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
   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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 (*) (struct bfd_link_hash_entry *, void *)) (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) (bfd *);
 169
 170   /* zmagic files only. For go32, the length of the exec header contributes
 171      to the size of the text section in the file for alignment purposes but
 172      does *not* get counted in the length of the text section. */
 173   unsigned char exec_header_not_counted;
 174
 175   /* Callback from the add symbols phase of the linker code to handle
 176      a dynamic object.  */
 177   bfd_boolean (*add_dynamic_symbols)
 178     (bfd *, struct bfd_link_info *, struct external_nlist **,
 179      bfd_size_type *, char **);
 180
 181   /* Callback from the add symbols phase of the linker code to handle
 182      adding a single symbol to the global linker hash table.  */
 183   bfd_boolean (*add_one_symbol)
 184     (struct bfd_link_info *, bfd *, const char *, flagword,
 185      asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean,
 186      struct bfd_link_hash_entry **);
 187
 188   /* Called to handle linking a dynamic object.  */
 189   bfd_boolean (*link_dynamic_object)
 190     (struct bfd_link_info *, bfd *);
 191
 192   /* Called for each global symbol being written out by the linker.
 193      This should write out the dynamic symbol information.  */
 194   bfd_boolean (*write_dynamic_symbol)
 195     (bfd *, struct bfd_link_info *, struct aout_link_hash_entry *);
 196
 197   /* If this callback is not NULL, the linker calls it for each reloc.
 198      RELOC is a pointer to the unswapped reloc.  If *SKIP is set to
 199      TRUE, the reloc will be skipped.  *RELOCATION may be changed to
 200      change the effects of the relocation.  */
 201   bfd_boolean (*check_dynamic_reloc)
 202     (struct bfd_link_info *info, bfd *input_bfd,
 203      asection *input_section, struct aout_link_hash_entry *h,
 204      void * reloc, bfd_byte *contents, bfd_boolean *skip,
 205      bfd_vma *relocation);
 206
 207   /* Called at the end of a link to finish up any dynamic linking
 208      information.  */
 209   bfd_boolean (*finish_dynamic_link) (bfd *, struct bfd_link_info *);
 210 };
 211 #define aout_backend_info(abfd) \
 212         ((const struct aout_backend_data *)((abfd)->xvec->backend_data))
 213
 214 /* This is the layout in memory of a "struct exec" while we process it.
 215    All 'lengths' are given as a number of bytes.
 216    All 'alignments' are for relinkable files only;  an alignment of
 217         'n' indicates the corresponding segment must begin at an
 218         address that is a multiple of (2**n).  */
 219
 220 struct internal_exec
 221 {
 222   long a_info;                  /* Magic number and flags, packed.  */
 223   bfd_vma a_text;               /* Length of text, in bytes.  */
 224   bfd_vma a_data;               /* Length of data, in bytes.  */
 225   bfd_vma a_bss;                /* Length of uninitialized data area in mem.  */
 226   bfd_vma a_syms;               /* Length of symbol table data in file.  */
 227   bfd_vma a_entry;              /* Start address.  */
 228   bfd_vma a_trsize;             /* Length of text's relocation info, in bytes.  */
 229   bfd_vma a_drsize;             /* Length of data's relocation info, in bytes.  */
 230   /* Added for i960 */
 231   bfd_vma a_tload;              /* Text runtime load address.  */
 232   bfd_vma a_dload;              /* Data runtime load address.  */
 233   unsigned char a_talign;       /* Alignment of text segment.  */
 234   unsigned char a_dalign;       /* Alignment of data segment.  */
 235   unsigned char a_balign;       /* Alignment of bss segment.  */
