Mon Aug 19 13:48:22 1991 Roland H. Pesch (pesch at cygint.cygnus.com)

[deliverable/binutils-gdb.git] / bfd / aoutx.h

/* BFD semi-generic back-end for a.out binaries
   Copyright (C) 1990-1991 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 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

/*doc*
@section a.out backends

BFD supports a number of different flavours of a.out format, though
the major differences are only the sizes of the structures on disk,
and the shape of the relocation information. 

The support is split into a basic support file @code{aoutx.h} and
other files which derive functions from the base. One derivation file
is @code{aoutf1.h} (for a.out flavour 1), and adds to the basic a.out
functions support for sun3, sun4, 386 and 29k a.out files, to create a
target jump vector for a specific target.

This information is further split out into more specific files for each
machine, including @code{sunos.c} - for sun3 and sun4 and
@code{demo64} for a demonstration of a 64 bit a.out format.

The base file @code{aoutx.h} defines general mechanisms for reading
and writing records to and from disk, and various other methods which
BFD requires. It is included by @code{aout32.c} and @code{aout64.c} to
form the names aout_32_swap_exec_header_in,
aout_64_swap_exec_header_in, etc.

As an example, this is what goes on to make the back end for a sun4, from aout32.c

@example
   #define ARCH_SIZE 32
   #include "aoutx.h"
@end example

Which exports names:
@example
    ...
   aout_32_canonicalize_reloc
   aout_32_find_nearest_line
   aout_32_get_lineno
   aout_32_get_reloc_upper_bound
     ...
@end example

from sunos.c

@example   
    #define ARCH 32
    #define TARGET_NAME "a.out-sunos-big"
    #define VECNAME    sunos_big_vec
    #include "aoutf1.h"
@end example
requires all the names from aout32.c, and produces the jump vector

@example
    sunos_big_vec
@end example

*/

#define KEEPIT flags
#define KEEPITTYPE int

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

struct external_exec;
#include "libaout.h"
#include "libbfd.h"
#include "aout64.h"
#include "stab.gnu.h"
#include "ar.h"

void (*bfd_error_trap)();

/*doc*
@subsection relocations
The file @code{aoutx.h} caters for both the @emph{standard} and
@emph{extended} forms of a.out relocation records.

The standard records are characterised by containing only an address,
a symbol index and a type field. The extended records (used on 29ks
and sparcs) also have a full integer for an addend. 
*/
#define CTOR_TABLE_RELOC_IDX 2

/* start-sanitize-v9 */
/* Provided the symbol, returns the value reffed */
static  bfd_vma
DEFUN(get_symbol_value,(symbol, input_section),
      asymbol *symbol AND
      asection *input_section)
{                                             
  bfd_vma relocation = 0;

  if (symbol != (asymbol *)NULL) {              
    if (symbol->flags & BSF_FORT_COMM) {        
      relocation = 0;                           
    } else {                                      
      relocation = symbol->value;               
    }                                           
    if (symbol->section != (asection *)NULL) {    
      relocation += symbol->section->output_section->vma +
        symbol->section->output_offset;           
    }                                             
  }
  else {
    /* No symbol, so use the input section value */
    relocation = input_section->output_section->vma + input_section->output_offset;
  }
  return relocation;
}

static bfd_reloc_status_enum_type
DEFUN(reloc64,(abfd, reloc_entry, symbol_in, data, input_section),
      bfd *abfd AND
      arelent *reloc_entry AND
      asymbol *symbol_in AND
      unsigned char *data AND
      asection *input_section)
{
  bfd_vma sym_value = get_symbol_value(symbol_in, input_section);
  bfd_vma value = bfd_get_64(abfd, (bfd_byte *)data + reloc_entry->address);
  value += sym_value + reloc_entry->addend;
  bfd_put_64(abfd, value, (bfd_byte *)data+reloc_entry->address);
  return bfd_reloc_ok;
}

static bfd_reloc_status_enum_type
DEFUN(disp64,(abfd, reloc_entry, symbol_in, data, input_section),
      bfd *abfd AND
      arelent *reloc_entry AND
      asymbol *symbol_in AND
      unsigned char *data AND
      asection *input_section)
{
  bfd_vma sym_value = get_symbol_value(symbol_in, input_section);

