1 /* BFD COFF object file private structure.
2 Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 98, 1999
3 Free Software Foundation, Inc.
4 Written by Cygnus Support.
6 ** NOTE: libcoff.h is a GENERATED file. Don't change it; instead,
7 ** change libcoff-in.h or coffcode.h.
9 This file is part of BFD, the Binary File Descriptor library.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 /* Object file tdata; access macros */
29 #define coff_data(bfd) ((bfd)->tdata.coff_obj_data)
30 #define exec_hdr(bfd) (coff_data(bfd)->hdr)
31 #define obj_pe(bfd) (coff_data(bfd)->pe)
32 #define obj_symbols(bfd) (coff_data(bfd)->symbols)
33 #define obj_sym_filepos(bfd) (coff_data(bfd)->sym_filepos)
35 #define obj_relocbase(bfd) (coff_data(bfd)->relocbase)
36 #define obj_raw_syments(bfd) (coff_data(bfd)->raw_syments)
37 #define obj_raw_syment_count(bfd) (coff_data(bfd)->raw_syment_count)
38 #define obj_convert(bfd) (coff_data(bfd)->conversion_table)
39 #define obj_conv_table_size(bfd) (coff_data(bfd)->conv_table_size)
41 #define obj_coff_external_syms(bfd) (coff_data (bfd)->external_syms)
42 #define obj_coff_keep_syms(bfd) (coff_data (bfd)->keep_syms)
43 #define obj_coff_strings(bfd) (coff_data (bfd)->strings)
44 #define obj_coff_keep_strings(bfd) (coff_data (bfd)->keep_strings)
45 #define obj_coff_sym_hashes(bfd) (coff_data (bfd)->sym_hashes)
47 #define obj_coff_local_toc_table(bfd) (coff_data(bfd)->local_toc_sym_map)
49 /* `Tdata' information kept for COFF files. */
51 typedef struct coff_tdata
53 struct coff_symbol_struct *symbols; /* symtab for input bfd */
54 unsigned int *conversion_table;
58 struct coff_ptr_struct *raw_syments;
59 unsigned long raw_syment_count;
61 /* These are only valid once writing has begun */
64 /* These members communicate important constants about the symbol table
65 to GDB's symbol-reading code. These `constants' unfortunately vary
66 from coff implementation to implementation... */
67 unsigned local_n_btmask;
68 unsigned local_n_btshft;
69 unsigned local_n_tmask;
70 unsigned local_n_tshift;
71 unsigned local_symesz;
72 unsigned local_auxesz;
73 unsigned local_linesz;
75 /* The unswapped external symbols. May be NULL. Read by
76 _bfd_coff_get_external_symbols. */
78 /* If this is true, the external_syms may not be freed. */
81 /* The string table. May be NULL. Read by
82 _bfd_coff_read_string_table. */
84 /* If this is true, the strings may not be freed. */
87 /* is this a PE format coff file */
89 /* Used by the COFF backend linker. */
90 struct coff_link_hash_entry **sym_hashes;
92 /* used by the pe linker for PowerPC */
93 int *local_toc_sym_map;
95 struct bfd_link_info *link_info;
97 /* Used by coff_find_nearest_line. */
100 /* The timestamp from the COFF file header. */
103 /* Copy of some of the f_flags bits in the COFF filehdr structure,
109 /* Tdata for pe image files. */
110 typedef struct pe_tdata
113 struct internal_extra_pe_aouthdr pe_opthdr;
115 int has_reloc_section;
116 boolean (*in_reloc_p) PARAMS((bfd *, reloc_howto_type *));
120 #define pe_data(bfd) ((bfd)->tdata.pe_obj_data)
122 /* Tdata for XCOFF files. */
126 /* Basic COFF information. */
129 /* True if this is an XCOFF64 file. */
132 /* True if a large a.out header should be generated. */
133 boolean full_aouthdr;
138 /* Index of section holding TOC. */
141 /* Index of section holding entry point. */
144 /* .text alignment from optional header. */
145 int text_align_power;
147 /* .data alignment from optional header. */
148 int data_align_power;
150 /* modtype from optional header. */
153 /* cputype from optional header. */
156 /* maxdata from optional header. */
157 bfd_size_type maxdata;
159 /* maxstack from optional header. */
160 bfd_size_type maxstack;
162 /* Used by the XCOFF backend linker. */
164 unsigned long *debug_indices;
165 unsigned int import_file_id;
168 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
170 /* We take the address of the first element of a asymbol to ensure that the
171 * macro is only ever applied to an asymbol. */
172 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
174 /* The used_by_bfd field of a section may be set to a pointer to this
177 struct coff_section_tdata
179 /* The relocs, swapped into COFF internal form. This may be NULL. */
180 struct internal_reloc *relocs;
181 /* If this is true, the relocs entry may not be freed. */
