1 /* BFD back-end data structures for a.out (and similar) files. 2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 3 2000, 2001, 2002, 2003, 2004, 2005, 2006 4 Free Software Foundation, Inc. 5 Written by Cygnus Support. 6 7 This file is part of BFD, the Binary File Descriptor library. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23 #ifndef LIBAOUT_H 24 #define LIBAOUT_H 25 26 /* We try to encapsulate the differences in the various a.out file 27 variants in a few routines, and otherwise share large masses of code. 28 This means we only have to fix bugs in one place, most of the time. */ 29 30 #include "bfdlink.h" 31 32 /* Macros for accessing components in an aout header. */ 33 34 #define H_PUT_64 bfd_h_put_64 35 #define H_PUT_32 bfd_h_put_32 36 #define H_PUT_16 bfd_h_put_16 37 #define H_PUT_8 bfd_h_put_8 38 #define H_PUT_S64 bfd_h_put_signed_64 39 #define H_PUT_S32 bfd_h_put_signed_32 40 #define H_PUT_S16 bfd_h_put_signed_16 41 #define H_PUT_S8 bfd_h_put_signed_8 42 #define H_GET_64 bfd_h_get_64 43 #define H_GET_32 bfd_h_get_32 44 #define H_GET_16 bfd_h_get_16 45 #define H_GET_8 bfd_h_get_8 46 #define H_GET_S64 bfd_h_get_signed_64 47 #define H_GET_S32 bfd_h_get_signed_32 48 #define H_GET_S16 bfd_h_get_signed_16 49 #define H_GET_S8 bfd_h_get_signed_8 50 51 /* Parameterize the a.out code based on whether it is being built 52 for a 32-bit architecture or a 64-bit architecture. */ 53 /* Do not "beautify" the CONCAT* macro args. Traditional C will not 54 remove whitespace added here, and thus will fail to concatenate 55 the tokens. */ 56 #if ARCH_SIZE==64 57 #define GET_WORD H_GET_64 58 #define GET_SWORD H_GET_S64 59 #define GET_MAGIC H_GET_32 60 #define PUT_WORD H_PUT_64 61 #define PUT_MAGIC H_PUT_32 62 #ifndef NAME 63 #define NAME(x,y) CONCAT3 (x,_64_,y) 64 #endif 65 #define JNAME(x) CONCAT2 (x,_64) 66 #define BYTES_IN_WORD 8 67 #else 68 #if ARCH_SIZE==16 69 #define GET_WORD H_GET_16 70 #define GET_SWORD H_GET_S16 71 #define GET_MAGIC H_GET_16 72 #define PUT_WORD H_PUT_16 73 #define PUT_MAGIC H_PUT_16 74 #ifndef NAME 75 #define NAME(x,y) CONCAT3 (x,_16_,y) 76 #endif 77 #define JNAME(x) CONCAT2 (x,_16) 78 #define BYTES_IN_WORD 2 79 #else /* ARCH_SIZE == 32 */ 80 #define GET_WORD H_GET_32 81 #define GET_SWORD H_GET_S32 82 #define GET_MAGIC H_GET_32 83 #define PUT_WORD H_PUT_32 84 #define PUT_MAGIC H_PUT_32 85 #ifndef NAME 86 #define NAME(x,y) CONCAT3 (x,_32_,y) 87 #endif 88 #define JNAME(x) CONCAT2 (x,_32) 89 #define BYTES_IN_WORD 4 90 #endif /* ARCH_SIZE==32 */ 91 #endif /* ARCH_SIZE==64 */ 92 93 /* Declare at file level, since used in parameter lists, which have 94 weird scope. */ 95 struct external_exec; 96 struct external_nlist; 97 struct reloc_ext_external; 98 struct reloc_std_external; 99 100 /* a.out backend linker hash table entries. */ 101 102 struct aout_link_hash_entry 103 { 104 struct bfd_link_hash_entry root; 105 /* Whether this symbol has been written out. */ 106 bfd_boolean written; 107 /* Symbol index in output file. */ 108 int indx; 109 }; 110 111 /* a.out backend linker hash table. */ 112 113 struct aout_link_hash_table 114 { 115 struct bfd_link_hash_table root; 116 }; 117 118 /* Look up an entry in an a.out link hash table. */ 119 120 #define aout_link_hash_lookup(table, string, create, copy, follow) \ 121 ((struct aout_link_hash_entry *) \ 122 bfd_link_hash_lookup (&(table)->root, (string), (create), (copy), (follow))) 