
._l_l
._l_offset
, dst
->_l
._l_l
._l_offset
);
548 bfd_put_32 (abfd
, src
->l_value
, dst
->l_value
);
549 bfd_put_16 (abfd
, src
->l_scnum
, dst
->l_scnum
);
550 bfd_put_8 (abfd
, src
->l_smtype
, dst
->l_smtype
);
551 bfd_put_8 (abfd
, src
->l_smclas
, dst
->l_smclas
);
552 bfd_put_32 (abfd
, src
->l_ifile
, dst
->l_ifile
);
553 bfd_put_32 (abfd
, src
->l_parm
, dst
->l_parm
);
556 /* As it happens, we never need to swap in the ldrel structure. */
558 /* Swap out the ldrel structure. */
561 xcoff_swap_ldrel_out (abfd
, src
, dst
)
563 const struct internal_ldrel
*src
;
564 struct external_ldrel
*dst
;
566 bfd_put_32 (abfd
, src
->l_vaddr
, dst
->l_vaddr
);
567 bfd_put_32 (abfd
, src
->l_symndx
, dst
->l_symndx
);
568 bfd_put_16 (abfd
, src
->l_rtype
, dst
->l_rtype
);
569 bfd_put_16 (abfd
, src
->l_rsecnm
, dst
->l_rsecnm
);
572 /* Routine to create an entry in an XCOFF link hash table. */
574 static struct bfd_hash_entry
*
575 xcoff_link_hash_newfunc (entry
, table
, string
)
576 struct bfd_hash_entry
*entry
;
577 struct bfd_hash_table
*table
;
580 struct xcoff_link_hash_entry
*ret
= (struct xcoff_link_hash_entry
*) entry
;
582 /* Allocate the structure if it has not already been allocated by a
584 if (ret
== (struct xcoff_link_hash_entry
*) NULL
)
585 ret
= ((struct xcoff_link_hash_entry
*)
586 bfd_hash_allocate (table
, sizeof (struct xcoff_link_hash_entry
)));
587 if (ret
== (struct xcoff_link_hash_entry
*) NULL
)
588 return (struct bfd_hash_entry
*) ret
;
590 /* Call the allocation method of the superclass. */
591 ret
= ((struct xcoff_link_hash_entry
*)
592 _bfd_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
596 /* Set local fields. */
598 ret
->toc_section
= NULL
;
599 ret
->u
.toc_indx
= -1;
600 ret
->descriptor
= NULL
;
604 ret
->smclas
= XMC_UA
;
607 return (struct bfd_hash_entry
*) ret
;
610 /* Create a XCOFF link hash table. */
612 struct bfd_link_hash_table
*
613 _bfd_xcoff_bfd_link_hash_table_create (abfd
)
616 struct xcoff_link_hash_table
*ret
;
618 ret
= ((struct xcoff_link_hash_table
*)
619 bfd_alloc (abfd
, sizeof (struct xcoff_link_hash_table
)));
620 if (ret
== (struct xcoff_link_hash_table
*) NULL
)
621 return (struct bfd_link_hash_table
*) NULL
;
622 if (! _bfd_link_hash_table_init (&ret
->root
, abfd
, xcoff_link_hash_newfunc
))
624 bfd_release (abfd
, ret
);
625 return (struct bfd_link_hash_table
*) NULL
;
628 ret
->debug_strtab
= _bfd_xcoff_stringtab_init ();
629 ret
->debug_section
= NULL
;
630 ret
->loader_section
= NULL
;
631 ret
->ldrel_count
= 0;
632 memset (&ret
->ldhdr
, 0, sizeof (struct internal_ldhdr
));
633 ret
->linkage_section
= NULL
;
634 ret
->toc_section
= NULL
;
635 ret
->descriptor_section
= NULL
;
640 memset (ret
->special_sections
, 0, sizeof ret
->special_sections
);
642 /* The linker will always generate a full a.out header. We need to
643 record that fact now, before the sizeof_headers routine could be
645 xcoff_data (abfd
)->full_aouthdr
= true;
650 /* Look up an entry in an XCOFF link hash table. */
652 #define xcoff_link_hash_lookup(table, string, create, copy, follow) \
653 ((struct xcoff_link_hash_entry *) \
654 bfd_link_hash_lookup (&(table)->root, (string), (create), (copy),\
657 /* Traverse an XCOFF link hash table. */
659 #define xcoff_link_hash_traverse(table, func, info) \
660 (bfd_link_hash_traverse \
662 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
665 /* Get the XCOFF link hash table from the info structure. This is
668 #define xcoff_hash_table(p) ((struct xcoff_link_hash_table *) ((p)->hash))
670 /* Read internal relocs for an XCOFF csect. This is a wrapper around
671 _bfd_coff_read_internal_relocs which tries to take advantage of any
672 relocs which may have been cached for the enclosing section. */
674 static struct internal_reloc
*
675 xcoff_read_internal_relocs (abfd
, sec
, cache
, external_relocs
,
676 require_internal
, internal_relocs
)
680 bfd_byte
*external_relocs
;
681 boolean require_internal
;
682 struct internal_reloc
*internal_relocs
;
684 if (coff_section_data (abfd
, sec
) != NULL
685 && coff_section_data (abfd
, sec
)->relocs
== NULL
686 && xcoff_section_data (abfd
, sec
) != NULL
)
690 enclosing
= xcoff_section_data (abfd
, sec
)->enclosing
;
692 if (enclosing
!= NULL
693 && (coff_section_data (abfd
, enclosing
) == NULL
694 || coff_section_data (abfd
, enclosing
)->relocs
== NULL
)
696 && enclosing
->reloc_count
> 0)
698 if (_bfd_coff_read_internal_relocs (abfd
, enclosing
, true,
699 external_relocs
, false,
700 (struct internal_reloc
*) NULL
)
705 if (enclosing
!= NULL
706 && coff_section_data (abfd
, enclosing
) != NULL
707 && coff_section_data (abfd
, enclosing
)->relocs
!= NULL
)
711 off
= ((sec
->rel_filepos
- enclosing
->rel_filepos
)
712 / bfd_coff_relsz (abfd
));
713 if (! require_internal
)
714 return coff_section_data (abfd
, enclosing
)->relocs
+ off
;
715 memcpy (internal_relocs
,
716 coff_section_data (abfd
, enclosing
)->relocs
+ off
,
717 sec
->reloc_count
* sizeof (struct internal_reloc
));
718 return internal_relocs
;
722 return _bfd_coff_read_internal_relocs (abfd
, sec
, cache
, external_relocs
,
723 require_internal
, internal_relocs
);
726 /* Given an XCOFF BFD, add symbols to the global hash table as
730 _bfd_xcoff_bfd_link_add_symbols (abfd
, info
)
732 struct bfd_link_info
*info
;
734 switch (bfd_get_format (abfd
))
737 return xcoff_link_add_object_symbols (abfd
, info
);
739 return (_bfd_generic_link_add_archive_symbols
740 (abfd
, info
, xcoff_link_check_archive_element
));
742 bfd_set_error (bfd_error_wrong_format
);
747 /* Add symbols from an XCOFF object file. */
750 xcoff_link_add_object_symbols (abfd
, info
)
752 struct bfd_link_info
*info
;
754 if (! _bfd_coff_get_external_symbols (abfd
))
756 if (! xcoff_link_add_symbols (abfd
, info
))
758 if (! info
->keep_memory
)
760 if (! _bfd_coff_free_symbols (abfd
))
766 /* Check a single archive element to see if we need to include it in
767 the link. *PNEEDED is set according to whether this element is
768 needed in the link or not. This is called via
769 _bfd_generic_link_add_archive_symbols. */
772 xcoff_link_check_archive_element (abfd
, info
, pneeded
)
774 struct bfd_link_info
*info
;
777 if (! _bfd_coff_get_external_symbols (abfd
))
780 if (! xcoff_link_check_ar_symbols (abfd
, info
, pneeded
))
785 if (! xcoff_link_add_symbols (abfd
, info
))
789 if (! info
->keep_memory
|| ! *pneeded
)
791 if (! _bfd_coff_free_symbols (abfd
))
798 /* Look through the symbols to see if this object file should be
799 included in the link. */
802 xcoff_link_check_ar_symbols (abfd
, info
, pneeded
)
804 struct bfd_link_info
*info
;
807 bfd_size_type symesz
;
813 symesz
= bfd_coff_symesz (abfd
);
814 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
815 esym_end
= esym
+ obj_raw_syment_count (abfd
) * symesz
;
816 while (esym
< esym_end
)
818 struct internal_syment sym
;
820 bfd_coff_swap_sym_in (abfd
, (PTR
) esym
, (PTR
) &sym
);
822 if (sym
.n_sclass
== C_EXT
&& sym
.n_scnum
!= N_UNDEF
)
825 char buf
[SYMNMLEN
+ 1];
826 struct bfd_link_hash_entry
*h
;
828 /* This symbol is externally visible, and is defined by this
831 name
= _bfd_coff_internal_syment_name (abfd
, &sym
, buf
);
834 h
= bfd_link_hash_lookup (info
->hash
, name
, false, false, true);
836 /* We are only interested in symbols that are currently
837 undefined. If a symbol is currently known to be common,
838 XCOFF linkers do not bring in an object file which
839 defines it. We also don't bring in symbols to satisfy
840 undefined references in shared objects. */
841 if (h
!= (struct bfd_link_hash_entry
*) NULL
842 && h
->type
== bfd_link_hash_undefined
)
844 if (! (*info
->callbacks
->add_archive_element
) (info
, abfd
, name
))
851 esym
+= (sym
.n_numaux
+ 1) * symesz
;
854 /* We do not need this object file. */
858 /* Returns the index of reloc in RELOCS with the least address greater
859 than or equal to ADDRESS. The relocs are sorted by address. */
862 xcoff_find_reloc (relocs
, count
, address
)
863 struct internal_reloc
*relocs
;
867 bfd_size_type min
, max
, this;
871 if (count
== 1 && relocs
[0].r_vaddr
< address
)
880 /* Do a binary search over (min,max]. */
881 while (min
+ 1 < max
)
885 this = (max
+ min
) / 2;
886 raddr
= relocs
[this].r_vaddr
;
889 else if (raddr
< address
)
898 if (relocs
[min
].r_vaddr
< address
)
902 && relocs
[min
- 1].r_vaddr
== address
)
908 /* Add all the symbols from an object file to the hash table.
910 XCOFF is a weird format. A normal XCOFF .o files will have three
911 COFF sections--.text, .data, and .bss--but each COFF section will
912 contain many csects. These csects are described in the symbol
913 table. From the linker's point of view, each csect must be
914 considered a section in its own right. For example, a TOC entry is
915 handled as a small XMC_TC csect. The linker must be able to merge
916 different TOC entries together, which means that it must be able to
917 extract the XMC_TC csects from the .data section of the input .o
920 From the point of view of our linker, this is, of course, a hideous
921 nightmare. We cope by actually creating sections for each csect,
922 and discarding the original sections. We then have to handle the
923 relocation entries carefully, since the only way to tell which
924 csect they belong to is to examine the address. */
927 xcoff_link_add_symbols (abfd
, info
)
929 struct bfd_link_info
*info
;
931 unsigned int n_tmask
;
932 unsigned int n_btshft
;
933 boolean default_copy
;
934 bfd_size_type symcount
;
935 struct xcoff_link_hash_entry
**sym_hash
;
936 asection
**csect_cache
;
937 bfd_size_type linesz
;
942 unsigned int csect_index
;
943 asection
*first_csect
;
944 bfd_size_type symesz
;
947 struct reloc_info_struct
949 struct internal_reloc
*relocs
;
952 } *reloc_info
= NULL
;
954 if ((abfd
->flags
& DYNAMIC
) != 0
955 && ! info
->static_link
)
956 return xcoff_link_add_dynamic_symbols (abfd
, info
);
958 n_tmask
= coff_data (abfd
)->local_n_tmask
;
959 n_btshft
= coff_data (abfd
)->local_n_btshft
;
961 /* Define macros so that ISFCN, et. al., macros work correctly. */
962 #define N_TMASK n_tmask
963 #define N_BTSHFT n_btshft
965 /* We need to build a .loader section, so we do it here. This won't
966 work if we're producing an XCOFF output file with no non dynamic
967 XCOFF input files. FIXME. */
968 if (xcoff_hash_table (info
)->loader_section
== NULL
)
972 lsec
= bfd_make_section_anyway (abfd
, ".loader");
975 xcoff_hash_table (info
)->loader_section
= lsec
;
976 lsec
->flags
|= SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
978 /* Likewise for the linkage section. */
979 if (xcoff_hash_table (info
)->linkage_section
== NULL
)
983 lsec
= bfd_make_section_anyway (abfd
, ".gl");
986 xcoff_hash_table (info
)->linkage_section
= lsec
;
987 lsec
->flags
|= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
988 lsec
->alignment_power
= 2;
990 /* Likewise for the TOC section. */
991 if (xcoff_hash_table (info
)->toc_section
== NULL
)
995 tsec
= bfd_make_section_anyway (abfd
, ".tc");
998 xcoff_hash_table (info
)->toc_section
= tsec
;
999 tsec
->flags
|= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
1000 tsec
->alignment_power
= 2;
1002 /* Likewise for the descriptor section. */
1003 if (xcoff_hash_table (info
)->descriptor_section
== NULL
)
1007 dsec
= bfd_make_section_anyway (abfd
, ".ds");
1010 xcoff_hash_table (info
)->descriptor_section
= dsec
;
1011 dsec
->flags
|= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
1012 dsec
->alignment_power
= 2;
1014 /* Likewise for the .debug section. */
1015 if (xcoff_hash_table (info
)->debug_section
== NULL
)
1019 dsec
= bfd_make_section_anyway (abfd
, ".debug");
1022 xcoff_hash_table (info
)->debug_section
= dsec
;
1023 dsec
->flags
|= SEC_HAS_CONTENTS
| SEC_IN_MEMORY
;
1026 if (info
->keep_memory
)
1027 default_copy
= false;
1029 default_copy
= true;
1031 symcount
= obj_raw_syment_count (abfd
);
1033 /* We keep a list of the linker hash table entries that correspond
1034 to each external symbol. */
1035 sym_hash
= ((struct xcoff_link_hash_entry
**)
1038 * sizeof (struct xcoff_link_hash_entry
*))));
1039 if (sym_hash
== NULL
&& symcount
!= 0)
1041 coff_data (abfd
)->sym_hashes
= (struct coff_link_hash_entry
**) sym_hash
;
1042 memset (sym_hash
, 0,
1043 (size_t) symcount
* sizeof (struct xcoff_link_hash_entry
*));
1045 /* Because of the weird stuff we are doing with XCOFF csects, we can
1046 not easily determine which section a symbol is in, so we store
1047 the information in the tdata for the input file. */
1048 csect_cache
= ((asection
**)
1049 bfd_alloc (abfd
, symcount
* sizeof (asection
*)));
1050 if (csect_cache
== NULL
&& symcount
!= 0)
1052 xcoff_data (abfd
)->csects
= csect_cache
;
1053 memset (csect_cache
, 0, (size_t) symcount
* sizeof (asection
*));
1055 /* While splitting sections into csects, we need to assign the
1056 relocs correctly. The relocs and the csects must both be in
1057 order by VMA within a given section, so we handle this by
1058 scanning along the relocs as we process the csects. We index
1059 into reloc_info using the section target_index. */
1060 reloc_info
= ((struct reloc_info_struct
*)
1061 bfd_malloc ((abfd
->section_count
+ 1)
1062 * sizeof (struct reloc_info_struct
)));
1063 if (reloc_info
== NULL
)
1065 memset ((PTR
) reloc_info
, 0,
1066 (abfd
->section_count
+ 1) * sizeof (struct reloc_info_struct
));
1068 /* Read in the relocs and line numbers for each section. */
1069 linesz
= bfd_coff_linesz (abfd
);
1071 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
1074 if ((o
->flags
& SEC_RELOC
) != 0)
1076 reloc_info
[o
->target_index
].relocs
=
1077 xcoff_read_internal_relocs (abfd
, o
, true, (bfd_byte
*) NULL
,
1078 false, (struct internal_reloc
*) NULL
);
1079 reloc_info
[o
->target_index
].csects
=
1080 (asection
**) bfd_malloc (o
->reloc_count
* sizeof (asection
*));
1081 if (reloc_info
[o
->target_index
].csects
== NULL
)
1083 memset (reloc_info
[o
->target_index
].csects
, 0,
1084 o
->reloc_count
* sizeof (asection
*));
1087 if ((info
->strip
== strip_none
|| info
->strip
== strip_some
)
1088 && o
->lineno_count
> 0)
1092 linenos
= (bfd_byte
*) bfd_malloc (o
->lineno_count
* linesz
);
1093 if (linenos
== NULL
)
1095 reloc_info
[o
->target_index
].linenos
= linenos
;
1096 if (bfd_seek (abfd
, o
->line_filepos
, SEEK_SET
) != 0
1097 || (bfd_read (linenos
, linesz
, o
->lineno_count
, abfd
)
1098 != linesz
* o
->lineno_count
))
1103 /* Don't let the linker relocation routines discard the symbols. */
1104 keep_syms
= obj_coff_keep_syms (abfd
);
1105 obj_coff_keep_syms (abfd
) = true;
1111 symesz
= bfd_coff_symesz (abfd
);
1112 BFD_ASSERT (symesz
== bfd_coff_auxesz (abfd
));
1113 esym
= (bfd_byte
*) obj_coff_external_syms (abfd
);
1114 esym_end
= esym
+ symcount
* symesz
;
1115 while (esym
< esym_end
)
1117 struct internal_syment sym
;
1118 union internal_auxent aux
;
1120 char buf
[SYMNMLEN
+ 1];
1125 struct xcoff_link_hash_entry
*set_toc
;
1127 bfd_coff_swap_sym_in (abfd
, (PTR
) esym
, (PTR
) &sym
);
1129 /* In this pass we are only interested in symbols with csect
1131 if (sym
.n_sclass
!= C_EXT
&& sym
.n_sclass
!= C_HIDEXT
)
1133 if (sym
.n_sclass
== C_FILE
&& csect
!= NULL
)
1135 xcoff_section_data (abfd
, csect
)->last_symndx
=
1137 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1143 *csect_cache
= csect
;
1144 else if (first_csect
== NULL
|| sym
.n_sclass
== C_FILE
)
1145 *csect_cache
= coff_section_from_bfd_index (abfd
, sym
.n_scnum
);
1147 *csect_cache
= NULL
;
1148 esym
+= (sym
.n_numaux
+ 1) * symesz
;
1149 sym_hash
+= sym
.n_numaux
+ 1;
1150 csect_cache
+= sym
.n_numaux
+ 1;
1154 name
= _bfd_coff_internal_syment_name (abfd
, &sym
, buf
);
1158 /* If this symbol has line number information attached to it,
1159 and we're not stripping it, count the number of entries and
1160 add them to the count for this csect. In the final link pass
1161 we are going to attach line number information by symbol,
1162 rather than by section, in order to more easily handle
1163 garbage collection. */
1164 if ((info
->strip
== strip_none
|| info
->strip
== strip_some
)
1167 && ISFCN (sym
.n_type
))
1169 union internal_auxent auxlin
;
1171 bfd_coff_swap_aux_in (abfd
, (PTR
) (esym
+ symesz
),
1172 sym
.n_type
, sym
.n_sclass
,
1173 0, sym
.n_numaux
, (PTR
) &auxlin
);
1174 if (auxlin
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
!= 0)
1176 asection
*enclosing
;
1177 bfd_size_type linoff
;
1179 enclosing
= xcoff_section_data (abfd
, csect
)->enclosing
;
1180 if (enclosing
