xref: /netbsd-src/external/gpl3/binutils/dist/bfd/libcoff-in.h (revision cb63e24e8d6aae7ddac1859a9015f48b1d8bd90e)
1 /* BFD COFF object file private structure.
2    Copyright (C) 1990-2024 Free Software Foundation, Inc.
3    Written by Cygnus Support.
4 
5    This file is part of BFD, the Binary File Descriptor library.
6 
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 3 of the License, or
10    (at your option) any later version.
11 
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.
16 
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., 51 Franklin Street - Fifth Floor, Boston,
20    MA 02110-1301, USA.  */
21 
22 #ifndef _LIBCOFF_H
23 #define _LIBCOFF_H 1
24 
25 #include "bfdlink.h"
26 #include "coff-bfd.h"
27 #include "hashtab.h"
28 
29 #ifdef __cplusplus
30 extern "C" {
31 #endif
32 
33 /* Object file tdata; access macros.  */
34 
35 #define coff_data(bfd)		      ((bfd)->tdata.coff_obj_data)
36 #define obj_pe(bfd)		      (coff_data (bfd)->pe)
37 #define obj_go32(bfd)		      (coff_data (bfd)->go32)
38 #define obj_symbols(bfd)	      (coff_data (bfd)->symbols)
39 #define obj_sym_filepos(bfd)	      (coff_data (bfd)->sym_filepos)
40 #define obj_relocbase(bfd)	      (coff_data (bfd)->relocbase)
41 #define obj_raw_syments(bfd)	      (coff_data (bfd)->raw_syments)
42 #define obj_raw_syment_count(bfd)     (coff_data (bfd)->raw_syment_count)
43 #define obj_convert(bfd)	      (coff_data (bfd)->conversion_table)
44 #define obj_conv_table_size(bfd)      (coff_data (bfd)->conv_table_size)
45 #define obj_coff_external_syms(bfd)   (coff_data (bfd)->external_syms)
46 #define obj_coff_keep_syms(bfd)	      (coff_data (bfd)->keep_syms)
47 #define obj_coff_strings(bfd)	      (coff_data (bfd)->strings)
48 #define obj_coff_strings_len(bfd)     (coff_data (bfd)->strings_len)
49 #define obj_coff_keep_strings(bfd)    (coff_data (bfd)->keep_strings)
50 #define obj_coff_sym_hashes(bfd)      (coff_data (bfd)->sym_hashes)
51 #define obj_coff_strings_written(bfd) (coff_data (bfd)->strings_written)
52 #define obj_coff_local_toc_table(bfd) (coff_data (bfd)->local_toc_sym_map)
53 
54 /* `Tdata' information kept for COFF files.  */
55 
56 typedef struct coff_tdata
57 {
58   struct coff_symbol_struct *symbols;	/* Symtab for input bfd.  */
59   unsigned int *conversion_table;
60   int conv_table_size;
61   file_ptr sym_filepos;
62 
63   struct coff_ptr_struct *raw_syments;
64   unsigned long raw_syment_count;
65 
66   /* These are only valid once writing has begun.  */
67   unsigned long int relocbase;
68 
69   /* These members communicate important constants about the symbol table
70      to GDB's symbol-reading code.  These `constants' unfortunately vary
71      from coff implementation to implementation...  */
72   unsigned local_n_btmask;
73   unsigned local_n_btshft;
74   unsigned local_n_tmask;
75   unsigned local_n_tshift;
76   unsigned local_symesz;
77   unsigned local_auxesz;
78   unsigned local_linesz;
79 
80   /* The unswapped external symbols.  May be NULL.  Read by
81      _bfd_coff_get_external_symbols.  */
82   void * external_syms;
83 
84   /* The string table.  May be NULL.  Read by
85      _bfd_coff_read_string_table.  */
86   char *strings;
87   /* The length of the strings table.  For error checking.  */
88   bfd_size_type strings_len;
89 
90   /* Set if long section names are supported.  A writable copy of the COFF
91      backend flag _bfd_coff_long_section_names.  */
92   bool long_section_names;
93 
94   /* If this is TRUE, the external_syms may not be freed.  */
95   bool keep_syms;
96   /* If this is TRUE, the strings may not be freed.  */
97   bool keep_strings;
98   /* If this is TRUE, the strings have been written out already.  */
99   bool strings_written;
100 
101   /* Is this a GO32 coff file?  */
102   bool go32;
103 
104   /* Is this a PE format coff file?  */
