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
   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.  Saves cluttering
  33    the source with (bfd_vma) and (bfd_byte *) casts.  */
  34
  35 #define H_PUT_64(abfd, val, where) \
  36   bfd_h_put_64 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
  37
  38 #define H_PUT_32(abfd, val, where) \
  39   bfd_h_put_32 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
  40
  41 #define H_PUT_16(abfd, val, where) \
  42   bfd_h_put_16 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
  43
  44 #define H_PUT_8 bfd_h_put_8
  45
  46 #define H_PUT_S64(abfd, val, where) \
  47   bfd_h_put_signed_64 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
  48
  49 #define H_PUT_S32(abfd, val, where) \
  50   bfd_h_put_signed_32 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
  51
  52 #define H_PUT_S16(abfd, val, where) \
  53   bfd_h_put_signed_16 ((abfd), (bfd_vma) (val), (bfd_byte *) (where))
  54
  55 #define H_PUT_S8 bfd_h_put_signed_8
  56
  57 #define H_GET_64(abfd, where) \
  58   bfd_h_get_64 ((abfd), (bfd_byte *) (where))
  59
  60 #define H_GET_32(abfd, where) \
  61   bfd_h_get_32 ((abfd), (bfd_byte *) (where))
  62
  63 #define H_GET_16(abfd, where) \
  64   bfd_h_get_16 ((abfd), (bfd_byte *) (where))
  65
  66 #define H_GET_8 bfd_h_get_8
  67
  68 #define H_GET_S64(abfd, where) \
  69   bfd_h_get_signed_64 ((abfd), (bfd_byte *) (where))
  70
  71 #define H_GET_S32(abfd, where) \
  72   bfd_h_get_signed_32 ((abfd), (bfd_byte *) (where))
  73
  74 #define H_GET_S16(abfd, where) \
  75   bfd_h_get_signed_16 ((abfd), (bfd_byte *) (where))
  76
  77 #define H_GET_S8 bfd_h_get_signed_8
  78
  79 /* Parameterize the a.out code based on whether it is being built
  80    for a 32-bit architecture or a 64-bit architecture.  */
  81 /* Do not "beautify" the CONCAT* macro args.  Traditional C will not
  82    remove whitespace added here, and thus will fail to concatenate
  83    the tokens.  */
  84 #if ARCH_SIZE==64
  85 #define GET_WORD H_GET_64
  86 #define GET_SWORD H_GET_S64
  87 #define GET_MAGIC H_GET_32
  88 #define PUT_WORD H_PUT_64
  89 #define PUT_MAGIC H_PUT_32
  90 #ifndef NAME
  91 #define NAME(x,y) CONCAT3 (x,_64_,y)
  92 #endif
  93 #define JNAME(x) CONCAT2 (x,_64)
  94 #define BYTES_IN_WORD 8
  95 #else
  96 #if ARCH_SIZE==16
  97 #define GET_WORD H_GET_16
  98 #define GET_SWORD H_GET_S16
  99 #define GET_MAGIC H_GET_16
 100 #define PUT_WORD H_PUT_16
 101 #define PUT_MAGIC H_PUT_16
 102 #ifndef NAME
 103 #define NAME(x,y) CONCAT3 (x,_16_,y)
 104 #endif
 105 #define JNAME(x) CONCAT2 (x,_16)
 106 #define BYTES_IN_WORD 2
 107 #else /* ARCH_SIZE == 32 */
 108 #define GET_WORD H_GET_32
 109 #define GET_SWORD H_GET_S32
 110 #define GET_MAGIC H_GET_32
 111 #define PUT_WORD H_PUT_32
 112 #define PUT_MAGIC H_PUT_32
 113 #ifndef NAME
 114 #define NAME(x,y) CONCAT3 (x,_32_,y)
 115 #endif
 116 #define JNAME(x) CONCAT2 (x,_32)
 117 #define BYTES_IN_WORD 4
 118 #endif /* ARCH_SIZE==32 */
 119 #endif /* ARCH_SIZE==64 */
 120
 121 /* Declare at file level, since used in parameter lists, which have
 122    weird scope.  */
 123 struct external_exec;
 124 struct external_nlist;
 125 struct reloc_ext_external;
 126 struct reloc_std_external;
 127 \f
 128 /* a.out backend linker hash table entries.  */
 129
 130 struct aout_link_hash_entry
 131 {
 132   struct bfd_link_hash_entry root;
 133   /* Whether this symbol has been written out.  */
 134   bfd_boolean written;
 135   /* Symbol index in output file.  */
 136   int indx;
 137 };
 138
 139 /* a.out backend linker hash table.  */
 140
 141 struct aout_link_hash_table
 142 {
 143   struct bfd_link_hash_table root;