== NULL
)
1182 (*_bfd_error_handler
)
1183 ("%s: `%s' has line numbers but no enclosing section",
1184 bfd_get_filename (abfd
), name
);
1185 bfd_set_error (bfd_error_bad_value
);
1188 linoff
= (auxlin
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
1189 - enclosing
->line_filepos
);
1190 if (linoff
< enclosing
->lineno_count
* linesz
)
1192 struct internal_lineno lin
;
1193 bfd_byte
*linpstart
;
1195 linpstart
= (reloc_info
[enclosing
->target_index
].linenos
1197 bfd_coff_swap_lineno_in (abfd
, (PTR
) linpstart
, (PTR
) &lin
);
1199 && ((bfd_size_type
) lin
.l_addr
.l_symndx
1201 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1204 bfd_byte
*linpend
, *linp
;
1206 linpend
= (reloc_info
[enclosing
->target_index
].linenos
1207 + enclosing
->lineno_count
* linesz
);
1208 for (linp
= linpstart
+ linesz
;
1212 bfd_coff_swap_lineno_in (abfd
, (PTR
) linp
,
1214 if (lin
.l_lnno
== 0)
1217 csect
->lineno_count
+= (linp
- linpstart
) / linesz
;
1218 /* The setting of line_filepos will only be
1219 useful if all the line number entries for a
1220 csect are contiguous; this only matters for
1222 if (csect
->line_filepos
== 0)
1223 csect
->line_filepos
=
1224 auxlin
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
1230 /* Pick up the csect auxiliary information. */
1232 if (sym
.n_numaux
== 0)
1234 (*_bfd_error_handler
)
1235 ("%s: class %d symbol `%s' has no aux entries",
1236 bfd_get_filename (abfd
), sym
.n_sclass
, name
);
1237 bfd_set_error (bfd_error_bad_value
);
1241 bfd_coff_swap_aux_in (abfd
,
1242 (PTR
) (esym
+ symesz
* sym
.n_numaux
),
1243 sym
.n_type
, sym
.n_sclass
,
1244 sym
.n_numaux
- 1, sym
.n_numaux
,
1247 smtyp
= SMTYP_SMTYP (aux
.x_csect
.x_smtyp
);
1257 (*_bfd_error_handler
)
1258 ("%s: symbol `%s' has unrecognized csect type %d",
1259 bfd_get_filename (abfd
), name
, smtyp
);
1260 bfd_set_error (bfd_error_bad_value
);
1264 /* This is an external reference. */
1265 if (sym
.n_sclass
== C_HIDEXT
1266 || sym
.n_scnum
!= N_UNDEF
1267 || aux
.x_csect
.x_scnlen
.l
!= 0)
1269 (*_bfd_error_handler
)
1270 ("%s: bad XTY_ER symbol `%s': class %d scnum %d scnlen %d",
1271 bfd_get_filename (abfd
), name
, sym
.n_sclass
, sym
.n_scnum
,
1272 aux
.x_csect
.x_scnlen
.l
);
1273 bfd_set_error (bfd_error_bad_value
);
1277 /* An XMC_XO external reference is actually a reference to
1278 an absolute location. */
1279 if (aux
.x_csect
.x_smclas
!= XMC_XO
)
1280 section
= bfd_und_section_ptr
;
1283 section
= bfd_abs_section_ptr
;
1284 value
= sym
.n_value
;
1289 /* This is a csect definition. */
1293 xcoff_section_data (abfd
, csect
)->last_symndx
=
1295 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1302 /* When we see a TOC anchor, we record the TOC value. */
1303 if (aux
.x_csect
.x_smclas
== XMC_TC0
)
1305 if (sym
.n_sclass
!= C_HIDEXT
1306 || aux
.x_csect
.x_scnlen
.l
!= 0)
1308 (*_bfd_error_handler
)
1309 ("%s: XMC_TC0 symbol `%s' is class %d scnlen %d",
1310 bfd_get_filename (abfd
), name
, sym
.n_sclass
,
1311 aux
.x_csect
.x_scnlen
.l
);
1312 bfd_set_error (bfd_error_bad_value
);
1315 xcoff_data (abfd
)->toc
= sym
.n_value
;
1318 /* We must merge TOC entries for the same symbol. We can
1319 merge two TOC entries if they are both C_HIDEXT, they
1320 both have the same name, they are both 4 bytes long, and
1321 they both have a relocation table entry for an external
1322 symbol with the same name. Unfortunately, this means
1323 that we must look through the relocations. Ick. */
1324 if (aux
.x_csect
.x_smclas
== XMC_TC
1325 && sym
.n_sclass
== C_HIDEXT
1326 && aux
.x_csect
.x_scnlen
.l
== 4
1327 && info
->hash
->creator
== abfd
->xvec
)
1329 asection
*enclosing
;
1330 struct internal_reloc
*relocs
;
1331 bfd_size_type relindx
;
1332 struct internal_reloc
*rel
;
1334 enclosing
= coff_section_from_bfd_index (abfd
, sym
.n_scnum
);
1335 if (enclosing
== NULL
)
1338 relocs
= reloc_info
[enclosing
->target_index
].relocs
;
1339 relindx
= xcoff_find_reloc (relocs
, enclosing
->reloc_count
,
1341 rel
= relocs
+ relindx
;
1342 if (relindx
< enclosing
->reloc_count
1343 && rel
->r_vaddr
== (bfd_vma
) sym
.n_value
1344 && rel
->r_size
== 31
1345 && rel
->r_type
== R_POS
)
1348 struct internal_syment relsym
;
1350 erelsym
= ((bfd_byte
*) obj_coff_external_syms (abfd
)
1351 + rel
->r_symndx
* symesz
);
1352 bfd_coff_swap_sym_in (abfd
, (PTR
) erelsym
, (PTR
) &relsym
);
1353 if (relsym
.n_sclass
== C_EXT
)
1355 const char *relname
;
1356 char relbuf
[SYMNMLEN
+ 1];
1358 struct xcoff_link_hash_entry
*h
;
1360 /* At this point we know that the TOC entry is
1361 for an externally visible symbol. */
1362 relname
= _bfd_coff_internal_syment_name (abfd
, &relsym
,
1364 if (relname
== NULL
)
1367 /* We only merge TOC entries if the TC name is
1368 the same as the symbol name. This handles
1369 the normal case, but not common cases like
1370 SYM.P4 which gcc generates to store SYM + 4
1371 in the TOC. FIXME. */
1372 if (strcmp (name
, relname
) == 0)
1374 copy
= (! info
->keep_memory
1375 || relsym
._n
._n_n
._n_zeroes
!= 0
1376 || relsym
._n
._n_n
._n_offset
== 0);
1377 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
1378 relname
, true, copy
,
1383 /* At this point h->root.type could be
1384 bfd_link_hash_new. That should be OK,
1385 since we know for sure that we will come
1386 across this symbol as we step through the
1389 /* We store h in *sym_hash for the
1390 convenience of the relocate_section
1394 if (h
->toc_section
!= NULL
)
1396 asection
**rel_csects
;
1398 /* We already have a TOC entry for this
1399 symbol, so we can just ignore this
1402 reloc_info
[enclosing
->target_index
].csects
;
1403 rel_csects
[relindx
] = bfd_und_section_ptr
;
1407 /* We are about to create a TOC entry for
1415 /* We need to create a new section. We get the name from
1416 the csect storage mapping class, so that the linker can
1417 accumulate similar csects together. */
1419 static const char *csect_name_by_class
[] =
1421 ".pr", ".ro", ".db", ".tc", ".ua", ".rw", ".gl", ".xo",
1422 ".sv", ".bs", ".ds", ".uc", ".ti", ".tb", NULL
, ".tc0",
1425 const char *csect_name
;
1426 asection
*enclosing
;
1428 if ((aux
.x_csect
.x_smclas
>=
1429 sizeof csect_name_by_class
/ sizeof csect_name_by_class
[0])
1430 || csect_name_by_class
[aux
.x_csect
.x_smclas
] == NULL
)
1432 (*_bfd_error_handler
)
1433 ("%s: symbol `%s' has unrecognized smclas %d",
1434 bfd_get_filename (abfd
), name
, aux
.x_csect
.x_smclas
);
1435 bfd_set_error (bfd_error_bad_value
);
1439 csect_name
= csect_name_by_class
[aux
.x_csect
.x_smclas
];
1440 csect
= bfd_make_section_anyway (abfd
, csect_name
);
1443 enclosing
= coff_section_from_bfd_index (abfd
, sym
.n_scnum
);
1444 if (enclosing
== NULL
)
1446 if (! bfd_is_abs_section (enclosing
)
1447 && ((bfd_vma
) sym
.n_value
< enclosing
->vma
1448 || ((bfd_vma
) sym
.n_value
+ aux
.x_csect
.x_scnlen
.l
1449 > enclosing
->vma
+ enclosing
->_raw_size
)))
1451 (*_bfd_error_handler
)
1452 ("%s: csect `%s' not in enclosing section",
1453 bfd_get_filename (abfd
), name
);
1454 bfd_set_error (bfd_error_bad_value
);
1457 csect
->vma
= sym
.n_value
;
1458 csect
->filepos
= (enclosing
->filepos
1461 csect
->_raw_size
= aux
.x_csect
.x_scnlen
.l
;
1462 csect
->flags
|= SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
;
1463 csect
->alignment_power
= SMTYP_ALIGN (aux
.x_csect
.x_smtyp
);
1465 /* Record the enclosing section in the tdata for this new
1467 csect
->used_by_bfd
=
1468 ((struct coff_section_tdata
*)
1469 bfd_zalloc (abfd
, sizeof (struct coff_section_tdata
)));
1470 if (csect
->used_by_bfd
== NULL
)
1472 coff_section_data (abfd
, csect
)->tdata
=
1473 bfd_zalloc (abfd
, sizeof (struct xcoff_section_tdata
));
1474 if (coff_section_data (abfd
, csect
)->tdata
== NULL
)
1476 xcoff_section_data (abfd
, csect
)->enclosing
= enclosing
;
1477 xcoff_section_data (abfd
, csect
)->lineno_count
=
1478 enclosing
->lineno_count
;
1480 if (enclosing
->owner
== abfd
)
1482 struct internal_reloc
*relocs
;
1483 bfd_size_type relindx
;
1484 struct internal_reloc
*rel
;
1485 asection
**rel_csect
;
1487 relocs
= reloc_info
[enclosing
->target_index
].relocs
;
1488 relindx
= xcoff_find_reloc (relocs
, enclosing
->reloc_count
,
1490 rel
= relocs
+ relindx
;
1491 rel_csect
= (reloc_info
[enclosing
->target_index
].csects
1493 csect
->rel_filepos
= (enclosing
->rel_filepos
1494 + relindx
* bfd_coff_relsz (abfd
));
1495 while (relindx
< enclosing
->reloc_count
1496 && *rel_csect
== NULL
1497 && rel
->r_vaddr
< csect
->vma
+ csect
->_raw_size
)
1500 csect
->flags
|= SEC_RELOC
;
1501 ++csect
->reloc_count
;
1508 /* There are a number of other fields and section flags
1509 which we do not bother to set. */
1511 csect_index
= ((esym
1512 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1515 xcoff_section_data (abfd
, csect
)->first_symndx
= csect_index
;
1517 if (first_csect
== NULL
)
1518 first_csect
= csect
;
1520 /* If this symbol is C_EXT, we treat it as starting at the
1521 beginning of the newly created section. */
1522 if (sym
.n_sclass
== C_EXT
)
1528 /* If this is a TOC section for a symbol, record it. */
1529 if (set_toc
!= NULL
)
1530 set_toc
->toc_section
= csect
;
1535 /* This is a label definition. The x_scnlen field is the
1536 symbol index of the csect. I believe that this must
1537 always follow the appropriate XTY_SD symbol, so I will
1543 if (aux
.x_csect
.x_scnlen
.l
< 0
1544 || (aux
.x_csect
.x_scnlen
.l
1545 >= esym
- (bfd_byte
*) obj_coff_external_syms (abfd
)))
1549 section
= xcoff_data (abfd
)->csects
[aux
.x_csect
.x_scnlen
.l
];
1551 || (section
->flags
& SEC_HAS_CONTENTS
) == 0)
1556 (*_bfd_error_handler
)
1557 ("%s: misplaced XTY_LD `%s'",
1558 bfd_get_filename (abfd
), name
);
1559 bfd_set_error (bfd_error_bad_value
);
1563 value
= sym
.n_value
- csect
->vma
;
1568 /* This is an unitialized csect. We could base the name on
1569 the storage mapping class, but we don't bother. If this
1570 csect is externally visible, it is a common symbol. */
1574 xcoff_section_data (abfd
, csect
)->last_symndx
=
1576 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1580 csect
= bfd_make_section_anyway (abfd
, ".bss");
1583 csect
->vma
= sym
.n_value
;
1584 csect
->_raw_size
= aux
.x_csect
.x_scnlen
.l
;
1585 csect
->flags
|= SEC_ALLOC
;
1586 csect
->alignment_power
= SMTYP_ALIGN (aux
.x_csect
.x_smtyp
);
1587 /* There are a number of other fields and section flags
1588 which we do not bother to set. */
1590 csect_index
= ((esym
1591 - (bfd_byte
*) obj_coff_external_syms (abfd
))
1594 csect
->used_by_bfd
=
1595 ((struct coff_section_tdata
*)
1596 bfd_zalloc (abfd
, sizeof (struct coff_section_tdata
)));
1597 if (csect
->used_by_bfd
== NULL
)
1599 coff_section_data (abfd
, csect
)->tdata
=
1600 bfd_zalloc (abfd
, sizeof (struct xcoff_section_tdata
));
1601 if (coff_section_data (abfd
, csect
)->tdata
== NULL
)
1603 xcoff_section_data (abfd
, csect
)->first_symndx
= csect_index
;
1605 if (first_csect
== NULL
)
1606 first_csect
= csect
;
1608 if (sym
.n_sclass
== C_EXT
)
1610 csect
->flags
|= SEC_IS_COMMON
;
1611 csect
->_raw_size
= 0;
1613 value
= aux
.x_csect
.x_scnlen
.l
;
1619 /* Check for magic symbol names. */
1620 if ((smtyp
== XTY_SD
|| smtyp
== XTY_CM
)
1621 && aux
.x_csect
.x_smclas
!= XMC_TC
)
1628 if (strcmp (name
, "_text") == 0)
1630 else if (strcmp (name
, "_etext") == 0)
1632 else if (strcmp (name
, "_data") == 0)
1634 else if (strcmp (name
, "_edata") == 0)
1636 else if (strcmp (name
, "_end") == 0)
1639 else if (name
[0] == 'e' && strcmp (name
, "end") == 0)
1643 xcoff_hash_table (info
)->special_sections
[i
] = csect
;
1646 /* Now we have enough information to add the symbol to the
1647 linker hash table. */
1649 if (sym
.n_sclass
== C_EXT
)
1653 BFD_ASSERT (section
!= NULL
);
1655 /* We must copy the name into memory if we got it from the
1656 syment itself, rather than the string table. */
1657 copy
= default_copy
;
1658 if (sym
._n
._n_n
._n_zeroes
!= 0
1659 || sym
._n
._n_n
._n_offset
== 0)
1662 if (info
->hash
->creator
== abfd
->xvec
)
1664 /* If we are statically linking a shared object, it is
1665 OK for symbol redefinitions to occur. I can't figure
1666 out just what the XCOFF linker is doing, but
1667 something like this is required for -bnso to work. */
1668 *sym_hash
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
1669 name
, true, copy
, false);
1670 if (*sym_hash
== NULL
)
1672 if (((*sym_hash
)->root
.type
== bfd_link_hash_defined
1673 || (*sym_hash
)->root
.type
== bfd_link_hash_defweak
)
1674 && ! bfd_is_und_section (section
)
1675 && ! bfd_is_com_section (section
))
1677 if ((abfd
->flags
& DYNAMIC
) != 0)
1679 section
= bfd_und_section_ptr
;
1682 else if (((*sym_hash
)->root
.u
.def
.section
->owner
->flags
1685 (*sym_hash
)->root
.type
= bfd_link_hash_undefined
;
1686 (*sym_hash
)->root
.u
.undef
.abfd
=
1687 (*sym_hash
)->root
.u
.def
.section
->owner
;
1692 /* _bfd_generic_link_add_one_symbol may call the linker to
1693 generate an error message, and the linker may try to read
1694 the symbol table to give a good error. Right now, the
1695 line numbers are in an inconsistent state, since they are
1696 counted both in the real sections and in the new csects.
1697 We need to leave the count in the real sections so that
1698 the linker can report the line number of the error
1699 correctly, so temporarily clobber the link to the csects
1700 so that the linker will not try to read the line numbers
1701 a second time from the csects. */
1702 BFD_ASSERT (last_real
->next
== first_csect
);
1703 last_real
->next
= NULL
;
1704 if (! (_bfd_generic_link_add_one_symbol
1705 (info
, abfd
, name
, flags
, section
, value
,
1706 (const char *) NULL
, copy
, true,
1707 (struct bfd_link_hash_entry
**) sym_hash
)))
1709 last_real
->next
= first_csect
;
1711 if (smtyp
== XTY_CM
)
1713 if ((*sym_hash
)->root
.type
!= bfd_link_hash_common
1714 || (*sym_hash
)->root
.u
.c
.p
->section
!= csect
)
1716 /* We don't need the common csect we just created. */
1717 csect
->_raw_size
= 0;
1721 (*sym_hash
)->root
.u
.c
.p
->alignment_power
1722 = csect
->alignment_power
;
1726 if (info
->hash
->creator
== abfd
->xvec
)
1730 if (smtyp
== XTY_ER
|| smtyp
== XTY_CM
)
1731 flag
= XCOFF_REF_REGULAR
;
1733 flag
= XCOFF_DEF_REGULAR
;
1734 (*sym_hash
)->flags
|= flag
;
1736 if ((*sym_hash
)->smclas
== XMC_UA
1737 || flag
== XCOFF_DEF_REGULAR
)
1738 (*sym_hash
)->smclas
= aux
.x_csect
.x_smclas
;
1742 *csect_cache
= csect
;
1744 esym
+= (sym
.n_numaux
+ 1) * symesz
;
1745 sym_hash
+= sym
.n_numaux
+ 1;
1746 csect_cache
+= sym
.n_numaux
+ 1;
1749 BFD_ASSERT (last_real
== NULL
|| last_real
->next
== first_csect
);
1751 /* Make sure that we have seen all the relocs. */
1752 for (o
= abfd
->sections
; o
!= first_csect
; o
= o
->next
)
1754 /* Reset the section size and the line numebr count, since the
1755 data is now attached to the csects. Don't reset the size of
1756 the .debug section, since we need to read it below in
1757 bfd_xcoff_size_dynamic_sections. */
1758 if (strcmp (bfd_get_section_name (abfd
, o
), ".debug") != 0)
1760 o
->lineno_count
= 0;
1762 if ((o
->flags
& SEC_RELOC
) != 0)
1765 struct internal_reloc
*rel
;
1766 asection
**rel_csect
;
1768 rel
= reloc_info
[o
->target_index
].relocs
;
1769 rel_csect
= reloc_info
[o
->target_index
].csects
;
1770 for (i
= 0; i
< o
->reloc_count
; i
++, rel
++, rel_csect
++)
1772 if (*rel_csect
== NULL
)
1774 (*_bfd_error_handler
)
1775 ("%s: reloc %s:%d not in csect",
1776 bfd_get_filename (abfd
), o
->name
, i
);
1777 bfd_set_error (bfd_error_bad_value
);
1781 /* We identify all symbols which are called, so that we
1782 can create glue code for calls to functions imported
1783 from dynamic objects. */
1784 if (info
->hash
->creator
== abfd
->xvec
1785 && *rel_csect
!= bfd_und_section_ptr
1786 && (rel
->r_type
== R_BR
1787 || rel
->r_type
== R_RBR
)
1788 && obj_xcoff_sym_hashes (abfd
)[rel
->r_symndx
] != NULL
)
1790 struct xcoff_link_hash_entry
*h
;
1792 h
= obj_xcoff_sym_hashes (abfd
)[rel
->r_symndx
];
1793 h
->flags
|= XCOFF_CALLED
;
1794 /* If the symbol name starts with a period, it is
1795 the code of a function. If the symbol is
1796 currently undefined, then add an undefined symbol
1797 for the function descriptor. This should do no
1798 harm, because any regular object that defines the
1799 function should also define the function
1800 descriptor. It helps, because it means that we
1801 will identify the function descriptor with a
1802 dynamic object if a dynamic object defines it. */
1803 if (h
->root
.root
.string
[0] == '.'
