binutils/srconv.c

/* srconv.c -- Sysroff conversion program
   Copyright (C) 1994-2021 Free Software Foundation, Inc.

   This file is part of GNU Binutils.

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

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

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

/* Written by Steve Chamberlain (sac@cygnus.com)

   This program can be used to convert a coff object file
   into a Hitachi OM/LM (Sysroff) format.

   All debugging information is preserved */

#include "sysdep.h"
#include "bfd.h"
#include "bucomm.h"
#include "sysroff.h"
#include "coffgrok.h"
#include "libiberty.h"
#include "filenames.h"
#include "getopt.h"

#include "coff/internal.h"
#include "../bfd/libcoff.h"

/*#define FOOP1 1 */

static int addrsize;
static char *toolname;
static char **rnames;

static void walk_tree_symbol
  (struct coff_sfile *, struct coff_section *, struct coff_symbol *, int);
static void walk_tree_scope
  (struct coff_section *, struct coff_sfile *, struct coff_scope *, int, int);
static int find_base (struct coff_sfile *, struct coff_section *);
static void wr_globals (struct coff_ofile *, struct coff_sfile *, int);

static FILE *file;
static bfd *abfd;
static int debug = 0;
static int quick = 0;
static int noprescan = 0;
static struct coff_ofile *tree;
/* Obsolete ??
   static int absolute_p;
 */

static int segmented_p;
static int code;

static int ids1[20000];
static int ids2[20000];

static int base1 = 0x18;
static int base2 = 0x2018;

static int
get_member_id (int x)
{
  if (ids2[x])
    return ids2[x];

  ids2[x] = base2++;
  return ids2[x];
}

static int
get_ordinary_id (int x)
{
  if (ids1[x])
    return ids1[x];

  ids1[x] = base1++;
  return ids1[x];
}
static char *
section_translate (char *n)
{
  if (strcmp (n, ".text") == 0)
    return "P";
  if (strcmp (n, ".data") == 0)
    return "D";
  if (strcmp (n, ".bss") == 0)
    return "B";
  return n;
}

#define DATE "940201073000";	/* Just a time on my birthday */

static char *
strip_suffix (const char *name)
{
  int i;
  char *res;

  for (i = 0; name[i] != 0 && name[i] != '.'; i++)
    ;
  res = (char *) xmalloc (i + 1);
  memcpy (res, name, i);
  res[i] = 0;
  return res;
}

/* IT LEN stuff CS */
static void
checksum (FILE *ffile, unsigned char *ptr, int size, int ccode)
{
  int j;
  int last;
  int sum = 0;
  int bytes = size / 8;

  last = !(ccode & 0xff00);
  if (size & 0x7)
    fatal (_("Checksum failure"));

  ptr[0] = ccode | (last ? 0x80 : 0);
  ptr[1] = bytes + 1;

  for (j = 0; j < bytes; j++)
    sum += ptr[j];

  /* Glue on a checksum too.  */
  ptr[bytes] = ~sum;
  if (fwrite (ptr, bytes + 1, 1, ffile) != 1)
    /* FIXME: Return error status.  */
    fatal (_("Failed to write checksum"));
}


static void
writeINT (int n, unsigned char *ptr, int *idx, int size, FILE *ffile)
{
  int byte = *idx / 8;

  if (size == -2)
    size = addrsize;
  else if (size == -1)
    size = 0;

  if (byte > 240)
    {
      /* Lets write out that record and do another one.  */
      checksum (ffile, ptr, *idx, code | 0x1000);
      *idx = 16;
      byte = *idx / 8;
    }

  switch (size)
    {
    case 0:
      break;
    case 1:
      ptr[byte] = n;
      break;
    case 2:
      ptr[byte + 0] = n >> 8;
      ptr[byte + 1] = n;
      break;
    case 4:
      ptr[byte + 0] = n >> 24;
      ptr[byte + 1] = n >> 16;
      ptr[byte + 2] = n >> 8;
      ptr[byte + 3] = n >> 0;
      break;
    default:
      fatal (_("Unsupported integer write size: %d"), size);
    }
  *idx += size * 8;
}

static void
writeBITS (int val, unsigned char *ptr, int *idx, int size)
{
  int byte = *idx / 8;
  int bit = *idx % 8;
  int old;

  *idx += size;

  old = ptr[byte];
  /* Turn off all about to change bits.  */
  old &= ~((~0 >> (8 - bit - size)) & ((1 << size) - 1));
  /* Turn on the bits we want.  */
  old |= (val & ((1 << size) - 1)) << (8 - bit - size);
  ptr[byte] = old;
}

static void
writeBARRAY (barray data, unsigned char *ptr, int *idx,
	     int size ATTRIBUTE_UNUSED, FILE *ffile)
{
  int i;

  writeINT (data.len, ptr, idx, 1, ffile);
  for (i = 0; i < data.len; i++)
    writeINT (data.data[i], ptr, idx, 1, ffile);
}

static void
writeCHARS (char *string, unsigned char *ptr, int *idx, int size, FILE *ffile)
{
  int i = *idx / 8;

  if (i > 240)
    {
      /* Lets write out that record and do another one.  */
      checksum (ffile, ptr, *idx, code | 0x1000);
      *idx = 16;
      i = *idx / 8;
    }

  if (size == 0)
    {
      /* Variable length string.  */
      size = strlen (string);
      ptr[i++] = size;
    }

  /* BUG WAITING TO HAPPEN.  */
  memcpy (ptr + i, string, size);
  i += size;
  *idx = i * 8;
}

