1 /* BFD back-end data structures for a.out (and similar) files. 2 Copyright (C) 1990-2020 Free Software Foundation, Inc. 3 Written by Cygnus Support. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 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. 11 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. 16 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. */ 21 22 #ifndef LIBAOUT_H 23 #define LIBAOUT_H 24 25 /* We try to encapsulate the differences in the various a.out file 26 variants in a few routines, and otherwise share large masses of code. 27 This means we only have to fix bugs in one place, most of the time. */ 28 29 #include "bfdlink.h" 30 31 /* Macros for accessing components in an aout header. */ 32 33 #define H_PUT_64 bfd_h_put_64 34 #define H_PUT_32 bfd_h_put_32 35 #define H_PUT_16 bfd_h_put_16 36 #define H_PUT_8 bfd_h_put_8 37 #define H_PUT_S64 bfd_h_put_signed_64 38 #define H_PUT_S32 bfd_h_put_signed_32 39 #define H_PUT_S16 bfd_h_put_signed_16 40 #define H_PUT_S8 bfd_h_put_signed_8 41 #define H_GET_64 bfd_h_get_64 42 #define H_GET_32 bfd_h_get_32 43 #define H_GET_16 bfd_h_get_16 44 #define H_GET_8 bfd_h_get_8 45 #define H_GET_S64 bfd_h_get_signed_64 46 #define H_GET_S32 bfd_h_get_signed_32 47 #define H_GET_S16 bfd_h_get_signed_16 48 #define H_GET_S8 bfd_h_get_signed_8 49 50 /* Parameterize the a.out code based on whether it is being built 51 for a 32-bit architecture or a 64-bit architecture. */ 52 /* Do not "beautify" the CONCAT* macro args. Traditional C will not 53 remove whitespace added here, and thus will fail to concatenate 54 the tokens. */ 55 #if ARCH_SIZE==64 56 #define GET_WORD H_GET_64 57 #define GET_SWORD H_GET_S64 58 #define GET_MAGIC H_GET_32 59 #define PUT_WORD H_PUT_64 60 #define PUT_MAGIC H_PUT_32 61 #ifndef NAME 62 #define NAME(x,y) CONCAT3 (x,_64_,y) 63 #endif 64 #define JNAME(x) CONCAT2 (x,_64) 65 #define BYTES_IN_WORD 8 66 #else 67 #if ARCH_SIZE==16 68 #define GET_WORD H_GET_16 69 #define GET_SWORD H_GET_S16 70 #define GET_MAGIC H_GET_16 71 #define PUT_WORD H_PUT_16 72 #define PUT_MAGIC H_PUT_16 73 #ifndef NAME 74 #define NAME(x,y) CONCAT3 (x,_16_,y) 75 #endif 76 #define JNAME(x) CONCAT2 (x,_16) 77 #define BYTES_IN_WORD 2 78 #else /* ARCH_SIZE == 32 */ 79 #define GET_WORD H_GET_32 80 #define GET_SWORD H_GET_S32 81 #define GET_MAGIC H_GET_32 82 #define PUT_WORD H_PUT_32 83 #define PUT_MAGIC H_PUT_32 84 #ifndef NAME 85 #define NAME(x,y) CONCAT3 (x,_32_,y) 86 #endif 87 #define JNAME(x) CONCAT2 (x,_32) 88 #define BYTES_IN_WORD 4 89 #endif /* ARCH_SIZE==32 */ 90 #endif /* ARCH_SIZE==64 */ 91 92 /* Declare at file level, since used in parameter lists, which have 93 weird scope. */ 94 struct external_exec; 95 struct external_nlist; 96 struct reloc_ext_external; 97 struct reloc_std_external; 98 99 /* a.out backend linker hash table entries. */ 100 101 struct aout_link_hash_entry 102 { 103 struct bfd_link_hash_entry root; 104 /* Whether this symbol has been written out. */ 105 bfd_boolean written; 106 /* Symbol index in output file. */ 107 int indx; 108 }; 109 110 /* a.out backend linker hash table. */ 111 112 struct aout_link_hash_table 113 { 114 struct bfd_link_hash_table root; 115 }; 116 117 /* Look up an entry in an a.out link hash table. */ 118 119 #define aout_link_hash_lookup(table, string, create, copy, follow) \ 120 ((struct aout_link_hash_entry *) \ 121 bfd_link_hash_lookup (&(table)->root, (string), (create), (copy), (follow))) 122 123 /* Traverse an a.out link hash table. */ 124 125 #define aout_link_hash_traverse(table, func, info) \ 126 (bfd_link_hash_traverse \ 127 (&(table)->root, \ 128 