/* Low level interface to HP800 running mach 4.0 for GDB, the GNU
   debugger.

   Copyright 1995, 2000, 2001, 2003 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;
  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], &deprecated_registers[REGISTER_BYTE (regno)],
	      REGISTER_RAW_SIZE (regno));
    }
  else
    {
      for (index = 0; index < NUM_REGS; index++)
	memcpy (&state[index], &deprecated_registers[REGISTER_BYTE (index)],
		REGISTER_RAW_SIZE (index));
/*      state[index] = deprecated_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);
}