/* bfd_get_64(abfd, (bfd_byte *)data + reloc_entry->address);*/
  bfd_vma value = 0;
  value += sym_value + reloc_entry->addend;

  /* Subtract from the calculated value the pc */
  value -= reloc_entry->address + input_section->output_section->vma;
  bfd_put_64(abfd, value, (bfd_byte *)data+reloc_entry->address);
  return bfd_reloc_ok;
}

static bfd_reloc_status_enum_type
DEFUN(hhi22,(abfd, reloc_entry, symbol_in, data, input_section),
      bfd *abfd AND
      arelent *reloc_entry AND
      asymbol *symbol_in AND
      unsigned char *data AND
      asection *input_section)
{
  bfd_vma sym_value = get_symbol_value(symbol_in, input_section);

  bfd_vma value =   bfd_get_32(abfd, (bfd_byte *)data + reloc_entry->address);

  value = (value & ~0x3fffff) | ( ((sym_value + reloc_entry->addend) >> 32+10) & 0x3fffff);

  bfd_put_32(abfd, value, (bfd_byte *)data+reloc_entry->address);
  return bfd_reloc_ok;
}

static bfd_reloc_status_enum_type
DEFUN(hlo10,(abfd, reloc_entry, symbol_in, data, input_section),
      bfd *abfd AND
      arelent *reloc_entry AND
      asymbol *symbol_in AND
      unsigned char *data AND
      asection *input_section)
{
  bfd_vma sym_value = get_symbol_value(symbol_in, input_section);

  bfd_vma value =   bfd_get_32(abfd, (bfd_byte *)data + reloc_entry->address);

  value = (value & ~0x3ff) | (((sym_value + reloc_entry->addend) >> 32) & 0x3ff);

  bfd_put_32(abfd, value, (bfd_byte *)data+reloc_entry->address);
  return bfd_reloc_ok;
}

static r64() 
{
  abort();
}

/* end-sanitize-v9 */

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),

/* start-sanitize-v9 */

  HOWTO(RELOC_11, 0,  2,        21, true,  0, false, true,r64,"11",     false, 0,/*0x00000000001fffff*/0, false),
  HOWTO(RELOC_WDISP2_14, 0, 2,  21, true,  0, false, true,r64,"DISP2_14",false, 0,/*0x00000000001fffff*/0, false),
  HOWTO(RELOC_WDISP19, 0,  3,   64, true,  0, false, true,r64,"DISP19", false, 0,/*0xffffffffffffffff*/0, false),  
  HOWTO(RELOC_HHI22,  42, 3,    22, false, 0, false, true,hhi22,"HHI22",false, 0,/*0x003fffff00000000*/0, false),
  HOWTO(RELOC_HLO10,  32, 3,    10, false, 0, false, true,hlo10,"HLO10", false, 0,/*0x000003ff00000000*/0, 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),


  HOWTO(RELOC_64,     0,  3,    64, false, 0, true,  true,reloc64,"64",     false, 0,/*0xffffffffffffffff*/0, false),
  HOWTO(RELOC_DISP64, 0,  3,    64, true,  0, false, true,disp64,"DISP64", false, 0,/*0xffffffffffffffff*/0, false),  
  HOWTO(RELOC_WDISP21,2,  2,    21, true,  0, false, true,r64,"WDISP21",false, 0,/*0x00000000001fffff*/0, false),
  HOWTO(RELOC_DISP21, 0,  2,    21, true,  0, false, true,r64,"DISP21", false, 0,/*0x00000000001fffff*/0, false),
  HOWTO(RELOC_DISP14, 0,  2,    14, true,  0, false, true,r64,"DISP21", false, 0,/*0x0000000000003fff*/0, false),

/* end-sanitize-v9 */
};

/* 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;

/*doc*
@subsection Internal Entry Points
@code{aoutx.h} exports several routines for accessing the contents of
an a.out file, which are gathered and exported in turn by various
format specific files (eg sunos.c).
*/

