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This commit is contained in:
Adam
2015-09-20 14:29:11 -04:00
parent 762c6ba543
commit 1b063d9e12
1 changed files with 39 additions and 26 deletions
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65
src/main/java/net/runelite/deob/deobfuscators/arithmetic/MultiplicationDeobfuscator.java
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@@ -1,5 +1,6 @@
package net.runelite.deob.deobfuscators.arithmetic; package net.runelite.deob.deobfuscators.arithmetic;
import java.util.ArrayList;
import java.util.List; import java.util.List;
import net.runelite.deob.ClassGroup; import net.runelite.deob.ClassGroup;
import net.runelite.deob.Deobfuscator; import net.runelite.deob.Deobfuscator;
@@ -17,6 +18,8 @@ public class MultiplicationDeobfuscator implements Deobfuscator
{ {
private ClassGroup group; private ClassGroup group;
// find a chain of multiplication instructions, evaluate and set one to the constant and the others to 1
@Override @Override
public void run(ClassGroup group) public void run(ClassGroup group)
{ {
@@ -27,6 +30,16 @@ public class MultiplicationDeobfuscator implements Deobfuscator
System.out.println("Simplified " + i + " multiplication"); System.out.println("Simplified " + i + " multiplication");
} }
private List<InstructionContext> getConstants(InstructionContext ctx)
{
List<InstructionContext> l = new ArrayList<>();
for (StackContext sctx : ctx.getPops())
{
InstructionContext i = sctx.getPushed();
}
}
private int runOnce() private int runOnce()
{ {
Execution e = new Execution(group); Execution e = new Execution(group);
@@ -41,32 +54,32 @@ public class MultiplicationDeobfuscator implements Deobfuscator
if (!(ictx.getInstruction() instanceof IMul)) if (!(ictx.getInstruction() instanceof IMul))
continue; continue;
Instructions ins = ictx.getInstruction().getInstructions(); // Instructions ins = ictx.getInstruction().getInstructions();
List<Instruction> ilist = ins.getInstructions(); // List<Instruction> ilist = ins.getInstructions();
//
if (!ilist.contains(ictx.getInstruction())) // if (!ilist.contains(ictx.getInstruction()))
continue; // already done // continue; // already done
//
StackContext one = ictx.getPops().get(0); // StackContext one = ictx.getPops().get(0);
StackContext two = ictx.getPops().get(1); // StackContext two = ictx.getPops().get(1);
//
if (one.getPushed().getInstruction() instanceof PushConstantInstruction // if (one.getPushed().getInstruction() instanceof PushConstantInstruction
&& two.getPushed().getInstruction() instanceof PushConstantInstruction) // && two.getPushed().getInstruction() instanceof PushConstantInstruction)
{ // {
PushConstantInstruction pci1 = (PushConstantInstruction) one.getPushed().getInstruction(), // PushConstantInstruction pci1 = (PushConstantInstruction) one.getPushed().getInstruction(),
pci2 = (PushConstantInstruction) two.getPushed().getInstruction(); // pci2 = (PushConstantInstruction) two.getPushed().getInstruction();
//
int i1 = (int) pci1.getConstant().getObject(), // int i1 = (int) pci1.getConstant().getObject(),
i2 = (int) pci2.getConstant().getObject(); // i2 = (int) pci2.getConstant().getObject();
//
int result = i1 * i2; // int result = i1 * i2;
//
ictx.removeStack(1); // ictx.removeStack(1);
ictx.removeStack(0); // ictx.removeStack(0);
//
ins.replace(ictx.getInstruction(), new LDC_W(ins, new net.runelite.deob.pool.Integer(result))); // ins.replace(ictx.getInstruction(), new LDC_W(ins, new net.runelite.deob.pool.Integer(result)));
++count; // ++count;
} // }
} }
return count; return count;