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \ 129 (info))) 130 131 /* Get the a.out link hash table from the info structure. This is 132 just a cast. */ 133 134 #define aout_hash_table(p) ((struct aout_link_hash_table *) ((p)->hash)) 135 136 /* Back-end information for various a.out targets. */ 137 struct aout_backend_data 138 { 139 /* Are ZMAGIC files mapped contiguously? If so, the text section may 140 need more padding, if the segment size (granularity for memory access 141 control) is larger than the page size. */ 142 unsigned char zmagic_mapped_contiguous; 143 /* If this flag is set, ZMAGIC/NMAGIC file headers get mapped in with the 144 text section, which starts immediately after the file header. 145 If not, the text section starts on the next page. */ 146 unsigned char text_includes_header; 147 148 /* If this flag is set, then if the entry address is not in the 149 first SEGMENT_SIZE bytes of the text section, it is taken to be 150 the address of the start of the text section. This can be useful 151 for kernels. */ 152 unsigned char entry_is_text_address; 153 154 /* The value to pass to N_SET_FLAGS. */ 155 unsigned char exec_hdr_flags; 156 157 /* If the text section VMA isn't specified, and we need an absolute 158 address, use this as the default. If we're producing a relocatable 159 file, zero is always used. */ 160 /* ?? Perhaps a callback would be a better choice? Will this do anything 161 reasonable for a format that handles multiple CPUs with different 162 load addresses for each? */ 163 bfd_vma default_text_vma; 164 165 /* Callback for setting the page and segment sizes, if they can't be 166 trivially determined from the architecture. */ 167 bfd_boolean (*set_sizes) (bfd *); 168 169 /* zmagic files only. For go32, the length of the exec header contributes 170 to the size of the text section in the file for alignment purposes but 171 does *not* get counted in the length of the text section. */ 172 unsigned char exec_header_not_counted; 173 174 /* Callback from the add symbols phase of the linker code to handle 175 a dynamic object. */ 176 bfd_boolean (*add_dynamic_symbols) 177 (bfd *, struct bfd_link_info *, struct external_nlist **, 178 bfd_size_type *, char **); 179 180 /* Callback from the add symbols phase of the linker code to handle 181 adding a single symbol to the global linker hash table. */ 182 bfd_boolean (*add_one_symbol) 183 (struct bfd_link_info *, bfd *, const char *, flagword, 184 asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean, 185 struct bfd_link_hash_entry **); 186 187 /* Called to handle linking a dynamic object. */ 188 bfd_boolean (*link_dynamic_object) 189 (struct bfd_link_info *, bfd *); 190 191 /* Called for each global symbol being written out by the linker. 192 This should write out the dynamic symbol information. */ 193 bfd_boolean (*write_dynamic_symbol) 194 (bfd *, struct bfd_link_info *, struct aout_link_hash_entry *); 195 196 /* If this callback is not NULL, the linker calls it for each reloc. 197 RELOC is a pointer to the unswapped reloc. If *SKIP is set to 198 TRUE, the reloc will be skipped. *RELOCATION may be changed to 199 change the effects of the relocation. */ 200 bfd_boolean (*check_dynamic_reloc) 201 (struct bfd_link_info *info, bfd *input_bfd, 202 asection *input_section, struct aout_link_hash_entry *h, 203 void * reloc, bfd_byte *contents, bfd_boolean *skip, 204 bfd_vma *relocation); 205 206 /* Called at the end of a link to finish up any dynamic linking 207 information. */ 208 bfd_boolean (*finish_dynamic_link) (bfd *, struct bfd_link_info *); 209 }; 210 #define aout_backend_info(abfd) \ 211 ((const struct aout_backend_data *)((abfd)->xvec->backend_data)) 212 213 /* This is the layout in memory of a "struct exec" while we process it. 214 All 'lengths' are given as a number of bytes. 