* bout.c (bfd_reloc_status_type, callj_callback): Cast void*

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

/* BFD back-end for Intel 960 b.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.  */


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

#include "aout/stab_gnu.h"
#include "libaout.h"            /* BFD a.out internal data structures */


extern bfd_error_vector_type bfd_error_vector;
PROTO (static boolean, b_out_squirt_out_relocs,(bfd *abfd, asection *section));
PROTO (static bfd_target *, b_out_callback, (bfd *));

PROTO (boolean, aout_32_slurp_symbol_table, (bfd *abfd));
PROTO (void , aout_32_write_syms, ());

/* Swaps the information in an executable header taken from a raw byte
   stream memory image, into the internal exec_header structure.  */

PROTO(void, bout_swap_exec_header_in,
      (bfd *abfd,
      struct external_exec *raw_bytes,
      struct internal_exec *execp));
         
void
DEFUN(bout_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);
  execp->a_tload  = GET_WORD (abfd, bytes->e_tload);
  execp->a_dload  = GET_WORD (abfd, bytes->e_dload);
  execp->a_talign = bytes->e_talign[0];
  execp->a_dalign = bytes->e_dalign[0];
  execp->a_balign = bytes->e_balign[0];
  execp->a_relaxable = bytes->e_relaxable[0];
}

/* Swaps the information in an internal exec header structure into the
   supplied buffer ready for writing to disk.  */

PROTO(void, bout_swap_exec_header_out,
          (bfd *abfd,
           struct internal_exec *execp,
           struct external_exec *raw_bytes));
void
DEFUN(bout_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);
  PUT_WORD (abfd, execp->a_tload , bytes->e_tload);
  PUT_WORD (abfd, execp->a_dload , bytes->e_dload);
  bytes->e_talign[0] = execp->a_talign;
  bytes->e_dalign[0] = execp->a_dalign;
  bytes->e_balign[0] = execp->a_balign;
  bytes->e_relaxable[0] = execp->a_relaxable;
}


static bfd_target *
b_out_object_p (abfd)
     bfd *abfd;
{
  struct internal_exec anexec;
  struct external_exec exec_bytes;

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

  anexec.a_info = bfd_h_get_32 (abfd, exec_bytes.e_info);

  if (N_BADMAG (anexec)) {
    bfd_error = wrong_format;
    return 0;
  }

  bout_swap_exec_header_in (abfd, &exec_bytes, &anexec);
  return aout_32_some_aout_object_p (abfd, &anexec, b_out_callback);
}


/* Finish up the opening of a b.out file for reading.  Fill in all the
   fields that are not handled by common code.  */

static bfd_target *
b_out_callback (abfd)
     bfd *abfd;
{
  struct internal_exec *execp = exec_hdr (abfd);
  unsigned long bss_start;

  /* Architecture and machine type */
  bfd_set_arch_mach(abfd, 
                    bfd_arch_i960, /* B.out only used on i960 */
                    bfd_mach_i960_core /* Default */
                    );

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

  /* The alignments of the sections */
  obj_textsec (abfd)->alignment_power = execp->a_talign;
  obj_datasec (abfd)->alignment_power = execp->a_dalign;
  obj_bsssec  (abfd)->alignment_power = execp->a_balign;

  /* The starting addresses of the sections.  */
  obj_textsec (abfd)->vma = execp->a_tload;
  obj_datasec (abfd)->vma = execp->a_dload;

  /* And reload the sizes, since the aout module zaps them */
  obj_textsec (abfd)->_raw_size = execp->a_text;

  bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section */
  obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);

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

  /* The file positions of the relocation info */
  obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
  obj_datasec (abfd)->rel_filepos =  N_DROFF(*execp);

  adata(abfd).page_size = 1;    /* Not applicable. */
  adata(abfd).segment_size = 1; /* Not applicable. */
  adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;

  if (execp->a_relaxable)
   abfd->flags |= BFD_IS_RELAXABLE;
  return abfd->xvec;
}