105   bool pe;
106 
107   /* Copy of some of the f_flags bits in the COFF filehdr structure,
108      used by ARM code.  */
109   flagword flags;
110 
111   /* Used by the COFF backend linker.  */
112   struct coff_link_hash_entry **sym_hashes;
113 
114   /* Used by the pe linker for PowerPC.  */
115   int *local_toc_sym_map;
116 
117   struct bfd_link_info *link_info;
118 
119   /* Used by coff_find_nearest_line.  */
120   void * line_info;
121 
122   /* A place to stash dwarf2 info for this bfd.  */
123   void * dwarf2_find_line_info;
124 
125   /* The timestamp from the COFF file header.  */
126   long timestamp;
127 
128   /* A stub (extra data prepended before the COFF image) and its size.
129      Used by coff-go32-exe, it contains executable data that loads the
130      COFF object into memory.  */
131   char * stub;
132   bfd_size_type stub_size;
133 
134   /* Hash table containing sections by target index.  */
135   htab_t section_by_target_index;
136 
137   /* Hash table containing sections by index.  */
138   htab_t section_by_index;
139 
140 } coff_data_type;
141 
142 /* Tdata for pe image files.  */
143 typedef struct pe_tdata
144 {
145   coff_data_type coff;
146   struct internal_extra_pe_aouthdr pe_opthdr;
147   int dll;
148   int has_reloc_section;
149   int dont_strip_reloc;
150   char dos_message[64];
151   /* The timestamp to insert into the output file.
152      If the timestamp is -1 then the current time is used.  */
153   int timestamp;
154   bool (*in_reloc_p) (bfd *, reloc_howto_type *);
155   flagword real_flags;
156 
157   /* Build-id info.  */
158   struct
159   {
160     bool (*after_write_object_contents) (bfd *);
161     const char *style;
162     asection *sec;
163   } build_id;
164 
165   htab_t comdat_hash;
166 } pe_data_type;
167 
168 #define pe_data(bfd)		((bfd)->tdata.pe_obj_data)
169 
170 struct comdat_hash_entry
171 {
172   int target_index;
173   struct internal_syment isym;
174   char *symname;
175   flagword sec_flags;
176   char *comdat_name;
177   long comdat_symbol;
178 };
179 
180 /* Tdata for XCOFF files.  */
181 
182 struct xcoff_tdata
183 {
184   /* Basic COFF information.  */
185   coff_data_type coff;
186 
187   /* TRUE if this is an XCOFF64 file. */
188   bool xcoff64;
189 
190   /* TRUE if a large a.out header should be generated.  */
191   bool full_aouthdr;
192 
193   /* TOC value.  */
194   bfd_vma toc;
195 
196   /* Index of section holding TOC.  */
197   int sntoc;
198 
199   /* Index of section holding entry point.  */
200   int snentry;
201 
202   /* .text alignment from optional header.  */
203   int text_align_power;
204 
205   /* .data alignment from optional header.  */
206   int data_align_power;
207 
208   /* modtype from optional header.  */
209   short modtype;
210 
211   /* cputype from optional header.  */
212   short cputype;
213 
214   /* maxdata from optional header.  */
215   bfd_vma maxdata;
216 
217   /* maxstack from optional header.  */
218   bfd_vma maxstack;
219 
220   /* Used by the XCOFF backend linker.  */
221   asection **csects;
222   long *debug_indices;
223   unsigned int *lineno_counts;
224   unsigned int import_file_id;
225 };
226 
227 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
228 
229 /* We take the address of the first element of an asymbol to ensure that the
230    macro is only ever applied to an asymbol.  */
231 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
232 
233 /* Tdata for sections in XCOFF files.  This is used by the linker.  */
234 
235 struct xcoff_section_tdata
236 {
237   /* Used for XCOFF csects created by the linker; points to the real
238      XCOFF section which contains this csect.  */
239   asection *enclosing;
240   /* The lineno_count field for the enclosing section, because we are
241      going to clobber it there.  */
242   unsigned int lineno_count;