183 /* The section contents. This may be NULL. */
185 /* If this is true, the contents entry may not be freed. */
186 boolean keep_contents;
187 /* Information cached by coff_find_nearest_line. */
190 const char *function;
192 /* A pointer used for .stab linking optimizations. */
194 /* Available for individual backends. */
198 /* An accessor macro for the coff_section_tdata structure. */
199 #define coff_section_data(abfd, sec) \
200 ((struct coff_section_tdata *) (sec)->used_by_bfd)
202 /* Tdata for sections in XCOFF files. This is used by the linker. */
204 struct xcoff_section_tdata
206 /* Used for XCOFF csects created by the linker; points to the real
207 XCOFF section which contains this csect. */
209 /* The lineno_count field for the enclosing section, because we are
210 going to clobber it there. */
211 unsigned int lineno_count;
212 /* The first and one past the last symbol indices for symbols used
214 unsigned long first_symndx;
215 unsigned long last_symndx;
218 /* An accessor macro the xcoff_section_tdata structure. */
219 #define xcoff_section_data(abfd, sec) \
220 ((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
222 /* Tdata for sections in PE files. */
224 struct pei_section_tdata
226 /* The virtual size of the section. */
227 bfd_size_type virt_size;
228 /* The PE section flags. */
232 /* An accessor macro for the pei_section_tdata structure. */
233 #define pei_section_data(abfd, sec) \
234 ((struct pei_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
236 /* COFF linker hash table entries. */
238 struct coff_link_hash_entry
240 struct bfd_link_hash_entry root;
242 /* Symbol index in output file. Set to -1 initially. Set to -2 if
243 there is a reloc against this symbol. */
252 /* Number of auxiliary entries. */
255 /* BFD to take auxiliary entries from. */
258 /* Pointer to array of auxiliary entries, if any. */
259 union internal_auxent *aux;
261 /* Flag word; legal values follow. */
262 unsigned short coff_link_hash_flags;
263 /* Symbol is a PE section symbol. */
264 #define COFF_LINK_HASH_PE_SECTION_SYMBOL (01)
267 /* COFF linker hash table. */
269 struct coff_link_hash_table
271 struct bfd_link_hash_table root;
272 /* A pointer to information used to link stabs in sections. */
276 /* Look up an entry in a COFF linker hash table. */
278 #define coff_link_hash_lookup(table, string, create, copy, follow) \
279 ((struct coff_link_hash_entry *) \
280 bfd_link_hash_lookup (&(table)->root, (string), (create), \
283 /* Traverse a COFF linker hash table. */
285 #define coff_link_hash_traverse(table, func, info) \
286 (bfd_link_hash_traverse \
288 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
291 /* Get the COFF linker hash table from a link_info structure. */
293 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
295 /* Functions in coffgen.c. */
296 extern const bfd_target *coff_object_p PARAMS ((bfd *));
297 extern struct sec *coff_section_from_bfd_index PARAMS ((bfd *, int));
298 extern long coff_get_symtab_upper_bound PARAMS ((bfd *));
299 extern long coff_get_symtab PARAMS ((bfd *, asymbol **));
300 extern int coff_count_linenumbers PARAMS ((bfd *));
301 extern struct coff_symbol_struct *coff_symbol_from PARAMS ((bfd *, asymbol *));
302 extern boolean coff_renumber_symbols PARAMS ((bfd *, int *));
303 extern void coff_mangle_symbols PARAMS ((bfd *));
304 extern boolean coff_write_symbols PARAMS ((bfd *));
305 extern boolean coff_write_linenumbers PARAMS ((bfd *));
306 extern alent *coff_get_lineno PARAMS ((bfd *, asymbol *));
307 extern asymbol *coff_section_symbol PARAMS ((bfd *, char *));
308 extern boolean _bfd_coff_get_external_symbols PARAMS ((bfd *));
309 extern const char *_bfd_coff_read_string_table PARAMS ((bfd *));
310 extern boolean _bfd_coff_free_symbols PARAMS ((bfd *));
311 extern struct coff_ptr_struct *coff_get_normalized_symtab PARAMS ((bfd *));
312 extern long coff_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
313 extern asymbol *coff_make_empty_symbol PARAMS ((bfd *));
314 extern void coff_print_symbol PARAMS ((bfd *, PTR filep, asymbol *,
315 bfd_print_symbol_type how));
316 extern void coff_get_symbol_info PARAMS ((bfd *, asymbol *,
318 extern boolean _bfd_coff_is_local_label_name PARAMS ((bfd *, const char *));
319 extern asymbol *coff_bfd_make_debug_symbol PARAMS ((bfd *, PTR,
