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      1 /* BFD back-end data structures for a.out (and similar) files.
      2    Copyright (C) 1990-2014 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 
     99 /* 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 
    137 /* 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 *, asymbol **, asection *, bfd_vma,
    557    const char **, const char **, unsigned int *, 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) */
    692