243   /* The first and last symbol indices for symbols used by this csect.  */
244   unsigned long first_symndx;
245   unsigned long last_symndx;
246 };
247 
248 /* An accessor macro the xcoff_section_tdata structure.  */
249 #define xcoff_section_data(abfd, sec) \
250   ((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
251 
252 /* Tdata for sections in PE files.  */
253 
254 struct pei_section_tdata
255 {
256   /* The virtual size of the section.  */
257   bfd_size_type virt_size;
258   /* The PE section flags.  */
259   long pe_flags;
260 };
261 
262 /* An accessor macro for the pei_section_tdata structure.  */
263 #define pei_section_data(abfd, sec) \
264   ((struct pei_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
265 
266 /* COFF linker hash table entries.  */
267 
268 struct coff_link_hash_entry
269 {
270   struct bfd_link_hash_entry root;
271 
272   /* Symbol index in output file.  This is initialized to -1.  It is
273      set to -2 if the symbol is used by a reloc.  It is set to -3 if
274      this symbol is defined in a discarded section.  */
275   long indx;
276 
277   /* Symbol type.  */
278   unsigned short type;
279 
280   /* Symbol class.  */
281   unsigned char symbol_class;
282 
283   /* Number of auxiliary entries.  */
284   char numaux;
285 
286   /* BFD to take auxiliary entries from.  */
287   bfd *auxbfd;
288 
289   /* Pointer to array of auxiliary entries, if any.  */
290   union internal_auxent *aux;
291 
292   /* Flag word; legal values follow.  */
293   unsigned short coff_link_hash_flags;
294   /* Symbol is a PE section symbol.  */
295 #define COFF_LINK_HASH_PE_SECTION_SYMBOL (01)
296 };
297 
298 /* COFF linker hash table.  */
299 
300 struct coff_link_hash_table
301 {
302   struct bfd_link_hash_table root;
303   /* A pointer to information used to link stabs in sections.  */
304   struct stab_info stab_info;
305   /* Hash table that maps undecorated names to their respective
306    * decorated coff_link_hash_entry as found in fixup_stdcalls  */
307   struct bfd_hash_table decoration_hash;
308 };
309 
310 struct coff_reloc_cookie
311 {
312   struct internal_reloc *	  rels;
313   struct internal_reloc *	  rel;
314   struct internal_reloc *	  relend;
315   struct coff_symbol_struct *	  symbols;	/* Symtab for input bfd.  */
316   bfd *				  abfd;
317   struct coff_link_hash_entry **  sym_hashes;
318 };
319 
320 /* Look up an entry in a COFF linker hash table.  */
321 
322 #define coff_link_hash_lookup(table, string, create, copy, follow)	\
323   ((struct coff_link_hash_entry *)					\
324    bfd_link_hash_lookup (&(table)->root, (string), (create),		\
325 			 (copy), (follow)))
326 
327 /* Traverse a COFF linker hash table.  */
328 
329 #define coff_link_hash_traverse(table, func, info)			\
330   (bfd_link_hash_traverse						\
331    (&(table)->root,							\
332     (bool (*) (struct bfd_link_hash_entry *, void *)) (func),		\
333     (info)))
334 
335 /* Get the COFF linker hash table from a link_info structure.  */
336 
337 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
338 
339 struct decoration_hash_entry
340 {
341   struct bfd_hash_entry root;
342   struct bfd_link_hash_entry *decorated_link;
343 };
344 
345 /* Functions in coffgen.c.  */
346 extern void coff_object_cleanup
347   (bfd *);
348 extern bfd_cleanup coff_real_object_p
349   (bfd *, unsigned, struct internal_filehdr *, struct internal_aouthdr *);
350 extern bfd_cleanup coff_object_p
351   (bfd *);
352 extern struct bfd_section *coff_section_from_bfd_index
353   (bfd *, int);
354 extern long coff_get_symtab_upper_bound
355   (bfd *);
356 extern long coff_canonicalize_symtab
357   (bfd *, asymbol **);
358 extern int coff_count_linenumbers
359   (bfd *);
360 extern bool coff_renumber_symbols
361   (bfd *, int *);
362 extern void coff_mangle_symbols
363   (bfd *);
