/**
* Get the statement at a specific label. If there is no statement stored, attempts to disassemble
* the instruction at the label's virtual address. If the address is outside of the file area,
* logs an error and returns a Halt statement by default.
*
* @param label The label for which to get the statement
* @return The statement object at label.
*/
public final RTLStatement getStatement(RTLLabel label) {
if (!statementMap.containsKey(label)) {
AbsoluteAddress address = label.getAddress();
Instruction instr = getInstruction(address);
// If we did not get an instruction, add an artificial Halt for recovery
if (instr == null) {
RTLHalt halt = new RTLHalt();
halt.setLabel(label);
putStatement(halt);
logger.error("ERROR: Replacing unknown instruction with HALT.");
if (Options.debug.getValue())
throw new DisassemblyException("Disassembly failed at " + address);
} else {
try {
StatementSequence seq = arch.getRTLEquivalent(address, instr);
for (RTLStatement s : seq) {
putStatement(s);
}
} catch (Exception e) {
logger.error("Error during translation of instruction to IL");
e.printStackTrace();
RTLStatement skip = new RTLSkip();
skip.setLabel(label);
skip.setNextLabel(new RTLLabel(new AbsoluteAddress(address.getValue() + 1)));
putStatement(skip);
}
assert statementMap.containsKey(label) : "Disassembly did not produce label: " + label;
}
}
return statementMap.get(label);
}
@Override
public Set<Tuple<RTLNumber>> projectionFromConcretization(RTLExpression... expressions) {
// Only concretize expression requests from transformerFactory
// Warning: If this method is invoked with 2 parameters for other reasons, it will
// likely fail!
if (expressions.length != 2) return null;
// If not on trace, don't concretize
if (isBot()) return null;
RTLExpression condition = expressions[0];
RTLExpression target = expressions[1];
RTLNumber cCondition;
RTLNumber cTarget;
Set<Tuple<RTLNumber>> res = new FastSet<Tuple<RTLNumber>>();
for (AbsoluteAddress successor : getNextPC()) {
RTLNumber nextPC = successor.toNumericConstant();
if (target instanceof RTLNumber) {
// If target is a number, this is a direct jump, and maybe conditional
cTarget = (RTLNumber) target;
if (condition instanceof RTLNumber) {
// Direct, unconditional jump
cCondition = (RTLNumber) condition;
} else if (target.equals(nextPC)) {
// Conditional jump that is taken according to the trace
cCondition = ExpressionFactory.TRUE;
} else {
// Conditional jump that is not taken
cCondition = ExpressionFactory.FALSE;
}
} else {
// Target is not a number, so this is an indirect jump
assert (condition instanceof RTLNumber)
: "There should be no conditional indirect jumps in x86!";
cCondition = (RTLNumber) condition;
cTarget = nextPC;
}
res.add(Tuple.create(cCondition, cTarget));
}
return res;
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
return cur.equals(((TraceReplayState) obj).cur);
}
/**
* Get the string representation of the specified assembly instruction assuming it is located at
* the given address.
*
* @param addr a virtual address
* @param instr an assembly instruction
* @return a string representation of the assembly code at the given address
*/
public String getInstructionString(AbsoluteAddress addr, Instruction instr) {
if (instr == null) return "NON_EXISTENT";
return instr.toString(addr.getValue(), symbolFinder(addr));
}
public boolean isStub(AbsoluteAddress a) {
return a.getValue() >= StubProvider.STUB_BASE;
}
@Override
public String getSymbolFor(AbsoluteAddress va) {
String symbol = symbols.get(va);
if (symbol != null) return symbol;
else return va.toString();
}
@Override
public AbsoluteAddress getVirtualAddress(long fp) {
return new AbsoluteAddress(baseAddress.getValue() + fp);
}
@Override
public AbsoluteAddress getMaxAddress() {
return new AbsoluteAddress(baseAddress.getValue() + inBuf.getSize());
}
@Override
public long getFilePointer(AbsoluteAddress va) {
return va.getValue() - baseAddress.getValue();
}
@Override
public String getIdentifier() {
return cur.toString();
}
@Override
public int hashCode() {
return cur.hashCode();
}
/**
* Returns the number of the section the given virtual address is in.
*
* @param va the virtual address
* @return the section number
*/
protected final int getSectionNumber(AbsoluteAddress va) {
return getSectionNumberByRVA(va.getValue() - getBaseAddress());
}
@Override
public final long getFilePointer(AbsoluteAddress va) {
long fp = getFilePointerFromRVA(va.getValue() - getBaseAddress());
if (fp >= 0) return fp;
else return -1;
}