bfd/libaout.h

   1 /* BFD back-end data structures for a.out (and similar) files.
   2    Copyright (C) 1990-2024 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 \f
  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   bool 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     (bool (*) (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 \f
 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   bool (*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   bool (*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   bool (*add_one_symbol)
 183     (struct bfd_link_info *, bfd *, const char *, flagword,
 184      asection *, bfd_vma, const char *, bool, bool,
 185      struct bfd_link_hash_entry **);
 186
 187   /* Called to handle linking a dynamic object.  */
 188   bool (*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   bool (*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   bool (*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, bool *skip,
 204      bfd_vma *relocation);
 205
 206   /* Called at the end of a link to finish up any dynamic linking
 207      information.  */
 208   bool (*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   i_magic
 364 };
 365
 366 struct aoutdata
 367 {
 368   struct internal_exec *hdr;            /* Exec file header.  */
 369   aout_symbol_type *symbols;            /* Symtab for input bfd.  */
 370
 371   /* For ease, we do this.  */
 372   asection *textsec;
 373   asection *datasec;
 374   asection *bsssec;
 375
 376   /* We remember these offsets so that after check_file_format, we have
 377      no dependencies on the particular format of the exec_hdr.  */
 378   file_ptr sym_filepos;
 379   file_ptr str_filepos;
 380
 381   /* Size of a relocation entry in external form.  */
 382   unsigned reloc_entry_size;
 383
 384   /* Size of a symbol table entry in external form.  */
 385   unsigned symbol_entry_size;
 386
 387   /* Page size - needed for alignment of demand paged files.  */
 388   unsigned long page_size;
 389
 390   /* Segment size - needed for alignment of demand paged files.  */
 391   unsigned long segment_size;
 392
 393   /* Zmagic disk block size - need to align the start of the text
 394      section in ZMAGIC binaries.  Normally the same as page_size.  */
 395   unsigned long zmagic_disk_block_size;
 396
 397   unsigned exec_bytes_size;
 398   unsigned vma_adjusted : 1;
 399
 400   /* Used when a bfd supports several highly similar formats.  */
 401   enum aout_subformat subformat;
 402
 403   enum aout_magic 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   void * 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   void * 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 = (void *)&(v)->relocs)
 470
 471 /* Prototype declarations for functions defined in aoutx.h.  */
 472
 473 extern bool NAME (aout, squirt_out_relocs)
 474   (bfd *, asection *);
 475
 476 extern bool NAME (aout, make_sections)
 477   (bfd *);
 478
 479 extern bfd_cleanup NAME (aout, some_aout_object_p)
 480   (bfd *, struct internal_exec *, bfd_cleanup (*) (bfd *));
 481
 482 extern bool NAME (aout, mkobject)
 483   (bfd *);
 484
 485 extern enum machine_type NAME (aout, machine_type)
 486   (enum bfd_architecture, unsigned long, bool *);
 487
 488 extern bool NAME (aout, set_arch_mach)
 489   (bfd *, enum bfd_architecture, unsigned long);
 490
 491 extern bool NAME (aout, new_section_hook)
 492   (bfd *, asection *);
 493
 494 extern bool NAME (aout, set_section_contents)
 495   (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
 496
 497 extern asymbol * NAME (aout, make_empty_symbol)
 498   (bfd *);
 499
 500 extern bool NAME (aout, translate_symbol_table)
 501   (bfd *, aout_symbol_type *, struct external_nlist *, bfd_size_type,
 502    char *, bfd_size_type, bool);
 503
 504 extern bool NAME (aout, slurp_symbol_table)
 505   (bfd *);
 506
 507 extern bool NAME (aout, write_syms)
 508   (bfd *);
 509
 510 extern void NAME (aout, reclaim_symbol_table)
 511   (bfd *);
 512
