1 /* BFD COFF object file private structure.
2 Copyright (C) 1990-2015 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 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., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
29 /* Object file tdata; access macros. */
31 #define coff_data(bfd) ((bfd)->tdata.coff_obj_data)
32 #define obj_pe(bfd) (coff_data (bfd)->pe)
33 #define obj_symbols(bfd) (coff_data (bfd)->symbols)
34 #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)
40 #define obj_coff_external_syms(bfd) (coff_data (bfd)->external_syms)
41 #define obj_coff_keep_syms(bfd) (coff_data (bfd)->keep_syms)
42 #define obj_coff_strings(bfd) (coff_data (bfd)->strings)
43 #define obj_coff_strings_len(bfd) (coff_data (bfd)->strings_len)
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)
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. */
62 unsigned long int relocbase
;
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. */
79 bfd_boolean keep_syms
;
81 /* The string table. May be NULL. Read by
82 _bfd_coff_read_string_table. */
84 /* The length of the strings table. For error checking. */
85 bfd_size_type strings_len
;
86 /* If this is TRUE, the strings may not be freed. */
87 bfd_boolean keep_strings
;
88 /* If this is TRUE, the strings have been written out already. */
89 bfd_boolean strings_written
;
91 /* Is this a PE format coff file? */
93 /* Used by the COFF backend linker. */
94 struct coff_link_hash_entry
**sym_hashes
;
96 /* Used by the pe linker for PowerPC. */
97 int *local_toc_sym_map
;
99 struct bfd_link_info
*link_info
;
101 /* Used by coff_find_nearest_line. */
104 /* A place to stash dwarf2 info for this bfd. */
105 void * dwarf2_find_line_info
;
107 /* The timestamp from the COFF file header. */
110 /* Copy of some of the f_flags bits in the COFF filehdr structure,
114 /* coff-stgo32 EXE stub header after BFD tdata has been allocated. Its data
115 is kept in internal_filehdr.go32stub beforehand. */
119 /* Tdata for pe image files. */
120 typedef struct pe_tdata
123 struct internal_extra_pe_aouthdr pe_opthdr
;
125 int has_reloc_section
;
126 int dont_strip_reloc
;
127 bfd_boolean insert_timestamp
;
128 bfd_boolean (*in_reloc_p
) (bfd
*, reloc_howto_type
*);
134 bfd_boolean (*after_write_object_contents
) (bfd
*);
140 #define pe_data(bfd) ((bfd)->tdata.pe_obj_data)
142 /* Tdata for XCOFF files. */
146 /* Basic COFF information. */
149 /* TRUE if this is an XCOFF64 file. */
152 /* TRUE if a large a.out header should be generated. */
153 bfd_boolean full_aouthdr
;
158 /* Index of section holding TOC. */
161 /* Index of section holding entry point. */
164 /* .text alignment from optional header. */
165 int text_align_power
;
167 /* .data alignment from optional header. */
168 int data_align_power
;
170 /* modtype from optional header. */
173 /* cputype from optional header. */
176 /* maxdata from optional header. */
179 /* maxstack from optional header. */
182 /* Used by the XCOFF backend linker. */
185 unsigned int *lineno_counts
;
186 unsigned int import_file_id
;
189 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
191 /* We take the address of the first element of an asymbol to ensure that the
192 macro is only ever applied to an asymbol. */
193 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
195 /* Tdata for sections in XCOFF files. This is used by the linker. */
197 struct xcoff_section_tdata
199 /* Used for XCOFF csects created by the linker; points to the real
200 XCOFF section which contains this csect. */
202 /* The lineno_count field for the enclosing section, because we are
203 going to clobber it there. */
204 unsigned int lineno_count
;
205 /* The first and last symbol indices for symbols used by this csect. */
206 unsigned long first_symndx
;
207 unsigned long last_symndx
;
210 /* An accessor macro the xcoff_section_tdata structure. */
211 #define xcoff_section_data(abfd, sec) \
212 ((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
214 /* Tdata for sections in PE files. */
216 struct pei_section_tdata
218 /* The virtual size of the section. */
