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IT GETS ME EVERY TIME

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This commit is contained in:
Adam
2015-09-25 12:40:47 -04:00
parent ae8544cea1
commit 5be7604ee9
5 changed files with 107 additions and 3 deletions
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5
src/main/java/net/runelite/deob/Deob.java
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@@ -28,6 +28,7 @@ import net.runelite.deob.deobfuscators.UnusedParameters;
import net.runelite.deob.deobfuscators.arithmetic.ModArith;
import net.runelite.deob.deobfuscators.arithmetic.MultiplicationDeobfuscator;
import net.runelite.deob.deobfuscators.arithmetic.MultiplyOneDeobfuscator;
import net.runelite.deob.deobfuscators.arithmetic.MultiplyZeroDeobfuscator;
import net.runelite.deob.execution.Execution;
public class Deob
@@ -85,7 +86,9 @@ public class Deob
//new MultiplicationDeobfuscator().run(group);
new MultiplyOneDeobfuscator().run(group);
//new MultiplyOneDeobfuscator().run(group);
new MultiplyZeroDeobfuscator().run(group);
saveJar(group, args[1]);

1
src/main/java/net/runelite/deob/deobfuscators/UnreachedCode.java
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@@ -22,7 +22,6 @@ public class UnreachedCode implements Deobfuscator
List<Instruction> insCopy = new ArrayList<>(ins.getInstructions());
for (int j = 0; j < insCopy.size(); ++j)
//for (Instruction i : new ArrayList<>(ins.getInstructions()))
{
Instruction i = insCopy.get(j);

2
src/main/java/net/runelite/deob/deobfuscators/arithmetic/MultiplicationDeobfuscator.java
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@@ -59,6 +59,8 @@ public class MultiplicationDeobfuscator implements Deobfuscator
private int runOnce()
{
group.buildClassGraph();
Execution e = new Execution(group);
e.populateInitialMethods();
e.run();

4
src/main/java/net/runelite/deob/deobfuscators/arithmetic/MultiplyOneDeobfuscator.java
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@@ -17,6 +17,8 @@ public class MultiplyOneDeobfuscator implements Deobfuscator
@Override
public void run(ClassGroup group)
{
group.buildClassGraph();
Execution e = new Execution(group);
e.populateInitialMethods();
e.run();
@@ -61,7 +63,7 @@ public class MultiplyOneDeobfuscator implements Deobfuscator
++count;
}
System.out.println("Removed " + count + " multiplications");
System.out.println("Removed " + count + " 1 multiplications");
}
}

98
src/main/java/net/runelite/deob/deobfuscators/arithmetic/MultiplyZeroDeobfuscator.java Normal file
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@@ -0,0 +1,98 @@
package net.runelite.deob.deobfuscators.arithmetic;
import java.util.List;
import net.runelite.deob.ClassGroup;
import net.runelite.deob.Deobfuscator;
import net.runelite.deob.attributes.code.Instruction;
import net.runelite.deob.attributes.code.Instructions;
import net.runelite.deob.attributes.code.instruction.types.PushConstantInstruction;
import net.runelite.deob.attributes.code.instructions.IMul;
import net.runelite.deob.attributes.code.instructions.LDC_W;
import net.runelite.deob.execution.Execution;
import net.runelite.deob.execution.Frame;
import net.runelite.deob.execution.InstructionContext;
import net.runelite.deob.execution.StackContext;
public class MultiplyZeroDeobfuscator implements Deobfuscator
{
@Override
public void run(ClassGroup group)
{
group.buildClassGraph();
Execution e = new Execution(group);
e.populateInitialMethods();
e.run();
int count = 0;
for (Frame frame : e.processedFrames)
for (InstructionContext ictx : frame.getInstructions())
{
Instruction instruction = ictx.getInstruction();
Instructions ins = instruction.getInstructions();
if (frame.getMethod().getName().equals("method3678"))
//if (ins.getCode().getAttributes().getMethod().getName().equals("method3678"))
{
int i = 5;
}
if (!(instruction instanceof IMul))
continue;
List<Instruction> ilist = ins.getInstructions();
StackContext one = ictx.getPops().get(0);
StackContext two = ictx.getPops().get(1);
Instruction ione = one.getPushed().getInstruction(),
itwo = two.getPushed().getInstruction();
boolean remove = false;
if (ione instanceof PushConstantInstruction)
{
PushConstantInstruction pci = (PushConstantInstruction) ione;
int value = (int) pci.getConstant().getObject();
if (value == 0)
remove = true;
if (value == -1408052237)
{
int i = 5;
}
}
if (itwo instanceof PushConstantInstruction)
{
PushConstantInstruction pci = (PushConstantInstruction) itwo;
int value = (int) pci.getConstant().getObject();
if (value == 0)
remove = true;
if (value == -1408052237)
{
int i = 5;
}
}
if (remove == false)
{
continue;
}
if (!ilist.contains(instruction))
continue; // already done
// remove both, remove imul, push 0
ictx.removeStack(1);
ictx.removeStack(0);
ins.replace(instruction, new LDC_W(ins, new net.runelite.deob.pool.Integer(0)));
++count;
}
System.out.println("Removed " + count + " 0 multiplications");
}
}