1804 && h
->descriptor
== NULL
)
1806 struct xcoff_link_hash_entry
*hds
;
1808 hds
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
1809 h
->root
.root
.string
+ 1,
1813 if (hds
->root
.type
== bfd_link_hash_new
)
1815 if (! (_bfd_generic_link_add_one_symbol
1816 (info
, abfd
, hds
->root
.root
.string
,
1817 (flagword
) 0, bfd_und_section_ptr
,
1818 (bfd_vma
) 0, (const char *) NULL
, false,
1820 (struct bfd_link_hash_entry
**) &hds
)))
1823 hds
->flags
|= XCOFF_DESCRIPTOR
;
1824 BFD_ASSERT ((hds
->flags
& XCOFF_CALLED
) == 0
1825 && (h
->flags
& XCOFF_DESCRIPTOR
) == 0);
1826 hds
->descriptor
= h
;
1827 h
->descriptor
= hds
;
1832 free (reloc_info
[o
->target_index
].csects
);
1833 reloc_info
[o
->target_index
].csects
= NULL
;
1835 /* Reset SEC_RELOC and the reloc_count, since the reloc
1836 information is now attached to the csects. */
1837 o
->flags
&=~ SEC_RELOC
;
1840 /* If we are not keeping memory, free the reloc information. */
1841 if (! info
->keep_memory
1842 && coff_section_data (abfd
, o
) != NULL
1843 && coff_section_data (abfd
, o
)->relocs
!= NULL
1844 && ! coff_section_data (abfd
, o
)->keep_relocs
)
1846 free (coff_section_data (abfd
, o
)->relocs
);
1847 coff_section_data (abfd
, o
)->relocs
= NULL
;
1851 /* Free up the line numbers. FIXME: We could cache these
1852 somewhere for the final link, to avoid reading them again. */
1853 if (reloc_info
[o
->target_index
].linenos
!= NULL
)
1855 free (reloc_info
[o
->target_index
].linenos
);
1856 reloc_info
[o
->target_index
].linenos
= NULL
;
1862 obj_coff_keep_syms (abfd
) = keep_syms
;
1867 if (reloc_info
!= NULL
)
1869 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
1871 if (reloc_info
[o
->target_index
].csects
!= NULL
)
1872 free (reloc_info
[o
->target_index
].csects
);
1873 if (reloc_info
[o
->target_index
].linenos
!= NULL
)
1874 free (reloc_info
[o
->target_index
].linenos
);
1878 obj_coff_keep_syms (abfd
) = keep_syms
;
1885 /* This function is used to add symbols from a dynamic object to the
1886 global symbol table. */
1889 xcoff_link_add_dynamic_symbols (abfd
, info
)
1891 struct bfd_link_info
*info
;
1894 bfd_byte
*buf
= NULL
;
1895 struct internal_ldhdr ldhdr
;
1896 const char *strings
;
1897 struct external_ldsym
*elsym
, *elsymend
;
1898 struct xcoff_import_file
*n
;
1903 struct xcoff_import_file
**pp
;
1905 /* We can only handle a dynamic object if we are generating an XCOFF
1907 if (info
->hash
->creator
!= abfd
->xvec
)
1909 (*_bfd_error_handler
)
1910 ("%s: XCOFF shared object when not producing XCOFF output",
1911 bfd_get_filename (abfd
));
1912 bfd_set_error (bfd_error_invalid_operation
);
1916 /* The symbols we use from a dynamic object are not the symbols in
1917 the normal symbol table, but, rather, the symbols in the export
1918 table. If there is a global symbol in a dynamic object which is
1919 not in the export table, the loader will not be able to find it,
1920 so we don't want to find it either. Also, on AIX 4.1.3, shr.o in
1921 libc.a has symbols in the export table which are not in the
1924 /* Read in the .loader section. FIXME: We should really use the
1925 o_snloader field in the a.out header, rather than grabbing the
1927 lsec
= bfd_get_section_by_name (abfd
, ".loader");
1930 (*_bfd_error_handler
)
1931 ("%s: dynamic object with no .loader section",
1932 bfd_get_filename (abfd
));
1933 bfd_set_error (bfd_error_no_symbols
);
1937 buf
= (bfd_byte
*) bfd_malloc (lsec
->_raw_size
);
1938 if (buf
== NULL
&& lsec
->_raw_size
> 0)
1941 if (! bfd_get_section_contents (abfd
, lsec
, (PTR
) buf
, (file_ptr
) 0,
1945 /* Remove the sections from this object, so that they do not get
1946 included in the link. */
1947 abfd
->sections
= NULL
;
1949 xcoff_swap_ldhdr_in (abfd
, (struct external_ldhdr
*) buf
, &ldhdr
);
1951 strings
= (char *) buf
+ ldhdr
.l_stoff
;
1953 elsym
= (struct external_ldsym
*) (buf
+ LDHDRSZ
);
1954 elsymend
= elsym
+ ldhdr
.l_nsyms
;
1955 BFD_ASSERT (sizeof (struct external_ldsym
) == LDSYMSZ
);
1956 for (; elsym
< elsymend
; elsym
++)
1958 struct internal_ldsym ldsym
;
1959 char nambuf
[SYMNMLEN
+ 1];
1961 struct xcoff_link_hash_entry
*h
;
1963 xcoff_swap_ldsym_in (abfd
, elsym
, &ldsym
);
1965 /* We are only interested in exported symbols. */
1966 if ((ldsym
.l_smtype
& L_EXPORT
) == 0)
1969 if (ldsym
._l
._l_l
._l_zeroes
== 0)
1970 name
= strings
+ ldsym
._l
._l_l
._l_offset
;
1973 memcpy (nambuf
, ldsym
._l
._l_name
, SYMNMLEN
);
1974 nambuf
[SYMNMLEN
] = '\0';
1978 /* Normally we could not xcoff_link_hash_lookup in an add
1979 symbols routine, since we might not be using an XCOFF hash
1980 table. However, we verified above that we are using an XCOFF
1983 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
), name
, true,
1988 h
->flags
|= XCOFF_DEF_DYNAMIC
;
1990 /* If the symbol is undefined, and the BFD it was found in is
1991 not a dynamic object, change the BFD to this dynamic object,
1992 so that we can get the correct import file ID. */
1993 if ((h
->root
.type
== bfd_link_hash_undefined
1994 || h
->root
.type
== bfd_link_hash_undefweak
)
1995 && (h
->root
.u
.undef
.abfd
== NULL
1996 || (h
->root
.u
.undef
.abfd
->flags
& DYNAMIC
) == 0))
1997 h
->root
.u
.undef
.abfd
= abfd
;
1999 if (h
->root
.type
== bfd_link_hash_new
)
2001 h
->root
.type
= bfd_link_hash_undefined
;
2002 h
->root
.u
.undef
.abfd
= abfd
;
2003 /* We do not want to add this to the undefined symbol list. */
2006 if (h
->smclas
== XMC_UA
2007 || h
->root
.type
== bfd_link_hash_undefined
2008 || h
->root
.type
== bfd_link_hash_undefweak
)
2009 h
->smclas
= ldsym
.l_smclas
;
2011 /* Unless this is an XMC_XO symbol, we don't bother to actually
2012 define it, since we don't have a section to put it in anyhow.
2013 Instead, the relocation routines handle the DEF_DYNAMIC flag
2016 if (h
->smclas
== XMC_XO
2017 && (h
->root
.type
== bfd_link_hash_undefined
2018 || h
->root
.type
== bfd_link_hash_undefweak
))
2020 /* This symbol has an absolute value. */
2021 h
->root
.type
= bfd_link_hash_defined
;
2022 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
2023 h
->root
.u
.def
.value
= ldsym
.l_value
;
2033 /* Record this file in the import files. */
2035 n
= ((struct xcoff_import_file
*)
2036 bfd_alloc (abfd
, sizeof (struct xcoff_import_file
)));
2041 /* For some reason, the path entry in the import file list for a
2042 shared object appears to always be empty. The file name is the
2045 if (abfd
->my_archive
== NULL
)
2047 bname
= bfd_get_filename (abfd
);
2052 bname
= bfd_get_filename (abfd
->my_archive
);
2053 mname
= bfd_get_filename (abfd
);
2055 s
= strrchr (bname
, '/');
2061 /* We start c at 1 because the first import file number is reserved
2063 for (pp
= &xcoff_hash_table (info
)->imports
, c
= 1;
2065 pp
= &(*pp
)->next
, ++c
)
2069 xcoff_data (abfd
)->import_file_id
= c
;
2079 /* Routines that are called after all the input files have been
2080 handled, but before the sections are laid out in memory. */
2082 /* Mark a symbol as not being garbage, including the section in which
2085 static INLINE boolean
2086 xcoff_mark_symbol (info
, h
)
2087 struct bfd_link_info
*info
;
2088 struct xcoff_link_hash_entry
*h
;
2090 if ((h
->flags
& XCOFF_MARK
) != 0)
2093 h
->flags
|= XCOFF_MARK
;
2094 if (h
->root
.type
== bfd_link_hash_defined
2095 || h
->root
.type
== bfd_link_hash_defweak
)
2099 hsec
= h
->root
.u
.def
.section
;
2100 if ((hsec
->flags
& SEC_MARK
) == 0)
2102 if (! xcoff_mark (info
, hsec
))
2107 if (h
->toc_section
!= NULL
2108 && (h
->toc_section
->flags
& SEC_MARK
) == 0)
2110 if (! xcoff_mark (info
, h
->toc_section
))
2117 /* The mark phase of garbage collection. For a given section, mark
2118 it, and all the sections which define symbols to which it refers.
2119 Because this function needs to look at the relocs, we also count
2120 the number of relocs which need to be copied into the .loader
2124 xcoff_mark (info
, sec
)
2125 struct bfd_link_info
*info
;
2128 if ((sec
->flags
& SEC_MARK
) != 0)
2131 sec
->flags
|= SEC_MARK
;
2133 if (sec
->owner
->xvec
== info
->hash
->creator
2134 && coff_section_data (sec
->owner
, sec
) != NULL
2135 && xcoff_section_data (sec
->owner
, sec
) != NULL
)
2137 register struct xcoff_link_hash_entry
**hp
, **hpend
;
2138 struct internal_reloc
*rel
, *relend
;
2140 /* Mark all the symbols in this section. */
2142 hp
= (obj_xcoff_sym_hashes (sec
->owner
)
2143 + xcoff_section_data (sec
->owner
, sec
)->first_symndx
);
2144 hpend
= (obj_xcoff_sym_hashes (sec
->owner
)
2145 + xcoff_section_data (sec
->owner
, sec
)->last_symndx
);
2146 for (; hp
< hpend
; hp
++)
2148 register struct xcoff_link_hash_entry
*h
;
2152 && (h
->flags
& XCOFF_MARK
) == 0)
2154 if (! xcoff_mark_symbol (info
, h
))
2159 /* Look through the section relocs. */
2161 if ((sec
->flags
& SEC_RELOC
) != 0
2162 && sec
->reloc_count
> 0)
2164 rel
= xcoff_read_internal_relocs (sec
->owner
, sec
, true,
2165 (bfd_byte
*) NULL
, false,
2166 (struct internal_reloc
*) NULL
);
2169 relend
= rel
+ sec
->reloc_count
;
2170 for (; rel
< relend
; rel
++)
2173 struct xcoff_link_hash_entry
*h
;
2175 if ((unsigned int) rel
->r_symndx
2176 > obj_raw_syment_count (sec
->owner
))
2179 h
= obj_xcoff_sym_hashes (sec
->owner
)[rel
->r_symndx
];
2181 && (h
->flags
& XCOFF_MARK
) == 0)
2183 if (! xcoff_mark_symbol (info
, h
))
2187 rsec
= xcoff_data (sec
->owner
)->csects
[rel
->r_symndx
];
2189 && (rsec
->flags
& SEC_MARK
) == 0)
2191 if (! xcoff_mark (info
, rsec
))
2195 /* See if this reloc needs to be copied into the .loader
2197 switch (rel
->r_type
)
2201 || h
->root
.type
== bfd_link_hash_defined
2202 || h
->root
.type
== bfd_link_hash_defweak
2203 || h
->root
.type
== bfd_link_hash_common
2204 || ((h
->flags
& XCOFF_CALLED
) != 0
2205 && (h
->root
.type
== bfd_link_hash_undefined
2206 || h
->root
.type
== bfd_link_hash_undefweak
)
2207 && h
->root
.root
.string
[0] == '.'
2208 && h
->descriptor
!= NULL
2209 && ((h
->descriptor
->flags
& XCOFF_DEF_DYNAMIC
) != 0
2217 ++xcoff_hash_table (info
)->ldrel_count
;
2219 h
->flags
|= XCOFF_LDREL
;
2226 /* We should never need a .loader reloc for a TOC
2232 if (! info
->keep_memory
2233 && coff_section_data (sec
->owner
, sec
) != NULL
2234 && coff_section_data (sec
->owner
, sec
)->relocs
!= NULL
2235 && ! coff_section_data (sec
->owner
, sec
)->keep_relocs
)
2237 free (coff_section_data (sec
->owner
, sec
)->relocs
);
2238 coff_section_data (sec
->owner
, sec
)->relocs
= NULL
;
2246 /* The sweep phase of garbage collection. Remove all garbage
2251 struct bfd_link_info
*info
;
2255 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
2259 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
2261 if ((o
->flags
& SEC_MARK
) == 0)
2263 /* Keep all sections from non-XCOFF input files. Keep
2264 special sections. Keep .debug sections for the
2266 if (sub
->xvec
!= info
->hash
->creator
2267 || o
== xcoff_hash_table (info
)->debug_section
2268 || o
== xcoff_hash_table (info
)->loader_section
2269 || o
== xcoff_hash_table (info
)->linkage_section
2270 || o
== xcoff_hash_table (info
)->toc_section
2271 || o
== xcoff_hash_table (info
)->descriptor_section
2272 || strcmp (o
->name
, ".debug") == 0)
2273 o
->flags
|= SEC_MARK
;
2278 o
->lineno_count
= 0;
2285 /* Record the number of elements in a set. This is used to output the
2286 correct csect length. */
2289 bfd_xcoff_link_record_set (output_bfd
, info
, harg
, size
)
2291 struct bfd_link_info
*info
;
2292 struct bfd_link_hash_entry
*harg
;
2295 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
2296 struct xcoff_link_size_list
*n
;
2298 if (! XCOFF_XVECP (output_bfd
->xvec
))
2301 /* This will hardly ever be called. I don't want to burn four bytes
2302 per global symbol, so instead the size is kept on a linked list
2303 attached to the hash table. */
2305 n
= ((struct xcoff_link_size_list
*)
2306 bfd_alloc (output_bfd
, sizeof (struct xcoff_link_size_list
)));
2309 n
->next
= xcoff_hash_table (info
)->size_list
;
2312 xcoff_hash_table (info
)->size_list
= n
;
2314 h
->flags
|= XCOFF_HAS_SIZE
;
2319 /* Import a symbol. */
2322 bfd_xcoff_import_symbol (output_bfd
, info
, harg
, val
, imppath
, impfile
,
2325 struct bfd_link_info
*info
;
2326 struct bfd_link_hash_entry
*harg
;
2328 const char *imppath
;
2329 const char *impfile
;
2330 const char *impmember
;
2332 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
2334 if (! XCOFF_XVECP (output_bfd
->xvec
))
2337 h
->flags
|= XCOFF_IMPORT
;
2339 if (val
!= (bfd_vma
) -1)
2341 if (h
->root
.type
== bfd_link_hash_defined
2342 && (! bfd_is_abs_section (h
->root
.u
.def
.section
)
2343 || h
->root
.u
.def
.value
!= val
))
2345 if (! ((*info
->callbacks
->multiple_definition
)
2346 (info
, h
->root
.root
.string
, h
->root
.u
.def
.section
->owner
,
2347 h
->root
.u
.def
.section
, h
->root
.u
.def
.value
,
2348 output_bfd
, bfd_abs_section_ptr
, val
)))
2352 h
->root
.type
= bfd_link_hash_defined
;
2353 h
->root
.u
.def
.section
= bfd_abs_section_ptr
;
2354 h
->root
.u
.def
.value
= val
;
2357 if (h
->ldsym
== NULL
)
2359 h
->ldsym
= ((struct internal_ldsym
*)
2360 bfd_zalloc (output_bfd
, sizeof (struct internal_ldsym
)));
2361 if (h
->ldsym
== NULL
)
2365 if (imppath
== NULL
)
2366 h
->ldsym
->l_ifile
= (bfd_size_type
) -1;
2370 struct xcoff_import_file
**pp
;
2372 /* We start c at 1 because the first entry in the import list is
2373 reserved for the library search path. */
2374 for (pp
= &xcoff_hash_table (info
)->imports
, c
= 1;
2376 pp
= &(*pp
)->next
, ++c
)
2378 if (strcmp ((*pp
)->path
, imppath
) == 0
2379 && strcmp ((*pp
)->file
, impfile
) == 0
2380 && strcmp ((*pp
)->member
, impmember
) == 0)
2386 struct xcoff_import_file
*n
;
2388 n
= ((struct xcoff_import_file
*)
2389 bfd_alloc (output_bfd
, sizeof (struct xcoff_import_file
)));
2395 n
->member
= impmember
;
2399 h
->ldsym
->l_ifile
= c
;
2405 /* Export a symbol. */
2408 bfd_xcoff_export_symbol (output_bfd
, info
, harg
, syscall
)
2410 struct bfd_link_info
*info
;
2411 struct bfd_link_hash_entry
*harg
;
2414 struct xcoff_link_hash_entry
*h
= (struct xcoff_link_hash_entry
*) harg
;
2416 if (! XCOFF_XVECP (output_bfd
->xvec
))
2419 h
->flags
|= XCOFF_EXPORT
;
2421 /* FIXME: I'm not at all sure what syscall is supposed to mean, so
2422 I'm just going to ignore it until somebody explains it. */
2424 /* See if this is a function descriptor. It may be one even though
2425 it is not so marked. */
2426 if ((h
->flags
& XCOFF_DESCRIPTOR
) == 0
2427 && h
->root
.root
.string
[0] != '.')
2430 struct xcoff_link_hash_entry
*hfn
;
2432 fnname
= (char *) bfd_malloc (strlen (h
->root
.root
.string
) + 2);
2436 strcpy (fnname
+ 1, h
->root
.root
.string
);
2437 hfn
= xcoff_link_hash_lookup (xcoff_hash_table (info
),
2438 fnname
, false, false, true);
2441 && hfn
->smclas
== XMC_PR
2442 && (hfn
->root
.type
== bfd_link_hash_defined
2443 || hfn
->root
.type
== bfd_link_hash_defweak
))
2445 h
->flags
|= XCOFF_DESCRIPTOR
;
2446 h
->descriptor
= hfn
;
2447 hfn
->descriptor
= h
;
2451 /* Make sure we don't garbage collect this symbol. */
2452 if (! xcoff_mark_symbol (info
, h
))
2455 /* If this is a function descriptor, make sure we don't garbage
2456 collect the associated function code. We normally don't have to
2457 worry about this, because the descriptor will be attached to a
2458 section with relocs, but if we are creating the descriptor
2459 ourselves those relocs will not be visible to the mark code. */
2460 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0)
2462 if (! xcoff_mark_symbol (info
, h
->descriptor
))
2469 /* Count a reloc against a symbol. This is called for relocs
2470 generated by the linker script, typically for global constructors
2474 bfd_xcoff_link_count_reloc (output_bfd
, info
, name
)
2476 struct bfd_link_info
*info
;
2479 struct xcoff_link_hash_entry
*h
;
2481 if (! XCOFF_XVECP (output_bfd
->xvec
))
2484 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
), name
, false, false,
2488 (*_bfd_error_handler
) ("%s: no such symbol", name
);
2489 bfd_set_error (bfd_error_no_symbols
);
2493 h
->flags
|= XCOFF_REF_REGULAR
| XCOFF_LDREL
;
2494 ++xcoff_hash_table (info
)->ldrel_count
;
2496 /* Mark the symbol to avoid garbage collection. */
2497 if (! xcoff_mark_symbol (info
, h
))
2503 /* This function is called for each symbol to which the linker script
2507 bfd_xcoff_record_link_assignment (output_bfd
, info
, name
)
2509 struct bfd_link_info
*info
;
2512 struct xcoff_link_hash_entry
*h
;
2514 if (! XCOFF_XVECP (output_bfd
->xvec
))
2517 h
= xcoff_link_hash_lookup (xcoff_hash_table (info
), name
, true, true,
2522 h
->flags
|= XCOFF_DEF_REGULAR
;
2527 /* This structure is used to pass information through
2528 xcoff_link_hash_traverse. */
2530 struct xcoff_loader_info
2532 /* Set if a problem occurred. */
2536 /* Link information structure. */
2537 struct bfd_link_info
*info
;
2538 /* Number of ldsym structures. */
2540 /* Size of string table. */
2544 /* Allocated size of string table. */
2548 /* Build the .loader section. This is called by the XCOFF linker
2549 emulation before_allocation routine. We must set the size of the
2550 .loader section before the linker lays out the output file.
