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

/* BFD semi-generic back-end for a.out binaries */

/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.

This file is part of BFD, the Binary File Diddler.

BFD 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 1, or (at your option)
any later version.

BFD 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 BFD; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */


#include <ansidecl.h>
#include <sysdep.h>
#include "bfd.h"
#include "libbfd.h"

#include "a.out.gnu.h"
#include "stab.gnu.h"
#include "ar.h"
#include "liba.out.h"           /* BFD a.out internal data structures */

void (*bfd_error_trap)();

/*SUPPRESS558*/
/*SUPPRESS529*/

#define CTOR_TABLE_RELOC_IDX 2
static  reloc_howto_type howto_table_ext[] = 
{
  HOWTO(RELOC_8,      0,  0,  	8,  false, 0, true,  true,0,"8",      false, 0,0x000000ff, false),
  HOWTO(RELOC_16,     0,  1, 	16, false, 0, true,  true,0,"16",      false, 0,0x0000ffff, false),
  HOWTO(RELOC_32,     0,  2, 	32, false, 0, true,  true,0,"32",      false, 0,0xffffffff, false),
  HOWTO(RELOC_DISP8,  0,  0, 	8,  true,  0, false, true,0,"DISP8", 	false, 0,0x000000ff, false),
  HOWTO(RELOC_DISP16, 0,  1, 	16, true,  0, false, true,0,"DISP16", 	false, 0,0x0000ffff, false),
  HOWTO(RELOC_DISP32, 0,  2, 	32, true,  0, false, true,0,"DISP32", 	false, 0,0xffffffff, false),
  HOWTO(RELOC_WDISP30,2,  2, 	30, true,  0, false, true,0,"WDISP30", 	false, 0,0x3fffffff, false),
  HOWTO(RELOC_WDISP22,2,  2, 	22, true,  0, false, true,0,"WDISP22", 	false, 0,0x003fffff, false),
  HOWTO(RELOC_HI22,   10, 2, 	22, false, 0, false, true,0,"HI22",	false, 0,0x003fffff, false),
  HOWTO(RELOC_22,      0, 2, 	22, false, 0, false, true,0,"22",       false, 0,0x003fffff, false),
  HOWTO(RELOC_13, 	0, 2, 	13, false, 0, false, true,0,"13",       false, 0,0x00001fff, false),
  HOWTO(RELOC_LO10, 	0, 2, 	10, false, 0, false, true,0,"LO10",     false, 0,0x000003ff, false),
  HOWTO(RELOC_SFA_BASE,0, 2, 	32, false, 0, false, true,0,"SFA_BASE", false, 0,0xffffffff, false),
  HOWTO(RELOC_SFA_OFF13,0,2, 	32, false, 0, false, true,0,"SFA_OFF13",false, 0,0xffffffff, false),
  HOWTO(RELOC_BASE10, 0,  2, 	16, false, 0, false, true,0,"BASE10",   false, 0,0x0000ffff, false),
  HOWTO(RELOC_BASE13, 0,  2,	13, false, 0, false, true,0,"BASE13",   false, 0,0x00001fff, false),
  HOWTO(RELOC_BASE22, 0,  2,	0,  false, 0, false, true,0,"BASE22",   false, 0,0x00000000, false),
  HOWTO(RELOC_PC10,   0,  2,	10, false, 0, false, true,0,"PC10",	false, 0,0x000003ff, false),
  HOWTO(RELOC_PC22,   0,  2,	22, false, 0, false, true,0,"PC22",	false, 0,0x003fffff, false),
  HOWTO(RELOC_JMP_TBL,0,  2,	32, false, 0, false, true,0,"JMP_TBL",	false, 0,0xffffffff, false),
  HOWTO(RELOC_SEGOFF16,0, 2,	0,  false, 0, false, true,0,"SEGOFF16",	false, 0,0x00000000, false),
  HOWTO(RELOC_GLOB_DAT,0, 2,	0,  false, 0, false, true,0,"GLOB_DAT",	false, 0,0x00000000, false),
  HOWTO(RELOC_JMP_SLOT,0, 2,	0,  false, 0, false, true,0,"JMP_SLOT",	false, 0,0x00000000, false),
  HOWTO(RELOC_RELATIVE,0, 2,	0,  false, 0, false, true,0,"RELATIVE",	false, 0,0x00000000, false),
  HOWTO(RELOC_JUMPTARG,2, 13,	16, true,  0, false, true,0,"JUMPTARG",	false, 0,0x0000ffff, false),
  HOWTO(RELOC_CONST,	0, 13,	16, false, 0, false, true,0,"CONST",	false, 0,0x0000ffff, false),
  HOWTO(RELOC_CONSTH, 16, 13,	16, false, 0, false, true,0,"CONSTH",	false, 0,0x0000ffff, false),
};

/* Convert standard reloc records to "arelent" format (incl byte swap).  */

static  reloc_howto_type howto_table_std[] = {
  /* type           rs   size bsz  pcrel bitpos  abs ovrf sf name    part_inpl   readmask  setmask  pcdone */
HOWTO( 0,	       0,  0,  	8,  false, 0, true,  true,0,"8",	true, 0x000000ff,0x000000ff, false),
HOWTO( 1,	       0,  1, 	16, false, 0, true,  true,0,"16",	true, 0x0000ffff,0x0000ffff, false),
HOWTO( 2,	       0,  2, 	32, false, 0, true,  true,0,"32",	true, 0xffffffff,0xffffffff, false),
HOWTO( 3,	       0,  3, 	64, false, 0, true,  true,0,"64",       true, 0xdeaddead,0xdeaddead, false),
HOWTO( 4,	       0,  0, 	8,  true,  0, false, true,0,"DISP8",    true, 0x000000ff,0x000000ff, false),
HOWTO( 5,	       0,  1, 	16, true,  0, false, true,0,"DISP16",   true, 0x0000ffff,0x0000ffff, false),
HOWTO( 6,	       0,  2, 	32, true,  0, false, true,0,"DISP32",   true, 0xffffffff,0xffffffff, false),
HOWTO( 7,	       0,  3, 	64, true,  0, false, true,0,"DISP64",   true, 0xfeedface,0xfeedface, false),
};


bfd_error_vector_type bfd_error_vector;

void
DEFUN(bfd_aout_swap_exec_header_in,(abfd, raw_bytes, execp),
      bfd *abfd AND
      unsigned char *raw_bytes AND
      struct exec *execp)
{
  struct exec_bytes *bytes = (struct exec_bytes *)raw_bytes;

