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, 2005, 2006, 2007
   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 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  22    MA 02110-1301, USA.  */
  23
  24 #ifndef LIBAOUT_H
  25 #define LIBAOUT_H
  26
  27 /* We try to encapsulate the differences in the various a.out file
  28    variants in a few routines, and otherwise share large masses of code.
  29    This means we only have to fix bugs in one place, most of the time.  */
  30
  31 #include "bfdlink.h"
  32
  33 /* Macros for accessing components in an aout header.  */
  34
  35 #define H_PUT_64  bfd_h_put_64
  36 #define H_PUT_32  bfd_h_put_32
  37 #define H_PUT_16  bfd_h_put_16
  38 #define H_PUT_8   bfd_h_put_8
  39 #define H_PUT_S64 bfd_h_put_signed_64
  40 #define H_PUT_S32 bfd_h_put_signed_32
  41 #define H_PUT_S16 bfd_h_put_signed_16
  42 #define H_PUT_S8  bfd_h_put_signed_8
  43 #define H_GET_64  bfd_h_get_64
  44 #define H_GET_32  bfd_h_get_32
  45 #define H_GET_16  bfd_h_get_16
  46 #define H_GET_8   bfd_h_get_8
  47 #define H_GET_S64 bfd_h_get_signed_64
  48 #define H_GET_S32 bfd_h_get_signed_32
  49 #define H_GET_S16 bfd_h_get_signed_16
  50 #define H_GET_S8  bfd_h_get_signed_8
  51
  52 /* Parameterize the a.out code based on whether it is being built
  53    for a 32-bit architecture or a 64-bit architecture.  */
  54 /* Do not "beautify" the CONCAT* macro args.  Traditional C will not
  55    remove whitespace added here, and thus will fail to concatenate
  56    the tokens.  */
  57 #if ARCH_SIZE==64
  58 #define GET_WORD  H_GET_64
  59 #define GET_SWORD H_GET_S64
  60 #define GET_MAGIC H_GET_32
  61 #define PUT_WORD  H_PUT_64
  62 #define PUT_MAGIC H_PUT_32
  63 #ifndef NAME
  64 #define NAME(x,y) CONCAT3 (x,_64_,y)
  65 #endif
  66 #define JNAME(x) CONCAT2 (x,_64)
  67 #define BYTES_IN_WORD 8
  68 #else
  69 #if ARCH_SIZE==16
  70 #define GET_WORD  H_GET_16
  71 #define GET_SWORD H_GET_S16
  72 #define GET_MAGIC H_GET_16
  73 #define PUT_WORD  H_PUT_16
  74 #define PUT_MAGIC H_PUT_16
  75 #ifndef NAME
  76 #define NAME(x,y) CONCAT3 (x,_16_,y)
  77 #endif
  78 #define JNAME(x) CONCAT2 (x,_16)
  79 #define BYTES_IN_WORD 2
  80 #else /* ARCH_SIZE == 32 */
  81 #define GET_WORD  H_GET_32
  82 #define GET_SWORD H_GET_S32
  83 #define GET_MAGIC H_GET_32
  84 #define PUT_WORD  H_PUT_32
  85 #define PUT_MAGIC H_PUT_32
  86 #ifndef NAME
  87 #define NAME(x,y) CONCAT3 (x,_32_,y)
  88 #endif
  89 #define JNAME(x) CONCAT2 (x,_32)
  90 #define BYTES_IN_WORD 4
  91 #endif /* ARCH_SIZE==32 */
  92 #endif /* ARCH_SIZE==64 */
  93
  94 /* Declare at file level, since used in parameter lists, which have
  95    weird scope.  */
  96 struct external_exec;
  97 struct external_nlist;
  98 struct reloc_ext_external;
  99 struct reloc_std_external;
 100 \f
 101 /* a.out backend linker hash table entries.  */
 102
 103 struct aout_link_hash_entry
 104 {
 105   struct bfd_link_hash_entry root;
 106   /* Whether this symbol has been written out.  */
 107   bfd_boolean written;
 108   /* Symbol index in output file.  */
 109   int indx;
 110 };
 111
 112 /* a.out backend linker hash table.  */
 113
 114 struct aout_link_hash_table
 115 {
 116   struct bfd_link_hash_table root;
 117 };
 118
 119 /* Look up an entry in an a.out link hash table.  */
 120
 121 #define aout_link_hash_lookup(table, string, create, copy, follow) \
 122   ((struct aout_link_hash_entry *) \
 123    bfd_link_hash_lookup (&(table)->root, (string), (create), (copy), (follow)))
 124
 125 /* Traverse an a.out link hash table.  */
 126
 127 #define aout_link_hash_traverse(table, func, info)                      \
 128   (bfd_link_hash_traverse                                               \
 129    (&(table)->root,                                                     \
