/*
* Copyright 2002-2003 Sun Microsystems, 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.
*
*/
/*
* Original code for this class taken from the Java HotSpot VM.
* Modified for use with the Jakstab project. All modifications
* Copyright 2007-2015 Johannes Kinder <jk@jakstab.org>
*/
package org.jakstab.disasm.x86;
import org.jakstab.asm.Instruction;
import org.jakstab.asm.Operation;
import org.jakstab.asm.x86.X86InstructionFactory;
import org.jakstab.util.BinaryInputBuffer;
public class GRPDecoder extends InstructionDecoder {
final private int number;
//Please refer to IA-32 Intel Architecture Software Developer's Manual Volume 2
//APPENDIX A - Table A-4. Opcode Extensions for One and Two-byte Opcodes by Group Number.
private static final InstructionDecoder grpTable[][] = {
{
new ArithmeticDecoder("addb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.ADD),
new ArithmeticDecoder("orb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.OR),
new ArithmeticDecoder("adcb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.ADDC),
new ArithmeticDecoder("sbbb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.SUBC),
new ArithmeticDecoder("andb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.AND),
new ArithmeticDecoder("subb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.SUB),
new ArithmeticDecoder("xorb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.XOR),
new InstructionDecoder("cmpb", ADDR_E, b_mode, ADDR_I, b_mode)
},
{
new ArithmeticDecoder("addS", ADDR_E, v_mode, ADDR_I, v_mode, Operation.ADD),
new ArithmeticDecoder("orS", ADDR_E, v_mode, ADDR_I, v_mode, Operation.OR),
new ArithmeticDecoder("adcS", ADDR_E, v_mode, ADDR_I, v_mode, Operation.ADDC),
new ArithmeticDecoder("sbbS", ADDR_E, v_mode, ADDR_I, v_mode, Operation.SUBC),
new ArithmeticDecoder("andS", ADDR_E, v_mode, ADDR_I, v_mode, Operation.AND),
new ArithmeticDecoder("subS", ADDR_E, v_mode, ADDR_I, v_mode, Operation.SUB),
new ArithmeticDecoder("xorS", ADDR_E, v_mode, ADDR_I, v_mode, Operation.XOR),
new InstructionDecoder("cmpS", ADDR_E, v_mode, ADDR_I, v_mode)
},
{
new ArithmeticDecoder("addS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.ADD), /*note: sIb here*/
new ArithmeticDecoder("orS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.OR),
new ArithmeticDecoder("adcS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.ADDC),
new ArithmeticDecoder("sbbS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.SUBC),
new ArithmeticDecoder("andS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.AND),
new ArithmeticDecoder("subS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.SUB),
new ArithmeticDecoder("xorS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.XOR),
new InstructionDecoder("cmpS", ADDR_E, v_mode, ADDR_I, b_mode)
},
{
new ArithmeticDecoder("rolb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.RL),
new ArithmeticDecoder("rorb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.RR),
new ArithmeticDecoder("rclb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.RLC),
new ArithmeticDecoder("rcrb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.RRC),
new ArithmeticDecoder("shlb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.SLL),
new ArithmeticDecoder("shrb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.SRL),
null,
new ArithmeticDecoder("sarb", ADDR_E, b_mode, ADDR_I, b_mode, Operation.SRA),
},
{
new ArithmeticDecoder("rolS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.RL),
new ArithmeticDecoder("rorS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.RR),
new ArithmeticDecoder("rclS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.RLC),
new ArithmeticDecoder("rcrS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.RRC),
new ArithmeticDecoder("shlS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.SLL),
new ArithmeticDecoder("shrS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.SRL),
