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)
46 #define obj_coff_strings_written(bfd) (coff_data (bfd)->strings_written)
48 #define obj_coff_local_toc_table(bfd) (coff_data(bfd)->local_toc_sym_map)
50 /* `Tdata' information kept for COFF files. */
52 typedef struct coff_tdata
54 struct coff_symbol_struct *symbols; /* symtab for input bfd */
55 unsigned int *conversion_table;
59 struct coff_ptr_struct *raw_syments;
60 unsigned long raw_syment_count;
62 /* These are only valid once writing has begun */
65 /* These members communicate important constants about the symbol table
66 to GDB's symbol-reading code. These `constants' unfortunately vary
67 from coff implementation to implementation... */
68 unsigned local_n_btmask;
69 unsigned local_n_btshft;
70 unsigned local_n_tmask;
71 unsigned local_n_tshift;
72 unsigned local_symesz;
73 unsigned local_auxesz;
74 unsigned local_linesz;
76 /* The unswapped external symbols. May be NULL. Read by
77 _bfd_coff_get_external_symbols. */
79 /* If this is true, the external_syms may not be freed. */
82 /* The string table. May be NULL. Read by
83 _bfd_coff_read_string_table. */
85 /* If this is true, the strings may not be freed. */
87 /* If this is true, the strings have been written out already. */
88 boolean strings_written;
90 /* is this a PE format coff file */
92 /* Used by the COFF backend linker. */
93 struct coff_link_hash_entry **sym_hashes;
95 /* used by the pe linker for PowerPC */
96 int *local_toc_sym_map;
98 struct bfd_link_info *link_info;
100 /* Used by coff_find_nearest_line. */
103 /* A place to stash dwarf2 info for this bfd. */
104 PTR dwarf2_find_line_info;
106 /* The timestamp from the COFF file header. */
109 /* Copy of some of the f_flags bits in the COFF filehdr structure,
115 /* Tdata for pe image files. */
116 typedef struct pe_tdata
119 struct internal_extra_pe_aouthdr pe_opthdr;
121 int has_reloc_section;
122 boolean (*in_reloc_p) PARAMS((bfd *, reloc_howto_type *));
126 #define pe_data(bfd) ((bfd)->tdata.pe_obj_data)
128 /* Tdata for XCOFF files. */
132 /* Basic COFF information. */
135 /* True if this is an XCOFF64 file. */
138 /* True if a large a.out header should be generated. */
139 boolean full_aouthdr;
144 /* Index of section holding TOC. */
147 /* Index of section holding entry point. */
150 /* .text alignment from optional header. */
151 int text_align_power;
153 /* .data alignment from optional header. */
154 int data_align_power;
156 /* modtype from optional header. */
159 /* cputype from optional header. */
162 /* maxdata from optional header. */
163 bfd_size_type maxdata;
165 /* maxstack from optional header. */
166 bfd_size_type maxstack;
168 /* Used by the XCOFF backend linker. */
170 unsigned long *debug_indices;
171 unsigned int import_file_id;
174 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
176 /* We take the address of the first element of a asymbol to ensure that the
177 * macro is only ever applied to an asymbol. */
178 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
180 /* The used_by_bfd field of a section may be set to a pointer to this
183 struct coff_section_tdata
185 /* The relocs, swapped into COFF internal form. This may be NULL. */
186 struct internal_reloc *relocs;
187 /* If this is true, the relocs entry may not be freed. */
189 /* The section contents. This may be NULL. */
191 /* If this is true, the contents entry may not be freed. */
192 boolean keep_contents;
193 /* Information cached by coff_find_nearest_line. */
196 const char *function;
198 /* A pointer used for .stab linking optimizations. */
200 /* Available for individual backends. */
204 /* An accessor macro for the coff_section_tdata structure. */
205 #define coff_section_data(abfd, sec) \
206 ((struct coff_section_tdata *) (sec)->used_by_bfd)
208 /* Tdata for sections in XCOFF files. This is used by the linker. */
210 struct xcoff_section_tdata
212 /* Used for XCOFF csects created by the linker; points to the real
213 XCOFF section which contains this csect. */
215 /* The lineno_count field for the enclosing section, because we are