  /* Now fill in fields in the execp, from the bytes in the raw data.  */
  execp->a_info   = bfd_h_getlong (abfd, bytes->a_info);
  execp->a_text   = bfd_h_getlong (abfd, bytes->a_text);
  execp->a_data   = bfd_h_getlong (abfd, bytes->a_data);
  execp->a_bss    = bfd_h_getlong (abfd, bytes->a_bss);
  execp->a_syms   = bfd_h_getlong (abfd, bytes->a_syms);
  execp->a_entry  = bfd_h_getlong (abfd, bytes->a_entry);
  execp->a_trsize = bfd_h_getlong (abfd, bytes->a_trsize);
  execp->a_drsize = bfd_h_getlong (abfd, bytes->a_drsize);
}

void
DEFUN(bfd_aout_swap_exec_header_out,(abfd, execp, raw_bytes),
     bfd *abfd AND
     struct exec *execp AND 
     unsigned char *raw_bytes)
{
  struct exec_bytes *bytes = (struct exec_bytes *)raw_bytes;

  /* Now fill in fields in the raw data, from the fields in the exec struct. */
  bfd_h_putlong (abfd, execp->a_info  , bytes->a_info);
  bfd_h_putlong (abfd, execp->a_text  , bytes->a_text);
  bfd_h_putlong (abfd, execp->a_data  , bytes->a_data);
  bfd_h_putlong (abfd, execp->a_bss   , bytes->a_bss);
  bfd_h_putlong (abfd, execp->a_syms  , bytes->a_syms);
  bfd_h_putlong (abfd, execp->a_entry , bytes->a_entry);
  bfd_h_putlong (abfd, execp->a_trsize, bytes->a_trsize);
  bfd_h_putlong (abfd, execp->a_drsize, bytes->a_drsize);
}

/* Some A.OUT variant thinks that the file whose format we're checking
   is an a.out file.  Do some more checking, and set up for access if
   it really is.  Call back to the calling environment's "finish up"
   function just before returning, to handle any last-minute setup.  */
 
bfd_target *
some_aout_object_p (abfd, callback_to_real_object_p)
     bfd *abfd;
     bfd_target *(*callback_to_real_object_p) ();
{
  unsigned char exec_bytes[EXEC_BYTES_SIZE];	/* Raw bytes of exec hdr */
  struct exec *execp;
  PTR rawptr;

  if (bfd_seek (abfd, 0L, false) < 0) {
    bfd_error = system_call_error;
    return 0;
  }

  if (bfd_read ((PTR) exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
      != EXEC_BYTES_SIZE) {
    bfd_error = wrong_format;
    return 0;
  }

  /* Use an intermediate variable for clarity */
  rawptr = (PTR) bfd_zalloc (abfd, sizeof (struct aoutdata) + sizeof (struct exec));

  if (rawptr == NULL) {
    bfd_error = no_memory;
    return 0;
  }

  set_tdata (abfd, ((struct aoutdata *) rawptr));
  exec_hdr (abfd) = execp =
    (struct exec *) ((char *)rawptr + sizeof (struct aoutdata));

  bfd_aout_swap_exec_header_in (abfd, exec_bytes, execp);

  /* Set the file flags */
  abfd->flags = NO_FLAGS;
  if (execp->a_drsize || execp->a_trsize)
    abfd->flags |= HAS_RELOC;
  if (execp->a_entry) 
    abfd->flags |= EXEC_P;
  if (execp->a_syms) 
    abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;

  if (N_MAGIC (*execp) == ZMAGIC) abfd->flags |= D_PAGED;
  if (N_MAGIC (*execp) == NMAGIC) abfd->flags |= WP_TEXT;

  bfd_get_start_address (abfd) = execp->a_entry;

  obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
  bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct nlist);

  /* Set the default architecture and machine type.  These can be
     overridden in the callback routine.  */
  abfd->obj_arch = bfd_arch_unknown;
  abfd->obj_machine = 0;

  /* The default relocation entry size is that of traditional V7 Unix.  */
  obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;

  /* create the sections.  This is raunchy, but bfd_close wants to reclaim
     them */
  obj_textsec (abfd) = (asection *)NULL;
  obj_datasec (abfd) = (asection *)NULL;
  obj_bsssec (abfd) = (asection *)NULL;
  (void)bfd_make_section(abfd, ".text");
  (void)bfd_make_section(abfd, ".data");
  (void)bfd_make_section(abfd, ".bss");

  abfd->sections = obj_textsec (abfd);
  obj_textsec (abfd)->next = obj_datasec (abfd);
  obj_datasec (abfd)->next = obj_bsssec (abfd);

  obj_datasec (abfd)->size = execp->a_data;
  obj_bsssec (abfd)->size = execp->a_bss;
  obj_textsec (abfd)->size = execp->a_text;

  if (abfd->flags & D_PAGED) {
    obj_textsec (abfd)->size -=  EXEC_BYTES_SIZE;
  }
    

  obj_textsec (abfd)->flags = (execp->a_trsize != 0 ?
                               (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_HAS_CONTENTS) :
                               (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS));
  obj_datasec (abfd)->flags = (execp->a_drsize != 0 ?
                               (SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_HAS_CONTENTS) :
                               (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS));
  obj_bsssec (abfd)->flags = SEC_ALLOC;

#ifdef THIS_IS_ONLY_DOCUMENTATION
  /* Call back to the format-dependent code to fill in the rest of the 
     fields and do any further cleanup.  Things that should be filled
     in by the callback:  */

        struct exec *execp = exec_hdr (abfd);

	/* The virtual memory addresses of the sections */
	obj_datasec (abfd)->vma = N_DATADDR(*execp);
	obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
	obj_textsec (abfd)->vma = N_TXTADDR(*execp);

	/* The file offsets of the sections */
	obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
	obj_datasec (abfd)->filepos = N_DATOFF(*execp);

	/* The file offsets of the relocation info */
	obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
	obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);

	/* The file offsets of the string table and symbol table.  */
	obj_str_filepos (abfd) = N_STROFF (*execp);
	obj_sym_filepos (abfd) = N_SYMOFF (*execp);

     /* This common code can't fill in those things because they depend
     on either the start address of the text segment, the rounding
     up of virtual addersses between segments, or the starting file 
     position of the text segment -- all of which varies among different
     versions of a.out.  */

	/* Determine the architecture and machine type of the object file.  */
	switch (N_MACHTYPE (*exec_hdr (abfd))) {
	default:
	      abfd->obj_arch = bfd_arch_obscure;
	      break;
	}

	/* Determine the size of a relocation entry */
	switch (abfd->obj_arch) {
	case bfd_arch_sparc:
	case bfd_arch_a29k:
	  obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
	default:
	  obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
	}

	return abfd->xvec;

     /* The architecture is encoded in various ways in various a.out variants,
     or is not encoded at all in some of them.  The relocation size depends
     on the architecture and the a.out variant.  Finally, the return value
     is the bfd_target vector in use.  If an error occurs, return zero and
     set bfd_error to the appropriate error code.