123 124 /* Traverse an a.out link hash table. */ 125 126 #define aout_link_hash_traverse(table, func, info) \ 127 (bfd_link_hash_traverse \ 128 (&(table)->root, \ 129 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \ 130 (info))) 131 132 /* Get the a.out link hash table from the info structure. This is 133 just a cast. */ 134 135 #define aout_hash_table(p) ((struct aout_link_hash_table *) ((p)->hash)) 136 137 /* Back-end information for various a.out targets. */ 138 struct aout_backend_data 139 { 140 /* Are ZMAGIC files mapped contiguously? If so, the text section may 141 need more padding, if the segment size (granularity for memory access 142 control) is larger than the page size. */ 143 unsigned char zmagic_mapped_contiguous; 144 /* If this flag is set, ZMAGIC/NMAGIC file headers get mapped in with the 145 text section, which starts immediately after the file header. 146 If not, the text section starts on the next page. */ 147 unsigned char text_includes_header; 148 149 /* If this flag is set, then if the entry address is not in the 150 first SEGMENT_SIZE bytes of the text section, it is taken to be 151 the address of the start of the text section. This can be useful 152 for kernels. */ 153 unsigned char entry_is_text_address; 154 155 /* The value to pass to N_SET_FLAGS. */ 156 unsigned char exec_hdr_flags; 157 158 /* If the text section VMA isn't specified, and we need an absolute 159 address, use this as the default. If we're producing a relocatable 160 file, zero is always used. */ 161 /* ?? Perhaps a callback would be a better choice? Will this do anything 162 reasonable for a format that handles multiple CPUs with different 163 load addresses for each? */ 164 bfd_vma default_text_vma; 165 166 /* Callback for setting the page and segment sizes, if they can't be 167 trivially determined from the architecture. */ 168 bfd_boolean (*set_sizes) (bfd *); 169 170 /* zmagic files only. For go32, the length of the exec header contributes 171 to the size of the text section in the file for alignment purposes but 172 does *not* get counted in the length of the text section. */ 173 unsigned char exec_header_not_counted; 174 175 /* Callback from the add symbols phase of the linker code to handle 176 a dynamic object. */ 177 bfd_boolean (*add_dynamic_symbols) 178 (bfd *, struct bfd_link_info *, struct external_nlist **, 179 bfd_size_type *, char **); 180 181 /* Callback from the add symbols phase of the linker code to handle 182 adding a single symbol to the global linker hash table. */ 183 bfd_boolean (*add_one_symbol) 184 (struct bfd_link_info *, bfd *, const char *, flagword, 185 asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean, 186 struct bfd_link_hash_entry **); 187 188 /* Called to handle linking a dynamic object. */ 189 bfd_boolean (*link_dynamic_object) 190 (struct bfd_link_info *, bfd *); 191 192 /* Called for each global symbol being written out by the linker. 193 This should write out the dynamic symbol information. */ 194 bfd_boolean (*write_dynamic_symbol) 195 (bfd *, struct bfd_link_info *, struct aout_link_hash_entry *); 196 197 /* If this callback is not NULL, the linker calls it for each reloc. 