2551 LIBPATH is the library path to search for shared objects; this is
2552 normally built from the -L arguments passed to the linker. ENTRY
2553 is the name of the entry point symbol. */
2556 bfd_xcoff_size_dynamic_sections (output_bfd
, info
, libpath
, entry
,
2557 file_align
, maxstack
, maxdata
, gc
,
2558 modtype
, textro
, special_sections
)
2560 struct bfd_link_info
*info
;
2561 const char *libpath
;
2563 unsigned long file_align
;
2564 unsigned long maxstack
;
2565 unsigned long maxdata
;
2569 asection
**special_sections
;
2571 struct xcoff_link_hash_entry
*hentry
;
2573 struct xcoff_loader_info ldinfo
;
2575 size_t impsize
, impcount
;
2576 struct xcoff_import_file
*fl
;
2577 struct internal_ldhdr
*ldhdr
;
2578 bfd_size_type stoff
;
2582 struct bfd_strtab_hash
*debug_strtab
;
2583 bfd_byte
*debug_contents
= NULL
;
2585 if (! XCOFF_XVECP (output_bfd
->xvec
))
2587 for (i
= 0; i
< 6; i
++)
2588 special_sections
[i
] = NULL
;
2592 ldinfo
.failed
= false;
2593 ldinfo
.output_bfd
= output_bfd
;
2595 ldinfo
.ldsym_count
= 0;
2596 ldinfo
.string_size
= 0;
2597 ldinfo
.strings
= NULL
;
2598 ldinfo
.string_alc
= 0;
2600 xcoff_data (output_bfd
)->maxstack
= maxstack
;
2601 xcoff_data (output_bfd
)->maxdata
= maxdata
;
2602 xcoff_data (output_bfd
)->modtype
= modtype
;
2604 xcoff_hash_table (info
)->file_align
= file_align
;
2605 xcoff_hash_table (info
)->textro
= textro
;
2607 hentry
= xcoff_link_hash_lookup (xcoff_hash_table (info
), entry
,
2608 false, false, true);
2611 hentry
->flags
|= XCOFF_ENTRY
;
2612 if (hentry
->root
.type
== bfd_link_hash_defined
2613 || hentry
->root
.type
== bfd_link_hash_defweak
)
2614 xcoff_data (output_bfd
)->entry_section
=
2615 hentry
->root
.u
.def
.section
->output_section
;
2618 /* Garbage collect unused sections. */
2619 if (info
->relocateable
2622 || (hentry
->root
.type
!= bfd_link_hash_defined
2623 && hentry
->root
.type
!= bfd_link_hash_defweak
))
2626 xcoff_hash_table (info
)->gc
= false;
2628 /* We still need to call xcoff_mark, in order to set ldrel_count
2630 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
2634 for (o
= sub
->sections
; o
!= NULL
; o
= o
->next
)
2636 if ((o
->flags
& SEC_MARK
) == 0)
2638 if (! xcoff_mark (info
, o
))
2646 if (! xcoff_mark (info
, hentry
->root
.u
.def
.section
))
2649 xcoff_hash_table (info
)->gc
= true;
2652 /* Return special sections to the caller. */
2653 for (i
= 0; i
< 6; i
++)
2657 sec
= xcoff_hash_table (info
)->special_sections
[i
];
2660 && (sec
->flags
& SEC_MARK
) == 0)
2662 special_sections
[i
] = sec
;
2665 if (info
->input_bfds
== NULL
)
2667 /* I'm not sure what to do in this bizarre case. */
2671 xcoff_link_hash_traverse (xcoff_hash_table (info
), xcoff_build_ldsyms
,
2676 /* Work out the size of the import file names. Each import file ID
2677 consists of three null terminated strings: the path, the file
2678 name, and the archive member name. The first entry in the list
2679 of names is the path to use to find objects, which the linker has
2680 passed in as the libpath argument. For some reason, the path
2681 entry in the other import file names appears to always be empty. */
2682 impsize
= strlen (libpath
) + 3;
2684 for (fl
= xcoff_hash_table (info
)->imports
; fl
!= NULL
; fl
= fl
->next
)
2687 impsize
+= (strlen (fl
->path
)
2689 + strlen (fl
->member
)
2693 /* Set up the .loader section header. */
2694 ldhdr
= &xcoff_hash_table (info
)->ldhdr
;
2695 ldhdr
->l_version
= 1;
2696 ldhdr
->l_nsyms
= ldinfo
.ldsym_count
;
2697 ldhdr
->l_nreloc
= xcoff_hash_table (info
)->ldrel_count
;
2698 ldhdr
->l_istlen
= impsize
;
2699 ldhdr
->l_nimpid
= impcount
;
2700 ldhdr
->l_impoff
= (LDHDRSZ
2701 + ldhdr
->l_nsyms
* LDSYMSZ
2702 + ldhdr
->l_nreloc
* LDRELSZ
);
2703 ldhdr
->l_stlen
= ldinfo
.string_size
;
2704 stoff
= ldhdr
->l_impoff
+ impsize
;
2705 if (ldinfo
.string_size
== 0)
2708 ldhdr
->l_stoff
= stoff
;
2710 /* We now know the final size of the .loader section. Allocate
2712 lsec
= xcoff_hash_table (info
)->loader_section
;
2713 lsec
->_raw_size
= stoff
+ ldhdr
->l_stlen
;
2714 lsec
->contents
= (bfd_byte
*) bfd_zalloc (output_bfd
, lsec
->_raw_size
);
2715 if (lsec
->contents
== NULL
)
2718 /* Set up the header. */
2719 xcoff_swap_ldhdr_out (output_bfd
, ldhdr
,
2720 (struct external_ldhdr
*) lsec
->contents
);
2722 /* Set up the import file names. */
2723 out
= (char *) lsec
->contents
+ ldhdr
->l_impoff
;
2724 strcpy (out
, libpath
);
2725 out
+= strlen (libpath
) + 1;
2728 for (fl
= xcoff_hash_table (info
)->imports
; fl
!= NULL
; fl
= fl
->next
)
2730 register const char *s
;
2733 while ((*out
++ = *s
++) != '\0')
2736 while ((*out
++ = *s
++) != '\0')
2739 while ((*out
++ = *s
++) != '\0')
2743 BFD_ASSERT ((bfd_size_type
) ((bfd_byte
*) out
- lsec
->contents
) == stoff
);
2745 /* Set up the symbol string table. */
2746 if (ldinfo
.string_size
> 0)
2748 memcpy (out
, ldinfo
.strings
, ldinfo
.string_size
);
2749 free (ldinfo
.strings
);
2750 ldinfo
.strings
= NULL
;
2753 /* We can't set up the symbol table or the relocs yet, because we
2754 don't yet know the final position of the various sections. The
2755 .loader symbols are written out when the corresponding normal
2756 symbols are written out in xcoff_link_input_bfd or
2757 xcoff_write_global_symbol. The .loader relocs are written out
2758 when the corresponding normal relocs are handled in
2759 xcoff_link_input_bfd. */
2761 /* Allocate space for the magic sections. */
2762 sec
= xcoff_hash_table (info
)->linkage_section
;
2763 if (sec
->_raw_size
> 0)
2765 sec
->contents
= (bfd_byte
*) bfd_zalloc (output_bfd
, sec
->_raw_size
);
2766 if (sec
->contents
== NULL
)
2769 sec
= xcoff_hash_table (info
)->toc_section
;
2770 if (sec
->_raw_size
> 0)
2772 sec
->contents
= (bfd_byte
*) bfd_zalloc (output_bfd
, sec
->_raw_size
);
2773 if (sec
->contents
== NULL
)
2776 sec
= xcoff_hash_table (info
)->descriptor_section
;
2777 if (sec
->_raw_size
> 0)
2779 sec
->contents
= (bfd_byte
*) bfd_zalloc (output_bfd
, sec
->_raw_size
);
2780 if (sec
->contents
== NULL
)
2784 /* Now that we've done garbage collection, figure out the contents
2785 of the .debug section. */
2786 debug_strtab
= xcoff_hash_table (info
)->debug_strtab
;
2788 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
2791 bfd_size_type symcount
;
2792 unsigned long *debug_index
;
2794 bfd_byte
*esym
, *esymend
;
2795 bfd_size_type symesz
;
2797 if (sub
->xvec
!= info
->hash
->creator
)
2799 subdeb
= bfd_get_section_by_name (sub
, ".debug");
2800 if (subdeb
== NULL
|| subdeb
->_raw_size
== 0)
2803 if (info
->strip
== strip_all
2804 || info
->strip
== strip_debugger
2805 || info
->discard
== discard_all
)
2807 subdeb
->_raw_size
= 0;
2811 if (! _bfd_coff_get_external_symbols (sub
))
2814 symcount
= obj_raw_syment_count (sub
);
2815 debug_index
= ((unsigned long *)
2816 bfd_zalloc (sub
, symcount
* sizeof (unsigned long)));
2817 if (debug_index
== NULL
)
2819 xcoff_data (sub
)->debug_indices
= debug_index
;
2821 /* Grab the contents of the .debug section. We use malloc and
2822 copy the neams into the debug stringtab, rather than
2823 bfd_alloc, because I expect that, when linking many files
2824 together, many of the strings will be the same. Storing the
2825 strings in the hash table should save space in this case. */
2826 debug_contents
= (bfd_byte
*) bfd_malloc (subdeb
->_raw_size
);
2827 if (debug_contents
== NULL
)
2829 if (! bfd_get_section_contents (sub
, subdeb
, (PTR
) debug_contents
,
2830 (file_ptr
) 0, subdeb
->_raw_size
))
2833 csectpp
= xcoff_data (sub
)->csects
;
2835 symesz
= bfd_coff_symesz (sub
);
2836 esym
= (bfd_byte
*) obj_coff_external_syms (sub
);
2837 esymend
= esym
+ symcount
* symesz
;
2838 while (esym
< esymend
)
2840 struct internal_syment sym
;
2842 bfd_coff_swap_sym_in (sub
, (PTR
) esym
, (PTR
) &sym
);
2844 *debug_index
= (unsigned long) -1;
2846 if (sym
._n
._n_n
._n_zeroes
== 0
2849 || ((*csectpp
)->flags
& SEC_MARK
) != 0
2850 || *csectpp
== bfd_abs_section_ptr
)
2851 && bfd_coff_symname_in_debug (sub
, &sym
))
2856 name
= (char *) debug_contents
+ sym
._n
._n_n
._n_offset
;
2857 indx
= _bfd_stringtab_add (debug_strtab
, name
, true, true);
2858 if (indx
== (bfd_size_type
) -1)
2860 *debug_index
= indx
;
2863 esym
+= (sym
.n_numaux
+ 1) * symesz
;
2864 csectpp
+= sym
.n_numaux
+ 1;
2865 debug_index
+= sym
.n_numaux
+ 1;
2868 free (debug_contents
);
2869 debug_contents
= NULL
;
2871 /* Clear the size of subdeb, so that it is not included directly
2872 in the output file. */
2873 subdeb
->_raw_size
= 0;
2875 if (! info
->keep_memory
)
2877 if (! _bfd_coff_free_symbols (sub
))
2882 xcoff_hash_table (info
)->debug_section
->_raw_size
=
2883 _bfd_stringtab_size (debug_strtab
);
2888 if (ldinfo
.strings
!= NULL
)
2889 free (ldinfo
.strings
);
2890 if (debug_contents
!= NULL
)
2891 free (debug_contents
);
2895 /* Add a symbol to the .loader symbols, if necessary. */
2898 xcoff_build_ldsyms (h
, p
)
2899 struct xcoff_link_hash_entry
*h
;
2902 struct xcoff_loader_info
*ldinfo
= (struct xcoff_loader_info
*) p
;
2905 /* We don't want to garbage collect symbols which are not defined in
2906 XCOFF files. This is a convenient place to mark them. */
2907 if (xcoff_hash_table (ldinfo
->info
)->gc
2908 && (h
->flags
& XCOFF_MARK
) == 0
2909 && (h
->root
.type
== bfd_link_hash_defined
2910 || h
->root
.type
== bfd_link_hash_defweak
)
2911 && (h
->root
.u
.def
.section
->owner
== NULL
2912 || (h
->root
.u
.def
.section
->owner
->xvec
2913 != ldinfo
->info
->hash
->creator
)))
2914 h
->flags
|= XCOFF_MARK
;
2916 /* If this symbol is called and defined in a dynamic object, or not
2917 defined at all when building a shared object, then we need to set
2918 up global linkage code for it. (Unless we did garbage collection
2919 and we didn't need this symbol.) */
2920 if ((h
->flags
& XCOFF_CALLED
) != 0
2921 && (h
->root
.type
== bfd_link_hash_undefined
2922 || h
->root
.type
== bfd_link_hash_undefweak
)
2923 && h
->root
.root
.string
[0] == '.'
2924 && h
->descriptor
!= NULL
2925 && ((h
->descriptor
->flags
& XCOFF_DEF_DYNAMIC
) != 0
2926 || ldinfo
->info
->shared
)
2927 && (! xcoff_hash_table (ldinfo
->info
)->gc
2928 || (h
->flags
& XCOFF_MARK
) != 0))
2931 struct xcoff_link_hash_entry
*hds
;
2933 sec
= xcoff_hash_table (ldinfo
->info
)->linkage_section
;
2934 h
->root
.type
= bfd_link_hash_defined
;
2935 h
->root
.u
.def
.section
= sec
;
2936 h
->root
.u
.def
.value
= sec
->_raw_size
;
2938 h
->flags
|= XCOFF_DEF_REGULAR
;
2939 sec
->_raw_size
+= XCOFF_GLINK_SIZE
;
2941 /* The global linkage code requires a TOC entry for the
2943 hds
= h
->descriptor
;
2944 BFD_ASSERT ((hds
->root
.type
== bfd_link_hash_undefined
2945 || hds
->root
.type
== bfd_link_hash_undefweak
)
2946 && (hds
->flags
& XCOFF_DEF_REGULAR
) == 0);
2947 hds
->flags
|= XCOFF_MARK
;
2948 if (hds
->toc_section
== NULL
)
2950 hds
->toc_section
= xcoff_hash_table (ldinfo
->info
)->toc_section
;
2951 hds
->u
.toc_offset
= hds
->toc_section
->_raw_size
;
2952 hds
->toc_section
->_raw_size
+= 4;
2953 ++xcoff_hash_table (ldinfo
->info
)->ldrel_count
;
2954 ++hds
->toc_section
->reloc_count
;
2956 hds
->flags
|= XCOFF_SET_TOC
| XCOFF_LDREL
;
2958 /* We need to call xcoff_build_ldsyms recursively here,
2959 because we may already have passed hds on the traversal. */
2960 xcoff_build_ldsyms (hds
, p
);
2964 /* If this symbol is exported, but not defined, we need to try to
2966 if ((h
->flags
& XCOFF_EXPORT
) != 0
2967 && (h
->flags
& XCOFF_IMPORT
) == 0
2968 && (h
->flags
& XCOFF_DEF_REGULAR
) == 0
2969 && (h
->flags
& XCOFF_DEF_DYNAMIC
) == 0
2970 && (h
->root
.type
== bfd_link_hash_undefined
2971 || h
->root
.type
== bfd_link_hash_undefweak
))
2973 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0
2974 && (h
->descriptor
->root
.type
== bfd_link_hash_defined
2975 || h
->descriptor
->root
.type
== bfd_link_hash_defweak
))
2979 /* This is an undefined function descriptor associated with
2980 a defined entry point. We can build up a function
2981 descriptor ourselves. Believe it or not, the AIX linker
2982 actually does this, and there are cases where we need to
2984 sec
= xcoff_hash_table (ldinfo
->info
)->descriptor_section
;
2985 h
->root
.type
= bfd_link_hash_defined
;
2986 h
->root
.u
.def
.section
= sec
;
2987 h
->root
.u
.def
.value
= sec
->_raw_size
;
2989 h
->flags
|= XCOFF_DEF_REGULAR
;
2990 sec
->_raw_size
+= 12;
2992 /* A function descriptor uses two relocs: one for the
2993 associated code, and one for the TOC address. */
2994 xcoff_hash_table (ldinfo
->info
)->ldrel_count
+= 2;
2995 sec
->reloc_count
+= 2;
2997 /* We handle writing out the contents of the descriptor in
2998 xcoff_write_global_symbol. */
3002 (*_bfd_error_handler
)
3003 ("attempt to export undefined symbol `%s'",
3004 h
->root
.root
.string
);
3005 ldinfo
->failed
= true;
3006 bfd_set_error (bfd_error_invalid_operation
);
3011 /* If this is still a common symbol, and it wasn't garbage
3012 collected, we need to actually allocate space for it in the .bss
3014 if (h
->root
.type
== bfd_link_hash_common
3015 && (! xcoff_hash_table (ldinfo
->info
)->gc
3016 || (h
->flags
& XCOFF_MARK
) != 0)
3017 && h
->root
.u
.c
.p
->section
->_raw_size
== 0)
3019 BFD_ASSERT (bfd_is_com_section (h
->root
.u
.c
.p
->section
));
3020 h
->root
.u
.c
.p
->section
->_raw_size
= h
->root
.u
.c
.size
;
3023 /* We need to add a symbol to the .loader section if it is mentioned
3024 in a reloc which we are copying to the .loader section and it was
3025 not defined or common, or if it is the entry point, or if it is
3028 if (((h
->flags
& XCOFF_LDREL
) == 0
3029 || h
->root
.type
== bfd_link_hash_defined
3030 || h
->root
.type
== bfd_link_hash_defweak
3031 || h
->root
.type
== bfd_link_hash_common
)
3032 && (h
->flags
& XCOFF_ENTRY
) == 0
3033 && (h
->flags
& XCOFF_EXPORT
) == 0)
3039 /* We don't need to add this symbol if we did garbage collection and
3040 we did not mark this symbol. */
3041 if (xcoff_hash_table (ldinfo
->info
)->gc
3042 && (h
->flags
& XCOFF_MARK
) == 0)
3048 /* We may have already processed this symbol due to the recursive
3050 if ((h
->flags
& XCOFF_BUILT_LDSYM
) != 0)
3053 /* We need to add this symbol to the .loader symbols. */
3055 /* h->ldsym will already have been allocated for an explicitly
3057 if (h
->ldsym
== NULL
)
3059 h
->ldsym
= ((struct internal_ldsym
*)
3060 bfd_zalloc (ldinfo
->output_bfd
,
3061 sizeof (struct internal_ldsym
)));
3062 if (h
->ldsym
== NULL
)
3064 ldinfo
->failed
= true;
3069 /* The first 3 symbol table indices are reserved to indicate the
3071 h
->ldindx
= ldinfo
->ldsym_count
+ 3;
3073 ++ldinfo
->ldsym_count
;
3075 len
= strlen (h
->root
.root
.string
);
3076 if (len
<= SYMNMLEN
)
3077 strncpy (h
->ldsym
->_l
._l_name
, h
->root
.root
.string
, SYMNMLEN
);
3080 if (ldinfo
->string_size
+ len
+ 3 > ldinfo
->string_alc
)
3083 bfd_byte
*newstrings
;
3085 newalc
= ldinfo
->string_alc
* 2;
3088 while (ldinfo
->string_size
+ len
+ 3 > newalc
)
3091 newstrings
= ((bfd_byte
*)
3092 bfd_realloc ((PTR
) ldinfo
->strings
, newalc
));
3093 if (newstrings
== NULL
)
3095 ldinfo
->failed
= true;
3098 ldinfo
->string_alc
= newalc
;
3099 ldinfo
->strings
= newstrings
;
3102 bfd_put_16 (ldinfo
->output_bfd
, len
+ 1,
3103 ldinfo
->strings
+ ldinfo
->string_size
);
3104 strcpy (ldinfo
->strings
+ ldinfo
->string_size
+ 2, h
->root
.root
.string
);
3105 h
->ldsym
->_l
._l_l
._l_zeroes
= 0;
3106 h
->ldsym
->_l
._l_l
._l_offset
= ldinfo
->string_size
+ 2;
3107 ldinfo
->string_size
+= len
+ 3;
3110 h
->flags
|= XCOFF_BUILT_LDSYM
;
3115 /* Do the final link step. */
3118 _bfd_xcoff_bfd_final_link (abfd
, info
)
3120 struct bfd_link_info
*info
;
3122 bfd_size_type symesz
;
3123 struct xcoff_final_link_info finfo
;
3125 struct bfd_link_order
*p
;
3126 size_t max_contents_size
;
3127 size_t max_sym_count
;
3128 size_t max_lineno_count
;
3129 size_t max_reloc_count
;
3130 size_t max_output_reloc_count
;
3131 file_ptr rel_filepos
;
3133 file_ptr line_filepos
;
3134 unsigned int linesz
;
3136 bfd_byte
*external_relocs
= NULL
;
3137 char strbuf
[STRING_SIZE_SIZE
];
3140 abfd
->flags
|= DYNAMIC
;
3142 symesz
= bfd_coff_symesz (abfd
);
3145 finfo
.output_bfd
= abfd
;
3146 finfo
.strtab
= NULL
;
3147 finfo
.section_info
= NULL
;
3148 finfo
.last_file_index
= -1;
3149 finfo
.toc_symindx
= -1;
3150 finfo
.internal_syms
= NULL
;
3151 finfo
.sym_indices
= NULL
;
3152 finfo
.outsyms
= NULL
;
3153 finfo
.linenos
= NULL
;
3154 finfo
.contents
= NULL
;
3155 finfo
.external_relocs
= NULL
;
3157 finfo
.ldsym
= ((struct external_ldsym
*)
3158 (xcoff_hash_table (info
)->loader_section
->contents
3160 finfo
.ldrel
= ((struct external_ldrel
*)
3161 (xcoff_hash_table (info
)->loader_section
->contents
3163 + xcoff_hash_table (info
)->ldhdr
.l_nsyms
* LDSYMSZ
));
3165 xcoff_data (abfd
)->coff
.link_info
= info
;
3167 finfo
.strtab
= _bfd_stringtab_init ();
3168 if (finfo
.strtab
== NULL
)
3171 /* Count the line number and relocation entries required for the
3172 output file. Determine a few maximum sizes. */
3173 max_contents_size
= 0;
3174 max_lineno_count
= 0;
3175 max_reloc_count
= 0;
3176 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3179 o
->lineno_count
= 0;
3180 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
3182 if (p
->type
== bfd_indirect_link_order
)
3186 sec
= p
->u
.indirect
.section
;
3188 if (info
->strip
== strip_none
3189 || info
->strip
== strip_some
)
3190 o
->lineno_count
+= sec
->lineno_count
;
3192 o
->reloc_count
+= sec
->reloc_count
;
3194 if (sec
->_raw_size
> max_contents_size
)
3195 max_contents_size
= sec
->_raw_size
;
3196 if (sec
->lineno_count
> max_lineno_count
)
3197 max_lineno_count
= sec
->lineno_count
;
3198 if (coff_section_data (sec
->owner
, sec
) != NULL
3199 && xcoff_section_data (sec
->owner
, sec
) != NULL
3200 && (xcoff_section_data (sec
->owner
, sec
)->lineno_count
3201 > max_lineno_count
))
3203 xcoff_section_data (sec
->owner
, sec
)->lineno_count
;
3204 if (sec
->reloc_count
> max_reloc_count
)
3205 max_reloc_count
= sec
->reloc_count
;
3207 else if (p
->type
== bfd_section_reloc_link_order
3208 || p
->type
== bfd_symbol_reloc_link_order
)
3213 /* Compute the file positions for all the sections. */
3214 if (abfd
->output_has_begun
)
3216 if (xcoff_hash_table (info
)->file_align
!= 0)
3223 file_align
= xcoff_hash_table (info
)->file_align
;
3224 if (file_align
!= 0)
3226 boolean saw_contents
;
3231 /* Insert .pad sections before every section which has
3232 contents and is loaded, if it is preceded by some other
3233 section which has contents and is loaded. */
3234 saw_contents
= true;
3235 for (op
= &abfd
->sections
; *op
!= NULL
; op
= &(*op
)->next
)
3237 (*op
)->target_index
= indx
;
3238 if (strcmp ((*op
)->name
, ".pad") == 0)
3239 saw_contents
= false;
3240 else if (((*op
)->flags
& SEC_HAS_CONTENTS
) != 0
3241 && ((*op
)->flags
& SEC_LOAD
) != 0)
3244 saw_contents
= true;
3251 n
= bfd_make_section_anyway (abfd
, ".pad");
3252 BFD_ASSERT (*op
== n
);
3254 n
->flags
= SEC_HAS_CONTENTS
;
3255 n
->alignment_power
= 0;
3256 saw_contents
= false;
3261 /* Reset the section indices after inserting the new
3264 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3267 o
->target_index
= indx
;
3269 BFD_ASSERT ((unsigned int) indx
== abfd
->section_count
);
3271 /* Work out appropriate sizes for the .pad sections to force
3272 each section to land on a page boundary. This bit of
3273 code knows what compute_section_file_positions is going
3275 sofar
= bfd_coff_filhsz (abfd
);
3276 sofar
+= bfd_coff_aoutsz (abfd
);
3277 sofar
+= abfd
->section_count
* bfd_coff_scnhsz (abfd
);
3278 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3279 if (o
->reloc_count
>= 0xffff || o
->lineno_count
>= 0xffff)
3280 sofar
+= bfd_coff_scnhsz (abfd
);
3282 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3284 if (strcmp (o
->name
, ".pad") == 0)
3288 BFD_ASSERT (o
->_raw_size
== 0);
3289 pageoff
= sofar
& (file_align
- 1);
3292 o
->_raw_size
= file_align
- pageoff
;
3293 sofar
+= file_align
- pageoff
;
3294 o
->flags
|= SEC_HAS_CONTENTS
;
3299 if ((o
->flags
& SEC_HAS_CONTENTS
) != 0)
3300 sofar
+= BFD_ALIGN (o
->_raw_size
,
3301 1 << o
->alignment_power
);
3306 bfd_coff_compute_section_file_positions (abfd
);
3309 /* Allocate space for the pointers we need to keep for the relocs. */
3313 /* We use section_count + 1, rather than section_count, because
3314 the target_index fields are 1 based. */
3315 finfo
.section_info
=
3316 ((struct xcoff_link_section_info
*)
3317 bfd_malloc ((abfd
->section_count
+ 1)
3318 * sizeof (struct xcoff_link_section_info
)));
3319 if (finfo
.section_info
== NULL
)
3321 for (i
= 0; i
<= abfd
->section_count
; i
++)
3323 finfo
.section_info
[i
].relocs
= NULL
;
3324 finfo
.section_info
[i
].rel_hashes
= NULL
;
3325 finfo
.section_info
[i
].toc_rel_hashes
= NULL
;
3329 /* Set the file positions for the relocs. */
3330 rel_filepos
= obj_relocbase (abfd
);
3331 relsz
= bfd_coff_relsz (abfd
);
3332 max_output_reloc_count
= 0;
3333 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3335 if (o
->reloc_count
== 0)
3339 o
->flags
|= SEC_RELOC
;
3340 o
->rel_filepos
= rel_filepos
;
3341 rel_filepos
+= o
->reloc_count
* relsz
;
3343 /* We don't know the indices of global symbols until we have
3344 written out all the local symbols. For each section in
3345 the output file, we keep an array of pointers to hash
3346 table entries. Each entry in the array corresponds to a
3347 reloc. When we find a reloc against a global symbol, we
3348 set the corresponding entry in this array so that we can
3349 fix up the symbol index after we have written out all the
3352 Because of this problem, we also keep the relocs in
3353 memory until the end of the link. This wastes memory.
