libcoff-in.h revision 77298
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. 5 6** NOTE: libcoff.h is a GENERATED file. Don't change it; instead, 7** change libcoff-in.h or coffcode.h. 8 9This file is part of BFD, the Binary File Descriptor library. 10 11This program is free software; you can redistribute it and/or modify 12it under the terms of the GNU General Public License as published by 13the Free Software Foundation; either version 2 of the License, or 14(at your option) any later version. 15 16This program is distributed in the hope that it will be useful, 17but WITHOUT ANY WARRANTY; without even the implied warranty of 18MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19GNU General Public License for more details. 20 21You should have received a copy of the GNU General Public License 22along with this program; if not, write to the Free Software 23Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 24 25#include "bfdlink.h" 26 27/* Object file tdata; access macros */ 28 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) 34 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 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) 47 48#define obj_coff_local_toc_table(bfd) (coff_data(bfd)->local_toc_sym_map) 49 50/* `Tdata' information kept for COFF files. */ 51 52typedef struct coff_tdata 53{ 54 struct coff_symbol_struct *symbols; /* symtab for input bfd */ 55 unsigned int *conversion_table; 56 int conv_table_size; 57 file_ptr sym_filepos; 58 59 struct coff_ptr_struct *raw_syments; 60 unsigned long raw_syment_count; 61 62 /* These are only valid once writing has begun */ 63 long int relocbase; 64 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; 75 76 /* The unswapped external symbols. May be NULL. Read by 77 _bfd_coff_get_external_symbols. */ 78 PTR external_syms; 79 /* If this is true, the external_syms may not be freed. */ 80 boolean keep_syms; 81 82 /* The string table. May be NULL. Read by 83 _bfd_coff_read_string_table. */ 84 char *strings; 85 /* If this is true, the strings may not be freed. */ 86 boolean keep_strings; 87 /* If this is true, the strings have been written out already. */ 88 boolean strings_written; 89 90 /* is this a PE format coff file */ 91 int pe; 92 /* Used by the COFF backend linker. */ 93 struct coff_link_hash_entry **sym_hashes; 94 95 /* used by the pe linker for PowerPC */ 96 int *local_toc_sym_map; 97 98 struct bfd_link_info *link_info; 99 100 /* Used by coff_find_nearest_line. */ 101 PTR line_info; 102 103 /* A place to stash dwarf2 info for this bfd. */ 104 PTR dwarf2_find_line_info; 105 106 /* The timestamp from the COFF file header. */ 107 long timestamp; 108 109 /* Copy of some of the f_flags bits in the COFF filehdr structure, 110 used by ARM code. */ 111 flagword flags; 112 113} coff_data_type; 114 115/* Tdata for pe image files. */ 116typedef struct pe_tdata 117{ 118 coff_data_type coff; 119 struct internal_extra_pe_aouthdr pe_opthdr; 120 int dll; 121 int has_reloc_section; 122 boolean (*in_reloc_p) PARAMS((bfd *, reloc_howto_type *)); 123 flagword real_flags; 124} pe_data_type; 125 126#define pe_data(bfd) ((bfd)->tdata.pe_obj_data) 127 128/* Tdata for XCOFF files. */ 129 130struct xcoff_tdata 131{ 132 /* Basic COFF information. */ 133 coff_data_type coff; 134 135 /* True if this is an XCOFF64 file. */ 136 boolean xcoff64; 137 138 /* True if a large a.out header should be generated. */ 139 boolean full_aouthdr; 140 141 /* TOC value. */ 142 bfd_vma toc; 143 144 /* Index of section holding TOC. */ 145 int sntoc; 146 147 /* Index of section holding entry point. */ 148 int snentry; 149 150 /* .text alignment from optional header. */ 151 int text_align_power; 152 153 /* .data alignment from optional header. */ 154 int data_align_power; 155 156 /* modtype from optional header. */ 157 short modtype; 158 159 /* cputype from optional header. */ 160 short cputype; 161 162 /* maxdata from optional header. */ 163 bfd_size_type maxdata; 164 165 /* maxstack from optional header. */ 166 bfd_size_type maxstack; 167 168 /* Used by the XCOFF backend linker. */ 169 asection **csects; 170 unsigned long *debug_indices; 171 unsigned int import_file_id; 172}; 173 174#define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data) 175 176/* 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))) 179 180/* The used_by_bfd field of a section may be set to a pointer to this 181 structure. */ 182 183struct coff_section_tdata 184{ 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. */ 188 boolean keep_relocs; 189 /* The section contents. This may be NULL. */ 190 bfd_byte *contents; 191 /* If this is true, the contents entry may not be freed. */ 192 boolean keep_contents; 193 /* Information cached by coff_find_nearest_line. */ 194 bfd_vma offset; 195 unsigned int i; 196 const char *function; 197 int line_base; 198 /* A pointer used for .stab linking optimizations. */ 199 PTR stab_info; 200 /* Available for individual backends. */ 201 PTR tdata; 202}; 203 204/* 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) 207 208/* Tdata for sections in XCOFF files. This is used by the linker. */ 209 210struct xcoff_section_tdata 