/
CreatePointerScript.java
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/
CreatePointerScript.java
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/**
* The MIT License (MIT)
*
* Copyright (c) 2022 Andrew J. Strelsky
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
// Script to go through the current memory block to create all valid pointers
//@category Data
//@author Andrew J. Strelsky
import ghidra.app.script.GhidraScript;
import ghidra.program.model.address.*;
import ghidra.program.model.data.PointerDataType;
import ghidra.program.model.listing.*;
import ghidra.program.model.mem.Memory;
import ghidra.program.model.mem.MemoryBlock;
import ghidra.util.exception.AssertException;
public final class CreatePointerScript extends GhidraScript {
private int pointerSize;
@Override
public void run() throws Exception {
this.pointerSize = currentProgram.getDefaultPointerSize();
MemoryBlock block = getMemoryBlock(currentAddress);
Address addr = block.getStart();
monitor.initialize(block.getSize() / pointerSize);
monitor.setMessage("Creating Pointers");
while (block.contains(addr)) {
monitor.checkCanceled();
if (isPointer(addr)) {
try {
createData(addr, PointerDataType.dataType);
println("Pointer created at "+addr.toString());
} catch (Exception e) {
// dont care
}
}
try {
addr = addr.add(pointerSize);
} catch (AddressOutOfBoundsException e) {
break;
} finally {
monitor.incrementProgress(1);
}
}
}
private boolean isPointer(Address addr) {
if (getDataContaining(addr) != null) {
return false;
}
Memory mem = currentProgram.getMemory();
AddressSetView set = mem.getLoadedAndInitializedAddressSet();
try {
Address value = getPointerValue(addr);
if (!set.contains(value)) {
return false;
}
CodeUnit cu = getInstructionContaining(value);
if (cu == null) {
cu = getDataContaining(value);
}
if (cu != null && !value.equals(cu.getAddress())) {
return false;
}
return true;
} catch (Exception e) {
return false;
}
}
private Address getPointerValue(Address addr) throws Exception {
Memory mem = currentProgram.getMemory();
switch (pointerSize) {
case 4:
return toAddr(mem.getInt(addr));
case 8:
return toAddr(mem.getLong(addr));
default:
throw new AssertException();
}
}
}