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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (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) 169 PARAMS ((bfd *)); 170 171 /* zmagic files only. For go32, the length of the exec header contributes 172 to the size of the text section in the file for alignment purposes but 173 does *not* get counted in the length of the text section. */ 174 unsigned char exec_header_not_counted; 175 176 /* Callback from the add symbols phase of the linker code to handle 177 a dynamic object. */ 178 bfd_boolean (*add_dynamic_symbols) 179 PARAMS ((bfd *, struct bfd_link_info *, struct external_nlist **, 180 bfd_size_type *, char **)); 181 182 /* Callback from the add symbols phase of the linker code to handle 183 adding a single symbol to the global linker hash table. */ 184 bfd_boolean (*add_one_symbol) 185 PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword, 186 asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean, 187 struct bfd_link_hash_entry **)); 188 189 /* Called to handle linking a dynamic object. */ 190 bfd_boolean (*link_dynamic_object) 191 PARAMS ((struct bfd_link_info *, bfd *)); 192 193 /* Called for each global symbol being written out by the linker. 194 This should write out the dynamic symbol information. */ 195 bfd_boolean (*write_dynamic_symbol) 196 PARAMS ((bfd *, struct bfd_link_info *, struct aout_link_hash_entry *)); 197 198 /* If this callback is not NULL, the linker calls it for each reloc. 199 RELOC is a pointer to the unswapped reloc. If *SKIP is set to 200 TRUE, the reloc will be skipped. *RELOCATION may be changed to 201 change the effects of the relocation. */ 202 bfd_boolean (*check_dynamic_reloc) 203 PARAMS ((struct bfd_link_info *info, bfd *input_bfd, 204 asection *input_section, struct aout_link_hash_entry *h, 205 PTR reloc, bfd_byte *contents, bfd_boolean *skip, 206 bfd_vma *relocation)); 207 208 /* Called at the end of a link to finish up any dynamic linking 209 information. */ 210 bfd_boolean (*finish_dynamic_link) 211 PARAMS ((bfd *, struct bfd_link_info *)); 212 }; 213 #define aout_backend_info(abfd) \ 214 ((const struct aout_backend_data *)((abfd)->xvec->backend_data)) 215 216 /* This is the layout in memory of a "struct exec" while we process it. 217 All 'lengths' are given as a number of bytes. 218 All 'alignments' are for relinkable files only; an alignment of 219 'n' indicates the corresponding segment must begin at an 220 address that is a multiple of (2**n). */ 221 222 struct internal_exec 223 { 224 long a_info; /* Magic number and flags, packed. */ 225 bfd_vma a_text; /* Length of text, in bytes. */ 226 bfd_vma a_data; /* Length of data, in bytes. */ 227 bfd_vma a_bss; /* Length of uninitialized data area in mem. */ 228 bfd_vma a_syms; /* Length of symbol table data in file. */ 229 bfd_vma a_entry; /* Start address. */ 230 bfd_vma a_trsize; /* Length of text's relocation info, in bytes. */ 231 bfd_vma a_drsize; /* Length of data's relocation info, in bytes. */ 232 /* Added for i960 */ 233 bfd_vma a_tload; /* Text runtime load address. */ 234 bfd_vma a_dload; /* Data runtime load address. */ 235 unsigned char a_talign; /* Alignment of text segment. */ 236 unsigned char a_dalign; /* Alignment of data segment. */ 237 unsigned char a_balign; /* Alignment of bss segment. */ 238 char a_relaxable; /* Enough info for linker relax. */ 239 }; 240 241 /* Magic number is written 242 < MSB > 243 3130292827262524232221201918171615141312111009080706050403020100 244 < FLAGS >< MACHINE TYPE >< MAGIC NUMBER > */ 245 246 /* Magic number for NetBSD is 247 <MSB > 248 3130292827262524232221201918171615141312111009080706050403020100 249 < FLAGS >< MACHINE