#define SYSROFF_SWAP_OUT
#include "sysroff.c"

static char *rname_sh[] =
{
  "R0", "R1", "R2", "R3", "R4", "R5", "R6", "R7", "R8", "R9", "R10", "R11", "R12", "R13", "R14", "R15"
};

static char *rname_h8300[] =
{
  "ER0", "ER1", "ER2", "ER3", "ER4", "ER5", "ER6", "ER7", "PC", "CCR"
};

static void
wr_tr (void)
{
  /* The TR block is not normal - it doesn't have any contents.  */

  static char b[] =
    {
      0xff,			/* IT */
      0x03,			/* RL */
      0xfd,			/* CS */
    };

  if (fwrite (b, sizeof (b), 1, file) != 1)
    /* FIXME: Return error status.  */
    fatal (_("Failed to write TR block"));
}

static void
wr_un (struct coff_ofile *ptr, struct coff_sfile *sfile, int first,
       int nsecs ATTRIBUTE_UNUSED)
{
  struct IT_un un;
  struct coff_symbol *s;

  un.spare1 = 0;

  if (bfd_get_file_flags (abfd) & EXEC_P)
    un.format = FORMAT_LM;
  else
    un.format = FORMAT_OM;
  un.spare1 = 0;

  /* Don't count the abs section.  */
  un.nsections = ptr->nsections - 1;

  un.nextdefs = 0;
  un.nextrefs = 0;
  /* Count all the undefined and defined variables with global scope.  */

  if (first)
    {
      for (s = ptr->symbol_list_head; s; s = s->next_in_ofile_list)
	{
	  if (s->visible->type == coff_vis_ext_def
	      || s->visible->type == coff_vis_common)
	    un.nextdefs++;

	  if (s->visible->type == coff_vis_ext_ref)
	    un.nextrefs++;
	}
    }
  un.tool = toolname;
  un.tcd = DATE;
  un.linker = "L_GX00";
  un.lcd = DATE;
  un.name = sfile->name;
  sysroff_swap_un_out (file, &un);
}

static void
wr_hd (struct coff_ofile *p)
{
  struct IT_hd hd;

  hd.spare1 = 0;
  if (bfd_get_file_flags (abfd) & EXEC_P)
    hd.mt = MTYPE_ABS_LM;
  else
    hd.mt = MTYPE_OMS_OR_LMS;

  hd.cd = DATE;

  hd.nu = p->nsources;		/* Always one unit */
  hd.code = 0;			/* Always ASCII */
  hd.ver = "0200";		/* Version 2.00 */

  switch (bfd_get_arch (abfd))
    {
    case bfd_arch_h8300:
      hd.au = 8;
      hd.si = 0;
      hd.spcsz = 32;
      hd.segsz = 0;
      hd.segsh = 0;
      switch (bfd_get_mach (abfd))
	{
	case bfd_mach_h8300:
	  hd.cpu = "H8300";
	  hd.afl = 2;
	  addrsize = 2;
	  toolname = "C_H8/300";
	  break;
	case bfd_mach_h8300h:
	  hd.cpu = "H8300H";
	  hd.afl = 4;
	  addrsize = 4;
	  toolname = "C_H8/300H";
	  break;
	case bfd_mach_h8300s:
	  hd.cpu = "H8300S";
	  hd.afl = 4;
	  addrsize = 4;
	  toolname = "C_H8/300S";
	  break;
	default:
	  fatal (_("Unrecognized H8300 sub-architecture: %ld"),
		 bfd_get_mach (abfd));
	}
      rnames = rname_h8300;
      break;
    case bfd_arch_sh:
      hd.au = 8;
      hd.si = 0;
      hd.afl = 4;
      hd.spcsz = 32;
      hd.segsz = 0;
      hd.segsh = 0;
      hd.cpu = "SH";
      addrsize = 4;
      toolname = "C_SH";
      rnames = rname_sh;
      break;
    default:
      fatal (_("Unsupported architecture: %d"), bfd_get_arch (abfd));
    }

  if (! (bfd_get_file_flags(abfd) & EXEC_P))
    {
      hd.ep = 0;
    }
  else
    {
      hd.ep = 1;
      hd.uan = 0;
      hd.sa = 0;
      hd.sad = 0;
      hd.address = bfd_get_start_address (abfd);
    }

  hd.os = "";
  hd.sys = "";
  hd.mn = strip_suffix (bfd_get_filename (abfd));

  sysroff_swap_hd_out (file, &hd);
}


static void
wr_sh (struct coff_ofile *p ATTRIBUTE_UNUSED, struct coff_section *sec)
{
  struct IT_sh sh;
  sh.unit = 0;
  sh.section = sec->number;
#ifdef FOOP1
  sh.section = 0;
#endif
  sysroff_swap_sh_out (file, &sh);
}


static void
wr_ob (struct coff_ofile *p ATTRIBUTE_UNUSED, struct coff_section *section)
{
  bfd_size_type i;
  int first = 1;
  unsigned char stuff[200];

  i = 0;
  while (i < bfd_section_size (section->bfd_section))
    {
      struct IT_ob ob;
      int todo = 200;		/* Copy in 200 byte lumps.  */

      ob.spare = 0;
      if (i + todo > bfd_section_size (section->bfd_section))
	todo = bfd_section_size (section->bfd_section) - i;

      if (first)
	{
	  ob.saf = 1;
	  if (bfd_get_file_flags (abfd) & EXEC_P)
	    ob.address = section->address;
	  else
	    ob.address = 0;

	  first = 0;
	}
      else
	{
	  ob.saf = 0;
	}

      ob.cpf = 0;		/* Never compress.  */
      ob.data.len = todo;
      bfd_get_section_contents (abfd, section->bfd_section, stuff, i, todo);
      ob.data.data = stuff;
      sysroff_swap_ob_out (file, &ob /*, i + todo < section->size */ );
      i += todo;
    }

  /* Now fill the rest with blanks.  */
  while (i < (bfd_size_type) section->size)
    {
      struct IT_ob ob;
      int todo = 200;		/* Copy in 200 byte lumps.  */

      ob.spare = 0;
      if (i + todo > (bfd_size_type) section->size)
	todo = section->size - i;
      ob.saf = 0;

      ob.cpf = 0;		/* Never compress.  */
      ob.data.len = todo;
      memset (stuff, 0, todo);
      ob.data.data = stuff;
      sysroff_swap_ob_out (file, &ob);
      i += todo;
    }
  /* Now fill the rest with blanks.  */
}

static void
wr_rl (struct coff_ofile *ptr ATTRIBUTE_UNUSED, struct coff_section *sec)
{
  int nr = sec->nrelocs;
  int i;

  for (i = 0; i < nr; i++)
    {
      struct coff_reloc *r = sec->relocs + i;
      struct coff_symbol *ref;
      struct IT_rl rl;

      rl.apol = 0;
      rl.boundary = 0;
      rl.segment = 1;
      rl.sign = 0;
      rl.check = 0;
      rl.addr = r->offset;
      rl.bitloc = 0;
      rl.flen = 32;		/* SH Specific.  */