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

static boolean
b_out_mkobject (abfd)
     bfd *abfd;
{
  struct bout_data_struct *rawptr;

  rawptr = (struct bout_data_struct *) bfd_zalloc (abfd, sizeof (struct bout_data_struct));
  if (rawptr == NULL) {
      bfd_error = no_memory;
      return false;
    }

  abfd->tdata.bout_data = 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;
}

static boolean
b_out_write_object_contents (abfd)
     bfd *abfd;
{
  struct external_exec swapped_hdr;

  exec_hdr (abfd)->a_info = BMAGIC;

  exec_hdr (abfd)->a_text = obj_textsec (abfd)->_raw_size;
  exec_hdr (abfd)->a_data = obj_datasec (abfd)->_raw_size;
  exec_hdr (abfd)->a_bss = obj_bsssec (abfd)->_raw_size;
  exec_hdr (abfd)->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
  exec_hdr (abfd)->a_entry = bfd_get_start_address (abfd);
  exec_hdr (abfd)->a_trsize = ((obj_textsec (abfd)->reloc_count) *
                               sizeof (struct relocation_info));
  exec_hdr (abfd)->a_drsize = ((obj_datasec (abfd)->reloc_count) *
                               sizeof (struct relocation_info));

  exec_hdr (abfd)->a_talign = obj_textsec (abfd)->alignment_power;
  exec_hdr (abfd)->a_dalign = obj_datasec (abfd)->alignment_power;
  exec_hdr (abfd)->a_balign = obj_bsssec (abfd)->alignment_power;

  exec_hdr (abfd)->a_tload = obj_textsec (abfd)->vma;
  exec_hdr (abfd)->a_dload = obj_datasec (abfd)->vma;

  bout_swap_exec_header_out (abfd, exec_hdr (abfd), &swapped_hdr);

  bfd_seek (abfd, 0L, SEEK_SET);
  bfd_write ((PTR) &swapped_hdr, 1, EXEC_BYTES_SIZE, abfd);

  /* Now write out reloc info, followed by syms and strings */
  if (bfd_get_symcount (abfd) != 0) 
    {
      bfd_seek (abfd,
                (long)(N_SYMOFF(*exec_hdr(abfd))), SEEK_SET);

      aout_32_write_syms (abfd);

      bfd_seek (abfd,   (long)(N_TROFF(*exec_hdr(abfd))), SEEK_SET);

      if (!b_out_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
      bfd_seek (abfd, (long)(N_DROFF(*exec_hdr(abfd))), SEEK_SET);

      if (!b_out_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
    }
  return true;
}
\f
/** Some reloc hackery */

#define CALLS    0x66003800     /* Template for 'calls' instruction     */
#define BAL      0x0b000000     /* Template for 'bal' instruction */
#define BALX     0x85000000     /* Template for 'balx' instruction      */
#define BAL_MASK 0x00ffffff
#define CALL     0x09000000
#define PCREL13_MASK 0x1fff
/* Magic to turn callx into calljx */
static bfd_reloc_status_type 
DEFUN (calljx_callback, (abfd, reloc_entry,  src, dst, input_section),
       bfd *abfd AND
       arelent *reloc_entry AND
       PTR src AND
       PTR dst AND

       asection *input_section)
{
  int  word = bfd_get_32(abfd, src);
  asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);
  aout_symbol_type  *symbol = aout_symbol(symbol_in);

  if (IS_CALLNAME(symbol->other)) 
  {

    aout_symbol_type *balsym = symbol+1;
    int inst = bfd_get_32(abfd, (bfd_byte *) src-4);
    /* The next symbol should be an N_BALNAME */
    BFD_ASSERT(IS_BALNAME(balsym->other));
    inst &= BAL_MASK;
    inst |= BALX;
    bfd_put_32(abfd, inst, (bfd_byte *) dst-4);
    symbol = balsym;
  }

    word += symbol->symbol.section->output_offset +
     symbol->symbol.section->output_section->vma +
      symbol->symbol.value + reloc_entry->addend;

  bfd_put_32(abfd, word, dst);
  return bfd_reloc_ok;
}


/* Magic to turn call into callj */
static bfd_reloc_status_type 
DEFUN (callj_callback, (abfd, reloc_entry,  data, srcidx,dstidx, input_section),
       bfd *abfd AND
       arelent *reloc_entry AND
       PTR data AND
       unsigned int srcidx AND
       unsigned int dstidx AND
       asection *input_section )
{
  int  word = bfd_get_32(abfd, (bfd_byte *) data + srcidx);
  asymbol *symbol_in = *(reloc_entry->sym_ptr_ptr);

  aout_symbol_type  *symbol = aout_symbol(symbol_in);

  if (IS_OTHER(symbol->other)) 
  {
    /* Call to a system procedure - replace code with system
       procedure number */
    word = CALLS | (symbol->other - 1);