 513 extern long NAME (aout, get_symtab_upper_bound)
 514   (bfd *);
 515
 516 extern long NAME (aout, canonicalize_symtab)
 517   (bfd *, asymbol **);
 518
 519 extern void NAME (aout, swap_ext_reloc_in)
 520   (bfd *, struct reloc_ext_external *, arelent *, asymbol **,
 521    bfd_size_type);
 522
 523 extern void NAME (aout, swap_std_reloc_in)
 524   (bfd *, struct reloc_std_external *, arelent *, asymbol **,
 525    bfd_size_type);
 526
 527 extern reloc_howto_type * NAME (aout, reloc_type_lookup)
 528   (bfd *, bfd_reloc_code_real_type);
 529
 530 extern reloc_howto_type * NAME (aout, reloc_name_lookup)
 531   (bfd *, const char *);
 532
 533 extern bool NAME (aout, slurp_reloc_table)
 534   (bfd *, sec_ptr, asymbol **);
 535
 536 extern long NAME (aout, canonicalize_reloc)
 537   (bfd *, sec_ptr, arelent **, asymbol **);
 538
 539 extern long NAME (aout, get_reloc_upper_bound)
 540   (bfd *, sec_ptr);
 541
 542 extern void NAME (aout, reclaim_reloc)
 543   (bfd *, sec_ptr);
 544
 545 extern alent * NAME (aout, get_lineno)
 546   (bfd *, asymbol *);
 547
 548 extern void NAME (aout, print_symbol)
 549   (bfd *, void *, asymbol *, bfd_print_symbol_type);
 550
 551 extern void NAME (aout, get_symbol_info)
 552   (bfd *, asymbol *, symbol_info *);
 553
 554 extern bool NAME (aout, find_nearest_line)
 555   (bfd *, asymbol **, asection *, bfd_vma,
 556    const char **, const char **, unsigned int *, unsigned int *);
 557
 558 extern long NAME (aout, read_minisymbols)
 559   (bfd *, bool, void * *, unsigned int *);
 560
 561 extern asymbol * NAME (aout, minisymbol_to_symbol)
 562   (bfd *, bool, const void *, asymbol *);
 563
 564 extern int NAME (aout, sizeof_headers)
 565   (bfd *, struct bfd_link_info *);
 566
 567 extern bool NAME (aout, adjust_sizes_and_vmas)
 568   (bfd *);
 569
 570 extern void NAME (aout, swap_exec_header_in)
 571   (bfd *, struct external_exec *, struct internal_exec *);
 572
 573 extern bool NAME (aout, swap_exec_header_out)
 574   (bfd *, struct internal_exec *, struct external_exec *);
 575
 576 extern struct bfd_hash_entry * NAME (aout, link_hash_newfunc)
 577   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 578
 579 extern bool NAME (aout, link_hash_table_init)
 580   (struct aout_link_hash_table *, bfd *,
 581    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 582                                struct bfd_hash_table *,
 583                                const char *),
 584    unsigned int);
 585
 586 extern struct bfd_link_hash_table * NAME (aout, link_hash_table_create)
 587   (bfd *);
 588
 589 extern bool NAME (aout, link_add_symbols)
 590   (bfd *, struct bfd_link_info *);
 591
 592 extern bool NAME (aout, final_link)
 593   (bfd *, struct bfd_link_info *,
 594    void (*) (bfd *, file_ptr *, file_ptr *, file_ptr *));
 595
 596 extern bool NAME (aout, bfd_free_cached_info)
 597   (bfd *);
 598
 599 #define aout_32_find_inliner_info       _bfd_nosymbols_find_inliner_info
 600 #if 0   /* Are these needed? */
 601 #define aout_16_find_inliner_info       _bfd_nosymbols_find_inliner_info
 602 #define aout_64_find_inliner_info       _bfd_nosymbols_find_inliner_info
 603 #endif
 604
 605 /* A.out uses the generic versions of these routines...  */
 606
 607 #define aout_16_get_section_contents    _bfd_generic_get_section_contents
 608
 609 #define aout_32_get_section_contents    _bfd_generic_get_section_contents
 610
 611 #define aout_64_get_section_contents    _bfd_generic_get_section_contents
 612
 613 #ifndef aout_32_bfd_is_local_label_name
 614 #define aout_32_bfd_is_local_label_name bfd_generic_is_local_label_name
 615 #endif
 616
 617 #ifndef aout_32_bfd_is_target_special_symbol
 618 #define aout_32_bfd_is_target_special_symbol _bfd_bool_bfd_asymbol_false
 619 #endif
 620
 621 #ifndef WRITE_HEADERS
 622 #define WRITE_HEADERS(abfd, execp)                                      \
 623   {                                                                     \
 624     if (adata(abfd).magic == undecided_magic)                           \