     Formats such as b.out, which have additional fields in the a.out
     header, should cope with them in this callback as well.  */
#endif /* DOCUMENTATION */


  return (*callback_to_real_object_p)(abfd);
}


boolean
aout_mkobject (abfd)
     bfd *abfd;
{
  char *rawptr;

  bfd_error = system_call_error;

  /* Use an intermediate variable for clarity */
  rawptr = bfd_zalloc (abfd, sizeof (struct aoutdata) + sizeof (struct exec));

  if (rawptr == NULL) {
    bfd_error = no_memory;
    return false;
  }

  set_tdata (abfd, (struct aoutdata *) rawptr);
  exec_hdr (abfd) = (struct exec *) (rawptr + sizeof (struct aoutdata));

  /* For simplicity's sake we just make all the sections right here. */

  obj_textsec (abfd) = (asection *)NULL;
  obj_datasec (abfd) = (asection *)NULL;
  obj_bsssec (abfd) = (asection *)NULL;
  bfd_make_section (abfd, ".text");
  bfd_make_section (abfd, ".data");
  bfd_make_section (abfd, ".bss");

  return true;
}

/* Keep track of machine architecture and machine type for a.out's.
   Return the machine_type for a particular arch&machine, or M_UNKNOWN
   if that exact arch&machine can't be represented in a.out format.

   If the architecture is understood, machine type 0 (default) should
   always be understood.  */

enum machine_type
aout_machine_type (arch, machine)
     enum bfd_architecture arch;
     unsigned long machine;
{
  enum machine_type arch_flags;

  arch_flags = M_UNKNOWN;

  switch (arch) {
  case bfd_arch_sparc:
    if (machine == 0)	arch_flags = M_SPARC;
    break;

  case bfd_arch_m68k:
    switch (machine) {
    case 0:		arch_flags = M_68010; break;
    case 68000:		arch_flags = M_UNKNOWN;	break;
    case 68010:		arch_flags = M_68010; break;
    case 68020:		arch_flags = M_68020; break;
    default:		arch_flags = M_UNKNOWN; break;
    }
    break;

  case bfd_arch_i386:
    if (machine == 0)	arch_flags = M_386;
    break;

  case bfd_arch_a29k:
    if (machine == 0)	arch_flags = M_29K;
    break;

  default:
    arch_flags = M_UNKNOWN;
    break;
  }
  return arch_flags;
}

boolean
aout_set_arch_mach (abfd, arch, machine)
     bfd *abfd;
     enum bfd_architecture arch;
     unsigned long machine;
{
  abfd->obj_arch = arch;
  abfd->obj_machine = machine;
  if (arch != bfd_arch_unknown &&
      aout_machine_type (arch, machine) == M_UNKNOWN)
    return false;		/* We can't represent this type */
  return true;			/* We're easy ... */
}
\f
/* exec and core file sections */

boolean
aout_new_section_hook (abfd, newsect)
     bfd *abfd;
     asection *newsect;
{
  /* align to double at least */
  newsect->alignment_power = 3;

  if (bfd_get_format (abfd) == bfd_object) {
    if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
      obj_textsec(abfd)= newsect;
      return true;
    }

    if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
      obj_datasec(abfd) = newsect;
      return true;
    }

    if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
      obj_bsssec(abfd) = newsect;
      return true;
    }
  }

  /* We allow more than three sections internally */
  return true;
}

boolean
aout_set_section_contents (abfd, section, location, offset, count)
     bfd *abfd;
     sec_ptr section;
     PTR location;
     file_ptr offset;
      int count;
{
  if (abfd->output_has_begun == false)
      {				/* set by bfd.c handler */
	if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL)) 
	    {
	      bfd_error = invalid_operation;
	      return false;
	    }

	obj_textsec(abfd)->filepos = sizeof(struct exec);
	obj_textsec(abfd)->size = align_power(obj_textsec(abfd)->size,
					      obj_textsec(abfd)->alignment_power);
	obj_datasec(abfd)->filepos =  obj_textsec (abfd)->size + EXEC_BYTES_SIZE;
	obj_datasec(abfd)->size = align_power(obj_datasec(abfd)->size,
					      obj_datasec(abfd)->alignment_power);


      }
  /* regardless, once we know what we're doing, we might as well get going */
  if (section != obj_bsssec(abfd)) 
      {
	bfd_seek (abfd, section->filepos + offset, SEEK_SET);

	if (count) {
	  return (bfd_write ((PTR)location, 1, count, abfd) == count) ?
	    true : false;
	}
	return false;
      }
  return true;
}
\f
/* Classify stabs symbols */

#define sym_in_text_section(sym) \
     (((sym)->n_type  & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_TEXT)

#define sym_in_data_section(sym) \
     (((sym)->n_type  & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_DATA)

#define sym_in_bss_section(sym) \
     (((sym)->n_type  & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_BSS)

/* Symbol is undefined if type is N_UNDF|N_EXT and if it has
   zero in the "value" field.  Nonzeroes there are fortrancommon
   symbols.  */
#define sym_is_undefined(sym) \
        ((sym)->n_type == (N_UNDF | N_EXT) && (sym)->n_value == 0)

/* Symbol is a global definition if N_EXT is on and if it has
   a nonzero type field.  */
#define sym_is_global_defn(sym) \
        (((sym)->n_type & N_EXT) && (sym)->n_type & N_TYPE)

/* Symbol is debugger info if any bits outside N_TYPE or N_EXT
   are on.  */
#define sym_is_debugger_info(sym) \
        ((sym)->n_type & ~(N_EXT | N_TYPE))

#define sym_is_fortrancommon(sym)       \
        (((sym)->n_type == (N_EXT)) && (sym)->n_value != 0)

/* Symbol is absolute if it has N_ABS set */
#define sym_is_absolute(sym) \
 	       (((sym)->n_type  & N_TYPE)== N_ABS)


#define sym_is_indirect(sym) \
	       (((sym)->n_type  & N_ABS)== N_ABS)