321 extern boolean coff_find_nearest_line PARAMS ((bfd *,
325 CONST char **filename_ptr,
326 CONST char **functionname_ptr,
327 unsigned int *line_ptr));
328 extern int coff_sizeof_headers PARAMS ((bfd *, boolean reloc));
329 extern boolean bfd_coff_reloc16_relax_section
330 PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
331 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
332 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
333 bfd_byte *, boolean relocateable, asymbol **));
334 extern bfd_vma bfd_coff_reloc16_get_value PARAMS ((arelent *,
335 struct bfd_link_info *,
337 extern void bfd_perform_slip PARAMS ((bfd *abfd, unsigned int slip,
338 asection *input_section,
341 /* Functions and types in cofflink.c. */
343 #define STRING_SIZE_SIZE (4)
345 /* We use a hash table to merge identical enum, struct, and union
346 definitions in the linker. */
348 /* Information we keep for a single element (an enum value, a
349 structure or union field) in the debug merge hash table. */
351 struct coff_debug_merge_element
354 struct coff_debug_merge_element *next;
362 /* Symbol index for complex type. */
366 /* A linked list of debug merge entries for a given name. */
368 struct coff_debug_merge_type
370 /* Next type with the same name. */
371 struct coff_debug_merge_type *next;
376 /* Symbol index where this type is defined. */
379 /* List of elements. */
380 struct coff_debug_merge_element *elements;
383 /* Information we store in the debug merge hash table. */
385 struct coff_debug_merge_hash_entry
387 struct bfd_hash_entry root;
389 /* A list of types with this name. */
390 struct coff_debug_merge_type *types;
393 /* The debug merge hash table. */
395 struct coff_debug_merge_hash_table
397 struct bfd_hash_table root;
400 /* Initialize a COFF debug merge hash table. */
402 #define coff_debug_merge_hash_table_init(table) \
403 (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc))
405 /* Free a COFF debug merge hash table. */
407 #define coff_debug_merge_hash_table_free(table) \
408 (bfd_hash_table_free (&(table)->root))
410 /* Look up an entry in a COFF debug merge hash table. */
412 #define coff_debug_merge_hash_lookup(table, string, create, copy) \
413 ((struct coff_debug_merge_hash_entry *) \
414 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
416 /* Information we keep for each section in the output file when doing
417 a relocateable link. */
419 struct coff_link_section_info
421 /* The relocs to be output. */
422 struct internal_reloc *relocs;
423 /* For each reloc against a global symbol whose index was not known
424 when the reloc was handled, the global hash table entry. */
425 struct coff_link_hash_entry **rel_hashes;
428 /* Information that we pass around while doing the final link step. */
430 struct coff_final_link_info
432 /* General link information. */
433 struct bfd_link_info *info;
436 /* Used to indicate failure in traversal routine. */
438 /* If doing "task linking" set only during the time when we want the
439 global symbol writer to convert the storage class of defined global
440 symbols from global to static. */
441 boolean global_to_static;
442 /* Hash table for long symbol names. */
443 struct bfd_strtab_hash *strtab;
444 /* When doing a relocateable link, an array of information kept for
445 each output section, indexed by the target_index field. */
446 struct coff_link_section_info *section_info;
447 /* Symbol index of last C_FILE symbol (-1 if none). */
448 long last_file_index;
449 /* Contents of last C_FILE symbol. */
450 struct internal_syment last_file;
451 /* Symbol index of first aux entry of last .bf symbol with an empty
452 endndx field (-1 if none). */
454 /* Contents of last_bf_index aux entry. */
455 union internal_auxent last_bf;
456 /* Hash table used to merge debug information. */
457 struct coff_debug_merge_hash_table debug_merge;
458 /* Buffer large enough to hold swapped symbols of any input file. */
459 struct internal_syment *internal_syms;
460 /* Buffer large enough to hold sections of symbols of any input file. */
462 /* Buffer large enough to hold output indices of symbols of any
465 /* Buffer large enough to hold output symbols for any input file. */
467 /* Buffer large enough to hold external line numbers for any input
470 /* Buffer large enough to hold any input section. */