      /* What sort of reloc ? Look in the section to find out.  */
      ref = r->symbol;
      if (ref->visible->type == coff_vis_ext_ref)
	{
	  rl.bcount = 4;	/* Always 4 for us.  */
	  rl.op = OP_EXT_REF;
	  rl.symn = ref->er_number;
	}
      else if (ref->visible->type == coff_vis_common)
	{
	  rl.bcount = 11;	/* Always 11 for us.  */
	  rl.op = OP_SEC_REF;
	  rl.secn = ref->where->section->number;
	  rl.copcode_is_3 = 3;
	  rl.alength_is_4 = 4;
	  rl.addend = ref->where->offset - ref->where->section->address;
	  rl.aopcode_is_0x20 = 0x20;
	}
      else
	{
	  rl.bcount = 11;	/* Always 11 for us.  */
	  rl.op = OP_SEC_REF;
	  rl.secn = ref->where->section->number;
	  rl.copcode_is_3 = 3;
	  rl.alength_is_4 = 4;
	  rl.addend = -ref->where->section->address;
	  rl.aopcode_is_0x20 = 0x20;
	}

      rl.end = 0xff;

      if (   rl.op == OP_SEC_REF
	  || rl.op == OP_EXT_REF)
	sysroff_swap_rl_out (file, &rl);
    }
}

static void
wr_object_body (struct coff_ofile *p)
{
  int i;

  for (i = 1; i < p->nsections; i++)
    {
      wr_sh (p, p->sections + i);
      wr_ob (p, p->sections + i);
      wr_rl (p, p->sections + i);
    }
}

static void
wr_dps_start (struct coff_sfile *sfile,
	      struct coff_section *section ATTRIBUTE_UNUSED,
	      struct coff_scope *scope, int type, int nest)
{
  struct IT_dps dps;

  dps.end = 0;
  dps.opt = 0;
  dps.type = type;

  if (scope->sec)
    {
      dps.san = scope->sec->number;
      dps.address = scope->offset - find_base (sfile, scope->sec);
      dps.block_size = scope->size;

      if (debug)
	{
	  printf ("DPS %s %d %x\n",
		  sfile->name,
		  nest,
		  dps.address);
	}
    }
  else
    {
      dps.san = 0;
      dps.address = 0;
      dps.block_size = 0;
    }

  dps.nesting = nest;
  dps.neg = 0x1001;
  sysroff_swap_dps_out (file, &dps);
}

static void
wr_dps_end (struct coff_section *section ATTRIBUTE_UNUSED,
	    struct coff_scope *scope ATTRIBUTE_UNUSED, int type)
{
  struct IT_dps dps;

  dps.end = 1;
  dps.type = type;
  sysroff_swap_dps_out (file, &dps);
}

static int *
nints (int x)
{
  return (int *) (xcalloc (sizeof (int), x));
}

static void
walk_tree_type_1 (struct coff_sfile *sfile, struct coff_symbol *symbol,
		  struct coff_type *type, int nest)
{
  switch (type->type)
    {
    case coff_secdef_type:
    case coff_basic_type:
      {
	struct IT_dbt dbt;

	switch (type->u.basic)
	  {
	  case T_NULL:
	  case T_VOID:
	    dbt.btype = BTYPE_VOID;
	    dbt.sign = BTYPE_UNSPEC;
	    dbt.fptype = FPTYPE_NOTSPEC;
	    break;

	  case T_CHAR:
	    dbt.btype = BTYPE_CHAR;
	    dbt.sign = BTYPE_UNSPEC;
	    dbt.fptype = FPTYPE_NOTSPEC;
	    break;

	  case T_SHORT:
	  case T_INT:
	  case T_LONG:
	    dbt.btype = BTYPE_INT;
	    dbt.sign = SIGN_SIGNED;
	    dbt.fptype = FPTYPE_NOTSPEC;
	    break;

	  case T_FLOAT:
	    dbt.btype = BTYPE_FLOAT;
	    dbt.fptype = FPTYPE_SINGLE;
	    break;

	  case T_DOUBLE:
	    dbt.btype = BTYPE_FLOAT;
	    dbt.fptype = FPTYPE_DOUBLE;
	    break;

	  case T_LNGDBL:
	    dbt.btype = BTYPE_FLOAT;
	    dbt.fptype = FPTYPE_EXTENDED;
	    break;

	  case T_UCHAR:
	    dbt.btype = BTYPE_CHAR;
	    dbt.sign = SIGN_UNSIGNED;
	    dbt.fptype = FPTYPE_NOTSPEC;
	    break;

	  case T_USHORT:
	  case T_UINT:
	  case T_ULONG:
	    dbt.btype = BTYPE_INT;
	    dbt.sign = SIGN_UNSIGNED;
	    dbt.fptype = FPTYPE_NOTSPEC;
	    break;
	  }

	dbt.bitsize = type->size;
	dbt.neg = 0x1001;
	sysroff_swap_dbt_out (file, &dbt);
	break;
      }

    case coff_pointer_type:
      {
	struct IT_dpt dpt;

	dpt.dunno = 0;
	walk_tree_type_1 (sfile, symbol, type->u.pointer.points_to, nest + 1);
	dpt.neg = 0x1001;
	sysroff_swap_dpt_out (file, &dpt);
	break;
      }

    case coff_function_type:
      {
	struct IT_dfp dfp;
	struct coff_symbol *param;

	dfp.end = 0;
	dfp.spare = 0;
	dfp.nparams = type->u.function.parameters->nvars;
	dfp.neg = 0x1001;

	walk_tree_type_1 (sfile, symbol, type->u.function.function_returns, nest + 1);

	sysroff_swap_dfp_out (file, &dfp);