216 going to clobber it there. */
217 unsigned int lineno_count;
218 /* The first and one past the last symbol indices for symbols used
220 unsigned long first_symndx;
221 unsigned long last_symndx;
224 /* An accessor macro the xcoff_section_tdata structure. */
225 #define xcoff_section_data(abfd, sec) \
226 ((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
228 /* Tdata for sections in PE files. */
230 struct pei_section_tdata
232 /* The virtual size of the section. */
233 bfd_size_type virt_size;
234 /* The PE section flags. */
238 /* An accessor macro for the pei_section_tdata structure. */
239 #define pei_section_data(abfd, sec) \
240 ((struct pei_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
242 /* COFF linker hash table entries. */
244 struct coff_link_hash_entry
246 struct bfd_link_hash_entry root;
248 /* Symbol index in output file. Set to -1 initially. Set to -2 if
249 there is a reloc against this symbol. */
258 /* Number of auxiliary entries. */
261 /* BFD to take auxiliary entries from. */
264 /* Pointer to array of auxiliary entries, if any. */
265 union internal_auxent *aux;
267 /* Flag word; legal values follow. */
268 unsigned short coff_link_hash_flags;
269 /* Symbol is a PE section symbol. */
270 #define COFF_LINK_HASH_PE_SECTION_SYMBOL (01)
273 /* COFF linker hash table. */
275 struct coff_link_hash_table
277 struct bfd_link_hash_table root;
278 /* A pointer to information used to link stabs in sections. */
282 /* Look up an entry in a COFF linker hash table. */
284 #define coff_link_hash_lookup(table, string, create, copy, follow) \
285 ((struct coff_link_hash_entry *) \
286 bfd_link_hash_lookup (&(table)->root, (string), (create), \
289 /* Traverse a COFF linker hash table. */
291 #define coff_link_hash_traverse(table, func, info) \
292 (bfd_link_hash_traverse \
294 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
297 /* Get the COFF linker hash table from a link_info structure. */
299 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
301 /* Functions in coffgen.c. */
302 extern const bfd_target *coff_object_p PARAMS ((bfd *));
303 extern struct sec *coff_section_from_bfd_index PARAMS ((bfd *, int));
304 extern long coff_get_symtab_upper_bound PARAMS ((bfd *));
305 extern long coff_get_symtab PARAMS ((bfd *, asymbol **));
306 extern int coff_count_linenumbers PARAMS ((bfd *));
307 extern struct coff_symbol_struct *coff_symbol_from PARAMS ((bfd *, asymbol *));
308 extern boolean coff_renumber_symbols PARAMS ((bfd *, int *));
309 extern void coff_mangle_symbols PARAMS ((bfd *));
310 extern boolean coff_write_symbols PARAMS ((bfd *));
311 extern boolean coff_write_linenumbers PARAMS ((bfd *));
312 extern alent *coff_get_lineno PARAMS ((bfd *, asymbol *));
313 extern asymbol *coff_section_symbol PARAMS ((bfd *, char *));
314 extern boolean _bfd_coff_get_external_symbols PARAMS ((bfd *));
315 extern const char *_bfd_coff_read_string_table PARAMS ((bfd *));
316 extern boolean _bfd_coff_free_symbols PARAMS ((bfd *));
317 extern struct coff_ptr_struct *coff_get_normalized_symtab PARAMS ((bfd *));
318 extern long coff_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
319 extern asymbol *coff_make_empty_symbol PARAMS ((bfd *));
320 extern void coff_print_symbol PARAMS ((bfd *, PTR filep, asymbol *,
321 bfd_print_symbol_type how));
322 extern void coff_get_symbol_info PARAMS ((bfd *, asymbol *,
324 extern boolean _bfd_coff_is_local_label_name PARAMS ((bfd *, const char *));
325 extern asymbol *coff_bfd_make_debug_symbol PARAMS ((bfd *, PTR,
327 extern boolean coff_find_nearest_line PARAMS ((bfd *,
331 CONST char **filename_ptr,
332 CONST char **functionname_ptr,
333 unsigned int *line_ptr));
334 extern int coff_sizeof_headers PARAMS ((bfd *, boolean reloc));
335 extern boolean bfd_coff_reloc16_relax_section
336 PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
337 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
338 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
339 bfd_byte *, boolean relocateable, asymbol **));