/*doc*
*i aout_<size>_swap_exec_header_in
Swaps the information in an executable header taken from a raw byte stream memory image,
into the internal exec_header structure.
*; PROTO(void, aout_<size>_swap_exec_header_in,
      (bfd *abfd,
      struct external_exec *raw_bytes,
      struct internal_exec *execp));
*/
         
void
DEFUN(NAME(aout,swap_exec_header_in),(abfd, raw_bytes, execp),
      bfd *abfd AND
      struct external_exec *raw_bytes AND
      struct internal_exec *execp)
{
  struct external_exec *bytes = (struct external_exec *)raw_bytes;

  /* Now fill in fields in the execp, from the bytes in the raw data.  */
  execp->a_info   = bfd_h_get_32 (abfd, bytes->e_info);
  execp->a_text   = GET_WORD (abfd, bytes->e_text);
  execp->a_data   = GET_WORD (abfd, bytes->e_data);
  execp->a_bss    = GET_WORD (abfd, bytes->e_bss);
  execp->a_syms   = GET_WORD (abfd, bytes->e_syms);
  execp->a_entry  = GET_WORD (abfd, bytes->e_entry);
  execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
  execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
}

/*doc*
*i aout_<size>_swap_exec_header_out
Swaps the information in an internal exec header structure into the
supplied buffer ready for writing to disk.
*; PROTO(void, aout_<size>_swap_exec_header_out,
          (bfd *abfd,
           struct internal_exec *execp,
           struct external_exec *raw_bytes));
*/
void
DEFUN(NAME(aout,swap_exec_header_out),(abfd, execp, raw_bytes),
     bfd *abfd AND
     struct internal_exec *execp AND 
     struct external_exec *raw_bytes)
{
  struct external_exec *bytes = (struct external_exec *)raw_bytes;

  /* Now fill in fields in the raw data, from the fields in the exec struct. */
  bfd_h_put_32 (abfd, execp->a_info  , bytes->e_info);
  PUT_WORD (abfd, execp->a_text  , bytes->e_text);
  PUT_WORD (abfd, execp->a_data  , bytes->e_data);
  PUT_WORD (abfd, execp->a_bss   , bytes->e_bss);
  PUT_WORD (abfd, execp->a_syms  , bytes->e_syms);
  PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
  PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
  PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
}

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


/*doc*
*i aout_<size>_some_aout_object_p

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 environments "finish up"
function just before returning, to handle any last-minute setup.  

*; PROTO(bfd_target *, aout_<size>_some_aout_object_p,
         (bfd *abfd,
          bfd_target *(*callback_to_real_object_p)()));
*/
 
bfd_target *
DEFUN(NAME(aout,some_aout_object_p),(abfd, callback_to_real_object_p),
      bfd *abfd AND
      bfd_target *(*callback_to_real_object_p) ())
{
  struct external_exec exec_bytes;
  struct internal_exec *execp;
  struct container *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 = (struct container *) bfd_zalloc (abfd, sizeof (struct container));

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

  set_tdata (abfd, rawptr);
  exec_hdr (abfd) = execp = &(rawptr->e);
  NAME(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 external_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);
}

/*doc*
*i aout_<size>_mkobject

This routine initializes a BFD for use with a.out files.

*; PROTO(boolean, aout_<size>_mkobject, (bfd *));
*/

boolean
DEFUN(NAME(aout,mkobject),(abfd),
     bfd *abfd)
{
  struct container *rawptr;

  bfd_error = system_call_error;

  /* Use an intermediate variable for clarity */
  rawptr = (struct container *)bfd_zalloc (abfd, sizeof (struct container));
  
  if (rawptr == NULL) {
    bfd_error = no_memory;
    return false;
  }
  
  set_tdata (abfd, rawptr);
  exec_hdr (abfd) = &(rawptr->e);
  
  /* 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;
}


/*doc*
*i aout_<size>_machine_type

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.  

