/* gdb.c - gdb remote stub module */
/*
 *  Copyright (C) 2003  Free Software Foundation, Inc.
 *  Copyright (C) 2006  Lubomir Kundrak
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <VasEBoot/types.h>
#include <VasEBoot/misc.h>
#include <VasEBoot/mm.h>
#include <VasEBoot/err.h>
#include <VasEBoot/dl.h>
#include <VasEBoot/normal.h>
#include <VasEBoot/term.h>
#include <VasEBoot/cpu/gdb.h>
#include <VasEBoot/gdb.h>
#include <VasEBoot/serial.h>
#include <VasEBoot/i18n.h>

VAS_EBOOT_MOD_LICENSE ("GPLv3+");

static VasEBoot_err_t
VasEBoot_cmd_gdbstub (struct VasEBoot_command *cmd __attribute__ ((unused)),
		  int argc, char **args)
{
  struct VasEBoot_serial_port *port;
  if (argc < 1)
    return VasEBoot_error (VAS_EBOOT_ERR_BAD_ARGUMENT, "port required");
  port = VasEBoot_serial_find (args[0]);
  if (!port)
    return VasEBoot_errno;
  VasEBoot_gdb_port = port;
  /* TRANSLATORS: at this position VAS_EBOOT waits for the user to do an action
     in remote debugger, namely to tell it to establish connection.  */
  VasEBoot_puts_ (N_("Now connect the remote debugger, please."));
  VasEBoot_gdb_breakpoint ();
  return 0;
}

static VasEBoot_err_t
VasEBoot_cmd_gdbstop (struct VasEBoot_command *cmd __attribute__ ((unused)),
		  int argc __attribute__ ((unused)),
		  char **args __attribute__ ((unused)))
{
  VasEBoot_gdb_port = NULL;
  return 0;
}

static VasEBoot_err_t
VasEBoot_cmd_gdb_break (struct VasEBoot_command *cmd __attribute__ ((unused)),
		    int argc __attribute__ ((unused)),
		    char **args __attribute__ ((unused)))
{
  if (!VasEBoot_gdb_port)
    return VasEBoot_error (VAS_EBOOT_ERR_BAD_ARGUMENT, "No GDB stub is running");
  VasEBoot_gdb_breakpoint ();
  return 0;
}

static VasEBoot_command_t cmd, cmd_stop, cmd_break;

VAS_EBOOT_MOD_INIT (gdb)
{
  VasEBoot_gdb_idtinit ();
  cmd = VasEBoot_register_command_lockdown ("gdbstub", VasEBoot_cmd_gdbstub,
					N_("PORT"),
					/*
					 * TRANSLATORS: GDB stub is a small part of
					 * GDB functionality running on local host
					 * which allows remote debugger to
					 * connect to it.
					 */
					N_("Start GDB stub on given port"));
  cmd_break = VasEBoot_register_command_lockdown ("gdbstub_break", VasEBoot_cmd_gdb_break,
					      /*
					       * TRANSLATORS: this refers to triggering
					       * a breakpoint so that the user will land
					       * into GDB.
					       */
					      0, N_("Break into GDB"));
  cmd_stop = VasEBoot_register_command_lockdown ("gdbstub_stop", VasEBoot_cmd_gdbstop,
					     0, N_("Stop GDB stub"));
}

VAS_EBOOT_MOD_FINI (gdb)
{
  VasEBoot_unregister_command (cmd);
  VasEBoot_unregister_command (cmd_break);
  VasEBoot_unregister_command (cmd_stop);
  VasEBoot_gdb_idtrestore ();
}