path: root/bfd/libaout.h

/* BFD back-end data structures for a.out (and similar) files.
   Copyright (C) 1990-2023 Free Software Foundation, Inc.
   Written by Cygnus Support.

   This file is part of BFD, the Binary File Descriptor library.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#ifndef LIBAOUT_H
#define LIBAOUT_H

/* We try to encapsulate the differences in the various a.out file
   variants in a few routines, and otherwise share large masses of code.
   This means we only have to fix bugs in one place, most of the time.  */

#include "bfdlink.h"

/* Macros for accessing components in an aout header.  */

#define H_PUT_64  bfd_h_put_64
#define H_PUT_32  bfd_h_put_32
#define H_PUT_16  bfd_h_put_16
#define H_PUT_8   bfd_h_put_8
#define H_PUT_S64 bfd_h_put_signed_64
#define H_PUT_S32 bfd_h_put_signed_32
#define H_PUT_S16 bfd_h_put_signed_16
#define H_PUT_S8  bfd_h_put_signed_8
#define H_GET_64  bfd_h_get_64
#define H_GET_32  bfd_h_get_32
#define H_GET_16  bfd_h_get_16
#define H_GET_8   bfd_h_get_8
#define H_GET_S64 bfd_h_get_signed_64
#define H_GET_S32 bfd_h_get_signed_32
#define H_GET_S16 bfd_h_get_signed_16
#define H_GET_S8  bfd_h_get_signed_8

/* Parameterize the a.out code based on whether it is being built
   for a 32-bit architecture or a 64-bit architecture.  */
/* Do not "beautify" the CONCAT* macro args.  Traditional C will not
   remove whitespace added here, and thus will fail to concatenate
   the tokens.  */
#if ARCH_SIZE==64
#define GET_WORD  H_GET_64
#define GET_SWORD H_GET_S64
#define GET_MAGIC H_GET_32
#define PUT_WORD  H_PUT_64
#define PUT_MAGIC H_PUT_32
#ifndef NAME
#define NAME(x,y) CONCAT3 (x,_64_,y)
#endif
#define JNAME(x) CONCAT2 (x,_64)
#define BYTES_IN_WORD 8
#else
#if ARCH_SIZE==16
#define GET_WORD  H_GET_16
#define GET_SWORD H_GET_S16
#define GET_MAGIC H_GET_16
#define PUT_WORD  H_PUT_16
#define PUT_MAGIC H_PUT_16
#ifndef NAME
#define NAME(x,y) CONCAT3 (x,_16_,y)
#endif
#define JNAME(x) CONCAT2 (x,_16)
#define BYTES_IN_WORD 2
#else /* ARCH_SIZE == 32 */
#define GET_WORD  H_GET_32
#define GET_SWORD H_GET_S32
#define GET_MAGIC H_GET_32
#define PUT_WORD  H_PUT_32
#define PUT_MAGIC H_PUT_32
#ifndef NAME
#define NAME(x,y) CONCAT3 (x,_32_,y)
#endif
#define JNAME(x) CONCAT2 (x,_32)
#define BYTES_IN_WORD 4
#endif /* ARCH_SIZE==32 */
#endif /* ARCH_SIZE==64 */

/* Declare at file level, since used in parameter lists, which have
   weird scope.  */
struct external_exec;
struct external_nlist;
struct reloc_ext_external;
struct reloc_std_external;

/* a.out backend linker hash table entries.  */

struct aout_link_hash_entry
{
  struct bfd_link_hash_entry root;
  /* Whether this symbol has been written out.  */
  bool written;
  /* Symbol index in output file.  */
  int indx;
};

/* a.out backend linker hash table.  */

struct aout_link_hash_table
{
  struct bfd_link_hash_table root;
};

/* Look up an entry in an a.out link hash table.  */

#define aout_link_hash_lookup(table, string, create, copy, follow) \
  ((struct aout_link_hash_entry *) \
   bfd_link_hash_lookup (&(table)->root, (string), (create), (copy), (follow)))

