[deliverable/binutils-gdb.git] / bfd / binary.c

/* BFD back-end for binary objects.
   Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000
   Free Software Foundation, Inc.
   Written by Ian Lance Taylor, Cygnus Support, <ian@cygnus.com>

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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* This is a BFD backend which may be used to write binary objects.
   It may only be used for output, not input.  The intention is that
   this may be used as an output format for objcopy in order to
   generate raw binary data.

   This is very simple.  The only complication is that the real data
   will start at some address X, and in some cases we will not want to
   include X zeroes just to get to that point.  Since the start
   address is not meaningful for this object file format, we use it
   instead to indicate the number of zeroes to skip at the start of
   the file.  objcopy cooperates by specially setting the start
   address to zero by default.  */

#include <ctype.h>

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"

/* Any bfd we create by reading a binary file has three symbols:
   a start symbol, an end symbol, and an absolute length symbol.  */
#define BIN_SYMS 3

static boolean binary_mkobject PARAMS ((bfd *));
static const bfd_target *binary_object_p PARAMS ((bfd *));
static boolean binary_get_section_contents
  PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
static long binary_get_symtab_upper_bound PARAMS ((bfd *));
static char *mangle_name PARAMS ((bfd *, char *));
static long binary_get_symtab PARAMS ((bfd *, asymbol **));
static asymbol *binary_make_empty_symbol PARAMS ((bfd *));
static void binary_get_symbol_info PARAMS ((bfd *, asymbol *, symbol_info *));
static boolean binary_set_section_contents
  PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
static int binary_sizeof_headers PARAMS ((bfd *, boolean));

/* Set by external programs - specifies the BFD architecture
   to use when creating binary BFDs.  */
enum bfd_architecture bfd_external_binary_architecture = bfd_arch_unknown;

/* Create a binary object.  Invoked via bfd_set_format.  */

static boolean
binary_mkobject (abfd)
     bfd *abfd ATTRIBUTE_UNUSED;
{
  return true;
}

/* Any file may be considered to be a binary file, provided the target
   was not defaulted.  That is, it must be explicitly specified as
   being binary.  */

static const bfd_target *
binary_object_p (abfd)
     bfd *abfd;
{
  struct stat statbuf;
  asection *sec;

  if (abfd->target_defaulted)
    {
      bfd_set_error (bfd_error_wrong_format);
      return NULL;
    }

  abfd->symcount = BIN_SYMS;

  /* Find the file size.  */
  if (bfd_stat (abfd, &statbuf) < 0)
    {
      bfd_set_error (bfd_error_system_call);
      return NULL;
    }

  /* One data section.  */
  sec = bfd_make_section (abfd, ".data");
  if (sec == NULL)
    return NULL;
  sec->flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS;
  sec->vma = 0;
  sec->_raw_size = statbuf.st_size;
  sec->filepos = 0;

  abfd->tdata.any = (PTR) sec;

  if (bfd_get_arch_info (abfd) != NULL)
    {
      if ((bfd_get_arch_info (abfd)->arch == bfd_arch_unknown)
          && (bfd_external_binary_architecture != bfd_arch_unknown))
        bfd_set_arch_info (abfd, bfd_lookup_arch (bfd_external_binary_architecture, 0));
    }
  
  return abfd->xvec;
}

#define binary_close_and_cleanup _bfd_generic_close_and_cleanup
#define binary_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
#define binary_new_section_hook _bfd_generic_new_section_hook

/* Get contents of the only section.  */

static boolean
binary_get_section_contents (abfd, section, location, offset, count)
     bfd *abfd;
     asection *section ATTRIBUTE_UNUSED;
     PTR location;
     file_ptr offset;
     bfd_size_type count;
{
  if (bfd_seek (abfd, offset, SEEK_SET) != 0
      || bfd_read (location, 1, count, abfd) != count)
    return false;
  return true;
}

/* Return the amount of memory needed to read the symbol table.  */

static long
binary_get_symtab_upper_bound (abfd)
     bfd *abfd ATTRIBUTE_UNUSED;
{
  return (BIN_SYMS + 1) * sizeof (asymbol *);
}

