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// Ghidra script to do basic disassembly analysis of GSP .fwimage binary
// Usage: analyzeHeadless ... -postScript BasicAnalysis.java
import ghidra.app.script.GhidraScript;
import ghidra.program.model.listing.*;
import ghidra.program.model.mem.*;
import ghidra.program.model.symbol.*;
import ghidra.program.model.address.*;
import ghidra.util.task.TaskMonitor;
import java.io.*;
import java.util.*;
import java.nio.file.*;
public class BasicAnalysis extends GhidraScript {
@Override
protected void run() throws Exception {
Program program = getCurrentProgram();
Listing listing = program.getListing();
Memory memory = program.getMemory();
FunctionManager functionManager = program.getFunctionManager();
println("=== GSP Firmware .fwimage Basic Analysis ===");
println("Program: " + program.getName());
println("Architecture: " + program.getLanguage().toString());
// Create output directory
String outputDir = "/home/rmcore/Git/integdev_gpu_drv/open-iov/firmware/570-GSP";
Files.createDirectories(Paths.get(outputDir));
// 1. Check memory blocks
println("\n--- Memory Blocks ---");
List<Map<String, Object>> memBlocks = new ArrayList<>();
for (MemoryBlock block : memory.getBlocks()) {
Map<String, Object> blockInfo = new HashMap<>();
blockInfo.put("name", block.getName());
blockInfo.put("start", block.getStart().toString());
blockInfo.put("end", block.getEnd().toString());
blockInfo.put("size", block.getSize());
blockInfo.put("execute", block.isExecute());
blockInfo.put("read", block.isRead());
blockInfo.put("write", block.isWrite());
memBlocks.add(blockInfo);
println(" " + block.getName() + ": " + block.getStart() + " - " + block.getEnd() +
" (" + block.getSize() + " bytes) r=" + block.isRead() + " w=" + block.isWrite() + " x=" + block.isExecute());
}
writeJson(outputDir + "/memory_blocks.json", memBlocks);
// 2. Find all functions
println("\n--- Finding Functions ---");
List<Map<String, Object>> functions = new ArrayList<>();
FunctionIterator funcIter = functionManager.getFunctions(true);
int count = 0;
while (funcIter.hasNext()) {
Function func = funcIter.next();
Map<String, Object> funcInfo = new HashMap<>();
funcInfo.put("name", func.getName());
funcInfo.put("entry", func.getEntryPoint().toString());
funcInfo.put("size", func.getBody().getNumAddresses());
functions.add(funcInfo);
count++;
if (count % 1000 == 0) {
println(" Found " + count + " functions...");
}
}
println("Total functions: " + functions.size());
writeJson(outputDir + "/functions.json", functions);
// 3. Find strings
println("\n--- Finding Strings ---");
List<Map<String, String>> strings = new ArrayList<>();
DataIterator dataIter = listing.getDefinedData(true);
while (dataIter.hasNext()) {
Data data = dataIter.next();
if (data.getDataType().getName().equals("string")) {
Object value = data.getValue();
if (value != null && value.toString().length() > 4) {
Map<String, String> strInfo = new HashMap<>();
strInfo.put("address", data.getAddress().toString());
strInfo.put("value", value.toString());
strings.add(strInfo);
}
}
}
println("Found " + strings.size() + " strings");
// Filter for interesting strings
String[] interestingKeywords = {"vgpu", "vmiop", "rpc", "hal", "bar", "migrate", "init", "boot", "kgsp", "wpr", "firmware", "version", "error", "fail", "assert", "panic", "nvidia", "rmapi", "gsp", "falcon", "mailbox", "interrupt", "dma", "iommu", "page", "mmu", "pde", "pte"};
List<Map<String, String>> interestingStrings = new ArrayList<>();
for (Map<String, String> s : strings) {
String val = s.get("value").toLowerCase();
for (String kw : interestingKeywords) {
if (val.contains(kw)) {
interestingStrings.add(s);
break;
}
}
}
println("Interesting strings: " + interestingStrings.size());
writeJson(outputDir + "/interesting_strings.json", interestingStrings);
// 4. Find entry point
println("\n--- Entry Point Analysis ---");
Address entryAddr = program.getMinAddress();
println("Program entry (min address): " + entryAddr);
Function funcAtZero = functionManager.getFunctionAt(entryAddr);
if (funcAtZero != null) {
println("Function at entry: " + funcAtZero.getName());
} else {
println("No function at entry point - creating one...");
Function func = functionManager.createFunction("entry_point", entryAddr, null, null, monitor);
if (func != null) {
println("Created function: " + func.getName());
}
}
println("\n--- Analysis Complete ---");
println("Results saved to " + outputDir);
}
private void writeJson(String path, Object data) throws IOException {
StringBuilder json = new StringBuilder();
json.append("[\n");
if (data instanceof List) {
List<?> list = (List<?>) data;
for (int i = 0; i < list.size(); i++) {
Object item = list.get(i);
if (item instanceof Map) {
Map<?, ?> map = (Map<?, ?>) item;
json.append(" {");
int j = 0;
for (Map.Entry<?, ?> entry : map.entrySet()) {
json.append("\"").append(entry.getKey()).append("\": ");
Object val = entry.getValue();
if (val instanceof String) {
json.append("\"").append(escapeJson(val.toString())).append("\"");
} else {
json.append(val);
}
if (j < map.size() - 1) json.append(", ");
j++;
}
json.append("}");
}
if (i < list.size() - 1) json.append(",");
json.append("\n");
}
}
json.append("]");
Files.writeString(Paths.get(path), json.toString());
}
private String escapeJson(String s) {
return s.replace("\\", "\\\\").replace("\"", "\\\"").replace("\n", "\\n").replace("\r", "\\r").replace("\t", "\\t");
}
}
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