/* Traverse an a.out link hash table.  */

#define aout_link_hash_traverse(table, func, info)			\
  (bfd_link_hash_traverse						\
   (&(table)->root,							\
    (bool (*) (struct bfd_link_hash_entry *, void *)) (func),	\
    (info)))

/* Get the a.out link hash table from the info structure.  This is
   just a cast.  */

#define aout_hash_table(p) ((struct aout_link_hash_table *) ((p)->hash))

/* Back-end information for various a.out targets.  */
struct aout_backend_data
{
  /* Are ZMAGIC files mapped contiguously?  If so, the text section may
     need more padding, if the segment size (granularity for memory access
     control) is larger than the page size.  */
  unsigned char zmagic_mapped_contiguous;
  /* If this flag is set, ZMAGIC/NMAGIC file headers get mapped in with the
     text section, which starts immediately after the file header.
     If not, the text section starts on the next page.  */
  unsigned char text_includes_header;

  /* If this flag is set, then if the entry address is not in the
     first SEGMENT_SIZE bytes of the text section, it is taken to be
     the address of the start of the text section.  This can be useful
     for kernels.  */
  unsigned char entry_is_text_address;

  /* The value to pass to N_SET_FLAGS.  */
  unsigned char exec_hdr_flags;

  /* If the text section VMA isn't specified, and we need an absolute
     address, use this as the default.  If we're producing a relocatable
     file, zero is always used.  */
  /* ?? Perhaps a callback would be a better choice?  Will this do anything
     reasonable for a format that handles multiple CPUs with different
     load addresses for each?  */
  bfd_vma default_text_vma;

  /* Callback for setting the page and segment sizes, if they can't be
     trivially determined from the architecture.  */
  bool (*set_sizes) (bfd *);

  /* zmagic files only. For go32, the length of the exec header contributes
     to the size of the text section in the file for alignment purposes but
     does *not* get counted in the length of the text section. */
  unsigned char exec_header_not_counted;

  /* Callback from the add symbols phase of the linker code to handle
     a dynamic object.  */
  bool (*add_dynamic_symbols)
    (bfd *, struct bfd_link_info *, struct external_nlist **,
     bfd_size_type *, char **);

  /* Callback from the add symbols phase of the linker code to handle
     adding a single symbol to the global linker hash table.  */
  bool (*add_one_symbol)
    (struct bfd_link_info *, bfd *, const char *, flagword,
     asection *, bfd_vma, const char *, bool, bool,
     struct bfd_link_hash_entry **);

  /* Called to handle linking a dynamic object.  */
  bool (*link_dynamic_object)
    (struct bfd_link_info *, bfd *);

  /* Called for each global symbol being written out by the linker.
     This should write out the dynamic symbol information.  */
  bool (*write_dynamic_symbol)
    (bfd *, struct bfd_link_info *, struct aout_link_hash_entry *);

  /* If this callback is not NULL, the linker calls it for each reloc.
     RELOC is a pointer to the unswapped reloc.  If *SKIP is set to
     TRUE, the reloc will be skipped.  *RELOCATION may be changed to
     change the effects of the relocation.  */
  bool (*check_dynamic_reloc)
    (struct bfd_link_info *info, bfd *input_bfd,
     asection *input_section, struct aout_link_hash_entry *h,
     void * reloc, bfd_byte *contents, bool *skip,
     bfd_vma *relocation);

  /* Called at the end of a link to finish up any dynamic linking
     information.  */
  bool (*finish_dynamic_link) (bfd *, struct bfd_link_info *);
};
#define aout_backend_info(abfd) \
	((const struct aout_backend_data *)((abfd)->xvec->backend_data))