 236   char a_relaxable;             /* Enough info for linker relax.  */
 237 };
 238
 239 /* Magic number is written
 240    < MSB          >
 241    3130292827262524232221201918171615141312111009080706050403020100
 242    < FLAGS        >< MACHINE TYPE ><  MAGIC NUMBER                >  */
 243
 244 /* Magic number for NetBSD is
 245    <MSB           >
 246    3130292827262524232221201918171615141312111009080706050403020100
 247    < FLAGS    >< MACHINE TYPE     ><  MAGIC NUMBER                >  */
 248
 249 enum machine_type
 250 {
 251   M_UNKNOWN = 0,
 252   M_68010 = 1,
 253   M_68020 = 2,
 254   M_SPARC = 3,
 255   /* Skip a bunch so we don't run into any of SUN's numbers.  */
 256   /* Make these up for the ns32k.  */
 257   M_NS32032 = (64),       /* NS32032 running ?  */
 258   M_NS32532 = (64 + 5),   /* NS32532 running mach.  */
 259   M_386 = 100,
 260   M_29K = 101,            /* AMD 29000.  */
 261   M_386_DYNIX = 102,      /* Sequent running dynix.  */
 262   M_ARM = 103,            /* Advanced Risc Machines ARM.  */
 263   M_SPARCLET = 131,       /* SPARClet = M_SPARC + 128.  */
 264   M_386_NETBSD = 134,     /* NetBSD/i386 binary.  */
 265   M_68K_NETBSD = 135,     /* NetBSD/m68k binary.  */
 266   M_68K4K_NETBSD = 136,   /* NetBSD/m68k4k binary.  */
 267   M_532_NETBSD = 137,     /* NetBSD/ns32k binary.  */
 268   M_SPARC_NETBSD = 138,   /* NetBSD/sparc binary.  */
 269   M_PMAX_NETBSD = 139,    /* NetBSD/pmax (MIPS little-endian) binary.  */
 270   M_VAX_NETBSD = 140,     /* NetBSD/vax binary.  */
 271   M_ALPHA_NETBSD = 141,   /* NetBSD/alpha binary.  */
 272   M_ARM6_NETBSD = 143,    /* NetBSD/arm32 binary.  */
 273   M_SPARCLET_1 = 147,     /* 0x93, reserved.  */
 274   M_POWERPC_NETBSD = 149, /* NetBSD/powerpc (big-endian) binary.  */
 275   M_VAX4K_NETBSD = 150,   /* NetBSD/vax 4K pages binary.  */
 276   M_MIPS1 = 151,          /* MIPS R2000/R3000 binary.  */
 277   M_MIPS2 = 152,          /* MIPS R4000/R6000 binary.  */
 278   M_88K_OPENBSD = 153,    /* OpenBSD/m88k binary.  */
 279   M_HPPA_OPENBSD = 154,   /* OpenBSD/hppa binary.  */
 280   M_SPARC64_NETBSD = 156, /* NetBSD/sparc64 binary.  */
 281   M_X86_64_NETBSD = 157,  /* NetBSD/amd64 binary.  */
 282   M_SPARCLET_2 = 163,     /* 0xa3, reserved.  */
 283   M_SPARCLET_3 = 179,     /* 0xb3, reserved.  */
 284   M_SPARCLET_4 = 195,     /* 0xc3, reserved.  */
 285   M_HP200 = 200,          /* HP 200 (68010) BSD binary.  */
 286   M_HP300 = (300 % 256),  /* HP 300 (68020+68881) BSD binary.  */
 287   M_HPUX = (0x20c % 256), /* HP 200/300 HPUX binary.  */
 288   M_SPARCLET_5 = 211,     /* 0xd3, reserved.  */
 289   M_SPARCLET_6 = 227,     /* 0xe3, reserved.  */
 290 /*M_SPARCLET_7 = 243     / * 0xf3, reserved.  */
 291   M_SPARCLITE_LE = 243,
 292   M_CRIS = 255            /* Axis CRIS binary.  */
 293 };
 294
 295 #define N_DYNAMIC(exec) ((exec).a_info & 0x80000000)
 296
 297 #ifndef N_MAGIC
 298 # define N_MAGIC(exec) ((exec).a_info & 0xffff)
 299 #endif
 300
 301 #ifndef N_MACHTYPE
 302 # define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
 303 #endif
 304
 305 #ifndef N_FLAGS
 306 # define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
 307 #endif
 308
 309 #ifndef N_SET_INFO
 310 # define N_SET_INFO(exec, magic, type, flags) \
 311 ((exec).a_info = ((magic) & 0xffff) \
 312  | (((int)(type) & 0xff) << 16) \
 313  | (((flags) & 0xff) << 24))
 314 #endif
 315
 316 #ifndef N_SET_DYNAMIC
 317 # define N_SET_DYNAMIC(exec, dynamic) \
 318 ((exec).a_info = (dynamic) ? (long) ((exec).a_info | 0x80000000) : \
 319 ((exec).a_info & 0x7fffffff))
 320 #endif
 321
 322 #ifndef N_SET_MAGIC
 323 # define N_SET_MAGIC(exec, magic) \
 324 ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
 325 #endif
 326
 327 #ifndef N_SET_MACHTYPE