215 All 'alignments' are for relinkable files only; an alignment of 216 'n' indicates the corresponding segment must begin at an 217 address that is a multiple of (2**n). */ 218 219 struct internal_exec 220 { 221 long a_info; /* Magic number and flags, packed. */ 222 bfd_vma a_text; /* Length of text, in bytes. */ 223 bfd_vma a_data; /* Length of data, in bytes. */ 224 bfd_vma a_bss; /* Length of uninitialized data area in mem. */ 225 bfd_vma a_syms; /* Length of symbol table data in file. */ 226 bfd_vma a_entry; /* Start address. */ 227 bfd_vma a_trsize; /* Length of text's relocation info, in bytes. */ 228 bfd_vma a_drsize; /* Length of data's relocation info, in bytes. */ 229 /* Added for i960 */ 230 bfd_vma a_tload; /* Text runtime load address. */ 231 bfd_vma a_dload; /* Data runtime load address. */ 232 unsigned char a_talign; /* Alignment of text segment. */ 233 unsigned char a_dalign; /* Alignment of data segment. */ 234 unsigned char a_balign; /* Alignment of bss segment. */ 235 char a_relaxable; /* Enough info for linker relax. */ 236 }; 237 238 /* Magic number is written 239 < MSB > 240 3130292827262524232221201918171615141312111009080706050403020100 241 < FLAGS >< MACHINE TYPE >< MAGIC NUMBER > */ 242 243 /* Magic number for NetBSD is 244 <MSB > 245 3130292827262524232221201918171615141312111009080706050403020100 246 < FLAGS >< MACHINE TYPE >< MAGIC NUMBER > */ 247 248 enum machine_type 249 { 250 M_UNKNOWN = 0, 251 M_68010 = 1, 252 M_68020 = 2, 253 M_SPARC = 3, 254 /* Skip a bunch so we don't run into any of SUN's numbers. */ 255 /* Make these up for the ns32k. */ 256 M_NS32032 = (64), /* NS32032 running ? */ 257 M_NS32532 = (64 + 5), /* NS32532 running mach. */ 258 M_386 = 100, 259 M_29K = 101, /* AMD 29000. */ 260 M_386_DYNIX = 102, /* Sequent running dynix. */ 261 M_ARM = 103, /* Advanced Risc Machines ARM. */ 262 M_SPARCLET = 131, /* SPARClet = M_SPARC + 128. */ 263 M_386_NETBSD = 134, /* NetBSD/i386 binary. */ 264 M_68K_NETBSD = 135, /* NetBSD/m68k binary. */ 265 M_68K4K_NETBSD = 136, /* NetBSD/m68k4k binary. */ 266 M_532_NETBSD = 137, /* NetBSD/ns32k binary. */ 267 M_SPARC_NETBSD = 138, /* NetBSD/sparc binary. */ 268 M_PMAX_NETBSD = 139, /* NetBSD/pmax (MIPS little-endian) binary. */ 269 M_VAX_NETBSD = 140, /* NetBSD/vax binary. */ 270 M_ALPHA_NETBSD = 141, /* NetBSD/alpha binary. */ 271 M_ARM6_NETBSD = 143, /* NetBSD/arm32 binary. */ 272 M_SPARCLET_1 = 147, /* 0x93, reserved. */ 273 M_POWERPC_NETBSD = 149, /* NetBSD/powerpc (big-endian) binary. */ 274 M_VAX4K_NETBSD = 150, /* NetBSD/vax 4K pages binary. */ 275 M_MIPS1 = 151, /* MIPS R2000/R3000 binary. */ 276 M_MIPS2 = 152, /* MIPS R4000/R6000 binary. */ 277 M_88K_OPENBSD = 153, /* OpenBSD/m88k binary. */ 278 M_HPPA_OPENBSD = 154, /* OpenBSD/hppa binary. */ 279 M_SPARC64_NETBSD = 156, /* NetBSD/sparc64 binary. */ 280 M_X86_64_NETBSD = 157, /* NetBSD/amd64 binary. */ 281 M_SPARCLET_2 = 163, /* 0xa3, reserved. */ 282 M_SPARCLET_3 = 179, /* 0xb3, reserved. */ 283 M_SPARCLET_4 = 195, /* 0xc3, reserved. */ 284 M_HP200 = 200, /* HP 200 (68010) BSD binary. */ 285 M_HP300 = (300 % 256), /* HP 300 (68020+68881) BSD binary. */ 286 M_HPUX = (0x20c % 256), /* HP 200/300 HPUX binary. */ 287 M_SPARCLET_5 = 211, /* 0xd3, reserved. */ 288 M_SPARCLET_6 = 227, /* 0xe3, reserved. */ 289 /*M_SPARCLET_7 = 243 / * 0xf3, reserved. */ 290 M_SPARCLITE_LE = 243, 291 M_CRIS = 255 /* Axis CRIS binary. */ 292 }; 293 294 #define