null,
new ArithmeticDecoder("sarS", ADDR_E, v_mode, ADDR_I, b_mode, Operation.SRA)
},
{
new ArithmeticDecoder("rolb", ADDR_E, b_mode, Operation.RL),
new ArithmeticDecoder("rorb", ADDR_E, b_mode, Operation.RR),
new ArithmeticDecoder("rclb", ADDR_E, b_mode, Operation.RLC),
new ArithmeticDecoder("rcrb", ADDR_E, b_mode, Operation.RRC),
new ArithmeticDecoder("shlb", ADDR_E, b_mode, Operation.SLL),
new ArithmeticDecoder("shrb", ADDR_E, b_mode, Operation.SRL),
null,
new ArithmeticDecoder("sarb", ADDR_E, b_mode, Operation.SRA)
},
{
new ArithmeticDecoder("rolS", ADDR_E, v_mode, Operation.RL),
new ArithmeticDecoder("rorS", ADDR_E, v_mode, Operation.RR),
new ArithmeticDecoder("rclS", ADDR_E, v_mode, Operation.RLC),
new ArithmeticDecoder("rcrS", ADDR_E, v_mode, Operation.RRC),
new ArithmeticDecoder("shlS", ADDR_E, v_mode, Operation.SLL),
new ArithmeticDecoder("shrS", ADDR_E, v_mode, Operation.SRL),
null,
new ArithmeticDecoder("sarS", ADDR_E, v_mode, Operation.SRA)
},
{
new ArithmeticDecoder("rolb", ADDR_E, b_mode, ADDR_REG, CL, Operation.RL),
new ArithmeticDecoder("rorb", ADDR_E, b_mode, ADDR_REG, CL, Operation.RR),
new ArithmeticDecoder("rclb", ADDR_E, b_mode, ADDR_REG, CL, Operation.RLC),
new ArithmeticDecoder("rcrb", ADDR_E, b_mode, ADDR_REG, CL, Operation.RRC),
new ArithmeticDecoder("shlb", ADDR_E, b_mode, ADDR_REG, CL, Operation.SLL),
new ArithmeticDecoder("shrb", ADDR_E, b_mode, ADDR_REG, CL, Operation.SRL),
null,
new ArithmeticDecoder("sarb", ADDR_E, b_mode, ADDR_REG, CL, Operation.SRA)
},
{
new ArithmeticDecoder("rolS", ADDR_E, v_mode, ADDR_REG, CL, Operation.RL),
new ArithmeticDecoder("rorS", ADDR_E, v_mode, ADDR_REG, CL, Operation.RR),
new ArithmeticDecoder("rclS", ADDR_E, v_mode, ADDR_REG, CL, Operation.RLC),
new ArithmeticDecoder("rcrS", ADDR_E, v_mode, ADDR_REG, CL, Operation.RRC),
new ArithmeticDecoder("shlS", ADDR_E, v_mode, ADDR_REG, CL, Operation.SLL),
new ArithmeticDecoder("shrS", ADDR_E, v_mode, ADDR_REG, CL, Operation.SRL),
null,
new ArithmeticDecoder("sarS", ADDR_E, v_mode, ADDR_REG, CL, Operation.SRA)
},
{
new InstructionDecoder("testb", ADDR_E, b_mode, ADDR_I, b_mode),
null, /*new InstructionDecoder("(bad)", ADDR_E, b_mode)*/
new ArithmeticDecoder("notb", ADDR_E, b_mode, Operation.NOT),
new InstructionDecoder("negb", ADDR_E, b_mode),
new ArithmeticDecoder("mulb", ADDR_REG, AL, ADDR_E, b_mode, Operation.UMUL),
new ArithmeticDecoder("imulb", ADDR_REG, AL, ADDR_E, b_mode, Operation.SMUL),
new ArithmeticDecoder("divb", ADDR_REG, AL, ADDR_E, b_mode, Operation.UDIV),
new ArithmeticDecoder("idivb", ADDR_REG, AL, ADDR_E, b_mode, Operation.SDIV)
},
{
new InstructionDecoder("testS", ADDR_E, v_mode, ADDR_I, v_mode),
null,
new ArithmeticDecoder("notS", ADDR_E, v_mode, Operation.NOT),
new InstructionDecoder("negS", ADDR_E, v_mode),
new ArithmeticDecoder("mulS", ADDR_REG, EAX, ADDR_E, v_mode, Operation.UMUL),
new ArithmeticDecoder("imulS", ADDR_REG, EAX, ADDR_E, v_mode, Operation.SMUL),
new ArithmeticDecoder("divS", ADDR_REG, EAX, ADDR_E, v_mode, Operation.SDIV),
new ArithmeticDecoder("idivS", ADDR_REG, EAX, ADDR_E, v_mode, Operation.SDIV)
},
{
new ArithmeticDecoder("incb", ADDR_E, b_mode, Operation.ADD),
new ArithmeticDecoder("decb", ADDR_E, b_mode, Operation.SUB),
null,
null,
null,
null,
null,
null
},
{
new ArithmeticDecoder("incS", ADDR_E, v_mode, Operation.ADD),
new ArithmeticDecoder("decS", ADDR_E, v_mode, Operation.SUB),
new CallDecoder("call", ADDR_E, v_mode),
new CallDecoder("lcall", ADDR_E, p_mode),
new JmpDecoder("jmp", ADDR_E, v_mode),
new JmpDecoder("ljmp", ADDR_E, p_mode),
new InstructionDecoder("pushS", ADDR_E, v_mode),
null
},
{
new InstructionDecoder("sldt", ADDR_E, w_mode),
new InstructionDecoder("str", ADDR_E, w_mode),
new InstructionDecoder("lldt", ADDR_E, w_mode),
new InstructionDecoder("ltr", ADDR_E, w_mode),
new InstructionDecoder("verr", ADDR_E, w_mode),
new InstructionDecoder("verw", ADDR_E, w_mode),
null,
null