 328 # define N_SET_MACHTYPE(exec, machtype) \
 329 ((exec).a_info = \
 330  ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
 331 #endif
 332
 333 #ifndef N_SET_FLAGS
 334 # define N_SET_FLAGS(exec, flags) \
 335 ((exec).a_info = \
 336  ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
 337 #endif
 338
 339 typedef struct aout_symbol
 340 {
 341   asymbol symbol;
 342   short desc;
 343   char other;
 344   unsigned char type;
 345 } aout_symbol_type;
 346
 347 /* The `tdata' struct for all a.out-like object file formats.
 348    Various things depend on this struct being around any time an a.out
 349    file is being handled.  An example is dbxread.c in GDB.  */
 350
 351 struct aoutdata
 352 {
 353   struct internal_exec *hdr;            /* Exec file header.  */
 354   aout_symbol_type *symbols;            /* Symtab for input bfd.  */
 355
 356   /* For ease, we do this.  */
 357   asection *textsec;
 358   asection *datasec;
 359   asection *bsssec;
 360
 361   /* We remember these offsets so that after check_file_format, we have
 362      no dependencies on the particular format of the exec_hdr.  */
 363   file_ptr sym_filepos;
 364   file_ptr str_filepos;
 365
 366   /* Size of a relocation entry in external form.  */
 367   unsigned reloc_entry_size;
 368
 369   /* Size of a symbol table entry in external form.  */
 370   unsigned symbol_entry_size;
 371
 372   /* Page size - needed for alignment of demand paged files.  */
 373   unsigned long page_size;
 374
 375   /* Segment size - needed for alignment of demand paged files.  */
 376   unsigned long segment_size;
 377
 378   /* Zmagic disk block size - need to align the start of the text
 379      section in ZMAGIC binaries.  Normally the same as page_size.  */
 380   unsigned long zmagic_disk_block_size;
 381
 382   unsigned exec_bytes_size;
 383   unsigned vma_adjusted : 1;
 384
 385   /* Used when a bfd supports several highly similar formats.  */
 386   enum
 387     {
 388       default_format = 0,
 389       /* Used on HP 9000/300 running HP/UX.  See hp300hpux.c.  */
 390       gnu_encap_format,
 391       /* Used on Linux, 386BSD, etc.  See include/aout/aout64.h.  */
 392       q_magic_format
 393     } subformat;
 394
 395   enum
 396     {
 397       undecided_magic = 0,
 398       z_magic,
 399       o_magic,
 400       n_magic
 401     } magic;
 402
 403   /* A buffer for find_nearest_line.  */
 404   char *line_buf;
 405
 406   /* The external symbol information.  */
 407   struct external_nlist *external_syms;
 408   bfd_size_type external_sym_count;
 409   bfd_window sym_window;
 410   char *external_strings;
 411   bfd_size_type external_string_size;
 412   bfd_window string_window;
 413   struct aout_link_hash_entry **sym_hashes;
 414
 415   /* A pointer for shared library information.  */
 416   void * dynamic_info;
 417
 418   /* A mapping from local symbols to offsets into the global offset
 419      table, used when linking on SunOS.  This is indexed by the symbol
 420      index.  */
 421   bfd_vma *local_got_offsets;
 422 };
 423
 424 struct  aout_data_struct
 425 {
 426   struct aoutdata a;
 427   struct internal_exec e;
 428 };
 429
 430 #define adata(bfd)                         ((bfd)->tdata.aout_data->a)
 431 #define exec_hdr(bfd)                      (adata (bfd).hdr)
 432 #define obj_aout_symbols(bfd)              (adata (bfd).symbols)
 433 #define obj_textsec(bfd)                   (adata (bfd).textsec)
 434 #define obj_datasec(bfd)                   (adata (bfd).datasec)
 435 #define obj_bsssec(bfd)                    (adata (bfd).bsssec)
 436 #define obj_sym_filepos(bfd)               (adata (bfd).sym_filepos)
 437 #define obj_str_filepos(bfd)               (adata (bfd).str_filepos)
 438 #define obj_reloc_entry_size(bfd)          (adata (bfd).reloc_entry_size)