/* Only in their own functions for ease of debugging; when sym flags have
   stabilised these should be inlined into their (single) caller */

static void
translate_from_native_sym_flags (sym_pointer, cache_ptr, abfd)
     struct nlist *sym_pointer;
     aout_symbol_type *cache_ptr;
     bfd *abfd;
{
  switch (cache_ptr->type & N_TYPE) {
  case N_SETA:
  case N_SETT:
  case N_SETD:
  case N_SETB:
    {
      asection *section = bfd_make_section(abfd,
					   cache_ptr->symbol.name);
      arelent_chain *reloc = (arelent_chain *)bfd_alloc(abfd, sizeof(arelent_chain));

      switch ( (cache_ptr->type  & N_TYPE) ) {
      case N_SETA:
	reloc->relent.section =  (asection *)NULL;
	cache_ptr->symbol.section = (asection *)NULL;
	break;
      case N_SETT:
	reloc->relent.section = (asection *)obj_textsec(abfd);
	cache_ptr->symbol.value -= reloc->relent.section->vma;
	break;
      case N_SETD:
	reloc->relent.section = (asection *)obj_datasec(abfd);
	cache_ptr->symbol.value -= reloc->relent.section->vma;
	break;
      case N_SETB:
	reloc->relent.section = (asection *)obj_bsssec(abfd);
	cache_ptr->symbol.value -= reloc->relent.section->vma;
	break;
      }
      cache_ptr->symbol.section = reloc->relent.section;
      reloc->relent.addend = cache_ptr->symbol.value ;

      /* We modify the symbol to belong to a section depending upon the
	 name of the symbol - probably __CTOR__ or __DTOR__ but we don't
	 really care, and add to the size of the section to contain a
	 pointer to the symbol. Build a reloc entry to relocate to this
	 symbol attached to this section.  */

      section->flags = SEC_CONSTRUCTOR;
      section->reloc_count++;
      section->alignment_power = 2;
      reloc->relent.sym_ptr_ptr = (asymbol **)NULL;
      reloc->next = section->constructor_chain;
      section->constructor_chain = reloc;
      reloc->relent.address = section->size;
      section->size += sizeof(int *);

      reloc->relent.howto = howto_table_ext +CTOR_TABLE_RELOC_IDX;
      cache_ptr->symbol.flags |=  BSF_DEBUGGING ;
      }
    break;
  default:

    if (sym_is_debugger_info (sym_pointer)) {
      cache_ptr->symbol.flags = BSF_DEBUGGING ;
      /* Work out the section correct for this symbol */
      switch (sym_pointer->n_type & N_TYPE) 
	{
	case N_TEXT:
	case N_FN:
	  cache_ptr->symbol.section = obj_textsec (abfd);
	  cache_ptr->symbol.value -= obj_textsec(abfd)->vma;
	  break;
	case N_DATA:
	  cache_ptr->symbol.value  -= obj_datasec(abfd)->vma;
	  cache_ptr->symbol.section = obj_datasec (abfd);
	  break;
	case N_BSS :
	  cache_ptr->symbol.section = obj_bsssec (abfd);
	  cache_ptr->symbol.value -= obj_bsssec(abfd)->vma;
	  break;
	case N_ABS:
	default:
	  cache_ptr->symbol.section = 0;
	  break;
	}
    }
    else {
      if (sym_is_fortrancommon (sym_pointer))
	{
	  cache_ptr->symbol.flags = BSF_FORT_COMM;
	  cache_ptr->symbol.section = (asection *)NULL;
	}
      else {
	if (sym_is_undefined (sym_pointer)) {
	  cache_ptr->symbol.flags = BSF_UNDEFINED;
	}
	else if (sym_is_global_defn (sym_pointer)) {
	  cache_ptr->symbol.flags = BSF_GLOBAL | BSF_EXPORT;
	}

	else if (sym_is_absolute (sym_pointer)) {
	  cache_ptr->symbol.flags = BSF_ABSOLUTE;
	}
	else {
	  cache_ptr->symbol.flags = BSF_LOCAL;
	}

	/* In a.out, the value of a symbol is always relative to the 
	 * start of the file, if this is a data symbol we'll subtract
	 * the size of the text section to get the section relative
	 * value. If this is a bss symbol (which would be strange)
	 * we'll subtract the size of the previous two sections
	 * to find the section relative address.
	 */

	if (sym_in_text_section (sym_pointer))   {
	  cache_ptr->symbol.value -= obj_textsec(abfd)->vma;
	  cache_ptr->symbol.section = obj_textsec (abfd);
	}
	else if (sym_in_data_section (sym_pointer)){
	  cache_ptr->symbol.value -= obj_datasec(abfd)->vma;
	  cache_ptr->symbol.section = obj_datasec (abfd);
	}
	else if (sym_in_bss_section(sym_pointer)) {
	  cache_ptr->symbol.section = obj_bsssec (abfd);
	  cache_ptr->symbol.value -= obj_bsssec(abfd)->vma;
	}
	else {
	  cache_ptr->symbol.section = (asection *)NULL;
	  cache_ptr->symbol.flags |= BSF_ABSOLUTE;
	}
      }
    }
  }
}

void
translate_to_native_sym_flags (sym_pointer, cache_ptr_g, abfd)
     struct nlist *sym_pointer;
     PTR cache_ptr_g;
     bfd *abfd;
{
  asymbol *cache_ptr = (asymbol *)cache_ptr_g;

  /* FIXME check for writing bss */
  if (bfd_get_section(cache_ptr)) {
    if (bfd_get_output_section(cache_ptr) == obj_bsssec (abfd)) {
      sym_pointer->n_type |= N_BSS;
    }
    else if (bfd_get_output_section(cache_ptr) == obj_datasec (abfd)) {
      sym_pointer->n_type |= N_DATA;
    }
    else  if (bfd_get_output_section(cache_ptr) == obj_textsec (abfd)) {
      sym_pointer->n_type |= N_TEXT;
    }
    else {
      bfd_error_vector.nonrepresentable_section(abfd,
				 bfd_get_output_section(cache_ptr)->name);
    }
    /* Turn the symbol from section relative to absolute again */
    sym_pointer->n_value +=
      cache_ptr->section->output_section->vma 
	+ cache_ptr->section->output_offset ;
  }
  else {
    sym_pointer->n_type |= N_ABS;
  }

  if (cache_ptr->flags & (BSF_FORT_COMM | BSF_UNDEFINED)) {
    sym_pointer->n_type = (N_UNDF | N_EXT);
    return;
  }

  if (cache_ptr->flags & BSF_ABSOLUTE) {
    sym_pointer->n_type |= N_ABS;
  }

  if (cache_ptr->flags & (BSF_GLOBAL | BSF_EXPORT)) {
    sym_pointer->n_type |= N_EXT;
  }
  if (cache_ptr->flags & BSF_DEBUGGING) {
    sym_pointer->n_type = ((aout_symbol_type *)cache_ptr)->type;
  }
}
\f
/* Native-level interface to symbols. */

/* We read the symbols into a buffer, which is discarded when this
   function exits.  We read the strings into a buffer large enough to
   hold them all plus all the cached symbol entries. */

asymbol *
aout_make_empty_symbol (abfd)
bfd *abfd;
{
  aout_symbol_type  *new =
    (aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
  new->symbol.the_bfd = abfd;

  return &new->symbol;
}

boolean
DEFUN(aout_slurp_symbol_table, (abfd),
      bfd *abfd)
{
  size_t symbol_size;
  size_t string_size;
  unsigned char string_chars[LONG_SIZE];
  struct nlist *syms;
  char *strings;
  aout_symbol_type *cached;