	for (param = type->u.function.parameters->vars_head;
	     param;
	     param = param->next)
	  walk_tree_symbol (sfile, 0, param, nest);

	dfp.end = 1;
	sysroff_swap_dfp_out (file, &dfp);
	break;
      }

    case coff_structdef_type:
      {
	struct IT_dbt dbt;
	struct IT_dds dds;
	struct coff_symbol *member;

	dds.spare = 0;
	dbt.btype = BTYPE_STRUCT;
	dbt.bitsize = type->size;
	dbt.sign = SIGN_UNSPEC;
	dbt.fptype = FPTYPE_NOTSPEC;
	dbt.sid = get_member_id (type->u.astructdef.idx);
	dbt.neg = 0x1001;
	sysroff_swap_dbt_out (file, &dbt);
	dds.end = 0;
	dds.neg = 0x1001;
	sysroff_swap_dds_out (file, &dds);

	for (member = type->u.astructdef.elements->vars_head;
	     member;
	     member = member->next)
	  walk_tree_symbol (sfile, 0, member, nest + 1);

	dds.end = 1;
	sysroff_swap_dds_out (file, &dds);

      }
      break;

    case coff_structref_type:
      {
	struct IT_dbt dbt;

	dbt.btype = BTYPE_TAG;
	dbt.bitsize = type->size;
	dbt.sign = SIGN_UNSPEC;
	dbt.fptype = FPTYPE_NOTSPEC;

	if (type->u.astructref.ref)
	  dbt.sid = get_member_id (type->u.astructref.ref->number);
	else
	  dbt.sid = 0;

	dbt.neg = 0x1001;
	sysroff_swap_dbt_out (file, &dbt);
      }
      break;

    case coff_array_type:
      {
	struct IT_dar dar;
	int j;
	int dims = 1;		/* Only output one dimension at a time.  */

	dar.dims = dims;
	dar.variable = nints (dims);
	dar.subtype = nints (dims);
	dar.spare = nints (dims);
	dar.max_variable = nints (dims);
	dar.maxspare = nints (dims);
	dar.max = nints (dims);
	dar.min_variable = nints (dims);
	dar.min = nints (dims);
	dar.minspare = nints (dims);
	dar.neg = 0x1001;
	dar.length = type->size / type->u.array.dim;

	for (j = 0; j < dims; j++)
	  {
	    dar.variable[j] = VARIABLE_FIXED;
	    dar.subtype[j] = SUB_INTEGER;
	    dar.spare[j] = 0;
	    dar.max_variable[j] = 0;
	    dar.max[j] = type->u.array.dim;
	    dar.min_variable[j] = 0;
	    dar.min[j] = 1;	/* Why isn't this 0 ? */
	  }
	walk_tree_type_1 (sfile, symbol, type->u.array.array_of, nest + 1);
	sysroff_swap_dar_out (file, &dar);
      }
      break;

    case coff_enumdef_type:
      {
	struct IT_dbt dbt;
	struct IT_den den;
	struct coff_symbol *member;

	dbt.btype = BTYPE_ENUM;
	dbt.bitsize = type->size;
	dbt.sign = SIGN_UNSPEC;
	dbt.fptype = FPTYPE_NOTSPEC;
	dbt.sid = get_member_id (type->u.aenumdef.idx);
	dbt.neg = 0x1001;
	sysroff_swap_dbt_out (file, &dbt);

	den.end = 0;
	den.neg = 0x1001;
	den.spare = 0;
	sysroff_swap_den_out (file, &den);

	for (member = type->u.aenumdef.elements->vars_head;
	     member;
	     member = member->next)
	  walk_tree_symbol (sfile, 0, member, nest + 1);

	den.end = 1;
	sysroff_swap_den_out (file, &den);
      }
      break;

    case coff_enumref_type:
      {
	struct IT_dbt dbt;

	dbt.btype = BTYPE_TAG;
	dbt.bitsize = type->size;
	dbt.sign = SIGN_UNSPEC;
	dbt.fptype = FPTYPE_NOTSPEC;
	dbt.sid = get_member_id (type->u.aenumref.ref->number);
	dbt.neg = 0x1001;
	sysroff_swap_dbt_out (file, &dbt);
      }
      break;

    default:
      fatal (_("Unrecognised type: %d"), type->type);
    }
}

/* Obsolete ?
   static void
   dty_start ()
   {
   struct IT_dty dty;
   dty.end = 0;
   dty.neg = 0x1001;
   dty.spare = 0;
   sysroff_swap_dty_out (file, &dty);
   }

   static void
   dty_stop ()
   {
   struct IT_dty dty;
   dty.end = 0;
   dty.neg = 0x1001;
   dty.end = 1;
   sysroff_swap_dty_out (file, &dty);
   }


   static void
   dump_tree_structure (sfile, symbol, type, nest)
   struct coff_sfile *sfile;
   struct coff_symbol *symbol;
   struct coff_type *type;
   int nest;
   {
   if (symbol->type->type == coff_function_type)
   {


   }

   }
 */

static void
walk_tree_type (struct coff_sfile *sfile, struct coff_symbol *symbol,
		struct coff_type *type, int nest)
{
  struct IT_dty dty;

  dty.spare = 0;
  dty.end = 0;
  dty.neg = 0x1001;

  if (symbol->type->type == coff_function_type)
    {
      sysroff_swap_dty_out (file, &dty);
      walk_tree_type_1 (sfile, symbol, type, nest);
      dty.end = 1;
      sysroff_swap_dty_out (file, &dty);

      wr_dps_start (sfile,
		    symbol->where->section,
		    symbol->type->u.function.code,
		    BLOCK_TYPE_FUNCTION, nest);
      wr_dps_start (sfile, symbol->where->section,
		    symbol->type->u.function.code,
		    BLOCK_TYPE_BLOCK, nest);
      walk_tree_scope (symbol->where->section,
		       sfile,
		       symbol->type->u.function.code,
		       nest + 1, BLOCK_TYPE_BLOCK);