 130     (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func),    \
 131     (info)))
 132
 133 /* Get the a.out link hash table from the info structure.  This is
 134    just a cast.  */
 135
 136 #define aout_hash_table(p) ((struct aout_link_hash_table *) ((p)->hash))
 137 \f
 138 /* Back-end information for various a.out targets.  */
 139 struct aout_backend_data
 140 {
 141   /* Are ZMAGIC files mapped contiguously?  If so, the text section may
 142      need more padding, if the segment size (granularity for memory access
 143      control) is larger than the page size.  */
 144   unsigned char zmagic_mapped_contiguous;
 145   /* If this flag is set, ZMAGIC/NMAGIC file headers get mapped in with the
 146      text section, which starts immediately after the file header.
 147      If not, the text section starts on the next page.  */
 148   unsigned char text_includes_header;
 149
 150   /* If this flag is set, then if the entry address is not in the
 151      first SEGMENT_SIZE bytes of the text section, it is taken to be
 152      the address of the start of the text section.  This can be useful
 153      for kernels.  */
 154   unsigned char entry_is_text_address;
 155
 156   /* The value to pass to N_SET_FLAGS.  */
 157   unsigned char exec_hdr_flags;
 158
 159   /* If the text section VMA isn't specified, and we need an absolute
 160      address, use this as the default.  If we're producing a relocatable
 161      file, zero is always used.  */
 162   /* ?? Perhaps a callback would be a better choice?  Will this do anything
 163      reasonable for a format that handles multiple CPUs with different
 164      load addresses for each?  */
 165   bfd_vma default_text_vma;
 166
 167   /* Callback for setting the page and segment sizes, if they can't be
 168      trivially determined from the architecture.  */
 169   bfd_boolean (*set_sizes) (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     (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     (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     (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     (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     (struct bfd_link_info *info, bfd *input_bfd,
 204      asection *input_section, struct aout_link_hash_entry *h,
 205      void * 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) (bfd *, struct bfd_link_info *);
 211 };
 212 #define aout_backend_info(abfd) \
 213         ((const struct aout_backend_data *)((abfd)->xvec->backend_data))
 214
 215 /* This is the layout in memory of a "struct exec" while we process it.
 216    All 'lengths' are given as a number of bytes.
 217    All 'alignments' are for relinkable files only;  an alignment of
 218         'n' indicates the corresponding segment must begin at an
 219         address that is a multiple of (2**n).  */
 220
 221 struct internal_exec
 222 {
 223   long a_info;                  /* Magic number and flags, packed.  */
 224   bfd_vma a_text;               /* Length of text, in bytes.  */
 225   bfd_vma a_data;               /* Length of data, in bytes.  */
 226   bfd_vma a_bss;                /* Length of uninitialized data area in mem.  */
 227   bfd_vma a_syms;               /* Length of symbol table data in file.  */
 228   bfd_vma a_entry;              /* Start address.  */
 229   bfd_vma a_trsize;             /* Length of text's relocation info, in bytes.  */
 230   bfd_vma a_drsize;             /* Length of data's relocation info, in bytes.  */
 231   /* Added for i960 */
 232   bfd_vma a_tload;              /* Text runtime load address.  */
 233   bfd_vma a_dload;              /* Data runtime load address.  */
 234   unsigned char a_talign;       /* Alignment of text segment.  */
 235   unsigned char a_dalign;       /* Alignment of data segment.  */
 236   unsigned char a_balign;       /* Alignment of bss segment.  */
