/* main.c --- main function for stand-alone M32C simulator.

Copyright (C) 2005, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
Contributed by Red Hat, Inc.

This file is part of the GNU simulators.

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, see <http://www.gnu.org/licenses/>.  */


#include "config.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <assert.h>
#include <setjmp.h>
#include <signal.h>
#include <sys/types.h>

#ifdef HAVE_SYS_SOCKET_H
#ifdef HAVE_NETINET_IN_H
#ifdef HAVE_NETINET_TCP_H
#define HAVE_networking
#endif
#endif
#endif

#ifdef HAVE_networking
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#endif


#include "bfd.h"

#include "cpu.h"
#include "mem.h"
#include "misc.h"
#include "load.h"
#include "trace.h"
#ifdef TIMER_A
#include "int.h"
#include "timer_a.h"
#endif

#ifdef HAVE_networking
extern int m32c_console_ofd;
extern int m32c_console_ifd;
#endif

int m32c_disassemble = 0;
static unsigned int cycles = 0;

static void
done (int exit_code)
{
  if (verbose)
    {
      stack_heap_stats ();
      mem_usage_stats ();
      printf ("insns: %14s\n", comma (cycles));
    }
  exit (exit_code);
}

#ifdef HAVE_networking
static void
setup_tcp_console (char *portname)
{
  int port = atoi (portname);
  struct sockaddr_in address;
  int isocket;
  socklen_t as;
  unsigned char *a;

  if (port < 1024)
    {
      printf ("invalid port number %d\n", port);
      exit (1);
    }
  printf ("waiting for tcp console on port %d\n", port);

  memset (&address, 0, sizeof (address));
  address.sin_family = AF_INET;
  address.sin_port = htons (port);

  isocket = socket (AF_INET, SOCK_STREAM, 0);
  if (isocket == -1)
    {
      perror ("socket");
      exit (1);
    }

  if (bind (isocket, (struct sockaddr *) &address, sizeof (address)))
    {
      perror ("bind");
      exit (1);
    }
  listen (isocket, 2);

  printf ("waiting for connection...\n");
  as = sizeof (address);
  m32c_console_ifd = accept (isocket, (struct sockaddr *) &address, &as);
  if (m32c_console_ifd == -1)
    {
      perror ("accept");
      exit (1);
    }
  a = (unsigned char *) (&address.sin_addr.s_addr);
  printf ("connection from %d.%d.%d.%d\n", a[0], a[1], a[2], a[3]);
  m32c_console_ofd = m32c_console_ifd;
}
#endif

int
main (int argc, char **argv)
{
  int o;
  int save_trace;
  bfd *prog;
#ifdef HAVE_networking
  char *console_port_s = 0;
#endif

  setbuf (stdout, 0);

  in_gdb = 0;

  while ((o = getopt (argc, argv, "tc:vdm:C")) != -1)
    switch (o)
      {
      case 't':
	trace++;
	break;
      case 'c':
#ifdef HAVE_networking
	console_port_s = optarg;
#else
	fprintf (stderr, "Nework console not available in this build.\n");
#endif
	break;
      case 'C':
#ifdef HAVE_TERMIOS_H
	m32c_use_raw_console = 1;
#else
	fprintf (stderr, "Raw console not available in this build.\n");
#endif
	break;
      case 'v':
	verbose++;
	break;
      case 'd':
	m32c_disassemble++;
	break;
      case 'm':
	if (strcmp (optarg, "r8c") == 0 || strcmp (optarg, "m16c") == 0)
	  default_machine = bfd_mach_m16c;
	else if (strcmp (optarg, "m32cm") == 0
		 || strcmp (optarg, "m32c") == 0)
	  default_machine = bfd_mach_m32c;
	else
	  {
	    fprintf (stderr, "Invalid machine: %s\n", optarg);
	    exit (1);
	  }
	break;
      case '?':
	fprintf (stderr,
		 "usage: run [-v] [-C] [-c port] [-t] [-d] [-m r8c|m16c|m32cm|m32c]"
		 " program\n");
	exit (1);
      }

  prog = bfd_openr (argv[optind], 0);
  if (!prog)
    {
      fprintf (stderr, "Can't read %s\n", argv[optind]);
      exit (1);
    }

  if (!bfd_check_format (prog, bfd_object))
    {
      fprintf (stderr, "%s not a m32c program\n", argv[optind]);
      exit (1);
    }

  save_trace = trace;
  trace = 0;
  m32c_load (prog);
  trace = save_trace;

#ifdef HAVE_networking
  if (console_port_s)
    setup_tcp_console (console_port_s);
#endif

  sim_disasm_init (prog);

  while (1)
    {
      int rc;

      if (trace)
	printf ("\n");

      if (m32c_disassemble)
	sim_disasm_one ();

      enable_counting = verbose;
      cycles++;
      rc = decode_opcode ();
      enable_counting = 0;

      if (M32C_HIT_BREAK (rc))
	done (1);
      else if (M32C_EXITED (rc))
	done (M32C_EXIT_STATUS (rc));
      else
	assert (M32C_STEPPED (rc));

      trace_register_changes ();

#ifdef TIMER_A
      update_timer_a ();
#endif
    }
}