  }

  else  if (IS_CALLNAME(symbol->other)) 
  {
    aout_symbol_type *balsym = symbol+1;
    /* The next symbol should be an N_BALNAME */
    BFD_ASSERT(IS_BALNAME(balsym->other));

    /* We are calling a leaf - so replace the call instruction
       with a bal */

    word = BAL |
     (((word & BAL_MASK) +
       balsym->symbol.section->output_offset +
       balsym->symbol.section->output_section->vma+
       balsym->symbol.value + reloc_entry->addend - dstidx -
       ( input_section->output_section->vma + input_section->output_offset))
      & BAL_MASK);


  }
  else 
  {

    word = CALL |
     (((word & BAL_MASK) + 
       symbol->symbol.section->output_offset +
       symbol->symbol.section->output_section->vma+
       symbol->symbol.value + reloc_entry->addend - dstidx -
       ( input_section->output_section->vma + input_section->output_offset))
      & BAL_MASK);
  }
  bfd_put_32(abfd, word, (bfd_byte *) data + dstidx);
  return bfd_reloc_ok;
}

/* type rshift size  bitsize    pcrel   bitpos  absolute overflow check*/

#define ABS32CODE 0
#define ABS32CODE_SHRUNK 1 
#define PCREL24 2
#define CALLJ 3
#define ABS32 4
#define PCREL13 5
#define ABS32_MAYBE_RELAXABLE 1
#define ABS32_WAS_RELAXABLE 2

static reloc_howto_type howto_reloc_callj =
HOWTO(CALLJ, 0, 2, 24, true, 0, true, true, 0,"callj", true, 0x00ffffff, 0x00ffffff,false);
static  reloc_howto_type howto_reloc_abs32 =
HOWTO(ABS32, 0, 2, 32, false, 0, true, true,0,"abs32", true, 0xffffffff,0xffffffff,false);
static reloc_howto_type howto_reloc_pcrel24 =
HOWTO(PCREL24, 0, 2, 24, true, 0, true, true,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);

static reloc_howto_type howto_reloc_pcrel13 =
HOWTO(PCREL13, 0, 2, 13, true, 0, true, true,0,"pcrel13", true, 0x00001fff,0x00001fff,false);


static reloc_howto_type howto_reloc_abs32codeshrunk = 
HOWTO(ABS32CODE_SHRUNK, 0, 2, 24, true, 0, true, true, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false);

static  reloc_howto_type howto_reloc_abs32code =
HOWTO(ABS32CODE, 0, 2, 32, false, 0, true, true,0,"callx", true, 0xffffffff,0xffffffff,false);

static reloc_howto_type *
b_out_reloc_type_lookup (abfd, code)
     bfd *abfd;
     bfd_reloc_code_real_type code;
{
  switch (code)
    {
    default:
      return 0;
    case BFD_RELOC_I960_CALLJ:
      return &howto_reloc_callj;
    case BFD_RELOC_32:
      return &howto_reloc_abs32;
    case BFD_RELOC_24_PCREL:
      return &howto_reloc_pcrel24;
    }
}

/* Allocate enough room for all the reloc entries, plus pointers to them all */

static boolean
b_out_slurp_reloc_table (abfd, asect, symbols)
     bfd *abfd;
     sec_ptr asect;
     asymbol **symbols;
{
  register struct relocation_info *rptr;
  unsigned int counter ;
  arelent *cache_ptr ;
  int extern_mask, pcrel_mask, callj_mask;
  int incode_mask;
  int size_mask;
  bfd_vma prev_addr = 0;
  unsigned int count;
  size_t  reloc_size;
  struct relocation_info *relocs;
  arelent *reloc_cache;

  if (asect->relocation) return true;
  if (!aout_32_slurp_symbol_table (abfd)) return false;