/* This is the layout in memory of a "struct exec" while we process it.
   All 'lengths' are given as a number of bytes.
   All 'alignments' are for relinkable files only;  an alignment of
	'n' indicates the corresponding segment must begin at an
	address that is a multiple of (2**n).  */

struct internal_exec
{
  long a_info;			/* Magic number and flags, packed.  */
  bfd_vma a_text;		/* Length of text, in bytes.  */
  bfd_vma a_data;		/* Length of data, in bytes.  */
  bfd_vma a_bss;		/* Length of uninitialized data area in mem.  */
  bfd_vma a_syms;		/* Length of symbol table data in file.  */
  bfd_vma a_entry;		/* Start address.  */
  bfd_vma a_trsize;		/* Length of text's relocation info, in bytes.  */
  bfd_vma a_drsize;		/* Length of data's relocation info, in bytes.  */
  /* Added for i960 */
  bfd_vma a_tload;		/* Text runtime load address.  */
  bfd_vma a_dload;		/* Data runtime load address.  */
  unsigned char a_talign;	/* Alignment of text segment.  */
  unsigned char a_dalign;	/* Alignment of data segment.  */
  unsigned char a_balign;	/* Alignment of bss segment.  */
  char a_relaxable;		/* Enough info for linker relax.  */
};

/* Magic number is written
   < MSB	  >
   3130292827262524232221201918171615141312111009080706050403020100
   < FLAGS	  >< MACHINE TYPE ><  MAGIC NUMBER		  >  */

/* Magic number for NetBSD is
   <MSB		  >
   3130292827262524232221201918171615141312111009080706050403020100
   < FLAGS    >< MACHINE TYPE	  ><  MAGIC NUMBER		  >  */

enum machine_type
{
  M_UNKNOWN = 0,
  M_68010 = 1,
  M_68020 = 2,
  M_SPARC = 3,
  /* Skip a bunch so we don't run into any of SUN's numbers.  */
  /* Make these up for the ns32k.  */
  M_NS32032 = (64),	  /* NS32032 running ?  */
  M_NS32532 = (64 + 5),	  /* NS32532 running mach.  */
  M_386 = 100,
  M_29K = 101,		  /* AMD 29000.  */
  M_386_DYNIX = 102,	  /* Sequent running dynix.  */
  M_ARM = 103,		  /* Advanced Risc Machines ARM.  */
  M_SPARCLET = 131,	  /* SPARClet = M_SPARC + 128.  */
  M_386_NETBSD = 134,	  /* NetBSD/i386 binary.  */
  M_68K_NETBSD = 135,	  /* NetBSD/m68k binary.  */
  M_68K4K_NETBSD = 136,	  /* NetBSD/m68k4k binary.  */
  M_532_NETBSD = 137,	  /* NetBSD/ns32k binary.  */
  M_SPARC_NETBSD = 138,	  /* NetBSD/sparc binary.  */
  M_PMAX_NETBSD = 139,	  /* NetBSD/pmax (MIPS little-endian) binary.  */
  M_VAX_NETBSD = 140,	  /* NetBSD/vax binary.  */
  M_ALPHA_NETBSD = 141,	  /* NetBSD/alpha binary.  */
  M_ARM6_NETBSD = 143,	  /* NetBSD/arm32 binary.  */
  M_SPARCLET_1 = 147,	  /* 0x93, reserved.  */
  M_POWERPC_NETBSD = 149, /* NetBSD/powerpc (big-endian) binary.  */
  M_VAX4K_NETBSD = 150,	  /* NetBSD/vax 4K pages binary.  */
  M_MIPS1 = 151,	  /* MIPS R2000/R3000 binary.  */
  M_MIPS2 = 152,	  /* MIPS R4000/R6000 binary.  */
  M_88K_OPENBSD = 153,	  /* OpenBSD/m88k binary.  */
  M_HPPA_OPENBSD = 154,	  /* OpenBSD/hppa binary.  */
  M_SPARC64_NETBSD = 156, /* NetBSD/sparc64 binary.  */
  M_X86_64_NETBSD = 157,  /* NetBSD/amd64 binary.  */
  M_SPARCLET_2 = 163,	  /* 0xa3, reserved.  */
  M_SPARCLET_3 = 179,	  /* 0xb3, reserved.  */
  M_SPARCLET_4 = 195,	  /* 0xc3, reserved.  */
  M_HP200 = 200,	  /* HP 200 (68010) BSD binary.  */
  M_HP300 = (300 % 256),  /* HP 300 (68020+68881) BSD binary.  */
  M_HPUX = (0x20c % 256), /* HP 200/300 HPUX binary.  */
  M_SPARCLET_5 = 211,	  /* 0xd3, reserved.  */
  M_SPARCLET_6 = 227,	  /* 0xe3, reserved.  */
/*M_SPARCLET_7 = 243	 / * 0xf3, reserved.  */
  M_SPARCLITE_LE = 243,
  M_CRIS = 255		  /* Axis CRIS binary.  */
};