*; PROTO(enum machine_type, aout_<size>_machine_type,
         (enum bfd_architecture arch,
          unsigned long machine));
*/

enum machine_type
DEFUN(NAME(aout,machine_type),(arch, machine),
      enum bfd_architecture arch AND
      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;
}

/*doc*
*i aout_<size>_set_arch_mach

Sets the architecture and the machine of the BFD to those values
supplied. Verifies that the format can support the architecture
required.

*; PROTO(boolean, aout_<size>_set_arch_mach,
         (bfd *,
          enum bfd_architecture,
          unsigned long machine));
*/

boolean
DEFUN(NAME(aout,set_arch_mach),(abfd, arch, machine),
      bfd *abfd AND
      enum bfd_architecture arch AND
      unsigned long machine)
{
  abfd->obj_arch = arch;
  abfd->obj_machine = machine;
  if (arch != bfd_arch_unknown &&
      NAME(aout,machine_type) (arch, machine) == M_UNKNOWN)
    return false;               /* We can't represent this type */
  return true;                  /* We're easy ... */
}

/*doc*
*i aout_<size>new_section_hook

Called by the BFD in response to a @code{bfd_make_section} request.
*; PROTO(boolean, aout_<size>_new_section_hook,
         (bfd *abfd,
          asection *newsect));
*/
boolean
DEFUN(NAME(aout,new_section_hook),(abfd, newsect),
      bfd *abfd AND
      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
DEFUN(NAME(aout,set_section_contents),(abfd, section, location, offset, count),
      bfd *abfd AND
      sec_ptr section AND
      PTR location AND
      file_ptr offset AND
      bfd_size_type 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;
            }
/*      if (abfd->flags & D_PAGED) {      
          obj_textsec(abfd)->filepos = 0;
        }
        else*/ {
          obj_textsec(abfd)->filepos = EXEC_BYTES_SIZE;
        }
        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)->type  & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_TEXT)

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

#define sym_in_bss_section(sym) \
(((sym)->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)->type == (N_UNDF | N_EXT) && (sym)->symbol.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)->type & N_EXT) && (sym)->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)->type & ~(N_EXT | N_TYPE))

#define sym_is_fortrancommon(sym)       \
(((sym)->type == (N_EXT)) && (sym)->symbol.value != 0)

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


#define sym_is_indirect(sym) \
(((sym)->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
DEFUN(translate_from_native_sym_flags,(sym_pointer, cache_ptr, abfd),
      struct external_nlist *sym_pointer AND
      aout_symbol_type *cache_ptr AND
      bfd *abfd)
  {
    switch (cache_ptr->type & N_TYPE) {
    case N_SETA:
    case N_SETT:
    case N_SETD:
    case N_SETB:
        {
          char *copy = bfd_alloc(abfd, strlen(cache_ptr->symbol.name)+1);
          asection *section ;
          arelent_chain *reloc = (arelent_chain *)bfd_alloc(abfd, sizeof(arelent_chain));
          strcpy(copy, cache_ptr->symbol.name);
          section = bfd_make_section(abfd,copy);
          switch ( (cache_ptr->type  & N_TYPE) ) {
          case N_SETA:
            section->flags = SEC_CONSTRUCTOR;
            reloc->relent.section =  (asection *)NULL;
            cache_ptr->symbol.section = (asection *)NULL;
            break;
          case N_SETT:
            section->flags = SEC_CONSTRUCTOR_TEXT;
            reloc->relent.section = (asection *)obj_textsec(abfd);
            cache_ptr->symbol.value -= reloc->relent.section->vma;
            break;
          case N_SETD:
            section->flags = SEC_CONSTRUCTOR_DATA;
            reloc->relent.section = (asection *)obj_datasec(abfd);
            cache_ptr->symbol.value -= reloc->relent.section->vma;
            break;
          case N_SETB:
            section->flags = SEC_CONSTRUCTOR_BSS;
            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->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  | BSF_CONSTRUCTOR;
        }
        break;
  default:
    if (cache_ptr->type ==  N_WARNING) 
        {
      /* This symbol is the text of a warning message, the next symbol
         is the symbol to associate the warning with */
      cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
      cache_ptr->symbol.value = (bfd_vma)((cache_ptr+1));
      /* We furgle with the next symbol in place. We don't want it to be undefined, we'll trample the type */
      (sym_pointer+1)->e_type[0] = 0xff;
      break;
    }
    if ((cache_ptr->type | N_EXT) == (N_INDR | N_EXT)) {
      /* Two symbols in a row for an INDR message. The first symbol
         contains the name we will match, the second symbol contains the
         name the first name is translated into. It is supplied to us
         undefined. This is good, since we want to pull in any files which
         define it */
      cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT;
      cache_ptr->symbol.value = (bfd_vma)((cache_ptr+1));
      break;
    }