  /* If there's no work to be done, don't do any */
  if (obj_aout_symbols (abfd) != (aout_symbol_type *)NULL) return true;
  symbol_size = exec_hdr(abfd)->a_syms;
  if (symbol_size == 0) {
    bfd_error = no_symbols;
    return false;
  }

  bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET);
  if (bfd_read ((PTR)string_chars, LONG_SIZE, 1, abfd) != LONG_SIZE)
    return false;
  string_size = bfd_h_getlong (abfd, string_chars);

  strings = bfd_alloc(abfd, string_size + 1);
  cached = (aout_symbol_type *)
	   bfd_zalloc(abfd, bfd_get_symcount (abfd) * sizeof(aout_symbol_type));
  /* Alloc this last, so we can free it if obstack is in use.  */
  syms = (struct nlist *) bfd_alloc(abfd, symbol_size);

  bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET);
  if (bfd_read ((PTR)syms, 1, symbol_size, abfd) != symbol_size) {
  bailout:
    if (syms) 	bfd_release (abfd, syms);
    if (cached)	bfd_release (abfd, cached);
    if (strings)bfd_release (abfd, strings);
    return false;
  }

  bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET);
  if (bfd_read ((PTR)strings, 1, string_size, abfd) != string_size) {
    goto bailout;
  }

  /* OK, now walk the new symtable, cacheing symbol properties */
    {
      register struct nlist *sym_pointer;
      register struct nlist *sym_end = syms + bfd_get_symcount (abfd);
      register aout_symbol_type *cache_ptr = cached;

      /* run through the table and byte swap if needed */
      for (sym_pointer = syms; sym_pointer < sym_end;  sym_pointer++) {
        sym_pointer->n_un.n_strx =
	  bfd_h_getlong (abfd, &sym_pointer->n_un.n_strx);
        sym_pointer->n_desc =
	  bfd_h_getshort (abfd, &sym_pointer->n_desc);
        sym_pointer->n_value =
	  bfd_h_getlong (abfd, &sym_pointer->n_value);
	sym_pointer->n_other = (char)
	  bfd_h_getchar(abfd, &sym_pointer->n_other);
	sym_pointer->n_type = (char)
	  bfd_h_getchar(abfd, &sym_pointer->n_type);
      }

      /* Run through table and copy values */
      for (sym_pointer = syms, cache_ptr = cached;
	   sym_pointer < sym_end; sym_pointer++, cache_ptr++) 
	  {
	    cache_ptr->symbol.the_bfd = abfd;
	    if (sym_pointer->n_un.n_strx)
	      cache_ptr->symbol.name = sym_pointer->n_un.n_strx + strings;
	    else
	      cache_ptr->symbol.name = (char *)NULL;
	    cache_ptr->symbol.value = sym_pointer->n_value;
	    cache_ptr->desc = sym_pointer->n_desc;
	    cache_ptr->other = sym_pointer->n_other;
	    cache_ptr->type = sym_pointer->n_type;
	    cache_ptr->symbol.udata = 0;
	    translate_from_native_sym_flags (sym_pointer, cache_ptr, abfd);

	  }
    }

  obj_aout_symbols (abfd) =  cached;
  bfd_release (abfd, (PTR)syms);

  return true;
}


void
DEFUN(aout_write_syms,(abfd),
     bfd *abfd)
{
  unsigned int count ;
  asymbol **generic = bfd_get_outsymbols (abfd);

  unsigned int stindex = sizeof(stindex); /* initial string length */

  for (count = 0; count < bfd_get_symcount (abfd); count++) {
    asymbol *g = generic[count];
    struct nlist nsp;

    if (g->name) {
      unsigned int length = strlen(g->name) +1;
      bfd_h_putlong  (abfd, stindex, (unsigned char *)&nsp.n_un.n_strx);
      stindex += length;
    }
    else {
      bfd_h_putlong  (abfd, 0, (unsigned char *)&nsp.n_un.n_strx);
    }

    if (g->the_bfd->xvec->flavour == abfd->xvec->flavour) 
      {
	nsp.n_desc = aout_symbol( g)->desc;
	nsp.n_other = aout_symbol(g)->other;
	nsp.n_type = aout_symbol(g)->type;
      }
    else
      {
	nsp.n_desc = 0;
	nsp.n_other = 0;
	nsp.n_type = 0;
      }


    nsp.n_value = g->value;
    translate_to_native_sym_flags (&nsp, (PTR)g, abfd);


    bfd_h_putshort (abfd, nsp.n_desc, (unsigned char *)&nsp.n_desc);
    bfd_h_putlong  (abfd, nsp.n_value, (unsigned char *)&nsp.n_value);
    bfd_write((PTR)&nsp,1, sizeof(nsp), abfd);
  }


  /* Now output the strings.  Be sure to put string length into correct
   * byte ordering before writing it.
   */
  bfd_h_putlong  (abfd, stindex, (unsigned char *)&stindex);

  bfd_write((PTR)&stindex, 1, sizeof(stindex), abfd);
  
  generic = bfd_get_outsymbols(abfd);
  for (count = 0; count < bfd_get_symcount(abfd); count++) 
    {
      asymbol *g = *(generic++);

      if (g->name)
	{
	  size_t length = strlen(g->name)+1;
	  bfd_write((PTR)g->name, 1, length, abfd);
	}
      if ((g->flags & BSF_FAKE)==0) {
	g->name = itos(count);	/* smash the generic symbol */
      }
    }
}


void
DEFUN(aout_reclaim_symbol_table,(abfd),
     bfd *abfd)
{

}
\f
unsigned int
aout_get_symtab_upper_bound (abfd)
     bfd *abfd;
{
  if (!aout_slurp_symbol_table (abfd)) return 0;

  return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
}

unsigned int
aout_get_symtab (abfd, location)
     bfd *abfd;
     asymbol **location;
{
  unsigned int counter = 0;
  aout_symbol_type *symbase;

  if (!aout_slurp_symbol_table (abfd)) return 0;

  for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
    *(location++) = (asymbol *)( symbase++);
  *location++ =0;
  return bfd_get_symcount(abfd);
}