TYPE >< MAGIC NUMBER > */ 250 251 enum machine_type 252 { 253 M_UNKNOWN = 0, 254 M_68010 = 1, 255 M_68020 = 2, 256 M_SPARC = 3, 257 /* Skip a bunch so we don't run into any of SUN's numbers. */ 258 /* Make these up for the ns32k. */ 259 M_NS32032 = (64), /* NS32032 running ? */ 260 M_NS32532 = (64 + 5), /* NS32532 running mach. */ 261 M_386 = 100, 262 M_29K = 101, /* AMD 29000. */ 263 M_386_DYNIX = 102, /* Sequent running dynix. */ 264 M_ARM = 103, /* Advanced Risc Machines ARM. */ 265 M_SPARCLET = 131, /* SPARClet = M_SPARC + 128. */ 266 M_386_NETBSD = 134, /* NetBSD/i386 binary. */ 267 M_68K_NETBSD = 135, /* NetBSD/m68k binary. */ 268 M_68K4K_NETBSD = 136, /* NetBSD/m68k4k binary. */ 269 M_532_NETBSD = 137, /* NetBSD/ns32k binary. */ 270 M_SPARC_NETBSD = 138, /* NetBSD/sparc binary. */ 271 M_PMAX_NETBSD = 139, /* NetBSD/pmax (MIPS little-endian) binary. */ 272 M_VAX_NETBSD = 140, /* NetBSD/vax binary. */ 273 M_ALPHA_NETBSD = 141, /* NetBSD/alpha binary. */ 274 M_ARM6_NETBSD = 143, /* NetBSD/arm32 binary. */ 275 M_SPARCLET_1 = 147, /* 0x93, reserved. */ 276 M_POWERPC_NETBSD = 149, /* NetBSD/powerpc (big-endian) binary. */ 277 M_VAX4K_NETBSD = 150, /* NetBSD/vax 4K pages binary. */ 278 M_MIPS1 = 151, /* MIPS R2000/R3000 binary. */ 279 M_MIPS2 = 152, /* MIPS R4000/R6000 binary. */ 280 M_88K_OPENBSD = 153, /* OpenBSD/m88k binary. */ 281 M_HPPA_OPENBSD = 154, /* OpenBSD/hppa binary. */ 282 M_SPARC64_NETBSD = 156, /* NetBSD/sparc64 binary. */ 283 M_X86_64_NETBSD = 157, /* NetBSD/amd64 binary. */ 284 M_SPARCLET_2 = 163, /* 0xa3, reserved. */ 285 M_SPARCLET_3 = 179, /* 0xb3, reserved. */ 286 M_SPARCLET_4 = 195, /* 0xc3, reserved. */ 287 M_HP200 = 200, /* HP 200 (68010) BSD binary. */ 288 M_HP300 = (300 % 256), /* HP 300 (68020+68881) BSD binary. */ 289 M_HPUX = (0x20c % 256), /* HP 200/300 HPUX binary. */ 290 M_SPARCLET_5 = 211, /* 0xd3, reserved. */ 291 M_SPARCLET_6 = 227, /* 0xe3, reserved. */ 292 /*M_SPARCLET_7 = 243 / * 0xf3, reserved. */ 293 M_SPARCLITE_LE = 243, 294 M_CRIS = 255 /* Axis CRIS binary. */ 295 }; 296 297 #define N_DYNAMIC(exec) ((exec).a_info & 0x80000000) 298 299 #ifndef N_MAGIC 300 # define N_MAGIC(exec) ((exec).a_info & 0xffff) 301 #endif 302 303 #ifndef N_MACHTYPE 304 # define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff)) 305 #endif 306 307 #ifndef N_FLAGS 308 # define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff) 309 #endif 310 311 #ifndef N_SET_INFO 312 # define N_SET_INFO(exec, magic, type, flags) \ 313 ((exec).a_info = ((magic) & 0xffff) \ 314 | (((int)(type) & 0xff) << 16) \ 315 | (((flags) & 0xff) << 24)) 316 #endif 317 318 #ifndef N_SET_DYNAMIC 319 # define N_SET_DYNAMIC(exec, dynamic) \ 320 ((exec).a_info = (dynamic) ? (long) ((exec).a_info | 0x80000000) : \ 321 ((exec).a_info & 0x7fffffff)) 322 #endif 323 324 #ifndef N_SET_MAGIC 325 # define N_SET_MAGIC(exec, magic) \ 326 ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff))) 327 #endif 328 329 #ifndef N_SET_MACHTYPE 330 # define N_SET_MACHTYPE(exec, machtype) \ 331 ((exec).a_info = \ 332 ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16)) 333 #endif 334 335 #ifndef N_SET_FLAGS 336 # define N_SET_FLAGS(exec, flags) \ 337 ((exec).a_info = \ 338 ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24)) 339 #endif 340 341 typedef struct aout_symbol 342 { 343 asymbol symbol; 344 short desc; 345 char other; 346 unsigned char type; 347 } aout_symbol_type; 348 349 /* The `tdata' struct for all a.out-like object file formats. 