198 RELOC is a pointer to the unswapped reloc. If *SKIP is set to 199 TRUE, the reloc will be skipped. *RELOCATION may be changed to 200 change the effects of the relocation. */ 201 bfd_boolean (*check_dynamic_reloc) 202 (struct bfd_link_info *info, bfd *input_bfd, 203 asection *input_section, struct aout_link_hash_entry *h, 204 void * reloc, bfd_byte *contents, bfd_boolean *skip, 205 bfd_vma *relocation); 206 207 /* Called at the end of a link to finish up any dynamic linking 208 information. */ 209 bfd_boolean (*finish_dynamic_link) (bfd *, struct bfd_link_info *); 210 }; 211 #define aout_backend_info(abfd) \ 212 ((const struct aout_backend_data *)((abfd)->xvec->backend_data)) 213 214 /* This is the layout in memory of a "struct exec" while we process it. 215 All 'lengths' are given as a number of bytes. 216 All 'alignments' are for relinkable files only; an alignment of 217 'n' indicates the corresponding segment must begin at an 218 address that is a multiple of (2**n). */ 219 220 struct internal_exec 221 { 222 long a_info; /* Magic number and flags, packed. */ 223 bfd_vma a_text; /* Length of text, in bytes. */ 224 bfd_vma a_data; /* Length of data, in bytes. */ 225 bfd_vma a_bss; /* Length of uninitialized data area in mem. */ 226 bfd_vma a_syms; /* Length of symbol table data in file. */ 227 bfd_vma a_entry; /* Start address. */ 228 bfd_vma a_trsize; /* Length of text's relocation info, in bytes. */ 229 bfd_vma a_drsize; /* Length of data's relocation info, in bytes. */ 230 /* Added for i960 */ 231 bfd_vma a_tload; /* Text runtime load address. */ 232 bfd_vma a_dload; /* Data runtime load address. */ 233 unsigned char a_talign; /* Alignment of text segment. */ 234 unsigned char a_dalign; /* Alignment of data segment. */ 235 unsigned char a_balign; /* Alignment of bss segment. */ 236 char a_relaxable; /* Enough info for linker relax. */ 237 }; 238 239 /* Magic number is written 240 < MSB > 241 3130292827262524232221201918171615141312111009080706050403020100 242 < FLAGS >< MACHINE TYPE >< MAGIC NUMBER > */ 243 244 /* Magic number for NetBSD is 245 <MSB > 246 3130292827262524232221201918171615141312111009080706050403020100 247 < FLAGS >< MACHINE TYPE >< MAGIC NUMBER > */ 248 249 enum machine_type 250 { 251 M_UNKNOWN = 0, 252 M_68010 = 1, 253 M_68020 = 2, 254 M_SPARC = 3, 255 /* Skip a bunch so we don't run into any of SUN's numbers. */ 256 /* Make these up for the ns32k. */ 257 M_NS32032 = (64), /* NS32032 running ? */ 258 M_NS32532 = (64 + 5), /* NS32532 running mach. */ 259 M_386 = 100, 260 M_29K = 101, /* AMD 29000. */ 261 M_386_DYNIX = 102, /* Sequent running dynix. */ 262 M_ARM = 103, /* Advanced Risc Machines ARM. */ 263 M_SPARCLET = 131, /* SPARClet = M_SPARC + 128. */ 264 M_386_NETBSD = 134, /* NetBSD/i386 binary. */ 265 M_68K_NETBSD = 135, /* NetBSD/m68k binary. */ 266 M_68K4K_NETBSD = 136, /* NetBSD/m68k4k binary. */ 267 M_532_NETBSD = 137, /* NetBSD/ns32k binary. */ 268 M_SPARC_NETBSD = 138, /* NetBSD/sparc binary. */ 269 M_PMAX_NETBSD = 139, /* NetBSD/pmax (MIPS little-endian) binary. */ 270 M_VAX_NETBSD = 140, /* NetBSD/vax binary. */ 271 M_ALPHA_NETBSD = 141, /* NetBSD/alpha binary. */ 272 M_ARM6_NETBSD = 143, /* NetBSD/arm32 binary. */ 273 M_SPARCLET_1 = 147, /* 0x93, reserved. */ 274 M_POWERPC_NETBSD = 149, /* NetBSD/powerpc (big-endian) binary. */ 275 M_VAX4K_NETBSD = 150, /* NetBSD/vax 4K pages binary. */ 276 M_MIPS1 = 151, /* MIPS R2000/R3000 binary. */ 277 M_MIPS2 = 152, /* MIPS R4000/R6000 binary. */ 278 M_88K_OPENBSD = 153, /* OpenBSD/m88k binary. */ 279 M_HPPA_OPENBSD = 154, /* OpenBSD/hppa binary. */ 280 