\f
/* Standard reloc stuff */
/* Output standard relocation information to a file in target byte order. */

void
swap_std_reloc_out (abfd, g, natptr)
     bfd *abfd;
     arelent *g;		/* Generic relocation struct */
     struct reloc_std_bytes *natptr;
{
  int r_index;
  int r_extern;
  unsigned int r_length;
  int r_pcrel;
  int r_baserel, r_jmptable, r_relative;
  unsigned int r_addend;

  bfd_h_putlong (abfd, g->address, natptr->r_address);

  r_length = g->howto->size ; /* Size as a power of two */
  r_pcrel  = (int) g->howto->pc_relative;	/* Relative to PC? */
  /* r_baserel, r_jmptable, r_relative???  FIXME-soon */
  r_baserel = 0;
  r_jmptable = 0;
  r_relative = 0;

  r_addend = g->addend;	/* Start here, see how it goes */

  /* name was clobbered by aout_write_syms to be symbol index */

  if (g->sym_ptr_ptr != NULL) 
    {
      if ((*(g->sym_ptr_ptr))->section) {
	/* put the section offset into the addend for output */
	r_addend += (*(g->sym_ptr_ptr))->section->vma;
      }

      r_index = stoi((*(g->sym_ptr_ptr))->name);
      r_extern = 1;
    }
  else {
    r_extern = 0;
    if (g->section == NULL) {
      /* It is possible to have a reloc with nothing, we generate an
	 abs + 0 */
      r_addend = 0;
      r_index = N_ABS | N_EXT;
    }
    else  if(g->section->output_section == obj_textsec(abfd)) {
      r_index = N_TEXT | N_EXT;
      r_addend += g->section->output_section->vma;
    }
    else if (g->section->output_section == obj_datasec(abfd)) {
      r_index = N_DATA | N_EXT;
      r_addend += g->section->output_section->vma;
    }
    else if (g->section->output_section == obj_bsssec(abfd)) {
      r_index = N_BSS | N_EXT ;
      r_addend += g->section->output_section->vma;
    }
    else {
      BFD_ASSERT(0);
    }
  }

  /* now the fun stuff */
  if (abfd->xvec->header_byteorder_big_p != false) {
    natptr->r_index[0] = r_index >> 16;
    natptr->r_index[1] = r_index >> 8;
    natptr->r_index[2] = r_index;
    natptr->r_bits[0] =
      (r_extern?    RELOC_STD_BITS_EXTERN_BIG: 0)
	| (r_pcrel?     RELOC_STD_BITS_PCREL_BIG: 0)
	  | (r_baserel?   RELOC_STD_BITS_BASEREL_BIG: 0)
	    | (r_jmptable?  RELOC_STD_BITS_JMPTABLE_BIG: 0)
	      | (r_relative?  RELOC_STD_BITS_RELATIVE_BIG: 0)
		| (r_length <<  RELOC_STD_BITS_LENGTH_SH_BIG);
  } else {
    natptr->r_index[2] = r_index >> 16;
    natptr->r_index[1] = r_index >> 8;
    natptr->r_index[0] = r_index;
    natptr->r_bits[0] =
      (r_extern?    RELOC_STD_BITS_EXTERN_LITTLE: 0)
	| (r_pcrel?     RELOC_STD_BITS_PCREL_LITTLE: 0)
	  | (r_baserel?   RELOC_STD_BITS_BASEREL_LITTLE: 0)
	    | (r_jmptable?  RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
	      | (r_relative?  RELOC_STD_BITS_RELATIVE_LITTLE: 0)
		| (r_length <<  RELOC_STD_BITS_LENGTH_SH_LITTLE);
  }
}


/* Extended stuff */
/* Output extended relocation information to a file in target byte order. */

void
swap_ext_reloc_out (abfd, g, natptr)
     bfd *abfd;
     arelent *g;		/* Generic relocation struct */
     register struct reloc_ext_bytes *natptr;
{
  int r_index;
  int r_extern;
  unsigned int r_type;
  unsigned int r_addend;

  bfd_h_putlong (abfd, g->address, natptr->r_address);

  /* Find a type in the output format which matches the input howto - 
     at the moment we assume input format == output format FIXME!! */
  r_type = (enum reloc_type) g->howto->type;

  r_addend = g->addend;	/* Start here, see how it goes */

  /* name was clobbered by aout_write_syms to be symbol index*/

  if (g->sym_ptr_ptr != NULL) 
    {
      if ((*(g->sym_ptr_ptr))->section) {
	/* put the section offset into the addend for output */
	r_addend += (*(g->sym_ptr_ptr))->section->vma;
      }

      r_index = stoi((*(g->sym_ptr_ptr))->name);
      r_extern = 1;
    }
  else {
    r_extern = 0;
    if (g->section == NULL) {
      BFD_ASSERT(0);
      r_index = N_ABS | N_EXT;
    }
    else  if(g->section->output_section == obj_textsec(abfd)) {
      r_index = N_TEXT | N_EXT;
      r_addend += g->section->output_section->vma;
    }
    else if (g->section->output_section == obj_datasec(abfd)) {
      r_index = N_DATA | N_EXT;
      r_addend += g->section->output_section->vma;
    }
    else if (g->section->output_section == obj_bsssec(abfd)) {
      r_index = N_BSS | N_EXT ;
      r_addend += g->section->output_section->vma;
    }
    else {
      BFD_ASSERT(0);
    }
  }

  /* now the fun stuff */
  if (abfd->xvec->header_byteorder_big_p != false) {
    natptr->r_index[0] = r_index >> 16;
    natptr->r_index[1] = r_index >> 8;
    natptr->r_index[2] = r_index;
    natptr->r_bits[0] =
      (r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
	| (r_type << RELOC_EXT_BITS_TYPE_SH_BIG);
  } else {
    natptr->r_index[2] = r_index >> 16;
    natptr->r_index[1] = r_index >> 8;
    natptr->r_index[0] = r_index;
    natptr->r_bits[0] =
      (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
	| (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
  }

  bfd_h_putlong (abfd, r_addend, natptr->r_addend);
}

#define MOVE_ADDRESS(ad)       						\
  if (r_extern) {							\
    cache_ptr->sym_ptr_ptr = symbols + r_index;				\
    cache_ptr->section = (asection *)NULL;				\
      cache_ptr->addend = ad;						\
  } else {								\
    cache_ptr->sym_ptr_ptr = (asymbol **)NULL;				\
    switch (r_index) {							\
    case N_TEXT:							\
    case N_TEXT | N_EXT:						\
      cache_ptr->section = obj_textsec(abfd);				\
      cache_ptr->addend = ad  - su->textsec->vma;			\
      break;								\
    case N_DATA:							\
    case N_DATA | N_EXT:						\
      cache_ptr->section = obj_datasec(abfd);				\
      cache_ptr->addend = ad - su->datasec->vma;			\
      break;								\
    case N_BSS:								\
    case N_BSS | N_EXT:							\
      cache_ptr->section = obj_bsssec(abfd);				\
      cache_ptr->addend = ad - su->bsssec->vma;				\
      break;								\
    case N_ABS:								\
    case N_ABS | N_EXT:							\
      cache_ptr->section = NULL;	/* No section */		\
      cache_ptr->addend = ad;		/* FIXME, is this right? */	\
      BFD_ASSERT(1);							\
      break;								\
    default:								\
      cache_ptr->section = NULL;	/* No section */		\
      cache_ptr->addend = ad;		/* FIXME, is this right? */	\
      BFD_ASSERT(1);							\
      break;								\
    }									\
  }     								\

void
swap_ext_reloc_in (abfd, bytes, cache_ptr, symbols)
     bfd *abfd;
     struct reloc_ext_bytes *bytes;
     arelent *cache_ptr;
     asymbol **symbols;
{
  int r_index;
  int r_extern;
  unsigned int r_type;
  struct aoutdata *su = (struct aoutdata *)(abfd->tdata);

  cache_ptr->address = bfd_h_getlong (abfd, bytes->r_address);

