// GhidraScript: print instructions around one or more addresses.
// Usage: DumpInstructions.java 0x001b184c 0x001b1870

import ghidra.app.script.GhidraScript;
import ghidra.program.model.listing.Function;
import ghidra.program.model.listing.Instruction;

public class DumpInstructions extends GhidraScript {
    @Override
    public void run() throws Exception {
        String[] args = getScriptArgs();
        if (args == null || args.length == 0) {
            printerr("DumpInstructions: needs one or more addresses");
            return;
        }
        for (String arg : args) {
            Instruction center = getInstructionContaining(toAddr(Long.decode(arg)));
            println("=== " + arg + " ===");
            if (center == null) {
                println("(no instruction)");
                continue;
            }
            Instruction cursor = center;
            for (int i = 0; i < 18; ++i) {
                Instruction previous = cursor.getPrevious();
                if (previous == null) break;
                cursor = previous;
            }
            for (int i = 0; i < 40 && cursor != null; ++i) {
                Function function = getFunctionContaining(cursor.getAddress());
                String marker = cursor.getAddress().equals(center.getAddress()) ? "=>" : "  ";
                println(marker + " " + cursor.getAddress() + "  " +
                        (function == null ? "" : function.getName() + "  ") + cursor);
                cursor = cursor.getNext();
            }
        }
    }
}