M_SPARC64_NETBSD = 156, /* NetBSD/sparc64 binary. */ 281 M_X86_64_NETBSD = 157, /* NetBSD/amd64 binary. */ 282 M_SPARCLET_2 = 163, /* 0xa3, reserved. */ 283 M_SPARCLET_3 = 179, /* 0xb3, reserved. */ 284 M_SPARCLET_4 = 195, /* 0xc3, reserved. */ 285 M_HP200 = 200, /* HP 200 (68010) BSD binary. */ 286 M_HP300 = (300 % 256), /* HP 300 (68020+68881) BSD binary. */ 287 M_HPUX = (0x20c % 256), /* HP 200/300 HPUX binary. */ 288 M_SPARCLET_5 = 211, /* 0xd3, reserved. */ 289 M_SPARCLET_6 = 227, /* 0xe3, reserved. */ 290 /*M_SPARCLET_7 = 243 / * 0xf3, reserved. */ 291 M_SPARCLITE_LE = 243, 292 M_CRIS = 255 /* Axis CRIS binary. */ 293 }; 294 295 #define N_DYNAMIC(exec) ((exec).a_info & 0x80000000) 296 297 #ifndef N_MAGIC 298 # define N_MAGIC(exec) ((exec).a_info & 0xffff) 299 #endif 300 301 #ifndef N_MACHTYPE 302 # define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff)) 303 #endif 304 305 #ifndef N_FLAGS 306 # define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff) 307 #endif 308 309 #ifndef N_SET_INFO 310 # define N_SET_INFO(exec, magic, type, flags) \ 311 ((exec).a_info = ((magic) & 0xffff) \ 312 | (((int)(type) & 0xff) << 16) \ 313 | (((flags) & 0xff) << 24)) 314 #endif 315 316 #ifndef N_SET_DYNAMIC 317 # define N_SET_DYNAMIC(exec, dynamic) \ 318 ((exec).a_info = (dynamic) ? (long) ((exec).a_info | 0x80000000) : \ 319 ((exec).a_info & 0x7fffffff)) 320 #endif 321 322 #ifndef N_SET_MAGIC 323 # define N_SET_MAGIC(exec, magic) \ 324 ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff))) 325 #endif 326 327 #ifndef N_SET_MACHTYPE 328 # define N_SET_MACHTYPE(exec, machtype) \ 329 ((exec).a_info = \ 330 ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16)) 331 #endif 332 333 #ifndef N_SET_FLAGS 334 # define N_SET_FLAGS(exec, flags) \ 335 ((exec).a_info = \ 336 ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24)) 337 #endif 338 339 typedef struct aout_symbol 340 { 341 asymbol symbol; 342 short desc; 343 char other; 344 unsigned char type; 345 } aout_symbol_type; 346 347 /* The `tdata' struct for all a.out-like object file formats. 348 Various things depend on this struct being around any time an a.out 349 file is being handled. An example is dbxread.c in GDB. */ 350 351 struct aoutdata 352 { 353 struct internal_exec *hdr; /* Exec file header. */ 354 aout_symbol_type *symbols; /* Symtab for input bfd. */ 355 356 /* For ease, we do this. */ 357 asection *textsec; 358 asection *datasec; 359 asection *bsssec; 360 361 /* We remember these offsets so that after check_file_format, we have 362 no dependencies on the particular format of the exec_hdr. */ 363 file_ptr sym_filepos; 364 file_ptr str_filepos; 365 366 /* Size of a relocation entry in external form. */ 367 unsigned reloc_entry_size; 368 369 /* Size of a symbol table entry in external form. */ 370 unsigned symbol_entry_size; 371 372 /* Page size - needed for alignment of demand paged files. */ 373 unsigned long page_size; 374 375 /* Segment size - needed for alignment of demand paged files. */ 376 unsigned long segment_size; 377 378 /* Zmagic disk block size - need to align the start of the text 379 section in ZMAGIC binaries. Normally the same as page_size. */ 380 unsigned long zmagic_disk_block_size; 381 382 unsigned exec_bytes_size; 383 unsigned vma_adjusted : 1; 384 385 /* Used when a bfd supports several highly similar formats. */ 386 enum 387 { 388 default_format = 0, 