364 extern bool coff_write_symbols
365   (bfd *);
366 extern bool coff_write_alien_symbol
367   (bfd *, asymbol *, struct internal_syment *, bfd_vma *,
368    struct bfd_strtab_hash *, bool, asection **, bfd_size_type *);
369 extern bool coff_write_linenumbers
370   (bfd *);
371 extern alent *coff_get_lineno
372   (bfd *, asymbol *);
373 extern asymbol *coff_section_symbol
374   (bfd *, char *);
375 extern bool _bfd_coff_get_external_symbols
376   (bfd *);
377 extern const char *_bfd_coff_read_string_table
378   (bfd *);
379 extern bool _bfd_coff_free_symbols
380   (bfd *);
381 extern struct coff_ptr_struct *coff_get_normalized_symtab
382   (bfd *);
383 extern long coff_get_reloc_upper_bound
384   (bfd *, sec_ptr);
385 extern asymbol *coff_make_empty_symbol
386   (bfd *);
387 extern void coff_print_symbol
388   (bfd *, void * filep, asymbol *, bfd_print_symbol_type);
389 extern void coff_get_symbol_info
390   (bfd *, asymbol *, symbol_info *ret);
391 #define coff_get_symbol_version_string \
392   _bfd_nosymbols_get_symbol_version_string
393 extern bool _bfd_coff_is_local_label_name
394   (bfd *, const char *);
395 extern asymbol *coff_bfd_make_debug_symbol
396   (bfd *);
397 extern bool coff_find_nearest_line
398   (bfd *, asymbol **, asection *, bfd_vma,
399    const char **, const char **, unsigned int *, unsigned int *);
400 #define coff_find_nearest_line_with_alt \
401   _bfd_nosymbols_find_nearest_line_with_alt
402 #define coff_find_line _bfd_nosymbols_find_line
403 struct dwarf_debug_section;
404 extern bool coff_find_nearest_line_with_names
405   (bfd *, asymbol **, asection *, bfd_vma, const char **, const char **,
406    unsigned int *, const struct dwarf_debug_section *);
407 extern bool coff_find_inliner_info
408   (bfd *, const char **, const char **, unsigned int *);
409 extern int coff_sizeof_headers
410   (bfd *, struct bfd_link_info *);
411 extern bool bfd_coff_reloc16_relax_section
412   (bfd *, asection *, struct bfd_link_info *, bool *);
413 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
414   (bfd *, struct bfd_link_info *, struct bfd_link_order *,
415    bfd_byte *, bool, asymbol **);
416 extern bfd_vma bfd_coff_reloc16_get_value
417   (arelent *, struct bfd_link_info *, asection *);
418 extern void bfd_perform_slip
419   (bfd *, unsigned int, asection *, bfd_vma);
420 extern bool _bfd_coff_free_cached_info
421   (bfd *);
422 
423 /* Functions and types in cofflink.c.  */
424 
425 #define STRING_SIZE_SIZE 4
426 
427 /* We use a hash table to merge identical enum, struct, and union
428    definitions in the linker.  */
429 
430 /* Information we keep for a single element (an enum value, a
431    structure or union field) in the debug merge hash table.  */
432 
433 struct coff_debug_merge_element
434 {
435   /* Next element.  */
436   struct coff_debug_merge_element *next;
437 
438   /* Name.  */
439   const char *name;
440 
441   /* Type.  */
442   unsigned int type;
443 
444   /* Symbol index for complex type.  */
445   long tagndx;
446 };
447 
448 /* A linked list of debug merge entries for a given name.  */
449 
450 struct coff_debug_merge_type
451 {
452   /* Next type with the same name.  */
453   struct coff_debug_merge_type *next;
454 
455   /* Class of type.  */
456   int type_class;
457 
458   /* Symbol index where this type is defined.  */
459   long indx;
460 
461   /* List of elements.  */
462   struct coff_debug_merge_element *elements;
463 };
464 
465 /* Information we store in the debug merge hash table.  */
466 
467 struct coff_debug_merge_hash_entry
468 {
469   struct bfd_hash_entry root;
470 
471   /* A list of types with this name.  */
472   struct coff_debug_merge_type *types;
473 };
474 
475 /* The debug merge hash table.  */
476 
477 struct coff_debug_merge_hash_table
478 {
479   struct bfd_hash_table root;
480 };
481 