},
{
new InstructionDecoder("sgdt", ADDR_E, w_mode),
new InstructionDecoder("sidt", ADDR_E, w_mode),
new InstructionDecoder("lgdt", ADDR_E, w_mode),
new InstructionDecoder("lidt", ADDR_E, w_mode),
new InstructionDecoder("smsw", ADDR_E, w_mode),
null,
new InstructionDecoder("lmsw", ADDR_E, w_mode),
new InstructionDecoder("invlpg", ADDR_E, w_mode)
},
{
null,
null,
null,
null,
new InstructionDecoder("btS", ADDR_E, v_mode, ADDR_I, b_mode),
new InstructionDecoder("btsS", ADDR_E, v_mode, ADDR_I, b_mode),
new InstructionDecoder("btrS", ADDR_E, v_mode, ADDR_I, b_mode),
new InstructionDecoder("btcS", ADDR_E, v_mode, ADDR_I, b_mode)
},
/*16*/
{
null,
new SSEInstructionDecoder("cmpxch8b", ADDR_W, q_mode),
null,
null,
null,
null,
null,
null
},
/*17*/
{
null,
null,
new SSEArithmeticDecoder("psrlw", ADDR_P, q_mode, ADDR_I, b_mode, Operation.SRL),
null,
new SSEArithmeticDecoder("psraw", ADDR_P, q_mode, ADDR_I, b_mode, Operation.SRA),
null,
new SSEArithmeticDecoder("psllw", ADDR_P, q_mode, ADDR_I, b_mode, Operation.SLL),
null
},
/*18*/
{
null,
null,
new SSEArithmeticDecoder("psrld", ADDR_P, q_mode, ADDR_I, b_mode, Operation.SRL),
null,
new SSEArithmeticDecoder("psrad", ADDR_P, q_mode, ADDR_I, b_mode, Operation.SRA),
null,
new SSEArithmeticDecoder("pslld", ADDR_P, q_mode, ADDR_I, b_mode, Operation.SLL),
null
},
/*19*/
{
null,
null,
new SSEArithmeticDecoder("psrlq", ADDR_P, q_mode, ADDR_I, b_mode, Operation.SRL),
null,
null,
null,
new SSEArithmeticDecoder("psllq", ADDR_P, q_mode, ADDR_I, b_mode, Operation.SLL),
null
},
/*20 - Grp15*/
{
// FIXME: JK: I think these are wrong - byteindex is not advanced by constructor
// without operands, even though a modrm byte is present!
new SSEInstructionDecoder("fxsave", ADDR_E, b_mode),
new SSEInstructionDecoder("fxrstor", ADDR_E, b_mode),
new SSEInstructionDecoder("ldmxcsr", ADDR_E, d_mode),
new SSEInstructionDecoder("stmxcsr", ADDR_E, d_mode),
null,
null,
null,
new SSEInstructionDecoder("clflush", ADDR_E, b_mode)
},
/*21 - Grp16*/
{
new SSEInstructionDecoder("prefetchnta", ADDR_E, b_mode),
new SSEInstructionDecoder("prefetcht0", ADDR_E, b_mode),
new SSEInstructionDecoder("prefetcht1", ADDR_E, b_mode),
new SSEInstructionDecoder("prefetcht2", ADDR_E, b_mode),
null,
null,
null,
null
},
/*22 - Grp12:66*/
{
null,
null,
new SSEArithmeticDecoder("psrlw", ADDR_P, dq_mode, ADDR_I, b_mode, Operation.SRL),
null,
new SSEArithmeticDecoder("psraw", ADDR_P, dq_mode, ADDR_I, b_mode, Operation.SRA),
null,
new SSEArithmeticDecoder("psllw", ADDR_P, dq_mode, ADDR_I, b_mode, Operation.SLL),
null
},
/*23 - Grp13:66*/
{
null,
null,
new SSEArithmeticDecoder("psrld", ADDR_W, dq_mode, ADDR_I, b_mode, Operation.SRL),
null,
new SSEArithmeticDecoder("psrad", ADDR_W, dq_mode, ADDR_I, b_mode, Operation.SRA),
null,
new SSEArithmeticDecoder("pslld", ADDR_W, dq_mode, ADDR_I, b_mode, Operation.SLL),
null
},
/*24 - - Grp14:66*/
{
null,
null,
new SSEArithmeticDecoder("psrlq", ADDR_W, dq_mode, ADDR_I, b_mode, Operation.SRL),
new SSEArithmeticDecoder("psrldq", ADDR_W, dq_mode, ADDR_I, b_mode, Operation.SRL),
null,
null,
new SSEArithmeticDecoder("psllq", ADDR_W, dq_mode, ADDR_I, b_mode, Operation.SLL),
new SSEArithmeticDecoder("psllq", ADDR_W, dq_mode, ADDR_I, b_mode, Operation.SLL)
}
};
public GRPDecoder(String name, int number) {
super(name);
this.number = number;
}
public Instruction decode(BinaryInputBuffer bytesArray, int index, int instrStartIndex, int segmentOverride, int prefixes, X86InstructionFactory factory) {
this.byteIndex = index;
this.instrStartIndex = instrStartIndex;
this.prefixes = prefixes;
int ModRM = readByte(bytesArray, byteIndex);
int reg = (ModRM >> 3) & 7;
InstructionDecoder instrDecoder = grpTable[number][reg];
Instruction instr = null;
if(instrDecoder != null) {
instr = instrDecoder.decode(bytesArray, byteIndex, instrStartIndex, segmentOverride, prefixes, factory);
byteIndex = instrDecoder.getCurrentIndex();
}
return instr;
}
}