  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, (long)(asect->rel_filepos),  SEEK_SET);
  count = reloc_size / sizeof (struct relocation_info);

  relocs = (struct relocation_info *) bfd_xmalloc (reloc_size);
  if (!relocs) {
    bfd_error = no_memory;
    return false;
  }
  reloc_cache = (arelent *) bfd_xmalloc ((count+1) * sizeof (arelent));
  if (!reloc_cache) {
    free ((char*)relocs);
    bfd_error = no_memory;
    return false;
  }

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


  
  if (abfd->xvec->header_byteorder_big_p) {
    /* big-endian bit field allocation order */
    pcrel_mask  = 0x80;
    extern_mask = 0x10;
    incode_mask = 0x08;
    callj_mask  = 0x02;
    size_mask =   0x20;
  } else {
    /* little-endian bit field allocation order */
    pcrel_mask  = 0x01;
    extern_mask = 0x08;
    incode_mask = 0x10;
    callj_mask  = 0x40;
    size_mask   = 0x02;
  }

  for (rptr = relocs, cache_ptr = reloc_cache, counter = 0;
       counter < count;
       counter++, rptr++, cache_ptr++) 
  {
    unsigned char *raw = (unsigned char *)rptr;
    unsigned int symnum;
    cache_ptr->address = bfd_h_get_32 (abfd, raw + 0);
    if (abfd->xvec->header_byteorder_big_p) 
    {
      symnum = (raw[4] << 16) | (raw[5] << 8) | raw[6];
    } 
    else
    {
      symnum = (raw[6] << 16) | (raw[5] << 8) | raw[4];
    }

    if (raw[7] & extern_mask) 
    {
      /* if this is set then the r_index is a index into the symbol table;
       * if the bit is not set then r_index contains a section map.
       * we either fill in the sym entry with a pointer to the symbol,
       * or point to the correct section
       */
      cache_ptr->sym_ptr_ptr = symbols + symnum;
      cache_ptr->addend = 0;
    } else 
    {
      /* in a.out symbols are relative to the beginning of the
       * file rather than sections ?
       * (look in translate_from_native_sym_flags)
       * the reloc entry addend has added to it the offset into the
       * file of the data, so subtract the base to make the reloc
       * section relative */
      cache_ptr->sym_ptr_ptr = (asymbol **)NULL;
      switch (symnum) 
      {
       case N_TEXT:
       case N_TEXT | N_EXT:
        cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr;
        cache_ptr->addend = - obj_textsec(abfd)->vma;
        break;
       case N_DATA:
       case N_DATA | N_EXT:
        cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr;
        cache_ptr->addend = - obj_datasec(abfd)->vma;
        break;
       case N_BSS:
       case N_BSS | N_EXT:
        cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr;
        cache_ptr->addend =  - obj_bsssec(abfd)->vma;
        break;
       case N_ABS:
       case N_ABS | N_EXT:
        cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr;
        cache_ptr->addend = 0;
        break;
       default:
        BFD_ASSERT(0);
        break;
      }
        
    }

    /* the i960 only has a few relocation types:
       abs 32-bit and pcrel 24bit.   except for callj's!  */
    if (raw[7] & callj_mask)
    {
      cache_ptr->howto = &howto_reloc_callj;
    }
    else if ( raw[7] & pcrel_mask)
    {
      if (raw[7] & size_mask)
       cache_ptr->howto = &howto_reloc_pcrel13;
      else
       cache_ptr->howto = &howto_reloc_pcrel24;
    }
    else 
    {
      if (raw[7] & incode_mask) 
      {
        cache_ptr->howto = &howto_reloc_abs32code;
      }
      else 
      {
        cache_ptr->howto = &howto_reloc_abs32;
      }
    }
    if (cache_ptr->address < prev_addr) 
    {
      /* Ouch! this reloc is out of order, insert into the right place
       */
      arelent tmp;
      arelent *cursor = cache_ptr-1;
      unsigned int where = counter;
      bfd_vma stop = cache_ptr->address;
      tmp  = *cache_ptr;
      while (cursor->address > stop)
      {
        cursor[1] = cursor[0];
        cursor--;
      } 
      cursor[1] = tmp;
    }
    else 
    {
      prev_addr = cache_ptr->address;
    }
  }


  free (relocs);
  asect->relocation = reloc_cache;
  asect->reloc_count = count;


  return true;
}


static boolean
b_out_squirt_out_relocs (abfd, section)
     bfd *abfd;
     asection *section;
{