      
    if (sym_is_debugger_info (cache_ptr)) {
      cache_ptr->symbol.flags = BSF_DEBUGGING ;
      /* Work out the section correct for this symbol */
      switch (cache_ptr->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 (cache_ptr))
          {
            cache_ptr->symbol.flags = BSF_FORT_COMM;
            cache_ptr->symbol.section = (asection *)NULL;
          }
      else {
        if (sym_is_undefined (cache_ptr)) {
          cache_ptr->symbol.flags = BSF_UNDEFINED;
        }
        else if (sym_is_global_defn (cache_ptr)) {
          cache_ptr->symbol.flags = BSF_GLOBAL | BSF_EXPORT;
        }
          
        else if (sym_is_absolute (cache_ptr)) {
          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 (cache_ptr))   {
          cache_ptr->symbol.value -= obj_textsec(abfd)->vma;
          cache_ptr->symbol.section = obj_textsec (abfd);
        }
        else if (sym_in_data_section (cache_ptr)){
          cache_ptr->symbol.value -= obj_datasec(abfd)->vma;
          cache_ptr->symbol.section = obj_datasec (abfd);
        }
        else if (sym_in_bss_section(cache_ptr)) {
          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;
        }
      }
    }
  }
}

static void
DEFUN(translate_to_native_sym_flags,(sym_pointer, cache_ptr, abfd),
     struct external_nlist *sym_pointer AND
     asymbol *cache_ptr AND
     bfd *abfd)
{
  bfd_vma value = cache_ptr->value;

  if (bfd_get_section(cache_ptr)) {
    if (bfd_get_output_section(cache_ptr) == obj_bsssec (abfd)) {
      sym_pointer->e_type[0] |= N_BSS;
    }
    else if (bfd_get_output_section(cache_ptr) == obj_datasec (abfd)) {
      sym_pointer->e_type[0] |= N_DATA;
    }
    else  if (bfd_get_output_section(cache_ptr) == obj_textsec (abfd)) {
      sym_pointer->e_type[0] |= 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 */
    
    value +=
      cache_ptr->section->output_section->vma 
        + cache_ptr->section->output_offset ;
  }
  else {
    sym_pointer->e_type[0] |= N_ABS;
  }
  if (cache_ptr->flags & (BSF_WARNING)) {
    (sym_pointer+1)->e_type[0] = 1;
  }  
  if (cache_ptr->flags & (BSF_FORT_COMM | BSF_UNDEFINED)) {
    sym_pointer->e_type[0] = (N_UNDF | N_EXT);
  }
  else {
    if (cache_ptr->flags & BSF_ABSOLUTE) {
      sym_pointer->e_type[0] |= N_ABS;
    }
    
    if (cache_ptr->flags & (BSF_GLOBAL | BSF_EXPORT)) {
      sym_pointer->e_type[0] |= N_EXT;
    }
    if (cache_ptr->flags & BSF_DEBUGGING) {
      sym_pointer->e_type [0]= ((aout_symbol_type *)cache_ptr)->type;
    }
  }
  PUT_WORD(abfd, value, sym_pointer->e_value);
}
\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 *
DEFUN(NAME(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(NAME(aout,slurp_symbol_table),(abfd),
      bfd *abfd)
  {
    bfd_size_type symbol_size;
    bfd_size_type string_size;
    unsigned char string_chars[BYTES_IN_WORD];
    struct external_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, BYTES_IN_WORD, 1, abfd) != BYTES_IN_WORD)
      return false;
    string_size = GET_WORD (abfd, string_chars);
    
    strings =(char *) bfd_alloc(abfd, string_size + 1);
    cached = (aout_symbol_type *)
      bfd_zalloc(abfd, (bfd_size_type)(bfd_get_symcount (abfd) * sizeof(aout_symbol_type)));