 237   char a_relaxable;             /* Enough info for linker relax.  */
 238 };
 239
 240 /* Magic number is written
 241    < MSB          >
 242    3130292827262524232221201918171615141312111009080706050403020100
 243    < FLAGS        >< MACHINE TYPE ><  MAGIC NUMBER                >  */
 244
 245 /* Magic number for NetBSD is
 246    <MSB           >
 247    3130292827262524232221201918171615141312111009080706050403020100
 248    < FLAGS    >< MACHINE TYPE     ><  MAGIC NUMBER                >  */
 249
 250 enum machine_type
 251 {
 252   M_UNKNOWN = 0,
 253   M_68010 = 1,
 254   M_68020 = 2,
 255   M_SPARC = 3,
 256   /* Skip a bunch so we don't run into any of SUN's numbers.  */
 257   /* Make these up for the ns32k.  */
 258   M_NS32032 = (64),       /* NS32032 running ?  */
 259   M_NS32532 = (64 + 5),   /* NS32532 running mach.  */
 260   M_386 = 100,
 261   M_29K = 101,            /* AMD 29000.  */
 262   M_386_DYNIX = 102,      /* Sequent running dynix.  */
 263   M_ARM = 103,            /* Advanced Risc Machines ARM.  */
 264   M_SPARCLET = 131,       /* SPARClet = M_SPARC + 128.  */
 265   M_386_NETBSD = 134,     /* NetBSD/i386 binary.  */
 266   M_68K_NETBSD = 135,     /* NetBSD/m68k binary.  */
 267   M_68K4K_NETBSD = 136,   /* NetBSD/m68k4k binary.  */
 268   M_532_NETBSD = 137,     /* NetBSD/ns32k binary.  */
 269   M_SPARC_NETBSD = 138,   /* NetBSD/sparc binary.  */
 270   M_PMAX_NETBSD = 139,    /* NetBSD/pmax (MIPS little-endian) binary.  */
 271   M_VAX_NETBSD = 140,     /* NetBSD/vax binary.  */
 272   M_ALPHA_NETBSD = 141,   /* NetBSD/alpha binary.  */
 273   M_ARM6_NETBSD = 143,    /* NetBSD/arm32 binary.  */
 274   M_SPARCLET_1 = 147,     /* 0x93, reserved.  */
 275   M_POWERPC_NETBSD = 149, /* NetBSD/powerpc (big-endian) binary.  */
 276   M_VAX4K_NETBSD = 150,   /* NetBSD/vax 4K pages binary.  */
 277   M_MIPS1 = 151,          /* MIPS R2000/R3000 binary.  */
 278   M_MIPS2 = 152,          /* MIPS R4000/R6000 binary.  */
 279   M_88K_OPENBSD = 153,    /* OpenBSD/m88k binary.  */
 280   M_HPPA_OPENBSD = 154,   /* OpenBSD/hppa binary.  */
 281   M_SPARC64_NETBSD = 156, /* NetBSD/sparc64 binary.  */
 282   M_X86_64_NETBSD = 157,  /* NetBSD/amd64 binary.  */
 283   M_SPARCLET_2 = 163,     /* 0xa3, reserved.  */
 284   M_SPARCLET_3 = 179,     /* 0xb3, reserved.  */
 285   M_SPARCLET_4 = 195,     /* 0xc3, reserved.  */
 286   M_HP200 = 200,          /* HP 200 (68010) BSD binary.  */
 287   M_HP300 = (300 % 256),  /* HP 300 (68020+68881) BSD binary.  */
 288   M_HPUX = (0x20c % 256), /* HP 200/300 HPUX binary.  */
 289   M_SPARCLET_5 = 211,     /* 0xd3, reserved.  */
 290   M_SPARCLET_6 = 227,     /* 0xe3, reserved.  */
 291 /*M_SPARCLET_7 = 243     / * 0xf3, reserved.  */
 292   M_SPARCLITE_LE = 243,
 293   M_CRIS = 255            /* Axis CRIS binary.  */
 294 };
 295
 296 #define N_DYNAMIC(exec) ((exec).a_info & 0x80000000)
 297
 298 #ifndef N_MAGIC
 299 # define N_MAGIC(exec) ((exec).a_info & 0xffff)
 300 #endif
 301
 302 #ifndef N_MACHTYPE
 303 # define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
 304 #endif
 305
 306 #ifndef N_FLAGS
 307 # define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
 308 #endif
 309
 310 #ifndef N_SET_INFO
 311 # define N_SET_INFO(exec, magic, type, flags) \
 312 ((exec).a_info = ((magic) & 0xffff) \
 313  | (((int)(type) & 0xff) << 16) \
 314  | (((flags) & 0xff) << 24))
 315 #endif
 316
 317 #ifndef N_SET_DYNAMIC
 318 # define N_SET_DYNAMIC(exec, dynamic) \
 319 ((exec).a_info = (dynamic) ? (long) ((exec).a_info | 0x80000000) : \
 320 ((exec).a_info & 0x7fffffff))
 321 #endif
 322
 323 #ifndef N_SET_MAGIC
 324 # define N_SET_MAGIC(exec, magic) \
 325 ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
 326 #endif
 327
 328 #ifndef N_SET_MACHTYPE
 329 # define N_SET_MACHTYPE(exec, machtype) \