389 /* Used on HP 9000/300 running HP/UX. See hp300hpux.c. */ 390 gnu_encap_format, 391 /* Used on Linux, 386BSD, etc. See include/aout/aout64.h. */ 392 q_magic_format 393 } subformat; 394 395 enum 396 { 397 undecided_magic = 0, 398 z_magic, 399 o_magic, 400 n_magic 401 } magic; 402 403 /* A buffer for find_nearest_line. */ 404 char *line_buf; 405 406 /* The external symbol information. */ 407 struct external_nlist *external_syms; 408 bfd_size_type external_sym_count; 409 bfd_window sym_window; 410 char *external_strings; 411 bfd_size_type external_string_size; 412 bfd_window string_window; 413 struct aout_link_hash_entry **sym_hashes; 414 415 /* A pointer for shared library information. */ 416 void * dynamic_info; 417 418 /* A mapping from local symbols to offsets into the global offset 419 table, used when linking on SunOS. This is indexed by the symbol 420 index. */ 421 bfd_vma *local_got_offsets; 422 }; 423 424 struct aout_data_struct 425 { 426 struct aoutdata a; 427 struct internal_exec e; 428 }; 429 430 #define adata(bfd) ((bfd)->tdata.aout_data->a) 431 #define exec_hdr(bfd) (adata (bfd).hdr) 432 #define obj_aout_symbols(bfd) (adata (bfd).symbols) 433 #define obj_textsec(bfd) (adata (bfd).textsec) 434 #define obj_datasec(bfd) (adata (bfd).datasec) 435 #define obj_bsssec(bfd) (adata (bfd).bsssec) 436 #define obj_sym_filepos(bfd) (adata (bfd).sym_filepos) 437 #define obj_str_filepos(bfd) (adata (bfd).str_filepos) 438 #define obj_reloc_entry_size(bfd) (adata (bfd).reloc_entry_size) 439 #define obj_symbol_entry_size(bfd) (adata (bfd).symbol_entry_size) 440 #define obj_aout_subformat(bfd) (adata (bfd).subformat) 441 #define obj_aout_external_syms(bfd) (adata (bfd).external_syms) 442 #define obj_aout_external_sym_count(bfd) (adata (bfd).external_sym_count) 443 #define obj_aout_sym_window(bfd) (adata (bfd).sym_window) 444 #define obj_aout_external_strings(bfd) (adata (bfd).external_strings) 445 #define obj_aout_external_string_size(bfd) (adata (bfd).external_string_size) 446 #define obj_aout_string_window(bfd) (adata (bfd).string_window) 447 #define obj_aout_sym_hashes(bfd) (adata (bfd).sym_hashes) 448 #define obj_aout_dynamic_info(bfd) (adata (bfd).dynamic_info) 449 450 /* We take the address of the first element of an asymbol to ensure that the 451 macro is only ever applied to an asymbol. */ 452 #define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd)) 453 454 /* Information we keep for each a.out section. This is currently only 455 used by the a.out backend linker. */ 456 457 struct aout_section_data_struct 458 { 459 /* The unswapped relocation entries for this section. */ 460 void * relocs; 461 }; 462 463 #define aout_section_data(s) \ 464 ((struct aout_section_data_struct *) (s)->used_by_bfd) 465 466 #define set_aout_section_data(s,v) \ 467 ((s)->used_by_bfd = (void *)&(v)->relocs) 468 469 /* Prototype declarations for functions defined in aoutx.h. */ 470 471 extern bfd_boolean NAME (aout, squirt_out_relocs) 472 (bfd *, asection *); 473 474 extern bfd_boolean NAME (aout, make_sections) 475 (bfd *); 476 477 extern const bfd_target * NAME (aout, some_aout_object_p) 478 (bfd *, struct internal_exec *, const bfd_target *(*) (bfd *)); 479 480 extern bfd_boolean NAME (aout, mkobject) 481 (bfd *); 482 483 extern enum machine_type NAME (aout, machine_type) 484 (enum bfd_architecture, unsigned long, bfd_boolean *); 485 486 extern