    /* malloc this, so we can free it if simply. The symbol caching
       might want to allocate onto the bfd's obstack  */
    syms = (struct external_nlist *) malloc(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)         free (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 external_nlist *sym_pointer;
        register struct external_nlist *sym_end = syms + bfd_get_symcount (abfd);
        register aout_symbol_type *cache_ptr = cached;
        
        /* Run through table and copy values */
        for (sym_pointer = syms, cache_ptr = cached;
             sym_pointer < sym_end; sym_pointer++, cache_ptr++) 
            {
              bfd_vma x = GET_WORD(abfd, sym_pointer->e_strx);
              cache_ptr->symbol.the_bfd = abfd;
              if (x)
                cache_ptr->symbol.name = x + strings;
              else
                cache_ptr->symbol.name = (char *)NULL;
              
              cache_ptr->symbol.value = GET_SWORD(abfd,  sym_pointer->e_value);
              cache_ptr->desc = bfd_get_16(abfd, sym_pointer->e_desc);
              cache_ptr->other =bfd_get_8(abfd, sym_pointer->e_other);
              cache_ptr->type = bfd_get_8(abfd,  sym_pointer->e_type);
              cache_ptr->symbol.udata = 0;
              translate_from_native_sym_flags (sym_pointer, cache_ptr, abfd);
            }
      }
    
    obj_aout_symbols (abfd) =  cached;
    free((PTR)syms);
    
    return true;
  }


void
DEFUN(NAME(aout,write_syms),(abfd),
      bfd *abfd)
  {
    unsigned int count ;
    asymbol **generic = bfd_get_outsymbols (abfd);
    
    bfd_size_type stindex = BYTES_IN_WORD; /* initial string length */
    
    for (count = 0; count < bfd_get_symcount (abfd); count++) {
      asymbol *g = generic[count];
      struct external_nlist nsp;
      
      
      if (g->name) {
        unsigned int length = strlen(g->name) +1;
        PUT_WORD  (abfd, stindex, (unsigned char *)nsp.e_strx);
        stindex += length;
      }
      else {
        PUT_WORD  (abfd, 0, (unsigned char *)nsp.e_strx);
      }
      
      if (g->the_bfd->xvec->flavour == abfd->xvec->flavour) 
          {
            bfd_h_put_16(abfd, aout_symbol(g)->desc,  nsp.e_desc);
            bfd_h_put_8(abfd, aout_symbol(g)->other,  nsp.e_other);
            bfd_h_put_8(abfd, aout_symbol(g)->type,  nsp.e_type);
          }
      else
          {
            bfd_h_put_16(abfd,0, nsp.e_desc);
            bfd_h_put_8(abfd, 0,  nsp.e_other);
            bfd_h_put_8(abfd, 0,  nsp.e_type);
          }
      
      
      
      translate_to_native_sym_flags (&nsp, (PTR)g, abfd);
      
      bfd_write((PTR)&nsp,1,EXTERNAL_LIST_SIZE, abfd);
    }
    
    
    /* Now output the strings.  Be sure to put string length into correct
      * byte ordering before writing it.
        */
      {
        char buffer[BYTES_IN_WORD];
        PUT_WORD  (abfd, stindex, (unsigned char *)buffer);
    
        bfd_write((PTR)buffer, 1, BYTES_IN_WORD, 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->KEEPIT = (KEEPITTYPE) count;
          }
        }
  }



unsigned int
DEFUN(NAME(aout,get_symtab),(abfd, location),
      bfd *abfd AND
      asymbol **location)
  {
    unsigned int counter = 0;
    aout_symbol_type *symbase;
    
    if (!NAME(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
DEFUN(NAME(aout,swap_std_reloc_out),(abfd, g, natptr),
      bfd *abfd AND
      arelent *g AND
      struct reloc_std_external *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;
    