N_DYNAMIC(execp) ((execp)->a_info & 0x80000000) 295 296 #ifndef N_MAGIC 297 # define N_MAGIC(execp) ((execp)->a_info & 0xffff) 298 #endif 299 300 #ifndef N_MACHTYPE 301 # define N_MACHTYPE(execp) ((enum machine_type)(((execp)->a_info >> 16) & 0xff)) 302 #endif 303 304 #ifndef N_FLAGS 305 # define N_FLAGS(execp) (((execp)->a_info >> 24) & 0xff) 306 #endif 307 308 #ifndef N_SET_INFO 309 # define N_SET_INFO(execp, magic, type, flags) \ 310 ((execp)->a_info = ((magic) & 0xffff) \ 311 | (((int)(type) & 0xff) << 16) \ 312 | (((flags) & 0xffu) << 24)) 313 #endif 314 315 #ifndef N_SET_DYNAMIC 316 # define N_SET_DYNAMIC(execp, dynamic) \ 317 ((execp)->a_info = (dynamic) ? (long) ((execp)->a_info | 0x80000000) : \ 318 ((execp)->a_info & 0x7fffffff)) 319 #endif 320 321 #ifndef N_SET_MAGIC 322 # define N_SET_MAGIC(execp, magic) \ 323 ((execp)->a_info = (((execp)->a_info & 0xffff0000) | ((magic) & 0xffff))) 324 #endif 325 326 #ifndef N_SET_MACHTYPE 327 # define N_SET_MACHTYPE(execp, machtype) \ 328 ((execp)->a_info = \ 329 ((execp)->a_info & 0xff00ffff) | ((((int) (machtype)) &0xff) << 16)) 330 #endif 331 332 #ifndef N_SET_FLAGS 333 # define N_SET_FLAGS(execp, flags) \ 334 ((execp)->a_info = \ 335 ((execp)->a_info & 0x00ffffff) | (((flags) & 0xffu) << 24)) 336 #endif 337 338 typedef struct aout_symbol 339 { 340 asymbol symbol; 341 short desc; 342 char other; 343 unsigned char type; 344 } aout_symbol_type; 345 346 /* The `tdata' struct for all a.out-like object file formats. 347 Various things depend on this struct being around any time an a.out 348 file is being handled. An example is dbxread.c in GDB. */ 349 350 enum aout_subformat { 351 default_format = 0, 352 /* Used on HP 9000/300 running HP/UX. */ 353 gnu_encap_format, 354 /* Used on Linux, 386BSD, etc. See include/aout/aout64.h. */ 355 q_magic_format 356 }; 357 358 enum aout_magic { 359 undecided_magic = 0, 360 z_magic, 361 o_magic, 362 n_magic 363 }; 364 365 struct aoutdata 366 { 367 struct internal_exec *hdr; /* Exec file header. */ 368 aout_symbol_type *symbols; /* Symtab for input bfd. */ 369 370 /* For ease, we do this. */ 371 asection *textsec; 372 asection *datasec; 373 asection *bsssec; 374 375 /* We remember these offsets so that after check_file_format, we have 376 no dependencies on the particular format of the exec_hdr. */ 377 file_ptr sym_filepos; 378 file_ptr str_filepos; 379 380 /* Size of a relocation entry in external form. */ 381 unsigned reloc_entry_size; 382 383 /* Size of a symbol table entry in external form. */ 384 unsigned symbol_entry_size; 385 386 /* Page size - needed for alignment of demand paged files. */ 387 unsigned long page_size; 388 389 /* Segment size - needed for alignment of demand paged files. */ 390 unsigned long segment_size; 391 392 /* Zmagic disk block size - need to align the start of the text 393 section in ZMAGIC binaries. Normally the same as page_size. */ 394 unsigned long zmagic_disk_block_size; 395 396 unsigned exec_bytes_size; 397 unsigned vma_adjusted : 1; 398 399 /* Used when a bfd supports several highly similar formats. */ 400 enum aout_subformat subformat; 401 402 enum aout_magic magic; 403 404 /* A buffer for find_nearest_line. */ 405 char *line_buf; 406 407 /* The external symbol information. */ 408 struct external_nlist *external_syms; 409 bfd_size_type external_sym_count; 410 bfd_window sym_window; 411 char *external_strings; 412 bfd_size_type external_string_size; 413 bfd_window string_window; 414 struct aout_link_hash_entry **sym_hashes; 415 416 /* A pointer for shared library information. */ 417 void * dynamic_info; 418 419 /* A mapping from local symbols to offsets into