bfd_boolean NAME (aout, set_arch_mach) 487 (bfd *, enum bfd_architecture, unsigned long); 488 489 extern bfd_boolean NAME (aout, new_section_hook) 490 (bfd *, asection *); 491 492 extern bfd_boolean NAME (aout, set_section_contents) 493 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type); 494 495 extern asymbol * NAME (aout, make_empty_symbol) 496 (bfd *); 497 498 extern bfd_boolean NAME (aout, translate_symbol_table) 499 (bfd *, aout_symbol_type *, struct external_nlist *, bfd_size_type, 500 char *, bfd_size_type, bfd_boolean); 501 502 extern bfd_boolean NAME (aout, slurp_symbol_table) 503 (bfd *); 504 505 extern bfd_boolean NAME (aout, write_syms) 506 (bfd *); 507 508 extern void NAME (aout, reclaim_symbol_table) 509 (bfd *); 510 511 extern long NAME (aout, get_symtab_upper_bound) 512 (bfd *); 513 514 extern long NAME (aout, canonicalize_symtab) 515 (bfd *, asymbol **); 516 517 extern void NAME (aout, swap_ext_reloc_in) 518 (bfd *, struct reloc_ext_external *, arelent *, asymbol **, 519 bfd_size_type); 520 521 extern void NAME (aout, swap_std_reloc_in) 522 (bfd *, struct reloc_std_external *, arelent *, asymbol **, 523 bfd_size_type); 524 525 extern reloc_howto_type * NAME (aout, reloc_type_lookup) 526 (bfd *, bfd_reloc_code_real_type); 527 528 extern bfd_boolean NAME (aout, slurp_reloc_table) 529 (bfd *, sec_ptr, asymbol **); 530 531 extern long NAME (aout, canonicalize_reloc) 532 (bfd *, sec_ptr, arelent **, asymbol **); 533 534 extern long NAME (aout, get_reloc_upper_bound) 535 (bfd *, sec_ptr); 536 537 extern void NAME (aout, reclaim_reloc) 538 (bfd *, sec_ptr); 539 540 extern alent * NAME (aout, get_lineno) 541 (bfd *, asymbol *); 542 543 extern void NAME (aout, print_symbol) 544 (bfd *, void *, asymbol *, bfd_print_symbol_type); 545 546 extern void NAME (aout, get_symbol_info) 547 (bfd *, asymbol *, symbol_info *); 548 549 extern bfd_boolean NAME (aout, find_nearest_line) 550 (bfd *, asection *, asymbol **, bfd_vma, const char **, 551 const char **, unsigned int *); 552 553 extern long NAME (aout, read_minisymbols) 554 (bfd *, bfd_boolean, void * *, unsigned int *); 555 556 extern asymbol * NAME (aout, minisymbol_to_symbol) 557 (bfd *, bfd_boolean, const void *, asymbol *); 558 559 extern int NAME (aout, sizeof_headers) 560 (bfd *, bfd_boolean); 561 562 extern bfd_boolean NAME (aout, adjust_sizes_and_vmas) 563 (bfd *, bfd_size_type *, file_ptr *); 564 565 extern void NAME (aout, swap_exec_header_in) 566 (bfd *, struct external_exec *, struct internal_exec *); 567 568 extern void NAME (aout, swap_exec_header_out) 569 (bfd *, struct internal_exec *, struct external_exec *); 570 571 extern struct bfd_hash_entry * NAME (aout, link_hash_newfunc) 572 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 573 574 extern bfd_boolean NAME (aout, link_hash_table_init) 575 (struct aout_link_hash_table *, bfd *, 576 struct bfd_hash_entry *(*) (struct bfd_hash_entry *, 577 struct bfd_hash_table *, 578 const char *), 579 unsigned int); 580 581 extern struct bfd_link_hash_table * NAME (aout, link_hash_table_create) 582 (bfd *); 583 584 extern bfd_boolean NAME (aout, link_add_symbols) 585 (bfd *, struct bfd_link_info *); 586 587 extern bfd_boolean NAME (aout, final_link) 588 (bfd *, struct bfd_link_info *, 589 void (*) (bfd *, file_ptr *, file_ptr *, file_ptr *)); 590 591 extern bfd_boolean NAME (aout, bfd_free_cached_info) 592 (bfd *); 