122 lines
3.4 KiB
Java
122 lines
3.4 KiB
Java
/* ###
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* IP: GHIDRA
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* REVIEWED: YES
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// Script repairs incorrect use of Function Definition applied directly
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// on function parameters/variables when it should be a pointer to a
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// Function Definition. This resolves variable size errors which
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// result from this bad data state.
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//
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//@category Repair
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import ghidra.app.script.GhidraScript;
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import ghidra.program.model.address.Address;
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import ghidra.program.model.data.*;
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import ghidra.program.model.listing.*;
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import ghidra.program.model.symbol.SourceType;
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import ghidra.util.Msg;
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import ghidra.util.exception.InvalidInputException;
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import java.util.Arrays;
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import java.util.Comparator;
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public class RepairFuncDefinitionUsageScript extends GhidraScript {
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private static class MyVariableOffsetComparator implements Comparator<Variable> {
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@Override
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public int compare(Variable o1, Variable o2) {
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// sort with most positive offset first
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long offset1 = getOffset(o1);
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long offset2 = getOffset(o2);
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if (offset1 == offset2) {
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return 0;
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}
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if (offset1 > offset2) {
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return -1;
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}
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return 1;
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}
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private long getOffset(Variable var) {
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Address minAddress = var.getMinAddress();
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if (minAddress == null) {
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return 0;
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}
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return minAddress.getOffset();
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}
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}
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private static Comparator<Variable> VARIABLE_COMPARATOR = new MyVariableOffsetComparator();
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@Override
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public void run() throws Exception {
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if (currentProgram == null) {
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return;
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}
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DataTypeManager dtm = currentProgram.getDataTypeManager();
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int cnt = 0;
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int bad = 0;
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int total = 0;
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FunctionIterator functions = currentProgram.getFunctionManager().getFunctions(true);
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while (functions.hasNext()) {
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Function func = functions.next();
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Variable[] vars = func.getAllVariables();
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Arrays.sort(vars, VARIABLE_COMPARATOR);
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for (Variable var : vars) {
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++total;
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if (var.getVariableStorage().isBadStorage()) {
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Msg.error(this,
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"Repair failed at " + var.getName() + "@" + func.getEntryPoint() +
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": variable has invalid storage!");
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++bad;
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continue;
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}
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DataType dt = var.getDataType();
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if (dt instanceof FunctionDefinition) {
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dt = PointerDataType.getPointer(dt, dtm);
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try {
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try {
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var.setDataType(dt, SourceType.ANALYSIS);
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}
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catch (VariableSizeException e) {
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Msg.warn(this,
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"Repair conflict at " + var.getName() + "@" + func.getEntryPoint() +
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" affected stack offset of other variables/parameters");
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var.setDataType(dt, true, true, SourceType.ANALYSIS);
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}
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++cnt;
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}
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catch (InvalidInputException e) {
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Msg.warn(this,
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"Repair failed at " + var.getName() + "@" + func.getEntryPoint() + ":" +
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e.toString());
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}
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}
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}
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}
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popup("Repaired " + cnt + " variables/parameters out of " + total + " variables, " + bad +
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" bad variables found");
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}
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}
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