the global offset 420 table, used when linking on SunOS. This is indexed by the symbol 421 index. */ 422 bfd_vma *local_got_offsets; 423 }; 424 425 struct aout_data_struct 426 { 427 struct aoutdata a; 428 struct internal_exec e; 429 }; 430 431 #define adata(bfd) ((bfd)->tdata.aout_data->a) 432 #define exec_hdr(bfd) (adata (bfd).hdr) 433 #define obj_aout_symbols(bfd) (adata (bfd).symbols) 434 #define obj_textsec(bfd) (adata (bfd).textsec) 435 #define obj_datasec(bfd) (adata (bfd).datasec) 436 #define obj_bsssec(bfd) (adata (bfd).bsssec) 437 #define obj_sym_filepos(bfd) (adata (bfd).sym_filepos) 438 #define obj_str_filepos(bfd) (adata (bfd).str_filepos) 439 #define obj_reloc_entry_size(bfd) (adata (bfd).reloc_entry_size) 440 #define obj_symbol_entry_size(bfd) (adata (bfd).symbol_entry_size) 441 #define obj_aout_subformat(bfd) (adata (bfd).subformat) 442 #define obj_aout_external_syms(bfd) (adata (bfd).external_syms) 443 #define obj_aout_external_sym_count(bfd) (adata (bfd).external_sym_count) 444 #define obj_aout_sym_window(bfd) (adata (bfd).sym_window) 445 #define obj_aout_external_strings(bfd) (adata (bfd).external_strings) 446 #define obj_aout_external_string_size(bfd) (adata (bfd).external_string_size) 447 #define obj_aout_string_window(bfd) (adata (bfd).string_window) 448 #define obj_aout_sym_hashes(bfd) (adata (bfd).sym_hashes) 449 #define obj_aout_dynamic_info(bfd) (adata (bfd).dynamic_info) 450 451 /* We take the address of the first element of an asymbol to ensure that the 452 macro is only ever applied to an asymbol. */ 453 #define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd)) 454 455 /* Information we keep for each a.out section. This is currently only 456 used by the a.out backend linker. */ 457 458 struct aout_section_data_struct 459 { 460 /* The unswapped relocation entries for this section. */ 461 void * relocs; 462 }; 463 464 #define aout_section_data(s) \ 465 ((struct aout_section_data_struct *) (s)->used_by_bfd) 466 467 #define set_aout_section_data(s,v) \ 468 ((s)->used_by_bfd = (void *)&(v)->relocs) 469 470 /* Prototype declarations for functions defined in aoutx.h. */ 471 472 extern bfd_boolean NAME (aout, squirt_out_relocs) 473 (bfd *, asection *); 474 475 extern bfd_boolean NAME (aout, make_sections) 476 (bfd *); 477 478 extern const bfd_target * NAME (aout, some_aout_object_p) 479 (bfd *, struct internal_exec *, const bfd_target *(*) (bfd *)); 480 481 extern bfd_boolean NAME (aout, mkobject) 482 (bfd *); 483 484 extern enum machine_type NAME (aout, machine_type) 485 (enum bfd_architecture, unsigned long, bfd_boolean *); 486 487 extern bfd_boolean NAME (aout, set_arch_mach) 488 (bfd *, enum bfd_architecture, unsigned long); 489 490 extern bfd_boolean NAME (aout, new_section_hook) 491 (bfd *, asection *); 492 493 extern bfd_boolean NAME (aout, set_section_contents) 494 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type); 495 496 extern asymbol * NAME (aout, make_empty_symbol) 497 (bfd *); 498 499 extern bfd_boolean NAME (aout, translate_symbol_table) 500 (bfd *, aout_symbol_type *, struct external_nlist *, bfd_size_type, 501 char *, bfd_size_type, bfd_boolean); 502 503 extern bfd_boolean NAME (aout, slurp_symbol_table) 504 (bfd *); 505 506 extern bfd_boolean NAME (aout, write_syms) 507 (bfd *); 508 509 extern void NAME (aout, reclaim_symbol_table) 510 (bfd *); 511 512 extern long NAME (aout, get_symtab_upper_bound) 513 (bfd *); 514 515 extern long NAME (aout, canonicalize_symtab) 516 (bfd *, asymbol **); 517 518 extern void NAME (aout, swap_ext_reloc_in) 519 (bfd *, struct reloc_ext_external *, arelent *, asymbol **, 520 