219 bfd_size_type virt_size
;
220 /* The PE section flags. */
224 /* An accessor macro for the pei_section_tdata structure. */
225 #define pei_section_data(abfd, sec) \
226 ((struct pei_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
228 /* COFF linker hash table entries. */
230 struct coff_link_hash_entry
232 struct bfd_link_hash_entry root
;
234 /* Symbol index in output file. Set to -1 initially. Set to -2 if
235 there is a reloc against this symbol. */
242 unsigned char symbol_class
;
244 /* Number of auxiliary entries. */
247 /* BFD to take auxiliary entries from. */
250 /* Pointer to array of auxiliary entries, if any. */
251 union internal_auxent
*aux
;
253 /* Flag word; legal values follow. */
254 unsigned short coff_link_hash_flags
;
255 /* Symbol is a PE section symbol. */
256 #define COFF_LINK_HASH_PE_SECTION_SYMBOL (01)
259 /* COFF linker hash table. */
261 struct coff_link_hash_table
263 struct bfd_link_hash_table root
;
264 /* A pointer to information used to link stabs in sections. */
265 struct stab_info stab_info
;
268 /* Look up an entry in a COFF linker hash table. */
270 #define coff_link_hash_lookup(table, string, create, copy, follow) \
271 ((struct coff_link_hash_entry *) \
272 bfd_link_hash_lookup (&(table)->root, (string), (create), \
275 /* Traverse a COFF linker hash table. */
277 #define coff_link_hash_traverse(table, func, info) \
278 (bfd_link_hash_traverse \
280 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
283 /* Get the COFF linker hash table from a link_info structure. */
285 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
287 /* Functions in coffgen.c. */
288 extern const bfd_target
*coff_object_p
290 extern struct bfd_section
*coff_section_from_bfd_index
292 extern long coff_get_symtab_upper_bound
294 extern long coff_canonicalize_symtab
296 extern int coff_count_linenumbers
298 extern bfd_boolean coff_renumber_symbols
300 extern void coff_mangle_symbols
302 extern bfd_boolean coff_write_symbols
304 extern bfd_boolean coff_write_alien_symbol
305 (bfd
*, asymbol
*, struct internal_syment
*, bfd_vma
*,
306 bfd_size_type
*, asection
**, bfd_size_type
*);
307 extern bfd_boolean coff_write_linenumbers
309 extern alent
*coff_get_lineno
311 extern asymbol
*coff_section_symbol
313 extern bfd_boolean _bfd_coff_get_external_symbols
315 extern const char *_bfd_coff_read_string_table
317 extern bfd_boolean _bfd_coff_free_symbols
319 extern struct coff_ptr_struct
*coff_get_normalized_symtab
321 extern long coff_get_reloc_upper_bound
323 extern asymbol
*coff_make_empty_symbol
325 extern void coff_print_symbol
326 (bfd
*, void * filep
, asymbol
*, bfd_print_symbol_type
);
327 extern void coff_get_symbol_info
328 (bfd
*, asymbol
*, symbol_info
*ret
);
329 #define coff_get_symbol_version_string \
330 _bfd_nosymbols_get_symbol_version_string
331 extern bfd_boolean _bfd_coff_is_local_label_name
332 (bfd
*, const char *);
333 extern asymbol
*coff_bfd_make_debug_symbol
334 (bfd
*, void *, unsigned long);
335 extern bfd_boolean coff_find_nearest_line
336 (bfd
*, asymbol
**, asection
*, bfd_vma
,
337 const char **, const char **, unsigned int *, unsigned int *);
338 #define coff_find_line _bfd_nosymbols_find_line
339 struct dwarf_debug_section
;
340 extern bfd_boolean coff_find_nearest_line_with_names
341 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **,
342 unsigned int *, const struct dwarf_debug_section
*);
343 extern bfd_boolean coff_find_inliner_info
344 (bfd
*, const char **, const char **, unsigned int *);
345 extern int coff_sizeof_headers
346 (bfd
*, struct bfd_link_info
*);
347 extern bfd_boolean bfd_coff_reloc16_relax_section
348 (bfd
*, asection
*, struct bfd_link_info
*, bfd_boolean
*);
349 extern bfd_byte
*bfd_coff_reloc16_get_relocated_section_contents
350 (bfd
*, struct bfd_link_info
*, struct bfd_link_order
*,
351 bfd_byte
*, bfd_boolean
, asymbol
**);
352 extern bfd_vma bfd_coff_reloc16_get_value
353 (arelent
*, struct bfd_link_info
*, asection
*);
354 extern void bfd_perform_slip
355 (bfd
*, unsigned int, asection
*, bfd_vma
);