  arelent **generic;
  int r_extern;
  int r_idx;
  int r_addend;
  int incode_mask;  
  int len_1;
  unsigned int count = section->reloc_count;
  struct relocation_info *native, *natptr;
  size_t natsize = count * sizeof (struct relocation_info);
  int extern_mask, pcrel_mask,  len_2, callj_mask;
  int len1;
  if (count == 0) return true;
  generic   = section->orelocation;
  native = ((struct relocation_info *) bfd_xmalloc (natsize));
  if (!native) {
      bfd_error = no_memory;
      return false;
    }

  if (abfd->xvec->header_byteorder_big_p) 
  {
    /* Big-endian bit field allocation order */
    pcrel_mask  = 0x80;
    extern_mask = 0x10;
    len_2       = 0x40;
    len_1       = 0x20;
    callj_mask  = 0x02;
    incode_mask = 0x08;
  } 
else 
  {
    /* Little-endian bit field allocation order */
    pcrel_mask  = 0x01;
    extern_mask = 0x08;
    len_2       = 0x04;
    len_1       = 0x02;
    callj_mask  = 0x40;
    incode_mask = 0x10;
  }

  for (natptr = native; count > 0; --count, ++natptr, ++generic) 
  {
    arelent *g = *generic;
    unsigned char *raw = (unsigned char *)natptr;
    asymbol *sym = *(g->sym_ptr_ptr);
      
    asection *output_section = sym->section->output_section;
    bfd_h_put_32(abfd, g->address, raw);  
    /* Find a type in the output format which matches the input howto - 
     * at the moment we assume input format == output format FIXME!!
     */
    /* FIXME:  Need callj stuff here, and to check the howto entries to
       be sure they are real for this architecture.  */
    if (g->howto== &howto_reloc_callj) 
    {
      raw[7] = callj_mask + pcrel_mask + len_2;
    }
    else if (g->howto == &howto_reloc_pcrel24) 
    {
      raw[7] = pcrel_mask + len_2;
    }
    else if (g->howto == &howto_reloc_pcrel13) 
    {
      raw[7] = pcrel_mask + len_1;
    }
    else if (g->howto == &howto_reloc_abs32code) 
    {
      raw[7] = len_2 + incode_mask;
    }
    else {
        raw[7] = len_2;
      }
    if (output_section == &bfd_com_section 
        || output_section == &bfd_abs_section
        || output_section == &bfd_und_section) 
    {
      /* Fill in symbol */
      r_extern = 1;
      r_idx =  stoi((*(g->sym_ptr_ptr))->flags);
    }
    else 
    {
      /* Just an ordinary section */
      r_extern = 0;
      r_idx  = output_section->target_index;      
    }

    if (abfd->xvec->header_byteorder_big_p) {
        raw[4] = (unsigned char) (r_idx >> 16);
        raw[5] = (unsigned char) (r_idx >>  8);
        raw[6] = (unsigned char) (r_idx     );
      } else {
          raw[6] = (unsigned char) (r_idx >> 16);
          raw[5] = (unsigned char) (r_idx>>  8);
          raw[4] = (unsigned char) (r_idx     );
        }  
if (r_extern)
    raw[7] |= extern_mask; 
  }

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

  return true;
}

/* This is stupid.  This function should be a boolean predicate */
static unsigned int
b_out_canonicalize_reloc (abfd, section, relptr, symbols)
     bfd *abfd;
     sec_ptr section;
     arelent **relptr;
     asymbol **symbols;
{
  arelent *tblptr = section->relocation;
  unsigned int count = 0;

 if (!(tblptr || b_out_slurp_reloc_table (abfd, section, symbols))) return 0;
  tblptr = section->relocation;
 if (!tblptr) return 0;

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

  *relptr = 0;

  return section->reloc_count;
}

static unsigned int
b_out_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 == obj_datasec (abfd))
    return (sizeof (arelent *) *
            ((exec_hdr(abfd)->a_drsize / sizeof (struct relocation_info))
             +1));