      wr_dps_end (symbol->where->section,
		  symbol->type->u.function.code,
		  BLOCK_TYPE_BLOCK);
      wr_dps_end (symbol->where->section,
		  symbol->type->u.function.code, BLOCK_TYPE_FUNCTION);
    }
  else
    {
      sysroff_swap_dty_out (file, &dty);
      walk_tree_type_1 (sfile, symbol, type, nest);
      dty.end = 1;
      sysroff_swap_dty_out (file, &dty);
    }
}

static void
walk_tree_symbol (struct coff_sfile *sfile, struct coff_section *section ATTRIBUTE_UNUSED, struct coff_symbol *symbol, int nest)
{
  struct IT_dsy dsy;

  memset (&dsy, 0, sizeof(dsy));
  dsy.nesting = nest;

  switch (symbol->type->type)
    {
    case coff_function_type:
      dsy.type = STYPE_FUNC;
      dsy.assign = 1;
      break;

    case coff_structref_type:
    case coff_pointer_type:
    case coff_array_type:
    case coff_basic_type:
    case coff_enumref_type:
      dsy.type = STYPE_VAR;
      dsy.assign = 1;
      break;

    case coff_enumdef_type:
      dsy.type = STYPE_TAG;
      dsy.assign = 0;
      dsy.magic = 2;
      break;

    case coff_structdef_type:
      dsy.type = STYPE_TAG;
      dsy.assign = 0;
      dsy.magic = symbol->type->u.astructdef.isstruct ? 0 : 1;
      break;

    case coff_secdef_type:
      return;

    default:
      fatal (_("Unrecognised coff symbol type: %d"), symbol->type->type);
    }

  if (symbol->where->where == coff_where_member_of_struct)
    {
      dsy.assign = 0;
      dsy.type = STYPE_MEMBER;
    }

  if (symbol->where->where == coff_where_member_of_enum)
    {
      dsy.type = STYPE_ENUM;
      dsy.assign = 0;
      dsy.evallen = 4;
      dsy.evalue = symbol->where->offset;
    }

  if (symbol->type->type == coff_structdef_type
      || symbol->where->where == coff_where_entag
      || symbol->where->where == coff_where_strtag)
    {
      dsy.snumber = get_member_id (symbol->number);
    }
  else
    {
      dsy.snumber = get_ordinary_id (symbol->number);
    }

  dsy.sname = symbol->name[0] == '_' ? symbol->name + 1 : symbol->name;

  switch (symbol->visible->type)
    {
    case coff_vis_common:
    case coff_vis_ext_def:
      dsy.ainfo = AINFO_STATIC_EXT_DEF;
      break;

    case coff_vis_ext_ref:
      dsy.ainfo = AINFO_STATIC_EXT_REF;
      break;

    case coff_vis_int_def:
      dsy.ainfo = AINFO_STATIC_INT;
      break;

    case coff_vis_auto:
    case coff_vis_autoparam:
      dsy.ainfo = AINFO_AUTO;
      break;

    case coff_vis_register:
    case coff_vis_regparam:
      dsy.ainfo = AINFO_REG;
      break;
      break;

    case coff_vis_tag:
    case coff_vis_member_of_struct:
    case coff_vis_member_of_enum:
      break;

    default:
      fatal (_("Unrecognised coff symbol visibility: %d"), symbol->visible->type);
    }

  dsy.dlength = symbol->type->size;

  switch (symbol->where->where)
    {
    case coff_where_memory:

      dsy.section = symbol->where->section->number;
#ifdef FOOP
      dsy.section = 0;
#endif
      break;

    case coff_where_member_of_struct:
    case coff_where_member_of_enum:
    case coff_where_stack:
    case coff_where_register:
    case coff_where_unknown:
    case coff_where_strtag:
    case coff_where_entag:
    case coff_where_typedef:
      break;

    default:
      fatal (_("Unrecognised coff symbol location: %d"), symbol->where->where);
    }

  switch (symbol->where->where)
    {
    case coff_where_memory:
      dsy.address = symbol->where->offset - find_base (sfile, symbol->where->section);
      break;

    case coff_where_stack:
      dsy.address = symbol->where->offset;
      break;

    case coff_where_member_of_struct:
      if (symbol->where->bitsize)
	{
	  int bits = (symbol->where->offset * 8 + symbol->where->bitoffset);
	  dsy.bitunit = 1;
	  dsy.field_len = symbol->where->bitsize;
	  dsy.field_off = (bits / 32) * 4;
	  dsy.field_bitoff = bits % 32;
	}
      else
	{
	  dsy.bitunit = 0;

	  dsy.field_len = symbol->type->size;
	  dsy.field_off = symbol->where->offset;
	}
      break;

    case coff_where_member_of_enum:
      /*      dsy.bitunit = 0;
         dsy.field_len  = symbol->type->size;
         dsy.field_off = symbol->where->offset; */
      break;

    case coff_where_register:
    case coff_where_unknown:
    case coff_where_strtag:
    case coff_where_entag:
    case coff_where_typedef:
      break;

    default:
      fatal (_("Unrecognised coff symbol location: %d"), symbol->where->where);
    }

  if (symbol->where->where == coff_where_register)
    dsy.reg = rnames[symbol->where->offset];

  switch (symbol->visible->type)
    {
    case coff_vis_common:
      /* We do this 'cause common C symbols are treated as extdefs.  */
    case coff_vis_ext_def:
    case coff_vis_ext_ref:
      dsy.ename = symbol->name;
      break;

    case coff_vis_regparam:
    case coff_vis_autoparam:
      dsy.type = STYPE_PARAMETER;
      break;

    case coff_vis_int_def:
    case coff_vis_auto:
    case coff_vis_register:
    case coff_vis_tag:
    case coff_vis_member_of_struct:
    case coff_vis_member_of_enum:
      break;

    default:
      fatal (_("Unrecognised coff symbol visibility: %d"), symbol->visible->type);
    }

  dsy.sfn = 0;
  dsy.sln = 2;
  dsy.neg = 0x1001;

  sysroff_swap_dsy_out (file, &dsy);

  walk_tree_type (sfile, symbol, symbol->type, nest);
}

static void
walk_tree_scope (struct coff_section *section, struct coff_sfile *sfile, struct coff_scope *scope, int nest, int type)
{
  struct coff_symbol *vars;
  struct coff_scope *child;

