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/* Low level interface to HP800 running mach 4.0.

   Copyright 1995, 2000, 2001 Free Software Foundation, Inc.

   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 2 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., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#include "defs.h"

#include "inferior.h"

#include "floatformat.h"

#include "regcache.h"

#include <stdio.h>

#include <mach.h>

#include <mach/message.h>

#include <mach/exception.h>

#include <mach_error.h>

#include <target.h>

/*

 * Fetch inferiors registers for gdb.

 * REGNO specifies which (as gdb views it) register, -1 for all.

 */

void

fetch_inferior_registers (int regno)

{

  kern_return_t ret;

  thread_state_data_t state;

  unsigned int stateCnt = TRACE_FLAVOR_SIZE;

  int index;

  if (!MACH_PORT_VALID (current_thread))

    error ("fetch inferior registers: Invalid thread");

  if (must_suspend_thread)

    setup_thread (current_thread, 1);

  ret = thread_get_state (current_thread,

                          TRACE_FLAVOR,

                          state,

                          &stateCnt);

  if (ret != KERN_SUCCESS)

    warning ("fetch_inferior_registers: %s ",

             mach_error_string (ret));

  else

    {

      for (index = 0; index < NUM_REGS; index++)

        supply_register (index, (void *) &state[index]);

    }

  if (must_suspend_thread)

    setup_thread (current_thread, 0);

}

/* Store our register values back into the inferior.

 * If REGNO is -1, do this for all registers.

 * Otherwise, REGNO specifies which register

 *

 * On mach3 all registers are always saved in one call.

 */

void

store_inferior_registers (int regno)

{

  kern_return_t ret;

  thread_state_data_t state;

  unsigned int stateCnt = TRACE_FLAVOR_SIZE;

  register int index;

  if (!MACH_PORT_VALID (current_thread))

    error ("store inferior registers: Invalid thread");

  if (must_suspend_thread)

    setup_thread (current_thread, 1);

  /* Fetch the state of the current thread */

  ret = thread_get_state (current_thread,

                          TRACE_FLAVOR,

                          state,

                          &stateCnt);

  if (ret != KERN_SUCCESS)

    {

      warning ("store_inferior_registers (get): %s",

               mach_error_string (ret));

      if (must_suspend_thread)

        setup_thread (current_thread, 0);

      return;

    }

  /* move gdb's registers to thread's state

   * Since we save all registers anyway, save the ones

   * that gdb thinks are valid (e.g. ignore the regno

   * parameter)

   */

  if (regno > 0 && regno < NUM_REGS)

    {

      memcpy (&state[regno], &registers[REGISTER_BYTE (regno)],

              REGISTER_RAW_SIZE (regno));

    }

  else

    {

      for (index = 0; index < NUM_REGS; index++)

        memcpy (&state[index], &registers[REGISTER_BYTE (index)],

                REGISTER_RAW_SIZE (index));

/*      state[index] = registers[REGISTER_BYTE (index)]; */

    }

  /* Write gdb's current view of register to the thread

   */

  ret = thread_set_state (current_thread,

                          TRACE_FLAVOR,

                          state,

                          TRACE_FLAVOR_SIZE);

  if (ret != KERN_SUCCESS)

    warning ("store_inferior_registers (set): %s",

             mach_error_string (ret));

  if (must_suspend_thread)

    setup_thread (current_thread, 0);

}