  /* now the fun stuff */
  if (abfd->xvec->header_byteorder_big_p != false) {
    r_index =  (bytes->r_index[0] << 16)
	     | (bytes->r_index[1] << 8)
	     |  bytes->r_index[2];
    r_extern = (0 != (bytes->r_bits[0] & RELOC_EXT_BITS_EXTERN_BIG));
    r_type   =       (bytes->r_bits[0] & RELOC_EXT_BITS_TYPE_BIG)
				      >> RELOC_EXT_BITS_TYPE_SH_BIG;
  } else {
    r_index =  (bytes->r_index[2] << 16)
	     | (bytes->r_index[1] << 8)
	     |  bytes->r_index[0];
    r_extern = (0 != (bytes->r_bits[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
    r_type   =       (bytes->r_bits[0] & RELOC_EXT_BITS_TYPE_LITTLE)
				      >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
  }

  cache_ptr->howto =  howto_table_ext + r_type;
  MOVE_ADDRESS(bfd_h_getlong(abfd,bytes->r_addend));
}

void
swap_std_reloc_in (abfd, bytes, cache_ptr, symbols)
     bfd *abfd;
     struct reloc_std_bytes *bytes;
     arelent *cache_ptr;
     asymbol **symbols;
{
  int r_index;
  int r_extern;
  unsigned int r_length;
  int r_pcrel;
  int r_baserel, r_jmptable, r_relative;
  struct aoutdata *su = (struct aoutdata *)(abfd->tdata);

  cache_ptr->address = bfd_h_getlong (abfd, bytes->r_address);

  /* now the fun stuff */
  if (abfd->xvec->header_byteorder_big_p != false) {
    r_index =  (bytes->r_index[0] << 16)
      | (bytes->r_index[1] << 8)
	|  bytes->r_index[2];
    r_extern  = (0 != (bytes->r_bits[0] & RELOC_STD_BITS_EXTERN_BIG));
    r_pcrel   = (0 != (bytes->r_bits[0] & RELOC_STD_BITS_PCREL_BIG));
    r_baserel = (0 != (bytes->r_bits[0] & RELOC_STD_BITS_BASEREL_BIG));
    r_jmptable= (0 != (bytes->r_bits[0] & RELOC_STD_BITS_JMPTABLE_BIG));
    r_relative= (0 != (bytes->r_bits[0] & RELOC_STD_BITS_RELATIVE_BIG));
    r_length  =       (bytes->r_bits[0] & RELOC_STD_BITS_LENGTH_BIG) 
      			>> RELOC_STD_BITS_LENGTH_SH_BIG;
  } else {
    r_index =  (bytes->r_index[2] << 16)
      | (bytes->r_index[1] << 8)
	|  bytes->r_index[0];
    r_extern  = (0 != (bytes->r_bits[0] & RELOC_STD_BITS_EXTERN_LITTLE));
    r_pcrel   = (0 != (bytes->r_bits[0] & RELOC_STD_BITS_PCREL_LITTLE));
    r_baserel = (0 != (bytes->r_bits[0] & RELOC_STD_BITS_BASEREL_LITTLE));
    r_jmptable= (0 != (bytes->r_bits[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
    r_relative= (0 != (bytes->r_bits[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
    r_length  =       (bytes->r_bits[0] & RELOC_STD_BITS_LENGTH_LITTLE) 
      			>> RELOC_STD_BITS_LENGTH_SH_LITTLE;
  }

  cache_ptr->howto =  howto_table_std + r_length + 4 * r_pcrel;
  /* FIXME-soon:  Roll baserel, jmptable, relative bits into howto setting */

  MOVE_ADDRESS(0);
}

/* Reloc hackery */

boolean
aout_slurp_reloc_table (abfd, asect, symbols)
     bfd *abfd;
     sec_ptr asect;
     asymbol **symbols;
{
  unsigned int count;
  size_t reloc_size;
  PTR relocs;
  arelent *reloc_cache;
  size_t each_size;

  if (asect->relocation) return true;

  if (asect->flags & SEC_CONSTRUCTOR) return true;

  if (asect == obj_datasec (abfd)) {
    reloc_size = exec_hdr(abfd)->a_drsize;
    goto doit;
  }

  if (asect == obj_textsec (abfd)) {
    reloc_size = exec_hdr(abfd)->a_trsize;
    goto doit;
  }

  bfd_error = invalid_operation;
  return false;

 doit:
  bfd_seek (abfd, asect->rel_filepos, SEEK_SET);
  each_size = obj_reloc_entry_size (abfd);

  count = reloc_size / each_size;


  reloc_cache = (arelent *) bfd_zalloc (abfd, (size_t)(count * sizeof
						       (arelent)));
  if (!reloc_cache) {
nomem:
    bfd_error = no_memory;
    return false;
  }

  relocs =  bfd_alloc (abfd, reloc_size);
  if (!relocs) {
    bfd_release (abfd, reloc_cache);
    goto nomem;
  }

  if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size) {
    bfd_release (abfd, relocs);
    bfd_release (abfd, reloc_cache);
    bfd_error = system_call_error;
    return false;
  }

  if (each_size == RELOC_EXT_SIZE) {
    register struct reloc_ext_bytes *rptr = (struct reloc_ext_bytes *) relocs;
    unsigned int counter = 0;
    arelent *cache_ptr = reloc_cache;

    for (; counter < count; counter++, rptr++, cache_ptr++) {
      swap_ext_reloc_in(abfd, rptr, cache_ptr, symbols);
    }
  } else {
    register struct reloc_std_bytes *rptr = (struct reloc_std_bytes *) relocs;
    unsigned int counter = 0;
    arelent *cache_ptr = reloc_cache;

    for (; counter < count; counter++, rptr++, cache_ptr++) {
	swap_std_reloc_in(abfd, rptr, cache_ptr, symbols);
    }

  }

  bfd_release (abfd,relocs);
  asect->relocation = reloc_cache;
  asect->reloc_count = count;
  return true;
}