 144 };
 145
 146 /* Look up an entry in an a.out link hash table.  */
 147
 148 #define aout_link_hash_lookup(table, string, create, copy, follow) \
 149   ((struct aout_link_hash_entry *) \
 150    bfd_link_hash_lookup (&(table)->root, (string), (create), (copy), (follow)))
 151
 152 /* Traverse an a.out link hash table.  */
 153
 154 #define aout_link_hash_traverse(table, func, info)                      \
 155   (bfd_link_hash_traverse                                               \
 156    (&(table)->root,                                                     \
 157     (bfd_boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
 158     (info)))
 159
 160 /* Get the a.out link hash table from the info structure.  This is
 161    just a cast.  */
 162
 163 #define aout_hash_table(p) ((struct aout_link_hash_table *) ((p)->hash))
 164 \f
 165 /* Back-end information for various a.out targets.  */
 166 struct aout_backend_data
 167 {
 168   /* Are ZMAGIC files mapped contiguously?  If so, the text section may
 169      need more padding, if the segment size (granularity for memory access
 170      control) is larger than the page size.  */
 171   unsigned char zmagic_mapped_contiguous;
 172   /* If this flag is set, ZMAGIC/NMAGIC file headers get mapped in with the
 173      text section, which starts immediately after the file header.
 174      If not, the text section starts on the next page.  */
 175   unsigned char text_includes_header;
 176
 177   /* If this flag is set, then if the entry address is not in the
 178      first SEGMENT_SIZE bytes of the text section, it is taken to be
 179      the address of the start of the text section.  This can be useful
 180      for kernels.  */
 181   unsigned char entry_is_text_address;
 182
 183   /* The value to pass to N_SET_FLAGS.  */
 184   unsigned char exec_hdr_flags;
 185
 186   /* If the text section VMA isn't specified, and we need an absolute
 187      address, use this as the default.  If we're producing a relocatable
 188      file, zero is always used.  */
 189   /* ?? Perhaps a callback would be a better choice?  Will this do anything
 190      reasonable for a format that handles multiple CPUs with different
 191      load addresses for each?  */
 192   bfd_vma default_text_vma;
 193
 194   /* Callback for setting the page and segment sizes, if they can't be
 195      trivially determined from the architecture.  */
 196   bfd_boolean (*set_sizes)
 197     PARAMS ((bfd *));
 198
 199   /* zmagic files only. For go32, the length of the exec header contributes
 200      to the size of the text section in the file for alignment purposes but
 201      does *not* get counted in the length of the text section. */
 202   unsigned char exec_header_not_counted;
 203
 204   /* Callback from the add symbols phase of the linker code to handle
 205      a dynamic object.  */
 206   bfd_boolean (*add_dynamic_symbols)
 207     PARAMS ((bfd *, struct bfd_link_info *, struct external_nlist **,
 208              bfd_size_type *, char **));
 209
 210   /* Callback from the add symbols phase of the linker code to handle
 211      adding a single symbol to the global linker hash table.  */
 212   bfd_boolean (*add_one_symbol)
 213     PARAMS ((struct bfd_link_info *, bfd *, const char *, flagword,
 214              asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean,
 215              struct bfd_link_hash_entry **));
 216
 217   /* Called to handle linking a dynamic object.  */
 218   bfd_boolean (*link_dynamic_object)
 219     PARAMS ((struct bfd_link_info *, bfd *));
 220
 221   /* Called for each global symbol being written out by the linker.
