bfd/libaout.h

   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 \f
 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 \f
 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) */