/* Create a symbol name based on the bfd's filename.  */

static char *
mangle_name (abfd, suffix)
     bfd *abfd;
     char *suffix;
{
  int size;
  char *buf;
  char *p;

  size = (strlen (bfd_get_filename (abfd))
	  + strlen (suffix)
	  + sizeof "_binary__");

  buf = (char *) bfd_alloc (abfd, size);
  if (buf == NULL)
    return "";

  sprintf (buf, "_binary_%s_%s", bfd_get_filename (abfd), suffix);

  /* Change any non-alphanumeric characters to underscores.  */
  for (p = buf; *p; p++)
    if (! isalnum ((unsigned char) *p))
      *p = '_';

  return buf;
}

/* Return the symbol table.  */

static long
binary_get_symtab (abfd, alocation)
     bfd *abfd;
     asymbol **alocation;
{
  asection *sec = (asection *) abfd->tdata.any;
  asymbol *syms;
  unsigned int i;

  syms = (asymbol *) bfd_alloc (abfd, BIN_SYMS * sizeof (asymbol));
  if (syms == NULL)
    return false;

  /* Start symbol.  */
  syms[0].the_bfd = abfd;
  syms[0].name = mangle_name (abfd, "start");
  syms[0].value = 0;
  syms[0].flags = BSF_GLOBAL;
  syms[0].section = sec;
  syms[0].udata.p = NULL;

  /* End symbol.  */
  syms[1].the_bfd = abfd;
  syms[1].name = mangle_name (abfd, "end");
  syms[1].value = sec->_raw_size;
  syms[1].flags = BSF_GLOBAL;
  syms[1].section = sec;
  syms[1].udata.p = NULL;

  /* Size symbol.  */
  syms[2].the_bfd = abfd;
  syms[2].name = mangle_name (abfd, "size");
  syms[2].value = sec->_raw_size;
  syms[2].flags = BSF_GLOBAL;
  syms[2].section = bfd_abs_section_ptr;
  syms[2].udata.p = NULL;

  for (i = 0; i < BIN_SYMS; i++)
    *alocation++ = syms++;
  *alocation = NULL;

  return BIN_SYMS;
}

/* Make an empty symbol.  */

static asymbol *
binary_make_empty_symbol (abfd)
     bfd *abfd;
{
  return (asymbol *) bfd_alloc (abfd, sizeof (asymbol));
}

#define binary_print_symbol _bfd_nosymbols_print_symbol

/* Get information about a symbol.  */

static void
binary_get_symbol_info (ignore_abfd, symbol, ret)
     bfd *ignore_abfd ATTRIBUTE_UNUSED;
     asymbol *symbol;
     symbol_info *ret;
{
  bfd_symbol_info (symbol, ret);
}

#define binary_bfd_is_local_label_name bfd_generic_is_local_label_name
#define binary_get_lineno _bfd_nosymbols_get_lineno
#define binary_find_nearest_line _bfd_nosymbols_find_nearest_line
#define binary_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
#define binary_read_minisymbols _bfd_generic_read_minisymbols
#define binary_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol

#define binary_get_reloc_upper_bound \
  ((long (*) PARAMS ((bfd *, asection *))) bfd_0l)
#define binary_canonicalize_reloc \
  ((long (*) PARAMS ((bfd *, asection *, arelent **, asymbol **))) bfd_0l)
#define binary_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup

/* Set the architecture of a binary file.  */
#define binary_set_arch_mach _bfd_generic_set_arch_mach

/* Write section contents of a binary file.  */

static boolean
binary_set_section_contents (abfd, sec, data, offset, size)
     bfd *abfd;
     asection *sec;
     PTR data;
     file_ptr offset;
     bfd_size_type size;
{
  if (size == 0)
    return true;

  if (! abfd->output_has_begun)
    {
      boolean found_low;
      bfd_vma low;
      asection *s;