 222      This should write out the dynamic symbol information.  */
 223   bfd_boolean (*write_dynamic_symbol)
 224     PARAMS ((bfd *, struct bfd_link_info *, struct aout_link_hash_entry *));
 225
 226   /* If this callback is not NULL, the linker calls it for each reloc.
 227      RELOC is a pointer to the unswapped reloc.  If *SKIP is set to
 228      TRUE, the reloc will be skipped.  *RELOCATION may be changed to
 229      change the effects of the relocation.  */
 230   bfd_boolean (*check_dynamic_reloc)
 231     PARAMS ((struct bfd_link_info *info, bfd *input_bfd,
 232              asection *input_section, struct aout_link_hash_entry *h,
 233              PTR reloc, bfd_byte *contents, bfd_boolean *skip,
 234              bfd_vma *relocation));
 235
 236   /* Called at the end of a link to finish up any dynamic linking
 237      information.  */
 238   bfd_boolean (*finish_dynamic_link)
 239     PARAMS ((bfd *, struct bfd_link_info *));
 240 };
 241 #define aout_backend_info(abfd) \
 242         ((const struct aout_backend_data *)((abfd)->xvec->backend_data))
 243
 244 /* This is the layout in memory of a "struct exec" while we process it.
 245    All 'lengths' are given as a number of bytes.
 246    All 'alignments' are for relinkable files only;  an alignment of
 247         'n' indicates the corresponding segment must begin at an
 248         address that is a multiple of (2**n).  */
 249
 250 struct internal_exec
 251 {
 252     long a_info;                /* Magic number and flags, packed */
 253     bfd_vma a_text;             /* length of text, in bytes  */
 254     bfd_vma a_data;             /* length of data, in bytes  */
 255     bfd_vma a_bss;              /* length of uninitialized data area in mem */
 256     bfd_vma a_syms;             /* length of symbol table data in file */
 257     bfd_vma a_entry;            /* start address */
 258     bfd_vma a_trsize;           /* length of text's relocation info, in bytes */
 259     bfd_vma a_drsize;           /* length of data's relocation info, in bytes */
 260     /* Added for i960 */
 261     bfd_vma a_tload;            /* Text runtime load address */
 262     bfd_vma a_dload;            /* Data runtime load address */
 263     unsigned char a_talign;     /* Alignment of text segment */
 264     unsigned char a_dalign;     /* Alignment of data segment */
 265     unsigned char a_balign;     /* Alignment of bss segment */
 266     char a_relaxable;           /* Enough info for linker relax */
 267 };
 268
 269 /* Magic number is written
 270 < MSB          >
 271 3130292827262524232221201918171615141312111009080706050403020100
 272 < FLAGS        >< MACHINE TYPE ><  MAGIC NUMBER                >
 273 */
 274 /* Magic number for NetBSD is
 275 <MSB           >
 276 3130292827262524232221201918171615141312111009080706050403020100
 277 < FLAGS    >< MACHINE TYPE     ><  MAGIC NUMBER                >
 278 */
 279
 280 enum machine_type {
 281   M_UNKNOWN = 0,
 282   M_68010 = 1,
 283   M_68020 = 2,
 284   M_SPARC = 3,
 285   /* Skip a bunch so we don't run into any of SUN's numbers.  */
 286   /* Make these up for the ns32k.  */