357 /* Functions and types in cofflink.c. */
359 #define STRING_SIZE_SIZE 4
361 /* We use a hash table to merge identical enum, struct, and union
362 definitions in the linker. */
364 /* Information we keep for a single element (an enum value, a
365 structure or union field) in the debug merge hash table. */
367 struct coff_debug_merge_element
370 struct coff_debug_merge_element
*next
;
378 /* Symbol index for complex type. */
382 /* A linked list of debug merge entries for a given name. */
384 struct coff_debug_merge_type
386 /* Next type with the same name. */
387 struct coff_debug_merge_type
*next
;
392 /* Symbol index where this type is defined. */
395 /* List of elements. */
396 struct coff_debug_merge_element
*elements
;
399 /* Information we store in the debug merge hash table. */
401 struct coff_debug_merge_hash_entry
403 struct bfd_hash_entry root
;
405 /* A list of types with this name. */
406 struct coff_debug_merge_type
*types
;
409 /* The debug merge hash table. */
411 struct coff_debug_merge_hash_table
413 struct bfd_hash_table root
;
416 /* Initialize a COFF debug merge hash table. */
418 #define coff_debug_merge_hash_table_init(table) \
419 (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc, \
420 sizeof (struct coff_debug_merge_hash_entry)))
422 /* Free a COFF debug merge hash table. */
424 #define coff_debug_merge_hash_table_free(table) \
425 (bfd_hash_table_free (&(table)->root))
427 /* Look up an entry in a COFF debug merge hash table. */
429 #define coff_debug_merge_hash_lookup(table, string, create, copy) \
430 ((struct coff_debug_merge_hash_entry *) \
431 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
433 /* Information we keep for each section in the output file when doing
434 a relocatable link. */
436 struct coff_link_section_info
438 /* The relocs to be output. */
439 struct internal_reloc
*relocs
;
440 /* For each reloc against a global symbol whose index was not known
441 when the reloc was handled, the global hash table entry. */
442 struct coff_link_hash_entry
**rel_hashes
;
445 /* Information that we pass around while doing the final link step. */
447 struct coff_final_link_info
449 /* General link information. */
450 struct bfd_link_info
*info
;
453 /* Used to indicate failure in traversal routine. */
455 /* If doing "task linking" set only during the time when we want the
456 global symbol writer to convert the storage class of defined global
457 symbols from global to static. */
458 bfd_boolean global_to_static
;
459 /* Hash table for long symbol names. */
460 struct bfd_strtab_hash
*strtab
;
461 /* When doing a relocatable link, an array of information kept for
462 each output section, indexed by the target_index field. */
463 struct coff_link_section_info
*section_info
;
464 /* Symbol index of last C_FILE symbol (-1 if none). */
465 long last_file_index
;
466 /* Contents of last C_FILE symbol. */
467 struct internal_syment last_file
;
468 /* Symbol index of first aux entry of last .bf symbol with an empty
469 endndx field (-1 if none). */
471 /* Contents of last_bf_index aux entry. */
472 union internal_auxent last_bf
;
473 /* Hash table used to merge debug information. */
474 struct coff_debug_merge_hash_table debug_merge
;
475 /* Buffer large enough to hold swapped symbols of any input file. */
476 struct internal_syment
*internal_syms
;
477 /* Buffer large enough to hold sections of symbols of any input file. */
479 /* Buffer large enough to hold output indices of symbols of any
482 /* Buffer large enough to hold output symbols for any input file. */
484 /* Buffer large enough to hold external line numbers for any input
487 /* Buffer large enough to hold any input section. */
489 /* Buffer large enough to hold external relocs of any input section. */
490 bfd_byte
*external_relocs
;
491 /* Buffer large enough to hold swapped relocs of any input section. */
492 struct internal_reloc
*internal_relocs
;
495 /* Most COFF variants have no way to record the alignment of a
496 section. This struct is used to set a specific alignment based on
497 the name of the section. */