 439 #define obj_symbol_entry_size(bfd)         (adata (bfd).symbol_entry_size)
 440 #define obj_aout_subformat(bfd)            (adata (bfd).subformat)
 441 #define obj_aout_external_syms(bfd)        (adata (bfd).external_syms)
 442 #define obj_aout_external_sym_count(bfd)   (adata (bfd).external_sym_count)
 443 #define obj_aout_sym_window(bfd)           (adata (bfd).sym_window)
 444 #define obj_aout_external_strings(bfd)     (adata (bfd).external_strings)
 445 #define obj_aout_external_string_size(bfd) (adata (bfd).external_string_size)
 446 #define obj_aout_string_window(bfd)        (adata (bfd).string_window)
 447 #define obj_aout_sym_hashes(bfd)           (adata (bfd).sym_hashes)
 448 #define obj_aout_dynamic_info(bfd)         (adata (bfd).dynamic_info)
 449
 450 /* We take the address of the first element of an asymbol to ensure that the
 451    macro is only ever applied to an asymbol.  */
 452 #define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd))
 453
 454 /* Information we keep for each a.out section.  This is currently only
 455    used by the a.out backend linker.  */
 456
 457 struct aout_section_data_struct
 458 {
 459   /* The unswapped relocation entries for this section.  */
 460   void * relocs;
 461 };
 462
 463 #define aout_section_data(s) \
 464   ((struct aout_section_data_struct *) (s)->used_by_bfd)
 465
 466 #define set_aout_section_data(s,v) \
 467   ((s)->used_by_bfd = (void *)&(v)->relocs)
 468
 469 /* Prototype declarations for functions defined in aoutx.h.  */
 470
 471 extern bfd_boolean NAME (aout, squirt_out_relocs)
 472   (bfd *, asection *);
 473
 474 extern bfd_boolean NAME (aout, make_sections)
 475   (bfd *);
 476
 477 extern const bfd_target * NAME (aout, some_aout_object_p)
 478   (bfd *, struct internal_exec *, const bfd_target *(*) (bfd *));
 479
 480 extern bfd_boolean NAME (aout, mkobject)
 481   (bfd *);
 482
 483 extern enum machine_type NAME (aout, machine_type)
 484   (enum bfd_architecture, unsigned long, bfd_boolean *);
 485
 486 extern bfd_boolean NAME (aout, set_arch_mach)
 487   (bfd *, enum bfd_architecture, unsigned long);
 488
 489 extern bfd_boolean NAME (aout, new_section_hook)
 490   (bfd *, asection *);
 491
 492 extern bfd_boolean NAME (aout, set_section_contents)
 493   (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
 494
 495 extern asymbol * NAME (aout, make_empty_symbol)
 496   (bfd *);
 497
 498 extern bfd_boolean NAME (aout, translate_symbol_table)
 499   (bfd *, aout_symbol_type *, struct external_nlist *, bfd_size_type,
 500            char *, bfd_size_type, bfd_boolean);
 501
 502 extern bfd_boolean NAME (aout, slurp_symbol_table)
 503   (bfd *);
 504
 505 extern bfd_boolean NAME (aout, write_syms)
 506   (bfd *);
 507
 508 extern void NAME (aout, reclaim_symbol_table)
 509   (bfd *);
 510
 511 extern long NAME (aout, get_symtab_upper_bound)
 512   (bfd *);
 513
 514 extern long NAME (aout, canonicalize_symtab)
 515   (bfd *, asymbol **);
 516
 517 extern void NAME (aout, swap_ext_reloc_in)
 518   (bfd *, struct reloc_ext_external *, arelent *, asymbol **,
 519    bfd_size_type);
 520
 521 extern void NAME (aout, swap_std_reloc_in)
 522   (bfd *, struct reloc_std_external *, arelent *, asymbol **,
 523    bfd_size_type);
 524
 525 extern reloc_howto_type * NAME (aout, reloc_type_lookup)
 526   (bfd *, bfd_reloc_code_real_type);
 527
 528 extern bfd_boolean NAME (aout, slurp_reloc_table)
 529   (bfd *, sec_ptr, asymbol **);
 530
 531 extern long NAME (aout, canonicalize_reloc)
 532   (bfd *, sec_ptr, arelent **, asymbol **);
 533
 534 extern long NAME (aout, get_reloc_upper_bound)
 535   (bfd *, sec_ptr);
 536
 537 extern void NAME (aout, reclaim_reloc)
 538   (bfd *, sec_ptr);
 539
 540 extern alent * NAME (aout, get_lineno)