 287   M_NS32032 = (64),     /* ns32032 running ? */
 288   M_NS32532 = (64 + 5), /* ns32532 running mach */
 289
 290   M_386 = 100,
 291   M_29K = 101,          /* AMD 29000 */
 292   M_386_DYNIX = 102,    /* Sequent running dynix */
 293   M_ARM = 103,          /* Advanced Risc Machines ARM */
 294   M_SPARCLET = 131,     /* SPARClet = M_SPARC + 128 */
 295   M_386_NETBSD = 134,   /* NetBSD/i386 binary */
 296   M_68K_NETBSD = 135,   /* NetBSD/m68k binary */
 297   M_68K4K_NETBSD = 136, /* NetBSD/m68k4k binary */
 298   M_532_NETBSD = 137,   /* NetBSD/ns32k binary */
 299   M_SPARC_NETBSD = 138, /* NetBSD/sparc binary */
 300   M_PMAX_NETBSD = 139,  /* NetBSD/pmax (MIPS little-endian) binary */
 301   M_VAX_NETBSD = 140,   /* NetBSD/vax binary */
 302   M_ALPHA_NETBSD = 141, /* NetBSD/alpha binary */
 303   M_ARM6_NETBSD = 143,  /* NetBSD/arm32 binary */
 304   M_SPARCLET_1 = 147,   /* 0x93, reserved */
 305   M_VAX4K_NETBSD = 150, /* NetBSD/vax 4K pages binary */
 306   M_MIPS1 = 151,        /* MIPS R2000/R3000 binary */
 307   M_MIPS2 = 152,        /* MIPS R4000/R6000 binary */
 308   M_SPARCLET_2 = 163,   /* 0xa3, reserved */
 309   M_SPARCLET_3 = 179,   /* 0xb3, reserved */
 310   M_SPARCLET_4 = 195,   /* 0xc3, reserved */
 311   M_HP200 = 200,        /* HP 200 (68010) BSD binary */
 312   M_HP300 = (300 % 256), /* HP 300 (68020+68881) BSD binary */
 313   M_HPUX = (0x20c % 256), /* HP 200/300 HPUX binary */
 314   M_SPARCLET_5 = 211,   /* 0xd3, reserved */
 315   M_SPARCLET_6 = 227,   /* 0xe3, reserved */
 316   /*  M_SPARCLET_7 = 243        / * 0xf3, reserved */
 317   M_SPARCLITE_LE = 243,
 318   M_CRIS = 255          /* Axis CRIS binary.  */
 319 };
 320
 321 #define N_DYNAMIC(exec) ((exec).a_info & 0x80000000)
 322
 323 #ifndef N_MAGIC
 324 # define N_MAGIC(exec) ((exec).a_info & 0xffff)
 325 #endif
 326
 327 #ifndef N_MACHTYPE
 328 # define N_MACHTYPE(exec) ((enum machine_type)(((exec).a_info >> 16) & 0xff))
 329 #endif
 330
 331 #ifndef N_FLAGS
 332 # define N_FLAGS(exec) (((exec).a_info >> 24) & 0xff)
 333 #endif
 334
 335 #ifndef N_SET_INFO
 336 # define N_SET_INFO(exec, magic, type, flags) \
 337 ((exec).a_info = ((magic) & 0xffff) \
 338  | (((int)(type) & 0xff) << 16) \
 339  | (((flags) & 0xff) << 24))
 340 #endif
 341
 342 #ifndef N_SET_DYNAMIC
 343 # define N_SET_DYNAMIC(exec, dynamic) \
 344 ((exec).a_info = (dynamic) ? (long) ((exec).a_info | 0x80000000) : \
 345 ((exec).a_info & 0x7fffffff))
 346 #endif
 347
 348 #ifndef N_SET_MAGIC
 349 # define N_SET_MAGIC(exec, magic) \
 350 ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
 351 #endif
 352
 353 #ifndef N_SET_MACHTYPE
 354 # define N_SET_MACHTYPE(exec, machtype) \
 355 ((exec).a_info = \
 356  ((exec).a_info&0xff00ffff) | ((((int)(machtype))&0xff) << 16))
 357 #endif
 358
 359 #ifndef N_SET_FLAGS
 360 # define N_SET_FLAGS(exec, flags) \
 361 ((exec).a_info = \
 362  ((exec).a_info&0x00ffffff) | (((flags) & 0xff) << 24))
 363 #endif
 364
 365 typedef struct aout_symbol {
 366   asymbol symbol;
 367   short desc;
 368   char other;
 369   unsigned char type;
 370 } aout_symbol_type;
 371
 372 /* The `tdata' struct for all a.out-like object file formats.