350 Various things depend on this struct being around any time an a.out 351 file is being handled. An example is dbxread.c in GDB. */ 352 353 struct aoutdata 354 { 355 struct internal_exec *hdr; /* Exec file header. */ 356 aout_symbol_type *symbols; /* Symtab for input bfd. */ 357 358 /* For ease, we do this. */ 359 asection *textsec; 360 asection *datasec; 361 asection *bsssec; 362 363 /* We remember these offsets so that after check_file_format, we have 364 no dependencies on the particular format of the exec_hdr. */ 365 file_ptr sym_filepos; 366 file_ptr str_filepos; 367 368 /* Size of a relocation entry in external form. */ 369 unsigned reloc_entry_size; 370 371 /* Size of a symbol table entry in external form. */ 372 unsigned symbol_entry_size; 373 374 /* Page size - needed for alignment of demand paged files. */ 375 unsigned long page_size; 376 377 /* Segment size - needed for alignment of demand paged files. */ 378 unsigned long segment_size; 379 380 /* Zmagic disk block size - need to align the start of the text 381 section in ZMAGIC binaries. Normally the same as page_size. */ 382 unsigned long zmagic_disk_block_size; 383 384 unsigned exec_bytes_size; 385 unsigned vma_adjusted : 1; 386 387 /* Used when a bfd supports several highly similar formats. */ 388 enum 389 { 390 default_format = 0, 391 /* Used on HP 9000/300 running HP/UX. See hp300hpux.c. */ 392 gnu_encap_format, 393 /* Used on Linux, 386BSD, etc. See include/aout/aout64.h. */ 394 q_magic_format 395 } subformat; 396 397 enum 398 { 399 undecided_magic = 0, 400 z_magic, 401 o_magic, 402 n_magic 403 } magic; 404 405 /* A buffer for find_nearest_line. */ 406 char *line_buf; 407 408 /* The external symbol information. */ 409 struct external_nlist *external_syms; 410 bfd_size_type external_sym_count; 411 bfd_window sym_window; 412 char *external_strings; 413 bfd_size_type external_string_size; 414 bfd_window string_window; 415 struct aout_link_hash_entry **sym_hashes; 416 417 /* A pointer for shared library information. */ 418 PTR dynamic_info; 419 420 /* A mapping from local symbols to offsets into the global offset 421 table, used when linking on SunOS. This is indexed by the symbol 422 index. */ 423 bfd_vma *local_got_offsets; 424 }; 425 426 struct aout_data_struct 427 { 428 struct aoutdata a; 429 struct internal_exec e; 430 }; 431 432 #define adata(bfd) ((bfd)->tdata.aout_data->a) 433 #define exec_hdr(bfd) (adata (bfd).hdr) 434 #define obj_aout_symbols(bfd) (adata (bfd).symbols) 435 #define obj_textsec(bfd) (adata (bfd).textsec) 436 #define obj_datasec(bfd) (adata (bfd).datasec) 437 #define obj_bsssec(bfd) (adata (bfd).bsssec) 438 #define obj_sym_filepos(bfd) (adata (bfd).sym_filepos) 439 #define obj_str_filepos(bfd) (adata (bfd).str_filepos) 440 #define obj_reloc_entry_size(bfd) (adata (bfd).reloc_entry_size) 441 #define obj_symbol_entry_size(bfd) (adata (bfd).symbol_entry_size) 442 #define obj_aout_subformat(bfd) (adata (bfd).subformat) 443 #define obj_aout_external_syms(bfd) (adata (bfd).external_syms) 444 #define obj_aout_external_sym_count(bfd) (adata (bfd).external_sym_count) 445 #define obj_aout_sym_window(bfd) (adata (bfd).sym_window) 446 #define obj_aout_external_strings(bfd) (adata (bfd).external_strings) 447 #define obj_aout_external_string_size(bfd) (adata (bfd).external_string_size) 448 #define obj_aout_string_window(bfd) (adata (bfd).string_window) 449 #define obj_aout_sym_hashes(bfd) (adata (bfd).sym_hashes) 450 #define obj_aout_dynamic_info(bfd) (adata (bfd).dynamic_info) 451 452 /* We take the address of the first element of an asymbol to ensure that the 453 macro is only ever applied to an asymbol. */ 454 #define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd)) 455 456 /* Information we keep for each a.out section. This is currently only 457 used by the a.out backend linker. */ 458 459 struct aout_section_data_struct 460 { 461 /* The unswapped relocation entries for this