/* Write out a relocation section into an object file.  */

boolean
aout_squirt_out_relocs (abfd, section)
     bfd *abfd;
     asection *section;
{
  arelent **generic;
  unsigned char *native, *natptr;
  size_t each_size;

  unsigned int count = section->reloc_count;
  size_t natsize;

  if (count == 0) return true;

  each_size = obj_reloc_entry_size (abfd);
  natsize = each_size * count;
  native = (unsigned char *) bfd_zalloc (abfd, natsize);
  if (!native) {
    bfd_error = no_memory;
    return false;
  }

  generic = section->orelocation;

  if (each_size == RELOC_EXT_SIZE) 
    {
      for (natptr = native;
	   count != 0;
	   --count, natptr += each_size, ++generic)
	swap_ext_reloc_out (abfd, *generic, (struct reloc_ext_bytes *)natptr);
    }
  else 
    {
      for (natptr = native;
	   count != 0;
	   --count, natptr += each_size, ++generic)
	swap_std_reloc_out(abfd, *generic, (struct reloc_std_bytes *)natptr);
    }

  if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
    bfd_release(abfd, native);
    return false;
  }
  bfd_release (abfd, native);

  return true;
}

/* This is stupid.  This function should be a boolean predicate */
unsigned int
aout_canonicalize_reloc (abfd, section, relptr, symbols)
     bfd *abfd;
     sec_ptr section;
     arelent **relptr;
     asymbol **symbols;
{
  arelent *tblptr = section->relocation;
  unsigned int count;

  if (!(tblptr || aout_slurp_reloc_table (abfd, section, symbols)))
    return 0;

  if (section->flags & SEC_CONSTRUCTOR) {
    arelent_chain *chain = section->constructor_chain;
    for (count = 0; count < section->reloc_count; count ++) {
      *relptr ++ = &chain->relent;
      chain = chain->next;
    }
  }
  else {
    tblptr = section->relocation;
    if (!tblptr) return 0;

    for (count = 0; count++ < section->reloc_count;) 
      {
	*relptr++ = tblptr++;
      }
  }
  *relptr = 0;

  return section->reloc_count;
}

unsigned int
aout_get_reloc_upper_bound (abfd, asect)
     bfd *abfd;
     sec_ptr asect;
{
  if (bfd_get_format (abfd) != bfd_object) {
    bfd_error = invalid_operation;
    return 0;
  }
  if (asect->flags & SEC_CONSTRUCTOR) {
    return (sizeof (arelent *) * (asect->reloc_count+1));
  }


  if (asect == obj_datasec (abfd))
    return (sizeof (arelent *) *
            ((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd))
             +1));

  if (asect == obj_textsec (abfd))
    return (sizeof (arelent *) *
            ((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd))
             +1));

  bfd_error = invalid_operation;
  return 0;
}

void
aout_reclaim_reloc (ignore_abfd, ignore)
     bfd *ignore_abfd;
     sec_ptr ignore;
{

}
\f

alent *
aout_get_lineno(ignore_abfd, ignore_symbol)
bfd *ignore_abfd;
asymbol *ignore_symbol;
{
return (alent *)NULL;
}

void 
aout_print_symbol(ignore_abfd, afile, symbol, how)
bfd *ignore_abfd;
PTR afile;
asymbol *symbol;
bfd_print_symbol_enum_type how;
{
  FILE *file = (FILE *)afile;

  switch (how) {
  case bfd_print_symbol_name_enum:
    fprintf(file,"%s", symbol->name);
    break;
  case bfd_print_symbol_type_enum:
    fprintf(file,"%4x %2x %2x",(unsigned)(aout_symbol(symbol)->desc & 0xffff),
	    (unsigned)(aout_symbol(symbol)->other & 0xff),
	    (unsigned)(aout_symbol(symbol)->type));
    break;
  case bfd_print_symbol_all_enum:
    {
   CONST char *section_name = symbol->section == (asection *)NULL ?
	"*abs" : symbol->section->name;

      bfd_print_symbol_vandf((PTR)file,symbol);

      fprintf(file," %-5s %04x %02x %02x %s",
	      section_name,
	      (unsigned)(aout_symbol(symbol)->desc & 0xffff),
	      (unsigned)(aout_symbol(symbol)->other & 0xff),
	      (unsigned)(aout_symbol(symbol)->type  & 0xff),
	      symbol->name);
    }
    break;
  }
}

/* 
 provided a bfd, a section and an offset into the section, calculate
 and return the name of the source file and the line nearest to the
 wanted location.
*/
 
boolean
DEFUN(aout_find_nearest_line,(abfd,
				section,
				symbols,
				offset,
				filename_ptr,
				functionname_ptr,
				line_ptr),
      bfd *abfd AND
      asection *section AND
      asymbol **symbols AND
      bfd_vma offset AND
      CONST char **filename_ptr AND
      CONST char **functionname_ptr AND
      unsigned int *line_ptr)
{
  /* Run down the file looking for the filename, function and linenumber */
  asymbol **p;
  static  char buffer[100];
  bfd_vma high_line_vma = ~0;
  bfd_vma low_func_vma = 0;
  asymbol *func = 0;
  *filename_ptr = abfd->filename;
  *functionname_ptr = 0;
  *line_ptr = 0;
  if (symbols != (asymbol **)NULL) {
    for (p = symbols; *p; p++) {
      aout_symbol_type  *q = (aout_symbol_type *)(*p);
      switch (q->type){
      case N_SO:
	*filename_ptr = q->symbol.name;
	if (obj_textsec(abfd) != section) {
	  return true;
	}
	break;
      case N_SLINE:

      case N_DSLINE:
      case N_BSLINE:
	/* We'll keep this if it resolves nearer than the one we have already */
	if (q->symbol.value >= offset &&
	    q->symbol.value < high_line_vma) {
	  *line_ptr = q->desc;
	  high_line_vma = q->symbol.value;
	}
	break;
      case N_FUN:
	{
	  /* We'll keep this if it is nearer than the one we have already */
	  if (q->symbol.value >= low_func_vma &&
	      q->symbol.value <= offset) {
	    low_func_vma = q->symbol.value;
	    func = (asymbol *)q;
	  }
	  if (*line_ptr && func) {
	    CONST char *function = func->name;
	    char *p;
	    strncpy(buffer, function, sizeof(buffer)-1);
	    buffer[sizeof(buffer)-1] = 0;
	    /* Have to remove : stuff */
	    p = strchr(buffer,':');
	    if (p != NULL) {*p = NULL; }
	    *functionname_ptr = buffer;
	    return true;

	  }
	}
	break;
      }
    }
  }
  
  return true;

}

int 
DEFUN(aout_sizeof_headers,(ignore_abfd),
      bfd *ignore_abfd)
{
  return 0;		/* FIXME, this is the wrong value! */
}