 373    Various things depend on this struct being around any time an a.out
 374    file is being handled.  An example is dbxread.c in GDB.  */
 375
 376 struct aoutdata {
 377   struct internal_exec *hdr;            /* exec file header */
 378   aout_symbol_type *symbols;            /* symtab for input bfd */
 379
 380   /* For ease, we do this.  */
 381   asection *textsec;
 382   asection *datasec;
 383   asection *bsssec;
 384
 385   /* We remember these offsets so that after check_file_format, we have
 386      no dependencies on the particular format of the exec_hdr.  */
 387   file_ptr sym_filepos;
 388   file_ptr str_filepos;
 389
 390   /* Size of a relocation entry in external form.  */
 391   unsigned reloc_entry_size;
 392
 393   /* Size of a symbol table entry in external form.  */
 394   unsigned symbol_entry_size;
 395
 396   /* Page size - needed for alignment of demand paged files.  */
 397   unsigned long page_size;
 398
 399   /* Segment size - needed for alignment of demand paged files.  */
 400   unsigned long segment_size;
 401
 402   /* Zmagic disk block size - need to align the start of the text
 403      section in ZMAGIC binaries.  Normally the same as page_size.  */
 404   unsigned long zmagic_disk_block_size;
 405
 406   unsigned exec_bytes_size;
 407   unsigned vma_adjusted : 1;
 408
 409   /* Used when a bfd supports several highly similar formats.  */
 410   enum
 411     {
 412       default_format = 0,
 413       /* Used on HP 9000/300 running HP/UX.  See hp300hpux.c.  */
 414       gnu_encap_format,
 415       /* Used on Linux, 386BSD, etc.  See include/aout/aout64.h.  */
 416       q_magic_format
 417     } subformat;
 418
 419   enum
 420     {
 421       undecided_magic = 0,
 422       z_magic,
 423       o_magic,
 424       n_magic
 425     } magic;
 426
 427   /* A buffer for find_nearest_line.  */
 428   char *line_buf;
 429
 430   /* The external symbol information.  */
 431   struct external_nlist *external_syms;
 432   bfd_size_type external_sym_count;
 433   bfd_window sym_window;
 434   char *external_strings;
 435   bfd_size_type external_string_size;
 436   bfd_window string_window;
 437   struct aout_link_hash_entry **sym_hashes;
 438
 439   /* A pointer for shared library information.  */
 440   PTR dynamic_info;
 441
 442   /* A mapping from local symbols to offsets into the global offset
 443      table, used when linking on SunOS.  This is indexed by the symbol
 444      index.  */
 445   bfd_vma *local_got_offsets;
 446 };
 447
 448 struct  aout_data_struct {
 449     struct aoutdata a;
 450     struct internal_exec e;
 451 };
 452
 453 #define adata(bfd)              ((bfd)->tdata.aout_data->a)
 454 #define exec_hdr(bfd)           (adata(bfd).hdr)
 455 #define obj_aout_symbols(bfd)   (adata(bfd).symbols)
 456 #define obj_textsec(bfd)        (adata(bfd).textsec)
 457 #define obj_datasec(bfd)        (adata(bfd).datasec)
 458 #define obj_bsssec(bfd)         (adata(bfd).bsssec)
 459 #define obj_sym_filepos(bfd)    (adata(bfd).sym_filepos)
 460 #define obj_str_filepos(bfd)    (adata(bfd).str_filepos)
 461 #define obj_reloc_entry_size(bfd) (adata(bfd).reloc_entry_size)
 462 #define obj_symbol_entry_size(bfd) (adata(bfd).symbol_entry_size)
 463 #define obj_aout_subformat(bfd) (adata(bfd).subformat)
 464 #define obj_aout_external_syms(bfd) (adata(bfd).external_syms)
 465 #define obj_aout_external_sym_count(bfd) (adata(bfd).external_sym_count)
 466 #define obj_aout_sym_window(bfd) (adata(bfd).sym_window)
 467 #define obj_aout_external_strings(bfd) (adata(bfd).external_strings)