      /* The lowest section LMA sets the virtual address of the start
         of the file.  We use this to set the file position of all the
         sections.  */
      found_low = false;
      low = 0;
      for (s = abfd->sections; s != NULL; s = s->next)
	if (((s->flags
	      & (SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_NEVER_LOAD))
	     == (SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC))
	    && (s->_raw_size > 0)
	    && (! found_low || s->lma < low))
	  {
	    low = s->lma;
	    found_low = true;
	  }

      for (s = abfd->sections; s != NULL; s = s->next)
	{
	  s->filepos = s->lma - low;

	  /* Skip following warning check for sections that will not
	     occupy file space.  */
	  if ((s->flags
	       & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_NEVER_LOAD))
	      != (SEC_HAS_CONTENTS | SEC_ALLOC)
	      || (s->_raw_size == 0))
	    continue;

	  /* If attempting to generate a binary file from a bfd with
	     LMA's all over the place, huge (sparse?) binary files may
	     result.  This condition attempts to detect this situation
	     and print a warning.  Better heuristics would be nice to
	     have.  */

	  if (s->filepos < 0)
	    (*_bfd_error_handler)
	      (_("Warning: Writing section `%s' to huge (ie negative) file offset 0x%lx."),
	       bfd_get_section_name (abfd, s),
	       (unsigned long) s->filepos);
	}

      abfd->output_has_begun = true;
    }

  /* We don't want to output anything for a section that is neither
     loaded nor allocated.  The contents of such a section are not
     meaningful in the binary format.  */
  if ((sec->flags & (SEC_LOAD | SEC_ALLOC)) == 0)
    return true;
  if ((sec->flags & SEC_NEVER_LOAD) != 0)
    return true;

  return _bfd_generic_set_section_contents (abfd, sec, data, offset, size);
}

/* No space is required for header information.  */

static int
binary_sizeof_headers (abfd, exec)
     bfd *abfd ATTRIBUTE_UNUSED;
     boolean exec ATTRIBUTE_UNUSED;
{
  return 0;
}

#define binary_bfd_get_relocated_section_contents \
  bfd_generic_get_relocated_section_contents
#define binary_bfd_relax_section bfd_generic_relax_section
#define binary_bfd_gc_sections bfd_generic_gc_sections
#define binary_bfd_merge_sections bfd_generic_merge_sections
#define binary_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
#define binary_bfd_link_add_symbols _bfd_generic_link_add_symbols
#define binary_bfd_final_link _bfd_generic_final_link
#define binary_bfd_link_split_section _bfd_generic_link_split_section
#define binary_get_section_contents_in_window \
  _bfd_generic_get_section_contents_in_window

const bfd_target binary_vec =
{
  "binary",			/* name */
  bfd_target_unknown_flavour,	/* flavour */
  BFD_ENDIAN_UNKNOWN,		/* byteorder */
  BFD_ENDIAN_UNKNOWN,		/* header_byteorder */
  EXEC_P,			/* object_flags */
  (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_DATA
   | SEC_ROM | SEC_HAS_CONTENTS), /* section_flags */
  0,				/* symbol_leading_char */
  ' ',				/* ar_pad_char */
  16,				/* ar_max_namelen */
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16,	/* data */
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
  bfd_getb32, bfd_getb_signed_32, bfd_putb32,
  bfd_getb16, bfd_getb_signed_16, bfd_putb16,	/* hdrs */
  {				/* bfd_check_format */
    _bfd_dummy_target,
    binary_object_p,		/* bfd_check_format */
    _bfd_dummy_target,
    _bfd_dummy_target,
  },
  {				/* bfd_set_format */
    bfd_false,
    binary_mkobject,
    bfd_false,
    bfd_false,
  },
  {				/* bfd_write_contents */
    bfd_false,
    bfd_true,
    bfd_false,
    bfd_false,
  },

  BFD_JUMP_TABLE_GENERIC (binary),
  BFD_JUMP_TABLE_COPY (_bfd_generic),
  BFD_JUMP_TABLE_CORE (_bfd_nocore),
  BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
  BFD_JUMP_TABLE_SYMBOLS (binary),
  BFD_JUMP_TABLE_RELOCS (binary),
  BFD_JUMP_TABLE_WRITE (binary),
  BFD_JUMP_TABLE_LINK (binary),
  BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),