section. */ 462 PTR relocs; 463 }; 464 465 #define aout_section_data(s) \ 466 ((struct aout_section_data_struct *) (s)->used_by_bfd) 467 468 #define set_aout_section_data(s,v) \ 469 ((s)->used_by_bfd = (PTR)&(v)->relocs) 470 471 /* Prototype declarations for functions defined in aoutx.h. */ 472 473 extern bfd_boolean NAME(aout,squirt_out_relocs) 474 PARAMS ((bfd *, asection *)); 475 476 extern bfd_boolean NAME(aout,make_sections) 477 PARAMS ((bfd *)); 478 479 extern const bfd_target * NAME(aout,some_aout_object_p) 480 PARAMS ((bfd *, struct internal_exec *, const bfd_target *(*) (bfd *))); 481 482 extern bfd_boolean NAME(aout,mkobject) 483 PARAMS ((bfd *)); 484 485 extern enum machine_type NAME(aout,machine_type) 486 PARAMS ((enum bfd_architecture, unsigned long, bfd_boolean *)); 487 488 extern bfd_boolean NAME(aout,set_arch_mach) 489 PARAMS ((bfd *, enum bfd_architecture, unsigned long)); 490 491 extern bfd_boolean NAME(aout,new_section_hook) 492 PARAMS ((bfd *, asection *)); 493 494 extern bfd_boolean NAME(aout,set_section_contents) 495 PARAMS ((bfd *, sec_ptr, const PTR, file_ptr, bfd_size_type)); 496 497 extern asymbol * NAME(aout,make_empty_symbol) 498 PARAMS ((bfd *)); 499 500 extern bfd_boolean NAME(aout,translate_symbol_table) 501 PARAMS ((bfd *, aout_symbol_type *, struct external_nlist *, bfd_size_type, 502 char *, bfd_size_type, bfd_boolean)); 503 504 extern bfd_boolean NAME(aout,slurp_symbol_table) 505 PARAMS ((bfd *)); 506 507 extern bfd_boolean NAME(aout,write_syms) 508 PARAMS ((bfd *)); 509 510 extern void NAME(aout,reclaim_symbol_table) 511 PARAMS ((bfd *)); 512 513 extern long NAME(aout,get_symtab_upper_bound) 514 PARAMS ((bfd *)); 515 516 extern long NAME(aout,canonicalize_symtab) 517 PARAMS ((bfd *, asymbol **)); 518 519 extern void NAME(aout,swap_ext_reloc_in) 520 PARAMS ((bfd *, struct reloc_ext_external *, arelent *, asymbol **, 521 bfd_size_type)); 522 extern void NAME(aout,swap_std_reloc_in) 523 PARAMS ((bfd *, struct reloc_std_external *, arelent *, asymbol **, 524 bfd_size_type)); 525 526 extern reloc_howto_type * NAME(aout,reloc_type_lookup) 527 PARAMS ((bfd *, bfd_reloc_code_real_type)); 528 529 extern bfd_boolean NAME(aout,slurp_reloc_table) 530 PARAMS ((bfd *, sec_ptr, asymbol **)); 531 532 extern long NAME(aout,canonicalize_reloc) 533 PARAMS ((bfd *, sec_ptr, arelent **, asymbol **)); 534 535 extern long NAME(aout,get_reloc_upper_bound) 536 PARAMS ((bfd *, sec_ptr)); 537 538 extern void NAME(aout,reclaim_reloc) 539 PARAMS ((bfd *, sec_ptr)); 540 541 extern alent * NAME(aout,get_lineno) 542 PARAMS ((bfd *, asymbol *)); 543 544 extern void NAME(aout,print_symbol) 545 PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type)); 546 547 extern void NAME(aout,get_symbol_info) 548 PARAMS ((bfd *, asymbol *, symbol_info *)); 549 550 extern bfd_boolean NAME(aout,find_nearest_line) 551 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **, 552 const char **, unsigned int *)); 553 554 extern long NAME(aout,read_minisymbols) 555 PARAMS ((bfd *, bfd_boolean, PTR *, unsigned int *)); 556 557 extern asymbol * NAME(aout,minisymbol_to_symbol) 558 PARAMS ((bfd *, bfd_boolean, const PTR, asymbol *)); 559 560 extern int NAME(aout,sizeof_headers) 561 PARAMS ((bfd *, bfd_boolean)); 562 563 extern bfd_boolean NAME(aout,adjust_sizes_and_vmas) 564 PARAMS ((bfd *, bfd_size_type *, file_ptr *)); 565 566 extern void NAME(aout,swap_exec_header_in) 567 PARAMS ((bfd *, struct external_exec *, struct internal_exec *)); 568 569 extern void NAME(aout,swap_exec_header_out) 570 PARAMS ((bfd *, struct internal_exec *, struct external_exec *)); 571 572 extern struct bfd_hash_entry * NAME(aout,link_hash_newfunc) 573 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); 