 468 #define obj_aout_external_string_size(bfd) (adata(bfd).external_string_size)
 469 #define obj_aout_string_window(bfd) (adata(bfd).string_window)
 470 #define obj_aout_sym_hashes(bfd) (adata(bfd).sym_hashes)
 471 #define obj_aout_dynamic_info(bfd) (adata(bfd).dynamic_info)
 472
 473 /* We take the address of the first element of an asymbol to ensure that the
 474    macro is only ever applied to an asymbol.  */
 475 #define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd))
 476
 477 /* Information we keep for each a.out section.  This is currently only
 478    used by the a.out backend linker.  */
 479
 480 struct aout_section_data_struct
 481 {
 482   /* The unswapped relocation entries for this section.  */
 483   PTR relocs;
 484 };
 485
 486 #define aout_section_data(s) \
 487   ((struct aout_section_data_struct *) (s)->used_by_bfd)
 488
 489 #define set_aout_section_data(s,v) \
 490   ((s)->used_by_bfd = (PTR)&(v)->relocs)
 491
 492 /* Prototype declarations for functions defined in aoutx.h.  */
 493
 494 extern bfd_boolean NAME(aout,squirt_out_relocs)
 495   PARAMS ((bfd *, asection *));
 496
 497 extern bfd_boolean NAME(aout,make_sections)
 498   PARAMS ((bfd *));
 499
 500 extern const bfd_target * NAME(aout,some_aout_object_p)
 501   PARAMS ((bfd *, struct internal_exec *, const bfd_target *(*) (bfd *)));
 502
 503 extern bfd_boolean NAME(aout,mkobject)
 504   PARAMS ((bfd *));
 505
 506 extern enum machine_type NAME(aout,machine_type)
 507   PARAMS ((enum bfd_architecture, unsigned long, bfd_boolean *));
 508
 509 extern bfd_boolean NAME(aout,set_arch_mach)
 510   PARAMS ((bfd *, enum bfd_architecture, unsigned long));
 511
 512 extern bfd_boolean NAME(aout,new_section_hook)
 513   PARAMS ((bfd *, asection *));
 514
 515 extern bfd_boolean NAME(aout,set_section_contents)
 516   PARAMS ((bfd *, sec_ptr, const PTR, file_ptr, bfd_size_type));
 517
 518 extern asymbol * NAME(aout,make_empty_symbol)
 519   PARAMS ((bfd *));
 520
 521 extern bfd_boolean NAME(aout,translate_symbol_table)
 522   PARAMS ((bfd *, aout_symbol_type *, struct external_nlist *, bfd_size_type,
 523            char *, bfd_size_type, bfd_boolean));
 524
 525 extern bfd_boolean NAME(aout,slurp_symbol_table)
 526   PARAMS ((bfd *));
 527
 528 extern bfd_boolean NAME(aout,write_syms)
 529   PARAMS ((bfd *));
 530
 531 extern void NAME(aout,reclaim_symbol_table)
 532   PARAMS ((bfd *));
 533
 534 extern long NAME(aout,get_symtab_upper_bound)
 535   PARAMS ((bfd *));
 536
 537 extern long NAME(aout,canonicalize_symtab)
 538   PARAMS ((bfd *, asymbol **));
 539
 540 extern void NAME(aout,swap_ext_reloc_in)
 541   PARAMS ((bfd *, struct reloc_ext_external *, arelent *, asymbol **,
 542            bfd_size_type));
 543 extern void NAME(aout,swap_std_reloc_in)
 544   PARAMS ((bfd *, struct reloc_std_external *, arelent *, asymbol **,
 545            bfd_size_type));
 546
 547 extern reloc_howto_type * NAME(aout,reloc_type_lookup)
 548   PARAMS ((bfd *, bfd_reloc_code_real_type));
 549
 550 extern bfd_boolean NAME(aout,slurp_reloc_table)
 551   PARAMS ((bfd *, sec_ptr, asymbol **));
 552
 553 extern long NAME(aout,canonicalize_reloc)
 554   PARAMS ((bfd *, sec_ptr, arelent **, asymbol **));
 555
 556 extern long NAME(aout,get_reloc_upper_bound)
 557   PARAMS ((bfd *, sec_ptr));
 558
 559 extern void NAME(aout,reclaim_reloc)
 560   PARAMS ((bfd *, sec_ptr));
 561
 562 extern alent * NAME(aout,get_lineno)
 563   PARAMS ((bfd *, asymbol *));
 564
 565 extern void NAME(aout,print_symbol)