    PUT_WORD(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 = ((*(g->sym_ptr_ptr))->KEEPIT);
          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_type[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_type[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
DEFUN(NAME(aout,swap_ext_reloc_out),(abfd, g, natptr),
      bfd *abfd AND
      arelent *g AND
      register struct reloc_ext_external *natptr)
  {
    int r_index;
    int r_extern;
    unsigned int r_type;
    unsigned int r_addend;
    
    PUT_WORD (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))->KEEPIT);
      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_type[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_type[0] =
      (r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
        | (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
  }

  PUT_WORD (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
DEFUN(NAME(aout,swap_ext_reloc_in), (abfd, bytes, cache_ptr, symbols),
      bfd *abfd AND
      struct reloc_ext_external *bytes AND
      arelent *cache_ptr AND
      asymbol **symbols)
{
  int r_index;
  int r_extern;
  unsigned int r_type;
  struct aoutdata *su = (struct aoutdata *)(abfd->tdata);

  cache_ptr->address = (GET_SWORD (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_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
    r_type   =       (bytes->r_type[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_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
    r_type   =       (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
                                      >> RELOC_EXT_BITS_TYPE_SH_LITTLE;
  }

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

void
DEFUN(NAME(aout,swap_std_reloc_in), (abfd, bytes, cache_ptr, symbols),
  bfd *abfd AND
  struct reloc_std_external *bytes AND
  arelent *cache_ptr AND
  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 = (int32_type)(bfd_h_get_32 (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_type[0] & RELOC_STD_BITS_EXTERN_BIG));
    r_pcrel   = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
    r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
    r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
    r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
    r_length  =       (bytes->r_type[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_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
    r_pcrel   = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
    r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
    r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
    r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
    r_length  =       (bytes->r_type[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
DEFUN(NAME(aout,slurp_reloc_table),(abfd, asect, symbols),
      bfd *abfd AND
      sec_ptr asect AND
      asymbol **symbols)
{
  unsigned int count;
  bfd_size_type 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 = (PTR) 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_external *rptr = (struct reloc_ext_external *) relocs;
    unsigned int counter = 0;
    arelent *cache_ptr = reloc_cache;

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

    for (; counter < count; counter++, rptr++, cache_ptr++) {
        NAME(aout,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
DEFUN(NAME(aout,squirt_out_relocs),(abfd, section),
      bfd *abfd AND
      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)
        NAME(aout,swap_ext_reloc_out) (abfd, *generic, (struct reloc_ext_external *)natptr);
    }
  else 
    {
      for (natptr = native;
           count != 0;
           --count, natptr += each_size, ++generic)
        NAME(aout,swap_std_reloc_out)(abfd, *generic, (struct reloc_std_external *)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
DEFUN(NAME(aout,canonicalize_reloc),(abfd, section, relptr, symbols),
      bfd *abfd AND
      sec_ptr section AND
      arelent **relptr AND
      asymbol **symbols)
{
  arelent *tblptr = section->relocation;
  unsigned int count;

  if (!(tblptr || NAME(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
DEFUN(NAME(aout,get_reloc_upper_bound),(abfd, asect),
     bfd *abfd AND
     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;
}

\f
 unsigned int
DEFUN(NAME(aout,get_symtab_upper_bound),(abfd),
     bfd *abfd)
{
  if (!NAME(aout,slurp_symbol_table)(abfd)) return 0;

  return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
}
 alent *
DEFUN(NAME(aout,get_lineno),(ignore_abfd, ignore_symbol),
      bfd *ignore_abfd AND
      asymbol *ignore_symbol)
{
return (alent *)NULL;
}


void 
DEFUN(NAME(aout,print_symbol),(ignore_abfd, afile, symbol, how),
      bfd *ignore_abfd AND
      PTR afile AND
      asymbol *symbol AND
      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(NAME(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(NAME(aout,sizeof_headers),(ignore_abfd, execable),
      bfd *ignore_abfd AND
      boolean execable)
{
  return EXEC_BYTES_SIZE;
}