3354 We could backpatch the file later, I suppose, although it
3356 finfo
.section_info
[o
->target_index
].relocs
=
3357 ((struct internal_reloc
*)
3358 bfd_malloc (o
->reloc_count
* sizeof (struct internal_reloc
)));
3359 finfo
.section_info
[o
->target_index
].rel_hashes
=
3360 ((struct xcoff_link_hash_entry
**)
3361 bfd_malloc (o
->reloc_count
3362 * sizeof (struct xcoff_link_hash_entry
*)));
3363 if (finfo
.section_info
[o
->target_index
].relocs
== NULL
3364 || finfo
.section_info
[o
->target_index
].rel_hashes
== NULL
)
3367 if (o
->reloc_count
> max_output_reloc_count
)
3368 max_output_reloc_count
= o
->reloc_count
;
3372 /* We now know the size of the relocs, so we can determine the file
3373 positions of the line numbers. */
3374 line_filepos
= rel_filepos
;
3375 finfo
.line_filepos
= line_filepos
;
3376 linesz
= bfd_coff_linesz (abfd
);
3377 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3379 if (o
->lineno_count
== 0)
3380 o
->line_filepos
= 0;
3383 o
->line_filepos
= line_filepos
;
3384 line_filepos
+= o
->lineno_count
* linesz
;
3387 /* Reset the reloc and lineno counts, so that we can use them to
3388 count the number of entries we have output so far. */
3390 o
->lineno_count
= 0;
3393 obj_sym_filepos (abfd
) = line_filepos
;
3395 /* Figure out the largest number of symbols in an input BFD. Take
3396 the opportunity to clear the output_has_begun fields of all the
3397 input BFD's. We want at least 4 symbols, since that is the
3398 number which xcoff_write_global_symbol may need. */
3400 for (sub
= info
->input_bfds
; sub
!= NULL
; sub
= sub
->link_next
)
3404 sub
->output_has_begun
= false;
3405 sz
= obj_raw_syment_count (sub
);
3406 if (sz
> max_sym_count
)
3410 /* Allocate some buffers used while linking. */
3411 finfo
.internal_syms
= ((struct internal_syment
*)
3412 bfd_malloc (max_sym_count
3413 * sizeof (struct internal_syment
)));
3414 finfo
.sym_indices
= (long *) bfd_malloc (max_sym_count
* sizeof (long));
3415 finfo
.outsyms
= ((bfd_byte
*)
3416 bfd_malloc ((size_t) ((max_sym_count
+ 1) * symesz
)));
3417 finfo
.linenos
= (bfd_byte
*) bfd_malloc (max_lineno_count
3418 * bfd_coff_linesz (abfd
));
3419 finfo
.contents
= (bfd_byte
*) bfd_malloc (max_contents_size
);
3420 finfo
.external_relocs
= (bfd_byte
*) bfd_malloc (max_reloc_count
* relsz
);
3421 if ((finfo
.internal_syms
== NULL
&& max_sym_count
> 0)
3422 || (finfo
.sym_indices
== NULL
&& max_sym_count
> 0)
3423 || finfo
.outsyms
== NULL
3424 || (finfo
.linenos
== NULL
&& max_lineno_count
> 0)
3425 || (finfo
.contents
== NULL
&& max_contents_size
> 0)
3426 || (finfo
.external_relocs
== NULL
&& max_reloc_count
> 0))
3429 obj_raw_syment_count (abfd
) = 0;
3430 xcoff_data (abfd
)->toc
= (bfd_vma
) -1;
3432 /* We now know the position of everything in the file, except that
3433 we don't know the size of the symbol table and therefore we don't
3434 know where the string table starts. We just build the string
3435 table in memory as we go along. We process all the relocations
3436 for a single input file at once. */
3437 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3439 for (p
= o
->link_order_head
; p
!= NULL
; p
= p
->next
)
3441 if (p
->type
== bfd_indirect_link_order
3442 && p
->u
.indirect
.section
->owner
->xvec
== abfd
->xvec
)
3444 sub
= p
->u
.indirect
.section
->owner
;
3445 if (! sub
->output_has_begun
)
3447 if (! xcoff_link_input_bfd (&finfo
, sub
))
3449 sub
->output_has_begun
= true;
3452 else if (p
->type
== bfd_section_reloc_link_order
3453 || p
->type
== bfd_symbol_reloc_link_order
)
3455 if (! xcoff_reloc_link_order (abfd
, &finfo
, o
, p
))
3460 if (! _bfd_default_link_order (abfd
, info
, o
, p
))
3466 /* Free up the buffers used by xcoff_link_input_bfd. */
3468 if (finfo
.internal_syms
!= NULL
)
3470 free (finfo
.internal_syms
);
3471 finfo
.internal_syms
= NULL
;
3473 if (finfo
.sym_indices
!= NULL
)
3475 free (finfo
.sym_indices
);
3476 finfo
.sym_indices
= NULL
;
3478 if (finfo
.linenos
!= NULL
)
3480 free (finfo
.linenos
);
3481 finfo
.linenos
= NULL
;
3483 if (finfo
.contents
!= NULL
)
3485 free (finfo
.contents
);
3486 finfo
.contents
= NULL
;
3488 if (finfo
.external_relocs
!= NULL
)
3490 free (finfo
.external_relocs
);
3491 finfo
.external_relocs
= NULL
;
3494 /* The value of the last C_FILE symbol is supposed to be -1. Write
3496 if (finfo
.last_file_index
!= -1)
3498 finfo
.last_file
.n_value
= -1;
3499 bfd_coff_swap_sym_out (abfd
, (PTR
) &finfo
.last_file
,
3500 (PTR
) finfo
.outsyms
);
3502 (obj_sym_filepos (abfd
)
3503 + finfo
.last_file_index
* symesz
),
3505 || bfd_write (finfo
.outsyms
, symesz
, 1, abfd
) != symesz
)
3509 /* Write out all the global symbols which do not come from XCOFF
3511 xcoff_link_hash_traverse (xcoff_hash_table (info
),
3512 xcoff_write_global_symbol
,
3515 if (finfo
.outsyms
!= NULL
)
3517 free (finfo
.outsyms
);
3518 finfo
.outsyms
= NULL
;
3521 /* Now that we have written out all the global symbols, we know the
3522 symbol indices to use for relocs against them, and we can finally
3523 write out the relocs. */
3524 external_relocs
= (bfd_byte
*) malloc (max_output_reloc_count
* relsz
);
3525 if (external_relocs
== NULL
&& max_output_reloc_count
!= 0)
3527 bfd_set_error (bfd_error_no_memory
);
3531 for (o
= abfd
->sections
; o
!= NULL
; o
= o
->next
)
3533 struct internal_reloc
*irel
;
3534 struct internal_reloc
*irelend
;
3535 struct xcoff_link_hash_entry
**rel_hash
;
3536 struct xcoff_toc_rel_hash
*toc_rel_hash
;
3539 if (o
->reloc_count
== 0)
3542 irel
= finfo
.section_info
[o
->target_index
].relocs
;
3543 irelend
= irel
+ o
->reloc_count
;
3544 rel_hash
= finfo
.section_info
[o
->target_index
].rel_hashes
;
3545 for (; irel
< irelend
; irel
++, rel_hash
++, erel
+= relsz
)
3547 if (*rel_hash
!= NULL
)
3549 if ((*rel_hash
)->indx
< 0)
3551 if (! ((*info
->callbacks
->unattached_reloc
)
3552 (info
, (*rel_hash
)->root
.root
.string
,
3553 (bfd
*) NULL
, o
, irel
->r_vaddr
)))
3555 (*rel_hash
)->indx
= 0;
3557 irel
->r_symndx
= (*rel_hash
)->indx
;
3561 for (toc_rel_hash
= finfo
.section_info
[o
->target_index
].toc_rel_hashes
;
3562 toc_rel_hash
!= NULL
;
3563 toc_rel_hash
= toc_rel_hash
->next
)
3565 if (toc_rel_hash
->h
->u
.toc_indx
< 0)
3567 if (! ((*info
->callbacks
->unattached_reloc
)
3568 (info
, toc_rel_hash
->h
->root
.root
.string
,
3569 (bfd
*) NULL
, o
, toc_rel_hash
->rel
->r_vaddr
)))
3571 toc_rel_hash
->h
->u
.toc_indx
= 0;
3573 toc_rel_hash
->rel
->r_symndx
= toc_rel_hash
->h
->u
.toc_indx
;
3576 /* XCOFF requires that the relocs be sorted by address. We tend
3577 to produce them in the order in which their containing csects
3578 appear in the symbol table, which is not necessarily by
3579 address. So we sort them here. There may be a better way to
3581 qsort ((PTR
) finfo
.section_info
[o
->target_index
].relocs
,
3582 o
->reloc_count
, sizeof (struct internal_reloc
),
3585 irel
= finfo
.section_info
[o
->target_index
].relocs
;
3586 irelend
= irel
+ o
->reloc_count
;
3587 erel
= external_relocs
;
3588 for (; irel
< irelend
; irel
++, rel_hash
++, erel
+= relsz
)
3589 bfd_coff_swap_reloc_out (abfd
, (PTR
) irel
, (PTR
) erel
);
3591 if (bfd_seek (abfd
, o
->rel_filepos
, SEEK_SET
) != 0
3592 || bfd_write ((PTR
) external_relocs
, relsz
, o
->reloc_count
,
3593 abfd
) != relsz
* o
->reloc_count
)
3597 if (external_relocs
!= NULL
)
3599 free (external_relocs
);
3600 external_relocs
= NULL
;
3603 /* Free up the section information. */
3604 if (finfo
.section_info
!= NULL
)
3608 for (i
= 0; i
< abfd
->section_count
; i
++)
3610 if (finfo
.section_info
[i
].relocs
!= NULL
)
3611 free (finfo
.section_info
[i
].relocs
);
3612 if (finfo
.section_info
[i
].rel_hashes
!= NULL
)
3613 free (finfo
.section_info
[i
].rel_hashes
);
3615 free (finfo
.section_info
);
3616 finfo
.section_info
= NULL
;
3619 /* Write out the loader section contents. */
3620 BFD_ASSERT ((bfd_byte
*) finfo
.ldrel
3621 == (xcoff_hash_table (info
)->loader_section
->contents
3622 + xcoff_hash_table (info
)->ldhdr
.l_impoff
));
3623 o
= xcoff_hash_table (info
)->loader_section
;
3624 if (! bfd_set_section_contents (abfd
, o
->output_section
,
3625 o
->contents
, o
->output_offset
,
3629 /* Write out the magic sections. */
3630 o
= xcoff_hash_table (info
)->linkage_section
;
3631 if (o
->_raw_size
> 0
3632 && ! bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
3633 o
->output_offset
, o
->_raw_size
))
3635 o
= xcoff_hash_table (info
)->toc_section
;
3636 if (o
->_raw_size
> 0
3637 && ! bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
3638 o
->output_offset
, o
->_raw_size
))
3640 o
= xcoff_hash_table (info
)->descriptor_section
;
3641 if (o
->_raw_size
> 0
3642 && ! bfd_set_section_contents (abfd
, o
->output_section
, o
->contents
,
3643 o
->output_offset
, o
->_raw_size
))
3646 /* Write out the string table. */
3648 (obj_sym_filepos (abfd
)
3649 + obj_raw_syment_count (abfd
) * symesz
),
3653 _bfd_stringtab_size (finfo
.strtab
) + STRING_SIZE_SIZE
,
3654 (bfd_byte
*) strbuf
);
3655 if (bfd_write (strbuf
, 1, STRING_SIZE_SIZE
, abfd
) != STRING_SIZE_SIZE
)
3657 if (! _bfd_stringtab_emit (abfd
, finfo
.strtab
))
3660 _bfd_stringtab_free (finfo
.strtab
);
3662 /* Write out the debugging string table. */
3663 o
= xcoff_hash_table (info
)->debug_section
;
3666 struct bfd_strtab_hash
*debug_strtab
;
3668 debug_strtab
= xcoff_hash_table (info
)->debug_strtab
;
3669 BFD_ASSERT (o
->output_section
->_raw_size
- o
->output_offset
3670 >= _bfd_stringtab_size (debug_strtab
));
3672 o
->output_section
->filepos
+ o
->output_offset
,
3675 if (! _bfd_stringtab_emit (abfd
, debug_strtab
))
3679 /* Setting bfd_get_symcount to 0 will cause write_object_contents to
3680 not try to write out the symbols. */
3681 bfd_get_symcount (abfd
) = 0;
3686 if (finfo
.strtab
!= NULL
)
3687 _bfd_stringtab_free (finfo
.strtab
);
3688 if (finfo
.section_info
!= NULL
)
3692 for (i
= 0; i
< abfd
->section_count
; i
++)
3694 if (finfo
.section_info
[i
].relocs
!= NULL
)
3695 free (finfo
.section_info
[i
].relocs
);
3696 if (finfo
.section_info
[i
].rel_hashes
!= NULL
)
3697 free (finfo
.section_info
[i
].rel_hashes
);
3699 free (finfo
.section_info
);
3701 if (finfo
.internal_syms
!= NULL
)
3702 free (finfo
.internal_syms
);
3703 if (finfo
.sym_indices
!= NULL
)
3704 free (finfo
.sym_indices
);
3705 if (finfo
.outsyms
!= NULL
)
3706 free (finfo
.outsyms
);
3707 if (finfo
.linenos
!= NULL
)
3708 free (finfo
.linenos
);
3709 if (finfo
.contents
!= NULL
)
3710 free (finfo
.contents
);
3711 if (finfo
.external_relocs
!= NULL
)
3712 free (finfo
.external_relocs
);
3713 if (external_relocs
!= NULL
)
3714 free (external_relocs
);
3718 /* Link an input file into the linker output file. This function
3719 handles all the sections and relocations of the input file at once. */
3722 xcoff_link_input_bfd (finfo
, input_bfd
)
3723 struct xcoff_final_link_info
*finfo
;
3727 const char *strings
;
3728 bfd_size_type syment_base
;
3729 unsigned int n_tmask
;
3730 unsigned int n_btshft
;
3732 bfd_size_type isymesz
;
3733 bfd_size_type osymesz
;
3734 bfd_size_type linesz
;
3737 struct xcoff_link_hash_entry
**sym_hash
;
3738 struct internal_syment
*isymp
;
3740 unsigned long *debug_index
;
3742 unsigned long output_index
;
3749 /* We can just skip DYNAMIC files, unless this is a static link. */
3750 if ((input_bfd
->flags
& DYNAMIC
) != 0
3751 && ! finfo
->info
->static_link
)
3754 /* Move all the symbols to the output file. */
3756 output_bfd
= finfo
->output_bfd
;
3758 syment_base
= obj_raw_syment_count (output_bfd
);
3759 isymesz
= bfd_coff_symesz (input_bfd
);
3760 osymesz
= bfd_coff_symesz (output_bfd
);
3761 linesz
= bfd_coff_linesz (input_bfd
);
3762 BFD_ASSERT (linesz
== bfd_coff_linesz (output_bfd
));
3764 n_tmask
= coff_data (input_bfd
)->local_n_tmask
;
3765 n_btshft
= coff_data (input_bfd
)->local_n_btshft
;
3767 /* Define macros so that ISFCN, et. al., macros work correctly. */
3768 #define N_TMASK n_tmask
3769 #define N_BTSHFT n_btshft
3772 if (! finfo
->info
->keep_memory
)
3775 if ((output_bfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
3778 if (! _bfd_coff_get_external_symbols (input_bfd
))
3781 esym
= (bfd_byte
*) obj_coff_external_syms (input_bfd
);
3782 esym_end
= esym
+ obj_raw_syment_count (input_bfd
) * isymesz
;
3783 sym_hash
= obj_xcoff_sym_hashes (input_bfd
);
3784 csectpp
= xcoff_data (input_bfd
)->csects
;
3785 debug_index
= xcoff_data (input_bfd
)->debug_indices
;
3786 isymp
= finfo
->internal_syms
;
3787 indexp
= finfo
->sym_indices
;
3788 output_index
= syment_base
;
3789 outsym
= finfo
->outsyms
;
3793 while (esym
< esym_end
)
3795 struct internal_syment isym
;
3796 union internal_auxent aux
;
3802 bfd_coff_swap_sym_in (input_bfd
, (PTR
) esym
, (PTR
) isymp
);
3804 /* If this is a C_EXT or C_HIDEXT symbol, we need the csect
3806 if (isymp
->n_sclass
== C_EXT
|| isymp
->n_sclass
== C_HIDEXT
)
3808 BFD_ASSERT (isymp
->n_numaux
> 0);
3809 bfd_coff_swap_aux_in (input_bfd
,
3810 (PTR
) (esym
+ isymesz
* isymp
->n_numaux
),
3811 isymp
->n_type
, isymp
->n_sclass
,
3812 isymp
->n_numaux
- 1, isymp
->n_numaux
,
3814 smtyp
= SMTYP_SMTYP (aux
.x_csect
.x_smtyp
);
3817 /* Make a copy of *isymp so that the relocate_section function
3818 always sees the original values. This is more reliable than
3819 always recomputing the symbol value even if we are stripping
3823 /* If this symbol is in the .loader section, swap out the
3824 .loader symbol information. If this is an external symbol
3825 reference to a defined symbol, though, then wait until we get
3826 to the definition. */
3827 if (isym
.n_sclass
== C_EXT
3828 && *sym_hash
!= NULL
3829 && (*sym_hash
)->ldsym
!= NULL
3831 || (*sym_hash
)->root
.type
== bfd_link_hash_undefined
))
3833 struct xcoff_link_hash_entry
*h
;
3834 struct internal_ldsym
*ldsym
;
3838 if (isym
.n_scnum
> 0)
3840 ldsym
->l_scnum
= (*csectpp
)->output_section
->target_index
;
3841 ldsym
->l_value
= (isym
.n_value
3842 + (*csectpp
)->output_section
->vma
3843 + (*csectpp
)->output_offset
3848 ldsym
->l_scnum
= isym
.n_scnum
;
3849 ldsym
->l_value
= isym
.n_value
;
3852 ldsym
->l_smtype
= smtyp
;
3853 if (((h
->flags
& XCOFF_DEF_REGULAR
) == 0
3854 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
3855 || (h
->flags
& XCOFF_IMPORT
) != 0)
3856 ldsym
->l_smtype
|= L_IMPORT
;
3857 if (((h
->flags
& XCOFF_DEF_REGULAR
) != 0
3858 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
3859 || (h
->flags
& XCOFF_EXPORT
) != 0)
3860 ldsym
->l_smtype
|= L_EXPORT
;
3861 if ((h
->flags
& XCOFF_ENTRY
) != 0)
3862 ldsym
->l_smtype
|= L_ENTRY
;
3864 ldsym
->l_smclas
= aux
.x_csect
.x_smclas
;
3866 if (ldsym
->l_ifile
== (bfd_size_type
) -1)
3868 else if (ldsym
->l_ifile
== 0)
3870 if ((ldsym
->l_smtype
& L_IMPORT
) == 0)
3876 if (h
->root
.type
== bfd_link_hash_defined
3877 || h
->root
.type
== bfd_link_hash_defweak
)
3878 impbfd
= h
->root
.u
.def
.section
->owner
;
3879 else if (h
->root
.type