 330 ((exec).a_info = \
 331  ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
 332 #endif
 333
 334 #ifndef N_SET_FLAGS
 335 # define N_SET_FLAGS(exec, flags) \
 336 ((exec).a_info = \
 337  ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
 338 #endif
 339
 340 typedef struct aout_symbol
 341 {
 342   asymbol symbol;
 343   short desc;
 344   char other;
 345   unsigned char type;
 346 } aout_symbol_type;
 347
 348 /* The `tdata' struct for all a.out-like object file formats.
 349    Various things depend on this struct being around any time an a.out
 350    file is being handled.  An example is dbxread.c in GDB.  */
 351
 352 enum aout_subformat {
 353   default_format = 0,
 354   /* Used on HP 9000/300 running HP/UX.  See hp300hpux.c.  */
 355   gnu_encap_format,
 356   /* Used on Linux, 386BSD, etc.  See include/aout/aout64.h.  */
 357   q_magic_format
 358 };
 359
 360 enum aout_magic {
 361   undecided_magic = 0,
 362   z_magic,
 363   o_magic,
 364   n_magic
 365 };
 366
 367 struct aoutdata
 368 {
 369   struct internal_exec *hdr;            /* Exec file header.  */
 370   aout_symbol_type *symbols;            /* Symtab for input bfd.  */
 371
 372   /* For ease, we do this.  */
 373   asection *textsec;
 374   asection *datasec;
 375   asection *bsssec;
 376
 377   /* We remember these offsets so that after check_file_format, we have
 378      no dependencies on the particular format of the exec_hdr.  */
 379   file_ptr sym_filepos;
 380   file_ptr str_filepos;
 381
 382   /* Size of a relocation entry in external form.  */
 383   unsigned reloc_entry_size;
 384
 385   /* Size of a symbol table entry in external form.  */
 386   unsigned symbol_entry_size;
 387
 388   /* Page size - needed for alignment of demand paged files.  */
 389   unsigned long page_size;
 390
 391   /* Segment size - needed for alignment of demand paged files.  */
 392   unsigned long segment_size;
 393
 394   /* Zmagic disk block size - need to align the start of the text
 395      section in ZMAGIC binaries.  Normally the same as page_size.  */
 396   unsigned long zmagic_disk_block_size;
 397
 398   unsigned exec_bytes_size;
 399   unsigned vma_adjusted : 1;
 400
 401   /* Used when a bfd supports several highly similar formats.  */
 402   enum aout_subformat subformat;
 403
 404   enum aout_magic magic;
 405
 406   /* A buffer for find_nearest_line.  */
 407   char *line_buf;
 408
 409   /* The external symbol information.  */
 410   struct external_nlist *external_syms;
 411   bfd_size_type external_sym_count;
 412   bfd_window sym_window;
 413   char *external_strings;
 414   bfd_size_type external_string_size;
 415   bfd_window string_window;
 416   struct aout_link_hash_entry **sym_hashes;
 417
 418   /* A pointer for shared library information.  */
 419   void * dynamic_info;
 420
 421   /* A mapping from local symbols to offsets into the global offset
 422      table, used when linking on SunOS.  This is indexed by the symbol
 423      index.  */
 424   bfd_vma *local_got_offsets;
 425 };
 426
 427 struct  aout_data_struct
 428 {
 429   struct aoutdata a;
 430   struct internal_exec e;
 431 };
 432
 433 #define adata(bfd)                         ((bfd)->tdata.aout_data->a)
 434 #define exec_hdr(bfd)                      (adata (bfd).hdr)
 435 #define obj_aout_symbols(bfd)              (adata (bfd).symbols)
 436 #define obj_textsec(bfd)                   (adata (bfd).textsec)
 437 #define obj_datasec(bfd)                   (adata (bfd).datasec)
 438 #define obj_bsssec(bfd)                    (adata (bfd).bsssec)
 439 #define obj_sym_filepos(bfd)               (adata (bfd).sym_filepos)
 440 #define obj_str_filepos(bfd)               (adata (bfd).str_filepos)
 441 #define obj_reloc_entry_size(bfd)          (adata (bfd).reloc_entry_size)