  if (scope->vars_head
      || (scope->list_head && scope->list_head->vars_head))
    {
      wr_dps_start (sfile, section, scope, type, nest);

      if (nest == 0)
	wr_globals (tree, sfile, nest + 1);

      for (vars = scope->vars_head; vars; vars = vars->next)
	walk_tree_symbol (sfile, section, vars, nest);

      for (child = scope->list_head; child; child = child->next)
	walk_tree_scope (section, sfile, child, nest + 1, BLOCK_TYPE_BLOCK);

      wr_dps_end (section, scope, type);
    }
}

static void
walk_tree_sfile (struct coff_section *section, struct coff_sfile *sfile)
{
  walk_tree_scope (section, sfile, sfile->scope, 0, BLOCK_TYPE_COMPUNIT);
}

static void
wr_program_structure (struct coff_ofile *p, struct coff_sfile *sfile)
{
  if (p->nsections < 4)
    return;
  walk_tree_sfile (p->sections + 4, sfile);
}

static void
wr_du (struct coff_ofile *p, struct coff_sfile *sfile, int n)
{
  struct IT_du du;
  int lim;
  int i;
  int j;
  unsigned int *lowest = (unsigned *) nints (p->nsections);
  unsigned int *highest = (unsigned *) nints (p->nsections);

  du.format = bfd_get_file_flags (abfd) & EXEC_P ? 0 : 1;
  du.optimized = 0;
  du.stackfrmt = 0;
  du.spare = 0;
  du.unit = n;
  du.sections = p->nsections - 1;
  du.san = (int *) xcalloc (sizeof (int), du.sections);
  du.address = nints (du.sections);
  du.length = nints (du.sections);

  for (i = 0; i < du.sections; i++)
    {
      lowest[i] = ~0;
      highest[i] = 0;
    }

  lim = du.sections;
  for (j = 0; j < lim; j++)
    {
      int src = j;
      int dst = j;

      du.san[dst] = dst;

      if (sfile->section[src].init)
	{
	  du.length[dst]
	    = sfile->section[src].high - sfile->section[src].low + 1;
	  du.address[dst]
	    = sfile->section[src].low;
	}
      else
	{
	  du.length[dst] = 0;
	  du.address[dst] = 0;
	}

      if (debug)
	{
	  if (sfile->section[src].parent)
	    {
	      printf (" section %6s 0x%08x..0x%08x\n",
		      sfile->section[src].parent->name,
		      du.address[dst],
		      du.address[dst] + du.length[dst] - 1);
	    }
	}

      du.sections = dst + 1;
    }

  du.tool = "c_gcc";
  du.date = DATE;

  sysroff_swap_du_out (file, &du);
}

static void
wr_dus (struct coff_ofile *p ATTRIBUTE_UNUSED, struct coff_sfile *sfile)
{
  struct IT_dus dus;

  dus.efn = 0x1001;
  dus.ns = 1;			/* p->nsources; sac 14 jul 94 */
  dus.drb = nints (dus.ns);
  dus.fname = (char **) xcalloc (sizeof (char *), dus.ns);
  dus.spare = nints (dus.ns);
  dus.ndir = 0;
  /* Find the filenames.  */
  dus.drb[0] = 0;
  dus.fname[0] = sfile->name;

  sysroff_swap_dus_out (file, &dus);

}

/* Find the offset of the .text section for this sfile in the
   .text section for the output file.  */

static int
find_base (struct coff_sfile *sfile, struct coff_section *section)
{
  return sfile->section[section->number].low;
}

static void
wr_dln (struct coff_ofile *p ATTRIBUTE_UNUSED, struct coff_sfile *sfile,
	int n ATTRIBUTE_UNUSED)
{
  /* Count up all the linenumbers */

  struct coff_symbol *sy;
  int lc = 0;
  struct IT_dln dln;

  int idx;

  for (sy = sfile->scope->vars_head;
       sy;
       sy = sy->next)
    {
      struct coff_type *t = sy->type;
      if (t->type == coff_function_type)
	{
	  struct coff_line *l = t->u.function.lines;
	  if (l)
	    lc += l->nlines;
	}
    }

  dln.sfn = nints (lc);
  dln.sln = nints (lc);
  dln.cc = nints (lc);
  dln.section = nints (lc);

  dln.from_address = nints (lc);
  dln.to_address = nints (lc);


  dln.neg = 0x1001;

  dln.nln = lc;

  /* Run through once more and fill up the structure */
  idx = 0;
  for (sy = sfile->scope->vars_head;
       sy;
       sy = sy->next)
    {
      if (sy->type->type == coff_function_type)
	{
	  int i;
	  struct coff_line *l = sy->type->u.function.lines;
	  if (l)
	    {
	      int base = find_base (sfile, sy->where->section);
	      for (i = 0; i < l->nlines; i++)
		{
		  dln.section[idx] = sy->where->section->number;
		  dln.sfn[idx] = 0;
		  dln.sln[idx] = l->lines[i];
		  dln.from_address[idx] =
		    l->addresses[i] + sy->where->section->address - base;
		  dln.cc[idx] = 0;
		  if (idx)
		    dln.to_address[idx - 1] = dln.from_address[idx];
		  idx++;

		}
	      dln.to_address[idx - 1] = dln.from_address[idx - 1] + 2;
	    }
	}
    }
  if (lc)
    sysroff_swap_dln_out (file, &dln);
}