482 /* Initialize a COFF debug merge hash table.  */
483 
484 #define coff_debug_merge_hash_table_init(table) \
485   (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc, \
486 			sizeof (struct coff_debug_merge_hash_entry)))
487 
488 /* Free a COFF debug merge hash table.  */
489 
490 #define coff_debug_merge_hash_table_free(table) \
491   (bfd_hash_table_free (&(table)->root))
492 
493 /* Look up an entry in a COFF debug merge hash table.  */
494 
495 #define coff_debug_merge_hash_lookup(table, string, create, copy) \
496   ((struct coff_debug_merge_hash_entry *) \
497    bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
498 
499 /* Information we keep for each section in the output file when doing
500    a relocatable link.  */
501 
502 struct coff_link_section_info
503 {
504   /* The relocs to be output.  */
505   struct internal_reloc *relocs;
506   /* For each reloc against a global symbol whose index was not known
507      when the reloc was handled, the global hash table entry.  */
508   struct coff_link_hash_entry **rel_hashes;
509 };
510 
511 /* Information that we pass around while doing the final link step.  */
512 
513 struct coff_final_link_info
514 {
515   /* General link information.  */
516   struct bfd_link_info *info;
517   /* Output BFD.  */
518   bfd *output_bfd;
519   /* Used to indicate failure in traversal routine.  */
520   bool failed;
521   /* If doing "task linking" set only during the time when we want the
522      global symbol writer to convert the storage class of defined global
523      symbols from global to static. */
524   bool global_to_static;
525   /* Hash table for long symbol names.  */
526   struct bfd_strtab_hash *strtab;
527   /* When doing a relocatable link, an array of information kept for
528      each output section, indexed by the target_index field.  */
529   struct coff_link_section_info *section_info;
530   /* Symbol index of last C_FILE symbol (-1 if none).  */
531   long last_file_index;
532   /* Contents of last C_FILE symbol.  */
533   struct internal_syment last_file;
534   /* Symbol index of first aux entry of last .bf symbol with an empty
535      endndx field (-1 if none).  */
536   long last_bf_index;
537   /* Contents of last_bf_index aux entry.  */
538   union internal_auxent last_bf;
539   /* Hash table used to merge debug information.  */
540   struct coff_debug_merge_hash_table debug_merge;
541   /* Buffer large enough to hold swapped symbols of any input file.  */
542   struct internal_syment *internal_syms;
543   /* Buffer large enough to hold sections of symbols of any input file.  */
544   asection **sec_ptrs;
545   /* Buffer large enough to hold output indices of symbols of any
546      input file.  */
547   long *sym_indices;
548   /* Buffer large enough to hold output symbols for any input file.  */
549   bfd_byte *outsyms;
550   /* Buffer large enough to hold external line numbers for any input
551      section.  */
552   bfd_byte *linenos;
553   /* Buffer large enough to hold any input section.  */
554   bfd_byte *contents;
555   /* Buffer large enough to hold external relocs of any input section.  */
556   bfd_byte *external_relocs;
557   /* Buffer large enough to hold swapped relocs of any input section.  */
558   struct internal_reloc *internal_relocs;
559 };
560 
561 /* Most COFF variants have no way to record the alignment of a
562    section.  This struct is used to set a specific alignment based on
563    the name of the section.  */
564 
565 struct coff_section_alignment_entry
566 {
567   /* The section name.  */
568   const char *name;
569 
570   /* This is either (unsigned int) -1, indicating that the section
571      name must match exactly, or it is the number of letters which
572      must match at the start of the name.  */
573   unsigned int comparison_length;
574 