== bfd_link_hash_undefined
3880 || h
->root
.type
== bfd_link_hash_undefweak
)
3881 impbfd
= h
->root
.u
.undef
.abfd
;
3889 BFD_ASSERT (impbfd
->xvec
== finfo
->output_bfd
->xvec
);
3890 ldsym
->l_ifile
= xcoff_data (impbfd
)->import_file_id
;
3897 BFD_ASSERT (h
->ldindx
>= 0);
3898 BFD_ASSERT (LDSYMSZ
== sizeof (struct external_ldsym
));
3899 xcoff_swap_ldsym_out (finfo
->output_bfd
, ldsym
,
3900 finfo
->ldsym
+ h
->ldindx
- 3);
3908 add
= 1 + isym
.n_numaux
;
3910 /* If we are skipping this csect, we want to skip this symbol. */
3911 if (*csectpp
== NULL
)
3914 /* If we garbage collected this csect, we want to skip this
3917 && xcoff_hash_table (finfo
->info
)->gc
3918 && ((*csectpp
)->flags
& SEC_MARK
) == 0
3919 && *csectpp
!= bfd_abs_section_ptr
)
3922 /* An XCOFF linker always skips C_STAT symbols. */
3924 && isymp
->n_sclass
== C_STAT
)
3927 /* We skip all but the first TOC anchor. */
3929 && isymp
->n_sclass
== C_HIDEXT
3930 && aux
.x_csect
.x_smclas
== XMC_TC0
)
3932 if (finfo
->toc_symindx
!= -1)
3936 bfd_vma tocval
, tocend
;
3938 tocval
= ((*csectpp
)->output_section
->vma
3939 + (*csectpp
)->output_offset
3942 /* We want to find out if tocval is a good value to use
3943 as the TOC anchor--that is, whether we can access all
3944 of the TOC using a 16 bit offset from tocval. This
3945 test assumes that the TOC comes at the end of the
3946 output section, as it does in the default linker
3947 script. If the TOC anchor is too far into the .toc
3948 section, the relocation routine will report
3950 tocend
= ((*csectpp
)->output_section
->vma
3951 + (*csectpp
)->output_section
->_raw_size
);
3952 if (tocval
+ 0x8000 < tocend
)
3956 tocadd
= tocend
- (tocval
+ 0x8000);
3958 isym
.n_value
+= tocadd
;
3961 finfo
->toc_symindx
= output_index
;
3962 xcoff_data (finfo
->output_bfd
)->toc
= tocval
;
3963 xcoff_data (finfo
->output_bfd
)->toc_section
=
3964 (*csectpp
)->output_section
;
3969 /* If we are stripping all symbols, we want to skip this one. */
3971 && finfo
->info
->strip
== strip_all
)
3974 /* We can skip resolved external references. */
3976 && isym
.n_sclass
== C_EXT
3978 && (*sym_hash
)->root
.type
!= bfd_link_hash_undefined
)
3981 /* We can skip common symbols if they got defined somewhere
3984 && isym
.n_sclass
== C_EXT
3986 && ((*sym_hash
)->root
.type
!= bfd_link_hash_common
3987 || (*sym_hash
)->root
.u
.c
.p
->section
!= *csectpp
)
3988 && ((*sym_hash
)->root
.type
!= bfd_link_hash_defined
3989 || (*sym_hash
)->root
.u
.def
.section
!= *csectpp
))
3992 /* Skip local symbols if we are discarding them. */
3994 && finfo
->info
->discard
== discard_all
3995 && isym
.n_sclass
!= C_EXT
3996 && (isym
.n_sclass
!= C_HIDEXT
3997 || smtyp
!= XTY_SD
))
4000 /* If we stripping debugging symbols, and this is a debugging
4001 symbol, then skip it. */
4003 && finfo
->info
->strip
== strip_debugger
4004 && isym
.n_scnum
== N_DEBUG
)
4007 /* If some symbols are stripped based on the name, work out the
4008 name and decide whether to skip this symbol. We don't handle
4009 this correctly for symbols whose names are in the .debug
4010 section; to get it right we would need a new bfd_strtab_hash
4011 function to return the string given the index. */
4013 && (finfo
->info
->strip
== strip_some
4014 || finfo
->info
->discard
== discard_l
)
4015 && (debug_index
== NULL
|| *debug_index
== (unsigned long) -1))
4018 char buf
[SYMNMLEN
+ 1];
4020 name
= _bfd_coff_internal_syment_name (input_bfd
, &isym
, buf
);
4024 if ((finfo
->info
->strip
== strip_some
4025 && (bfd_hash_lookup (finfo
->info
->keep_hash
, name
, false,
4027 || (finfo
->info
->discard
== discard_l
4028 && (isym
.n_sclass
!= C_EXT
4029 && (isym
.n_sclass
!= C_HIDEXT
4030 || smtyp
!= XTY_SD
))
4031 && strncmp (name
, finfo
->info
->lprefix
,
4032 finfo
->info
->lprefix_len
) == 0))
4036 /* We can not skip the first TOC anchor. */
4039 && finfo
->info
->strip
!= strip_all
)
4042 /* We now know whether we are to skip this symbol or not. */
4045 /* Adjust the symbol in order to output it. */
4047 if (isym
._n
._n_n
._n_zeroes
== 0
4048 && isym
._n
._n_n
._n_offset
!= 0)
4050 /* This symbol has a long name. Enter it in the string
4051 table we are building. If *debug_index != -1, the
4052 name has already been entered in the .debug section. */
4053 if (debug_index
!= NULL
&& *debug_index
!= (unsigned long) -1)
4054 isym
._n
._n_n
._n_offset
= *debug_index
;
4060 name
= _bfd_coff_internal_syment_name (input_bfd
, &isym
,
4064 indx
= _bfd_stringtab_add (finfo
->strtab
, name
, hash
, copy
);
4065 if (indx
== (bfd_size_type
) -1)
4067 isym
._n
._n_n
._n_offset
= STRING_SIZE_SIZE
+ indx
;
4071 if (isym
.n_sclass
!= C_BSTAT
4072 && isym
.n_sclass
!= C_ESTAT
4073 && isym
.n_sclass
!= C_DECL
4074 && isym
.n_scnum
> 0)
4076 isym
.n_scnum
= (*csectpp
)->output_section
->target_index
;
4077 isym
.n_value
+= ((*csectpp
)->output_section
->vma
4078 + (*csectpp
)->output_offset
4082 /* The value of a C_FILE symbol is the symbol index of the
4083 next C_FILE symbol. The value of the last C_FILE symbol
4084 is -1. We try to get this right, below, just before we
4085 write the symbols out, but in the general case we may
4086 have to write the symbol out twice. */
4087 if (isym
.n_sclass
== C_FILE
)
4089 if (finfo
->last_file_index
!= -1
4090 && finfo
->last_file
.n_value
!= (long) output_index
)
4092 /* We must correct the value of the last C_FILE entry. */
4093 finfo
->last_file
.n_value
= output_index
;
4094 if ((bfd_size_type
) finfo
->last_file_index
>= syment_base
)
4096 /* The last C_FILE symbol is in this input file. */
4097 bfd_coff_swap_sym_out (output_bfd
,
4098 (PTR
) &finfo
->last_file
,
4099 (PTR
) (finfo
->outsyms
4100 + ((finfo
->last_file_index
4106 /* We have already written out the last C_FILE
4107 symbol. We need to write it out again. We
4108 borrow *outsym temporarily. */
4109 bfd_coff_swap_sym_out (output_bfd
,
4110 (PTR
) &finfo
->last_file
,
4112 if (bfd_seek (output_bfd
,
4113 (obj_sym_filepos (output_bfd
)
4114 + finfo
->last_file_index
* osymesz
),
4116 || (bfd_write (outsym
, osymesz
, 1, output_bfd
)
4122 finfo
->last_file_index
= output_index
;
4123 finfo
->last_file
= isym
;
4126 /* The value of a C_BINCL or C_EINCL symbol is a file offset
4127 into the line numbers. We update the symbol values when
4128 we handle the line numbers. */
4129 if (isym
.n_sclass
== C_BINCL
4130 || isym
.n_sclass
== C_EINCL
)
4132 isym
.n_value
= finfo
->line_filepos
;
4136 /* Output the symbol. */
4138 bfd_coff_swap_sym_out (output_bfd
, (PTR
) &isym
, (PTR
) outsym
);
4140 *indexp
= output_index
;
4142 if (isym
.n_sclass
== C_EXT
)
4145 struct xcoff_link_hash_entry
*h
;
4147 indx
= ((esym
- (bfd_byte
*) obj_coff_external_syms (input_bfd
))
4149 h
= obj_xcoff_sym_hashes (input_bfd
)[indx
];
4150 BFD_ASSERT (h
!= NULL
);
4151 h
->indx
= output_index
;
4154 /* If this is a symbol in the TOC which we may have merged
4155 (class XMC_TC), remember the symbol index of the TOC
4157 if (isym
.n_sclass
== C_HIDEXT
4158 && aux
.x_csect
.x_smclas
== XMC_TC
4159 && *sym_hash
!= NULL
)
4161 BFD_ASSERT (((*sym_hash
)->flags
& XCOFF_SET_TOC
) == 0);
4162 BFD_ASSERT ((*sym_hash
)->toc_section
!= NULL
);
4163 (*sym_hash
)->u
.toc_indx
= output_index
;
4166 output_index
+= add
;
4167 outsym
+= add
* osymesz
;
4170 esym
+= add
* isymesz
;
4174 if (debug_index
!= NULL
)
4177 for (--add
; add
> 0; --add
)
4181 /* Fix up the aux entries and the C_BSTAT symbols. This must be
4182 done in a separate pass, because we don't know the correct symbol
4183 indices until we have already decided which symbols we are going
4186 esym
= (bfd_byte
*) obj_coff_external_syms (input_bfd
);
4187 esym_end
= esym
+ obj_raw_syment_count (input_bfd
) * isymesz
;
4188 isymp
= finfo
->internal_syms
;
4189 indexp
= finfo
->sym_indices
;
4190 csectpp
= xcoff_data (input_bfd
)->csects
;
4191 outsym
= finfo
->outsyms
;
4192 while (esym
< esym_end
)
4196 add
= 1 + isymp
->n_numaux
;
4199 esym
+= add
* isymesz
;
4204 if (isymp
->n_sclass
== C_BSTAT
)
4206 struct internal_syment isym
;
4209 /* The value of a C_BSTAT symbol is the symbol table
4210 index of the containing csect. */
4211 bfd_coff_swap_sym_in (output_bfd
, (PTR
) outsym
, (PTR
) &isym
);
4212 indx
= isym
.n_value
;
4213 if (indx
< obj_raw_syment_count (input_bfd
))
4217 symindx
= finfo
->sym_indices
[indx
];
4221 isym
.n_value
= symindx
;
4222 bfd_coff_swap_sym_out (output_bfd
, (PTR
) &isym
,
4230 for (i
= 0; i
< isymp
->n_numaux
&& esym
< esym_end
; i
++)
4232 union internal_auxent aux
;
4234 bfd_coff_swap_aux_in (input_bfd
, (PTR
) esym
, isymp
->n_type
,
4235 isymp
->n_sclass
, i
, isymp
->n_numaux
,
4238 if (isymp
->n_sclass
== C_FILE
)
4240 /* This is the file name (or some comment put in by
4241 the compiler). If it is long, we must put it in
4242 the string table. */
4243 if (aux
.x_file
.x_n
.x_zeroes
== 0
4244 && aux
.x_file
.x_n
.x_offset
!= 0)
4246 const char *filename
;
4249 BFD_ASSERT (aux
.x_file
.x_n
.x_offset
4250 >= STRING_SIZE_SIZE
);
4251 if (strings
== NULL
)
4253 strings
= _bfd_coff_read_string_table (input_bfd
);
4254 if (strings
== NULL
)
4257 filename
= strings
+ aux
.x_file
.x_n
.x_offset
;
4258 indx
= _bfd_stringtab_add (finfo
->strtab
, filename
,
4260 if (indx
== (bfd_size_type
) -1)
4262 aux
.x_file
.x_n
.x_offset
= STRING_SIZE_SIZE
+ indx
;
4265 else if ((isymp
->n_sclass
== C_EXT
4266 || isymp
->n_sclass
== C_HIDEXT
)
4267 && i
+ 1 == isymp
->n_numaux
)
4269 /* We don't support type checking. I don't know if
4271 aux
.x_csect
.x_parmhash
= 0;
4272 /* I don't think anybody uses these fields, but we'd
4273 better clobber them just in case. */
4274 aux
.x_csect
.x_stab
= 0;
4275 aux
.x_csect
.x_snstab
= 0;
4276 if (SMTYP_SMTYP (aux
.x_csect
.x_smtyp
) == XTY_LD
)
4280 indx
= aux
.x_csect
.x_scnlen
.l
;
4281 if (indx
< obj_raw_syment_count (input_bfd
))
4285 symindx
= finfo
->sym_indices
[indx
];
4287 aux
.x_sym
.x_tagndx
.l
= 0;
4289 aux
.x_sym
.x_tagndx
.l
= symindx
;
4293 else if (isymp
->n_sclass
!= C_STAT
|| isymp
->n_type
!= T_NULL
)
4297 if (ISFCN (isymp
->n_type
)
4298 || ISTAG (isymp
->n_sclass
)
4299 || isymp
->n_sclass
== C_BLOCK
)
4301 indx
= aux
.x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
;
4303 && indx
< obj_raw_syment_count (input_bfd
))
4305 /* We look forward through the symbol for
4306 the index of the next symbol we are going
4307 to include. I don't know if this is
4309 while (finfo
->sym_indices
[indx
] < 0
4310 && indx
< obj_raw_syment_count (input_bfd
))
4312 if (indx
>= obj_raw_syment_count (input_bfd
))
4313 indx
= output_index
;
4315 indx
= finfo
->sym_indices
[indx
];
4316 aux
.x_sym
.x_fcnary
.x_fcn
.x_endndx
.l
= indx
;
4320 indx
= aux
.x_sym
.x_tagndx
.l
;
4321 if (indx
> 0 && indx
< obj_raw_syment_count (input_bfd
))
4325 symindx
= finfo
->sym_indices
[indx
];
4327 aux
.x_sym
.x_tagndx
.l
= 0;
4329 aux
.x_sym
.x_tagndx
.l
= symindx
;
4333 /* Copy over the line numbers, unless we are stripping
4334 them. We do this on a symbol by symbol basis in
4335 order to more easily handle garbage collection. */
4336 if ((isymp
->n_sclass
== C_EXT
4337 || isymp
->n_sclass
== C_HIDEXT
)
4339 && isymp
->n_numaux
> 1
4340 && ISFCN (isymp
->n_type
)
4341 && aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
!= 0)
4343 if (finfo
->info
->strip
!= strip_none
4344 && finfo
->info
->strip
!= strip_some
)
4345 aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
= 0;
4348 asection
*enclosing
;
4349 unsigned int enc_count
;
4350 bfd_size_type linoff
;
4351 struct internal_lineno lin
;
4354 enclosing
= xcoff_section_data (abfd
, o
)->enclosing
;
4355 enc_count
= xcoff_section_data (abfd
, o
)->lineno_count
;
4356 if (oline
!= enclosing
)
4358 if (bfd_seek (input_bfd
,
4359 enclosing
->line_filepos
,
4361 || (bfd_read (finfo
->linenos
, linesz
,
4362 enc_count
, input_bfd
)
4363 != linesz
* enc_count
))
4368 linoff
= (aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
4369 - enclosing
->line_filepos
);
4371 bfd_coff_swap_lineno_in (input_bfd
,
4372 (PTR
) (finfo
->linenos
+ linoff
),
4375 || ((bfd_size_type
) lin
.l_addr
.l_symndx
4379 obj_coff_external_syms (input_bfd
)))
4381 aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
= 0;
4384 bfd_byte
*linpend
, *linp
;
4386 bfd_size_type count
;
4388 lin
.l_addr
.l_symndx
= *indexp
;
4389 bfd_coff_swap_lineno_out (output_bfd
, (PTR
) &lin
,
4390 (PTR
) (finfo
->linenos
4393 linpend
= (finfo
->linenos
4394 + enc_count
* linesz
);
4395 offset
= (o
->output_section
->vma
4398 for (linp
= finfo
->linenos
+ linoff
+ linesz
;
4402 bfd_coff_swap_lineno_in (input_bfd
, (PTR
) linp
,
4404 if (lin
.l_lnno
== 0)
4406 lin
.l_addr
.l_paddr
+= offset
;
4407 bfd_coff_swap_lineno_out (output_bfd
,
4412 count
= (linp
- (finfo
->linenos
+ linoff
)) / linesz
;
4414 aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
=
4415 (o
->output_section
->line_filepos
4416 + o
->output_section
->lineno_count
* linesz
);
4418 if (bfd_seek (output_bfd
,
4419 aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
,
4421 || (bfd_write (finfo
->linenos
+ linoff
,
4422 linesz
, count
, output_bfd
)
4426 o
->output_section
->lineno_count
+= count
;
4430 struct internal_syment
*iisp
, *iispend
;
4434 /* Update any C_BINCL or C_EINCL symbols
4435 that refer to a line number in the
4436 range we just output. */
4437 iisp
= finfo
->internal_syms
;
4439 + obj_raw_syment_count (input_bfd
));
4440 iindp
= finfo
->sym_indices
;
4441 oos
= finfo
->outsyms
;
4442 while (iisp
< iispend
)
4444 if ((iisp
->n_sclass
== C_BINCL
4445 || iisp
->n_sclass
== C_EINCL
)
4446 && ((bfd_size_type
) iisp
->n_value
4447 >= enclosing
->line_filepos
+ linoff
)
4448 && ((bfd_size_type
) iisp
->n_value
4449 < (enclosing
->line_filepos
4450 + enc_count
* linesz
)))
4452 struct internal_syment iis
;
4454 bfd_coff_swap_sym_in (output_bfd
,
4459 - enclosing
->line_filepos
4461 + aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
);
4462 bfd_coff_swap_sym_out (output_bfd
,
4468 iisp
+= iisp
->n_numaux
+ 1;
4469 iindp
+= iisp
->n_numaux
+ 1;
4470 oos
+= (iisp
->n_numaux
+ 1) * osymesz
;
4477 bfd_coff_swap_aux_out (output_bfd
, (PTR
) &aux
, isymp
->n_type
,
4478 isymp
->n_sclass
, i
, isymp
->n_numaux
,
4490 /* If we swapped out a C_FILE symbol, guess that the next C_FILE
4491 symbol will be the first symbol in the next input file. In the
4492 normal case, this will save us from writing out the C_FILE symbol
4494 if (finfo
->last_file_index
!= -1
4495 && (bfd_size_type
) finfo
->last_file_index
>= syment_base
)
4497 finfo
->last_file
.n_value
= output_index
;
4498 bfd_coff_swap_sym_out (output_bfd
, (PTR
) &finfo
->last_file
,
4499 (PTR
) (finfo
->outsyms
4500 + ((finfo
->last_file_index
- syment_base
)
4504 /* Write the modified symbols to the output file. */
4505 if (outsym
> finfo
->outsyms
)
4507 if (bfd_seek (output_bfd
,
4508 obj_sym_filepos (output_bfd
) + syment_base
* osymesz
,
4510 || (bfd_write (finfo