 625       NAME (aout, adjust_sizes_and_vmas) (abfd);                        \
 626                                                                         \
 627     execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE;      \
 628     execp->a_entry = bfd_get_start_address (abfd);                      \
 629                                                                         \
 630     execp->a_trsize = ((obj_textsec (abfd)->reloc_count)                \
 631                        * obj_reloc_entry_size (abfd));                  \
 632     execp->a_drsize = ((obj_datasec (abfd)->reloc_count)                \
 633                        * obj_reloc_entry_size (abfd));                  \
 634     if (!NAME (aout, swap_exec_header_out) (abfd, execp, &exec_bytes))  \
 635       return false;                                                     \
 636                                                                         \
 637     if (bfd_seek (abfd, 0, SEEK_SET) != 0                               \
 638         || bfd_write (&exec_bytes, EXEC_BYTES_SIZE,                     \
 639                       abfd) != EXEC_BYTES_SIZE)                         \
 640       return false;                                                     \
 641     /* Now write out reloc info, followed by syms and strings.  */      \
 642                                                                         \
 643     if (bfd_get_outsymbols (abfd) != NULL                               \
 644         && bfd_get_symcount (abfd) != 0)                                \
 645       {                                                                 \
 646         if (bfd_seek (abfd, N_SYMOFF (execp), SEEK_SET) != 0)           \
 647           return false;                                                 \
 648                                                                         \
 649         if (! NAME (aout, write_syms) (abfd))                           \
 650           return false;                                                 \
 651       }                                                                 \
 652                                                                         \
 653     if (bfd_seek (abfd, N_TRELOFF (execp), SEEK_SET) != 0)              \
 654       return false;                                                     \
 655     if (!NAME (aout, squirt_out_relocs) (abfd, obj_textsec (abfd)))     \
 656       return false;                                                     \
 657                                                                         \
 658     if (bfd_seek (abfd, N_DRELOFF (execp), SEEK_SET) != 0)              \
 659       return false;                                                     \
 660     if (!NAME (aout, squirt_out_relocs) (abfd, obj_datasec (abfd)))     \
 661       return false;                                                     \
 662   }
 663 #endif
 664
 665 /* Test if a read-only section can be merged with .text.  This is
 666    possible if:
 667
 668    1. Section has file contents and is read-only.
 669    2. The VMA of the section is after the end of .text and before
 670       the start of .data.
 671    3. The image is demand-pageable (otherwise, a_text in the header
 672       will not reflect the gap between .text and .data).  */
 673
 674 #define aout_section_merge_with_text_p(abfd, sec)                       \
 675   (((sec)->flags & (SEC_HAS_CONTENTS | SEC_READONLY)) ==                \
 676       (SEC_HAS_CONTENTS | SEC_READONLY)                                 \
 677    && obj_textsec (abfd) != NULL                                        \
 678    && obj_datasec (abfd) != NULL                                        \
 679    && (sec)->vma >= (obj_textsec (abfd)->vma +                          \
 680                      obj_textsec (abfd)->size)                          \
 681    && ((sec)->vma + (sec)->size) <= obj_datasec (abfd)->vma             \
 682    && ((abfd)->flags & D_PAGED) != 0)
 683
 684 #endif /* ! defined (LIBAOUT_H) */