/* ldemul.c -- clearing house for ld emulation states
   Copyright (C) 1991, 1993 Free Software Foundation, Inc.

This file is part of GLD, the Gnu Linker.

GLD 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, or (at your option)
any later version.

GLD 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 GLD; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

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

#include "ld.h"
#include "ldemul.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldfile.h"
#include "ldmain.h"
#include "ldemul-list.h"

ld_emulation_xfer_type *ld_emulation;

void
ldemul_hll(name)
     char *name;
{
  ld_emulation->hll(name);
}


void ldemul_syslib(name)
     char *name;
{
  ld_emulation->syslib(name);
}

void
ldemul_after_parse()
{
  ld_emulation->after_parse();
}

void
ldemul_before_parse()
{
  ld_emulation->before_parse();
}

void
ldemul_after_open ()
{
  ld_emulation->after_open ();
}

void 
ldemul_after_allocation()
{
  ld_emulation->after_allocation();
}

void 
ldemul_before_allocation()
{
  if (ld_emulation->before_allocation)
    ld_emulation->before_allocation();
}


void
ldemul_set_output_arch()
{
  ld_emulation->set_output_arch();
}

void
ldemul_finish()
{
  if (ld_emulation->finish)
    ld_emulation->finish();
}

void
ldemul_set_symbols()
{
  if (ld_emulation->set_symbols)
    ld_emulation->set_symbols();
}

void
ldemul_create_output_section_statements()
{
  if (ld_emulation->create_output_section_statements)
    ld_emulation->create_output_section_statements();
}

char *
ldemul_get_script(isfile)
     int *isfile;
{
  return ld_emulation->get_script(isfile);
}

boolean
ldemul_open_dynamic_archive (arch, search, entry)
     const char *arch;
     search_dirs_type *search;
     lang_input_statement_type *entry;
{
  if (ld_emulation->open_dynamic_archive)
    return (*ld_emulation->open_dynamic_archive) (arch, search, entry);
  return false;
}

boolean
ldemul_place_orphan (file, s)
     lang_input_statement_type *file;
     asection *s;
{
  if (ld_emulation->place_orphan)
    return (*ld_emulation->place_orphan) (file, s);
  return false;
}

int
ldemul_parse_args (argc, argv)
     int argc;
     char **argv;
{
  /* Try and use the emulation parser if there is one. */
  if (ld_emulation->parse_args)
    {
      return ld_emulation->parse_args (argc, argv);
    }
  return 0;
}

/* Let the emulation code handle an unrecognized file.  */

boolean
ldemul_unrecognized_file (entry)
     lang_input_statement_type *entry;
{
  if (ld_emulation->unrecognized_file)
    return (*ld_emulation->unrecognized_file) (entry);
  return false;
}

char *
ldemul_choose_target()
{
  return ld_emulation->choose_target();
}

/* The default choose_target function.  */

char *
ldemul_default_target()
{
  char *from_outside = (char *) getenv(TARGET_ENVIRON);
  if (from_outside != (char *)NULL)
    return from_outside;
  return ld_emulation->target_name;
}

void 
after_parse_default()
{

}

void
after_open_default ()
{
}

void
after_allocation_default()
{

}

void
before_allocation_default()
{

}

void
set_output_arch_default()
{
  /* Set the output architecture and machine if possible */
  bfd_set_arch_mach(output_bfd,
	            ldfile_output_architecture, ldfile_output_machine);
}

/*ARGSUSED*/
void
syslib_default(ignore)
     char  *ignore;
{
  info_msg ("%S SYSLIB ignored\n");
}

/*ARGSUSED*/
void
hll_default(ignore)
     char  *ignore;
{
  info_msg ("%S HLL ignored\n");
}

ld_emulation_xfer_type *ld_emulations[] = { EMULATION_LIST };

void
ldemul_choose_mode(target)
     char *target;
{
    ld_emulation_xfer_type **eptr = ld_emulations;
    /* Ignore "gld" prefix. */
    if (target[0] == 'g' && target[1] == 'l' && target[2] == 'd')
	target += 3;
    for (; *eptr; eptr++)
      {
	if (strcmp(target, (*eptr)->emulation_name) == 0)
	  {
	    ld_emulation = *eptr;
	    return;
	  }
      }
    einfo ("%P: unrecognised emulation mode: %s\n", target);
    einfo ("Supported emulations: ", program_name);
    ldemul_list_emulations (stderr);
    einfo ("%F\n");
}

void
ldemul_list_emulations (f)
     FILE *f;
{
  ld_emulation_xfer_type **eptr = ld_emulations;
  boolean first = true;

  for (; *eptr; eptr++)
    {
      if (first)
	first = false;
      else
	fprintf (f, " ");
      fprintf (f, "%s", (*eptr)->emulation_name);
    }
}