bfd_size_type); 521 522 extern void NAME (aout, swap_std_reloc_in) 523 (bfd *, struct reloc_std_external *, arelent *, asymbol **, 524 bfd_size_type); 525 526 extern reloc_howto_type * NAME (aout, reloc_type_lookup) 527 (bfd *, bfd_reloc_code_real_type); 528 529 extern reloc_howto_type * NAME (aout, reloc_name_lookup) 530 (bfd *, const char *); 531 532 extern bfd_boolean NAME (aout, slurp_reloc_table) 533 (bfd *, sec_ptr, asymbol **); 534 535 extern long NAME (aout, canonicalize_reloc) 536 (bfd *, sec_ptr, arelent **, asymbol **); 537 538 extern long NAME (aout, get_reloc_upper_bound) 539 (bfd *, sec_ptr); 540 541 extern void NAME (aout, reclaim_reloc) 542 (bfd *, sec_ptr); 543 544 extern alent * NAME (aout, get_lineno) 545 (bfd *, asymbol *); 546 547 extern void NAME (aout, print_symbol) 548 (bfd *, void *, asymbol *, bfd_print_symbol_type); 549 550 extern void NAME (aout, get_symbol_info) 551 (bfd *, asymbol *, symbol_info *); 552 553 extern bfd_boolean NAME (aout, find_nearest_line) 554 (bfd *, asymbol **, asection *, bfd_vma, 555 const char **, const char **, unsigned int *, unsigned int *); 556 557 extern long NAME (aout, read_minisymbols) 558 (bfd *, bfd_boolean, void * *, unsigned int *); 559 560 extern asymbol * NAME (aout, minisymbol_to_symbol) 561 (bfd *, bfd_boolean, const void *, asymbol *); 562 563 extern int NAME (aout, sizeof_headers) 564 (bfd *, struct bfd_link_info *); 565 566 extern bfd_boolean NAME (aout, adjust_sizes_and_vmas) 567 (bfd *); 568 569 extern void NAME (aout, swap_exec_header_in) 570 (bfd *, struct external_exec *, struct internal_exec *); 571 572 extern void NAME (aout, swap_exec_header_out) 573 (bfd *, struct internal_exec *, struct external_exec *); 574 575 extern struct bfd_hash_entry * NAME (aout, link_hash_newfunc) 576 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); 577 578 extern bfd_boolean NAME (aout, link_hash_table_init) 579 (struct aout_link_hash_table *, bfd *, 580 struct bfd_hash_entry *(*) (struct bfd_hash_entry *, 581 struct bfd_hash_table *, 582 const char *), 583 unsigned int); 584 585 extern struct bfd_link_hash_table * NAME (aout, link_hash_table_create) 586 (bfd *); 587 588 extern bfd_boolean NAME (aout, link_add_symbols) 589 (bfd *, struct bfd_link_info *); 590 591 extern bfd_boolean NAME (aout, final_link) 592 (bfd *, struct bfd_link_info *, 593 void (*) (bfd *, file_ptr *, file_ptr *, file_ptr *)); 594 595 extern bfd_boolean NAME (aout, bfd_free_cached_info) 596 (bfd *); 597 598 #define aout_32_find_inliner_info _bfd_nosymbols_find_inliner_info 599 #if 0 /* Are these needed? */ 600 #define aout_16_find_inliner_info _bfd_nosymbols_find_inliner_info 601 #define aout_64_find_inliner_info _bfd_nosymbols_find_inliner_info 602 #endif 603 604 /* A.out uses the generic versions of these routines... */ 605 606 #define aout_16_get_section_contents _bfd_generic_get_section_contents 607 608 #define aout_32_get_section_contents _bfd_generic_get_section_contents 609 610 #define aout_64_get_section_contents _bfd_generic_get_section_contents 611 #ifndef NO_WRITE_HEADER_KLUDGE 612 #define NO_WRITE_HEADER_KLUDGE 0 613 #endif 614 615 #ifndef aout_32_bfd_is_local_label_name 616 #define aout_32_bfd_is_local_label_name bfd_generic_is_local_label_name 617 #endif 618 619 #ifndef aout_32_bfd_is_target_special_symbol 620 #define aout_32_bfd_is_target_special_symbol _bfd_bool_bfd_asymbol_false 621 #endif 622 623 #ifndef WRITE_HEADERS 624 #define WRITE_HEADERS(abfd, execp) \ 625 { \ 626 if (adata(abfd).magic == undecided_magic) \ 627 NAME (aout, adjust_sizes_and_vmas) (abfd); \ 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