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// SPDX-License-Identifier: BSD-3-Clause
//
// ExportFunctionIndex.java - Ghidra post-script: dump a complete inventory of
// the analyzed program: functions, symbols (exports/imports), memory blocks
// and per-function references to interesting callees, plus the address of
// every function that is reachable from the exported CUDA entry points.
//
// This is the primary "map" artifact for a CUDA userspace driver version: it
// lets later tooling and analysis answer "what is at libcuda+0xNNNNNN" and
// "which internal function implements exported cuFoo".
//
// Usage (analyzeHeadless, on an already analyzed program):
// -process <program> -noanalysis \
// -postScript ExportFunctionIndex.java <outdir>
//
// Outputs (all TSV, one row per item, with a header row):
// <outdir>/functions.tsv addr size name namespace is_exported
// is_external is_thunk has_body entry_bytes
// <outdir>/exports.tsv addr size name
// <outdir>/imports.tsv addr name library
// <outdir>/blocks.tsv name start end size r/w/x
// <outdir>/callgraph.tsv caller_addr callee_addr call_sites
// <outdir>/strings.tsv addr length string (first 200 chars)
//
// The callgraph is produced from Ghidra's reference model for call
// instructions inside each function body.
import ghidra.app.script.GhidraScript;
import ghidra.program.model.address.Address;
import ghidra.program.model.address.AddressSetView;
import ghidra.program.model.listing.Data;
import ghidra.program.model.listing.DataIterator;
import ghidra.program.model.listing.Function;
import ghidra.program.model.listing.FunctionIterator;
import ghidra.program.model.listing.Listing;
import ghidra.program.model.mem.MemoryBlock;
import ghidra.program.model.symbol.Reference;
import ghidra.program.model.symbol.ReferenceIterator;
import ghidra.program.model.symbol.Symbol;
import ghidra.program.model.symbol.SymbolIterator;
import ghidra.program.model.symbol.SymbolTable;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;
public class ExportFunctionIndex extends GhidraScript {
private PrintWriter open(String dir, String name) throws Exception {
return new PrintWriter(new BufferedWriter(new FileWriter(dir + "/" + name)));
}
@Override
public void run() throws Exception {
String[] args = getScriptArgs();
if (args.length < 1) {
println("usage: ExportFunctionIndex.java <outdir>");
return;
}
String outdir = args[0];
new java.io.File(outdir).mkdirs();
Listing listing = currentProgram.getListing();
SymbolTable symtab = currentProgram.getSymbolTable();
// Ghidra may load a PIE/shared object at a non-zero image base (this
// build uses 0x100000). All *file virtual addresses* (what the public
// docs cite as libcuda+0x...) are program addresses minus this base.
long imageBase = currentProgram.getImageBase().getOffset();
// ---- functions -------------------------------------------------------
int nfunc = 0, nexport = 0, nexternal = 0;
Map<Long, String> exported = new HashMap<>();
try (PrintWriter w = open(outdir, "functions.tsv")) {
w.println("addr\tfile_addr\tsize\tname\tnamespace\texported\texternal\tthunk\tbody");
FunctionIterator fit = listing.getFunctions(true);
while (fit.hasNext() && !monitor.isCancelled()) {
Function f = fit.next();
Address ep = f.getEntryPoint();
boolean isExt = f.isExternal();
boolean isThunk = f.isThunk();
String ns = f.getParentNamespace() != null
? f.getParentNamespace().getName(true) : "";
String name = f.getName();
long size = f.getBody().getNumAddresses();
w.printf("0x%08x\t0x%08x\t%d\t%s\t%s\t%s\t%s\t%s\t%s%n",
ep.getOffset(), ep.getOffset() - imageBase, size, name, ns,
isExt ? "0" : (symtab.isExternalEntryPoint(ep) ? "1" : "0"),
isExt ? "1" : "0", isThunk ? "1" : "0",
size > 0 ? "1" : "0");
nfunc++;
if (!isExt) {
for (Symbol s : symtab.getSymbols(ep)) {
if (s.isExternalEntryPoint() || s.isGlobal()) {
exported.put(ep.getOffset(), s.getName(true));
}
}
}
if (isExt) nexternal++;
}
}
// ---- exports: symbols flagged external-entry / global in .text ------
// The loader marks ELF .dynsym definitions; enumerating them via the
// symbol table is exact and independent of the function iterator.