593 594 #define aout_32_find_inliner_info _bfd_nosymbols_find_inliner_info 595 #if 0 /* Are these needed? */ 596 #define aout_16_find_inliner_info _bfd_nosymbols_find_inliner_info 597 #define aout_64_find_inliner_info _bfd_nosymbols_find_inliner_info 598 #endif 599 600 /* A.out uses the generic versions of these routines... */ 601 602 #define aout_16_get_section_contents _bfd_generic_get_section_contents 603 604 #define aout_32_get_section_contents _bfd_generic_get_section_contents 605 606 #define aout_64_get_section_contents _bfd_generic_get_section_contents 607 #ifndef NO_WRITE_HEADER_KLUDGE 608 #define NO_WRITE_HEADER_KLUDGE 0 609 #endif 610 611 #ifndef aout_32_bfd_is_local_label_name 612 #define aout_32_bfd_is_local_label_name bfd_generic_is_local_label_name 613 #endif 614 615 #ifndef aout_32_bfd_is_target_special_symbol 616 #define aout_32_bfd_is_target_special_symbol \ 617 ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) 618 #endif 619 620 #ifndef WRITE_HEADERS 621 #define WRITE_HEADERS(abfd, execp) \ 622 { \ 623 bfd_size_type text_size; /* Dummy vars. */ \ 624 file_ptr text_end; \ 625 \ 626 if (adata(abfd).magic == undecided_magic) \ 627 NAME (aout, adjust_sizes_and_vmas) (abfd, & text_size, & text_end); \ 628 \ 629 execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE; \ 630 execp->a_entry = bfd_get_start_address (abfd); \ 631 \ 632 execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * \ 633 obj_reloc_entry_size (abfd)); \ 634 execp->a_drsize = ((obj_datasec (abfd)->reloc_count) * \ 635 obj_reloc_entry_size (abfd)); \ 636 NAME (aout, swap_exec_header_out) (abfd, execp, & exec_bytes); \ 637 \ 638 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 \ 639 || bfd_bwrite (& exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE, \ 640 abfd) != EXEC_BYTES_SIZE) \ 641 return FALSE; \ 642 /* Now write out reloc info, followed by syms and strings. */ \ 643 \ 644 if (bfd_get_outsymbols (abfd) != NULL \ 645 && bfd_get_symcount (abfd) != 0) \ 646 { \ 647 if (bfd_seek (abfd, (file_ptr) (N_SYMOFF(*execp)), SEEK_SET) != 0)\ 648 return FALSE; \ 649 \ 650 if (! NAME (aout, write_syms) (abfd)) \ 651 return FALSE; \ 652 } \ 653 \ 654 if (bfd_seek (abfd, (file_ptr) (N_TRELOFF (*execp)), SEEK_SET) != 0) \ 655 return FALSE; \ 656 if (!NAME (aout, squirt_out_relocs) (abfd, obj_textsec (abfd))) \ 657 return FALSE; \ 658 \ 659 if (bfd_seek (abfd, (file_ptr) (N_DRELOFF (*execp)), SEEK_SET) != 0) \ 660 return FALSE; \ 661 if (!NAME (aout, squirt_out_relocs) (abfd, obj_datasec (abfd))) \ 662 return FALSE; \ 663 } 664 #endif 665 666 /* Test if a read-only section can be merged with .text. This is 667 possible if: 668 669 1. Section has file contents and is read-only. 670 2. The VMA of the section is after the end of .text and before 671 the start of .data. 672 3. The image is demand-pageable (otherwise, a_text in the header 673 will not reflect the gap between .text and .data). */ 674 675 #define aout_section_merge_with_text_p(abfd, sec) \ 676 (((sec)->flags & (SEC_HAS_CONTENTS | SEC_READONLY)) == \ 677 (SEC_HAS_CONTENTS | SEC_READONLY) \ 678 && obj_textsec (abfd) != NULL \ 679 && obj_datasec (abfd) != NULL \ 680 && (sec)->vma >= (obj_textsec (abfd)->vma + \ 681 obj_textsec (abfd)->size) \ 682 && ((sec)->vma + (sec)->size) <= obj_datasec (abfd)->vma \ 683 && ((abfd)->flags & D_PAGED) != 0) 684 685 #endif /* ! defined (LIBAOUT_H) */ 686