  NULL,

  NULL
};
Commit	Line	Data
252b5132	1	/* BFD back-end for binary objects.
7898deda NC	2	Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000
7898deda NC	3	Free Software Foundation, Inc.
252b5132 RH	4	Written by Ian Lance Taylor, Cygnus Support, <ian@cygnus.com>
	5
	6	This file is part of BFD, the Binary File Descriptor library.
	7
	8	This program is free software; you can redistribute it and/or modify
	9	it under the terms of the GNU General Public License as published by
	10	the Free Software Foundation; either version 2 of the License, or
	11	(at your option) any later version.
	12
	13	This program is distributed in the hope that it will be useful,
	14	but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	GNU General Public License for more details.
	17
	18	You should have received a copy of the GNU General Public License
	19	along with this program; if not, write to the Free Software
	20	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
	21
	22	/* This is a BFD backend which may be used to write binary objects.
	23	It may only be used for output, not input. The intention is that
	24	this may be used as an output format for objcopy in order to
	25	generate raw binary data.
	26
	27	This is very simple. The only complication is that the real data
	28	will start at some address X, and in some cases we will not want to
	29	include X zeroes just to get to that point. Since the start
	30	address is not meaningful for this object file format, we use it
	31	instead to indicate the number of zeroes to skip at the start of
	32	the file. objcopy cooperates by specially setting the start
	33	address to zero by default. */
	34
	35	#include <ctype.h>
	36
	37	#include "bfd.h"
	38	#include "sysdep.h"
	39	#include "libbfd.h"
	40
	41	/* Any bfd we create by reading a binary file has three symbols:
	42	a start symbol, an end symbol, and an absolute length symbol. */
	43	#define BIN_SYMS 3
	44
	45	static boolean binary_mkobject PARAMS ((bfd *));
	46	static const bfd_target binary_object_p PARAMS ((bfd ));
	47	static boolean binary_get_section_contents
	48	PARAMS ((bfd , asection , PTR, file_ptr, bfd_size_type));
	49	static long binary_get_symtab_upper_bound PARAMS ((bfd *));
	50	static char mangle_name PARAMS ((bfd , char *));
	51	static long binary_get_symtab PARAMS ((bfd , asymbol *));
	52	static asymbol binary_make_empty_symbol PARAMS ((bfd ));
	53	static void binary_get_symbol_info PARAMS ((bfd , asymbol , symbol_info *));
	54	static boolean binary_set_section_contents
	55	PARAMS ((bfd , asection , PTR, file_ptr, bfd_size_type));
	56	static int binary_sizeof_headers PARAMS ((bfd *, boolean));
	57
43a0748c NC	58	/* Set by external programs - specifies the BFD architecture
	59	to use when creating binary BFDs. */
	60	enum bfd_architecture bfd_external_binary_architecture = bfd_arch_unknown;
	61
252b5132 RH	62	/* Create a binary object. Invoked via bfd_set_format. */
	63
	64	static boolean
	65	binary_mkobject (abfd)
7442e600	66	bfd *abfd ATTRIBUTE_UNUSED;
252b5132 RH	67	{
	68	return true;
	69	}
	70
	71	/* Any file may be considered to be a binary file, provided the target
	72	was not defaulted. That is, it must be explicitly specified as
	73	being binary. */
	74
	75	static const bfd_target *
	76	binary_object_p (abfd)
	77	bfd *abfd;
	78	{
	79	struct stat statbuf;