211{ 212 /* Used for XCOFF csects created by the linker; points to the real 213 XCOFF section which contains this csect. */ 214 asection *enclosing; 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 219 by this csect. */ 220 unsigned long first_symndx; 221 unsigned long last_symndx; 222}; 223 224/* 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) 227 228/* Tdata for sections in PE files. */ 229 230struct pei_section_tdata 231{ 232 /* The virtual size of the section. */ 233 bfd_size_type virt_size; 234 /* The PE section flags. */ 235 long pe_flags; 236}; 237 238/* 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) 241 242/* COFF linker hash table entries. */ 243 244struct coff_link_hash_entry 245{ 246 struct bfd_link_hash_entry root; 247 248 /* Symbol index in output file. Set to -1 initially. Set to -2 if 249 there is a reloc against this symbol. */ 250 long indx; 251 252 /* Symbol type. */ 253 unsigned short type; 254 255 /* Symbol class. */ 256 unsigned char class; 257 258 /* Number of auxiliary entries. */ 259 char numaux; 260 261 /* BFD to take auxiliary entries from. */ 262 bfd *auxbfd; 263 264 /* Pointer to array of auxiliary entries, if any. */ 265 union internal_auxent *aux; 266 267 /* 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) 271}; 272 273/* COFF linker hash table. */ 274 275struct coff_link_hash_table 276{ 277 struct bfd_link_hash_table root; 278 /* A pointer to information used to link stabs in sections. */ 279 PTR stab_info; 280}; 281 282/* Look up an entry in a COFF linker hash table. */ 283 284#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), \ 287 (copy), (follow))) 288 289/* Traverse a COFF linker hash table. */ 290 291#define coff_link_hash_traverse(table, func, info) \ 292 (bfd_link_hash_traverse \ 293 (&(table)->root, \ 294 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \ 295 (info))) 296 297/* Get the COFF linker hash table from a link_info structure. */ 298 299#define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash)) 300 301/* Functions in coffgen.c. */ 302extern const bfd_target *coff_object_p PARAMS ((bfd *)); 303extern struct sec *coff_section_from_bfd_index PARAMS ((bfd *, int)); 304extern long coff_get_symtab_upper_bound PARAMS ((bfd *)); 305extern long coff_get_symtab PARAMS ((bfd *, asymbol **)); 306extern int coff_count_linenumbers PARAMS ((bfd *)); 307extern struct coff_symbol_struct *coff_symbol_from PARAMS ((bfd *, asymbol *)); 308extern boolean coff_renumber_symbols PARAMS ((bfd *, int *)); 309extern void coff_mangle_symbols PARAMS ((bfd *)); 310extern boolean coff_write_symbols PARAMS ((bfd *)); 311extern boolean coff_write_linenumbers PARAMS ((bfd *)); 312extern alent *coff_get_lineno PARAMS ((bfd *, asymbol *)); 313extern asymbol *coff_section_symbol PARAMS ((bfd *, char *)); 314extern boolean _bfd_coff_get_external_symbols PARAMS ((bfd *)); 315extern const char *_bfd_coff_read_string_table PARAMS ((bfd *)); 316extern boolean _bfd_coff_free_symbols PARAMS ((bfd *)); 317extern struct coff_ptr_struct *coff_get_normalized_symtab PARAMS ((bfd *)); 318extern long coff_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr)); 319extern asymbol *coff_make_empty_symbol PARAMS ((bfd *)); 320extern void coff_print_symbol PARAMS ((bfd *, PTR filep, asymbol *, 321 bfd_print_symbol_type how)); 322extern void coff_get_symbol_info PARAMS ((bfd *, asymbol *, 323 symbol_info *ret)); 324extern boolean _bfd_coff_is_local_label_name PARAMS ((bfd *, const char *)); 325extern asymbol *coff_bfd_make_debug_symbol PARAMS ((bfd *, PTR, 326 unsigned long)); 327extern boolean coff_find_nearest_line PARAMS ((bfd *, 328 asection *, 329 asymbol **, 330 bfd_vma offset, 331 CONST char **filename_ptr, 332 CONST char **functionname_ptr, 333 unsigned int *line_ptr)); 334extern int coff_sizeof_headers PARAMS ((bfd *, boolean reloc)); 335extern boolean bfd_coff_reloc16_relax_section 336 PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *)); 337extern 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 **)); 340extern bfd_vma bfd_coff_reloc16_get_value PARAMS ((arelent *, 341 struct bfd_link_info *, 342 asection *)); 343extern void bfd_perform_slip PARAMS ((bfd *abfd, unsigned int slip, 344 asection *input_section, 345 bfd_vma val)); 346 347/* Functions and types in cofflink.c. */ 348 349#define STRING_SIZE_SIZE (4) 350 351/* We use a hash table to merge identical enum, struct, and union 352 definitions in the linker. */ 353 354/* Information we keep for a single element (an enum value, a 355 structure or union field) in the debug merge hash table. */ 356 357struct coff_debug_merge_element 358{ 359 /* Next element. */ 360 struct coff_debug_merge_element *next; 361 362 /* Name. */ 363 const char *name; 364 365 /* Type. */ 366 unsigned int type; 367 368 /* Symbol index for complex type. */ 369 long tagndx; 370}; 371 372/* A linked list of debug merge entries for a given name. */ 373 374struct coff_debug_merge_type 375{ 376 /* Next type with the same name. */ 377 struct coff_debug_merge_type *next; 378 379 /* Class of type. */ 380 int class; 381 382 /* Symbol index where this type is defined. */ 383 long