574 575 extern bfd_boolean NAME(aout,link_hash_table_init) 576 PARAMS ((struct aout_link_hash_table *, bfd *, 577 struct bfd_hash_entry *(*) (struct bfd_hash_entry *, 578 struct bfd_hash_table *, 579 const char *))); 580 581 extern struct bfd_link_hash_table * NAME(aout,link_hash_table_create) 582 PARAMS ((bfd *)); 583 584 extern bfd_boolean NAME(aout,link_add_symbols) 585 PARAMS ((bfd *, struct bfd_link_info *)); 586 587 extern bfd_boolean NAME(aout,final_link) 588 PARAMS ((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 PARAMS ((bfd *)); 593 594 /* A.out uses the generic versions of these routines... */ 595 596 #define aout_16_get_section_contents _bfd_generic_get_section_contents 597 598 #define aout_32_get_section_contents _bfd_generic_get_section_contents 599 600 #define aout_64_get_section_contents _bfd_generic_get_section_contents 601 #ifndef NO_WRITE_HEADER_KLUDGE 602 #define NO_WRITE_HEADER_KLUDGE 0 603 #endif 604 605 #ifndef aout_32_bfd_is_local_label_name 606 #define aout_32_bfd_is_local_label_name bfd_generic_is_local_label_name 607 #endif 608 609 #ifndef aout_32_bfd_is_target_special_symbol 610 #define aout_32_bfd_is_target_special_symbol \ 611 ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false) 612 #endif 613 614 #ifndef WRITE_HEADERS 615 #define WRITE_HEADERS(abfd, execp) \ 616 { \ 617 bfd_size_type text_size; /* Dummy vars. */ \ 618 file_ptr text_end; \ 619 if (adata(abfd).magic == undecided_magic) \ 620 NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end); \ 621 \ 622 execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE; \ 623 execp->a_entry = bfd_get_start_address (abfd); \ 624 \ 625 execp->a_trsize = ((obj_textsec (abfd)->reloc_count) * \ 626 obj_reloc_entry_size (abfd)); \ 627 execp->a_drsize = ((obj_datasec (abfd)->reloc_count) * \ 628 obj_reloc_entry_size (abfd)); \ 629 NAME(aout,swap_exec_header_out) (abfd, execp, &exec_bytes); \ 630 \ 631 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0 \ 632 || bfd_bwrite ((PTR) &exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE,\ 633 abfd) != EXEC_BYTES_SIZE) \ 634 return FALSE; \ 635 /* Now write out reloc info, followed by syms and strings. */ \ 636 \ 637 if (bfd_get_outsymbols (abfd) != (asymbol **) NULL \ 638 && bfd_get_symcount (abfd) != 0) \ 639 { \ 640 if (bfd_seek (abfd, (file_ptr) (N_SYMOFF(*execp)), SEEK_SET) != 0)\ 641 return FALSE; \ 642 \ 643 if (! NAME(aout,write_syms) (abfd)) \ 644 return FALSE; \ 645 } \ 646 \ 647 if (bfd_seek (abfd, (file_ptr) (N_TRELOFF (*execp)), SEEK_SET) != 0) \ 648 return FALSE; \ 649 if (!NAME(aout,squirt_out_relocs) (abfd, obj_textsec (abfd))) \ 650 return FALSE; \ 651 \ 652 if (bfd_seek (abfd, (file_ptr) (N_DRELOFF (*execp)), SEEK_SET) != 0) \ 653 return FALSE; \ 654 if (!NAME(aout,squirt_out_relocs) (abfd, obj_datasec (abfd))) \ 655 return FALSE; \ 656 } 657 #endif 658 659 /* Test if a read-only section can be merged with .text. This is 660 possible if: 661 662 1. Section has file contents and is read-only. 663 2. The VMA of the section is after the end of .text and before 664 the start of .data. 665 3. The image is demand-pageable (otherwise, a_text in the header 666 will not reflect the gap between .text and .data). */ 667 668 #define aout_section_merge_with_text_p(abfd, sec) \ 669 (((sec)->flags & (SEC_HAS_CONTENTS | SEC_READONLY)) == \ 670 (SEC_HAS_CONTENTS | SEC_READONLY) \ 671 && obj_textsec (abfd) != NULL \ 672 && obj_datasec (abfd) != NULL \ 673 && (sec)->vma >= (obj_textsec (abfd)->vma + \ 674 obj_textsec (abfd)->size) \ 675 && ((sec)->vma + (sec)->size) <= obj_datasec (abfd)->vma \ 676 && ((abfd)->flags & D_PAGED) != 0) 677 678 #endif /* ! defined (LIBAOUT_H) */ 679