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/*******************************************************************************
* Copyright (c) 2000, 2015 QNX Software Systems and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* QNX Software Systems - Initial API and implementation
* Ericsson - Adapted for DSF
* Dmitry Kozlov (Mentor Graphics) - Add tab symbols parsing (Bug 391115)
* William Riley (Renesas) - Add raw Opcode parsing (Bug 357270)
*******************************************************************************/
package org.eclipse.cdt.dsf.mi.service.command.output;
import java.math.BigInteger;
import org.eclipse.cdt.dsf.debug.service.AbstractInstruction;
public class MIInstruction extends AbstractInstruction {
// The parsed information
BigInteger address;
String function = ""; //$NON-NLS-1$
long offset;
String opcode = ""; //$NON-NLS-1$
String args = ""; //$NON-NLS-1$
BigInteger rawOpcodes = null;
Integer opcodeSize = null;
public MIInstruction(MITuple tuple) {
parse(tuple);
}
@Override
public BigInteger getAdress() {
return address;
}
@Override
public String getFuntionName() {
return function;
}
@Override
public long getOffset() {
return offset;
}
@Override
public String getInstruction() {
return opcode + "\t" + args; //$NON-NLS-1$;
}
@Override
public String getOpcode() {
return opcode;
}
@Override
public String getArgs() {
return args;
}
@Override
public BigInteger getRawOpcodes() {
return rawOpcodes;
}
/**
* Parse the assembly instruction result. Each instruction has the following
* fields:
* - Address
* - Function name
* - Offset
* - Instruction
*
* {address="0x000107c0",func-name="main",offset="4",inst="mov 2, %o0"},
* {address="0x000107c4",func-name="main",offset="8",inst="sethi %hi(0x11800), %o2"},
* ...,
* {address="0x00010820",func-name="main",offset="100",inst="restore "}
*
* An instruction may also contain:
* - Opcode bytes
*
* {address="0x004016b9",func-name="main",offset="9",opcodes="e8 a2 05 00 00",
* inst="call 0x401c60 <__main>"},
* ...,
*
* In addition, the opcode and arguments are extracted form the assembly instruction.
*/
private void parse(MITuple tuple) {
MIResult[] results = tuple.getMIResults();
for (int i = 0; i < results.length; i++) {
String var = results[i].getVariable();
MIValue value = results[i].getMIValue();
String str = ""; //$NON-NLS-1$
if (value instanceof MIConst) {
str = ((MIConst) value).getCString();
}
if (var.equals("address")) { //$NON-NLS-1$
try {
address = decodeAddress(str.trim());
} catch (NumberFormatException e) {
}
continue;
}
if (var.equals("func-name")) { //$NON-NLS-1$
function = str;
continue;
}
if (var.equals("offset")) { //$NON-NLS-1$
try {
offset = Long.decode(str.trim()).longValue();
} catch (NumberFormatException e) {
}
continue;
}
if (var.equals("inst")) { //$NON-NLS-1$
/* for the instruction, we do not want the C string but the
translated string since the only thing we are doing is
displaying it. */
if (value instanceof MIConst) {
str = ((MIConst) value).getString();
}
/* to avoid improper displaying of instructions we need to translate tabs */
str = str.replace("\\t", "\t"); //$NON-NLS-1$ //$NON-NLS-2$
char chars[] = str.toCharArray();
int index = 0;
// count the non-whitespace characters.
while ((index < chars.length) && (chars[index] > '\u0020'))
index++;
opcode = str.substring(0, index);
// skip any whitespace characters
while (index < chars.length && chars[index] >= '\u0000' && chars[index] <= '\u0020')
index++;
// guard no argument
if (index < chars.length)
args = str.substring(index);
continue;
}
if (var.equals("opcodes")) { //$NON-NLS-1$
try {
rawOpcodes = decodeOpcodes(str);
opcodeSize = Integer.valueOf(str.replace(" ", "").length() / 2); //$NON-NLS-1$//$NON-NLS-2$
} catch (NumberFormatException e) {
}
continue;
}
}
}
/**
* Decode given string representation of a non-negative integer. A
* hexadecimal encoded integer is expected to start with <code>0x</code>.
*
* @param string
* decimal or hexadecimal representation of an non-negative integer
* @return address value as <code>BigInteger</code>
*/
private static BigInteger decodeAddress(String string) {
if (string.startsWith("0x")) { //$NON-NLS-1$
return new BigInteger(string.substring(2), 16);
}
return new BigInteger(string);
}
/**
* Decode given string representation of a space separated hex encoded byte
* array
*
* @param string
* space separated hexadecimal byte array
* @return opcode bytes as <code>BigInteger</code>
*/
private static BigInteger decodeOpcodes(String string) {
// Removing space separation and parse as single big integer
return new BigInteger(string.replace(" ", ""), 16); //$NON-NLS-1$ //$NON-NLS-2$
}
/* (non-Javadoc)
* @see org.eclipse.cdt.dsf.debug.service.AbstractInstruction#getSize()
*/
@Override
public Integer getSize() {
return opcodeSize;
}
}
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