try (PrintWriter w = open(outdir, "exports.tsv")) {
w.println("addr\tfile_addr\tsize\tname");
SymbolIterator sit = symtab.getAllSymbols(true);
while (sit.hasNext() && !monitor.isCancelled()) {
Symbol s = sit.next();
Address a = s.getAddress();
if (a == null || !a.isMemoryAddress()) continue;
if (!symtab.isExternalEntryPoint(a)) continue;
Function f = listing.getFunctionAt(a);
long size = f != null ? f.getBody().getNumAddresses() : 0;
w.printf("0x%08x\t0x%08x\t%d\t%s%n", a.getOffset(), a.getOffset() - imageBase, size, s.getName(true));
nexport++;
}
}
// ---- imports: external functions and the library they come from ----
try (PrintWriter w = open(outdir, "imports.tsv")) {
w.println("addr\tfile_addr\tname\tlibrary");
FunctionIterator fit = listing.getFunctions(true);
while (fit.hasNext() && !monitor.isCancelled()) {
Function f = fit.next();
if (!f.isExternal()) continue;
String lib = f.getParentNamespace() != null
? f.getParentNamespace().getName(true) : "";
w.printf("0x%08x\t0x%08x\t%s\t%s%n",
f.getEntryPoint().getOffset(),
f.getEntryPoint().getOffset() - imageBase, f.getName(), lib);
}
}
// ---- memory blocks ---------------------------------------------------
try (PrintWriter w = open(outdir, "blocks.tsv")) {
w.println("name\tstart\tend\tsize\tr\tw\tx\tinitialized");
for (MemoryBlock b : currentProgram.getMemory().getBlocks()) {
w.printf("%s\t0x%08x\t0x%08x\t%d\t%s\t%s\t%s\t%s%n",
b.getName(), b.getStart().getOffset(), b.getEnd().getOffset(),
b.getSize(), b.isRead() ? "1" : "0", b.isWrite() ? "1" : "0",
b.isExecute() ? "1" : "0", b.isInitialized() ? "1" : "0");
}
}
// ---- call graph ------------------------------------------------------
// Function.getCalledFunctions() is the reliable API: it resolves both
// direct calls and call-through references recorded by the analyzers,
// independent of how the reference manager indexes them.
int edges = 0;
try (PrintWriter w = open(outdir, "callgraph.tsv")) {
w.println("caller\tcallee\tcaller_file\tcallee_file");
FunctionIterator fit = listing.getFunctions(true);
while (fit.hasNext() && !monitor.isCancelled()) {
Function f = fit.next();
if (f.isExternal()) continue;
for (Function callee : f.getCalledFunctions(monitor)) {
w.printf("0x%08x\t0x%08x\t0x%08x\t0x%08x%n",
f.getEntryPoint().getOffset(),
callee.getEntryPoint().getOffset(),
f.getEntryPoint().getOffset() - imageBase,
callee.getEntryPoint().getOffset() - imageBase);
edges++;
}
}
}
// ---- defined strings -------------------------------------------------
int nstr = 0;
try (PrintWriter w = open(outdir, "strings.tsv")) {
w.println("addr\tfile_addr\tlength\tstring");
DataIterator dit = listing.getDefinedData(true);
while (dit.hasNext() && !monitor.isCancelled()) {
Data d = dit.next();
if (!d.hasStringValue()) continue;
Object v = d.getValue();
if (v == null) continue;
String s = v.toString().replace("\t", " ").replace("\n", "\\n");
if (s.length() > 200) s = s.substring(0, 200);
w.printf("0x%08x\t0x%08x\t%d\t%s%n", d.getAddress().getOffset(),
d.getAddress().getOffset() - imageBase, d.getLength(), s);
nstr++;
}
}
println(String.format(
"[ExportFunctionIndex] functions=%d exports=%d imports=%d callgraph_edges=%d strings=%d",
nfunc, nexport, nexternal, edges, nstr));
}
}
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