#define N_DYNAMIC(execp) ((execp)->a_info & 0x80000000)

#ifndef N_MAGIC
# define N_MAGIC(execp) ((execp)->a_info & 0xffff)
#endif

#ifndef N_MACHTYPE
# define N_MACHTYPE(execp) ((enum machine_type)(((execp)->a_info >> 16) & 0xff))
#endif

#ifndef N_FLAGS
# define N_FLAGS(execp) (((execp)->a_info >> 24) & 0xff)
#endif

#ifndef N_SET_INFO
# define N_SET_INFO(execp, magic, type, flags) \
((execp)->a_info = ((magic) & 0xffff) \
 | (((int)(type) & 0xff) << 16) \
 | (((flags) & 0xffu) << 24))
#endif

#ifndef N_SET_DYNAMIC
# define N_SET_DYNAMIC(execp, dynamic) \
((execp)->a_info = (dynamic) ? (long) ((execp)->a_info | 0x80000000) : \
((execp)->a_info & 0x7fffffff))
#endif

#ifndef N_SET_MAGIC
# define N_SET_MAGIC(execp, magic) \
((execp)->a_info = (((execp)->a_info & 0xffff0000) | ((magic) & 0xffff)))
#endif

#ifndef N_SET_MACHTYPE
# define N_SET_MACHTYPE(execp, machtype) \
((execp)->a_info = \
 ((execp)->a_info & 0xff00ffff) | ((((int) (machtype)) &0xff) << 16))
#endif

#ifndef N_SET_FLAGS
# define N_SET_FLAGS(execp, flags) \
((execp)->a_info = \
 ((execp)->a_info & 0x00ffffff) | (((flags) & 0xffu) << 24))
#endif

typedef struct aout_symbol
{
  asymbol symbol;
  short desc;
  char other;
  unsigned char type;
} aout_symbol_type;

/* The `tdata' struct for all a.out-like object file formats.
   Various things depend on this struct being around any time an a.out
   file is being handled.  An example is dbxread.c in GDB.  */

enum aout_subformat {
  default_format = 0,
  /* Used on HP 9000/300 running HP/UX.  */
  gnu_encap_format,
  /* Used on Linux, 386BSD, etc.  See include/aout/aout64.h.  */
  q_magic_format
};

enum aout_magic {
  undecided_magic = 0,
  z_magic,
  o_magic,
  n_magic,
  i_magic
};

struct aoutdata
{
  struct internal_exec *hdr;		/* Exec file header.  */
  aout_symbol_type *symbols;		/* Symtab for input bfd.  */

  /* For ease, we do this.  */
  asection *textsec;
  asection *datasec;
  asection *bsssec;

  /* We remember these offsets so that after check_file_format, we have
     no dependencies on the particular format of the exec_hdr.  */
  file_ptr sym_filepos;
  file_ptr str_filepos;

  /* Size of a relocation entry in external form.  */
  unsigned reloc_entry_size;