	80	asection *sec;
	81
	82	if (abfd->target_defaulted)
	83	{
	84	bfd_set_error (bfd_error_wrong_format);
	85	return NULL;
	86	}
	87
	88	abfd->symcount = BIN_SYMS;
	89
	90	/* Find the file size. */
	91	if (bfd_stat (abfd, &statbuf) < 0)
	92	{
	93	bfd_set_error (bfd_error_system_call);
	94	return NULL;
	95	}
	96
	97	/* One data section. */
	98	sec = bfd_make_section (abfd, ".data");
	99	if (sec == NULL)
	100	return NULL;
	101	sec->flags = SEC_ALLOC \| SEC_LOAD \| SEC_DATA \| SEC_HAS_CONTENTS;
	102	sec->vma = 0;
	103	sec->_raw_size = statbuf.st_size;
	104	sec->filepos = 0;
	105
	106	abfd->tdata.any = (PTR) sec;
	107
43a0748c NC	108	if (bfd_get_arch_info (abfd) != NULL)
	109	{
	110	if ((bfd_get_arch_info (abfd)->arch == bfd_arch_unknown)
	111	&& (bfd_external_binary_architecture != bfd_arch_unknown))
	112	bfd_set_arch_info (abfd, bfd_lookup_arch (bfd_external_binary_architecture, 0));
	113	}
	114
252b5132 RH	115	return abfd->xvec;
	116	}
	117
	118	#define binary_close_and_cleanup _bfd_generic_close_and_cleanup
	119	#define binary_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
	120	#define binary_new_section_hook _bfd_generic_new_section_hook
	121
	122	/* Get contents of the only section. */
	123
	124	static boolean
	125	binary_get_section_contents (abfd, section, location, offset, count)
	126	bfd *abfd;
7442e600	127	asection *section ATTRIBUTE_UNUSED;
252b5132 RH	128	PTR location;
	129	file_ptr offset;
	130	bfd_size_type count;
	131	{
	132	if (bfd_seek (abfd, offset, SEEK_SET) != 0
	133	\|\| bfd_read (location, 1, count, abfd) != count)
	134	return false;
	135	return true;
	136	}
	137
	138	/* Return the amount of memory needed to read the symbol table. */
	139
	140	static long
	141	binary_get_symtab_upper_bound (abfd)
7442e600	142	bfd *abfd ATTRIBUTE_UNUSED;
252b5132 RH	143	{
	144	return (BIN_SYMS + 1) * sizeof (asymbol *);
	145	}
	146
	147	/* Create a symbol name based on the bfd's filename. */
	148
	149	static char *
	150	mangle_name (abfd, suffix)
	151	bfd *abfd;
	152	char *suffix;
	153	{
	154	int size;
	155	char *buf;
	156	char *p;
	157
	158	size = (strlen (bfd_get_filename (abfd))
	159	+ strlen (suffix)
	160	+ sizeof "_binary__");
	161
	162	buf = (char *) bfd_alloc (abfd, size);
	163	if (buf == NULL)
	164	return "";
	165
	166	sprintf (buf, "_binary_%s_%s", bfd_get_filename (abfd), suffix);
	167
	168	/* Change any non-alphanumeric characters to underscores. */
	169	for (p = buf; *p; p++)
	170	if (! isalnum ((unsigned char) *p))
	171	*p = '_';
	172
	173	return buf;
	174	}
	175
	176	/* Return the symbol table. */
	177
	178	static long
	179	binary_get_symtab (abfd, alocation)
	180	bfd *abfd;
	181	asymbol **alocation;
	182	{
	183	asection sec = (asection ) abfd->tdata.any;
	184	asymbol *syms;
	185	unsigned int i;
	186
	187	syms = (asymbol ) bfd_alloc (abfd, BIN_SYMS sizeof (asymbol));
	188	if (syms == NULL)
	189	return false;
	190
	191	/* Start symbol. */
	192	syms[0].the_bfd = abfd;
	193	syms[0].name = mangle_name (abfd, "start");
	194	syms[0].value = 0;
	195	syms[0].flags = BSF_GLOBAL;
	196	syms[0].section = sec;
	197	syms[0].udata.p = NULL;
	198
	199	/* End symbol. */
	200	syms[1].the_bfd = abfd;
	201	syms[1].name = mangle_name (abfd, "end");
	202	syms[1].value = sec->_raw_size;
	203	syms[1].flags = BSF_GLOBAL;
	204	syms[1].section = sec;