 442 #define obj_symbol_entry_size(bfd)         (adata (bfd).symbol_entry_size)
 443 #define obj_aout_subformat(bfd)            (adata (bfd).subformat)
 444 #define obj_aout_external_syms(bfd)        (adata (bfd).external_syms)
 445 #define obj_aout_external_sym_count(bfd)   (adata (bfd).external_sym_count)
 446 #define obj_aout_sym_window(bfd)           (adata (bfd).sym_window)
 447 #define obj_aout_external_strings(bfd)     (adata (bfd).external_strings)
 448 #define obj_aout_external_string_size(bfd) (adata (bfd).external_string_size)
 449 #define obj_aout_string_window(bfd)        (adata (bfd).string_window)
 450 #define obj_aout_sym_hashes(bfd)           (adata (bfd).sym_hashes)
 451 #define obj_aout_dynamic_info(bfd)         (adata (bfd).dynamic_info)
 452
 453 /* We take the address of the first element of an asymbol to ensure that the
 454    macro is only ever applied to an asymbol.  */
 455 #define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd))
 456
 457 /* Information we keep for each a.out section.  This is currently only
 458    used by the a.out backend linker.  */
 459
 460 struct aout_section_data_struct
 461 {
 462   /* The unswapped relocation entries for this section.  */
 463   void * relocs;
 464 };
 465
 466 #define aout_section_data(s) \
 467   ((struct aout_section_data_struct *) (s)->used_by_bfd)
 468
 469 #define set_aout_section_data(s,v) \
 470   ((s)->used_by_bfd = (void *)&(v)->relocs)
 471
 472 /* Prototype declarations for functions defined in aoutx.h.  */
 473
 474 extern bfd_boolean NAME (aout, squirt_out_relocs)
 475   (bfd *, asection *);
 476
 477 extern bfd_boolean NAME (aout, make_sections)
 478   (bfd *);
 479
 480 extern const bfd_target * NAME (aout, some_aout_object_p)
 481   (bfd *, struct internal_exec *, const bfd_target *(*) (bfd *));
 482
 483 extern bfd_boolean NAME (aout, mkobject)
 484   (bfd *);
 485
 486 extern enum machine_type NAME (aout, machine_type)
 487   (enum bfd_architecture, unsigned long, bfd_boolean *);
 488
 489 extern bfd_boolean NAME (aout, set_arch_mach)
 490   (bfd *, enum bfd_architecture, unsigned long);
 491
 492 extern bfd_boolean NAME (aout, new_section_hook)
 493   (bfd *, asection *);
 494
 495 extern bfd_boolean NAME (aout, set_section_contents)
 496   (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
 497
 498 extern asymbol * NAME (aout, make_empty_symbol)
 499   (bfd *);
 500
 501 extern bfd_boolean NAME (aout, translate_symbol_table)
 502   (bfd *, aout_symbol_type *, struct external_nlist *, bfd_size_type,
 503            char *, bfd_size_type, bfd_boolean);
 504
 505 extern bfd_boolean NAME (aout, slurp_symbol_table)
 506   (bfd *);
 507
 508 extern bfd_boolean NAME (aout, write_syms)
 509   (bfd *);
 510
 511 extern void NAME (aout, reclaim_symbol_table)
 512   (bfd *);
 513
 514 extern long NAME (aout, get_symtab_upper_bound)
 515   (bfd *);
 516
 517 extern long NAME (aout, canonicalize_symtab)
 518   (bfd *, asymbol **);
 519
 520 extern void NAME (aout, swap_ext_reloc_in)
 521   (bfd *, struct reloc_ext_external *, arelent *, asymbol **,
 522    bfd_size_type);
 523
 524 extern void NAME (aout, swap_std_reloc_in)
 525   (bfd *, struct reloc_std_external *, arelent *, asymbol **,
 526    bfd_size_type);
 527
 528 extern reloc_howto_type * NAME (aout, reloc_type_lookup)
 529   (bfd *, bfd_reloc_code_real_type);
 530
 531 extern reloc_howto_type * NAME (aout, reloc_name_lookup)
 532   (bfd *, const char *);
 533
 534 extern bfd_boolean NAME (aout, slurp_reloc_table)
 535   (bfd *, sec_ptr, asymbol **);
 536
 537 extern long NAME (aout, canonicalize_reloc)
 538   (bfd *, sec_ptr, arelent **, asymbol **);
 539
 540 extern long NAME (aout, get_reloc_upper_bound)
 541   (bfd *, sec_ptr);
 542
 543 extern void NAME (aout, reclaim_reloc)
 544   (bfd *, sec_ptr);
 545
 546 extern alent * NAME (aout, get_lineno)