/* Write the global symbols out to the debug info.  */

static void
wr_globals (struct coff_ofile *p, struct coff_sfile *sfile,
	    int n ATTRIBUTE_UNUSED)
{
  struct coff_symbol *sy;

  for (sy = p->symbol_list_head;
       sy;
       sy = sy->next_in_ofile_list)
    {
      if (sy->visible->type == coff_vis_ext_def
	  || sy->visible->type == coff_vis_ext_ref)
	{
	  /* Only write out symbols if they belong to
	     the current source file.  */
	  if (sy->sfile == sfile)
	    walk_tree_symbol (sfile, 0, sy, 0);
	}
    }
}

static void
wr_debug (struct coff_ofile *p)
{
  struct coff_sfile *sfile;
  int n = 0;

  for (sfile = p->source_head;
       sfile;
       sfile = sfile->next)
    {
      if (debug)
	printf ("%s\n", sfile->name);

      wr_du (p, sfile, n);
      wr_dus (p, sfile);
      wr_program_structure (p, sfile);
      wr_dln (p, sfile, n);
      n++;
    }
}

static void
wr_cs (void)
{
  /* It seems that the CS struct is not normal - the size is wrong
     heres one I prepared earlier.  */
  static char b[] =
    {
    0x80,			/* IT */
    0x21,			/* RL */
    0x00,			/* number of chars in variable length part */
    0x80,			/* hd */
    0x00,			/* hs */
    0x80,			/* un */
    0x00,			/* us */
    0x80,			/* sc */
    0x00,			/* ss */
    0x80,			/* er */
    0x80,			/* ed */
    0x80,			/* sh */
    0x80,			/* ob */
    0x80,			/* rl */
    0x80,			/* du */
    0x80,			/* dps */
    0x80,			/* dsy */
    0x80,			/* dty */
    0x80,			/* dln */
    0x80,			/* dso */
    0x80,			/* dus */
    0x00,			/* dss */
    0x80,			/* dbt */
    0x00,			/* dpp */
    0x80,			/* dfp */
    0x80,			/* den */
    0x80,			/* dds */
    0x80,			/* dar */
    0x80,			/* dpt */
    0x00,			/* dul */
    0x00,			/* dse */
    0x00,			/* dot */
    0xDE			/* CS */
  };

  if (fwrite (b, sizeof (b), 1, file) != 1)
    /* FIXME: Return error status.  */
    fatal (_("Failed to write CS struct"));
}

/* Write out the SC records for a unit.  Create an SC
   for all the sections which appear in the output file, even
   if there isn't an equivalent one on the input.  */

static int
wr_sc (struct coff_ofile *ptr, struct coff_sfile *sfile)
{
  int i;
  int scount = 0;
  /* First work out the total number of sections.  */
  int total_sec = ptr->nsections;
  struct myinfo
    {
      struct coff_section *sec;
      struct coff_symbol *symbol;
    };
  struct coff_symbol *symbol;
  struct myinfo *info
    = (struct myinfo *) calloc (total_sec, sizeof (struct myinfo));


  for (i = 0; i < total_sec; i++)
    {
      info[i].sec = ptr->sections + i;
      info[i].symbol = 0;
    }

  for (symbol = sfile->scope->vars_head;
       symbol;
       symbol = symbol->next)
    {

      if (symbol->type->type == coff_secdef_type)
	{
	  for (i = 0; i < total_sec; i++)
	    {
	      if (symbol->where->section == info[i].sec)
		{
		  info[i].symbol = symbol;
		  break;
		}
	    }
	}
    }

  /* Now output all the section info, and fake up some stuff for sections
     we don't have.  */
  for (i = 1; i < total_sec; i++)
    {
      struct IT_sc sc;
      char *name;

      symbol = info[i].symbol;
      sc.spare = 0;
      sc.spare1 = 0;

      if (!symbol)
	{
	  /* Don't have a symbol set aside for this section, which means
	     that nothing in this file does anything for the section.  */
	  sc.format = !(bfd_get_file_flags (abfd) & EXEC_P);
	  sc.addr = 0;
	  sc.length = 0;
	  name = info[i].sec->name;
	}
      else
	{
	  if (bfd_get_file_flags (abfd) & EXEC_P)
	    {
	      sc.format = 0;
	      sc.addr = symbol->where->offset;
	    }
	  else
	    {
	      sc.format = 1;
	      sc.addr = 0;
	    }
	  sc.length = symbol->type->size;
	  name = symbol->name;
	}

      sc.align = 4;
      sc.concat = CONCAT_SIMPLE;
      sc.read = 3;
      sc.write = 3;
      sc.exec = 3;
      sc.init = 3;
      sc.mode = 3;
      sc.spare = 0;
      sc.segadd = 0;
      sc.spare1 = 0;		/* If not zero, then it doesn't work.  */
      sc.name = section_translate (name);

      if (strlen (sc.name) == 1)
	{
	  switch (sc.name[0])
	    {
	    case 'D':
	    case 'B':
	      sc.contents = CONTENTS_DATA;
	      break;

	    default:
	      sc.contents = CONTENTS_CODE;
	    }
	}
      else
	{
	  sc.contents = CONTENTS_CODE;
	}

      sysroff_swap_sc_out (file, &sc);
      scount++;
    }
  free (info);
  return scount;
}

/* Write out the ER records for a unit.  */

static void
wr_er (struct coff_ofile *ptr, struct coff_sfile *sfile ATTRIBUTE_UNUSED,
       int first)
{
  int idx = 0;
  struct coff_symbol *sym;

  if (first)
    {
      for (sym = ptr->symbol_list_head; sym; sym = sym->next_in_ofile_list)
	{
	  if (sym->visible->type == coff_vis_ext_ref)
	    {
	      struct IT_er er;

	      er.spare = 0;
	      er.type = ER_NOTSPEC;
	      er.name = sym->name;
	      sysroff_swap_er_out (file, &er);
	      sym->er_number = idx++;
	    }
	}
    }
}