472 /* Buffer large enough to hold external relocs of any input section. */
473 bfd_byte *external_relocs;
474 /* Buffer large enough to hold swapped relocs of any input section. */
475 struct internal_reloc *internal_relocs;
478 /* Most COFF variants have no way to record the alignment of a
479 section. This struct is used to set a specific alignment based on
480 the name of the section. */
482 struct coff_section_alignment_entry
484 /* The section name. */
487 /* This is either (unsigned int) -1, indicating that the section
488 name must match exactly, or it is the number of letters which
489 must match at the start of the name. */
490 unsigned int comparison_length;
492 /* These macros may be used to fill in the first two fields in a
493 structure initialization. */
494 #define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
495 #define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
497 /* Only use this entry if the default section alignment for this
498 target is at least that much (as a power of two). If this field
499 is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
500 unsigned int default_alignment_min;
502 /* Only use this entry if the default section alignment for this
503 target is no greater than this (as a power of two). If this
504 field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
505 unsigned int default_alignment_max;
507 #define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
509 /* The desired alignment for this section (as a power of two). */
510 unsigned int alignment_power;
513 extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
514 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
515 extern boolean _bfd_coff_link_hash_table_init
516 PARAMS ((struct coff_link_hash_table *, bfd *,
517 struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
518 struct bfd_hash_table *,
520 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
522 extern const char *_bfd_coff_internal_syment_name
523 PARAMS ((bfd *, const struct internal_syment *, char *));
524 extern boolean _bfd_coff_link_add_symbols
525 PARAMS ((bfd *, struct bfd_link_info *));
526 extern boolean _bfd_coff_final_link
527 PARAMS ((bfd *, struct bfd_link_info *));
528 extern struct internal_reloc *_bfd_coff_read_internal_relocs
529 PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
530 struct internal_reloc *));
531 extern boolean _bfd_coff_generic_relocate_section
532 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
533 struct internal_reloc *, struct internal_syment *, asection **));
535 extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc
536 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
537 extern boolean _bfd_coff_write_global_sym
538 PARAMS ((struct coff_link_hash_entry *, PTR));
539 extern boolean _bfd_coff_write_task_globals
540 PARAMS ((struct coff_link_hash_entry *, PTR));
541 extern boolean _bfd_coff_link_input_bfd
542 PARAMS ((struct coff_final_link_info *, bfd *));
543 extern boolean _bfd_coff_reloc_link_order
544 PARAMS ((bfd *, struct coff_final_link_info *, asection *,
545 struct bfd_link_order *));
548 #define coff_get_section_contents_in_window \
549 _bfd_generic_get_section_contents_in_window
551 /* Functions in xcofflink.c. */
553 extern long _bfd_xcoff_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
554 extern long _bfd_xcoff_canonicalize_dynamic_symtab
555 PARAMS ((bfd *, asymbol **));
556 extern long _bfd_xcoff_get_dynamic_reloc_upper_bound PARAMS ((bfd *));
557 extern long _bfd_xcoff_canonicalize_dynamic_reloc
558 PARAMS ((bfd *, arelent **, asymbol **));
559 extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
561 extern boolean _bfd_xcoff_bfd_link_add_symbols
562 PARAMS ((bfd *, struct bfd_link_info *));
563 extern boolean _bfd_xcoff_bfd_final_link
564 PARAMS ((bfd *, struct bfd_link_info *));
565 extern boolean _bfd_ppc_xcoff_relocate_section
566 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
567 struct internal_reloc *, struct internal_syment *, asection **));
569 /* Functions in coff-ppc.c. FIXME: These are called be pe.em in the
570 linker, and so should start with bfd and be declared in bfd.h. */
572 extern boolean ppc_allocate_toc_section PARAMS ((struct bfd_link_info *));
573 extern boolean ppc_process_before_allocation
574 PARAMS ((bfd *, struct bfd_link_info *));
576 /* And more taken from the source .. */