499 struct coff_section_alignment_entry
501 /* The section name. */
504 /* This is either (unsigned int) -1, indicating that the section
505 name must match exactly, or it is the number of letters which
506 must match at the start of the name. */
507 unsigned int comparison_length
;
509 /* These macros may be used to fill in the first two fields in a
510 structure initialization. */
511 #define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
512 #define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
514 /* Only use this entry if the default section alignment for this
515 target is at least that much (as a power of two). If this field
516 is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
517 unsigned int default_alignment_min
;
519 /* Only use this entry if the default section alignment for this
520 target is no greater than this (as a power of two). If this
521 field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
522 unsigned int default_alignment_max
;
524 #define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
526 /* The desired alignment for this section (as a power of two). */
527 unsigned int alignment_power
;
530 extern struct bfd_hash_entry
*_bfd_coff_link_hash_newfunc
531 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
532 extern bfd_boolean _bfd_coff_link_hash_table_init
533 (struct coff_link_hash_table
*, bfd
*,
534 struct bfd_hash_entry
*(*) (struct bfd_hash_entry
*,
535 struct bfd_hash_table
*,
538 extern struct bfd_link_hash_table
*_bfd_coff_link_hash_table_create
540 extern const char *_bfd_coff_internal_syment_name
541 (bfd
*, const struct internal_syment
*, char *);
542 extern bfd_boolean _bfd_coff_section_already_linked
543 (bfd
*, asection
*, struct bfd_link_info
*);
544 extern bfd_boolean _bfd_coff_link_add_symbols
545 (bfd
*, struct bfd_link_info
*);
546 extern bfd_boolean _bfd_coff_final_link
547 (bfd
*, struct bfd_link_info
*);
548 extern struct internal_reloc
*_bfd_coff_read_internal_relocs
549 (bfd
*, asection
*, bfd_boolean
, bfd_byte
*, bfd_boolean
,
550 struct internal_reloc
*);
551 extern bfd_boolean _bfd_coff_generic_relocate_section
552 (bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
553 struct internal_reloc
*, struct internal_syment
*, asection
**);
554 extern struct bfd_hash_entry
*_bfd_coff_debug_merge_hash_newfunc
555 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
556 extern bfd_boolean _bfd_coff_write_global_sym
557 (struct bfd_hash_entry
*, void *);
558 extern bfd_boolean _bfd_coff_write_task_globals
559 (struct coff_link_hash_entry
*, void *);
560 extern bfd_boolean _bfd_coff_link_input_bfd
561 (struct coff_final_link_info
*, bfd
*);
562 extern bfd_boolean _bfd_coff_reloc_link_order
563 (bfd
*, struct coff_final_link_info
*, asection
*,
564 struct bfd_link_order
*);
567 #define coff_get_section_contents_in_window \
568 _bfd_generic_get_section_contents_in_window
570 /* Functions in xcofflink.c. */
572 extern long _bfd_xcoff_get_dynamic_symtab_upper_bound
574 extern long _bfd_xcoff_canonicalize_dynamic_symtab
576 extern long _bfd_xcoff_get_dynamic_reloc_upper_bound
578 extern long _bfd_xcoff_canonicalize_dynamic_reloc
579 (bfd
*, arelent
**, asymbol
**);
580 extern struct bfd_link_hash_table
*_bfd_xcoff_bfd_link_hash_table_create
582 extern bfd_boolean _bfd_xcoff_bfd_link_add_symbols
583 (bfd
*, struct bfd_link_info
*);
584 extern bfd_boolean _bfd_xcoff_bfd_final_link
585 (bfd
*, struct bfd_link_info
*);
586 extern bfd_boolean _bfd_xcoff_define_common_symbol
587 (bfd
*, struct bfd_link_info
*, struct bfd_link_hash_entry
*);
588 extern bfd_boolean _bfd_ppc_xcoff_relocate_section
589 (bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
590 struct internal_reloc
*, struct internal_syment
*, asection
**);
592 /* Functions in coff-ppc.c. FIXME: These are called by pe.em in the
593 linker, and so should start with bfd and be declared in bfd.h. */
595 extern bfd_boolean ppc_allocate_toc_section
596 (struct bfd_link_info
*);
597 extern bfd_boolean ppc_process_before_allocation
598 (bfd
*, struct bfd_link_info
*);