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

  bfd_error = invalid_operation;
  return 0;
}
\f
static boolean
b_out_set_section_contents (abfd, section, location, offset, count)
     bfd *abfd;
     sec_ptr section;
     unsigned char *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) /*||
        (obj_textsec (abfd)->_cooked_size == 0) || (obj_datasec (abfd)->_cooked_size == 0)*/) {
      bfd_error = invalid_operation;
      return false;
    }

    obj_textsec (abfd)->filepos = sizeof(struct internal_exec);
    obj_datasec(abfd)->filepos = obj_textsec(abfd)->filepos 
                                 +  obj_textsec (abfd)->_raw_size;

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

  if (count != 0) {
    return (bfd_write ((PTR)location, 1, count, abfd) == count) ?true:false;
  }
  return true;
}

static boolean
b_out_set_arch_mach (abfd, arch, machine)
     bfd *abfd;
     enum bfd_architecture arch;
     unsigned long machine;
{
  bfd_default_set_arch_mach(abfd, arch, machine);

  if (arch == bfd_arch_unknown) /* Unknown machine arch is OK */
    return true;
  if (arch == bfd_arch_i960)    /* i960 default is OK */
    switch (machine) {
    case bfd_mach_i960_core:
    case bfd_mach_i960_kb_sb:
    case bfd_mach_i960_mc:
    case bfd_mach_i960_xa:
    case bfd_mach_i960_ca:
    case bfd_mach_i960_ka_sa:
    case 0:
      return true;
    default:
      return false;
    }

  return false;
}

static int 
DEFUN(b_out_sizeof_headers,(ignore_abfd, ignore),
      bfd *ignore_abfd AND
      boolean ignore)
{
  return sizeof(struct internal_exec);
}



/************************************************************************/
static bfd_vma 
DEFUN(get_value,(reloc, seclet),
      arelent  *reloc AND
      bfd_seclet_type *seclet)
{
  bfd_vma value;
  asymbol *symbol = *(reloc->sym_ptr_ptr);
  /* A symbol holds a pointer to a section, and an offset from the
     base of the section.  To relocate, we find where the section will
     live in the output and add that in */

  if (symbol->section == &bfd_und_section)
  {
    /* Ouch, this is an undefined symbol.. */
    bfd_error_vector.undefined_symbol(reloc, seclet);
    value = symbol->value;
  }
  else 
  {
    value = symbol->value +
     symbol->section->output_offset +
      symbol->section->output_section->vma;
  }
  
  
  /* Add the value contained in the relocation */
  value += (short)((reloc->addend) & 0xffff);
  
  return value;
}

static void
DEFUN(perform_slip,(s, slip, input_section, value),
      asymbol **s AND
      unsigned int slip AND
      asection *input_section AND
      bfd_vma value)
{
  
  /* Find all symbols past this point, and make them know
     what's happened */
  while (*s) 
  {
    asymbol *p = *s;
    if (p->section == input_section) 
    {
      /* This was pointing into this section, so mangle it */
      if (p->value > value)
      {
        p->value -=slip;
      }
    }
    s++;
        
  }    
}

/* This routine works out if the thing we want to get to can be
   reached with a 24bit offset instead of a 32 bit one.
   If it can, then it changes the amode */

static int 
DEFUN(abs32code,(input_section, symbols, r, shrink),
      asection *input_section AND
      asymbol **symbols AND
      arelent *r AND
      unsigned int shrink) 
{
  bfd_vma value = get_value(r,0);
        
        
  bfd_vma dot = input_section->output_section->vma +  input_section->output_offset + r->address;        
  bfd_vma gap;
  
  /* See if the address we're looking at within 2^23 bytes of where
     we are, if so then we can use a small branch rather than the
     jump we were going to */

  gap = value - (dot - shrink);
  

  if (-1<<23 < (long)gap && (long)gap < 1<<23 )
  { 

    /* Change the reloc type from 32bitcode possible 24, to 24bit
       possible 32 */

    r->howto = &howto_reloc_abs32codeshrunk;
    /* The place to relc moves back by four bytes */
    r->address -=4;
          
    /* This will be four bytes smaller in the long run */
    shrink += 4 ;
    perform_slip(symbols, 4, input_section, r->address-shrink +4);

          
  }      
  return shrink;      
}


static boolean 
DEFUN(b_out_relax_section,(abfd, i, symbols),
      bfd *abfd AND
      asection *i AND
      asymbol **symbols)
{
  