->outsyms
, outsym
- finfo
->outsyms
, 1,
4512 != (bfd_size_type
) (outsym
- finfo
->outsyms
)))
4515 BFD_ASSERT ((obj_raw_syment_count (output_bfd
)
4516 + (outsym
- finfo
->outsyms
) / osymesz
)
4519 obj_raw_syment_count (output_bfd
) = output_index
;
4522 /* Don't let the linker relocation routines discard the symbols. */
4523 keep_syms
= obj_coff_keep_syms (input_bfd
);
4524 obj_coff_keep_syms (input_bfd
) = true;
4526 /* Relocate the contents of each section. */
4527 for (o
= input_bfd
->sections
; o
!= NULL
; o
= o
->next
)
4531 if ((o
->flags
& SEC_HAS_CONTENTS
) == 0
4532 || o
->_raw_size
== 0
4533 || (o
->flags
& SEC_IN_MEMORY
) != 0)
4536 /* We have set filepos correctly for the sections we created to
4537 represent csects, so bfd_get_section_contents should work. */
4538 if (coff_section_data (input_bfd
, o
) != NULL
4539 && coff_section_data (input_bfd
, o
)->contents
!= NULL
)
4540 contents
= coff_section_data (input_bfd
, o
)->contents
;
4543 if (! bfd_get_section_contents (input_bfd
, o
, finfo
->contents
,
4544 (file_ptr
) 0, o
->_raw_size
))
4546 contents
= finfo
->contents
;
4549 if ((o
->flags
& SEC_RELOC
) != 0)
4552 struct internal_reloc
*internal_relocs
;
4553 struct internal_reloc
*irel
;
4555 struct internal_reloc
*irelend
;
4556 struct xcoff_link_hash_entry
**rel_hash
;
4559 /* Read in the relocs. */
4560 target_index
= o
->output_section
->target_index
;
4561 internal_relocs
= (xcoff_read_internal_relocs
4562 (input_bfd
, o
, false, finfo
->external_relocs
,
4564 (finfo
->section_info
[target_index
].relocs
4565 + o
->output_section
->reloc_count
)));
4566 if (internal_relocs
== NULL
)
4569 /* Call processor specific code to relocate the section
4571 if (! bfd_coff_relocate_section (output_bfd
, finfo
->info
,
4575 finfo
->internal_syms
,
4576 xcoff_data (input_bfd
)->csects
))
4579 offset
= o
->output_section
->vma
+ o
->output_offset
- o
->vma
;
4580 irel
= internal_relocs
;
4581 irelend
= irel
+ o
->reloc_count
;
4582 rel_hash
= (finfo
->section_info
[target_index
].rel_hashes
4583 + o
->output_section
->reloc_count
);
4584 for (; irel
< irelend
; irel
++, rel_hash
++)
4586 struct xcoff_link_hash_entry
*h
= NULL
;
4587 struct internal_ldrel ldrel
;
4591 /* Adjust the reloc address and symbol index. */
4593 irel
->r_vaddr
+= offset
;
4595 r_symndx
= irel
->r_symndx
;
4599 h
= obj_xcoff_sym_hashes (input_bfd
)[r_symndx
];
4601 && (irel
->r_type
== R_TOC
4602 || irel
->r_type
== R_GL
4603 || irel
->r_type
== R_TCL
4604 || irel
->r_type
== R_TRL
4605 || irel
->r_type
== R_TRLA
))
4607 /* This is a TOC relative reloc with a symbol
4608 attached. The symbol should be the one which
4609 this reloc is for. We want to make this
4610 reloc against the TOC address of the symbol,
4611 not the symbol itself. */
4612 BFD_ASSERT (h
->toc_section
!= NULL
);
4613 BFD_ASSERT ((h
->flags
& XCOFF_SET_TOC
) == 0);
4614 if (h
->u
.toc_indx
!= -1)
4615 irel
->r_symndx
= h
->u
.toc_indx
;
4618 struct xcoff_toc_rel_hash
*n
;
4619 struct xcoff_link_section_info
*si
;
4621 n
= ((struct xcoff_toc_rel_hash
*)
4622 bfd_alloc (finfo
->output_bfd
,
4623 sizeof (struct xcoff_toc_rel_hash
)));
4626 si
= finfo
->section_info
+ target_index
;
4627 n
->next
= si
->toc_rel_hashes
;
4630 si
->toc_rel_hashes
= n
;
4635 /* This is a global symbol. */
4637 irel
->r_symndx
= h
->indx
;
4640 /* This symbol is being written at the end
4641 of the file, and we do not yet know the
4642 symbol index. We save the pointer to the
4643 hash table entry in the rel_hash list.
4644 We set the indx field to -2 to indicate
4645 that this symbol must not be stripped. */
4654 indx
= finfo
->sym_indices
[r_symndx
];
4658 struct internal_syment
*is
;
4660 /* Relocations against a TC0 TOC anchor are
4661 automatically transformed to be against
4662 the TOC anchor in the output file. */
4663 is
= finfo
->internal_syms
+ r_symndx
;
4664 if (is
->n_sclass
== C_HIDEXT
4665 && is
->n_numaux
> 0)
4668 union internal_auxent aux
;
4672 obj_coff_external_syms (input_bfd
))
4673 + ((r_symndx
+ is
->n_numaux
)
4675 bfd_coff_swap_aux_in (input_bfd
, auxptr
,
4676 is
->n_type
, is
->n_sclass
,
4680 if (SMTYP_SMTYP (aux
.x_csect
.x_smtyp
) == XTY_SD
4681 && aux
.x_csect
.x_smclas
== XMC_TC0
)
4682 indx
= finfo
->toc_symindx
;
4687 irel
->r_symndx
= indx
;
4690 struct internal_syment
*is
;
4692 char buf
[SYMNMLEN
+ 1];
4694 /* This reloc is against a symbol we are
4695 stripping. It would be possible to handle
4696 this case, but I don't think it's worth it. */
4697 is
= finfo
->internal_syms
+ r_symndx
;
4699 name
= (_bfd_coff_internal_syment_name
4700 (input_bfd
, is
, buf
));
4704 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
4705 (finfo
->info
, name
, input_bfd
, o
,
4712 switch (irel
->r_type
)
4716 || h
->root
.type
== bfd_link_hash_defined
4717 || h
->root
.type
== bfd_link_hash_defweak
4718 || h
->root
.type
== bfd_link_hash_common
)
4725 /* This reloc needs to be copied into the .loader
4727 ldrel
.l_vaddr
= irel
->r_vaddr
;
4729 ldrel
.l_symndx
= -1;
4731 || (h
->root
.type
== bfd_link_hash_defined
4732 || h
->root
.type
== bfd_link_hash_defweak
4733 || h
->root
.type
== bfd_link_hash_common
))
4738 sec
= xcoff_data (input_bfd
)->csects
[r_symndx
];
4739 else if (h
->root
.type
== bfd_link_hash_common
)
4740 sec
= h
->root
.u
.c
.p
->section
;
4742 sec
= h
->root
.u
.def
.section
;
4743 sec
= sec
->output_section
;
4745 if (strcmp (sec
->name
, ".text") == 0)
4747 else if (strcmp (sec
->name
, ".data") == 0)
4749 else if (strcmp (sec
->name
, ".bss") == 0)
4753 (*_bfd_error_handler
)
4754 ("%s: loader reloc in unrecognized section `%s'",
4755 bfd_get_filename (input_bfd
),
4757 bfd_set_error (bfd_error_nonrepresentable_section
);
4765 (*_bfd_error_handler
)
4766 ("%s: `%s' in loader reloc but not loader sym",
4767 bfd_get_filename (input_bfd
),
4768 h
->root
.root
.string
);
4769 bfd_set_error (bfd_error_bad_value
);
4772 ldrel
.l_symndx
= h
->ldindx
;
4774 ldrel
.l_rtype
= (irel
->r_size
<< 8) | irel
->r_type
;
4775 ldrel
.l_rsecnm
= o
->output_section
->target_index
;
4776 if (xcoff_hash_table (finfo
->info
)->textro
4777 && strcmp (o
->output_section
->name
, ".text") == 0)
4779 (*_bfd_error_handler
)
4780 ("%s: loader reloc in read-only section %s",
4781 bfd_get_filename (input_bfd
),
4782 bfd_get_section_name (finfo
->output_bfd
,
4783 o
->output_section
));
4784 bfd_set_error (bfd_error_invalid_operation
);
4787 xcoff_swap_ldrel_out (output_bfd
, &ldrel
,
4789 BFD_ASSERT (sizeof (struct external_ldrel
) == LDRELSZ
);
4798 /* We should never need a .loader reloc for a TOC
4804 o
->output_section
->reloc_count
+= o
->reloc_count
;
4807 /* Write out the modified section contents. */
4808 if (! bfd_set_section_contents (output_bfd
, o
->output_section
,
4809 contents
, o
->output_offset
,
4810 (o
->_cooked_size
!= 0
4816 obj_coff_keep_syms (input_bfd
) = keep_syms
;
4818 if (! finfo
->info
->keep_memory
)
4820 if (! _bfd_coff_free_symbols (input_bfd
))
4830 /* Write out a non-XCOFF global symbol. */
4833 xcoff_write_global_symbol (h
, p
)
4834 struct xcoff_link_hash_entry
*h
;
4837 struct xcoff_final_link_info
*finfo
= (struct xcoff_final_link_info
*) p
;
4840 struct internal_syment isym
;
4841 union internal_auxent aux
;
4843 output_bfd
= finfo
->output_bfd
;
4845 /* If this symbol was garbage collected, just skip it. */
4846 if (xcoff_hash_table (finfo
->info
)->gc
4847 && (h
->flags
& XCOFF_MARK
) == 0)
4850 /* If we need a .loader section entry, write it out. */
4851 if (h
->ldsym
!= NULL
)
4853 struct internal_ldsym
*ldsym
;
4858 if (h
->root
.type
== bfd_link_hash_undefined
4859 || h
->root
.type
== bfd_link_hash_undefweak
)
4862 ldsym
->l_scnum
= N_UNDEF
;
4863 ldsym
->l_smtype
= XTY_ER
;
4864 impbfd
= h
->root
.u
.undef
.abfd
;
4866 else if (h
->root
.type
== bfd_link_hash_defined
4867 || h
->root
.type
== bfd_link_hash_defweak
)
4871 sec
= h
->root
.u
.def
.section
;
4872 ldsym
->l_value
= (sec
->output_section
->vma
4873 + sec
->output_offset
4874 + h
->root
.u
.def
.value
);
4875 ldsym
->l_scnum
= sec
->output_section
->target_index
;
4876 ldsym
->l_smtype
= XTY_SD
;
4877 impbfd
= sec
->owner
;
4882 if (((h
->flags
& XCOFF_DEF_REGULAR
) == 0
4883 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
4884 || (h
->flags
& XCOFF_IMPORT
) != 0)
4885 ldsym
->l_smtype
|= L_IMPORT
;
4886 if (((h
->flags
& XCOFF_DEF_REGULAR
) != 0
4887 && (h
->flags
& XCOFF_DEF_DYNAMIC
) != 0)
4888 || (h
->flags
& XCOFF_EXPORT
) != 0)
4889 ldsym
->l_smtype
|= L_EXPORT
;
4890 if ((h
->flags
& XCOFF_ENTRY
) != 0)
4891 ldsym
->l_smtype
|= L_ENTRY
;
4893 ldsym
->l_smclas
= h
->smclas
;
4895 if (ldsym
->l_ifile
== (bfd_size_type
) -1)
4897 else if (ldsym
->l_ifile
== 0)
4899 if ((ldsym
->l_smtype
& L_IMPORT
) == 0)
4901 else if (impbfd
== NULL
)
4905 BFD_ASSERT (impbfd
->xvec
== output_bfd
->xvec
);
4906 ldsym
->l_ifile
= xcoff_data (impbfd
)->import_file_id
;
4912 BFD_ASSERT (h
->ldindx
>= 0);
4913 BFD_ASSERT (LDSYMSZ
== sizeof (struct external_ldsym
));
4914 xcoff_swap_ldsym_out (output_bfd
, ldsym
, finfo
->ldsym
+ h
->ldindx
- 3);
4918 /* If this symbol needs global linkage code, write it out. */
4919 if (h
->root
.type
== bfd_link_hash_defined
4920 && (h
->root
.u
.def
.section
4921 == xcoff_hash_table (finfo
->info
)->linkage_section
))
4927 p
= h
->root
.u
.def
.section
->contents
+ h
->root
.u
.def
.value
;
4929 /* The first instruction in the global linkage code loads a
4930 specific TOC element. */
4931 tocoff
= (h
->descriptor
->toc_section
->output_section
->vma
4932 + h
->descriptor
->toc_section
->output_offset
4933 - xcoff_data (output_bfd
)->toc
);
4934 if ((h
->descriptor
->flags
& XCOFF_SET_TOC
) != 0)
4935 tocoff
+= h
->descriptor
->u
.toc_offset
;
4936 bfd_put_32 (output_bfd
, XCOFF_GLINK_FIRST
| (tocoff
& 0xffff), p
);
4938 i
< sizeof xcoff_glink_code
/ sizeof xcoff_glink_code
[0];
4940 bfd_put_32 (output_bfd
, xcoff_glink_code
[i
], p
);
4943 /* If we created a TOC entry for this symbol, write out the required
4945 if ((h
->flags
& XCOFF_SET_TOC
) != 0)
4950 struct internal_reloc
*irel
;
4951 struct internal_ldrel ldrel
;
4953 tocsec
= h
->toc_section
;
4954 osec
= tocsec
->output_section
;
4955 oindx
= osec
->target_index
;
4956 irel
= finfo
->section_info
[oindx
].relocs
+ osec
->reloc_count
;
4957 irel
->r_vaddr
= (osec
->vma
4958 + tocsec
->output_offset
4961 irel
->r_symndx
= h
->indx
;
4965 irel
->r_symndx
= obj_raw_syment_count (output_bfd
);
4967 irel
->r_type
= R_POS
;
4969 finfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
4970 ++osec
->reloc_count
;
4972 BFD_ASSERT (h
->ldindx
>= 0);
4973 ldrel
.l_vaddr
= irel
->r_vaddr
;
4974 ldrel
.l_symndx
= h
->ldindx
;
4975 ldrel
.l_rtype
= (31 << 8) | R_POS
;
4976 ldrel
.l_rsecnm
= oindx
;
4977 xcoff_swap_ldrel_out (output_bfd
, &ldrel
, finfo
->ldrel
);
4981 /* If this symbol is a specially defined function descriptor, write
4982 it out. The first word is the address of the function code
4983 itself, the second word is the address of the TOC, and the third
4985 if ((h
->flags
& XCOFF_DESCRIPTOR
) != 0
4986 && h
->root
.type
== bfd_link_hash_defined
4987 && (h
->root
.u
.def
.section
4988 == xcoff_hash_table (finfo
->info
)->descriptor_section
))
4994 struct xcoff_link_hash_entry
*hentry
;
4996 struct internal_reloc
*irel
;
4997 struct internal_ldrel ldrel
;
5000 sec
= h
->root
.u
.def
.section
;
5001 osec
= sec
->output_section
;
5002 oindx
= osec
->target_index
;
5003 p
= sec
->contents
+ h
->root
.u
.def
.value
;
5005 hentry
= h
->descriptor
;
5006 BFD_ASSERT (hentry
!= NULL
5007 && (hentry
->root
.type
== bfd_link_hash_defined
5008 || hentry
->root
.type
== bfd_link_hash_defweak
));
5009 esec
= hentry
->root
.u
.def
.section
;
5010 bfd_put_32 (output_bfd
,
5011 (esec
->output_section
->vma
5012 + esec
->output_offset
5013 + hentry
->root
.u
.def
.value
),
5016 irel
= finfo
->section_info
[oindx
].relocs
+ osec
->reloc_count
;
5017 irel
->r_vaddr
= (osec
->vma
5018 + sec
->output_offset
5019 + h
->root
.u
.def
.value
);
5020 irel
->r_symndx
= esec
->output_section
->target_index
;
5021 irel
->r_type
= R_POS
;
5023 finfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
5024 ++osec
->reloc_count
;
5026 ldrel
.l_vaddr
= irel
->r_vaddr
;
5027 if (strcmp (esec
->output_section
->name
, ".text") == 0)
5029 else if (strcmp (esec
->output_section
->name
, ".data") == 0)
5031 else if (strcmp (esec
->output_section
->name
, ".bss") == 0)
5035 (*_bfd_error_handler
)
5036 ("%s: loader reloc in unrecognized section `%s'",
5037 bfd_get_filename (output_bfd
),
5038 esec
->output_section
->name
);
5039 bfd_set_error (bfd_error_nonrepresentable_section
);
5042 ldrel
.l_rtype
= (31 << 8) | R_POS
;
5043 ldrel
.l_rsecnm
= oindx
;
5044 xcoff_swap_ldrel_out (output_bfd
, &ldrel
, finfo
->ldrel
);
5047 bfd_put_32 (output_bfd
, xcoff_data (output_bfd
)->toc
, p
+ 4);
5049 tsec
= xcoff_data (output_bfd
)->toc_section
;
5052 irel
->r_vaddr
= (osec
->vma
5053 + sec
->output_offset
5054 + h
->root
.u
.def
.value
5056 irel
->r_symndx
= tsec
->output_section
->target_index
;
5057 irel
->r_type
= R_POS
;
5059 finfo
->section_info
[oindx
].rel_hashes
[osec
->reloc_count
] = NULL
;
5060 ++osec
->reloc_count
;
5062 ldrel
.l_vaddr
= irel
->r_vaddr
;
5063 if (strcmp (tsec
->output_section
->name
, ".text") == 0)
5065 else if (strcmp (tsec
->output_section
->name
, ".data") == 0)
5067 else if (strcmp (tsec
->output_section
->name
, ".bss") == 0)
5071 (*_bfd_error_handler
)
5072 ("%s: loader reloc in unrecognized section `%s'",
5073 bfd_get_filename (output_bfd
),
5074 tsec
->output_section
->name
);
5075 bfd_set_error (bfd_error_nonrepresentable_section
);
5078 ldrel
.l_rtype
= (31 << 8) | R_POS
;
5079 ldrel
.l_rsecnm
= oindx
;
5080 xcoff_swap_ldrel_out (output_bfd
, &ldrel
, finfo
->ldrel
);
5088 && (finfo
->info
->strip
== strip_all
5089 || (finfo
->info
->strip
== strip_some
5090 && (bfd_hash_lookup (finfo
->info
->keep_hash
,
5091 h
->root
.root
.string
, false, false)
5096 && (h
->flags
& (XCOFF_REF_REGULAR
| XCOFF_DEF_REGULAR
)) == 0)
5099 outsym
= finfo
->outsyms
;
5101 memset (&aux
, 0, sizeof aux
);
5103 h
->indx
= obj_raw_syment_count (output_bfd
);
5105 if (strlen (h
->root
.root
.string
) <= SYMNMLEN
)
5106 strncpy (isym
._n
._n_name
, h
->root
.root
.string
, SYMNMLEN
);
5113 if ((output_bfd
->flags
& BFD_TRADITIONAL_FORMAT
) != 0)
5115 indx
= _bfd_stringtab_add (finfo
->strtab
, h
->root
.root
.string
, hash
,
5117 if (indx
== (bfd_size_type
) -1)
5119 isym
._n
._n_n
._n_zeroes
= 0;
5120 isym
._n
._n_n
._n_offset
= STRING_SIZE_SIZE
+ indx
;
5123 if (h
->root
.type
== bfd_link_hash_undefined
5124 || h
->root
.type
== bfd_link_hash_undefweak
)
5127 isym
.n_scnum
= N_UNDEF
;
5128 isym
.n_sclass
= C_EXT
;
5129 aux
.x_csect
.x_smtyp
= XTY_ER
;
5131 else if (h
->root
.type
== bfd_link_hash_defined
5132 || h
->root
.type
== bfd_link_hash_defweak
)
5134 struct xcoff_link_size_list
*l
;
5136 isym
.n_value
= (h
->root