 547   (bfd *, asymbol *);
 548
 549 extern void NAME (aout, print_symbol)
 550   (bfd *, void *, asymbol *, bfd_print_symbol_type);
 551
 552 extern void NAME (aout, get_symbol_info)
 553   (bfd *, asymbol *, symbol_info *);
 554
 555 extern bfd_boolean NAME (aout, find_nearest_line)
 556   (bfd *, asection *, asymbol **, bfd_vma, const char **,
 557    const char **, unsigned int *);
 558
 559 extern long NAME (aout, read_minisymbols)
 560   (bfd *, bfd_boolean, void * *, unsigned int *);
 561
 562 extern asymbol * NAME (aout, minisymbol_to_symbol)
 563   (bfd *, bfd_boolean, const void *, asymbol *);
 564
 565 extern int NAME (aout, sizeof_headers)
 566   (bfd *, struct bfd_link_info *);
 567
 568 extern bfd_boolean NAME (aout, adjust_sizes_and_vmas)
 569   (bfd *, bfd_size_type *, file_ptr *);
 570
 571 extern void NAME (aout, swap_exec_header_in)
 572   (bfd *, struct external_exec *, struct internal_exec *);
 573
 574 extern void NAME (aout, swap_exec_header_out)
 575   (bfd *, struct internal_exec *, struct external_exec *);
 576
 577 extern struct bfd_hash_entry * NAME (aout, link_hash_newfunc)
 578   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 579
 580 extern bfd_boolean NAME (aout, link_hash_table_init)
 581   (struct aout_link_hash_table *, bfd *,
 582    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 583                                struct bfd_hash_table *,
 584                                const char *),
 585    unsigned int);
 586
 587 extern struct bfd_link_hash_table * NAME (aout, link_hash_table_create)
 588   (bfd *);
 589
 590 extern bfd_boolean NAME (aout, link_add_symbols)
 591   (bfd *, struct bfd_link_info *);
 592
 593 extern bfd_boolean NAME (aout, final_link)
 594   (bfd *, struct bfd_link_info *,
 595    void (*) (bfd *, file_ptr *, file_ptr *, file_ptr *));
 596
 597 extern bfd_boolean NAME (aout, bfd_free_cached_info)
 598   (bfd *);
 599
 600 #define aout_32_find_inliner_info       _bfd_nosymbols_find_inliner_info
 601 #if 0   /* Are these needed? */
 602 #define aout_16_find_inliner_info       _bfd_nosymbols_find_inliner_info
 603 #define aout_64_find_inliner_info       _bfd_nosymbols_find_inliner_info
 604 #endif
 605
 606 /* A.out uses the generic versions of these routines...  */
 607
 608 #define aout_16_get_section_contents    _bfd_generic_get_section_contents
 609
 610 #define aout_32_get_section_contents    _bfd_generic_get_section_contents
 611
 612 #define aout_64_get_section_contents    _bfd_generic_get_section_contents
 613 #ifndef NO_WRITE_HEADER_KLUDGE
 614 #define NO_WRITE_HEADER_KLUDGE 0
 615 #endif
 616
 617 #ifndef aout_32_bfd_is_local_label_name
 618 #define aout_32_bfd_is_local_label_name bfd_generic_is_local_label_name
 619 #endif
 620
 621 #ifndef aout_32_bfd_is_target_special_symbol
 622 #define aout_32_bfd_is_target_special_symbol \
 623   ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
 624 #endif
 625
 626 #ifndef WRITE_HEADERS
 627 #define WRITE_HEADERS(abfd, execp)                                            \
 628       {                                                                       \
 629         bfd_size_type text_size; /* Dummy vars.  */                           \
 630         file_ptr text_end;                                                    \
 631                                                                               \
 632         if (adata(abfd).magic == undecided_magic)                             \
 633           NAME (aout, adjust_sizes_and_vmas) (abfd, & text_size, & text_end); \
 634                                                                               \
 635         execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE;        \
 636         execp->a_entry = bfd_get_start_address (abfd);                        \