  /* Get enough memory to hold the stuff */
  bfd *input_bfd = i->owner;
  asection *input_section = i;
  int shrink = 0 ;
  boolean new = false;
  
  bfd_size_type reloc_size = bfd_get_reloc_upper_bound(input_bfd,
                                                       input_section);
  arelent **reloc_vector = (arelent **)alloca(reloc_size);

  /* Get the relocs and think about them */
  if (bfd_canonicalize_reloc(input_bfd, 
                             input_section,
                             reloc_vector,
                             symbols))
  {
    arelent **parent;
    for (parent = reloc_vector; *parent; parent++) 
    {
      arelent *r = *parent;
      switch (r->howto->type) {
       case ABS32CODE:
        /* A 32bit reloc in an addressing mode */
        shrink = abs32code(input_section, symbols, r,shrink);
        new=true;
        break;
       case ABS32CODE_SHRUNK:
        shrink+=4;
        break;
      }
    }
  }
  input_section->_cooked_size = input_section->_raw_size - shrink;  

  return new;
}

static bfd_byte *
DEFUN(b_out_get_relocated_section_contents,(in_abfd, seclet, data),
      bfd *in_abfd AND
      bfd_seclet_type *seclet AND
      bfd_byte *data)

{
  /* Get enough memory to hold the stuff */
  bfd *input_bfd = seclet->u.indirect.section->owner;
  asection *input_section = seclet->u.indirect.section;
  bfd_size_type reloc_size = bfd_get_reloc_upper_bound(input_bfd,
                                                       input_section);
  arelent **reloc_vector = (arelent **)alloca(reloc_size);
  
  /* read in the section */
  bfd_get_section_contents(input_bfd,
                           input_section,
                           data,
                           0,
                           input_section->_raw_size);
  
  
  if (bfd_canonicalize_reloc(input_bfd, 
                             input_section,
                             reloc_vector,
                             seclet->u.indirect.symbols) )
  {
    arelent **parent = reloc_vector;
    arelent *reloc ;
    


    unsigned int dst_address = 0;
    unsigned int src_address = 0;
    unsigned int run;
    unsigned int idx;
    
    /* Find how long a run we can do */
    while (dst_address < seclet->size) 
    {
      
      reloc = *parent;
      if (reloc) 
      {
        /* Note that the relaxing didn't tie up the addresses in the
           relocation, so we use the original address to work out the
           run of non-relocated data */
        run = reloc->address - src_address;
        parent++;
        
      }
      else 
      {
        run = seclet->size - dst_address;
      }
      /* Copy the bytes */
      for (idx = 0; idx < run; idx++)
      {
        data[dst_address++] = data[src_address++];
      }
    
      /* Now do the relocation */
    
      if (reloc) 
      {
        switch (reloc->howto->type) 
        {
         case ABS32CODE:
          calljx_callback(in_abfd, reloc, src_address + data, dst_address+data, input_section);
          src_address+=4;
          dst_address+=4;
          break;
         case ABS32:
          bfd_put_32(in_abfd, get_value(reloc, seclet), data+dst_address);
          src_address+=4;
          dst_address+=4;
          break;
         case CALLJ:
          callj_callback(in_abfd, reloc ,data,src_address,dst_address,input_section);
          src_address+=4;
          dst_address+=4;
          break;
         case ABS32CODE_SHRUNK: 
          /* This used to be a callx, but we've found out that a
             callj will reach, so do the right thing */
          callj_callback(in_abfd, reloc,data,src_address+4, dst_address,input_section);

          dst_address+=4;
          src_address+=8;
          break;
         case PCREL24:
         {
           long int word = bfd_get_32(in_abfd, data+src_address);
           asymbol *symbol = *(reloc->sym_ptr_ptr);
           word = (word & ~BAL_MASK) |
            (((word & BAL_MASK) +
              symbol->section->output_offset +
              symbol->section->output_section->vma+
              symbol->value + reloc->addend - dst_address -
              ( input_section->output_section->vma + input_section->output_offset))
             & BAL_MASK);

           bfd_put_32(in_abfd,word,  data+dst_address);
          dst_address+=4;
          src_address+=4;