 541   (bfd *, asymbol *);
 542
 543 extern void NAME (aout, print_symbol)
 544   (bfd *, void *, asymbol *, bfd_print_symbol_type);
 545
 546 extern void NAME (aout, get_symbol_info)
 547   (bfd *, asymbol *, symbol_info *);
 548
 549 extern bfd_boolean NAME (aout, find_nearest_line)
 550   (bfd *, asection *, asymbol **, bfd_vma, const char **,
 551    const char **, unsigned int *);
 552
 553 extern long NAME (aout, read_minisymbols)
 554   (bfd *, bfd_boolean, void * *, unsigned int *);
 555
 556 extern asymbol * NAME (aout, minisymbol_to_symbol)
 557   (bfd *, bfd_boolean, const void *, asymbol *);
 558
 559 extern int NAME (aout, sizeof_headers)
 560   (bfd *, struct bfd_link_info *);
 561
 562 extern bfd_boolean NAME (aout, adjust_sizes_and_vmas)
 563   (bfd *, bfd_size_type *, file_ptr *);
 564
 565 extern void NAME (aout, swap_exec_header_in)
 566   (bfd *, struct external_exec *, struct internal_exec *);
 567
 568 extern void NAME (aout, swap_exec_header_out)
 569   (bfd *, struct internal_exec *, struct external_exec *);
 570
 571 extern struct bfd_hash_entry * NAME (aout, link_hash_newfunc)
 572   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 573
 574 extern bfd_boolean NAME (aout, link_hash_table_init)
 575   (struct aout_link_hash_table *, bfd *,
 576    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 577                                struct bfd_hash_table *,
 578                                const char *),
 579    unsigned int);
 580
 581 extern struct bfd_link_hash_table * NAME (aout, link_hash_table_create)
 582   (bfd *);
 583
 584 extern bfd_boolean NAME (aout, link_add_symbols)
 585   (bfd *, struct bfd_link_info *);
 586
 587 extern bfd_boolean NAME (aout, final_link)
 588   (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   (bfd *);
 593
 594 #define aout_32_find_inliner_info       _bfd_nosymbols_find_inliner_info
 595 #if 0   /* Are these needed? */
 596 #define aout_16_find_inliner_info       _bfd_nosymbols_find_inliner_info
 597 #define aout_64_find_inliner_info       _bfd_nosymbols_find_inliner_info
 598 #endif
 599
 600 /* A.out uses the generic versions of these routines...  */
 601
 602 #define aout_16_get_section_contents    _bfd_generic_get_section_contents
 603
 604 #define aout_32_get_section_contents    _bfd_generic_get_section_contents
 605
 606 #define aout_64_get_section_contents    _bfd_generic_get_section_contents
 607 #ifndef NO_WRITE_HEADER_KLUDGE
 608 #define NO_WRITE_HEADER_KLUDGE 0
 609 #endif
 610
 611 #ifndef aout_32_bfd_is_local_label_name
 612 #define aout_32_bfd_is_local_label_name bfd_generic_is_local_label_name
 613 #endif
 614
 615 #ifndef aout_32_bfd_is_target_special_symbol
 616 #define aout_32_bfd_is_target_special_symbol \
 617   ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
 618 #endif
 619
 620 #ifndef WRITE_HEADERS
 621 #define WRITE_HEADERS(abfd, execp)                                            \
 622       {                                                                       \
 623         bfd_size_type text_size; /* Dummy vars.  */                           \
 624         file_ptr text_end;                                                    \
 625                                                                               \
 626         if (adata(abfd).magic == undecided_magic)                             \
 627           NAME (aout, adjust_sizes_and_vmas) (abfd, & text_size, & text_end); \
 628                                                                               \
 629         execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE;        \
 630         execp->a_entry = bfd_get_start_address (abfd);                        \
 631                                                                               \