	205	syms[1].udata.p = NULL;
	206
207	/* Size symbol. */
208	syms[2].the_bfd = abfd;
209	syms[2].name = mangle_name (abfd, "size");
210	syms[2].value = sec->_raw_size;
211	syms[2].flags = BSF_GLOBAL;
212	syms[2].section = bfd_abs_section_ptr;
213	syms[2].udata.p = NULL;
214
215	for (i = 0; i < BIN_SYMS; i++)
216	*alocation++ = syms++;
217	*alocation = NULL;
218
219	return BIN_SYMS;
220	}
221
222	/* Make an empty symbol. */
223
224	static asymbol *
225	binary_make_empty_symbol (abfd)
226	bfd *abfd;
227	{
228	return (asymbol *) bfd_alloc (abfd, sizeof (asymbol));
229	}
230
231	#define binary_print_symbol _bfd_nosymbols_print_symbol
232
233	/* Get information about a symbol. */
234
235	static void
236	binary_get_symbol_info (ignore_abfd, symbol, ret)
7442e600	237	bfd *ignore_abfd ATTRIBUTE_UNUSED;
252b5132 RH	238	asymbol *symbol;
	239	symbol_info *ret;
	240	{
	241	bfd_symbol_info (symbol, ret);
	242	}
	243
	244	#define binary_bfd_is_local_label_name bfd_generic_is_local_label_name
	245	#define binary_get_lineno _bfd_nosymbols_get_lineno
	246	#define binary_find_nearest_line _bfd_nosymbols_find_nearest_line
	247	#define binary_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
	248	#define binary_read_minisymbols _bfd_generic_read_minisymbols
	249	#define binary_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
	250
	251	#define binary_get_reloc_upper_bound \
	252	((long () PARAMS ((bfd , asection *))) bfd_0l)
	253	#define binary_canonicalize_reloc \
	254	((long () PARAMS ((bfd , asection , arelent , asymbol *))) bfd_0l)
	255	#define binary_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
	256
	257	/* Set the architecture of a binary file. */
	258	#define binary_set_arch_mach _bfd_generic_set_arch_mach
	259
	260	/* Write section contents of a binary file. */
	261
	262	static boolean
	263	binary_set_section_contents (abfd, sec, data, offset, size)
	264	bfd *abfd;
	265	asection *sec;
	266	PTR data;
	267	file_ptr offset;
	268	bfd_size_type size;
	269	{
3a71aec8 NC	270	if (size == 0)
	271	return true;
	272
252b5132 RH	273	if (! abfd->output_has_begun)
	274	{
	275	boolean found_low;
	276	bfd_vma low;
	277	asection *s;
	278
	279	/* The lowest section LMA sets the virtual address of the start
	280	of the file. We use this to set the file position of all the
	281	sections. */
	282	found_low = false;
	283	low = 0;
	284	for (s = abfd->sections; s != NULL; s = s->next)
	285	if (((s->flags
	286	& (SEC_HAS_CONTENTS \| SEC_LOAD \| SEC_ALLOC \| SEC_NEVER_LOAD))
	287	== (SEC_HAS_CONTENTS \| SEC_LOAD \| SEC_ALLOC))
3a71aec8	288	&& (s->_raw_size > 0)
252b5132 RH	289	&& (! found_low \|\| s->lma < low))
	290	{
	291	low = s->lma;
	292	found_low = true;
	293	}
	294
	295	for (s = abfd->sections; s != NULL; s = s->next)
	296	{
	297	s->filepos = s->lma - low;
	298
	299	/* Skip following warning check for sections that will not
aebad5fe	300	occupy file space. */
252b5132 RH	301	if ((s->flags
252b5132 RH	302	& (SEC_HAS_CONTENTS \| SEC_ALLOC \| SEC_NEVER_LOAD))
3a71aec8 NC	303	!= (SEC_HAS_CONTENTS \| SEC_ALLOC)
3a71aec8 NC	304	\|\| (s->_raw_size == 0))
252b5132 RH	305	continue;
	306
	307	/* If attempting to generate a binary file from a bfd with
	308	LMA's all over the place, huge (sparse?) binary files may
	309	result. This condition attempts to detect this situation