  /* Size of a symbol table entry in external form.  */
  unsigned symbol_entry_size;

  /* Page size - needed for alignment of demand paged files.  */
  unsigned long page_size;

  /* Segment size - needed for alignment of demand paged files.  */
  unsigned long segment_size;

  /* Zmagic disk block size - need to align the start of the text
     section in ZMAGIC binaries.  Normally the same as page_size.  */
  unsigned long zmagic_disk_block_size;

  unsigned exec_bytes_size;
  unsigned vma_adjusted : 1;

  /* Used when a bfd supports several highly similar formats.  */
  enum aout_subformat subformat;

  enum aout_magic magic;

  /* A buffer for find_nearest_line.  */
  char *line_buf;

  /* The external symbol information.  */
  struct external_nlist *external_syms;
  bfd_size_type external_sym_count;
  bfd_window sym_window;
  char *external_strings;
  bfd_size_type external_string_size;
  bfd_window string_window;
  struct aout_link_hash_entry **sym_hashes;

  /* A pointer for shared library information.  */
  void * dynamic_info;

  /* A mapping from local symbols to offsets into the global offset
     table, used when linking on SunOS.  This is indexed by the symbol
     index.  */
  bfd_vma *local_got_offsets;
};

struct  aout_data_struct
{
  struct aoutdata a;
  struct internal_exec e;
};

#define	adata(bfd)			   ((bfd)->tdata.aout_data->a)
#define	exec_hdr(bfd)			   (adata (bfd).hdr)
#define	obj_aout_symbols(bfd)		   (adata (bfd).symbols)
#define	obj_textsec(bfd)		   (adata (bfd).textsec)
#define	obj_datasec(bfd)		   (adata (bfd).datasec)
#define	obj_bsssec(bfd)			   (adata (bfd).bsssec)
#define	obj_sym_filepos(bfd)		   (adata (bfd).sym_filepos)
#define	obj_str_filepos(bfd)		   (adata (bfd).str_filepos)
#define	obj_reloc_entry_size(bfd)	   (adata (bfd).reloc_entry_size)
#define	obj_symbol_entry_size(bfd)	   (adata (bfd).symbol_entry_size)
#define obj_aout_subformat(bfd)		   (adata (bfd).subformat)
#define obj_aout_external_syms(bfd)	   (adata (bfd).external_syms)
#define obj_aout_external_sym_count(bfd)   (adata (bfd).external_sym_count)
#define obj_aout_sym_window(bfd)	   (adata (bfd).sym_window)
#define obj_aout_external_strings(bfd)	   (adata (bfd).external_strings)
#define obj_aout_external_string_size(bfd) (adata (bfd).external_string_size)
#define obj_aout_string_window(bfd)	   (adata (bfd).string_window)
#define obj_aout_sym_hashes(bfd)	   (adata (bfd).sym_hashes)
#define obj_aout_dynamic_info(bfd)	   (adata (bfd).dynamic_info)

/* We take the address of the first element of an asymbol to ensure that the
   macro is only ever applied to an asymbol.  */
#define aout_symbol(asymbol) ((aout_symbol_type *)(&(asymbol)->the_bfd))

/* Information we keep for each a.out section.  This is currently only
   used by the a.out backend linker.  */

struct aout_section_data_struct
{
  /* The unswapped relocation entries for this section.  */
  void * relocs;
};

#define aout_section_data(s) \
  ((struct aout_section_data_struct *) (s)->used_by_bfd)

#define set_aout_section_data(s,v) \
  ((s)->used_by_bfd = (void *)&(v)->relocs)