575   /* These macros may be used to fill in the first two fields in a
576      structure initialization.  */
577 #define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
578 #define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
579 
580   /* Only use this entry if the default section alignment for this
581      target is at least that much (as a power of two).  If this field
582      is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
583   unsigned int default_alignment_min;
584 
585   /* Only use this entry if the default section alignment for this
586      target is no greater than this (as a power of two).  If this
587      field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
588   unsigned int default_alignment_max;
589 
590 #define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
591 
592   /* The desired alignment for this section (as a power of two).  */
593   unsigned int alignment_power;
594 };
595 
596 extern struct bfd_hash_entry *_decoration_hash_newfunc
597   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
598 extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
599   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
600 extern bool _bfd_coff_link_hash_table_init
601   (struct coff_link_hash_table *, bfd *,
602    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
603 			       struct bfd_hash_table *,
604 			       const char *),
605    unsigned int);
606 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
607   (bfd *);
608 extern const char *_bfd_coff_internal_syment_name
609   (bfd *, const struct internal_syment *, char *);
610 extern bool _bfd_coff_section_already_linked
611   (bfd *, asection *, struct bfd_link_info *);
612 extern bool _bfd_coff_link_add_symbols
613   (bfd *, struct bfd_link_info *);
614 extern bool _bfd_coff_final_link
615   (bfd *, struct bfd_link_info *);
616 extern struct internal_reloc *_bfd_coff_read_internal_relocs
617   (bfd *, asection *, bool, bfd_byte *, bool,
618    struct internal_reloc *);
619 extern bool _bfd_coff_generic_relocate_section
620   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
621    struct internal_reloc *, struct internal_syment *, asection **);
622 extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc
623   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
624 extern bool _bfd_coff_write_global_sym
625   (struct bfd_hash_entry *, void *);
626 extern bool _bfd_coff_write_task_globals
627   (struct coff_link_hash_entry *, void *);
628 extern bool _bfd_coff_link_input_bfd
629   (struct coff_final_link_info *, bfd *);
630 extern bool _bfd_coff_reloc_link_order
631   (bfd *, struct coff_final_link_info *, asection *,
632    struct bfd_link_order *);
633 extern bool bfd_coff_gc_sections
634   (bfd *, struct bfd_link_info *);
635 extern const char *bfd_coff_group_name
636   (bfd *, const asection *);
637 
638 #define coff_get_section_contents_in_window \
639   _bfd_generic_get_section_contents_in_window
640 
641 /* Functions in xcofflink.c.  */
642 
643 extern long _bfd_xcoff_get_dynamic_symtab_upper_bound
644   (bfd *);
645 extern long _bfd_xcoff_canonicalize_dynamic_symtab
646   (bfd *, asymbol **);
647 extern long _bfd_xcoff_get_dynamic_reloc_upper_bound
648   (bfd *);
649 extern long _bfd_xcoff_canonicalize_dynamic_reloc
650   (bfd *, arelent **, asymbol **);
651 extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
652   (bfd *);
653 extern bool _bfd_xcoff_bfd_link_add_symbols
654   (bfd *, struct bfd_link_info *);
655 extern bool _bfd_xcoff_bfd_final_link
656   (bfd *, struct bfd_link_info *);
657 extern bool _bfd_xcoff_define_common_symbol
658   (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *);
659 extern bool _bfd_ppc_xcoff_relocate_section
660   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
661    struct internal_reloc *, struct internal_syment *, asection **);
662