indx; 384 385 /* List of elements. */ 386 struct coff_debug_merge_element *elements; 387}; 388 389/* Information we store in the debug merge hash table. */ 390 391struct coff_debug_merge_hash_entry 392{ 393 struct bfd_hash_entry root; 394 395 /* A list of types with this name. */ 396 struct coff_debug_merge_type *types; 397}; 398 399/* The debug merge hash table. */ 400 401struct coff_debug_merge_hash_table 402{ 403 struct bfd_hash_table root; 404}; 405 406/* Initialize a COFF debug merge hash table. */ 407 408#define coff_debug_merge_hash_table_init(table) \ 409 (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc)) 410 411/* Free a COFF debug merge hash table. */ 412 413#define coff_debug_merge_hash_table_free(table) \ 414 (bfd_hash_table_free (&(table)->root)) 415 416/* Look up an entry in a COFF debug merge hash table. */ 417 418#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))) 421 422/* Information we keep for each section in the output file when doing 423 a relocateable link. */ 424 425struct coff_link_section_info 426{ 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; 432}; 433 434/* Information that we pass around while doing the final link step. */ 435 436struct coff_final_link_info 437{ 438 /* General link information. */ 439 struct bfd_link_info *info; 440 /* Output BFD. */ 441 bfd *output_bfd; 442 /* Used to indicate failure in traversal routine. */ 443 boolean failed; 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). */ 459 long last_bf_index; 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. */ 467 asection **sec_ptrs; 468 /* Buffer large enough to hold output indices of symbols of any 469 input file. */ 470 long *sym_indices; 471 /* Buffer large enough to hold output symbols for any input file. */ 472 bfd_byte *outsyms; 473 /* Buffer large enough to hold external line numbers for any input 474 section. */ 475 bfd_byte *linenos; 476 /* Buffer large enough to hold any input section. */ 477 bfd_byte *contents; 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; 482}; 483 484/* 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. */ 487 488struct coff_section_alignment_entry 489{ 490 /* The section name. */ 491 const char *name; 492 493 /* 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; 497 498 /* 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) 502 503 /* 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; 507 508 /* 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; 512 513#define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1) 514 515 /* The desired alignment for this section (as a power of two). */ 516 unsigned int alignment_power; 517}; 518 519extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc 520 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); 521extern 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 *, 525 const char *))); 526extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create 527 PARAMS ((bfd *)); 528extern const char *_bfd_coff_internal_syment_name 529 PARAMS ((bfd *, const struct internal_syment *, char *)); 530extern boolean _bfd_coff_link_add_symbols 531 PARAMS ((bfd *, struct bfd_link_info *)); 532extern boolean _bfd_coff_final_link 533 PARAMS ((bfd *, struct bfd_link_info *)); 534extern struct internal_reloc *_bfd_coff_read_internal_relocs 535 PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean, 536 struct internal_reloc *)); 537extern 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 **)); 540 541extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc 542 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); 543extern boolean _bfd_coff_write_global_sym 544 PARAMS ((struct coff_link_hash_entry *, PTR)); 545extern boolean _bfd_coff_write_task_globals 546 PARAMS ((struct coff_link_hash_entry *, PTR)); 547extern boolean _bfd_coff_link_input_bfd 548 PARAMS ((struct coff_final_link_info *, bfd *)); 549extern boolean _bfd_coff_reloc_link_order 550 PARAMS ((bfd *, struct coff_final_link_info *, asection *, 551 struct bfd_link_order *)); 552 553 554#define coff_get_section_contents_in_window \ 555 _bfd_generic_get_section_contents_in_window 556 557/* Functions in xcofflink.c. */ 558 559extern long _bfd_xcoff_get_dynamic_symtab_upper_bound PARAMS ((bfd *)); 560extern long _bfd_xcoff_canonicalize_dynamic_symtab 561 PARAMS ((bfd *, asymbol **)); 562extern long _bfd_xcoff_get_dynamic_reloc_upper_bound PARAMS ((bfd *)); 563extern long _bfd_xcoff_canonicalize_dynamic_reloc 564 PARAMS ((bfd *, arelent **, asymbol **)); 565extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create 566 PARAMS ((bfd *)); 567extern boolean _bfd_xcoff_bfd_link_add_symbols 568 PARAMS ((bfd *, struct bfd_link_info *)); 569extern boolean _bfd_xcoff_bfd_final_link 570 PARAMS ((bfd *, struct bfd_link_info *)); 571extern 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 **)); 574 575/* 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. */ 577 578extern boolean ppc_allocate_toc_section PARAMS ((struct bfd_link_info *)); 579extern boolean ppc_process_before_allocation 580 PARAMS ((bfd *, struct bfd_link_info *)); 581 582/* And more taken from the source .. */ 583 584