/* Prototype declarations for functions defined in aoutx.h.  */

extern bool NAME (aout, squirt_out_relocs)
  (bfd *, asection *);

extern bool NAME (aout, make_sections)
  (bfd *);

extern bfd_cleanup NAME (aout, some_aout_object_p)
  (bfd *, struct internal_exec *, bfd_cleanup (*) (bfd *));

extern bool NAME (aout, mkobject)
  (bfd *);

extern enum machine_type NAME (aout, machine_type)
  (enum bfd_architecture, unsigned long, bool *);

extern bool NAME (aout, set_arch_mach)
  (bfd *, enum bfd_architecture, unsigned long);

extern bool NAME (aout, new_section_hook)
  (bfd *, asection *);

extern bool NAME (aout, set_section_contents)
  (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);

extern asymbol * NAME (aout, make_empty_symbol)
  (bfd *);

extern bool NAME (aout, translate_symbol_table)
  (bfd *, aout_symbol_type *, struct external_nlist *, bfd_size_type,
   char *, bfd_size_type, bool);

extern bool NAME (aout, slurp_symbol_table)
  (bfd *);

extern bool NAME (aout, write_syms)
  (bfd *);

extern void NAME (aout, reclaim_symbol_table)
  (bfd *);

extern long NAME (aout, get_symtab_upper_bound)
  (bfd *);

extern long NAME (aout, canonicalize_symtab)
  (bfd *, asymbol **);

extern void NAME (aout, swap_ext_reloc_in)
  (bfd *, struct reloc_ext_external *, arelent *, asymbol **,
   bfd_size_type);

extern void NAME (aout, swap_std_reloc_in)
  (bfd *, struct reloc_std_external *, arelent *, asymbol **,
   bfd_size_type);

extern reloc_howto_type * NAME (aout, reloc_type_lookup)
  (bfd *, bfd_reloc_code_real_type);

extern reloc_howto_type * NAME (aout, reloc_name_lookup)
  (bfd *, const char *);

extern bool NAME (aout, slurp_reloc_table)
  (bfd *, sec_ptr, asymbol **);

extern long NAME (aout, canonicalize_reloc)
  (bfd *, sec_ptr, arelent **, asymbol **);

extern long NAME (aout, get_reloc_upper_bound)
  (bfd *, sec_ptr);

extern void NAME (aout, reclaim_reloc)
  (bfd *, sec_ptr);

extern alent * NAME (aout, get_lineno)
  (bfd *, asymbol *);

extern void NAME (aout, print_symbol)
  (bfd *, void *, asymbol *, bfd_print_symbol_type);

extern void NAME (aout, get_symbol_info)
  (bfd *, asymbol *, symbol_info *);

extern bool NAME (aout, find_nearest_line)
  (bfd *, asymbol **, asection *, bfd_vma,
   const char **, const char **, unsigned int *, unsigned int *);

extern long NAME (aout, read_minisymbols)
  (bfd *, bool, void * *, unsigned int *);

extern asymbol * NAME (aout, minisymbol_to_symbol)
  (bfd *, bool, const void *, asymbol *);

extern int NAME (aout, sizeof_headers)
  (bfd *, struct bfd_link_info *);

extern bool NAME (aout, adjust_sizes_and_vmas)
  (bfd *);

extern void NAME (aout, swap_exec_header_in)
  (bfd *, struct external_exec *, struct internal_exec *);

extern void NAME (aout, swap_exec_header_out)
  (bfd *, struct internal_exec *, struct external_exec *);

extern struct bfd_hash_entry * NAME (aout, link_hash_newfunc)
  (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);

extern bool NAME (aout, link_hash_table_init)
  (struct aout_link_hash_table *, bfd *,
   struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
			       struct bfd_hash_table *,
			       const char *),
   unsigned int);

extern struct bfd_link_hash_table * NAME (aout, link_hash_table_create)
  (bfd *);

extern bool NAME (aout, link_add_symbols)
  (bfd *, struct bfd_link_info *);

extern bool NAME (aout, final_link)
  (bfd *, struct bfd_link_info *,
   void (*) (bfd *, file_ptr *, file_ptr *, file_ptr *));

extern bool NAME (aout, bfd_free_cached_info)
  (bfd *);