	310	and print a warning. Better heuristics would be nice to
aebad5fe	311	have. */
252b5132 RH	312
	313	if (s->filepos < 0)
	314	(*_bfd_error_handler)
	315	(_("Warning: Writing section `%s' to huge (ie negative) file offset 0x%lx."),
	316	bfd_get_section_name (abfd, s),
	317	(unsigned long) s->filepos);
	318	}
	319
	320	abfd->output_has_begun = true;
	321	}
	322
	323	/* We don't want to output anything for a section that is neither
	324	loaded nor allocated. The contents of such a section are not
	325	meaningful in the binary format. */
	326	if ((sec->flags & (SEC_LOAD \| SEC_ALLOC)) == 0)
	327	return true;
	328	if ((sec->flags & SEC_NEVER_LOAD) != 0)
	329	return true;
	330
	331	return _bfd_generic_set_section_contents (abfd, sec, data, offset, size);
	332	}
	333
	334	/* No space is required for header information. */
	335
	336	static int
	337	binary_sizeof_headers (abfd, exec)
7442e600 ILT	338	bfd *abfd ATTRIBUTE_UNUSED;
7442e600 ILT	339	boolean exec ATTRIBUTE_UNUSED;
252b5132 RH	340	{
	341	return 0;
	342	}
	343
	344	#define binary_bfd_get_relocated_section_contents \
	345	bfd_generic_get_relocated_section_contents
	346	#define binary_bfd_relax_section bfd_generic_relax_section
	347	#define binary_bfd_gc_sections bfd_generic_gc_sections
8550eb6e	348	#define binary_bfd_merge_sections bfd_generic_merge_sections
252b5132 RH	349	#define binary_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
	350	#define binary_bfd_link_add_symbols _bfd_generic_link_add_symbols
	351	#define binary_bfd_final_link _bfd_generic_final_link
	352	#define binary_bfd_link_split_section _bfd_generic_link_split_section
	353	#define binary_get_section_contents_in_window \
	354	_bfd_generic_get_section_contents_in_window
	355
	356	const bfd_target binary_vec =
	357	{
	358	"binary", /* name */
	359	bfd_target_unknown_flavour, /* flavour */
	360	BFD_ENDIAN_UNKNOWN, /* byteorder */
	361	BFD_ENDIAN_UNKNOWN, /* header_byteorder */
	362	EXEC_P, /* object_flags */
	363	(SEC_ALLOC \| SEC_LOAD \| SEC_READONLY \| SEC_CODE \| SEC_DATA
	364	\| SEC_ROM \| SEC_HAS_CONTENTS), /* section_flags */
	365	0, /* symbol_leading_char */
	366	' ', /* ar_pad_char */
	367	16, /* ar_max_namelen */
	368	bfd_getb64, bfd_getb_signed_64, bfd_putb64,
	369	bfd_getb32, bfd_getb_signed_32, bfd_putb32,
	370	bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
	371	bfd_getb64, bfd_getb_signed_64, bfd_putb64,
	372	bfd_getb32, bfd_getb_signed_32, bfd_putb32,
	373	bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
	374	{ /* bfd_check_format */
	375	_bfd_dummy_target,
	376	binary_object_p, /* bfd_check_format */
	377	_bfd_dummy_target,
	378	_bfd_dummy_target,
	379	},
	380	{ /* bfd_set_format */
	381	bfd_false,
	382	binary_mkobject,
	383	bfd_false,
	384	bfd_false,
	385	},
	386	{ /* bfd_write_contents */
	387	bfd_false,
	388	bfd_true,
	389	bfd_false,
	390	bfd_false,
	391	},
	392
	393	BFD_JUMP_TABLE_GENERIC (binary),
	394	BFD_JUMP_TABLE_COPY (_bfd_generic),
	395	BFD_JUMP_TABLE_CORE (_bfd_nocore),
	396	BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
	397	BFD_JUMP_TABLE_SYMBOLS (binary),
	398	BFD_JUMP_TABLE_RELOCS (binary),
	399	BFD_JUMP_TABLE_WRITE (binary),
	400	BFD_JUMP_TABLE_LINK (binary),
	401	BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
	402
c3c89269	403	NULL,
aebad5fe	404
252b5132 RH	405	NULL
252b5132 RH	406	};