 566   PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type));
 567
 568 extern void NAME(aout,get_symbol_info)
 569   PARAMS ((bfd *, asymbol *, symbol_info *));
 570
 571 extern bfd_boolean NAME(aout,find_nearest_line)
 572   PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
 573            const char **, unsigned int *));
 574
 575 extern long NAME(aout,read_minisymbols)
 576   PARAMS ((bfd *, bfd_boolean, PTR *, unsigned int *));
 577
 578 extern asymbol * NAME(aout,minisymbol_to_symbol)
 579   PARAMS ((bfd *, bfd_boolean, const PTR, asymbol *));
 580
 581 extern int NAME(aout,sizeof_headers)
 582   PARAMS ((bfd *, bfd_boolean));
 583
 584 extern bfd_boolean NAME(aout,adjust_sizes_and_vmas)
 585   PARAMS ((bfd *, bfd_size_type *, file_ptr *));
 586
 587 extern void NAME(aout,swap_exec_header_in)
 588   PARAMS ((bfd *, struct external_exec *, struct internal_exec *));
 589
 590 extern void NAME(aout,swap_exec_header_out)
 591   PARAMS ((bfd *, struct internal_exec *, struct external_exec *));
 592
 593 extern struct bfd_hash_entry * NAME(aout,link_hash_newfunc)
 594   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
 595
 596 extern bfd_boolean NAME(aout,link_hash_table_init)
 597   PARAMS ((struct aout_link_hash_table *, bfd *,
 598            struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 599                                        struct bfd_hash_table *,
 600                                        const char *)));
 601
 602 extern struct bfd_link_hash_table * NAME(aout,link_hash_table_create)
 603   PARAMS ((bfd *));
 604
 605 extern bfd_boolean NAME(aout,link_add_symbols)
 606   PARAMS ((bfd *, struct bfd_link_info *));
 607
 608 extern bfd_boolean NAME(aout,final_link)
 609   PARAMS ((bfd *, struct bfd_link_info *,
 610            void (*) (bfd *, file_ptr *, file_ptr *, file_ptr *)));
 611
 612 extern bfd_boolean NAME(aout,bfd_free_cached_info)
 613   PARAMS ((bfd *));
 614
 615 /* A.out uses the generic versions of these routines...  */
 616
 617 #define aout_16_get_section_contents    _bfd_generic_get_section_contents
 618
 619 #define aout_32_get_section_contents    _bfd_generic_get_section_contents
 620
 621 #define aout_64_get_section_contents    _bfd_generic_get_section_contents
 622 #ifndef NO_WRITE_HEADER_KLUDGE
 623 #define NO_WRITE_HEADER_KLUDGE 0
 624 #endif
 625
 626 #ifndef aout_32_bfd_is_local_label_name
 627 #define aout_32_bfd_is_local_label_name bfd_generic_is_local_label_name
 628 #endif
 629
 630 #ifndef WRITE_HEADERS
 631 #define WRITE_HEADERS(abfd, execp)                                            \
 632       {                                                                       \
 633         bfd_size_type text_size; /* dummy vars */                             \
 634         file_ptr text_end;                                                    \
 635         if (adata(abfd).magic == undecided_magic)                             \
 636           NAME(aout,adjust_sizes_and_vmas) (abfd, &text_size, &text_end);     \
 637                                                                               \
 638         execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE;        \
 639         execp->a_entry = bfd_get_start_address (abfd);                        \
 640                                                                               \
 641         execp->a_trsize = ((obj_textsec (abfd)->reloc_count) *                \
 642                            obj_reloc_entry_size (abfd));                      \
 643         execp->a_drsize = ((obj_datasec (abfd)->reloc_count) *                \