#define aout_32_find_inliner_info	_bfd_nosymbols_find_inliner_info
#if 0	/* Are these needed? */
#define aout_16_find_inliner_info	_bfd_nosymbols_find_inliner_info
#define aout_64_find_inliner_info	_bfd_nosymbols_find_inliner_info
#endif

/* A.out uses the generic versions of these routines...  */

#define	aout_16_get_section_contents	_bfd_generic_get_section_contents

#define	aout_32_get_section_contents	_bfd_generic_get_section_contents

#define	aout_64_get_section_contents	_bfd_generic_get_section_contents

#ifndef aout_32_bfd_is_local_label_name
#define aout_32_bfd_is_local_label_name bfd_generic_is_local_label_name
#endif

#ifndef aout_32_bfd_is_target_special_symbol
#define aout_32_bfd_is_target_special_symbol _bfd_bool_bfd_asymbol_false
#endif

#ifndef WRITE_HEADERS
#define WRITE_HEADERS(abfd, execp)					\
  {									\
    if (adata(abfd).magic == undecided_magic)				\
      NAME (aout, adjust_sizes_and_vmas) (abfd);			\
									\
    execp->a_syms = bfd_get_symcount (abfd) * EXTERNAL_NLIST_SIZE;	\
    execp->a_entry = bfd_get_start_address (abfd);			\
									\
    execp->a_trsize = ((obj_textsec (abfd)->reloc_count)		\
		       * obj_reloc_entry_size (abfd));			\
    execp->a_drsize = ((obj_datasec (abfd)->reloc_count)		\
		       * obj_reloc_entry_size (abfd));			\
    NAME (aout, swap_exec_header_out) (abfd, execp, &exec_bytes);	\
									\
    if (bfd_seek (abfd, 0, SEEK_SET) != 0				\
	|| bfd_write (&exec_bytes, EXEC_BYTES_SIZE,			\
		      abfd) != EXEC_BYTES_SIZE)				\
      return false;							\
    /* Now write out reloc info, followed by syms and strings.  */	\
									\
    if (bfd_get_outsymbols (abfd) != NULL				\
	&& bfd_get_symcount (abfd) != 0)				\
      {									\
	if (bfd_seek (abfd, N_SYMOFF (execp), SEEK_SET) != 0)		\
	  return false;							\
									\
	if (! NAME (aout, write_syms) (abfd))				\
	  return false;							\
      }									\
									\
    if (bfd_seek (abfd, N_TRELOFF (execp), SEEK_SET) != 0)		\
      return false;							\
    if (!NAME (aout, squirt_out_relocs) (abfd, obj_textsec (abfd)))	\
      return false;							\
									\
    if (bfd_seek (abfd, N_DRELOFF (execp), SEEK_SET) != 0)		\
      return false;							\
    if (!NAME (aout, squirt_out_relocs) (abfd, obj_datasec (abfd)))	\
      return false;							\
  }
#endif

/* Test if a read-only section can be merged with .text.  This is
   possible if:

   1. Section has file contents and is read-only.
   2. The VMA of the section is after the end of .text and before
      the start of .data.
   3. The image is demand-pageable (otherwise, a_text in the header
      will not reflect the gap between .text and .data).  */

#define aout_section_merge_with_text_p(abfd, sec)			\
  (((sec)->flags & (SEC_HAS_CONTENTS | SEC_READONLY)) ==		\
      (SEC_HAS_CONTENTS | SEC_READONLY)					\
   && obj_textsec (abfd) != NULL					\
   && obj_datasec (abfd) != NULL					\
   && (sec)->vma >= (obj_textsec (abfd)->vma +				\
		     obj_textsec (abfd)->size)				\
   && ((sec)->vma + (sec)->size) <= obj_datasec (abfd)->vma		\
   && ((abfd)->flags & D_PAGED) != 0)

#endif /* ! defined (LIBAOUT_H) */