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/* Target operations for the remote server for GDB.

   Copyright (C) 2002, 2004, 2005, 2007, 2008, 2009, 2010

   Free Software Foundation, Inc.

   Contributed by MontaVista Software.

   This file is part of GDB.

   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 "server.h"

struct target_ops *the_target;

void

set_desired_inferior (int use_general)

{

  struct thread_info *found;

  if (use_general == 1)

    found = find_thread_ptid (general_thread);

  else

    {

      found = NULL;

      /* If we are continuing any (all) thread(s), use step_thread

         to decide which thread to step and/or send the specified

         signal to.  */

      if ((!ptid_equal (step_thread, null_ptid)

           && !ptid_equal (step_thread, minus_one_ptid))

          && (ptid_equal (cont_thread, null_ptid)

              || ptid_equal (cont_thread, minus_one_ptid)))

        found = find_thread_ptid (step_thread);

      if (found == NULL)

        found = find_thread_ptid (cont_thread);

    }

  if (found == NULL)

    current_inferior = (struct thread_info *) all_threads.head;

  else

    current_inferior = found;

}

int

read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)

{

  int res;

  res = (*the_target->read_memory) (memaddr, myaddr, len);

  check_mem_read (memaddr, myaddr, len);

  return res;

}

int

write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,

                       int len)

{

  /* Lacking cleanups, there is some potential for a memory leak if the

     write fails and we go through error().  Make sure that no more than

     one buffer is ever pending by making BUFFER static.  */

  static unsigned char *buffer = 0;

  int res;

  if (buffer != NULL)

    free (buffer);

  buffer = xmalloc (len);

  memcpy (buffer, myaddr, len);

  check_mem_write (memaddr, buffer, len);

  res = (*the_target->write_memory) (memaddr, buffer, len);

  free (buffer);

  buffer = NULL;

  return res;

}

ptid_t

mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,

        int connected_wait)

{

  ptid_t ret;

  if (connected_wait)

    server_waiting = 1;

  ret = (*the_target->wait) (ptid, ourstatus, options);

  if (ourstatus->kind == TARGET_WAITKIND_EXITED)

    fprintf (stderr,

             "\nChild exited with status %d\n", ourstatus->value.sig);

  else if (ourstatus->kind == TARGET_WAITKIND_SIGNALLED)

    fprintf (stderr, "\nChild terminated with signal = 0x%x (%s)\n",

             target_signal_to_host (ourstatus->value.sig),

             target_signal_to_name (ourstatus->value.sig));

  if (connected_wait)

    server_waiting = 0;

  return ret;

}

int

start_non_stop (int nonstop)

{

  if (the_target->start_non_stop == NULL)

    {

      if (nonstop)

        return -1;

      else

        return 0;

    }

  return (*the_target->start_non_stop) (nonstop);

}

void

set_target_ops (struct target_ops *target)

{

  the_target = (struct target_ops *) xmalloc (sizeof (*the_target));

  memcpy (the_target, target, sizeof (*the_target));

}

/* Convert pid to printable format.  */

const char *

target_pid_to_str (ptid_t ptid)

{

  static char buf[80];

  if (ptid_equal (ptid, minus_one_ptid))

    snprintf (buf, sizeof (buf), "<all threads>");

  else if (ptid_equal (ptid, null_ptid))

    snprintf (buf, sizeof (buf), "<null thread>");

  else if (ptid_get_tid (ptid) != 0)

    snprintf (buf, sizeof (buf), "Thread %d.0x%lx",

              ptid_get_pid (ptid), ptid_get_tid (ptid));

  else if (ptid_get_lwp (ptid) != 0)

    snprintf (buf, sizeof (buf), "LWP %d.%ld",

              ptid_get_pid (ptid), ptid_get_lwp (ptid));

  else

    snprintf (buf, sizeof (buf), "Process %d",

              ptid_get_pid (ptid));

  return buf;

}