340 extern bfd_vma bfd_coff_reloc16_get_value PARAMS ((arelent *,
341 struct bfd_link_info *,
343 extern void bfd_perform_slip PARAMS ((bfd *abfd, unsigned int slip,
344 asection *input_section,
347 /* Functions and types in cofflink.c. */
349 #define STRING_SIZE_SIZE (4)
351 /* We use a hash table to merge identical enum, struct, and union
352 definitions in the linker. */
354 /* Information we keep for a single element (an enum value, a
355 structure or union field) in the debug merge hash table. */
357 struct coff_debug_merge_element
360 struct coff_debug_merge_element *next;
368 /* Symbol index for complex type. */
372 /* A linked list of debug merge entries for a given name. */
374 struct coff_debug_merge_type
376 /* Next type with the same name. */
377 struct coff_debug_merge_type *next;
382 /* Symbol index where this type is defined. */
385 /* List of elements. */
386 struct coff_debug_merge_element *elements;
389 /* Information we store in the debug merge hash table. */
391 struct coff_debug_merge_hash_entry
393 struct bfd_hash_entry root;
395 /* A list of types with this name. */
396 struct coff_debug_merge_type *types;
399 /* The debug merge hash table. */
401 struct coff_debug_merge_hash_table
403 struct bfd_hash_table root;
406 /* Initialize a COFF debug merge hash table. */
408 #define coff_debug_merge_hash_table_init(table) \
409 (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc))
411 /* Free a COFF debug merge hash table. */
413 #define coff_debug_merge_hash_table_free(table) \
414 (bfd_hash_table_free (&(table)->root))
416 /* Look up an entry in a COFF debug merge hash table. */
418 #define coff_debug_merge_hash_lookup(table, string, create, copy) \
419 ((struct coff_debug_merge_hash_entry *) \
420 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
422 /* Information we keep for each section in the output file when doing
423 a relocateable link. */
425 struct coff_link_section_info
427 /* The relocs to be output. */
428 struct internal_reloc *relocs;
429 /* For each reloc against a global symbol whose index was not known
430 when the reloc was handled, the global hash table entry. */
431 struct coff_link_hash_entry **rel_hashes;
434 /* Information that we pass around while doing the final link step. */
436 struct coff_final_link_info
438 /* General link information. */
439 struct bfd_link_info *info;
442 /* Used to indicate failure in traversal routine. */
444 /* If doing "task linking" set only during the time when we want the
445 global symbol writer to convert the storage class of defined global
446 symbols from global to static. */
447 boolean global_to_static;
448 /* Hash table for long symbol names. */
449 struct bfd_strtab_hash *strtab;
450 /* When doing a relocateable link, an array of information kept for
451 each output section, indexed by the target_index field. */
452 struct coff_link_section_info *section_info;
453 /* Symbol index of last C_FILE symbol (-1 if none). */
454 long last_file_index;
455 /* Contents of last C_FILE symbol. */
456 struct internal_syment last_file;
457 /* Symbol index of first aux entry of last .bf symbol with an empty
458 endndx field (-1 if none). */
460 /* Contents of last_bf_index aux entry. */
461 union internal_auxent last_bf;
462 /* Hash table used to merge debug information. */
463 struct coff_debug_merge_hash_table debug_merge;
464 /* Buffer large enough to hold swapped symbols of any input file. */
465 struct internal_syment *internal_syms;
466 /* Buffer large enough to hold sections of symbols of any input file. */
468 /* Buffer large enough to hold output indices of symbols of any
471 /* Buffer large enough to hold output symbols for any input file. */
473 /* Buffer large enough to hold external line numbers for any input
476 /* Buffer large enough to hold any input section. */
478 /* Buffer large enough to hold external relocs of any input section. */
479 bfd_byte *external_relocs;
480 /* Buffer large enough to hold swapped relocs of any input section. */
481 struct internal_reloc *internal_relocs;
484 /* Most COFF variants have no way to record the alignment of a