 637                                                                               \
 638         execp->a_trsize = ((obj_textsec (abfd)->reloc_count) *                \
 639                            obj_reloc_entry_size (abfd));                      \
 640         execp->a_drsize = ((obj_datasec (abfd)->reloc_count) *                \
 641                            obj_reloc_entry_size (abfd));                      \
 642         NAME (aout, swap_exec_header_out) (abfd, execp, & exec_bytes);        \
 643                                                                               \
 644         if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0                      \
 645             || bfd_bwrite (& exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE,     \
 646                           abfd) != EXEC_BYTES_SIZE)                           \
 647           return FALSE;                                                       \
 648         /* Now write out reloc info, followed by syms and strings.  */        \
 649                                                                               \
 650         if (bfd_get_outsymbols (abfd) != NULL                                 \
 651             && bfd_get_symcount (abfd) != 0)                                  \
 652           {                                                                   \
 653             if (bfd_seek (abfd, (file_ptr) (N_SYMOFF(*execp)), SEEK_SET) != 0)\
 654               return FALSE;                                                   \
 655                                                                               \
 656             if (! NAME (aout, write_syms) (abfd))                             \
 657               return FALSE;                                                   \
 658           }                                                                   \
 659                                                                               \
 660         if (bfd_seek (abfd, (file_ptr) (N_TRELOFF (*execp)), SEEK_SET) != 0)  \
 661           return FALSE;                                                       \
 662         if (!NAME (aout, squirt_out_relocs) (abfd, obj_textsec (abfd)))       \
 663           return FALSE;                                                       \
 664                                                                               \
 665         if (bfd_seek (abfd, (file_ptr) (N_DRELOFF (*execp)), SEEK_SET) != 0)  \
 666           return FALSE;                                                       \
 667         if (!NAME (aout, squirt_out_relocs) (abfd, obj_datasec (abfd)))       \
 668           return FALSE;                                                       \
 669       }
 670 #endif
 671
 672 /* Test if a read-only section can be merged with .text.  This is
 673    possible if:
 674
 675    1. Section has file contents and is read-only.
 676    2. The VMA of the section is after the end of .text and before
 677       the start of .data.
 678    3. The image is demand-pageable (otherwise, a_text in the header
 679       will not reflect the gap between .text and .data).  */
 680
 681 #define aout_section_merge_with_text_p(abfd, sec)                       \
 682   (((sec)->flags & (SEC_HAS_CONTENTS | SEC_READONLY)) ==                \
 683       (SEC_HAS_CONTENTS | SEC_READONLY)                                 \
 684    && obj_textsec (abfd) != NULL                                        \
 685    && obj_datasec (abfd) != NULL                                        \
 686    && (sec)->vma >= (obj_textsec (abfd)->vma +                          \
 687                      obj_textsec (abfd)->size)                          \
 688    && ((sec)->vma + (sec)->size) <= obj_datasec (abfd)->vma             \
 689    && ((abfd)->flags & D_PAGED) != 0)
 690
 691 #endif /* ! defined (LIBAOUT_H) */