/*
 * Copyright 2010 Lemote, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 */

package sun.jvm.hotspot.debugger.mips;

import sun.jvm.hotspot.debugger.*;

/** Specifies the thread context on x86 platforms; only a sub-portion
    of the context is guaranteed to be present on all operating
    systems. */

public abstract class MIPSThreadContext implements ThreadContext {
  // Taken from /usr/include/ia32/sys/reg.h on Solaris/x86

  // NOTE: the indices for the various registers must be maintained as
  // listed across various operating systems. However, only a small
  // subset of the registers' values are guaranteed to be present (and
  // must be present for the SA's stack walking to work): EAX, EBX,
  // ECX, EDX, ESI, EDI, EBP, ESP, and EIP.

  public static final int ZERO = 0;
  public static final int AT = 1;
  public static final int V0 = 2;
  public static final int V1 = 3;
  public static final int A0 = 4;
  public static final int A1 = 5;
  public static final int A2 = 6;
  public static final int A3 = 7;
  public static final int T0 = 8;
  public static final int T1 = 9;
  public static final int T2 = 10;
  public static final int T3 = 11;
  public static final int T4 = 12;
  public static final int T5 = 13;
  public static final int T6 = 14;
  public static final int T7 = 15;
  public static final int S0 = 16;
  public static final int S1 = 17;
  public static final int S2 = 18;
  public static final int S3 = 19;
  public static final int S4 = 20;
  public static final int S5 = 21;
  public static final int S6 = 22;
  public static final int S7 = 23;
  public static final int T8 = 24;
  public static final int T9 = 25;
  public static final int K0 = 26;
  public static final int K1 = 27;
  public static final int GP = 28;
  public static final int SP = 29;
  public static final int FP = 30;
  public static final int RA = 31;



  private static final String[] regNames = {
    "ZERO",		"AT",		"V0",		"V1",
    "A0",    	"A1",   "A2",   "A3",
    "T0",    	"T1",   "T2",   "T3",
    "T4", 		"T5",   "T6",   "T7",
    "S0", 		"S1",  	"S2",		"S3",
    "S4",   	"S5",   "S6",   "S7",
    "T8",    	"T9",		"K0",		"K1"
    "GP",    	"SP",   "FP",   "RA"
  };

  // Ought to be int on x86 but we're stuck
  private long[] data;

  public MIPSThreadContext() {
    data = new long[NPRGREG];
  }

  public int getNumRegisters() {
    return NPRGREG;
  }

  public String getRegisterName(int index) {
    return regNames[index];
  }

  public void setRegister(int index, long value) {
    data[index] = value;
  }

  public long getRegister(int index) {
    return data[index];
  }

  /** This can't be implemented in this class since we would have to
      tie the implementation to, for example, the debugging system */
  public abstract void setRegisterAsAddress(int index, Address value);

  /** This can't be implemented in this class since we would have to
      tie the implementation to, for example, the debugging system */
  public abstract Address getRegisterAsAddress(int index);
}