         }
break;

         case PCREL13:
         {
           long int word = bfd_get_32(in_abfd, data+src_address);
           asymbol *symbol = *(reloc->sym_ptr_ptr);
           word = (word & ~PCREL13_MASK) |
            (((word & PCREL13_MASK) +
              symbol->section->output_offset +
              symbol->section->output_section->vma+
              symbol->value + reloc->addend - dst_address -
              ( input_section->output_section->vma + input_section->output_offset))
             & PCREL13_MASK);

           bfd_put_32(in_abfd,word,  data+dst_address);
          dst_address+=4;
          src_address+=4;

         }
break;

        default:

          abort();
        }
      }    
    }
  }
  return data;
}
/***********************************************************************/

/* Build the transfer vectors for Big and Little-Endian B.OUT files.  */

/* We don't have core files.  */
#define aout_32_core_file_failing_command _bfd_dummy_core_file_failing_command
#define aout_32_core_file_failing_signal _bfd_dummy_core_file_failing_signal
#define aout_32_core_file_matches_executable_p  \
                                _bfd_dummy_core_file_matches_executable_p

/* We use BSD-Unix generic archive files.  */
#define aout_32_openr_next_archived_file        bfd_generic_openr_next_archived_file
#define aout_32_generic_stat_arch_elt   bfd_generic_stat_arch_elt
#define aout_32_slurp_armap             bfd_slurp_bsd_armap
#define aout_32_slurp_extended_name_table       bfd_true
#define aout_32_write_armap             bsd_write_armap
#define aout_32_truncate_arname         bfd_bsd_truncate_arname

/* We override these routines from the usual a.out file routines.  */
#define aout_32_canonicalize_reloc      b_out_canonicalize_reloc
#define aout_32_get_reloc_upper_bound   b_out_get_reloc_upper_bound
#define aout_32_set_section_contents    b_out_set_section_contents
#define aout_32_set_arch_mach           b_out_set_arch_mach
#define aout_32_sizeof_headers          b_out_sizeof_headers

#define aout_32_bfd_debug_info_start            bfd_void
#define aout_32_bfd_debug_info_end              bfd_void
#define aout_32_bfd_debug_info_accumulate       (PROTO(void,(*),(bfd*, struct sec *))) bfd_void

#define aout_32_bfd_get_relocated_section_contents  b_out_get_relocated_section_contents
#define aout_32_bfd_relax_section                   b_out_relax_section

bfd_target b_out_vec_big_host =
{
  "b.out.big",                  /* name */
  bfd_target_aout_flavour,
  false,                        /* data byte order is little */
  true,                         /* hdr byte order is big */
  (HAS_RELOC | EXEC_P |         /* object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT ),
  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
  ' ',                          /* ar_pad_char */
  16,                           /* ar_max_namelen */
     2,                         /* minumum alignment power */

_do_getl64, _do_putl64,  _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
_do_getb64, _do_putb64,  _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
    {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
       bfd_generic_archive_p, _bfd_dummy_target},
    {bfd_false, b_out_mkobject, /* bfd_set_format */
       _bfd_generic_mkarchive, bfd_false},
    {bfd_false, b_out_write_object_contents,    /* bfd_write_contents */
       _bfd_write_archive_contents, bfd_false},

  JUMP_TABLE(aout_32),
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* COFF stuff?! */
  b_out_reloc_type_lookup,
};


bfd_target b_out_vec_little_host =
{
  "b.out.little",               /* name */
  bfd_target_aout_flavour,
  false,                        /* data byte order is little */
  false,                        /* header byte order is little */
  (HAS_RELOC | EXEC_P |         /* object flags */
   HAS_LINENO | HAS_DEBUG |
   HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT ),
  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
  ' ',                          /* ar_pad_char */
  16,                           /* ar_max_namelen */
     2,                         /* minum align */
_do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* data */
_do_getl64, _do_putl64, _do_getl32, _do_putl32, _do_getl16, _do_putl16, /* hdrs */
         
    {_bfd_dummy_target, b_out_object_p, /* bfd_check_format */
       bfd_generic_archive_p, _bfd_dummy_target},
    {bfd_false, b_out_mkobject, /* bfd_set_format */
       _bfd_generic_mkarchive, bfd_false},
    {bfd_false, b_out_write_object_contents,    /* bfd_write_contents */
       _bfd_write_archive_contents, bfd_false},
  JUMP_TABLE(aout_32),
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* COFF stuff?! */
  b_out_reloc_type_lookup,
};