/* Write out the ED records for a unit.  */

static void
wr_ed (struct coff_ofile *ptr, struct coff_sfile *sfile ATTRIBUTE_UNUSED,
       int first)
{
  struct coff_symbol *s;

  if (first)
    {
      for (s = ptr->symbol_list_head; s; s = s->next_in_ofile_list)
	{
	  if (s->visible->type == coff_vis_ext_def
	      || s->visible->type == coff_vis_common)
	    {
	      struct IT_ed ed;

	      ed.section = s->where->section->number;
	      ed.spare = 0;

	      if (s->where->section->data)
		{
		  ed.type = ED_TYPE_DATA;
		}
	      else if (s->where->section->code & SEC_CODE)
		{
		  ed.type = ED_TYPE_ENTRY;
		}
	      else
		{
		  ed.type = ED_TYPE_NOTSPEC;
		  ed.type = ED_TYPE_DATA;
		}

	      ed.address = s->where->offset - s->where->section->address;
	      ed.name = s->name;
	      sysroff_swap_ed_out (file, &ed);
	    }
	}
    }
}

static void
wr_unit_info (struct coff_ofile *ptr)
{
  struct coff_sfile *sfile;
  int first = 1;

  for (sfile = ptr->source_head;
       sfile;
       sfile = sfile->next)
    {
      long p1;
      long p2;
      int nsecs;

      p1 = ftell (file);
      wr_un (ptr, sfile, first, 0);
      nsecs = wr_sc (ptr, sfile);
      p2 = ftell (file);
      fseek (file, p1, SEEK_SET);
      wr_un (ptr, sfile, first, nsecs);
      fseek (file, p2, SEEK_SET);
      wr_er (ptr, sfile, first);
      wr_ed (ptr, sfile, first);
      first = 0;
    }
}

static void
wr_module (struct coff_ofile *p)
{
  wr_cs ();
  wr_hd (p);
  wr_unit_info (p);
  wr_object_body (p);
  wr_debug (p);
  wr_tr ();
}

static int
align (int x)
{
  return (x + 3) & ~3;
}

/* Find all the common variables and turn them into
   ordinary defs - dunno why, but thats what hitachi does with 'em.  */

static void
prescan (struct coff_ofile *otree)
{
  struct coff_symbol *s;
  struct coff_section *common_section;

  if (otree->nsections < 3)
    return;

  /* Find the common section - always section 3.  */
  common_section = otree->sections + 3;

  for (s = otree->symbol_list_head;
       s;
       s = s->next_in_ofile_list)
    {
      if (s->visible->type == coff_vis_common)
	{
	  struct coff_where *w = s->where;
	  /*      s->visible->type = coff_vis_ext_def; leave it as common */
	  common_section->size = align (common_section->size);
	  w->offset = common_section->size + common_section->address;
	  w->section = common_section;
	  common_section->size += s->type->size;
	  common_section->size = align (common_section->size);
	}
    }
}

ATTRIBUTE_NORETURN static void
show_usage (FILE *ffile, int status)
{
  fprintf (ffile, _("Usage: %s [option(s)] in-file [out-file]\n"), program_name);
  fprintf (ffile, _("Convert a COFF object file into a SYSROFF object file\n"));
  fprintf (ffile, _(" The options are:\n\
  -q --quick       (Obsolete - ignored)\n\
  -n --noprescan   Do not perform a scan to convert commons into defs\n\
  -d --debug       Display information about what is being done\n\
  @<file>          Read options from <file>\n\
  -h --help        Display this information\n\
  -v --version     Print the program's version number\n"));

  if (REPORT_BUGS_TO[0] && status == 0)
    fprintf (ffile, _("Report bugs to %s\n"), REPORT_BUGS_TO);
  exit (status);
}

int
main (int ac, char **av)
{
  int opt;
  static struct option long_options[] =
  {
    {"debug", no_argument, 0, 'd'},
    {"quick", no_argument, 0, 'q'},
    {"noprescan", no_argument, 0, 'n'},
    {"help", no_argument, 0, 'h'},
    {"version", no_argument, 0, 'V'},
    {NULL, no_argument, 0, 0}
  };
  char **matching;
  char *input_file;
  char *output_file;

#ifdef HAVE_LC_MESSAGES
  setlocale (LC_MESSAGES, "");
#endif
  setlocale (LC_CTYPE, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  program_name = av[0];
  xmalloc_set_program_name (program_name);
  bfd_set_error_program_name (program_name);

  expandargv (&ac, &av);

  while ((opt = getopt_long (ac, av, "dHhVvqn", long_options,
			     (int *) NULL))
	 != EOF)
    {
      switch (opt)
	{
	case 'q':
	  quick = 1;
	  break;
	case 'n':
	  noprescan = 1;
	  break;
	case 'd':
	  debug = 1;
	  break;
	case 'H':
	case 'h':
	  show_usage (stdout, 0);
	  /*NOTREACHED */
	case 'v':
	case 'V':
	  print_version ("srconv");
	  exit (0);
	  /*NOTREACHED */
	case 0:
	  break;
	default:
	  show_usage (stderr, 1);
	  /*NOTREACHED */
	}
    }

  /* The input and output files may be named on the command line.  */
  output_file = NULL;
  if (optind < ac)
    {
      input_file = av[optind];
      ++optind;
      if (optind < ac)
	{
	  output_file = av[optind];
	  ++optind;
	  if (optind < ac)
	    show_usage (stderr, 1);
	  if (filename_cmp (input_file, output_file) == 0)
	    {
	      fatal (_("input and output files must be different"));
	    }
	}
    }
  else
    input_file = 0;

  if (!input_file)
    {
      fatal (_("no input file specified"));
    }

  if (!output_file)
    {
      /* Take a .o off the input file and stick on a .obj.  If
         it doesn't end in .o, then stick a .obj on anyway */

      int len = strlen (input_file);

      output_file = xmalloc (len + 5);
      strcpy (output_file, input_file);

      if (len > 3
	  && output_file[len - 2] == '.'
	  && output_file[len - 1] == 'o')
	{
	  output_file[len] = 'b';
	  output_file[len + 1] = 'j';
	  output_file[len + 2] = 0;
	}
      else
	{
	  strcat (output_file, ".obj");
	}
    }

  abfd = bfd_openr (input_file, 0);

  if (!abfd)
    bfd_fatal (input_file);

  if (!bfd_check_format_matches (abfd, bfd_object, &matching))
    {
      bfd_nonfatal (input_file);

      if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
	{
	  list_matching_formats (matching);
	  free (matching);
	}
      exit (1);
    }

  file = fopen (output_file, FOPEN_WB);

  if (!file)
    fatal (_("unable to open output file %s"), output_file);

  if (debug)
    printf ("ids %d %d\n", base1, base2);

  tree = coff_grok (abfd);
  if (tree)
    {
      if (!noprescan)
	prescan (tree);

      wr_module (tree);
    }
  return 0;
}