 644                            obj_reloc_entry_size (abfd));                      \
 645         NAME(aout,swap_exec_header_out) (abfd, execp, &exec_bytes);           \
 646                                                                               \
 647         if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0                      \
 648             || bfd_bwrite ((PTR) &exec_bytes, (bfd_size_type) EXEC_BYTES_SIZE, \
 649                           abfd) != EXEC_BYTES_SIZE)                           \
 650           return FALSE;                                                       \
 651         /* Now write out reloc info, followed by syms and strings.  */        \
 652                                                                               \
 653         if (bfd_get_outsymbols (abfd) != (asymbol **) NULL                    \
 654             && bfd_get_symcount (abfd) != 0)                                  \
 655           {                                                                   \
 656             if (bfd_seek (abfd, (file_ptr) (N_SYMOFF(*execp)), SEEK_SET) != 0)\
 657               return FALSE;                                                   \
 658                                                                               \
 659             if (! NAME(aout,write_syms) (abfd))                               \
 660               return FALSE;                                                   \
 661           }                                                                   \
 662                                                                               \
 663         if (bfd_seek (abfd, (file_ptr) (N_TRELOFF(*execp)), SEEK_SET) != 0)   \
 664           return FALSE;                                                       \
 665         if (!NAME(aout,squirt_out_relocs) (abfd, obj_textsec (abfd)))         \
 666           return FALSE;                                                       \
 667                                                                               \
 668         if (bfd_seek (abfd, (file_ptr) (N_DRELOFF(*execp)), SEEK_SET) != 0)   \
 669           return FALSE;                                                       \
 670         if (!NAME(aout,squirt_out_relocs) (abfd, obj_datasec (abfd)))         \
 671           return FALSE;                                                       \
 672       }
 673 #endif
 674
 675 /* Test if a read-only section can be merged with .text.  This is
 676    possible if:
 677
 678    1. Section has file contents and is read-only.
 679    2. The VMA of the section is after the end of .text and before
 680       the start of .data.
 681    3. The image is demand-pageable (otherwise, a_text in the header
 682       will not reflect the gap between .text and .data).  */
 683
 684 #define aout_section_merge_with_text_p(abfd, sec)                       \
 685   (((sec)->flags & (SEC_HAS_CONTENTS | SEC_READONLY)) ==                \
 686       (SEC_HAS_CONTENTS | SEC_READONLY)                                 \
 687    && obj_textsec (abfd) != NULL                                        \
 688    && obj_datasec (abfd) != NULL                                        \
 689    && (sec)->vma >= (obj_textsec (abfd)->vma +                          \
 690                      obj_textsec (abfd)->_cooked_size)                  \
 691    && ((sec)->vma + (sec)->_cooked_size) <= obj_datasec (abfd)->vma     \
 692    && ((abfd)->flags & D_PAGED) != 0)
 693
 694 #endif /* ! defined (LIBAOUT_H) */