485 section. This struct is used to set a specific alignment based on
486 the name of the section. */
488 struct coff_section_alignment_entry
490 /* The section name. */
493 /* This is either (unsigned int) -1, indicating that the section
494 name must match exactly, or it is the number of letters which
495 must match at the start of the name. */
496 unsigned int comparison_length;
498 /* These macros may be used to fill in the first two fields in a
499 structure initialization. */
500 #define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
501 #define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
503 /* Only use this entry if the default section alignment for this
504 target is at least that much (as a power of two). If this field
505 is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
506 unsigned int default_alignment_min;
508 /* Only use this entry if the default section alignment for this
509 target is no greater than this (as a power of two). If this
510 field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
511 unsigned int default_alignment_max;
513 #define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
515 /* The desired alignment for this section (as a power of two). */
516 unsigned int alignment_power;
519 extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
520 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
521 extern boolean _bfd_coff_link_hash_table_init
522 PARAMS ((struct coff_link_hash_table *, bfd *,
523 struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
524 struct bfd_hash_table *,
526 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
528 extern const char *_bfd_coff_internal_syment_name
529 PARAMS ((bfd *, const struct internal_syment *, char *));
530 extern boolean _bfd_coff_link_add_symbols
531 PARAMS ((bfd *, struct bfd_link_info *));
532 extern boolean _bfd_coff_final_link
533 PARAMS ((bfd *, struct bfd_link_info *));
534 extern struct internal_reloc *_bfd_coff_read_internal_relocs
535 PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
536 struct internal_reloc *));
537 extern boolean _bfd_coff_generic_relocate_section
538 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
539 struct internal_reloc *, struct internal_syment *, asection **));
541 extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc
542 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
543 extern boolean _bfd_coff_write_global_sym
544 PARAMS ((struct coff_link_hash_entry *, PTR));
545 extern boolean _bfd_coff_write_task_globals
546 PARAMS ((struct coff_link_hash_entry *, PTR));
547 extern boolean _bfd_coff_link_input_bfd
548 PARAMS ((struct coff_final_link_info *, bfd *));
549 extern boolean _bfd_coff_reloc_link_order
550 PARAMS ((bfd *, struct coff_final_link_info *, asection *,
551 struct bfd_link_order *));
554 #define coff_get_section_contents_in_window \
555 _bfd_generic_get_section_contents_in_window
557 /* Functions in xcofflink.c. */
559 extern long _bfd_xcoff_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
560 extern long _bfd_xcoff_canonicalize_dynamic_symtab
561 PARAMS ((bfd *, asymbol **));
562 extern long _bfd_xcoff_get_dynamic_reloc_upper_bound PARAMS ((bfd *));
563 extern long _bfd_xcoff_canonicalize_dynamic_reloc
564 PARAMS ((bfd *, arelent **, asymbol **));
565 extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
567 extern boolean _bfd_xcoff_bfd_link_add_symbols
568 PARAMS ((bfd *, struct bfd_link_info *));
569 extern boolean _bfd_xcoff_bfd_final_link
570 PARAMS ((bfd *, struct bfd_link_info *));
571 extern boolean _bfd_ppc_xcoff_relocate_section
572 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
573 struct internal_reloc *, struct internal_syment *, asection **));
575 /* Functions in coff-ppc.c. FIXME: These are called be pe.em in the
576 linker, and so should start with bfd and be declared in bfd.h. */
578 extern boolean ppc_allocate_toc_section PARAMS ((struct bfd_link_info *));
579 extern boolean ppc_process_before_allocation
580 PARAMS ((bfd *, struct bfd_link_info *));
582 /* And more taken from the source .. */