.u
.def
.section
->output_section
->vma
5137 + h
->root
.u
.def
.section
->output_offset
5138 + h
->root
.u
.def
.value
);
5139 isym
.n_scnum
= h
->root
.u
.def
.section
->output_section
->target_index
;
5140 isym
.n_sclass
= C_HIDEXT
;
5141 aux
.x_csect
.x_smtyp
= XTY_SD
;
5143 if ((h
->flags
& XCOFF_HAS_SIZE
) != 0)
5145 for (l
= xcoff_hash_table (finfo
->info
)->size_list
;
5151 aux
.x_csect
.x_scnlen
.l
= l
->size
;
5157 else if (h
->root
.type
== bfd_link_hash_common
)
5159 isym
.n_value
= (h
->root
.u
.c
.p
->section
->output_section
->vma
5160 + h
->root
.u
.c
.p
->section
->output_offset
);
5161 isym
.n_scnum
= h
->root
.u
.c
.p
->section
->output_section
->target_index
;
5162 isym
.n_sclass
= C_EXT
;
5163 aux
.x_csect
.x_smtyp
= XTY_CM
;
5164 aux
.x_csect
.x_scnlen
.l
= h
->root
.u
.c
.size
;
5169 isym
.n_type
= T_NULL
;
5172 bfd_coff_swap_sym_out (output_bfd
, (PTR
) &isym
, (PTR
) outsym
);
5173 outsym
+= bfd_coff_symesz (output_bfd
);
5175 aux
.x_csect
.x_smclas
= h
->smclas
;
5177 bfd_coff_swap_aux_out (output_bfd
, (PTR
) &aux
, T_NULL
, isym
.n_sclass
, 0, 1,
5179 outsym
+= bfd_coff_auxesz (output_bfd
);
5181 if (h
->root
.type
== bfd_link_hash_defined
5182 || h
->root
.type
== bfd_link_hash_defweak
)
5184 /* We just output an SD symbol. Now output an LD symbol. */
5188 isym
.n_sclass
= C_EXT
;
5189 bfd_coff_swap_sym_out (output_bfd
, (PTR
) &isym
, (PTR
) outsym
);
5190 outsym
+= bfd_coff_symesz (output_bfd
);
5192 aux
.x_csect
.x_smtyp
= XTY_LD
;
5193 aux
.x_csect
.x_scnlen
.l
= obj_raw_syment_count (output_bfd
);
5195 bfd_coff_swap_aux_out (output_bfd
, (PTR
) &aux
, T_NULL
, C_EXT
, 0, 1,
5197 outsym
+= bfd_coff_auxesz (output_bfd
);
5200 if (bfd_seek (output_bfd
,
5201 (obj_sym_filepos (output_bfd
)
5202 + (obj_raw_syment_count (output_bfd
)
5203 * bfd_coff_symesz (output_bfd
))),
5205 || (bfd_write (finfo
->outsyms
, outsym
- finfo
->outsyms
, 1, output_bfd
)
5206 != (bfd_size_type
) (outsym
- finfo
->outsyms
)))
5208 obj_raw_syment_count (output_bfd
) +=
5209 (outsym
- finfo
->outsyms
) / bfd_coff_symesz (output_bfd
);
5214 /* Handle a link order which is supposed to generate a reloc. */
5217 xcoff_reloc_link_order (output_bfd
, finfo
, output_section
, link_order
)
5219 struct xcoff_final_link_info
*finfo
;
5220 asection
*output_section
;
5221 struct bfd_link_order
*link_order
;
5223 reloc_howto_type
*howto
;
5224 struct xcoff_link_hash_entry
*h
;
5228 struct internal_reloc
*irel
;
5229 struct xcoff_link_hash_entry
**rel_hash_ptr
;
5230 struct internal_ldrel ldrel
;
5232 if (link_order
->type
== bfd_section_reloc_link_order
)
5234 /* We need to somehow locate a symbol in the right section. The
5235 symbol must either have a value of zero, or we must adjust
5236 the addend by the value of the symbol. FIXME: Write this
5237 when we need it. The old linker couldn't handle this anyhow. */
5241 howto
= bfd_reloc_type_lookup (output_bfd
, link_order
->u
.reloc
.p
->reloc
);
5244 bfd_set_error (bfd_error_bad_value
);
5248 h
= xcoff_link_hash_lookup (xcoff_hash_table (finfo
->info
),
5249 link_order
->u
.reloc
.p
->u
.name
,
5250 false, false, true);
5253 if (! ((*finfo
->info
->callbacks
->unattached_reloc
)
5254 (finfo
->info
, link_order
->u
.reloc
.p
->u
.name
, (bfd
*) NULL
,
5255 (asection
*) NULL
, (bfd_vma
) 0)))
5260 if (h
->root
.type
== bfd_link_hash_common
)
5262 hsec
= h
->root
.u
.c
.p
->section
;
5265 else if (h
->root
.type
== bfd_link_hash_defined
5266 || h
->root
.type
== bfd_link_hash_defweak
)
5268 hsec
= h
->root
.u
.def
.section
;
5269 hval
= h
->root
.u
.def
.value
;
5277 addend
= link_order
->u
.reloc
.p
->addend
;
5279 addend
+= (hsec
->output_section
->vma
5280 + hsec
->output_offset
5287 bfd_reloc_status_type rstat
;
5290 size
= bfd_get_reloc_size (howto
);
5291 buf
= (bfd_byte
*) bfd_zmalloc (size
);
5295 rstat
= _bfd_relocate_contents (howto
, output_bfd
, addend
, buf
);
5301 case bfd_reloc_outofrange
:
5303 case bfd_reloc_overflow
:
5304 if (! ((*finfo
->info
->callbacks
->reloc_overflow
)
5305 (finfo
->info
, link_order
->u
.reloc
.p
->u
.name
,
5306 howto
->name
, addend
, (bfd
*) NULL
, (asection
*) NULL
,
5314 ok
= bfd_set_section_contents (output_bfd
, output_section
, (PTR
) buf
,
5315 (file_ptr
) link_order
->offset
, size
);
5321 /* Store the reloc information in the right place. It will get
5322 swapped and written out at the end of the final_link routine. */
5324 irel
= (finfo
->section_info
[output_section
->target_index
].relocs
5325 + output_section
->reloc_count
);
5326 rel_hash_ptr
= (finfo
->section_info
[output_section
->target_index
].rel_hashes
5327 + output_section
->reloc_count
);
5329 memset (irel
, 0, sizeof (struct internal_reloc
));
5330 *rel_hash_ptr
= NULL
;
5332 irel
->r_vaddr
= output_section
->vma
+ link_order
->offset
;
5335 irel
->r_symndx
= h
->indx
;
5338 /* Set the index to -2 to force this symbol to get written out. */
5344 irel
->r_type
= howto
->type
;
5345 irel
->r_size
= howto
->bitsize
- 1;
5346 if (howto
->complain_on_overflow
== complain_overflow_signed
)
5347 irel
->r_size
|= 0x80;
5349 ++output_section
->reloc_count
;
5351 /* Now output the reloc to the .loader section. */
5353 ldrel
.l_vaddr
= irel
->r_vaddr
;
5357 const char *secname
;
5359 secname
= hsec
->output_section
->name
;
5361 if (strcmp (secname
, ".text") == 0)
5363 else if (strcmp (secname
, ".data") == 0)
5365 else if (strcmp (secname
, ".bss") == 0)
5369 (*_bfd_error_handler
)
5370 ("%s: loader reloc in unrecognized section `%s'",
5371 bfd_get_filename (output_bfd
), secname
);
5372 bfd_set_error (bfd_error_nonrepresentable_section
);
5380 (*_bfd_error_handler
)
5381 ("%s: `%s' in loader reloc but not loader sym",
5382 bfd_get_filename (output_bfd
),
5383 h
->root
.root
.string
);
5384 bfd_set_error (bfd_error_bad_value
);
5387 ldrel
.l_symndx
= h
->ldindx
;
5390 ldrel
.l_rtype
= (irel
->r_size
<< 8) | irel
->r_type
;
5391 ldrel
.l_rsecnm
= output_section
->target_index
;
5392 xcoff_swap_ldrel_out (output_bfd
, &ldrel
, finfo
->ldrel
);
5398 /* Sort relocs by VMA. This is called via qsort. */
5401 xcoff_sort_relocs (p1
, p2
)
5405 const struct internal_reloc
*r1
= (const struct internal_reloc
*) p1
;
5406 const struct internal_reloc
*r2
= (const struct internal_reloc
*) p2
;
5408 if (r1
->r_vaddr
> r2
->r_vaddr
)
5410 else if (r1
->r_vaddr
< r2
->r_vaddr
)
5416 /* This is the relocation function for the RS/6000/POWER/PowerPC.
5417 This is currently the only processor which uses XCOFF; I hope that
5418 will never change. */
5421 _bfd_ppc_xcoff_relocate_section (output_bfd
, info
, input_bfd
,
5422 input_section
, contents
, relocs
, syms
,
5425 struct bfd_link_info
*info
;
5427 asection
*input_section
;
5429 struct internal_reloc
*relocs
;
5430 struct internal_syment
*syms
;
5431 asection
**sections
;
5433 struct internal_reloc
*rel
;
5434 struct internal_reloc
*relend
;
5437 relend
= rel
+ input_section
->reloc_count
;
5438 for (; rel
< relend
; rel
++)
5441 struct xcoff_link_hash_entry
*h
;
5442 struct internal_syment
*sym
;
5445 struct reloc_howto_struct howto
;
5446 bfd_reloc_status_type rstat
;
5448 /* Relocation type R_REF is a special relocation type which is
5449 merely used to prevent garbage collection from occurring for
5450 the csect including the symbol which it references. */
5451 if (rel
->r_type
== R_REF
)
5454 symndx
= rel
->r_symndx
;
5464 h
= obj_xcoff_sym_hashes (input_bfd
)[symndx
];
5465 sym
= syms
+ symndx
;
5466 addend
= - sym
->n_value
;
5469 /* We build the howto information on the fly. */
5471 howto
.type
= rel
->r_type
;
5472 howto
.rightshift
= 0;
5474 howto
.bitsize
= (rel
->r_size
& 0x1f) + 1;
5475 howto
.pc_relative
= false;
5477 if ((rel
->r_size
& 0x80) != 0)
5478 howto
.complain_on_overflow
= complain_overflow_signed
;
5480 howto
.complain_on_overflow
= complain_overflow_bitfield
;
5481 howto
.special_function
= NULL
;
5482 howto
.name
= "internal";
5483 howto
.partial_inplace
= true;
5484 if (howto
.bitsize
== 32)
5485 howto
.src_mask
= howto
.dst_mask
= 0xffffffff;
5488 howto
.src_mask
= howto
.dst_mask
= (1 << howto
.bitsize
) - 1;
5489 if (howto
.bitsize
== 16)
5492 howto
.pcrel_offset
= false;
5502 sec
= bfd_abs_section_ptr
;
5507 sec
= sections
[symndx
];
5508 /* Hack to make sure we use the right TOC anchor value
5509 if this reloc is against the TOC anchor. */
5510 if (sec
->name
[3] == '0'
5511 && strcmp (sec
->name
, ".tc0") == 0)
5512 val
= xcoff_data (output_bfd
)->toc
;
5514 val
= (sec
->output_section
->vma
5515 + sec
->output_offset
5522 if (h
->root
.type
== bfd_link_hash_defined
5523 || h
->root
.type
== bfd_link_hash_defweak
)
5527 sec
= h
->root
.u
.def
.section
;
5528 val
= (h
->root
.u
.def
.value
5529 + sec
->output_section
->vma
5530 + sec
->output_offset
);
5532 else if (h
->root
.type
== bfd_link_hash_common
)
5536 sec
= h
->root
.u
.c
.p
->section
;
5537 val
= (sec
->output_section
->vma
5538 + sec
->output_offset
);
5540 else if ((h
->flags
& XCOFF_DEF_DYNAMIC
) != 0
5541 || (h
->flags
& XCOFF_IMPORT
) != 0)
5543 /* Every symbol in a shared object is defined somewhere. */
5546 else if (! info
->relocateable
5549 if (! ((*info
->callbacks
->undefined_symbol
)
5550 (info
, h
->root
.root
.string
, input_bfd
, input_section
,
5551 rel
->r_vaddr
- input_section
->vma
)))
5556 /* I took the relocation type definitions from two documents:
5557 the PowerPC AIX Version 4 Application Binary Interface, First
5558 Edition (April 1992), and the PowerOpen ABI, Big-Endian
5559 32-Bit Hardware Implementation (June 30, 1994). Differences
5560 between the documents are noted below. */
5562 switch (rel
->r_type
)
5567 /* These relocs are defined by the PowerPC ABI to be
5568 relative branches which use half of the difference
5569 between the symbol and the program counter. I can't
5570 quite figure out when this is useful. These relocs are
5571 not defined by the PowerOpen ABI. */
5573 (*_bfd_error_handler
)
5574 ("%s: unsupported relocation type 0x%02x",
5575 bfd_get_filename (input_bfd
), (unsigned int) rel
->r_type
);
5576 bfd_set_error (bfd_error_bad_value
);
5579 /* Simple positive relocation. */
5582 /* Simple negative relocation. */
5586 /* Simple PC relative relocation. */
5587 howto
.pc_relative
= true;
5590 /* TOC relative relocation. The value in the instruction in
5591 the input file is the offset from the input file TOC to
5592 the desired location. We want the offset from the final
5593 TOC to the desired location. We have:
5598 so we must change insn by on - in.
5601 /* Global linkage relocation. The value of this relocation
5602 is the address of the entry in the TOC section. */
5604 /* Local object TOC address. I can't figure out the
5605 difference between this and case R_GL. */
5607 /* TOC relative relocation. A TOC relative load instruction
5608 which may be changed to a load address instruction.
5609 FIXME: We don't currently implement this optimization. */
5611 /* TOC relative relocation. This is a TOC relative load
5612 address instruction which may be changed to a load
5613 instruction. FIXME: I don't know if this is the correct
5615 if (h
!= NULL
&& h
->toc_section
== NULL
)
5617 (*_bfd_error_handler
)
5618 ("%s: TOC reloc at 0x%x to symbol `%s' with no TOC entry",
5619 bfd_get_filename (input_bfd
), rel
->r_vaddr
,
5620 h
->root
.root
.string
);
5621 bfd_set_error (bfd_error_bad_value
);
5626 BFD_ASSERT ((h
->flags
& XCOFF_SET_TOC
) == 0);
5627 val
= (h
->toc_section
->output_section
->vma
5628 + h
->toc_section
->output_offset
);
5630 val
= ((val
- xcoff_data (output_bfd
)->toc
)
5631 - (sym
->n_value
- xcoff_data (input_bfd
)->toc
));
5635 /* Absolute branch. We don't want to mess with the lower
5636 two bits of the instruction. */
5638 /* The PowerPC ABI defines this as an absolute call which
5639 may be modified to become a relative call. The PowerOpen
5640 ABI does not define this relocation type. */
5642 /* Absolute branch which may be modified to become a
5645 /* The PowerPC ABI defines this as an absolute branch to a
5646 fixed address which may be modified to an absolute branch
5647 to a symbol. The PowerOpen ABI does not define this
5650 /* The PowerPC ABI defines this as an absolute branch to a
5651 fixed address which may be modified to a relative branch.
5652 The PowerOpen ABI does not define this relocation type. */
5653 howto
.src_mask
&= ~3;
5654 howto
.dst_mask
= howto
.src_mask
;
5657 /* Relative branch. We don't want to mess with the lower
5658 two bits of the instruction. */
5660 /* The PowerPC ABI defines this as a relative call which may
5661 be modified to become an absolute call. The PowerOpen
5662 ABI does not define this relocation type. */
5664 /* A relative branch which may be modified to become an
5665 absolute branch. FIXME: We don't implement this,
5666 although we should for symbols of storage mapping class
5668 howto
.pc_relative
= true;
5669 howto
.src_mask
&= ~3;
5670 howto
.dst_mask
= howto
.src_mask
;
5673 /* The PowerPC AIX ABI describes this as a load which may be
5674 changed to a load address. The PowerOpen ABI says this
5675 is the same as case R_POS. */
5678 /* The PowerPC AIX ABI describes this as a load address
5679 which may be changed to a load. The PowerOpen ABI says
5680 this is the same as R_POS. */
5684 /* If we see an R_BR or R_RBR reloc which is jumping to global
5685 linkage code, and it is followed by an appropriate cror nop
5686 instruction, we replace the cror with lwz r2,20(r1). This
5687 restores the TOC after the glink code. Contrariwise, if the
5688 call is followed by a lwz r2,20(r1), but the call is not
5689 going to global linkage code, we can replace the load with a
5691 if ((rel
->r_type
== R_BR
|| rel
->r_type
== R_RBR
)
5693 && h
->root
.type
== bfd_link_hash_defined
5694 && (rel
->r_vaddr
- input_section
->vma
+ 8
5695 <= input_section
->_cooked_size
))
5700 pnext
= contents
+ (rel
->r_vaddr
- input_section
->vma
) + 4;
5701 next
= bfd_get_32 (input_bfd
, pnext
);
5702 if (h
->smclas
== XMC_GL
)
5704 if (next
== 0x4def7b82 /* cror 15,15,15 */
5705 || next
== 0x4ffffb82) /* cror 31,31,31 */
5706 bfd_put_32 (input_bfd
, 0x80410014, pnext
); /* lwz r1,20(r1) */
5710 if (next
== 0x80410014) /* lwz r1,20(r1) */
5711 bfd_put_32 (input_bfd
, 0x4ffffb82, pnext
); /* cror 31,31,31 */
5715 /* A PC relative reloc includes the section address. */
5716 if (howto
.pc_relative
)
5717 addend
+= input_section
->vma
;
5719 rstat
= _bfd_final_link_relocate (&howto
, input_bfd
, input_section
,
5721 rel
->r_vaddr
- input_section
->vma
,
5730 case bfd_reloc_overflow
:
5733 char buf
[SYMNMLEN
+ 1];
5734 char howto_name
[10];
5739 name
= h
->root
.root
.string
;
5742 name
= _bfd_coff_internal_syment_name (input_bfd
, sym
, buf
);
5746 sprintf (howto_name
, "0x%02x", rel
->r_type
);
5748 if (! ((*info
->callbacks
->reloc_overflow
)
5749 (info
, name
, howto_name
, (bfd_vma
) 0, input_bfd
,
5750 input_section
, rel
->r_vaddr
- input_section
->vma
)))