 632         execp->a_trsize = ((obj_textsec (abfd)->reloc_count) *                \
 633                            obj_reloc_entry_size (abfd));                      \
 634         execp->a_drsize = ((obj_datasec (abfd)->reloc_count) *                \
 635                            obj_reloc_entry_size (abfd));                      \
 636         NAME (aout, swap_exec_header_out) (abfd, execp, & exec_bytes);        \
 637                                                                               \
 638         if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0                      \
 639             || bfd_bwrite (& exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE,     \
 640                           abfd) != EXEC_BYTES_SIZE)                           \
 641           return FALSE;                                                       \
 642         /* Now write out reloc info, followed by syms and strings.  */        \
 643                                                                               \
 644         if (bfd_get_outsymbols (abfd) != NULL                                 \
 645             && bfd_get_symcount (abfd) != 0)                                  \
 646           {                                                                   \
 647             if (bfd_seek (abfd, (file_ptr) (N_SYMOFF(*execp)), SEEK_SET) != 0)\
 648               return FALSE;                                                   \
 649                                                                               \
 650             if (! NAME (aout, write_syms) (abfd))                             \
 651               return FALSE;                                                   \
 652           }                                                                   \
 653                                                                               \
 654         if (bfd_seek (abfd, (file_ptr) (N_TRELOFF (*execp)), SEEK_SET) != 0)  \
 655           return FALSE;                                                       \
 656         if (!NAME (aout, squirt_out_relocs) (abfd, obj_textsec (abfd)))       \
 657           return FALSE;                                                       \
 658                                                                               \
 659         if (bfd_seek (abfd, (file_ptr) (N_DRELOFF (*execp)), SEEK_SET) != 0)  \
 660           return FALSE;                                                       \
 661         if (!NAME (aout, squirt_out_relocs) (abfd, obj_datasec (abfd)))       \
 662           return FALSE;                                                       \
 663       }
 664 #endif
 665
 666 /* Test if a read-only section can be merged with .text.  This is
 667    possible if:
 668
 669    1. Section has file contents and is read-only.
 670    2. The VMA of the section is after the end of .text and before
 671       the start of .data.
 672    3. The image is demand-pageable (otherwise, a_text in the header
 673       will not reflect the gap between .text and .data).  */
 674
 675 #define aout_section_merge_with_text_p(abfd, sec)                       \
 676   (((sec)->flags & (SEC_HAS_CONTENTS | SEC_READONLY)) ==                \
 677       (SEC_HAS_CONTENTS | SEC_READONLY)                                 \
 678    && obj_textsec (abfd) != NULL                                        \
 679    && obj_datasec (abfd) != NULL                                        \
 680    && (sec)->vma >= (obj_textsec (abfd)->vma +                          \
 681                      obj_textsec (abfd)->size)                          \
 682    && ((sec)->vma + (sec)->size) <= obj_datasec (abfd)->vma             \
 683    && ((abfd)->flags & D_PAGED) != 0)
 684
 685 #endif /* ! defined (LIBAOUT_H) */